title:
Cosmic Rays and New Physics at the TeV: the Neutrino-Nucleon Cross
  Section

abstract:
  Ultrahigh energy neutrinos can be used to explore the physics at the TeV
scale. We study the neutrino-nucleon cross section in models with extra
dimensions and the fundamental scale at the TeV. In particular, we discuss the
production of string resonances and the gravitational interactions
(multigraviton exchange and production of microscopic black holes) in these
models. We show that the new TeV physics could give observable signals in
horizontal air showers and neutrino telescopes.


title: J/Psi production in direct and resolved gamma gamma collisions

abstract:
  The production of J/Psi mesons in gamma gamma collisions allows for a test of
factorization in color-octet processes as predicted by NRQCD and observed at
the Tevatron. We calculate the cross sections for J/Psi production with direct
and resolved photons, including also the feed-down from chi_{cJ} and Psi'
decays. Our NRQCD predictions are nicely confirmed by recent data from the
DELPHI collaboration at CERN LEP2.


title:
$\Delta M_{d,s}$, $B^0_{d,s}\to\mu^+\mu^-$ and $B\to X_s\gamma$ in
  Supersymmetry at Large $\tan\beta$

abstract:
  We present an effective Lagrangian formalism for the calculation of flavour
changing neutral and charged scalar currents in weak decays including
$SU(2)\times U(1)$ symmetry breaking effects and the effects of the electroweak
couplings $g_1$ and $g_2$. We apply this formalism to the MSSM with large
$\tan\beta$ with the CKM matrix as the only source of flavour violation, heavy
supersymmetric particles and light Higgs bosons. We give analytic formulae for
the neutral and charged Higgs boson couplings to quarks including large
$\tan\beta$ resummed corrections in the $SU(2) \times U(1)$ limit and
demonstrate that these formulae can only be used for a semi-quantitative
analysis. In particular they overestimate the effects of large $\tan\beta$
resummed corrections. We give also improved analytic formulae that reproduce
the numerical results of the full approach within $5-10%$. We present for the
first time the predictions for the branching ratios $B^0_{s,d}\to \mu^+\mu^-$
and the $B^0_{d,s}-\bar B^0_{d,s}$ mass differences $\Delta M_{d,s}$ that
include simultaneously the resummed large $\tan\beta$ corrections, $SU(2)\times
U(1)$ breaking effects and the effects of the electroweak couplings. We perform
an anatomy of the correlation between the increase of the rates of the decays
$B^0_{s,d}\to\mu^+\mu^-$ and the suppression of $\Delta M_s$, that for large
$\tan\beta$ are caused by the enhanced flavour changing neutral Higgs couplings
to down quarks. We take into account the constraint from $B\to X_s \gamma$
clarifying some points in the calculation of the large $\tan\beta$ enhanced
corrections to this decay.


title:
Fermion Mass Hierarchy and Supersymmetry Breaking in 6D SO(10) GUT on
  Orbifold

abstract:
  We suggest simple models which produce the suitable fermion mass hierarchies
and flavor mixing angles based on the 6 dimensional N=1 supersymmetric SO(10)
grand unified theory compactified on a $T^2/(Z_2 \times Z_2')$ orbifold. We
introduce extra vector-like heavy fields in the extra dimensions, and the
suitable fermion mass hierarchies and flavor mixings are generated by
integrating out these heavy fields. We consider gaugino mediation and gauge
mediation supersymmetry breaking mechanisms and their flavor structures. The
experimental constraints of small flavor changing neutral currents suggest
where to locate the supersymmetry breaking brane in the gaugino mediation
mechanism. On the other hand, the SUSY breaking masses are highly degenerated
in the gauge mediation scenario, where the flavor changing neutral currents are
naturally suppressed as in the ordinal four dimensional gauge mediation models.


title: The Cosmic Coincidence Problem in the Brane World

abstract:
  The so called `cosmic coincidence' problem seems to suggest a coupling
between dark energy and dark matter. A possibility could be given by dark
matter particles with masses depending exponentially on the scalar field
associated to dark energy. If the latter also has an exponential potential,
attractor solutions exist with constant Omega_{DM} and Omega_{DE} and negative
effective equation of state. Due to the very low mass of the dark energy field,
its coupling to baryons should be strongly suppressed. Here we present a
natural realization of this scenario in a model with large extra dimensions.


title: General massive one-loop off-shell three-point functions

abstract:
  In this work we compute the most general massive one-loop off-shell
three-point vertex in D-dimensions, where the masses, external momenta, and
exponents of propagators are arbitrary. This follows our previous paper in
which we have calculated several new hypergeometric series representations for
massless and massive (with equal masses) scalar one-loop three-point functions,
in the negative dimensional approach.


title: The Weak Mixing Angle From TeV Scale Quark-Lepton Unification

abstract:
  Unified theories based on an extended left-right symmetric group, $SU(4)
\times SU(2)^4$, are constructed in five dimensions. The compactification scale
is assumed to be only a loop factor above the weak scale, so that the weak
mixing angle is predicted to be close to its tree level value of 0.239.
Boundary conditions in the 5th dimension break $SU(4) \to SU(3) \times
U(1)_{B-L}$, removing powerful constraints from $K_L \to \mu e$ while allowing
a reliable calculation of the leading logarithm corrections to $\sin^2 \theta$.
The compactification scale is expected in the 1--5 TeV region, depending on how
$SU(2)^4$ is broken. Two illustrative models are presented, and the
experimental signal of the $Z'$ gauge boson is discussed.


title:
Solution of polynomiality and positivity constraints on generalized
  parton distributions

abstract:
  An integral representation for generalized parton distributions of spin-0
hadrons is suggested, which satisfies both polynomiality and positivity
constraints.


title:
QCD based quark description of pi-pi scattering up to the sigma and rho
  region

abstract:
  We study forward and backward pi-pi scattering within a QCD model based on
the Dyson--Schwinger, Bethe--Salpeter equations truncated to the rainbow-ladder
level. Our microscopic relativistic quark formulation preserves chiral symmetry
and reproduces the observed scattering lengths for total isospin zero, one and
two. At higher energies both scalar and vector meson resonances naturally occur
in the scattering amplitudes. We also report a comparative study with
phenomenological meson-exchange models and find such approaches are reasonable
especially near pi-pi resonances.


title: Preheating in Quintessential Inflation

abstract:
  We perform a numerical study of the preheating mechanism of particle
production in models of quintessential inflation and compare it with the usual
gravitational production mechanism. We find that even for a very small coupling
between the inflaton field and a massless scalar field, g > 10^{-9}, preheating
dominates over gravitational particle production. Reheating temperatures in the
range 10^{-2} GeV < T_{rh} < 10^{15} GeV can be easily obtained.


title: Invisible Higgs Boson Decay into Massive Neutrinos of 4th Generation

abstract:
  Results from several recent experiments provide inderect evidences in the
favor of existence of a 4th generation neutrino. Such a neutrino of mass about
50 GeV is compatible with current physical and astrophysical constraints and
well motivated in the framework of superstring phenomenology. If sufficiently
stable the existence of such a neutrino leads to the drastic change of Higgs
boson physics: for a wide range of Higgs boson masses the dominant mode of
Higgs boson decay is invisible and the branching ratios for the most promising
modes of Higgs boson search are significantly reduced. The proper strategy of
Higgs boson searches in such a framework is discussed. It is shown that in the
same framework the absence of a signal in the search for invisible Higgs boson
decay at LEP means either that the mass of Higgs is greater than 113.5 GeV or
that the mass difference between the Higgs mass and doubled neutrino mass is
small.


title:
Resummation Studies on Vector Meson Decays and Chiral Symmetry
  Spontaneously Breaking in Chiral Constituent Quark Model

abstract:
  We study on-shell decays of light vector meson resonances $\rho$, $K^*$ and
$\phi$ in the framework of chiral constituent quark model using resummation
calculations. Such studies are necessary for showing that chiral dynamics works
well at this energy scale. The effective action is derived by proper vertex
method, where resummation of all orders of momentum expansion is accomplished.
The loop effects of pseudoscalar meson are also taken into account, which play
an important role at this energy scale. The numerical results agree well with
the experimental data. A new method to explore the Chiral Symmetry
Spontaneously Breaking (CSSB) is proposed. It is found that the unitarity of
the effective meson theory resulted from resummation derivations demands an
upper-limit to the momentum of vector meson. This upper-limit, being critical
point, is just the energy scale of CSSB, and is found to be flavor-dependent.


title: Neutrino Mass Matrix with Two Zeros and Leptogenesis

abstract:
  The leptogenesis is studied in the neutrino mass matrix with two zeros, which
reduces the number of independent phases of the CP violation. These texture
zeros are decomposed into the Dirac neutrino mass matrix and the right-handed
Majorana one in the see-saw mechanism. It is found that there are six textures
for the Dirac neutrino mass matrix, among which one texture with three zeros
has three phases, three textures with four zeros have two phases, and two
textures with five zeros have only one phase in the basis with the real
right-handed Majorana mass matrix. The relation between the leptogenesis and
the low energy CP violation is discussed in typical textures. It is remarked
that the leptogenesis is linked strongly with the CP violation in the neutrino
oscillations. The predicted baryon asymmetry of the universe is consistent with
the observed value.


title: Baryon and Lepton Number Violation with Scalar Bilinears

abstract:
  We consider all possible scalar bilinears, which couple to two fermions of
the standard model. The various baryon and lepton number violating couplings
allowed by these exotic scalars are studied. We then discuss which ones are
constrained by limits on proton decay (to a lepton and a meson as well as to
three leptons), neutron-antineutron oscillations, and neutrinoless double beta
decay.


title: Jet Physics at Two-Loop Accuracy

abstract:
  Current phenomenological studies of jet observables at colliders are clearly
limited by the theoretical uncertainties inherent in the next-to-leading order
QCD description. We discuss the recent progress made towards the calculation of
QCD corrections to jet observables at the next-to-next-to-leading order in QCD
and highlight future perspectives and yet open issues.


title:
A statistical approach to the QCD phase transition --A mystery in the
  critical temperature

abstract:
  We study the QCD phase transition based on the statistical treatment with the
bag-model picture of hadrons, and derive a phenomenological relation among the
low-lying hadron masses, the hadron sizes and the critical temperature of the
QCD phase transition. We apply this phenomenological relation to both full QCD
and quenched QCD, and compare these results with the corresponding lattice QCD
results. Whereas such a statistical approach works well in full QCD, it results
in an extremely large estimate of the critical temperature in quenched QCD,
which indicates a serious problem in understanding of the QCD phase transition.
This large discrepancy traces back to the fact that enough number of glueballs
are not yet thermally excited at the critical temperature T_c \simeq 280 MeV in
quenched QCD due to the extremely small statistical factor as exp(-m_G/T_c)
\simeq 0.00207. This fact itself has a quite general nature independent of the
particular choice of the effective model framework. We are thus arrive at a
mystery, namely, what is really the trigger of the deconfinement phase
transition.


