title: Instanton in the nonperturbative QCD vacuum

abstract:
  The influence of nonperturbative fields on instantons in quantum
chromodynamics is studied. Effective action for instanton is derived in bilocal
approximation and it is demonstrated that stochastic background gluon fields
are responsible for IR stabilization of instantons. It is shown that instanton
size in QCD is of order of 0.25 fm. Comparison of obtained instanton size
distribution with lattice data is made.


title:
The Small-x Behaviour of the Singlet Polarized Structure Function g_2 in
  the Double Logarithmic Approximation

abstract:
  The small-x behavior of the singlet contributions to the polarized structure
function g_2(x,Q^2) is calculated in the double-logarithmic approximation of
perturbative QCD. The dominant contribution is due to the gluons which, in
contrast to the unpolarized case, mix with the fermions also in the small-x
domain. We find a power-like growth in 1/x in the odd-signature parts of the
amplitude with the same power as in the singlet function g_1(x,Q^2) at x<< 1.


title:
Determination of the muon Yukawa coupling at high energy e+e- linear
  colliders

abstract:
  The perspectives for the observation of the rare decay H -> mumu decay and
the determination of the muon Yukawa coupling at a TeV-class and at a multi-TeV
e+e- linear colliders are discussed. The signal for the decay can be obtained
at 0.8 TeV and a first estimate of the coupling derived. A linear collider
operating at 3 TeV, with high luminosity, is able to improve the accuracy on
this couplings to 4% to 11% for 120 GeV < M_H < 150 GeV.


title: Chiral loops and VMD in the V->PPgamma decays

abstract:
  We evaluate radiative decays of $\rho$ and $\omega$ going to two neutral
mesons, $\pi^{0} \pi^{0}$ and $\pi^{0} \eta$. We use the sequential vector
decay mechanisms in addition to chiral loops and $\rho$-$\omega$ mixing. The
chiral loops are obtained using elements of $U\chi PT$ successfully applied in
the study of meson-meson interactions up to 1.2 GeV. The chiral loops are found
very important in the case of the $\rho \to \pi^{0} \pi^{0} \gamma$ decay and
small in the other cases. A good agreement with present measurements of $\rho
\to \pi^{0} \pi^{0} \gamma$ and $\omega \to \pi^{0} \pi^{0}\gamma$ is obtained
and predictions are made for the other decays where the rates obtained are
rather small.


title: Light scalar meson spectrum

abstract:
  We discuss the classification of the light scalar mesons with mass below 2
GeV into q qbar nonets and glueballs. The information on production and decay
of these states, in particular recent information on f_0(980), f_0(400-1200)
(or sigma(600)) and f_0(1500) is considered. Although the data are not yet very
precise the recent information is in favour of the previously developed scheme
which includes f_0(980), a_0(980), K_0^*(1430), f_0(1500) into the lightest
scalar nonet. The glueball in this approach appears as broad object around 1
GeV. Alternative schemes find the glueball at somewhat higher mass or suggest
his mixing with q qbar states spread over a similar mass range. We do not see
sufficient evidence yet for a light scalar nonet below 1 GeV around a
sigma(600) resonance.


title:
Radiatively-induced Magnetic moment in four-dimensional anisotropic QED
  in an external magnetic field

abstract:
  We discuss one-loop radiatively-induced magnetic moment in four-dimensional
quantum electrodynamics (QED) with anisotropic coupling, and examine various
cases which may be of interest in effective gauge theories of antiferromagnets,
whose planar limit coresponds to highly anisotropic QED couplings. We find a
different scaling with the magnetic field intensity in case there are extra
statistical gauge interactions in the model with spontaneous symmetry breaking.
Such a case is encountered in the CP-1 sigma-model sector of effective
spin-charge separated gauge theories of antiferromagnetic systems. Our work
provides therefore additional ways of possible experimental probing of the
gauge nature of such systems.


title: Dimming Supernovae without Cosmic Acceleration

abstract:
  We present a simple model where photons propagating in extra-galactic
magnetic fields can oscillate into very light axions. The oscillations may
convert some of the photons departing a distant supernova into axions, making
the supernova appear dimmer and hence more distant than it really is. Averaging
over different configurations of the magnetic field we find that the dimming
saturates at about 1/3 of the light from the supernovae at very large
redshifts. This results in a luminosity-distance vs. redshift curve almost
indistinguishable from that produced by the accelerating Universe, if the axion
mass and coupling scale are m ~ 10^-16 eV, M ~ 4 10^11 GeV. This phenomenon may
be an alternative to the accelerating Universe for explaining supernova
observations.


title:
Searching for Higgs Bosons in Association with Top Quark Pairs in the H
  -> bb Decay Mode

abstract:
  Search for the Higgs Boson is one of the prime goals of the LHC. Higgs bosons
lighter than 130 GeV decay mainly to a b-quark pair. While the detection of a
directly produced Higgs boson in the bb channel is impossible because of the
huge QCD background, the channel ttH -> lnqqbbbb is very promising in the
Standard Model and the MSSM.
  We discuss an event reconstruction and selection method based on likelihood
functions. The CMS detector response is performed with parametrisations
obtained from detailed simulations. Various physics and detector performance
scenarios are investigated and the results are presented. It turns out that
excellent b-tagging performance and good mass resolution are essential for this
channel.


title: Probing New Physics With b Decays

abstract:
  I discuss how b decays can be used to unravel new physics beyond the Standard
Model. Decays second order in the weak interaction involving loops and CP
violation are emphasized. This information is complementary to that obtainable
with higher energy machines.


title:
Theoretical and Experimental Status of the Indirect Higgs Boson Mass
  Determination in the Standard Model

abstract:
  The impact of theoretical and experimental uncertainties on the indirect
determination of the Higgs boson mass, MH, in the Standard Model (SM) is
discussed. Special emphasis is put on the electroweak precision observables MW
(the W boson mass) and sin^2(theta_eff) (the effective leptonic mixing angle).
The current uncertainties of the theoretical predictions for MW and
sin^2(theta_eff) due to missing higher order corrections are conservatively
estimated to delta MW \approx 7 MeV and delta sin^2(theta_eff) \approx 7 x
10^-5 . Expectations and necessary theoretical improvements for future
colliders are explored. Results for the indirect MH determination are presented
based on the present experimental and theoretical precisions as well as on
improvements corresponding to the prospective situation at future colliders.
The treatment of the different future colliders is done in a uniform way in
order to allow for a direct comparison of the accuracies that can be reached.
Taking all experimental, theoretical, and parametric uncertainties into
account, a current upper bound on MH of \sim 200 GeV is obtained. Furthermore
we find in a conservative approach that a Linear Collider with GigaZ
capabilities can achieve a relative precision of about 8% (or better) in the
indirect determination of MH.


title: The onset of classical QCD dynamics in relativistic heavy ion collisions

abstract:
  The experimental results on hadron production obtained recently at RHIC offer
a new prospective on the energy dependence of the nuclear collision dynamics.
In particular, it is possible that parton saturation -- the phenomenon likely
providing initial conditions for the multi--particle production at RHIC
energies -- may have started to set in central heavy ion collisions already
around the highest SPS energy. We examine this scenario, and make predictions
based on high density QCD for the forthcoming 22 GeV run at RHIC.


title: Signatures of the neutral top-pion in $e\gamma$ collisions

abstract:
  We calculate the contributions of the neutral top-pion $\pi_{t}^0$ to the
process $e^-\gamma\to e^-\bar{t}c$ in the framework of topcolor-assisted
technicolor(TC2) models and discuss the possible of detecting $\pi_t^0$ at the
high energy linear $e^+e^-$ collider(LC). Our results show that $\pi_t^0$ can
give significant contributions to this process. With reasonable values of the
parameters in TC2 models, the cross section $\sigma$ can reach 0.19 fb which
may be detected at the $e\gamma$ collisions based on the future LC experiments.


title:
Probing neutrino oscillations jointly in long and very long baseline
  experiments

abstract:
  We examine the prospects of making a joint analysis of neutrino oscillation
at two baselines with neutrino superbeams. Assuming narrow band superbeams and
a 100 kt water Cerenkov calorimeter, we calculate the event rates and
sensitivities to the matter effect, the signs of the neutrino mass differences,
the CP phase and the mixing angle \theta_{13}. Taking into account all possible
experimental errors under general consideration, we explored the optimum cases
of narrow band beam to measure the matter effect and the CP violation effect at
all baselines up to 3000 km. We then focus on two specific baselines, a long
baseline of 300 km and a very long baseline of 2100 km, and analyze their joint
capabilities. We found that the joint analysis can offer extra leverage to
resolve some of the ambiguities that are associated with the measurement at a
single baseline.


title: t -> c H^0 decay in the general two Higgs doublet model

abstract:
  We study the flavor changing t -> c H^0 decay in the framework of the general
two Higgs doublet model, so called model III. Here, we take the Yukawa
couplings complex and switch on the CP violating effects. We predict the
branching ratio six orders larger compared to the one calculated in the SM,
namely BR ~ 10^{-7}, and observe a measurable CP asymmetry, at the order of
10^{-2}.


title:
Bimaximal Mixings from the Texture of the Right-handed Majorana Neutrino
  Mass Matrix

abstract:
  We study the origin of neutrino masses and mixing angles which can accomodate
the LMA MSW solutions of the solar neutrino anomaly as well as the solution of
the atmospheric neutrino problem, within the framework of the see-saw
mechanism. We employ the diagonal form of the Dirac neutrino mass matrices with
the physical masses as diagonal elements in the hierarchical order. Such choice
has been motivated from the fact that the known CKM angles for the quark
sector, are relatively small. We consider both possibilities where the Dirac
neutrino mass matrix is either the charged lepton or the up-quark mass matrix
within the framework of SO(10) GUT with or without supersymmetry. The non-zero
texture of the right-handed Majorana neutrino mass matrix $M_{R}$ is used for
the generation of the desired bimaximal mixings in a model independent way.
Both hierarchical and inverted hierarchical models of the left-handed Majorana
neutrino mass matrices are generated and then discussed with examples.


title: CPT and Lorentz Tests with Clocks in Space

abstract:
  Space-based clock-comparison experiments can provide Planck-scale sensitivity
to many parameters for Lorentz and CPT violation that are difficult to measure
on Earth. The principal advantages are a reduced timescale for data collection,
reduced suppression for certain effects, and access to certain parameters not
possible with Earth-based experiments.


title: On the equivalence of regularization schemes

abstract:
  We illustrated via the sunset diagram that dimensional regularization
'deforms' the nonlocal contents of multi-loop diagrams with its equivalence to
cut-off regularization scheme recovered only after sub-divergence were
subtracted. Then we employed a differential equation approach for calculating
loop diagrams to verify that dimensional regularization deformed the 'low
energy' contents before subtraction. The virtues of the differential equation
approach were argued especially in non-perturbative perspective.


