title: MULTI-CHANNEL SEARCH FOR SUPERGRAVITY AT THE LARGE HADRON COLLIDER

abstract:
  The potential of seeing supersymmetry (SUSY) at the CERN Large Hadron
Collider (LHC) was studied by looking at 3 types of signals: dilepton events
from slepton pair productions, trilepton events from chargino/neutralino
productions and missing energy plus multi-jet events from gluino/squark
productions. I described my results by mapping out reachable areas in the
supergravity parameter space. Areas explorable at LEP II were also mapped out
for comparison.


title: The contribution of the J/psi resonance to the radiative B decays

abstract:
  The radiative decays of the B mesons may have a significant contribution from
the transition b -> s J/psi followed by the J/psi-photon conversion. The size
of this contribution is re-analysed in the light of a phenomenological model
for the weak bsJ/psi vertex, and a modified J/psi-photon interaction that is
manifestly gauge invariant. Predictions for both inclusive and exclusive cases
are obtained, but large uncertainties still remain.


title:
Inclusive hadronic production of the $B_c$ meson via heavy quark
  fragementation.

abstract:
  We summarize the studies on the hadronic production of S- and P-wave $(\bar
bc)$ mesons via direct fragmentation of the bottom antiquark as well as the
Altarelli-Parisi induced gluon fragmentation.


title: Approach to Parton Equilibration

abstract:
  Perturbative QCD-based models of parton production and equilibration in
ultrarelativistic heavy ion collisions are reviewed with an emphasis on the
treatment of quantum interference effects. Uncertainties in the initial parton
production and their effects on later parton equilibration are considered.
Probes of early parton dynamics are also discussed.


title: Remarks on the Value of the Higgs Mass from the Present LEP Data

abstract:
  We perform a detailed comparison of the present LEP data with the one-loop
standard-model predictions. It is pointed out that for $m_t= 174$ GeV the
``bulk'' of the data prefers a rather large value of the Higgs mass in the
range 500-1000 GeV, in agreement with the indications from the W mass. On the
other hand, to accommodate a light Higgs it is crucial to include the more
problematic data for the $\tau$ F-B asymmetry. We discuss further improvements
on the data taking required to obtain a firm conclusion.


title: How to Search for Doubly Charmed Baryons and Tetraquarks

abstract:
  Possible experimental searches of doubly charmed baryons and tetraquarks at
fixed target experiments with high energy hadron beams and a high intensity
spectrometer are considered here. The baryons considered are: $\Xi_{cc}^{+}$
(ccd), $\Xi_{cc}^{++}$ (ccu), and $\Omega_{cc}^{+}$ (ccs); and the tetraquark
is T ($cc\bar{u}\bar{d}$). Estimates are given of masses, lifetimes, internal
structure, production cross sections, decay modes, branching ratios, and
yields. Experimental requirements are given for optimizing the signal and
minimizing the backgrounds. The discussion is in the spirit of an experimental
and theoretical review, as part of the planning for a CHarm Experiment with
Omni-Purpose Setup (CHEOPS) at CERN. The CHEOPS objective is to achieve a
state-of-the-art very charming experiment, in the spirit of the aims of the
recent CHARM2000 workshop.


title: Single spin asymmetry for $p^{\uparrow}p \to \pi X$ in perturbative QCD

abstract:
  Within the QCD-improved parton model and assuming the factorization theorem
to hold in the helicity basis and for higher twist contributions, we show how
non zero single spin asymmetries in hadron-hadron high energy and moderately
large $p_T$ inclusive processes can be obtained, even in massless perturbative
QCD, provided the quark intrinsic motion is taken into account. A simple model
is constructed which reproduces the main features of the data on the single
spin asymmetry observed in inclusive pion production in $p\,p$ collisions.


title:
A Re-Evaluation of the nuclear Structure Function Ratios for D, He, Li,
  C and Ca

abstract:
  We present a re-evaluation of the structure function ratios F2(He)/F2(D),
F2(C)/F2(D) and F2(Ca)/F2(D) measured in deep inelastic muon-nucleus scattering
at an incident muon momentum of 200 GeV. We also present the ratios
F2(C)/F2(Li), F2(Ca)/F2(Li) and F2(Ca)/F2(C) measured at 90 GeV. The results
are based on data already published by NMC; the main difference in the analysis
is a correction for the masses of the deuterium targets and an improvement in
the radiative corrections. The kinematic range covered is 0.0035 < x < 0.65,
0.5 < Q^2 <90 GeV^2 for the He/D, C/D and Ca/D data and 0.0085 < x < 0.6, 0.84
< Q^2 < 17 GeV^2 for the Li/C/Ca ones.


title: Sources and Distributions of Dark Matter

abstract:
  In the first section, I will try to convey a sense of the variety of
observational inputs that tell us about the existence and the spatial
distribution of dark matter in the universe. In the second section, I will
briefly review the four main dark matter candidates, taking note of each
candidate's status in the world of particle physics, its production in the
early universe, its effect upon large scale structure formation and the means
by which it may be detected. Section 3 concerns the energy spectrum of (cold)
dark matter particles on earth as may be observed some day in a direct
detection experiment. It is a brief account of work done in collaboration with
J. Ipser and, more recently, with I. Tkachev and Y. Wang.


title: On a Light Spinless Particle Coupled to Photons

abstract:
  A pseudoscalar or scalar particle $\phi$ that couples to two photons but not
to leptons, quarks and nucleons would have effects in most of the experiments
searching for axions, since these are based on the $a \gamma \gamma $ coupling.
We examine the laboratory, astrophysical and cosmological constraints on $\phi$
and study whether it may constitute a substantial part of the dark matter. We
also generalize the $\phi$ interactions to possess $SU(2) \times U(1)$ gauge
invariance, and analyze the phenomenological implications.


title: Properties of the Scale Invariant $O(g^4)$ Lipatov Kernel

abstract:
  We study the scale-invariant $O(g^4)$ kernel which appears as an infra-red
contribution in the BFKL evolution equation and is constructed via
multiparticle $t$-channel unitarity. We detail the variety of Ward identity
constraints and infra-red cancellations that characterize its infrared
behaviour. We give an analytic form for the full non-forward kernel. For the
forward kernel controlling parton evolution at small-x, we give an impact
parameter representation, derive the eigenvalue spectrum, and demonstrate a
holomorphic factorisation property related to conformal invariance. The results
show that, at next-to-leading-order, the transverse momentum infra-red region
may produce a strong reduction of the BFKL small-x behavior.


title: Remarks on the KARMEN Anomaly

abstract:
  A recently reported anomaly in the time structure of signals in the KARMEN
neutrino detector suggests the decay of a new particle $x$, produced in $\pi^+
\to \mu^+ x$ with mass $m_x=33.9$ MeV. We discuss the constraints and
difficulties in interpreting $x$ as a neutrino. We show that a mainly-sterile
neutrino scenario is compatible with all laboratory constraints, within narrow
limits on the mixing parameters, although there are problems with astrophysical
and cosmological constraints. This scenario predicts that appreciable numbers
of other $x$-decay events with different origins and time structures should
also be observable in the KARMEN detector. Such $x$-decay events should also be
found in the LSND experiment and may be relevant to the search for
$\bar\nu_\mu\to\bar\nu_e$ oscillations.


title: Bubble Wall Velocity at the Electroweak Phase Transition

abstract:
  We calculate the velocity and thickness of a bubble wall at the electroweak
phase transition in the Minimal Standard Model. We model the wall with
semiclassical equations of motion and show that friction arises from the
deviation of massive particle populations from thermal equilibrium. We treat
these with Boltzmann equations in a fluid approximation in the background of
the wall. Our analysis improves on the previous work by using the two loop
effective potential, accounting for particle transport, and determining the
wall thickness dynamically. We find that the wall is significantly thicker than
at phase equilibrium, and that the velocity is fairly high, $v_w \simeq 0.7c$,
and quite weakly dependent on the Higgs mass.


title: GLUON RADIATION PATTERNS IN HARD SCATTERING EVENTS

abstract:
  The radiation pattern of relatively soft gluons in hard scattering events is
sensitive to the underlying color structure. As an example I consider heavy
Higgs production via weak boson fusion at the LHC. A minijet veto, which makes
use of the different patterns for signal and backgrounds, provides an effective
Higgs search tool. Talk presented at the Conference on Physics {\it Beyond the
Standard Model IV}, Lake Tahoe, California, December 14--18, 1994.


title: Some Recent Developments in Sphalerons

abstract:
  We review briefly the sphaleron and list some of its properties. We summarize
some of the results in models which have an extended scalar sector. We also
present our work on models dealing with physics beyond the standard model. We
focus on the energy of the sphaleron which is important in determining the rate
of baryon number violation at the electroweak scale.


title:
$K^+\to \pi^+\nu\overline\nu$ and $K^0_L\to\mu^+\mu^-$ Decays within the
  Minimal Supersymmetric Standard Model

abstract:
  We present a detailed calculation of the contributions of charginos, scalar
quarks, and charged Higgs boson to the $K^+\rightarrow \pi^+\nu\overline\nu$\
and $K^0_L\rightarrow\mu^+\mu^-$\ decays. We include mixings: that of charginos
and that of the scalar partners of the left and right handed top quark. We find
that the box contribution to the amplitudes is much smaller than the penguin
contribution, which can be $\sim$10\% of the Standard Model contribution, even
for relatively large SUSY masses. The charged Higgs contribution can be as
large as 25\% of the SM contribution in the first decay and as much as 40\% of
the SM contribution in the second decay.


title: SUPPRESSION OF THE NEUTRON-ANTINEUTRON OSCILLATION IN NUCLEI

abstract:
  The problem of nuclear decays occurring due to the neutron-antineutron
oscillation is analyzed in the optical potentil model and within the
field-theoretic S-matrix approach. The result of the optical potential model is
rederived within the field theoretic S-matrix approach. The neutron-
antineutron oscillation in nuclei is suppressed drastically. We discuss an
example for the spin precession of an atom in which analogous suppression takes
place due to transparent physical reasons.


title: THE SEARCH FOR SUPERSYMMETRY

abstract:
  The minimal supergravity model (SUGRA), with gauge coupling unification and
radiative electroweak symmetry breaking, is a well-motivated paradigm for
physics Beyond the Standard Model. In this talk, I review the capabilities of
various present and future collider experiments to make definitive tests of the
SUGRA model, including LEP and LEP II, the Tevatron and its upgrades, and
finally the CERN LHC project.


title: Recent Developments in supersymmetry Search Strategies

abstract:
  After a quick review of the framework for phenomenological analyses of
supersymmetry, we summarize current limits on supersymmetric particle masses
and discuss strategies for their searches at the Fermilab Tevatron and the LHC.
We also discuss the sense in which such searches as well as those that may be
carried out at LEP complement one another. Finally, we touch upon the prospects
for more ambitious measurements such as those of sparticle masses and
couplings. Such measurements could (a) help pin down model parameters, (b)
perhaps, serve to test our ideas of physics at very high energy, and (c)
provide the most direct test of supersymmetry.


