title: A 2-3 Symmetry in Neutrino Oscillations

abstract:
  Maximum mixing in atmospheric neutrino oscillation, as well as vanishing of
the MNS matrix element $U_{e3}$, are consequences of a 2-3 symmetry, under
which the neutrino mass matrix is invariant under the interchange of second and
third generation neutrinos. These predictions of the 2-3 symmetry are
consistent with the results of Super-Kamiokande, K2K, and CHOOZ experiments. If
the symmetry is exact at a high-energy scale set by right-handed neutrinos, a
deviation from these predictions generated by renormalization-group corrections
will occur at experimental energies. With an MSSM dynamics, the result can be
made to agree with a global fit of the neutrino data, if normal hierarchy is
assumed on the neutrino mass spectrum and if the mass of the electron-neutrino
is at least about 0.025 eV. The presence of this mass lower bound is a novel
and interesting feature of the symmetry that can be falsified by future
experiments. Of the three viable solar neutrino solutions, only LMA gives a
sizable MNS matrix element $U_{e3}$ that can hopefully be detected in future
reactor experiments. Inverted neutrino mass hierarchy is not permitted by this
symmetry.


title: Skewed quark distribution of the pion in the light-front quark model

abstract:
  We calculate the skewed quark distributions(SQDs) of the pion in the
light-front quark model, and discuss the calculation of the nonvalence
contribution to the SQDs in this model. The frame-independence of our model
calculation is guaranteed by the constraint of the sum rule between the SQDs
and form factor. Our numerical results show large nonvalence contributions to
the SQDs at small momentum transfer region as the skewedness increases.


title:
Hadronization corrections to helicity components of the fragmentation
  function

abstract:
  In the hadronic decays of Z, gluon emission leads to the appearance of the
longitudinal component of the fragmentation function, F_L. Measurement of F_L
and the transverse component, F_T, could thus provide an insight into the gluon
fragmentation function. However, hadronization corrections at low x can be
significant. Here we present a method of accounting for such corrections, using
the JETSET event generator as illustration.


title: Space-time symplectic extension

abstract:
  It is conjectured that in the origin of space-time there lies a symplectic
rather than metric structure. The complex symplectic symmetry Sp(2l,C), l\ge1
instead of the pseudo-orthogonal one SO(1,d-1), d\ge4 is proposed as the
space-time local structure group. A discrete sequence of the metric space-times
of the fixed dimensionalities d=(2l)^2 and signatures, with l(2l-1) time-like
and l(2l+1) space-like directions, defined over the set of the Hermitian
second-rank spin-tensors is considered as an alternative to the
pseudo-Euclidean extra dimensional space-times. The basic concepts of the
symplectic framework are developed in general, and the ordinary and
next-to-ordinary space-time cases with l=1,2, respectively, are elaborated in
more detail. In particular, the scheme provides the rationale for the
four-dimensionality and 1+3 signature of the ordinary space-time.


title: CPT, T, and Lorentz Violation in Neutral-Meson Oscillations

abstract:
  Tests of CPT and Lorentz symmetry using neutral-meson oscillations are
studied within a formalism that allows for indirect CPT and T violation of
arbitrary size and is independent of phase conventions. The analysis is
particularly appropriate for studies of CPT and T violation in oscillations of
the heavy neutral mesons D, B_d, and B_s. The general Lorentz- and CPT-breaking
standard-model extension is used to derive an expression for the parameter for
CPT violation. It varies in a prescribed way with the magnitude and orientation
of the meson momentum and consequently also with sidereal time. Decay
probabilities are presented for both uncorrelated and correlated mesons, and
some implications for experiments are discussed.


title:
Transport Coefficients in Large $N_f$ Gauge Theory: Testing Hard Thermal
  Loops

abstract:
  We compute shear viscosity and flavor diffusion coefficients for
ultra-relativistic gauge theory with many fermionic species, Nf >> 1, to
leading order in 1/Nf. The calculation is performed both at leading order in
the effective coupling strength g^2 Nf, using the Hard Thermal Loop (HTL)
approximation, and completely to all orders in g^2 Nf. This constitutes a
nontrivial test of how well the HTL approximation works. We find that in this
context, the HTL approximation works well wherever the renormalization point
sensitivity of the leading order HTL result is small.


title:
Supersymmetric Model Contributions to $B^0_d$--$\bar B^0_d$ Mixing and
  $B\to\pi\pi,\rho\gamma$ Decays

abstract:
  Recent results from Belle and BaBar Collaborations hint at a small
$\sin2\phi_1$, while the measured $B\to\pi\pi$ rate also seems to be on the low
side. Supersymmetric (SUSY) models with down squark mixings can account for the
deficits in both cases. By studying the origin of SUSY contributions that could
impact on $B^0_d$--$\bar B^0_d$ mixing and $B\to\pi\pi$ decay, we find that the
former would most likely arise from left-left or right-right squark mixings,
while the latter would come from left-right squark mixings. These two processes
in general are not much correlated in the Minimum Supersymmetric Standard
Model. If the smallness of $B\to\pi\pi$ is due to SUSY models, one would likely
have large $B\to\rho\gamma$ from chiral enhancement, and the rate could be
within present experimental reach. Even if $B\to\rho\gamma$ is not greatly
enhanced, it could have large mixing dependent CP violation.


title:
Majorana Neutrinos and Same-Sign Dilepton Production at LHC and in Rare
  Meson Decays

abstract:
  We discuss same-sign dilepton production mediated by Majorana neutrinos in
high-energy proton-proton collisions $pp\ra \ell^+ \ell^{\prime +}X$ for
$\ell,~ \ell^\prime = e,~ \mu,~ \tau$ at the LHC energy $\sqrt{s}=14$ TeV, and
in the rare decays of $K$, $D$, $D_s$, and $B$ mesons of the type $M^{+}\ra
M^{\prime -}\ell ^{+}\ell ^{\prime+}$. For the $pp$ reaction, assuming one
heavy Majorana neutrino of mass $m_N$, we present discovery limits in the
$(m_{N},|U_{\ell N}U_{\ell^\prime N}|)$ plane where $U_{\ell N}$ are the mixing
parameters. Taking into account the present limits from low energy experiments,
we show that at LHC for the nominal luminosity L=100 fb$^{-1}$ there is no room
for observable same-sign dilepton signals. However, increasing the integrated
luminosity by a factor 30, one will have sensitivity to heavy Majorana
neutrinos up to a mass $m_N\leq 1.5$ TeV only in the dilepton channels $\mu\mu$
and $\mu \tau$, but other dilepton states will not be detectable due to the
already existing strong constraints. We work out a large number of rare meson
decays, both for the light and heavy Majorana neutrino scenarios, and argue
that the present experimental bounds on the branching ratios are too weak to
set reasonable limits on the effective Majorana masses.


title:
Obtaining the nuclear gluon distribution from heavy quark decays to
  lepton pairs in p$A$ collisions

abstract:
  We have studied how lepton pairs from decays of heavy-flavoured mesons
produced in p$A$ collisions can be used to determine the modifications of the
gluon distribution in the nucleus. Since heavy quark production is dominated by
the $gg$ channel, the ratio of correlated lepton pair cross sections from
$D\bar D$ and $B\bar B$ decays in p$A$ and pp collisions directly reflects the
ratio $R_g^A \equiv f_g^A/f_g^p$. We have numerically calculated the lepton
pair cross sections from these decays in pp and p$A$ collisions at SPS, RHIC
and LHC energies. We find that ratio of the p$A$ to pp cross sections agrees
quite well with the input $R_g^A.$ Thus, sufficiently accurate measurements
could be used to determine the nuclear modification of the gluon distribution
over a greater range of $x$ and $Q^2$ than presently available, putting strong
constraints on models.


title:
Purely perturbative Boltzmann equation for hot non-Abelian gauge
  theories

abstract:
  In the perturbation theory, trasnport phenomena in hot non-Abelian gauge
theories like QCD are often plagued with infrared singularities or
nonperturbative effects. We show, in the context of the Kadanoff & Baym
formalism, that there are certain nonequilibrium processes which are free from
such difficulties. For these processes, due to an interplay between the
macroscopic and microscopic physics, characteristic time scale (the mesoscale)
naturally enters as an infrared cutoff and purely perturbative description by
the Boltzmann equation is valid.


title: Charming Penguins Strike Back

abstract:
  By using the recent experimental measurements of B to pi pi and B to K pi
branching ratios, we find that factorization is unable to reproduce the
observed BRs even taking into account the uncertainties of the input
parameters. Charming and GIM penguins allow to reconcile the theoretical
predictions with the data. Because of these large effects, we conclude,
however, that it is not possible, with the present theoretical and experimental
accuracy, to determine the CP violation angle gamma from these decays. Contrary
to factorization, we predict large asymmetries for several of the
particle-antiparticle BRs, in particular BR(B^+ to K^+ pi^0), BR(B_d to K^+
pi^-) and BR(B_d to pi^+ pi^-). This opens new perspectives for the study of CP
violation in B systems.


title:
One-loop leading logarithms in electroweak radiative corrections: II.
  Factorization of collinear singularities

abstract:
  We discuss the evaluation of the collinear single-logarithmic contributions
to virtual electroweak corrections at high energies. More precisely, we proof
the factorization of the mass singularities originating from loop diagrams
involving collinear virtual gauge bosons coupled to external legs. We discuss,
in particular, processes involving external longitudinal gauge bosons, which
are treated using the Goldstone-boson equivalence theorem. The proof of
factorization is performed within the 't Hooft--Feynman gauge at one-loop order
and applies to arbitrary electroweak processes that are not mass-suppressed at
high energies. As basic ingredient we use Ward identities for Green functions
with arbitrary external particles involving a gauge boson collinear to one of
these. The Ward identities are derived from the BRS invariance of the
spontaneously broken electroweak gauge theory.


title: Chirality Violation in the QCD High-Energy S-Matrix

abstract:
  In a previous paper it has been shown that the infra-red divergence
associated with the triangle graph axial anomaly can occur in triple-regge
multi-reggeon interactions due to unphysical asymptotic triple discontinuities.
In this paper an asymptotic discontinuity analysis is applied to high-order
feynman diagrams to show that the anomaly exists in contributions to the
triple-regge nine-reggeon interaction. This implies that the anomaly occurs in
the interactions of reggeon states that have the quantum numbers of the anomaly
current and establishes a direct connection with the well-known U(1) problem.


title: Neutrino Oscillations via the Bulk

abstract:
  We investigate the possibility that the large mixing of neutrinos is induced
by their large coupling to a five-dimensional bulk neutrino. In the strong
coupling limit the model is exactly soluble. It gives rise to an oscillation
amplitude whose squared-mass difference is independent of the channel, thus
making it impossible to explain both the solar and the atmospheric neutrino
oscillations simultaneously.


title: A Note on Regularization methods in Kaluza-Klein Theories

abstract:
  We comment on the presence of power-like divergences in Kaluza-Klein theories
with supersymmetry breaking a l\`a Scherk-Schwarz. By introducing a SUSY
preserving regulator, we show that, in the context of a recently model proposed
by Barbieri, Hall and Nomura, the Higgs mass is finite and unambiguously
defined. The same result applies to similar models.


