title: What exactly is a parton density?

abstract:
  I give an account of the definitions of parton densities, both the
conventional ones, integrated over parton transverse momentum, and unintegrated
transverse-momentum-dependent densities. The aim is to get a precise and
correct definition of a parton density as the target expectation value of a
suitable quantum mechanical operator, so that a clear connection to
non-perturbative QCD is provided. Starting from the intuitive ideas in the
parton model that predate QCD, we will see how the simplest operator
definitions suffer from divergences. Corrections to the definition are needed
to eliminate the divergences. An improved definition of unintegrated parton
densities is proposed.


title:
Discriminating graviton exchange effects from other new physics
  scenarios in e^+e^- collisions

abstract:
  We study the possibility of uniquely identifying the effects of graviton
exchange from other new physics in high energy e^+e^- annihilation into
fermion-pairs. For this purpose, we use as basic observable a specific
asymmetry among integrated differential distributions, that seems particularly
suitable to directly test for such gravitational effects in the data analysis.


title: Lopsided Mass Matrices and Leptogenesis in SO(10) GUT

abstract:
  Lopsided structure in mass matrices of down quarks and leptons gives a simple
explanation for the observed large angles of neutrino mixings. We realize such
mass matrices by the Froggatt-Nielsen mechanism in the framework of
supersymmetric SO(10) grand unified theory (GUT). It is shown that the model
can reproduce the successful mass matrices which have been obtained in SU(5)
models. Cosmological implication of the model is also discussed. We show that
the hybrid inflation occurs naturally in the model and it offers non-thermal
leptogenesis by decays of the next-to-lightest right-handed neutrinos. The
present baryon asymmetry is explained by just the oscillation mass scale in the
atmospheric neutrinos.


title:
Spin alignment of the high $p_T$ vector mesons in polarized pp
  collisions at high energies

abstract:
  Using the same method as that used in $e^+e^-$ annihilation and
lepton-nucleon deep-inelastic scattering, we calculate the spin alignment of
vector mesons with high transverse momenta in high energy $pp$ collisions with
one longitudinally polarized beam. We present the results obtained at RHIC
energies. We also study the spin alignment of such vector mesons in the case of
a transversely polarized proton beam and present its relation to the
transversity distribution in the nucleon. Numerical results obtained using
simple models for the transversity distributions are also given. These results
show that there exist significant spin alignment in both cases, and they can be
measured in experiments such as those at RHIC.


title: Cosmic String from D-term Inflation and Curvaton

abstract:
  We study effects of the cosmic string in the D-term inflation model on the
cosmic microwave background (CMB) anisotropy. In the D-term inflation model,
gauged cosmic string is usually formed, which may significantly affect the CMB
anisotropy. We see that its study imposes important constraint. In order to
realize the minimal model of D-term inflation, we see that the coupling
constant \lambda in the superpotential generating the inflaton potential should
be significantly small, \lambda \lesssim O(10^{-4}-10^{-5}). We also discuss
that a consistent scenario of the D-term inflation with \lambda \sim 1 can be
constructed by adopting the curvaton mechanism where the cosmic density
fluctuations are generated by a primordial fluctuation of a late-decaying
scalar field other than the inflaton.


title: Successful Modular Cosmology

abstract:
  We present a modular cosmology scenario where the difficulties encountered in
conventional modular cosmology are solved in a self-consistent manner, with
definite predictions to be tested by observation. Notably, the difficulty of
the dilaton finding its way to a precarious weak coupling minimum is made
irrelevant by having eternal modular inflation at the vacuum supersymmetry
breaking scale after the dilaton is stabilised. Neither this eternal inflation
nor the subsequent non-slow-roll modular inflation destabilise the dilaton from
its precarious minimum due to the low energy scale of the inflation and
consequent small back reaction on the dilaton potential. The observed flat CMB
spectrum is obtained from fluctuations in the angular component of a modulus
near a symmetric point, which are hugely magnified by the roll down of the
modulus to Planckian values, allowing them to dominate the final curvature
perturbation. We also give precise calculations of the spectral index and its
running.


title:
On signals of new physics in global event properties in pp collisions in
  the TeV energy domain

abstract:
  In the framework of the weighted superposition mechanism of different classes
of minimum bias events (or substructures), described by the negative binomial
multiplicity distribution, in possible scenarios for pp collisions in the TeV
energy domain, we explore global properties of an eventual new class of events,
characterised by high hadron and clan densities, to be added to the soft
(without minijets) and semihard (with minijets) ones. It turns out that the
main signal of the mentioned new physical expectations at 14 TeV c.m. energy
would be an ``elbow structure'' in the tail of the total charged particle
multiplicity distribution in complete disagreement with the second shoulder
structure predicted by Pythia Monte Carlo calculations: a challenging problem
for new experimental work.


title:
From unintegrated gluon distributions to particle production in
  nucleon-nucleon collisions at RHIC energies

abstract:
  The inclusive distributions of gluons and pions are calculated with absolute
normalization for high-energy nucleon-nucleon collisions. The results for
several unintegrated gluon distributions from the literature are compared. The
gluon distribution proposed recently by Kharzeev and Levin based on the idea of
gluon saturation is tested against DIS data from HERA. We find huge differences
in both rapidity and transverse momentum distributions of gluons and pions in
nucleon-nucleon collisions for different models of unintegrated gluon
distributions. The approximations used recently in the literature are
discussed. The Karzeev-Levin gluon distribution gives extremely good
description of momentum distribution of charged hadrons at midrapidities.
Contrary to a recent claim in the literature, we find that the gluonic
mechanism discussed does not describe the inclusive spectra of charged
particles in the fragmentation region, i.e. in the region of large $|y|$ for
any unintegrated gluon distribution from the literature.


title: Neutrino Bilarge Mixing and Flavor Physics in the Flipped SU(5) Model

abstract:
  We have constructed a specific supersymmetric flipped SU(5) GUT model in
which bilarge neutrino mixing is incorporated. Because the up-type and
down-type quarks in the model are flipped in the representations ten and five
with respect to the usual SU(5), the radiatively generated flavor mixing in
squark mass matrices due to the large neutrino mixing has a pattern different
from those in the conventional SU(5) and SO(10) supersymmetric GUTs. This leads
to phenomenological consequences quite different from SU(5) or SO(10)
supersymmetric GUT models. That is, it has almost no impact on B physics. On
the contrary, the model has effects in top and charm physics as well as lepton
physics. In particular, it gives promising prediction on the mass difference,
$\Delta M_D$, of the $D-{\bar D}$ mixing which for some ranges of the parameter
space with large $\tan\beta$ can be at the order of $10^9 ~\hbar ~s^{-1}$, one
order of magnitude smaller than the experimental upper bound. In some regions
of the parameter space $\Delta M_D$ can saturate the present bound. For these
ranges of parameter space, $t \to u,c+h^0$ can reach $10^{-5}-10^{-6}$ which
would be observed at the LHC and future $\gamma-\gamma$ colliders.


title: The Large-x Factorization of the Longitudinal Structure Function

abstract:
  A leading-twist factorization formula is derived for the longitudinal
structure function in the x -->1 limit of deeply inelastic scattering. This is
achieved by defining a new jet function which is gauge independent and probes
the transverse momentum of the struck parton in the target. In moment space,
terms of order (\ln^k N)/N, which are the leading ones for F_L, are shown to be
resummable through the cusp anomalous dimension \gamma_K and the anomalous
dimension \gamma_{J^\prime} of the new jet function. This anomalous dimension
is computed to O(\alpha_s). The suggested factorization for F_L reproduces the
fixed order results known to O(\alpha_s^2). The general ideas for resumming the
terms of order (\ln^k N)/N in moment space may be extended to the other
structure functions and to other inclusive processes near the elastic limit.


title: The CKM Matrix and the Unitarity Triangle

abstract:
  This report contains the results of the Workshop on the CKM Unitarity
Triangle, held at CERN on 13-16 February 2002 to study the determination of the
CKM matrix from the available data of K, D, and B physics. This is a coherent
document with chapters covering the determination of CKM elements from tree
level decays and K and B meson mixing and the global fits of the unitarity
triangle parameters. The impact of future measurements is also discussed.


title: Mass Relations for the Quark-Diquark Model

abstract:
  Quark model with potentials derived from QCD, including the quark-diquark
model for excited hadrons gives mass formulae in very good agreement with
experiment and goes a long way in explaining the approximate symmetries and
supersymmetries of the hadronic spectrum, including the symmetry breaking
mechanism.


title: Phenomenology and Theory of Possible Light Higgs Bosons

abstract:
  We study the implications of the absence of a direct discovery of a Higgs
boson at LEP. First we exhibit 15 physically different ways in which one or
more Higgs bosons lighter than the LEP limit could still exist. In the minimal
supersymmetric standard model (MSSM) all of these, as well as the cases where
the Higgs mass equals or exceeds 115 GeV, seem fine-tuned. We examine some
interpretations of the fine tuning in high scale theories. The least fine-tuned
MSSM outcome will have a Higgs mass at 115 GeV, while approaches that extend
the MSSM at the weak scale can naturally have larger Higgs masses.


title: Neutrino Mixings and Unified Theories

abstract:
  The recent neutrino data converge towards a 3$\nu$ scheme with two large and
one small mixing angles. Their implications for model-building are discussed.
Some possible components of a flavor symmetry over quarks and leptons are
singled out. We suggest that they can be naturally embedded in a unified
structure with a replicated gauge group.


title: Non-spectator Contributions To The Lifetime of $\Lambda_{b}$

abstract:
  In this work, we evaluate the contributions of non-spectator effects to the
lifetimes of $\Lambda_b$ and B-mesons. Based on the well-established models and
within a reasonable range of the concerned parameters, the contributions can
reduce the lifetime of $\Lambda_b$ by $7 \sim 8%$ compared to that of B-mesons
which are not significantly affected. This might partly explain the measured
ratio $\tau(\Lambda_{b})/\tau(B^{0})=0.79 $ \cite{Data}, which has been a
long-standing discrepancy between theory and experimental data.


title:
Search for `invisible' Higgs signals at LHC via Associated Production
  with Gauge Bosons

abstract:
  A light Higgs boson with substantial branching ratio into invisible channels
can occur in a variety of models with: light neutralinos, spontaneously broken
lepton number, radiatively generated neutrino masses, additional singlet
scalar(s) and/or right handed neutrinos in the extra dimensions of TeV scale
gravity. We study the observability of the WH and ZH modes at LHC with H
decaying invisibly, by carrying out a detailed simulation with two event
generators HERWIG and PYTHIA and realistic detector simulations (GETJET and
CMSJET). We find that the signal with `single lepton plus missing $E_T$'
resulting from WH production suffers from a very large background due to the
(off-shell) $W^{*}$ production via the Drell-Yan process. In contrast, the ZH
mode provides a clean signal in the `dilepton plus missing $E_T$' channel. By
exploiting this second signature, we show that invisible branching ratios of
Higgs bosons, ${BR}_{inv}$, larger than $\sim 0.42(0.70)$ can be probed at
5$\sigma$ level for $M_H = 120$(160) GeV respectively, assuming an accumulated
luminosity of L=100 fb$^{-1}$.


