title:
Phenomenological studies of inclusive ep scattering at low momentum
  transfer Q^2

abstract:
  Phenomenological studies on the proton structure function F^2 have been
carried out to investigate the behavior of F^2, i.e. its x and Q^2 dependence,
in the transition from the deep-inelastic scattering region (Q^2 >> 1 GeV^2) to
the photoproduction region (Q^2 approx. 0 GeV^2). An overview of various
results of F^2 at low Q^2 is given. To quantify the behavior of F2 at low Q^2,
the derivatives dln(F^2)/dln(x) for fixed Q^2 and dF^2/dlog(Q^2) for fixed x
haven been determined and compared to expectations within the framework of
perturbative and non-perturbative QCD. Furthermore, the derivatives were
compared to results of the total inclusive diffractive cross-section and
vector-meson production. An interpretation of inclusive ep results is given in
the framework of the GVD/CDP picture with special emphasis on the limit of Q^2
--> 0 for fixed W^2 and x --> for fixed Q^2.


title:
The Implications of $\bar{\nu}_e e^-\to W^-\gamma$ for the Detection of
  High-Energy $\bar{\nu}_e$

abstract:
  We discuss some motivations for detecting high-energy neutrinos through the
pure electroweak processes such as $\bar{\nu}_e e^-\to W^- $ and $\bar{\nu}_e
e^-\to W^-\gamma$. We argue that the latter process can be viewed as an
enhancement to the former one. The event-rate enhancement is estimated.


title:
Photoproduction of J/psi mesons at high energies in parton model and
  k_t-faktorization approach

abstract:
  We consider J/psi meson photoproduction on protons at high energies at the
leading order in alpha_s using conventional parton model and k_t-factorization
approach of QCD. It is shown that in the both cases the colour singlet
mechanism gives correct description for experimental data from HERA for the
total cross section and for the J/psi meson z-spectrum at realistic values of a
c-quark mass and meson wave function at the origin Psi (0). At the same time
our predictions for p_t-spectrum of J/psi meson and for p_t dependence of the
spin parameter alpha obtained in k_t-factorization approach are very different
from the results obtained in conventional parton model. Such a way the
experimental study of a polarized J/psi meson production at the large p_t
should be a direct test of BFKL gluons.


title:
A quasiparticle description of the equation of state in SU(3) lattice
  QCD

abstract:
  The lattice data for $N_f=2$ and $N_f=3$ based on staggered fermion
formulations have been parameterized using a phenomenological equation of state
for noninteracting but massive quasiparticles. Such a model would be a
preferable starting point for phenomenological hadronization models and for a
description of the strongly interacting matter near the phase transition.


title: Spinodal decomposition: An alternate mechanism of phase conversion

abstract:
  The scenario of homogeneous nucleation is investigated for a first order
quark-hadron phase transition in a rapidly expanding background of quark gluon
plasma. It is found that significant supercooling is possible before
hadronization begins. This study also suggests that spinodal decomposition
competes with nucleation and may provide an alternative mechanism for phase
conversion.


title:
Disentangling positivity constraints for generalized parton
  distributions

abstract:
  Positivity constraints are derived for the generalized parton distributions
(GPDs) of spin-1/2 hadrons. The analysis covers the full set of eight twist-2
GPDs. Several new inequalities are obtained which constrain GPDs by various
combinations of usual (forward) unpolarized and polarized parton distributions
including the transversity distribution.


title:
Implications of recent solar neutrino observations: an analysis of
  charged current data

abstract:
  We have analysed the recent results from the observation of charged current
\nu_e d \to e^- p p events from solar neutrinos by the Sudbury Neutrino
Observatory SNO assuming neutrino oscillations with three active flavours. The
data seem to prefer a low mass-squared difference and large mixing angle
solution (the so-called LOW solution) in (12) parameter space. However, when
combined with the Gallium charged current interaction data from Gallex and GNO,
distinct (1\sigma) allowed regions corresponding to the large mixing angle
(LMA) and small mixing angle (SMA) appear while the LOW solution is disfavoured
upto 3\sigma standard deviation. The physical electron neutrino survival
probability corresponding to these best fit solutions are then determined and
analysed for their energy dependence.


title: Heavy Majorana neutrinos at a very large electron-proton collider

abstract:
  We study the discovery potential for detecting new neutral heavy Majorana
leptons as suggested by some extentions of the Standard Model in recently
proposed electron-proton colliders. Since 1998-1999 the option of an
electron-proton collider for the Very Large Hadron Collider at Fermilab
operating with the proton booster has been considered. We study the reaction
$e^{-}p \longrightarrow e^{+}+ jets$ and present estimates for the signal and
Standard Model background including hadronization.


title: Electromagnetic Corrections to Charged Pion Scattering at Low Energies

abstract:
  The electromagnetic corrections to the low energy scattering amplitude
involving charged pions only are investigated at leading and next-to-leading
orders in the two-flavour chiral expansion. As an application, the
corresponding variation in the strong $2S-2P$ level shift is evaluated. The
relative variation is of the order of 5%.


title: Spontaneous symmetry breaking and the $p \to 0$ limit

abstract:
  We point out a basic ambiguity in the $p \to 0$ limit of the connected
propagator in a spontaneously broken phase. This may represent an indication
that the conventional singlet Higgs boson, rather than being a purely massive
field, might have a gap-less branch. This would dominate the energy spectrum
for ${\bf{p}} \to 0$ and give rise to a very weak, long-range force. The
natural interpretation is in terms of density fluctuations of the `Higgs
condensate': in the region of very long wavelengths, infinitely larger than the
Fermi scale, it cannot be treated as a purely classical c-number field.


title: Progress in QCD next-to-leading order calculations

abstract:
  I review progress related to the calculation of QCD jet cross sections at the
NLO accuracy. After a short introduction into the theory of NLO calculations, I
discuss two recent developments: the calculation of two- and three-jet
leptoproduction at the NLO accuracy and the extension of the dipole subtraction
method for computing NLO corrections for processes involving massive partons.


title:
The Dipole Formalism for Next-to-Leading Order QCD Calculations with
  Massive Partons

abstract:
  The dipole subtraction method for calculating next-to-leading order
corrections in QCD was originally only formulated for massless partons. In this
paper we extend its definition to include massive partons, namely quarks,
squarks and gluinos. We pay particular attention to the quasi-collinear region,
which gives rise to terms that are enhanced by logarithms of the parton masses,
M. By ensuring that our subtraction cross section matches the exact real cross
section in all quasi-collinear regions we achieve uniform convergence both for
hard scales Q ~= M and Q >> M. Moreover, taking the masses to zero, we exactly
reproduce the previously-calculated massless results. We give all the
analytical formulae necessary to construct a numerical program to evaluate the
next-to-leading order QCD corrections to arbitrary observables in an arbitrary
process.


title:
Analytic Form Factors of Hydrogenlike Atoms for Discrete-Continuum
  Transitions. II. General Case

abstract:
  A general formula for bound-continuous transition form factors is derived. It
is shown that these form factors can be represented in the form of finite sum
of terms with simple analytical structure.


title: Tensor forces and relativistic corrections in quarkonium

abstract:
  The influence of tensor forces on hyperfine splitting and decay widths of
mesons are investigated within the limits of quasirelativistic potential quark
model. As the starting the system of the Rarita-Schwinger equations is used. We
use a potential motivated by QCD with a mixed Lorentz structure.


title: Atomic Probes of Noncommutative Field Theory

abstract:
  We consider the role of Lorentz symmetry in noncommutative field theory. We
find that a Lorentz-violating standard-model extension involving ordinary
fields is general enough to include any realisitc noncommutative field theory
as a subset. This leads to various theoretical consequences, as well as bounds
from existing experiments at the level of (10 TeV)$^{-2}$ on the scale of the
noncommutativity parameter.


title: A Statistical Analysis of Hadron Spectrum: Quantum Chaos in Hadrons

abstract:
  The nearest-neighbor mass-spacing distribution of the meson and baryon
spectrum (up to 2.5 GeV) is described by the Wigner surmise corresponding to
the statistics of the Gaussian orthogonal ensemble of random matrix theory.
This can be viewed as a manifestation of quantum chaos in hadrons.


title: Polarized Parton Distributions and the Polarized Gluon Asymmetry

abstract:
  The flavor-dependent valence, sea quark and antiquark spin distributions can
be determined separately from theoretical assumptions and experimental data. We
have determined the valence distributions using the Bjorken sum rule and have
extracted polarized sea distributions, assuming that the quarks and anti-quarks
for each flavor are symmetric. Other experiments have been proposed which will
allow us to completely break the SU(3) symmetry of the sea flavors. To create a
physical model for the polarized gluons, we investigate the gluon spin
asymmetry in a proton, $A_G(x,Q^2)={{\Delta G(x,Q^2)}\over {G(x,Q^2)}}$. By
assuming that htis is is approximately $Q^2$ invariant, we can completely
determine the $x$-dependence of this asymmetry, which satisfies constituent
counting rules and reproduces the basic results of the Bremsstrahlung model
originated by Close and Sivers. This asymmetry can be combined with the
measured unpolarized gluon density, $G(x,Q^2)$ to provide a prediction for
$\Delta G(x,Q^2)$. Existing and proposed experiments can test both the
prediction of scale-invariance for $A_G(x,Q^2)$ and the nature of $\Delta G$
itself. These models will be discussed along with suggestions for specific
experiments which can be performed at energies typical of HERA, RHIC and LHC to
determine these polarized distributions.


title:
Seasonal Variations of the Effect from Solar Neutrinos in Lithium
  Detector

abstract:
  The presence of two monochromatic lines of approximately equal intensity:
$^{7}$Be- and pep-neutrinos in the sensitivity plot of lithium detector makes
the pattern of the seasonal variations of the effect from solar neutrinos very
characteristic in case if the long-wave vacuum oscillations are realized. This
can give the very high accuracy in the measurement of the parameters of
neutrino oscillations especially if combined with the results obtained by the
detector sensitive mainly to $^{7}$Be-line like BOREXINO or KamLAND.


title: Radiative Decays of Excited Vector Mesons

abstract:
  Radiative decays of the $1^3S_1$ radial and $1^3D_1$ orbital excitations of
the $\rho$, $\omega$ and $\phi$ are calculated in the quark model, using wave
functions obtained variationally from the Hamiltonian with standard quark-model
parameters. The larger radiative widths should be measurable at new
high-intensity facilities being proposed, and in some cases may be measurable
in data from existing experiments. The radiative decays are a strong
discriminator between the $1^3S_1$ and $1^3D_1$ excitations, and can also be
used to provide unique information about the decay products.


