title: Electromagnetic effects of neutrinos in an electron gas

abstract:
  We study the electromagnetic properties of a system that consists of an
electron background and a neutrino gas that may be moving or at rest, as a
whole, relative to the background. The photon self-energy for this system is
characterized by the usual transverse and longitudinal polarization functions,
and two additional ones which are the focus of our calculations, that give rise
to birefringence and anisotropic effects in the photon dispersion relations.
Expressions for them are obtained, which depend on the neutrino number
densities and involve momentum integrals over the electron distribution
functions, and are valid for any value of the photon momentum and general
conditions of the electron gas. Those expressions are evaluated explicitly for
several special cases and approximations which are generally useful in
astrophysical and cosmological settings. Besides studying the photon dispersion
relations, we consider the macroscopic electrodynamic equations for this
system, which involve the standard dielectric and permeability constants plus
two additional ones related to the photon self-energy functions. As an
illustration, the equations are used to discuss the evolution of a magnetic
field perturbation in such a medium. This particular phenomena has also been
considered in a recent work by Semikoz and Sokoloff as a mechanism for the
generation of large-scale magnetic fields in the Early Universe as a
consequence of the neutrino-plasma interactions, and allows us to establish
contact with a specific application in a well defined context, with a broader
scope and from a very different point of view.


title: Supersymmetry, flavor physics and dark matter

abstract:
  In this talk, I first discuss $b\to d$, $b\to s$ and $s\to d$ transitions
including time-dependent CP asymmetries in $B_d \to \phi K_s$ and Re
($\epsilon^{'}/\epsilon_K$). Then I show that the decay $B_s \to \mu^+ \mu^-$
is useful to distinguish various SUSY breaking mechanisms. I will also describe
some possible connections between B physics and cosmology: (i) B physics and
electroweak baryogenesis within SUSY models, and (ii) the correlation between
the neutralino dark matter scattering and $B (B_s \to \mu^+ \mu^-)$. In
particular, we point out that the current upper bound on $B (B_s \to \mu^+
\mu^-)$ form CDF and D0 collaborations can constrain the spin-independent
neutralino scattering cross section more strongly than the CDMS bound.


title:
Total, elastic and diffractive cross sections at LHC in the
  Miettinen-Pumplin model

abstract:
  Predictions for the total, elastic and single diffractive cross sections
calculated for the LHC in the framework of the Miettinen-Pumplin model are
presented. The total cross section is expected to be 15% smaller than that
determined by Donnachie and Landshoff in the model with soft pomeron. The
diffractive cross section is almost constant in the Tevatron-LHC energy range.


title: Jet activity versus alignment

abstract:
  The hypothesis about the relation between the observed alignment of spots in
the x-ray film in cosmic ray emulsion experiments and the features of events in
which jets prevail at super high energies is tested. Due to strong dynamical
correlation between jet axis directions and that between momenta of jet
particles (almost collinearity), the evaluated degree of alignment is
considerably larger than that for randomly selected chaoticly located spots in
the x-ray film. It appears comparable with experimental data provided that the
height of primary interaction, the collision energy and the total energy of
selected clusters meet certain conditions. The Monte Carlo generator PYTHIA,
which basically well describes jet events in hadron-hadron interactions, was
used for the analysis.


title: Quantum Theory of Neutrino Spin-Light in Matter

abstract:
  The quantum theory of the spin light of neutrino ($SL\nu$) exactly accounting
for the effect of the background matter is developed. The $SL\nu$ rate and
power, and also the emitted photon's energy are obtained for the different
values of the neutrino momentum and density of matter. The spatial distribution
of the radiation power and the dependence of the emitted photon's energy on the
direction of radiation are studied. It is also shown that, in a wide range of
the neutrino momentum and densities of matter, the $SL\nu$ radiation is
characterized by nearly total circular polarization. Conditions for the
effective neutrino spin-light radiation in the electron plasma are discussed.


title:
Model-independent Limits from Spin-dependent WIMP Dark Matter
  Experiments

abstract:
  Spin-dependent WIMP searches have traditionally presented results within an
odd group approximation and by suppressing one of the spin-dependent
interaction cross sections. We here elaborate on a model-independent analysis
in which spin-dependent interactions with both protons and neutrons are
simultaneously considered. Within this approach, equivalent current limits on
the WIMP-nucleon interaction at WIMP mass of 50 GeV/c$^{2}$ are either
$\sigma_{p}\leq0.7$ pb, $\sigma_{n}\leq0.2$ pb or $|a_{p}|\leq0.4$,
$|a_{n}|\leq0.7$ depending on the choice of cross section or coupling strength
representation. These limits become less restrictive for either larger or
smaller masses; they are less restrictive than those from the traditional odd
group approximation regardless of WIMP mass. Combination of experimental
results are seen to produce significantly more restrictive limits than those
obtained from any single experiment. Experiments traditionally considered
spin-independent are moreover found to severely limit the spin-dependent phase
space. The extension of this analysis to the case of positive signal
experiments is explored.


title: The Primakoff effect on a proton target

abstract:
  Primakoff effect offers us with a way to determine the radiative decay width
of pseudo-scalar mesons when they are photo-produced in the electromagnetic
field of hadronic systems. Taking advantage of recent developments in the Regge
description of the production of mesons in the strong hadronic field, this
paper evaluates the relative importance of the electromagnetic and the strong
amplitudes, and assesses the possibilities which become opened by modern
experimental facilities.


title:
Neutrino masses, mixing and leptogenesis in a two Higgs doublet model
  for the third generation

abstract:
  We examine neutrino oscillations in a two Higgs doublet model (2HDM) in which
the second doublet couples only to the third generation right-handed
up-fermions, i.e., to t_R and to N_3 which is the heaviest right-handed
Majorana neutrino. The inherently large tan(beta) of this model can naturally
account for the large top mass and, based on a quark-lepton similarity ansatz,
when embedded into a seesaw mechanism it can also account for the observed
neutrino masses and mixing angles giving a very small \theta_{13}: -0.017 <
\theta_{13} < 0.021 at 99% CL, and a very restrictive prediction for the
atmospheric mixing angle: 42.9^0 < \theta_{atm} < 45.2^0 at 99% CL. The large
value of tan(beta) also sets the mass scale of the heaviest right-handed
Majorana neutrino N_3 and triggers successful leptogenesis through a
CP-asymmetry in the decays of the N_1 (lightest right-handed Majorana) which is
tan^2(beta) enhanced compared to the CP-asymmetry obtained in models for
leptogenesis with one Higgs doublet or in the MSSM. This enhancement allows us
to relax the lower bound on M_{N_1} and consequently also the lower bound on
the reheating temperature of the early universe.


title:
Effects of Final-state Interactions on Mixing-induced CP Violation in
  Penguin-dominated B Decays

abstract:
  Motivated by the recent indications of the possibility of sizable deviations
of the mixing-induced CP violation parameter, $S_f$, in the penguin-dominated
$b\to sq\bar q$ transition decays such as $B^0\to
(\phi,\omega,\rho^0,\eta',\eta,\pi^0,f_0)K_S$ from $\sin 2\beta$ determined
from $B\to J/\psi K_S$, we study final-state rescattering effects on their
decay rates and CP violation. Recent observations of large direct CP asymmetry
in modes such as $B^0\to K^+\pi^-,\rho^-\pi^+$ means that final state phases in
2-body B decays may not be small. It is therefore important to examine these
long-distance effects on penguin-dominated decays. Such long-distance effects
on $S_f$ are found to be generally small [i.e. ${\cal O}(1-2%)$] or negligible
except for the $\omega K_S$ and $\rho^0K_S$ modes where $S_f$ is lowered by
around 15% for the former and increased by the same percentage for the latter.
However, final-state rescattering can enhance the $\omega K_S, \phi K_S,
\eta'K_S, \rho^0K_S$ and $\pi^0K_S$ rates significantly and flip the signs of
direct CP asymmetries of the last two modes. Direct CP asymmetries in $\omega
K_S$ and $\rho^0K_S$ channels are predicted to be $\A_{\omega K_S}\approx
-0.13$ and $\A_{\rho^0K_S}\approx 0.47$, respectively. However, direct CP
asymmetry in all the other $b\to s$ penguin dominated modes that we study is
found to be rather small (a few percents), rendering these modes a viable place
to search for the CP-odd phases beyond the standard model.


title: Mixing of Pentaquark and Molecular States

abstract:
  There are experimental evidences for the existence of narrow states
$\Theta^+$ and $\Theta_c$ with the same quantum numbers of $uudd\bar s$ and
$uudd\bar c$ pentaquarks and also $NK^{(*)}$ and $ND^{(*)}$ molecular states.
Their masses deviate from many theoretical estimates of the pure pentaquark and
molecular states. In this work we study the possibility that the observed
$\Theta^+$ and $\Theta_c$ are mixtures of pure pentaquark and molecular states.
The mixing parameters are in general related to non-perturbative QCD which are
not calculable at present. We determine them by fitting data from known states
and then generalize the mechanism to $\Theta_b$ to predict its mass and width.
The mixing mechanism can also naturally explain the narrow width for $\Theta^+$
and $\Theta_c$ through destructive interferences, even if the pure pentaquark
and molecular states have much larger decay widths. We also briefly discuss the
properties of the partner eigenstates of $\Theta^+$ and $\Theta_c$ and the
possibility of experimentally observe them. Moreover, probable consequences of
multi-state mixing are also addressed.


title: Reverse the force direction at long distance by a running coupling

abstract:
  We reveal that a suitable running coupling $\alpha(q^2)$ can reverse the
direction of the one-particle-exchange (OPE) force at long distance if (and
under general assumptions, only if) the exchanged particle has a mass $m$,
either intrinsic or effective. The essential requirement on $\alpha(q^2)$ is an
extrapolating restriction $\alpha (-m^2)<0$. The running of $\alpha(q^2)$ can
be from either renormalization-group evolution or certain derivatives in the
Lagrangian. Reversal of the OPE force direction at long distance (namely,
attraction transits to repulsion, or vice versa) may have important
implications for gravity and cosmic acceleration, particle and nuclear physics,
and also condensed matter properties such as superconductivity.


title: Di-hadron correlations at ISR and RHIC energies

abstract:
  The structure of hadron-hadron correlations is investigated in proton-proton
collisions.We focus on the transmission of the initial transverse momenta of
partons (``intrinsic $k_T$'') to the hadron-hadron correlations. Values of the
intrinsic transverse momentum obtained from experimental correlations are
compared to the results of a model with partially randomized parton transverse
momenta at ISR and RHIC energies. Procedures for extracting the correlations
from data are discussed.


