title: Possible signal for critical point in hadronization process

abstract:
  We argue that recent data on fluctuations observed in heavy ion collisions
show non-monotonic behaviour as function of number of participants (or "wounded
nucleons") N_W. When interpreted in thermodynamical approach this result can be
associated with a possible structure occuring in the corresponding equation of
state (EoS). This in turn could be further interpreted as due to the occurence
of some characteristic points (like "softest point" or "critical point") of EoS
discussed in the literature and therefore be regarded as a possible signal of
the QGP formation in such collisions. We show, however, that the actual
situation is still far from being clear and calls for more investigations of
fluctuation phenomena in multiparticle production processes to be performed.


title: Impact of recent neutrino data on R-parity violation

abstract:
  We take both the bilinear and trilinear R-parity violating couplings in
supersymmetric models as a source of neutrino masses and mixings. Using the
solar and atmospheric data and the Chooz constraint we determine the allowed
ranges of those couplings. We also estimate the effective mass for neutrinoless
double beta decay in this scenario.


title:
Origin of quark masses and Cabbibo-Kobayashi-Maskawa matrix in a gauge
  theory with nonunitary parallel transporters

abstract:
  Starting from a characteristic biinvariance property of Higgs potentials in
gauge theories with nonunitary parallel transporters, we explain how quarks of
different flavor can acquire different masses by spontaneous symmetry breaking
and what is the difference between colour and flavor. We present a gauge
theoretic model where the Cabbibo-Kobayashi-Maskawa matrix becomes computable
in principle. The model lives on a five dimensional space time with two four
dimensional boundaries R and L a small distance d apart. Right handed quarks
and leptons live on R and left handed quarks and leptons on L. Photons can
propagate in the bulk. ee- and deep inelastic eN-scattering at energies larger
than 1/d will be affected.


title: Baryon Stopping and the Valence Quark Distribution at Small x

abstract:
  We argue that the amount of baryon stopping observed in the central rapidity
region of heavy ion collisions at RHIC is proportional to the nuclear valence
quark distributions at small x. By generalizing Mueller's dipole model to
describe Reggeons we construct a non-linear evolution equation for the valence
quark distributions at small x in the leading double-logarithmic approximation.
The equation includes the effects of gluon saturation in it. The solution of
the evolution equation gives a valence quark distribution function $dn_{val}/dy
\sim e^{-(0.4\div0.5) y}$. We show that this y-dependence as well as the
predictions of Regge theory are consistent with the net-proton rapidity
distribution reported by BRAHMS.


title: From neutrino oscillations to baryogenesis

abstract:
  The evidence for neutrino oscillations leads to small neutrino masses, which
can be realized by means of the seesaw mechanism. In this framework,
baryogenesis may be achieved from leptogenesis.


title:
Forests, Groves and Higgs Bosons: Gauge Invariance Classes in
  Spontaneously Broken Gauge Theories

abstract:
  We determine the gauge invariance classes of tree level Feynman diagrams in
spontaneously broken gauge theories, providing a proof for the formalism of
gauge and flavor flips. We find new gauge invariance classes in theories with a
nonlinearly realized scalar sector. In unitarity gauge, the same gauge
invariance classes correspond to a decomposition of the scattering amplitude
into pieces that satisfy the relevant Ward Identities individually. In theories
with a linear realized scalar sector in R_\xi gauge, no additional nontrivial
gauge invariance classes exist compared to the unbroken case.


title: Nonfactorizable contributions to $B \to D^{(*)} M$ decays

abstract:
  While the factorization assumption works well for many two-body nonleptonic
$B$ meson decay modes, the recent measurement of $\bar B\to D^{(*)0}M^0$ with
$M=\pi$, $\rho$ and $\omega$ shows large deviation from this assumption. We
analyze the $B\to D^{(*)}M$ decays in the perturbative QCD approach based on
$k_T$ factorization theorem, in which both factorizable and nonfactorizable
contributions can be calculated in the same framework. Our predictions for the
Bauer-Stech-Wirbel parameters, $|a_2/a_1|= 0.43\pm 0.04$ and $Arg(a_2/a_1)\sim
-42^\circ$ and $|a_2/a_1|= 0.47\pm 0.05$ and $Arg(a_2/a_1)\sim -41^\circ$, are
consistent with the observed $B\to D\pi$ and $B\to D^*\pi$ branching ratios,
respectively. It is found that the large magnitude $|a_2|$ and the large
relative phase between $a_2$ and $a_1$ come from color-suppressed
nonfactorizable amplitudes. Our predictions for the ${\bar B}^0\to
D^{(*)0}\rho^0$, $D^{(*)0}\omega$ branching ratios can be confronted with
future experimental data.


title:
Extended set of Majorana spinors, a new dispersion relation, and a
  preferred frame

abstract:
  We aspire to fufill Majorana's original goal of bringing full symmetry
between the charged and fundamentally neutral particles. We present a
description of fundamentally neutral particles without any reliance on Dirac
spinors. We show that the extended set Majorana spinors (a) describe a Wigner
class of fermions in which the charge conjugation and the parity operators
commute, rather than anticommute, and (b) support two type of dispersion
relations, the usual E= pm sqrt{p^2+m^2}, and a new E=- 2m \pm sqrt{p^2+m^2}.
The latter may be preferred over the former on minimization of energy
requirement and offers a natural source for observed matter-antimatter
asymmetry in the universe. The ensuing physical interpretation requires
existence of a preferred frame which may be identified with the cosmic neutrino
background.


title: Three-Neutrino Mixing after the First Results from K2K and KamLAND

abstract:
  We analyze the impact of the data on long baseline \nu_\mu disappearance from
the K2K experiment and reactor \bar\nu_e disappearance from the KamLAND
experiment on the determination of the leptonic three-generation mixing
parameters. Performing an up-to-date global analysis of solar, atmospheric,
reactor and long baseline neutrino data in the context of three-neutrino
oscillations, we determine the presently allowed ranges of masses and mixing
and we consistently derive the allowed magnitude of the elements of the
leptonic mixing matrix. We also quantify the maximum allowed contribution of
\Delta m^2_{21} oscillations to CP-odd and CP-even observables at future long
baseline experiments.


title: Correlated Hierarchy, Dirac Masses and Large Mixing Angles

abstract:
  We introduce a new parametrization of the MNS lepton mixing matrix which
separates the hierarchical Grand Unified relations among quarks and leptons. We
argue that one large angle stems from the charged leptons, the other from the
seesaw structure of the neutral lepton mass matrix. We show how two large
mixing angles can arise naturally provided there are special requirements on
the Dirac ($\Delta I_{\rm w}=1/2$) and Majorana ($\Delta I_{\rm w}=0$) masses.
One possibility is a correlated hierarchy between them, the other is that the
$\Delta I_{\rm w}=0$ Majorana mass has a specific texture; it is Dirac-like for
two of the three families.


title: Gauged Baryon Parity and Nucleon Stability

abstract:
  We show that the Standard Model Lagrangian, including small neutrino masses,
has an anomaly-free discrete Z_6 symmetry. This symmetry can emerge naturally
from I^{3}_{R}+L_i+L_j-2L_k gauge symmetry (L_i is the i-th lepton number) and
ensure the stability of the nucleon even when the threshold of new physics
\Lambda is low. All \Delta B=1 and \Delta B=2 (B is the baryon number)
effective operators are forbidden by the Z_6 symmetry. \Delta B=3 operators are
allowed, but they arise only at dimension 15. We estimate the lifetime for
"triple nucleon decay" resulting from these operators and find that \Lambda can
be as low as 10^2 GeV. We suggest a simple mechanism for realizing reasonable
neutrino masses and mixings even with such a low scale for \Lambda.


title: CP Violation and Nonleptonic B-meson Decays

abstract:
  We discuss the perturbative QCD approach for exclusive non-leptonic two body
B-meson decays. We briefly review its ingredients and some important
theoretical issues related to the factorization approach. PQCD results are
compatible with present experimental data for the charmless B-meson decays. We
predict the possibility of large direct CP violation effects in $B^0 \to
\pi^{+}\pi^{-}$ $(23\pm7 %)$ and $B^0\to K^{+}\pi^{-}$ $(-17\pm5%)$. For
charmed decay $B \to D^{(*)}\pi$, we get large non-factorizable contributions
for Color-suppressed decays and obtain $|a_2/a_1|\sim 0.4-0.5$ and
$Arg(a_2/a_1)\sim -42^{o}$. In the last section we investigate the method to
extract the weak phases $\phi_2$ from $B \to \pi\pi$ decay and $\phi_3$ from
$K\pi$ modes. From BaBar measurement of CP asymmetry for the $\pi^{+}\pi^{-}$
decay, the prefered CKM weak phases are: $\phi_1=(24\pm2)^{o}$, $\phi_2=(78\pm
22)^{o}$ and $\phi_3=(78\pm 22)^{o}$.


title:
Non-renormalization Theorem Originating in a New Fixed Point of the
  Vector Manifestation

abstract:
  We study the pion velocity at the critical temperature of chiral symmetry
restoration in QCD. Starting from the premise that the bare effective field
theory is to be defined from the underlying QCD, we incorporate the effects of
Lorentz non-invariance into the bare theory by matching an effective field
theory to QCD at a suitable matching scale, and investigate how the Lorentz
non-invariance existing in the bare theory influences physical quantities.
Using the hidden local symmetry model as the effective field theory, where the
chiral symmetry restoration is realized as the vector manifestation (VM), we
find that the pion velocity at the critical temperature receives neither
quantum nor (thermal) hadronic corrections at the critical temperature even
when we start from the bare theory with Lorentz symmetry breaking. This is
likely the manifestation of a new fixed point in the Lorentz non-invariant
formulation of the VM.


title: Exploring QCD: from LEAR to GSI

abstract:
  In this invited contribution I briefly review some of the principal topics in
hadron spectroscopy that were studied at the CERN low-energy antiproton
facility LEAR, from its beginnings in the early 1980s to the present. These
topics include the nature of multiquark systems, the short-ranged nuclear
force, and gluonic hadrons, including glueballs and hybrids. Lessons we have
learned from the LEAR program that are relevant to the future GSI project are
given particular emphasis.


title:
How to reconcile the Rosenbluth and the polarization transfer method in
  the measurement of the proton form factors

abstract:
  The apparent discrepancy between the Rosenbluth and the polarization transfer
method for the ratio of the electric to magnetic proton form factors can be
explained by a two-photon exchange correction which does not destroy the
linearity of the Rosenbluth plot. Though intrinsically small, of the order of a
few percent of the cross section, this correction is kinematically enhanced in
the Rosenbluth method while it is small for the polarization transfer method,
at least in the range of (Q^2) where it has been used until now.