title: Renormalization of the neutrino mass matrix

abstract:
  The renormalization group equations for the general 2 by 2, complex, neutrino
mass matrix are shown to have exact, analytic solutions. Simple formulas are
given for the physical mixing angle, complex phase and mass ratio in terms of
their initial values and the energy scales. We also establish a (complex)
renormalization invariant relating these parameters. The qualitative features
of the physical parameters' renormalization are clearly illustrated in vector
field plots. In both the SM and MSSM, maximal mixing is a saddle point.


title: Strangeness and QGP freeze-out dynamics

abstract:
  We compare chemical and thermal analysis of the SPS Pb--Pb results at $158A$
GeV, and present a first chemical analysis of RHIC results. We show how a
combined analysis of several strange hadron resonances can be used in a study
of freeze-out dynamics.


title: Models of realistic Reggeons for t=0 high energy scattering

abstract:
  Several Regge-phenomenological models of forward scattering at high energies
are considered. It was found that one of them corresponds to the form of finite
series in log s with additional terms that represent the exchanges of
non-degenerate Regge-trajectories. These trajectories are unique for both the
scattering and resonance regions and satisfy the most realistic ideas on them.


title:
Hard Photon production from unsaturated quark gluon plasma at two loop
  level

abstract:
  The hard photon productions from bremsstrahlung and annihilation with
scattering that arise at two loop level are estimated from a chemically
non-equilibrated quark gluon plasma using the frame work of thermal field
theory. Although, the rate of photon production is suppressed due to
unsaturated phase space, the above suppression is relatively smaller than
expected due to an additional collinear enhancement (arise due to decrease in
thermal quark mass) as compared to it's equilibrium counterpart. Interestingly,
unlike the one loop case, the reduction in the two loop processes are found to
be independent of gluon chemical poential, but strongly depends on quark
fugacity. It is also found that, since the phase space suppression is highest
for annihilation with scattering, the photon production is entirely dominated
by bremsstrahlung mechanism at all energies. This is to be contrasted with the
case of the equilibrated plasma where annihilation with scattering dominates
the photon production particularly at higher energies.


title: On Casimir scaling in QCD

abstract:
  Recent lattice calculations have confirmed that QCD static potential for
sources in different representations of the gauge group is proportional to
eigenvalue of the corresponding quadratic Casimir operator with an accuracy of
a few percents. We review the present theoretical status of the "Casimir
scaling" phenomenon and stress its importance for analysis of nonperturbative
QCD vacuum models and other field theories. It is argued that Casimir scaling
strongly advocates the property of Gaussian dominance and we propose different
lattice tests to improve our understanding of these phenomena.


title: B^0-\bar{B}^0 mixing from lattice QCD

abstract:
  We report on lattice calculations of the $B$ meson decay constant and the
B-parameters using the NRQCD action for heavy quark. We performed a set of
calculations at three lattice spacings in the quenched approximation in order
to investigate the systematic uncertainty associated with the lattice
discretization. Our results indicate that the systematic error is under good
control for f_B and B_B. We also present preliminary results from our
unquenched simulation.


title: CP violation from noncommutative geometry

abstract:
  If the geometry of space-time is $\nc$, i.e. $[x_{\mu},x_{\nu}]=i \theta_{\mu
\nu}$, then $\nc$ $\cpviolng$ effects may be manifest at low energies. For a
$\nc$ scale $\Lambda \equiv \theta^{-1/2} \leq 2 TeV$, $\cpviol$ from $\ncg$ is
comparable to that from the Standard Model (SM) alone: the $\nc$ contributions
to $\epsilon$ and $\epsilon'/\epsilon$ in the $K$-system, may actually dominate
over the Standard Model contributions. Present data permit $\ncg$ to be the
only source of $\cpviol$. Furthermore the most recent findings for g-2 of the
muon are consistent with predictions from $\ncg$. If the geometry of space-time
is $\nc$, $i.e.$ $[x_{\mu},x_{\nu}]=i \theta_{\mu \nu}$, then $\nc$ $\cpviolng$
effects may be manifest at low energies. For a $\nc$ scale $\Lambda \equiv
\theta^{-1/2} \leq 2 TeV$, $\cpviol$ from $\ncg$ is comparable to that from the
Standard Model (SM) alone: the $\nc$ contributions to $\epsilon$ and
$\epsilon'/\epsilon$ in the K-system, may actually dominate over the Standard
Model contributions. Present data permit $\ncg$ to be the only source of
$\cpviol$. Furthermore the most recent findings for g-2 of the muon are
consistent with predictions from $\ncg$.


title: RHIC: From dreams to beams in two decades

abstract:
  This talk traces the history of RHIC over the last two decades, reviewing the
scientific motivations underlying its design, and the challenges and
opportunities the machine presents.


title: Spectral Change of Hadrons and Chiral Symmetry

abstract:
  After a brief summary of the QCD phase structure with light quarks, we
discuss two recent developments on in-medium hadrons. First topic is the
sigma-meson which is a fluctuation of the chiral order parameter \bar{q}q.
Although sigma is at best a broad resonance in the vacuum, it may suffer a
substantial red-shift and show a characteristic spectral enhancement at the 2
m_{pi} threshold at finite temperature and baryon density. Possible
experimental signatures of this phenomenon are also discussed. Another topic is
the first principle lattice QCD calculation of the hadronic spectral functions
using the maximum entropy method (MEM). The basic idea and a successful example
of MEM are presented. Possible applications of MEM to study the in-medium
hadrons in lattice QCD simulations are discussed.


title: Axino as a sterile neutrino

abstract:
  We present a supersymmetric axion model in which the fermionic superpartner
of axion, i.e. the axino, corresponds to a sterile neutrino which would
accommodate the LSND data with atmospheric and solar neutrino oscillations.


title: Muon Anomalous $g -2$ and Gauged $L_\mu - L_\tau$ Models

abstract:
  In this paper we study $Z'$ contribution to $g -2$ of the muon anomalous
magnetic dipole moment in gauged $U(1)_{L_\mu - L_\tau}$ models. Here $L_i$ are
the lepton numbers. We find that there are three classes of models which can
produce a large value of $g-2$ to account for possible discrepancy between the
experimental data and the Standard Model prediction. The three classes are: a)
Models with an exact $U(1)_{L_\mu - L_\tau}$. In these models, $Z'$ is
massless. The new gauge interaction coupling $e a/\cos\theta_W$ is constrained
to be $ 0.8\times 10^{-3} < |a| < 2.24\times 10^{-3}$. b) Models with broken
$U(1)_{L_\mu - L_\tau}$ and the breaking scale is not related to electroweak
symmetry breaking scale. The $Z'$ gauge boson is massive. The allowed range of
the coupling and the $Z'$ mass are constrained, but $Z'$ mass can be large; And
c) The $U(1)_{L_\mu-L_\tau}$ is broken and the breaking scale is related to the
electroweak scale. In this case the $Z'$ mass is constrained to be $\sim 1.2$
GeV. We find that there are interesting experimental signatures in
$\mu^+\mu^-\to \mu^+\mu^-, \tau^+\tau^-$ in these models.


title:
Explicit expressions for Euclidean and Minkowskian QCD observables in
  analytic perturbation theory

abstract:
  Technical aspects of the Shirkov-Solovtsov's analytic perturbation theory
(APT) are considered. We construct explicitly two sets of specific functions,
${\mathfrak{A}_n(s)}$ and ${{\cal A}_n(Q^2)}$ that determine the nonpower as
ymptotic expansions for Minkowskian and Euclidean QCD observables in APT. The
results, up to third order, are written in terms of the Lambert W-functions. As
an input we used the exact two loop and the three loop (corresponding to Pad\'e
transformed be ta-function) RG solutions for common invariant coupling
$\alpha_s$. In addition, the exact three-loop coupling is expanded in powers of
the exact two-loop solution. The excellent accuracy is achieved with few terms
of this series. We derive order by order elegant systems of equations for both
sets of the functions. Then we construct the global versions of the APT
functions with quark thresholds in the $\bar{MS}$ scheme and give numerical
results.


title: Unitarity constraints on the stabilized Randall-Sundrum scenario

abstract:
  Recently proposed stabilization mechanism of the Randall-Sundrum metric gives
rise to a scalar radion, which couples universally to matter with a weak
interaction ($\simeq 1$ TeV) scale. Demanding that gauge boson scattering as
described by the effective low enerrgy theory be unitary upto a given scale
leads to significant constraints on the mass of such a radion.


title:
Charged Higgs boson in the next-to-minimal supersymmetric standard model
  with explicit CP violation

abstract:
  The phenomenology of the explicit CP violation in the Higgs sector of the
next-to-minimal supersymmetric standard model (NMSSM) is investigated, with
emphasis on the charged Higgs boson. The radiative corrections due to both
quarks and scalar-quarks of the third generation are taken into account, and
the negative result of the search for the Higgs bosons at CERN LEP2, with the
discovery limit of 0.1 pb, is imposed as a constraint. It is found that there
are parameter regions of the NMSSM where the lightest neutral Higgs boson may
even be massless, without being detected at LEP2. This implies that the LEP2
data do not contradict the existence of a massless neutral Higgs boson in the
NMSSM. For the charged Higgs boson, the radiative corrections to its mass may
be negative in some parameter regions of the NMSSM. The phenomenological lower
bound on the radiatively corrected mass of the charged Higgs boson is increased
as the CP violation becomes maximal, i.e., as the CP violating phase becomes
$\pi/2$. At the maximal CP violation, its lower bound is about 110 GeV for 5
$\leqslant \tan \beta \leqslant$ 40. The vacuum expectation value (VEV) of the
neutral Higgs singlet is shown to be no smaller than 16 GeV for any parameter
values of the NMSSM with explicit CP violation. This value of the lower limit
is found to increase up to about 45 GeV as the ratio ($\tan \beta$) of the VEVs
of the two Higgs doublets decreases to smaller values ($\sim$ 2). The discovery
limit of the Higgs boson search at LEP2 is found to cover about a half of the
kinematically allowed part of the whole parameter space of the NMSSM, and the
portion is roughly stable against the CP violating phase.


title: SOFTSUSY: a program for calculating supersymmetric spectra

abstract:
  SOFTSUSY is a program which accurately calculates the spectrum of
superparticles in the CP-conserving Minimal Supersymmetric Standard Model
(MSSM), with a full flavour mixing structure. The program solves the
renormalisation group equations with theoretical constraints on soft
supersymmetry breaking terms provided by the user. Weak-scale gauge coupling
and fermion mass data (including one-loop finite MSSM corrections) are used as
a boundary condition, as well as successful radiative electroweak symmetry
breaking. The program can also calculate a measure of fine-tuning. The program
structure has been designed to easily generalise to extensions of the MSSM.
This article serves as a self-contained guide to prospective users, and
indicates the conventions and approximations used.