title: Mixing of Pseudoscalar Mesons

abstract:
  Eta-eta' mixing is discussed in the quark-flavor basis with the hypothesis
that the decay constants follow the pattern of particle state mixing. On
exploiting the divergences of the axial vector currents - which embody the
axial vector anomaly - all mixing parameters are fixed to first order of flavor
symmetry breaking. An alternative set of parameters is obtained from a
phenomenological analysis. We also discuss mixing in the octet-singlet basis
and show how the relevant mixing parameters are related to those in the
quark-flavor basis. The dependence of the mixing parameters on the strength of
the anomaly and the amount of flavor symmetry breaking is investigated.
Finally, we present a few applications of the quark-flavor mixing scheme, such
as radiative decays of vector mesons, the photon-pseudoscalar meson transition
form factors, the coupling constants of eta and eta' to nucleons, and the
isospin-singlet admixtures to the pi^0 meson.


title: CP Violation beyond the Standard Model

abstract:
  In this talk a number of broad issues are raised about the origins of CP
violation and how to test the ideas.


title:
On possible lower bounds for the direct detection rate of SUSY Dark
  Matter

abstract:
  One can expect accessible lower bounds for dark matter detection rate due to
restrictions on masses of the SUSY-partners. To explore this correlation one
needs a new-generation large-mass detector. The absolute lower bound for
detection rate can naturally be due to spin-dependent interaction. Aimed at
detecting dark matter with sensitivity higher than $10^{-5}$ event/day/kg an
experiment should have a non-zero-spin target. Perhaps, the best is to create a
GENIUS-like detector with both Ge-73 (high spin) and Ge-76 nuclei.


title: Determination of the longitudinal structure function $F_{L}$ at HERA

abstract:
  Recent results from the HERA experiment H1 on the longitudinal stucture
function $F_{L}$ of the proton are presented. They include proton structure
function analyses with particular emphasis on those kinematic regions which are
sensitive to $F_{L}$. All results can be consistently described within the
framework of perturbative QCD.


title:
Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a
  Fireball

abstract:
  We calculate dilepton production rates from a fireball adapted to the
kinematical conditions realized in ultrarelativistic heavy ion collisions over
a broad range of beam energies. The freeze-out state of the fireball is fixed
by hadronic observables. We use this information combined with the initial
geometry of the collision region to follow the space-time evolution of the
fireball. Assuming entropy conservation, its bulk thermodynamic properties can
then be uniquely obtained once the equation of state (EoS) is specified. The
high-temperature (QGP) phase is modelled by a non-perturbative quasiparticle
model that incorporates a phenomenological confinement description, adapted to
lattice QCD results. For the hadronic phase, we interpolate the EoS into the
region where a resonance gas approach seems applicable, keeping track of a
possible overpopulation of the pion phase space. In this way, the fireball
evolution is specified without reference to dilepton data, thus eliminating it
as an adjustable parameter in the rate calculations. Dilepton emission in the
QGP phase is then calculated within the quasiparticle model. In the hadronic
phase, both temperature and finite baryon density effects on the photon
spectral function are incorporated. Existing dilepton data from CERES at 158
and 40 AGeV Pb-Au collisions are well described, and a prediction for the
PHENIX setup at RHIC for sqrt(s) = 200 AGeV is given.


title: On the B -> X_s l^+ l^- decays in general supersymmetric models

abstract:
  We analyze the inclusive semileptonic decays B -> X_s l^+ l^- in the
framework of the supersymmetric standard model with non-universal soft-breaking
terms at GUT scale. We show that the general trend of universal and
non-universal models is a decreasing of branching ratio (BR) and increasing of
energy asymmetry (AS). However, only non--universal models can have chances to
get very large enhancements in BR and AS, corresponding to large (negative)
SUSY contributions to the b -> s \gamma amplitude.


title:
A combined analysis of all data on $\nu$ and $\bar{\nu}$ induced
  single-charm production

abstract:
  Neutrino and anti-neutrino induced single-charm production are particularly
interesting to study the strange-quark parton distribution function and the
threshold effect in the cross-section, associated with the heavy quark
production. Over the past 30 years, many experiments have carried out these
studies with complementary techniques: calorimetry, bubble chambers and nuclear
emulsions. In this paper, we review these data and combine them statistically
to extract a world averaged single-charm production cross-section for both
neutrino and anti-neutrino.


title: States of Strongly Interacting Matter

abstract:
  I discuss the phase structure of strongly interacting matter at high
temperatures and densities, as predicted by statistical QCD, and consider in
particular the nature of the transition of hot hadronic matter to a plasma of
deconfined quarks and gluons.


title: Leptogenesis and low energy observables in left-right symmetric models

abstract:
  In the context of left-right symmetric models we study the connection of
leptogenesis and low energy parameters such as neutrinoless double beta decay
and leptonic CP violation. Upon imposition of a unitarity constraint, the
neutrino parameters are significantly restricted and the Majorana phases are
determined within a narrow range, depending on the kind of solar solution. One
of the Majorana phases gets determined to a good accuracy and thereby the
second phase can be probed from the results of neutrinoless double beta decay
experiments. We examine the contributions of the solar and atmospheric mass
squared differences to the asymmetry and find that in general the solar scale
dominates. In order to let the atmospheric scale dominate, some finetuning
between one of the Majorana phases and the Dirac CP phase is required. In this
case, one of the Majorana phases is determined by the amount of CP violation in
oscillation experiments.


title:
Anomalous Production of Omega and AntiOmega is Evidence for the
  Formation of Disoriented Chiral Condensates?

abstract:
  No conventional picture of nucleus-nucleus collisions has yet been able to
explain the abundance of Omega and AntiOmega hadrons in central collisions
between Pb nuclei at 158 A GeV at the CERN SPS. We argue that this is evidence
that they are produced from topological defects in the form of skyrmions
arising from the formation of disoriented chiral condensates. It is shown that
the excess Omega or AntiOmega produced could not be easily washed out in the
hadronic medium and therefore would survive in the final state.


title: Higgs Boson Production in Hadron-Hadron Colliders

abstract:
  In this work we seek to compute precisely the rate at which these Higgs
particles are produced as a function of the transverse momentum and the
rapidity at the Large Hadron Collider. This calculation is carried out to next
leading order in the QCD strong coupling $\alpha_s$. In particular, this
calculation includes the dominant gluon-initiated mechanism, which is
responsible for the majority of the cross section. We work in the infinite top
mass approximation, and argue that this is very precise in the domain of
applicability.


title:
The exclusive $B\to \pi \ell^+ \ell^-$ and $B\to \rho \ell^+ \ell^-$
  decays in the general two Higgs doublet model

abstract:
  We study the differential branching ratio, branching ratio and the
forward-backward asymmetry for the exclusive $B \to \pi \ell^+ \ell^-$ and $B
\to \rho \ell^+ \ell^-$ decays in the general two Higgs doublet model including
the neutral Higgs boson effects. We analyze the dependencies of these
quantities on the neutral Higgs boson contributions and the other model
parameters. We observe that two Higgs doublet model with the neutral Higgs
boson exchanges gives quite sizable contributions to these observables for both
channels we consider. Since the neutral Higgs boson exchanges are the only
source of the forward-backward asymmetry for $B \to \pi \tau^+ \tau^-$ decay,
which is at the order of magnitude $1-10%$, measurement of this observable is
promising to determine the neutral Higgs boson effects.


title: Localized Fermions and Anomaly Inflow via Deconstruction

abstract:
  We study fermion localization in gauge theory space. We consider four
dimensional product gauge groups in which light chiral fermions transform under
different gauge factors of the product group. This construction provides a
suppression of higher dimensional operators. For example, it can be used to
suppress dangerous proton decay operators. The anomalies associated with the
light chiral fermions are compensated by Wess-Zumino terms, which in the
continuum limit reproduce the five dimensional Chern-Simons term.


title:
Negative strange quark chemical potential. A concise, well defined
  indication of the quark-deconfinement phase transition

abstract:
  We have studied the variation of a thermodynamic quantity, the strange
chemical potential, in the phase diagram of nuclear matter, by employing the
partition function in each domain and enforcing strangeness conservation. We
propose that the change in the sign of the strange quark chemical potential,
from positive in the hadronic phase to negative in the deconfined quark-gluon
phase, to be a new, unique, concise and well-defined indication of the
quark-deconfinement phase transition in nuclear matter. This signature is
independent of model parameters and interaction mechanisms. We propose also
that, for a state in the deconfined region following an isentropic path to
hadronization via a second order phase trasition, the fugacities of the
equilibrated quark flavours, once fixed in the primordial state, remain
constant throughout the hadronization process. This would enable the knowledge
of the thermodynamic quantities of states situated beyond the hadronic phase.
Data from nucleu-nucleus interactions at AGS and SPS give support to our
proposals.


title:
Evolution of Structure Functions And Their Moments In Chiral Field
  Theory

abstract:
  Evolution of structure functions and their moments at low and moderate $Q^2$
is studied in the chiral field theory. Evolution equations based on
perturbation expansion in the coupling constant of the effective theory are
derived and solved for the moments. The kernels of evolution arising from
different processes have been calculated with contributions from direct and
cross channels, the interference terms being non-negligible in the kinematic
regions under consideration. This is shown to lead to flavor-dependence of the
kernels which manifests in observable effects. The invalidity of the
probabilistic approach to the evolution process is also pointed out.


title:
Anisotropy Parameters for the Effective Description of Crystalline Color
  Superconductors

abstract:
  In the high density low temperature limit, Quantum Chromodynamics (QCD)
exhibits a transition to a phase characterized by color superconductivity and
by energy gaps in the fermion spectra. Under specific circumstances the gap
parameter has a crystalline pattern, breaking translational and rotational
invariance. The corresponding phase is the the crystalline color
superconductive phase (or {\it LOFF} phase). In the effective theory the
fermions couple to the phonon arising from the breaking of rotation and
translation invariance. We compute the parameters of the low energy effective
lagrangian describing the motion of the free phonon in the high density medium
and derive the phonon dispersion law.


title:
Can Van Hove singularities be observed in relativistic heavy-ion
  collisions ?

abstract:
  Based on general arguments the in-medium quark propagator in a quark-gluon
plasma leads to a quark dispersion relation consisting of two branches, of
which one exhibits a minimum at some finite momentum. This results in a
vanishing group velocity for collective quark modes. Important quantities such
as the production rate of low mass lepton pairs and mesonic correlators depend
inversely on this group velocity. Therefore these quantities, which follow from
self energy diagrams containing a quark loop, are strongly affected by Van Hove
singularities (peaks and gaps). If these sharp structures could be observed in
relativistic heavy-ion collisions it would reveal the physical picture of the
QGP as a gas of quasiparticles.


title: Double-spin cos(phi) Asymmetry in Semi-inclusive Electroproduction

abstract:
  We consider the double-spin cos(phi) asymmetry for pion electroproduction in
semi-inclusive deep inelastic scattering of longitudinally polarized leptons
off longitudinally polarized protons. We estimate the size of the asymmetry in
the approximation where all twist-3 interaction-dependent distribution and
fragmentation functions are set to zero. In that approximation at HERMES
kinematics a sizable negative cos(phi) double-spin asymmetry for pi+
electroproduction is predicted.


