title: Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole

abstract:
  We analyse the cosmology of a brane world model where a single brane carrying
the standard model fields forms the boundary of a 5-dimensional AdS bulk (the
Randall-Sundrum II scenario). We focus on the thermal radiation of bulk
gravitons, the formation of the bulk black hole, and the holographic AdS/CFT
definition of the RSII theory. Our detailed calculation of bulk radiation
reduces previous estimates to a phenomenologically acceptable, although
potentially visible level. In late cosmology, in which the Friedmann equation
depends linearly on the energy density \rho, only about 0.5% of energy density
is lost to the black hole or, equivalently, to the `dark radiation'
(\Omega_{d,N} \simeq 0.005 at nucleosynthesis). The preceding, unconventional
\rho^2 period can produce up to 5% dark radiation (\Omega_{d,N} <\sim 0.05).
The AdS/CFT correspondence provides an equivalent description of late RSII
cosmology. We show how the AdS/CFT formulation can reproduce the \rho^2
correction to the standard treatment at low matter density. However, the
4-dimensional effective theory of CFT + gravity breaks down due to higher
curvature terms for energy densities where \rho^2 behaviour in the Friedmann
equation is usually predicted. We emphasize that, in going beyond this energy
density, the microscopic formulation of the theory becomes essential. For
example, the pure AdS_5 and string-motivated AdS_5\timesS^5 definitions differ
in their cosmological implications.


title: Affleck-Dine baryogensis in large extra dimensions

abstract:
  Baryogenesis in the models where the fundamental scale is as low as TeV in
the context of large extra dimensions is a challenging problem. The requirement
for the departure from thermal equilibrium necessarily ties any low scale
baryogenesis with that of a successful inflationary model which automatically
provides the out of equilibrium condition after the end of inflation. However,
it is also noticeable that in these models the reheat temperature of the
Universe is strongly constrained from the overproduction of Kaluza-Klein modes,
which enforces a very low reheat temperature. In this paper we describe a
possible scenario for baryogenesis which has a similar characteristics of an
Affleck-Dine field. We notice that in order to have an adequate baryon to
entropy ratio one requires to promote this Affleck-Dine field to reside in the
bulk.


title: The Photon Structure Function at Small-x

abstract:
  It is shown that recent small-x measurements of the photon structure function
F_2^{\gamma}(x,Q^2) by the LEP-OPAL collaboration are consistent with
parameter-free QCD predictions at all presently accessible values of Q^2.


title:
Renormalon resummation and exponentiation of soft and collinear gluon
  radiation in the thrust distribution

abstract:
  The thrust distribution in e+e- annihilation is calculated exploiting its
exponentiation property in the two-jet region t = 1-T << 1. We present a
general method (DGE) to calculate a large class of logarithmically enhanced
terms, using the dispersive approach in renormalon calculus. Dressed Gluon
Exponentiation is based on the fact that the exponentiation kernel is
associated primarily with a single gluon emission, and therefore the exponent
is naturally represented as an integral over the running coupling. Fixing the
definition of Lambda is enough to guarantee consistency with the exact exponent
to next-to-leading logarithmic accuracy. Renormalization scale dependence is
avoided by keeping all the logs. Sub-leading logs, that are usually neglected,
are factorially enhanced and are therefore important. Renormalization-group
invariance as well as infrared renormalon divergence are recovered in the sum
of all the logs. The logarithmically enhanced cross-section is evaluated by
Borel summation. Renormalon ambiguity is then used to study power corrections
in the peak region Qt \gsim Lambda, where the hierarchy between the renormalon
closest to the origin (~1/Qt) and others (~1/(Qt)^n) starts to break down. The
exponentiated power-corrections can be described by a shape-function, as
advocated by Korchemsky and Sterman. Our calculation suggests that the even
central moments of the shape-function are suppressed. Good fits are obtained
yielding alpha_s^{MSbar} (M_Z) = 0.110 \pm 0.001, with a theoretical
uncertainty of ~5%.


title:
Muon anomalous magnetic moment, $B\to X_s \gamma$ and dark matter
  detection in the string models with dilaton domination

abstract:
  We consider the muon anomalous magnetic moment $a_{\mu}$ in the string models
with dilaton domination with two different string scales : the usual GUT scale
and the intermediate scale. After imposing the direct search limits on the
lightest neutral Higgs and SUSY particle masses and the lightest neutralino
LSP, the $a_{\mu}^{\rm SUSY}$ is predicted to be less than $65 (55) \times
10^{-10}$ for $M_{string} = 2 \times 10^{16}$ GeV ($3 \times 10^{11}$ GeV). If
we further impose the $B\to X_s \gamma$ branching ratio, the predicted
$a_{\mu}^{\rm SUSY}$ becomes lower to $35 \times 10^{-10}$ for intermediate
string scale. The resulting LSP - proton scattering cross section is less than
$\sim 10^{-7}$ pb, which is below the sensitivity of the current direct dark
matter search experiments, but could be covered by future experiments.


title: Explosive Decomposition in Ultrarelativistic Heavy Ion Collision

abstract:
  Recent results from Au+Au collisions at BNL-RHIC energy hint at explosive
hadron production at the QCD transition rather than soft hydrodynamic
evolution. We speculate that this is due to a rapid variation of the effective
potential for QCD close to Tc. Performing real-time lattice simulations of an
effective theory we show that the fast evolution of the potential leads to
``explosive'' spinodal decomposition rather than bubble nucleation or critical
slowing down.


title:
$\nu - K^0$ Analogy, Dirac-Majorana Neutrino Duality and the Neutrino
  Oscillations

abstract:
  The intent of this paper is to convey a new primary physical idea of a
Dirac-Majorana neutrino duality in relation to the topical problem of neutrino
oscillations. In view of the new atmospheric, solar and the LSND neutrino
oscillation data, the Pontecorvo $\nu - K^0$ oscillation analogy is generalized
to the notion of neutrino duality with substantially different physical meaning
ascribed to the long-baseline and the short-baseline neutrino oscillations. At
the level of CP-invariance, the suggestion of dual neutrino properties defines
the symmetric two-mixing-angle form of the widely discussed four-neutrino
$(2+2)$-mixing scheme, as a result of the lepton charge conservation selection
rule and a minimum of two Dirac neutrino fields. With neutrino duality, the
two-doublet structure of the Majorana neutrino mass spectrum is a vestige of
the two-Dirac-neutrino origin. The fine neutrino mass doublet structure is
natural because it is produced by a lepton charge symmetry violating
perturbation on a zero-approximation system of two twofold mass-degenerate
Dirac neutrino-antineutrino pairs. A set of inferences related to the neutrino
oscillation phenomenology in vacuum is considered.


title: Eta' Mass and Chiral Symmetry Breaking at Large Nc and Nf

abstract:
  We propose a method for implementing the large-Nc, large-Nf limit of QCD at
the effective Lagrangian level. Depending on the value of the ratio Nf/Nc,
different patterns of chiral symmetry breaking can arise, leading in particular
to different behaviors of the eta-prime mass in the combined large-N limit.


title: Spontaneously Generated Gauge Invariance

abstract:
  We argue that the non-observability of the spontaneous breakdown of Lorentz
symmetry (SBLS) caused by the vacuum expectation values of vector fields could
provide the origin of all internal symmetries observed. Remarkably, the
application of this principle to the most general relativistically invariant
Lagrangian, with arbitrary couplings for all the fields involved, leads by
itself to the appearance of a symmetry and, what is more, to the massless
vector field(s) gauging this symmetry. A simple model for the SBLS based on
massive vector and real scalar field interactions is considered; it is found
that spontaneously broken gauge symmetries could also appear, when SBLS happens
and is required to be physically unobservable.


title:
The new (g-2) for muon measurement and limits on the light Higgs bosons
  in 2HDM (II)

abstract:
  We discuss how new data for a_{mu}= (g-2)_{mu}/2 improve constraints on new
physics. Using two types of estimations of a_{mu}^{had} (Davier & H"{o}cker
(case A) and Jegerlehner2000 (case B)) we evaluate 95% CL intervals for a new
contribution, which can be used to constrain any model beyond the Standard
Model. We apply these intervals to the general 2HDM ("Model II"), where up to
now one light neutral Higgs particle, h or A, was allowed by the data. Assuming
that only one Higgs boson contributes to a_{mu}^{2HDM} the two-loop calculation
based on the case A leads to the exclusion of scalar $h$ while a pseudoscalar
with mass between 10 and 70 GeV (for tan beta > 20) is allowed. For case B the
upper limits for tan beta for both scalar and pseudoscalar are obtained.


title:
Enhancement of Radiatively Induced Magnetic Moment Form-Factors of Muon:
  an Effective Lagrangian Approach

abstract:
  Using an effective lagrangian approach, we identify a class of models in
which the loop-induced magnetic moment form-factors of muon are enhanced by
possibly large factors
(\Lambda^2_F/\Lambda^2)(m_\tau/m_\mu)\ln(m_\tau^2/\Lambda^2) or
(\Lambda^2_F/\Lambda^2)\ln(m_\mu^2/\Lambda^2), where \Lambda is the scale of
new physics and \Lambda_F is the Fermi scale. These follow from left- and
right-chirality mixing dimension-8 operators which for relatively small
\Lambda, as required to explain the new (g_\mu-2) measurement, dominate over
dimension-6 operators. Thus significant enhancement of new physics
contributions to (g_\mu-2) and, in the presence of intergenerational couplings,
also to the \mu\to e\gamma decay rate is possible. We discuss the compatibility
of the (g_\mu-2) and \mu\to e\gamma experimental data in this case and comment
on the enhancement of the electron anomalous magnetic moment. An explicit model
is presented to illustrate the general results.


title: Exclusive decay of $1^{- -}$ heavy quarkonium into photon and two pions

abstract:
  We study the exclusive decay of $1^{--}$ heavy quarkonium into one photon and
two pions in the kinematic region, where the two-pion system has a invariant
mass which is much smaller than the mass of heavy quarkonium. Neglecting
effects suppressed by the inverse of the heavy quark mass, the decay amplitude
can be factorized, in which the nonperturbative effect related to heavy
quarkonium is represented by a non-relativistic QCD matrix element, and that
related to the two pions is represented by a distribution amplitude of two
gluons in the isoscalar pion pair. By taking the asymptotic form for the
distribution amplitude and by using chiral perturbative theory we are able to
obtain numerical predictions for the decay. Numerical results show that the
decay of $\jpsi$ can be observed at BEPC and at CESR. Experiment observation of
this process in this kinematic region at BEPC and CESR can provide information
about how gluons are converted into the two pions and may supply a unique
approach to study $ I = 0$ s-wave $\pi \pi$ scattering.