title: Supersymmetry Breaking in the Early Universe

abstract:
  Supersymmetry breaking in the early universe induces scalar soft potentials
with curvature of order the Hubble constant. This has a dramatic effect on the
coherent production of scalar fields along flat directions. For the moduli
problem it generically gives a concrete realization of the problem by
determining the field value subsequent to inflation. However it might suggest a
solution if the minimum of the induced potential coincides with the true
minimum. The induced Hubble scale mass also has important implications for the
Affleck-Dine mechanism of baryogenesis. This mechanism requires large squark or
slepton expectation values to develop along flat directions in the early
universe. This is generally not the case if the induced mass squared is
positive, but does occur if it is negative. The resulting baryon to entropy
ratio depends mainly on the dimension of the nonrenormalizable operator in the
superpotential which stabilizes the flat direction, and the reheat temperature
after inflation. Unlike the original scenario, it is possible to obtain an
acceptable baryon asymmetry without subsequent entropy releases.


title: DIMENSIONAL REDUCTION AT HIGH TEMPERATURE FOR FERMIONS

abstract:
  The concept of dimensional reduction in the high temperature regime is
generalized to static Green's functions of composite operators that contain
fermionic fields. The recognition of a natural kinematic region where the
lowest Matsubara modes are close to their mass-shell, and the ultraviolet
behavior of the running coupling constant of the original theory are crucial
for providing the necessary scale hierarchy. The general strategy is
illustrated in the asymptotically-free Gross-Neveu model in 1+1 dimensions,
where we verify that dimensional reduction occurs to the leading order in
$g^2(T)$. We also find, in the same model, that the scale parameter
characterizing the dependence on temperature of the coupling constant in the
reduced theory, $\Lambda_T$, is considerably smaller than
$\Lambda_{\bar{\text{MS}}}$. Implications of our results for QCD are also
discussed.


title: Charmonium in a weakly coupled quark-gluon plasma

abstract:
  We present a model of charmonium as two heavy quarks propagating classically
in a weakly coupled quark-gluon plasma. The quarks interact via a static,
color-dependent potential and also suffer collisions with the plasma particles.
We calculate the radiation width of the color octet state (for fixed, classical
$q\bar q$ separation) and find that it is long-lived provided a finite gluon
mass is used to provide a threshold energy.


title:
Flavour Changing Neutral Current Effects From Flavour Dependent
  Supergravity Couplings

abstract:
  We investigate the impact on low energy flavour mixing phenomena of the
renormalisation group running of parameters in supersymmetric theories. We have
explicitly chosen flavour dependent supergravity couplings. The renormalisation
group equations are displayed in general matrix form. We work in a scale
dependent basis such that the hierarchy in the quark masses can be more easily
utilised. Simple analytic solutions are provided in matrix form (for general
boundary conditions) when only the third generation Yukawa couplings are
retained in the renormalisation group equations. We solve the evolution
equations of the KM matrix and the supersymmetry breaking soft terms in the
squark sector. We suggest a general parametrisation of the soft analytic terms,
more suitable for non-universal supergravity couplings. We point out that for
flavour dependent soft terms, there are new contributions to the neutron
electric dipole moment. Finally, we consider a model with maximal flavour
mixing in order to estimate the effects due to the renormalisation scale
dependence.


title: Heavy Quark Solitons: Towards Realistic Masses

abstract:
  A generalization of the effective meson Lagrangian possessing the heavy quark
symmetry to finite meson masses is employed to study the meson mass dependence
of the spectrum of S-- and P wave baryons containing one heavy quark or
anti-quark. These baryons are described as respectively heavy mesons or
anti-mesons bound in the background of a soliton, which is constructed from
light mesons. No further approximation is made to solve the bound state
equation. For special cases it is shown that the boundary conditions, which
have to be satisfied by the bound state wave--functions and stem from the
interaction with the light mesons, may impose additional constraints on the
existence of bound states when finite masses are assumed. Two types of models
supporting soliton solutions for the light mesons are considered: the Skyrme
model of pseudoscalars only as well as an extension containing also light
vector mesons. It is shown that only the Skyrme model with vector mesons
provides a reasonable description of both light and heavy baryons. Kinematical
corrections to the bound state equations are included in the discussion.


title: LEPTOP

abstract:
  This report consists of three parts. In Chapter 1 we present a brief
description of the LEPTOP approach for the calculation of the radiative
corrections in the Minimal Standard Model. The approach is based on the
one-loop approximation with respect to the genuinely electroweak interaction
for which simple explicit analytical formulae are valid. Starting from
$G_{\mu}, m_Z$ and $\bar{\alpha}\equiv \alpha(m^2_Z)$ as the main input
parameters, we consider all observables of the $Z$ boson decays and the mass of
the $W$ boson on the same footing. The dressing with gluonic corrections is
performed by using the results of calculations published by other authors. In
Chapter 2 theoretical uncertainties inherent to our approach and hence to the
LEPTOP computer program are analyzed. In Chapter 3 we describe the Fortran code
of LEPTOP. This code can be obtained on request from rozanov@afsmail.cern.ch.
This document can be accessed on http://cppm.in2p3.fr/leptop/intro_leptop.html
by WWW users.


title: Dilepton Emission From a Resonance Gas

abstract:
  We consider the dilepton emission from a dense and hot hadron gas near a
critical point. The hadron gas is described as a resonance one. The dilepton
spectrum generated by vector resonances is shown to be equivalent to the one
generated by quarks.


title:
THE ENERGY LOSSES OF RELATIVISTIC HIGHCHARGED IONS IN THE COLLISIONS
  WITH ATOMS

abstract:
  The energy losses at collisions of heavy multiplycharged ions with light
atoms have been considered under circumstances the ion charge Z>>1 and the
relative colliding velocity v>>1, so that Z~v=<c, where c - the light velocity
(atomic units are used). In this region of parameters the Born approximation
are not justificative. The simple formulas for effective stopping are obtained,
the comparison with effective stopping calculated in the Born approximation are
carried out.


title:
DIAGRAMMATIC ANALYSIS OF QCD GAUGE TRANSFORMATIONS AND GAUGE
  CANCELLATIONS

abstract:
  Diagrammatic techniques are invented to implement QCD gauge transformations.
These techniques can be used to discover how gauge-dependent terms are
cancelled among diagrams to yield gauge-invariant results in the sum. In this
way a multiloop pinching technique can be developed to change ordinary vertices
into background-gauge vertices. The techniques can also be used to design new
gauges to simplify calculations by reducing the number of gauge-dependent terms
present in the intermediate steps. Two examples are discussed to illustrate
this aspect of the applications.


title:
Possible Revelation of Seesaw Mass Pattern in Solar and Atmospheric
  Neutrino Data

abstract:
  Assuming the solar and atmospheric neutrino deficits to be due to neutrino
oscillations, it is shown that the 3X3 mass matrix spanning the e, mu, and tau
neutrinos may have already revealed a seesaw mass pattern. Also, this matrix is
the natural reduction of a simple 5X5 seesaw mass matrix with one large scale,
the 4X4 reduction of which predicts that a fourth neutrino would mix with the e
and mu neutrinos in such a way that oscillations between them may occur just
within the detection capability of the LSND (Liquid Scintillator Neutrino
Detector) experiment.


title: A Predictive SO(10) Scheme for Fermion Masses and Mixings

abstract:
  We present a predictive scheme for fermion masses and mixings inspired by
supersymmetric SO(10) in which the gauge hierarchy problem is resolved without
fine tuning the parameters. There are six predictions in the flavor sector, all
consistent with the present data. The scheme reproduces the familiar asymptotic
relations $m_b=m_\tau$ and $m_dm_sm_b=m_e m_\mu m_\tau$. A new expression for
$V_{cb}$ is obtained in terms of the quark masses. The remaining predictions
involve the quark mixing angles $V_{us}$ and $V_{ub}$, as well as the parameter
tan$\beta$ which turns out to be close to $m_t/m_b$.


title:
Extracting predictions from Supergravity/Superstring for the effective
  theory below the Planck scale

abstract:
  The connection between Superstring theory and the low--energy world is
analyzed. In particular, the soft Supersymmetry--breaking terms arising in
Supergravity theories coming from Superstrings are computed. Several solutions
proposed to solve the $\mu$ problem, and the $B$ soft term associated, are
discussed. The issue of gauge coupling constants unification in the context of
Superstrings is also discussed.


title: QCD Sum Rules and Applications to Nuclear Physics

abstract:
  Applications of QCD sum-rule methods to the physics of nuclei are reviewed,
with an emphasis on calculations of baryon self-energies in infinite nuclear
matter. The sum-rule approach relates spectral properties of hadrons
propagating in the finite-density medium, such as optical potentials for
quasinucleons, to matrix elements of QCD composite operators (condensates). The
vacuum formalism for QCD sum rules is generalized to finite density, and the
strategy and implementation of the approach is discussed. Predictions for
baryon self-energies are compared to those suggested by relativistic nuclear
physics phenomenology. Sum rules for vector mesons in dense nuclear matter are
also considered.


title:
An Inverted Mass Hierarchy for Hot Dark Matter and the Solar Neutrino
  Problem.

abstract:
  The cosmological model in which 20% of the dark matter is shared by two
nearly equal mass neutrinos fits the structure of the universe on all scales.
This has been motivated a $\nu_\mu$-$\nu_{\tau}$ oscillation explanation of the
deficit of atmospheric muon neutrinos. If the observed ratio of atmospheric
$nu_\mu$ to $\nu_e$ has an alternative explanation, the cosmological model can
be retained if the deficit of solar neutrinos is explained by
$\nu_e$-$\nu_{\tau}$ oscillation. In this case an inverted mass hierarchy is
required with $m_{\nu_{\mu}}\ll m_{\nu_e} \simeq m_{\nu_\tau}\approx 2.4$ eV.
We show that if there exists an $L_e- L_{\tau}$ symmetry in nature, both the
near mass degeneracy of \nue\ and \nut\ as well as the consistency of the above
values for neutrino masses with the negative results for neutrinoless double
beta decay search experiments are easily understood. We show that this symmetry
implemented in the context of a high-scale left-right symmetric theory with the
see-saw mechanism can lead to a simple theoretical understanding of the desired
form of the mass matrix.


title:
OPEN CHARM PRODUCTION IN HADRONIC AND HEAVY-ION COLLISIONS AT RHIC AND
  LHC ENERGIES TO $O(\alpha_s^3)$

abstract:
  We present results on rapidity and transverse momentum distributions of
inclusive charm quark production in hadronic and heavy-ion collisions at RHIC
and LHC energies, including the next-to-leading order, $O(\alpha_s^3)$,
radiative corrections and the nuclear shadowing effect. We determine the
hadronic and the {\it effective} (in-medium) K-factor for the differential and
total inclusive charm cross sections. We show that these K-factors have strong
$p_T$ dependence. We discuss how measurements of charm production at RHIC and
LHC can provide valuable information about the gluon density in a nucleus.


title: See-saw Enhancement of Neutrino Mixing due to the Right-handed Phases

abstract:
  We study the see-saw enhancement mechanism in presence of the right-handed
phases of the Dirac neutrino mass matrix and the Majorana mass matrix. The
enhancement condition given by Smirnov is modified. We point out that the
see-saw enhancement could be obtained due to the right-handed phases even if
the Majorana matrix is proportional to the unit matrix. We show a realistic
Dirac mass matrix which causes the see-saw enhancement.