title: TeV black hole fragmentation and detectability in extensive air showers

abstract:
  In models with large extra dimensions, particle collisions with
center-of-mass energy larger than the fundamental gravitational scale can
generate nonperturbative gravitational objects. Since cosmic rays have been
observed with energies above $10^{8}$ TeV, gravitational effects in the TeV
energy range can, in principle, be observed by ultrahigh energy cosmic ray
detectors. We consider the interaction of ultrahigh energy neutrinos in the
atmosphere and compare extensive air showers from TeV black hole formation and
fragmentation with standard model processes. Departures from the standard model
predictions arise in the interaction cross sections and in the multiplicity of
secondary particles. Large theoretical uncertainties in the black hole cross
section weaken attempts to constrain TeV gravity based solely on differences
between predicted and observed event rates. The large multiplicity of
secondaries in black hole fragmentation enhances the detectability of TeV
gravity effects. We simulate TeV black hole air showers using PYTHIA and AIRES,
and find that black hole-induced air showers are quite distinct from standard
model air showers. However, the limited amount of information registered by
realistic detectors together with large air shower fluctuations limit in
practice the ability to distinguish TeV gravity events from standard model
events in a shower by shower case. We discuss possible strategies to optimize
the detectability of black hole events and propose a few unique signatures that
may allow future high statistics detectors to separate black hole from standard
model events.


title: A two-component model for $\gamma^*$-p scattering at small Bjorken x

abstract:
  We extend the Golec-Biernat-W\"usthoff model for virtual photon - proton
scattering to include the resolved photon component explicitly. The parameters
of the resolved photon component are taken from the literature, while the
parameters of the dipole-nucleon interaction are fitted to the HERA data in a
selected limited range of $x$ and $Q^2$. A good agreement with experimental
data is obtained far beyond the region of the fit.


title: Dark Energy Problem in a Four-Fermion Interaction Model

abstract:
  Cosmology enters precision testing period with the observational experiments
advancement. We have not arrived to decipher the origin of the dominant dark
energy component of our universe, although we have located some of its
characters. In such a situation the possibilities of a simple four-fermion
interaction model are investigated to describe dark energy characters. We
explicitly calculate the vacuum expectation value of the energy-momentum tensor
and discuss the results with comparison to the equation of state for dark
energy requirement. It is found that the negative pressure is realized at low
temperature. It is an appropriate property as a dark energy candidate. We also
investigate some cosmological tests for the dark energy via its equation of
state.


title: On contributions of fundamental particles to the vacuum energy

abstract:
  Recently different regularization schemes for calculations of the vacuum
energy stored in the zero-point motion of fundamental fields were discussed. We
show that the contribution of the fermionic and bosonic fields to the energy of
the vacuum depends on the physical realization of the vacuum state. The energy
density of the homogeneous vacuum is zero irrespective of the fermionic and
bosonic content of the effective theories in the infra-red corner. The
contribution of the low-energy fermions and bosons becomes important when the
coexistence of different vacua is considered, such as the bubble of the true
vacuum inside the false one. We consider the case when these vacua differ only
by the masses of the low-energy fermionic fields, M(true)>M(false), while their
ultraviolet structure is identical. In this geometry the energy density of the
false vacuum outside the bubble is zero, rho(false)=-P(false)=0, which
corresponds to zero cosmological constant. The energy density of the true
vacuum inside the bubble rho(true)=-P(true) is proportional to -
Lambda^2(M^2(true)- M^2(false)), where Lambda is the ultraviolet cut-off.


title: A detailed QCD analysis of twist-3 effects in DVCS observables

abstract:
  In this paper I present a detailed QCD analysis of twist-3 effects in the
Wandzura-Wilczek (WW) approximation in deeply virtual Compton scattering (DVCS)
observables for various kinematical settings, representing the HERA, HERMES,
CLAS and the planned EIC (electron-ion-collider) experiments. I find that the
twist-3 effects in the WW approximation are almost always negligible at
collider energies but can be large for low Q^2 and smaller x_bj in observables
for the lower energy, fixed target experiments directly sensitive to the real
part of DVCS amplitudes like the charge asymmetry (CA). Conclusions are then
drawn about the reliability of extracting twist-2 generalized parton
distributions (GPDs) from experimental data and a first, phenomenological,
parameterization of the LO and NLO twist-2 GPD $H$, describing all the
currently available DVCS data within the experimental errors is given.


title: Flavor Democracy: On which basis?

abstract:
  I argue that flavor democracy should not be considered as a "mere"
assumption, but rather a fact that is inherent where there is hierarchy of
quark masses. Briefly the crux of the argument is the ambiguity of defining a
basis when one introduces a mass matrix. That is there is a degree of freedom
of also defining a basis other than the weak eigenbasis with respect to which
one can write down mass matrices. Since the ultimate aim is to diagonalize to
the mass eigenbasis this is physically equivalent. But not necessarily so for
the human eye.


title:
Remarks on heavy-quark production in photon-nucleon and photon-photon
  collisions

abstract:
  I discuss mechanisms of heavy quark production in (real) photon-nucleon and
(real) photon - (real) photon collisions. In particular, I focuse on
application of the Saturation Model. In addition to the main dipole-nucleon or
dipole-dipole contribution included in recent analyses, I propose how to
calculate within the same formalism the hadronic single-resolved contribution
to heavy quark production. At high photon-photon energies this yields a
sizeable correction of about 30-40 % for inclusive charm production and 15-20 %
for bottom production. Adding all possible contributions to $e^+ e^- \to b \bar
b X$ together removes a huge deficit observed in earlier works but does not
solve the problem totally.


title: The g factor of proton

abstract:
  We consider higher order corrections to the g factor of a bound proton in
hydrogen atom and their consequences for a magnetic moment of free and bound
proton and deuteron as well as some other objects.


title: Understanding neutrino masses and mixings within the seesaw framework

abstract:
  Understanding the disparate mixing patterns between quarks and leptons is one
of the major challenges in particle theory today. I discuss some of the ways to
understand this difference within the seesaw framework using new symmetries of
quarks and leptons. After a brief introduction to the various types of seesaw
formulae, proposals for understanding large solar and atmospheric mixings for
the three mass hierarchies i.e. normal, inverted and degenerate, are presented
and their implications discussed.


title:
Precision Neutrino Oscillation Physics with an Intermediate Baseline
  Reactor Neutrino Experiment

abstract:
  We discuss the physics potential of intermediate $L \sim 20 \div 30$ km
baseline experiments at reactor facilities, assuming that the solar neutrino
oscillation parameters $\Delta m^2_{\odot}$ and $\theta_{\odot}$ lie in the
high-LMA solution region. We show that such an intermediate baseline reactor
experiment can determine both $\Delta m^2_{\odot}$ and $\theta_{\odot}$ with a
remarkably high precision. We perform also a detailed study of the sensitivity
of the indicated experiment to $\Delta m^2_{\rm atm}$, which drives the
dominant atmospheric $\nu_{\mu}$ ($\bar{\nu}_{\mu}$) oscillations, and to
$\theta$ - the neutrino mixing angle limited by the data from the CHOOZ and
Palo Verde experiments. We find that this experiment can improve the bounds on
$\sin^2\theta$. If the value of $\sin^2\theta$ is large enough, $\sin^2\theta
\gtap 0.02$, the energy resolution of the detector is sufficiently good and if
the statistics is relatively high, it can determine with extremely high
precision the value of $\Delta m^2_{\rm atm}$. We also explore the potential of
the intermediate baseline reactor neutrino experiment for determining the type
of the neutrino mass spectrum, which can be with normal or inverted hierarchy.
We show that the conditions under which the type of neutrino mass hierarchy can
be determined are quite challenging, but are within the reach of the experiment
under discussion.


title: Vector mesons in $q\bar q\bar q$ systems

abstract:
  A new selection rule is described for the vector mesons in the decuplet
representations of flavor SU(3)


title: Anarchy in the neutrino sector?

abstract:
  If the connection between the fundamental theory and neutrino mass matrices
M_\nu is sufficiently complicated all traces of underlying symmetries might be
erased and an 'anarchical' M_\nu, with random entries, can arise. It has been
claimed that such random matrices generically prefer large mixing making
unnecessary to invoke flavour symmetries to explain the observed pattern of
neutrino mixing angles. A critical analysis of this idea (paying particular
attention to the role of unphysical phases and coordinate dependence) shows
that basis-independent, random M_nu's are not biased towards large values of
the neutrino mixing angles, contrary to previous claims. As a result, the case
for anarchy in the neutrino sector is considerably weakened.


title:
Chargino contributions to $\epsilon^{\prime}/ \epsilon$ in the
  left-right supersymmetric model

abstract:
  We analyze the chargino contributions to the CP violating ratio
$\epsilon^{\prime}/\epsilon$ in the left-right supersymmetric model. We study
the possibility that these contributions alone can saturate the experimental
value of $\epsilon^{\prime}/\epsilon$. We derive conservative bounds on
supersymmetric flavor violation parameters in the up squark LL, RR, LR and RL
sectors, using the mass insertion approximation. While the LL bounds are found
to be consistent with the MSSM values, the LR constraints are new and much
stronger.


title: Two-Body Charmless B Decays Involving eta and eta'

abstract:
  We discuss implications of recent experimental data for B decays into two
pseudoscalar mesons, with emphasis on those with $\eta$ and $\eta'$ in the
final states. Applying a U-spin argument, we show that tree and penguin
amplitudes, both in $B^+ \to \pi^+ \eta$ and in $B^+ \to \pi^+ \eta'$, are of
comparable magnitudes. Nontrivial relative weak and strong phases between the
tree-level amplitudes and penguin-loop amplitudes in the $B^{\pm} \to \pi^{\pm}
\eta$ modes are extracted. We predict possible values for the averaged
branching ratio and CP asymmetry of the $B^{\pm} \to \pi^{\pm} \eta'$ modes. We
test the assumption of a singlet-penguin amplitude with the same weak and
strong phases as the QCD penguin in explaining the large branching ratios of
$\eta' K$ modes, and show that it is consistent with current branching ratio
and CP asymmetry data of the $B^+ \to (\pi^0, \eta, \eta') K^+$ modes. We also
show that the strong phases of the singlet-penguin and tree-level amplitudes
can be extracted with further input of electroweak penguin contributions and a
sufficiently well-known branching ratio of the $\eta K^+$ mode. Using SU(3)
flavor symmetry, we also estimate required data samples to detect modes that
have not yet been seen.


title:
Heavy bottom squark mass in the light gluino and light bottom squark
  scenario

abstract:
  Restrictive upper bounds on the heavy bottom squark mass when the gluino and
one bottom squark are both light are based on the predicted reduction of $R_b$
(the fraction of $Z$ hadronic decays to $b \bar b$ pairs) in such a scenario.
These bounds are found to be relaxed by the process $Z \to b\bar{\tilde
b}{\tilde g}/{\bar b}{\tilde b}{\tilde g}$, which may partially compensate for
the reduction of $R_b$. The relaxation of bounds on the top squark and the
scale-dependence of the strong coupling constant are also discussed.


