title:
Universality, the QCD critical/tricritical point and the quark number
  susceptibility

abstract:
  The quark number susceptibility near the QCD critical end-point (CEP), the
tricritical point (TCP) and the O(4) critical line at finite temperature and
quark chemical potential is investigated. Based on the universality argument
and numerical model calculations we propose a possibility that the hidden
tricritical point strongly affects the critical phenomena around the critical
end-point. We made a semi-quantitative study of the quark number susceptibility
near CEP/TCP for several quark masses on the basis of the
Cornwall-Jackiw-Tomboulis (CJT) potential for QCD in the improved-ladder
approximation. The results show that the susceptibility is enhanced in a wide
region around CEP inside which the critical exponent gradually changes from
that of CEP to that of TCP, indicating a crossover of different universality
classes.


title: Flavor issues in the Higgs sector

abstract:
  We discuss the conditions under which the flavor structure of SUSY model
induces, either radiatively or through mixing, new flavor-violating
interactions in the Higgs sector. The radiative flavor mediation mechanism is
illustrated using the minimal SUSY extension of the SM (MSSM) with generic
trilinear A-terms, and applied to evaluate the corrections to Lepton
Flavor-Violating (LFV) and Flavor-Conserving (LFC) Higgs vertices. Flavor
mediation through mixing is discussed within the context of an $E_6$-inspired
multi-Higgs model, suplemented with an abelian flavor symmetry. Tevatron and
LHC can probe the flavor structure of these models through the detection of the
LFV Higgs mode h->tau mu, while NLC can perform high-precision tests of the LFC
mode h ->tau+ tau-.


title:
Neutral Higgs boson contributions to the decays B_{d,s}->mu^+ mu^- in
  the MSSM at large tan[beta]

abstract:
  It is well known that the Minimal Supersymmetric Standard Model (MSSM) can
enhance Br[B_{d,s}->mu^+ mu^-] by orders of magnitude, even if we assume the
Cabibbo-Kobayashi-Maskawa (CKM) matrix to be the only source of flavour
violation. Of particular interest is the quantity R=Br[B_d->mu^+
mu^-]/Br[B_s->mu^+ mu^-], since (i) the theoretical errors cancel to a large
extent, and (ii) it offers a theoretically clean way of extracting the ratio
|V_{td}/V_{ts}| in the Standard Model, which predicts R_SM ~ |V_{td}/V_{ts}|^2
\~ O(10^{-2}). Exploring three different scenarios of modified minimal flavour
violation, we find that part of the MSSM parameter space can accommodate large
B_{d,s}->mu^+ mu^- branching fractions, while being consistent with various
experimental constraints. More importantly, we show that the ratio R can be as
large as O(1), while the individual branching fractions may be amenable to
detection by ongoing experiments. We conclude that within the MSSM with large
tan[beta] the decay rates of B_{d,s}->mu^+ mu^- be of comparable size even in
the case where flavour violation is due solely to the CKM matrix.


title:
Precision measurement of the hadronic cross-section through the
  radiative return method

abstract:
  Electron--positron annihilation into hadrons plus an energetic photon from
initial-state radiation allows the hadronic cross-section to be measured over a
wide range of energies at high luminosity meson factories. Weighted integrals
over this cross-section are a decisive input for electroweak precision tests. A
Monte Carlo event generator called PHOKHARA has been developed, which simulates
$e^+ e^- \to$ hadrons + photon(s) at the NLO accuracy. The latest tests and
upgrades are presented in this paper.


title: Extended Anomaly Mediation and New Physics at 10 TeV

abstract:
  In the MSSM, an unfortunate prediction of minimal anomaly mediated
supersymmetry breaking is that the slepton masses squared are negative. This
problem is particularly intractable because of the insensitivity of anomaly
mediation to ultraviolet physics. In this paper we note that tree level
couplings to the conformal compensator in the Kahler potential give 10 TeV as a
natural mass scale for physics beyond the MSSM, and, moreover, that the SUSY
breaking effects from physics at this scale do not generically decouple from
the low-energy spectrum. We consider particular extensions, including the
effects of vector-like matter at 10 TeV, and a specific model in which the
leptons are placed in a triplet of an asymptotically free SU(3). We find that
the features of minimal anomaly mediation are not a robust prediction of the
general framework, and that the problem of negative slepton masses squared can
easily be avoided.


title: $B \to D^{(*)}$ form factors in perturbative QCD

abstract:
  We calculate the $B\to D^{(*)}$ form factors in the heavy-quark and
large-recoil limits in the perturbative QCD framework based on $k_T$
factorization theorem, assuming the hierachy $M_B\gg M_{D^{(*)}}\gg
\bar\Lambda$, with the $B$ meson mass $M_B$, the $D^{(*)}$ meson mass
$M_{D^{(*)}}$, and the heavy meson and heavy quark mass difference
$\bar\Lambda$. The qualitative behavior of the light-cone $D^{(*)}$ meson wave
function and the associated Sudakov resummation are derived. The leading-power
contributions to the $B\to D^{(*)}$ form factors, characterized by the scale
$\bar\Lambda\sqrt{M_B/M_{D^{(*)}}}$, respect the heavy-quark symmetry. The
next-to-leading-power corrections in $1/M_B$ and $1/M_{D^{(*)}}$, characterized
by a scale larger than $\sqrt{\bar\Lambda M_B}$, are estimated to be less than
20%. The $D^{(*)}$ meson wave function is determined from the fit to the
observed $B\to D^{(*)} l\nu$ decay spectrum, which can be employed to make
predictions for nonleptonic decays, such as $B\to D^{(*)}\pi(\rho)$.


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

abstract:
  Recent work on analytical solutions to the MSW equations for three neutrino
flavours is reviewed, with emphasis on the exponential density. Application to
a particular mass matrix, proposed by Lehmann, Newton and Wu, is also
discussed. Within this model, the experimental data allow a determination of
the three neutrino masses. They are found to be 0.002-0.004, 0.01 and 0.05 eV.


title: Unitarity Triangle: 2002 and Beyond

abstract:
  We describe the present status of the Unitarity Triangle and we give an
outlook for its future determinations. We discuss new sets of fundamental
flavour parameters and comment briefly on new physics beyond the Standard
Model.


title: Dynamics of the scalar field in 5-dimensional Kaluza-Klein theory

abstract:
  Using the language of differential forms, the Kaluza-Klein theory in 4+1
dimensions is derived. This theory unifies electromagnetic and gravitational
interactions in four dimensions when the extra space dimension is compactified.
Without any ad-hoc assumptions about the five-dimensional metric, the theory
also contains a scalar field coupled to the other fields. By a conformal
transformation the theory is transformed from the Jordan frame to the Einstein
frame where the physical content is more manifest. Including a cosmological
constant in the five-dimensional formulation, it is seen to result in an
exponential potential for the scalar field in four dimensions. A similar
potential is also found from the Casimir energy in the compact dimension. The
resulting scalar field dynamics mimics realistic models recently proposed for
cosmological quintessence.


title: Radiative decays: a new flavour filter

abstract:
  Radiative decays of the $1^3D_1$ orbital excitations of the $\rho$, $\omega$
and $\phi$ to the scalars $f_0(1370)$, $f_0(1500)$ and $f_0(1710)$ are shown to
provide a flavour filter, clarifying the extent of glueball mixing in the
scalar states. A complementary approach to the latter is provided by the
radiative decays of the scalar mesons to the ground-state vectors $\rho$,
$\omega$ and $\phi$. Discrimination among different mixing scenarios is strong.


title: Event Generators - New Developments

abstract:
  After an introduction to event generators we give an overview of developments
in the field of joining matrix elements with parton showers. Starting with
matrix element corrections, we also discuss implementations that match LO and
NLO matrix elements with parton shower results correctly. Finally, the new
Monte Carlo program Herwig++ is described. We report on its status of
development and some major physics improvements.


title: The NJL model and strange quark matter

abstract:
  The stability of strange quark matter is studied within the Nambu
Jona-Lasinio model with three different parameter sets. The model Lagrangian
contains 4-fermion (with and without vector interaction) and 6-fermion terms;
the minimum energy per baryon number as a function of the strangeness fraction
of the system is compared to the masses of hyperons having the same strangeness
fraction, and coherently calculated in the same version of the model, and for
the same parameter set. The results show that in none of the different
parameter sets strangelets are stable, and in some cases a minimum in the
energy per baryon does not even exist.


title: Black hole and brane production in TeV gravity: A review

abstract:
  In models with large extra dimensions particle collisions with center-of-mass
energy larger than the fundamental gravitational scale can generate
non-perturbative gravitational objects such as black holes and branes. The
formation and the subsequent decay of these super-Planckian objects would be
detectable in particle colliders and high energy cosmic ray detectors, and have
interesting implications in cosmology and astrophysics. In this paper we
present a review of black hole and brane production in TeV-scale gravity.


title: Can supercooling explain the HBT puzzle?

abstract:
  Possible hadronization of supercooled QGP, created in heavy ion collisions at
RHIC and SPS, is discussed within a Bjorken hydrodynamic model. Such a
hadronization is expected to be a very fast shock-like process, what, if
hadronization coincides or shortly followed by freeze out, could explain a part
of the HBT puzzle, i.e. the flash-like particle emission
($R_{out}/R_{side}\approx 1$). HBT data also show that the expansion time
before freeze out is very short ($\sim 6-10 fm/c$). In this work we discuss
question of supercooled QGP and the timescale of the reaction.


title:
Single Spin Asymmetry in Open Charm Photoproduction and Decay as a Test
  of pQCD

abstract:
  We analyze the possibility of measuring the single spin asymmetry (SSA) in
open charm production by linearly polarized photons in the planned E160/E161
experiments at SLAC using the inclusive spectra of secondary (decay) leptons.
In leading order pQCD, the SSA in the azimuthal distribution of the charged
decay lepton is predicted to be about 0.2 for SLAC kinematics. Our calculations
show that the SSA in the decay lepton distribution is well defined in pQCD: it
is stable both perturbatively and parametrically, and practically insensitive
to theoretical uncertainties in the charm semileptonic decays. Nonperturbative
contributions to the leptonic SSA due to the gluon transverse motion in the
target, heavy quark fragmentation and Fermi motion of the $c$-quark inside the
$D$-meson are predicted to be about 10%. We conclude that measurements of the
azimuthal asymmetry in the secondary lepton distribution would provide a good
test of the applicability of pQCD to open charm production at energies of fixed
target experiments. Our analysis of the SLAC experimental conditions shows that
this SSA can be measured in E160/E161 with an accuracy of about ten percent.


