title:
Four Pion Final States with Tagged Photons at Electron Positron
  Colliders

abstract:
  A Monte Carlo generator has been constructed to simulate the reaction e^+e^-
\to \gamma + 4 \pi, where the photon is assumed to be observed in the detector.
Only initial state radiation is considered. Additional collinear photon
radiation has been incorporated with the technique of structure functions.
Predictions are presented for cms energies of 1GeV, 3GeV and 10GeV,
corresponding to the energies of DAPHNE, BEBC and of B-meson factories. The
event rates are sufficiently high to allow for a precise measurement of R(Q^2)
in the region of Q between approximately 1GeV and 2.5GeV. For the construction
of the program we employ isospin relations between the amplitudes governing tau
decays into four pions and electron positron annihilation into four pions.
Estimates of the kinematic breaking of these isospin relations as a consequence
of the \pi^- -- \pi^0 mass difference are given.


title: Lepton asymmetry creation in the Early Universe

abstract:
  Oscillations of active to sterile neutrinos with a small mixing angle sin 2
\theta < 10^{-2} could generate a large lepton asymmetry in the Early Universe.
The final order of magnitude of the lepton asymmetry \eta is mainly determined
by its growth in the last stage of evolution, the so called power-law regime.
There exist two contradictory results in the literature, \eta \propto T^{-1}
and \eta \propto T^{-4}, where T is the background medium temperature. In the
first case, the lepton asymmetry does not exceed values of 10^{-4} for |\delta
m^2| < 1 eV^2, while in the second case it can become larger than 10^{-1}. In
this work we analytically investigate the case \eta \propto T^{-1}, using a new
approach to solve the kinetic equations. We find that the power-law solution
\eta \propto T^{-1} is not self-consistent. Instead, we find the power law \eta
\propto T^{-11/3} to be a good approximation, which leads to a large final
asymmetry.


title: Lepton Asymmetry of the Universe and Charged Quark-Gluon Plasma

abstract:
  The lepton asymmetry of order one is not excluded experimentally and, if
present, can lead to interesting phenomena in the early Universe. It is shown
that, when the temperature is above the quark-hadron transition, the lepton
asymmetry induces chemical potentials for electric charge and for baryon
number, and makes the quark-gluon plasma electrically charged.


title: The Dirac Operator Spectrum and Effective Field Theory

abstract:
  When chiral symmetry is spontaneously broken, the low-energy part of the
Dirac operator spectrum can be computed analytically in the chiral limit. The
tool is effective field theory or, equivalently in this case, Random Matrix
Theory.


title:
On the Relationship between Large Order Graphs and Instantons for the
  Double Well Oscillator

abstract:
  The double well oscillator is used as a QCD-like model for studying the
relationship between large order graphs and the instanton-antiinstanton
solution. We derive an equation for the perturbative coefficients of the ground
state energy when the number of 3 and/or 4-vertices is fixed and large. These
coefficients are determined in terms of an exact``bounce'' solution. When the
number of 4-vertices is analytically continued to be near the negative of half
the number of 3-vertices the bounce solution approaches the
instanton-antiinstanton solution and detremines leading Borel singularity.


title: The Anomaly and Reggeon Field Theory in QCD

abstract:
  The appearance of the U(1) anomaly in the interactions of reggeized gluons is
described. Also discussed is the crucial role the anomaly can play in providing
the non-perturbative properties necessary for a transition from gluon and quark
reggeon diagrams to hadron reggeons and a reggeon field theory description of
the pomeron.


title: Higgs Scalars in the Minimal Non-minimal Supersymmetric Standard Model

abstract:
  We consider the simplest and most economic version among the proposed
non-minimal supersymmetric models, in which the $\mu$-parameter is promoted to
a singlet superfield, whose all self-couplings are absent from the
renormalizable superpotential. Such a particularly simple form of the
renormalizable superpotential may be enforced by discrete $R$-symmetries which
are extended to the gravity-induced non-renormalizable operators as well. We
show explicitly that within the supergravity-mediated supersymmetry-breaking
scenario, the potentially dangerous divergent tadpoles associated with the
presence of the gauge singlet first appear at loop levels higher than 5 and
therefore do not destabilize the gauge hierarchy. The model provides a natural
explanation for the origin of the $\mu$-term, without suffering from the
visible axion or the cosmological domain-wall problem. Focusing on the Higgs
sector of this minimal non-minimal supersymmetric standard model, we calculate
its effective Higgs potential by integrating out the dominant quantum effects
due to stop squarks. We then discuss the phenomenological implications of the
Higgs scalars predicted by the theory for the present and future high-energy
colliders. In particular, we find that our new minimal non-minimal
supersymmetric model can naturally accommodate a relatively light charged Higgs
boson, with a mass close to the present experimental lower bound.


title:
Large Angle MSW Solution in Grand Unified Theories with SU(3) X U(1)
  Horizontal Symmetry

abstract:
  We construct a model with a SU(3) X U(1) horizontal symmetry in the context
of Grand Unified Theories. In our models, the bi-maximal lepton mixing and
suitable neutrino masses for the large angle MSW solution are obtained without
any fine-tuning due to the spontaneously broken SU(3)_H symmetry. The three
generations of quarks and leptons are unified as members of the SU(3)_H
fundamental representation, and the U(1)_H charge gives the origin of the
fermion mass hierarchy and mixing angles. We present two explicit examples of
SU(5)_GUT and SO(10)_GUT models, in which the Yukawa structures are given
successfully.


title: Constraints on R-Parity violating stop couplings from flavor physics

abstract:
  We perform a critical reassessment of the constraints on the R-parity and
baryon number violating (s)top couplings coming from flavor physics. In
particular, we study K0-K0bar mixing, including QCD corrections and a class of
diagrams that were neglected in previous analyses: both effects give sizeable
contributions. We explain how the resulting bounds can be translated into
constraints on individual couplings in the simplest class of flavor models,
based on U(1) horizontal symmetries. We finally discuss the implications for
the possibility of observing single superparticle production at the Tevatron.


title: QCD corrections to top quark spin correlations at hadron colliders

abstract:
  Future hadron collider experiments will allow for a detailed investigation of
$t\bar{t}$ spin correlation effects. In this talk, recent progress in the
theoretical description of these effects is reported. In particular,
next-to-leading order results for the $t\bar t$ spin correlations in
$q\bar{q}\to t\bar{t}X$ are presented, using various spin quantization axes.


title:
Heavy-to-light form factors: Symmetries at large recoil and calculation
  of alpha_s corrections

abstract:
  Recently it has been shown that in the large-recoil limit new symmetries
emerge which impose various relations on form factors that parametrise the
decay of heavy B mesons into light mesons. These symmetry relations are broken
by radiative QCD corrections. We show that these corrections are perturbatively
calculable, and present results to first order in the strong coupling constant
alpha_s.


title: A Lower Bound on sin 2\beta from Minimal Flavour Violation

abstract:
  We point out that there exists an absolute lower bound on sin 2\beta in all
models with minimal flavour violation (MFV), that do not have any new operators
beyond those present in the Standard Model and in which all flavour changing
transitions are governed by the CKM matrix with no new phases beyond the KM
phase. This bound depends only on V_{cb}, V_{ub} and the hadronic parameters
\hat B_K, F_{B_d}\sqrt{\hat B_d} and \xi relevant for the CP-violating
parameter \varepsilon and the B^0_{d,s}-\bar B^0_{d,s} mixings. Performing a
simple scanning over the present ranges of these parameters we find sin
2\beta\ge 0.34. We illustrate how this bound could become stronger when our
knowledge of the parameters in question improves and when the upper bound on
the B^0_{s}-\bar B^0_{s} mixing ((\Delta M)_s) will be experimentally known.
Provided the future accurate measurements of sin 2\beta through the CP
asymmetry in B_d^0(\bar B_d^0)\to \psi K_S will confirm the low values recently
reported by BaBar and Belle, there is a likely possibility that this class of
models will be excluded. This would firmly imply the necessity of new
CP-violating phases and/or new effective operators in the weak effective
Hamiltonians for K^0-\bar K^0 and B^0_{d,s}-\bar B^0_{d,s} mixings. We also
point out that within the MFV models there exists also an absolute lower bound
on the angle \gamma. We find \sin\gamma\ge 0.24. This lower bound could become
stronger in the future.


title: Angular structure of diffraction dissociation at LHC

abstract:
  We consider angular dependence of the diffractive dissociation processes at
high energies. It appeared that angular dependence of the diffractive
dissociation has no dip and bump structure at the LHC energies and would show a
smooth power-like decrease with $t$. The normalized differential cross-section
has a scaling behavior and depends on the ratio $-t/M^2$ only. These results
reflect general trends of unitarity limitations at high energies and are
realized within the chiral quark model with unitarization performed through the
generalized reaction matrix.


title: Photon Structure Functions Beyind the SUSY Threshold

abstract:
  We evolve virtual photon parton densities up to the SUSY threshold and higher
using coupled inhomogeneous DGLAP differential equations. Reliable input
parameterizations were available from the c-quark threshold. Limited
  $P^2$ ( target photon virtuality ) dependence is observed. The difference to
the photon structure function is shown to be significant with the introduction
of SUSY dependent splitting functions. A negligible difference is observed by
letting the gluino mass enter after the squark mass. An effort is made to
include the squark threshold effect in such a way that both the renormalization
group equations are satisfied and the perturbative calculation is reproduced.


title:
Charged-Lepton-Flavour Violation in Kaon Decays in Supersymmetric
  Theories

abstract:
  We discuss rare kaon decays that violate charged-lepton flavour conservation
in supersymmetric theories with and without R parity, in view of possible
experiments using an intense proton source as envisaged for a neutrino factory.
In the Minimal Supersymmetric Standard Model, such decays are generated by box
diagrams involving charginos and neutralinos, but the limits from \mu -> e
\gamma, \mu-e conversion and \Delta m_K constrain the branching ratios to
challengingly small values. However, this is no longer the case in R-violating
theories, where such decays may occur at tree level at rates close to the
present experimental limits. Within this framework, we obtain bounds on
products of LL\bar{E} and LQ\bar{D} operators from the experimental upper
limits on K^0 -> \mu^\pm e^\mp and K^{\pm,0} -> \pi^{\pm,0} \mu^\pm e^\mp
decays. We also note the possibility of like-sign lepton decays K^\pm ->
\pi^\mp \ell^\pm \ell^\pm in the presence of non-zero \tilde{b}_L-\tilde{b}_R
mixing. We conclude that rare kaon decays violating charged-lepton flavour
conservation could be an interesting signature of R violation.


title: Glueball Masses in Relativistic Potential Model

abstract:
  The problem of glueball mass spectra using the relativistic Dirac equation is
studied. Also the Breit-Fermi approach used to obtaining hyperfine splitting in
glueballs. Our approach is based on the assumption, that the nature and the
forces between two gluons are the short-range. We were to calculate the
glueball masses with used screened potential.


title: Economic Model for Neutrino Masses and Mixings

abstract:
  Working in the framework of three chiral neutrinos with Majorana masses, we
investigate a scenario where the neutrino mass matrix is strictly off-diagonal
in the flavor basis, with all its diagonal entries precisely zero.


