title: Bounds on the cosmogenic neutrino flux

abstract:
  Under the assumption that some part of the observed highest energy cosmic
rays consists of protons originating from cosmological distances, we derive
bounds on the associated flux of neutrinos generated by inelastic processes
with the cosmic microwave background photons. We exploit two methods. First, a
power-like injection spectrum is assumed. Then, a model-independent technique,
based on the inversion of the observed proton flux, is presented. The inferred
lower bound is quite robust. As expected, the upper bound depends on the
unknown composition of the highest energy cosmic rays. Our results represent
benchmarks for all ultrahigh energy neutrino telescopes.


title: Charged Kaon K \to 3 pi CP Violating Asymmetries at NLO in CHPT

abstract:
  We give the first full next-to-leading order analytical results in Chiral
Perturbation Theory for the charged Kaon K \to 3 pi slope g and decay rates
CP-violating asymmetries. We have included the dominant Final State
Interactions at NLO analytically and discussed the importance of the unknown
counterterms. We find that the uncertainty due to them is reasonable just for
\Delta g_C, i.e. the asymmetry in the K^+ \to pi^+ pi^+ pi^- slope g; we get
\Delta g_C = -(2.4 +- 1.2) 10^{-5}. The rest of the asymmetries are very
sensitive to the unknown counterterms. In particular, the decay rate
asymmetries can change even sign. One can use this large sentivity to get
valuable information on those counterterms and on Im(G_8) coupling --very
important for the CP-violating parameter epsilon'_K-- from the eventual
measurement of these asymmetries. We also provide the one-loop O(e^2 p^2)
electroweak octet contributions for the neutral and charged Kaon K \to 3 pi
decays.


title: Gamma rays from the Galactic bulge and large extra dimensions

abstract:
  An intriguing feature of extra dimensions is the possible production of
Kaluza--Klein gravitons by nucleon-nucleon bremsstrahlung in the course of core
collapse of massive stars, as pointed out by Hannestad and Raffelt. In this
event Kaluza--Klein gravitons are copiously produced and a significant fraction
of them remains trapped around the newly born neutron stars. They slowly decay
into 2 gamma rays, making neutron stars gamma-ray sources. In this letter, we
strengthen considerably the limits on the radius of compactification of
extra-dimensions for small number $n$ of them, or alternatively the fundamental
scale of quantum gravity, considering the gamma-ray emission of the whole
population of neutron stars sitting in the Galactic bulge, instead of the
closest member of this category. For $n=1$ the constraint on the
compactification radius is $R<400\mu$m, overlapping with the distance
($180\mu$m) at which Newtons law is directly measured. In addition, for n=1 and
n=2, the fundamental energy scale of quantum gravity is far beyond the collider
technology. These results imply that if $n\lesssim4$ and if strong gravity is
around a TeV, the compactification topology is to be more complex than that of
a torus.


title:
Constraints on neutrino oscillation parameters from the SNO salt phase
  data

abstract:
  The physics implications of the just published salt phase data from the SNO
experiment are examined. The effect of these data on the allowed ranges of the
solar neutrino oscillation parameters, $\Delta_m^2_{21}$ and
$\sin^2\theta_{12}$, are studied in the cases of two- and three- neutrino
mixing. In the latter case we derive an upper limit on the angle $\theta_{13}$.
Constraints on the solar $\nu_e$ transitions into a mixture of active and
sterile neutrinos are also presented. Finally, we give predictions for the
day-night asymmetry in the SNO experiment, for the event rate in the BOREXINO
and LowNu experiments, and discuss briefly the constraints on the solar
neutrino oscillation parameters which can be obtained with prospective KamLAND
data.


title: A Hagedorn temperature in post-inflationary dynamics?

abstract:
  We consider the possibility of regarding the maximum temperature $\tm$ of a
plasma of inflaton decay products as a Hagedorn temperature connected with the
transition from an inflaton-dominated epoch to a radiation-dominated universe.
Employing a ``bottom-up'' approach to inflaton decay, we show that the limiting
temperature $T_{\rm H}\sim m_{\phi}$, as obtained from a numerical analysis of
the evolution equations, can also be understood theoretically in a Hagedorn
picture of the phase transition.


title:
Deep inelastic scattering as x -> 1 using soft-collinear effective
  theory

abstract:
  Soft-collinear effective theory (SCET) is used to sum Sudakov
double-logarithms in the x ->1 endpoint region for the deep inelastic
scattering structure function. The calculations are done in both the target
rest frame and the Breit frame. The separation of scales in the effective
theory implies that the anomalous dimension of the SCET current is linear in ln
mu, and the anomalous dimension for the Nth moment of the structure function is
linear in ln N, to all orders in perturbation theory. The SCET formulation is
shown to be free of Landau pole singularities. Some important differences
between the deep inelastic structure function and the shape function in B decay
are discussed.


title: Geometric scaling as traveling waves

abstract:
  We show the relevance of the nonlinear Fisher and Kolmogorov-Petrovsky-
Piscounov (KPP) equation to the problem of high energy evolution of the QCD
amplitudes. We explain how the traveling wave solutions of this equation are
related to geometric scaling, a phenomenon observed in deep-inelastic
scattering experiments. Geometric scaling is for the first time shown to result
from an exact solution of nonlinear QCD evolution equations. Using general
results on the KPP equation, we compute the velocity of the wave front, which
gives the full high energy dependence of the saturation scale.


title: Non-perturbative match of ultraviolet renormalon

abstract:
  The paper is motivated by observation of a kind of branes in the vacuum state
of the lattice SU(2) gluodynamics. The branes represent two-dimensional
vortices whose total area scales in physical units while the non-Abelian action
diverges in the ultraviolet. We consider the question whether effects of the
branes can be accommodated into the continuum theory. We demonstrate that at
least in case of the gluon condensate (plaquette action) and of the heavy quark
potential the contribution of the branes corresponds to the ultraviolet
renormalon. Thus, the vortices might represent a non-perturbative match of the
ultraviolet renormalon. Such an identification constrains, in turn, properties
of the branes.


title:
Instanton contribution to the pion and proton formfactors at Q^2 greater
  than 1 GeV^2

abstract:
  Studying the instanton-induced contributions to various hard exclusive
reactions provides physical insight into the transition from the
non-perturbative to the perturbative regime of QCD. To this end, we study the
leading-instanton contribution to the electro-magnetic and transition
formfactors, using an effective theory of the Instanton Liquid Model. We report
predictions for the space-like electro-magnetic formfactor of the pion, as well
as recent results for the Dirac formfactor of the proton.


title: Branes at low energy

abstract:
  Brane models at low energy are described by an effective action involving
gravity and two moduli fields associated with the brane positions. The
scalar-tensor nature of the effective theory and the coupling to matter are
explicitly spelt out. We discuss the post-Newtonian gravitational constraints
on the models, some applications to quintessence and the variations of
constants.


title: Brane World Moduli and the CMB

abstract:
  The evolution of moduli fields, which naturally appear in higher dimensional
models such as brane worlds, and their effects on the anisotropies of the
cosmological microwave background radiation is discussed.


title: Fermion Masses and Mixings in the Little Flavon Model

abstract:
  We present a complete analysis of the fermion masses and mixing matrices in
the framework of the little flavon model. In this model textures are generated
by coupling the fermions to scalar fields, the little flavons, that are
pseudo-Goldstone bosons of the breaking of a global SU(6) symmetry. The Yukawa
couplings arise from the vacuum expectation values of the flavon fields, their
sizes controlled by a potential a la Coleman-Weinberg. Quark and lepton mass
hierarchies and mixing angles are accomodated within the effective approach in
a natural manner.


title: Mu + N --> Tau + N at a Muon or Neutrino Factory

abstract:
  The experimental discovery of large nu_mu-nu_tau mixing indicates that
analogous mixing in the charged lepton sector could be substantial. We consider
the possibility that if a high intensity muon beam, perhaps at the early stages
of a muon or neutrino factory, strikes a nuclear target, then conversion of
some of the muons into tau leptons could occur (similar to the conversion of
muons to electrons at MECO). Using current experimental limits on rare tau
decays to bound the size of the relevant operators, we find that a 50 GeV muon
beam, with 10^20 muons on target per year, could yield as many as 10^7 mu + N
--> tau + N events per year. Backgrounds could be substantial, and we comment
on the possibility of detection of this process.


title: Origin of universes with different properties

abstract:
  The concept of a random Lagrangian is proposed. It is considered as a basis
for a new view of the old problems such as renormalization, nonzero vacuum
energy and the anthropic principle. It gives rise to nontrivial consequences
both in cosmology and in particle physics. It is shown that some of them could
be checked in the nearest future. Scalar-tensor models of gravity are a direct
and necessary consequence of this approach.


title: Macroscopic description of preheating

abstract:
  We present a macroscopic model of the decay of a coherent classical scalar
field into statistical fluctuations through the process of parametric
amplification. We solve the field theory (henceforth,"microscopic") model to
leading order in a Large N expansion, and show that the macroscopic model gives
satisfactory results for the evolution of the field, its conjuguate momentum
and the energy momentum tensor of the fluctuations over many oscillations. The
macroscopic model is substantially simpler then the microscopic one, and can be
easily generalized to include quantum fluctuations. Although we assume here and
homogeneous situation, the model is fully covariant, and can be applied in
inhomogeneous cases as well. These features make this a promising model in
exploring the physics of preheating.


title: The MC@NLO 2.2 Event Generator

abstract:
  This is the user's manual of MC@NLO 2.2. This package is a practical
implementation, based upon the HERWIG event generator, of the MC@NLO formalism,
which allows one to incorporate NLO QCD matrix elements consistently into a
parton shower framework. Processes available in this version include the
hadroproduction of Higgs bosons, single vector bosons, vector boson pairs, and
heavy quark-antiquark pairs. This document is self-contained, but we emphasise
the main differences with respect to previous versions.


title: Radiative Corrections and the Universality of the Weak Interactions

abstract:
  We review the radiative corrections to superallowed Fermi transitions and
neutron beta decay in the Standard Model, and their relevance for the
universality of the Weak Interactions.


title: Parton distributions in the proton and pion

abstract:
  We use detailed balance for a hadron composed of quark and gluon Fock states
to obtain parton distributions in the proton and pion on the basis of a simple
statistical model.


title: Higgsless Theory of Electroweak Symmetry Breaking from Warped Space

abstract:
  We study a theory of electroweak symmetry breaking without a Higgs boson,
recently suggested by Csaki et al. The theory is formulated in 5D warped space
with the gauge bosons and matter fields propagating in the bulk. In the 4D dual
picture, the theory appears as the standard model without a Higgs field, but
with an extra gauge group G which becomes strong at the TeV scale. The strong
dynamics of G breaks the electroweak symmetry, giving the masses for the W and
Z bosons and the quarks and leptons. We study corrections in 5D which are
logarithmically enhanced by the large mass ratio between the Planck and weak
scales, and show that they do not destroy the structure of the electroweak
gauge sector at the leading order. We introduce a new parameter, the ratio
between the two bulk gauge couplings, into the theory and find that it allows
us to control the scale of new physics. We also present a potentially realistic
theory accommodating quarks and leptons and discuss its implications, including
the violation of universality in the W and Z boson couplings to matter and the
spectrum of the Kaluza-Klein excitations of the gauge bosons. The theory
reproduces many successful features of the standard model, although some
cancellations may still be needed to satisfy constraints from the precision
electroweak data.


