title:
Applications of Nonrelativistic Effective Field Theories to quarkonium
  systems with a small radius

abstract:
  We review some predictions of nonrelativistic effective field theories for
heavy quark-antiquark systems with a small typical radius, r<1/\Lambda_QCD.


title: Analytical calculations of four-neutrino oscillations in matter

abstract:
  We analytically derive transition probabilities for four-neutrino
oscillations in matter. The time evolution operator giving the neutrino
oscillations is expressed by the finite sum of terms up to the third power of
the Hamiltonian in a matrix form, using the Cayley-Hamilton theorem. The result
of computation for the probabilities in some mass patterns tells us that it is
realistically difficult to observe the resonance between one of three active
neutrinos and the fourth (sterile) neutrino near the earth, even if the fourth
neutrino exists.


title: Leptogenesis and Low energy CP violation, a link

abstract:
  How is CP violation of low energy related to CP violation required from
baryon number asymmetry ? We give an example which shows a direct link between
CP violation of neutrino oscillation and baryogenesis through leptogenesis.


title: Vertex Operators of Open String States in the Intersecting D-brane World

abstract:
  Starting with a new bosonization scheme for the \beta\gamma CFT of the
super-conformal ghosts, vertex operators are constructed for massless open
string states in the intersecting D-brane world. These vertex operators satisfy
all requirements for a consistent RNS formulation of superstring theories, so
GSO projections can be properly taken.


title: Non-Singlet Structure Functions at Three Loops: Fermionic Contributions

abstract:
  We compute the fermionic (n_f) contributions to the flavour non-singlet
structure functions in unpolarized electromagnetic deep-inelastic scattering at
third order of massless perturbative QCD. Complete results are presented for
the corresponding nf-parts of the three-loop anomalous dimension and the
three-loop coefficient functions for the structure functions F_2 and F_L. Our
results agree with all partial and approximate results available in the
literature. The present calculation also facilitates a complete determination
of the threshold-resummation parameters B_2 and D_2^DIS of which only the sum
was known so far, thus completing the information required for the
next-to-next-to-leading logarithmic resummation. We find that D_2^DIS vanishes
in the MSbar scheme.


title: Meson Production and Spectroscopy at HERA

abstract:
  Selected recent results from the H1 and ZEUS experiments are reviewed,
illustrating some of the many facets of ``meson physics'' at the HERA ep
collider. The results cover exclusive elastic and proton-dissociative
diffractive vector meson production and comparisons with recent theoretical
calculations show that perturbative QCD models are successful in describing
these processes when at least one of the involved scales have large values.
Furthermore a search for odderon induced exclusive photoproduction of
pseudoscalar and tensor mesons is described; upper limits for the cross
sections are below recent theoretical predictions. Finally the status of open
charm meson spectroscopy in inclusive final states is reported.


title: Dynamics of Particle Production in Relativistic Nuclear Collisions

abstract:
  Saturation models for particle production in relativistic nuclear collisions
are discussed. In particular, I show that the predictions from the high density
QCD for the qualitative shape of $dN/dy$ are very sensitive to the form of the
unintegrated gluon distribution.


title: Current Status of Neutrino Masses and Mixings

abstract:
  The evidences in favor of solar and atmospheric neutrino oscillations are
briefly reviewed and shown to be gracefully accommodated in the framework of
three-neutrino mixing with bilarge mixing.


title: Neutrino Spectrum Distortion Due to Oscillations and its BBN Effect

abstract:
  We study the distortion of electron neutrino energy spectrum due to
oscillations with the sterile neutrino nu_e <-> nu_s, for different initial
populations of the sterile state delta N_s at the onset of oscillations. The
influence of this spectrum distortion on Big Bang Nucleosynthesis is analyzed.
Only the case of an initially empty sterile state was studied in previous
publications.
  The primordial abundance of He-4 is calculated for all possible delta N_s:
0<= delta N_s<= 1 in the model of oscillations, effective after electron
neutrino decoupling, for which the spectrum distortion effects on the
neutron--proton transitions are the strongest.
  It is found that the spectrum distortion effect may be the dominant one not
only in the case of small delta N_s, but also in the case of big initial
population of nu_s. For example, in the resonant case it may play a
considerable role even for very big delta N_s ~ 0.8.


title: Massive quark effects in two flavor color superconductors

abstract:
  The high density effective theory formalism (HDET) is employed to describe
high density QCD with two massive flavors (2SC). The gap equation is derived
and explicitly solved for the gap parameter. The parameters associated to the
pseudo Nambu-Goldstone boson of $U(1)_A$ are evaluated in the limit
$\mu\to\infty$ and $m/\mu$ fixed. In particular we find for the velocity of the
NG boson the relation
$v^2=\sqrt{\mu_1^2-m_1^2}\sqrt{\mu_2^2-m_2^2}/3\mu_1\mu_2$.


title:
Role of lepton flavor violating (LFV) muon decay in Seesaw model and
  LSND

abstract:
  The aim of the work is to study LFV in a newly proposed Seesaw model of
neutrino mass and to see whether it could explain LSND excess. The motivation
of this Seesaw model was that there was no new physics beyond the TeV scale. By
studying \mu \to 3e in this model, it is shown that the upper bound on the
branching ratio requires Higgs mass m_{h} of a new scalar doublet with lepton
number L=-1 needed in the model has to be about 9 TeV. The predicted branching
ratio for \mu \to e\nu_{l}\bar{\nu}_{l} is too small to explain the LSND. PACS:
11.30.Hv, 14.60.Pq


title:
Higher Orders in A(\alpha_s)/[1-x]_+ of Non-Singlet Partonic Splitting
  Functions

abstract:
  We develop a simplified method for obtaining higher orders in the
perturbative expansion of the singular term A(\alpha_s)/[1-x]_+ of non-singlet
partonic splitting functions. Our method is based on the calculation of eikonal
diagrams. The key point is the observation that the corresponding cross
sections exponentiate in the case of two eikonal lines, and that the exponent
is directly related to the functions A(\alpha_s) due to the factorization
properties of parton distribution functions. As examples, we rederive the one-
and two-loop coefficients A^(1) and A^(2). We go on to derive the known general
formula for the contribution to A^(n) proportional to N_f^{n-1}, where N_f
denotes the number of flavors. Finally, we determine the previously
uncalculated term proportional to N_f of the three-loop coefficient A^(3) to
illustrate the method. Our answer agrees with the existing numerical estimate.
The exact knowledge of the coefficients A^(n) is important for the resummations
of large logarithmic corrections due to soft radiation. Although only the
singular part of the splitting functions is calculable within our method,
higher-order computations are much less complex than within conventional
methods, and even the calculation of A^(4) may be possible.


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

abstract:
  We discuss the pair production of charginos in collisions of polarized
photons $\gamma\gamma \to \tilde{\chi}_i^+ \tilde{\chi}_i^-$, ($i=1,2$) and the
subsequent leptonic decay of the lighter chargino $\tilde{\chi}_1^+ \to
\tilde{\chi}_1^0 e^+ \nu_e$ including the complete spin correlations.
Analytical formulae are given for the polarization and the spin-spin
correlations of the charginos. Since the production is a pure QED process the
decay dynamics can be studied separately. For high energy photons from Compton
backscattering of polarized laser pulses off polarized electron beams numerical
results are presented for the cross section, the angular distribution and the
forward-backward asymmetry of the decay positron. Finally we study the
dependence on the gaugino mass parameter $M_1$ and on the sneutrino mass for a
gaugino-like MSSM scenario.


title: The NuTeV Anomaly, Neutrino Mixing, and a Heavy Higgs

abstract:
  Recent data from NuTeV prefer a heavy Higgs in contrast to the LEP/SLD data
which prefer a light Higgs. I argue that if the Z-nu-nu coupling is suppressed,
as would be the case if the neutrinos mixed with a heavy gauge singlet state,
then both sets of data will be consistent with a heavy Higgs.


title: Recoil momentum spectrum in directional dark matter detectors

abstract:
  Directional dark matter detectors will be able to record the recoil momentum
spectrum of nuclei hit by dark matter WIMPs. We show that the recoil momentum
spectrum is the Radon transform of the WIMP velocity distribution. This allows
us to obtain analytic expressions for the recoil spectra of a variety of
velocity distributions. We comment on the possibility of inverting the recoil
momentum spectrum and obtaining the three-dimensional WIMP velocity
distribution from data.


title:
Measuring the prompt atmospheric neutrino flux with down-going muons in
  neutrino telescopes

abstract:
  In the TeV energy region and above, the uncertainty in the level of prompt
atmospheric neutrinos would limit the search for diffuse astrophysical
neutrinos. We suggest that neutrino telescopes may provide an empirical
determination of the flux of prompt atmospheric electron and muon neutrinos by
measuring the flux of prompt down-going muons. Our suggestion is based on the
consideration that prompt neutrino and prompt muon fluxes at sea level are
almost identical.


title:
Cosmic Solutions in the Einstein-Weinberg-Salam Theory and the
  Generation of Large Electric and Magnetic Fields

abstract:
  In the SU(2)_L x U(1)_Y standard electroweak theory coupled with the Einstein
gravity, new topological configurations naturally emerge, if the spatial
section of the universe is globally a three-sphere (S^3) with a small radius.
The SU(2)_L gauge fields wrap the space nontrivially, producing homogeneous but
anisotropic space. As the universe expands, large electric and magnetic fields
are produced. The electromagnetic field configuration is characterized by the
Hopf map.


title: Studying the Bell--Steinberger relation

abstract:
  The Bell--Steinberger relation is analyzed. The questionable points of the
standard derivation of this relation are discussed. It is shown that the use of
a more accurate approximation than the one usually used in the derivation of
this relation can lead to corrections to the right hand side of the standard
Bell--Steinberger relation.


title: Reanalysis of Azimuthal Spin Asymmetries of Meson Electroproduction

abstract:
  The azimuthal spin asymmetries for pion production in semi-inclusive deep
inelastic scattering of unpolarized charged lepton beams on longitudinally
polarized nucleon targets, are reanalyzed by taking into account an important
sign correction to previous formulas. It is found that different approaches of
distribution functions and fragmentation functions may lead to distinct
predictions on the azimuthal asymmetries measured in the HERMES experiments,
thus the available data cannot be considered as a direct measurement of quark
transversity distributions, although they still can serve to provide useful
information on these distributions and on T-odd fragmentation functions.
Predictions of the azimuthal spin asymmetries for kaon production are also
presented, with different approaches of distribution and fragmentation
functions. The unfavored fragmentation functions cannot be neglected for $K^-$
and $K^0_S$ production in semi-inclusive deep inelastic processes.


title: Understanding the proton spin "puzzle" with a new "minimal" quark model

abstract:
  We investigate the spin structure of the nucleon in an extended Jaffe-Lipkin
quark model. In addition to the conventional $3q$ structure, different
$(3q)(Q\bar{Q})$ admixtures in the nucleon wavefunction are also taken into
account. The contributions to the nucleon spin from various components of the
nucleon wavefunction are discussed. The effect due to the Melosh-Wigner
rotation is also studied. It is shown that the Jaffe-Lipkin term is only
important when antiquarks are negatively polarized. We arrive at a new
"minimal" quark model, which is close to the naive quark model, in order to
understand the proton spin "puzzle".


