title:
Neutrino masses and lepton-number violation in the Littlest Higgs
  scenario

abstract:
  We investigate the sources of neutrino mass generation in Little Higgs
theories, by confining ourselves to the "Littlest Higgs" scenario. Our
conclusion is that the most satisfactory way of incorporating neutrino masses
is to include a lepton-number violating interaction between the scalar triplet
and lepton doublets. The tree-level neutrino masses generated by the vacuum
expectation value of the triplet are found to dominate over contributions from
dimension-five operators so long as no additional large lepton-number violating
physics exists at the cut-off scale of the effective theory. We also calculate
the various decay branching ratios of the charged and neutral scalar triplet
states, in regions of the parameter space consistent with the observed neutrino
masses, hoping to search for signals of lepton-number violating interactions in
collider experiments.


title:
Dynamics of Quark-Gluon-Plasma Instabilities in Discretized Hard-Loop
  Approximation

abstract:
  Non-Abelian plasma instabilities have been proposed as a possible explanation
for fast isotropization of the quark-gluon plasma produced in relativistic
heavy-ion collisions. We study the real-time evolution of these instabilities
in non-Abelian plasmas with a momentum-space anisotropy using a hard-loop
effective theory that is discretized in the velocities of hard particles. We
extend our previous results on the evolution of the most unstable modes, which
are constant in directions transverse to the direction of anisotropy, from
gauge group SU(2) to SU(3). We also present first full 3+1-dimensional
simulation results based on velocity-discretized hard loops. In contrast to the
effectively 1+1-dimensional transversely constant modes we find subexponential
behaviour at late times.


title: Quark-Lepton Complementarity; a Review

abstract:
  It has been recognized recently that there is a remarkable empirical relation
between lepton and quark mixing angles, theta_{12} + theta_C \approx pi/4. If
not accidental, it should testify for yet uncovered new relationship between
the fundamental twin particles in nature which only differ in their ability to
feel color. The nontrivial structure which is presumed to exist behind the
empirical relation is named as ``quark-lepton complementarity''. In this talk,
I review the idea at the kind request of the organizer. Starting from
pedagogical discussions of bimaximal mixing, which likely to be involved in the
whole picture, I try to give a flavor of the new field which is still in rapid
development. Toward the more balanced knowledges of flavor mixing in lepton and
quark sectors, I describe a promising way for precision measurement of
theta_{12} which utilizes solar and reactor neutrinos.


title:
Exclusive diffractive electroproduction of dijets in collinear
  factorization

abstract:
  Exclusive electroproduction of hard dijets can be described within the
collinear factorization. This process has clear experimental signature and
provides one with an interesting alternative venue to test QCD description of
hard diffractive processes and extract information on generalized nucleon
parton distributions. In this work we present detailed leading-order QCD
calculations of the relevant cross sections, including longitudinal momentum
fraction distribution of the dijets and their azimuthal angle dependence.


title: Multi gluon collinear limits from MHV amplitudes

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


title: A Chiral Perturbation Theory Primer

abstract:
  These lecture notes include the following topics. Chapter 1 deals with QCD
and its global symmetries in the chiral limit, explicit symmetry breaking in
terms of the quark masses, and the concept of Green functions and Ward
identities reflecting the underlying chiral symmetry. In Chapter 2 the idea of
a spontaneous breakdown of a global symmetry is discussed and its consequences
in terms of the Goldstone theorem are demonstrated. Chapter 3 deals with
mesonic chiral perturbation theory and the principles entering the construction
of the chiral Lagrangian are outlined. In Chapter 4 the methods are extended to
include the interaction between Goldstone bosons and baryons in the
single-baryon sector.


title: Production of orbitally excited vector mesons in diffractive DIS

abstract:
  Within the k_t-factorization framework, we study diffractive production of
orbitally excited vector mesons and compare it with the production of radial
excitations, focusing on the rho(1450)/rho(1700) case. At small Q^2, orbital
excitation of light quarkonia is found to dominate over radial excitations in
diffractive production. We predict strong suppression of the production of
orbital excitations by longitudinal photons, which leads to very small
sigma_L/sigma_T ratio. At small Q^2, the s-channel helicity violating
transitions contribute \sim 10-15% of the transverse cross section and \sim 50%
of the longitudinal cross section. We also study mixing between radial and
orbital excitations and determine strategies towards clarification of
S-wave/D-wave assignment to rho(1450) and rho(1700) mesons. The results are
compared with the experimental data available, and predictions for future
experiments are given.


title:
Precise mass spectrum of mesons with open charm in the harmonic quarks
  and oscillators

abstract:
  The harmonic quarks and their complete oscillators are presenting the
unprecedented exact solution for the mass spectrum of mesons with an explicit
charm. The experimental and calculated spectrums coincide with standard
deviation in 1.8 MeV. The four doublets and experimental errors of meson masses
give the main contribution in this value. The harmonic spectrum is not
sensitive to an isospin. The spectrum is simple, complete, precise and
logically clear. It's easy to make predictions. The spectrum has not free
parameters. It's supposed that the spectrum of harmonic and mixed levels is an
exterior spectrum of allowed energy states in relation to a QCD states. The
features of the harmonic spectrum, some levels of charm hadrons, the acceptor
property of a c-quark, the mass rank of quarks and the nature of leptons are
discussed.


title: Single spin asymmetries in hadron-hadron collisions

abstract:
  We study weighted azimuthal single spin asymmetries in hadron-hadron
scattering using the diagrammatic approach at leading order and assuming
factorization. The effects of the intrinsic transverse momenta of the partons
are taken into account. We show that the way in which $T$-odd functions, such
as the Sivers function, appear in these processes does not merely involve a
sign flip when compared with semi-inclusive deep inelastic scattering, such as
in the case of the Drell-Yan process. Expressions for the weighted scattering
cross sections in terms of distribution and fragmentation functions folded with
hard cross sections are obtained by introducing modified hard cross sections,
referred to as gluonic pole cross sections.


title:
Generalized parton distributions for the pion in chiral perturbation
  theory

abstract:
  Generalized parton distributions provide a unified parameterization of hadron
structure and allow one to combine information from many different observables.
Lattice QCD calculations already provide important input to determine these
distributions and hold the promise to become even more important in the future.
To this end, a reliable extrapolation of lattice calculations to the physical
quark and pion masses is needed. We present an analysis for the moments of
generalized parton distributions of the pion in one-loop order of chiral
perturbation theory.


title:
The Effect of $D-\bar D$ Mixing on the Measurement of $\gamma$ in $B\to
  D K$ Decays

abstract:
  $D-\bar D$ mixing is the source of the largest theoretical uncertainty in the
extraction of $\gamma$ from $B\to D K$ decays. In the Standard Model, the
mixing can have a rate close to its current experimental upper bound and is
CP-conserving to an excellent approximation. We show that neglecting
CP-conserving $D-\bar D$ mixing leads to an error in the determination of
$\gamma$ only at second order in the small parameters, $\Delta m_D/\Gamma_D$
and $\Delta\Gamma_D/\Gamma_D$, and is therefore very small and can be safely
neglected.


title: Top quark and charged Higgs production at hadron colliders

abstract:
  I present a brief theoretical update on top quark pair production at the
Tevatron and give values of the NNLO-NNNLL cross section for both m_t=175 and
178 GeV. I then present a calculation of the cross section for charged Higgs
production in association with a top quark at the LHC, including NNLO
soft-gluon corrections.


title:
Chromoelectric fields and quarkonium-hadron interactions at high
  energies

abstract:
  We develop a simple model to study the heavy quarkonium-hadron cross section
in the high energy limit. The hadron is represented by an external electric
color field (capacitor) and the heavy quarkonium is represented by a small
color dipole. Using high energy approximations we compute the relevant cross
sections, which are then compared with results obtained with other methods. Our
calculations are presented in a pedagogical way accessible to undergraduate
students.


title: Magnetism and superconductivity in quark matter

abstract:
  Magnetic properties of quark matter and its relation to the microscopic
origin of the magnetic field observed in compact stars are studied. Spontaneous
spin polarization appears in high-density region due to the Fock exchange term,
which may provide a scenario for the behaviors of magnetars. On the other hand,
quark matter becomes unstable to form spin density wave in the moderate density
region, where restoration of chiral symmetry plays an important role.
Coexistence of magnetism and color superconductivity is also discussed.


title: Generalized Z-Scaling for Charged Hadrons and Jets

abstract:
  Generalization of z-scaling observed in the inclusive high-pT charged hadron
and jet production is proposed. The scaling function psi(z) describing both
charged hadrons and jets produced in proton-(anti)proton collisions for various
multiplicity densities and collision energies is constructed. Anomalous fractal
dimensions and parameters characterizing associated medium for both classes of
events are established. The basic features of the scaling established in
minimum bias events are shown to be preserved up to the highest multiplicity
densities measured in experiments UA1, E735, CDF and STAR. The obtained results
are of interest to use z-scaling as a tool for searching for new physics
phenomena of particle production in high transverse momentum and high
multiplicity region at the U70, Tevatron, RHIC and LHC.


title: Duality violations and spectral sum rules

abstract:
  We study the issue of duality violations in the VV-AA vacuum polarization
function in the chiral limit. This is done with the help of a model with an
expansion in inverse powers of the number of colors, Nc, allowing us to
consider resonances with a finite width. Due to these duality violations, the
Operator Product Expansion (OPE) and the moments of the spectral function (e.g.
the Weinberg sum rules) do not match at finite momentum, and we analyze this
difference in detail. We also perform a comparative study of many of the
different methods proposed in the literature for the extraction of the OPE
parameters and find that, when applied to our model, they all fare quite
similarly. In fact, the model strongly suggests that a significant improvement
in precision can only be expected after duality violations are included. To
this end, we propose a method to parameterize these duality violations. The
method works quite well for the model, and we hope that it may also be useful
in future determinations of OPE parameters in QCD.


title:
Four-fermion production at gamma gamma colliders: 2. Radiative
  corrections in double-pole approximation

abstract:
  The O(alpha) electroweak radiative corrections to gamma gamma --> WW --> 4f
within the electroweak Standard Model are calculated in double-pole
approximation (DPA). Virtual corrections are treated in DPA, leading to a
classification into factorizable and non-factorizable contributions, and
real-photonic corrections are based on complete lowest-order matrix elements
for gamma gamma --> 4f + gamma. Soft and collinear singularities appearing in
the virtual and real corrections are combined alternatively in two different
ways, namely by using the dipole subtraction method or by applying phase-space
slicing. The radiative corrections are implemented in a Monte Carlo generator
called COFFERgammagamma, which optionally includes anomalous triple and quartic
gauge-boson couplings in addition and performs a convolution over realistic
spectra of the photon beams. A detailed survey of numerical results comprises
O(alpha) corrections to integrated cross sections as well as to angular,
energy, and invariant-mass distributions. Particular attention is paid to the
issue of collinear-safety in the observables.