title: Parameter free calculation of hadronic masses from instantons

abstract:
  We propose a non-perturbative calculation scheme which is based on the
semi-classical approximation of QCD and can be used to evaluate quantities of
interest in hadronic physics. As a first application, we evaluate the mass of
the pion and of the nucleon. Such masses are related to a particular
combination of Green functions which, in some limit, is dominated by the
contribution of \emph{very small-sized} instantons. The size distribution of
these pseudo-particles is determined by the 't Hooft tunneling amplitude
formula and therefore our calculation is free from any model parameters. We
prove that instanton forces generate a light pion and a nucleon with realistic
mass ($M_n \sim 970 MeV$). In connection with sum-rules approaches, we discuss
the overlap of instantons with pion and nucleon resonances.


title: Probing the Planck Scale in Low-Energy Atomic Physics

abstract:
  Experiments in atomic physics have exceptional sensitivity to small shifts in
energy in an atom, ion, or bound particle. They are particularly well suited to
search for unique low-energy signatures of new physics, including effects that
could originate from the Planck scale. A number of recent experiments have used
CPT and Lorentz violation as a candidate signal of new physics originating from
the Planck scale. A discussion of these experiments and their theoretical
implications is presented.


title:
Lepton Electric Dipole Moments in Non-Degenerate Supersymmetric Seesaw
  Models

abstract:
  In the context of supersymmetric seesaw models of neutrino masses with
non-degenerate heavy neutrinos, we show that Dirac Yukawa interactions N^c_i
(Y_nu)_{ij} L_j H_2 induce large threshold corrections to the slepton soft
masses via renormalization. While still yielding rates for
lepton-flavour-violating processes below the experimental bounds, these
contributions may increase the muon and electron electric dipole moments d_mu
and d_e by several orders of magnitude. In the leading logarithmic
approximation, this is due to three additional physical phases in Y_nu, one of
which also contributes to leptogenesis. The naive relation d_mu/d_e\approx
-m_mu/m_e is violated strongly in the case of successful phenomenological
textures for Y_nu, and the values of d_mu and/or d_e may be within the range of
interest for the future experiments.


title: Analytic Solution of Ground State for Coulomb Plus Linear Potential

abstract:
  The newly developed single trajectory quadrature method is applied to solve
the ground state quantum wave function for Coulomb plus linear potential. The
general analytic expressions of the energy and wave function for the ground
state are given. The convergence of the solution is also discussed. The method
is applied to the ground state of the heavy quarkonium system.


title: Introduction to sterile neutrinos

abstract:
  Model-building issues raised by the prospect of light sterile neutrinos are
discussed in a pedagogical way. I first review the na\"{\i}ve proposal that
sterile neutrinos be identified with ``right handed neutrinos''. A critical
discussion of the simple expedient of adding three gauge singlet fermions to
the usual minimal standard model matter content is followed by an examination
of right handed neutrinos in extended theories. I introduce the terminology of
``fully sterile'' and ``weakly sterile'' to classify varieties usually
conflated under the sterile neutrino banner. After introducing the concepts of
``technical naturalness'' and plain ``naturalness'', the unbearable lightness
of being a sterile neutrino is confronted. This problem is used to motivate
mirror neutrinos, whose connection with pairwise maximal mixing is emphasised.
Some brief remarks about phenomenology are made throughout. The impossibility
of identifying the sole sterile neutrino of the currently favoured $2 + 2$ and
$3 + 1$ phenomenological constructs as a lone gauge singlet fermion added to
the minimal standard model is explained. Finally, I remark on the beauty and
subtlety of light sterile neutrino cosmology.


title:
The Hosotani Mechanism in Bulk Gauge Theories with an Orbifold Extra
  Space S^1/Z_2

abstract:
  We pursue the possibility of the scenario in which the Higgs field is
identified with the extra-space component of a bulk gauge field. The space-time
we take is M$^{4}$ $\otimes$ S$^1$/Z$_2$. We show that a non-trivial
Z$_2$-parity assignment allows some of the extra-space component to have
radiatively induced VEV, which strongly modifies the mass spectrum and gauge
symmetry of the theory, realized by oribifolding. In particular we investigate
the dynamical mass generation of zero-mode fermion and spontaneous gauge
symmetry breaking due to the VEV. The gauge theories we adopt are a prototype
model SU(2) and SU(3) model, of special interest as the realistic minimal
scheme to incorporate the standard model SU(2) $\times$ U(1).


title: Inflationary Cosmology

abstract:
  The big bang model and the history of the early universe according to the
grand unified theories are introduced. The shortcomings of big bang are
discussed together with their resolution by inflationary cosmology. Inflation,
the subsequent oscillation and decay of the inflaton, and the resulting
"reheating" of the universe are studied. The density perturbations produced by
inflation and the temperature fluctuations of the cosmic background radiation
are discussed. The hybrid inflationary model is described. Two "natural"
extensions of this model which avoid the disaster encountered in its standard
realization from the overproduction of monopoles are presented. Successful
"reheating" satisfying the gravitino constraint takes place after the end of
inflation in all three versions of hybrid inflation. Adequate baryogenesis via
a primordial leptogenesis occurs consistently with the solar and atmospheric
neutrino oscillation data. The primordial lepton asymmetry is turned partly
into baryon asymmetry via the sphalerons which are summarized.


title: Virtual quarks, vacuum stability and scalar meson physics

abstract:
  Results are reviewed, which provide relations between the response (and
eventual instability) of the chiral QCD vacuum to an increase of the number of
massless quarks in the theory and the observed violations of the large $N_c$
expansion in the scalar meson sector, by combining chiral perturbation theory
expansions in $m_s$ with sum rule methods. An approach based on the
construction of scalar form-factors was recently confirmed by an independent
approach which uses the $\pi K$ scattering amplitudes.


title:
The solar neutrino spectrum derived from electron scattering and charged
  current interactions

abstract:
  We provide a method for extracting information on the energy spectrum of
solar neutrinos directly from the spectrum of scattered electrons. As an
example, we apply it to the published Super-Kamiokande data. When combined with
data from SNO on charged current interactions this method allows to derive
separately the spectra of nu_e and of nu_mu plus nu_tau.


title:
QED correction to asymmetry for polarized ep-scattering from the method
  of the electron structure functions

abstract:
  The electron structure function method is applied to calculate
model-independent radiative corrections to an asymmetry of electron-proton
scattering. The representations for both spin-independent and spin-dependent
parts of the cross-section are derived. Master formulae take into account the
leading corrections in all orders and the main contribution of the second order
next-to-leading ones and have accuracy at the level of one per mille. Numerical
calculations illustrate our analytical results for both elastic and deep
inelastic events.


title:
Neutrino masses and mixings in the MSSM with soft bilinear $R_p$
  violation

abstract:
  We analyse a simple RPV extension of the MSSM, with bilinear
  R-parity violation in the soft terms and vevs, but not between the terms in
the superpotential. The model gives two massive neutrinos, and can fit all
constraints from neutrino data. We show analytically how to compute the lepton
number violating Lagrangian parameters from neutrino masses and mixing angles.
Conversely, we numerically vary the bilinear couplings as input parameters to
determine the allowed ranges that are consistent with neutrino data. We briefly
comment on the implications of our bounds for low energy LFV processes.


title: Twisted Moduli and Supersymmetry Breaking

abstract:
  We consider twisted moduli contributions to supersymmetry breaking in
effective type I string constructions involving intersecting D5_i and D9-branes
using Goldstino angles to parametrise the supersymmetry breaking. It is well
known that twisted moduli enter at tree-level into the gauge kinetic functions,
and can provide new sources of gaugino mass if they develop F-term vacuum
expectation values. It is generally assumed that string states which are
sequestered from the twisted moduli receive a zero soft mass in the twisted
modulus domination limit, however the standard form of Kahler potential does
not reproduce this expectation. We therefore propose a new form of the Kahler
potential which is consistent at leading order with the sequestered form
proposed by Randall and Sundrum, and show that it leads to exponentially
suppressed sequestered soft masses. Including the effects of Green-Schwarz
mixing, we write down the soft scalar masses and trilinears arising from a type
I string construction involving intersecting D5_i and D9-branes in the presence
of untwisted and twisted moduli. If the squarks and sleptons are identified
with sequestered states then in the twisted moduli dominated limit this
corresponds to gaugino mediated supersymmetry breaking, and we discuss two
different scenarios for this. The general results will be useful for
phenomenological studies involving a combination of gravity and gaugino
mediated SUSY breaking due to the dilaton, untwisted and twisted moduli
contributions, and enable the soft masses to be studied as a function of the
different compactification radii.


title: Physics of Extra Dimensions

abstract:
  This article is based on papers discussing different aspects of extra
dimensional environments. In addition to the results, we review some of the
concepts on which models with large extra dimensions are based.


title: Supernovae as a probe of particle physics and cosmology

abstract:
  It has very recently been demonstrated by Csaki, Kaloper and Terning (CKT)
that the faintness of supernovae at high redshift can be accommodated by mixing
of a light axion with the photon in the presence of an intergalactic magnetic
field, as opposed to the usual explanation of an accelerating universe by a
dark energy component. In this paper we analyze further aspects of the CKT
mechanism and its generalizations. The CKT mechanism also passes various
cosmological constraints from the fluctuations of the CMB and the formation of
structure at large scales, without requiring an accelerating phase in the
expansion of the Universe. We investigate the statistical significance of
current supernova data for pinning down the different components of the
cosmological energy-momentum tensor and for probing physics beyond the standard
models.


title:
Relations for two body B Decays to Charmonium and tests for
  $\eta-\eta^{\prime}$ mixing

abstract:
  The two body decays of $B_d$ and $B_s$ decays into $J/\psi M$, where $M$ is a
light meson, is studied under the very simple assumptions that the spectator
quark does not play a role in the decay of the weak heavy quark or antiquark.
This hypothesis leads to interesting relations between decay amplitudes. The
assumption of SU(3) symmetry leads to additional relations between the decay
amplitudes and in particular, the eight CP eigenstates $J/\psi K_S$, $J/\psi
\eta$, $J/\psi \eta^{\prime}$ and $J/\psi \pi^o$ are all given in terms of 0.
If agreement with experiment validates these assumptions the parameters over
determined by the results will give information about the ratio of penguin to
tree contributions to the "golden channel" $B^o \to J/\psi K_S$ decay and will
provide tests for the standard $\eta-\eta^{\prime}$ mixing, which assumes that
this mixing is determined by a single mixing angle, as well as determine the
value of the mixing angle. We also present tests of the standard
$\eta-\eta^{\prime}$ mixing involving semileptonic $D$ decays.