title: On coherent radiation in electron-positron colliders

abstract:
  The electromagnetic processes in linear colliders are discussed on the basis
of quasiclassical operator method. The complete set of expressions is written
down for spectral probability of radiation from an electron and pair creation
by a photon taking into account both electron and photon polarization. Some new
formulas are derived for radiation intensity and its asymptotics. The main
mechanisms of pair creation dominate at $\chi \leq 1$ are discussed.


title: Boiling the Vacuum with an X-Ray Free Electron Laser

abstract:
  X-ray free electron lasers will be constructed in this decade, both at SLAC
in the form of the so-called Linac Coherent Light Source as well as at DESY,
where the so-called TESLA XFEL laboratory uses techniques developed for the
design of the TeV energy superconducting electron-positron linear accelerator
TESLA. Such X-ray lasers may allow also for high-field science applications by
exploiting the possibility to focus their beams to a spot with a small radius,
hopefully in the range of the laser wavelength. Along this route one obtains
very large electric fields, much larger than those obtainable with any optical
laser of the same power. We consider here the possibility of obtaining an
electric field so high that electron-positron pairs are spontaneously produced
in vacuum (Schwinger pair production) and review the prospects to verify this
non-perturbative production mechanism for the first time in the laboratory.


title: Vector particles in Quasilocal Quark Models

abstract:
  We consider the Quasilocal Quark Model of NJL type including vector and
axial-vector four-fermion interaction with derivatives. The mass spectrum for
the ground and first excited states is obtained. The chiral symmetry
restoration sum rules in these channels are imposed as matching rules to QCD at
intermediate energies and a set of constraints on parameters of QQM is
performed.


title:
Reconstructing Neutrino Properties from Collider Experiments in a Higgs
  Triplet Neutrino Mass Model

abstract:
  We extend the minimal supersymmetric standard model with bilinear R-parity
violation to include a pair of Higgs triplet superfields. The neutral
components of the Higgs triplets develop small vacuum expectation values (VEVs)
quadratic in the bilinear R-parity breaking parameters. In this scheme the
atmospheric neutrino mass scale arises from bilinear R-parity breaking while
for reasonable values of parameters the solar neutrino mass scale is generated
from the small Higgs triplet VEVs. We calculate neutrino masses and mixing
angles in this model and show how the model can be tested at future colliders.
The branching ratios of the doubly charged triplet decays are related to the
solar neutrino angle via a simple formula.


title: Quarks and Leptons between Branes and Bulk

abstract:
  We study a supersymmetric SO(10) gauge theory in six dimensions compactified
on an orbifold. Three sequential quark-lepton families are localized at the
three fixpoints where SO(10) is broken to its three GUT subgroups. Split bulk
multiplets yield the Higgs doublets of the standard model and as additional
states lepton doublets and down-quark singlets. The physical quarks and leptons
are mixtures of brane and bulk states. The model naturally explains small quark
mixings together with large lepton mixings in the charged current. A small
hierarchy of neutrino masses is obtained due to the different down-quark and
up-quark mass hierarchies. None of the usual GUT relations between fermion
masses holds exactly.


title:
Bounds for the mass of the heaviest right-handed neutrino in SO(10)
  theories

abstract:
  By relating the Dirac neutrino mass matrix to the mass of the charged
fermions and assuming that the product of the masses of the two lightest
left-handed neutrinos is of the order of $\Delta m^2_{sol}$, we derive, within
a leptogenesis scenario, a range of values for the mass of the heaviest
right-handed neutrino, centered around the scale of $B-L$ symmetry breaking in
the SO(10) theory with Pati-Salam intermediate symmetry.


title: Scalar mesons and glueball in B-decays and gluon jets

abstract:
  We discuss the recent observation of f_0(980) in charmless B-decays and in
gluon jets which hints toward a gluonic coupling of this meson similar to eta'.
Further predictions on B-decays into scalar particles are presented. Charmless
B decays also show a broad K Kbar (and possibly pi pi) S-wave enhancement which
we relate to the 0^{++} glueball. These gluonic mesons represent a sizable
fraction of the theoretically derived decay rate for b -> sg.


title: Freezeout of resonances and nuclear fragments at RHIC

abstract:
  We quantify the conditions at which ``composites'', the resonances and bound
states $d,He^3$ are produced at RHIC. Using Hubble-like model for late stages,
one can analytically solve the rate equations and also calculate the relevant
optical depth factors. We calculate also the modification of $\rho$ masse and
width, and predict a radiacal shape change of $\sigma$.


title:
Transverse muon polarization in K+ -> mu+ nu_mu gamma: scanning over the
  Dalitz plot

abstract:
  We study the potential of the measurement of the transverse muon polarization
P_T in the K->mu nu gamma decay with the sensitivity of \delta P_T ~ 10^{-4}.
It is shown that the forthcoming experiment can measure the contribution of the
electromagnetic final state interactions to P_T that gives a possibility to
unambiguously determine the signs of the sum of the kaon form factors F_V and
F_A even without fixing their difference. We also estimate the sensitivity of
this experiment to the new physics, which could give rise to T-violation:
multi-Higgs doublet models, supersymmetric extensions of the Standard Model,
left-right symmetric model and leptoquark models.


title:
Spectrum of N=1 massive super Yang-Mills theory with fundamental matter
  in 1+1 dimensions

abstract:
  We consider N=1 supersymmetric Yang-Mills theory with fundamental matter in
the large-N_c approximation in 1+1 dimensions. We add a Chern-Simons term to
give the adjoint partons a mass and solve for the meson bound states. Here
``mesons'' are color-singlet states with two partons in the fundamental
representation. The spectrum is exactly supersymmetric, and there is complete
degeneracy between the fermion and boson bound states. We find that the mass
spectrum is composed of two distinct bands. We analyze the properties of the
bound states in each band and find a number of interesting properties of these
states. In both bands, some of the states are nearly pure quark-gluon bound
states while others are nearly pure squark-gluon bound states. The structure
functions of many of the bound states found are very strongly peaked near x=0.
The convergence of the numerical approximation appears to be very good in all
cases.


title: Generalized resummation of QCD final-state observables

abstract:
  The resummation of logarithmically-enhanced terms to all perturbative orders
is a prerequisite for many studies of QCD final-states. Until now such
resummations have always been performed by hand, for a single observable at a
time. In this letter we present a general `master' resummation formula (and
applicability conditions), suitable for a large class of observables. This
makes it possible for next-to-leading logarithmic resummations to be carried
out automatically given only a computer routine for the observable. To
illustrate the method we present the first next-to-leading logarithmic resummed
prediction for an event shape in hadronic dijet production.


title:
Nuclear shadowing and extraction of F_2p-F_2n at small x from deuteron
  collider data

abstract:
  We demonstrate that leading twist nuclear shadowing leads to large
corrections for the extraction of the neutron structure function F_2n from the
future deuteron collider data both in the inclusive and in the tagged structure
function modes. We suggest several strategies to address the extraction of F_2n
and to measure at the same time the effect of nuclear shadowing via the
measurement of the distortion of the proton spectator spectrum in the
semi-inclusive e D \to e^{\prime}pX process.


title:
Identifying Earth matter effects on supernova neutrinos at a single
  detector

abstract:
  The neutrino oscillations in Earth matter introduce modulations in the
supernova neutrino spectra. These modulations can be exploited to identify the
presence of Earth effects on the spectra, which would enable us to put a limit
on the value of the neutrino mixing angle $\theta_{13}$ and to identify whether
the mass hierarchy is normal or inverted. We demonstrate how the Earth effects
can be identified at a single detector without prior assumptions about the
flavor-dependent source spectra, using the Fourier transform of the
``inverse-energy'' spectrum of the signal. We explore the factors affecting the
efficiency of this method, and find that the energy resolution of the detector
is the most crucial one. In particular, whereas water Cherenkov detectors may
need a few ten thousand events to identify the Earth effects, a few thousand
may be enough at scintillation detectors, which generically have a much better
energy resolution. A successful identification of the Earth effects through
this method can also provide $\Delta m^2_\odot$ to a good accuracy. The
relative strength of the detected Earth effects as a function of time provides
a test for supernova models.


title: Gluon Radiation and Parton Energy Loss

abstract:
  The propagation of hard partons through spatially extended matter leads to
medium-modifications of their fragmentation pattern. Here, we review the
current status of calculations of the corresponding medium-induced gluon
radiation, and how this radiation affects hadronic observables at collider
energies.


title: Thermodynamic gauge-theory cascade

abstract:
  It is proposed that the cooling of a thermalized SU($N$) gauge theory can be
formulated in terms of a cascade involving three effective theories with
successively reduced (and spontaneously broken) gauge symmetries, SU($N$) $\to$
U(1)$^{N-1}$ $\to$ Z$_N$. The approach is based on the assumption that away
from a phase transition the bulk of the quantum interaction inherent to the
system is implicitly encoded in the (incomplete) classical dynamics of a
collective part made of low-energy condensed degrees of freedom. The properties
of (some of the) statistically fluctuating fields are determined by these
condensate(s). This leads to a quasi-particle description at tree-level. It
appears that radiative corrections, which are sizable at large gauge coupling,
do not change the tree-level picture qualitatively. The thermodynamic
self-consistency of the quasi-particle approach implies nonperturbative
evolution equations for the associated masses. The temperature dependence of
these masses, in turn, determine the evolution of the gauge coupling(s). The
hot gauge system approaches the behavior of an ideal gas of massless gluons at
asymptotically large temperature. A negative equation of state is possible at a
stage where the system is about to settle into the phase of the (spontaneously
broken) Z$_N$ symmetry.


title: Radiative Electroweak Symmetry-Breaking Revisited

abstract:
  In the absence of a tree-level scalar-field mass, renormalization-group
methods permit the explicit summation of leading-logarithm contributions to all
orders of the perturbative series within the effective potential for
$SU(2)\times U(1)$ electroweak symmetry. This improvement of the effective
potential function is seen to reduce residual dependence on the renormalization
mass scale. The all-orders summation of leading logarithm terms involving the
dominant three couplings contributing to radiative corrections is suggestive of
a potential characterized by a plausible Higgs boson mass of 216 GeV. However,
the tree potential's local minimum at $\phi =0$ is restored if QCD is
sufficiently strong.


title:
Axially symmetric multi-baryon solutions and their quantization in the
  chiral quark soliton model

abstract:
  In this paper, we study axially symmetric solutions with $B=2-5$ in the
chiral quark soliton model.In the background of axially symmetric chiral
fields, the quark eigenstates and profile functions of the chiral fields are
computed self-consistently. The resultant quark bound spectrum are doubly
degenerate due to the symmetry of the chiral field. Upon quantization, various
observable spectra of the chiral solitons are obtained. Taking account of the
Finkelstein-Rubinstein constraints, we show that our results exactly coincide
with the physical observations for B=2 and 4 while B=3 and 5 do not.


