title: The Oscillation Probability of GeV Solar Neutrinos of All Active Species

abstract:
  In this paper, I address the oscillation probability of O(GeV) neutrinos of
all active flavours produced inside the Sun and detected at the Earth. Flavours
other than electron-type neutrinos may be produced, for example, by the
annihilation of WIMPs which may be trapped inside the Sun. In the GeV energy
regime, matter effects are important both for the ``1-3'' system and the
``1-2'' system, and for different neutrino mass hierarchies. A numerical scan
of the multidimensional three-flavour parameter space is performed,
``inspired'' by the current experimental situation. One important result is
that, in the three-flavour oscillation case, P{alpha,beta} is different from
P{beta,alpha} for a significant portion of the parameter space, even if there
is no CP-violating phase in the MNS matrix. Furthermore, P{mu,mu} has a
significantly different behaviour from P{tau,tau}, which may affect
expectations for the number of events detected at large neutrino telescopes.


title: Space-time description of the hadron interaction at high energies

abstract:
  This is a classical paper by Vladimir Gribov (1930-97) which has influenced
the understanding of high energy hadron collisions and deep inelastic
scattering for several decades, and is still important today. Gribov's main
assumption - that partons have limited transverse momenta - was later proved to
be satisfied in QCD, modulo logarithmic corrections. However, QCD was just
coming into existence at the time of the lecture, and Gribov used the
super-renormalizable \phi^3 theory to illustrate his points.


title: Scalar Mediated FCNC at the First Muon Collider

abstract:
  In the most general two-Higgs doublet model (generally referred to as Model
III), tree level flavor changing neutral couplings exist. It has been noted
that the most natural value for such a coupling is of the order of the
geometric mean of the Yukawa couplings of the two fermions. Bounds on those
couplings that involve the second and third generations, from $\tau,B,D$ and
$\mu$ physics, are very weak and are not sensitive to this "natural" value. In
this paper, it is pointed out that the process \mu\mu ---> \mu\tau, at a muon
collider tuned to the scalar resonance, will easily reach this sensitivity if
the scalar mass is below 140 GeV. Hundreds of events are expected for an
integrated luminosity of an inverse femtobarn, and there appears to be no
background. Failure to observe this process, if the scalar is below 140 GeV,
would effectively rule out Model III.


title:
Thermalization of Quantum Fields from Time-Reversal Invariant Evolution
  Equations

abstract:
  We study the time evolution of correlation functions in closed quantum
systems for nonequilibrium ensembles of initial conditions. For a scalar
quantum field theory we show that generic time-reversal invariant evolutions
approach equilibrium at large times. The calculation provides a first
principles justification of Boltzmann's conjecture that the large-time behavior
of isolated macroscopic systems can be described by thermal ensemble averages.


title: The anapole form factor of the nucleon

abstract:
  The anapole form factor of the nucleon is calculated in chiral perturbation
theory in leading order. To this order, the form factor originates from the
pion cloud, and is proportional to the non-derivative parity-violating
pion-nucleon coupling. The momentum dependence of the form factor - and in
particular, its radius - is completely determined by the pion mass.


title:
Report of the Beyond the MSSM Subgroup for the Tevatron Run II
  SUSY/Higgs Workshop

abstract:
  There are many low-energy models of supersymmetry breaking parameters which
are motivated by theoretical and experimental considerations. Here, we discuss
some of the lesser-known theories of low-energy supersymmetry, and outline
their phenomenological consequences. In some cases, these theories have more
gauge symmetry or particle content than the Minimal Supersymmetric Standard
Model. In other cases, the parameters of the Lagrangian are unusual compared to
commonly accepted norms (e.g., Wino LSP, heavy gluino LSP, light gluino, etc.).
The phenomenology of supersymmetry varies greatly between the different models.
Correspondingly, particular aspects of the detectors assume greater or lesser
importance. Detection of supersymmetry and the determination of all parameters
may well depend upon having the widest possible view of supersymmetry
phenomenology.


title: Deconfining by Winding: The Magnetic Monopole Vacua at High Temperatures

abstract:
  Characterizing the vacuum of a thermalized SU(3) Yang-Mills theory in the
dual Ginzburg-Landau description, the possibility of topologically nontrivial,
classical monopole fields in the deconfining phase is explored. These fields
are assumed to be Bogomoln'yi-Prasad-Sommerfield (BPS) saturated solutions
along the compact, euclidean time dimension. A corresponding, gauge invariant
monopole interaction is constructed. The model passes first tests. In
particular, a reasonable value for the critical temperature is obtained, and
the partial persistence of nonperturbative features in the deconfining phase of
SU(3) Yang-Mills theory, as it is measured on the lattice, follows naturally.


title: Bulk Higgs Boson Decays in Brane Localized Gravity

abstract:
  We embed the Standard Model in the Randall-Sundrum model of 5 dimensional
brane localized gravity. The SM gauge and chiral fermion fields are restricted
on the 4D visible brane whereas the Higgs and the right-handed neutrino are
assumed to be 5D bulk fields. We calculate the effective couplings of the
lowest mass Higgs field to the SM fermions and to the gauge bosons and find
that the couplings are enhanced. Furthermore, the invisible decay width of a
bulk Higgs of mass 150 GeV is shown to be large.


title: Two-Neutrino Five-Photon Scattering at Low Energies

abstract:
  We extend earlier constructions of the effective action for neutrino-photon
scattering, using the connection between low-energy neutrino-photon and
photon-photon scattering together with the known effective Lagrangian
describing low-energy photon scattering in QED. We use this effective action to
calculate analytic expressions for the low-energy cross section for the
(unpolarised) processes $\nu \nubar \to 5 \gamma$, $\nu \gamma \to \nu + 4
\gamma$ and $\gamma \gamma \to \nu \nubar + 3 \gamma$. As a byproduct we derive
compact expressions for the $N$-body phase-space integrals for massless
particles, including those having non-trivial tensor-structure.


title: Monte Carlo Generators and the CCFM Equation

abstract:
  We discuss three implementations of the CCFM evolution equations in event
generator programs. We find that some of them are able to describe observables
such as forward jet rates in DIS at HERA, but only if the so-called consistency
constraint is removed. We also find that these results are sensitive to the
treatment of non-singular terms in the gluon splitting function.


title: Proposal for a Very Forward Proton Spectrometer in H1 after 2000

abstract:
  A new, very forward proton spectrometer (VFPS) with large acceptance is
proposed to be installed in the proton beam of the H1 experiment after the
luminosity upgrade in the year 2000. The spectrometer, located at 220 m
downstream of the interaction point is based on the Roman Pot technique and
consists of two stations situated in the cold section of the proton beam line.
Physics motivations and a brief description of the proton spectrometer are
presented.


title: Inflation and Supersymmetry Breaking

abstract:
  We study the connection between inflation and supersymmetry breaking in the
context of an O'Raifeartaigh model which can account for both hybrid inflation
and a true vacuum where supersymmetry is spontaneously broken. For a weakly
coupled inflaton field, the dynamics during the inflationary phase can be
determined by the supersymmetry breaking scale $M_S\sim 10^{10}$ GeV, even if
$H_I >> m_{3/2}$. The spectrum of density fluctuations is then almost scale
invariant, with a spectral index $n-1={\cal O}(M_G^2/M_P^2)$. The mass
parameter $M_G$ of the O'Raifeartaigh model is determined by the COBE
normalization for the cosmic microwave background to be the grand unification
scale, $M_G \sim 10^{16}$ GeV.


title: Chiral symmetry breaking in the Wegner-Houghton approach

abstract:
  The Wegner-Houghton formulation of the exact renormalization group evolution
equation is used in order to study the chiral symmetry breaking of the linear
sigma model coupled to an isospin doublet of quarks. A numerical investigation
for a particular truncation of the equation which includes the scalar field
renormalization function is presented.


title: QCD and the Structure of the Nucleon in Electron Scattering

abstract:
  The internal structure of the nucleon is discussed within the context of QCD.
Recent progress in understanding the distribution of flavor and spin in the
nucleon is reviewed, and prospects for extending our knowledge of nucleon
structure in electron scattering experiments at modern facilities such as
Jefferson Lab are outlined.


title:
Neutrinos from Stellar Collapse: Comparison of the effects of three and
  four flavour mixings

abstract:
  We study the effect of non-vanishing masses and mixings among neutrino
flavours on the detection of neutrinos from stellar collapse by a water
Cerenkov detector. We consider a frame-work in which there are four neutrino
flavours, including a sterile neutrino, whose mass squared differences and
mixings are constrained by the present understanding of solar, atmospheric and
laboratory neutrino detection. We also include the effects of high density
matter within the supernova core. Unlike in the three flavour scenario, we find
that the number of events due to the dominant process involving
electron-antineutrinos changes dramatically for some allowed mixing parameters.
Furthermore, contributions from charged-current scattering off oxygen nuclei in
the detector can be considerably enhanced due to flavour mixing. We also
present a comparison between the two possible scenarios, namely, when only
three active neutrino flavours are present and when they are accompanied by a
fourth sterile neutrino.


title: Electromagnetism in nonleptonic weak interactions

abstract:
  We construct a low-energy effective field theory that permits the complete
treatment of isospin-breaking effects in nonleptonic weak interactions to
next-to-leading order. To this end, we enlarge the chiral Lagrangian describing
strong and Delta S=1 weak interactions by including electromagnetic terms with
the photon as additional dynamical degree of freedom. The complete and minimal
list of local terms at next-to-leading order is given. We perform the one-loop
renormalization at the level of the generating functional and specialize to K
-> pi pi decays.


title:
Leptogenesis from Neutralino Decay with Nonholomorphic R-Parity
  Violation

abstract:
  In supersymmetric models with lepton-number violation, hence also R-parity
violation, it is easy to have realistic neutrino masses, but then leptogenesis
becomes difficult to achieve. After explaining the general problems involved,
we study the details of a model which escapes these constraints and generates a
lepton asymmetry, which gets converted into the present observed baryon
asymmetry of the Universe through the electroweak sphalerons. This model
requires the presence of certain nonholomorphic R-parity violating terms. For
completeness we also present the most general R-parity violating Lagrangian
with soft nonholomorphic terms and study their consequences for the
charged-scalar mass matrix. New contributions to neutrino masses in this
scenario are discussed.


