title:
Perturbative corrections to the semileptonic b-decay moments:
  E^\ell_{cut} dependence and running-\alpha_s effects in the OPE approach

abstract:
  We have calculated the perturbative corrections to all the structure
functions in the semileptonic decays of a heavy quark. Assuming an arbitrary
gluon mass as a technical tool allowed to obtain in parallel all the BLM
corrections. We report the basic applications, viz. perturbative corrections to
the hadronic mass and energy moments with full dependence on the charge lepton
energy cut. In the adopted scheme with the OPE momentum scale separation around
1 GeV the perturbative corrections to <M_X^2> are small and practically
independent of E_{cut}; the BLM corrections are small, too. The corrections to
the second mass squared moment show some decrease with E_{cut} consistent with
the effect of the Darwin operator, within the previously estimated theoretical
uncertainty. Perturbative corrections in the pole-type schemes appear
significant and vary with E_\ell, decreasing the moments at higher cuts. The
hardness of hadronic moments is quantitatively illustrated for different cuts
on E_\ell.


title: What can we learn from neutrinoless double beta decay experiments?

abstract:
  We assess how well next generation neutrinoless double beta decay and normal
neutrino beta decay experiments can answer four fundamental questions. 1) If
neutrinoless double beta decay searches do not detect a signal, and if the
spectrum is known to be inverted hierarchy, can we conclude that neutrinos are
Dirac particles? 2) If neutrinoless double beta decay searches are negative and
a next generation ordinary beta decay experiment detects the neutrino mass
scale, can we conclude that neutrinos are Dirac particles? 3) If neutrinoless
double beta decay is observed with a large neutrino mass element, what is the
total mass in neutrinos? 4) If neutrinoless double beta decay is observed but
next generation beta decay searches for a neutrino mass only set a mass upper
limit, can we establish whether the mass hierarchy is normal or inverted? We
base our answers on the expected performance of next generation neutrinoless
double beta decay experiments and on simulations of the accuracy of
calculations of nuclear matrix elements.


title: Neutrino-Electron Scattering Theory

abstract:
  Standard Model predictions for neutrino-electron scattering cross-sections,
including effects of electroweak radiative corrections, are reviewed. The
sensitivity of those quantities to neutrino dipole moments, z' bosons,
dynamical symmetry breaking and other types of ``New Physics'' is described.
Neutrino indices of refraction in matter are also discussed. A perspective on
future initiatives with intense neutrino sources, such as superbeams and
neutrino factories, is given.


title: Electromagnetic Emission and Energy Loss in the QGP

abstract:
  I discuss why photon production from the Quark Gluon Plasma (QGP) presents an
interesting problem, both experimentally and theoretically. I show how the
photon emission rate can be computed under the simplifying assumption that the
QGP fully thermalizes. The theoretical issues are very similar to those for jet
energy loss; so it should be possible to treat them in a common formalism and
relate the predictions of one phenomenon to those of the other.


title:
Warped Supersymmetric Unification with Non-Unified Superparticle
  Spectrum

abstract:
  We present a new supersymmetric extension of the standard model. The model is
constructed in warped space, with a unified bulk symmetry broken by boundary
conditions on both the Planck and TeV branes. In the supersymmetric limit, the
massless spectrum contains exotic colored particles along with the particle
content of the minimal supersymmetric standard model (MSSM). Nevertheless, the
model still reproduces the MSSM prediction for gauge coupling unification and
does not suffer from a proton decay problem. The exotic states acquire masses
from supersymmetry breaking, making the model completely viable, but there is
still the possibility that these states will be detected at the LHC. The
lightest of these states is most likely A_5^XY, the fifth component of the
gauge field associated with the broken unified symmetry. Because supersymmetry
is broken on the SU(5)-violating TeV brane, the gaugino masses generated at the
TeV scale are completely independent of one another. We explore some of the
unusual features that the superparticle spectrum might have as a consequence.


title: Matter Unification in Warped Supersymmetric SO(10)

abstract:
  We construct models of warped unification with a bulk SO(10) gauge symmetry
and boundary conditions that preserve the SU(4)_C x SU(2)_L x SU(2)_R
Pati-Salam gauge group (422). In the dual 4D description, these models are 422
gauge theories in which the apparent unification of gauge couplings in the
minimal supersymmetric standard model is explained as a consequence of strong
coupling in the ultraviolet. The weakness of the gauge couplings at low
energies is ensured in this 4D picture by asymptotically non-free contributions
from the conformal sector, which are universal due to an approximate SO(10)
global symmetry. The 422 gauge symmetry is broken to the standard model group
by a simple set of Higgs fields. An advantage of this setup relative to SU(5)
models of warped unification is that matter is automatically required to fill
out representations of 422, providing an elegant understanding of the quantum
numbers of the standard-model quarks and leptons. The models also naturally
incorporate the see-saw mechanism for neutrino masses and bottom-tau
unification. Finally, they predict a rich spectrum of exotic particles near the
TeV scale, including states with different quantum numbers than those that
appear in SU(5) models.


title: The Wroblewski Parameter from Lattice QCD

abstract:
  Enhancement of strangeness production has since long been proposed as a
promising signal of quark-gluon plasma production. A convenient indicator for
it is the Wroblewski parameter which has been shown to be about a factor two
higher in heavy ion collisions. Using a method proposed by us earlier, we
obtained lattice QCD results for the Wroblewski parameter from our simulations
of QCD with two light quarks both below and above the chiral transition. Our
first principles based and parameter free result compare well with the A-A
data.


title: Trace anomalies and chiral Ward identities

abstract:
  In a simple abelian spinor field theory, the canonical trace identities for
certain axial-vector and axial-scalar operators are reexamined in dimensional
regularization, some disagreements with previous results are found and an
interesting new phenomenon is observed and briefly discussed.


title:
Optimal-Observable Analysis of Possible New Physics Using the b-quark in
  gamma gamma -> tt -> bX

abstract:
  We study possible anomalous top-quark couplings generated by SU(2) x U(1)
gauge invariant dimension-6 effective operators, using the final b-quark
momentum distribution in gamma gamma -> tt -> bX. Taking into account
non-standard tt gamma, tbW and gamma gamma H couplings, we perform an
optimal-observable analysis in order to estimate the precision for the
determination of all relevant non-standard couplings.


title: Tetracritical behavior in strongly interacting theories

abstract:
  We suggest a tetracritical fixed point to naturally occur in strongly
interacting theories. As a fundamental example we analyze the
temperature--quark chemical potential phase diagram of QCD with fermions in the
adjoint representation of the gauge group (i.e. adjoint QCD). Here we show that
such a non trivial multicritical point exists and is due to the interplay
between the spontaneous breaking of a global U(1) symmetry and the center group
symmetry associated to confinement. Our results demonstrate that taking
confinement into account is essential for understanding the critical behavior
as well as the full structure of the phase diagram of adjoint QCD. This is in
contrast to ordinary QCD where the center group symmetry associated to
confinement is explicitly broken when the quarks are part of the theory.


title:
Positivity constraints for lepton polarization in neutrino deep
  inelastic scattering

abstract:
  We consider the spin polarization of leptons produced in neutrino and
antineutrino nucleon deep inelastic scattering, via charged currents, and we
study the positivity constraints on the spin components in a model independent
way. These results are very important, in particular in the case of
$\tau^{\pm}$ leptons, because the polarization information is crucial in all
future neutrino oscillation experiments.


title: Effects of perturbative exchanges in a QCD-string model

abstract:
  The QCD-string model for baryons derived by Simonov and used for the
calculation of baryon magnetic moments in a previous paper is extended to
include also perturbative gluon and meson exchanges. The mass spectrum of the
baryon multiplet is studied. For the meson interaction either the pseudoscalar
or pseudovector coupling is used. Predictions are compared with the
experimental data. Besides these exchanges the influence of excited quark
orbitals on the baryon ground state are considered by performing a multichannel
calculation. The nucleon-Delta splitting increases due to the mixing of higher
quark states while the baryon magnetic momenta decrease. The multichannel
calculation with perturbative exchanges is shown to yield reasonable magnetic
moments while the mass spectrum is close to experiment.


title: Generalized sum rules of the nucleon in the CQM

abstract:
  The sum rules serve a powerful tool to study the nucleon structure by
providing a bridge between the statical properties of the nucleon (such as
electrical charge, and magnetic moment) and the dynamical properties (e.g. the
transition amplitudes to excited states) in a wide range of energy and momentum
transfer $Q^2$. We study the generalized sum rules of the nucleon in the
framework of the constituent quark model. We use two different CQM, the one
with the hypercentral potential \cite{hccqm1}, \cite{hccqm2}, \cite{hccqm3},
and with the harmonic oscillator potential \cite{KI}, both with only few
parameters fixed to the baryonic spectrum. We confront our results to the model
independent sum rules and to the predictions of the phenomenological MAID
\cite{MAID} model and find that in all the cases considered, in the
intermediate $Q^2$ range (0.2-1.5 GeV$^2$), both CQM models provide a good
description of the sum rules on the neutron.


title: Cancelling Juttner Distributions for Space-like Freeze-out

abstract:
  We study freeze out process of particles across a three dimensional
space-time hypersurface with space-like normal. The problem of negative
contribution is discussed with respect to conservation laws, and a simple and
practical new one-particle distribution for the post FO side is introduced, the
Cancelling Juttner distribution.


title:
Patterns of Lepton-Flavour Violation Motivated by Decoupling and
  Sneutrino Inflation

abstract:
  We present predictions for flavour-violating charged-lepton decays induced by
the seesaw mechanism implemented within the constrained minimal supersymmetric
standard model (CMSSM) with universal input soft supersymmetry breaking terms.
We assume that one heavy singlet neutrino almost decouples from the see-saw
mechanism, as suggested by the pattern of light neutrino masses and mixing
angles. This is suggested independently by sneutrino inflation with a low
reheating temperature, T(RH)<10^7 GeV, so as to avoid overproducing gravitinos.
This requirement further fixes the mass of the weakly-coupled sneutrino, whose
decays may lead to leptogenesis. We find that BR(mu->e gamma)>10^(-13) but
BR(tau->mu gamma)<10^(-9) in the bulk of the acceptable parameter space, apart
from a few isolated points. The ratio BR(mu->e gamma)/BR(tau->mu gamma) depends
on only one complex parameter, and is particularly interesting to compare with
experiment.


title: Medium Modification of the Jet Properties

abstract:
  In the case that a dense medium is created in a heavy ions collision,
high-E_t jets are expected to be broadened by medium-modified gluon emission.
This broadening is directly related, through geometry, to the energy loss
measured in inclusive high-p_t particle suppression. We present here the
modifications of jet observables due to the presence of a medium for the case
of azimuthal jet energy distributions and k_t-differential multiplicities
inside the jets.


title:
Twist-3 Single-Spin Asymmetries in Semi-Inclusive Deep-Inelastic
  Scattering

abstract:
  The single spin asymmetries for a longitudinally polarized lepton beam or a
longitudinally polarized nucleon target in semi-inclusive deep-inelastic
scattering are twist-3 observables. We study these asymmetries in a simple
diquark spectator model of the nucleon. Analogous to the case of transverse
target polarization, non-vanishing asymmetries are generated by gluon exchange
between the struck quark and the target system. It is pointed out that the
coupling of the virtual photon to the diquark is needed in order to preserve
electromagnetic gauge invariance at the twist-3 level. The calculation
indicates that previous analyses of these observables are incomplete.