title:
Pair production in a strong slowly varying magnetic field: the effect of
  a background gravitational field

abstract:
  The production probability of an $e^--e^+$ pair in the presence of a strong,
uniform and slowly varying magnetic field is calculated by taking into account
the presence of a background gravitational field. The curvature of the
spacetime metric induced by the gravitational field not only changes the
transition probabilities calculated in the Minkowski spacetime but also primes
transitions that are strictly forbidden in absence of the gravitational field.


title: Positivity and Dense Matter

abstract:
  We elaborate on previous results concerning the positivity of the Euclidean
path integral measure for low-energy modes in dense fermionic matter. We show
that the sign problem usually associated with fermions is absent if one
considers only low-energy degrees of freedom. We describe a method for
simulating dense QCD on the lattice and give a proof using rigorous
inequalities that the color-flavor locked (CFL) phase is the true vacuum of
three flavor, massless QCD. We also discuss applications to electronic systems
in condensed matter, such as generalized Hubbard models.


title:
Some Unsettled Questions in the Problem of Neutrino Oscillations.
  Remarks About the Majorana Neutrino Oscillations

abstract:
  It is shown that we cannot put Majorana neutrinos in the standard Dirac
theory without violation of the gauge invariance. Experiments on $\nu_l \to l
(l = e, \mu, \tau)$ transitions do not confirm this supposition. It means that
on neutrino oscillation experiments, the Majorana neutrino oscillations cannot
be observed.


title: Constraining the gluon in the proton via photoproduction reactions

abstract:
  Two reactions, the photoproduction of a direct photon plus a jet and the
photoproduction of a charged hadron plus a jet, are studied in view of their
potential to constrain the gluon distribution in the proton. The results are
based on a program of partonic event generator type which includes the full set
of NLO corrections.


title: Impact of CP phases on neutrinoless double beta decay

abstract:
  We highlight in a model independent way the dependence of the effective
Majorana mass parameter, relevant for neutrinoless double beta decay, on the CP
phases of the PMNS matrix, using the most recent neutrino data including the
cosmological WMAP measurement. We perform our analysis with three active
neutrino flavours in the context of three kinds of mass spectra:
quasi-degenerate, normal hierarchical and inverted hierarchical. If a
neutrinoless double beta decay experiment records a positive signal, then
assuming that Majorana masses of light neutrinos are responsible for it, we
show how it might be possible to discriminate between the three kinds of
spectra.


title:
The Process gamma* + p -> eta_c + X: A Test for the Perturbative QCD
  Odderon

abstract:
  The rates of inclusive photo- and electroproduction of the eta_c meson:
gamma* + p -> eta_c + X are calculated in the triple Regge region, integrated
over the diffractive mass X. For the Regge exchanges we use the hard Pomeron
and Odderon, both being calculated in the framework of perturbative QCD. The
integrated cross-section depends upon the coupling of the BFKL pomeron to two
$C=-1$ odderons, and it is found to be of the order 60 pb for photoproduction
and 1.5 pb at Q^2=25 GeV^2.


title: Inflation with a running spectral index in supergravity

abstract:
  The first year Wilkinson Microwave Anisotropy Probe data favors primordial
adiabatic fluctuation with a running spectral index with $\ns >1$ on a large
scale and $\ns <1$ on a smaller scale. The model building of inflation that
predicts perturbations with such a spectrum is a challenge, because most models
predict fluctuations with either $\ns >1$ (hybrid inflation) or $\ns <1$ (new,
chaotic, or topological inflation). We give a sensible particle physics model
in supergravity that accommodates the desired running of the spectral index
using double inflation.


title: Absorption of solar radiation by solar neutrinos

abstract:
  We calculate the absorption probability of photons radiated from the surface
of the Sun by a left-handed neutrino with definite mass and a typical momentum
for which we choose |p_1|=0.2 MeV, producing a heavier right-handed
antineutrino. Considering two transitions the \nu_1 -> \nu_2 and \nu_2 -> \nu_3
we obtain two oscillation lengths L_{12}=4960.8 m, L_{23}=198.4 m, two
absorption probabilities P_{12}^{abs.}=2.5 10^{-67}, P_{23}^{abs.}=1.2 10^{-58}
and the two absorption ranges R_{12}^{abs.}=4.47 10^4 R_{\odot}=208.0 au,
R_{23}^{abs.}=0.89 10^4 R_{\odot}=41.4 au, using a neutrino mass differences of
\sqrt{|\Delta m^2_{12}|}=10 meV, \sqrt{|\Delta m^2_{23}|}=50 meV and associated
transition dipole moments. We collect all necessary theoretical ingredients,
i.e. neutrino mass and mixing scheme, induced electromagnetic transition dipole
moments, quadratic charged lepton mass asymmetries and their interdependence.


title: Gluon confinement criterion in QCD

abstract:
  We fix exactly and uniquely the infrared structure of the full gluon
propagator in QCD, not solving explicitly the corresponding dynamical equation
of motion. By construction, this structure is an infinite sum over all possible
severe (i.e., more singular than $1/q^2$) infrared singularities. It reflects
the zero momentum modes enhancement effect in the true QCD vacuum, which is due
to the self-interaction of massless gluons. It existence automatically exhibits
a characteristic mass (the so-called mass gap). It is responsible for the scale
of nonperturbative dynamics in the true QCD ground state. The theory of
distributions, complemented by the dimensional regularization method, allows
one to put the severe infrared singularities under the firm mathematical
control. By an infrared renormalization of a mass gap only, the infrared
structure of the full gluon propagator is exactly reduced to the simplest
severe infrared singularity, the famous $(q^2)^{-2}$. Thus we have exactly
established the interaction between quarks (concerning its pure gluon (i.e.,
nonlinear) contribution) up to its unimportant perturbative part. This also
makes it possible for the first time to formulate the gluon confinement
criterion and intrinsically nonperturbative phase in QCD in a manifestly
gauge-invariant ways.


title:
Neutrino CP phases and lepton electric dipole moments in supersymmetric
  theories

abstract:
  We analyse the dependence of the electron electric dipole moment (EDM) on
neutrino CP violating phases in the context of supersymmetric models. We start
by studying the supersymmetric contributions to the lepton EDM and lepton
flavour violation processes tau -> mu gamma and mu -> e gamma, in the framework
of the mass insertion approximation, showing that, due to the large neutrino
mixing, mu -> e gamma leads to severe constraints on the relevant mass
insertions. We derive model independent bounds on these mass insertions and
show that once these bounds are satisfied, the present experimental limits on
electron EDM do not constraint the neutrino phases.


title: Remarks on the decays chi_{bJ}^\prime -> omega Upsilon

abstract:
  The recently observed by CLEO cascade decays Upsilon(3S) -> gamma
chi_{bJ}^\prime -> gamma omega Upsilon are discussed. It is shown that within
the nonrelativistic description of bottomonium in the heavy b quark limit, the
ratio of the rates of the transitions chi_{bJ}^\prime -> omega Upsilon with J=1
and J=2 should be given by the ratio of the corresponding S wave phase space
factors. As a result, the rate of the observed cascade transitions through the
chi_{b2}^\prime resonance should be close to that through the chi_{b1}^\prime.
It is suggested that the ratio of the discussed cascade rates can also be
tested by measuring a simple angular correlation.


title: QCD Saturation and Photoproduction on Proton and Nuclei Targets

abstract:
  We calculate inclusive photoproduction cross-sections for both proton and
nuclei targets, using a saturation model derived from an approximate solution
to the Balitsky-Kovchegov nonlinear evolution equation. This paper extends our
hypothesis, that one can successfully use the dipole picture and saturation
models to describe soft processes, instead of the soft Pomeron Regge
parametrization. Our fit is compatible with our previous fit to DIS data, and
utilizes the same phenomenological parameters as in our paper devoted to soft
hadronic interactions. Using the Glauber formalism, and no additional
parameters, we calculate the cross-sections for photoproduction on various
nuclei, and compare our results with the relevant data.


title: Analysis of the [56,2^+] Baryon Masses in the 1/Nc Expansion

abstract:
  The mass spectrum of the positive parity [56,2^+] baryons is studied in the
1/Nc expansion up to and including O(1/Nc) effects with SU(3) symmetry breaking
implemented to first order. A total of eighteen mass relations result, several
of which are tested with the available data. The breaking of spin-flavor
symmetry is dominated by the hyperfine interactions, while spin-orbit effects
are found to be small.


title:
Two-Loop Helicity Amplitudes for Quark-Gluon Scattering in QCD and
  Gluino-Gluon Scattering in Supersymmetric Yang-Mills Theory

abstract:
  We present the two-loop QCD helicity amplitudes for quark-gluon scattering,
and for quark-antiquark annihilation into two gluons. These amplitudes are
relevant for next-to-next-to-leading order corrections to (polarized) jet
production at hadron colliders. We give the results in the `t Hooft-Veltman and
four-dimensional helicity (FDH) variants of dimensional regularization. The
transition rules for converting the amplitudes between the different variants
are much more intricate than for the previously discussed case of gluon-gluon
scattering. Summing our two-loop expressions over helicities and colors, and
converting to conventional dimensional regularization, gives results in
complete agreement with those of Anastasiou, Glover, Oleari and Tejeda-Yeomans.
We describe the amplitudes for 2 to 2 scattering in pure N=1 supersymmetric
Yang-Mills theory, obtained from the QCD amplitudes by modifying the color
representation and multiplicities, and verify supersymmetry Ward identities in
the FDH scheme.


title:
Two-loop QCD helicity amplitudes for massless quark-massless gauge boson
  scattering

abstract:
  We present the two-loop helicity amplitudes for the scattering of massless
quarks and massless gauge bosons in QCD. We use projector techniques to compute
the coefficients of the general tensor describing the two-quark two-boson
amplitude in conventional dimensional regularisation and use these coefficients
to derive the helicity amplitudes in the 't Hooft-Veltman scheme. The structure
of the infrared divergences agrees with that predicted by Catani while
expressions for the finite remainders for q qbar -> gluon gluon, q qbar ->
gluon gamma, q qbar -> gamma gamma and the processes related by crossing
symmetry are given in terms of logarithms and polylogarithms that are real in
the physical region. We have checked that the interference of tree and two-loop
helicity amplitudes, summed over helicities and colours, reproduces the
previous results for the finite remainders for interference of tree and
two-loop amplitudes given in Refs. [1,2]. We also find agreement with the
two-loop helicity amplitudes for quark-gluon scattering presented in Ref. [3].