title: Toward neutrino texture dominated by Majorana lefthanded mass matrix

abstract:
  A form of mixing matrix for three active and three sterile, conventional
Majorana neutrinos is proposed. Its Majorana lefthanded part arises from the
popular bimaximal mixing matrix for three active neutrinos that works
satisfactorily in solar and atmospheric experiments if the LSND effect is
ignored. One of three sterile neutrinos, effective in the Majorana righthanded
and Dirac parts of the proposed mixing matrix, is responsible perturbatively
for the possible LSND effect by inducing one of three extra neutrino mass
states to exist actively. The corresponding form of neutrino mass matrix is
derived. If all three extra neutrino mass states get vanishing masses, the
neutrino mass matrix is dominated by its specific Majorana lefthanded part.
Then, the observed qualitative difference between mixings of neutrinos and down
quarks may be connected with this Majorana lefthanded dominance realized for
neutrinos.


title:
Color superconductivity and nondecoupling phenomena in 2+1 dimensional
  QCD

abstract:
  The possibility of generating a color superconducting state in 2+1
dimensional QCD is analyzed. The gap equation in the leading, hard-dense loop
improved, one-gluon exchange approximation is derived and solved. The magnitude
of the order parameter is proportional to a power of the coupling constant. For
an asymptotically large chemical potential, a qualitatevely new (with respect
to the 3+1 dimensional case) phenomenon of nondecoupling of the fermion pairing
dynamics from the infrared one is revealed and discussed.


title: A simplified model for monopole catalysis of nucleon decay

abstract:
  We present a simple model where a nucleon is treated as the Skyrmion, both
monopole and Skyrmion are smooth solutions of the classical field equations,the
baryon number non-conservation is explicitly built in and is due to the
classical analogue of the triangle anomaly, and there is no necessity to
consider leptons. We show by numerical analysis that there are no static
classical solutions with non-zero baryon number on top of the monopole, i.e.,
that the monopole catalysis of Skyrmion decay indeed proceeds classically.


title: Leptogenesis in Smooth Hybrid Inflation

abstract:
  We present a concrete supersymmetric grand unified model based on the
Pati-Salam gauge group SU(4)_c x SU(2)_L x SU(2)_R and leading naturally to
smooth hybrid inflation, which avoids the cosmological disaster encountered in
the standard hybrid inflationary scenario from the overproduction of monopoles
at the end of inflation. Successful `reheating' which satisfies the gravitino
constraint takes place after the termination of inflation. Also, adequate
baryogenesis via a primordial leptogenesis occurs consistently with the solar
and atmospheric neutrino oscillation data as well as the SU(4)_c symmetry.


title:
Calculation of the K^0-\bar{K}^0 mixing parameter via the QCD sum rules
  at finite energies

abstract:
  The QCD finite energy sum rules method is used to show that the parameter of
the K^0-\bar{K}_0 mixing \hat{B} is mainly determined by the value of g m_s<
\bar{d} G_{\mu\nu} \sigma_{\mu\nu} d > and the vacuum expectation values of
four-quark operators. Assuming the hypothesis of vacuum dominance and/or
unitarity symmetry to estimate latter, it is found that \hat{B}=1.2\pm 0.1.
(The updated (March 2001) prediction reads \hat{B} = 1.0 +- 0.1 (for more
details, see Comments after the main text).


title: Hybrid Inflation and Baryogenesis at the TeV Scale

abstract:
  We consider the construction of inverted hybrid inflation models in which the
vacuum energy during inflation is at the TeV scale, and the inflaton couples to
the Higgs field. Such models are of interest in the context of some recently
proposed models of electroweak baryogenesis. We demonstrate how constraints on
these models arise from quantum corrections, and how self-consistent examples
may be constructed, albeit at the expense of fine-tuning. We discuss two
possible ways in which the baryon asymmetry of the universe may be produced in
these models. One of them is based on preheating and a consequent non-thermal
electroweak symmetry restoration and the other on the formation of Higgs
winding configurations by the Kibble mechanism at the end of inflation.


title: BCS vs Overhauser pairing in dense (2+1)d QCD

abstract:
  We compare the BCS and Overhauser effect as competing mechanisms for the
destabilization of the quark Fermi surface at asymptotically large chemical
potential, for the special case of 2 space and 1 time dimension. We use the
framework of perturbative one-gluon exchange, which dominates the pairing at
$\mu/g^2\gg 1$. With screening in matter, we show that in the weak coupling
limit the Overhauser effect can compete with the BCS effect only for a
sufficiently large number of colors. Both the BCS and the Overhauser gaps are
of order $g^{4}/\mu$ in Landau gauge.


title:
Renormalization of an effective Light-Cone QCD-inspired theory for the
  Pion and other Mesons

abstract:
  The renormalization of the effective QCD-Hamiltonian theory for the
quark-antiquark channel is performed in terms of a renormalized or fixed-point
Hamiltonian that leads to subtracted dynamical equations. The fixed
point-Hamiltonian brings the renormalization conditions as well as the
counterterms that render the theory finite. The approach is renormalization
group invariant. The parameters of the renormalized effective QCD-Hamiltonian
comes from the pion mass and radius, for a given constituent quark mass. The 1s
and excited 2s states of $\bar u q$ are calculated as a function of the mass of
the quark $q$ being s, c or b, and compared to the experimental values.


title:
Centrality dependence of multiplicity, transverse energy, and elliptic
  flow from hydrodynamics

abstract:
  The centrality dependence of the charged multiplicity, transverse energy, and
elliptic flow coefficient is studied in a hydrodynamic model, using a variety
of different initializations which model the initial energy or entropy
production process as a hard or soft process, respectively. While the charged
multiplicity depends strongly on the chosen initialization, the p_t-integrated
elliptic flow for charged particles as a function of charged particle
multiplicity and the p_t-differential elliptic flow for charged particles in
minimum bias events turn out to be almost independent of the initial energy
density profile.


title:
Can extra dimensions accessible to the SM explain the recent measurement
  of anomalous magnetic moment of the muon?

abstract:
  We investigate whether models with flat extra dimensions in which SM fields
propagate can give a significant contribution to the anomalous magnetic moment
of the muon (MMM). In models with only SM gauge and Higgs fields in the bulk,
the contribution to the MMM from Kaluza-Klein (KK) excitations of gauge bosons
is very small. This is due to the constraint on the size of the extra
dimensions from tree-level effects of KK excitations of gauge bosons on
precision electroweak observables such as Fermi constant. If the quarks and
leptons are also allowed to propagate in the (same) bulk (``universal'' extra
dimensions), then there are no contributions to precision electroweak
observables at tree-level. However, in this case, the constraint from one-loop
contribution of KK excitations of (mainly) the top quark to T parameter again
implies that the contribution to the MMM is small. We show that in models with
leptons, electroweak gauge and Higgs fields propagating in the (same) bulk, but
with quarks and gluon propagating in a sub-space of this bulk, both the above
constraints can be relaxed. However, with only one Higgs doublet, the
constraint from the process b -> s gamma requires the contribution to the MMM
to be smaller than the SM electroweak correction. This constraint can be
relaxed in models with more than one Higgs doublet.


title:
Exclusive decay of $J/\Psi$ into a lepton pair combined with light
  hadrons

abstract:
  We study the exclusive decay of $J/\Psi$ into a lepton pair combined with
light hadrons in the kinematic region, specified by that the total energy of
the light hadrons is much smaller than $m_c$, the mass of the $c$-quark. In
this region, the nonperturbaive effect related to $J/\Psi$ and that related to
the light hadrons can be separated, the former is represented by a NRQCD matrix
element, while the later is represented by a matrix element of a correlator of
electric chromofields. The results are obtained in a axial gauge by assumming
that contributions from two-gluon emmssion are dominant. But we can show that
these results can be obtained without the assumption in arbitrary gauges. A
discussion of the results are presented.


title: A QCD-Analysis for Radiative Decays of $\Upsilon$ into $f_2(1270)$

abstract:
  We perform a QCD analysis for the radiative decay of a heavy $^3S_1$
quarkonium into the tensor meson $f_2(1270)$. We make an attempt to separate
the nonperturbative effect related to the quarkonium and that related to the
tensor meson, the former is represented by NRQCD matrix elements, while the
later is parameterized by distribution amplitudes of gluons in the tensor meson
at twist-2 level and at twist-3 level. We find that at twist-2 level the
helicity $\lambda$ of the tensor meson can be 0 and 2 and the amplitude with
$\lambda =2$ is suppressed. At twist-3 level the tensor meson can have $\lambda
=1$. A comparison with experiment is made, an agreement of our results with
experiment can be found. We also briefly discuss the radiative decay into
$\eta$ and obtain a prediction for $\Upsilon\to\gamma+\eta$.


title: Parametrization of nuclear parton distributions

abstract:
  Optimum nuclear parton distributions are obtained by analyzing available
experimental data on electron and muon deep inelastic scattering (DIS). The
distributions are given at Q^2=1 GeV^2 with a number of parameters, which are
determined by a chi^2 analysis of the data. Valence-quark distributions are
relatively well determined at medium x, but they are slightly dependent on the
assumed parametrization form particularly at small x. Although antiquark
distributions are shadowed at small x, their behavior is not obvious at medium
x from the F_2 data. The gluon distributions could not be restricted well by
the inclusive DIS data; however, the analysis tends to support the gluon
shadowing at small x. We provide analytical expressions and computer
subroutines for calculating the nuclear parton distributions, so that other
researchers could use them for applications to other high-energy nuclear
reactions.


title: Irreversibility and dissipation in neutral B-meson decays

abstract:
  The propagation and decay of neutral B-mesons can be described in terms of
quantum dynamical semigroups; they provide generalized time-evolutions that
take into account possible non-standard effects leading to loss of phase
coherence and dissipation. These effects can be fully parametrized in terms of
six phenomenological constants. A detailed analysis of selected B-meson decays
shows that present and future dedicated experiments, both at colliders and
B-factories, will be able to put stringent bounds on these non-standard
parameters.


title: Vacuum energy of CP(1) solitons

abstract:
  The vacuum energy of two CP(1) solitons on a torus is computed numerically. A
numerical technique for zeta-function regularisation is proposed to remove the
divergences of the vacuum energy. After performing the numerical
regularisation, we observe the effect of the vacuum energy on the two soliton
interactions.


title: Quantum Electrodynamics of the Helium Atom

abstract:
  Using singlet S states of the helium atom as an example, I describe precise
calculation of energy levels in few-electron atoms. In particular, a complete
set of effective operators is derived which generates O(m*alpha^6) relativistic
and radiative corrections to the Schr"odinger energy. Average values of these
operators can be calculated using a variational Schr"odinger wave function.


title: How to Describe Neutrino Mixing and CP Violation

abstract:
  We present a classification of possible parametrizations of the 3x3 lepton
flavor mixing matrix in terms of the rotation and phase angles. A particular
parametrization, which is most convenient to describe the observables of
neutrino oscillations and that of the neutrinoless double beta decay, is
studied in detail. The possibility to determine the Dirac- and Majorana-type
CP-violating phases are also discussed.


