title: Electroweak Baryogenesis in a Supersymmetric U(1)' Model

abstract:
  We construct an anomaly free supersymmetric U(1)' model with a secluded
U(1)'-breaking sector. We study the one-loop effective potential at finite
temperature, and show that there exists a strong enough first order electroweak
phase transition for electroweak baryogenesis (EWBG) because of the large
trilinear term $A_h h S H_d H_u$ in the tree-level Higgs potential. Unlike in
the MSSM, the lightest stop can be very heavy. We consider the non-local EWBG
mechanism in the thin wall regime, and find that within uncertainties the
observed baryon number can be generated from the $\tau$ lepton contribution,
with the secluded sector playing an essential role. The chargino and neutralino
contributions and the implications for the Z' mass and electric dipole moments
are briefly discussed.


title: The low energy effective theory and nucleon stability

abstract:
  We show that the Standard Model Lagrangian, including small neutrino masses,
has an anomaly-free discrete Z_6 symmetry. Anomaly cancellation requires the
number of family to be 3 mod 6. This symmetry can ensure the stability of the
nucleon even when the threshold of new physics \Lambda is low as 10^2 GeV. All
\Delta B=1 and \Delta B=2 (B is the baryon number) effective operators are
forbidden by the Z_6 symmetry. \Delta B=3 operators are allowed, but they arise
only at dimension 15. We suggest a simple mechanism for realizing reasonable
neutrino masses and mixings even with such a low scale for \Lambda.


title: Particle Dark Matter from Physics Beyond the Standard Model

abstract:
  In this talk I contrast three different particle dark matter candidates, all
motivated by new physics beyond the Standard Model: supersymmetric dark matter,
Kaluza-Klein dark matter, and scalar dark matter. I then discuss the prospects
for their discovery and identification in both direct detection as well as
collider experiments.


title: Higgs Potential in Minimal S_3 Invariant Extension of the Standard Model

abstract:
  Minimal $S_{3}$ invariant Higgs potential with real soft $S_{3}$ breaking
masses is investigated.
  It is required that without having a problem with triviality, all physical
Higgs bosons, except one neutral one, become heavy ~O(10) TeV in order to
sufficiently suppress flavor changing neutral currents. There exist three
nonequivalent soft mass terms that can be characterized according to their
discrete symmetries, and the one which breaks $S_{3}$ completely. The $S_{2}'$
invariant vacuum expectation values (VEVs) of the Higgs fields are the most
economic VEVs in the sense that the freedom of VEVs can be completely absorbed
into the Yukawa couplings so that it is possible to derive, without referring
to the details of the VEVs, the most general form for the fermion mass matrices
in minimal $S_{3}$ extension of the standard model. We find that except for the
completely broken case of the soft terms, the $S_{2}'$ invariant VEVs are
unique VEVs that satisfy the requirement of heavy Higgs bosons. It is found
that they also correspond to a local minimum in the completely broken case.


title: Glueball hunting in $e^+e^- \to J/\psi\to \phi f_0$

abstract:
  Building on recent work by Brodsky {\it et al.}, we advocate searching for
glueball degrees of freedom in $e^+e^- \to J/\psi\to \phi f_0$ at CLEO-c and
BES.


title: Correlations around an interface

abstract:
  We compute one-loop correlation functions for the fluctuations of an
interface using a field theory model. We obtain them from Feynman diagrams
drawn with a propagator which is the inverse of the Hamiltonian of a
Poschl-Teller problem. We derive an expression for the propagator in terms of
elementary functions, show that it corresponds to the usual spectral sum, and
use it to calculate quantities such as the surface tension and interface
profile in two and three spatial dimensions. The three-dimensional quantities
are rederived in a simple, unified manner, whereas those in two dimensions
extend the existing literature, and are applicable to thin films. In addition,
we compute the one-loop self-energy, which may be extracted from experiment, or
from Monte Carlo simulations. Our results may be applied in various scenarios,
which include fluctuations around topological defects in cosmology,
supersymmetric domain walls, Z(N) bubbles in QCD, domain walls in magnetic
systems, interfaces separating Bose-Einstein condensates, and interfaces in
binary liquid mixtures.


title: Precision Electroweak Constraints on the mixed Radion-Higgs sector

abstract:
  Adding radion perturbations (up to second order) to the static (RS) metric
allows us to calculate the general first and second order interactions of the
radion field with the electroweak vector bosons. We use these interactions to
compute precision electroweak observables in the case of Higgs-radion mixing
and compare with experiment.


title:
$\pi \Lambda$ phase shifts and CP Violation in ${\Xi\to \pi \Lambda}$
  Deca

abstract:
  The CP violation asymmetry parameters in $\Xi \to\pi\Lambda$ nonleptonic
decays are presently being measured by the HyperCP experiment. In the study of
these CP violation parameters, the strong $S$ and $P$ phase shifts for the
$\pi\Lambda$ final-state interactions are needed. In this work, these phases
are calculated using an effective chiral Lagrangian model, that considers
$\Sigma$, $\Sigma^*$(1385), and the $\sigma$-term, in the intermediate states.
The $\sigma$-term is calculated in terms of the scalar form factor of the
baryon.


title: Factorization and Shape-Function Effects in Inclusive B-Meson Decays

abstract:
  Using methods of effective field theory, factorized expressions for arbitrary
B -> X_u l nu decay distributions in the shape-function region of large
hadronic energy and moderate hadronic invariant mass are derived. Large
logarithms are resummed at next-to-leading order in renormalization-group
improved perturbation theory. The operator product expansion is employed to
relate moments of the renormalized shape function with HQET parameters such as
m_b, Lambda(bar) and lambda_1 defined in a new physical subtraction scheme. An
analytic expression for the asymptotic behavior of the shape function is
obtained, which reveals that it is not positive definite. Explicit expressions
are presented for the charged-lepton energy spectrum, the hadronic invariant
mass distribution, and the spectrum in the hadronic light-cone momentum P_+ =
E_H - P_H. A new method for a precision measurement of |V_{ub}| is proposed,
which combines good theoretical control with high efficiency and a powerful
discrimination against charm background.


title: Determination of |Vub|

abstract:
  The element Vub of the CKM mixing matrix is the smallest of the quark
couplings and is crucial in understanding CP violation in the B system. In this
review, we discuss the present status of the determination of its magnitude,
which involves a significant effort both experimentally and theoretically.
Decisive progress has been achieved in recent years, thanks in part to the
large data sets that have become available at the B factories. Based on these
data we propose an average |Vub| value of (3.67 \pm 0.47)x10^{-3}, which has an
uncertainty of 13%. With the experimental and theoretical progress expected in
the next few years a determination to an accuracy of 10%, or better, seems
feasible.


title: B-physics Signature of a Supersymmetric U(2) Flavor Model

abstract:
  We discuss the B-physics signature of a supersymmetric U(2) flavor model in
which the third generation scalars are relatively light (electroweak scale
masses). We impose current experimental constraints on such a framework and
obtain expectations for various B-physics processes. Here we present CP
violation in (b->s gamma) and (b->phi K), and, Bs-Bsbar mixing. We show that if
realized in nature, such a framework can be discovered in current and upcoming
experiments.


title: Time-Dependent CP Violation in $B^0 \to P^0P^0X^0$ Decays

abstract:
  We note that in decays of the type $B^0 \to P^0P^0X^0$, where $P^0$ and $X^0$
represent any CP eigenstate spin-0 neutral particles, the final state is a CP
eigenstate. We consider the possibilities for studying time-dependent CP
violation in decays of this type at $B$ factories with high luminosity, with
particular attention to $B^0 \to \ks \ks \ks$. We also comment on some cases
where $X^0$ has non-zero spin, and decays of the type $B^0 \to P^0 Q^0 X^0$,
where the three final state particles are different spin-0 CP eigenstates.


title:
Limits on the temporal variation of the fine structure constant, quark
  masses and strong interaction from quasar absorption spectra and atomic clock
  experiments

abstract:
  We perform calculations of the dependence of nuclear magnetic moments on
quark masses and obtain limits on the variation of $(m_q/\Lambda_{QCD})$ from
recent measurements of hydrogen hyperfine (21 cm) and molecular rotational
transitions in quasar absorption systems, atomic clock experiments with
hyperfine transitions in H, Rb, Cs, Yb$^+$, Hg$^+$ and optical transition in
Hg$^+$. Experiments with Cd$^+$, deuterium/hydrogen, molecular SF$_6$ and
Zeeman transitions in $^3$He/Xe are also discussed.


title:
One-loop contributions of charginos and neutralinos to W+ W- production
  in e+ e- collisions

abstract:
  We study one-loop effects of charginos and neutralinos on the helicity
amplitudes for the process $e^+e^-\to W^+W^-$ in the MSSM. The calculation is
tested by using two methods. First, the sum rules among form factors which
result from BRS invariance. Second, the decoupling property in the large mass
limit is used to test the overall normalization of the amplitudes. The one-loop
contribution to the helicity amplitudes is shown as a function of $\mu$ Higgs
parameter and $\sqrt{s}$. We also study the effects of the CP-violating phase.


title: Twist-3 Distribute Amplitude of the Pion in QCD Sum Rules

abstract:
  We apply the background field method to calculate the moments of the pion
two-particles twist-3 distribution amplitude (DA) $\phi_p(\xi)$ in QCD sum
rules. In this paper,we do not use the equation of motion for the quarks inside
the pion since they are not on shell and introduce a new parameter $m_0^p$ to
be determined. We get the parameter $m_0^p\approx1.30GeV$ in this approach. If
assuming the expansion of $\phi_p(\xi)$ in the series in Gegenbauer polynomials
$C_n^{1/2}(\xi)$, one can obtain its approximate expression which can be
determined by its first few moments.


title:
Isospin Squeezed States, Disoriented Chiral condensates and Pion
  Production: A Dynamic Group Theoretical Approach

abstract:
  We make a complete dynamical study of Isotopic spin conservation effects on
the multiplicity distributions of both hard and soft pions emitted in a quark
gluon plasma undergoing a non-equilibrium phase transition.


title:
Strong Neutrino-Nucleon Interactions at Ultrahigh Energies as a Solution
  to the GZK Puzzle

abstract:
  After a short review of the ultrahigh energy cosmic ray puzzle - the apparent
observation of cosmic rays originating from cosmological distances with
energies above the expected Greisen-Zatsepin-Kuzmin cutoff 4x10^{19} eV - we
consider strongly interacting neutrino scenarios as an especially interesting
solution. We show that all features of the ultrahigh energy cosmic ray spectrum
from 10^{17} eV to 10^{21} eV can be described to originate from a simple
power-like injection spectrum of protons, under the assumption that the
neutrino-nucleon cross-section is significantly enhanced at center of mass
energies above ~ 100 TeV. In such a scenario, the cosmogenic neutrinos produced
during the propagation of protons through the cosmic microwave background
initiate air showers in the atmosphere, just as the protons. The total air
shower spectrum induced by protons and neutrinos shows excellent agreement with
the observations. We shortly discuss TeV-scale extensions of the Standard Model
which may lead to a realization of a strongly interacting neutrino scenario. We
emphasize, however, that such a scenario may even be realized within the
standard electroweak model: electroweak instanton/sphaleron induced processes
may get strong at ultrahigh energies. Possible tests of strongly interacting
neutrino scenarios range from observations at cosmic ray facilities and
neutrino telescopes to searches at lepton nucleon scattering experiments.


