title:
Comparison of the Gottfried and Adler sum rules within the large-Nc
  expansion

abstract:
  The Adler sum rule for deep inelastic neutrino scattering measures the
isospin of the nucleon and is hence exact. By contrast, the corresponding
Gottfried sum rule for charged lepton scattering was based merely on a valence
picture and is modified both by perturbative and non-perturbative effects.
Noting that the known perturbative corrections to two-loop order are suppressed
by a factor 1/N_c^2, relative to those for higher moments, we propose that this
suppression persists at higher orders and also applies to higher-twist effects.
Moreover, we propose that the differences between the corresponding radiative
corrections to higher non-singlet moments in charged-lepton and neutrino deep
inelastic scattering are suppressed by 1/N_c^2, in all orders of perturbation
theory. For the first moment, in the Gottfried sum rule, the substantial
discrepancy between the measured value and the valence-model expectation may be
attributed to an intrinsic isospin asymmetry in the nucleon sea, as is indeed
the case in a chiral-soliton model, where the discrepancy persists in the limit
N_c-->infinity.


title: A Non-Extensive Model for Quark Matter Produced in Heavy Ion Collisions

abstract:
  We describe quark matter in the framework of non-extensive thermodynamics. We
point out that partcile spectra with power-law tail lead to an increased energy
and entropy per particle. This way even a massless plasma may give E/N = 1 GeV
at T = 175 MeV temperature, alike thermal hadronic fits to RHIC experiment. In
this case E/NT = 6 instead of 3.


title:
Mode Softening near the critical point within effective approaches to
  QCD

abstract:
  We study the soft mode along the critical line in the phase diagram with the
tricritical point, using the Nambu--Jona-Lasinio model. At the critical point
with finite quark mass, the ordering density becomes a linear combination of
the scalar, quark number and energy densities, and their susceptibilities
diverge with the same exponent. Based on the conservation law, it is argued
that the divergent susuceptibility of a conserved density must be accompanied
by a critically--slowing hydrodynamic mode. The shift of the soft mode from the
sigma meson to the hydrodynamic mode occurs at the tricritical point on the
critical line.


title: Perspectives on Issues Beyond the Standard Model

abstract:
  In this opening talk I first describe how we are entering a data-rich era,
and what clues we might soon have to physics beyond the SM (on a time scale of
several years). Then we turn to a number of the basic issues we hope to
explain, and discuss what level of theory may address them, the SM or
supersymmetric SM, or string theory, or "other". Next we consider some of the
large number of fine-tunings we seem to have, and how they may be clues,
focusing on how the fine-tuning of M$_{Z}$ and m$_{h}$ suggest the MSSM needs
to be extended as the low scale theory, and on how flavor physics may be a
powerful probe of string theory. Finally we examine using benchmark models to
study all these issues.


title:
Hyperon polarization in different inclusive production processes in
  unpolarized high energy hadron-hadron collisions

abstract:
  We apply the picture proposed in a previous Letter, which relates the hyperon
polarization in unpolarized hadron-hadron collisions to the left-right
asymmetry in singly polarized reactions, to the production of different
hyperons in reactions using different projectiles and/or targets. We discuss
the different ingredients of the proposed picture in detail and present the
results for hyperon polarization in the reactions such as $pp$, $K^-p$,
$\pi^{\pm}p$, and $\Sigma^-p$ collisions. We compare the results with the
available data and make predictions for future experiments.


title: SU_L(4) x U(1) model for electroweak unification

abstract:
  After some general remarks about SU_L(4) electroweak unification, the model
is extended to SU_L(4)xU_X(1) to accomodate fractionally charged quarks. The
unification scale is expected to be in TeV region. A right-handed Majorana
neutrino along with known lepton are put in the fundamental representation of
SU_L(4) with Y_X=0. The see-saw mechanism for neutrino masses and flavor mixing
in neutrino sector is a natural feature of the model. The lepton number
violating processes can occure through dilepton gauge bosons contained in the
model.


title: Production and dilution of gravitinos by modulus decay

abstract:
  We study the cosmological consequences of generic scalar fields like moduli
which decay only through gravitationally suppressed interactions. We consider a
new production mechanism of gravitinos from moduli decay, which might be more
effective than previously known mechanisms, and calculate the final
gravitino-to-entropy ratio to compare with the constraints imposed by
successful big bang nucleosynthesis (BBN) etc., taking possible hadronic decays
of gravitinos into account. We find the modulus mass smaller than $\sim 10^4$
TeV is excluded. On the other hand, inflation models with high reheating
temperatures $T_{R,\rm inf} \sim 10^{16}$ GeV can be compatible with BBN thanks
to the late-time entropy production from the moduli decay if model parameters
are appropriately chosen.


title: Estimate of the chiral condensate in quenched lattice QCD

abstract:
  We determine the value of the quark condensate from quenched QCD simulations
on the lattice in two ways: (i) by using the GMOR formula; (ii) by comparing
the OPE prediction for the Goldstone pole contribution to the pseudoscalar
vertex, at moderately large momenta. In the MSbar scheme at mu=2 GeV, from the
GMOR formula we obtain <q qbar> = -(273 +/- 19 MeV)^3. We show that the value
extracted from the pseudoscalar vertex, <q qbar> = - (312 +/- 24 MeV)^3, is
consistent with the result obtained from the first (standard) method.


title:
Les Houches Guidebook to Monte Carlo Generators for Hadron Collider
  Physics

abstract:
  Recently the collider physics community has seen significant advances in the
formalisms and implementations of event generators. This review is a primer of
the methods commonly used for the simulation of high energy physics events at
particle colliders. We provide brief descriptions, references, and links to the
specific computer codes which implement the methods. The aim is to provide an
overview of the available tools, allowing the reader to ascertain which tool is
best for a particular application, but also making clear the limitations of
each tool.


title: Relativistic Effects in the Electromagnetic Structure of $\rho$-meson

abstract:
  The relativistic calculations of the electromagnetic form factors and static
moments of $\rho$-meson are given in the framework of the relativistic
Hamiltonian dynamics with different model wave functions. The impulse
approximation is used. Lorentz covariance and conservation law for the
electromagnetic current operator are taken into account.


title: Constraining SUSY Dark Matter with the ATLAS Detector at the LHC

abstract:
  In the event that R-Parity conserving supersymmetry (SUSY) is discovered at
the LHC, a key issue which will need to be addressed will be the consistency of
that signal with astrophysical and non-accelerator constraints on SUSY Dark
Matter. This issue is studied for the SPS1a mSUGRA benchmark model by using
measurements of end-points and thresholds in the invariant mass spectra of
various combinations of leptons and jets in ATLAS to constrain the model
parameters. These constraints are then used to assess the statistical accuracy
with which quantities such as the Dark Matter relic density and direct
detection cross-section can be measured. Systematic effects arising from the
use of different mSUGRA RGE codes are also estimated. Results indicate that for
SPS1a a statistical(systematic) precision on the relic abundance ~ 2.8% (3 %)
can be obtained given 300 fb-1 of data.


title:
Chiral loop corrections and isospin violation effects in
  epsilon'/epsilon

abstract:
  A complete analysis of isospin breaking in $K\to 2\pi$ amplitudes, including
both strong and electromagnetic corrections at next-to-leading order in chiral
perturbation theory, has been achieved recently. We discuss the implication of
these effects, together with the previously known chiral loop corrections, on
the direct CP-violating ratio epsilon'/epsilon.


title:
Large Direct CP Violation in B^0 -> pi^+ pi^- and an Enhanced Branching
  Ratio for B^0 -> pi^0 pi^0

abstract:
  Recent measurements of B^0 -> pi pi decays reveal two features that are in
conflict with conventional calculations: the channel B^0 (Bbar^0) -> pi^+ pi^-
shows a large direct CP-violating asymmetry, and the channel B^0 (B^0) -> pi^0
pi^0 has an unexpectedly high branching ratio. We show that both features can
be understood in terms of strong-interaction mixing of pi pi and D Dbar
channels in the isospin-zero state, an effect that is important because of the
large experimentally observed ratio Gamma(B^0 / Bbar^0 -> D^+ D^-) / Gamma (B^0
/ Bbar^0 -> pi^+ pi^-) approx. 50. Our dynamical model correlates the branching
ratios and the CP-violating parameters C and S, for the decays B^0 (Bbar^0) ->
pi^+ pi^-, B^0 (Bbar^0) -> pi^0 pi^0, B^0 (Bbar^0) -> D^+ D^- and B^0 (Bbar^0)
-> D^0 Dbar^0.


title:
One-loop weak corrections to $\gamma/Z$ hadro-production at finite
  transverse momentum

abstract:
  We illustrate the effects of one-loop weak corrections onto the production of
neutral gauge bosons of the Standard Model at RHIC-Spin, Tevatron and LHC, in
presence of quark/gluon radiation from the initial state. We find such effects
to be rather large, up to ${\cal O}(10-20%)$ in typical observables at all such
colliders, where the cross section is measurable, thus advocating their
inclusion in precision analyses


title: The Perturbative Pomeron and the Odderon: Where can we find them?

abstract:
  QCD predicts the existence of the perturbative Pomeron and of the Odderon.
But both of them appear to be rather difficult to observe experimentally. We
describe the experimental status of these two objects, discuss possible reasons
for their elusive behavior, and point out promising search strategies.


title: A Comparison of Predictions for SM Higgs Boson Production at the LHC

abstract:
  This paper describes a comparison of most of the available predictions for
the cross section and transverse momentum distribution for a 125 GeV mass Higgs
at the LHC, including those from the PYTHIA and HERWIG parton shower Monte
Carlos and from four resummation calculations.


title:
Neutrino Mixing from the Charged Lepton Sector with Sequential
  Right-Handed Lepton Dominance

abstract:
  We systematically analyze the possibility that bi-large lepton mixing
originates from the charged lepton sector in models with sequential dominance
for the right-handed charged leptons. We derive analytical expressions for the
mixing angles and CP phases of the MNS matrix for the case of zero mixing from
the neutrino sector, which is arranged for with the help of sequential
dominance for the right-handed neutrinos. For small $\theta_{13}$, the two
large mixing angles $\theta_{12}$ and $\theta_{23}$ are determined by the
Yukawa couplings to the dominant right-handed tau. The mixing angle
$\theta_{13}$ is then governed by the subdominant right-handed muon Yukawa
couplings. Naturally small $\theta_{13}$ and sequential right-handed lepton
dominance can be realized in type I see-saw models and their type II upgrades
via spontaneously broken SO(3) flavour symmetry and real vacuum alignment. We
discuss the prediction for $\theta_{13}$ in this scenario and corrections to it
including the dependence on the neutrino mass scale.


title:
Systematic study of the impact of CP-violating phases of the MSSM on
  leptonic high-energy observables

abstract:
  Low-energy results from measurements of leptonic dipole moments are used to
derive constraints on the CP-violating phases of the dimensionful parameters of
the minimal supersymmetric extension of the standard model (MSSM). We use these
(known) bounds to investigate the impact of these phases on CP-even cross
sections at high-energy e^+e^- and e^-e^- colliders. To that end we define two
measures of the significance with which the existence of non--vanishing phases
could be deduced from the measurements of these cross sections. We find that
highly significant evidence for deviations from the CP-conserving MSSM could be
obtained at the next e^+e^- collider even if the electric dipole moment of the
electron is very small or zero. We also analyze a CP-odd final state
polarization, which can be large when two different charginos or neutralinos
are produced. Finally, we study correlations between the phase--sensitive
observables.


