title:
Constraining the neutrino magnetic moment with anti-neutrinos from the
  Sun

abstract:
  We discuss the impact of different solar neutrino data on the
spin-flavor-precession (SFP) mechanism of neutrino conversion. We find that,
although detailed solar rates and spectra allow the SFP solution as a
sub-leading effect, the recent KamLAND constraint on the solar antineutrino
flux places stronger constraints to this mechanism. Moreover, we show that for
the case of random magnetic fields inside the Sun, one obtains a more stringent
constraint on the neutrino magnetic moment down to the level of \mu_\nu \lsim
few \times 10^{-12}\mu_B, similar to bounds obtained from star cooling.


title: A rigorous bound on quark distributions in the nucleon

abstract:
  I deduce an inequality between the helicity and the transversity distribution
of a quark in a nucleon, at small energy scales. Then I establish, thanks to
the positivity constraint, a rigorous bound on longitudinally polarized valence
quark densities, which finds nontrivial applications to d-quarks. This, in
turn, implies a bound for the distributions of the longitudinally polarized
sea, which is probably not SU(3)-symmetric. Some model predictions and
parametrizations of quark distributions are examined in the light of these
results.


title:
Helicity-dependent generalized parton distributions in constituent quark
  models

abstract:
  Helicity-dependent generalized parton distributions of the nucleon are
derived from the overlap representation of generalized parton distributions
using light-cone wave functions obtained in constituent quark models. Results
from two different quark models are used also to study the angular momentum sum
rule and the spin asymmetry in polarized electron scattering.


title: Vector Meson Photoproduction from the BFKL Equation II: Phenomenology

abstract:
  Diffractive vector meson photoproduction accompanied by proton dissociation
is studied for large momentum transfer. The process is described by the
non-forward BFKL equation which we use to compare to data collected at the HERA
collider.


title:
WG2 Conveners' Report: Vtd and Vts, B-Bbar mixing, radiative penguin and
  rare (semi)leptonic decays

abstract:
  We introduce the Working Group 2 proceedings contributions from the 2nd
workshop on the CKM Unitarity Triangle and note their connection to the
proceedings of the first workshop. The topic of WG2 was the determination of
the CKM matrix elements Vtd and Vts from B-Bbar mixing, radiative penguin B to
X{s/d} gamma decays and rare (semi)leptonic decays such as B to Xs l+ l-.


title:
Integral and derivative dispersion relations, analysis of the forward
  scattering data

abstract:
  Integral and derivative dispersion relations (DR) are considered for the
forward scattering $pp$ and $\bar pp$ amplitudes. A new representation for the
derivative DR, valid not only at high energy, is obtained. The data on the
total cross sections for $pp (\bar pp)$ interaction as well as the data on the
parameter $\rho $ are analyzed within the various forms of the DR and
high-energy Regge models. It is shown that three models for the Pomeron, Simple
pole Pomeron, Tripole Pomeron and Dipole Pomeron (the both with the intercept
equal unit) lead to practically equivalent description of the data at
$\sqrt{s}>$5 GeV. It is also shown that the correctly calculated low-energy
part of the dispersion integral (from the two-proton threshold up to
$\sqrt{s}=$5 GeV) allows to reproduce well the $\rho $ data at low energies
without additional free parameters.


title: System-size dependence

abstract:
  The final state in The final state in heavy-ion collisions has a higher
degree of strangeness saturation than the one produced in collisions between
elementary particles like p-p or p-$\bar{p}$. A systematic analysis of this
phenomenon is made for C-C, Si-Si and Pb-Pb collisions at the CERN SPS collider
and for $Au-Au$ collisions at RHIC and at AGS energies. Strangeness saturation
is shown to increase smoothly with the number of participants at AGS, CERN and
RHIC energies.


title:
Radiation and self-polarization of neutral fermions in quasi-classical
  description

abstract:
  A Lorentz invariant formalism for quasi-classical description of
electromagnetic radiation from a neutral spin 1/2 particle with an anomalous
magnetic moment moving in an external electromagnetic field is developed. In
the high symmetry fields, for which analytical solutions to the
Bargmann--Michel--Telegdi equation are known, the so called self-polarization
axes, i. e. directions of preferred polarization of particles in the radiation
process, are found. Expressions for the radiative transition probability and
spectral-angular distribution of the radiation emitted by a polarized particle
are obtained in the fields under consideration.


title: Thermal leptogenesis in a model with mass varying neutrinos

abstract:
  In this paper we consider the possibility of neutrino mass varying during the
evolution of the Universe and study its implications on leptogenesis.
Specifically, we take the minimal seesaw model of neutrino masses and introduce
a coupling between the right-handed neutrinos and the dark energy scalar field,
the Quintessence. In our model, the right-handed neutrino masses change as the
Quintessence scalar evolves. We then examine in detail the parameter space of
this model allowed by the observed baryon number asymmetry. Our results show
that it is possible to lower the reheating temperature in this scenario in
comparison with the case that the neutrino masses are unchanged, which helps
solve the gravitino problem. Furthermore, a degenerate neutrino mass patten
with $m_i$ larger than the upper limit given in the minimal leptogenesis
scenario is permitted.


title: Extending the study of the Higgs sector at the LHC by proton tagging

abstract:
  We show that forward proton tagging may significantly enlarge the potential
of studying the Higgs sector at the LHC. We concentrate on Higgs production via
central exclusive diffractive processes (CEDP). Particular attention is paid to
regions in the MSSM parameter space where the partial width of the Higgs boson
decay into two gluons much exceeds the SM case; here the CEDP are found to have
special advantages.


title: Exclusive Double Diffractive Higgs Boson Production at LHC

abstract:
  Exclusive double diffractive (EDD) Higgs boson production is analyzed in the
framework of the Regge-eikonal approach. Total and differential cross-sections
for the process $p+p\to p+H+p$ are calculated. Experimental possibilities to
find Higgs boson at LHC are discussed.


title:
Spontaneous rotational symmetry breaking and roton like excitations in
  gauged sigma-model at finite density

abstract:
  The linear $\sigma$-model with a chemical potential for hypercharge is a toy
model for the description of the dynamics of the kaon condensate in high
density QCD. We analyze the dynamics of the gauged version of this model. It is
shown that spontaneous breakdown of $SU(2) \times U(1)_{Y}$ symmetry, caused by
the chemical potential, is always accompanied by spontaneous breakdown of both
rotational symmetry and electromagnetic $U(1)_{em}$. The spectrum of
excitations in this model is rich and, because of rotational symmetry
breakdown, anisotropic. It is shown that there exist excitation branches that
behave as phonon like quasiparticles for small momenta and as roton like ones
for large momenta. This suggests that this model can be relevant for
anisotropic superfluid systems.


title: Oklo Constraint on the Time-Variability of the Fine-Structure Constant

abstract:
  The Oklo phenomenon, natural fission reactors which had taken place in Gabon
about 2 billion years ago, provides one of the most stringent constraints on
the possible time-variability of the fine-structure constant $\alpha$. We first
review briefly what it is and how reliable it is in constraining $\alpha$. We
then compare the result with a more recent result on the nonzero change of
$\alpha$ obtained from the observation of the QSO absorption lines. We suggest
a possible way to make these results consistent with each other in terms of the
behavior of a scalar field which is expected to be responsible for the
acceleration of the universe.


title: Form factor of \pi^0\gamma^*\gamma^* and contribution to muon g-2

abstract:
  The transition form factor of $\pi^0\gamma^*\gamma^* is found. The slope is
predicted. The contribution to muon g-2 is calculated.


title: The Quark Gluon Plasma and The Color Glass Condensate: 4 Lectures

abstract:
  The purpose of these lectures is to provide an introduction to the physics
issues which are being studied in the RHIC heavy ion program. These center
around the production of new states of matter. The Quark Gluon Plasma is
thermal matter which once existed in the big bang which may be made at RHIC.
The Color Glass Condensate is a universal form of matter which controls the
high energy limit of strong interactions. Both such forms of matter might be
produced and probed at RHIC.


title: Radiatively induced leptogenesis in a minimal seesaw model

abstract:
  We study the possibility that the baryon asymmetry of the universe is
generated in a minimal seesaw scenario where two right-handed Majorana
neutrinos with degenerate masses are added to the standard model particle
content. In the usual framework of thermal leptogenesis, a nonzero $CP$
asymmetry can be obtained through the mass splitting induced by the running of
the heavy Majorana neutrino masses from their degeneracy scale down to the
seesaw scale. Although, in the light of the present neutrino oscillation data,
the produced baryon asymmetry turns out to be smaller than the experimental
value, the present mechanism could be viable in simple extensions of the
standard model.


title: Light pseudoscalar mesons in a nonlocal SU(3) chiral quark model

abstract:
  We study the properties of the light pseudoscalar mesons in a three flavor
chiral quark model with nonlocal separable interactions. We concentrate on the
evaluation of meson masses and decay constants, considering both the cases of
Gaussian and Lorentzian nonlocal regulators. The results are found to be in
quite good agreement with the empirical values, in particular in the case of
the ratio f_K/f_pi and the anomalous decay pi^0 --> gamma gamma. In addition,
the model leads to a reasonable description of the observed phenomenology in
the eta-eta' sector, even though it implies the existence of two significantly
different state mixing angles.


title: Rotational Spectra of the Exotic and Non-exotic Baryons

abstract:
  In the present paper, the rotational states of the baryons, dibaryons and
baryon octets are shown. A comparison of the S = +1 theta baryons is made to
the spectrum of the narrow width dibaryons. From this comparison, the
rotational spectra of the exotic theta baryons are proposed. We analyze the
importance of the 70 MeV quantum proposed by Mac Gregor and its relationship in
the location of exotic baryons belonging to the antidecuplet. Antidecuplet mass
separations are suggested on the order of the pion mass or 120 - 150 MeV from
symmetry to the spectrums of the baryon decuplet and charmed baryons. A mass
separation is possible on the order of the muon mass or 108 MeV as recently
suggested by Diakonov and Petrov. However, the mass separation of 108 MeV
introduces an asymmetry with respect to the mass separations as found in the
baryon decuplet.


title:
One-loop Radiative Corrections to the rho Parameter in the Littlest
  Higgs Model

abstract:
  We perform a one-loop analysis of the rho parameter in the Littlest Higgs
model, including the logarithmically enhanced contributions from both fermion
and scalar loops. We find the one-loop contributions are comparable to the tree
level corrections in some regions of parameter space. The fermion loop
contribution dominates in the low cutoff scale f region. On the other hand, the
scalar loop contribution dominates in the high cutoff scale f region and it
grows with the cutoff scale f. This in turn implies an upper bound on the
cutoff scale. A low cutoff scale is allowed for a non-zero triplet VEV.
Constraints on various other parameters in the model are also discussed. The
role of triplet scalars in constructing a consistent renormalization scheme is
emphasized.