title:
The Collider Phenomenology of Technihadrons in the Technicolor Straw Man
  Model

abstract:
  We discuss the phenomenology of the lightest SU(3)_C singlet and non-singlet
technihadrons in the Straw Man Model of low-scale technicolor (TCSM). The
technihadrons are assumed to be those arising in topcolor--assisted technicolor
models in which topcolor is broken by technifermion condensates. We improve
upon the description of the color--singlet sector presented in our earlier
paper introducing the TCSM (hep-ph/9903369). These improvements are most
important for subprocess energies well below the masses of the technirho and
techniomega, and, therefore, apply especially to e+e- colliders such as LEP and
a low--energy linear collider. In the color--octet sector, we consider mixing
of the gluon, the coloron V_8 from topcolor breaking, and four isosinglet
color--octet technirho mesons. We assume, as expected in walking technicolor,
that these technirhos decay into qbar-q, gg, and g-technipion final states, but
not into technipion pairs. All the TCSM production and decay processes
discussed here are included in the event generator Pythia. We present several
simulations appropriate for the Tevatron Collider, and suggest benchmark model
lines for further experimental investigation.


title: Evaluating matrix elements relevant to some Lorenz violating operators

abstract:
  Carlson, Carone and Lebed have derived the Feynman rules for a consistent
formulation of noncommutative QCD. The results they obtained were used to
constrain the noncommutativity parameter in Lorentz violating noncommutative
field theories. However, their constraint depended upon an estimate of the
matrix element of the quark level operator (gamma.p - m) in a nucleon. In this
paper we calculate the matrix element of (gamma.p - m), using a variety of
confinement potential models. Our results are within an order of magnitude
agreement with the estimate made by Carlson et al. The constraints placed on
the noncommutativity parameter were very strong, and are still quite severe
even if weakened by an order of magnitude.


title: Construction of a robust warm inflation mechanism

abstract:
  A dissipative mechanism is presented, which emerges in generic interacting
quantum field systems and which leads to robust warm inflation. An explicit
example is considered, where using typical parameter values, it is shown that
considerable radiation can be produced during inflation. The extension of our
results to expanding spacetime also is discussed.


title: New physics scales and anomalous magnetic moment

abstract:
  Violation of chiral symmetry together with change of mass sign allows a
linear correction in inverse power of new physics scale to the anomalous
magnetic moment of muon. In this light we analyse alternative models showing in
particular that grand unification, supersymmetry and muon substructure may
explain the discrepancy between the experimental value of the muon anomaly and
the standard model calculation.


title:
Predictions of the Generalized Glauber Model for the coherent
  $\rho$-production at RHIC and the STAR data

abstract:
  We calculate the rapidity distribution and the total cross section of
coherent and incoherent $\rho$-production in the heavy ion ultraperipheral
collisions (UPC) at $\surd s_{NN}=130$ GeV using the generalized vector
dominance model(GVDM) and the Gribov- Glauber approach. We find the coherent
cross section of $\rho $-production $\sigma_{coh}=490$ mb compared to the
$\sigma_{coh}=370\pm 170\pm 80$ mb recently reported by the STAR collaboration
at RHIC. The predicted cross section inside the acceptance of the experiment,
$|y|\le 1$, agrees with the data. It is emphasized that measurements of the
rapidity distribution will provide a much more stringent test of the model.


title:
Current in the light-front Bethe-Salpeter formalism I: Replacement of
  non-wave function vertices

abstract:
  We apply the light-front reduction of the Bethe-Salpeter equation to matrix
elements of the electromagnetic current between bound states. Using a simple
(1+1)-dimensional model to calculate form factors, we focus on two cases. In
one case, the interaction is dominated by a term instantaneous in light-cone
time. Here effects of higher Fock states are negligible and the form factor can
be effectively expressed using non-wave function vertices and crossed
interactions. If the interaction is not instantaneous, non-wave function
vertices are replaced by contributions from higher Fock states. These higher
Fock components arise from the covariant formalism via the energy poles of the
Bethe-Salpeter vertex and the electromagnetic vertex. The replacement of
non-wave function vertices in time-ordered perturbation theory is a theorem
which directly extends to generalized parton distributions, e.g., in (3+1)
dimensions.


title: Current in the light-front Bethe-Salpeter formalism II: Applications

abstract:
  We pursue applications of the light-front reduction of current matrix
elements in the Bethe-Salpeter formalism. The normalization of the reduced wave
function is derived from the covariant framework and related to non-valence
probabilities using familiar Fock space projection operators. Using a simple
model, we obtain expressions for generalized parton distributions that are
continuous. The non-vanishing of these distributions at the crossover between
kinematic regimes (where the plus component of the struck quark's momentum is
equal to the plus component of the momentum transfer) is tied to higher Fock
components. Moreover continuity holds due to relations between Fock components
at vanishing plus momentum. Lastly we apply the light-front reduction to
time-like form factors and derive expressions for the generalized distribution
amplitudes in this model.


title: Process gamma* gamma -> sigma at large virtuality of gamma*

abstract:
  The process gamma* gamma -> sigma is investigated in the framework of the
SU(2)xSU(2) chiral NJL model. The form factor of the process is derived for
arbitrary virtuality of gamma* in the Euclidean kinematic domain. The
asymptotic behaviour of this form factor resembles the asymptotic behaviour of
the gamma* gamma -> pi form factor.


title:
Statistical Hadronization as a Snapshot of a dynamical Fireball
  Evolution

abstract:
  Statistical hadronization models are extremly succesful in describing
measured ratios of hadrons produced in heavy-ion collisions for a wide range of
beam energies from SIS to RHIC. Using the idea of statistical hadronization at
the phase boundary within the framework of a recently proposed dynamical model
for the thermodynamics of fireballs, we establish a relation between the
equation of state (EoS) in the partonic phase probed at the phase transition
temperature T_C and the measured hadron ratios. In this way, the ratios can be
predicted parameter-free. We demonstrate that this framework gives a consistent
description of conditions both at SPS and RHIC. As the data on dilepton
emission from heavy ion collisions give evidence for strong in-medium
modifications of hadronic properties, we schematically investigate the
sensitivity of our results to such modifications and qualitatively sketch a
consistent scenario involving such in-medium effects.


title:
Measurement of Trilinear Gauge Couplings at a gamma-gamma and e-gamma
  Collider

abstract:
  The processes gamma gamma -> WW and e gamma -> nu W are sensitive to triple
gauge boson interactions. Both reactions have been simulated for hadronically
decaying W-bosons and the sensitivity to anomalous couplings has been
estimated.


title: Spectrum and Regge-trajectories in QCD

abstract:
  Starting in sixties an active group of physicists under the guidance of Prof.
K.A.Ter-Martirosyan was creating the theory of high-energy processes in QCD.
  From the beginning the key element of this theory is the notion of Regge
trajectories and in particular of the pomeron trajectory, which have been
introduced phenomenologically. In this talk I review the problem of spectrum
and Regge trajectories as it can be derived from the nonperturbative QCD
dynamics.


title:
Inelastic J/psi production at HERA in the colour singlet model with
  k_T-factorization

abstract:
  In the framework of k_T-factorization QCD approach and the colour singlet
model we consider J/\psi inelastic photo- and leptoproduction processes at
HERA. We investigate the dependences of the single differential and double
differential cross section on different forms of the unintegrated gluon
distribution. The z and p_T dependences of the spin aligment parameter \alpha
are presented also. Our theoretical predictions agree well with recent data
taken by the H1 and ZEUS collaborations at HERA. It is shown that experimental
study of the polarization J/\psi mesons at low Q^2 < 1 GeV^2 is an additional
test of BFKL gluon dynamics.


title:
$S=-1$ Meson-Baryon Unitarized Coupled Channel Chiral Perturbation
  Theory and the $S_{01}-$ $\Lambda$(1405) and $- \Lambda$(1670) Resonances

abstract:
  The $s-$wave meson-baryon scattering is analyzed for the strangeness $S=-1$
and isospin I=0 sector in a Bethe-Salpeter coupled channel formalism
incorporating Chiral Symmetry. Four channels have been considered: $\pi
\Sigma$, $\bar K N$, $\eta \Lambda$ and $K \Xi$. The required input to solve
the Bethe-Salpeter equation is taken from lowest order Chiral Perturbation
Theory in a relativistic formalism. There appear undetermined low energy
constants, as a consequence of the renormalization of the amplitudes, which are
obtained from fits to the $\pi\Sigma\to\pi\Sigma$ mass-spectrum, to the elastic
$\bar K N \to \bar K N$ and $ \bar K N\to \pi \Sigma$ $t$--matrices and to the
$ K^- p \to \eta \Lambda$ cross section data. The position and residues of the
complex poles in the second Riemann Sheet of the scattering amplitude determine
masses, widths and branching ratios of the $S_{01}-$ $\Lambda$(1405) and
$-\Lambda$(1670) resonances, in reasonable agreement with experiment. A good
overall description of data, from $\pi \Sigma$ threshold up to 1.75 GeV, is
achieved despite the fact that three-body channels have not been explicitly
included.


title: On the definition and observability of the neutrino charge radius

abstract:
  We present a brief summary of recent results concerning the unambiguous
definition and experimental extraction of the gauge-invariant and
process-independent neutrino charge radius.


title:
Exclusive electroproduction of lepton pairs as a probe of nucleon
  structure

abstract:
  We suggest the measurement of exclusive electroproduction of lepton pairs as
a tool to study inter-parton correlations in the nucleon via generalized parton
distributions in the kinematical region where this process is light-cone
dominated. We demonstrate how the single beam-spin asymmetry allows to perform
such kind of analysis and give a number of predictions for several experimental
setups. We comment on other observables which allow for a clean separation of
different species of generalized parton distributions.


title: Search for new physics in $B_{d,s}\to l^+l^-$

abstract:
  An overview of recent theoretical developments in rare leptonic B decays is
given. New physics effects on branching ratio and CP violation in the decays
are analyzed in models beyond SM (supersymmetric models and two Higgs doublet
models).


title:
Quantum effects to the Higgs boson self-couplings in the SM and in the
  MSSM

abstract:
  We show that the effects of heavy Higgs particles and heavy top-squarks in
the one-loop self-couplings of the lightest CP-even MSSM Higgs boson decouple
from the low energy theory when the self-couplings are expressed in terms of
the Higgs boson mass M_h0. Our conclusion is that the h^0 self-interactions
become very close to those of the SM Higgs boson and, therefore, MSSM quantum
effects could only be revealed by very high precision experiments.


title:
Mirror matter admixtures in \Omega^- two body non-leptonic decays and
  the \Delta I = 1/2 rule

abstract:
  We extend our previous analysis of mirror matter admixtures to reproduce the
|\Delta I|=1/2 rule predictions in the decays \Omega^-\to\Xi^-\pi^0,
\Omega^-\to\Xi^0\pi^-, and \Omega^-\to\Lambda K^-. The results are
satisfactory, lending credibility to the possibility that the enhancement
phenomenon may be attributed to such admixtures.


title: Analytic Approaches to Kaon Physics

abstract:
  Most of the analytic approaches which are used at present to understand the
low energy hadronic interactions in Particle Physics, get their inspiration
from QCD in the limit of a large number of colors $N_c$. I first illustrate
this with the example of the left--right correlation function which is an
excellent theoretical laboratory. Next, I present the list of observables which
have been computed using a large--$N_c$ QCD approach. Finally, I discuss in
some detail examples which are relevant to lattice QCD, in the sense that we
can make comparisons.