title: Recent lattice results relevant for heavy ion collisions

abstract:
  I summarize recent lattice results on QCD at finite temperatures and
densities. Studies on the nature of the QCD transition at the physical point,
continuum extra polations of thermodynamic quantities, and new calculations of
hadronic spectral functions applying the maximum entropy method are discussed.
Recent advances in finite density QCD are also reviewed.


title:
Long Baseline Neutrino Experiments and the LOW solution -- What is Left
  to Do and How Well Can It Be Done

abstract:
  The neutrino community is convinced that if the LMA solution is indeed
correct, the prospects for next-generation, long-baseline neutrino experiments
are very exciting. In this work we will argue that the prospects are not less
exiting if the answer to the solar neutrino puzzle lies in the LOW region. For
this purpose we explore the oscillation probabilities which are accessible to
experiments which employ conventional neutrino beams. We consider the electron
(anti)neutrino appearance channel, which provides information regarding not
only the small $U_{e3}$-element of the leptonic mixing matrix but also the
neutrino mass hierarchy, and also include information, which should come from
the muon (anti)neutrino disappearance channel, regarding the magnitude of the
atmospheric mass-squared difference ($|\Delta m^2_{13}|$) and mixing angle
($\theta_{23}$). We comment on the presence of ambiguities and the experiments
needed to solve them.


title:
Baryonic coherent state formation from small domain disoriented chiral
  condensates

abstract:
  Rare hyperon yields such as the Omega and AntiOmega in heavy ion collision
experiments are hard to be reproduced by numerical models. This, in combination
with the thermal fit to SPS data, seems to call for a new production mechanism
beyond the usual ones. Small domain disoriented chiral condensates (DCC) were
proposed to be such a source of rare hyperons through skyrmion formation at the
chiral phase transition. Here skyrmions are treated as coherent states of
baryons on a compact manifold so that the distribution of baryons produced from
a skyrmion can be known. From this more refined treatment, the number of
topological defects produced are more than doubled to 30 or more and the domain
size at the SPS is found to be even smaller than before at 1.1--1.5 fm. IT IS
IMPERATIVE THEREFORE NOT TO USE ONLY PION DISTRIBUTION BUT OTHER MEANS FOR
OBSERVING DCC.


title:
Self-interacting dark matter from an SU(3)_L \otimes U(1)_N electroweak
  model

abstract:
  Recently has been showed that models which consider self-interacting
particles as dark matter candidates can be able to account all the
discrepancies between N-body simulations and astronomical observations of the
galactic structure. In the present work we show that the 3-3-1-electroweak
model can provide a realistic candidate to this kind of dark matter. This dark
matter particle is not arbitrarily imposed and no new symmetry is need for to
stabilize it.


title:
On the heavy Majorana neutrino and light sneutrino contribution to
  \bm{$e^{-}e^{-} \to \ell^{-} \ell^{-}$}, (\bm{$\ell=\mu,\tau)$}

abstract:
  The cross section for the reaction $e^{-}e^{-} \to \ell^-\ell^-$
($\ell=\mu,\tau$) is calculated in models with heavy Majorana neutrinos
mediating lepton number violating amplitudes at the loop level. The
contributing four-point functions are evaluated exactly (numerically) taking
into account the full propagator dependence on external momenta, thereby
extending %an earlier approximate low energy calculation to the energy range of
interest for the next linear colliders an earlier approximate low energy
calculation. The amplitude shows a non-decoupling behaviour relative to the
heavy Majorana neutrino masses, but due to the stringent bounds on heavy-light
mixing the signal cross section attains observable values only for the less
constrained $\tau$ signal. The cross section induced by lepton number violation
in the $SU(2)_L$ doublet sneutrino sector of supersymmetric extensions of the
standard model is constrained by the upper limits on neutrino masses and
probably too tiny to be observable.


title:
The Energy Dependence of the Saturation Momentum from RG Improved BFKL
  Evolution

abstract:
  We study the energy dependence of the saturation momentum in the context of
the collinearly improved Leading and Next to Leading BFKL evolution, and in the
presence of saturation boundaries. We find that the logarithmic derivative of
the saturation momentum is varying very slowly with Bjorken-x, and its value is
in agreement with the Golec-Biernat and Wusthoff model in the relevant x
region. The scaling form of the amplitude for dipole-dipole or dipole-hadron
scattering in the perturbative side of the boundary is given.


title:
The process $\mu \to \nu_{e}e\bar{\nu}_{\mu} $in the 2HDM with flavor
  changing neutral currents

abstract:
  We consider the process $\mu \to \nu_{e}e\bar{\nu}_{\mu} $in the framework of
a two Higgs doublet model with flavor changing neutral currents (FCNC). Since
FCNC generates in turn flavor changing charged currents in the lepton sector,
this process appears at tree level mediated by a charged Higgs boson exchange.
  From the experimental upper limit for this decay, we obtain the bound $|
\xi_{\mu e}/m_{H^{\pm}}| \leq 3.8\times 10^{-3}$ where$ \xi_{\mu e} $refers to
the mixing between the first and second lepton generations, and $m_{H^{\pm}}
$denotes the mass of the charged Higgs boson. This bound is independent on the
other free parameters of the model. In particular, for $m_{H^{\pm}}\simeq
100$GeV we get $| \xi_{e\mu}| $ $\lesssim 0.38$


title:
Measuring the CP-Violating Phase by a Long Baseline Neutrino Experiment
  with Hyper-Kamiokande

abstract:
  This is a contribution paper of the XXth International Conference on Neutrino
Physics and Astrophysics (Neutrino2002) and YITP workshop.


title: Associated W+/- H-/+ production at e+ e- and hadron colliders

abstract:
  We show some results in the minimal supersymmetric Standard Model (MSSM) and
the two Higgs doublet model (THDM) for W+/- H-/+ production cross sections at
e+ e- and hadron colliders. We demonstrate that the predictions for the cross
sections in the two models can be vastly different. Observing these processes,
once the existence of a charged Higgs is established, might shed some light on
the underlying model for an extended Higgs sector.


title: The meson $B_c$ annihilation to leptons and inclusive light hadrons

abstract:
  The annihilation of the $B_c$ meson to leptons and inclusive light hadrons is
analyzed in the framework of nonrelativistic QCD (NRQCD) factorization. We find
that the decay mode, which escapes from the helicity suppression, contributes a
sizable fraction width. According to the analysis, the branching ratio due to
the contribution from the color-singlet component of the meson $B_c$ can be of
order (10^{-2}). We also estimate the contributions from the color-octet
components. With the velocity scaling rule of NRQCD, we find that the
color-octet contributions are sizable too, especially, in certain phase space
of the annihilation they are greater than (or comparative to) the color-singlet
component. A few observables relevant to the spectrum of charged lepton are
suggested, that may be used as measurements on the color-octet and
color-singlet components in the future $B_c$ experiments. A typical long
distance contribution in the annihilation is estimated too.


title: Shape of Deconstruction

abstract:
  We construct a six-dimensional Maxwell theory using a latticized extra space,
the continuum limit of which is a shifted torus recently discussed by Dienes.
This toy model exhibits the correspondence between continuum theory and
discrete theory, and give a geometrical insight to theory-space model building.


title: Neutrino factories - Physics potential and present status

abstract:
  I briefly review the recent status of research on physics potential of
neutrino factories including the discussions on parameter degeneracy.


title:
Heavy Quarkonium Potential and inclusive decay widths in terms of Wilson
  loops

abstract:
  We briefly summarize some results obtained by potential NRQCD in the non
perturbative regime: 1) a systematic procedure to obtain the heavy quarkonium
potential in the 1/m expansion (with explicit expressions up to O(1/m^2) in
terms of Wilson loops), and 2) a description of the heavy quarkonium inclusive
decays to light particles, and of the NRQCD matrix elements (also the octet
ones), in terms of the wave-function at the origen and some gluonic
field-strength correlators.


title: Spontaneous CP violation in supersymmetric models

abstract:
  We briefly comment on the question of spontaneous CP violation for several
models of weak interactions. We focus on one of the minimal extensions of the
Standard Model where spontaneous CP violation is viable,the next-to-minimal
supersymmetric standard model (NMSSM), with two Higgs doublets and a gauge
singlet. We analyse the most general Higgs potential without a discrete Z_3
symmetry, and derive an upper bound on the mass of the lightest neutral Higgs
boson. We estimate $\epsilon_K$ by applying the mass insertion approximation,
finding that in order to account for the observed CP violation in the neutral
kaon sector a non-trivial flavour structure in the soft-breaking A-terms is
required and that the upper bound on the lightest Higgs-boson mass becomes
stronger. We also discuss the implications of electric dipole moments of the
electron and the neutron in SUSY models with SCPV.


title: High energy astrophysical neutrinos

abstract:
  High energy neutrinos with energy typically greater than tens of thousands of
GeV may originate from several astrophysical sources. The sources may include,
for instance, our galaxy, the active centers of nearby galaxies, as well as
possibly the distant sites of gamma ray bursts. I briefly review some aspects
of production and propagation as well as prospects for observations of these
high energy astrophysical neutrinos.


title: Solar Neutrinos: Interpretation of Results

abstract:
  Recent SNO results give strong evidence that the solar neutrinos undergo the
flavor conversion. Main issue now is the identification of the mechanism of
conversion. The LMA MSW solution with $\Delta m^2 = (5 - 7) \cdot 10^{-5}$
eV$^2$, $\tan^2 \theta = 0.35 - 0.45$ looks rather plausible: it fits well the
experimental data and our new theoretical prejudices. In the LMA case, KamLAND
should see (0.5 - 0.7) reduced signal. VAC-QVO and LOW are accepted at about
$3\sigma$-level. The SMA solution is practically excluded. No sub-leading
effects produced by $U_{e3}$ and admixture of sterile neutrino have been found.
The fit becomes worse with increase of $U_{e3}$ (for LMA) and the $\nu_s$
admixture. Still (30 - 50)% presence of the sterile neutrino is allowed.
Solutions based on the neutrino spin-flip in the magnetic fields of the Sun as
well as on non-standard neutrino interactions give good fit of the data. If
KamLAND confirms LMA MSW, the spin-flip and non-standard interactions can be
considered (and will be searched for) as sub-leading effects.


title: Axions and Axion-like Particles

abstract:
  I review the theoretical motivation for the axion and present an update of
the experimental status of axion searches. I finally comment on some aspects of
the physics of axion-like particles.


title:
The sensitivity of the zero position of the forward--backward asymmetry
  to new physics effects in the B -> K^\ast \mu^+ \mu^- decay

abstract:
  Starting with the most general effective Hamiltonian comprising scalar and
vector operators beyond the standard model, we discuss the impact of various
operators on the zero of the forward--backward asymmetry in the dileptonic B
decay B -> K^\ast \mu^+ \mu^-. We find that, zero of the asymmetry is highly
sensitive to the sign and size of the vector--vector operators and opposite
chirality counterparts of the usual operators. The scalar--scalar four--fermion
operators, on the other hand, have mild effect on the zero of the asymmetry.
Our results are expected to be checked in the near future experiments.


