title: Calculating two- and three-body decays with FeynArts and FormCalc

abstract:
  The Feynman diagram generator FeynArts and the computer algebra program
FormCalc allow for an automatic computation of 2->2 and 2->3 scattering
processes in High Energy Physics. We have extended this package by four new
kinematical routines and adapted one existing routine in order to accomodate
also two- and three-body decays of massive particles. This makes it possible to
compute automatically two- and three-body particle decay widths and decay
energy distributions as well as resonant particle production within the
Standard Model and the Minimal Supersymmetric Standard Model at the tree- and
loop-level. The use of the program is illustrated with three standard examples:
h->b\bar{b}, \mu->e\bar{\nu}_e\nu_\mu, and Z->\nu_e\bar{\nu}_e.


title: Quintessence and the Underlying Particle Physics Theory

abstract:
  At present we know nothing about the nature of the dark energy accounting for
about 70% of the energy density of the Universe. One possibility is that the
dark energy is provided by an extremely light field, the quintessence, rolling
down its potential. Even though the underlying particle theory responsible for
the present quintessential behaviour of our Universe is unknown, such a theory
is likely to have contact with supersymmetry, supergravity or (super)string
theory. In these theories, there are plenty of scalar fields (moduli) which are
gravitationally coupled to all the other degrees of freedom and have vacuum
expectation values of the order of the Planck scale. We point out that, in
theories which allow a consistent embedding of quintessence, the generic
gravitational interaction of the moduli fields with the quintessence field
gives rise to a contribution to the energy density from the moduli fields of
the order of the critical energy density of the universe today. Furthermore,
the interaction contribution can generically enhance the negativity of the
equation of state.


title: How two neutrino superbeam experiments do better than one

abstract:
  We examine the use of two superbeam neutrino oscillation experiments with
baselines $\lsim 1000$ km to resolve parameter degeneracies inherent in the
three-neutrino analysis of such experiments. We find that with appropriate
choices of neutrino energies and baselines two experiments with different
baselines can provide a much better determination of the neutrino mass ordering
than a single experiment alone. Two baselines are especially beneficial when
the mass scale for solar neutrino oscillations $\delta m^2_{\rm sol}$ is $\gsim
5\times10^{-5}$ eV$^2$. We also examine CP violation sensitivity and the
resolution of other parameter degeneracies. We find that the combined data of
superbeam experiments with baselines of 295 and 900 km can provide sensitivity
to both the neutrino mass ordering and CP violation for $\sin^22\theta_{13}$
down to 0.03 for $|\delta m^2_{\rm atm}| \simeq 3\times10^{-3}$ eV$^2$. It
would be highly advantageous to have a 10% determination of $|\delta m^2_{\rm
atm}|$ before the beam energies and baselines are finalized, although if
$|\delta m^2_{\rm atm}|$ is not that well known, the neutrino energies and
baselines can be chosen to give fairly good sensitivity for a range of $|\delta
m^2_{\rm atm}|$.


title:
The interplay between Sudakov resummation, renormalons and higher twist
  in deep inelastic scattering

abstract:
  We claim that factorization implies that the evolution kernel, defined by the
logarithmic derivative of the N-th moment of the structure function d ln F_2^N
/ d ln Q^2, receives logarithmically enhanced contributions (Sudakov logs) from
a single source, namely the constrained invariant mass of the jet. Available
results from fixed-order calculations facilitate Sudakov resummation up to the
next-to-next-to-leading logarithmic accuracy. We use additional all-order
information on the physical kernel from the large-beta_0 limit to model the
behaviour of further subleading logs and explore the uncertainty in extracting
alpha_s and in determining the magnitude of higher-twist contributions from a
comparison with data on high moments.


title:
Three-Quark Light-Cone Amplitudes of The Proton And Quark-Orbital-Motion
  Dependent Observables

abstract:
  We study the three-quark light-cone amplitudes of the proton including
quarks' transverse momenta. We classify these amplitudes using a
newly-developed method in which light-cone wave functions are constructed from
a class of light-cone matrix elements. We derive the constraints on the
amplitudes from parity and time-reversal symmetries. We use the amplitudes to
calculate the physical observables which vanish when the quark orbital angular
momentum is absent. These include transverse-momentum dependent parton
distributions $\Delta q_T(x, k_\perp)$, $q_T(x, k_\perp)$, $\delta q(x,
k_\perp)$, and $\delta q_L(x,k_\perp)$, twist-three parton distributions
$g_T(x)$ and $h_L(x)$, helicity-flip generalized parton distributions $E(x,
\xi=0, Q^2)$ and its associates, and the Pauli form factor $F_2(Q^2)$.


title: Effects of light scalar mesons in $\eta \to 3\pi$ decay

abstract:
  We study the role of a possible nonet of light scalar mesons in the still
interesting $\eta \to 3\pi$ decay process, with the primary motivation of
learning more about the scalars themselves. The framework is a conventional
non-linear chiral Lagrangian of pseudoscalars and vectors, extended to include
the scalars. The parameters involving the scalars were previously obtained to
fit the s-wave $\pi\pi$ and $\pi$K scatterings in the region up to about 1 GeV
as well as the strong decay $\eta' \to \eta \pi\pi$. At first, one might expect
a large enhancement from diagrams including a light $\sigma(560)$. However
there is an amusing cancellation mechanism which prevents this from occurring.
In the simplest model there is an enhancement of about 13 per cent in the \e3p
decay rate due to the scalars. In a more complicated model which includes
derivative type symmetry breakers, the cancellation is modified and the scalars
contribute about 30 percent of the total decay rate (although the total is not
significantly changed). The vectors do not contribute much. Our model produces
a reasonable estimate for the related $a_0(980)-f_0(980)$ mixing strength,
which has been a topic of current debate. Promising directions for future work
along the present line are suggested.


title: Heavy particle production during reheating

abstract:
  We discuss production of heavy partciles during reheating. We find that the
very energetic inflaton decay products can contribute to the production of
massive stable particles, either through collisions with the thermal plasma, or
through collisions with each other. If such reactions exist, the same massive
particles can also be produced directly in inflaton decay, once higher--order
processes are included. We show that these new, non--thermal production
mechanisms often significantly strengthen constraints on the parameters of
models containing massive stable particles.


title: Measuring $\gamma$ in $B^\pm \to K^\pm (K K^*)_D$ decays

abstract:
  We develop a method to measure the CKM angle $\gamma$ without hadronic
uncertainties from the analysis of $B^\pm \to K^\pm D^0$ and $K^\pm \D0bar$
followed by singly Cabibbo-suppressed $D$ decays to non CP-eigenstates, such as
$K^\pm K^{*\mp}$. This method utilizes the interference between $b\to c\bar u
s$ and $b\to u\bar c s$ decays, and we point out several attractive features of
it. All the modes that need to be measured for this method are accessible in
the present data.


title: Hyperon Polarization from Unpolarized pp and ep Collisions

abstract:
  Cross section formulas for the $\Lambda$ polarization in
$pp\to\Lambda^\uparrow(\ell_T)X$ and $ep\to\Lambda^\uparrow(\ell_T)X$ are
derived and its characteristic features are discussed.


title:
SU(3) and Nonet Breaking Effects in $K_L \to \gamma \gamma$ Induced by
  $s \to d + 2{gluon}$ due to Anomaly

abstract:
  In this paper we study the effects of $s\to d + 2{gluon}$ on $K_L \to
\gamma\gamma$ in the Standard Model. We find that this interaction can induce
new sizeable SU(3) and U(3) nonet breaking effects in $K_L - \eta, \eta'$
transitions and therefore in $K_L\to \gamma\gamma$ due to large matrix elements
of $<\eta(\eta')|\alpha_s G^a_{\mu\nu} \tilde G_a^{\mu\nu}|0>$ from QCD
anomaly. These new effects play an important role in explaining the observed
value. We also study the effects of this interaction on the contribution to
$\Delta m_{K_L-K_S}$.


title:
Low Energy 6-Dimensional N=2 Supersymmertric SU(6) Models on $T^2$
  Orbifolds

abstract:
  We propose low energy 6-dimensional N=2 supersymmetric SU(6) models on
$M^4\times T^2/(Z_2)^3$ and $M^4\times T^2/(Z_2)^4$, where the orbifold
$SU(3)_C\times SU(3)$ model can be embedded on the boundary 4-brane. For the
zero modes, the 6-dimensional N=2 supersymmetry and the SU(6) gauge symmetry
are broken down to the 4-dimensional N=1 supersymmetry and the $SU(3)_C\times
SU(2)_L\times U(1)_Y\times U(1)'$ gauge symmetry by orbifold projections. In
order to cancel the anomalies involving at least one $U(1)'$, we add extra
exotic particles. We also study the anomaly free conditions and present some
anomaly free models. The gauge coupling unification can be achieved at $100\sim
200$ TeV if the compactification scale for the fifth dimension is $3\sim 4$
TeV. The proton decay problem can be avoided by putting the quarks and
leptons/neutrinos on different 3-branes. And we discuss how to break the
$SU(3)_C\times SU(2)_L\times U(1)_Y\times U(1)'$ gauge symmetry, solve the
$\mu$ problem, and generate the $Z-Z'$ mass hierarchy naturally by using the
geometry. The masses of exotic particles can be at the order of 1 TeV after the
gauge symmetry breaking. We also forbid the dimension-5 operators for the
neutrino masses by $U(1)'$ gauge symmetry, and the realistic left-handed
neutrino masses can be obtained via non-renormalizable terms.


title: p p Elastic Scattering at LHC and Nucleon Structure

abstract:
  High energy elastic $p p$ scattering at the Large Hadron Collider (LHC) at
c.m. energy 14 TeV is predicted using the asymptotic behavior of
$\sigma_{tot}(s)$ and $\rho(s)$ known from dispersion relation calculations and
the measured elastic $\bar p p$ differential cross section at $\sqrt{s} = 546
{\rm GeV}$. The effective field theory model underlying the phenomenological
analysis describes the nucleon as having an outer cloud of quark-antiquark
condensed ground state, an inner core of topological baryonic charge of radius
$\simeq 0.44F$ and a still smaller valence quark-bag of radius $\lesssim 0.1
{\rm F}$. The LHC experiment TOTEM (Total and Elastic Measurement), if carried
out with sufficient precision from $|t| = 0$ to $|t| > 10 {\rm GeV^2}$, will be
able to test this structure of the nucleon.


title: A Strong Electroweak Sector at Future Colliders

abstract:
  A brief overview of the production at future colliders of two new triplets of
spin one resonances from a strong electroweak breaking is presented.


title: Gell-Mann - Low Function for QCD in the strong-coupling limit

abstract:
  The Gell-Mann - Low function \beta(g) in QCD (g=g0^2/16\pi^2 where g0 is the
coupling constant in the Lagrangian) is shown to behave in the strong-coupling
region as \beta_\infty g^\alpha with \alpha\approx -13, \beta_\infty\sim 10^5.