title: Extracting V_{ub} Using the Radiative Decay Data

abstract:
  In this talk I review recent progress made in extracting V_{ub} from the cut
electron energy and hadronic mass spectra of inclusive B meson decays utilizing
the data from radiative decays. It is shown that an extraction is possible
without modeling the B meson structure function. I discuss the issues involving
the assumptions of local duality in various extractions. I also comment on the
recent CLEO extraction of V_{ub}.


title: QCD Baryons in the 1/N_c Expansion

abstract:
  The 1/N_c expansion provides a theoretical method for analyzing the
spin-flavor symmetry properties of baryons in QCD that is quantitative,
systematic and predictive. An exact spin-flavor symmetry exists for large-N_c
baryons, whereas for QCD baryons, the spin-flavor symmetry is approximate and
is broken by corrections proportional to the symmetry-breaking parameter 1/N_c
= 1/3. The 1/N_c expansion predicts a hierarchy of spin and flavor symmetry
relations for QCD baryons that is observed in nature. It provides a
quantitative understanding of why some SU(3) flavor symmetry relations in the
baryon sector, such as the Gell-Mann--Okubo mass formula, are satisfied to a
greater precision than expected from flavor symmetry-breaking suppression
factors alone.


title: Polarization Effects in B -> K_1(1270) + J/\Psi Decays

abstract:
  The joint angular distribution of the decay B \to J/\Psi V, where V is an
axial vector or vector resonance, followed by the subsequent decay processes of
the J/\Psi and V is calculated using the covariant density method. In
particular, the case where V is the axial vector meson K_1(1270) which decays
into K \rho is considered as well as the case that V is the vector meson
K^\ast(890) which decays into K \pi.


title: QCD Phenomenology and Light-Front Wavefunctions

abstract:
  A natural calculus for describing the bound-state structure of relativistic
composite systems in quantum field theory is the light-front Fock expansion
which encodes the properties of a hadrons in terms of a set of
frame-independent n-particle wavefunctions. Light-front quantization in the
doubly-transverse light-cone gauge has a number of remarkable advantages,
including explicit unitarity, a physical Fock expansion, the absence of ghost
degrees of freedom, and the decoupling properties needed to prove factorization
theorems in high momentum transfer inclusive and exclusive reactions. A number
of applications are discussed in these lectures, including semileptonic B-meson
decays, two-photon exclusive reactions, diffractive dissociation into jets, and
deeply virtual Compton scattering. The relation of the intrinsic sea to the
light-front wavefunctions is discussed. Light-front quantization can also be
used in the Hamiltonian form to construct an event generator for high energy
physics reactions at the amplitude level. The light-cone partition function,
summed over exponentially-weighted light-cone energies, has simple boost
properties which may be useful for studies in heavy ion collisions. I also
review recent work which shows that the structure functions measured in deep
inelastic lepton scattering are affected by final-state rescattering, thus
modifying their connection to light-front probability distributions. In
particular, the shadowing of nuclear structure functions is due to destructive
interference effects from leading-twist diffraction of the virtual photon,
physics not included in the nuclear light-cone wavefunctions.


title: Hard thermal loops and QCD thermodynamics

abstract:
  These lectures give an introduction to thermal perturbation theory, hard
thermal loops, and their use in a nonperturbative, approximately
self-consistent resummation of the thermodynamical potentials of quantum
chromodynamics.


title: Geophysical aspects of very long baseline neutrino experiments

abstract:
  Several proposed experiments will send beams of neutrinos through the Earth
along paths with a source-receiver distance of hundreds or thousands of
kilometers. Knowledge of the physical properties of the medium traversed by
these beams, in particular the density, will be necessary in order to properly
interpret the experimental data. Present geophysical knowledge allows the
average density along a path with a length of several thousand km to be
estimated with an accuracy of about $\pm 5$ per cent. Physicists planning
neutrino beam experiments should decide whether or not this level of
uncertainty is acceptable. If greater accuracy is required, intensive
geophysical research on the Earth structure along the beam path should be
conducted as part of the preparatory work on the experiments.


title: Violation of Sum Rules for Twist-3 Parton Distributions in QCD

abstract:
  Sum rules for twist-3 distributions are reexamined. Integral relations
between twist-3 and twist-2 parton distributions suggest the possibility for a
$\delta$-function at $x=0$. We confirm and clarify this result by constructing
$h_L$ and $h_L^3$ (quark-gluon interaction dependent part of $h_L$) explicitly
from their moments for a one-loop dressed massive quark. The physics of these
results is illustrated by calculating $h_L(x,Q^2)$ using light-front
time-ordered pQCD to ${\cal O}(\alpha_S)$ on a quark target. A $\delta(x)$ term
is also found in $e(x,Q^2)$, but not in $g_T(x,Q^2)$, to this order in ${\cal
O}(\alpha_S)$.


title: Baryon magnetic moments in the effective quark Lagrangian approach

abstract:
  An effective quark Lagrangian is derived from first principles through
bilocal gluon field correlators. It is used to write down equations for
baryons, containing both perturbative and nonperturbative fields. As a result
one obtains magnetic moments of octet and decuplet baryons without introduction
of constituent quark masses and using only string tension as an input. Magnetic
moments come out on average in reasonable agreement with experiment, except for
nucleons and $\Sigma^-$. The predictions for the proton and neutron are shown
to be in close agreement with the empirical values once we choose the string
tension such to yield the proper nucleon mass. Pionic corrections to the
nucleon magnetic moments have been estimated. In particular, the total result
of the two-body current contributions are found to be small. Inclusion of the
anomalous magnetic moment contributions from pion and kaon loops leads to an
improvement of the predictions.


title: Testing orbifold models of Supersymmetric Grand Unification

abstract:
  In a model of supersymmetric SU(5) Grand Unification with a spatial dimension
described by the orbifold $S^1/(Z_2 \times Z_2')$, proton decay is naturally
suppressed at all orders. This is achieved by a suitable implementation of the
discrete symmetries on the brane. But baryon number violating interactions are
present in this model. We propose a few possible experimental tests of this
model which exploit the effect of the baryon number violating couplings on
low-energy observables like neutron-antineutron oscillations, double nucleon
decay into two kaons, hadronic decay widths of the $Z$ boson, and $t \bar t$
production cross-section in Run II of the Tevatron.


title:
Top Quark Pair Production and Decay including Spin Effects at Hadron
  Colliders: Predictions at NLO QCD

abstract:
  Top quark-antiquark ($t\bar t$) pairs will be produced copiously at the
Tevatron collider and in huge numbers at the LHC. This will make possible
detailed investigations of the properties and interactions of this quark
flavor. The analysis and interpretation of future data requires precise
predictions of the hadronic production of $t\bar t$ pairs and of their
subsequent decays. In this talk the reactions $p {\bar p}, p p \to t{\bar t} +
X \to l^+ l'^- + X$ are considered and results are presented of our calculation
of the dilepton angular distribution at next-to-leading order QCD, keeping the
full dependence on the spins of the intermediate $t\bar{t}$ state. The angular
distribution is determined for different choices of reference axes that can be
identified with the $t$ and $\bar t$ spin axes. While the QCD corrections to
the leading-order distribution turn out to be small in the case of the LHC, we
find them to be sizeable in the case of the Tevatron and find, moreover, the
angular distribution to be sensitive to the parton content of the proton.


title:
Constraining Lorentz Violation Using Spectropolarimetry of Cosmological
  Sources

abstract:
  Spectropolarimetry of distant sources of electromagnetic radiation at
wavelengths ranging from infrared to ultraviolet are used to constrain Lorentz
violation. A bound of 3x10^{-32} is placed on coefficients for Lorentz
violation.


title: Constraints on self-interacting Q-ball dark matter

abstract:
  We consider different types of Q-balls as self-interacting dark matter. For
the Q-balls to act as the dark matter of the universe they should not
evaporate, which requires them to carry very large charges; depending on the
type, the minimum charge could be as high as Q \sim 10^{33} or the Q-ball
coupling to ordinary matter as small as \sim 10^{-35}. The
cross-section-to-mass ratio needed for self-interacting dark matter implies a
mass scale of m \sim O(1) MeV for the quanta that the Q-balls consist of, which
is very difficult to achieve in the MSSM.


title: Thermal phase transitions in cosmology

abstract:
  We review briefly the current status of thermal phase transitions within the
Standard Model and its simplest extensions. We start with an update on QCD
thermodynamics, then discuss the electroweak phase transition, particularly in
supersymmetric extensions of the Standard Model, and end with a few remarks on
the cosmological constraints that thermal phase transitions might impose on
even higher scale particle physics.


title:
Electric Field Effects and the Experimental Value of the Muon g-2
  Anomaly

abstract:
  The electric field corrections to the recently measured muon magnetic moment
g-2 anomaly are considered from both the classical (BMT) and the quantum
mechanical (Dirac) viewpoints. In both views, we prove that the electric field
inducing the horizontal betatron tune does not renormalize the anomaly
frequency. With this result kept in mind, the experimental muon magnetic moment
anomaly is in closer agreement with standard model predictions than has been
previously reported.


title: Brane Cosmology Solutions with Bulk Scalar Fields

abstract:
  Brane cosmologies with static, five-dimensional and Z_2 symmetric bulks are
analysed. A general solution generating mechanism is outlined. The qualatitive
cosmological behaviour of all such solutions is determined. Conditions for
avoiding naked bulk singularities are also discussed. The restrictions placed
on the solutions by the assumption of such a static bulk are investigated. In
particular the requirement of a non-standard energy-momentum conservation law.
The failure of such solutions to provide viable quintessence terms in the
Friedmann equations is also discussed.


title: Domain Wall Bubbles in High Energy Heavy Ion Collisions

abstract:
  It has been recently shown that meta-stable domain walls exist in
high-density QCD ($\mu\neq 0$) as well as in QCD with large number of colors
($N_c\to\infty$), with the lifetime being exponentially long in both cases.
Such metastable domain walls may exist in our world as well, especially in hot
hadronic matter with temperature close to critical. In this paper we discuss
what happens if a bubble made of such wall is created in heavy ion collisions,
in the mixed phase between QGP and hadronic matter. We show it will further be
expanded to larger volume $\sim 20 fm^3$ by the pion pressure, before it
disappears, either by puncture or contraction. Both scenarios leave distinctive
experimental signatures of such events, negatively affecting the interference
correlations between the outgoing pions.


title: Color Superconductivity and Blinking Proto-Neutron Stars

abstract:
  If quark matter exists in the cores of neutron stars, it is most likely color
superconducting. Thus a phase transition from free to paired quark matter might
occur during the first minute of proto-neutron star evolution. In this talk I
discuss how critical behavior of the medium will modify neutrino diffusion,
possibly leading to a short temporal variation in the neutrino signal detected
on Earth.