title: Low-Energy Limits of Theories With Two Supersymmetries

abstract:
  Given its non-renormalization properties, low-energy supersymmetry provides
an attractive framework for extending the Standard Model and for resolving the
hierarchy problem. Models with softly broken N =1 supersymmetry were
extensively studied and are phenomenologically successful. However, it could be
that an extended N = 2 supersymmetry survives to low energies, as suggested by
various constructions. We examine the phenomenological viability and
implications of such a scenario. We show that consistent chiral fermion mass
generation emerges in N=2 theories, which are vectorial, as a result of
supersymmetry breaking at low energies. A rich mirror quark and lepton spectrum
near the weak scale with model-dependent decay modes is predicted. A Z_{2}
mirror parity is shown to play an important role in determining the
phenomenology of the models. It leads, if conserved, to a new stable particle,
the LMP. Consistency of the N=2 framework and its unique spectrum with
electroweak precision data is considered, and the discovery potential in the
next generation of hadron collider experiments is stressed. Mirror quark pair
production provides the most promising discovery channel. Higgs searches are
also discussed and it is shown that there is no upper bound on the prediction
for the Higgs boson mass in the framework of low-energy supersymmetry breaking,
in general, and in the N=2 framework, in particular. Possible N = 2
realizations of flavor symmetries and of neutrino masses are also discussed.


title:
Supersymmetric Effects on Isospin Symmetry Breaking and Direct CP
  Violation in $B \to \rho \gamma$

abstract:
  We argue that one can search for physics beyond the standard model through
measurements of the isospin-violating quantity $\Delta^{-0} \equiv \Gamma(B^-
\to \rho^- \gamma)/2\Gamma(B^0 \to \rho^0 \gamma)-1$, its charge conjugate
$\Delta^{+0}$, and direct CP violation in the partial decay rates of $B^\pm \to
\rho^\pm \gamma$. We illustrate this by working out theoretical profiles of the
charge-conjugate averaged ratio $\Delta \equiv {1 \over 2}(\Delta^{+0}
+\Delta^{-0})$ and the CP asymmetry $A_{CP}(B^\pm \to \rho^\pm \gamma)$ in the
standard model and in some variants of the minimal supersymmetric standard
model. We find that chargino contributions in the large $\tan \beta$ region may
modify the magnitudes and flip the signs of $\Delta$ and $A_{CP}(B^\pm \to
\rho^\pm \gamma)$ compared to their standard-model values, providing an
unmistakeable signature of supersymmetry.


title:
Soft parton resummation in the current region of semi-inclusive deep
  inelastic scattering

abstract:
  We discuss resummation of large logarithmic terms that appear in the
cross-section of semi-inclusive DIS in the case when the final-state hadron
follows the direction of the incoming electroweak vector boson in the c.m.
frame of the vector boson and the initial-state proton.


title: Development of the electroweak phase transition and baryogenesis

abstract:
  We investigate the evolution of the electroweak phase transition, using a
one-Higgs effective potential that can be regarded as an approximation for the
Minimal Supersymmetric Standard Model. The phase transition occurs in a small
interval around a temperature T_t below the critical one. We calculate this
temperature as a function of the parameters of the potential and of a damping
coefficient related to the viscosity of the plasma. The parameters that are
relevant for baryogenesis, such as the velocity and thickness of the walls of
bubbles and the value of the Higgs field inside them, change significantly in
the range of temperatures where the first-order phase transition can occur.
However, we find that in the likely interval for T_t there is no significant
variation of these parameters. Furthermore, the temperature T_t is in general
not far below the temperature at which bubbles begin to nucleate.


title: CP Violation in $\Lambda$ to p $\pi^-$: SM vs New Physics

abstract:
  I discuss CP violation in $\Lambda$ to p $\pi^-$ comparing the standard model
expectations with what could happen in new physics scenarios. I point out that
Fermilab experiment E871 is sensitive to some of these scenarios.


title: The glueball spectrum

abstract:
  Mass ratios of glueballs predicted by the latest Lattice QCD calculations in
the quenched approximation agree well with four prime experimental candidates.


title: The Future of Particle Physics

abstract:
  After a very brief review of twentieth century elementary particle physics,
prospects for the next century are discussed. First and most important are
technological limits of opportunities; next, the future experimental program,
and finally the status of the theory, in particular its limitations as well as
its opportunities.


title:
The Nucleon Anapole Form Factor in Chiral Perturbation Theory to
  Sub-leading Order

abstract:
  The anapole form factor of the nucleon is calculated in chiral perturbation
theory to sub-leading order. This is the lowest order in which the isovector
anapole form factor does not vanish. The anapole moment depends on counterterms
that reflect short-range dynamics, but the momentum dependence or the form
factor is determined by pion loops in terms of parameters that could in
principle be fixed from other processes. If these parameters are assumed to
have natural size, the sub-leading corrections do not exceed ~ 30% at momentum
Q ~ 300 MeV.


title: Single Stop Production at Hadron Colliders

abstract:
  We analyze the production of a single top squark at hadron colliders:
ppbar/pp -> \tilde{t}_1 + X. The total cross sections and the transverse
momentum distributions are presented in next-to-leading order QCD. The
higher-order corrections render the predictions theoretically stable with
respect to variations of the factorization and renormalization scales. The
transverse momentum distribution is resummed to estimate effects of the small
transverse momentum regime on possible analyses. Since the corrections increase
the cross sections and reduce the theoretical uncertainty, the discovery range
for these particles is extended in the refined analysis.


title:
Velocity distributions and annual-modulation signatures of
  weakly-interacting massive particles

abstract:
  An annual modulation in the event rate of the NaI detector of the DAMA
collaboration has been used to infer the existence of particle dark matter in
the Galactic halo. Bounds on the WIMP mass and WIMP-nucleon cross section have
been derived. These analyses have assumed that the local dark-matter velocity
distribution is either isotropic or has some bulk rotation. Here we consider
the effects of possible structure in the WIMP velocity distribution on the
annual-modulation amplitude. We show that if we allow for a locally anisotropic
velocity dispersion tensor, the interpretation of direct detection experiments
could be altered significantly. We also show that uncertainties in the velocity
distribution that arise from uncertainties in the radial density profile are
less important if the velocity dispersion is assumed to be isotropic.


title: The unintegrated gluon distribution from the CCFM equation

abstract:
  The gluon distribution f(x, k_t^2,mu^2), unintegrated over the transverse
momentum k_t of the gluon, satisfies the angular-ordered CCFM equation which
interlocks the dependence on the scale k_t with the scale \mu of the probe. We
show how, to leading logarithmic accuracy, the equation can be simplified to a
single scale problem. In particular we demonstrate how to determine the
two-scale unintegrated distribution f(x,k_t^2,mu^2) from knowledge of the
integrated gluon obtained from a unified scheme embodying both BFKL and DGLAP
evolution.


title: Universal quark-lepton mixing and determination of neutrino masses

abstract:
  If three right-handed neutrinos are added to the Standard Model, then, for
the three known generations, there are six quarks and six leptons. It is then
natural to assume that the symmetry considerations that have been applied to
the quark matrices are also valid for the lepton mass matrices. Under this
assumption, the solar and atmospheric neutrino data can be used to determine
the individual neutrino masses. Three minima have been found, using the chi^2
fit, and, from these minima, it is determined that the mass of the lightest
neutrino is 1.3\times10^-3 eV, that of the next heavier neutrino is
1.3\times10^-2 eV, while the mass of the heaviest neutrino is 3.4\times10^-2,
5.8\times10^-2 or 9.4\times10^-2 eV.


title: Relativistic quark-antiquark potential and heavy quarkonium mass spectra

abstract:
  A general approach to accounting for retardation effects in the long-range
(confining) part of the quark-antiquark potential is presented. The charmonium
and bottomonium mass spectra are calculated with the systematic account of
relativistic and retardation effects and the one-loop radiative corrections. A
good fit to available experimental data on the mass spectra is obtained.


title: Exclusive semileptonic B decays to excited D mesons

abstract:
  Exclusive semileptonic B decays to orbitally and radially excited charmed
mesons are investigated in the first order of the heavy quark expansion. The
emerging leading and subleading Isgur-Wise functions are calculated in the
framework of the relativistic quark model. It is found that both relativistic
and the 1/m_Q corrections play an important role and substantially modify
results. An interesting interplay between different corrections is observed.


title: Antimatter from supersymmetric dark matter

abstract:
  We propose low-energy antideuterons in cosmic rays as a new possible
signature for indirect detection of supersymmetric dark matter.
  Since the energy spectrum of the antiproton secondary component is still
spoilt by considerable theoretical uncertainties, looking for low-energy
antideuterons seems a plausible alternative.
  We apply our calculation to the AMS experiment, when mounted on the
International Spatial Station. If a few low-energy antideuterons will be
discovered by AMS, this should be seriously taken as a clue for the existence
of relic, massive neutralinos in the dark halo of our Galaxy.


title: Heavy-Meson Observables via Dyson-Schwinger Equations

abstract:
  We summarise a Dyson-Schwinger-equation-based calculation of an extensive
range of light- and heavy-meson observables, characterised by heavy-meson
leptonic decays, semileptonic heavy-to-heavy and heavy-to-light transitions,
radiative and strong decays, and the rare flavour-changing neutral-current
process. In the calculation the heavy-quark mass functions are approximated by
constants, interpreted as their constituent mass.


title: Theory and Phenomenology of Type I strings and M-theory

abstract:
  The physical motivations and the basic construction rules for Type I strings
and M-theory compactifications are reviewed in light of the recent
developments. The first part contains the basic theoretical ingredients needed
for building four-dimensional supersymmetric models, models with broken
supersymmetry and for computing low-energy actions and quantum corrections to
them. The second part contains some phenomenological applications to brane
world scenarios with low values of the string scale and large extra dimensions.


title:
Radial Excitations of low-lying Baryons and the Structure of the Z^+
  Penta-QuarK

abstract:
  Within the collective quantization scheme for chiral solitons we discuss
states in higher dimensional representations of flavor SU(3) and their relation
to radially excited states in the octet. We also consider states which do not
have counterparts of the same quantum numbers in the octet or decuplet and
cannot be built from three quarks. We focus on the Z^+ penta-quark, presumably
the lightest such state, by estimating its mass and decay width.


title: Field distributions in heavy mesons and baryons

abstract:
  Field distributions generated by static quark-antiquark and QQQ sources are
calculated analytically in the framework of the Field Correlator Method (FCM)
using Gaussian (bilocal) correlator. In both cases the string consists mostly
of longitudinal color electric field, while transverse electric field
contributes locally less then 3%, in agreement with earlier lattice studies. In
the QQQ case the profile of the Y shape was calculated for the first time and
found to have a complicated structure with a deep well at the string junction
position. Possible consequences of this form for the baryon structure are
discussed.


title: Error propagation in QCD fits

abstract:
  The parton momentum density distributions of the proton were obtained from a
NLO QCD analysis of HERA and fixed target structure function data. The
resulting parton distribution set includes the full information on errors and
correlations.


title: Soft gluon resummation for shape variable distributions in DIS

abstract:
  We discuss the procedure to resum large logarithms to all orders for DIS
event shape variable distributions.
  Results are described for two variants of the thrust variable, both defined
wrt the boson axis in the current hemisphere of the Breit frame, but with
different normalisations.