title: Finslerian Isospin--Nonlinear Equations for Pion and Spinor Interactions

abstract:
  The Finslerian curvature is introduced in the three-dimensional isospin
space, suggesting that the isospin-pion field transforms according to
non-linear Finslerian invariance transformations. The fundamental non-linear
realization is associated with the pion field triplet. The Finslerian
Lagrangian, as well as the implied pion-field selfinteraction, involves the
first but no higher derivatives of the pion field. While the invariance
transformations are now nonlinear, the conservation laws are still meaningful
and sufficient to get the conservations for the energy-momentum and charges.
The Finsler-invariant pion-nucleon Lagrangian function is also proposed. The
Finslerian isospin-space symmetry is a pure interaction symmetry not shared by
the asymptotic fields. The full Klein-Gordon-Dirac equation is accordingly
extended. Various details of the implied Finsleroid-structure are formulated in
an explicit way.


title: SuperWIMP Dark Matter Signals from the Early Universe

abstract:
  Cold dark matter may be made of superweakly-interacting massive particles,
superWIMPs, that naturally inherit the desired relic density from late decays
of metastable WIMPs. Well-motivated examples are weak-scale gravitinos in
supergravity and Kaluza-Klein gravitons from extra dimensions. These particles
are impossible to detect in all dark matter experiments. We find, however, that
superWIMP dark matter may be discovered through cosmological signatures from
the early universe. In particular, superWIMP dark matter has observable
consequences for Big Bang nucleosynthesis and the cosmic microwave background
(CMB), and may explain the observed underabundance of 7Li without upsetting the
concordance between deuterium and CMB baryometers. We discuss implications for
future probes of CMB black body distortions and collider searches for new
particles. In the course of this study, we also present a model-independent
analysis of entropy production from late-decaying particles in light of WMAP
data.


title: Neutrino Magnetic Moments and Minimal Supersymmetric SO(10) Model

abstract:
  We examine supersymmetric contributions to transition magnetic moments of
Majorana neutrinos. We first give the general formula for it. In concrete
evaluations, informations of neutrino mass matrix elements including CP phases
are necessary. Using unambiguously determined neutrino mass matrices in
recently proposed minimal supersymmetric SO(10) model, the transition magnetic
moments are calculated. The resultant neutrino magnetic moments are found to be
roughly an order of magnitude larger than those calculated in the standard
model extended to incorporate the see-saw mechanism.


title:
A model for fluctuating inflaton coupling: (s)neutrino induced adiabatic
  perturbations and non-thermal leptogenesis

abstract:
  We discuss an unique possibility of generating adiabatic density
perturbations and leptogenesis from the spatial fluctuations of the inflaton
decay rate. The key assumption is that the initial isocurvature perturbations
are created in the right handed sneutrino sector during inflation which is then
converted into adiabatic perturbations when the inflaton decays. We discuss
distinct imprints on the cosmic micro wave background radiation, which can
distinguish non-thermal versus thermal leptogenesis.


title: Higgs Mechanism via Bose Einstein Condensation

abstract:
  Recently the Bose-Einstein phenomenon has been proposed as possible physical
mechanism underlying the spontaneous symmetry breaking in cold gauge theories.
The mechanism is natural and we use it to drive the electroweak symmetry
breaking. The mechanism can be implemented in different ways while here we
review two simple models in which the Bose-Einstein sector is felt directly or
indirectly by all of the standard model fields. The structure of the
corrections due to the new mechanism is general and independent on the model
used leading to experimental signatures which can be disentangled from other
known extensions of the standard model.


title:
A minimal three-flavor model for neutrino oscillation based on
  superluminal property

abstract:
  Recent experimental research progress of solar neutrino and neutrino
oscillation reveals that neutrinos do have nonzero mass, which poses a serious
challenge to theoretical physics. Two symmetries, the common invariance under
the space-time inversion and the invariance or violation to maximum under the
space inversion are analyzed for Dirac equation or the equation for
superluminal neutrino respectively. Then a simple three-flavor model containing
only one parameter is proposed and the relations among neutrino oscillation,
parity violation and superluminal property are emphasized.


title: $b\to s \gamma$ in Littlest Higgs Model

abstract:
  The inclusive process $b \to s \gamma$ is studied in the littlest Higgs
model. The contributions arising from new particles are normally suppressed by
a factor of $O(v^2/f^2)$. Due to the large uncertainties of experimental
measurements and theoretical predictions, the model parameters can escape from
the constraints of present experiments provided $f \ge 1$ TeV.


title: Confinement and gluon propagator in Coulomb gauge QCD

abstract:
  We consider the effects of the Faddeev-Popov determinant in the Coulomb gauge
on the confinement properties of the QCD vacuum. We show that the the
determinant is needed to regularize the otherwise divergent functional
integrals near the Gribov horizon but still enables large field configurations
to generate IR enhanced running coupling. The physical gluon propagator is
found to be strongly suppressed in the
  IR consistent with expectations from lattice gauge calculations.


title: The Mixing Angle of the Lightest Scalar Nonet

abstract:
  We show that the \kappa, a_0(980), \sigma and the f_0(980) resonances
constitute the lightest scalar nonet in three different and complementary ways.
First, by establishing the continuous movement of the poles from the physical
to a SU(3) limit. Second, by performing an analysis of the couplings of the
scalar mesons to pairs of pseudoscalars and third, by analysing the couplings
of the scalars with meson-meson SU(3) scattering eigenstates. Every of the last
two methods agree that the mixing angle between the singlet and the octet I=0
states is \theta= 19^o\pm 5 degrees, so that the \sigma is mainly the singlet
and the f_0(980) the isosinglet octet state.


title: B0 - anti-B0 mixing beyond factorization

abstract:
  We present a calculation of the B0 - anti-B0 mixing matrix element in the
framework of QCD sum rules for three-point functions. We compute alpha_s
corrections to a three-point function at the three-loop level in QCD
perturbation theory, which allows one to extract the matrix element with
next-to-leading order (NLO) accuracy. This calculation is imperative for a
consistent evaluation of experimentally-measured mixing parameters since the
coefficient functions of the effective Hamiltonian for B0 - anti-B0 mixing are
known at NLO. We find that radiative corrections violate factorization at NLO;
this violation is under full control and amounts to 10%.


title: Non-perturbative structure of the polarized nucleon sea

abstract:
  We investigate the flavour and quark-antiquark structure of the polarized
nucleon by calculating the parton distribution functions of the nucleon sea
using the meson cloud model. We find that the SU(2) flavor symmetry in the
light antiquark sea and quark-antiquark symmetry in the strange quark sea are
broken, {\it i.e.} $\Delta\ubar < \Delta \dbar$ and $\Delta s < \Delta \sbar$.
The polarization of the strange sea is found to be positive, which is in
contradiction to previous analyses. We predict a much larger quark-antiquark
asymmetry in the polarized strange quark sea than that in the unpolarized
strange quark sea. Our results for both polarized light quark sea and polarized
strange quark sea are consistent with the recent HERMES data.


title: A "Littlest Higgs" Model with Custodial SU(2) Symmetry

abstract:
  In this note, a ``littlest higgs'' model is presented which has an
approximate custodial SU(2) symmetry. The model is based on the coset space
$SO(9)/(SO(5)\times SO(4))$. The light pseudo-goldstone bosons of the theory
include a {\it single} higgs doublet below a TeV and a set of three $SU(2)_W$
triplets and an electroweak singlet in the TeV range. All of these scalars
obtain approximately custodial SU(2) preserving vacuum expectation values. This
model addresses a defect in the earlier $SO(5)\times SU(2)\times U(1)$ moose
model, with the only extra complication being an extended top sector. Some of
the precision electroweak observables are computed and do not deviate
appreciably from Standard Model predictions. In an S-T oblique analysis, the
dominant non-Standard Model contributions are the extended top sector and higgs
doublet contributions. In conclusion, a wide range of higgs masses is allowed
in a large region of parameter space consistent with naturalness, where large
higgs masses requires some mild custodial SU(2) violation from the extended top
sector.


title: Impact and Implication of Bi-Large Neutrino Mixings on GUTs

abstract:
  Under the assumptions that 1) the quark/lepton mass matrices take
Froggatt-Nielsen's factorized power form \lambda^{\psi_i+\psi_j} with anomalous
U(1) charges \psi_i, and 2) the U(1) charges \psi_i respect the SU(5) GUT
structure, we show that the quark mass data necessarily implies the large 2-3
mixing in the MNS mixing matrix U_{MNS}. If we further add the data of the mass
squared difference ratio of solar and atmospheric neutrinos, then, it implies
that the 1-2 mixing in U_{MNS} is also large, so explaining the bi-large
mixing. This analysis also gives a prediction that U_{e3}\equiv(U_{\rm
MNS})_{13} should be of order \lambda \sim (0.1 - 0.5).


title:
Electroweak radiative corrections to $e^+e^- \to t \bar{t} h$ at linear
  colliders

abstract:
  We calculate the ${\cal O}(\alpha_{{\rm ew}})$ electroweak radiative
corrections to $e^+ e^- \to t \bar{t} h$ at a electron-positron linear collider
(LC) in the standard model. We analyze the dependence of the ${\cal
O}(\alpha_{{\rm ew}})$ corrections on the Higgs boson mass $m_{h}$ and
colliding energy $\sqrt{s}$, and find that the corrections significantly
decrease or increase the Born cross section depending on the colliding energy.
The numerical results show that the ${\cal O}(\alpha_{{\rm ew}})$ relative
correction is strongly related to the Higgs boson mass when $\sqrt{s}=500 GeV$,
and for $m_h = 150 GeV$ the relative correction ranges from -31.3% to 2.3% as
the increment of the colliding energy from 500 GeV to 2 TeV.


title: The effect of H^\pm on B^\pm -> \tau^\pm \nu and B^\pm -> \mu^\pm \nu

abstract:
  The hitherto unobserved purely leptonic decays B^\pm -> \tau^\pm \nu and
B^\pm -> \mu^\pm \nu are of much interest at current and future runs of the
e+e- B factories. Such decays are sensitive to charged Higgs bosons (H^\pm) at
the tree-level and provide essentially model independent constraints on
\tan\beta/m_{H^\pm}. We include the large corrections to the H^\pm-ub coupling
induced by virtual SUSY effects and show that the bounds on \tan\beta/m_{H^\pm}
can be significantly weakened or strengthened.


title: Decorrelation of forward dijets in DIS off nuclei

abstract:
  Based on the color dipole QCD approach we discuss the multiple scattering
mechanism (MSM) of suppression of back-to-back azimuthal correlations of high
$p_{T}$ forward dijets in DIS off nuclei. We quantify the effect in terms of
acoplanarity/decorrelation momentum of jets. For hard dijets the decorrelation
momentum is found to be of the order of the nuclear saturation momentum $Q_A$.
Minijets with the transverse momentum below the saturation scale are proved to
be completely decorrelated. The analysis of DIS indicates that in heavy ion
collisions the contribution of MSM to the reactions dynamics can be of the
order of magnitude of the decorrelation effect observed at RHIC.