title: Delocalized Operator Expansion

abstract:
  A generalization of Wilson's local OPE for the short-distance expansion of
Euclidean current correlators, called delocalized operator expansion (DOE),
which has been proposed recently, is discussed. The DOE has better convergence
properties than the OPE and can account for non-local non-perturbative QCD
effects.


title: Updated Constraints on the Minimal Supergravity Model

abstract:
  Recently, refinements have been made on both the theoretical and experimental
determinations of the i.) mass of the lightest Higgs scalar, ii.) relic density
of cold dark matter in the universe, iii.) branching fraction for radiative B
decay BF(b \to s \gamma), iv.) muon anomalous magnetic moment, and v.) flavor
violating decay B_s \to \mu^+\mu^-. In this work, we present constraints from
each of these quantities on the minimal supergravity model as embedded in the
updated version of the computer program ISAJET v7.64. Improvements and updates
since our published work are especially emphasized. The combination of
constraints points to certain favored regions of model parameter space where
collider and non-accelerator SUSY searches may be more focused.


title:
Next-to-leading order QCD corrections to one hadron-production in
  polarized pp collisions at RHIC

abstract:
  We calculate the next-to-leading order QCD corrections to the spin-dependent
cross section for single-inclusive hadron production in hadronic collisions.
This process will be soon studied experimentally at RHIC, providing a tool to
unveil the polarized gluon distribution $\Delta g$. We observe a considerably
improvement in the perturbative stability for both unpolarized and polarized
cross sections. The NLO corrections are found to be non-trivial, resulting in a
reduction of the asymmetry.


title:
CP violation in supersymmetry with universal strength of Yukawa
  couplings

abstract:
  We analyse the CP problem in the context of a supersymmetric extension of the
standard model with universal strength of Yukawa couplings. In these models we
find a small amount of CP violation from the usual CKM mechanism and therefore
a significant contribution from supersymmetry is required. The electric dipole
moments impose severe constraints on the parameter space, forcing the trilinear
couplings to be factorizable in matrix form. We find that the LL mass
insertions give the dominant gluino contribution to saturate epsilon_K, while
chargino contributions to epsilon'/epsilon are compatible with the experimental
results. Due to significant supersymmetric contributions to B_d-\bar{B}_d
mixing, the recent large value of a_{J/\psi K_S} can be accommodated.


title: Chargino Pair Production at One-loop

abstract:
  We use the quantum corrected chargino production cross section, including
information on the beam polarization and chargino helicities, to estimate the
precision achievable at a 1 TeV, 500 ${\mathrm fb}^{-1}$ Linear Collider on the
determination of fundamental supersymmetric parameters from measurements of
light chargino mass and production cross sections. We show that to get
meaningful results higher order corrections should be included.


title: Leptonic Probes of the Standard Model

abstract:
  Precise measurements of the lepton properties provide stringent tests of the
Standard Model structure and accurate determinations of its parameters. We
overview the present status of a few selected topics: lepton universality, QCD
tests and the determination of alpha_s and m_s from hadronic tau decays, the
anomalous lepton magnetic moments and neutrino oscillations.


title: A Preon Model Based Universe

abstract: The model is not satisfactory.


title:
Melting the Diquark Condensate in Two-Color QCD: A Renormalization Group
  Analysis

abstract:
  We use a Landau theory and the epsilon expansion to study the superfluid
phase transition of two-color QCD at nonzero temperature, T, and baryonic
chemical potential, mu. At low T, and for N_f flavors of massless quarks, the
global SU(N_f) \times SU(N_f) \times U(1) symmetry is spontaneously broken by a
diquark condensate down to Sp(N_f) \times Sp(N_f) for any mu > 0. As the
temperature increases, the diquark condensate melts, and at sufficiently large
T the symmetry is restored. Using renormalization group arguments, we find that
in the presence of the chiral anomaly term there can be a second order phase
transition when N_f=2 or N_f >= 6, while the transition is first order for
N_f=4. We discuss the relevance of these results for the emergence of a
tricritical point recently observed in lattice simulations.


title: Single Heavy MSSM Higgs Production at e+e- Linear Collider

abstract:
  We briefly review the single heavy Higgs production at high energy e+e-
linear collider, \gamma\gamma collider and e-\gamma collider. We present the
recent results for e+e- --> W^{\pm}H^{\mp} in the Minimal Supersymmetric
Standard Model and preliminary results for e+e- --> \nu \bar\nu A^0.


title: Minimal Scenarios for Leptogenesis and CP Violation

abstract:
  The relation between leptogenesis and CP violation at low energies is
analyzed in detail in the framework of the minimal seesaw mechanism. Working,
without loss of generality, in a weak basis where both the charged lepton and
the right-handed Majorana mass matrices are diagonal and real, we consider a
convenient generic parametrization of the Dirac neutrino Yukawa coupling matrix
and identify the necessary condition which has to be satisfied in order to
establish a direct link between leptogenesis and CP violation at low energies.
In the context of the LMA solution of the solar neutrino problem, we present
minimal scenarios which allow for the full determination of the cosmological
baryon asymmetry and the strength of CP violation in neutrino oscillations.
Some specific realizations of these minimal scenarios are considered. The
question of the relative sign between the baryon asymmetry and CP violation at
low energies is also discussed.


title: Astrophysical Data and Conformal Unified Theory

abstract:
  Astrophysical data reformulated in the units of the relative Paris meter and
running Planck mass are used for restoration of a conformal version of the
unified theory where the absolute Planck mass belongs to ordinary initial data
(like the absolute Ptolemaeus position of the earth belongs to the initial data
of Newton's mechanics). In the conformal unified theory, both the latest data
on the Supernova luminosity-distance -- redshift relation and primordial
nucleosynthesis are described by a free primordial motion of the scalar
homogeneous field (Scalar Quintessence). This primordial cosmic evolution leads
to intensive cosmological creation of vector bosons forming the baryon
asymmetry of the universe (during their lifetime) and the CMB radiation as a
final product of their decays. There are values of the initial data that give
the CMB temperature (as an integral of the primordial motion) and the energy
density budget in agreement with observational data.


title:
Direct CP Violation in $B \to \pi^{+} \pi^{-} \pi$: Determination of
  $\alpha$ without discrete ambiguity

abstract:
  Direct CP violation in the hadronic decays $\Bar{B}^{0} \to \pi^{+}\pi^{-}
\pi^{0}$ is investigated near the peak of the $\rho^{0}$ taking into account
the effect of $\rho - \omega$ mixing. Branching ratios for processes $B^{\pm,0}
\to \rho^{\pm,0}\pi^{\pm,0}$ and $B^{-} \to \omega \pi^{-}$ are calculated as
well. We find that the CP violating asymmetry is strongly dependent on the CKM
matrix elements. For a fixed $N_{c}^{eff}$, the CP violating asymmetry, $a$,
has a maximum of order -40% to -70% for $\Bar{B}^{0} \to \rho^{0}(\omega)
\pi^{0}$ when the invariant mass of the $\pi^{+}\pi^{-}$ pair is in the
vicinity of the $\omega$ resonance.
  The sensitivity of the asymmetry to $N_{c}^{eff}$ is small in that case.
Moreover, we find that in the range of $N_{c}^{eff}$ which is allowed by the
most recent experimental branching ratios from the BABAR, BELLE and CLEO
Collaborations, the sign of $\sin \delta$ is always positive. Thus, a
measurement of direct CP violation in decays $\Bar{B}^{0} \to \pi^{+}\pi^{-}
\pi^{0}$ would remove the mod$(\pi)$ ambiguity in the determination of the CP
violating phase angle $\alpha$.


title: Determining Spin-Flavor Dependent Distributions

abstract:
  Many of the present and planned polarization experiments are focusing on
determination of the polarized glue. There is a comparable set of spin
experiments which can help to extract information on the separate
flavor-dependent polarized distributions. This talk will discuss possible sets
of experiments, some of which are planned at BNL, CERN, DESY and JHF, which can
be used to determine these distributions. Comments will include the estimated
degree to which these distributions can be accurately found.


title: The Origin of CP Violation

abstract:
  Quantum field theory has been established on symmetries, but their
fundamentality could be limited as practical calculations of physical
observations are not based on interacting Lagrangian. The requirement of
Lorentz invariance on vacuum expectation values is contradicted by parity
violation with massive fermions and Lorentz violation of the approximation in
the standard model is proved. After alternative interpretation of quark mixing
and problems of CP violation are addressed, the composite properties of neural
meson will be suggested as origin of CP violation with possible experimental
tests. In conclusion, fundamental symmetry violation is still inconclusive due
to the limited theoretical assumptions and physical observations.


title:
Dynamical Symmetry Breaking and Effective Lagrangians in U(n)
  Four-Fermion Models (n=2,3)

abstract:
  The formation of scalar condensates and dynamical symmetry breaking in the
U(n) four-fermion models (for n=2,3) with two coupling constants has been
studied by the functional integration method. The bosonization procedures of
the models under consideration are performed in one loop approximation. The
propagators of fermions, collective Bose-fields (bound states of fermions), as
well as the mass formulas for the fermions and bosons, are found. It is shown
that a self-consistent consideration of four-fermion models, in the framework
of dimension regularization, provides the mass relations for fermions for the
case $n\geq 3$. The effective Lagrangian of interacting scalar bosons is also
derived for the case n=2.


title:
Next-to-leading order QCD corrections to high-p_T pion production in
  longitudinally polarized pp collisions

abstract:
  We present a calculation for single-inclusive large-p_T pion production in
longitudinally polarized pp collisions in next-to-leading order QCD. We choose
an approach where fully analytical expressions for the underlying partonic
hard-scattering cross sections are obtained. We simultaneously rederive the
corresponding corrections to unpolarized scattering and confirm the results
existing in the literature. Our results allow to calculate the double-spin
asymmetry A_LL^pi for this process at next-to-leading order, which will soon be
used at BNL-RHIC to measure the polarization of gluons in the nucleon.


title: Hadron Production in Hadron-Hadron and Lepton-Hadron Collisions

abstract:
  We review a recent global analysis of inclusive single-charged-hadron
production in high-energy colliding-beam experiments, which is performed at
next-to-leading order (NLO) in the parton model of quantum chromodynamics
endowed with nonperturbative fragmentation functions (FFs). Comparisons of p
p-bar data from CERN S p p-bar S and the Fermilab Tevatron and gamma p data
from DESY HERA with the corresponding NLO predictions allow for quantitative
tests of the scaling violations in the FFs and their universality. We emphasize
the potential of new measurements at the Tevatron to place tight constraints in
the large-x region and on the gluon FF, complementary to those from e^+ e^-
data, which are indispensible in order to reliably predict the pi^0 background
for the H -> gamma gamma signal of the intermediate-mass Higgs boson at the
Tevatron and the CERN LHC. Adopting a similar theoretical framework for
b-hadron production, we show that the notorious excess of the Tevatron data
over existing theoretical calculations can be ascribed, at sufficiently large
values of p_T, to nonperturbative fragmentation effects inadequately included
previously.