title: Time Variations in the Scale of Grand Unification

abstract:
  We study the consequences of time variations in the scale of grand
unification, $M_U$, when the Planck scale and the value of the unified coupling
at the Planck scale are held fixed. We show that the relation between the
variations of the low energy gauge couplings is highly model dependent. It is
even possible, in principle, that the electromagnetic coupling $\alpha$ varies,
but the strong coupling $\alpha_3$ does not (to leading approximation). We
investigate whether the interpretation of recent observations of quasar
absorption lines in terms of time variation in $\alpha$ can be accounted for by
time variation in $M_U$. Our formalism can be applied to any scenario where a
time variation in an intermediate scale induces, through threshold corrections,
time variations in the effective low scale couplings.


title: Polarized J/psi production from B mesons at the Tevatron

abstract:
  In the framework of NRQCD and parton model, we estimate in detail,the
production cross section for polarized J/psi from B meson decays. In order to
contrast with data, we also take into account additional J/psi production due
to decay of excited charmonium states. We calculate the helicity parameter,
alpha, and as an application, we study our results for the Tevatron. This is in
contrast to the earlier studies which were performed for prompt J/psi
production from p pbar collisions. Our estimates are, for J/psi from B decays,
alpha_{J/psi} = -0.04 +- 0.06 and for B decays to psi', alpha_{psi'}= -0.03 +-
0.07. These results have been evaluated in the J/psi transverse momentum
interval, 10 GeV < k_T < 30 GeV. In the limit of the color singlet model, alpha
shows a direct dependence on the Peterson parameter, thereby reflecting the
dynamics of the b quark hadronization. With Run II of the Tevatron, it is
expected that the fits for alpha will improve by about a factor of 50, leading
to better limits on the matrix elements.


title:
Chiral Symmetry Restoration and Deconfinement of Light Mesons at Finite
  Temperature

abstract:
  There has been a great deal of interest in understanding the properties of
quantum chromodynamics (QCD) for a finite value of the chemical potential and
for finite temperature. Studies have been made of the restoration of chiral
symmetry in matter and at finite temperature. The phenomenon of deconfinement
is also of great interest, with studies of the temperature dependence of the
confining interaction reported recently. In the present work we study the
change of the properties of light mesons as the temperature is increased. For
this study we make use of a Nambu--Jona-Lasinio (NJL) model that has been
generalized to include a covariant model of confinement. The parameters of the
confining interaction are made temperature-dependent to take into account what
has been learned in lattice simulations of QCD at finite temperature. The
constituent quark masses are calculated at finite temperature using the NJL
model. A novel feature of our work is the introduction of a temperature
dependence of the NJL interaction parameters. (This is a purely
phenomenological feature of our model, which we do not attempt to derive from
more fundamental considerations.) With the three temperature-dependent aspects
of the model mentioned above, we find that the mesons we study are no longer
bound when the temperature reaches the critical temperature, $T_c$, which we
take to be 170 MeV. We believe that ours is the first model that is able to
describe the interplay of chiral symmetry restoration and deconfinement for
mesons at finite temperature. The introduction of temperature-dependent
coupling constants is a feature of our work whose further consequences should
be explored in future work.


title: Radiative Corrections to SUSY processes in the MSSM

abstract:
  We review the status of radiative corrections to SUSY processes. We present
the method of the on-shell renormalization for the sfermion and the
chargino/neutralino system and work out the appropriate renormalization
conditions. In particular, we discuss slepton, squark, chargino and neutralino
production in e+ e- collisions and the two-body decays of sfermions and of
Higgs bosons into SUSY particles. It is necessary to take into account
radiative corrections in the precision studies possible at a future linear e+
e- collider.


title: The Kaon Form Factor in the Light-Cone Quark Model

abstract:
  The electromagnetic form factor of the kaon meson is calculated in the
light-cone formalism of the relativistic constituent quark model. The
calculated $K^+$ form factor is consistent with almost all of the available
experimental data at low energy scale, while other properties of kaon could
also be interrelated in this representation with reasonable parameters.
Predictions of the form factors for the charged and neutral kaons at higher
energy scale are also given, and we find non-zero $K^0$ form factor at $Q^2 \ne
0$ due to the mass difference between the strange and down quarks inside $K^0$.


title: Statistical hadronization of charmed quarks at SPS and RHIC

abstract:
  Production of open and hidden charm hadrons in heavy ion collisions is
considered within the statistical coalescence model. The charmed
quark-antiquark pairs are assumed to be created at the initial stage of the
reaction in hard parton collisions. The number of these pairs is conserved
during the evolution of the system. At the hadronization stage, the charmed
(anti)quarks are distributed among open and hidden charm hadrons in accordance
with the laws of statistical mechanics.
  The model is in agreement with the experimental data on J/psi to Drell-Yan
ratio in Pb+Pb collisions at SPS. This agreement can be reached only if a
rather strong enhancement of the open charm production in central Pb+Pb
collisions is assumed. A possible mechanism of the charm enhancement is
discussed.
  At the top RHIC energy, the model predicts an increase of J/psi to Drell-Yan
ratio in more central nucleus-nucleus collisions with respect to less central
ones.


title:
Extracting the Pomeron-Pomeron Cross Section from Diffractive Mass
  Spectra

abstract:
  We have calculated the mass distribution ($d\sigma/dM_X$) as observed by UA8
Collaboration in the inclusive reaction $p \bar p \to p X \bar p$ at $\sqrt s =
630 GeV$, using the Interacting Gluon Model (IGM) with Double Pomeron Exchange
included. The only new parameter is the $IP IP$ cross section, which we can
extract from fitting experimental data. We compare our results with the values
obtained in the UA8 study. Assuming a constant Pomeron-Pomeron total cross
section ($\sigma_{IP IP} = 1 mb$), we make predictions for $d\sigma/dM_X$ at
Tevatron and LHC energies.


title:
Two-Component Approach to $J/\Psi$ Production in High-Energy Heavy-Ion
  Collisions

abstract:
  The production of charmonia in ultrarelativistic heavy-ion collisions is
investigated including two sources. These are a primordial contribution coupled
with various phases of dissociation, and a statistical coalescence of $c$ and
$\bar{c}$ quarks at the hadronization phase transition. Within a schematic
fireball evolution, SPS data on $J/\Psi$ production can be reasonably well
reproduced. Remaining discrepancies in the $\Psi'/\Psi$ ratio are discussed.
Predictions for the $J/\Psi$ centrality dependence at RHIC energies are
confronted with first data from PHENIX. The pertinent excitation function of
the $N_{J/\Psi}/N_{c\bar{c}}$ ratio exhibits a characteristic minimum structure
signaling the transition from the standard $J/\Psi$ suppression scenario (SPS)
to predominantly statistical production (RHIC).


title:
Determination of $\alpha_s$ from Gross-Llewellyn Smith sum rule by
  accounting for infrared renormalon

abstract:
  We recapitulate the method which resums the truncated perturbation series of
a physical observable in a way which takes into account the structure of the
leading infrared renormalon. We apply the method to the Gross-Llewellyn Smith
(GLS) sum rule. By confronting the obtained result with the experimentally
extracted GLS value, we determine the value of the QCD coupling parameter which
turns out to agree with the present world average.


title: The Diffractive Interactions Working Group Summary

abstract:
  Diffractive interactions represent a lively domain of investigations, as
confirmed by the progresses reported during the conference. We summarize the
diffractive interactions session and put the new experimental data (section 1),
developments in modeling diffraction (section 2) and the theoretical relations
with Quantum Chromodynamics (section 3) in perspective.


title: Bulk and brane anomalies in six dimensions

abstract:
  We study anomalies of six-dimensional gauge theories compactified on
orbifolds. In addition to the known bulk anomalies, brane anomalies appear on
orbifold fixpoints in the case of chiral boundary conditions. At a fixpoint,
where the bulk gauge group G is broken to a subgroup H, the non-abelian
G-anomaly in the bulk reduces to a H-anomaly which depends in a simple manner
on the chiral boundary conditions. We illustrate this mechanism by means of a
SO(10) GUT model.


title:
g factor in a light two body atomic system: a determination of
  fundamental constants to test QED

abstract:
  Energy levels of a two-body atomic system in an external homogeneous magnetic
field can be presented in terms of magnetic moments of their components,
however, those magnetic moments being related to bound particles differ from
their free values. Study of bound g factors in simple atomic systems are now of
interest because of a recent progress in experiments on medium Z ions and of a
new generation of muonium experiments possible with upcoming intensive muon
sources. We consider bound corrections to the g factors in several atomic
systems, experimental data for which are available in literature: hydrogen,
helium-3 ion, muonium, hydrogen-like ions with spinless nuclei with medium Z.


title:
Hadronic effects in leptonic systems: muonium hyperfine structure and
  anomalous magnetic moment of muon

abstract:
  Contributions of hadronic effects to the muonium physics and anomalous
magnetic moment of muon are considered. Special attention is paid to
higher-order effects and the uncertainty related to the hadronic contribution
to the hyperfine structure interval in the ground state of muonium.


title:
The effects of matter density uncertainties on neutrino oscillations in
  the Earth

abstract:
  We compare three different methods to evaluate uncertainties in the Earth's
matter density profile, which are relevant to long baseline experiments, such
as neutrino factories.


title:
A Unified Description of Quark and Lepton Mass Matrices in a Universal
  Seesaw Model

abstract:
  In the democratic universal seesaw model, the mass matrices are given by
\bar{f}_L m_L F_R + \bar{F}_L m_R f_R + \bar{F}_L M_F F_R (f: quarks and
leptons; F: hypothetical heavy fermions), m_L and m_R are universal for up- and
down-fermions, and M_F has a structure ({\bf 1}+ b_f X) (b_f is a
flavour-dependent parameter, and X is a democratic matrix). The model can
successfully explain the quark masses and CKM mixing parameters in terms of the
charged lepton masses by adjusting only one parameter, b_f. However, so far,
the model has not been able to give the observed bimaximal mixing for the
neutrino sector. In the present paper, we consider that M_F in the quark
sectors are still "fully" democratic, while M_F in the lepton sectors are
partially democratic. Then, the revised model can reasonably give a nearly
bimaximal mixing without spoiling the previous success in the quark sectors.


title: Solving Renormalization Group Equations by Recursion Relations

abstract:
  Renormalization Group Equations in integro-differential form describing the
evolution of cascades or resumming logarithmic scaling violations have been
known in quantum field theory for a long time. These equations have been
traditionally solved by turning to Mellin moments, since in this space they
become algebraic. x-space solutions are less known, but special asymptotic
expansions exists which allow a fast numerical implementation of these
equations. We illustrate how the equations can be solved using recursion
relations in the next-to-leading order approximation.


title: Testing CPT Invariance with Neutrinos

abstract:
  We investigate possible tests of CPT invariance on the level of event rates
at neutrino factories. We do not assume any specific model, but
phenomenological differences in the neutrino-antineutrino masses and mixing
angles in a Lorentz invariance preserving context, which could be induced by
physics beyond the Standard Model. We especially focus on the muon neutrino and
antineutrino disappearance channels in order to obtain constraints on the
neutrino-antineutrino mass and mixing angle differences. In a typical neutrino
factory setup simulation, we find, for example, that $|m_3 - \bar{m}_3|
\lesssim 1.9 \cdot 10^{-4} \mathrm{eV}$ and $|\theta_{23} -\bar \theta_{23}|
\lesssim 2^\circ$.