title: Chiral Susceptibility in Hard Thermal Loop Approximation

abstract:
  The static and dynamic chiral susceptibilities in the quark-gluon plasma are
calculated within the lowest order perturbative QCD at finite temperature and
the Hard Thermal Loop resummation technique using an effective quark
propagator. After regularisation of ultraviolet divergences, the Hard Thermal
Loop results are compared to QCD lattice simulations.


title:
Study of the Flavour Changing Neutral Current Decay mode $B\to K \gamma
  \gamma $

abstract:
  We study the neutral current flavour changing rare decay mode $B\to K \gamma
\gamma $ within the framework of Standard Model, including the long distance
contributions. It is found that these long distance contributions can larger
than the short distance contribution.


title:
Heavy-quarkonium creation and annihilation with O(alpha_s^3 ln(alpha_s))
  accuracy

abstract:
  We calculate the O(alpha_s^3 ln(alpha_s)) contributions to the
heavy-quarkonium production and annihilation rates. Our result sheds new light
on the structure of the high-order perturbative corrections and opens a new
perspective for a high-precision theoretical analysis. We also determine the
three-loop anomalous dimensions of the nonrelativistic vector and pseudoscalar
currents.


title: Inflation and the Theory of Cosmological Perturbations

abstract:
  These lectures provide a pedagogical introduction to inflation and the theory
of cosmological perturbations generated during inflation which are thought to
be the origin of structure in the universe.


title: Renormalization Group Summation and the Free Energy of Hot QCD

abstract:
  Using an approach developed in the context of zero-temperature QCD to
systematically sum higher order effects whose form is fixed by the
renormalization group equation, we sum to all orders the leading log (LL) and
next-to-leading log (NLL) contributions to the thermodynamic free energy in hot
QCD. While the result varies considerably less with changes in the
renormalization scale than does the purely perturbative result, a novel
ambiguity arises which reflects the strong scheme dependence of thermal
perturbation theory.


title: Covariant L-S Scheme for the effective N*NM couplings

abstract:
  For excited nucleon states $N^*$ of arbitrary spin coupling to nucleon (N)
and meson (M), we propose a Lorentz covariant orbital-spin (L-S) scheme for the
effective $N^*NM$ couplings. To be used for the partial wave analysis of
various $N^*$ production and decay processes, it combines merits of two
conventional schemes, {\sl i.e.}, covariant effective Lagrangian approach and
multipole analysis with amplitudes expanded according to angular momentum L. As
examples, explicit formulae are given for $N^*\to N\pi$, $N^*\to N\omega$ and
$\psi\to N^*\bar N$ processes which are under current experimental studies.


title:
Generalized parton distributions and strong forces inside nucleons and
  nuclei

abstract:
  We argue that generalized parton distributions (GPDs), accessible in hard
exclusive processes, carry information about the spatial distribution of forces
experienced by quarks and gluons inside hadrons. This way the measurements of
hard exclusive processes open a possibility for direct "measurements" of strong
forces in different parts of nucleons and nuclei. Also such studies open a
venue for addressing questions of the properties of the quark (gluon) matter
inside hadrons and nuclei. We give a simple example of relations between GPDs
and properties of "nuclear matter" in finite nuclei.


title: Puzzles in Hyperon, Charm and Beauty Physics

abstract:
  Puzzles awaiting better experiments and better theory include: (1) the
contradiction between good and bad SU(3) baryon wave functions in fitting
Cabibbo theory for hyperon decays, strangeness suppression in the sea and the
violation of the Gottfried Sum rule - no model fits all; (2) Anomalously
enhanced Cabibbo-suppressed $D^+ \to K^{*+}(s\bar d)$ decays; (3) anomalously
enhanced and suppressed $B \to \eta' X$ decays; (4) the OZI rule in weak
decays; (5) Vector dominance ($W \to \pi, \rho, a_1, D_s, D^*_s $) in weak
decays (6) Puzzles in doubly-cabibbo-suppressed charm decays.(7) Problems in
obtaining $\Lambda$ spin structure from polarization measurements of produced
$\Lambda$'s.


title:
Limits on the Two Higgs Doublet Model from meson decay, mixing and CP
  violation

abstract:
  Using the experimental data on meson decay rates, mixing and CP violation we
set competitive upper and lower limits to the parameter tan(beta) as a function
of the mass of the charged Higgs m_H in the Two Higgs Doublet Model (Model II).


title: Six-fermion production at e+e- colliders

abstract:
  The class of six-fermion production processes at e+e- colliders comprises
very interesting particle reactions, such as the production of top-quark pairs
and of Higgs bosons in the intermediate Higgs mass range, the scattering of
massive gauge bosons, and triple gauge-boson production. The Monte Carlo event
generator LUSIFER is designed for the analysis of such processes. A few
illustrating results obtained with LUSIFER are discussed.


title: Challenges in W-pair production

abstract:
  The investigation of W-pair production offers unique precision tests of the
electroweak theory at future e+e- colliders, including precise determinations
of cross sections, the W-boson mass, and gauge-boson self-couplings. The
state-of-the-art and future requirements in the theoretical prediction for the
reaction e+e- -> WW -> 4f(+gamma) are briefly reviewed.


title: Dark Energy as Evidence for Extra Dimensions

abstract:
  It is argued that fluctuations of quantum fields in four-dimensional space do
not give rise to dark energy, but are rather a negligible contribution to dark
matter. By (relativistic) dark matter we mean that the relation between
pressure and energy density is $p=\frac13 u$, while dark energy is
characterized by $p=-u$. A possible source of dark energy are the fluctuations
in quantum fields, including quantum gravity, inhabiting extra compactified
dimensions. These fluctuations have been computed for some simple geometries,
such as $S^2$, $S^4$, and $S^6$. If the extra dimensions are too small, they
would give rise to a dark energy larger than that observed, whereas if they are
too large they would be in conflict with experimental tests of Newton's law.
This notion suggests that the size of the extra dimensions is of order 100
$\mu$m. If the limit on the size of extra dimensions becomes lower than this
bound, extra dimensions probably do not exist, and another source for
cosmological dark energy will have to be found.


title: Analytical evaluation of certain on-shell two-loop three-point diagrams

abstract:
  An analytical approach is applied to the calculation of some
dimensionally-regulated two-loop vertex diagrams with essential on-shell
singularities. Such diagrams are important for the evaluation of QED
corrections to the muon decay, QCD corrections to top quark decays t->W^{+}b,
t->H^{+}b, etc.


title: Naturally light invisible axion and local Z_{13} times Z_3 symmetries

abstract:
  We show that by imposing local $Z_{13}\otimes Z_3$ symmetries in an
$SU(2)\otimes U(1)$ electroweak model we can implement an invisible axion in
such a way that (i) the Peccei-Quinn symmetry is an automatic symmetry of the
classical Lagrangian; and (ii) the axion is protected from semi classical
gravitational effects. In order to be able to implement such a large discrete
symmetry, and at the same time allow a general mixing in each charge sector, we
introduce right-handed neutrinos and enlarge the scalar sector of the model.
The domain wall problem is briefly considered.


title: $k_T$ factorization of exclusive processes

abstract:
  We prove $k_T$ factorization theorem in perturbative QCD (PQCD) for exclusive
processes by considering $\pi\gamma^*\to \gamma(\pi)$ and $B\to\gamma(\pi)
l\bar\nu$. The relevant form factors are expressed as the convolution of hard
amplitudes with two-parton meson wave functions in the impact parameter $b$
space, $b$ being conjugate to the parton transverse momenta $k_T$. The point is
that on-shell valence partons carry longitudinal momenta initially, and acquire
$k_T$ through collinear gluon exchanges. The $b$-dependent two-parton wave
functions with an appropriate path for the Wilson links are gauge-invariant.
The hard amplitudes, defined as the difference between the parton-level
diagrams of on-shell external particles and their collinear approximation, are
also gauge-invariant. We compare the predictions for two-body nonleptonic $B$
meson decays derived from $k_T$ factorization (the PQCD approach) and from
collinear factorization (the QCD factorization approach).


title:
Radiative Corrections to Double Dalitz Decays: Effects on Invariant Mass
  Distributions and Angular Correlations

abstract:
  We review the theory of meson decays to two lepton pairs, including the cases
of identical as well as non-identical leptons, as well as CP-conserving and
CP-violating couplings. A complete lowest-order calculation of QED radiative
corrections to these decays is discussed, and comparisons of predicted rates
and kinematic distributions between tree-level and one-loop-corrected
calculations are presented for both pi-zero and K-zero decays.


title: Traces of nonextensivity in particle physics due to fluctuations

abstract:
  We present a short review of traces of nonextensivity in particle physics due
to fluctuations.


title:
Theoretical Developments in Standard-Model Higgs Physics at a Future
  e^+e^- Linear Collider

abstract:
  We review the decay properties and production mechanisms of the
Standard-Model Higgs boson at a future e^+e^- linear collider with special
emphasis on the influence of quantum corrections. We also discuss how its
quantum numbers and couplings can be extracted from the study of appropriate
final states.


title: Hadronic physics and QCD: status and future

abstract:
  Studies of hadronic final states are entering a new phase where very precise
experimental measurements require better theoretical predictions for a
meaningful comparison. Recent results and future developments are briefly
reviewed both for the experiments and the theory.


title:
Towards the Finite Temperature Gluon Propagator in Landau Gauge
  Yang-Mills Theory

abstract:
  Yang-Mills theories undergo a deconfining phase transition at a critical
temperature. In lattice calculations the temporal Wilson loop and Z_3 order
parameter show above this temperature a behavior typical of deconfinement. A
quantity of interest in the study of this transition is the gluon propagator
and its evolution with temperature. This contribution describes the current
status of an investigation of the finite temperature gluon propagator in Landau
gauge. It analyzes the high temperature case. The resulting equations are
compared to the corresponding ones of three-dimensional Yang-Mills theory.
Under certain assumptions it is found that a kind of spatial "confinement" is
still present, even at very high temperatures.


title: A Feynman diagram analyzer DIANA: recent development

abstract:
  New developments concerning the extension of the Feynman diagram analyzer
DIANA are presented. We discuss new graphic facilities, application of DIANA to
processes with Majorana fermions and different approaches to automation of
momenta distribution.


title:
Factorizing one-loop contributions to two-loop Bhabha scattering and
  automatization of Feynman diagram calculations

abstract:
  In higher order calculations a number of new technical problems arise: one
needs diagrams in arbitrary dimension in order to obtain their needed
$\epsilon$-expansion, zero Gram determinants appear, renormalization produces
diagrams with `dots' on the lines, i.e. higher order powers of scalar
propagators. All these problems cannot be accessed by the `standard'
Passarino-Veltman approach: there is not available what is needed for higher
loops. We demonstrate our method of how to solve these problems.