title: Neutron - Antineutron Oscillations in a Trap Revisited

abstract:
  We have reexamined the problem of $n-\bar n$ oscillations for ultra-cold
neutrons (UCN) confined within a trap. It is shown that for up to $10^3$
collisions with the walls the process can be described in terms of wave
packets. The exact equation is derived describing the time-evolution of the
$\bar n$-component for an arbitrary number of collisions with the trap walls.
The $\bar n$-component grows linearly with time with enhancement factor
depending on the reflection properties of the walls.


title:
Light Scalar Mesons in the Improved Ladder Approximation of QCD with
  Strong $U_A(1)$ Breaking

abstract:
  The spectrum and the mixing angle of the light scalar nonet mesons are
studied using the extended Nambu-Jona-Lasinio (NJL) model as well as the
improved ladder approximation (ILA) of QCD with U_A(1) symmetry breaking
interaction. The U_A(1) breaking is represented by the Kobayashi-Maskawa-'t
Hooft (KMT) interaction. The strength of the KMT interaction in the NJL model
is determined so as to reproduce the electromagnetic decays of the \eta meson.
That in the ILA approach is determined so as to reproduce the pseudoscalar
meson spectrum.
  In the extended NJL model, we study the qualitative features of the scalar
meson spectrum. In the scalar nonet spectrum, the KMT interaction is found to
give the right ordering of \sigma - a_0 masses and a few hundred MeV mass
difference between the \sigma and a_0 mesons. We also find that the strangeness
content in the \sigma meson is about 15%.
  In the ILA approach, we confirm the qualitative features of the results from
the extended NJL. We obtain the mass spectra of the light pseudoscalar nonet
mesons and the \sigma, a_0 mesons which are consistent with current
experimental data. On the other hand, we show that the obtained f_0 and K_0^*
state can not be identified directly with the experimental data. It may suggest
that the f_0(980) and \kappa(700-900) states may not be explained only by the
quark-anti quark state.
  We also find that the strangeness content in the \sigma meson is about 5%. We
obtain the result that the U_A(1) breaking interaction reproducing the mass
spectrum of the pseudoscalar meson gives large effects on the scalar meson mass
spectrum.


title:
New physics effects on the CP asymmetries in B -> phi K_S and B -> eta'
  K_S decays

abstract:
  Within the standard model (SM), the time dependent CP asymmetries in B -> psi
K_S, B -> eta' K_S and B -> phi K_S are expected to give the same result i.e.
sin (2 beta). However recent measurements of the mixing induced CP asymmetries
in B -> phi K_S and B -> eta' K_S modes give results whose central values
differ from SM expectations. We explore the effects of new physics in the two
Higgs doublet model (THDM), which allows tree level flavor changing neutral
currents (so called Model III), and the model with extra vector like down quark
(VLDQ). We find that the observed mixing induced CP asymmetry for B -> phi K_S
can not be accommodated by the THDM, but can be explained in the VLDQ model and
both models can explain the observed asymmetry for B -> eta' K_S mode.


title:
Calculations of the Imaginary Part of Gauge Boson's Wave-function
  Renormalization Constants and the Modification of hep-ph/0301090

abstract:
  We have calculated the imaginary part of W and Z gauge boson's wave-function
renormalization constants (wrc.) in the complex-pole mass renormalization
scheme and made atonement for the paper hep-ph/0301090 where the imaginary part
of gauge boson's wrc. has been ignored in the second renormalization scheme in
section 4. But the conclusion of this section in hep-ph/0301090 doesn't change.


title:
Towards a Generic Parametrisation of "New Physics" in Quark-Flavour
  Mixing

abstract:
  We consider a special class of dimension-six operators which are assumed to
be induced by some new physics with typical scales of order \Lambda. This
special class are the operators with two quarks which can mediate transitions
between quark flavours. We show that under quite general assumptions the effect
of these operators can be parametrised in terms of six parameters, leading to a
modification of the (at tree level flavour diagonal) neutral currents and to an
``effective CKM matrix'' for the charged currents, which is not necessarily
unitary any more. The effects of these operators on charged and neutral
currents are studied.


title:
Sigma-meson and omega-rho mixing effects in omega --> pi^+ pi^- gamma
  decay

abstract:
  We calculate the branching ratio of omega --> pi^+ pi^- gamma decay in a
phenomenological framework in which the contributions of VMD, chiral loops,
sigma-meson intermediate state amplitudes and the effects of omega-rho mixing
are considered. We conclude that the sigma-meson intermediate state amplitude
and omega-rho mixing make substantial contribution to the branching ratio.


title: Searching for a very light Higgs boson at the Tevatron

abstract:
  Light Higgs bosons (h^0) with a mass below 60 GeV may have escaped detection
at LEP due to a suppressed cross-section for e^+e^-\to Zh^0. Their discovery is
also problematic in standard search channels at the Tevatron Run II and LHC.
Such a h^0 can arise in the two Higgs doublet model (2HDM) and in the Minimal
Supersymmetric Standard Model (MSSM) with explicit CP violating phases. We
propose the mechanism p\bar p \to H^\pm h^0 which offers cross-sections of up
to 500 fb in the 2HDM, or up to 100 fb in the MSSM. The possibility of a large
branching ratio for H^\pm\to h^0W^\pm would give rise to the non-standard
signature h^0h^0W^\pm which might facilitate detection.


title:
Against the possibility of the observation of the free quarks in the
  melting of nucleons

abstract:
  In the paper the thermal energy transfer for elementary particles is
described. The quantum heat transport equation is obtained. It is shown that
for thermal excitation of the order of the relaxation time the excited matter
response is quantized on the different levels (atomic, nuclear, quark) with
quantum thermal energy equal E^{atomic}=9 eV, E^(nuclear)=7 MeV and
E^{quark}=139 MeV. As the result the quantum for the heating process of
nucleons is the pi-meson (consisting of the two quarks).
  Keywords: Heat quanta; Quantum heat transport; Quantum diffusion coefficient.


title: Neutrinos and matter-antimatter asymmetry of the universe

abstract:
  Interactions of heavy Majorana neutrinos in the thermal phase of the early
universe may be the origin of the cosmological matter-antimatter asymmetry.
Successful baryogenesis, independent of initial conditions, is possible for
neutrino masses in the range $10^{-3} {eV} \leq m_i \lesssim 0.1$ eV.
Remarkably, this mass window is consistent with the evidence for neutrino
masses from oscillations.


title: Exact constraints on the QCD Phase Diagram

abstract:
  We derive exact constraints relating QCD at nonzero baryon chemical potential
and temperature to QCD at nonzero isospin chemical potential and temperature, a
theory which can be simulated by conventional methods. These results challenge
the consistency of dynamical models of superconductivity and superfluidity in
QCD.


title: Group-Theoretical Aspects of Orbifold and Conifold GUTs

abstract:
  Motivated by the simplicity and direct phenomenological applicability of
field-theoretic orbifold constructions in the context of grand unification, we
set out to survey the immensely rich group-theoretical possibilities open to
this type of model building. In particular, we show how every maximal-rank,
regular subgroup of a simple Lie group can be obtained by orbifolding and
determine under which conditions rank reduction is possible. We investigate how
standard model matter can arise from the higher-dimensional SUSY gauge
multiplet. New model building options arise if, giving up the global orbifold
construction, generic conical singularities and generic gauge twists associated
with these singularities are considered. Viewed from the purely field-theoretic
perspective, such models, which one might call conifold GUTs, require only a
very mild relaxation of the constraints of orbifold model building. Our most
interesting concrete examples include the breaking of E_7 to SU(5) and of E_8
to SU(4)xSU(2)xSU(2) (with extra factor groups), where three generations of
standard model matter come from the gauge sector and the families are
interrelated either by SU(3) R-symmetry or by an SU(3) flavour subgroup of the
original gauge group.


title:
Effect of supersymmetric phases on lepton dipole moments and rare lepton
  decays

abstract:
  We study the effect of SUSY phases on rare decays of leptons and on their
magnetic and electric dipole moments. We consider the most general mass
matrices for sleptons within the MSSM including left--right mixing, flavour
mixing and complex phases. We show that the phases also affect CP even
observables. Moreover, we demonstrate that contrary to common belief the phase
of mu can be large even for slepton masses as small as 200 GeV provided the
lepton flavour violating parameters are complex.


title:
Continuum bound states K-long, D_{1}(2420), D_{s1}(2536) and their
  partners K-short, D_{1}(2400), D*_{sJ}(2463)

abstract:
  The very recently observed $D^{\ast}_{sJ}(2463)$ meson is described as a
$J^{P}=1^{+}$ $c\bar{s}$ bound state in a unitarised meson model, owing its
existence to the strong OZI-allowed $^{3}P_{0}$ coupling to the nearby $S$-wave
$D^{\ast}K$ threshold. By the same non-perturbative mechanism, the narrow
axial-vector $D_{s1}(2536)$ resonance shows up as a quasi-bound-state partner
embedded in the $D^{\ast}K$ continuum. With the same model and parameters, it
is also shown that the preliminary broad $1^{+}$ $D_{1}(2400)$ resonance and
the established narrow $1^{+}$ $D_{1}(2420)$ may be similar $c\bar{n}$
partners, as a result of the strong OZI-allowed $^{3}P_{0}$ coupling to the
nearby $S$-wave $D^{\ast}\pi$ threshold. The continuum bound states
$D_{1}$(2420) and $D_{s1}(2536)$ are found to be mixtures of 33% $^{3}P_{1}$
and 67% $^{1}P_{1}$, whereas their partners $D_{1}(2400)$ and
$D^{\ast}_{sJ}(2463)$ have more or less the opposite $^{2S+1}P_1$-state
content, but additionally with some $D^{\ast}\pi$ or $D^{\ast}K$ admixture,
respectively.
  The employed mechanism also reproduces the ratio of the $K_{L}$-$K_{S}$ mass
difference and the $K_{S}$ width, by describing $K_{L}$ as a bound state
embedded in the $\pi\pi$ continuum. The model's results for $J^{P}=1^{+}$
states containing one $b$ quark are also discussed.


title: Conventional Physics Explanations for the NuTeV sin2ThetaW

abstract:
  The NuTeV experiment has measured sin^2Theta_W = 0.2277 +/- 0.0013(stat) +/-
0.0009(syst), approximately 3 standard deviations above the standard model
prediction. This discrepancy has motivated speculation that the NuTeV result
may be affected significantly by neglected experimental or theoretical effects.
We examine the case for a number of proposed explanations.


title: MSSM from Ads/CFT

abstract:
  We develop a robust version of the MSSM from a $Z_{12}$ orbifolded AdS/CFT,
with natural low scale unification and briefly discuss cosmology in this
testable model.


title: An Object-Oriented Minimization Package for HEP

abstract:
  A portion of the HEP community has perceived the need for a minimization
package written in C++ and taking advantage of the Object-Oriented nature of
that langauge. To be acceptable for HEP, such a package must at least encompass
all the capabilities of Minuit. Aside from the slight plus of not relying on
outside Fortran compilation, the advantages that a C++ package based on O-O
design would confer over the multitude of available C++ Minuit-wrappers
include: Easier extensibility to different algorithms and forms opf
constraints; and usage modes which would not be available in the
global-common-based Minuit design. An example of the latter is a job persuing
two ongoing minimization problems simultaneously. We discuss the design and
implementation of such a package, which extends Minuit only in minor ways but
which greatly diminishes the programming effort (if not the algorithm thought)
needed to make more significant extensions.