title: Results on Diffraction at HERA and Tevatron

abstract:
  Recent results on diffraction at HERA, from the H1 and ZEUS Collaborations,
and at Tevatron, from the CDF and D0 Collaborations, are reviewed. The
measurement of the diffractive structure function at HERA is presented, and the
pomeron structure function is extracted from QCD fits. Diffractive dijet
production is given as an example analysis of the diffractive final state.
These analysis are consistent with a leading gluon partonic structure for the
pomeron. Hard single diffraction, double diffraction and double pomeron
exchange processes are studied at the Tevatron and complement the studies
performed at HERA. Finally, HERA results on the diffractive (exclusive)
production of a vector particle, either a vector meson or a photon, are
presented and compared to models based on perturbative QCD.


title: Leptoquarks and Contact Interactions from a Global Analysis

abstract:
  Data from HERA, LEP and the Tevatron, as well as from low energy experiments
are used to constrain the scale of possible electron-quark contact
interactions. Some models are found to describe the existing experimental data
much better than the Standard Model. The possibility of scalar or vector
leptoquark contribution is studied using the Buchmuller-Ruckl-Wyler effective
model. Increase in the global probability observed for scenarios including S_1
or ~V_o leptoquark production/exchange corresponds to more than a 3 sigma
effect. Assuming that a real leptoquark signal is observed, calculated is an
allowed region in the coupling-mass plane.


title: Small x behaviour of parton distributions

abstract:
  We investigate the Q^2 evolution of parton distributions at small x values,
recently obtained in the case of soft initial conditions. The results are in
excellent agreement with deep inelastic scattering experimental data from HERA.


title: Does LEP prefer the NMSSM?

abstract:
  We study the naturalness of electroweak symmetry breaking and baryogenesis in
the next-to-minimal supersymmetric standard model (NMSSM). Our study is
motivated by the recent LEP bounds on the Higgs boson mass which severely
constrains the low \tan\beta region of the minimal supersymmetric standard
model (MSSM). We show that the low \tan \beta region of the NMSSM is clearly
favoured over the MSSM with regard to the physical Higgs boson mass,
fine-tuning, and electroweak baryogenesis.


title: Prompt Photon Production in Polarized Hadron Collisions

abstract:
  We consider spin asymmetries for prompt photon production in collisions of
longitudinally polarized hadrons. This reaction will be a key tool at the
BNL-RHIC pp collider for determining the gluon spin density in a polarized
proton. We study the effects of QCD corrections, such as all-order soft-gluon
`threshold' resummations.


title: Sudden Hadronization in Relativistic Nuclear Collisions

abstract:
  We formulate and study a mechanical instability criterion for sudden
hadronization of dense matter fireballs formed in 158A GeV Pb--Pb collisions.
Considering properties of quark-gluon matter and hadron gas we obtain the phase
boundary between these two phases and demonstrate that the required deep QGP
supercooling prior to sudden hadronization has occurred.


title:
Event-by-event fluctuations of the charged particle ratio from
  non-equilibrium transport theory

abstract:
  The event by event fluctuations of the ratio of positively to negatively
charged hadrons are predicted within the UrQMD model. Corrections for finite
acceptance and finite net charge are derived. These corrections are relevant to
compare experimental data and transport model results to previous predictions.
The calculated fluctuations at RHIC and SPS energies are shown to be compatible
with a hadron gas. Thus, deviating by a factor of 3 from the predictions for a
thermalized quark-gluon plasma.


title: Monopoles, Axions and Intermediate Mass Dark Matter

abstract:
  We present a solution to the cosmological problem encountered in
(supersymmetric) grand unified theories due to copious monopole production at
the end of hybrid inflation. By employing thermal inflation ``driven'' by the
U(1) axion symmetry, the superheavy monopole flux can be naturally suppressed
to values that should be accessible to dedicated large scale experiments. The
U(1) axion symmetry also helps generate the right magnitude for the mu term of
the minimal supersymmetric standard model. An important by-product is the
predicted existence of stable or very long-living fermions possessing
intermediate scale masses of order 10^{12} GeV. Their presence is required for
implementing thermal inflation, and their stability is due to a Z_2 symmetry.
They may constitute a sizable fraction of cold dark matter, and possibly help
explain the ultra-high energy cosmic ray events. The rest of cold dark matter
may consist of axions. Although our discussion is carried out within the
framework of supersymmetric SU(4)_c x SU(2)_L x SU(2)_R, it can be extended to
other grand unified gauge groups such as SU(3)_c x SU(3)_L x SU(3)_R or SO(10).


title: Current Issues In Quarkonium Production

abstract:
  As a stringent test of the nonrelativistic QCD factorization approach for
inclusive heavy-quarkonium production in high-energy hadron collision, the
polarized heavy-quarkonium production at the Tevatron is discussed. The
polarization of prompt J/psi at the Tevatron is predicted within the
nonrelativistic QCD factorization framework. The contribution from radiative
decays of P-wave charmonium states decreases, but does not eliminate, the
transverse polarization at large transverse momentum. The prediction agrees
with measurements from the CDF collaboration at intermediate values of p_T, but
disagrees at the large values of p_T measured. Recent preliminary data of heavy
quarkonia from CDF and theoretical/experimental prospects related to the Run II
heavy quarkonium physics are also discussed.


title: Noncyclic geometric phase for neutrino oscillation

abstract:
  We provide explicit formulae for the noncyclic geometric phases or
Pancharatnam phases of neutrino oscillations. Since Pancharatnam phase is a
generalization of the Berry phase, our results generalize the previous findings
for Berry phase in a recent paper [Phys. Lett. B, 466 (1999) 262]. Unlike the
Berry phase, the noncyclic geometric phase offers distinctive advantage in
terms of measurement and prediction. In particular, for three-flavor mixing,
our explicit formula offers an alternative means of determining the
CP-violating phase. Our results can also be extended easily to explore
geometric phase associated with neutron-antineutron oscillations.


title: Quark-Gluon Plasma as a Condensate of Z(3) Wilson Lines

abstract:
  Effective theories for the thermal Wilson line are constructed in an SU(N)
gauge theory at nonzero temperature. I propose that the order of the
deconfining phase transition for Z(N) Wilson lines is governed by the behavior
of SU(N) Wilson lines. In a mean field theory, the free energy in the
deconfined phase is controlled by the condensate for Z(N) Wilson lines.
Numerical simulations on the lattice, and the mean field theory for Z(3) Wilson
lines, suggest that about any finite temperature transition in QCD, the
dominant correlation length increases by a large, uniform factor, of order
five.


title:
New shapes of light-cone distributions of the transversely polarized
  \rho-mesons

abstract:
  We re-analyze the leading twist light-cone distributions for transversely
polarized \rho-, \rho'- and b_1-mesons in the framework of QCD sum rules with
nonlocal condensates. Using different kinds of sum rules to obtain reliable
predictions, we estimate the 2-, 4-, 6- and 8-th moments for transversely
polarized \rho- and \rho'-meson distributions and re-estimate tensor couplings
f^T_{\rho,\rho',b_1}. We stress that the results of standard sum rules also
support our estimation of the second moment of the transversely polarized
\rho-meson distribution. New models for light-cone distributions of these
mesons are constructed. Phenomenological consequences from these distributions
are briefly discussed. Our results are compared with those found by Ball and
Braun (1996), and the latter is shown to be incomplete.


title: Extraction of skewed parton distributions

abstract:
  Skewed parton distributions contain new non-perturbative information about
hadronic states. Thus, their extraction from experimental data is an important
goal. Properties and models for skewed parton distributions as well as their
extraction, based on perturbative leading-order results, are shortly reviewed.


title:
pi <---> K Meson Vacuum Transitions (Oscillations) in Diagram Approach
  in the Model of Dynamical Analogy of the Cabibbo-Kobayashi-Maskawa Matrices

abstract:
  The elements of the theory of vacuum oscillations and the model of dynamical
expansion of the theory of weak interactions works at the tree level, i.e. the
model of dynamical analogy of Cabibbo-Kobayashi- Maskawa matrices and its
further development, are given. It is shown that the quarks and massive vector
bosons must be structural and these structural particles (subparticles) must
interact to generate quark and vector boson masses. In this case the problem of
singularity cancellations does not arise in this model. It is also shown that,
for self consistency of the theory, the weak decays of $K$ mesons must go
through massive vector boson $B$ but not $W$ boson. In the framework of this
model the probability of $\pi \leftrightarrow K$ transitions (oscillations) in
the diagram approach is computed. These transitions are virtual since masses of
$\pi$ and $K$ mesons differ considerably. These transitions (oscillations) can
be registered through $K$ decays after transitions of virtual $K$ mesons to
their own mass shell by using their quasielastic strong interactions.


title: The Scale Dependence of Inclusive ep Scattering in the Resonance Region

abstract:
  We examine the scale dependence in the resonance region of inclusive ep
scattering. In particular we discuss the invariants other than Q^2, which have
been proposed as a scale for pQCD evolution in a kinematical regime where both
infrared singularities and power corrections are expected to be largest. We
show that the region where most of the present data are available, can be
described using NLO pQCD evolution at fixed invariant mass, W^2, plus a leading
order power correction term. We find that the coefficient of the power
correction at W^2 < 4 GeV^2 is relatively small, i.e. comparable in size to the
one obtained in the large W^2 region.


title:
Cosmic rays and TeV photons as probes of quantum properties of
  space-time

abstract:
  It has been recently observed that small violations of Lorentz invariance, of
a type which may arise in quantum gravity, could explain both the observations
of cosmic rays above the GZK cutoff and the observations of 20-TeV gamma rays
from Markarian 501. We show here that different pictures of the short-distance
structure of space-time would lead to different manifestations of
Lorentz-invariance violation. Specifically, the deformation of Lorentz
invariance needed to resolve these observational paradoxes can only arise
within commutative short-distance pictures of space-time. In noncommutative
space-times there is no anomalous effect, at least at leading order. Also
exploiting the fact that arrival-time delays between high energy photons with
different energies would arise in both the commutative and the noncommutative
Lorentz-violation pictures, we describe an experimental programme, based on
time-of-arrival analysis of high energy photons and searches of violations of
GZK and TeV-photon limits, which could discriminate between alternative
scenarios of Lorentz-invariance breakdown and could provide and unexpected
window on the (quantum) nature of space-time at very short distances.


title: Solving the Gravitino Problem by Axino

abstract:
  In a large class of supersymmetric (SUSY) axion model the mass of axino
$\axino$ (a fermionic superpartner of the axion) is predicted as $m_{\axino}
\lesssim {\cal O}(1)$ keV. Thus, the axino is the lightest SUSY particle (LSP).
We pointed out that such a light axino provides a natural solution to the
gravitino problem, if the gravitino is the next LSP. We derive a constraint on
the reheating temperature $T_R$ of inflation, $T_R \lesssim 10^{15}$ GeV for
the gravitino mass $m_{3/2} \simeq 100$ GeV, which is much weaker than that
obtained in the minimal SUSY standard model.