title: Faster Parton Distribution Evaluation in Monte Carlos

abstract:
  I recommend a few trivial changes to the routines that evaluate CTEQ parton
distribution functions. These changes allow modern compilers to optimize the
evaluation routines, while having no quantitative effect on the results.
Computation time is reduced by a factor of 2 in matrix-element calculations,
and by 1.3-1.5 in the showering Monte Carlo event generators with fast detector
effects included. The results suggest that additional time should be invested
in optimizing these routines.


title:
Critical View to "The IGEX neutrinoless double beta decay
  experiment...." published in Phys. Rev. D, Volume 65 (2002) 092007

abstract:
  Recently a paper entitled ``The Igex 76Ge Neutrinoless Double-Beta Decay
Experiment: Prospects for Next Generation Experiments'' has been published in
Phys. Rev. D 65 (2002) 092007. In view of the recently reported evidence for
neutrinoless double beta decay (KK-Evid01,KK02-Found,KK02-PN) it is
particularly unfortunate that the IGEX paper is rather incomplete in its
presentation. We would like to point out in this Comment that and why it would
be highly desirable to make more details about the experimental conditions and
the analysis of IGEX available. We list some of the main points, which require
further explanation. We also point to an arithmetic mistake in the analysis of
the IGEX data, the consequence of which are too high half life limits given in
that paper.


title: Infrared Structure of $e^+e^- \to 2$ jets at NNLO

abstract:
  The production of two jets is the simplest exclusive quantum chromodynamics
process in electron-positron annihilation. Using this process, we examine the
structure of next-to-next-to-leading order (NNLO) corrections to jet production
observables. We derive a subtraction formalism including double real radiation
at tree level and single real radiation at one loop. For two-jet production,
these subtraction terms coincide with the full matrix elements, thus
highlighting the phase space structure of the subtraction procedure. We then
analytically compute the infrared singularities arising from each partonic
channel. For the purely virtual (two-parton) NNLO corrections, these take the
well known form predicted by Catani's infrared factorization formula. We
demonstrate that individual terms in the infrared factorization formula can be
identified with infrared singular terms from three- and four-parton final
states, leaving only single poles and a contribution from the one-loop soft
gluon current, which subsequently cancels between the three- and four-parton
final states. Summing over all different final states, we observe an explicit
cancellation of all infrared poles and recover the known two-loop correction to
the hadronic $R$-ratio.


title:
Partonic calculation of the two-photon exchange contribution to elastic
  electron-proton scattering at large momentum transfer

abstract:
  We estimate the two-photon exchange contribution to elastic electron-proton
scattering at large momentum transfer through the scattering off a parton in
the proton. We relate the process on the nucleon to the generalized parton
distributions which also enter in other wide angle scattering processes. We
find that when taking the polarization transfer determinations of the form
factors as input, adding in the 2 photon correction, does reproduce the
Rosenbluth data.


title:
Implications of SNO and BOREXINO results on Nuetrino Oscillations and
  Majorana Magnetic Moments

abstract:
  Using the recent measurement of SNO salt phase experiment, we investigate how
much the solar neutrino flux deficit observed at SNO could be due to $\nu_e$
transition into antineutrino. Our analysis leads to rather optimistic
conclusion that the SNO salt phase data may indicate the existence of Majorana
magnetic moment. The prospect for the future BOREXINO experiment is also
discussed.


title: Calculation of coupling constant g_phi-pi-gamma in QCD sum rules

abstract:
  The coupling constant of g_phi-pi-gamma decay is calculated in the method of
QCD sum rules. A comparison of our prediction on the coupling constant with the
result obtained from analysis of the experimental data is performed.


title:
Truncated Moments of Nonsinglet Parton Distributions in the double
  logarithmic $ln^2x$ approximation

abstract:
  The method of truncated Mellin moments in a solving QCD evolution equations
of the nonsinglet structure functions $F_2^{NS}(x,Q^2)$ and $g_1^{NS}(x,Q^2)$
is presented. All calculations are performed within double logarithmic $ln^2x$
approximation. An equation for truncated moments which incorporates $ln^2x$
effects is formulated and solved for the unintegrated structure function
$f^{NS}(x,Q^2)$. The contribution to the Bjorken sum rule coming from the
region of very small $x$ is quantified. Further possible improvement of this
approach is also discussed.


title: Nucleon form factors, B-meson factories and the radiative return

abstract:
  The feasibility of a measurement of the electric and magnetic nucleon form
factors at $B$-meson factories through the radiative return is studied. Angular
distributions allow a separation of the contributions from the two form
factors. The distributions are presented for the laboratory and the hadronic
rest frame, and the advantages of different coordinate systems are
investigated. It is demonstrated that $Q^2$ values up to 8 or even 9 GeV$^2$
are within reach. The Monte Carlo event generator PHOKHARA is extended to
nucleon final states, and results are presented which include Next-to-Leading
Order radiative corrections from initial-state radiation. The impact of angular
cuts on rates and distributions is investigated and the relative importance of
radiative corrections is analysed.


title:
Analyses of k_t distributions at RHIC by means of some selected
  statistical and stochastic models

abstract:
  The new data on k_t distributions obtained at RHIC are analysed by means of
selected models of statistical and stochastic origin in order to estimate their
importance in providing new information on hadronization process, in particular
on the value of the temperature at freeze-out to hadronic phase.


title: Meson loops and the $g_{D^* D \pi}$ coupling

abstract:
  The $D^*D\pi$ form factor is evaluated at low and moderate $Q^2$ in a
hadronic loop model, for off-shell $D$ mesons. The results contain arbitrary
constants, which are fixed so as to match previous QCD sum rule calculations
valid at higher $Q^2$. The form factor obtained in this way was used to extract
the coupling constant, which is in very good agreement with the experimental
value.


title: Constructing 5d orbifold grand unified theories from heterotic strings

abstract:
  A three-generation Pati-Salam model is constructed by compactifying the
heterotic string on a particular T^6/Z_6 Abelian symmetric orbifold with two
discrete Wilson lines. The compactified space is taken to be the Lie algebra
lattice G_2+SU(3)+SO(4). When one dimension of the SO(4) lattice is large
compared to the string scale, this model reproduces many features of a 5d
SO(10) grand unified theory compactified on an S^1/Z_2 orbifold. (Of course,
with two large extra dimensions we can obtain a 6d SO(10) grand unified
theory.) We identify the orbifold parities and other ingredients of the
orbifold grand unified theories in the string model. Our construction provides
a UV completion of orbifold grand unified theories, and gives new insights into
both field theoretical and string theoretical constructions.


title: Quark Propagation in the Quark-Gluon Plasma

abstract:
  It has recently been suggested that the quark-gluon plasma formed in
heavy-ion collisions behaves as a nearly ideal fluid. That behavior may be
understood if the quark and antiquark mean-free- paths are very small in the
system, leading to a "sticky molasses" description of the plasma, as advocated
by the Stony Brook group. This behavior may be traced to the fact that there
are relatively low-energy $q\bar{q}$ resonance states in the plasma leading to
very large scattering lengths for the quarks. These resonances have been found
in lattice simulation of QCD using the maximum entropy method (MEM). We have
used a chiral quark model, which provides a simple representation of effects
due to instanton dynamics, to study the resonances obtained using the MEM
scheme. In the present work we use our model to study the optical potential of
a quark in the quark-gluon plasma and calculate the quark mean-free-path. Our
results represent a specific example of the dynamics of the plasma as described
by the Stony Brook group.


title: A Simple Model of Neutrino Masses from Supersymmetry Breaking

abstract:
  We analyze a class of supersymmetric models first introduced by Arkani-Hamed
et al and Borzumati et al in which the light neutrino masses result from
higher-dimensional supersymmetry-breaking terms in the MSSM super- and
Kahler-potentials. The mechanism is closely related to the Giudice-Masiero
mechanism for the MSSM $\mu$ parameter, and leads to TeV-scale right-handed
neutrino and sneutrino states, that are in principle accessible to direct
experimental study. The dominant contribution to the light neutrino (Majorana)
mass matrix is a one-loop term induced by a lepton-number violating $B$-term
for the sneutrino states that is naturally present. We focus upon the
simplification and analysis of the flavour structure of this general class of
models, finding that simple and novel origins for the light neutrino mass
matrix are possible. We find that a subdominant tree-level `see-saw'
contribution may lead to interesting perturbations of the leading
one-loop-induced flavour structure, possibly generating the small ratio $\Delta
m_{\rm solar}^2/\Delta m_{\rm atm}^2$ dynamically.


title:
Prospects of accelerator and reactor neutrino oscillation experiments
  for the coming ten years

abstract:
  We analyze the physics potential of long baseline neutrino oscillation
experiments planned for the coming ten years, where the main focus is the
sensitivity limit to the small mixing angle $\theta_{13}$. The discussed
experiments include the conventional beam experiments MINOS, ICARUS, and OPERA,
which are under construction, the planned superbeam experiments J-PARC to
Super-Kamiokande and NuMI off-axis, as well as new reactor experiments with
near and far detectors, represented by the Double-Chooz project. We perform a
complete numerical simulation including systematics, correlations, and
degeneracies on an equal footing for all experiments using the GLoBES software.
After discussing the improvement of our knowledge on the atmospheric parameters
$\theta_{23}$ and $\Delta m^2_{31}$ by these experiments, we investigate the
potential to determine $\theta_{13}$ within the next ten years in detail.
Furthermore, we show that under optimistic assumptions and for $\theta_{13}$
close to the current bound, even the next generation of experiments might
provide some information on the Dirac CP phase and the type of the neutrino
mass hierarchy.


title: Sudakov form factor in effective field theory

abstract:
  We discuss the Sudakov form factor in the framework of the soft-collinear
effective theory. The running of the short distance coefficient function from
high to low scale gives the summation of Sudakov logarithms to all orders. Our
discussions concentrate on the factorization and derivation of the
renormalization group equation from the effective theory point of view. The
intuitive interpretation of the renormalization group method is discussed. We
compared our method with other resummation approaches in the literatures.


title: Natural Kobayashi-Maskawa Model of CP Violation and Flavor Physics

abstract:
  We explore the possible tie between the naturalness of having a very small
strong CP $\theta$ parameter in the Kobayashi-Maskawa Model and the flavor
symmetry. We provide many examples in which the flavor symmetry group at high
energy can naturally give rise to Kobayashi-Maskawa Model at low energy with a
naturally small theta.


title: Muonium Lifetime and Heavy Quark Decays

abstract:
  Environmental effects on the muon lifetime are described. A general theorem
on the cancellation of bound state phase space suppression and final state
interaction enhancement is illustrated for muonium and muonic atoms. Lessons
from those bound muon examples are applied to the b decay puzzle and apparent
inconsistencies in K{e3} decay rates.


title: A chiral qbarqbarqq nonet?