title:
Muon anomalous magnetic moment, lepton flavor violation, and flavor
  changing neutral current processes in SUSY GUT with right-handed neutrino

abstract:
  Motivated by the large mixing angle solutions for the atmospheric and solar
neutrino anomalies, flavor changing neutral current processes and lepton flavor
violating processes as well as the muon anomalous magnetic moment are analyzed
in the framework of SU(5) SUSY GUT with right-handed neutrino. In order to
explain realistic mass relations for quarks and leptons, we take into account
effects of higher dimensional operators above the GUT scale. It is shown that
the supersymmetric (SUSY) contributions to the CP violation parameter in
$K^0-\bar{K}^0$ mixing, $\epsilon_K$, the $\mu \to e \gamma$ branching ratio,
and the muon anomalous magnetic moment become large in a wide range of
parameter space. We also investigate correlations among these quantities.
Within the current experimental bound of $\text{B}(\mu \to e \gamma)$, large
SUSY contributions are possible either in the muon anomalous magnetic moment or
in $\epsilon_K$. In the former case, the favorable value of the recent muon
anomalous magnetic moment measurement at the BNL E821 experiment can be
accommodated. In the latter case, the allowed region of the Kobayashi-Maskawa
phase can be different from the prediction within the Standard Model (SM) and
therefore the measurements of the CP asymmetry of $B\to J/\psi K_S$ mode and
$\Delta m_{B_s}$ could discriminate this case from the SM. We also show that
the $\tau \to \mu \gamma$ branching ratio can be close to the current
experimental upperbound and the mixing induced CP asymmetry of the radiative B
decay can be enhanced in the case where the neutrino parameters correspond to
the Mikheyev-Smirnov-Wolfenstein small mixing angle solution.


title: Neutrino Mass, Mixing, and Oscillation

abstract:
  Do neutrinos have nonzero masses? If they do, then these masses are very
tiny, and can be sought only in very sensitive experiments. The most sensitive
of these search for neutrino oscillation, a quantum interference effect which
requires neutrino mass and leptonic mixing. In these lectures, we explain what
leptonic mixing is, and then develop the physics of neutrino oscillation,
including the general formalism and its application to special cases of
practical interest. We also see how neutrino oscillation is affected by the
passage of the oscillating neutrinos through matter.


title: Energy and Momentum of Oscillating Neutrinos

abstract:
  It is shown that Lorentz invariance implies that in general flavor neutrinos
in oscillation experiments are superpositions of massive neutrinos with
different energies and different momenta. It is also shown that for each
process in which neutrinos are produced there is either a Lorentz frame in
which all massive neutrinos have the same energy or a Lorentz frame in which
all massive neutrinos have the same momentum. In the case of neutrinos produced
in two-body decay processes, there is a Lorentz frame in which all massive
neutrinos have the same energy.


title: Phenomenology of Anti-de-Sitter Conformal Field Theory Duality

abstract:
  By use of the AdS/CFT correspondence on orbifolds, models are derived which
can contain the standard model of particle phenomenology. It will be assumed
that the theory becomes conformally invariant at a renormalization-group
fixed-point in the TeV region.


title:
Trilinear gauge boson couplings and bilepton production in the SU(3)_C X
  SU(3)_L X U(1)_N models

abstract:
  The trilinear gauge boson couplings in the SU(3)_C X SU(3)_L X U(1)_N (3 - 3
- 1) models are presented. We find that new $Z_2$ does not interact with the
usual (in the standard model) gauge bosons $Z, W^\pm$. Based on these results,
production of new heavy gauge bosons at high energy colliders such as e^+ e^-
is calculated. We show that the cross sections obtained in the 3 - 3 - 1 model
with right-handed neutrinos can be one order bigger than the same in the
minimal 3 - 3 - 1 model.


title:
The Muon Anomalous Magnetic Moment from a Generic Charged Higgs with
  SUSY

abstract:
  We study the contribution of a generic charged Higgs $(H^+)$ to the muon
anomalous magnetic moment $a_{\mu}$ with the SUSY soft breaking parameters. We
find out that the deviation between the experimental data and the predicted SM
value on $a_{\mu}$ can be explained by the two-loop charged Higgs diagrams even
with $m_{H^+}\sim 400 GeV$.


title: Large and infinite extra dimensions

abstract:
  The emphasis in the developmet of theories with more than three spatial
dimensions has recently shifted towards ``brane world'' picture, which assumes
that ordinary matter (with possible exceptions of gravitons and other,
hypothetic, particles which interact very weakly with matter) is trapped to a
three-dimensional submanifold --- brane --- embedded in fundamental
multi-dimensional space. In the brane world scenario, extra dimensions may be
large, and even infinite; they may have effects, directly observable in current
or fothcoming experiments. On the basis of simple field-theoretic models,
various ideas in this direction are exposed at a non-expert level.


title: QCD Aspects of Exclusive B Decays

abstract:
  Exclusive B decays can be factorized as convolutions of hard scattering
amplitudes involving the weak interaction with universal hadron distribution
amplitudes, thus providing a new QCD-based phenomenology. In addition,
semi-leptonic decay amplitudes can be computed exactly in terms of the diagonal
and off-diagonal overlap of hadronic light-cone wavefunctions. I review these
formalisms and the essential QCD ingredients. canonical form of the light-cone
wavefunctions, valid at low values of the transverse momenta, is presented. The
existence of intrinsic charm Fock states in the B meson wavefunction can
enhance the production of final states of B -decay with three charmed quarks,
such as B --> J/psi D pi, as well as lead to the breakdown of the CKM
hierarchy.


title:
Revealing the black-body regime of small-x deep-inelastic scattering
  through final-state signals

abstract:
  We derive the major characteristics of inclusive and diffractive final states
in deep-inelastic scattering off heavy nuclei for the-high energy (small-x)
kinematics in which the limit of complete absorption is reached for the
dominant hadronic fluctuations in the virtual photon (the black-body limit of
the process). Both the longitudinal and transverse distributions of the leading
hadrons are found to be strikingly different from the corresponding ones within
the leading-twist approximation, and hence provide unambiguous signals for the
onset of the black-body limit.


title: The color dipole approach to the Drell-Yan process in pA collisions

abstract:
  In the target rest frame and at high energies, Drell-Yan (DY) dilepton
production looks like bremsstrahlung of massive photons, rather than parton
annihilation. The projectile quark is decomposed into a series of Fock states.
Configurations with fixed transverse separations are interaction eigenstates
for pp scattering. The DY cross section can then be expressed in terms of the
same color dipole cross section as DIS. This approach is especially suitable to
describe nuclear effects, since it allows to apply Glauber multiple scattering
theory. We go beyond the Glauber eikonal approximation by taking into account
transitions between interaction eigenstates. We calculate nuclear shadowing at
large Feynman-x_F for DY in proton-nucleus collisions, compare to existing data
from E772 and make predictions for RHIC. Nuclear effects on the transverse
momentum distribution are also investigated.


title: SUSY CP violations in K and B systems

abstract:
  I report our recent works on the effects of % flavor conserving CP violating
phases in SUSY models on B and K phenomenology.


title: Extracting Weak Phase Information from B -> V_1 V_2 Decays

abstract:
  We describe a new method for extracting weak, CP-violating phase information,
with no hadronic uncertainties, from an angular analysis of B -> V_1 V_2
decays, where V_1 and V_2 are vector mesons. The quantity $\sin^2 (2 \phi_1 +
\phi_3)$ (\phi_1=\beta and \phi_3=\gamma) can be cleanly obtained from the
study of decays such as B_d^0(t) -> D^{*\pm} \rho^\mp, D^{*\pm} a_1^{\mp},
D^{*0} K^{*0}, etc. Similarly, one can use B_s^0(t) -> D_s^{*\pm} K^{*\mp} or
even B\pm -> D^{*0}K^*\pm to extract $\sin^2 \phi_3$. There are no penguin
contributions to these decays. It is possible that $\sin^2 (2\phi_1 + \phi_3)$
will be the second function of CP phases, after $\sin 2\phi_1$, to be measured
at B-factories.


title: Extra dimensions and the strong CP problem

abstract:
  In higher-dimensional theories such as Brane World models with
quasi-localized non-Abelian gauge fields the vacuum structure turns out to be
trivial. Since the gauge theory behaves at large distances as a
$4+\delta$-dimensional and thus the topology of the infinity is that of of
$S^{3+\delta}$ rather than $S^{3}$, the set of gauge mappings are homotopically
trivial and the CP-violating $\theta$-term vanishes on the brane world-volume.
As well there are no contributions to the $\theta$-term from the
higher-dimensional solitonic configurations. In this way, the strong CP problem
is absent in the models with quasi-localized gluons.


title: Probing new physics in rare charm processes

abstract:
  We explore the sensitivity of the flavour changing neutral currents among c
and u quarks in the context of the Minimal Supersymmetric Standard Model. The
standard model rate for c->u gamma can be enhanced by up to two orders of
magnitudes in general MSSM, while the c->ul^+l^- rate can be enhanced by at
most a factor of three. The most suitable hadronic observable to probe the c->u
gamma transition is the decay B_c->B_u^* gamma or the difference in decay rates
of D^0->rho^0 gamma and D^0->omega gamma, since they are relatively free of the
long distance contributions. The c ->ul^+l^- transition may be probed in D ->pi
l^+l^- decays at high high di-lepton mass and we predict the long distance
contributions for these modes.


title:
Electroweak Domain Wall by Hawking Radiation: Baryogenesis and Dark
  Matter from Several Hundred kg Black Holes

abstract:
  We show that a spherical electroweak domain wall is formed around a small
black hole and this is a general property of the Hawking radiation in the
vacuum of the Standard Model. The wall appears not only for the first order
phase transition in the electroweak theory but also for the second order one
because the black hole heats up its neighborhood locally by the Hawking
radiation in any case. We propose a model for unifying the origin of the baryon
number and the cold dark matter in our universe by using properties of the
primordial black hole with a mass of several hundred kilograms. The interaction
between our wall and the Hawking-radiated-particles can create a baryon number
which is proportional to the mass of the black hole as well as the CP broken
phase in the extension of the Standard Model. Our model can explain both the
baryon-entropy ratio B/S \sim 10^{-10} and the energy density of the dark
matter, provided that the following three conditions are satisfied: (i) the
primordial black holes dominate in the early universe, (ii) the CP broken phase
in the wall is in the order of one and (iii) any black hole leaves a stable
remnant with a Planck mass after its evaporation. Our model also predicts a
cosmological graviton background with a peak-energy 120 \sim 280 eV in the
present universe.


title:
Standard Model Higgs Boson Mass from Borderline Metastability of the
  Vacuum

abstract:
  We have studied imposing the condition that the Standard Model effective
Higgs potential should have two approximately degenerate vacua, such that the
vacuum we live in is just barely metastable: the one in which we live has a
vacuum expectation value of 246 GeV and the other one should have a vacuum
expectation value of order the Planck scale. Alone borderline metastability
gives, using the experimental top quark mass 173.1 \pm 4.6 GeV, the Higgs mass
prediction 121.8 \pm 11 GeV. The requirement that the second minimum be at the
Planck scale already gave the prediction 173\pm 4 GeV for the top quark mass
according to our 1995 paper.


title: QCD analysis of D-parameter in near-to-planar three-jet events

abstract:
  We present the QCD analysis of D-parameter distribution in near-to-planar
3-jet e+e- annihilation events. We derive the all-order resummed perturbative
prediction and the leading power suppressed non-perturbative corrections both
to the mean value and the distribution. Here non-perturbative corrections are
larger than in 2-jet shape observables, so that higher order non-perturbative
effects could be relevant. Experimental data (not yet available) are needed in
order to cast light on this important point. The technique we develop aims at
improving the accuracy of the theoretical description of multi-jet ensembles,
in particular in hadron-hadron collisions.


title:
Current mass dependence of the quark condensate and the constituent
  quark mass

abstract:
  We discuss the current mass dependence of the basic quantities of the quark
models -- constituent quark mass M and quark condensate i<psi^dagger psi >. The
framework of the consideration is QCD instanton vacuum model.