title: Low-scale inflation

abstract:
  We show that the scale of the inflationary potential may be the electroweak
scale or even lower, while still generating an acceptable spectrum of
primordial density perturbations. Thermal effects readily lead to the initial
conditions necessary for low scale inflation to occur, and even the moduli
problem can be evaded if there is such an inflationary period. We discuss how
low scale inflationary models may arise in supersymmetric theories or in
theories with large new space dimensions.


title: $SU(3)_c\otimes SU(3)_L\otimes U(1)_X$ as an $E_6$ Subgroup

abstract:
  An extension of the Standard Model to the local gauge group $SU(3)_c\otimes
SU(3)_L\otimes U(1)_X$ which is a subgroup of the electroweak-strong
unification group $E_6$ is analyzed. The mass scales, the gauge boson masses,
and the masses for the spin 1/2 particles in the model are calculated. The mass
differences between the up and down quark sectors, between the quarks and
leptons, and between the charged and neutral leptons in one family are
explained as a consequence of mixing of ordinary with exotic fermions implied
by the model. By using experimental results we constrain the mixing angle
between the two neutral currents and the mass of the additional neutral gauge
boson to be $-0.0015 \leq \sin\theta \leq 0.0048$ and $600 GeV \leq M_{Z_2}$ at
95% CL. The existence of a Dirac neutrino for each family with a mass of the
order of the electroweak mass scale is predicted.


title: The Logarithmic Slope in Diffractive DIS

abstract:
  The logarithmic slope of diffractive structure function is a potential
observable to separate the hard and soft contributions in diffraction, allowing
to disentangle the QCD dynamics. In this paper we extend our previous analyzes
and calculate the diffractive logarithmic slope for three current approaches in
the literature: (i) the Bartels-Wusthoff model, based on perturbative QCD, (ii)
the CKMT model, based on Regge theory and (iii) the Golec Biernat - Wusthoff
model which assumes that the saturation phenomena is present in the HERA
kinematic region. We analyze the transition region of small to large momentum
transfer and verify that future experimental results on the diffractive
logarithmic slope could discriminate between these approaches.


title:
Time-Evolution of a Collective Meson Field by the Use of a Squeezed
  State

abstract:
  A time-evolution of quantum meson fields is investigated in a linear sigma
model by means of the time-dependent variational approach with a squeezed
state. The chiral condensate, which is a mean field of the quantum meson
fields, and quantum fluctuations around it are treated self-consistently in
this approach. The attention is payed to the description of the relaxation
process of the chiral condensate, where the energy stored in the mean field
configuration flows to the fluctuation modes. It is shown that the quantum
fluctuations play an important role to describe this relaxation process.


title:
The anomalous magnetic moment of muon: from the E821 experiment to
  bilepton masses

abstract:
  Bilepton masses in the 3-3-1 models and the recently announced E821
experiment result are discussed. We get bounds on the bilepton masses 243 GeV
$\leq M_Y \leq $ 357 GeV in the minimal model and 70 GeV $\leq M_Y \leq $ 115
GeV in the model with right-handed neutrinos.


title: The Cosmological Moduli Problem and Preheating

abstract:
  Many models of supersymmetry breaking, in the context of either supergravity
or superstring theories, predict the presence of particles with
Planck-suppressed couplings and masses around the weak scale. These particles
are generically called moduli. The excessive production of moduli in the early
Universe jeopardizes the successful predictions of nucleosynthesis. In this
paper we show that the efficient generation of these dangerous relics is an
unescapable consequence of a wide variety of inflationary models which have a
preheating stage. Moduli are generated as coherent states in a novel way which
differs from the usual production mechanism during parametric resonance. The
corresponding limits on the reheating temperature are often very tight and more
severe than the bound of 10^9 GeV coming from the production of moduli via
thermal scatterings during reheating.


title: Non-Newtonian gravity confronting models with large extra dimensions

abstract:
  We discuss the interplay between direct constraints on non-Newtonian gravity
and particle-physics bounds in models with large extra dimensions. Existing and
future bounds and the most effective ways of further testing these models in
gravitational experiments are compared and discussed.


title: New Pattern of Chiral Symmetry Restoration

abstract:
  In this talk I summarize our recent works on the chiral symmetry restoration
in the large flavor QCD using the hidden local symmetry (HLS) as an effective
field theory of QCD. Bare parameters in the HLS are determined by matching the
HLS with QCD at the matching scale through the Wilsoninan matching conditions.
This Wilsonian matching leads to the vector manifestation of the Wigner
realization of the chiral symmetry in which the symmetry is restored by the
massless degenerate pion (and its flavor partners) and rho meson (and its
flavor partners) as the chiral partner.


title: Semi-simple group unification in the supersymmetric brane world

abstract:
  The conventional supersymmetric grand unified theories suffer from two
serious problems, the large mass splitting between doublet and triplet Higgs
multiplets, and the too long lifetime of the proton. A unification model based
on a semi-simple group SU(5)_{GUT} \times U(3)_H has been proposed to solve
both of the problems simultaneously. Although the proposed model is perfectly
consistent with observations, there are various mysteries. In this paper, we
show that such mysterious features in the original model are naturally
explained by embedding the model into the brane world in a higher dimensional
space-time. In particular, the relatively small gauge coupling constant of the
SU(5)_{GUT} at the unification energy scale is a consequence of relatively
large volume of extra dimensions. Here, we put the SU(5)_{GUT} gauge multiplet
in a 6-dimensional bulk and assume all fields in the U(3)_H sector to reside on
a 3-dimensional brane located in the bulk. On the other hand, all chiral
multiplets of quarks, leptons and Higgs are assumed to reside on a 3-brane at a
T^2/Z_4 orbifold fixed point. The quasi-N=2 supersymmetry in the hypercolor
U(3)_H sector is understood as a low-energy remnant of the N=4 supersymmetry in
a 6-dimensional space-time. We further extend the 6-dimensional model to a
10-dimensional theory. Possible frameworks of string theories are also
investigated to accommodate the present brane-world model. We find that the
type IIB string theory with D3-D7 brane structure is an interesting candidate.


title: Neutrino oscillations with three flavors in matter of varying density

abstract:
  In this paper, we discuss the evolution operator and the transition
probabilities expressed as functions of the vacuum mass squared differences,
the vacuum mixing angles, and the matter density parameter for three flavor
neutrino oscillations in matter of varying density in the plane wave
approximation. The applications of this to neutrino oscillations in a model of
the Earth's matter density profile, step function matter density profiles,
constant matter density profiles, linear matter density profiles, and finally
in a model of the Sun's matter density profile are discussed. We show that for
matter density profiles, which do not fluctuate too much, the total evolution
operator consisting of $n$ operators can be replaced by one single evolution
operator in the semi-classical approximation.


title:
Estimates of the physical meson masses by an effective light-cone
  Hamiltonian

abstract:
  A recent renormalization group analysis of the effective light-cone
Hamiltonian yields 5 flavor masses and 2 mass shifts as free parameters. These
are determined in the present note and used to calculate the masses of all 30
physical mesons (The topped mesons have been omitted). The agreement between
experiment and theoretical estimate is quite satisfactory over the whole
dynamical range, from the lightest pseudo-scalar mesons like the pion up to the
heaviest vector mesons like the upsilon. Evidence for an additive quark model
is given and for how the concept of isospin is realized in a gauge field theory
such as QCD.


title:
On the flavor mixing by a Light-Cone Hamiltonian and the isotopic spin
  in QCD

abstract:
  The structure of an effective light-cone Hamiltonian as recently derived is
analyzed with emphasis on its prediction for flavor mixing in physical mesons.
In a (perhaps over-simplified) model with one adjustable parameter, the
empirical masses of all 25 pseudo-scalar mesons which are possible for 5
flavors are reproduced (almost) quantitatively. These results are coupled with
explicit numerical estimates of flavor mixing. In the present approach, the
well-known mass degeneracy of the pion triplet is caused by the mass degeneracy
of the up and down quark.


title: Gauge singlet renormalisation in softly-broken supersymmetric theories

abstract:
  We consider the renormalisation of a softly-broken supersymmetric theory with
singlet fields and a superpotential with a linear term. We show that there
exist exact beta-functions for both the linear term in the superpotential and
the associated linear term in the Lagrangian. We also construct exact
renormalisation group invariant trajectories for these terms, corresponding to
the conformal anomaly solution for the soft masses and couplings.


title:
Charged-Lepton-Flavour Violation in the CMSSM in View of the Muon
  Anomalous Magnetic Moment

abstract:
  We use the BNL E821 measurement of g - 2, the anomalous magnetic moment of
the muon, to normalize, within a supersymmetric GUT framework, constrained MSSM
(CMSSM) predictions for processes that violate charged-lepton flavour
conservation, including mu to e gamma, mu to e conversion and K^0_L to mu e. We
illustrate our analysis with two examples of lepton mass matrix textures
motivated by data on neutrino oscillations. We find that mu to e gamma may well
occur at a rate within one or two (two or three) orders of magnitude of the
present experimental upper limit if g - 2 is within the one- (two-)standard
deviation range indicated by E821. We also find that mu to e conversion is
likely to occur at rate measurable by MECO, and there is a chance that K^0_L to
mu e may be observable in an experiment using an intense proton source.


title: Novel features of diffraction at the LHC

abstract:
  Interest and problems in the studies of diffraction at LHC are highlighted.
Predictions for the global characteristics of proton-proton interactions at the
LHC energy are given. Potential discoveries of the antishadow scattering mode
and diffractive scattering conjugated with high--$E_T$ jets are discussed.


title: On the measurement of leptonic CP violation

abstract:
  We show that the simultaneous determination of the leptonic CP-odd phase
$\delta$ and the angle $\theta_{13}$ from the subleading transitions
$\nu_e\to\nu_\mu$ and ${\bar\nu}_e\to{\bar\nu}_\mu$ results generically, at
fixed neutrino energy and baseline, in two degenerate solutions. In light of
this, we refine a previous analysis of the sensitivity to leptonic CP violation
at a neutrino factory, in the LMA-MSW scenario, by exploring the full range of
$\delta$ and $\theta_{13}$.
  Furthermore, we take into account the expected uncertainties on the solar and
atmospheric oscillation parameters and in the average Earth matter density
along the neutrino path. An intermediate baseline of O(3000) km is still the
best option to tackle CP violation, although a combination of two baselines
turns out to be very important in resolving degeneracies.


title: The NNLO tau+tau- Production Cross Section Close to Threshold

abstract:
  The threshold behaviour of the cross section sigma(e+e+ -> tau+tau-) is
analysed, taking into account the known higher-order corrections. At present,
this observable can be determined to next-to-next-to-leading order (NNLO) in a
combined expansion in powers of alpha_s and fermion velocities.


title: Reggeization in High Energy QCD

abstract:
  We study QCD in the regime of high parton density arising in hadronic
collisions at large center-of-mass energy. The n-gluon amplitudes of the
generalized leading logarithmic approximation are investigated. We find
identities relating amplitudes with different numbers of gluons in the
t-channel. These identities constrain the reggeization of the gluon in high
energy QCD. The tensors describing the reggeization of a gluon in color space
are identified.


