title: The hidden sterile neutrino and the (2+2) sum rule

abstract:
  We discuss oscillations of atmospheric and solar neutrinos into sterile
neutrinos in the 2+2 scheme. A zeroth order sum rule requires equal
probabilities for oscillation into nu_s and nu_tau in the solar+atmospheric
data sample. Data does not favor this claim. Here we use scatter plots to
assess corrections of the zeroth order sum rule when (i) the 4 x 4 neutrino
mixing matrix assumes its full range of allowed values, and (ii) matter effects
are included. We also introduce a related "product rule". We find that the sum
rule is significantly relaxed, due to both the inclusion of the small mixing
angles (which provide a short-baseline contribution) and to matter effects. The
product rule is also dramatically altered. The observed relaxation of the sum
rule weakens the case against the 2+2 model and the sterile neutrino. To
invalidate the 2+2 model, a global fit to data with the small mixing angles
included seems to be required.


title: Light Bottom Squark Phenomenology

abstract:
  Agreement of theoretical calculations with the observed production rate of
bottom quarks at hadron colliders is improved by the introduction of a
contribution from pair-production of light gluinos, of mass 12 to 16 GeV,
having two-body decays into bottom quarks and light bottom squarks with mass
$\simeq 2$ to 5.5 GeV. Predictions are made for hadronic and radiative decays
of the Upsilon states. In the limit of large $\tan\beta$, the dominant decay
mode of the light scalar Higgs boson is into a pair of light bottom squarks
that materialize as jets of hadrons.


title: Scalar meson exchange in V->P0P0gamma decays

abstract:
  The complementarity between Chiral Perturbation Theory and the Linear Sigma
Model is exploited to study scalar meson exchange in V->P0P0gamma decays. The
recently reported experimental data on phi->pi0pi0gamma, phi->pi0etagamma and
rho->pi0pi0gamma can be satisfactorily accommodated in our framework.


title:
Single Charged Higgs Boson Production in Polarized Photon Collision and
  the Probe of New Physics

abstract:
  We study single charged Higgs boson production in photon-photon collision as
a probe of the new dynamics of Higgs interactions. This is particularly
important when the mass ($M_{H^\pm}$) of charged Higgs bosons ($H^{\pm}$) is
relatively heavy and above the kinematic limit of the pair production
($M_{H^\pm} > \sqrt{s}/2$). We analyze the cross sections of single charged
Higgs boson production from the photon-photon fusion processes,
$\gamma\gamma\to \tau \bar \nu H^+$ and $\gamma\gamma\to b \bar c H^+$, as
motivated by the minimal supersymmetric standard model and the dynamical
Topcolor model. We find that the cross sections at such a $\gamma\gamma$
collider can be sufficiently large even for $M_{H^\pm} > \sqrt{s}/2$, and is
typically one to two orders of magnitude higher than that at its parent
$e^-e^+$ collider. We further demonstrate that the polarized photon beams can
provide an important means to determine the chirality structure of Higgs Yukawa
interactions with the fermions.


title: Prospects for Higgs search at the LHC

abstract:
  The present status of theoretical calculations for signal and background
processes relevant to the Higgs boson search at the LHC is reviewed, with
special emphasis on recent developments. The issue of Higgs properties
determination at the LHC is addressed.


title: Higgs Decays into Leptons

abstract:
  We discuss the prospects for the discovery of neutral Higgs bosons ($\phi^0 =
H^0, h^0, A^0$) in multi-Higgs doublet models via their decays into leptons at
hadron colliders. A major focus will be searching for Higgs bosons produced
with bottom quarks via Higgs decays into muon pairs ($pp \to b\bar{b}\phi^0 \to
b\bar{b}\mu\bar{\mu} +X$) at the CERN Large Hadron Collider within the
framework of the minimal supersymmetric model.


title: Indication for Large Rescatterings in Charmless Rare B Decays

abstract:
  The current wealth of charmless B decay data may suggest the presence of
final state rescattering. In a factorized amplitude approach, better fits are
found by incorporating two SU(3) rescattering phase differences, giving delta ~
65 degree and sigma ~ 90 - 100 degree. Fitting with unitarity phase phi_3 as a
fit parameter gives phi_3 ~ 96 degree, the CP asymmetries A_{pi pi}, S_{pi pi}
agree better with BaBar, and the sigma phase is slightly lower. Keeping phi_3 =
60 degree fixed in fit gives S_{pi pi} ~-0.9, which agrees better with Belle.
With the sizable delta, sigma rescattering phases as fitted, many direct CP
asymmetries flip sign, and B0 --> pi0 pi0, K- K+ rates are of order 10^{-6},
which can be tested soon.


title: NNLO tau+tau- production cross section at threshold

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


title: New Experimental Limits on Macroscopic Forces Below 100 Microns

abstract:
  Results of an experimental search for new macroscopic forces with Yukawa
range between 5 and 500 microns are presented. The experiment uses 1 kHz
mechanical oscillators as test masses with a stiff conducting shield between
them to suppress backgrounds. No signal is observed above the instrumental
thermal noise after 22 hours of integration time. These results provide the
strongest limits to date between 10 and 100 microns, improve on previous limits
by as much as three orders of magnitude, and rule out half of the remaining
parameter space for predictions of string-inspired models with low-energy
supersymmetry breaking. New forces of four times gravitational strength or
greater are excluded at the 95% confidence level for interaction ranges between
200 and 500 microns.


title:
|V_{cb}| and |V_{ub}| Determinations from Inclusive Semileptonic B
  Decays

abstract:
  The determinations of |V_{cb}| and |V_{ub}| from inclusive semileptonic B
decays are reviewed. A comparison of the light-cone approach with the heavy
quark expansion approach is made. The perspective for further improvement of
the |V_{cb}| and |V_{ub}| determinations is discussed.


title:
Transverse spin effects in proton-proton scattering and $Q \bar Q$
  production

abstract:
  We discuss transverse spin effects caused by the spin-flip part of the
Pomeron coupling with the proton. The predicted spin asymmetries in
proton-proton scattering and QQ production in proton-proton and lepton-proton
reactions are not small and can be studied in future polarized experiments.


title: Pion Structure at High and Low Energies in Chiral Quark Models

abstract:
  Low and high energy properties of the pion are reviewed in the framework of
chiral quark models. Particular emphasis is put on the simplest version of the
SU(2) NJL model as prototype. The role of gauge invariance in this kind of
calculations is stressed. The results are used as initial conditions for
perturbative QCD evolution equations. At leading order the quark model scale is
$\mu_0 \sim 320 {\rm MeV} $ as determined from the pion distribution functions
and the pion distribution amplitudes.


title: Diffractive hadron leptoproduction and SPD

abstract:
  We discuss diffractive hadron leptoproduction in terms of skewed gluon
distributions and within two-gluon exchange model. Connection of the two-gluon
approach with skewed gluon distributions is found. The double spin asymmetries
for longitudinally polarized leptons and transversely polarized protons in
diffractive vector meson and $Q \bar Q$ production at high energies within the
two-gluon model is analysed.
  The asymmetry predicted for meson production is found to be quite small. The
$A_{lT}$ asymmetry for $Q \bar Q$ production is large and can be used to obtain
information on the polarized skewed gluon distributions in the proton.


title:
Scattering amplitudes for e^+e^- --> 3 jets at next-to-next-to-leading
  order QCD

abstract:
  We present the calculation of the fermionic contribution to the QCD two-loop
amplitude for e^+e^- --> q qbar g.


title: Jet quenching in heavy ion collisions at LHC

abstract:
  We discuss the potential information about highly excited QCD-matter provided
by medium-induced partonic energy loss, known as ``jet quenching''. In
particular, with its large acceptance hadronic and electromagnetic calorimetry,
the Compact Muon Solenoid detector at LHC collider is a promising device to
study these effects. We present physics simulations of observables such as the
jet distribution with impact parameter, the azimuthal anisotropy of jet
quenching, and the effects of b-quark energy loss on the high-mass dimuon
continuum and secondary charmonium production.


title: Generalized Statistics and the Formation a Quark-Gluon Plasma

abstract:
  The aim of this paper is to investigate the effect of a non-extensive form of
statistical mechanics proposed by Tsallis on the formation of a quark-gluon
plasma (QGP). We suggest to account for the effects of the dominant part of the
{\itshape long-range} interactions among the constituents in the QGP by a
change in the statistics of the system in this phase, and we study the
relevance of this statistics for the phase transition. The results show that
small deviations ($\approx 10%$) from Boltzmann-Gibbs statistics in the QGP
produce a noticeable change in the phase diagram, which can, in principle, be
tested experimentally.


title: Antimatter regions in the baryon-dominated Universe

abstract:
  Quantum fluctuations of a complex, baryonic charged scalar field caused by
inflation can generate large domains, which convert later into antimatter
regions. As a result the Universe can become globally matter-dominated, with
minor contribution of antimatter regions. The distribution and evolution of
such antimatter regions could cause every galaxy to be a harbour of an
anti-star globular cluster. At the same time, the scenario does not lead to
large-scale isocuvature perturbations, which would disturb observable CMB
anisotropy. The existence of one of such antistar globular cluster in our
Galaxy does not contradict the observed $\gamma$-ray background, but the
expected fluxes of $\bar{\rm ^4He}$ and $\bar{\rm ^3He}$ from such an
antimatter object are definitely accessible to the sensitivity of the coming
AMS--02 experiment.


title: Gaussian Sum-Rules, Scalar Gluonium, and Instantons

abstract:
  Gaussian sum-rules relate a QCD prediction to a two-parameter
Gaussian-weighted integral of a hadronic spectral function, providing a clear
conceptual connection to quark-hadron duality. In contrast to Laplace
sum-rules, the Gaussian sum-rules exhibit enhanced sensitivity to excited
states of the hadronic spectral function. The formulation of Gaussian sum-rules
and associated analysis techniques for extracting hadronic properties from the
sum-rules are reviewed and applied to scalar gluonium. With the inclusion of
instanton effects, the Gaussian sum-rule analysis results in a consistent
scenario where the gluonic resonance strength is spread over a broad energy
range below 1.6 GeV, and indicates the presence of gluonium content in more
than one hadronic state.


title: Axial amplitudes for Delta excitation in chiral quark models

abstract:
  We study the axial amplitudes for the N-Delta transition in models with
quarks and chiral mesons. A set of constraints on the pion field is imposed
which enforces PCAC and the off-diagonal Goldberger-Treiman relation. The quark
contribution to the amplitudes in general strongly underestimates the C^A_5
amplitude as well as the piNDelta strong coupling constant. We show that the
results are considerably improved in models that, in addition to the pion
cloud, incorporate a fluctuating sigma field inside the baryon.