title:
Gauge invariant decomposition of 1-loop multiparticle scattering
  amplitudes

abstract:
  A simple algorithm is presented to decompose any 1-loop amplitude for
scattering processes of the class 2 fermions -> 4 fermions into a fixed number
of gauge-invariant form factors. The structure of the amplitude is simpler than
in the conventional approaches and its numerical evaluation is made faster. The
algorithm can be efficiently applied also to amplitudes with several thousands
of Feynman diagrams.


title:
Hint for axial-vector contact interactions in the data on e+e- ->
  e+e-(gamma) at centre-of-mass energies 192-208 GeV

abstract:
  For the first time the experiments ALEPH, DELPHI, L3 and OPAL have presented
preliminary results for fermion-pair production in e+e- collisions on the full
data set above the Z pole. A combined analysis of the Bhabha scattering
measurements is performed to search for effects of contact interactions. In the
case of two axial-vector (AA) currents the best fit to the data is 2.6 standard
deviations away from the Standard Model expectation, corresponding to an energy
scale $\Lambda = 10.3^{+2.8}_{-1.6}$ TeV for contact interactions. For other
models no statistically significant deviations are observed, and the data are
used to set lower limits at 95 % confidence level on the contact interaction
scales ranging from 8.2 to 21.3 TeV, depending on the helicity structure.


title: Piecing the Solar Neutrino Puzzle Together at SNO

abstract:
  We perform an oscillation parameter-independent analysis of solar neutrino
flux measurements from which we predict the charged-current rate at SNO
relative to Standard Solar Model to be $R_{SNO}^{CC}=0.35^{+0.16}_{-0.09}
(0.46^{+0.13}_{-0.11})$ for oscillations to active (sterile) neutrinos. By
alternately considering the $^8$B flux normalization fixed and free, we find
that the flux measured by Super-Kamiokande (SK) not being a result of
oscillations is strongly disfavored for oscillations to active neutrinos. SNO
will determine the best-fit value of the $^8$B flux normalization $\beta$
(equal to the neutral-current rate), without recourse to neutral-current
measurements, from the derived relation $\beta=R_{SNO}^{NC}=5.85 R_{SK} - 4.85
R_{SNO}^{CC}$. Using a simple parameterization of the fraction of high,
intermediate, and low energy solar neutrinos starting above resonance, we
reproduce the results of global analyses to good accuracy; we find that the LMA
solution with a normal mass hierarchy is clearly favored. With $\beta$ free,
our analysis for oscillations to active neutrinos gives
$R_{SNO}^{NC}=\beta=1.34 \pm 0.34$, which corresponds to $R_{SNO}^{CC}=0.28\pm
0.07$.


title: Nonequilibrium Temperature for Open Boson and Fermion Systems

abstract:
  The effective theory of an open boson or fermion system is studied, which
evolves out of equilibrium with time-dependent Hamiltonian $\hat{H}(t)$. A
measure of nonequilibrium temperature for the open system evolving from an
equilibrium is proposed as the time-averaged energy expectation value $T(t) =
T_i(\bar{< \hat{H} (t) >_{\Psi}}/ \bar{< \hat{I} (t) >_{\Psi}})$, where
$\hat{I} (t)$, the action operator, satisfies the quantum Liouville-von Neumann
equation and determines the true density operator. It recovers the result for
the adiabatic (quasi-equilibrium) and nonadiabatic (out of equilibrium)
evolution from one static Hamiltonian to another and takes into account the
particle production due to the intermediate processes.


title: Small x physics and the initial conditions in heavy ion collisions

abstract:
  At very high energies, the high parton densities (characterized by a
semi-hard saturation scale \Lambda_s) ensure that parton distributions can be
described by a classical effective field theory with remarkable properties
analogous to those of spin glass systems. This color glass condensate (CGC) of
gluons also provides the initial conditions for multi-particle production in
high energy nuclear collisions. In this talk, we briefly summarize recent
theoretical and phenomenological progress in the CGC approach to small x
physics. In particular, we discuss recent numerical work on the real time
gluodynamics of partons after a nuclear collision. The implications of this
work for the theoretical study of thermalization in nuclear collisions and on
the phenomenological interpretation of results of the recent RHIC experiments
are also discussed.


title: Supersymmetric Correction to Top Quark Pair Production near Threshold

abstract:
  We studied the leading supersymmetric contribution to top-antitop threshold
production using the NRQCD framework. The one-loop matching to the potential
and the Wilson coefficient of the leading production current were considered.
We point out that the leading correction to the potential is zero due to
SU(3)_c gauge invariance. This is true in general for any new physics that
enters above the electroweak scale. The shape of the top quark pair production
cross section is therefore almost unaffected near threshold, allowing a precise
determination of the top quark mass based on the Standard Model calculations.
The supersymmetric correction to the Wilson coefficient c_1 of the production
current decouples for heavy super particles. Its contribution is smaller than
the Standard Model next-to-next-leading-log results.


title: Resonance in the seesaw mechanism

abstract:
  We study the RH neutrino properties from the low energy neutrino data in the
seesaw mechanism. Reonance behavior is found for the right-handed (RH) mixing
angle as a function of light neutrino mass ratios in two favored region of the
solar neutrino problem and, at the resonance point, the two corresponding RH
Majorana neutrino masses are degenerate. This phenomenon is similar with that
in the matter-enhanced conversion of neutrinos. The physical significance it
infers for the electron neutrino mass and other neutrino parameters is
discussed.


title:
Phenomenological analysis of properties of the RH Majorana neutrino in
  the seesaw mechanism

abstract:
  As an extension of our previous work in the seesaw mechanism, we analyze the
influence of $U_{e3}$ on the properties (masses and mixing) of the RH Majorana
neutrinos in three flavors. The quasidegenerate light neutrinos case is also
considered. Assuming the hierarchical Dirac neutrino masses, we find the heavy
Majorana neutrino mass spectrum is either hierarchical or partial degenerate if
$\theta_{23}^{\nu}$ is large. We show that degenerate RH Majorana masses
correspond to maximal RH mixing angle while hierarchical ones correspond to the
RH mixing angles which scale linearly with the mass ratios of the Dirac
neutrino masses. An interesting analogue with the behavior of the
matter-enhanced neutrino conversion is also presented.


title: Radiative leptonic B decays in the instantaneous Bethe-Salpeter approach

abstract:
  Rare radiative leptonic decay $B\to l\bar \nu_l \gamma$ is studied in the
instantaneous Bethe-Salpeter approach. The results are compared to other
relativistic quark model predictions.


title:
Hadronic Production of Doubly Charmed Baryons via Charm Exitation in
  Proton

abstract:
  The production of baryons containing two charmed quarks Xi_cc in hadronic
interactions at high energies and large transverse momenta is considered. It is
supposed, that Xi_cc-baryon is formed during a non-perturbative fragmentation
of the (cc)-diquark, which was produced in the hard process of $c$-quark
scattering from the colliding protons: c+c -> (cc) +g. It is shown that such
mechanism enhances the expected doubly charmed baryon production cross section
on Tevatron and LHC colliders approximately 2 times in contrast to predictions,
obtained in the model of gluon - gluon production of (cc)-diquarks in the
leading order of perturbative QCD.


title:
g-2 of the muon in SUSY Models with Gauge Multiplets in the Bulk of
  Extra-Dimensions

abstract:
  We analyze the supersymmetric contributions to the anomalous magnetic moment
of the muon (a_\mu) in the framework of pure and gaugino-assisted anomaly
mediation models, and gaugino mediation models. In the last two models the
gauge multiplets propagate in the higher dimensional bulk, providing a natural
mechanism for solving the problem of negative squared slepton masses present in
the pure anomaly mediation models. In the light of the new BNL results for
a_\mu, we found that the pure and gaugino-assisted anomaly mediation models are
almost excluded by the BNL constraints at 2\sigma level when combined with CLEO
constraints on b->sg at 90 % of C.L. In contrast, the gaugino mediation models
provide extensive regions in the SUSY parameter space where both of these
constraints are satisfied.


title:
Twist Four Longitudinal Structure Function for a Positronium-like Bound
  State in Light-Front QED

abstract:
  To have an analytic understanding of the higher-twist structure functions, we
calculate twist four longitudinal structure function for a positronium-like
bound state in weak coupling light-front QED. We find that in the weakly
coupled system, the fermionic part of $F_L$ is related to the kinetic energy of
the fermions and not to the interaction. We verify a previously proposed sum
rule in this limit, which in this case reduces to a relation connecting the
kinetic and the potential energies to the binding energy of positronium. Using
the analytic form of the wave function of positronium in this limit, we show
that the constituent counting rule does not hold for $x \to 1$. The twist four
$F_L$ in this limit is similar in form to a widely used phenomenological
ansatz.


title: Positivity bounds on spin-one distribution and fragmentation functions

abstract:
  We establish a connection between the distribution functions of quarks in
spin-one hadrons and the helicity matrix for forward scattering of antiquarks
off spin-one hadrons. From positivity of this matrix we obtain inequality
relations among the distribution functions. Analogous relations hold also for
fragmentation functions. The bounds we obtained can be used to constrain
estimates of unknown functions, occurring in particular in semi-inclusive deep
inelastic scattering or e+ e- annihilation with vector mesons in the final
state.


title:
Probing QCD-instanton induced effects in deep inelastic scattering at
  HERA

abstract:
  After a brief introduction into the phenomenology of instantons, results from
instanton perturbation theory applied to deep-inelastic electron proton
scattering are summarized. Based on event signatures derived from Monte Carlo
studies, strategies for enhancing instanton induced events relative to Standard
Model deep-inelastic events are developed. Preliminary results for a search for
such events performed with the H1 detector at HERA are given.


title: One-loop QCD corrections to gluon-gluon scattering at NNLO

abstract:
  We present the O(alphas^4) virtual QCD corrections to gluon-gluon scattering
due to the self-interference of the one-loop amplitude. We give analytic
expressions renormalised in the MSbar scheme and work in conventional
dimensional regularisation. We write the structure of the infrared divergences
from direct Feynman diagram evaluation in terms of the Catani formalism for
infrared divergences. Formulae for the finite remainder are given in terms of
logarithms that are real in the physical region. These results, together with
those previously obtained for quark-quark and quark-gluon scattering complete
the one-loop matrix elements for 2 to 2 processes needed for the
next-to-next-to-leading order contribution to inclusive jet production at
hadron colliders.


title:
Can the charged Higgs boson be discovered in $e\gamma$ collisions using
  the channel $e^-\gamma\to\nu H^-$?

abstract:
  We consider the single production of charged Higgs bosons $H^\pm$ of the
two-Higgs-doublet model in $e\gamma$ collisions through the production
subprocess $e^-\gamma\to\nu H^-$.
  As the production rate is governed by the size of the loop-induced $H^\pm
W^\mp\gamma$ coupling, the cross section can only be substantial for smaller
values of $\tan\beta$, $\tan\beta\lesssim1$, where the top-bottom loop
contribution is enhanced.
  In this case, however, the natural width of the charged Higgs boson becomes
large so that the Standard Model continuum background becomes important. We
study the background subprocess $e^-\gamma\to\nu\bar t b$ including the
interference with the signal, and find that in the region of charged Higgs mass
that can be interesting, the signal is difficult to detect.