title: Polarized Structure Functions g_2 (x) in the Chiral Quark Soliton Model

abstract:
  The spin-dependent structure functions g_2 (x, Q^2) are investigated within
the framework of the chiral quark soliton model. It turns out that the twist-3
part of g_2 (x, Q^2) gives nonnegligible contributions to the total
distributions at the energy scale of Q^2 = 5 {GeV}^2 but mainly in the smaller
x region only, so that the corresponding third moments \int_0^1 x^2 \bar{g}_2
(x, Q^2) dx are pretty small for both of the proton and neutron in conformity
with the recent E155 data.


title: Mikheyev-Smirnov-Wolfenstein Effect for Linear Electron Density

abstract:
  When the electron density is a linear function of distance, it is known that
the MSW equations for two neutrino species can be solved in terms of known
functions. It is shown here that more generally, for any number of neutrino
species, these MSW equations can be solved exactly in terms of single
integrals. While these integrals cannot be expressed in terms of known
functions, some of their simple properties are obtained. Application to the
solar neutrino problem is briefly discussed.


title:
The general QCD parametrization and the large N(c) description:Some
  remarks

abstract:
  Stimulated by a recent paper by Buchmann and Lebed,a comparison is presented
of the two methods mentioned in the title for treating hadron properties in
QCD.Doubts arise on the equivalence of the large N(c) description to real
QCD.[PACS:12.38.Aw;11.15.Pg;12.40.Yx;13.40.Dk]


title: Instantons in Deep-Inelastic Scattering

abstract:
  In view of the new (preliminary) search results for instanton-induced events
at HERA from the H1 collaboration, we present a brief discussion of
(controllable) theoretical uncertainties, both in the event topology and the
calculated rate.


title:
New shapes of the rho-meson light-cone distribution amplitudes: how can
  they influence the B --> rho e nu decay form factors

abstract:
  We present new models of the rho-meson leading-twist light-cone distribution
amplitudes based on the QCD sum rule approach with nonlocal condensates. Their
shapes differ noticeably from that known in the literature. The
phenomenological consequences for physically important process B --> rho e nu
are discussed in the framework of the light-cone sum rules. The results are
compared with those found recently by P.Ball and V.M.Braun (1997).


title:
A Study on the Non-perturbative Existence of Yang-Mills Theories with
  Large Extra Dimensions

abstract:
  Pure lattice SU(2) Yang-Mills theory in five dimensions is considered, where
an extra dimension is compactified on a circle. Monte-Carlo simulations
indicate that the theory possesses a continuum limit with a non-vanishing
string tension if the compactification radius is smaller than a certain value
$R_M$ which is $O(1/10)$ of the inverse of the square root of the string
tension. We verify non-perturbatively the power-law running of gauge coupling
constant. Our method can be applied to the investigation of continuum limits in
other higher-dimensional gauge theories.


title: QCD Analysis of Structure Functions of Real and Virtual Photons

abstract:
  Parameter-free and perturbatively stable leading order (LO) and
next-to-leading order (NLO) parton densities for real and virtual photons are
presented.


title: Quark combinatorics for production ratios in hadronic Z^0 decays

abstract:
  Model independent verification of the quark combinatorics rules, which govern
the ratios of the yields of secondaries, is presented for jet processes.
Because of a large number of produced resonances in the hadron jets, a test of
the quark combinatorics rules is hardly possible in the central region,
x_{hadron} < 0.2. However, a model-independent verification is plausible at
x_{hadron} \sim 1. It is shown that for the large x_{hadron} kinematical region
the quark combinatorial relations are in a reasonable agreement with data for
\rho^0/\pi^0 and p/\pi^+ ratios.


title:
Evidence for the absence of regularization corrections to the
  partial-wave renormalization procedure in one-loop self energy calculations
  in external fields

abstract:
  The equivalence of the covariant renormalization and the partial-wave
renormaliz ation (PWR) approach is proven explicitly for the one-loop
self-energy correction (SE) of a bound electron state in the presence of
external perturbation potentials. No spurious correctio n terms to the
noncovariant PWR scheme are generated for Coulomb-type screening potentia ls
and for external magnetic fields. It is shown that in numerical calculations of
the SE with Coulombic perturbation potential spurious terms result from an
improper treatment of the unphysical high-energy contribution. A method for
performing the PWR utilizing the relativistic B-spline approach for the
construction of the Dirac spectrum in external magnetic fields is proposed.
This method is applied for calculating QED corrections to the bound-electron
$g$-factor in H-like ions. Within the level of accuracy of about 0.1% no
spurious terms are generated in numerical calculations of the SE in magnetic
fields.


title: Nonrelativistic Quark Model Calculation of the S parameter

abstract:
  A critical review is presented of the attempts to estimate the Strong
Interactions contributions to the parameter $S$ ($L_{10}$ in the QCD Chiral
Version). In particular it is discussed why the estimations done for
Technicolor are unreliable. $S$ is calculated for heavy doublets of
Techniquarks using the Nonrelativistic Quark Model and keeping $v\simeq 0.25$
TeV fixed. It is found that heavy Techniquarks decouple, so it is possible to
obtain values for $S$ in agreement with present experimental data.


title: Higgs masses and couplings in the NMSSM

abstract:
  We give the upper bounds on the masses of the lightest and second lightest CP
even Higgs bosons in the NMSSM, the MSSM extended by a gauge singlet. The
dominant two loop corrections are included. Since the coupling R of the
lightest Higgs scalar to gauge bosons can be small, we study in detail the
relation between masses and couplings of both lightest scalars. We present
upper bounds on the mass of a 'strongly' coupled Higgs (R>1/2) as a function of
lower experimental limits on the mass of a 'weakly' coupled Higgs (R<1/2). With
the help of these results, the whole parameter space of the model can be
covered.


title:
$\tan\beta$ Determination From Heavy Higgs Boson Production at Linear
  Colliders

abstract:
  We study the production at future $e^+e^-$ linear colliders of the heavy
neutral Higgs bosons $H$ and $A$ of the minimal supersymmetric standard model
in association with top and bottom quarks. The cross sections have a strong
dependence on the parameter $\tan\beta$, and thus provide a good way to
determine it. At a linear collider with $\sqrt s = 0.5-1$ TeV and expected
integrated luminosities, we find significant sensitivities for determining
$\tan\beta$. In the Supergravity scenario, the sensitivity is particularly
strong for $\tan\beta > 10$, reaching a 15% or better measurement. In the
general MSSM scenario, the interplay between the $4b$ and $4t$ channels results
in a good determination for $\tan\beta < 10$, while the sensitivity is weakened
for higher values of $\tan\beta$.


title:
Electroweak Symmetry Breaking by Strong Supersymmetric Dynamics at the
  TeV Scale

abstract:
  We construct models in which electroweak symmetry is spontaneously broken by
supersymmetric strong dynamics at the TeV scale. The order parameter is a
composite of scalars, and the longitudinal components of the W and Z are
strongly-coupled bound states of scalars. The usual phenomenological problems
of dynamical electroweak symmetry breaking are absent: the sign of the S
parameter unconstrained in strongly interacting SUSY theories, and fermion
masses are generated without flavor-changing neutral currents or large
corrections to the rho parameter. The lightest neutral Higgs scalar can be
heavier than M_Z without radiative corrections from standard-model fields. All
the mass scales in the model can be naturally related in low-scale models of
supersymmetry breaking. The mu problem can also be solved naturally, and the
model can incorporate perturbative unification of standard-model gauge
couplings with intermediate thresholds.


title:
The interplay between Weak and Strong Phases and Direct CP Violation
  from the Charmless B-meson Decays

abstract:
  We present a general analysis on charmless B-meson decays $B\to \pi\pi$ and
$\pi K$. It is noticed that the final state interactions and inelastic
rescattering effects must be significant in order to understand the consistency
of the current data. By using general isospin decompositions, the isospin
amplitudes and the corresponding strong phases could be extracted from a global
$\chi^2$ fit of the experimental data. We emphasize that in general there are
two, rather than one, relative strong phases in the decomposition. In the
assumption of two equalstrong phases as considered in the literature, the
current data, especially the ones concerning $B\to \pi^0 K^{0(\pm)}$decays,
will imply a large isospin amplitude $|a^c_{3/2}| > 40 $, which is larger by a
factor of five than the one from the naive factorization estimation. When two
different strong phases are considered, all the isospin amplitudes can become,
within the $1\sigma$-level, comparable with the theoretical values. We also
show that the difference between the two strong phases cannot be too large and
will be restricted by the most recent upper bound of $B\to \pi^0\pi^0$ decay.
In any case, the strong phases are found to be large and the branching ratio of
$B\to \pi^0\pi^0$ is likely to be enhanced by an order of magnitude in
comparison with the one obtained from the naive factorization approach. Direct
CP violations in all decay modes are also calculated and found to be close to
the sensitivity of the present experiments.


title: Associative photoproduction of charmed particles near threshold

abstract:
  We calculate the cross section and the beam asymmetry for exclusive
photoproduction of charmed particles near threshold ($\gamma+p\to \Lambda_c^+
+\bar{D^0}$), in the framework of an effective Lagrangian model. We discuss the
sensitivity of these observables to the magnetic moment of the $\Lambda_c$
baryon and of the coupling constant in the $p\Lambda_c D$ vertex. We show that
exclusive measurements allow, in principle, to determine the magnetic moments
of charmed baryons.


title: Soft remnant interactions and rapidity gaps

abstract:
  Soft colour exchange models give a unified description of both diffractive
and non-diffractive events, such that e-p and p-pbar collider data with and
without rapidity gaps are well reproduced. We show that these models also
describe the new Tevatron data on diffraction based on observed leading
antiprotons, which provide new information on how to treat the beam particle
remnant in the Monte Carlo model.


title: Neutrino-photon reactions for energies above $m_e$

abstract:
  We show that neutrino-photon reactions above $m_e$ are dominated by the
reaction $\nu \gamma \to \nu e^+ e^-$. We calculate its cross-section and see
that it is larger by several orders of magnitude than the cross-sections of
other neutrino-photon processes, for energies above $m_e$. We also discuss
potential astrophysical and cosmological consequences.


title: Renormalisation Group Analysis of Single Right-handed Neutrino Dominance

abstract:
  We perform a renormalisation group (RG) analysis of neutrino masses and
mixing angles in the see-saw mechanism in the minimal supersymmetric standard
model with three right-handed neutrinos, including the effects of the heavy
neutrino thresholds. We focus on the case that one of the right-handed
neutrinos provides the dominant contribution to the 23 block of the light
Majorana matrix, causing its determinant to approximately vanish and giving an
automatic neutrino mass hierarchy, so called single right-handed neutrino
dominance which may arise from a U(1) family symmetry. In these models
radiative corrections can increase atomospheric and solar neutrino mixing by up
to about 10% and 5%, respectively, and may help to achieve bi-maximal mixing.
Significantly we find that the radiative corrections over the heavy neutrino
threshold region are at least as important as those usually considered from the
lightest right-handed neutrino down to low energies.