title:
The pion form factor at timelike momentum transfers in a dispersion
  approach

abstract:
  We consider a model with $\rho\pi\pi$, $\rho KK$, and gauge-invariant
$\rho\gamma$ couplings and obtain the pion form factor $F_\pi$ at timelike
momentum transfers by resummation of pion and kaon loops. We use a dispersion
representation for the loop diagrams and analyse ambiguities related to
subtraction constants. The resulting representation for $F_\pi$ is shown to
have the form of the conventional vector meson dominance formula with one
important distinction - the effective $\rho$-meson decay constant $f^{\rm
eff}_\rho$ turns out to depend on the momentum transfer. For the
electromagnetic pion form factor we include in addition the $\rho-\omega$
mixing effects. We apply the representations obtained to the analysis of the
data on the pion form factors from $e^+e^-$ annihilation and $\tau$ decay and
extract the $\rho^-$, $\rho^0$ and $\omega$ masses and coupling constants.


title:
Recent Results on Photoproduction of Vector Mesons and Mass Dependent
  Pomeron Trajectory

abstract:
  It is shown that the recent results on photoproduction of vector mesons can
be naturally explained by using a mass dependent pomeron trajectory.


title: Mixing and decays of rho- and omega-mesons

abstract:
  Isospin violating mixing of \rho- and \omega-mesons is reconsidered in terms
of propagators. Its influence on various pairs of (\rho^0,\omega)-decays to the
same final states is demonstrated. Some of them, (\rho^0,\omega)\to\pi^+\pi^-
and (\rho^0,\omega)\to\pi^0\gamma, have been earlier discussed in the
literature, others (e.g., (\rho^0,\omega)\to\eta\gamma and (\rho^0,\omega)\to
e^+e^-) are new in this context. Changes in partial widths for all the decay
pairs are shown to be correlated. The set of present experimental data, though
yet inconclusive, provides some limits for the direct (\rho\omega)-coupling and
indirectly supports enhancement of \rho^0\to\pi^0\gamma in comparison with
\rho^{\pm}\to\pi^{\pm}\gamma, though not so large as in some previous
estimates.


title: Renormalization group approach to soft gluon resummation

abstract:
  We present a simple proof of the all-order exponentiation of soft logarithmic
corrections to hard processes in perturbative QCD. Our argument is based on
proving that all large logs in the soft limit can be expressed in terms of a
single dimensionful variable, and then using the renormalization group to resum
them. Beyond the next-to-leading log level, our result is somewhat less
predictive than previous all-order resummation formulae, but it does not rely
on non-standard factorization, and it is thus possibly more general. We use our
result to settle issues of convergence of the resummed series, we discuss
scheme dependence at the resummed level, and we provide explicit resummed
expressions in various factorization schemes.


title:
Vertex Counting: Statistical Distribution of Vertices in Large Sets of
  Tree Diagrams

abstract:
  We study the problem of determining the distribution of vertices of a
particular given type in the set of all Feynman tree graphs in quantum field
theories. We show that in almost all cases a Gaussian distribution arises
asymptotically, and we compute the mean and variance of this distribution for
several theories. We show the distribution's `fine structure', arising from
topological sum rules, can be obtained.


title: Do LEP results suggest that quarks have integer electric charges?

abstract:
  We argue that recent results from two-photon processes at LEP are better
explained by quarks possessing integer electric charges.


title: Quark-Hadron Duality

abstract:
  Quark-hadron duality and its potential applications are discussed. We focus
on theoretical efforts to model duality.


title: Warped Supersymmetric Grand Unification

abstract:
  We construct a realistic theory of grand unification in AdS_5 truncated by
branes, in which the unified gauge symmetry is broken by boundary conditions
and the electroweak scale is generated by the AdS warp factor. We show that the
theory preserves the successful gauge coupling unification of the 4D MSSM at
leading-logarithmic level. Kaluza-Klein (KK) towers, including those of XY
gauge and colored Higgs multiplets, appear at the TeV scale, while the extra
dimension provides natural mechanisms for doublet-triplet splitting and proton
decay suppression. In one possible scenario supersymmetry is strongly broken on
the TeV brane, in which case the lightest SU(3)_C x SU(2)_L x U(1)_Y gauginos
are approximately Dirac and the mass of the lightest XY gaugino is pushed well
below that of the lowest gauge boson KK mode, improving the prospects for its
production at the LHC. The bulk Lagrangian possesses a symmetry that we call
GUT parity. If GUT parity is exact, the lightest GUT particle, most likely an
XY gaugino, is stable. Once produced in a collider, the XY gaugino hadronizes
to form mesons, some of which will be charged and visible as highly ionizing
tracks. The lightest supersymmetric particle is the gravitino of mass \sim
10^{-3} eV, which is also stable if R parity is conserved.


title: Factorization, Effective Field Theory, and B-> D^(*) X Decays

abstract:
  In this proceedings I review the soft-collinear effective theory (SCET), an
effective theory for energetic particles. I also discuss factorization in
exclusive and inclusive B-> D^(*)X decays, and tests which can help distinguish
whether factorization is a result of a large energy limit, the large N_c limit,
or a combination of the two.


title:
Leptogenesis and Neutrino Oscillations Within A Predictive
  G(224)/SO(10)-Framework

abstract:
  A framework based on an effective symmetry that is either G(224)= SU(2)_L x
SU(2)_R xSU(4)^c or SO(10) has been proposed (a few years ago) that
successfully describes the masses and mixings of all fermions including
neutrinos, with seven predictions, in good accord with the data. Baryogenesis
via leptogenesis is considered within this framework by allowing for natural
phases (~ 1/20-1/2) in the entries of the Dirac and Majorana mass-matrices. It
is shown that the framework leads quite naturally, for both thermal as well as
non-thermal leptogenesis, to the desired magnitude for the baryon asymmetry.
This result is obtained in full accord with the observed features of the
atmospheric and solar neutrino oscillations, as well as with those of the quark
and charged lepton masses and mixings, and the gravitino-constraint. Hereby one
obtains a unified description of fermion masses, neutrino oscillations and
baryogenesis (via leptogenesis) within a single predictive framework.


title: High-p_T Tomography of d+Au and Au+Au at SPS, RHIC, and LHC

abstract:
  The interplay of nuclear effects on the p_T > 2 GeV inclusive hadron spectra
in d+Au and Au+Au reactions at root(s) = 17, 200, 5500 GeV is compared to
leading order perturbative QCD calculations for elementary p+p (p-bar+p)
collisions. The competition between nuclear shadowing, Cronin effect, and jet
energy loss due to medium-induced gluon radiation is predicted to lead to a
striking energy dependence of the nuclear suppression/enhancement pattern in
A+A reactions. We show that future d+Au data can used to disentangle the
initial and final state effects.


title: Low Scale String Unification and the Highest Energy Cosmic Rays

abstract:
  String unification at a scale of a few tens of TeV explains the existence of
cosmic ray interactions beyond the Greisen-Zatsepin-Kuzmin (GZK) cutoff.
  Trans-GZK cosmic rays are neutrinos which can penetrate the cosmic microwave
background. In interactions with atmospheric nuclei they have sufficient energy
for exciting string modes. We present a model for the description of such
interactions and discuss the properties of the resulting extensive air showers.
Presently available data on trans-GZK cosmic rays suggest a string scale around
80 TeV.


title: Precision Tests of the Electroweak Interactions at LEP/SLC

abstract:
  This paper is an updated version of the invited plenary talk given at the
XXII Physics in Collision Conference at Stanford, (June 2002). The measurements
performed at LEP and SLC have substantially improved the precision of the tests
of the Minimal Standard Model. The precision is such that there is sensitivity
to pure weak radiative corrections. This allows to indirectly determine the top
mass (\mt=178$\pm$10 GeV), the W-boson mass (\MW=80.368$\pm$0.022 GeV), and to
set an upper limit on the Higgs boson mass of 193 GeV at 95% confidence level.


title: Evidence for Factorization in Three-body B --> D(*) K- K0 Decays

abstract:
  Motivated by recent experimental results, we use a factorization approach to
study the three-body B --> D(*) K- K0 decay modes. Two mechanisms are proposed
for kaon pair production: current-produced (from vacuum) and transition (from B
meson). The Bbar0 --> D(*)+ K- K0 decay is governed solely by the
current-produced mechanism. As the kaon pair can be produced only by the vector
current, the matrix element can be extracted from e+ e- --> K Kbar processes
via isospin relations. The decay rates obtained this way are in good agreement
with experiment. Both current-produced and transition processes contribute to
B- --> D(*)0 K- K0 decays. By using QCD counting rules and the measured B- -->
D(*)0 K- K0 decay rates, the measured decay spectra can be understood.


title:
QCD effects to Bjorken unpolarized sum rule for $\nu N$ deep-inelastic
  scattering

abstract:
  The possibility of the first measurement of Bjorken unpolarized sum rule for
$F_1$ structure function of $\nu N$ deep-inelastic scattering at Neutrino
Factories is commented. The brief summary of various theoretical contributions
to this sum rule is given. Using the next-to-leading set of parton
distributions functions, we simulate the expected $Q^2$-behavior and emphasize
that its measurement can allow to determine the value of the QCD strong
coupling constant $\alpha_s$ with reasonable theoretical uncertainty, dominated
by the ambiguity in the existing estimates of the twist-4 non-perturbative
$1/Q^2$-effect.


title: QCD Sum Rules - a Working Tool for Hadronic Physics

abstract:
  QCD sum rules are overviewed with an emphasize on the practical applications
of this method to the physics of light and heavy hadrons.


title: Topics in Hadronic Physics

abstract:
  This work is a pedagogical introduction to the Lund string fragmentation
model and the Feynman-Field hadron production model. Derivations of important
formulas are worked out in details whenever possible. An example is given to
show how to evaluate the invariant meson production cross section using the
Monte Carlo integration technique.


title: The crystallography of color superconductivity

abstract:
  We describe the crystalline phase of color superconducting quark matter. This
phase may occur in quark matter at densities relevant for compact star physics,
with possible implications for glitch phenomena in pulsars. We use a
Ginzburg-Landau approach to determine that the crystal has a
face-centered-cubic (FCC) structure. Moreover, our results indicate that the
phase is robust, with gaps, critical temperature, and free energy comparable to
those of the color-flavor-locked (CFL) phase. Our calculations also predict
``crystalline superfluidity'' in ultracold gases of fermionic atoms.


title: CP Violation in Bilarge Lepton Mixing

abstract:
  We propose a scheme of lepton mixing in which the unitary matrix that
diagonalizes the neutrino mass matrix is bimaximal and the deviation from
bimaximal of the lepton mixing matrix is due to the unitary matrix that
diagonalizes the charged-lepton mass matrix. This matrix is assumed to be
hierarchical, like the quark mixing matrix. It is shown that in general it is
possible to have a sizable value for |U_{e3}| together with an effective
two-neutrino maximal mixing in solar neutrino experiments. If the effective
mixing in solar neutrino experiments is less than maximal, as indicated by
current data, |U_{e3}| is bounded from below. Furthermore, in general the
violation of CP could be relatively large.