title: Estimates of Light Quark Masses from Lattice QCD and QCD Sum rules

abstract:
  This talk reviews the progress made in the determination of the light quark
masses using lattice QCD and QCD sum rules. Based on preliminary calculations
with three flavors of dynamical quarks, the lattice estimate is $m_s = 75(15)$
MeV, a tantalizingly low value. On the other hand the leading estimates from
scale and pseudo-scalar sum rules are $99(16)$ and $100(12)$ MeV respectively.
The $\tau$-decay sum rule estimates depend very sensitively on the value of
$|V_{us}|$. The central values from different analyses lie in the range 115-120
MeV if unitarity of CKM matrix is imposed, and in the range 100-105 MeV if the
Particle Data Group values for $|V_{us}|$ are used. I also give my reasons for
why the lattice result is not yet in conflict with rigorous lower bounds from
sum rule analyses.


title: An Overview of Neutrino Masses and Mixing in SO(10) Models

abstract:
  We review in this talk various SUSY SO(10) models. Specifically, we discuss
how small neutrino masses are generated in and generic predictions of different
SO(10) models. A comparison of the predictions of these models for
sin^{2}(theta_{13}) is given.


title: Status of Exclusive Baryonic B Decays

abstract:
  The status of exclusive two-body and three-body baryonic B decays is
reviewed. The threshold peaking effect in baryon pair invariant mass is
stressed and explained. Weak radiative baryonic B decays mediated by the
electromagnetic penguin process are discussed.


title: New Physics and CP Violation in Hyperon Nonleptonic Decays

abstract:
  The sum of the CP-violating asymmetries A(Lambda_-^0) and A(Xi_-^-) in
hyperon nonleptonic decays is presently being measured by the E871 experiment.
We evaluate contributions to the asymmetries induced by chromomagnetic-penguin
operators, whose coefficients can be enhanced in certain models of new physics.
Incorporating recent information on the strong phases in Xi->Lambda pi decay,
we show that new-physics contributions to the two asymmetries can be
comparable. We explore how the upcoming results of E871 may constrain the
coefficients of the operators. We find that its preliminary measurement is
already better than the epsilon parameter of K-Kbar mixing in bounding the
parity-conserving contributions.


title: Analysis of the Neutralino System in Two--Body Decays of Neutralinos

abstract:
  In the minimal supersymmetric standard model (MSSM), the neutralinos, the
spin--1/2 Majorana superpartners of the neutral gauge and Higgs bosons, are
expected to be among the light supersymmetric particles that can be produced
copiously at future high--energy colliders. We analyze two--body neutralino
decays into a neutralino plus a $Z$ boson or a lightest neutral Higgs boson
$h$, allowing the relevant parameters to have complex phases. We show that the
two--body tree--level decays of neutralinos are kinematically allowed in a
large region of the MSSM parameter space and they can provide us with a
powerful probe of the Majorana nature and CP properties of the neutralinos
through the $Z$--boson polarization measured from $Z$--boson leptonic decays.


title: Little Higgs Models and Precision Electroweak Data

abstract:
  We study the low energy limit of Little Higgs models. The method consists in
eliminating the heavy fields using their classical equations of motion in the
infinite mass limit. After the elimination of the heavy degrees of freedom we
can directly read off deviations from the precision electroweak data. We also
examine the effects on the low energy precision experiments.


title:
Hard exclusive reactions and the two-gluon components of eta and eta'
  mesons

abstract:
  The formalism for treating the leading-twist contributions of the two-gluon
Fock components occurring in hard exclusive processes that involve eta and eta'
mesons is reviewed. The calculation of the eta, eta'--photon transition form
factor in next-to-leading order in alpha_s, as well as, the analysis of the g*
g* eta' vertex and the electro- and photoproduction of eta, eta' mesons are
presented. Applications of this formalism to other relevant quantities such as
glueballs are also discussed.


title: Lattice QCD and Heavy Quark Physics

abstract:
  Lattice QCD results relevant to heavy quark physics are reviewed. In
particular new results will be shown that, for the first time, include
dynamical quarks in the QCD vacuum which are close enough to being realistic to
allow accurate extrapolation to the physical point. Agreement with experiment
is found for a wide range of spectral quantities and the implications of this
for hadronic matrix elements needed for the extraction of CKM elements from B
factory experiments is discussed.


title: Lattice QCD meets experiment in hadron physics

abstract:
  We review recent results in lattice QCD from numerical simulations that allow
for a much more realistic QCD vacuum than has been possible before. Comparison
with experiment for a variety of hadronic quantities gives agreement to within
statistical and systematic errors of 3%. We discuss the implications of this
for future calculations in lattice QCD, particularly those which will provide
input for B factory experiments.


title: CKM angles from non-leptonic B decays using SU(3) flavour symmetry

abstract:
  We discuss the determination of the CKM angles gamma and alpha using recent
data from non-leptonic B decays together with flavour symmetries. Penguin
effects are controlled by means of the CP-averaged branching ratio B_d \to
\pi^\pm K^\mp. The information from A_{CP}(B_d \to J/\Psi K_S) (two solutions
for phi_d), Rb and gamma allow us to determine beta, even in presence of New
Physics not affecting Delta B=1 amplitudes. In this context we address the
question of to what extent there is still space for New Physics.


title: On the Complex Wilson Coefficients of New Physics Scenarios

abstract:
  We draw attention on the procedure, where Standard Model predictions and
experimental results are compared and certain new physics scenarios are ruled
out, that requires great attention, since there is still a room for new
physics, especially when contributions of extended models bear complex phases.
We observe that this is true even when SM and experiment yield the same results
with zero uncertainties.


title: Summary and Overview of Working Group VI: Vus and Vud

abstract:
  We briefly review the current status of the determination of |V_{us}| and
|V_{ud}|, with particular attention to the latest experimental and theoretical
developments on |V_{us}| since the first CKM Workshop.


title:
A non-perturbative computation of the B-meson decay constant and the
  b-quark mass in HQET

abstract:
  A lattice computation of the B-meson decay constant and the mass of the
b-quark to leading order in the heavy quark effective theory is presented. The
involved renormalization problems are solved non-perturbatively, and the
continuum limit is taken. In the quenched approximation the results reported
here already offer an interesting numerical precision, which will be further
improved in the near future.


title: Algebraic Relations Between Harmonic Sums and Associated Quantities

abstract:
  We derive the algebraic relations of alternating and non-alternating finite
harmonic sums up to the sums of depth~6. All relations for the sums up to
weight~6 are given in explicit form. These relations depend on the structure of
the index sets of the harmonic sums only, but not on their value. They are
therefore valid for all other mathematical objects which obey the same
multiplication relation or can be obtained as a special case thereof, as the
harmonic polylogarithms. We verify that the number of independent elements for
a given index set can be determined by counting the Lyndon words which are
associated to this set. The algebraic relations between the finite harmonic
sums can be used to reduce the high complexity of the expressions for the
Mellin moments of the Wilson coefficients and splitting functions significantly
for massless field theories as QED and QCD up to three loop and higher orders
in the coupling constant and are also of importance for processes depending on
more scales. The ratio of the number of independent sums thus obtained to the
number of all sums for a given index set is found to be $\leq 1/d$ with $d$ the
depth of the sum independently of the weight. The corresponding counting
relations are given in analytic form for all classes of harmonic sums to
arbitrary depth and are tabulated up to depth $d=10$.

categories: hep-ph hep-lat hep-th math.CO math.QA math.RA


title: New bounds on the mass of a b' quark

abstract:
  In this work we present limits on a sequential down-type quark, b', based on
the most recent DELPHI data. Using all available experimental data for m_b' >
96 GeV we conclude that a sequential four generations model is far from being
experimentally excluded.


title: Hard probes in heavy ion collisions at the LHC: heavy flavour physics

abstract:
  We present the results from the heavy quarks and quarkonia working group.
This report gives benchmark heavy quark and quarkonium cross sections for $pp$
and $pA$ collisions at the LHC against which the $AA$ rates can be compared in
the study of the quark-gluon plasma. We also provide an assessment of the
theoretical uncertainties in these benchmarks. We then discuss some of the cold
matter effects on quarkonia production, including nuclear absorption,
scattering by produced hadrons, and energy loss in the medium. Hot matter
effects that could reduce the observed quarkonium rates such as color screening
and thermal activation are then discussed. Possible quarkonium enhancement
through coalescence of uncorrelated heavy quarks and antiquarks is also
described. Finally, we discuss the capabilities of the LHC detectors to measure
heavy quarks and quarkonia as well as the Monte Carlo generators used in the
data analysis.


title: Dense Gluon Matter in Nuclear Collisions

abstract:
  Theoretical and phenomenological aspects of high energy heavy ion collisions
are reviewed. Main emphasis is on ideas related to Color Glass Condensate (CGC)
physics.


title: Renormalons: technical introduction

abstract:
  The large-beta_0 limit of QCD is discussed, with the emphasize on simple
technical methods of calculating various quantities at the order 1/\beta_0.
Many examples, mainly from heavy quark physics, are considered. Some QCD
results based on renormalization group (and not restricted to the large-\beta_0
limit) are also discussed.


title: Double heavy baryons and dimesons

abstract:
  We critically examine the question whether the cc\bar{q}\bar{q} dimeson is
bound or not.


title:
Numerical evaluation of some master integrals for the 2-loop general
  massive self-mass from differential equations

abstract:
  The 4-th order Runge-Kutta method in the complex plane is proposed for
numerically advancing the solutions of a system of first order differential
equations in one external invariant satisfied by the master integrals related
to a Feynman graph. Some results obtained for the 2-loop self-mass MI are
reviewed. The method offers a reliable and robust approach to the direct and
precise numerical evaluation of master integrals.


title: Looking for strangeness with neutrino-nucleon scattering

abstract:
  The possibility to determine the axial strange form factor of the nucleon
from elastic neutrino-nucleon scattering experiments is studied. The existing
experimental information is shortly mentioned and several observables which
could be measured in the near future at new neutrino facilities are discussed.


title: Theta^+ baryon production in KN and NN reactions

abstract:
  We study $\Theta^+(1540)$ productions in kaon-nucleon ($KN$) and
nucleon-nucleon ($NN$) interactions by assuming that the $\Theta^+$ is an
isosinglet with $J^P = \frac12^+$. Possible $t$-channel diagrams with $K^*$
exchange are considered in both reactions as well as $K$ exchange in $NN$
reaction. The cross section for $np \to \Lambda^0 \Theta^+$, which has not been
considered in previous calculations, is found to be about a factor of 5 larger
than that for $np \to \Sigma^0 \Theta^+$ due to the large coupling of
$KN\Lambda$ interaction. The cross sections are obtained by setting
$g_{KN\Theta}^{}=1$ and varying the ratio of
$g_{K^*N\Theta}^{}/g_{KN\Theta}^{}$ so that future experimental data can be
used to estimate these couplings. We also find that the isospin relations hold
for these reactions.


