title: Delta I = 1/2 enhancement and the Glashow-Schnitzer-Weinberg sum rule

abstract:
  In 1967 Glashow, Schnitzer and Weinberg derived a sum rule in the soft-pion
and soft kaon limit relating the Delta I=1/2 non-leptonic K->2pi amplitude to
integrals over strange and non-strange spectral functions. Using the recent
ALEPH data from tau-decay, we show that the sum rule, slightly modified to
reduce contributions near the cut, yields the correct magnitude decay amplitude
corresponding to the Delta I=1/2 rule.


title: One-Particle Inclusive B sub s -> D bar sub s X Decays

abstract:
  We discuss one-particle inclusive B sub s -> D bar sub s X decays using a QCD
based method already applied to B -> D bar X. A link between the right charm
non-perturbative form factors of the semi-leptonic decays and those of the
non-leptonic decays is established. Our results are compatible with current
experimental knowledge.


title: Gauge Interactions in the Dual Standard Model

abstract:
  We present a geometric argument for the transformation properties of SU(5)
--> S(U(3) x U(2)) monopoles under the residual gauge symmetry. This strongly
supports the proposal that monopoles of the dual standard model interact via a
gauge theory of the standard model symmetry group, with the monopoles having
the same spectrum as the standard model fermions.


title: Resonant Slepton Production at the LHC

abstract:
  We consider the resonant production of charged sleptons at the LHC via
R-parity violation followed by gauge decays to a charged lepton and a
neutralino which then decays via R-parity violation. This gives a signature of
two like-sign charged leptons. In the simulation we include the full
hadronisation via Monte Carlo programs. We find a background, after cuts, of
5.1+/-2.5 events for an integrated luminosity of 10 fb^-1. A preliminary study
of the signal suggests that couplings of 2.10^-3 for a smuon mass of 223 GeV
and smuon masses of up to 540 GeV for couplings of 10^-2 can be probed.


title: Experimental Signatures of Split Fermions in Extra Dimensions

abstract:
  The smallness and hierarchy of the fermion parameters could be explained in
theories with extra dimensions where doublets and singlets are localized at
slightly separated points. Scattering cross sections for collisions of such
fermions vanish exponentially at energies high enough to probe the separation
distance. This is because the separation puts a lower bound on the attainable
impact parameter in the collision. The NLC, and in particular the combination
of the e^+e^- and e^-e^- modes, can probe this scenario, even if the inverse
fermion separation is of order tens of TeVs.


title:
Detecting a light Higgs boson at the Fermilab Tevatron through enhanced
  decays to photon pairs

abstract:
  We analyze the prospects of the Tevatron for finding a Higgs boson in the two
photon decay mode. We conclude that the Standard Model (SM) Higgs boson will
likely not be discovered in this mode. However, we motivate several theories
beyond the SM, including the MSSM, that predict a Higgs boson with enhanced
branching fractions into photons, and calculate the luminosity needed to
discover a general Higgs boson at the Tevatron by a two-photon invariant mass
peak at large transverse momentum. We find that a high luminosity Tevatron will
play a significant role in discovering or constraining these theories.


title: From scalar to string confinement

abstract:
  We outline a connection between scalar quark confinement, a
phenomenologically successful concept heretofore lacking fundamental
justification, and QCD. Although scalar confinement does not follow from QCD,
there is an interesting and close relationship between them. We develop a
simple model intermediate between scalar confinement and the QCD string for
illustrative purposes. Finally, we find the bound state masses of scalar,
time-component vector, and string confinement analytically through
semi-classical quantization.


title: The Nambu-Goto action as the one of the quantized space-time excitation

abstract:
  The concept of the quantized space-time of the formless finite fundamental
elements is suggested. This space-time can be defined as a set of continual
space-time coverings by simply connected non-overlapping regions of any form
and arbitrary sizes with some probability measure. The functional integrating
method and the space-time action problem are analyzed. A string in this
space-time is considered as an excitation of a number of fundamental elements
forming one-dimensional curve. It is possible to direct the way for the volume
term of the space-time action to yield the Nambu-Goto action with this
consideration.


title: Muon g-2 and precision electroweak physics in the MSSM

abstract:
  The minimal supersymmetric extension of standard model (MSSM) is examined by
analyzing its quantum effects on the precision electroweak measurements and the
muon g-2. We examine carefully the effects of light charginos and neutralinos
that are found to improve the fit to the electroweak data. We identify two
distinct regions on the $(\mu, M_2)$-plane that fit well to the electroweak
data and give significant contribution to muon g-2.


title: Bremsstrahlung from an Equilibrating Quark-Gluon Plasma

abstract:
  The photon production rate from a chemically equilibrating quark-gluon plasma
likely to be produced at RHIC (BNL) and LHC (CERN) energies is estimated taking
into account bremsstrahlung. The plasma is assumed to be in local thermal
equilibrium, but with a phase space distribution that deviates from the Fermi
or Bose distribution by space-time dependent factors (fugacities). The photon
spectrum is obtained by integrating the photon rate over the space-time history
of the plasma, adopting a boost invariant cylindrically symmetric transverse
expansion of the system with different nuclear profile functions. Initial
conditions obtained from a self-screened parton cascade calculation and, for
comparison, from the HIJING model are used. Compared to an equilibrated plasma
at the same initial energy density, taken from the self-screened parton
cascade, a moderate suppression of the photon yield by a factor of one to five
depending on the collision energy and the photon momentum is observed. The
individual contributions to the photon production, however, are completely
different in the both scenarios.


title: Resonant Amplification of Gauge Fields in Expanding Universe

abstract:
  We investigate the possibility that gauge fluctuations are amplified in an
expanding universe by parametric resonance, during the oscillatory regime of a
scalar field to which they are coupled. We investigate the couplings of gauge
fields to a charged scalar field and to an axion. For both couplings, gauge
field fluctuations undergo exponential instabilities. We discuss how the
presence of other charges or currents may counteract the resonance, but we
argue that in some cases the resonance will persist and that hence this
mechanism could have some relevance for the problem of large scale primordial
magnetic fields.


title:
Derivation of O(q^4) Effective Lagrangian in the Presence of External
  Fields Directly Within Heavy Baryon Chiral Perturbation Theory

abstract:
  This is a progress report on the extension of the analysis of hep-ph/9909498
to constructing a complete list of O(q^4) terms in the presence of external
fields, directly within Heavy Baryon Chiral Perturbation Theory (HBChPT) {\it
without having to first construct the relativistic BChPT Lagrangian and then
carry out the ${1\over\rm m}$-reduction}. In addition to a phase rule to
implement all symmetries including charge conjugation invariance directly at
the nonrelativistic level, generalized Jacobi identities, curvature relation
(that relates the commutator of two covariant derivatives to a linear
combination of the traceless and isosinglet field strengths and the commutator
of two axial vector building blocks), Schouten's identity and the relationship
between the antisymmetrized covariant derivative - axial-(building block)
vector commutator and another traceless field strength, are used to ensure
linear independence of the terms and their low energy coupling constants. We
first construct O($q^4$) terms for off-shell nucleons, and then perform the
on-shell reduction, again within HBChPT.


title: Particle Interferometry from 40 MeV to 40 TeV

abstract:
  We review particle interferometry before 2000, including: basics and
formalism of quantum-statistical correlations; model-independent analysis of
short-range correlations; Coulomb wave-function corrections and the core/halo
picture for $n$-particle Bose-Einstein correlations; graph rules to calculate
these correlations even with partial coherence in the core; particle
interferometry in $e^+e^-$ collisions including the Andersson-Hofmann model;
invariant Buda-Lund particle interferometry; Buda-Lund, Bertsch-Pratt and
Yano-Koonin-Podgoretskii parameterizations; Buda-Lund hydro model and its
applications to (\pi/K)+p and Pb+Pb collisions at CERN SPS, as well as to low
energy heavy ion collisions; binary source formalism and the related
oscillations in the two-particle Bose-Einstein and Fermi-Dirac correlation
functions; experimental signs of expanding rings of fire and shells of fire in
particle and heavy ion physics and their similarity to planetary nebulae in
stellar astronomy; signal of partial restoration of the U_A(1) symmetry
restoration in the two-pion correlation function; back-to-back correlations of
bosons with in-medium mass modifications; and the analytic solution of the
pion-laser model.

categories: hep-ph astro-ph hep-ex nucl-ex nucl-th quant-ph


title: On the Quark-Quark Superconducting Pairing Induced by Instantons in QCD

abstract:
  The superconducting pairing of quarks induced by instantons in QCD is studied
by means of the functional integral method. The integral equation determining
the critical temperature of the superconducting phase transition is
established. It is shown that the Bose condensate of diquarks consists of color
antitriplet $(\bar{3}) $ scalar diquarks


title: The Delta I = 1/2 Rule and epsilon'/epsilon in the Chiral Quark Model

abstract:
  I discuss the role of the Delta I = 1/2 selection rule in K -> pi pi decays
for the theoretical calculations of eps'/eps. Lacking reliable ``first
principle'' calculations, phenomenological approaches may help in understanding
correlations among different contributions and available experimental data. In
particular, in the chiral quark model approach the same dynamics which
underlies the Delta I = 1/2 selection rule in kaon decays appears to enhance
the K -> pi pi matrix elements of the gluonic penguins, thus driving eps'/eps
in the range of the recent experimental measurements.


title: R-parity Violation and Neutrino Masses

abstract:
  R-parity violation in the supersymmetric standard model could be the origin
of neutrino masses and mixing accounting for the atmospheric and solar neutrino
oscillations. More interestingly, this hypothesis may be tested in future
colliders by detecting lepton number violating decays of the lightest
supersymmetric particle. Here, we present a comprehensive analysis for the
determination of sneutrino vacuum expectation values from the one-loop
effective scalar potential, and also for the one-loop renormalization of
neutrino masses and mixing. Applying our results to theories with gauge
mediated supersymmetry breaking, we discuss the effects of the one-loop
corrections and how the realistic neutrino mass matrices arise.


title: A Model for the Colour Form Factor of the Proton

abstract:
  The total cross-section and the jet cross-section differ at a proton-proton
collision. The latter is divergent if arbitrarily small transverse momenta are
allowed. Even with some fixed lower pt cutoff, increases the jet cross-section
much faster than the total cross-section at high energies. We have in this
paper studied how the divergence could be tamed by colour screening effects
among the partons. To do this we have built a proton model where we assign
momenta, positions and colour-charge to all partons in the proton. We find that
the relative behaviour of the cross-section can be better understood by the
inclusion of this effect.


title: Moduli constraints on primordial black holes

abstract:
  The amount of late decaying massive particles (e.g., gravitinos, moduli)
produced in the evaporation of primordial black holes (PBHs) of mass
$\Mbh\la10^9 $g is calculated. Limits imposed by big-bang nucleosynthesis on
the abundance of these particles are used to constrain the initial PBH mass
fraction $\beta$ (ratio of PBH energy density to critical energy density at
formation), as: $\beta\la 5\times10^{-19} (\xp/6 10^{-3})^{-1} (\Mbh/10^9 {\rm
g})^{-1/2} (\bar{\Yp}/10^{-14})$; $\xp$ is the fraction of PBH luminosity going
into gravitinos or moduli, $\bar{\Yp}$ is the upper bound imposed by
nucleosynthesis on the number density to entropy density ratio of gravitinos or
moduli. This notably implies that such PBHs should never come to dominate the
cosmic energy density.