title: pNRQCD: concepts and applications

abstract:
  Heavy quark bound state systems, mesons and hybrids, are discussed in the
framework of the QCD effective field theory called potential Non-Relativistic
QCD.


title:
Higher Twist Corrections and Maxima for DIS on a Proton in the High
  Density QCD Region

abstract:
  We show that the ratio of different structure functions have a maximum which
depends on energy. We argue, using Golec-Biernat and Wusthoff model, that these
maxima are the certain functions of the saturation scale. The analysis of
leading and higher twist contributions for different observables is given with
the aim of determining the kinematic region where high parton density effects
could be seen experimentally.


title: Beta-functions in Yang-Mills Theory from Non-critical String

abstract:
  The renormalization group equations of the Yang-Mills theory are examined in
the non-critical string theory according to the framework of the holography.
Under a simple ansatz for the tachyon, we could find several interesting
solutions which are classified by the value of the tachyon potential at the
vacuum. We show two typical, asymptotic-free solutions which are different in
their infrared behaviors. For both types of solutions, we could obtain
quark-confinement potential from the Wilson-loop. The stability of the tachyon
and the ZigZag symmetry are also discussed for these solutions.


title: KMS conditions for 4-point Green functions at finite temperature

abstract:
  We study the 4-point function in the Keldysh formalism of the closed time
path formulation of real time finite temperature field theory.
  We derive the KMS conditions for these functions and discuss the number of
4-point functions that are independent. We define a set of `physical' functions
which are linear combinations of the usual Keldysh functions. We show that
these functions satisfy simple KMS conditions. In addition, we consider a set
of integral equations which represent a resummation of ladder graphs. We show
that these integral equations decouple when one uses the physical functions
that we have defined. We discuss the generalization of these results to QED.


title:
Heavy quark photoproduction in the semihard QCD approach and the
  unintegrated gluon distribution

abstract:
  Processes of heavy quark photoproduction at HERA energies are considered
using the semihard (k_T factorization) QCD approach with emphasis of the BFKL
dynamics of gluon distributions. We investigate the dependences of the total
cross section of heavy quark photoproduction and also p_T, and rapidity
distributions on different forms of the unintegrated gluon distribution. We
present a comparision of the theoretical results with available H1 and ZEUS
experimental data for charm and beauty photoproductions.


title: The Delta I=1/2 rule and epsilon'/epsilon

abstract:
  The $\Delta I=1/2$ rule and direct CP violation $\epsilon'/\epsilon$ in kaon
decays are studied within the framework of the effective Hamiltonian approach
in conjunction with generalized factorization for hadronic matrix elements.


title: Implications of Recent Measurements of Nonleptonic Charmless B Decays

abstract:
  Implications of recent measurements of hadronic charmless B decays are
discussed.


title:
Single Charged Higgs production as a probe of CP violation at a Muon
  Collider

abstract:
  We consider single charged Higgs ($H^{\pm}$) production in association with a
$W^{\pm}$ boson at $\mu^+\mu^-$ colliders, in the context of the general CP
violating Two Higgs Doublet Model (2HDM). We find that large cross-sections for
the processes $\mu^+\mu^-\to H^+W^-,H^-W^+$ are possible, and offer an
attractive way of producing $H^{\pm}$ at $\mu^+\mu^-$ colliders. The difference
in the cross-sections for $H^+W^-$ and $H^-W^+$ may exceed 1000 fb, and this
represents a novel way of probing CP violation in the Higgs sector.


title:
Two-Loop Master Integrals for $\gamma^* \to 3$ Jets: The planar
  topologies

abstract:
  The calculation of the two-loop corrections to the three jet production rate
and to event shapes in electron-positron annihilation requires the computation
of a number of up to now unknown two-loop four-point master integrals with one
off-shell and three on-shell legs. In this paper, we compute those master
integrals which correspond to planar topologies by solving differential
equations in the external invariants which are fulfilled by the master
integrals. We obtain the master integrals as expansions in $\e=(4-d)/2$, where
$d$ is the space-time dimension. The results are expressed in terms of newly
introduced two-dimensional harmonic polylogarithms, whose properties are
shortly discussed. For all two-dimensional harmonic polylogarithms appearing in
the divergent parts of the integrals, expressions in terms of Nielsen's
polylogarithms are given. The analytic continuation of our results to other
kinematical situations is outlined.


title: Primordial magnetic fields from metric perturbations

abstract:
  We study the amplification of electromagnetic vacuum fluctuations induced by
the evolution of scalar metric perturbations at the end of inflation. Such
perturbations break the conformal invariance of Maxwell equations in
Friedmann-Robertson-Walker backgrounds and allow the growth of magnetic fields
on super-Hubble scales. We relate the strength of the fields generated by this
mechanism with the power spectrum of scalar perturbations and estimate the
amplification on galactic scales for different values of the spectral index.
Finally we discuss the possible effects of finite conductivity during
reheating.


title: g_1 at low x and low Q^2 with Polarized ep Colliders

abstract:
  Measurements of g_1 at low x and low Q^2 are expected to provide a sensitive
probe of the transition from Regge to perturbative QCD dynamics, offering a new
testing ground for models of small x physics. We discuss the potential of
polarized ep colliders (Polarized HERA and eRHIC) to investigate this physics
--- varying Q^2 between 0.01 and 1 GeV^2 --- and to constrain the high-energy
part of the Drell-Hearn-Gerasimov sum-rule for polarized photoproduction.


title: K -> pi pi Phenomenology in the Presence of Electromagnetism

abstract:
  We describe the influence of electromagnetism on the phenomenology of K -> pi
pi decays. This is required because the present data were analyzed without
inclusion of electromagnetic radiative corrections, and hence contain several
ambiguities and uncertainties which we describe in detail. Our presentation
includes a full description of the infrared effects needed for a new
experimental analysis. It also describes the general treatment of final state
interaction phases, needed because Watson's theorem is no longer valid in the
presence of electromagnetism. The phase of the isospin-two amplitude A_2 may be
modified by 50% -> 100%. We provide a tentative analysis using present data in
order to illustrate the sensitivity to electromagnetic effects, and also
discuss how the standard treatment of epsilon'/epsilon is modified.


title:
Next-to-leading order QCD corrections to parity-violating 3-jet
  observables for massive quarks in e^+e^- annihilation

abstract:
  In this work we provide all the missing ingredients for calculating
parity-violating 3-jet observables in e^+e^- collisions at next-to-leading
order (NLO) including the full quark mass dependence. In particular we give
explicit results for the one-loop corrections and for the singular
contributions from real emission processes. Our formulae allow for the
computation of the NLO 3-jet contributions to the forward-backward asymmetry
for heavy flavours, which is -- and will be -- an important observable for
electroweak physics at present and future e^+e^- colliders.


title: U-Spin Symmetry in Charmless B Decays

abstract:
  We prove a general theorem about equal CP rate differences within pairs of
U-spin related charmless $B$ and $B_s$ decays. Large deviations from equalities
would be evidence for new physics. Six pairs of decays into two pseudoscalar
mesons are identified where such relations hold. Ratios of corresponding rate
differences and certain ratios of rates measure U-spin breaking. These
processes provide useful information on the weak phase $\gamma={\rm Arg}
V^*_{ub}$. Applications of U-spin symmetry to other decays are discussed.


title: Light-Front QCD in Light-Cone Gauge

abstract:
  The light-front (LF) quantization of QCD in light-cone (l.c.) gauge is
discussed. The Dirac method is employed to construct the LF Hamiltonian and
theory quantized canonically. The Dyson-Wick perturbation theory expansion
based on LF-time ordering is constructed. The framework incorporates in it
simultaneously the Lorentz gauge condition as an operator equation as well. The
propagator of the dynamical $\psi_+$ part of the free fermionic propagator is
shown to be causal while the gauge field propagator is found to be transverse.
The interaction Hamiltonian is re-expressed in the form closely resembling the
one in covariant theory, except for additional instantaneous interactions,
which can be treated systematically. Some explicit computations in QCD are
given.


title:
From colored glass condensate to gluon plasma: equilibration in high
  energy heavy ion collisions

abstract:
  The initial distribution of gluons at the very early times after a high
energy heavy ion collision is described by the bulk scale $Q_s$ of gluon
saturation in the nuclear wavefunction. The subsequent evolution of the system
towards kinetic equilibrium is described by a non-linear Landau equation for
the single particle distributions \cite{Mueller1,Mueller2}. In this paper, we
solve this equation numerically for the idealized initial conditions proposed
by Mueller, and study the evolution of the system to equilibrium. We discuss
the sensitivity of our results on the dynamical screening of collinear
divergences. In a particular model of dynamical screening, the convergence to
the hydrodynamic limit is seen to be rapid relative to hydrodynamic time
scales. The equilibration time, the initial temperature, and the chemical
potential are shown to have a strong functional dependence on the initial gluon
saturation scale $Q_s$.


title: The Flavor and Spin Structure of Hyperons from Quark Fragmentation

abstract:
  We systematically study the hadron longitudinal polarizations of the octet
baryons at large $z$ from quark fragmentations in $e^+e^-$-annihilation,
polarized charged lepton deep inelastic scattering (DIS) process, and neutrino
(antineutrino) DIS process, based on predictions of quark distributions for the
octet baryons in the SU(6) quark-spectator-diquark model and a perturbative QCD
based counting rule analysis. We show that the $e^+e^-$-annihilation and
polarized charged lepton DIS process are able to distinguish between the two
different predictions of the hyperon polarizations. We also find that the
neutrino/antineutrino DIS process is ideal in order to study both the valence
content of the hyperons and the antiquark to hyperon (quark to anti-hyperon)
fragmentations, which might be related to the sea content of hyperons.


title: Low Energy Solar Neutrino Detection by using Liquid Xenon

abstract:
  Possibility to use ultra pure liquid Xenon as a low energy solar neutrino
detector by means of $\nu$+e scatterings is evaluated. A possible detector with
10 tons of fiducial volume will give $\sim$14 events for pp-neutrinos and
$\sim$6 events for $^{7}$Be neutrinos with the energy threshold at 50 keV. The
detector can be built with known and established technologies. High density of
the liquid- Xe would provide self-shields against the incoming backgrounds
originating from the container and outer environments. Internal backgrounds can
be reduced by distillation and other techniques. Purification of the liquid Xe
can be done continuously throughout the experiment. The spallation backgrounds
are estimated to be small though an experimental determination is neccessary.
The liquid-Xe detector can also provide a significantly better sensitivity for
the double beta decay and a dark matter search. However the 2$\nu$ double beta
decay of $^{136}$Xe would be most background. It could be overcome if the
2$\nu$ lifetime is longer than 10$^{22}$yr. However, an isotope separation of
$^{136}$Xe is inevitable for a shorter lifetime.
  The isotope separations would, intoroduce a new opportunity to definitively
identify dark matter. The interesting feature in addition to the solar neutrino
measurements will also be discussed.