title:
Neutrino Democracy, Fermion Mass Hierarchies And Proton Decay From 5D
  SU(5)

abstract:
  The explanation of various observed phenomena such as large angle neutrino
oscillations, hierarchies of charged fermion masses and CKM mixings, and
apparent baryon number conservation may have a common origin. We show how this
could occur in 5D SUSY SU(5) supplemented by a ${\cal U}(1)$ flavor symmetry
and additional matter supermultiplets called 'copies'. In addition, the proton
decays into $p\to K\nu $, with an estimated lifetime of order $10^{33}-10^{36}$
yrs. Other decay channels include $Ke$ and $K\mu $ with comparable rates. We
also expect that BR$(\mu \to e\gamma)\sim $BR$(\tau \to \mu \gamma)$.


title:
Neutrino Physics from Charged Higgs and Slepton Associated Production in
  AMSB

abstract:
  In the Minimal Supersymmetric Standard Model with bilinear R-Parity
violation, terms that violate R-Parity and lepton number are introduced in the
superpotential, and sneutrino vacuum expectation values are induced. As a
result, neutrino masses and mixing angles are generated via a low energy
see-saw mechanism. We show that this model embedded into an anomaly mediated
supersymmetry breaking scenario is testable at a linear collider using charged
Higgs boson production in association with a stau. This is possible in regions
of parameter space where the charged Higgs and stau have similar mass,
producing an enhancement of the charged scalar mixing angles. We show that the
bilinear parameter and the sneutrino vev can be determined from charged scalar
observables, and estimate the precision of this determination.


title:
Next-to-leading Order Calculations of the Radiative and Semileptonic
  Rare B Decays in the Standard Model and Comparison with Data

abstract:
  We review some selected rare B decays calculated in next-to-leading order
accuracy in the Standard Model (SM). These include the radiative decays $B \to
(X_s,K^*,\rho)\gamma$ and the semileptonic decays $B \to (X_s,K,K^*) \ell^+
\ell^-$, for which new data from the BABAR and BELLE collaborations have been
presented at this conference. SM is in agreement with the current measurements
within the theoretical and experimental errors. The impact of rare B-decays on
the CKM phenomenology is quantitatively discussed.


title: Connection between the elastic GEp/GMp and P to Delta form factors

abstract:
  It is suggested that the falloff in Qsq of the P to Delta magnetic form
factor GM* is related to the recently observed falloff of the elastic electric
form factor GEp/GMp. Calculation is carried out in the framework of a GPD
mechanism.


title:
QCD effective action with dressing functions - consistency checks in the
  perturbative regime

abstract:
  In a previous paper, we presented solution to the Slavnov--Taylor identity
for the QCD effective action, and argued that the action terms containing
(anti)ghost fields are unique. These terms have the same form as those in the
classical action, but the gluon and (anti)ghost effective fields are convoluted
with gluon and ghost dressing functions G_A and G_c, the latter containing
perturbative and nonperturbative effects (but not including the soliton-like
vacuum effects). In the present work we show how the perturbative QCD (pQCD)
can be incorporated into the framework of this action, and we present explicit
one-loop pQCD expressions for G_A and G_c. We then go on to check the
consistency of the obtained results by considering an antighost
Dyson--Schwinger equation (DSE). By solving the relations that result from the
Legendre transformation leading to the effective action, we obtain the
effective fields as power expansions of sources. We check explicitly that the
aforementioned one-loop functions G_A and G_c fulfil the antighost DSE at the
linear source level. We further explicitly check that these one-loop G_A and
G_c have the regularization-scale and momentum dependence consistent with the
antighost DSE at the quadratic source level. These checks suggest that the the
effective action with dressing functions represents a consistent framework for
treating QCD, at least at the one-loop level.


title: EXO: the Enriched Xenon Observatory for Double Beta Decay

abstract:
  EXO is a search for neutrinoless double beta decay in 136Xe. An active R&D
program for a 10 ton, enriched 136Xe liquid phase detector is now underway.
Current research projects are: decay product extraction, Xe purity studies,
energy resolution studies, and Ba+ ion laser-tagging. By extracting and
laser-tagging the Xe decay product (136Ba) and optimizing the energy resolution
in liquid Xe, half lives of up to 5.0x10^28yr will be ultimately probed,
corresponding to a sensitivity to Majorana n masses > ~10meV.


title: Proton Stability in Leptoquark Models

abstract:
  We show that in generic leptoquark (LQ) extensions of the standard model
lepton and baryon numbers are broken at the level of renormalizable operators.
In particular, this may cause fast proton decay unless the leptoquarks are
heavy enough. We derive stringent bounds for the 1st generation LQ masses and
couplings from the proton stability constraints.


title:
An SU(5) SUSY Model with R-Parity Violation and Radiatively Induced
  Neutrino Masses

abstract:
  The radiatively induced neutrino mass matrix is investigated on the basis of
an SU(5) SUSY model. In order to evade the proton decay, an ansatz based on a
discrete symmetry $Z_2$ is assumed: although, at the unification scale, we have
two types of superfields $\Psi_{L(\pm)}=\bar{5}_{L(\pm)}+10_{L(\pm)}$, which
are transformed as $\Psi_{L(\pm)} \to \pm \Psi_{L(\pm)}$ under the discrete
symmetry Z$_2$, the particles $\Psi_{L(+)}$ are decoupled after the SU(5)
symmetry is broken, so that our quarks and leptons belong to \Psi_{L(-)}. The
R-parity-violating terms for our quarks and leptons \Psi_{L(-)} are basically
forbidden under the symmetry Z_2. However, we assume that mixings between
members of \Psi_{L(+)} and those of \Psi_{L(-)} are in part caused after SU(5)
is broken. As a result, the R-parity-violating interactions are in part
allowed, so that the neutrino masses are radiatively generated, while the
proton decay due to the R-parity violating terms is still forbidden because the
term d_R^c d_R^c u_R^c has z=-1.


title:
Strange and singlet form factors of the nucleon: Predictions for G0, A4,
  and HAPPEX-II experiments

abstract:
  We investigate the strange and flavor-singlet electric and magnetic form
factors of the nucleon within the framework of the SU(3) chiral quark-soliton
model. Isospin symmetry is assumed and the symmetry-conserving SU(3)
quantization is employed, rotational and strange quark mass corrections being
included. For the experiments G0, A4, and HAPPEX-II we predict the quantities
$G^{0}_E + \beta G^{0}_M$ and $G^{\rm s}_E + \beta G^{\rm s}_M$. The dependence
of the results on the parameters of the model and the treatment of the Yukawa
asymptotic behavior of the soliton are investigated.


title: Resummation for single-spin asymmetries in W boson production

abstract:
  To measure spin-dependent parton distribution functions in the production of
W bosons at the Relativistic Heavy Ion Collider, an accurate model for
distributions of charged leptons from the W boson decay is needed. We present
single-spin lepton-level cross sections of order $\alpha_S$ for this process,
as well as resummed cross sections, which include multiple parton radiation
effects. We also present a program RhicBos for the numerical analysis of
single-spin and double-spin cross sections in the Drell-Yan process, W and Z
boson production.


title:
Unitarized pion-nucleon scattering amplitude from inverse amplitude
  method

abstract:
  In a recent work on low energy pion-nucleon scattering, instead of using
chiral perturbation theory (ChPT) amplitude, we started from a pion-nucleon
{\it soft-pion} result and used elastic unitarity directly as a dynamical
constraint to construct first-order unitarity corrected amplitudes. The
resulting amplitudes are crossing symmetric but, as the ChPT ones, satisfy only
approximate unitarity relation. In the present work, we reconsider our approach
and we apply the inverse amplitude method (IAM) in order to access the energy
resonance region. We present the resulting S- and P-wave phase shifts that are
shown to be in qualitative agreement with experimental data.


title: Oscillation Physics with a Neutrino Factory

abstract:
  A generation of neutrino experiments have established that neutrinos mix and
probably have mass. The mixing phenomenon points to processes beyond those of
the Standard Model, possibly at the Grand Unification energy scale. A extensive
sequence of of experiments will be required to measure precisely all the
parameters of the neutrino mixing matrix, culminating with the discovery and
study of leptonic CP violation. As a first step, extensions of conventional
pion/kaon decay beams, such as off-axis beams or low-energy super-beams, have
been considered. These could yield first observations of $\nu_\mu \to \nu_e$
transitions at the atmospheric frequency, which have not yet been observed, and
a first measurement of $\theta_{13}$. Experiments with much better flux control
can be envisaged if the neutrinos are obtained from the decays of stored
particles. One such possibility is the concept of beta beams provided by the
decays of radioactive nuclei, that has been developed within the context of
these studies. These would provide a pure (anti-)electron-neutrino beam of a
few hundred MeV, and beautiful complementarity with a high-intensity,
low-energy conventional beam, enabling experimental probes of T violation as
well as CP violation. Ultimately, a definitive and complete set of measurements
would offered by a Neutrino Factory based on a muon storage ring. This powerful
machine offers the largest reach for CP violation, even for very small values
of $\theta_{13}$.


title: The NuTeV Anomaly, Neutrino Mixing, and a Heavy Higgs Boson

abstract:
  Recent results from the NuTeV experiment at Fermilab and the deviation of the
Z invisible width, measured at LEP/SLC, from its Standard Model (SM) prediction
suggest the suppression of neutrino-Z couplings. Such suppressions occur
naturally in models which mix the neutrinos with heavy gauge singlet states. We
postulate a universal suppression of the Z-nu-nu couplings by a factor of
(1-epsilon) and perform a fit to the Z-pole and NuTeV observables with epsilon
and the oblique correction parameters S and T. Compared to a fit with S and T
only, inclusion of epsilon leads to a dramatic improvement in the quality of
the fit. The values of S and T preferred by the fit can be obtained within the
SM by a simple increase in the Higgs boson mass. However, if the W mass is also
included in the fit, a non-zero U parameter becomes necessary which cannot be
supplied within the SM. The preferred value of epsilon suggests that the seesaw
mechanism may not be the reason why neutrinos are so light.


title: Particle Physics in Intense Electromagnetic Fields

abstract:
  The quantum field theory in the presence of classical background
electromagnetic fields is reviewed. We give a pedagogical introduction to the
Feynman-Furry method of describing non-perturbative interactions with very
strong electromagnetic fields. A particular emphasis is given to the case of
the plane-wave electromagnetic field for which the charged particles' wave
functions and propagators are presented. Some general features of quantum
processes proceeding in the intense electromagnetic background are argued. We
also discuss the possibilities of searching new physics through the
investigations of quantum phenomena induced by the strong electromagnetic
environment.


title: Hard Thermal Loops and QCD Thermodynamics

abstract:
  The conventional weak-coupling expansion for thermodynamic quantities in hot
field theories shows poor convergence unless the coupling constant is tiny. I
discuss screened perturbation theory (SPT) which is a way of reorganizing the
perturbative expansion for scalar theories %by adding and subtracting a local
mass term in the Lagrangian, and hard-thermal-loop perturbation theory (HTLPT),
which is its generalization to gauge theories. I present results for the
pressure to three loops in SPT and to two loops in HTLPT. We compare the latter
with three- and four-dimensional lattice simulations of pure-glue QCD.