title: Virtual graviton exchanges at the Z-pole in large extra dimensions

abstract:
  In the framework of quantum gravity propagating in large extra dimensions,
the effects of virtual Kaluza-Klein gravitons on the imaginary part of the
amplitude of the process e+ e- --> f f-bar are analyzed at the Z-pole. Notably,
the interference of the almost-continuous spectrum of the KK gravitons with the
standard model resonant amplitude is finite and predictable in terms of the
fundamental D-dimensional Plank scale M_D. We find that, while the
virtual-gravitons effect on total cross sections vanishes at tree-level, both
angular and polarization asymmetries are modified by terms whose relative
effect is at most of order 10^(-4) for M_D > 1 TeV. Possible shifts in the M_Z,
due to changes in the Breit-Wigner line shape are also discussed.


title:
Heavy Quark Parameters and Vcb from Spectral Moments in Semileptonic B
  Decays

abstract:
  We extract the heavy quark masses and non-perturbative parameters from the
Delphi preliminary measurements of the first three moments of the charged
lepton energy and hadronic mass distributions in semileptonic B decays, using a
multi-parameter fit. We adopt two formalisms, one of which does not rely on a
1/mc expansion and makes use of running quark masses. The data are consistent
and the level of accuracy of the experimental inputs largely determines the
present sensitivity. The results allow to improve on the uncertainty in the
extraction of Vcb.


title: Orbifold Breaking of 3-3-1 Model

abstract:
  We study the five dimensional SU(3)_c \times SU(3)_L \times U(1)_X gauge
theory (3-3-1 Model) in which the gauge symmetry is broken down through
orbifold compactification to four dimensions. The new model has several
distinguishing features compared to the usual four dimensional model. We
develop the formalism, and give expressions for the gauge boson masses, mixings
and their couplings to the fermions. Phenomenology of the model is briefly
studied.


title: Status of the N* Program at Jefferson Lab

abstract:
  Recent results from JLab on the electromagnetic excitation of nucleon
resonances are presented, and confronted with theoretical predictions.
Preliminary data in the search for undiscovered states are discussed as well.


title:
Revised $\alpha^4$ term of lepton $g-2$ from the Feynman diagrams
  containing an internal light-by-light scattering subdiagram

abstract:
  The $\alpha^4$ contribution to the lepton $g-2$ from a gauge-invariant set of
18 Feynman diagrams containing a light-by-light scattering subdiagram
internally has been reevaluated by a method independent of the previous
approach. Comparison of two methods revealed a program error in the first
version. Correcting this error, the contributions of these 18 diagrams become
-0.990 72 (10)$(\alpha/\pi)^4$ and -4.432 43 (58)$(\alpha/\pi)^4$ for the
electron and muon $g-2$, respectively. The correction is not large enough to
affect the comparison between theory and experiment for the muon $g-2$, but it
does alter the inferred value for the fine structure constant $\alpha^{-1}$ by
6 ppb.


title: B Physics and CP Violation

abstract:
  After an introduction to the Standard-Model description of CP violation, we
turn to the main focus of these lectures, the B-meson system. Since
non-leptonic B decays play the key role for the exploration of CP violation, we
have to discuss the tools to describe these transitions theoretically before
classifying the main strategies to study CP violation. We will then have a
closer look at the B-factory benchmark modes $B_d\to J/\psi K_S$, $B_d\to\phi
K_S$ and $B_d\to\pi^+\pi^-$, and shall emphasize the importance of studies of
$B_s$ decays at hadron colliders. Finally, we focus on more recent developments
related to $B\to\pi K$ modes and the $B_d\to\pi^+\pi^-$, $B_s\to K^+K^-$
system.


title: Two-loop renormalization of tan(beta) and its gauge dependence

abstract:
  Renormalization of two-loop divergent corrections to the vacuum expectation
values (v_1, v_2) of the two Higgs doublets in the minimal supersymmetric
standard model, and their ratio $\tan\beta=v_2/v_1$, is discussed for general
R_{\xi} gauge fixings. When the renormalized (v_1, v_2) are defined to give the
minimum of the loop-corrected effective potential, it is shown that, beyond the
one-loop level, the dimensionful parameters in the R_{\xi} gauge fixing term
generate gauge dependence of the renormalized $\tan\beta$. Additional shifts of
the Higgs fields are necessary to realize the gauge-independent renormalization
of $\tan\beta$.


title:
Forward-Backward Multiplicity Correlations in Symmetric and Asymmetric
  High Energy Collisions

abstract:
  Forward-backward correlations are explored within the two-component clan
model of multiparticle production. It is found that existing data are well
described, and, in hh collisions, that clans must be allowed to leak particles
from one hemisphere to the other. General formulae given for the symmetric case
are then extended to the asymmetric one, which is relevant for pA and AB
collisions.


title: Large lepton flavour violating signals in supersymmetric particle decays

abstract:
  We study lepton flavour violating signals at a future e+ e- linear collider
within the general MSSM, allowing for the most general flavour structure. We
demonstrate that there is a large region in parameter space with large signals,
while being consistent with present experimental bounds on rare lepton decays
such as mu -> e gamma. In our analysis, we include all possible signals from
charged slepton, sneutrino, neutralino, and chargino production and decay. We
also consider the background from the Standard Model and the MSSM. We find that
in general the signature e tau missing energy is the most pronounced one.


title: micrOMEGAs: recent developments

abstract:
  The program micrOMEGAs that calculates the relic density of the lightest
supersymmetric particle (LSP) in the MSSM is presented. The impact of
coannihilation channels and of higher order corrections to Higgs widths is
stressed. The dependence on the RGE code used to calculate the soft parameters
is also discussed.


title: Bose-Einstein Correlations as correlations of fluctuations

abstract:
  The limitations of the recently proposed new method of numerical modelling of
Bose-Einstein correlations (BEC) are explicitly demonstrated. It is then argued
that BEC should still be considered as emerging from the correlations of
fluctuations, however they have to be modelled first in any Monte Carlo event
generator (MCEG) and not added {\it a posteriori} to the existing output of
some MCEG.


title:
A modified Starobinsky's model of inflation: Anomaly-induced inflation,
  SUSY and graceful exit

abstract:
  We present a model of inflation based on the anomaly-induced effective action
of gravity in the presence of a conformally invariant Hilbert-Einstein term.
Our approach is based on the conformal representation of the fields action and
on the integration of the corresponding conformal anomaly. In contradistinction
to the original Starobinsky's model, inflation can be stable at the beginning
and unstable at the end. The instability is caused by a slowing down of
inflation due to quantum effects associated to the massive fermion fields. In
supersymmetric theories this mechanism can be linked to the breaking of SUSY
and suggests a natural way to achieve graceful exit from the inflationary to
the FLRW phase.


title:
Radiative corrections to single Higgs boson production in e+e-
  annihilation

abstract:
  For energies relevant to future linear colliders, \sqrt{s} >~ 500 GeV, the WW
fusion channel dominates the Higgs boson production cross section e+e- ->
\bar\nu \nu h^0. We have calculated the one-loop corrections to this process
due to fermion and sfermion loops in the context of the MSSM. As a special
case, the contribution of the fermion loops in the SM has also been studied. In
general, the correction is negative and sizeable of the order of 10%, the bulk
of it being due to fermion loops.


title: Cold deconfined matter EOS through an HTL quasi-particle model

abstract:
  Using quasi-particle models, lattice data can be mapped to finite chemical
potential. By comparing a simple and an HTL quasi-particle model, we derive the
general trend that a full inclusion of the plasmon effect will give.


title: Parton saturation and N_part scaling of semi--hard processes in QCD

abstract:
  We argue that the suppression of high p_t hadrons discovered recently in
heavy ion collisions at RHIC may be a consequence of saturation in the Color
Glass Condensate. We qualitatively and semi-quantitatively describe the data,
in particular, the dependence upon the number of nucleon participants. We show
that if parton saturation sets in at sufficiently small energy, then in
nucleus-nucleus collisions at RHIC and LHC energies the cross sections of
semi-hard processes should scale approximately with the number of participants,
N_{part}. Our results provide a possible explanation of both the absence of
apparent jet quenching at SPS energies and its presence at RHIC. Under the same
assumption we predict that in semi--central and central pA (dA) collisions at
collider energies the dependence of semi--hard processes on the number of
participating nucleons of the nucleus will change to \sim (N_{part}^A)^{1/2}.
The forthcoming data on dA collisions will provide a crucial test of this
description.


title:
Mirror matter admixtures and isospin breaking in the \Delta I=1/2 rule
  in \Omega^- two body non-leptonic decays

abstract:
  We discuss a description of \Omega^- two body non-leptonic decays based on
possible, albeit tiny, admixtures of mirror matter in ordinary hadrons. The
\Delta I=1/2 rule enhancement is obtained as a result of isospin symmetry and,
more importantly, the rather large observed deviations from this rule result
from small isospin breaking. This analysis lends support to the possibility
that the enhancement phenomenon observed in low energy weak interactions may be
systematically described by mirror matter admixtures in ordinary hadrons.


title:
Elimination of ambiguities in pion-pion phase shifts using crossing
  symmetry

abstract:
  Roy's equations, which incorporate crossing symmetry of the pion-pion
scattering amplitudes, are used to resolve the present ambiguity between two
solutions for the scalar-isoscalar phase shifts below 1 GeV. It is shown that
the "down-flat" solution satisfies well Roy's equations and consequently
crossing symmetry while the other solution called "up-flat" does not and thus
should be eliminated.


title: Flavour Changing Neutral Higgs Boson Decays from Squark - Gluino Loops

abstract:
  We study the flavour changing neutral Higgs boson decays that can be induced
from genuine supersymmetric particles at the one-loop level and within the
context of the Minimal Supersymmetric Standard Model. We consider all the
possible flavour changing decay channels of the three neutral Higgs bosons into
second and third generation quarks, and focus on the Supersymmetric-QCD
corrections from squark-gluino loops which are expected to provide the dominant
contributions. We assume here the more general hypothesis for flavour mixing,
where there is misalignment between the quark and squark sectors, leading to a
flavour non-diagonal squark mass matrix. The form factors involved, and the
corresponding Higgs partial decay widths and branching ratios, are computed
both analytically and numerically, and their behaviour with the parameters of
the Minimal Supersymmetric Standard Model and with the squark mass mixing are
analyzed in full detail. The large rates found, are explained in terms of the
non-decoupling behaviour of these squark-gluino loop corrections in the
scenario with very large supersymmetric mass parameters. Our results show that
if these decays are seen in future colliders they could provide clear indirect
signals of supersymmetry.


title: High-precision e-expansions of massive four-loop vacuum bubbles

abstract:
  In this paper we calculate at high-precision the expansions in e=(4-D)/2 of
the master integrals of 4-loop vacuum bubble diagrams with equal masses, using
a method based on the solution of systems of difference equations. We also show
that the analytical expression of a related on-shell 3-loop self-mass master
integral contains new transcendental constants made up of complete elliptic
integrals of first and second kind.