title: TeV scale resonant leptogenesis from supersymmetry breaking

abstract:
  We propose a model of TeV-scale resonant leptogenesis based upon recent
models of the generation of light neutrino masses from supersymmetry-breaking
effects with TeV-scale right-handed (rhd) neutrinos, $N_i$. The model leads to
naturally large cosmological lepton asymmetries via the resonant behaviour of
the one-loop self-energy contribution to $N_i$ decay. Our model addresses the
primary problems of previous phenomenological studies of low-energy
leptogenesis: a rational for TeV-scale rhd neutrinos with small Yukawa
couplings so that the out-of equilibrium condition for $N_i$ decay is
satisfied; the origin of the tiny, but non-zero mass splitting required between
at least two $N_i$ masses; and the necessary non-trivial breaking of flavour
symmetries in the rhd neutrino sector. The low mass-scale of the rhd neutrinos
and their superpartners, and the TeV-scale $A$-terms automatically contained
within the model offer opportunities for partial direct experimental tests of
this leptogenesis mechanism at future colliders.


title: Chiral doublers of heavy-light baryons

abstract:
  We discuss the consequences of the chiral doubling scenario for baryons built
of heavy and light quarks. In particular, we use the soliton description for
baryons, demonstrating why each heavy-light baryon should be accompanied by the
opposite parity partner. Our argumentation holds both for ordinary baryons and
for exotic heavy pentaquarks which are required by the symmetries of QCD to
appear in parity doublets, seperated by the mass shift of the chiral origin.
Interpreting the recently observed by BaBaR, CLEO and Belle charmed mesons with
assignment $(0^+,1^+)$ as the chiral partners of known $D$ and $D^*$ mesons,
allows us to estimate the parameters of the mesonic effective lagrangian, and
in consequence, estimate the masses of ground states and excited states of both
parities. In particular, we interpret the state recently reported by the H1
experiment at HERA as a chiral partner $\tilde{\Theta}_c^0(3099)$ of yet
undiscovered ground state pentaquark $\Theta_c^0(2700)$.


title: Analytic two-loop virtual corrections to $b --> d l^+ l^-$

abstract:
  We compute the two-loop virtual corrections to the flavour changing neutral
current process $b --> d l^+ l^-$. As calculation techniques integration by
parts identities and the method of differential equations are used. The result
is presented in closed form as a function of $q^2/m_b^2$, where $q^2$ is the
invariant mass of the lepton pair and $m_b$ is the b-quark mass.


title: Glueball-Glueball Interaction in The Context of an Effective Theory

abstract:
  In this work we use a mapping technique to derive in the context of a
constituent gluon model an effective Hamiltonian that involves explicit gluon
degrees of freedom. We study glueballs with two gluons using the Fock-Tani
formalism.


title: Quarkonium: New Developments

abstract:
  To illustrate the campaign to understand heavy quarkonium systems, I focus on
a puzzling new state, $X(3872) \to \pi^+\pi^- J/\psi$. Studying the influence
of open-charm channels on charmonium properties leads us to propose a new
charmonium spectroscopy: additional discrete charmonium levels that can be
discovered as narrow resonances of charmed and anticharmed mesons. I recall
some expectations for a new spectroscopy of mesons with beauty and charm, the
$B_c$ ($b\bar{c}$) system. Throughout, I call attention to open issues for
theory and experiment.


title: Novel two-loop SUSY effects on CP asymmetry in $B\to \phi K_{s}$

abstract:
  Inspired by the exotic measurements on the CP asymmetry in $B\to \phi K_{s}$,
we study a new diagram in supersymmetric models which can make the difference
$\sin2\phi^{eff}_{1}(J/\Psi K_{s})-\sin2\phi^{eff}_{1}(\phi K_{s})$ to be
$20-50%$ after satisfying the constraint from $b\to s \gamma$. We also find
that the direct CP asymmetry of $b\to s \gamma$ could be $\sim 10%$ and
testable at $B$ factories.


title: Exclusive Double Diffractive Events: Menu for LHC

abstract:
  Exclusive double diffractive events (EDDE) are considered in the framework of
the Regge-eikonal approach and perturbative calculations for "hard"
subprocesses. Total and differential cross-sections for processes $p+p\to
p+X+p$ are calculated.


title: The study of the charged top-pion decay processes

abstract:
  In the framework of top-color assisted technicolor(TC2) theory, we study the
four decay processes of charged top-pion, i.e.,
  $\Pi^{+}_{t}\to t\bar{b}$, $\Pi^{+}_{t}\to c\bar{b}$, $\Pi^{+}_{t}\to
W^{+}\gamma$, $\Pi^{+}_{t}\to W^{+}Z^{0}$, the decay branching ratio of these
modes are calculated. The results show that the main decay channels of charged
top-pion are the tree level modes: $\Pi_t^+ \to t\bar{b}$ and $\Pi_t^+ \to
c\bar{b}$. Light $\Pi_t^+$ is easier to be detected than heavy one at future
coliders. So, the study provides us some useful information to search for
charged top-pion.


title: Hadronic Decays Involving Heavy Pentaquarks

abstract:
  Recently several experiments have reported evidences for pentaquark
$\Theta^+$. H1 experiment at HERA-B has also reported evidence for $\Theta_c$.
$\Theta^+$ is interpreted as a bound state of an $\bar s$ with other four light
quarks $udud$ which is a member of the anti-decuplet under flavor $SU(3)_f$.
While $\Theta_c$ is a state by replacing the $\bar s$ in $\Theta^+$ by a $\bar
c$. One can also form $\Theta_b$ by replacing the $\bar s$ by a $\bar b$. The
charmed and bottomed heavy pentaquarks form triplets and anti-sixtets under
$SU(3)_f$. We study decay processes involving at least one heavy pentaquark
using $SU(3)_f$ and estimate the decay widths for some decay modes. We find
several relations for heavy pentaquarks decay into another heavy pentaquark and
a $B (B^*)$ or a $D(D^*)$ which can be tested in the future. $B$ can decay
through weak interaction to charmed heavy pentaquarks. We also study some $B$
decay modes with a heavy pebtaquark in the final states. Experiments at the
current $B$ factories can provide important information about the heavy
pentaquark properties.


title: The Three-Loop Splitting Functions in QCD: The Non-Singlet Case

abstract:
  We compute the next-to-next-to-leading order (NNLO) contributions to the
three splitting functions governing the evolution of unpolarized non-singlet
combinations of quark densities in perturbative QCD. Our results agree with all
partial results available in the literature. We find that the correct leading
logarithmic (LL) predictions for small momentum fractions x do not provide a
good estimate of the respective complete results. A new, unpredicted LL
contribution is found for the colour factor d^{abc}d_{abc} entering at three
loops for the first time. We investigate the size of the corrections and the
stability of the NNLO evolution under variation of the renormalization scale.
Except for very small x the corrections are found to be rather small even for
large values of the strong coupling constant, in principle facilitating a
perturbative evolution into the sub-GeV regime.


title:
Double-logarithmic behavior of inelastic fermion form factors in QED and
  QCD

abstract:
  The effective kinematic diagram technique is applied to study inelastic form
factors of electron and quark in QED and QCD. The explicit expressions for
these form factors in the double-logarithmic approximation are presented. The
self-consistency of the results is shown by demonstrating the fulfillment of
the Kinoshita-Lee-Nauenberg theorem.


title: Higgs Boson Production in Weak Boson Fusion at Next-to-Leading Order

abstract:
  The weak boson fusion process for neutral Higgs boson production is
investigated with particular attention to the accuracy with which the Higgs
boson coupling to weak bosons can be determined at CERN Large Hadron Collider
(LHC) energies in final states that contain a Higgs boson plus at least two
jets. Using fully differential perturbative matrix elements for the weak boson
fusion signal process and for the QCD background processes, we generate events
in which a Higgs boson is produced along with two jets that carry large
transverse momentum. The effectiveness of different prescriptions to enhance
the signal to background ratio is studied, and the expected signal purities are
calculated in each case. We find that a simple cut on the rapidity of one
final-state jet works well. We determine that an accuracy of delta_g/g ~ 10% on
the effective coupling g may be possible after ~ 200 fb^-1 of integrated
luminosity is accumulated at the LHC.


title: Heavy quark production and gluon shadowing at RHIC and LHC

abstract:
  I review the color dipole formulation of heavy quark production in the light
of recent RHIC data. Since charm and bottom production directly probe the gluon
density, these processes allow one to study shadowing and parton saturation at
RHIC and LHC. The dipole approach provides a convenient framework to calculate
these nuclear effects. I present numerical results for open charm and bottom
production in proton-proton and proton-nucleus collisions and discuss
transverse momentum broadening of heavy quarkonia.


title: Trinification with sin^2\theta_W^0=3/8 and seesaw neutrino mass

abstract:
  We realize a supersymmetric trinification model with three families of $({\bf
27}_{\rm tri}+{\bf 27}_{\rm tri} +\bar{\bf 27}_{\rm tri})$ by the $Z_3$
orbifold compactification with two Wilson lines. It is possible to break the
trinification group to the supersymmetric standard model. This model has
several interesting features: the {\it hypercharge quantization},
$\sin^2\theta_W^0=\frac38,$ naturally light neutrino masses, and introduction
of R-parity. The {\it hypercharge quantization} is realized by the choice of
the vacuum, naturally leading toward a supersymmetric standard model.


title: The Perturbative Odderon in Quasidiffractive Photon-Photon Scattering

abstract:
  We study the perturbative Odderon in the quasidiffractive process gamma(*)
gamma(*) to eta_c eta_c. At high energies this process is dominated by Odderon
exchange and can be viewed as the theoretically cleanest test of the
perturbative Odderon. We calculate the differential and total cross section, as
well as the dependence on the energy and on the photon virtualities taking into
account the effects of resummation of logarithms of the energy. The results are
compared with those obtained with a simple exchange of three noninteracting
gluons. We present the expected cross section for this process at a future
Linear Collider and discuss implications for other processes involving the
perturbative Odderon.


title: Viable Supersymmetry and Leptogenesis with Anomaly Mediation

abstract:
  The seesaw mechanism that explains the small neutrino masses comes naturally
with supersymmetric (SUSY) grand unification and leptogenesis. However, the
framework suffers from the SUSY flavor and CP problems, and has a severe
cosmological gravitino problem. We propose anomaly mediation as a simple
solution to all these problems, which is viable once supplemented by the
D-terms for U(1)_Y and U(1)_{B-L}. Even though the right-handed neutrino mass
explicitly breaks U(1)_{B-L} and hence reintroduces the flavor problem, we show
that it lacks the logarithmic enhancement and poses no threat to the framework.
The thermal leptogenesis is then made easily consistent with the gravitino
constraint.