title: DIS and "elastic" diffraction

abstract:
  The QCD-based generalized vector dominance-color-dipole picture (GVD-CDP)
provides a coherent picture of low-x DIS, deeply virtual Compton scattering and
light as wel as heavy vector-meson production.


title: Evidence for Solar Neutrino Flux Variability and its Implications

abstract:
  Althogh KamLAND apparently rules out Resonant-Spin-Flavor-Precession (RSFP)
as an explanation of the solar neutrino deficit, the solar neutrino fluxes in
the Cl and Ga experiments appear to vary with solar rotation. Added to this
evidence, summarized here, a power spectrum analysis of the Super-Kamiokande
data reveals significant variation in the flux matching a dominant rotation
rate observed in the solar magnetic field in the same time period. Three
frequency peaks, all related to this rotation rate, can be explained
quantitatively. A Super-Kamiokande paper reported no time variation of the
flux, but showed the same peaks, there interpreted as statistically
insignificant, due to an inappropriate analysis. This modulation is small (7%)
in the Super-Kamiokande energy region (and below the sensitivity of the
Super-Kamiokande analysis) and is consistent with RSFP as a subdominant
neutrino process in the convection zone. The data display effects that
correspond to solar-cycle changes in the magnetic field, typical of the
convection zone. This subdominant process requires new physics: a large
neutrino transition magnetic moment and a light sterile neutrino, since an
effect of this amplitude occurring in the convection zone cannot be achieved
with the three known neutrinos. It does, however, resolve current problems in
providing fits to all experimental estimates of the mean neutrino flux, and is
compatible with the extensive evidence for solar neutrino flux variability.


title:
Incident-Energy Dependence of the Effective Temperature in Heavy-Ion
  Collisions

abstract:
  We study the behaviour of the effective temperature for K$^+$ in several
energy domains. For this purpose, we apply the recently developed SPheRIO code
for hydrodynamics in 3+1 dimensions, using both Landau-type compact initial
conditions and spatially more spread ones. We show that initial conditions
given in small volume, like Landau-type ones, are unable to reproduce the
effective temperature together with other data (multiplicities and rapidity
distributions). These quantities can be reproduced altogether only when using a
large initial volume with an appropriate velocity distribution.


title: Jet calculus problems of the perturbative quantum chromodynamics

abstract:
  The perturbative quantum chromodynamics (pQCD) has been extremely successful
in the prediction and description of main properties of quark and gluon jets.
There are, however, some problems of the jet calculus with the higher order
corrections of the modified perturbative expansion which should be resolved to
get more precise statements. Some of them are discussed here.


title: Saturation regimes at LHC energies

abstract:
  The effects of saturation and unitarization for hadron-hadron scattering at
LHC energies are explored in several models. It is shown that different choices
of saturation parameters lead to sizable differences in the energy dependence
of total cross sections, and to dramatic changes in elastic differential cross
sections.


title: Double sneutrino inflation and its phenomenologies

abstract:
  In this paper we study double scalar neutrino inflation in the minimal
supersymmetric seesaw model in light of WMAP. Inflation in this model is
firstly driven by the heavier sneutrino field $\tilde{N}_2$ and then the
lighter field $\tilde{N}_1$. we will show that with the mass ratio $6\lesssim
M_2/M_1 \lesssim 10$ the model predicts a suppressed primordial scalar spectrum
around the largest scales and the predicted CMB TT quadrupole is much better
suppressed than the single sneutrino model. So this model is more favored than
the single sneutrino inflation model. We then consider the implications of the
model on the reheating temperature, leptogenesis and lepton flavor violation.
Our results show that the seesaw parameters are constrained strongly by the
reheating temperature, together with the requirement by a successful inflation.
The mixing between the first generation and the other two generations in the
right-handed neutrino sector is tiny. The rates of lepton flavor violating
processes in our scenario depend on only 4 unknown seesaw parameters through a
'reduced' seesaw formula, besides $U_{e3}$ and the supersymmetric parameters.
We find that the branching ratio of $\mu \to e \gamma$ is generally near the
present experimental limit, while ${\rm Br}(\tau \to \mu \gamma)$ is around
$\mathcal{O}(10^{-10} - 10^{-9})$.


title: The R-Parity Violating Minimal Supergravity Model

abstract:
  We present the minimal supersymmetric standard model with general broken
R-parity, focusing on minimal supergravity (mSUGRA). We discuss the origins of
lepton number violation in supersymmetry. We have computed the full set of
coupled one-loop renormalization group equations for the gauge couplings, the
superpotential parameters and for all the soft supersymmetry breaking
parameters. We provide analytic formule for the scalar potential minimization
conditions which may be iterated to arbitrary precision. We compute the
low-energy spectrum of the superparticles and the neutrinos as a function of
the small set of parameters at the unification scale in the general basis.
Specializing to mSUGRA, we use the neutrino masses to set new bounds on the
R-parity violating couplings. These bounds are up-to five orders of magnitude
stricter than the previously existing ones. In addition, new bounds on the
R-parity violating couplings are also derived demanding a non-tachyonic
sneutrino spectrum. We investigate the nature of the lightest supersymmetric
particle and find extensive regions in parameter space, where it is not the
neutralino. This leads to a novel set of supersymmetric signatures, which we
classify.


abstract:
  A constituent-quark (CQ) mapping of all the baryon and meson resonances is
listed for < 3000 MeV. The Isotopic Tables of the Baryons and Mesons (2003) are
based upon the CQ Model of M. H. Mac Gregor. Hadrons in boldface are
predictions of Mac Gregor. Hadrons in blue indicate rotational states.
Predicted hadrons and their spins are indicated in red color. Underlined
baryons indicate SU(3) decuplet for J = 3/2. The tables may be extended to
charmed and bottom baryons or mesons at a later date. The table for the baryons
is expanded to incorporate the recently discovered S = + 1 baryon. Additional
rotational states of baryons are predicted.


title:
Elastic and inelastic SU(3)-breaking final-state interactions in B
  decays to pseudoscalar mesons

abstract:
  We discuss all contributions from Zweig-rule-satisfying SU(3)-breaking final
state interactions (FSIs)in the B -> PP decays (neglecting charmed intermediate
states), where PP=pi pi, pi K, KK, pi eta (eta'), and K eta (eta'). First,
effects of SU(3) breaking in rescattering through Pomeron exchange are studied.
Then, after making a plausible assumption concerning the pattern of SU(3)
breaking in non-Pomeron FSIs, we give general formulas for how the latter
modify short-distance (SD) amplitudes. In the SU(3) limit, these formulas
depend on three effective parameters characterizing the strength of all
non-Pomeron rescattering effects. We point out that the experimental bounds on
the B -> K^+K^- branching ratio may limit the value of only one of these FSI
parameters. Thus, the smallness of the B -> K^+K^- decay rate does not imply
negligible rescattering effects in other decays. Assuming a vanishing value of
this parameter, we perform various fits to the available B -> PP branching
ratios. The fits determine the quark-diagram SD amplitudes, the two remaining
FSI parameters and the weak angle gamma. While the set of all B -> PP branching
ratios is well described with gamma around its expected SM value, the fits
permit other values of gamma as well. For a couple of such good fits, we
predict asymmetries for the B -> K pi, pi^+ eta (eta'), K^+ eta (eta') decays
as well as the values of the CP-violating parameters S_{pi pi} and C_{pi pi}
for the time-dependent rate of B^0(t) -> pi^+ pi^-. Apart from a problem with
the recent B^+ -> pi^+ eta asymmetry measurement, comparison with the data
seems to favour the values of gamma in accordance with SM expectations.


title: Gauge-Fermion Unification and Flavour Symmetry

abstract:
  After we study the 6-dimensional ${\cal N} = (1, 1)$ supersymmetry breaking
and $R$ symmetry breaking on $M^4\times T^2/Z_n$, we construct two ${\cal N} =
(1, 1)$ supersymmetric $E_6$ models on $M^4\times T^2/Z_3$ where $E_6$ is
broken down to $SO(10)\times U(1)_X$ by orbifold projection. In Model I, three
families of the Standard Model fermions arise from the zero modes of bulk
vector multiplet, and the $R$ symmetry $U(1)_F^{I} \times SU(2)_{{\bf 4}_-}$
can be considered as flavour symmetry. This may explain why there are three
families of fermions in the nature. In Model II, the first two families come
from the zero modes of bulk vector multiplet, and the flavour symmetry is
similar. In these models, the anomalies can be cancelled, and we have very good
fits to the SM fermion masses and mixings. We also comment on the ${\cal N}=(1,
1)$ supersymmetric $E_6$ models on $M^4\times T^2/Z_4$ and $M^4\times T^2/Z_6$,
SU(9) models on $M^4\times T^2/Z_3$, and SU(8) models on $T^2$ orbifolds.


title: Search for new physics at LHC

abstract:
  We review the search for new physics to be performed at the Large Hadron
Collider(LHC). Namely, we review the expectations for the Higgs boson,
supersymmetry and exotica detection at LHC. We also describe the main
parameters of the CMS and ATLAS detectors.


title: Group theoretical aspects of neutrino mixing in Quantum Field Theory

abstract:
  By resorting to recent results on the Quantum Field Theory of mixed
particles, we discuss some aspects of three flavor neutrino mixing. Particular
emphasis is given to the related algebraic structures and their deformation in
the presence of CP violation. A novel geometric phase related to CP violation
is introduced.


title: Quantum Field Theory of particle mixing and oscillations

abstract:
  We report on recent results on the Quantum Field Theory of mixed particles.
The quantization procedure is discussed in detail, both for fermions and for
bosons and the unitary inequivalence of the flavor and mass representations is
proved. Oscillation formulas exhibiting corrections with respect to the usual
quantum mechanical ones are then derived.


title: Exotic baryon multiplets at large number of colours

abstract:
  We generalize the usual octet, decuplet and exotic antidecuplet and higher
baryon multiplets to any number of colours Nc. We show that the multiplets fall
into a sequence of bands with O(1/Nc) splittings inside the band and
O(1)splittings between the bands characterized by "exoticness", that is the
number of extra quark-antiquark pairs needed to compose the multiplet. Each
time one adds a pair the baryon mass is increased by the same constant which
can be interpreted as a mass of a quark-antiquark pair. At the same time, we
prove that masses of exotic rotational multiplets are reliably determined at
large Nc from collective quantization of chiral solitons.