title:
Parton densities and structure functions beyond the next-to-leading
  order

abstract:
  We briefly discuss recent results on the evolution of unpolarized parton
densities and structure functions in massless perturbative QCD. Present partial
results on the next-to-next-to-leading order (NNLO) evolution kernels prove
sufficient for reliable calculations at not too small values of the Bjorken
variable, x > 10^-3. One order more can be taken into account at x >= 0.2.
Inclusion of these terms considerably reduces the main theoretical
uncertainties of determinations of alpha_s (to about 1% at the Z-mass) and the
parton densities from structure functions.


title: Supergravity Tensor Calculus in 5D from 6D

abstract:
  Supergravity tensor calculus in five spacetime dimensions is derived by
dimensional reduction from the d=6 superconformal tensor calculus. In
particular, we obtain an off-shell hypermultiplet in 5D from the on-shell
hypermultiplet in 6D. Our tensor calculus still retains the dilatation gauge
symmetry so that it becomes a trivial gauge fixing to make the Einstein term
canonical in a general matter-Yang-Mills-supergravity coupled system.


title: QCD improved parton distribution functions of ${\mathbf{\gamma^*_L}}$

abstract:
  QCD corrections to the QED formula for parton distribution functions of the
longitudinal virtual photon are derived in the leading--logarithmic
approximation. It is shown that the resulting PDF satisfy the same homogeneous
evolution equations as those of hadrons, but contrary to the latter are
perturbatively calculable. Properties of these distribution functions are
discussed and their phenomenological consequences outlined.


title:
Deep Inelastic Scattering Data and the Problem of Saturation in Small-x
  Physics

abstract:
  We investigate the role of unitarization effects in virtual photon-proton
(\gamma^*p) interactions at small x. The q\bar{q}-fluctuation of the initial
photon is separated into a small distance and a large distance component and a
model for the unitarization of each component is proposed. The Born
approximation for the small size component is calculated using QCD perturbation
theory. Reggeon diagram technique is used in order to obtain a self-consistent
scheme for both total \gamma^*p cross section and diffractive production. The
model gives a good description of HERA data in the small-x region, with a
single Pomeron of intercept 1.2.


title: High-Energy Scattering and Diffraction: Theory Summary

abstract:
  New developments in the theory and phenomenology of high-energy scattering
and diffraction that were presented and discussed at DIS2000 are reviewed.


title: Neutrino Mixing Schemes

abstract:
  A revolution in our understanding of the neutrino sector is underway, driven
by observations that are interpreted in terms of changes in neutrino flavors as
they propagate. Since neutrino oscillations occur only if neutrinos are
massive, these phenomena indicate physics beyond the Standard Model. With the
present evidence for oscillations from atmospheric, solar and accelerator data,
we are already able to begin to make strong inferences about the mass spectrum
and mixings of neutrinos. Theoretical efforts to achieve a synthesis have
produced a variety of models with differing testable consequences. A
combination of particle physics, nuclear physics and astrophysics is needed for
a full determination of the fundamental properties of neutrinos. This article
reviews what has been achieved thus far and the future prospects for
understanding the nature of neutrino masses and mixing.


title:
Comment on ``Comparison of strangeness production between A+A and p+p
  reactions from 2 to 160 A GeV", by J. C. Dunlop and C. A. Ogilvie

abstract:
  A recent paper on energy dependence of strangeness production in A+A and p+p
interactions written by Dunlop and Ogilvie (Phys. ReV. C61 031901(R) (2000)
indicates that there is a significant misunderstanding about the concept of
strangeness enhancement and its role as a signal of Quark Gluon Plasma
creation.
  In this comment we will try to clarify some essential points.


title: Magnetic string contribution to hadron dynamics in QCD

abstract:
  Dynamics of a light quark in the field of static source (heavy-light meson)
is studied using the nonlinear Dirac equation, derived recently. Special
attention is paid to the contribution of magnetic correlators and it is found
that it yields a significant increase of string tension at intermediate
distances. The spectrum of heavy-light mesons is computed with account of this
contribution and compared to experimental and lattice data.


title: Self-Breaking of the Standard Model Gauge Symmetry

abstract:
  If the gauge fields of the Standard Model propagate in TeV-size extra
dimensions, they rapidly become strongly coupled and can form scalar bound
states of quarks and leptons. If the quarks and leptons of the third generation
propagate in 6 or 8 dimensions, we argue that the most tightly bound scalar is
a composite of top quarks, having the quantum numbers of the Higgs doublet and
a large coupling to the top quark. In the case where the gauge bosons propagate
in a bulk of a certain volume, this composite Higgs doublet can successfully
trigger electroweak symmetry breaking. The mass of the top quark is correctly
predicted to within 20%, without the need to add a fundamental Yukawa
interaction, and the Higgs boson mass is predicted to lie in the range 165 -
230 GeV. In addition to the Higgs boson, there may be a few other scalar
composites sufficiently light to be observed at upcoming collider experiments.


title: Smoothed Particle Hydrodynamics for Relativistic Heavy Ion Collisions

abstract:
  The method of smoothed particle hydrodynamics (SPH) is developped
appropriately for the study of relativistic heavy ion collision processes. In
order to describe the flow of a high energy but low baryon number density
fluid, the entropy is taken as the SPH base. We formulate the method in terms
of the variational principle. Several examples show that the method is very
promising for the study of hadronic flow in RHIC physics.


title: The Impact of |Delta I|=5/2 Transitions in K-> pi pi Decays

abstract:
  We consider the impact of isospin violation on the analysis of K-> pi pi
decays. We scrutinize, in particular, the phenomenological role played by the
additional weak amplitude, of |Delta I|=5/2 in character, incurred by the
presence of isospin violation. We show that Watson's theorem is appropriate in
O(m_d-m_u), so that the inferred pi-pi phase shift at sqrt{s}=m_K determines
the strong phase difference between the I=0 and I=2 amplitudes in K-> pi pi
decay. We find the magnitude of the |Delta I|=5/2 amplitude thus implied by the
empirical branching ratios to be larger than expected from estimates of
isospin-violating strong and electromagnetic effects. We effect a new
determination of the octet and 27-plet coupling constants with
strong-interaction isospin violation and with electromagnetic effects, as
computed by Cirigliano, Donoghue, and Golowich, and find that we are unable to
resolve the difficulty. Exploring the role of |Delta I|=5/2 transitions in the
CP-violating observable epsilon'/epsilon, we determine that the presence of a
|Delta I|=5/2 amplitude impacts the empirical determination of omega, the ratio
of the real parts of the |Delta I|=3/2 to |Delta I|=1/2 amplitudes, and that it
generates a decrease in the estimation of epsilon'/epsilon.


title:
A Consistent Calculation of Heavy Meson Decay Constants and Transition
  Wave Functions in the Complete HQEFT

abstract:
  Within the complete heavy quark effective field theory (HQEFT), the QCD sum
rule approach is used to evaluate the decay constants including 1/m_Q
corrections and the Isgur-Wise function and other additional important wave
functions concerned at 1/m_Q for the heavy-light mesons. The 1/m_Q corrections
to the scaling law f_M \sim F/\sqrt{m_M} are found to be small in HQEFT, which
demonstrates again the validity of 1/m_Q expansion in HQEFT. It is also shown
that the residual momentum v.k of heavy quark within hadrons does be around the
binding energy \bar{\Lambda} of the heavy hadrons. The calculations presented
in this paper provide a consistent check on the HQEFT and shows that the HQEFT
is more reliable than the usual HQET for describing a slightly off-mass shell
heavy quark within hadron as the usual HQET seems to lead to the breakdown of
1/m_Q expansion in evaluating the meson decay constants. It is emphasized that
the introduction of the `dressed heavy quark' mass is useful for the
heavy-light mesons (Qq) with m_Q >> \bar{\Lambda} >> m_q, while for heavy-heavy
bound states (\psi_1\psi_2) with masses m_1, m_2 >> \bar{\Lambda}, like
bottom-charm hadrons or similarly for muonium in QED, one needs to treat both
particles as heavy effective particles via 1/m_1 and 1/m_2 expansions and
redefine the effective bound states and modified `dressed heavy quark' masses
within the HQEFT.


title:
Dear Santa: Heavy Flavour Physics at Neutrino Factories - Desires from
  Theory

abstract:
  Even in 2010 the CKM parameters $V_{cs}$, $V_{cd}$ and $V_{ub}$ will be known
with less than desirable accuracy; the discovery potential for New Physics in
charm decays -- in particular their CP asymmetries -- will be far from
exhausted; important tests of our theoretical tools will not have been
performed. I sketch the impact a $\nu$fact could have in these areas.


title: High Energy Scattering from the $AdS/CFT$ Correspondence

abstract:
  We apply the AdS/CFT correspondence to derive expressions for the scattering
amplitudes at high energy for gauge theories at strong coupling. A method is
proposed based on the computation of correlators of Wilson loop operators by
their stringy duals in AdS spaces using either the supergravity (weak field) or
classical (minimal surface) approximations.


title:
Exchange-degenerate Regge trajectories: a fresh look from resonance and
  forward scattering regions

abstract:
  The exchange-degeneracy of the mesonic $f$, $\omega $, $\rho $ and $a_{2}$
Regge trajectories, dominant at moderate and high energies in hadron elastic
scattering, is analyzed from two viewpoints. The first one concerns the masses
of the resonances lying on these trajectories; the second one deals with the
total cross-sections and the ratios of the real to the imaginary parts of the
forward amplitudes of hadron and photon induced reactions. Neither set of data
supports exact exchange-degeneracy.


title: The chiral symmetry restoration phase transition in baryon spectrum

abstract:
  It is shown that in the large $N_c$ limit the light baryon spectrum exhibits
the chiral restoration phase transition at high enough excitation energy. Such
a phase transition is evidenced by the systematical parity doublets observed in
the upper part of $N$ and $\Delta$ spectra.


title: The O(infty) nonlinear sigma model out of equilibrium

abstract:
  The out-of-equilibrium dynamics of the O(N+1) nonlinear sigma model in 1+1
dimensions is investigated in the large N limit. Regarding the nonlinearity as
the effect of a suitable large coupling limit of the O(N+1) \phi^4 model, we
first of all verify that the two limits commute, so that the O(infty) nonlinear
sigma model is uniquely defined. Such model can be completely renormalized also
in the out-of-equilibrium context, allowing us to study the consequences of its
asymptotic freedom on the time evolution far from equilibrium. In particular we
numerically study the spectrum of produced particles during the relaxation of
an initial condensate and find no evidence for parametric resonance, a result
that is consistent with the presence of the nonlinear contraint. Only a weak
nonlinear resonance at late times is observed.