title:
Exclusive B -> K^* l^+ l^- decay with polarized K^* and new physics
  effects

abstract:
  Using the most general, model independent effective Hamiltonian, the
branching ratio of the (B -> K^* l^+ l^-) decay, when K^* meson is
longitudinally or transversally polarized, is presented. The dependence of the
branching ratio on the new Wilson coefficients, when K^* meson is polarized, is
studied. It is observed that the branching ratio is very sensitive to the
vector and tensor type interactions, which will be useful in search of new
physics beyond the Standard Model.


title:
Choosing integration points for QCD calculations by numerical
  integration

abstract:
  I discuss how to sample the space of parton momenta in order to best perform
the numerical integrations that lead to a calculation of three jet cross
sections and similar observables in electron-positron annihilation.


title: Low energy analysis of pi N --> pi N

abstract:
  We derive a representation for the pion nucleon scattering amplitude that is
valid to the fourth order of the chiral expansion. To obtain the correct
analytic structure of the singularities in the low energy region, we have
performed the calculation in a relativistic framework (infrared
regularization). The result can be written in terms of functions of a single
variable. We study the corresponding dispersion relations and discuss the
problems encountered in the straightforward nonrelativistic expansion of the
infrared singularities. As an application, we evaluate the corrections to the
Goldberger-Treiman relation and to the low energy theorem that relates the
value of the amplitude at the Cheng-Dashen point to the \sigma-term. While
chiral symmetry does govern the behaviour of the amplitude in the vicinity of
this point, the representation for the scattering amplitude is not accurate
enough to use it for an extrapolation of the experimental data to the
subthreshold region. We propose to perform this extrapolation on the basis of a
set of integral equations that interrelate the lowest partial waves and are
analogous to the Roy equations for \pi\pi scattering.


title: Nucleon Decay Matrix Elements from Lattice QCD

abstract:
  We present a GUT-model-independent calculation of hadron matrix elements for
all dimension-six operators associated with baryon number violating processes
using lattice QCD. Our results cover all the matrix elements required to
estimate the partial lifetimes of (proton,neutron)$\to$($\pi,K,\eta$) +(${\bar
\nu},e^+,\mu^+$) decay modes. We point out the necessity of disentangling two
form factors that contribute to the matrix elements; previous calculations did
not make the separation, which led to an underestimate of the physical matrix
elements. With a correct separation, we find that the matrix elements have
values 3-5 times larger than the smallest estimates employed in
phenomenological analyses of the nucleon decays, which gives stronger
constraints on GUT models. We also find that the values of the matrix elements
are comparable with the tree-level predictions of chiral Lagrangian.


title:
The Interplay between Neutrinos and Charged Leptons in the Minimal
  SU(3)_LxU(1)_N Gauge Model

abstract:
  In the minimal SU(3)_LxU(1)_N gauge model with a global L_e-L_mu-L_tau (=L')
symmetry and a discrete Z_4 symmetry, it is found that the interplay between
neutrinos and charged leptons contained in triplets of \psi^i=(\nu^i_L,
\ell^i_L, \ell^{ci}_L) (i=1,2,3) naturally leads to the large mixing angle
(LMA) MSW solution. The model includes two (anti)sextet Higgs scalars, S^(0)
with L'=0 and S^(+) with L'=2, which, respectively, couple to \psi^1\psi^{2,3}
for the electron mass and masses of atmospheric neutrinos and to
\psi^{2,3}\psi^{2,3} for the \mu- and \tau-masses and one-loop radiative
neutrino masses relevant to solar neutrinos. This mechanism is realized by
utilizing an additional residual discrete symmetry supplied by explicitly
broken L', which guarantees the absence of tree-level neutrino mass terms of
the \psi^{2,3}\psi^{2,3}-type. Pure rotation effects due to the diagonalization
of neutrino and charged-lepton mass matrices are estimated to yield \Delta
m^2_\odot/\Delta m^2_{atm} \leq (m_e/m_\mu)^{3/2}=O(10^{-4}) but the radiative
effects supersede the rotation effects to yield \Delta m^2_\odot/\Delta
m^2_{atm}=O(10^{-2}) as the LMA solution.


title: Spin transfer in high energy fragmentation processes

abstract:
  We point out that measuring longitudinal polarizations of different hyperons
produced in lepton induced reactions are ideal to study the spin transfer of
the fragtmenting quark to produced hadron in high energy hadronization
processes. We briefly summarize the method used in calculating the hyperon
polarizations in these processes, then present some of the results for e+e- and
e-p or \nu p reactions obtained using two different pictures for the spin
structure of hyperon: that drawn from polarized deep inelastic lepton-nucleon
scattering data or that using SU(6) symmetric wave functions. The results show
in particular that measurements of such polarizations should provide useful
information to the question of which picture is more suitable in describing the
spin effects in the fragmentation processes.


title: Spin alignment of vector meson in e+e- annihilation at Z0 pole

abstract:
  We calculate the spin density matrix of the vector meson produced in e+e-
annihilation at Z^0 pole. We show that the data imply a significant
polarization for the antiquark which is created in the fragmentation process of
the polarized initial quark and combines with the fragmenting quark to form the
vector meson. The direction of polarization is opposite to that of the
fragmenting quark and the magnitude is of the order of 0.5. A qualitative
explanation of this result based on the LUND string fragmentation model is
given.


title:
Energy Dependence of the Contribution of Pion Exchange to
  Large-Rapidity-Gap Events in Deep Inelastic Scattering

abstract:
  We study the energy dependence of the contribution of pion exchange to
large-rapidity-gap events in deep inelastic scattering. The results show that
this contribution can be quite significant at low energy and that the LRG
events observed by E665 collaboration in \mu Xe and \mu D interactions at 490
$GeV$ can be reasonably well described in terms of meson exchange. We also show
that the distribution of the maximum rapidity for all hadrons is quite
different from that for charged hadrons only and that the former exhibits also
shoulder-like structure for events at 490 $GeV$ similar to that at HERA.


title: Carlson-Goldman modes in the color superconducting phase of dense QCD

abstract:
  We predict the existence of the gapless Carlson-Goldman modes in the
color-flavor locked color superconducting phase of dense QCD. These modes
resemble Nambu-Goldstone modes of the superconducting phase below the critical
temperature where the Anderson-Higgs mechanism takes place. These modes exist
in the broken phase in the vicinity of the critical line. Their presence does
not eliminate the Meissner effect. The effect of Landau damping on the width of
the Carlson-Goldman modes is discussed.


title:
Comment on ``Infrared Fixed Point Structure in Minimal Supersymmetric
  Standard Model with Baryon and Lepton Number Violation"

abstract:
  We reconsider the Infrared Quasi Fixed Points which were studied recently in
the literature in the context of the Baryon and Lepton number violating Minimal
Supersymmetric Standard Model (hep-ph/0011274). The complete analysis requires
further care and reveals more structure than what was previously shown. The
formalism we develop here is quite general, and can be readily applied to a
large class of models.


title: QCD at small non-zero quark chemical potentials

abstract:
  We study the effects of small chemical potentials associated with the three
light quark flavors in QCD. We use a low-energy effective field theory that
solely relies on the symmetries of the QCD partition function. We find three
different phases: a normal phase, a pion superfluid phase and a kaon superfluid
phase. The two superfluid phases are separated by a first order phase
transition, whereas the normal phase and either of the superfluid phases are
separated by a second order phase transition. We compute the quark-antiquark
condensate, the pion condensate and the kaon condensate in each phase, as well
as the isospin density, the strangeness density, and the mass spectrum.


title:
Inflation with Low Reheat Temperature and Cosmological Constraint on
  Stable Charged Massive Particles

abstract:
  Abundance of stable charged massive particles (CHAMPs) is severely
constrained by their searches inside sea water. We examine whether inflation
with low reheat temperature can sufficiently dilute the abundance to evade this
severe bound on CHAMPs, by taking into account their production and
annihilation in a plasma during reheating phase. We argue that the abundance of
the CHAMPs with mass less than 1 TeV will exceed the experimental bound, ruling
out these CHAMPs, especially the possibility of the superpartner of tau lepton
as the stable lightest superparticle. On the other hand, it is found that the
CHAMP much heavier than 1 TeV can survive the bound, if the reheat temperature
is low enough.


title: How to observe fluctuating temperature?

abstract:
  We provide arguments that event-by-event (EBE) analysis of multiparticle
production data are ideal place to search for the possible fluctuation of
temperature characterizing hadronizing source in thermodynamical approach.


title: QCD string in light-light and heavy-light mesons

abstract:
  The spectra of light-light and heavy-light mesons are calculated within the
framework of the QCD string model, which is derived from QCD in the Wilson loop
approach. Special attention is payed to the proper string dynamics that allows
us to reproduce the straight-line Regge trajectories with the inverse slope
being 2\pi\sigma for light-light and twice as small for heavy-light mesons. We
use the model of the rotating QCD string with quarks at the ends to calculate
the masses of several light-light mesons lying on the lowest Regge trajectories
and compare them with the experimental data as well as with the predictions of
other models. The masses of several low-lying orbitally and radially excited
heavy--light states in the D, D_s, B, and B_s meson spectra are calculated in
the einbein (auxiliary) field approach, which has proven to be rather accurate
in various calculations for relativistic systems. The results for the spectra
are compared with the experimental and recent lattice data. It is demonstrated
that an account of the proper string dynamics encoded in the so-called string
correction to the interquark interaction leads to an extra negative
contribution to the masses of orbitally excited states that resolves the
problem of the identification of the D(2637) state recently claimed by the
DELPHI Collaboration. For the heavy-light system we extract the constants
\bar\Lambda, \lambda_1, and \lambda_2 used in Heavy Quark Effective Theory
(HQET) and find good agreement with the results of other approaches.


title: QCD factorization for the pion diffractive dissociation to two jets

abstract:
  We calculate the cross section of a pion diffraction dissociation in two jets
with large transverse momenta originating from a hard gluon exchange between
the pion constituents. To the leading logarithmic accuracy (in energy), the
contribution coming from small transverse separations between the quark and the
antiquark in the pion acquires the expected factorized form, the longitudinal
momentum distribution of the jets being proportional to the pion distribution
amplitude. The hard gluon exchange can in this case be considered as a part of
the unintegrated gluon distribution. Beyond the leading logarithms (in energy)
this proportionality does not hold. Moreover, the collinear factorization
appears to be broken by the end-point singularities. Remarkably enough, the
longitudinal momentum distribution of the jets for the non-factorizable
contribution is calculable, and turns out to be the same as for the
factorizable contribution with the asymptotic pion distribution amplitude.