title: Higgs Radiation off Bottom Quarks at the Tevatron and the LHC

abstract:
  Higgs-boson production in association with bottom quarks, ppbar/pp -> b bbar
H + X, is one of the most important discovery channels for supersymmetric Higgs
particles at the Tevatron and the LHC. We have calculated the next-to-leading
order QCD corrections to the parton processes qqbar,gg -> bbbar H and present
results for total cross sections and for distributions in the transverse
momenta of the bottom quarks. The QCD corrections reduce the renormalization
and factorization scale dependence and thus stabilize the theoretical
predictions, especially when the Higgs boson is produced in association with
high-pT bottom quarks. The next-to-leading order predictions for the total
cross section are in reasonable numerical agreement with calculations based on
bottom-quark fusion bbbar ->H.


title: Low Energy Consequences of Five Dimensional SO(10)

abstract:
  We consider five dimensional (5D) supersymmetric SO(10) compactified on the
orbifold $S^1/(Z_2\times Z_2')$ such that the SO(10) gauge symmetry is broken
on both fixed points (branes), and the residual gauge symmetry is
$SU(3)_c\times SU(2)_L\times U(1)_Y\times U(1)_X$. We explore one example in
which the gauge symmetries on the two branes are respectively $SU(5)\times
U(1)_X$ and $SU(4)_c\times SU(2)_L\times SU(2)_R$, and the MSSM gauge symmetry
is recovered by the usual Higgs mechanism. We discuss how fermion masses and
mixings can be understood in this framework by introducing a flavor $U(1)_F$
symmetry. Unification of the MSSM gauge couplings and proton stability are also
considered. An order of magnitude increase in sensitivity could reveal proton
decay.


title: Large Nc and Chiral Dynamics

abstract:
  We study the dependence on the number of colors of the leading pi pi
scattering amplitude in chiral dynamics. We demonstrate the existence of a
critical number of colors for and above which the low energy pi pi scattering
amplitude computed from the simple sum of the current algebra and vector meson
terms is crossing symmetric and unitary at leading order in a truncated and
regularized 1/Nc expansion. The critical number of colors turns out to be Nc=6
and is insensitive to the explicit breaking of chiral symmetry.
  Below this critical value, an additional state is needed to enforce the
unitarity bound; it is a broad one, most likely of "four quark" nature.


title:
Study of the Linked Dipole Chain Model in heavy quark production at the
  Tevatron

abstract:
  We present calculations of charm and beauty production at Tevatron within the
framework of kT-factorization, using the unintegrated gluon distributions as
obtained from the Linked Dipole Chain model. The analysis covers transverse
momentum and rapidity distributions and the azimuthal correlations between b
and bbar quarks (or rather muons from their decay) which are powerful tests for
the different unintegrated gluon distributions. We compare the theoretical
results with recent experimental data taken by D0 and CDF collaborations at the
Tevatron Run I and II.


title: The Narrow Theta(1543)--A QCD Dilemma: Tube or Not Tube?

abstract:
  We argue that a width of less than MeV of the new Theta resonance is
inconsistent with the observed ratio of resonance and background events in the
various photon initiated experiments if the latter can be described by K, K*,
etc., exchange. An evaluation of the Feynman diagrams which were believed to be
relevant is presented and supports the general claim in the one case where a
cross section has been given by the experimental group.
  More detailed arguments based on the flux tube model explaining the narrow
widths and the apparent conflict with the production rates are presented. We
predict narrow Tetra-quarks at mass ~ O(1-1.2 GeV) which the analysis of LEAR
may have missed.


title:
Collins effect and single spin azimuthal asymmetries in the HERMES and
  COMPASS experiments

abstract:
  Predictions are made for single spin azimuthal asymmetries due to the Collins
effect in pion production from semi-inclusive deeply inelastic scattering off
transversely and longitudinally polarized targets for the HERMES and COMPASS
experiments. The x-dependence of the asymmetries is evaluated using the parton
distribution functions from the chiral quark-soliton model. The overall
normalization of the predicted asymmetries is determined by the information on
the Collins fragmentation function extracted from previous HERMES data on
azimuthal asymmetries from a longitudinally polarized target. The single spin
asymmetries from the transversely polarized proton target are found to be about
20% for positive and neutral pions both at HERMES and COMPASS. For a
longitudinally polarized target we obtain for COMPASS a sin(phi) asymmetry of
1% and a sin(2phi) asymmetry of about 3%.


title: New near-threshold mesons

abstract:
  We show that under a number of rather plausible assumptions QCD spectrum may
contain a number of mesons which have not been predicted or observed. Such
states will have the quantum numbers of two existing mesons and masses very
close to the dissociation threshold into the two mesons. Moreover, at least one
of the two mesonic constituents itself must be very close to its dissociation
threshold. In particular, one might expect the existence of loosely bound
systems of $D$ and $\D$; similarly, $K$ and $\ff$, $\bar{K}$ and $\ff$, $K$ and
$\aa$ and $\bar{K}$ and $\aa$ can be bound. The mechanism for binding in these
cases is the S-wave kaon exchange. The nearness of one of the constituents to
its decay threshold into a kaon plus a remainder, implies that the range of the
kaon exchange force becomes abnormally long--significantly longer than $1/m_K$
which greatly aids the binding.


title: Concept of Formation Length in Radiation Theory

abstract:
  The features of electromagnetic processes are considered which connected with
finite size of space region in which final particles (photon, electron-positron
pair) are formed. The longitudinal dimension of the region is known as the
formation length. If some external agent is acting on an electron while
traveling this distance the emission process can be disrupted. There are
different agents: multiple scattering of projectile, polarization of a medium,
action of external fields, etc. The theory of radiation under influence of the
multiple scattering, the Landau-Pomeranchuk-Migdal (LPM) effect, is presented.
The probability of radiation is calculated with an accuracy up to "next to
leading logarithm" and with the Coulomb corrections taken into account. The
integral characteristics of bremsstrahlung are given, it is shown that the
effective radiation length increases due to the LPM effect at high energy. The
LPM effect for pair creation is also presented. The multiple scattering
influences also on radiative corrections in a medium (and an external field
too) including the anomalous magnetic moment of an electron and the
polarization tensor as well as coherent scattering of a photon in a Coulomb
field. The polarization of a medium alters the radiation probability in soft
part of spectrum. Specific features of radiation from a target of finite
thickness include: the boundary photon emission, interference effects for thin
target, multi-photon radiation. The experimental study of LPM effect is
described. For electron-positron colliding beams following items are discussed:
the separation of coherent and incoherent mechanisms of radiation, the
beam-size effect in bremsstrahlung, coherent radiation and mechanisms of
electron-positron creation.


title: $B\Bbar$ mixing with the bulk fields in the Randall-Sundrum model

abstract:
  We calculate the $B\Bbar$ mixing in the Randall-Sundrum bulk model. In this
model, all the Standard Model fields except the Higgs can reside in the bulk.
Two suggestive models of "mixed" and "relaxed" scenarios are considered. We
find that the enhancement of the loop function is 0.51% for the "relaxed" and
1.07% for the "mixed" scenario when the first 4th KK modes are included, for a
bulk fermion mass parameter $\nu=-0.3$.


title: Preon Prophecies by the Standard Model

abstract:
  The Standard Model of quarks and leptons is, at first sight, nothing but a
set of {\it ad hoc} rules, with no connections, and no clues to their true
background. At a closer look, however, there are many inherent prophecies that
point in the same direction: {\it Compositeness} in terms of three stable
preons.


title: The problem of the U(1) axial symmetry and the chiral transition in QCD

abstract:
  We discuss the role of the U(1) axial symmetry for the phase structure of QCD
at finite temperature. In particular, supported by recent lattice results, we
analyse a scenario in which a U(1)-breaking condensate survives across the
chiral transition. This scenario can be consistently reproduced using an
effective Lagrangian model. The effects of the U(1) chiral condensate on the
slope of the topological susceptibility in the full theory with quarks are
studied. Further information on the new U(1) chiral order parameter is derived
from the study (at zero temperature) of the radiative decays of the light
pseudoscalar mesons in two photons.


title: Cosmology and CP Violation

abstract:
  We describe the role of CP violation in the generation of the baryon
asymmetry of the Universe, in the framework of baryogenesis through
leptogenesis, with emphasis on the possible relationship between CP violation
at low energies and that required by leptogenesis. It is emphasized that a
direct link between these two manifestations of CP violation only exists in the
framework of specific flavour structures for the fundamental leptonic mass
matrices.


title: Hadronic Matrix Elements for Kaons

abstract:
  We review some work done by us calculating matrix elements for Kaons.
Emphasis is put on the matrix elements which are relevant to predict
non-leptonic Kaon CP violating observables. In particular, we recall our
results for the \hat B_K parameter which governs the \bar{K^0}-K^0 mixing and
update our results for epsilon'_K including estimated all-higher-order CHPT
corrections and the new results from recent analytical calculations of the
\Delta I=3/2 component. Some comments on future prospects on calculating matrix
elements for Kaons are also added.


title: Experimental Review of Inclusive |Vub| Measurements

abstract:
  We review the status of inclusive |Vub| measurements where many new results
have become available recently.


title:
Neutrino Mass Patterns within the See-saw Model from Multi-localization
  along Extra Dimensions

abstract:
  We study a multi-localization model for charged leptons and neutrinos,
including the possibility of a see-saw mechanism. This framework offers the
opportunity to allow for realistic solutions in a consistent model without
fine-tuning of parameters, even if quarks are also considered. Those solutions
predict that the large Majorana mass eigenvalues for right-handed neutrinos are
of the same order of magnitude, although this almost common mass can span a
large range (bounded from above by $\sim 10^{12}{\rm GeV}$). The model also
predicts Majorana masses between $\sim 10^{-2}{\rm eV}$ and $\sim 5 \
10^{-2}{\rm eV}$ for the left-handed neutrinos, both in the normal and inverted
mass hierarchy cases. This mass interval corresponds to sensitivities which are
reachable by proposed neutrinoless double $\beta$ decay experiments. The
preferred range for leptonic mixing angle $\theta_{13}$ is: $10^{-2} \lesssim
\sin \theta_{13} \lesssim 10^{-1}$, but smaller values are not totally excluded
by the model.


title: |Vcb| and |Vub|: Theoretical Developments

abstract:
  The determinations of |Vcb| and |Vub| from semileptonic B decays are reviewed
with a critical discussion of the theoretical uncertainties and concentrating
on recent developments. Future prospects and limitations are also discussed.


title: SUSY Dark Matter and Quintessence

abstract:
  We investigate the enhancement of neutralino relic density in the context of
a realistic cosmological scenario with Quintessence. The accurate relic density
computation we perform allows us to be sensitive to both cases with shifts in
the abundance at the percent level, and to enhancements as large as 10^6. We
thoroughly analyze the dependence on the supersymmetric spectrum and on the
mass and composition of the lightest neutralino. We point out that
supersymmetric models yielding a wino or higgsino-like lightest neutralino
become cosmologically appealing in the presence of Quintessence.