title:
Weak Corrections to Three-Jet Production in Electron-Positron
  Annihilations: 1) The Factorisable Contributions

abstract:
  We report on the calculation of the factorisable one-loop weak-interaction
corrections to the initial and final states for three-jet observables in
electron-positron annihilations. We show that such corrections are of a few
percent at $\sqrt s=M_Z$. Hence, while their impact is not dramatic in the
context of LEP1 and SLC, where the total error on the measured value of
$\alpha_{\mathrm{S}}$ is larger, at a future Linear Collider, running at the
$Z$ mass peak (e.g., GigaZ), they ought to be taken into account in the
experimental fits, as here the uncertainty on the value of the strong coupling
constant is expected to be at the 0.1% level or even smaller. The calculation
has been performed using helicity amplitudes so that it can be applied to the
case of polarised beams.


title: Renormalization of the Minimal Supersymmetric Standard Model

abstract:
  The renormalization of the Minimal Supersymmetric Standard Model (MSSM) is
presented. We describe symmetry identities that constitute a framework in which
the MSSM is completely characterized and renormalizability can be proven.
Furthermore, we discuss applications of this framework for the determination of
symmetry-restoring counterterms, the gauge dependence of tan(beta) and the
derivation of non-renormalization theorems.


title: Strange Form Factors in Neutrino Scattering

abstract:
  The possibility to determine the axial strange form factor of the nucleon
from neutrino scattering experiments is studied. The existing experimental
information is reviewed and several related observables which could be measured
in the near future at new neutrino facilities are studied in detail. Elastic
scattering from S=T=0 nuclei is also briefly considered.


title:
Manifestations of anomalous glue: light-mass exotic mesons and the
  eta-prime nucleon coupling constant

abstract:
  The light-mass exotics with J^{PC}=1^{-+} observed at BNL and CERN may have a
simple explanation as dynamically generated resonances in eta-prime pi
rescattering in the final state interaction. This dynamics is mediated by the
same anomalous glue which also generates the large mass of the eta-prime. OZI
violating processes are also potentially important to eta-prime production in
proton-proton collisions close to threshold.


title: Rare B_s->nu nu gamma decay beyond the standard model

abstract:
  Using the most general model independent form of the effective Hamiltonian
the rare decay B_s->nu nu gamma is studied. The sensitivity of the photon
energy distribution and branching ratio to new Wilson coefficients are
investigated.


title: Right-handed Neutrinos in Low-Energy Neutrino-Electron Scattering

abstract:
  In this paper a scenario admitting the participation of the exotic scalar
coupling of the right-handed neutrinos in addition to the standard vector and
axial couplings of the left-handed neutrinos in the weak interactions is
considered. The research is based on the low-energy $(\nu_{\mu} e^{-})$ and
$(\nu_{e} e^{-})$ scattering processes. The main goal is to show how the
presence of the right-handed neutrinos in the above processes changes the
laboratory differential cross section in relation to the Standard Model
prediction. Both processes are studied at the level of the four-fermion point
interaction. Neutrinos are assumed to be polarized Dirac fermions and to be
massive. In the laboratory differential cross section, the new interference
term between the standard vector coupling of the left-handed neutrinos and
exotic scalar coupling of the right-handed neutrinos appears which does not
vanish in the limit of massless neutrino. This additional contribution,
including information about the transverse components of neutrino polarization,
generates the azimuthal asymmetry in the angular distribution of the recoil
electrons. This regularity would be a signature of the participation of the
right-handed neutrinos in the neutrino-electron scattering. The future
low-energy high-precision neutrino-electron scattering experiments using the
strong and polarized artificial neutrino source would allow to search for the
exotic effects coming from the R-handed neutrinos.


title: Predictions of the most minimal see-saw model

abstract:
  We derive the most minimal see-saw texture from an extra-dimensional
dynamics. It predicts theta_13 = 0.078 \pm 0.015 and m_ee = 2.6 \pm 0.4 meV.
Assuming thermal leptogenesis, the sign of the CP-phase measurable in neutrino
oscillations, together with the sign of baryon asymmetry, determines the order
of heavy neutrino masses. Unless heavy neutrinos are almost degenerate,
successful leptogenesis fixes the lightest mass. Depending on the sign of the
neutrino CP-phase, the supersymmetric version of the model with universal soft
terms at high scale predicts BR(mu --> e gamma) or BR(tau --> mu gamma), and
gives a lower bound on the other process.


title: KtJet: A C++ implementation of the Kt clustering algorithm

abstract:
  A C++ implementation of the Kt jet algorithm for high energy particle
collisions is presented. The time performance of this implementation is
comparable to the widely used Fortran implementation. Identical algorithmic
functionality is provided, with a clean and intuitive user interface and
additional recombination schemes. A short description of the algorithm and
examples of its use are given.


title:
A numerical evaluation of the scalar hexagon integral in the physical
  region

abstract:
  We derive an analytic expression for the scalar one-loop pentagon and hexagon
functions which is convenient for subsequent numerical integration. These
functions are of relevance in the computation of next-to-leading order
radiative corrections to multi-particle cross sections. The hexagon integral is
represented in terms of n-dimensional triangle functions and (n+2)-dimensional
box functions. If infrared poles are present this representation naturally
splits into a finite and a pole part. For a fast numerical integration of the
finite part we propose simple one- and two-dimensional integral
representations. We set up an iterative numerical integration method to
calculate these integrals directly in an efficient way. The method is
illustrated by explicit results for pentagon and hexagon functions with some
generic physical kinematics.


title: Can we build a sensible theory with broken charge and colour symmetries?

abstract:
  Charge and colour symmetries are broken using the vevs of scalar fields, but
it is shown the theory possesses a photon-like massless particle and
electroweak interactions almost identical to those of the Standard Model. We
consider experimental signatures of this theory.


title: CP Violation: The Past as Prologue

abstract:
  CP violation is now measured by three numbers: \epsilon and
{\epsilon{^{\prime} for the K^{0} system and sin2\beta for B^{0}. A future
measurement of the analogue of {\epsilon{^{\prime} for the B system would end
any possibility of a Superweaklike Theory. Future frontiers in CP violation are
briefly discussed.


title: Minimal Scalar Sector of 3-3-1 Models without Exotic Electric Charges

abstract:
  We study the minimal set of Higgs scalars, for models based on the local
gauge group $SU(3)_c \otimes SU(3)_L \otimes U(1)_X$ which do not contain
particles with exotic electric charges. We show that only two Higgs $SU(3)_L$
triplets are needed in order to properly break the symmetry. The exact
tree-level scalar mass matrices resulting from symmetry breaking are calculated
at the minimum of the most general scalar potential, and the gauge bosons are
obtained, together with their couplings to the physical scalar fields. We show
how the scalar sector introduced is enough to produce masses for fermions in a
particular model which is an $E_6$ subgroup. By using experimental results we
constrain the scale of new physics to be above 1.3 TeV.


title: B decay shape variables and the precision determination of |Vcb| and mb

abstract:
  We present expressions for shape variables of B decay distributions in
several different mass schemes, to order $\alpha_s^2\beta_0$ and
(Lambda_{QCD}/mb)^3. Such observables are sensitive to the b quark mass and
matrix elements in the heavy quark effective theory, and recent measurements
allow precision determinations of some of these parameters. We perform a
combined fit to recent experimental results from CLEO, BABAR, and DELPHI, and
discuss the theoretical uncertainties due to nonperturbative and perturbative
effects. We discuss the possible discrepancy between the OPE prediction, recent
BABAR results and the measured branching fraction to D and D* states. We find
|Vcb| = (40.8 +- 0.9) x 10^{-3} and mb^{1S} = 4.74 +- 0.10 GeV, where the
errors are dominated by experimental uncertainties.


title: $B\to f_{0}(980) K^{(*)}$ decays and final state interactions

abstract:
  We study the exclusive decays of $B\to f_{0}(980) K^{(*)}$ in the framework
of the perturbative QCD by identifying the $f_{0}(980)$ as the composition of
$\bar{s} s$ and $\bar{n}n=(\bar{u}u+\bar{d}d)/\sqrt{2}$. We find that the
influence of the $\bar{n} n$ content on the predicted branching ratios is
crucial. We discuss the possible rescattering and gluonium states which could
enhance the branching ratios of considered decays. We point out that the CP
asymmetry in $B\to f_{0}(980) K_{S,L}$ could be a new explorer of
$\sin2\phi_{1}$.


title:
General amplitude of the n - vertex one-loop process in a strong
  magnetic field

abstract:
  A general analysis of the n-vertex loop amplitude in a strong magnetic field
is performed, based on the asymptotic form of the electron propagator in the
field. As an example, the photon-neutrino processes are considered, where one
vertex in the amplitude is of a general type, and the other vertices are of the
vector type. It is shown, that for odd numbers of vertices only the SV_1 ...
V_{n-1} amplitude grows linearly with the magnetic field strength, while for
even numbers of vertices the linear growth takes place only in the amplitudes
PV_1 ... V_{n-1}, VV_1 ... V_{n-1} and AV_1 ... V_{n-1}. The general
expressions for the amplitudes of the processes gamma gamma -> nu bar nu (in
the framework of the model with the effective nu nu e e - coupling of a scalar
type) and gamma gamma -> nu bar nu gamma (in the framework of the Standard
Model) for arbitrary energies of particles are obtained. A comparison with
existing results is performed.


title:
NLO corrections to the polarized Drell-Yan cross section in
  proton-proton collisions

abstract:
  We present the full next-to-leading order (NLO) corrected inclusive cross
section for massive lepton pair production in longitudinally polarized
proton-proton collisions. All QCD partonic subprocesses have been included
provided the lepton pair is created by a virtual photon, which is a valid
approximation for $Q<50 {\rm GeV}$. Like in unpolarized proton-proton
scattering the dominant subprocess is given by the $q(\bar q)g$-channel so that
massive lepton pair production provides us with an excellent method to measure
the spin density of the gluon. Using our calculations we give predictions for
the longitudinal spin asymmetry measurements at the RHIC.


title: B Physics and Supersymmetry

abstract:
  In this talk, I briefly review a selection of SUSY effects in B physics.
First, I consider models with Minimal Flavour Violation. Then I discuss SUSY
models with new sources of flavour violation in squark mass matrices, analyzing
present constraints and possible developments with forthcoming data on b -> s
and b -> d transitions.


title: Surviving the renormalon in heavy quark potential

abstract:
  We show that the Borel resummed perturbative static potential at N_f=0
converges well, and is in a remarkable agreement with the quenched lattice
calculation at distances 1/r > 660 MeV. This shows that Borel resummation is
very good at handling the renormalon in the static potential (and in the pole
mass), and allows one to use the pole mass in perturbative calculation of heavy
quark physics.


title: On the pattern of Casimir scaling violation in gluodynamics

abstract:
  Results of lattice analysis indicate that the static potential in SU(3) gauge
theory is proportional to eigenvalue of quadratic Casimir operator for the
corresponding representation with a good accuracy. We discuss the mechanism of
possible deviations from the Casimir scaling in gluodynamics in terms of
correlators of path-ordered gauge-invariant operators defined on the worldsheet
of the confining string.