title: Exotic SUSY scenarios

abstract:
  In this talk I discuss some scenarios which involve small extensions of the
ideas usually considered in the Minimal Supersymmetric Standard Model (MSSM). I
present results of a study of the implication of non-universal gaugino masses
(NGM) for the invisible decays of the lightest scalar and the correlation of
the same with the relic density of the lightest supersymmetric particle (LSP)
in the Universe. Further I discuss SUSY with \rpv. Decay of $\tilde \chi_1^0$
in the case of dominant \rpv and \LV, trilinear $\lambda$ and $\lambda'$
couplings, and also that of $\tilde \chi_1^0, \tilde \chi_1^+$ caused by the
bilinear \rpv, \LV couplings are discussed. The effect of the latter for the
trilepton signal at the Tevatron is presented. I end with a discussion of
signals of Heavy Majorana Neutrinos (HMN) at the LHC.


title: Mu-Tau Reflection Symmetry in Lepton Mixing and Neutrino Oscillations

abstract:
  We examine the possibility that the lepton mixing matrix may exhibit a strong
form of mu-tau universality, in which corresponding elements of the mu- and
tau-neutrino flavour eigenstates have equal moduli, and find that it is
consistent with present data on neutrino oscillations. We point out that in the
Dirac case, this is equivalent to symmetry under mu-tau reflection, ie. the
combined operation of mu-tau flavour exchange in the MNS matrix with a CP
transformation on the whole leptonic sector. We give the most general form for
such a mixing matrix, examine the lepton mass matrices under such a symmetry,
and explore the observable manifestations of the symmetry in neutrino
oscillations.


title: PQCD approach to exclusive B decays

abstract:
  I review the recent progress on the perturbative QCD approach to exclusive
$B$ meson decays, discussing the comparison of collinear and $k_T$
factorizations, the CP asymmetry in the $B^0\to\pi^+\pi^-$ decay, penguin
enhancement, the branching ratio of the $B^0\to D^0\pi^0$ decay, and three-body
nonleptonic decays.


title:
eett6f v. 1.0, A program for top quark pair production and decay into 6
  fermions at linear colliders

abstract:
  The first version of a computer program "eett6f" for calculating cross
sections of e+e- -> 6 fermions processes relevant for a t\bar{t}-pair
production and decay at centre of mass energies typical for linear colliders is
presented. "eett6f v.~1.0" allows for calculating both the total and
differential cross sections at tree level of the Standard Model. The program
can be used as the Monte Carlo generator of unweighted events as well.


title: Approximating chiral quark models with linear sigma-models

abstract:
  We study the approximation of chiral quark models with simpler models,
obtained via gradient expansion. The resulting Lagrangian of the type of the
linear sigma-model contains, at the lowest level, an additional term with two
derivatives. We investigate the dynamical consequences of this term and its
relevance to the phenomenology of the soliton models of the nucleon. It is
found that the inclusion of the new term allows for a more efficient
approximation of the underlying quark theory, especially in those cases where
dynamics allows for a large deviation of the chiral fields from the chiral
circle, such as in quark models with non-local regulators.


title:
Potential Nonrelativistic QCD and Heavy Quarkonium Spectrum in
  Next-to-Next-to-Next-to-Leading Order

abstract:
  In this talk I review the calculation of the third order corrections to the
heavy quarkonium spectrum in the nonrelativistic effective theory framework and
its application to the phenomenology of top quark threshold production.


title: Relativistic Turbulence: A Long Way from Preheating to Equilibrium

abstract:
  We study, both numerically and analytically, the development of equilibrium
after preheating. We show that the process is characterised by the appearance
of Kolmogorov spectra and the evolution towards thermal equilibrium follows
self-similar dynamics. Simplified kinetic theory gives values for all
characteristic exponents which are close to what is observed in lattice
simulations. The resulting time for thermalization is long, and temperature at
thermalization is low, $T \sim 100$ eV in the simple $\lambda \Phi^4$
inflationary model. Our results allow a straightforward generalization to
realistic models.


title: Power-like abundance of elements in Universe

abstract:
  The apparently observed power-like abundance of elements in Universe is
discussed in more detail with special emphasis put on the strangelets.


title: Mirror model for sterile neutrinos

abstract:
  Sterile neutrinos are studied as subdominant contribution to solar neutrino
physics. The mirror-matter neutrinos are considered as sterile neutrinos. We
use the symmetric mirror model with gravitational communication between mirror
and visible sectors. This communication term provides mixing between visible
and mirror neutrinos with the basic scale mu=v^2/M_Pl=5*10^-6 eV, where v=174
GeV is the vacuum expectation value of the standard electroweak group and M_Pl
is the Planckian mass. It is demonstrated that each mass eigenstate of active
neutrinos splits into two states separated by small Delta m^2. Unsuppressed
oscillations between active and sterile neutrinos nu_a --> nu_s occur only in
transitions between each of these close pairs (``windows''). These oscillations
are characterized by very small Delta m^2 and can suppress the flux and distort
spectrum of pp-neutrinos in detectable way. The other observable effect is
anomalous seasonal variation of neutrino flux, which appears in LMA solution.
The considered subdominant neutrino oscillations nu_a <--> nu_s can reveal
itself as big effects in observations of supernova neutrinos and high energy
(HE) neutrinos. In the case of HE neutrinos they can provide a very large
diffuse flux of active neutrinos unconstrained by the e-m cascade upper limit.


title: Exploration of the MSSM with Non-Universal Higgs Masses

abstract:
  We explore the parameter space of the minimal supersymmetric extension of the
Standard Model (MSSM), allowing the soft supersymmetry-breaking masses of the
Higgs multiplets, m_{1,2}, to be non-universal (NUHM). Compared with the
constrained MSSM (CMSSM) in which m_{1,2} are required to be equal to the soft
supersymmetry-breaking masses m_0 of the squark and slepton masses, the Higgs
mixing parameter mu and the pseudoscalar Higgs mass m_A, which are calculated
in the CMSSM, are free in the NUHM model. We incorporate accelerator and dark
matter constraints in determining allowed regions of the (mu, m_A), (mu, M_2)
and (m_{1/2}, m_0) planes for selected choices of the other NUHM parameters. In
the examples studied, we find that the LSP mass cannot be reduced far below its
limit in the CMSSM, whereas m_A may be as small as allowed by LEP for large tan
\beta. We present in Appendices details of the calculations of
neutralino-slepton, chargino-slepton and neutralino-sneutrino coannihilation
needed in our exploration of the NUHM.


title: Branching Ratios of $B \to D_s K$ Decays in Perturbative QCD Approach

abstract:
  The rare decays $B^0 \to D_s^- K^+$ and $B^+ \to D_s^+ \bar{K}^0$ can occur
only via annihilation type diagrams in the standard model. We calculate these
decays in perturbative QCD approach. We found that the calculated branching
ratio of $B^0 \to D_s^- K^+$ agreed with the data which had been observed in
the KEK and SLAC $B$ factories. While the decay $B^+ \to D_s^+ \bar{K}^0$ has a
very small branching ratio at ${\cal O}(10^{-8})$, due to the suppression from
CKM matrix elements $|V_{ub}^* V_{cd}|$.


title:
b-tau unification and large atmospheric mixing: a case for non-canonical
  see-saw

abstract:
  We study the second and third generation masses in the context of the minimal
renormalizable SO(10) theory. We show that if the see-saw takes the
non-canonical (type II) form, large atmospheric neutrino mixing angle requires
b-tau unification.


title: Four-fermion simulation at LEP2 in DELPHI

abstract:
  We present and discuss the generator setup for e+e- -> 4f processes chosen by
the DELPHI collaboration. The need to combine the most recent theoretical
achievements in the CC03 sector with the state of the art description of the
remaining part of the 4-fermion processes has led to an original combination of
different codes, with the WPHACT 2.0 4-fermion generator and the YFSWW code for
the CC03 O(alpha) corrections as a starting point. The coverage of the
4-fermion phase space is discussed in detail, with particular attention to
ensuring the compatibility of WPHACT with dedicated gamma-gamma generators.


title: Vacuum structure and high-energy scattering

abstract:
  This short review deals with the manifestations of the vacuum structure of
non-Abelian gauge theories in high-energy scattering. Specifically, it
concentrates on instanton-induced hard scattering processes, both in the
electroweak gauge theory and in QCD. Soft scattering processes in QCD and their
connection to models of semi-hard vacuum fluctuations are also briefly
discussed.


title:
Leading Chiral Logarithms to the Hyperfine Splitting of the Hydrogen and
  Muonic Hydrogen

abstract:
  We study the hydrogen and muonic hydrogen within an effective field theory
framework. We perform the matching between heavy baryon effective theory
coupled to photons and leptons and the relevant effective field theory at
atomic scales. This matching can be performed in a perturbative expansion in
alpha, 1/m_p and the chiral counting. We then compute the O(m_{l_i}^3
alpha^5/m_p^2 x logarithms) contribution (including the leading chiral
logarithms) to the Hyperfine splitting and compare with experiment. They can
explain about 2/3 of the difference between experiment and the pure QED
prediction when setting the renormalization scale at the rho mass. We give an
estimate of the matching coefficient of the spin-dependent proton-lepton
operator in heavy baryon effective theory.


title:
Higgs-boson production associated with a bottom quark at hadron
  colliders with SUSY-QCD corrections

abstract:
  The Higgs boson production p p (p\bar p) -> b h +X via b g -> b h at the LHC,
which may be an important channel for testing the bottom quark Yukawa coupling,
is subject to large supersymmetric quantum corrections. In this work the
one-loop SUSY-QCD corrections to this process are evaluated and are found to be
quite sizable in some parameter space. We also study the behavior of the
corrections in the limit of heavy SUSY masses and find the remnant effects of
SUSY-QCD. These remnant effects, which are left over in the Higgs sector by the
heavy sparticles, are found to be so sizable (for a light CP-odd Higgs and
large \tan\beta) that they might be observable in the future LHC experiment.
The exploration of such remnant effects is important for probing SUSY,
especially in case that the sparticles are too heavy (above TeV) to be directly
discovered at the LHC.


title: New physics searches at a Linear Collider with polarized beams

abstract:
  A future e+e- Linear Collider has a large physics potential for the discovery
of new physics beyond the Standard Model and precision studies of the Standard
Model itself. It is well suited to complement and extend the physics program of
the LHC concerning the precise determination of the underlying theory. The use
of polarized beams at a LC will be one of the decisive tools.


title: HERWIG 6.5 Release Note

abstract:
  A new release of the Monte Carlo program HERWIG (version 6.5) is now
available. The main new features are: support for the Les Houches interface to
matrix element generators; additional SM and MSSM Higgs processes in lepton
collisions; additional matrix elements for the spin correlation algorithm; a
new version of the ISAWIG interface; interface to the MC@NLO program for heavy
quark, Higgs and vector boson production in hadron collisions. boson pair
production in hadron collisions. This is planned to be the last major release
of Fortran HERWIG. Future developments will be implemented in a new C++ event
generator, HERWIG++.