title:
Heavy charged Higgs boson production at next generation $e^\pm\gamma$
  colliders

abstract:
  We assess the potential of future electron-positron linear colliders
operating in the $e^\pm\gamma$ mode in detecting charged Higgs bosons with mass
around and larger than the top quark mass, using Compton back-scattered photons
from laser light. We compare the pair production mode, $e^-\gamma\to e^-
H^+H^-$, to a variety of channels involving only one charged Higgs scalar in
the final state, such as the tree-level processes $e^-\gamma\to \nu_e H^-
\Phi^0 $ ($\Phi^0=h^0,H^0$ and $A^0$) and $e^-\gamma\to \nu_e f\bar f H^-$
($f=b,\tau$ and $\nu_\tau$) as well as the loop-induced channel $e^-\gamma\to
\nu_e H^-$. We show that, when the charged Higgs boson mass is smaller than or
comparable to half the collider energy, $\sqrt s_{ee}\gsim 2M_{H^\pm}$, single
production cross sections are of the same size as the pair production rate,
whereas, for charged Higgs boson masses larger than $\sqrt s_{ee}/2$, all
processes are heavily suppressed. In general, production cross sections of
charged Higgs bosons via $e^\pm\gamma$ scatterings are smaller than those
induced at an $e^+e^-$ collider and the latter represents a better option to
produce and analyse such particles.


title: Quark Mass Matrices from a Softly Broken U(1) Symmetry

abstract:
  Assigning U(1) charges to the quarks of the standard model, and allowing one
extra scalar doublet with m^2 > 0, the correct pattern of the up and down quark
mass matrices is obtained, together with their charged-current mixing matrix.


title:
Massive fields temper anomaly-induced inflation: the clue to graceful
  exit?

abstract:
  A method of calculating the vacuum effective action for massive quantum
fields in curved space-time is outlined. Our approach is based on the conformal
representation of the fields action and on the integration of the corresponding
conformal anomaly. As a relevant cosmological application, we find that if
taking the masses of the fields into account, then the anomaly-induced
inflation automatically slows down. The only relevant massive fields for this
purpose turn out to be the fermion fields. So in supersymmetric theories this
mechanism can be specially efficient, for it may naturally provide the graceful
exit from the inflationary to the FLRW phase. Taking the SUSY breaking into
account, the anomaly-induced inflation could be free of the well-known
difficulties with the initial data and also with the amplitude of the
gravitational waves.


title: Equation of State for Strange Quark Matter in a Separable Model

abstract:
  We present the thermodynamics of a nonlocal chiral quark model with separable
4-fermion interaction for the case of U(3) flavor symmetry within a functional
integral approach. The four free parameters of the model are fixed by the
chiral condensate, and by the pseudoscalar meson properties (pion mass, kaon
mass, pion decay constant). We discuss the T=0 equation of state (EoS) which
describes quark confinement (zero quark matter pressure) below the critical
chemical potential mu_c=333 MeV. The new result of the present approach is that
the strange quark deconfinement is separated from the light quark one and
occurs only at a higher chemical potential of mu_{c,s}=492 MeV. We compare the
resulting EoS to bag model ones for two and three quark flavors, which have the
phase transition to the vacuum with zero pressure also at mu_c. We study quark
matter stars in general relativity theory assuming beta-equilibrium with
electrons and show that for configurations with masses close to the maximum of
stability at M=1.62 ... 1.64 M_{solar} strange quark matter can occur.


title: Probing R-violating top quark decays at the NLC

abstract:
  We examine the possibility of observing exotic top quark decays via
$R$-Parity violating SUSY interactions in $e^+e^-$ collisions at $\sqrt{s = 500
GeV$. We present cross-sections for $t\bar t$ production followed by the
subsequent decay of either the $t$ or $\overline{t}$ via the $R$-Parity
violating interaction while the other undergoes the SM decay. We discuss
kinematic cuts that allow the exotic SUSY decays to be detected over standard
model backgrounds. Discovery limits for $R$-Parity violating couplings in the
top sector are presented assuming an integrated luminosity of $100 fb^{-1}$.


title: Muon Pair Production by Electron-Photon Scatterings

abstract:
  The cross section for muon pair productions by electrons scattering over
photons, $\sigma_{MPP}$, is calculated analytically in the leading order. It is
pointed out that for the center-of-mass energy range, $s \geq 5 m^{2}_{\mu}$,
the cross section for $\sigma_{MPP}$ is less than $1 \mu $b. The differential
energy spectrum for either of the resulting muons is given for the purpose of
high-energy neutrino astronomy. An implication of our result for a recent
suggestion concerning the high-energy cosmic neutrino generation through this
muon pair is discussed.


title: Affleck-Dine baryo/leptogenesis with a gauged U(1)(B-L)

abstract:
  We briefly review the present status of Affleck-Dine baryo/leptogenesis
scenarios in the minimal supersymmetric standard model (MSSM) in the context of
the gravity-mediated SUSY breaking, and show that there is a serious
cosmological problem in the Affleck-Dine mechanism. That is, the late decay of
the associated large Q-balls leads to the over production of the lightest
supersymmetric particles. Then, we point out that the minimal extension of the
MSSM by introducing a gauged $U(1)_{B-L}$ symmetry naturally solves this
problem. Here, the breaking scale of the $U(1)_{B-L}$ can be determined quite
independently of the reheating temperature from the required baryon asymmetry.
It is extremely interesting that the obtained scale of the $U(1)_{B-L}$
breaking is well consistent with the one suggested from the seesaw mechanism to
explain the recent neutrino-oscillation experiments. We consider that the
present scenario provides a new determination of the $U(1)_{B-L}$ breaking
scale fully independent of the neutrino masses. We also comment on viability of
the present scenario in anomaly-mediated SUSY breaking models.


title: The origin of quark and lepton mixings

abstract:
  We propose a model for the mass matrices of quarks and leptons based on two
Abelian flavor symmetries. One is assumed to be broken at a high energy region
near the Planck scale. It is used for the Froggatt-Nielsen mechanism in both
quark and charged lepton sectors. Another one remains unbroken to a multi-TeV
region. The mixings among neutrinos and gauginos including the one of the new
Abelian symmetry generate non-zero masses and mixings among neutrinos. A
bi-maximal scheme for the neutrino oscillation can be realized together with
suitable masses and CKM-mixings in the quark sector. FCNC constraints on this
flavor dependent Abelian symmetry seems to be evaded.


title: Deconfining by Winding

abstract:
  A model for the quantum effective description of the vacuum structure of
thermalized SU(3) Yang-Mills theory is proposed. The model is based on Abelian
projection leading to a Ginzburg-Landau theory for the magnetic sector. The
possibility of topologically non-trivial, effective monopole fields in the
deconfining phase is explored. These fields are assumed to be
Bogomol'nyi-Prasad-Sommerfield saturated solutions along the compact, euclidean
time dimension. Accordingly, a gauge invariant interaction for the monopole
fields is constructed.
  Motivated by the corresponding lattice results the vacuum dynamics is assumed
to be dominated by the monopole fields. A reasonable value for the critical
temperature is obtained, and the partial persistence of non-perturbative
features in the deconfining phase of SU(3) Yang-Mills theory, as it is measured
on the lattice, follows naturally.


title: Spectator processes and baryogenesis

abstract:
  Spectator processes which are in thermal equilibrium during the period of
baryogenesis influence the final baryon asymmetry. We study this effect
quantitatively for thermal leptogenesis where we find a suppression by a factor
O(1).


title: Three flavor neutrino oscillations, LSND, SNP and ANP

abstract:
  The recently reanalysed LSND data is investigated in the context of three
flavor oscillations, with an emphasis on mass hierarchies and $s_{13}$. The
resultant mass hierarchies and oscillation angles are tested with regard to
"key" features of solar neutrinos and atmospheric neutrinos, e.g., "average"
survival probability in the case of solar neutrinos, and zenith angle
dependence and up-down asymmetry in the case of high energy atmospheric
neutrinos. We find there are three distinct mass hierarchies, e.g.,
  $\Delta m << \Delta M, \Delta m < \Delta M$ and $\Delta m \simeq \Delta M$.
In the first and second case, the calculated range of $s_{13}$ is in agreement
with the "LMA" solution of Akhmedov {\it et al.}, the lower limit on $s_{13}$
in these cases is also in agreement with the recent analysis of Garcia {\it et
al.} based on the constraints of SNP, ANP and CHOOZ, therefore, strongly
supporting the neutrino oscillations observed at LSND. Further, the solutions
of $s_{13}$ found in the third case correspond to the value of $s_{13}$ found
by Akhmedov {\it et al.} in the case of "SMA" and "LOW" solutions. A rough
estimate of the possibility of the existence of CP violation in the leptonic
sector is also carried out for different possible ranges of $s_{13}$,
indicating that the CP asymmetries may be measureable even in the case of LSND.


title: Restriction on SUSY Masses from $Z\to hadrons$

abstract:
  We remark that the precision of recent determinations of $\alpha_s(M^2_Z)$ is
such that one can get bounds on supersymmetric partner masses (squark and
gluino) by requiring consistency of determinations of $\alpha_s$ at "low"
energies, where those particles do not contribute, and on the $Z$ peak. For
approximately degenerate squarks and gluinos with mass $\widetilde{m}$, we find
the bound $\widetilde{m}\geq 173$ GeV, at the $2\sigma$ level. At the
$2.5\sigma$ level, $\widetilde{m}\geq 121$ GeV.


title: Truncated BFKL Series in Electron-Proton Collisions

abstract:
  We study the contribution of the truncated BFKL series to the
electroproduction process showing that a reliable description is obtained
taking into account two orders in perturbation theory. Using the recent F2
logarithmic slope data as a constraint to the adustable parameters, the
inclusive structure function is described in a wide range of the small x HERA
kinematical region, consistent with the unitarity bound. We also extrapolate
the extimates to the THERA region.


title:
Low temperature relation for the trace of the energy-momentum tensor in
  QCD with light quarks

abstract:
  It is shown that the temperature derivatives of the anomalous and normal
(quark massive term) contributions to the trace of the energy-momentum tensor
in QCD are equal to each other in the low temperature region. The physical
consequences of this relation are discussed.


title:
Masses of the pseudo-Nambu-Goldstone bosons in two flavor color
  superconducting phase

abstract:
  The masses of the pseudo-Nambu-Goldstone bosons in the color superconducting
phase of dense QCD with two light flavors are estimated by making use of the
Cornwall-Jackiw-Tomboulis effective action. Parametrically, the masses of the
doublet and antidoublet bosons are suppressed by a power of the coupling
constant as compared to the value of the superconducting gap. This is
qualitatively different from the mass expression for the singlet
pseudo-Nambu-Goldstone boson, resulting from non-perturbative effects. It is
argued that the (anti-) doublet pseudo-Nambu-Goldstone bosons form colorless
[with respect to the unbroken SU(2)_{c}] charmonium-like bound states. The
corresponding binding energy is also estimated.


title: A note on brane cosmology

abstract:
  We derive a new class of time-dependent solutions for the Randall-Sundrum
model by patching together isometries broken by the brane. Solutions generated
by generalized boosts along the fifth dimension are associated with localized
gravity and lead to an effective Friedman equation on the brane with a scale
factor exhibiting power law or exponential behaviour. The effective
energy-density on the brane depends linearly on the brane tension.