title: Precision Electroweak Measurements Circa 2002

abstract:
  Present global fits to electroweak data are characterized by two results that
differ from Standard Model expectations by about 3 sigma, the NuTeV measurement
of sin^2theta_W and the FB b quark asymmetries measured at LEP. I review
possible SM and new physics explanations of these anomalies and the
implications for the indirect determination of the Higgs mass.


title:
Impact of Bottom-Quark Measurements on our Knowledge of the Standard
  Model

abstract:
  In this decade, B-decay experiments will allow stringent tests of the
Standard-Model description of CP violation. After a classification of the main
strategies and a discussion of the most recent results on benchmark decay modes
of $B^\pm$ and $B_d$ mesons, we focus on the "El Dorado" for hadron colliders,
the $B_s$-meson system, discussing the differences between the $B_d$ and $B_s$
systems, as well as prominent $B_s$ modes. First access to these decays is
already provided by run II of the Tevatron. In the LHC era, it will be possible
to fully exploit their physics potential, in particular at LHCb and BTeV.


title:
Large Scale Structure from the Higgs fields of the Supersymmetric
  Standard Model

abstract:
  We propose an alternative implementation of the curvaton mechanism for
generating the curvature perturbations which does not rely on a late decaying
scalar decoupled from inflation dynamics. In our mechanism the supersymmetric
Higgs scalars are coupled to the inflaton in a hybrid inflation model, and this
allows the conversion of the isocurvature perturbations of the Higgs fields to
the observed curvature perturbations responsible for large scale structure to
take place during reheating. We discuss an explicit model which realises this
mechanism in which the $\mu$ term in the Higgs superpotential is generated
after inflation by the vacuum expectation value of a singlet field. The main
prediction of the model is that the spectral index should deviate significantly
from unity, $|n-1|\sim 0.1$. We also expect relic isocurvature perturbations in
neutralinos and baryons, but no significant departures from gaussianity and no
observable effects of gravity waves in the CMB spectrum.


title: A Supersymmetric Standard Model of Inflation with Extra Dimensions

abstract:
  We embed the supersymmetric standard model of hybrid inflation based on the
next-to-minimal superpotential term $\lambda NH_uH_d$ supplemented by an
inflaton term $\kappa \phi N^2$, into an extra-dimensional framework, in which
all the Higgs fields and singlets live in the bulk, while all the matter fields
live on the brane. All the parameters of the effective 4d model can then be
naturally understood in terms of a fundamental (``string'') scale $M_*\sim
10^{13}$ GeV and a brane supersymmetry breaking scale $10^{8}$ GeV, of the same
order as the height of the inflaton potential during inflation. In particular
the very small Yukawa couplings $\lambda \sim \kappa \sim 10^{-10}$ necessary
for the model to solve the strong CP problem and generate the correct effective
$\mu$ term after inflation, can be naturally understood in terms of volume
suppression factors. The brane scalar masses are naturally of order a TeV while
the bulk inflaton mass is naturally in the MeV range sufficient to satisfy the
slow roll constraints. Curvature perturbations are generated after inflation
from the isocurvature perturbations of the supersymmetric Higgs as discussed in
a companion paper.


title: On power corrections to event shapes

abstract:
  Recent work on the theme of power corrections in perturbative QCD is briefly
reviewed, with an emphasis on event shapes in e+ e- annihilation. The
factorization of soft gluon effects is the main tool: it leads to resummation,
and thus highlights the limitations of perturbation theory, pointing to
nonperturbative corrections whose size can be estimated. Power corrections can
be resummed into shape functions, for which QCD--based models are available.
Theoretical progress is closing in on the nonperturbative frontier.


title:
A determination of alpha_s from scaling violations with truncated
  moments

abstract:
  We describe a determination of the strong coupling alpha_s(M_Z) from scaling
violations of the nonsinglet DIS structure function, which is based on two
novel techniques aimed at controlling and minimizing the theoretical error: a
neural network parametrization of BCDMS and NMC data, and QCD evolution by
means of truncated Mellin moments.


title:
Momentum dependence of the spectral functions in the O(4) linear sigma
  model at finite temperature

abstract:
  The spatial momentum dependence of the spectral function for pi and sigma at
finite temperature is studied by employing the O(4) linear sigma model and
adopting a resummation technique called optimized perturbation theory (OPT).


title: Nambu-Goldstone Bosons in CP Violating theory with Majorana Masses

abstract:
  We derive some properties of the Nambu-Goldstone boson coupling in theories
that have CP violation and Majorana masses. We show explicitly that its
diagonal coupling to a Majorana fermion is pseudoscalar not scalar. This
clarifies some confusion in the literature. Some potentially useful
off-diagonal properties are also derived. We also show, in the process, that
the Goldstone theorem often produces interesting and nontrivial identities in
matrix theory which may be hard to prove otherwise.


title: SUSY Signatures at LHC

abstract:
  The ATLAS and CMS Collaborations at the CERN Large Hadron Collider (LHC) have
devoted considerable effort to the study of SUSY signatures and measurements.
This talk provides an overview of what can be learned at the LHC if TeV-scale
SUSY exists.


title: Spectator Interactions in Soft-Collinear Effective Theory

abstract:
  Soft-collinear effective theory is generalized to include soft massless
quarks in addition to collinear fields. This extension is necessary for the
treatment of interactions with the soft spectator quark in a heavy meson. The
power counting of the relevant fields and the construction of the effective
Lagrangian are discussed at leading order in Lambda/m_b. Several novel effects
occur in the matching of full-theory amplitudes onto effective-theory operators
containing soft light quarks, such as the appearance of an intermediate mass
scale and large non-localities of operators on scales of order 1/Lambda.
Important examples of effective-theory operators with soft light quarks are
studied and their renormalization properties explored. The formalism presented
here forms the basis for a systematic analysis of factorization and power
corrections for any exclusive B-meson decay into light particles.


title: CMB Anisotropy from Baryogenesis by a Scalar Field

abstract:
  We study the cosmic microwave background (CMB) anisotropy in the scenario
where the baryon asymmetry of the universe is generated from a condensation of
a scalar field. In such a scenario, the scalar condensation may acquire
fluctuation during the inflation which becomes a new source of the cosmic
density perturbations. In particular, the primordial fluctuation of the scalar
condensation may induce correlated mixture of the adiabatic and isocurvature
fluctuations. If the scalar condensation decays before it completely dominates
the universe, the CMB angular power spectrum may significantly deviate from the
conventional adiabatic result. Such a deviation may be observed in the on-going
MAP experiment.


title:
The Body Center Cubic Quark Lattice Model (A Modification and Further
  Development of the Quark Model)

abstract:
  We assume that the u quarks and the d quarks constitute a body center cubic
quark lattice in the vacuum. Using energy band theory, we deduce an excited
quark spectrum (from the quark lattice). Using the accompanying excitation
concept, we deduce a baryon spectrum (including S, C, b, I, Q, and mass) from
the quark spectrum. With a phenomenological binding energy formula, we deduce a
meson spectrum (including S, C, b, I, Q, and mass) from the quark spectrum. The
baryon and meson spectra agree well with experimental results. The BCC Quark
Model predicts many new quarks (u'(3), d'(6)), baryons ($\Lambda^0(4280)$,
$\Lambda_{C}^{+}(6600)$, $\Lambda_{b}^{0}(9960))$, and mesons (K(3597),
D(5996), B(9504), $\eta(5926)$, $\Upsilon(17805)$, T(1603) with I=2). The
quarks u'(3) and d'(6) and the meson T(1603) have already been discovered.


title: Exclusive Decays and Lifetime of B_c Meson in QCD sum rules

abstract:
  We summarize theoretical calculations of B_c decays and lifetime in the
framework of QCD sum rules and compare the results with the estimates by the
methods of Operator Product Expansion in the inverse heavy quark masses as well
as of potential quark models. The agreement of estimates in the various
approaches is discussed. The features of B_c decay modes are considered.


title:
Large scale magnetogenesis from a non-equilibrium phase transition in
  the radiation dominated era

abstract:
  We study the generation of large scale primordial magnetic fields by a
cosmological phase transition during the radiation dominated era. The setting
is a theory of N charged scalar fields coupled to an abelian gauge field, that
undergoes a phase transition at a critical temperature much larger than the
electroweak scale. The dynamics after the transition features two distinct
stages: a spinodal regime dominated by linear long-wavelength instabilities,
and a scaling stage in which the non-linearities and backreaction of the scalar
fields are dominant. This second stage describes the growth of horizon sized
domains. We implement a recently introduced formulation to obtain the spectrum
of magnetic fields that includes the dissipative effects of the plasma. We find
that large scale magnetogenesis is very efficient during the scaling regime.
The ratio between the energy density on scales larger than L and that in the
background radiation r(L,T) = rho_B(L,T)/rho_{cmb}(T) is r(L,T) \sim 10^{-34}
at the Electroweak scale and r(L,T) \sim 10^{-14} at the QCD scale for L \sim 1
Mpc. The resulting spectrum is insensitive to the magnetic diffusion length. We
conjecture that a similar mechanism could be operative after the QCD chiral
phase transition.


title: Universal Extra Dimensions and the Higgs Boson Mass

abstract:
  We study the combined constraints on the compactification scale 1/R and the
Higgs mass m_H in the standard model with one or two universal extra
dimensions. Focusing on precision measurements and employing the
Peskin-Takeuchi S and T parameters, we analyze the allowed region in the (m_H,
1/R) parameter space consistent with current experiments. For this purpose, we
calculate complete one-loop KK mode contributions to S, T, and U, and also
estimate the contributions from physics above the cutoff of the
higher-dimensional standard model. A compactification scale 1/R as low as 250
GeV and significantly extended regions of m_H are found to be consistent with
current precision data.


title: Proton Decay

abstract:
  We discuss the status of supersymmetric grand unified theories [SUSY GUTs]
with regards to the observation of proton decay. In this talk we focus on SUSY
GUTs in 4 dimensions. We outline the major theoretical uncertainties present in
the calculation of the proton lifetime and then present our best estimate of an
absolute upper bound on the predicted proton lifetime. Towards the end, we
consider some new results in higher dimensional GUTs and the ramifications for
proton decay.


title: Higgs and SUSY Particle Predictions from SO(10) Yukawa Unification

abstract:
  In this talk we assume SO(10) boundary conditions at the GUT scale, including
unification for the third generation Yukawa couplings $\lambda_t = \lambda_b =
\lambda_\tau$. We find that this assumption is only consistent with the low
energy data in a narrow region of soft SUSY breaking parameter space. We
discuss the consequences of this result for Higgs and SUSY searches.