title: $b \to s \gamma$ Decay and Right-handed Top-bottom Charged Current

abstract:
  We introduce an anomalous top quark coupling (right-handed current) into
Standard Model Lagrangian. Based on this, a more complete calculation of $b \to
s\gamma $ decay including leading log QCD corrections from $m_{top}$ to $M_W$
in addition to corrections from $M_{W}$ to $m_b$ is given. The inclusive decay
rate is found to be suppressed comparing with the case without QCD running from
$m_t$ to $M_W$ except at the time of small values of $|f_R^{tb}|$. e.g. when
$f_R^{tb}=-0.08$, it is only $1/10$ of the value given before. As $|f_R^{tb}|$
goes smaller, this contribution is an enhancement like standard model case.
  From the newly experiment of CLEO Collaboration, strict restrictions to
parameters of this top-bottom quark coupling are found.


title: The Measurement of M(W) from the W+W- Threshold Cross Section at LEP2

abstract:
  The rapid increase of the e+e- --> W+W- cross section in the threshold region
provides a method for measuring M(W) at LEP2. The dependence of the theoretical
cross section -- including the effects of the finite W width, Coulomb
interactions and initial state radiation -- on the collider energy and on the
mass and width of the W is investigated in order to deduce the optimal collider
energy which maximizes the sensitivity to M(W). Statistical and systematic
uncertainties are studied in detail. The background contribution from QCD
four-jet production is estimated. It is shown that by running LEP2 at a
collision energy of approximately 161 GeV and obtaining a luminosity of order
100 inverse picobarns per experiment, an uncertainty on the measured value of
M(W) of +-70 MeV should be achievable.


title: Heavy Meson Exclusive Decays in the Framework of QCD Sum Rules

abstract:
  We discuss applications of QCD sum rules on the light-cone to the form
factors of the exclusive transitions $B \rightarrow \pi$ and $D\rightarrow
\pi$, and to the $B^*B \pi$ and $D^*D \pi$ coupling constants. In the light of
our results we examine the pole dominance model for these form factors. A first
estimate is given on the nonfactorizable amplitude of the decay $ B \ra J/\psi
K$.


title: Extended analysis of the "penguin" part of $K\to\pi\pi$ amplitude

abstract:
  We make an attempt to clarify the role of the annihilation or "penguin" mode
in the description of the $K\rightarrow\pi\pi$ decay within the Standard Model.
The attention is concentrated on new operators in the effective $\Delta S=1$
Hamiltonian and the violation of factorization for mesonic matrix elements of
the local four-quark operators. We propose a regular method to evaluate the
mesonic matrix elements of $K\rightarrow\pi\pi$ transitions based on studying
three-point correlators via {\it QCD} sum rules using the chiral effective
theory as an underlying low-energy model for strong interaction. Matrix
elements of the {\it QCD} penguin operator are calculated within this approach.
The total "penguin" contribution is found to be relatively large that improves
the theoretical description of the $\Delta I=1/2$ rule in non-leptonic kaon
decays.


title:
The Non-Minimal Supersymmetric Standard Model with $\tan\beta\simeq
  m_t/m_b$

abstract:
  We consider the supersymmetric extension of the standard model with an
additional singlet $S$, the Non-Minimal Supersymmetric Standard Model (NMSSM),
in the limit $\tan\beta \simeq m_t/m_b$. We embed this model in a supergravity
framework with universal boundary conditions and analyze the renormalization
group improved tree-level potential. We examine the relationship between this
model and the minimial supersymmetric standard model (MSSM), and discuss the
novel connections between the two when $\tan\beta$ is large. Strong
correlations between the free parameters of the nonminimal model are found and
the reasons for these discussed. The singlet vacuum expectation value is forced
to be large, of the order of $10 TeV$. The radiatively corrected mass of the
lightest Higgs boson is found to be $\stackrel{_<}{_\sim} 140 GeV$.


title: A Haplousterotic Model for the Nucleon Quark Distribution Amplitude

abstract:
  Using the criteria of simplicity, positivity, smoothness and process-
independence of construction, we find a non-polynomial model for the quark
distribution amplitude of the nucleon that is in agreement with QCD sum-rule
constraints. This simpler ("haplousterotic") model solves some of the problems
connected with the longitudinal momentum dependence of the wave function,
whereas the k_T-dependence of the wave function, which is also important, is
still left undetermined. The expansion pro- perties of the model into a
polynomial series are examined.


title: PERTURBATIVE STUDY OF THE ELECTROWEAK PHASE TRANSITION

abstract:
  The electroweak phase transition is studied at finite temperature. The
effective action is given to higher orders, including wave function correction
factors and the full $g^4,\lambda^2$ effective potential. An upper bound for
the Higgs mass $m_{H} \approx 70\ GeV$ is concluded for the reliability of the
perturbative approach. A gauge invariant treatment of the phase transition is
presented.


title: A Model for the decay of the $D_s^{+}$ meson into three pions,

abstract:
  We propose a phenomenological two component model describing the decay
amplitude of the process $D_s^{+} \ra 3 \pi$, whose rate has been found
surprisingly large. The first component is a constant background $F_{NR}$, and
the second one is a Breit-Wigner type amplitude associated to a quasi two body
$f_0(980)$ $\pi^{+}$ state. We show that it is possible to reproduce the
observed rate for $D_s^{+} \ra \pi^{+}\pi^{+}\pi^{-}$ as well as the two other
measured branching ratios for the non resonant part and the resonant
$f_0\pi^{+}$ one, with a common parameter $F_{NR}$. Predictions are given for
the $D_s^{+} \ra \pi^{0}\pi^{0}\pi^{+}$ rates, as well as for the various
$\pi^{+}$ and $\pi^{-}$, or $\pi^{0}$ and $\pi^{+}$ energy distributions for
the two possible final states.


title: NEUTRINO PHYSICS

abstract:
  The theoretical motivations, experimental searches/hints, and implications of
neutrino mass are surveyed.


title:
Where does the Rho Go? Chirally Symmetric Vector Mesons in the
  Quark--Gluon Plasma.

abstract:
  If the phase transition of $QCD$ at nonzero temperature is dominated by the
(approximate) restoration of chiral symmetry, then the transition might be
characterized using a gauged linear sigma model. Assuming that vector meson
dominance holds, such sigma models predict that at the temperature of chiral
restoration, the pole mass of the thermal $\rho$ meson is greater than that at
zero temperature; in the chiral limit and in weak coupling this mass is $\sim
962 \, MeV$. The width of the thermal $\rho-a_1$ peak is estimated to be about
$200 - 250 \, MeV$.


title: Thermal rho's in the quark-gluon plasma

abstract:
  I discuss different models which predict changes in the mass of the thermal
$\rho$ field. I emphasize that while the predictions are strongly model
dependent, nevertheless substantial shifts in the thermal $\rho$ mass are
expected to occur at the point of phase transition. As long as the thermal
$\rho$ peak does not become too broad, this should provide a striking signature
of the existence of a phase transition. (Based upon a talk presented at Quark
Matter '95, Monterey, CA, Jan., 1995.)


title: Applications of chiral symmetry

abstract:
  I discuss several topics in the applications of chiral symmetry at nonzero
temperature, including: where the rho goes, disoriented chiral condensates, and
the phase diagram for $QCD$ with $2+1$ flavors. (Based upon talks presented at
the "Workshop on Finite Temperature $QCD$", Wuhan, P.R.C., April, 1994.)


title: Natural Inflation From Fermion Loops

abstract:
  ``Natural'' inflationary theories are a class of models in which inflation is
driven by a pseudo-Nambu-Goldstone boson. In this paper we consider two models,
one old and one new, in which the potential for inflation is generated by loop
effects from a fermion sector which explicitly breaks a global $U(1)$ symmetry.
In both models, we retrieve the ``standard'' natural inflation potential,
$V\left(\theta\right) = \Lambda^4\left[1 + \cos\left(\theta /
\mu\right)\right]$, as a limiting case of the exact one-loop potential, but we
carry out a general analysis of the models including the limiting case.
Constraints from the COBE DMR observation and from theoretical consistency are
used to limit the parameters of the models, and successful inflation occurs
without the necessity of fine-tuning the parameters.


title: Rho-omega Mixing and the Pion Electromagnetic Form-Factor

abstract:
  The suggestion of momentum dependence in the amplitude for rho-omega mixing
has generated concern over related implications for vector meson dominance and
the photon-rho coupling. We discuss two established representations of vector
meson dominance and show that one of these is completely consistent with such a
coupling. We then apply it to a calculation of the pion electromagnetic
form-factor. Our analysis leads to a new value for the on-shell rho-omega
mixing amplitude of (-3800 +/- 370) MeV^2.


title:
THE PROTON SPIN PUZZLE AND DEPOLARIZATION IN
  $\bar{p}p\to\bar{\Lambda}\Lambda$

abstract:
  We point out that the measurement of target spin depolarization $D_{nn}$ in
the $\bar{p}p\to\bar{\Lambda}\Lambda$ reaction may test dynamical mechanisms
invoked to explain the proton spin puzzle revealed by polarized deep--inelastic
scattering experiments. In particular, models with {\it negatively} polarized
$\bar{s}s$ pairs in the proton wave function predict $D_{nn}<0$, whereas models
with {\it positively} polarized gluons would predict $D_{nn}>0$.


title: Phase Diagram of Superconductors from Non-Perturbative Flow Equations

abstract:
  The universal behaviour of superconductors near the phase transition is
described by the three-dimensional field theory of scalar quantum
electrodynamics. We approximately solve the model with the help of
non-perturbative flow equations. A first- or second-order phase transition is
found depending on the relative strength of the scalar versus the gauge
coupling. The region of a second-order phase transition is governed by a fixed
point of the flow equations with associated critical exponents. We also give an
approximate description of the tricritical behaviour and briefly discuss the
crossover relevant for the onset of scaling near the critical temperature.
Final confirmation of a second-order transition for strong type-II
superconductors requires further analysis with extended truncations of the flow
equations.


title: Primordial Baryon Asymmetry and Sphalerons

abstract:
  I show that a cosmological baryon asymmetry generated at the GUT scale is in
general safe against washout due to sphalerons and generic $B$- or
$L$-violating effects. This result is mainly due to the (almost) conserved
number of right-handed electrons at high temperatures $T \gsim {\cal O}(10) $
TeV, but also the mass corrections, in particular the thermal masses of leptons
act as the protector of the primordial baryon asymmetry.


title:
Status and prospect for determining $f_B$, $f_{B_s}$, $f_{B_s} / f_B$ on
  the lattice

abstract:
  Preliminary results from the MILC collaboration for $f_B$, $f_{B_s}$, $f_D$,
$f_{D_s}$ and their ratios are presented. We compute in the quenched
approximation at $\beta=6.3$, 6.0 and 5.7 with Wilson light quarks and static
and Wilson heavy quarks. We attempt to quantify all systematic errors other
than quenching, and have a first indication of the size of quenching errors.


title:
Connections between Dynamical and Renormalization Group Techniques in
  Top Condensation Models

abstract:
  Predictions for the ratio $M_W/m_t$ arise in top condensation models from
different methods. One type of prediction stems from Pagels--Stokar relations
based on the use of Ward Identities in the calculation of the \GB decay
constants and expresses $M_W$ in terms of integrals containing the dynamically
generated mass function $\Sigma_t(p^2)$. Another type of prediction emerges
from the renormalization group equations via infrared quasi--fixed--points of
the running top quark Yukawa coupling. We demonstrate in this paper that in the
limit of a high cutoff these two methods lead to the same predictions for
$M_W/m_t$ and $M_W/M_H$ in lowest loop order.


