title:
Interactions between hadrons are strongly modified near the QCD
  (tri)critical point

abstract:
  The QCD (tri)critical point, a genuine second-order phase transition, implies
existence of a massless scalar mode, and singular behavior near it. In this
work we however focus on the finite region around it, defined by a condition
$m_\sigma=2m_\pi$. We point out that in this region the inter-hadron
interaction should be dramatically changed. Light sigma should increase
attractive mean field potentials for baryons and non-Goldstone mesons. The same
effect can be observed in additional downward shift of the mass of vector
mesons $\rho,\omega,\phi$, accessible via dilepton experiments. For pions we
predict that the mean change due to light sigma is in fact a
  $repulsive$ mean potential. The implications of these effects for collective
pion and nucleon flows, radial directed and elliptic, are estimated. Finally,
we speculate tha unusual behavior of flows observed by NA49 at 40 GeV PbPb
collisions at SPS may be explained by location of the critical point region
nearby.


title: Cycloops: Dark Matter or a Monopole Problem for Brane Inflation?

abstract:
  We consider cosmic loop production by long string interactions in
cosmological models with compact extra dimensions. In the case that the compact
manifold is not simply connected, we focus on the possibility of loops wrapping
around non-trivial cycles and becoming topologically trapped. Such loops,
denoted cycloops, behave like matter in the radiation era, posing a potential
monopole problem. We calculate the number distribution and the energy density
of these objects as functions of cosmic time and use them to study cosmological
constraints imposed on simple brane inflation models. For typical choices of
parameters we find that to avoid cycloop domination before the matter-radiation
transition, the strings must be unacceptably light, namely $G\mu<10^{-18}$,
unless some mechanism to dilute the cycloops is provided. By exploring the full
parameter space however, we are able to find models with $G\mu \sim 10^{-14}$,
which is marginally consistent with brane inflation. In such models the cycloop
could provide an interesting dark matter candidate.


title: Basis-independent methods for the two-Higgs-doublet model

abstract:
  In the most general two-Higgs-doublet model (2HDM), unitary transformations
between the two Higgs fields do not change the functional form of the
Lagrangian. All physical observables of the model must therefore be independent
of such transformations (i.e., independent of the Lagrangian basis choice for
the Higgs fields). We exhibit a set of basis-independent quantities that
determine all tree-level Higgs couplings and masses. Some examples of the
basis-independent treatment of 2HDM discrete symmetries are presented. We also
note that the ratio of the neutral Higgs field vacuum expectation values,
tan(beta), is not a meaningful parameter in general, as it is basis-dependent.
Implications for the more specialized 2HDMs (e.g., the Higgs sector of the MSSM
and the so-called Type-I and Type-II 2HDMs) are explored.


title:
Effect of hard processes on momentum correlations in $pp$ and $p\bar{p}$
  collisions

abstract:
  The HBT radii extracted in p-pbar and pp collisions at SPS and Tevatron show
a clear correlation with the charged particle rapidity density. We propose to
explain the correlation using a simple model where the distance from the
initial hard parton-parton scattering to the hadronization point depends on the
energy of the partons emitted. Since the particle multiplicity is correlated
with the mean energy of the partons produced we can explain the experimental
observations without invoking scenarios that assume a thermal fireball. The
model has been applied with success to the existing experimental data both in
the magnitude and the intensity of the correlation. As well, the model has been
extended to pp collisions at the LHC energy of 14 TeV. The possibilities of a
better insight into the string spatial development using 3D HBT analysis is
discussed.


title: Neutrino Intrinsic Properties: The Neutrino-Antineutrino Relation

abstract:
  Are neutrinos their own antiparticles? We explain why they very well might
be. Then, after highlighting the fact that, to determine experimentally whether
they are or not, one must overcome the smallness of neutrino masses, we discuss
the one approach that nevertheless shows great promise. Finally, we turn to the
consequences of neutrinos being their own antiparticles. These consequences
include unusual electromagnetic properties, and manifestly CP-violating effects
from ``Majorana'' phases that have no quark analogues.


title: Strong CP: No Problem

abstract:
  Detailed analysis shows that the phase of a complex mass term of a quark does
not violate CP, while the QCD vacuum angle can naturally be set equal to zero.
There is no strong CP problem and no need for axions or similar speculative
constructions to be experimentally looked for.


title:
Numerical evidence for the existence of a novel magnetic condensation in
  Yang-Mills theory

abstract:
  We present a first numerical evidence for the existence of a novel magnetic
condensate proposed recently by one of the authors in SU(2) Yang-Mills theory.
In our framework, the spontaneously generated color magnetic field identified
with the Savvidy vacuum has the microscopic origin and is a consequence of the
intrinsic dynamics of the Yang-Mills theory. It strongly suggests the
Nielsen--Olesen instability of the Savvidy vacuum disappears and the stability
is restored without the need of the Copenhagen vacuum. The implications to the
Faddeev-Skyrme model are also discussed. These results are obtained through the
first implementation of the Cho--Faddeev--Niemi decomposition of the Yang-Mills
field on a lattice.


title: Four-Loop Singlet Contribution to the $\rho$ Parameter

abstract:
  We compute the four-loop contribution to the electroweak $\rho$ parameter
induced by the singlet diagrams of the $Z$-boson self-energy. The numerical
impact on the weak mixing angle and the $W$-boson mass is small.


title: Structure of light and heavy pentaquarks

abstract:
  Light and heavy pentaquarks are described within a constituent quark model
based on a spin-flavor hyperfine interaction. In this model the lowest state
acquires positive parity. The masses of the light antidecuplet members are
calculated dynamically using a variational method. It is shown that the octet
and antidecuplet states with the same quantum numbers mix ideally due to
SU(3)$_F$ breaking. Masses of the charmed antisextet pentaquarks are predicted
within the same model.


title:
Nonlinear k_\perp-factorization for Quark-Gluon Dijet Production off
  Nuclei

abstract:
  The breaking of conventional linear k_\perp-factorization for hard processes
in a nuclear environment is by now well established. Here we report a detailed
derivation of the nonlinear k_\perp-factorization relations for the production
of quark-gluon dijets. This process is of direct relevance to dijets in the
proton hemisphere of proton-nucleus collisions at energies of the Relativistic
Heavy Ion Collider (RHIC). The major technical problem is a consistent
description of the non-Abelian intranuclear evolution of multiparton systems of
color dipoles. Following the technique developed in our early work [ N.N.
Nikolaev, W. Sch\"afer, B.G. Zakharov and V.R. Zoller, J. Exp. Theor. Phys.\
{\bf 97} (2003) 441], we reduce the description of the intranuclear evolution
of the $qgg\bar{q}$ state to the system of three coupled-channel equations in
the space of color singlet 4-parton states $\ket{3\bar{3}}, \ket{6\bar{6}}$ and
$\ket{15\bar{15}}$ (and their large-N_c generalizations). At large number of
colors N_c, the eigenstate $(\ket{6\bar{6}}-\ket{15\bar{15}})/\sqrt{2}$
decouples from the initial state $\ket{3\bar{3}}$. The resulting nuclear
distortions of the dijet spectrum exhibit much similarity to those found
earlier for forward dijets in Deep Inelastic Scattering (DIS). Still there are
certain distinctions regarding the contribution from color-triplet $qg$ final
states and from coherent diffraction excitation of dijets. To the large-N_c
approximation, we identify four universality classes of nonlinear
k_\perp-factorization for hard dijet production.


title: D^0, D^+, D_s^+, and Lambda_c^+ Fragmentation Functions from CERN LEP1

abstract:
  We present new sets of nonperturbative fragmentation functions for D^0, D^+,
and D_s^+ mesons as well as for Lambda_c^+ baryons, both at leading and
next-to-leading order in the MSbar factorization scheme with five massless
quark flavors. They are determined by fitting data of e^+e^- annihilation taken
by the OPAL Collaboration at CERN LEP1. We take the charm-quark fragmentation
function to be of the form proposed by Peterson et al. and thus obtain new
values of the epsilon_c parameter, which are specific for our choice of
factorization scheme.


title: New cosmological mass limit on thermal relic axions

abstract:
  Observations of the cosmological large-scale structure provide
well-established neutrino mass limits. We extend this argument to thermal relic
axions. We calculate the axion thermal freeze-out temperature and thus their
cosmological abundance on the basis of their interaction with pions. For
hadronic axions we find a new mass limit $m_a<1.05$ eV (95% CL), corresponding
to a limit on the axion decay constant of $f_a>5.7\times 10^6$ GeV. For other
models this constraint is significantly weakened only if the axion-pion
coupling is strongly suppressed. For comparison we note that the same approach
leads to $\sum m_\nu<0.65$ eV (95% CL) for neutrinos.


title:
A New Strong Interaction Sector as the origin for the Dark Energy and
  Dark Matter

abstract:
  A new strong interaction sector is proposed as a possible origin for the Dark
Energy and Dark matter. It is described by an unbroken gauge group $SU(2)_Z$
which grows strong at a scale $\Lambda_Z \sim 10^{-3} eV$ provided its coupling
is of the order of the electroweak coupling at some high energy scale (either
$\sim 10^{16} GeV$ or $\sim O(TeV)$ . The present vacuum energy which is
consistent with a cosmological constant is related to $\Lambda_Z$ and one of
the $SU(2)_Z$ ``matter fields'' provides a candidate for the Dark Matter in the
form of a weakly interacting massive particle (WIMP) with an annihilation cross
section naturally of the order of the electroweak one at the time of its
decoupling.


title:
Solving the neutrino parameter degeneracy by measuring the T2K off-axis
  beam in Korea

abstract:
  The T2K neutrino oscillation experiment will start in 2009. In this
experiment the center of the neutrino beam from J-PARC at Tokai village will go
through underground beneath Super-Kamiokande, reach the sea level east of
Korean shore, and an off-axis beam at $0.5^{\circ}$ to $1.0^{\circ}$ can be
observed in Korea. We study physics impacts of putting a 100 kt-level Water
\cerenkov detector in Korea during the T2K experimental period. For a
combination of the $3^{\circ}$ off-axis beam at SK with baseline length L = 295
km and the $0.5^{\circ}$ off-axis beam in the east coast of Korea at L = 1000
km, we find that the neutrino mass hierarchy (the sign of $m^2_{3} - m^2_1$)
can be resolved and the CP phase of the MNS unitary matrix can be constrained
uniquely at 3-$\sigma$ level when \sin^2 2\theta_{\rm rct} $ \ge 0.06 $.


title: Rephasing Invariant Parametrization of Flavor Mixing Matrices

abstract:
  The three-flavor mixing matrix can be parameterized by the rephasing
invariants Gamma_{ijk} = V_{1i} V_{2j} V_{3k}. This formulation brings out the
inherent symmetry of the problem and has some appealing features. Examples
illustrating the parametrization and applications to quark mixing are
presented.