title:
Avoiding superluminal propagation of higher spin waves via projectors
  onto W^2 invariant subspaces

abstract:
  We propose to describe higher spins as invariant subspaces of the Casimir
operators of the Poincar\'{e} Group, P^{2}, and the squared Pauli-Lubanski
operator, W^{2}, in a properly chosen representation, \psi(p) (in momentum
space), of the Homogeneous Lorentz Group. The resulting equation of motion for
any field with s\neq0 is then just a specific combination of the respective
covariant projectors. We couple minimally electromagnetism to this equation and
show that the corresponding wave fronts of the classical solutions propagate
causally. Furthermore, for (s,0)+(0,s) representations, the formalism predicts
the correct gyromagnetic factor, g_{s}=1/s. The advocated method allows to
describe any higher spin without auxiliary conditions and by one covariant
matrix equation alone. This master equation is only quadratic in the momenta
and its dimensionality is that of \psi(p). We prove that the suggested master
equation avoids the Velo-Zwanziger problem of superluminal propagation of
higher spin waves and points toward a consistent description of higher spin
quantum fields.


title: FCNC production of same sign Top quark pairs at the LHC

abstract:
  We study the possibility of same sign top quark pair production at the LHC
(and the VLHC) as a direct probe of FCNC processes. Besides the SM neutral Z
boson, two other neutral bosons are considered, a top-Higgs type scalar and a
Z' boson that appear in Topcolor assisted Technicolor models. We find that the
FCNC couplings tqV (q=u,c ; V=H,Z,Z') may produce an interesting signal of same
sign top quark pairs that could be observed at the LHC (VLHC).


title: Light-Front Quantization and QCD Phenomena

abstract:
  The light-front quantization of QCD provides an alternative to lattice gauge
theory for computing the mass spectrum, scattering amplitudes, and other
physical properties of hadrons directly in Minkowski space. Nonperturbative
light-front methods for solving gauge theory and obtaining light-front
wavefunctions, such as discretized light-front quantization, the transverse
lattice, and light-front resolvents are reviewed. The resulting light-front
wavefunctions give a frame-independent interpolation between hadrons and their
quark and gluon degrees of freedom, including an exact representation of
spacelike form factors, transition form factors such as $B \to \ell \bar \nu
\pi,$ and generalized parton distributions. In the case of hard inclusive
reactions, the effects of final-state interactions must be included in order to
interpret leading-twist diffractive contributions, nuclear shadowing, and
single-spin asymmetries. I also discuss how the AdS/CFT correspondence between
string theory and conformal gauge theory can be used to constrain the form and
power-law fall-off of the light-front wavefunctions. In the case of electroweak
theory, light-front quantization leads to a unitary and renormalizable theory
of massive gauge particles, automatically incorporating the Lorentz and 't
Hooft conditions as well as the Goldstone boson equivalence theorem.
Spontaneous symmetry breaking is represented by the appearance of zero modes of
the Higgs field, leaving the light-front vacuum equal to the perturbative
vacuum.


title: $SU(3)_F$ Meson Mass Formula from Random Phase Approximation

abstract:
  We present a $SU(3)_F$ meson mass formula from random phase approximation
(RPA). Both the mesons of ground-state pseudoscalar octet and the ground-state
vector octet are described quite well in this mass formula. We also estimate
the current and constituent quark masses from the na\"{\i}ve quark model with
the PCAC relation.


title: Infrared-Finite Amplitudes for Massless Gauge Theories

abstract:
  We present a method to construct infrared-finite amplitudes for gauge
theories with massless fermions. Rather than computing $S$-matrix elements
between usual states of the Fock space we construct order-by-order in
perturbation theory dressed states that incorporate all long-range
interactions. The $S$-matrix elements between these states are shown to be free
from soft and collinear singularities. As an explicit example we consider the
process $e^+ e^-\to 2$ jets at next-to-leading order in the strong coupling. We
verify by explicit calculation that the amplitudes are infrared finite and
recover the well-known result for the total cross section $e^+ e^-\to$ hadrons.


title: Excited States of Rotating Relativistic String with Massive Ends

abstract:
  For the relativistic string with massive ends arbitrary small disturbances of
the uniform rotation of the rectilinear string are investigated. There are two
classes of these oscillations with different spectra of frequencies. They are
stationary waves oscillating in the rotational plane and in the orthogonal
direction. These states are presented in the form of Fourier series that helps
to quantize string excitations in the linear vicinity of the classical
rotation. These string oscillations may be applied to describing daughter Regge
trajectories in the framework of the considered model


title:
Intrinsically nonperturbative QCD I. A pure dynamical theory of gluon
  confinement

abstract:
  We establish exactly and uniquely the infrared structure of the full gluon
propagator in QCD, not solving explicitly the corresponding dynamical equation
of motion. By construction, this structure is an infinite sum over all possible
severe (i.e., more singular than $1/q^2$) infrared singularities. It reflects
the zero momentum modes enhancement effect in the true QCD vacuum. Its
existence exhibits a characteristic mass (the so-called mass gap), which is
responsible for the scale of nonperturbative dynamics in the QCD ground state.
The theory of distributions, complemented by the dimensional regularization
method, allows one to put severe infrared singularities under firm mathematical
control. By an infrared renormalization of a mass gap only, the infrared
structure of the full gluon propagator is exactly reduced to the simplest
severe infrared singularity, the famous $(q^2)^{-2}$. So, the smooth in the
infrared limit the full gluon propagator is to be ruled out. Collective motion
of all the purely transverse $virtual$ gluon field configurations with
low-frequency components/large scale amplitudes is solely responsible for the
color confinement phenomenon within our approach. At the microscopic, dynamical
level these field configurations are saturated by the nonlinear fundamental
four-gluon interaction. It just makes the full gluon propagator inevitably so
singular in the infrared. The amplitudes of all the purely transversre severely
singular $actual$ gluon field configurations are totally suppressed, leading
thus to the confinement of gluons. We formulate exactly the gluon confinement
criterion in a manifestly gauge-invariant way, taking into account the
distribution nature of severe infrared singularities.


title: Inclusive Photoproduction of D* Mesons with Massive Charm Quarks

abstract:
  We have calculated the next-to-leading order cross sections for the inclusive
production of D* mesons in gamma-p collisions at HERA in two approaches using
massive or massless charm quarks. The usual massive theory for the direct cross
section with charm quarks only in the final state was transformed into a
massive theory with MS-bar subtraction by subtracting the mass divergent and
additional finite terms calculated earlier in connection with the process
gamma+gamma -> D*+X. This theory approaches the massless theory with increasing
transverse momentum. The difference between the massive and the massless
approach with MS-bar subtraction is studied in detail in those kinematic
regions relevant for comparison with experimental data. With these results and
including the resolved cross section which is dominated by the part originating
from the charm in the photon, we compute the fully inclusive D* cross section
and compare it with preliminary data from the ZEUS collaboration at HERA. We
find on average good agreement.


title:
Description of the CERN SPS data on the Landau-Pomeranchuk-Migdal effect
  for photon bremsstrahlung in quantum regime

abstract:
  We analyze within the light-cone path integral approach [4] the recent CERN
SPS data [19] on the Landau-Pomeranchuk-Migdal effect for photon bremsstrahlung
in quantum regime from 149, 207, and 287 GeV electrons. Calculations have been
carried out treating accurately the Coulomb effects and including the inelastic
processes. Comparison with experiment is performed accounting for multi-photon
emission. Our results are in good agreement with the data.


title: Neutrino Charm Production and Implications for PDF's

abstract:
  We have performed the first comprehensive global QCD analysis including the
CCFR and NuTeV di-muon data; this data provides strong constraints on the
strange quark PDF.


title: Calculation of Feynman integrals by difference equations

abstract:
  In this paper we describe a method of calculation of master integrals based
on the solution of systems of difference equations in one variable. Various
explicit examples are given, as well as the generalization to arbitrary
diagrams.


title:
$H^+ W^- Z$ contribution to the static quantities of the W boson in the
  context of Higgs-triplet theories

abstract:
  We calculate the one--loop contribution from the $H^+ W^- Z$ coupling to the
static electromagnetic properties of the W boson. Although this coupling is
absent at the tree--level in all Higgs--doublet models, it can be induced at
this order in models including Higgs--triplet representations. It is found that
the $H^+ W^- Z$ contribution can be as important as those arising from other
couplings including Higgs bosons, such as the standard model coupling WWH or
the two--Higgs--doublet model couplings $H^+ W^- \phi^0$ and $W W \phi^0$, with
$\phi^0=h$, $H$ and $A$.


title: Exclusive Higgs Boson Production with bottom quarks at Hadron Colliders

abstract:
  We present the next-to-leading order QCD corrected rate for the production of
a scalar Higgs boson with a pair of high p_T bottom and anti-bottom quarks at
the Tevatron and at the Large Hadron Collider. Results are given for both the
Standard Model and the Minimal Supersymmetric Standard Model. The exclusive
b-bbar-h production rate is small in the Standard Model, but it can be greatly
enhanced in the Minimal Supersymmetric Standard Model for large tan(beta),
making b-bbar-h an important discovery mode. We find that the next-to-leading
order QCD results are much less sensitive to the renormalization and
factorization scales than the lowest order results, but have a significant
dependence on the choice of the renormalization scheme for the bottom quark
Yukawa coupling.


title:
Analysis of Supersymmetric Effects on B -> phi K Decays in the PQCD
  Approach

abstract:
  We study the effects of the MSSM contribution on B -> phi K decays using the
perturbative QCD approach. In this approach, strong phases can be calculated,
so that we can predict the values of CP asymmetries with the MSSM contribution.
We predict a large relative strong phase between the penguin amplitude and the
chromomagnetic penguin amplitude. If there is a new CP violating phase in the
chromomagnetic penguin amplitude, then the CP asymmetries may change
significantly from the SM prediction. We parametrize the new physics
contributions that appear in the Wilson coefficients. We maximize the new
physics parameters up to the point where it is limited by experimental
constraints. In the case of the LR insertion, we find that the direct CP
asymmetries can reach about 85% and the indirect CP asymmetry can reach about
-30%.


title: On the charmed scalar resonances

abstract:
  It is discussed that a newly observed broad bump around 2.3 GeV in the D\pi
mass distribution can include two scalar resonances, and is predicted that a
broad scalar resonance can be observed around 2.45 GeV in the DK channels.


title: Inflationary attractor property of phantoms

abstract:
  There are some motivations to consider inflation driven by a phantom field.
Before entering into some specific models and perform data fitting, it is
important first investigating some general features that any viable inflation
model should hold. The inflationary attractor property is an important one of
those features. In this paper we will show that the inflationary attractor
property still holds for canonical and Born-Infeld phantom fields in the
standard Friedmann-Robertson-Walker cosmology, however, it does not hold for
canonical and Born-Infeld phantom fields in the Randall -Sundrum II cosmology.


title: Hadron Physics at COSY

abstract:
  The workshop 'Hadron Physics at COSY' held from July 7th to July 10th 2003 in
Bad Honnef brought together experimentalists and theoreticians from various
fields of hadron physics to identify the key physics questions, which can be
addressed with (un-) polarized proton and deuteron induced reactions at COSY.
Topics discussed include charge symmetry breaking, elastic and inelastic
nucleon-nucleon and nucleon-deuteron interactions, hadrons in the medium,
mesonic bound states, meson and baryon resonances, and the hyperon-nucleon
system. In addition prospects of the planned GSI facility were discussed. These
Miniproceedings contain besides short summaries of the presentations the most
relevant references for the field.