title: B-Meson Distribution Amplitudes of Geometric Twist vs. Dynamical Twist

abstract:
  Two- and three-particle distribution amplitudes of heavy pseudoscalar mesons
of well-defined geometric twist are introduced. They are obtained from
appropriately parametrized vacuum-to-meson matrix elements by applying those
twist projectors which determine the enclosed light-cone operators of definite
geometric twist and, in addition, observing the heavy quark constraint.
Comparing these distribution amplitudes with the conventional ones of dynamical
twist we derive relations between them, partially being of Wandzura-Wilczek
type; also sum rules of Burkhardt-Cottingham type are derived.The derivation is
performed for the (double) Mellin moments and then re-summed to the non-local
distribution amplitudes. Furthermore, a parametrization of vacuum-to-meson
matrix elements for non-local operators off the light-cone in terms of
distribution amplitudes accompanying independent kinematical structures is
derived.


title: Nonfactorizable $B\to\chi_{c0}K$ decay and QCD factorization

abstract:
  We study the unexpectedly large rate for the factorization-forbidden decay
$B\to \chi_{c0}K$ within the QCD factorization approach. We use a non-zero
gluon mass to regularize the infrared divergences in vertex corrections. The
end-point singularities arising from spectator corrections are regularized and
carefully estimated by the off-shellness of quarks. We find that the
contributions arising from the vertex and leading-twist spectator corrections
are numerically small, and the twist-3 spectator contribution with chiral
enhancement and linear end-point singularity becomes dominant. With reasonable
choices for the parameters, the branching ratio for $B\to\chi_{c0}K$ decay is
estimated to be in the range $(2-4)\times 10^{-4}$, which is compatible with
the Belle and BaBar data.


title: Contribution of Ue3 to geo-neutrino flux

abstract:
  We show that a non-zero Ue3 close to the CHOOZ bound ($Sin^2 2 \theta_{13}
\simeq 0.16$ 90% CL) can change the geo-neutrino flux by 12%. Geo-neutrino
detection in Kamland with a exposure of $3 \times 10^{32} proton-years$ is
sensitive to $Sin^2 2 \theta_{13}$ to the level of $0.2 (1 \sigma)$. For the
same exposure a detector close to Himalayas can probe $Sin^2 2 \theta_{13}$
down to $0.15 (1 \sigma)$ due to higher geo-neutrino flux from the Tibetan
plate.


title: Topcolor model in extra dimensions and nontrivial boundary conditions

abstract:
  The nontrivial boundary conditions for the Topcolor breaking are investigated
in the context of the TeV-scale extra dimension scenario. We present a six
dimensional model where the top and bottom quarks in the bulk have the Topcolor
charge while the other quarks in the bulk do not. We also put the electroweak
gauge interaction in the six dimensional bulk. Then the bottom quark
condensation is naturally suppressed owing to the power-like running of the
bulk $U(1)_Y$ interaction, so that only the top condensation is expected to
take place. We explore such a possibility based on the ladder Schwinger-Dyson
equation and show the cutoff to make the model viable.


title:
High energy amplitude in the dipole approach with Pomeron loops:
  asymptotic solution

abstract:
  In this paper an analytical solution for the high energy scattering amplitude
is suggested. This solution has several unexpected features:(i) the asymptotic
amplitude is a function of dipole sizes and, therefore, this amplitude shows
the gray disc structure at high energy, instead of black disc behaviour which
was expected; (ii) the amplitude approaches the asymptotic limit in the same
way as the solution to the Balitsky-Kovchegov equation does ($\propto \exp(- C
Y^2) $), but the coefficient $C$ in eight times smaller than for the
Balitsky-Kovchegov equation; (iii) the process of merging of two dipoles into
one, only influences the high energy asymptotic behaviour by changing the
initial condition from $Z(Y; [u_i = 1]) = 1 $ to $Z(Y; [u_i = 1 -
\gamma_{0,i}]) =1$. The value of $\gamma_0$ is determined by the process of
merging of two dipoles into one. With this new initial condition the
Balitsky-JIMWLK approach describes the high energy asymptotic behaviour of the
scattering amplitude without any modifications recently suggested.


title:
Generation of Large-Scale Magnetic Fields from Dilaton Inflation in
  Noncommutative Spacetime

abstract:
  Generation of large-scale magnetic fields is studied in dilaton
electromagnetism in noncommutative inflationary cosmology, taking into account
the effects of the spacetime uncertainty principle motivated by string theory.
We show that it is possible to generate large-scale magnetic fields with
sufficient strength to account for the observed fields in galaxies and clusters
of galaxies through only adiabatic compression without dynamo amplification
mechanism in models of power-law inflation based on spacetime noncommutativity
without introducing a huge hierarchy between the dilaton's potential and its
coupling to the electromagnetic fields.


title: Analysis of a model with a common source of CP violation

abstract:
  We work in a model where all CP violating phenomena have a common source. CP
is spontaneously broken at a large scale $V$ through the phase of a complex
singlet scalar. An additional $SU(2)_L$ singlet vector-like down-type quark
relates this high scale CP violation to low energy. We quantitatively analyze
this model in the quark sector. We obtain the numerical values of the
parameters of the Lagrangian in the quark sector for a specific ansatz of the
$4\times4$ down-type quark mass matrix where the weak phase is generated
minimally. $Z \bar b b$ vertex will modify in presence of the extra vector-like
down-type quark. From the experimental lower bound of the partial decay width
$Z\to \bar b b$ we find out the lower bound of the additional down-type quark
mass. Tree level flavor changing neutral current appears in this model due to
the presence of the extra vector-like down-type quark. We give the range of
values of the mass splitting $\Delta m_{B_q}$ in $B^0_q-{\bar B}^0_q$ system
using SM box, $Z$ mediating tree level and $Z$ mediating one loop diagrams
together for both $q=d, s$. We find out the analytical expression for
$\Gamma_{12}^q$ in this model from standard box, $Z$ and Higgs mediated penguin
diagrams for $B^0_q-{\bar B}^0_q$ system, $q=d,s$. From this we numerically
evaluate the decay width difference $|\Delta\Gamma_{B_q}/\Gamma_{B_q}|$. We
also find out the numerical values of the CP asymmetry parameters $a_J$ and
$a_\pi$ for the decays $B^0_d\to J/\psi K_s$ and $B^0_d\to \pi^+ \pi^-$
respectively. We get the lower bound of the scale $V$ through the upper bound
of the strong CP phase.


title: Probe the effects of split SUSY in rare B decays

abstract:
  We study the decays of $B\to K^{(*)} \ell^{+} \ell^{-}$ in split
supersymmetry with R-parity violation. We find that the decay branching ratio
of $B\to K\tau^+\tau^-$ in the new physics model due to the scalar interactions
can be $1.8\times 10^{-6}$ which is about one order of magnitude larger that in
the standard model, whereas those of $B\to K\ell^+\ell^-$ ($\ell=e$ and $\mu$)
and the $K^*$ modes are insensitive to the new physics. On the other hand, the
forward-backward asymmetries of $B\to K \tau^{+} \tau^{-}$ and
$K\mu^{+}\mu^{-}$, vanishing in the standard model, can be over 10 and 1%,
respectively. In addition, we show that the new interactions will significantly
change the forward-backward asymmetry in $B\to K^* \tau^{+} \tau^{-}$.


title: Indirect Detection of Dirac Right-Handed Neutrino Dark Matter

abstract:
  We present the signatures and prospects for the indirect detection of a Dirac
right-handed neutrino dark matter candidate in neutrino telescopes, cosmic
positron experiments and gamma-ray telescopes. An example of such a dark matter
candidate can be found in extra-dimensional models. In some constructions,
Kaluza--Klein states with the gauge quantum numbers of a right-handed neutrino
can have sizable gauge interactions with Standard Model particles. For
instance, in 5D warped Grand Unified Theories, it has been shown that a
Kaluza--Klein right-handed neutrino may be stable and otherwise a
phenomenologically viable dark matter candidate. We find that the prospects for
the indirect detection of such a WIMP are encouraging, particularly for
neutrino telescopes and cosmic positron experiments.


title:
Energy Loss of Leading Hadrons and Direct Photon production in Evolving
  Quark-Gluon Plasma

abstract:
  We calculate the nuclear modification factor of neutral pions and the photon
yield at high p_T in central Au-Au collisions at RHIC (\sqrt{s}=200 GeV) and
Pb-Pb collisions at the LHC (\sqrt{s}=5500 GeV). A leading-order accurate
treatment of jet energy loss in the medium has been convolved with a physical
description of the initial spatial distribution of jets and a (1+1) dimensional
expansion. We reproduce the nuclear modification factor of pion R_{AA} at RHIC,
assuming an initial temperature T_i=370 MeV and a formation time \tau_i=0.26
fm/c, corresponding to dN/dy=1260. The resulting suppression depends on the
particle rapidity density dN/dy but weakly on the initial temperature. The jet
energy loss treatment is also included in the calculation of high p_T photons.
Photons coming from primordial hard N-N scattering are the dominant
contribution at RHIC for p_T > 5 GeV, while at the LHC, the range 8<p_T<14 GeV
is dominated by jet-photon conversion in the plasma.


title:
The Standard Model on Non-Commutative Space-Time: Electroweak Currents
  and Higgs Sector

abstract:
  In this article we review the electroweak charged and neutral currents in the
Non-Commutative Standard Model (NCSM) and compute the Higgs and Yukawa parts of
the NCSM action. With the aim to make the NCSM accessible to phenomenological
considerations, all relevant expressions are given in terms of physical fields
and Feynman rules are provided.


title: Strings with a confining core in a Quark-Gluon Plasma

abstract:
  We consider the intersection of N different interfaces interpolating between
different $Z_N$ vacua of an SU(N) gauge theory using the Polyakov loop order
parameter. Topological arguments show that at such a string-like junction, the
order parameter should vanish, implying that the core of this string (i.e. the
junction region of all the interfaces) is in the confining phase. Using the
effective potential for the Polyakov loop proposed by Pisarski for QCD, we use
numerical minimization technique and estimate the energy per unit length of the
core of this string to be about 2.7 GeV/fm at a temperature about twice the
critical temperature. For the parameters used, the interface tension is
obtained to be about 7 GeV/fm$^2$. Lattice simulation of pure gauge theories
should be able to investigate properties of these strings. For QCD with quarks,
it has been discussed in the literature that this $Z_N$ symmetry may still be
meaningful, with quark contributions leading to explicit breaking of this $Z_N$
symmetry. With this interpretation, such {\it QGP} strings may play important
role in the evolution of the quark-gluon plasma phase and in the dynamics of
quark-hadron transition.


title:
Diffraction as a CP and Lineshape Analyzer for MSSM Higgs Bosons at the
  LHC

abstract:
  We study the production and decay of a coupled system of mixed neutral MSSM
Higgs bosons in exclusive double-diffractive processes at the LHC, including
non-vanishing CP phases in the soft supersymmetry-breaking gaugino masses and
third-generation trilinear squark couplings. The three neutral Higgs bosons are
naturally nearly degenerate, for large values of \tan\beta, when the charged
Higgs boson weighs around 150 GeV. Large mixing between all three neutral Higgs
bosons is possible when CP is violated, a three-way mixing scenario which we
also term tri-mixing. A resolution in the Higgs mass of \sim 1 GeV, which may
be achievable using the missing-mass method, would allow one to distinguish
nearly degenerate Higgs bosons by studying the production lineshape.
Measurements of the polarizations of the tau leptons coming from the
Higgs-boson decays could offer a direct and observable signal of CP violation
in the Higgs sector.