title: Studying Kaon-pion S-wave scattering in K-matrix formalism

abstract:
  We generalize our previous work on \pi\pi scattering to K\pi scattering, and
re-analyze the experiment data of K\pi scattering below 1.6 GeV. Without any
free parameter, we explain K\pi I=3/2 S-wave phase shift very well by using
t-channel rho and u-channel K^* meson exchange. With the t-channel and
u-channel meson exchange fixed as the background term, we fit the K\pi I=1/2
S-wave data of the LASS experiment quite well by introducing one or two
s-channel resonances. It is found that there is only one s-channel resonance
between K\pi threshold and 1.6 GeV, i.e., K_0^*(1430) with a mass around
1438~1486 MeV and a width about 346 MeV, while the t-channel rho exchange gives
a pole at (450-480i) MeV for the amplitude.


title:
Spin-dependent, interference and $T-$odd fragmentation and fracture
  functions

abstract:
  Fracture functions, originally suggested to describe the production of
diffractive and leading hadrons in semi-inclusive DIS, may be also applied at
fixed target energies. They may also include interference and final state
interaction, providing a source for azimuthal asymmetries at HERMES and
(especially) $\Lambda$ polarization at NOMAD. The recent papers by Brodsky,
Hwang and Schmidt, and by Gluck and Reya, may be understood in terms of
fracture functions.


title:
Genuine twist 3 in exclusive electroproduction of transversely polarized
  vector mesons

abstract:
  We present the detailed analysis of genuine twist-3 contributions to the
exclusive electroproduction amplitude of transversely polarized vector mesons.
Using the formalism based on the QCD factorization in the momentum
representation we calculated all the genuine twist-3 terms and found the total
expression of this amplitude at 1/Q level. Generally speaking, these terms
violate standard factorization owing to the existence of the infrared
divergencies in the amplitude of hard sub-processes, although the strongest
divergencies cancel due to the QCD equations of motion. We discuss the possible
treatment of surviving divergencies.


title:
Scalar Dipion States Produced in Heavy Quarkonium Decays and the Final
  State Interaction

abstract:
  We study phenomenologically the invariant mass spectra of scalar dipion
states produced in cascade decays of excited $\Upsilon$ and $\psi$, and
$J/\psi$ decays into light vector meson. Dipion production amplitude is given
as a product of the Born term and an effective scalar form factor written in
terms of a unitarized chiral theory. The model reproduces the experimental mass
spectra very well.


title: Multiparticle production in the model with antishadowing

abstract:
  We discuss the role of absorbtion and antishadowing in particle production.
We reproduce power-like energy behavior of the mean multiplicity in the model
with antishadowing and discuss physical implications of such behavior for the
hadron structure.


title: Probing the QCD Equation of State

abstract:
  We propose a novel quasiparticle interpretation of the equation of state of
deconfined QCD at finite temperature. Using appropriate thermal masses, we
introduce a phenomenological parametrisation of the onset of confinement in the
vicinity of the phase transition. Lattice results of bulk thermodynamic
quantities are well reproduced, the extension to small quark chemical potential
is also successful. We then apply the model to dilepton production and charm
suppression in ultrarelativistic heavy-ion collisions.


title: A BCS Condensate in NJL_3+1 ?

abstract:
  We present results from a lattice Monte Carlo study of the Nambu -
Jona-Lasinio model in 3+1 dimensions with a baryon chemical potential mu=/=0.
As mu is increased there is a transition from a chirally-broken phase to
relativistic quark matter, in which baryon number symmetry appears
spontaneously broken by a diquark condensate at the Fermi surface, implying a
superfluid ground state. Finite volume corrections to this relativistic BCS
scenario, however, are anomalously large.


title: Search for Neutrino Mass and Dark Matter in Underground Experiments

abstract:
  Search for the neutrino mass and for cold dark matter in the Universe are at
present two of the most exciting fields of particle physics and cosmology. This
lecture will restrict itself on the search for neutralinos as cold dark matter,
and for the absolute scale of the masses of neutrinos, which are the favoured
hot dark matter candidates.


title: Grand Unification with Anomalous U(1) Symmetry

abstract:
  In this talk, we introduce a new scenario of grand unified theory (GUT) with
anomalous $U(1)_A$ gauge symmetry. Since generic interactions (including
non-renormalizable interactions) are introduced, once we fix the symmetry of
the theory, we can define the theory without O(1) coefficients. The number of
parameters to determine the symmetry is just 11 or 12 integer parameters which
are anomalous $U(1)_A$ charges(integer) for introduced multiplets. It is
surprising that the GUT scenario can explain doublet-triplet splitting, quark
and lepton masses and mixing angles. In neutrino sector, the scenario realizes
LMA solution for solar neutrino problem and large $U_{e3}=O(0.1)$. Moreover,
the scenario predicts that the unification scale becomes smaller than the usual
GUT scale, namely proton decay via dimension 6 operators may be seen in future
experiments. This talk is based on the
papers\cite{maekawa,maekawa2,maekawa3,BM,MY}.


title: $\sigma(e^+e^-\to{hadrons})$ and the Heavy Quark Masses

abstract:
  The precise data for the total cross section $\sigma(e^+e^-\to{hadrons})$
from the charm threshold region, when combined with the evaluation of moments
with three loop accuracy, lead to a direct determination of the short distance
$\bar{\rm MS}$ charm quark mass $m_c(m_c)=1.304(27)$. Applying the same
approach to the bottom quark we obtain $m_b(m_b)=4.191(51)$ GeV. A
complementary method for the determination of $m_b$ is based of the analysis of
the $\Upsilon(1S)$ system which is confronted with a
next-to-next-to-next-to-leading order calculation of the corresponding energy
level. This leads to $m_b(m_b)=4.346(70)$ GeV.


title: Landau-Pomeranchuk-Migdal resummation for dilepton production

abstract:
  We consider the thermal emission rate of dileptons from a QCD plasma in the
small invariant mass ($Q^2 \sim \gs^2 T^2$) but large energy ($q^0 \gsim T$)
range. We derive an integral equation which resums multiple scatterings to
include the LPM effect; it is valid at leading order in the coupling. Then we
recast it as a differential equation and show a simple algorithm for its
solution. We present results for dilepton rates at phenomenologically
interesting energies and invariant masses.


title: Neutrinoless Double Beta Decay and the Neutrino Mass Matrix

abstract:
  Double beta decay is indispensable to solve the question of the neutrino mass
matrix together with $\nu$ oscillation experiments. Recent analysis of the most
sensitive experiment since eight years - the HEIDELBERG-MOSCOW experiment in
Gran-Sasso - yields evidence for the neutrinoless decay mode. This result is
the first evidence for lepton number violation and proves the neutrino to be a
Majorana particle. We give the present status of the analysis in these
Proceedings. It excludes several of the neutrino mass scenarios allowed from
present neutrino oscillation experiments - essentially only degenerate and
partially degenerate mass scenarios survive. This result allows neutrinos to
still play an important role as dark matter in the Universe. To improve the
present result, considerably enlarged experiments are required, such as GENIUS.
A GENIUS Test Facility has just been funded and will come into operation by end
of 2002.


title: Measurement of the Muon Anomalous Magnetic Moment to 0.7 ppm

abstract:
  The experimental method together with the analysis method and results of the
data taken in 2000 and prospects of the muon anomalous magnetic and electric
dipole moment experiments are presented here.


title: Disentangling fundamental MSSM Parameters: Light Gaugino/Higgsino System

abstract:
  In order to reveal the underlying structure of Supersymmetry one has to
determine the low--energy parameters without assuming a specific SUSY breaking
scheme. In this paper we show a procedure how to determine M_1, \Phi_{M_1},
M_2, \mu, \Phi_{\mu} and \tan\beta even in the case when only light charginos
\tilde{\chi}^{\pm}_1 and neutralinos \tilde{\chi}^0_1, \tilde{\chi}^0_2 would
be accessible at the first stage of a future Linear Collider with polarized
beams.


title:
Impact of Tau Polarization for the determination of high \tan\beta and
  A_{\tau}

abstract:
  In order to determine the fundamental MSSM parameters M_1, M_2, \mu and
\tan\beta the tau polarization from stau decays can be explored as a `bridge'
between the gaugino/higgsino and the stau sector in particular in the high
\tan\beta range. Even in the case of high \tan\beta an accuracy of
\delta(\tan\beta)\approx 5% with an simultanous determination of A_{\tau} is
possible without assuming a specific SUSY breaking scheme.


title: Two Loop Electroweak Bosonic Corrections to the Muon Decay Lifetime

abstract:
  A review of the calculation of the two loop bosonic corrections to $\Delta r$
is presented. Factorization and matching onto the Fermi model are discussed. An
approximate formula, describing the quantity over the interesting range of
Higgs boson mass values from 100 GeV to 1 TeV is given.


title: Dark matter and Consequences of SUSY

abstract:
  We examine here the constraints from the amount of relic density of
neutralino dark matter and other experiments have on the SUSY parameter space
for the mSUGRA model and for models with non-universal soft breaking at the GUT
scale. In mSUGRA, the allowed amount of dark matter restricts the SUSY
parameter space to a narrow band in m_0 - m_{1/2} (except at very large
\tan\beta). The Higgs mass and b-> s\gamma constraints produce a lower bound of
m_{1/2}>~{\sim} 300GeV and if the muon magnetic moment anomaly can be
interpreted as a 3\sigma deviation from the Standard Model, one also obtains an
upper bound of m_{1/2} <~900 GeV, making the SUSY spectrum well accessible to
the LHC. The B_s->\mu \mu decay is seen to be accessible to the Tevatron Run2B
with 15 fb^{-1} for \tan\beta>~30. However, only parts of the spectrum will be
accessible to the NLC if it's energy is below 800GeV. Non-universal soft
breaking opens new regions of parameter space. Thus the m_{1/2} lower bound
constraint of b->s\gamma and also the Higgs mass can be reduced greatly if the
gluino mass is assumed larger at the GUT scale (allowing for a lighter gaugino
spectrum), and non-universal Higgs soft breaking masses at the GUT scale can
open new allowed regions at relatively low m_{1/2} and high m_0 where dark
matter detection cross sections may be increased by a factor of ten or more.


title: Black Holes at Future Colliders and Beyond - a Review

abstract:
  As was suggested about a year ago, one of the most dramatic consequences of
low-scale (~1 TeV) quantum gravity is copious production of mini black holes at
future accelerators and in ultra-high-energy cosmic ray collisions. Hawking
radiation of these black holes is constrained mainly to our (3+1)-dimensional
world and results in rich phenomenology. With the original idea having been
cited over a hundred times since its appearence, we review the current status
of astrophysical observations of black holes and selected topics in the mini
black hole phenomenology, such as production rates at colliders and in cosmic
rays, Hawking radiation as a sensitive probe of the dimensionality of extra
space, as well as an exciting possibility of finding new physics in the decays
of black holes.