title: Effective R-parity violation from supersymmetry breaking

abstract:
  We present a scenario in which Yukawa-like R-parity violating (RPV) couplings
are naturally suppressed. In our framework, RPV is assumed to originate from
the SUSY breaking mechanism and then transmitted into the SUSY Lagrangian only
through soft SUSY breaking operators in the scalar potential. The RPV
Yukawa-like operators of the superpotential, conventionally parametrized by the
couplings \lambda, \lambda' and \lambda'', are then generated through loops
containing the SUSY scalars, the gauginos and the soft RPV interactions and
are, therefore, manifest as effective operators with a typical strength of
order 10^{-3}.


title: The Pauli form factor of the quark induced by instantons

abstract:
  The non-perturbative contribution to the Pauli form factor of the quark,
$F_2(Q^2)$, is calculated within an instanton model for the QCD vacuum. It is
shown that the instantons give a large negative contribution to the form
factor.


title:
Double parton distributions in the leading logarithm approximation of
  perturbative QCD

abstract:
  Recent CDF measurements of the inclusive cross section for a double parton
scattering attach a great importance to any theoretical calculations of
two-particle distribution functions. Using a parton interpretation of the
leading logarithm diagrams of perturbative QCD theory, generalized
Lipatov-Altarelli-Parisi-Dokshitzer equations for the two-parton distributions
are re-obtained. The solutions of these equations are not at all the product of
two single-parton distributions what is usually applied to the current analysis
as ansatz.


title: How to parameterize a light and broad resonance (the $\sigma$ meson)

abstract:
  We point out that a commonly used parameterization form to describe the
$\sigma$ resonance is problematic by introducing a spurious singularity below
two particle threshold, on the second sheet. The spurious singularity violates
chiral symmetry and leads to sizable contribution when the resonance is light
and broad -- as what happens to the $\sigma$ resonance, hence must be removed.


title: Comparison of Microcanonical and Canonical Hadronization

abstract:
  Average multiplicities and transverse momenta of hadrons are calculated using
a microcanonical hadronization description for a cluster of given total energy
and volume. As a function of the total energy, we determine the critical volume
above which the microcanonical description coincides with the canonical one,
and compare the results with those obtained using one of standard canonical
models. We show that the critical volume depends on the energy and the mass of
the hadrons. For heavy particles, volumes above $50 fm^{3}$ are needed, even
more than$100 fm^{3}$ if one considers transverse momenta. Thus the prediction
of heavy hadron multiplicities in pp, Kp, and $e^{+}e^{-}$ reactions requires a
microcanonical approach, whereas for heavy ion reactions a canonical
calculation is valid. We conclude by showing the importance of the feeding for
the observed hadron multiplicities.


title:
Reliability of a high energy one-loop expansion of e+e- --> W+W- in the
  SM and in the MSSM

abstract:
  We compare the logarithmic Sudakov expansions of the process e+e- --> W+W- in
the one-loop approximation and in the resummed version, to subleading order
accuracy, in the SM case and in a light SUSY scenario for the MSSM. We show
that the two expansions are essentially identical below 1 TeV, but differ
drastically at higher (2,3 TeV) center of mass energies. Starting from these
conclusions, we argue that a complete one-loop calculation in the energy region
below 1 TeV does not seem to need extra two-loop corrections, in spite of the
relatively large size of the one-loop effects.


title: Testing the statistical compatibility of independent data sets

abstract:
  We discuss a goodness-of-fit method which tests the compatibility between
statistically independent data sets. The method gives sensible results even in
cases where the chi^2-minima of the individual data sets are very low or when
several parameters are fitted to a large number of data points. In particular,
it avoids the problem that a possible disagreement between data sets becomes
diluted by data points which are insensitive to the crucial parameters. A
formal derivation of the probability distribution function for the proposed
test statistic is given, based on standard theorems of statistics. The
application of the method is illustrated on data from neutrino oscillation
experiments, and its complementarity to the standard goodness-of-fit is
discussed.


title: The Scalar Sector and the Eta -> 3 Pi Problem

abstract:
  First, recent work on light scalar mesons, which is of possible interest in
connection with the strong coupling region of QCD is briefly discussed. Then a
very short highlighting of a paper concerned with an application to the eta ->
3 pi problem is presented.


title: I-spin, U-spin, and penguin dominance in $B \to K K \bar K$

abstract:
  Isospin and U-spin symmetries are useful approximations for studying penguin
dominance in $B$ meson decays to three kaons, $B\to KK\bar K$. We point out
certain subtleties in treating these decays in these approximations. Resulting
uncertainties are discussed in determining the CP content of the final state in
$B \to K^+K^-K_S$, and in relating the CP asymmetry in this process to the
value of $\sin 2\beta$.


title:
QCD Light-Cone Sum Rule Estimate of Charming Penguin Contributions in B
  -> pi pi

abstract:
  Employing the QCD light-cone sum rule approach we calculate the B -> pi pi
hadronic matrix element of the current-current operator with c quarks in the
penguin topology (``charming penguin''). The dominant contribution to the sum
rule is due to the c-quark loop at short distances and is of O(alpha_s) with
respect to the factorizable B -> pi pi amplitude. The effects of soft gluons
are suppressed at least by O(alpha_s m_b^{-2}). Our result indicates that
sizable nonperturbative effects generated by charming penguins at finite m_b
are absent. The same is valid for the penguin contractions of the
current-current operators with light quarks.


title:
Semiclassical Study of Baryon and Lepton Number Violation in High-Energy
  Electroweak Collisions

abstract:
  We make use of a semiclassical method for calculating the suppression
exponent for topology changing transitions in high-energy electroweak
collisions. In the Standard Model these processes are accompanied by violation
of baryon and lepton number. By using a suitable computational technique we
obtain results for s-wave scattering in a large region of initial data. Our
results show that baryon and lepton number violation remains exponentially
suppressed up to very high energies of at least 30 sphaleron masses (250 TeV).
We also conclude that the known analytic approaches inferred from low energy
expansion provide reasonably good approximations up to the sphaleron energy (8
TeV) only.


title:
Study of the colour singlet model with k_T-factorization in inclusive
  J/\psi production at CERN LEP2

abstract:
  We calculate the cross section and the transverse momentum distribution of
inclusive J/\psi production in \gamma \gamma collisions at CERN LEP2 within the
colour singlet model and the k_T-factorization approach, including both direct
and resolved photon contributions. The unintegrated gluon distribution in the
photon is determined, using the Blumlein's prescription for unintegrated gluon
distribution in a proton. We compare our theoretical predictions with
preliminary data taken by the DELPHI collaboration at LEP2. In addition, we
present our predictions for the J/\psi polarization properties.


title: QCD and dimensional deconstruction

abstract:
  Motivated by phenomenological models of hidden local symmetries and the ideas
of dimensional deconstruction and gauge/gravity duality, we consider the model
of an "open moose". Such a model has a large number K of hidden gauge groups as
well as a global chiral symmetry. In the continuum limit K->infinity the model
becomes a 4+1 dimensional theory of a gauge field propagating in a dilaton
background and an external space-time metric with two boundaries. We show that
the model reproduces several well known phenomenological and theoretical
aspects of low-energy hadron dynamics. We derive the general formulas for the
mass spectrum, the decay constants of the pion and vector mesons, and the
couplings between mesons. We then consider two simple realizations, one with a
flat metric and another with a "cosh" metric interpolating between two AdS
boundaries. For the pion form-factor, the single pole rho-meson dominance is
exact in the latter case and approximate in the former case. We discover that
an AdS/CFT-like prescription emerges in the computation of current-current
correlators. We speculate on the role of the model in the theory dual to QCD.


title: Ward Identities, B-> \rho Form Factors and |V_ub|

abstract:
  The exclusive FCNC beauty semileptonic decay B-> \rho is studied using Ward
identities in a general vector meson dominance framework, predicting vector
meson couplings involved. The long distance contributions are discussed which
results to obtain form factors and |V_ub|. A detailed comparison is given with
other approaches.


title: On the theory of quasielastic lepton-hadron scattering

abstract:
  The $F_{2}$ structure functions of the inelastic lepton-hadron scattering is
calculated in the case of non-zero intermediate gluon-quarks self-energy
$M_{gq}^{2}$ and quasielastic limit. It is shown that in the quasielastic limit
the evolution equation can been solved in case massive particles as QCD ladder
calculation results. The intermediate gluon-quarks self-energy, or polarization
mass is introduced as a parameter in two cases: 1) has not energy momentum
dependence and 2) momentum dependence case. At the case 1) of massive particles
we compare our result with Shirkov calculates (D.V.Shirkov 1999).It has been
shown (case 2.) that the proton structure function $F_{2}$ calculated at
realistic values of $M_{gq}^{2}$ in high energy limit transfer to standard QCD
ladder calculation results.


title:
Heavy quark mass determination from the quarkonium ground state energy:
  a pole mass approach

abstract:
  The heavy quark pole mass in perturbation theory suffers from a renormalon
caused, inherent uncertainty of $O(\Lambda_{\rm QCD})$. This fundamental
difficulty of determining the pole mass to an accuracy better than the inherent
uncertainty can be overcome by direct resummation of the first infrared
renormalon. We show how a properly defined pole mass as well as the $\bar {\rm
MS}$ mass for the top and bottom quarks can be determined accurately from the
$O(m\alpha_s^5)$ quarkonium ground state energy.


title: Structure of the Standard Model

abstract:
  The structure of the standard model is concisely summarized, including the
standard model Lagrangian, spontaneous symmetry breaking, the reexpression of
the Lagrangian in terms of mass eigenstates after symmetry breaking, and the
gauge interactions. The problems of the standard model are described.


title: What is coherent in neutrino oscillations

abstract:
  Simple rigorous quantum mechanics with no hand waving nor loopholes clarifies
the confusion between three contradictory descriptions of neutrino
oscillations: (1)The time oscillations shown in standard textbooks produced by
neutrino eigenstates with different masses and different energies. (2) That
time oscillations and interference between states having different energies
cannot be observed in realistic experiments. (3) That interference between
different neutrino mass eigenstates is not observable in "missing mass"
experiments where information determining the neutrino mass is available from
other particles measured in production or detection vertices.
Quantum-mechanical ignorance of the neutrino momentum is rigorously shown to be
imposed by all realistic detectors and to produce coherence between amplitudes
from neutrino states with the same energy and different masses. Conditions are
precisely formulated for the loss of coherence when mass eigenstate wave
packets moving with different velocities separate. The example of Bragg
scattering shows how quantum-mechanically imposed ignorance produces coherence.


title: The Scale on Chiral Symmetry Breaking

abstract:
  We study the relation between the scale of chiral symmetry spontaneously
breaking and constituent quark mass. We argue that this relation partly reveals
strong interaction origination of chiral symmetry breaking. We show that the
relation can be obtained via checking unitarity region of low-energy effective
field theory of QCD. This effective field theory must manifestly include
consistent quark mass as parameter. Thus we derive this effective field theory
from naive chiral constituent quark model. The phenomenological value obtained
by this method agree with usual one determined by pion decay constant.