abstract:
  We point out that meson spectrum indicates the existence of a degenerate
chiral nonet in the energy region around 1.4 GeV with a slightly inverted
spectrum with respect to a qq nonet. Based on this observation, the
approximately linear rising of the mass of a hadron with the number of
constituent quarks, and the existence of a cuasidegenerate pseudoscalar nonet,
we conjecture the existence of a tetraquark chiral nonet in this energy region
with chiral symmetry implemented directly. We realize this idea in a chiral
model and take into account the mixing of the tetraquark chiral nonet with a
conventional qq nonet. We find that the mass spectrum of mesons below 1.5 GeV
is consistent with this picture. In general, pseudoscalar states arise as
mainly qq states but scalar states turn out to be strong admixtures of qq and
tetraquark states.


title: Time-to-space conversion in quantum field theory of flavor mixing

abstract:
  We consider the problem of time-to-space conversion in quantum field theory
of flavor mixing using a generalization of the wave-packet method in quantum
mechanics. We work entirely within the canonical formalism of creation and
annihilation operators that allows us, unlike the usual wave-packet
formulation, to include the nontrivial effect due to flavor condensation in the
vacuum.


title:
Neutral top-pion and $t\gamma(z)$ production at the HERA and THERA
  colliders

abstract:
  In the context of top-color assisted technicolor ($TC2$) models, we calculate
the contributions of the neutral top-pion $ \pi_{t}^{0}$ to $t\gamma$ and $tz$
production via the processes $ ep\to \gamma c \to t\gamma $ and $ ep\to \gamma
c \to tz$ at the $HERA$ and $THERA$ colliders. Our results show that the cross
sections $\sigma_{t\gamma}(s)$ and $\sigma_{tz}(s)$ are very small at the
$HERA$ collider with $\sqrt{s}=320GeV $. However, in most of the parameter
space, $\sigma_{t\gamma}(s)$ or $\sigma_{tz}(s)$ is in the range of about
$0.1pb \sim 1 pb$ at the $THERA$ collider with $\sqrt{s}=1000GeV$.


title: Chromo-Electric flux tubes

abstract:
  The profiles of the chromo-electric field generated by static
quark-antiquark, $Q{\bar Q}$ and three-quark, $QQQ$ sources are calculated in
Coulomb gauge. Using a variational ansatz for the ground state, we show that a
flux tube-like structure emerges and combines to the ``Y''-shape field profile
for three static quarks. The properties of the chromo-electric field are,
however, not expected to be the same as those of the full action density or the
Wilson line and the differences are discussed.


title: Pseudoscalar Form Factors in Tau-Neutrino Nucleon Scattering

abstract:
  We investigate the pseudoscalar transition form factors of nucleon for
quasi-elastic scattering and \Delta resonance production in tau-neutrino
nucleon scattering via the charged current interactions. Although the
pseudoscalar form factors play an important role for the \tau production in
neutrino-nucleon scattering, these are not known well. In this article, we
examine their effects in quasi-elastic scattering and \Delta resonance
production and find that the cross section, Q^{2} distribution, and spin
polarization of the produced \tau^{\pm} leptons are quite sensitive to the
pseudoscalar form factors.


title:
Neutrino Masses Induced by R-Parity Violation in a SUSY SU(5) Model with
  Additional \bar{5}'_L+5'_L

abstract:
  Within the framework of an SU(5) SUSY GUT model, a possible general form of
the neutrino mass matrix induced by R-parity violation is investigated. The
model has matter fields \bar{5}'_{L}+5'_{L} in addition to the ordinary matter
fields \bar{5}_{L}+10_{L} and Higgs fields H_u+\bar{H}_d. The R-parity
violating terms are given by \bar{5}_{L} \bar{5}_{L} 10_{L}, while the Yukawa
interactions are given by \bar{H}_d \bar{5}'_{L} 10_{L}. Since the matter
fields \bar{5}'_L and \bar{5}_L are different from each other at the
unification scale, the R-parity violation effects at a low energy scale appear
only through the \bar{5}'_L \leftrightarrow \bar{5}_{L} mixings. In order to
make this R-parity violation effect harmless for proton decay, a discrete
symmetry Z_3 and a triplet-doublet splitting mechanism analogous to that in the
5-plet Higgs fields are assumed.


title:
Lifetime Difference and Endpoint effect in the Inclusive Bottom Hadron
  Decays

abstract:
  The lifetime differences of bottom hadrons are known to be properly explained
within the framework of heavy quark effective field theory(HQEFT) of QCD via
the inverse expansion of the dressed heavy quark mass. In general, the spectrum
around the endpoint region is not well behaved due to the invalidity of $1/m_Q$
expansion near the endpoint. The curve fitting method is adopted to treat the
endpoint behavior. It turns out that the endpoint effects are truly small and
the explanation on the lifetime differences in the HQEFT of QCD is then well
justified. The inclusion of the endpoint effects makes the prediction on the
lifetime differences and the extraction on the CKM matrix element $|V_{cb}|$
more reliable.


title: Extraction of Axial Form Factors from Bbar0 --> D+ K- K{*0} Decay

abstract:
  Based on Bbar to D{(*)}K-K{*0} decay data, which supports factorization, we
propose to extract the kaon axial form factor in the factorization framework.
Experiment indicates that the K-K{*0} pair is produced by an axial current
where only one out of three axial form factors is dominant. The axial form
factor can be extracted by fitting the K-K{*0} mass spectrum with an
a_1(1260)-resonance plus QCD-motivated non-resonant contributions, which can be
improved as data improves.


title: $M(B^*_c)-M(B_c)$ Splitting from Nonrelativistic Renormalization Group

abstract:
  We compute the hyperfine splitting in a heavy quarkonium composed of
different flavors in next-to-leading logarithmic approximation using the
nonrelativistic renormalization group. We predict the mass difference of the
vector and pseudoscalar charm-bottom mesons to be $M(B^*_c)-M(B_c)=46 \pm 15
{(\rm th)} {}^{+13}_{-11} (\delta\alpha_s)$ MeV.


title:
Anomalous suppression of $\pi^0$ production at large transverse momentum
  in Au + Au and d + Au collisions at $\sqrt{{\bf s}_{\bf NN}} =$ 200 GeV

abstract:
  We propose a model of suppression of large $p_T$-pions in heavy ion
collisions based on the interaction of the large $p_T$ pion with the dense
medium created in the collision. The model is practically the same as the one
previously introduced to describe $J/\psi$ suppression. Both the $p_T$ and the
centrality dependence of the data are reproduced. In deuteron-gold collisions,
the effect of the final state interaction with the dense medium turns out to be
negligibly small. Here the main features of the data are also reproduced both
at mid and at forward rapidities.


title: Decay properties of new D-mesons

abstract:
  We consider radiative and pionic decays of the new D_s-mesons in the
framework of a phenomenologically motivated approach. Present data on ratios of
the two kinds of decays can be described without explicit using a 4-quark
component. Most probably, the isospin violation in decays of different
D_s-mesons is not universal, and the binding potential should be different from
Coulombic. New precise measurements may provide further clarification for the
nature of the D_s excited states.


title: MSbar Charm Mass from Charmonium Sum Rules with Contour Improvement

abstract:
  A detailed error analysis is carried out for the determination of the MSbar
charm quark mass $\bar m_c(\bar m_c)$ from moments at order alpha_s^2 of the
charm cross section in e^+e^- annihilation. To estimate the theoretical
uncertainties the renormalization scale is implemented in various ways
including energy-dependent functions, which lead to ``contour-improved''
predictions. We obtain $\bar m_c(\bar m_c)=1.29\pm 0.07$ GeV which contains a
substantial theoretical uncertainty.


title: RHIC data and the multichain Monte Carlo DPMJET-II

abstract:
  Using data from RHIC we are able to systematically improve the two-component
Dual Parton Model (DPM) event generator DPMJET-III. Introducing percolation
parametrized as fusion of chains the model describes multiplicities and
pseudorapidity distributions in nucleus-nucleus collisions at all centralities.
Guided by the d-Au data from RHIC we recalibrate the model to obtain collision
scaling in h-A and d-A collisions.


title:
The Gold-plated mode revisited: sin(2 beta) and B^0 to J/Psi K_S in the
  Standard Model

abstract:
  We study the corrections to the determination of sin(2 beta) from the time
dependent CP asymmetry of B^0 to J/Psi K_S which arise in the standard model.
Although a precise prediction of these corrections is not possible we find that
they are indeed extremely small, of the order of less than a per mil of the
observed value. This means in turn that any deviation visible at the B
factories will be a clear signal for new physics.


title: Testing the Leptogenesis Mechanism of the Seesaw Model

abstract:
  The seesaw theory, the leading theory for particle interactions, provides a
viable mechanism for generating the matter-antimatter asymmetry of the
universe. Testing the leptogenesis mechanism directly requires measurement of
the d=6 operator of the low-energy effective Lagrangian, in addition to the
more familiar d=5 operator which generates Majorana masses for the light
neutrinos when the electroweak symmetry is spontaneously broken. This important
experimental challenge awaits the next generation of particle physicists.


title: Exploring Supersymmetry at a Future Global e+e- Linear Collider

abstract:
  This review illustrates by means of sample reactions the potential of a
future global e+e- Linear Collider (LC) for precision measurements of
Supersymmetric particles with emphasis on recent studies and addressing major
research directions.


title: Neutrino Oscillations and Lorentz Violation

abstract:
  Existing experimental data for neutrino oscillations are consistent with
Lorentz-violating massless neutrinos. This talk summarizes some aspects of
neutrino oscillations from the perspective of Lorentz and CPT violation in
effective quantum field theory.


title: Jet tomography

abstract:
  I summarize the recent advances in jet tomographic studies of cold and hot
nuclear matter based on perturbative QCD calculations of medium-induced gluon
bremsstrahlung. Quantitative applications to ultrarelativistic heavy ion
reactions at RHIC indicate the creation of a deconfined state of QCD with
initial energy density on the order of 100 times cold nuclear matter density.


title: Super- and CP-symmetric QCD in Higher Dimensions

abstract:
  An extremely precise global symmetry is necessary in the Peccei--Quinn
solution to the strong CP problem. Such symmetry arises when colored chiral
fermions are localized in an internal space. We present a supersymmetric model
that incorporates the above mechanism. Extra colored chiral multiplets around
the supersymmetry-breaking scale are a generic prediction of the supersymetric
model.


title:
Quark description of the Nambu-Goldstone bosons in the color-flavor
  locked phase

abstract:
  We investigate the color-singlet order parameters and the quark description
of the Nambu-Goldstone (NG) bosons in the color-flavor locked (CFL) phase. We
put emphasis on the NG boson (phason) called ``H'' associated with the
$\mathrm{U_B(1)}$ symmetry breaking. We qualitatively argue the nature of H as
the second sound in the hydrodynamic regime. We articulate, based on a diquark
picture, how the structural change of the condensates and the associated NG
bosons occurs continuously from hadronic to CFL quark matter if the
quark-hadron continuity is realized. We sharpen the qualitative difference
between the flavor octet pions and the singlet phason. We propose a conjecture
that superfluid H matter undergoes a crossover to a superconductor with
tightly-bound diquarks, and then a crossover to superconducting matter with
diquarks dissociated.