title: On shielding of nuclear electric dipole moments in atoms

abstract:
  We demonstrate explicitly that some recent calculations of atomic electric
dipole moments (EDM) are incomplete. A contribution overlooked therein is
pointed out. When included, it cancels exactly the result of those
calculations, and thus restores the standard conclusions for nuclear EDM in
atoms.


title:
Birefringence effect in the nuclear pseudoelectric field of matter and
  an external electric field for a deuteron (nucleus) rotating in a storage
  ring

abstract:
  The birefringence effect in the nuclear pseudoelectric field of matter and an
external electric field for a particle (deuteron, nucleus) moving in a storage
ring is discussed. The influence of the birefringence effect on the EDM
measurement experiments is considered. The attention is drawn to the
possibility to measure the spin-dependent amplitude of the elastic coherent
scattering of a deuteron by a nucleus, the electric polarizability of a
deuteron (nucleus). Using a gas target with polarized nuclei also allows to
study P-,T-odd interactions.


title: The Horn and the Thermal Model

abstract:
  The recently discovered sharp peak in the K+/pi+ ratio in relativistic
heavy-ion collisions is discussed in the framework of the thermal model. In
this model a rapid change is expected as the hadronic gas undergoes a
transition from a baryon-dominated to a meson-dominated gas. The transition
occurs at a temperature T = 140 MeV and baryon chemical potential muB = 410 MeV
corresponding to an incident energy of 8.2 GeV.


title: Large neutrino mixing angles for type-I see-saw mechanism in SO(10) GUT

abstract:
  We consider the neutrino mixing angles in an SO(10) GUT with the usual Higgs
structure in which neutrino masses are explained by the type-I see-saw
mechanism. The Dirac-neutrino Yukawa matrix then has a structure similar to
that of the $u$-quark. We determine the light neutrino mass matrix through
type-I see-saw mechanism using the experimentally consistent $u$-quark Yukawa
matrix. We find that large neutrino mixing-angles emerge naturally in this
model.


title:
On the relations between two-photon and leptonic widths of low-lying
  S-wave states of charmonium

abstract:
  The relation between the ratio Gamma_{ee}(psi')/Gamma_{ee}(J/psi) and
Gamma_{2gamma}(eta_{c}')/Gamma_{2gamma}(eta_{c}), expressed in terms of the
configuration mixing amplitudes induced by the contact spin-spin interaction of
quarks in the ground and radial excitation states, is shown to give, after the
inclusion of the newly derived relativistic corrections, the radiative
eta_{c}'- and \eta_c-width ratio in fair accord with recent experiments. The
dynamical model is proposed to derive the ratio of relative probability of the
ground (eta_{c}(2980))- and first radial excitation (eta_{c}'(3640))-state
formation in gamma-gamma collisions followed by their decay into the pi\bar{K}K
and p\bar{p} channels.


title:
Investigation of Possible Dark Matter Direct Detection in Electron
  Accelerators

abstract:
  We investigate a possibility of neutralino dark matter (DM) direct detection
in the future electron accelerators. That is counting of high p_T electron
recoil events by neutralinos in halo. If selectron and neutralino masses would
be precisely measured in future collider experiments, the beam energy could be
tuned so that the scatterings are dominated by on-pole selectron exchange. When
selectron and neutralino mass difference is smaller than O(10) GeV, the elastic
cross section exceeds over micro barn. Discovery of the high p_T electron
events would be a firm prove of the neutralino DM component in halo. In the
experiment, the electron beam energy must be tuned within O(10) MeV and the
electron beam with high currents of O(100)A is required for the detectors of
the total length of a few hundred meters so that the sufficient event rate is
obtained. The dependence of the event rate on the DM velocity distribution in
halo is also discussed. This method might be applicable to other DM candidates.


title: Low Energy Solar Neutrinos and Spin Flavour Precession

abstract:
  The possibility that the Gallium data effectively indicates a time modulation
of the solar active neutrino flux in possible connection to solar activity is
examined on the light of spin flavour precession to sterile neutrinos as a
subdominant process in addition to oscillations. We distinguish two sets of
Gallium data, relating them to high and low solar activity. Such modulation
affects principally the low energy neutrinos ($pp$ and $^7 Be$) so that the
effect, if it exists, will become most clear in the forthcoming Borexino and
LENS experiments and will provide evidence for a neutrino magnetic moment.
Using a model previously developed, we perform two separate fits in relation to
low and high activity periods to all solar neutrino data. These fits include
the very recent charged current spectrum from the SNO experiment. We also
derive the model predictions for Borexino and LENS experiments.


title:
Soft-Gluon Production Due to a Gluon Loop in a Constant Chromo-Electric
  Background Field

abstract:
  We obtain an exact result for the soft gluon production and its p_T
distribution due to a gluon loop in a constant chromo-electric background field
E^a with arbitrary color. Unlike Schwinger's result for e^+e^- pair production
in QED which depends only on one gauge invariant quantity, the Electric field
E, we find that the p_T distribution of the gluons depend on two gauge
invariant quantities, E^aE^a and [d_{abc}E^aE^bE^c]^2.


title: Theory of Charmless Inclusive B Decays and the Extraction of V_{ub}

abstract:
  We present ``state-of-the-art'' theoretical expressions for the triple
differential B->X_u l^- nu decay rate and for the B->X_s gamma photon spectrum,
which incorporate all known contributions and smoothly interpolate between the
``shape-function region'' of large hadronic energy and small invariant mass,
and the ``OPE region'' in which all hadronic kinematical variables scale with
M_B. The differential rates are given in a form which has no explicit reference
to the mass of the b quark, avoiding the associated uncertainties. Dependence
on m_b enters indirectly through the properties of the leading shape function,
which can be determined by fitting the B->X_s gamma photon spectrum. This
eliminates the dominant theoretical uncertainties from predictions for B->X_u
l^- nu decay distributions, allowing for a precise determination of |V_{ub}|.
In the shape-function region, short-distance and long-distance contributions
are factorized at next-to-leading order in renormalization-group improved
perturbation theory. Higher-order power corrections include effects from
subleading shape functions where they are known. When integrated over
sufficiently large portions in phase space, our results reduce to standard OPE
expressions up to yet unknown O(alpha_s^2) terms. Predictions are presented for
partial B->X_u l^- nu decay rates with various experimental cuts. An elaborate
error analysis is performed that contains all significant theoretical
uncertainties, including weak annihilation effects. We suggest that the latter
can be eliminated by imposing a cut on high lepton invariant mass.


title: Strongly Coupled Quark Gluon Plasma (SCQGP)

abstract:
  We propose that the reason for the non-ideal behavior seen in lattice
simulation of quark gluon plasma (QGP) and relativistic heavy ion collisions
(URHICs) experiments is that the QGP near T_c and above is strongly coupled
plasma (SCP), i.e., strongly coupled quark gluon plasma (SCQGP). It is
remarkable that the widely used equation of state (EoS) of SCP in QED (quantum
electrodynamics) very nicely fits lattice results on all QGP systems, with
proper modifications to include color degrees of freedom and running coupling
constant. Results on pressure in pure gauge, 2-flavors and 3-flavors QGP, are
all can be explained by treating QGP as SCQGP as demonstated here.Energy
density and speed of sound are also presented for all three systems. We further
extend the model to systems with finite quark mass and a reasonably good fit to
lattice results are obtained for (2+1)-flavors and 4-flavors QGP. Hence it is
the first unified model, namely SCQGP, to explain the non-ideal QGP seen in
lattice simulations with just two system dependent parameters.


title: Chiral Phase Transition in QCD and Vector Manifestation

abstract:
  Spontaneous chiral symmetry breaking is one of the most important features in
low-energy QCD. The chiral symmetry is expected to be restored at very high
temperature and/or density. Accompanied by the chiral phase transition,
properties of hadrons will be changed especially near the critical point. The
study of the phenomena associated with the chiral phase transition will give us
some clues on the connection between the chiral symmetry and the low-energy
hadron dynamics.
  We develop the theory based on the hidden local symmetry (HLS) at finite
temperature, which is an effective field theory of QCD and includes pions and
vector mesons as the dynamical degrees of freedom, and study the chiral phase
transition in hot matter. We show that the chiral symmetry is restored as the
vector manifestation (VM), in which the massless degenerate pion (and its
flavor partners) and the longitudinal $\rho$ meson (and its flavor partners) as
the chiral partner. We also present several predictions based on the VM. We
estimate the critical temperature $T_c$ and show the following phenomena near
$T_c$: the vector charge susceptibility becomes equal to the axial-vector
charge susceptibility; the vector dominance of the electromagnetic form factor
of the pion is largely violated; the pion velocity is close to the speed of
light. Furthermore, we show that the remnant of the VM can be clearly seen in
the system of heavy mesons. We expect that the VM and its predictions are
testable by current and future experiments and the lattice analysis.


title: Hybrid Textures of Neutrinos

abstract:
  We present numerical and comprehensive analyses of the sixty hybrid textures
of neutrinos, which have an equality of matrix elements and one zero. These
textures are possibly derived from the discrete symmetry. Only six textures
among sixty ones are excluded by the present experimental data. Since there are
many textures which give similar predictions, the textures are classified based
on the numerical results. The neutrinoless double beta decay is also examined
in these textures. Our results suggest that there remain still rich structures
of the neutrino mass matrix in the phenomenological point of view.


title: Neutrinoless Double $\beta$-Decay:The Problem of Nuclear Matrix Elements

abstract:
  The calculations of nuclear matrix elements of $0\nu\beta\beta$-decay is a
challenge for nuclear physics. We are discussing here a model independent
method, which could allow to test the calculations. The method is based on the
factorization property of the nuclear matrix elements and requires observation
of neutrinoless double $\beta$-decay of several nuclei.


title:
Transverse momentum distribution with radial flow in relativistic
  diffusion model

abstract:
  Large transverse momentum distributions of identified particles observed at
RHIC are analyzed by a relativistic stochastic model in the three dimensional
(non-Euclidean) rapidity space. A distribution function obtained from the model
is Gaussian-like in radial rapidity. It can well describe observed transverse
momentum $p_T$ distributions. Estimation of radial flow is made from the
analysis of $p_T$ distributions for $\bar{p}$ in Au + Au Collisions.
Temperatures are estimated from observed large $p_T$ distributions under the
assumption that the distribution function approaches to the Maxwell-Boltzmann
distribution in the lower momentum limit. Power-law behavior of large $p_T$
distribution is also derived from the model.


abstract:
  Mass spectra of excited meson states consisting of u-, d-quarks and
antiquarks with I = 1 are considered. The comparison between the existing
experimental data and the mass values evaluated with phenomenological formulae
is carried out. Problems of identification of vector and scalar meson excited
states are discussed.


title:
Bilepton and exotic quark mass limits in 331 models from Z -> b anti-b
  decay

abstract:
  We study the effect of new physics on the Z-decay into b anti-b pairs in the
framework of 331 models. The decay Z -> b anti-b is computed at one loop level
and, using previous results, we evaluate this branching fraction in the
framework of 331 models. A wide range of the space parameter of the model is
considered and possible deviations from the standard model predictions are
explored. From precision measurements at the Z-pole we find the allowed region
for MJ3, MX at 95 % CL.


