title:
Solving the Schwinger-Dyson equation for a scalar propagator in
  Minkowski space

abstract:
  The Schwinger-Dyson equation for a scalar propagator is solved in Minkowski
space with the help of an integral spectral representation, both for spacelike
and timelike momenta. The equation is re-written into a form suitable for
numerical solution by iterations. This procedure is described for a simple
unphysical Lagrangian with a cubic interaction, with future extensions to more
realistic theories in mind.


title:
Associated Higgs boson production with heavy quarks at Hadron Colliders:
  impact of NLO results

abstract:
  We emphasize the role that the associated production of a Higgs boson with a
pair of top-antitop quarks can play at present and future hadron colliders.
Results of recent calculations of the NLO total cross section for the
associated production of a Standard Model like Higgs boson with a pair of
top-antitop quarks at the Tevatron (sqrt(s)=2 TeV) are presented.


title: Zee Model Confronts SNO Data

abstract:
  We reexamine the solution of the minimal Zee model by comparing with the data
of the SNO experiment, and conclude that the model is strongly disfavored but
not yet excluded by the observations. Two extensions of the Zee model are
briefly discussed both of which introduce additional freedom and can
accommodate the data.


title: Theory of CP Violation in the B-Meson System

abstract:
  Recent developments in the theory of CP violation in the B-meson system are
reviewed, with focus on the determination of sin(2beta) from B-> J/psi K
decays, its implications for tests of the Standard Model and searches for New
Physics, and the determination of gamma and alpha from charmless hadronic B
decays.


title: Lepton flavor-changing Scalar Interactions and Muon $g-2$

abstract:
  A systematic investigation on muon anomalous magnetic moment and related
lepton flavor-violating process such as $\m\to e\g$, $\t\to e\g$ and $\t\to
\m\g$ is made at two loop level in the models with flavor-changing scalar
interactions. The two loop diagrams with double scalar exchanges are studied
and their contributions are found to be compatible with the ones from Barr-Zee
diagram. By comparing with the latest data, the allowed ranges for the relevant
Yukawa couplings $Y_{ij}$ in lepton sector are obtained. The results show a
hierarchical structure of $Y_{\m e, \t e} \ll Y_{\m \t} \simeq Y_{\m\m}$ in the
physical basis if $\Delta a_{\mu}$ is found to be $>50\times 10^{-11}$. It
deviates from the widely used ansatz in which the off diagonal elements are
proportional to the square root of the products of related fermion masses. An
alternative Yukawa coupling matrix in the lepton sector is suggested to
understand the current data. With such a reasonable Yukawa coupling ansatz, the
decay rate of $\t\to \m\g$ is found to be near the current experiment upper
bound.


title: Large Solar Neutrino Mixing and Radiative Neutrino Mechanism

abstract:
  We find that the presence of a global $L_e-L_\mu-L_\tau$ ($\equiv L^\prime$)
symmetry and an $S_2$ permutation symmetry for the $\mu$- and $\tau$-families
supplemented by a discrete $Z_4$ symmetry naturally leads to almost maximal
atmospheric neutrino mixing and large solar neutrino mixing, which arise,
respectively, from type II seesaw mechanism initiated by an $S_2$-symmetric
triplet Higgs scalar $s$ with $L^\prime=2$ and from radiative mechanism of the
Zee type initiated by two singly charged scalars, an $S_2$-symmetric $h^+$ with
$L^\prime=0$ and an $S_2$-antisymmetric $h^{\prime +}$ with $L^\prime=2$. The
almost maximal mixing for atmospheric neutrinos is explained by the appearance
of the democratic coupling of $s$ to neutrinos ensured by $S_2$ and $Z_4$ while
the large mixing for solar neutrinos is explained by the similarity of $h^+$-
and $h^{\prime +}$-couplings described by $f^h_+\sim f^h_-$ and
$\mu_+\sim\mu_-$, where $f^h_+$ ($f^h_-$) and $\mu_+$ ($\mu_-$) stand for $h^+$
($h^{\prime +}$)-couplings, respectively, to leptons and to Higgs scalars.


title: Phenomenology From Lattice QCD

abstract:
  I review two subjects in which lattice simulations are making, or can make in
the future, a significant contribution to particle physics phenomenology. The
first subject is the evaluation of quantities which enter into the
determination of the vertex $A$ of the unitarity triangle from experimental
measurements of decay rates and mixing amplitudes. These quantities include the
form-factors for semileptonic B-decays, the leptonic decay constants of the $B$
and $B_s$ mesons and the $B$-parameters for $B_{d}$-$\bar B_{d}$ and
$B_{s}$-$\bar B_{s}$ mixing and the corresponding parameter for $K$-$\bar K$
mixing, $B_K$. In the second part of this talk I will review the status and
prospects for the evaluation of $K\to\pi\pi$ amplitudes and for the subsequent
study of the $\Delta I=1/2$ rule and the evaluation of
$\epsilon^\prime/\epsilon$.


title:
Scaling behavior of $(N_{ch})^{-1}dN_{ch}/d\eta$ at $\sqrt{s_{NN}} =
  130$ GeV by PHOBOS Collaboration and its analyses in terms of stochastic
  approach

abstract:
  Recently interesting data on $dN_{ch}/d\eta$ in Au-Au collisions ($\eta=-\ln
\tan (\theta/2)$) with the centrality cuts have been reported by PHOBOS
Collaboration. Their data are usually divided by the number of participants
(nucleons) in collisions. Instead of this way, using the total multiplicity
$N_{ch} = \int (dN_{ch}/d\eta)d\eta$, we find that there is scaling phenomenon
among $(N_{ch})^{-1}dN_{ch}/d\eta = dn/d\eta$ with different centrality cuts at
$\sqrt{s_{NN}} = 130$ GeV. To explain this scaling behavior of $dn/d\eta$, we
consider the stochastic approach called the Ornstein-Uhlenbeck process with two
sources. Moreover, comparisons of $dn/d\eta$ at $\sqrt{s_{NN}} = 130$ GeV with
that at $\sqrt{s_{NN}} = 200$ GeV have been made. A possible detection method
of the quark-gluon plasma (QGP) thorough $dn/d\eta$ is presented.


title: Present Status of Neutrino Mixing

abstract:
  A short review of the status of neutrino mixing and neutrino oscillations is
given. The basics of neutrino mixing and oscillations is discussed. The latest
evidences of neutrino oscillations obtained in the Super-Kamiokande and the SNO
solar neutrino experiments and in the Super-Kamiokande atmospheric neutrino
experiment are considered. The results of solar and atmospheric neutrino
experiments are discussed from the point of view of the three-neutrino mixing.


title: Three Generation Neutrino Oscillation Parameters after SNO

abstract:
  We examine the solar neutrino problem in the context of the realistic three
neutrino mixing scenario including the SNO charged current (CC) rate. The two
independent mass squared differences $\Delta m^2_{21}$ and $\Delta m^2_{31}
\approx \Delta m^2_{32}$ are taken to be in the solar and atmospheric ranges
respectively. We incorporate the constraints on $\Delta$m$^2_{31}$ as obtained
by the SuperKamiokande atmospheric neutrino data and determine the allowed
values of $\Delta m^2_{21}$, $\theta_{12}$ and $\theta_{13}$ from a combined
analysis of solar and CHOOZ data. Our aim is to probe the changes in the values
of the mass and mixing parameters with the inclusion of the SNO data as well as
the changes in the two-generation parameter region obtained from the solar
neutrino analysis with the inclusion of the third generation. We find that the
inclusion of the SNO CC rate in the combined solar + CHOOZ analysis puts a more
restrictive bound on $\theta_{13}$. Since the allowed values of $\theta_{13}$
are constrained to very small values by the CHOOZ experiment there is no
qualitative change over the two generation allowed regions in the $\Delta
m^2_{21} - \tan^2 \theta_{12}$ plane. The best-fit comes in the LMA region and
no allowed area is obtained in the SMA region at 3$\sigma$ level from combined
solar and CHOOZ analysis.


title: Bulk torsion fields in theories with large extra dimensions

abstract:
  We study the consequences of spacetime torsion coexisting with gravity in the
bulk in scenarios with large extra dimensions. Having linked torsion with the
Kalb-Ramond antisymmetric tensor field arising in string theories, we examine
its artifacts on the visible 3-brane when the extra dimensions are
compactified. It is found that while torsion would have led to parity violation
in a 4-dimensional framework, all parity violating effects disappear on the
visible brane when the torsion originates in the bulk. However, such a scenario
is found to have characteristics of its own, some of which can be
phenomenologically significant.


title:
Constraints on radion vev from the beta functions for top yukawa
  coupling and higgs self coupling in the Randall-Sundrum model

abstract:
  In this paper we determine how the beta function for the top Yukawa coupling
to one loop is modified by a light stabilized radion in the Randall-Sundrum
model. We then use this beta function together with \beta (\lambda) to
deteremine lower bounds on the radion vev <\phi> for different values of
\lambda(m_z) and m_{\phi} by demanding that both g_t(\mu) and \lambda(\mu)
should remain perturbative from m_z up ot the cut off \Lambda. We find that the
lower bounds on <\phi> that follow from the condition
\lambda(\Lambda)<\sqrt{4\pi} nearly agree with those that follow from
g_t(\Lambda)<\sqrt{4\pi}. We have also determined the critical value of <\phi>
for different values of \lambda(m_z) and m_{\phi} from the line of fixed points
which is given by \beta(g_t)=0.


title:
How Neutrino and Charged Fermion Masses Are Connected Within Minimal
  Supersymmetric SO(10)

abstract:
  Massive neutrinos are a generic prediction of SO(10), and models of
unification cry for supersymmetry. Since we have a rather detailed information
on neutrino and charged fermion masses, the real question is: how/whether it is
possible to build a SO(10) supersymmetric model, that correctly incorporates
fermion masses. We show that a simple construction is possible in the context
of a minimal theory. We concentrate on the two heaviest generations, discuss
the predictions of the model, and briefly comment on open questions.


title: The $\gamma^* \lowercase{p}$ total cross section at low x

abstract:
  The scaling in $\sigma_{\gamma^*p}(W^2, Q^2)$ cross sections (for $Q^2/W^2 <<
1$) in terms of the scaling variable $\eta = (Q^2 + m^2_0)/\Lambda^2 (W^2)$ is
interpreted in the generalized vector dominance/color-dipole picture (GVD/CDP).
The quantity $\Lambda^2 (W^2)$ is identified as the average gluon transverse
momentum absorbed by the $q \bar q$ state, $<\vec l_\bot^{~2}> = (1/6)
\Lambda^2 (W^2)$. At any $Q^2$, for $W^2 \to \infty$, the cross sections for
virtual and real photons become universal,$\sigma_{\gamma^*p}(W^2,Q^2)/
\sigma_{\gamma p} (W^2) \to 1$. The gluon density corresponding to the
color-dipole cross section in the appropriate limit is found to be consistent
with the results from QCD fits.