title: Revolutions and Revelations

abstract: Concluding talk, Physics at LHC 2004, Vienna


title: Simulated annealing for generalized Skyrme models

abstract:
  We use a simulated annealing algorithm to find the static field configuration
with the lowest energy in a given sector of topological charge for generalized
SU(2) Skyrme models. These numerical results suggest that the following
conjecture may hold: the symmetries of the soliton solutions of extended Skyrme
models are the same as for the Skyrme model. Indeed, this is verified for two
effective Lagrangians with terms of order six and order eight in derivatives of
the pion fields respectively for topological charges B=1 up to B=4. We also
evaluate the energy of these multi-skyrmions using the rational maps ansatz. A
comparison with the exact numerical results shows that the reliability of this
approximation for extended Skyrme models is almost as good as for the pure
Skyrme model. Some details regarding the implementation of the simulated
annealing algorithm in one and three spatial dimensions are provided.


title: Hybrid Inflation, Dark Energy And Dark Matter

abstract:
  It has been suggested that the dark energy density \rho_v ~ 10^{-12} eV^4 in
the universe is associated with a metastable (false) vacuum, while the true
vacuum has a vanishing cosmological constant. By including supergravity
corrections we show how this is naturally realized in realistic supersymmetric
hybrid inflation models. With a fundamental supersymmetry breaking scale ~ TeV,
the LSP is not a suitable candidate for cold dark matter. We consider axion
physics to overcome this and simultaneously provide a resolution of the MSSM
\mu problem.


title:
The Electroweak Phase Transition on Orbifolds with Gauge-Higgs
  Unification

abstract:
  The dynamics of five dimensional Wilson line phases at finite temperature is
studied in the one-loop approximation. We show that at temperatures of order T
\sim 1/L, where L is the length of the compact space, the gauge symmetry is
always restored and the electroweak phase transition appears to be of first
order.
  Particular attention is devoted to the study of a recently proposed five
dimensional orbifold model (on S1/Z2) where the Wilson line phase is identified
with the Higgs field (gauge-Higgs unification). Interestingly enough, an
estimate of the leading higher-loop ``daisy'' (or ``ring'') diagram
contributions to the effective potential in a simple five dimensional model,
seems to suggest that the electroweak phase transition can be studied in
perturbation theory even for Higgs masses above the current experimental limit
of 114 GeV. The transition is still of first order for such values of the Higgs
mass. If large localized gauge kinetic terms are present, the transition might
be strong enough to give baryogenesis at the electroweak transition.


title: Naturalness and Naturalness Criteria

abstract:
  We analysis how to describe the level of naturalness and pointed out that
Barbieri and Giudice's the widely adopted sensitivity criteria of naturalness
can not reflect the level of naturalness correctly, we analysis the problems of
the sensitivity criteria and proposed a new criterion that can solve these
problems, and also give a clear physical meaning to the naturalness cut-off
level.


title:
Electric dipole moments of charged leptons in the split fermion scenario
  in the two Higgs doublet model

abstract:
  We predict the charged lepton electric dipole moments in the split fermion
scenario in the framework of the two Higgs doublet model. We observe that the
numerical value of the muon (tau) electric dipole moment is at the order of the
magnitude of $10^{-22} (e-cm)$ ($10^{-20} (e-cm)$) and there is an enhancement
in the case of two extra dimensions, especially for the tau lepton electric
dipole moment.


title: Effects of CPT and Lorentz Invariance Violation on Pulsar Kicks

abstract:
  The breakdown of Lorentz's and CPT invariance, as described by the Extension
of the Standard Model, gives rise to a modification of the dispersion relation
of particles. Consequences of such a modification are reviewed in the framework
of pulsar kicks induced by neutrino oscillations (active-sterile conversion). A
peculiar feature of the modified energy-momentum relations is the occurrence of
terms of the form $\delta {\bbox \Pi}\cdot {\bf {\hat p}}$, where $\delta
{\bbox \Pi}$ accounts for the difference of spatial components of flavor
depending coefficients which lead to the departure of the Lorentz symmetry, and
${\bf {\hat p}}={\bf p}/p$, being ${\bf p}$ the neutrino momentum. Owing to the
relative orientation of ${\bf p}$ with respect to $\delta {\bbox \Pi}$, the
{\it coupling} $\delta {\bbox \Pi}\cdot {\bf {\hat p}}$ may induce the
mechanism to generate the observed pulsar velocities. Topics related to the
velocity distribution of pulsars are also discussed.


title: Numerical Contour Integration for Loop Integrals

abstract:
  A fully numerical method to calculate loop integrals, a numerical
contour-integration method, is proposed. Loop integrals can be interpreted as a
contour integral in a complex plane for an integrand with multi-poles in the
plane. Stable and efficient numerical integrations an along appropriate contour
can be performed for tensor integrals as well as for scalar ones appearing in
loop calculations of the standard model. Examples of 3- and 4-point diagrams in
1-loop integrals and 2- and 3-point diagrams in 2-loop integrals with arbitrary
masses are shown.
  Moreover it is shown that numerical evaluations of the Hypergeometric
function, which often appears in the loop integrals, can be performed using the
numerical contour-integration method.


title:
A Remark on the Method of Electron Beam Energy Measurement Using Laser
  Light Resonance Absorption

abstract:
  The problem of measuring of the electron beam energy by help of the laser
light interaction with the electrons is discussed. It is shown that the
orthogonal orientation of the laser beam with respect to the electron one,
proposed in the present Note, may allow to perform this measurement in
accordance with the physical nature of a formation of an electron quantum
levels in a magnetic field. In result, the final formula, that expresses the
beam energy through the strength of a magnetic field and the energy of the
laser photon, gets a transparent physical meaning and do contain a less number
of parameters (what may lead to an increase of the precision of the
measurement). Some other sequences from this proposal, like the change of the
geometry of the experimental set-up and the necessity of a new additional
detector to register the products of the Compton scattering for monitoring of
the beam energy measurements, are discussed also.


title:
Coherent and incoherent pair creation by a photon in oriented single
  crystal

abstract:
  The new approach is developed for study of electron-positron pair production
by a photon in oriented single crystal. It permits indivisible consideration of
both coherent and incoherent mechanisms of pair creation and includes the
action of field of axis (or plane) as well as the multiple scattering of
particles of the created pair (the Landau-Pomeranchuk-Migdal (LPM) effect).
  From obtained integral probability of pair creation, it follows that multiple
scattering appears only for relatively low energy of photon, while at higher
photon energy the field action excludes the LPM effect. The found results agree
quite satisfactory with recent CERN experiment.


title:
Production and Decay of Charmed Baryons: Spectra of Muons and Asymmetry
  between mu+ and mu-

abstract:
  The calculation of muon spectra from the decay of Lambda_c baryons was
carried out on the basis of the description of recent data on charmed-baryon
production in hadronic interactions. Data are described in the framework of
Quark--Gluon String Model that allowes us to consider primary proton
interactions of arbitrary high energy. MC code was built for charmed-baryon
semileptonic decay in order to obtain the kinematical characteristics of
resulting particles. It is predicted that the charge asymmetry between energy
spectra of mu+ and mu- in laboratory system is clearly seen as the consequence
of asymmetry between the spectra of charmed baryons and antibaryons.This
extension of QGS Model can be useful to correct the calculations of muon and
neutrino spectra in astrophysics.


title:
Magnetic moment of the pentaquark $\Theta^+(1540)$ as
  diquark-diquark-antiquark state with QCD sum rules

abstract:
  In this article, we study the magnetic moment of the pentaquark state $
\Theta^+(1540)$ as diquark-diquark-antiquark ($[ud][ud]\bar{s}$) state with the
QCD sum rules in the external weak electromagnetic field (EFSR) and the
light-cone QCD sum rules (LCSR) respectively. The numerical results indicate
the magnetic moment is about $\mu_{\Theta^+}=-(0.11\pm 0.02)\mu_N$ for the EFSR
and $\mu_{\Theta^+}\approx-(0.1-0.5)\mu_N$ for the LCSR. As the values obtained
from the EFSR are more stable than the corresponding ones from the LCSR,
$\mu_{\Theta^+}=-(0.11\pm 0.02)\mu_N$ is more reliable.


title:
A light-front Quark Model for the electromagnetic form factor of the
  pion

abstract:
  In this contribution, an approach for a unified description of the pion
electromagnetic form factor, in the space- and time-like regions, within a
constituent quark model on the light front, will be reviewed. Our approach is
based on i) the on-shell quark-hadron vertex functions in the valence sector,
ii) the dressed photon vertex where a photon decays in a quark-antiquark pair,
and iii) the emission and absorption amplitudes of a pion by a quark. Results
favorably compare with the existing experimental data.


title:
The effect of the in-medium $\Theta^+$ pentaquark on the kaon optical
  potential

abstract:
  The kaon nuclear optical potential is studied including the effect of the
$\Theta^+$ pentaquark. The one-nucleon contribution is obtained using an
extension of the J\"ulich meson-exchange potential as bare kaon-nucleon
interaction. Significant differences between a fully self-consistent
calculation and the usually employed low-density $T\rho$ approach are observed.
The influence of the one-nucleon absorption process, $K N \to \Theta^+$, on the
kaon optical potential is negligible due to the small width of the pentaquark.
In contrast, the two-nucleon mechanism, $K N N \to \Theta^+ N$, estimated from
the coupling of the pentaquark to a two-meson cloud, provides the required
amount of additional kaon absorption to reconcile with data the systematically
low $K^+$-nucleus reaction cross sections found by the theoretical models.


title: Matter effects on Majorana neutrino phases

abstract:
  We consider the effect of ambient matter on the Majorana phase of neutrinos.
We find that this can lead to an observable signal if a neutrino oscillation
experiment could be performed where the source and the detector are at
appropriately different matter densities. We illustrate the situation using a
beta beam neutrino source as an example and show that a 5 sigma signal for the
matter modification of the Majorana phase could be possible in a 5-year run.


title:
S-wave pi-pi phase shifts and scattering lengths. The model-independent
  analysis

abstract:
  The model-independent analysis of the S- and P-wave pi-pi phase shifts was
carried out. This analysis was based on the using of the Roy equations only and
all available experimental data from the threshold up to dipion mass 1GeV. The
S-wave lengths obtained obviously confirm the standard ChPT version. Moreover,
additional arguments were found in favor of the ratio of the S-wave phase
shifts being independent of energy from the threshold up to 900MeV.


title: Relativistic description of the charmonium mass spectrum

abstract:
  The charmonium mass spectrum is considered in the framework of the
constituent quark model with the relativistic treatment of the c quark. The
obtained masses are in good agreement with the existing experimental data
including the mass of eta_c(2S).