title: New Constraint on Squark Flavor Mixing from 199Hg Electric Dipole Moment

abstract:
  A new constraint is obtained on the CP-violating flavor mixing between the
left-handed top scalar quark (\tilde{t}_L) and charm scalar quark
(\tilde{c}_L), by considering a chargino loop contribution to chromo-electric
dipole moment of strange quark, which is limited by the electric dipole moment
of the ^{199}Hg atom. It is found that the flavor mixing should be suppressed
to the level of {\cal O}(0.1) for the CP phase of order unity, when \tan \beta
is relatively large and sparticle masses lie in a few hundred GeV range.
Although it is much stronger than the known constraint from the chargino loop
contribution to b \to s \gamma, the moderate constraint we obtain here is
argued to leave room for sizable supersymmetric contribution to the CP
asymmetry in B_d^0 \to \phi K_s.


title: Couplings varying on cosmological scales and Lorentz breaking

abstract:
  In the context of N=4 supergravity in four dimensions, we present an exact
classical solution that leads to spacetime-dependent electromagnetic couplings
and discuss the ensuing Lorentz-violating effects. We comment briefly on
experimental bounds.


title: Towards understanding $b\bar{b}$ production in $\gamma\gamma$ collisions

abstract:
  Understanding the data on the total cross section
$\sigma_{tot}($e$^+$e$^-\to$e$^+$e$^-b\bar{b})$ measured at LEP2 represents a
serious challenge for perturbative QCD. In order to unravel the origins of the
discrepancy between data and theory, we investigate the dependence of four
contributions to this cross section on $\gamma\gamma$ collision energy. As the
reliability of the existing calculations of
$\sigma_{tot}($e$^+$e$^-\to$e$^+$e$^-b\bar{b})$ depends, among other things, on
the stability of calculations of the cross section
$\sigma_{tot}(\gamma\gamma\to b\bar{b})$ with respect to variations of the
renormalization and factorization scales, we investigate this aspect in detail.
We show that in most of the region relevant for the LEP2 data the existing QCD
calculations of $\sigma_{tot}(\gamma\gamma\to b\bar{b})$ do not exhibit a
region of local stability and should thus be taken with caution. The source of
this instability is suggested and its phenomenological implications for LEP2
data are discussed.


title: Non-diagonal flavour observables in B and Collider Physics

abstract:
  Until now the focus within the direct search for supersymmetry has mainly
been on flavour diagonal observables. Recently lepton flavour violating signals
at future electron positron colliders have been studied. There is now an
opportunity to analyse the relations between collider observables and
low-energy observables in the hadronic sector. In a first work in this
direction, we study flavour violation in the squark decays of the second and
third generations taking into account results from B physics, in particular
from the rare decay b ->s gamma. Correlations between various squark decay
modes can be used to get more precise information on various flavour violating
parameters.


title: Neutralino pair production in a $\gamma \gamma$ Collider

abstract:
  We present a complete 1-loop study of the process $\gamma \gamma \to
\tchi^0_i \tchi^0_j$ and the predicted cross section in a $\gamma\gamma$ Linear
Collider. A suitable numerical code PLATONlc, valid for any set of real MSSM
parameters, is released. This study and code are complementary to those
suitable for Dark Matter detection through the inverse process $\tchi^0_i
\tchi^0_j \to \gamma\gamma$ describing neutralino-neutralino annihilation at
rest, which were presented previously. If SUSY is realized in Nature, both
codes should be very helpful in future astrophysical and collider studies of
the neutralino sector.


title: Diffractive large transferred momentum photoproduction of vector mesons

abstract:
  The large $t$ behaviour of the helicity amplitudes of diffractive
photoproduction is estimated relying on models of the photon and meson
light-cone wave functions and on the double-logarithmic approximation to the
exchanged gluon interaction. The role of large-size colour dipole contributions
to the photon-meson transition impact factor is discussed.


title: Confinement, Chiral Symmetry and Hadrons

abstract:
  The Polyakov loop is the appropriate deconfinement order parameter for
Yang-Mills theories without quarks or with quarks in the adjoint representation
of the gauge group. However it is not a physical state of the theory so the
information regarding the center group symmetry must be transferred to the
physical states. We briefly review how this transfer of information takes
place. When adding quarks the center group is no longer a symmetry for matter
in the fundamental representation. This feature allows us to explain why color
deconfines when chiral symmetry is restored in hot gauge theories with massless
quarks. For quarks in the adjoint representation we show that while
deconfinement and the chiral transition do not coincide, entanglement between
them is still present. Finally, we discuss also the chemical potential driven
phase transition.


title: Electromagnetic Form Factor of a Composed Particle in the Light-Front

abstract:
  The violation of the rotational symmetry constraint of the matrix elements of
the plus component of the vector current, in the Drell-Yan frame, is studied
using an analytical and covariant model of spin-1 composite particle. The
contributions from pair terms or zero modes, if missed cause the violation of
the rotational symmetry. We reanalyze the prescription by Grach and Kondratyuk
to extract form factors which can eliminate theses contributions in particular
models.


title:
On radiative widths and a pattern of quark-diquark-gluon configuration
  mixing in low-lying scalar mesons

abstract:
  The earlier suggested and developed idea of quark-hadron duality, underlying
"bremsstrahlung-weighted" sum rules for total or polarized photon interaction
cross sections, is applied to the description of excitation of light scalar
mesons in gamma-gamma interactions. The emphasis is put on the discussion of a
role of the scalar diquark cluster degrees of freedom in the radiative
formation of light scalar mesons.


title:
Effect of relativistic spin rotation for one- and two-particle spin
  states

abstract:
  The effect of the relativistic spin rotation, conditioned by the setting of
the spin in the rest frame of a particle and by the noncommutativity of the
Lorentz transformations along noncolinear directions, is discussed. In
connection with this, the Thomas precession of the spin polarization vector at
the motion of a particle along a curvilinear trajectory is considered. The
transformations of the correlation tensor components for a system of two
spin-1/2 particles at the transition from the c.m.s. of the particle pair to
the laboratory frame are investigated. When the particle laboratory velocities
are not colinear, the relativistic spin rotation angles for these particles are
different. As a result, the relative fractions of the singlet and triplet
states in the relativistic system of two free spin-1/2 particles with a nonzero
vector of relative momentum depend on the concrete frame in which this
two-particle system is analyzed.


title:
Improved Light-Cone Sum Rules for the Electromagnetic Form Factors of
  the Nucleon

abstract:
  We calculate the electromagnetic form factors of the nucleon within the
light-cone sum rule approach. In comparison to previous work (hep-ph/0112085)
we suggest to use a pure isospin-1/2 interpolating field for the nucleon, since
the Chernyak-Zhitnitsky current leads to numerically large, unphysical, isospin
violating contributions. The leading-order sum rules are derived for the form
factors and the results are confronted with the experimental data. Our approach
tends to favor the nucleon distribution amplitudes that are not far from the
asymptotic shape.


title:
Associated Production of CP-odd and Charged Higgs Bosons at Hadron
  Colliders

abstract:
  In the Minimal Supersymmetric Standard Model, the masses of the charged Higgs
boson ($H^\pm$) and the CP-odd scalar ($A$) are related by
$M_{H^+}^2=M_A^2+m_W^2$ at the Born level. Because the coupling of
$W^-$-$A$-$H^+$ is fixed by gauge interaction, the Born level production rate
of $q \bar q' \to W^{\pm \ast} \to A H^\pm$ depends only on one supersymmetry
parameter -- the mass ($M_A^{}$) of $A$. We examine the sensitivity of the LHC
to this signal event in the $A(\ra b {\bar b})H^+(\ra \tau^+ \nu_\tau)$ and
$A(\ra b {\bar b})H^+(\ra t {\bar b})$ decay channels. We illustrate how to
test the mass relation between $A$ and $H^+$ in case that the signal is found.
If the signal is not found, the product of the decay branching ratios of $A$
and $H^\pm$ predicted by the MSSM is bounded from above as a function of $M_A$.


title: On the short-distance constraints from K_{L,S} -> mu^+ mu^-

abstract:
  Motivated by new precise results on several $K_L$ decays, sensitive to the
${K_L \to \gamma \gamma}$ form factor, we present a new analysis of the $K_L\to
\mu^+\mu^-$ long-distance amplitude based on a semi-phenomenological approach.
Particular attention is devoted to the evaluation of the uncertainties of this
method and to the comparison with alternative approaches. Our main result is a
conservative upper bound of $2.5 \times 10^{-9}$ on $B(K_L \to \mu^+
\mu^-)_{\rm short}$, which is compatible with the SM expectation and which
provides significant constraints on new-physics scenarios. The possibility to
extract an independent short-distance information from future searches on $K_S
\to \mu^+ \mu^-$ is also briefly discussed.


title: A modified cluster-hadronization model

abstract:
  A new phenomenological cluster-hadronization model is presented. Its specific
features are the incorporation of soft colour reconnection, a more general
treatment of diquarks including their spin and giving rise to clusters with
baryonic quantum numbers, and a dynamic separation of the regimes of clusters
and hadrons according to their masses and flavours. The distinction between the
two regions automatically leads to different cluster decay and transformation
modes. Additionally, these aspects require an extension of individual
cluster-decay channels that were available in previous versions of such models.


title: Quark loop contribution to \pi^0 \to 4\gamma

abstract:
  We find the contribution of constituent quark loop mechanism to the branching
ratio B_{4\gamma} = \Gamma_{4\gamma}/\Gamma_{4\gamma} \sim 5.45 \cdot 10^{-16}
for the reasonable choice of constituent quark mass m \sim 280 MeV. This result
is in agreement with vector-dominance approach result obtained years ago. Thus
the main contribution arises from QED mechanism \pi^0 \to \gamma (\gamma^*) \to
\gamma (3\gamma) including light-light scattering block with electron loop.
This contribution was investigated in paper of one of us and gave B_{4\gamma}
\sim 2.6 \cdot 10^{-11}.


title: The End of the Constituent Quark Model?

abstract:
  In this conference summary talk at Hadron03, questions and challenges for
Hadron physics of light flavours are outlined. Precision data and recent
discoveries are at last exposing the limitations of the naive constituent quark
model and also giving hints as to its extension into a more mature description
of hadrons. These notes also pay special attention to the positive strangeness
baryon $\Theta^+(1540)$ and include a pedagogic discussion of wavefunctions in
the pentaquark picture, their relation with the Skyrme model and related issues
of phenomenology.


title: Molecular States of Heavy Quark Mesons

abstract:
  We explore molecular states of two open heavy-quark mesons (Q qbar)-(qbar Q)
in a quark-based model in terms of a four-body non-relativistic Hamiltonian
with pairwise effective interactions. Molecular states are found in the
combinations of {D, D*, B, B*} with {Dbar, Dbar*, Bbar, Bbar*}, including a
weakly-bound D-Dbar* state near the threshold which may be qualitatively
identified as the 3872 state observed recently by the Belle Collaboration.