title: Meson Properties in the 1/N_c-corrected NJL model

abstract:
  Properties of mesons are investigated within the Nambu--Jona-Lasinio model.
We include meson-loop corrections, which are generated via a systematic
1/N_c-expansion in next-to-leading order. We show that our scheme is consistent
with chiral symmetry, in particular with the Goldstone theorem and the
Gell-Mann Oakes Renner relation. The numerical part focuses on the pion and the
rho-meson sector. For the latter the 1/N_c-corrections are crucial in order to
include the dominant rho -> pi pi-decay channel, while the leading-order
approximation only contains unphysical q\bar q-decay channels. We show that a
satisfactory description of the pion electromagnetic form factor can be
obtained. Similarities and differences to hadronic models are discussed.


title:
Non-Standard Model of the Nucleon Electromagnetic Structure and its
  Predictability

abstract:
  Unitary and analytic ten-resonance model of the nucleon electromagnetic
(e.m.) structure with canonical normalizations and asymptotics is constructed
on a four-sheeted Riemann surface. It describes well all existing experimental
space-like and time-like data on the nucleon e.m. form factors (ff's),
including also FENICE (Frascati) results on the neutron, for the first time.
This is achieved without any external constraints on the isovector spectral
functions following from the piN-scattering data and pion e.m. ff behaviour
through the unitarity condition. Just opposite, the model itself predicts a
pronounced effect of the two-pion continuum on the isovector spectral functions
revealing the strong enhancement of the left wing of the rho(770)-resonance
close to two-pion threshold. The existence of the fourth excited state of the
rho(770) meson with parameters mass and width equal to 2506 MeV and 700 MeV,
respectively. The isoscalar spectral function behaviours are predicted by the
presented model.


title: First-Order Phase Transitions in an Early-Universe Environment

abstract:
  In first-order phase transitions in the early universe, the bubble wall is
expected to be significantly slowed-down by its interaction with the
surrounding plasma. We examine the behaviour of the phase of the Higgs field
after two-bubble collisions, and find that phase differences equilibrate much
more quickly in slow-moving bubbles than in those which expand at the speed of
light. This could lead to a significant reduction in the initial density of
topological defects formed at a first-order phase transition.


title: Can extended duality uniquely explain the dilepton data in HICs at SPS?

abstract:
  Extended duality is used to explain the dilepton data of heavy-ion
experiments at CERN-SPS. Taking into account the background contributions
(hadronic cocktail, Drell-Yan, semileptonic decays of open charm) the spectral
shapes of the CERES, NA38/50 and HELIOS-3 data in experiments with lead and
sulfur beams can be well described, however, the normalizations of the sulfur
beam data are problematic.


title: Baryon magnetic moments in the QCD string approach

abstract:
  Magnetic moments of baryons composed of light and strange quarks are computed
for the first time through the only parameter of the model -- string tension
$\sigma$. Resulting theoretical values differ from the experimental ones
typically by about
  10%.


title: Test of the QCD vacuum with the sources in higher representations

abstract:
  Recent accurate measurement by G.Bali of static potentials between sources in
various SU(3) representations provides a crucial test of the QCD vacuum and of
different theoretical approaches to the confinement. In particular, the Casimir
scaling of static potentials found for all measured distances implies a strong
suppression of higher cumulants and a high accuracy of the Gaussian stochastic
vacuum. Most popular models are in conflict with these measurements.


title:
On a possibility to determine the S-factor of the hep process in
  experiments with thermal (cold) neutrons

abstract:
  The problem of the magnitude of the S--factor of the hep process $p +
{^3\mathrm{He}} \to {^4\mathrm{He}} + e^+ + \nu_e$ is one of the most important
unsolved problems in nuclear astrophysics. The magnitude of $S(hep)$ has also
an important impact on the interpretation of the Super-Kamiokande solar
neutrino results in terms of neutrino oscillations. We point out the possiblity
to determine the major hadronic contribution to $S(hep)$ from the measurement
of the total cross section of the process $n + {^3\mathrm{H}} \to
{^4\mathrm{He}} + e^- + \bar{\nu}_e$ in experiments with high intensity beams
of thermal or cold neutrons.


title:
How Neutrinos Get Mass and What Other Things May Happen Besides
  Oscillations

abstract:
  In this talk I address the theoretical issue of what new physics is required
to make $m_\nu \neq 0$. I then discuss what other things may happen besides
neutrino oscillations. In particular I consider a possible new scenario of
leptogenesis in R parity nonconserving supersymmetry.


title:
TeV Gravitons and Kaluza-Klein Excitations in $e^+e^-$ and $e^-e^-$
  Collisions

abstract:
  We review the capability of $e^+e^-$ and $e^-e^-$ colliders to detect the
virtual exchange of Kaluza-Klein towers of gravitons within the large extra
dimension scenario of Arkani-Hamed, Dimopoulos and Dvali and in the localized
gravity model of Randall and Sundrum with non-factorizable geometry.


title: Signatures of Extra Dimensions at e-gamma and gamma-gamma Colliders

abstract:
  We study the processes \gamma \e -> \gamma \e and \gamma \gamma -> \gamma
\gamma, in the context of the proposal for Weak Scale Quantum Gravity (WSQG)
with large extra dimensions. With an ultraviolet cutoff $M_S \sim 1$ TeV for
the effective gravity theory, the cross sections obtained for these processes
at the Next Linear Collider (NLC), with the \e \gamma an \gamma \gamma options,
deviate from the predictions of the Standard Model significantly. Our results
suggest that, for typical proposed NLC energies and luminosities, the
predictions of WSQG can be tested in the range 1 TeV \lsim M_S \lsim 10 TeV,
making \e \gamma an \gamma \gamma colliders important tools for probing WSQG.


title: Anomaly mediated SUSY breaking at the LHC

abstract:
  Anomaly Mediated SUSY Breaking models are reviewed. Possible signatures at
the LHC for one case of the minimal realistic model are examined.


title: Electrons, New Physics, and the Future of Parity-Violation

abstract:
  The study of parity-violation in semi-leptonic processes has yielded
important insights into the structure of the Standard Model and the
substructure of the nucleon. I discuss the future of semi-leptonic
parity-violation and the role it might play in uncovering physics beyond the
Standard Model.


title: Quark-Antiquark Pairing Induced by Instantons in QCD

abstract:
  The quark-antiquark pairing due to the four-fermion direct coupling induced
by the instantons in QCD is studied in the framework of the functional integral
method. The integral equations for the order parameters are derived. Several
classes of the solutions of these non-linear equations are considered in
details. Their implications for the dynamical symmetry breakings are discussed


title: B-meson hadroproduction cross sections and up-to-date models

abstract:
  The comparison of B-meson production cross sections as the results of PYTHIA
code and Quark Gluon String Model (QGSM) is carried out for energies of proton
colliders: $Sp\bar(p)S$, Tevatron and LHC. Model predictions are based on the
theory of supercritical Pomeron exchanges with the phenomenological intercept
$\Delta_P$(0)=0.3, accepted for heavy quark production.Transverse momentum
spectra of B-mesons are also compared. It is shown that the cross sections
calculated with PYTHIA using CTEQ structure functions are in a contradiction
with the asymptotical estimation of B$\bar{B}$ production cross sections in
QGSM. Asymmetries between the spectra of $B^0$ and $\bar{B0}$ mesons are also
contradicting. The reasons of the difference are discussed.


title:
Constraining Penguin Contributions and the CKM Angle $\gamma$ through
  $B_d\to\pi^+\pi^-$

abstract:
  The decays $B_d\to\pi^+\pi^-$ and $B_s\to K^+K^-$ provide an interesting
strategy to extract the CKM angle $\gamma$ at ``second-generation'' $B$-physics
experiments of the LHC era. A variant for ``first-generation'' experiments can
be obtained, if $B_s\to K^+K^-$ is replaced by $B_d\to\pi^\mp K^\pm$. We show
that the most recent experimental results for the CP-averaged
$B_d\to\pi^+\pi^-$ and $B_d\to\pi^\mp K^\pm$ branching ratios imply a rather
restricted range for the corresponding penguin parameters, and upper bounds on
the direct CP asymmetries $A_{CP}^{dir}(B_d\to\pi^+\pi^-)$ and
$A_{CP}^{dir}(B_d\to\pi^\mp K^\pm)$. Moreover, we point out that interesting
constraints on $\gamma$ can be obtained from the CP-averaged $B_d\to\pi^+\pi^-$
and $B_d\to\pi^\mp K^\pm$ branching ratios, if in addition mixing-induced CP
violation in the former decay is measured, and the $B^0_d$--$\bar{B^0_d}$
mixing phase is fixed through $B_d\to J/\psi K_S$. An extraction of $\gamma$
becomes possible, if furthermore direct CP violation in $B_d\to\pi^+\pi^-$ or
$B_d\to\pi^\mp K^\pm$ is observed.


title: Radiative Corrections to scalar quark decays in the MSSM

abstract:
  We review the one-loop corrections to the partial decay width of
sbottom-quark into a top quark and a chargino for the parameter space relevant
to the TESLA e+e- linear collider. We present the results available in the
literature for the QCD and the Yukawa coupling corrections in a unified
framework. In this way a direct comparison of the size of the various
corrections is possible.


title: Light vector meson photoproduction at large t

abstract:
  We have studied in perturbative QCD all independent helicity amplitudes
describing the photoproduction of light vector mesons at large $t$. We found a
new hard production mechanism which is related to the possibility for a real
photon to fluctuate into a massless $q\bar q$ pair in a chiral-odd spin
configuration. Each helicity amplitude is given as a sum of a usual chiral-even
contribution (when the helicities of quark and antiquark are antiparallel) and
this additional chiral-odd part (where the helicities of quark and antiquark
are parallel). The chiral-odd contribution is large, it leads to a dominance of
the non spin-flip amplitude in a very broad region of intermediately high
$|t|$. All amplitudes are expressed in terms of short distance asymptotics of
the light-cone wave functions of vector meson (photon). We demonstrate that for
each helicity amplitude there exists a soft non-factorizable contribution. We
give arguments that for dominant non spin-flip helicity amplitude the relative
contribution of the soft nonfactorizable interactions is numerically not large.


title: Overview of Chiral Perturbation Theory

abstract:
  I present a quick overview of the current status of Chiral perturbation
theory in the meson sector. To illustrate the successes and some problems in
the description of the phenomenology, I focus on a few selected examples that
are relevant for DAFNE.


title: Supersymmetry in Particle Physics: The Renormalization Group Viewpoint

abstract:
  An attempt is made to present modern hopes to find manifestation of
supersymmetry, a new symmetry that relates bosons and fermions, in particle
physics from the point of view of renormalization group flow. The Standard
Model of particle interactions is briefly reviewed, the main notions of
supersymmetry are introduced. In more detail the RG flow in the Minimal
Supersymmetric Standard Model is considered. Predictions of particle spectrum
are obtained based on the RG fixed points.