title:
Statistical hadronisation model and transverse momentum spectra of
  hadrons in high energy collisions

abstract:
  A detailed analysis of transverse momentum spectra of several identified
hadrons in high energy collisions within the canonical framework of the
statistical model of hadronisation is performed. The study of particle momentum
spectra requires an extension of the statistical model formalism used to handle
particle multiplicities, which is described in detail starting from a
microcanonical treatment of single hadronising clusters. Also, a new treatment
of extra strangeness suppression is presented which is based on the enforcement
of fixed numbers of ssbar pairs in the primary hadrons. The considered
centre-of-mass energies range from ~ 10 to 30 GeV in hadronic collisions
(pion-p, pp and Kp) and from ~ 15 to 35 GeV in e+e- collisions. The effect of
the decay chain following hadron generation is accurately and exhaustively
taken into account by a newly proposed numerical method. The exact p_T
conservation at low energy and the increasing hard parton emission at high
energy bound the validity of the presently taken approach within a limited
centre-of-mass energy range. However, within this region, a clear consistency
is found between the temperature parameter extracted from the present analysis
and that obtained from fits to average hadron multiplicities in the same
collision systems. This finding indicates that in the hadronisation process the
production of different particle species and their momentum spectra are two
closely related phenomena governed by one parameter.


title: Rare Kaon Decays - Overview

abstract:
  The theory of rare $K$ decays is reviewed, emphasizing short-distance
processes and the prospects to probe the physics of flavour. A brief overview
of the subject is presented, along with a more detailed discussion of the
theory of $K\to\pi\nu\bar\nu$ decays.


title: Revisiting pseudo-Dirac neutrinos

abstract:
  We study the pseudo-Dirac mixing of left and right-handed neutrinos in the
case where the Majorana masses M_L and M_R are small when compared with the
Dirac mass, M_D. The light Majorana masses could be generated by a
non-renormalizable operator reflecting effects of new physics at some high
energy scale. In this context, we obtain a simple model independent closed
bound for M_D. A phenomenologically consistent scenario is achieved with
M_L,M_R ~ 10^{-7} eV and M_D ~ 10^{-5}-10^{-4} eV. This precludes the
possibility of positive mass searches in the planned future experiments like
GENIUS or in tritium decay experiments. If on the other hand, GENIUS does
observe a positive signal for a Majorana mass \geq 10^{-3} eV, then with very
little fine tuning of neutrino parameters, the scale of new physics could be in
the TeV range, but pseudo-Dirac scenario in that case is excluded. We briefly
discuss the constraints from cosmology when a fraction of the dark matter is
composed of nearly degenerate neutrinos.


title:
Three-jet cross sections in hadron-hadron collisions at next-to-leading
  order

abstract:
  We present a new QCD event generator for hadron collider which can calculate
one-, two- and three-jet cross sections at next-to-leading order accuracy. In
this letter we study the transverse energy spectrum of three-jet hadronic
events using the kT algorithm. We show that the next-to-leading order
correction significantly reduces the renormalization and factorization scale
dependence of the three-jet cross section.


title: Penguins in B decays

abstract:
  We report on recent progress in studying two aspects of $B$ physics, in which
penguin amplitudes play an important role: (1) Bounds on penguin pollution in
$B^0(t) \to \pi^+\pi^-$ constraining CKM parameters, and a lower bound on $B^0
\to \pi^0\pi^0$ improving precision in $\sin 2\alpha$. (2) A suggestion for
measuring the photon polarization in electroweak penguin decay, $B \to
K_1(1400)\gamma$, providing a precision test of the Standard Model and a probe
for new physics.


title: SU(3) Breaking and D0-D0bar Mixing

abstract:
  The main challenge in the Standard Model calculation of the mass and width
difference in the D0-D0bar system is to estimate the size of SU(3) breaking
effects. We prove that D meson mixing occurs in the Standard Model only at
second order in SU(3) violation. We consider the possibility that phase space
effects may be the dominant source of SU(3) breaking. We find that y=(Delta
Gamma)/(2Gamma) of the order of one percent is natural in the Standard Model,
potentially reducing the sensitivity to new physics of measurements of D meson
mixing.


title: Baryogenesis with four-fermion operators in low-scale models

abstract:
  We describe a nonstandard proposal for baryogenesis in models with a low
(O(10-100)TeV) fundamental scale. The scenario has Standard Model field content
and enhanced baryon number violating operators deriving from time-dependent
fermion localization in an extra dimension. The CKM matrix provides sufficient
CP violation. The major constraints are the low reheating temperature and rate
of perturbative B-violating reactions compared to the total entropy created. A
sufficient baryon fraction may arise, but the cosmological evolution required
is likely to be somewhat contrived. Based on work in collaboration with D.J.H.
Chung.


title: Bottom Quark Fragmentation in Top Quark Decay

abstract:
  We study the fragmentation of the b quark in top decay in NLO QCD, within the
framework of perturbative fragmentation, which allows one to resum large
logarithms $\sim\log (m_t^2/m_b^2)$. We show the b-energy distribution, which
we compare with the exact ${\cal O} (\alpha_S)$ result for a massive b quark.
We use data from $e^+e^-$ machines in order to describe the b-quark
hadronization and make predictions for the energy spectrum of b-flavoured
hadrons in top decay. We also investigate the effect of NLL soft-gluon
resummation in the initial condition of the perturbative fragmentation function
on parton- and hadron-level energy distributions.


title: Detecting and Studying Higgs Bosons at a Photon-Photon Collider

abstract:
  We examine the potential for detecting and studying Higgs bosons at a
photon-photon collider facility associated with a future linear collider. Our
study incorporates realistic $\gam\gam$ luminosity spectra based on the most
probable available laser technology. Results include detector simulations. We
study the cases of: a) a SM-like Higgs boson; b) the heavy MSSM Higgs bosons;
c) a Higgs boson with no $WW/ZZ$ couplings from a general two Higgs doublet
model.


title:
Collective Deceleration of Ultrarelativistic Nuclei and Creation of
  Quark-Gluon Plasma

abstract:
  We propose a unified space-time picture of baryon stopping and quark-gluon
plasma creation in ultrarelativistic heavy-ion collisions. It is assumed that
the highly Lorentz contracted nuclei are decelerated by the coherent color
field which is formed between them after they pass through each other. This
process continues until the field is neutralized by the Schwinger mechanism.
Conservation of energy and momentum allow us to calculate the energy losses of
the nuclear slabs and the initial energy density of the quark-gluon plasma.


title: Matter in a Warped and Oscillating Background

abstract:
  We examine the role of matter in an oscillating background with a warped,
compact extra dimension. This background is compatible with an S^1/Z_2 orbifold
structure which allows chiral fermions to be included in the scenario. When the
background oscillates rapidly, the leading coupling of these oscillations is to
gauge fields rather than fermions. If the decay of these oscillations were to
occur today, it could provide an alternative mechanism for generating the ultra
high energy cosmic rays.


title:
Calculating the anomalous supersymmetry breaking in Super-Yang-Mills
  theories with local coupling

abstract:
  Supersymmetric Yang-Mills-theories with local gauge coupling have a new type
of anomalous breaking, which appears as a breaking of supersymmetry in the
Wess-Zumino-gauge. The anomalous breaking generates the two-loop order of the
gauge $\beta$-function in terms of the one-loop $\beta$-function and the
anomaly coefficient. We determine the anomaly coefficient in the
Wess-Zumino-gauge by solving the relevant supersymmetry identities. For this
purpose we use a background gauge and show that the anomaly coefficient is
uniquely determined by convergent one-loop integrals. When evaluating the
one-loop diagrams in the background gauge, it is seen that the anomaly
coefficient is determined by the Feynman-gauge value of the one-loop vertex
function to the topological term $G \tilde G$ at vanishing momenta.


title: Azimuthal Spin Asymmetries of Pion Electroproduction

abstract:
  Azimuthal spin asymmetries, both for charged and neutral pion production in
semi-inclusive deep inelastic scattering of unpolarized charged lepton beams on
longitudinally and transversely polarized nucleon targets, are analyzed and
calculated. Various assumptions and approximations in the quark distributions
and fragmentation functions often used in these calculations are studied in
detail. It is found that different approaches to the distribution and
fragmentation functions may lead to quite different predictions on the
azimuthal asymmetries measured in the HERMES experiments, thus their effects
should be taken into account before using the available data as a measurement
of quark transversity distributions. It is also found that the unfavored quark
to pion fragmentation functions must be taken into account for $\pi^-$
production from a proton target, although they can be neglected for $\pi^+$ and
$\pi^0$ production. Pion production from a proton target is suitable to study
the $u$ quark transversity distribution, whereas a combination of pion
production from both proton and neutron targets can measure the flavor
structure of quark transversity distributions.


title: Diffusion into infra-red and unitarization of the BFKL pomeron

abstract:
  The BFKL pomeron in perturbative QCD is plagued by the lack of unitarity and
diffusion into the infra-red region of gluon virtualities. These two problems
are intimately related. We perform numerical studies of the evolution equation
proposed by Balitsky and Kovchegov which unitarizes the BFKL pomeron. We show
how diffusion into the infra-red region is suppressed due to the emergence of a
saturation scale and scaling behaviour. We study universality of this
phenomenon as well as its dependence on subleading corrections to the BFKL
pomeron such as the running coupling and kinematic constraint. These
corrections are very important for phenomenological applications.


title: Systematics of q anti-q states, scalar mesons and glueball

abstract:
  Basing on the latest results of the PNPI (Gatchina) and QM&W College (London)
groups, I discuss systematics of the IJ^{PC} q anti-q states in terms of
trajectories on the (n,M^2) plane, where n is the radial quantum number and M
is its mass. In the scalar sector, which is the most interesting because of the
presence of extra states with respect to the q anti-q systematics, I discuss:
1) the results of the K-matrix analysis of the spectra pi-pi, pi-pi-pi-pi, K
anti-K, eta-eta, eta-eta', pi-eta and characteristics of the resonances in the
scalar sector, 2) q anti-q nonet classification of scalar bare states, 3)
accumulation of widths of the q anti-q states by the glueball due to the
overlapping of f_0 resonances at 1200-1700 MeV, 4) systematics of scalar q
anti-q states, both bare states and resonances, on the (n,M^2) plots, 5)
constraints on the quark-gluonium content of the resonances f_0(980),
f_0(1300), f_0(1500), f_0(1750), and the broad state f_0(1420^{+150}_{-70})
from hadronic decays, 6) radiative decays of the P-wave q anti-q resonances:
scalars f_0(980), a_0(980), and tensor mesons a_2(1320), f_2(1270), f_2(1525).
The analysis proves that in the scalar sector we face two exotic mesons: the
light sigma-meson, f_0(450), and the broad state f_0(1420^{+150}_{-70}), which
is the descendant of the glueball.


title: Non-Leptonic Two Body B Decays in QCD

abstract:
  We review the current status of theoretical study of non-leptonic two body B
decays. There are two independent directions for this purpose. One is the so
called QCD factorization approach (or BBNS approach), which is based on naive
factorization approach. The other one is named perturbative QCD approach. We
list the different ideas and applications of the two method, and make a
comparison between the two.


title: Role of gauge invariance in B -> V gamma radiative weak decays

abstract:
  The role of gauge invariance in calculating B -> V gamma radiative weak
decays is clarified. It is shown that the gauge invariance severely restricts
the contributions mediated by the usual weak non-leptonic Hamiltonian dominated
by u and c quaks with one photon attachment. Such contributions are found to be
almost negligible.