title: The Standard Model on a Planck Lattice: Mixing Angles vs Quark Masses

abstract:
  Proceeding in our research programme on the Standard Model (SM) on a Planck
lattice (PLSM) we analyse the emergence of the quark masses through a
``superconducting'' mechanism of spontaneous violation of the chiral symmetry
of the Standard Model. Due to the peculiar structure of the lattice coupling of
the $W^\pm$ gauge bosons, we discover four new relationships between the angles
of the mixing matrix and the (current) quark masses. In particular, we predict
the CP-violating phase $\delta_{13}\simeq 79^\circ$.


title: Big Bang Nucleosynthesis

abstract:
  The current status of big bang nucleosynthesis and its implications for
physics beyond the standard model is reviewed. In particular, limits on the
effective number of neutrino flavors and extra Z gauge boson masses are
updated.


title:
Equivalence of the Parke-Taylor and the Fadin-Kuraev-Lipatov amplitudes
  in the high-energy limit

abstract:
  We give a unified description of tree-level multigluon amplitudes in the
high-energy limit. We represent the Parke-Taylor amplitudes and the
Fadin-Kuraev-Lipatov amplitudes in terms of color configurations that are
ordered in rapidity on a two-sided plot. We show that for the helicity
configurations they have in common the Parke-Taylor amplitudes and the
Fadin-Kuraev-Lipatov amplitudes coincide.


title: Tetraquarks: Mesons with two $b$ quarks

abstract:
  We look for the existence of stable (by strong interactions) tetraquarks,
mesons containing two heavy antiquarks and two light quarks, specifically a
$|{\bar b}{\bar b}qq\rangle$ state. This state is viewed as two $|{\bar
b}q\rangle $ particles bound by a potential due to the exchange of the four
light pseudoscalar and vector mesons, namely the $\pi,\ \eta,\ \rho$ and
$\omega$. Couplings of these particles are obtained by the use of heavy quark
symmetry. We find that the $I=0,\ J=1$ state is bound for a large range of
parameters, while all other states are not bound (the $I=1,\ J=0$ system may be
bound for some parameters at the extreme range of their allowed values). We
discuss the reasons why the techniques used cannot be extended to mesons
containing two $c$ quarks or a $c$ and $b$ quark.


title:
Supersymmetric "Solutions" to Cosmological Problems: Baryogenesis and
  Dark Matter

abstract:
  The possible role of supersymmetry in our understanding of big bang
baryogenesis and cosmological dark matter is explored. The discussion will be
limited to the out-of equilibrium decay scenario in SUSY GUTs, the decay of
scalar condensates, and lepto-baryogenesis as a means for generating the
observed baryon asymmetry. Attention will also be focused on neutralino dark
matter.


title:
What can we learn from the measurement $R_b \equiv \Gamma(Z\to b
  \overline{b}) / \Gamma(Z\to {\rm hadrons})$?

abstract:
  We examine the effect of new physics on the $R_b \equiv \Gamma(Z\rightarrow
\bar{b}b)/\Gamma(Z\rightarrow {\rm hadrons})$. Conditions for large
contributions are derived.


title:
Finite Width Effects and Gauge Invariance in Radiative $W$ Production
  and Decay

abstract:
  The naive implementation of finite width effects in processes involving
unstable particles can violate gauge invariance. For the example of radiative
$W$ production and decay, $q\bar q' \to \ell\nu\gamma$, at tree level, it is
demonstrated how gauge invariance is restored by including the imaginary part
of triangle graphs in addition to resumming the imaginary contributions to the
$W$ vacuum polarization. Monte Carlo results are presented for the Fermilab
Tevatron.


title: Consequences of Low Energy Dynamical Supersymmetry Breaking

abstract:
  Relatively simple models can be constructed in which supersymmetry is
dynamically broken at energies of $10^5-10^7$ GeV. Models of this kind do not
suffer from the naturalness and cosmological difficulties of conventional
supergravity models, and make definite predictions for the spectrum of
supersymmetric particle masses. Thus ``Renormalizable Visible Sector Models''
are a viable alternative to more conventional approaches. This talk mostly
summarizes the results of a recent paper written with Michael Dine and Yuri
Shirman.


title: Gluon Fragmentation into $^3P_J$ Quarkonium

abstract:
  The functions of the gluon fragmentation into $^3P_J$ quarkonium are
calculated to order $\alpha_s^2$. With the recent progress in analysing
quarkonium systems in QCD we show explicitly how the socalled divergence in the
limit of the zero-binding energy, which is related to $P$-wave quarkonia, is
treated correctly in the case of fragmentation functions. The obtained
fragmentation functions satisfy explicitly at the order of $\alpha_s^2$ the
Altarelli-Parisi equation and when $z\rightarrow 0$ they behave as $z^{-1}$ as
expected. Some comments on the previous results are made.


title:
Thermal photons as a measure for the rapidity dependence of the
  temperature

abstract:
  The rapidity distribution of thermal photons produced in Pb+Pb collisions at
CERN-SPS energies is calculated within scaling and three-fluid hydrodynamics.
It is shown that these scenarios lead to very different rapidity spectra. A
measurement of the rapidity dependence of photon radiation can give cleaner
insight into the reaction dynamics than pion spectra, especially into the
rapidity dependence of the temperature.


title:
Intermediate mass standard model Higgs boson at the proposed CERN
  LEP$\otimes$LHC $ep$ collider

abstract:
  The production of the \sm\ Higgs $\phi$ with intermediate mass at the
proposed CERN LEP$\otimes$LHC $ep$ collider in $\gamma q(\bar q)\rightarrow
W^\pm\phi q'(\bar q')$, $\gamma q(\bar q)\rightarrow Z^0\phi q(\bar q)$ and
$g\gamma\rightarrow q\bar q\phi$ events is studied. This is done for all
possible (massive) flavours of the quarks $q(q')$ and using photons generated
via Compton back--scattering of laser light. We study signatures in which the
Higgs decays to $b\bar b$--pairs and the electroweak vector bosons $W^\pm$ and
$Z^0$ decay either hadronically or leptonically. All possible backgrounds to
these signals are also computed. Flavour identification on $b$--jets is
assumed. Explicit formulae for the helicity amplitudes of the above processes
are given.


title:
REAL-TIME DESCRIPTION OF PARTON-HADRON CONVERSION AND CONFINEMENT
  DYNAMICS

abstract:
  We propose a new and universal approach to the hadronization problem that
incorporates both partonic and hadronic degrees of freedom in their respective
domains of relevance, and that describes the conversion between them within a
kinetic field theory formulation in real time and full 7-dimensional phase
space. We construct a scale-dependent effective theory that reduces to
perturbative QCD with its scale and chiral symmetry properties at short
space-time distances, but at large distances (r > 1 fm) yields symmetry
breaking gluon and quark condensates plus hadronic excitations. The approach is
applied to the evolution of fragmenting qq~ and gg jet pairs as the system
evolves from the initial 2-jet configuration, via parton showering and cluster
formation, to the final yield of hadrons. The phenomenological implications for
e+e- -> hadrons are investigated, such as the time scale of the transition, and
its energy dependence, cluster size and mass distributions. We compare our
results for particle production and Bose-Einstein correlations with
experimental data, and find an interesting possibility of extracting the basic
parameters of the space-time evolution of the system from Bose enhancement
measurements.


title: Fluctuation corrections to bubble nucleation

abstract:
  The fluctuation determinant which determines the preexponential factor of the
transition rate for minimal bubbles is computed for the electroweak theory with
$\sin \Theta_W = 0$. As the basic action we use the three-dimensional
high-temperature action including, besides temperature dependent masses, the $T
\Phi^3$ one-loop contribution which makes the phase transition first order. The
results show that this contribution (which has then to be subtracted from the
exact result) gives the dominant contribution to the one-loop effective action.
The remaining correction is of the order of, but in general larger than the
critical bubble action and suppresses the transition rate. The results for the
Higgs field fluctuations are compared with those of an approximate heat kernel
computation of Kripfganz et al., good agreement is found for small bubbles,
strong deviations for large thin-wall bubbles.


title: Deep Inelastic Electron-Pomeron Scattering at HERA

abstract:
  We have substantially extended our analysis of the partonic content of the
pomeron. Ambiguities in the normalization of the pomeron flux and the
possiblity of a direct coupling of the pomeron to single quarks are discussed,
yielding two equally possible scenarios for the parton distributions in the
pomeron. We discuss various experimental tests of these scenarios.


title: THE ENERGY LOSSES OF RELATIVISTIC HIGH CHARGED IONS

abstract:
  The energy losses at collisions of heavy multiply charged ions with light
atoms and polarization losses at moving through the matter have been considered
under circumstances the ion charge Z>>1 and the relative colliding velocity
v>>1, so that Z~v=<c, where c - the light velocity (atomic units are used). In
this region of parameters the Born approximation are not justificative. The
simple formulas for effective stopping are obtained, the comparison with other
theoretical results and experiments are given.


title: Hard Photons in W Pair Production at LEP 2

abstract:
  The properties of hard photon radiation in $W$ pair production at LEP 2 are
studied, with emphasis on the energy loss relevant to the W mass measurement.
We use a combination of the exact 1-photon matrix element and leading
logarithmic structure functions. Defining unobservable, observable and initial
state photons in the phase space, it is shown that neither the one-photon
matrix element nor the leading logarithmic structure functions alone give an
adequate description of the energy loss due to observable or initial state
photons. An event generator based on these calculations is available.


title: QCD effects and $b$-tagging at LEP I

abstract:
  We analyze the impact of using $b$-tagged samples in studying non-Abelian
effects due to QCD in $e^+e^-\ar 4$jet events at $\sqrt s=M_{Z^0}$, using
angular variable analyses and comparisons with $e^+e^-\ar 3 \mbox{jet}\gamma$
events. We find that QCD effects are largely enhanced in $b$-quark samples with
respect to `unflavoured' ones, where energy-ordering is used to distinguish
between gluon and quark jets. We show that the $b$-quark mass influences the
angular distributions significantly and should not be neglected


title: Topological Incarnations of Electroweak Defects

abstract:
  We propose a criterion to classify hybrid defects occurring in field
theoretic models such as the standard electroweak model. This criterion leads
us to consider the minimal extension of the electroweak model in which
electroweak magnetic monopoles and $Z$-strings are topological. We briefly
discuss the cosmology of such defects.


title: Quarkonium Wave Functions at the Origin

abstract:
  We tabulate values of the radial Schr\"{o}dinger wave function or its first
nonvanishing derivative at zero quark-antiquark separation, for $c\bar{c}$,
$c\bar{b}$, and $b\bar{b}$ levels that lie below, or just above, flavor
threshold. These quantities are essential inputs for evaluating production
cross sections for quarkonium states.


title:
Effect of $q\bar q$ Initial-state Interaction on Dilepton Emission Rate
  from Quark-Gluon Plasma

abstract:
  We calculate the dilepton production rate from a thermalized quark-gluon
plasma in heavy-ion collisions at RHIC energies. Higher-order QCD corrections
are included by using an analytical correction factor $K^{(i)}$, which takes
into account the $q\bar q$ initial-state interactions. We show that the
analytic correction factor gives very good agreement with experimental
Drell-Yan data and leads to large enhancement of the thermal dilepton emission
rates. We compare the thermal dilepton yields with the expected production from
open-charm decays and Drell-Yan background and assess the prospects of
observing thermal dileptons from the quark-gluon-plasma at invariant masses of
a few GeV.