title: Status of the Standard Model and Beyond

abstract:
  We present a concise review of the status of the Standard Model and of the
search for new physics.


title:
Supernova Neutrinos, Neutrino Oscillations, and the Mass of the
  Progenitor Star

abstract:
  We investigate the initial progenitor mass dependence of the early-phase
neutrino signal from supernovae taking neutrino oscillations into account. The
early-phase analysis has advantages in that it is not affected by the time
evolution of the density structure of the star due to shock propagation or
whether the remnant is a neutron star or a black hole. The initial mass affects
the evolution of the massive star and its presupernova structure, which is
important for two reasons when considering the neutrino signal. First, the
density profile of the mantle affects the dynamics of neutrino oscillation in
supernova. Second, the final iron core structure determines the features of the
neutrino burst, i.e., the luminosity and the average energy. We find that both
effects are rather small. This is desirable when we try to extract information
on neutrino parameters from future supernova-neutrino observations. Although
the uncertainty due to the progenitor mass is not small for intermediate
$\theta_{13}$ ($10^{-5} \lesssim \sin^{2}{2 \theta_{13}} \lesssim 10^{-3}$), we
can, nevertheless, determine the character of the mass hierarchy and whether
$\theta_{13}$ is very large or very small.


title: The Uses of Conformal Symmetry in QCD

abstract:
  The Lagrangian of Quantum Chromodynamics is invariant under conformal
transformations. Although this symmetry is broken by quantum corrections, it
has important consequences for strong interactions at short distances and
provides one with powerful tools in practical calculations. In this review we
give a short exposition of the relevant ideas, techniques and applications of
conformal symmetry to various problems of interest.


title:
Determination of gamma and alpha from non-leptonic B decays with SU(3)
  flavour symmetry

abstract:
  We describe in detail the method we have used to determine the CKM angles
gamma, alpha and beta using flavour symmetries between non-leptonic B decays.
This method is valid in the context of the SM but also in presence of New
Physics not affecting the amplitudes.


title:
Limits on $T_{RH}$ for thermal leptogenesis with hierarchical neutrino
  masses

abstract:
  We make a simple observation that if one of the right-chiral neutrinos is
very heavy or its Yukawa couplings to the standard lepton doublets are
negligible, so that it effectively decouples from the see-saw mechanism, the
prediction for the baryon asymmetry of the Universe resulting from leptogenesis
depends, apart from the masses $M_1$ and $M_2$ of the remaining two
right-chiral neutrinos, only on the element $\YY{22}$ of the neutrino Yukawa
coupling. For $M_2\simgt10M_1$ the lower bound on $M_1$ and also on $T_{\rm
reh}$, resulting from the requirement of 'successful leptogenesis' is then
significantly increased compared to the one computed recently by Buchm\"uller
{\it et al.} in the most general case. Within the framework of thermal
leptogenesis, the only way to lower this limit is then to allow for
sufficiently small mass difference $M_2-M_1$.


title: Radiative Scalar Meson Decays in the Light-Front Quark Model

abstract:
  We construct a relativistic $^3P_0$ wavefunction for scalar mesons within the
framework of light-front quark model(LFQM). This scalar wavefunction is used to
perform relativistic calculations of absolute widths for the radiative decay
processes$(0^{++})\to\gamma\gamma,(0^{++})\to\phi\gamma$, and
$(0^{++})\to\rho\gamma$ which incorporate the effects of glueball-$q\bar{q}$
mixing. The mixed physical states are assumed to be $f_0(1370),f_0(1500)$,and
$f_0(1710)$ for which the flavor-glue content is taken from the mixing
calculations of other works. Since experimental data for these processes are
poor, our results are compared with those of a recent non-relativistic model
calculation. We find that while the relativistic corrections introduced by the
LFQM reduce the magnitudes of the decay widths by 50-70%, the relative
strengths between different decay processes are fairly well preserved. We also
calculate decay widths for the processes $\phi\to(0^{++})\gamma$ and
$(0^{++})\to\gamma\gamm$ involving the light scalars $f_0(980)$ and $a_0(980)$
to test the simple $q\bar{q}$ model of these mesons. Our results of $q\bar{q}$
model for these processes are not quite consistent with well-established data,
further supporting the idea that $f_0(980)$ and $a_0(980)$ are not conventional
$q\bar{q}$ states.


title: Hiding relativistic degrees of freedom in the early universe

abstract:
  We quantify the extent to which extra relativistic energy density can be
concealed by a neutrino asymmetry without conflicting with the baryon asymmetry
measured by the Wilkinson Microwave Anisotropy Probe (WMAP). In the presence of
a large electron neutrino asymmetry, slightly more than seven effective
neutrinos are allowed by Big Bang Nucleosynthesis (BBN) and WMAP at 2\sigma.
The same electron neutrino degeneracy that reconciles the BBN prediction for
the primordial helium abundance with the observationally inferred value also
reconciles the LSND neutrino with BBN by suppressing its thermalization prior
to BBN.


title: On recent puzzles in the production of heavy quarkonia

abstract:
  Recently, several surprising experimental observations in the production of
heavy quarkonium have been reported. In $e^+e^-$ annihilation at
$\sqrt{s}=10.6$ GeV, Belle Collaboration finds that $J/\psi$ mesons are
predominantly produced in association with an extra $\bar{c}c$ pair, with
$\sigma(e^+e^- \to J/\psi \bar{c}c) / \sigma(e^+e^- \to J/\psi X) =
0.59^{+0.15}_{-0.13}\pm 0.12$, and the BaBar collaboration reports that the
produced $J/\psi$'s have mostly longitudinal polarization. In $\bar{p}p$
collisions at the Tevatron, the CDF Collaboration reported an excess of
$J/\psi$ and $\psi^{\prime}$ mesons at high $p_{\perp}$ over the perturbative
QCD predictions; non--perturbative approach of NRQCD can accomodate the
magnitude of the production cross section but not the observed experimentally
polarization of quarkonia. In this note we propose possible solutions to these
puzzles, and devise further experimental tests.


title:
Poles of light resonances from unitarized Chiral perturbation Theory and
  their large Nc behavior

abstract:
  We have recently completed the one loop calculation of meson-meson scattering
within Chiral Perturbation Theory. Once unitarized, these amplitudes provide
simultaneously a remarkable description of the resonance region up to 1.2 GeV
as well as the low energy region, respecting the chiral symmetry expansion. The
position of the poles in these amplitudes is related to the mass and width of
the associated resonances that are generated without being explicitly included
in the Lagrangian. The spectroscopic nature of these states can then be deduced
by studying the behavior of these poles, through the Nc dependence of the
Chiral Perturbation Theory parameters, which can be obtained from QCD in the
large Nc limit.


title:
Transmutation of Scale Dependence into Truncation Uncertainty via
  RG-Improvement of the $R(s)$ Series

abstract:
  The arbitrariness in how the logarithm is defined within the QCD series for
the inclusive electroproduction cross-section is shown to affect the summation
to all orders in $\alpha_s$ of leading and successively-subleading logarithms
within that perturbative series, even though such summations largely eliminate
the residual dependence of the original series on the arbitrary renormalization
scale $\mu$. However, given that the original (unimproved) series is known to
third-order in $\alpha_s(\mu)$, this logarithm ambiguity is shown not to enter
the optimally improved summation-of-logarithms series until the term
fourth-order in $\alpha_s(s)$, where $s$ is the physical center-of-mass energy
squared. Consequently, the ambiguity in how the logarithm is defined is
absorbable in the uncertainty associated with truncating the original
perturbative series after its calculationally known terms.


title:
Radiative Decays involving a0(980) and f0(980) in the Vector Meson
  Dominance Model

abstract:
  We summarize some features of the vector meson dominance model which was
recently proposed for studying radiative decays involving the scalar mesons.
Using the experimental values of $\Gamma(a_0 \to \gamma\gamma)$, $\Gamma(f_0
\to \gamma\gamma)$ and $\Gamma(\phi \to a_0 \gamma)$ as inputs, we show that
the model predicts a large hierarchy between $\Gamma(a_0 \to \omega \gamma)$
and $\Gamma(a_0 \to \rho \gamma)$ as well as between $\Gamma(f_0 \to \omega
\gamma)$ and $\Gamma(f_0 \to \rho \gamma)$.


title:
Thermodynamics of strong coupling 2-color QCD with chiral and diquark
  condensates

abstract:
  2-color QCD (quantum chromodynamics with N_c=2) at finite temperature T and
chemical potential \mu is revisited in the strong coupling limit on the lattice
with staggered fermions. The phase structure in the space of T, \mu, and the
quark mass m is elucidated with the use of the mean field approximation and the
1/d expansion (d being the number of spatial dimensions). We put special
emphasis on the interplay among the chiral condensate <\bar{q}q>, the diquark
condensate <qq>, and the quark density <q^{\dagger}q> in the T-\mu-m space.
Simple analytic formulae are also derived without assuming \mu nor m being
small. Qualitative comparisons are made between our results and those of recent
Monte-Carlo simulations in 2-color QCD.


title: A strong dissipative inflationary model

abstract:
  The dynamics of a single scalar field which describes a second order phase
transition is considered taking into account the thermal effects in the high
temperature limit. I conclude that thermal effects play a very important role
during inflation and do not must to be ignored in models for the early
universe. At the end of inflation thermal fluctuations are more important than
quantum fluctuations, due to the fact that $T > H_c$.


title: TeV Colored Higgsinos in Alternative Grand Unified Theories

abstract:
  Recently, a type of GUT models with an extra dimension in AdS space can
successfully solve the doublet-triplet problem, maintain proton stability, and
allow the colored Higgs bosons and colored Higgsinos in the TeV mass region. We
study the hadronic production and detection of these TeV colored Higgsinos and
Higgs bosons. If the colored Higgsino is lighter than the colored Higgs boson,
the colored Higgs boson will decay into a colored Higgsino and a gluino or a
gravitino, and vice versa. The signatures would be stable massive charged
particles with jets or missing energies.


title: Induced Universal Properties and Deconfinement

abstract:
  We propose a general strategy to determine universal properties induced by a
nearby phase transition on a non-order parameter field. A general
renormalizable Lagrangian is used, which contains the order parameter and a
non-order parameter field, and respects all the symmetries present. We
investigate the case in which the order parameter field depends only on space
coordinates and the case in which this field is also time dependent. We find
that the spatial correlators of the non-order parameter field, in both cases,
are infrared dominated and can be used to determine properties of the phase
transition. We predict a universal behavior for the screening mass of a generic
singlet field, and show how to extract relevant information from such a
quantity. We also demonstrate that the pole mass of the non-order parameter
field is not infrared sensitive. Our results can be applied to any continuous
phase transition. As an example we consider the deconfining transition in pure
Yang-Mills theory, and show that our findings are supported by lattice data.
Our analysis suggests that monitoring the spatial correlators of different
hadron species, more specifically the derivatives of these, provides an
efficient and sufficient way to experimentally uncover the deconfining phase
transition and its features.