title: Speed-up of neutrino transformations in a supernova environment

abstract:
  When the neutral current neutrino-neutrino interaction is treated completely,
rather than as an interaction among angle-averaged distributions, or as a set
of flavor-diagonal effective potentials, the result can be flavor mixing at a
speed orders of magnitude faster than that one would anticipate from the
measured neutrino oscillation parameters. It is possible that the energy
spectra of the three active species of neutrinos emerging from a supernova are
nearly identical.


title: Neutrino Decay and Neutrinoless Double Beta Decay in a 3-3-1 Model

abstract:
  In this work we show that the implementation of spontaneous breaking of the
lepton number in the 3-3-1 model with right-handed neutrinos gives rise to fast
neutrino decay with majoron emission and generates a bunch of new contributions
to the neutrinoless double beta decay.


title:
Transverse-Momentum-Dependent Gluon Distributions and Semi-inclusive
  Processes at Hadron Colliders

abstract:
  We study transverse-momentum-dependent (TMD) gluon distributions and
factorization theorems for the gluon-initiated semi-inclusive processes at
hadron colliders. Gauge-invariant TMD gluon distributions are defined, and
their relations to the integrated (Feynman) parton distributions are explored
when the transverse momentum is large. Through explicit calculations,
soft-collinear factorization is verified at one-loop order for scalar particle
production. Summation over large double logarithms is made through solving the
Collins-Soper equation. We reproduce the known result in the limit that the
transverse momentum of the scalar is large.


title: The Problem of Mass: Mesonic Bound States Above T_c

abstract:
  We discuss the problem of mass, noting that meson masses decrease with
increasing scale as the dynamically generated condensate of "soft glue" is
melted (Brown/Rho scaling). We then extend the Bielefeld LGS color singlet
interaction computed for heavy quarks in a model-dependent way by including the
Ampere law velocity-velocity interaction. Parameterizing the resulting
interaction in terms of effective strength of the potential and including
screening, we find that the masses of pi, sigma, rho and A1 excitations, 32
degrees of freedom in all, go to zero (in the chiral limit) as T goes to Tc
essentially independently of the input quark (thermal) masses in the range of
1-2 GeV, calculated also in Bielefeld. We discuss other LGS which show q-bar q
bound states, which we interpret as our chirally restored mesons, for T > Tc.


title: Localized Kaluza-Klein Graviton and Cosmological Constant

abstract:
  We study linearized graviton in the presence of a four-dimensional
cosmological constant in two brane models with a warped extra dimension. In
explicit models including bulk scalar fields, we calculate the masses of
Kaluza-Klein modes of graviton and their interactions with matter on the
visible brane. It is shown that the effects of the cosmological constant
contribute by the equivalent size to the warp factor, masses and couplings and
that bulk scalar fields can increase the effects. This is examined further
independently of the forms of scalar potentials. Then it is found how the
masses and couplings are described in terms of the warp factors and generic
scalar potentials. A possibility that the masses and couplings are
significantly changed by cosmological constant effects is discussed.


title:
Global Analysis of Data on the Proton Structure Function g1 and
  Extraction of its Moments

abstract:
  Inspired by recent measurements with the CLAS detector at Jefferson Lab, we
perform a self-consistent analysis of world data on the proton structure
function g1 in the range 0.17 < Q2 < 30 (GeV/c)**2. We compute for the first
time low-order moments of g1 and study their evolution from small to large
values of Q2. The analysis includes the latest data on both the unpolarized
inclusive cross sections and the ratio R = sigmaL / sigmaT from Jefferson Lab,
as well as a new model for the transverse asymmetry A2 in the resonance region.
The contributions of both leading and higher twists are extracted, taking into
account effects from radiative corrections beyond the next-to-leading order by
means of soft-gluon resummation techniques. The leading twist is determined
with remarkably good accuracy and is compared with the predictions obtained
using various polarized parton distribution sets available in the literature.
The contribution of higher twists to the g1 moments is found to be
significantly larger than in the case of the unpolarized structure function F2.


title:
Non-singlet structure functions: Combining the leading logarithms
  resummation at small-x with DGLAP

abstract:
  The explicit expressions for the non-singlet DIS structure functions obtained
at small x by resumming the most singular logarithmic contributions are
discussed and compared in detail with the DGLAP evolution for different values
of x and Q^2. The role played by the initial conditions for the parton
densities currently used in the DGLAP analysis, on the small-$x$ behavior of
the non-singlet structure functions is discussed. Explicit expressions are
presented which implement the NLO DGLAP contributions with our small-x results.


title:
Higgs Boson Mass and Electroweak-Gravity Hierarchy from Dynamical
  Gauge-Higgs Unification in the Warped Spacetime

abstract:
  Dynamical electroweak symmetry breaking by the Hosotani mechanism in the
Randall-Sundrum warped spacetime is examined, relations among the W-boson mass
(m_W), the Kaluza-Klein mass scale (M_{KK}), and the Higgs boson mass (m_H)
being derived. It is shown that M_{KK}/m_W = (2 pi kR)^{1/2} (pi/theta_W) and
m_H /m_W = 0.058 kR (pi/theta_W), where k^2, R, and theta_W are the curvature
and size of the extra-dimensional space and the Wilson line phase determined
dynamically. For typical values kR = 12 and theta_W = (0.2 to 0.4) pi, one
finds that M_{KK} = (1.7 to 3.5) TeV, k = (1.3 to 2.6) x 10^{19} GeV, and m_H =
(140 to 280) GeV.


title: Optimal $\beta$-beam at the CERN-SPS

abstract:
  A $\beta$-beam with maximum $\gamma=150$ (for $\helio$ ions) or $\gamma=250$
(for $\neon$) could be achieved at the CERN-SPS. We study the sensitivity to
$\theta_{13}$ and $\delta$ of such a beam as function of $\gamma$, optimizing
with the baseline constrained to CERN-Frejus (130 km), and also with
simultaneous variation of the baseline. These results are compared to the {\it
standard} scenario previously considered, with lower $\gamma=60/100$, and also
with a higher $\gamma\sim 350$ option that requires a more powerful
accelerator. Although higher $\gamma$ is better, loss of sensitivity to $\theta
_{13}$ and $\delta$ is most pronounced for $\gamma$ below 100.


title:
Is observed direct CP violation in $B_d \to K^+ \pi^-$ due to new
  physics? Check standard model prediction of equal violation in $B_s \to K^-
  \pi^+$

abstract:
  The recently observed direct CP violation in $B_d \to K^+ \pi^-$ has raised
suggestions of possible new physics. A robust test of the standard model vs.
new physics is its prediction of equal direct CP violation in $B_s \to K^-
\pi^+$ decay. CPT invariance requires the observed CP violation to arise from
the interference between the dominant penguin amplitude and another amplitude
with a different weak phase and a different strong phase. The penguin
contribution to $B_d \to K^+ \pi^-$ is known to be reduced by a CKM factor in
$B_s \to K^- \pi^+$. Thus the two branching ratios are very different and a
different CP violation is expected. But in the standard model a miracle occurs
and the interfering tree diagram is enhanced by the same CKM factor that
reduces the penguin to give the predicted equality. This miracle is not
expected in new physics; thus a search for and measurement of the predicted CP
violation in $B_s \to K^- \pi^+$ decay is a sensitive test for a new physics
contribution. A detailed analysis shows this prediction to be robust and
insensitive to symmetry breaking effects and possible additional contributions.


title:
On the analysis of lepton scattering on longitudinally or transversely
  polarized protons

abstract:
  We discuss polarized lepton-proton scattering with special emphasis on the
difference between target polarization defined relative to the lepton beam or
to the virtual photon direction. In particular, this difference influences
azimuthal distributions in the final state. We provide a general framework of
analysis and apply it to the specific cases of semi-inclusive deep inelastic
scattering, of exclusive meson production, and of deeply virtual Compton
scattering.


title:
Noncommutative QED corrections to e^+e^-\to\gamma\gamma\gamma at linear
  collider energies

abstract:
  We compute the total cross section as well as angular and energy
distributions for process $e^+e^-\to\gamma\gamma\gamma$ with both unpolarized
and polarized beams in the framework of noncommutative quantum electrodynamics
(NCQED). The calculation is performed in the center of mass of colliding
electron and positron and is evaluated for energies and integrated luminosities
appropriate to future linear colliders. We find that by using unpolarized beams
it is possible to probe the Lorentz symmetry violating azimuthal dependence of
the cross section. Furthermore, with polarized beams the left-right asymmetry
of the CP violating NCQED amplitudes can be used to obtain bounds on the
noncommutative scale $\Lambda_{NC}$ which exceed 1.0 TeV.


title: Mass relations among quarks and/or leptons

abstract:
  The mass relations among respective quark family members are predicted and
similar mass relation for the lepton family member are obtained. The volume of
the volume element is also calculated which is (3/2)^(1/2).


title: l W nu production at CLIC: a window to TeV scale non-decoupled neutrinos

abstract:
  We discuss single heavy neutrino production e+ e- -> N nu -> l W nu, l = e,
mu, tau, at a future high energy collider like CLIC, with a centre of mass
energy of 3 TeV. This process could allow to detect heavy neutrinos with masses
of 1-2 TeV if their coupling to the electron V_eN is in the range 0.004-0.01.
We study the dependence of the limits on the heavy neutrino mass and emphasise
the crucial role of lepton flavour in the discovery of a positive signal at
CLIC energy. We present strategies to determine heavy neutrino properties once
they are discovered, namely their Dirac or Majorana character and the size and
chirality of their charged current couplings. Conversely, if no signal is
found, the bound V_eN < 0.002-0.006 would be set for masses of 1-2 TeV,
improving the present limit up to a factor of 30. We also extend previous work
examining in detail the flavour and mass dependence of the corresponding limits
at ILC, as well as the determination of heavy neutrino properties if they are
discovered at this collider.


title: Covariant Model for Relativistic Three-Body Systems

abstract:
  The system is described by three mass-shell constraints. After a nonlinear
transformation of the momenta, the analytic form taken by admissible
interactions (allowing compatibility) is characterized in terms of the new
variables. These variables mix two-body clusters, which results in
automatically incorporating three-body forces. Two superfluous degrees of
freedom are eliminated, which yields a reduced equation for a wave function
depending on three-dimensional arguments. When at least two masses are equal,
this picture has a reasonable nonrelativistic limit. At first post-Galilean
order and provided the interaction is not too much energy-dependent, the
relativistic correction is tractable like a conventional perturbation problem.
A covariant version of harmonic oscillator is given as a toy model.


title: Mass Varying Neutrinos in the Sun

abstract:
  In this work we study the phenomenological consequences of the dependence of
mass varying neutrinos on the neutrino density in the Sun, which we precisely
compute in each point along the neutrino trajectory. We find that a generic
characteristic of these scenarios is that they establish a connection between
the effective Delta m^2 in the Sun and the absolute neutrino mass scale. This
does not lead to any new allowed region in the oscillation parameter space. On
the contrary, due to this effect, the description of solar neutrino data
worsens for large absolute mass. As a consequence a lower bound on the level of
degeneracy can be derived from the combined analysis of the solar and KamLAND
data. In particular this implies that the analysis favours normal over inverted
mass orderings. These results, in combination with a positive independent
determination of the absolute neutrino mass, can be used as a test of these
scenarios together with a precise determination of the energy dependence of the
survival probability of solar neutrinos, in particular for low energies.