title: Optical Theorem, cutting rules and unstable particle's decay width

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


title:
A calculation of the QCD phase diagram at finite temperature, and baryon
  and isospin chemical potentials

abstract:
  We study the phases of a two-flavor Nambu-Jona-Lasinio model at finite
temperature $T$, baryon and isospin chemical potentials:
$\mu_{B}=(\mu_{u}+\mu_{d})/2$, $\mu_{I}=(\mu_{u}-\mu_{d})/2$. This study
completes a previous analysis where only small isospin chemical potentials
$\mu_{I}$ were considered


title: Discovery of New Physics in Radiative Pion Decays?

abstract:
  Recently a strong indication for a deviation from the standard model (SM) has
been obtained by PIBETA Collaboration. Namely, SM fails to describe the energy
distribution and the branching ratio of the radiative decays of the positive
pions at rest in the high-E_gamma/low-E_e kinematic region.
  The previous experiment at ISTRA facility, testing the radiative decays of
negative pions in flight in a wide kinematic region has alarmed about the same
effect, although statistically less significant. The present PIBETA result
indicates a deficit of the branching ratio of the radiative pion decay in the
specified kinematic region at 8 sigma level in comparison with SM prediction,
while in the other kinematic regions both the branching ratios and the energy
distributions are compatible with the V-A interaction.
  We argue that this effect can result only from a small admixture of new
tensor interactions. They may arise due to an exchange of new spin one chiral
bosons which interact anomalously with matter.


title:
The role of Majorana CP phases in the bi-maximal mixing scheme
  -hierarchical Dirac mass case-

abstract:
  We discuss the energy scale profile of the bi-maximal mixing which is given
at the GUT energy scale in the minimal SUSY model, associated with an
assumption that Y_nu^dagger Y_nu is diagonal, where Y_nu is the neutrino-Yukawa
coupling matrix. In this model, the Dirac mass matrix which appears in the
seesaw neutrino mass matrix is determined by three neutrino masses, two
relative Majorana phases and three heavy Majorana masses. All CP phases are
related by two Majorana phases. We show that the requirement that the solar
mixing angle moves from the maximal mixing at GUT to the observed one as the
energy scale decreases by the renormalization effect. We discuss the
leptogenesis, and the lepton flavor violation process by assuming the universal
soft breaking terms.


title:
More Precise Determination of V_{cb} & V_{ub} and Direct CP Violation in
  Charmless B Decays

abstract:
  More precise extractions on the two important CKM matrix elements $|V_{cb}|$
and $|V_{ub}|$ are presented up to $1/m_Q^2$ corrections based on the complete
heavy quark effective field theory (HQEFT) of QCD. The HQEFT as a large
component QCD provides us a complete theoretical framework for correctly and
systematically evaluating the subleading and higher order contributions in
$1/m_Q$ expansion of heavy quarks. A global analysis on charmless B decays is
made based on the isospin and SU(3) flavor symmetry. An isospin relation is
found to be very useful for studying SU(3) symmetry breaking effects of strong
phases and exploring new type of electroweak penguin effects. The direct CP
violation in charmless B decays is predicted and its precise measurement is
helpful either for testing SU(3) symmetry breaking effects of strong phases or
for probing new physics beyond standard model.


title:
Calorimetric transverse energy-energy correlations as a probe of jet
  quenching

abstract:
  The sensitivity of calorimetric energy-energy correlation function to the
medium-induced energy loss of fast partons in high multiplicity heavy ion
interactions is demonstrated at the appropriate selection of events for the
analysis, namely, the availability of one high-pt jet in an event at least and
using the procedure of ``thermal'' background subtraction. Without jet trigger
this correlation function manifests the global structure of transverse energy
flux: the correlator is isotropic for central collisions, and for non-central
collisions it is sensitive to the azimuthal anisotropy of energy flow
reproducing its Fourier harmonics but with the coefficients squared.


title:
Estimating Mass of Sigma-Meson and Study on Application of the Linear
  Sigma-Model

abstract:
  Whether the $\sigma-meson$ ($f_0(600)$) exists as a real particle is a
long-standing problem in both particle physics and nuclear physics. In this
work, we analyze the deuteron binding energy in the linear $\sigma$ model and
by fitting the data, we are able to determine the range of $m_{\sigma}$ and
also investigate applicability of the linear $\sigma$ model for the interaction
between hadrons in the energy region of MeV's. Our result shows that the best
fit to the data of the deuteron binding energy and other experimental data
about deuteron advocates a narrow range for the $\sigma-$meson mass as $520\leq
m_{\sigma}\leq 580$ MeV and the concrete values depend on the input parameters
such as the couplings. Inversely fitting the experimental data, our results set
constraints on the couplings. The other relevant phenomenological parameters in
the model are simultaneously obtained.


title:
Experiments For CP-Violation: A Giant Liquid Argon Scintillation,
  Cerenkov And Charge Imaging Experiment ?

abstract:
  In this paper we address a class of ``ultimate'' generation experiments for
the search of CP-violation in neutrino oscillations. Neutrino factories require
large magnetized detectors. New generation superbeams or beta-beams need giant
detectors. The liquid Argon TPC technology has great potentials for both
applications. Although the ICARUS program has demonstrated that this technology
is mature, the possibility to built a giant liquid argon TPC is viewed by many
as a technically impossible and unsafe task. We argue that a giant liquid argon
Cerenkov and charge Imaging experiment would be an ideal match for a superbeam
or a betabeam. Such a detector would in addition cover a broad physics program,
including the observation of atmospheric neutrinos, solar neutrinos, supernova
neutrinos, and search for proton decays, in addition to the accelerator physics
program. We show a potential implementation of such a giant LAr detector and
argue that it could be technically feasible. The possibility to host such a
detector in an underground cavern is under study.


title:
Self-tuning of the cosmological constant and Einstein Gravity on the
  brane

abstract:
  We show that a self-tuning mechanism of the cosmological constant could work
in 5D non-compact space-time. The standard model matter fields live only on the
4D brane. The change of vacuum energy on the brane just gives rise to dynamical
shifts of the profiles of the background metric and a bulk scalar field in the
extra dimension, keeping 4D space-time flat. To obtain the Newtonian potential
on the brane, we introduce an additional brane-localized 4D Einstein-Hilbert
term.


title:
Anatomy of Prominent B and K Decays and Signatures of CP-Violating New
  Physics in the Electroweak Penguin Sector

abstract:
  The recent observation of B_d -> pi^0 pi^0 at the B factories with a
surprisingly large branching ratio represents a challenge for theory, and
complements the amazingly small B_d -> pi^+ pi^- rate. We point out that all
puzzling B -> pi pi features can be accommodated in the Standard Model (SM)
through non-factorizable hadronic interference effects, extract the relevant
parameters, and predict the CP asymmetries of B_d -> pi^0 pi^0. Using then
SU(3) flavour-symmetry and plausible dynamical assumptions, we fix the hadronic
B -> pi K parameters through their B -> pi pi counterparts, and determine the
CKM angle gamma, with a result in remarkable accordance with the usual fits for
the unitarity triangle. We may then analyse the B -> pi K system in the SM,
where we find agreement with the experimental picture, with the exception of
those observables that are significantly affected by electroweak (EW) penguins,
thereby suggesting new physics (NP) in this sector. Indeed, a moderate
enhancement of these topologies and a large CP-violating NP phase allow us to
describe any currently observed feature of the B -> pi K modes, and to predict
the CP-violating B_d -> pi^0 K_S observables. If we then restrict ourselves to
a specific scenario where NP enters only through Z^0 penguins, we obtain a link
to rare K and B decays, where the most spectacular NP effects are an
enhancement of the K_L -> pi^0 nu nu_bar rate by one order of magnitude with
BR(K_L -> pi^0 nu nu_bar) ~ 4 BR(K^+ -> pi^+ nu nu_bar), BR(K_L -> pi^0 e^+
e^-) = O(10^-10), (sin 2beta)_{pi nu nu_bar} < 0, and a large forward-backward
CP asymmetry in B_d -> K^* mu^+ mu^-. We address also epsilon'/epsilon and
other prominent decays, including B -> phi K and B -> J/psi K modes.


title:
CKM CP Violation in a Minimal SO(10) Model for Neutrinos and Its
  Implications

abstract:
  A minimal supersymmetric SO(10) model with one {\bf 10} and one {\bf 126}
Higgs superfield has recently been shown to predict all neutrino mixings as
well as the solar mass difference squared in agreement with observations. Two
assumptions critical to the predictivity and success of the model are that: (i)
the superpotential includes only renormalizable terms, thereby limiting the
number of free parameters and (ii) the triplet term in the type II seesaw
formula for neutrino mass dominates, leading to the sum rule M_nu = c(M_d -
M_e) that is responsible for large mixings. However, CKM CP phase is
constrained to be in the second or third quadrant requiring a significant
non-CKM component to CP violation to explain observations. We revisit this
issue using type I seesaw formula for neutrino masses and obtain the following
results: (i) we show that the above sumrule responsible for large mixing angles
can also emerge in type I seesaw models; the detailed predictions are however
not compatible with present data for any choice of CP phases. (ii) We then show
that addition of a nonrenormalizable term restores compatibility with neutrino
data and CKM CP violation both in type I and type II cases. We further find
that (iii) the MSSM parameter tan beta > 30 in the type I model and (iv) lepton
flavor violation and lepton electric dipole moments which are accessible to
proposed experiments in both type I and type II models. We also discuss the
unification of the gauge couplings in type I model which requires an
intermediate scale.


title:
Electromagnetic Structure of the $\rho$ Meson in the Light-Front Quark
  Model

abstract:
  We investigate the elastic form factors of the rho meson in the light-front
quark model(LFQM). With the phenomenologically accessible meson vertices
including the one obtained by the Melosh transformation frequently used in the
LFQM, we find that only the helicity $0\to 0$ matrix element of the plus
current receives the zero-mode contribution. We quantify the zero-mode
contribution in the helicity $0\to 0$ amplitude using the angular condition of
spin-1 system. After taking care of the zero-mode issue, we obtain the
magnetic($\mu$) and quadrupole($Q$) moments of the rho meson as $\mu=1.92$ and
$Q=0.43$, respectively, in the LFQM consistent with the Melosh transformation
and compare our results with other available theoretical predictions.


title: QCD phase diagram and the critical point

abstract:
  The recent progress in understanding the QCD phase diagram and the physics of
the QCD critical point is reviewed.


title: The MC@NLO 2.3 Event Generator

abstract:
  This is the user's manual of MC@NLO 2.3. This package is a practical
implementation, based upon the HERWIG event generator, of the MC@NLO formalism,
which allows one to incorporate NLO QCD matrix elements consistently into a
parton shower framework. Processes available in this version include the
hadroproduction of single vector and Higgs bosons, vector boson pairs, heavy
quark pairs, and lepton pairs. This document is self-contained, but we
emphasise the main differences with respect to previous versions.