title:
Approximate Lorentz invariance of the vacuum: a physical solution of the
  `hierarchy problem' ?

abstract:
  In the `condensed phase' of effective quantum field theories one expects
deviations from exact Lorentz invariance at ultralow momenta | k| < delta where
the shell 'delta' should only vanish in the strict local limit of the theory
when the ultraviolet cutoff 'Lambda' tends to infinity. I explore this idea for
the Higgs condensate suggesting that, in this case, the resulting relation
connecting 'delta', 'Lambda' and the Fermi scale might provide a simple
physical solution of the `hierarchy problem'. In this picture, the Planck scale
is not a purely ultraviolet quantity but embodies in its numerical value the
peculiar infrared-ultraviolet connection that is realized in the scalar
condensate.


title: Testing the Mechanism of R-parity Breaking with Slepton LSP Decays

abstract:
  In supersymmetric models R-parity can be violated through either bilinear or
trilinear terms in the superpotential, or both. If charged scalar leptons are
the lightest supersymmetric particles, their decay properties can be used to
obtain information about the relative importance of these couplings. We show
that in some specific scenarios it is even possible to decide whether bilinear
or trilinear terms give the dominant contribution to the neutrino mass matrix.


title:
Neutrino Physics: Where Do We Stand, and Where Are We Going? -- The
  Theoretical-Phenomenological Perspective

abstract:
  The discoveries and open questions in neutrino physics, as reported at
Neutrino 2002 and more recently, are reviewed from a theoretical perspective.


title: Neutrino Physics, Superbeams, and the Neutrino Factory

abstract:
  We summarize what has been learned about the neutrino mass spectrum and
neutrino mixing, identify interesting open questions that can be answered by
accelerator neutrino facilities of the future, and discuss the importance and
physics of answering them.


title:
Color Superconductivity in Schwinger-Dyson Approach -- Strange Quark
  Mass and Color-Flavor Unlocking Line --

abstract:
  Phase structure and phase transitions in dense QCD are studied using the
Schwinger-Dyson (SD) method in the improved ladder approximation. We construct
the Cornwall-Jackiw-Tomboulis (CJT) effective potentials at finite temperature
for two types of pairing ansatz, namely the Color-Flavor locking (CFL) state
and the two flavor superconducting (2SC) state. Strong coupling effects at low
densities, such as the off-Fermi surface and antiquarks contribution to the
pairing gap due to the large effective coupling, make the gap, critical
temperature and those ratio deviate from those weak coupling values.
Nevertheless, the ratio of the physical quantity for the CFL and that for the
2SC does not differ so much from the weak coupling value, as long as the
pairing interaction is taken to be the same for the both cases. As a
consequence, the CFL state always dominates over 2SC state and the critical
temperatures to quark-gluon plasma (QGP) from both states coincides in the
chiral limit. The energy gain in the CFL state relative to the 2SC state gets
smaller towards the critical line dividing (mu, T) plane into the QGP and CFL
phases, and thus small perturbations can remove the degeneracy of these
critical lines. As one of such perturbations, the effect of the strange quark
mass m_s on the quark-pairing is examined. In particular, using a simple
kinematical criterion, we discuss the behaviour of the ``color-flavor unlocking
line'' on which the CFL phase turns into the 2SC phase, against the variation
of m_s.


title: Neutrino Physics after KamLAND

abstract:
  The neutrino anomalies were driving force of the developments in neutrino
physics during the last 30 - 35 years. I will consider status of the anomalies
after the first KamLAND result. The main questions are "What is left?" and
"What is the next?" In the new phase, the phenomenological objectives of
neutrino physics consist of accomplishing the program of reconstruction of the
neutrino mass and flavor spectrum and searches for physics beyond the
``standard'' picture. The latter includes searches for new (sterile) neutrino
states, new neutrino interactions, effects of violation of the fundamental
symmetries in the neutrino sector.


title: Chargino contributions to the CP asymmetry in B -> Phi K(S) decay

abstract:
  We perform a model independent analysis of the chargino contributions to the
CP asymmetry in B -> Phi K(S) process. We use the mass insertion approximation
method generalized by including the possibility of a light right-stop. We find
that the dominant effect is given by the contributions of the mass insertions
deltaU_LL(32) and deltaU_RL(32) to the Wilson coefficient of the chromomagnetic
operator. By considering both these contributions simultaneously, the CP
asymmetry in B -> Phi K(S) process is significantly reduced and negative
values, which are within the 1-sigma experimental range and satisfy the b -> s
gamma constraints, can be obtained.


title: In-Medium Effects on Charmonium Production in Heavy-Ion Collisions

abstract:
  Charmonium production in heavy-ion collisions is investigated within a
kinetic theory framework incorporating in-medium properties of open- and
hidden-charm states in line with recent QCD lattice calculations. A
continuously decreasing open-charm threshold across the phase boundary of
hadronic and quark-gluon matter is found to have important implications for the
equilibrium abundance of charmonium states. The survival of $J/\psi$ resonance
states above the transition temperature enables their recreation also in the
Quark-Gluon Plasma. Including effects of chemical and thermal off-equilibrium,
we compare our model results to available experimental data at CERN-SPS and
BNL-RHIC energies. In particular, earlier found discrepancies in the
$\psi'/\psi$ ratio can be resolved.


title:
Prospects for discovery of physics beyond the Standard Model at the
  Pierre Auger Observatory

abstract:
  I summarize the discovery potential for physics beyond the electroweak scale
at the Pierre Auger Observatory. This observatory is designed to study
ultra-high energy cosmic rays with unprecedented precision, with the primary
goal of shedding light on their composition and origins. In addition, since the
center-of-mass energies of Auger events are well beyond those reached at
terrestrial colliders, they provide an opportunity to search for new physics. I
discuss here some of the relevant observables and techniques which may be used
to weed out theories beyond the standard model.


title:
Anomalous Dimension Matrix for Radiative and Rare Semileptonic B Decays
  up to Three Loops

abstract:
  We compute the complete O(alphas^2) anomalous dimension matrix relevant for
the b to s gamma, b to s gluon and b to s l+l- transitions in the standard
model and some of its extensions. For radiative decays we confirm the results
of Misiak and Munz, and of Chetyrkin, Misiak and Munz. The O(alphas^2) mixing
of four-quark into semileptonic operators is instead a new result and
represents one of the last missing ingredients of the
next-to-next-to-leading-order analysis of rare semileptonic B meson decays.


title: Charmonium production in polarized high-energy collisions

abstract:
  We investigate the inclusive production of prompt J/psi mesons in polarized
hadron-hadron, photon-hadron, and photon-photon collisions in the factorization
formalism of nonrelativistic quantum chromodynamics (NRQCD) providing all
contributing partonic cross sections in analytic form. In the case of
photoproduction, we also include the resolved-photon contributions. We present
numerical results appropriate for BNL RHIC-Spin, the approved SLAC fixed-target
experiment E161, and the e^+e^- and gamma gamma modes of TESLA. Specifically,
we assess the feasibility to access the spin-dependent parton distributions in
the polarized proton and photon. We also point out that preliminary data on
J/psi inclusive production taken by the PHENIX Collaboration in unpolarized
proton-proton collisions at RHIC tends to favor the NRQCD factorization
hypothesis, while it significantly overshoots the theoretical prediction of the
color-singlet model at large values of transverse momentum.


title: Running coupling and fermion mass in strong coupling QED

abstract:
  Simple toy model is used in order to exhibit the technique of extracting the
non-perturbative information about Green's functions in Minkowski space. The
effective charge and the dynamical electron mass are calculated in strong
coupling 3+1 QED by solving the coupled Dyson-Schwinger equations for electron
and photon propagators. The minimal Ball-Chiu vertex was used for simplicity
and we impose the Landau gauge fixing on QED action. The solution obtained
separately in Euclidean and Minkowski space were compared, the latter one was
extracted with the help of spectral technique.


title: One-loop corrections to polarization observables

abstract:
  We review the physics of polarization observables in high energy reactions in
general and discuss the status of \NLO one--loop corrections to these
observables in specific. Many high order radiative corrections exists for rates
but not many \NLO radiative corrections exist for polarization observables. The
radiative correction calculations for polarization observables are somewhat
more complicated than those for rates. They tend to be smaller than those for
the rates. In most of the examples we discuss we include mass effects which
significantly complicate the radiative correction calculations. We elaborate a
general scheme which allows one to enumerate the number of independent density
matrix elements in a reaction and provide explicit examples of angular decay
distributions in self--analyzing decays that allow one to experimentally
measure the density matrix elements. We provide examples of reactions where
certain density matrix elements are only populated at \NLO or by mass effects.
In our discussion we concentrate on semileptonic bottom and top quark decays
which are linked to leptonic $ \mu $ and $ \tau $ decays through a Fierz
transformation.


title: Theoretical error of luminosity cross section at LEP

abstract:
  The aim of this note is to characterize briefly main components of
theoretical error of the small angle Bhabha measurement at LEP and to discuss
critically how solid these estimates really are, from todays perspective. We
conclude that the existing theoretical error of the LEP luminometer process
(small angle Bhabha) is rather solid, and we add some new discussion concerning
the remaining uncertainties and prospects of the future improvements toward the
$\le 0.025%$ precision.


title: Time Variation of the Fine Structure Constant Driven by Quintessence

abstract:
  There are indications from the study of quasar absorption spectra that the
fine structure constant $\alpha$ may have been measurably smaller for redshifts
$z>2.$ Analyses of other data ($^{149}$Sm fission rate for the Oklo natural
reactor, variation of $^{187}$Re $\beta$-decay rate in meteorite studies,
atomic clock measurements) which probe variations of $\alpha$ in the more
recent past imply much smaller deviations from its present value. In this work
we tie the variation of $\alpha$ to the evolution of the quintessence field
proposed by Albrecht and Skordis, and show that agreement with all these data,
as well as consistency with WMAP observations, can be achieved for a range of
parameters. Some definite predictions follow for upcoming space missions
searching for violations of the equivalence principle.


title: Diffraction at the Tevatron in Perspective

abstract:
  We review the results of measurements on soft and hard diffractive processes
performed by the CDF Collaboration at the Fermilab Tevatron pbar-p collider in
run I and place them in perspective by internal comparisons, as well as by
comparisons with results obtained at the HERA e-p collider and with theoretical
expectations.


title:
Neutral Higgs boson contributions to CP asymmetry of $B \to \Phi K_S$ in
  MSSM

abstract:
  We have studied the neutral Higgs boson (NHB) contributions to the pure
penguin process $B\to \phi K_S$ in MSSM with middle and large $\tan\beta$ (say,
$>$ 8). We show that the $\alpha_s$ order hadronic matrix elements of NHB
induced operators can make sizable effects on both the branch ratio and time
dependent CP asymmetry $S_{\phi K}$. Under the all relevant experimental
constraints, the Higgs mediated contributions to $S_{\phi K}$ alone can provide
a significant deviation from SM and, in particular, lead to a negative $S_{\phi
K}$ which is reported by BaBar and Belle.