title: Semitopological Q-Rings

abstract:
  Semitopological Vortices (Q-Rings) are identified to be classical soliton
configurations whose stability is attributed to both topological and
nontopological charges. We discuss some recent work on the simplest possible
realization of such a configuration in a scalar field theory with an unbroken
U(1) global symmetry. We show that Q-Rings correspond to local minima of the
energy, exhibit numerical solutions of their field configurations and derive
virial theorems demonstrating their stability.


title: Instanton liquid at finite quark density

abstract:
  The interaction of light quarks and instanton liquid in the phase of nonzero
values of chiral condensate is studied at finite quark/baryon density.
Calculating the generating functional in the tadpole approximation we
investigate the behaviour of dynamical quark mass and chiral condensate
together with instanton liquid density (which shows insignificant increase) as
a function of quark/baryon chemical potential. We argue on the noticeable
increase of quark density at the point of developing the nonzero magnitude of
diquark condensate due only to the quark interaction with the instanton liquid.


title: Warm inflation dissipative dynamics

abstract:
  Warm inflation dynamics is reviewed. Results on dissipative scalar field
dynamics relevant to warm inflation are examined and estimates of radiation
production are given.


title: Scattering of Gluons from the Color Glass Condensate

abstract:
  We prove that the inclusive single-gluon production cross section for a
hadron colliding with a high-density target factorizes into the gluon
distribution function of the projectile, defined as usual within the DGLAP
collinear approximation, times the cross section for scattering of a single
gluon on the strong classical color field of the target. We then derive the
gluon-proton (nucleus) inelastic cross section and show that it is (up to
logarithms) infrared safe and that it grows slowly with center of mass energy.
Furthermore, we discuss jet transverse momentum broadening for the case of
nuclear targets. We show that in the saturation regime, in contrast to the
perturbative regime, the width of the transverse momentum distribution is
infrared finite and grows rapidly with energy and rapidity. In both regimes,
however, transverse momentum broadening exibits the same dependence on atomic
number A.


title: Heavy-quark parton distribution functions and their uncertainties

abstract:
  We investigate the uncertainties of the heavy-quark parton distribution
functions in the variable flavor number scheme. Because the charm- and
bottom-quark parton distribution functions (PDFs) are constructed predominantly
from the gluon PDF, it is a common practice to assume that the heavy-quark and
gluon uncertainties are the same. We show that this approximation is a
reasonable first guess, but it is better for bottom quarks than charm quarks.
We calculate the PDF uncertainty for t-channel single-top-quark production
using the Hessian matrix method, and predict a cross section of 2.12+0.32-0.29
pb at run II of the Tevatron.


title:
Measurement of the $B^+$ Total Cross Section and $B^+$ Differential
  Cross Section $d\sigma/dp_T$ in $p \bar p $ Collisions at $\sqrt{s}=1.8$ TeV

abstract:
  We present measurements of the B+ meson total cross section and differential
cross section $d\sigma/ dp_T$. The measurements use a $98\pm 4$ pb^{-1} sample
of $p \bar p$ collisions at $\sqrt{s}=1.8$ TeV collected by the CDF detector.
Charged $B$ meson candidates are reconstructed through the decay $B^{\pm} \to
J/\psi K^{\pm}$ with $J/\psi\to \mu^+ \mu^-$. The total cross section, measured
in the central rapidity region $|y|<1.0$ for $p_T(B)>6.0$ GeV/$c$, is $3.6 \pm
0.6 ({\rm stat} \oplus {\rm syst)} \mu$b. The measured differential cross
section is substantially larger than typical QCD predictions calculated to
next-to-leading order.


title: Analytic Amplitude Models for Forward Scattering

abstract:
  We report on fits of a large class of analytic amplitude models for forward
scattering against the comprehensive data for all available reactions. To
differentiate the goodness of the fits of many possible parametrizations to a
large sample of data, we developed and used a set of quantitative indicators
measuring statistical quality of the fits over and beyond the typical criterion
of the $\Chi^2 /dof$. These indicators favor models with a universal $ log^2 s$
Pomeron term, which enables one to extend the fit down to $\sqrt s = 4$ GeV.


title: Molecular States and 1^-+ Exotic Mesons

abstract:
  This work investigates whether the observed 1^-+ exotic mesons are molecular
states. We first use a potential model to calculate the spectra and lifetimes
of the f_0(980) and a_0(980), taken to be loosely bound molecular states of K
Kbar, then apply the same scenario to the 1^-+ exotic states pi_1(1400) and
pi_1(1600), assuming them to be pi eta(1295) and pi eta(1440) molecules
respectively. We derive the effective potential in the framework of field
theory at the hadronic level. Our results indicate that the present data on
pi_1(1400) and pi_1(1600) rule out the specific molecular ansatz. We show that
the lifetime of a loosely bound heavy-light molecule with enough angular
momentum is fully determined by the lifetimes of its constituent mesons.


title: Inclusive Gluon Production in DIS at High Parton Density

abstract:
  We calculate the cross section of a single inclusive gluon production in deep
inelastic scattering at very high energies in the saturation regime, where the
parton densities inside hadrons and nuclei are large and the evolution of
structure functions with energy is nonlinear. The expression we obtain for the
inclusive gluon production cross section is generated by this nonlinear
evolution. We analyze the rapidity distribution of the produced gluons as well
as their transverse momentum spectrum given by the derived expression for the
inclusive cross section. We propose an ansatz for the multiplicity distribution
of gluons produced in nuclear collisions which includes the effects of
nonlinear evolution in both colliding nuclei.


title: Color Superconductivity at Moderate Density

abstract:
  The effect of color breaking on colored quarks' chiral condensates has been
investigated at zero temperature and moderate baryon density. It is found that
the influence of the diquark condensate on different colored quarks is very
small.


title: $J/\psi$ suppression at SPS and RHIC energies

abstract:
  The strong suppression of the $J/\psi$ is studied in the framework of
hadronic and quark gluon plasma models. Predictions for RHIC energies are
presented.


title: What we can learn on inflation from recent CMBR data

abstract:
  We review the prediction of inflation and the constraints on inflationary
models coming from recent observations.


title: Is inflatino production during preheating a threat to nucleosynthesis?

abstract:
  We discuss the production of inflatino the superpartner of the inflaton due
to vacuum fluctuations during preheating and argue that they do decay alongwith
the inflaton to produce a thermal bath. Therefore they do not survive until
nucleosynthsis to pose a threat to it.


title:
Behavior of the Hadron Potential at Large Distances and Properties of
  the Hadron Spin-flip Amplitude

abstract:
  The impact of the form of the hadron potential at large distances on the
behaviour of the hadron spin-flip amplitude at small angles is examined. The
$t$-dependence of the spin-flip amplitude of high energy hadron elastic
scattering is analyzed under different assumptions on the hadron interaction.
It is shown that the long tail of the non-Gaussian form of the hadron potential
of the hadron interaction in the impact parameter representation leads to a
large value of the slope of the spin-flip amplitude (without the kinematical
factor $\sqrt{|t|}$) as compared with the slope of the spin-non-flip amplitude.
This effect can explain the form of the differential cross section and the
analyzing power at small transfer momenta. The methods for the definition of
the spin-dependent part of the hadron scattering amplitude are presented. A
possibility to investigate the structure of the hadron spin-flip amplitude from
the accurate measure of the differential cross section and the spin correlation
parameters is shown.


title: Theory versus experiments in heavy flavour production

abstract:
  I discuss the current status of the comparison between theoretical
predictions and experimental data, relevant to the production of open charm and
bottom quarks in photon-hadron and photon-photon collisions. I advocate the use
of a formalism that matches fixed-order computations to resummed computations
in order to make firm statements on heavy flavour production as described by
perturbative QCD.


title: Lepton Transmutation in the Dualized Standard Model

abstract:
  The successful explanation of fermion mixing and of the fermion mass
hierarchy by the Dualized Standard Model (DSM) scheme is based on the premises
of a fermion mass matrix rotating in generation space with changing scales at a
certain speed, which could in principle lead to sizeable flavour-violation
observable in high sensitivity experiments such as BaBar. However, a full
perturbative calculation to 1-loop order reported here shows that this
kinematical, flavour-violating effect of a rotating mass matrix is off-set in
the DSM by parallel effects from rotating wave functions and vertices giving in
the end only very small flavour-violations which are unlikely to be detectable
by present experiments. The result means that at least for the present the DSM
scheme has survived yet another threat to its validity, which is indeed its
most stringent and dangerous to-date. It also provides some clarification of
certain concepts connected with the rotating mass matrix which had previously
been found puzzling.


title: Inflationary perturbations with multiple scalar fields

abstract:
  The calculation of scalar gravitational and matter perturbations during
multiple-field inflation valid to first order in slow roll is discussed. These
fields may be the coordinates of a non-trivial field manifold and hence have
non-minimal kinetic terms. A basis for these perturbations determined by the
background dynamics is introduced, and the slow-roll functions are generalized
to the multiple-field case. Solutions for a perturbation mode in its three
different behavioural regimes are combined, leading to an analytic expression
for the correlator of the gravitational potential. Multiple-field effects
caused by the coupling to the field perturbation perpendicular to the field
velocity can even contribute at leading order. This is illustrated numerically
with an example of a quadratic potential. (The material here is based on
previous work by the authors presented in hep-ph/0107272.)


title: Angular Inflation from Supergravity

abstract:
  We study supergravity inflationary models where inflation is produced along
the angular direction. For this we express the scalar component of a chiral
superfield in terms of the radial and the angular components. We then express
the supergravity potential in a form particularly simple for calculations
involving polynomial expressions for the superpotential and Kahler potential.
We show for a simple Polonyi model the angular direction may give rise to a
stage of inflation when the radial field is fixed to its minimum. We obtain
analytical expressions for all the relevant inflationary quantities and discuss
the possibility of supersymmetry breaking in the radial direction while
inflating by the angular component.


title:
The description of multiplicity distributions in high energy
  $e^+e^-$annihilation within the framework of Two Stage Model

abstract:
  The Multiplicity distributions in high energy $e^+e^-$-annihilation are
described within the Two Stage Model. It is shown that oscillations in sign of
the ratio of factorial cumulant momentum to the factorial momentum of
increasing order are confirmed. Parameters of parton stage and hadronization of
this model are analysed.


title: A Statistical Approach to Leptonic Mixings and Neutrino Masses

abstract:
  Based on existing data, we argue for a peculiar structure of the neutrino
mass matrix, that has a block of relatively large elements--a dominant block.
We analyze this ansatz and extract its predictions, assuming that the O(1)
coefficients (that are needed to define the model fully) are random variables.
Further insights are obtained by postulating that this structure of the mass
matrix is due to U(1) selection rules, a la Froggatt and Nielsen. A
particularly interesting case emerges, when the angle theta(13) (namely, the
mixing U(e3)) is within reach for next generation experiments, and the large
mixing angle solution for solar neutrinos is the preferred one.