title:
Reconciling Supersymmetric Grand Unification with $\alpha_s(m_Z)\approx
  0.11$

abstract:
  We argue that supersymmetric grand unification of gauge couplings is not
incompatible with small $\alpha_s$, even without large GUT-scale corrections,
if one relaxes a usual universal gaugino mass assumption. A commonly assumed
relation $M_2\simeq m_{\rm gluino}/3$ is in gross contradiction with
$\alpha_s\approx 0.11$. Instead, small $\alpha_s$ favors $M_2\gg m_{\rm
gluino}$. If this is indeed the case our observation casts doubt on another
commonly used relation $M_1\simeq 0.5 M_2$ which originates from the same
constraint of a common gaugino mass at the GUT scale. One firm prediction
emerging within the small $\alpha_s$ scenario with the unconstrained gaugino
masses is the existence of a relatively light gluino below $\sim$ 200\gev.


title:
Equivalence Theorem as a Criterion for Probing the Electroweak Symmetry
  Breaking Mechanism

abstract:
  Based upon our recent study on the Lorentz non-invariance ambiguity in the
longitudinal weak-boson scatterings and the precise conditions for the validity
of the Equivalence Theorem (ET), we further examine the intrinsic connection
between the longitudinal weak-boson scatterings and probing the electroweak
symmetry breaking (EWSB) mechanism. We reveal the profound physical content of
the ET as being able to discriminate processes which are insensitive to probing
the EWSB sector. With this physical content as a criterion, we analyze the
sensitivities to various effective operators for probing the mechanism of the
EWSB.


title: Electroweak Baryogenesis

abstract:
  Baryogenesis during the electroweak phase transition is a plausible scenario
for for the origin of matter in the Universe. Furthermore, it has the advantage
over other scenarios in that one can imagine that much of the physics involved
may be experimentally probed before long. In the past year a consensus has
developed about major mechanisms involved. In this talk I give an overview of
the standard picture, and discuss briefly the advances over the past year that
suggest electroweak baryogenesis is a robust phenomenon.


title: Hunting for the Beauty: Heavy-Light Quark Systems on the Lattice

abstract:
  We present selected topics on heavy-light physics on the lattice in order to
illustrate the current status of this field. In particular results concerning
$f_B$, semileptonic decays, the decay $B \rightarrow K^*\gamma$ and heavy
baryon masses are discussed. Special emphasis is paid to the question of
systematic effects which stem from the lattice discretization of QCD.


title: Neutralino Production as SuSy Discovery Process at CERN LEP2

abstract:
  A thorough study is performed on pair production and signatures of
supersymmetric neutralinos in the MSSM at LEP2. Particular attention is paid to
the region of the SuSy parameter space where the associated production of
lightest and next-to-lightest neutralinos is the only visible allowed
supersymmetric process. In that region, the signal is critically dependent on
the selectron masses m(e_L,R). For sqrt(s)/2 < m(e_L,R) < 200-300 GeV and
charginos above the threshold for pair production, neutralinos arising from
e+e- --> X0(1)X0(2) could be the only SuSy signal detectable at LEP2.


title: The SUSY-GRACE system

abstract:
  We introduce a new method to treat Majorana fermions on the GRACE system
which has been developed for the computation of the matrix elements for the
processes of the standard model. In the standard model, we already have such
particles as Dirac fermions, gauge bosons and scalar bosons in the system. On
the other hand, in the SUSY models there are Majorana fermions. In the first
instance, we have constructed a system for the automatic computation of
cross-sections for the processes of the SUSY QED. It is remarkable that our
system is also applicable to another model including Majorana fermions (e.g.
MSSM) once the definition of the model file is given.


title: The automatic computation for SUSY processes

abstract:
  We have constructed a system for the automatic computation of cross-sections
for the processes of the SUSY QED by the extension of the GRACE system
including a Majorana fermion. The system has also been applied to another model
including Majorana fermions, MSSM, by the definition of the model file.


title: The GRACE system for SUSY processes

abstract:
  We introduce a new method to treat Majorana fermions on the GRACE system
which has been developed for the automatic computation of the matrix elements
for the processes of the standard model. In the GRACE system, we already have
such particles as Dirac fermions, gauge bosons and scalar bosons within the
standard model. On the other hand, in the SUSY models there are Majorana
fermions. In the first instance, we have constructed a system for the automatic
computation of cross-sections for the processes of the SUSY QED. The system has
also been applied to another model including Majorana fermions, the minimal
SUSY standard model (MSSM), by the re-definition of the model file.


title: SUSY SU(6) GIFT for doublet-triplet splitting and fermion masses

abstract:
  The supersymmetric $SU(6)$ model equipped by the flavour-blind discrete gauge
symmetry $Z_3$ is considered. It provides simultaneous solution to the
doublet-triplet splitting problem, $\mu$-problem and leads to natural
understanding of fermion flavour. The Higgs doublets arise as Goldstone modes
of the spontaneously broken {\em accidental} global symmetry $SU(6)\times U(6)$
of the Higgs superpotential. Their couplings to fermions have peculiarities
leading to the consistent picture of the quark and lepton masses and mixing,
without invoking the horizontal symmetry or zero texture concepts. In
particular, the only particle that has direct $O(1)$ Yukawa coupling with the
Higgs doublet is top quark. Other fermion masses arise from the higher order
operators, with natural mass hierarchy described in terms of small ratios
$\eps_\Sigma=V_\Sigma/V_H$ and $\eps_H=V_H/M$, where $V_H$ and $V_\Sigma$
correspondingly are the $SU(6)$ and $ SU(5)$ symmetry breaking scales, and $M$
is a large (Planck or string) scale. The model automatically implies $b-\tau$
Yukawa unification. Specific mass formulas are also obtained, relating the down
quark and charged lepton masses. Neutrinos get small ($\sim 10^{-5}\,$eV)
masses which can be relevant for solving the solar neutrino problem via long
wavelength vacuum oscillation.


title:
Realistic SUSY model with four fermion families, natural R parity and
  $\nu_\tau$ in the eV Range

abstract:
  We study an extension of the supersymmetric standard model with four families
and gauged horizontal symmetry $SU(4)_H$, in which R parity automatically
follows as a consequence of gauge invariance and of the field content of the
model. Beyond ensuring R parity conservation, the horizontal symmetry allows
for the dynamical generation of a hierarchical pattern of fermion masses,
without the need of any ad hoc choice of small Yukawa couplings. The structure
of the mass matrices implies that the fourth family does not mix with the other
three, and that the $b',t',\tau',\nu'$ masses are all naturally in the 100 GeV
range. The model has other interesting phenomenological implications. The scale
of the horizontal symmetry breaking is constrained by cosmological and
astrophysical arguments to be $\sim 10^{11}$ GeV. Then the late $b'$ decays
could explain a magnitude of the isotropic cosmic gamma flux. In addition, a
lower bound of a few eV is found for the mass of the $\tau$-neutrino, which can
thus provide a hot component for the cosmological dark matter. Due to R parity
conservation, the lightest supersymmetric particle is stable and can provide
the cold component. The $\nu_e$ and $\nu_\mu$ masses can naturally be in the
correct ranges for a solution of the solar or atmospheric neutrino problems via
neutrino oscillations.


title: Improved bounds on non-luminous matter in solar orbit

abstract:
  We improve, using a larger set of observations including Voyager 2 Neptune
flyby data, previous bounds on the amount of dark matter (DM) trapped in a
spherically symmetric distribution about the sun. We bound DM by noting that
such a distribution would increase the effective mass of the sun as seen by the
outer planets and by finding the uncertainty in that effective mass for Uranus
and Neptune in fits to the JPL Developmental Ephermeris residuals, including
optical data and those two planets' Voyager 2 flybys. We extend our previous
procedure by fitting more parameters of the developmental ephemerides.
Additionally, we present here the values for Pioneer 10 and 11 and Voyager 1
and 2 Jupiter ranging normal points (and incorporate these data as well). Our
principal result is to limit DM in spherically symmetric distributions in orbit
about the sun interior to Neptune's orbit to less than an earth mass and
interior to Uranus' orbit to about 1/6 of an earth's mass.


title: NEUTRINO OSCILLATIONS WITH BEAMS FROM AGN'S AND GRB'S

abstract:
  I discuss how a 1 KM3 neutrino detector can be used to study $\nu_\tau$
oscillations at PeV energies with neutrinos from AGN's and to study neutrinos
from GRB's.


title:
HADRONIC PENGUINS IN $B$ DECAYS AND EXTRACTION OF $\alpha$, $\beta$ AND
  $\gamma$

abstract:
  Electroweak penguin operators become important when $m_t \approx 174$ GeV. We
discuss their implications for measuring CP violating phases $\alpha$, $\beta$
and $\gamma$.


title: TEST OF CP VIOLATION IN NON-LEPTONIC HYPERON DECAYS

abstract:
  In this talk I discuss CP violation in hyperon decays in Left-Right symmetric
models. I show that the asymmetry in polarization in $\Lambda \to p\pi^-$ can
be as large as $6\times 10^{-4}$ in these models, which is an order of
magnitude larger than the Standard Model prediction.


title:
An intermediate-mass Higgs boson in two-photon coherent processes at the
  LHC

abstract:
  We reexamine the prospects of searching for a neutral Higgs boson in the
intermediate-mass range, using the proton- and ion-beam facilities of the LHC
to study coherent two-photon processes. Considering realistic design
luminosities for the different ion beams, we find that beams of light-to-medium
size ions like calcium will give the highest production rates. With a suitable
trigger and assuming a b-quark identification efficiency of $30\%$ and a
$b{\bar b}$ mass resolution of 10 GeV one could expect to see a Higgs signal in
the $b{\bar b}$ channel with a 3-4 $\sigma$ statistical significance in the
first phase of operation of the LHC with beams of calcium.


title:
TRIPLE-PRODUCT SPIN-MOMENTUM CORRELATIONS IN POLARIZED Z DECAYS TO THREE
  JETS.

abstract:
  We discuss hard rescattering effects that can be measured using CP-even,
T$_{\rm N}$-odd triple-product observables in polarized $Z$ decays to three
jets. We show that the standard model contributions, from both QCD and
electroweak rescattering, are very small. Thus these measurements are
potentially sensitive to physics beyond the standard model. We investigate one
such contribution which involves a new gauge boson coupling to baryon number.


title:
Re-examination of the Perturbative Pion Form Factor with Sudakov
  Suppression

abstract:
  The perturbative pion form factor with Sudakov suppression is re-examined.
Taking into account the multi-gluon exchange in the law $Q^2$ regions, we
suggest that the running coupling constant should be frozen at
$\alpha_s(t=\sqrt{<{\bf k}_{T}^{2}>})$ and $\sqrt{<{\bf k}_{T}^{2}>}$ is the
average transverse momentum which can be determined by the pionic wave
function. In addition, we correct the previous calculations about the Sudakov
suppression factor which plays an important role in the perturbative
predictions for the pion form factor.