title: Neutralino Dark Matter beyond CMSSM Universality

abstract:
  We study the effect of departures from SUSY GUT universality on the
neutralino relic density and both its direct detection and indirect detection,
especially by neutrino telescopes. We find that the most interesting models are
those with a value of $M_3|_{GUT}$ lower than the universal case.


title: On three-body B decays to charm

abstract:
  I briefly describe the use of the three-body decay modes $B^0 \to D^{(*)-}
D^{(*)0} K^+$ to investigate open issues in charmed meson spectroscopy, and of
the time dependent $B^0 (\bar {B^0}) (t) \to D^{-} D^{+} \pi^0$ transitions for
a measurement of $\cos (2 \beta)$.


title:
Neutralino relic density from direct non-equilibrium production and
  intermediate scales

abstract:
  We review the calculation of the LSP relic density in alternative
cosmological scenarios where contributions from direct decay production are
important. We study supersymmetric models with intermediate unification scale.
We find concrete scenarios where the reheating temperature is of order one GeV
($M_I\sim 10^{12}$) and below. If the case that this reheating temperature is
associated to the decay of oscillating moduli fields appearing in string
theories, we show that the LSP relic density considerably increases with
respect to the standard radiation-dominated case by the effect of the direct
non-thermal production by the modulus field. The LSP can become a good dark
matter candidate ($0.01-0.1 \gsim \Omega h^2 \lsim 0.3-1$) for $M_I\sim
10^{12}-10^{14}$ Gev and $m_\phi\sim 1-10$ TeV.


title: Particle oscillations in external chaotic fields

abstract:
  We review here the development of the general formalism for the study of
fermion propagation in the presence of stochastic media. This formalism allows
the systematic derivation of evolution equations for averaged quantities as
survival probabilities and higher order distribution moments. The formalism
equally applies to any finite dimensional Schr\"{o}dinger equation in the
presence of a stochastic external field. New integrodifferential equations
valid for finite correlated processes are obtained for the first time. For the
particular case of exponentially correlated processes a second order ordinary
equation is obtained. As a consequence, the Redfield equation valid for
Gaussian delta-correlated noise is rederived in a simple way: it has been
obtained directly and as the zero-order term of an asymptotic expansion in the
inverse of the correlation length. The formalism, together with the quantum
correlation theorem is applied to the computation of higher moments and
correlation functions. It is shown that equal and unequal time correlators
follow similar differential equations.


title:
Single Higgs boson production at future linear colliders including
  radiative corrections

abstract:
  The next generation of high energy e+ e- linear colliders is expected to
operate at \sqrt{s} \gtsim 500 GeV. In this energy range the WW fusion channel
dominates the Higgs boson production cross section e+ e- -> \bar\nu \nu
h^0/H^0. We calculate the one-loop corrections to this process due to fermion
and sfermion loops within the MSSM. We perform a detailed numerical analysis of
the total cross section and the distributions of the rapidity, the transverse
momentum and the production angle of the Higgs boson. The fermion-sfermion
correction is substantial being of the order of -10% and is dominated by the
fermion loops. In addition, we explore the possibility of polarized e+ / e-
beams. In the so-called "intense coupling" scenario the production of the heavy
Higgs boson H^0 is also discussed.


title:
Detect Gluon Polarisation at BNL-RHIC Through J/\psi Pair Production
  Process

abstract:
  Our recent study shows that the double spin asymmetry of J/\psi pair
production is measurable in polarised p-p collision at RHIC in near future. And
hence it enables us to extract the polarised gluon distribution function \Delta
G (x).


title: Power corrections in heavy-to-light decays at large recoil energy

abstract:
  I briefly present recent work on QCD power corrections in heavy-to-light
meson decays, using an effective field theory approach.


title:
Gaugino and Higgsino Coannihilations I: Neutralino-Neutralino
  Interactions

abstract:
  We present exact analytic cross sections for all neutralino-neutralino
coannihilations into two-body tree level final states. These expressions allow
the calculation of important contributions to the neutralino relic abundance
over large regions of mSUGRA parameter space and are particularly useful in
theories with non-universal gaugino masses.


title:
World-line techniques for resumming gluon radiative corrections at the
  cross-section level

abstract:
  We employ the Polyakov world-line path-integral version of QCD to identify
and resum at leading perturbative order enhanced radiative gluon contributions
to the Drell-Yan type ($q\bar{q}$ pair annihilation) cross-sections. We
emphasize that this is the first time that world-line techniques are applied to
cross-section calculations.


title: Sensitivity to theta(13) of the CERN to Gran Sasso neutrino beam

abstract:
  The sensitivity of the present CNGS beam to the sub-dominant $\nu_\mu
\leftrightarrow \nu_e$ oscillations in the region indicated by the atmospheric
neutrino experiments is investigated. In particular, we present a revised
analysis of the OPERA detector and discuss the sensitivity to $\theta_{13}$ of
ICARUS and OPERA combined. We show that the CNGS beam optimised for $\nu_\tau$
appearance, will improve significantly (about a factor 5) the current limit of
CHOOZ and explore most of the region
$\sin^22\theta_{13}\simeq\mathcal{O}(10^{-2})$.


title: Strong interaction effects in semileptonic B decays

abstract:
  Strong interaction effects are addressed in connection to extracting
|V_{cb}|. A comprehensive approach is described not relying on a 1/m_c
expansion; it allows a percent accuracy without ad hoc assumptions about
higher-order effects. An alternative to the M_X^2 variable is proposed
improving convergence. Intrinsic hardness of integrated observables with a cut
on E_\ell is discussed; it can be responsible for the behavior of <M_X^2>
reported by BaBar. Consequences of the proximity to the `BPS' limit are
considered.


title:
The two-gluon components of the eta and eta' mesons to leading-twist
  accuracy

abstract:
  We critically reexamine the formalism for treating the leading-twist
contributions from the two-gluon Fock components occurring in hard processes
that involve eta and eta' mesons and establish a consistent set of conventions
for the definition of the gluon distribution amplitudes, the anomalous
dimensions as well as the projector of a two-gluon state onto an eta or eta'
state. We calculate the eta, eta'--photon transition form factor to order
alpha_s and show the cancellation of the collinear and UV singularities
explicitly. An estimate of the lowest Gegenbauer coefficients of the gluon and
quark distribution amplitudes is obtained from a fit to the eta, eta'--photon
transition form factor data. In order to elucidate the role of the two-gluon
Fock component further, we analyze electroproduction of eta, eta' mesons and
the g*g* eta (eta') vertex.


title:
Relativistic Instant--Form Approach to the Structure of Two-Body
  Composite Systems. II. Nonzero Spin

abstract:
  The relativistic approach to electroweak properties of two-particle composite
systems developed in previous work is generalized here to the case of nonzero
spin. This approach is based on the use of the instant form of relativistic
Hamiltonian dynamics. The generalization makes use of a special mathematical
technique for the parametrization of matrix elements of electroweak current
operators in terms of form factors. In this technique the parametrization is a
realization of theWigner--Eckart theorem on the Poincar\'e group and form
factors are reduced matrix elements. As in the case of zero spin the
electroweak current matrix element satisfies the relativistic covariance
conditions and in the case of electromagnetic current it also automatically
satisfies the conservation law. Physical approximations such as, for example,
the relativistic impulse approximation, are formulated in terms of reduced
matrix elements. The electromagnetic structure of $\rho$ meson is calculated as
an example of realization of the technique proposed.


title:
Investigation of Neutrino Properties in Experiments at Nuclear Reactors:
  Present Status and Prospects

abstract:
  This paper was submitted in Russian edition of Journal Physics of Atomic
Nuclei in 2001. The present status of experiments that are being performed at
nuclear reactors in order to seek the neutrino masses, mixing, and magnetic
moments, whose discovery would be a signal of the existence of physics beyond
the Standard Model, is considered, along with their future prospects.


title: Tests of Leptogenesis at Low Energy

abstract:
  The problem of testing leptogenesis from low energy experiments is discussed
following three different perspectives. Firstly, we review the prospects that
from low energy experiments we could reconstruct the neutrino Yukawa coupling
matrix and hence constrain the leptogenesis mechanism. We emphasize the fact
that the experimental determination of the phases and mixings in the light
neutrino mass matrix is irrelevant for leptogenesis, unless additional
information about the texture of the Yukawa coupling matrix is provided by
other observables. Secondly, we show how the discovery of an extra gauge boson
could bring us important indications for leptogenesis. Thirdly, we discuss the
problems one encounters when attempting to build a leptogenesis mechanism at a
directly testable scale, presenting an explicit model which avoids these
problems.


title: Radiative Corrections to the $K_{e3}^{\pm}$ Decay Revised

abstract:
  We consider the lowest order radiative corrections for the decay $K^{\pm}\to
\pi^0 e^{\pm} \nu$, usually referred as $K_{e3}^{\pm}$ decay. This decay is the
best way to extract the value of the $V_{us}$ element of the CKM matrix. The
radiative corrections become crucial if one wants a precise value of $V_{us}$.
The existing calculations were performed in the late 60's \cite{B,G} and are in
disagreement. The calculation in \cite{G} turns out to be ultraviolet cutoff
sensitive. The necessity of precise knowledge of $V_{us}$ and the contradiction
between the existing results constitute the motivation of our paper.
  We remove the ultraviolet cutoff dependence by using A.Sirlin's prescription;
we set it equal to the $W$ mass. We establish the whole character of small
lepton mass dependence based on the renormalization group approach. In this way
we can provide a simple explanation of Kinoshita--Lee--Nauenberg cancellation
of singularities in the lepton mass terms in the total width and pion spectrum.
We give an explicit evaluation of the structure--dependent photon emission
based on ChPT in the lowest order. We estimate the accuracy of our results to
be at the level of 1%. The corrected total width is $\Gamma=\Gamma_0(1+\delta)$
with $\delta=0.02\pm0.0002$. Using the formfactor value $f_+(0)=0.9842\pm
0.0084$ calculated in \cite{CKNRT} leads to $|V_{us}|=0.2172 \pm0.0055$.


title: 20+ years of Inflation

abstract:
  In this talk I will review the present status of inflationary cosmology and
its emergence as the basic paradigm behind the Standard Cosmological Model,
with parameters determined today at better than 10% level from CMB and LSS
observations. I will also discuss the recent theoretical developments on the
process of reheating after inflation and model building based on string theory
and D-branes.


title:
Effects of charged Higgs boson and QCD corrections in $\bar B \to D \tau
  \bar\nu_{\tau}$

abstract:
  We study effects of charged Higgs boson exchange in $\bar B \to D \tau
\bar\nu_{\tau}$. The Yukawa couplings of Model II of two-Higgs-doublet model,
which has the same Yukawa couplings as MSSM, is considered. We evaluate the
decay rate including next-to-leading QCD corrections and estimate uncertainties
in the theoretical calculation. Our analysis will contribute to probe an
extended Higgs sector at B factory experiments.


title: C, P, T are Broken. Why Not CPT?

abstract:
  Classification of effects of violation of seven symmetries -- C, P, T, CP,
PT, TC, and CPT -- is discussed. A graphic mnemonic scheme -- CPT-cube -- is
suggested and illustrated by simple examples.