title: Vector Condensate Model of Electroweak Interactions

abstract:
  In the standard model of electroweak interactions the Higgs doublet is
replaced by a complex vector doublet and a real vector singlet. The gauge
symmetry is broken dynamically by a mixed condensate of the doublet and singlet
vector fields. Gauge fields get their usual standard model masses by
condensation. The new vector matter fields become massive by their gauge
invariant selfcouplings. Fermions are assigned to the gauge group in the usual
manner. Fermion masses are coming from a gauge invariant fermion-vector field
interaction by a mixed condensate. The Kobayashi-Maskawa description is
unchanged. It is shown that from the new matter fields a large number of
spin-one particle pairs is expected at future high energy e^{+}e^{-} linear
colliders of 500-1500 GeV.


title: Higgsless fermion masses and unitarity

abstract:
  We discuss the consistency of fermion mass generation by boundary conditions
and brane localized terms in higher dimensional Higgsless models of gauge
symmetry breaking. The sum rules imposed by tree-level unitarity and Ward
Identities are applied to check the consistency of mass generation by orbifold
projections and more general boundary conditions consistent with the
variational principle. We find that the sum rules are satisfied for boundary
conditions corresponding to brane localized mass and kinetic terms consistent
with the reduced gauge symmetry on the brane.


title: Candidates for Inflaton in Quiver Gauge Theory

abstract:
  The inflaton necessary to implement the mechanism of inflationary cosmology
has natural candidates in quiver gauge theory. We discuss the dimensionless
coefficients of quartic couplings and enumerate scalars which are singlet under
the low-energy gauge group. The inflaton mass is generally predicted to be in
the TeV region, close to 4 TeV for one specific unified model. A quartic
inflaton potential, and a mutated hybrid inflation, are discussed. They can
give adequate inflation and appropriate fluctuations but different spectral
indices.


title:
Improving Extractions of |Vcb| and mb from the Hadronic Invariant Mass
  Moments of Semileptonic Inclusive B decay

abstract:
  We calculate the hadronic tensor for inclusive semileptonic B decay to
O(alpha_s). This allows O(alpha_s Lambda_{QCD}/mb) corrections to hadronic
invariant mass observables to be directly evaluated with experimentally
required cuts on phase space. Several moments of phenomenological interest are
presented to O(alpha_s Lambda_{QCD}/mb) and O(Lambda_{QCD}^3/mb^3), allowing a
consistent extraction of the HQET parameters up to O(Lambda_{QCD}^3/mb^3) and
the b quark mass with theoretical error ~ 50 MeV. The hadronic invariant mass
spectrum is examined with a general moment to obtain observables that test the
theoretical error estimate assigned to these parameters; in particular,
fractional moments that directly test the OPE for inconsistencies in the
hadronic invariant mass spectrum are reported. The mb Lambda_{QCD}/mc^2
expansion present for fractional moments of the hadronic invariant mass spectum
is discussed and shown to introduce a numerically suppressed uncertainty of
O(mb^4 Lambda_{QCD}^4/mc^8).


title:
From Hierarchical to Partially Degenerate Neutrinos via Type II Upgrade
  of Type I See-Saw Models

abstract:
  We propose a type II upgrade of type I see-saw models leading to new classes
of models where partially degenerate neutrinos are as natural as hierarchical
ones. The additional type II contribution to the neutrino mass matrix, which
determines the neutrino mass scale, is forced to be proportional to the unit
matrix by a SO(3) flavour symmetry. The type I see-saw part of the neutrino
mass matrix, which controls the mass squared differences and mixing angles, may
be governed by sequential right-handed neutrino dominance and a natural
alignment for the SO(3)-breaking vacuum. We focus on classes of models with
bi-large mixing originating from the neutrino mass matrix although we also
briefly discuss other classes of models where large mixing stems from the
charged lepton mass matrix. We study renormalization group corrections to the
neutrino mass squared differences and mixings and find that the low energy
values do not depend sensitively on the high energy values for partially
degenerate neutrinos with a mass scale up to about 0.15 eV. Our scenario
predicts the effective mass for neutrinoless double beta decay to be
approximately equal to the neutrino mass scale and therefore neutrinoless
double beta decay will be observable if the neutrino mass spectrum is partially
degenerate. We also find that all observable CP phases as well as $\theta_{13}$
become small as the neutrino mass scale increases.


title:
The minimal supersymmetric grand unified theory: I. symmetry breaking
  and the particle spectrum

abstract:
  We discuss in detail the symmetry breaking and related issues in the minimal
renormalizable supersymmetric grand unified theory. We compute the particle
spectrum and study its impact on the physical scales of the theory. This
provides a framework for the analysis of phenomenological implications of the
theory, to be carried out in part II.


title: MSSM Higgs Boson Production from Supersymmetric Cascades at LHC

abstract:
  Detectability of MSSM Higgs bosons in cascade decays of supersymmetric
particles at the CERN LHC is discussed.


title: Small Q-D neutrino masses from a generic lepton mass hierarchy

abstract:
  Exponential lepton mass ratios are studied in a low energy phenomenology. In
view of the known data, the mass patterns of the charged leptons and widely
discussed quasi-degenerate neutrinos are related to one another by two
different traits - opposite mass ratios with large versus small exponents, and
probably conformable mass-degeneracy-deviation hierarchies. The
solar-atmospheric hierarchy parameter should have a special physical meaning in
the Q-D neutrino scenario. A general generic hierarchy equation with two
opposite solutions respectively for the charged lepton and neutrino mass ratios
is considered. It determines a small upper bound on the Q-D neutrino mass
scale, with estimations: m = 0.30 eV at 90% C.L., and m = 0.18 eV at best-fit
mass-squared differences.


title: GUT Phase Transition and Hybrid Inflation

abstract:
  The supersymmetric model of hybrid inflation is interesting not only because
of its naturalness but also because of another reason. Its energy scale
determined by the COBE normalization is 10^15 - 10^16 GeV. It happens to be the
energy scale of interest in particle physics, namely, the mass scale of
right-handed neutrinos or the energy scale of the gauge-coupling unification.
It is true that topological defects are produced after the hybrid inflation if
it is related to a U(1)_B-L or a GUT-symmetry breaking, and hence one cannot
naively identify models of particle physics with that of inflation. But those
defects are not necessarily found in modified models. We show in this article
that quite a simple extension of the minimal supersymmetric hybrid inflation
model is free from monopoles or cosmic strings. Moreover, it happens to be
exactly the same as a well-motivated extension of SU(5)-unified theories. The
vacuum energy is dominated by F-term. The \eta-problem is not necessarily
serious when the model is realized by D-branes. Although it has been considered
that a coupling constant has to be very small when the vacuum energy is
dominated by F-term, this constraint is not applied either to the D-brane
model. They are due to a particular form of the Kahler potential and
interaction of the model. Reheating process is also discussed.


title: Slow-roll parameters in braneworld cosmologies

abstract:
  We present a general slow-roll formalism within braneworld-motivated
cosmologies with non-standard effective Friedmann equations. Full towers of
parameters involving either the inflaton potential or the Hubble parameter are
constructed and the dynamics of non-tachyonic and tachyonic fields are
considered in detail; exact cosmological solutions and the inflationary
attractor condition are provided. We compare scalar-driven and tachyon-driven
accelerating eras through slow-roll correspondence and the observational
imprint on early-universe structures.


title: Polarization precession in photon-photon encounters

abstract:
  We calculate the rate of precession of the direction of polarization of a
photon traversing a sea of plane-polarized photons moving in the opposed
direction, where the interaction is the one-loop "vacuum" Heisenberg-Euler
coupling of four fields. Substantial precession can take place in a distance
many orders of magnitude shorter than the free path for photon-photon
scattering, mediated by the same interaction. We consider briefly the
possibility of some interesting collective effects in the case in which instead
of a particle and a sea, two seas are caused to collide.


title: Neutrinos from SN1987A: flavor conversion and interpretation of results

abstract:
  After recent results from solar neutrino experiments and KamLAND we know that
neutrinos from SN1987A underwent flavor conversion. This must be taken into
account in the analysis of the data. Assuming the normal mass hierarchy of
neutrinos we calculate the permutation factors p for the Kamiokande-2, IMB and
Baksan detectors. The conversion inside the star leads to p = 0.28 - 0.32;
regeneration effects inside the Earth reduce this factor down to 0.15 - 0.20
(at E = 40 MeV). We study in details the influence of conversion on the
observed signal depending on the parameters of the original neutrino spectra.
For a given set of these parameters, the conversion could increase the average
energy of the observed events by up to 50 % and the number of events by a
factor of 2 at Kamiokande-2 and of 3 - 5 at IMB. Inversely, we find that
neglecting the conversion effects can lead up to 50 % error in the
determination of the average energy of the original antinu_e flux and about 50
% error on its luminosity. By comparison with experimental data we conclude
that the Kamiokande-2 data alone do not favor strong conversion effect. In
contrast, the combined analysis of the Kamiokande and IMB results slightly
favors strong conversion effects (that is, large difference of the original
spectra). In comparison with the no oscillation case, the latter require lower
average energy and higher luminosity of the original antinu_e flux.


title:
Observables with tau leptons at LHC and LC structure of event records
  and Monte Carlo Algorithms

abstract:
  In the present report, let us adress the issues related to simulation of
decays for particle embodied in full production and decay chains of Monte Carlo
programs set-up for experiments such as at LHC or LC. Both technical issues
related to the way how the events may be stored in event records and issues
related to physics (in particular non-factorizable correlations of the
Einstein-Rosen-Podolsky type) will be reviewed on the basis of practical
examples. We will limit our discussion to the case of tau lepton and W boson
decays, but similar problems (and solutions) may arise also in case of
simulation for other intermediate states or particles. Examples related to
construction of physics observables will be also given. In particular the
method of measuring the CP parity properties of the h-tau-tau coupling at LC
will be explained.


title: Physical renormalization condition for the quark-mixing matrix

abstract:
  We investigate the renormalization of the quark-mixing matrix in the
Electroweak Standard Model. We show that the corresponding counterterms must be
gauge independent as a consequence of extended BRS invariance. Using rigid
SU(2)_L symmetry, we proof that the ultraviolet-divergent parts of the
invariant counterterms are related to the field renormalization constants of
the quark fields. We point out that for a general class of renormalization
schemes rigid SU(2)_L symmetry cannot be preserved in its classical form, but
is renormalized by finite counterterms. Finally, we discuss a genuine physical
renormalization condition for the quark-mixing matrix that is gauge independent
and does not destroy the symmetry between quark generations.


title:
Expansion around half-integer values, binomial sums and inverse binomial
  sums

abstract:
  I consider the expansion of transcendental functions in a small parameter
around rational numbers. This includes in particular the expansion around
half-integer values. I present algorithms which are suitable for an
implementation within a symbolic computer algebra system. The method is an
extension of the technique of nested sums. The algorithms allow in addition the
evaluation of binomial sums, inverse binomial sums and generalizations thereof.