title:
Understanding the differences in neutrino and charged-fermion flavour
  structures

abstract:
  We present a new mechanism to explain naturally and through a common flavour
symmetry the mildly hierarchical neutrino masses with large mixings and the
hierarchical Yukawa matrices with small mixing angles. Although this mechanism
is not linked to a particular flavour symmertry, it is particularly simple in
the framework of a SU(3) flavour symmetry. In this model, we obtain exactly
maximal atmospheric mixing, large although not maximal solar mixing and a
normal neutrino hierarchy. All neutrino parameters are basically fixed. For
instance, we predict that the angle $\theta_{13}$ comes entirely from the
charged lepton sector and, using the difference of the solar angle from
maximality, we can fix the mass of lightest neutrino.


title: The Balitsky-Kovchegov equation in full momentum space

abstract:
  We analyse the Balitsky-Kovchegov (BK) saturation equation in momentum space
and solve it numerically. We confirm that, in the limit where the transverse
momentum of the incident particle k is much bigger than the momentum transfer
q, the equation admits travelling-wave solutions. We extract the q dependence
of the saturation scale Q_s(Y) and verify that Q_s(Y=cste) scales as
max(q,Q_T), where Q_T is the scale caracterizing the target.


title: Cahn and Sivers effects in the target fragmentation region of SIDIS

abstract:
  LEPTO event generator is modified to describe the azimuthal modulations
arising from Cahn and Sivers effects. The comparisons with some existing data
in the current fragmentation region of SIDIS are presented. The predictions for
Cahn and Sivers asymmetries in the target fragmentation region are presented
for SIDIS of 12 GeV electrons off proton target.


title: Coupling Unifications in Gauge-Higgs Unified Orbifold Models

abstract:
  Supersymmetric gauge theories, in higher dimensions compactified in an
orbifold, give a natural framework to unify the gauge bosons, Higgs fields and
even the matter fields in a single multiplet of the unifying gauge symmetry.
The extra dimensions and the supersymmetry are the two key ingredients for such
an unification. In this work, we investigate various scenarios for the
unification of the three gauge couplings, and the Yukawa couplings in the
Minimal Supersymmetric Standard Model (MSSM), as well as the trilinear Higgs
couplings \lambda and \kappa of the Non-Minimal Supersymmetric Standard Model
(NMSSM). We present an SU(8) model in six dimensions with N=2 supersymmetry,
compactified in a T^2/Z_6 orbifold which unifies the three gauge couplings with
\lambda and \kappa of NMSSM. Then, we present an SU(9) model in 6D, which, in
addition, includes partial unification of Yukawa couplings, either for the
up-type (top quark and Dirac tau-neutrino) or down-type (bottom quark and tau
lepton). We also study the phenomenological implications of these various
unification scenarios using the appropriate renormalization group equations,
and show that such unification works very well with the measured low energy
values of the couplings. The predicted upper bounds for the lightest neutral
Higgs boson mass in our model is higher than those in MSSM, but lower that
those in the general NMSSM (where the couplings \lambda and \kappa are
arbitrary). Some of the predictions of our models can be tested in the upcoming
Large Hadron Collider.


title:
BCS-BEC crossover in a relativistic superfluid and its significance to
  quark matter

abstract:
  The character change of a superfluid state due to the variation of the
attractive force is investigated in the relativistic framework with a massive
fermion. Two crossovers are found. One is a crossover from the usual BCS state
to the Bose-Einstein condensation (BEC) of bound fermion pairs. The other is
from the BEC to the relativistic Bose-Einstein condensation (RBEC) of nearly
massless bound pairs where antiparticles as well as particles dominate the
thermodynamics. Possible realization of the BEC and RBEC states in the quark
matter is also pointed out.


title: Implications of Bbar to D0 h0 Decays on Bbar to D Kbar, Dbar Kbar Decays

abstract:
  The recently observed color suppressed B0bar to D0 pi0, D0 eta, D0 eta', Ds+
K-and D0 K0bar decay modes all have rates larger than expected, hinting at the
presence of final state interactions. We study rescattering effects in Bbar to
D P, D Kbar and Dbar Kbar modes in the quasi-elastic approach, which is
extended to accommodate D0 eta' without using U(3) symmetry. The D0bar Kbar
modes are of interest in the determination of the unitarity angle phi3/gamma.
The updated DP data are used to extract the effective Wilson coefficients
a_1^{eff} ~ 0.92, a_2^{eff} ~ 0.22, three strong phases delta ~ 62 deg., theta
~ 24 deg., sigma ~ 127 deg., and the mixing angle tau~2 deg. The values of
delta and theta are close to our previous results. The smallness of tau implies
small mixing of D0 eta1 with other modes. Predictions for D0 K-, D+ K- and D0
K0bar agree with data. The framework applies to Bbar to Dbar Kbar decays, and
rates for D0bar K-, D- K0, Ds- pi0, Ds- eta and Ds- eta' modes are predicted.
  From B- to D0bar K- and D0 K- rates, we find r_B=0.09\pm 0.02.


title: Error in Monte Carlo, quasi-error in Quasi-Monte Carlo

abstract:
  While the Quasi-Monte Carlo method of numerical integration achieves smaller
integration error than standard Monte Carlo, its use in particle physics
phenomenology has been hindered by the abscence of a reliable way to estimate
that error. The standard Monte Carlo error estimator relies on the assumption
that the points are generated independently of each other and, therefore, fails
to account for the error improvement advertised by the Quasi-Monte Carlo
method. We advocate the construction of an estimator of stochastic nature,
based on the ensemble of pointsets with a particular discrepancy value. We
investigate the consequences of this choice and give some first empirical
results on the suggested estimators.


title:
Exclusive Higgs and dijet production by double pomeron exchange. The CDF
  upper limits

abstract:
  We use as a starting point the original, central inclusive Bialas-Landshoff
model for Higgs and dijet production by a double pomeron exchange in pp
collisions. Next we propose the simple extension of this model to the exclusive
processes. We find the extended model to be consistent with the CDF Run I, II
upper limits for double diffractive exclusive dijet production. The predictions
for the exclusive Higgs boson production cross sections at the Tevatron and the
LHC energies are also presented.


title: Ds+ -- Ds- Asymmetry in Photoproduction

abstract:
  Considering of the possible difference in strange and antistrange quark
distributions inside nucleon, we investigate the Ds+ -- Ds- asymmetry in
photoproduction in the framework of heavy-quark recombination mechanism. We
adopt two distribution models of strange sea, those are the light-cone
meson-baryon fluctuation model and the effective chiral quark model. Our
results show that the asymmetry induced by the strange quark distributions is
distinct, which is measurable in experiments. And, there are evident
differences between the predictions of our calculation and previous estimation.
Therefore, the experimental measurements on the Ds+ -- Ds- asymmetry may impose
a unique restriction on the strange-antistrange distribution asymmetry models.


title: Light-cone sum rules in soft-collinear effective theory

abstract:
  We derive light-cone sum rules (LCSRs) for exclusive B-meson decays into
light energetic hadrons from correlation functions within soft-collinear
effective theory (SCET). In these sum rules the short-distance scale refers to
``hard-collinear'' interactions with virtualities of order (Lambda_{QCD}*m_b).
Hard scales (related to virtualities of order m_b^2) are integrated out and
enter via external coefficient functions in the sum rule. Soft dynamics is
encoded in light-cone distribution amplitudes for the B-meson, which describe
both the factorizable and non-factorizable contributions to exclusive B-meson
decay amplitudes. As an example, we provide a detailed study of the SCET sum
rule for the B -> pi transition form factor at large recoil, including
radiative corrections from hard-collinear loop diagrams at first order in the
strong coupling constant. We find remarkable conceptual and numerical
differences with the heavy-quark limit of the conventional LCSR approach in
QCD.


title:
Scale dependence of heavy quark production in pp and $\bar{\mathbf{p}}$p
  collisions - transverse momentum dependence

abstract:
  The dependence of the differential cross section
${\mathrm{d}\sigma}/{\mathrm{d}p_{\perp}}$ of inclusive heavy quark production
in pp and $\bar{\mathrm{p}}$p collisions on the renormalization and
factorization scales is investigated. The implications of our results for
experiments at TEVATRON and LHC are discussed. In particular, it is shown that
the NLO QCD predictions for $\bar{t}t$ production at the LHC based on the
Principle of Minimal Sensitivity are by 30-50% higher than the standard ones.


title: Neutralino Dark Matter in mSUGRA: reopening the light Higgs pole window

abstract:
  The requirement that the lightest neutralino $\tilde\chi_1^0$ has the right
thermal relic density to explain all Dark Matter in the universe strongly
constrains the parameter space of supersymmetric models in general, and of the
mSUGRA model in particular. Recently improved calculations of the mass of the
light CP-even Higgs boson $h$ present in this model, and the increased central
value of the mass of the top quark, have re--opened the possibility that $2
\mlsp \lsim m_h$. In this ``$h-$pole region'' the LSP annihilation cross
section is enhanced by near-resonant $h$ exchange in the $s-$channel, reducing
the relic density to acceptable values. We delineate the corresponding region
of mSUGRA parameter space, and explore its phenomenology. In particular, we
find strong upper bounds on the masses of the gluino, lighter chargino and LSP.


title: $B$-Meson Distribution Amplitude from the $B\to \pi$ Form Factor

abstract:
  Employing the light-cone sum rule approach in QCD, we relate the $B$-meson
distribution amplitude to the $B\to \pi$ form factor at zero momentum transfer.
In leading order, the sum rule is converted into a simple expression for the
inverse moment $\lambda_B$ of the distribution amplitude $\phi_{+}^B$. Using as
an input the $B\to\pi$ form factor calculated from the light-cone sum rule in
terms of pion distribution amplitudes, we obtain an estimate: $\lambda_B =460
\pm 160 $ MeV. We investigate how this result is modified by the $B$-meson
three-particle distribution amplitudes.


title:
Three-loop electroweak corrections to the W-boson mass and sin^2
  theta_eff in the large Higgs mass limit

abstract:
  We present an analytical calculation of the leading three-loop radiative
correction to the S-parameter in the Standard Model in the large Higgs mass
limit. Numerically, S^(3) = 1.1105*g^4/(1024 pi^3)*m_H^4/M_W^4. When combined
with the corresponding three-loop correction to the rho-parameter, this leads
to shifts of Delta^(3) sin^2 theta_eff = 4.6*10^-9*m_H^4/M_W^4 in the effective
weak mixing angle and Delta^(3) M_W = -6.3*10^-4*MeV*m_H^4/M_W^4 in the W boson
mass. For both of these observables, the sign of the three-loop correction is
equal to that of the one-loop correction.