title: Realistic construction of split fermion models

abstract:
  The Standard Model flavor structure can be explained in theories where the
fermions are localized on different points in a compact extra dimension. We
show that models with two bulk scalars compactified on an orbifold can produce
such separations in a natural way. We study the shapes and overlaps of the
fermion wave functions. We show that, generically, realistic models of Gaussian
overlaps are unnatural since they require very large Yukawa couplings between
the fermions and the bulk scalars. We give an example of a five dimensional two
scalar model that accounts naturally for the observed quark masses, mixing
angles and CP violation.


title: How do we know the charges of quarks?

abstract:
  Experimental tests performed in the past to determine quark charges are
reviewed. It is pointed out that only experiments involving two real photons
can really distinguish between the Gell-Mann-Zweig scheme of fractional charges
from the Han-Nambu scheme of integer charges in the context of a theory with
gauged colour interactions. While many experiments with two real photons have
been performed, the only experiment with a definitive statement on quark
charges was one on hard scattering of real photons at CERN. Some theoretical
issues not fully resolved are pointed out.


title: The neutrino charge radius is a physical observable

abstract:
  We present a method which allows, at least in principle, the direct
extraction of the gauge-invariant and process-independent neutrino charge
radius (NCR) from experiments. Under special kinematic conditions, the
judicious combination of neutrino and anti-neutrino forward differential
cross-sections allows the exclusion of all target-dependent contributions, such
as gauge-independent box-graphs, not related to the NCR. We show that the
remaining contributions contain universal, renormalization group invariant
combinations, such as the electroweak effective charge and the running mixing
angle, which must be also separated out. By considering the appropriate number
of independent experiments we show that one may systematically eliminate these
universal terms, and finally express the NCR entirely in terms of physical
cross-sections. Even though the kinematic conditions and the required precision
may render the proposed experiments unfeasible, at the conceptual level the
analysis presented here allows for the promotion of the NCR into a genuine
physical observable.


title: Electroweak Penguins and Large Nc

abstract:
  I review the progress made in the calculation of the electroweak penguins
Q_{7,8} in the framework of the Hadronic Approximation to large-Nc QCD, and
give an update of results.


title: Varying Constants in Brane World Scenarios

abstract:
  Higher-dimensional theories imply that some constants, such as the
gravitational constant and the strength of the gauge-couplings, are not
fundamental constants. Instead they are related to the sizes of the
extra--dimensional space, which are moduli fields in the four--dimensional
effective theory. We study the cosmological evolution of the moduli fields
appearing in brane world scenarios and discuss the implications for varying
constants.


title: The Reconstruction of Supersymmetric Theories at High Energy Scales

abstract:
  The reconstruction of fundamental parameters in supersymmetric theories
requires the evolution to high scales, where the characteristic regularities in
mechanisms of supersymmetry breaking become manifest. We have studied a set of
representative examples in this context: minimal supergravity and a left--right
symmetric extension; gauge mediated supersymmetry breaking; and superstring
effective field theories. Through the evolution of the parameters from the
electroweak scale the regularities in different scenarios at the high scales
can be unravelled if precision analyses of the supersymmetric particle sector
at e+ e- linear colliders are combined with analyses at the LHC.


title: Gauge equivalence in QCD: the Weyl and Coulomb gauges

abstract:
  The Weyl-gauge ($A_0^a=0)$ QCD Hamiltonian is unitarily transformed to a
representation in which it is expressed entirely in terms of gauge-invariant
quark and gluon fields. In a subspace of gauge-invariant states we have
constructed that implement the non-Abelian Gauss's law, this unitarily
transformed Weyl-gauge Hamiltonian can be further transformed and, under
appropriate circumstances, can be identified with the QCD Hamiltonian in the
Coulomb gauge. We demonstrate an isomorphism that materially facilitates the
application of this Hamiltonian to a variety of physical processes, including
the evaluation of $S$-matrix elements. This isomorphism relates the
gauge-invariant representation of the Hamiltonian and the required set of
gauge-invariant states to a Hamiltonian of the same functional form but
dependent on ordinary unconstrained Weyl-gauge fields operating within a space
of ``standard'' perturbative states. The fact that the gauge-invariant
chromoelectric field is not hermitian has important implications for the
functional form of the Hamiltonian finally obtained. When this nonhermiticity
is taken into account, the ``extra'' vertices in Christ and Lee's Coulomb-gauge
Hamiltonian are natural outgrowths of the formalism. When this nonhermiticity
is neglected, the Hamiltonian used in the earlier work of Gribov and others
results.


title:
The O(N) linear sigma model at finite temperature beyond the Hartree
  approximation

abstract:
  We study the O(N) linear sigma model with spontaneous symmetry breaking,
using a Hartree-like ansatz with a classical field and variational masses. We
go beyond the Hartree approximation by including the two-loop contribution, the
sunset diagram, using the 2PPI expansion. We have computed numerically the
effective potential at finite temperature. We find a phase transition of second
order, while it is first order in the Hartree approximation. We also discuss
some implications of the fact that in this order, the decay of the sigma into
two pions affects the thermal diagrams.


title:
Thermal evolution of the chiral condensate in SU(2) and SU(3) Chiral
  Perturbation Theory

abstract:
  The temperature evolution of the chiral condensates in a gas made of pions,
kaons and etas is studied within the framework of SU(2) and SU(3) Chiral
Perturbation Theory. We describe the temperature dependence of the quark
condensates by using the meson meson scattering phase shifts in a second order
virial expansion. We find that the SU(3) formalism yields an extrapolated
melting temperature for the non-strange condensates which is lower by about
20-30 MeV than within SU(2). In addition our results show that the strange
condensate melting is slower than that of the non-strange, due to the different
strange and non-strange quark masses.


title: Stability of Fermi ball against deformation from spherical shape

abstract:
  The stability of a Fermi ball (F-ball), which is a kind of non-topological
soliton accompanying the breakdown of the approximate $Z_2$ symmetry, is
investigated in three situations: the case it is electrically neutral, the case
it is electrically charged and unscreened, and the case it is electrically
charged and screened. We argue only the third case is physically meaningful
since the neutral F-ball is unstable and the case of the unscreened charged one
is observationally excluded when it has a sizable contribution to CDM. We found
that the energy scale of the breakdown of the approximate $Z_2$ symmetry $v$
should satisfy $v<3\times 10^6 {GeV}$ if the F-ball is a main component of CDM.


title: On Vector Goldstone Boson

abstract:
  The possibility that higher dimensional field theories are broken
spontaneously, through the usual Nambu-Goldstone mechanism, to 4-dimension is
explored. As a consequence, vector Goldstone bosons can arise in this breaking
of Lorentzian symmetry from higher dimension to 4-dimension. This can provide a
simple mechanism for reduction to 4-dimension in theories with extra
dimensions.


title: The nucleon's strange electromagnetic and scalar matrix elements

abstract:
  Quenched lattice QCD simulations and quenched chiral perturbation theory are
used together for this study of strangeness in the nucleon. Dependences of the
matrix elements on strange quark mass, valence quark mass and momentum transfer
are discussed in both the lattice and chiral frameworks. The combined results
of this study are in good agreement with existing experimental data and
predictions are made for upcoming experiments. Possible future refinements of
the theoretical method are suggested.


title:
Coexistence of pion condensation and color superconductivity in two
  flavor quark matter

abstract:
  We show that the superconducting 2SC phase at high density and normal chiraly
broken quark phase at low density is separated by the mixed non-uniform phase
along the baryon density line.


title:
How precisely can we reduce the three-flavor neutrino oscillation to the
  two-flavor one only from (\delta m^2_{12})/(\delta m^2_{13}) <~ 1/15 ?

abstract:
  We derive the reduction formula, which expresses the survival rate for the
three-flavor neutrino oscillation by the two-flavor one, to the next-to-leading
order in case there is one resonance due to the matter effect. We numerically
find that the next-to-leading reduction formula is extremely accurate and the
improvement is relevant for the precision test of solar neutrino oscillation
and the indirect measurment of CP violation in the leptonic sector. We also
derive the reduction formula, which is slightly different from that previously
obtained, in case there are two resonances. We numerically verify that this
reduction formula is quite accurate and is valid for wider parameter region
than the previously obtained ones are.


title: T violation in $\Lambda_b\to\Lambda\ell^+\ell^-$ decays

abstract:
  We examine the T-odd transverse lepton and $\Lambda$ polarizations in the
baryonic decays of $\Lambda_b\to\Lambda l^+l^- (l=e ,\mu)$ to study the T
violating effects. We show that the lepton polarizations are suppressed but the
$\Lambda$ ones can be as large as 50% in CP violating theories beyond the
standard model such as the SUSY models, which can be tested in various future
hadron colliders.


title: An introduction to the Generalized Parton Distributions

abstract:
  The concepts of Generalized Parton Distributions (GPD) are reviewed in an
introductory and phenomenological fashion. These distributions provide a rich
and unifying picture of the nucleon structure. Their physical meaning is
discussed. The GPD are in principle measurable through exclusive deeply virtual
production of photons (DVCS) or of mesons (DVMP). Experiments are starting to
test the validity of these concepts. First results are discussed and new
experimental projects presented, with an emphasis on this program at Jefferson
Lab.


title: Delbruck scattering and the g-factor of a bound electron

abstract:
  The leading contribution of the light-by-light scattering effects to g-factor
of a bound electron is derived. The corresponding amplitude is expressed in
terms of low-energy Delbruck scattering of a virtual photon. The result reads
Delta g = (7/216) alpha (Z alpha)^5.


title:
Power series distributions in clan structure analysis: new observables
  in strong interactions

abstract:
  We present a new thermodynamical approach to multiparticle production in high
energy hadronic interactions, making use of the formalism of infinitely
divisible power series distributions. This approach allows us to define new
observables, linked to the system fugacity, which characterise different
classes of events.


title: A comment on hadronic charm decays

abstract:
  We give arguments in favor of the compatibility with standard physics of some
large nonleptonic branching fractions in Cabibbo--forbidden $D^+$ decays,
contrary to a recent claim in the literature.


title:
Forward-backward multiplicity correlations in e+e- annihilation and pp
  collisions and the weighted superposition mechanism

abstract:
  Forward-backward multiplicity correlations in symmetric collisions are
calculated independently of the detailed form of the corresponding multiplicity
distribution. Applications of these calculations to e+e- annihilation and ppbar
collisions confirm the existence of the weighted superposition mechanism of
different classes of substructures or components. When applied to ppbar
collisions in particular, clan concept and its particle leakage from one
hemisphere to the opposite one become of fundamental importance. The increase
with c.m. energy of the correlation strength as well as the behaviour of the
average number of backward particles vs. the number of forward particles are
correctly reproduced.