title:
On CPT Symmetry: Cosmological, Quantum-Gravitational and other possible
  violations and their phenomenology

abstract:
  I discuss various ways in which CPT symmetry may be violated, and their
phenomenology in current or immediate future experimental facilities, both
terrestrial and astrophysical. Specifically, I discuss first violations of CPT
symmetry due to the impossibility of defining a scattering matrix as a
consequence of the existence of microscopic or macroscopic space-time
boundaries, such as Planck-scale Black-Hole (event) horizons, or cosmological
horizons due to the presence of a (positive) cosmological constant in the
Universe. Second, I discuss CPT violation due to breaking of Lorentz symmetry,
which may characterize certain approaches to quantum gravity, and third, I
describe models of CPT non invariance due to violations of locality of
interactions. In each of the above categories I discuss experimental
sensitivities. I argue that the majority of Lorentz-violating cases of CPT
breaking, with minimal (linear) suppression by the Planck-mass scale, are
already excluded by current experimental tests. There are however some
(stringy) models which can evade these constraints.


title:
Anomalous dimensions of twist-2 conformal operators in supersymmetric
  Wess-Zumino model

abstract:
  We are studying scale properties of twist-2 conformal operators in
supersymmetric Wess-Zumino model. In particular, we are interested in a
construction of multiplicatively renormalized conformal operators. We show,
that in order to find multiplicatively renormalized operators in this model, it
is sufficient to find multiplicatively renormalized operators only for one
member of operator supermultiplet. We found a closed analytical solution for
fermionic conformal operator, which together with supersymmetry transformations
could be used to find remained multiplicatively renormalized bosonic operators.
Moreover, we found, that the knowledge of fermionic diagonal and non-diagonal
anomalous dimensions matrices allows us completely reconstruct the forward
anomalous dimensions matrix in singlet case.


title: QCD strings with spinning quarks

abstract:
  We construct a consistent action for a massive spinning quark on the end of a
QCD string that leads to pure Thomas precession of the quark's spin. The string
action is modified by the addition of Grassmann degrees of freedom to the
string such that the equations of motion for the quark spin follow from
boundary conditions, just as do those for the quark's position.


title: Supersymmetric Color Superconductivity

abstract:
  Recent interest in novel phases in high density QCD motivates the study of
high density supersymmetric QCD (SQCD), where powerful exact results for
supersymmetric gauge theories can be brought to bear in the strongly coupled
regime. We begin by describing how a chemical potential can be incorporated
into a supersymmetric theory as a spurion vector superfield. We then study
supersymmetric SU(N_c) gauge theories with N_f flavors of quarks in the
presence of a baryon chemical potential mu, and describe the global symmetry
breaking patterns at low energy. Our analysis requires mu < Lambda and is thus
complementary to the variational approach that has been successful for mu <<
Lambda. We find that for N_f < N_c a modified U(1)_B symmetry is preserved,
analogous to the non-supersymmetric 2SC phase, whereas for N_f=N_c there is a
critical chemical potential above which the U(1)_B is broken, as it is in the
non-supersymmetric CFL phase. We further analyze the cases with N_c+1 <= N_f <
3/2 N_c and find that baryon number is broken dynamically for mu > mu_c. We
also give a qualitative description of the phases in the `conformal window',
3/2 N_c < N_f < 3N_c, at finite density.


title: Lattice Determination of Semileptonic Form Factors

abstract:
  We report on the Lattice determination of the semileptonic form factors by
lattice QCD. Comparison with the light-cone QCD sum rules are made for $\Btopi,
\Btorho$ semileptonic decays.


title:
QCD improved determination of the hadronic contribution to the anomalous
  magnetic moment of the muon

abstract:
  We present the results of a new evaluation of the anomalous magnetic moment
a_mu=(g_mu-2)/2 of the muon where the role of input data needed in the
evaluation is lowered in the interval between 1.2 and 3.0 GeV below charm
threshold. This is achieved by decreasing the size of the weight function in
the dispersion integral over the experimental ratio R(s) by subtracting a
polynomial from the weight function which mimics its energy dependence in that
given energy interval. In order to compensate for this subtraction, the same
polynomial weight integral is added again but is now evaluated on a circular
contour in the complex plane using QCD and global duality. For the hadronic
contribution to the shift in the anomalous magnetic moment of the muon we
obtain a_mu^had(LO) = (701.3 +/- 6.4) x 10^-10 at leading order in the
electromagnetic coupling. In addition, using the same procedure, we recalculate
the next-to-leading contribution a_mu^had(NLO) = (-10.3 +/- 0.2) x 10^-10.
Including QED, electroweak, and light-by-light contribution, we obtain a value
a_mu = (11 659 185.6 +/- 6.4_had +/- 3.5_LBL +/- 0.4_QED+EW) x 10^-10.


title:
External Operators and Anomalous Dimensions in Soft-Collinear Effective
  Theory

abstract:
  It has recently been argued that soft-collinear effective theory for
processes involving both soft and collinear partons contains a new
soft-collinear mode, which can communicate between the soft and collinear
sectors of the theory. The formalism incorporating the corresponding fields
into the effective Lagrangian is extended to include external current and
four-quark operators relevant to weak interactions. An explicit calculation of
the anomalous dimensions of these operators reveals that soft-collinear modes
are needed for correctly describing the ultraviolet behavior of the effective
theory.


title: In the debris of hadron interactions lies the beauty of QCD

abstract:
  Recent progress in understanding the strong physics regime of QCD is
described. The role played by condensates, particularly $q{\bar q}$, in
breaking chiral symmetry and generating constituent masses for $u$ and $d$
quarks is reviewed. The influence this has on hadrons with vacuum quantum
numbers is emphasised. What we know of this sector from recent data on
$\phi$-radiative decays and from $D$ decays to light hadrons is discussed. The
key to further understanding is comprehensive analyses of such data, including
that planned for Hall D at Jefferson Laboratory.


title:
Selected Theoretical Issues in B-meson Physics: CKM matrix and
  Semileptonic Decays

abstract:
  These notes are a written version of a lecture given at the International
Seminar {\it Modern Trends and Classical Approach} devoted to the 80$^{th}$
anniversary of Prof. Karen Ter-Martirosyan, ITEP September 30 -- October 1,
2002. The notes represent a non-technical review of our present knowledge on
the phenomenology of weak decays of quarks, and their r\^ole in the
determination of the parameters of the Standard Model. They are meant as an
introduction to some of the latest results and applications in the field.
Specifically, we focus on CP violation in B-decays and the determination of the
CKM matrix element $V_{cb}$ from semileptonic decays of $B$ mesons. We also
briefly discuss phenomenological applications concerning the electron-energy
spectra in semileptonic $B$ and $B_c$ decays.


title:
Electroweak 2 -> 2 amplitudes for electron-positron annihilation at TeV
  energies

abstract:
  The non-radiative scattering amplitudes for electron-positron annihilation
into quark and lepton pairs in the TeV energy range are calculated in the
double-logarithmic approximation. The expressions for the amplitudes are
obtained using infrared evolution equations with different cut-offs for virtual
photons and for W and Z bosons, and compared with previous results obtained
with an universal cut-off.


title: Chiral Symmetry Breaking and Scalar Confinement

abstract:
  We address the old difficulty in accommodating the scalar quark-antiquark
confining potential together with chiral symmetry breaking. We develop a quark
confining potential inspired in the QCD scalar flux tube. The coupling to
quarks consists in a double vector vertex. We study the Dirac and spin
structure of this potential. In the limit of massless quarks the quark vertex
is vector. Nevertheless symmetry breaking generates a new scalar quark vertex.
In the heavy quark limit the coupling is mostly scalar. We solve the mass gap
equation and find that this potential produces spontaneous chiral symmetry
breaking for light quarks. The quantitative results of this model are
encouraging.


title: Violation of Angular Momentum Selection Rules in Quantum Gravity

abstract:
  A simple consequence of the angular momentum conservation in quantum field
theories is that the interference of s-channel amplitudes exchanging particles
with different spin J vanishes after complete angular integration. We show
that, while this rule holds in scattering processes mediated by a massive
graviton in Quantum Gravity, a massless graviton s-channel exchange breaks
orthogonality when considering its interference with a scalar-particle
s-channel exchange, whenever all the external states are massive. As a
consequence, we find that, in the Einstein theory, unitarity implies that
angular momentum is not conserved at quantum level in the graviton coupling to
massive matter fields. This result can be interpreted as a new anomaly,
revealing unknown aspects of the well-known van Dam - Veltman - Zakharov
discontinuity.


title: The Higgs Penguin and its Applications : An overview

abstract:
  We review the effective Lagrangian of the Higgs penguin in the Standard Model
and its minimal supersymmetric extension (MSSM). As a master application of the
Higgs penguin, we discuss in some detail the B-meson decays into a
lepton-antilepton pair. Furthermore, we explain how this can probe the Higgs
sector of the MSSM provided that some of these decays are seen at Tevatron Run
II and B-factories. Finally, we present a complete list of observables where
the Higgs penguin could be strongly involved.


title: Structure of the nucleon in chiral perturbation theory

abstract:
  We discuss a renormalization scheme for relativistic baryon chiral
perturbation theory which provides a simple and consistent power counting for
renormalized diagrams. The method involves finite subtractions of dimensionally
regularized diagrams beyond the standard modified minimal subtraction scheme of
chiral perturbation theory to remove contributions violating the power
counting. This is achieved by a suitable renormalization of the parameters of
the most general effective Lagrangian. As applications we discuss the mass of
the nucleon, the $\sigma$ term, and the scalar and electromagnetic form
factors.


title: Supersymmetry Working Group: Summary Report

abstract:
  This report summarizes the progress in SUSY studies performed during the
Extended ECFA/DESY Workshop since the TESLA TDR. Based on accurate future
measurements of masses of SUSY particles and the determination of the couplings
and mixing properties of sfermions and gauginos, we discuss how the low-energy
Lagrangian parameters can be determined. In a bottom-up approach, by
extrapolating to higher energies, we demonstrate how model assumptions on SUSY
breaking can be tested. To this end precise knowledge of the SUSY spectrum and
the soft SUSY breaking parameters is necessary to reveal the underlying
supersymmetric theory.


title: On the Measurement of Solar Neutrino Oscillation Parameters with KamLAND

abstract:
  A new reactor power plant Shika-2, with a power of approximately 4 GW and at
a distance of about 88 km from the KamLAND detector is scheduled to start
operating in March 2006. We study the impact of the $\bar\nu_e$ flux from this
reactor on the sensitivity of the KamLAND experiment to the solar neutrino
oscillation parameters. We present results on prospective determination of
$\Delta m^2_\odot$ and $\sin^2\theta_\odot$ using the combined data from
KamLAND and the solar neutrino experiments, including the effect of the Shika-2
contribution to the KamLAND signal and the latest data from the salt enriched
phase of the SNO experiment. We find that contrary to the expectations, the
addition of the Shika-2 reactor flux does not improve the $\sin^2\theta_\odot$
sensitivity of KamLAND, while the ambiguity in $\Delta m^2_\odot$ measurement
may even increase, as a result of the averaging effect between Kashiwazaki and
the Shika-2 reactor contributions to the KamLAND signal.