title:
Transverse Momentum in Semi-Inclusive Polarized Deep Inelastic
  Scattering and the Spin-Flavor Structure of the Proton

abstract:
  The non-valence spin-flavor structure of the nucleon extracted from
semi-inclusive measurements of polarized deep inelastic scattering depends
strongly on the transverse momentum of the detected hadrons which are used to
determine the individual polarized sea distributions. This physics may explain
the recent HERMES observation of a positively polarized strange sea through
semi-inclusive scattering, in contrast to the negative strange sea polarization
deduced from inclusive polarized deep inelastic scattering.


title: Presence On Earth of Non-Identical Particles

abstract:
  We speculate on some novel consequences possibly associated with a change of
elementary particle constants with time. These concern the question as to
whether particles reaching the earth from distant parts of the universe reflect
their properties at their point of origin and so can be different from local
particles. Assuming that such particles would be present in very high energy
cosmic rays, we estimate their density on the earth by two different methods,
finding on this hypothesis a density of roughly $10^{-28}-10^{-29}$. Various
possibilities for detection are discussed, including the formation of unusual
nuclear isotopes.


title: Chiral symmetry restoration in hadron spectra

abstract:
  The evidence and the theoretical justification of chiral symmetry restoration
in high-lying hadrons is presented.


title: Quarkonium production in deep-inelastic scattering

abstract:
  We discuss the inclusive production of J/psi mesons in deep-inelastic
scattering (DIS) via the electromagnetic, weak neutral, and charged currents
within the factorization formalism of nonrelativistic quantum chromodynamics.
Theoretical predictions are confronted with experimental data of e p and nu N
DIS taken by the H1 Collaboration at DESY HERA and the CHORUS Collaboration at
CERN, respectively.


title: Are light sneutrinos buried in LEP data?

abstract:
  Supersymmetry may resolve the disagreement between the precision electroweak
data and the direct limit on the higgs mass, if there are light sneutrinos in
the mass range 55 GeV $ < m_{\snu} < $ 80 GeV. Such sneutrinos should decay
invisibly with 100% branching ratio and contribute to the $\gamma$ + missing
energy signal, investigated by all the LEP groups. It is shown that while the
data accumulated by a single group may not be adequate to reveal such
sneutrinos, a combined analysis of the data collected by all four groups will
be sensitive to $m_{\snu}$ in the above range. If no signal is found a lower
bound on $m_{\snu}$ stronger than that obtained from the $Z$-pole data may
emerge.


title: Two-color QCD in 3D at finite baryon density

abstract:
  We study the low energy phase structure of SU(2) gauge theories in
three-dimensional spacetime, at finite baryon density. The pseudoreality of
representations of SU(2) permits an analytic study of a real baryon chemical
potential, and the restriction to 3D results in a different global symmetry
breaking pattern from the corresponding 4D model studied previously by Kogut et
al. We find a second-order phase transition separating the normal phase and the
baryon superconducting phase. The chemical potential dependence of condensates
and baryon density are computed. We find that the phase structure and the
excitation spectrum are essentially the same as in 4D, despite the different
symmetry groups, indicating a universality that is rooted in the properties of
Riemannian symmetric spaces.


title: Optimizations for the Computation of Radiative Corrections

abstract:
  Two methods are presented with which the CPU time spent on the calculation of
radiative corrections can be significantly reduced. The first is the
parallelization of the program, which can be surprisingly simple to implement
under certain circumstances often met in the calculation of radiative
corrections. The second is the efficient direct calculation of fermion chains.
The latter not only improves the overall performance of the program, but
introduces better conceptual clarity as well, as it allows for a homogeneous
treatment of bosonic and fermionic amplitudes.


title: CEEX Exponentiation in QED

abstract:
  The aim is to summarize briefly on:
  (a) Main features of YFS Cohenetn Exclusive EXponentiation in QED,
  (b) Examples of recent results relevant for LEP/LC physics program.


title:
Transverse flow and hadro-chemistry in Au+Au collisions at
  \sqrt{s_{NN}}=200 GeV

abstract:
  We present a hydrodynamic assessment of preliminary particle spectra observed
in Au+Au collisions at \sqrt{s_{NN}}=200 GeV. The hadronic part of the
underlying equation of state is based on explicit conservation of (measured)
particle ratios throughout the resonance gas stage after chemical freezeout by
employing chemical potentials for stable mesons, nucleons and anti-nucleons. We
find that under these conditions the data (in particular the proton spectra)
favor a low freeze-out temperature of around 100 MeV. Furthermore we show that
through inclusion of a moderate pre-hydrodynamic transverse flow field the
shape of the spectra improves with respect to the data. The effect of the
initial transverse boost on elliptic flow and the freeze-out geometry of the
system is also elucidated.


title: Stabilizing dilaton and baryogenesis

abstract:
  Entropy production by the dilaton decay is studied in the model where the
dilaton acquires potential via gaugino condensation in the hidden gauge group.
Its effect on the Affleck-Dine baryogenesis is investigated with and without
non-renormalizable terms in the potential. It is shown that the baryon
asymmetry produced by this mechanism with the higher-dimensional terms is
diluted by the dilaton decay and can be regulated to the observed value.


title: A New Decoupling Theorem in Top-Quark Physics

abstract:
  Angular distribution of a secondary particle in top-quark production/decay is
studied in a simple and general manner. It is shown that the distribution does
not depend on any possible anomalous top-quark-decay interactions whatever the
production mechanism is when certain well-justified conditions are satisfied.
Some analyses using the final- state lepton are presented as an example of its
application.


title: Fermion Dipole Moments from R-parity Violating Parameters

abstract:
  We have developed an efficient formulation for the study of the generic
supersymmetric standard model, which admits all kind of R-parity violating
terms. Using the formulation, we discuss all sources of fermion dipole moment
contributions from R-parity violating, or rather lepton number violating,
parametersand the constraints obtained. Stringent constraints comparable to
those from neutrino masses are resulted in some cases.


title:
Approximations to the QED Fermion Green's Function in a Constant
  External Field

abstract:
  An exact representation of the causal QED fermion Green's function, in an
arbritrary external electromagnetic field, derived by Fried, Gabellini and
McKellar, and which naturally allows for non-perturbative approximations, is
here used to calculate non-perturbative approximations to the Green's function
in the simple case of a constant external field. Schwinger's famous exact
result is obtained as the limit as the order of the approximation approaches
infinity.


title:
Phase Structure of Hot and/or Dense QCD with the Schwinger-Dyson
  Equation

abstract:
  We investigate the phase structure of hot and/or dense QCD using the
Schwinger-Dyson equation (SDE) with the improved ladder approximation in the
Landau gauge. We show that the phase transition from the two-flavor color
superconducting (2SC) phase to the quark-gluon plasma (QGP) phase is of second
order, and that the scaling properties of the Majorana mass gap and the diquark
condensate are consistent with mean field scaling. We examine the effect of the
antiquark contribution and find that setting the antiquark Majorana mass equal
to the quark one is a good approximation in the medium density region. We also
study the effect of the Debye screening mass of the gluon and find that
ignoring it causes the critical lines to move to the region of higher
temperature and higher chemical potential.


title: Production and Polarization Effects in Some Tau-Lepton Decays

abstract:
  The conditions for the independence of decays of the spin-1/2 resonances on
the production mechanism of the resonances and on polarizations of the incoming
and outgoing particles are derived and applied in the case of several
tau-lepton decays. The necessity for inclusion of the influence of the
production mechanism in the evaluation of the lepton flavour violating decays
is stressed.


title: Spin and hard processes

abstract:
  It is argued that spin is a fundamental aspect of gauge theories at short
distances. As a consequence there are characteristic helicity asymmetries in
hard inclusive and exclusive reactions of which a few are discussed.


title:
The Minimal Left-Right Symmetric Model and Radiative Corrections to the
  Muon Decay

abstract:
  A self-consistent version of the left-right (LR) symmetric model is used to
examine tree- as well as one-loop level radiative corrections to the muon
decay. It is shown that constraints on the heavy sector of the model parameters
are different when going beyond tree-level physics. In fact, in our case, the
only useful constraints on the model can be obtained from the one-loop level
calculation. Furthermore, corrections coming from the subset of SM particles
within the LR model have a different structure from their SM equivalent, e.g.
the top quark leading term contribution to $\Delta \rho$ within the LR model is
different from its SM counterpart. As a consequence, care must be taken in
fitting procedures of models beyond the SM, where usually, only tree-level
couplings modified by the SM radiative corrections are considered. This
procedure is not always correct.


title:
Bounds on the derivatives of the Isgur-Wise function from sum rules in
  the heavy quark limit of QCD

abstract:
  Using the OPE and the trace formalism, we have obtained a number of sum rules
in the heavy quark limit of QCD that include the sum over all excited states
for any value $j^P$ of the light cloud. We show that these sum rules imply that
the elastic Isgur-Wise function $\xi (w)$ is an alternate series in powers of
$(w-1)$. Moreover, we obtain sum rules involving the derivatives of the elastic
Isgur-Wise function $\xi (w)$ at zero recoil, that imply that the $n$-th
derivative can be bounded by the $(n-1)$-th one. For the curvature $\sigma^2 =
\xi''(1)$, this proves the already proposed bound $\sigma^2 \geq {5 \over 4}
\rho^2$. Moreover, we obtain the absolute bound for the $n$-th derivative
$(-1)^n \xi^{(n)}(1) \geq {(2n+1)!! \over 2^{2n}}$, that generalizes the
results $\rho^2 \geq {3 \over 4}$ and $\sigma^2 \geq {15 \over 16}$.


title:
CP-violating Majorana phases, lepton-conserving processes and final
  state interactions

abstract:
  The CP-violating phases associated with Majorana neutrinos can give rise to
CP-violating effects even in processes that conserve total Lepton number, such
as \mu -> eee+, \mu + e -> e + e and others. After explaining the reasons that
make this happen, we consider the calculation of the rates for the process of
the form \ell_a + \ell_b -> \ell_a + \ell_c, and its conjugate \bar\ell_a +
\bar\ell_b -> \bar\ell_a + \bar\ell_c, where \ell_a, \ell_b and \ell_c denote
charged leptons of different flavors. In the context of the Standard Model with
Majorana neutrinos, we show that the difference in the rates depends on such
phases. Our calculations illustrate in detail the mechanics that operate behind
the scene, and set the stage for carrying out the analogous, more complicated
(as we explain), calculations for other processes such as \mu -> eee+ and its
conjugate.


title: Sum rules in the heavy quark limit of QCD

abstract:
  In the leading order of the heavy quark expansion, we propose a method within
the OPE and the trace formalism, that allows to obtain, in a systematic way,
Bjorken-like sum rules for the derivatives of the elastic Isgur-Wise function
$\xi(w)$ in terms of corresponding Isgur-Wise functions of transitions to
excited states. A key element is the consideration of the non-forward
amplitude, as introduced by Uraltsev. A simplifying feature of our method is to
consider currents aligned along the initial and final four-velocities. As an
illustration, we give a very simple derivation of Bjorken and Uraltsev sum
rules. On the other hand, we obtain a new class of sum rules that involve the
products of IW functions at zero recoil and IW functions at any $w$. Special
care is given to the needed derivation of the projector on the polarization
tensors of particles of arbitrary integer spin. The new sum rules give further
information on the slope $\rho^2 = - \xi '(1)$ and also on the curvature
$\sigma^2 = \xi '' (1)$, and imply, modulo a very natural assumption, the
inequality $\sigma^2 \geq {5\over 4} \rho^2$, and therefore the absolute bound
$\sigma^2 \geq {15 \over 16}$.