title:
Leptogenesis via multiscalar coherent evolution with supersymmetric
  neutrino see-saw

abstract:
  A novel scenario of leptogenesis is investigated in the supersymmetric
neutrino see-saw model. The right-handed sneutrino $ {\tilde N} $ and the $
\phi $ field in the $ {\tilde L} H_u $ direction of the slepton and Higgs
doublets start together coherent evolution after the inflation with
right-handed neutrino mass $ M_N $ smaller than the Hubble parameter of
inflation. Then, after some period the motion of $ {\tilde N} $ and $ \phi $ is
drastically changed by the cross coupling $ M_N h_\nu {\tilde N}^* \phi \phi $
from the $ M_N N N $ and $ h_\nu N L H_u $ terms, and the significant
asymmetries of $ {\tilde N} $ and $ {\tilde L} $ are generated. The $ {\tilde
L} $ asymmetry is fixed later by the thermal effect as the lepton number
asymmetry for baryogenesis, while the $ {\tilde N} $ asymmetry disappears
through the decays $ {\tilde N} \to {\bar L} {\bar{\tilde H}}_u, {\tilde L}
H_u$ with almost the same rate but opposite final lepton numbers.


title: Effective Vertex for pi-gamma-gamma

abstract:
  The \pi^0\gamma\gamma vertex is used as an explicit example of the subtleties
connected with the application of equation of motion within Chiral Perturbation
Theory at the order O(p^6).


title:
Are Bose-Einstein Correlations emerging from correlations of
  fluctuations?

abstract:
  We demonstrate how Bose-Einstein correlations emerge from the correlations of
fluctuations allowing for their extremely simple and fast numerical modelling.
Both the advantages and limitations of this new method of implementation of BEC
in the numerical modelling of high energy multiparticle processes are outlined
and discussed. First applications to description of $e^+e^-$ data are given.


title:
Perturbative and Non-perturbative Lattice Calculations for the Study of
  Parton Distributions

abstract:
  We discuss how lattice calculations can be a useful tool for the study of
structure functions. Particular emphasis is given to the perturbative
renormalization of the operators.


title: Identifying the Higgs Spin and Parity in Decays to Z Pairs

abstract:
  Higgs decays to Z boson pairs may be exploited to determine spin and parity
of the Higgs boson, a method complementary to spin-parity measurements in
Higgs-strahlung. For a Higgs mass above the on-shell ZZ decay threshold, a
model-independent analysis can be performed, but only by making use of
additional angular correlation effects in gluon-gluon fusion at the LHC and
gamma-gamma fusion at linear colliders. In the intermediate mass range, in
which the Higgs boson decays into pairs of real and virtual Z bosons, threshold
effects and angular correlations, parallel to Higgs-strahlung, may be adopted
to determine spin and parity, though high event rates will be required for the
analysis in practice.


title: Mixed phases of color superconducting quark matter

abstract:
  We examine electrically and color neutral quark matter in beta-equilibrium
focusing on the possibility of mixed phases between different color
superconducting phases. To that end we apply the Gibbs criterion to ensure
phase equilibrium and discuss the external conditions under which these mixed
phases can occur. Neglecting surface and Coulomb effects we find a rich
structure of different mixed phases with up to four components, including 2SC
and CFL matter as well as more ``exotic'' components, like a phase with us- and
ds-pairing but without ud-pairing. Preliminary estimates indicate, however,
that the mixed phases become unstable if surface and Coulomb effects are
included.


title:
Leading-twist two gluon distribution amplitude and exclusive processes
  involving eta and eta' mesons

abstract:
  I briefly review the formalism for treating the leading-twist two-gluon
states appearing in processes which involve eta and eta' mesons. The
constraints on the size of the lowest order Gegenbauer coefficients of the
two-gluon distribution amplitude are obtained from the fit to the eta and eta'
transition form factor data. The results are applied to chi -> eta eta (eta'
eta') decays and deeply virtual electroproduction of eta and eta' mesons.


title: BLM scale for the pion transition form factor

abstract:
  We review the determination of the NLO Brodsky-Lepage-Mackenzie (BLM)
renormalization scale for the pion transition form factor. We argue that the
prediction for the pion transition form factor is independent of the
factorization scale at every order in the strong coupling constant.


title: Phenomenological and Cosmological Implications of Neutrino Oscillations

abstract:
  I discuss the implications of neutrino oscillations for neutrino mass
patterns and mass matrices, and for neutrinoless double beta decay. I then go
on to discuss the implications for cosmological relic density and dark matter,
the galaxy structure limits on neutrino mass, nucleosynthesis, supernovae,
cosmic rays and gamma ray bursts.


title:
Resummation of transverse momentum and mass logarithms in DIS
  heavy-quark production

abstract:
  Differential distributions for heavy quark production depend on the heavy
quark mass and other momentum scales, which can yield additional large
logarithms and inhibit accurate predictions. Logarithms involving the heavy
quark mass can be summed in heavy quark parton distribution functions in the
ACOT factorization scheme. A second class of logarithms involving the
heavy-quark transverse momentum can be summed using an extension of
Collins-Soper-Sterman (CSS) formalism. We perform a systematic summation of
logarithms of both types, thereby obtaining an accurate description of
heavy-quark differential distributions at all energies. Our method essentially
combines the ACOT and CSS approaches. As an example, we present angular
distributions for bottom quarks produced in parity-conserving events at large
momentum transfers Q at the ep collider HERA.


title: General Formula for N-point One-loop Feynman Integrals

abstract:
  The negative dimensional integration method (NDIM) is a technique where
several difficulties concerning loop integration can be overcome. From usual
covariant gauges to complicated Coulomb gauge integrals, and even the trickiest
light-cone integrals one can apply the methodology of NDIM. In this work we
show how to construct a general formula -- we mean arbitrary exponents of
propagators, off-shell external momenta and distinct massive propagators -- for
one-loop scalar integrals, for {\it covariant} gauges, and apply it to one
through six-point loop integrals. We present detailed analysis of pentagon and
hexagon scalar integrals for massive/massless internal particles being external
momenta on or off mass shell.


title: Spacetime Structure of Massive Gravitinos

abstract:
  The talk presents an ab initio construct of the spacetime structure
underlying massive gravitinos. We argue that single spin interpretation of
massive gravitino is untenable, and that a spin measurement in the rest frame
for an unpolarized ensemble of massive gravitinos, would yield the results
3/2^- with probability one half, and 1/2 with probability one half. The latter
is distributed uniformly, i.e. as 1/4, among the two spin-1/2^+ and spin-1/2^-
states of opposite parities. From that we draw the conclusion that the massive
gravitino should be interpreted as a particle of multiple spin. We expect that
a extension of this work to finite-range gravity shall endow the graviton with
spins 0, 1, and 2 components.


title: Flavor-Singlet B-Decay Amplitudes in QCD Factorization

abstract:
  Exclusive hadronic B-meson decays into two-body final states consisting of a
light pseudoscalar or vector meson along with an eta or eta' meson are of great
phenomenological interest. Their theoretical analysis involves decay mechanisms
that are unique to flavor-singlet states, such as their coupling to gluons or
their ``intrinsic charm'' content. These issues are studied systematically in
the context of QCD factorization and the heavy-quark expansion. Theory can
account for the experimental data on the B->K^{(*)} eta^{(')} branching
fractions, albeit within large uncertainties.


title: Radiative Corrections to Higgs Masses in $Z^{\prime}$ Models

abstract:
  We calculate radiative corrections to the masses of the Higgs bosons in a
minimal supersymmetric model that contains an additional non-anomalous (U(1)')
gauge symmetry. With some fine-tuning of the (U(1)') charges of the Higgs
fields, it is possible to suppress the (Z)--(Z^{\prime}) mixing. We use this
fact, along with the lower bound on the lightest Higgs mass after LEPII era, as
a criterion to restrict the set of parameters in our analysis. We calculate the
mass of the lightest Higgs and its mixing with the other Higgs bosons, in a
large region of the parameter space.


title: A new hard QCD phenomenon - proton diffraction into three jets

abstract:
  We argue that the process of the proton diffraction into three jets in
proton-nucleus scattering at LHC will allow to investigate the light-cone wave
function of protons, generalized gluon densities in nuclei at small x, as well
as the interplay of the color transparency and opacity phenomena.


title: Novel QCD phenomena in pA collisions at LHC

abstract:
  We discuss novel QCD phenomena in pA collisions at LHC energies such as the
possibility to invesigate the behaviour of hard processes at $x $ as low as
$10^{-7}$, signals for onset of the black body limit in the hard processes and
in the nucleon fragmentation, multijet production.


title: Cosmological Implications of Neutrino Mass

abstract:
  I discuss the cosmological implications of neutrino mass including the
cosmological relic density and dark matter, the galaxy structure limits on
neutrino mass, nucleosynthesis, supernovae, cosmic rays and gamma ray bursts.


title:
The Meson Spectrum of the BCC Quark Model (A Modification of the Quark
  Model)

abstract:
  Using the quark spectrum of the BCC Quark Model [1] and the phenomenological
formula for the binding energies of the mesons, not only have we deduced the
intrinsic quantum numbers (I, S, C, b, and Q) of all mesons as was done with
the Quark Model [2], but also we deduced the meson mass spectrum in agreement
with experimental results [3] that we could not deduce using the Quark Model.
The experimental meson spectrum gives some evidence of the existence of the new
quarks $q_S^*(1391)$, $q_S^*(2551)$ and $q_C^*(6591)$..., which are predicted
by the BCC Quark Model. The meson $\chi (1600)$ $[2^+(2^{++})]$ with I = 2
(predicted by the BCC Quark Model--T(1603)) has already been discovered [4]. If
this is finally confirmed, it will provide a strong support for the BCC Quark
Model. We propose a search for the mesons D(5996), $D_S (6151)$, B(9504), $B_S
(9659)$, $B_C (11031)$, $\eta (5926)$, $\eta (17837)$, $\psi (25596)$,
$\Upsilon (17805)$, $\Upsilon (29597)$, T(960), T(1282), T(1603), and T(1924).


title: Factorization in leptonic radiative B -> gamma e\nu decays

abstract:
  We discuss factorization in exclusive radiative leptonic B->\gamma e\nu
decays using the soft-collinear effective theory. The form factors describing
these decays can be expanded in a power series in Lambda/E_\gamma with E_\gamma
the photon energy. We write down the most general operators in the effective
theory which contribute to the form factors at leading order in
Lambda_QCD/E_\gamma, proving their factorization into hard, jet and soft
contributions, to all orders in alpha_s.


title: Long distance regularization in chiral perturbation theory with decuplet

abstract:
  We investigate the use of long distance regularization in SU(3) baryon chiral
perturbation theory with decuplet fields. The one-loop decuplet contributions
to the octet baryon masses, axial couplings, S-wave nonleptonic hyperon decays
and magnetic moments are evaluated in a chirally consistent fashion by
employing a cutoff to implement long distance regularization. The convergence
of the chiral expansions of these quantities is improved compared to the
dimensionally regularized version which indicates that the propagation of
Goldstone bosons over distances smaller than a typical hadronic size, which is
beyond the regime of chiral perturbation theory but included by dimensional
regularization, is removed by use of a cutoff.