title: String production after angled brane inflation

abstract:
  We describe string production after angled brane inflation. First, we point
out that there was a discrepancy in previous discussions. The expected tension
of the cosmic string calculated from the four-dimensional effective Lagrangian
did not match the one obtained in the brane analysis. In the previous analysis,
the cosmic string is assumed to correspond to the lower-dimensional daughter
brane, which wraps the same compactified space as the original mother brane. In
this case, however, the tension of the daughter brane cannot depend on the
angle (\theta). On the other hand, from the analysis of the effective
Lagrangian for tachyon condensation, it is easy to see that the tension of the
cosmic string must be proportional to \theta, when \theta << 1. This is an
obvious discrepancy that must be explained by consideration of the explicit
brane dynamics. In this paper, we will solve this problem by introducing a
simple idea. We calculate the tension of the string in the two cases, which
matches precisely. The cosmological constraint for angled inflation is relaxed,
because the expected tension of the cosmic string becomes smaller than the one
obtained in previous arguments, by a factor of \theta.


title:
The Narrow $\Theta_5$ Pentaquark As The First Non-planar Hadron With the
  Diamond Structure And Negative Parity

abstract:
  Using the picture of the flux tube model, we propose that the $\Theta_5$
pentaquark as the first candidate of the three-dimensional non-planar hadron
with the extremely stable diamond structure. The up and down quarks lie at the
corners of the diamond while the anti-strange quark sits in the center. Various
un-excited color flux tubes between the five quarks bind them into a stable and
narrow color-singlet. Such a configuration allows the lowest state having the
negative parity naturally. The decay of the $\Theta_5$ pentaquark into the
nucleon and kaon requires the breakup of the non-planar diamond configuration
into two conventional planar hadrons, which involves some kind of structural
phase transition as in the condensed matter physics. Hence the width of the
$\Theta^+$ pentaquark should be narrow despite that it lies above the kaon
nucleon threshold. We suggest that future lattice QCD calculation adopt
non-planar interpolating currents to explore the underlying structure of the
$\Theta_5$ pentaquark.


title:
Towards the unified description of light and heavy hadrons in the bag
  model approach

abstract:
  Mass spectra of ground state hadrons containing u-, d-, s-, c-quarks as well
as some lightest hadrons containing b-quarks are calculated on the basis of a
slightly modified bag model. The center-of-mass motion corrections are
incorporated using a wavepacket projection with Gaussian parametrization of the
distribution amplitude. We use running coupling constant and also allow the
effective quark mass to be scale-dependent. The impact of these modifications
on the hadron mass spectrum is investigated. A comparison of the predicted mass
values with the experimental data demonstrates that the modified bag model is
sufficiently flexible to provide a satisfactory description of light and heavy
hadrons (mesons and baryons) in a single consistent framework.


title:
Aspects of universal extra dimensional models and their latticized
  versions

abstract:
  In this work some aspects of models with universal extra dimensions are
studied. In particular, in the case of models with one universal extra
dimension their phenomenology is investigated and used to extract bounds on the
size of the extra dimension. In addition, the phenomenology of their latticized
counterparts is also investigated. The running of the gauge coupling constants
in models with an arbitrary number of universal extra dimensions is revisited.
The possible reliable determination of the power corrections that appear is
studied. Finally, a model with one non-universal extra dimension is presented
to compare the results in these kind of scenarios with the universal ones.


title: Lepton MHD and magnetic field generation in SM

abstract:
  We derive a total set of MHD equations in SM describing evolution of a dense
plasma with neutrinos. First this is done for a hot pair plasma consisting of
electrons and positrons, neutrinos and antineutrinos of all flavors in an
isotropic medium like the early universe plasma at the lepton stage. Then we
find how axial vector currents violating parity in SM contribute to MHD for a
slightly polarized (anisotropic) plasma where a new mechanism for the
amplification of mean magnetic fields arises due to the collective
neutrino-plasma interactions instead of assumed asymmetry of fluid velocity
vortices leading to the same effect of $\alpha^2$-dynamo.


title:
Covariant tensor formalism for partial wave analyses of $\psi$ decays
  into $\gamma\gamma V$

abstract:
  The double radiative decays $\psi\to\gamma\gamma V$ with $V\equiv
\rho,\omega,\phi$ have a potential to provide information on the flavor content
of any meson resonances (R) with positive charge parity ($C=+$) and mass above
1 GeV through $\psi\to\gamma R \to\gamma\gamma V$. To get the information, one
needs both high statistic data and partial wave analysis (PWA). While high
statistic data will be available soon at CLEO-c and BES-III, here we provide
theoretical PWA formulae for these $\psi$ double radiative decay channels in
the covariant tensor formalism.


title:
D meson enhancement in pp collisions at the LHC due to nonlinear gluon
  evolution

abstract:
  When nonlinear effects on the gluon evolution are included with constraints
from HERA, the gluon distribution in the free proton is enhanced at low
momentum fractions, x < 0.01, and low scales, Q^2 < 10 GeV^2, relative to
standard, DGLAP-evolved, gluon distributions. Consequently, such gluon
distributions can enhance charm production in pp collisions at center of mass
energy 14 TeV by up to a factor of five at midrapidity, y \sim 0, and
transverse momentum p_T -> 0 in the most optimistic case. We show that most of
this enhancement survives hadronization into D mesons. Assuming the same
enhancement at leading and next-to-leading order, we show that the D
enhancement may be measured by D^0 reconstruction in the K^-\pi^+ decay channel
with the ALICE detector.


title:
Supersymmetry Tests from a Combined Analysis of Chargino and Charged
  Higgs Boson Pair Production at a 1 TeV Linear Collider

abstract:
  We consider the production of chargino and charged Higgs boson pairs at
future linear colliders for c.m. energies in the one TeV range. Working in the
MSSM under the assumption of a "moderately" light SUSY scenario, we compute the
leading (double) and next-to leading (linear) supersymmetric logarithmic terms
of the so-called "Sudakov expansion" at one loop. We show that a combined
analysis of the slopes of the chargino and of the charged Higgs production
cross sections would offer a simple possibility for determining $\tan\beta$ for
large ($\gtrsim 10$) values and an allowed strip in the ($M_2,\mu$) plane. This
could provide a strong consistency test of the considered supersymmetric model.


title:
Les Houches 'Physics at Tev Colliders 2003' QCD/SM Working Group:
  Summary Report

abstract:
  This report documents the results obtained by the Working Group on Quantum
Chromodynamics and the Standard Model for the Workshop `Physics at TeV
Colliders'', Les Houches, France, 26 May - 6 June 2003. After a Monte Guide
description, the first contributions report on progress in describing multiple
interactions, important for the LHC, and underlying events. An announcement of
a Monte Carlo database, under construction, is then followed by a number of
contributions improving parton shower descriptions. Subsequently, a large
number of contributions address resummations in various forms, after which
follow studies of QCD effects in pion pair, top quark pair and photon pair plus
jet production. After a study of electroweak corrections to hadronic precision
observables, the report ends by presenting recent progress in methods to
compute finite order corrections at one-loop with many legs, and at two-loop.


title: Turbulent Thermalization

abstract:
  We study, analytically and with lattice simulations, the decay of coherent
field oscillations and the subsequent thermalization of the resulting
stochastic classical wave-field. The problem of reheating of the Universe after
inflation constitutes our prime motivation and application of the results. We
identify three different stages of these processes. During the initial stage of
``parametric resonance'', only a small fraction of the initial inflaton energy
is transferred to fluctuations in the physically relevant case of sufficiently
large couplings. A major fraction is transfered in the prompt regime of driven
turbulence. The subsequent long stage of thermalization classifies as free
turbulence. During the turbulent stages, the evolution of particle distribution
functions is self-similar. We show that wave kinetic theory successfully
describes the late stages of our lattice calculation. Our analytical results
are general and give estimates of reheating time and temperature in terms of
coupling constants and initial inflaton amplitude.


title:
Effect of polarized gluon distribution on spin asymmetries for neutral
  and charged pion production

abstract:
  A longitudinal double spin asymmetry for \pi^0 production has been measured
by the PHENIX collaboration. The asymmetry is sensitive to the polarized gluon
distribution and is indicated to be positive by theoretical predictions. We
study a correlation between behavior of the asymmetry and polarized gluon
distribution in neutral and charged pion production at RHIC.


title:
Cronin effect and high-p_T suppression in the nuclear gluon distribution
  at small x

abstract:
  We present a systematic, and fully analytic, study of the ratio R_{pA}
between the gluon distribution in a nucleus and that in a proton scaled up by
the atomic number A. We consider initial conditions of the McLerran-Venugopalan
type, and quantum evolution in the Color Glass Condensate, with both fixed and
running coupling. We perform an analytic study of the Cronin effect in the
initial conditions and point out an interesting difference between saturating
effects and twist effects in the nuclear gluon distribution. We show that the
distribution of the gluons which make up the condensate in the initial
conditions is localized at low momenta, but this particular feature does not
survive after the quantum evolution. We demonstrate that the rapid suppression
of the ratio R_{pA} in the early stages of the evolution is due to the
DGLAP-like evolution of the proton, whose gluon distribution grows much faster
than that in the nucleus because of the large separation between the respective
saturation momenta. The flattening of the Cronin peak, on the other hand, is
due to the evolution of the nucleus. We show that the running coupling effects
slow down the evolution, but eventually lead to a stronger suppression in
R_{pA} at sufficiently large energies.


title:
A Comparison Between An Ultra-Relativistic Au+Au Collision and the
  Primordial Universe

abstract:
  Ultra-relativistic nucleus-nucleus collisions create a state of matter of
high temperature and small baryo-chemical potential, which is similar to the
thermodynamical conditions in the primordial universe. Recent analyses of Au+Au
collisions at RHIC revealed the temperature, size and density of the system.
Thus, a comparison to the primordial universe can be attempted. In particular,
two observables shall be investigated, namely (1) the temperature at baryon
freeze-out (about t=10 fm/c in the $Au$ + $Au$ collision) and (2) the matter
density at the partonic stage (t>1 fm/c).


title: Exotic Fermions and Bosons in the Quartification Model

abstract:
  Exotic fermions of half-integral charges at the TeV energy scale are
predicted by the quartification model of Babu, Ma, and Willenbrock. We add to
these one copy of their scalar analogs and discuss the ensuing phenomenological
implications, i.e. radiative contributions to lepton masses and flavor-changing
leptonic decays.


title:
Dynamical Gauge Symmetry Breaking and Mass Generation on the Orbifold
  T^2/Z_2

abstract:
  Dynamical gauge symmetry breaking on the orbifold $T^2/Z_2$ is shown to occur
through quantum dynamics of Wilson line phases. Different sets of boundary
conditions on $T^2/Z_2$ can be related to each other by Wilson line phases,
forming equivalence classes. The effective potential for Wilson line phases is
evaluated at the one loop level in SU(2) gauge theory. Depending on the fermion
content, the SU(2) symmetry can be broken either completely or partially to
U(1) without introducing additional Higgs scalar fields. When SU(2) is
completely broken, each of three components of the gauge fields may acquire a
distinct mass. Masses are generated through the combination of $T^2$ twists and
dynamics of Wilson line phases.