title: Pomeron exchange and t-dependence of the scattering amplitude

abstract:
  Constraints on the t-dependence of the hadronic scattering amplitude at
asymptotic energies are derived by considering the exchange of the Pomeron, as
a Regge pole, between off-shell gluons. Covariant reggeization ensures pure
spin alpha exchange, where alpha is the Regge trajectory of the Pomeron. The
structure of the amplitude, as a function of t, has been derived without a
specific choice for the partonic wave functions of the hadrons. New terms
appear, with respect to the standard approach, and allow to describe non
trivial properties of the diffraction cone in agreement with experimental data,
as shown in a specific example.


title: Time Reversal Invariance and the Transverse Spin Structure of Hadrons

abstract:
  The role of time reversal invariance in the phenomenology of transverse spin
is discussed.


title: Classical Analogue Models for T and CPT Violation

abstract:
  Classical-mechanical oscillating systems are analyzed to model CP violating
neutral kaon oscillations. Through the identification of the key features of
the quantum effective hamiltonian we search for similarities in the
characteristic matrix of the classical systems. Some no-go results are found
for undamped systems and for systems using two one-dimensional coupled
oscillators. A model is presented emulating both T and spontaneous CPT
violation.


title: Azimuthal Asymmetries in Inclusive Single Pion Electroproduction

abstract:
  The leading and sub-leading order results for pion electroproduction in
polarized and unpolarized semi-inclusive deep-inelastic scattering, are
considered putting emphasis on transverse momentum dependent effects appearing
in azimuthal asymmetries. In particular the spin-dependent (single, double) and
spin-independent asymmetries of the distributions in the azimuthal angle of the
pion related to the lepton scattering plane are discussed.


title: Constraints on quark energy loss from Drell-Yan data

abstract:
  A leading-order analysis of E866/NuSea and NA3 Drell-Yan data in nuclei is
carried out. At Fermilab energy, the large uncertainties in the amount of sea
quark shadowing prohibit clarifying the origin of the nuclear dependence
observed experimentally. On the other hand, the small shadowing contribution to
the Drell-Yan process in pi- A collisions at SPS allows one to set tight
constraints on the energy loss of fast quarks in nuclear matter. We find the
transport coefficient to be q = 0.24+/-0.18 GeV/fm^2 that corresponds to a mean
energy loss per unit length -dE/dz = 0.20+/-0.15 GeV/fm for E > 50 GeV quarks
in a large (A=200) nucleus.


title:
Semi-classical calculation of the number of photons emitted by a
  relativistic neutrino with mass and magnetic moment passing through a
  transverse magnetic field

abstract:
  A classical calculation, modified by Compton-recoil kinematics, of the
radiation emitted by a relativistic neutrino with mass and a magnetic moment
passing through a transverse magnetic field. The calculation is performed in
the neutrinos rest frame by the method of virtual quanta. The total number N of
virtual quanta scattered by the neutrino is determined. The semi-classical
result for the analog of the Klein-Nishina formula is compared with a QED
calculation of the photon scattering cross section. The different angular
distributions, both strongly peaked, lead to a factor of two difference between
the QED and semi-classical results for N.


title: Open Questions in High Energy Spin Physics

abstract:
  I describe a few of the most exciting open questions in high energy spin
physics. After a brief look at (g-2)_\mu and the muon electric dipole moment, I
concentrate on QCD spin physics. Pressing questions include the interpretation
of new asymmetries seen in semi-inclusive DIS, measuring the polarized gluon
and quark transversity distributions in the nucleon, testing the DHGHY Sum
Rule, measuring the orbital angular momentum in the nucleon, and many others
which go beyond the space and time allotted for this talk.


title: LMA parameters and non-zero $U_{e3}$ effects on atmospheric $\nu$ data?

abstract:
  We study the possible manifestation of the interference between the effects
produced in the atmospheric neutrinos due to oscillation driven by the solar
parameters parameters $\Delta m^2_{21}$, $\sin^2 2\theta_{21}$ and due to
oscillation driven by $U_{e3}$.


title: Minimum Bias Legacy of Search Results

abstract:
  The end of LEP and SLC is a good moment to review the way to summarize search
results in order to exploit at best, in future analyses and speculations, the
pieces of information coming from all experiments. Some known problems with the
usual way of reporting results in terms ``CL limits'' are shortly recalled, and
a plea is formulated to publish just parametrized likelihoods, possibly
rescaled to the asymptotic insensitivity limit level.


title: B Physics at the Tevatron: Run II and Beyond

abstract:
  This report provides a comprehensive overview of the prospects for B physics
at the Tevatron. The work was carried out during a series of workshops starting
in September 1999. There were four working groups: 1) CP Violation, 2) Rare and
Semileptonic Decays, 3) Mixing and Lifetimes, 4) Production, Fragmentation and
Spectroscopy. The report also includes introductory chapters on theoretical and
experimental tools emphasizing aspects of B physics specific to hadron
colliders, as well as overviews of the CDF, D0, and BTeV detectors, and a
Summary.


title:
The Study of Triple Gauge Boson Anomalous Interactions via Process
  e\gamma\to W\nu. Leptonic W Decay Mode

abstract:
  We study possibilities to measure the triple anomalous W-boson couplings to
photon in the $e\gamma\to W\nu$ process via its lepton decay channel (with the
simplest signature). We found that in the study of the $W$ quadruple momentum
$\lambda$ one can limit himself within a small region in phase space. A way to
find this region is proposed. The obtained estimates for $\lambda$ at TESLA
project are roughly twice better than anticipated for $e+e-$ mode. For $W$
anomalous magnetic momentum the discussed mode gives no improvements as
compared $e+e-$ mode.


title:
A Model for the Effective Potential of Thermalized Pure SU(Large N)
  Gauge Theory

abstract:
  Based on the (in part verified) ideas of a dynamical ``abelian-ization'' and
subsequent ``center-ization'' of pure SU($N$) gauge theory an effective
potential for relevant field variables is constructed in the limit of large N.
To do this the theory is assumed to be thermalized and to be gravitationally
deformed. BPS saturation in the dynamics of the monopole field is shown to lead
to a suppression of the back reaction due to classical gravity. The classical,
effective description of the gauge theory can be justified for both the regime
of maximal abelian gauge symmetry and the center symmetric phase.


title:
Analysis of hadron production in nucleus-nucleus interactions up to and
  out of kinematical limit of free NN-collisions in the frame of FRITIOF model

abstract:
  In the framework of the modified FRITIOF model, the inclusive spectra of the
cumulative $\pi ^0$-, $\pi ^- $-mesons and protons produced in the
nucleus-nucleus interactions at 4.5 GeV/c/nucleon and 4.2 GeV/c/nucleon are
calculated. It is shown that the model reproduces qualitatively, and in some
cases quantitatively the main experimental regularities of $\pi$-mesons
production, and "soft" part of the proton spectra. According to the model the
production of the cumulative particles is connected with the mechanism of the
"soft" nucleon-nucleon interaction.


title: Results and Techniques of Multi-Loop Calculations

abstract:
  In this review some recent multi-loop results obtained in the framework of
perturbative Quantum Chromodynamics (QCD) and Quantum Electrodynamics (QED) are
discussed. After reviewing the most advanced techniques used for the
computation of renormalization group functions, we consider the decoupling of
heavy quarks. In particular, an effective method for the evaluation of the
decoupling constants is presented and explicit results are given. Furthermore
the connection to observables involving a scalar Higgs boson is worked out in
detail. We review the radiative corrections of a Higgs boson into gluons and
quarks and present explicit results up to order $\alpha_s^4$ and $\alpha_s^3$,
respectively. In this review special emphasis is put on the applications of
asymptotic expansions. A method is described which combines expansion terms of
different kinematical regions with the help of conformal mapping and Pad\'e
approximation. This method allows us to proceed beyond the present scope of
exact multi-loop calculations. As far as physical processes are concerned, we
review the computation of three-loop current correlators in QCD taking into
account the full mass-dependence. In a further application four-loop diagrams
are considered which contribute to the order $\alpha^2$ QED corrections to the
$\mu$ decay. Finally the calculation of the three-loop relation between the
$\bar{\rm MS}$ and on-shell quark mass definitions is presented. To complete
the presentation, some technical details are presented in the Appendix, where
also explicit analytical results are listed.


title: Transverse Lambda polarization in inclusive processes

abstract:
  A formalism proposed to study transverse Lambda polarization in unpolarized
hadronic processes, based on a generalized pQCD factorization theorem, is
extended to semi-inclusive DIS. Analytical expressions and examples of
numerical estimates are given.


title: Electroweak radiative corrections at high energies

abstract:
  This PhD thesis is concerned with one-loop virtual electroweak corrections to
arbitrary processes in the high-energy limit. Complete results are presented
for the leading and subleading logarithms of large ratios of energy scales to
mass scales. These results include the logarithmic dependence on the photon and
weak-boson masses, on the light-fermion masses, as well as on the Higgs- and
top-masses in the heavy-Higgs and heavy-top limit.
  All sources of electroweak logarithmic corrections are taken into account,
including the exchange of soft and/or collinear electroweak gauge bosons as
well as the renormalization-group running of the gauge, scalar and Yukawa
couplings.
  The logarithmic corrections are derived in a process-independent way,
resulting in simple analytic formulas that apply to arbitrary electroweak
processes that are not mass-suppressed in the high-energy limit. We also
present analytical and numerical applications for the processes: e^+e^- \to
f\bar{f}, e^+ e^- \to W^+W^-, ZZ, Z\gamma, \gamma\gamma and \bar{d}u \to W^+Z,
W^+\gamma.


title: Chiral dynamics with strange quarks: Mysteries and opportunities

abstract:
  Recent developments and open issues in chiral dynamics with strange quarks
are reviewed. Topics include: Order parameters of chiral symmetry breaking, the
flavor dependence of these order parameters, speculations about the phase
structure of QCD with varying number of flavors, OZI violation and its natural
emergence in case of a small strange quark condensate, heavy kaon chiral
perturbation theory, an update on pion-pion, pion-kaon and pion-nucleon sigma
terms, the dynamics and nature of scalar mesons, the role of the scalar pion
and kaon form factors, attempts to describe some strange baryons employing
coupled channel dynamics tied to unitarity and chiral perturbation theory, and
the role of final state interactions in Goldstone boson pair production in
proton-proton collisions.


title: The K/pi ratio from condensed Polyakov loops

abstract:
  We perform a field-theoretical computation of hadron production in large
systems at the QCD confinement phase transition associated with restoration of
the Z(3) global symmetry. This occurs from the decay of a condensate for the
Polyakov loop. From the effective potential for the Polyakov loop, its mass
just below the confinement temperature T_c is in between the vacuum masses of
the pion and that of the kaon. Therefore, due to phase-space restrictions the
number of produced kaons is roughly an order of magnitude smaller than that of
produced pions, in agreement with recent results from collisions of gold ions
at the BNL-RHIC. From its mass, we estimate that the Polyakov loop condensate
is characterized by a (spatial) correlation scale of 1/m_\ell ~ 1/2 fm. For
systems of deconfined matter of about that size, the free energy may not be
dominated by a condensate for the Polyakov loop, and so the process of
hadronization may be qualitatively different as compared to large systems. In
that vein, experimental data on hadron abundance ratios, for example K/pi, in
high-multiplicity pp events at high energies should be very interesting.