title: K_{l4} decays

abstract:
  An effective theory of large N_{C} QCD of mesons has been used to study six
K_{l4} decay modes. It has been found that the matrix elements of the
axial-vector current dominate the K_{l4} decays. PCAC is satisfied. A
relationship between three form factors of axial-vector current has been found.
Non-zero phase shifts are originated in \rho-->\pi\pi. The decay rates are
calculated in the chiral limit. In this study there is no adjustable parameter.


title:
$\Lambda$, $\bar{\Lambda}$ Polarization and Spin Transfer in Lepton
  Deep-Inelastic Scattering

abstract:
  The flavor and helicity distributions of the $\Lambda$ and $\bar{\Lambda}$
hyperons for both valence and sea quarks are calculated in a perturbative QCD
(pQCD) based model. We relate these quark distributions to the fragmentation
functions of the $\Lambda$ and $\bar{\Lambda}$, and calculate the
$z$-dependence of the longitudinal spin transfer to the $\Lambda$ and
$\bar{\Lambda}$ in lepton deep-inelastic scattering (DIS). It is shown that the
spin transfer to the $\Lambda$ is compatible with the first HERMES results at
DESY and further tests are suggested. We also make predictions for the
$z$-dependence of the $\Lambda$ and $\bar{\Lambda}$ longitudinal polarizations
in neutrino (antineutrino) DIS processes. We investigate the sea contribution
to the fragmentation functions, and we test a possible scenario where sea
quarks in $\Lambda$ (or sea antiquarks in $\bar{\Lambda}$) are negatively
polarized, whereas sea antiquarks in the $\Lambda$ (or sea quarks in
$\bar{\Lambda}$) are positively polarized. The asymmetry of the polarized
fragmentation functions of sea quarks and antiquarks to $\Lambda$ and
$\bar{\Lambda}$ provides a way to understand the different behaviour between
the $\Lambda$ and $\bar{\Lambda}$ spin transfers observed in the recent E665
experiment at FNAL.


title:
A Pomeron Approach to Hadron-Nucleus and Nucleus-Nucleus "Soft"
  Interactions at High Energy

abstract:
  We formulate a generalization of the Glauber formalism for hadron-nucleus and
nucleus-nucleus collisions based on the Pomeron approach to high energy
interactions. Our treatment is based on two physical assumptions (i.e. two
small parameters) : (i) that only sufficiently small distances contribute to
the Pomeron structure; and (ii) the triple Pomeron vertex $G_{3P}/g_{P-N}
  \ll 1$ (where $g_{P-N}$ is the Pomeron-nucleon vertex) is small. A systematic
method is developed for calculating the total, elastic and diffractive
dissociation cross sections as well as the survival probability of large
rapidity gap processes and inclusive observables, both for hadron - nucleus and
nucleus-nucleus collisions. Our approach suggests saturation of the density of
the produced hadrons in nucleus-nucleus collisions, the value of the saturation
density turns out to be large and depends on the number of nucleons in the
lightest nucleus.


title:
A Comparison between Relativistic and Semi-Relativistic Treatment in the
  Diquark-Quark Model

abstract:
  In the diquark-quark model of the nucleon including scalar and axialvector
diquarks we compare solutions of the ladder Bethe-Salpeter equation in the
instantaneous Salpeter approximation and in the fully covariant (i.e.
four-dimensional) treatment. We obtain that the binding energy is severly
underestimated in the Salpeter approximation. For the electromagnetic form
factors of the nucleon we find that in both approaches the overall shapes of
the respective form factors are reasonably similar up to $Q^2 \approx 0.4$
GeV^2. However, the magnetic moments differ substantially as well as results
for the pion-nucleon and the axial coupling of the nucleon.


title:
Description of local multiplicity fluctuations and genuine multiparticle
  correlations

abstract:
  Various parametrizations of the multiplicity distribution are studied using
the recently published large statistics OPAL results on multidimensional local
fluctuations and genuine correlations in e+e- -> Z -> hadrons. The measured
normalized factorial and cumulant moments are compared to the predictions of
the negative binomial distribution, the modified and generalized versions of
it, the log-normal distribution and the model of the generalized birth process
with immigration. This is the first study which uses the multiplicity
distribution parametrizations to describe high-order genuine correlations.
Although the parametrizations fit well the measured fluctuations and
correlations for low orders, they do show certain deviations at high orders. We
have shown that it is necessary to incorporate the multiparticle character of
the correlations along with the property of self-similarity to attain a good
description of the measurements.


title:
P-Parity Violating Bound States of Particles with Anomalous Magnetic
  Moment

abstract:
  We consider bound states of fermions with an anomalous magnetic
moments(neutrinos,neutrons) in radial electric and magnetic field of
monopole.In case of radial magnetic field the interaction $\vec{\Sigma}\vec{H}$
violates P-parity and for this reason we must use the method of
(hep-ph/9901248) where both components of spinor considererd as a linear
combination of spheric spinors with different P-parity. Also we apply
pseudoscalar-like interaction (2) obtained in \cite{DF} to monopole case and
add it in Dirac equation.We obtain the system of differential equations for
radial functions which define energy levels of fermions with anomalous magnetic
moments in the presence of monopole.


title: Neutrino physics

abstract:
  In the present lectures the following topics are considered: general
properties of neutrinos, neutrino mass phenomenology (Dirac and Majorana
masses), neutrino masses in the simplest extensions of the standard model
(including the seesaw mechanism), neutrino oscillations in vacuum, neutrino
oscillations in matter (the MSW effect) in 2- and 3-flavour schemes,
implications of CP, T and CPT symmetries for neutrino oscillations, double beta
decay, solar neutrino oscillations and the solar neutrino problem, and
atmospheric neutrinos. We also give a short overview of the results of the
accelerator and reactor neutrino experiments and of future projects. Finally,
we discuss how the available experimental data on neutrino masses and lepton
mixing can be summarized in the phenomenologically allowed forms of the
neutrino mass matrix.


title:
A Phenomenological Description of (\pi^{-}\Delta^{++}) Photo- and
  Electroproduction in Nucleon Resonance Region

abstract:
  The (\pi^{-}\Delta^{++}) production on the nucleon by real and virtual
photons is discussed as initial step in a simple model approach for the two
pion photo- and electroproduction on the nucleon, with emphasis on nucleon
resonance excitation which is of interest for new facilities like TJNAF. A
calculation for (\pi^{-}\Delta^{++}) channel in resonance excitation region is
presented and compared to existing experimental data along with a discussion of
physical effects that we find to be of relevance. The calculation is proposed
as a starting basis for the investigation of (N^{*}) electromagnetic form
factors using experimental data about two pion production by real and virtual
photons.


title: B to D(*) pi- beyond naive factorization in the heavy quark limit

abstract:
  Nonleptonic decays B to D pi- or B to D* pi- are dominated by factorizable
contributions. In the heavy quark limit, nonfactorizable contribution arises
from strong radiative correction and power corrections in 1/m_b. I calculate
the decay rates for B to D(*) pi- at next-to-leading order in strong
interaction, including nonfactorizable corrections. The result is expressed in
terms of a convolution of the hard scattering amplitude and the pion wave
function. The decay amplitudes in this method are independent of the gauge, the
renormalization scale, and the renormalization scheme. The effects of the
nonfactorizable contribution are discussed and numerical estimates are
presented.


title: Lepton Energy Asymmetry and Precision SUSY study at Hadron Colliders

abstract:
  We study the distribution of lepton pairs from the second lightest neutralino
decay \tilde{\chi}^0_2-->\tilde{l}l followed by \tilde{l}\to \tilde{\chi}^0_1
l. The distribution of the ratio of lepton transverse momenta A_T shows peak
structure if m_{ll}< m^{max}_{ll}/2 is required. The peak position A_T^{peak}
is described by a simple function of the ino and slepton masses in the
m_{ll}\sim 0 limit. When a moderate m_{ll} cut is applied, A_T^{peak} depends
on the \tilde{\chi}^0_2 velocity distribution, but the dependence would be
corrected by studying the lepton P_T distribution. A_T^{peak} and the edge of
m_{ll} distributions are used to determine the mass parameters involved in the
decay for parameters of interest to LHC experiments. For some cases the ino and
slepton masses may be determined within 10% by the lepton distribution only
independent of model assumptions. Correct combinations of A_{T}^{peak} and
m_{ll}^{edge} would be identified even if different \tilde{\chi}^0_2 decay
chains are co-existing. The analysis could be extended to the Tevatron energy
scale or other cascade decays.


title:
Structure function of the nucleus in the perturbative QCD with
  $N_c\to\infty$ (BFKL pomeron fan diagrams)

abstract:
  Equation for the sum of BFKL pomeron fan diagrams is rederived by direct
summation and solved numerically for rapidities $y\leq 50$. At high rapidities
y>20 the resulting cross-sections for the scattering of a longitudinally
polarized $q\bar q$ pair on the nucleus cease to depend on its transverse
dimension and tend to a constant limit 0.1768 $R_A^2$, which corresponds to
scattering of a colour dipole on a black disk. Thus the unitarity is restored
and the singularity in the j plane is reduced to a simple pole at j=1.The
nuclear structure function at small x behaves as $Q^2\ln(1/x)$. The found gluon
density has a soliton-like form in the $\log k$ space: its form is close to
Gaussian, independent of rapidity, the centermoving towards higher $\log k$
with a nearly constant velocity as rapidity increases.


title:
Constraining the Higgs boson mass through the combination of direct
  search and precision measurement results

abstract:
  We show that the likelihood ratio of Higgs search experiments is a form to
report the experimental results suitable to be combined with the information
from precision measurements to obtain a joint constraint on the Higgs mass. We
update our previous combined analysis using the new results on direct searches
and recent precision measurements, including also the Z0 leptonic partial width
result. The method is also improved to take into account small non linearity
effects in the theoretical formulae. We find an expected value for the Higgs
mass around 160-170 GeV with an expectation uncertainty, quantified by the
standard deviation of the distribution, of about 50-60 GeV. The 95% probability
upper limit comes out to be around 260-290 GeV.


title: Observing the Odderon: Tensor Meson Photoproduction

abstract:
  We calculate high-energy photoproduction of the tensor meson $f_2(1270)$ by
odderon and photon exchange in the reaction $\gamma + {\rm{p}} \to f_2(1270) +
{\rm{X}}$, where X is either the nucleon or the sum of the N(1520) and N(1535)
baryon resonances. Odderon exchange dominates except at very small transverse
momentum, and we find a cross section of about 20 nb at a centre-of-mass energy
of 20 GeV. This result is compared with what is currently known experimentally
about $f_2$ photoproduction. We conclude that odderon exchange is not ruled out
by present data. On the contrary, an odderon-induced cross section of the above
magnitude may help to explain a puzzling result observed by the E687
experiment.