title: An Impact Parameter Dipole Saturation Model

abstract:
  We develop a dipole model for HERA DIS data which incorporates the impact
parameter distribution of the proton. The model describes the inclusive total
$\gamma^*p$ cross-sections as well as the diffractive $J/\psi$ differential
cross-sections. We compare the model with previous approaches and show that the
$t$-distributions are sensitive to saturation phenomena. We estimate the
boundary of the saturation region and show that it dominates the data in the
low-$Q^2$ region where the total $\gamma^*p$ cross-section exhibits the same
universal rise as hadronic cross-sections. The model is then extended to nuclei
and shows good agreement with the nuclear shadowing data at small-$x$. Finally,
we estimate the saturation scale in nuclei.


title:
Lepton Flavor Violating Processes and Muon g-2 in Minimal Supersymmetric
  SO(10) Model

abstract:
  In the recently proposed minimal supersymmetric SO(10) model, the neutrino
Dirac Yukawa coupling matrix, together with all the other fermion mass
matrices, is completely determined once free parameters in the model are
appropriately fixed so as to accommodate the recent neutrino oscillation data.
Using this unambiguous neutrino Dirac Yukawa couplings, we calculate the lepton
flavor violating (LFV) processes and the muon g-2 assuming the minimal
supergravity scenario. The resultant rates of the LFV processes are found to be
large enough to well exceed the proposed future experimental bound, while the
magnitude of the muon g-2 can be within the recent result by Brookhaven E821
experiment. Furthermore, we find that there exists a parameter region which can
simultaneously realize the neutralino cold dark matter abundance consistent
with the recent WMAP data.


title: Azimuthal Asymmetries in Heavy Quark Leptoproduction as a Test of pQCD

abstract:
  We analyze the perturbative and parametric stability of the QCD predictions
for the azimuthal asymmetries in heavy quark leptoproduction. At leading order,
the $\cos \phi$ asymmetry vanishes whereas the $\cos 2\phi$ one is of leading
twist and predicted to be about 15% at energies sufficiently above the
production threshold. We calculate the NLO soft-gluon corrections to
$\phi$-dependent leptoproduction to the next-to-leading logarithmic accuracy.
The soft-gluon approximation provides a good description of the available exact
NLO results at $Q^{2}\lesssim m^{2}$. Our analysis shows that, contrary to the
production cross sections, the $\cos 2\phi$ asymmetry is practically
insensitive to soft radiation for $Q^{2}\lesssim m^{2}$ at energies of the
fixed target experiments. We conclude that the $\cos 2\phi$ asymmetry is well
defined in pQCD: it is stable both perturbatively and parametrically, and
insensitive (in the case of bottom production) to nonperturbative
contributions. Measurements of the azimuthal asymmetries would provide an
excellent test of pQCD applicability to heavy flavor production.


title: Slepton production from gauge boson fusion

abstract:
  We emphasise that charged slepton pairs produced via vector-boson fusion
along with two high-mass, high-$p_T$ forward/backward jets (in two opposite
hemispheres) can have a higher production cross-section for heavy slepton
masses than that from conventional Drell-Yan production at a hadronic collider
like the LHC. We analyse the signal and leading backgrounds in detail in the
minimal supersymmetric standard model with conserved baryon and lepton numbers.
Our investigation reveals that the mass reach of the vector-boson fusion
channel is certainly an improvement over the scope of the Drell-Yan mode.


title: $D_s$ decays into $\phi$ and $f_0(980)$ mesons

abstract:
  We consider the nonleptonic and semileptonic decays of $D_s$-mesons into
$\phi$ and $f_0(980)$ mesons. QCD sum rules are used to calculate the form
factors associated with these decays, and the correspondig decay rates. On the
basis of data on $D_s^+\to\pi^+\pi^+\pi^-$, which goes dominantly via the
transition $D_s^+\to \pi^+f_0(980)$, we conclude that there is space for a
sizeable light quark component on $f_0(980)$.


title: On The Ladder Bethe-Salpeter Equation

abstract:
  The Bethe-Salpeter (BS) equation in the ladder approximation is studied
within a scalar theory: two scalar fields (constituents) with mass $m$
interacting via an exchange of a scalar field (tieon) with mass $\mu$. The BS
equation is written in the form of an integral equation in the configuration
Euclidean $x$-space with the kernel which for stable bound states $M<2m$ is a
self-adjoint positive operator. The solution of the BS equation is formulated
as a variational problem. The nonrelativistic limit of the BS equation is
considered. The role of so-called abnormal states is discussed. The analytical
form of test functions for which the accuracy of calculations of bound state
masses is better than 1% (the comparison with available numerical calculations
is done) is determined. These test functions make it possible to calculate
analytically vertex functions describing the interaction of bound states with
constituents. As a by-product a simple solution of the Wick-Cutkosky model for
the case of massless bound states is demonstrated.


title: Phenomenology on the QCD dipole picture revisited

abstract:
  We perform an adjust to the most recent structure function data, considering
the QCD dipole picture applied to ep scattering. The structure function F2 at
small x and intermediate Q2 can be described by the model containing an
economical number of free-parameters, which encodes the hard Pomeron physics.
The longitudinal structure function and the gluon distribution are predicted
without further adjustments. The data description is effective, whereas a
resummed next-to-leading level analysis is deserved.


title:
Simulation of antiproton-nucleus interactions in the framework of the
  UrQMD model

abstract:
  This paper proposes to apply the
  Ultra-Relativistic Quantum Molecular Dynamic (UrQMD) approach to implement
the PANDA project (GSI).
  Modeling of $\bar{p}$A-interactions has been performed at antiproton energies
from 1 GeV to 200 GeV by using the UrQMD model. We have studied average
multiplicities, multiplicity distributions of various types of secondary
particles, correlations between the multiplicities, rapidity, and transverse
momentum distributions of the particles. The UrQMD model predictions on
inelastic $\bar{p}$A- collisions have been found to reproduce qualitatively the
experimental data. However, to reach the quantitative agreement, especially, in
fragmentation regions, it is needed to modify the UrQMD model.


title: Degenerate Rindler Vacuum

abstract:
  We combine the creation and annihilation operators of a scalar field in
Minkowski spacetime to obtain the generators of the SU(1,1). We show that the
transformation between Minkowski and Rindler vacua can be represented by
(pseudo)rotation in the space of the SU(1,1) group. The root of this fact
originates from the coordinate transformation between Minkowski and Rindler
manifolds that can also be represented as a (pseudo)rotation in SU(1,1) group.
The group structure reveals that an independent (pseudo)rotation in the group
space must exist which leads to a new vacuum state, independent Rindler vacuum.
The newly defined state shares many of the properties of the Rindler vacuum
and, in particular, the theorem of thermalization remains valid for it.


title: On the Top Quark's Chiral Weak-Moment

abstract:
  For the observed t --> W b decay, an intensity-ratio equivalence-theorem for
two Lorentz-invariant couplings is shown to be related to symmetries of
tWb-transformations. Three explicit tWb-transformations, A_{+}=M A_{SM}, ...
relate the four standard model's helicity amplitudes, A_{SM}, and the
amplitudes A_{+} in the case of an additional t_R --> b_L weak-moment of
relative strength Lambda_{+} =E_W /2 = 53 GeV. Two commutator plus
anti-commutator symmetry algebras are generated from M, P, B. These
transformations enable a simple and uniform characterization of the values of
Lambda_{+}, m_W/m_t, and m_b/m_t.


title: The Direct Limit on the Higgs Mass and the SM Fit

abstract:
  Because of two $3\sigma$ anomalies, the Standard Model (SM) fit of the
precision electroweak data has a poor confidence level, $CL= 0.02$. Since both
anomalies involve challenging systematic issues, it might appear that the SM
could still be valid if the anomalies resulted from underestimated systematic
error. Indeed the $CL$ of the global fit could then increase to 0.71, but that
fit predicts a small Higgs boson mass, $m_H=45$ GeV, that is inconsistent at
95% CL with the lower limit, $m_H>114$ GeV, established by direct searches. The
data then favor new physics if the anomalous measurements are both excluded or
both retained, and the Higgs boson mass cannot be predicted until the new
physics is understood. The validity of the SM could however be maintained by a
propitious combination of statistical fluctuation and systematic error. The
current data do not allow a definitive conclusion.


title: Introduction to $B$ Physics

abstract:
  A short introduction to some current topics in $B$ physics is presented in
order to set the stage for some results to be announced at this Workshop. After
briefly reviewing the Cabibbo-Kobayashi-Maskawa (CKM) matrix and information on
its parameters, the decays of neutral $B$ mesons to several CP eigenstates, and
some $B \to \pi K$ decays, are discussed. It is shown that progress is being
made on determination of all the angles of the unitarity triangle.


title:
The perspectives of decoding the nature of the a0(980) and f0(980)
  mesons and of defining the relative phase between the three-gluon and
  one-photon amplitudes in the J/psi decays

abstract:
  It is argued that the search of the J/psi --> f0(980)omega and J/psi -->
a0(980)rho decays and the more precise definition of B(J/psi --> f0(980)phi)
are the urgent purposes in the J/\psi spectroscopy.
  It is shown that the study of the omega-rho0 interference pattern in the
J/psi --> (\rho^0+\omega)eta --> pi+pi-eta decay provides evidence for the
large (nearly pi/2) relative phase between the isovector one-photon and
three-gluon decay amplitudes .


title: Explicit Quark-Hadron Duality Violations in B-Meson Decays

abstract:
  Duality is not violated at order Delta/M once j=3/2 and j=1/2+ states are
properly accounted for.


title: The W mass and the U parameter

abstract:
  The Z-pole data from e+e- colliders and results from the NuTeV experiment at
Fermilab can be brought into agreement if (1) the neutrino-Z couplings were
suppressed relative to the Standard Model (SM), and (2) the Higgs boson were
much heavier than suggested by SM global fits. However, increasing the Higgs
boson mass will move the theoretical value of the W mass away from its
experimental value. A large and positive U parameter becomes necessary to
account for the difference. We discuss what type of new physics may lead to
such values of U.


title: Effect of pion thermal width on the sigma spectrum

abstract:
  We study the effect of thermal width of $\pi$ on the spectral function of
$\sigma$ applying a resummation technique called optimized perturbation theory
at finite temperature ($T$) to ${\cal O}(4)$ linear sigma model. In order to
take into account finite thermal width of $\pi$, we replace the internal pion
mass in the self-energy of $\sigma$ with that of complex pole found in a
previous paper. The obtained spectral function for $T\aplg 100 {\rm MeV}$ turns
out to possess two broad peaks. Although a sharp peak at $\sigma\to\pi\pi$
threshold was observed in the one-loop calculation without pion thermal width,
the peak is proved to be smeared out. We also search for the poles of the
$\sigma$ propagator and analyze the behavior of the spectral function with
these poles.