title: Theoretical Expectations for Rare and Forbidden Tau Decays

abstract:
  Given the experimental evidence for $\nu_\mu - \nu_\tau$ oscillations, the
existence of lepton flavor violation in $\tau$ decays is a theoretical
certainty. In this brief review, I consider the connection between models of
neutrino mass and the expected observability of some $\tau$ decays.


title: Discussion session on diffractive Higgs production

abstract:
  This note summarizes the discussion session on diffractive Higgs production
at the DIS2002 workshop.


title: Charm and Bottom Baryon Masses in the 1/N Expansion

abstract:
  The masses of heavy quark baryons are studied in an expansion in 1/N_c, SU(3)
flavor symmetry breaking, and heavy-quark symmetry breaking. Very accurate
model-independent mass relations are obtained for charm and bottom baryons.


title: Lifting a Realistic SO(10) Grand Unified Model to Five Dimensions

abstract:
  It has been shown recently that the problem of rapid proton decay induced by
dimension five operators arising from the exchange of colored Higgsinos can be
simply avoided in grand unified models where a fifth spatial dimension is
compactified on an orbifold. Here we demonstrate that this idea can be used to
solve the Higgsino-mediated proton decay problem in any realistic SO(10) model
by lifting that model to five dimensions. A particular SO(10) model that has
been proposed to explain the pattern of quark and lepton masses and mixings is
used as an example. The idea is to break the SO(10) down to the Pati-Salam
symmetry by the orbifold boundary conditions. The entire four-dimensional
SO(10) model is placed on the physical SO(10) brane except for the gauge
fields, the 45 and a single 10 of Higgs fields, which are placed in the
five-dimensional bulk. The structure of the Higgs superpotential can be
somewhat simplified in doing so, while the Yukawa superpotential and mass
matrices derived from it remain essentially unaltered.


title: Negative Parity 70-plet Baryon Masses in the 1/Nc Expansion

abstract:
  The masses of the negative parity SU(6) 70-plet baryons are analyzed in the
1/Nc expansion to order 1/Nc and to first order in SU(3) breaking. At this
level of precision there are twenty predictions. Among them there are the well
known Gell-Mann Okubo and equal spacing relations, and four new relations
involving SU(3) breaking splittings in different SU(3) multiplets. Although the
breaking of SU(6) symmetry occurs at zeroth order in 1/Nc, it turns out to be
small. The dominant source of the breaking is the hyperfine interaction which
is of order 1/Nc. The spin-orbit interaction, of zeroth order in 1/Nc, is
entirely fixed by the splitting between the singlet states Lambda(1405) and
Lambda(1520), and the spin-orbit puzzle is solved by the presence of other
zeroth order operators involving flavor exchange.


title:
Less suppressed mu-e-gamma and tau-mu-gamma loop amplitudes and extra
  dimension theories

abstract:
  When mu-e-gamma (or tau-mu-gamma) loop involves a vector boson, the amplitude
is suppressed by more than two powers of heavy particle masses. However we show
that the scalar boson loop diagrams are much less damped. Particularly, the
loop amplitude in which the intermediate fermion and scalar boson have
comparable masses is as large as possible, as allowed by the decoupling
theorem. Such a situation is realized in the "universal extra dimension
theory", and can yield a large enough rate to be detectable in current
experiments. Our investigation involves precise calculation of the scalar boson
loop's dependence on the masses of the intermediate states.


title:
Resonant emergence of global and local spatiotemporal order in a
  nonlinear field model

abstract:
  We investigate the nonequilibrium evolution of a scalar field in (2+1)
dimensions. The field is set in a double-well potential in contact (open) or
not (closed) with a heat bath. For closed systems, we observe the synchronized
emergence of coherent spatiotemporal configurations, identified with oscillons.
This initial global ordering degenerates into localized order until all
oscillons disappear. We show that the synchronization is driven by resonant
parametric oscillations of the field's zero mode and that local ordering is
only possible outside equipartition. None of these orderings occur for open
systems.

categories: hep-ph cond-mat.stat-mech nlin.PS physics.comp-ph


title: Analytical Evaluation of Double Boxes

abstract:
  Recent results on the analytical evaluation of double-box Feynman integrals
and the corresponding methods of evaluation are briefly reviewed.


title: Generalized parton distributions for $q\bar{q}$ pions

abstract:
  We use a two-body, light-cone pion wave function (which vanishes when one of
the constituents carries all of the plus-momentum) to construct a double
distribution. We show that the resulting generalized parton distribution has
incorrect behavior at the crossover between kinematic regions. Furthermore the
positivity constraints are not respected. On the other hand, the
field-theoretic, two-body double distribution gives generalized parton
distributions that have physically correct crossover behavior and respect the
positivity constraints independent of the model wave function used. However,
the sum rule and polynomiality conditions cannot be satisfied with a two-body
wave function alone since Lorentz symmetry is not maintained.


title:
Impact Parameter Dependent Parton Distributions and Transverse Single
  Spin Asymmetries

abstract:
  Generalized parton distributions (GPDs) with purely transverse momentum
transfer can be interpreted as Fourier transforms of the distribution of
partons in impact parameter space. The helicity-flip GPD $E(x,0,-\Dps)$ is
related to the distortion of parton distribution functions in impact parameter
space if the target is not a helicity eigenstate, but has some transverse
polarization. This transverse distortion can be used to develop an intuitive
explanation for various transverse single spin asymmetries.


title: Models of inflation liberated by the curvaton hypothesis

abstract:
  It is usually supposed that inflation is of the slow-roll variety, and that
the inflaton generates the primordial curvature perturbation. According to the
curvaton hypothesis, inflation need not be slow-roll, and if it is the inflaton
generates a negligible curvature perturbation. We find that the construction of
slow-roll inflation models becomes much easier under this hypothesis. Also,
thermal inflation followed by fast-roll becomes viable, with no slow-roll
inflation at all.


title:
Limits of Confinement: The First 15 Years of Ultra-Relativistic Heavy
  Ion Studies

abstract:
  The study of high energy nuclear collisions has entered a new stage with
RHIC; it therefore seems a good time to ask what we have learned from the
experimental results obtained up to now. I recall what we had expected to find
when the SPS and AGS programs were started, summarize what actually was found,
and then try to assess what we have learned from the results.


title: Including virtual photons in strong interactions

abstract:
  In the perturbative field-theoretical models we investigate the inclusion of
the electromagnetic interactions into the purely strong theory that describes
hadronic processes. In particular, we study the convention for splitting
electromagnetic and strong interactions and the ambiguity of such a splitting.
The issue of the interpretation of the parameters of the low-energy effective
field theory in the presence of electromagnetic interactions is addressed, as
well as the scale and gauge dependence of the effective theory couplings. We
hope, that the results of these studies are relevant for the electromagnetic
sector of ChPT.


title:
Two comments to utilization of structure function approach in DIS
  experiments

abstract:
  The "returning to resonance" mechanism can be used to obtain the simple
procedure of taking RC to DIS cross section into account, in frames of
Drell-Yan picture. Iteration procedure is proposed.
  Kinematic region $y \to 1$ can be described in frames of Drell-Yan picture
using structure function approach. The large RC in the lowest order reflect
Sudakov form factor suppression, which can be taken into account in all orders
of perturbation theory. Basing on explicit calculation in two lowest orders of
perturbation theory we construct the cross section in $y \to 1$ region obeying
renormalization group equations and include the Sudakov-like form factor
suppression.


title: Stability of strange quark matter: model dependence

abstract:
  The minimum energy per baryon number of strange quark matter is studied, as a
function of the strangeness fraction, in the MIT bag model and in two different
versions of the Color Dielectric Model: a comparison is made with the hyperon
masses having the same strangeness fraction, and coherently calculated within
both models. Calculations are carried out in mean field approximation, with one
gluon exchange corrections. The results allow to discuss the model dependence
of the stability of strangelets: they can be stable in the MIT bag model and in
the double minimum version of the Color Dielectric Model, while the single
minimum version of the Color Dielectric Model excludes this possibility.


title:
Electroweak and finite width corrections to top quark decays into
  transverse and longitudinal $ W $-bosons

abstract:
  We calculate the electroweak and finite width corrections to the decay of an
unpolarized top quark into a bottom quark and a $ W $-gauge boson where the
helicities of the $ W $ are specified as longitudinal, transverse-plus and
transverse-minus. Together with the $ O(\alpha_s) $ corrections these
corrections may become relevant for the determination of the mass of the top
quark through angular decay measurements.


title: Hadronic Collisions in the Linked Dipole Chain Model

abstract:
  We apply the Linked Dipole Chain model to hadronic collisions using a
modified version of the LDCMC Monte Carlo program. In particular we investigate
the effects of multiple scatterings, which in this framework are reformulated
in terms of the production of multiple chains of dipoles. We find, among other
things, that this way of describing multiple scatterings is less sensitive to
the treatment of soft, non-perturbative, scatterings. Although the results
presented here are only at parton level, by comparing with corresponding
results from PYTHIA, we are confident that our model will be able to describe
essential features of high energy hadronic collisions, including underlying
events and jet-pedestal effects in high pT events. The model should also be
applicable to estimates of transverse energy flow in high energy heavy ion
collisions, of interest in analyses of signals for quark-gluon plasma
formation.


title: The SM prediction of g-2 of the muon

abstract:
  We calculate (g-2)/2 of the muon, by improving the determination of the
hadronic vacuum polarisation contribution, a_mu^{had,LO}, and its
uncertainties. The different e+e- data sets for each exclusive (and the
inclusive) channel are combined in order to obtain the optimum estimate of the
cross sections and their uncertainties. QCD sum rules are evaluated in order to
resolve an apparent discrepancy between the inclusive data and the sum of the
exclusive channels. We conclude a_mu^{had,LO}=(683.1 +- 5.9_{exp} +- 2.0_{rad})
10^{-10} which, when combined with the other contributions to (g-2)/2, is about
3 sigma below the present world average measurement.


title: The CKM Paradigm: Implications of the Most Recent Results

abstract:
  The implications of the most recent experimental results in the B and K meson
systems on the CKM paradigm are investigated by means of a global fit to the
theoretical predictions of the Standard Model. We advocate the frequentist
approach Rfit, which is implemented in the CKMFitter package. Within this
approach, constraints on the CKM parameters and other quantities of interest
are obtained, and extensions of the Standard Model are investigated.


title: Charmonium Production in $e^+e^-$ Annihilation at $\sqrt{s}=10.6GeV$

abstract:
  We review the charmonium production in $e^+e^-$ annihilation at
$\sqrt{s}=10.6GeV$. NRQCD predictions for the $J/\psi$ production are compared
with the recent measurements by BaBar and Belle. A NRQCD calculation for the
$D$-wave charmonium production is reported to further test the color-octet
mechanism and detect the $J^{PC}=2^{--}$ state. The issue of double $c \bar c$
production in $e^+e^-$ annihilation observed by Belle is also discussed.