title: On the Role of Energy Conservation in High-Energy Nuclear Scattering

abstract:
  We argue that most commonly used models for nuclear scattering at
ultra-relativistic energies do not treat energy conservation in a consistent
fashion. Demanding theoretical consistency as a minimal requirement for a
realistic model, we provide a solution for the above-mentioned problem, the
so-called ``Parton-Based Gribov-Regge Theory''. In order to keep a clean
picture, we do not consider secondary interactions. We provide a very
transparent extrapolation of the physics of more elementary interactions
towards nucleus-nucleus scattering, without considering any nuclear effects due
to final state interactions. In this sense we consider our model a realistic
and consistent approach to describe the initial stage of nuclear collisions.


title: On Geometric Engineering of Supersymmetric Gauge Theories

abstract:
  We present the basic ideas of geometric engineering of the supersymmetric
quantum field theories viewed as a low energy limit of type II strings and
F-theory on singular Calabi Yau manifolds. We first give the main lines of
toric geometry as it is a powerful technique to deal compact complex manifolds.
Then we introduce mirror symmetry which plays a crucial role in the study of
superstring dualities and finally we give elements on Calabi Yau singularities.
After that we study the geometric engineering of N=2 supersymmetric gauge
theories in six and four dimensions. Finally we make comments regarding $ N=1$
SYM in four dimensions.


title:
Dimensionally regulated one-loop box scalar integrals with massless
  internal lines

abstract:
  Using the Feynman parameter method, we have calculated in an elegant manner a
set of one$-$loop box scalar integrals with massless internal lines, but
containing 0, 1, 2, or 3 external massive lines. To treat IR divergences (both
soft and collinear), the dimensional regularization method has been employed.
The results for these integrals, which appear in the process of evaluating
one$-$loop $(N\ge 5)-$point integrals and in subdiagrams in QCD loop
calculations, have been obtained for arbitrary values of the relevant kinematic
variables and presented in a simple and compact form.


title: B_s \to \ell^+ \ell^- in a model II 2HDM and MSSM

abstract:
  In this paper we analyze the process $B_s \to \ell^+ \ell^-$ in a model II
2HDM and MSSM. All the leading terms of Wilson coefficients relevant to the
process are given in the large tan$\beta$ limit. It is shown that the decay
width for $B_s \to \ell^+ \ell^-$ depends on all parameters except $m_{A^0}$ in
the 2HDM. The branching ratio of $B_s \to \mu^+ \mu^-$ can reach its
experimental bound in some large tan$\beta$ regions of the parameter space in
MSSM because the amplitude increases like tan$^3\beta$ in the regions. For
l=$\tau$, the branching ratio can even reach $10^{-4}$ in the regions.
Therefore, the experimental measurements of leptonic decays of $B_s$ could put
a constraint on the contributions of neutral Higgs bosons and consequently the
parameter space in MSSM.


title: Suppressing Flavor Anarchy

abstract:
  We present a new mechanism, which does not require any flavor symmetry, to
explain the small Yukawa couplings and CKM mixing angles. The Yukawa matrices
are assumed to be random at short distances and the hierarchical structure is
generated in the infrared by renormalization group flow. The generic
qualitative predictions of this mechanism are in good agreement with
observation. We give several simple examples in supersymmetric theories. We
show that our mechanism can also ameliorate the supersymmetric flavor problem,
and make predictions for the superpartner mass spectrum. The mechanism is fully
consistent with grand unification, and in SU(5)-based models of neutrino mass,
predicts a large mixing angle for muon neutrino to tau neutrino oscillations.


title: Higher-twist contributions to F_L and F_2 from instantons

abstract:
  We study the twist-4 contribution to the unpolarized nucleon structure
functions, F_L and F_2, in an approach where the vacuum structure of QCD is
described by a dilute medium of instantons ($\bar\rho / \bar R \ll 1$). The
dominant power corrections come from the twist-4 quark-gluon operators and are
of the order $1/(\bar\rho^2 Q^2)$. The contributions from four-quark operators
are suppressed. The approach predicts large 1/Q^2-corrections to F_L, in
agreement with the results of QCD fits to the data.


title:
Relaxing b\to s\gamma Constraints on the Supersymmetric Particle Mass
  Spectrum

abstract:
  We consider the radiative decay b \to s \gamma in a supersymmetric extension
of the standard model of particle interactions, where the $b$-quark mass is
entirely radiative in origin. This is accomplished by the presence of
nonholomorphic soft supersymmetry breaking terms in the Lagrangian. As a
result, the contributions to the b \to s \gamma amplitude from the charged
Higgs boson and the charginos/neutralinos are suppressed by 1/\tan^2\beta and
{\cal O}(\alpha/\alpha_s) respectively, allowing these particles to be lighter
than in the usual supersymmetric model. Their radiatively generated couplings
differ from the usual tree-level ones and change the collider phenomenology
drastically. We also study how this scenario may be embedded into a larger
framework, such as supersymmetric SU(5) grand unification.


title: Resumming the large-N approximation for time evolving quantum systems

abstract:
  In this paper we discuss two methods of resumming the leading and next to
leading order in 1/N diagrams for the quartic O(N) model. These two approaches
have the property that they preserve both boundedness and positivity for
expectation values of operators in our numerical simulations. These
approximations can be understood either in terms of a truncation to the
infinitely coupled Schwinger-Dyson hierarchy of equations, or by choosing a
particular two-particle irreducible vacuum energy graph in the effective action
of the Cornwall-Jackiw-Tomboulis formalism. We confine our discussion to the
case of quantum mechanics where the Lagrangian is $L(x,\dot{x}) = (1/2)
\sum_{i=1}^{N} \dot{x}_i^2 - (g/8N) [ \sum_{i=1}^{N} x_i^2 - r_0^2 ]^{2}$. The
key to these approximations is to treat both the $x$ propagator and the $x^2$
propagator on similar footing which leads to a theory whose graphs have the
same topology as QED with the $x^2$ propagator playing the role of the photon.
The bare vertex approximation is obtained by replacing the exact vertex
function by the bare one in the exact Schwinger-Dyson equations for the one and
two point functions. The second approximation, which we call the dynamic Debye
screening approximation, makes the further approximation of replacing the exact
$x^2$ propagator by its value at leading order in the 1/N expansion. These two
approximations are compared with exact numerical simulations for the quantum
roll problem. The bare vertex approximation captures the physics at large and
modest $N$ better than the dynamic Debye screening approximation.


title: Analytic resummation for the quark form factor in QCD

abstract:
  The quark form factor is known to exponentiate within the framework of
dimensionally regularized perturbative QCD. The logarithm of the form factor is
expressed in terms of integrals over the scale of the running coupling. I show
that these integrals can be evaluated explicitly and expressed in terms of
renormalization group invariant analytic functions of the coupling and of the
space--time dimension, to any order in renormalized perturbation theory.
Explicit expressions are given up two loops. To this order, all the infrared
and collinear singularities in the logarithm of the form factor resum to a
single pole in epsilon, whose residue is determined at one loop, plus powers of
logarithms of epsilon. This behavior is conjectured to extend to all loops.


title:
Gravitational Origin of Quark Masses and Mixings in an Extra-Dimensional
  Brane-World

abstract:
  Using the resolution of the gauge hierarchy problem recently proposed by
Randall and Sundrum, we find a natural explanation for the observed fermion
masses and mixings of the three Standard Model (SM) generations. Localizing
massless SM matter generations on neighboring 3-branes in an extra dimensional
world leads to effective four dimensional masses and mixings from the coupling
of the fermions with the background metric. We find that the positions of the
3-branes required to solve the gauge hierachy problem simultaneously reproduces
phenomenologically acceptable fermion masses and mixings.


title: The Effective Pressure of a Saturated Gluon Plasma

abstract:
  The evolution of the gluon plasma produced with saturation initial conditions
is calculated via transport theory for nuclear collisions with 0.1 <sqrt(s) <10
A TeV. The effective longitudinal pressure is found to remain significantly
below the lattice QCD pressure with these initial conditions until the plasma
cools to near the confinement scale. The absolute value of the transverse
energy per unit of rapidity and its dependence on beam energy is shown to
provide a sensitive test of gluon saturation models since the fractional
transverse energy loss due to final state interactions is predicted to be much
smaller and exhibit a weaker energy dependence than nondissipative
hydrodynamics applied throughout the evolution.


title: A Calculation of Higgs Mass in the Standard Model

abstract:
  The assumption that the ratio of the Higgs self-coupling to the square of its
yukawa coupling to the top is (almost) independent of the renormalization scale
fixes the Higgs mass within narrow limits at m=160 GeV using only the values of
gauge couplings and top mass.


title: Report of the QCD Working Group

abstract:
  The activities of the QCD working group concentrated on improving the
understanding and Monte Carlo simulation of multi-jet final states due to hard
QCD processes at LEP, i.e. quark-antiquark plus multi-gluon and/or secondary
quark production, with particular emphasis on four-jet final states and b-quark
mass effects. Specific topics covered are: relevant developments in the main
event generators PYTHIA, HERWIG and ARIADNE; the new multi-jet generator
APACIC++; description and tuning of inclusive (all-flavour) jet rates; quark
mass effects in the three- and four-jet rates; mass, higher-order and
hadronization effects in four-jet angular and shape distributions; b-quark
fragmentation and gluon splitting into b-quarks.


title:
Decay and Decoupling of heavy Right-handed Majorana Neutrinos in the L-R
  model

abstract:
  Heavy right-handed neutrinos are of current interest. The interactions and
decay of such neutrinos determine their decoupling epoch during the evolution
of the universe. This in turn affects various observable features like the
energy density, nucleosynthesis, CMBR spectrum, galaxy formation, and
baryogenesis. Here, we consider reduction of right-handed electron-type
Majorana neutrinos, in the left-right symmetric model, by the WR+ - WR- channel
and the channel originating from an anomaly, involving the SU(2)R gauge group,
as well as decay of such neutrinos. We study the reduction of these neutrinos
for different ranges of left-right model parameters, and find that, if the
neutrino mass exceeds the right-handed gauge boson mass, then the neutrinos
never decouple for realistic values of the parameters, but, rather, decay in
equilibrium. Because there is no out-of-equilibrium decay, no mass bounds can
be set for the neutrinos.


title: Singly charged higgses at linear collider

abstract:
  We consider the production of singly charged Higgs bosons in the Higgs
triplet and two Higgs doublet models. We evaluate the cross sections for the
pair production and the single production of charged higgses at linear
collider. The decay modes of $H^+$ and the Standard Model backgrounds are
considered. We analyze the possibilities to differentiate between triplet and
two Higgs doublet models.