title: Two-Loop Tensor Integrals in Quantum Field Theory

abstract:
  A comprehensive study is performed of general massive, tensor, two-loop
Feynman diagrams with two and three external legs. Reduction to generalized
scalar functions is discussed. Integral representations, supporting the same
class of smoothness algorithms already employed for the numerical evaluation of
ordinary scalar functions, are introduced for each family of diagrams.


title: Lorentz-violating dispersion relations and threshold analyses

abstract:
  Remnant low-energy effects of Planck-scale Lorentz breaking in candidate
fundamental theories typically include modified one-particle dispersion
relations. Theoretical constraints on such modifications are discussed leading
to the exclusion of a variety of previously considered Lorentz-violating
parameters. In particular, the fundamental principle of coordinate
independence, the role of an effective dynamical framework, and the conditions
of positivity and causality are investigated.


title:
Full one-loop corrections to neutralino pair production in e+e-
  annihilation

abstract:
  We present the full one-loop radiative corrections to pair production of
neutralinos in e+e- collisions within the Minimal Supersymmetric Standard
Model. Particular attention is paid to the definition of weak and QED
corrections. The non-universal QED corrections are extracted by subtracting the
initial state radiation. We give numerical results for two different SUSY
scenarios for e+e- -> neu_1 neu_2 and e+e- -> neu_2 neu_2. The weak and QED
corrections are up to several percent or even higher and need to be taken into
account at future linear collider experiments.


title: Decay modes of ideally mixed narrow pentaquark states

abstract:
  We investigate the decay modes of pentaquark baryons for both the
antidecuplet and the octet states, which were recently claimed by Close and
Dudek to be potentially narrow due to a hidden selection rule. We discuss how
ideal mixing between the pentaquark octet and antidecuplet states can be
related to the OZI rule, which also naturally leads to certain selection rules
in the pentaquark decays. We then introduce a tensor representation for the
pentaquark states, and present the possible decay modes for both the unmixed
and ideally mixed pentaquark octet and antidecuplet states. The exclusive decay
modes can be used to experimentally search for the other pentaquark states.


title: Linear sigma model at finite temperature

abstract:
  The chiral phase transition is investigated within the framework of thermal
field theory using the O(N) linear sigma model as an effective theory. We
calculate the thermal effective potential by using the
Cornwall-Jackiw-Tomboulis formalism of composite operators. The thermal
effective potential is calculated for N=4 involving as usual the sigma and the
three pions, and in the large-N approximation involving N-1 pion fields. In
both cases, the system of the resulting gap equations for the thermal effective
masses of the particles has been solved numerically, and we have investigated
the evolution of the effective potential. In the N=4 case, there is indication
of a first-order phase transition, while in the large N approximation the phase
transition appears as second-order. In this analysis, we have ignored quantum
fluctuations and have used the imaginary time formalism for calculations. We
have extended our calculation in order to include the full effect of two loops
in the calculation of the effective potential. In this case, the effective
masses are momentum dependent. In order to perform the calculations, we found
the real time formalism to be convenient. We have calculated the effective
masses of pions at the low-temperature phase and we found a quadratic
dependence on temperature, in contrast to the Hartree case, where the mass is
proportional to temperature. The sigma mass was investigated in the presence of
massive pions, and we found a small deviation compared to the Hartree case. In
all cases, the system approaches the behaviour of the ideal gas at the high
temperature limit.


title: What is the Evidence for the Color Glass Condensate?

abstract:
  I introduce the concept of the Color Glass Condensate. I review data from
HERA and RHIC which suggest that such a universal form of matter has been
found.


title: Production of the pentaquark $\Theta^+$ in $np$ scattering

abstract:
  We study $np\to \Lambda\Theta^{+}$ and $np\to \Sigma^{0}\Theta^{+}$ processes
for both of the positive and negative parities of the $\Theta^{+}$. Employing
the effective chiral Lagrangians for the $KNY$ and $K^*NY$ interactions, we
calculate differential cross sections as well as total cross sections for the
$np\to \Sigma^0 \Theta^+$ and $np\to \Lambda\Theta^+$ reactions. The total
cross sections for the positive-parity $\Theta^+$ turn out to be approximately
ten times larger than those for the negative parity $\Theta^+$ in the range of
the CM energy $\sqrt{s}_{\rm th}\le \sqrt{s}\le 3.5 {\rm GeV}$. The results are
rather sensitive to the mechanism of $K$ exchanges in the $t$ -- channel.


title:
Complete description of polarization effects in emission of a photon by
  an electron in the field of a strong laser wave

abstract:
  We consider emission of a photon by an electron in the field of a strong
laser wave. Polarization effects in this process are important for a number of
physical problems. A probability of this process for circularly or linearly
polarized laser photons and for arbitrary polarization of all other particles
is calculated. We obtain the complete set of functions which describe such a
probability in a compact invariant form. Besides, we discuss in some detail the
polarization effects in the kinematics relevant to the problem of electron to
photon conversion at photon-photon and photon-electron colliders.


title: Probing the nature of the seesaw in renormalizable SO(10)

abstract:
  We study the nature of the see-saw mechanism in the context of renormalizable
SO(10) with Higgs fields in the 10-plets and 126-plet representations, paying
special attention to the supersymmetric case. We discuss analytically the
situation for the second and third generations of fermions ignoring any CP
violating phase. It is shown that b-tau unification and large atmospheric
mixing angle strongly disfavor the dominance of the type I see-saw.


title: Pentaquark $\Theta^+$ mass and width in dense matter

abstract:
  We investigate medium modifications of the pentaquark $\Theta^+$ in dense
medium, taking into account different parities of the exotic $\Theta^+$ baryon.
We find that the chemical potential of the $\Theta^+$ is shifted in a
density-dependent way to one-loop order. We also investigated the effect of the
scaled nucleon mass in dense medium on the $\Theta^+$ propagator. The results
turn out to depend sensitively on the scaled nucleon mass and on the parity of
the $\Theta^+$.


title: Branons as dark matter

abstract:
  In the brane-world scenario with low tension, brane fluctuations (branons)
together with the Standard Model particles are the only relevant degrees of
freedom at low energies. Branons are stable, weakly interacting, massive
particles and their relic abundance can account for the dark matter of the
universe. In a certain range of the parameter space, they could be detectable
by future direct search experiments.


title:
Spontaneous Scherk-Schwarz supersymmetry breaking and radion
  stabilization

abstract:
  In this talk I review the issues of supersymmetry breaking and radion
stabilization in a five dimensional theory compactified on the Z_2 orbifold.
Supersymmetry breaking by Scherk-Schwarz boundary conditions is interpreted as
spontaneous breaking of local supersymmetry by the Hosotani mechanism. The
auxiliary field responsible for spontaneous supersymmetry breaking is inside
the five-dimensional off-shell minimal supergravity multiplet. Different ways
of fixing the supersymmetry breaking order parameter are analyzed. In the
presence of supersymmetry breaking the one-loop effective potential for the
radion has a minimum that fixes its vacuum expectation value. The radion is
stabilized in a metastable Minkowski_4 minimum (versus the AdS_4 vacuum) with a
mass in the meV range making it interesting for future deviations from the
gravitational inverse-square law.


title: Present Status of GRACE/SUSY

abstract:
  We have developed the system for the automatic computation of cross-sections,
{\tt GRACE/SUSY}, including the one-loop calculations for processes of the
minimal supersymmetric extension of the the standard model. For an application,
we investigate the pair-production of the heavy chargino in electron-positron
collisions.


title: Automatic one-loop calculation of MSSM processes with GRACE

abstract:
  We have developed the system for the automatic computation of cross-sections,
{\tt GRACE/SUSY}, including the one-loop calculations for processes of the
minimal supersymmetric extension of the the standard model. For an application,
we investigate the process $e^+ e^- \to Z^0 h^0$ .


title:
Matrix-Element Corrections to Parton Shower Simulations for Higgs
  Hadroproduction

abstract:
  We implement matrix-element corrections to HERWIG parton shower simulations
for Standard Model Higgs boson production at hadron colliders. We study the
Higgs transverse momentum distribution and compare different versions of HERWIG
and resummed calculations. The HERWIG results exhibit a remarkable improvement
as many more events are generated at large transverse momentum after the
inclusion of matrix-element corrections.


title:
Contribution of dimension-six bosonic operators to Higgs decay into two
  photons at one-loop level

abstract:
  The decay of the Higgs boson into two photons is examined in a
model-independent way within the effective Lagrangian approach. Contribution of
one-loop diagrams including SU(2) x U(1) invariant dimension-six bosonic
operators is evaluated explicitly. The calculation is intended to fill a gap
that exists in the current literature of the subject.


title: Lattice Field Theory: past, present and future

abstract:
  This letter is in response to a recent review by DeTar and Gottlieb about
lattice QCD that has recently appeared in Physics Today. It also is partially
motivated by a separate review written by DeGrand. My basic point is that one
should be more responsible when presenting numerical results as coming from
{\sl ab initio} calculations. In turn, this leads me to the suggestion that in
lattice field theory one should go back to computational support going directly
to small groups, including groups containing only a single researcher, rather
than concentrating most of the funds into the hands of few large
collaborations.


title: Matrix-element corrections to gg/qqbar -> Higgs in HERWIG

abstract:
  We describe the HERWIG implementation of real matrix-element corrections to
direct Higgs hadroproduction at Tevatron and Large Hadron Collider (LHC) and
compare it to other approaches existing in literature and describing the
transverse momentum distribution of the Higgs boson.


title: The Chiral Soliton Model for Arbitrary Colors and Flavors

abstract:
  The quantum numbers of the chiral soliton are derived for an arbitrary number
of colors and flavors.


title: Positronium as a probe for new physics beyond the standard model

abstract:
  We discuss and summarize some aspects concerning the study of the positronium
system to probe new physics beyond the Standard Model.


title: A Calculational Formalism for One-Loop Integrals

abstract:
  We construct a specific formalism for calculating the one-loop virtual
corrections for standard model processes with an arbitrary number of external
legs. The procedure explicitly separates the infrared and ultraviolet
divergences analytically from the finite one-loop contributions, which can then
be evaluated numerically using recursion relations. Using the formalism
outlined in this paper, we are in position to construct the next-to-leading
order corrections to a variety of multi-leg QCD processes such as multi-jet
production and vector-boson(s) plus multi-jet production at hadron colliders.
The final limiting factor on the number of particles will be the available
computer power.


title: A Lecture on Neutrinos

abstract:
  The major steps in the development of our knowledge about neutrinos are
reviewed. The basics of neutrino oscillation formalism is presented. Neutrino
oscillations in the framework of three-neutrino mixing are considered. The
evidence for neutrino oscillations is discussed.