title: Taming Asymptotic Strength

abstract:
  Using a simple Asymptotically Strong N=1 Susy SU(2) Gauge theory coupled to a
{\bf{5}}-plet Chiral superfield we demonstrate the plausibility of the `` truly
minimal '' Asymptotically Strong Grand Unification scenario proposed by us
recently. Assuming a dynamical superpotential consistent with the symmetries
and anomalies is actually induced non-perturbatively we show the gauge symmetry
is dynamically and spontaneously broken at a UV scale that is generically
{\it{exponentially}} larger than the scales characteristic of the effective low
energy theory. The pattern of condensates in a semi-realistic SU(5) ASGUT is
analyzed using the Konishi anomaly assuming condensation occurs as shown by our
toy model. The necessarily complementary relation of ASGUTs to the Dual
Unification program and the novel cosmogony implied by their unusual
thermodynamic properties are also discussed.


title: Localization and anomalies on orbifolds

abstract:
  In this talk we discus some properties of supersymmetric theories on
orbifolds in five dimensions. The structure of FI--tadpoles may lead to
(strong) localization of charged bulk scalars. Orbifold theories may suffer
from various kinds of anomalies. The parity anomaly may render the construction
of the orbifold theory ill--defined. The gauge anomaly on the orbifold are
localized at the fixed points, which can sometimes be canceled by a
Chern--Simons term.


title: SUSY Dark Matter: Closing The Parameter Space

abstract:
  We consider here the constraints in SUGRA models on the SUSY parameter space
due to current experimental bounds on the light Higgs mass m_h, the b-> s gamma
decay, the amount of neutralino cold dark matter Omega h^2, and the muon
magnetic moment. Models with universal soft breaking (mSUGRA) and non-universal
gaugino or Higgs masses at M_G are examined. For mSUGRA, the m_h, b->s gamma
and Omega h^2 constraints imply a lower bound on the gaugino mass of
m_{1/2}>~300GeV implying the gluino and squarks have mass >~700GeV, and the
neutralino >~120GeV. The current status of the Brookhaven muon g - 2 experiment
is reviewed, and if the Standard Model (SM) contribution evaluated using the
e^+ + e^- data is correct, a 2 sigma bound on the deviation of experiment from
the SM produces an upper bound on m_{1/2} that eliminates the "focus point"
regions of parameter space. Dark matter (DM) detection cross sections range
from 5\times10^{-8} pb to 5\times10^{-10} pb which would be accessible to
future planned detectors. The SUSY decay B_s->\mu^+ +\mu^- is seen to be
accessible to the Tevatron Run 2B with 15 fb^{-1} luminosity for tanbeta >~30.
The most favorable signals of SUSY for linear colliders are stau pair
production and neutralino pair production, though it will require an 800GeV
machine to cover the full parameter space. Non-universal models can modify some
of the above results. Thus a non-universal (heavier) gluino mass at M_G can
significantly reduce the lower bound constraints of b\to s gamma and m_h giving
rise to a lighter SUSY spectrum. A heavier up Higgs mass can open an additional
region with allowed relic density arising from annihilation via the s-channel Z
diagram with an O(10) larger DM detector cross section.


title: Use of Taus in ATLAS

abstract:
  At the LHC, new particles can be expected that decay to final states
involving taus. Examples are given from simulations by the ATLAS experiment
showing how such final states can be exploited.


title:
Deeply Virtual Compton Scattering at Jefferson Lab, Results and
  Prospects

abstract:
  Recent results from the Deeply Virtual Compton Scattering (DVCS) program at
Jefferson Lab will be presented. Approved dedicated DVCS experiments at 6 GeV
and plans for the 12 GeV upgrade will be discussed.


title: Models of Neutrino Masses: Anarchy versus Hierarchy

abstract:
  We present a quantitative study of the ability of models with different
levels of hierarchy to reproduce the solar neutrino solutions, in particular
the LA solution. As a flexible testing ground we consider models based on
SU(5)xU(1)_F. In this context, we have made statistical simulations of models
with different patterns from anarchy to various types of hierachy: normal
hierarchical models with and without automatic suppression of the 23
(sub)determinant and inverse hierarchy models. We find that, not only for the
LOW or VO solutions, but even in the LA case, the hierarchical models have a
significantly better success rate than those based on anarchy. The normal
hierachy and the inverse hierarchy models have comparable performances in
models with see-saw dominance, while the inverse hierarchy models are
particularly good in the no see-saw versions. As a possible distinction between
these categories of models, the inverse hierarchy models favour a maximal solar
mixing angle and their rate of success drops dramatically as the mixing angle
decreases, while normal hierarchy models are far more stable in this respect.


title: Quantitative evolution of global strings from the Lagrangian viewpoint

abstract:
  We clarify the quantitative nature of the cosmological evolution of a global
string network, that is, the energy density, peculiar velocity, velocity
squared, Lorentz factor, formation rate of loops, and emission rate of
Nambu-Goldstone bosons, based on a new type of numerical simulation of scalar
fields in Eulerian meshes. We give a detailed explanation of a method to
extract the above-mentioned quantities to characterize string evolution by
analyzing scalar fields in Eulerian meshes from a Lagrangian viewpoint. We
confirm our previous claim that the number of long strings per horizon volume
in a global string network is smaller than in the case of a local string
network by a factor of $\sim$10 even under cosmological situations, and its
reason is clarified.


title:
The technique of inverse Mellin transform for processes occurring in a
  background magnetic field

abstract:
  We develop the technique of inverse Mellin transform for processes occurring
in a background magnetic field. We show by analyticity that the energy
(momentum) derivatives of a field theory amplitude at the zero energy
(momentum) is equal to the Mellin transform of the absorptive part of the
amplitude. By inverting the transform, the absorptive part of the amplitude can
be easily calculated. We apply this technique to calculate the photon
polarization function in a background magnetic field.


title: Newly observed two-body decays of B mesons in a hybrid perspective

abstract:
  In consistency with the b --> c type of (quasi) two body decays, recently
observed two body decays of B mesons are studied in a hybrid perspective in
which their amplitude is given by a sum of factorizable and non-factorizable
ones, and a role of the latter in these decays are discussed.


title: Thermal Dilepton Radiation from Finite Fireball

abstract:
  We analyze the dilepton emission rates from the hot pion gas confined to a
finite space-time volume. Two models of pion(+) pion(-) annihilation to
dileptons are under consideration. The first model mimics an extreme influence
of the dense hadron environment on the rho-meson mean free path and mean life
time. The second model deals with the standard concept of vector meson
dominance when the hadron medium is not accounted. Our results indicate that
the dilepton rates are finite in the low invariant mass region M<2m_\pi. It is
found that the rates experience an enhancement in the electron-positron
production when invariant mass tends to the "real" threshold M=2m_e. The
breaking of the detailled energy-momentum conservation in favour of the
integral one due to broken translation invariance is discussed.


title: Hadronic light-by-light scattering contribution to g_{mu}-2

abstract:
  We briefly review the current status of the hadronic light-by-light
scattering correction to the muon g-2. Then we present our semi-analytical
evaluation of the pion-pole contribution, using a description of the
pion-photon-photon transition form factor based on large-N_C and short-distance
properties of QCD. We derive a two-dimensional integral representation which
allows to separate the generic features from the model dependence, in order to
better control the latter. Finally, we sketch an effective field theory
approach to hadronic light-by-light scattering which yields the leading
logarithmic terms that are enhanced by a factor N_C. It also shows that the
modeling of hadronic light-by-light scattering by a constituent quark loop is
not consistent with QCD.


title:
Chern-Simons number asymmetry from CP-violation during tachyonic
  preheating

abstract:
  We consider the creation of non-zero Chern-Simons number in a model of the
early Universe, where the Higgs field experiences a fast quench at the end of
inflation. We perform numerical lattice simulations in the Abelian Higgs model
in 1+1 dimensions and in the SU(2)-Higgs model in 3+1 dimensions with an added
effective CP-violating term. We also comment on the appropriate choice of
vacuum initial conditions for classical simulations.


title: W-Particle Distribution in ElectroWeak Tachyonic Pre-Heating

abstract:
  Results are presented of a numerical study of the distribution of W-bosons
generated in a tachyonic electroweak pre-heating transition


title: micrOMEGAs and the relic density in the MSSM

abstract:
  micrOMEGAs is a program that calculates the relic density of the lightest
supersymmetric particle in the MSSM. All tree-level processes for the
annihilation of the LSP are included as well as all possible coannihilation
processes. The cross-sections extracted from CompHEP are calculated exactly.
Relativistic formulae for the thermal average are used and care is taken to
handle poles and thresholds by adopting specific integration routines. The
Higgs masses are calculated with FeynHiggsFast and the QCD corrected Higgs
widths with HDECAY.


title: Studies of New Vector Resonances at the CLIC Multi-TeV e+e- Collider

abstract:
  Several models predict the existence of new vector resonances in the
multi-TeV region, which can be produced in high energy e+e- collisions in the
s-channel. In this paper we review the existing limits on the masses of these
resonances from LEP/SLC and TEVATRON data and from atomic parity violation in
some specific models. We study the potential of a multi-TeV e+e- collider, such
as CLIC, for the determination of their properties and nature.


title: Connecting String Theory and Phenomenology

abstract:
  To make progress in learning the underlying fundamental theory, it will be
necessary to combine bottom-up phenomenology and top-down analysis -- in
particular, top-down is unlikely to succeed alone. Here I elaborate on the role
of both, and describe obstacles that need to be overcome to help data point
toward the underlying theory, as well as approaches that might help to bypass
full systematic treatments. I also summarize arguments that superpartners are
probably being produced at the Tevatron Collider.


title: Nonfactorizable effects in B -> J/psi K

abstract:
  The method of QCD light-cone sum rules is used to calculate soft
nonfactorizable contributions to the decay amplitude for B -> J/psi K. The
result confirms expectations that in color-suppressed decays nonfactorizable
corrections can be sizable.


title: Full electroweak one-loop corrections to A^0 -> \sf_1 \sf_2

abstract:
  We discuss the full electroweak one-loop corrections to the decay of the
pseudoscalar Higgs boson A^0 into two sfermions within the Minimal
Supersymmetric Standard Model. In particular, we consider the sfermions of the
third generation, stops, sbottoms, and staus, including the left-right mixing.
The electroweak corrections can go up to ~15% and can therefore not be
neglected.


title: Resolution-dependent quark masses from meson correlators

abstract:
  We explore the impact of a resolution-dependent constituent quark mass, as
recently applied to diffractive meson production, in QCD correlation functions
of several spin-0 and spin-1 meson channels. We compare the resulting
correlators with experimental and lattice data, analyze the virtues and
limitations of the approach, and discuss the channel dependence of the obtained
effective quark masses.


title: Understanding SUSY limits from LEP

abstract:
  LEP results have constrained heavily the Minimal Supersymmetric Standard
Model, while providing hints for light Higgs boson and for ``SUSY-assisted''
gauge couling unification. In this paper the results obtained at LEP within two
scenarios, the gravity-mediated MSSM framework and the minimal SUGRA scenario
are presented. Model-dependence and coverage of LEP results is discussed.