title: Q-ball Metamorphosis

abstract:
  Flat directions in the minimal supersymmetric standard model are known to
deform into non-topological solitons, Q-balls, which generally possess both
baryon and lepton asymmetries. We investigate how Q-balls evolve if some of the
constituent fields of the flat direction decay into light species. It is found
that the Q-balls takes a new configuration whose energy per charge slightly
increases due to the decay. Specifically, we show that all the stable Q-balls
eventually transform into pure B-balls via the decay into neutrinos.


title: QED corrections to the evolution of parton distributions

abstract:
  We study the systematic inclusion of QED corrections in the evolution of
parton distributions. O(alpha) corrections modify the evolution equation for
parton distributions. They introduce additional parton distributions, like the
photon distribution in the nucleon, and lead to additional mixing effects. We
discuss the modifications for a realistic model of N_f,up up-type flavours and
N_f,down down-type flavours. We have implemented these corrections into a
numerical program and we quantify the size of these effects in a toy model. The
corrections reach the order of 1%.


title:
Saturation and shadowing in high-energy proton-nucleus dilepton
  production

abstract:
  We discuss the inclusive dilepton cross section for proton (quark)-nucleus
collisions at high energies in the very forward rapidity region. Starting from
the calculation in the quasi-classical approximation, we include low-x
evolution effects in the nucleus and predict leading twist shadowing together
with anomalous scaling behaviour.


title:
Singularities of Feynman propagators and Corrections of Cutting rules
  and usual momentum integral algorism in dimensional regularization
  prescription

abstract: This manuscript has been removed duo to incorrect contents.


title: Gravitino and Goldstino at Colliders

abstract:
  We consider theories with spontaneously broken global or local supersymmetry
where the pseudo-goldstino or the gravitino is the lightest superparticle
(LSP). Assuming that the long-lived next-to-lightest superparticle (NSP) is a
charged slepton, we study several supergravity predictions: the NSP lifetime,
angular and energy distributions in 3-body NSP decays. The characteristic
couplings of the gravitino, or goldstino, can be tested even for very small
masses.


title:
Medium Modifications of Charm and Charmonium in High-Energy Heavy-Ion
  Collisions

abstract:
  The production of charmonia in heavy-ion collisions is investigated within a
kinetic theory framework simultaneously accounting for dissociation and
regeneration processes in both quark-gluon plasma (QGP) and hadron-gas phases
of the reaction. In-medium modifications of open-charm states (c-quarks,
D-mesons) and the survival of J/psi mesons in the QGP are included as inferred
from lattice QCD. Pertinent consequences on equilibrium charmonium abundances
are evaluated and found to be especially relevant to explain the measured
centrality dependence of the psi'/psi ratio at SPS. Predictions for recent
In-In experiments, as well as comparisons to current Au-Au data from RHIC, are
provided.


title: A Diquark Chiral Effective Theory and Exotic Baryons

abstract:
  A chiral effective theory of quarks and diquarks is formulated and applied to
exotic tetraquarks and pentaquarks. The effective theory is similar to the
chiral quark effective theory with the addition of diquark degrees of freedom
and couplings to quarks. Chiral symmetry through generalized Goldberger-Treiman
relations, fixes the mass splitting between the even and odd parity diquarks to
be about 600 MeV. We provide an estimate of the parameters of the effective
theory from both the random instanton model and known data on the low lying
scalar nonet. We assess the static properties of the exotic baryons, such as
their masses, magnetic moments and decay widths. We show that the small decay
widths of the newly reported exotics are largely due to a large tunnelling
suppression of a quark between a pair of diquarks. We find $\Gamma(\Theta^+\to
K^+n)\simeq 2.5\sim7.0 MeV$ and $\Gamma(\Xi^{--}\to\Xi^- \pi^-)\simeq
1.7\sim4.8 MeV$.


title: Wavelets: mathematics and applications

abstract:
  The notion of wavelets is defined. It is briefly described {\it what} are
wavelets, {\it how} to use them, {\it when} we do need them, {\it why} they are
preferred and {\it where} they have been applied. Then one proceeds to the
multiresolution analysis and fast wavelet transform as a standard procedure for
dealing with discrete wavelets. It is shown which specific features of signals
(functions) can be revealed by this analysis, but can not be found by other
methods (e.g., by the Fourier expansion). Finally, some examples of practical
application are given (in particular, to analysis of multiparticle production}.
Rigorous proofs of mathematical statements are omitted, and the reader is
referred to the corresponding literature.


title:
The Inverse Problem of Remote Neutrino Diagnostics of Intrareactor
  Processes

abstract:
  Using the well-known experimental data the inverse problem of neutrino
diagnostics of reactor core is considered. The solution of this problem makes
it possible to determine distantly the current value of nuclear density of each
nuclear fuel components with known accuracy and also opens up the possibility
for the development of neutrino online technology of temporal evolution of
nuclear fuel isotopic structure and reactor power.


title: Quenching of high $p_\perp$ hadrons by (pre--)hadronic FSI at RHIC

abstract:
  Recently we have conjectured that (in-)elastic collisions of (pre-)hadronic
high momentum states with the bulk of hadrons in the late fireball might
substantially account for the attenuation of the high transverse momentum
hadrons at RHIC. The potential hadronic attenuation has therefore to be
addressed in further detail before definite conclusions on possible QCD effects
in a deconfined QGP phase can be drawn with respect to the materializing jets.
  From our transport studies we find that the interactions of fully formed
hadrons are practically negligible in central Au+Au collisions at \sqrt s = 200
GeV for $p_\perp\geq 6 GeV$, but have some importance for the shape of the
ratio $R_{AA}$ at lower $p_\perp$ ($\leq 6 GeV$). However, a significant part
of the large suppression seen experimentally is attributed to inelastic
interactions of 'leading' jet-like pre-hadrons with the dense hadronic
environment. In addition, we also show within this scenario first (preliminary)
results of near-side and far-side correlations of high $p_\perp$ particles from
central Au+Au collisions at $\sqrt{s}$ = 200 GeV. It turns out that the
near-side correlations are unaltered -- in accordance with experiment --
whereas the far-side correlations are suppressed by $\sim$ 60%. Since the
experimental observation is a nearly complete disappearance of the far-side jet
there should be some additional and earlier partonic interactions in the dense
and possibly colored medium.


title: Leptogenesis, neutrino masses and gauge unification

abstract:
  Leptogenesis is considered in its natural context where Majorana neutrinos
fit in a gauge unification scheme and therefore couple to some extra gauge
bosons. The masses of some of these gauge bosons are expected to be similar to
those of the heavy Majorana particles, and this can have important consequences
for leptogenesis. In fact, the effect can go both ways. Stricter bounds are
obtained on one hand due to the dilution of the CP-violating effect by new
decay and scattering channels, while, in a re-heating scheme, the presence of
gauge couplings facilitates the re-population of the Majorana states. The
latter effect allows in particular for smaller Dirac couplings.


title: $J^P={1/2}^-$ Pentaquarks in Jaffe and Wilczek's Diquark Model

abstract:
  If Jaffe and Wilczek's diquark picture for $\Theta_5$ pentaquark is correct,
there should also exist a $SU_F$(3) pentaquark octet and singlet with no
orbital excitation between the diquark pair, hence $J^P={1/2}^-$. These states
are lighter than the $\Theta_5$ anti-decuplet and lie close to the orbitally
excited (L=1) three-quark states in the conventional quark model. We calculate
their masses and magnetic moments and discuss their possible strong decays
using the chiral Lagrangian formalism. Among them two pentaquarks with nucleon
quantum numbers may be narrow. Selection rules of strong decays are derived. We
propose the experimental search of these nine additional $J^P={1/2}^-$ baryon
states. Especially there are two additional $J^P={1/2}^-$ $\Lambda$ baryons
around $\Lambda (1405)$. We also discuss the interesting possibility of
interpreting $\Lambda (1405)$ as a pentaquark. The presence of these additional
states will provide strong support of the diquark picture for the pentaquarks.
If future experimental searches fail, one has to re-evaluate the relevance of
this picture for the pentaquarks.


title: The Lifetime Asymmetry of Polarized Muons in Flight

abstract:
  Based on the parity violation in Standard Model, we study the dependence of
the lifetime on the polarization of an initial-state fermion in weak
interactions. The fermion lifetime was usually calculated in terms of spin
states. However, after comparing spin states with helicity states and chirality
states, it is pointed out that a spin state is helicity degenerate, and the
spin state and the helicity state are entirely different. Using helicity
states, we calculate the lifetime of polarized muons. The result shows that the
lifetime of right-handed polarized muons is always greater than that of
left-handed polarized muons with the same speed in flight.


title: Lepton flavor violation in the SUSY seesaw model: an update

abstract:
  We present an update of previous work on charged lepton flavor violation
(LFV) in the seesaw model. The most recent neutrino data fits and post WMAP
mSUGRA benchmark scenarios are used as input. In this framework we compare the
sensitivity of rare radiative decays on the right-handed Majorana mass scale
M_R with the reach in slepton-pair production at a future linear collider.


title: Power Corrections in Charmless B Decays

abstract:
  In this paper, we focus on the role of power corrections in QCD
factorization(QCDF) method in charmless two-body nonleptonic $B$ meson decays.
We use the ratio of the branching fraction of $B^+ \to \pi^+ K^{\ast 0}$ to
that of $B^0 \to \pi^- \rho^+$, for which the theoretical uncertainties are
greatly reduced, to show clearly that the power corrections in charmless B
decays are probably large. With other similar ratios considered, for example,
for the $B^0 \to K^- \rho^+$ decay, it is very likely that, among various
sources of power corrections, annihilation topology plays an indispensable role
at least for penguin dominated $\rm PV$ channels. We also consider some
selective ratios of direct CP asymmetries. Among these, we find that, if power
corrections other than the chirally enhanced power corrections and annihilation
topology were negligible, QCDF would predict the direct CP asymmetry of $B \to
\pi^+ \pi^-$ to be about 3 times larger than that of $B \to \pi^\pm K^\mp$,
with opposite sign. Experimentally any significant deviation from this
prediction would suggest either new physics or possibly the importance of
long-distance rescattering effects.


title:
SUSY Normal Scalar Mass Hierarchy Reconciles (g-2), b->s,gamma and Relic
  Density

abstract:
  Recent experimental and theoretical determinations of (g-2)_muon, Omega*h^2
and BF(b->s,gamma) place exceedingly tight constraints on the minimal
supergravity (mSUGRA) model. We advocate relaxing the generational universality
of mSUGRA, so that GUT scale third generation scalar masses are greater than
the (degenerate) first and second generation scalar masses (a normal scalar
mass hierarchy (NMH)). The non-degeneracy allows for a reconciliation of all
the above constraints, and also respects FCNC limits from B_d-B_dbar mixing and
b -> s,gamma. The NMH SUGRA model leads to the prediction of relatively light
first and second generation sleptons. This yields large rates for multilepton
collider signatures at the CERN LHC and also possibly at the Fermilab Tevatron.
The spectrum of light sleptons should be accessible to a sqrt{s}=0.5-1TeV
linear e^+e^-$ collider.