title:
Non-Canonical Gauge Coupling Unification in High-Scale Supersymmetry
  Breaking

abstract:
  The string landscape suggests that the supersymmetry breaking scale can be
high, and then the simplest low energy effective theory is the Standard Model
(SM). Considering grand unification scale supersymmetry breaking, we show that
gauge coupling unification can be achieved at about 10^{16-17} GeV in the SM
with suitable normalizations of the U(1)_Y, and we predict that the Higgs mass
range is 127 GeV to 165 GeV, with the precise value strongly correlated with
the top quark mass m_t and SU(3)_C gauge coupling. For example, if m_t=178\pm1
GeV, the Higgs boson mass is predicted to be between 141 GeV and 154 GeV. We
also point out that gauge coupling unification in the Minimal Supersymmetric
Standard Model (MSSM) does not imply the canonical U(1)_Y normalization. In
addition, we present 7-dimensional orbifold grand unified theories (GUTs) in
which such normalizations for the U(1)_Y and charge quantization can be
realized. The supersymmetry can be broken at the grand unification scale by the
Scherk--Schwarz mechanism. We briefly comment on a non-canonical U(1)_Y
normalization due to the brane localized gauge kinetic terms in orbifold GUTs.


title: Solving the SUSY CP problem with flavor breaking F-terms

abstract:
  Supersymmetric flavor models for the radiative generation of fermion masses
offer an alternative way to solve the SUSY-CP problem. We assume that the
supersymmetric theory is flavor and CP conserving. CP violating phases are
associated to the vacuum expectation values of flavor violating susy-breaking
fields. As a consequence, phases appear at tree level only in the soft
supersymmetry breaking matrices. Using a U(2) flavor model as an example we
show that it is possible to generate radiatively the first and second
generation of quark masses and mixings as well as the CKM CP phase. The
one-loop supersymmetric contributions to EDMs are automatically zero since all
the relevant parameters in the lagrangian are flavor conserving and as a
consequence real. The size of the flavor and CP mixing in the susy breaking
sector is mostly determined by the fermion mass ratios and CKM elements. We
calculate the contributions to epsilon, epsilon^{prime} and to the CP
asymmetries in the B decays to psi Ks, phi Ks, eta^{\prime} Ks and Xs gamma. We
analyze a case study with maximal predictivity in the fermion sector. For this
worst case scenario the measurements of Delta mK, Delta mB and epsilon
constrain the model requiring extremely heavy squark spectra.


title: A Minimally Fine-Tuned Supersymmetric Standard Model

abstract:
  We construct supersymmetric theories in which the correct scale for
electroweak symmetry breaking is obtained without significant fine-tuning. We
calculate the fine-tuning parameter for these theories to be at the 20% level,
which is significantly better than in conventional supersymmetry breaking
scenarios. Supersymmetry breaking occurs at a low scale of order 100 TeV, and
is transmitted to the supersymmetric standard-model sector through
standard-model gauge interactions. The Higgs sector contains two Higgs doublets
and a singlet field, with a superpotential that takes the most general form
allowed by gauge invariance. An explicit model is constructed in 5D warped
space with supersymmetry broken on the infrared brane. We perform a detailed
analysis of electroweak symmetry breaking for this model, and demonstrate that
the fine-tuning is in fact reduced. A new candidate for dark matter is also
proposed, which arises from the extended Higgs sector of the model. Finally, we
discuss a purely 4D theory which may also significantly reduce fine-tuning.


title:
Sterile-active neutrino oscillations and shortcuts in the extra
  dimension

abstract:
  We discuss a possible new resonance in active-sterile neutrino oscillations
arising in theories with large extra dimensions. Fluctuations in the brane
effectively increase the path-length of active neutrinos relative to the
path-length of sterile neutrinos through the extra-dimensional bulk. Well below
the resonance, the standard oscillation formulas apply. Well above the
resonance, active-sterile oscillations are suppressed. We show that a resonance
energy in the range of 30-400 MeV allows an explanation of all neutrino
oscillation data, including LSND data, in a consistent four-neutrino model. A
high resonance energy implies an enhanced signal in MiniBooNE. A low resonance
energy implies a distorted energy spectrum in LSND, and an enhanced v_mu
depletion from a stopped-pion source. The numerical value of the resonance
energy may be related back to the geometric aspects of the brane world. Some
astrophysical and cosmological consequences of the brane-bulk resonance are
briefly sketched.


title: Unquenching the Quark Model and Screened Potentials

abstract:
  The low-lying spectrum of the quark model is shown to be robust under the
effects of `unquenching'. In contrast, the use of screened potentials is shown
to be of limited use in models of hadrons. Applications to unquenching the
lattice Wilson loop potential and to glueball mixing in the adiabatic hybrid
spectrum are also presented.


title:
Direct Fragmentation of Quarkonia Including Fermi Motion Using
  Light-cone Wave Function

abstract:
  We investigate the effect of Fermi motion on the direct fragmentation of the
$J/\psi$ and $\Upsilon$ states employing a light-cone wave function. Consistent
with such a wave function we set up the kinematics of a heavy quark fragmenting
into a quarkonia such that the Fermi motion of the constituents split into
longitudinal as well as transverse direction and thus calculate the
fragmentation functions for these states. In the framework of our
investigation, we estimate that the fragmentation probabilities of $J/\psi$ and
$\Upsilon$ may increase at least up to 14 percent when including this degree of
freedom.


title: Higgs Boson Searches at Hadron Colliders

abstract:
  The investigation of the dynamics responsible for electroweak symmetry
breaking is one of the prime tasks of experiments at present and future
colliders. Experiments at the Tevatron ppbar Collider and at the CERN Large
Hadron Collider (LHC) must be able to discover a Standard Model Higgs boson
over the full mass range as well as Higgs bosons in extended models. In this
review, the discovery potential for the Standard Model Higgs boson and for
Higgs bosons in the Minimal Supersymmetric extension is summarized. Emphasis is
put on those studies which have been performed recently within the experimental
collaborations using a realistic simulation of the detector performance. This
includes a discussion of the search for Higgs bosons using the vector boson
fusion mode at the LHC, a discussion on the measurement of Higgs boson
parameters as well as a detailed review of the MSSM sector for different
benchmark scenarios. The Tevatron part of the review also contains a discussion
of first physics results from data taken in the ongoing Run II.


title: Mean field baryon magnetic moments and sumrules

abstract:
  New developments have spurred interest in magnetic moments ($\mu$-s) of
baryons. The measurement of some of the decuplet $\mu$-s and the findings of
new sumrules from various methods are partly responsible for this renewed
interest. Our model, inspired by large colour approximation, is a relativistic
self consistent mean field description with a modified Richardson potential and
is used to describe the $\mu$-s and masses of all baryons with up (u), down (d)
and strange (s) quarks. We have also checked the validity of the Franklin
sumrule (referred to as CGSR in the literature) and sumrules of Luty,
March-Russell and White. We found that our result for sumrules matches better
with experiment than the non-relativistic quark model prediction. We have also
seen that quark magnetic moments depend on the baryon in which they belong
while the naive quark model expects them to be constant.


title:
Decays of Non-Strange Positive Parity Excited Baryons in the 1/Nc
  Expansion

abstract:
  The decays of non-strange positive parity excited baryons via emission of a
pseudo-scalar meson are studied in the framework of the 1/Nc expansion to order
1/Nc. In particular, the pionic decays of the l=0 Roper baryons and of the l=2
baryons in the mass interval 1680-1950 MeV are analyzed using the available
partial decay widths. Decay widths by emission of an eta meson are shown to be
suppressed by a factor 1/Nc^2 with respect to the pionic ones.


title:
Supermassive gravitinos, dark matter, leptogenesis and flat direction
  baryogenesis

abstract:
  In general the gravitino mass and/or the soft supersymmetry breaking masses
in the observable sector can be much larger than the TeV scale. Depending on
the relation between the masses, new important channels for gravitino
production in the early Universe can arise. Gravitinos with a mass above 50 TeV
decay before big bang nucleosynthesis, which leads to relaxation of the well
known bound on the reheating temperature $T_{\rm R} \leq 10^{10}$ GeV. However,
if the heavy gravitinos are produced abundantly in the early Universe, their
decay can alter the abundance of the lightest supersymmetric particle.
Moreover, they may dominate the energy density of the Universe. Their decay
will in this case increase entropy and dilute already created baryon asymmetry
and dark matter. Such considerations put new constraints on gravitino and
sfermion masses, and the reheating temperature. In this paper we examine
various cosmological consequences of supermassive gravitinos. We discuss
advnatges and disadvantages of a large reheating temperature in connection with
thermal leptogenesis, and find that large parts of the parameter space are
opened up for the lightest right-handed (s)neutrino mass. We also discuss the
viability of Affleck-Dine baryogenesis under the constraints from gravitino
decay, and gravitino production from the decay of Q-balls.


title: In-medium effects on electromagnetic probes

abstract:
  We discuss some of the aspects of the physics of relativistic nuclear
collisions, in particular those having to do with the observation of
electromagnetic radiation. We concentrate on what such measurements tell us
about the local, in-medium properties of the environment from which they
emerge. The contribution from different sources are considered: that from the
partonic sector of QCD, and that from the confined hadronic phase.
Specifically, we discuss the observation of real photons and of lepton pairs at
the SPS and at RHIC, and make predictions for the LHC. The role of jets is
discussed.


title: Quark and Lepton Masses from Deconstruction

abstract:
  We propose a supersymmetric SU(5)xSU(5) model, where the quarks and leptons
live in a U(1) product group theory space that is compactified on the real
projective plane RP^2. The fermion generations are placed on different points
in the deconstructed manifold by assigning them SO(10) compatible U(1) charges.
The observed masses and mixing angles of quarks and leptons emerge from
non-renormalizable operators involving the chiral link fields. The link fields
introduce a large atmospheric neutrino mixing angle \theta_23 via a dynamical
realization of the seesaw mechanism, which sets the deconstruction scale to a
value of the order the B-L breaking scale 10^14 GeV. Supersymmetry breaking can
be achieved through topological effects due to a non-trivial homology group
Z_2. The mixed anomalies of the link fields are canceled by Wess-Zumino terms,
which are local polynomials in the gauge and link fields only. We also comment
on the construction of Chern-Simons couplings from these fields.


title: Q-ball Instability due to U(1) Breaking

abstract:
  Q-ball is a non-topological soliton whose stability is ensured by global U(1)
symmetry. We study a Q-ball which arises in the Affleck-Dine mechanism for
baryogenesis and consider its possible instability due to U(1) breaking term
($A$-term) indispensable for successful baryogenesis. It is found that the
instability destroys the Q-ball if its growth rate exceeds inverse of the
typical relaxation time scale of the Q-ball. However, the instability is not so
strong as it obstructs the cosmological formation of the Q-balls.