title: Ultra High Energy Cosmic Rays and Gamma Ray Bursts from Axion Stars

abstract:
  We propose a model in which ultra high energy cosmic rays and gamma ray
bursts are produced by collisions between neutron stars and axion stars. The
acceleration of such a cosmic ray is made by the electric field, $\sim 10^{15}
(B/10^{12} {G}) {eV} {cm}^{-1}$, which is induced in an axion star by
relatively strong magnetic field $B>10^{12}$ G of a neutron star. On the other
hand, similar collisions generate gamma ray bursts when magnetic field is
relatively small, e.g. $\leq 10^{10}$ G. Assuming that the axion mass is $\sim
10^{-9}$ eV, we can explain huge energies of the gamma ray bursts $\sim
10^{54}$ erg as well as the ultra high energies of the cosmic rays $\sim
10^{20}$ eV. We estimate rate of energy release in the collisions and we find
that the rate roughly agrees with observations. In addition, we show that these
axion stars are plausible candidates for MACHOs. Since the axion star induces
oscillating electric current under the magnetic field, observable monochromatic
radiations are emitted.


title: Constraints on $\gamma$ and Strong Phases from $B\to\pi K$ Decays

abstract:
  As we pointed out recently, the neutral decays $B_d\to\pi^\mp K^\pm$ and
$B_d\to\pi^0K$ may provide non-trivial bounds on the CKM angle $\gamma$. Here
we reconsider this approach in the light of recent CLEO data, which look very
interesting. In particular, the results for the corresponding CP-averaged
branching ratios are in favour of strong constraints on $\gamma$, where the
second quadrant is preferred. Such a situation would be in conflict with the
standard analysis of the unitarity triangle. Moreover, constraints on a
CP-conserving strong phase $\delta_n$ are in favour of a negative value of
$\cos\delta_n$, which would be in conflict with the factorization expectation.
In addition, there seems to be an interesting discrepancy with the bounds that
are implied by the charged $B\to\pi K$ system: whereas these decays favour a
range for $\gamma$ that is similar to that of the neutral modes, they point
towards a positive value of $\cos\delta_c$, which would be in conflict with the
expectation of equal signs for $\cos\delta_n$ and $\cos\delta_c$.


title: About the structure of the Froissart limit in QCD

abstract:
  The Froissart asymptotic behavior of cross-sections is usually considered in
a parton picture as corresponding to the collision of two almost black disks
filled with partons. In this article we mainly concentrate on the examination
of the local transparency of such F-disks. We discuss how is it possible to
guarantee the boost-invariance of the reciprocal transparency of two such
F-disks in a process of their collision, despite the fact that the mean area of
the overlapping of these F-disks at the same impact parameter is varying with
the Lorentz frame. We argue that on will always have such problems, if the
dominant interactions at all energies remain soft, but such a trouble can be
probably avoided if the mean parton virtualities grow with energies. This last
is natural in QCD, and we use the qualitative generalization of BFKL approach
to estimate the distribution of hard partons with various virtualities inside a
F-disk. As a result, the quasiclassical partonic wave function corresponding to
the F-limit can be approximately represented by the system of enclosed
parton-gluon disks with a growing virtuality and blackness. With the increase
of energy the new disks with larger virtualities are created in the middle of
the previous disks, and then they expand with the same transverse velocity.


title: Lectures on perturbative HQET 1

abstract:
  Extended version of lectures given at the University of Karlsruhe and at
Calc-2000 school in Dubna. Properties of HQET as a field theory, methods of
calculation of HQET diagrams and some simple applications are explained in
detail. These lectures can be used as an additional chapter with any modern QCD
textbook.


title: Polarized J/psi production in deep inelastic scattering at HERA

abstract:
  We perform a calculation on the polarization of J/psi production in deep
inelastic scattering in the HERA energy range. For the inclusive production
distributions, we find that the color-singlet contributions are consistent with
the experimental data in the major region of z (z>0.4). Only in low z regions,
there are some hints of the need of the color-octet contributions to describe
the experimental data. For the polarization of J/psi in DIS processes, we find
the parameter alpha changes with Q^2. Especially, at higher Q^2, difference on
alpha between color-singlet and color-octet contributions become more
distinctive. In the two regions of lower and larger z, the polarization
parameter alpha have different features. These properties can provide important
information on the polarization mechanism for J/psi production.


title:
Color-singlet direct J/\psi and \psi' production at Tevatron in the k_t
  factorization approach

abstract:
  Direct $J/\psi$ and $\psi'$ production rates at Tevatron are calculated in
the $k_t$-factorization approach within the color-singlet model. In this
approach, the production rates are enhanced by a factor of 20 compared to the
naive collinear parton model. However, the theoretical predictions are still
below the experimental data by at least one order of magnitude. This means that
to explain charmonium productions at Tevatron, we still need to call for the
contributions from color-octet channels or other production mechanisms.


title:
CP violation in neutrino oscillations and L/E flatness of the e-like
  event ratio at Super-Kamiokande

abstract:
  We show that if the presently observed L/E-flatness of the electron-like
event ratio in the Super-Kamiokande atmospheric neutrino data is confirmed then
the indicated ratio must be {\em unity}. Further, it is found that once CP is
violated the exact L/E flatness implies: (a) The CP-violating phase, in the
standard parameterization, is narrowed down to two possibilities pm pi/2, and
(b) The mixing between the second and the third generations must be maximal.
With these results at hand, we argue that a dedicated study of the L/E-flatness
of the electron-like event ratio by Super-Kamiokande can serve as an initial
investigatory probe of CP violation in the neutrino sector. The assumptions
under which these results hold are explicitly stated.


title: Form Factors of the Nucleon in a Selfconsistent Chiral Model

abstract:
  In the present paper we extend the Schwinger model of the nucleon to the
inclusion of loop corrections. Starting from a chiral model of nucleon and
delta for the mesons $\pi,\rho$ and $A_1$ we extend our nonperturbative
sefconsistent regularisation scheme to the calculation of the nucleon form
factors. Chiral symmetry requires loops according to the interactions ${\cal
L}_{\pi\pi\rho}, {\cal L}_{\rho\rho\rho}, {\cal L}_{\rho\pi A_1}, {\cal
L}_{\rho A_1 A_1}$.The coupling constants are strictly introduced by chiral
symmetry. The use of low energy theorems and SU(3) relations allow an otherwise
parameterfree calculation of the form factors of the nucleon.


title:
Tau neutrino magnetic moments from the Super-Kamiokande and $\nu$
  e-scattering data

abstract:
  Combined results on $\nu_{\mu}\to \nu_{\tau}$ oscillations and $\nu
e$-scattering from the Super-Kamiokande and LAMPF experiments, respectively,
limit the Dirac $\nu_{\tau}$ diagonal magnetic moment to $\mu_{\nu_{\tau}} <
1.9\times 10^{-9} \mu_{B}$. For the scheme with 3 Majorana neutrinos the LAMPF
results allow the limitation of effective $\nu_{\tau}$ magnetic moment to
$\mu_{\nu_{\tau}} < 7.6 \times 10^{-10}\mu_{B}$. The moments in the scheme with
additional Majorana light sterile neutrinos as well as experiments on
stimulated radiative neutrino conversion are also discussed.


title: The GDH Sum Rule and Related Integrals

abstract:
  The spin structure of the nucleon resonance region is analyzed on the basis
of our phenomenological model MAID. Predictions are given for the
Gerasimov-Drell-Hearn sum rule as well as generalized integrals over spin
structure functions. The dependence of these integrals on momentum transfer is
studied and rigorous relationships between various definitions of generalized
Gerasimov-Drell-Hearn integrals and spin polarizabilities are derived. These
results are compared to the predictions of chiral perturbation theory and
phenomenological models.


title:
Non-perturbative calculations of a global U(1) theory at finite density
  and temperature

abstract:
  We use an optimised hopping parameter expansion for the free energy (linear
delta expansion) to study the phase transitions at finite temperature and
finite charge density in a global U(1) scalar Higgs sector on the lattice at
large lattice couplings. We are able to plot out phase diagrams in lattice
parameter space and find that the standard second-order phase transition with
temperature at zero chemical potential becomes first order as the chemical
potential increases.


title: The MSSM prediction for W+/- H-/+ production by gluon fusion

abstract:
  We discuss the associated W+/- H-/+ production in p p collision for the Large
Hadron Collider. A complete one-loop calculation of the loop-induced subprocess
g g -> W+/- H-/+ is presented in the framework of the Minimal Supersymmetric
Standard Model (MSSM), and the possible enhancement of the hadronic cross
section is investigated under the constraint from the squark direct-search
results and the low-energy precision data. Because of the large destructive
interplay in the quark-loop contributions between triangle-type and box-type
diagrams, the squark-loop contributions turn out to be comparable with the
quark-loop ones. In particular, the hadronic cross section via gluon fusion can
be extensively enhanced by squark-pair threshold effects in the box-type
diagrams, so that it can be as large as the hadronic cross section via the b
b-bar -> W+/- H-/+ subprocess which appears at tree level.


title: Small-x Processes in Perturbative Quantum Chromodynamics

abstract:
  Starting from a rewiev of DGLAP and BFKL evolution equations for small-x
processes, a sistematic study is performed in order to understand the limits of
both the formulations and to improve them in a unique framework, which aims to
cover the whole range of applicability of perturbative QCD and which describes
the transition mechanism from perturbative to non-perturbative physics in the
region where unitarity contributions are expected not to be important.


title: On the phase of the off-shell scattering amplitudes

abstract:
  We prove that the phase of the partial wave amplitude does not depend on the
off-shell 4-momentum squared of one of the scattered particles.


title: The resummed quark form factor in dimensional regularization

abstract:
  The resummed expression for the quark form factor illustrates the fact that
dimensional continuation provides a regularization not only for ultraviolet and
infrared singularities of fixed order QCD amplitudes, but also for the Landau
pole arising in resummed calculations. Explicit renormalization group invariant
analytic expressions for the logarithm of the form factor are given up to
two-loop order in the QCD beta function.


title: A Solution of the Generation Puzzle from Yang-Mills Duality

abstract:
  A solution to the generation puzzle based on a nonabelian generalization of
electric-magnetic duality is briefly reviewed. It predicts 3 and only 3
generations of fermions and explains the hierarchical mass spectrum as well as
the main features in both the quark and lepton mixing matrices. A calculation
to leading perturbative order already gives reasonable values to about half of
the Standard Model parameters.


title: Lepton Transmutations from a Rotating Mass Matrix

abstract:
  Fermion mass matrices generally rotate in generation space under scale
changes, which can lead to fermions of different generations transmuting into
one another. The effect is examined in detail and its cross-section calculated
for $\gamma + \ell_\alpha \longrightarrow \gamma + \ell_\beta$ with
$\ell_\alpha \neq \ell_\beta$ the charged leptons $e, \mu$, or $\tau$. For the
(conventional) Standard Model, this is weak and probably undetectable, though
with some notable exceptions. But for the Dualized Standard Model, which we
advocate and have already used quite successfully to explain quark mixing and
neutrino oscillation, the effect is larger and could be observable. Estimates
of transmutational decays are also given.