title: Neutrino Mixing and Leptonic CP Phase in Neutrino Oscillations

abstract:
  Oscillations of the Dirac neutrinos of three generations in vacuum are
considered with allowance made for the effect of the CP-violating leptonic
phase (analogue of the quark CP phase) in the lepton mixing matrix. The general
formulas for the probabilities of neutrino transition from one sort to another
in oscillations are obtained as functions of three mixing angles and the CP
phase. It is found that the leptonic CP phase can, in principle, be
reconstructed by measuring the oscillation-averaged probabilities of neutrino
transition from one sort to another. The manifestation of the CP phase as a
deviation of the probabilities of direct processes from those of inverse
processes is an effect that is practically unobservable as yet.


title: Linear Collider Signals of Anomaly Mediated Supersymmetry Breaking

abstract:
  Diagnostic signals of the minimal model of anomaly mediated supersymmetry
breaking are discussed in the context of a $\sqrt{s}$ = 1 TeV $e^+e^-$ linear
collider.


title:
Next-to-next-to-leading order QCD corrections to the photon's parton
  structure

abstract:
  The next-to-next-to-leading order (NNLO) corrections in massless perturbative
QCD are derived for the parton distributions of the photon and the deep
inelastic structure functions F_1^gamma and F_2^gamma. We present the full
photonic coefficient functions at order alpha alpha_s and calculate the first
six even-integer moments of the corresponding O(alpha alpha_s^2) photon-quark
and photon-gluon splitting functions together with the moments of the alpha
alpha_s^2 coefficient functions which enter only beyond NNLO. These results are
employed to construct parametrizations of the splitting functions which prove
to be sufficiently accurate at least for momentum fractions x >= 0.05. We also
present explicit expressions for the transformation from the MS_bar to the
DIS_gamma factorization scheme and write down the solution of the evolution
equations. The numerical impact of the NNLO corrections is discussed in both
schemes.


title: Non-Universal Gaugino Masses in Supersymmetric SO(10)

abstract:
  We consider SUSY SO(10) models in which SUSY breaking occurs via an F-term
which does not transform as an SO(10) singlet. This results in non-universal
GUT-scale gaugino masses leading to a different pattern of sparticle masses
from what is expected in the minimal supergravity model (mSUGRA). We study
three breaking chains of SO(10) down to the standard model through
SU(4)$\timesSU(2)\times$SU(2), SU(2)$\times$SO(7) and `flipped' SU(5) achieved
by the representations 54 and 210 which appear in the symmetric product of two
SO(10) adjoints. We examine the phenomenological implications of the different
boundary conditions corresponding to the different breaking chains and present
the sparticle spectrum.


title:
Chiral unitary approach to S-wave meson baryon scattering in the
  strangeness S=0 sector

abstract:
  We study the S-wave interaction of mesons with baryons in the strangeness S=0
sector in a coupled channel unitary approach. The basic dynamics is drawn from
the lowest order meson baryon chiral Lagrangians. Small modifications inspired
by models with explicit vector meson exchange in the t-channel are also
considered. In addition the pi pi N channel is included and shown to have an
important repercussion in the results, particularly in the isospin 3/2 sector.


title:
The polarised gluon density Delta G(x) from di-jet events at high energy
  ep-colliders

abstract:
  We present the potential to determine the polarised gluon density from
boson-gluon fusion processes with di-jet events at future high energy
ep-colliders. These include HERA at DESY operated with polarised electrons and
protons, polarised protons from HERA colliding on polarised electrons from a
future linear collider, and polarised protons from RHIC at BNL colliding on
electrons from a future electron accelerator.


title: Future physics with polarized ep-colliders

abstract:
  We discuss some of the physics opportunities at polarized ep-colliders.
Recent studies for polarized ep-colliders include HERA, EIC and THERA.


title: Baryons in the nonperturbative string approach

abstract:
  We present some piloting calculations of masses and short-range correlation
coefficients for the ground states of light and heavy baryons in the framework
of the simple approximation within the nonperturbative QCD approach.


title: Conservation Laws and Particle Production in Heavy Ion Collisions

abstract:
  We discuss the role of the conservation laws related with U(1) internal
symmetry group in the statistical model description of particle productions in
ultrarelativistic heavy ion collisions. We derive and show the differences in
particle multiplicities in the canonical and the grand canonical formulation of
quantum number conservation. The time evolution and the approach to chemical
equilibrium in the above ensembles is discussed in terms of kinetic master
equation. The application of the statistical model to the description of
(multi)strange particle yields at GSI/SIS and the SPS energies is also
presented.


title: Higgs plus two jet production at LHC and VLHC

abstract:
  We consider gluon-fusion and weak-boson fusion production of Higgs plus two
jets in pp collisions at sqrt{s}=14 TeV (LHC) and sqrt{s}=50, 100, 200 TeV
(VLHC). We give cross sections for Higgs masses between 115 GeV and 200 GeV,
and discuss the experimental cuts that should be applied in order to enhance
the weak-boson fusion contribution with respect to the gluon-fusion background.


title:
Extra dimensions vs. supersymmetric interpretation of missing energy
  events at a linear collider

abstract:
  The photon plus missing energy signature is a primary handle on two important
classes of theories. Theories with large extra dimensions predict the
production of photons in association with Kaluza-Klein excitations of the
graviton. In supersymmetric theories with superlight gravitinos, photons can be
produced in association with gravitino pairs. The signatures for these two
theories are compared, and it is found that they can be distinguished by
studying the photon energy distributions and scaling of the cross section with
center-of-mass energy. Both these methods fail, however, if there are six extra
dimensions. In that case, additional phenomena predicted by the theories would
be required to narrow down the underlying causes of the photon plus missing
energy signal. We also study the ability of these measurements to determine the
number of extra dimensions.


title: Physics of Higgs Factories

abstract:
  We outline the unique role of a muon collider as a Higgs factory for Higgs
boson resonance production in the $s$-channel. Physics examples include: the
precision measurements of the Higgs mass and total width, and the resulting
ability to discriminate between the SM-like Higgs bosons of different models
such as between a light SM Higgs boson and the light Higgs boson of the MSSM;
the determination of the spin and coupling via the $h\to \tautau$ decay mode;
differentiation of two nearly degenerate heavy Higgs bosons by an energy scan;
and the ability to explore a general extended Higgs sector, possibly with
CP-violating couplings. The muon collider Higgs factory could perform
measurements that would be highly complementary to Higgs studies at the LHC and
LC; it would be likely to play a very crucial role in fully understanding the
Higgs sector.


title:
$b-\tau$ Unification, $g_{\mu}-2$, the $b\to s+\gamma$ Constraint and
  Nonuniversalities

abstract:
  An analysis is given of the $b-\tau$ Yukawa coupling unification in view of
the recent result from Brookhaven on $g_{\mu}-2$ and under the constraint of
$b\to s+\gamma$. We explore $b-\tau$ unification under the above constraints
for nonuniversal boundary conditions for the soft SUSY breaking parameters. We
find new regions of the parameter space where significant negative
supersymmetric contribution to the b quark mass can arise and $b-\tau$
unification within SU(5) framework can occur with nonuniversal gaugino masses.
Specifically we find that for the case where the gaugino mass matrix transforms
like a 24 plet one finds a negative contribution to the b quark mass
irrespective of the sign of the Higgs mixing parameter $\mu$ when the
supersymmetric contribution to $g_{\mu}-2$ is positive. We exhibit regions of
the parameter space where $b-\tau$ unification occurs for $\mu>0$ satisfying
the constraints of $b\to s+\gamma$ and $g_\mu-2$. The $\mu<0$ case is also
explored. The dependence of the accuracy of $b-\tau$ unification defined by
$|\lambda_b-\lambda_{\tau}|/\lambda_{\tau}$ on the parameter space is also
investigated and it is shown that unification with an accuracy of a few percent
can be achieved in significant regions of the parameter space. The allowed
parameter space is consistent with the naturalness constraints and the
corresponding sparticle spectrum is accessible at the Large Hadron Collider.


title: Resummation of the QCD thermodynamic potential

abstract:
  It is argued why thermodynamic approximations in terms of dressed propagators
may, at larger coupling strength, be better behaved than perturbative results,
and why in hot QCD the hard thermal loop approximation of the thermodynamic
potential cannot be expected to work close to the phase transition.


title:
Charmed Hadron Production in Neutrino Reactions and Polarized s-quark
  Distribution

abstract:
  In order to obtain information about the polarized strange quark
distribution, we studied the semi-inclusive $\Lambda_c / \bar{\Lambda}_c$
production in neutrino and polarized proton collisions. We found that these
reactions are effective to clearly extract the polarization of strange quark by
measuring the spin correlation between the target proton and the produced
$\Lambda_c / \bar{\Lambda}_c$ baryon.


title: Analytic continuation and perturbative expansions in QCD

abstract:
  Starting from the divergence pattern of perturbative quantum chromodynamics,
we propose a novel, non-power series replacing the standard expansion in powers
of the renormalized coupling constant $a$. The coefficients of the new
expansion are calculable at each finite order from the Feynman diagrams, while
the expansion functions, denoted as $W_n(a)$, are defined by analytic
continuation in the Borel complex plane. The infrared ambiguity of perturbation
theory is manifest in the prescription dependence of the $W_n(a)$. We prove
that the functions $W_n(a)$ have branch point and essential singularities at
the origin $a=0$ of the complex $a$-plane and their perturbative expansions in
powers of $a$ are divergent, while the expansion of the correlators in terms of
the $W_n(a)$ set is convergent under quite loose conditions


title:
Heavy quark production at HERA in k_t factorization supplemented with
  CCFM evolution

abstract:
  The application of k_t - factorization, supplemented with the CCFM small-x
evolution equation, to heavy quark production is discussed. Differential cross
sections of b-b_bar production and also inelastic J/psi production as measured
at HERA are compared to the hadron level CCFM Monte Carlo generator CASCADE,
using the unintegrated gluon density obtained within the CCFM evolution
approach from a fit to HERA F_2 data.


title:
Kaluza-Klein States of the Standard Model Gauge Bosons: Constraints From
  High Energy Experiments

abstract:
  In theories with the standard model gauge bosons propagating in
inverse-TeV-size extra dimensions, their Kaluza-Klein states interact with the
rest of the SM particles confined to the 3-brane. We look for possible signals
for this interaction in the present high-energy collider data, and estimate the
sensitivity offered by the next generation of collider experiments. Based on
the present data from the LEP 2, Tevatron, and HERA experiments, we set a lower
limit on the extra dimension compactification scale Mc > 6.8 TeV at the 95%
confidence level (dominated by the LEP 2 results) and quote expected
sensitivities in the Tevatron Run 2 and at the LHC.


abstract:
  The Multi Module Model for Ultra-Relativistic Heavy Ion Collisions at RHIC
and LHC energies is presented. It uses the Effective String Rope Model for the
calculation of the initial stages of the reaction; the output of this model is
used as the initial state for the subsequent one-fluid calculations. It is
shown that such an initial state leads to the creation of the third flow
component. The hydrodynamical evolution of the energy density distribution is
also presented.