title:
Observation of Observation of tensor glueball in the reactions p anti-p
  -> pi-pi, eta-eta, eta-eta'

abstract:
  Partial wave analysis of the reactions p anti-p -> pi-pi, eta-eta, eta-eta'
in the region of invariant masses 1900-2400 MeV indicates to the existence of
four relatively narrow tensor-isoscalar resonances f_2(1920), f_2(2020),
f_2(2240), f_2(2300) and the broad state f_2(2000). The determined decay
couplings of the broad resonance f_2(2000)-> pi0-pi0, eta-eta, eta-eta' satisfy
the relations appropriate to those of tensor glueball, while the couplings of
other tensor states do not, thus verifying the glueball nature of f_2(2000).


title: On the B_{c} leptonic decay constant

abstract:
  We give a review and present a comprehensive calculations for the leptonic
constant B_{c} of the low-lying pseudoscalar and vector states of B_{c}-meson
in the framework of static and QCD-motivated nonrelativistic potential models
taking into account the one-loop and two-loop QCD corrections in the short
distance coefficient that governs the leptonic constant of B_{c} quarkonium
system. Further, we use the scaling relation to predict the leptonic constant
of the nS-states of the $\bar{b%}c$ system. Our results are compared with other
models to gauge the reliability of the predictions and point out differences.


title: Monopolonium in confining phase

abstract:
  This paper has been withdrawn by the author(s), due the following reasons. A
similar system for a different purpose has already been studied in
Phys.Rev.D60:083001,1999 (astro-ph/9904315). Moreover, our analysis was wrong
because we have missed the large frictional forces that will rapidly damp out
the energy in the oscillating monopolonium system.


title:
Precise predictions for chargino and neutralino pair production in
  $e^+e^-$ annihilation

abstract:
  We present a high precision calculation of chargino and neutralino pair
production at $e^+e^-$ colliders. Within the Minimal Supersymmetric Standard
Model, the full one-loop and higher order QED corrections are included. Special
care has been taken in the definition of the Lagrangian input parameters.
Furthermore, the proper inclusion of QED corrections and the separation of weak
and QED corrections are discussed. We show numerical results for total cross
sections, as well as forward-backward and left-right asymmetries for the SPS1a'
scenario as proposed in the SPA project. The complete corrections are about 10%
and in some cases even larger, in particular for $\neu_i \neu_j$ production
with sizeable higgsino components. These corrections have to be taken into
account in a high precision analysis.


title:
Solving a Set of Truncated Dyson-Schwinger Equations with a Globally
  Converging Method

abstract:
  A globally converging numerical method to solve coupled sets of non-linear
integral equations is presented. Such systems occur e.g. in the study of
Dyson-Schwinger equations of Yang-Mills theory and QCD. The method is based on
the knowledge of the qualitative properties of the solution functions in the
far infrared and ultraviolet. Using this input, the full solutions are
constructed using a globally convergent modified Newton iteration. Two
different systems will be treated as examples: The Dyson-Schwinger equations of
3-dimensional Yang-Mills-Higgs theory provide a system of finite integrals,
while those of 4-dimensional Yang-Mills theory at high temperatures are only
finite after renormalization.


title: Two-Loop Electroweak Logarithms

abstract:
  We present the complete analytical result for the two-loop logarithmically
enhanced contributions to the high energy asymptotic behavior of the vector
form factor and the four-fermion cross section in a spontaneously broken SU(2)
gauge model. On the basis of this result we derive the dominant two-loop
electroweak corrections to the neutral current four-fermion processes at high
energies.


title: Masses of heavy baryons in the relativistic quark model

abstract:
  The masses of the ground state heavy baryons consisting of two light (u,d,s)
and one heavy (c,b) quarks are calculated in the heavy-quark--light-diquark
approximation within the constituent quark model. The light quarks, forming the
diquark, and the light diquark in the baryon are treated completely
relativistically. The expansion in v/c up to the second order is used only for
the heavy (b and c) quarks. The diquark-gluon interaction is taken modified by
the form factor describing the light diquark structure in terms of the diquark
wave functions. An overall reasonable agreement of the obtained predictions
with available experimental data and previous theoretical results is found.


title: Gravitational baryogenesis in Gauss-Bonnet braneworld cosmology

abstract:
  The mechanism of gravitational baryogenesis, based on the CPT-violating
gravitational interaction between the derivative of the Ricci scalar curvature
and the baryon-number current, is investigated in the context of the
Gauss-Bonnet braneworld cosmology. We study the constraints on the fundamental
five-dimensional gravity scale, the effective scale of B-violation and the
decoupling temperature, for the above mechanism to generate an acceptable
baryon asymmetry during the radiation-dominated era. The scenario of
gravitational leptogenesis, where the lepton-number violating interactions are
associated with the neutrino mass seesaw operator, is also considered.


title: Ideal Fermion Delocalization in Higgsless Models

abstract:
  In this note we examine the properties of deconstructed Higgsless models for
the case of a fermion whose SU(2) properties arise from delocalization over
many sites of the deconstructed lattice. We derive expressions for the
correlation functions and use these to establish a generalized consistency
relation among correlation functions. We discuss the form of the W boson
wavefunction and show that if the probability distribution of the delocalized
fermions is appropriately related to the W wavefunction, then deviations in
precision electroweak parameters are minimized. In particular, we show that
this "ideal fermion delocalization" results in the vanishing of three of the
four leading zero-momentum electroweak parameters defined by Barbieri, et. al.
We then discuss ideal fermion delocalization in the context of two continuum
Higgsless models, one in Anti-deSitter space and one in flat space. Our results
may be applied to any Higgsless linear moose model with multiple SU(2) groups,
including those with only a few extra vector bosons.


title:
Renormalization group approach to Sudakov resummation in prompt photon
  production

abstract:
  We prove the all-order exponentiation of soft logarithmic corrections to
prompt photon production in hadronic collisions, by generalizing an approach
previously developed in the context of Drell-Yan production and deep-inelastic
scattering. We show that all large logs in the soft limit can be expressed in
terms of two dimensionful variables, and we use the renormalization group to
resum them. The resummed results that we obtain are more general though less
predictive than those proposed by other groups, in that they can accommodate
for violations of Sudakov factorization.


title:
Long-distance effects and final state interactions in B to pion pion K
  and B to K anti-K K decays

abstract:
  B decays into pion pion K and K anti-K K, where the pion-pion and anti-K K
pairs interact in isospin zero S-wave, are studied in the pion-pion effective
mass range from threshold to 1.2 GeV. The interplay of strong and weak decay
amplitudes is analyzed using an unitary pion-pion and K anti-K coupled channel
model. Final state interactions are described in terms of four scalar form
factors constrained by unitarity and chiral perturbation theory. Branching
ratios for the B decay into f0(980)K, calculated in the factorization
approximation with some QCD corrections, are too low as compared to recent
data. In order to improve agreement with experiment, we introduce long-distance
contributions called charming penguins. Effective mass distributions, branching
ratios and asymmetries are compared with the existing data from BaBar and Belle
collaborations. A particularly large negative asymmetry in charged B decays is
predicted for one set of the charming penguin amplitudes.


title: Geometric scaling in high-energy QCD at nonzero momentum transfer

abstract:
  We show how one can obtain geometric scaling properties from the
Balitsky-Kovchegov (BK) equation. We start by explaining how, this property
arises for the b-independent BK equation. We show that it is possible to extend
this model to the full BK equation including momentum transfer. The saturation
scale behaves like max(q,Q_T) where q is the momentum transfer and Q_T a
typical scale of the target.


title: Collider Signatures of Higher Curvature Gravity

abstract:
  We explore the phenomenological implications at colliders for the existence
of higher-curvature gravity as extensions to both the Randall-Sundrum(RS) and
Arkani-Hamed, Dimopoulos and Dvali(ADD) scenarios. Such terms are expected to
arise on rather general grounds from ultraviolet completions of General
Relativity, e.g., from string theory. In the Randall-Sundrum model these terms
shift the mass spectrum and couplings of the graviton tower. In the case of ADD
they can lead to a threshold for the production of long-lived black holes.


title:
Unintegrated gluon distributions and Higgs boson production in
  proton-proton collisions

abstract:
  Inclusive cross sections for Higgs boson production in proton-proton
collisions are calculated in the formalism of unintegrated gluon distributions
(UGDF). Different UGDF from the literature are used. Although they were
constructed in order to describe the HERA deep-inelastic scattering $F_2$ data,
they lead to surprisingly different results for Higgs production. We present
both two-dimensional invariant cross section as a function of Higgs rapidity
and transverse momentum, as well as corresponding projections on rapidity or
transverse momentum. We quantify the differences between different UGD's by
applying different cuts on interrelations between transverse momentum of Higgs
and transverse momenta of both fusing gluons. We focus on large rapidity
region. The interplay of the gluon-gluon fusion and weak-boson fusion in
rapidity and transverse momentum is discussed. We find that above $p_T \sim$
50-100 GeV the weak-gauge-boson fusion dominates over gluon-gluon fusion.


title: Baryon number violation due to brane dynamics

abstract:
  We derive the low energy effective theory for two brane system with bulk
complex scalar fields. Then we find that higher order corrections to the
effective equation for scalar fields on the brane lead us to the baryon
number(B) violating process if the complex scalar field is regarded as a
particle carrying the baryon number current. We see that the motion of the
brane leads us the baryon number violation via the current-curvature coupling
even if the potential for scalar fields do not exist. We also estimate the net
baryon number assuming a C/CP violating interaction.


title: 1/Nc Countings in Baryons: Mixings and Decays

abstract:
  Based on a valence-quark picture of large Nc baryons, I describe in some
detail the 1/Nc power counting for decays and spin-flavor configuration mixings
in baryons.


title:
Analysis of the Neutralino System in Three--Body Leptonic Decays of
  Neutralinos

abstract:
  Neutralinos $\tilde{\chi}^0$ in supersymmetric theories, the spin--1/2
Majorana--type superpartners of the U(1) and SU(2) neutral electroweak gauge
bosons and SU(2) neutral Higgs bosons, are expected to be among light
supersymmetric particles so that they can be produced copiouslyvia direct pair
production and/or from cascade decays of other sparticles such as sleptons at
the planned Large Hadron Collider and the prospective International Linear
Collider. Considering the prospects of having both highly polarized neutralinos
and possibility of reconstructing their decay rest frames, we provide a
systematic investigation of the three--body leptonic decays of the neutralinos
in the minimal supersymmetric standard model and demonstrate alternative ways
for probing the Majorana nature of the neutralinos and CP violation in the
neutralino system.