title:
Dispersion Relation Analyses of Pion Form Factor, Chiral Perturbation
  Theory and Unitarized Calculations

abstract:
  The Vector Pion form factor below 1 GeV is analyzed using experimental data
on its modulus, the P-wave pion pion phase shifts and dispersion relation. It
is found that causality is satisfied. Using dispersion relation, terms
proportional to s squared and s cubed are calculated using the experimental
data, where s is the momentum transfer. They are much larger than the one-loop
and two-loop Chiral Perturbation Theory calculations. Unitarized model
calculations agree very well with dispersion relation results.


title:
Quark distribution functions in the chiral quark-soliton model:
  cancellation of quantum anomalies

abstract:
  In the framework of the chiral quark-soliton model of the nucleon we
investigate the properties of the polarized quark distribution. In particular
we analyse the so called anomalous difference between the representations of
the quark distribution functions in terms of occupied and non-occupied quark
states. By an explicit analytical calculation it is shown that this anomaly is
absent in the polarized isoscalar distribution \Delta u + \Delta d, which is
ultaviolet finite. In the case of the polarized isovector quark distribution
\Delta u - \Delta d the anomaly can be cancelled by a Pauli-Villars subtraction
which is also needed for the regularization of the ultraviolet divergence.


title: Predictions for Z --> mu tau and Related Reactions

abstract:
  We discuss predictions for the lepton-flavour changing decays Z --> e mu, mu
tau, e tau which may be searched for at the Giga-Z option of the Tesla Linear
Collider project with Z resonance production rates as high as 10^9. We try to
be as model-independent as possible and consider both the Dirac and Majorana
mass cases. The Standard Model, if being minimally extended by the inclusion of
light neutrino masses with some mixings as observed in neutrino oscillation
search experiments, predicts completely negligible rates. With a more general
neutrino content quite interesting expectations may be derived.


title: Electroweak Bubble Wall Friction: Analytic Results

abstract:
  We present an entirely analytic, leading log order determination of the
friction an electroweak bubble wall feels during a first order electroweak
phase transition. The friction is dominated by W bosons, and gives a wall
velocity parametrically ~ alpha_w, and numerically small, ~ .01 -- 0.1
depending on the Higgs mass.


title:
Muon-proton Colliders: Leptoquarks, Contact Interactions and Extra
  Dimensions

abstract:
  We discuss the physics potential of the $\mu p$ collider; especially,
leptoquarks, leptogluons, R-parity violating squarks, contact interactions, and
large extra dimensions. We calculate the sensitivity reach for these new
physics at $\mu p$ colliders of various energies and luminosities.


title: On The tau --> a sub 1 h nu sub tau Decays

abstract:
  The \tau \to (a_1 h)^- \nu_{\tau} decays of the \tau-lepton are studied using
the method of phenomenological chiral Lagrangians. The expression of weak
hadronic currents between pseudoscalar and axial-vector meson states is
obtained. Calculated partial widths for these decays are compared with the
available experimental data.


title: The two-body electromagnetic pulsar

abstract:
  The power spectrum formula of the synchrotron radiation generated by the
electron and positron moving at the opposite angular velocities in homogenous
magnetic field is derived in the Schwinger version of quantum field theory. The
asymptotical form of this formula is found. It is surprising that the spectrum
depends periodically on radiation frequency omega which means that the system
composed from electron, positron and magnetic field forms the two-body
electromagnetic pulsar.


title:
Production of bound triplet $\mu^{+} \mu^{-}$ system in collisions of
  electrons with atoms

abstract:
  This paper deals with the production of orthodimuonium (OM) ($\mu^{+}
\mu^{-}$ atom in triplet state) in collisions of high-energy electrons with
nuclei or atoms. This reaction was previously studied by Holvik and Olsen
[Phys. Rev. D 35, 2124 (1987)] on the basis of a bremsstrahlung mechanism where
OM is produced by only one virtual photon. In the present paper we consider a
competing three-photon mechanism where the production of OM results from the
collision of a photon generated by the electron with two photons emitted by the
nucleus. We derive the corresponding spectrum and production rate of OM and
show that the three-photon mechanism is the dominant one for heavy atom target.


title: DIRAC Experiment and Test of Low-Energy QCD

abstract:
  The low-energy QCD predictions to be tested by the DIRAC experiment are
revised. The experimental method, the setup characteristics and capabilities,
along with first experimental results are reported. Preliminary analysis shows
good detector performance: alignment error via $\Lambda$ mass measurement
$m_\Lambda = 1115.6 MeV/c^2$ with $\sigma = 0.92 MeV/c^2$, $p \pi^-$ relative
momentum resolution $\sigma_Q \approx 2.7 MeV/c$, and evidence for $\pi^+
\pi^-$ low momentum Coulomb correlation.


title: Preasymptotic effects in beauty decays

abstract:
  Large preasymptotic effects in beauty decays have been found using
heavy-quark and SU(3) symmetry, as well as experimental data on charmed
hyperons. Contrary to rather uniform beauty-meson lifetimes, a much larger
spread of beauty-baryon lifetimes is predicted. However, it is highly unlikely
that, theoretically, the $ \tau(\Lambda_b)/\tau(B_d^0) $ ratio, which at
present deviates more than $1\sigma$ from the experimental result, can be
lowered below 0.9.


title: Effective Field Theory and $\chi$pt

abstract:
  A brief introduction to the subject of chiral perturbation theory ($\chi$pt)
is given, including a discussion of effective field theory and application to
the upcoming Bates virtual Compton scattering measurement.


title: Quantum electrodynamics of composite fermions

abstract:
  The quantum Dirac-like equation and the QED vertex operator for a composite
particle are suggested. The vertex operator and the fermionic propagator are
connected by the QED Ward identity. It is shown that all of the Feynman
QED-integrals for a three-component particle are finite with some suggestion
about large momentum dependence of the vertex operator. This dependence is in
agreement with the component counting rules.


title: Standard Model: An Introduction

abstract:
  We present a primer on the Standard Model of the electroweak interaction.
Emphasis is given to the historical aspects of the theory's formulation. The
radiative corrections to the Standard Model are presented and its predictions
for the electroweak parameters are compared with the precise experimental data
obtained at the Z pole. Finally, we make some remarks on the perspectives for
the discovery of the Higgs boson, the most important challenge of the Standard
Model.


title: Possible Cosmological Implications of the Quark-Hadron Phase Transition

abstract:
  We study the quark-hadron phase transition within an effective model of QCD,
and find that in a reasonable range of the main parameters of the model, bodies
with quark content between $10^{-2}$ and 10 solar masses can have been formed
in the early universe. In addition, we show that a significant amount of
entropy is released during the transition. This may imply the existence of a
higher baryon number density than what is usually expected at temperatures
above the QCD scale. The cosmological QCD transition may then provide a natural
way for decreasing the high baryon asymmetry created by an Affleck-Dine like
mechanism down to the value required by primordial nucleosynthesis.


title: Cosmological Expansion in the Randall-Sundrum Warped Compactification

abstract:
  The cosmology of a brane-universe embedded in a higher dimensional bulk
spacetime presents some peculiarities not seen in ordinary (3+1) dimensional
gravity. I summarize the current understanding, with emphasis on the suggestion
by Randall and Sundrum that the bulk is 5-D anti-deSitter space, leading to a
solution of the weak scale hierarchy problem.


title:
Top-Antitop Pair Production close to Threshold: Synopsis of recent NNLO
  Results

abstract:
  Using non-relativistic effective theories, new next-to-next-to-leading order
(NNLO) QCD corrections to the total $t\bar t$ production cross section at the
Linear Collider have been calculated recently. In this article the NNLO
calculations of several groups are compared and the remaining uncertainties are
discussed. The theoretical prospects for an accurate determination of top quark
mass parameters are discussed in detail. An outlook on possible future
improvements is given.


title: A QCD Analysis of Polarised Parton Densities

abstract:
  We present the results of a QCD fit to global data on deep-inelastic
polarised lepton-hadron scattering. We find that it is possible to fit the data
with strongly broken SU(2) flavour for the polarised sea densities. This can
easily be tested in $W$ production at polarised RHIC. The data fails to pin
down polarised singlet sea quark and gluon densities. We explore the
uncertainties in detail and show that improvement in statistics, achievable at
polarised HERA for measurement of A_1 at moderately low values of x, have large
payoffs in terms of the improvement in measurement of gluon and sea quark
densities.


title: Vacuum Polarisation Tensors in Constant Electromagnetic Fields: Part I

abstract:
  The string-inspired technique is used for the calculation of vacuum
polarisation tensors in constant electromagnetic fields. In the first part of
this series, we give a detailed exposition of the method for the case of the
QED one-loop N-photon amplitude in a general constant electromagnetic
background field. The two-point cases are calculated explicitly, leading to
compact representations for the constant field vacuum polarisation tensors for
both scalar and spinor QED.


title: Some Astrophysical Implications of Compact Extra Dimensions

abstract:
  There have been many suggestions that there are extra spatial dimensions
"outside" of our normal (3+1)-dimensional space. Generally it is assumed that
electromagnetic and hadronic fields are restricted to the normal dimensions,
while gravity can extend into the extra dimensions. Thus a hadron or lepton is
confined in a potential well, and excited states should exist. I explore the
possibility that ordinary hadrons and leptons have excited states
("compactons"), some of which may have electromagnetism and possibly gravity
confined to the extra spatial dimensions. Some of these may be long-lived. If
sufficiently long-lived, relic compactons may exist as dark matter. Black holes
may be the source of new particles with bizarre properties that appear as UHE
cosmic rays.


title: The use of early data on B --> rho pi decays

abstract:
  This paper reviews the Dalitz plot analysis for the decays $B^0(\bar B^0) \to
\rho \pi \to \pi^+ \pi^- \pi^0$. We discuss what can be learned about the ten
parameters in this analysis from untagged and from tagged time-integrated data.
We find that, with the important exception of the interesting CP violating
quantity $\alpha$, the parameters can be determined from this data sample --
and, hence, they can be measured at CLEO as well as at the asymmetric $B$
factories. This suggests that the extraction of $\alpha$ from the
time-dependent data sample can be accomplished with a smaller data sample (and,
therefore, sooner) than would be required if all ten parameters were to be
obtained from that time-dependent data sample alone. We also explore bounds on
the shift of the true angle $\alpha$ from the angle measured from charged
$\rho$ final states alone. These may be obtained prior to measurements of the
parameters describing the neutral $\rho$ channel, which are expected to be
small.


title: Intermediate-Mass Dileptons at the CERN-SpS and RHIC

abstract:
  The significance of thermal dilepton radiation at intermediate invariant
masses (1GeV<M<3GeV) in ultrarelativistic heavy-ion collisions is investigated.
At CERN-SpS energies, a consistent explanation of the excess observed by NA50
can be given. At RHIC energies the thermal signal is dominated by early
emission indicative for QGP formation. Chemical under-saturation effects and
the competition with open-charm contributions are addressed.