title:
Phenomenological discussion of $B\to P V$ decays in QCD improved
  factorization approach

abstract:
  Trying a global fit of the experimental branching ratios and CP-asymmetries
of the charmless $B\to PV$ decays according to QCD factorization, we find it
impossible to reach a satisfactory agreement, the confidence level (CL) of the
best fit is smaller than .1 %. This failure reflects the difficulty to
accommodate several large experimental branching ratios of the strange
channels. Furthermore, experiment was not able to exclude a large direct CP
asymmetry in $\bar {B}^0\to\rho^+ \pi^-$, which is predicted very small by QCD
factorization. Proposing a fit with QCD factorization complemented by a
charming-penguin inspired model we reach a best fit which is not excluded by
experiment (CL of about 8 %) but is not fully convincing.
  These negative results must be tempered by the remark that some of the
experimental data used are recent and might still evolve significantly.


title:
Entropy and multifractal analysis of multiplicity distributions from pp
  simulated events up to LHC energies

abstract:
  Using three different Monte Carlo generators of high energy proton-proton
collisions (HIJING, NEXUS, and PSM) we study the energy dependence of
multiplicity distributions of charged particles including the LHC energy range.
Results are used for calculation of the information entropy, Renyi's dimensions
and other multifractal characteristics of particle production.


title: Quasi-Degenerate Neutrino Masses in Terms of Mass-Squared Differences

abstract:
  The absolute neutrino masses are obtained in terms of the atmospheric and
solar mass-squared differences within the framework of low energy phenomenology
by suggestion of a quantitative analogy between the hierarchies of the neutrino
and charged lepton mass ratios. It points to a quasi-degenerate three neutrino
mass pattern with the neutrino mass scale likely located in the range 0.1 --
0.3 eV, and best-fit value m = 0.18 -- 0.20 eV. Restrictions on the neutrino
mass scale from the WMAP data are considered. Possible indirect evidence in
favor of quasi-degenerate neutrino masses is noted.


title:
Instanton and Higher-Loop Perturbative Contributions to the QCD Sum-Rule
  Analysis of Pseudoscalar Gluonium

abstract:
  Instanton effects and three-loop perturbative contributions are incorporated
into QCD sum-rule analyses of pseudoscalar ($J^{PC}=0^{-+}$) gluonium. Gaussian
sum-rules are shown to be superior to Laplace sum-rules in optimized
predictions for pseudoscalar gluonium states in the presence of instanton
contributions. The Gaussian sum-rule analysis yields a pseudoscalar mass of
$(2.65\pm 0.33) GeV$ and width bounded by $\Gamma<530 MeV$. The Laplace
sum-rules provide corroborating evidence in support of the $\approx 2.7 GeV$
mass scale.


title: Screening and antiscreening in anisotropic QED and QCD plasmas

abstract:
  We use a transport-theory approach to construct the static propagator of a
gauge boson in a plasma with a general axially- and reflection-symmetric
momentum distribution. Non-zero magnetic screening is found if the distribution
is anisotropic, confirming the results of a closed-time-path-integral approach.
We find that the electric and magnetic screening effects depend on both the
orientation of the momentum carried by the boson and the orientation of its
polarization. In some orientations there can be antiscreening, reflecting the
instabilities of such a medium. We present some fairly general conditions on
the dependence of these effects on the anisotropy.


title: Isospin Dependence of Power Corrections in Deep Inelastic Scattering

abstract:
  We present results of a perturbative QCD analysis of deep inelastic
measurements of both the deuteron and proton structure functions. We evaluate
the theoretical uncertainty associated to nuclear effects in the deuteron, and
we extract simultaneously the isospin depedendence of: i)the higher twists
terms; ii) the ratio of the longitudinal to transverse cross sections; iii) the
ratio of the neutron to proton structure functions. The extraction of the
latter, in particular, has been at the center of an intense debate. Its
accurate determination is crucial both theoretically and for the interpretation
of the more precise neutrino experiments including the newly planned high
intensity 50 GeV proton synchrotron.


title: QCD Results from the CDF Experiment at sqrt{s}=1.96 TeV

abstract:
  First QCD results obtained from the CDF experiment using Run II data are
reported. The Run II physics program at the Tevatron started in the spring of
2001, with protons and anti-protons colliding at an energy of sqrt(s) = 1.96
TeV. The size of the data sample already compares to that of Run I. Results
presented here include the measurement of the inclusive jet cross section, a
search for new particles decaying to dijets, and a study of diffractive dijet
events.


title:
Probing the mechanism of EWSB with a rho parameter defined in terms of
  Higgs couplings

abstract:
  A definition of the rho parameter based on the Higgs couplings with the gauge
bosons, rho_h= g_{hWW}}/c^2_W g_{hZZ}, is proposed as a new probe into the
origin of the mechanism of electroweak symmetry breaking. While $\rho_h=1$
holds in the SM, deviations from one are predicted in models with extended
Higgs sector.
  We derive a general expresion of rho_h for a model with arbitrary Higgs
multiplets, and discuss its size within the context of specific models with
Higgs triplets, including the ``Little Higgs'' models recently proposed. We
find the even for Higgs models that incorporate the custodial symmetry to make
rho=1, one could have rho_h\neq 1, which could be tested at the level of a few
percent, with the precision Higgs meassurements expected at the NLC.


title: Do Ordinary Nuclei Contain Exotic States of Matter?

abstract:
  The strongly repulsive core of the short-range nucleon-nucleon interaction
leads to the existence of high-momentum nucleons in nuclei. Inclusive electron
scattering can be used to probe these high-momentum nucleons and study the
nature of the corresponding short-range correlations in nuclei. With recent
data from Jefferson Lab we have begun to map out the strength of two-nucleon
correlations in nuclei, while upcoming experiments should allow us to isolate
the presence of multi-nucleon correlations. In addition to their importance in
describing nuclear structure, these configurations of correlated nucleons
represent high density 'droplets' of hadronic matter. As the density of
hadronic matter increases there should be a weakening of quark confinement,
similar to the onset of deconfinement expected at extremely high temperatures.
While there have been hints of non-hadronic structure in nuclei, future
measurements will allow us to directly probe the quark distributions of high
density configurations in nuclei. A modified quark structure in these closely
packed nucleons would provide a clear signature of exotic components to the
structure of nuclei.


title:
A Detailed Study of the Gluino Decay into the Third Generation Squarks
  at the CERN LHC

abstract:
  In supersymmetric models a gluino can decay into tb\tilde{\chi}^{\pm}_1
through a stop or a sbottom. The decay chain produces an edge structure in the
m_{tb} distribution. Monte Carlo simulation studies show that the end point and
the edge height would be measured at the CERN LHC by using a sideband
subtraction technique. The stop and sbottom masses as well as their decay
branching ratios are constrained by the measurement. We study interpretations
of the measurement in the minimal supergravity model. We also study the gluino
decay into tb and \tilde{\chi}^{\pm}_2 as well as the influence of the stop
left-right mixing on the m_{bb} distribution of the tagged $tb$ events.


title: $A^b_{FB}$ and $R_b$ at LEP and New Right-Handed Gauge Bosons

abstract:
  We explore models with additional right-handed gauge bosons that couple
predominantly to the third generation in the context of $b\bar{b}$ production
at LEP. In particular we investigate potential new contributions to $\delta
g_{Rb}$ that are needed if the measured $A^b_{FB}$ at the $Z$ peak is
interpreted as a signal of new physics. We identify two sources of large
$\delta g_{Rb}$ corrections: $Z-Z^\prime$ mixing at tree-level, and one-loop
effects from a new $SU_R(2)$ triplet of gauge bosons. We find that the latter
can contribute to $\delta g_{Rb}$ at the 1%-level. We place bounds on the mass
of the additional $Z^\prime$ gauge boson that occurs in these models using the
$R_b$ measurements from LEP-II. We find that even in cases where the $Z^\prime$
couples almost exclusively to the $b$ and $t$-quarks, masses lighter than about
500 GeV are already excluded.


title:
Neutrino lensing and modification of Newtonian gravity at large
  distances

abstract:
  The nature of the modification to neutrino lensing from galaxies, as caused
by possible modifications to Newtonian gravity at large distances, is studied.


title: k_T factorization of exclusive B decays

abstract:
  I compare collinear and $k_T$ factorization theorems in perturbative QCD, and
discuss their application to exclusive $B$ meson decays. Especially, I
concentrate on the recently measured time-dependent CP asymmetry of the
$B^0_d\to\pi^+\pi^-$ modes, from which the unitarity angle can be extracted.


title:
Onset of Perturbative Color Opacity at Small x and Upsilon Coherent
  Photoproduction off heavy nuclei at LHC

abstract:
  We study photon-induced coherent production of Upsilon in ultraperipheral
heavy ion collisions at LHC and demonstrate that the counting rates will be
sufficient to measure nuclear shadowing of generalized gluon distributions.
This will establish the transition from the regime of color transparency to the
regime of perturbative color opacity in an unambiguous way. We argue that such
measurements will provide the possibility to investigate the interaction of
ultra-small color dipoles with nuclei in QCD at large energies, which are
beyond the reach of the electron-nucleon (nucleus) colliders, and will
unambiguously discriminate between the leading twist and higher twist scenarios
of gluon nuclear shadowing.


title: Evidence for Instanton-Induced Dynamics, from Lattice QCD

abstract:
  We perform a study of the non-perturbative dynamics of the light-quark sector
of QCD, based on some recent results of lattice simulations with chiral
fermions. We analyze some correlators that are designed to probe the Dirac
structure of the quark-quark interaction at different scales. We show that, in
the non-perturbative regime, such an interaction contains very large scalar and
pseudo-scalar components. We observe quantitative agreement between lattice QCD
results and the predictions of the Instanton Liquid Model (ILM). Moreover, we
study how the the quark-quark interaction is modified, when quark loops are
suppressed. We observe a dramatic effect related to the loss of unitarity,
which is naturally explained in the instanton picture. Such an effect cannot be
explained in a Dyson-Schwinger Equations (DSE) approach, if one assumes a
simple vector quark-gluon coupling. Therefore, from the present study it
emerges that DSE models with such an ansatz for the vertex function are not
consistent with QCD.


title: Electroweak symmetry breaking and fermion masses from extra dimensions

abstract:
  We study higher-dimensional non-supersymmetric orbifold models where the
Higgs field is identified with some internal component of a gauge field. We
address two important and related issues that constitute severe obstacles
towards model building within this type of constructions: the possibilities of
achieving satisfactory Yukawa couplings and Higgs potentials. We consider
models where matter fermions are localized at the orbifold fixed-points and
couple to additional heavy fermions in the bulk. When integrated out, the
latter induce tree-level non-local Yukawa interactions and a quantum
contribution to the Higgs potential that we explicitly evaluate and analyse.
The general features of these highly constrained models are illustrated through
a minimal but potentially realistic five-dimensional example. Finally, we
discuss possible cures for the persisting difficulties in achieving acceptable
top and Higgs masses. In particular, we consider in some detail the effects
induced in these models by adding localized kinetic terms for gauge fields.