title:
$W^- \to \tau \bar \nu_\tau$ 3-sigma anomaly in new physics beyond the
  standard model

abstract:
  Among so-called three 3-sigma anomalies in high energy physics, the excess of
the branching ratio $W^- \to \tau \bar \nu_\tau$ with respect to the electrons
and muons is especially interesting because (1) in the standard model (SM),
$W^-\ell\bar \nu_\ell$ is the pure left-handed charge-current which has been
tested precisely already, at least for the first two generation fermions, and
(2) the $W^\pm$ two-body leptonic decay is the cleanest one among three
anomalies due to its simpler kinematics and less hadronic uncertainties. In
this paper, we explore the possibilities to account for the anomaly in type II
two-Higgs-doublet model (2HDM) and minimal supersymmetric model (MSSM), as well
as effective lagrangian approach by introducing anomalous left- and
right-handed $W^-\tau \bar\nu_\tau$ couplings. Our results show that 2HDM and
MSSM can hardly accommodate $W^- \to \tau \nu_\tau$ anomaly, and the anomaly is
only marginally consistent to the measurements of $\tau \to \nu_\tau \ell \bar
\nu_\ell$ at 95% confidence level with the presence of anomalous couplings. In
the allowed regions, the right-handed coupling of $W^-\tau \nu_\tau$ shifts
from 0 in SM to $\sim 0.12$ while the left-handed one from 1 to $\sim 1.005$.


title: Reviewing model calculations of the Collins fragmentation function

abstract:
  The Collins fragmentation function describes a left/right asymmetry in the
fragmentation of a transversely polarized quark into a hadron in a jet. Four
different model calculations of the Collins function have been presented in the
literature. While based on the same concepts, they lead to different results
and in particular to different signs for the Collins function. The purpose of
the present work is to review the features of these models and correct some
errors made in previous calculations. A full study of the parameter dependence
and the possible modifications to these models is beyond the scope of the
paper. However, some general conclusions are drawn.


title: Relativistic Calculation of Pentaquark Widths

abstract:
  We calculate the widths of the various pentaquarks in a relativistic model in
which the pentaquark is considered to be composed of a scalar diquark and a
spin 1/2 triquark. We consider both positive and negative parity for the
pentaquark. There is a single parameter in our model which we vary and which
describes the size of the pentaquark. We obtain quite small widths for the
decay Theta^(+) -> N+K^(+) and for Theta_c^0 -> P+D^{*-} consistent with the
experimental situation. For the sum of the decay widths for Xi(bar)^(--) ->
Xi^(-) + pi^(+) and Xi(bar)^(--) -> Sigma^(-) + K^(-) we find values of the
order of 4-8 MeV for pentaquarks of the characteristic size considered in this
work. (The experimental situation with respect to te observation of the
Xi(bar)^(--) is somewhat uncertain at this time.) We also provide results for
the decays N^(+) -> N + pi and N_s^(+) -> Lambda^(0) + K^(+). Our model of
confinement plays an important role in our analysis and makes it possible to
use Feynman diagrams to describe the decay of the pentaquark.


title: Muonium-antimuonium conversion in models with heavy neutrinos

abstract:
  We study muonium-antimuonium conversion and mu+ e- to mu- e+ scattering
within two different lepton-flavor-violating models with heavy neutrinos: model
I is a typical seesaw that violates lepton number as well as flavor; model II
has a neutrino mass texture where lepton number is conserved. We look for the
largest possible amplitudes of these processes that are consistent with current
bounds. We find that model I has very limited chance of providing an observable
signal, except if a finely tuned condition in parameter space occurs. Model II,
on the other hand, requires no fine tuning and could cause larger effects.
However, the maximum amplitude provided by this model is still two orders of
magnitude below the sensitivity of current experiments: one predicts an
effective coupling G_MM up to 10^{-4}G_F for heavy neutrino masses near 10 TeV.
We have also clarified some discrepancies in previous literature on this
subject.


title: Influence of quark boundary conditions on the pion mass in finite volume

abstract:
  We calculate the mass shift for the pion in a finite volume with
renormalization group (RG) methods in the framework of the quark-mesons model.
In particular, we investigate the importance of the quark effects on the pion
mass. As in lattice gauge theory, the choice of quark boundary conditions has a
noticeable effect on the pion mass shift in small volumes, in addition to the
shift due to pion interactions. We compare our results to chiral perturbation
theory calculations and find differences due to the fact that chiral
perturbation theory only considers pion effects in the finite volume.


title:
Resolved photon and multi-component model for $\gamma^*$p and $\gamma^*
  \gamma^*$ scattering at high energies

abstract:
  We generalize our previous model for $\gamma^* p$ scattering to $\gamma
\gamma$ scattering. In the latter case the number of components naturally
grows. When using the model parameters from our previous $\gamma^* p$ analysis
the model cross section for $\gamma \gamma$ scattering is larger than the
corresponding LEP2 experimental data by more than a factor of two. However,
performing a new simultaneous fit to $\gamma^* p$ and $\gamma \gamma$ total
cross section we can find an optimal set of parameters to describe both
processes. We propose new measures of factorization breaking for $\gamma^*
\gamma^*$ collisions and present results for our new model.


title: Fluctuations effects in high-energy evolution of QCD

abstract:
  Recently, Iancu and Triantafyllopoulos have proposed a hierarchy of evolution
equations in QCD at high energy which generalises previous approaches by
including the effects of gluon number fluctuations and thus the pomeron loops.
In this paper, we present the first numerical simulations of the Langevin
equation which reproduces that hierarchy. This equation is formally the
Balitsky-Kovchegov equation supplemented with a noise term accounting for the
relevant fluctuations. In agreement with theoretical predictions, we find that
the effects of the fluctuations is to reduce the saturation exponent and to
induce geometric scaling violations at high energy.


title: Parameterization of the quark-quark correlator of a spin-1/2 hadron

abstract:
  The general parameterization of the quark-quark correlation function for a
spin-1/2 hadron is considered. The presence of the Wilson line ensuring color
gauge invariance of the correlator induces structures that were not given
explicitly in the existing literature. In particular, the general form of the
transverse momentum dependent correlator entering various hard scattering
processes is derived. In this case two new time-reversal odd parton
distributions appear at the twist-3 level.


title:
Diffractive W + 2 jet production: a background to exclusive H \to WW
  production at hadron colliders

abstract:
  Central exclusive double diffractive Higgs boson production, p p \to p + H +
p, is now recognised as an important search scenario for the LHC. We consider
the case when the Higgs boson decays to two W bosons, one of which may be
off-mass-shell, that subsequently decay to the q qbar l nu final state. An
important background to this is from the QCD process g g \to W q qbar, where
the two gluons are required to be in a J_z=0, colour-singlet state. We perform
an explicit calculation and investigate the salient properties of this
potentially important background process.


title: Diffractive parton distributions from perturbative QCD

abstract:
  The asymptotic collinear factorisation theorem, which holds for diffractive
deep-inelastic scattering, has important modifications in the sub-asymptotic
HERA regime. We use perturbative QCD to quantify these modifications. The
diffractive parton distributions are shown to satisfy an inhomogeneous
evolution equation. We emphasise that it is necessary to include both the
gluonic and sea-quark t-channel components of the perturbative Pomeron. The
corresponding Pomeron-to-parton splitting functions are derived in the
Appendix.


title: Open and hidden charm production in pA collisions

abstract:
  We discuss production of charmed mesons and J/Psi in p(d)A collisions at high
energies. We argue that when the saturation scale Qs characterizing the parton
density in a nucleus exceeds the quark mass m, the naive perturbation theory
breaks down. Consequently, we calculate a process of heavy quark production in
both open and hidden channels in the framework of the parton saturation model
(Color Glass Condensate). We demonstrate that at RHIC such description is in
agreement with experimental data on charm production.


title: How Magnetic is the Dirac Neutrino?

abstract:
  We derive model-independent, "naturalness" upper bounds on the magnetic
moments \mu_\nu of Dirac neutrinos generated by physics above the scale of
electroweak symmetry breaking. In the absence of fine-tuning of effective
operator coefficients, we find that current information on neutrino mass
implies that |\mu_\nu | < 10^(-14) Bohr magnetons. This bound is several orders
of magnitude stronger than those obtained from analyses of solar and reactor
neutrino data and astrophysical observations.


title: Double Field Inflation

abstract:
  We present an inflationary universe model which utilizes two coupled real
scalar fields. The inflation field $\phi$ experiences a first order phase
transition and its potential dominates the energy density of the Universe
during the inflationary epoch. This field $\phi$ is initially trapped in its
metastable minimum and must tunnel through a potential barrier to reach the
true vacuum. The second auxiliary field $\psi$ couples to the inflaton field
and serves as a catalyst to provide an abrupt end to the inflationary epoch;
i.e., the $\psi$ field produces a time-dependent nucleation rate for bubbles of
true $\phi$ vacuum. In this model, we find that bubbles of true vacuum can
indeed percolate and we argue that thermalization of the interiors can more
easily take place. The required degree of flatness (i.e., the fine tuning) in
the potential of the $\psi$ field is comparable to that of other models which
invoke slowly rolling fields. Pseudo Nambu-Goldstone bosons may naturally
provide the flat potential for the rolling field.


title: Neutrinos in the Simplest Little Higgs Model

abstract:
  The simplest little Higgs model based on a SU(3) global symmetry contains a
$SU(3)_{weak}$ triplet and a singlet per a generation in the lepton sector. A
neutral component of the triplet and the singlet turn into a neutral
vector-like $SU(2)_L$ singlet after electroweak symmetry breaking while the
other neutral component of the triplet is the SM neutrino. At tree level,
Yukawa couplings of the lepton sector not only allow the neutral vector-like
lepton to couple to the SM neutrino, but also give them a Dirac mass. Majorana
mass terms for the SM neutrinos and their partners arise at one loops, leading
to neutrino flavor mixing in addition to neutrino-heavy neutral lepton mixing.


title:
Two-loop electroweak corrections to the Higgs-boson decay H -> gamma
  gamma

abstract:
  The complete set of two-loop electroweak corrections to the decay width of
the Higgs boson into two photons is presented. Two-loop contributions involving
weak bosons and the top quark are computed in terms of an expansion in the
Higgs external momentum. Adding these results to the previously known light
fermion contributions, we find that the total electroweak corrections for a
Higgs boson with 100 GeV <m_H < 150 GeV are moderate and negative, between -4%
< delta_EW < 0%. Combination with the QCD corrections, which are small and
positive, gives a total correction to the one-loop results of |
delta_{EW+QCD}|< 1.5 %.


title: Can a measurement of theta-13 tell us about quark-lepton unification ?

abstract:
  We argue that a high precision measurement of the neutrino mixing parameter
$\theta_{13}$, within a three neutrino seesaw framework can throw important
light on the question of whether the quarks and leptons unify into a single
matter at high scales. Based on a number of examples, we conclude that a value
of $\theta_{13} \leq {\frac{\Delta m^2_{\odot}}{\Delta m^2_A}}\simeq 0.04$
would require at the minimum a pure leptonic interchange symmetry between $\mu$
and $\tau$ generations for its natural theoretical understanding and will
disfavor a quark-lepton unification type theory such as those based on
$SU(4)_c$ or SO(10) whereas a bigger value would leave open the possibility of
quark lepton unification.