title: Particle and spin motion in polarized media

abstract:
  Quantum mechanical equations of motion are obtained for particles and spin in
media with polarized electrons in the presence of external fields. The motion
of electrons and their spins is governed by the exchange interaction, while the
motion of positrons and their spins is governed by the annihilation
interaction. The equations obtained describe the motion of particles and spin
in both magnetic and nonmagnetic media. The evolution of positronium spin in
polarized media is investigated. Media with polarized electrons can be used for
polarization of positronium beams.


title:
Gauge invariant effective action for the Polyakov line in the SU(N)
  Yang--Mills theory at high temperatures

abstract:
  We integrate out fast varying quantum fluctuations around static A_4 and A_i
fields for the SU(N) gauge group. By assuming that the gluon fields are slowly
varying but allowing for an arbitrary amplitude of A_4 we obtain two variants
of the effective high-temperature theory for the Polyakov line. One is the
effective action for the gauge-invariant eigenvalues of the Polyakov line, and
it is explicitly Z(N) symmetric. The other is the effective action for the
Polyakov line itself as an element of the SU(N). In this case the theory
necessarily includes the spatial components A_i to ensure its gauge invariance
under spatial gauge transformations. We derive the 1-loop effective action in
the `electric' and `magnetic' sectors, summing up all powers of A_4.


title:
Non-equilibrium Critical Dynamics and Precursory Phenomena in Color
  Superconductivity

abstract:
  We derive an effective equation to describe the non-equilibrium dynamics of
the pair field of color superconductivity near the critical temperature. We
also discuss how critical dynamics affects the specific heat and density of
state above the critical temperature.


title:
Polarization of Tau Leptons Produced in Quasielastic Neutrino--Nucleon
  Scattering

abstract:
  A numerical analysis of the polarization vector of tau leptons produced
through quasielastic neutrino and antineutrino interactions with free nucleons
is given with two models for vector electromagnetic form factors of proton and
neutron. The impact of G parity violating axial and vector second-class
currents is investigated by applying a simple heuristic model for the induced
scalar and tensor form factors.


title:
QED processes in peripheral kinematics at polarized photon-photon and
  photon-electron colliders

abstract:
  The calibration QED process cross sections for experiments on planned
electron-photon and photon-photon colliders for detecting the small angles
scattered particles are calculated. These processes describe the creation of
two jets moving sufficiently close to the beam axis directions. The jets
containing two and three particles including charged leptons, photons and
pseudoscalar mesons are considered explicitly. Considering the pair production
subprocesses we take into account both bremsstrahlung and double photon
mechanisms. The obtained results are suitable for further numerical
calculations.


title: Generalized Weinberg Sum Rules in Deconstructed QCD

abstract:
  Recently, Son and Stephanov have considered an "open moose" as a possible
dual model of a QCD-like theory of chiral symmetry breaking. In this note we
demonstrate that although the Weinberg sum rules are satisfied in any such
model, the relevant sums converge very slowly and in a manner unlike QCD.
Further, we show that such a model satisfies a set of generalized sum rules.
These sum rules can be understood by looking at the operator product expansion
for the correlation function of chiral currents, and correspond to the absence
of low-dimension gauge-invariant chiral symmetry breaking condensates. These
results imply that, regardless of the couplings and F-constants chosen, the
open moose is not the dual of any QCD-like theory of chiral symmetry breaking.
We also show that the generalized sum rules can be "solved", leading to a
compact expression for the difference of vector- and axial-current correlation
functions. This expression allows for a simple formula for the S parameter
(L_10), which implies that S is always positive and of order one in any
(unitary) open linear moose model. Therefore the S parameter is positive and
order one in any "Higgsless model" based on the continuum limit of a linear
moose regardless of the warping or position-dependent gauge-coupling chosen.


title: CompHEP 4.4 - Automatic Computations from Lagrangians to Events

abstract:
  We present a new version of the CompHEP program (version 4.4). We describe
shortly new issues implemented in this version, namely, simplification of quark
flavor combinatorics for the evaluation of hadronic processes, Les Houches
Accord based CompHEP-PYTHIA interface, processing the color configurations of
events, implementation of MSSM, symbolical and numerical batch modes, etc. We
discuss how the CompHEP program is used for preparing event generators for
various physical processes. We mention a few concrete physics examples for
CompHEP based generators prepared for the LHC and Tevatron.


title:
Accessing transversity via J/Psi production in polarized p-pbar
  interactions

abstract:
  We discuss the possibility of a direct access to transversity distributions
by measuring the double transverse spin asymmetry A_TT in p pbar --> J/Psi + X
--> l^- l^+ + X processes at future GSI-HESR experiments with polarized protons
and anti-protons. In the J/Psi resonance production region, with 30 < s < 45
GeV^2, both the cross-section and A_TT are expected to be sufficiently large to
allow a measurement of h_1^q(x,M^2); numerical estimates are given.


title: Probing mSUGRA via the Extreme Universe Space Observatory

abstract:
  An analysis is carried out within mSUGRA of the estimated number of events
originating from upward moving ultra-high energy neutralinos that could be
detected by the Extreme Universe Space Observatory (EUSO). The analysis
exploits a recently proposed technique that differentiates ultra-high energy
neutralinos from ultra-high energy neutrinos using their different absorption
lengths in the Earth's crust. It is shown that for a significant part of the
parameter space, where the neutralino is mostly a Bino and with squark mass
$\sim 1$ TeV, EUSO could see ultra-high energy neutralino events with
essentially no background. In the energy range 10^9 GeV < E < 10^11 GeV, the
unprecedented aperture of EUSO makes the telescope sensitive to neutralino
fluxes as low as 1.1 \times 10^{-6} (E/GeV)^{-1.3} GeV^{-1} cm^{-2} yr^{-1}
sr^{-1}, at the 95% CL. Such a hard spectrum is characteristic of supermassive
particles' $N$-body hadronic decay. The case in which the flux of ultra-high
energy neutralinos is produced via decay of metastable heavy particles with
uniform distribution throughout the universe is analyzed in detail. The
normalization of the ratio of the relics' density to their lifetime has been
fixed so that the baryon flux produced in the supermassive particle decays
contributes to about 1/3 of the events reported by the AGASA Collaboration
below 10^{11} GeV, and hence the associated GeV gamma-ray flux is in complete
agreement with EGRET data. For this particular case, EUSO will collect between
4 and 5 neutralino events (with 0.3 of background) in ~ 3 yr of running. NASA's
planned mission, the Orbiting Wide-angle Light-collectors (OWL), is also
briefly discussed in this context.


title: Lorentz and CPT Violation in the Higgs Sector

abstract:
  Colladay and Kostelecky have proposed a framework for studying Lorentz and
CPT violation in a natural extension of the Standard Model. Although numerous
bounds exist on the Lorentz and CPT violating parameters in the gauge boson and
fermion sectors, there are no published bounds on the parameters in the Higgs
sector. We determine these bounds. The bounds on the CPT-even asymmetric
coefficients arise from the one-loop contributions to the photon propagator,
those from the CPT-even symmetric coefficients arise from the equivalent
c_{\mu\nu} coefficients in the fermion sector, and those from the CPT-odd
coefficient arise from bounds on the vacuum expectation value of the Z-boson.


title: Detection of Supernova Neutrinos

abstract:
  Matter effects on neutrino oscillations in both, a supernova and the Earth,
change the observed supernova neutrino spectra. We calculate the expected
number of supernova neutrino interactions for ICARUS, SK and SNO detectors as a
function of the distance which they traveled in the Earth. Calculations are
performed for supernova type II at 10kpc from the Earth, using standard
supernova neutrino fluxes described by thermal Fermi--Dirac distributions and
the PREM I Earth matter density profile.


title: Quark model description of hadrons

abstract:
  In this contribution I will try to give an overview of what has been achieved
in constituent quark models of mesons and baryons by a comparison of some
selected results from various ansaetze with experimental data. In particular I
will address the role of relativistic covariance, the nature of the effective
quark forces, the status of results on electromagnetic and strong-decay
observables beyond the mere mass spectra, as well as some unresolved issues in
hadron spectroscopy.


title: Axial form factor of the nucleon in the perturbative chiral quark model

abstract:
  We apply the perturbative chiral quark model (PCQM) at one loop to analyze
the axial form factor of the nucleon. This chiral quark model is based on an
effective Lagrangian, where baryons are described by relativistic valence
quarks and a perturbative cloud of Goldstone bosons as dictated by chiral
symmetry. We apply the formalism to obtain analytical expressions for the axial
form factor of the nucleon, which is given in terms of fundamental parameters
of low-energy pion-nucleon physics (weak pion decay constant, strong
pion-nucleon form factor) and of only one model parameter (radius of the
nucleonic three-quark core).


title: pi^+ - pi^0 mass difference from the Bethe-Salpeter equation

abstract:
  In the framework of the Schwinger-Dyson equation and the Bethe-Salpeter
equation in the improved ladder approximation, we calculate the pi^+ - pi^0
mass difference on the same footing as the pion decay constant and the QCD S
parameter (or L_{10}) through the difference between the vector current
correlator \Pi_{VV} and the axial-vector current correlator \Pi_{AA}. We find
that all the results can be fit to the experimental values for rather large
Lambda_{QCD} \sim 700 MeV which reflects the ``scale ambiguity''. By fitting to
the calculated data using the pole saturated form of \Pi_{VV} - \Pi_{AA}, we
also derive masses and decay constants of rho meson and a_1 meson, which we
found are consistent with the experiments rather insensitively to the ``scale
ambiguity''.


title:
Nucleon contribution to the induced charge of neutrinos in a matter
  background and a magnetic field

abstract:
  We study the nucleon contribution to the electromagnetic vertex function of
neutrinos that propagate in a matter background in the presence of a magnetic
field. Starting from the one-loop expression for the corresponding terms of the
vertex function, and taking into account the anomalous magnetic coupling of the
nucleons, we calculate the B-dependent part of the form factors that determine
the induced charge of the neutrino. A formula for the neutrino induced charge
is obtained, and it is evaluated for various illustrative situations. The terms
due to the nucleons can be important in some cases, depending on the physical
conditions of the environment.


title:
Laurent series expansion of sunrise-type diagrams using configuration
  space techniques

abstract:
  We show that configuration space techniques can be used to efficiently
calculate the complete Laurent series \eps-expansion of sunrise-type diagrams
to any loop order in D-dimensional space-time for any external momentum and for
arbitrary mass configurations. For negative powers of \eps the results are
obtained in analytical form. For positive powers of \eps including the finite
\eps^0 contribution the result is obtained numerically in terms of
low-dimensional integrals. We present general features of the calculation and
provide exemplary results up to five loop order which are compared to available
results in the literature.


title:
Decay $\phi (1020)\to \gamma f_0(980)$: analysis in the non-relativistic
  quark model approach

abstract:
  We demonstrate the possibility of a good description of the processes $\phi
(1020)\to \gamma\pi\pi$ and $\phi (1020)\to \gamma f_0(980)$ within the
framework of non-relativistic quark model assuming $f_0(980)$ to be dominantly
quark--antiquark system. Different mechanisms of the radiative decay, that is,
the emission of photon by the constituent quark (additive quark model) and
charge-exchange current, are considered. We also discuss the status of the
threshold theorem applied to the studied reactions, namely, the behaviour of
the decay amplitude at $M_{\pi\pi} \to m_\phi$ and $m_{f_0}\to m_\phi$. In
conclusion the arguments favouring the $q\bar q$ origin of $f_0(980)$ are
listed.