abstract:
  Vector-Meson-Dominance model contribution to $\pi^0 \to 4\gamma$ is
calculated. The result confirms old estimates that this contribution is much
smaller than the purely electromagnetic photon spliting graph contribution
calculated earlier.


title: Alternative Theory of Neutrino Oscillations

abstract:
  The formulation of the alternative theory of neutrino oscillations is
presented. Also the application of that theory to a system of neutrinos
produced by a source is formulated and some basic formulae are derived.


title: The Gottfried sum rule: theory vs experiment

abstract:
  The current status of theoretical QCD calculations and experimental
measurements of the Gottfried sum rule are discussed. The interesting from our
point of view opened problems are summarised. Among them is the task of
estimating the measure of light-quark flavour asymmetry in possible future
experiments.


title: Higgs Boson Precision Studies at a Linear Collider

abstract:
  This report summarizes the progress in the study of Higgs physics at a future
linear electron positron collider at center-of-mass energies up to about 1000
GeV and high luminosity. After the publication of the TESLA Technical Design
Report, an extended ECFA/DESY study on linear collider physics and detectors
was performed. The paper summarizes the status of the studies with main
emphasis on recent results obtained in the course of the workshop.


title: The effect of very low energy solar neutrinos on the MSW mechanism

abstract:
  We study some implications on standard matter oscillations of solar neutrinos
induced by a background of extremely low energy thermal neutrinos trapped
inside the Sun by means of coherent refractive interactions. Possible
experimental tests are envisaged and current data on solar neutrinos detected
at Earth are briefly discussed.


title: Soft colour interactions and diffractive Higgs production

abstract:
  The topical subject of Higgs production in diffractive hard scattering events
at the Tevatron and LHC is discussed. This has been proposed as a Higgs
discovery channel with appealing experimental features. Predictions are
obtained from the Soft Colour Interaction model, where rapidity gaps are
created by a new soft interaction added to the normal hard scattering
processes, implemented in the Monte Carlo event generator PYTHIA. A brief
review of the successful application of the model to describe all CDF and DO
data on diffractive hard scattering, such as production of W/Z, dijets, beauty
and J/psi is also given.


title: The Low-Energy Structure of Little Higgs Models

abstract:
  The mechanism of electroweak symmetry breaking in Little Higgs Models is
analyzed in an effective field theory approach. This enables us to identify
observable effects irrespective of the specific structure and content of the
heavy degrees of freedom. We parameterize these effects in a common operator
basis and present the complete set of anomalous contributions to gauge-boson,
Higgs, and fermion couplings. If the hypercharge assignments of the model
retain their standard form, electroweak precision data are affected only via
the S and T parameters and by contact interactions. As a proof of principle, we
apply this formalism to the minimal model and consider the current constraints
on the parameter space. Finally, we show how the interplay of measurements at
LHC and a Linear Collider could reveal the structure of these models.


title:
Analytic Amplitudes for Hadronic Forward Scattering and the Heisenberg
  ln**2 Behaviour of Total Cross Section

abstract:
  The ln**2 behaviour of total cross sections, first obtained by Heisenberg 50
years ago, receives now increased interest both on phenomenological and
theoretical levels. We present a modification of the Heisenberg's model in
connection with the presence of glueballs and we show that it leads to a
realistic description of all existing hadron total cross-section data, in
agreement with the COMPETE analysis.


title:
Towards high precision predictions for top quark pair production and
  decay at a linear collider

abstract:
  We report on the progress in work on improving precision of the standard
model theoretical predictions for the top quark pair production and decay into
six fermions at a linear collider. Two programs have been combined into a
single Monte Carlo program: 'eett6f', a MC program for e+e- -> 6f, and
'topfit', a program for electroweak radiative corrections to e+e- -> t\bar t.
The MC program is described and preliminary numerical results are shown.


title: Day-night effect in solar neutrino oscillations with three flavors

abstract:
  We investigate the effects of a nonzero leptonic mixing angle $\theta_{13}$
on the solar neutrino day-night asymmetry. Using a constant matter density
profile for the Earth and well-motivated approximations, we derive analytical
expressions for the $\nu_e$ survival probabilities for solar neutrinos arriving
directly at the detector and for solar neutrinos which have passed through the
Earth. Furthermore, we numerically study the effects of a non-zero
$\theta_{13}$ on the day-night asymmetry at detectors and find that they are
small. Finally, we show that if the uncertainties in the parameters
$\theta_{12}$ and $\Delta m^2$ as well as the uncertainty in the day-night
asymmetry itself were much smaller than they are today, this effect could, in
principle, be used to determine $\theta_{13}$.


title:
Energy dependence of Cronin momentum in saturation model for $p+A$ and
  $A+A$ collisions

abstract:
  We calculate $\sqrt{s}$ dependence of Cronin momentum for $p+A$ and $A+A$
collisions in saturation model. We show that this dependence is consistent with
expectation from formula which was obtained using simple dimentional
consideration. This can be used to test validity of saturation model (and
distinguish among its variants) and measure $x$ dependence of saturation
momentum from experimental data.


title: New nonrenormalization theorems for anomalous three point functions

abstract:
  Nonrenormalization theorems involving the transverse, i.e. non anomalous,
part of the <VVA> correlator in perturbative QCD are proven. Some of their
consequences and questions they raise are discussed.


title:
Applications of Perturbative Quantum Chromodynamics to Processes with
  Heavy Quarks

abstract:
  In this thesis we study the b-quark fragmentation in top decay as well as the
effect of the threshold resummation on heavy quark production in
charged-current DIS.
  To predict the spectrum of b-flavored hadrons in top decay, we calculate at
NLO the QCD corrections for bottom production in top decay with the b-mass
fully taken into account. Using the perturbative fragmentation function
formalism we then resum with NLL accuracy large collinear logs of the ratio of
bottom-to-top mass, which leads to an essential improvement of the result. Next
we perform the threshold resummation for the coefficient function for top decay
with NLL accuracy. That resummation leads to an important improvement of the
b-spectrum in the large energy fraction region. Finally, we extract information
for the non-perturbative b-fragmentation into hadrons from e^+e^- data and make
a prediction for the spectrum of those b-flavored hadrons produced in top-quark
decay. Our second application is to charm production in charged-current DIS. We
first calculate with NLL accuracy the soft-gluon resummed coefficient function
for heavy quark production (initiated by a light quark) in DIS. Our result is
applicable for the case of low momentum transfer that is of the order of the
mass of the heavy quark. We also make a connection of this result to the known
result for massless quark production. We then apply this result for charm quark
production at NuTeV and HERA for a wide range of the transferred momentum, and
present the effect of the resummation on the charm structure functions.


title: Strong Decays: Past, Present and Future

abstract:
  In this talk I review the history of models of strong decays, from the
original model through applications to charmonium, light and charmed mesons,
glueballs and hybrids. Our current rather limited understanding of the QCD
mechanism of strong decays is stressed. Regarding current and future
applications of strong decay models, we note that in certain channels the very
strong coupling predicted between |qqbar> basis states and the two-meson
continuum may lead to strongly mixed states and perhaps molecular two-meson
bound states. The relevance to the D_{sJ}*(2317) is discussed.


title: Nonlinear Propagation of Incoherent Photons in a Radiation Background

abstract:
  The nonlinear propagation of intense incoherent photons in a photon gas is
considered. The photon-photon interactions are governed by a pair of equations
comprising a wave-kinetic equation for the incoherent photons in the presence
of the slowly varying energy density perturbations of sound-like waves, and an
equation for the latter waves in a background where the photon coupling is
caused by quantum electrodynamical effects. The coupled equations are used to
derive a dispersion relation, which admits new classes of modulational
instabilities of incoherent photons. The present instabilities can lead to
fragmentation of broadband short photon pulses in astrophysical and laboratory
settings.


title: CP Violation in B Decays within QCD Factorization

abstract:
  We analyze the extraction of weak phases from CP violation in
$B\to\pi^+\pi^-$ decays. By combining the information on mixing induced CP
violation in $B\to\pi^+\pi^-$, namely $S_{\pi\pi}$, with the precision
observable $\sin 2\beta$ obtained from the ``gold-plated''mode $B\to\psi K_S$,
we propose the determination of the unitarity triangle. We also discuss
alternative ways to analyze $S_{\pi\pi}$ which can be useful if new physics
affects $B_d$--$\bar B_d$ mixing. Predictions and uncertainties for $r$ and
$\phi$ in QCD factorization are examined in detail. It is pointed out that a
simultaneous expansion in $1/m_b$ and $1/N_C$ leads to interesting
simplifications. At first order infrared divergences are absent, while the most
important effects are retained. Independent experimental tests of the
factorization framework are briefly discussed.


title: NLO QCD corrections to hadronic Higgs production with heavy quarks

abstract:
  The production of a Higgs boson in association with a pair of top-antitop or
bottom-antibottom quarks plays a very important role at both the Tevatron and
the Large Hadron Collider. The theoretical prediction of the corresponding
cross sections has been improved by including the complete next-to-leading
order QCD corrections. After a brief description of the most relevant technical
aspects of the calculation, we review the results obtained for both the
Tevatron and the Large Hadron Collider


title:
Sneutrino condensate source for density perturbations, leptogenesis and
  low reheat temperature

abstract:
  We bring together some known ingredients beyond the Standard Model physics
which can explain the hot Big Bang model with the observed baryon asymmetry and
also the fluctuations in the cosmic microwave background radiation with a
minimal set of assumptions. We propose an interesting scenario where the
inflaton energy density is dumped into an infinitely large extra dimension.
Instead of the inflaton it is the right handed sneutrino condensate, which is
acquiring non-zero vacuum expectation value during inflation, whose
fluctuations are responsible for the density perturbations seen in the cosmic
microwave background radiation with a spectral index $n_s\approx 1$. The decay
of the condensate is explaining the reheating of the Universe with a
temperature, $T_{rh}\leq 10^{9}$ GeV, and the baryon asymmetry of order one
part in $10^{10}$ with no baryon-isocurvature fluctuations.


title: Impact of CP phases on a light sbottom and gluino sector

abstract:
  We study a scenario in which light bottom squarks and light gluinos with
masses in the range $2-5.5$ GeV and 12-16 GeV, respectively, can coexist in the
MSSM, without being in conflict with flavor-conserving low-energy observables.
We find that in such a scenario, the anomalous magnetic moment of a muon could
be as large as $10^{-9}$, if the theory conserves CP. However, if the theory
violates CP, we conclude that not both, the gluino and bottom squark, can be
light at the same time, after the neutron electric dipole moment constraint on
Weinberg's 3-gluon operator has been taken into account.


title: Magnetic Moment of The $\Theta^+$ Pentaquark State

abstract:
  We have calculated the magnetic moment of the recently observed $\Theta^+$
pentaquark in the framework of the light cone QCD sum rules using the photon
distribution amplitudes. We find that $\mu_{\Theta^+}=(0.12\pm 0.06) \mu_N$,
which is quite small. We also compare our result with predictions of other
groups.