title: The flavour problem and family symmetry

abstract:
  We show how two different family symmetries can be used to address the
flavour problem in SO(10)-like models. The first is based on a gauged $U(1)_F$,
whose problems dissappear in the context of a type I string model embedding.
The second is based on $SU(3)_F$, the maximal family group consistent with
SO(10); in this case the family symmetry is more constaining, so we merely look
at it in the context of a supersymmetric field theory


title: Status of observational cosmology and inflation

abstract:
  We review the latest developments in the determination of the cosmological
parameters from the measurement of the Cosmic Microwave Background Radiation
(CMBR) anisotropies and of the Large Scale Structure (LSS) of the Universe. We
comment finally on the implications for the primordial spectrum and the
consequences for inflationary models.


title:
Analysis of Super-Kamiokande 5-day Measurements of the Solar Neutrino
  Flux

abstract:
  Data in 5-day bins, recently released by the Super-Kamiodande Consortium, has
been analyzed by a likelihood procedure that has certain advantages over the
Lomb-Scargle procedure used by the consortium. The two most prominent peaks in
the power spectrum of the 10-day data were at 9.42 y-1 and 26.57 y-1, and it
was clear that one was an alias of the other caused by the regularity of the
binning. There were reasons to believe that the 9.42 y-1 peak was an alias of
the 26.57 y-1 peak, but analysis of the 5-day data makes it clear that the
reverse is the case. In addition to a strong peak near 9.42 y-1, we find peaks
at 43.72 y-1and at 39.28 y-1. After comparing this analysis with a
power-spectrum analysis of magnetic-field data, we suggest that these three
peaks may be attributed to a harmonic of the solar rotation rate and to an
r-mode oscillation with spherical harmonic indices l = 2, m = 2.


title:
The electromagnetic vertex of neutrinos in an electron background and a
  magnetic field

abstract:
  We study the electromagnetic vertex function of a neutrino that propagates in
an electron background in the presence of a static magnetic field. The
structure of the vertex function under the stated conditions is determined and
it is written down in terms of a minimal and complete set of tensors. The
one-loop expressions for all the form factors is given, up to terms that are
linear in the magnetic field, and the approximate integral formulas that hold
in the long wavelength limit are obtained. We discuss the physical
interpretation of some of the form factors and their relation with the concept
of the neutrino induced charge. The neutrino acquires a longitudinal and a
transverse charge, due to the fact that the form factors depend on the
transverse and longitudinal components of the photon momentum independently. We
compute those form factors explicitly in various limiting cases and find that
the longitudinal and transverse charge are the same for the case of a
non-relativistic electron gas, but not otherwise.


title: CLEO Determinations of Vcb from Inclusive Moments

abstract:
  Moments of B -> X l nu and B -> Xs gamma decays can determine nonperturbative
QCD parameters that relate the semileptonic decay width to Vcb. CLEO pioneered
measurement of these moments, determined the relevant QCD parameters from the
measured moments, and used these parameters to determine Vcb.


title:
The properties of the $\sigma$ and $\kappa$ resonances in a new
  unitarization approach

abstract:
  A new unitarization approach is discussed and applied to study the elastic
$\pi K$ scattering process. The existence of the light $\kappa$ resonance is
firmly established if the scattering length in the I=1/2 channel does not
deviate too much from its value obtained from chiral perturbation theory, and a
precise determination to the mass and width of the $\kappa$ resonance requires
a precise determination of the scattering length parameter.


title: Influence of a Z+(1540) resonance on K+N scattering

abstract:
  The impact of a (I=0, J^P=1/2^+) Z^+(1540) resonance with a width of 5 MeV or
more on the K+N (I=0) elastic cross section and on the P01 phase shift is
examined within the KN meson-exchange model of the Juelich group. It is shown
that the rather strong enhancement of the cross section caused by the presence
of a Z^+ with the above properties is not compatible with the existing
empirical information on KN scattering. Only a much narrower Z^+ state could be
reconciled with the existing data -- or, alternatively, the Z^+ state must lie
at an energy much closer to the KN threshold.


title: Surprises in Bose-Einstein correlations

abstract:
  Four experimental results, which seem to contradict the established ideas
about the Bose-Einstein correlations in multiple particle production processes,
are briefly presented and dicussed.


title:
The possibility of a sizable, direct CP-violating asymmetry in B^-+ ->
  K^-+ eta

abstract:
  The likelihood of a sizable, direct CP-violating asymmetry in the decays
$B^\mp\to K^\mp\eta$, is calculated within the framework of the model which
originally predicted a sizeable asymmetry in $\pi^\mp\eta(\eta')$. It is shown
in a transparent manner that these decays are the best places for providing the
first clear evidence for direct CP violation in the decays of a charged
particle. These decays contain two amplitudes of comparable magnitude, with
different weak-interaction phase, and with different strong-interaction phase
which is explicitly calculated in a model of three coupled channels of physical
hadrons.


title: Sivers function in a spectator model with axial-vector diquarks

abstract:
  We perform a calculation of the Sivers function in a spectator model of the
nucleon, with scalar and axial-vector diquarks. We make use of gluon
rescattering to produce the nontrivial phases necessary to generate the Sivers
function. The inclusion of axial-vector diquarks enables us to obtain a nonzero
Sivers function for down quarks. Using the results of our model, we discuss the
phenomenology of transvere single spin asymmetries in pi+, pi-, and pi0
production, which are currently analysed by the HERMES and COMPASS
collaborations. We find that the inclusion of axial-vector diquarks
substantially reduces the asymmetries.


title: The baryonic Y-shape confining potential energy and its approximants

abstract:
  We discuss the validity of replacing the complicated three-body confinement
operator of the Y string junction type by three kinds of approximation which
are numerically much simpler to handle: a one-body operator with the junction
point at the centre of mass, a two-body operator corresponding to half the
perimeter of the triangle formed by the three particles, and the average of
both. Two different approaches for testing the quality of the approximations
are proposed: a geometrical treatment based on the comparison of the potential
energy strengths for the various inter quark distances, and a dynamical
treatment based on the comparison of the corresponding effective string
tensions using a hyperspherical approach. Both procedures give very similar
results. It is shown how to simulate the genuine string junction operator by
the approximations proposed above. Exact three-body calculations are presented
in order to compare quantitatively the various approximations and to confirm
our analysis.


title: Chiral dynamics with strange quarks

abstract:
  In the first part of the talk, I review what we know (or rather do not know)
about the structure of the QCD vacuum in the presence of strange quarks. Chiral
perturbation theory allows to study reactions of pions and kaons and to further
sharpen our understanding of symmetry violation in QCD. I review recent
progress on the description of pion-kaon scattering, in particular concerning
isospin violation and the extraction of threshold and resonance parameters from
Roy-Steiner equations. In the third part, it is shown how a unitary extension
of chiral perturbation theory leads to novel insight into the structure of the
Lambda(1405).


title: A Parametrization for the Neutrino Mixing Matrix

abstract:
  We propose a flexible and model independent parametrization of the neutrino
mixing matrix, which takes advantage of the fact that there are up to three
small quantities in neutrino mixing phenomenology: (i) the deviation from
maximal mixing of solar neutrinos, (ii) the mixing matrix element U_{e3} and
(iii) the deviation from maximal mixing of atmospheric neutrinos. It is
possible to quantify those three observations with a parameter \lambda \sim
0.2, which appears at least linearly in all elements of the mixing matrix. The
limit \lambda -> 0 corresponds to exact bimaximal mixing. Present and future
experiments can be used to pin down the power of \lambda required to usefully
describe the observed phenomenology. Observing that the ratio of the two
measured mass squared differences is roughly \lambda^2 allows to further study
the structure of the Majorana mass matrix. We comment on the implications of
this parametrization for neutrinoless double beta decay and on the oscillation
probabilities in long-baseline experiments.


title: Subthreshold photoproduction of charm

abstract:
  Charm photoproduction rates off nuclei below the nucleon threshold are
estimated using the phenomenologically known structure functions both for x>1
and x<1. The rates rapidly fall below the threshold from values of the order 10
pb for Pb close to the threshold (at 7.5 GeV) down to values of the order 1 pb
at 6 GeV.


title:
Code generation (automatized programming) of symbolic formulae for
  helicity amplitudes

abstract:
  We propose a project for automatic representation and evaluation of helicity
amplitudes we started to develop and explain it's main functioning principles.


title: Seesaw Mechanism in Warped Geometry

abstract:
  We show how the seesaw mechanism for neutrino masses can be realized within a
five dimensional (5D) warped geometry framework. Intermediate scale standard
model (SM) singlet neutrino masses, needed to explain the atmospheric and solar
neutrino oscillations, are shown to be proportional to M_Pl\exp((2c-1)\pi kR),
where c denotes the coefficient of the 5D Dirac mass term for the singlet
neutrino which also has a Planck scale Majorana mass localized on the
Planck-brane, and kR~11 in order to resolve the gauge hierarchy problem. The
case with a bulk 5D Majorana mass term for the singlet neutrino is briefly
discussed.


title: The D*0 D0bar threshold resonance

abstract:
  Tests are discussed to distinguish c cbar, hybrid charmonium and molecular
interpretations of the narrow Belle resonance at 3872 MeV.


title: Exotic Q=-1/3 Quark Signatures at High-Energy Hadron Colliders

abstract:
  Isosinglet vector-like quarks are predicted by some unified theories of
electroweak and strong interactions. We study hadron collider signatures for
the production and decay of isosinglet vector-like quarks with charge -1/3.
Previous analyses of Run I data from the Fermilab Tevatron are used to set
lower limits of 100--200 GeV/c^2 on the mass of such quarks, depending on
assumptions about mixing with Standard Model quarks and the mass of the Higgs
boson. For future Tevatron data (E_{c.m.} = 1.96 TeV) the corresponding mass
range is (100-270, 100-320) GeV/c^2 for (1, 10) fb^{-1}. At the CERN Large
Hadron Collider (LHC) (E_{c.m.} = 14 TeV, 100 fb^{-1}), an analysis of
flavor-changing neutral-current decay modes should probe an $h$ quark mass
range of 100-1100 GeV/c^2.


title: Non-universal gauge bosons $Z^{\prime}$ and rare top decays

abstract:
  We study a new method for detecting non-universal gauge bosons $Z'$ via
considering their effects on rare top decays. We calculate the contributions of
the non-universal gauge bosons $Z'$ predicted by topcolor-assisted technicolor
(TC2) models and flavor-universal TC2 models on the rare top decays
$t\longrightarrow cV(V=g,\gamma,Z)$ and $t\longrightarrow cl_{i}l_{j}(l_{i},
l_{j}=\tau, \mu$, or $e)$. We show that the branching ratios of these processes
can be significantly enhanced. Over a sizable region of the parameter space, we
have $Br(t\longrightarrow cg)\sim10^{-5}$ and $Br(t\longrightarrow
c\tau\tau)\sim10^{-7}$, which may approach the observable threshold of near
future experiments. Non-universal gauge bosons $Z'$ may be detected via the
rare top decay processes at the top-quark factories such as the CERN LHC.