title: Neutrinos that violate CPT, and the experiments that love them

abstract:
  Recently we proposed a framework for explaining the observed evidence for
neutrino oscillations without enlarging the neutrino sector, by introducing CPT
violating Dirac masses for the neutrinos. In this paper we continue the
exploration of the phenomenology of CPT violation in the neutrino sector. We
show that our CPT violating model fits the existing SuperKamiokande data at
least as well as the standard atmospheric neutrino oscillation models. We
discuss the challenge of measuring CP violation in a neutrino sector that also
violates CPT. We point out that the proposed off-axis extension of MINOS looks
especially promising in this regard. Finally, we describe a method to compute
CPT violating neutrino effects by mocking them up with analog matter effects.


title: Yukawa Unification in SO(10)

abstract:
  In simple SO(10) SUSY GUTs the top, bottom and tau Yukawa couplings unify at
the GUT scale. A naive renormalization group analysis, neglecting weak scale
threshold corrections, leads to moderate agreement with the low energy data.
However it is known that intrinsically large threshold corrections proportional
to $\tan\beta \sim m_t(M_Z)/m_b(M_Z) \sim 50$ can nullify these $t, b$, $\tau$
mass predictions. In this paper we turn the argument around. Instead of
predicting fermion masses, we use the constraint of Yukawa unification and the
observed values $M_t, m_b(m_b), M_\tau$ to constrain SUSY parameter space. We
find a narrow region survives for $\mu > 0$ with $\mu, M_{1/2} << m_{16}$, $A_0
\approx - 1.9 m_{16}$ and $m_{16} > 1200$ \gev. Demanding Yukawa unification
thus makes definite predictions for Higgs and sparticle masses. In particular
we find a light higgs with mass $m_h^0 = 114 \pm 5 \pm 3$ GeV and a light stop
with $(m_{\tilde t_1})_{MIN} \sim 450$ GeV and $m_{\tilde t_1} << m_{\tilde
b_1}$. In addition, we find a light chargino and a neutralino LSP. It is also
significant that in this region of parameter space the SUSY contribution to the
muon anomalous magnetic moment $a_\mu^{SUSY} < 16 \times 10^{-10}$.


title: Loop-Generated Bounds on Changes to the Graviton Dispersion Relation

abstract:
  We identify the effective theory appropriate to the propagation of massless
bulk fields in brane-world scenarios, to show that the dominant low-energy
effect of asymmetric warping in the bulk is to modify the dispersion relation
of the effective 4-dimensional modes. We show how such changes to the graviton
dispersion relation may be bounded through the effects they imply, through
loops, for the propagation of standard model particles. We compute these bounds
and show that they provide, in some cases, the strongest constraints on
nonstandard gravitational dispersions. The bounds obtained in this way are the
strongest for the fewest extra dimensions and when the extra-dimensional Planck
mass is the smallest. Although the best bounds come for warped 5-D scenarios,
for which the 5D Planck Mass is O(TeV), even in 4 dimensions the graviton loop
can lead to a bound on the graviton speed which is comparable with other
constraints.


title: New U(1) Gauge Extension of the Supersymmetric Standard Model

abstract:
  In extending the minimal standard model of quarks and leptons to include
supersymmetry, the conservation of baryon and lepton numbers is no longer
automatic. I show how the latter may be achieved with a new U(1) gauge symmetry
and new supermultiplets at the TeV scale. Neutrino masses and a solution of the
$\mu$ problem are essential features of this proposed extension.


title: Vacuum polarization near cosmic string in RS2 brane world

abstract:
  Gravitational field of cosmic strings in theories with extra spatial
dimensions must differ significantly from that in the Einstein's theory. This
means that all gravity induced properties of cosmic strings need to be revised
too. Here we consider the effect of vacuum polarization outside a straight
infinitely thin cosmic string embedded in a RS2 brane world. Perturbation
technique combined with the method of dimensional regularization is used to
calculate ${< T_{\mu}^{\nu} >}_{vac}^{ren}$ for a massless scalar field.


title: Introduction to Diffraction and low x Dynamics

abstract:
  An attempt is made to illustrate the relation between low x process es and
diffraction. ep scattering provides a unique laboratory, a single hadronic
target probed by a point like lepton, where one can try to understand
diffraction in terms of a colourless exchange in QCD. Low x processes
eventually involve aspects of QCD which cannot be described perturbatively. The
HERA inclusive measurements are examined in this respect and compared to
results of the Tevatron.


title:
Higher Dimensional Supersymmetry as an Origin of the Three Families for
  Quarks and Leptons

abstract:
  In a (0,1) supersymmetric (SUSY) six-dimensional gauge theory, a gauge
fermion gives rise to box anomalies. These anomalies are completely canceled by
assuming a vector multiplet of (1,1) SUSY. With a T^2/Z_3 orbifold
compactification of the extra two dimensional space, the theory provides three
chiral multiplets and three equivalent fixed points. We regard them as the
origin of the three families of quarks and leptons. Quasi anarchy structure in
the SU(5)-5^* representation sector and hence the bimaximal mixing in the
neutrino oscillation are explained quite naturally in this framework. We also
discuss a family symmetry as a remnant of the higher-dimensional R symmetry.


title:
On the Day-Night Effect and CC to NC Event Rate Ratio Predictions for
  the SNO Detector

abstract:
  Detailed predictions for the D-N asymmetry for the Super-Kamiokande and SNO
experiments, as well as for the ratio of the CC and NC event rates measured by
SNO, in the cases of the LMA MSW and of the LOW solutions of the solar neutrino
problem, are derived. The possibilities to further constrain the regions of the
LMA MSW and LOW solutions of the solar neutrino problem by using the
forthcoming SNO data on the D-N asymmetry and on the CC to NC event rate ratio
are also discussed.


title: Theoretical Approaches to HERA Physics

abstract:
  A review is presented of the different theoretical models proposed to
approach consistently the interplay between soft and hard physics, that can now
be studied experimentally at HERA for the first time.


title:
Distinguishing magnetic moment from oscillation solutions of the solar
  neutrino problem with Borexino

abstract:
  Assuming that the observed deficit of solar neutrinos is due to the
interaction of their transition magnetic moment with the solar magnetic field
we derive the predictions for the forthcoming Borexino experiment. Three
different model magnetic field profiles which give very good global fits of the
currently available solar neutrino data are used. The expected signal at
Borexino is significantly lower than those predicted by the LMA, LOW and VO
neutrino oscillation solutions of the solar neutrino problem. It is similar to
that of the SMA oscillation solution which, however, is strongly disfavoured by
the Super-Kamiokande data on day and night spectra and zenith angle
distribution of the events. Thus, the neutrino magnetic moment solution of the
solar neutrino problem can be unambiguously distinguished from the currently
favoured oscillation solutions at Borexino.


title:
The sign of dm2_{31} and the muon-charge asymmetry for atmospheric
  neutrinos

abstract:
  We discuss the possibility to measure the sign of dm2_{31} from
matter-induced charge asymmetries in atmospheric neutrino oscillations. The
main conclusion is that an impact on the nu_mu survival probability requires
the action of the MSW resonance, which becomes visible for baselines above
\~7000 km.


title:
Estimate of the Collins fragmentation function in a chiral invariant
  approach

abstract:
  We predict the features of the Collins function, which describes the
fragmentation of a transversely polarized quark into an unpolarized hadron, by
modeling the fragmentation process at a low energy scale. We use the chiral
invariant approach of Manohar and Georgi, where constituent quarks and
Goldstone bosons are considered as effective degrees of freedom in the
non-perturbative regime of QCD. To test the approach we calculate the
unpolarized fragmentation function and the transverse momentum distribution of
a produced hadron, both of which are described reasonably well. In the case of
semi-inclusive deep-inelastic scattering, our estimate of the Collins function
in connection with the transversity distribution gives rise to a transverse
single spin asymmetry of the order of 10%, supporting the idea of measuring the
transversity distribution of the nucleon in this way. In the case of e+ e-
annihilation into two hadrons, our model predicts a Collins azimuthal asymmetry
of about 5%.


title: Extended Gauge Sectors at Multi-TeV e^+e^- Colliders

abstract:
  We give a brief overview of searches at TeV e^+e^- colliders for new
particles that arise in models with extended gauge sectors. We concentrate on
some recent developments in $W'$ searches and on leptoquark searches. We also
briefly mention $Z'$ searches.


title:
Update of Discovery Limits for Extra Neutral Gauge Bosons at Hadron
  Colliders

abstract:
  We study and compare the discovery potential for heavy neutral gauge bosons
(Z') at the various hadron colliders under discussion at Snowmass 2001 which
range in sqrt{s} from 14 TeV for the LHC to 200 TeV for a variant of the VLHC.
Typical search limits for pp colliders are ~0.25-0.30 times sqrt{s} assuming
100 fb^{-1} to 1 ab^{-1} of integrated luminosity with some variation due to
differences of fermion couplings in the different models. Discovery limits at
the Tevatron are ~1 TeV for 15 fb^{-1}, approximately 30--50% higher than this
rough guideline, due to the higher q\bar{q} luminosities in the p\bar{p} beams.


title: Flavor Physics and the CKM Matrix: An Overview

abstract:
  I review the current status of our knowledge of CP violation and flavor
physics. I discuss where one should look for future improvements, and outline
the experimental and theoretical priorities of the field.


title: The Spectrum of the Dirac Operator in the Linear Sigma Model with Quarks

abstract:
  We derive the spectrum of the Dirac operator for the linear sigma-model with
quarks in the large N_c approximation using renormalization group flow
equations. For small eigenvalues, the Banks-Casher relation and the vanishing
linear term are recovered. We calculate the coefficient of the next to leading
term and investigate the spectrum beyond the low energy regime.


title: Quarkonium Suppression

abstract:
  I discuss quarkonium suppression in equilibriated strongly interacting
matter. After a brief review of basic features of quarkonium production I
discuss the application of recent lattice data on the heavy quark potential to
the problem of quarkonium dissociation as well as the problem of direct lattice
determination of quarkonium properties in finite temperature lattice QCD.


title:
Current-carrying cosmic string loops 3D simulation: towards a reduction
  of the vorton excess problem

abstract:
  The dynamical evolution of superconducting cosmic string loops with specific
equations of state describing timelike and spacelike currents is studied
numerically. This analysis extends previous work in two directions: first it
shows results coming from a fully three dimensional simulation (as opposed to
the two dimensional case already studied), and it now includes fermionic as
well as bosonic currents. We confirm that in the case of bosonic currents,
shocks are formed in the magnetic regime and kinks in the electric regime. For
a loop endowed with a fermionic current with zero-mode carriers, we show that
only kinks form along the string worldsheet, therefore making these loops
slightly more stable against charge carrier radiation, the likely outcome of
either shocks or kinks. All these combined effects tend to reduce the number
density of stable loops and contribute to ease the vorton excess problem. As a
bonus, these effects also may provide new ways of producing high energy cosmic
rays.