title:
Relativistic theory of inverse beta-decay of polarized neutron in strong
  magnetic field

abstract:
  The relativistic theory of the inverse beta-decay of polarized neutron, $\nu
_{e} + n \to p + e ^{-}$, in strong magnetic field is developed. For the proton
wave function we use the exact solution of the Dirac equation in the magnetic
filed that enables us to account exactly for effects of the proton momentum
quantization in the magnetic field and also for the proton recoil motion. The
effect of nucleons anomalous magnetic moments in strong magnetic fields is also
discussed. We examine the cross section for different energies and directions
of propagation of the initial neutrino accounting for neutrons polarization. It
is shown that in the super-strong magnetic field the totally polarized neutron
matter is transparent for neutrinos propagating antiparallel to the direction
of polarization. The developed relativistic approach can be used for
calculations of cross sections of the other URCA processes in strong magnetic
fields.


title: Can Neutrino Mixings Arise from the Charged Lepton Sector?

abstract:
  The neutrino mixing matrix U is in general of the form U=U_e^+ U_nu, where
U_e arises from the diagonalization of charged leptons and U_nu is from the
neutrino sector. We discuss the possibility that U_nu is nearly diagonal (in
the lagrangian basis) and the observed mixing arises with good accuracy from
U_e. We find that the fact that, in addition to the nearly maximal atmospheric
mixing angle theta_{23}, the solar angle theta_{12} is definitely also large
while at the same time the third mixing angle theta_{13} is small, makes the
construction of a natural model of this sort considerably more complicated. We
present an example of a natural model of this class. We also find that the case
that U_nu is exactly of the bimixing type is severely constrained by the bound
on theta_{13} but not excluded. We show that planned experimental searches for
theta_{13} could have a strong impact on bimixing models.


title: Two-body $Z'$ decays in the minimal 331 model

abstract:
  The two-body decays of the extra neutral boson Z_2 predicted by the minimal
331 model are analyzed. At the three-level it can decay into standard model
particles as well as exotic quarks and the new gauge bosons predicted by the
model. The decays into a lepton pair are strongly suppressed, with $Br(Z_2 -->
l^+l^-) ~ 10^{-2}$ and $Br(Z_2 --> \bar{\nu}_l \nu) ~ 10^{-3}$. In the bosonic
sector, Z_2 would decay mainly into a pair of bilepton gauge bosons, with a
branching ratio below the 0.1 level. The Z_2 boson has thus a leptophobic and
bileptophobic nature and it would decay dominantly into quark pairs. The
anomaly-induced decays $Z_2 --> Z_1\gamma$ and $Z_2 --> Z_1Z_1$, which occurs
at the one-loop level are studied. It is found that $Br(Z_2 --> Z_1\gamma) ~
10^{-9}$ and $Br(Z_2 --> Z_1Z_1) ~ 10^{-6}$ at most. As for the $Z_2 -->
W^+W^-$ and $Z_2 --> Z_1H$ decays, with H a relatively light Higgs boson, they
are induced via Z'-Z mixing. It is obtained that $Br(Z_2 --> W^+W^-) ~ 10^{-2}$
and $Br (Z_2 --> Z_1H) ~ 10^{-5}$. We also examine the flavor changing neutral
current decays $Z_2 --> tc$ and $Z_2 --> tu$, which may have branching
fractions as large as $10^{-3}$ and $10^{-5}$, respectively, and thus may be of
phenomenological interest.


title:
Dynamical symmetry breaking in Gauge-Higgs unification of 5D ${\mathcal
  N}=1$ SUSY theory

abstract:
  We study the dynamical symmetry breaking in the gauge-Higgs unification of
the 5D ${\mathcal N}=1$ SUSY theory, compactified on an orbifold, $S^1/Z_2$.
This theory identifies Wilson line degrees of freedoms as ``Higgs doublets''.
We consider $SU(3)_c \times SU(3)_W$ and SU(6) models, in which the gauge
symmetries are reduced to $SU(3)_c \times SU(2)_L \times U(1)_Y$ and $SU(3)_c
\times SU(2)_L \times U(1)_Y \times U(1)$, respectively, through the
orbifolding boundary conditions. Quarks and leptons are bulk fields, so that
Yukawa interactions can be derived from the 5D gauge interactions. We estimate
the one loop effective potential of ``Higgs doublets'', and analyze the vacuum
structures in these two models. We find that the effects of bulk quarks and
leptons destabilize the suitable electro-weak vacuum. We show that the
introduction of suitable numbers of extra bulk fields possessing the suitable
representations can realize the appropriate electro-weak symmetry breaking.


title: QCD anomalies in hadronic weak decays

abstract:
  We consider the flavour-changing operators associated with the strong axial
and trace anomalies. Their short-distance generation through penguin-like
diagrams is obtained within the QCD external field formalism. Standard-model
operator evolution exhibits a suppression of anomalous effects in K and B
hadronic weak decays. A genuine set of dimension-eight Delta S = 1 operators is
also displayed.


title:
Why do we need higher order fully exclusive Monte Carlo generator for
  Higgs boson production from heavy quark fusion at LHC?

abstract:
  In this paper we argue that having available higher order fully exclusive
Monte Carlo generator for Higgs boson production from heavy quark fusion will
be mandatory for data analysis at LHC. The H to tau tau channel, a key for
early discovery of the Higgs boson in the MSSM scenario, is discussed. With
simplified example and for mH = 120 GeV we show, that depending on choice among
presently available approaches, used for simulation of Higgs boson production
from b bbar H Yukawa coupling, final acceptance for the signal events being
reconstructed inside mass window may differ by a factor of 3. The spread is
even larger (up to a factor of 10) for other production mechanisms (promising
for some regions of the MSSM parameter space). The complete analysis, which
necessarily will add stringent requirements for background rejection (such as
identification of b-jet or veto on b-jet) and which will require statistical
combination of samples selected with different selection criteria may only
enhance the uncertainty.


title: Product-Group Unification in Type IIB String Thoery

abstract:
  The product-group unification is a model of unified theories, in which
masslessness of the two Higgs doublets and absence of dimension-five proton
decay are guaranteed by a symmetry. It is based on SU(5) x U(N) (N=2,3) gauge
group. It is known that various features of the model are explained naturally,
when it is embedded in a brane world. This article describes an idea of how to
accommodate all the particles of the model in Type IIB brane world. The
GUT-breaking sector is realized by a D3--D7 system, and chiral quarks and
leptons arise from intersection of D7-branes. The D-brane configuration can be
a geometric realization of the non-parallel family structure of quarks and
leptons, an idea proposed to explain the large mixing angles observed in the
neutrino oscillation. The tri-linear interaction of the next-to-minimal
supersymmetric standard model is obtained naturally in some cases.


title: Uncertainties in Relic Density Calculations in mSUGRA

abstract:
  We compare the relic density of neutralino dark matter within the minimal
supergravity model (mSUGRA) using four different public codes for
supersymmetric spectra evaluation. While the predictions for the relic density
of neutralinos are rather stable in most of the mSUGRA space, it is in the most
physically interesting regions that large discrepancies can be observed, in
particular the focus point, large tan beta and coannihilation regions.


title: Low Energy Neutrino Physics after SNO and KamLAND

abstract:
  In the recent years important discoveries in the field of low energy neutrino
physics (E$_\nu$ in the $\approx$ MeV range) have been achieved. Results of the
solar neutrino experiment SNO show clearly flavor transitions from $\nu_e$ to
$\nu_{\mu,\tau}$. In addition, the long standing solar neutrino problem is
basically solved. With KamLAND, an experiment measuring neutrinos emitted from
nuclear reactors at large distances, evidence for neutrino oscillations has
been found. The values for the oscillation parameters, amplitude and phase,
have been restricted. In this paper the potential of future projects in low
energy neutrino physics is discussed. This encompasses future solar and reactor
experiments as well as the direct search for neutrino masses. Finally the
potential of a large liquid scintillator detector in an underground laboratory
for supernova neutrino detection, solar neutrino detection, and the search for
proton decay $p \to K^+ \nu $ is discussed.


title: Excitation of Physical Vacuum

abstract:
  Introducing such a notion as a "excitation of physical vacuum" we do an
attempt to explain some strange experimental facts such as large value of
$\sigma$-term measured in pion-nucleon low energy scattering, $\Delta T=1/2$
rule in kaon two pion decay modes, the ratio of strange to nonstrange yield in
low energy proton-antiproton annihilation, excess of soft photons in hadron's
collisions. As a test of our approach we suggest to measure the multiparticle
production processes and decays of heavy virtual objects.


title:
Is There Only One Solution of the Dyson-Schwinger Equation for Quark
  Propagator in the Case of Non-zero Current Quark Mass

abstract:
  In this letter it is shown on general ground that there exist two
qualitatively distinct solutions of the Dyson-Schwinger equation for the quark
propagator in the case of non-zero current quark mass. One solution corresponds
to the ``Nambu-Goldstone'' phase and the other one corresponds to the
``Wigner'' phase in the chiral limit.


title:
Hadron structure in manifestly Lorentz-invariant baryon chiral
  perturbation theory

abstract:
  We briefly outline the so-called extended on-mass-shell renormalization
scheme for manifestly Lorentz-invariant baryon chiral perturbation theory which
provides a simple and consistent power counting for renormalized diagrams. We
comment on the role of chiral symmetry in the renormalization program and
discuss as applications the mass and the electromagnetic form factors of the
nucleon.


title:
Further remarks on electroweak moments of baryons and manifestations of
  broken SU(3)

abstract:
  The role of nonvalence, {\it e.g.} sea quarks and/or meson degrees of freedom
in static and quasistatic baryon electroweak observables, is discussed within
the phenomenological sum rule approach. The inclusion of nonvalence degrees of
freedom in the analysis of baryon magnetic moments explains extremely strong
violation of the standard SU(6) symmetry-based quark-model prediction for the
magnetic moment ratio $R_{\Sigma /\Lambda}=(\Sigma^{+} +
2\Sigma^{-})/(-\Lambda) \simeq .23$, while the value $R_{\Sigma
/\Lambda}(SU(6))= 1$ corresponds to the nonrelativistic quark model. We also
obtain $F/D=.72$ for the quark-current-baryon coupling $SU(3)_{f}$ ratio. The
implications for the "strangeness" magnetism of the nucleon and for weak
axial-to-vector coupling constant relations measured in the lowest octet baryon
$\beta$-decays are discussed. The latter shows up the possible role of the
induced second-class form factor (the "weak- electricity", or pseudotensor form
factor) in the extraction of the $(g_1/f_1)$-values from the hyperon's
$\beta$-decay data.


title:
High energy behavior of quark elastic form factors within the Wilson
  integral approach: perturbative and nonperturbative contributions

abstract:
  The Wilson contour integral approach is applied to resum the soft gluon
radiative correctins to the quark form factors in the Sudakov regime. The
one-loop order results for the quark-photon (color singlet form factor) and
quark-gluon (color non-singlet form factor) vertices are presented. The
explicit expressions for the vacuum averaged contour integrals in $g^2$
accuracy are derived for an arbitrary gauge field. The corresponding one-loop
cusp anomalous dimensions are found in the case of perturbative gluon field in
arbitrary covariant gauge. It is shown that the gauge dependence drops out from
the leading high energy behavior.