title:
Strongly-interacting fermions from a higher-dimensional unified gauge
  theory

abstract:
  The method of coset-space dimensional reduction is employed in order to
proceed from a gauged E_8 * E_8' unified theory defined in 10 dimensions to 4
dimensions. The resulting theory comprises the Standard Model along with a
strongly-interacting fermion sector which breaks the electroweak symmetry
dynamically at the right scale.


title:
Diffractive structure function at very small beta and unitarity
  corrections in the color dipole Regge approach

abstract:
  Starting from the phenomenologically successful color dipole representation
of the diffractive structure function, we identify the dominant contribution to
the diffractive cross section at small beta. The beta dependence is calculated
taking advantage of the Regge factorization properties of the hard mechanism
which drives the dependence on the diffractive mass. We impose the unitarity
constraints on the $x_\Pom$-dependence and comment on the screening corrections
to $F_{2p}$.


title: Measuring the neutrino mass using intense photon and neutrino beams

abstract:
  We compute the cross section for neutrino-photon scattering taking into
account a neutrino mass. We explore the possibility of using intense neutrino
beams, such as those available at proposed muon colliders, together with high
powered lasers to probe the neutrino mass in photon-neutrino collisions.


title: Towards a Theory of Hadronic B Decays

abstract:
  We review recent advances in the theory of strong-interaction effects and
final-state interactions in hadronic weak decays of heavy mesons. In the
heavy-quark limit, the amplitudes for most nonleptonic, two-body B decays can
be calculated from first principles and expressed in terms of semileptonic form
factors and light-cone distribution amplitudes. We discuss the features of this
novel QCD factorization and illustrate its phenomenological implications.


title:
Initial Scales, Supersymmetric Dark Matter and Variations of
  Neutralino-Nucleon Cross Sections

abstract:
  The neutralino-nucleon cross section in the context of the MSSM with
universal soft supersymmetry-breaking terms is compared with the limits from
dark matter detectors. Our analysis is focussed on the stability of the
corresponding cross sections with respect to variations of the initial scale
for the running of the soft terms, finding that the smaller the scale is, the
larger the cross sections become. For example, by taking $10^{10-12}$ GeV
rather than $M_{GUT}$, which is a more sensible choice, in particular in the
context of some superstring models, we find extensive regions in the parameter
space with cross sections in the range of $10^{-6}$--$10^{-5}$ pb, i.e. where
current dark matter experiments are sensitive. For instance, this can be
obtained for $\tan\beta\gsim 3$.


title:
$1/m_Q$ and $1/N_c$ Expansions for Excited Heavy Baryons with Light
  Quarks in the Spin-Flavor Symmetric Representation

abstract:
  The mass spectrum of the L=1 orbitally excited heavy baryons with light
quarks in the spin-flavor symmetric representation is studied by the $1/N_c$
expansion method in the framework of the heavy quark effective theory. The
mixing effect from the baryons in the mixed representation is considered. The
general pattern of the spectrum is predicted which will be verified by the
experiments in the near future. The $1/m_Q$ and SU(3) corrections are also
considered. Mass relations for the baryons $\Lambda_{c1}^{(*)}$,
$\Sigma_{c1}^{(*)}$, $\Xi_{c1}^{(')(*)}$, and $\Omega_{c1}^{(*)}$ are derived.


title: Hybrid Parallel Computation of Integration in GRACE

abstract:
  With an integrated software package {\tt GRACE}, it is possible to generate
Feynman diagrams, calculate the total cross section and generate physics events
automatically. We outline the hybrid method of parallel computation of the
multi-dimensional integration of {\tt GRACE}. We used {\tt MPI} (Message
Passing Interface) as the parallel library and, to improve the performance we
embedded the mechanism of the dynamic load balancing. The reduction rate of the
practical execution time was studied.


title: Introduction to Monte Carlo methods

abstract:
  These lectures given to graduate students in high energy physics, provide an
introduction to Monte Carlo methods. After an overview of classical numerical
quadrature rules, Monte Carlo integration together with variance-reducing
techniques is introduced. A short description on the generation of
pseudo-random numbers and quasi-random numbers is given. Finally, methods to
generate samples according to a specified distribution are discussed. Among
others, we outline the Metropolis algorithm and give an overview of existing
algorithms for the generation of the phase space of final state particles in
high energy collisions.


title:
Right-handed Neutrinos in $\nu_{\mu} + e \to \nu_{\mu} + e$ Elastic
  Scattering

abstract:
  In this paper a scenario admitting the participation of the exotic
right-handed scalar $S_{R}$ coupling in addition to the standard left-handed
$(V, A)_{L}$ couplings in the low energy neutrino-electron scattering is
considered. The main goal is to show how the presence of the right-handed
neutrinos in the $(\nu e)$ scattering changes the laboratory differential cross
section in relation to the Standard Model prediction. We consider the $(\nu e)$
process at the level of the four-fermion point interaction. Muon-neutrinos are
assumed to be massive and to be polarized Dirac fermions. In the laboratory
differential cross section the new interference term between the the standard
$V_{L}$ coupling of the left-handed neutrino and exotic $S_{R}$ coupling of the
right-handed neutrino appears which does not vanish in the limit of massless
neutrino. This new contribution, including the information about the transverse
neutrino polarization, generates the azimuthal assymetry in the angular
distribution of the recoil electrons. This regularity would be the proof of the
presence of R-handed neutrinos in the $\nu e$ scattering.


title: Exclusive decays of Xi(QQ') baryons in NRQCD sum rules

abstract:
  We perform a detailed study of semileptonic form-factors for the doubly heavy
baryons in the framework of three-point NRQCD sum rules. The analyis of spin
symmetry relations as well as numerical results on various exclusive decay
modes of doubly heavy baryons are given.


title: Extracting m_s From Flavor Breaking in Hadronic Tau Decays

abstract:
  New finite energy sum rules (FESR's) for extracting m_s from hadronic tau
decay data are constructed which (1) significantly reduce potential theoretical
uncertainties present in existing sum rule analyses and (2) remove problems
associated with both the poor convergence of the OPE representation of the
longitudinal part of the $us$ vector and axial vector correlators and the large
statistical errors in the $us$ spectral data above the K^* region.


title: Evolution of truncated moments of singlet parton distributions

abstract:
  We define truncated Mellin moments of parton distributions by restricting the
integration range over the Bjorken variable to the experimentally accessible
subset x_0 < x < 1 of the allowed kinematic range 0 < x < 1. We derive the
evolution equations satisfied by truncated moments in the general (singlet)
case in terms of an infinite triangular matrix of anomalous dimensions which
couple each truncated moment to all higher moments with orders differing by
integers. We show that the evolution of any moment can be determined to
arbitrarily good accuracy by truncating the system of coupled moments to a
sufficiently large but finite size, and show how the equations can be solved in
a way suitable for numerical applications. We discuss in detail the accuracy of
the method in view of applications to precision phenomenology.


title: New Constraints on "Cool" Dark Matter

abstract:
  It has been suggested that a sterile neutrino \nu_s which mixes with standard
neutrinos can form nonthermal ``cool'' Dark Matter if its mass and mixing angle
fall in the ranges 0.1 keV \lsim m_s \lsim 10 keV and 10^{-10} \lsim \sin^2
\theta \lsim 10^{-4}, respectively. We point out that the required mixing makes
these heavy neutrinos unstable. The dominant decay mode is into three light
neutrinos, but the most stringent constraint comes from the non-observation of
radiative decays into a single light neutrino and a photon. Moreover, we point
out that the density of thermal relics of such \nu_{s}'s would be too high,
unless the reheating temperature after inflation was below \sim 10 GeV.


title: Cosmology and Hierarchy in Stabilized Warped Brane Models

abstract:
  We examine the cosmology and hierarchy of scales in models with branes
immersed in a five-dimensional curved spacetime subject to radion
stabilization. When the radion field is time-independent and the inter-brane
spacing is stabilized, the universe can naturally find itself in the
radiation-dominated epoch. This feature is independent of the form of the
stabilizing potential. We recover the standard Friedmann equations without
assuming a specific form for the bulk energy-momentum tensor. In the models
considered, if the observable brane has positive tension, a solution to the
hierarchy problem requires the presence of a negative tension brane somewhere
in the bulk. We find that the string scale can be as low as the electroweak
scale. In the situation of self-tuning branes where the bulk cosmological
constant is set to zero, the brane tensions have hierarchical values. In the
case of a polynomial stabilizing potential no new hierarchy is created.


title: Measuring the SUSY Mass Scale at the LHC

abstract:
  An effective mass scale Meffsusy for supersymmetric particles is defined and
techniques for its measurement at the LHC discussed. Monte Carlo results show
that, for jets + ETmiss events, a variable constructed from the scalar sum of
the transverse momenta of all reconstructed jets together with ETmiss provides
in most cases the most accurate model independent measurement of Meffsusy
(intrinsic precision ~ 2.1 % for mSUGRA models). The overall precision with
which Meffsusy could be measured after given periods of LHC running and for
given classes of SUSY models is calculated. The technique is extended to
measurements of the total SUSY particle production cross section sigmasusy.


title:
K-meson neutrinoless double muon decay as a probe of neutrino masses and
  mixings

abstract:
  Recently an upper bound on the rate of the lepton number violating decay
$K^+\to \mu^+\mu^+\pi^-$ has been significantly reduced by the E865 experiment
at BNL and further improvement is expected in the near future. We study this
process as a possible source of information on neutrino masses and mixings. We
find that it is insensitive to the light(eV domain) and heavy(GeV domain)
neutrinos. However due to the effect of a resonant enhancement this decay is
very sensitive to neutrinos $\nu_j$ in the mass region $245{MeV}\leq
m_{\nu_j}\leq 389$ MeV. At present experimental sensitivity we deduce new
stringent limits on the neutrino mixing matrix element $U_{\mu j}$ for neutrino
masses in this region.


title:
Three flavour neutrino oscillations in models with large extra
  dimensions

abstract:
  The key challenges for models with large extra dimensions, posed by neutrino
physics are: first to understand why neutrino masses are small and second,
whether one can have a simultaneous explanation of all observed oscillation
phenomena. There exist models that answer the first challenge by using singlet
bulk neutrinos coupled to the standard model in the brane. Our goal in this
paper is to see to what extent the simplest versions of these models can answer
the second challenge. Our conclusion is that the minimal framework that has no
new physics beyond the above simple picture cannot simultaneously explain
solar, atmospheric and LSND data, whereas there are several ways that it can
accommodate the first two. This would suggest that confirmation of LSND data
would indicate the existence of new physics either in the brane or in extra
dimensions or both, if indeed it turns out that there are large extra
dimensions.