title:
Generalized Parton Distributions in the Impact Parameter Space with
  Non-zero Skewedness

abstract:
  We investigate the generalized parton distributions (GPDs) with non-zero
$\xi$ and $\Delta^\perp$ for a relativistic spin-1/2 composite system, namely
for an electron dressed with a photon, in light-front framework by expressing
them in terms of overlaps of light-cone wave functions. The wave function
provides a template for the quark spin-one diquark structure of the valence
light cone wave function of the proton. We verify the inequalities among the
GPDs with different helicities and show the qualitative behaviour of the
fermion and gauge boson GPDs in the impact parameter space.


title: High energy neutrino spin light

abstract:
  The quantum theory of spin light (electromagnetic radiation emitted by a
Dirac massive neutrino propagating in dense matter due to the weak interaction
of a neutrino with background fermions) is developed. In contrast to the
Cherenkov radiation, this effect does not disappear even if the medium
refractive index is assumed to be equal to unity. The formulas for the
transition rate and the total radiation power are obtained. It is found out
that radiation of photons is possible only when the sign of the particle
helicity is opposite to that of the effective potential describing the
interaction of a neutrino (antineutrino) with the background medium. Due to the
radiative self-polarization the radiating particle can change its helicity. As
a result, the active left-handed polarized neutrino (right-handed polarized
antineutrino) converting to the state with inverse helicity can become
practically ``sterile''. Since the sign of the effective potential depends on
the neutrino flavor and the matter structure, the spin light can change a ratio
of active neutrinos of different flavors. In the ultra relativistic approach,
the radiated photons averaged energy is equal to one third of the initial
neutrino energy, and two thirds of the energy are carried out by the final
``sterile'' neutrinos.


title: Jet quenching

abstract:
  High-pt particles produced in nucleus-nucleus collisions constitute a
powerful tool to study the medium properties. The energy loss resulting from
the propagation of these particles in the produced medium translates into a
suppression of the high-pt yields. These effects are usually associated to
medium-induced gluon radiation which, in turn, predicts a broadening of the
jet-like signals. Both the energy loss and the jet broadening are expected to
increase proportionally to the medium density. In the more realistic case of a
dynamically expanding medium, the gluon radiation becomes anisotropic due to
the presence of a preferred direction in the transverse plane with respect to
the axis of propagation. This anisotropy translates into deformed jet-shapes
which provide new posibilities to study these flows by high-pt measurements.


title: Observation potential for \chi_b at the Tevatron and LHC

abstract:
  We confirm the results of previous works that the internal motion of quarks
inside charmonium mesons increases the cross section of the process $e^+e^-\to
$J/\psi\eta_c$. We also show, that this effect increases the widths of the
scalar meson decay into two vector ones and state that the decays
$\chi_{b0,2}\to2J/\psi$ can be used to detect these scalar mesons at Tevatron
and LHC colliders.


title:
Transverse momentum parton distributions inspired by a quark potential
  model

abstract:
  We derive a nonperturbative transverse momentum distribution for partons
using a potential model to describe the quark-quark interaction inside the
proton. We use this distribution to calculate the diferential cross-section of
$\pi^0$-production for intermediate values of transverse momentum in $p-p$
collisions at high energies. Assuming a variable string tension constant for
the quark-quark potential we obtain a very good description of the experimental
data at different energies. The corresponding values of the mean transverse
momentum of the partons are essentially lower than those obtained using a
Gaussian transverse momentum parton distribution.


title: Strangeness and the discovery of quark-gluon plasma

abstract:
  Strangeness flavor yield s and the entropy yield S are the observables of the
deconfined quark-gluon state of matter which can be studied in the entire
available experimental energy range at AGS, SPS, RHIC, and, in near future, at
the LHC energy range. We present here a comprehensive analysis of strange, soft
hadron production as function of energy and reaction volume. We discuss the
physical properties of the final state and argue how evidence about the
primordial QGP emerges.


title: Test of potential homogeneity in the KATRIN gaseous tritium source

abstract:
  83mKr is supposed to be used to study the properties of the windowless
gaseous tritium source of the experiment KATRIN. In this work we deduce the
amount of 83mKr which is necessary to determine possible potential
inhomogeneities via conversion-electron-line broadening.


title: Dynamical CP Violation in the Early Universe and Leptogenesis

abstract:
  In a recent publication, we suggested a mechanism for obtaining dynamical CP
violation in the early Universe based on the out-of-equilibrium evolution of
complex scalar fields. In this paper, we suggest several ways of transferring
the CP asymmetry from the scalar sector to the leptonic sector. In particular,
we point out how a ``transient MNS(P) matrix'' can generate an asymmetry
between fermions and anti-fermions directly.


title:
Transverse momentum distribution of vector mesons produced in
  ultraperipheral relativistic heavy ion collisions

abstract:
  We study the transverse momentum distribution of vector mesons produced in
ultraperipheral relativistic heavy ion collisions (UPCs). In UPCs there is no
strong interaction between the nuclei and the vector mesons are produced in
photon-nucleus collisions where the (quasireal) photon is emitted from the
other nucleus. Exchanging the role of both ions leads to interference effects.
A detailed study of the transverse momentum distribution which is determined by
the transverse momentum of the emitted photon, the production process on the
target and the interference effect is done. We study the total unrestricted
cross section and those, where an additional electromagnetic excitation of one
or both of the ions takes place in addition to the vector meson production, in
the latter case small impact parameters are emphasized.


title: A Dark Matter Candidate with New Strong Interactions

abstract:
  We study the possibility that dark matter is a baryon of a new strongly
interacting gauge theory, which was introduced in the low energy theory of
Cosmological SUSY Breaking (CSB). This particle can fit the observed dark
matter density if an appropriate cosmological asymmetry is generated. The same
mechanism can also explain the dark/baryonic matter ratio in the universe. The
mass of the dark matter particle is in the multiple TeV range, and could be as
high as 20 TeV.


title: Theory Summary of the Electroweak Session for Moriond 2005

abstract:
  I broadly summarize the theoretical contributions in the Electroweak session
of the 2005 Moriond meeting under four rubrics: i) neutrinos; ii) cosmology;
iii) electroweak interactions; and iv) flavor physics.


title:
Effective Potential Study of the Chiral Phase Transition in a QCD-like
  Theory

abstract:
  We construct the effective potential for a QCD-like theory using the
auxiliary field method. The chiral phase transition exhibited by the model at
finite temperature and the quark chemical potential is studied from the
viewpoint of the shape change of the potential near the critical point. We
further generalize the effective potential so as to have quark number and
scalar quark densities as independent variables near the tri-critical point.


title: Long-distance contributions in $ K \to \pi l^+ l^-$ Decays

abstract:
  This talk gives a short summary of some work \cite{FGEdeR04} realized in
collaboration with E. de Rafael and concerning $K\ra\pi \ell^+ \ell^-$ decays,
in a combined framework of Chiral Perturbation Theory and Large--$N\_c$ QCD
under the dominance of a minimal narrow resonance structure.


title: Baryon Antibaryon Nonets

abstract:
  The baryon-antibaryon SU(3) nonets are proposed as a scheme to classify the
increased number of experimentally observed enhancements near the baryon
antibaryon mass threshold. The scheme is similar to the Fermi-Yang-Sakata
model, which was put forth about fifty years ago in explaining the mesons
observed at that time. According to the present scheme, many new
baryon-antibaryon bound states are predicted, and their possible productions in
quarkonium decays and B decays are suggested for experimental search.


title:
An approximate solution for solar and supernova neutrino oscillation in
  matter

abstract:
  By using Laplace transformation we developed an approximate solution to
describe neutrino oscillation probabilities in arbitrary density matter. We
show that this approximation solution is valid when matter potential V satisfy
$V< \Delta m^2/2E$ and $\int VL<1$, where $L$ is the length of the neutrino
oscillation . Thus, the formula is useful for propagation of the solar or
supernova neutrinos with terrestrial matter effect.


title: Full O(alpha) corrections to e+e- -> sf_i sf_j

abstract:
  We present a complete precision analysis of the sfermion pair production
process e+e- -> sf_i sf_j (f = t, b, tau, nu_tau) in the Minimal Supersymmetric
Standard Model. Our results extend the previously calculated weak corrections
by including all one-loop corrections together with higher order QED
corrections. We present the details of the analytical calculation and discuss
the renormalization scheme. The numerical analysis shows the results for total
cross-sections, forward-backward and left-right asymmetries. It is based on the
SPS1a' point from the SPA project. The complete corrections are about 10% and
have to be taken into account in a high precision analysis.


title:
U(1)_Q invariance and SU(3)_C X SU(3)_L X U(1)_X models with beta
  arbitrary

abstract:
  Using the U(1)_Q invariance, the photon eigenstate and matching gauge
coupling constants in SU(3)_C X SU(3)_L X U(1)_X models with beta arbitrary are
given. The mass matrix of neutral gauge bosons is exactly diagonalized, and the
photon eigenstate is independent on the symmetry breaking parameters - VEV's of
Higgs scalars. By obtaining the electromagnetic vertex, the model is embedded
naturally into the standard model.


title: Conformally Sequestered SUSY Breaking in Vector-like Gauge Theories

abstract:
  We provide, in a framework of vector-like gauge theories, concrete models for
conformal sequestering of dynamical supersymmetry (SUSY) breaking in the hidden
sector. If the sequestering is sufficiently strong, anomaly mediation of the
SUSY breaking may give dominant contributions to the mass spectrum of SUSY
standard-model particles, leading to negative slepton masses squared. Thus, we
also consider a model with gravitational gauge mediation to circumvent the
tachyonic slepton problem in pure anomaly mediation models.


title: Precision calculations for gamma gamma --> WW --> 4fermions(+gamma)

abstract:
  The O(alpha) electroweak radiative corrections to gamma gamma --> WW --> 4f
within the electroweak Standard Model are calculated in double-pole
approximation (DPA). Virtual corrections are treated in DPA, and real-photonic
corrections are based on complete lowest-order matrix elements for gamma gamma
--> 4f+gamma. The radiative corrections are implemented in a Monte Carlo
generator called COFFERgammagamma, which optionally includes anomalous triple
and quartic gauge-boson couplings in addition and performs a convolution over
realistic spectra of the photon beams. A brief survey of numerical results
comprises O(alpha) corrections to integrated cross sections as well as to
angular and invariant-mass distributions.


title: Intrinsic CPT violation and decoherence for entangled neutral mesons

abstract:
  We present a combined treatment of quantum-gravity-induced effects and
intrinsic CPT violation in entangled neutral-Kaon states. Our analysis takes
into consideration two types of effects: first, those associated with the loss
of particle-antiparticle identity, as a result of the ill-defined nature of the
CPT operator, and second, effects due to the non-unitary evolution of the Kaons
in the space-time foam. By studying a variety of phi-factory observables,
involving identical as well as general final states, we derive analytical
expressions, to leading order in the associated CPT violating parameters, for
double-decay rates and their time-integrated counterparts. Our analysis shows
that the various types of the aforementioned effects may be disentangled
through judicious combinations of appropriate observables in a phi factory.