title: Parameter Space Investigations of Free Fermionic Heterotic Models

abstract:
  I survey the parameter space of NAHE-based free fermionic heterotic string
models. First, I discuss flat directions of the low energy effective field
theories and show that D-flat directions need not be isomorphic to gauge
invariant superpotential terms. Next, I review recent studies of three
generation SU(3)_C x SU(2)_L x U(1)_Y, SU(3)_C x SU(2)_L x SU(2)_R x U(1)_B-L,
SU(4)_C x SU(2)_L x U(1)_Y', and flipped SU(5) models, constructed by Wilson
breaking of the underlying SO(10) observable sector gauge group of the NAHE Z_2
x Z_2 basis. Based on talk presented at the First International Conference on
String Phenomenology.


title: Physics with forward protons at hadron colliders

abstract:
  We emphasize the importance of tagging the outgoing forward protons to
sharpen the predictions for New Physics at the LHC. We show that exclusive
double-diffractive Higgs production, pp-->p+H+p, followed by the H-->bb decay,
could play an important role in identifying a 'light' Higgs boson.


title:
Observational constraint on the fourth derivative of the inflaton
  potential

abstract:
  We consider the flow-equations for the 3 slow-roll parameters n_S (scalar
spectral index), r (tensor to scalar ratio), and dn_S/dlnk (running of the
spectral index). We show that the combination of these flow-equations with the
observational bounds from cosmic microwave background and large scale structure
allows one to put a lower bound on the fourth derivative of the inflationary
potential, M_P^4(V''''/V) > -0.02.


title: Tests for Cosmological Evolution of a Brane Universe Model

abstract:
  The relativistic Friedmann Lemaitre cosmology model (FLCM) is very sucessful
to describe the evolution history of the Universe from the " First three
Minutes". Any alternative model should be consistent with the FLCM explanations
to the later stage evolutions of the Universe at certain points. An noncompact
extra dimension model was recently proposed by Randall and Sundrum. Binetruy et
al. obtained the modified Friedmann equation, in which the energy density of
the brane appears quadratically in contrast with the linear behavior of the
standard Friedmann equation. We investigate kinds of classical cosmological
effects of the new models and get a general solution of the cosmic evolution
for this extended model, with more detail discussions of the brane tension
parameter on these cosmological tests.


title:
Subleading Isgur-Wise Function of $\Lambda_b\to\Lambda_{c1}$ using QCD
  sum rules

abstract:
  Subleading Isgur-Wise form factor $\tau(v\cdot v')$ at ${\cal O}(1/m_Q)$ for
$\Lambda_b\to\Lambda_{c1}^{1/2,3/2}$ weak transition is calculated by using the
QCD sum rules in the framework of the heavy quark effective theory (HQET),
where $\Lambda^{1/2}_{c1}$ and $\Lambda^{3/2}_{c1}$ are the orbitally excited
charmed baryon doublet with $J^P=(1^-/2,3^-/2)$. We consider the subleading
contributions from the weak current matching in the HQET. The interpolating
currents with transverse covariant derivative are adopted for
$\Lambda^{1/2}_{c1}$ and $\Lambda^{3/2}_{c1}$ in the analysis. The slope
parameter $\rho^2$ in linear approximation of $\tau$ is obtained to be
$\rho^2=2.76$ and the interception to be $\tau(1)=-1.27$ GeV.


title: O.P.E. and Power Corrections to the QCD coupling constant

abstract:
  Lattice data seems to show that power corrections should be convoked to
describe appropriately the transition of the QCD coupling constant running from
U.V. to I.R. domains. Those power corrections for the Landau-gauge MOM coupling
constant in a pure Yang-Mills theory (N_f=0) are analysed in terms of Operator
Product Expansion (O.P.E.) of two- and three-point Green functions, the gluon
condensate <A^2> emerging from this study. The semi-classical picture given by
instantons can be also used to look for into the nature of the power
corrections and gluon condensate.


title:
Quark-gluon evolution in early stage of ultra-relativistic heavy-ion
  collisions

abstract:
  A set of coupled kinetic equations describing in the Abelian approximation a
mixture of quarks and self-interacting gluons is formulated and solved
numerically. The model includes the Schwinger-like mechanism for particle
creation in a strong field as well as two-particle elastic collisions between
all mixture components in the Landau approximation of small-angle scattering.
The process of equilibration at the initial energy density exhibits a dominant
quark creation in the very early time of interaction. It is shown that damping
of energy density oscillations due to elastic scattering of perturbative quarks
and gluons is not strong enough to reach thermodynamic equilibrium in a
reasonable relaxation time. A possible account for a such behavior is
discussed.


title:
Role of quark-instanton liquid interactions in colour superconductivity
  phase

abstract:
  The interaction of light quarks and instanton liquid is analyzed at finite
density of quark/baryon matter and in the phase of nonzero values of diquark
(colour) condensate. It is shown that instanton liquid perturbation produced by
such an interaction results in an essential increase of the critical value of
quark chemical potential $\mu_c$ which provokes the perceptible increase of
quark matter density around the expected onset of the colour superconductivity
phase.


title: Hard diffraction and the nature of the Pomeron

abstract:
  We ask the question whether the quark and gluon distributions in the Pomeron
obtained from QCD fits to hard diffraction processes at HERA can be dynamically
generated from a state made of ``valence-like'' gluons and sea quarks as input.
By a method combining backward Q^2-evolution for data exploration and forward
Q^2-evolution for a best fit determination, we find that the diffractive
structure functions published by the H1 collaboration at HERA can be described
by a simple ``valence-like'' input at an initial scale of order mu^2 ~ 2.3-2.7
GeV^2. The parton number sum rules at the initial scale mu^2 for the H1 fit
gives 2.1\pm .1\pm .1 and .13\pm .01 \pm .02 for gluon and sea quarks
respectively, corresponding to an initial Pomeron state made of (almost) only
two gluons. It has flat gluon density leading to a plausible interpretation in
terms of a gluonium state.


title: Charming penguin and direct CP-violation in charmless B decays

abstract:
  In the study of two-body charmless B decays as a mean of looking for direct
CP-violation and measuring the CKM mixing parameters in the Standard Model, the
short-distance penguin contribution with its absorptive part generated by charm
quark loop seems capable of producing sufficient $B \to K\pi$ decays rates, as
obtained in factorization and QCD-improved factorization models. However there
are also long-distance charming penguin contributions which could give rise to
a strong phase due to the rescattering $D^{*}D^{*}_{s} \to K\pi$ etc. In this
talk, I would like to discuss recent works on the charming penguin contribution
as a different approach to the calculation of these contributions in two-body
charmless B decays. We find that the charming penguin contribution is
significant for $B\to K\pi$ decays and, together with the tree and penguin
terms, produces large branching ratios in agreement with data, though the
analysis is affected by large theoretical uncertainties. The absorptive part
due to the charmed meson intermediate states is found to produce large CP
asymmetries for $B \to K\pi, \pi\pi$ decays.


title:
Gluon condensate and c-quark mass in pseudoscalar sum rules at 3-loop
  order

abstract:
  Charmonium sum rules for pseudoscalar 0^{-+} state eta_c(1S) are analyzed
within perturbative QCD and Operator Product Expansion. The perturbative part
of the pseudoscalar correlator is considered at alpha_s^2 order and the
contribution of the gluon condensate <G^2> is taken into account with alpha_s
correction. The OPE series includes the operators of dimension D=6,8 computed
both in the instanton and factorization model. The method of moments in MS-bar
scheme allows to establish acceptable values of the charm quark mass and gluon
condensate, using the experimental mass of eta_c. In result of the analisys the
charm quark mass is found to be m_c(m_c)=1.26+-0.02 GeV independently of the
condensate value. The sensitivity of the results to various approximations for
the massive 3-loop pseudoscalar correlator is discussed.


title: Tomography of cold and hot QCD matter : tools and diagnosis

abstract:
  The probability distribution D(epsilon) in the energy loss incurred by
incoming and outgoing hard quarks in a QCD medium is computed numerically from
the BDMPS gluon spectrum. It is shown to follow an empirical log-normal
behavior which allows us to give the quenching weight a simple analytic
parameterization. The dependence of our results under the infrared and
ultraviolet sensitivity of the gluon spectrum is investigated as well. Finally,
as an illustration, we discuss and compare estimates for the quenching of
hadron spectra in nuclear matter and in a quark-gluon plasma to HERA and RHIC
preliminary data.


title:
Tomography of nuclear matter: Comparing Drell-Yan with deep inelastic
  scattering data

abstract:
  We set tight constraints on the energy loss of hard quarks in nuclear matter
from NA3 Drell-Yan measurements. Our estimate then allows for the description
of HERMES preliminary deep inelastic scattering data on hadron production.


title: Single color and single flavor color superconductivity

abstract:
  We survey the non-locked color-flavor-spin channels for quark-quark (color
superconducting) condensates in QCD, using an NJL model. We also study
isotropic quark-antiquark (mesonic) condensates. We make mean-field estimates
of the strength and sign of the self-interaction of each condensate, using
four-fermion interaction vertices based on known QCD interactions. For the
attractive quark pairing channels, we solve the mean-field gap equations to
obtain the size of the gap as a function of quark density. We also calculate
the dispersion relations for the quasiquarks, in order to see how fully gapped
the spectrum of fermionic excitations will be. We use our results to specify
the likely pairing patterns in neutral quark matter, and comment on possible
phenomenological consequences.


title:
Ultra high energy photon showers in magnetic field:angular distribution
  of produced particles

abstract:
  Ultra high energy (UHE) photons can initiate electromagnetic showers in
magnetic field. We analyze the two processes that determine the development of
the shower, $e^+ e^-$ pair creation and synchrotron radiation, and derive
formulae for the angular distribution of the produced particles. These formulae
are necessary to study the three-dimensional development of the shower.


title: Decoupling behaviour of O(m_t^4) corrections to the h^0 self-couplings

abstract:
  The decoupling behaviour of the leading one-loop Yukawa-coupling
contributions of O(m_t^4) to the lightest MSSM Higgs boson self-couplings, when
the top-squarks are heavy as compared to the electroweak scale, are discussed.
As shown analytically and numerically, the large corrections can almost
completely be absorbed into the h^0-boson mass and therefore, the h^0
self-couplings remain similar to the coupling of the SM Higgs boson for a heavy
top-squark sector.


title: QCD corrections to associated t anti-t h production at hadron colliders

abstract:
  We briefly present the status of QCD corrections to the inclusive total cross
section for the production of a Higgs boson in association with a top-quark
pair within the Standard Model at hadron colliders.


title: The invisible axion in a Randall-Sundrum universe

abstract:
  We study the problem of integrating an invisible axion into the
Randall-Sundrum scenario as an example of how to generate new energy scales
between the extremes of the Planck mass and the electroweak scale. In this
scenario, the axion corresponds to the phase of complex bulk scalar field. We
show how to generate an intermediate energy scale by including a third brane in
the scenario. We discuss the stabilization of this brane in detail to
demonstrate that no additional fine-tunings arise.