title: Production of spin-3 mesons in diffractive DIS

abstract:
  We calculate the amplitudes of J^{PC}=3^{--} meson production in diffractive
DIS within the k_t-factorization approach, with a particular attention paid to
the rho_3(1690) meson. We find that at all Q^2 the rho_3(1690) production cross
section is 2-5 times smaller than the rho(1700) production cross section, which
is assumed to be a pure D-wave state. Studying sigma_L and sigma_T separately,
we observe domination of rho_3 in sigma_L and domination of rho(1700) in
sigma_T and offer an explanation of this behavior in simple terms. We also find
very strong contributions -- sometimes even domination -- of the s-channel
helicity violating amplitudes. The typical color dipole sizes probed in rho_3
production are shown to be larger than those in the ground state rho
production, and the energy dependence of rho_3 cross section turns out to be
much flatter than the rho production cross section. All the conclusions about
the relative behavior of rho_3(1690) and rho(1700) mesons are numerically
stable against variations of input parameters.


title: A New Approach to Inclusive Decay Spectra

abstract:
  The main obstacle in describing inclusive decay spectra in QCD - which, in
particular, limits the precision in extrapolating the measured \bar{B} \to X(s)
gamma rate to the full phase space as well as in extracting |V_{ub}| from
inclusive measurements of charmless semileptonic decays - is their sensitivity
to the non-perturbative momentum distribution of the heavy quark in the meson.
We show that, despite this sensitivity, resummed perturbation theory has high
predictive power. Conventional Sudakov-resummed perturbation theory describing
the decay of an on-shell heavy quark yields a divergent expansion. Detailed
understanding of this divergence in terms of infrared renormalons has paved the
way for making quantitative predictions. In particular, the leading renormalon
ambiguity cancels out between the Sudakov factor and the quark pole mass. This
cancellation requires renormalon resummation but involves no non-perturbative
information. Additional effects due to the Fermi motion of the quark in the
meson can be systematically taken into account through power corrections, which
are only important near the physical endpoint. This way the moments of the
\bar{B}\to X(s) gamma spectrum with experimentally-accessible cuts - which had
been so far just parametrized - were recently computed by perturbative means.
At Moriond these predictions were confronted with new data from BaBar.


title: Lorentz invariance for mixed neutrinos

abstract:
  We show that a proper field theoretical treatment of mixed (Dirac) neutrinos
leads to non-trivial dispersion relations for the flavor states. We analyze
such a situation in the framework of the non-linear relativity schemes recently
proposed by Magueijo and Smolin. We finally examine the experimental
implications of our theoretical proposals by considering the spectrum and the
end-point of beta decay in tritium.


title: New-Physics Signals in B -> pi pi Decays

abstract:
  This paper has been withdrawn by the authors, due to a mistake which
invalidates the analysis. One can never detect the presence of I=0 new physics
in B -> pi pi.


title: CPT Violation: Theory and Phenomenology

abstract:
  Invariance under the combined transformations of CPT (in any order) is
guaranteed in Quantum Field Theory in flat space times due to a basic theorem
(CPT Theorem). The currently used formalism of particle physics phenomenology
is based on this theorem. However, there may be violations of the basic
underlying assumptions of this theorem in models of quantum gravity, namely
Lorentz covariance, unitarity and/or locality of interactions. This may lead to
observable (in principle) effects of CPT violation. Since there is no single
figure of merit for this potential violation,the respective phenomenology is
rather complex. In this review I classify the possible ways of CPT violation,
and I describe briefly their phenomenology, in both terrestrial and
astrophysical experiments, including antimatter factories, neutral mesons and
neutrinos, and discuss the various sensitivities.


title:
Photon and dilepton production in the Quark-Gluon plasma: perturbation
  theory vs lattice QCD

abstract:
  This talk reviews the status of QCD calculations of photon and dilepton
production rates in a Quark-Gluon plasma. Theses rates are known to order
${\cal O}(\alpha_s)$. Their calculations involve various resummations to
account for well identified physical effects that are briefly described.
Lattice calculations of the spectral functions give also access to the dilepton
rates. Comparison with perturbative results points to inconsistencies in both
approaches when the dilepton energy becomes small.


title: Scalar interactions and the polarizations of $B\to \phi K^*$

abstract:
  We try to understand the polarization puzzle in $B\to \phi K^*$ decays with a
simple Higgs model associated with flavor changing neutral current at tree
level. The new interactions can effectively reduce the longitudinal
polarization $|A_0|^2$. In particular, we find that if the couplings of
$b$-quark in different chiralities to Higgs are the same, the transverse
polarization $|A_\perp|^2$ can receive the largest contribution and its value
can be as large as 30%. On the other hand, with opposite sign in the couplings,
the other transverse polarization $|A_{\parallel}|^2$ is enhanced.


title: Solution to the Balitsky-Kovchegov equation in the saturation domain

abstract:
  The solution to the Balitsky-Kovchegov equation is found in the deep
saturation domain. The controversy between different approaches regarding the
asymptotic behaviour of the scattering amplitude is solved. It is shown that
the dipole amplitude behaves as $ 1 - \exp (- z + \ln z)$ with $ z = \ln (r^2
Q^2_s)$ ($ r$ -size of the dipole, $Q_s$ is the saturation scale) in the deep
saturation region. This solution is developed from the scaling solution to the
homogeneous Balitsky-Kovchegov equation. The dangers associated with making
simplifications in the BFKL kernel, to investigate the asymptotic behaviour of
the scattering amplitude, is pointed out . In particular, the fact that the
Balitsky-Kovchegov equation belongs to the
Fisher-Kolmogorov-Petrovsky-Piscounov -type of equation, needs further careful
investigation.


title:
Comments related to reading "Static quantities of the $W$ boson in the
  $SU_L(3)\times U_X(1)$ model with right-handed neutrinos"

abstract:
  Comments related to reading the paper "Static quantities of the $W$ boson in
the $SU_L(3)\times U_X(1)$ model with right-handed neutrinos", hep-ph/0312308
(by J. L. Garcia-Luna et al) are given. They do not concern the main results of
the paper but a statement there about the Higgs sector of the 331 model with
right-handed neutrinos. The scalar sextet introduced here may help us to
generate neutrino masses in an acceptable range.


title: Neutral Color Superconductivity and Pseudo-Goldstone Modes

abstract:
  Four of the five expected Goldstone modes, which will be eaten up by gauge
fields, in neutral two-flavor color superconductor are actually
pseudo-Goldstone modes, and their degenerated mass is exactly the magnitude of
the color chemical potential, which is introduced to guarantee the color
neutrality at moderate baryon density.


title:
Exploring New Features of Neutrino Oscillations with a Triton Source and
  a Large Spherical TPC

abstract:
  The purpose of the present paper is to study the neutrino oscillations as
they may appear in the low energy neutrinos emitted in triton decay, with
maximum neutrino energy of 18.6 KeV. Such low energy neutrino oscillations can
only be detected via neutrino electron scattering. The novel feature is the
fact that the cross section is sensitive to both charged and neutral currents.
Thus one can simultaneously probe the electron neutrino disappearance as well
as the appearance of the other two flavors. By folding the differential cross
section with the neutrino spectrum one can study the dependence of the
oscillation parameters as a function of the electron energy. The technical
challenges to this end can be summarized as building a very large TPC capable
of detecting low energy recoils, down to a few 100 eV, within the required low
background constraints have been previously described \cite{NOSTOS1}. We only
mention here that the oscillation involving the small angle theta_13, directly
measured in this experiment, is fully contained inside the detector. A
sensitivity of a few percent for the measurement of the above angle will be
achieved.


title: Strong decays of P wave baryons in the $1/N_c$ expansion

abstract:
  The hadronic decays of non-strange negative parity baryons are analyzed in
the framework of the 1/Nc expansion. A complete basis of spin-flavor operators
for the pseudoscalar meson S and D partial wave amplitudes is established to
order 1/Nc and the unknown effective coefficients are determined by fitting to
the empirically known widths. A set of relations between widths that result at
the leading order, i.e. order Nc^0, is given and tested with the available
data.


title: Decay width of the pentaquark state $\Theta^+(1540)$ with QCD sum rules

abstract:
  In this article, we take the point of view that the pentaquark state
$\Theta^+(1540)$ has negative parity, and choose the diquark-triquark type
interpolating current to calculate the strong coupling constant $g_{\Theta NK}$
in the QCD sum rule approach. Our numerical results indicate the values of the
strong coupling constant $g_{\Theta NK}$ are very small, $|g_{\Theta
NK}|=0.175\pm0.084$, and the width $\Gamma_\Theta <4MeV$, which can explain the
narrow width $\Gamma \leq 10 MeV$ naturally.


title: Axions: Recent searches and new limits

abstract:
  The CERN Axion Solar Telescope (CAST) experiment searches for solar axions by
the "helioscope" method. First results imply an upper limit on the axion-photon
coupling of g_a-gamma < 1.16 x 10^-10 GeV^-1 (95% CL) for m_a < 0.02 eV, in
this mass range superseding the previous energy-loss limit from globular
cluster stars. By virtue of a variable-pressure helium filling of the magnetic
transition region, CAST II will extend the sensitivity to axion masses up to
about 1 eV, for the first time testing realistic axion parameters in a
laboratory experiment. In this mass range axions would contribute a cosmic hot
dark matter component. New structure-formation limits imply that m_a < 1-2 eV.
For the particular case of hadronic axions with a standard axion-pion coupling,
the present-day cosmic axion density would be about 50 cm^-3 and the cosmic
mass limit is m_a < 1.05 eV (95% CL). We also comment on the axion
interpretation of the anomalous signature observed in the PVLAS experiment.


title: S3 x Z2 model for neutrino mass matrices

abstract:
  We propose a model for lepton mass matrices based on the seesaw mechanism, a
complex scalar gauge singlet and a horizontal symmetry $S_3 \times
\mathbbm{Z}_2$. In a suitable weak basis, the charged-lepton mass matrix and
the neutrino Dirac mass matrix are diagonal, but the vacuum expectation value
of the scalar gauge singlet renders the Majorana mass matrix of the
right-handed neutrinos non-diagonal, thereby generating lepton mixing. When the
symmetry $S_3$ is not broken in the scalar potential, the effective
light-neutrino Majorana mass matrix enjoys $\mu$--$\tau$ interchange symmetry,
thus predicting maximal atmospheric neutrino mixing together with $U_{e3} = 0$.
A partial and less predictive form of $\mu$--$\tau$ interchange symmetry is
obtained when the symmetry $S_3$ is softly broken in the scalar potential.
Enlarging the symmetry group $S_3 \times \mathbbm{Z}_2$ by an additional
discrete electron-number symmetry $\mathbbm{Z}_2^{(e)}$, a more predicitive
model is obtained, which is in practice indistinguishable from a previous one
based on the group $D_4$.


title: Disoriented Chiral Condensate: Theory and Experiment

abstract:
  It is thought that a region of pseudo-vacuum, where the chiral order
parameter is misaligned from its vacuum orientation in isospin space, might
occasionally form in high energy hadronic or nuclear collisions. The possible
detection of such disoriented chiral condensate (DCC) would provide useful
information about the chiral structure of the QCD vacuum and/or the chiral
phase transition of strong interactions at high temperature. We review the
theoretical developments concerning the possible DCC formation in high-energy
collisions as well as the various experimental searches that have been
performed so far. We discuss future prospects for upcoming DCC searches, e.g.
in high-energy heavy-ion collision experiments at RHIC and LHC.