title: Applicability of the Friedberg-Lee-Zhao method

abstract:
  Friedberg, Lee and Zhao proposed a method for effectively evaluating the
eigenenergies and eigen wavefunctions of quantum systems. In this work, we
study several special cases to investigate applicability of the method.
Concretely, we calculate the ground-state eigenenergy of the Hellmann potential
as well as the Cornell potential, and also evaluate the energies of the systems
where linear term is added to the Coulomb and harmonic oscillator potentials as
a perturbation. The results obtained in this method have a surprising agreement
with the traditional method or the numerical results. Since the results in this
method have obvious analyticity compared to that in other methods, and because
of the simplicity for calculations this method can be applied to solving the
Schr\"{o}dinger equation and provides us better understanding of the physical
essence of the concerned systems. But meanwhile applications of the FLZ method
are restricted at present, especially for certain potential forms, but due to
its obvious advantages, it should be further developed.


title: Are Heavy Particles Boltzmann Suppressed?

abstract:
  Matsumoto and Yoshimura have recently argued that the number density of heavy
particles in a thermal bath is not necessarily Boltzmann-suppressed for T<<M,
as power law corrections may emerge at higher orders in perturbation theory.
This fact might have important implications on the determination of WIMP relic
densities. On the other hand, the definition of number densities in a
interacting theory is not a straightforward procedure. It usually requires
renormalization of composite operators and operator mixing, which obscure the
physical interpretation of the computed thermal average. We propose a new
definition for the thermal average of a composite operator, which does not
require any new renormalization counterterm and is thus free from such
ambiguities. Applying this definition to the annihilation model of Matsumoto
and Yoshimura we find that it gives number densities which are
Boltzmann-suppressed at any order in perturbation theory. We discuss also heavy
particles which are unstable already at T=0, showing that power law corrections
do in general emerge in this case.


title: Lattice QCD and the Unitarity Triangle

abstract:
  Theoretical and computational advances in lattice calculations are reviewed,
with focus on examples relevant to the unitarity triangle of the CKM matrix.
Recent progress in semi-leptonic form factors for B -> pi l nu and B -> D* l
nu, as well as the parameter \xi in B-Bbar mixing, are highlighted.


abstract:
  We summarise the present status of the proton spin problem and the physics
possibilities for future polarized ep and pp colliders. This summary is based
on the presentations and discussion sessions at the workshop ``The Spin
Structure of the Proton and Polarized Collider Physics'' (Trento, July 23-28,
2001).


title: Cumulative particle production and percolation of strings

abstract:
  Calculations of the production rate of particles with $x>1$ in nuclear
collisions due to the interaction of colour strings are presented. Momentum and
colour sum rules are used to determine the fragmentation functions of fused
strings. Mechanisms of the string interaction are considered with total and
partial overlapping in the transverse plane. The results reveal strong
dependence of the chosen mechanism. In the percolation scenario with partial
overlapping the $x$-dependence of the production rates agrees well with the
existing data. The magnitude of the rates for $\pi^+$ production is in
agreement with experiment. However the rates for the protons are substantially
below the data.


title: Soft and hard QCD dynamics in hadroproduction of charmonium

abstract:
  Both hard and soft QCD dynamics are important in charmonium production, as
presented here through a next-to-leading order QCD matrix element calculation
combined with the colour evaporation model. Observed $x_F$ and $p_\perp$
distributions of $J/\psi$ in hadroproduction at fixed target and $p\bar{p}$
collider energies are reproduced. Quite similar results can also be obtained in
a more phenomenologically useful Monte Carlo event generator where the
perturbative production of \ccbar pairs is instead obtained through leading
order matrix elements and the parton shower approximation of the higher order
processes. The soft dynamics may alternatively be described by the soft colour
interaction model, originally introduced in connection with rapidity gaps. We
also discuss the relative rates of different charmonium states and introduce an
improved model for mapping the continuous \ccbar mass spectrum on the physical
charmonium resonances.


title: A New Basis for QED Bound State Computations

abstract:
  A simple method to compute QED bound state properties is presented, in which
binding energy effects are treated non-perturbatively. It is shown that to take
the effects of all ladder Coulomb photon exchanges into account, one can simply
perform the derivative of standard QED amplitudes with respect to the external
momentum. For example, the derivative of the light-by-light scattering
amplitude gives an amplitude for orthopositronium decay to three photons where
any number of Coulomb photon exchanges between the e-e+ is included.
  Various applications are presented. From them, it is shown that binding
energy must be treated non-perturbatively in order to preserve the analyticity
of positronium decay amplitudes.
  Interesting perspectives for quarkonium physics are briefly sketched.


title: Mirror Matter as Self Interacting Dark Matter

abstract:
  It has been argued that the observed core density profile of galaxies is
inconsistent with having a dark matter particle that is collisionless and
alternative dark matter candidates which are self interacting may explain
observations better. One new class of self interacting dark matter that has
been proposed in the context mirror universe models of particle physics is the
mirror hydrogen atom whose stability is guaranteed by the conservation of
mirror baryon number. We show that the effective transport cross section for
mirror hydrogen atoms, has the right order of magnitude for solving the
``cuspy'' halo problem. Furthermore, the suppression of dissipation effects for
mirror atoms due to higher mirror mass scale prevents the mirror halo matter
from collapsing into a disk strengthening the argument for mirror matter as
galactic dark matter.


title:
$q \to \Lambda$ Fragmentation Function and Nucleon Transversity
  Distribution in a Diquark Model

abstract:
  Based on a simple quark-diquark model, we propose a set of unpolarized,
longitudinally polarized and transversely polarized fragmentation functions for
the $\Lambda$ by fitting the unpolarized $\Lambda$ production data in $e^+ e ^-
$ annihilation. It is found that the helicity structure of the obtained
$\Lambda$ fragmentation functions is supported by the all available
experimental data on the longitudinal $\Lambda$ polarization. Within the same
framework of the diquark model, the nucleon transversity distributions are
presented and consistent descriptions of the available HERMES data on the
azimuthal spin asymmetries in pion electroproduction are obtained. Furthermore,
the spin transfers to the transversely polarized $\Lambda$ in the charged
lepton DIS on a transversely polarized nucleon target are predicted for future
experiments.


title:
The Statistical Model of Hadrogenesis in A--A collisions from AGS to SPS
  and RHIC

abstract:
  We discuss experimental data on particle yields and particle spectra obtained
in heavy ion collisions in a very broad energy range from SIS/GSI through
AGS/BNL up to SPS/CERN and RHIC/BNL. We argue that in this broad energy range
hadronic yields and their ratios resemble a thermal equilibrium population
along a unified freeze--out curve determined by the condition of fixed
energy/particle = 1 GeV. At RHIC and top SPS, thermal parameters are consistent
within error with the critical conditions required for deconfinement. This,
together with the particular distribution of strangeness within a collision
fireball, could indicate that chemical equilibrium is a direct consequence of
parton to hadron transition, which populates a state of maximum entropy. At
lower energies equilibration in A--A collisions should appear through hadronic
interactions and rescatterings.


title: Evidence for SU(3) symmetry breaking from hyperon production

abstract:
  We examine the SU(3) symmetry breaking in hyperon semileptonic decays (HSD)
by considering two typical sets of quark contributions to the spin content of
the octet baryons: Set-1 with SU(3) flavor symmetry and Set-2 with SU(3) flavor
symmetry breaking in HSD. The quark distributions of the octet baryons are
calculated with a successful statistical model. Using an approximate relation
between the quark fragmentation functions and the quark distributions, we
predict polarizations of the octet baryons produced in $e^+e^-$ annihilation
and semi-inclusive deeply lepton-nucleon scattering in order to reveal the
SU(3) symmetry breaking effect on the spin structure of the octet baryons. We
find that the SU(3) symmetry breaking significantly affects the hyperon
polarization. The available experimental data on the $\Lambda$ polarization
seem to favor the theoretical predictions with SU(3) symmetry breaking. We
conclude that there is a possibility to get a collateral evidence for SU(3)
symmetry breaking from hyperon production. The theoretical errors for our
predictions are discussed.


title:
Anomalous Neutrino Interaction, Muon g-2, and Atomic Parity
  Nonconservation

abstract:
  We propose a simple unified description of two recent precision measurements
which suggest new physics beyond the Standard Model of particle interactions,
i.e. the deviation of $\sin^2 \theta_W$ in deep inelastic neutrino-nucleon
scattering and that of the anomalous magnetic moment of the muon. Our proposal
is also consistent with a third precision measurement, i.e. that of parity
nonconservation in atomic Cesium, which agrees with the Standard Model.


title: Heavy quarks and QCD matter

abstract:
  I present recent results on the theory of QCD matter production in high
energy heavy ion collisions and on the interactions of heavy quarks in such
environment. The centrality and rapidity dependence of hadron production is
evaluated in semi--classical approach. The energy loss of heavy quarks in
matter is computed. The heavy--to--light meson ratio (e.g., D/pion) at moderate
transverse momenta is demonstrated to be both sensitive to the density of color
charges in the medium and infrared stable.


title: Precision determination of Vub

abstract:
  We review how to determine |Vub| from inclusive semileptonic B decay using
combined cuts on the leptonic and hadronic invariant masses to eliminate the b
-> c background. This leads to a determination of |Vub| with theoretical
uncertainty at the 5 -10% level.


title: Small x divergences in a heavy quark-antiquark state

abstract:
  With the current state of similarity renormalisation group approach to
light-front QCD, it is possible to address with a degree of generality the
issue of light-cone zero modes. We find, contrary to earlier results in a less
general framework, that infrared divergences associated with the zero modes do
not cancel out in a color singlet heavy quark-antiquark states, except for the
lowest order in the nonrelativistic expansion.


title: A New Model-Independent Analysis of $B \to X_s \gamma$ in Supersymmetry

abstract:
  Using the example of the rare decay $B \to X_s \gamma$, we analyse the
importance of interference effects for the bounds on the parameters in the
squark mass matrices within the unconstrained MSSM. In former model-independent
analyses no correlations between the different sources of flavour violation
were taken into account. In our new analysis we include the contributions from
charged Higgs bosons, charginos and neutralinos and their interference effects
and, even more important, the effects that appear when several flavour
violating parameters, i.e. several off-diagonal elements in the squark mass
matrices, are switched on simultaneously. We derive new bounds on certain
off-diagonal elements of the squark-mass matrix which are in general one order
of magnitude weaker than the previous bounds.


title: High-Energy Asymptotics of Photon--Photon Collisions in QCD

abstract:
  The high-energy behaviour of the total cross section for highly virtual
photons, as predicted by the BFKL equation at next-to-leading order (NLO) in
QCD, is presented. The NLO BFKL predictions, improved by the BLM optimal scale
setting, are in excellent agreement with recent OPAL and L3 data at CERN LEP2.