title:
Stokes Vector of Photon in the Decays B^0 -> rho^0 gamma and B^0 -> K^*
  gamma

abstract:
  We consider a model for the decay Bbar^0 -> rho^0 gamma in which the
short-distance amplitude determined by the Hamiltonian describing b -> d gamma
is combined with a typical long-distance contribution Bbar^0 -> D^+ D^- ->
rho^0 gamma. The latter possesses a significant dynamical phase which induces a
CP-violating asymmetry A_CP, as well as an important modification of the Stokes
vector of the photon. The components S_1 and S_3 of the Stokes vector S = (S_1,
S_2, S_3) can be measured in the decay Bbar^0 -> rho^0 gamma^* -> pi^+ pi^- e^+
e^- where they produce a characteristic effect in the angular distribution d
Gamma / d phi, phi being the angle between the pi^+ pi^- and e^+ e^- planes. A
similar analysis is carried out for the decays Bbar^0 -> Kbar^* gamma and
Bbar^0 -> Kbar^* gamma^* -> pi^+ K^- e^+ e^-


title:
Oscillations and evolution of a hot and dense gas of flavor neutrinos: a
  quantum field theory study

abstract:
  We study the time evolution of the distribution functions for hot and or
degenerate gases of two flavors of Dirac neutrinos as a result of flavor mixing
and dephasing. This is achieved by obtaining the time evolution of the flavor
density matrix directly from quantum field theory at finite temperature and
density. The time evolution features a rich hierarchy of scales which are
widely separated in the nearly degenerate or relativistic cases and originate
in interference phenomena between particle and antiparticle states. In the
degenerate case the flavor asymmetry $\Delta N(t)$ relaxes to the asymptotic
limit $\Delta N(\infty)=\Delta N(0)\cos^2(2\theta)$ via dephasing resulting
from the oscillations between flavor modes that are not Pauli blocked, with a
power law $1/t$ for $t>t_s \approx 2 k_F/\Delta M^2$. $k_F$ is the largest of
the Fermi momenta. The distribution function for flavor neutrinos and
antineutrinos as well as off-diagonal densities are obtained. Flavor
particle-antiparticle pairs are produced by mixing and oscillations with
typical momentum $k\sim \bar{M}$ the average mass of the neutrinos. An
effective field theory description emerges on long time scales in which the
Heisenberg operators obey a Bloch-type equation of motion valid in the
relativistic and nearly degenerate cases. We find the non-equilibrium
propagators and correlation functions in this effective theory and discuss its
regime of validity as well as the potential corrections.


title: The K -> pi vector form factor at zero momentum transfer on the lattice

abstract:
  We present a quenched lattice study of the form factors $f_+(q^2)$ and
$f_0(q^2)$ of the matrix elements $<\pi | \bar{s} \gamma_\mu u | K >$. We focus
on the second-order SU(3)-breaking quantity $[1 - f_+(0)]$, which is necessary
to extract $|V_{us}|$ from $K_{\ell 3}$ decays. For this quantity we show that
it is possible to reach the percent precision which is the required one for a
significant determination of $|V_{us}|$. The leading quenched chiral logarithms
are corrected for by using analytic calculations in quenched chiral
perturbation theory. Our final result, $f_+^{K^0\pi^-}(0) = 0.960 \pm
0.005_{\rm stat} \pm 0.007_{\rm syst}$, where the systematic error does not
include the residual quenched effects, is in good agreement with the estimate
made by Leutwyler and Roos. A comparison with other non-lattice computations
and the impact of our result on the extraction of $|V_{us}|$ are also
presented.


title: Double-diffractive chi meson production at the hadron colliders

abstract:
  The double-diffractive production of chi_c and chi_b mesons, with a rapidity
gap on either side, is studied, using both the Regge formalism and the
perturbative QCD approach. Due to the rather low scale, the exclusive
double-diffractive process pp \to p + chi + p is predicted to dominate, whereas
the probability that the incoming protons dissociate is expected to be
relatively small. We evaluate the corresponding chi production cross sections
at the Tevatron and LHC energies. For the double-diffractive process with
proton dissociation, it is possible to select events with large transverse
momenta transferred through the rapidity gaps, by measuring the transverse
energy, E_\perp, flows in the proton fragmentation regions. Then the large
E_\perp provides a scale to justify the use of perturbative QCD, and to allow a
spin-parity analysis of the centrally produced system to be performed, by
studying the azimuthal angular correlations between the directions of the
forward and backward E_\perp flows. The central production of the new X(3872)
charmonium state is considered.


title: Anomalous commutators and electroweak baryogenesis

abstract:
  Electroweak vacuum transition processes (sphalerons) in the early Universe
provide a possible explanation of the baryon asymmetry. Combining this physics
with the anomalous commutators of Adler and Boulware and renormalization group
invariance, we argue that electroweak baryon number violation also induces a
``topological condensate'' in the vacuum. QCD sphaleron processes act to
distribute the baryon number violation between both left and right handed
quarks and induce a spin independent component in this ``condensate''.


title: Mass of the rho^0 meson in ultra-relativistic heavy-ion collision

abstract:
  We study the behavior of the rho vector mass in the context of the almost
baryon-free environment of an ultra-relativistic heavy-ion collision. We show
that rho scattering within the hadronic phase of the collision leads to a
temperature dependent, decrease of its intrinsic mass at rest, compared to the
value in vacuum. The main contributions arise from s-channel scattering with
pions through the formation of a1 resonances as well as with nucleons through
the formation of even parity, spin 3/2 [N(1720)] and 5/2 [Delta(1905)] nucleon
resonances. We show that it is possible to achieve a shift in the intrinsic
rho^0 mass of order - 40 MeV, when including the contributions of all the
relevant mesons and baryons that take part in the scattering, for temperatures
between chemical and kinetic freeze-out.


title: Heavy-to-light decays with a two-loop accuracy

abstract:
  We present a determination of a new class of three-loop Feynman diagrams
describing heavy-to-light transitions. We apply it to find the O(alpha_s^2)
corrections to the top quark decay t -> bW and to the distribution of lepton
invariant mass in the semileptonic b quark decay b -> ul\nu. We also confirm
the previously determined total rate of that process as well as the O(alpha^2)
corrections to the muon lifetime.


title: Does the Low CMB Quadrupole Provide a New Cosmic Coincidence Problem ?

abstract:
  We point out that the recent WMAP findings of a suppressed large scale power
in the Cosmic Microwave Background anisotropy power spectrum, if of
cosmological origin, make the case for a new cosmic coincidence problem.The
observed suppression of anisotropies at large angles requires an explanation
for why this suppression is occuring {\it only} for perturbation wavelengths of
the order of our present Hubble horizon. This is a very challenging task since
a consistent model for the emerging picture of the universe has to address any
cosmic coincidence and thus may reveal a deeper inter-relation with the dark
energy problem.


title: Proposal for a Precision Measurement of |Vub|

abstract:
  A new method for a precision measurement of the CKM matrix element |Vub| is
discussed, which combines good theoretical control with high efficiency and a
powerful discrimination against charm background. The resulting combined
theoretical uncertainty on |Vub| is estimated to be 10%.


title: Dark Matter, Light Stops and Electroweak Baryogenesis

abstract:
  We examine the neutralino relic density in the presence of a light top
squark, such as the one required for the realization of the electroweak
baryogenesis mechanism, within the minimal supersymmetric standard model. We
show that there are three clearly distinguishable regions of parameter space,
where the relic density is consistent with WMAP and other cosmological data.
These regions are characterized by annihilation cross sections mediated by
either light Higgs bosons, Z bosons, or by the co-annihilation with the
lightest stop. Tevatron collider experiments can test the presence of the light
stop in most of the parameter space. In the co-annihilation region, however,
the mass difference between the light stop and the lightest neutralino varies
between 15 and 30 GeV, presenting an interesting challenge for stop searches at
hadron colliders. We present the prospects for direct detection of dark matter,
which provides a complementary way of testing this scenario. We also derive the
required structure of the high energy soft supersymmetry breaking mass
parameters where the neutralino is a dark matter candidate and the stop
spectrum is consistent with electroweak baryogenesis and the present bounds on
the lightest Higgs mass.


title: Hard gluon damping in hot QCD

abstract:
  The gluon collisional width in hot QCD plasmas is discussed with emphasis on
temperatures near $T_c$, where the coupling is large. Considering its effect on
the entropy, which is known from lattice calculations, it is argued that the
width, which in the perturbative limit is given by $\gamma \sim g^2 \ln(1/g)
T$, should be sizeable at intermediate temperatures but has to be small close
to $T_c$. Implications of these results for several phenomenologically relevant
quantities, such as the energy loss of hard jets, are pointed out.


title: Light spin-1/2 or spin-0 Dark Matter particles

abstract:
  We recall and precise how light spin-0 particles could be acceptable Dark
Matter candidates, and extend this analysis to spin-1/2 particles. We evaluate
the (rather large) annihilation cross sections required, and show how they may
be induced by a new light neutral spin-1 boson U. If this one is vectorially
coupled to matter particles, the (spin-1/2 or spin-0) Dark Matter annihilation
cross section into e+e- automatically includes a v_dm^2 suppression factor at
threshold, as desirable to avoid an excessive production of gamma rays from
residual Dark Matter annihilations. We also relate Dark Matter annihilations
with production cross sections in e+e- scatterings. Annihilation cross sections
of spin-1/2 and spin-0 Dark Matter particles are given by exactly the same
expressions. Just as for spin-0, light spin-1/2 Dark Matter particles
annihilating into e+e- could be responsible for the bright 511 keV gamma ray
line observed by INTEGRAL from the galactic bulge.


title: A supersymmetric model of gamma ray bursts

abstract:
  We propose a model for gamma ray bursts in which a star subject to a high
level of fermion degeneracy undergoes a phase transition to a supersymmetric
state. The burst is initiated by the transition of fermion pairs to sfermion
pairs which, uninhibited by the Pauli exclusion principle, can drop to the
ground state of minimum momentum through photon emission. The jet structure is
attributed to the Bose statistics of sfermions whereby subsequent sfermion
pairs are preferentially emitted into the same state (sfermion amplification by
stimulated emission). Bremsstrahlung gamma rays tend to preserve the
directional information of the sfermion momenta and are themselves enhanced by
stimulated emission.


title:
Electroweak Precision Observables in the MSSM with Non-Minimal Flavor
  Violation

abstract:
  The leading corrections to electroweak precision observables in the MSSM with
non-minimal flavor violation (NMFV) are calculated and the effects on M_W and
sin^2 theta_eff are analyzed. The corrections are obtained by evaluating the
full one-loop contributions from the third and second generation scalar quarks,
including the mixing in the scalar top and charm, as well as in the scalar
bottom and strange sector. Furthermore the leading corrections to the mass of
the lightest MSSM Higgs boson, m_h, is obtained. The electroweak one-loop
contribution to M_W can amount up to 140 MeV and up to 70x10^{-5} for sin^2
theta_eff, allowing to set limits on the NMFV parameters. The corrections for
m_h are not significant for moderate generation mixing.


title: Initial state effects in the Color Glass Condensate

abstract:
  The Color Glass Condensate provides a systematic power counting of initial
state effects in high energy QCD. We briefly discuss in this framework quark
and gluon production in high energy collisions.