title:
PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W
  decays

abstract:
  We present a discussion of the precision for the PHOTOS Monte Carlo
algorithm, with improved implementation of QED interference and multiple-photon
radiation. The main application of PHOTOS is the generation of QED radiative
corrections in decays of any resonances, simulated by a "host" Monte Carlo
generator. By careful comparisons automated with the help of the MC-TESTER tool
specially tailored for that purpose, we found that the precision of the current
version of PHOTOS is of 0.1% in the case of Z and W decays. In the general
case, the precision of PHOTOS was also improved, but this will not be
quantified here.


title: An elementary introduction to the Holographic Principle

abstract:
  In this work we review at an elementary level the origin, main ideas and
present status of the so called holographic principle. This principle, even in
the absence of a precise formulation, is seen by many people as a major clue
for the understanding of the relationship betweeen quantum mechanics and
general relativity. The topics considered here include black hole
thermodynamics, the information paradox, entropy bounds, the covariant
formulation, and a short discussion on the compatibility of the holographic
principle with quantum field theory and modern string theory.


title: MINT - A Simple Model for Low Energy Hadronic Interactions

abstract:
  The bulk of inelastic hadronic interactions is characterized by longitudinal
phase space and exponentially damped transverse momentum spectra. A simple
model with only a single adjustable parameter is presented, making it a very
convenient tool for systematic studies, which gives a surprisingly good
description of pA-collisions at 920 GeV beam energy.


title: General soft terms from Supergravity including D-terms

abstract:
  We derive general expressions for soft terms in supergravity where D-terms
contribute significantly to the supersymmetry breaking. Such D-terms can
produce large splitting between scalar and fermionic partners in the spectrum.
By requiring that supersymmetry breaking sets the cosmological constant to
zero, we then parameterize the soft terms when D-terms dominate over F-terms or
are comparable to them. We present an application of our results to the split
supersymmetry scenario and briefly address the issue of moduli stabilisation.


title: Chiral Soliton Model Predictions for Pentaquarks

abstract:
  We briefly describe chiral soliton model description of baryons and
predictions for exotic antidecuplet. We discuss successful phenomenology which
triggered experimental searches and problems which arise in the formal limit of
large Nc.


title: New evidence for the saturation of the Froissart bound

abstract:
  Fits to high energy data alone cannot cleanly discriminate between asymptotic
$\ln s$ and $\ln^2s$ behavior of total hadronic cross sections. We demonstrate
that this is no longer true when we require that these amplitudes also
describe, on average, low energy data dominated by resonances.


title: Kaon Eletromagnetic Form Factor in the Light-Front Formalism

abstract:
  Numerical calculations are performed and compared to the experimental data
for the electromagnetic form factor of the kaon, which is extracted from both
components of the electromagnetic current, $J^{+}$ and $J^{-}$, with a
pseudo-scalar coupling of the quarks to the kaon. In the case of $J^{+}$ there
is no pair term contribution in the Drell-Yan frame ($q^{+}=0$). However, for
$J^{-}$, the pair term contribution is different from zero and necessary in
order to preserve the rotational symmetry of the current. The free parameters
are the quark masses and the regulator mass.


title:
Electron generation of leptons and hadrons with reciprocal
  alpha-quantized lifetimes and masses

abstract:
  Hadron elementary particle measurements have long revealed an
alpha-dependence in the long-lived threshold-state lifetimes, together with an
alpha-related mass structure, where alpha ~ 1/137 is the fine structure
constant. A detailed lifetime analysis shows that of the 156 particles with
well-determined lifetimes, the 120 shortest lifetimes have a continuum of
values, but the 36 longer lifetimes occur in alpha-spaced groups which are
sorted into s, c, b quark flavors. Guided by these lifetime results, we deduce
an alpha-generated set of universal mass quanta, based on the electron ground
state, which apply to both leptons and hadrons. A low-mass "threshold-state
octet" of particles - muon, proton, tau, pion, eta, eta prime, kaon, phi meson
- is reproduced to an average mass accuracy of 0.4%, with no adjustable
parameters except a small hadronic binding energy. Without the lepton states,
the hadron mass pattern is difficult to ascertain.


title:
5-dimensional Quantum Gravity Effects in Exclusive Double Diffractive
  Events

abstract:
  The experimentally measurable effects related to extra dimensional gravity in
a RS-type brane world are estimated. Two options of the RS framework (namely,
with small and large curvature) are considered. It is shown that both can be
detected by the joint experiment of the CMS and TOTEM Collaborations at the
LHC.


title:
Ground state mass spectrum for scalar diquarks with Bethe-Salpeter
  equation

abstract:
  In this article, we study the structures of the pseudoscalar mesons $\pi$,
$K$ and the scalar diquarks $U^a$, $D^a$, $S^a$ in the framework of the coupled
rainbow Schwinger-Dyson equation and ladder
  Bethe-Salpeter equation with the confining effective potential.
  The $u$, $d$, $s$ quarks have small current masses, and the renormalization
is very large, the mass poles in the timelike region are absent which
implements confinement naturally. The Bethe-Salpeter wavefunctions of the
pseudoscalar mesons $\pi$, $K$ and the scalar diquarks $U^a$, $D^a$, $S^a$ have
the same type (Gaussian type) momentum dependence, center around zero momentum
and extend to the energy scale about $q^2=1GeV^2$ which happen to be the energy
scale for the chiral symmetry breaking, the strong interactions in the infrared
region result in bound (or quasi-bound) states. The numerical results for the
masses and decay constants of the $\pi$, $K$ mesons can reproduce the
experimental values, the ground state masses of the scalar diquarks $U^a$,
$D^a$, $S^a$ are consistent with the existing theoretical calculations. We
suggest a new Lagrangian which may explain the uncertainty of the masses of the
scalar diquarks .


title: Hiding the Existence of a Family Symmetry in the Standard Model

abstract:
  If a family symmetry exists for the quarks and leptons, the Higgs sector is
expected to be enlarged to be able to support the transformation properties of
this symmetry. There are however three possible generic ways (at tree level) of
hiding this symmetry in the context of the Standard Model with just one Higgs
doublet. All three mechanisms have their natural realizations in the
unification symmetry E_6 and one in SO(10). An interesting example based on
SO(10) X A_4 for the neutrino mass matrix is discussed.


title: A "Known" CP Asymmetry in $\tau$ Decays

abstract:
  We point out that dynamics known from the observed CP violation in $K_L\to
\pi^{\mp}l^{\pm}\nu$ generate a CP asymmetry of $3.3\cdot 10^{-3}$ in
$\tau^{\pm} \to \nu K_L\pi^{\pm}$. CPT invariance requires the same asymmetry
in the more approachable transitions $\tau^{\pm} \to \nu K_S\pi^{\pm}$. While
little new can be learnt from this fact, it has to be accounted for, since CP
asymmetries in $\tau \to \nu K\pi$ channels are prime candidates for revealing
the intervention of New Physics. This `known' CP asymmetry provides a very
useful calibration point in such searches. It also provides a test of CPT
symmetry (as well as the $\Delta Q = \Delta S$ selection rule).


title:
On the scaling properties of the total $\gamma^*\mathrm{p}$ cross
  section

abstract:
  We perform a detailed analysis on the scaling properties of the total
$\gamma^*\mathrm{p}$ cross section, $\sigma_{\gamma^*\mathrm{p}}$. We write the
cross section as a product of two functions $W$ and $V$ representing,
respectively, the dynamical degrees of freedom and the contribution from the
valence partons. Analyzing data from HERA and fixed target experiments we find
that $V$ is nearly independent of $Q^2$ and concentrated at large $x$, while
$W$ carries all the information on the $Q^2$ evolution of $\gamma^*\mathrm{p}$.
We define the reduced cross section $\tilde{\sigma}_{\gamma^*\mathrm{p}} \equiv
W=\sigma_{\gamma^*\mathrm{p}}/V$, and show that it is very close to a
generalized homogeneous function. This property gives rise to geometric scaling
not only for small $x$, but for all the current measured kinematic plane. As a
consequence of our {\em Ansatz} we also obtain a compact parameterization of
$\sigma_{\gamma^*\mathrm{p}}$ describing all data above $Q^2=1$ GeV$^2$.


title: Coherent power corrections to structure functions

abstract:
  We calculate and resum a perturbative expansion of nuclear enhanced power
corrections to the structure functions measured in deeply inelastic scattering
of leptons on a nuclear target. Our results for the Bjorken x-, Q**2- and
A-dependence of nuclear shadowing in F2(x,Q**2;A) and the nuclear modifications
to FL(x,Q**2;A), obtained in terms of the QCD factorization approach, are
consistent with the existing data. We predict the dynamical shadowing from
final state interactions in neutrino-nucleus reactions for sea and valence
quarks in the structure functions F2(x,Q**2;A) and xF3(x,Q**2;A), respectively.
In p+A collisions we calculate the centrality and rapidity dependent nuclear
suppression of single and double inclusive hadron production at moderate
transverse momenta.


title:
Annihilation in Factorization-suppressed B Decays Involving a 1^1P_1
  Meson and Search for New-Physics Signals

abstract:
  The recent measurements of large transverse fractions in B \to \phi K^*
decays represent a challenge for theory. It was shown that the QCD penguin
annihilation could contribute to the transverse amplitudes such that the
observation could be accounted for in the Standard Model. However, if one
resorts to new physics for resolutions, then the relevant 4-quark operators
should be tensor-like or scalar-like. We show that the same annihilation
effects could remarkably enhance the longitudinal rates of
factorization-suppressed B\to h_1(1380) K^*, b_1(1235) K^* modes to be
(12.0^{+4.1}_{-3.0})\times 10^{-6} and (7.0\pm 3.5)\times 10^{-6},
respectively, but attend to be cancelled in the transverse components.
Nevertheless, the transverse fractions of B\to h_1(1380) K^* can become sizable
due to new-physics contributions. The measurements of these decays can thus
help us to realize the role of annihilation topologies in charmless B decays
and offer a theoretically clean window to search for the evidence of new
physics.


title: Successes and Problems of Chiral Soliton Approach to Exotic Baryons

abstract:
  We briefly review the formulation of chiral quark soliton model and explain
the difference and similarities with the Skyrme model. Next, we apply the model
to calculate non-exotic and exotic mass spectra. We concentrate on large
$N_{c}$ counting both for mass splittings and decay widths. It is shown that
pure large $N_{c}$ arguments do not explain the small width of exotic
pentaquark states.