title: INFLATION INDUCED SUSY BREAKING AND FLAT VACUUM DIRECTIONS

abstract:
  We discuss how the inflation induced supersymmetry breaking affects the flat
directions of SUSY vacua. We show that under general assumptions all gauge
nonsinglet fields, parameterizing flat directions (and in particular squarks
and sleptons), get large $radiative$ masses which are related to the value of
the Hubble constant ($H$) and to the expectation value of the inflaton field.
This mass (typically $\sim H$) is of ``non-gravitational'' origin and does not
vanishes in the global SUSY limit. Large radiative corrections are induced by
$F$-term (or $D$-term) density, which dominates the inflationary universe and
strongly breaks supersymmetry. In such theories it is difficult to treat
squarks and sleptons as the light fields in the inflationary period. In the
generic supergravity theories all flat directions, including moduli, are
getting curvature of order the Hubble constant. However, for the
gauge-nonsinglet flat directions radiative contribution to the curvature
(induced by renormalizable gauge interactions) may be dominant.


title:
Double Penguins and the Contribution of Vector Meson--like States to the
  Decays $B \to K^* \gamma, \, B \to \rho \gamma$

abstract:
  Using perturbative QCD, the contribution at the leading twist, leading
$\alpha_s$ level, of charm and up quark loops to the decays $B \rightarrow K^*
\gamma$ and $B \rightarrow \rho \gamma$ is presented. In the case of $B
\rightarrow \rho \gamma$, the relative importance of these contributions depend
upon the unknown CKM matrix elements $V_{bu}$ and $V_{td}$.
  Assuming that the ratio $r = V_{bc}V^*_{cd}/V_{bt}V^*_{td}$ is bounded
between $-2.25 \le r \le -.5$ as is suggested by the Particle Data Group, the
error in extracting $ |V_{td}/V_{ts}| $ by these decays is estimated.


title:
Gauge Invariant three Boson Vertices and their Ward Identities in the
  Standard Model

abstract:
  In the context of the Standard Model we extend the S--matrix pinch technique
for non--conserved currents to the case of three boson vertices. We outline in
detail how effective gauge invariant three boson vertices can be constructed,
with all three incoming momenta {\it off--shell}. Explicit closed expressions
for the vertices $\gamma W^- W^+$, $Z W^- W^+$, and $\chi W^- W^+$ are
reported. The three boson vertices so constructed satisfy naive QED--like Ward
identities which relate them to the gauge invariant gauge boson self--energies
previously constructed by the same method. The derivation of the aforementioned
Ward identities relies on the sole requirement of complete gauge invariance of
the S--matrix element considered; in particular, no knowledge of the explicit
closed form of the three boson vertices involved is necessary.The validity of
one of these Ward identities is demonstrated explicitly, through a detailed
diagrammatic one-loop analysis, in the context of three different gauges.


title: Wee partons in large nuclei: from virtual dream to hard reality

abstract:
  We construct a weak coupling, many body theory to compute parton
distributions in large nuclei for $x\ll A^{-1/3}$. The wee partons are highly
coherent, non--Abelian Weizs\"{a}cker--Williams fields. Radiative corrections
to the classical results are discussed. The parton distributions for a single
nucleus provide the initial conditions for the dynamical evolution of matter
formed in ultrarelativistic nuclear collisions.


title:
SELF-ENERGY PECULIARITIES OF THE HOT GAUGE THEORY AFTER SYMMETRY
  BREAKING

abstract:
  A tensor representation of the gluon propagator is found within covariant
gauges for a non-Abelian theory after symmetry breaking due to $<A_0>\ne 0$ and
the exact equations which determine the dispersion laws of plasma excitations
are explicitly obtained. In the high temperature region and fixing the Feynman
gauge we solved these equations and found the damping of the plasma
oscillations and the shifting of their frequency. The phase transition of a
gauge symmetry restoration is estimated to be $\alpha_c(T) \approx{4/3}$.


title:
$\pi^{-}$ tagging in $\Lambda \to p \pi $ decay in homogeneous and
  inhomogeneous magnetic fields.

abstract:
  We simulate the resolution power of a simple spectrometer with
exemplificative magnetic fields for the \pi tagging in the $\Lambda \
\rightarrow \ p \pi $ decay for fixed target type experiments.


title: A new evolution equation

abstract:
  We propose a new evolution equation for the gluon density relevant for the
region of small $x_B$. It generalizes the GLR equation and allows deeper
penetration in dense parton systems than the GLR equation does. This
generalization consists of taking shadowing effects more comprehensively into
account by including multigluon correlations, and allowing for an arbitrary
initial gluon distribution in a hadron. We solve the new equation for fixed
$\alpha_s$. We find that the effects of multigluon correlations on the
deep-inelastic structure function are small.


title: Kaon Condensation in Dense Stellar Matter

abstract:
  This article combines two talks given by the authors and is based on works
done in collaboration with G.E. Brown and D.-P. Min on kaon condensation in
dense baryonic medium treated in chiral perturbation theory using heavy-baryon
formalism. It contains, in addition to what was recently published,
astrophysical backgrounds for kaon condensation discussed by Brown and Bethe, a
discussion on a renormalization-group analysis to meson condensation worked out
together with H.K. Lee and S.-J. Sin, and the recent results of K. M.
Westerberg in the bound-state approach to the Skyrme model. Negatively charged
kaons are predicted to condense at a critical density $2\lsim \rho/\rho_0\lsim
4$, in the range to allow the intriguing new phenomena predicted by Brown and
Bethe to take place in compact star matter.


title:
Neutron Electric Dipole Moment in the Minimal Supersymmetric Standard
  Model

abstract:
  Neutron electric dipole moment (EDM) due to single quark EDM and to the
transition EDM is calculated in the minimal supersymmetric standard model.
Assuming that the Cabibbo-Kobayashi-Maskawa matrix at the grand unification
scale is the only source of CP violation, complex phases are induced in
parameters of soft supersymmetry breaking at low energies. Chargino one-loop
diagram is found to give the dominant contribution of the order of
$10^{-27}\sim 10^{-29}\:e\cdot$cm for quark EDM, assuming the light chargino
mass and the universal scalar mass to be $50$ GeV and $100$ GeV, respectively.
Therefore the neutron EDM in this class of model is difficult to measure
experimentally. Gluino one-loop diagram also contributes due to the flavor
changing gluino coupling. The transition EDM is found to give dominant
contributions for certain parameter regions.


title: Low- and high-mass components of the photon distribution functions

abstract:
  The structure of the general solution of the inhomogeneous evolution
equations allows the separation of a photon structure function into
perturbative (``anomalous") and non-perturbative contributions. The former part
is fully calculable, and can be identified with the high-mass contributions to
the dispersion integral in the photon mass. Properly normalized ``state"
distributions can be defined, where the $\gamma\to\qqbar$ splitting probability
is factored out. These state distributions are shown to be useful in the
description of the hadronic event properties, and necessary for a proper
eikonalization of jet cross sections. Convenient parametrizations are provided
both for the state and for the full anomalous parton distributions. The
non-perturbative parts of the parton distribution functions of the photon are
identified with the low-mass contributions to the dispersion integral. Their
normalizations, as well as the value of the scale $Q_0$ at which the
perturbative parts vanish, are fixed by approximating the low-mass
contributions by a discrete, finite sum of vector mesons. The shapes of these
hadronic distributions are fitted to the available data on $F_2^\gamma(x,Q^2)$.
Parametrizations are provided for $Q_0=0.6\,$GeV and $Q_0=2\,$GeV, both in the
DIS and the $\overline{\mathrm{MS}}$ factorization schemes. The full
parametrizations are extended towards virtual photons. Finally, the often-used
``FKP-plus-TPC/$2\gamma$" solution for $F_2^\gamma(x,Q^2)$ is commented upon.


title: THE INTERPLAY OF THE K+K- ATOM AND THE f_0(975) RESONANCE

abstract:
  We predict that production of the K+K- atom in pd-3^HeX and similar reactions
exhibits a drastic missing mass spectrum due to the interplay with f_0(975)
resonance. We point out that high precision studies of the K+K- atom may shed a
new light on the nature of f_0(975).


title:
STRING FORMATION IN THE MODEL OF THE STOCHASTIC VACUUM AND CONSISTENCY
  WITH LOW ENERGY THEOREMS

abstract:
  We re-derive and discuss two low energy theorems which relate the potential
of a static quark-antiquark pair with the total energy and action stored in the
flux tube between the sources. In lattice QCD these relations are known as
Michael's sum-rules, but we give an essential correction to one of them. Then
we relate the low energy theorems to the virial theorem for a heavy
quark-antiquark bound state. Finally we compare the results for the flux tube
formation, which have been calculated in the model of the stochastic vacuum,
with the low energy theorems and obtain consistency. From this we conclude that
the model describes the non perturbative gluon dynamics of QCD at a
renormalization scale, where the strong coupling constant is given by $\al_s =
0.57$.


title: An Update on Strong $W_L W_L$ Scattering at the LHC

abstract:
  I summarize an update on our previous study (J. Bagger et al. Phys. Rev. D49,
1246) for a strongly interacting electroweak symmetry breaking sector via
longitudinal vector boson scattering at the 14 TeV Large Hadron Collider. In
the update, the decay mode $ZZ\to \ell^+\ell^- \nu \bar \nu$ and a new
vector-resonance signal via $q\bar q' \to V \to W^+W^-/ W^\pm Z$ are also
included.


title: Implications of Non-universal Soft Masses on Gauge Coupling Unification

abstract:
  We study the gauge coupling unification of the minimal supersymmetric
standard model with non-universal soft scalar and gaugino masses. The
unification scale of the gauge couplings is estimated for non-universal cases.
It is sensitive to the non-universality. It turns out that these cases can be
combined with the assumption of string unification, which leads to a prediction
of $\sin^2 \theta_W(M_Z)$ and $k_1$, the normalisation of the $U(1)_Y$
generator. String unification predicts $k_1=1.3 - 1.4$. These values have
non-trivial implications on string model building. Two-loop corrections are
also calculated. Some of these cases exhibit a large discrepancy between
experiment and string unification. We calculate string threshold corrections to
explain the discrepancy.


title: QCD Corrections to Diboson Production

abstract:
  The QCD radiative corrections to hadronic diboson production are reviewed.
The radiative corrections for $W^{\pm}\gamma$, $Z\gamma$, $ZZ$, $W^+W^-$, and
$W^{\pm} Z$ are discussed. Similarities and differences in the behavior of the
order $\alpha_s$ cross sections for these processes are emphasized.


title:
Nonfactorization in Hadronic Two-body Cabibbo-favored decays of D^0 and
  D^+

abstract:
  With the inclusion of nonfactorized amplitudes in a scheme with $N_c=3$, we
have studied Cabibbo-favored decays of $D^0$ and $D^+$ into two-body hadronic
states involving two isospins in the final state. We have shown that it is
possible to understand the measured branching ratios and determined the sizes
and signs of nonfactorized amplitudes required.


title: BEYOND STANDARD QUANTUM CHROMODYNAMICS

abstract:
  Despite the many empirical successes of QCD, there are a number of intriguing
experimental anomalies that have been observed in heavy flavor hadroproduction,
in measurements of azimuthal correlations in deep inelastic processes, and in
measurements of spin correlations in hadronic reactions. Such phenomena point
to color coherence and multiparton correlations in the hadron wavefunctions and
physics beyond standard leading twist factorization. Two new high precision
tests of QCD and the Standard Model are discussed: classical polarized
photoabsorption sum rules, which are sensitive to anomalous couplings and
composite structure, and commensurate scale relations, which relate physical
observables to each other without scale or scheme ambiguity. The relationship
of anomalous couplings to composite structure is also discussed.