title: Soft Gluon Approach for Diffractive Photoproduction of J/psi

abstract:
  We study diffractive photoproduction of $J/\psi$ by taking the charm quark as
a heavy quark. A description of nonperturbative effect related to $J/\psi$ can
be made by using NRQCD. In the forward region of the kinematics, the
interaction between the $c\bar c$-pair and the initial hadron is due to
exchange of soft gluons. The effect of the exchange can be studied by using the
expansion in the inverse of the quark mass $m_c$. At the leading order we find
that the nonperturbative effect related to the initial hadron is represented by
a matrix element of field strength operators, which are separated in the moving
direction of $J/\psi$ in the space-time. The S-matrix element is then obtained
without using perturbative QCD and the results are not based on any model.
Corrections to the results can be systematically added. Keeping the dominant
contribution of the S-matrix element in the large energy limit we find that the
imaginary part of the S-matrix element is related to the gluon distribution for
$x\to 0$ with a reasonable assumption, the real part can be obtained with
another approximation or with dispersion relation. Our approach is different
than previous approaches and also our results are different than those in these
approaches. The differences are discussed in detail. A comparison with
experiment is also made and a qualitative agreement is found.


title: Heavy quark symmetry in B -> D(*) ell nu spectra

abstract:
  We calculate heavy quark symmetry breaking in the slopes and curvatures of
the $B\to D^{(*)}\ell\bar\nu$ spectra at zero recoil, including the order
$\alpha_s^2\beta_0$ corrections. We point out that the theoretical
uncertainties in the differences between $B\to D$ and $B\to D^*$ slopes and
curvatures are smaller than in the deviations of the slopes and curvatures
themselves from their infinite mass limits. We find that the central values of
the current experimental results for the difference of the slopes differ from
our calculations when QCD sum rules are used to estimate subleading Isgur-Wise
functions. A better understanding of the shapes of the $B\to
D^{(*)}\ell\bar\nu$ spectra may also help to reduce the error of $|V_{cb}|$
extracted from the zero recoil limit of $B\to D^*\ell\bar\nu$. We argue that
heavy quark symmetry requires that the same fitting procedure be used in the
experimental determinations of the shape parameters and $|V_{cb}|$ from the
$B\to D\ell\bar\nu$ and $B\to D^{*}\ell\bar\nu$ spectra.


title: Measurement of Direct CP Violation by NA48

abstract:
  The NA48 experiment at the CERN SPS aims to search for direct CP violation in
the $K^0$ system through the measurement of ${\rm Re}(\epsilon'/ \epsilon)$
with high accuracy. In 1999 the NA48 collaboration has published its first
measuremen based on 1997 data. A new result, based on 1998 and 1999 data, is
presented in this article. The result, combined with 1997 data, ${\rm
Re}(\epsilon'/\epsilon) = (15.3 \pm 2.6)\times 10^{-4}$, contributes to the
precise determination of the size of direct CP violation.


title:
A new interpretation of the QCD phase transition and of strangeness as
  QGP signature

abstract:
  We address the question of how to identify the QCD phase transition using
measured light (u,d,s-structured) hadrons, without invoking comparison to the
QCD $\epsilon_c$ predictions, and extract $\epsilon_c$ from the data. We
analyse several particle and nuclear collisions and extract their chemical
freeze-out temperature $T$ at zero baryochemical potential ($\mu_B$). We find
at $\mu_B=0$ a universal rise and saturation of both the $T$ and of the
strangeness suppression factor $\lambda_s$ (=$\frac {2\bar{s}} {\bar{u} +
\bar{d}} $) with increasing initial energy density ($\epsilon_i$). The onset of
saturation of both $T$ and $\lambda_s$, is interpreted as due to the event of
the QCD phase transition. The critical energy density is estimated to be
$\epsilon_c$ $\sim$ 1 +0.3 -0.5 GeV/fm$^3$, corresponding approximately to a
$\sqrt{s}$ of $\sim$ 8.8 GeV for central Pb+Pb collisions. Concerning the role
of strangeness, we identify trivial and non-trivial sources of strangeness
enhancement: The peak of $\lambda_s$ in Pb+Pb collisions at $\sqrt{s}$=8.8 GeV
and other phenomena of 'strangeness enhancement' defined with respect to p+p
data, are trivially traced back to the different baryochemical potentials and
$\epsilon_i$ of the compared systems. A non trivial redefined '$\lambda_s$
enhancement' is however also present. The netbaryonfree $\lambda_s$ limit is
estimated to be approximately reached in Au+Au collisions at the LHC.


title: Colour Reconnection at LEPII

abstract:
  The preliminary results on the search of colour reconnection effects (CR)
from the four experiments at LEP, Aleph, Delphi, L3 and Opal, are reviewed.
Extreme models are excluded by studies of standard variables, and on going
studies of a method first suggested by L3, the particle flow method, are yet
inconclusive.


title: Soft interactions (presented at ISMD31)

abstract:
  A brief introduction to the theory and phenomenology of soft interactions is
given, focusing on total and elastic cross sections and multiparticle
production.


title:
Measurement of Inclusive $f_1(1285)$ and $f_1(1420)$ Production in $Z$
  Decays with the DELPHI Detector

abstract:
  Inclusive production of two $(K\bar K\pi)^0$ states in the mass region
1.22--1.56 GeV in $Z$ decay at LEP I has been observed by the DELPHI
Collaboration. The measured masses and widths are $1274\pm4$ and $29\pm12$ MeV
for the first peak and $1426\pm4$ and $51\pm14$ MeV for the second. A
partial-wave analysis has been performed on the $(K\bar K\pi)^0$ spectrum in
this mass range; the first peak is consistent with the quantum numbers
$I^G(J^{PC})=0^+(0^{-+}/1^{++})$ and the second with $I^G(J^{PC})=0^+(1^{++})$.
These measurements, as well as their total hadronic production rates per
hadronic $Z$ decay, are consistent with the mesons of the type $n\bar n$, where
$n=\{u,d\}$. They are very likely to be the $f_1(1285)$ and the $f_1(1420)$,
respectively.


title: Dual Properties of the Structure Functions

abstract:
  By using the concept of duality between direct channel resonances and Regge
exchanges we relate the small- and large-$x$ behavior of the structure
functions. We show that even a single resonance exhibits Bjorken scaling at
large $Q^2$.


title: Excitation of non-quark degrees of freedom in N*

abstract:
  We study the contribution of glueball and sigma-meson degrees of freedom to
nucleon excited states in the framework of a chiral version of the
chromodielectric model. We have found that these degrees of freedom
considerably lower the energy of the Roper and may substantially weaken the
electroexcitation amplitudes for the N(1440) and in particular for the N(1710).


title: Gluon Saturation at small x

abstract:
  At very high energies, the relevant component of the hadron wavefunction can
be described as a Color Glass Condensate, i.e., a state of high density gluonic
matter whose distribution is random, but frozen over the relevant time scales.
The weight function for this distribution obeys a renormalization group
equation in the form of a functional Fokker-Planck equation. Its solution leads
to an effective theory which predicts gluon saturation at sufficiently high
energy, or small Bjorken's $x$.


title: The gluon plasma at RHIC

abstract:
  Differential elliptic flow and particle spectra are calculated from covariant
Boltzmann transport theory taking into account the finite transport opacity of
the gluon plasma produced in Au+Au at $E_{cm}\sim 130$ $A$ GeV at RHIC. The
solutions are shown to depend mainly on the transport opacity, $\chi=\int dz
\sigma_t\rho_g$. The elliptic flow saturation pattern reported by STAR
indicates that $\chi_{b=0} \sim 25$, i.e., the gluon plasma is $\sim 80$ times
more opaque than the pQCD estimate based on HIJING. Such large opacities are
also consistent with the measured charged hadron spectra.


title: Thermalization and elliptic flow at RHIC

abstract:
  We discuss signatures of thermalisation in heavy ion collisions based on
elliptic flow. We then propose a new method to analyse elliptic flow, based on
multiparticle azimuthal correlations. This method allows one to test
quantitatively the collective behaviour of the interacting system.


title:
Hadronization mechanisms and spin effects in high energy fragmentation
  processes

abstract:
  Spin effects in high energy fragmentation processes can provide us with
important information on hadronization mechanisms and spin structure of
hadrons. It can in particular give new tests to the hadronization models. In
this talk, we make a brief introduction to the different topics studied in this
connection and a short summary of the available data. After that, we present a
short summary of the main theoretical results we obtained in studying these
different topics. The talk was mainly based on the publications [4-8] which
have been finished in collaboration with C.Boros, Liu Chun-xiu and Xu Qing-hua.


title: Particle Production in High-energy Heavy-ion Collisions

abstract:
  Particle production mechanisms in high-energy heavy-ion collisions are
reviewed in connection with recent experimental data from RHIC. Implications on
mini-jet production, parton saturation and jet quenching are discussed.


title: Heavy flavor production at HERA

abstract:
  Recent results of open charm and beauty production in electron proton
scattering at HERA are presented. In photoproduction, the measured cross
sections for charm exceed fixed order NLO QCD calculations. Experimental
evidence supports the hypothesis that a significant fraction of photoproduction
events with charm can be described by resolved photon processes, where the
charm quark is a constituent of the resolved photon. In deep inelastic
scattering the NLO calculations give in general a fairly reasonable description
of the observed charm cross sections. The measurements of the structure
function $F_2^{cc}$ show that, at large photon virtualities and low x, the
events with charm constitute a major part of the total ep cross section. The
beauty cross sections both in photoproduction and in DIS exceed NLO
predictions.


title: Event shape studies, \boldmath{$\alpha_s$} and its running from LEP

abstract:
  Data from electron positron annihilations at different center of mass
energies are collected by the four LEP experiments. Direct tests of hard QCD
are performed by measuring and analysing event shape observables.


title:
Probing colour separate singlet states in $e^+ e^-$ annihilation at
  $Z^0$ pole

abstract:
  By selecting two-jet like events and employing sensitive observable, we find
that two kinds of colour connections at the hard-soft interface lead to
significantly differences in hadron states.


title: Study of gluon fragmentation and colour octet neutralization in DELPHI

abstract:
  Using the full statistics of the DELPHI experiment at $\sqrt{s}=91 GeV$ 3-jet
events are selected and gluon respectively quark jet enriched subsamples are
defined. The leading systems of the two kinds of jets are determined using
rapidity gaps. The sum of charges of the leading systems is studied. It is
found that for gluon-jets there is a significant excess of leading systems with
total charge zero when compared to Monte Carlo simulations with JETSET. The
corresponding leading systems of quark-jets do not exhibit such an excess. The
mass spectra of the leading systems with total charge zero are studied.


title: Soft Particle Production at HERA

abstract:
  HERA data on soft hadron production are discussed. The measured inclusive and
exclusive hadron cross sections show a simple scaling behaviour.