title: The Light-Cone Wave Function of the Pion

abstract:
  The light-cone wave function of the pion is calculated within the
Nambu-Jona-Lasinio model. The result is used to derive the pion electromagnetic
form factor, charge radius, structure function, pi-gamma transition form factor
and distribution amplitude.


title: Domain Walls in QCD

abstract:
  QCD was shown to have a nontrivial vacuum structure due to the topology of
the theta = theta+2*pi*n parameter. As a result of this nontrivial topology, in
the large N_c limit, quasi-stable QCD domain walls appear, characterized by a
transition in the singlet eta' field. We discuss the physics of these QCD
domain walls as well as related axion domain walls and we present a new type of
axion wall which also contains an eta' transition. We argue that these domain
walls are topologically stable in the limit N_c->infinity and classically
stable for large but finite N_c, however, they can decay through a tunneling
process. We argue that the qualitative features of these QCD domain walls --
namely their classical stability -- persist to the realistic case of N_c=3 and
that it is at least possible that their lifetime could be macroscopically
large. If it is, then QCD domain walls could play an important role in the
evolution of early universe and may be detectable in energetic collisions such
as those at the Relativistic Heavy Ion Collider (RHIC).


title:
Direct J/Psi hadroproduction in k_\perp-factorization and the color
  octet mechanism

abstract:
  The hadroproduction of direct J/Psi in the framework of the
k_\perp-factorization approach is studied. The color-singlet contribution is
essentially larger than in the collinear approach but is still an order of
magnitude below the data. The deficit may be well described by the color octet
contribution with the value of the matrix element <0|O^{J/\Psi}_8(^3S_1)|0>
substantially decreased in comparison with the fits in the collinear
factorization. This should lead to a reduction of the large transverse
polarization, predicted in the collinear approach.


title: Existence of the $\sigma$-meson below 1 GeV and $f_0(1500)$ glueball

abstract:
  On the basis of a simultaneous description of the isoscalar s-wave channel of
the $\pi\pi$ scattering (from the threshold up to 1.9 GeV) and of the
$\pi\pi\to K\bar{K}$ process (from the threshold to $\sim$ 1.4 GeV) in the
model-independent approach, a confirmation of the $\sigma$-meson at $\sim$ 665
MeV and an indication for the glueball nature of the $f_0(1500)$ state are
obtained. It is shown that the large $\pi\pi$-background, usually obtained,
combines, in reality, the influence of the left-hand branch-point and the
contribution of a very wide resonance at $\sim$ 665 MeV. The coupling constants
of the observed states with the $\pi\pi$ and $K\bar{K}$ systems and lengths of
the $\pi\pi$ and $K\bar{K}$ scattering are obtained.


title: Primordial Galactic Magnetic Fields from the QCD Phase Transition

abstract:
  In this paper, we propose a mechanism to generate large-scale magnetic fields
with correlations lengths of 100 kpc. Domain walls with QCD scale internal
structure form and coalesce obtaining Hubble size correlations and align
nucleon spins. Due to strong CP violation, nucleons in these walls have
anomalous electric and magnetic dipole moments and thus the walls are
ferromagnetic. This induces electromagnetic fields with Hubble size
correlations. The same CP violation also induces maximal helicity
(Chern-Simons) correlated through the Hubble volume which supports an "inverse
cascade" allowing the initial correlations to grow to 100 kpc today. We
estimate the generated electromagnetic fields in terms of the QCD parameters
and discuss the effects of the resulting fields.


title:
Estimate of the Three-Loop MS bar Contribution to sigma(W_L^+ W_L^- -->
  Z_L Z_L)

abstract:
  The three-loop contribution to the MS bar single-Higgs-doublet standard-model
cross-section $\sigma(W_L^+ W_L^- \to Z_L Z_L)$ at s = (5M_H)^2 is estimated
via least-squares matching of the asymptotic Pade-approximant prediction of the
next order term, a procedure that has been previously applied to QCD
corrections to correlation functions and decay amplitudes. In contrast to these
prior applications, the expansion parameter for the W_L^+ W_L^- \to Z_L Z_L
process is the non-asymptotically-free quartic scalar-field coupling of the
standard model, suggesting that the least-squares matching be performed over
the "infrared" mu^2 <= s region of the scale parameter. All three coefficients
of logarithms within the three-loop term obtained by such matching are found to
be within 6.6% relative error of their true values, as determined via
renormalization-group methods. Surprisingly, almost identical results are
obtained by performing the least squares matching over the mu^2 >= s region.


title: Dark Matter and Detector Cross Sections

abstract:
  We consider here the spin independent neutralino-proton cross section for a
variety of SUGRA and D-brane models with R-parity invariance. The minimum cross
section generally is >~ 1\times 10^{-(9-10)} pb (and hence accessible to future
detectors) except for special regions of parameter space where it may drop to
=~ 10^{-12} pb. In the latter case the gluino and squarks will be heavy (>~ 1
TeV).


title: Probing Light Sbottoms with B Decays

abstract:
  We discuss recently reported experimental hints for a bottom squark with mass
around 3.5 GeV decaying as sbottom -> charm + lepton + anti-sneutrino. We
correlate the sbottom lifetime with the decay rates for bottom -> sbottom +
neutrino + anti-sneutrino and bottom -> sbottom + anti-neutrino + sneutrino in
the framework of a minimal supersymmetric model extended by right-handed
(s)neutrinos. Confronting our results with the well-measured semileptonic
branching ratio of B mesons we conclude that the light sbottom interpretation
of the experimental anomalies is ruled out, unless m_bottom < m_sbottom +
m_sneutrino.


title:
Monopoles and Dyons in SU(5) Gauge Unification (with relation to a Dual
  Standard Model)

abstract:
  This article presents a fairly complete description of the monopoles and
dyons arising from an SU(5) gauge unification of the standard model. Topics
discussed include: the spectrum of SU(5) monopoles; their gauge equivalence
structure; their spherical symmetry; the construction of dyons; global charge;
the intrinsic angular momenta of scalar boson-monopole composites and monopole
gauge excitations; and the effects of a theta vacuum. The relevance of each of
these topics to constructing a dual description of the standard model with
SU(5) solitons is discussed in detail.


title: Dual Unification

abstract:
  This manuscript has been withdrawn by the author. Some of the material has
been included in the manuscript 'Dualizing the Dual Standard Model'
hep-ph/0102084.


title: Fermion transmutation - a renormalization effect in gauge theory

abstract:
  A new category of phenomena is predicted in which fermions of different
flavours can transmute into one another, for example $e \to \mu$ or $e \to
\tau$, as a consequence of the `rotating' mass matrix due to renormalization.
As examples, calculations will be presented for various such processes. Some of
these could be accessible to experiments in the near future.


title: The Quark Distributions of Baryons

abstract:
  The recent progress in the investigations on the quark structure of the
$\Lambda$ and $\Sigma$ baryons are reviewed. It is shown that the quark
structure of $\Lambda$ and $\Sigma$ hyperons can provide a new domain to test
various theories concerning the spin and flavor structure of the nucleon. The
$\Lambda$ and $\Sigma$ Physics might be new directions to explore the quark
distributions of baryons both theoretically and experimentally.


title:
Resolving the Antibaryon-Production Puzzle in High-Energy Heavy-Ion
  Collisions

abstract:
  We argue that the observed antiproton production in heavy-ion collisions at
CERN-SpS energies can be understood if (contrary to most sequential scattering
approaches) the backward direction in the process $p\bar p \leftrightarrow
\bar{n}\pi$ (with $\bar{n}$=5-6) is consistently accounted for within a thermal
framework. Employing the standard picture of subsequent chemical and thermal
freezeout, which induces an over-saturation of pion number with associated
chemical potentials of $\mu_\pi\simeq$~60-80 MeV, enhances the backward
reaction substantially. The resulting rates and corresponding cross sections
turn out to be large enough to maintain the abundance of antiprotons at
chemical freezeout until the decoupling temperature, in accord with the
measured $\bar{p}/p$ ratio in Pb(158AGeV)+Pb collisions.


title: NRQCD, Effective Field Theories and Potential Models

abstract:
  We review some recent developments on non-relativistic effective field
theories for heavy quark-antiquark systems and how they can bring a well
founded connection between QCD and potential models.


title: Inflationary preheating and primordial black holes

abstract:
  Preheating after inflation may over-produce primordial black holes (PBH's) in
many regions of parameter space. As an example we study two-field models with a
massless self-interacting inflaton, taking into account second order field and
metric backreaction effects as spatial averages. We find that a complex quilt
of parameter regions above the Gaussian PBH over-production threshold emerges
due to the enhancement of curvature perturbations on all scales. It should be
possible to constrain realistic models of inflation through PBH over-production
although many issues, such as rescattering and non-Gaussianity, remain unsolved
or unexplored.


title: Froissart-Martin bound in spaces with compact extra dimensions

abstract:
  We generalize the Froissart-Martin upper bound for the scattering amplitude
in spaces with compactified extra dimensions.


title: New Regime for Dense String Networks

abstract:
  We uncover a new transient regime that reconciles the apparent inconsistency
of the Martins Shellard one scale damped string evolution model with the
initial conditions predicted by the Kibble mechanism for string formation in a
second order phase transition. This regime carries (in a short cosmic time
$\sim .1 t_c$) the dense string network created by the Kibble {\it{mechanism}}
to the (dilute) Kibble {\it{regime}} in which friction dominated strings remain
till times $t_* \sim (M_P/T_c)^2 t_c$. This is possible beacause the cosmic
time at the phase transition ($t_c$) is much larger than the damping time scale
$l_f\sim T_c^2/T^3$. Our result has drastic implications for various non-GUT
scale string mediated mechanisms.}


title: Supersymmetric Unification at the Millenium

abstract:
  We argue that the discovery of neutrino mass effects at Super-Kamiokande
implies a clear logical chain leading from the Standard Model, through the MSSM
and the recently developed Minimal Left Right Supersymmetric models with a
renormalizable see-saw mechanism for neutrino mass, to Left Right symmetric
SUSY GUTS : in particular, SO(10) and $SU(2)_L \times SU(2)_R\times SU(4)_c$.
The progress in constructing such GUTS explicitly is reviewed and their
testability/falsifiability by lepton flavour violation and proton decay
measurements emphasized. Susy violations of the survival principle and the
interplay between third generation Yukawa coupling unification and the
structurally stable IR attractive features of the RG flow in SUSY GUTS are also
discussed .


title: Estimation of Collision Impact Parameter

abstract:
  We demonstrate that the nuclear collision geometry (i.e. impact parameter)
can be determined with 1.5 fm accuracy in an event-by-event analysis by
measuring the transverse energy flow in the pseudorapidity region $3 \le |\eta|
\le 5$ with a minimal dependence on collision dynamics details at the LHC
energy scale. Using the HIJING model we have illustrated our calculation by a
simulation of events of nucleus-nucleus interactions at the c.m.s energy from 1
up to 5.5 TeV per nucleon and various type of nuclei.