title: WW scattering at the LHC

abstract:
  A detailed study is presented of elastic WW scattering in the scenario that
there are no new particles discovered prior to the commissioning of the LHC. We
work within the framework of the electroweak chiral lagrangian and two
different unitarisation protocols are investigated. Signals and backgrounds are
simulated to the final-state-particle level. A new technique for identifying
the hadronically decaying W is developed, which is more generally applicable to
massive particles which decay to jets where the separation of the jets is
small. The effect of different assumptions about the underlying event is also
studied. We conclude that the channel WW -> jj+l+nu may contain scalar and/or
vector resonances which could be measurable after 100 fb^(-1) of LHC data.


title: Physics with Supernovae

abstract:
  Core-collapse supernovae (SNe) are powerful neutrino sources and as such
important targets for the growing array of neutrino observatories. We review
the current status of SN theory and the expected characteristics of the
neutrino signal. After recalling what we have learned from SN 1987A and general
SN properties we review the physics potential of a future galactic SN
observation.


title:
Selected Results on the Transition from Short to Long Distance Physics
  at HERA

abstract:
  Recent results from the HERA ep collider are discussed with emphasis on the
transition from short to long distance phenomena in QCD. The results cover
inclusive ep scattering, inclusive diffractive scattering, vector meson
production, and deeply virtual Compton scattering (DVCS).


title: Dileptons in High-Energy Heavy-Ion Collisions

abstract:
  The current status of our understanding of dilepton production in
ultrarelativistic heavy-ion collisions is discussed with special emphasis on
signals from the (approach towards) chirally restored and deconfined phases. In
particular, recent results of the CERN-SPS low-energy runs are compared to
model predictions and interpreted. Prospects for RHIC experiments are given.


title: Stochastics of Multiple Electron-Photon Head-on Collisions

abstract:
  The problem of stochastis in multiple electron-photon head-on collisions has
been considered in this paper. The kinetic equations for the distributions over
the electron energy and collisions number along with the equations for these
distributions moments have been obtained. The equations for the first moments
have been solved by the iteration method. It has been shown that the variance
of the energy distribution as a function of the mean number of collisions has a
maximum at some value of $\bar n$. It is seen from this analysis that multiple
scattering of electrons influences on the spectra both electrons and photons
even for the photon target of small thickness. The data of approximate
analytical calculations agree with the results of the Monte Carlo simulation.


title: A Novel PQCD Approach in Charmless B-meson Decays

abstract:
  We discuss a novel pertubative QCD approach on the exclusive non-leptonic two
body B-meson decays. We briefly review its ingredients and some important
theoretical issues on the factorization approaches. We show numerical results
which is compatible with recent experimantal data for the charmless B-meson
decays.


title: The Structure Functions of Real Photon at Low Virtualities

abstract:
  The structure functions F_2 and F_1 of real photon at low virtualities are
calculated in the framework of chiral perturbation theory (ChPT) in the zero
and first order of ChPT. It is assumed that the virtuality of hard projectile
photon Q^2 is much less than the characteristic ChPT scale. The numerical
results for F_2 and F_1 are presented.


title: Leptonic Unitarity Triangle and CP-violation

abstract:
  The area of the unitarity triangle is a measure of CP-violation. We introduce
the leptonic unitarity triangles and study their properties. We consider the
possibility of reconstructing the unitarity triangle in future oscillation and
non-oscillation experiments. A set of measurements is suggested which will, in
principle, allow us to measure all sides of the triangle, and consequently to
establish CP-violation. For different values of the CP-violating phase,
$\delta_D$, the required accuracy of measurements is estimated. The key
elements of the method include determination of $|U_{e3}|$ and studies of the
$\nu_{\mu} - \nu_{\mu}$ survival probability in oscillations driven by the
solar mass splitting $\Delta m^2_{sun}$. We suggest additional astrophysical
measurements which may help to reconstruct the triangle. The method of the
unitarity triangle is complementary to the direct measurements of CP-asymmetry.
It requires mainly studies of the {\it survival} probabilities and processes
where oscillations are averaged or the coherence of the state is lost.


title:
Dynamical chiral symmetry breaking in gauge theories with extra
  dimensions

abstract:
  We investigate dynamical chiral symmetry breaking in vector-like gauge
theories in $D$ dimensions with ($D-4$) compactified extra dimensions, based on
the gap equation (Schwinger-Dyson equation) and the effective potential for the
bulk gauge theories within the improved ladder approximation. The non-local
gauge fixing method is adopted so as to keep the ladder approximation
consistent with the Ward-Takahashi identities.
  Using the one-loop $\bar{\rm MS}$ gauge coupling of the truncated KK
effective theory which has a nontrivial ultraviolet fixed point (UV-FP) $g_*$
for the (dimensionless) bulk gauge coupling ${\hat g}$, we find that there
exists a critical number of flavors, $N_f^{\rm crit}$ ($\simeq 4.2, 1.8$ for
$D=6, 8$ for SU(3) gauge theory): For $N_f > N_f^{\rm crit}$, the dynamical
chiral symmetry breaking takes place not only in the ``strong-coupling phase''
(${\hat g} >g_*$) but also in the ``weak-coupling phase'' (${\hat g} <g_*$)
when the cutoff is large enough. For $N_f < N_f^{\rm crit}$, on the other hand,
only the strong-coupling phase is a broken phase and we can formally define a
continuum (infinite cutoff) limit, so that the physics is insensitive to the
cutoff in this case.
  We also perform a similar analysis using the one-loop ``effective gauge
coupling''. We find the $N_f^{\rm crit}$ turns out to be a value similar to
that of the $\bar{\rm MS}$ case, notwithstanding the enhancement of the
coupling compared with that of the $\bar{\rm MS}$.


title: Big Bang Nucleosynthesis

abstract:
  A review of Big Bang Nucleosynthesis (BBN) is presented. Observations of
deuterium and helium-4 are discussed. Some BBN restrictions on non-standard
physics, especially on neutrino properties and time-variation of fundamental
constants are given.


title: Quark Model and Equivalent Local Potential

abstract:
  In this paper, we investigate the short-range repulsion given by the quark
cluster model employing an inverse scattering problem. We find that the local
potential which reproduces the same phase shifts to those given by the quark
cluster model has a strong repulsion at short distances in the NN1s0 channel.
There, however, appears an attractive pocket at very short distances due to a
rather weak repulsive behavior at very high energy region. This
repulsion-attractive-pocket structure becomes more manifest in the channel
which has an almost forbidden state, SigmaN(T=3/2)3s1. In order to see what
kinds of effects are important to reproduce the short-range repulsion in the
quark cluster model, we investigate the contribution coming from the
one-gluon-exchange potential and the normalization separately. It is clarified
that the gluon exchange constructs the short-range repulsion in the NN1s0 while
the quark Pauli-blocking effect governs the feature of the repulsive behavior
in the SigmaN(T=3/2)3s1 channel.


title: From constituent quarks to hadrons in course of nuclear matter expansion

abstract:
  The up-dated three-phase concept of nuclear matter evolution in course of
cooling down - from the phase of quark-qluon plasma (QGP) through the
intermediate phase allowing for massive constituent quarks (valons), pions and
kaons (QPK) to the phase of hadronic matter (H) - is exploited for the
treatment of relative hadronic yields in the central region of heavy ion
collisions. The most attention is paid to the description of the QPK-phase
which is argued to be a gaseous one and lasts until the valonic spacing
approaches the confinement radius (at the temperature about 110 MeV), when the
valons start fusing to be locked, in the end, within the hadrons. The hadronic
yields emerged from thermal treatment of QPK-phase and simple combinatorial
approach to the hadronization process are shown to fit the available
experimental data from AGS, SPS and RHIC quite well. This provides an
alternative insight into the real origin of the observed relative hadronic
yields which is (to a considerable extent) free of the well known puzzle
inherent in some conventional models where the early chemical freeze-out is
assumed: namely, why the gaseous thermal approach to actually tightly packed
(even overlapping) hadrons seems workable? Many predictions for the other
hadronic yields which could be observed at these machines as well as at LHC are
given.


title: Topcolor Dynamics and The effective gluon-gluon-Higgs Operator

abstract:
  We discuss the production of the composite Higgs boson in topcolor models via
the gluon fusion process. We consider the contribution of color-octet massive
gauge bosons (colorons) strongly interacting with the top quark, in addition to
nonstandard contributions of the top-Yukawa coupling and heavy colored fermions
other than the top quark. In order to estimate the contribution of colorons, we
derive the low-energy effective theory by eliminating colorons by using the
equation of motion for colorons. We replace the composite operator (\bar{q}_L
t_R)(\bar{t}_R q_L) in the effective theory by the composite Higgs operator. We
then obtain the effective gluon-gluon-Higgs (ggH-) operator induced by colorons
and find that its coefficient (A_{col}) is proportional to m_{dyn}^2/M^2, where
M and m_{dyn} denote the coloron mass and the mass dynamically generated by
colorons, respectively. The contribution of colorons A_{col} becomes comparable
to the top-loop effect A_{top} for M=O(1TeV) and m_{dyn}=O(0.6TeV). Such a
large dynamical mass can be realized in top-seesaw (TSS) models consistently
with the experimental value of the top quark mass (m_t^{exp}), while the
dynamical mass itself is adjusted to m_t^{exp} in topcolor assisted technicolor
models (TC2). We find that the coloron contribution A_{col} can be sizable in a
certain class of TSS models: the contribution of colorons (the top-loop) is
dominant in the real (imaginary) part of the H->gg amplitude for the Higgs
boson mass m_H of the order of 1 TeV. On the other hand, enhancement of the
top-Yukawa coupling becomes important in TC2. We can observe signatures of the
Higgs boson in TC2 with m_H \sim 200 GeV even at the Tevatron Run II as well as
at the LHC. We estimate S/\sqrt{B}=3-6 for an integrated luminosity of 2
fb^{-1} and m_H=190 GeV at the Tevatron Run II.


title: Heavy quarkonium production in hadronic collisions

abstract:
  Different theoretical models which attempt to describe hadronic production of
heavy quarkonia are reviewed. Firstly, we consider the Color Singlet Model and
point out the large discrepancies between the theoretical predictions and the
results from the Tevatron detectors. Then some other models are introduced,
quickly discussed and confronted with experimental results. Finally, we suggest
possible ways to understand the source of the remaining discrepancies.