title:
Transversity distribution function in hard scattering of polarized
  protons and antiprotons in the PAX experiment

abstract:
  Estimates are given for the double spin asymmetry in lepton pair production
from collisions of transversely polarized protons and antiprotons for the
kinematics of the recently proposed PAX experiment at GSI on the basis of
predictions for the transversity distribution from the chiral quark soliton
model.


title: Pion-Nucleon Scattering Relations at Next-to-Leading Order in 1/N_c

abstract:
  We obtain relations between partial-wave amplitudes for pi-N-->pi-N and
pi-N-->pi-Delta directly from large N_c QCD. While linear relations among
certain amplitudes holding at leading order (LO) in 1/N_c were derived in the
context of chiral soliton models two decades ago, the present work employs a
fully model-independent framework based on consistency with the large N_c
expansion. At LO we reproduce the soliton model results; however, this method
allows for systematic corrections. At next-to-leading order (NLO), most
relations require additional unknown functions beyond those appearing at
leading order (LO) and thus have little additional predictive power. However,
three NLO relations for the pi-N-->pi-Delta reaction are independent of unknown
functions and make predictions accurate at this order. The amplitudes relevant
to two of these relations were previously extracted from experiment. These
relations describe experiment dramatically better than their LO counterparts.


title: Probing small-x gluons by low-mass Drell-Yan pairs at RHIC and LHC

abstract:
  We calculate the transverse momentum distribution of low-mass Drell-Yan pairs
in QCD perturbation theory with all-order resummation. We demonstrate that the
transverse momentum distribution of low-mass Drell-Yan pairs is an advantageous
source of constraints on the gluon distribution and its nuclear dependence.
With the reduction in background, we argue that low-mass Drell-Yan pairs in the
forward region provide a good and clean probe of small-x gluons at RHIC and
LHC.


title: Towards a Theory of Binary Bound States in the Quark-Gluon Plasma

abstract:
  Although at temperatures $T\gg \Lambda_{QCD}$ the quark-gluon plasma (QGP) is
a gas of weakly interacting quasiparticles (modulo long-range magnetism), it is
strongly interacting in the regime $T=(1-3) T_c$. As both heavy ion experiments
and lattice simulations are now showing, in this region the QGP displays rather
strong interactions between the constituents. In this paper we investigate the
relationship between four (previously disconnected) lattice results: {\bf i.}
spectral densities from MEM analysis of correlators; {\bf ii.} static quark
free energies $F(R)$; {\bf iii.} quasiparticle masses; {\bf iv.} bulk
thermodynamics $p(T)$. We show a high degree of consistency among them not
known before. The potentials $V(R)$ derived from $F(R)$ lead to large number of
binary bound states, mostly colored, in $gq, qq, gg$, on top of the usual $\bar
q q$ mesons. Using the Klein-Gordon equation and ({\bf ii-iii}) we evaluate
their binding energies and locate the zero binding endpoints on the phase
diagram, which happen to agree with ({\bf i}). We then estimate the
contribution of all states to the bulk thermodynamics in agreement with ({\bf
iv}). We also address a number of theoreticall issues related with to the role
of the quark/gluon spin in binding at large $\alpha_s$, although we do not yet
include those in our estimates. Also the issue of the transport properties
(viscosity, color conductivity) in this novel description of the QGP will be
addressed elsewhere.


title:
Subtraction Terms for Hadronic Production Processes at
  Next-to-Next-to-Leading Order

abstract:
  I describe a subtraction scheme for the next-to-next-to-leading order
calculation of single inclusive production at hadron colliders. Such processes
include Drell-Yan, W^{+/-}, Z and Higgs Boson production. The key to such a
calculation is a treatment of initial state radiation which preserves the
production characteristics, such as the rapidity distribution, of the process
involved. The method builds upon the Dipole Formalism and, with proper
modifications, could be applied to deep inelastic scattering and e^+ e^-
annihilation to hadrons.


title: Primordial fluctuations and cosmological inflation after WMAP 1.0

abstract:
  The observational constraints on the primordial power spectrum have tightened
considerably with the release of the first year analysis of the WMAP
observations, especially when combined with the results from other CMB
experiments and galaxy redshift surveys. These observations allow us to
constrain the physics of cosmological inflation: (i) The data show that the
Hubble distance is almost constant during inflation. While observable modes
cross the Hubble scale, it changes by less than 3% during one e-folding:
d(d_H)/dt < 0.032 at 2 sigma. The distance scale of inflation itself remains
poorly constrained: 1.2 x 10^{-28} cm < d_H < 1 cm. (ii) We present a new
classification of single-field inflationary scenarios (including scenarios
beyond slow-roll inflation), based on physical criteria, namely the behaviour
of the kinetic and total energy densities of the inflaton field. The current
data show no preference for any of the scenarios. (iii) For the first time the
slow-roll assumption could be dropped from the data analysis and replaced by
the more general assumption that the Hubble scale is (almost) constant during
the observable part of inflation. We present simple analytic expressions for
the scalar and tensor power spectra for this very general class of inflation
models and test their accuracy.


title:
Enhanced charm hadroproduction due to nonlinear corrections to the DGLAP
  equations

abstract:
  We have studied the effects of nonlinear scale evolution of the parton
distribution functions to charm production in $pp$ collisions at center-of-mass
energies of 5.5, 8.8 and 14 TeV. We find that the differential charm cross
section can be enhanced up to a factor of 4-5 at low $p_T$. The enhancement is
quite sensitive to the charm quark mass and the renormalization/factorization
scales.


title:
Charged pion polarizability in the nonlocal quark model of
  Nambu-Jona-Lasinio type

abstract:
  The polarizability of a charged pion is estimated in the framework of the
nonlocal chiral quark model of the Nambu--Jona-Lasinio type. Nonlocality is
described by quark form factors of the Gaussian type. It is shown that the
polarizability in this model is very sensitive to the form of nonlocality and
choice of the model parameters.


title: Variation of radiation length due to LPM effect

abstract:
  The photon emission intensity spectrum is calculated taking into account
influence of multiple scattering (the LPM effect) under conditions of recent
CERN SPS experiment. It is shown that the theory quite satisfactory describes
data. The integral characteristics: the radiation length and total probability
of photon emission are analyzed under influence of the LPM effect, and the
asymptotic expansions of these characteristics are derived.


title: Reconstructing Supersymmetric Theories by Coherent LHC / LC Analyses

abstract:
  Supersymmetry analyses will potentially be a central area for experiments at
the LHC and at a future e+ e- linear collider. Results from the two facilities
will mutually complement and augment each other so that a comprehensive and
precise picture of the supersymmetric world can be developed. We will
demonstrate in this report how coherent analyses at LHC and LC experiments can
be used to explore the breaking mechanism of supersymmetry and to reconstruct
the fundamental theory at high energies, in particular at the grand unification
scale. This will be exemplified for minimal supergravity in detailed
experimental simulations performed for the Snowmass reference point SPS1a.


title:
Effects of non-standard neutrino interactions on MSW-LMA solution to the
  solar neutrino problem

abstract:
  We show that the non-standard neutrino interactions can play a role as
sub-leading effect on the solar neutrino oscillations. We observe that very
small flavor universality violations of order of 0.1-0.2 G_F is sufficient to
induce two phenomena: suppression of the eletronic neutrino earth regeneration
and a shift of the resonance layer in the sun. We obtain these phenomena even
in the absence of any flavor changing interactions. We discuss their
consequences and confront with a global analysis of solar+KamLAND results. We
conclude that a new compatibility region in the Delta m^2 x tan^2\theta, which
we call very low Large Mixing Angle region, is found for Delta m^2 ~ 1e-5 eV^2
and tan^2\theta= 0.45.


title:
The longitudinal structure function F_L: perturbative QCD and
  k_T-factorization versus experimental data at fixed W

abstract:
  We use results for the structure functions $F_L$ for a gluon target having
nonzero transverse momentum square at order $\alpha_s$, obtained in our
previous paper, to compare with recent H1 experimental data for $F_L$ at fixwd
W values and with collinear GRV predictions at LO and NLO approximation.


title:
Covariant tensor formalism for partial wave analyses of $\psi$ decays
  into $\gamma B\bar B$

abstract:
  Recently BES2 collaboration observed an enhancement near the $p\bar p$
invariant mass spectrum. Using the covariant tensor formalism, here we provide
theoretical formulae for the partial wave analysis (PWA) of the $\psi$
radiative decay channels $\psi \to \gamma p\bar p, \gamma\Lambda\bar \Lambda,
\gamma\Sigma \bar\Sigma, \gamma\Xi\bar \Xi$ . By performing the Monte Carlo
simulation, we give the angular distributions for the photon and proton in the
process of $J/\psi \to \gamma p\bar p$, which may serve as a useful reference
for the future PWA on these channels.


title: An Interesting NMSSM Scenario at the LHC and LC

abstract:
  The Next-to-Minimal Supersymmetric Standard Model NMSSM provides an
attractive extension to the minimal supersymmetric model by including an extra
Higgs singlet superfield. This extension allows one to link the Higgs-higgsino
mass parameter to a vacuum expectation value of the new scalar field, thus
providing a solution to the mu-problem of the MSSM. It this report, presented
within the context of the LHC / LC Study Group, we examine a particularly
interesting NMSSM scenario where the extra Higgs scalar is rather light. We
determine LHC production cross-sections and branching ratios for the lightest
scalar and find that it will be difficult to observe at the LHC. However, we
show that this lightest scalar can instead be observed at an electron-positron
Linear Collider for all but a small window of parameter space.


title:
Determination of the Higgs-boson couplings and H-A mixing in the
  generalized SM-like Two Higgs Doublet Model

abstract:
  The feasibility of measuring the Higgs-boson properties at the Photon
Collider at TESLA has been studied in detail for masses between 200 and 350
GeV, using realistic luminosity spectra and detector simulation. We consider
the Two Higgs Doublet Model (II) with SM-like Yukawa couplings for h,
parametrized by only one parameter (tan(beta)). The combined measurement of the
invariant-mass distributions in the ZZ and W+W- decay-channels is sensitive to
both the two-photon width Gamma_{gamma gamma} and phase Phi_{gamma gamma}. From
the analysis including systematic uncertainties we found out that after one
year of Photon Collider running with nominal luminosity the expected precision
in the measurement of tan(beta) is of the order of 10%, for both light (h) and
heavy (H) scalar Higgs bosons. The H-A mixing angle Phi_{HA}, characterizing a
weak CP violation in the model with two Higgs doublets, can be determined to
about 100 mrad, for low tan(beta).