title:
The Nystrom plus Correction Method for Solving Bound State Equations in
  Momentum Space

abstract:
  A new method is presented for solving the momentum-space Schrodinger equation
with a linear potential. The Lande-subtracted momentum space integral equation
can be transformed into a matrix equation by the Nystrom method. The method
produces only approximate eigenvalues in the cases of singular potentials such
as the linear potential. The eigenvalues generated by the Nystrom method can be
improved by calculating the numerical errors and adding the appropriate
corrections. The end results are more accurate eigenvalues than those generated
by the basis function method. The method is also shown to work for a
relativistic equation such as the Thompson equation.


title: Gamma Rays from Near-Solar WIMP Annihilations

abstract:
  If weakly-interacting massive particles (WIMPs) make up the galactic dark
matter halo, high densities of such particles would exist near massive bodies,
such as the sun. The resulting annihilations are believed to produce neutrinos,
gamma rays and other decay products. If any significant fraction of such
annihiliations occur outside of the sun itself, gamma rays may be observable by
detectors on Earth.
  This paper describes a calculation to determine the fraction of
solar-captured WIMP annihiliations which occur outside of the sun. The
implications of this result on experimental searches is also discussed. We find
that the prospect of detecting gamma rays from near-solar WIMP annihilations is
very poor.


title: Collider Verification of the Neutrino Mass Matrix in Two Scenarios

abstract:
  If the origin of neutrino mass is at the TeV energy scale, collider
experiments may in fact {\it map out} all the elements of the $3 \times 3$
neutrino mass matrix, up to an overall scale. Two examples \cite{mrs,ma01} are
discussed and one is related \cite{mr} to the muon anomalous magnetic moment.


title:
Confinement, Chiral Symmetry Breaking, and Axial Anomaly from Domain
  Formation at Intermediate Resolution

abstract:
  Based on general renormalization group arguments, Polyakov's loop-space
formalism, and recent analytical lattice arguments, suggesting, after Abelian
gauge fixing, a description of pure gluodynamics by means of a Georgi-Glashow
like model, the corresponding vacuum fields are defined in a non-local way.
Using lattice information on the gauge invariant field strength correlator in
full QCD, the resolution scale $\La_b$, at which these fields become relevant
in the vacuum, is determined. For SU(3) gauge theory it is found that
$\La_b\sim$ 2.4 GeV, 3.1 GeV, and 4.2 GeV for ($N_F=4, m_q=18$ MeV), ($N_F=4,
m_q=36$ MeV), and pure gluodynamics, repectively. Implications for the operator
product expansion of physical correlators are discussed. It is argued that the
emergence of magnetic (anti)monopoles in the vacuum at resolution $\La_b$ is a
direct consequence of the randomness in the formation of a low entropy Higgs
condensate. This implies a breaking of chiral symmetry and a proliferation of
the axial U(1) anomaly at this scale already. Justifying Abelian projection, a
decoupling of non-Abelian gauge field fluctuations from the dynamics occurs.
The condensation of (anti)monopoles at $\La_c<\La_b$ follows from the demand
that vacuum fields ought to have vanishing action at any resolution. As
monopoles condense they are reduced to their cores, and hence they become
massless. Apparently broken gauge symmetries at resolutions $\La_c<\La\le\La_b$
are restored in this process.


title: Impact of Muon Anomalous Magnetic Moment on Supersymmetric Models

abstract:
  The recent measurement of a_\mu =\frac{g_\mu -2}{2} by the E821 Collaboration
at Brookhaven deviates from the quoted Standard Model (SM) central value
prediction by 2.6\sigma. The difference between SM theory and experiment may be
easily accounted for in a variety of particle physics models employing weak
scale supersymmetry (SUSY). Other supersymmetric models are distinctly
disfavored. We evaluate a_\mu for various supersymmetric models, including
minimal supergravity (mSUGRA), Yukawa unified SO(10) SUSY GUTs, models with
inverted mass hierarchies (IMH), models with non-universal gaugino masses,
gauge mediated SUSY breaking models (GMSB), anomaly-mediated SUSY breaking
models (AMSB) and models with gaugino mediated SUSY breaking (inoMSB). Models
with Yukawa coupling unification or multi-TeV first and second generation
scalars are disfavored by the a_\mu measurement.


title: Three-Neutrino MSW Effect and the LNW Mass Matrix

abstract:
  We review recent work on analytical solutions to the MSW equations for three
neutrino flavours, for exponential and linear potentials. An application to a
particular mass matrix is also discussed. The three neutrino masses are
determined, respectively, to be 0.001--0.004, and roughly 0.01 and 0.05 eV.


title:
A Gauge and Lorentz covariant Approximation for the Quark Propagator in
  an arbitrary Gluon Field

abstract:
  We decompose the quark propagator in the presence of an arbitrary gluon field
with respect to a set of Dirac matrices. The four-dimensional integrals which
arise in first order perturbation theory are rewritten as line-integrals along
certain field lines, together with a weighted integration over the various
field lines. It is then easy to transform the propagator into a form involving
path ordered exponentials. The resulting expression is non-perturbative and has
the correct behavior under Lorentz transformations, gauge transformations and
charge conjugation. Furthermore it coincides with the exact propagator in first
order of the coupling g. No expansion with respect to the inverse quark mass is
involved, the expression can even be used for vanishing mass. For large mass
the field lines concentrate near the straight line connection and simple
results can be obtained immediately.


title:
Investigation of the Role of Elastic Unitarity in High-Energy
  Scattering: Gribov's Theorem and the Froissart Bound

abstract:
  We re-examine V. Gribov's theorem of 1960 according to which the total
cross-section cannot approach a finite non-zero limit with, at the same time, a
diffraction peak having a finite slope. We are very close to proving by an
explicit counter-example that elastic unitarity in the elastic region is an
essential ingredient of the proof. By analogy, we raise the question of the
saturation of the Froissart-Martin bound, for which no examples incorporating
elastic unitarity exist at the present time.


title: CP Violation in Tau Slepton Pair Production at Muon Colliders

abstract:
  We discuss in detail signals for CP violation in the Higgs boson and
tau-slepton sectors through the production processes $\mu^+\mu^- \to
\tilde{\tau}_i^- \tilde{\tau}_j^+$, where $i,j=1,2$ label the two $\tau$
slepton mass eigenstates in the minimal supersymmetric standard model. We
assume that the soft breaking parameters of third generation sfermions contain
CP violating phases, which induce CP violation in the Higgs sector through
quantum corrections. We classify all the observables for probing CP violation
in the Higgs boson and $\tau$ slepton sectors. These observables depend on the
initial muon beam polarization, where we include transverse polarization
states. If the heavy Higgs bosons can decay into tau slepton pairs, a complete
determination of the CP properties of the neutral Higgs boson and
$\tau$--slepton systems is possible. The interference between the Higgs boson
and gauge boson contributions could also provide a powerful method for probing
CP violation, if transversely polarized muon beams are available. We show in
detail how to directly measure CP violation in the tau slepton system, under
the assumption that the neutral Higgs mixing angles are determined through the
on--shell production of the neutral Higgs bosons.


title: Thermal Effects in Low-Temperature QED

abstract:
  QED is studied at low temperature ($T\ll m$, where $m$ is the electron mass)
and zero chemical potential. By integrating out the electron field and the
nonzero bosonic Matsubara modes, we construct an effective three-dimensional
field theory that is valid at distances $R\gg1/T$. As applications, we
reproduce the ring-improved free energy and calculate the Debye mass to order
$e^5$.


title: Calculation of atmospheric neutrino flux

abstract:
  A calculation of the fluxes of primary particles arriving to the Earth's
vicinity as well as those produced in the interactions of the primaries with
the atmosphere is presented. The result of calculations is compared with the
experimental data obtained with the Alpha Magnetic Spectrometer (AMS). A good
agreement of calculated and measured fluxes of charged particles supports the
viability of the atmospheric neutrino flux calculation.


title: Relativistic quark models of baryons with instantaneous forces

abstract:
  This is the first of a series of three papers treating light baryon
resonances (up to 3 GeV) within a relativistically covariant quark model based
on the three-fermion Bethe-Salpeter equation with instantaneous two- and
three-body forces. In this paper we give a unified description of the
theoretical background and demonstrate how to solve the Bethe-Salpeter equation
by a reduction to the Salpeter equation. The specific new features of our
covariant Salpeter model with respect to the usual nonrelativistic quark model
are discussed in detail. The purely theoretical results obtained in this paper
will be applied numerically to explicit quark models for light baryons in two
subsequent papers.


title: Astroparticle Aspects of Supersymmetry

abstract:
  After recalling the motivations for expecting supersymmetry to appear at
energies below 1 TeV, the reasons why the lightest supersymmetric particle is
an ideal candidate for cold dark matter are reviewed from a historical
perspective. Recent calculations of the relic density including coannihilations
and rapid annihilations through direct-channel Higgs boson poles are presented.
The experimental constraints from LEP and elsewhere on supersymmetric dark
matter are reviewed, and the prospects for its indirect or direct detection are
mentioned. The potential implications of a Higgs boson weighing about 115 GeV
and the recent measurement of the anomalous magnetic moment of the muon are
summarized.


title:
The light baryon spectrum in a relativistic quark model with
  instanton-induced quark forces I. The non-strange baryon spectrum and
  ground-states

abstract:
  This is the second of a series of three papers treating light baryon
resonances up to 3 GeV within a relativistically covariant quark model based on
the three-fermion Bethe-Salpeter equation with instantaneous two- and
three-body forces. In this paper we apply the covariant Salpeter framework
(which we developed in the first paper) to specific quark model calculations.
Quark confinement is realized by a linearly rising three-body string potential
with appropriate spinorial structures in Dirac-space. To describe the hyperfine
structure of the baryon spectrum we adopt 't Hooft's residual interaction based
on QCD-instanton effects and demonstrate that the alternative
one-gluon-exchange is disfavored phenomenological grounds. Our fully
relativistic framework allows to investigate the effects of the full Dirac
structures of residual and confinement forces on the structure of the mass
spectrum. In the present paper we present a detailed analysis of the complete
non-strange baryon spectrum and show that several prominent features of the
nucleon spectrum such as e.g. the Roper resonance and approximate ''parity
doublets'' can be uniformly explained due to a specific interplay of
relativistic effects, the confinement potential and 't Hooft's force. The
results for the spectrum of strange baryons will be discussed in a subsequent
paper.


title:
The light baryon spectrum in a relativistic quark model with
  instanton-induced quark forces II. The strange baryon spectrum

abstract:
  This is the third of a series of papers treating light baryon resonances up
to 3 GeV within a relativistically covariant quark model based on the
Bethe-Salpeter equation with instantaneous two- and three-body forces. In this
last paper we extend our previous work on non-strange baryons to a prediction
of the complete strange baryon spectrum and a detailed comparison with
experiment. We apply our covariant Salpeter framework to specific quark models
as introduced in the two preceding papers. Quark confinement is realized by
linearly rising three-body string potentials with appropriate Dirac structures;
to describe the hyperfine structure of the baryon spectrum we adopt 't Hooft's
two-quark residual interaction based on QCD instanton effects. The
investigation of instanton-induced effects in the baryon mass spectrum plays a
central role in this work. We demonstrate that several prominent features of
the excited strange mass spectrum, e.g. the low positions of the strange
partners of the Roper resonance or the appearance of approximate ''parity
doublets'' in the Lambda-spectrum, find a natural, uniform explanation in our
relativistic quark model with instanton-induced forces.