title: Sea quark and gluon polarization in the nucleon at NLO accuracy

abstract:
  We investigate the sea quark polarization in the nucleon by means of a
combined next to leading order analysis to the recently enlarged set of
inclusive and semi-inclusive polarized deep inelastic scattering data. Using
the Lagrange multiplier method, we asses the uncertainty inherent to the
extraction of the different spin dependent parton densities in a QCD global
fit, and the impact of the increased set of semi-inclusive data now available.
We comment on future prospects at RHIC and JLAB and their potential impact in
the future determination of polarized parton densities.


title: Strongly and Weakly Unstable Anisotropic Quark-Gluon Plasma

abstract:
  Using explicit solutions of the QCD transport equations, we construct an
effective potential for an anisotropic quark-gluon plasma which under plausible
assumptions holds beyond the Hard Loop approximation. The configurations, which
are unstable in the linear response approach, are characterized by a negative
quadratic term of the effective potential. The signs of higher order terms can
be either negative or positive, depending on the parton momentum distribution.
In the case of a Gaussian momentum distribution, the potential is negative and
unbound from below. Therefore, the modes, which are unstable for gauge fields
of small amplitude, remain unstable for arbitrary large amplitudes. We also
present an example of a momentum distribution which gives a negative quadratic
term of the effective potential but the whole potential has a minimum and it
grows for sufficiently large gauge fields. Then, the system is weakly unstable.
The character of the instability is important for the dynamical evolution of
the plasma system.


title:
Are direct search experiments sensitive to all spin-independent WIMP
  candidates?

abstract:
  The common analysis of direct searches for spin-independent Weakly
Interacting Massive Particles (WIMPs) assumes that a spin-independent WIMP
couples with the same strength with both nucleons, \textit{i.e.} that the
spin-independent interaction is also fully isospin-independent. Though in a
fully isospin-dependent interaction scenario the spin-independent WIMP-nucleus
cross section is strongly quenched, the leading experiments are still sensitive
enough to set limits 1-2 orders of magnitude less stringent than those
traditionally presented. In the isospin-dependent scenario the difference
between the limits of CDMS-II and ZEPLIN-I is significantly reduced. Here, a
model-independent framework is discussed and applied to obtain the current
general model-independent limits.


title: Generation of Small Neutrino Majorana Masses in a Randall-Sundrum Model

abstract:
  We propose a model, in the framework of 5D with warped geometry, in which
small neutrino Majorana masses are generated by tree level coupling of lepton
doublets to a SU(2)_{L}-triplet scalar field, which is coupled to a bulk
SM-singlet. The neutrino mass scale is determined by the bulk mass term
(alpha_{S}) of the singlet as ve^{-2(alpha_{S}-1)*pi*kR}. This suppression is
due to a small overlap between the profile of the singlet zero mode and the
triplet, which is confined to the TeV brane. The generic form for the neutrino
mass matrix due to the overlap between the fermions is not compatible with the
LMA solution. This is overcome by imposing a Z_{4} symmetry, which is softly
broken by couplings of the triplet Higgs to the lepton doublets. This model
successfully reproduces the observed masses and mixing angles in charged lepton
sector as well as in the neutrino sector, in addition to having a prediction of
|U_{e3}| ~ O(0.01). The mass of the triplet is of the order of a TeV, and could
be produced at upcoming collider experiments. The doubly charged member of the
triplet can decay into two same sign charged leptons yielding the whole triplet
coupling matrix which, in turn, gives the mixing matrix in the neutrino sector.


title: Baryon wave function: Large-Nc QCD and lessons from models

abstract:
  The structure of the 1/Nc expansion for the baryon distribution amplitude in
QCD is tested using quark models. Earlier conjectures about this structure
based on the evolution equation and on the soft-pion theorem are confirmed by
the model analysis. The problem of the calculation of the baryon wave function
at large Nc is reduced to the analysis of equations of motion for an effective
classical dynamical system.


title: Natural soft leptogenesis

abstract:
  Successful soft leptogenesis requires small B-terms for the right-handed
sneutrinos and a large CP violating phase between the A- and B-terms. We show
that this situation is realized naturally within the framework of gauge
mediated supersymmetry breaking. The A-term is dominated by contribution from
gauge mediation, while supergravity effects are more important for the B-term.
The different origins naturally explain simultaneously the smallness of the
B-term and the large CP violating phase. The most stringent bounds on the model
come from the cosmological gravitino problem. We find a viable parameter region
with very light gravitino $m_{3/2} \lesssim 16 eV$, providing a consistent
framework for supersymmetry phenomenology, soft leptogenesis and cosmology.


title: Relations between quark and lepton mixing angles and matrices

abstract:
  We discuss the relations between the mixing angles and the mixing matrices of
quarks and leptons. With Raidal's numerical relations, we parametrize the
lepton mixing (PMNS) matrix with the parameters of the quark mixing (CKM)
matrix, and calculate the products of $V_{\mathrm{CKM}}U_{\mathrm{PMNS}}$ and
$U_{\mathrm{PMNS}}V_{\mathrm{CKM}}$. Also, under the conjectures
$V_{\mathrm{CKM}}U_{\mathrm{PMNS}}=U_{\mathrm{bimax}}$ or
$U_{\mathrm{PMNS}}V_{\mathrm{CKM}}=U_{\mathrm{bimax}}$, we get the PMNS matrix
naturally, and test Raidal's relations in these two different versions. The
similarities and the differences between the different versions are discussed
in detail.


title:
Issues on neutrino-nucleus reactions in the quasi-free delta production
  region

abstract:
  A brief overview is presented of various issues involved in phenomenological
and theoretical works on charge-current neutrino-nucleus reactions associated
with the quasi-free Delta(1232) production. An assessment of the present status
of the works is made with respect to the objective of this conference,
Sub-Dominant Oscillation Effects in Atmospheric Neutrino Experiments.


title: Structure Functions and Pair Correlations of the Quark-Gluon Plasma

abstract:
  Recent experiments at RHIC and theoretical considerations indicate that the
quark-gluon plasma, present in the fireball of relativistic heavy-ion
collisions, might be in a liquid phase. The liquid state can be identified by
characteristic correlation and structure functions. Here definitions of the
structure functions and pair correlations of the quark-gluon plasma are
presented as well as perturbative results. These definitions might be useful
for verifying the quark-gluon-plasma liquid in QCD lattice calculations.


title: Enhanced Diagrams in High Energy Hadronic and Nuclear Scattering

abstract:
  High energy hadronic and nuclear interactions are described within Gribov's
Reggeon scheme. An approach to re-summation of enhanced Pomeron graphs is
proposed. The latter is applied to develop a new Monte Carlo model which treats
non-linear interaction effects explicitely in individual hadronic collisions.
On the other hand, we discuss a possible generalization of the scheme, which
allows to account also for pQCD effects. In particular, this offers a
possibility to fix model parameters on the basis of data on hadron-hadron cross
sections, hadronic multi-particle production, and on total and diffractive
proton structure functions.


title: Tri-Bimaximal Neutrino Mixing from Discrete Symmetry in Extra Dimensions

abstract:
  We discuss a particularly symmetric model of neutrino mixings where, with
good accuracy, the atmospheric mixing angle theta_{23} is maximal, theta_{13}=0
and the solar angle satisfies sin^2(theta_{12})=1/3 (Harrison-Perkins-Scott
(HPS) matrix). The discrete symmetry A_4 is a suitable symmetry group for the
realization of this type of model. We construct a model where the HPS matrix is
exactly obtained in a first approximation without imposing ad hoc relations
among parameters. The crucial issue of the required VEV alignment in the scalar
sector is discussed and we present a natural solution of this problem based on
a formulation with extra dimensions. We study the corrections from higher
dimensionality operators allowed by the symmetries of the model and discuss the
conditions on the cut-off scales and the VEVs in order for these corrections to
be completely under control. Finally, the observed hierarchy of charged lepton
masses is obtained by assuming a larger flavour symmetry. We also show that,
under general conditions, a maximal theta_{23} can never arise from an exact
flavour symmetry.


title: Theoretical Prospects of Neutrinoless Double Beta Decay

abstract:
  The compelling experimental evidences for oscillations of solar and
atmospheric neutrinos imply the existence of 3-neutrino mixing in vacuum. We
briefly review the phenomenology of 3-neutrino mixing, and the current data on
the 3-neutrino mixing parameters. The open questions and the main goals of
future research in the field of neutrino mixing and oscillations are outlined.
The predictions for the effective Majorana mass |<m>| in neutrinoless double
beta (bb0nu-) decay in the case of 3-neutrino mixing and massive Majorana
neutrinos are reviewed. The physics potential of the experiments, searching for
bb0nu-decay and having sensitivity approximately 10 times better than the
presently reached, for providing information on the type of the neutrino mass
spectrum, on the absolute scale of neutrino masses and on the Majorana
CP-violation phases in the PMNS neutrino mixing matrix, is discussed.


title:
Mapping the boundary of the first order finite temperature restoration
  of chiral symmetry in the m_pi-m_K--plane with a linear sigma model

abstract:
  The phase diagram of the three-flavor QCD is mapped out in the low mass
corner of the m_pi-m_K--plane with help of the SU_L(3) x SU_R(3) linear sigma
model (LSM). A novel zero temperature parametrization is proposed for the mass
dependence of the couplings away from the physical point based on the the
three-flavor chiral perturbation theory (U(3) ChPT). One-loop thermodynamics is
constructed by applying optimized perturbation theory. The unknown dependence
of the scalar spectra on the pseudoscalar masses limitates the accuracy of the
predictions. Results are compared to lattice data and similar investigations
with other variants of effective chiral models. The critical value of the pion
mass is below 65 MeV for all m_K values <= 800 MeV. Along the diagonal
m_pi=m_K, we estimate m_crit(diag)=40+-20 MeV.


title: Supersymmetric Models and CP violation in B decays

abstract:
  In this talk CP violation in the supersymmetric models, and especially in
B-decays is discussed. We review our analysis of the supersymmetric
contributions to the mixing CP asymmetries of $B\to \phi K_S$ and $B\to
\eta^{\prime} K_S$ processes. Both gluino and chargino exchanges are considered
in a model independent way by using the mass insertion approximation method.
The QCD factorization method is used, and parametrization of this method in
terms of Wilson coefficients is presented in both decay modes. Correlations
between the CP asymmetries of these processes and the direct CP asymmetry in
$b\to s \gamma$ decay are shown.


title: Decay mechanism of quarks and leptons

abstract:
  The top-family quarks will decay in charm-family quarks while beauty-family
quarks serve the purpose of spectrators. Decay matrix is suggested for quark
and lepton decays.