title: QCD soft gluon exponentiation: YFS MC Approach

abstract:
  We develop and prove the theory of the QCD extension of the YFS Monte Carlo
approach to higher order QED radiative corrections. As a corollary, a new
approach to quantum gravity by one of us (B.F.L.W.) is illustrated.
Semi-analytical results and preliminary explicit Monte Carlo data are presented
for the processes p-bar p -> t-bar t + X at FNAL energies. We comment briefly
on the implications of our results on the CDF/D0 observations and on RHIC/LHC
physics.


title: The tau+ tau- production cross section near threshold revisited

abstract:
  Next-to-next-to-leading contributions to the cross section sigma(e+e- ->
tau+tau-) at energies close to threshold are analysed, taking into account the
known non-relativistic effects and O(alpha^2) corrections. The numerical
changes with respect to previous works are small, but the new corrections give
a true estimate of the uncertainty in the theoretical calculation.


title: Theory of Neutrino Masses and Mixing

abstract:
  In this talk I will review our present knowledge on neutrino masses and
mixing trying to emphasize what has been definitively proved and what is in the
process of being probed. I will also discuss the most important theoretical
implications of these results: the existence of new physics, the estimate of
the scale of this new physics as well as some other possible consequences such
as leptogenesis origin of the baryon asymmetry.


title: Rare top decays t -> c gamma, t -> c g and CKM unitarity

abstract:
  Top flavour-changing neutral decays are extremely suppressed within the
Standard Model (SM) by the GIM mechanism, but can reach observable rates in
some of its extensions. We compute the branching ratios for t -> c gamma and t
-> c g in minimal SM extensions where the addition of a vector-like up or down
quark singlet breaks the unitarity of the 3 x 3 Cabibbo-Kobayashi-Maskawa (CKM)
matrix. The maximum rates obtained indicate to what extent present experimental
data allow 3 x 3 CKM unitarity to be broken in these models, and are too small
to be observed in the near future. As a by-product, we reproduce the
calculation of these branching ratios in the SM, and with an improved set of
parameters we obtain values one order of magnitude smaller than the ones
usually quoted in the literature. We study the CP asymmetries between the decay
rates of the top quark and antiquark, which can be much larger than in the SM,
also as a consequence of the partial breaking of 3 x 3 CKM unitarity.


title: Topics in Electroweak Physics

abstract:
  We briefly discuss five topics in Precision Electroweak Physics: i) the
recently proposed Effective Scheme of Renormalization, ii) evidence for
electroweak bosonic corrections derived from the radiative correction
Delta_r_eff, iii) an approach to estimate the scale of new physics in a
hypothetical Higgs-less scenario, iv) simple and accurate formulae for s^2_eff,
M_W, Gamma_l, and their physical applications, v) a recent proposal concerning
the field renormalization constant for unstable particles.


title:
Next-to-leading order QCD predictions for associated production of top
  squarks and charginos at the CERN LHC

abstract:
  We present the calculations of the complete next-to-leading order (NLO)
inclusive total cross sections for the associated production processes $pp\to
\tilde{t}_i\tilde{\chi}_k^-+X$ in the Minimal Supersymmetric Standard Model at
the CERN Large Hadron Collider. Our calculations show that the total cross
sections for the $\tilde{t}_1\tilde{\chi}_1^-$ production for the lighter top
squark masses in the region 100 GeV $< m_{\tilde{t}_1}<$ 160 GeV can reach 1 pb
in the favorable parameter space allowed by the current precise experiments,
and in other cases the total cross sections generally vary from 10 fb to
several hundred fb except both $m_{\tilde{t}_1}>$ 500 GeV and the
$\tilde{t}_2\tilde{\chi}_2^-$ production channel. Moreover, we find that the
NLO QCD corrections in general enhance the leading order total cross sections
significantly, and vastly reduce the dependence of the total cross sections on
the renormalization/factorization scale, which leads to increased confidence in
predictions based on these results.


title: Singlino-dominated Neutralinos in Extended Supersymmetric Models

abstract:
  We adopt the SUSY benchmark scenario SPS 1a in supersymmetric models where
the Higgs sector is extended by singlet superfields. We consider light
neutralinos with dominant singlino character whose couplings are generally
suppressed. The cross sections for direct production of the singlino-dominated
neutralinos can be of the order of several fb for singlet vevs of some TeV.
Hence even exotic neutralinos which are not the LSP and are omitted in the
decay chains of the other supersymmetric particles may be visible at a high
luminosity linear e^+e^- collider. If, however, the LSP is singlino-dominated
the decay width of the NLSP can be very small and displaced vertices exist for
large singlet vacuum expectation values.


title: Searching for a light Higgs in $\Upsilon$ leptonic decays

abstract:
  Leptonic decays of vector-states of bottomonium are analized searching for a
light pseudoscalar Higgs-like neutral boson manifesting via an apparent
breaking of lepton universality.


title: Product Groups, Discrete Symmetries, and Grand Unification

abstract:
  We present GUT models based on an $SU(5)\times SU(5)$ GUT group. These models
maintain the main successes of simple-group GUTs but permit simple solutions to
the doublet-triplet splitting problem. Moreover, GUT breaking is triggered by
supersymmetry breaking so that the GUT scale is naturally generated as a
combination of the Planck scale and the supersymmetry breaking scale.


title:
Single Spin Asymmetry in Heavy Quark Photoproduction (and Decay) as a
  Test of pQCD

abstract:
  We review the properties of the single spin asymmetry (SSA) in heavy quark
production by linearly polarized photons and analyze the possibility to measure
this SSA in the planned E160/E161 experiments at SLAC.


title:
Isospin relation and SU(3) breaking effects of strong phases in
  Charmless B decays

abstract:
  Isospin and flavor SU(3) relations in charmless hadronic B decays $B\to \pi
\pi, \pi K$ are investigated in detail with paying attention to the SU(3)
symmetry breaking effects in both amplitudes and strong phases. In general, the
isospin and the flavor SU(3) structure of the effective Hamiltonian provide
several relations among the amplitudes and strong phases. Whereas a global fit
to the latest data shows that some relation seems not to be favorable for a
consistent explanation to the current data within the standard model (SM). By
considering several patterns of SU(3) breaking, the amplitudes and the
corresponding strong phases are extracted and compared with the theoretical
estimations. It is found that in the case of SU(3) limits and also the case
with SU(3) breaking only in amplitudes, the fitting results lead to an
unexpected large ratio between two isospin amplitudes
$a^{c}_{3/2}/a^{u}_{3/2}$, which is about an order of magnitude larger than the
SM prediction. The results are found to be insensitive to the weak phase
$\gamma$. By including SU(3) breaking effects on the strong phases, one is able
to obtain a consistent fit to the current data within the SM, which implies
that the SU(3) breaking effect on strong phases may play an important role in
understanding the observed charmless hadronic B decay modes $B\to \pi \pi$ and
$\pi K$. It is possible to test those breaking effects in the near future from
more precise measurements of direct CP violation in B factories.


title: Physics at large p_T^2 and Q^2: Summary

abstract:
  We summarize the results presented in the `Physics at large p_T^2 and Q^2'
working group at the DIS'2002 Workshop. Higgs searches, precision measurements
as well as searches for physics beyond the Standard Model at current and future
experiments are reviewed.


title:
NLO corrections to differential cross sections for pseudo-scalar Higgs
  boson production

abstract:
  We have computed the full next-to-leading (NLO) QCD corrections to the
differential distributions $d^2\sigma/(dp_T~dy)$ for pseudo-scalar Higgs (A)
production at large hadron colliders. This calculation has been carried out
using the effective Lagrangian approach which is valid as long as the mass of
the pseudo-scalar Higgs boson $m_{\rm A}$ and its transverse momentum $p_T$ do
not exceed the top-quark mass $m_t$. The shape of the distributions hardly
differ from those obtained for scalar Higgs (H) production because, apart from
the overall coupling constant and mass, there are only small differences
between the partonic differential distributions for scalar and pseudo-scalar
production. Therefore there are only differences in the magnitudes of the
hadronic differential distributions which can be mainly attributed to the
unknown mixing angle $\beta$ describing the pseudo-scalar Higgs coupling to the
top quarks.


title: New Views of Cosmology and the Microworld

abstract:
  The past few years have seen several breakthroughs in particle astrophysics
and cosmology. In several cases, new observations can only be explained with
the introduction of new fundamental physics. In this talk I summarize some of
these recent advances and describe several areas where progress may well be
made in the future. More specifically, I focus on supersymmetric and axion dark
matter, self-interacting dark matter, cosmic-microwave-background and
large-scale-structure tests of inflation, and the dark-energy problem.


title: Transverse single spin asymmetries in Drell-Yan processes

abstract:
  Recently, it has been shown, contrary to previous beliefs, that the k_T
distribution of quarks in a transversely polarized proton can be asymmetric.
This ``Sivers effect'' had already been used to explain transverse single spin
asymmetries (SSA) observed in inclusive pion production, p(transv. polarized) p
--> pion + X and p-bar(transv. polarized) p --> pion + X. In such channels,
however, other mechanisms, like the ``Collins effect'' (a k_T asymmetric
fragmentation of a transversely polarized quark into pions), may generate SSA.
The Sivers asymmetry is used here to compute SSA in Drell-Yan processes; in
this case, by considering the differential cross-section in the lepton-pair
invariant mass, rapidity and transverse momentum, other mechanisms which may
originate SSA cannot contribute. Estimates for RHIC experiments are given.


title: Gauge dependence and renormalization of tan(beta)

abstract:
  Renormalization schemes for tan(beta) are discussed in view of their gauge
dependence. It is shown that several common renormalization schemes lead to a
gauge-dependent definition of tan(beta), whereas two classes of
gauge-independent schemes show even worse disadvantages. We conclude that the
DRbar-scheme is the best compromise.


title: B-decays at Large $\tan\beta$ as a Probe of SUSY Breaking

abstract:
  We consider $B_s \to \mu^+ \mu^-$ and the muon $(g-2)_\mu$ in various SUSY
breaking mediation mechanisms. If the decay $B_s \to \mu^+ \mu^-$ is observed
at Tevatron Run II with a branching ratio larger than $\sim 2 \times 10^{-8} $,
the noscale supergravity (including the gaugino mediation), the gauge mediation
scenario with small number of messenger fields and low messenger scale, and a
class of anomaly mediation scenarios will be excluded, even if they can
accommodate a large muon $(g-2)_\mu$. On the other hand, the minimal
supergravity scenario and similar mechanisms derived from string models can
accommodate this observation.


title: Minimal supersymmetric SU(5) theory and proton decay: where do we stand?

abstract:
  We review the situation regarding d=5 proton decay in the minimal
supersymmetric SU(5) GUT. The minimal theory is defined as the theory with the
minimal matter and Higgs content all the way up to the Planck scale; of course,
this allows for the possible presence of Planck induced physics. It can be said
that either higher dimensional operators must be present or/and some
fine-tuning of O(1%) of the Higgs mass must be tolerated in order to save the
theory.