title: NON-UNIVERSAL SUSY BREAKING, HIERARCHY AND SQUARK DEGENERACY

abstract:
  I discuss non-trivial effects in the soft SUSY breaking terms which appear
when one integrates out heavy fields. The effects exist only when the SUSY
breaking terms are non-universal. They may spoil (1) the hierarchy between the
weak and high-energy scales, or (2) degeneracy among the squark masses even in
the presense of a horizontal symmetry. I argue, in the end, that such new
effects may be useful in probing physics at high-energy scales from TeV-scale
experiments.


title: Open Inflation with Arbitrary False Vacuum Mass

abstract:
  We calculate the power spectrum of adiabatic density perturbations in an open
inflationary model in which inflation occurs in two stages. First an epoch of
old inflation creates a large, smooth universe, solving the horizon and
homogeneity problems. Then an open universe emerges through the nucleation of a
single bubble, with constant density hypersurfaces inside the bubble having
constant negative spatial curvature. An epoch of `slow roll' inflation,
shortened to give $\Omega _0<1$ today, occurs within the bubble, which contains
our entire observable universe. In this paper we compute the resulting density
perturbations in the same `new thin wall' approximation used in a previous
paper, but for an arbitrary positive mass of the inflaton field in the false
vacuum.


title: EFFECTS OF SHADOWING IN DOUBLE POMERON EXCHANGE PROCESSES

abstract:
  The effects of shadowing in double Pomeron exchange processes are
investigated within an eikonal approach with a Gaussian input. Damping factors
due to screening are calculated for this process and compared with the factors
obtained for total, elastic and single diffraction cross sections. Our main
conclusion is that counting rate calculations, of various double Pomeron
exchange processes (without screening corrections) such as heavy quark and
Higgs production are reduced by a factor of 5 in the LHC energy range, when
screening corrections are applied.


title: Vector Mesons in Nuclear Medium

abstract:
  We summarize the current theoretical and experimental status of the spectral
change of the vector mesons in dense matter.


title:
QCD Corrections to the $e^+e^-$ Cross Section and the $Z$ Boson Decay
  Rate

abstract:
  QCD corrections to the electron positron annihilation cross-section into
hadrons and to the hadronic $Z$ boson decay rate are reviewed. Formal
developments are introduced in a form particularly suited for practical
applications. These include the operator product expansion, the heavy mass
expansion, the decoupling of heavy quarks and matching conditions. Exact
results for the quark mass depen- dence are presented whenever available, and
formulae valid in the limit of small bottom mass ($m_{b}^2\ll s$) or of large
top mass ($m_{t}^2\gg s$) are presen- ted. The differences between vector and
axial vector induced rates as well the classification of singlet and nonsinglet
rates are discussed. Handy formulae for all contributions are collected and
their numerical relevance is investi- gated. Prescriptions for the separation
of the total rate into partial rates are formulated. The applicability of the
results in the low energy region, relevant for measurements around 10 GeV and
below, is investigated and numerical predictions are collected for this energy
region.


title: On Signals of Quark-Gluon Plasma Freeze-Out

abstract:
  The time-scales of rehadronization are considered for a baryon-free QGP at
RHIC and LHC energies. The non-equilibrium nucleation scenario leads to
mechanical instability of the supercooled QGP phase which then may be suddenly
converted in a timelike deflagration from the supercooled state to a
(super)heated hadronic matter. In a model simulation such a sudden process was
indeed possible and satisfied energy and momentum conservation with
non-decreasing entropy. It is possible to reach a hadronic state frozen out
immediately after the timelike deflagration. If a TD leads to a simultaneous
hadronization and freeze-out, the conditions of a pion-flash are satisfied.
This rehadronization mechanism is signalled by a reduced difference between the
sidewards and outward components of Bose-Einstein correlation functions, in the
observation of the free masses of the resonances in the dilepton spectra and in
a clean strangeness signal of the QGP.


title: STRONG SUPERSYMMETRIC QUANTUM EFFECTS ON THE TOP QUARK WIDTH

abstract:
  We compute the one-loop supersymmetric QCD quantum effects on the width
$\Gamma (t\rightarrow W^{+}\, b)$ of the canonical main decay of the top quark
within the framework of the MSSM. The corrections can be of either sign
depending on whether the stop squark mass is above or below the top quark decay
threshold into stop and gluino $\Gamma (t\rightarrow\tilde{t} \,\tilde{g})$.
For $m_{\tilde{t}}$ above that threshold, the corrections are negative and can
be of the same order (and go in the same direction) as the ordinary QCD
corrections, even for stop and gluino masses of ${\cal O}(100)\,GeV$. Since the
electroweak supersymmetric quantum effects turn out to be also of the same sign
and could be of the same order of magnitude, the total MSSM correction to the
top quark width could potentially result in a rather large ${\cal O}(10-25)\%$
reduction of $\Gamma (t\rightarrow W^{+}\, b)$ far beyond the conventional QCD
expectations.


title: THE POMERON: YESTERDAY, TODAY and TOMORROW

abstract:
  These lectures are the review of the main ideas and approaches to the
structure of the Pomeron. They are divided in three natural parts:
  (i) the brief review of the Reggeon Calculus, which was the first attempt to
build the effective theory of the strong interaction at high energy. In spite
of the fact that this approach turns out to be inconsistent and in lectures we
show why, the Reggeon approach was and is the main source of the terminology
and phenomenology for high energy ``soft" interactions.
  (ii) the detail description of the QCD approach to high energy interaction.
We try to combine the rigorous approach in perturbative QCD with more simple,
intuitive guess based on general properties of QCD to clarify our expectations
and predictions.
  (iii) the outline of my personal opinion what problems will be important in
the future.
  The main reason for the lectures was just the last part to agitate you to
think about this difficult but because of that interesting problem. The motto
of my lectures is {\it `` there is nothing more exciting than to solve a
difficult problem. Pomeron is the one.''}


title: APPLICATIONS OF HIGH-TEMPERATURE FIELD THEORY TO HEAVY-ION COLLISIONS

abstract:
  A recent development in finite temperature field theory, the so-called
Braaten-Pisarski method, and its application to properties of a quark-gluon
plasma, possibly formed in relativistic heavy ion collisions, are reviewed. In
particular parton damping rates, the energy loss of energetic partons,
thermalization times, viscosity, and production and damping rates of hard
photons are discussed.


title:
Single leptoquark production associated with hard photon emission in ep
  collisions at high energies

abstract:
  In this paper we consider single leptoquark resonance production associated
with the emission of a hard photon. We have obtained analytical formulae for
differential and total cross sections for the cases of scalar and vector
leptoquarks. We have found that in reactions with scalar leptoquarks there is
no photon radiation in some directions depending on the leptoquark electric
charge (the radiative amplitude zero - the RAZ effect).
  For vector leptoquarks the exact RAZ is present only in the case of
Yang-Mills coupling. We propose to use the RAZ effect to determine the types of
leptoquarks. We conclude also that this effect opens a possibility to measure
the leptoquark anomalous magnetic moment.


title:
Supersymmetry, Finite Temperature and Gravitino Production in the Early
  Universe

abstract:
  We reconsider post-inflation gravitino production, in the context of hidden
sector supergravity models. We discuss the possible role of supersymmetry
breaking from finite temperature effects in enhancing the rate for gravitino
production and argue that there is no such enhancement. Our conclusion is based
on a simple decoupling argument, which is independent of temperature. We also
characterize the properties of goldstino-like hydrodynamic fluctuations that
arise in supersymmetric models at finite temperature. We show that they cannot
lead to enhanced gravitino emission via infrared divergences. We comment on an
analogy with axion emission from hadronic matter.


title: Wavelet Spectra of JACEE Events

abstract:
  Pseudo-rapidity distributions of two high multiplicity events Ca-C and
Si-AgBr observed by the JACEE are analysed by the wavelet transform. Wavelet
spectra of those events are calculated and compared with the simulation
calculations. The wavelet spectrum of Ca-C event somewhat resembles to that
simulated with the uniform random numbers. That of Si-AgBr event is not
reproduced by simulation calculations with Poisson random numbers, uniform
random numbers, or a p-model.


title:
Do Higher Order Perturbative Corrections Upset |V_{cb}| and |V_{ub}|
  Determined from Semileptonic Widths?

abstract:
  It is shown that large perturbative corrections found previously for
semileptonic beauty and charm decays are associated with using inappropriate
pole masses. The latter, in the perturbative expansion, suffer from the 1/m_Q
infrared renormalon which is absent in the widths, which leads to similar large
corrections in m_Q. Pole masses are neither measured directly in experiment. If
the widths are related to parameters determined in experiment, the overall
impact of the calculated second order corrections becomes strongly suppressed
and leads to less than 1\% change in |V_{cb}| and |V_{ub}|. Even in charm
decays the perturbative corrections appear to be very moderate in the
consistent OPE-compliant treatment. The updated estimate of |V_{cb}| is given,
based on recent accurate determination of m_b and \alpha_s(1 GeV). The
theoretical accuracy of determination of |V_{ub}| from \Gamma_{sl}(b->u)
appears to be good as well.


title: Pseudoscalar glueball and $\eta'$-meson in low-energy QCD expansion

abstract:
  An effective chiral lagrangian of order $p^2$, describing the interaction of
light pseudoscalar (PS) mesons with $\eta'$-meson and PS-glueball, has been
determined taking into consideration the renorm-group requirements imposed by
QCD renormalization. It is shown that the interpolating fields for the lowest
singlet quarkic and gluonic states, $\eta^0$ and $\eta^G$, may be involved into
the effective theory to be renorm-invariant objects not mixing due to QCD
renormalization. It is established that the potential describing the ``mass''
term of the lagrangian does not depend on $\eta^0$. The dependence on $\eta^G$
is permitted only when there is not direct interaction between $\eta^0$ and
$\eta^G$ out of the ``mass'' term without the octet fields contribution. The
peculiarities distinguishing the glueball from excitation over $\eta^0$ have
been considered.


title: Fermionic excitation in quark matter

abstract:
  We discuss the fermionic excitation spectra of the dense QCD and QED plasma
at zero temperature, and analyze the stability of the normal (perturbative)
ground state. The standard re-summed perturbation theory breaks down because
the infrared (IR) divergences show up in the spectra near the Fermi surface. We
employ the effective field theory approach and the renormalization group to
investigate the dynamics near the Fermi surface. Our results indicate that the
dense QCD and QED plasma are non-Fermi-liquids.


title:
SIGNATURES OF CP-VIOLATION IN THE PRESENCE OF MULTIPLE B-PAIR PRODUCTION
  AT HADRON COLLIDER

abstract:
  We calculate the production of 2 b-quark pairs in hadron collisions. Sources
of multiple pairs are multiple interactions and higher order perturbative QCD
mechanisms. We subsequently investigate the competing effects of multiple
b-pair production on measurements of CP-violation: i) the increase in event
rate with multiple b-pair cross sections which may reach values of order 1 barn
in the presence of multiple interactions and ii) the dilution of $b$ versus
$\bar b$ tagging efficiency because of the presence of events with 4
$B$-mesons. The impact of multiple $B$-meson production is small unless the
cross section for producing a single pair exceeds 1~mb. We show that even for
larger values of the cross section the competing effects i) and ii) roughly
compensate so that there is no loss in the precision with which CP-violating
CKM angles can be determined.