title: On search for new Higgs physics in CDF at the Tevatron

abstract:
  We discuss the Higgs boson mass sum rules in the Minimal Supersymmetric
Standard Model in order to estimate the upper limits on the masses of stop
quarks as well as the lower bounds on the masses of the scalar Higgs boson
state. The bounds on the scale of quark-lepton compositeness derived from the
CDF Collaboration (Fermilab Tevatron) data and applied to new extra gauge boson
search is taken into account. These extra gauge bosons are considered in the
framework of the extended SU(2)_h \times SU(2)_l model. In addition, we discuss
the physics of rare decays of the MSSM Higgs bosons in both CP-even and CP-odd
sectors and also some extra gauge bosons.


title:
Synchronised neutrino oscillations from self interaction and associated
  applications

abstract:
  A recent revival of interest in synchronised oscillations due to
neutrino--neutrino forward scattering in dense gases has led to two interesting
applications with notable outcomes: (i) cosmological bounds on
neutrino--antineutrino asymmetries are improved owing to flavour equilibration
prior to the onset of big bang nucleosynthesis, and (ii) a neutron-rich
environment required for $r$-process nucleosynthesis is shown to be always
maintained in a supernova hot bubble irrespective of flavour oscillations,
contrary to results from previous studies. I present in this talk a pedagogical
review of these works.


title: Charmed Hadron Production in Polarized pp Collisions

abstract:
  To extract information about polarized gluons in the proton, production of
charmed hadrons, in particular, \Lambda_c^+ baryon in pp collisions was
studied. We calculated the transverse momentum distribution and the
pseudo-rapidity distribution of the spin correlation asymmetry A_{LL} between
the initial proton and the produced \Lambda_c^+. Those statistical
sensitivities were also calculated under the condition of RHIC experiment. We
found that the pseudo-rapidity distribution of A_{LL} is promising for testing
the model of polarized gluons in the proton and also the spin-dependent
fragmentation model of a charm quark decaying into \Lambda_c^+ baryon.


title: Measurement of the Higgs self-coupling at JLC

abstract:
  We examine the double Higgs production process at JLC. We focus our attention
on the measurement of the Higgs self-coupling. The sensitivity of the triple
Higgs coupling measurement is discussed in the Higgs mass range 100-200 GeV and
the center of mass energy to be 500 GeV-1.5 TeV.


title:
On relation between unitary gauge and gauge given by $\xi$-limiting
  process

abstract:
  It is shown that in general the gauge given by the limit of $\xi \to 0$ in
$R_\xi$ gauge does not necessarily agree with the unitary gauge by examining
the symmetry breaking of two steps from ${\rm SU(3) \otimes U(1)}_N$ to ${\rm
SU(2) \otimes U(1)}_Y$ and then to ${\rm U(1)}_{em}$.


title: Optically opaque color-flavor locked phase inside compact stars

abstract:
  The contribution of thermally excited electron-positron pairs to the bulk
properties of the color-flavor locked quark phase inside compact stars is
examined. The presence of these pairs causes the photon mean free path to be
much smaller than a typical core radius ($R_0 \simeq 1$ km) for all
temperatures above 25 keV so that the photon contribution to the thermal
conductivity is much smaller than that of the Nambu-Goldstone bosons. We also
find that the electrons and positrons dominate the electrical conductivity,
while their contributions to the total thermal energy is negligible.


title: Handedness inside the proton

abstract:
  The transversity of quarks inside unpolarized hadrons and its phenomenology
are discussed. Several experimental suggestions are proposed that would allow
further study of this intrinsic handedness.


title: Calculation on the Lifetime of Polarized Muons in Flight

abstract:
  The fermion lifetime was usually calculated in terms of spin states. However,
after comparing spin states with helicity states and chirality states, it is
pointed out that a spin state is helicity degenerate, and so it can not be used
for discussion of the dependence of lifetime on the polarization of an
initial-state fermion. Using helicity states, we calculate the lifetime of
polarized muons. The result shows that the lifetime of right-handed polarized
muons is always greater than that of left-handed polarized muons with the same
speed in flight.


title: Summary of Working Group 3 of the Neutrino Factory '02 Workshop

abstract:
  The parallel sessions of the working group 3 were devoted to the discussions
of short-baseline neutrino physics program at neutrino factories. First,
possible studies of parton distribution functions (PDFs), in particular nuclear
and polarized PDFs, are discussed in this summary. Second, the extractions of
alpha_s from sum rules and structure functions of deep-inelastic
neutrino-nucleon scattering, higher-order perturbative QCD corrections and
estimates of high-twist effects are summarized. Third, the situation of the
observed NuTeV sin^2 theta_W anomaly is discussed.


title:
Three-generation study of neutrino spin-flavor conversion in supernova
  and implication for neutrino magnetic moment

abstract:
  We investigate resonant spin-flavor (RSF) conversions of supernova neutrinos
which are induced by the interaction of neutrino magnetic moment and supernova
magnetic fields. From the formulation which includes all three-flavor neutrinos
and anti-neutrinos, we give a new crossing diagram that includes not only
ordinary MSW resonance but also magnetically-induced RSF effect. With the
diagram, it is found that four conversions occur in supernova, two are induced
by the RSF effect and two by the pure MSW. We also numerically calculate
neutrino conversions in supernova matter, using neutrino mixing parameters
inferred from recent experimental results and a realistic supernova progenitor
model. The results indicate that until 0.5 seconds after core bounce, the
  RSF-induced $\bar{\nu}_e \leftrightarrow \nu_\tau$ transition occurs
efficiently (adiabatic resonance), when $\mu_\nu \agt 10^{-12} \mu_B
  (B_0 / 5 \times 10^{9} \mathrm G)^{-1}$, where $B_0$ is the strength of the
magnetic field at the surface of iron core. We also evaluate the energy
spectrum as a function of $\mu_\nu B_0$ at the SuperKamiokande detector and the
Sudbury Neutrino Observatory using the calculated conversion probabilities, and
find that the spectral deformation might have possibility to provide useful
information on neutrino magnetic moment as well as magnetic field strength in
supernovae.


title: Neutrino Masses and Mixing: Where We Stand and Where We are Going

abstract:
  In this talk I review our present knowledge on neutrino masses and mixing as
well as the expectations from near future experiments.


title:
Heavy charged Higgs boson production at next generation $\gamma\gamma$
  colliders

abstract:
  We investigate the scope of all relevant production modes of charged Higgs
bosons in the MSSM, with mass larger than the one of the top quark, at future
Linear Colliders operating in $\gamma\gamma$ mode at the TeV energy scale.
Final states with one or two $H^\pm$ bosons are considered, as produced by both
tree- and loop-level interactions


title: Flavor Physics and Warped Extra Dimensions

abstract:
  We consider a five dimensional model with warped geometry where the standard
model fermions and gauge bosons correspond to bulk fields. Fermion masses and
CKM mixings can be explained in a geometrical picture, without hierarchical
Yukawa couplings. We discuss various flavor violating processes induced by
(excited) gauge boson exchange and non-renormalizable operators. Some of them,
such as muon-electron conversion, are in the reach of next generation
experiments.


title: The QCD gluon ladders and HERA structure function

abstract:
  We report on the extension of the data fitting considering the QCD inspired
model based on the summation of gluon ladders applied to the $ep$ scattering.
In lines of a two Pomeron approach, the structure function $F_2$ has a hard
piece given by the model and the remaining soft contribution: a soft Pomeron
and non-singlet content. In this contribution, we carefully estimate the
relative role of the hard and the soft pieces from a global fit in a large span
of $x$ and $Q^2$.


abstract:
  I briefly summarize the parallel sessions on Automated Calculation and
Simulation Systems for high energy particle physics phenomenology at ACAT 2002
(Moscow State University, June 2002) and present a short overview over the
current status of the field and try to identify the important trends.


title: GUT Scale And Leptogenesis From 5D Inflation

abstract:
  We discuss a five dimensional inflationary scenario based on a supersymmetric
SO(10) model compactified on $S^1/(Z_2\times Z_2')$. Inflation is implemented
through scalar potentials on four dimensional branes, and a brane-localized
Einstein-Hilbert term is essential to make both brane vacuum energies positive
during inflation. The orbifold boundary conditions break the SO(10) gauge
symmetry to $SU(4)_c\times SU(2)_L\times SU(2)_R$ ($\equiv H$). The
inflationary scenario yields $\delta T/T\propto (M/M_{\rm Planck})^2$, which
fixes $M$, the symmetry breaking scale of $H$ to be close to the SUSY GUT scale
of $10^{16}$ GeV. The scalar spectral index $n$ is $0.98-0.99$, while the
gravitational wave contribution to the quadrupole anisotropy is negligible
($\lapproxeq 1 {%}$). The inflaton decay into the lightest right handed
neutrinos yields the observed baryon asymmetry via leptogenesis.


title: Transverse momentum, factorization and the HERMES experiment

abstract:
  I present some results about transverse momentum dependent distribution and
fragmentation functions. Firstly I illustrate a simple model, with predictive
power about the energy behavior, for T-odd, chiral odd functions. Moreover I
propose a slight modification in extracting transversity from HERMES data, so
as to apply correctly factorization. Lastly I suggest a method for determining
the quark transverse polarization in an unpolarized or spinless hadron.


title: Small Angle Scattering of Polarized Protons

abstract:
  Experiment E950 at AGS, BNL has provided data with high statistics for the
left-right asymmetry of proton-carbon elastic scattering in the Coulomb-nuclear
interference region of momentum transfer. It allows to access information about
spin properties of the Pomeron and has practical implications for polarimetry
at high energies. Relying on Regge factorization the results for the parameter
r_5, ratio of spin-flip to non-flip amplitudes, is compared with the same
parameter measured earlier in pion-proton elastic and charge exchange
scattering. While data for Im r_5 agree (within large systematic errors), there
might be a problem for Re r_5. The \pi N data indicate at a rather small
contribution of the f-Reggeon to the spin-flip part of the iso-scalar amplitude
which is dominated by the Pomeron. This conclusion is supported by direct
analysis of data for elastic and charge exchange pp and pn scattering which
also indicate at a vanishing real part of the hadronic spin-flip amplitude at
energies 20 GeV and higher. This is a good news for polarimetry, since the E950
results enhanced by forthcoming new measurements at AGS can be safely used for
polarimetry at RHIC at higher energies.


title:
After Sno and Before Kamland: Present and Future of Solar and Reactor
  Neutrino Physics

abstract:
  We present a short review of the existing evidence in favor of neutrino mass
and neutrino oscillations which come from different kinds of experiments. We
focus our attention in particular on solar neutrinos, presenting a review of
some recent analysis of all available neutrino oscillation evidence in Solar
experiments including the recent $SNO CC$ and $NC$ data. We present in detail
the power of the reactor experiment KamLAND for discriminating existing
solutions to the SNP and giving accurate information on neutrino masses and
mixing angles.


title: CP violation in charged Higgs boson decays into tau and neutrino

abstract:
  We calculate the CP-violating rate asymmetry of H^\pm decays into tau and
neutrino at one loop in the MSSM with complex parameters. We find that the
asymmetry is typically of the order of 10^-3, depending mainly on the phases of
the trilinear coupling A_\tau and of the gaugino mass M_1.