title:
Universal description of S-wave meson spectra in a renormalized
  light-cone QCD-inspired model

abstract:
  A light-cone QCD-inspired model, with the mass squared operator consisting of
a harmonic oscillator potential as confinement and a Dirac-delta interaction,
is used to study the S-wave meson spectra. The two parameters of the harmonic
potential and quark masses are fixed by masses of rho(770), rho(1450), J/psi,
psi(2S), K*(892) and B*. We apply a renormalization method to define the model,
in which the pseudo-scalar ground state mass fixes the renormalized strength of
the Dirac-delta interaction. The model presents an universal and satisfactory
description of both singlet and triplet states of S-wave mesons and the
corresponding radial excitations.


title: Analytical properties of the photon propagator and confinement in QED3

abstract:
  Analytical properties of the photon propagator in QED3 in the
N^1-approximation are considered. It is noticed that in given approximation if
the dynamical fermions mass is nonzero this propagator has a single pole at the
point k^2=0 and a branch point at k^2=-4m^2 (m is the fermion mass). When m=0,
the propagator gets the pole at the spacelike domain of the variable k^2. It
witnesses the unstability of the state conforming to the photon and leads to
the screening of the source field at r speeds to infinity. The approximation by
the rational function of the photon propagator containing the vacuum loops with
massive fermions proposed by Gusynin, Hams and Reenders is shown to lead to the
pole and the branch point at k^2=0 and to the pole in the spacelike domain as
well. The arguments in favour of the statement that the presence of the
dynamical fermions mass leads in QED3 to the confinement irrespectively of any
approximation, are given.


title: The Colour Glass Condensate

abstract:
  I review the physical and mathematical foundations for the theoretical
description of the hadron wavefunction at small $x$ as a Colour Glass
Condensate. In this context, I discuss the phenomenon of gluon saturation and
some of its remarkable consequences: a new ``geometric scaling'' for $F_2$,
which has been recently identified at HERA, and the unitarization of the
hadronic cross-sections at high energy. I show that by combining saturation and
confinement one obtains cross-sections which saturate the Froissart bound.


title: Twist-3 effects in deeply virtual Compton scattering made simple

abstract:
  We show that electromagnetic gauge invariance requires a 'spin rotation' of
the quarks in the usual twist-2 contribution to the amplitude for deeply
virtual Compton scattering. This rotation is equivalent to the inclusion of
certain kinematical twist-3 (Wandzura-Wilczek type) terms, which have been
derived previously using other methods. The new representation of the twist-3
terms is very compact and allows for a simple physical interpretation.


title:
Integral representations for nonperturbative GPDs in terms of
  perturbative diagrams

abstract:
  An integral representation is suggested for generalized parton distributions
which automatically satisfies the polynomiality and positivity constraints.
This representation has the form of an integral of perturbative triangle
diagrams over the masses of three propagators with an appropriate weight
depending on these masses. An arbitrary D term can be added.


title: Gell-Mann - Low Function in QED for the arbitrary coupling constant

abstract:
  The Gell-Mann -- Low function \beta(g) in QED (g is the fine structure
constant) is reconstructed. At large g, it behaves as \beta_\infty g^\alpha
with \alpha\approx 1, \beta_\infty\approx 1.


title: Deconstructing Dimensional Deconstruction

abstract:
  Dimensional deconstruction (DD) abstracts from higher dimensional models
features of related 4--dimensional ones. DD was proposed in Refs.[1,2,3] as a
scheme for constructing models of {\it naturally} light composite Higgs boson.
These are models in which--{\it without fine--tuning of parameters}--the
composite Higgs's mass M and vacuum expectation value v are much lighter than
its binding energy scale \Lambda. We review the basic idea of DD. It is easy to
arrange M << \Lambda. We show, however, that DD fails to give v << \Lambda in a
model that is supposed to contain a naturally light composite Higgs [4].


title: Surface reheating as a new paradigm

abstract:
  In this talk we briefly review the standard idea of reheating and then
present a new paradigm of reheating the Universe through surface evaporation.


title:
Black hole, string ball, and $p$-brane production at hadronic
  supercolliders

abstract:
  In models of large extra dimensions, the string and Planck scales become
accessible at future colliders. When the energy scale is above the string scale
or Planck scale a number of interesting phenomena occur, namely, production of
stringy states, $p$-branes, string balls, black hole, etc. In this Proceedings,
we summarize a recent work \cite{me0} on the production of black holes, string
balls, and $p$-branes at hadronic supercolliders, and discuss their signatures.


title: SU(3) Predictions of $B\to PP$ Decays in the Standard Model

abstract:
  With SU(3) symmetry one only needs 13 hadronic parameters to describe $B\to
PP$ decays in the Standard Model. When annihilation contributions are
neglected, only 7 hadronic parameters are needed. These parameters can be
determined from existing experimental data and some unmeasured branching ratios
and CP asymmetries of the type $B\to PP$ can be predicted. In this talk we
present SU(3) predictions of branching ratios and CP asymmetries for $B\to PP$
decays in the Standard Model.


title: High Energy Astrophysical Tau Neutrinos: The Expectations

abstract:
  Aspects related to production, propagation and prospects for observationsof
high energy astrophysical tau neutrinos originating from some
representativeextra terrestrial sources such as atmosphere of earth, our
galactic plane as well as possibly from distantsites of gamma ray bursts in the
energy range 10^3 < E\GeV < 10^11 are reviewed.


title: Degenerate vacua as the origin of the dark energy

abstract:
  I propose a new mechanism to account for the observed tiny but finite dark
energy in terms of a non-Abelian Higgs theory, which has infinitely many
perturbative vacua characterized by a winding number, in the framework of
inflationary cosmology without introducing any tiny numbers.


title: Radiative corrections in a minimal extension of the standard model

abstract:
  Radiative corrections are studied within an extension of the standard model,
containing extra singlet scalars. The calculations determine the effect of a
large width of the Higgs boson on radiative corrections. They throw some light
on the treatment of unstable particles inside loop-graphs.


title: Quark-hadron-duality in the charmonium and upsilon system

abstract:
  In this work we discuss the practical and conceptual issues related to
quark-hadron-duality in heavy-heavy systems. Recent measurements in the
charmonium region allow a direct test of quark-hadron-duality. We present a
formula for non-resonant background production in e^+ e^- \to D{\bar D} and
extract the resonance parameters of the \psi(3S)-\psi(6S). The obtained results
are used to investigate the upsilon energy range.


title:
Subleading Light-cone distributions functions in the decays Lambda(b)
  --> X(s) Gamma and Lambda(b) --> X(u) Lepton Anti-Nu

abstract:
  In this paper we investigate the subleading twist corrections to the photon
energy spectrum in the decay Lambda_b -> X_s \gamma and to the lepton energy
spectrum in Lambda_b -> X_u l \bar{\nu}. As a first step we rederive the
matching coefficients of the subleading twist using a much simpler method.
Parametrizing the matrix elements for Lambda_b and using reparametrization
invariance, we show that the energy spectra close to the endpoints are given in
terms of only a single universal function.


title:
Evidence for a narrow sigma(770) resonance and its suppression in pipi
  scattering from measurements of pi(-)p->pi(-)pi(+)n on polarized target at
  17.2 GeV/c

abstract:
  We present a new model independent amplitude analysis of reaction
pi(-)p->pi(-) pi(+)n measured at CERN at 17.2 GeV/c on polarized target using a
Monte Carlo method for dipion mass 580-1080 MeV. The two solutions for measured
moduli |Sbar|^2 and |S|^2 of the two S-wave transversity amplitudes Sbar and S
show res onant behaviour below 800 MeV corresponding to a scalar resonance
sigma(770). Simultaneous fits to |Sbar|^2 and |S|^2 include f_0(980). The CERN
data on polar ized target supplemented by the assumption of analyticity of
production amplitud es in dipion mass allow to determine the helicity
amplitudes S_0 (a_1 exchange) and S_1 (pi exchange) from fitted transversity
amplitudes. The sign ambiguity in sigma(770) contribution leads to 2 solutions.
In the "down" solution sigma(770) is suppressed in the helicity flip amplitude
S_1 and thus also in pi(-)pi(+)-> pi(-)pi(+) scattering. Most contribution of
sigma(770) to pion production is in the nonflip amplitude S_0, or in
pi(-)a_1(+)->pi(-)pi(+) scattering. In the "up" solution the situation is
reversed. The "up" solution is excluded by unitarity in pipi scattering. The
"down" solution, and thus the evidence for sigma(770), is in agreement with
unitarity in both pi(-)pi(+)->pi(-)pi(+) and pi(-)a_1(+)-> pi(-)pi(+)
scattering. There are 4 "down" solutions (1, 1bar), (2, 1bar), (1, 2bar) and
(2, 2bar). The sigma(770) resonance manifests itself as a broad resonant
structure at ~ 720 MeV in the flip amplitude |S_1|^2 in solutions (1, 1bar) and
(2, 1bar). The contribution of sigma(770) to |S_1|^2 is small in solutions (1,
2bar) and (2, 2bar). The metamorphosis of a narrow sigma(770) in the nonflip
amplitude S_0 into a broad resonant structure in the flip amplitude S_1 is a
new phenomenon related to breaking of scale and chiral symmetry in QCD.


title: Central and Non-central HBT from AGS to RHIC

abstract:
  We review the status of particle interferometry in ultra-relativistic
nucleus-nucleus collisions. The theoretical focus is on the model-independent
space-time interpretation of HBT radius parameters and its extension to the
geometrical and dynamical asymmetries generated in finite impact parameter
collisions. On the experimental side, we give a complete account of all
presently available data for beam energies above 2 AGeV. We discuss what these
data imply for the dynamics and space-time extension of the collision region
and for the condition under which particles decouple from this region.


title: Phases and CP Violation in SUSY

abstract:
  We discuss CP violation in supersymmetric theories and show that CP phenomena
can act as a probe of their origins, i.e., compactification and spontaneous
supersymmetry breaking. CP violation as a probe of the flavor structure of
supersymmetric theories is also discussed. A brief overview is given of several
low energy phenomena where CP phases can produce new effects. These include
important CP effects in processes involving sparticles and CP mixing effects in
the neutral Higgs boson system. We also discuss the possibility of violations
of scaling in the electric dipole moments (EDMs) due to the presence of
nonuniversalities and show that with inclusion of nonuniversalities the muon
EDM could be up to 1-2 orders of magnitude larger than implied by scaling and
within reach of the next generation of experiments. Thus the EDMs are an
important probe of the flavor structure of supersymmetric theories.