title: Lepton masses and mixing angles from heterotic orbifold models

abstract:
  We systematically study the possibility for realizing realistic values of
lepton mass ratios and mixing angles by using only renormalizable Yukawa
couplings derived from heterotic $Z_6$-I orbifold. We assume one pair of up and
down sector Higgs fields. We consider both the Dirac neutrino mass scenario and
the seesaw scenario with degenerate right-handed majorana neutrino masses. It
is found that realistic values of the charged lepton mass ratios, $m_e/m_\tau$
and $m_\mu/m_\tau$, the neutrino mass squared difference ratio, $\Delta
m^2_{31}/\Delta m^2_{21}$, and the lepton mixing angles can be obtained in
certain cases.


title: Propagation of supersymmetric charged sleptons at high energies

abstract:
  The potential for neutrino telescopes to discover charged stau production in
neutrino-nucleon interactions in Earth depends in part on the stau lifetime and
range. In some supersymmetric scenarios, the next lightest supersymmetric
particle is a stau with a decay length on the scale of 10 km. We evaluate the
electromagnetic energy loss as a function of energy and stau mass. The energy
loss parameter $\beta$ scales as the inverse stau mass for the dominating
electromagnetic processes, photonuclear and $e^+e^-$ pair production. The range
can be parameterized as a function of stau mass, initial energy and minimum
final energy. In comparison to earlier estimates of the stau range, our results
are as much as a factor of two larger, improving the potential for stau
discovery in neutrino telescopes.


title: Neutrino texture saturating the CP asymmetry

abstract:
  We study a neutrino mass texture which can explain the neutrino oscillation
data and also saturate the upper bound of the CP asymmetry $\epsilon_1$ in the
leptogenesis. We consider the thermal and non-thermal leptogenesis based on the
right-handed neutrino decay in this model. A lower bound of the reheating
temperature required for the explanation of the baryon number asymmetry is
estimated as $O(10^8)$GeV for the thermal leptogenesis and $O(10^{6})$GeV for
the non-thermal one.It can be lower than the upper bound of the reheating
temperature imposed by the cosmological gravitino problem. An example of the
construction of the discussed texture is also presented.


title: Random matrix models for chiral and diquark condensation

abstract:
  We consider random matrix models for the thermodynamic competition between
chiral symmetry breaking and diquark condensation in QCD at finite temperature
and finite baryon density. The models produce mean field phase diagrams whose
topology depends solely on the global symmetries of the theory. We discuss the
block structure of the interactions that is imposed by chiral, spin, and color
degrees of freedom and comment on the treatment of density and temperature
effects. Extension of the coupling parameters to a larger class of theories
allows us to investigate the robustness of the phase topology with respect to
variations in the dynamics of the interactions. We briefly study the phase
structure as a function of coupling parameters and the number of colors.


title:
Propagation of Partially Coherent Photons in an Ultra-Intense Radiation
  Gas

abstract:
  The scattering of photons off photons at the one-loop level is investigated.
We give a short review of the weak field limit, as given by the first order
term in the series expansion of the Heisenberg-Euler Lagrangian. The dispersion
relation for a photon in a radiation gas is presented. Based on this, a wave
kinetic equation and a set of fluid equations is formulated. These equations
describe the interaction between a partially coherent electromagnetic pulse and
an intense radiation gas. The implications of the results are discussed.


title:
The Meaning of Coherence in Weak Decay Processes: `Neutrino
  Oscillations' Reconsidered

abstract:
  A Feynman path integral analysis of a two-neutrino-flavour electron
appearence experiment following pion decay at rest recovers the standard
oscillation phase, revealing an important contribution from the decay amplitude
of the pion as well as an error in previous similar calculations by the present
author. In the calculation, path amplitudes for different neutrino mass
eigenstates add coherently, but no putative `neutrino flavour eigenstates' are
invoked.
  It is shown that the coherent production of the latter states is incompatible
with the measured values of $\Gamma(\pi \rightarrow {\rm e}\nu)/\Gamma(\pi
\rightarrow \mu \nu)$ and the PMNS matrix elements. Application of the path
integral approach to other two-path quantum interference experiments is
compared with that to neutrino oscillations, and other treatments of the latter
in the literature are discussed.


title: The Standard Model with Modified Asymmetric Potential

abstract:
  We consider a version of special relativity assuming that the metric in
inertial frames is conformally pseudoeuclidean and depends on some scalar field
with zero vacuum average. Applying this modified special relativity to the
theory of electroweak interactions, and assuming that the introduced scalar
field is proportional to the Higgs field, we show there is full consistency
between the minimal Standard Model and our approach, except that, in our model,
the potential in the Higgs sector is asymmetric and has two distinct vacuum
states. It is found that, in the new modified model the mass of the Higgs
particle is half that in the minimal Standard Model.


title:
Calculations of single-inclusive cross sections and spin asymmetries in
  pp scattering

abstract:
  We present calculations of cross sections and spin asymmetries in
single-inclusive reactions in pp scattering. We discuss next-to-leading order
predictions as well as all-order soft-gluon threshold resummations.


title: A Very Naive Model of Hadron with Negative Quintessence

abstract:
  A simple model of hadron which exhibits the quark confinement and the
asymptotic freedom is described. The hadron is modelled as a sphere of radius
equal to its Compton wavelength in which quarks occur surrounded by space with
the uniformly distributed {\it negative} vacuum energy density characterized by
$\lambda$. The acceleration stemming from this vacuum energy causes the quark
confinement. However, in the center of hadron quarks behave as practically free
particles. From the requirement that the Compton wavelength of a hadron should
remain constant while the scale factor varies with time we estimate the
strength of the vacuum energy density surrounding quarks. It follows that the
inward pressure of this vacuum energy is large enough to keep quarks inside the
hadron.


title: Can Thermalization in Heavy Ion Collisions be Described by QCD Diagrams?

abstract:
  The onset of thermalization in heavy ion collisions in the weak coupling
framework can be viewed as a transition from the initial state Color Glass
Condensate dynamics, characterized by the energy density scaling like $\epsilon
\sim 1/\tau$ with $\tau$ the proper time, to the hydrodynamics-driven expansion
of the quark-gluon plasma with $\epsilon \sim 1/\tau^{4/3}$ (or higher power of
$1/\tau$ for the boost non-invariant case). We argue that, at any order of the
perturbative expansion in the QCD coupling constant, the gluon field generated
in an ultrarelativistic heavy ion collision leads to energy density scaling as
$\epsilon \sim 1/\tau$ for late times $\tau \gg 1/Q_s$. Therefore it is likely
that thermalization and hydrodynamic description of the gluon system produced
in heavy ion collisions can not result from perturbative QCD diagrams at these
late times. At earlier times with $\tau \sim 1/Q_s$ the subleading corrections
to $\epsilon$ in $1/\tau$ expansion (terms scaling like $\sim
1/\tau^{1+\Delta}$ with $\Delta >0$) may become important possibly leading to
hydrodynamic-like behavior of the gluon system. Still, we show that such
corrections do not contribute to the particle production cross section, and are
likely to be irrelevant for physical observables. We generalize our results by
including massless quarks into the system. Thus, it appears that the apparent
thermalization of quarks and gluons, leading to success of Bjorken
hydrodynamics in describing heavy ion collisions at RHIC, can only be
attributed to the non-perturbative QCD effects.


title: Next-to-next-to-leading order calculations for heavy-to-light decays

abstract:
  We present technical aspects of next-to-next-to-leading order calculations
for heavy-to-light decays such as top quark decay, semileptonic b quark decay
into a u quark, muon decay, and radiative decays like b -> s gamma. Algebraic
reduction of integrals to a set of master integrals is described, methods of
determining the master integrals are presented, and a complete list of master
integrals is given. As a sample application, the top quark decay width is
calculated to O(alpha_s^2) accuracy.


title: General Analysis of Single Top Production and W Helicity in Top Decay

abstract:
  We provide a framework for the analysis of the W boson helicity in the decay
of the top quark that is based on a general effective tbW coupling. Four
independent coupling coefficients can be uniquely determined by the fractions
of longitudinal and transverse W boson polarizations as well as the single top
production rates for the t-channel and the s-channel processes. The knowledge
of these coefficients can be used to discriminate models of electroweak
symmetry breaking.


title:
On the initial condition for evolution of the perturbative QCD Pomeron
  in the nucleus

abstract:
  It is shown that subdominant terms found in the reggeized gluon diagram
technique, to be added to Pomeron fan diagrams with the 3P interaction, can be
exactly taken into account by taking the initial condition for evolution in the
Glauber form. This demonstrates complete equivalence of the dipole picture and
the reggeized gluon approach not only on the leading level but also on the
subleading level.


title:
Selfconsistent calculations of spectral densities in the O(N) model:
  improving the Hartree-Fock approximation by including nonzero decay widths

abstract:
  We study the linear sigma model with O(N) symmetry at nonzero temperature in
the framework of the Cornwall-Jackiw-Tomboulis formalism. Extending the set of
two-particle irreducible diagrams by adding sunset diagrams to the usual
Hartree-Fock contributions, we derive a new approximation scheme which extends
the standard Hartree-Fock approximation by the inclusion of nonzero decay
widths. In this approximation, in-medium modifications of the meson masses as
well as decay and collisional broadening effects are selfconsistently taken
into account. As compared to the standard Hartree-Fock approximation, the
temperature for the chiral symmetry restoring phase transition is lowered by
\~20%. For large temperatures, the spectral densities of the sigma-meson and
the pion become degenerate, as required for the chirally symmetric phase.


title: Evidence for the two pole structure of the Lambda(1405) resonance

abstract:
  The K^- p --> pi^0 pi^0 Sigma^0 reaction is studied within a chiral unitary
model. The distribution of pi^0 Sigma^0 states forming the Lambda(1405) shows,
in agreement with a recent experiment, a peak at 1420 MeV and a relatively
narrow width of Gamma = 38 MeV. The mechanism for the reaction is largely
dominated by the emission of a pi^0 prior to the K^- p interaction leading to
the Lambda(1405). This ensures the coupling of the Lambda(1405) to the K^- p
channel, thus maximizing the contribution of the second state found in chiral
unitary theories, which is narrow and of higher energy than the nominal
Lambda(1405). This is unlike the pi^- p --> K^0 \pi Sigma reaction, which gives
more weight to the pole at lower energy and with a larger width. The data of
these two experiments, together with the present theoretical analysis, provides
a firm evidence of the two pole structure of the Lambda(1405).