title: The Sources of b-Quarks at the Tevatron and their Correlations

abstract:
  The leading-log order QCD hard scattering Monte-Carlo models of HERWIG,
ISAJET, and PYTHIA are used to study the sources of b-quarks at the Tevatron.
The reactions responsible for producing b and bbar quarks are separated into
three categories; flavor creation, flavor excitation, and
parton-shower/fragmentation. Flavor creation corresponds to the production of a
b-bbar pair by gluon fusion or by annihilation of light quarks, while flavor
excitation corresponds to a b or bbar quark being knocked out of the
initial-state by a gluon or a light quark or antiquark. The third source occurs
when a b-bbar pair is produced within a parton shower or during the
fragmentation process of a gluon or a light quark or antiquark (includes gluon
splitting). The QCD Monte-Carlo models indicate that all three sources of
b-quarks are important at the Tevatron and when combined they qualitatively
describe the inclusive cross-section data. Correlations between the b and bbar
quark are very different for the three sources and can be used to isolate the
individual contributions.


title: Quark-hadron duality in a relativistic, confining model

abstract:
  Quark-hadron duality is an interesting and potentially very useful
phenomenon, as it relates the properly averaged hadronic data to a perturbative
QCD result in some kinematic regions. While duality is well established
experimentally, our current theoretical understanding is still incomplete. We
employ a simple model to qualitatively reproduce all the features of
Bloom-Gilman duality as seen in electron scattering. In particular, we address
the role of relativity, give an explicit analytic proof of the equality of the
hadronic and partonic scaling curves, and show how the transition from coherent
to incoherent scattering takes place.


title:
Next-to-leading order QCD corrections to differential distributions of
  Higgs boson production in hadron-hadron collisions

abstract:
  We present the full next-to-leading order corrected differential
distributions $d^2\sigma/dp_T/dy$, $d\sigma/dp_T$ and $d\sigma/dy$ for the
semi-inclusive process $p + p\to H + 'X'$. Here $X$ denotes the inclusive
hadronic state and $p_T$ and $y$ are the transverse momentum and rapidity of
the Higgs-boson $H$ respectively. All QCD partonic subprocesses have been
included. The computation is carried out in the limit that the top-quark mass
$m_t \to \infty$ which is a very good approximation as long as $m_H,p_T < 200$
GeV. Our calculations reveal that the dominant subprocess is given by $g + g
\to H + 'X'$ but the reaction $g + q(\bar q) \to H + 'X'$ is not negligible.
Another feature is that the $K$-factor representing the ratio between the
next-to-leading order and leading order differential distributions is large. It
varies from 1.4 to 1.7 depending on the kinematic region and choice of parton
densities. We show that a reliable determination of the differential cross
sections requires good knowledge of the gluon density in the region where $x <
10^{-3}$. Further we study whether the differential distributions are dominated
at large transverse momentum by soft-plus-virtual gluon contributions. This is
of interest for the resummation of large corrections which occur near the
boundary of phase space. We also compare our results with those previously
reported in the literature.


title: Solving QCD Hamiltonian for Bound States

abstract:
  We consider the eigenstate problem for a Hamiltonian operator of the field
theory. Methods of construction the effective field theoretical Hamiltonians
for which the eigenstate problem may be solved are discussed. In particular, we
discuss the method of flow equations from a general perspective as well as in
application to the gauge field theories. Flow equations transform the
Hamiltonian to a block-diagonal form with the number of particles conserved in
each block and thus reduce the original bound state problem to a set of coupled
eigenstate equations with an effective Hamiltonian in each sector.
  Applications of flow equations to the Hamiltonians of QED and QCD in the
light-front gauge and the QCD Hamiltonian in the Coulomb gauge are considered.
Using flow equations, we derive the effective Hamiltonians as well as the
renormalized gap equations and the Bethe-Salpeter equations for the bound
states in these theories. We show that the obtained equations are finite in
both UV and IR regions and are completely renormalized in UV, i.e. the
corresponding solutions do not depend on the cut-off $\Lambda$.
  We calculate positronium spectrum, glueball masses, $\pi-\rho$ mass
splitting, gluon and chiral quark condensates and compare our results with the
covariant calculations and experimental results. Use of flow equations to
calculate the dynamical terms is critical to achive good agreement with
experimental results.


title: Monopole-anti-monopole bounded pairs

abstract:
  We show that in the dual version of the generalized Dick model
monopole-anti-monopole pairs have finite energy. It is possible to use the
potential between monopole and anti-monopole to find the mass spectrum of the
glueballs. The results are discussed in connection with the Faddeev-Niemi model
and toroidal soliton solutions. Some others finite energy configurations are
found, both in the magnetic and electric sector.


title:
Two Higgs Doublet Model, Standard Model-like Scenario and Resolving SM
  from 2HDM at Photon Colliders

abstract:
  1. Discussing 2HDM and Higgs potential, we find the parameters range giving
naturally weak effects of CP violation and Flavor Changing Neutral Currents.
Within this approach, the widely discussed decoupling limit with heavy $H^\pm$,
$H$ and $A$ corresponds to an unnatural set of 2HDM parameters.
  2. We define the SM--like scenario as that in which after LHC and e^+e^- LC
operations no visible deviations from the minimal SM will be found. We find all
the parameter ranges of 2HDM compatible with this scenario.
  3. We show that the study of Higgs boson production at Photon Colliders
(processes $\gamma \gamma \to h$ and $e \gamma\to eh$) can help to distinguish
minimal SM from 2HDM with natural set of parameters.


title: Semileptonic decays of the bottom-charm hadrons

abstract:
  We present the results of a study of the semileptonic decays of the
$B_c$-meson and the lowest lying doubly heavy baryons using the relativistic
quark model. We do not employ a heavy quark mass expansion but keep the masses
of the heavy quarks and hadronss finite. We calculate all relevant form factors
and decay rates.


title: Spin and other aspects of generalized parton distributions

abstract:
  I discuss how generalized parton distribution probe various aspects of QCD
bound states. Topics include the interplay between transverse and longitudinal
structure, quantum mechanical interference, orbital angular momentum, helicity
flip, and higher-spin targets.


title: Signatures of Supersymmetry in B Decays - A Theoretical Perspective

abstract:
  We discuss precision tests of the standard model in radiative and
semileptonic rare B-decays and CP-violating asymmetries, and possible
signatures of supersymmetry in these processes. Motivated by current data, and
with an eye on the forthcoming measurements, we restrict ourselves to the
processes in which the bench marks set by the standard model have either been
met by ongoing experiments or are expected to be met shortly. This includes the
mixing-induced CP asymmetry, measured through $\sin 2 \beta$, and branching
ratios for the radiative and semileptonic rare decays $B \to X_s \gamma$, $B
\to K^* \gamma$, $B \to X_s \ell^+ \ell^-$ and $B \to (K,K^*) \ell^+ \ell^-$,
where $\ell^\pm =e^\pm, \mu^\pm$.


title:
$(g-2)_{\mu}$ and CP Asymmetries in $B^0_{d,s} \to l^+ l^-$ and $b \to s
  \gamma$ in SUSY models

abstract:
  We show that with a good fit to the muon $g-2$ constraint, the CP asymmetry
can be as large as 25% (15%) for $B^0_d \to \tau^+ \tau^-$ ($B^0_d \to \mu^+
\mu^-$) in SUGRA models with nonuniversal gaugino masses and MSSM. If tau
events indentified at B factories the CP asymmetry in $B^0_d \to \tau^+\tau^-$
can be a powerful probe on physics beyond SM. An interesting case is that new
physics gives a prediction on the branching ratio which is still in the
uncertain region of the SM prediction. The CP asymmetry for $B^0_d \to l^+ l^-$
in this case can still reach 20%. So it is powerful to shed light on physics
beyond SM while the CP asymmetry of $b \to s \gamma$ in this case can only
reach 2% at most which is too small to draw a definite conclusion on new
physics effects at B factories.


title: Accuracy of muon transport simulation

abstract:
  Chain of calculations which have to be performed to predict any kind of
signal in a deep underwater/ice neutrino detector necessarily includes the
lepton propagation through thick layers of matter, as neutrino can be observed
only by means of leptons (muons, first of all, due to their large ranges) that
are generated in $\nu N \to l N$ interactions. Thus, the muon propagation plays
a key role when analyzing data and it is important to understand clearly how
transportation part of simulation chain contributes to total inaccuracy of
final results. Here we consider sources of uncertainties that appear in Monte
Carlo algorithms for simulation of muon transport. The trivial but effective
test is proposed to measure the propagation algorithm accuracy. The test is
applied to three MC muon transport codes (PROPMU, MUSIC, MUM) and results are
reported.


title:
Strange Resonance Production: Probing Chemical and Thermal Freeze-out in
  Relativistic Heavy Ion Collisions

abstract:
  The production and the observability of $\Lambda(1520)$, $K^0(892)$ $\Phi$
and $\Delta(1232)$ hadron resonances in central Pb+Pb collisions at 160 AGeV is
addressed. The rescattering probabilities of the resonance decay products in
the systems evolution are studied. Strong changes in the reconstructable
particle yields and spectra between chemical and thermal freeze-out are
estimated. Abundances and spectra of reconstructable resonances are predicted.


title:
Topological and non-topological solutions in the 3-phase model of hybrid
  chiral bag

abstract:
  The 3-phase version of the hybrid chiral bag model, containing the phase of
asymptotic freedom, the hadronization phase as well as the intermediate phase
of constituent quarks, is proposed. For this model the self-consistent
solutions, which take into account the fermion vacuum polarization effects, are
found in 1+1 D. The renormalized total energy of the bag is studied as a
function of its geometry and topological (baryon) number. It is shown that in
the case of non-zero topological charge there exists a set of configurations
being the local minima of the total energy of the bag and containing all the
three phases, while in the non-topological case the minimum of the total energy
of the bag corresponds to vanishing size of the phase of asymptotic freedom.


title: Torsion Constraints in the Randall--Sundrum Scenario

abstract:
  Torsion appears due to fermions coupled to gravity and leads to the strongest
particle physics bounds on flat extra dimensions. In this work, we consider
torsion constraints in the case of a warped extra dimension with brane and bulk
fermions. From current data we obtain a 3-sigma bound on the TeV--brane mass
scale scale \Lambda_\pi > 2.2 (10) TeV for the AdS curvature k=1 (0.01) in
(reduced) Planck units. If Dirac or light sterile neutrinos reside on the
brane, the bound increases to 17 (78) TeV.


title: Report of the Subgroup on Alternative Models and New Ideas

abstract:
  We summarize some of the work done by the P3 subgroup on Alternative Models
and New Ideas. The working group covered a broad range of topics including a
constrained Standard Model from an extra dimension, a discussion of recent
ideas addressing the strong CP problem, searches for doubly charged higgs
bosons in e gamma collisions, and an update on discovery limits for extra
neutral gauge bosons at hadron colliders. The breadth of topics reflects the
many ideas and approaches to physics beyond the Standard Model.