title: Nuclear parton distributions in the DGLAP approach

abstract:
  Determination of the nuclear parton distributions within the framework of
perturbative QCD, the DGLAP equations in particular, is discussed. Scale and
flavour dependent nuclear effects in the parton distributions are compared with
the scale and flavour independent parametrizations of HIJING and of the Hard
Probe Collaboration. A comparison with the data from deep inelastic
lepton-nucleus scattering and the Drell-Yan process in proton-nucleus
collisions is shown.


title: SUSY, Inflation and the Origin of Matter in the Universe

abstract:
  We consider the Standard Models of particle physics and hot big bang
cosmology, and review the theoretical and experimental motivations for
extending these models to include supersymmetry and inflation. An obvious
extension would be to unite these two models into a single all-encompassing
theory. We identify a list of theoretical challenges that such a theory must
address, which we illustrate with a simple model - a variant of the
next-to-minimal supersymmetric Standard Model - that addresses these
challenges.


title:
Spontaneous CP Violation in the Next-to-Minimal Supersymmetric Standard
  Model

abstract:
  We re-examine spontaneous $\cp$ violation (SCPV) at the tree level in the
context of the next-to-minimal supersymmetric standard model (NMSSM) with two
Higgs doublets and a gauge singlet field. We analyse the most general Higgs
potential without a discrete $Z_3$ symmetry, and derive an upper bound on the
mass of the lightest neutral Higgs boson. We estimate $\epsi_K$ by applying the
mass insertion approximation, finding that in order to account for the for the
observed $\cp$ violation in the neutral kaon sector a non-trivial flavour
structure in the soft-breaking $A$ terms is required and that the upper bound
on the lightest Higgs-boson mass becomes stronger. We also discuss the
implications of electric dipole moments of the electron and the neutron in SUSY
models with SCPV.


title:
Why and how to use a differential equation method to calculate
  multi-loop integrals

abstract:
  A short pedagogical introduction to a differential method used to calculate
multi-loop scalar integrals is presented. As an example it is shown how to
obtain, using the method, large mass expansion of the two loop sunrise master
integrals.


title: Collective modes in color superconducting matter

abstract:
  The properties of plasmons, Nambu-Goldstone bosons and gapless
Carlson-Goldman collective modes in color-flavor locked phase of color
superconducting dense quark matter at finite temperature are reviewed. A
possibility of a kaon condensation with an abnormal number of the NG bosons is
also discussed.


title: Numerical modelling of Bose-Einstein correlations

abstract:
  We propose extension of the algorithm for numerical modelling of
Bose-Einstein correlations (BEC), which was presented some time ago in the
literature. It is formulated on quantum statistical level for a single event
and uses the fact that identical particles subjected to Bose statistics do
bunch themselves, in a maximal possible way, in the same cells in phase-space.
The bunching effect is in our case obtained in novel way allowing for broad
applications and fast numerical calculations. First comparison with $e^+e^-$
annihilations data performed by using simple cascade hadronization model is
very encouraging.


title: Radiative rare kaon decays

abstract:
  We discuss theoretical issues in radiative rare kaon decays. The interest is
twofold: to extract useful short-distance information and understand the
underlying dynamics. We emphasize channels where either we can understand
non-perturbative aspects of QCD or there is a chance to test the Standard
Model.


title: Spin structure function g_1 at low x: status and plans

abstract:
  A brief review of measurements and expectations concerning the spin structure
function g_1 of the nucleon at low values of the scaling variable x is given.


title: Investigating the Light Scalar Mesons

abstract:
  We first briefly review a treatment of the scalars in meson meson scattering
based on a non-linear chiral Lagrangian, with unitarity implemented by a
"local" modification of the scalar propagators. It is shown that the main
results are confirmed by a treatment in the SU(3) linear sigma model in which
unitarity is implemented "globally". Some remarks are made on the speculative
subject of the scalars' quark structure.


title: The sigma-Meson Production in Excited Upsilon Decay Processes

abstract:
  We analyze the pipi production amplitudes in the excited Upsilon decay
processes, Upsilon (2S) to Upsilon (1S)pi^+pi^-, Upsilon (3S) to Upsilon
(1S)pi^+pi^- and Upsilon (3S) to Upsilon (2S)pi^+pi^-, and the pipi and KKbar
production amplitudes in the charmonium decay processes, psi (2S) to Jpsi
pi^+pi^- and Jpsi to phi pi^+pi^-, phi K^+K^-, including the possible effect of
light sigma production. The amplitudes are parametrized by the sum of
Breit-Wigner amplitudes for the sigma and the other relevant particles and of
the direct 2pi-production amplitude, following the VMW method. All the pipi
(and KKbar mass spectra are reproduced well with the obtained values of
sigma-parameters, m_sigma =526(+48,-37)MeV and Gamma_sigma =301(+145,-100)MeV,
which is almost consistent with the values in our previous phase shift
analyses.


title:
Confirmation of sigma(450--600)-Meson in Upsilon' to Upsilon pipi and
  Other pipi-Production Processes

abstract:
  Applying the effective amplitude, which is evidently consistent with general
constraints from chiral symmetry, the pipi spectra in the relevant processes
are analyzed, leading to a strong evidence for existence of the light sigma
meson. It is also pointed out that the pipi scattering process, which had been
one of the main sources for PDG table for these many years, is, in principle,
exceptionally difficult to investigate the property of sigma-meson.


title: Covariant Classification Scheme of Hadrons

abstract:
  Starting from the multi-local Klein-Gordon equations with Lorentz-scalar
squared-mass operator we give a covariant quark representation of the general
composite mesons and baryons with definite Lorentz transformation property. The
mass spectra satisfy the approximate symmetry under the tilde U(4)
transformation group, including the chiral transformation as a subgroup,
concerning the spinor freedom of light constituent quarks, and this symmetry
predicts the existence of new type of chiral mesons and baryons out of the
conventional framework in non-relativistic quark model: For example, for light
qqbar systems, the scalar sigma- and axial-vector a_1-nonets, and for
heavy-light Qqbar and qQbar systems the scalar and axial-vector mesons are
predicted to exist as relativistic S-wave states besides the ordinary P-wave
state mesons. The existence of two ``exotic'' 1^-+ meson nonets is predicted as
the relativistic P-wave states in qqbar systems. For light quark baryons the
extra 56 with positive parity and the extra 70 with negative parity of the
static SU(6) are predicted to exist as the ground state chiral particles.


title:
Property of Chiral Scalar and Axial-Vector Mesons in Heavy-Light Quark
  Systems

abstract:
  Recently we have proposed a new level-classification scheme of hadrons with a
manifestly covariant framework. In this scheme the requirement of chiral
symmetry on the light quark leads to a prediction of existence of new type of
scalars X_B, X_D and axial-vectors X_B^*,X_D^* as the chiral partners of ground
state pseudoscalar B,D and vector B^*,D^* mesons, respectively. They belong to
``relativistic S-wave states,'' and are discriminated from the conventional
P-wave mesons with j_q=1/2 appearing in the heavy quark effective theory. In
this talk we examine the properties of these chiral mesons: The mass-splittings
between the respective chiral partners are predicted to be equal, and the decay
widths of one pion emission of X_B, X_D, X_B^* and X_D^* are to take the same
value due to both chiral and heavy quark symmetries. Some experimental
indications for existence of X_B and X_D^* are also given, which are consistent
with the above prediction.


title:
Has spacetime torsion already been detected in Lorentz and CPT tests
  with spin-polarised bodies?

abstract:
  Bluhm-Kostelecky (BK) Lagrangian to test Lorentz violation with
spin-polarised test bodies is shown to be transformed to a torsion-coupling
constant Lagrangian by taking into account the Fock-Ivanenko coefficients in
spinor form. In this way one is able to introduce torsion in their Lagrangian
and make use of the value of their coupling constant to infer that torsion
maybe observed in this type of spin-polarised body experiment.The theory would
be a low-energy limit of a quasi-Riemannian gravity in Riemann-Cartan spacetime
previously proposed by Gasperini.In this theory of gravity Lorentz local gauge
symmetry is violated while global coordinate transformations are
preserved.Torsion coupling obtained in this way could be as high as $10^{-29}
GeV$.


title: Phenomenology of Generalized Higgs Boson Scenarios

abstract:
  I outline some of the challenging issues that could arise in attempting to
fully delineate various possible Higgs sectors, with focus on the minimal
supersymmetric model, a general two-Higgs-doublet model, and extensions
thereof.


title: Infrared quasi-fixed solutions in the NMSSM

abstract:
  The considerable part of the parameter space in the MSSM corresponding to the
infrared quasi fixed point scenario is almost excluded by LEP II bounds on the
lightest Higgs boson mass. In the NMSSM the mass of the lightest Higgs boson
reaches its maximum value in the strong Yukawa coupling limit when Yukawa
couplings are essentially larger than gauge ones at the Grand Unification
scale. In this limit the solutions of the renormalisation group equations are
attracted to the infrared and Hill type effective fixed lines or surfaces in
the Yukawa coupling parameter space. They are concentrated in the vicinity of
quasi fixed points for $Y_i(0)\to\infty$. However the solutions are attracted
to such points rather weakly. For this reason when all $Y_i(0)\sim 1$ the
solutions of the renormalisation group equations are gathered near a line in
the Hill type effective surface. In the paper the approximate solutions for the
NMSSM Yukawa couplings are given. The possibility of $b$--quark and
$\tau$--lepton Yukawa coupling unification at the scale $M_{X}$ is also
discussed.


title: VLHC Predictions for H to tau tau in Weak Boson Fusion

abstract:
  Higgs production in weak boson fusion with subsequent decay H to tau tau to e
mu p_T_miss provides a means to measure Higgs Yukawa couplings and Higgs
interactions to weak bosons. The potential precision of cross section
measurements at a VLHC is investigated.


title: PQCD factorizaiton of two-body B decays

abstract:
  I review the known approaches to two-body nonleptonic $B$ meson decays,
including factorization assumption, modified factorization assumption, QCD
factorization, and perturbative QCD factorization. Important phenomenological
aspects of these approaches are emphasized.


title:
Neutrino Mass Operator Renormalization in Two Higgs Doublet Models and
  the MSSM

abstract:
  In a recent re-analysis of the Standard Model (SM) beta-function for the
effective neutrino mass operator, we found that the previous results were not
entirely correct. Therefore, we consider the analogous dimension five operators
in a class of Two Higgs Doublet Models (2HDM's) and the Minimal Supersymmetric
Standard Model (MSSM). Deriving the renormalization group equations for these
effective operators, we confirm the existing result in the case of the MSSM.
Some of our 2HDM results are new, while others differ from earlier
calculations. This leads to modifications in the renormalization group
evolution of leptonic mixing angles and CP phases in the 2HDM's.


title:
Polarized parton distributions from charged-current deep-inelastic
  scattering and future neutrino factories

abstract:
  The capabilities of a neutrino factory in the determination of polarized
parton distributions from charged-current deep-inelastic scattering experiments
is discussed. We present a study of the accuracy in the determination of
polarized parton distributions that would be possible with such a facility. We
show that these measurements have the potential to distinguish between
different theoretical scenarios for the proton spin structure.