title:
Electroweak Precision Constraints on the Littlest Higgs Model with T
  Parity

abstract:
  We compute the leading corrections to the properties of W and Z bosons
induced at the one-loop level in the SU(5)/SO(5) Littlest Higgs model with T
parity, and perform a global fit to precision electroweak data to determine the
constraints on the model parameters. We find that a large part of the model
parameter space is consistent with data. Values of the symmetry breaking scale
as low as 500 GeV are allowed, indicating that no significant fine tuning in
the Higgs potential is required. We identify a region within the allowed
parameter space in which the lightest T-odd particle, the partner of the
hypercharge gauge boson, has the correct relic abundance to play the role of
dark matter. In addition, we find that a consistent fit to data can be obtained
for large values of the Higgs mass, up to 800 GeV, due to the possibility of a
partial cancellation between the contributions to the T parameter from Higgs
loops and new physics.


title: Dihedral Flavor Symmetry from Dimensional Deconstruction

abstract:
  Extra dimension deconstructed on a closed chain has naturally the symmetry of
a regular polygon, the dihedral symmetry D_N. We assume that the fields are
irreducible representations of the binary dihedral group Q_2N, which is the
covering group of D_N. It is found that although the orbifold boundary
conditions break the dihedral invariance explicitly, the Q_2N symmetry appears
as an intact internal, global flavor symmetry at low energies. A concrete
predictive model based on Q_6N$ with an odd N is given.


title: Prompt photon photoproduction at HERA in the k_T-factorization approach

abstract:
  We present calculations of the prompt photon photoproduction at HERA collider
in the k_T-factorization approach. Both direct and resolved contributions are
taken into account. The conservative error analisys is performed. The
unintegrated parton densities in a proton and in a photon are determined using
the Kimber-Martin-Ryskin prescription. We investigate both inclusive and
associated with jet prompt photon photoproduction rates. In particular, we
study the angular correlations between produced photon and hadronic jet in the
transverse momentum plane which can provide a unique information about
non-collinear evolution dynamics. We compare our theoretical predictions with
recent experimental data taken by the H1 and ZEUS collaborations.


title: Moduli evolution in the presence of flux compactifications

abstract:
  We study the cosmological evolution of the volume moduli in a class of
recently proposed Inflationary Universe models arising out of Type IIB string
theory, where a number of the moduli fields have been stabilised through flux
compactifications. Developing an approach initially introduced in [3] we show,
in agreement with [4], how the presence of extra sources of matter act so as to
provide additional friction, slowing the modulus field as it evolves down its
potential, thereby vastly increasing the region of parameter space which leads
to the eventual stabilisation of these fields. Extending the case to include
both the real and imaginary parts of the volume modulus, we show how the
parameter space of inital conditions is modified and comment on the impact for
these inflationary models arising out of flux type compactifications.


title: Shape of the $f_0(980)$ in $\gamma\gamma\to\pi^+\pi^-$

abstract:
  The Belle Collaboration results on the observation of the $f_0(980)$
resonance in the reaction $\gamma\gamma\to\pi^+\pi^-$ are analyzed. It is
argued that they point to the presence of mechanisms which give rise to a
strong distortion of the $f_0(980)$ resonance shape in comparison with the
shape of a solitary Breit-Wigner resonance. It is shown that the main factors
responsible for the formation of the specific, steplike, shape of the
$f_0(980)$ resonance in the $\gamma\gamma\to\pi^+\pi^-$ reaction cross section
are the $K^+K^-$ loop mechanism of the $f_0(980)$ coupling to the
$\gamma\gamma$ system and the destructive interference between the background
and $f_0(980)$ resonance contributions in the $\pi^+\pi^-$ invariant mass
region below the $K^+K^-$ threshold.


title:
Off-Shell Scattering Amplitudes for WW Scattering and the Role of the
  Photon Pole

abstract:
  We derive analytic expressions for high energy $2 \to 2$ off-shell scattering
amplitudes of weak vector bosons. They are obtained from six fermion final
states in processes of the type $e^+ e^- \to \bar\nu_e + (WW) + \nu_e \to
\bar\nu_e + (l\nu)(l\nu) + \nu_e$. As an application we reconsider the
unitarity bounds on the Higgs mass. Particular attention is given to the role
of the photon exchange which has not been considered in earlier investigations;
we find that the photon weakens the bound of the Higgs mass.


title:
Semileptonic $B\to \pi$ Decays from an Omn\`es Improved Nonrelativistic
  Constituent Quark Model

abstract:
  The semileptonic $B\to \pi l^+ \nu_l$ decay is studied starting from a simple
quark model which includes the influence of the $B^*$ pole.
  To extend the predictions of a nonrelativistic constituent quark model from
its region of applicability near $q^2_{\rm max}=(m_B-m_\pi)^2$ to all $q^2$
values accessible in the physical decay, we use a novel multiply-subtracted
Omn\`es dispersion relation, which considerably diminishes the form factor
dependence on the elastic $\pi B \to \pi B$ scattering amplitudes at high
energies. By comparison to the experimental branching fraction we extract
$|V_{ub}| = 0.0034 \pm 0.0003 ({\rm exp}) \pm 0.0007 ({\rm theory})$. To
further test our framework, we also study $D\to \pi$ and $D\to K$ decays and
find excellent results $\frac{f^+_\pi(0)}{f^+_K(0)} = 0.80 \pm 0.03, \quad
\frac{{\cal B}(D^0\to \pi^- e^+ \nu_e)}{{\cal B}(D^0\to K^- e^+ \nu_e)}= 0.079
\pm 0.008$. In particular for the $D\to \pi$ case, we reproduce, with high
accuracy, the three-flavor lattice QCD results recently obtained by the
Fermilab-MILC-HPQCD Collaboration. While for the $D\to K$ case, we successfully
describe the data for $f^+(q^2)/f^+(0)$ recently measured by the FOCUS
Collaboration.


title:
RHIC-tested predictions for low-$p_T$ and high-$p_T$ hadron spectra in
  nearly central Pb+Pb collisions at the LHC

abstract:
  We study the hadron spectra in nearly central $A$+$A$ collisions at RHIC and
LHC in a broad transverse momentum range. We cover the low-$p_T$ spectra using
longitudinally boost-invariant hydrodynamics with initial energy and net-baryon
number densities from the perturbative QCD (pQCD)+saturation model. Build-up of
the transverse flow and sensitivity of the spectra to a single decoupling
temperature $\Tdec$ are studied. Comparison with RHIC data at $\ssNN=130$ and
200 GeV suggests a rather high value $\Tdec=150$ MeV. The high-$p_T$ spectra
are computed using factorized pQCD cross sections, nuclear parton
distributions, fragmentation functions, and describing partonic energy loss in
the quark-gluon plasma by quenching weights. Overall normalization is fixed on
the basis of p+$\bar{\rm p}$(p) data and the strength of energy loss is
determined from RHIC Au+Au data. Uncertainties are discussed. With constraints
from RHIC data, we predict the $p_T$ spectra of hadrons in 5 % most central
Pb+Pb collisions at the LHC energy $\ssNN=5500$ GeV. Due to the closed
framework for primary production, we can also predict the net-baryon number at
midrapidity, as well as the strength of partonic energy losses at the LHC. Both
at the LHC and RHIC, we recognize a rather narrow crossover region in the $p_T$
spectra, where the hydrodynamic and pQCD fragmentation components become of
equal size. We argue that in this crossover region the two contributions are to
a good approximation mutually independent. In particular, our results suggest a
wider $p_T$-region of applicability for hydrodynamical models at the LHC than
at RHIC.


title:
Thermodynamics with density and temperature dependent particle masses
  and properties of bulk strange quark matter and strangelets

abstract:
  Thermodynamic formulas for investigating systems with density and/or
temperature dependent particle masses are generally derived from the
fundamental derivation equality of thermodynamics. Various problems in the
previous treatments are discussed and modified. Properties of strange quark
matter in bulk and strangelets at both zero and finite temperature are then
calculated based on the new thermodynamic formulas with a new quark mass
scaling, which indicates that low mass strangelets near beta equilibrium are
multi-quark states with an anti-strange quark, such as the pentaquark
(u^2d^2\bar{s}) for baryon nmber 1 and the octaquark (u^4d^3\bar{s}) for
dibaryon etc.


title: Charm meson resonances and D to V semileptonic form factors

abstract:
  Using limits of large energy effective theory and heavy quark effective
theory we propose a simple parametrization of the heavy to light H to V
semileptonic form factors. Then we reconsider D to V l nu_l decays within a
model which combines heavy meson and chiral symmetry. In our Lagrangians we
include contributions coming from excited charm meson states, some of them
recently observed. Within this framework we determine all parameters describing
the shapes of the form factors and calculate branching ratios and helicity
ratios for all D to V l nu_l decays.


title: A Stringy Solution to the FCNC Problem

abstract:
  The solution to the supersymmetric FCNC problem may not have a simple field
theory interpretation. Here I advocate a possibility based on string selection
rules. The requirement of non--trivial Yukawa structures restricts the form of
the soft terms such that the FCNC problem often does not arise.


title: Solving coupled Dyson--Schwinger equations on a compact manifold

abstract:
  We present results for the gluon and ghost propagators in SU(N) Yang--Mills
theory on a four-torus at zero and nonzero temperatures from a truncated set of
Dyson-Schwinger equations. When compared to continuum solutions at zero
temperature sizeable modifications due to the finite volume of the manifold,
especially in the infrared, are found. Effects due to non-vanishing
temperatures T, on the other hand, are minute for T < 250 MeV.


title: Overview of the SME: Implications and Phenomenology of Lorentz Violation

abstract:
  The Standard Model Extension (SME) provides the most general
observer-independent field theoretical framework for investigations of Lorentz
violation. The SME lagrangian by definition contains all Lorentz-violating
interaction terms that can be written as observer scalars and that involve
particle fields in the Standard Model and gravitational fields in a generalized
theory of gravity. This includes all possible terms that could arise from a
process of spontaneous Lorentz violation in the context of a more fundamental
theory, as well as terms that explicitly break Lorentz symmetry. An overview of
the SME is presented, including its motivations and construction. Some of the
theoretical issues arising in the case of spontaneous Lorentz violation are
discussed, including the question of what happens to the Nambu-Goldstone modes
when Lorentz symmetry is spontaneously violated and whether a Higgs mechanism
can occur. A minimal version of the SME in flat Minkowski spacetime that
maintains gauge invariance and power-counting renormalizability is used to
search for leading-order signals of Lorentz violation. Recent Lorentz tests in
QED systems are examined, including experiments with photons, particle and
atomic experiments, proposed experiments in space and experiments with a
spin-polarized torsion pendulum.


title:
The electromagnetic dipole operator effect on B -> Xs gamma at
  O(alpha_s^2)

abstract:
  The flavor-changing electromagnetic dipole operator O_7 gives the dominant
contribution to the B -> Xs gamma decay rate. We calculate two-loop QCD
corrections to its matrix element together with the corresponding
bremsstrahlung contributions. The optical theorem is applied, and the relevant
imaginary parts of three-loop diagrams are computed following the lines of our
recent t -> Xb W calculation. The complete result allows us to test the
validity of the naive non-abelianization (NNA) approximation that has been
previously applied to estimate the NNLO QCD correction to Gamma(B -> Xs
gamma)/Gamma(B -> Xu e nu). When both decay widths are normalized to m^5_{b,R}
in the same renormalization scheme R, the calculated O(alpha_s^2) correction is
sizeable (~ 6%), and the NNA estimate is about 1/3 too large. On the other
hand, when the ratio of the decay widths is written as
S*(m_b(m_b)/m_{b,pole})^2, the calculated O(alpha_s^2) correction to S is at
the level of 1% for both the complete and the NNA results.