title:
Combined fits to the supersymmetric explanation of anomalous
  lepton-photon-missing E_T events

abstract:
  The CDF experiment reported a lepton photon missing transverse energy (E_T)
signal 3 sigma in excess of the Standard Model prediction in Tevatron Run I
data. The excess can be explained by the resonant production of a smuon, which
subsequently decays to a muon, a photon and a gravitino. Here, we perform
combined fits of this model to the CDF gamma lepton missing E_T excess, the D0
measurement of the same channel and the CDF photon missing E_T channel.
Although the rates of the latter two analyses are in agreement with the
Standard Model prediction, our model is in good agreement with these data
because their signal to background efficiency is low at the best-fit point.
However, they help to constrain the model away from the best fit point.


title:
Large enhancement of D -> e nu and Ds -> e nu in R Parity violating SUSY
  models

abstract:
  The purely leptonic decays D -> e nu and Ds -> e nu, for which no
experimental limits exist, are highly suppressed in the Standard Model. Mere
observation of these decays at the B factories BELLE/BaBar or forthcoming
CLEO-c would be a clear signal of physics beyond the SM. We show that R parity
violating slepton contributions can give rise to spectacular enhancements of
the decay rates, resulting in branching ratios as large as 5 x 10^-3, which
strongly motivates a search in these channels.


title:
The Physics Potential of Future Long Baseline Neutrino Oscillation
  Experiments

abstract:
  Different future long baseline neutrino oscillation setups are discussed and
the remarkable potential for very precise measurements of mass splittings and
mixing angles is shown. Furthermore it will be possible to make precise tests
of MSW effects, which allow to determine the sign of $\Delta m^2$. Finally
strong limits or measurements of leptonic CP violation will be possible.


title: Gluonic Penguins in $B\to\pi\pi$ from QCD Light-Cone Sum Rules

abstract:
  The $B\to \pi\pi$ hadronic matrix element of the chromomagnetic dipole
operator $O_{8g}$ (gluonic penguin) is calculated using the QCD light-cone sum
rule approach. The resulting sum rule for $<\pi\pi |O_{8g}|B>$ contains, in
addition to the $O(\alpha_s)$ part induced by hard gluon exchanges, a
contribution due to soft gluons. We find that in the limit $m_b\to \infty$ the
soft-gluon contribution is suppressed as a second power of $1/m_b$ with respect
to the leading-order factorizable $B\to \pi\pi$ amplitude, whereas the
hard-gluon contribution has only an $\alpha_s$ suppression. Nevertheless, at
finite $m_b$, soft and hard effects of the gluonic penguin in $B\to \pi\pi$ are
of the same order. Our result indicates that soft contributions are
indispensable for an accurate counting of nonfactorizable effects in charmless
B decays. On the phenomenological side we predict that the impact of gluonic
penguins on $\bar{B}^0_d\to \pi^+\pi^-$ is very small, but is noticeable for
$\bar{B}^0_d\to \pi^0\pi^0$.


title:
Improved Model-Independent Analysis of Semileptonic and Radiative Rare
  Decays

abstract:
  We study the impact of recent B-factories measurements and upper limit of
radiative and semileptonic rare B-decays. We present model independent
constraints on the relevant Wilson coefficients and show the impact on the
parameter space of some concrete realizations of the Minimal Supersymmetric
Standard Model.


title: Associated Higgs production with heavy quark pairs at hadron colliders

abstract:
  The reactions p\bar{p}/pp -> t\bar{t}H+X represent important channels in the
search for the Standard Model Higgs boson at the Tevatron and the LHC. In the
leading perturbative order the cross sections suffer from severe
(renormalization and factorization) scale uncertainties. The next-to-leading
order QCD corrections stabilize the cross sections considerably. The
calculation of these corrections is briefly reviewed, and a few numerical
results are discussed.


title:
Properties of heavy quarkonia and B_c mesons in the relativistic quark
  model

abstract:
  The mass spectra and electromagnetic decay rates of charmonium, bottomonium
and B_c mesons are comprehensively investigated in the relativistic quark
model. The presence of only heavy quarks allows the expansion in powers of
their velocities. All relativistic corrections of order v^2/c^2, including
retardation effects and one-loop radiative corrections, are systematically
taken into account in the computations of the mass spectra. The obtained wave
functions are used for the calculation of radiative magnetic dipole (M1) and
electric dipole (E1) transitions. It is found that relativistic effects play a
substantial role. Their account and the proper choice of the Lorentz structure
of the quark-antiquark interaction in a meson is crucial for bringing
theoretical predictions in accord with experimental data. A detailed comparison
of the calculated decay rates and branching fractions with available
experimental data for radiative decays of charmonium and bottomonium is
presented. The possibilities to observe the currently missing spin-singlet S
and P states as well as D states in bottomonium are discussed. The results for
B_c masses and decays are compared with other quark model predictions.


title: Light Mesons from Heavy B and Hyperon Decays

abstract:
  Decays of heavy mesons and of heavy hyperons are used to provide tests of the
standard model and information about new mixing schemes for the $\eta$ and
$\eta^{'}$ mesons. These include the two body decays $B_s \to J / \psi M$ and
$B_d \to J / \psi M$, $B \to \eta (\eta ^{'})K(K^\ast)$ and $\Lambda_b \to
\Lambda \eta (\eta ^{'})$, semileptonic $D$ decays, and properties of radially
excited mesons.


title: Prediction of charm-production fractions in neutrino interactions

abstract:
  The way a charm-quark fragments into a charmed hadron is a challenging
problem both for the theoretical and the experimental particle physics.
Moreover, in neutrino induced charm-production, peculiar processes occur such
as quasi-elastic and diffractive charm-production which make the results from
other experiments not directly comparable. We present here a method to extract
the charmed fractions in neutrino induced events by using results from
$e^+e^-$, $\pi N$, $\gamma N$ experiments while taking into account the
peculiarities of charm-production in neutrino interactions. As results, we
predict the fragmentation functions as a function of the neutrino energy and
the semi-muonic branching ratio, $B_\mu$, and compare them with the available
data.


title: Neutrinos in the Family Replicated Gauge Group Model

abstract:
  We present a discussion of the neutrino mass problem in the anti-grand
unification theory based on three family replicated copies of the Standard
Model gauge group (SMG). We consider two versions of the theory, with and
without right-handed neutrinos, and present order of magnitude fits to the 17
measured quark-lepton mass and mixing angle variables. In the model without
right-handed neutrinos, based on the gauge group $SMG^3\times U(1)_f$ and an
isotriplet Higgs, we obtain a good 4 parameter fit, but with a vacuum
oscillation solution to the solar neutrino problem. In the second model, based
on the gauge group $(SMG\times U(1)_{B-L})^3$, we obtain a good 5 parameter fit
using the usual right-handed neutrino see-saw mechanism to generate an LMA-MSW
solution to the solar neutrino problem. The CHOOZ mixing angle bound is easily
satisfied in the first model and is close to the predicted value in the second
model.


title:
Improved predictions of the standard model and the detection of new
  physics in neutron beta decay

abstract:
  We improve the current predictions of the standard model for neutron beta
decay observables and compare them with the currently available ones. Next we
study their implications in the possible detection of new physics. We discuss
where the limitations are and where further efforts should be directed.


title: Status report on TAUOLA, its environment, and its applications

abstract:
  The status of the Monte Carlo programs for the simulation of the tau-lepton
production and decay in high energy accelerator experiments is reviewed. In
particular, the status of the following packages is discussed: (i) TAUOLA for
tau-lepton decay and PHOTOS for radiative corrections in decays, (ii) MC-TESTER
for universal tests of the Monte Carlo programs describing particle decays,
(iii) KORALB, KORALZ, KKMC packages for tau-pair production in e+e- collisions,
and (iv) universal interface of TAUOLA for the decay of tau-leptons produced by
``any'' generator.


title:
Calculation of the Pseudoscalar-Isoscalar Hadronic Current Correlation
  Functions of the Quark-Gluon Plasma

abstract:
  We report the results of calculations of pseudoscalar-isoscalar hadronic
current correlators using the Nambu--Jona-Lasinio model and the real-time
finite-temperature formalism. Results are presented for the temperatures range
1.2 $\leq T/T_c\leq$ 6.0, where $T_c$ is the temperature of the
confinement-deconfinement transition, which we take to be $T_c=170$ MeV. Two
important resonant features are seen in our calculations. In order to
understand the origin of these resonances, we have performed relativistic
random phase approximation (RPA)calculations of the temperature-dependent
spectrum of the $\eta$ mesons for $T<T_c$. For the RPA calculations, use is
made of a simple model in which we introduce temperature- dependent constituent
quark masses calculated in a mean-field approximation and a
temperature-dependent confining interaction whose form is motivated by recent
studies made using lattice simulations of QCD with dynamical quarks. We also
introduce temperature-dependent coupling constants in our generalized NJL
model. Our motivation in the latter case is the simulation of the approach to a
weakly interacting system at high temperatures. We present some evidence that
supports our use of temperature-dependent coupling constants for the NJL model.
We suggest that our results may be of interest to researchers who use lattice
simulations of QCD to obtain temperature dependent spectral functions for
various hadronic current correlation functions.


title: Renormalization Group and Decoupling in Curved Space

abstract:
  It is well known that the renormalization group equations depend on the scale
where they are applied. This phenomenon is especially relevant for the massive
fields in curved space, because the decoupling effects may be responsible for
important cosmological applications like the graceful exit from the inflation
and low-energy quantum dynamics of the cosmological constant. We investigate,
using both covariant and non-covariant methods of calculations and
mass-dependent renormalization scheme, the vacuum quantum effects of a massive
scalar field in curved space-time. In the higher derivative sector we arrive at
the explicit form of decoupling and obtain the beta-functions in both UV and IR
regimes as the limits of general expressions. For the cosmological and Newton
constants the corresponding beta-functions are not accessible in the
perturbative regime and in particular the form of decoupling remains unclear.


title: A Model for Neutrino Masses and Dark Matter

abstract:
  We propose a model for neutrino masses that simultaneously results in a new
dark matter candidate, the right-handed neutrino. We derive the dark matter
abundance in this model, show how the hierarchy of neutrino masses is obtained,
and verify that the model is compatible with existing experimental results. The
model provides an economical method of unifying two seemingly separate puzzles
in contemporary particle physics and cosmology.


title: Supersymmetry and the Linear Collider

abstract:
  We present a pedagogical introduction to supersymmetry and supersymmetric
models and give an overview of the potential of the linear collider for
studying them. If supersymmetry is found, its discovery will bring with it many
more questions than answers. These include:
  -Are the newly discovered particles really superpartners?
  -If not all superpartners are discovered, where are the rest of them?
  -Do the electromagnetic, weak, and strong forces unify?
  -Is a supersymmetric particle the dark matter?
  -How are the supersymmetric flavor and CP problems solved?
  -What is the scale of supersymmetry breaking?
  -What are the fundamental interactions at the Planck scale?
  We review how the linear collider will provide definitive answers to some of
these and may shed light on the rest, even if only one or a few superpartners
are kinematically accessible.