title: Correlations in hot and dense quark matter

abstract:
  We present a relativistic three-body equation to investigate three-quark
clusters in hot and dense quark matter. To derive such an equation we use the
Dyson equation approach. The equation systematically includes the Pauli
blocking factors as well as the self energy corrections of quarks. Special
relativity is realized through the light front form. Presently we use a
zero-range force and investigate the Mott transition.


title: Quark number susceptibilities from HTL-resummed thermodynamics

abstract:
  We compute analytically the diagonal quark number susceptibilities for a
quark-gluon plasma at finite temperature and zero chemical potential, and
compare with recent lattice results. The calculation uses the approximately
self-consistent resummation of hard thermal and dense loops that we have
developed previously. For temperatures between 1.5 to 5 $T_c$, our results
follow the same trend as the lattice data, but exceed them in magnitude by
about 5-10%. We also compute the lowest order contribution, of order
$\alpha_s^3\log(1/\alpha_s)$, to the off-diagonal susceptibility. This
contribution, which is not a part of our self-consistent calculation, is
numerically small, but not small enough to be compatible with a recent lattice
simulation.


title:
Peripheral heavy ion collisions as a probe of the nuclear gluon
  distribution

abstract:
  At high energies a quark-gluon plasma is expected to be formed in heavy ion
collisions at RHIC and LHC. The theoretical description of these processes is
directly associated to a complete knowledge of the details of medium effects in
the nuclear gluon distribution. In this paper we analyze the possibility to
constraint the behavior of this distribution considering peripheral heavy ion
collisions. We reanalyze the photoproduction of heavy quarks for the deduction
of the in-medium gluon distribution using three current parameterizations for
this parton distribution. Moreover, we show that the elastic photoproduction of
vector mesons is a potential process to probe the nuclear gluon distribution.


title: Predictions for ${\bar \nu} \nu \gamma$ Production at LEP

abstract:
  We study predictions for the reaction $e^+e^- \to {\bar \nu} \nu (n \gamma)$.
The complete one-loop corrections are taken into account and higher order
contributions, in particular those for the observed real photons, are added
whenever necessary. The event generator \KK MC, a general-purpose Monte Carlo
generator for the process $e^+e^- \to \bar f f n\gamma$ based on the method of
exclusive exponentiation, is used as the environment. We extend its
applicability to the process $e^+e^- \to \bar \nu_l \nu_l n\gamma$,
$l=e,\mu,\tau$, where the observation of at least a single $\gamma$ is
required. The exponentiation is implemented in much the same way as for the
s-channel process alone. In particular, all photonic effects present in the
case of W exchange, which {\it cannot} be included in the s-channel
exponentiation scheme, are calculated to a finite order only. The real hard
photon matrix element is calculated up to ${\cal O} ({\alpha^2})$. Leading
logarithmic contributions of the two-loop corrections and one-loop photonic
corrections accompanying real single photon emission are included. The
electroweak corrections are calculated with the DIZET library of the ZFITTER
package. Numerical tests and predictions for typical observables are presented.


title: Remarks on sum rules in the heavy quark limit of QCD

abstract:
  We underline a problem existing in the heavy quark limit of QCD concerning
the rates of semileptonic B decays into P-wave $D_J(j)$ mesons, where $j = {1
\over 2}$ (wide states) or $j = {3 \over 2}$ (narrow states). The leading order
sum rules of Bjorken and Uraltsev suggest $\Gamma [ \bar{B} \to D_{0,1} ({1
\over 2}) \ell \nu ] \ll \Gamma [ \bar{B} \to D_{1,2} ({3 \over 2}) \ell \nu
]$, in contradiction with experiment. The same trend follows also from a sum
rule for the subleading $1/m_Q$ curent matrix element correction $\xi_3(1)$.
The problem is made explicit in relativistic quarks models \`a la Bakamjian and
Thomas, that give a transparent physical interpretation of the latter as due,
not to a $L \cdot S$ force, but to the Wigner rotation of the light quark spin.
We point out moreover that the selection rule for decay constants of $j = {3
\over 2}$ states, $f_{3/2} = 0$, predicts, assuming the model of factorization,
the opposite hierarchy $\Gamma [ \bar{B} \to \bar{D}_{s_{1,2}} ({3 \over 2})
D^{(*)} ] \ll \Gamma [ \bar{B} \to \bar{D}_{s_{0,1}} ({1 \over 2}) D^{(*)} ]$.


title: The Anomalous Trajectories of the Pioneer Spacecraft

abstract:
  Because of their unique designs, the Pioneer 10 and 11 spacecraft have
provided the cleanest Doppler, deep-space navigation data. Analysis of this
data can be interpreted as showing an anomalous acceleration of these craft
directed towards the Sun of $a_P \sim 8 \times 10^{-8} {\rm cm/s}^2$. The
background of this discovery and the significance of the result are discussed.


title: Resonance-reggeon and parton-hadron duality in strong interactions

abstract:
  By using the concept of duality between direct channel resonances and Regge
exchanges we relate the small- and large-$x$ behavior of the structure
functions. We show that even a single resonance exhibits Bjorken scaling at
large $Q^2$.


title:
Next-to-Leading Order QCD Corrections to Spectator Effects in Lifetimes
  of Beauty Hadrons

abstract:
  Theoretical predictions of beauty hadron lifetimes, based on the heavy quark
expansion up to and including order 1/mb^2, do not to reproduce the
experimental measurements of the lifetime ratios tau(B+)/tau(Bd) and
tau(Lambdab)/tau(Bd). Large corrections to these predictions come from
phase-space enhanced 1/mb^3 contributions, i.e. hard spectator effects. In this
paper we calculate the next-to-leading order QCD corrections to the Wilson
coefficients of the local operators appearing at O(1/mb^3). We find that these
corrections improve the agreement with the experimental data. The lifetime
ratio of charged to neutral B mesons, tau(B+)/tau(Bd), turns out to be in very
good agreement with the corresponding measurement, whereas for tau(Bs)/tau(Bd)
and tau(Lambdab)/tau(Bd) there is a residual difference at the 1-sigma level.
We discuss, however, why the theoretical predictions are less accurate in the
latter cases.


title: Study of Rare $B_c^+\to D_{d,s}^{(*) +}l\bar{l}$ Decays

abstract:
  We study the rare decays of $B_c^+\to D_{q}^{(*)+}l\bar{l}$ ($q=d,s$ and
$l=\nu_l,e,\mu,\tau)$ in the standard model. The form factors are evaluated in
the light front and constituent quark models, respectively. We find that the
decay branching ratios calculated in the two models for $B_c^+\to D^+_q
l\bar{l}$ agree well with each other, whereas those for $B_c^+\to
D_q^{*+}l\bar{l}$ are different.


title:
Evolution of the Fine Structure Constant Driven by Dark Matter and the
  Cosmological Constant

abstract:
  Bekenstein's model of a scalar field, \phi, that affects the electromagnetic
permeability (usually identified with ``changing \alpha'') predicts tiny
variations of the effective fine structure constant up to very high red-shifts,
|\alpha(z=3.5)/\alpha_0-1| < 10^{-10}, when the constraints from
E\"otv\"os-Dicke-Braginsky types of experiments are imposed. We generalize this
model by allowing additional couplings of \phi to both a dark matter candidate
and to the cosmological constant. We show that in a supersymmetric
generalization of Bekenstein's model, the coupling to the LSP, which is assumed
to contribute significantly to the dark matter density, can be up to six orders
of magnitude stronger than the coupling to the baryon energy density. This
allows one to evade the present limits on the non-universality of the
gravitational attraction due to \phi-exchange and at the same time accommodate
the effective shift in \alpha at the level of \alpha(z=3.5)/\alpha_0-1 \sim
10^{-5}, reported recently from observations of quasar absorption spectra.


title: PDF uncertainties in WH production at Tevatron

abstract:
  We apply a method proposed by members of CTEQ Collaboration to estimate the
uncertainty in associated $W$-Higgs boson production at Run II of the Tevatron
due to our imprecise knowledge of parton distribution functions. We find that
the PDF uncertainties for the signal and background rates are of the order 3%.
The PDF uncertainties for the important statistical quantities (significance of
the Higgs boson discovery, accuracy of the measurement of the (WH) cross
section) are smaller (1.5%) due to the strong correlation of the signal and
background.


title: Consistency bounds on the Higgs-boson mass

abstract:
  In this talk we consider the modifications induced by heavy physics on the
triviality and vacuum stability bounds on the Higgs-boson mass. We parameterize
the heavy interactions using an effective Lagrangian and find that the
triviality bound is essentially unaffected for weakly-coupled heavy physics. In
contrast there are significant modifications in the stability bound that for a
light Higgs boson require a scale of new physics of the order of a few TeV.


title: Triviality and stability in effective theories


title: A kind of prediction from superstring model building

abstract:
  Assuming that the Standard Model of particle physics arises from the
$E_8\times E_8$ Heterotic String Theory, we try to solve the discrepancy
between the unification scale predicted by this theory ($\approx g_{GUT}\times
5.27\cdot 10^{17}$ GeV) and the value deduced from LEP experiments ($\approx
2\cdot 10^{16}$ GeV). A crucial ingredient in our solution is the presence at
low energies of three generations of supersymmetric Higgses and vector-like
colour triplets. As a by-product our analysis gives rise to a strategy which
might be useful when constructing realistic models.


title: Production and Detection of Black Holes at Neutrino Array

abstract:
  We consider the production of black holes caused by the collision between
high-energy cosmic neutrinos and nuclei contained in detectors. If the
fundamental scale M_{*} is O(TEV), as some higher-dimensional theories suggest,
ICECUBE detector may observe about 10^{4} - 10^{2} black holes per year.


title:
Muon Magnetic Dipole Moment and Higgs Mass in Supersymmetric SU(5)
  Models

abstract:
  We study the muon magnetic dipole moment and the Higgs mass in the framework
of the supersymmetric SU(5) models. In this analysis, all the relevant
parameters in the Lagrangian are taken to be free; in particular, assumption of
the universal scalar mass is not adopted. Negative search for the Higgs boson
at the LEP II experiment sets an important constraint on the supersymmetric
contribution to the muon magnetic dipole moment a_\mu(SUSY). It is shown that,
for a fixed value of the lightest Higgs mass, the maximum possible value of
a_\mu(SUSY) becomes significantly larger in the general SU(5) case compared to
the case of the universal scalar mass (i.e., the case of the so-called
``CMSSM''). We also point out that, if we take relatively large value of the
trilinear scalar couplings, the constraint from the Higgs mass is drastically
relaxed. In this case, a_\mu(SUSY) can be as large as \sim 50\times 10^{-10}
even for small value of \tan\beta (say, for \tan\beta=5).


title: Resummed event shape spectra in DIS

abstract:
  Resummed results are discussed for DIS event shape variable distributions
involving the thrust defined using the thrust axis of the current hemisphere,
the C parameter and the jet mass. The resummation of these variables requires
the development of some techniques different to those applied before for the
resummation of DIS event shapes. Including power corrections and matching a
comparison with H1 data is presented.