title: Pressure of Hot QCD at Large N_f

abstract:
  We compute the pressure and entropy of hot QCD in the limit of large number
of fermions, N_f >> N_c ~ 1, to next to leading order in N_f. At this order the
calculation can be done exactly, up to ambiguities due to the presence of a
Landau pole in the theory; the ambiguities are O(T^8/\Lambda^4_{Landau}) and
remain negligible long after the perturbative series (in g^2 N_f) has broken
down. Our results can be used to test several proposed resummation schemes for
the pressure of full QCD.


title:
$B \to K^* \ell^+ \ell^-\big (\rho \ell \nu_{\ell}\big)$ helicity
  analysis in the LEET

abstract:
  We calculate the independent helicity amplitudes in the decays $B \to K^*
\ell^+ \ell^-$ and $B \to \rho \ell \nu_\ell$ in the so-called
Large-Energy-Effective-Theory (LEET). Taking into account the dominant
$O(\alpha_s)$ and SU(3) symmetry-breaking effects, we calculate various single
(and total) distributions in these decays making use of the presently available
data and decay form factors calculated in the QCD sum rule approach.
Differential decay rates in the dilepton invariant mass and the
Forward-Backward asymmetry in $B \to K^* \ell^+ \ell^-$ are worked out.
Measurements of the ratios $R_i(s) \equiv d \Gamma_{H_i}(s)(B \to K^* \ell^+
\ell^-)/ d \Gamma_{H_i}(s)(B \to \rho \ell \nu_\ell)$, involving the helicity
amplitudes $H_i(s)$, $i=0,+1, -1$, as precision tests of the standard model in
semileptonic rare B-decays are emphasized. We argue that $R_0(s)$ and
$R_{-}(s)$ can be used to determine the CKM ratio $| V_{ub}|/| V_{ts} |$ and
search for new physics, where the later is illustrated by supersymmetry.


title:
Solar neutrino oscillations and bounds on neutrino magnetic moment and
  solar magnetic field

abstract:
  If the observed deficit of solar neutrinos is due to neutrino oscillations,
neutrino conversions caused by the interaction of their transition magnetic
moments with the solar magnetic field (spin-flavour precession) can still be
present at a subdominant level. In that case, the combined action of neutrino
oscillations and spin-flavour precession can lead to a small but observable
flux of electron antineutrinos coming from the sun. Non-observation of these
nuebar's could set limits on neutrino transition moment \mu and the strength
and coordinate dependence of the solar magnetic field B_\perp. The sensitivity
of the nuebar flux to the product \mu B_\perp is strongest in the case of the
vacuum oscillation (VO) solution of the solar neutrino problem; in the case of
the LOW solution, it is weaker, and it is the weakest for the LMA solution. For
different solutions, different characteristics of the solar magnetic field
B_\perp(r) are probed: for the VO solution, the nuebar flux is determined by
the integral of B_\perp(r) over the solar convective zone, for LMA it is
determined by the magnitude of B_\perp in the neutrino production region, and
for LOW it depends on the competition between this magnitude and the derivative
of B_\perp(r) at the surface of the sun.


title:
The Leading Power Regge Asymptotic Behaviour of Dimensionally
  Regularized Massless On-Shell Planar Triple Box

abstract:
  The leading power asymptotic behaviour of the dimensionally regularized
massless on-shell planar triple box diagram in the Regge limit t/s -> 0 is
analytically evaluated.


title: Measuring the Weak Phase gamma in Color Allowed B->DKpi Decays

abstract:
  We present a method to measure the weak phase gamma in the three-body decay
of charged B mesons to the final states D K pi0. These decays are mediated by
interfering amplitudes which are color-allowed and hence relatively large. As a
result, large CP violation effects that could be observed with high statistical
significance are possible. In addition, the three-body decay helps resolve
discrete ambiguities that are usually present in measurements of the weak
phase. The experimental implications of conducting these measurements with
three-body decays are discussed, and the sensitivity of the method is evaluated
using a simulation.


title: Atmospheric Neutrino Fluxes

abstract:
  This talk is a status report on calculations of the flux of atmospheric
neutrinos from the sub-GeV range to E_\nu ~ PeV. In the lower energy range
(E_\nu < 1 TeV) the primary interest is in using the atmospheric neutrino beam
to study neutrino oscillations. In the TeV range and above, atmospheric
neutrinos are a calibration source and background for neutrino telescopes.


title: Neutrino-electron processes in a dense magnetized plasma

abstract:
  The neutrino-electron scattering in a dense degenerate magnetized plasma
under the conditions $\mu^2 > 2eB \gg \mu E$ is investigated.
  The volume density of the neutrino energy and momentum losses due to this
process are calculated. The results we have obtained demonstrate that plasma in
the presence of an external magnetic field is more transparent for neutrino
than non-magnetized plasma. It is shown that neutrino scattering under
conditions considered does not lead to the neutrino force acting on plasma.


title: J/psi suppression in heavy ion collisions by quark momentum diffusion

abstract:
  The momentum diffusion effect of the quark pair due to the multiple
scattering in a nuclear medium is studied to explain the observed J/psi yields
in SPS experiments. The resulting suppression is found to be insufficient to
reproduce the J/psi yield in Pb-Pb collisions at SPS energy.


title: The Nexus Model

abstract:
  The interpretation of experimental results at RHIC and in the future also at
LHC requires very reliable and realistic models.
  Considerable effort has been devoted to the development of such models during
the past decade, many of them being heavily used in order to analyze data.
There are, however, serious inconsistencies in the above-mentioned approaches.
  In this paper, we will introduce a fully self-consistent formulation of the
multiple-scattering scheme in the framework of a Gribov-Regge type effective
theory.


title: Baryon Number Violation and String Hadronization

abstract:
  In supersymmetric scenarios with broken R-parity, baryon number violating
sparticle decays are possible. We report on the development of a framework
allowing detailed studies with special attention given to the hadronization
phase. In our model, implemented in the Pythia event generator, the baryon
number violating vertex is associated with the appearance of a junction in the
colour confinement field. This allows us to tell where to look for the extra
(anti)baryon directly associated with the baryon number violating decay.


title:
Modified Paschos-Wolfenstein relation and extraction of weak mixing
  angle sin^2 theta_W

abstract:
  The NuTeV collaboration reported anomalously large weak mixing angle sin^2
theta_W in comparison with the standard model prediction. Neutrino and
antineutrino charged- and neutral-current events are analyzed for extracting
sin^2 theta_W. Although the Paschos-Wolfenstein relation is not directly used
in the analysis, it plays an important role in the determination. Noting that
the target nucleus, iron, is not an isoscalar nucleus, we derive a
leading-order expression for a modified Paschos-Wolfenstein relation for
nuclei, which may have neutron excess. Then, using charge and baryon-number
conservations for nuclei, we discuss a nuclear correction in the sin^2 theta_W
determination. It is noteworthy that nuclear modifications are different
between valence up- and down-quark distributions. We show this difference
effect on the NuTeV sin^2 theta_W deviation.


title: On QCD Predictions for the Chiral Lagrangian Coefficients

abstract:
  Based on a previous study of deriving the chiral Lagrangian (CL) from QCD, we
illustrate the main feature of QCD predictions for the CL coefficients (CLC) in
certain approximations. We first show that, in the large-N(c) limit, the
anomaly part contributions to the CLC are exactly cancelled by certain terms in
the normal part contributions (NPC), so that the final results only concern the
remaining NPC depending on QCD interactions. We then do the calculation in a
simple approach with further approximations. The obtained CLC and quark
condensate are consistent with the experiments.


title:
Top quark pair production and decay at hadron colliders: Predictions at
  NLO QCD including spin correlations

abstract:
  We present results at NLO QCD for hadronic production and decay of top quark
pairs, taking into account t tbar spin correlations.


title: Distinguishing among Scalar Field Models of Dark Energy

abstract:
  We show that various scalar field models of dark energy predict degenerate
luminosity distance history of the Universe and thus cannot be distinguished by
supernovae measurements alone. In particular, models with a vanishing
cosmological constant (the value of the potential at its minimum) are
degenerate with models with a positive or negative cosmological constant whose
magnitude can be as large as the critical density. Adding information from CMB
anisotropy measurements does reduce the degeneracy somewhat but not
significantly. Our results indicate that a theoretical prior on the preferred
form of the potential and the field's initial conditions may allow to
quantitatively estimate model parameters from data. Without such a theoretical
prior only limited qualitative information on the form and parameters of the
potential can be extracted even from very accurate data.


title: Soft-Gluon Resummation for Bottom Fragmentation in Top Quark Decay

abstract:
  We study soft-gluon radiation in top quark decay within the framework of
perturbative fragmentation functions. We present results for the b-quark energy
distribution, accounting for soft-gluon resummation in both the MSbar
coefficient function and in the initial condition of the perturbative
fragmentation function. The results show remarkable improvement and the b-quark
energy spectrum in top quark decay exhibits very little dependence on
factorization and renormalization scales. We present some hadron-level results
in both x_B and moment space by including non-perturbative information
determined from e+e- data.


title:
The (gamma gamma -> H^0 H^0) process in noncommutative quantum
  electrodynamics

abstract:
  We study the possibility of detecting noncommutative QED through neutral
Higgs boson pair production at (gamma--gamma) collider. This is based on the
assumption that H^0 interacts directly with photon as suggested by symmetry
considerations. The sensitivity of the cross-section to the noncommutative
scale (Lambda_{NC}) and Higgs mass is investigated.


title: Analytic Amplitudes for Hadronic Forward Scattering : COMPETE Update

abstract:
  We consider several classes of analytic parametrizations of hadronic
scattering amplitudes, and compare their predictions to all available forward
data in hadron-hadron, gamma-p and gamma-gamma reactions. Although these
parametrizations are very close for SQRTs larger than 9 GeV, it turns out that
they differ markedly at low energy, where a universal Pomeron term like ln**2 s
enables one to extend the fit down to SQRTs equal to 4 GeV. We present
predictions on the total cross sections and on the ratio of the real part to
the imaginary part of the elastic amplitude (RHO parameter) for present and
future pp and antipp colliders, and on total cross sections for gamma-p into
hadrons at cosmic-ray energies and for gamma-gamma into hadrons up to SQRTs
equal to 1 TeV.


title:
Higgs-Mediated $B_{s,d}^0\to\mu\tau, e\tau$ and $\tau\to3\mu, e\mu\mu$
  Decays in Supersymmetric Seesaw Models

abstract:
  We study the rates allowed for the Higgs-mediated decays
$B_{s,d}^0\to\mu\tau, e\tau$ and $\tau\to \mu\mu\mu, e\mu\mu$ in supersymmetric
seesaw models, assuming that the only source of lepton flavour violation (LFV)
is the renormalization of soft supersymmetry-breaking terms due to off-diagonal
singlet-neutrino Yukawa interactions. These decays are strongly correlated
with, and constrained by, the branching ratios for $B_{s,d}^0\to\mu\mu$ and
$\tau\to \mu(e)\gamma.$ Parametrizing the singlet-neutrino Yukawa couplings
$Y_\nu$ and masses $M_{N_i}$ in terms of low-energy neutrino data, and allowing
the flavour-universal soft masses for sleptons and for squarks, as well as
those for the two Higgs doublets, to be different at the unification scale, we
scan systematically over the model parameter space. Neutrino data and the
present experimental constraints set upper limits on the Higgs-mediated LFV
decay rates $Br(B_{s}^0\to\mu\tau, e\tau)\lsim 4\times 10^{-9}$ and
$Br(\tau\to\mu\mu\mu, e\mu\mu)\lsim 4\times 10^{-10}$.