title: Black Holes in Theories with Large Extra Dimensions: a Review

abstract:
  We start by reviewing the existing literature on the creation of black holes
during high-energy particle collisions, both in the absence and in the presence
of extra, compact, spacelike dimensions. Then, we discuss in detail the
properties of the produced higher-dimensional black holes, namely the horizon
radius, temperature and life-time, as well as the physics that governs the
evaporation of these objects, through the emission of Hawking radiation. We
first study the emission of visible Hawking radiation on the brane: we derive a
master equation for the propagation of fields with arbitrary spin in the
induced-on-the-brane black hole background, and we review all existing results
in the literature for the emission of scalars, fermions and gauge bosons during
the spin-down and Schwarzschild phases of the life of the black hole. Both
analytical and numerical results for the greybody factors and radiation spectra
are reviewed and exact results for the number and type of fields emitted on the
brane as a function of the dimensionality of spacetime are discussed. We
finally study the emission of Hawking radiation in the bulk: greybody factors
and radiation spectra are presented for the emission of scalar modes, and the
ratio of the missing energy over the visible one is calculated for different
values of the number of extra dimensions.


title:
The effect of supersymmetric CP phases on Chargino-Pair Production via
  Drell-Yan Process at the LHC

abstract:
  We compute the rates for pp annihilation into chargino-pairs via Drell-Yan
process taking into account the effects of supersymmetric soft phases, at
proton-proton collider. In particular, the phase of the mu parameter gains
direct accessibility via the production of dissimilar charginos. The phases of
the trilinear soft masses do not have a significant effect on the cross
sections.


title:
Predictions for hadron polarizations and left-right asymmetry in
  inclusive reactions involving photons

abstract:
  A phenomenological model which has had some success in explaining
polarization phenomena and left-right asymmetry in inclusive proton-proton
scattering is considered for reactions involving photons. In particular, the
reactions (a) $ \gamma + p \to H + X;$ (b) $\gamma + p (\uparrow) \to \pi^{\pm}
+ X $ and (c) $p(\uparrow) + p \to \gamma + X$ are considered where $\gamma =$
resolved photon and hyperon $ H = \Lambda^0, \Sigma^{\pm}$ etc. Predictions for
hyperon polarization in (a) and the asymmetry (in (b) and (c)) provide further
tests of this particular model. Feasibility of observing (b) at HERA and the
effect of the polarization of the sea in the proton in $p (\uparrow) + p \to
\pi^{\pm} + X$ is briefly discussed.


title:
Relative yield of charged and neutral heavy meson pairs in e^+ e^-
  annihilation near threshold

abstract:
  The subject of the charged-to-neutral yield ratio for B{\bar B} and D{\bar
D}pairs near their respective thresholds in e^+e^- annihilation is revisited.
As previously argued for the B mesons, this ratio should exhibit a substantial
variation across the Upsilon(4S) resonance due to interference of the resonance
scattering phase with the Coulomb interaction between the charged mesons. A
simple alternative derivation of the expression describing this effect is
presented here, and the analysis is extended to include the D meson production
in the region of the psi(3770) resonance. The available data on Kaon production
at the phi(1020) resonance are also discussed in connection with the expected
variation of the charged-to-neutral yield ratio.


title:
Discovering the Higgs Bosons of Minimal Supersymmetry with Muons and a
  Bottom Quark

abstract:
  We investigate the prospects for the discovery at the CERN Large Hadron
Collider of a neutral Higgs boson produced with one bottom quark followed by
Higgs decay into a muon pair. We work within the framework of the minimal
supersymmetric model. The dominant physics background from the production of $b
\mu^+\mu^-$, $j\mu^+\mu^-$, j=g,u,d,s,c, and $b {\bar b} W^+W^-$ is calculated
with realistic acceptance cuts. Promising results are found for the CP-odd
pseudoscalar ($A^0$) and the heavier CP-even scalar ($H^0$) Higgs bosons with
masses up to 600 GeV. This discovery channel with one energetic bottom quark
greatly improves the discovery potential of the LHC beyond the inclusive
channel $pp\to \phi^0\to \mu^+\mu^- +X$.


title:
Small x behavior of parton distributions. A study of higher twist
  effects

abstract:
  Higher twist corrections to the structure function F_2 at small x are studied
for the case of a flat initial condition for the twist-two QCD evolution in the
next-to-leading order approximation. We present an analytical parameterization
of the contributions from the twist-two and higher twist operators of the
Wilson operator product expansion. Higher twist terms are evaluated using two
different approaches, one motivated by BFKL and the other motivated by the
renormalon formalism. The results of the latter approach are in very good
agreement with deep inelastic scattering data from HERA.


title: The masses of weakly-coupled scalar fields in the early Universe

abstract:
  We consider the effective mass-squared in the early Universe, of a scalar
field which has only Planck-suppressed couplings with light fields and whose
true mass is less than the Hubble parameter $H$. A detailed investigation shows
that the effective mass-squared generically is of order $\pm H^2$ during
inflation and matter-domination, but much smaller during radiation domination.
We consider the special circumstances under which the mass-squared may be much
bigger or much smaller than the generic value.


title:
Series expansions for three-flavor neutrino oscillation probabilities in
  matter

abstract:
  We present a number of complete sets of series expansion formulas for
neutrino oscillation probabilities in matter of constant density for three
flavors. In particular, we study expansions in the mass hierarchy parameter
$\alpha \equiv \Delta m_{21}^2/\Delta m_{31}^2$ and mixing parameter $s_{13}
\equiv \sin \theta_{13}$ up to second order and expansions only in $\alpha$ and
only in $s_{13}$ up to first order. For each type of expansion we also present
the corresponding formulas for neutrino oscillations in vacuum.We perform a
detailed analysis of the accuracy of the different sets of series expansion
formulas and investigate which type of expansion is most accurate in different
regions of the parameter space spanned by the neutrino energy E, the baseline
length L, and the expansion parameters $\alpha$ and $s_{13}$.We also present
the formulas for series expansions in $\alpha$ and in $s_{13}$ up to first
order for the case of arbitrary matter density profiles. Furthermore, it is
shown that in general all the 18 neutrino and antineutrino oscillation
probabilities can be expressed through just two independent probabilites.


title:
Leptonic CP violation phases using an ansatz for the neutrino mass
  matrix and application to leptogenesis

abstract:
  We further study the previously proposed Ansatz, Tr(M)=0, for a prediagonal
light Majorana type neutrino mass matrix. If CP violation is neglected this
enables one to use the existing data on squared mass differences to estimate
(up to a discrete ambiguity)the neutrino masses themselves. If it is assumed
that only the conventional CP phase is present, the ansatz enables us to
estimate this phase in addition to all three masses. If it is assumed that only
the two Majorana CP phases are present, the Ansatz enables us to obtain a one
parameter family of solutions for the masses and phases. This enables us to
obtain a simple "global" view of lepton number violation effects. Furthermore,
using an SO(10) motivation for the Ansatz suggests an amusing toy (clone) model
in which the heavy neutrinos have the same mixing pattern and mass ratios as
the light ones. In this case only their overall mass scale is not known
(although it is constrained by the initial motivation). Using this toy model we
make a rough estimate of the baryon to photon ratio induced by the leptogenesis
mechanism. Solutions close to the CP conserving cases seem to be favored.


title:
Production of the X(3870) at the Upsilon(4S) by the Coalescence of Charm
  Mesons

abstract:
  If the recently-discovered charmonium state X(3870) is a loosely-bound
molecule of the charm mesons D^0 and \bar D^{*0} or \bar D^0 and D^{*0}, it can
be produced in e^+ e^- annihilation at the \Upsilon(4S) resonance by the
coalescence of charm mesons produced in the decays of B^+ and B^- mesons.
Remarkably, in the case of 2-body decays of the B mesons, the leading
contribution to the coalescence probability depends only on hadron masses and
on the width and branching fractions of the B meson. As the binding energy E_b
of the molecule goes to zero, the coalescence probability scales as E_b^{1/2}
log(E_b). Unfortunately, the coalescence probability is also suppressed by two
powers of the ratio of the width to the mass of the B meson, and is therefore
many orders of magnitude too small to be observed in current experiments at the
B factories.


title: Unstable Relics as a Source of Galactic Positrons

abstract:
  We calculate the fluxes of 511 KeV photons from the Galactic bulge caused by
positrons produced in the decays of relic particles with masses less than 100
MeV. In particular, we tighten the constraints on sterile neutrinos over a
large domain of the mass--mixing angle parameter space, where the resulting
photon flux would significantly exceed the experimental data. At the same time,
the observed photon fluxes can be easily caused by decaying sterile neutrinos
in the mass range 1 MeV < m_sterile < 50 MeV with the cosmological abundance
typically within 10^{-9} < Omega_sterile < 10^{-5}, assuming that Omega_sterile
comes entirely from the conversion of active neutrinos in the early Universe.
Other candidates for decaying relics such as neutral (pseudo)scalar particles
coupled to leptons with the gravitational strength can be compatible with the
photon flux, and can constitute the main component of cold dark matter.


title: Supergravity at Colliders

abstract:
  We consider supersymmetric theories where the gravitino is the lightest
superparticle (LSP). Assuming that the long-lived next-to-lightest
superparticle (NSP) is a charged slepton, we investigate two complementary ways
to prove the existence of supergravity in nature. The first is based on the NSP
lifetime which in supergravity depends only on the Planck scale and the NSP and
gravitino masses. With the gravitino mass inferred from kinematics, the
measurement of the NSP lifetime will test an unequivocal prediction of
supergravity. The second way makes use of the 3-body NSP decay. The angular and
energy distributions and the polarizations of the final state photon and lepton
carry the information on the spin of the gravitino and on its couplings to
matter and radiation.


title: Instantons, diquarks and non-leptonic weak decays of hyperons

abstract:
  This work is devoted to the study of the non-perturbative contributions in
non-leptonic hyperon decays. We show that the instanton-induced 't Hooft
interaction can naturally explain the Delta I=1/2 rule, by generating
quark-diquark clustering inside octet baryons. We compute P-wave and S-wave
amplitudes in the Instanton Liquid Model (ILM), and find good agreement with
experiment. We propose a model-independent procedure to test on the lattice if
the leading quark-quark attraction in the 0^+ anti-triplet channel responsible
for diquark structures in hadrons is originated by the interaction generated by
quasi-classical fields or it is predominantly due to other perturbative and/or
confining forces.


title: Extension of the Buchalla-Safir bound

abstract:
  I provide a simple derivation of the Buchalla-Safir bound on gamma. I
generalize it to the case where an upper bound on the phase of the penguin
pollution is assumed. I apply the Buchalla-Safir bound, and its generalization,
to the recent Belle data on CP violation in B --> pi+ pi-.