title: Supersymmetric Inflation, Matter and Dark Energy

abstract:
  In this talk, based on \cite{Kane:2001rb}, we emphasise that intermediate
scale supersymmetric inflation models are particularly attractive since
inflation, baryogenesis and the relic abundance of cold dark matter (CDM) are
all related by a set of parameters which also affect particle physics collider
phenomena, neutrino masses and the strong CP problem. We also point out that
the present day relic abundances of different forms of matter are (in
principle) calculable from the supersymmetric inflation model together with a
measurement of the CMB temperature and the Hubble constant. From these relic
abundances one can deduce the amount of the present day dark energy (DE)
density.


title: ZEUS NLO QCD fits

abstract:
  NLO QCD fits using the DGLAP formalism have been made to the high precision
ZEUS $e^+p$ reduced cross-section data and to fixed target structure function
data, in order to detrmine parton distribution functions and the value of
$\alpha_s(M^2_Z)$, taking full account of correlated systematic errors.
Preliminary results are reported.


title: Baryon Number Violation in Particle Decays

abstract:
  It has been argued in the past that in baryogenesis via out-of-equilibrium
decays one must consider loop diagrams that contain more than one baryon number
violating coupling. In this note we argue that the requirement with regard to
baryon number violating couplings in loop diagrams is that the interaction
between the intermediate on-shell particles and the final particles should
correspond to a net change in baryon number and that this can be satisfied even
if the loop diagram contains only one baryon number violating coupling. Put
simply, we show that to create a baryon asymmetry there should be net B
violation to the right of the `cut' in the loop diagram. This is of relevance
to some earlier works involving the out-of-equilibrium decay scenario.


title:
Results of the O(alpha_s) two-loop virtual corrections to B --> X_s l+
  l- in the standard model

abstract:
  We present the results of the O(alpha_s) two-loop virtual corrections to the
differential decay width dGamma(B -> X_s l+ l-)/ds, where s is the invariant
mass squared of the lepton pair. Those contributions from gluon bremsstrahlung
which are needed to cancel infrared and collinear singularities are also
included. Our calculation is restricted to the range 0.05 < s/mb^2 < 0.25 where
the effects from resonances are small. The new contributions drastically reduce
the renormalization scale dependence of existing results for dGamma(B->X_s l+
l-)/ds. The renormalization scale uncertainty of the corresponding branching
ratio (restricted to range mentioned above) gets reduced from +/-13% to
+/-6.5%.


title:
Muon g-2 Anomaly and Extra Interaction of Composite Higgs in a
  Dynamically Broken Electroweak Theory

abstract:
  In electroweak theory without elementary Higgs scalars existence of a
solution, which breaks initial symmetry is shown. A composite scalar doublet
serves as a substitute for usual Higgs. The mass of the surviving Higgs scalar
is predicted to be $M_H = 117 \pm 7 GeV$. The resulting theory contains
realistic $W, Z, t$ masses and composite massive Higgs. Parameters used are
$g$, $\theta_W$, cut-off $\Lambda \simeq 3500 GeV$ and triple gauge constant
$\lambda_V \simeq -0.034$. Stable nontrivial solution for extra interactions of
the Higgs particle gives contribution to muon $g-2$: $\Delta a = 49.4\cdot
10^{-10}$ that agrees with the recently reported anomaly. The extra interaction
leads to a number of experimental consequences for B.R. of Higgs decay and its
production cross-sections in $e^+e^- $ and $\bar p p$ collisions including
recommendation for looking for Higgs via decay $H \to 2 \gamma$.


title: Higgs Bosons at Muon Colliders

abstract:
  We review the role of a muon collider in the study of Higgs bosons via
production in the s-channel. Very precise measurements of a Standard Model-like
Higgs boson mass and total width can be performed, and may lead to a
discrimination between a Standard Model Higgs boson and the light Higgs boson
of the minimal supersymmetric theory. The heavier Higgs bosons from a
supersymmetric theory or an exotic Higgs sector can be studied in the
s-channel. A muon collider may play a crucial role in separating the
overlapping signals for two heavy nearly degenerate Higgs bosons, and may play
an important role in precision tests of radiative corrections in the Higgs
sector. The measurements at a muon collider will be complementary to the Higgs
studies at the Large Hadron Collider and at an electron-positron Linear
Collider.


title:
Minimal Higher-Dimensional Extensions of the Standard Model and
  Electroweak Observables

abstract:
  We consider minimal 5-dimensional extensions of the Standard Model
compactified on an $S^1/Z_2$ orbifold, in which the SU(2)$_L$ and U(1)$_Y$
gauge fields and Higgs bosons may or may not all propagate in the fifth
dimension while the observable matter is always assumed to be confined to a
4-dimensional subspace. We pay particular attention to consistently quantize
the higher-dimensional models in the generalized $R_\xi$ gauge and derive
analytic expressions for the mass spectrum of the resulting Kaluza-Klein states
and their couplings to matter. Based on recent data from electroweak precision
tests, we improve previous limits obtained in the 5-dimensional Standard Model
with a common compactification radius and extend our analysis to other possible
5-dimensional Standard-Model constructions. We find that the usually derived
lower bound of $\sim 4$ TeV on an universal compactification scale may be
considerably relaxed to $\sim 3$ TeV in a minimal scenario, in which the
SU(2)$_L$ gauge boson is the only field that feels the presence of the fifth
dimension.


title:
Crossing Symmetry Violation of Unitarized Pion-Pion Amplitude in the
  Resonance Region

abstract:
  Pion-pion scattering amplitude obtained from one-loop Chiral Perturbation
Theory (ChPT) is crossing symmetric, however the corresponding partial wave
amplitudes do not respect exact unitarity relation. There are different
approaches to get unitarized partial wave amplitudes from ChPT. Here we
consider the inverse amplitude method (IAM) that is often used to fit pion-pion
phase shifts to experimental data, by adjusting free parameters. We measure the
amount of crossing symmetry violation (CSV) in this case and we show that
crossing symmetry is badly violated by the IAM unitarized ChPT amplitude in the
resonance region. Important CSV also occurs when all free parameters are set
equal to zero.


title: Neutrino oscillation parameters from MINOS, ICARUS and OPERA combined

abstract:
  We perform a detailed analysis of the capabilities of the MINOS, ICARUS and
OPERA experiments to measure neutrino oscillation parameters at the atmospheric
scale with their data taken separately and in combination. MINOS will determine
$\Delta m^2_{32}$ and $\sin^2 2\theta_{23}$ to within 10% at the 99% C.L. with
10 kton-years of data. While no one experiment will determine $\sin^2
2\theta_{13}$ with much precision, if its value lies in the combined
sensitivity region of the three experiments, it will be possible to place a
lower bound of O(0.01) at the 95% C.L. on this parameter by combining the data
from the three experiments. The same bound can be placed with a combination of
MINOS and ICARUS data alone.


title:
Final-State Phases in Doubly-Cabibbo-Suppressed Charmed Meson
  Nonleptonic Decays

abstract:
  Cabibbo-favored nonleptonic charmed particle decays exhibit large final-state
phase differences in $\bar K \pi$ and $\bar K^* \pi$ but not $\bar K \rho$
channels. It is of interest to know the corresponding pattern of final-state
phases in doubly-Cabibbo-suppressed decays, governed by the $c \to d u \bar s$
subprocess. An experimental program is outlined for determining such phases via
measurements of rates for $D \to K^* \pi$ and $K (\rho, \omega,\phi)$ channels,
and determination of interference between bands in Dalitz plots. Such a program
is feasible at planned high-intensity sources of charmed particles.


title: Gauged Fermionic Q-balls

abstract:
  We present a new model for a non-topological soliton (NTS) that contains
interacting fermions, scalar particles and a gauge field. Using a variational
approach, we estimate the energy of the localized configuration, showing that
it can be the lowest energy state of the system for a wide range of parameters.


title:
Enhancement of the gluonic couplings of the Standard Model Higgs Boson
  through mixing

abstract:
  The mixing of the Standard Model Higgs boson with a ttbar scalar bound state
(arising from a new stronger-than-QCD interaction) can enhance the Higgs
boson's coupling to two gluons. It is possible that the two-gluon decay mode of
a light Higgs boson may even dominate. This alters the Higgs boson search
strategy at Tevatron Run 2 in a significant way. We present a simple model in
which such a scenario may be realized. The modifications to the Higgs search
signal, as well as further experimental tests of this scenario are also
discussed.


title: Tau and Charm physics highlights

abstract:
  In tau physics, we are at the frontier between the completion of the LEP
program and the start of analyses from b-factories, which are expected to
produce results in the coming years. Nice results from CLEO are steadily
delivered in the meantime. For charm, impressive progress have been achieved by
fixed target experiments in the search for CP violation and D^0 - \bar D^0
oscillations. First results from b-factories demonstrate the power of these
facilities in such areas. The novel measurement of the D* width by CLEO happens
to be rather different from current expectations. The absence of a charm
factory explains the lack or the very slow progress in the absolute scale
determinations for charm decays.


title: Heavy quark production near the threshold in QCD

abstract:
  Theoretical results for the cross section of heavy quark production near the
threshold at NNLO of NRQCD are briefly overviewed.


title:
On a Manifestation of Dibaryon Resonances in the Structure of
  Proton-Proton Total Cross-Section at Low Energies

abstract:
  A manifestation of narrow diproton resonances in the early discovered global
structure of proton-proton total cross section at low energies is discussed. It
is also discussed the existence of new particle with the mass $1.833 MeV$
predicted early.


title: The anomalous chiral Lagrangian of order $p^6$

abstract:
  We construct the effective chiral Lagrangian for chiral perturbation theory
in the mesonic odd-intrinsic-parity sector at order $p^6$. The Lagrangian
contains 24 in principle measurable terms and no contact terms for the general
case of $N_f$ light flavours, 23 terms for three and 5 for two flavours. In the
two flavour case we need a total of 13 terms if an external singlet vector
field is included. We discuss and implement the methods used to reduce to a
minimal set. The infinite parts needed for renormalization are calculated and
presented as well.


title: Production and Decay of Sneutrino and Squarks at Lepton-Hadron Colliders

abstract:
  We investigate the potentials of future high energy lepton-proton colliders
to detect supersymmetric particles in the charged current type
$lp\to\tilde\nu_l\tilde qX$, $l=e,\mu$, reactions. We also study their decays
by using the mass spectrum given in the Technical Design Report of ATLAS
Collaboration (SUGRA Point 6 corresponding to large $tan\beta$).


title: Precise predictions for e+e- --> 4f(+gamma) with anomalous couplings

abstract:
  The relevance of radiative corrections to 4f production at LEP2 and future
e+e- colliders is emphasized, and their treatment in the event generator
RacoonWW is briefly discussed. In particular, the non-universal corrections are
compared with the signature of anomalous triple gauge-boson couplings. For
4f+gamma production the influence of anomalous quartic gauge-boson couplings on
photon-energy distributions is illustrated.