title: CDM in Supersymmetric Models

abstract:
  The supersymmetric extension to the Standard Model offers a promising cold
dark matter candidate, the lightest neutralino. I will review the
phenomenological and cosmological constraints on the supersymmetric parameter
space and discuss the prospects for the detection of this candidate in both
accelerator and direct detection searches.


title: Recent Developments in Precision Electroweak Physics

abstract:
  Developments in precision electroweak physics in the two years since the
symposium are briefly summarized.


title: Extra matter at low energy

abstract:
  Assuming that the Standard Model arises from the $E_8\times E_8$ Heterotic
Superstring, we try to solve the discrepancy between the unification scale
predicted by this theory ($\approx g_{GUT}\times 5.27\cdot 10^{17}$ GeV) and
the value deduced from LEP experiments ($\approx 2\cdot 10^{16}$ GeV). This
will allow us to predict the presence at low energies of three generations of
supersymmetric Higgses and vector-like colour triplets.


title: The Standard Model and the Top Quark

abstract:
  The top quark is one of the least well-studied components of the standard
model. In these lectures I discuss the expected properties of the top quark,
which will be tested at the Fermilab Tevatron and the CERN Large Hadron
Collider. I begin with a modern review of the standard model, emphasizing the
underlying concepts. I then discuss the role the top quark plays in precision
electroweak analyses. The last two lectures address the strong and weak
interactions of the top quark, with an emphasis on the top-quark spin.


title: Lepton Flavor Violation and the Origin of the Seesaw Mechanism

abstract:
  The right--handed neutrino mass matrix that is central to the understanding
of small neutrino masses via the seesaw mechanism can arise either (i) from
renormalizable operators or (ii) from nonrenormalizable or super-renormalizable
operators, depending on the symmetries and the Higgs content of the theory
beyond the Standard Model. In this paper, we study lepton flavor violating
(LFV) effects in the first class of seesaw models wherein the \nu_R Majorana
masses arise from renormalizable Yukawa couplings involving a B-L = 2 Higgs
field. We present detailed predictions for \tau -> \mu + \gamma and \mu -> e +
\gamma branching ratios in these models taking the current neutrino oscillation
data into account. Focusing on minimal supergravity models, we find that for a
large range of MSSM parameters suggested by the relic abundance of neutralino
dark matter and that is consistent with Higgs boson mass and other constraints,
these radiative decays are in the range accessible to planned experiments. We
compare these predictions with lepton flavor violation in the second class of
models arising entirely from the Dirac Yukawa couplings. We study the
dependence of the ratio r \equiv B(\mu -> e+\gamma)/B(\tau ->\mu +\gamma) on
the MSSM parameters and show that measurement of r can provide crucial insight
into the origin of the seesaw mechanism.


title: Factorization and Endpoint Singularities in Heavy-to-Light decays

abstract:
  We prove a factorization theorem for heavy-to-light form factors. Our result
differs in several important ways from previous proposals. A proper separation
of scales gives hard kernels that are free of endpoint singularities. A general
procedure is described for including soft effects usually associated with the
tail of wavefunctions in hard exclusive processes. We give an operator
formulation of these soft effects using the soft-collinear effective theory,
and show that they appear at the same order in the power counting as the hard
spectator contribution.


title: Color-flavor locked strange matter

abstract:
  We analyze how the CFL states in dense matter work in the direction of
enhancing the parameter space for absolutely stable phases (strange matter). We
find that the "CFL strange matter" phase can be the true ground state of
hadronic matter for a much wider range of the parameters of the model (the gap
of the QCD Cooper pairs $\Delta$, the strange quark mass $m_s$ and the Bag
Constant $B$) than the state without any pairing, and derive a full equation of
state and an accurate analytic approximation to the lowest order in $\Delta$
and $m_{s}$ which may be directly used for applications. The effects of pairing
on the equation of state are found to be small (as previously expected) but not
negligible and may be relevant for astrophysics.


title:
Relic Neutralino Densities and Detection Rates with Nonuniversal Gaugino
  Masses

abstract:
  We extend previous analyses on the interplay between nonuniversalities in the
gaugino mass sector and the thermal relic densities of LSP neutralinos, in
particular to the case of moderate to large tan beta. We introduce a set of
parameters that generalizes the standard unified scenario to cover the complete
allowed parameter space in the gaugino mass sector. We discuss the physical
significance of the cosmologically preferred degree of degeneracy between
charginos and the LSP and study the effect this degree of degeneracy has on the
prospects for direct detection of relic neutralinos in the next round of dark
matter detection experiments. Lastly, we compare the fine tuning required to
achieve a satisfactory relic density with the case of universal gaugino masses,
as in minimal supergravity, and find it to be of a similar magnitude. The
sensitivity of quantifiable measures of fine-tuning on such factors as the
gluino mass and top and bottom masses is also examined.


title:
Quartic Gauge Boson Couplings and Tree Unitarity in the SU(3)_C X
  SU(3)_L X U(1)_N Models

abstract:
  The quartic gauge boson couplings in the ${SU(3)}_C \otimes {SU(3)}_L \otimes
{U(1)}_N$ models are presented. We find that the couplings of four {\it
differrent} gauge bosons may have unusual Lorentz structure and the couplings
sastify the tree unitarity requirement at high energy limit.


title:
Grand unification of flavor by orbifold twisting $Z_2$ and $Z_2\times
  Z_2^\prime$

abstract:
  The grand unification of flavor(GUF) in extra dimensions is discussed. After
reviewing the old GUF, I present a GUF model SU(7) in 5D with the recently
popular field theoretic orbifold compactification.


title:
Can radiative magnification of mixing angles occur for two-zero neutrino
  mass matrix textures?

abstract:
  Neutrino Majorana masses and mixings can be generated from a dimension-5
operator within the standard model particle content. After a review of the
mechanism of radiative enhancement of the mixing angle in a two-neutrino case,
we consider three-flavour mass matrices of two-zero texture generated from such
an operator and investigate the possibility of implementing the mechanism here.
We observe that radiative magnification of only the solar angle is consistent
with oscillation data on masses and mixings, and that too for nearly degenerate
neutrinos, with two of them having opposite CP parities, while for hierarchical
masses the mechanism does not work. In supersymmetry or in an extra-dimensional
scenario the above features are qualitatively unchanged.


title:
Empirical Emission Functions for LPM Suppression of Photon Emission from
  Quark-Gluon Plasma

abstract:
  The LPM suppression of photon emission rates from the quark gluon plasma have
been studied at different physical conditions of the plasma given by
temperature and chemical potentials.The integral equation for the transverse
vector function (f(p_t)) consisting of multiple scattering effects is solved
for the parameter set {p,k,kappa,T}, for bremsstrahlung and AWS processes. The
peak positions of these distributions depend only on the dynamical variable
x=(T/kappa)|1/p-1/(p+k)|. Integration over these distributions multiplied by
x^2 factor also depends on this variable x,leading to a unique global emission
function g(x) for all parameters. Empirical fits to this dimensionless emission
function, g(x), are obtained. The photon emission rate calculations with LPM
suppression effects reduce to one dimensional integrals involving folding over
the empirical g(x) function with appropriate distribution functions and the
kinematic factors. Using this approach, the suppression factors for both
bremsstrahlung and AWS have been estimated for various chemical potentials and
compared with the variational method.


title: Reconstruction of Fundamental SUSY Parameters

abstract:
  We summarize methods and expected accuracies in determining the basic
low-energy SUSY parameters from experiments at future e$^+$e$^-$ linear
colliders in the TeV energy range, combined with results from LHC. In a second
step we demonstrate how, based on this set of parameters, the fundamental
supersymmetric theory can be reconstructed at high scales near the grand
unification or Planck scale. These analyses have been carried out for minimal
supergravity [confronted with GMSB for comparison], and for a string effective
theory.


title: Exclusive rare decays of B and B_c mesons in a relativistic quark model

abstract:
  In these lectures we give, first, the model-independent analysis of the
exclusive rare decays B -> K l(bar) l and B_c -> D(D*) l(bar) l with special
emphasis on the cascade decay B_c -> D(*)(-> D pi) l(bar) l. We derive a
four-fold angular decay distribution for this process in terms of helicity
amplitudes including lepton mass effects. The four-fold angular decay
distribution allows to define a number of physical observables which are
amenable to measurement. Second, we calculate the relevant form factors within
a relativistic constituent quark model, for the first time without employing
the impulse approximation. The calculated form factors are used to evaluate
differential decay rates and polarization observables. We present results on a
set of observables with and without long-distance contributions. and compare
them with the results of other studies.


title:
Complex amplitude phase motion in Dalitz plot heavy meson three body
  decay

abstract:
  We propose a method to determine the phase motion of a complex amplitude in
three body heavy meson decays. We show that the phase variation of a complex
amplitude can be directly revealed through the interference observed in the
Dalitz Plot region where it crosses with a well established resonant state.
This method could be applied to the decays \d3pi and $D^+\to K^-\pi^+\pi^+$, to
determine whether the low mass states $\sigma$ and $\kappa$, suggested by E791,
have phase motions compatible with resonances.


title:
Heavy quark chemical potential as probe of the phase diagram of nuclear
  matter

abstract:
  We study the temperature dependence of the strange and charm quark chemical
potentials in the phase diagram of nuclear matter, within a modified and
generalized hadron gas model, in order to consider phase transitions and to
describe phenomena taking place outside the hadronic phase. We employ, in a
phenomenological way, the Polyakov loop and scalar quark condensate order
parameters, mass/temperature-scaled partition functions and enforce flavor
conservation. We propose that the resulting variation of the heavy quark
chemical potentials can be directly related to the quark deconfinement and
chiral phase transitions. Then, the chemical potential of the strange and charm
quark can be considered as an experimentally accessible "order parameter",
probing the phase diagram of QCD.


title:
Uncertainties of predictions from parton distributions. I: experimental
  errors

abstract:
  We determine the uncertainties on observables arising from the errors on the
experimental data that are fitted in the global MRST2001 parton analysis. By
diagonalizing the error matrix we produce sets of partons suitable for use
within the framework of linear propagation of errors, which is the most
convenient method for calculating the uncertainties. Despite the potential
limitations of this approach we find that it can be made to work well in
practice. This is confirmed by our alternative approach of using the more
rigorous Lagrange multiplier method to determine the errors on physical
quantities directly. As particular examples we determine the uncertainties on
the predictions of the charged-current deep-inelastic structure functions, on
the cross-sections for W production and for Higgs boson production via
gluon--gluon fusion at the Tevatron and the LHC, on the ratio of W-minus to
W-plus production at the LHC and on the moments of the non-singlet quark
distributions. We discuss the corresponding uncertainties on the parton
distributions in the relevant x,Q^2 domains. Finally, we briefly look at
uncertainties related to the fit procedure, stressing their importance and
using sigma_W, sigma_H and extractions of alpha_S(M_Z^2) as examples. As a
by-product of this last point we present a slightly updated set of parton
distributions, MRST2002.