title:
The particle emitter size dependence on energy in $e^+ e^-$
  annihilations into hadrons

abstract:
  The nearly energy independent hadron emitter dimension $r$, measured in
$e^+e^-$ annihilation in the energy range 10 to 91 GeV via the Bose-Einstein
correlation of two identical charged pions, is shown to be well accounted for
by choosing the hadron jets as independent pion sources. To this end the known
normalised factorial cumulant moments dependence on particle sources is adapted
to the Bose-Einstein correlation formalism to yield a relation between $r$ and
these sources. This approach is also able to account for the measured $r$
values obtained for the $Z^0$ decays into two and three hadron jets. Finally
the estimated $r$ value of the hadronic $\Upsilon(9.46)$ decay via three gluons
is expected to be higher by about 6 to 11 % over that predicted for its one
photon hadronic decay mode.


title:
Two light sterile neutrinos that mix maximally with each other and
  moderately with three active neutrinos

abstract:
  Since the 3+1 neutrino models with one light sterile neutrino turn out to be
not very effective, at least two light sterile neutrinos may be needed to
reconcile the solar and atmospheric neutrino experiments with the LSND result,
{\it if} this is confirmed by the ongoing MiniBooNE experiment (and when the
CPT invariance is assumed to hold for neutrino oscillations). We present an
attractive 3+2 neutrino model, where two light sterile neutrinos mix maximally
with each other, in analogy to the observed maximal mixing of muon and tauon
active neutrinos. But, while the mixing of $\nu_e$ and
$(\nu_\mu-\nu_\tau)/\sqrt2 $ is observed as large (though not maximal), the
mixing of $\nu_e$ with the corresponding combination of two light sterile
neutrinos is expected to be only moderate because of the reported smallness of
LSND oscillation amplitude. The presented model turns out, however, not to be
{\it more} effective in explaining the hypothetic LSND result than the simplest
3+1 neutrino model. On the other hand, in the considered 3+2 model, the
deviations from conventional oscillations of three active neutrinos appear to
be {\it minimal} within a larger class of 3+2 models.


title: Heavy lepton production at Linac$\otimes$LHC

abstract:
  We investigate the production, signatures and backgrounds of new heavy
leptons via string inspired $E_{6}$ model at the proposed Linac$\otimes$LHC.
Assuming maximal mixing, the production rate is found to be 2000 events per
year for masses up to 3 TeV.


title: Reduction of Multiple Harmonic Sums and Harmonic Polylogarithms

abstract:
  The alternating and non-alternating harmonic sums and other algebraic objects
of the same equivalence class are connected by algebraic relations which are
induced by the product of these quantities and which depend on their index
calss rather than on their value. We show how to find a basis of the associated
algebra. The length of the basis $l$ is found to be $\leq 1/d$, where $d$ is
the depth of the sums considered and is given by the 2nd {\sc Witt} formula. It
can be also determined counting the {\sc Lyndon} words of the respective index
set. The relations derived can be used to simplify results of higher order
calculations in QED and QCD.


title: Higgs Mass from g-2 in Anomaly Mediated Supersymmetry Breaking Models

abstract:
  We estimate the upper bound of the Higgs mass and allowed parameter region in
the anomaly mediated supersymmetry breaking models. There has been a difficulty
that the parameter region cannot be determined precisely in almost SUSY models.
However, we succeed to give strict constraints on the parameters from the
recent results of the precision measurements of the muon g-2 (anomalous
magnetic dipole moment). Especially, the upper bound of the Higgs mass is
obtained as a function of only $\tan{\beta}$, and is estimated less than about
123 (GeV) for all the range of $\tan{\beta}<60$ .


title: Could the next generation of cosmology experiments exclude supergravity?

abstract:
  Gravitinos are expected to be produced in any local supersymmetric model.
Using their abundance prediction as a function of the reheating energy scale,
it is argued that the next generation of Cosmic Microwave Background
experiments could exclude supergravity or strongly favor "thermal-like"
inflation models if B mode polarized radiation were detected. Galactic
cosmic--ray production by evaporating primordial black holes is also
investigated as a way of constraining the Hubble mass at the end of inflation.
Subsequent limits on the gravitino mass and on the related grand unification
parameters are derived.


title:
Higgs Boson Flavor-Changing Neutral Decays into Bottom Quarks in
  Supersymmetry

abstract:
  We analyze the maximum branching ratios for the Flavor Changing Neutral
Current (FCNC) decays of the neutral Higgs bosons of the Minimal Supersymmetric
Standard Model (MSSM) into bottom quarks, h -> b\bar{s} (h=h^0,H^0,A^0). We
consistently correlate these decays with the radiative B-meson decays (b->
s\gamma). A full-fledged combined numerical analysis is performed of these
high-energy and low-energy FCNC decay modes in the MSSM parameter space. Our
calculation shows that the available data on B(b->s \gamma) severely restricts
the allowed values of B(h->b\bar{s}). While the latter could reach a few
percent level in fine-tuned scenarios, the requirement of naturalness reduces
these FCNC rates into the modest range B(h->b\bar{s}) ~ 10^{-4}-10^{-3}. We
find that the bulk of the MSSM contribution to B(h->b\bar{s}) could originate
from the strong supersymmetric sector. The maximum value of the FCNC rates
obtained in this paper disagree significantly with recent (over-)estimates
existing in the literature. Our results are still encouraging because they show
that the FCNC modes h->b\bar{s} can be competitive with other Higgs boson
signatures and could play a helpful complementary role to identify the
supersymmetric Higgs bosons, particularly the lightest CP-even state in the
critical LHC mass region m_{h^0} ~= 90-130 GeV.


title: Final state phases in B -> D\pi, \bar{D}\pi decays and CP-asymmetry

abstract:
  Final state phases \delta_f and \delta_f' in B-> D pi, barD pi decays are
shown to be equal i.e. \delta =\delta_f-\delta_f' = 0. Thus CP-violating
asymmetry A(t) is independent of final state phases. The estimate for the
phases \delta_f and \delta_f' is also given.


title: Pentaquarks in the $\bar{10}_F$- and ${10_F}$-plets

abstract:
  We discuss the mass splittings of the pentaquark $10_F$-, and ${\bar
{10}}_F$-plet due to the quark mass differences, as well as %We discuss the
$10_F$-plet's median mass relative to that of the ${\bar {10}}_F$% -plet of
pentaquarks for both the flavour-spin and the colour-spin hyperfine
interactions, and for both parities of the pentaquark ground states. We show
that the colour-spin interaction leads to degenerate $10_F$- and ${\bar
{10}}_F$-plets when the parity is even, and a median mass splitting of 75 MeV
for odd parity. The flavour-spin interaction leads to $10_{F}-{\bar {10}}_F$
median mass splittings of 200 MeV and 40 MeV, for even and odd parities,
respectively. We display mass relations between $10_F$- and ${\bar
{10}}_F$-plets and analyze the presently known baryon resonances in this light.


title: Waiting for Clear Signals of New Physics in B and K Decays

abstract:
  We classify the extensions of the Standard Model (SM) according to the
structure of local operators in the weak effective Hamiltonian and the presence
or absence of new flavour and CP-violating interactions beyond those
represented by the CKM matrix. In particular we review characteristic
properties of models with minimal flavour violation (MFV), models with
significant contributions from Higgs penguins and models with enhanced Z^0
penguins carrying a large new CP-violating phase. Within the latter models, the
anomalous behaviour of certain B\to\pi K observables implies large departures
from the SM predictions for rare and CP-violating K and B decays. Most
spectacular is the enhancement of Br(K_L->pi^0 nu nubar) by one order of
magnitude and a strong violation of the MFV relation
(\sin2\beta)_{\pi\nu\bar\nu}=(\sin2\beta)_{\psi K_S}. On the other hand our
prediction for (\sin2\beta)_{\phi K_S}\approx 0.9 differs from the Belle result
by the sign but is consistent with the BaBar value. We give a personal shopping
list for the coming years.


title: Shear Viscosity in the O(N) Model

abstract:
  We compute the shear viscosity in the O(N) model at first nontrivial order in
the large N expansion. The calculation is organized using the 1/N expansion of
the 2PI effective action (2PI-1/N expansion) to next-to-leading order, which
leads to an integral equation summing ladder and bubble diagrams. We also
consider the weakly coupled theory for arbitrary N, using the three-loop
expansion of the 2PI effective action. In the limit of weak coupling and
vanishing mass, we find an approximate analytical solution of the integral
equation. For general coupling and mass, the integral equation is solved
numerically using a variational approach. The shear viscosity turns out to be
close to the result obtained in the weak-coupling analysis.


title: Small-x physics beyond the Kovchegov equation

abstract:
  We note the differences between the Kovchegov equation and the
Balitsky-JIMWLK equations as methods of evaluating high energy hard scattering
near the unitarity limit. We attempt to simulate some of the correlations
absent in the Kovchegov equation by introducing two boundaries rather than the
single boundary which effectively approximates the unitarity limit guaranteed
in the Kovchegov equation. We solve the problem of BFKL evolution in the
presence of two boundaries and note that the resulting T-matrix now is the same
in different frames, which was not the case in the single boundary case. The
scaling behavior of the solution to the Kovchegov equation is apparently now
lost.


title: LMA and sterile neutrinos: a case for resonance spin flavour precession?

abstract:
  Open questions remain after the confirmation of LMA as the dominant solution
to the solar neutrino deficit. These are the apparent time modulation of the
solar neutrino event rates in the Homestake, Gallium and SuperKamiokande
experiments, possibly related to solar magnetic activity, the discrepancy
between the event rate in the Homestake experiment and its theoretical
prediction and the absence of the electron spectrum upturn in SuperKamiokande
at energies below 6-8 MeV. We search for a possible understanding of these
questions in the context of resonant spin flavour precession to sterile
neutrinos, assuming a class of magnetic field profiles anchored in the upper
radiation/lower convection zone. We consider the simplest such model beyond the
standard 2$\nu$ flavour LMA one, with one single magnetic moment transition
between active and sterile state and vanishing vacuum mixing. The preferred
mass square difference is $\Delta m^2_{10}=O(10^{-8}eV^2)$. The Ga rate appears
to be the most sensitive of all to solar activity. It is also found that a
field profile extending within a longer region in the radial direction is
favoured over another with a shorter span, and leads to a stronger suppression
than in the LMA case of the intermediate energy neutrinos and some of the $^8
B$ ones.


title:
Detuned Randall-Sundrum model: Radion Stabilization and Supersymmetry
  Breaking

abstract:
  In this talk I describe the low energy effective theory of the
(supersymmetric) Randall-Sundrum scenario with arbitrary brane tensions. The
distance between the branes is stabilized, at the classical level, by a
potential for the radion field. In the supersymmetric case, supersymmetry can
be broken by a VEV for the fifth-component of the graviphoton.


title: The 2 - particle irreducible effective action in gauge theories

abstract:
  The goal of this paper is to develop the formalism of the two-particle
irreducible (2PI) \cite{LW61} (or Cornwall - Jackiw - Tomboulis (CJT) \cite
{CJT}) effective action (EA) in a way appropiate to its application to non
equilibrium gauge theories. We hope this review article will stimulate new work
into this field.