title:
Minijet Initial Conditions For Non-Equilibrium Parton Evolution at RHIC
  and LHC

abstract:
  An important ingredient for the non-equilibrium evolution of partons at RHIC
and LHC is to have some physically reasonable initial conditions for the single
particle phase space distribution functions for the partons. We consider
several plausible parametrizations of initial conditions for the single
particle distribution function f_i(x,p) and fix the parameters by matching \int
f(x,p)p^\mu d \sigma_\mu to the invariant momentum space semi-hard parton
distributions obtained using perturbative QCD (pQCD), as well as fitting low
order moments of the distribution function. We consider parametrizations of
f_i(x,p) with both boost invariant and boost non-invariant assumptions. We
determine the initial number density, energy density and the corresponding
(effective) temperature of the minijet plasma at RHIC and LHC energies. For a
boost non-invariant minijet phase-space distribution function we obtain ~
30(140) /fm^3 as the initial number density, ~ 50(520) GeV/fm^3 as the initial
energy density and ~ 520(930) MeV as the corresponding initial effective
temperature at RHIC(LHC).


title: Cosmic Microwave Background from Late-Decaying Scalar Condensations

abstract:
  We study the cosmic microwave background (CMB) anisotropy in the scenario
with late-decaying scalar condensations which arise in many class of
cosmological scenarios based on supersymmetric models. With such a scalar
condensation \phi, the CMB radiation we observe today originates to \phi and
hence the CMB anisotropy is affected if \phi has a primordial fluctuation. In
particular, if all the components in the universe (i.e., radiation, baryon,
cold dark matter, and so on) are generated from the decay product of \phi, the
dominant source of the cosmic density perturbations can be the primordial
fluctuation of \phi, not the fluctuation of the inflaton field. In this case,
the constraints on the inflation models can be drastically relaxed. In other
case, the baryon or the CDM may not be from the decay product of \phi and
correlated mixture of the adiabatic and isocurvature fluctuations can be
generated. If so, the CMB angular power spectrum may not be the same as the
adiabatic result and the on-going MAP experiment may observe a deviation from
the prediction of the standard inflationary scenario.


title: Are four neutrino models ruled out?

abstract:
  We show explicitly that four neutrino models of the 2+2 variety still provide
an acceptable global fit to the solar, atmospheric and LSND neutrino data. The
goodness of fit, defined in the usual way, is found to be 0.26 for the simplest
such model. That is, we find that there is a 26% probability of obtaining a
worse global fit to the neutrino data We also make some specific comments on
the paper, ``Ruling out four-neutrino oscillation interpretations of the LSND
anomaly'' [hep-ph/0207157], and explain why they reached drastically different
conclusions.


title: Chiral Extrapolation of Lattice Data for Heavy Baryons

abstract:
  The masses of heavy baryons containing a b quark have been calculated
numerically in lattice QCD with pion masses which are much larger than its
physical value. In the present work we extrapolate these lattice data to the
physical mass of the pion by applying the effective chiral Lagrangian for heavy
baryons, which is invariant under chiral symmetry when the light quark masses
go to zero and heavy quark symmetry when the heavy quark masses go to infinity.
A phenomenological functional form with three parameters, which has the correct
behavior in the chiral limit and appropriate behavior when the pion mass is
large, is proposed to extrapolate the lattice data. It is found that the
extrapolation deviates noticably from the naive linear extrapolation when the
pion mass is smaller than about 500MeV. The mass differences between Sigma_b
and Sigma_b^* and between Sigma_b^{(*)} and Lambda_b are also presented.
Uncertainties arising from both lattice data and our model parameters are
discussed in detail. We also give a comparision of the results in our model
with those obtained in the naive linear extrapolations.


title: New Constraints on the running-mass inflation model

abstract:
  We evaluate new observational constraints on the two-parameter
scale-dependent spectral index predicted by the running-mass inflation model by
combining the latest Cosmic Microwave Background (CMB) anisotropy measurements
with the recent 2dFGRS data on the matter power spectrum, with Lyman $\alpha $
forest data and finally with theoretical constraints on the reionization
redshift. We find that present data still allow significant scale-dependence of
$n$, which occurs in a physically reasonable regime of parameter space.


title:
Single Transverse-Spin Asymmetry in $pp^\uparrow \to \pi X$ and
  $ep^\uparrow \to \pi X$

abstract:
  Cross section formulas for the single spin asymmetry in $p^\uparrow p\to
\pi(\ell_T)X$ and $e p^\uparrow \to \pi(\ell_T)X$ are derived and its
characteristic features are discussed.


title: Color van der Waals forces between heavy quarkonia in effective QCD

abstract:
  The perturbative renormalization group for light-front QCD Hamiltonian
produces a logarithmically rising interquark potential already in second order,
when all gluons are neglected. There is a question if this approach produces
also color van der Waals forces between heavy quarkonia and of what kind. This
article shows that such forces do exist and estimates their strength, with the
result that they are on the border of exclusion in naive approach, while more
advanced calculation is possible in QCD.


title: Introduction to Chiral Perturbation Theory

abstract:
  This article provides a pedagogical introduction to the basic concepts of
chiral perturbation theory and is designed as a text for a two-semester course
on that topic.
  Chapter 1 serves as a general introduction to the empirical and theoretical
foundations which led to the development of chiral perturbation theory.
  Chapter 2 deals with QCD and its global symmetries in the chiral limit; the
concept of Green functions and Ward identities reflecting the underlying chiral
symmetry is elaborated.
  In Chap. 3 the idea of a spontaneous breakdown of a global symmetry is
discussed and its consequences in terms of the Goldstone theorem are
demonstrated.
  Chapter 4 deals with mesonic chiral perturbation theory and the principles
entering the construction of the chiral Lagrangian are outlined.
  Various examples with increasing chiral orders and complexity are given.
  Finally, in Chap. 5 the methods are extended to include the interaction
between Goldstone bosons and baryons in the single-baryon sector, with the main
emphasis put on the heavy-baryon formulation.
  At the end, the method of infrared regularization in the relativistic
framework is discussed.


title: Production of Missing c\bar{c} and b\bar{b} States

abstract:
  The heavy quarkonium c\bar{c} and b\bar{b} resonances have a rich
spectroscopy with numerous narrow S, P, and D-wave levels below the production
threshold of open charm and beauty mesons. The mass predictions for these
states are an important test of QCD calculations. We review some recent work
describing the production of missing \eta_b(nS), 1^3D_J(b\bar{b}) and
1^1P_1(c\bar{c}) and 1^1P_1(b\bar{b}) states.


title: Topics in Meson Spectroscopy

abstract:
  In this mini-review I discuss three topics in meson spectroscopy. The
production of heavy quarkonium states, S-wave scattering below 1 GeV, and
exotic hybrid meson production. This is not intended to be a comprehensive
review, just an overview of several topics of current interest.


title: MSSM Higgs particles in the intense--coupling regime

abstract:
  In the "intense--coupling" regime all Higgs bosons of the Minimal
Supersymmetric extension of the Standard Model (MSSM) are rather light and have
comparable masses of O(100 GeV). They couple maximally to electroweak gauge
bosons, and for large ratios of the vacuum expectation values of the two Higgs
doublet fields, tan\beta, they interact strongly with the standard third
generation fermions. We present in this note a comprehensive study of this
scenario. We summarize the main phenomenological features, and the accordance
with the direct constraints from Higgs boson searches at LEP2 and the Tevatron
as well as the indirect constraints from precision measurements will be
checked. After the presentation of the decay branching ratios, we discuss the
production cross sections of the neutral Higgs particles in this regime at
future colliders, the Tevatron Run II, the LHC and a 500 GeV e+e- linear
collider.


title: A Quintessential Axion

abstract:
  The model independent axion of string theory has a decay constant of order of
the Planck scale. We explore the properties of this quintessence candidate
(quintaxion) in the scheme of hidden sector supergravity breakdown. In models
allowing for a reasonable $\mu$ term, the hidden sector dynamics may lead to an
almost flat potential responsible for the vacuum energy of $(0.003 {\rm
eV})^4$. A solution to the strong CP-problem is provided by an additional
hidden sector pseudoscalar (QCD axion) with properties that make it an
acceptable candidate for cold dark matter of the universe.


title: Semileptonic B --> eta l nu decay in light cone QCD

abstract:
  We study semileptonic decay B --> eta l nu. The transition form factors for
this decays are calculated by using light cone QCD sum rules.


title:
JetWeb: A WWW Interface and Database for Monte Carlo Tuning and
  Validation

abstract:
  A World Wide Web interface to a Monte Carlo validation and tuning facility is
described. The aim of the package is to allow rapid and reproducible
comparisons to be made between detailed measurements at high-energy physics
colliders and general physics simulation packages. The package includes a
relational database, a Java servlet query and display facility, and clean
interfaces to simulation packages and their parameters.


title:
Top quark pair production and decay at linear colliders: signal vs. off
  resonance background

abstract:
  Standard Model predictions for the reactions with six fermions in the final
state relevant for top quark pair production and decay at linear colliders are
discussed. An issue of the double resonance signal versus non doubly resonant
background is addresed. Effects related to the off-mass-shell production of the
t\bar{t}-pair are discussed.


title: On the Calculation of the NLO Virtual Photon Impact Factor

abstract:
  The definition of the virtual photon impact factor involves the integration
of the s-channel discontinuity of the photon-Reggeon scattering amplitude over
the right cut. It permits to formulate a new approach for the calculation of
the impact factor based on analytical properties of the amplitude in question.
In the next-to-leading order it may give a possibility for considerable
simplification of the calculation. We have shown that a part of the diagrams
contributing to the impact factor can be treated without their real
calculation.


title: LFV Constraints on the Majorana Mass Scale in mSUGRA

abstract:
  We discuss constraints on the right-handed Majorana mass scale M_R of the
SUSY see-saw model in the mSUGRA framework. The sensitivity of radiative
lepton-flavor violating decays on M_R is compared with the reach in
lepton-flavor violating channels at a future linear collider.


title: Diffractive Higgs bosons and prompt photons at hadron colliders

abstract:
  Models for soft color interactions have been successful in describing and
predicting diffractive hard scattering processes in ep collisions at DESY HERA
and ppbar at the Fermilab Tevatron. Here we present new comparisons of the
model to recent diffractive dijet data, also showing good agreement. The
topical issue of diffractive Higgs production at the Tevatron and LHC hadron
colliders is further investigated. For H->gamma gamma the irreducible
background of prompt photon pairs from qqbar->gamma gamma and gg->gamma gamma
is always dominating, implying that higher branching ratio decay modes of the
Higgs have to be used. However, such prompt photons can be used to test the
basic prediction for Higgs production since gg->gamma gamma involves a quark
loop diagram similar to gg->H.


title:
Physics Objectives for Future Studies of the Spin Structure of the
  Nucleon

abstract:
  Physics perspectives are shown for future experiments in electron or positron
scattering on nucleons, towards a deep and comprehensive understanding of the
angular momentum structure of the nucleon in the context of Quantum
Chromodynamics. Measurements of Generalised Parton Distributions in exclusive
reactions and precise determinations of forward Parton Distributions in
semi-inclusive deep inelastic scattering are identified as major physics
topics. Requirements are discussed for a next generation of high-luminosity
fixed-target experiments in the energy range 30-200 GeV.