title: The Transverse Energy as a Barometer of a Saturated Plasma

abstract:
  The evolution of the gluon plasma produced with saturation initial conditions
is calculated via Boltzmann transport theory for nuclear collisions at high
energy. The saturation scale increases with the nuclear size and the beam
energy, and thus we find that the perturbative rescattering rate decreases
relative to the initial longitudinal expansion rate of the plasma. The
effective longitudinal pressure remains significantly below the lattice QCD
pressure until the plasma cools to near the confinement scale. Therefore, the
transverse energy per unit of rapidity and its dependence on beam energy
provides a sensitive test of gluon saturation models: the fractional transverse
energy loss due to final state interactions is smaller and exhibits a weaker
energy dependence than if ideal (nondissipative) hydrodynamics applied
throughout the evolution.


title: Very light CP-odd scalar in the Two-Higgs-Doublet Model

abstract:
  We show that a general two-Higgs-doublet model (THDM) with a very light
CP-odd scalar (A) can be compatible with the rho parameter, Br(b --> s\gamma),
R_b, A_b, (g-2) of muon, Br(Upsilon --> A gamma), and the direct search via the
Yukawa process at LEP. For its mass around 0.2 GeV, the muon (g-2) and
Br(Upsilon --> A \gamma) data require tan(beta) to be about 1. Consequently, A
can behave like a fermiophobic CP-odd scalar and predominantly decay into a
photon pair ("gamma gamma"), which registers in detectors of high energy
collider experiments as a single photon signature when the momentum of A is
large. We compute the partial decay width of Z --> A A A and the production
rate of f \bar{f} --> Z A A --> Z +"gamma gamma", f^' {\bar f} --> W^{\pm} A A
--> W^\pm + "gamma gamma" and f \bar f --> H^+ H^- --> W^+ W^- A A --> W^+ W^-
+ "gamma gamma" at high energy colliders such as LEP, Tevatron, LHC, and future
Linear Colliders. Other production mechanisms of a light A, such as gg --> h
--> AA --> "gamma gamma", are also discussed.


title:
Erratum: Bremsstrahlung from an Equilibrating Quark-Gluon Plasma [Phys.
  Rev. C62, 014902 (2000)]

abstract:
  The implications of a numerical error in the photon production rate on the
direct photon spectrum of a chemically non-equilibrated quark-gluon plasma are
discussed.


title:
Higgs Boson Decays in the Minimal Supersymmetric Standard Model with
  Radiative Higgs Sector CP Violation

abstract:
  We re-evaluate the decays of the Higgs bosons in the minimal supersymmetric
standard model (MSSM) where the tree-level CP invariance of the Higgs potential
is explicitly broken by the loop effects of the third-generation squarks with
CP-violating soft-breaking Yukawa interactions. This study is based on the mass
matrix of the neutral Higgs bosons that is valid for arbitrary values of all
the relevant MSSM parameters. It extends the previous work considerably by
including neutral Higgs-boson decays into virtual gauge bosons and those into
top-squark pairs, by implementing squark-loop contributions to the two-gluon
decay channel, and by incorporating the decays of the charged Higgs boson. The
constraints from the electron electric dipole moment on the CP phases are also
discussed. We find that the branching fractions of both the neutral and charged
Higgs-boson decays and their total decay widths depend strongly on the CP
phases of the top (and bottom) squark sectors through the loop-induced neutral
Higgs boson mixing as well as the direct couplings of the neutral Higgs bosons
to top squark pairs.


title: Has the E791 experiment measured the pion wave function profile ?

abstract:
  The cross section of hard diffractive dissociation of the pion into two jets
is calculated. It is obtained that the distribution of longitudinal momenta for
jets is not simply proportional to the profile of the pion wave function, but
depends on it in a complicated way.
  In particular, it is shown that, under the conditions of the E791 experiment,
the momentum distribution of jets is similar in its shape for the asymptotic
and CZ wave functions, and even the ratio of the differential cross sections is
not far from unity.


title:
Summary Talk: First Workshop on Forward Physics and Luminosity
  Determination at the LHC

abstract:
  An attempt is made to summarize the discussion at the Workshop, except for
the panel discussion on the ability of the LHC detectors to accommodate forward
reactions. The Workshop focused on two main topics. The first topic was forward
physics at the LHC. Predictions were made for forward reactions, including
elastic scattering and soft diffractive processes, intopic was forward physics
at the LHC. Predictions were made for forward reactions, including elastic
scattering and soft diffractive processes, in terms of (multi) Pomeron
exchange, using knowledge gained at lower energies. The survival probability of
rapidity gaps accompanying hard subprocesses was studied. The nature of the
Pomeron, before and after QCD, was exposed, and some aspects of small x physics
at the LHC were considered. The second topic of the Workshop concerned the
accuracy of the luminosity measuring processes at the LHC. Attention
concentrated on three methods. The classic approach based on the optical
theorem, secondly, the observation of the pure QED process of lepton-pair
(l^+l^-) production by photon-photon fusion and, finally, the measurement of
inclusive W and Z production.


title:
Inflation with bulk fields in the Randall-Sundrum warped
  compactification?

abstract:
  Randall and Sundrum have proposed that we live on a brane embedded in
5-dimensional anti-deSitter space, as a solution to the hierarchy problem. We
examine the possibility of using a scalar field in the 5-D bulk as the
inflaton, and show that it gives results which are indistinguishable from an
inflaton which is restricted to our brane. This makes it difficult to get large
enough density perturbations in simple one-field inflationary models, since
mass scales on our brane are supposed to be limited by a cutoff of order 1 TeV.


title:
Can experimental tests of Bell inequalities performed with pseudoscalar
  mesons be definitive?

abstract:
  We discuss if experimental tests of Bell inequalities performed with
pseudoscalar mesons (K or B) can be definitive. Our conclusion is that this is
not the case, for the efficiency loophole cannot be eliminated.


title:
Constraining Models of New Physics in Light of Recent Experimental
  Results on $a_{\psi K_S}$

abstract:
  We study extensions of the Standard Model where the charged current weak
interactions are governed by the CKM matrix and where all tree-level decays are
dominated by their Standard Model contribution. We constrain both analytically
and numerically the ratio and the phase difference between the New Physics and
the Standard Model contributions to the mixing amplitude of the neutral $B$
system using the experimental results on $R_u$, $\Delta m_{d,s}$, $\epsilon_K$
and $a_{\psi K_S}$. We present new results concerning models with minimal
flavor violation and update the relevant parameter space. We also study the
left-right symmetric model with spontaneously broken CP, probing the viability
of this model in view of the recent results for $a_{\psi K_S}$ and other
observables.


title:
Analytic Approximations for Three Neutrino Oscillation Parameters and
  Probabilities in Matter

abstract:
  The corrections to neutrino mixing parameters in the presence of matter of
constant density are calculated systematically as series expansions in terms of
the mass hierarchy $\dm{21}/\dm{31}$. The parameter mapping obtained is then
used to find simple, but nevertheless accurate formulas for oscillation
probabibilities in matter including CP-effects. Expressions with one to one
correspondence to the vacuum case are derived, which are valid for neutrino
energies above the solar resonance energy. Two applications are given to show
that these results are a useful and powerful tool for analytical studies of
neutrino beams passing through the Earth mantle or core: First, the
``disentanglement problem'' of matter and CP-effects in the CP-asymmetry is
discussed and second, estimations of the statistical sensitivity to the
CP-terms of the oscillation probabilities in neutrino factory experiments are
presented.


title: Nuclear Scattering at Very High Energies

abstract:
  We discuss the current understanding of nuclear scattering at very high
energies. We point out several serious inconsistencies in nowadays models,
which provide big problems for any interpretation of data at high energy
nuclear collisions. We outline how to develop a fully self-consistent
formalism, which in addition uses all the knowledge available from studying
electron-positron annihilation and deep inelastic scattering, providing a solid
basis for further developments concerning secondary interactions.


title: Models for RHIC and LHC: New Developments

abstract:
  We outline inconsistencies in presently used models for high energy nuclear
scattering, which make their application quite unreliable. Many "successes" are
essentially based on an artificial freedom of parameters, which does not exist
when the models are constructed properly.
  The problem is the fact that any multiple scattering theory requires an
appropriate treatment of the energy sharing between the individual
interactions, which is technically very difficult to implement. Lacking a
satisfying solution to this problem, it has been simply ignored.
  We introduce a fully self-consistent formulation of the multiple-scattering
scheme. Inclusion of soft and hard components - very crucial at high energies -
appears in a "natural way", providing a smooth transition from soft to hard
physics.
  We can show that the effect of appropriately considering energy conservation
has a big influence on the results, and MUST therefore be included in any
serious calculation.


title: Space-time evolution of the \lap model: classical and quantum aspects

abstract:
  A time dependent variational approach is used to derive the equations of
motion for the \lambda \phi^4 model. The simultaneous evolution of the quantum
fluctuations and of the classical part of the field is considered in a lattice
of 1+1 dimensions. Different initial conditions corresponding to non
equilibrium situations are considered and evolved in time. Such high energy
localized configurations expand in the lattice by ``bumps'' which may change
with time. The quantum fluctuations make the peaks be smoother and the
expansion faster.


title: Renormalizability and searching for Z' gauge bosons

abstract:
  New observables for searching for Z' virtual states in processes
e^+e^-\to\bar{f}f are proposed. They are based on the relations following due
to renormalizability of an underlying theory between the parameters of the
low-energy effective Lagrangian. Two types of the Z' interactions are
considered. The observables allow to pick up uniquely the signals of both Z'
bosons. The search for the Z' at future linear colliders and the treating of
the LEP data are discussed.


title: Review of the PQCD approach to exclusive B decays

abstract:
  I review important aspects of the perturbative QCD approach to exclusive $B$
meson decays, concentrating on factorization theorem, gauge invariance,
end-point singularities, $k_T$ and threshold resummations, power counting,
penguin enhancement, and CP asymmetries.


title: Constructing the fermion-boson vertex in QED3

abstract:
  We derive perturbative constraints on the transverse part of the
fermion-boson vertex in massive QED3 through its one loop evaluation in an
arbitrary covariant gauge. Written in a particular form, these constraints
naturally lead us to the first non-perturbative construction of the vertex,
which is in complete agreement with its one loop expansion in all momentum
regimes. Without affecting its one-loop perturbative properties, we also
construct an effective vertex in such a way that the unknown functions defining
it have no dependence on the angle between the incoming and outgoing fermion
momenta. Such a vertex should be useful for the numerical study of dynamical
chiral symmetry breaking, leading to more reliable results.