title: Diffraction at HERA

abstract:
  Talk given at the First Workshop on Forward Physics and Luminosity
Determination at the LHC, Helsinki,
  Finland, November 2000. 12 pages, 9 figures


title:
Effective field theory and the quark model, II. Structure of loop
  corrections

abstract:
  We analyze the structure of meson loop corrections to the O($m_s$)
expressions for the baryon masses and magnetic moments in heavy-baryon chiral
perturbation theory (HBChPT), and show in detail how the bulk of the
corrections are absorbed into redefinitions of the unknown parameters of the
O($m_s$) chiral expansion. To effect this analysis, we use the
three-flavor-index representation of the effective baryon fields and HBChPT
developed in a preceding paper, and a decomposition of the corrections in terms
of effective one-, two-, and three-quark operators. The results show why the
loop corrections have so little effect on fits to the masses and moments, and
do not seriously disrupt the Gell-Mann--Okubo relations for the masses and the
Okubo relation for the moments even though individual loops can be quite large.
We also examine the momentum structure of the residual loop corrections, and
comment on limits on their validity in HBChPT. The structural analysis can be
generalized straightforwardly to other problems in HBChPT using the
three-flavor-index representation of the effective baryon fields, and provides
a fairly simple way to determine what parts of the loop corrections are
actually significant in a given setting.


title:
Exploring Skewed Parton Distributions with Two-body Models on the Light
  Front I: bimodality

abstract:
  We explore skewed parton distributions for simple, model wave-functions in a
truncated two-body Fock space. Consideration of non-Gaussian wave functions is
our main emphasis, from which we observe the distributions are bimodal (there
can be two distinct peaks) in the Fock-space diagonal overlap region (x > xi).
We demonstrate that this behavior arises from convoluting two light-front wave
functions to form the skewed parton distribution. Furthermore, the
factorization Ansaetze, which have been used often, are shown not to hold. At
high t, we can write the skewed parton distribution in terms of quark
distribution amplitudes and perturbative wave functions thereby providing new
tests.


title: Bulk Physics at a Graviton Factory

abstract:
  A general prediction of the 5-d Randall-Sundrum (RS) hierarchy model is the
emergence of spin-2 Kaluza Klein (KK) gravitons with weak scale masses and
couplings. The lowest order effective theory of the RS model is given by 5-d
Einstein gravity which uniquely fixes the self-interactions of gravitons. We
demonstrate that large numbers of light KK resonances could be produced at a
future lepton-collider-based ``Graviton Factory''. Measuring the
self-interactions of these KK gravitons will probe the accuracy of the 5-d
Einstein gravity picture and, in addition, yield indirect information on the as
yet untested self-coupling of the 4-d graviton. The self-interactions of the
gravitons can be studied by measuring the decays of the heavier states to the
lighter ones. Using the AdS/CFT picture, these can be interpretted as the
decays of heavier resonances to lighter ones, in a strongly coupled 4-d CFT. We
show that these decays have sufficient rates to be studied at future colliders
and that they are also, in principle, sensitive to higher derivative operators,
such as the Gauss-Bonnet term. In a generalized RS model, with non-universal
5-d fermion masses, FCNC's will be induced. We show that precise measurements
of the rare decays of KK graviton/gauge states into flavor non-diagonal final
states at a Graviton Factory can be used to map the 5-d fermion mass matrix.


title:
Neutrino masses, anomalous U(1) gauge symmetry and doublet-triplet
  splitting

abstract:
  We propose an attractive scenario of grand unified theories in which
doublet-triplet splitting is beautifully realized in SO(10) unification using
Dimopoulos-Wilczek mechanism. The anomalous U(1)_A gauge symmetry plays
essential roles in the doublet-triplet splitting mechanism. It is interesting
that the anomalous U(1)_A charges determine the unification scale and mass
spectrum of additional particles as well as the order of Yukawa couplings of
quarks and leptons. For the neutrino sector, bi-maximal mixing angles are
naturally obtained and proton decay via dimension 5 operators is suppressed. It
is suggestive that the anomalous U(1)_A gauge symmetry motivated by superstring
theory excellently solves the two biggest problems in grand unified theories,
fermion mass hierarchy problem and doublet-triplet splitting problem.


title: On e+e- --> W+W- --> 4f(+gamma) at LEP2

abstract:
  The results on e+e- --> W+W- --> 4f(+gamma) obtained by different groups are
compared with each other. Differences in the results for the total cross
section of up to about 0.6% are traced back to different ways of implementing
the double-pole approximation.


title: B -> K(K^*)X: Decay Distributions, Branching Ratios and CP Asymmetries

abstract:
  We discuss an improved theoretical description of the semi-inclusive B meson
decays $B\to K(K^*)X$. The decay distributions are calculated. Their branching
ratios are found to be appreciable. The CP asymmetries in the neutral B modes
$\bar{B^0}\to K^-(K^{*-})X$ are sizable. An observation of direct CP violation
and a measurement of $\gamma$ may come from these neutral B modes.


title:
Moments of the neutron charge form factor and the N->Delta quadrupole
  transition

abstract:
  Recent data allow a new parametrization of the neutron charge form factor
G_En. A parameter-free quark model relation between G_En and the N->Delta
quadrupole form factor is used to predict the latter from the G_En data. In
particular, the neutron charge radius is related to N->Delta quadrupole moment,
while the fourth moment of G_En connects to the N->Delta quadrupole transition
radius. From the latter we derive an experimental value for the charge radius
of the light constituent quarks. Finally, the C2/M1 ratio in pion
electroproduction is predicted from the elastic neutron form factor data.


title:
The (Sigma^0 Lambda) Transition Magnetic Moment in Light Cone QCD Sum
  Rules

abstract:
  Using the general form of the (Sigma^0) and (Lambda) currents, the
(Sigma^0-Lambda) transition magnetic moment is calculated in framework of the
light cone QCD sum rules. A comparison of our result on this quantity with the
existing theoretical results and experimental data is presented.


title:
High energy behaviour of gamma gamma to f f(bar) processes in SM and
  MSSM

abstract:
  We compute the leading logarithms electroweak contributions to gamma gamma to
f f(bar) processes in SM and MSSM. Several interesting properties are pointed
out, such as the importance of the angular dependent terms, of the Yukawa
terms, and especially of the $\tan^2\beta$ dependence in the SUSY
contributions. These properties are complementary to those found in e+e- to f
f(bar). These radiative correction effects should be largely observable at
future high energy gamma gamma colliders. Polarized beams would bring
interesting checks of the structure of the one loop corrections. We finally
discuss the need for two-loop calculations and resummation.


title: Model-independent approach as a tool of studying chiral symmetry

abstract:
  A simultaneous analysis (in the model-independent approach) of the $\pi\pi$
scattering (from the threshold to 1.9 GeV) and of the $\pi\pi\to K\overline{K}$
process (from the threshold to $\sim$ 1.46 GeV) is carried out in channel with
$I^GJ^{PC}=0^+0^{++}$. The existence of the $f_0(665)$ state with properies of
the $\sigma$-meson is proved. An indication for the glueball nature of the
$f_0(1500)$ is obtained. A minimum scenario of the simultaneous description of
the processes $\pi\pi\to\pi\pi,K\overline{K}$ does without the ${f_0}(1370)$
resonance. A version including this state is also considered. In this case the
${f_0}(1370)$ resonance has the dominant $s{\bar s}$ component (the ratio of
its coupling constant with the $\pi\pi$ channel to the one with the
$K\overline{K}$ channel is 0.12). The coupling constants of the observed states
with the $\pi\pi$ and $K\overline{K}$ systems and the $\pi\pi$ and
$K\overline{K}$ scattering lengths are obtained. A parameterless description of
the $\pi\pi$ background is given by allowance for the left-hand branch-point in
the uniformizing variable. On the basis of this and of the fact that all the
adjusted parameters for the $\pi\pi$ scattering are only the positions of poles
describing resonances, it is concluded that our model-independent approach is a
valuable tool for studying the realization schemes of chiral symmetry. The
existence of the $f_0(665)$ state and the obtained $\pi\pi$-scattering length
($a_0^0\approx 0.27 m_{\pi^+}^{-1}$) seem to suggest the linear realization of
chiral symmetry.


title: Longitudinal top quark polarization

abstract:
  Longitudinal polarization of the top quark, averaged over the production
angle, is discussed for the top quark produced in e+e- annihilation near its
production threshold. It is demonstrated that Coulomb type corrections and
rescattering corrections are important. They change considerably measurable
quantities and should be taken into account in phenomenological analysis.


title: Excited Heavy-Light Systems and Hadronic Transitions

abstract:
  A detailed study of orbital and radial excited states in D, Ds, B and B_s
systems is performed. The chiral quark model provides the framework for the
calculation of pseudoscalar meson (pi, K, ...) hadronic transitions among
heavy-light excited and ground states. To calculate the excited states masses
and wavefunctions, we must resort to a relativistic quark model. Our model
includes the leading order corrections in 1/m_(c,b) (e.g. mixing). Numerical
results for masses and light hadronic transition rates are compared to existing
experimental data. The effective coupling of the chiral quark model can be
determined by comparing with independent results from lattice simulations
(g^8_A = 0.53 +-/- 0.11) or fitting to known widths (g^8_A = 0.82 +-/- 0.09).


title:
Spontaneous Symmetry Breaking for Scalar QED with Non-minimal
  Chern-Simons Coupling

abstract:
  We investigate the two-loop effective potential for both minimally and
non-minimally coupled Maxwell-Chern-Simons theories. The non-minimal gauge
interaction represents the magnetic moment interaction between a charged scalar
and the electromagnetic field. In a previous paper we have shown that the two
loop effective potential for this model is renormalizable with an appropriate
choice of the non-minimal coupling constant. We carry out a detailed analysis
of the spontaneous symmetry breaking induced by radiative corrections. As long
as the renormalization point for all couplings is chosen to be the true minimum
of the effective potential, both models predict the presence of spontaneous
symmetry breaking. Two loop corrections are small compared to the one loop
result, and thus the symmetry breaking is perturbatively stable.


title:
Dynamical behavior of spatially inhomogeneous relativistic $\lambda
  \phi^4$ quantum field theory in the Hartree approximation

abstract:
  We study the dynamics of a spatially inhomogeneous quantum $\lambda \phi^4$
field theory in 1+1 dimensions in the Hartree approximation. In particular, we
investigate the long-time behavior of this approximation in a variety of
controlled situations, both at zero and finite temperature. The observed
behavior is much richer than that in the spatially homogeneous case.
Nevertheless, we show that the fields fail to thermalize in a canonical sense,
as expected from analogous results in closely related (mean field) transport
theory. We argue that this dynamical approximation is best suited as a means to
study the short-time decay of spatially inhomogeneous fields and in the
dynamics of coherent quasi-classical inhomogeneous configurations (e.g.
solitons) in a background of dynamical self-consistent quantum fluctuations.


title:
Prediction of $\sin^2\theta_W$ in a Conformal Approach to Coupling
  Unification

abstract:
  The possibility that non-supersymmetric conformal field theories softly
broken below 100 TeV may provide an alternative to conventional grand
unification is explored. We consider a low energy theory presumed to be of this
type arising from the Type IIB superstring compactified on a $AdS_5 \times
S_5/\Gamma$ space whose gauge group and the particle content are severely
restricted by the compactification process. We present an example of a
resulting $SU(4)_c\times SU(2)_L\times SU(2)_R$ with three generations, which
leads to coupling unification and a prediction for $sin^2\theta_W\simeq .227$
and other phenomenology generally consistent with observations.