title: Generalized Fierz identities

abstract:
  Low energy weak interactions calculations with fermions frequently involve a
superposition of quartic products of Dirac spinors, in which the order of the
spinors is not the same in all the contributing terms. A common trick that is
used to bring them to a uniform ordering is the Fierz transformation. We show
that the standard Fierz rearrangement formula quoted in textbooks is one
element of a class of transformations of a quartic product amplitude, under
which the spinors are rearranged with different orderings and, in the general
case, some or all of the spinors are transformed to their Lorentz-invariant
complex conjugate form. We give a pedagogical derivation of the explicit forms
of all such transformation matrices. In addition to the usual Lorentz scalar
quartic products, we consider pseudoscalar ones as well. Such manipulations and
formulas are useful, in particular, when some of the fermions involved are
Majorana particles.


title: Gauged B-3L_\tau, low-energy unification and proton decay

abstract:
  We point out that if there is a gauged $B-3L_\tau$ symmetry at low energy, it
can prevent fast proton decay. This may help building models with theories with
extra dimensions at the TeV scale. For purpose of illustration we present an
explicit model with large extra dimensions. The Higgs required for a realistic
fermion masses and mixing are included. The problem of neutrino masses are
solved with triplet Higgs scalars. The proton remains stable even after the
$B-3L_\tau$ symmetry breaking.


title:
The $p_T$-Spectra of Some Non-pion Secondaries in High Energy NN to
  NA/AA Collisions and the Combinational Approach

abstract:
  In continuation of our perusal of the studies on transverse momentum spectra
for the main varieties of secondaries from a consistent and comprehensive
phenomenological approach, we propose to take up here -- after a successful
completion of reporting in detail the results (Ref.[4] in the text) on our
analyses of the $p_T$-spectra of pions -- the studies specially on production
of kaons, protons and antiprotons in several proton-induced and
nucleus-involved collisions at high energies. The measured data on inclusive
cross sections of kaons, protons and antiprotons from the various published
sources have here been assorted first. Next, data on the $p_T$-spectra of the
specific secondaries produced in PP and $P\bar{P}$ reactions have been scanned
and analyzed with the help of Hagedorn's model(HM). Thereafter a connector,
named here the combinational approach(CA), has been constructed and used to
analyze the data on $p_T$-spectra of some major category of non-pion
secondaries produced in nucleus-nucleus(AA/AB) collisions at high energies. And
these exercises have, finally, led to the modestly successful interpretations
of a wide band of data with the revelation of some insightful physical aspects
of high energy interactions. The limitations of the approach have also been
precisely pointed out in the end.


title: Study of color connections in $e^+ e^-$ annihilation

abstract:
  We replace in the event generator JETSET the color singlet chain connection
with the color separate state one as the interface between the hard and soft
sectors of hadronic processes. The modified generator is applied to produce the
hadronic events in $e^+ e^-$ annihilation. It describes the experimental data
at the same level as the original JETSET with default parameters. This should
be understood as a demonstration that color singlet chain is not the unique
color connection. We also search for the difference in special sets of
three-jet events arising from different color connections, which could subject
to further experimental test.


title:
Double Logarithmic Terms $ln^2x$ in the Heavy Quark Production
  $\sigma(P\bar P \to h\bar h) - \sigma(PP \to h\bar h)$ Cross Sections

abstract:
  Predictions for the difference of proton-antiproton and proton-proton cross
sections in the heavy quark production within LO DGLAP analysis together with
the $ln^2x$ terms resummation are presented. An important role of the double
logarithmic $ln^2x$ corrections in a case of the large rapidity gap between a
quark and an antiquark is discussed.


title: Charmless Two-body Baryonic B Decays

abstract:
  We study charmless two-body baryonic B decays in a diagramatic approach.
Relations on decay amplitudes are obtained. In general there are more than one
tree and more than one penguin amplitudes. The number of independent amplitudes
can be reduced in the large m_B limit. It leads to more predictive results.
Some prominent modes for experimental searches are pointed out.


title:
Exploring flavor structure of supersymmetry breaking from rare B decays
  and unitarity triangle

abstract:
  We study effects of supersymmetric particles in various rare B decay
processes as well as in the unitarity triangle analysis. We consider three
different supersymmetric models, the minimal supergravity, SU(5) SUSY GUT with
right-handed neutrinos, and the minimal supersymmetric standard model with U(2)
flavor symmetry. In the SU(5) SUSY GUT with right-handed neutrinos, we consider
two cases of the mass matrix of the right-handed neutrinos. We calculate direct
and mixing-induced CP asymmetries in the b to s gamma decay and CP asymmetry in
B_d to phi K_S as well as the B_s--anti-B_s mixing amplitude for the unitarity
triangle analysis in these models. We show that large deviations are possible
for the SU(5) SUSY GUT and the U(2) model. The pattern and correlations of
deviations from the standard model will be useful to discriminate the different
SUSY models in future B experiments.


title: The C parameter distribution in e+e- annihilation

abstract:
  We study perturbative and non-perturbative aspects of the distribution of the
C parameter in e+e- annihilation using renormalon techniques. We perform an
exact calculation of the characteristic function, corresponding to the C
parameter differential cross section for a single off-shell gluon. We then
concentrate on the two-jet region, derive the Borel representation of the
Sudakov exponent in the large-beta_0 limit and compare the result to that of
the thrust T. Analysing the exponent, we distinguish two ingredients: the jet
function, depending on Q^2C, summarizing the effects of collinear radiation,
and a function describing soft emission at large angles, with momenta of order
QC. The former is the same as for the thrust upon scaling C by 1/6, whereas the
latter is different. We verify that the rescaled C distribution coincides with
that of 1-T to next-to-leading logarithmic accuracy, as predicted by Catani and
Webber, and demonstrate that this relation breaks down beyond this order owing
to soft radiation at large angles. The pattern of power corrections is also
similar to that of the thrust: corrections appear as odd powers of Lambda/(QC).
Based on the size of the renormalon ambiguity, however, the shape function is
different: subleading power corrections for the C distribution appear to be
significantly smaller than those for the thrust.


title: Neutrino Mass, Flavour and CP Violation

abstract:
  In this talk I discuss the connection between neutrino mass, flavour and CP
violation. I focus on three neutrino patterns of neutrino masses and mixing
angles, and the corresponding Majorana mass matrices. I discuss the see-saw
mechanism, and show how it may be applied in a very natural way to give a
neutrino mass hierarchy with large atmospheric and solar angles by assuming
sequential right-handed neutrino dominance. I then distinguish between heavy
sequential dominance and light sequential dominance, and show how lepton
flavour violation in the CMSSM provides a way to discriminate between these two
possibilities. I also show that for a well motivated class of light sequential
dominance models there is a link between leptogenesis and CP violation
measurable in neutrino oscillation experiments.


title: Spontaneous CP Violation in the U(3) NJL Model

abstract:
  With the help of the functional integration method, the formation of scalar,
pseudoscalar condensates, and dynamical symmetry breaking in the U(3)
four-fermion model has been investigated. We show the possibility of
spontaneous CP symmetry violation in the model under consideration. The
bosonization procedures of the model are performed; the propagators of quarks,
scalar and pseudoscalar fields are calculated in one loop approximation. The
masses of the scalar and pseudoscalar mesons are evaluated.


title: A New State of Baryonium

abstract:
  The recent discovery of a narrow resonance in the decay $J/\psi \to \gamma p
\bar{p}$ is described as a zero baryon number,
  ``deuteron-like singlet ${}^1S_0 $'' state. The difference in binding energy
of the deuteron (-2.225 MeV) and of the new state (-17.5 MeV) can be accounted
for in a simple potential model with a $\lambda \cdot \lambda$ confining
interaction.


title: Electromagnetic radiation from relativistic nuclear collisions

abstract:
  We review some of the results obtained in the study of the production of
electromagnetic radiation in relativistic nuclear collisions. We concentrate on
the emission of real photons and dileptons from the hot and dense strongly
interacting phases of the reaction. We examine the contributions from the
partonic sector, as well as those from the nonperturbative hadronic sector. We
examine the current data, some of the predictions for future measurements, and
comment on what has been learnt so far.


title: Flow Buildup in a Mixed Phase of Quark-Gluon Plasma Plus Hadrons

abstract:
  Transport processes are considered for their abilities to generate flow in a
mixed-phase system of hadrons plus quark-gluon plasma exhibiting temperature
and density gradients. Diffusive mechanisms are found to be the leading
sources. Even after overcoming viscous effects, conductive and diffusive forces
generate flow velocities for pions in a model using kinetic theory to within
fifteen percent of light speed. Since such flow is not observed, this could
possibly rule out the mixed phase in the evolution of high energy heavy ion
collisions.


title: Fact and Fancy in Neutrino Physics II

abstract:
  This brief and opinionated essay evolved from my closing talk at the Tenth
International Workshop on Neutrino Telescopes, held in Venice in March 2003.
Portions were inspired by several excellent presentations at the Workshop.
Other scattered comments about neutrino physics relate to variations of the
seesaw model yielding the FGY ansatz, or to those yielding significant
suppressive mixing of neutrino amplitudes.


title: Spin dependent structure function $g_1(x,Q^2)$ at low x and low $Q^2$

abstract:
  This is a review of experimental and phenomenological investigations of the
nucleon spin dependent structure function $g_1$ at low values of $x$ and $Q^2$.


title:
Compatibility of Quark and Resonant Picture Excited Baryon Multiplets in
  1/N_c

abstract:
  We demonstrate that the two major complementary pictures of large N_c baryon
resonances--as single-quark orbital excitations about a closed-shell core
[giving SU(2N_F) x O(3) multiplets], and as resonances in meson-baryon
scattering amplitudes--are completely compatible in a specific sense: Both
pictures give rise to a set of multiplets of degenerate states, for which any
complete spin-flavor multiplet within one picture fills the quantum numbers of
complete multiplets in the other picture. This result is demonstrated by: (i)
straightforward computation of the lowest multiplets in both pictures; (ii) a
study of the nature of quark excitations in a hedgehog picture; (iii) direct
group-theoretical comparison of the constraints in the two pictures.


title: Is QCD asymptotically free?

abstract:
  The asymptotical behaviour of the QCD coupling strength is considered. Its
upper bound is found from the present experimental data. The assumption about
the finite asymptotical value of the coupling strength leads to the energy
scale where the perturbative predictions would fail. Possible tests of this
assumption are considered.


title: The Bose-Einstein correlations from a Quantum Field Theory perspective

abstract:
  Using a specific version of thermal Quantum Field Theory (QFT), supplemented
by operator-field evolution of the Langevin type, we discuss two issues
concerning the Bose Einstein correlations (BEC): the origin of different
possible coherent behaviour of the emitting source and the origin of the
observed shape of the BEC function $C_2(Q)$. We demonstrate that previous
conjectures in this matter obtained by other approaches are confirmed and have
received complementary explanation.