title: The rare decay $t \to c \gamma$ in the General 2HDM type III

abstract:
  We consider the branching ratio for the process $t \to c \gamma$ in the
context of the General Two Higgs Doublet Model type III. We find that taking
into account reasonable values for the parameter $\tan \beta$ is possible to
get values of this branching ratio up to orders of magnitude lying in the range
of sensitivity of near future top quark experiments. For values of $B(t \to c
\gamma) \sim 1-9 \times 10^{-5}$, values between 8-15 for $\tan \beta$ are
allowed.


title: Z boson pair production at LHC in a stabilized Randall-Sundrum scenario

abstract:
  We study the Z boson pair production at LHC in the Randall-Sundrum scenario
with the Goldberger-Wise stabilization mechanism. It is shown that
comprehensive account of the Kaluza-Klein graviton and radion effects is
crucial to probe the model: The KK graviton effects enhance the cross section
of $g g \to Z Z$ on the whole so that the resonance peak of the radion becomes
easy to detect, whereas the RS effects on the $q\bar{q} \to Z Z$ process are
rather insignificant. The $p_T$ and invariant-mass distributions are presented
to study the dependence of the RS model parameters. The production of
longitudinally polarized Z bosons, to which the SM contributions are
suppressed, is mainly due to KK gravitons and the radion, providing one of the
most robust methods to signal the RS effects. The $1 \sigma$ sensitivity bounds
on $(\Lambda_\pi, m_\phi)$ with $k/M_{\rm Pl} =0.1$ are also obtained such that
the effective weak scale $\Lambda_\pi$ of order 5 TeV can be experimentally
probed.


title:
Prototype Graphs for radiative Corrections to Polarized Chargino or
  Neutralino Production in Electron-Positron Annihilation

abstract:
  We present the contributions from all types of one-loop corrections to the
scattering amplitude for the pair production of polarized charginos or
neutralinos from polarized electron-positron annihilation. The contributions
are classified in terms of ``prototypes'' distinguished by the number of
particles inside the loops and their spins. The results are quoted in terms of
the Veltman-Passarino functions in terms of general couplings and internal
masses. The results can therefore be applied to any supersymmetric extension of
the Standard Model or indeed to any polarized fermion pair production process
in electron-positron annihilation.


title: Theoretical Aspects of $b \to s \gamma$ Transitions

abstract:
  In this talk some of the theoretical aspects of $b \to s \gamma$ transitions
are discussed. The focus is on inclusive decays, since these can be computed
more reliably. Topics covered are (1) perturbative QCD corrections, (2)
non-perturbative contributions and (3) effects of ``new physics'' in these
decays.


title: Phase transition dynamics in the hot Abelian Higgs model

abstract:
  We present a detailed numerical study of the equilibrium and non-equilibrium
dynamics of the phase transition in the finite-temperature Abelian Higgs model.
Our simulations use classical equations of motion both with and without
hard-thermal-loop corrections, which take into account the leading quantum
effects. From the equilibrium real-time correlators, we determine the Landau
damping rate, the plasmon frequency and the plasmon damping rate. We also find
that, close to the phase transition, the static magnetic field correlator shows
power-law magnetic screening at long distances. The information about the
damping rates allows us to derive a quantitative prediction for the number
density of topological defects formed in a phase transition. We test this
prediction in a non-equilibrium simulation and show that the relevant time
scale for defect formation is given by the Landau damping rate.


title: Neutrinos Confronting Large Extra Dimensions

abstract:
  We study neutrino physics in a model with one large extra dimension. We
assume the existence of two four-dimensional branes in the five-dimensional
space-time, one for the ordinary particles and the other one for mirror
particles, and we investigate neutrino masses and mixings in this scheme.
Comparison of experimental neutrino data with the predictions of the model
leads to various restrictions on the parameters of the model. For instance, the
size of the extra dimension, R, turns out to be bounded from below.
Cosmological considerations seem to favor a large R. The usual mixing schemes
proposed as solutions to the solar and atmospheric neutrino anomalies are
compatible with our model.


title:
Heavy quark induced effective action for gauge fields in the SU(N_c) x
  U(1) model and the low-energy structure of heavy quark current correlators

abstract:
  We calculate the low-energy limit of heavy quark current correlators within
an expansion in the inverse heavy quark mass. The induced low-energy currents
built from the gluon fields corresponding to the initial heavy quark currents
are obtained from an effective action for gauge fields in the one-loop
approximation at the leading order of the 1/m expansion. Explicit formulae for
the low-energy spectra of electromagnetic and tensor heavy quark current
correlators are given. Consequences of the appearance of a nonvanishing
spectral density below the two-particle threshold for high precision
phenomenology of heavy quarks are discussed quantitatively.


title: Lattice Results on QCD Thermodynamics

abstract:
  We review recent results on QCD at finite temperature. Main emphasis is put
on a discussion of observables which are of immediate interest to experimental
searches for the Quark Gluon Plasma, i.e. the phase transition temperature, the
equation of state in 2 and 3-flavour QCD, the heavy quark free energy and
thermal effects on hadron masses.


title: Bloch-Nordsieck Violation in Spontaneously Broken Abelian Theories

abstract:
  We point out that, in a spontaneously broken U(1) gauge theory, inclusive
processes, whose primary particles are mass eigenstates that do not coincide
with the gauge eigenstates, are not free of infrared logarithms. The charge
mixing allowed by symmetry breaking and the ensuing Bloch-Nordsieck violation
are here analyzed in a few relevant cases and in particular for processes
initiated by longitudinal gauge bosons. Of particular interest is the example
of weak hypercharge in the Standard Model where, in addition, left-right mixing
effects arise in transversely polarized fermion beams.


title:
Enhanced Electroweak Corrections to Inclusive Boson Fusion Processes at
  the TeV Scale

abstract:
  Electroweak radiative corrections with double-log enhancements occur in
inclusive observables at the TeV scale because of a lack of compensation of
virtual corrections with real emission due to the nonabelian (weak isospin)
charges of the accelerator beams. Here we evaluate such Bloch-Nordsieck
violating corrections in the case of initial longitudinal bosons, which is
experimentally provided by boson fusion processes, and is related to the
Goldstone-Higgs sector. All four states of this sector are involved in the
group structure of the corrections, and cause in particular a novel double log
effect due to hypercharge mixing in the longitudinal states. We study both the
light- and the heavy-Higgs cases, and we analyze the symmetry breaking pattern
of the corrections. The latter turn out to be pretty large, in the 5-10 %
range, and show an interesting Higgs mass dependence, even for processes
without Higgs boson in the final state.


title: g-2 in composite models of leptons

abstract:
  Based on the bound state description of the muon and general relativistic
covariant quantum field theory, we illustrate with a simple composite model
that the observed deviation of (g-2)_\mu can be a demonstration of the
substructure of the muon and give the constraints on the radius of the muon in
different cases of light constituents and heavy constituents.


title: Reviving the energy independent suppression of the solar neutrino flux

abstract:
  We explore the possibility of an energy independent suppression of the solar
neutrino flux in the context of the recent SuperKamiokande data. From a global
analysis of the rate and spectrum data, this scenario is allowed at only 14%
probability with the observed Cl rate. If we allow for a 20% upward
renormalisation of the Cl rate along with a downward renormalisation of the $B$
neutrino flux then the fit improves considerably to a probability of $\sim
50%$. We compare the quality of these fits with those of the MSW solutions.
These renormalisations are also found to improve the quality of the fits with
MSW solutions and enlarge the allowed region of their validity in the parameter
space substantially. Over much of this enlarged region the matter effects on
the suppression of the solar neutrino flux are found to be very weak, so that
the solutions become practically energy independent.


title: Determination of the CP Phase $\gamma$ with Possibility of New Physics

abstract:
  We propose a new method to extract the CP violating weak phase $\gamma$ in
the CKM paradigm of the Standard Model, using $B^- \to D^0 \pi^- \to f \pi^-$
and $B^- \to \bar D^0 \pi^- \to f \pi^-$ decays, where $f$ are final states
such as $K^+ \pi^-$, $K^+ \rho^-$, $K \pi\pi$, {\it etc.} We also study the
experimental feasibility of our new method. With possibility of new phases in
the CKM matrix, we re-examine some of the previously proposed methods to
determine $\gamma$, and find that it would be in principle possible to identify
$\gamma$ and a new phase angle $\theta$ separately.


title: EDM Constraints in Supersymmetric Theories

abstract:
  We systematically analyze constraints on supersymmetric theories imposed by
the experimental bounds on the electron, neutron, and mercury electric dipole
moments. We critically reappraise the known mechanisms to suppress the EDMs and
conclude that only the scenarios with approximate CP-symmetry or
flavour-off-diagonal CP violation remain attractive after the addition of the
mercury EDM constraint.


title: Measuring sin 2\beta in Bs(t) -> phi K_s

abstract:
  We show that, unlike other pure b -> d penguin processes, the decay Bs(t) ->
phi K_s is dominated by a single amplitude, that of the internal t-quark. The
contributions of the u- and c-quark operators each vanish due to a cancellation
between the (V-A) \otimes (V-A) and (V-A) \otimes (V+A) matrix elements. Thus,
the indirect CP asymmetry in this decay probes sin 2\beta. Although this
cancellation is complete only for certain values of the s- and b-quark masses,
the theoretical uncertainty on sin 2\beta is still less than 10% over most
(~80%) of the parameter space. By measuring the direct CP asymmetry, one can
get a better idea of the probable error on sin 2\beta.


title: Atmospheric neutrino flux supported by recent muon experiments

abstract:
  We present a new one-dimensional calculation of low and intermediate energy
atmospheric muon and neutrino fluxes, using up-to-date data on primary cosmic
rays and hadronic interactions. We study several sources of uncertainties
relevant to our calculations. A comparison with the muon fluxes and charge
ratios measured in several modern balloon-borne experiments suggests that the
atmospheric neutrino flux is essentially lower than one used for the standard
analyses of the sub-GeV and multi-GeV neutrino induced events in underground
detectors.


title:
Nonlinear and spin effects in two-photon annihilation of a fermion pair
  in an intensive laser wave

abstract:
  The pattern of calculation of amplitudes of a series of processes in the
field of an intensive laser wave, in which two fermions $(p; p')$ and two real
photons $(k_1; k_2)$ participate, is considered. In relation to one-photon
processes, these processes are of the second order on $\alpha$, if the wave
intensity $\xi \ll 1$ (i.e., actually absorption from the wave only one
quantum). Otherwise, they are competing and essentially nonlinear. One-photon
processes have a number of the important physical applications. For example,
${\gamma}e$ and ${\gamma}{\gamma}$ colliders work on their basis.
  In DSB the calculation is conducted at the level of reaction amplitudes. It
essentially simplifies both the calculation and the form of obtained results;
those combinations of amplitudes which describe the spin effects are easy to
calculate. And these effects are especially essential in nonlinear processes.
The calculations are conducted in covariant form. Besides compactness, this
provides independence of the frames of reference and energy modes. The masses
of fermions are taken into account precisely and are not assumed equal each
other (heavy leptons, modes of various decays). The pattern of calculation is
given in the channel indicated in the title. The amplitudes of this channel are
also applicable for calculating of induced decay of orthopositronium into two
photons. And in this approach there is no necessity to assume the relative
momentum equal to zero.