title:
Vacuum Bubbles Nucleation and Dark Matter Production through Gauge
  Symmetry Rearrangement

abstract:
  Modern particle physics and cosmology support the idea that a background of
invisible material pervades the whole universe, and identify in the cosmic
vacuum the ultimate source of matter-energy, both seen and unseen. Within the
framework of the theory of fundamental relativistic membranes, we suggest a
self-consistent, vacuum energy-driven mechanism for dark matter creation
through gauge symmetry rearrangement.


title: Spectrality, coupling constant analyticity and the renormalization group

abstract:
  Analytic structure in the strong coupling constant that emerges for some
observables in QCD after duality averaging of renormalization group improved
amplitudes is discussed. It is shown that perturbation theory calculations are
justified for the proper observables related to the two-point correlators of
hadronic currents the analytic properties of which are well-established. A
particular case of gluonic current correlators is discussed in detail.


title: Inflationary magnetogenesis from dynamical gauge couplings

abstract:
  The evolution of the gauge coupling is modelled using a scalar degree of
freedom whose homogeneous and inhomogeneous modes evolve from an ordinary
inflationary phase to the subsequent epochs. Depending upon various parameters
(scalar mass, curvature scale at the end of inflation and at the onset of the
radiation epoch), the two-point function of the magnetic inhomogeneities grows
during the de Sitter stage of expansion and, consequently, large scale magnetic
fields are generated. The requirements coming from inflationary magnetogenesis
are examined together with the theoretical constraints stemming from the
explicit model of the evolution of the gauge coupling. Galactic magnetogenesis
is possible for a wide range of parameters. Inter-galactic and inter-cluster
magnetogenesis are also discussed.


title: Nonconservation of global quantum numbers in RSbar-type models

abstract:
  In Randall-Sundrum type scenarios the effective size of the extra dimension
remains unconstrained. A TeV-scale brane tension without orbifold boundary
conditions would allow phenomenologically observable processes at high energy
colliders. Among others, the brane could fragment into bubbles that fly away
for good or return within a time <O(1 mm)/c. Particles trapped on the bubbles
may fake nonconservation of global or electric charges.
  In this letter we explore the generic (model independent) features of these
bubbles. We describe the brane dynamics by a scalar field coupled derivatively
to the energy momentum tensor by dimension-8 operators. Mass is generated to
this field by any brane stabilization mechanism. The bubbles may be stabilized
by the Casimir effect. When the threshold energy of sqrt{s}~brane tension > TeV
is reached, bubbles with 1/TeV size are copiously produced. At lower sqrt{s},
smaller bubbles can be produced (if they exist) with strongly suppressed
probability.


title: Charge Fluctuations at Disoriented Chiral Transition

abstract:
  The signatures of the creation of a disoriented chiral condensate in
heavy-ion collisions are studied in the Ginzburg-Landau description of chiral
phase transition. Scaling properties are found that characterize the
fluctuations of charged particles. There exists also an explicitly calculable
measure that can directly be measured. Experimental procedures needed to find
the signatures are discussed.


title:
Characteristic Wino Signals in a Linear Collider from Anomaly Mediated
  Supersymmetry Breaking

abstract:
  Though the minimal model of anomaly mediated supersymmetry breaking has been
significantly constrained by recent experimental and theoretical work, there
are still allowed regions of the parameter space for moderate to large values
of $\tan\beta$. We show that these regions will be comprehensively probed in a
${\sqrt s} =1$ TeV $e^+e^-$ linear collider. Diagnostic signals to this end are
studied by zeroing in on a unique and distinct feature of a large class of
models in this genre: a neutral winolike Lightest Supersymmetric Particle
closely degenerate in mass with a winolike chargino. The pair production
processes $e^+e^- \to {\tilde e}_L^\pm {\tilde e}_L^\mp$, ${\tilde e}_R^\pm
{\tilde e}_R^\mp$, ${\tilde e}_L^\pm {\tilde e}_R^\mp$, ${\tilde \nu} {\bar
{\tilde \nu}}$, $\widetilde \chi^0_1 \widetilde \chi^0_2$, $\widetilde \chi^0_2
\widetilde \chi^0_2$ are all considered at $\sqrt s = 1$ TeV corresponding to
the proposed TESLA linear collider in two natural categories of mass ordering
in the sparticle spectra. The signals analysed comprise multiple combinations
of fast charged leptons (any of which can act as the trigger) plus displaced
vertices $X_D$ (any of which can be identified by a heavy ionizing track
terminating in the detector) and/or associated soft pions with characteristic
momentum distributions.


title:
Majorana Neutrinos, Neutrino Mass Spectrum, CP-Violation and
  Neutrinoless Double Beta-Decay: II. Mixing of Four Neutrinos

abstract:
  Assuming four-neutrino mixing and massive Majorana neutrinos, we study the
implications of the neutrino oscillation solutions of the solar and atmospheric
neutrino problems, of the results of the LSND experiment and of the constraints
on neutrino oscillations, obtained in reactor and accelerator experiments, for
the predictions of the effective Majorana mass in neutrinoless double beta
(\betabeta-)decay, \meff. All 4-neutrino mass spectra compatible with the
existing neutrino mass and oscillation data are considered. The general case of
CP-nonconservation is investigated. We have also analyzed in detail the
question of whether a measurement of $\meff \gtap 0.01$ eV in the next
generation of \betabeta-decay experiments (NEMO3, CUORE, EXO, GENIUS), combined
with the data from the solar, atmospheric, reactor and accelerator neutrino
oscillation experiments and from the future neutrino mass $^3$H $\beta-$decay
experiment KATRIN would allow, and under what conditions, i) to determine the
absolute values of the neutrino masses and thus the neutrino mass spectrum, and
ii) to establish the existence of CP-violation in the lepton sector. For
certain 4-neutrino mass spectra there exists a direct relation between \meff or
the lightest neutrino mass $m_1$ and the neutrino mass measured in $^3$H
$\beta-$decay, $m_{\nu_e}$, and the measurement of $\meff \gtap 0.01$ eV and of
$m_{\nu_e} \gtap 0.4$ eV will give the unique possibility to determine the
absolute values of all four neutrino masses and to obtain information on
CP-violation in the lepton sector.


title:
Markov-Yukawa Transversality On Covariant Null-Plane: Baryon Form Factor
  And Magnetic Moments

abstract:
  The baryon-$qqq$ vertex function governed by the Markov-Yukawa Transversality
Principle ($MYTP$), is formulated via the Covariant Null-Plane Ansatz ($CNPA$)
as a 3-body generalization of the corresponding $q{\bar q}$ problem, and
employed to calculate the proton e.m. form factor and baryon octet magnetic
moments.The e.m. coupling scheme is specified by letting the e.m. field
interact by turn with the `spectator' while the two interacting quarks fold
back into the baryon. The $S_3$ symmetry of the matrix element is preserved in
all d.o.f.'s together. The $CNPA$ formulation ensures, as in the $q{\bar q}$
case, that the loop integral is free from the Lorentz mismatch disease of
covariant instantaneity ($CIA$), while the simple trick of `Lorentz
completion'ensures a Lorentz invariant structure. The $k^{-4}$ scaling
behaviour at large $k^2$ is reproduced. And with the infrared structure of the
gluonic propagator attuned to spectroscopy, the charge radius of the proton
comes out at $0.96 fm$. The magnetic moments of the baryon octet, also in good
accord with data, are expressible as $(a+b\lambda)/(2+\lambda)$, where $a,b$
are purely geometrical numbers and $\lambda$ a dynamics-dependent quantity.
  PACS: 11.10.St ; 12.90.+b ; 13.40.Fn Key Words : Baryon-$qqq$ Vertex;
Markov-Yukawa Principle (MYTP); 3D-4D Interlinkage; Covariant null-plane
(CNPA); e.m.form factor;baryon magneton.


title:
Prospects of Very Long Base-Line Neutrino Oscillation Experiments with
  the JAERI-KEK High Intensity Proton Accelerator

abstract:
  In this paper, we discuss physics potential of the Very Long Base-Line (VLBL)
Neutrino-Oscillation Experiments with the High Intensity Proton Accelerator
(HIPA), which is planned to be built by 2006 in Tokaimura, Japan.
  We propose to use conventional narrow-band \nu_\mu beams (NBB) from HIPA for
observing the \nu_\mu \to \nu_e transition probability and the \nu_\mu survival
probability.
  The pulsed NBB allows us to obtain useful information through counting
experiments at a huge water-Cherenkov detector which may be placed in our
neighbor countries.
  We study sensitivity of such an experiment to the neutrino mass hierarchy,
the mass-squared differences, the mixing angles and the CP phase of the 3\times
3 lepton flavor mixing matrix (MNS matrix).
  The CP phase can be measured with a 100kt detector if both the mass-squared
difference and U_{e3} elements of the MNS matrix are sufficiently large.


title:
Atmospheric, Solar, and CHOOZ neutrinos: a global three generation
  analysis

abstract:
  We perform a global three generation analysis of the current solar and
atmospheric evidence in favor of neutrino oscillations. We also include the
negative results coming from CHOOZ to constrain the nu_e mixing. We study the
zones of mass-mixing oscillations parameters compatible with all the data. It
is shown that almost pure nu_mu <--> nu_tau oscillations are required to
explain the atmospheric neutrino anomaly and almost pure nu_1 <--> nu_2
oscillations to account for the solar neutrino deficit.


title:
Spinor algebra transformations as gauge symmetry: limit to Einstein
  gravity

abstract:
  We construct a Lagrangian of Weyl spinors and gauge fields, which is
invariant under the action of equivalent local transformations on the spinor
algebra representations. A model of vacuum with a nontrivial gauge
strength-tensor setting a scale and spontaneously breaking the gauge symmetry
is suggested, so that the leading approximation at low energies is described by
the Einstein--Hilbert Lagrangian of gravity. We consider a mechanism for the
cancellation of cosmological constant due to a symmetry between the vacuum
strength tensor and the tensor dual to it. The appearance of nonzero masses for
the non-graviton degrees of freedom for the gauge field is shown. The
generalization to the Dirac spinors is considered, and a group of additional
gauge symmetry is determined. We argue for a necessary introduction of
supersymmetry.


title: Electroweak properties of baryons in a covariant chiral quark model

abstract:
  The proton and neutron electromagnetic form factors and the nucleon axial
form factor have been calculated in the Goldstone-boson exchange
constituent-quark model within the point-form approach to relativistic quantum
mechanics. The results, obtained without any adjustable parameter nor quark
form factors, are, due to the dramatic effects of the boost required by the
covariant treatment, in striking agreement with the data.


title: Standard Model Higgs search at LEP in channels other than four jets

abstract:
  The LEP centre of mass energy has been increased since 1996 in the aim of
producing the Higgs boson. The SM Higgs boson search has been pursued in the
four LEP collaborations exploiting final states with higher branching ratios.
In the following we discuss the search in final states with two jets and
missing energy or charged leptons.