title:
Chiral symmetry breaking, color superconductivity and color neutral
  quark matter: a variational approach

abstract:
  We investigate the vacuum realignment for chiral symmetry breaking and color
superconductivity at finite density in Nambu-Jona-Lasinio model in a
variational method. The treatment allows us to investigate simultaneous
formation of condensates in quark antiquark as well as in diquark channels. The
methodology involves an explicit construction of a variational ground state and
minimisation of the thermodynamic potential. Color and electric charge
neutrality conditions are imposed through introduction of appropriate chemical
potentials. Color and flavor dependent condensate functions are determined
through minimisation of the thermodynamic potential. The equation of state is
calculated. Simultaneous existence of a mass gap and superconducting gap is
seen in a small window of quark chemical potential within the model when charge
neutrality conditions are not imposed. Enforcing color and electric charge
neutrality conditions gives rise to existence of gapless superconducting modes
depending upon the magnitude of the gap and the difference of the chemical
potentials of the condensing quarks.


title: Production and detection of very light bosons in the HERA tunnel

abstract:
  There are strong theoretical arguments in favour of the existence of very
light scalar or pseudoscalar particles beyond the Standard Model which have, so
far, remained undetected, due to their very weak coupling to ordinary matter.
We point out that after HERA has been decommissioned, there arises a unique
opportunity for searches for such particles: a number of HERA's four hundred
superconducting dipole magnets might be recycled and used for laboratory
experiments to produce and detect light neutral bosons that couple to two
photons, such as the axion. We show that, in this way, laser experiments
searching for photon regeneration or polarization effects in strong magnetic
fields can reach a sensitivity which is unprecedented in pure laboratory
experiments and exceeds astrophysical limits from stellar evolution
considerations.


title: Poincare' invariance constraints on NRQCD and potential NRQCD

abstract:
  We discuss the constraints induced by the algebra of the Poincare' generators
on non-relativistic effective field theories. In the first part we derive some
relations among the matching coefficients of the HQET (and NRQCD), which have
been formerly obtained by use of reparametrization invariance. In the second
part we obtain new constraints on the matching coefficients of pNRQCD.


title: An Intuitive Semiclassical Picture of Proton Structure at Small x

abstract:
  A semiclassical description of structure functions in DIS at small $x$ is
presented. It gives an intuitive picture of the transition from the Double
Leading Log approximation at large $Q^2$, to the powerlike dependence on $x$ in
the BFKL region at limited $Q^2$. Formal derivations from perturbative QCD,
e.g. in the BFKL or the CCFM formalisms, are technically complicated, and
therefore such an intuitive picture may be valuable and possibly helpful in the
work towards a better understanding of DIS, and of the strong interaction in
general.


title:
Next-to-leading order jet distributions for Higgs boson production via
  weak-boson fusion

abstract:
  The weak-boson fusion process is expected to provide crucial information on
Higgs boson couplings at the Large Hadron Collider at CERN. The achievable
statistical accuracy demands comparison with next-to-leading order QCD
calculations, which are presented here in the form of a fully flexible parton
Monte Carlo program. QCD corrections are determined for jet distributions and
are shown to be modest, of order 5 to 10% in most cases, but reaching 30%
occasionally. Remaining scale uncertainties range from order 5% or less for
distributions to below +-2% for the Higgs boson cross section in typical
weak-boson fusion search regions.


title: Squark Mixing in Electron-Positron Reactions

abstract:
  Squark mixing plays a large role in the phenomenology of the minimal
supersymmetric standard model, determining the mass of the lightest Higgs boson
and the electroweak interactions of the squarks themselves. We examine how
mixing may be investigated in high energy $e^+ e^-$ reactions, both at LEP-II
and the proposed linear collider. In particular, off-diagonal production of one
lighter and one heavier squark allows one to measure the squark mixing angle,
and would allow one to test the mass relations for the light Higgs boson. In
some cases off-diagonal production may provide the best prospects to discover
supersymmetry. In the context of the light bottom squark scenario, we show that
existing data from LEP-II should show definitive evidence for the heavier
bottom squark provided that its mass $m_{\tilde{b}_2} \le 120$ GeV.


title: Vector Component of Confinement Force and P-Wave Spectrum of D mesons

abstract:
  The mass spectrum and the pionic decay widths of the P-wave $D$ mesons are
studied using the Dirac equation for the light quark. Our aim is to determine
the Lorentz property of the confinement force. We find that the Lorentz scalar
confinement is consistent with the mass spectrum, while a significant mixture
of the Lorentz vector confinement is necessary to explain the decay widths.


title:
Muon anomalous magnetic moment and the heavy photon in a little Higgs
  model

abstract:
  In the Littlest Higgs model, we comprehensively study the phenomenology of
the heavy photon A_H which is lightest, in most of the parameter space, among
newly introduced heavy gauge bosons and top-like vector quark. Unexpected
behavior is that lighter A_H suppresses the corrections to the electroweak
precision observables. For the global symmetry breaking scale f~3TeV, the heavy
photon can be light enough to be produced at the 500 GeV linear collider.
Through the calculation of the one-loop correction to the muon anomalous
magnetic moment, we show that even the light A_H with mass around 200 GeV
results in the negligible contribution. This is consistent with the current
inconclusive status of the theoretical calculation of the (g-2)_mu in the SM.
The effects of the Littlest Higgs model on the process e+ e- -> mu+ mu- are
also studied, which is one of the most efficient signals to probe the A_H.


title: Regge residues from DGLAP evolution

abstract:
  We show that combining forward and backward evolution allows to extract the
residues of the triple-pole pomeron and of the other singularities for 10
GeV$^2 \le Q^2 \le 1000$ GeV$^2$. In this approach, the essential singularity
generated by the DGLAP evolution is considered as a numerical approximation to
a triple-pole pomeron. Using an analytical expression for the form factors, we
reproduce the experimental data with a $\chi^2/dof$ of 1.02. This proves the
compatibility between Regge theory and DGLAP evolution. The method used here
enables us to evaluate the uncertainties on the gluon distribution which prove
to be large at small $x$ and small $Q^2$.


title: Superconducting phase transition in the Nambu - Jona-Lasinio model

abstract:
  The Nambu - Bogoliubov - de Gennes method is applied to the problem of
superconducting QCD. The effective quark-quark interaction is described within
the framework of the Nambu - Jona-Lasinio model. The details of the phase
diagram are given as a function of the strength of the quark-quark coupling
constant $G^{\prime}$. It is find that there is no superconducting phase
transition when one uses the relation between the coupling constants
$G^{\prime}$ and $G$ of the Nambu - Jona-Lasinio model which follows from the
Fierz transformation. However, for other values of $G^{\prime}$ one can find a
rich phase structure containing both the chiral and the superconducting phase
transitions.


title: Detecting the neutral top-pion at future muon colliders

abstract:
  The signals of the neutral top-pion $\pi^{0}_{t}$ at the first muon collider
(FMC) are discussed by calculating its contributions to the processes
$\mu^{+}\mu^{-}\longrightarrow b\bar{b}$ and $\mu^{+}\mu^{-}\longrightarrow
\bar{t}c$. We find that the contributions to the process
$\mu^{+}\mu^{-}\longrightarrow b\bar{b}$ are very small and the ratio of signal
over square root of the background ($S/\sqrt{B})$ is smaller than 0.2. However,
in most of the parameter space, the $\pi^{0}_{t}$ can generate 36 and up to 649
observable $\bar{t}c$ events at the FMC. The signals of the neutral top-pion
$\pi^{0}_{t}$ may be detected via the process $\mu^{+}\mu^{-}\longrightarrow
\bar{t}c$ at the FMC.


title: Magnetised Neutron Stars : An Overview

abstract:
  In the presence of strong magnetic field reported to have been observed on
the surface of some neutron stars and on what are called Magnetars, a host of
physical phenomenon from the birth of a neutron star to free streaming neutrino
cooling phase will be modified. In this review I will discuss the effect of
magnetic field on the equation of state of high density nuclear matter by
including the anomalous magnetic moment of the nucleons into consideration. I
would then go over to discuss the neutrino interaction processes in strong as
well as in weak magnetic fields. The neutrino processes are important in
studying the propagation of neutrinos and in studying the energy loss, Their
study is a prerequisite for the understanding of actual dynamics of supernova
explosion and on the stabilization of radial pulsation modes through the effect
on bulk viscosity. The anisotropy introduced in the neutrino emission and
through the modification of the shape of the neutrino sphere may explain the
observed pulsar kicks.


title:
Quantization on a 2-dimensional phase space with a constant curvature
  tensor

abstract:
  Some properties of the star product of the Weyl type (i.e. associated with
the Weyl ordering) are proved. Fedosov construction of the *-product on a
2-dimensional phase spacewith a constant curvature tensor is presented.
Eigenvalue equations for momentum p and position q on a 2-dimensional phase
space with constant curvature tensors are solved.


title:
Relation between Wigner functions and the source functions used in the
  description of Bose-Einstein correlations in multiple particle production

abstract:
  Relations between Wigner functions and the source functions used in models of
Bose-Einstein correlations in multiple particle production are derived and
discussed. These relations are model dependent. In particular it is important
whether the particles are emitted simultaneously and if not, whether the
production amplitudes corresponding to different moments of time can interfere
with each other.


title:
Neutralino relic density in supersymmetric GUTs with no-scale boundary
  conditions above the unification scale

abstract:
  We investigate SU(5) and SO(10) GUTs with vanishing scalar masses and
trilinear scalar couplings at a scale higher than the unification scale. The
parameter space of the models, further constrained by b-\tau Yukawa coupling
unification, consists of a common gaugino mass and of \tan\beta. We analyze the
low energy phenomenology, finding that A-pole annihilations of neutralinos
and/or coannihilations with the lightest stau drive the relic density within
the cosmologically preferred range in a significant region of the allowed
parameter space. Implications for neutralino direct detection and for CERN LHC
experiments are also discussed.


title: Mirror matter

abstract:
  One of the deepest unsolved puzzles of subatomic physics is why Nature
prefers the left particles to the right ones. Mirror matter is an attempt to
understand this mystery by assuming the existence of a "parallel''world where
this preference is exactly opposite. Thus in the Universe consisting of the
ordinary and the mirror matter the symmetry between the left and right is
completely restored. Mirror matter is constrained to interact with us only very
weakly. Still, its existence can be inferred by using experimental evidence
such as the observation of astrophysical objects related to the dark matter
(MACHO), neutrino physics and other sources. This talk will focus on several
key aspects of mirror matter physics including the possible existence of mirror
matter inside the Earth and the suggestion that the recently observed
"isolated" planets may in fact be orbiting around mirror stars.


title: Impact parameter dependent quark distribution of the pion

abstract:
  We present first results for the impact parameter dependent quark
distribution in the pion obtained in transverse lattice gauge theory, and
discuss recent predictions from other models.