title:
Determination of weak phases $\phi_2$ and $\phi_3$ from $B\to
  \pi\pi,K\pi$ in the pQCD method

abstract:
  We look at two methods to determine the weak phases $\phi_2$ and $\phi_3$
from $B \to \pi\pi$ and $K\pi$ decays within the perturbative QCD approach. We
obtain quite interesting bounds on $\phi_2$ and $\phi_3$ from experimental
measurements in asymmetric B-factory: $55^o \leq \phi_2 \leq 100^o$ and $51^o
\leq \phi_3 \leq 129^o$. Specially we predict the possibility of large direct
CP violation effect in $B^0 \to \pi^{+}\pi^{-}$ decay with $A_{cp}^{dir}(B\to
\pi^{+} \pi^{-})=(23\pm7)$ %.


title: HERWIG: an event generator for $e^+e^-$ Linear Colliders

abstract:
  I review all the new features of the HERWIG event generator which are
relevant to Linear Collider (LC) physics starting from version 6.1


title:
Detection of heavy charged Higgs bosons at future Linear Colliders via
  $\tau^-\bar\nu_\tau H^+$ production

abstract:
  We show how a statistically significant signal of heavy charged Higgs bosons
of a Type II Two-Higgs Doublet (2HDM) Model produced in association with
tau-neutrino pairs can be established at future $e^+e^-$ Linear Colliders (LCs)
in the $H^+\to t\bar b\to 4$ jet decay channel for large $\tan\beta$ in the
$M_{H^\pm}\gsim \sqrt s/2$ mass region


title: Subleading corrections to the V_ub determination from exclusive B decays

abstract:
  It has been proposed to determine the CKM matrix element |V_ub| in a
model-independent way from a combination of rare and semileptonic B and D
decays near the zero recoil point. An essential ingredient in such a
determination is a heavy quark symmetry relation connecting the form-factors
appearing in B -> K* e+e- to semileptonic form factors relevant for B -> rho
e\nu. We estimate the leading corrections to this symmetry relation, of order
\alpha_s(m_b) and \Lambda/m_b, pointing out that they can be as large as 20%,
depending on the value of the matrix element of a dimension-4 operator.
Dimensional analysis estimates of this matrix element give a corresponding
uncertainty in |V_ub| of the order of a few percent.


title: Structure of radiative interferences and g=2 for vector mesons

abstract:
  The result by Burnett-Kroll (BK) states that for radiative decays the
interference of ${\cal O}(\omega^{-1})$ in the photon energy $\omega$, vanishes
after sum over polarizations of the involved particles. Using radiative decays
of vector mesons we show that if the vector meson is polarized the ${\cal
O}(\omega^{-1})$ terms are null only for the canonical value of the magnetic
dipole moment of the vector meson, namely ${\bf g}=2$ in Bohr's magneton units.
A subtle cancellation of all ${\cal O}(\omega^{-1})$ terms happens when summing
over all polarizations to recover the Burnett-Kroll result. We also show the
source of these terms and the corresponding cancellation for the unpolarized
case and exhibit a global structure that can make them individually vanish in a
particular kinematical region.


title: Hyperon scalar form factors

abstract:
  We evaluate the long range part of the hyperon form factors and their
contribution to elastic pion-hyperon scattering.


title: Kaluza-Klein modes in hybrid inflation

abstract:
  When one constructs specific models with the fundamental scale as low as the
TeV scale, there arise many difficulties. In this paper we examine the hybrid
inflation due to bulk scalar fields, which has been proposed to solve the
problem of fine-tuning in producing density perturbations. We find that the
Kaluza-Klein modes play significant roles, which enhance the speed of the phase
transition and alter the reheating process. We also argue that a lower bound
must be put to the fundamental scale, in order to construct the successful
hybrid inflation due to the bulk scalar fields.


title: Quark masses from quark-gluon condensates in a modified perturbative QCD

abstract:
  In this note, it is argued that the mass matrix for the six quarks can be
generated in first approximation by introducing fermion condensates on the same
lines as was done before for gluons, within the modified perturbative expansion
for QCD proposed in former works. Thus, the results point in the direction of
the conjectured link of the approximate `Democratic' symmetry of the quark mass
matrix and `gap' effects similar to the ones occuring in superconductivity. The
condensates are introduced here non-dynamically and therefore the question of
the possibility for their spontaneous generation remains open. However,
possible ways out of the predicted lack of the `Democratic' symmetry of the
condensates resulting from the spontaneous breaking of the flavour symmetry are
suggested. They come from an analysis based on the Cornwall--Jackiw--Tomboulis
(CJT) effective potential for composite operators


title:
Factorization, the light-cone distribution amplitude of the B-meson and
  the radiative decay B -> gamma l nu_l

abstract:
  We study the radiative decay B -> gamma l nu_l in the framework of QCD
factorization. We demonstrate explicitly that, in the heavy-quark limit and at
one-loop order in perturbation theory, the amplitude does factorize, i.e. that
it can be written as a convolution of a perturbatively calculable
hard-scattering amplitude with the (non-perturbative) light-cone distribution
amplitude of the B-meson. We evaluate the hard-scattering amplitude at one-loop
order and verify that the large logarithms are those expected from a study of
the b->u transition in the Soft-Collinear Effective Theory. Assuming that this
is also the case at higher orders, we resum the large logarithms and perform an
exploratory phenomenological analysis. The questions addressed in this study
are also relevant for the applications of the QCD factorization formalism to
two-body non-leptonic B-decays, in particular to the component of the amplitude
arising from hard spectator interactions.


title: Gauge Coupling Unification in GUT with Anomalous U(1) Symmetry

abstract:
  We show that in the framework of grand unified theory (GUT) with anomalous
$U(1)_A$ gauge symmetry, the success of the gauge coupling unification in the
minimal SU(5) GUT is naturally explained, even if the mass spectrum of
superheavy fields does not respect SU(5) symmetry. Because the unification
scale for most realizations of the theory becomes smaller than the usual GUT
scale, it suggests that the present level of experiments is close to that
sufficient to observe proton decay via dimension 6 operators, $p\to e+\pi$.


title:
Constraints on Neutrino Parameters by Neutrinoless Double Beta Decay
  Experiments

abstract:
  Allowed regions on the m_l - cos{2\theta_{12}} plane are extracted from
results of neutrinoless double beta decay experiments. It is shown that 0.05 eV
(0 eV) < m_l < 1.85 eV is obtained for the normal (inverted) hierarchy by using
the LMA best fit parameters and the 0\nu\beta\beta result announced late last
year, which is 0.05 eV < <m>_\beta\beta < 0.84 eV with +/- 50% uncertainty of
the nuclear matrix elements.


title: All-Purpose Numerical Evaluation of One-Loop Multi-Leg Feynman Diagrams

abstract:
  A detailed investigation is presented of a set of algorithms which form the
basis for a fast and reliable numerical integration of one-loop multi-leg (up
to six) Feynman diagrams, with special attention to the behavior around
(possibly) singular points in phase space. No particular restriction is imposed
on kinematics, and complex masses (poles) are allowed.


title: On charmonia and charmed mesons photoproduction at high energy

abstract:
  We compare the predictions of the collinear parton model and the
k_T-factorization approach in J\Psi and D^\star meson photoproduction at HERA
energies. It is shown that obtained in the both approaches D^\star meson
spectra over p_T and \eta as well as J\Psi meson p_T- and z-spectra are very
different. The predictions obtained in the k_T-factorization approach are agree
with the experimental data well. We also predict the nontrivial p_T-dependence
of the the spin parameter $\alpha(p_T) in the J\Psi photoproduction.


title: Evolving QCD

abstract:
  We give an overview of the current theoretical status of proper time
renormalization group flow equations applied to QCD. These equations give the
evolution of coupling constants in an effective QCD Lagrangian as a function of
an infra-red cut-off parameter. This parameter characterizes the resolution
with which the system is looked at. Decreasing resolution transforms partonic
quarks into constituent quarks and generates pion bound states. The evolution
equations can also be applied to finite temperature and finite density QCD.


title: SNO and the solar neutrino problem

abstract:
  We study the implication of the first neutral current (NC) data from SNO. We
perform model independent and model dependent analyses of the solar neutrino
data. The inclusion of the first SNO NC data in the model independent analysis
determines the allowed ranges of $^{8}{B}$ flux normalization and the $\nu_e$
survival probability more precisely than what was possible from the SK and SNO
CC combination. Transitions to pure sterile states are seen to be hugely
disfavored however transition to ``mixed'' states are still viable with a
probability of finding about 30% sterile component in the resultant beam at
$1\sigma$. We perform global $\nu_e-\nu_{active}$ oscillation analyses of solar
neutrino data including the recent SNO results. LMA emerges as a huge favorite
while LOW appears at the $3\sigma$ level. All the other solutions are
disfavored at $3\sigma$ while SMA is virtually ruled out. Maximal mixing is
disfavored at $3\sigma$. We explore in some details the reasons for the
incompatibility of the maximal mixing solution and the LOW solution with the
global solar neutrino data.


title: On the scalar nonet lowest in mass

abstract:
  The hypothesis that there exists a nonet of scalars mainly composed of a
valence quark-antiquark pair and mixed according to near singlet-octet
separation : f_0 (980) singlet, a_0^{+,0,-} (980), K^{* +,0}_0 (1430), \bar
K^{* -,0}_0 (1430), f_0 (1500) octet, is put to further tests from the three
body decays D^{\pm}, D_{s}^{\pm} -> PS^{\pm} pi^+ pi^- with PS^{\pm} =
pi^{\pm}, K^{\pm}. The analysis of decay phases supports the singlet nature of
f_0 (980).


title: Vector form factor of the pion : A model-independent approach

abstract:
  We study a model-independent parameterization of the vector pion form factor
that arises from the constraints of analyticity and unitarity. Our description
should be suitable up to s^(1/2) ~ 1.2 GeV and allows a model-independent
determination of the mass of the rho(770) resonance. We analyse the
experimental data on tau^- -> pion^- pion^0 nu_tau and e^+ e^- -> pion^+ pion^-
in this framework, and its consequences on the low-energy observables worked
out by chiral perturbation theory. An evaluation of the two pion contribution
to the anomalous magnetic moment of the muon, a_{mu}, and to the fine structure
constant, alpha(M_Z^2), is also performed.


title: The glueball among the light scalar mesons

abstract:
  In our phenomenological analysis of the spectroscopy of light scalar mesons
we do not find compelling evidence for the existence of the low mass
\kappa(900) or \sigma(600) states nor for f_0(1370) as single resonance. If the
f_0(980) and and f_0(1500) are taken as members of the q qbar nonet there
remains a broad object formed by f_0(400-1200) and f_0(1370) which is a
glueball candidate gb(1000).