title: Vortices and type-I superconductivity in neutron stars

abstract:
  In a recent paper by Link, it was pointed out that the the standard picture
of the neutron star core, composed of a mixture of a neutron superfluid and a
proton type-II superconductor, is inconsistent with observations of long period
precession in isolated pulsars. In the following we will show that intervortex
force between the magnetic flux tubes may be attractive resulting in a type-I
(rather than type-II) superconductor. In this case the magnetic field cannot
exist in the form of magnetic flux tubes, supporting Link's observation. This
behavior of the system is due to the strong interaction between the
proton-neutron Cooper pairs, which was previously ignored. We also calculate
the critical magnetic fields H_c and H_c2 for type-I/II superconductors. These
results also support our claim of type-I superconductivity in the cores of
neutron stars.


title: Spacetime dynamics and baryogenesis in braneworld

abstract:
  We point out that the effective theory for the Randall-Sundrum braneworld
models with bulk fields contains the baryon number violation process depending
on the spacetime dynamics. Combining to the curvature-current interaction, the
net baryon number observed today may be explained. The resultant baryon to
entropy ratio is determined by the ratio of the Planck scales in four
dimensional and five dimensional spacetime except for the parameter for CP
violation.


title: Light-Front Approach for Heavy Pentaquark Transitions

abstract:
  Assuming the two diquark structure for the pentaquark state as advocated in
the Jaffe-Wilczek model, there exist exotic parity-even anti-sextet and
parity-odd triplet heavy pentaquark baryons. The theoretical estimate of
charmed and bottom pentaquark masses is quite controversial and it is not clear
whether the ground-state heavy pentaquark lies above or below the strong-decay
threshold. We study the weak transitions of heavy pentaquark states using the
light-front quark model. In the heavy quark limit, heavy-to-heavy pentaquark
transition form factors can be expressed in terms of three Isgur-Wise
functions: two of them are found to be normalized to unity at zero recoil,
while the third one is equal to 1/2 at the maximum momentum transfer, in
accordance with the prediction of the large-Nc approach or the quark model.
Therefore, the light-front model calculations are consistent with the
requirement of heavy quark symmetry. Numerical results for form factors and
Isgur-Wise functions are presented. Decay rates of the weak decays Theta_b+ to
Theta_c0 pi+ (rho+), Theta_c0 to Theta+ pi- (rho-), Sigma'_{5b}+ to
Sigma'_{5c}0 pi+ (rho+) and Sigma'_{5c}0 to N_8+ pi- (rho-) with Theta_Q,
  Sigma'_{5Q} and N_8 being the heavy anti-sextet, heavy triplet and light
octet pentaquarks, respectively, are obtained. For weakly decaying Theta_b+ and
Theta_c0, the branching ratios of Theta_b+ to Theta_c0 pi+, Theta_c0 to Theta+
pi- are estimated to be at the level of 10^{-3} and a few percents,
respectively.


title:
Branching ratios of $B^+ \to D^{(*)+}K^{(*)0}$ decays in perturbative
  QCD approach

abstract:
  We study the rare decays $B^+ \to D^{(*)+}K^{(*)0}$, which can occur only via
annihilation type diagrams in the standard model. We calculate all of the four
modes, $B \to PP, VP, PV, VV$, in the framework of perturbative QCD approach
and give the branching ratios of the order about $10^{-6}$.


title: Prethermalization

abstract:
  Prethermalization of the equation of state and the kinetic temperature to
their equilibrium values occurs on time scales dramatically shorter than the
thermal equilibration time. This is a crucial ingredient for the understanding
of collisions of heavy nuclei or other nonequilibrium phenomena in complex
quantum and classical many body systems. We also compare the chemical
equilibration time with other characteristic time scales.


title: A model realisation of the Jaffe-Wilczek correlation for pentaquarks

abstract:
  We discuss a realisation of the pentaquark structure proposed by Jaffe and
Wilczek within a simple quark model with colour-spin contact interactions and
coloured harmonic confinement, which accurately describes the $\Delta-N$
splitting. In this model spatially compact diquarks are formed in the
pentaquark but no such compact object exists in the nucleon. The colour-spin
attraction brings the Jaffe-Wilczek-like state down to a low mass, compatible
with the experimental observation and below that of the naive ground state with
all $S$-waves. We find, however, that although these trends are maintained, the
extreme effects observed do not survive the required ``smearing'' of the delta
function contact interaction. We also demonstrate the weakness of the
``schematic'' approximation when applied to a system containing a $P$-wave. An
estimate of the anti-charmed pentaquark mass is made which is in line with the
Jaffe-Wilczek prediction and significantly less than the value reported by the
H1 collaboration.


title:
Type II See-Saw Mechanism, Deviations from Bimaximal Neutrino Mixing and
  Leptogenesis

abstract:
  A possible interplay of both terms in the type II see-saw formula is
illustrated by presenting a novel way to generate deviations from exact
bimaximal neutrino mixing. In type II see-saw mechanism with dominance of the
non-canonical SU(2)_L triplet term, the conventional see-saw term can give a
small contribution to the neutrino mass matrix. If the triplet term corresponds
to the bimaximal mixing scheme in the normal hierarchy, the small contribution
of the conventional see-saw term naturally generates non-maximal solar neutrino
mixing. Atmospheric neutrino mixing is also reduced from maximal, corresponding
to 1 - \sin^2 2 \theta_{23} of order 0.01. Also, small but non-vanishing U_{e3}
of order 0.001 is obtained. It is also possible that the \Delta m^2 responsible
for solar neutrino oscillations is induced by the small conventional see-saw
term. Larger deviations from zero U_{e3} and from maximal atmospheric neutrino
mixing are then expected. This scenario links the small ratio of the solar and
atmospheric \Delta m^2 with the deviation from maximal solar neutrino mixing.
We comment on leptogenesis in this scenario and compare the contributions to
the decay asymmetry of the heavy Majorana neutrinos as induced by themselves
and by the triplet.


title:
Limits on the Dipole Moments of the $\tau$-Lepton via the Process
  $e^{+}e^{-}\to \tau^+ \tau^- \gamma in a Left-Right Symmetric Model

abstract:
  Limits on the anomalous magnetic moment and the electric dipole moment of the
$\tau$ lepton are calculated through the reaction $e^{+}e^{-}\to \tau^+ \tau^-
\gamma$ at the $Z_1$-pole and in the framework of a left-right symmetric model.
The results are based on the recent data reported by the L3 Collaboration at
CERN LEP. Due to the stringent limit of the model mixing angle $\phi$, the
effect of this angle on the dipole moments is quite small.


title:
A comprehensive description of multiple observables in heavy-ion
  collisions at SPS

abstract:
  Combining and expanding on work from previous publications, a model for the
evolution of ultrarelativistic heavy-ion collisions at the CERN SPS for 158
AGeV beam energy is presented. Based on the assumption of thermalization and a
parametrization of the space-time expansion of the produced matter, this model
is able to describe a large set of observables including hadronic momentum
spectra, correlations and abundancies, the emission of real photons, dilepton
radiation and the suppression pattern of charmonia. Each of these obervables
provides unique capabilities to study the reaction dynamics and taken together
they form a strong and consistent picture of the evolving system. Based on the
emission of hard photons, we argue that a strongly interacting, hot and dense
system with temperatures above 250 MeV has to be created early in the reaction.
Such a system is bound to be different from hadronic matter and likely to be a
quark-gluon plasma, and we find that this assumption is in line with the
subsequent evolution of the system that is reflected in other observables.


title: Pion form factor and QCD sum rules: case of axial current

abstract:
  We present an analysis of QCD sum rules for pion form factor in
next-to-leading order of perturbation theory for the case of axial-vector pion
currents. The theoretical predictions for Q^2-dependence of pion form factor
are in good agreement with available experimental data. It is shown, that NLO
corrections are large in this case and should be taken into account in rigorous
theoretical analysis.


title: Radiative neutron beta-decay in effective field theory

abstract:
  We consider radiative \beta--decay of the neutron in heavy baryon chiral
perturbation theory, with an extension including explicit \Delta degrees of
freedom. We compute the photon energy spectrum as well as the photon
polarization; both observables are dominated by the electron bremsstrahlung
contribution. Nucleon-structure effects not encoded in the weak coupling
constants g_A and g_V are determined at next-to-leading order in the chiral
expansion, and enter at the {\cal O}(0.5%)-level, making a sensitive test of
the Dirac structure of the weak currents possible.


title:
"Coulomb+linear" form of the static QCD potential in
  operator-product-expansion

abstract:
  The static QCD potential is analyzed in operator-product-expansion within
potential-NRQCD framework when r << 1/Lambda_{QCD}. We show that the leading
short-distance contribution to the potential, defined as a perturbatively
computable Wilson coefficient, can be expressed, up to O(r^2), as a
``Coulomb+linear'' potential. It coincides with the ``Coulomb+linear''
potential obtained previously from the renormalon-dominance hypothesis.
Non-perturbative contributions are of order r^2 and subleading.


title:
CP violation in selectron cascade decays e_L -> e X_2^0 -> e X_1^0 mu+
  mu-

abstract:
  Selectron decays constitute a source of 100% polarised neutralinos, whose
helicity is fixed by the charge and "chirality" of the decaying selectron. In
SUSY scenarios where the second neutralino X_2^0 has three-body decays, the
cascade decay e_L -> e X_2^0 -> e X_1^0 mu+ mu- provides a clean place to study
CP violation in the neutralino sector, through the analysis of CP-violating
asymmetries involving the X_2^0 spin s and the momenta of the muons. We show
that a CP-violating asymmetry in the triple product s . (p_mu- x p_mu+) could
be observable at a 800 GeV linear collider provided the gaugino mass M_1 has a
large phase at the electroweak scale. We compare our results with X_1^0 X_2^0
production, where a CP asymmetry is also observable within these scenarios.


title: Stochastic network view on hadron production

abstract:
  We demonstrate that hadron production viewed as formation of specific
stochastic network can explain in natural way the power-law distributions of
transverse mass spectra of pions found recently, which seem to substitute the
expected Boltzmann statistical factor.


title: Neutrinoless Double $\beta$-Decay

abstract:
  The neutrinoless double $\beta$-decay is reviewed. Model independent evidence
in favor of neutrino masses and mixing is briefly summarized. The data of the
recent experiments on the search for $0\nu\beta\beta$-decay are presented and
some future experiments are discussed. The possible values of the effective
Majorana mass, which can be predicted on the basis of the neutrino oscillation
data under different assumptions on the pattern of the neutrino mass spectrum,
are considered. A possible model independent test of the nuclear matrix element
calculations is discussed.


title:
Comment on "Search for periodic modulations of the solar neutrino flux
  in Super-Kamiokande" by J. Yoo et al

abstract:
  We comment on a recent article by Yoo et al. that presents an analysis of
Super-Kamiokande 10-day and 5-day data, correcting certain errors in that
article. We also point out that, in using the Lomb-Scargle method of power
spectrum analysis, Yoo et al. ignore much of the relevant data. A likelihood
analysis, that can take account of all of the relevant data, yields evidence
indicative of modulation by solar processes.