title: Few-quark correlation in hot matters

abstract:
  We address the issue of three-quark clusters in a medium of finite
temperatures and densities. We use the light front approach and utilize a Green
function formalism. We consider first the isolated case using a zero-range
interaction and introducing an invariant cut-off and then medium effects. The
Mott lines are shown for different values of the cut-off.


title: Indirect Detection of Neutralino Dark Matter with Neutrino Telescopes

abstract:
  Principle of neutralino dark matter detection with neutrino telescopes and
predictions are reviewed. The future Antares detector is described. Prospection
in the CMSSM is exposed including comparison with experiment sensitivities of
both neutrino indirect detection and direct detection experiments. Results in
other frameworks are shortly surveyed. Models with a non negligible neutralino
higgsino fraction are promising for neutrino telescopes detection.


title: Can the polarization of the strange quarks in the proton be positive ?

abstract:
  Recently, the HERMES Collaboration at DESY, using a leading order QCD
analysis of their data on semi-inclusive deep inelastic production of charged
hadrons, reported a marginally positive polarization for the strange quarks in
the proton. We argue that a non-negative polarization is almost impossible.


title: Quark, Lepton and Neutrino Masses In Horava-Witten Inspired Models

abstract:
  Horava-Witten M-Theory offers new ways in achieving the quark and lepton mass
hierarchies not naturally available in supergravity unified models. In previous
work, based on a torus fibered Calabi-Yau manifold with a del Pezzo base dP_7,a
three generation SU(5)model with Wilson line breaking to the Standard Model was
constructed. It was seen that if the additional 5- branes clustered near the
distant orbifold plane, it was possible that such models could generate the
observed hierarchies of quark masses without undue fine tuning. We update these
results here and extend them to include the charged leptons. A new mechanism
for generating small neutrino masses (different from the ususal seesaw
mechanism)arises naturally from a possible cubic holomorphic term in the Kahler
potential when supersymmetry is broken. We show that the LMA solution to
neutrino masses can occur, with a good fit to all neutrino oscillation data.
The model implies the existance of the \mu -> e \gamma decay even for universal
slepton soft breaking masses, at rates accessible to the next round of
experiments.


title:
Exclusive Double-Charmonium Production from e^+ e^- Annihilation into a
  Virtual Photon

abstract:
  We calculate the exclusive cross sections for e^+ e^- annihilation into two
charmonium states through a virtual photon. Purely electromagnetic
contributions are surprisingly large, changing the cross sections by as much as
21%. The predicted cross section for J/psi + eta_c is about an order of
magnitude smaller than a recent measurement by the BELLE Collaboration,
although part of the discrepancy can be attributed to large relativistic
corrections. The cross sections for S-wave + P-wave, P-wave + P-wave, and
S-wave + D-wave charmonium states are also calculated. It may be possible to
discover the D-wave state eta_{c2}(1D) at the B factories through the mode
J/psi+\eta_{c2}, whose cross section is predicted to be about a factor of 10
smaller than J/psi + eta_c.


title:
Fluctuation Induced Critical Behavior at Non-Zero Temperature and
  Chemical Potential

abstract:
  We discuss phase transitions in relativistic systems as a function of both
chemical potential and temperature. The presence of a chemical potential
explicitly breaks Lorentz invariance and may additionally break other internal
symmetries. This introduces new subtleties in the determination of the critical
properties. We discuss separately three characteristic effects of a nonzero
chemical potential. Firstly, we consider only the explicit breaking of Lorentz
invariance using a scalar field theory with a global U(1) symmetry. Secondly,
we study the explicit breaking of an internal symmetry in addition to Lorentz
invariance using two--color QCD at nonzero baryonic chemical potential.
Finally, we consider the spontaneous breaking of a symmetry using three-color
QCD at nonzero baryonic and isospin chemical potential. For each case, we
derive the appropriate three-dimensional effective theory at criticality and
study the effect of the chemical potential on the fixed point structure of the
$\beta$-functions. We find that the order of the phase transition is not
affected by the explicit breaking of Lorentz invariance but is sensitive to the
breaking of additional symmetries by the chemical potential.


title: Anomaly Mediated Supersymmetry Breaking From a String Theory Perspective

abstract:
  The general form of soft supersymmetry breaking terms at one loop for
effective supergravity models based on the weakly-coupled heterotic string are
presented, with special emphasis on those terms arising from the superconformal
anomaly. The standard "anomaly-mediated" soft terms are observed to be a
special case of a more general class of models. Some phenomenological
consequences are considered and a comparison is made with scenarios involving
universal soft terms.


title: Comment on `Pressure of Hot QCD at large N_f'

abstract:
  It is argued why quasiparticle models can be useful to describe the
thermodynamics of hot QCD excluding, however, the case of a large number of
flavors, for which exact results have been calculated by Moore.


title:
Electroweak Radiative Corrections to Weak Boson Production at Hadron
  Colliders

abstract:
  We summarize the status of calculations of the electroweak radiative
corrections to W and Z boson production via the Drell-Yan mechanism at hadron
colliders. To fully exploit the precision physics potential of the
high-luminosity environment of the Fermilab Tevatron pbar p (Run II) and the
CERN LHC pp colliders, it is crucial that the theoretical predictions are well
under control. The envisioned precision physics program includes a precise
measurement of the W boson mass and width, and the (leptonic) weak mixing
angle, as well as probing the Standard Model (SM) of electroweak interactions
at the highest accessible center-of-mass energies. Some numerical results are
presented.


title: Virtual Photon Structure Functions

abstract:
  We discuss the perturbatively calculable virtual photon structure functions.
First we present the framework for analyzing the structure functions of the
virtual photon and derive a first moment of $g_1^\gamma$ of the virtual photon.
We then investigate the three positivity constraints satisfied by the eight
structure functions of the virtual photon.


title: Active neutrino Oscillations and the SNO neutral Current measurement

abstract:
  We discuss the relation between the observed CC, ES, and NC fluxes with the
flavor fractional content of the solar neutrino flux seen by SNO. By using
existing estimates of the cross sections for the charged and neutral current
reactions which take into account the detector resolution, we show how the
forthcoming SNO rates unconstrained by the standard $^8$B shape could test the
oscillations into active states. We perform a model independent analysis for
the Super-K and SNO data, assuming a non distorted spectrum.


title: Unification on gauge invariance and relativity

abstract:
  The inconsistence of Dirac-Weyl field equations with the universal U(1) gauge
invariance of neutrinos in quantum mechanics led to generalize the special
relativity to the generic relativity, which was composed of the special
relativity and its three analogues with different signatures of metrics. The
combination of the universal U(1) gauge invariance and the generic relativity
naturally deduced the strong gauge symmetries $% SU(3)$ and the electroweak
ones $SU(2)\times U(1)$ in the Standard Model. The universal U(1) gauge
invariance of elementary fermions is attributed to its nature of complex line
in three dimensional projective geometry.


title:
Generalized Parton Distributions and Generalized Distribution Amplitudes
  : New Tools for Hadronic Physics

abstract:
  The generalized parton distributions and the generalized distribution
amplitudes give access to a deeper understanding of the quark and gluon content
of hadrons. In this short review, we select some new developments of their
interesting connections with the physics information that one can extract from
exclusive reactions at medium and high energies.


title: Lorentz Symmetry and Ultra-High-Energy Cosmic Rays

abstract:
  We discuss the possibility of explaining the observation of ultra-high-energy
cosmic rays with energy above the GZK cutoff, saving the relativity principle
and the (possibly deformed) Lorentz symmetry, as proposed recently by several
authors. Since it is known that the Lie group structure of the Lorentz group
cannot be deformed, we study the deformations (up to isomorphisms) of the
mass-shell, considered as an abstract three-dimensional homogeneous space. We
find that in the massive case the mass-shell cannot be deformed and in the
massless case there are deformations, but their physical interpretation is
problematic. The components of the four-momentum are considered as (redundant)
coordinates on the abstract mass-shell. Reinterpreting an old result, we note
that if the four-momentum is conserved its components must be the usual ones,
with linear Lorentz transformation properties. Even if four-momentum is not
conserved at high center-of-mass energies, the linearly transforming
coordinates can always be used to describe in a convenient way the kinematics
of collision processes and they satisfy the GKZ cutoff. We suggest that, if one
wants to save the relativity principle, one should look for new physics in the
collisions between the ultra-high-energy cosmic rays and the nuclei of the high
atmosphere.


title:
Yet another correlation in the analysis of CP violation using a neutrino
  oscillation experiment

abstract:
  We investigate the effect induced by variations in the density profile of the
Earth's interior using a long-baseline neutrino oscillation experiment.
  At first, we point out two facts. (i) The most essential part of the matter
profile is the first Fourier mode of the matter profile function; and (ii) The
Earth models based on the study of seismology include a large uncertainty for
the first Fourier mode.
  Next, we show that there is a strong correlation between the average density
value and the first Fourier coefficient in the analysis of oscillation
probability.
  This means that the matter profile effect induces added uncertainty for the
average matter parameter. %although the average density can be determined at a
few percent accuracy.
  Taking into account this extra uncertainty, we make numerical calculations
for the sensitivity to CP violation search and show that CP sensitivity is
impaired by this added uncertainty within a large $U_{e3}$ region.


title: Parton distributions from deep-inelastic-scattering data

abstract:
  We perform the analysis of existing light-targets deep-inelastic-scattering
(DIS) data in the leading-order (LO), next-to-leading-order (NLO), and
next-to-next-to-leading-order (NNLO) QCD approximations and extract PDFs
simultaneously with the value of the strong coupling constant $\alpha_s$ and
the high-twist contribution to the structure functions. The main theoretical
uncertainties and experimental uncertainties due to all sources of experimental
errors in data are estimated, the latter generally dominate for the obtained
PDFs. The uncertainty in Higgs boson production cross section due to errors in
PDFs is $\sim 2$% for the LHC and varies from 2% to 10% for the Fermilab
collider under variation of the Higgs boson mass from $100 {\rm GeV}$ to $300
{\rm GeV}$. For the $W$-boson production cross section the uncertainty is $\sim
2$% for the both colliders. The value of $\alpha^{\rm NNLO}_{\rm s}(M_{\rm
Z})=0.1143\pm 0.0014({\rm exp.})$ is obtained, while the high-twist terms do
not vanish up to the NNLO as required by comparison to data.


title:
Lepton Flavor Violating Processes in Bi-maximal Texture of Neutrino
  Mixings

abstract:
  We investigate the lepton flavor violation in the framework of the MSSM with
right-handed neutrinos taking the large mixing angle MSW solution in the
quasi-degenerate and the inverse-hierarchical neutrino masses. We predict the
branching ratio of $\mu \to e+\gamma$ processes assuming the degenerate
right-handed Majorana neutrino masses. We find that the branching ratio in the
quasi-degenerate neutrino mass spectrum is 100 times smaller than the ones in
the inverse-hierarchical and the hierarchical neutrino spectra. We emphasize
that the magnitude of $U_{e3}$ is one of important ingredients to predict
BR($\mu \to e +\gamma $). The effect of the deviation from the
complete-degenerate right-handed Majorana neutrino masses are also estimated.