title: Lorentz Violation in Extra Dimensions

abstract:
  In theories with extra dimensions it is well known that the Lorentz
invariance of the $D=4+n$-dimensional spacetime is lost due to the compactified
nature of the $n$ dimensions leaving invariance only in 4d. In such theories
other sources of Lorentz violation may exist associated with the physics that
initiated the compactification process at high scales. Here we consider the
possibility of capturing some of this physics by analyzing the higher
dimensional analog of the model of Colladay and Kostelecky. In that scenario a
complete set of Lorentz violating operators arising from spontaneous Lorentz
violation, that are not obviously Planck-scale suppressed, are added to the
Standard Model action. Here we consider the influence of the analogous set of
operators which break Lorentz invariance in 5d within the Universal Extra
Dimensions picture. We show that such operators can greatly alter the
anticipated Kaluza-Klein(KK) spectra, induce electroweak symmetry breaking at a
scale related to the inverse compactification radius, yield sources of parity
violation in, e.g., 4d QED/QCD and result in significant violations of
KK-parity conservation produced by fermion Yukawa couplings, thus destabilizing
the lightest KK particle. LV in 6d is briefly discussed.


title:
Five-dimensional Yang-Mills-Einstein supergravity on orbifolds: Parity
  assignments

abstract:
  We discuss the options for parity assignments in (on-shell) N=2
five-dimensional Yang-Mills-Einstein supergravity theories (YMESGTs) coupled to
tensor and hypermultiplets on the orbifold spacetime M_4 X S^1/Z_2. Along the
lines of orbifold-GUTs, we allow for general breaking of the five-dimensional
gauge group at the orbifold fixed points. We then extend the discussion to the
case where the orbifold is S^1/(Z_2xZ_2). We do not presume the existence of
fields with support only at fixed points. As in the familiar case of (rigid)
super-Yang-Mills theories on such orbifolds, only bulk hypermultiplets can lead
to chiral multiplets in complex representations of the gauge group on the
boundaries. Massless chiral multiplets coming from bulk vector or tensor
multiplets can potentially be used as Higgs supermultiplets, though a
"doublet-triplet" splitting via parity assignments is not available for the
tensor sector. We also find parity assignments for objects other than fields
that appear in the Lagrangian, which will partially determine the structure of
interactions of the boundary theories. Assigning odd parities to the scalar
sector of vector/tensor multiplets requires the four-dimensional boundary
moduli spaces to lie on the boundary of the classical Kaehler cone, which
corresponds to collapsed Calabi-Yau 2-cycles at the orbifold fixed points in a
compactification of eleven-dimensional supergravity. There is an ambiguity in
how to effect odd parity for the field-independent C_(IJK) tensor of the 5D
theory, which may admit a classical interpretation as Calabi-Yau 4-cycles
collapsing to either 2- or 0-cycles.


title: Axial and tensor charge of the nucleon in the Dirac orbital model

abstract:
  Using the expansion of the baryon wave function in a series of products of
single quark bispinors (Dirac orbitals), the nonsinglet axial and tensor charge
of the nucleon are calculated. The leading term yields ${G_A}/{G_V} = 1.27$ and
in good agreement with experiment. Calculation is essentially parameter-free
and depends on the string tension $\sigma$ and $\alpha_s$, fixed at standard
values. The importance of lower Dirac bispinor component, yielding 18% to the
wave function normalization is stressed.


title:
The influence of strength of hyperon-hyperon interactions on neutron
  star properties

abstract:
  An equation of state of neutron star matter with strange baryons has been
obtained. The effects of the strength of hyperon-hyperon interactions on the
equations of state constructed for the chosen parameter sets have been
analyzed. Numerous neutron star models show that the appearance of hyperons is
connected with the increasing density in neutron star interiors. The performed
calculations have indicated that the change of the hyperon-hyperon coupling
constants affects the chemical composition of a neutron star. The obtained
numerical hyperon star models exclude large population of strange baryons in
the star interior.


title:
The $g$ factor of an electron or muon bound by an arbitrary central
  potential

abstract:
  We consider the $g$ factor of a spin-1/2 particle (electron or muon) bound by
an arbitrary central field. We present an approach which allows one to express
the relativistic $g$ factor in terms of the binding energy. We derive the
general expression for the correction to the $g$ factor caused by a deviation
of the central potential from the Coulomb one. As the application of this
method, we consider the corrections to the $g$ factor due to the finite nuclear
size, including vacuum polarization radiative correction. The effect of the
anomalous magnetic moment is also taken into account.


title:
Dark Matter and Collider Phenomenology with two light Supersymmetric
  Higgs Bosons

abstract:
  Recently, it has been pointed out that two different excesses of events
observed at LEP could be interpreted as the CP-even Higgs bosons of the MSSM
with masses of approximately 98 and 114 GeV. If this is the case, the entire
MSSM Higgs sector is required to be light. In this article, we explore such a
scenario in detail. We constrain the Higgs and supersymmetric spectrum using
$B$ physics constraints as well as the magnetic moment of the muon. We then
point out the implications for neutralino dark matter -- next generation direct
detection experiments will be sensitive to all MSSM models with such a Higgs
sector. Finally, we find that all models outside of a very narrow corridor of
the parameter space have a charged Higgs boson which will be observed at the
LHC. In those exceptional models which do not contain an observable charged
Higgs, a light top squark will always be seen at the LHC, and likely at the
Tevatron.


title: New Method of Enhancing Lepton Number Nonconservation

abstract:
  The lepton number nonconserving (LENNON) conversion of type $ e^- \to e^+$ in
heavy atoms, when irradiated by intense laser beam, is considered to determine
the Majorana nature and precise values of neutrino masses. When the photon
energy is fine tuned, the LENNON process is greatly enhanced by both the
resonance effect and a large occupancy of photons. The signal of this process
would be a positron of definite energy, and a further nuclear $\gamma$-ray in a
favorable case of transition to an excited nuclear level. By constructing a
united target-detector system, it is possible to explore $O[1meV]$ range of the
neutrino mass parameter with a good positron energy resolution.


title: A Little Higgs model of neutrino masses

abstract:
  Little Higgs models are formulated as effective theories with a cut-off of up
to 100 times the electroweak scale. Neutrino masses are then a puzzle, since
the usual see-saw mechanism involves a much higher scale that would introduce
quadratic corrections to the Higgs mass parameter. We propose a model that can
naturally accommodate the observed neutrino masses and mixings in Little Higgs
scenarios. Our framework does not involve any large scale or suppressed Yukawa
couplings, and it implies the presence of three extra (Dirac) neutrinos at the
TeV scale. The masses of the light neutrinos are induced radiatively, they are
proportional to small (\approx keV) mass parameters that break lepton number
and are suppressed by the Little Higgs cut-off.


title:
Oscillations of high energy neutrinos in matter: Precise formalism and
  parametric resonance

abstract:
  We present a formalism for precise description of oscillation phenomena in
matter at high energies or high densities, V > \Delta m^2/2E, where V is the
matter-induced potential of neutrinos. The accuracy of the approximation is
determined by the quantity \sin^2 2\theta_m \Delta V/2\pi V, where \theta_m is
the mixing angle in matter and \Delta V is a typical change of the potential
over the oscillation length (l \sim 2\pi/V). We derive simple and physically
transparent formulas for the oscillation probabilities, which are valid for
arbitrary matter density profiles. They can be applied to oscillations of high
energy (E > 10 GeV) accelerator, atmospheric and cosmic neutrinos in the matter
of the Earth, substantially simplifying numerical calculations and providing an
insight into the physics of neutrino oscillations in matter. The effect of
parametric enhancement of the oscillations of high energy neutrinos is
considered. Future high statistics experiments can provide an unambiguous
evidence for this effect.


title:
Effective Field Theory Lagrangians for Baryons with Two and Three Heavy
  Quarks

abstract:
  By analogy with pNRQCD, we construct Effective Field Theories suitable to
describe the heavy-quark sector of baryons made of two and three heavy quarks.
A long-standing discrepancy between the hyperfine splitting of doubly heavy
baryons obtained in the HQET and potential models is solved. The one-loop
matching of the 4-quark operators of dimension 6 is provided.


title: Gluons at finite temperature in Landau gauge Yang--Mills theory

abstract:
  The infrared behavior of Yang-Mills theory at finite temperature provides
access to the role of confinement. In this review recent results on this topic
from lattice calculations and especially Dyson-Schwinger studies are discussed.
These indicate persistence of a residual confinement even in the
high-temperature phase. The confinement mechanism is very similar to the one in
the vacuum for the chromomagnetic sector. In the chromoelectric sector
screening occurs at the soft scale g^2T, although not leading to a perturbative
behavior.


title: The Decay Sigma^+ -> p l^+ l^- within the Standard Model

abstract:
  The HyperCP collaboration has recently reported the observation of three
events for the decay Sigma^+ -> p mu^+ mu^-. They have suggested that new
physics may be required to understand the implied decay rate and the observed
M_{mumu} distribution. Motivated by this result, we re-examine this mode within
the standard model, considering both the short-distance and long-distance
contributions. The long-distance part depends on four complex form-factors. We
determine their imaginary parts from unitarity, fix two of the real parts from
the Sigma^+ -> p gamma measurements, and estimate the other two with
vector-meson-dominance models. Taking into account constraints from Sigma^+ ->
p e^+ e^-, we find that Sigma^+ -> p mu^+ mu^- is long-distance dominated and
its rate falls within the range suggested by the HyperCP measurement.


title:
Effect of Isospin Chemical Potential on Chiral Condensates and Neutral
  Pseudoscalar Meson Mixing at Finite Temperature and Baryon Chemical Potential

abstract: This paper has been withdrawn by the author since it is too simple and naive.


title: QCD Theory at the XL Rencontre de Moriond: Fish Eyes and Physics

abstract:
  I review a selection of the talks at the QCD Session of the XL Rencontre de
Moriond, talks either by theorists or else of special theoretical interest. I
use the talks to provide some assessment of where we stand with respect to the
problems and opportunities facing QCD theory.