title:
Low Energy Chiral Lagrangian in Curved Space-Time from the Spectral
  Quark Model

abstract:
  We analyze the recently proposed Spectral Quark Model in the light of Chiral
Perturbation Theory in curved space-time. In particular, we calculate the
chiral coefficients $L_1, ..., L_{10}$, as well as the coefficients $L_{11}$,
$L_{12}$, and $L_{13}$, appearing when the model is coupled to gravity. The
analysis is carried for the SU(3) case. We analyze the pattern of chiral
symmetry breaking as well as elaborate on the fulfillment of anomalies.
Matching the model results to resonance meson exchange yields the relation
between the masses of the scalar, tensor and vector mesons,
$M_{f_0}=M_{f_2}=\sqrt{2} M_V= 4 \sqrt{3 /N_c} \pi f_\pi$. Finally, the
large-$N_c$ limit suggests the dual relations in the vector and scalar
channels, $M_V=M_S= 2 \sqrt{6 /N_c} \pi f_\pi $ and $<r^2 >^{1/2}_S = < r^2
>^{1/2}_V = 2 \sqrt{N_c} / f_\pi = 0.59 {\rm fm} $.


title:
Five-loop epsilon expansion for U(n)xU(m) models: finite-temperature
  phase transition in light QCD

abstract:
  We consider the U(n)xU(m) symmetric Phi^4 Lagrangian to describe the
finite-temperature phase transition in QCD in the limit of vanishing quark
masses with n=m=N_f flavors and unbroken anomaly at T_c. We compute the
Renormalization Group functions to five-loop order in Minimal Subtraction
scheme. Such higher order functions allow to describe accurately the
three-dimensional fixed-point structure in the plane (n,m), and to reconstruct
the line n^+(m,d) which limits the region of second-order phase transitions by
an expansion in epsilon=4-d. We always find n^+(m,3)>m, thus no
three-dimensional stable fixed point exists for $n=m$ and the finite
temperature transition in light QCD should be first-order. This result is
confirmed by the pseudo-epsilon analysis of massive six-loop three dimensional
series.


title: The Body Center Cubic Quark Lattice Model

abstract:
  The Standard Model while successful in many ways is incomplete; many
questions remain. The origin of quark masses and hadronization of quarks are
awaiting an answer. From the Dirac sea concept, we infer that two kinds of
elementary quarks (u(0) and d(0)) constitute a body center cubic (BCC) quark
lattice with a lattice constant a < $10^{-18}$m in the vacuum. Using energy
band theory and the BCC quark lattice, we can deduce the rest masses and the
intrinsic quantum numbers (I, S, C, b and Q) of quarks. With the quark
spectrum, we deduce a baryon spectrum. The theoretical spectrum is in agreement
well with the experimental results. Not only will this paper provide a physical
basis for the Quark Model, but also it will open a door to study the more
fundamental nature at distance scales <$10^{-18}$m. This paper predicts some
new quarks $u_{c}$(6490) and d$_{b}$(9950), and new baryons
$\Lambda_{c}^{+}$(6500), $\Lambda_{b}^{0}$(9960).


title:
Quantized Vibrations in Models of Dibaryons, Pentaquarks and Z*
  Resonances

abstract:
  The existence of quantized vibrations is utilized to explain narrow nucleon
resonances below the pion threshold. A Goldstone boson with a mass of 35 MeV is
derived from the experimental dibaryon masses. The quantum of 35 MeV is
recognized as part of the Nambu empirical mass series. We present a few
explanations to suggest why this light boson is difficult to locate in
experiments. The KARMEN timing anomaly is discussed. The vibration-rotational
model of elementary particles is reviewed in regards to the Diakonov-Petrov
argument against mixing of these modes. The existence of a theta(1640)D03
partner to the theta(1540)+ is predicted.


title: Warped Unification, Proton Stability and Dark Matter

abstract:
  Many extensions of the Standard Model have to face the problem of new
unsuppressed baryon-number violating interactions. In supersymmetry, the
simplest way to solve this problem is to assume R-parity conservation. As a
result, the lightest supersymmetric particle becomes stable and a
well-motivated dark matter candidate. In this paper, we show that solving the
problem of baryon number violation in non supersymmetric grand unified theories
(GUT's) in warped higher-dimensional spacetime can lead to a stable
Kaluza-Klein particle. This exotic particle has gauge quantum numbers of a
right-handed neutrino, but carries fractional baryon-number and is related to
the top quark within the higher-dimensional GUT. A combination of baryon-number
and SU(3) color ensures its stability. Its relic density can easily be of the
right value for masses in the 10 GeV--few TeV range. An exciting aspect of
these models is that the entire parameter space will be tested at near future
dark matter direct detection experiments. Other exotic GUT partners of the top
quark are also light and can be produced at high energy colliders with
distinctive signatures.


title: Flipped Cryptons and the UHECRs

abstract:
  Cryptons are metastable bound states of fractionally-charged particles that
arise generically in the hidden sectors of models derived from heterotic
string. We study their properties and decay modes in a specific flipped SU(5)
model with long-lived four-particle spin-zero bound states called {\it
tetrons}. We show that the neutral tetrons are metastable, and exhibit the
tenth-order non-renormalizable superpotential operators responsible for their
dominant decays. By analogy with QCD, we expect charged tetrons to be somewhat
heavier, and to decay relatively rapidly via lower-order interactions that we
also exhibit. The expected masses and lifetimes of the neutral tetrons make
them good candidates for cold dark matter (CDM), and a potential source of the
ultra-high energy cosmic rays (UHECRs) which have been observed, whereas the
charged tetrons would have decayed in the early Universe.


title: Quantum Chromodynamics and Hadrons: an Elementary Introduction

abstract:
  Notes of five lectures given at the 2003 European School of High-Energy
Physics, Tsakhkadzor, Armenia, September 2003


title:
The anti-decuplet candidate Xi--(1862) as a heptaquark with the overlap
  of two anti-kaons and a nucleon

abstract:
  I study the very recently discovered S=-2 resonance Xi--(1886) by the NA49
collaboration at the CERN SPS. This resonance was already predicted, with a
mass close to 1.9 GeV, in a recent publication mostly dedicated to the S=1
resonance Theta+(1540). To confirm this recent prediction, I apply the same
standard quark model with a quark-antiquark annihilation constrained by chiral
symmetry. This method also explained with success the repulsive hard core of
nucleon-nucleon, kaon-nucleon exotic scattering, and the short range attraction
present in pion-nucleon and pion-pion non-exotic scattering. I find that
repulsion excludes the Xi-- as a dd ss u/bar s-wave pentaquark. I explore the
Xi-- as a heptaquark, equivalent to a N+K+K linear molecule, with positive
parity and total isospin I=3/2. I find that the kaon-kaon repulsion is
cancelled by the attraction existing in the kaon-nucleon channels. In our
framework this state is easier to bind than the Theta+ described by a pi+K+N
borromean bound-state. The remaining I=1/2 doublet and I=1 triplet of the
exotic anti-decuplet are also studied, and the coupling to p-wave decay
channels is briefly addressed.


title:
Relation between color deconfinement and chiral restoration at finite
  temperature and density

abstract:
  We discuss the relation between color deconfinement characterized by the
Polyakov loop and chiral restoration characterized by the chiral condensate. We
clarify how and why these two phenomena should take place at the same
pseudo-critical temperature.


title: Radiative B decays in Supersymmetry without R-parity

abstract:
  We present a systematic analysis of all the contributions at the leading log
order to the branching ratio of the inclusive radiative B decay, B --> X_s +
gamma in the framework of supersymmetry without R-parity. The relevant set of
four-quark operators involved in QCD running are extended from 6 (within SM and
MSSM) to 24, with also many new contributions to the Wilson coefficients of
(chromo)magnetic penguins for either chiral structure. We present complete
analytical results here without any a priori assumptions on the form of
R-parity violation. Mass eigenstate expressions are given, hence the results
are free from the commonly adopted mass-insertion approximation. In the
numerical analysis, we focus here only on the influence of the trilinear
lambda-prime couplings and report on the possibility of a few orders of
magnitude improvement for the bounds on a few combinations of the lambda-prime
couplings. Our study shows that the Wilson coefficients of the current-current
operators due to R-parity violation dominate over the direct contributions to
the penguins. However, the inter-play of various contributions is complicated
due to the QCD corrections which we elaborate here.


title: Radiative Corrections to Neutrino-Nucleon Quasielastic Scattering

abstract:
  Full one-loop radiative corrections are calculated for low energy
neutrino-nucleon quasi-elastic scattering, $\bar \nu_{e}+p \longrightarrow
e^{+} + n$, which involves both Fermi and Gamow-Teller transitions, in the
static limit of nucleons. The calculation is performed for both angular
independent and dependent parts. We separate the corrections into the outer and
inner parts {\` a} la Sirlin. The outer part is infrared and ultraviolet
finite, and involves the positron velocity. The calculation of the outer part
is straightforward, but that of the inner part requires a scrutiny concerning
the continuation of the long-distance hadronic calculation to the
short-distance quark treatment and the dependence on the model of hadron
structure. We show that the logarithmically divergent parts do not depend on
the structure of hadrons not only for the Fermi part, but also for the
Gamow-Teller part. This observation enables us to deal with the inner part for
the Gamow-Teller transition nearly parallel to that for the Fermi transition.
The inner part is universal to weak charged-current processes and can be
absorbed into the modification of the coupling constants up to the order of the
inverse proton mass $O(1/m_{p})$. The resulting $O(\alpha)$ corrections to the
differential cross section take the form $ [1+\delta_{\rm out}(E)] [
(1+\delta_{\rm in}^{\rm F}) < 1 >^2 +g_A^2 (1+\delta_{\rm in}^{\rm GT}) < {\mib
\sigma} >^2]$, where $<1 >$ and $<{\mib \sigma}>$ stand for the Fermi and
Gamow-Teller matrix elements; the outer correction $\delta_{\rm out}$ is
positron energy ($E$) dependent and takes different functional forms for the
angular independent and dependent parts. All factors are explicitly evaluated.


title:
Proposal of a Simple Method to Estimate Neutrino Oscillation Probability
  and CP Violation in Matter

abstract:
  We study neutrino oscillation within the framework of three generations in
matter. We propose a simple method to approximate the coefficients A, B and C
which do not depend on the CP phase \delta in the oscillation probability
P(\nu_e \to \nu_{\mu})=A\cos \delta + B\sin \delta +C. An advantage of our
method is that an approximate formula of the coefficients A, B and C in
arbitrary matter {\it without the usual first order perturbative calculations}
of the small parameter \Delta m_{21}^2/\Delta m_{31}^2 or \sin \theta_{13} can
be derived. Furthermore we show that all the approximate formulas for low,
intermediate and high energy regions given by other authors in constant matter
can be easily derived from our formula. It means that our formula is applicable
over a wide energy region.


title:
Abnormal number of Nambu-Goldstone bosons in the color-asymmetric 2SC
  phase of an NJL-type model

abstract:
  We consider an extended Nambu--Jona-Lasinio model including both (q \bar q)-
and (qq)-interactions with two light-quark flavors in the presence of a single
(quark density) chemical potential. In the color superconducting phase of the
quark matter the color SU(3) symmetry is spontaneously broken down to SU(2). If
the usual counting of Goldstone bosons would apply, five Nambu-Goldstone (NG)
bosons corresponding to the five broken color generators should appear in the
mass spectrum. Unlike that expectation, we find only three gapless diquark
excitations of quark matter. One of them is an SU(2)-singlet, the remaining two
form an SU(2)-(anti)doublet and have a quadratic dispersion law in the small
momentum limit. These results are in agreement with the Nielsen-Chadha theorem,
according to which NG-bosons in Lorentz-noninvariant systems, having a
quadratic dispersion law, must be counted differently. The origin of the
abnormal number of NG-bosons is shown to be related to a nonvanishing
expectation value of the color charge operator Q_8 reflecting the lack of color
neutrality of the ground state. Finally, by requiring color neutrality, two
massive diquarks are argued to become massless, resulting in a normal number of
five NG-bosons with usual linear dispersion laws.