title:
MC-TESTER: a universal tool for comparisons of Monte Carlo predictions
  for particle decays in high energy physics

abstract:
  Theoretical predictions in high energy physics are routinely provided in the
form of Monte Carlo generators. Comparisons of predictions from different
programs and/or different initialization set-ups are often necessary. MC-TESTER
can be used for such tests of decays of intermediate states (particles or
resonances) in a semi-automated way. Our test consists of two steps. Different
Monte Carlo programs are run; events with decays of a chosen particle are
searched, decay trees are analysed and appropriate information is stored. Then,
at the analysis step, a list of all found decay modes is defined and branching
ratios are calculated for both runs. Histograms of all scalar Lorentz-invariant
masses constructed from the decay products are plotted and compared for each
decay mode found in both runs. For each plot a measure of the difference of the
distributions is calculated and its maximal value over all histograms for each
decay channel is printed in a summary table. As an example of MC-TESTER
application, we include a test with the tau lepton decay Monte Carlo
generators, TAUOLA and PYTHIA. The HEPEVT (or LUJETS) common block is used as
exclusive source of information on the generated events.


title:
Supersymmetric effects on heavy charged Higgs boson production in hadron
  colliders

abstract:
  The production of a heavy supersymmetric charged Higgs boson (M_{H^{\pm}}>
200 GeV) at the Tevatron and at the LHC is studied. We include the leading
one-loop quantum effects within the MSSM in the relevant high \tan\beta region.
Whereas the chances for the Tevatron are limited, and critically depend on the
size of the unknown NLO QCD effects, at the LHC the discovery range is more
comfortable and may extend the reach above M_{H^{\pm}}= 1 TeV.


title: Extra Dimensions at the Weak Scale and Deviations from Newtonian Gravity

abstract:
  We consider theories in which the Standard Model gauge fields propagate in
extra dimensions whose size is around the electroweak scale. The Standard Model
quarks and leptons may either be localized to a brane or propagate in the bulk.
  This class of theories includes models of Scherk-Schwarz supersymmetry
breaking and universal extra dimensions. We consider the problem of stabilizing
the volume of the extra dimensions. We find that for a large class of
stabilization mechanisms the field which corresponds to fluctuations of the
volume remains light even after stabilization, and has a mass in the $10^{-3}$
eV range. In particular this is the case if stabilization does not involve
dynamics at scales larger than the cutoff of the higher dimensional Standard
Model, and if the effective theory below the compactification scale is four
dimensional. The mass of this field is protected against large radiative
corrections by the general covariance of the higher dimensional theory and by
the weakness of its couplings, which are Planck suppressed. Its couplings to
matter mediate forces whose strength is comparable to that of gravity and which
can give rise to potentially observable deviations from Newton's Law at
sub-millimeter distances. Current experiments investigating short distance
gravity can probe extra dimensions too small to be accessible to current
collider experiments. In particular for a single extra dimension stabilized by
the Casimir energy of the Standard Model fields compactification radii as small
as 5 inverse TeV are accessible to current sub-millimeter gravity experiments.


title: String Theory, Unification and Supersymmetry

abstract:
  One cannot yet point to any firm string prediction. While many approximate
string ground states are known with interesting properties, we do not have any
argument that one or another describes what we observe around us, and for
reasons which appear fundamental we do not know how to systematically determine
even any rough quantitative properties. I argue here that we should examine
large classes of string ground states, trying to determine whether features
such as low energy supersymmetry, the pattern of supersymmetry breaking, the
presence of axions, large dimensions, or others might be generic.


title: Supersymmetry, Axions and Cosmology

abstract:
  Various authors have noted that in particular models, the upper bound on the
axion decay constant may not hold. We point out that within supersymmetry, this
is a generic issue. For large decay constants, the cosmological problems
associated with the axion's scalar partner are far more severe than those of
the axion. We survey a variety of models, both for the axion multiplet and for
cosmology, and find that in many cases where the cosmological problems of the
saxion are solved, the usual upper bound on the axion is significantly relaxed.
We discuss, more generally, the cosmological issues raised by the pseudoscalar
members of moduli multiplets, and find that they are potentially quite severe.


title: Unification of Higgs and Gauge Fields in Five Dimensions

abstract:
  We construct realistic theories in which the Higgs fields arise from extra
dimensional components of higher dimensional gauge fields. In particular, we
present a minimal 5D SU(3)_C x SU(3)_W model and a unified 5D SU(6) model. In
both cases the theory is reduced to the minimal supersymmetric standard model
below the compactification scale, with the two Higgs doublets arising from the
5D gauge multiplet. Quarks and Leptons are introduced in the bulk, giving
Yukawa couplings without conflicting with higher dimensional gauge invariance.
Despite the fact that they arise from higher dimensional gauge interactions,
the sizes of these Yukawa couplings can be different from the 4D gauge
couplings due to wave-function profiles of the matter zero modes determined by
bulk mass parameters. All unwanted fields are made heavy by introducing
appropriate matter and superpotentials on branes, which are also the source of
intergenerational mixings in the low-energy Yukawa matrices. The theory can
accommodate a realistic structure for the Yukawa couplings as well as small
neutrino masses. Scenarios for supersymmetry breaking and the mu-term
generation are also discussed.


title: Two-loop O(as^2) MSSM corrections to the pole masses of heavy quarks

abstract:
  We present the results for two-loop MSSM corrections to the relation between
pole and running masses of heavy quarks up to the order O(as^2). The running
masses are defined in the DR scheme, usually used in multiloop calculations in
supersymmetric theories. The analysis of the value of these corrections in
different regions of the parameter space is provided.


title:
Radiative Corrections to Fixed Target Moller Scattering Including Hard
  Bremsstrahlung Effects

abstract:
  We present a calculation of the complete $O(\alpha)$ electroweak radiative
corrections to the Moller scattering process e^-e^- -> e^-e^-, including hard
bremsstrahlung contributions. We study the effects of these corrections on both
the total cross section and polarization asymmetry measured in low energy fixed
target experiments. Numerical results are presented for the experimental cuts
relevant for E-158, a fixed target e^-e^- experiment being performed at SLAC;
the effect of hard bremsstrahlung is to shift the measured polarization
asymmetry by approximately +4%. We briefly discuss the remaining theoretical
uncertainty in the prediction for the low energy Moller scattering polarization
asymmetry.


title: Neutrino masses from universal Fermion mixing

abstract:
  If three right-handed neutrinos are added to the Standard Model, then, for
the three known generations, there are six quarks and six leptons. It is then
natural to assume that the symmetry considerations that have been applied to
the quark matrices are also valid for the lepton mass matrices. Under this
assumption, the solar and atmospheric neutrino data can be used to determine
the individual neutrino masses. Using the \chi^2 fit, it is found that the mass
of the lightest neutrino is (2-5)\times10^{-3} eV, that of the next heavier
neutrino is (10-13)\times10^{-3} eV, while the mass of the heaviest neutrino is
(52-54)\times10^{-3} eV.


title: b-bbar final states in Higgs production via weak boson fusion at the LHC

abstract:
  We present a study of the Higgs production at the LHC via Weak Boson Fusion,
with the Higgs boson decaying into a b-quark pair. A detailed partonic LO
calculation of all the potential backgrounds is performed. We conclude that
this channel for Higgs production can be extracted from the backgrounds, and
present our estimates of the accuracy in the determination of the Hbb Yukawa
coupling.


title: Renormalization of self-consistent $\Phi$-derivable approximations

abstract:
  Within finite temperature field theory, we show that truncated
non-perturbative self-consistent Dyson resummation schemes can be renormalized
with local vacuum counterterms. For this the theory has to be renormalizable in
the usual sense and the self-consistent scheme must follow Baym's Phi-derivable
concept. Our BPHZ-renormalization scheme leads to renormalized self-consistent
equations of motion. At the same time the corresponding 2PI-generating
functional and the thermodynamic potential can be renormalized with the same
counterterms used for the equations of motion. This guarantees the standard
Phi-derivable properties like thermodynamic consistency and exact conservation
laws also for the renormalized approximation schemes. We give also a short
overview over symmetry properties of the various functions defined within the
2PI scheme for the case that the underlying classical field theory has a global
linearly realized symmetry.


title: Cold, warm, and composite (cool) cosmic string models

abstract:
  The dynamical behaviour of a cosmic string is strongly affected by any
reduction of the effective string tension $T$ below the constant value $T=m^2$
say that characterizes the simple, longitudinally Lorentz invariant, Goto Nambu
string model in terms of a fixed mass scale $m$ whose magnitude depends on that
of the Higgs field responsible for the existence of the string. Such a
reduction occurs in the standard "hot" cosmic string model in which the effect
of thermal perturbations of a simple Goto Nambu model is expressed by the
formula $T^2=m^2(m^2-2\pi\Theta^2/3)$, where $\Theta$ is the string
temperature. A qualitatively similar though analytically more complicated
tension reduction phenomenon occurs in "cold" conducting cosmic string models
where the role of the temperature is played by an effective chemical potential
$\mu$ that is constructed as the magnitude of the phase $\phi$ of a bosonic
condensate of the kind whose existence was first proposed by Witten. The
present article describes the construction and essential mechanical properties
of a category of "warm" cosmic string models that are intermediate between
these "hot" and "cold" extremes. These "warm" models are the string analogues
of the standard Landau model for a 2-constituent finite temperature superfluid,
and as such involve two independent currents interpretable as that of the
entropy on one hand and that of the bosonic condensate on the other. It is
surmised that the stationary (in particular ring) equilibrium states of such
"warm" cosmic strings may be of cosmological significance.


title:
Impact-Picture Phenomenology for $\pi^{\pm}p, K^{\pm}p$ and $pp, \bar p
  p$

abstract:
  We present an extension to $\pi^{\pm} p$ and $K^{\pm} p$ elastic scattering
at high energies of the impact-picture phenomenology we first proposed more
than twenty years ago, for $p p$ and $\bar p p$ elastic scattering. We show, in
particular, that the analytic form of the opacity function for the proton
obtained previously is compatible with the experimental results on $\pi p$ and
$K p$ elastic scattering at high energies. It is proposed that $\pi^{\pm}$ and
$K^{\pm}$ external beams be provided from CERN-LHC, so that their elastic
scattering from protons can be studied at higher energies. Our phenomenology
for $p p$ and $\bar p p$ elastic scattering is updated by including new data
and we give predictions for future experiments at BNL-RHIC and CERN-LHC.


title: Hadronic Spectral Function and Charm Meson Production

abstract:
  At the chiral restoration/deconfinement transition, most hadrons undergo a
Mott transition from being bound states in the confined phase to resonances in
the deconfined phase. We investigate the consequences of this qualitative
change in the hadron spectrum on final state interactions of charmonium in hot
and dense matter, and show that the Mott effect for D-mesons leads to a
critical enhancement of the J/Psi dissociation rate. Anomalous J/Psi
suppression in the NA50 experiment is discussed as well as the role of the Mott
effect for the heavy flavor kinetics in future experiments at the LHC. The
status of our calculations of hadron-hadron cross sections using the quark
interchange and chiral Lagrangian approaches is reviewed, and an Ansatz for a
unification of these schemes is given.