title: Vortex phases in condensed matter and cosmology

abstract:
  Placing a high-Tc superconductor in an increasing external magnetic field,
the flux first penetrates the sample through an Abrikosov vortex lattice, and
then a first order transition is observed by which the system goes to the
normal phase. We discuss the cosmological motivation for considering the
electroweak phase transition in the presence of an external magnetic field, the
analogies this system might have with the superconductor behaviour described
above, and in particular whether at large physical Higgs masses, corresponding
to the high-Tc regime, an analogue of the vortex phase and an associated first
order phase transition could be generated.


title: Present knowledge of the Cabibbo-Kobayashi-Maskawa matrix

abstract:
  A complete review of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements and
of the experimental methods for their determination is presented. A critical
analysis of the relevant experimental results, and in particular of the most
recent ones, allows to improve the accuracies of all the matrix elements. A
chi-square minimization with the three-family unitarity constraint on the CKM
matrix is performed to test the current interpretation of the CP violating
phenomena inside the Standard Model. A complete and unambiguous solution
satisfying all the imposed constraints is found. As a by-product of the fit,
the precision on the values of the matrix elements is further increased and it
is possible to obtain estimates for the important CP violation observables $sin
2\beta$, $sin 2\alpha$ and $\gamma$. Finally, an independent estimation of the
CKM elements based on a Bayesian approach is performed. This complementary
method constitutes a check of the results obtained, providing also the
probability functions of the CKM elements and of the related quantities.


title: Non-equilibrium dynamics of hot Abelian Higgs model

abstract:
  The real-time dynamics of finite-temperature gauge theories can be
approximated, to leading-order accuracy in the coupling constants, by a
classical field theory with the hard thermal loop Lagrangian. I show how this
approach can be used in numerical lattice simulations to study dynamics of the
Abelian Higgs model in or slightly out of equilibrium.


title:
The static QCD potential in coordinate space with quark masses through
  two loops

abstract:
  The potential between infinitely heavy quarks in a color singlet state is of
fundamental importance in QCD. While the confining long distance part is
inherently non-perturbative, the short-distance (Coulomb-like) regime is
accessible through perturbative means. In this paper we present new results of
the short distance potential in coordinate space with quark masses through two
loops. The results are given in explicit form based on reconstructed solutions
in momentum space in the Euclidean regime. Thus, a comparison with lattice
results in the overlap region between the perturbative and non-perturbative
regime is now possible with massive quarks. We also discuss the definition of
the strong coupling based on the force between the static sources.


title: Baryogenesis and Degenerate Neutrinos

abstract:
  We bring the theoretical issue of whether two important cosmological demands,
baryon asymmetry and degenerate neutrinos as hot dark matter, can be compatible
in the context of the seesaw mechanism. To realize leptogenesis with almost
degenerate Majorana neutrinos without severe fine-tuning of parameters, we
propose the hybrid seesaw mechanism with a heavy Higgs triplet and right-handed
neutrinos. Constructing a minimal hybrid seesaw model with SO(3) flavor
symmetry for the neutrino sector, we show that the mass splittings for the
atmospheric and solar neutrino oscillations which are consistent with the
requirements for leptogenesis can naturally arise.


title:
Predictions on $B \to \pi \bar{l} \nu_l$, $D \to \pi \bar{l} \nu_l$ and
  $D\to K \bar{l} \nu_l$ from QCD Light-Cone Sum Rules

abstract:
  The $f^+$ form factors of the $B\to \pi$, $D\to \pi$ and $D\to K$ transitions
are calculated from QCD light-cone sum rules (LCSR) and used to predict the
widths and differential distributions of the exclusive semileptonic decays
$B\to \pi \bar{l}\nu_l$, $D \to\pi \bar{l}\nu_l$ and $D \to K \bar{l}\nu_l$,
where $l=e,\mu$. The current theoretical uncertainties are estimated. The LCSR
results are found to agree with the results of lattice QCD calculations and
with experimental data on exclusive semileptonic D decays. Comparison of the
LCSR prediction on $B\to \pi \bar{l} \nu_l$ with the CLEO measurement yields a
value of |V_{ub}| in agreement with other determinations.


title: Flavor Structure and Supersymmetric CP-Violation

abstract:
  In this talk, we address the possibility of finding supersymmetry through
indirect searches in the K and B systems. We prove that, in the absence of the
Cabibbo-Kobayashi-Maskawa phase, a general Minimal Supersymmetric Standard
Model with all possible phases in the soft-breaking terms, but no new flavor
structure beyond the usual Yukawa matrices, can never give a sizeable
contribution to $\epsilon_K$, $\epsilon^\prime/\epsilon$ or hadronic B^0 CP
asymmetries. However, Minimal Supersymmetric models with additional flavor
structures in the soft-supersymmetry breaking terms can produce large
deviations from the Standard Model predictions. Hence, observation of
supersymmetric contributions to CP asymmetries in B decays would be the first
sign of the existence of new flavor structures in the soft-terms and would hint
at a non-flavor blind mechanism of supersymmetry breaking.


title: Casimir scaling as a test of QCD vacuum

abstract:
  Recent accurate measurements of static potentials between sources in various
representations of the gauge group SU(3) performed by G.Bali provide a crucial
test of the QCD vacuum models and different approaches to confinement. The
Casimir scaling of the potential observed for all measured distances implies
strong suppression of higher cumulant contributions. The consequences for the
instanton vacuum model and the spectrum of the QCD string are also discussed.


title:
On Electroweak Baryogenesis in Gauge Mediated Models with
  Messenger-Matter Mixing

abstract:
  We consider feasibility of electroweak baryogenesis in gauge mediated
supersymmetry breaking models with messenger-matter mixing. We present a class
of models where electroweak baryogenesis produces sufficient amount of baryon
asymmetry. The main features of these models are ({\it i}) large mixing between
messengers and right stop and ({\it ii}) fairly narrow region of viable
$\tan\beta$.


title: Baryogenesis at Low Reheating Temperatures

abstract:
  We note that the maximum temperature during reheating can be much greater
than the reheating temperature $T_r$ at which the Universe becomes radiation
dominated. We show that the Standard Model anomalous $(B+L)$-violating
processes can therefore be in thermal equilibrium for 1 GeV $\simlt T_{r}\ll
100$ GeV. Electroweak baryogenesis could work and the traditional upper bound
on the Higgs mass coming from the requirement of the preservation of the baryon
asymmetry may be relaxed. Alternatively, the baryon asymmetry may be
reprocessed by sphaleron transitions either from a $(B-L) $ asymmetry generated
by the Affleck-Dine mechanism or from a chiral asymmetry between $e_R$ and
$e_L$ in a $B-L = 0$ Universe. Our findings are also relevant to the production
of the baryon asymmetry in large extra dimension models.


title: Weak-Singlet Fermions: Models and Constraints

abstract:
  We employ data from precision electroweak tests and collider searches to
derive constraints on the possibility that weak-singlet fermions mix with the
ordinary Standard Model fermions. Our findings are presented within the context
of a theory with weak-singlet partners for all ordinary fermions and theories
in which only third-generation fermions mix with weak singlets. In addition, we
indicate how certain results can be applied more widely in theories containing
exotic fermions.


title: Enhanced Global Symmetry Constraints on epsilon Terms

abstract:
  Recently it has been proposed that the physical spectrum of a vector-like
gauge field theory may exhibit an enhanced global symmetry near a
chiral/conformal phase transition. The new symmetry is related to the
possibility, supported by various investigations, that a parity-doubled
spectrum develops as the number of fermions Nf is increased to a critical value
above which it is expected that the symmetric phase is restored.
  We show that parity-doubling together with the associated enhanced global
symmetry severely constrains the epsilon terms of the effective Lagrangian
involving Goldstone bosons as well as massive spin-1 particles. We extend our
analysis to underlying fermions in pseudo-real representations of the gauge
group.


title:
CP violating Z t anti-t and gamma t anti-t Couplings at a Future e+ e-
  Collider

abstract:
  The effect of new operators that give rise to CP-violating couplings of the
type $Z t \bar{t}$ and $\gamma t \bar{t}$ are examined at future electron
positron Linear Colliders (FLC). The impact of these CP-violating interactions
over Standard Model predictions was studied for the process e+ e^- -> t anti-t
with the subsequent decays t -> b l+ nu_l and anti-t -> anti-b l- anti-nu_l,
called as dilepton mode, and t -> b l^+ nu_l and anti-t -> anti-b anti-q q' or
t -> b q anti-q' and anti-t -> anti-b l- anti-nu_l, called as single lepton
mode, where the final leptons are l = e or mu, and the final quarks are q(q')=
u(d) or c(s). Polarized electron beam and CP observables and asymmetries are
used to impose bounds on the anomalous couplings.


title: Testing kappa-Poincare' with neutral kaons

abstract:
  In recent work on experimental tests of quantum-gravity-motivated
phenomenological models, a significant role has been played by the so-called
``$\kappa$'' deformations of Poincar\'e symmetries. Sensitivity to values of
the relevant deformation length $\lambda$ as small as $5 \cdot 10^{-33}m$ has
been achieved in recent analyses comparing the structure of $\kappa$-Poincar\'e
symmetries with data on the gamma rays we detect from distant astrophysical
sources. We investigate violations of CPT symmetry which may be associated with
$\kappa$-Poincar\'e in the physics of the neutral-kaon system. A simple
estimate indicates that experiments on the neutral kaons may actually be more
$\lambda$-sensitive than corresponding astrophysical experiments, and may
already allow to probe values of $\lambda$ of order the Planck length.


title: Large Mixing Angle MSW Solution in S_3 Flavor Symmetry

abstract:
  We have investigated phenomenological implications on the neutrino flavor
mixings in the $S_{3L}\times S_{3R}$ symmetric mass matrices including symmetry
breaking terms. We have shown how to get the large mixing angle MSW solution,
$\sin^2 2 \th_\odot=0.65\sim 0.97$ and $\Delta m_{\odot}^2= 10^{-5}\sim
10^{-4}\eV^2$, in this model. It is found that the structure of the lepton mass
matrix in our model is stable against radiative corrections although the model
leads to nearly degenerate neutrinos.


title: Lambda and Lambda-bar polarization in polarized DIS

abstract:
  We consider the polarization of Lambda + Lambda-bar baryons produced in
polarized Deep Inelastic Scattering at leading order, with various spin
configurations: longitudinally polarized leptons and unpolarized nucleon;
unpolarized leptons and longitudinally or transversely polarized nucleons;
longitudinally polarized leptons and nucleons. We show how the different
results in the different cases are related to different aspects of the
elementary dynamics and to the spin properties of the distribution and
fragmentation functions and show how a combined analysis might give useful
information. We give numerical results according to several sets of polarized
fragmentation functions recently proposed.


title: The chiral effective pion-nucleon Lagrangian of order p^4

abstract:
  We construct the minimal effective chiral pion-nucleon SU(2) Lagrangian at
fourth order in the chiral expansion. The Lagrangian contains 118 in principle
measurable terms. We develop both the relativistic as well as the heavy baryon
formulation of the effective field theory. For the latter, we also work out
explicitly all 1/m corrections at fourth order. We display all relevant
relations needed to find the linearly independent terms.