title:
Lepton flavor violating signals of the neutral top-pion in future lepton
  colliders

abstract:
  The presence of the top-pions $\pi_{t}^{0,\pm}$ in the low-energy spectrum is
an inevitable feature of the topcolor scenario. Taking into account the
constraints of the present experimental limit of the lepton flavor
violating($LFV$) process $\mu\to e\gamma$ on the free parameters of
topcolor-assisted techicolor(TC2) models, we study the contributions of the
neutral top-pion $\pi^{0}_{t}$ to the $LFV$ processes $\mu^{+}\mu^{-}\to\tau
\mu$ (or $\tau e$), $ \gamma \gamma\to\tau \mu$ (or $\tau e$), $e^{+}
e^{-}\to\tau \mu $, and $e \gamma\to e \pi_{t}^{0}\to e \tau \mu(e)$ via the
flavor changing ($FC$) couplings $\pi_{t}^{0}l_{i}l_{j}$ and discuss the
possibility of searching for the $LFV$ signals via these processes in future
lepton colliders.


title:
Photon-propagation model with random background field: Length scales and
  Cherenkov limits

abstract:
  We present improved experimental bounds on typical length scales of a
photon-propagation model with a frozen (time-independent) random background
field, which could result from anomalous effects of a static, multiply
connected spacetime foam.


title:
Possible Prescription to Avoid Chromomagnetic Instability in the g2SC
  and gCFL Phases

abstract: This paper has been withdrawn.


title: Dark matter searches and Colliders

abstract:
  We study the potential of neutralino dark matter searches and SUSY particle
production at colliders in the framework of the Minimal Supersymmetric Standard
Model. We show the effects of a non universal gluino mass parameter. The future
experiments will be a stringent probe of the low energy MSSM and neutralino
dark matter scenario. The deeper informations on both supersymmetry and
astrophysics hypothesis will be obtained by correlation of the different
signals or absence of signal.


title:
Test of Lorentz Invariance in Electrodynamics Using Rotating Cryogenic
  Sapphire Microwave Oscillators

abstract:
  We present the first results from a rotating Michelson-Morley experiment that
uses two orthogonally orientated cryogenic sapphire resonator-oscillators
operating in whispering gallery modes near 10 GHz. The experiment is used to
test for violations of Lorentz Invariance in the frame-work of the photon
sector of the Standard Model Extension (SME), as well as the isotropy term of
the Robertson-Mansouri-Sexl (RMS) framework. In the SME we set a new bound on
the previously unmeasured $\tilde{\kappa}_{e-}^{ZZ}$ component of
$2.1(5.7)\times10^{-14}$, and set more stringent bounds by up to a factor of 7
on seven other components. In the RMS a more stringent bound of
$-0.9(2.0)\times 10^{-10}$ on the isotropy parameter, $P_{MM}=\delta - \beta +
{1/2}$ is set, which is more than a factor of 7 improvement. More detailed
description of the experiment and calculations can be found in: hep-ph/0506200


title:
Can one detect new physics in I=0 and/or I=2 contributions to the decays
  B --> pi pi?

abstract:
  We study the effects of new-physics contributions to B --> pi pi decays,
which can be parametrized as four new complex quantities. A simple analysis is
provided by utilizing the reparametrization invariance of the decay amplitudes.
We find that six quantities can be reabsorbed into the definitions of Standard
Model-like parameters. As a result, the usual isospin analysis provides only
two constraints on new physics which are independent of estimates for the
Standard Model contributions. In particular, we show that one is not sensitive
to new physics affecting the I=0 amplitudes. On the other hand, I=2 new physics
can be detected, and its parameters can be measured by using independent
determinations of the weak phases. We obtain constraints on these new-physics
parameters through a fit to the current experimental data.


title:
Next-to-Leading Order QCD Correction to $\bm{e^+ e^- \to J/\psi +
  \eta_c}$ at $\sqrt {s}=10.6$GeV}

abstract:
  One of the most challenging open problems in heavy quarkonium physics is the
double charm production in $e^+e^-$ annihilation at B factories. The measured
cross section of $e^+ e^- \to J/\psi + \eta_c$ is much larger than leading
order (LO) theoretical predictions. With the nonrelativistic QCD factorization
formalism, we calculate the next-to-leading order (NLO) QCD correction to this
process. Taking all one-loop self-energy, triangle, box, and pentagon diagrams
into account, and factoring the Coulomb-singular term into the $c\bar c$ bound
state wave function, we get an ultraviolet and infrared finite correction to
the cross section of $e^+e^-\to J/\psi + \eta_c$ at $\sqrt{s} =10.6$ GeV. We
find that the NLO QCD correction can substantially enhance the cross section
with a K factor (the ratio of NLO to LO) of about 1.8-2.1; hence it greatly
reduces the large discrepancy between theory and experiment. With $m_c=1.4{\rm
GeV}$ and $\mu=2m_c$, the NLO cross section is estimated to be 18.9 fb, which
reaches to the lower bound of experiment.


title: A Calculation of the Physical Mass of Sigma Meson

abstract:
  We calculate the physical mass and the width of the sigma meson by
considering that it couples in vacuum to two virtual pions. The mass is
calculated by using the spectral function, and we find that it is about 600MeV.
In addition, we obtained the value of 250MeV for the width of its spectral
function. The value obtained for the mass, is in an excellent agreement with
that reported in the Particle data Book for the sigma meson, which is also
named f0(600). This result also shows that the sigma meson can be considered as
a two pion resonance.


title: NRQCD Factorization and Universality of NRQCD Matrix Elements

abstract:
  The approach of nonrelativistic QCD(NRQCD) factorization was proposed to
study inclusive production of a quarkonium. It is widely used and successful.
However, a recent study of gluon fragmentation into a quarkonium at two-loop
level shows that the factorization is broken. It is suggested that the
color-octet NRQCD matrix elements should be modified by adding a gauge link to
restore the factorization. The modified matrix elements may have extra
soft-divergences at one-loop level which the unmodified can not have, and this
can lead to a violation of the universality of these matrix elements. In this
letter, we examine in detail the NRQCD factorization for inclusive quarkonium
production in $e^+ e^-$ annihilation at one-loop level. Our results show that
the factorization can be made without the modification of NRQCD matrix elements
and it can also be made for relativistic corrections. It turns out that the
suggested gauge link will not lead to nonzero contributions to color-octet
NRQCD matrix elements at one-loop level and at any order of $v$. Therefore the
universality holds at least at one-loop level.


title:
Is Dark Matter Heavy Because of Electroweak Symmetry Breaking?
  Revisiting Heavy Neutrinos

abstract:
  A simple and well-motivated explanation for the origin of dark matter is that
it consists of thermal relic particles that get their mass entirely through
electroweak symmetry breaking. The simplest models implementing this
possibility predict a dark matter candidate that consists of a mixture of two
Dirac neutrinos with opposite isospin, and so has suppressed coupling to the Z.
These models predict dark matter masses of m_{DM}~45 GeV or m_{DM}~90-95 GeV
and WIMP-neutron spin-independent cross sections
\sigma_{WIMP-n}~10^{-6}-10^{-8} pb. Current direct dark matter searches are
probing a portion of the parameter space of these models while future
experiments sensitive to \sigma_{WIMP-n}~10^{-8} pb will probe the remainder.
An enhancement of the galactic halo gamma ray and positron flux coming from
annihilations of these particles is also expected across the ~1-100 GeV range.
The framework further suggests an environmental explanation of the hierarchy
between the weak and Planck scales and of the small value of the cosmological
constant relative to the weak scale.


title:
Analytical and numerical evaluation of the Debye and Meissner masses in
  dense neutral three-flavor quark matter

abstract:
  We calculate the Debye and Meissner masses and investigate chromomagnetic
instability associated with the gapless color superconducting phase changing
the strange quark mass $M_s$ and the temperature $T$. Based on the analytical
study, we develop a computational procedure to derive the screening masses
numerically from curvatures of the thermodynamic potential. When the
temperature is zero, from our numerical results for the Meissner masses, we
find that instability occurs for $A_1$ and $A_2$ gluons entirely in the gapless
color-flavor locked (gCFL) phase, while the Meissner masses are real for $A_4$,
$A_5$, $A_6$, and $A_7$ until $M_s$ exceeds a certain value that is larger than
the gCFL onset. We then handle mixing between color-diagonal gluons $A_3$,
$A_8$, and photon $A_\gamma$, and clarify that, among three eigenvalues of the
mass squared matrix, one remains positive, one is always zero because of an
unbroken $U(1)_\tilde{Q}$ symmetry, and one exhibits chromomagnetic instability
in the gCFL region. We also examine the temperature effects that bring
modifications into the Meissner masses. The instability found at large $M_s$
for $A_4$, $A_5$, $A_6$, and $A_7$ persists at finite $T$ into the $u$-quark
color superconducting (uSC) phase which has $u$-$d$ and $s$-$u$ but no $d$-$s$
quark pairing and also into the two-flavor color superconducting (2SC) phase
characterized by $u$-$d$ quark pairing only. The $A_1$ and $A_2$ instability
also goes into the uSC phase, but the 2SC phase has no instability for $A_1$,
$A_2$, and $A_3$. We map the unstable region for each gluon onto the phase
diagram as a function of $M_s$ and $T$.


title:
Multiplicity fluctuations and percolation of strings in hadron-hadron
  and nucleus-nucleus collisions

abstract:
  We argue that recent NA49 results on multiparticle distributions and
fluctuations, as a function of the number of participant nucleons, suggest that
percolation plays an important role in particle production at high densities.


title: Some Applications of Thermal Field Theory to Quark-Gluon Plasma

abstract:
  The lecture provides a brief introduction of thermal field theory within
imaginary time formalism, the Hard Thermal Loop perturbation theory and some of
its application to the physics of the quark-gluon plasma, possibly created in
relativistic heavy ion collisions.


title: Global analysis of three-flavor neutrino masses and mixings

abstract:
  We present a comprehensive phenomenological analysis of a vast amount of data
from neutrino flavor oscillation and non-oscillation searches, performed within
the standard scenario with three massive and mixed neutrinos, and with
particular attention to subleading effects. The detailed results discussed in
this review represent a state-of-the-art, accurate and up-to-date (as of August
2005) estimate of the three-neutrino mass-mixing parameters.


title:
Isospin Analysis of pentaquark production forbids gamma p --> Theta^+
  K_s and allows gamma n --> Theta^+ K^-

abstract:
  The discrepancy between Theta^+ photoproduction on proton vs. deuteron can be
resolved if the photon couples much more strongly to K^+K^- than to K0 K0bar as
indicated by the experimentally observed asymmetry between gamma p -->
Lambda(1520) K^+ and gamma n --> Lambda(1520) K_s. Significant
signal-background interference effects can occur in experiments like gamma N
--> Kbar Theta^+ which search for the Theta^+ as a narrow I=0 resonance in a
definite final state against a nonresonant background, with an experimental
resolution coarser than the expected resonance width. We show that when the
signal and background have roughly the same magnitude, destructive interference
can easily combine with a limited experimental resolution to completely destroy
the resonance signal. Whether or not this actually occurs depends critically on
the yet unknown relative phase of the I=0 and I=1 amplitudes. We discuss the
implications for some specific experiments.