abstract:
  We review the basic field-theoretic and phenomenological features of the
recently introduced Minimal Nonminimal Supersymmetric Standard Model (MNSSM).
The introduced model is the simplest and most economic version among the
proposed nonminimal supersymmetric models, in which the so-called $\mu$-problem
can be successfully addressed. As opposed to the MSSM and the
frequently-discussed NMSSM, the MNSSM can naturally predict the existence of a
light charged Higgs boson with a mass smaller than 100 GeV. Such a possible
realization of the Higgs sector can be soon be tested at the upgraded Run II
phase of the Tevatron collider.


title: One more mechanism of electric charge non-conservation

abstract:
  If photon mass is not exactly zero, though arbitrary small, electric charge
would not be conserved in interaction of charged particles with black holes.
Manifestations of such mechanism of electric charge non-conservation are
discussed.


title: Lepton Flavour Violating Z Decays in the MSSM

abstract:
  The possibility to observe lepton flavour violating Z decays in the GigaZ
option of DESY's TESLA project consistently with present bounds from other
processes is analyzed in the context of the minimal supersymmetric standard
model. In particular, constraints on the slepton mass matrices from radiative
lepton decays are updated and taken into account. Their correlation to the
present measurement of the muon anomalous dipole moment is briefly discussed.


title:
LHC(CMS) SUSY discovery potential for nonuniversal gaugino and squark
  masses and the determination of the effective SUSY scale

abstract:
  We review the results on the investigation of the LHC(CMS) SUSY discovery
potential for the case of nonuniversal gaugino and squark masses.


title:
Precision and uncertainties in mass scale predictions in SUSY SO(10)
  with SU(2)_L x SU(2)_R x U(1)_{B-L} x SU(3)_C intermediate breaking

abstract:
  In a class of SUSY SO(10) with $SU(2)_L x SU(2)_R x U(1)_{B-L} x SU(3)_C$
$(g_{2L}\neq g_{2R})$ intermediate gauge symmetry, we observe that the
prediction on the unification mass $(M_U)$ is unaffected by
Planck-scale-induced gravitational and intermediate-scale-threshold effects,
although the intermediate scale $(M_I)$ itself is subject to such corrections.
In particular, without invoking the presence of additional lighter scalar
degrees of freedom but including plausible and reasonable threshold effects, we
find that interesting solutions for neutrino physics corresponding to
$M_I\simeq 10^{10}-10^{13}$ GeV and $M_U\simeq (5-6) x 10^{17}$ GeV are
permitted in the minimal models. Possibilities of low-mass right-handed gauge
bosons corresponding to $M_I\simeq 1-10$ TeV consistent with the CERN-LEP data
are pointed out in a number of models when threshold effects are included using
effective mass parameters.


title:
The Effective Lagrangian for the Seesaw Model of Neutrino Mass and
  Leptogenesis

abstract:
  The effective Lagrangian for the seesaw model is derived including effects
due to CP violation. Besides the usual dimension-5 operator responsible for
light neutrino masses, a dimension-6 operator is obtained. For three or less
heavy neutrino generations, the inclusion of both operators is necessary and
sufficient for all independent physical parameters of the high-energy seesaw
Lagrangian to appear in the low-energy effective theory, including the CP-odd
phases relevant for leptogenesis. The dimension-6 operator implies exotic
low-energy couplings for light neutrinos, providing a link between the
high-energy physics and low-energy observables.


title: Subleading power corrections in $B\to PP$ decays

abstract: This paper has been withdrawn by the author due to new results to be added.


title: The would-be majoron in R-parity-violating supersymmetry

abstract:
  In lepton-number-violating supersymmetric models, there is no natural choice
of basis to distinguish the down-type Higgs and lepton superfields. We employ
basis-independent techniques to identify the massless majoron and associated
light scalar in the case of spontaneously-broken lepton number (L). When
explicit L-violation is added, these two scalars can acquire masses of order
the electroweak scale and can be identified as massive sneutrinos.


title: Leptogenesis in a prompt decay scenario

abstract:
  Leptogenesis is studied within the seesaw neutrino mass model in a regime
where all sterile neutrinos have prompt rather than delayed decays. It is shown
that during neutrino thermal production lepton asymmetries are generated in
both active lepton and sterile neutrino sectors. The large B-L asymmetry is
slowly pumped into the chemically decoupled right-handed quarks and leptons and
baryon number sector which later protect B-L from fast L violating processes.
The dependence of the final baryon asymmetry on couplings and masses is totally
different from the decay scenario. B does not vanish in the limit of degenerate
light neutrinos and the observed asymmetry is naturally obtained for a sum of
square masses between the atmospheric neutrino mass gap and 0.2 eV^2.


title: Hadronic B Decays to Charmed Baryons

abstract:
  We study exclusive B decays to final states containing a charmed baryon
within the pole model framework. Since the strong coupling for $\Lambda_b\bar B
N$ is larger than that for $\Sigma_b \bar BN$, the two-body charmful decay
$B^-\to\Sigma_c^0\bar p$ has a rate larger than $\bar B^0\to\Lambda_c^+\bar p$
as the former proceeds via the $\Lambda_b$ pole while the latter via the
$\Sigma_b$ pole. By the same token, the three-body decay $\bar
B^0\to\Sigma_c^{++}\bar p\pi^-$ receives less baryon-pole contribution than
$B^-\to\Lambda_c^+\bar p\pi^-$. However, because the important charmed-meson
pole diagrams contribute constructively to the former and destructively to the
latter, $\Sigma_c^{++}\bar p\pi^-$ has a rate slightly larger than
$\Lambda_c^+\bar p\pi^-$. It is found that one quarter of the $B^-\to
\Lambda_c^+\bar p\pi^-$ rate comes from the resonant contributions. We discuss
the decays $\bar B^0\to\Sigma_c^0\bar p\pi^+$ and $B^-\to\Sigma_c^0\bar p\pi^0$
and stress that they are not color suppressed even though they can only proceed
via an internal W emission.


title:
Hierarchical Neutrino Masses and Large Mixing Angles from the Fritzsch
  Texture of Lepton Mass Matrices

abstract:
  We show that the Fritzsch texture of lepton mass matrices can naturally lead
to the bi-large flavor mixing pattern, if three neutrinos have a normal but
weak mass hierarchy (typically, $m_1 : m_2 : m_3 \sim 1 : 3 :10$). The
effective mass of the tritium beta decay and that of the neutrinoless double
beta decay are too small to be observable in this ansatz, but CP violation at
the percent level is allowed and could be measured in long-baseline neutrino
oscillations.


title: On baryon-antibaryon coupling to two photons

abstract:
  We discuss recent claims that $p\bar{p} \to \gamma \gamma$ may be described
by a generalized parton picture. We propose that quark-hadron duality provides
a justification for the effective dominance of the "handbag" diagram assumed in
recent literature, and that handbag diagrams may dominate phenomena in
kinematic regions far more extensive than that might be expected from pQCD
alone.


title: Electromagnetic Properties of the Delta in the Large N and Chiral Limits

abstract:
  Relations between nucleon, $\Delta$ and nucleon-$\Delta$ electromagnetic
properties associated with chiral physics which have been derived in a pure
large-$N_c$ limit are greatly modified in a combined large $N_c$ and chiral
limits; the large $N_c$ relations are valid for $(M_\Delta-M_N)/m_\pi <<1$. The
E2/M1 ratio for the nucleon-$\Delta$ transition is shown to scale as
$\epsilon^{-1}$ (with $\epsilon\sim 1/N_c$, $\epsilon \sim m_\pi/\Lambda $ with
$\Lambda$ a typical hadronic scale) in the combined large $N_c$ and chiral
expansions as opposed to $N_c^{-2}$ in the pure large $N_c$ expansion.


title: Two photon width of heavy pseudoscalar mesons

abstract:
  We discuss the partial width of the pseudoscalar charmonium state eta_c and
bottomonium state eta_b into two photons. Predictions from potential models are
examined and compared with experimental values for the eta_c case. Through the
NRQCD factorisation procedure results for eta_c are also compared with those
from J/psi data, and results for eta_b to the Upsilon decay data.


title: Ultra-high energy cosmic rays from super-heavy X particle decay

abstract:
  In this talk, I present the last and more precise results obtained in the
computation of the final spectra of stable particles issued from the decay of
super-heavy X particles (M_X ~ 10^21 to 10^25 eV). Such very energetic decay
products, carrying a fraction of the mass of the X particle, are believed to be
a plausible explanation for the observed ultra-high energy cosmic rays (UHECR).
Combining these results with X-particle models and with a code describing the
propagation effects for UHECRs through the interstellar medium, it becomes
possible to make some predictions on the fluxes expected on Earth, hopefully
detectable in the next generation of experiments.


title: A Note on Asymptotic Freedom at High Temperatures

abstract:
  This short note considers, within the external field approach outlined in
hep-ph/0202026, the role of the lowest lying gluon Landau mode in QCD in the
high temperature limit. Its influence on a temperature- and field-dependent
running coupling constant is examined. The thermal imaginary part of the mode
is temperature-independent in our approach and exactly cancels the well-known
zero temperature imaginary part, thus rendering the Savvidy vacuum stable.
Combining the real part of the mode with the contributions from the higher
lying Landau modes and the vacuum contribution, a field-independent coupling
alpha_s(T) is obtained. It can be interpreted as the ordinary zero temperature
running coupling constant with average thermal momenta <k> \approx 2pi T for
gluons and <k> \approx pi T for quarks.


title:
$\eta \to \pi^0 \gamma \gamma$ decay within unitarized chiral
  perturbation theory

abstract:
  We improve the calculations of the $\eta \to \pi^0 \gamma \gamma$ decay
within the context of meson chiral lagrangians. We use a chiral unitary
approach for the meson-meson interaction, thus generating the $a_0(980)$
resonance and fixing the longstanding sign ambiguity on its contribution. This
also allows us to calculate the loops with one vector meson exchange, thus
removing a former source of uncertainty. In addition we ensure the consistency
of the approach with other processes. First, by using vector meson dominance
couplings normalized to agree with radiative vector meson decays. And, second,
by checking the consistency of the calculations with the related $\gamma \gamma
\to \pi^0 \eta$ reaction. We find an $\eta \to \pi^0 \gamma \gamma$ decay width
of $0.47\pm 0.10$ eV, in clear disagreement with published data but in
remarkable agreement with the most recent measurement.


title: Electroweak Sudakov corrections in the MSSM

abstract:
  For superpartner masses not much heavier than the weak scale $M=M_{\rm W}$,
large logarithmic corrections of the Sudakov type arise at TeV energies. In
this paper we summarize recent results of supersymmetric (susy) electroweak
radiative corrections for sfermion and charged Higgs production at $e^+e^-$
colliders in the MSSM. The results are given to subleading logarithmic (SL)
accuracy to all orders in perturbation theory in the ``light'' susy-mass
scenario. Prospects for the determination of $\tan \beta \geq 10$ are discussed
which is independent of soft susy-breaking terms to SL accuracy.