title:
$ O(\alpha_s) $ corrections to polarized top decay into a charged Higgs
  $ t(\uparrow) \to H^+ + b $

abstract:
  We calculate the $ O(\alpha_s) $ radiative corrections to polarized top quark
decay into a charged Higgs boson and a massive bottom quark in two variants of
the two-Higgs-doublet model. The radiative corrections to the polarization
asymmetry of the decay may become as large as $ 25 % $. We provide analytical
formulae for the unpolarized and polarized rates for $ m_b \neq 0 $ and for $
m_b = 0 $. For $ m_b = 0 $ our closed-form expressions for the unpolarized and
polarized rates become rather compact.


title: Charge asymmetry in e^+- e^-, ep, e\gamma, \gamma\gamma collisions

abstract:
  Study of charge asymmetry within a neutral system T produced in processes
AB\to T X can help solve many problems in particle physics. We collect here
some problems, which have been studied well, as well as proposals for future
activity with a brief discussion of the main results expected in each case.


title:
$ SU(3) $ Classification of $ p $-Wave $ \eta\pi $ and $ \eta'\pi $
  Systems

abstract:
  An exotic meson, the $\pi_1(1400)$ with $J^{PC}=1^{-+}$, has been seen to
decay into a p-wave $\eta\pi$ system. If this decay conserves flavor SU(3),
then it can be shown that this exotic meson must be a four-quark state ($q\bar
q+q\bar q$) belonging to a flavor ${\bf10}\oplus{\bf\bar{10}}$ representation
of SU(3). In contrast, the $\pi_1(1600)$ with a substantial decay mode into
$\eta'\pi$ is likely to be a member of a flavor octet.


title:
The possible test of the calculations of nuclear matrix elements of the
  $(\beta \beta)_{0\nu}$-decay

abstract:
  The existing calculations of the nuclear matrix elements of the neutrinoless
double $\beta$-decay differ by about a factor three. This uncertainty prevents
quantitative interpretation of the results of experiments searching for this
process. We suggest here that the observation of the neutrinoless double
$\beta$-decay of {\em several} nuclei could allow to test calculations of the
nuclear matrix elements through the comparison of the ratios of the calculated
lifetimes with experimental data. It is shown that the ratio of the lifetimes
is very sensitive to different models.


title: The MSSM without mu term

abstract:
  We propose a supersymmetric extension of the standard model which does not
have a ``mu'' supersymmetric Higgs mass parameter. The matter content of the
MSSM is extended with three additional chiral superfields: one singlet, an
SU(2) triplet and a color octet, and an approximate U(1)_R symmetry naturally
guarantees that tan(beta) is large, explaining the top/bottom quark mass
hierarchy. Unlike in the MSSM, there are significant upper bounds on the masses
of superpartners, including an upper bound of 114 GeV on the mass of the
lightest chargino. However the MSSM bound on the lightest Higgs mass does not
apply.


title:
Theoretical studies of exclusive rare B decays in the Standard Model and
  Supersymmetric theories

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


title: Supersymmetric Sudakov corrections

abstract:
  For superpartner masses not much heavier than the weak scale $M=M_{\rm W}$,
large logarithmic corrections of the Sudakov type arise at TeV energies. In
this paper we discuss the general structure of electroweak supersymmetric
(susy) Sudakov corrections in the framework of the infrared evolution equation
method. We discuss Yukawa sector Ward-identities which lead to the
exponentiation of the subleading (SL) logarithmic Yukawa enhanced Sudakov
corrections in both the Standard Model (SM) as well as in softly broken
supersymmetric extensions. The results are given to SL accuracy to all orders
in perturbation theory for arbitrary external lines in the ``light'' susy-mass
scenario. The susy-QCD limit for virtual corrections is presented.
Phenomenological applications regarding the precise determination of the
important parameter $\tan \beta$ through virtual corrections are discussed
which are independent of the soft susy breaking mechanism to sub-subleading
accuracy to all orders.


title: Precise predictions for slepton pair production

abstract:
  At a future linear collider, the masses and couplings of scalar leptons can
be measured with high accuracy, thus requiring precise theoretical predictions
for the relevant processes. In this work, after a discussion of the expected
experimental precision, the complete one-loop corrections to smuon and
selectron pair production in the MSSM are presented and the effect of different
contributions in the result is analyzed.


title:
Derivation of Lorentz Invariance and Three Space Dimensions in Generic
  Field Theory

abstract:
  A very general quantum field theory, which is not even assumed to be Lorentz
invariant, is studied in the limit of very low energy excitations. Fermion and
Boson field theories are considered in parallel. Remarkably, in both cases it
is argued that, in the free and lowest energy approximation, a relativistic
theory with just three space and one time dimension emerges for each particle
type separately. In the case of Fermion fields it is in the form of the Weyl
equation, while in the case of the Bosons it is essentially in the form of the
Maxwell equations.


title:
Naturally light invisible axion in models with large local discrete
  symmetries

abstract:
  We show that by introducing appropriate local $Z_N(N\geq13)$ symmetries in
electroweak models it is possible to implement an automatic Peccei-Quinn
symmetry keeping at the same time the axion protected against gravitational
effects. Although we consider here only an extension of the standard model and
a particular 3-3-1 model, the strategy can be used in any kind of electroweak
model. An interesting feature of this 3-3-1 model is that if: {\it i)} we add
right-handed neutrinos, {\it ii)} the conservation of the total lepton number,
and {\it iii)} a $Z_2$ symmetry, the $Z_{13}$ and the chiral Peccei-Quinn
$U(1)_{\rm PQ}$ are both accidental symmetries in the sense that they are not
imposed on the Lagrangian but they are just the consequence of the particle
content of the model, its gauge invariance, renormalizability and Lorentz
invariance. In addition, this model has no domain wall problem.


title: Sfermion Precision Measurements at a Linear Collider

abstract:
  At future e+- e- linear colliders, the event rates and clean signals of
scalar fermion production - in particular for the scalar leptons - allow very
precise measurements of their masses and couplings and the determination of
their quantum numbers. Various methods are proposed for extracting these
parameters from the data at the sfermion thresholds and in the continuum. At
the same time, NLO radiative corrections and non-zero width effects have been
calculated in order to match the experimental accuracy. The substantial mixing
expected for the third generation sfermions opens up additional opportunities.
Techniques are presented for determining potential CP-violating phases and for
extracting tan(beta) from the stau sector, in particular at high values. The
consequences of possible large mass differences in the stop and sbottom system
are explored in dedicated analyses.


title: Discriminating between models for the dark energy

abstract:
  Recent measurements suggest our universe has a substantial dark energy
component, which is usually interpreted in terms of a cosmological constant.
Here we examine how much the form of this dark energy can be modified while
still retaining an acceptable fit to the high redshift supernova data. We first
consider changes in the dark energy equation of state and then explore a model
in which the dark energy is interpreted as a fluid with a bulk viscosity.


title: Initial-State Interactions in the Unpolarized Drell-Yan Process

abstract:
  We show that initial-state interactions contribute to the $\cos 2 \phi$
distribution in unpolarized Drell-Yan lepton pair production $p p$ and $ p \bar
p \to \ell^+ \ell^- X$, without suppression. The asymmetry is expressed as a
product of chiral-odd distributions $h_1^\perp(x_1,\bm{p}_\perp^2)\times \bar
h_1^\perp(x_2,\bm{k}_\perp^2) $, where the quark-transversity function
$h_1^\perp(x,\bm{p}_\perp^2)$ is the transverse momentum dependent, light-cone
momentum distribution of transversely polarized quarks in an {\it unpolarized}
proton. We compute this (naive) $T$-odd and chiral-odd distribution function
and the resulting $\cos 2 \phi$ asymmetry explicitly in a quark-scalar diquark
model for the proton with initial-state gluon interaction. In this model the
function $h_1^\perp(x,\bm{p}_\perp^2)$ equals the $T$-odd (chiral-even) Sivers
effect function $f^\perp_{1T}(x,\bm{p}_\perp^2)$. This suggests that the
single-spin asymmetries in the SIDIS and the Drell-Yan process are closely
related to the $\cos 2 \phi$ asymmetry of the unpolarized Drell-Yan process,
since all can arise from the same underlying mechanism. This provides new
insight regarding the role of quark and gluon orbital angular momentum as well
as that of initial- and final-state gluon exchange interactions in hard QCD
processes.


title:
Reactor Measurement of $\theta_{13}$ and Its Complementarity to
  Long-Baseline Experiments

abstract:
  A possibility to measure $\sin^22\theta_{13}$ using reactor neutrinos is
examined in detail. It is shown that the sensitivity $\sin^22\theta_{13}>0.02$
can be reached with 20 ton-year data by placing identical CHOOZ-like detectors
at near and far distances from a giant nuclear power plant whose total thermal
energy is 24.3 ${\text{GW}_{\text{th}}}$. It is emphasized that this
measurement is free from the parameter degeneracies which occur in accelerator
appearance experiments, and therefore the reactor measurement plays a role
complementary to accelerator experiments. It is also shown that the reactor
measurement may be able to resolve the degeneracy in $\theta_{23}$ if
$\sin^22\theta_{13}$ and $\cos^22\theta_{23}$ are relatively large.


title: Longitudinal virtual photons and the interference terms in ep collisions

abstract:
  The importance of the contributions of the longitudinally polarized virtual
photon in ep collisions is investigated. We derive the factorization formulae
for the unpolarized inclusive and semi-inclusive ep collisions in an arbitrary
reference frame. The numerical calculations for the prompt photons production
in the unpolarized Compton process (e p --> e gamma X) at the ep HERA collider
are performed in the Born approximation. We studied various distributions in
the ep centre-of-mass frame and found that the differential cross section for
the longitudinally polarized intermediate photon and the term due to the
interference between the longitudinal- and transverse- polarization states of
the photon are small, i.e. below 10% of the cross section. Moreover, these two
contributions almost cancel one another, leading to a stronger domination of
the transversely polarized virtual photon, even for its large virtuality.
Relevance of the resolved longitudinal photon in a jet production in DIS events
at HERA is commented. A relatively large (about 30%) effect due to the
longitudinal-transverse interference term was found in the azimuthal-angle
distribution in the Breit frame.


title: Global Fits of Parton distributions

abstract:
  I discuss recent developments in the determination of parton distributions
from global fits. I concentrate on the errors associated with these parton
distributions and with the physical quantities which are determined in terms of
them. I outline the various techniques used to quantify the uncertainties due
to errors on experimental data used in the fits, and provide a number of
examples of predictions with their uncertainties. However, I demonstrate that
this source of errors may, in some circumstances, be less important than errors
due to underlying assumptions in the fitting procedure and due to the
incomplete nature of the theoretical framework currently employed.