title: Auxiliary fields and hadron dynamics

abstract:
  The relations existing between the auxiliary field (einbein field) formalism
and the spinless Salpeter equation are studied in the case of two particles
with the same mass, interacting via a confining potential. The problem of
non-orthogonality for radial excited states in the auxiliary field formalism is
discussed and found to be non-crucial. It is shown that the classical equations
of motion of the rotating string model, derived from the QCD lagrangian, reduce
exactly to the classical equations of motion of the phenomenological
semirelativistic flux tube model, provided all auxiliary fields are eliminated
correctly from the rotating string hamiltonian.


title: Neutral kaons in random media

abstract:
  The generalized dynamics describing the propagation of neutral kaons in
randomly fluctuating media is derived and analyzed. It takes into account
possible matter-induced effects leading to loss of phase coherence and
dissipation. The study of selected neutral kaon observables indicates that
these non-standard effects are amenable to a direct experimental analysis.


title:
Polarized parton distribution functions in the valon model framework,
  using QCD fits to Bernstein polynomials

abstract:
  In this paper polarized valon distribution is derived from unpolarized valon
distribution. In driving polarized valon distribution some unknown parameters
exist which must be determined by fitting to experimental data. Here we have
used Bernstein polynomial method to fit QCD predictions for the moments of
$g_1^p$ structure function, to suitably the constructed appropriate average
quantities of the E143 and SMC experimental data. After calculating polarized
valon distributions and all parton distributions in a valon, polarized parton
density in a proton are available. The results are used to evaluate the spin
components of proton. It turns out that the results of polarized structure
function are in good agreement with all available experimental data on
$g_{1}^p$ of proton.


title:
Centrality-dependence of Particle Production at RHIC and the
  Combinational Approach

abstract:
  The newly proposed combinational approach, called the grand combinational
model (GCM), as would be described in detail in the text, is still under our
careful scrutiny. By applying it, we have attempted to analyze here the
characteristics of both the transverse momentum($p_{\rm{T}}$)-, and
centrality-dependence of production of the main varieties of the secondaries
measured in $AuAu$ collisions at BNL-RHIC at both $\sqrt{s_{\rm{NN}}}=130$ GeV
and $\sqrt{s_{\rm{NN}}}=200$ GeV by PHENIX Collaboration. Besides, with the
help of it, we have also investigated the nature of centrality-dependence of
the average transverse momenta of the various major categories of particles in
$AuAu$ collisions at RHIC. The model seems to survive quite smoothly the acid
tests of the latest PHENIX data, as it accommodates data modestly well on these
twin aspects. The study reveals a kind of universality of nature of the
hadronic secondaries and also of the basic particle and nuclear interactions at
high energies. However, in the end, we precisely point out both the strengths
and limitations of the specific model under consideration here.


title: CP violation at a linear collider with transverse polarization

abstract:
  We show how transverse beam polarization at $e^+e^-$ colliders can provide a
novel means to search for CP violation by observing the distribution of a
single final-state particle without measuring its spin. We suggest an azimuthal
asymmetry which singles out interference terms between standard model
contribution and new-physics scalar or tensor effective interactions in the
limit in which the electron mass is neglected. Such terms are inaccessible with
unpolarized or longitudinally polarized beams. The asymmetry is sensitive to CP
violation when the transverse polarizations of the electron and positron are in
opposite senses. The sensitivity of planned future linear colliders to
new-physics CP violation in $e^+e^- \to t \bar{t}$ is estimated in a
model-independent parametrization. It would be possible to put a bound of $\sim
7$ TeV on the new-physics scale $\Lambda$ at the 90% C.L. for $\sqrt{s}=500$
GeV and $\int dt {\cal L}=500 {\rm fb}^{-1}$, with transverse polarizations of
80% and 60% for the electron and positron beams, respectively.


title: Hard non-vacuum reggeon in the CKMT model

abstract:
  The CKMT model describing the nucleon structure function $F_2(x,Q^2)$ in the
framework of conventional Regge theory with smooth soft-hard pomeron is
modified. Smooth soft-hard non-vacuum reggeon dependence on incoming photon
virtuality $Q^2$ is introduced. This dependence has the same functional form as
the smooth soft-hard functional $Q^2$ dependence for pomeron in original CKMT
model. In regeon of low $W^2$ better agreement with experimental data is
observed.


title:
Estimate of the three-loop contribution to the QCD static potential from
  renormalon cancellation

abstract:
  It had been known that the Borel transforms of the twice quark pole mass 2*mq
and of the QCD q-barq static potential V(r) have leading infrared renormalons
at b=1/2 such that they cancel in the sum. The renormalon residue of 2*mq had
been determined with reasonably high precision from the known perturbative
coefficients of the ratio mq/(bar mq), where (bar mq) is the barMS
renormalon-free mass of the quark q. These values of the residues are used here
to estimate the hitherto unknown part of the three-loop coefficient of the
static potential V(r). Further, the method takes into account the fact that the
ultrasoft energy regime contributions must be excluded from the analysis. In
the b-barb quarkonium, aforementioned estimated part of the three-loop term
turns out to give a contribution to the binding energy comparable to the
nonpertubative contribution.


title: Neutrino in Astrophysics and Cosmology

abstract:
  At first we introduce the Neutrino in the standard Model, then the Dirac and
Majorana Masses. After introducing the See-Saw Mechanism, we discuss the
neutrino oscillations and the neutrino in astrophysics and cosmology. We finish
this paper with a brief summary of the neutrino experiments.


title: Joint Resummation for Higgs Production

abstract:
  We study the application of the joint resummation formalism to Higgs
production via gluon-gluon fusion at the LHC, defining inverse transforms by
analytic continuation. We work at next-to-leading logarithmic accuracy. We find
that at low Q_T the resummed Higgs Q_T distributions are comparable in the
joint and pure-Q_T formalisms, with relatively small influence from threshold
enhancement in this range. We find a modest (about ten percent) decrease in the
inclusive cross section, relative to pure threshold resummation.


title: The enhancement of inflaton loops in an alpha-vacuum

abstract:
  While inflaton loops in the Euclidean vacuum generally have a negligible
contribution to the power spectrum, loop effects can be substantially larger
when the inflaton is in a non-thermal vacuum state. As an example, we show that
in a truncated alpha-vacuum these loop effects are enhanced by the ratio of the
Planck scale to the Hubble scale during inflation. The details of the
inflationary models determine whether the coupling constants suppress the loop
corrections relative to the tree level result.


title: Solar Neutrinos from CNO Electron Capture

abstract:
  The neutrino flux from the sun is predicted to have a CNO-cycle contribution
as well as the known pp-chain component. Previously, only the fluxes from beta+
decays of 13N, 15O, and 17F have been calculated in detail. Another neutrino
component that has not been widely considered is electron capture on these
nuclei. We calculate the number of interactions in several solar neutrino
detectors due to neutrinos from electron capture on 13N, 15O, and 17F, within
the context of the Standard Solar Model. We also discuss possible non-standard
models where the CNO flux is increased.


title:
Sensitivity to $\theta_{13}$ and $\delta$ in the Decaying Astrophysical
  Neutrino Scenario

abstract:
  We have previously shown that the decay of high-energy neutrinos from distant
astrophysical sources would be revealed by flavor ratios that deviate strongly
from the $\phi_{\nu_e}:\phi_{\nu_\mu}:\phi_{\nu_\tau} = 1:1:1$ expected from
oscillations alone. Here we show that the deviations are significantly larger
when the mixing angle $\theta_{13}$ and the CP phase $\delta$ are allowed to be
nonzero. If neutrinos decay, this could allow measurement of $\theta_{13}$ and
$\delta$ in IceCube and other near-term neutrino telescopes.


title: The structure of $f_0(980)$ from charmed mesons decays

abstract:
  We use the QCD sum rules to evaluate the form factors associated with the
semileptonic decays of $D_s$ and $D$ mesons into $f_0(980)$. We consider the
$f_0(980)$ meson as a quark-antiquark state with a mixture of strange and light
components. The decay rates are evaluated in terms of the mixing angle. Using
the same form factors to evaluate nonleptonic decays in the framework of the
factorization approximation we conclude that the importance of the light quarks
in $f_0(980)$ is not negligible.


title: Chromodynamic Lensing and $\perp$ Single Spin Asymmetries

abstract:
  The physical interpretation of generalized parton distributions (in the limit
$\xi=0$) as Fourier transforms of impact parameter dependent parton
distributions is discussed. Particular emphasis is put on the role of the
target polarization. For transversely polarized targets we expect a significant
deviation from axial symmetry for the distribution in the transverse plane. We
conjecture that this transverse distortion, in combination with the final state
provides a natural explanation for the sign of the Sivers contribution to
semi-inclusive single-spin asymmetries.


title:
Evaluating The Two Loop Diagram Responsible For Neutrino Mass In Babu's
  Model

abstract:
  Babu studied the neutrino spectrum obtained when one adds a charged singlet
and a doubly charged singlet to the standard model particle spectrum. It was
found that the neutrinos acquire a mass matrix at the two-loop level which
contains one massless eigenstate. The mass matrix of Babu's model depends on an
integral over the undetermined loop momenta. We present the exact calculation
of this integral.


title: Penta-quark baryon from the QCD Sum Rule

abstract:
  Exotic penta-quark baryon with strangeness +1, \Theta^+, is studied in the
QCD sum rule approach. We derive sum rules for the positive and negative parity
baryon states with J=1/2 and I=0. It is found that the standard values of the
QCD condensates predict a negative parity \Theta^+ of mass \simeq 1.5 GeV,
while no positive parity state is found. We stress the roles of chiral-odd
condensates in determining the parity and mass of \Theta^+.


title:
Assignments of Universal Texture Components for Quark and Lepton Mass
  Matrices

abstract:
  We reanalyze the mass matrices model of quarks and leptons which gives a
unified description of quark and lepton mass matrices with the same texture
form. By investigating possible types of the assignment for the texture's
components of this mass matrix form, we find that a different assignment for
up-quarks from one for down-quarks can lead to consistent values of CKM mixing
matrix. This finding overcomes a weak point of the previous analysis of the
model. We also obtain some relations among the CKM mixing matrix parameters,
which are independent of evolution effects.


title:
One-pion-exchange final-state-interaction and the pbar p near threshold
  enhancement in J/psi -> gamma pbar p decays

abstract:
  For the Nbar N system, the one-pion-exchange (OPE) interaction gives the
largest attractive force for Nbar N with isospin I=0 and spin S=0, while a near
threshold enhancement was observed for pbar p with I=0 and S=0 in J/psi ->
gamma pbar p decays. With a K-matrix approach, we find that the OPE
final-state-interaction (FSI) makes an important contribution to the
near-threshold enhancement in the pbar p mass spectrum in J/psi -> gamma pbar p
decays.