title:
Further investigation of a relic neutralino as a possible origin of an
  annual-modulation effect in WIMP direct search

abstract:
  We analyze the annual-modulation effect, measured by the DAMA Collaboration
with the new implementation of a further two-years running, in the context of a
possible interpretation in terms of relic neutralinos. We impose over the set
of supersymmetric configurations, selected by the annual-modulation data, the
constraints derived from WIMP indirect measurements, and discuss the features
of the ensuing relic neutralinos. We critically discuss the sources of the main
theoretical uncertainties in the analysis of event rates for direct and
indirect WIMP searches.


title: Generation of large flavor mixing from radiative corrections

abstract:
  We provide a model independent criterion which would guarantee a large flavor
mixing of two quasi-degenerate Majorana neutrinos at the low scale,
irrespective of the mixing at the high scale. We also show that such a
situation is realizable for a phenomenologically interesting range of
parameters of the weak scale theory. We further show that for a similar
condition to be implementable for the three generation case, the CP parity of
one of the neutrinos needs to be opposite to that of the others.


title: Neutrino masses, mixing and oscillations

abstract:
  These are lectures given at the CERN-JINR school on high energy physics. The
possibilities of the mixing of massive Dirac and Majorana neutrinos are
discussed. The theory of neutrino oscillations in vacuum is presented. The
trasitions between differen flavor neutrinos in matter are discussed. A short
review of the results of the neutrino oscillation experiments is provided.


title: QCD forces and heavy quark bound states

abstract:
  The present knowledge of QCD confining forces between static test charges is
summarised, with an emphasis on lattice results. Recent developments in
relating QCD potentials to quarkonium properties by use of effective field
theory methods are presented. The validity of non-relativistic QCD and the
adiabatic approximation with respect to heavy quark bound states is explored.
Besides the static potential and relativistic correction terms, the spectra of
glueballs and gluinoballs, hybrid excitations of the QCD flux tube between
fundamental colour sources, potentials between charges in various
representations of the SU(3) gauge group, and multi-particle interactions are
discussed. Some implications for quarkonia systems and quark-gluon hybrid
mesons are drawn.


title: CP Violation Beyond the Standard Model in Hadronic B Decays

abstract:
  In this talk I discuss three different methods, using B_d to J/psi K_S, J/psi
K_s pi^o, B_d to K^- pi^+, pi^+ pi^- and B_u to K^- pi^0, bar K^0 pi^- pi^-
pi^0, to extract hadronic model independent information about new physics.


title: CP violation in psi(2S) -> J/psi pi pi processes

abstract:
  We propose to search for CP-violating effects in the decay
psi(2S)->J/psi+pi+pi. The scheme has the advantage that one does not need to
track two or more CP-conjugate processes. Model independent amplitudes are
derived for this purpose. The fact that leading CP violating terms are O(k)
under low energy expansion and the processes are flavor disconnected make the
measurement of these CP breaking parameters practical. Our results can be
extended to the case of Upsilon(2S)->Upsilon(1S)+pi+pi and
Upsilon(3S)->Upsilon(2S)+pi+pi straightforwardly.


title:
Enhanced Structure Function Of The Nucleon From Deep Inelastic
  Electron-Proton Scattering

abstract:
  The proton structure function is re-deduced from the data of deep inelastic
electron-proton scattering after enhanced correction that is made due to the
multiple scattering effect. The Glauber approach is used to account for the
multiple scattering of electron with the quark constituents of the proton. The
results are compared with the prediction of the parton model. Appreciable
deviation is observed only at low values of the Bjorken scaling, which
correspond to the extremely deep inelastic scattering.


title:
Perturbative calculation of the scaled factorial moments in second-order
  quark-hadron phase transition within the Ginzburg-Landau description

abstract:
  The scaled factorial moments $F_q$ are studied for a second-order
quark-hadron phase transition within the Ginzburg-Landau description. The role
played by the ground state of the system under low temperature is emphasized.
After a local shift of the order parameter the fluctuations are around the
ground state, and a perturbative calculation for $F_q$ can be carried out.
Power scaling between $F_q$'s is shown, and a universal scaling exponent
$\nu\simeq 1.75$ is given for the case with weak correlations and weak
self-interactions.


title: Determining the CP violating phase $\gamma$

abstract:
  We review several methods for determining the Kobayashi-Maskawa phase
$\gamma={\rm Arg} V^*_{ub}$ from rate and CP asymmetry measurements in hadronic
B decays. We focus on the processes $B\to DK, B_s\to D_s K$, and on charmless
decays to two light pseudoscalars and decays to a pair of a pseudoscalar and a
vector meson. Theoretical uncertainties underlying these methods are discussed.


title:
The Nonperturbative Color Meissner Effect in a Two-Flavor Color
  Superconductor

abstract:
  Color superconductivity in QCD breaks the SU(3) color gauge group down to
SU(2), inducing masses in five of the eight gluons. This is a dynamical Higgs
effect, in which the diquark condensate acts as the vacuum expectation value of
a composite scalar field. In order to analyze this effect at low quark density,
when gaps are large and generated nonperturbatively, we use instanton-induced
quark interactions augmented with gauge-invariant interactions between quarks
and perturbative gluons. The five gluon masses are found from the static limit
of the relevant polarization operators, in which transversality is maintained
via the Nambu-Goldstone modes of broken color symmetry. Working in the
microscopic theory we calculate these masses to one-loop order and estimate
their density dependence. Finally, we speculate that the Meissner effect may
postpone the onset of color superconductivity to higher matter density than
estimated previously.


title: Physics Needs for Future Accelerators

abstract:
  Contents:
  1. Prologomena to any meta future physics
  1.1 Physics needs for building future accelerators
  1.2 Physics needs for funding future accelerators
  2. Physics questions for future accelerators
  2.1 Crimes and misapprehensions
  2.1.1 Organized religion 2.1.2 Feudalism 2.1.3 Trotsky was right
  2.2 The Standard Model as an effective field theory
  2.3 What is the scale of new physics?
  2.4 What could be out there?
  2.5 Model-independent conclusions
  3. Future accelerators
  3.1 What is the physics driving the LHC?
  3.2 What is the physics driving the LC?
  3.2.1 Higgs physics is golden
  3.2.2 LHC won't be sufficient to unravel the new physics as the TeV scale
  3.2.3 LC precision measurements can pin down new physics scales
  3.3 Why a Neutrino Factory?
  3.4 Pushing the energy frontier


title: Oblique Parameter Constraints on Large Extra Dimensions

abstract:
  We consider the Kaluza-Klein scenario in which gravity propagates in the
$4+n$ dimensional bulk of spacetime and the Standard Model particles are
confined to a 3-brane. We calculate the gauge boson self-energy corrections
arising from the exchange of virtual gravitons and present our results in the
$STU$-formalism. We find that the new physics contributions to $S$, $T$ and $U$
decouple in the limit that the string scale $M_S$ goes to infinity. The oblique
parameters constrain the lower limit on $M_S$. Taking the quantum gravity
cutoff to be $M_S$,
  $S$-parameter constraints impose $M_S>1.55$ TeV for $n=2$ at the 1$\sigma$
level. $T$-parameter constraints impose $M_S>1.25 (0.75)$ TeV for $n=3 (6)$.


title: Calculation of Direct CP Violation in B Decays

abstract:
  Using the generalized factorization approach, we calculate the CP asymmetries
of charmless B decays. A number of decay channels has large CP asymmetries,
which can be measured in the B factories.


title: Probe of CP Violation in e+e- -> ttbar Near Threshold

abstract:
  We study how to probe the anomalous CP-violating couplings of top quark with
photon, Z and gluon in the ttbar threshold region at future e+e- colliders.
These couplings contribute to the difference of the t and tbar polarization
vectors delta P and to the CP-odd spin correlation tensor delta Q_ij. We find
that typical sizes of delta P and delta Q_ij are 5-20% times the couplings
(d_tgamma, d_tZ, d_tg) in the threshold region. Experimentally delta P can be
measured efficiently using the CP-odd combination of the l+/l- momenta or of
the l+/l- directions. We have similar sensitivities to both the real and
imaginary parts of the couplings independently using the two components of
delta P. Taking advantage of different dependences of delta P on the e+/e-
polarizations and on the c.m. energy, we will be able to disentangle the
effects of the three couplings d_tgamma, d_tZ, d_tg in the ttbar threshold
region. We give rough estimates of sensitivities to the anomalous couplings
expected at future e+e- colliders. The sensitivities to d_tgamma and d_tZ are
comparable to those attainable in the open-top region at e+e- colliders. The
sensitivity to d_tg is worse than that expected at a hadron collider but
exceeds the sensitivity in the open-top region at e+e- colliders.


title: Mediation of Supersymmetry Breaking via Anti-Generation Fields

abstract:
  In the context of the weakly coupled heterotic string, we propose a new model
of mediating supersymmetry breaking. The breakdown of supersymmetry in the
hidden sector is transmitted to anti-generation fields via gravitational
interactions. Subsequent transmission of the breaking to the MSSM sector occurs
via gauge interactions. It is shown that the mass spectra of superparticles are
phenomenologically viable.


title: Model-independent determination of |V_{ub}|

abstract:
  The decay distribution of the kinematic variable \xi_u in inclusive charmless
semileptonic decays of B mesons is unique. The novel method for a
model-independent determination of |V_{ub}| is described.


title: Strangeness Form Factors of the Proton in the Chiral Quark Model

abstract:
  The chiral quark model describes the strangeness components of the light
quarks as fluctuations into strange mesons and quarks. The single strange
pseudoscalar and vector meson loop fluctuations of the constituent $u$- and
$d$-quarks give rise to only very small strangeness form factors for the
proton. This result is in line with recent experimental results, given their
wide uncertainty range.


title: Light Meson Spectroscopy: Recent Developments and DAFNE

abstract:
  In this contribution I discuss recent developments in light meson
spectroscopy, and note specific areas in which DAFNE is an especially
appropriate tool for future experiments. One topic of special relevance is the
spectroscopy of excited vector mesons; quite narrow vector hybrids are
predicted by the flux-tube model, which could be produced by DAFNE when
operating in the $M_{e^+e^-}\approx 1.5-2$ GeV range. A second topic, which
would be appropriate for a later date because it requires a rather higher beam
energy, is the production of C=(+) mesons in $\gamma\gamma$ collisions.


title:
Loop-after-loop contribution to the second-order Lamb shift in
  hydrogenlike low-Z atoms

abstract:
  We present a numerical evaluation of the loop-after-loop contribution to the
second-order self-energy for the ground state of hydrogenlike atoms with low
nuclear charge numbers Z. The calculation is carried out in the Fried-Yennie
gauge and without an expansion in Z \alpha. Our calculation confirms the
results of Mallampalli and Sapirstein and disagrees with the calculation by
Goidenko and coworkers. A discrepancy between different calculations is
investigated. An accurate fitting of the numerical results provides a detailed
comparison with analytic calculations based on an expansion in the parameter Z
\alpha. We confirm the analytic results of order \alpha^2 (Z\alpha)^5 but
disagree with Karshenboim's calculation of the \alpha^2 (Z \alpha)^6 \ln^3(Z
\alpha)^{-2} contribution.