title: Report on the PCaPAC 2000 Workshop

abstract:
  In October 2000, the third PCaPAC (PCs and Particle Accelerator Controls)
workshop took place at DESY. This paper presents a summary of the workshop. The
workshop reviewed existing and new PC-based accelerator control systems, from
small-scale to large-scale installations. It demonstrated convincingly the
advantage of modern, commercial mass-market products used for accelerator
controls. Disadvantages of these technologies were reported as well.
Large-scale PC systems inherently bring administrative concerns into the
picture. In this vein, special emphasis was given to system administration for
distributed systems. A major topic of the workshop was the integration of
different control system approaches as well as the integration of different
platforms within the same control system. In particular, PC-based concepts
offer the simple opportunity to interface to commercial SCADA systems. In
addition, large emphasis was given to the presentation of future developments
including the next network trends to data exchange via SOAP and XML.


title: Color Evaporation and Elastic $\Upsilon$ Photoproduction at DESY HERA

abstract:
  The diffractive photoproduction of vector mesons is usually described
considering the two-gluon (Pomeron) exchange, non-diagonal parton distributions
and the contribution of the real part to the cross section. In this letter we
analyze the diffractive photoproduction of the $\Upsilon$ at HERA using an
alternative model, the Color Evaporation Model (CEM), where the cross section
is simply determined by the boson-gluon cross section and an assumption for the
production of the colorless state. We verify that, similarly to the $J/\Psi$
case, the HERA data for this process can be well described by the CEM.
Moreover, we propose the analyzes of the ratio $R = \sigma_{\Upsilon} /
\sigma_{J/\Psi}$ to discriminate between the distinct approaches.


title: $J/\psi$ photoproduction at HERA

abstract:
  We revise and update an earlier model for $J/\psi$ photoproduction based on a
dipole Pomeron exchange. We show that the H1 and ZEUS experimental data
reported recently can be well fitted by a soft Pomeron alone.


title: Sequential Quarkonium Suppression

abstract:
  We use recent lattice data on the heavy quark potential in order to determine
the dissociation temperatures of different quarkonium states in hot strongly
interacting matter. Our analysis shows in particular that certain quarkonium
states dissociate below the deconfinement point.


title: Steps towards the QCD calculation for e+ e- --> 3 jets at NNLO

abstract:
  High precision analyses of experimental data for e+ e- annihillation, such as
determination of jet rates or event shape observables, call for complete
next-to-next-to-leading order (NNLO) perturbative QCD predictions. In this
talk, we discuss the various ingredients entering the calculation of the NNLO
corrections in e+ e- annihillation.


title:
Bootstrap equations for effective theories and the calculation of the
  $G_T/G_V$ ratio

abstract:
  A method is described for dealing with effective theories of hadron
scattering. It allows one to reduce the number of independent renormalization
prescriptions in those theories and gives a possibility to make numerical
predictions. As an illustration, we show the results of comparison with the
known data on $\pi\pi$, $\pi K$ and $\pi N$ elastic scattering. This work
presents a generalization and the further development of our results first
discussed at the MENU'99 Symposium


title: Saturation model for two-photon interactions at high energies

abstract:
  We formulate and analyse a saturation model for the total gamma gamma and
gamma* gamma* cross-sections and for the real photon structure function
F_2^gamma(x,Q^2). The model is based on a picture in which the gamma* gamma*
total cross-section for arbitrary photon virtualities is driven by the
interaction of colour dipoles, into which the virtual photons fluctuate. The
cross-section describing this interaction is assumed to satisfy the saturation
property with the saturation radius taken from the Golec-Biernat and Wusthoff
analysis of the gamma* p interaction at HERA. The model is supplemented by the
QPM and non-pomeron reggeon contributions. The model gives a very good
description of the data on the gamma gamma total cross-section, on the photon
structure function F_2^gamma(x,Q^2) at low x and on the gamma* gamma*
cross-section extracted from LEP double tagged events. Production of heavy
flavours in gamma gamma collisions is also studied. Predictions of the model
for the very high energy range which will be probed at future linear colliders
are given.


title:
Chiral dynamics and pion-nucleon scattering around the N*(1535)
  resonance

abstract:
  We study the S-wave interaction of mesons with baryons in the strangeness S=0
sector in a coupled channel unitary approach. The basic dynamics is drawn from
the lowest order meson baryon chiral Lagrangians. Small modifications inspired
by models with explicit vector meson exchange in the t-channel are also
considered. In addition the pi pi N channel is included and shown to have an
important repercussion in the results, particularly in the isospin 3/2 sector.


title:
Charming penguin contributions to charmless B decays into two
  pseudoscalar mesons

abstract:
  We present estimates of the charming penguin contribution to B => K pi, pi
pi,K eta, K eta' decays due to intermediate charmed meson states. We find that
this contribution is indeed significant for B => K pi decays, and its
inclusion, together with the tree and penguin terms, produces large branching
ratios in agreement with data, though the analysis is affected by large
theoretical uncertainties. On the other hand, for B => pi pi, K eta, K eta'
decays, the effect of the charming penguin contribution is more modest. We also
compute CP asymmetries for B => K pi, pi pi decays and we obtain rather large
results.


title: Parity Doublets from a Relativistic Quark Model

abstract:
  The Nucleon- and the Lambda-excitation spectrum exhibit parity doublets, i.e.
states of the same spin but with opposite parity being almost degenerate in
mass. It is shown that in a relativistic quark model with instantaneous
interaction kernels, where confinement is implemented by a linearly rising
potential and the major mass splittings are generated from an interaction based
on instanton effects, this degeneracy occurs quite naturally: Once the
parameters of the instanton induced interaction are fixed to reproduce the
ground state octet-decuplet splittings, some states are selectively lowered to
a position which is degenerate with states of opposite parity. Some observable
consequences are briefly discussed.


title: Pion-nucleon sigma-term - a review

abstract:
  A brief review of the pion-nucleon sigma-term is given. Aspects of both
chiral perturbation theory and phenomenology are discussed.


title:
CP violating neutrino oscillation and uncertainties in Earth matter
  density

abstract:
  We propose a statistical formulation to estimate possible errors in long
baseline neutrino oscillation experiments caused by uncertainties in the Earth
matter density. A quantitative investigation of the effect is made on the CP
asymmetry in future neutrino factory experiments.


title: A relativistic quark model of baryons

abstract:
  On the basis of the three-particle Bethe-Salpeter equation we formulated a
relativistic quark model for baryons. Assuming the propagators to be given by
their free form with constituent quark masses and the interaction kernel by an
instantaneous potential, which contains a string-like parameterization of
confinement and a flavor dependent interaction motivated by instanton effects
we can account for the major features in the baryon spectrum, such as the low
position of the Roper resonance and the occurrence of approximate parity
doublets apparent in the Nucleon- and Lambda-spectra.


title: Quasirotational Disturbances of Linear String Baryon Configuration

abstract:
  For the linear string baryon model $q$-$q$-$q$ the small disturbances of its
rotational motion (quasirotational states) are investigated. The spectrum of
these states is obtained in the form of Fourier series and the complex
eigenfrequencies are found in this spectrum. So the classic rotational motions
of the linear string baryon model are unstable (unlike the similar motions for
the string with massive ends). This instability differs from its analog for the
three-string baryon model.


title: Probing Gluons in Nuclei: the Case of $\eta'$

abstract:
  Using the recently proposed $gg --> eta'$ effective vertex, we investigate
the production of $\eta'$ from gluon fusion in $pA$ collisions. We show that
measuring $\eta'$ production cross-section at moderate $x_{\eta'}$ yields
direct information on the small $x$ gluon distribution function of the nucleus.
At RHIC, the smallest accessible $x$ turns out to be $O(10^{-5})$ and at LHC,
it is $O(10^{-8})$. Therefore, $\eta'$ is an excellent probe of the Color Glass
Condensate.


title: Beyond the Constituent Quark Model

abstract:
  Modern experiment requires a reliable theoretical framework for low energy
QCD. Some of the requirements for constructing a new model of QCD are presented
here. Progress toward these requirements are highlighted.


title: Excited Leptons at the CERN Large Hadron Collider

abstract:
  We analyze the potential of the CERN Large Hadron Collider (LHC) to search
for excited spin-1/2 electrons and neutrinos. Assuming a SU(2)_L X U(1)_Y
invariant model, we study in detail the single production of excited electrons
and neutrinos and respective backgrounds through the reactions p p -> e+ e- V
and e+- \nu V with V=photon, W, or Z. We show that the LHC will be able to
tighten considerably the direct constraints on these possible new states,
probing excited lepton masses up to 1-2 TeV depending on their couplings to
fermions and gauge bosons.


title: QCD and Rescattering in Nuclear Targets

abstract:
  We review the extension of the factorization formalism of perturbative QCD to
soft rescattering associated with hard processes in nuclei.


title: D-term challenges for supersymmetric gauged abelian flavor symmetries

abstract:
  Attention is called to potentially dangerous lepton-flavor violation (LFV)
induced by the D-terms of additional U(1) flavor-dependent gauge symmetries in
supersymmetric models. In such models, LFV persists despite an arbitrarily high
scale for the U(1) breaking and despite arbitrarily small gauge couplings. In
light of recent experimental observations of neutrino oscillations, these
models are highly motivated experimentally and theoretically. Taking into
account also the recent measurement of the muon anomalous magnetic moment,
strong bounds are calculated for the magnitude of the D-term-induced LFV. Using
current data we find that the slepton mass-mixing parameter (m_{\tilde
l_L}^2)_{12}/m_{\tilde l_L}^2 is required to be less than O(10^{-4}) -- a value
perhaps already too low compared to expectations. Near future probes will
increase sensitivity to 10^{-6}.


title: g_\mu - 2 in Supersymmetry

abstract:
  The 2.6 sigma deviation in the muon's anomalous magnetic moment has strong
implications for supersymmetry. In the most model-independent analysis to date,
we consider gaugino masses with arbitrary magnitude and phase, and sleptons
with arbitrary masses and left-right mixings. For tan(beta)=50, we find that 1
sigma agreement requires at least one charged superpartner with mass below 570
GeV; at 2 sigma, this upper bound shifts to 850 GeV. The deviation is
remarkably consistent with all constraints from colliders, dark matter, and b
-> s gamma in supergravity models, but disfavors the characteristic gaugino
mass relations of anomaly-mediation.


title: Determinations of alpha(M_Z): Comparison and Prospects

abstract:
  I review and compare various techniques to obtain the value of the QED
coupling, alpha, at the Z pole. GigaZ precisions would require a much more
accurate determination than available today. A combination of the virtues of
current methods may help to achieve this goal.


title:
Tensor susceptibility of the QCD vacuum from an effective quark-quark
  interaction

abstract:
  Treating the bilocal quark-quark interaction kernel as an input parameter,
the self-energy functions can be determined from the ``rainbow''
Dyson-Schwinger equation, which is obtained in the global color symmetry model.
The tensor susceptibility of QCD vacuum can be calculated directly from these
self-energy functions. The values we obtained are much smaller than the
estimations from QCD sum rules and from chiral constituent quark model.


title: The $\theta$-Vacua and the Leutwyler--Smilga Scaling Regime

abstract:
  The partition function of QCD is studied in the Leutwyler--Smilga scaling
regime for an arbitrary number of quark flavors and masses including the
contributions from all winding numbers. For $N_f=2$ and degenerate quark
masses, the partition function becomes independent of the quark masses at
$\theta=\pi$ and subsequently the scalar chiral condensate vanishes. There is a
discontinuity at $\theta=\pi$ in the first derivative of the energy density
with respect to $\theta$ corresponding to the first--order phase transition in
which CP is spontaneously broken, known as Dashen's phenomena. These properties
are found to be insensitive to both the pattern of chiral symmetry breaking and
the representation of the quark fields.