title: Standard and Non-Standard Physics in Neutrino Oscillations

abstract:
  We analyze the impact of recent solar and atmospheric data in the
determination of the neutrino oscillation parameters, taking into account that
both the solar nu_e and the atmospheric nu_mu may convert to a mixture of
active and sterile neutrinos. Furthermore, in the context of the atmospheric
neutrino problem we discuss an extended mechanism of neutrino propagation which
combines both oscillations and non-standard neutrino-matter interactions. We
use the most recent neutrino data, including the 1496-day Super-K solar and
atmospheric data samples, the latest SNO spectral and day/night solar data, and
the final MACRO atmospheric results. We confirm the clear preference of all the
data for pure-active oscillation solutions, bounding the fraction of sterile
neutrino involved in oscillations to be less than 52% in the solar sector and
less than 40% in the atmospheric sector, at 3 sigma. For the atmospheric case
we also derive a bound on the total amount of non-standard neutrino-matter
interactions, bounding the flavor-changing component to -0.03 <= epsilon <=
0.02 and the non-universal component to |epsilon'| <= 0.05.


title: Effects of mixing with quark singlets

abstract:
  The mixing of the known quarks with new heavy singlets can modify
significantly some observables with respect to the Standard Model predictions.
We analyse the range of deviations permitted by the constraints from precision
electroweak data and flavour-changing neutral processes at low energies. We
study top charged current and neutral current couplings, which will be directly
tested at top factories, like LHC and TESLA. We discuss some examples of
observables from K and B physics, as the branching ratio of K_L -> pi^0 nu nu,
the B^0_s mass difference or the time-dependent CP asymmetry in B_s^0 -> D_s^+
D_s^-, which can also show large new effects.


title: Neutrino Factories: Physics Potential

abstract:
  The physics potential of low-performance and high-performance neutrino
factories is briefly reviewed..


title: Beyond the Zero-Binding Approximation in Quarkonium

abstract:
  The hadronic decays of quarkonium and the B meson inclusive decay into J/Psi
+ X, if treated in the zero-binding approximation, suggest a value of the
strong coupling constant much smaller than the value implied in the standard
model by running from measurements at the Z. Thus, assuming the standard model
is correct in the low energy region, there must be very substantial
relativistic binding corrections to these processes. We discuss the wave
function factor appearing in covariant treatments of quarkonium production and
decay processes with special attention to the way in which the spin of the
quarks carries over into the spin of the bound state. We find that Lorentz
covariance requires that the bound state be a superposition of free quark and
antiquark spinors notably different from the usual ones. We resolve a
superficial apparent paradox suggesting that the relative momentum of the
quarks should lie in a plane perpendicular to the spin quantization axis and we
calculate the J/Psi binding corrections to lepton pair decay and to the
inclusive B decay.


title: Calculating the pion decay constant from \alpha_s(M_Z)

abstract:
  We revisit the analysis of the improved ladder Schwinger-Dyson (SD) equation
for the dynamical chiral symmetry breaking in QCD with emphasizing the
importance of the scale ambiguity. Previous calculation done so far naively
used one-loop MSbar coupling in the improved ladder SD equation without
examining the scale ambiguity. As a result, the calculated pion decay constant
f_\pi was less than a half of its experimental value f_\pi=92.4MeV once the QCD
scale is fixed from the high energy coupling \alpha_s(M_Z). In order to settle
the ambiguity in a proper manner, we adopt here in the present paper the
next-to-leading-order effective coupling instead of a naive use of the MSbar
coupling. The pion decay constant f_\pi is then calculated from high energy QCD
coupling strength \alpha_s(M_Z)=0.1172 \pm 0.0020. Within the
Higashijima-Miransky approximation, we obtain f_\pi=85--106MeV depending on the
value of \alpha_s(M_Z) which agrees well with the experimentally observed value
f_\pi=92.4MeV. The validity of the improved ladder SD equation is therefore
ascertained more firmly than considered before.


title: Quasi-optimal observables vs. event selection cuts

abstract:
  The method of quasi-optimal observables [hep-ph/0001019] offers a fundamental
yet simple and flexible algorithmic framework for data processing in high
energy physics to improve upon the practice of event selection cuts.


title: Wave function and CKM renormalization

abstract:
  In this presentation we clarify some aspects of the LSZ formalism and wave
function renormalization for unstable particles in the presence of electroweak
interactions when mixing and CP violation are considered. We also analyze the
renormalization of the CKM mixing matrix which is closely related to wave
function renormalization. The effects due to the electroweak radiative
corrections that are described in this work are small, but they will need to be
considered when the precision in the measurement of the charged current sector
couplings reaches the 1% level. The work presented here is done in
collaboration with Julian Manzano and Pere Talavera.


title: Fermionic decays of sfermions in the MSSM: a full one-loop calculation

abstract:
  We present a full one-loop calculation of the electroweak corrections to the
partial decay widths of the fermionic modes of sfermions \Gamma(\sfermion \to
f'\chi). The main technical points of the renormalization are presented, and
the main features of the results are discussed.


title: On Inclusive B Decays

abstract:
  I briefly review the description of inclusive heavy hadron decays based on
the inverse heavy quark mass expansion. In particular, I consider the
transition $B \to X_u \ell \nu$ and the problem of extracting $V_{ub}$, mainly
as far as the separation from the background represented by $b \to c$ modes is
concerned. I also discuss how to obtain complementary information from the
decay mode $B \to X_s \gamma$.


title: Full one-loop corrections to sfermion decays

abstract:
  We analyze the partial decay widths of sfermions decaying into charginos and
neutralinos \Gamma(\sfermion -> f'\chi) at the one-loop level. We present the
renormalization framework, and discuss the value of the corrections for top-
and bottom-squark decays.


title: Charge and Spin Asymmetries from Pomeron-Odderon Interference

abstract:
  We study Pomeron-Odderon interference effects giving rise to charge and
single-spin asymmetries in diffractive electroproduction of a $\pi^+ \pi^-$
pair. We calculate these asymmetries in the Born approximation of QCD in a
kinematical domain accessible to HERA experiments.


title: Analytic invariant charge: non-perturbative aspects

abstract:
  A brief review of the recently developed model for the QCD analytic invariant
charge is presented. The main idea of this approach is invoking the analyticity
condition into the framework of the renormalization group method. More
precisely, the analyticity requirement is explicitly imposed on the
perturbative expansion of the $\beta$ function for restoring its correct
analytic properties. The model possesses a number of profitable features.
Namely, the analytic invariant charge has no unphysical peculiarities at any
loop level; it contains no free parameters; it incorporates ultraviolet
asymptotic freedom with infrared enhancement; it has universal behavior both in
ultraviolet and infrared regions at any loop level; it possesses a good higher
loop and scheme stability. There is considerable difference between the
respective values of analytic invariant charge in the low-energy domain of
spacelike and timelike regions. The approach proposed enables one to describe
various strong interaction processes both of perturbative and intrinsically
non-perturbative nature.


title: Z-Burst Scenario for the Highest Energy Cosmic Rays

abstract:
  The origin of highest energy cosmic rays is yet unknown. An appealing
possibility is the so-called Z-burst scenario, in which a large fraction of
these cosmic rays are decay products of Z bosons produced in the scattering of
ultrahigh energy neutrinos on cosmological relic neutrinos. The comparison
between the observed and predicted spectra constrains the mass of the heaviest
neutrino. The required neutrino mass is fairly robust against variations of the
presently unknown quantities, such as the amount of relic neutrino clustering,
the universal photon radio background and the extragalactic magnetic field.
Considering different possibilities for the ordinary cosmic rays the required
neutrino masses are determined. In the most plausible case that the ordinary
cosmic rays are of extragalactic origin and the universal radio background is
strong enough to suppress high energy photons, the required neutrino mass is
0.08 eV < m_nu < 0.40 eV. The required ultrahigh energy neutrino flux should be
detected in the near future by experiments such as AMANDA, RICE or the Pierre
Auger Observatory.


title: Subprocess Size in Hard Exclusive Scattering

abstract:
  The interaction region of hard exclusive hadron scattering can have a large
transverse size due to endpoint contributions, where one parton carries most of
the hadron momentum. The endpoint region is enhanced and can dominate in
processes involving multiple scattering and quark helicity flip. The endpoint
Fock states have perturbatively short lifetimes and scatter softly in the
target. We give plausible arguments that endpoint contributions can explain the
apparent absence of color transparency in fixed angle exclusive scattering and
the dimensional scaling of transverse rho photoproduction at high momentum
transfer, which requires quark helicity flip. We also present a quantitative
estimate of Sudakov effects.


title: Lepton Flavour Violation

abstract:
  After a summary of the motivations for searching flavour violating decays and
electric dipole moments in the leptonic sector, I briefly sketch the present
status of the limits on lepton-slepton misalignement and discuss the
potentialities of the planned experimental improvements. Candidates for
theories beyond the Standard Model have to satisfy all these experimental
constraints; I will discuss in particular how the supersymmetric SM extended
with the see-saw faces the flavour problem.


title: Quark spin coupling in baryons - revisited

abstract:
  A direct connection can be made between mixing angles in negative parity
baryons and the spin coupling of constituent quarks. The mixing angles do not
depend on spectral data. These angles are recalculated for gluon exchange and
pion exchange between quarks. For pion exchange the results of Glozman and
Riska are corrected. The experimental data on mixing are very similar to those
derived from gluon exchange but substantially different from the values
obtained for pion exchange.


title: Dynamically enhanced $B\to K^*\pi$ decays in perturbative QCD

abstract:
  We investigate the $B \to K^{*}\pi$ decays, one of hardly understandable
processes among charmless B-meson decays, within the perturbative QCD method.
Owing to the dynamically enhanced mechanism in PQCD, we obtain large branching
ratios and large direct CP asymmetries, for instance, $Br(B^0 \to
K^{*\pm}\pi^{\mp})=(9.1^{+4.9+0.3}_{-3.9-0.2})\times 10^{-6}$, $Br(B^{\pm} \to
K^{*0}\pi^{\pm})=(10.0^{+5.3}_{-3.5}\pm 0.0)\times 10^{-6}$; $Acp(B^0 \to
K^{*\pm}\pi^{\mp})=(-19.2^{+0.5}_{-1.7})%$, and $Acp(B^{\pm} \to
K^{*\pm}\pi^{0})=(-43.7^{+4.0}_{-4.2})%$. The branching ratios are consistent
with experimental data and large direct CP violation effects will be tested by
near future experimental measurements in Asymmetric B-factory.


title: A Lecture on Neutrino Masses, Mixing and Oscillations

abstract:
  Neutrino mixing and basics of neutrino oscillations are considered. Recent
evidences in favour of neutrino oscillations, obtained in the solar and
atmospheric neutrino experiments, are discussed. Neutrino oscillations in the
solar and atmospheric ranges of $\Delta m^{2}$ are considered in the framework
of the minimal scheme with the mixing of three massive neutrinos.