title: Braneworld cosmology and noncommutative inflation

abstract:
  In this work we develop the patch formalism, an approach providing a very
simple and compact description of braneworld-motivated cosmologies with
nonstandard effective Friedmann equations. In particular, the Hubble parameter
is assumed to depend on some power of the brane energy density, H^2 \propto
\rho^q. The high-energy limit of Randall-Sundrum (q=2) and Gauss-Bonnet (q=2/3)
braneworlds are considered, during an accelerating era triggered by a single
ordinary or tachyonic scalar field. The inflationary dynamics, solutions, and
spectra are provided. Using the latest results from WMAP and other experiments
for estimates of cosmological observables, it is shown that future data and
missions can in principle discriminate between standard four-dimensional and
braneworld scenarios. The issue of non-Gaussianity is also studied within
nonlinear perturbation theory. The introduction of a fundamental energy scale
reinforces these results. Several classes of noncommutative inflationary models
are considered and their features analyzed in a number of ways and energy
regimes. Finally, we establish dual relations between inflationary,
cyclic/ekpyrotic and phantom cosmologies, as well as between scalar-driven and
tachyon-driven cosmologies. The exact dualities relating the four-dimensional
spectra are broken in favour of their braneworld counterparts. The dual
solutions display new interesting features because of the modification of the
effective Friedmann equation on the brane.


title:
Renormalization-group improved evolution of the meson distribution
  amplitude at the two-loop level

abstract:
  We discuss the two-loop evolution of the flavor-nonsinglet meson distribution
amplitude in perturbative QCD. After reviewing previous two-loop computations,
we outline the incompatibility of these solutions with the group property of
the renormalization-group transformations. To cure this deficiency, we compute
a correction factor for the non-diagonal part of the meson evolution equation
and prove that with this modification the two-loop solution conforms with the
group properties of the renormalization-group transformations. The special case
of a fixed strong coupling (no Q^2 dependence) is also discussed and comparison
is given to previously obtained results.


title: Quantum Clan Model description of Bose Einstein Correlations

abstract:
  We propose a novel numerical method of modelling Bose-Einstein correlations
(BEC) observed among identical (bosonic) particles produced in multiparticle
production reactions. We argue that the most natural approach is to work
directly in the momentum space in which the Bose statistics of secondaries
reveals itself in their tendency to bunch in a specific way in the available
phase space. Because such procedure is essentially identical to the clan model
of multiparticle distributions proposed some time ago, therefore we call it the
Quantum Clan Model.


title: Comments on Fractality of Proton at Small x

abstract:
  Using the concept of self similarity in the structure of the proton at small
$x$, we comment on possibility of a single positive fractal dimension of proton
in analogy with classical monofractals. Plausible dynamics and physical
interpretation of fractal dimension are also discussed.


title:
Multiparticle production processes from the Information Theory point of
  view

abstract:
  We look at multiparticle production processes from the Information Theory
point of view, both in its extensive and nonextensive versions. Examples of
both symmetric (like pp or AA) and asymmetric (like pA) collisions are
considered showing that some ways of description of experimental data used in
the literature are of more general validity than usually anticipated.}


title: AGK Cutting Rules and Multiple Scattering in Hadronic Collisions

abstract:
  We discuss the AGK rules for the exchange of an arbitrary number of reggeized
gluons in perturbative QCD in the high energy limit. Results include the
cancellation of corrections to single jet and double jet inclusive cross
sections, both for hard and soft rescattering contributions.


title: The Decay of Tau Leptons Produced in Neutrino-Nucleon Scatterings

abstract:
  Energy and angular distributions of the tau decay products in the
CERN-to-Gran Sasso $\nu_\tau$ appearance experiments are studied for the decay
modes $\tau\to\pi\nu$ and $\tau\to l\bar\nu\nu$ (l=e or mu). We find that the
decay particle distributions in the laboratory frame are significantly affected
by the tau polarization. Rather strong azimuthal asymmetry of $pi^-$ and $l^-$
about the tau momentum axis is predicted, which may have observable
consequences even at small statistics experiments.


title: Comment on "Ambiguities in the Up-Quark Mass"

abstract:
  Creutz [hep-ph/0312225] has argued that nonperturbative effects in QCD lead
to an additive ambiguity in the up quark mass, and that "this calls into
question the acceptability of attempts to solve the strong CP problem via a
vanishing mass for the lightest quark." We show that if the determinant of the
light quark mass matrix vanishes at any scale, then it is real at all scales.


title: Split Supersymmetry in Unified Models

abstract:
  In the context of split supersymmetry, the gaugino mass spectrum seems to be
very important to satisfy the dark matter content of the universe and the gauge
coupling unification. In this paper, we have considered various sources of
gaugino masses in the context of unified models. We show that the gaugino mass
spectrum varies in different unification pictures. In the context of SU(5), we
have found that the Bino/Wino mass ratio can be close to one at the weak scale
which is helpful to satisfy the WMAP data. The gluino/Wino mass ratio is also
different from the usual scenario of unified gaugino masses. The gaugino masses
can be around one TeV and m_SUSY is chosen so that the gluino mass does not
create any cosmological problem. In the context of the Pati-Salam model, we
show that the gluino mass can be made very heavy even after maintaining the
unification of the gauge couplings.


title: Matching parton showers to NLO computations

abstract:
  We give a prescription for attaching parton showers to next-to-leading order
(NLO) partonic jet cross sections in electron-positron annihilation. Our method
effectively extends to NLO the scheme of Catani, Krauss, Kuhn, and Webber for
matching between m hard jets and (m+1) hard jets. The matching between parton
splitting as part of a shower and parton splitting as part of NLO matrix
elements is based on the Catani-Seymour dipole subtraction method that is
commonly used for removing the singularities from the NLO matrix elements.}


title: Boundary Localized Symmetry Breaking and Topological Defects

abstract:
  We discuss the structure of topological defects in the context of extra
dimensions where the symmetry breaking terms are localized. These defects
develop structure in the extra dimension which differs from the case where
symmetry breaking is not localized. This new structure can lead to corrections
to the mass scale of the defects which is not captured by the effective theory
obtained by integrating out the extra dimension. We also consider the Higgsless
model of symmetry breaking and show that no finite energy defects appear in
some situations where they might have been expected.


title: Electric Dipole Moment in the Split Supersymmetry Models

abstract:
  We study an important contribution to the electric dipole moment (EDM) of the
electron (or quarks) at the two-loop level due to the $W$-EDM in the recently
proposed scenario of split supersymmetry. This contribution is independent of
the Higgs mass, and it can enhance the previous estimation of the electron
(neutron) EDM by $20-50%$ ($40-90%$). Our formula is new in its analytical
form.


title:
Deriving the QGP-hadron transition curve from two separate partition
  functions

abstract:
  A method is developed to consistently satisfy the Gibbs equilibrium
conditions between the quark-gluon and hadronic phase although each phase has
been formulated in separate grand canonical partition function containing three
quark flavours. The sector in the space of thermodynamic variables where the
transition takes place is restricted to a curve, according to the phase diagram
of QCD. The conservation laws of quantum numbers are also imposed on the
transition curve. The effect of the inclusion of the newly discovered
pentaquark states is considered. The freeze-out conditions of S+S, S+Ag (SPS)
and Au+Au (RHIC) are found compatible with a primordial QGP phase, but the
conditions indicated by Pb+Pb (SPS) are not.


title: Iso-curvature fluctuations through axion trapping by cosmic string wakes

abstract:
  We consider wake-like density fluctuations produced by cosmic strings at the
quark-hadron transition in the early universe. We show that low momentum axions
which are produced through the radiation from the axionic string at an earlier
stage, may get trapped inside these wakes due to delayed hadronization in these
overdense regions. As the interfaces, bordering the wakes, collapse, the axions
pick-up momentum from the walls and finally leave the wake regions. These
axions thus can produce large scale iso-curvature fluctuations. We have
calculated the detailed profile of these axionic density fluctuations and
discuss its astrophysical consequences.


title:
Geometric scaling in ultrahigh energy neutrinos and nonlinear
  perturbative QCD

abstract:
  It is shown that in ultrahigh energy inelastic neutrino-nucleon(nucleus)
scattering the cross sections for the boson-hadron(nucleus) reactions should
exhibit geometric scaling on the single variable tau_A =Q2/Q2_{sat,A}. The
dependence on energy and atomic number of the charged/neutral current cross
sections are encoded in the saturation momentum Q_{sat,A}. This fact allows an
analytical computation of the neutrino scattering on nucleon/nucleus at high
energies, providing a theoretical parameterization based on the scaling
property.


title: Collider signals of gravitino dark matter in bilinearly broken R-parity

abstract:
  In models with gauge mediated supersymmetry breaking the gravitino is the
lightest supersymmetric particle. If R-parity is violated the gravitino decays,
but with a half-live far exceeding the age of the universe and thus is, in
principle, a candidate for the dark matter. We consider the decays of the
next-to-lightest supersymmetric particle, assumed to be the neutralino. We show
that in models where the breaking of R-parity is bilinear, the condition that
R-parity violation explains correctly the measured neutrino masses fixes the
branching ratio of the decay ${\tilde \chi}^0_1 \to {\tilde G}\gamma$ in the
range $10^{-3}-10^{-2}$, if the gravitino mass is in the range required to
solve the dark matter problem, i.e. of the order (few) 100 eV. This scenario is
therefore directly testable at the next generation of colliders.


title: Second order brane cosmology with radion stabilization

abstract:
  We study cosmology in the five-dimensional Randall-Sundrum brane-world with a
stabilizing effective potential for the radion and matter localized on the
branes. The analysis is performed by employing a perturbative expansion in the
ratio rho/V between the matter energy density on the branes and the brane
tensions around the static Randall-Sundrum solution (which has rho=0 and brane
tensions +-V). This approach ensures that the matter evolves adiabatically and
allows us to find approximate solutions to second order in \rho/V. Some
particular cases are then analyzed in details.


title: Two-loop QCD gauge coupling at high temperatures

abstract:
  We determine the 2-loop effective gauge coupling of QCD at high temperatures,
defined as a matching coefficient appearing in the dimensionally reduced
effective field theory. The result allows to improve on one of the classic
non-perturbative probes for the convergence of the weak-coupling expansion at
high temperatures, the comparison of full and effective theory determinations
of an observable called the spatial string tension. We find surprisingly good
agreement almost down to the critical temperature of the deconfinement phase
transition. We also determine one new contribution of order O(g^6T^4) to the
pressure of hot QCD.


title: Fluctuating pulled fronts & Pomerons

abstract:
  I give a physical discussion of the influence of particle number fluctuations
on the high energy evolution in QCD. I emphasize the event-by-event description
and the correspondence with the problem of `fluctuating pulled fronts' in
statistical physics. I show that the correlations generated by fluctuations
reduce the phase-space for BFKL evolution up to saturation. Because of that,
the evolution `slows down', and the rate for the energy increase of the
saturation momentum is considerably decreased. Also, the stochastic aspects
inherent in fluctuations lead to the breakdown of geometric scaling and of the
BFKL approximation. Finally, I explain the diagrammatic interpretation of the
particle number fluctuations as initiators of the Pomeron loops.


title: Multi-Gluon Collinear Limits from MHV diagrams

abstract:
  We consider the multi-collinear limit of multi-gluon QCD amplitudes at tree
level. We use the MHV rules for constructing colour ordered tree amplitudes and
the general collinear factorization formula to derive timelike splitting
functions that are valid for specific numbers of negative helicity gluons and
an arbitrary number of positive helicity gluons (or vice versa). As an example
we present new results describing the collinear limits of up to six gluons.