title:
The Chiral Phase Transition of hot QCD from the Exact Renormalization
  Group

abstract:
  The chiral phase transition of the finite temperature QCD is discussed in the
ladder approximated Exact (Wilson's) Renormalization Group (ERG). The gluon
thermal mass is incorporated by the Hard Thermal Loop (HTL) approximation. We
calculated a critical temperature $T_c$, a critical exponent $\nu$, and order
parameters such as chiral condensate $<\bar{\psi}\psi>$ and pion decay
constants with this approximation. The dependences of the pion decay constants
on an unphysical parameter are fairly improved by including contributions from
momentum dependent vertices. The critical temperature was found as: $T_c\approx
124$ MeV for 3-flavors. It was shown that the critical temperature considerably
depends on the approximation scheme for the gluon thermal mass term. We also
calculated the temperature dependence of the chiral condensate, $\pi$ decay
constants, and the pion velocity.


title:
Do we understand the single-spin asymmetry for $pi^0$ inclusive
  production in pp collisions?

abstract:
  The cross section data for $\pi^0$ inclusive production in $pp$ collisions is
considered in a rather broad kinematic region in energy $\sqrt{s}$, Feynman
variable $x_F$ and transverse momentum $p_T$. The analysis of these data is
done in the perturbative QCD framework at the next-to-leading order. We find
that they cannot be correctly described in the entire kinematic domain and this
leads us to conclude that the single-spin asymmetry, $A_N$ for this process,
observed several years ago at FNAL by the experiment E704 and the recent result
obtained at BNL-RHIC by STAR, are two different phenomena. This suggests that
STAR data probes a genuine leading-twist QCD single-spin asymmetry for the
first time and finds a large effect.


title: Parallel Computation of Feynman diagrams with DIANA

abstract:
  Co-operation of the Feynman DIagram ANAlyzer (DIANA) with the underlying
operational system (UNIX) is presented. We discuss operators to run external
commands and a recent development of parallel processing facilities and an
extension in the spirit of a component model.


title: Determination of the $\Theta^+$ parity from $\gamma n \to K^- K^+ n$

abstract:
  It is demonstrated that measurements of photon asymmetry in the $\gamma n \to
K^- K^+ n$ reaction, can most likely determine the parity of the newly
discovered $\Theta^+$ pentaquark. We predict that if the parity of $\Theta^+$
is positive, the photon asymmetry is significantly positive; if the parity is
negative, the photon asymmetry is significantly negative. If the background
contribution is large, the photon asymmetry may become very small in magnitude,
thereby making it difficult to distinguish between the positive and negative
parity results. However, even in this case, a combined analysis of the $(K^+
n)$ invariant mass distribution and photon asymmetry should allow a
determination of the parity of $\Theta^+$.


title: Isospin Breaking in $K_{\ell 4}$ Decays of the Neutral Kaon

abstract:
  In the presence of photons, the neutral $K_{\ell 4}$ decay,
$K^0\to\pi^0\pi^-\ell^+\nu_\ell$, can be parameterized in terms of three
vectorial, one anomalous, and one tensorial form factors. We present here
analytic expressions of two vectorial form factors, $f$ and $g$, calculated at
one-loop level in the framework of chiral perturbation theory based on the
effective Lagrangian including mesons, photons, and leptons. These expressions
may then be used to disentangle the Isospin breaking part from the measured
form factors and hence improve the accuracy in the determination of $\pi\pi$
scattering parameters from $K_{\ell 4}$ experiments.


title:
Open Questions Related to Bose-Einstein Correlations in e+ e- -->
  Hadrons

abstract:
  Questions concerning the Bose-Einstein (BEC) and Fermi-Dirac (FDC)
correlations of hadrons produced in $e^+e^-$ collisions are discussed. Among
them the emitter dimension $r$ as a function of $\sqrt{s_{ee}}$ and the hadron
mass, the extension of the BEC by including isospin invariance and the proposed
relation between $r$ and the inter-atomic separation in Bose condensates.


title: Constraints on lepton flavour violation and leptogenesis

abstract:
  We consider the scenario of direct leptogenesis from the decays of heavy
sneutrino which also plays a role of inflaton. We calculate its predictions for
flavour-violating decays of charged leptons. We find that mu -> e gamma should
occur close to the present experimental upper limits, as might also tau -> mu
gamma.


title:
How to extract the $\Lambda N$ scattering length from production
  reactions

abstract:
  A dispersion integral is derived that allows one to relate directly (spin
dependent) $\Lambda N$ invariant mass spectra, measured in a large-momentum
transfer reaction such as $pp\to K^+p\Lambda$ or $\gamma d\to K^+n\Lambda$, to
the scattering length for elastic $\Lambda N$ scattering. The involved
systematic uncertainties are estimated to be smaller than 0.3 fm. This estimate
is confirmed by comparing results of the proposed formalism with those of
microscopic model calculations. We also show, for the specific reaction $pp\to
K^+\Lambda p$, how polarization observables can be used to separate the two
spin states of the $\Lambda N$ system.


title: Meson-Baryon Couplings from QCD Sum Rules

abstract:
  Coupling constants of the pseudoscalar mesons to the octet baryons are
calculated in the QCD sum rule approach. Two-point correlation function of the
baryons are evaluated in a single meson state and the vacuum, which yields the
designated coupling. The emphasis is on the flavor SU(3) structure of the
coupling constants and reliability in extracting the coupling constants from
the two-point correlation functions. We first calculate the baryon-diagonal
couplings and study the reliability of the sum rule. The F/D ratio of the
coupling is determined in the SU(3) limit. We further formulate the
baryon-off-diagonal couplings using the projected correlation functions and the
vertex functions, so that the unwanted excited states do not contaminate the
sum rule. As an example, the (\pi - \Lambda - \Sigma) coupling constant is
calculated and the flavor SU(3) breaking effect is studied. We find that the
effect of SU(3) breaking on the (\pi - \Lambda - \Sigma) coupling constant is
small.


title:
Simulation Methods of the Processes $B \to \pi^+ \pi^- V$ including
  $\rho^0-\omega$ Mixing Effects

abstract:
  Simulation methods for the decays $ B \to {\pi}^+ {\pi}^- V$, where $V$ is a
$1^{--}$ vector-meson, are presented in detail. Emphasis is put on the use of
the helicity formalism and the use of effective Lagrangians. We show the
importance of ${{\rho}^{0}}-{\omega}$ mixing in enhancing the direct $CP$
violation (DCPV) when the pion-pion invariant mass is near the mass of the
$\omega$.


title:
The Quark-Mass Dependence of T_C in QCD: Working up from m=0 or down
  from m=infinity ?

abstract:
  We analyze the dependence of the QCD transition temperature on the quark (or
pion) mass. We find that a linear sigma model, which links the transition to
chiral symmetry restoration, predicts a much stronger dependence of T_c on m_pi
than seen in present lattice data for m_pi >~ 0.4 GeV. On the other hand,
working down from m_pi=infinity, an effective Lagrangian for the Polyakov loop
requires only small explicit symmetry breaking, b_1 ~ exp(-m_pi), to describe
T_c(m_pi) in the above mass range. Physically, this is a consequence of the
flat potential (large correlation length) for the Polyakov loop in the
three-color pure gauge theory at T_c. We quantitatively estimate the end point
of the line of first order deconfining phase transitions: m_pi = 1.8 GeV and Tc
= 240 MeV for three flavors and three colors.


title:
Resumming QCD vacuum fluctuations in three-flavour Chiral Perturbation
  Theory

abstract:
  Due to its light mass of order Lambda_QCD, the strange quark can play a
special role in Chiral Symmetry Breaking (ChSB): differences in the pattern of
ChSB in the limits N_f=2 (m_u,m_d->0, m_s physical) and N_f=3 (m_u,m_d,m_s->0)
may arise due to vacuum fluctuations of s-bar s pairs, related to the violation
of the Zweig rule in the scalar sector and encoded in particular in the O(p^4)
low-energy constants L_4 and L_6. In case of large fluctuations, we show that
the customary treatment of SU(3)xSU(3) chiral expansions generate instabilities
upsetting their convergence. We develop a systematic program to cure these
instabilities by resumming nonperturbatively vacuum fluctuations of s-bar s
pairs, in order to extract information about ChSB from experimental
observations even in the presence of large fluctuations. We advocate a Bayesian
framework for treating the uncertainties due to the higher orders. As an
application, we present a three-flavour analysis of the low-energy pi-pi
scattering and show that the recent experimental data imply a lower bound on
the quark mass ratio 2m_s/(m_u+m_d) > 14 at 95 % confidence level. We outline
how additional information may be incorporated to further constrain the pattern
of ChSB in the N_f=3 chiral limit.


title:
Energy dependence of the single spin asymmetries in inclusive pion
  production processes

abstract:
  Recent data from E925 Collaboration at Brookheaven National Laboratory show a
significant energy dependence of the single-spin left-right asymmetry in
inclusive hadron production in hadron-hadron collisions. We analyzed the
experimental results and show that the observed energy dependence can be
reproduced naturally in the picture proposed in a previous Letter. We fixed all
the parameters at the Fermilab E704 energy and calculate the asymmetry at the
BNL E925 energy. We compare the results with the data and make predictions for
experiments at even higher energies.


title:
New Predictions for Electroweak O(\alpha) Corrections to
  Neutrino--Nucleon Scattering

abstract:
  We calculate the O(\alpha) electroweak corrections to charged- and
neutral-current deep-inelastic neutrino scattering off an isoscalar target. The
full one-loop-corrected cross sections, including hard photonic corrections,
are evaluated and compared to an earlier result which is the basis of the NuTeV
analysis. In particular, we compare results that differ in input-parameter
scheme, treatment of real photon radiation and factorization scheme. The
associated shifts in the theoretical prediction for the ratio of neutral- and
charged-current cross sections can be larger than the experimental accuracy of
the NuTeV result.


title:
SUSY Les Houches Accord: Interfacing SUSY Spectrum Calculators, Decay
  Packages, and Event Generators

abstract:
  An accord specifying a unique set of conventions for supersymmetric
extensions of the Standard Model together with generic file structures for 1)
supersymmetric model specifications and input parameters, 2) electroweak scale
supersymmetric mass and coupling spectra, and 3) decay tables is defined, to
provide a universal interface between spectrum calculation programs, decay
packages, and high energy physics event generators.


title:
On The Method of Precise Calculations Of Energy Levels of Hydrogen-like
  Atoms

abstract:
  We describe a method for deriving logarithmic corrections in the mass ratio
to the S-level of a hydrogen-like atom. With this method, a number of new
corrections of this type are calculated analitically for the first time.


title: The Evidence for a Pentaquark Signal and Kinematic Reflections

abstract:
  Several recent experiments have reported evidence for a narrow baryon
resonance with positive strangeness ($\Theta^+$) at a mass of 1.54 GeV/$c^2$.
Baryons with $S=+1$ cannot be conventional $qqq$ states and the reports have
thus generated much theoretical speculation about the nature of possible $S=+1$
baryons, including a 5-quark, or pentaquark, interpretation. We show that
narrow enhancements in the $K^+n$ effective mass spectrum can be generated as
kinematic reflections resulting from the decay of mesons, such as the
$f_2(1275)$, the $a_2(1320)$ and the $\rho_3(1690)$.