title: LEP Constraints on 5-Dimensional Extensions of the Standard Model

abstract:
  We study minimal 5-dimensional extensions of the Standard Model, in which all
or only some of the SU(2)$_L$ and U(1)$_Y$ gauge fields and Higgs bosons
propagate in the fifth compact dimension. In all the 5-dimensional settings,
the fermions are assumed to be localized on a 3-brane. In addition, we present
the consistent procedure for quantizing 5-dimensional models in the generalized
$R_\xi$ gauge. Bounds on the compactification scale between 4 and 6 TeV,
depending on the model, are established by analyzing electroweak precision
measurements and LEP2 cross sections.


title: A model of CPT violation for neutrinos

abstract:
  Any local relativistic quantum field theory of Dirac-Weyl fermions conserves
CPT. Here we examine whether a simple nonlocal field theory can violate CPT. We
construct a new relativistic field theory of fermions, which we call
``homeotic'', which is nonlocal but causal and Lorentz invariant. The free
homeotic theory is in fact equivalent to free Dirac theory. We show that a
homeotic theory with a suitable nonlocal four-fermion interaction is causal and
as a result has a well-defined perturbative S-matrix. By coupling a
right-handed homeotic fermion to a left-handed Dirac-Weyl fermion, we obtain a
causal theory of CPT-violating neutrino oscillations.


title: High-multiplicity pA collisions and the small-x effective action

abstract:
  I discuss the p_t distributions for high-multiplicity events originating from
semi-classical variation of the gluon density of the proton.The multiplicity
distribution measures the curvature of the effective action for the small-x
gluon fields. For pA collisions at the RHIC and LHC colliders, semi-classically
the multiplicity distribution reflects the distribution of saturation momenta
of the proton but not that of the nucleus. The average transverse momentum in
the central region grows with dN/dy, while the p_t distribution of leading
hadrons in the proton fragmentation region should depend less on the
multiplicity in the central region.


title: QCD Corrections in Gamma_sl(B)

abstract:
  Short-distance expansion of the total semileptonic B widths is reviewed for
the OPE-conformable scheme employing low-scale running quark masses. The third-
and fourth-order BLM corrections are given and the complete resummation of the
BLM series presented. The effect of higher perturbative orders with running
quark masses is found very small. Numerical consequences for |V_{cb}| are
addressed.


title: CP violation in 5D Split Fermions Scenario

abstract:
  We give a new configuration of split fermion positions in one extra dimension
with two different Yukawa coupling strengths for up-type, $h_u$, and down-type,
$h_d$, quarks at $\frac{h_u}{h_d}=36.0$. The new configurations can give enough
CP violating (CPV) phase for accommodating all currently observed CPV
processes. Therefore, a 5D standard model with split fermions is viable. In
addition to the standard CKM phase, new CPV sources involving Kaluza-Klein(KK)
gauge bosons coupling which arise from the fact that unitary rotation which
transforms weak eigenstates into their mass eigenstates only holds for the zero
modes which are the SM fields and not for the KK excitations. We have examined
the physics of kaon, neutron, and $B/D$ mesons and found the most stringent
bound on the size $R$ of the extra dimension comes from $|\epsilon_K|$.
Moreover, it depends sensitively on the width, $\sigma$, of the Gaussian
wavefunction in the extra dimension used to describe of the fermions. When
$\sigma/R \ll 1$, the constraint will be lifted due to GIM suppression on the
flavor changing neutral current(FCNC) and CPV couplings.


title: Introducing the Little Higgs

abstract:
  Little Higgs theories are an exciting new possibility for physics at TeV
energies. In the Standard Model the Higgs mass suffers from an instability
under radiative corrections. This ``hierarchy problem'' motivates much of
current physics beyond the Standard Model research. Little Higgs theories offer
a new and very promising solution to this problem in which the Higgs is
naturally light as a result of non-linearly realized symmetries. This article
reviews some of the underlying ideas and gives a pedagogical introduction to
the Little Higgs. The examples provided are taken from the paper "A Little
Higgs from a Simple Group", by D.E. Kaplan and M. Schmaltz.


title: Reconstruction of Supersymmetric High Scale Theories

abstract:
  We demonstrate how the fundamental supersymmetric theory at high energy
scales can be reconstructed using precision data expected at future high energy
collider experiments. We have studied a set of representative examples in this
context: minimal supergravity; gauge mediated supersymmetry breaking; and
superstring effective field theories.


title: Does the LMA MSW solar solution imply the Dirac nature of neutrinos?

abstract:
  Operating with the bilarge neutrino mixing, we show that in the option of
Dirac neutrinos the fermion universality -- expressed by the proportionality of
neutrino masses to charged-lepton masses -- predicts $\Delta m_{21}^2$ of the
order $10^{-5} {\rm eV}^2$, consistently with the LMA MSW solar solution. In
contrast, in the option of Majorana neutrinos the fermion universality --
introduced as the seesaw proportionality of neutrino masses to charged-lepton
masses squared -- predicts $\Delta m_{21}^2$ of the order $10^{-8} {\rm eV}^2$,
what is consistent rather with the LOW MSW solar solution. Thus, the favored
LMA MSW estimation of $\Delta m_{21}^2$ might be a signal from the Dirac nature
of neutrinos.


title:
Properties of the Spin-flip Amplitude of Hadron Elastic Scattering and
  Possible Polarization Effects at RHIC

abstract:
  With relation to the RHIC spin program we research the polarization effects
in elastic proton-proton scattering at small momentum transfer and in the
diffraction dip region. The calculations take into account the Coulomb-hadron
interference effects including the additional Coulomb-hadron phase. In
particular we show the impact of the form of the hadron potential at large
distances on the behavior of the hadron spin-flip amplitude at small angles.
The $t$-dependence of the spin-flip amplitude of high energy hadron elastic
scattering is analyzed under different assumptions on the hadron interaction.


title: Two-Loop Self-Dual QED

abstract:
  We present explicit closed-form expressions for the two-loop Euler-Heisenberg
Lagrangians in a constant self-dual field, for both spinor and scalar QED. The
simplicity of these representations allows us to examine in detail the
asymptotic properties of these Lagrangians, and to construct their imaginary
part using Borel dispersion relations. In particular, for this self-dual case
we obtain the explicit form of the Lebedev-Ritus functions appearing in the
Schwinger representation of the imaginary part at two loops. Using the
connection between self-duality and helicity, we also obtain explicit formulas
for the low energy limits of the `all + helicity' N photon amplitudes, in
scalar and spinor QED at one and two loops.


title: The Production of Gluino Pairs in High Energy e+ e- Collisions

abstract:
  In the Minimal Supersymmetric Standard Model (MSSM), the process e+ e- ->
gluino gluino is mediated by quark/squark loops, dominantly of the third
generation, where the mixing of left- and right-handed states can become large.
Taking into account realistic beam polarization effects, photon and Z0-boson
exchange, and current mass exclusion limits, we scan the MSSM parameter space
for various e+e- center-of-mass energies to determine the regions, where gluino
production should be visible.


title: Pion and kaon parton distribution functions in a meson cloud model

abstract:
  In a model of hadrons in which the hadron wave function at low $Q^2$ is
represented by a hadron-like Fock state expansion, we calculate the $\pi$ and
$K$ parton distribution functions by comparing to experimental data. We show
that the model gives an accurate description of available data and, in
addition, gives a clear prediction of the initial flavors to be considered at
the low $Q^2$ scale where perturbative evolution starts


title:
Catastrophic rearrangement of a compact star due to the quark core
  formation

abstract:
  We study properties of compact stars with the deconfinement phase transition
in their interiors. The equation of state of cold baryon-rich matter is
constructed by combining a relativistic mean-field model for the hadronic phase
and the MIT Bag model for the deconfined phase. In a narrow parameter range two
sequences of compact stars (twin stars), which differ by the size of the quark
core, have been found. We demonstrate the possibility of a rapid transition
between the twin stars with the energy release of about $10^{52}$ ergs. This
transition should be accompanied by the prompt neutrino burst and the delayed
gamma-ray burst.


title:
Charm Radiative Decays with Neutral Mesons D^0 -> K^0(bar) pi^0 gamma,
  D^0 -> K^0(bar) eta (eta') gamma

abstract:
  The radiative decays D^0 -> K^0(bar) P^0 gamma with nonresonant K^0(bar) P^0
(P^0 = pi^0, eta, eta') are considered within the framework which combines
heavy quark effective theory and the chiral Lagrangian. Due to neutral mesons
the amplitudes do not have bremsstrahlung contributions. We assume
factorization for the weak matrix elements. Light (virtual) vector mesons are
found to give the main contribution to the decay amplitudes. The decay D^0 ->
K^0(bar) pi^0 gamma is predicted to have a branching ratio of 3 x 10^(-4), with
comparable contributions from parity-conserving and parity-violating parts of
the amplitude. The decays with eta (eta') in the final state are expected with
branching ratios of 1.1 x 10^(-5) and 0.4x10^(-7) respectively and are mainly
parity conserving.


title:
Single and pair production of MSSM Higgs bosons as a probe of
  scalar-pseudoscalar mixing at e+e- colliders

abstract:
  We study the associated production of the $A^0$ neutral CP--odd Higgs boson
with a neutral gauge boson $Z$ as well as single production of $A^0$ via
$e^+e^- \to \nu_e {\bar\nu}_e A^0$ at the one loop level in the Minimal
Supersymmetric Standard Model (MSSM). We show that the MSSM cross--section may
be enhanced by light SUSY particles. Then we study the production processes
$e^+e^-\to H^0_iZ$, $H^0_i\nu_e\bar \nu_e$ and $H^0_iH^0_j$ in the context of
the MSSM with scalar-pseudoscalar mixing. In a given channel we show that the
cross--section for all i (=1,2,3) can be above 0.1 fb provided $M_{H_{2,3}}\la
300$ GeV. This should be detectable at a Next Linear Collider and would provide
evidence for scalar--pseudoscalar mixing.


title:
Three-body decays of $\tilde \chi_1^0$ in $\rp$ models with dominant
  $\lambda$ and $\lambda'$ couplings

abstract:
  Decays of the lightest neutralino are studied in $R_p$-violating models, with
operators $\lambda^\prime L Q D^c$ and $\lambda L L E^c$ involving
third-generation matter fields and with dominant $\lambda^\prime$ and $\lambda$
couplings. Decays with the top-quark among the particles produced are
considered, in addition to those with an almost massless final state.
Phenomenological analyses for examples of both classes of decays are presented.
No specific assumption on the composition of the lightest neutralino is made.
Our formulae can easily be generalized to study decays of heavier neutralinos.
We also discuss effects of the $\rp$ decays of the $\tilde \chi_1^0$ on the
possible faking of the $H^\pm$ signal at the LHC by the recently pointed out
$\tilde \tau \bar b t$ production through $\lambda'_{333}$ coupling.