title: Why the Very High Multiplicity events are rare

abstract:
  The possibility to suppress the nonperturbative effects choosing the vary
high multiplicity final state is discussed. The theoretical uncertainties and
the experimental observable consequence of this choice are discussed.


title: Structure of the final states in Higgs production at Hadronic Colliders

abstract:
  We quantify the rate and the signal-to-background ratio for Higgs $\to
b\bar{b}$ detection in double-diffractive events at the Tevatron and the LHC.
The signal is predicted to be very small at the Tevatron, but observable at the
LHC. We exemplify the diagnostic power of hadronic antenna pattern by
considering the topology of hadronic flow corresponding to Higgs $\to b\bar{b}$
events.


title: The underlying event in jet and minimum bias events at the Tevatron

abstract:
  We describe a study of the underlying event in jet and minimum bias events
using data from the CDF detector. The underlying event contribution to the jet
energy has been calculated in jet events and compared to the results of two
Monte Carlo programs: Herwig and Pythia. The analysis has been carried out at
two different center of mass energies: $\sqrt{s}=$1800 and 630 GeV. For most
observables, good agreement is obtained with at least one of the Monte Carlo
programs. Neither program describes all features of the data.


title: Measurements of Higher Order Effects in QCD from the Tevatron Collider

abstract:
  Quantum Chromodynamics has been studied extensively at Fermilab's Tevatron
collider. Between 1992 and 1996 the D{\O}and CDF experiments, each accumulated
approximately $100 \mathrm{pb}^{-1}$ of proton-antiproton collisions at a
center-of-mass energy $\sqrt{s}=1800 \mathrm{GeV}$ and $\sim 0.5
\mathrm{pb}^{-1}$ at $\sqrt{s}=630 \mathrm{GeV}$. In this paper, we present
selected recent measurements of higher order effects in QCD: multiple jet
production and subjet and charged particle multiplicities in quark and gluon
jets.


title: Hard Inelastic Interactions at Parton and Hadron Level

abstract:
  In the study of multiple scattering of partons in hadron-hadron collisions
the possibility of a hard inelastic process at the parton level is included in
its simplest possible way, $i.e.$ including the $2 \to 3$ transition.
  The specific physical process to which the treatment is applied is the
inelastic collision of a nucleon with a heavy nucleus


title:
Centrality Dependence of Baryon and Meson Momentum Distributions in $pA$
  Collisions

abstract:
  The proton and neutron inclusive distributions in the projectile
fragmentation region of $pA$ collisions are studied in the valon model.
Momentum degradation and flavor changes due to the nuclear medium are described
at the valon level using two parameters. Particle production is treated by
means of the recombination subprocess. Pion inclusive distributions can be
calculated without any adjustable parameters.


title:
Double parton scattering processes in $pp$ collisions and the scale
  factors

abstract:
  The double parton collisions become increasingly important at high energies.
The scale factors are the dimensional parameters which characterize these
interactions and are the physical observables that can provide a first
quantitative information on the correlations in the hadron structure.


title: Color-flavor locking in strange stars, strangelets, and cosmic rays

abstract:
  Three topics with relation to color superconductivity in strange quark matter
are discussed. 1) The r-mode instability in strange stars, which is consistent
with the existence of ``ordinary'' strange quark matter stars but inconsistent
with strange stars in a pure color-flavor locked state. 2) Color-flavor locked
strangelets, which are more bound than normal strangelets, and have a different
charge-mass relation. 3) Estimates of the strangelet flux in cosmic rays, which
is relevant for strangelet detections in upcoming cosmic ray space experiments.


title:
Global analysis of Solar neutrino oscillation evidence including SNO and
  implications for Borexino

abstract:
  An updated analysis of all available neutrino oscillation evidence in Solar
experiments including the latest $SNO$ data is presented. Predictions for total
rates and day-night asymmetry in Borexino are calculated. Our analysis features
the use of exhaustive computation of the neutrino oscillation probabilities and
the use of an improved statistical $\chi^2$ minimization.
  In the framework of two neutrino oscillations we conclude that the best fit
to the data is obtained in the LMA region with parameters $(\Delta m^2,
\tan^2\theta) = (5.2 \times 10^{-5} \eV^2, 0.47)$, ($\chi^2_{min}/n=0.82$,
$n=38$ degrees of freedom). Although less favored, solutions in the LOW and VAC
regions are still possible with a reasonable statistical significance. The best
possible solution in the SMA region gets as maximum a statistical significance
as low as $\sim 3%$.
  We study the implications of these results for the prospects of Borexino and
the possibility of discriminating between the different solutions. The expected
normalized Borexino signal is 0.62 at the best fit LMA solution while the DN
asymmetry is negligible (approximately $10^{-5}$). In the LOW region the signal
is in the range $\sim 0.6-0.7$ at 90% confidence level while the asymmetry is
$\simeq 1-20%$. As a consequence, the combined Borexino measurements of the
total event rate with a error below $\pm 5-10%$ and day-night total rate
asymmetry with a precision comparable to the one of SuperKamiokande, will have
a strong chance of distinguishing or at least strongly favoring one of the
Solar neutrino solutions provided by present data.


title: Resummation and power corrections by Dressed Gluon Exponentiation

abstract:
  Event-shape distributions in $e^+e^-$ annihilation offer a unique lab oratory
for understanding perturbative and non-perturbative aspects of QCD. Dressed
Gluon Exponentiation is a resummation method designed to evaluate differ ential
cross sections close to a kinematic threshold and provide the basis for
parametrization of power corrections. The method and its application in the
case of the thrust and the heavy jet mass distributions in the two-jet region
are briefly presented.


title: QCD Processes at the LHC

abstract:
  The study of QCD processes at the LHC will serve two main goals. First the
predictions of QCD will be tested and precision measurements will be performed.
Second QCD processes represent a major part of the background to other Standard
Model processes and signals of new physics at the LHC and thus need to be
understood precisely in the new kinematic region available here. Furthermore,
the production cross-sections for almost all processes are controlled by QCD.


title: Recent Results from PHENIX

abstract:
  I report on results from the PHENIX collaboration for the first RHIC run,
where gold ions were collided at $\sqrt{s_{NN}}=130 GeV$.
  In order to study initial conditions, PHENIX has measured the ratio between
anti-protons and protons, the transverse energy, and charged multiplicity as a
function of collision centrality. These measurements allows us to extract some
information on the initial density of created partons, the baryon density, the
energy density, and particle production. In order to probe the formation of a
possible new state of matter, PHENIX has measured the neutral pion and
unidentified hadron transverse momentum spectra. We find a deficit compared to
the the expectations from simple nucleon-nucleon scaling. These novel results
are consistent with expectations that high $p_T$ leading particles will be
suppressed in the presence of the formation of a plasma.


title: Hard QCD: some results

abstract:
  I recall some points on the present status of QCD results in the short
distance regions and illustrate the case of event shape in QCD radiation


title: New Results from NA49

abstract:
  We present recent results of the SPS experiment NA49 on production of strange
particles and event-by-event fluctuations of mean $p_t$ and of charged particle
ratios in central Pb+Pb collisions at various beam energies (40, 80, 158 AGeV)
as well as in different collisions at 158 AGeV, going from p+p over light-ion
collisions to peripheral and central Pb+Pb.


title: A Monte Carlo Study on the Identification of Quark and Gluon Jets

abstract:
  Three jets events in the e$^+$e$^-$ collisions at 91.2 GeV are investigated
using both HERWIG and JETSET Monte Carlo generators. The angles between the
three jets are used to identify the quark and gluon jets. The analysis at
parton level is done to ensure the reasonableness of this method and an angular
cut is ultilized to improve the purity of this identification. The multiplicity
inside the identified quark or gluon jets agree with the QCD predictions.


title:
Closing talk for the XXXI International Symposium on Multiparticle
  Dynamics (ISMD)

abstract:
  I will use this opportunity on the one hand to comment upon some of the many
interesting results that have been presented at this meeting, on the other hand
to discuss some new features that we have recently learned on the structure and
properties of the Lund Model both with respect to the fragmentation of
multigluon string states and the partonic cascades based upon perturbative QCD.


title:
Strangeness Production as a Diagnostic Tool for Understanding Heavy Ion
  Reactions

abstract:
  Strangeness production has long been proposed as a diagnostic tool for
understanding the dynamics of relativistic heavy ion collisions. In this
presentation we review the traditional picture of strangeness enhancement as a
signature for quark-gluon plasma formation. We then review, in order, some
experimental data on strange particle production in $e^{+}e^{-}$, $pp$,
$p\bar{p}$, proton-nucleus and nucleus-nucleus collisions. This is not a
comprehensive review, but rather an emphasis of a few significant points. Any
clear interpretation of strange particle yields measured in heavy ion reactions
is impossible without a physical understanding of the production mechanisms in
elementary particle collisions.


title: Perturbative QCD and Regge theory: closing the circle

abstract:
  We explain how Regge theory and perturbative evolution may be made compatible
at small x. The result not only gives striking support to the two-pomeron
description of small-x behaviour, but gives a rather clean test of perturbative
QCD itself. When x is very small, or Q^2 is very large, the proton's gluon
distribution function is significantly larger than is commonly believed.
Perturbative evolution is invalid below Q^2\approx 5 GeV^2.


title: Asymmetric Bose-Einstein effect

abstract:
  Recent results on modelling Bose-Einstein effect in Monte Carlo generators
for a source with no spherical symmetry (as seen in the data on $Z^0$ hadronic
decays) are reported. Modifications of the weight method necessary for $W^+W^-$
decays are presented and some preliminary results concerning the "inter-$W$"
interference effects are discussed.


title: Centrality Behaviour of J/$\psi$ Production in Na50

abstract:
  The J/$\psi$ production in 158 A GeV Pb-Pb interactions is studied, in the
dimuon decay channel, as a function of centrality, as measured with the
electromagnetic or with the very forward calorimeters. After a first sharp
variation at mid centrality, both patterns continue to fall down and exhibit a
curvature change at high centrality values. This trend excludes any
conventional hadronic model and is in agreement with a deconfined quark-gluon
phase scenario. We report also preliminary results on the measured charged
multiplicity, as given by a dedicated detector.


title: Slepton Pair Production at a Linear Collider

abstract:
  Accurate theoretical calculations of slepton pair production processes at
threshold are necessary for an accurate determination of slepton masses. We
discuss the gauge invariant calculation of these processes for selectron and
smuon pairs, including finite width effects and Coulomb corrections. Energy
cuts to reduce irreducible supersymmetric backgrounds are presented.


title:
Nonlocal operators and distribution amplitudes of definite twist,
  WW-like relations, BC-like sum rules and power corrections for hard QCD
  processes

abstract:
  The decomposition of nonlocal operators (and of their matrix elements) into
an (infinite) series w.r.t. geometric twist is used to introduce (new) parton
distributions, generalized parton distributions and hadron wave functions of
definite twist. Their comparision with the conventional distributions (of
definite dynamical twist) leads to Wandzura-Wilczek like relations,
Burkhardt-Cottingham like sum rules and allows for power corrections of the
various distribution amplitudes. Some general aspects are reviewed.