title: Theories in More than Four Dimensions

abstract:
  Particle physics models where there are large hidden extra dimensions are
currently on the focus of an intense activity. The main reason is that these
large extra dimensions may come with a TeV scale for quantum gravity (or string
theory) which leads to a plethora of new observable phenomena in colliders as
well in other areas of particle physics. Those new dimensions could be as large
as millimeters implying deviations of the Newton's law of gravity at these
scales. Intending to provide a basic introduction to this fast developing area,
we present a general overview of theories with large extra dimensions. We
center our discussion on models for neutrino masses, high dimensional
extensions of the Standard Model and gauge coupling unification. We discuss the
recently proposed technic of splitting fermion wave functions on a tick brane
which may solve the problem of a fast proton decay and produce fermion mass
hierarchies without invoking extra global symmetries. Randall-Sundrum model and
some current trends are also commented.


title: Summary of Neutrino 2000

abstract:
  Aspects of neutrino physics beyond the Standard Model are emphasized,
including the emerging default options for atmospheric and solar neutrino
oscillations, namely nu_mu to nu_tau and nu_e to nu_{mu,tau} respectively, and
the need to check them, the prospects opened up by the successful starts of SNO
and K2K, the opportunities for future long-baseline neutrino experiments and
high-energy astrophysical neutrinos. Finally, comments are made on the road map
for realizing the exciting physics potential of neutrino factories.


title: Damping of very soft moving quarks in high-temperature QCD

abstract:
  We determine the analytic expression of the damping rates for very soft
moving quarks in an expansion to second order in powers of their momentum in
the context of QCD at high temperature. The calculation is performed using the
hard-thermal-loop-summed perturbation scheme. We describe the range of validity
of the expansion and make a comparison with other calculations, particularly
those using a magnetic mass as a shield from infrared sensitivity. We discuss
the possible occurrence of infrared divergences in our results and argue that
they are due to magnetic sensitivity.


title: Maximum And Minimum Dark Matter Detection Cross Sections

abstract:
  The range of neutralino-proton cross sections for R-parity preserving
supergravity models with GUT scale unification of the gauge coupling constants
is examined. The models considered here are mSUGRA, models with non universal
soft breaking and D-brane models. It is found that the current dark matter
detectors are sampling significant parts of the SUSY parameter space and future
detectors could sample almost the entire space. The special regions of
parameter space that may be inaccessible to future detectors are seen to have a
squark/gluino spectra beyond 1 TeV, but observable at the LHC.


title: Many-Body Coulomb Gauge Exotic and Charmed Hybrids

abstract:
  Utilizing a QCD Coulomb gauge Hamiltonian with linear confinement specified
by lattice, we report a relativistic many-body calculation for the light exotic
and charmed hybrid mesons. The Hamiltonian successfully describes both quark
and gluon sectors, with vacuum and quasiparticle properties generated by a BCS
transformation and more elaborate TDA and RPA diagonalizations for the meson
($q\bar{q}$) and glueball ($gg$) masses. Hybrids entail a computationally
intense relativistic three quasiparticle ($q\bar{q}g$) calculation with the 9
dimensional Hamiltonian matrix elements evaluated variationally by Monte Carlo
techniques. Our new TDA (RPA) spectrum for the nonexotic $1^{--}$ charmed
($c\bar{c}$ and $c\bar{c}g$) system provides an explanation for the
overpopulation of the observed $J/\psi$ states. For the important $1^{-+}$
light exotic channel we obtain hybrid masses above 2 $GeV$, in broad agreement
with lattice and flux tube models, indicating that the recently observed
resonances at 1.4 and 1.6 $GeV$ are of different, perhaps four quark,
structure.


title: The Weak OPE and Dimension-eight Operators

abstract:
  We discuss recent work which identifies a potential flaw in standard
treatments of weak decay amplitudes, including that of epsilon'/epsilon. The
point is that (contrary to conventional wisdom) dimension-eight operators
contribute to weak amplitudes at order G_F alpha_s and without 1/M_W^2
suppression. The effect of dimension-eight operators is estimated to be at the
100% level in a sum rule determination of the operator Q_7^(6) at mu = 1.5 GeV,
suggesting that presently available values of mu are too low to justify the
neglect of these effects.


title: A Light Bottom Squark in the MSSM

abstract:
  We study the compatibility of a light bottom squark M_{\tilde b}< O(10 GeV)
in the unconstrained MSSM. We consider the one-loop radiative corrections which
are large for a heavy gluino (> O(150 GeV)). We then consider the
renormalization group flow up to the Grand Unified scale. For most regions of
the parameter space with a light sbottom we find colour and charge breaking
minima. Only a small window in gluino mass and tan(beta) is consistent with all
bounds. This is alleviated by a light gluino, which is however only marginally
experimentally allowed.


title:
eps'/eps in the standard model with hadronic matrix elements from the
  chiral quark model

abstract:
  I discuss the estimate of the CP-violating parameter eps'/eps based on
hadronic matrix elements computed in the chiral quark model. This estimate
suggested, before the current experimental results, that the favored value of
eps'/eps in the standard model is of the order of 10^{-3}. I briefly review the
physical effects on which this result is based and summarize current estimates.


title: Effects of Longitudinal Photons

abstract:
  The description of longitudinal photons is far from trivial, and their
phenomenological importance is largely unknown. While the cross section for
direct interactions is calculable, an even more important contribution could
come from resolved states. In the development of our model for the interactions
of (real and) virtual photons, we have modeled resolved longitudinal effects by
simple multiplicative factors on the resolved transverse-photon contributions.
Recently, a first set of parton distributions for longitudinal virtual photons
has been presented by Ch\'yla. We therefore compare their impact on some
representative distributions, relative to the simpler approaches.


title:
Lambda_c^+ production in polarized pp scattering and polarized gluon
  distribution

abstract:
  To extract information about the polarized gluon distribution, $\dg$, in the
nucleons, we propose Lambda_c^+ productions in polarized pp scattering, p +
\vec{p} \to \vec{Lambda_c^+} + X, which will be observed at RHIC experiment
starting soon. For this process, we have calculated the spin correlation
differential cross section, d\Delta \sigma/d\pt, and the spin correlation
asymmetry defined by \A_ll \equiv [ d \Delta \sigma / d \pt ] / [ d \sigma /
d\pt ]. We have found that the \A_ll is sensitive to the polarized gluon
distribution in the nucleon and thus the process is promising for testing
\Delta G(x,Q^2).


title: pi-pi interaction amplitudes with chiral constraints

abstract:
  The pi-pi interaction amplitudes have been calculated using a three coupled
channel model both with and without constraints imposed by chiral models. Roy's
equations have been used to compare the amplitudes and to study the role played
by chiral constraints in the pi-pi interaction.


title: Nucleons as chiral solitons

abstract:
  In the limit of large number of colors N the nucleon consisting of N quarks
is heavy, and one can treat it semiclassically, like the large-Z Thomas--Fermi
atom. The role of the semiclassical field binding the quarks in the nucleon is
played by the pion or chiral field; its saddle-point distribution inside the
nucleon is called the chiral soliton. The old Skyrme model for this soliton is
an over-simplification. One can do far better by exploiting a realistic and
theoretically-motivated effective chiral lagrangian presented in this paper. As
a result one gets not only the static characteristics of the nucleon in a fair
accordance with the experiment (such as masses, magnetic moments and
formfactors) but also much more detailed dynamic characteristics like numerous
parton distributions. We review the foundations of the Chiral Quark-Soliton
Model of the nucleon as well as its recent applications to parton
distributions, including the recently introduced `skewed' distributions, and to
the nucleon wave function on the light cone.


title: Scalar meson spectroscopy: achievements and traps

abstract:
  Interactions in three coupled channels: pi-pi, K-anti K and sigma-sigma have
been investigated in a wide two-pion effective mass region from the pi-pi
threshold up to 1600 MeV. Analytical structure of amplitudes in all channels
has been studied. It was shown that its knowledge is necessary to understand
spectrum of scalar mesons and their nature.


title:
Soft QCD Dynamics of Elastic Scattering in Impact Parameter
  Representation

abstract:
  The elastic hadronic amplitude is calculated using the nonperturbative
light-cone dipole representation for gluon bremsstrahlung. The data for large
mass diffraction demand a two-scale structure of light hadrons: the gluon
clouds of the valence quarks with a size of 0.3fm and the hadronic size 1fm.
The presence of the two scales unavoidably leads to a specific form for the
total hadronic cross section which consists of a steeply rising \propto
s^{\Delta} (\Delta=0.17 +/- 0.01) term related to gluon radiation, and a large
constant term originating from soft interactions which does not induce any
gluon emission. Our calculations reproduce well the total cross sections and
elastic slopes \cite{k3p}. To further test the model, we analyze the elastic pp
and ppbar differential cross sections and extract the partial amplitudes in the
impact parameter representation. The Pomeron trajectory as a function of the
impact parameter is only slightly above one for central collisions, but steeply
grows towards the periphery. The model predicts correctly the shape and energy
dependence of the partial amplitude at all impact parameters.


title: Candidates for HyperCharge Axion in Extensions of the Standard Model

abstract:
  Many theoretically well-motivated extensions of the Standard Model contain
heavy pseudoscalars that couple to hypercharge topological density. The
cosmological dynamics of such hypercharge axions could, under certain
conditions, lead to generation of a net baryon number in a sufficient amount to
explain the observed baryon asymmetry in the universe. We examine the Minimal
Supersymmetric Standard Model and string/M-theory models and determine specific
conditions which heavy axion-like pseudoscalars must satisfy to successfully
drive baryogenesis. We find that all candidates in the Minimal Supersymmetric
Standard Model fail to obey some of the constraints, and that only in special
string/M-theory models some axions may be adequate.


title: Infrared Consistency of NSVZ and DRED Supersymmetric Gluodynamics

abstract:
  Pade approximant methods are applied to known terms of the DRED beta-
function for N = 1 supersymmetric SU(3) Yang-Mills theory. Each of the [N|M]
approximants with N + M less than or equal to 4 (M not equal to zero)
constructed from this series exhibits a positive pole which precedes any zeros
of the approximant, consistent with the same infrared-attractor pole behaviour
known to characterise the exact NSVZ beta-function. A similar Pade-approximant
analysis of truncations of the NSVZ series is shown consistently to reproduce
the geometric-series pole of the exact NSVZ beta function.


title: Truncated BFKL Series and Hadronic Collisions

abstract:
  A truncated BFKL series is studied and applied to hadronic processes. The
proton-(anti)proton cross sections are described with good agreement with data
and in a way consistent with the unitarity bound. The elastic scattering
amplitude is calculated at momentum transfer $t$ different from zero,
introducing two distinct ansatze for the proton impact factor. The elastic
differential cross section is obtained at small $t$ approximation and compared
with the data.


title: Optical activity of a neutrino sea in the Standard Model

abstract:
  We present the Standard Model calculation of the optical activity of a
neutrino sea


title: Top quark total and differential cross sections at NNLO and NNLL

abstract:
  I present recent NNLO-NNLL results for top quark hadroproduction at the
Tevatron. The total cross section as well as transverse momentum and rapidity
distributions are shown.