title: CP Violation Beyond the Standard Model

abstract:
  I review CP-violating signals of physics beyond the standard model in the B
system. I examine the prospects for finding these effects at future colliders,
with an emphasis on hadron machines.


title: Model Building with Gauge-Yukawa Unification

abstract:
  In supersymmetric theories with extra dimensions, the Higgs and matter fields
can be part of the gauge multiplet, so that the Yukawa interactions can arise
from the gauge interactions. This leads to the possibility of gauge-Yukawa
coupling unification, g_i=y_f, in the effective four dimensional theory after
the initial gauge symmetry and the supersymmetry are broken upon orbifold
compactification. We consider gauge-Yukawa unified models based on a variety of
four dimensional symmetries, including SO(10), SU(5), Pati-Salam symmetry,
trinification, and the Standard Model. Only in the case of Pati-Salam and the
Standard Model symmetry, we do obtain gauge-Yukawa unification. Partial
gauge-Yukawa unification is also briefly discussed.


title: Chiral Perturbation Theory in a Nuclear Background

abstract:
  We propose a novel way to formulate Chiral Perturbation Theory in a nuclear
background, characterized by a static, non-uniform distribution of the baryon
number that describes the finite nucleus. In the limiting case of a uniform
distribution, the theory reduces to the well-known zero-temperature in-medium
ChPT. The proposed approach is used to calculate the self-energy of the charged
pion in the background of the heavy nucleus at O(p^5) in the chiral expansion,
and to derive the leading terms of the pion-nucleus optical potential.


title: TeV Scale Leptogenesis With Heavy Neutrinos

abstract:
  Following a baryogenesis scenario proposed by Lazarides, Panagiotakopoulos
and Shafi, we show how the observed baryon asymmetry can be explained via
resonant leptogenesis in a class of supersymmetric models with an intermediate
mass scale M_I<~10^9 GeV. It involves the out of equilibrium decay of heavy
(<~M_I) right handed neutrinos at a temperature close to the TeV supersymmetry
breaking scale. Such models can also resolve the MSSM mu problem.


title: The B_s and D_s decay constants in 3 flavor lattice QCD

abstract:
  Capitalizing on recent advances in lattice QCD, we present a calculation of
the leptonic decay constants f_{B_s} and f_{D_s} that includes effects of one
strange sea quark and two light sea quarks. The discretization errors of
improved staggered fermion actions are small enough to simulate with 3
dynamical flavors on lattices with spacings around 0.1 fm using present
computer resources. By shedding the quenched approximation and the associated
lattice scale ambiguity, lattice QCD greatly increases its predictive power.
NRQCD is used to simulate heavy quarks with masses between 1.5 m_c and m_b. We
arrive at the following results: f_{B_s} = 260 \pm 7 \pm 26 \pm 8 \pm 5 MeV and
f_{D_s} = 290 \pm 20 \pm 29 \pm 29 \pm 6 MeV. The first quoted error is the
statistical uncertainty, and the rest estimate the sizes of higher order terms
neglected in this calculation. All of these uncertainties are systematically
improvable by including another order in the weak coupling expansion, the
nonrelativistic expansion, or the Symanzik improvement program.


title: Photon Physics in Heavy Ion Collisions at the LHC

abstract:
  Various pion and photon production mechanisms in high-energy nuclear
collisions at RHIC and LHC are discussed. Comparison with RHIC data is done
whenever possible. The prospect of using electromagnetic probes to characterize
quark-gluon plasma formation is assessed.


title: Variational Two Fermion Wave Equations in QED: Muonium Like Systems

abstract:
  We consider a reformulation of QED in which covariant Green functions are
used to solve for the electromagnetic field in terms of the fermion fields. The
resulting modified Hamiltonian contains the photon propagator directly. A
simple Fock-state variational trial function is used to derive relativistic
two-fermion equations variationally from the expectation value of the
Hamiltonian of the field theory. The interaction kernel of the equation is
shown to be, in essence, the invariant M-matrix in lowest order. Solutions of
the two-body equations are presented for muonium like system for small coupling
strengths. The results compare well with the observed muonium spectrum, as well
as that for hydrogen and muonic hydrogen. Anomalous magnetic moment effects are
discussed.


title:
$\pi\pi$ Invariant mass spectrum in $V'\to V~\pi\pi$ and the $f_0(600)$
  pole

abstract:
  We consider the phenomenological description of the two pion invariant mass
spectrum in the $V' \to V \pi\pi$ decays. We study the parametrization of the
amplitude involving both $S$ and $D$ wave contributions. From a fit to the two
pion decays of the $ \Upsilon(nS)$ and $\Psi(nS)$ we determine the $f_0 (600)$
mass and width to be $m_{f_0}=528 \pm 32$ MeV and $\Gamma_{f_0}=413\pm 45$ MeV.
The mass and width values we report correspond to the real and imaginary part
of the S matrix pole respectively.


title: Radiative Corrections to One-Photon Decays of Hydrogenic Ions

abstract:
  Radiative corrections to the decay rate of n=2 states of hydrogenic ions are
calculated. The transitions considered are the M1 decay of the 2s state to the
ground state and the E1(M2) decays of the $2p_{1/2}$ and $2p_{3/2}$ states to
the ground state. The radiative corrections start in order $\alpha (Z
\alpha)^2$, but the method used sums all orders of $Z\alpha$. The leading
$\alpha (Z\alpha)^2$ correction for the E1 decays is calculated and compared
with the exact result. The extension of the calculational method to parity
nonconserving transitions in neutral atoms is discussed.


title: Global analysis of B-->PP, PV charmless decays with QCD factorization

abstract:
  The global analysis of B-->PP, PV charmless decays with QCD factorization
(QCDF) is presented. The predictions of QCDF are in good agreement with
experiments. The best fitted CKM angel gamma is around 79 degree. The predicted
branching ratios of B --> pi^0 pi^0, omega K^+, omega pi^+, pi^+ K^{{\ast}0}
etc. are also in good agreement with new data of BaBar and Belle


title: Color Ferromagnetism and Quantum Hall states in Quark Matter

abstract:
  We discuss a possibility of the presence of a stable color ferromagnetic
state in SU(2) gauge theory of quark matter; a color magnetic field is
spontaneously generated due tothe gluon's dynamics. The state arises between
the hadronic state and the color superconducting state when the density of
quarks is varied. Although the state has been known to have unstable modes, we
show that unstable modes form quantum Hall states, in which the instability
disappears. Namely, the quark matter possesses a stable phase with the
ferromagnetic state and the quantum Hall state of gluons.


title: QCD Corrections to Hadronic Z and tau Decays

abstract:
  We present a brief (mainly bibliographical) report on recently performed
calculations of terms of order O(\alpha_s^4 n_f^2) and O(\alpha_s^4 n_f^2
m_q^2) for hadronic Z and \tau decay rates. A few details about the analytical
evaluation of the masters integrals appearing in the course of calculations are
presented.


title: Physics at a gamma gamma, e gamma and e-e- Option for a Linear Collider

abstract:
  This report presents a review of the studies made in the working group on
gamma gamma and e gamma physics" of the ECFA/DESY workshop on linear collider
physics. It reports on several new physics studies, in particular s-channel
Higgs production. A summary of R&D activities for the interaction region is
presented. The merits of e-e- collisions are briefly recalled.


title: Nonlocal effects in high energy charged particle beams

abstract:
  Within the framework of the thermal wave model, an investigation is made of
the longitudinal dynamics of high energy charged particle beams. The model
includes the self-consistent interaction between the beam and its surroundings
in terms of a nonlinear coupling impedance, and when resistive as well as
reactive parts are included, the evolution equation becomes a generalised
nonlinear Schroedinger equation including a nonlocal nonlinear term. The
consequences of the resistive part on the propagation of particle bunches are
examined using analytical as well as numerical methods.


title: Accessing the pion distribution amplitude through the CLEO and E791 data

abstract:
  Using QCD perturbation theory in NLO and light-cone QCD sum rules, we extract
from the CLEO experimental data on the F^{\gamma^*\gamma\pi}(Q^{2} transition
form factor constraints on the Gegenbauer coefficients a_2 and a_4, as well as
on the inverse moment <x^{-1}>_{\pi} of the pion distribution amplitude. We
show that both the asymptotic and the Chernyak--Zhitnitsky pion distribution
amplitudes are excluded at the 3\sigma- and 4\sigma-level, respectively, while
the data confirms the end-point suppressed shape of the pion DA we previously
obtained with QCD sum rules and nonlocal condensates. These findings are also
supported by the data of the Fermilab E791 experiment on diffractive dijet
production.


title: Neutrino oscillations in the Sun probe long-range leptonic forces

abstract:
  Lepton number charges might be the source of long range forces. If one
accepts that neutrinos produced in the Sun do indeed oscillate while crossing
the interior of the Sun, then the shift in the phase of the neutrino
wavefunction caused by an hypothetical potential associated to the leptonic
charge of the electrons in the Sun could affect the oscillation pattern beyond
what is actually observed. We show that a "fine structure" constant
$\alpha_{L}$ in excess of $6.4 \times 10^{-54}$ is incompatible with present
observational data. This bound is not valid for forces whose range is shorter
than the size of the Sun.


title:
Hierarchical Matrices in the See-Saw Mechanism, large Neutrino Mixing
  and Leptogenesis

abstract:
  We consider the see-saw mechanism for hierarchical Dirac and Majorana
neutrino mass matrices m_D and M_R, including the CP violating phases. Simple
arguments about the structure of the neutrino mass matrix and the requirement
of successful leptogenesis lead to the situation that one of the right-handed
Majorana neutrinos is much heavier than the other two, which in turn display a
rather mild hierarchy. It is investigated how for the neutrino mixing one small
and two large angles are generated. The mixing matrix element |U_{e3}|^2 is
larger than 10^{-3} and a characteristic ratio between the branching ratios of
lepton flavor violating charged lepton decays \ell_j -> \ell_i \gamma is found.
Successful leptogenesis implies sizable CP violation in oscillation
experiments. As in the original minimal see-saw model, the signs of the baryon
asymmetry of the universe and of the CP asymmetry in neutrino oscillations are
equal and there is no connection between the leptogenesis phase and the
effective mass as measurable in neutrinoless double beta decay.


title: Light and Heavy Dark Matter Particles

abstract:
  It has recently been pointed out that the 511 keV emission line detected by
Integral/SPI from the bulge of our galaxy could be explained by annihilations
of light Dark Matter particles into e^+ e^-. If such a signature is confirmed,
then one might expect a conflict with the interpretation of very high energy
gamma rays if they also turn out to be due to Dark Matter annihilations. Here,
we propose a way to accomodate the existence of both signals being produced by
Dark Matter annihilations through the existence of two stable (neutral) Dark
Matter particles, as is possible in theories inspired from N=2 supersymmetry.