title: General Flavor Blind MSSM and CP Violation

abstract:
  We study the implications on flavor changing neutral current and CP violating
processes in the context of supersymmetric theories without a new flavor
structure (flavor blind supersymmetry). The low energy parameters are
determined by the running of the soft breaking terms from the grand unified
scale with SUSY phases consistent with the EDM constraints. We find that the CP
asymmetry in b --> s gamma can reach large values potentially measurable at B
factories, especially in the low BR(b --> s gamma) region. We perform a fit of
the unitarity triangle including all the relevant observables. In this case, no
sizeable deviations from the SM expectations are found. Finally we analyze the
SUSY contributions to the anomalous magnetic moment of the muon pointing out
its impact on the b --> s gamma CP asymmetry and on the SUSY spectrum including
chargino and stop masses.


title: Quantum algebras in phenomenological description of particle properties

abstract:
  Quantum and q-deformed algebras find their application not only in
mathematical physics and field theoretical context, but also in phenomenology
of particle properties. We describe (i) the use of quantum algebras U_q(su_n)
corresponding to Lie algebras of the groups SU(n), taken for flavor symmetries
of hadrons, in deriving new high-accuracy hadron mass sum rules, and (ii) the
use of (multimode) q-oscillator algebras along with q-Bose gas picture in
modelling the properties of the intercept \lambda of two-pion (two-kaon)
correlations in heavy-ion collisions, as \lambda shows sizable observed
deviation from the expected Bose-Einstein type behavior. The deformation
parameter q is in case (i) argued and in case (ii) conjectured to be connected
with the Cabibbo angle \theta_C.


title: Sigma/Glueball Decay of D$^+$ and D$^+_s$

abstract:
  Recently the D$^+$ charm meson was observed to have a clear branching ratio
into the low energy $\pi-\pi$ sigma resonance, while this channel was not
detected in the D$_s^+$ decay. It is shown that this is consistent with the
standard treatment of exclusive charm meson decays and a proposed
glueball/sigma picture.


title: Thermalization in Yang-Mills Classical Mechanics

abstract:
  We use quartic oscillators system with two degrees of freedom to model
Yang-Mills classical mechanics. This simple model explains qualitatively many
features reported in lattice calculation of $(3+1)$ - dimensional classical
Yang-Mills system. The largest Lyapunov exponent ($\lambda$) and the
thermalization time were numerically evaluated. We also show, in our model,
that $\lambda$ scales with 4th root of energy density. Here thermalization is
due to relaxation phenomena associated with the color degrees of freedom. From
the physical picture of thermalization, we speculate that the system with
coherent fields (flux tubes) formed in relativistic heavy ion collisions can
relax by chaos and the estimated thermalization time can be smaller than $1
fm/c$.


title:
Comparison of 3-Dimensional and 1-Dimensional Schemes in the calculation
  of Atmospheric Neutrinos

abstract:
  A 3-dimensional calculation of atmospheric neutrinos flux is presented, and
the results are compared with those of a 1-dimensional one. In this study,
interaction and propagation of particles is treated in a 3-dimensional way
including the curvature of charged particles due to the geomagnetic field,
which is assumed to be a dipole field. The purpose of this paper is limited to
the comparison of calculation schemes. The updated flux value with new
interaction model and primary flux model will be reported in a separate paper.
  Except for nearly horizontal directions, the flux is very similar to the
result of 1 dimensional calculations. However, for near-horizontal directions
an enhancement of the neutrino flux is seen even at energies as high as 1 GeV.
The production height of neutrinos is lower than the prediction by
1-dimensional calculation for near-horizontal directions, and is a little
higher for near-vertical directions. However, the difference is not evident
except for near-horizontal directions.


title: Inclusive dijet photoproduction and the resolved photon at THERA

abstract:
  A future $ep$ facility, THERA, where electrons of 250 GeV and protons of 920
GeV are collided could provide valuable information on the structure of the
photon. With an increase in the centre-of-mass energy of a factor of 3 and an
extension of the minimum photon energy fraction carried by the interacting
parton of a factor of 10 compared to HERA, a new kinematic regime in the study
of the photon will be opened. Inclusive dijet production has been studied and
the potential gains the new collider would bring are discussed. The differences
between current parametrisations of the photon structure in this new kinematic
region are shown to be up to 50%. Comparisons of THERA's capabilities are made
with what HERA can currently produce and how it complements $e^+e^-$ colliders
addressed.


title: Heavy quark photoproduction at THERA

abstract:
  Measurements of heavy quark production at a possible future $ep$ facility,
THERA, would provide valuable information on the structure of the photon. QCD
cross-section predictions are made at LO for both charm and beauty production
and their sensitivity to current parametrisations of the photon parton
densities is investigated.


title:
CP Asymmetries in $b \to (s/d)$ Transitions as a Test of CKM CP
  Violation

abstract:
  We point out that a simple test of the mechanism of CP violation can be
performed by a measurement of the CP asymmetries in exclusive and inclusive
radiative rare decays. We show that the rate asymmetries $\Delta \Gamma =
\Gamma(B^- \to f \gamma) - \Gamma(B^+ \to \bar{f} \gamma)$} for certain final
states $f$ can be predicted in a theoretically clean way. Some implications for
$b \to s \ell^+ \ell^-$ decays are discussed.


title: Energy Loss of Hard Partons in Nuclear Matter

abstract:
  We report on recent calculations of the medium-induced gluon radiation off
hard partons. The employed path-integral formalism reduces in limiting cases to
the main ``jet quenching'' results of the existing literature. Moreover, it
describes destructive interference effects between medium-independent and
medium-induced radiation amplitudes. These affect the angular distribution and
$L$-dependence of the medium-induced gluon bremsstrahlung spectrum
significantly.


title: Electroweak D-Waves

abstract:
  We consider phenomenological implications of a model recently proposed for
the electroweak interactions based on a SU(2)_L confining theory. We
concentrate on the production of excited states of the electroweak bosons at
future colliders and we consider their contribution to the reaction W^+ + W^-
\to W^+ + W^-. We expect large deviations from the standard model in the TeV
region.


title: Hierarchies of quark masses and the mixing matrix in the standard theory

abstract:
  We study the general dependence of mixing angles on heavy fermion masses when
mass hierarchies exist among the fermions. For two generations and small
Cabibbo angle, this angle is directly shown to scale like $\mu_1/m_s \pm
\mu_2/m_c$, where $|\mu_1| \ll m_s, |\mu_2| \ll m_c$ are independent mass
scales. For $n=3$ generations, we extend to the Yukawa matrices of $u$- and
$d$-type quarks the property that the $2\times 2$ upper-left sub-matrix of the
Cabibbo-Kobayashi-Maskawa matrix $K$ is a good approximation to the Cabibbo
matrix $C$. Then, without any additional Ansatz concerning the existence of
mass hierarchies or the smallness of the mixing angles, the moduli of its
entries $K_{13},K_{23},K_{31},K_{32}$ are shown to scale like
$[\beta_{13},\beta_{23},\beta_{31},\beta_{32}] \sqrt{{m_c}/{m_t}} \pm
[\delta_{13},\delta_{23},\delta_{31},\delta_{32}] \sqrt{{m_s}/{m_b}}$, where
the $\beta$'s and the $\delta$'s are coefficients smaller than 10. This method,
when used for two generations, gives a dependence on $m_s$ and $m_c$ ``weaker''
than the one obtained first, but which matches a well known behaviour for the
Cabibbo angle: $\theta_c \approx \sqrt{\epsilon_d (m_d/m_s)} -
\sqrt{\epsilon_u(m_u/m_c)}$, with $\epsilon_d,\epsilon_u \leq 1$. The
asymptotic behaviour in the case of three generations can also be strengthened
into a $1/m_{b,t}$ behaviour by incorporating our knowledge about the
hierarchies of quark masses and the smallness of the mixing angles.


title:
The role of universal and non universal Sudakov logarithms in four
  fermion processes at TeV energies: the one-loop approximation revisited

abstract:
  We consider the separate effects on four fermion processes, in the TeV energy
range, produced at one loop by Sudakov logarithms of universal and not
universal kind, working in the 't Hooft xi=1 gauge. Summing the various vertex
and box contributions allows to isolate two quite different terms.The first one
is a combination of vertex and box quadratic and linear logarithms that are
partially universal and partially not universal and independent of the
scattering angle theta. The second one is theta-dependent, not universal,
linearly logarithmic and only produced by weak boxes. We show that for several
observables, measurable at future linear e+e- colliders (LC, CLIC), the role of
the latter term is dominant and we discuss the implications of this fact for
what concerns the reliability of a one-loop approximation.


title: Characteristic predictions of topological soliton models

abstract:
  The characteristic predictions of chiral soliton models - the Skyrme model
and its extentions - are discussed. The chiral soliton models prediction of
dibaryon states with masses below NN-pion threshold is in qualitative agreement
with recent evidence for the existence of narrow dibaryons in reactions of
inelastic proton scattering on deuterons and two-photon radiation in
proton-proton scattering. The connection between isovector magnetic momentum
operator and mixed tensor of inertia of multiskyrmion, as well as between
isoscalar magnetic momentum and orbital tensor of inertia valid for skyrmions
with any B-numbers allows to estimate the electromagnetic decay widths of some
states of interest. Another kind of predictions are multibaryons with
nontrivial flavour - strangeness, charm or bottom, which can be found, in
particular, in high energy heavy ions collisions. It is shown that the large B
multiskyrmions given by rational map ansaetze can be described reasonably well
within the domain wall approximation, or as spherical bubble with energy and
baryon number density concentrated at its boundary. A simple formula is
obtained describing the masses of known RM multiskyrmions with good accuracy.


title: Baryon Number Transfer in Hadronic Interaction

abstract:
  The process of baryon number transfer due to string junction propagation in
rapidity is considered. It has a significant effect in the net baryon
production in $pp$ collisions at mid-rapidities and an even larger effect in
the forward hemisphere in the cases of $\pi p$ and $\gamma p$ interactions. The
results of numerical calculations in the framework of the Quark-Gluon String
model are in reasonable agreement with the data.


title: Physics Signatures at CLIC

abstract:
  A set of signatures for physics processes of potential interests for the CLIC
programme at 1 - 5 TeV are discussed. These signatures, that may correspond to
the manifestation of different scenarios of new physics as well to Standard
Model precision tests, are proposed as benchmarks for the optimisation of the
CLIC accelerator parameters and for a first definition of the required detector
response.