title:
On the Effect of theta_{13} on the Determination of Solar Oscillation
  Parameters at KamLAND

abstract:
  If the solution to the solar neutrino puzzle falls in the LMA region, KamLAND
should be able to measure with good precision the corresponding oscillation
parameters after a few years of data taking. Assuming a positive signal, we
study their expected sensitivity to the solar parameters (theta_{12},Delta
m^2_{21}) when considered in the framework of three-neutrino mixing after
taking into account our ignorance on the mixing angle theta_{13}. We find a
simple ``scaling'' dependence of the reconstructed theta_{12} range with the
value of theta_{13} while the Delta m^2_{12} range is practically unaffected.
Our results show that the net effect is approximately equivalent to an
uncertainty on the overall neutrino flux normalization of up to sim 10 %.


title:
Study of relativistic bound states for scalar theories in Bethe-Salpeter
  and Dyson-Schwinger formalism

abstract:
  The Bethe-Salpeter equation for Wick-Cutkosky like models is solved in
dressed ladder approximation. The bare vertex truncation of the Dyson-Schwinger
equations for propagators is combined with the dressed ladder Bethe-Salpeter
equation for the scalar S-wave bound state amplitudes. With the help of
spectral representation the results are obtained directly in Minkowski space.
We give a new analytic formula for the resulting equation simplifying the
numerical treatment. The bare ladder approximation of Bethe-Salpeter equation
is compared with the one with dressed ladder. The elastic electromagnetic form
factors is calculated within the relativistic impulse approximation.


title: On Building Better Cone Jet Algorithms

abstract:
  We discuss recent progress in understanding the issues essential to the
development of better cone jet algorithms.


title:
Large extra dimensions, the galaxy power spectrum and the end of
  inflation

abstract:
  We consider the production of gravitational KK modes via cosmological
photon-photon and electron-positron annihilation in models with large
factorisable extra dimensions. We place constraints on this production using
recent results from a joint analysis of the power spectra of the 2dF Galaxy
Redshift Survey (2dFGS) and the cosmic microwave background (CMB) anisotropies.
We obtain a more accurate upper limit for the temperature corresponding to
matter-radiation equality and show that, even for the case of 6 extra
dimensions and a fundamental scale of 1 TeV, a period of inflation is required
that ends at a temperature much lower than that of the QCD phase transition.


title: High Energy Tau Neutrinos

abstract:
  The intrinsic tau neutrino flux from cosmological and astrophysical sources
has usually been considered negligible in comparison to the electron and muon
neutrino fluxes. However, the inclusion of the tau neutrino component coming
from hadronic decay at the source can significantly modify the tau neutrino
spectrum expected at Earth. We report our results on the high energy tau
neutrino production and its implications for the observation of high energy
neutrino events.


title:
Single particle inclusive spectra, HBT and elliptic flow; a consistent
  picture at RHIC?

abstract:
  In these proceedings we will present the preliminary identified single
particle inclusive spectra, the identified particle elliptic flow and the HBT
versus the reaction plane measured with the STAR detector at RHIC. So far none
of the theoretical space-time models has been able to describe the combination
of these measurements consistently. In order to see if our measurements can be
understood in the context of a simple hydro-motivated blast wave model we
extract the relevant parameters for this model, and show that it leads to a
consistent description of these observables.


title: Unbiased gluon jet multiplicity from e$^+$e$^-$ three-jet events

abstract:
  The charged particle multiplicities of two- and three-jet events from the
reaction e$^+$e$^-$,\to $Z$^0 \to hadrons$ are measured for Z$^0$ decays to
light quark (uds) flavors, using the data sample of the OPAL Collaboration at
LEP. Using recent theoretical expressions to account for biases from event
selection, results corresponding to unbiased gluon jets are extracted. The
unbiased gluon jet data are compared to corresponding results for quark jets.
We determine the ratio $r \equiv \ngluon/\nq$ of multiplicities between gluon
and quark jets as a function of energy scale. We also determine the ratio of
slopes, $r^{(1)} \equiv ({\mathrm{d}}\ngluon /{\mathrm{d}}y) /({\mathrm{d}}\nq
/ {\mathrm{d}}y)$, and of curvatures, $r^{(2)} \equiv ({\mathrm{d}}^2\ngluon
/{\mathrm{d}}y^2) /({\mathrm{d}}^2\nq / {\mathrm{d}}y^2)$, where $y$ specifies
the energy scale. At 30 GeV, we find $r = 1.422\pm0.051$, $r^{(1)} =
1.761\pm0.071$ and $r^{(2)} = 1.98\pm0.13$, where the uncertainties are the
statistical and systematic terms added in quadrature. These results are in
general agreement with theoretical predictions.


title: Heavy Ion Physics at LHC

abstract:
  The study of heavy ion interactions constitutes an important part of the
experimental program outlined for the Large Hadron Collider under construction
at CERN and expected to be operational by 2006. ALICE is the single detector
having the capabilities to explore at the same time most of the characteristics
of high energy heavy ion interactions. Specific studies of jet quenching and
quarkonia production, essentially related to $\mu$ detection are also planned
by CMS.


title:
Systematics of Charged Particle Production in Heavy-Ion Collisions with
  the PHOBOS Detector at RHIC

abstract:
  The multiplicity of charged particles produced in Au+Au collisions as a
function of energy, centrality, rapidity and azimuthal angle has been measured
with the PHOBOS detector at RHIC. These results contribute to our understanding
of the initial state of heavy ion collisions and provide a means to compare
basic features of particle production in nuclear collisions with more
elementary systems.


title:
Multiple Production, Transport in Atmosphere and Detection of High
  Energy Cosmic Rays

abstract:
  We describe the general aspects of Monte Carlo Collision Generators suitable
for cosmic ray nucleon-Air and nuclei-Air interactions, including accelerator
and collider data. The problem of the extrapolation at 3 energy decades above
the LHC of the main features of high energy collisions is discussed and under
theoretical and phenomenological assumptions, the properties of the
longitudinal and lateral development of giant extensive air showers simulated
with the CORSIKA program are presented. The determination of the primary energy
near $10^{20}$ eV is examined for different observables, total size, densities
of charged particles interpolated at 600~m from shower core. The extensive air
shower data collected around LHC energy is in better agreement with models of
large multiplicities. Beyond this energy, the extrapolation carried assuming
the diquark breaking mechanism can change the classic conversion to primary
energy and such circumstance can have consequences on the validity of the GZK
cut off. In those conditions, we have simulated large and giant air showers
taking into account, in addition, new processes, such as diquark breaking, and
topological problems involving adequate structure functions for lateral
distributions, up to energies exceeding $10^{20}$ eV for P.AUGER and EUSO
experiments.


title: Dark matter and gamma rays from the galactic halo

abstract:
  The nature of the dark matter in the halo of our Galaxy is still largely
unknown. The microlensing events found so far towards the Large Magellanic
Cloud suggest that at most about 20% of the halo dark matter is in the form of
MACHOs (Massive Astrophysical Compact Halo Objects). The dark matter could
also, at least partially, consist of cold molecular clouds (mainly $H_2$).
Another possibility is that WIMPs (Weakly Interacting Massive Particles) make
up the dark matter and that, due to annihilition processes, they show up
through gamma-ray emission.


title: Experimental Studies of Diffractive Processes at the Tevatron

abstract:
  We review the diffractive measurements made by the CDF and D\O\
collaborations during Run I at the Tevatron and summarize the detector upgrades
relevant for the Run II diffractive physics program.


title: The Diffractive Logarithmic Slope and the Saturation Phenomena

abstract:
  The logarithmic slope of the diffractive structure function is a potential
observable scanning the hard and soft contributions in diffraction, allowing to
disentangle the QCD dynamics. We report our calculations concerning this
quantity, in particular the estimates emerging from the saturation model
applied to diffraction dissociation.


title:
Interferometry in astrophysics as a roadmap for interferometry in
  multiparticle dynamics

abstract:
  Interferometry is one of the most powerful experimental tools of modern
astrophysics. Some of its methods are considered in view of potential
applicability to studies of correlations in multiparticle dynamics.


title:
Chapman-Enskog expansion of the Boltzmann equation and its diagrammatic
  interpretation

abstract:
  We perform a Chapman-Enskog expansion of the Boltzmann equation keeping up to
quadratic contributions. We obtain a generalized nonlinear Kubo formula, and a
set of integral equations which resum ladder and extended ladder diagrams. We
show that these two equations have exactly the same structure, and thus provide
a diagrammatic interpretation of the Chapman-Enskog expansion of the Boltzmann
equation, up to quadratic order.


title: Photon splitting in atomic fields

abstract:
  Photon splitting due to vacuum polarization in the electric field of an atom
is considered. We survey different theoretical approaches to the description of
this nonlinear QED process and several attempts of its experimental
observation. We present the results of the lowest-order perturbation theory as
well as those obtained within the quasiclassical approximation being exact in
the external field strength. The experiment where photon splitting was really
observed for the first time is discussed in details. The results of this
experiment are compared with recent theoretical estimations.


title: The Status of Charmonium Production in Photon-Photon Collisions

abstract:
  The status of Charmonium production in photon-photon collisions is briefly
reviewed. I would like to mention that although the preliminary data were
obtained in experiment, the theoretical investigation is not in a compatible
status.


title: Saturation in DIS processes

abstract:
  We examine HERA data with a view of determining whether unique signs of
saturation can be identified. Concentrating on two channels the logarithmic
slope of $F_{2}$, and the production of $J/\Psi$, which are sensitive to the
behaviour of $xG(x,Q^{2})$ the gluon density distribution in the proton, we
show that our model incorporating screening corrections and alternative models
comprising a sum of a "soft" and "hard" component provide good fits to the
data.


title: Bose-Einstein Correlations in WW Events at LEP2

abstract:
  Analyses of Bose-Einstein Correlations in $\rW^{+}\rW^{-}$ events at LEP2 by
the four LEP collaborations are presented. In particular, Bose-Einstein
correlations in $\rW^{+}\rW^{-}$ overlap are investigated and the possible
existence of these correlations between particles coming from different W's,
which may influence the W-mass measurements in the fully hadronic channel
$\re^{+}\re^{-}\to \rW^{+}\rW^{-}\to\rq_1 \bar{\rq}_2 \rq_3 \bar{\rq}_4 $. No
evidence for such an inter-W Bose-Einstein correlation is found. The results
are preliminary.


title: A Simple Model for the BFKL-DGLAP Transition

abstract:
  A simple model for the gluon structure function at small $x$ is presented,
which gives an intuitive picture of the transition between the DGLAP and B FKL
regimes.