title: Implications from recent measurements on sin 2\beta and muon g-2

abstract:
  The recent data on CP asymmetry in $B->J/\Psi K_S$ and muon g-2 are discussed
in the framework of standard model and beyond. Possible new phase effects
besides the CKM phase are discussed in the processes concerning CP violation in
B decays and muon anomalous magnetic moment (muon g-2). It is found that the
new phases will result in difference between angles $beta$ measured from
$B->J/\Psi K_S$ and the one from global fit. The ration between them serves as
a probe of not only new physics but also new phase besides the CKM phase In the
case of muon g-2, the new phase may change the interferences between various
contributions. By including the new phases, some cancelations in the real
coupling cases can be avoided and the large value of muon g-2 observed in the
recent measurements can be understood.


title: Designer mesons for exploring factorization in b decays

abstract:
  I explain how various aspects of factorization in exclusive b decays can be
studied with mesons having a small decay constant or spin greater than one.


title:
Nonperturbative bound on high multiplicity cross sections in phi^4_3
  from lattice simulation

abstract:
  We have looked for evidence of large cross sections at large multiplicities
in weakly coupled scalar field theory in three dimensions. We use spectral
function sum rules to derive bounds on total cross sections where the sum can
be expresed in terms of a quantity which can be measured by Monte Carlo
simulation in Euclidean space. We find that high multiplicity cross sections
remain small for energies and multiplicities for which large effects had been
suggested.


title:
Elastic neutrino-electron scattering and effective couplings $(g^{\nu
  e}_V)_{LRSM}$ and $(g^{\nu e}_A)_{LRSM}$ in a Left-Right symmetric model

abstract:
  We start from a Left-Right Symmetric Model with massive Dirac neutrinos, with
an electromagnetic structure that consists of a charge radius, and we calculate
the cross-section of the scattering $\nu_{\mu}e^-\to \nu_{\mu}e^-$.
Subsequently, we calculate the simultaneous contribution of the charge radius,
of the additional $Z_{2}$ heavy gauge boson and of the mixing angle $\phi$
parameter of the model at the constants of couplings $(g^{\nu e}_{V})_{LRSM}$
and $(g^{\nu e}_{A})_{LRSM}$.


title:
Invisible charginos and neutralinos from gauge boson fusion : a way to
  explore anomaly mediation ?

abstract:
  We point out that vector boson fusion (VBF) at the Large Hadron Collider
(LHC) can lead to useful signals for charginos and neutralinos in
supersymmetric scenarios where these particles are almost invisible. The
proposed signals are just two forward jets with missing transverse energy. It
is shown that in this way one can put by far the strongest constraint on the
parameter space of a theory with anomaly mediated supersymmetry breaking (AMSB)
at the LHC. In addition, scenarios where the lightest neutralinos and charginos
are Higgsino-like can give signals of the above type.


title: Almost Pure Phase Mass Matrices from Six Dimensions

abstract:
  A model of quark masses and mixing angles is constructed within the framework
of two large extra compact dimensions. A ``democratic'' pure phase mass matrix
arises in a rather interesting way. This type of mass matrix has often been
used as a phenomenologically viable ansatz, albeit one which had very little
dynamical justification. It turns out that the idea of Large Extra Dimensions
provides a fresh look at this interesting phenomenological ansatz as presented
in this paper. Some possible interesting connections to the strong CP problem
will also be presented.


title: Explaining Anomalous CDF mu gamma Missing-E_T Events With Supersymmetry

abstract:
  CDF recently reported an excess of events in the mu-gamma-missing E_T channel
that disagrees with the Standard Model prediction. No such excess was observed
in the e-gamma-mett channel. We explain the excess via resonant smuon
production with a single dominant R-parity violating coupling lambda'_{211}, in
the context of models where the gravitino is the lightest supersymmetric
particle. The slepton decays to the lightest neutralino and a muon followed by
neutralino decaying to a gravitino and photon. We determine a viable region of
parameter space that fits the kinematical distributions of the Run I excess and
illustrate the effect by examining the best fit point in detail. We provide
predictions for an excess in the missing E_T and photon channel at Run I and
Run II. Run II will decisively rule out or confirm our scenario.


title: Quarkonium Formation at High Energy

abstract:
  The production of quarkonium in heavy ion collisions is studied at RHIC and
LHC energies. General arguments indicate that, due to initial production of
multiple quark pairs in each central collision, the final population of
quarkonium may exhibit significant enhancements over straightforward
extrapolation of behavior at SPS energy. Explicit calculations based on both a
statistical hadronization picture and a kinetic formation mechanism in a
deconfined state verify these general expectations. Such enhancements will
alter the nature of how quarkonium yields may be used as a signature of
deconfinement.


title: Unitarity of Compactified Five Dimensional Yang-Mills Theory

abstract:
  Compactified five dimensional Yang-Mills theory results in an effective
four-dimensional theory with a Kaluza-Klein (KK) tower of massive vector
bosons. We explicitly demonstrate that the scattering of the massive vector
bosons is unitary at tree-level for low energies, and analyze the relationship
between the unitarity violation scale in the KK theory and the
nonrenormalizability scale in the five dimensional gauge theory. In the
compactified theory, low-energy unitarity is ensured through an interlacing
cancellation among contributions from the relevant KK levels. Such
cancellations can be understood using a Kaluza-Klein equivalence theorem which
results from the geometric ``Higgs'' mechanism of compactification. In these
theories, the unitarity violation is delayed to energy scales higher than the
customary limit through the introduction of additional vector bosons rather
than Higgs scalars.


title: Associated neutralino-neutralino-photon production at NLC

abstract:
  We study the potential of an $e^+e^-$ linear collider to search for
neutralino-neutralino-photon production. Our analysis shows that this signal is
not viable under realistic expectations for electron beam polarization due to
large Standard Model backgrounds. Such a search would be possible only if beam
polarizations of near 100% could be achieved.


title: Critical Fluctuations at RHIC

abstract:
  On the basis of universal scaling properties, we claim that in Au+Au
collisions at RHIC, the QCD critical point is within reach. The signal turns
out to be an extended plateau of net baryons in rapidity with approximate
height of the net-baryon rapidity density approximately 15 and a strong
intermittency pattern with index s_2=1/6 in rapidity fluctuations. A window
also exists, to reach the critical point at the SPS, especially in Si+Si
collisions at maximal energy.


title:
Calculation of parity nonconservation in cesium and possible deviation
  from the Standard Model

abstract:
  We have calculated the 6s-7s parity nonconserving E1 transition amplitude
(E_{PNC}) in cesium. This calculation has been performed with higher numerical
accuracy than our 1989 calculation [V.A. Dzuba, V.V. Flambaum, and O.P.
Sushkov, Phys. Lett. A {\bf 141}, 147]. Also the Breit interaction has been
included and the radiative corrections estimated. Our final result is
E_{PNC}=0.902 (1 +/- 0.7%)iea_{B}(Q_{W}/N). This represents an improvement in
the accuracy of the calculation from the 1% error claimed in 1989. This result
corresponds to a nuclear weak charge for Cs, Q_{W}=-72.39 (1 +/- 0.4% (exp) +/-
0.7% (theory)). We conclude that there is no significant deviation from the
Standard Model value -73.09(3).


title: Correlation functions and dissipation in hot QCD

abstract:
  A recently proposed generating functional allows the construction of the full
set of n-point Green functions in QCD at high temperature and at distances
larger than 1/gT. One may then learn how the system maintains its thermal
equilibrium in the quantum field theory approach, i.e. which process
compensates for the important dissipation due to collisions. This system may be
characterized by quantities which have a classical limit. One finds that the
fluctuations of the coloured field are not gaussian ones. A comparison is made
with the semi-classical approach where a random noise is the source of
fluctuations.


title: gamma* gamma(*) to pi transitions and the pion distribution amplitude

abstract:
  We discuss what can be learned about the shape of the pion distribution
amplitude from the form factor for gamma* gamma(*) to pi transitions.


title: Quark Number Susceptibility in Hard Thermal Loop Approximation

abstract:
  We calculate the quark number susceptibility in the deconfined phase of QCD
using the hard thermal loop (HTL) approximation for the quark propagator. This
improved perturbation theory takes into account important medium effects such
as thermal quark masses and Landau damping in the quark-gluon plasma. We
explicitly show that the Landau damping part in the quark propagator for
spacelike quark momenta does not contribute to the quark number susceptibility
due to the quark number conservation. We find that the quark number
susceptibility only due to the collective quark modes deviates from that of
free one around the critical temperature but approaches free results at
infinite temperature limit. The results are in conformity with recent lattice
calculations.


title:
Form of analyzing power and the determination of the basic parameters of
  hadron scattering amplitude

abstract:
  The determination of magnitudes of basic parameters of the high energy
elastic scattering amplitude are examined at small momentum transfers with
taking account of the Coulomb-hadron interference effects.


title: QCD at High Energy

abstract:
  I review few recent QCD results in $e^+e^-$, $ep$ and $p\bar{p}$ collisions.
Furthermore, I discuss recent studies in power suppressed effects, ongoing
progress in next-to-next-to-leading QCD calculations, and some recent puzzling
results in $b$ production.


title:
New measures of the quality and of the reliability of fits applied to
  forward hadronic data at t=0

abstract:
  We develop five new statistical measures of the quality of fits, which we
combine with the usual confidence level to determine the models which fit best
all available data for total cross sections and for the real part of the
forward hadronic amplitude.


title: Cosmological Constraints on Lorentz Violation in Electrodynamics

abstract:
  Infrared, optical, and ultraviolet spectropolarimetry of cosmological sources
is used to constrain the pure electromagnetic sector of a general
Lorentz-violating standard-model extension. The coefficients for Lorentz
violation are bounded to less than 3x10^{-32}.


title: Models with Extra Dimensions and Their Phenomenology

abstract:
  The Arkani-Hamed-Dimopoulos-Dvali and the Randall-Sundrum models with extra
spacelike dimensions, recently proposed as a solution to the hierarchy problem,
are reviewed. We discuss their basic properties and phenomenological effects of
particle interactions at high energies, predicted whithin these models.


title: Extra generations and discrepancies of electroweak precision data

abstract:
  It is shown that additional chiral generations are not excluded by the latest
electroweak precision data if one assumes that there is no mixing with the
known three generations. In the case of ``heavy extra generations'', when all
four new particles are heavier than $Z$ boson, quality of the fit for the one
new generation is as good as for zero new generations (Standard Model). In the
case of neutral leptons with masses around 50 GeV (``partially heavy extra
generations'') the minimum of $\chi^2$ is between one and two extra
generations.


title:
The complementary roles of the LHC and the LC in discovering
  supersymmetry

abstract:
  We address the complementarity of the CERN Large Hadron Collider and an $e^+
e^-$ Linear Collider in determining SUSY model parameters for a particular
SO(10) SUSY GUT case study.