title: Oscillations do not distinguish between massive and tachyonic neutrinos

abstract:
  It is shown that the hypothesis of tachyonic neutrinos leads to the same
oscillations effect as if they were usual massive particles. Therefore, the
experimental evidence of neutrino oscillations does not distinguish between
massive and tachyonic neutrinos.


title: QCD Short-distance Constraints and Hadronic Approximations

abstract:
  This paper discusses a general class of ladder resummation inspired hadronic
approximations. It is found that this approach naturally reproduces many
successes of single meson per channel saturation models (e.g. VMD) and NJL
based models. In particular the existence of a constituent quark mass and a gap
equation follows naturally. We construct an approximation that satisfies a
large set of QCD short-distance and large $N_c$ constraints and reproduces many
hadronic observables.
  We show how there exists in general a problem between QCD short-distance
constraints for Green Functions and those for form factors and cross-sections
following from the quark-counting rule. This problem while expected for Green
functions that do not vanish in purely perturbative QCD also persists for many
Green functions that are order parameters.


title: Spin Polarization and Color Superconductivity in Quark Matter

abstract:
  A coexistent phase of spin polarization and color superconductivity in
high-density QCD is investigated using a self-consistent mean-field method at
zero temperature. The axial-vector current stemming from the Fock exchange term
of the one-gluon-exchange interaction has a central role to cause spin
polarization. The magnitude of spin polarization is determined by the coupled
Schwinger-Dyson equation with a superconducting gap function. As a significant
feature the Fermi surface is deformed by the axial-vector self-energy and then
rotational symmetry is spontaneously broken. The gap function is also taken to
be anisotropic in accordance with the deformation. As a result of numerical
calculation, it is found that spin polarization barely conflicts with color
superconductivity, but almost coexists with it.


title: On the Glue Content in Heavy Quarkonia

abstract:
  Starting with two coupled Bethe-Salpeter equations for the quark-antiquark,
and for the quark-glue-antiquark component of the quarkonium, we solve the
bound state equations perturbatively. The resulting admixture of glue can be
partially understood in a semiclassical way, one has, however, to take care of
the different use of time ordered versus retarded Green functions. Subtle
questions concerning the precise definition of the equal time wave function
arise, because the wave function for the Coulomb gluon is discontinuous with
respect to the relative time of the gluon. A striking feature is that a one
loop non abelian graph contributes to the same order as tree graphs, because
the couplings of transverse gluons in the tree graphs are suppressed in the non
relativistic bound state, while the higher order loop graph can couple to
quarks via non suppressed Coulomb gluons. We also calculate the amplitude for
quark and antiquark at zero distance in the quark-glue-antiquark component of
the P-state. This quantity is of importance for annihilation decays of
P-states. It shows a remarkable compensation between the tree graph and the non
abelian loop graph contribution. An extension of our results to include non
perturbative effects is possible.


title: The "proton spin crisis" - a quantum query

abstract:
  The "proton spin crisis" was introduced in the late 1980s, when the
EMC-experiment revealed that little or nothing of a proton's spin seemed to be
carried by its quarks. The main objective of this paper is to point out that it
is wrong to assume that the proton spin, measured by completely different
experimental setups, should be the same in all circumstances.


title: m_T2 : the truth behind the glamour

abstract:
  We present the kinematic variable, m_T2, which is in some ways similar to the
more familiar `transverse-mass', but which can be used in events where two or
more particles have escaped detection. We define this variable and describe the
event topologies to which it applies, then present some of its mathematical
properties. We then briefly discuss two case studies which show how m_T2 is
vital when reconstructing the masses of supersymmetric particles in mSUGRA-like
and AMSB-like scenarios at the Large Hadron Collider.


title: Hyperfine splitting and leptonic decay rates in heavy quarkonia

abstract:
  The hyperfine splitting in heavy quarkonia is considered in its relation to
the leptonic decay rates with the account of relativistic and radiative
corrections. The calculated decay rates agree well with the available
experimental data, while the predicted \eta_c(2S) mass is significantly smaller
than the value measured recently by the Belle Collaboration.


title: Model for Gravitational Interaction between Dark Matter and Baryons

abstract:
  We propose a phenomenological model where the gravitational interaction
between dark matter and baryons is suppressed on small, subgalactic scales. We
describe the gravitational force by adding a Yukawa contribution to the
standard Newtonian potential and show that this interaction scheme is
effectively suggested by the available observations of the inner rotation
curves of small mass galaxies. Besides helping in interpreting the cuspy
profile of dark matter halos observed in N-body simulations, this potential
regulates the quantity of baryons within halos of different masses.


title: Supersymmetric Flavor Models and the B --> phi K_S Anomaly

abstract:
  We consider the flavor structure of supersymmetric theories that can account
for the deviation of the observed time-dependent CP asymmetry in B --> phi K_S
from the standard model prediction. Assuming simple flavor symmetries and
effective field theory, we investigate possible correlations between sizable
supersymmetric contributions to b --> s transitions and to flavor changing
processes that are more tightly constrained. With relatively few assumptions,
we determine the properties of minimal Yukawa and soft mass textures that are
compatible with the desired supersymmetric flavor-changing effect and
constraints. We then present explicit models that are designed (at least
approximately) to realize these textures. In particular, we present an Abelian
model based on a single U(1) factor and a non-trivial extra-dimensional
topography that can explain the CP asymmetry in B --> phi K_S, while
suppressing other supersymmetric flavor changing effects through a high degree
of squark-quark alignment.


title: Probing New Physics via an Angular Analysis of B --> V1 V2 decays

abstract:
  We show that an angular analysis of B --> V1 V2 decays yields numerous tests
for new physics in the decay amplitudes. Unlike direct CP asymmetries, many of
these new-physics observables are nonzero even if the strong phase differences
vanish. For certain observables, neither time-dependent measurements nor
tagging is necessary. Should a signal for new physics be found, one can place a
lower limit on the size of the new-physics parameters, as well as on their
effect on the measurement of the phase of B0--Bbar0 mixing.


title: Using pi_2(1670) -> b_1(1235) pi to Constrain Hadronic Models

abstract:
  We show that current analyses of experimental data indicate that the strong
decay mode pi_2 -> b_1 pi is anomalously small. Non-relativistic quark models
with spin-1 quark pair creation, such as ^3P_0, ^3S_1 and ^3D_1 models, as well
as instanton and lowest order one-boson (in this case pi) emission models, can
accommodate the analyses of experimental data, because of a quark-spin
selection rule. Models and effects that violate this selection rule, such as
higher order one-boson emission models, as well as mixing with other Fock
states, may be constrained by the small pi_2 -> b_1 pi decay. This can provide
a viability check on newly proposed decay mechanisms. We show that for mesons
made up of a heavy quark and anti-quark, the selection rule is exact to all
orders of Quantum Chromodynamics (QCD) perturbation theory.


title:
Probing neutrino mass with multilepton production at the Tevatron in the
  simplest R-parity violation model

abstract:
  We analyze the production of multileptons in the simplest supergravity model
with bilinear violation of R parity at the Fermilab Tevatron. Despite the small
R-parity violating couplings needed to generate the neutrino masses indicated
by current atmospheric neutrino data, the lightest supersymmetric particle is
unstable and can decay inside the detector. This leads to a phenomenology quite
distinct from that of the R-parity conserving scenario. We quantify by how much
the supersymmetric multilepton signals differ from the R-parity conserving
expectations, displaying our results in the $m_0 \otimes m_{1/2}$ plane. We
show that the presence of bilinear R-parity violating interactions enhances the
supersymmetric multilepton signals over most of the parameter space, specially
at moderate and large $m_0$.


title:
Non-perturbative Propagators, Running Coupling and Dynamical Mass
  Generation in Ghost-Antighost Symmetric Gauges in QCD

abstract:
  We present approximate non-perturbative solutions for the propagators as well
as the running coupling of QCD from a coupled system of renormalised, truncated
Dyson--Schwinger equations. We employ ansaetze for the dressed vertices such
that the running coupling and the quark mass function are independent of the
renormalisation point. Our solutions are in good agreement with the results of
recent lattice calculations.
  We find a weakly vanishing gluon propagator at small momenta and an infrared
singular ghost propagator in agreement with Zwanziger's horizon condition and
the Kugo-Ojima confinement criterion. The running coupling possesses an
infrared fixed point at alpha(0) = 8.92/N_c. To investigate the influence of
boundary conditions on the propagators we solved the ghost and gluon DSEs also
on a four-torus. Our results show typical finite volume effects but are still
close to the continuum solutions for sufficiently large volumes.
  For the quark propagator we find dynamically generated quark masses that
agree well with phenomenological values. The effects of unquenching the system
are found to be small. In particular the infrared behaviour of the ghost and
gluon dressing functions found in pure Yang-Mills theory is almost unchanged as
long as the number of light flavors is smaller than four.


title: Lepton Mass Matrices with Four Texture Zeros

abstract:
  We propose two ans$\rm\ddot{a}$tze of lepton mass matrices with four texture
zeros, and confront them with current experimental data on neutrino
oscillations. The parameter space of each ansatz is carefully explored. We find
that both ans$\rm\ddot{a}$tze can accommodate the normal hierarchy of neutrino
masses and the bi-large pattern of lepton flavor mixing. Their predictions for
the effective mass of the tritium beta decay and that of the neutrinoless
double beta decay are too small to be detectable, but leptonic CP violation at
the percent level is allowed. Some discussions are also given about the seesaw
invariance of the four-zero texture of Dirac and Majorana neutrino mass
matrices.


title: $t \to b W$ in NonCommutative Standard Model

abstract:
  We study the top quark decay to b quark and W boson in the NonCommutative
Standard Model (NCSM). The lowest contribution to the decay comes from the
terms quadratic in the matrix describing the noncommutative (NC) effects while
the linear term is seen to identically vanish because of symmetry. The NC
effects are found to be significant only for low values of the NC
characteristic scale.


title: Inflationary Attractor from Tachyonic Matter

abstract:
  We study the complete evolution of a flat and homogeneous universe dominated
by tachyonic matter. We demonstrate the attractor behaviour of the tachyonic
inflation using the Hamilton-Jacobi formalism. We else obtain analytical
approximations to the trajectories of the tachyon field in different regions.
The numerical calculation shows that an initial non-vanishing momentum does not
prevent the onset of inflation. The slow-rolling solution is an attractor.