title: New Views on the Problem of CP Violation

abstract:
  After briefly recollecting basic features of the good-old way of detecting CP
violation by comparing nu_{e} and nu_{e}-bar appearance measurement in
long-baseline (LBL) neutrino oscillation experiments, I discuss two new ways of
exploring leptonic CP violation. First, I discuss the reactor-LBL method in
which reactor measurement of theta_{13} is combined with nu_{e} (no nu_{e}-bar)
appearance measurement in LBL.. Assuming \sim 10^{3} GW_{th} ton year operation
of a reactor experiment, CP sensitivity at 90 % CL is shown to exists in
sin^2{2theta_{13}} > 0.03 (0.04) with 2 years running of Hyper-Kamiokande (10
years running of SK). Second, I review the method which I call the BNL
strategy, in which one tries to explore CP violation through observing
oscillatory pattern of neutrino oscillation. Motivated by the approval of the
JPARC neutrino program, I also discuss a low-energy realization of the BNL
strategy. It is meant to measure neutrino oscillation at the first and the
second oscillation maxima by two HKs placed at Kamioka and somewhere in Korea.
It is suggested by very rough argument that 8 years running in nu_{e} and
nu_{e}-bar modes with one HK at Kamioka is equivalent to 2 years running in
nu_{e} mode with two HK complex.


title: Non-abelian dynamics in first-order cosmological phase transitions

abstract:
  Bubble collisions in cosmological phase transitions are explored, taking the
non-abelian character of the gauge fields into account. Both the QCD and
electroweak phase transitions are considered. Numerical solutions of the field
equations in several limits are presented.


title: Mirror matter admixtures in K_L \to \gamma\gamma

abstract:
  Based on possible albeit tiny, admixtures of mirror matter in ordinary mesons
we study the K_L \to \gamma\gamma transition. We find that this process can be
described with a small SU(3) symmetry breaking of only 3%. We also determine
the eta-eta' mixing angle and the pseudoscalar decay constants. The results for
these parameters are consistent with some obtained in the literature. They
favor two recent determinations; one based on two analytical constraints, and
another one based on next-to-leading order power corrections.


title: D-term Inflation and Nonperturbative Kahler Potential of Dilaton

abstract:
  We study the $D$-term inflation scenario with a nonperturbative K\"ahler
potential of the dilaton field. Although the FI term which leads an
inflationary expansion is given by the derivative of the K\"ahler potential
with respect to the dilaton in heterotic string models with anomalous U(1), the
too large magnitude is problematic for a viable $D$-term inflation. In this
paper, we point out that the K\"ahler potential with a nonperturbative term can
reduce the magnitude of FI term to desired values while both the dilaton
stabilization and $D$-term domination in the potential are realized by
nonperturbative superpotential.


title: Lack of trinification in Z_3 orbifolds of the SO(32) heterotic string

abstract:
  We report results relating to the trinification scenario in some explicit
string constructions that contain SU(3)^3 as a gauge symmetry. These models are
obtained from symmetric Z_3 orbifolds of the SO(32) heterotic string with one
discrete Wilson line. We highlight the obstacles that were encountered: the
absence of the usual Higgs sector that would break SU(3)^3 \to SU(3)_c \times
SU(2)_L \times U(1)_Y; the presence of exotics that would generically befoul
gauge coupling unification and lead to fractionally-charged states in the low
energy spectrum.


title: Feynman's Branes and Feynman's Oscillators

abstract:
  Based on Feynman's lifetime efforts on quantum mechanics and relativity, it
is concluded that the basic difference between field theory and string theory
is that field theory is based on running waves while string theory should deal
with standing waves in the Lorentz-covariant regime.
  At the 1970 spring meeting of the American Physical Society held in
Washington, DC, R. P. Feynman stunned the audience by proposing harmonic
oscillators for relativistic bound states, instead of Feynman diagrams. His
talk was later published in the paper of Feynman, Kislinger, and Ravndal [Phys.
Rev. D, Vol. 3, 2706 (1971)]. These authors noted that the hadron mass spectra
can be predicted by the degeneracy of the three-dimensional harmonic
oscillators. In so doing, they started with the Lorentz-invariant differential
equation for the harmonic oscillator, and obtained Lorentz invariant solutions.
However, their solutions are not normalizable in the time-separation variable
and cannot carry probability interpretation. It is pointed out that there are
solutions normalizable in the time-separation variable within the framework of
Wigner's little-group representation of the Poincar\'e group. These solutions
are not invariant but covariant under Lorentz transformations. These solutions
give a covariant bound-state model which gives the quark model and the parton
model as two different limiting cases, in the low- and high-speed limits
respectively.


title: Beyond the MSSM

abstract:
  Specific quasi-realistic superstring constructions often predict the
existence of new TeV-scale physics which may be different in character from
bottom-up motivated constructions. I describe examples of such beyond the MSSM
physics, with special emphasis on heavy Z' gauge bosons and associated exotic
particles. Implications of an extra U(1)' include a viable scienario for
electroweak baryogenesis, a highly non-standard light Higgs sector, and
Z'-mediated contributions to rare B decays.


title: The $D^0 - \bar D^0$ mass difference from a dispersion relation

abstract:
  We study the Standard Model prediction for the mass difference between the
two neutral D meson mass eigenstates, $\Delta m$. We derive a dispersion
relation based on heavy quark effective theory that relates $\Delta m$ to an
integral of the width difference of heavy mesons, $\Delta\Gamma$, over varying
values of the heavy meson mass. Modeling the $m_D$-dependence of certain D
decay partial widths, we investigate the effects of SU(3) breaking from phase
space on the mass difference. We find that $\Delta m$ may be comparable in
magnitude to $\Delta\Gamma$ in the Standard Model.


title: Nonperturbative calculational method in quantum field theory

abstract:
  An approximate procedure for performing nonperturbative calculations in
quantum field theories is presented. The focus will be quantum non-Abelian
gauge theories with the goal of understanding some of the open questions of
these theories such as the confinement phenomenon and glueballs. One aspect of
this nonperturbative method is the breaking down of the non-Abelian gauge group
into smaller pieces. For example $SU(2) \to U(1) + coset$ or $SU(3) \to SU(2) +
coset$. The procedure also uses some aspects of an old method by Heisenberg to
calculate the n-point Green's function of a strongly interacting, non-linear
theory. Using these ideas we will give approximate calculations of the 2 and
4-points Green's function of the theories considered.


title: Improved $\alpha^4$ Term of the Muon Anomalous Magnetic Moment

abstract:
  We have completed the evaluation of all mass-dependent $\alpha^4$ QED
contributions to the muon $g-2$, or $a_\mu$, in two or more different
formulations. Their numerical values have been greatly improved by an extensive
computer calculation. The new value of the dominant $\alpha^4$ term $A_2^{(8)}
(m_\mu / m_e) $ is 132.6823 (72), which supersedes the old value 127.50 (41).
The new value of the three-mass term $A_3^{(8)} (m_\mu / m_e, m_\mu / m_\tau) $
is 0.0376 (1). The term $A_2^{(8)} (m_\mu / m_\tau) $ is crudely estimated to
be about 0.005 and may be ignored for now. The total QED contribution to
$a_\mu$ is $116 584 719.58 (0.02)(1.15)(0.85) \times 10^{-11}$, where 0.02 and
1.15 are uncertainties in the $\alpha^4$ and $\alpha^5$ terms and 0.85 is from
the uncertainty in $\alpha$ measured by atom interferometry. This raises the
Standard Model prediction by $13.9 \times 10^{-11}$, or about 1/5 of the
measurement uncertainty of $a_\mu$. It is within the noise of current
uncertainty ($\sim 100 \times 10^{-11}$) in the estimated hadronic
contributions to $a_\mu$.


title: A new state of matter at high temperature as "sticky molasses"

abstract:
  The main objective of this work is to explore the evolution in the structure
of the quark-antiquark bound states in going down in the chirally restored
phase from the so-called "zero binding points" $T_{zb}$ to the QCD critical
temperature $T_c$ at which the Nambu-Goldstone and Wigner-Weyl modes meet. In
doing this, we adopt the idea recently introduced by Shuryak and Zahed for
charmed $\bar c c$, light-quark $\bar q q$ mesons $\pi, \sigma, \rho, A_1$ and
gluons that at $T_{zb}$, the quark-antiquark scattering length goes through
$\infty$ at which conformal invariance is restored, thereby transforming the
matter into a near perfect fluid behaving hydrodynamically, as found at RHIC.
We name this new state of matter as "sticky molasses". We show that the binding
of these states is accomplished by the combination of (i) the color Coulomb
interaction, (ii) the relativistic effects, and (iii) the interaction induced
by the instanton-anti-instanton molecules. The spin-spin forces turned out to
be small. While near $T_{zb}$ all mesons are large-size nonrelativistic objects
bound by Coulomb attraction, near $T_c$ they get much more tightly bound, with
many-body collective interactions becoming important and making the $\sigma$
and $\pi$ masses approach zero (in the chiral limit). The wave function at the
origin grows strongly with binding, and the near-local four-Fermi interactions
induced by the instanton molecules play an increasingly more important role as
the temperature moves downward toward $T_c$.


title: Gluino Annihilations and Neutralino Dark Matter

abstract:
  We consider supersymmetric scenarios, compatible with all cosmological and
phenomenological requirements, where the lightest SUSY particles (LSPs) are the
neutralino and a quasi degenerate gluino. We study the neutralino relic
abundance, focusing on gluino (co-)annihilation effects. In case the neutralino
is bino-like, in a wide mass window the relic abundance is naturally driven in
the correct range for the LSP to be the main cold dark matter constituent. We
show that the gluino is the strongest possible coannihilating partner of a
bino-like neutralino in the general MSSM. Moreover, contrary to other
coannihilation scenarios, gluino pair annihilations always dominate over
coannihilation processes, even at relatively large gluino-neutralino mass
splittings. Finally, we present prospects for neutralino dark matter detection
in the outlined framework.


title:
About possibility to measure an electric dipole moment (EDM) of nuclei
  in the range $10^{-27} \div 10^{-32}$ $e \cdot cm$ in experiments for search
  of time-reversal violating generation of magnetic and electric fields

abstract:
  The possibility to measure an electric dipole moment (EDM) of nuclei in the
range $10^{-27} \div 10^{-32}$ $e \cdot cm$ in experiments for search of
time-reversal violating generation of magnetic and electric fields is
discussed.


title:
The phenomenon of time-reversal violating generation of static magnetic
  and electric fields is a basis of a new method for measurement of the
  electron EDM and T-odd P-odd constants of electron interaction with a nucleon
  beyond Standard Model

abstract:
  It is shown that in the experiments for search of EDM of an electron (atom,
molecule) the T-odd magnetic moment induced by an electric field and the T-odd
electric dipole moment induced by a magnetic field will be also measured. It is
discussed how to distinguish these contributions.


title:
The running of the electromagnetic coupling alpha in small-angle Bhabha
  scattering

abstract:
  A method to determine the running of alpha from a measurement of small-angle
Bhabha scattering is proposed and worked out. The method is suited to high
statistics experiments at e+e- colliders, which are equipped with luminometers
in the appropriate angular region. A new simulation code predicting small-angle
Bhabha scattering is also presented