title:
The Standard Model on Non-Commutative Space-Time: Strong Interactions
  Included

abstract:
  This paper is a direct extension of our paper: "The Standard Model on
Non-Commutative Space-Time: Electroweak currents and Higgs sector",
hep-ph/0502249, now with strong interactions included. Apart from the
non-commutative corrections to Standard Model strong interactions, several new
interactions appear. The most interesting ones are gluonic interactions with
the electroweak sector. They are elaborated here in detail and the Feynman
rules for interactions up to O(gs^2 theta) are provided.


title: The $\nu$MSM, Dark Matter and Neutrino Masses

abstract:
  We investigate an extension of the Minimal Standard Model by right-handed
neutrinos (the $\nu$MSM) to incorporate neutrino masses consistent with
oscillation experiments. Within this theory, the only candidates for dark
matter particles are sterile right-handed neutrinos with masses of a few keV.
Requiring that these neutrinos explain entirely the (warm) dark matter, we find
that their number is at least three. We show that, in the minimal choice of
three sterile neutrinos, the mass of the lightest active neutrino is smaller
than ${\cal O}(10^{-5})$ eV, which excludes the degenerate mass spectra of
three active neutrinos and fixes the absolute mass scale of the other two
active neutrinos.


title:
Chiral coupled channel dynamics of the Lambda(1520) and the K-P -> pi0
  pi0 Lambda reaction

abstract:
  We study the $\Lambda(1520)D_{03}$ in a chiral coupled channel approach. This
resonance appears as dynamically generated from the interaction of the decuplet
of baryons and the octet of mesons in s-wave, and its treatment is improved
here with the phenomenological inclusion of the $\bar{K} N$ and $\pi \Sigma$
channels in d-wave. Since the most important building block in the
$\Lambda(1520)$ is the $\pi \Sgs(1385)P_{13}$ channel, we study the $K^- p \to
\pi \Sgs(1385) (\pi^0 \Lambda)$ reaction in the region of the $\Lambda(1520)$
and above, and compare the results with recent experimental data. With the
coupling of the $\Lambda(1520)$ to the $\pi \Sgs$ channel predicted by the
theory we find a cross section in good agreement with the data and there is as
well agreement for the invariant mass distributions which show a neat peak for
the $\Sgs(1385)$ in the $(\pi^0 \Lambda)$ spectrum. Predictions are made of a
strong $\Lambda(1520)$ resonant peak of the cross section, as a function of the
$K^-$ momentum, in the region below the measured data which, if confirmed
experimentally, would give a stronger support to the idea of the
$\Lambda(1520)$ as a dynamically generated resonance.


title: On the discovery potential of the lightest MSSM Higgs Boson at the LHC

abstract:
  Production of the lightest MSSM Higgs boson h is studied at the LHC. Isorate
contours for the h -> gamma gamma and h -> tau+tau- decay channels are shown in
the m_A,tan(beta) parameter space. Effects of the SUSY parameters, in
particular the stop mixing and stop quark mass, are investigated. Search
strategies at the LHC are discussed and the discovery potential is calculated
for the CMS experiment. The MSSM parameter space for m_A > 150-200 GeV is
expected to be covered with at least one decay channel with an integrated
luminosity of 60 fb^{-1}. A light stop quark with large stop mixing can affect
seriously the discovery potential in the h -> gamma gamma and h -> ZZ* decay
channels.


title: Status and Phenomenology of the Standard Model

abstract:
  The status of the new standard model is briefly surveyed, with emphasis on
experimental tests, unique features, theoretical problems, necessary
extensions, and possible TeV signatures of Planck scale physics.


title: Tri-N-ification

abstract:
  We consider a natural generalization of trinification to theories with 3N
SU(3) gauge groups. These theories have a simple moose representation and a
gauge boson spectrum that can be interpreted via the deconstruction of a 5D
theory with unified symmetry broken on a boundary. Although the matter and
Higgs sectors of the theory have no simple extra-dimensional analog, gauge
unification retains features characteristic of the 5D theory. We determine
possible assignments of the matter and Higgs fields to unified multiplets and
present theories that are viable alternatives to minimal trinified GUTs.


title:
About higher order epsilon-expansion of some massive two- and three-loop
  master-integrals

abstract:
  For certain dimensionally-regulated massive two- and three-loop
propagator-type diagrams the higher order epsilon-expansion is constructed.


title: D-term inflation in D-brane cosmology

abstract:
  We consider hybrid inflation in the braneworld scenario. In particular, we
consider inflation in global supersymmetry with the D-terms in the scalar
potential for the inflaton field to be the dominant ones (D-term inflation). We
find that D-term dominated inflation can naturally accomodate all requirements
of the successful hybrid inflationary model also in the framework of D-brane
cosmology with global supersymmetry. The reheating temperature after inflation
can be high enough ($\sim 10^{10} GeV$) for successful thermal leptogenesis.


title:
Difference in B^+ and B^0 Direct CP Asymmetry as Effect of a Fourth
  Generation

abstract:
  Direct CP violation in B^0-> K^+\pi^- decay has emerged at -10% level, but
the asymmetry in B^+ -> K^+\pi^0 mode is consistent with zero. This difference
points towards possible New Physics in the electroweak penguin operator. We
point out that a sequential fourth generation, with sizable V^*_{t's}V_{t'b}
and near maximal phase, could be a natural cause. We use the perturbative QCD
factorization approach for B-> K\pi amplitudes. While the B^0-> K^+\pi^- mode
is insensitive to t', we critically compare t' effects on direct CP violation
in B^+ -> K^+\pi^0 with b-> s\ell^+\ell^- and B_s mixing. If the
K^+\pi^0-K^+\pi^- asymmetry difference persists, we predict \sin2\Phi_{B_s} to
be negative.


title:
Magnetic moment of the pentaquark $\Theta^+(1540) $ with light-cone QCD
  sum rules

abstract:
  In this article, we study the magnetic moment of the pentaquark state $
\Theta^+(1540)$ as diquark-diquark-antiquark ($[ud][ud]\bar{s}$) state in the
framework of the light-cone QCD sum rules approach. The numerical results
indicate the magnetic moment of the pentaquark state $ \Theta^+(1540)$ is about
$\mu_{\Theta^+}=-(0.49\pm 0.06)\mu_N$.


title: Lepton generation-weighting factors and neutrino mass formula

abstract:
  A candidate for the simple empirical neutrino mass formula is found,
predicting the mass proportion m_1:m_2:m_3 = 0:4:24 and so, the mass ratio
Delta m^2_{32}/Delta m^2_{21} = 35 not inconsistent with its experimental
estimate. It involves only one free parameter and three generation-weighting
factors suggested by the successful mass formula found previously for charged
leptons (the simplest neutrino mass formula would predict m_1:m_2:m_3 = 1:4:24
and thus, Delta m^2_{32}/Delta m^2_{21} \simeq 37). A more involved variation
of this equation follows from a special seesaw neutrino model with specifically
"conspiring" Dirac and Majorana neutrino mass matrices. In this variation
m_1:m_2:m_3 \simeq \epsilon^{(\nu)}:4:24, where O(\epsilon^{(\nu)}) = 10^{-3}.


title:
Measurement of the H/A -> tau tau cross section and possible constraints
  on tan beta

abstract:
  The achievable precision of the cross section times branching ratio
measurement from the event rates is estimated for the MSSM H/A -> tau tau decay
in the associated production process gg -> b bbar H/A at large tan beta in CMS.
This work demonstrates that the above production and decay process exhibit a
large sensitivity to tan beta and thus add as a significant observable to a
global fit of the SUSY parameters. To illustrate this potential an example is
given concerning the achievable tan beta determination accuracy that could be
reached from the event rates and for a given set of SUSY parameters and
uncertainties.


title: Comment on soft-pion emission in DVCS

abstract:
  The soft-pion theorem for pion production in deeply virtual Compton
scattering, derived by Guichon, Mosse and Vanderhaegen, is shown to be
consistent with chiral perturbation theory. Chiral symmetry requires that the
nonsinglet operators corresponding to spin-independent and spin-dependent
parton distributions have the same anomalous dimensions in cases where those
operators are related by chiral transformations. In chiral perturbation theory,
their scale-dependences can thus be absorbed in the coefficents of the
corresponding effective operators, without affecting their chiral structures.


title: Charmless decays B->pipi, piK and KK in broken SU(3)symmetry

abstract:
  Charmless B decay modes $B \to \pi \pi, \pi K$ and $KK$ aresystematically
investigated with and without flavor SU(3) symmetry. Independent analyses on
$\pi \pi$ and $\pi K$ modes both favor a large ratio between color-suppressed
tree ($C$) and tree ($T)$ diagram, which suggests that they are more likely to
originate from long distance effects. The sizes of QCD penguin diagrams
extracted individually from $\pi\pi$, $\pi K$ and $KK$ modes are found to
follow a pattern of SU(3) breaking in agreement with the naive factorization
estimates. Global fits to these modes are done under various scenarios of
SU(3)relations. The results show good determinations of weak phase $\gamma$ in
consistency with the Standard Model (SM), but a large electro-weak penguin
$(P_{\tmop{EW}})$ relative to $T + C$ with a large relative strong phase are
favored, which requires an big enhancement of color suppressed electro-weak
penguin ($P_{\tmop{EW}}^C$) compatible in size but destructively interfering
with $P_{\tmop{EW}}$ within the SM, or implies new physics. Possibility of
sizable contributions from nonfactorizable diagrams such as $W$-exchange ($E$),
annihilation($A$) and penguin-annihilation diagrams($P_A$) are investigated.
The implications to the branching ratios and CP violations in $K K$modes are
discussed.


title: Higgs Phenomenology in Supersymmetric SU(3)C x SU(3)L x U(1)X

abstract:
  We build a supersymmetric version of a recently proposed SU(3)xSU(3)xU(1)X
model with heavy charged lepton and no bilepton gauge bosons.The model is an
anomaly free, three generation extension of the Standard model with SU(3)L x
U(1)gauge symmetry.The scalar sector of the 3-3-1 model is analyzed to obtain
mass spectra for neutral and charged Higgs bosons and their interactions with
gauge bosons,quarks,leptons.The tree-level decay width of Higgs bosons at TeV
energies is presented.


title: Neutrino Mass Hierarchy, Vacuum Oscillations, and Vanishing U_e3

abstract:
  Is the relatively isolated member of the neutrino mass spectrum heavier or
lighter than the two closely-spaced members? This question - the character of
the neutrino mass hierarchy - is of great theoretical interest. All previously
identified experiments for addressing it via neutrino oscillations require that
the currently unknown size of the U_e3 element of the leptonic mixing matrix
(parameterized by the unknown theta_13 mixing angle) be sufficiently large, and
will utterly fail in the limit theta_13=0. For this reason, we explore
alternative oscillation approaches that would still succeed even if theta_13
vanishes. We identify several alternatives that require neither a nonzero
|U_e3| nor the presence of significant matter effects. All include multiple
percent-level neutrino oscillation measurements, usually involving
muon-neutrino (or antineutrino) disappearance and very long baselines. We
comment on the degree of promise that these alternative approaches show.