title: Sneutrino Inflation

abstract:
  The seesaw model of neutrinos might explain the size, age, flatness and
near-homogeneity of the Universe via sneutrino inflation, as well as explaining
the origin of matter via leptogenesis. The sneutrino inflation hypothesis makes
specific, testable predictions for cosmic microwave background observables,
which are compatible with the first release of data from WMAP, and for
flavour-violating charged-lepton decays. In particular, mu -> e gamma should
occur with a branching ratio very close to the present experimental upper
limit, whilst tau -> mu gamma and e gamma should occur further below the
present limits.


title: A black hole solution to the cosmological monopole problem

abstract:
  We propose a solution to the cosmological monopole problem: Primordial black
holes, produced in the early universe, can accrete magnetic monopoles before
the relics dominate the energy density of the universe. These small black holes
quickly evaporate and thereby convert most of the monopole energy density into
radiation. We estimate the range of parameters for which this solution is
possible: under very conservative assumptions we find that the black hole mass
must be less than 10^9 gm.


title:
Radiative and semi-leptonic B-meson decay spectra: Sudakov resummation
  beyond logarithmic accuracy and the pole mass

abstract:
  The inclusive spectra of radiative and semi-leptonic B-meson decays near the
endpoint is computed taking into account renormalons in the Sudakov exponent
(Dressed Gluon Exponentiation). In this framework we demonstrate the
factorization of decay spectra into hard, jet and soft functions and discuss
the universality of the latter two. Going beyond perturbation theory the soft
function, which we identify as the longitudinal momentum distribution in an
on-shell b quark, is replaced by the b-quark distribution in the B meson. The
two differ by power corrections. We show how the resummation of
running-coupling effects can be used to perform consistent separation to power
accuracy between perturbative and non-perturbative contributions. In
particular, we prove that the leading infrared renormalon ambiguity in the
Sudakov exponent cancels against the one associated with the definition of the
pole mass. This cancellation allows us to identify the non-perturbative
parameter that controls the shift of the perturbative spectrum in the
heavy-quark limit as the mass difference between the meson and the quark.


title: Phase Structure of Non-Compact QED3 and the Abelian Higgs Model

abstract:
  We review the phase structure of a three-dimensional, non-compact Abelian
gauge theory (QED3) as a function of the number $N$ of 4-component massless
fermions. There is a critical $N_{c}$ up to which there is dynamical fermion
mass generation and an associated global symmetry breaking. We discuss various
approaches to the determination of $N_c$, which lead to estimates ranging from
$N_c =1$ to $N_c =4$. This theory with N=2 has been employed as an effective
continuum theory for the 2D quantum antiferromagnet where the observed Neel
ordering corresponds to dynamical fermion mass generation. Thus the value of
$N_c$ is of some physical interest. We also consider the phase structure of the
model with a finite gauge boson mass (the Abelian Higgs model).


title: Electron to Muon Conversion in Low-Energy Electron-Nucleus Scattering

abstract:
  We present an estimate of the electron to muon conversion cross section in
fixed-target elastic electron scattering. The matrix element $<\mu |
j_\mathrm{em}^\mu(0) | e>$ is calculated analytically in two scenarios
introducing suitable approximations. We consider on the one hand side the case
of three light Dirac neutrinos with CKM-type leptonic mixing and on the other
hand a typical see-saw scenario. We evaluate the coulombic contribution to the
scattering cross section in the limit of vanishing energy transfer to the
nucleus and, thus, obtain a realistic estimate for the total conversion cross
section. Although we find that in the see-saw scenario the cross section can be
enhanced by as much as twenty orders of magnitude in comparison to the Dirac
case, it is still not experimentally accessible.


title:
CP asymmetry in $B \to \phi K_S$ in a general two-Higgs-doublet model
  with fourth-generation quarks

abstract:
  We discuss the time-dependent CP asymmetry of decay $B \to \phi K_S$ in an
extension of the Standard Model with both two Higgs doublets and additional
fourth-generation quarks. We show that although the Standard Model with
two-Higgs-doublet and the Standard model with fourth generation quarks alone
are not likely to largely change the effective $\sin 2 \beta$ from the decay of
$B \to \phi K_S $, the model with both additional Higgs doublet and
fourth-generation quarks can easily account for the possible large negative
value of $\sin 2 \beta$ without conflicting with other experimental
constraints. In this model, additional large CP violating effects may arise
from the flavor changing Yukawa interactions between neutral Higgs bosons and
the heavy fourth generation down type quark, which can modify the QCD penguin
contributions. With the constraints obtained from $b \to s \bar{s} s$ processes
such as $B \to X_s \gamma$ and $\Delta m_{B_s^0}$, this model can lead to the
effective $\sin 2 \beta$ to be as large as $- 0.4$ in the CP asymmetry of $B
\to \phi K_S$.


title: Computation of Gr\"obner Bases for Two-Loop Propagator Type Integrals

abstract:
  The Gr\"obner basis technique for calculating Feynman diagrams proposed in
[O.V. Tarasov, Acta Physica Polonica, v. B29 (1998) 2655] is applied to the
two-loop propagator type integrals with arbitrary masses and momentum. We
describe the derivation of Gr\"obner bases for all integrals with 1PI
topologies and present elements of the Gr\"obner bases.


title:
Bremsstrahlung from colour charges as a source of soft particle
  production in hadronic collisions

abstract:
  It is proposed that soft particle production in hadronic collisions is
dominated by multiple gluon exchanges between partons from the colliding
hadrons, followed by radiation of hadronic clusters from the coloured partons
distributed uniformly in rapidity. This explains naturally two dominant
features of the data: (a) The linear increase of rapidity spectra in the
regions of limiting fragmentation and, (b) the proportionality between the
increasing width of the limiting fragmentation region and the height of the
central plateau.


title: Phenomenology of Twisted Moduli in Type I String Inspired Models

abstract:
  We make a first study of the phenomenological implications of twisted moduli
in type I intersecting D5-brane models, focussing on the resulting predictions
at the LHC using SOFTSUSY to estimate the Higgs and sparticle spectra. Twisted
moduli can play an important role in giving a viable string realisation of
sequestering in the limit where supersymmetry breaking comes entirely from the
twisted moduli. We focus on a particular string inspired version of gaugino
mediation in which the first two families are localised at the intersection
between D5-branes, whereas the third family and Higgs doublets are allowed to
move within the world-volume of one of the branes. The soft supersymmetry
breaking third family sfermion mass terms are then in general non-degenerate
with the first two families. We place constraints upon parameter space and
predictions of flavour changing neutral current effects. Twisted moduli
domination is studied and, as well as solving the most serious part of the SUSY
flavour problem, is shown to be highly constrained. The constraints are
weakened by switching on gravity-mediated contributions from the dilaton and
untwisted T-moduli sectors. In the twisted moduli domination limit we predict a
stop-heavy MSSM spectrum and quasi-degenerate lightest neutralino and chargino
states with wino-dominated mass eigenstates.


title: Hard-Loop Effective Action for Anisotropic Plasmas

abstract:
  We generalize the hard-thermal-loop effective action of the equilibrium
quark-gluon plasma to a non-equilibrium system which is space-time homogeneous
but for which the parton momentum distribution is anisotropic. We show that the
manifestly gauge-invariant Braaten-Pisarski form of the effective action can be
straightforwardly generalized and we verify that it then generates all n-point
functions following from collisionless gauge-covariant transport theory for a
homogeneous anisotropic plasma. On the other hand, the Taylor-Wong form of the
hard-thermal-loop effective action has a more complicated generalization to the
anisotropic case. Already in the simplest case of anisotropic distribution
functions, it involves an additional term that is gauge invariant by itself,
but nontrivial also in the static limit.


title:
Color Glass Condensate and BFKL dynamics in deep inelastic scattering at
  small x

abstract:
  The proton structure function F_2(x,Q^2) for x < 0.01 and 0.045< Q^2 < 45
GeV^2, measured in the deep inelastic scattering at HERA, can be well described
within the framework of the Color Glass Condensate.


title: Rho-meson form factors and QCD sum rules

abstract:
  We present predictions for rho-meson form factors obtained from the analysis
of QCD sum rules in next-to-leading order of perturbation theory. The radiative
corrections turn out to be sizeable and should be taken into account in
rigorous theoretical analysis.


title:
Decay constants of the pseudoscalar mesons in the framework of the
  coupled Schwinger-Dyson equation and Bethe-Salpeter equation

abstract:
  In this article, we investigate the structures of the pseudoscalar mesons
($\pi$, $K$, $D$, $D_s$, $B$ and $B_s$) in the framework of the coupled rainbow
Schwinger-Dyson equation and ladder
  Bethe-Salpeter equation with the confining effective potential (infrared
modified flat bottom potential).
  The Schwinger-Dyson functions for the $u$, $d$ and $s$ quarks are greatly
renormalized at small momentum region and the curves are steep at about
$q^2=1GeV^2$ which indicates an explicitly dynamical symmetry breaking. The
Euclidean time fourier transformed quark propagators have no mass poles in the
time-like region which naturally implements confinement. As for the $c$ and $b$
quarks, the current masses are very large, the renormalization are more tender,
however, mass poles in the time-like region are also absent. The Bethe-Salpeter
wavefunctions for those mesons have the same type (Gaussian type) momentum
dependence and center around small momentum which indicate that the bound
states exist in the infrared region. The decay constants for those pseudoscalar
mesons are compatible with the values of experimental extractions and
theoretical calculations, such as lattice simulations and QCD sum rules.


title:
Large Supersymmetric Contribution to CP Asymmetry of B_d \to \phi K_S
  from Left-Handed Squark Mixing

abstract:
  Supersymmetric contribution to the CP asymmetry of B_d \to \phi K_S is
re-examined. It is emphasized that our analysis takes into account the recently
found constraint from the mercury electric dipole moment, in addition to the
well-known constraint from the branching ratio of b \to s \gamma. We show that,
despite these constraints, the CP asymmetry can considerably deviate from the
Standard Model prediction, if the CP-odd flavor mixing comes from left-handed
squarks. Alignment mechanism of sfermion masses and mixing may imprint the
required flavor mixing at high energy scale.


title: Isomeric Lepton Mass Matrices and Bi-large Neutrino Mixing

abstract:
  We show that there exist six parallel textures of the charged lepton and
neutrino mass matrices with six vanishing entries, whose phenomenological
consequences are exactly the same. These {\it isomeric} lepton mass matrices
are compatible with current experimental data at the $3\sigma$ level. If the
seesaw mechanism and the Fukugita-Tanimoto-Yanagida hypothesis are taken into
account, it will be possible to fit the experimental data at or below the
$2\sigma$ level. In particular, the maximal atmospheric neutrino mixing can be
reconciled with a strong neutrino mass hierarchy in the seesaw case.