title: SURFACE CURRENT-CARRYING DOMAIN WALLS

abstract:
  Domain walls, arising from the spontaneous breaking of a discrete symmetry,
can be coupled to charge carriers. In much the same way as the Witten model for
superconducting cosmic string, an investigation is made here in the case of
$U(1)\times Z_2 \to U(1)$, where a bosonic charge carrier is directly coupled
to the wall-forming Higgs field. All internal quantities, such as the energy
per unit surface and the surface current, are calculated numerically to provide
the first complete analysis of the internal structure of a surface
current-carrying domain wall.


title: CP VIOLATION IN FERMIONIC DECAYS OF HIGGS BOSONS

abstract:
  We demonstrate that decay angle correlations in $\taum\taup$ and $t\anti t$
decay modes could allow a determination of whether or not a neutral Higgs boson
is a CP eigenstate. Sensitivity of the correlations is illustrated in the case
of the $\epem\rta Z \hn$ and $\mupmum\rta \hn$ production processes for a
two-doublet Higgs model with CP-violating neutral sector. A very useful
technique for minimizing `depolarization' factor suppressions of the
correlations is introduced.


title: Electroweak precision observables - an indirect access to the top quark

abstract:
  The role of the top quark in the Standard Model predictions for electroweak
precision observables is reviewed and the implications of the experimental data
for the indirect determination of the top mass range is discussed.


title:
Comparison of the Pade Approximation Method to Perturbative QCD
  Calculations

abstract:
  We present a method of estimating perturbative coefficients in Quantum Field
Theory using Pade Approximants. We test this method on various known QCD
results, and find that the method works very well.


title:
Exponentiation of multiparticle amplitudes in scalar theories. II.
  Universality of the exponent

abstract:
  It has been shown recently that the amplitude of the creation of $n$ real
scalar particles by one virtual boson near $n$--particle threshold exhibits
exponential behavior at $n\sim1/\lambda$. We extend this result to the
processes of multiparticle production at threshold by two virtual bosons. We
find that both the tree--level amplitude and leading--$n$ loop corrections have
the same exponential behavior, with the common exponent for $1\to n$ and $2\to
n$ processes, for various kinematics. This result strongly indicates that the
exponent for multiparticle amplitudes is independent of the initial state and
that there may exist a semiclassical approach to the study of multiparticle
production.


title: A MASTER FORMULA FOR CHIRAL SYMMETRY BREAKING

abstract:
  We derive a master formula for chiral $SU(2)\times SU(2)$ breaking, based on
the Veltman-Bell equations and the Peierls-Dyson relation. Our approach does
not rely on the use of the soft pion limit or an expansion around the chiral
limit, and yields exact results for on-shell pions. Threshold theorems for $\pi
N\rightarrow \pi N$, $\gamma N\rightarrow \pi N$, $\pi N\rightarrow\pi\pi N$,
$\gamma N\rightarrow \gamma\pi N$, $\gamma N\rightarrow \pi\pi N$ and $\pi
N\rightarrow \pi\gamma N$ are recovered, and corrections to them are given. The
reactions $\pi\rightarrow e\nu \gamma$, $\pi\rightarrow e\nu e^+e^-$,
$\gamma\pi\rightarrow \gamma\pi$ and $\gamma\gamma\rightarrow \pi\pi$ are also
discussed. A general formula for $\pi\pi$ scattering and a new one loop
effective action are obtained. The new effective action reproduces the KSFR
relation, and yields specific estimates for the pion polarisabilities. A
detailed comparison with baryon-free chiral perturbation theory to one loop is
made. An extension of our effective action to two loops is outlined.


title: B Mesons

abstract:
  B mesons are bound states of a b quark and a light anti-quark. While the
binding is provided by the strong interaction B mesons can only decay by the
weak interaction. Since the top quark mass is large, B mesons are the only
mesons containing quarks of the third generation and thus their decays provide
a unique opportunity to measure the Cabibbo-Kobayashi-Maskawa (CKM) matrix
elements V_{cb}, V_{ub}, V_{ts}, and V_{td} which describe the couplings of the
third generation of quarks to the lighter quarks.
  We review experimental results on masses, lifetimes and decays of B mesons.
These include measurements of the inclusive production of charmed and
non-charmed mesons and baryons, observations of semileptonic B decays,
B-\bar{B} mixing, B meson lifetimes, measurements of exclusive hadronic final
states with charmed mesons, the search for exclusive hadronic final states
without charmed mesons, the first observation of the decay B\to K^*\gamma which
is described by an electromagnetic penguin diagram and measurement of the
inclusive b\to s \gamma rate. The theoretical implications of these results
will be considered.


title: DISCOVERING THE HIGGS BOSONS OF MINIMAL SUPERSYMMETRY WITH MUONS

abstract:
  The prospects of detecting neutral Higgs bosons in the minimal supersymmetric
model via their decays into muon pairs at the LHC are investigated. The CMS
detector performance is adopted for a realistic study of observability. It is
found that the muon pair decay mode might provide a very promising channel to
search for the neutral Higgs bosons of minimal supersymmetry. This channel will
allow precise mass reconstruction for neutral Higgs bosons.


title: The Foldy-Wouthuysen transformation

abstract:
  The Foldy-Wouthuysen transformation of the Dirac Hamiltonian is generally
taught as simply a mathematical trick that allows one to obtain a two-component
theory in the low-energy limit. It is not often emphasized that the transformed
representation is the only one in which one can take a meaningful *classical
limit*, in terms of particles and antiparticles. We briefly review the history
and physics of this transformation.


title:
Possible Implications of the Atmospheric, the Bugey, and the Los Alamos
  Neutrino Experiments

abstract:
  A combined analysis of the terrestrial neutrino experiments and the
Kamiokande observation of atmospheric neutrino anomaly is performed under the
assumption of the existence of dark-matter-mass neutrinos, as suggested by the
recent Los Alamos experiment. In the three-flavor mixing scheme of neutrinos it
is shown that the constraints from these experiments are so strong that the
patterns of mass hierarchy and flavor mixing of neutrinos are determined almost
uniquely depending upon the interpretation of the atmospheric neutrino anomaly.


title: A perturbative approach to $B$ decays into two $\pi$ mesons

abstract:
  The modified perturbative approach in which transverse degrees of freedom as
well as Sudakov suppressions are taken into account, is applied to $B$ decays
into two $\pi$ mesons. The influence of various model parameters (CKM matrix
elements, $B$ decay constant, mesonic wave functions) on the results as well as
short distance corrections to the weak Hamiltonian are discussed in some
detail. The perturbative contributions to the $B$ decays yield branching ratios
of the order of $10^{-7}\;-\;10^{-6}$ which values are well below the upper
limit for the $\bar{B}^0\to\pi^+\pi^-$ branching ratio as measured by CLEO.


title:
Probing polarized valence quark distributions in $W^{-}$-boson
  production

abstract:
  While EMC-SMC-E142 data sheds new light on the behavior of polarized parton
distributions at small and intermediate $x$, it may be also interesting to
study valence quark polarizations at large $x$, where spectator quark counting
rules and Carlitz-Kaur type models predict different behavior for down quark
polarizations. The article examines the possibility of testing the ratio
$\Delta d_V(x)/d_V(x)$ at $x\to 1$ in the inclusive production of
$W^{-}$-bosons.


title:
Optimization of the nonrelativistic potential model for $b\overline{b}$
  quarkonia

abstract:
  A systematic study of a wide class of nonrelativistic models of
$b\overline{b}$ quarkonia is described. It is found that the potential $V(r) =
0.706380(\sqrt{r} - \frac{0.460442}{r}) + 8.81715$ (all in GeV) with the
$b$-quark mass $m_b = 4.80303$ GeV gives a satisfactory description of the
experimental data below the threshold for strong decays ($ \chi^2/DF = 6.5/7$).
Limitations and implications of this observation are discussed.


title: STUDY OF J/PSI THREE-BODY DECAYS INVOLVING BARYONS

abstract:
  The $J/\Psi$ decay into a baryon pair and a pseudoscalar meson is computed,
for some channels, in lowest order in perturbative QCD, modeling the baryon
with a quark-diquark system. We use a set of parameters that has been proposed
by some authors in order to fit the proton magnetic form factor $G^{p}_{M}$,
the angular distribution of protons in the process $\gamma \gamma \to p
\bar{p}$ and the width of $\eta_{c} \to \gamma \gamma$.


title:
Precise Predictions for the Masses and Couplings in the Minimal
  Supersymmetric Standard Model

abstract:
  We present selected results of our program to determine the masses, gauge
couplings, and Yukawa couplings of the minimal supersymmetric model in a full
one-loop calculation. We focus on the precise prediction of the strong coupling
alpha_s(M_Z) in the context of supersymmetric unification. We discuss the
importance of including the finite corrections and demonstrate that the
leading-logarithmic approximation can significantly underestimate alpha_s(M_Z)
when some superpartner masses are light. We show that if GUT thresholds are
ignored, and the superpartner masses are less than about 500 GeV, the
prediction for alpha_s(M_Z) is quite large. We impose constraints from nucleon
decay experiments and find that minimal SU(5) GUT threshold corrections
increase alpha_s(M_Z) over most of the parameter space. We also consider the
missing-doublet SU(5) model and find that it predicts preferred values for the
strong coupling, even for a very light superpartner spectrum. We briefly
discuss predictions for the bottom-quark mass in the small tan beta region.


title: APPLICATIONS OF EFFECTIVE LAGRANGIANS

abstract:
  The applications of effective lagrangians to the determination of the effects
of physics beyond the Standard Model are briefly described. Emphasis is given
to those effective operators which generate the largest deviations form the
Standard Model; some applications are described. of the paper (or other short
description) [Talk given at "Beyond the Standard Model IV", Lake Tahoe, CA,
Dec. 13-18, 1994]


title:
Contribution of the Sixth Order Effective Chiral Lagrangian to the $\pi
  K$ Scattering at Large $N_c$

abstract:
  Using the method of asymptotic sum rules we estimated the size of $O(m_s
p_\pi^4)$ and $O(m_s^2 p_\pi^2)$ corrections to $\pi K$ scattering amplitude in
large $N_c$ limit. These corrections arise from the sixth order effective
chiral lagrangian (EChL). Our method enables us to estimate the corresponding
terms of the sixth order EChL in leading order of $1/N_c$ expansion in model
independent way. We found that the corrections numerically are suppressed in
spite of naive expectation of 30--35\%. Our estimation gives the value of these
corrections about 5--10\% .


title: ANOMALOUS GAUGE BOSON INTERACTIONS

abstract:
  We discuss the direct measurement of the trilinear vector boson couplings in
present and future collider experiments. The major goals of such experiments
will be the confirmation of the Standard Model (SM) predictions and the search
for signals of new physics. We review our current theoretical understanding of
anomalous trilinear gauge boson self-interactions. If the energy scale of the
new physics is $\sim 1$ TeV, these low energy anomalous couplings are expected
to be no larger than ${\cal O}(10^{-2})$. Constraints from high precision
measurements at LEP and low energy charged and neutral current processes are
critically reviewed.


title: Where are we coming from? What are we? Where are we going?

abstract:
  The Standard Model is the answer to questions 1 and 2, as established by LEP.
Supersymmetry is doubtless the answer to question 3, as may well be established
by the LHC.