title:
Radiative corrections to the semileptonic Dalitz plot with angular
  correlation between polarized decaying hyperons and emitted charged leptons

abstract:
  We obtain a model-independent expression for the Dalitz plot of semileptonic
decays of polarized hyperons including radiative corrections to order alpha and
neglecting terms of order (alpha q)/(pi M_1), where q is the four-momentum
transfer and M_1 is the mass of the decaying hyperon. We specialize our results
to exhibit the correlation between the charged-lepton momentum and the spin of
the decaying hyperon. We present results for the three-body region of the
Dalitz plot and for the complete Dalitz plot (which includes the four-body
region). From these results we also obtain the corresponding radiative
corrections to the integrated lepton spin-asymmetry coefficient. Our formulas
are valid for charged as well as for neutral decaying hyperons and are
appropriate for model-independent experimental analysis whether the real photon
is discriminated or not.


title:
Direct CP violation in radiative b decays in and beyond the Standard
  Model

abstract:
  We consider the partial rate asymmetry in the inclusive decay modes b to s
gamma and b to d gamma, concentrating on non-standard models with new charged
Higgs interactions. We find that the charged Higgs contribution to the
asymmetry for b to s gamma is small in such models due to a universal
cancellation mechanism. The asymmetry is therefore difficult to distinguish
experimentally from the Standard Model (SM) value, which is also small. The
cancellation mechanism is found to be rendered inoperative in supersymmetry due
to the presence of chargino loops. Unlike b to s gamma, the rate asymmetry for
b to d gamma in Higgs models can be quite different from its SM value,
generally ranging from -20% to +20%. Specific model calculations are performed
for the Three-Higgs Doublet Model and the ``Top'' Two-Higgs Doublet Model to
serve as illustrations. We also offer some suggestions that may be helpful to
experimentalists in the detection of the inclusive mode b to d gamma.


title: Is $U_{e3}$ really related to the solar neutrino solutions?

abstract:
  It has been said that the measurements of $U_{e3}$ in the lepton flavor
mixing matrix would help discriminate between the possible solar neutrino
solutions under the natural conditions with the neutrino mass hierarchies of
$m_1 \ll m_2 \ll m_3$ and $m_1 \sim m_2 \gg m_3$, where $m_i$ is the $i$-th
generation neutrino absolute mass. However, it is not true, and the relation
between $\sin^2 2 \theta_{12}$ and $U_{e3}$ obtained by Akhmedov, Branco, and
Rebelo is trivial in actual. We show in this paper that the value of $U_{e3}$
cannot predict the solar neutrino solutions without one additional nontrivial
condition.


title: Asymmetric Quarks in the Proton

abstract:
  Asymmetries in the quark momentum distributions in the proton reveal
fundamental aspects of strong interaction physics. Differences between u-bar
and d-bar quarks in the proton sea provide insight into the dynamics of the
pion cloud around the nucleon and the nature of chiral symmetry breaking.
Polarized flavor asymmetries allow the effects of pion clouds to be
disentangled from those of antisymmetrization. Asymmetries between s and s-bar
quark distributions in the nucleon are also predicted from the chiral
properties of QCD.


title:
A note on dynamical stabilization of internal spaces in multidimensional
  cosmology

abstract:
  The possibility of dynamical stabilization of an internal space is
investigated for a multidimensional cosmological model with minimal coupled
scalar field as inflaton. It is shown that a successful dynamical
compactification crucially depends on the type of interaction between the
geometrical modulus field and the inflaton and its decay products. In the
considered model a stable compactification can be ensured via trapping of the
modulus field by a minimum of the effective potential.


title: Diffractive $\phi$ Production in a Perturbative QCD Model

abstract:
  The elastic leptoproduction of $\phi$ measured by the H1 collaboration at
HERA is described by a perturbative QCD model, based on open $s\bar{s}$
production and parton hadron duality, proposed by Martin et al. We observe that
both the total cross section and the ratio of the longitudinal and transverse
cross sections are well reproduced with an effective strange-quark mass $m_s
\sim 320- 380 $ MeV for various gluon distribution functions. Possible
connection of the effective mass and the momentum dependent dynamical mass
associated with dynamical breaking of chiral symmetry is also discussed.


title: Determining the Spin Structure of the Photon at Future Colliders

abstract:
  It is demonstrated that measurements of the spin asymmetry for di-jet
production at future polarized colliders appear to be particularly suited for a
first determination of the so far unmeasured parton densities of circularly
polarized photons.


title: Can cosmic strangelets reach the earth?

abstract:
  The mechanism for the propagation of strangelets with low baryon number
through the atmosphere of the Earth has been explored. It has been shown that
under suitable initial conditions, such strangelets may indeed reach depths
near mountain altitudes with mass numbers and charges close to the observed
values in cosmic ray experiments.


title: On impact parameter dependence of low-x structure functions

abstract:
  We consider impact parameter dependence of the polarized and unpolarized
structure functions. Unitarity does not allow factorization of the structure
functions over the Bjorken x and the impact parameter b variables. On the basis
of the particular geometrical model approach we conclude that spin of
constituent quark may have a significant orbital angular momentum component
which can manifest itself through the peripherality of the spin dependent
structure functions.


title: Glueballs: A central mystery

abstract:
  Glueball candidates and qqbar mesons have been found to be produced with
different momentum and angular dependences in the central region of pp
collisions. This talk illustrates this phenomenon and explains the phi and t
dependences of mesons with JPC = 0++,0-+, 1++, 2++ and 2-+. For production of
0++ and 2++ mesons the analysis reveals a systematic behaviour in the data that
appears to distinguish between qqbar and non-qqbar or glueball candidates. An
explanation is given for the absence of 0-+ glueball candidates in central
production at present energies and the opportunity for their discovery at RHIC
is noted.


title:
Logarithmic Potential Model of Quigg and Rosner as a Generalization of
  Naive Quark Model

abstract:
  Exploiting the explicit mass formulae for logarithmic potential model of
Quigg and Rosner it is shown that at least on the level of mass-relations this
model reproduces the naive quark model relations and generalizes the last one
in case of highly non-trivial potential. Generalization includes the relations
for higher values of orbital quantum numbers. In particular, preditions for
recently discovered atom-like P-states are no worse than for any other
potential models.The advantage consists in simplicity of approach.


title: Mass dependence of HBT correlations in e^+e^- annihilation

abstract:
  Mass dependence of the effective source radii, observed in hadronic $Z^0$
decays by several LEP I experiments, is analyzed in a model which assumes
proportionality between four-momentum of a produced particle and the
four-vector describing its space-time position at the freeze-out. It is shown
that this relation (commonly accepted in description of high-energy collisions)
can explain the data, provided all particles are emitted from a "tube" of $\sim
1$ fm in diameter at a constant proper time $\sim 1.5$ fm.


title:
On classical description of radiation from neutral fermion with
  anomalous magnetic moment

abstract:
  Electromagnetic radiation from an uncharged spin 1/2 particle with an
anomalous magnetic moment moving in the classical electromagnetic external
field originates from quantum spin-flip transitions. Although this process has
a purely quantum nature, it was observed for certain particular external field
configurations that, when quantum recoil is neglected, the radiation power
corresponds to the classical radiation from an evolving magnetic dipole. We
argue that this correspondence has a more general validity in the case of an
unpolarized particle and derive a general formula for radiation in terms of the
external field strength and its derivatives. A classical dynamics of the spin
is described by the Bargmann-Michel-Telegdi equation.


title:
QCD predictions for spin dependent photonic structure function
  $g_1^{\gamma}(x,Q^2)$ in the low x region of future linear colliders

abstract:
  Spin dependent structure function $g_1^{\gamma}(x,Q^2)$ of the polarised
photon is analysed within the formalism based upon the unintegrated spin
dependent parton distributions incorporating the LO Altarelli-Parisi evolution
and the double $ln^2(1/x)$ resummation at low values of Bjorken parameter x. We
analyse the effects of the double $ln^2(1/x)$ resummation on the behaviour of
$g_1^{\gamma}(x,Q^2)$ in the low x region which may be accessible in future
linear $e^+e^-$ and $e\gamma$ colliders. Sensitivity of the predictions on the
possible nonperturbative gluon content of the polarised photons is analysed.
Predictions for spin dependent gluon distribution $\Delta g^{\gamma} (x,Q^2)$
are also given.


title: Out-of-equilibrium Photon Production from Disoriented Chiral Condensates

abstract:
  We study the production of photons through the non-equilibrium relaxation of
a disoriented chiral condensate. We propose that to search for non-equilibrium
photons in the direct photon measurements of heavy-ion collisions can be a
potential test of the formation of disoriented chiral condensates.


title:
Search for SUSY with R-Parity Violation at gamma-proton and
  gamma-electron colliders

abstract:
  We present an outlook for possible R-parity violating SUSY search at
gamma-proton and gamma-electron colliders. Single production of third
generation slepton/sneutrino through the lambda'-ijk couplings at a gamma-p
collider is investigated and compared with the results of the resonant sfermion
productions at the existing colliders. Also single sneutrino production at a
future gamma-electron collider through the lambda(ijk) couplings is disussed.


title: Inclusive and exclusive decays of doubly heavy baryons

abstract:
  In this paper we give a short review of the recently obtained results on
inclusive and exclusive decays of doubly heavy baryons.


title: A possible hadronic excess in psi(2S) decay and rho-pi puzzle

abstract:
  We examine the so-called rho-pi puzzle of the psi(2S) decay by incorporating
two inputs: One is the relative phase between the one-photon and the gluon
decay amplitude, and the other is a possible anomaly in the inclusive
nonelectromagnetic decay rate of psi(2S). We propose the possibility that in
the psi(2S) decay a hadronic decay process of long distance origin is important
in addition to the short-distance decay process. The amplitude of this
additional process should nearly cancel the three-gluon amplitude in the
exclusive psi(2S)---> 1-0- and turn the sum dominantly real in contrast to the
J/psi decay. We present general consequences of this mechanism and then briefly
look into two models which possibly explain the course of this additional
amplitude.


title: On the origin of current quark mass within nonperturbative QCD

abstract:
  We develop the theory of fermion induced phononlike excitations of the
instanton liquid. It suggests a mechanism of current quark mass generation
which is easily understandable by calculating the corresponding functional
integral in the tadpole approximation. We systematically study the quark
condensate excitations influenced by the phononlike modes and rederive the
relation Gell-Mann-Oakes-Renner with realistic pion mass. The picture of
$\sigma$-meson as being mixed with the soft scalar glueball-like excitation is
discussed.


title: Inclusive Heavy Hadron Decays and Light-Cone Dynamics

abstract:
  The governing role of light-cone dynamics in inclusive heavy hadron decay
processes is demonstrated. Nonperturbative QCD effects on the processes can be
systematically calculated using light-cone expansion and heavy quark effective
theory. The applications of the light-cone approach to studying electroweak and
strong interactions and hadron structure with semileptonic and radiative decays
of beauty hadrons are briefly reviewed.