title:
Radiative corrections to deep-inelastic $ed-$ scattering. Case of tensor
  polarized deuteron

abstract:
  The model-independent radiative corrections to deep-inelastic scattering of
unpolarized electron beam off the tensor polarized deuteron target have been
considered. The contribution to the radiative corrections due to the
hard-photon emission from the elastic electron-deuteron scattering (the
so-called elastic radiative tail) is also investigated. The calculation is
based on the covariant parametrization of the deuteron quadrupole polarization
tensor. The numerical estimates of the radiative corrections to the
polarization observables have been done for the kinematical conditions of the
current experiment at HERA


title: Anomalous decay of pion and eta at finite temperature

abstract:
  We study the anomalous decays $\pi^0, \eta \to\gamma\gamma$ in the framework
of the three--flavor Nambu--Jona-Lasinio [NJL] model at finite temperature. The
similarities and differences between these results and those obtained at zero
temperature and finite density are discussed. In both cases the lifetimes of
these mesons decrease significantly at the critical point, although this might
not be sufficient to observe enhancement of these decays in heavy-ion
collisions.


title: Vacuum structure in 5D SO(10) GUT on $S^1/Z_2$

abstract:
  We study the vacuum structure in 5D SO(10) grand unified theory (GUT)
compactified on $S^1/Z_2$ orbifold, where SO(10) is broken into $SU(3)\times
SU(2)\times U(1)^2$ through the boundary conditions. Although a lot of people
extended to 6D to avoid massless colored particle, we can show they obtain
finite masses by the radiative corrections. In a supersymmetric case, the
fermionic partner of the zero-mode can also acquire non-vanishing mass through
the SUSY breaking effects, and the gauge coupling unification can be recovered
by use of brane localized kinetic terms.


title:
CP sensitive observables in chargino production with transverse
  $e^{\pm}$ beam polarization

abstract:
  We consider the process $e^+e^-\to\ti\chi^+_i\ti\chi^-_j$ at a linear
collider with transverse $e^{\pm}$ beam polarization. We investigate the
influence of the CP phases on azimuthal asymmetries in
$e^+e^-\to\ti\chi^+_i\ti\chi^-_j$ with subsequent two-body decays
$\ti\chi^-_j\to \ti\nu_{\ell}\ell^-$ and $\ti\chi^-_j\to W^-\ti\chi^0_1$. We
show that triple product correlations involving the transverse $e^{\pm}$ beam
polarization vanish if at least one subsequent chargino decay is not observed.
We derive this result within the Minimal Supersymmetric Standard Model (MSSM)
with complex parameters, however, it holds also in the general MSSM with SUSY
flavour violation.


title:
Power corrections to the process $\gamma^{*}\gamma \to \pi\pi$ in the
  running coupling method

abstract:
  Power-suppressed corrections coming from the end-point integration regions in
the amplitude of the process $\gamma^{*}\gamma \to \pi \pi$ at large $Q^2$ and
small squared center-of-mass energy $W^2$ are calculated in the QCD
hard-scattering approach where the amplitudes factorize in a hard
perturbatively calculable part and a generalized distribution amplitude. The
running coupling method and the technique of infrared renormalon calculus are
applied to obtain Borel resummed expressions for the two main components of the
process amplitude. Numerical estimates for these power corrections are
presented. They are sizeable when $Q^2 < 10 GeV^2$.


title: Graviton-induced Bremsstrahlung at e^+e^- colliders

abstract:
  We consider graviton-induced Bremsstrahlung at future e^+e^- colliders in
both the ADD and RS models, with emphasis on the photon perpendicular momentum
and angular distribution. The photon spectrum is shown to be harder than in the
Standard Model, and there is an enhancement for photons making large angles
with respect to the beam. In the ADD scenario, the excess at large photon
perpendicular momenta should be measurable for values of the cut-off up to
about twice times the c.m. energy. In the RS scenario, radiative return to
graviton resonances below the c.m. energy can lead to large enhancements of the
cross section.


title: Matching Regge Theory to the OPE

abstract:
  The spectra of masses and decay constants for non-strange meson resonances in
the energy range 0--2.5 GeV is analyzed. It is known from meson phenomenology
that for given quantum numbers these spectra approximately follow linear
trajectories with a universal slope. These facts can be understood in terms of
an effective string description for QCD. For light meson states the
trajectories deviate noticeably from the linear behavior. We investigate the
possible corrections to the linear trajectories by matching two-point
correlators of quark currents to the Operator Product Expansion (OPE). We find
that the allowed modifications to the linear Regge behavior must decrease
rapidly with the principal quantum number. After fitting the lightest states in
each channel and certain low-energy constants the whole spectrum for meson
masses and residues is obtained in a satisfactory agreement with phenomenology.
We briefly speculate on possible implications for the QCD effective string.


title: One-loop weak corrections to three-jet observables at the Z pole

abstract:
  We briefly illustrate the impact of the genuinely weak one-loop virtual terms
of the ${\cal O}(\alpha_{\rm S}\alpha_{\rm EW}^3)$ factorisable corrections to
the three-jet cross section at $\sqrt s=M_Z$. Their importance for the
measurement of $\alpha_{\rm S}$ at GigaZ luminosities is emphasised


title: A New Algorithm for Inclusive Search of SUSY Signal

abstract:
  A new algorithm designed to reduce the model dependence in future SUSY
searches at the LHC is described. This algorithm can dynamically adapt itself
to a wide range of possible SUSY final states thus reducing the need for
detailed model-driven analysis. Preliminary study of its performance on
simulated MSSM, GMSB and AMSB final states is described, and a comparison with
traditional search procedures, whenever available, is performed.


title:
Jet Azimuthal Correlations and Parton Saturation in the Color Glass
  Condensate

abstract:
  We consider the influence of parton saturation in the Color Glass Condensate
on the back-to-back azimuthal correlations of high $p_T$ hadrons in $pA$ (or
$dA$) collisions. When both near--side and away--side hadrons are detected at
mid-rapidity at RHIC energy, the effects of parton saturation are constrained
to transverse momenta below the saturation scale $p_T \leq Q_s$; in this case
the back-to-back correlations do not disappear but exhibit broadening. However
when near-side and away-side hadrons are separated by several units of
rapidity, quantum evolution effects lead to the depletion of back-to-back
correlations as a function of rapidity interval between the detected hadrons
(at fixed $p_T$). This applies to both $pp$ and $pA$ (or $dA$) collisions;
however, due to the initial conditions provided by the Color Glass Condensate,
the depletion of the back-to-back correlations is significantly stronger in the
$pA$ case. An experimental study of this effect would thus help to clarify the
origin of the high $p_T$ hadron suppression at forward rapidities observed
recently at RHIC.


title:
Protecting the primordial baryon asymmetry in the $SU(2)_{L}$ triplet
  Higgs model compatible with KamLAND and WMAP

abstract:
  We find the condition that the primordial baryon asymmetry is not washed out
in the $SU(2)_{L}$ triplet Higgs model by solving the Boltzmann equation. We
further require that the model is compatible with the recent results of the
neutrino oscillation experiments and WMAP, and the constraints on the $\rho$
parameter imposed by the LEP. We finally obtain the allowed region of the
parameters in the model.


title: Curvatons in the minimally supersymmetric standard model

abstract:
  Curvaton is an effectively massless field whose energy density during
inflation is negligible but which later becomes dominant. This is a novel
mechanism to generate the scale invariant perturbations. I discuss the
possibility that the curvaton could be found among the fields of the minimally
supersymmetric standard model (MSSM), which contains a number of flat
directions along which the renormalizable potential vanishes. The requirements
of late domination and the absence of damping of the perturbations pick out
essentially a unique candidate for the MSSM curvaton. One must also require
that inflation takes place in a hidden sector. If the inflaton energy density
can be radiated into extra dimensions, many constraints can be relaxed, and the
simplest flat direction consisting of the Higgses H_u and H_d would provide a
working example of an MSSM curvaton.


title: Interferometry of direct photons in Pb+Pb collisions at 158 AGeV

abstract:
  We present final results from the WA98 experiment which provide first
measurements of Bose-Einstein correlations of direct photons in
ultrarelativistic heavy ion collisions. Invariant interferometric radii were
extracted in the range $100<K_T<300$ MeV/c and compared to interferometric
radii of charged pions. The yield of direct photons for $100<p_T<300$ MeV/c was
extracted from the correlation strength parameter and compared to the yield of
direct photons measured in WA98 at higher $p_T$ with the statistical
subtraction method, and to predictions of a fireball model.


title:
An Analysis of the Time-Dependent CP Asymmetry in $B \to \pi \pi$ Decays
  in the Standard Model

abstract:
  Measurements of the time-dependent CP asymmetry in the decay $B^0_d (t) \to
\pi^+ \pi^-$ and its charge conjugate by the BELLE and BABAR collaborations
currently yield $C_{\pi \pi}^{+-} = -0.46 \pm 0.13$ and $S_{\pi \pi}^{+-} =
-0.74 \pm 0.16$, characterizing the direct and mixing-induced CP asymmetries,
respectively. We study the implication of these measurements on the CKM
phenomenology taking into account the available information in the quark mixing
sector. Our analysis leads to the results that the ratio $|P_c/T_c|$ involving
the QCD-penguin and tree amplitudes and the related strong phase difference
$\delta_c = \delta_c^P - \delta_c^T$ in the $B^0_d/\bar{B}_d^0 \to \pi^+ \pi^-$
decays are quite substantial. Using the isospin symmetry to constrain
$|P_c/T_c|$ and $\cos (2\theta)$, where $2 \theta$ parameterizes the
penguin-induced contribution, we present a fit of the current data including
the measurements of $S_{\pi\pi}^{+-}$ and $C_{\pi\pi}^{+-}$. Our best-fits
yield: $\alpha = 92^\circ$, $\beta = 24^\circ$, $\gamma = 64^\circ$, $|P_c/T_c|
= 0.77$, and $\delta_c = -43^\circ$. At 68% C.L., the ranges are: $81^\circ
\leq \alpha \leq 103^\circ$, $21.9^\circ \leq \beta \leq 25.5^\circ$, $54^\circ
\leq \gamma \leq 75^\circ$, $0.43 \leq |P_c/T_c| \leq 1.35$ and $-64^\circ \leq
\delta_c \leq -29^\circ$. Currently {\it en vogue} dynamical approaches to
estimate the hadronic matrix elements in $B \to \pi\pi$ decays do not provide a
good fit of the current data.


title: Parity in left-right symmetric models

abstract:
  We considered parity breaking in some left-right symmetric models. We studied
spontaneous and explicit parity violation in two cases with doublet and triplet
Higgs scalars. The minimization condition in these two cases differ
significantly. A comparative study of these models is presented emphasizing
their phenomenological consequences.


title: Spectator interactions in B -> V gamma decays and QCD factorisation

abstract:
  We study the radiative decays B -> V gamma (where V=rho, K^*) in the
framework of QCD factorisation, and in particular the hard-spectator
contributions to the decay amplitudes. For the phenomenologically significant
chromomagnetic operator, we show by an explicit next-to-leading-order
computation that the spectator interactions factorise in the heavy-quark limit,
i.e. that they can be written as the convolution of a hard-scattering kernel,
computable in perturbation theory, and of the light-cone distribution
amplitudes for the B and V mesons which contain the soft physics. The presence
of an intermediate scale of order sqrt{Lambda_QCD M_B} leads to the presence of
Sudakov logarithms. We indicate how the proof of factorisation can be extended
to other (four-quark) operators.