title: From transition magnetic moments to majorana neutrino masses

abstract:
  It is well known that a majorana mass induces a (small) transition magnetic
moment. The converse is also true; in this paper we estimate the loop
contribution of transition magnetic moments $[\mu]_{\alpha \beta}$ to the
neutrino mass matrix $[m]_{\alpha \beta}$. We show that for hierarchical
neutrino masses, the contribution of $[\mu]_{e \tau}$ to $[m]_{e \tau}$ can
exceed the experimental value of $[m]_{e \tau}$.


title:
The Meaning of Higgs: tau^+ tau^- and gamma gamma at the Tevatron and
  the LHC

abstract:
  In this paper we discuss how to extract information about physics beyond the
Standard Model (SM) from searches for a light SM Higgs at Tevatron Run II and
CERN LHC. We demonstrate that new (pseudo)scalar states predicted in both
supersymmetric and dynamical models can have enhanced visibility in standard
Higgs search channels, making them potentially discoverable at Tevatron Run II
and CERN LHC. We discuss the likely sizes of the enhancements in the various
search channels for each model and identify the model features having the
largest influence on the degree of enhancement. We compare the key signals for
the non-standard scalars across models and also with expectations in the SM, to
show how one could start to identify which state has actually been found. In
particular, we suggest the likely mass reach of the Higgs search in p pbar/pp
to H to tau^+tau^- for each kind of non-standard scalar state and we
demonstrate that p pbar/pp to H to gamma gamma may cleanly distinguish the
scalars of supersymmetric models from those of dynamical models.


title: Factorization in the Production and Decay of the X(3872)

abstract:
  The production and decay of the X(3872) are analyzed under the assumption
that the X is a weakly-bound molecule of the charm mesons D^0 \bar D^{*0} and
D^{*0} \bar D^0. The decays imply that the large D^0 \bar D^{*0} scattering
length has an imaginary part. An effective field theory for particles with a
large complex scattering length is used to derive factorization formulas for
production rates and decay rates of X. If a partial width is calculated in a
model with a particular value of the binding energy, the factorization formula
can be used to extrapolate to other values of the binding energy and to take
into account the width of the X. The factorization formulas relate the rates
for production of X to those for production of D^0 \bar D^{*0} and D^{*0} \bar
D^0 near threshold. They also imply that the line shape of X differs
significantly from that of a Breit-Wigner resonance.


title: Mass inequality for the quark propagator

abstract:
  We show that for any gauge-fixing scheme with positive semi-definite
functional integral measure, the inverse correlation length of the quark
propagator is bounded below by one-half the pion mass.


title:
Moments of generalized parton distribution functions and the nucleon
  spin contents

abstract:
  It is shown that, based only on two empirically known facts besides two
reasonable theoretical postulates, we are inevitably led to a conclusion that
the quark orbital angular momentum carries nearly half of the total nucleon
spin. We also perform a model analysis to find that the quark spin fraction
$\Delta \Sigma$ is extremely sensitive to the pion mass, which may resolve the
discrepancy between the observation and the prediction of the recent lattice
QCD simulation carried out in the heavy pion region.


title:
Negative Momentum Susceptibility of Breached Pairing Superfluidity and
  Singularity at BP-BCS Superfluid Transition Point

abstract: This paper has been withdrawn. It is indeed rubbish.


title: Lorentz and CPT Invariance Violation In High-Energy Neutrinos

abstract:
  High-energy neutrino astronomy will be capable of observing particles at both
extremely high energies and over extremely long baselines. These features make
such experiments highly sensitive to the effects of CPT and Lorentz violation.
In this article, we review the theoretical foundation and motivation for CPT
and Lorentz violating effects, and then go on to discuss the related
phenomenology within the neutrino sector. We describe several signatures which
might be used to identify the presence of CPT or Lorentz violation in next
generation neutrino telescopes and cosmic ray experiments. In many cases,
high-energy neutrino experiments can test for CPT and Lorentz violation effects
with much greater precision than other techniques.


title:
Pion Velocity near the Chiral Phase Transition Point in the Vector
  Manifestation

abstract:
  We study the pion velocity near the critical temperature $T_c$ of chiral
symmetry restoration in QCD. Using chiral perturbation theory based on hidden
local symmetry (HLS) as an effective field theory, where the chiral symmetry
restoration is realized as the vector manifestation (VM), we show that the pion
velocity for $T \to T_c$ is close to the speed of light, $v_\pi (T) = 0.83 -
0.99$ which is at variance with the sigma model result which predicts $v_\pi
(T_c) = 0$. Our prediction on $v_\pi (T_c)$ is compared with the value
extracted from the recent RHIC data.


title: Axino dark matter in brane world cosmology

abstract:
  We discuss dark matter in the brane world scenario. We work in the
Randall-Sundrum type II brane world and assume that the lightest supersymmetric
particle is the axino. We find that the axinos can play the role of cold dark
matter in the universe, provided that the five-dimensional Planck mass is
bounded both from below and from above. This is possible for higher reheating
temperatures compared to the conventional four-dimensional cosmology due to a
novel expansion law for the universe.


title: Bimaximal fermion mixing from the quark and leptonic mixing matrices

abstract:
  In this paper, we show how the mixing angles of the standard parameterization
add when multiplying the quark and leptonic mixing matrices, i.e., we derive
explicit sum rules for the quark and leptonic mixing angles. In this
connection, we also discuss other recently proposed sum rules for the mixing
angles assuming bimaximal fermion mixing. In addition, we find that the present
experimental and phenomenological data of the mixing angles naturally fulfill
our sum rules, and thus, give rise to bilarge or bimaximal fermion mixing.


title:
Jet absorption and corona effect at RHIC. Extracting collision geometry
  from experimental data

abstract:
  We demonstrate a possible existence of a finite formation time of strongly
interacting plasma in nuclear collisions at RHIC from recent experimental data.
To show this, we use a simple model based on Monte Carlo simulation of
nucleus-nucleus collisions with realistic nuclear density distribution. The
most striking feature of the experimental data - an absence of absorption of
high transverse momentum pions in the reaction plane direction for
mid-peripheral collisions - points to the presence of a surface zone with no
absorption and strong suppression in the inner core. A natural interpretation
of such a zone could be the plasma formation time T~2-3 fm/c. The existence of
a formation time could dramatically change our understanding of many
experimentally observed features. With this assumption we describe the angular
anisotropy of high transverse momentum pions with respect to the reaction plane
and the centrality dependence of nuclear modification factor in Au+Au and Cu+Cu
collisions.


title: The Nucleon and Delta Baryons in the Unified Picture for Hadron Spectra

abstract:
  In this article it has been shown that the recent PDG Baryon Particle
Listings of the Nucleon and Delta states, including some evidence for new
states, have excellently incorporated in the unified picture for hadron spectra
created earlier \cite{8}. It is claimed that this is a strong confirmation of
our theoretical concept. A comparison with experiment is briefly discussed.


title: RG analysis and Magnetic instability in gapless superconductors

abstract:
  We study the magnetic instability of gapless superconductors. The instability
arises due to the infrared divergence associated with the gapless modes of the
superconductor. When the Fermi-surface mismatch between pairing fermions is
close to the gap, the gapless modes have a quadratic energy dispersion relation
at low energy and open a secondary gap at the Fermi surface, which is only
power-suppressed by the coupling. On the other hand, for a large mismatch, we
find the gapless superconductor does not open a secondary gap, but instead
makes transition to a new phase by forming the condensate of supercurrents. We
calculate the condensate of supercurrents by minimizing the effective
potential. In the new phase, the Meissner mass is positive for the magnetic
fields orthogonal to the direction of the condensate but zero in the parallel
direction.


title: Revisiting 5D chiral symmetry breaking and holographic QCD models

abstract:
  We take a closer look at the recently discussed models of hadrons based on
holographic ideas and chiral symmetry breaking in five dimensions. We study the
two point correlator in detail and look at the field theoretic properties
needed to be satisfied by the correlator. It is shown that the spectral density
becomes negative, violating the basic requirements for the Kallen-Lehmann
representation. We briefly discuss the implications of this violation of the
positivity of the spectral density and also discuss possible origin of such a
violation in these models. Put simply this means that such models are not
physical descriptions of the hadron spectrum.


title: The simplest 3+2 model with two light sterile neutrinos

abstract:
  The simplest 3+2 neutrino model is described, where two light sterile
neutrinos mix very weakly with three active neutrinos and mutually do not mix
at all, while the mass-squared scale of the possible LSND effect is provided by
m_5^2 - m^2_4 (\nu_4 and \nu_5 being two additional mass neutrinos connected
with the existence of two sterile neutrinos \nu_s and \nu_{s'}. This 3+2 model
is not better for explaining the LSND effect than the simplest 3+1 neutrino
model, where one light sterile neutrino mixes very weakly with three active
neutrinos, while the mass-squared scale of the possible LSND effect is given by
m_4^2 - m^2_1 (\nu_4 denoting an additional mass neutrino existing due to a
sterile neutrino \nu_s). However, a small LSND effect with amplitude of the
order O($10^{-3}$) is not excluded by the present (pre-MiniBooNE) data.


title:
The impact of solar and atmospheric parameter uncertainties on the
  measurement of $\theta_{13}$ and $\delta$

abstract:
  We present in this paper the analysis of the measurement of the unknown PMNS
parameters $\theta_{13}$ and $\delta$ at future LBL facilities performing
complete three parameters fits, each time fully including in the fit one of the
atmospheric and solar oscillation parameters within its present (future) error.
We show that, due to the presence of degeneracies, present uncertainties on
$\theta_{23}$ and $\Delta m^2_{23}$ worsen significantly the precision on
($\theta_{13}$,$\delta$) at future LBL experiments. Only if a precision on the
atmospheric parameters at least similar to what expected at T2K-I is reached,
then the sensitivities to $\theta_{13}$ and $\delta$ that have been presented
in the literature for many facilities (where $\theta_{23}$ and $\Delta
m^2_{23}$ are generally considered as fixed external inputs) can indeed be
almost recovered.On the other hand, the impact on this measurement of the
uncertainties on the solar parameters, $\theta_{12}$ and $\Delta m^2_{12}$ is
already negligible. Our analysis has been performed using three reference
setups: the SPL Super-Beam and the standard low-$\gamma$ $\beta$-Beam, both
aiming toward a Mton Water \v{C}erenkov detector located at L=130 km; the 50
GeV Neutrino Factory with a 40 kton Magnetized Iron Detector to look for the
``golden channel'' $\nu_e \to \nu_\mu$ with baseline L=3000 km and a 4 kton
Emulsion Cloud Chamber to look for the ``silver channel'' $\nu_e \to \nu_\tau$
with baseline L=732 km.


title: Remark on double diffractive chi meson production

abstract:
  The double pomeron exchange contributions to the central inclusive and
exclusive chi_c0 and chi_b0 mesons production in the Bialas-Landshoff approach
are calculated. We find the model to be consistent with the preliminary CDF
upper limit on double diffractive exclusive chi_c0 production cross section.