title: Top quark production near threshold at NLC

abstract:
  In this talk we discuss the process e+e- -> t t-bar near threshold. In
particular we discuss a quark mass definition which is a generalization of the
static PS mass. The new definition allows us to calculate recoil corrections to
the static PS mass. Using this result we calculate the cross section of e+e- ->
t t-bar near threshold at NNLO accuracy adopting three alternative approaches,
namely (1) fixing the pole mass, (2) fixing the PS mass, and (3) fixing the new
mass which we call the PS-bar mass. We demonstrate that perturbative
predictions for the cross section become much more stable if we use the PS or
the PS-bar mass for the calculations. A careful analysis suggests that the top
quark mass can be extracted from a threshold scan at NLC with an accuracy of
about 100-200 MeV.


title: Photon and lepton pair production in a quark-gluon plasma

abstract: We discuss the production of real or virtual photons in a quark-gluon plasma.


title: Color Octet Contribution in Exclusive P-Wave Charmonium Decay

abstract:
  Recent advances in our understanding of the higher-wave quarkonia have
generated much interests in quarkonium physics. However most are devoted to
inclusive decays and productions. Experimental data of several two-body
exclusive decay channels of P-wave charmonia such as \pi \pi and p \bar p are
available and some have recently been re-measured by the BES collaboration. It
is not clear from the outset that color octet is needed for these exclusive
channels. Indeed only color singlet has been used in the past and reasonable
agreement with data was found. Contrary to these old results, we provide
theoretical arguments for the inclusion of color octet and perform explicit
calculations to back this up.


title: High Energy Neutrinos From Superheavy Dark Matter Annihilation

abstract:
  Superheavy ($M>10^{10}$ GeV) particles produced during inflation may be the
dark matter, independent of their interaction strength. Strongly interacting
superheavy particles will be captured by the sun, and their annihilation in the
center of the sun will produce a flux of energetic neutrinos that should be
detectable by neutrino telescopes. Depending on the particle mass, event rates
in a cubic-kilometer detector range from several per hour to several per year.
The signature of the process is a predominance of tau neutrinos, with a
relatively flat energy spectrum of events ranging from 50 GeV to many TeV, and
with the mean energy of detected tau neutrinos about 3 TeV.


title:
A Monte Carlo Study of the Dynamical-Flucautation Property of the
  Hadronic System Inside Jets

abstract:
  A study of the dynamical fluctuation property of jets is carried out using
Monte Carlo method. The results suggest that, unlike the average properties of
the hadronic system inside jets, the anisotropy of dynamical fluctuations in
these systems changes abruptly with the variation of the cut parameter $\yct$.
A transition point exists, where the dynamical fluctuations in the hadronic
system inside jet behave like those in soft hadronic collisions, i.e. being
circular in the transverse plan with repect to dynamical fluctuations. This
finding obtained from Jetset and Herwig Monte Carlo is encouraged to be checked
by experiments.


title:
A Two-Dimensional Model with Chiral Condensates and Cooper Pairs Having
  QCD-like Phase Structure

abstract:
  We describe how a generalization of the original Gross-Neveu model from U(N)
to O(N) flavor symmetry leads to the appearance of a pairing condensate at high
density, in agreement with the conjectured phenomenon of color
superconductivity in $(3+1)$-dimensional QCD. Moreover, the model displays a
rich phase structure which closely resembles the one expected in two-flavor
QCD.


title: Flavor Symmetry and Neutrino Oscillations

abstract:
  We show how the nearly bi-maximal mixing scenario comes out naturally from
gauged $SO(3)_{F}$ flavor symmetry via spontaneous symmetry breaking. An
interesting relation between the neutrino mass-squared differences and the
mixing angle, i.e., $\Delta m_{\mu e}^2 / \Delta m_{\tau\mu}^2 \simeq 2|U_{e
3}|^2 $ is obtained. The smallness of the ratio (or $|U_{e 3}|$) can also
naturally be understood from an approximate permutation symmetry. Once the
mixing element $|U_{e 3}|$ is determined, such a relation will tell us which
solution will be favored within this model. The model can also lead to
interesting phenomena on lepton-flavor violations.


title: Flavour Dynamics - Central Mysteries of the Standard Model

abstract:
  After pointing out the amazing success of the CKM description in
accommodating the phenomenology of flavour changing neutral currents I review
the status of theoretical technologies for extracting CKM parameters from data.
I sketch novel directions, namely attempts to deal with quark-hadron duality in
a (semi)quantitative way and to develop a QCD description of two-body modes of
$B$ mesons. After commenting on predictions for $\epsilon ^{\prime}/\epsilon$
and CP asymmetries in B decays I address indirect probes for New Physics in
$D^0$ oscillations and CP violation, in $K_{\mu 3}$ decays and electric dipole
moments. I describe in which way searching for New Physics in B decays provides
an exciting adventure with novel challenges not encountered before.


title: Supersymmetry versus precision experiments revisited

abstract:
  We study constraints on the Minimal Supersymmetric Standard Model from
electroweak experiments. We find that the light sfermions always make the fit
worse than the Standard Model, while the light chargino generally make the fit
slightly better through the oblique corrections. The best overall fit to the
precision measurements are found when the mass of lighter chargino is about 100
GeV and the SU(2)_L doublet sfermions are all much heavier. We find the slight
improvement of the fit over the SM, where the total \chi^2 of the fit decreases
by about one unit.


title:
Isospin symmetry breaking and direct CP violation in B -> \rho \gamma
  within and beyond the standard model

abstract:
  We discuss the isospin symmetry breaking quantity \Delta^{\pm 0} =
\Gamma(B^\pm -> \rho^\pm \gamma)/[2 \Gamma(B^0 -> \rho^0 \gamma)] - 1, and the
direct CP violation in B^\pm -> \rho^\pm \gamma within and beyond the standard
model. After showing that the leading-order calculation would be a good
approximation in such models, we argue that measurements of these quantities
would be able to disentagle physics beyond the standard model.


title: Z penguins and rare B decays

abstract:
  Rare B decays of the type $b \to s~\ell^+\ell^-(\nu\bar\nu)$ are analyzed in
a generic scenario where New Physics effects enter predominantly via $Z$
penguin contributions. We show that this possibility is both phenomenologically
allowed and well motivated on theoretical grounds. The important role played in
this context by the lepton forward-backward asymmetry in $B\to K^*\ell^+\ell^-$
is emphasized.


title:
Thermalization temperature in Pb+Pb collisions at SpS energy from hadron
  yields and midrapidity pt distributions of hadrons and direct photons

abstract:
  In the frame of 2+1 Bjorken hydrodynamics we describe simultaneously hadron
yields and midrapidity pt distributions of direct photons, unflavored, and
strange hadrons measured in Pb+Pb collisions at SpS. We find, that a reasonably
quantitative description of these data is possible only if we introduce some
radial velocity at the beginning of the one-fluid hydrodynamic stage. We fix
uniquely all parameters of this model, and estimate an initial temperature of
the just thermalized state T_{in}=(200 +40 -20) MeV in the case of EoS with
phase transition to Quark-Gluon Plasma, and T_{in}=(230 +60 -30) MeV in the
pure hadronic scenario. We conclude that SpS data considered in our study can
not distinguish between a production of QGP, and its absence.


title: Nonequilibrium Fields: Exact and Truncated Dynamics

abstract:
  The nonperturbative real-time evolution of quantum fields out of equilibrium
is often solved using a mean-field or Hartree approximation or by applying
effective action methods. In order to investigate the validity of these
truncations, we implement similar methods in classical scalar field theory and
compare the approximate dynamics with the full nonlinear evolution. Numerical
results are shown for the early-time behaviour, the role of approximate fixed
points, and thermalization.


title: Glueball as a bound state in the selfdual homogeneous vacuum gluon field

abstract:
  Using a simple relativistic QFT model of scalar fields we demonstrate that
the analytic confinement (propagator is an entire function in the complex
p^2-plane) and the weak coupling constant lead to the Regge behaviour of the
two-particle bound states. In QCD we assume that the gluon vacuum is realized
by the selfdual homogeneous classical field which is the solution of the
Yang-Mills equations. This assumption leads to analytical confinement of quarks
and gluons. We extract the colorless 0(++) two-glouon state from the QCD
generating functional in the one-gluon exchange approximation. The mass of this
bound state is defined by the Bethe-Salpeter equation. The glueball mass varies
in the region 1470{Mev} - 1600{Mev} for QCD coupling constant in the region 0.2
- 0.5 if the gluon condensate is 0.012 Gev^4.


title: Asymmetry of p(->)+p(->)->gamma+jet+X process and problem of Delta G

abstract:
  The gamma +jet production in p(->)-p(->) collisions at high energies is
studied. Double-spin asymmetry A{LL} of the process is calculated by using
Monte Carlo code SPHINX. The predictions for A{LL} of the gamma +jet production
in the p(->)-p(->) collisions using the spin-dependent gluon distributions with
positive and negative sign of $\Delta G(x,Q^2)$ are made at RHIC energies. A
possibility to extract the spin-dependent gluon distributions Delta G at STAR
experiment and to discriminate between different theoretical scenarios is
discussed.


title: MATAD: a program package for the computation of MAssive TADpoles

abstract:
  In the recent years there has been an enormous development in the evaluation
of higher order quantum corrections. An essential ingredient in the practical
calculations is provided by vacuum diagrams, i.e. integrals without external
momenta. In this paper a program package is described which can deal with one-,
two- and three-loop vacuum integrals with one non-zero mass parameter. The
principle structure is introduced and the main parts of the package are
described in detail. Explicit examples demonstrate the fields of application.


title: Light Scalars in Cosmology

abstract:
  I discuss here some of the constraints imposed by quantum and gravitational
corrections on two hypothetical excitations, axions and quintessence, which
have important cosmological implications. Although these corrections can be
kept under control, the resulting constraints are not too natural. In
particular, to keep the quintessence field light one must essentially decouple
it from ordinary matter. Some possible suggestions of how to avoid these
troubles are briefly touched upon.


title: Supersymmetry and Quantum Cosmology

abstract:
  The development of the N = 4 supersymmetric approach to quantum cosmology
based on the non-compact global O(d,d) symmetries of the effective action is
given. The N = 4 supersymmetric action whose bosonic sector is invariant under
O(d,d) is determined. A representation for supercharges is obtained and the
form of the zero and one-fermion quantum states leading to the Wheeler-DeWitt
equation is found.The development of the N = 4 supersymmetric approach to
quantum cosmology based on the non-compact global O(d,d) symmetries of the
effective action is given. The N = 4 supersymmetric action whose bosonic sector
is invariant under O(d,d) is determined. A representation for supercharges is
obtained and the form of the zero and one-fermion quantum states leading to the
Wheeler-DeWitt equation is found.


title: Obtaining the Spin of the Proton from the Spins of the Quarks

abstract:
  Employing the experimental electro-weak interactions between quarks and
leptons, the spin of the proton may easily be understood in terms of the spins
of the constituent quarks.


title: Status of theoretical B -> X_s gamma and B -> X_s l^+ l^- analyses

abstract:
  Status of the theoretical B -> X_s gamma and B -> X_s l^+ l^- analyses is
reviewed. Recently completed perturbative calculations are mentioned. The level
at which non-perturbative effects are controlled is discussed.