title: QCD in curved space-time: a conformal bag model

abstract:
  We construct an effective low energy Lagrangian of gluodynamics which (i)
satisfies all constraints imposed by the Renormalization Group; (ii) is scale
and conformally invariant in the limit of vanishing vacuum energy density;
(iii) matches onto the perturbative theory at short distances. This effective
theory has a dual description as classical gluodynamics on a curved conformal
background. Color fields are dynamically confined, and the strong coupling
freezes at distances larger than the glueball size. We also make specific
predictions (in particular, on the Nc dependence of glueball properties) which
can be tested in lattice simulations of gluodynamics.


title:
T-Dependent Dyson- Schwinger Equation In IR Regime Of QCD: The Critical
  Point

abstract:
  The quark mass function $\Sigma(p)$ in QCD is revisited, using a gluon
propagator in the form $1/(k^2 + m_g^2)$ plus $2\mu^2/ (k^2 + m_g^2)^2$, where
the second (IR) term gives linear confinement for $m_g = 0$ in the
instantaneous limit, $\mu$ being another scale. To find $\Sigma(p)$ we propose
a new (differential) form of the Dyson-Schwinger Equation (DSE) for
$\Sigma(p)$, based on an infinitesimal $subtractive$ Renormalization via a
differential operator which $lowers$ the degree of divergence in integration on
the RHS, by $TWO$ units. This warrants $\Sigma(p-k)\approx \Sigma(p)$ in the
integrand since its $k$-dependence is no longer sensitive to the principal term
$(p-k)^2$ in the quark propagator. The simplified DSE (which incorporates WT
identity in the Landau gauge) is satisfied for large $p^2$ by $\Sigma(p)$ =
$\Sigma(0)/(1 + \beta p^2)$, except for Log factors. The limit $p^2 =0$
determines $\Sigma_0$.A third limit $p^2 = -m_0^2$ defines the $dynamical$ mass
$m_0$ via $\Sigma(im_0) = + m_0$. After two checks ($f_\pi = 93\pm 1 MeV $ and
$ <q{\bar q}>$= $(280 \pm 5 MeV)^3$), for $1.5<\beta<2$ with $\Sigma_0=300
MeV$, the T- dependent DSE is used in the real time formalism to determine the
"critical" index $\gamma= 1/3$ analytically, with the IR term partly serving
for the $H$ field. We find $T_c = 180 \pm 20 MeV$ and check the vanishing of
$f_\pi$ and $<q{\bar q}>$ at $T_c$. PACS: 24.85.+p; 12.38.Lg; 12.38.Aw.


title:
Constraints on R-parity violating supersymmetry from neutral meson
  mixing

abstract:
  Upper bounds at the weak scale are put on all $\lambda'_{ijk}\lambda'_{imn}$
type products of R-parity violating supersymmetry that may affect K-Kbar and
B-Bbar mixing. We constrain all possible products, including some not
considered before, using next-to-leading order QCD corrections to the mixing
amplitudes. Constraints are obtained for both real and imaginary parts of the
couplings. We also discuss briefly some correlated decay channels which should
be investigated in future experiments.


title:
Inverse beta decay reaction in $^{232}$Th and $^{233}$U fission
  antineutrino flux

abstract:
  Energy spectra of antineutrinos coming from $^{232}$Th and $^{233}$U
neutron-induced fission are calculated, relevant inverse beta decay
$\bar{{\nu}_e}+p \to n + e^{+}$ positron spectra and total cross sections are
found. This study is stimulated by a hypothesis that a self-sustained nuclear
chain reaction is burning at the center of the Earth ("Georeactor"). The
Georeactor, according to the author of this idea, provides energy necessary to
sustain the Earth's magnetic field. The Georeactor's nuclear fuel is $^{235}$U
and, probably, $^{232}$Th and $^{233}$U. Results of present study may appear to
be useful in future experiments aimed to test the Georector hypothesis and to
estimate its fuel components as a part of developments in geophysics and
astrophysics based on observations of low energy antineutrinos in Nature.


title: Support for the Jaffe-Wilczek Diquark Model of Pentaquarks

abstract:
  I examine the diquark model of pentaquarks that was suggested by Jaffe and
Wilczek. Based upon this model, I predict the states Theta(1530), N(1710),
Sigma(1880) and Xi(1770) to be members of the same anti-decuplet. Moreover I
predict the states N(1440), Lambda(1600), Sigma(1660) and Xi(1950) to be
members of the corresponding octet.


title:
Closing the light sbottom mass window from a compilation of e+e- ->
  hadron data

abstract:
  The e+e- -> hadron cross section data from PEP, PETRA, TRISTAN, SLC and LEP,
at centre-of-mass energies between 20 to 209 GeV, are analysed to search for
the production of a pair of light sbottoms decaying hadronically via
R-parity-violating couplings. This analysis allows the 95%C.L. exclusion of
such a particle if its mass is below 7.5 GeV/c2. The light sbottom mass window
is closed.


title:
Probing oscillations into sterile neutrinos with cosmology, astrophysics
  and experiments

abstract:
  We perform a thorough analysis of oscillation signals generated by one extra
sterile neutrino, extending previous analyses done in simple limiting cases and
including the effects of established oscillations among active neutrinos. We
consider the following probes: solar, atmospheric, reactor and beam neutrinos,
Big-Bang Nucleosynthesis (helium-4, deuterium), Cosmic Microwave Background,
Large Scale Structure, supernovae, neutrinos from other astrophysical sources.
We find no evidence for a sterile neutrino in present data, identify the still
allowed regions, and study which future experiments can best probe them:
sub-MeV solar experiments, more precise studies of CMB or BBN, future supernova
explosions, etc. We discuss how the LSND hint is strongly disfavoured by the
constraints of (standard) cosmology.


title: Photoproduction of $\Theta^+$ and other pentaquark states

abstract:
  We present constraints on the {\it relative} photoproduction cross sections
of positive parity pentaquark states, $\Sigma_5$, $\Lambda_5$, and $N_5$, based
on a minimum phenomenology gained in $\gamma N \to K \Theta^+$ and their
baryon-meson couplings as in the work of Close and Dudek. The possibility of
anomalous signals in $\gamma p \to K^0_S (\Theta^+;\Sigma_d^+)$ is discussed.
We emphasise the importance of comparing $\gamma N \to K \Theta^+$ with
"conventional" states such as $\gamma N \to K \Sigma(1660)$.


title: Confinement and Chiral Symmetry

abstract:
  We illustrate why color deconfines when chiral symmetry is restored in gauge
theories with quarks in the fundamental representation, and while these
transitions do not need to coincide when quarks are in the adjoint
representation, entanglement between them is still present.


title:
Power corrections to the $\pi^0\gamma$ transition form factor and pion
  distribution amplitudes

abstract:
  Employing the standard hard-scattering approach and the running coupling
method we calculate a class of power-suppressed corrections $\sim
1/Q^{2n},n=1,2,3,...$ to the electromagnetic $\pi^0\gamma$ transition form
factor (FF) $Q^2F_{\pi\gamma}(Q^2)$ arising from the end-point $x \to 0,1$
integration regions. In the investigations we use a hard-scattering amplitude
of the subprocess $\gamma+\gamma^{*} \to q +\bar{q}$, symmetrized under
exchange $\mu_R^2 \leftrightarrow \bar{\mu}_R^2$ important for exclusive
processes containing two external photons. In the computations the pion model
distribution amplitudes (DA's) with one and two non-asymptotic terms are
employed. The obtained predictions are compared with the CLEO data and
constraints on the DA parameters $b_2(\mu_0^2)$ and $b_4(\mu_0^2)$ at the
normalization point $\mu_0^2=1 GeV^2$ are extracted. Further restrictions on
the pion DA's are deduced from the experimental data on the electromagnetic FF
$F_{\pi}(Q^2)$.


title:
Measurement of $\sin^2{2\theta_{13}}$ by reactor experiments and its
  sensitivity

abstract:
  Reactor experiments offer a promising way to determine $\theta_{13}$ and are
free from parameter degeneracies in neutrino oscillations. It is described how
reactor measurements of $\sin^22\theta_{13}$ can be improved by a near-far
detector complex. The experimental lower bound is derived on the sensitivity to
$\sin^2{2\theta_{13}}\gtrsim 0.02$ based on the rate analysis, and an idea is
given which may enable us to circumvent this bound. It is shown that in the
Kashiwazaki-Kariwa plan (KASKA) the sensitivity to $\sin^2{2\theta_{13}}$ is
approximately 0.02.


title: On e^+e^- pair production by a focused laser pulse in vacuum

abstract:
  The probability of electron-positron pair creation by a focused laser pulse
is calculated. For description of the focused laser pulse we use a
3-dimensional model of the electromagnetic field which is based on an exact
solution of Maxwell equations. There exists two types of focused waves: e- and
h-polarized waves with only either electric, or magnetic vector being
transverse respectively. It is shown that pair production is possible only in
$e$-polarized electromagnetic wave. The dependence of the pair production
probability on the intensity of the laser pulse is obtained. It is argued that
there exists a natural physical limit for attainable focused laser pulse
intensities. This limit is posed by the pulse energy loss due to the effect of
pair creation.


title: Aspects of Neutrino Mass Matrices

abstract:
  After an Introduction briefly describing the rise and fall of the three-zero
texture of the Zee model, we discuss still-allowed two-zero textures for the
Majorana three-neutrino mass matrix. Finally, a model with two right-handed
neutrinos and two Dirac texture zeros is described (FGY model) which can relate
CP violation in leptogenesis to CP violation in long-baseline neutrino
oscillations.


title: Obtaining CKM Phase Information from B Penguin Decays

abstract:
  We discuss a method for extracting CP phases from pairs of B decays which are
related by flavor SU(3). One decay (B0 -> M1 M2) receives a significant bbar ->
dbar penguin contribution. The second (B' -> M1' M2') has a significant bbar ->
sbar penguin contribution, but is dominated by a single amplitude. CP phase
information is obtained using the fact that the B' -> M1' M2' amplitude is
related by SU(3) to a piece of the B0 -> M1 M2 amplitude. The leading-order
SU(3)-breaking effect (~25%) responsible for the main theoretical error can be
removed. For some decay pairs, it can be written in terms of known decay
constants. In other cases, it involves a ratio of form factors. However, this
form-factor ratio can either be measured experimentally, or eliminated by
considering a double ratio of amplitudes. In all cases, one is left only with a
second-order effect, ~5%. We find twelve pairs of B decays to which this method
can be applied. Depending on the decay pair, we estimate the total theoretical
error in relating the B' -> M1' M2' and B0 -> M1 M2 amplitudes to be between 5%
and 15%. The most promising decay pairs are Bd -> pi+ pi- and Bu+ -> K0 pi+,
and Bd -> D+ D- and Bd -> Ds+ D- or Bu+ -> Ds+ D0bar.