title: The most energetic particles in the universe

abstract:
  Several issues related to the lensing of ultra-high energy cosmic rays by the
Galactic magnetic field are discussed.


title:
Lambda polarization and single-spin left-right asymmetry in diffractive
  hadron-hadron collisions

abstract:
  We discuss Lambda polarization and single-spin left-right asymmetry in
diffractive hadron-hadron scattering at high energies. We show that the
physical picture proposed in a recent Letter is consistent with the
experimental observation that $\Lambda$ polarization in the diffractive
process, $pp\to \Lambda K^+p$, is much higher than that in the inclusive
reaction, $pp\to \Lambda X$. We make predictions for the left-right asymmetry,
A_N, and for the spin transfer, $D_{NN}^\Lambda$, in the single-spin process
$p(\uparrow)p\to \Lambda K^+p$ and suggest further experimental tests of the
proposed picture.


title:
Single spin asymmetries in inclusive high energy hadron-hadron collision
  processes

abstract:
  It has been realized for quite a long time that single-spin experiments, in
which one of the colliding objects is transversely polarized, can be helpful in
studying the properties of strong interaction in general and in testing Quantum
Chromodynamics (QCD) in particular.
  Striking effects have been observed in the past few years which deviate
drastically from the expectation of the perturbative QCD parton model.
  These effects have received much attention.
  New experiments of the similar type are underway and/or planned.
  Different theoretical attempts have been made to understand these effects.
  In this review, the special role played by singly polarized high-energy
hadron-hadron collisions in High Energy Spin Physics is emphasized.
  Characteristics of the available data for inclusive hadron productions are
briefly summarized.
  Different theoretical approaches for such processes are reviewed with special
attention to a non-perturbative model which explicitly takes the orbital motion
of the valence quarks and hadronic surface effects into account.
  The connection between such asymmetries and hyperon polarization in
unpolarized reactions is discussed.
  An example of the possible application of such experimental results in other
processes is given.


title: Search for Ambient Neutralino Dark Matter at Accelerator

abstract:
  We investigate the possibility of using accelarator beam particles to collide
with the ambient neutralino dark matter particles in cosmic rays as a way to
search for the cold dark matter. We study in detail its inelastic and elastic
scattering with the projectile particles at electron-positron colliders and
discuss the possible experimental signals and the relevent background.


title:
Partonic structure of pi and rho mesons from data on hard
  (semi)exclusive production of two pions off nucleon

abstract:
  We fitted the pi-pi mass distribution in the range 0.5 < mpipi < 1.1 GeV
measured in hard exclusive positron-proton reactions at HERA by the form
dictated by QCD at leading twist level. Extracted parameters are related to
valence quark distribution in the pion, and to the pion and rho meson
distribution amplitudes. We obtain, for the first time, a measurement of the
second Gegenbauer coefficient of the rho meson distribution amplitude:
$a_2^{(\rho)}= -0.10\pm 0.20 $ for a photon virtuality of <Q^2>=21.2 GeV^2.


title: Non-abelian discrete gauge symmetries and inflation

abstract:
  Obtaining a potential flat enough to provide slow roll inflation is often
difficult when gravitational effects are included. Non-abelian discrete gauge
symmetries can guarantee the flatness of the inflaton potential in this case,
and also provide special field values where inflation can end.


title: Introduction to B Physics

abstract:
  These lectures provide an introduction to various topics in heavy-flavor
physics. We review the theory and phenomenology of heavy-quark symmetry,
exclusive weak decays of $B$ mesons, inclusive decay rates, and some rare $B$
decays.


title: Fat Brane Phenomena

abstract:
  Gravitons could permeate extra space dimensions inaccessible to all other
particles, which would be confined to ``branes''. We point out that these
branes could be ``fat'' and have a non-vanishing width in the dimensions
reserved for gravitons. In this case the other particles, confined within a
finite width, should have ``branon'' excitations. Chiral fermions behave
differently from bosons under dimensional reduction, and they may --or may
not-- be more localized than bosons. All these possibilities are in principle
testable and distinguishable, they could yield spectacular signatures at
colliders, such as the production of the first branon excitation of $\gamma$'s
or $Z$'s, decaying into their ground state plus a quasi-continuum of graviton
recurrences. We explore these ideas in the realm of a future lepton collider
and we individuate a {\it dimensiometer}: an observable that would cleanly
diagnose the number of large ``extra'' dimensions.


title:
Compact Hyperbolic Extra Dimensions: Branes, Kaluza-Klein Modes and
  Cosmology

abstract:
  We reconsider theories with low gravitational (or string) scale M_* where
Newton's constant is generated via new large-volume spatial dimensions, while
Standard Model states are localized to a 3-brane. Utilizing compact hyperbolic
manifolds (CHM's) we show that the spectrum of Kaluza-Klein (KK) modes is
radically altered. This allows an early universe cosmology with normal
evolution up to substantial temperatures, and completely negates the
constraints on M_* arising from astrophysics. Furthermore, an exponential
hierarchy between the usual Planck scale and the true fundamental scale of
physics can emerge with only order unity coefficients. The linear size of the
internal space remains small. The proposal has striking testable signatures.


title: Mirror Neutrinos and the Early Universe

abstract:
  I review the construction of the Exact Parity or Mirror Matter Model and
explain how it solves the solar and atmospheric neutrino problems. The
oscillation driven relic neutrino asymmetry amplification phenomenon is then
used to demonstrate the consistency of the model with Big Bang Nucleosynthesis.


title:
Determination of the quantum part of the truly nonperturbative
  Yang-Mills vacuum energy density in the covariant gauge QCD

abstract:
  Using the effective potential approach for composite operators, we have
formulated a general method of calculation of the truly nonperturbative
Yang-Mills vacuum energy density in the covariant gauge QCD ground state
quantum models. It is defined as an integration of the truly nonperturbative
part of the full gluon propagator over the deep infrared region (soft momentum
region). A nontrivial minimization procedure makes it possible to determine the
value of the soft cutoff in terms of the corresponding nonperturbative scale
parameter, which is inevitably present in any nonperturbative model for the
full gluon propagator. We have shown for specific models of the full gluon
propagator explicitly that the use of the infrared enhanced and finite gluon
propagators lead to the vacuum energy density which is finite, always negative
and it has no imaginary part (stable vacuum), while the infrared vanishing
propagators lead to unstable vacuum and therefore they are physically
unacceptable.


title: Gravitino production in hybrid inflationary models

abstract:
  It has been recently shown that it is possible to excite gravitinos in an
expanding background due to a time varying scalar field oscillating at the
bottom of the inflationary potential. The two components of the gravitino,
namely helicity 1/2 and helicity 3/2, are excited differently due to the
presence of different time varying mass scales in the problem. In this paper we
analyse the production of both the helicities in a multi-chiral scenario, in
particular focusing on a general model of hybrid inflation. Fermion production
in hybrid models is very much different from that of the chaotic models
discussed so far in the literature. In this paper we give a full account of
gravitino production analytically and numerically. It is noticed that the
creation of gravitinos does not take place in the first few oscillations of the
inflaton field, rather the production is a gradual and delayed process. It
takes roughly 30-40 oscillations to build up the production and for the
saturation to take place it can even take longer time, depending on the model
parameters. We give an estimation of the reheat temperature and a brief
discussion upon back-reaction on the fermionic production, which could change
the gravitino abundance.


title: Understanding Fields Using Strings: A Review for Particle Physicists

abstract:
  In addition to being a prime candidate for a fundamental unified theory of
all interactions in nature, string theory provides a natural setting to
understand gauge field theories. This is linked to the concept of "D-branes":
extended, solitonic excitations of string theory which can be studied using
techniques of string theory and which support gauge fields localized along
their world-volumes. It follows that the techniques of string theory can be
very useful even for those particle physicists who are not specifically
interested in unification and/or quantum gravity. In this talk I attempt to
review how strings help us to understand fields. The discussion is restricted
to 3+1 spacetime dimensions.


title:
Effect of anomalous tbW vertex on decay-lepton distributions in e+e- ->
  t tbar and CP-violating asymmetries

abstract:
  We obtain analytic expressions for the energy and polar-angle double
differential distributions of a secondary lepton l+ (l-) arising from the decay
of t (tbar) in e+e- -> t tbar with an anomalous tbW decay vertex. We also
obtain analytic expressions for the various differential cross sections with
the lepton energy integrated over. In this case, we find that the angular
distributions of the secondary lepton do not depend on the anomalous coupling
in the decay, regardless of possible anomalous couplings occurring in the
production amplitude for e+e- -> t tbar. Our study includes the effect of
longitudinal e- and e+ beam polarization. We also study the lepton energy and
beam polarization dependence of certain CP-violating lepton angular asymmetries
arising from an anomalous tbW decay vertex and compare them with the
asymmetries arising due to CP violation in the production process due to the
top electric or weak dipole moment.


title: Theory of radiative B decays

abstract:
  Theory of charmless radiative B decays is reviewed. Existence of uncontrolled
non-perturbative effects in the inclusive rate at O(alpha_s) is reminded.


title:
Production of transverse energy from minijets in next-to-leading order
  perturbative QCD

abstract:
  We compute in next-to-leading order (NLO) perturbative QCD the transverse
energy carried into the central rapidity unit of hadron or nuclear collisions
by the partons freed in the few-GeV subcollisions. The formulation is based on
a rapidity window and a measurement function of a new type. The behaviour of
the NLO results as a function of the minimum transverse momentum and as a
function of the scale choice is studied. The NLO results are found to be stable
relative to the leading-order ones even in the few-GeV domain.


title: Stabilization of internal spaces in multidimensional cosmology

abstract:
  Effective 4-dimensional theories are investigated which were obtained under
dimensional reduction of multidimensional cosmological models with a minimal
coupled scalar field as matter source. Conditions for the internal space
stabilization are considered and the possibility for inflation in the external
space is discussed. The electroweak as well as the Planck fundamental scale
approaches are investigated and compared with each other. It is shown that
there exists a rescaling for the effective cosmological constant as well as for
gravitational exciton masses in the different approaches.


title: Weak decay of uniformly accelerated protons and related processes

abstract:
  We investigate the weak interaction emission of spin-1/2 fermions from
accelerated currents. As particular applications, we analyze the decay of
uniformly accelerated protons and neutrons, and the neutrino-antineutrino
emission from uniformly accelerated electrons. The possible relevance of our
results to astrophysics is also discussed.


title: Bottom quark electroproduction in variable flavor number schemes

abstract:
  Two variable flavor number schemes are used to describe bottom quark
production in deep inelastic electron-proton scattering. In these schemes the
coefficient functions are derived from mass factorization of the heavy quark
coefficient functions presented in a fixed flavor number scheme. Also one has
to construct a parton density set with five light flavors (u,d,s,c,b) out of a
set which only contains four light flavors (u,d,s,c). In order $\alpha_s^2$ the
two sets are discontinuous at $\mu=m_b$ which follows from mass factorization
of the heavy quark coefficient functions when it is carried out in the ${\bar
{\rm MS}}$-scheme. Both variable flavor number schemes give almost identical
predictions for the bottom structure functions $F_{2,b}$ and $F_{L,b}$. Also
they both agree well with the corresponding results based on fixed order
four-flavor perturbation theory over a wide range in $x$ and $Q^2$.