title: Quintessential Kination and Cold Dark Matter Abundance

abstract:
  The generation of a kination-dominated phase by a quintessential exponential
model is investigated and the parameters of the model are restricted so that a
number of observational constraints (originating from nucleosynthesis, the
present acceleration of the universe and the dark-energy-density parameter) are
satisfied. The decoupling of a thermal cold dark matter particle during the
period of kination is analyzed, the relic density is calculated both
numerically and semi-analytically and the results are compared with each other.
It is argued that the enhancement, with respect to the standard paradigm, of
the cold dark matter abundance can be expressed as a function of the
quintessential density parameter at the onset of nucleosynthesis. We find that
values of the latter quantity close to its upper bound require the
thermal-averaged cross section times the velocity of the cold relic to be
almost three orders of magnitude larger than this needed in the standard
scenario so as compatibility with the cold dark matter constraint is achieved.


title:
Simulations of the End of Supersymmetric Hybrid Inflation and
  Non-Topological Soliton Formation

abstract:
  We present two- and three-dimensional simulations of the growth of quantum
fluctuations of the scalar fields in supersymmetric hybrid inflation models.
For a natural range of couplings, sub-horizon quantum fluctuations undergo
rapid growth due to scalar field dynamics, resulting in the formation of
quasi-stable non-topological solitons (inflaton condensate lumps) which
dominate the post-inflation era.


title:
Photonic measurements of the longitudinal expansion dynamics in
  Heavy-Ion collisions

abstract:
  Due to the smallness of the electromagnetic coupling, photons escape from the
hot and dense matter created in an heavy-ion collision at all times, in
contrast to hadrons which are predominantly emitted in the final freeze-out
phase of the evolving system. Thus, the thermal photon yield carries an imprint
from the early evolution. We suggest how this fact can be used to gain
information about where between the two limiting cases of Bjorken
(boost-invariant expansion) and Landau (complete initial stopping and
re-expansion) hydrodynamics the actual evolution can be found. We argue that
both the rapidity dependence of the photon yield and photonic HBT radii are
capable of answering this question.


title: Perturbative corrections to semileptonic b decay distributions

abstract:
  We compute O(alpha_s) and O(alpha_s^n beta_0^{n-1}) (BLM) corrections to the
five structure functions relevant for b->q l nu decays and apply the results to
the moments of a few distributions of phenomenological importance. We present
compact analytic one-loop formulae for the structure functions, with proper
subtraction of the soft divergence.


title:
Neutrino Masses in the Effective Rank-5 Subgroups of E_6 II:
  Supersymmetric Case

abstract:
  We present a complete analysis of the neutral fermion sector of
supersymmetric E_6-inspired low energy models containing an extra SU(2),
concentrating on the Alternate Left-Right and Inert models. We show that the
R-parity conserving scenario always exhibits a large Dirac mass for \nu_L with
maximal mixing with an isosinglet neutrino, and that R-parity violating
scenarios do not change the picture other than allowing further mixing with
another isosinglet. In order to recover Standard Model phenomenology,
additional assumptions in the form of discrete symmetries and/or new
interactions are needed. We introduce and investigate Discrete Symmetry method
and Higher Dimensional Operators as mechanisms for solving the neutrino mass
and mixing problems in these models.


title: Charge Transfer Fluctuations as a Signal for QGP

abstract:
  In this work, the charge transfer fluctuation which was previously used for
$pp$ collisions is proposed for relativistic heavy-ion collisions as a QGP
probe. We propose the appearance of a local minimum at midrapidity for the
charge transfer fluctuation as a signal for a QGP. Within a two-component
neutral cluster model, we demonstrate that the charge transfer fluctuation can
detect the presence of a QGP as well as the size of the QGP in the rapidity
space. We also show that the forward-backward correlation of multiplicity can
be a similarly good measure of the presence of a QGP. Further, we show that the
previously proposed net charge fluctuation is sensitive to the existence of the
second phase only if the QGP phase occupies a large portion of the available
rapidity space.


title: Neutrinos Have Mass - So What?

abstract:
  In this brief review, I discuss the new physics unveiled by neutrino
oscillation experiments over the past several years, and discuss several
attempts at understanding the mechanism behind neutrino masses and lepton
mixing. It is fair to say that, while significant theoretical progress has been
made, we are yet to construct a coherent picture that naturally explains
non-zero, yet tiny, neutrino masses and the newly revealed, puzzling patterns
of lepton mixing. I discuss what the challenges are, and point to the fact that
more experimental input (from both neutrino and non-neutrino experiments) is
dearly required - and that new data is expected to reveal, in the next several
years, new information. Finally, I draw attention to the fact that neutrinos
may have only just begun to reshape fundamental physics, given the fact that we
are still to explain the LSND anomaly and because the neutrino oscillation
phenomenon is ultimately sensitive to very small new-physics effects.


title: Apacic++ 2.0, A Parton Cascade In C++

abstract:
  The new version of the parton shower module APACIC++ for the SHERPA event
generator framework is presented. It incorporates some features, that are
specific for the consistent merging with multi-particle matrix elements at
tree-level. This publication also includes some exemplary results and a short
description of the upgraded class structure of APACIC++, version 2.0.


title: CP violation in Supesymmetry and the LHC

abstract:
  In this talk I discuss possibilities of probing the CP violation (CPV) in the
Minimal Supersymmetric Standard Model (MSSM), at the LHC as well as its effects
on the LHC SUSY phenomenology. In the latter case I mainly discuss its effect
on the Higgs-sector and hence on Higgs Phenomenology at the LHC. After
outlining the possibilities that a study of the $\ch_1 \nt_2$ production at the
LHC might offer, I will summarise the effects of the CPV in MSSM on the Higgs
searches at the LHC. Further, I will discuss how a study of the process $H^\pm
\to W^+ \phi_1$ may be able to plug a 'hole" in the $\tan \beta$-$\mh{+}$
plane, where the LEP has no sensitivity and where the searches in the usual
discovery channels at the LHC are likely to fail as well.


title:
Jet Physics in Heavy Ion Collisions with Compact Muon Solenoid detector
  at the LHC

abstract:
  The status of CMS jet simulations and physics analysis in heavy ion
collisions is presented. Jet reconstruction and high transverse momentum
particle tracking in the high multiplicity environment of heavy ion collisions
at the LHC using the CMS calorimetry and tracking system are described. The
Monte Carlo tools used to simulate jet quenching are discussed.


title: CP violation in semileptonic tau lepton decays

abstract:
  The leading order contribution to the direct CP asymmetry in tau^{+/-} ->
K^{+/-} pi^0 nu_{tau} decay rates is evaluated within the Standard Model. The
weak phase required for CP violation is introduced through an interesting
mechanism involving second order weak interactions, which is also responsible
for tiny violations of the Delta S= Delta Q rule in K_{l3} decays. The
calculated CP asymmetry turns out to be of order 10^{-12}, leaving a large
window for studying effects of non-standard sources of CP violation in this
observable.


title: Possibility of Large EW Penguin contribution

abstract:
  We discuss a possibility of large electroweak(EW) penguin contribution in
B-->K pi and pi pi. The recent experimental data may be still suggesting that
there are some discrepancies between the data and theoretical estimations. In B
--> K pi decays, to explain several theoretical relations among the branching
ratios, a slightly large electroweak penguin contribution and large strong
phase differences or quite large color suppressed tree contribution seem to be
needed. The contributions should appear also in B --> pi pi. We show, as an
example, a solution to solve the discrepancies in both B --> K pi and B --> pi
pi. It may be suggesting to need the large electroweak penguin contribution
with new weak phases and some SU(3) breaking effects by new physics in both QCD
and electroweak penguin type processes.


title:
Do two flavour oscillations explain both KamLAND data and the Solar
  Neutrino Spectrum?

abstract:
  The recent measurement of Delta_{sol} by the KamLAND experiment with very
small errors, makes definitive predictions for the energy dependence of the
solar neutrino survival probability P_{ee}. We fix Delta_{sol} to be the
KamLAND best fit value of 8*10^{-5} eV^2 and study the energy dependence of
P_{ee} for solar neutrinos in the framework of two flavour oscillations and
also of three flavour oscillations. For the case of two flavour oscillations,
P_{ee} has a measurable slope in the 5-8 MeV range but the solar spectrum
measurements in this range find P_{ee} to be flat. The predicted values of
P_{ee}, even for the best fit value of theta_{sol}, differ by 2 to 3 sigma from
the Super-K measured values in each of the three energy bins of the 5-8 MeV
range. If future measurements of solar neutrinos by Super-K and SNO find a flat
spectrum with reduced error bars (by a factor of 2), it will imply that two
flavour oscillations can no longer explain both KamLAND data and the solar
spectrum. However a flat solar neutrino spectrum and the Delta_{sol} measured
by KamLAND can be reconciled in a three flavour oscillation framework with a
moderate value of theta_{13} approx 13 degrees.


title: The NMSSM, Anomaly Mediation and a Dirac Bino

abstract:
  We introduce a new model of supersymmetry breaking dominated by anomaly
mediation. It has a viable spectrum, successful electroweak symmetry breaking,
solves the mu-problem and maintains the anomaly-mediated form for soft-masses
down to low energies thus solving the flavor problem. The model consists of the
minimal supersymmetric standard model plus a singlet, anomaly-mediated soft
masses and a dirac mass which marries the bino to the singlet. We describe a
large class of models in the UV which can produce such boundary conditions. The
dirac mass does not affect the so-called "UV insensitivity" of the other soft
parameters to running or supersymmetric thresholds and thus flavor physics at
intermediate scales would not reintroduce the flavor problem. The dirac bino is
integrated out at a few TeV and produces {\it finite and positive}
contributions to all hyper-charged scalars at one loop thus producing positive
squared slepton masses. The theory predicts some CP violation in the Higgs
sector leading to a correlation between the spectra to be seen at the LHC and
electric dipole moments within experimental reach in the near future.


title: Gluon-induced WW background to Higgs boson searches at the LHC

abstract:
  Vector-boson pair production is an important background for Higgs boson and
new physics searches at the Large Hadron Collider LHC. We have calculated the
loop-induced gluon-fusion process gg -> WW -> leptons, allowing for arbitrary
invariant masses of the intermediate W bosons. This process contributes at
O(alpha_s^2) relative to quark-antiquark annihilation, but its importance is
enhanced by the large gluon flux at the LHC and by experimental cuts employed
in Higgs boson searches. We find that gg -> WW provides only a moderate
correction (ca. 5%) to the inclusive W-pair production cross section at the
LHC. However, after taking into account realistic experimental cuts, the
gluon-fusion process becomes significant and increases the theoretical WW
background estimate for Higgs searches in the pp -> H -> WW -> leptons channel
by approximately 30%.