title:
Criticality in quark-gluon systems far beyond thermal and chemical
  equilibrium

abstract:
  Experimental evidence and theoretical arguments for the existence of
self-organized criticality in systems of gluons and quarks are presented. It is
observed that the existing data for high-transverse-momentum jet-production
exhibit striking regularities; and it is shown that, together with
first-principle considerations, such regularities can be used, not only to
probe the possible compositness of quarks, but also to obtain {\em direct
evidence} for, or against, the existence of critical temperature and/or
critical chemical potential in quark-gluon systems when hadrons are squeezed
together.


title: Two-photon reactions at high energies

abstract:
  We present a short overview over the different contributions to high energy
photon photon scattering and explore the possibilities of tuning the sizes of
the scattered objects by changing the virtuality of the photons. We compare the
experimental data with model calculations. The difficulties with inclusive
charm production are discussed.


title: $t\bar t$ cross section near the production threshold in NNLO of NRQCD

abstract:
  The cross section near the $t\bar t$ production threshold in $e^+e^-$
annihilation and $\gamma\gamma$ collisions is discussed. The NNLO results
within NRQCD are briefly overviewed.


title: Intercepts of the non-singlet structure functions

abstract:
  Infrared evolution equations for small-$x$ behaviour of the non-singlet
structure functions $f_1^{NS}$ and $g_1^{NS}$ are obtained and solved in the
next-to-leading approximation, to all orders in $\alpha_s$, and including
running $\alpha_s$ effects. The intercepts of these structure functions, i.e.
the exponents of the power-like small-$x$ behaviour, are calculated. A detailed
comparison with the leading logarithmic approximation (LLA) and DGLAP is made.
We explain why the LLA predictions for the small-$x$ dependence of the
structure functions may be more reliable than the prediction for the $Q^2$
dependence in the range of $Q^2$ explored at HERA.


title: Coherent production of hard dijets on nuclei in QCD

abstract:
  We formulate the perturbative QCD approach to coherent diffractive dijet
production in pion-nucleon and pion-nucleus collisions at high energy. For hard
dijets the Pomeron splitting mechanism in which both helicity amplitudes are
proportional to the unintegrated gluon structure function of the proton and the
pion distribution amplitude is shown to dominate. In nuclear diffraction
multiple Pomeron splitting components are found to give antishadowing
contributions at large jet momentum. To leading twist there is an exact
cancelation of effects of nuclear attenuation and antishadowing/broadening of
multiple Pomeron splitting contributions. The next-to-leading higher twist
correction driven by nuclear rescatterings is calculable in hard QCD and proves
to be numerically very large. We argue that large higher twist effects do not
preclude the determination of gross features of the pion distribution
amplitude. Our results on the atomic mass number and momentum dependence of
dijet cross sections agree well with the preliminary findings from the E791
experiment.


title:
Model-Independent Confirmation of the $\sigma$-Meson below 1 GeV and
  Indication for the $f_0(1500)$ Glueball

abstract:
  In the model-independent approach consisting in the immediate application to
the analysis of experimental data of such general principles as analyticity and
unitarity, a confirmation of the $\sigma$-meson at $\sim$ 665 MeV and an
indication for the glueball nature of the $f_0(1500)$ state are obtained on the
basis of a simultaneous description of the isoscalar s-wave channel of the
$\pi\pi$ scattering (from the threshold up to 1.9 GeV) and of the $\pi\pi\to
K\bar{K}$ process (from the threshold to $\sim$ 1.4 GeV where the 2-channel
unitarity is valid). A parameterless description of the $\pi\pi$ background is
first given by allowance for the left-hand branch-point in the proper
uniformizing variable. It is shown that the large $\pi\pi$-background, usually
obtained, combines, in reality, the influence of the left-hand branch-point and
the contribution of a very wide resonance at $\sim$ 665 MeV. The coupling
constants of the observed states with the $\pi\pi$ and $K\bar{K}$ systems and
lengths of the $\pi\pi$ and $K\bar{K}$ scattering are obtained.


title:
Neutrino Mass^2 Inferred from the Cosmic Ray Spectrum and Tritium Beta
  Decay

abstract:
  An earlier prediction of a cosmic ray neutron line right at the energy of the
knee of the cosmic ray spectrum was based on the speculation that the electron
neutrino is a tachyon whose mass is reciprocally related to the energy of the
knee, $E_k$. Given the large uncertainty in $E_k$, the values of ${m_\nu}^2$
corresponding to it are consistent with values recently reported in tritium
beta decay experiments.


title: Global and Unified Analysis of Solar Neutrino Data

abstract:
  We discuss the status of the solutions of the solar neutrino problem in terms
of oscillations of $\nu_e$ into active or sterile neutrinos. We present the
results of a global fit to the full data set corresponding to the latest data
presented at the $\nu$-2000 conference. We show the possible solutions in the
full parameter space including both MSW and vacuum, as well as quasi-vacuum
oscillations (QVO) and matter effects for mixing angles in the second octant
(the so called dark side). Our conclusion is that from the statistical point of
view, all solutions for oscillations into active neutrinos: LMA, LOW, SMA and
the QVO solutions are acceptable since they all provide a reasonable GOF to the
full data set. The same holds for the SMA solution for oscillations into
sterile neutrinos. LMA and LOW-QVO solutions for oscillations into active
neutrinos seem slightly favoured over SMA solutions for oscillations into
active or sterile neutrinos. We also analyze the dependence of these
conclusions on the uncertainty of the SSM $^8$B flux and on the removal of the
data from one of the experimental rates. We also present the results in the
framework of four neutrino oscillations which allows for oscillations into a
state which is a combination of active and sterile neutrino.


title: Enhanced Direct CP Violation in $B^{\pm} \to \rho^{0} \pi^{\pm}$

abstract:
  We study direct CP violation in the hadronic decay $B^{\pm} \to
\rho^{0}\pi^{\pm}$, including the effect of $\rho - \omega$ mixing. We find
that the CP violating asymmetry is strongly dependent on the CKM matrix
elements, especially the Wolfenstein parameter $\eta$. For fixed $N_{c}$ (the
effective parameter associated with factorization), the CP violating asymmetry,
$a$, has a maximum of order $30%-50%$ when the invariant mass of the
$\pi^{+}\pi^{-}$ pair is in the vicinity of the $\omega$ resonance. The
sensitivity of the asymmetry, $a$, to $N_{c}$ is small. Moreover, if $N_{c}$ is
constrained using the latest experimental branching ratios from the CLEO
collaboration, we find that the sign of $\sin \delta$ is always positive. Thus,
a measurement of direct CP violation in $B^{\pm} \to \rho^{0}\pi^{\pm}$ would
remove the mod$(\pi)$ ambiguity in ${\rm arg}[ -
\frac{V_{td}V_{tb}^{\star}}{V_{ud}V_{ub}^{\star}}]$.


title:
The $\mu$ and soft masses from the intermediate scale brane with
  non-factorizable geometry

abstract:
  The proton decay problem and the negative brane tension problem in the
original Randall-Sundrum model can be resolved by interpreting the Planck scale
brane as the visible sector brane. The hierarchy problem is resolved with
supersymmetry, and the TeV scales for soft masses and $\mu$ in supersymmetric
models are generated by the physics at the intermediate scale ($\sim
10^{11-13}$ GeV) brane.


title: Astrophysical neutrinos: 20th Century and Beyond

abstract:
  I summarize the first four decades of solar neutrino research and suggest
what may be possible to learn with extragalactic neutrinos and with solar
neutrinos in the next decade.

categories: hep-ph astro-ph hep-ex nucl-ex nucl-th physics.hist-ph


title: Neutrino-electron processes in a dense maqnetized plasma

abstract:
  The neutrino-electron processes in a dense strongly degenerate magnetized
plasma are analyzed in the framework of the Standard Model. The total
probability and the mean values of the neutrino energy and momentum losses are
calculated. It is shown that neutrino scattering on the excited electrons with
Landau level number conservation dominates under the conditions "mu^2 > eB >>
mu T" but does not give a contribution into the neutrino force acting on plasma
along the magnetic field.


title: Supersymmetric Microscopic Theory of the Standard Model

abstract:
  We promote the microscopic theory of standard model (MSM, hep-ph/0007077)
into supersymmetric framework in order to solve its technical aspects of vacuum
zero point energy and hierarchy problems, and attempt, further, to develop its
realistic viable minimal SUSY extension. Among other things that - the MSM
provides a natural unification of geometry and the field theory, has clarified
the physical conditions in which the geometry and particles come into being, in
microscopic sense enables an insight to key problems of particle phenomenology
and answers to some of its nagging questions - a present approach also leads to
quite a new realization of the SUSY yielding a physically realistic particle
spectrum. It stems from the special subquark algebra, from which the nilpotent
supercharge operators are derived. The resulting theory makes plausible
following testable implications for the current experiments at LEP2, at the
Tevatron and at LHC drastically different from those of the conventional MSSM
models: 1. All the sparticles and Higgs bosons never could emerge in spacetime
continuum, thus, they cannot be discovered in these experiments nor at any
energy range. 2. For each of the three SM families of quarks and leptons there
are corresponding heavy family partners with the same quantum numbers lying far
above the electroweak scale, respectively, at the energy threshold values:
$E_{1}>(419.6 \pm 12.0)GeV, \quad E_{2}= (457.6 \pm 13.2)GeV$ and $E_{3}=(521.4
\pm 15.0)GeV.$


title: Probing Anomalous Top Quark Couplings at the Future Linear Colliders

abstract:
  In terms of an effective Lagrangian we investigate the possibilities of
probing anomalous top quark couplings, $t \bar{t} H$, $\gamma t \bar{t}$, $Z t
\bar{t}$ and $tWb$ at the future linear colliders. It is found that probing
anomalous top quark couplings, $t \bar{t} H$, $\gamma t \bar{t}$, $Z t \bar{t}$
and $tWb$ at the future linear colliders. It is found that at a linear collider
with a c.m.energy $\sqrt s \sim 0.5-1.5$ TeV and a high luminosity of 10-1000
fb$^{-1}$, $e^+e^- \to t \bar{t} H$ is an ideal process in probing anomalous $t
\bar t H$ couplings. We also study in detail the effects of anomalous couplings
on $t \bar{t}$ spin correlations in the top pair production as well as the top
quark decay processes with three bases (helicity, beam line and off-diagonal
bases). Our results show that with a c. m. energy $\sqrt s \sim 0.5-1$ TeV and
a high luminosity of 1-100 fb$^{-1}$, the anomalous couplings $\gamma t
\bar{t}$, $Z t\bar{t}$ and $tWb$ may be sensitively probed.


title: Chargino Production and Decay in Photon-Photon-Collisions

abstract:
  We study the production and leptonic decay of charginos in collisions of
polarized photon beams including the complete spin correlations. The photons
can be generated by Compton backscattering of polarized laser pulses off a
polarized electron beam. Since the production process is determined alone by
the electromagnetic coupling of the charginos this process allows to study
their decay dynamics. The cross section and the forward-backward asymmetry of
the decay lepton are very sensitive to the gaugino mass parameter $M_1$ and to
the sneutrino mass without any ambiguities.