title: The Quantum Boltzmann Equation in a Nontrivial Background

abstract:
  This talk is a status report on our study of quantum transport equations
relevant for baryogenesis computations. Our main finding is that, as a
consequence of localization in space, the quasiparticle picture of the plasma
dynamics breaks down at first non-trivial order in gradient expansion. While in
this talk we focus on bosons, we expect that a similar picture holds for
fermions. We then argue that the quasiparticle picture is recovered in the
adiabatic limit of frequent scattering.


title: Non perturbative renormalization group potentials and quintessence

abstract:
  New solutions to the non perturbative renormalization group equation for the
effective action of a scalar field theory in the Local Potential Approximation
having the exponential form $e^{\pm\phi}$ are found. This result could be
relevant for those quintessence phenomenological models where this kind of
potentials are already used, giving them a solid field theoretical derivation.
Other non perturbative solutions, that could also be considered for the
quintessence scenario, are also found. Apart from this particular cosmological
application, these results could be relevant for other models where scalar
fields are involved, in particular for the scalar sector of the standard model.


title:
Hadronic Light-Cone Wavefunctions and the Unification of QCD Bound-State
  Phenomena

abstract:
  The light-cone Fock representation encodes the bound-state quark and gluon
properties of hadrons, including their helicity and flavor correlations, in
terms of universal process-independent and frame-independent wavefunctions. It
also provides a physical factorization scheme for separating hard and soft
contributions in both exclusive and inclusive hard processes. A new type of jet
production reaction, ''self-resolving diffractive interactions'' can provide
direct information on the light-cone wavefunctions of hadrons in terms of their
QCD degrees of freedom as well as the composition of nuclei in terms of their
nucleon and mesonic degrees of freedom.


title: The proton and the photon, who is probing whom in electroproduction?

abstract:
  The latest results on the structure of the proton and the photon as seen at
HERA are reviewed while discussing the question posed in the title of the talk.


title:
Convergence of the expansion of the Laplace-Borel integral in
  perturbative QCD improved by conformal mapping

abstract:
  The optimal conformal mapping of the Borel plane was recently used to
accelerate the convergence of the perturbation expansions in QCD. In this work
we discuss the relevance of the method for the calculation of the Laplace-Borel
integral expressing formally the QCD Green functions. We define an optimal
expansion of the Laplace-Borel integral in the principal value prescription and
establish conditions under which the expansion is convergent.


title: Bilepton Resonance in Electron-Electron Scattering

abstract:
  Theoretical backgound for bileptonic gauge bosons is reviewed, both the
SU(15) GUT model and the 3-3-1 model. Mass limits on bileptons are discussed
coming from $e^+e^-$ scattering, polarized muon decay and muonium-antimuonium
conversion. Discovery in $e^-e^-$ at a linear collider at low energy (100GeV)
and high luminosity ($10^{33}/cm^2/s$) is emphasised.}


title:
$B\to X_s\tau^+\tau^-$ in a CP spontaneously broken two Higgs doublet
  model

abstract:
  The differential branching ratio, CP asymmetry and lepton polarization $P_N$
for $B\to ^M X_s\tau^+\tau^-$ in a CP spotaneously broken two Higgs doublet
model are compute d. ^M It is shown that contributions of neutral Higgs bosons
to the decay are ^M quite significant when $\tan\beta$ is large and $P_N$ can
reach five persent.


title:
Baryon Diffusion Constant in Hot and Dense Hadronic Matter Based on an
  Event Generator Urasima

abstract:
  We generate the statistical ensembles in equilibrium with fixed temperature
and chemical potential by imposing periodic boundary condition to the
simulation of URASiMA(Ultra-Relativistic AA collision Simulator based on
Multiple Scattering Algorithm). By using the generated ensembles, we
investigate the temperature dependence and the chemical potential dependence of
the nucleon diffusion constant of a dense and hot hadronic matter.


title: TeV Emission by Ultra-High Energy Cosmic Rays in Nearby, Dormant AGNs

abstract:
  The curvature radiation produced by particles accelerating near the event
horizon of a spinning supermassive black hole, threaded by externally supported
magnetic field lines is considered. It is shown that light nuclei suffer
catastrophic curvature losses that limit the maximum energy they can attain to
values well below that imposed by the maximum potential difference induced by
the black hole dynamo, unless the curvature radius of magnetic field lines
largely exceeds the gravitational radius. It is further shown that the dominant
fraction of the rotational energy extracted from the black hole is radiated in
the TeV band. Given the observed flux of ultra-high energy cosmic rays, and the
estimated number of nearby supermassive black holes, it is expected that if
dormant AGNs are the sources of UHECRs, as proposed recently by Boldt & Ghosh,
then they should also be detectable at TeV energies by present TeV experiments.


title: Leptogenesis with "Fuzzy Mass Shell" for Majorana Neutrinos

abstract:
  We study the mixing of elementary and composite particles. In quantum field
theory the mixing of composite particles originates in the couplings of the
constituent quarks and for neutrinos in self-energy diagrams. In the event that
the incoming and outgoing neutrinos have different masses, the self-energy
diagrams vanish because energy is not conserved but the finite decaying widths
make the mixing possible. We can consider the neutrinos to be "fuzzy" states on
their mass shell and the mixing is understood as the overlap of two
wavefunctions. These considerations restrict the mass difference to be
approximately equal to or smaller than the largest of the two widths: abs(M_i -
M_j) lessorequal max(Gamma_i, Gamma_j).


title: Limits on a Composite Higgs Boson

abstract:
  Precision electroweak data are generally believed to constrain the Higgs
boson mass to lie below approximately 190 GeV at 95% confidence level. The
standard Higgs model is, however, trivial and can only be an effective field
theory valid below some high energy scale characteristic of the underlying
non-trivial physics. Corrections to the custodial isospin violating parameter T
arising from interactions at this higher energy scale dramatically enlarge the
allowed range of Higgs mass. We perform a fit to precision electroweak data and
determine the region in the (m_H, Delta T) plane that is consistent with
experimental results. Overlaying the estimated size of corrections to T arising
from the underlying dynamics, we find that a Higgs mass up to 500 GeV is
allowed. We review two composite Higgs models which can realize the possibility
of a phenomenologically acceptable heavy Higgs boson. We comment on the
potential of improvements in the measurements of m_t and M_W to improve
constraints on composite Higgs models.


title:
Strong and electromagnetic decays of p-wave heavy baryons $\Lambda_{c1},
  \Lambda^*_{c1}$

abstract:
  We first calculate the binding energy, the pionic and electromagnetic couping
constants of the lowest lying p-wave heavy baryon doublet $\Lambda_{c1}$,
$\Lambda_{c1}^*$ in the leading order of the heavy quark expansion. Then we
calculate the two-body decay widths with these couplings and compare our
results with other approaches. Our results are $\Gamma (\Lambda_{c1}\to
\Sigma_c \pi, \Sigma_c \gamma, \Sigma^*_c \gamma) =2.7, 0.011, 0.001$ MeV and
$\Gamma (\Lambda^*_{c1}\to \Sigma_c \pi, \Sigma_c \gamma, \Sigma^*_c \gamma,
\Lambda_{c1} \gamma) =33, 5, 6, 0.014$ keV respectively. We find $\Lambda_{c1},
\Lambda^*_{c1}\to \Lambda_c \gamma$ is strictly forbidden in the leading order
of the heavy quark expansion. At the order of ${\cal O} (1/m_c)$ their widths
are $36, 48$ keV respectively.


title: Signature for heavy Majorana neutrinos in hadronic collisions

abstract:
  The production and decay of new possible heavy Majorana neutrinos are
analyzed in hadronic collisions. New bounds on the mixing of these particles
with standard neutrinos are estimated according to a fundamental representation
suggested by grand unified models. A clear signature for these Majorana
neutrinos is given by same-sign dileptons plus a charged weak vector boson in
the final state. We discuss the experimental possibilities for the future Large
Hadron Collider (LHC) at CERN.


title: Future B Experiments from The BTeV/LHC-b Perspective

abstract:
  Many measurements are necessary in the program of studying mixing, CP
violation and rare decays of b and c quarks. These measurements require large
numbers of B^o, B_s, B^- and D^{*+} hadrons. Fortunately, copius production of
particles containing b and c quarks will occur at Tevatron and the LHC. The
crucial measurements are described here, as well as the design of the two
experiments, LHC-b and BTeV, that can exploit the 4-20 x 10^{11} b hadrons
produced every 10^7 seconds.


title:
Effects of a general set of interactions on neutrino propagation in
  matter

abstract:
  This talk is based on the article hep-ph/9903517 written in collaboration
with Sven Bergmann and Yuval Grossman. An analysis of the effective potential
for neutrino propagation in matter, assuming a generic set of Lorentz invariant
non-derivative interactions is presented. In addition to vector and axial
vector couplings, also tensor interactions can give coherent effects if the
medium is polarized, and the components of a tensor potential transverse to the
direction of neutrino propagation can induce a neutrino spin-flip.


title: Experimental signature of a fermiophobic Higgs boson

abstract:
  The most general Two Higgs Doublet Model potential without explicit CP
violation depends on 10 real independent parameters . Excluding spontaneous CP
violation results in two 7 parameter models. Although both models give rise to
5 scalar particles and 2 mixing angles, the resulting phenomenology of the
scalar sectors is different. If flavour changing neutral currents at tree level
are to be avoided, one has four alternative ways of introducing the fermion
couplings in both cases. In one of these models the mixing angle of the CP even
sector can be chosen in such a way that the fermion couplings to the lightest
scalar Higgs boson vanishes. At the same time it is possible to suppress the
fermion couplings to the charged and pseudo-scalar Higgs boson by appropriately
choosing the mixing angle of the CP odd sector. We investigate the
phenomenology of both models in the fermiophobic limit and present the
different branching ratios for the decays of the scalar particles. We use the
present experimental results from the LEP collider to constrain the models.


title: Automatic Feynman diagram calculation with xloops--a short overview

abstract:
  xloops is a program package that calculates Feynman diagrams by using
computer algebra systems. In this paper it is shown which problems to be solved
by computer algebra arise during such calculations, and how this problems are
handled in the framework of xloops.


title:
Is it possible to determine the S-factor of the hep process from a
  laboratory experiment?

abstract:
  We discuss the problem of solar hep neutrinos originating from the reaction p
+ 3He -> 4He + e+ + nu and obtain a relation between the astrophysical S-factor
of the hep process and the cross section of the process e- + 4He -> 3H + n + nu
near threshold. The relation is based on the isotopic invariance of strong
interactions.
  The measurement of the latter cross section would allow to obtain
experimental information on S(hep), the value of which, at the moment, is known
only from theoretical calculations.