title:
Radiative corrections to Higgs-boson production in association with
  top-quark pairs at e+ e- colliders

abstract:
  We have calculated the complete O(alpha) and O(alpha_s) radiative corrections
to the Higgs-production process e+ e- -> t anti-t H in the Standard Model. This
process is particularly interesting for the measurement of the top-quark Yukawa
coupling at a future e+ e- collider. The calculation of the O(alpha)
corrections is described in some detail including, in particular, the treatment
of the soft and collinear singularities. The discussion of numerical results
focuses on the total cross section as well as on angular and energy
distributions of the outgoing particles. The electroweak corrections turn out
to be sizable and can reach the order of +/-10%. They result from cancellations
between electromagnetic, fermionic, and weak bosonic corrections, each of which
are of the order of +/-10%.


title: AdS/CFT-Inspired Unification at About 4 TeV

abstract:
  The use of the AdS/CFT correspondence to arrive at quiver gauge field
theories is discussed, focussing on the orbifolded case without supersymmetry.
An abelian orbifold with the finite group Z(12) can accommodate unification at
about 4 TeV.


title: Rare fluctuations and the high-energy limit of the S-matrix in QCD

abstract:
  We argue that one cannot correctly calculate the elastic scattering S-matrix
for high-energy dipole-dipole scattering, in the region where S is small,
without taking fluctuations into account. The relevant fluctuations are rare
and unimportant for general properties of inelastic collisions. We find that
the Kovchegov equation, while giving the form of the S-matrix correctly, gives
the exponential factor twice as large as the result which emerges when
fluctuations are taken into account.


title: Heating the O(N) nonlinear sigma model

abstract:
  The thermodynamics of the O(N) nonlinear sigma model in 1+1 dimensions is
studied. We calculate the finite temperature effective potential in leading
order in the 1/N expansion and show that at this order the effective potential
can be made finite by temperature independent renormalization. We will show
that this is not longer possible at next-to-leading order in 1/N. In that case
one can only renormalize the minimum of the effective potential in a
temperature independent way, which gives us finite physical quantities like the
pressure.


title: Enhanced Nonperturbative Effects in Z Decays to Hadrons

abstract:
  We use soft collinear effective field theory (SCET) to study nonperturbative
strong interaction effects in Z decays to hadronic final states that are
enhanced in corners of phase space. These occur, for example, in the jet energy
distribution for two jet events near E_J=M_Z/2, the thrust distribution near
unity and the jet invariant mass distribution near zero. The extent to which
such nonperturbative effects for different observables are related is
discussed.


title: The BABAR Resonance as a Four-quark Meson

abstract:
  By assigning the narrow scalar resonance (which has been recently observed at
the B-factories) to one of iso-triplet four-quark mesons containing a charm
quark, two body decays of the four-quark mesons are studied. It is predicted
that some of them can be observed as narrow resonances.


title:
The scalar sector of the $SU(3)_{c}\otimes SU(3)_{L}\otimes U(1)_{X}$
  model

abstract:
  A complete study of the Higgs sector of the $SU(3)_{c}\otimes
SU(3)_{L}\otimes U(1)_{X}$ model is carried out, obtaining all possible cases
of vacuum expectation values that permit the spontaneous symmetry breaking
pattern$ SU(3)_{L}\otimes U(1)_{X}\to SU(2)_{L}\otimes U(1)_{Y}\to U(1)_{Q}.$
We find the most general Higgs potentials that contain three triplets of Higgs
and one sextet. A detailed study of the scalar sector for different models with
three Higgs triplets is done. The models end up in an electroweak two Higgs
doublet model after the first symmetry breakdown; we find that the low energy
limit depends on a trilinear parameter of the Higgs potential, and that the
decoupling limit from the electroweak two Higgs doublet model to the minimal
standard model can be obtained quite naturally.


title: Perturbative Odderon in the Dipole Model

abstract:
  We show that, in the framework of Mueller's dipole model, the perturbative
QCD odderon is described by the dipole model equivalent of the BFKL equation
with a $C$-odd initial condition. The eigenfunctions and eigenvalues of the
odderon solution are the same as for the dipole BFKL equation and are given by
the functions $E^{n,\nu}$ and $\chi (n,\nu)$ correspondingly, where the $C$-odd
initial condition allows only for odd values of $n$. The leading high-energy
odderon intercept is given by $\alpha_{odd} - 1 = \frac{2 \as N_c}{\pi} \chi
(n=1 ,\nu=0) = 0$ in agreement with the solution found by Bartels, Lipatov and
Vacca. We proceed by writing down an evolution equation for the odderon
including the effects of parton saturation. We argue that saturation makes the
odderon solution a decreasing function of energy.


title:
Searching for new physics in the angular distribution of B^0 -> phi K^*
  decay

abstract:
  Motivated by the possible discrepancy between the observed CP asymmetry and
that of standard model expectation in the decay mode B^0 -> phi K_S, we study
the corresponding vector vector decay mode B^0 -> phi K^*. In order to obtain
decisive information regarding the CP violating effect, we made the angular
distribution analysis of the decay products, where both the outgoing vector
mesons decay into two pseudoscalars. Furthermore, we study the possible effects
of new physics using the angular distribution observables.


title:
Some comments on narrow resonances D_{s_1}^* (2.46GeV/c^2) and D_{s0}
  (2.317GeV/c^2)

abstract:
  The newly observed resonances D_{s_{1}}^* and D_{s_0} are discussed in a
potential model. The relationship between the mass difference between p-states
D_{s_1}^*(1^+), D_{s_0}(0^+) and s-states D_s^*(1^-), D_s(0^-) is also
examined. Some remarks about the state D_1^*(1^+) and D_0(0^+) in the non-
strange sectors are also made.


title: Transverse Momentum Distribution in b-> s Gamma

abstract:
  We present the complete calculation of the transverse momentum distribution
for the decay b->s Gamma. The contributions of the leading operator O_7 are
computed: infrared logarithms are resummed with next-to-leading accuracy,
according to usual techniques of resummation. Non logarithmic terms are
evaluated to O(alpha_S) by calculating one loop diagrams.


title: Finite energy chiral sum rules in QCD

abstract:
  The saturation of QCD chiral sum rules of the Weinberg-type is analyzed using
ALEPH and OPAL experimental data on the difference between vector and
axial-vector correlators (V-A). The sum rules exhibit poor saturation up to
current energies below the tau-lepton mass. A remarkable improvement is
achieved by introducing integral kernels that vanish at the upper limit of
integration. The method is used to determine the value of the finite remainder
of the (V-A) correlator, and its first derivative, at zero momentum:
$\bar{\Pi}(0) = - 4 \bar{L}_{10} = 0.0257 \pm 0.0003 ,$ and
$\bar{\Pi}^{\prime}(0) = 0.065 \pm 0.007 {GeV}^{-2}$. The dimension $d=6$ and
$d=8$ vacuum condensates in the Operator Product Expansion are also determined:
  $<{\cal {O}}_{6}> = -(0.004 \pm 0.001) {GeV}^6,$ and $<{\cal {O}}_{8}> =
-(0.001 \pm 0.006) {GeV}^8.$


title:
Scattering of neutrinos on a polarized electron target as a test for new
  physics beyond the Standard Model

abstract:
  In this paper, we analyze the scattering of the neutrino beam on the
polarized electron target, and predict the effects of two theoretically
possible scenarios beyond the Standard Model. In both scenarios, Dirac
neutrinos are assumed to be massive.
  First, we consider how the existence of CP violation phase between the
complex vector V and axial A couplings of the Left-handed neutrinos affects the
azimuthal dependence of the differential cross section. The future superbeam
and neutrino factory experiments will provide the unique opportunity for the
leptonic CP violation studies, if the large magnetized sampling calorimeters
with good event reconstruction capabilities are build.
  Next, we take into account a scenario with the participation of the exotic
scalar S coupling of the Right-handed neutrinos in addition to the standard
vector V and axial A couplings of the Left-handed neutrinos. The main goal is
to show how the presence of the R-handed neutrinos, in the above process
changes the spectrum of recoil electrons in relation to the expected Standard
Model prediction, using the current limits on the non-standard couplings. The
interference terms between the standard and exotic couplings in the
differential cross section depend on the angle $\alpha$ between the transverse
incoming neutrino polarization and the transverse electron polarization of the
target, and do not vanish in the limit of massless neutrino. The detection of
the dependence on this angle in the energy spectrum of recoil electrons would
be a signature of the presence of the R-handed neutrinos in the
neutrino-electron scattering. To make this test feasible, the polarized
artificial neutrino source needs to be identified.


title: R\'enyi statistics in high energy particle production

abstract:
  It is shown that R\'enyi statistics provides a plausible basis to describe
the hadron distributions measured in high energy particle interactions.
Generalized Boltzmann and gamma distributions obtained by maximization of
R\'enyi entropy under constraints on Kolmogorov-Nagumo averages are used to
describe the hadron transverse momentum and multiplicity spectra
correspondingly.


title:
Linking Chiral and Topological Aspects of the Quark-Quark Interaction,
  in QCD

abstract:
  We present the results of a recent investigation of the short-distance
structure of non-perturbative interaction between light quarks. We analyze the
connection between topology and the dynamics responsible for the spontaneous
breaking of chiral symmetry. By measuring some appropriate correlation
functions on the lattice, we provide compelling evidence for instanton-induced
dynamics.


title: An improved analysis of k_T effects for SSA in hadronic collisions

abstract:
  The role of intrinsic transverse momentum both in unpolarized and polarized
processes is discussed. We consider inclusive cross sections for pion
production in hadronic collisions and for Drell-Yan processes. We reanalyze
transverse single spin asymmetries (SSA) in inclusive pion production,
p(transv. polarized) p --> pion + X, in terms of Sivers effect and show its
contribution to A_{UL} in semi-inclusive DIS (SIDIS).


title: Chargino Contributions in $B \to \phi K_S$ Asymmetry

abstract:
  CP asymmetry in $B \to \phi K_S$ decay is studied in a special context of
supersymmetry theories, in which the charginos play an important role. We find
that in addition to the gluino, chargino can also make large contributions to
CP asymmetry in $B \to \phi K_S$ decay. After considering the constraints from
$B \to J/psi K_S$ decay, we study three special scenarios: (a). Large mixing on
left-handed charm and top squarks (LL mixing); (b). Large mixing on
right-handed charm and top squarks (RR mixing); (c). Large mixing on
left-handed charm and top squarks plus right-handed charm and top squarks (LL +
RR mixing). We show quantitatively that because of large squark mixing within
second and third generations, an $\mathcal O$(1) effect on CP violation in $B
\to \phi K_S$ is possible.


title: Axial Currents from CKM Matrix CP Violation and Electroweak Baryogenesis

abstract:
  The first principle derivation of kinetic transport equations suggests that a
CP-violating mass term during the electroweak phase transition can induce axial
vector currents. Since the important terms are of first order in gradients
there is a possibility to construct new rephasing invariants that are
proportional to the CP phase in the Cabibbo-Kobayashi-Maskawa matrix and to
circumvent the upper bound of CP-violating contributions in the Standard Model,
the Jarlskog invariant. Qualitative arguments are given that these new
contributions still fail to explain electroweak baryogenesis in extensions of
the Standard Model with a strong first order phase transition.