title:
Neutrinoless Double Beta Decay and Future Neutrino Oscillation Precision
  Experiments

abstract:
  We discuss to what extent future precision measurements of neutrino mixing
observables will influence the information we can draw from a measurement of
(or an improved limit on) neutrinoless double beta decay. Whereas the Delta m^2
corresponding to solar and atmospheric neutrino oscillations are expected to be
known with good precision, the parameter theta_{12} will govern large part of
the uncertainty. We focus in particular on the possibility of distinguishing
the neutrino mass hierarchies and on setting a limit on the neutrino mass. We
give the largest allowed values of the neutrino masses which allow to
distinguish the normal from the inverted hierarchy. All aspects are discussed
as a function of the uncertainty stemming from the involved nuclear matrix
elements. The implications of a vanishing, or extremely small, effective mass
are also investigated. By giving a large list of possible neutrino mass
matrices and their predictions for the observables, we finally explore how a
measurement of (or an improved limit on) neutrinoless double beta decay can
help to identify the neutrino mass matrix if more precise values of the
relevant parameters are known.


title:
Nonlinear evolution equations in QCD and effective Hamiltonian at high
  energy

abstract:
  In this talk I briefly present recent developments in the theory of the Color
Glass Condensate.
  The duality between the dense and dilute regimes of the gluon field is
discussed as well as the effective selfdual Hamiltonian which includes both
Pomeron merging and Pomeron splitting.


title: M_W, sin^2 \theta_{eff} and m_h in the NMFV MSSM

abstract:
  The effects of loop contributions to the electroweak precision observables
and m_h in the MSSM with non-minimal flavour violation (NMFV) are analyzed,
including the mixing between third and second generation squarks. The
mixing-induced shift in M_W can amount to 140 MeV and to 70x10^{-5} in sin^2
\theta_{eff} for extreme values of squarks mixing, allowing to set limits on
the NMFV parameters. The corrections for m_h are usually small and can amount
up to O(5 GeV) for large flavour violation.


title: The Gravitino in Gaugino Mediation

abstract:
  We show that for gaugino mediated supersymmetry breaking the gravitino mass
is bounded from below. For a size of the compact dimensions of order the
unification scale and a cutoff given by the higher-dimensional Planck mass, we
find $m_{3/2} \gtrsim 10 GeV$. In a large domain of parameter space, the
gravitino is the lightest superparticle with a scalar $\tilde\tau$-lepton as
the next-to-lightest superparticle.


title: CP-odd Phase Correlations and Electric Dipole Moments

abstract:
  We revisit the constraints imposed by electric dipole moments (EDMs) of
nucleons and heavy atoms on new CP-violating sources within supersymmetric
theories. We point out that certain two-loop renormalization group corrections
induce significant mixing between the basis-invariant CP-odd phases. In the
framework of the constrained minimal supersymmetric standard model (CMSSM), the
CP-odd invariant related to the soft trilinear A-phase at the GUT scale,
theta_A, induces non-trivial and distinct CP-odd phases for the three gaugino
masses at the weak scale. The latter give one-loop contributions to EDMs
enhanced by tan beta, and can provide the dominant contribution to the electron
EDM induced by theta_A. We perform a detailed analysis of the EDM constraints
within the CMSSM, exhibiting the reach, in terms of sparticle spectra, which
may be obtained assuming generic phases, as well as the limits on the CP-odd
phases for some specific parameter points where detailed phenomenological
studies are available. We also illustrate how this reach will expand with
results from the next generation of experiments which are currently in
development.


title: Electroweak-Scale Resonant Leptogenesis

abstract:
  We study minimal scenarios of resonant leptogenesis near the electroweak
phase transition. These models offer a number of testable phenomenological
signatures for low-energy experiments and future high-energy colliders. Our
study extends previous analyses of the relevant network of Boltzmann equations,
consistently taking into account effects from out of equilibrium sphalerons and
single lepton flavours. We show that the effects from single lepton flavours
become very important in variants of resonant leptogenesis, where the observed
baryon asymmetry in the Universe is created by lepton-to-baryon conversion of
an individual lepton number, for example that of the tau lepton. The
predictions of such resonant tau-leptogenesis models for the final baryon
asymmetry are almost independent of the initial lepton-number and heavy
neutrino abundances. These models accommodate the current neutrino data and
have a number of testable phenomenological implications. They contain
electroweak-scale heavy Majorana neutrinos with appreciable couplings to
electrons and muons, which can be probed at future e+ e- and mu+ mu-
high-energy colliders. In particular, resonant tau-leptogenesis models predict
sizeable 0\nu\beta\beta decay, as well as e- and mu-number-violating processes,
such as mu -> e gamma and mu -> e conversion in nuclei, with rates that are
within reach of the experiments proposed by the MEG and MECO collaborations.


title:
Theoretical summary: The First International Conference on Hard and
  Electromagnetic Probes in Relativistic Nuclear Collisions

abstract:
  This is an attempt to summarize the theoretical talks given at the First
International Conference "Hard Probes '04", dedicated to the study of the
properties of quark-gluon matter and its diagnostics with the hard processes.
  The talk covers the following topics: the structure of quark-gluon matter at
finite temperature; the theory of nuclear wave functions at small Bjorken x;
the propagation of jets, heavy quarkonia and heavy quarks through the dense QCD
matter.


title:
First quantized approaches to neutrino oscillations and second
  quantization

abstract:
  Neutrino oscillations are treated from the point of view of relativistic
first quantized theories and compared to second quantized treatments. Within
first quantized theories, general oscillation probabilities can be found for
Dirac fermions and charged spin 0 bosons. A clear modification in the
oscillation formulas can be obtained and its origin is elucidated and confirmed
to be inevitable from completeness and causality requirements. The left-handed
nature of created and detected neutrinos can also be implemented in the first
quantized Dirac theory in presence of mixing; the probability loss due to the
changing of initially left-handed neutrinos to the undetected right-handed
neutrinos can be obtained in analytic form. Concerning second quantized
approaches, it is shown in a calculation using virtual neutrino propagation
that both neutrinos and antineutrinos may also contribute as intermediate
particles. The sign of the contributing neutrino energy may have to be chosen
explicitly without being automatic in the formalism. At last, a simple second
quantized description of the flavor oscillation phenomenon is devised. In this
description there is no interference terms between positive and negative
components, but it still gives simple normalized oscillation probabilities. A
new effect appearing in this context is an inevitable but tiny violation of the
initial flavor of neutrinos. The probability loss due to the conversion of
left-handed neutrinos to right-handed neutrinos is also presented.


title:
One-loop corrections to the Drell-Yan process in SANC (I). The charged
  current case

abstract:
  Radiative corrections to the charged current Drell-Yan processes are
revisited. Complete one-loop electroweak corrections are calculated within the
automatic SANC system. Electroweak scheme dependence and the choice of the
factorization scale are discussed. Comparisons with earlier calculations are
presented.


title:
Transverse positron polarization in the $\mu^+ \to e^+ \bar{\nu_\mu}
  \nu_e$ decay in SM

abstract:
  In this paper transverse positron polarization in the $\mu^+ \to e^+ \bar
{\nu_{\mu}} \nu_e$ decay in the framework of SM is considered. It is shown that
the final state interaction effect leads to nonzero transverse polarization.
Numerical value of the considered effect proved to be negligible. Thus SM
contribution to the transverse positron polarization in the $\mu^+ \to e^+ \bar
{\nu_{\mu}} \nu_e$ decay will not be the obstacle to a new physics searches.


title:
Large Non-perturbative Effects of Small \Delta m^2_{21}/\Delta m^2_{31}
  and \sin \theta_{13} on Neutrino Oscillation and CP Violation in Matter

abstract:
  In the framework of three generations, we consider the CP violation in
neutrino oscillation with matter effects. At first, we show that the
non-perturbative effects of two small parameters, \Delta m_{21}^2/\Delta
m_{31}^2 and \sin \theta_{13}, become more than 50% in certain ranges of energy
and baseline length. This means that the non-perturbative effects should be
considered in detailed analysis in the long baseline experiments. Next, we
propose a method to include these effects in approximate formulas for
oscillation probabilities. Assuming the two natural conditions,
\theta_{23}=45^\circ and the fact that the matter density is symmetric, a set
of approximate formulas, which involve the non-perturbative effects, has been
derived in all channels.


title:
Glueball spectrum based on a rigorous three-dimensional relativistic
  equation for two-gluon bound states I: Derivation of the relativistic
  equation

abstract:
  A rigorous three-dimensional relativistic equation satisfied by two-gluon
bound states is derived from the QCD with massive gluons. With the gluon fields
and the quark fields being expanded in terms of the gluon multipole fields and
the spherical Dirac spinors respectively, the equation is well established in
the angular momentum representation and hence is much convenient for solving
the problem of two-gluon glueball spectra. In particular, the interaction
kernel in the equation is exactly derived and given a closed expression which
includes all the interactions taking place in the two-gluon glueballs. The
kernel contains only a few types of Green's functions and commutators.
Therefore, it is not only easily calculated by the perturbation method, but
also provides a suitable basis for nonperturbative investigations.


title:
Glueball spectrum based on a rigorous three-dimensional relativistic
  equation for two-gluon bound states II: calculation of the glueball spectrum

abstract:
  In the preceding paper, a rigorous three-dimensional relativistic equation
for two-gluon bound states was derived from the QCD with massive gluons and
represented in the angular momentum representation. In order to apply this
equation to calculate the glueball spectrum, in this paper, the equation is
recast in an equivalent three-dimensional relativistic equation satisfied by
the two-gluon positive energy state amplitude. The interaction Hamiltonian in
the equation is exactly derived and expressed as a perturbative series. The
first term in the series describes the one-gluon exchange interaction which
includes fully the retardation effect in it. This term plus the linear
confining potential are chosen to be the interaction Hamiltonian and employed
in the practical calculation. With the integrals containing three and four
spherical Bessel functions in the QCD vertices being analytically calculated,
the interaction Hamiltonian is given an explicit expression in the angular
momentum representation. Numerically solving the relativistic equation with
taking the contributions arising from the retardation effect and the
longitudinal mode of gluon fields into account, a set of masses for the
$0^{++},0^{-+},1^{++},1^{-+},2^{++}$ and $2^{-+\text{}}$ glueball states are
obtained and are in fairly good agreement with the predictions given by the
lattice simulation


title:
$B_s \to \mu^+ \mu^-$ and the upward-going muon flux from the WIMP
  annihilation in the sun or the earth

abstract:
  We consider the upward-going muon flux due to the WIMP annihilations in the
cores of the sun and the earth, including the upper bound on the branching
ratio for $B_s \to \mu^+ \mu^-$ decay. We find that the constraint from $B_s
\to \mu^+ \mu^-$ is very strong in most parameter space, and exclude the
supergravity parameter space regions where the expected upward-going muon
fluxes are within the expected reach of AMANDA II.