title: NNLO global parton analysis

abstract:
  We perform a NNLO (and a LO) global parton analysis in which we include the
new precise data for deep inelastic scattering from HERA and for inclusive jet
production at the Tevatron, together with the improved knowledge of the
three-loop splitting functions. The results are compared with our recent NLO
analyses. The LO fit produces significantly worse results in general, but gives
a surprisingly good fit to the Tevatron high-E_T jet data. For the approximate
NNLO analysis we notice a slight improvement in the quality of the global fit,
and find that the partons are changed by up to 10% at Q^2=10 GeV^2$, in
particular in the x<0.01 regime.


title:
Constraints on Large Extra Dimensions from Neutrino Oscillation
  Experiments

abstract:
  The existence of bulk sterile neutrinos in theories with large extra
dimensions can naturally explain small 4-dimensional Dirac masses for the
active neutrinos. We study a model with 3 bulk neutrinos and derive various
constraints on the size of the extra dimensions from neutrino oscillation
experiments. Our analysis includes recent solar and atmospheric data from SNO
and Super-Kamiokande, respectively, as well as various reactor and accelerator
experiments. In addition, we comment on possible extensions of the model that
could accommodate the LSND results, using natural parameters only. Our most
conservative bound, obtained from the atmospheric data in the hierarchical mass
scheme, constrains the largest extra dimension to have a radius R < 0.82
microns. Thus, in the context of the model studied here, future gravitational
experiments are unlikely to observe the effects of extra dimensions.


title: Seeking experimental probes of string unification

abstract:
  A general prediction of string unification is the existence of exotic states
with fractional charges under the free unbroken Abelian generators of the
underlying GUT symmetry. Such states may be long-lived due to the existence of
weakly broken gauge, or local discrete, symmetries, and may serve as
experimental probes of string theory in forthcoming cosmic ray and dark matter
experiments.


title: Eliminating the d=5 proton decay operators from SUSY GUTs

abstract:
  A general analysis is made of the question whether the d=5 proton decay
operators coming from exchange of colored Higgsinos can be completely
eliminated in a natural way in supersymmetric grand unified models. It is shown
that they can indeed be in SO(10) while at the same time naturally solving the
doublet-triplet splitting problem, having only two light Higgs doublets, and
using no more than a single adjoint Higgs field. Accomplishing all of this
requires that the vacuum expectation value of the adjoint Higgs field be
proportional to the generator I_{3R} rather than to B-L, as is usually assumed.
It is shown that such models can give realistic quark and lepton masses. We
also point out a new mechanism for solving the \mu problem in the context of
SO(10) SUSY GUTs.


title: Neutrinos Vis-a-vis the Six-Dimensional Standard Model

abstract:
  We examine the origin of neutrino masses and oscillations in the context of
the six-dimensional standard model. The space-time symmetries of this model
explain proton stability and forbid Majorana neutrino masses. The consistency
of the six-dimensional theory requires three right-handed neutrinos, and
therefore Dirac neutrino masses are allowed. We employ the idea that the
smallness of these masses is due to the propagation of the right-handed
neutrinos in a seventh, warped dimension. We argue that this class of theories
is free of gravitational anomalies. Although an exponential hierarchy arises
between the neutrino masses and the electroweak scale, we find that the mass
hierarchy among the three neutrino masses is limited by higher-dimension
operators. All current neutrino oscillation data, except for the LSND result,
are naturally accommodated by our model. In the case of the solar neutrinos,
the model leads to the large mixing angle, MSW solution. The mechanism
employed, involving three right-handed neutrinos coupled to a scalar in an
extra dimension, may explain the features of the neutrino spectrum in a more
general class of theories that forbid Majorana masses.


title:
Supersymmetric Electroweak Corrections to the Higgs Boson Decays into
  Chargino or Neutralino Pair

abstract:
  We investigate the supersymmetric electroweak corrections to the decay widths
of the CP-odd and the heavy CP-even Higgs bosons into chargino or neutralino
pair in the framework of the Minimal Supersymmetric Standard Model. The
corrections involve the contributions of the order $O(\alpha_{ew}
m_{t(b)}^3/m_W^3)$, $O(\alpha_{ew} m_{t(b)}^2/m_W^2)$ and $O(\alpha_{ew}
m_{t(b)}/m_W)$. The detailed calculations of the electroweak corrections to the
following decay processes: $A^0/H^0 \to \tilde{\chi}^+_1 \tilde{\chi}^-_1$ and
$A^0/H^0 \to \tilde{\chi}^0_2 \tilde{\chi}^0_2$ are presented in this paper. We
find that these relative corrections maybe rather large quantitatively, and can
exceed 10% in some regions of parameter space. The corrections to the decay
$A^0/H^0 \to \tilde{\chi}^0_1 \tilde{\chi}^0_2$ can be obtained analogously,
but our results show that they are very small and can be neglected.


title: Systematic Study of 3-3-1 Models

abstract:
  We carry a systematic study of possible models based on the local gauge group
SU(3)_c X SU(3)_L X U(1)_X. Old and new models emerge from the analysis.


title: Interpreting the LSND anomaly: sterile neutrinos or CPT-violation or...?

abstract:
  We first study how sterile neutrinos can fit the 5sigma bar-nu_mu -->
bar-nu_e LSND anomaly: 2+2 solutions are strongly disfavoured by solar and
atmospheric data, while 3+1 solutions can still give a poor fit (for a specific
range of oscillation parameters, to be tested by MiniBooNE). If instead
MiniBoone will find no nu_mu --> nu_e signal, we will have a hint for CPT
violation. Already now, unlike sterile neutrinos, CPT-violating neutrino masses
can nicely accomodate all safe and unsafe data. We study how much CPT must be
conserved according to atmospheric and K2K data and list which CPT-violating
signals could be discovered by forthcoming solar and long-baseline experiments.


title:
Magnetic permeability of near-critical 3d abelian Higgs model and
  duality

abstract:
  The three-dimensional abelian Higgs model has been argued to be dual to a
scalar field theory with a global U(1) symmetry. We show that this duality,
together with the scaling and universality hypotheses, implies a scaling law
for the magnetic permeablity chi_m near the line of second order phase
transition: chi_m ~ t^nu, where t is the deviation from the critical line and
nu ~ 0.67 is a critical exponent of the O(2) universality class. We also show
that exactly on the critical lines, the dependence of magnetic induction on
external magnetic field is quadratic, with a proportionality coefficient
depending only on the gauge coupling. These predictions provide a way for
testing the duality conjecture on the lattice in the Coulomb phase and at the
phase transion.

categories: hep-ph cond-mat.supr-con hep-lat hep-th nucl-th


title: Reparametrization Invariance in Inclusive Decays of Heavy Hadrons

abstract:
  Reparametrization invariance is the invariance of the heavy mass limit under
small changes of the heavy-quark four velocity. We discuss the implications of
this invariance for non-local light cone operators, the matrix elements of
which are relevant for the leading and subleading shape functions describing
differential rates for inclusive heavy-to-light transitions.


title: CP Violation

abstract:
  Several pieces of direct and indirect evidence now suggest that the
Kobayashi-Maskawa mechanism plays a distinguished role for CP violation at the
electroweak scale. This talk provides a general overview of CP violation in its
various contexts, emphasizing CP violation in flavour-violating interactions,
such as due to the Kobayashi-Maskawa mechanism. I then review a few recent
theoretical developments relevant to the interpretation of CP violation.


title: Electromagnetic Form Factors of the Nucleon in the Chiral Soliton Model

abstract:
  Several years ago it was pointed out that the chiral soliton model allows
naturally for satisfactory agreement with the experimentally well-determined
proton magnetic form factor $G_M^p$. The corresponding result for the proton
electric form factor at that time was in serious disagreement with the data
because the calculated $G_E^p$ showed as a rather stable feature a zero for
$q^2$ near 10 (GeV/c)$^2$ which was hard to avoid for reasonable choices of
parameters, while the data at that time showed no indication for such a
behaviour. Meanwhile, new data have confirmed those $G_E^p$ predictions in a
remarkable way, so it appears worthwhile to have another look at that model,
especially concerning its flexibility with repect to the electric neutron
formfactor $G_E^n$ while trying to maintain the satisfactory results for the
proton form factors.


title: Black Holes at Neutrino Telescopes

abstract:
  In scenarios with extra dimensions and TeV-scale quantum gravity, black holes
are expected to be produced in the collision of light particles at
center-of-mass energies above the fundamental Planck scale with small impact
parameters. Black hole production and evaporation may thus be studied in detail
at the Large Hadron Collider (LHC). But even before the LHC starts operating,
neutrino telescopes such as AMANDA/IceCube, ANTARES, Baikal, and RICE have an
opportunity to search for black hole signatures. Black hole production in the
scattering of ultrahigh energy cosmic neutrinos on nucleons in the ice or water
may initiate cascades and through-going muons with distinct characteristics
above the Standard Model rate. In this Letter, we investigate the sensitivity
of neutrino telescopes to black hole production and compare it to the one
expected at the Pierre Auger Observatory, an air shower array currently under
construction, and at the LHC. We find that, already with the currently
available data, AMANDA and RICE should be able to place sensible constraints in
black hole production parameter space, which are competitive with the present
ones from the air shower facilities Fly's Eye and AGASA. In the optimistic case
that a ultrahigh energy cosmic neutrino flux significantly higher than the one
expected from cosmic ray interactions with the cosmic microwave background
radiation is realized in nature, one even has discovery potential for black
holes at neutrino telescopes beyond the reach of LHC.


title: New results in cosmology

abstract:
  From an observational perspective cosmology is today in excellent shape -
advances in instrumentation and data processing have enabled us to study the
universe in detail back to when the first galaxies formed, map the fluctuations
in the cosmic microwave background which provide a measure of the overall
geometry, and reconstruct the thermal history reliably back to at least the
primordial nucleosynthesis era. However recent deep studies of the Hubble
expansion rate have suggested that the universe is accelerating, driven by some
form of `dark' (vacuum) energy. If true, this implies a new energy scale in
Nature of order 0.001 eV, well below any known scale of fundamental physics.
This has refocussed attention on the notorious cosmological constant problem at
the interface of general relativity and quantum field theory. It is possible
that the resolution of this situation will require fundamental modifications to
our ideas about gravity.


title: High-Mass Supersymmetry with High Energy Hadron Colliders

abstract:
  While it is natural for supersymmetric particles to be well within the mass
range of the large hadron collider, it is possible that the sparticle masses
could be very heavy. Signatures are examined at a very high energy hadron
collider and an very high luminosity option for the Large Hadron Collider in
such scenarios.


title: Status of Chemical Equilibrium in Relativistic Heavy Ion Collisions

abstract:
  Recent work on chemical equilibrium in heavy ion collisions is reviewed. The
energy dependence of thermal parameters is discussed. The centrality dependence
of thermal parameters at SPS energies is presented.


title: Dynamical masses of quarks in quantum chromodynamics

abstract:
  Using Dyson-Schwinger equations we obtain an ultraviolet asymptotics for the
dynamical mass of quark in QCD. We also determine a numerical value for the \pi
meson decay constant f_\pi.