title: The Simplest Neutrino Mass Matrix

abstract:
  We motivate the simplest ansatz for the neutrino mass matrix consistent with
the data from neutrino oscillation experiments, and admitting CP violation. It
has only two free parameters: an arbitrary mass-scale and a small dimensionless
ratio. This mass matrix exhibits two symmetries, Democracy and Mutativity,
which respectively ensure trimaximal mixing of the |nu_2> mass eigenstate, and
mixing parameter values |theta_{23}|=45 degrees and |delta|=90 degrees,
consistent with bimaximal mixing of the |nu_3> mass eigenstate. A third
constraint relates the smallness of |U_{e3}|^2 to that of the mass-squared
difference ratio, Delta m^2_sol/Delta m^2_atm, yielding the prediction
sin(theta_{13})=sqrt{2 Delta m^2_sol/3 Delta m^2_atm} ~ 0.13 +- 0.03.


title: Screening of a Moving Parton in the Quark-Gluon Plasma

abstract:
  The screening potential of a parton moving through a quark-gluon plasma is
calculated using the semi-classical transport theory. An anisotropic potential
showing a minimum in the direction of the parton velocity is found. As
consequences possible new bound states and J/psi dissociation are discussed.


title:
B_{c} and heavy meson spectroscopy in the local approximation of the
  Schrodinger equation with relativistic kinematics

abstract:
  We present bound state masses of the self-conjugate and non-self-conjugate
mesons in the context of the Schr\"{o}dinger equation taking into account the
relativistic kinematics and the quark spins. We apply the usual interaction by
adding the spin dependent correction. The pseudoscalar and vector decay
constants of the $B_{c}$ meson and the unperturbed radial wave function at the
origin are also calculated. We have obtained a local equation with a complete
relativistic corrections to a class of three attractive static interaction
potentials of the general form $% V(r)=-Ar^{-\beta}+\kappa r^{\beta}+V_{0},$
with $\beta =1,1/2,~3/4$ which can also be decomposed into scalar and vector
parts in the form $% V_{V}(r)=-Ar^{-\beta}+(1-\epsilon)\kappa r^{\beta}$ and $%
V_{S}(r)=\epsilon \kappa r^{\beta}+V_{0};$ where $0\leq \epsilon \leq 1.$ The
energy eigenvalues are carried out up to the third order approximation using
the shifted large-N-expansion technique.


title: Gravitational Leptogenesis and Neutrino Mass Limit

abstract:
  Recently Davoudiasl {\it et al} \cite{steinhardt} have introduced a new type
of interaction between the Ricci scalar $R$ and the baryon current $J^{\mu}$,
${\partial_\mu R} J^{\mu}$ and proposed a mechanism for baryogenesis, the
gravitational baryogenesis. Generally, however, $\partial_{\mu} R$ vanishes in
the radiation dominated era. In this paper we consider a generalized form of
their interaction, $\partial_{\mu}f(R)J^{\mu}$ and study again the possibility
of gravitational baryo(lepto)genesis. Taking $f(R)\sim \ln R$, we will show
that $\partial_{\mu}f(R)\sim \partial_{\mu} R/R$ does not vanish and the
required baryon number asymmetry can be {\it naturally} generated in the early
universe.


title:
Polarized lepton pair forward-backward asymmetries in (B -> K^* l^+ l^-)
  decay beyond the standard model

abstract:
  We study the polarized lepton pair forward-backward asymmetries in (B -> K^*
l^+ l^-) decay using a general, model independent form of the effective
Hamiltonian. We present the general expression for nine double-polarization
forward-backward asymmetries. It is shown that, the study of the
forward-backward asymmetries of the doubly-polarized lepton pair is a very
useful tool for establishing new physics beyond the standard model.


title: Non-oscillating neutrinos in vacuum

abstract:
  Demonstration of how matter effects can result into non-oscillating neutrinos
in vacuum, after they have passed through an appropriate distribution of
matter.
  A brief discussion about matter effects in neutrinos oscillation is also
made.


title:
What Can we Learn about $\Theta$ Baryon from Unified Picture for Hadron
  Spectra

abstract:
  An analysis of the recent results from several experimental groups reported
observation of a new $\Theta$ baryon has been presented from a view point of
the unified picture for hadron spectra developed early \cite{12}. It is shown
that, in fact, two different $\Theta$ baryons have been discovered. We have
also established that both $\Theta$ baryons are excellently incorporated in the
unified picture for hadron spectra. It is argued that the presented
experimental material revealed an existence of the positive srangeness $\Theta$
partners for the observed $\Lambda$ and $\Sigma$ states with negative
strangeness as we predicted.


title: Neutrino oscillations from the splitting of Fermi points

abstract:
  As was shown previously, oscillations of massless neutrinos may be due to the
splitting of multiply degenerate Fermi points. In this Letter, we give the
details and propose a three-flavor model of Fermi point splittings and neutrino
mixings with only two free parameters. The model may explain recent
experimental results from the K2K and KamLAND collaborations. There is also
rough agreement with the data on atmospheric neutrinos (SuperK) and solar
neutrinos (SNO), but further analysis is required. Most importantly, the Ansatz
allows for relatively strong T-violating (CP-nonconserving) effects in the
neutrino sector.


title: Fermion mixings vs d=6 proton decay

abstract:
  It is well known, although sometimes ignored, that not only the d=5 but also
d=6 proton decay depends on fermion mixings. In general we study carefully the
dependence of d=6 decay on fermion mixings using the effective operator
approach. We find that without specifying a theory it is impossible to make
clear predictions. Even in a given model, it is often not possible to determine
all the physical parameters. We point out that it is possible to make a clear
test of any grand unified theory with symmetric Yukawa couplings. We discuss in
some detail realistic theories based on SU(5) and SO(10) gauge symmetry.


title: Correlated bounds on CP asymmetries in $B^0 \to \eta' K_S$

abstract:
  Flavor SU(3) is used to constrain the coefficients of $\sin\Delta mt$ and
$\cos\Delta mt$ in the time-dependent CP asymmetry of $B^0 \to \eta' K_S$.
Correlated bounds in the $(S_{\eta' K}, C_{\eta' K})$ plane are derived, by
using recent rate measurements of $B^0$ decays into $K^+ K^-, \pi^0\pi^0,
\pi^0\eta, \pi^0\eta', \eta\eta, \eta\eta', \eta'\eta'$. Stringent bounds are
obtained when assuming a single SU(3) singlet amplitude and when neglecting
annihilation-type amplitudes.


title: Weakly coupled neutral gauge bosons at future linear colliders

abstract:
  A weakly coupled new neutral gauge boson forms a narrow resonance that is
hard to discover directly in e+e- collisions. However, if the gauge boson mass
is below the center-of-mass energy, it can be produced through processes where
the effective energy is reduced due to initial-state radiation and
beamstrahlung. It is shown that at a high-luminosity linear collider, such a
gauge boson can be searched for with very high sensitivity, leading to a
substantial improvement compared to existing limits from the Tevatron and also
extending beyond the expected reach of the LHC in most models. If a new vector
boson is discovered either at the Tevatron Run II, the LHC or the linear
collider, its properties can be determined at the linear collider with high
precision, thus helping to reveal origin of the new boson.


title:
Remark on the core/halo model of Bose-Einstein correlations in multiple
  particle production processes

abstract:
  The core/halo model describes the Bose-Einstein correlations in multihadron
production taking into account the effects of long-lived resonances. The model
contains the combinatorial coefficients alpha_j which were originally
calculated from a recurrence relation. We show that alpha_j is the integer
nearest to j!/e.


title:
Singular behavior of ^1P_1^{+-} quarkonium and positronium annihilation
  decays and relevance of relative energy

abstract:
  Using a four dimensional approach, we show that the singularities for small
gluon momenta, which arise in the usual three dimensional treatment of the
annihilation decay, disappear if all poles in the relative energy are taken
into account correctly in the integration. We obtain an explicit formula for
the decay width which involves a non locality originating from the kinetic
energy. We calculate not only the familiar logarithmic dependence on the
binding energy, but also the constant to be added to the logarithm. For
positronium this differs from an earlier result in the literature and leads to
a modified life time. In QCD there is a non abelian loop graph which
contributes to the decay amplitude to the same order as the tree graph.
Contrary to the original version, which contained some errors, the constant
turns out to be large and negative.
  For reasonable parameters, this negative constant practically cancels the
positive logarithm, so that the whole approach of expanding with respect to the
binding energy breaks down.


title: Neutrino mass, dark matter and inflation

abstract:
  We show that spontaneous breaking of global $B-L$ symmetry responsible for
small neutrino masses via the seesaw mechanism provides a unified picture of
hybrid inflation and dark matter if the scale of $B-L$ breaking is close to the
GUT scale. The majoron which acquires a small mass in the milli-eV range due to
Planck scale breaking of $B-L$ is the dark matter candidate. The coupling of
the majoron field to the neutrino induces a small violation of CPT and Lorentz
invariance at the present epoch. We discuss some of the phenomenological and
cosmological implications of the model.


title: Solving Skyrmions

abstract:
  We find exact solutions for Skyrmions for the Skyrme-like models.
Constructing first the recursion formulae at small and large distance behavior,
we proceed by implementing these constraints to a chosen parametrization of the
solutions. The procedure is applied to the spherically symmetric hedgehog
solution and to topological number N > 1 solutions based on rational maps.


title: Neutrino-nucleus interaction rates at a low-energy beta-beam facility

abstract:
  We compute the neutrino detection rates to be expected at a low-energy
beta-beam facility. We consider various nuclei as neutrino detectors and
compare the case of a small versus large storage ring.


title: New inflation, preinflation, and leptogenesis

abstract:
  We present a new inflation model in which the inflationary scenario including
subsequent reheating is determined in part by a U(1)_R\times Z_n symmetry. A
preinflation epoch can be introduced to yield, among other things, a running
spectral index indicated by the WMAP analysis. The inflaton decay into right
handed neutrinos, whose masses can be hierarchical because of the Z_n symmetry,
leads to a reheat temperature >~10^8 GeV (~10^4-10^6 GeV in some cases),
followed by non-thermal leptogenesis.


title: Are the anti-charmed and bottomed pentaquarks molecular heptaquarks?

abstract:
  I study the charmed $uudd\bar c$ resonance D*p (3100) very recently
discovered by the H1 collaboration at Hera. An anticharmed resonance was
already predicted, in a recent publication mostly dedicated to the S=1
resonance Theta+(1540). To confirm these recent predictions, I apply the same
standard quark model with a quark-antiquark annihilation constrained by chiral
symmetry. I find that repulsion excludes the D*p (3100) as a $uudd\bar c$
s-wave pentaquark. I explore the D*p (3100) as a heptaquark, equivalent to a
N-pi-D* linear molecule, with positive parity and total isospin I=0. I find
that the N-D repulsion is cancelled by the attraction existing in the N-pi and
pi-D channels. In our framework this state is harder to bind than the Theta+
described by a k-pi-N borromean bound-state, a lower binding energy is expected
in agreement with the H1 observation. Multiquark molecules N-pi-D, N-pi-B* and
N-pi-B are also predicted.