title: The scalar meson sector and the sigma, kappa problem

abstract:
  In the light scalar meson sector (M < 1.8 GeV) one expects at least one q
qbar nonet and a glueball, possibly also multi-quark states. We discuss the
present phenomenological evidence for sigma and kappa particles; if real, they
could be members of the lightest (quark or multi-quark) nonet together possibly
with a_0(980) and f_0(980). Alternatively, the lightest nonet could include
f_0(980) but not sigma and kappa. Future decisive experimental studies,
concerning tests of symmetry relations, especially in B-decays, are outlined.


title:
Master Integrals for the 2-loop QCD virtual corrections to the
  Forward-Backward Asymmetry

abstract:
  We present the Master Integrals needed for the calculation of the two-loop
QCD corrections to the forward-backward asymmetry of a quark-antiquark pair
produced in electron-positron annihilation events. The abelian diagrams
entering in the evaluation of the vector form factors were calculated in a
previous paper. We consider here the non-abelian diagrams and the diagrams
entering in the computation of the axial form factors, for arbitrary space-like
momentum transfer Q^2 and finite heavy quark mass m. Both the UV and IR
divergences are regularized in the continuous D-dimensional scheme. The Master
Integrals are Laurent-expanded around D=4 and evaluated by the differential
equation method; the coefficients of the expansions are expressed as
1-dimensional harmonic polylogarithms of maximum weight 4.


title: Pion form factor and QCD sum rules: case of pseudoscalar current

abstract:
  We present an analysis of QCD sum rules for pion form factor in
next-to-leading order of perturbation theory for the case of pseudoscalar pion
currents. The essential instanton contribution is reanalysed with account for
present more accurate values of parameters entering Single Instanton
Approximation (SIA). The theoretical curve obtained for Q^2 dependence of pion
form factor is in a good agreement with existing experimental data. To
calculate NLO corrections for double spectral densities we developed an
effective computational technic. The details of the method together with the
results for pion form factor in a more theoretically clean case of axial
interpolating currents will be presented elsewhere.


title: Low-energy Universality and the New Charmonium Resonance at 3870 MeV

abstract:
  The recently-discovered narrow charmonium resonance near 3870 MeV is
interpreted as a hadronic molecule whose constituents are the charm mesons D^0
and \bar D^{*0} or \bar D^0 and D^{*0}. Because of an accidental fine-tuning of
the molecule to very near the D^0 \bar D^{*0} threshold, it has some universal
properties that are completely determined by the unnaturally large D^0 \bar
D^{*0} scattering length a. Its narrow width can be explained by the
suppression by a factor of 1/a of decay modes other than the decay of a
constituent \bar D^{*0} or D^{*0}. Its production rates are also suppressed by
a factor of 1/a. A particularly predictive mechanism for generating the large
scattering length is the accidental fine-tuning of a P-wave charmonium state to
the D^0 \bar D^{*0} threshold.


title: Precise Prediction for the W-Boson Mass in the Standard Model

abstract:
  The presently most accurate prediction for the W-boson mass in the Standard
Model is obtained by combining the complete two-loop result with the known
higher-order QCD and electroweak corrections. The numerical impact of the
different contributions is analysed in detail. A simple parametrisation of the
full result is presented, which approximates the full result for M_W to better
than 0.5 MeV for 10 GeV < M_H < 1 TeV if the other parameters are varied within
their combined 2 sigma region around their experimental central values. The
different sources of remaining theoretical uncertainties are investigated.
Their effect on the prediction of M_W is estimated to be about 4 MeV for M_H <
300 GeV.


title:
Radiative corrections to scalar-fermion pair production in high energy
  e+e- collisions

abstract:
  We study the one-loop radiative corrections to pair production of the
supersymmetric scalar partners of the standard fermions in e+e- annihilation.
Both electroweak and SUSY-QCD corrections are considered. Applications are for
production of scalar fermions of the third generation, $e^+e^-\to \wt{f}_i
\wt{f}_j^*$ (i,j=1,2), $f=t, b,\tau$, as well as for production of scalar
quarks of the first and second generation. Effects on integrated cross sections
are discussed and also the one-loop induced forward-backward asymmetries are
studied. It is found that at low energy, \sqrt{s}\approx 500 \to 1000 GeV, the
corrections are dominated by the QCD contributions, At high energy,
$\sqrt{s}\geq 2$ TeV, the electroweak box diagrams give a substantial
contribution and even dominate in some regions of parameters space. The purely
loop-induced forward-backward asymmetry can reach values of several per cent.


title:
Decay constants of the pion and B mesons with the Bethe-Salpeter
  equation

abstract:
  In this article, we investigate the under-structures of the $\pi$ and B
mesons in the framework of the Bethe-Salpeter equation with the bare
quark-gluon vertex, bare quark propagator and the confining effective potential
(infrared modified flat bottom potential) firstly.
  Although the bare quark propagator can not embody dynamical chiral symmetry
breaking and has a mass pole in the time-like region, it can give reasonable
results for the values of decay constants $f_\pi$ and $f_B$ compared with the
values of experimental data and other theoretical calculations, such as lattice
simulations and QCD sum rules. Secondly, we explore those mesons within the
framework of the coupled rain-bow Schwinger-Dyson equation and ladder
Bethe-Salpeter equation. The Schwinger-Dyson functions for the $u$ and $d$
quarks are greatly renormalized at small momentum region and the curves are
steep which indicates an explicitly dynamical symmetry breaking. The Euclidean
time fourier transformed quark propagator has no mass poles in the time-like
region which naturally implements confinement. As for the $b$ quark, the
current mass is very large, the renormalization is more tender, however, mass
pole in the time-like region is also absent. The Bethe-Salpeter wavefunctions
for both the $\pi$ and B mesons have the same type (Gaussian type) momentum
dependence as the corresponding wavefunctions with the bare quark propagator,
however, the quantitative values are changed and the values for the decay
constants $f_\pi$ and $f_B$ are changed correspondingly.


title:
Beyond leading-order corrections to bar{B} -> X_s gamma at large tan
  beta: the charged-Higgs-boson contribution

abstract:
  Among the O(alpha_s tan beta) contributions to the Wilson coefficients C_7
and C_8, relevant for the decay bar{B} -> X_s gamma, those induced by two-loop
diagrams with charged-Higgs-boson exchange and squark-gluino corrections are
calculated in supersymmetric models at large tan beta. The calculation of the
corresponding Feynman integrals is exact, unlike in previous studies that are
valid when the typical supersymmetric scale M_SUSY is sufficiently larger than
the electroweak scale m_weak (\sim m_W, m_t) and the mass of the charged Higgs
boson m_{H^\pm}. Therefore, the results presented here can be used for any
value of the various supersymmetric masses. These results are compared with
those of an approximate calculation, already existing in the literature, that
is at the zeroth order in the expansion parameter (m_weak^2,m_H^2)/M_SUSY^2,
and with the results of two new approximate calculations in which the first and
second order in the same expansion parameter are retained, respectively. This
comparison allows us to assess whether the results of these three approximate
calculations can be extended beyond the range of validity for which they were
derived, i.e., whether they can be used for m_H^2 \gtap M_SUSY^2 and/or
M_SUSY^2 \sim m_weak^2. It is found that the zeroth-order approximation works
well even for m_H \gtap M_SUSY, provided M_SUSY^2 >> m_weak^2. The inclusion of
the higher-order terms improves the zeroth-order approximation for m_H^2 <<
M_SUSY^2, but it worsens it for m_H \gtap M_SUSY$.


title:
Analysis of transverse momentum distributions observed at RHIC by a
  stochastic model in hyperbolic space

abstract:
  To describe large momentum distributions of charged particles observed at
RHIC, a diffusion equation in the three dimensional hyperbolic space is
introduced.


title:
Triviality and stability limits on the Higgs boson mass in effective
  theories

abstract:
  The impact of new interactions on the triviality and stability Higgs-boson
mass bounds has been studied. The interactions have been parame- trized in a
model-independent way by a set of effective operators of dimension 6.
Constraints from electroweak observables at 1-loop level have been included. In
the analyzed region of scale of new physics $\La \simeq 2 \div 50 \tev$ the
classic triviality bound remains unchanged. An extension of the triviality
condition that has been introduced leads to strong constraints on the possible
models. The stability bound on the Higgs boson mass is substantially modified
depending on the scale $\La$ and strength of coefficients of relevant effective
operators.


title:
Chiral doublings of heavy-light hadrons: New charmed mesons discovered
  by BABAR,CLEO and BELLE

abstract:
  We remind the chiral doubling scenario [1,2] for hadrons built of heavy and
light quarks. Then we recall arguments why new states
D_s(2317),D_s(2460),D_0(2308) and D_1^'(2427) should be viewed as chiral
partners of D_s,D_s^*,D and D^*,respectively. We summarize with the list of
predictions based on chiral doubling scenario for other heavy-light hadrons.


title: Neutral Dense Quark Matter

abstract:
  The ground state of dense up and down quark matter under local and global
charge neutrality conditions with $\beta$-equilibrium has at least four
possibilities: normal, regular 2SC, gapless 2SC phases, and mixed phase
composed of 2SC phase and normal components. The discussion is focused on the
unusual properties of gapless 2SC phase at zero as well as at finite
temperature.


title:
Photon production from a thermalized quark gluon plasma: quantum
  kinetics and nonperturbative aspects

abstract:
  We study the production of photons from a quark gluon plasma in local thermal
equilibrium by introducing a non-perturbative formulation of the real time
evolution of the density matrix. The main ingredient is the real time effective
action for the electromagnetic field to $\mathcal{O}(\alpha_{em})$ and to all
orders in $\alpha_s$. The real time evolution is completely determined by the
solution of a \emph{classical stochastic} non-local Langevin equation which
provides a Dyson-like resummation of the perturbative expansion. The Langevin
equation is solved in closed form by Laplace transform in terms of the thermal
photon polarization. A quantum kinetic description emerges directly from this
formulation. We find that photons with $k \lesssim 200 ~{Mev}$
\emph{thermalize} as plasmon quasiparticles in the plasma on time scales $t
\sim 10-20 ~{fm}/c$ which is of the order of the lifetime of the QGP expected
at RHIC and LHC. We then obtain the direct photon yield to lowest order in
$\alpha_{em}$ and to leading logarithmic order in $\alpha_s$ in a
\emph{uniform} expansion valid at all time. The yield during a QGP lifetime $t
\sim 10 ~{fm}/c$ is systematically larger than that obtained with the
equilibrium formulation and the spectrum features a distinct flattening for $k
\gtrsim 2.5 ~{Gev}$. We discuss the window of reliability of our results, the
theoretical uncertainties in \emph{any} treatment of photon emission from a QGP
in LTE and the shortcomings of the customary S-matrix approach.


title: Improving Multiparton Monte Carlo Tools in Hadronic Collisions

abstract:
  Recent work on leading order multiparton calculations for hadronic collisions
is reviewed, with special emphasis on the ALPGEN event generator. Some problems
connected with the interface of the partonic events generated via matrix
elements with the showering are addressed.