title: Charmed Hadron Production at RHIC

abstract:
  To extract information about polarized gluon distribution in the proton,
charmed hadron, actually \Lambda_c^+, productions at RHIC experiment are
studied. We found that the spin correlation asymmetry between the initial
proton and the produced \Lambda_c^+ is enable us to distinguish
parameterization models of polarized gluons.


title: Polarized s-quark Distribution in Charmed Hadron Leptoproduction

abstract:
  In order to extract the polarized strange quark density in proton, we studied
the semi-inclusive $\Lambda_c$/$\bar{\Lambda}_c$ leptoproduction in charged
current DIS at THERA energies. We indicate that measurements of the spin
correlation between the incident proton and the produced
$\Lambda_c$/$\bar{\Lambda}_c$ baryon gives us information about the polarized
strange quark distribution.


title: Summary: Working Group on QCD and Strong Interactions

abstract:
  In this summary of the considerations of the QCD working group at Snowmass
2001, the roles of quantum chromodynamics in the Standard Model and in the
search for new physics are reviewed, with empahsis on frontier areas in the
field. We discuss the importance of, and prospects for, precision QCD in
perturbative and lattice calculations. We describe new ideas in the analysis of
parton distribution functions and jet structure, and review progress in
small-$x$ and in polarization.


title: Lepton Photon 2001 Concluding Remarks

abstract:
  Important new results have been presented at this conference. The direct
violation of CP in $K^{0}\to \pi+\pi$ has been firmly established in two
independent experiments, NA48 at CERN and KTeV at Fermilab. Both Babar at SLAC
and Belle at KeK have determined the CP violation in $B^{0}_{d}-\bar B^{0}_{d}$
oscillations through the study of the golden $K_{S}+\Psi$ decay mode. The
observed CP violation agrees with the expectations of the Standard model, based
on the quark-mixing phenomenon. The first results of the Sudbury Neutrino
Observatory, SNO, suggest that the long-lasting solar neutrino puzzle has been
finally solved in terms of neutrino oscillations. Results appeared after the
conference which modify the theoretical prediction of the muon anomaly. This
new result, if confirmed, would drastically reduce the significance of the
discrepancy between the theoretically expected value for the muon anomaly and
the recent results of the Brookhaven experiment.


title: The Weak Mixing Angle from an SU(3) Symmetry at a TeV

abstract:
  The measured values of two electroweak gauge couplings appear to obey an
approximate 5% SU(3) relation. Unless this is an accident caused by fortuitous
Planck-scale physics, it suggests the presence of an SU(3) symmetry near the
electroweak scale. We propose this to be a local SU(3) which spontaneously
``mixes'' with SU(2) x U(1) near a TeV. Although all the particles of the
standard model are SU(3)-singlets, this symmetry relates the electroweak gauge
couplings and can successfully predict the weak mixing angle with a precision
of a few percent. Since this mechanism operates at a TeV, it does not require
an energy desert and consequently can be embedded in theories of TeV-gravity.


title:
Novosibirsk hadronic currents for tau -> 4pi channels of tau decay
  library TAUOLA

abstract:
  The new parameterization of form factors developed for 4pi channels of the
tau lepton decay and based on Novosibirsk data on e^+e^- -> 4pi has been coded
in a form suitable for the TAUOLA Monte Carlo package. Comparison with results
from TAUOLA using another parameterization, i.e. the CLEO version of 1998 is
also included.


title: Single spin asymmetries in QCD

abstract:
  Measurements of single transverse spin asymmetries in high energy inclusive
processes have always shown unexpected and challenging results. Several cases
are considered and discussed within a QCD approach which couples perturbative
dynamics to new non perturbative partonic information; the aim is that of
developing a consistent phenomenological description of these unusual single
spin phenomena, based on a generalized QCD factorization scheme.


title: Texture Zeros and Majorana Phases of the Neutrino Mass Matrix

abstract:
  We present the generic formulas to calculate the ratios of neutrino masses
and the Majorana phases of CP violation from the neutrino mass matrix with two
independent vanishing entries in the flavor basis where the charged lepton mass
matrix is diagonal. An order-of-magnitude illustration is given for seven
experimentally acceptable textures of the neutrino mass matrix, and some
analytical approximations are made for their phenomenological consequences at
low energy scales.


title:
Family replicated gauge groups and large mixing angle solar neutrino
  solution

abstract:
  We present a modification of our previous family replicated gauge group
model, which now generates the Large Mixing Angle MSW solution rather than the
experimentally disfavoured Small Mixing Angle MSW solution to the solar
neutrino oscillation problem. The model is based on each family of quarks and
leptons having its own set of gauge fields, each containing a replica of the
Standard Model gauge fields plus a (B-L)-coupled gauge field. By a careful
choice of the Higgs field gauge quantum numbers, we avoid our previous
prediction that the solar neutrino mixing angle is equal order of magnitudewise
to the Cabibbo angle, replacing it and the well-known Fritzsch relation with
the relation \theta_{c}\sim (\theta_{\odot})^{-1/3} (m_d/m_s)^{2/3}. At the
same time we retain a phenomenologically successful structure for the charged
quark and lepton mass matrices. A fit of all the seventeen quark-lepton mass
and mixing angle observables, using just six new Higgs field vacuum expectation
values, agrees with the experimental data within the theoretically expected
uncertainty of about 64%, i.e. it fits perfectly order of magnitudewise.


title: A Model of Hot-Sector Generations

abstract:
  Possible existence of "hot-sector generations" above the well known 3
generation bound is investigated on the basis of a model of leptons and quarks,
which is based on the Harari and Shupe's one. Our model predicts the existence
of {\bf3 + 1} generations above the ordinary "cold-sector" 3 generations.
Majorana neutrinos are introduced to realize the heavy neutrino masses in
hot-sector generations. Properties of heavy neutrinos are also discussed.


title: Accretion disc onto a static non-baryonic compact object

abstract:
  We study the emissivity properties of a geometrically thin, optically thick,
steady accretion disc about a static boson star. Starting from a numerical
computation of the metric potentials and the rotational velocities of the
particles in the vicinity of the compact object, we obtain the power per unit
area, the temperature of the disc, and the spectrum of the emitted radiation.
In order to see if different central objects could be actually distinguished,
all these results are compared with the case of a central Schwarzschild black
hole of equal mass. We considered different situations both for the boson star,
assumed with and without self-interactions, and the disc, whose internal
commencement can be closer to the center than in the black hole case. We
finally make some considerations about the Eddington luminosity, which becomes
radially dependent for a transparent object. We found that, particularly at
high energies, differences in the emitted spectrum are notorious. Reasons for
that are discussed.


title:
Thermal Stabilisation of Superconducting Sigma Strings and their Drum
  Vortons

abstract:
  We discuss various issues related to stabilized embedded strings in a thermal
background. In particular, we demonstrate that such strings will generically
become superconducting at moderately low temperatures, thus enhancing their
stability. We then present a new class of defects - drum vortons - which arise
when a small symmetry breaking term is added to the potential. We display these
points within the context of the O(4) sigma model, relevant for hadrodynamics
below the QCD scale. This model admits `embedded defects' (topological defect
configurations of a simpler - in this case O(2) symmetric - model obtained by
imposing an embedding constraint) that are unstable in the full model at zero
temperature, but that can be stabilised (by electromagnetic coupling to
photons) in a thermal gas at moderately high termperatures. It is shown here
that below the embedded defect stabilisation threshold, there will still be
stabilized cosmic string defects. However, they will not be of the symmetric
embedded vortex type, but of an `asymmetric' vortex type, and are automatically
superconducting. In the presence of weak symmetry breaking terms, such as arise
naturally when using the O(4) model for hadrodynamics, the strings become the
boundary of a new kind of cosmic sigma membrane, with tension given by the pion
mass. The string current would then make it possible for a loop to attain a
(classically) stable equilibrium state that differs from an ``ordinary'' vorton
state by the presence of a sigma membrane stretched across it in a drum like
configuration. Such defects will however be entirely destabilised if the
symmetry breaking is too strong, as is found to be the case -- due to the
rather large value of the pion mass -- in the hadronic application of the O(4)
sigma model.


title: Candidates for non-baryonic dark matter

abstract:
  This report is a brief review of the efforts to explain the nature of
non-baryonic dark matter and of the studies devoted to the search for relic
particles. Among the different dark matter candidates, special attention is
devoted to relic neutralinos, by giving an overview of the recent calculations
of its relic abundance and detection rates in a wide variety of supersymmetric
schemes.


title: Near threshold radiative 3$\pi$ production in $e^+e^-$ annihilation

abstract:
  We consider the $\pi^+\pi^-\pi_0\gamma$ final state in electron-positron
annihilation at cms energies not far from the threshold. Both initial and final
state radiations of the hard photon is considered but without interference
between them. The amplitude for the final state radiation is obtained by using
the effective Wess-Zumino-Witten Lagrangian for pion-photon interactions valid
for low energies. In real experiments energies are never such small that $\rho$
and $\omega$ mesons would have negligible effect. So a phenomenological
Breit-Wigner factor is introduced in the final state radiation amplitude to
account for the vector mesons influence. Using radiative 3$\pi$ production
amplitudes, a Monte Carlo event generator was developed which could be useful
in experimental studies.


title:
Probing Strongly Interacting Electroweak Symmetry Breaking Mechanism at
  High Energy Collider

abstract:
  We sketch some of our recent studies on probing strongly interacting
electroweak symmetry breaking mechanism at high energy colliders such as the
CERN LHC and the future e(+)e(-) linear collider. The study includes both
model-dependent and model-independent probes.


title: Probing Intrinsic Charm with Semileptonic B Decays

abstract:
  We discuss semileptonic B decays of the form B -> J/Psi e nu X as possible
probes of intrinsic charm. We calculate the leading order perturbative
contribution to the process B- -> J/Psi e- nu_e X and find it to be
unobservably small, with a branching ratio ~ 10^-10. We propose a modified
spectator model to estimate the intrinsic charm contribution and find that it
can be significantly larger, with a branching ratio for B -> (c cbar) e- nu_e X
as large as 5 X 10^-7. We show that the process could be observed at these
levels by CDF assuming a Run II integrated luminosity of 15 fb^-1, making this
a useful reaction to probe the idea of intrinsic charm.


title: Effective operators and vacuum instability as heralds of new physics

abstract:
  For a light enough Higgs boson, the effective potential of the Standard Model
develops a dangerous instability at some high energy scale, Lambda, signalling
the need for new physics below that scale. On the other hand, a typical
low-energy remnant of new physics at some heavy scale, M, is the presence of
effective non-renormalizable operators (NROs), suppressed by powers of 1/M. It
has been claimed that such operators may modify the behaviour of the effective
potential, in such a way as to significantly lower the instability scale. We
critically reanalyze the interplay between non-renormalizable operators and
vacuum instabilities and find that, contrary to these claims, the effect of
NROs on instability bounds is generically small whenever it can be reliably
computed.