title:
Neutrino-pair emission due to electron-phonon scattering in a neutron
  star crust: a reappraisal

abstract:
  The process of $\nu \bar{\nu}$ radiation due to interaction of electrons with
phonons in the crust of a cooling neutron star is studied with the consistent
account of an electromagnetic coupling between electrons in the medium. The
wavelength of radiated neutrinos and antineutrinos is typically much larger
than the electron Debye screening distance in the medium, and therefore plasma
polarization substantially modifies the effective weak current of the electron.
Is shown, that under above conditions plasma polarization screens totally a
vector weak interaction of the electron with a neutrino field. As a result, the
$\nu \bar{\nu}$ emissivity is less in approximately 2.23 times than previously
estimated.


title:
Neutrino emission due to Cooper pairing of protons in cooling neutron
  stars: Collective effects

abstract:
  The process of neutrino-pair radiation due to formation and breaking of
Cooper pairs of protons in superconducting cores of neutron stars is considered
with taking into account of the electromagnetic coupling of protons to ambient
electrons. It is shown that plasma polarization strongly modifies the effective
vector weak current of protons. Collective response of ambient electrons to the
proton quantum transition contributes coherently to the complete interaction
with the neutrino field and enhances the rate of neutrino-pair production by
two orders of magnitude.


title: Pi Pi Scattering and Scalar Mesons in an Effective Chiral Lagrangian

abstract:
  In this talk I summarize recently proposed mechanisms to understand pi pi
scattering to 1 GeV in an effective chiral Lagrangian. The Lagrangian includes
higher resonances in addition to pions consistently with the chiral symmetry.
Iso-spin zero S-wave partial wave amplitude is reproduced up till about 1.2 GeV
by including a pion self-interaction and resonant pole exchanges of rho,
f0(980) and sigma derived from the effective chiral Lagrangian. The best fit
shows that sigma has a mass of around 560 MeV and a width of about 370 MeV.


title:
Collective neutrino-pair emission due to Cooper pairing of protons in
  superconducting neutron stars

abstract:
  The neutrino emission due to formation and breaking of Cooper pairs of
protons in superconducting cores of neutron stars is considered with taking
into account the electromagnetic coupling of protons to ambient electrons. It
is shown that collective response of electrons to the proton quantum transition
contributes coherently to the complete interaction with a neutrino field and
enhances the neutrino-pair production. Our calculation shows that the
contribution of the vector weak current to the $\nu \bar{\nu}$ emissivity of
protons is much larger than that calculated by different authors without taking
into account the plasma effects. Partial contribution of the pairing protons to
the total neutrino radiation from the neutron star core is very sensitive to
the critical temperatures for the proton and neutron pairing. We show domains
of these parameters where the neutrino radiation, caused by a singlet-state
pairing of protons is dominating.


title: Monte Carlo simulation for jet fragmentation in SUSY-QCD

abstract:
  We present results from a new Monte Carlo simulation for jet fragmentation in
QCD and SUSY QCD for large primary energies $\sqrt s$ up to $10^{16}$ GeV. In
the case of SUSY QCD the simulation takes into account not only gluons and
quarks as cascading particles, but also their supersymmetric partners. A new
model-independent hadronization scheme is developed, in which the hadronization
functions are found from LEP data. An interesting feature of SUSY QCD is the
prediction of a sizeable flux of the lightest supersymmetric particles (LSPs),
if R-parity is conserved. About 10% of the jet energy is transferred to LSPs
which, owing to their harder spectra, constitute an important part of the
spectra for large $x=E/E_{jet}$. Spectra of protons and of secondary particles,
photons and neutrinos, are also calculated. These results have implications for
the decay of superheavy particles with masses up to the GUT scale, which have
been suggested as a source of ultrahigh energy cosmic rays.


title:
Contribution of Inelastic Rescatterring to $B \to \pi \pi, K \bar{K}$
  Decays

abstract:
  We discuss multichannel inelastic rescatterring effects in B decays into a
pair $PP$ of pseudoscalar mesons ($PP = \pi \pi$ or $K\bar{K}$). In agreement
with short-distance models it is assumed that initially $B$ meson decays
dominantly into jet-like states composed of two flying-apart low-mass
resonances $M_1 M_2$ which rescatter into $PP$. Since from all S-matrix
elements $<i|S|PP>$ involving $PP$ only some ($i = M_1 M_2$) contribute to the
final state rescatterring, the latter is treated as a correction only. The
rescatterring of resonance pair $M_1 M_2$ into the final $PP$ state is assumed
to proceed through Regge exchange. Although effects due to a single
intermediate state $M_1 M_2$ are small, it is shown that the combined effect of
all such states should be large. In particular, amplitudes of B decays into
$K\bar{K}$ become significantly larger than those estimated through
short-distance penguin diagrams, to the point of being comparable to the $B\to
\pi \pi$ amplitudes.


title: QCD at Photon Colliders

abstract:
  The novel possibilities of probing the photon structure and high energy limit
of QCD at photon colliders are summarised. We discuss the photon structure
function $F_2^{\gamma}(x,Q^2)$, the gluon distribution in the photon and the
spin dependent structure function $g_1^{\gamma}(x,Q^2)$ of the photon and
emphasise advantages of the photon colliders for measuring these quantities.
The possibility of probing the QCD pomeron and odderon in $\gamma\gamma$ and $e
\gamma$ collisions is also described.


title: Color Dynamics In Phase Space: The Balescu-Lenard-Vlasov Approach

abstract:
  We propose to use the Balescu-Lenard-Vlasov (BLV) equation to describe
relativistic heavy ion collisions. We use an inter-quark Richardson's potential
consistent with the indications of Lattice QCD calculations. The color degrees
of freedom are explicitly taken into account.
  We explicitly demonstrate that the Vlasov approach alone is insufficient in
the hadronization region.
  In order to overcome this problem we prepare the initial condition for many
events using molecular dynamics with frictional cooling and a Thomas-Fermi
approximation to the Fermi motion.
  These events are averaged and propagated in time using the Vlasov approach.
The fluctuations are used to evaluate the collision term and in turn the number
of q-$\bar q$ created.


title:
Determination of the strong g-coupling and of the $\mu_{B^*B\gamma}-$
  strength from two-photon decays of heavy vector mesons

abstract:
  We describe a calculation of the two-photon decays of heavy vector-mesons,
$B^*\to B\gamma\gamma$ and $D^*\to D\gamma\gamma$, by using the ``heavy meson
chiral Lagrangian''. The decay amplitudes are expressed in terms of the strong
coupling $g$ of the Lagrangian at various powers and the strength of the
anomalous magnetic dipole $\mu_{B^*B\gamma}$ (respectively $\mu_{D^*D}\gamma$).
In the charm case we are able to express the branching ratio $\Gamma(D^{*0}\to
D^0\gamma\gamma)/\Gamma(D^{*0})$ as a function of $g$ only and we expect it to
be in the $10^{-6}-10^{-5}$ range, depending on the value of $g$. The
determination of $\mu_{B^{*0}B^{0}\gamma},\mu_{B^{*+}B^+}\gamma$ requires a
more involved analysis, including the consideration of bremsstrahlung radiation
for the $B^{*+}\to B^+\gamma\gamma$ case.


title: The Phases of QCD in Heavy Ion Collisions and Compact Stars

abstract:
  I review arguments for the existence of a critical point in the QCD phase
diagram as a function of temperature and baryon chemical potential. I describe
how heavy ion collision experiments at the SPS and RHIC can discover the
tell-tale signatures of such a critical point, thus mapping this region of the
QCD phase diagram. I then review the phenomena expected in cold dense quark
matter: color superconductivity and color-flavor locking. I close with a
snapshot of ongoing explorations of the implications of recent developments in
our understanding of cold dense quark matter for the physics of compact stars.


title: Neutrino Mixing from the CKM matrix in SUSY SO(10) \times U(2)_{F}

abstract:
  We construct a realistic model based on SUSY SO(10) with U(2) flavor
symmetry. A set of symmetric mass textures give rise to very good predictions;
15 masses and 6 mixing angles are predicted by 11 parameters. Both the vacuum
oscillation and LOW solutions are favored for the solar neutrino problem.


title: Dual QCD, Effective String Theory, And Regge Trajectories

abstract:
  We start with an effective field theory containing classical vortex solutions
and show that the fluctuations of these vortices are described by an effective
string theory. Viewed as a model for long distance QCD, this theory provides a
concrete picture of the QCD string as a fluctuating Abrikosov-Nielsen-Olesen
vortex of a dual superconductor on the border between type I and type II. We
present arguments which suggest that the action of the effective string theory
is the Nambu-Goto action, i.e. the rigidity vanishes. We then use this theory
to calculate the corrections to classical Regge trajectories due to string
fluctuations.


title: Features of phase ordering in (2+1)D-O(3) models

abstract:
  Numerical simulations of phase ordering under dissipative dynamics in a
(2+1)-dimensional 3-vector model with O(3) symmetry are reported. The energy
functional includes terms which stabilize the size of extended topological
defects. They emerge at the end of the coarsening process as particle- or
antiparticle-like structures floating in the globally aligned vacuum.
Approximate power-law growth of disoriented domains (with an exponent near 0.4)
is found to be rather insensitive to the size of the defects. An optional
filter for conservation of winding number allows to study phase ordering in
high defect-density environment which leads to large clusters of particles
surrounded by the aligned field.


title:
Gravitational Experiment Below 1 Millimeter and Comment on Shielded
  Casimir Backgrounds for Experiments in the Micron Regime

abstract:
  We present the status of an experimental test for gravitational strength
forces below 1 mm. Our experiment uses small 1 kilohertz oscillators as test
masses, with a stiff counducting shield between them to suppress backgrounds.
At the present sensitivity of approximately 1000 times gravitational strength,
we see no evidence for new forces with interaction ranges between 75 microns
and 1 mm. While the Casimir background is not expected to be significant at
this range, an extension of the shielding technique we employ may be useful for
reducing this background in experiments below a few microns. We describe a
possible implementation.


title: The Cherenkov-Compton effect in particle physics

abstract:
  The two-photon production by motion of a charged particle in a medium is
considered. This process is called Cherenkov-Compton effect because the
production of photons is calculated from the Feynman diagram for the Compton
effect in a medium. This process is not forbidden in quantum electrodynamics of
dielectric media. The cross section of his process in Mandelstam variables is
calculated for pair of photons with one moving at the opposite direction to the
electron motion and the second one inside Cherenkov cone. The opposite motion
is not caused by the collision with a particle of a medium . The relation of
this process to the CERN experiments is considered.


title:
Search for QCD-instanton-induced effects in deep inelastic electron
  proton scattering at HERA

abstract:
  After summarizing the results of QCD-instanton-perturbation theory for the
calculation of instanton-induced effects in deep inelastic electron proton
scattering, we discuss search strategies for instanton-induced effects that
have been derived for HERA-conditions using the QCDINS-Monte Carlo. Recent
results from the H1 collaboration are presented.