title: The pionic beta decay in chiral perturbation theory

abstract:
  Within the framework of chiral perturbation theory with virtual photons and
leptons, we present an updated analysis of the pionic beta decay including all
electromagnetic contributions of order e**2 p**2. We discuss the extraction of
the Cabibbo-Kobayashi-Maskawa matrix element |Vud| from experimental data. The
method employed here is consistent with the analogous treatment of the Kl3
decays and the determination of |Vus|.


title: Electroweak baryon number violation

abstract:
  Electroweak baryon number violation may play a crucial role for the creation
of the matter-antimatter asymmetry in the early universe. In this talk, we
review the basic mechanism, which relies on the behavior of chiral fermions in
nontrivial Yang-Mills gauge field backgrounds.


title: Lepton Polarization and Forward-Backward Asymmetries in b -> s tau+ tau-

abstract:
  We study the spin polarizations of both tau leptons in the decay b -> s tau+
tau-. In addition to the polarization asymmetries involving a single tau, we
construct asymmetries for the case where both polarizations are simultaneously
measured. We also study forward-backward asymmetries with polarized tau's. We
find that a large number of asymmetries are predicted to be large, >~ 10%. This
permits the measurement of all Wilson coefficients and the b-quark mass, thus
allowing the standard model (SM) to be exhaustively tested. Furthermore, there
are many unique signals for the presence of new physics. For example,
asymmetries involving triple-product correlations are predicted to be tiny
within the SM, O(10^{-2}). Their observation would be a clear signal of new
physics.


title:
Triple gauge couplings in polarised e-e+ -> W-W+ and their measurement
  using optimal observables

abstract:
  The sensitivity of optimal integrated observables to electroweak triple gauge
couplings is investigated for the process e-e+ -> W-W+ -> 4 fermions at future
linear colliders. By a suitable reparameterisation of the couplings we achieve
that all 28 coupling parameters have uncorrelated statistical errors and are
naturally normalised for this process. Discrete symmetry properties simplify
the analysis and allow checks on the stability of numerical results. We
investigate the sensitivity to the couplings of the normalised event
distribution and the additional constraints that can be obtained from the total
rate. Particular emphasis is put on the gain in sensitivity one can achieve
with longitudinal beam polarisation. We also point out questions that may best
be settled with transversely polarised beams. In particular we find that with
purely longitudinal polarisation one linear combination of coupling parameters
is hardly measurable by means of the normalised event distribution.


title:
B0 -> D*- a1+: Chirality tests and resolving an ambiguity in
  2\beta+\gamma

abstract:
  We point out that the decays of B mesons into a vector meson and an
axial-vector meson can distinguish between left and right-handed polarized
mesons, in contrast to decays into two vector mesons. Measurements in B0 ->
D*-a1+ are proposed for testing factorization and the V-A structure of the weak
b -> c current, and for resolving a discrete ambiguity in 2\beta + \gamma.


title: Progress in Lattice QCD

abstract:
  After reviewing some of the mathematical foundations and numerical
difficulties facing lattice QCD, I review the status of several calculations
relevant to experimental high-energy physics. The topics considered are moments
of structure functions, which may prove relevant to search for new phenomena at
the LHC, and several aspects of flavor physics, which are relevant to
understanding CP and flavor violation.


title: Separation of Soft and Hard Physics in DVCS

abstract:
  A model for deeply virtual Compton scattering, based on analytical light-cone
hadron wave functions is presented and studied at energies currently accessible
at Jefferson Laboratory and DESY. It is shown that poles and perpendicular
vector components play an important role at Q^2 < 10 GeV^2. A Q^2 suppressed
diagram has to be included at these low energies, but becomes negligible above
10 GeV^2. Future prospects and developments of this model are discussed.


title: Charmless two-body B decays: A global analysis with QCD factorization

abstract:
  In this paper, we perform a global analysis of $B \to PP$ and $PV$ decays
with the QCD factorization approach. It is encouraging to observe that the
predictions of QCD factorization are in good agreement with experiment. The
best fit $\gamma$ is around $79^\circ$. The penguin-to-tree ratio $|P_{\pi
\pi}/T_{\pi \pi}|$ of $\pi^+ \pi^-$ decays is preferred to be larger than 0.3.
We also show the confidence levels for some interesting channels: $B^0 \to
\pi^0 \pi^0$, $K^+ K^-$ and $B^+ \to \omega \pi^+$, $\omega K^+$. For $B \to
\pi K^\ast$ decays, they are expected to have smaller branching ratios with
more precise measurements.


title: Computer Algebra in Particle Physics

abstract:
  These lectures given to graduate students in theoretical particle physics,
provide an introduction to the ``inner workings'' of computer algebra systems.
Computer algebra has become an indispensable tool for precision calculations in
particle physics. A good knowledge of the basics of computer algebra systems
allows one to exploit these systems more efficiently.


title:
Evaluations of freeze-out parameters from ${{dE_{T}} \over {d\eta}} /
  {{dN_{ch}} \over {d\eta}}$ ratio measured at RHIC and SPS

abstract:
  In the presented paper curves of constant $\epsilon_{T} / n_{charged}$ are
calculated in $T-\mu_{B}$ plane, in the framework of a single-freeze-out
thermal hadron gas model. The ratio is a theoretical equivalent of ${{dE_{T}}
\over {d\eta}}_{\mid \eta=0} / {{dN_{ch}} \over {d\eta}}_{\mid \eta=0}$
measured at RHIC and SPS. In both $\epsilon_{T}$ and $n_{charged}$ decays of
hadron resonances are taken into account. The freeze-out temperature
$T_{f.o.}=156_{-11}^{+14}$ MeV is obtained for RHIC, whereas $T_{f.o.}=134-140$
MeV is evaluated for SPS.


title: Neutrino Photon Interaction in a Magnetized Medium II

abstract:
  In the presence of a thermal medium or an external electro-magnetic field,
neutrinos can interact with photon, mediated by the corresponding charged
leptons (real or virtual). The effect of a medium or an electromagnetic field
is two-fold - to induce an effective $\nu \gamma$ vertex and to modify the
dispersion relations of all the particles involved to render the processes
kinematically viable. It has already been noted that in a medium neutrinos
acquire an effective charge, which in the standard model of electroweak
interaction comes from the vector type vertex of weak interaction. On the other
hand in a magnetized plasma, the axial vector part also start contributing to
the effective charge of a neutrino. This contribution corresponding to the
axial vector part in the interaction Lagrangian is denoted as the axial
polarisation tensor. In an earlier paper we explicitly calculated the form of
the axial polarisation tensor to all odd orders in external magnetic field. In
this note we complete that investigation by computing the same, to all even
orders in external magnetic field. We further show its gauge invarience
properties. Finally we infer upon the zero external momentum limit of this
axial polarisation tensor.


title: Understanding Heavy Quarkonium Systems in Perturbative QCD

abstract:
  We review the recent theoretical progress in heavy quarkonium spectroscopy
within the boundstate theory based on perturbative QCD. New microscopic
pictures of the heavy quarkonium systems are obtained.


title: Heavy and Excited Leptons in the OPAL Detector?

abstract:
  This M.Sc. thesis describes a search for exotic leptons. The search has been
performed using data from the OPAL detector at the Large Electron Positron
collider at CERN. The total integrated luminosity was 663 pb$^{-1}$ with center
of mass energies in the range of 183-209 GeV. The work has been concentrated on
the study of production of heavy leptons via the charged current channel and
disintegration of the $W$ into two quarks. In particular, single production of
heavy leptons in the mass region 100-170 GeV has been extensively studied. No
evidence for any new particles has been found. The results translate into upper
limits on the mixing between the heavy and the ordinary lepton for different
heavy lepton masses. The limits on the mixing angles are generally improved in
comparison with the nominal value $\zeta^2\sim 0.005$.


title:
Heavy-to-light decays at large recoil: Systematic treatment of short-
  and long-distance QCD effects

abstract:
  Heavy quark decays into energetic, collinear quarks and gluons are discussed
within an effective theory that accomplishes the factorization of soft and hard
strong interaction effects. We derive the relevant effective Lagrangian, and
perform the matching of the heavy quark current, including power corrections of
order 1/m, where m is the heavy quark mass. We apply our framework to
heavy-to-light form factors.


title: The $\nu_e \to \nu_\tau$ channel as a tool to solve ambiguities

abstract:
  In this talk I show how considering at the same time the $\nu_e \to \nu_\tau$
and the $\nu_e \to \nu_\mu$ oscillation channels the errors in the leptonic
CP-violating phase $\delta$ measurement could significantly be reduced.


title:
Burkhardt-Cottingham sum rule and forward spin polarizabilities in Heavy
  Baryon Chiral Perturbation Theory

abstract:
  We study spin-dependent sum rules for forward virtual Compton
scattering(VVCS) off the nucleon in heavy baryon chiral perturbation theory at
order $O(p^4)$. We show how these sum rules can be evaluated from low energy
expansions (in the virtual photon energy) of the forward VVCS amplitudes. We
study in particular the Burkhardt -Cottingham sum rule in HBChPT and higher
terms in the low energy expansion, which can be related to the generalized
forward spin polarizabilities of the nucleon. The dependence of these
observables on the photon virtuality $Q^2$ can be accessed, at small and
intermediate $Q^2$ values, from existing and forthcoming data at Jefferson Lab.


title:
Pomeron-Odderon interference effects in electroproduction of $\pi^+
  \pi^-$

abstract:
  We review the results of our studies on the charge and the spin asymmetries
in the electroproduction of $\pi^+ \pi^-$ which are the observables sensitive
to the Pomeron-Odderon interference.


title: How Well Do We Know the Electromagnetic Form Factors of the Proton?

abstract:
  Recent measurements of recoil polarization in elastic scattering have been
used to extract the ratio of the electric to the magnetic proton form factors.
These results disagree with Rosenbluth extractions from cross section
measurements, indicating either an inconsistency between the two techniques, or
a problem with either the polarization transfer or cross section measurements.
To obtain precise knowledge of the proton form factors, we must first
understand the source of this discrepancy.


title: Cosmological consequences of MSSM flat directions

abstract:
  We review the cosmological implications of the flat directions of the
Minimally Supersymmetric Standard Model (MSSM). We describe how field
condensates are created along the flat directions because of inflationary
fluctuations. The post-inflationary dynamical evolution of the field condensate
can charge up the condensate with B or L in a process known as Affleck-Dine
baryogenesis. Condensate fluctuations can give rise to both adiabatic and
isocurvature density perturbations and could be observable in future cosmic
microwave experiments. In many cases the condensate is however not the state of
lowest energy but fragments, with many interesting cosmological consequences.
Fragmentation is triggered by inflation-induced perturbations and the
condensate lumps will eventually form non-topological solitons, known as
Q-balls. Their properties depend on how supersymmetry breaking is transmitted
to the MSSM; if by gravity, then the Q-balls are semi-stable but long-lived and
can be the source of all the baryons and LSP dark matter; if by gauge
interactions, the Q-balls can be absolutely stable and form dark matter that
can be searched for directly. We also discuss some cosmological applications of
generic flat directions and Q-balls in the context of self-interacting dark
matter, inflatonic solitons and extra dimensions.