title: Two-loop Barr-Zee type Contributions to $(g-2)_\mu$ in the MSSM

abstract:
  We consider the contribution of a two-loop Barr-Zee type diagram to
$(g-2)_\mu$ in the minimal supersymmetric standard model (MSSM). At relatively
large $\tan\beta$, we show that the contribution of light third generation
scalar fermions and neutral CP-even Higgs, $h^0(H^0)$, can easily explain the
very recent BNL experimental data. In our analysis $(g-2)_\mu$ prefers negative
$A_{f}$ and positive $\mu$. It is more sensitive to the chirality flipping
$h^0(H^0)\wt{f}_R^*\wt{f}_L$ rather than chirality conserving couplings.


title: Can the Zee Model Explain the Observed Neutrino Data?

abstract:
  The eigenvalues and mixing angles in the Zee model are investigated
parameter-independently. When we require |\Delta m^2_{12}/\Delta m^2_{23}| \ll
1 in order to understand the solar and atmospheric data simultaneously, the
only solution is one which gives bi-maximal mixing. It is pointed out that the
observed values \sin^2 2\theta_{solar} \simeq 0.66 in the MSW LMA solution
cannot be explained within the framework of the Zee model, because we derive a
severe constraint on the value of \sin^2 2 \theta_{solar}, \sin^2 2
\theta_{solar} \geq 1 -(1/16)(\Delta m^2_{solar}/\Delta m^2_{atm})^2.


title: Topics in Lorentz and CPT Violation

abstract:
  This talk outlines some recent theoretical developments in Lorentz and CPT
violation.


title: Leptogenesis in left-right symmetric theories

abstract:
  The masses and mixing of the light left-handed neutrinos can be related to
those of the heavy right-handed neutrinos in left-right symmetric theories.
Properties of the light neutrinos are measured in terrestrial experiments and
the CP-violating decays of their heavy counterparts produce a baryon asymmetry
via the well-known leptogenesis mechanism. The left-handed Higgs triplet,
present in left-right symmetric theories, modifies the usual see-saw formula.
It is possible to relate the lepton asymmetry to the light neutrino parameters
when the triplet and the top quark through the usual see-saw mechanism give
dominant contribution to the neutrino mass matrix. We find that in this
situation the small angle MSW and vacuum solutions produce reasonable
asymmetry, whereas the large angle MSW case requires extreme fine-tuning of the
three phases in the mixing matrix.


title: Towards a phase diagram of the 2D Skyrme model

abstract:
  We discuss calculations of the phase diagram of the baby-Skyrme model, a
two-dimensional version of the model that has been so successful in the
description of baryons. Contact is made with the sine Gordon model in 1D, and
relations with the Skyrme model used in the quantum-Hall effect are pointed
out. It is shown that at finite temperature the phase diagram is dominated by a
liquid, and not the crystal that plays a role for zero temperature.


title: High p_T Higgs signal for the LHC

abstract:
  We show that the broad transverse momentum distribution of the Higgs boson
produced by WW fusion can provide a viable way to identify H --> b anti-b
decays at the LHC, if particular kinematical configurations with large rapidity
gaps are selected. We estimate the event rate of the signal and of the QCD b
anti-b background. We also discuss Higgs boson detection via the H --> tau tau
and H --> WW* decay modes.


title: On fermionic vacuum energy

abstract:
  We quantitatively compute the rate and spectrum of spontaneous photon
emissions, caused by the vacuum decaying when an external magnetic field is
introduced. The spectrum of spontaneous photon emissions shows the
energy-momentum-dependency in the low-energy region and in the high energy
region, is respectively similar to the Rayleigh-Jeans part and the Wien part of
the spectrum of the black-body radiation. However, the energy-momentum of
spontaneous photon emissions is quantized, analogous to the Wigner spectrum.
This provides quantitative results for experimental testes.


title: Electroweak radiative corrections in high energy processes

abstract:
  Experiments at future colliders will attempt to unveil the origin of
electroweak symmetry breaking in the TeV range. At these energies the Standard
Model (SM) predictions have to be known precisely in order to disentangle
various viable scenarios such as supersymmetry and its manifestations. In
particular, large logarithmic corrections of the scale ratio $\sqrt{s}/M$,
where $M$ denotes the gauge boson masses, contribute significantly up to and
including the two loop level.
  In this paper we review recent progress in the theoretical understanding of
the electroweak Sudakov corrections at high energies up to subleading accuracy
in the SM and the minimal supersymmetric SM (MSSM). We discuss the symmetric
part of the SM Lagrangian at high energies yielding the effective theory
employed in the framework of the infrared evolution equation (IREE) method.
Applications are presented for important SM and MSSM processes relevant for the
physics program of future linear colliders including higher order purely
electroweak angular dependent corrections.
  The size of the higher order subleading electroweak corrections is found to
change cross sections in the several percent regime at TeV energies and their
inclusion is thus mandatory for predictions of high energy processes at future
colliders.


title: Compact Hyperbolic Manifolds as Internal Worlds

abstract:
  We comment briefly on some of the advantages and disadvantages of compact
hyperbolic manifolds as candidate manifolds for large radii compactifications.


title: A proposal on the possibility of detecting D-particles

abstract:
  In a previous study we showed that D0-branes (particles) can operate as
sources of very-high-energy radiation, as a result of an unstable spacetime
distortion that follows a D0-particle/closed string state scattering. The
effect can happen only if the energy of the incident particle/closed string
state exceeds a certain threshold, which is of order of the subsequently
radiated energy. In this letter we speculate on the possibility of detection of
the D-particles due to this phenomenon. The energies of the emitted radiation
range in a narrow window of size less than one order of magnitude.
Observation-wise, this radiation will appear as an excess of photons in a
narrow band in the spectrum of high energy cosmic rays. From their energy we
can then read off the value of the product of the string mass scale times the
string coupling. We speculate on the possibility that high energy neutrinos
from GRB's play the r\^ole of the necessary high energy flux that triggers the
effect, by striking D-particles lying inside the mean free path of the photons
as measured from Earth. The possibilty of this effect operating as a mechanism
of GZK cutoff violation is also pointed out.


title: Direct photons and thermal dileptons: A theoretical review

abstract:
  We discuss the measurement of electromagnetic radiation produced in heavy ion
collisions at SPS energies. We review the low invariant mass dilepton sector,
the real photon data, and the spectra of intermediate mass dimuons. Along with
this, we discuss the theoretical interpretations of those observables.


title: The Rare Decay D^0 -> gamma gamma

abstract:
  We present a calculation of the rare decay mode D^0 -> gamma gamma, in which
the long distance contributions are expected to be dominant. Using the Heavy
Quark Chiral Perturbation Theory Lagrangian with a strong g coupling as
recently determined by CLEO from the D^* -> D pi width, we consider both the
anomaly contribution which relates to the annihilation part of the weak
Lagrangian and the one-loop pi, K diagrams. The loop contributions which are
proportional to g and contain the a_1 Wilson coefficient are found to dominate
the decay amplitude, which turns out to be mainly parity violating. The
branching ratio is then calculated to be (1.0+-0.5)x10^(-8). Observation of an
order of magnitude larger branching ratio could be indicative of new physics.


title: Integration of GRACE and PYTHIA

abstract:
  We have successfully developed a technique to integrate an automatic
event-generator generation system GRACE and a general-purpose event generator
framework PYTHIA. The codes generated by GRACE are embedded in PYTHIA in the
created event generator program. The embedded codes give information on
parton-level hard interactions directly to PYTHIA. The choice of PDF is
controlled by the ordinary parameter setting in PYTHIA. This technique enables
us to create easy-to-handle event generators for any processes in hadron
collisions. Especially, in virtue of large capability of GRACE, we can easily
deal with those processes containing many (four or more) partons in the final
state, such as multiple heavy particle productions. This project is being
carried out as a collaboration between the Japanese Atlas group and the
Minami-Tateya group, aiming at developing event generators for Tevatron and LHC
experiments.


title:
Bounds on the Unitarity Triangle, $\sin 2\beta$ and $K\to\pi\nu\bar\nu$
  Decays in Models with Minimal Flavour Violation

abstract:
  We present a general discussion of the unitarity triangle from $\epsilon_K$,
$\Delta M_{d,s}$ and $K \to \pi\nu\overline{\nu}$ in models with minimal
flavour violation (MFV), allowing for arbitrary signs of the generalized
Inami--Lim functions $F_{tt}$ and $X$ relevant for $(\epsilon_K,\Delta
M_{d,s})$ and $K \to \pi\nu\overline{\nu}$, respectively. In the models in
which $F_{tt}$ has a sign opposite to the one in the Standard Model, i.e.
$F_{tt}<0$, the data for $(\epsilon_K, \Delta M_{d,s})$ imply an absolute lower
bound on the $B_d\to\psi K_{S}$ CP asymmetry $a_{\psi K_S}$ of 0.69, which is
substantially stronger than 0.42 arising in the case of $F_{tt}>0$. An
important finding of this paper is the observation that for given
$Br(K^+\to\pi^+\nu\overline{\nu})$ and $a_{\psi K_S}$ only two values for
$Br(K_{L}\to\pi^0\nu\overline{\nu})$, corresponding to the two signs of $X$,
are possible in the full class of MFV models, independently of any new
parameters arising in these models. This provides a powerful test for this
class of models. Moreover, we derive absolute lower and upper bounds on
$Br(K_{L}\to\pi^0\nu\overline{\nu})$ as functions of
$Br(K^+\to\pi^+\nu\overline{\nu})$. Using the present experimental upper bounds
on $Br(K^+\to\pi^+\nu\overline{\nu})$ and $|V_{ub}/V_{cb}|$, we obtain the
absolute upper bound $Br(K_{L}\to\pi^0\nu\overline{\nu})< 7.1 \cdot 10^{-10}$
(90% C.L.).


title: Long-wavelength excitations of Higgs condensates

abstract:
  Quite independently of the Goldstone phenomenon, recent lattice data suggest
the existence of gap-less modes in the spontaneously broken phase of a $\lambda
\Phi^4$ theory. This result is a direct consequence of the quantum nature of
the `Higgs condensate' that cannot be treated as a purely classical c-number
field.


title: Quintessence with two energy scales

abstract:
  We study quintessence models using low energy supergravity inspired from
string theory. We consider effective supergravity with two scales m_S, the
string scale, and m_PL, the Planck scale and show that quintessence naturally
arises from a supersymmetry breaking hidden sector. As long as supersymmetry is
broken by the $F$-term of a Polonyi-like field coupled to the quintessence
field in the K\"ahler potential we find that the Ratra-Peebles potential and
its supergravity version are generic predictions. This requires that the string
scale decouples from the Planck scale, m_S << m_PL. In the context of
supergravity, the potential possesses a minimum induced by the supergravity
corrections to the Ratra-Peebles potential at low redshifts. We study the
physical consequences of the presence of this minimum.


title: Enhancement of gluonic dissociation of $J/\psi$ in viscous QGP

abstract:
  We have investigated the effect of viscosity on the gluonic dissociation of
$J/\psi$ in an equilibrating plasma. Suppression of $J/\psi$ due to gluonic
dissociation depend on the temperature and also on the chemical equilibration
rate. In an equilibrating plasma, viscosity affects the temperature evolution
and also the chemical equilibration rate, requiring both of them to evolve
slowly compared to their ideal counter part. For Au+Au collisions at RHIC and
LHC energies, gluonic dissociation of $J/\psi$ increases for a viscous plasma.
Low $P_T$ $J/\psi$'s are found to be more suppressed due to viscosity than the
high $P_T$ ones. Also the effect is more at LHC energy than at RHIC energy.