title: Final Results on Heavy Quarks at LEP and SLD

abstract:
  In the last decade, the LEP and SLD experiments played a central role in the
study of B hadrons (hadrons containing a b quark).
  New B hadrons have been observed ($B^0_s$, \Lambda_b$, $\Xi_b$ and $B^{**}$)
and their production and decay properties have been measured. In this paper we
will focus on measurements of the CKM matrix elements: $|V_{cb}|$, $|V_{ub}|$,
$|V_{td}|$ and $|V_{ts}|$. We will show how all these measurements, together
with theoretical developments, have significantly improved our knowledge on the
flavour sector of the Standard Model.


title: Coupling Constant Unification in Extensions of Standard Model

abstract:
  Unification of electromagnetic, weak, and strong coupling constants is
studied in the extension of standard model with additional fermions and
scalars. It is remarkable that this unification in the supersymmetric extension
of standard model yields a value of Weinberg angle which agrees very well with
experiments. We discuss the other possibilities which can also give same
result.


title: B(d) --> phi K(S) CP asymmetries as an important probe of supersymmetry

abstract:
  The decay $B_d \to \phi K_S$ is a special probe of physics beyond the
Standard Model (SM), since it has no SM tree level contribution. Motivated by
recent data suggesting a deviation from the SM for its time-dependent CP
asymmetry, we examine supersymmetric explanations. Chirality preserving
contributions are generically small, unless gluino is relatively light. Higgs
contributions are also too small to explain a large asymmetry. Chirality
flipping $LR$ and $RL$ gluino contributions actually can provide sizable
effects without conflict with all related results. We discuss how various
insertions can be distinguished, and argue the needed sizes of mass insertions
are reasonable.


title: P and CP violation in B Decays

abstract:
  While the Kobayashi--Maskawa model of CP violation passed its first crucial
precision test in $B\to J/\psi K_S$, other CP asymmetries in $B$ and $B_s$
decays will have to be measured in order to critically test and overconstrain
the model in an unambiguous way. On another front, the chirality of weak
$b$-quark couplings has not yet been carefully tested. We discuss recent
proposals for studying both the chiral and CP-violating phase structures of
these couplings in $B\to D^*\rho$ and $B\to D^*a_1$.


title:
Bulk Scalar Stabilization of the Radion without Metric Back-Reaction in
  the Randall-Sundrum Model

abstract:
  Generalizations of the Randall-Sundrum model containing a bulk scalar field
$\Phi$ interacting with the curvature $R$ through the general coupling $R
f(\Phi)$ are considered. We derive the general form of the effective 4D
potential for the spin-zero fields and show that in the mass matrix the radion
mixes with the Kaluza-Klein modes of the bulk scalar fluctuations. We
demonstrate that it is possible to choose a non-trivial background form
$\Phi_0(y)$ (where $y$ is the extra dimension coordinate) for the bulk scalar
field such that the exact Randall-Sundrum metric is preserved (i.e. such that
there is no back-reaction). We compute the mass matrix for the radion and the
KK modes of the excitations of the bulk scalar relative to the background
configuration $\Phi_0(y)$ and find that the resulting mass matrix implies a
non-zero value for the mass of the radion (identified as the state with the
lowest eigenvalue of the scalar mass matrix). We find that this mass is
suppressed relative to the Planck scale by the standard warp factor needed to
explain the hierarchy puzzle, implying that a mass $\sim 1\tev$ is a natural
order of magnitude for the radion mass. The general considerations are
illustrated in the case of a model containing an $R\Phi^2$ interaction term.


title: $B \to \eta(\eta') K(\pi)$ in the Standard Model with Flavor Symmetry

abstract:
  The observed branching ratios for $B\to K \eta'$ decays are much larger than
factorization predictions in the Standard Model (SM). Many proposals have been
made to reconcile the data and theoretical predictions. In this paper we study
these decays within the SM using flavor U(3) symmetry. If small annihilation
amplitudes are neglected, one needs 11 hadronic parameters to describe $B\to
PP$ decays where $P$ can be one of the $\pi$, $K$, $\eta$ and $\eta'$ nonet
mesons. We find that existing data are consistent with SM with flavor U(3)
symmetry. We also predict several measurable branching ratios and CP
asymmetries for $B \to K (\pi) \eta(\eta')$, $\eta(\eta')\eta(\eta')$ decays.
Near future experiments can provide important tests for the Standard Model with
flavor U(3) symmetry.


title:
Electroweak production of hybrid mesons in a Flux-Tube simulation of
  Lattice QCD

abstract:
  We make the first calculation of the electroweak couplings of hybrid mesons
to conventional mesons appropriate to photoproduction and to the decays of $B$
or $D$ mesons. $E1$ amplitudes are found to be large and may contribute in
charge exchange $\gamma p \to n H^+$ allowing production of (amongst others)
the charged $1^{-+}$ exotic hybrid off $a_2$ exchange. Axial hybrid meson
photoproduction is predicted to be large courtesy of $\pi$ exchange, and its
strange hybrid counterpart is predicted in $B \to \psi K_H(1^+)$ with $b.r.
\sim 10^{-4}$. Higher multipoles, and some implications for hybrid charmonium
are briefly discussed.


title: Spin properties of top quark pairs produced at hadron colliders

abstract:
  We discuss the spin properties of top quark pairs produced at hadron
colliders at next-to-leading order in the coupling constant alpha_s of the
strong interaction. Specifically we present, for some decay channels, results
for differential angular distributions that are sensitive to t tbar spin
correlations.


title: On the Complementarity of Higgs and Radion Searches at LHC

abstract:
  Models with 3-branes in extra dimensions typically imply the existence of a
radion, phi that can mix with the Higgs, h, thereby modifying the Higgs
properties and the prospects for its detectability at the LHC. The presence of
the phi will extend the scope of the LHC searches. Detection of both the phi
and the h might be possible. In this paper, we study the complementarity of the
observation of gg -> h, with h -> gamma gamma or h -> ZZ -> 4 leptons, and gg
-> phi -> ZZ -> 4 leptons at the LHC in the context of the Randall-Sundrum
model. The potential for determining the nature of the detected scalar(s) at
the LHC and at an e+e- linear collider is discussed, both separately and in
combination.


title: Resonant decay of flat directions

abstract:
  We study preheating, i.e., non-perturbative resonant decay, of flat direction
fields, concentrating on MSSM flat directions and the right handed sneutrino.
The difference between inflaton preheating and flaton preheating, is that the
potential is more constraint in the latter case. The effects of a complex
driving field, quartic couplings in the potential, and the presence of a
thermal bath are important and cannot be neglected.
  Preheating of MSSM flat directions is typically delayed due to out-of-phase
oscillations of the real and imaginary components and may be preceded by
perturbative decay or $Q$-ball formation. Particle production due to the
violation of adiabaticity is expected to be inefficient due to back reaction
effects. For a small initial sneutrino VEV, $<N > \lesssim m_N/h$ with $m_N$
the mass of the right handed sneutrino and $h$ a yakawa coupling, there are
tachyonic instabilities. The $D$-term quartic couplings do not generate an
effective mass for the tachyonic modes, making it an efficient decay channel.
It is unclear how thermal scattering affects the resonance.


title:
The \beta-term for D^* --> D \gamma within a heavy-light chiral quark
  model

abstract:
  We present a calculation of the \beta-term for D^* --> D gamma within a
heavy-light chiral quark model. Within the model, soft gluon effects in terms
of the gluon condensate with lowest dimension are included. Also, calculations
of 1/m_c corrections are performed. We find that the value of \beta is rather
sensitive to the constituent quark mass compared to other quantities calculated
within the same model. Also, to obtain a value close to the experimental value,
one has to choose a constituent light quark mass larger than for other
quantities studied in previous papers. For a light quark mass in the range 250
to 300 MeV and a quark condensate in the range -(250-270 MeV)^3 we find the
value (2.5 +- 0.6) GeV^-1. This value is in agreement with the value of \beta
extracted from experiment 2.7 +- 0.2 GeV^-1.


title:
Rate difference between b $\to$ s mu^+ mu^- and b $\to$ s e^+e^- in SUSY
  with large tan$\beta$

abstract:
  We study the inclusive semileptonic rare decay $b \to s l^+ l^-$ in minimal
supergravity model (mSUGRA). If tan$\beta$ is large, down-type quark mass
matrices and their Yukawa couplings cannot be diagonalized at the same basis.
This induces the flavor violating neutral Higgs boson couplings. These
couplings contribute significantly to decay $b \to s mu^+ mu^-$ and $b \to s
tau^+ tau^-$, but negligible to $b \to s e^+ e^-$ decay because of its
negligible $m_e$ mass. The ratio $R \equiv B(b \to s mu^+ mu^-)/ B(b \to s e^+
e^-)$ can be very different from its corresponding value in the Standard Model.
We find that part of parameter space can accommodate a large R value, and that
maximum R value can be larger than 2. We also present our results in $b \to s
tau^+ tau^-$ decay channel. Although it can be not detected now, it is
potentially a new channel for the future observation of new physics.


title: Generalized Parton Distributions from Lattice QCD

abstract:
  We perform a quenched lattice calculation of the first moment of twist-two
generalized parton distribution functions of the proton, and assess the total
quark (spin and orbital angular momentum) contribution to the spin of the
proton.


title:
Anomalous quartic boson couplings via gamma gamma --> WW and gamma gamma
  --> WWZ at the TESLA kinematics

abstract:
  The production of two and three electroweak gauge bosons in the high-energy
$\gamma\gamma$ collisions gives the well opportunity to probe anomalous quartic
gauge boson couplings. The influence of five possible anomalous couplings on
the cross sections for $W^+W^-$, $W^+W^-\gamma$, $W^+W^-Z$ productions has been
investigated at the TESLA kinematics ($\sqrt{S}\sim 1$ TeV). There are the
reasonable discriminations between various anomalous contributions.


title: Chiral Condensates in Quark and nuclear Matter

abstract:
  We present a novel treatment for calculating the in-medium quark condensates.
The advantage of this approach is that one does not need to make further
assumptions on the derivatives of model parameters with respect to the quark
current mass. The normally accepted model-independent result in nuclear matter
is naturally reproduced. The change of the quark condensate induced by
interactions depends on the incompressibility of nuclear matter. When it is
greater than 260 MeV, the density at which the condensate vanishes is higher
than that from the linear extrapolation. For the chiral condensate in quark
matter, a similar model-independent linear behavior is found at lower
densities, which means that the decreasing speed of the condensate in quark
matter is merely half of that in nuclear matter if the pion-nucleon sigma
commutator is six times the average current mass of u and d quarks. The
modification due to QCD-like interactions is found to slow the decreasing speed
of the condensate, compared with the linear extrapolation.


title: Generalized Parton Distributions and Nucleon Resonances

abstract:
  We discuss the relations between Generalized Parton Distributions (GPDs) and
nucleon resonances. We first briefly introduce the concept of "transition"
GPDs. Then we discuss a straightforward application to the modelization of the
N-$\Delta$ magnetic transition form factor. Finally, we discuss the
experimental aspects of the subject and present first preliminary experimental
investigations in this field.