title: How Should We Modify the High Energy Interaction Models ?

abstract:
  An analysis has been made of the present situation with respect to the high
energy hadron-nucleus and nucleus-nucleus interaction models as applied to
cosmic rays. As is already known, there are inconsistencies in the
interpretation of experimental data on the primary mass composition, which
appear when different EAS components are used for the analyses, even for the
same experiment. In the absence of obvious experimental defects, there is a
clear need for an improvement to the existing models; we argue that the most
promising way is to enlist two effects which should be present in nucleus-
nucleus collisions but have not been allowed for before. These are: a few
percent energy transfer into the EAS electromagnetic component due to electron-
positron pair production or electromagnetic radiation of the quark-gluon plasma
and a small slow-down of the cascading process in its initial stages associated
with the extended lifetime of excited nuclear fragments. The latter process
displaces the shower maximum deeper into the atmosphere.


title: Multi-loop Amplitudes and Resummation

abstract:
  We explore the relation between resummation and explicit multi-loop
calculations for QCD hard-scattering amplitudes. We describe how the
factorization properties of amplitudes lead to the exponentiation of double and
single poles at each order of perturbation theory. For these amplitudes,
previously-observed relations between single and double poles in different 2 to
2 processes can now be interpreted in terms of universal functions associated
with external partons and process-dependent anomalous dimensions that describe
coherent soft radiation. Catani's proposal for multiple poles in
dimensionally-continued amplitudes emerges naturally.


title: A new mechanism for a naturally small Dirac neutrino mass

abstract:
  A mechanism is proposed in which a right-handed neutrino zero mode and a
right-handed charged lepton zero mode can be localized at the same place along
an extra compact dimension while having markedly different spreads in their
wave functions: a relatively narrow one for the neutrino and a rather broad one
for the charged lepton. In their overlaps with the wave function for the
left-handed zero modes, this mechanism could produce a natural large hierarchy
in the effective Yukawa couplings in four dimensions, and hence a large
disparity in masses.


title:
Modeling power corrections to the Bjorken sum rule for the neutrino
  structure function F_1

abstract:
  Direct measurements of the the structure functions F_1^{nu p} and F_1^{nu n}
at a neutrino factory would allow for an accurate extraction of alpha_s from
the Q^2-dependence of the Bjorken sum rule, complementing that based on the
Gross-Llewellyn-Smith sum rule for F_3. We estimate the power (1/Q^2-)
corrections to the Bjorken sum rule in the instanton vacuum model. For the
reduced matrix element of the flavor-nonsinglet twist-4 operator
ubar_g_Gdual_gamma_gamma5_u - (u -> d) we obtain a value of 0.18 GeV^2, in good
agreement with the QCD sum rule calculations of Braun and Kolesnichenko. Our
result allows to reduce the theoretical error in the determination of alpha_s.


title: Standard Model Higgs from Higher Dimensional Gauge Fields

abstract:
  We consider the possibility that the standard model Higgs fields may
originate from extra components of higher dimensional gauge fields. Theories of
this type considered before have had problems accommodating the standard model
fermion content and Yukawa couplings different from the gauge coupling.
Considering orbifolds based on abelian discrete groups we are lead to a 6
dimensional G_2 gauge theory compactified on T^2/Z_4. This theory can naturally
produce the SM Higgs fields with the right quantum numbers while predicting the
value of the weak mixing angle sin^2 theta_W = 0.25 at the tree-level, close to
the experimentally observed one. The quartic scalar coupling for the Higgs is
generated by the higher dimensional gauge interaction and predicts the
existence of a light Higgs. We point out that one can write a quadratically
divergent counter term for Higgs mass localized to the orbifold fixed point.
However, we calculate these operators and show that higher dimensional gauge
interactions do not generate them at least at one loop. Fermions are introduced
at orbifold fixed points, making it easy to accommodate the standard model
fermion content. Yukawa interactions are generated by Wilson lines. They may be
generated by the exchange of massive bulk fermions, and the fermion mass
hierarchy can be obtained. Around a TeV, the first KK modes would appear as
well as additional fermion modes localized at the fixed point needed to cancel
the quadratic divergences from the Yukawa interactions. The cutoff scale of the
theory could be a few times 10 TeV.


title: Radiative brane-mass terms in D>5 orbifold gauge theories

abstract:
  A gauge theory with gauge group G defined in D>4 space-time dimensions can be
broken to a subgroup H on four dimensional fixed point branes, when
compactified on an orbifold. Mass terms for extra dimensional components of
gauge fields A_i (brane scalars) might acquire (when allowed by the brane
symmetries) quadratically divergent radiative masses and thus jeopardize the
stability of the four-dimensional theory. We have analyzed Z_2
compactifications and identified the brane symmetries remnants of the higher
dimensional gauge invariance. No mass term is allowed for D=5 while for D>5 a
tadpole \epsilon^{ij}F_{ij}^\alpha can appear when there are U_\alpha(1)
factors in H. A detailed calculation is done for the D=6 case and it is
established that the tadpole is related, although does not coincide, with the
U_\alpha(1) anomaly induced on the brane by the bulk fermions. In particular,
no tadpole is generated from gauge bosons or fermions in real representations


title:
Differential Cross Section for Higgs Boson Production Including
  All-Orders Soft Gluon Resummation

abstract:
  The transverse momentum $Q_T$ distribution is computed for inclusive Higgs
boson production at the energy of the CERN Large Hadron Collider. We focus on
the dominant gluon-gluon subprocess in perturbative quantum chromodynamics and
incorporate contributions from the quark-gluon and quark-antiquark channels.
Using an impact-parameter $b$-space formalism, we include all-orders
resummation of large logarithms associated with emission of soft gluons. Our
resummed results merge smoothly at large $Q_T$ with the fixed-order
expectations in perturbative quantum chromodynamics, as they should, with no
need for a matching procedure. They show a high degree of stability with
respect to variation of parameters associated with the non-perturbative input
at low $Q_T$. We provide distributions $d\sigma/dy dQ_T$ for Higgs boson masses
from $M_Z$ to 200 GeV. The average transverse momentum at zero rapidity $y$
grows approximately linearly with mass of the Higgs boson over the range $M_Z <
m_h <200$ GeV, $<Q_T> \simeq 0.18 m_h + 18 $~GeV. We provide analogous results
for $Z$ boson production, for which we compute $<Q_T> \simeq 25$ GeV. The
harder transverse momentum distribution for the Higgs boson arises because
there is more soft gluon radiation in Higgs boson production than in $Z$
production.


title: Parameterizations of Invariant Meson Production Cross Section

abstract:
  The Lund string fragmentation model is applied in a non-perturbative
calculation of the invariant production cross section of pions from
proton-proton collisions in the soft pT region. Invariant production cross
sections of pions and kaons from proton-proton collisions in the hard pT region
are calculated from the Feynman-Field perturbative QCD parton model.
Parameterizations of these production invariant cross sections are described.


title:
Bounds on the tau and muon neutrino vector and axial vector charge
  radius

abstract:
  A Majorana neutrino is characterized by just one flavor diagonal
electromagnetic form factor: the anapole moment, that in the static limit
corresponds to the axial vector charge radius <r^2_A>. Experimental information
on this quantity is scarce, especially in the case of the tau neutrino. We
present a comprehensive analysis of the available data on the single photon
production process $e^+ e^- -> \nu \bar\nu \gamma$ off Z-resonance, and we
discuss the constraints that these measurements can set on <r^2_A> for the tau
neutrino. We also derive limits for the Dirac case, when the presence of a
vector charge radius <r^2_V> is allowed. Finally, we comment on additional
experimental data on $\nu_\mu$ scattering from the NuTeV, E734, CCFR and
CHARM-II collaborations, and estimate the limits implied for <r^2_A> and
<r^2_V> for the muon neutrino.


title:
Flavor changing neutrino interactions and CP violation in neutrino
  oscillations

abstract:
  We investigate the interference effects of non-standard neutrino-matter
interactions (NSNI) with the mass-induced neutrino oscillations. The NSNI is
composed of flavor-changing neutrino interactions (FCNI) and flavor-diagonal
neutrino interactions (FDNI). Both of the interactions are introduced in the
\nu_\mu -\nu_\tau sector and the \nu_e -\nu_\mu sector in order to study their
effects in \nu_\mu\to\nu_\tau and \nu_\mu\to\nu_e oscillations, respectively.
The FCNI effect proves to possibly dominate the CP violating effect and
significantly survive as a fake CP violating effct in the neutrino energy
region where the pure CP violating effect, ordinary matter effect and FDNI
effect fall, for example, above 4 GeV at the baseline of L=730 km in the
\nu_\mu\to\nu_\tau oscillation for the maximum parameter values of FCNI and
FDNI allowed by the atmospheric neutrino oscillation data. The FCNI and FDNI
effects on CP violation in the $\nu_\mu\to\nu_e$ oscillation are negligibly
small due to the stringent constraints on FCNI from the bounds on lepton flavor
violating processes and on FDNI from the limits on lepton universality
violation.


title:
Geometric scaling in inclusive e A reactions and nonlinear perturbative
  QCD

abstract:
  In this note we report on geometric scaling in inclusive e A scattering data
from the NMC and E665 experiments. We show that this scaling, as well as
nuclear shadowing, is expected in the framework of nonlinear pQCD at small x
based on a simple rescaling argument for e p scattering.


title: CP, T and CPT violation in future long baseline experiments

abstract:
  I give a short overview about the possibilities and problems related to the
measurement of CP violation in long baseline experiments. Special attention is
paid to the issue of degeneracies and a method for their resolution is
quantitatively discussed. The CP violation reach for different experiments is
compared in dependence of $\sin^22\theta_{13}$ and $\dm{21}$. Furthermore a
short comment about the possible effects of matter induced T violation is made.
Finally the limits on CPT violation obtainable at a neutrino factory are shown.


title: Proton spin structure and valence quarks

abstract:
  The spin structure of the system of quasifree fermions having total angular
momentum $J=1/2$ is studied in a consistently covariant approach. Within this
model the relations between the spin functions are obtained. Their particular
cases are the sum rules Wanzura - Wilczek, Efremov - Leader - Teryaev,
Burkhardt - Cottingham and also the expression for the Wanzura - Wilczek twist
2 term $g_{2}^{WW}$. With the use of the proton valence quark distributions as
an input, the corresponding spin functions are obtained. The resulting
structure functions $g_{1}$ and $g_{2}$ are well compatible with the
experimental data.


title: Astroparticle Physics and Colliders

abstract:
  In this talk I discuss the interplay between collider physics and four topics
of astro-particle physics: neutrino oscillations, electroweak baryogenesis, LSP
Dark Matter, and ultra-high energy cosmic rays (UHECR). Some astrophysical
scenarios can (only) be tested decisively at colliders. In other cases input
from collider experiments is required to sharpen predictions for future
astro--particle physics experiments, e.g. for the LSP detection rate or the
UHECR spectrum in top--down models.