title: On the nature of light scalar mesons from their large $N_c$ behavior

abstract:
  We show how to obtain information about the states of an effective field
theory in terms of the underlying fundamental theory. In particular we analyze
the spectroscopic nature of meson resonances from the meson-meson scattering
amplitudes of the QCD low energy effective theory, combined with the expansion
in the large number of colors. The vectors follow a qqbar behavior, whereas the
sigma, kappa and f_0(980) scalars disappear for large N_c, in support of a
qqqbarqbar-like nature. The a_0 shows a similar pattern, but the uncertainties
are large enough to accommodate both interpretations.


title: Nucleus-nucleus interaction in the perurbative QCD

abstract:
  Nucleus-nucleus interaction is studied in the framework of the perturbative
QCD with large number of colours and a fixed coupling constant. The pomeron
tree diagrams are summed by an effective field theory. The classical field
equations are solved by iteration procedure, which is found convergent in a
restricted domain of not too high energies and atomic numbers. The found gluon
distributions do not scale, have their maxima close to 2 GeV/c independent of
rapidity and fall towards the central rapidity region. The cross-sections
slowly grow with energy due to the contribution from peripheral collisions,
where evolution remains linear. Simple variational estimates at higher
rapidities confirm this tendency.


title: On the hidden charm state at 3872 MeV

abstract:
  We discuss some puzzling aspects of the narrow hidden charm resonance that
was recently discovered by the Belle Collaboration at mass 3872 MeV. In order
to determine its quantum numbers, a crucial piece of information is the spin of
the dipion in the decay final state pi^+pi^-J/psi. We give the angular
distributions and correlations of the final particles in the decay which will
give this information about the nature of this resonance.


title: Some News on Spin Physics

abstract: We briefly review some of the recent developments in QCD spin physics.


title: Parity Doubling in the Meson Spectrum

abstract:
  A simple argument for the restoration of parity symmetry high in the hadron
spectrum is presented. The restoration scale is estimated to be 2.5 GeV. This
in turn implies that typical quark model phenomenology such as scalar
confinement or the $^3P_0$ decay model are only useful for low lying states.
Minimal requirements for constructing more general phenomenologies are
discussed. An additional mass degeneracy between $J^{++}$ and $ J^{--}$ states
is shown to occur and an isovector $3^{++}$ state is predicted at roughly 1700
MeV, in contradiction with the naive quark model. Similarly, isovector and
isoscalar $4^{--}$ states are predicted at 2000 MeV. Finally, these results
imply that Regge trajectories must become nonlinear at high spin.


title: Status of resummed predictions for QCD final state observables

abstract:
  We provide a brief review of the current status of resummed predictions for
QCD final state observables such as event shapes and jet rates in a variety of
different hard processes. Particular emphasis is given to more recent
developments such as the study of non global observables, development of
generalized resummation formulae and resummations for new types of event shape
variables.


title: Two-Field Q-ball Solutions of Supersymmetric Hybrid Inflation

abstract:
  We demonstrate the existence of two-field Q-ball solutions of the scalar
field equations of supersymmetric D- and F-term hybrid inflation. The solutions
consist of a complex inflaton field together with a real symmetry breaking
field. Such inflatonic Q-balls may play a fundamental role in reheating and the
post-inflation era of supersymmetric hybrid inflation models.


title: Solar neutrinos: the SNO salt phase results and physics of conversion

abstract:
  We have performed analysis of the solar neutrino data including results from
the SNO salt phase as well as the combined analysis of the solar and the
KamLAND results. The best fit values of neutrino parameters are Delta m^2 =
7.1e-5 eV^2, tan^2\theta = 0.40 with the boron flux f_B = 1.04. New SNO results
strongly disfavor maximal mixing and the h-LMA region (Delta m^2 > 1e-4 eV^2)
which is accepted now at the 3-sigma level. We find the 3-sigma upper bounds:
Delta m^2 < 1.7e-4$ eV^2 and tan^2\theta < 0.64, and the lower bound Delta m^2
> 4.8e-5 eV^2. Non-zero 13-mixing does not change these results significantly.
The present data determine quantitatively the physical picture of the solar
neutrino conversion. At high energies relevant for SNO and Super-Kamiokande the
deviation of the effective survival probability from the non-oscillatory value
is about 10 - 14%. The oscillation effect contribution to this difference about
10% and the Earth regeneration is about 3 - 4%. At low energies (E < 1 MeV) the
matter corrections to vacuum oscillation effect are below 5%. The predictions
for the forthcoming measurements are given which include the spectral
distortion and CC/NC ratio at SNO, the Day-Night asymmetry, the KamLAND
spectrum and rate.


title: GADZOOKS! Antineutrino Spectroscopy with Large Water Cerenkov Detectors

abstract:
  We propose modifying large water \v{C}erenkov detectors by the addition of
0.2% gadolinium trichloride, which is highly soluble, newly inexpensive, and
transparent in solution. Since Gd has an enormous cross section for radiative
neutron capture, with $\sum E_\gamma = 8$ MeV, this would make neutrons visible
for the first time in such detectors, allowing antineutrino tagging by the
coincidence detection reaction $\bar{\nu}_e + p \to e^+ + n$ (similarly for
$\bar{\nu}_\mu$). Taking Super-Kamiokande as a working example, dramatic
consequences for reactor neutrino measurements, first observation of the
diffuse supernova neutrino background, Galactic supernova detection, and other
topics are discussed.


title: Hints on dual variables from the lattice SU(2) gluodynamics

abstract:
  In many cases, topological excitations become fundamental variables in a dual
formulation of the theory. Assuming this is true in case of SU(2) gluodynamics,
we look for hints on the dual variables from the lattice simulations.
Two-dimensional vortices, or branes with recently established properties seem
to be most natural candidates. The total area of the branes scales in the
physical units while the non-Abelian action is ultraviolet divergent. The
branes are populated with magnetic monopoles, or tachyonic mode.


title: Particle Spectra and Gauge Unification in $SU(6) \times SU(2)_R$ Model

abstract:
  We study the path from the string scale physics to the low-energy physics in
the $SU(6) \times SU(2)_R$ string-inspired model with the flavor symmetry ${\bf
Z}_M \times {\bf Z}_N \times \tilde{D}_4$. The flavor symmetry controls the
mass spectra of heavy particles as well as those of quarks and leptons in the
intermediate energy region ranging from the string scale ($\sim 10^{18} {\rm
GeV}$) to the electroweak scale. In this paper we examine the mass spectra of
heavy particles in detail in our model. The renormalization group evolution of
the gauge couplings is studied up to two-loop order. A consistent solution of
the gauge unification around the string scale is found by adjusting the spectra
of the anti-generation matter fields.


title:
Resummation effects in Higgs boson transverse momentum distribution
  within the framework of unintegrated parton distributions

abstract:
  The cross sections describing the transverse momentum distributions of Higgs
bosons are discussed within the framework of unintegrated parton distributions
obtained from the CCFM equations in the single loop approximation. It is shown
how the approximate treatment of the CCFM equations generates the standard
expressions describing the soft gluon resummation effects in the corresponding
cross sections. Possible differences between exact and approximate solutions of
the CCFM equations are discussed on the example of the gg -> H fusion
mechanism, which gives the dominant contribution to Higgs production.


title: A new treatment of the in-medium chiral condensates

abstract:
  A new formalism to calculate the in-medium chiral condensate is presented. At
lower densities, this approach leads to a linear expression. If we demand a
compatibility with the famous model-independent result, then the pion-nucleon
sigma term should be six times the average current mass of light quarks.
QCD-like interactions may slow the decreasing behavior of the condensate with
increasing densities, compared with the linear extrapolation, if densities are
lower than twice the nuclear saturation density. At higher densities, the
condensate vanishes inevitably.


title: Is Theta+(1540) a Kaon--Skyrmion Resonance?

abstract:
  We reconsider the relationship between the bound state and the SU(3) rigid
rotator approaches to strangeness in the Skyrme model. For non-exotic S=-1
baryons the bound state approach matches for small m_K onto the rigid rotator
approach, and the bound state mode turns into the rotator zero-mode. However,
for small m_K, we find no S=+1 kaon bound states or resonances in the spectrum,
confirming previous work. This suggests that, at least for large N and small
m_K, the exotic state may be an artifact of the rigid rotator approach to the
Skyrme model. An S=+1 near-threshold state comes into existence only for
sufficiently large SU(3) breaking. If such a state exists, then it has the
expected quantum numbers of Theta+: I=0, J=1/2 and positive parity. Other
exotic states with (I=1, J^P=3/2+), (I=1,J^P=1/2+), (I=2, J^P=5/2+) and
(I=2,J^P=3/2+) appear as its SU(2) rotator excitations. As a test of our
methods, we also identify a D-wave S=-1 near-threshold resonance that, upon
SU(2) collective coordinate quantization, reproduces the mass splittings of the
observed states Lambda(1520), Sigma(1670) and Sigma(1775) with good accuracy.


title: Universal features of JIMWLK and BK evolution at small x

abstract:
  In this paper we present the results of numerical studies of the JIMWLK and
BK equations with a particular emphasis on the universal scaling properties and
phase space structure involved. The results are valid for near zero impact
parameter in DIS. We demonstrate IR safety due to the occurrence of a rapidity
dependent saturation scale Q_s(\tau). Within the set of initial conditions
chosen both JIMWLK and BK equations show remarkable agreement. We point out the
crucial importance of running coupling corrections to obtain consistency in the
UV. Despite the scale breaking induced by the running coupling we find that
evolution drives correlators towards an asymptotic form with near scaling
properties. We discuss asymptotic features of the evolution, such as the \tau-
and A-dependence of Q_s away from the initial condition.


title:
Interference and binding effects in decays of possible molecular
  component of X(3872)

abstract:
  It is pointed out that the internal structure of the narrow resonance X(3872)
at the D^0 {\bar D}^{*0} threshold can be studied in some detail by measuring
the rate and the spectra in the decays X(3872) \to D^0 {\bar D}^0 \pi^0 and
X(3872) \to D^0 {\bar D}^0 \gamma. In particular, if this resonance contains a
dominant `molecular' component D {\bar D^*} \pm {\bar D} D^*, this component
can be revealed and studied by a distinct pattern of interference between the
underlying decays of D^{*0} and {\bar D}^{*0} whose coherence is ensured by
fixed (but yet unknown) C parity of the X(3872).


title: Photoproduction of isolated photon and jet at the DESY HERA

abstract:
  The next-to-leading order (NLO) QCD calculation for the isolated photon and
isolated photon plus jet photoproduction at the ep collider DESY HERA is
presented. The predictions for the isolated photon with no restrictions imposed
on the jet are compared with the previous ones obtained in the small cone
approximation, and the differences are found to be below 2%. The theoretical
uncertainties in the cross section of the photoproduction of the photon plus
jet are discussed. A short comparison with the new preliminary H1 data and with
the NLO predictions of Fontannaz et al. is also presented.