title: Tau Neutrino Astronomy in GeV Energies

abstract:
  We point out the opportunity of the tau neutrino astronomy for the neutrino
energy E ranging between 10 GeV and 10^3 GeV. In this energy range, the
intrinsic tau neutrino production is suppressed relative to the intrinsic muon
neutrino production. Any sizable tau neutrino flux may thus arise because of
the \nu_{\mu}\to \nu_{\tau} neutrino oscillations only. It is demonstrated
that, in the presence of the neutrino oscillations, consideration of the
neutrino flavor dependence in the background atmospheric neutrino flux leads to
the drastically different prospects between the observation of the
astrophysical muon neutrinos and that of the astrophysical tau neutrinos.
  Taking the galactic-plane neutrino flux as the targeted astrophysical source,
we have found that the galactic-plane tau neutrino flux dominates over the
atmospheric tau neutrino flux for E > 10 GeV. Hence, the galactic-plane can at
least in principle be seen through the tau neutrinos with energies just greater
than 10 GeV. In a sharp contrast, the galactic-plane muon neutrino flux is
overwhelmed by its atmospheric background until E > 10^6 GeV.


title:
A Remark on A Remark on Neutrino Oscillations Observed in KamLAND
  Experiment

abstract:
  It is shown that equal magnitudes of the transitions $\bar \nu_e \to \bar
\nu_{\mu}$ and $\bar \nu_e \to \bar \nu_{\tau}$ in the disappearance of reactor
$\bar \nu_e$ discovered in the KamLAND experiment just follows at
$\theta_{23}=\pi/4$ and $\theta_{13}=0$ from pure symmetry of $\nu_{\mu}$ and
$\nu_{\tau}$ states relatively the mass states.


title:
Numerical consistency check between two approaches to radiative
  corrections for neutrino masses and mixings

abstract:
  We briefly outline the two popular approaches on radiative corrections to
neutrino masses and mixing angles, and then carry out a detailed numerical
analysis for a consistency check between them in MSSM. We find that the two
approaches are nearly consistent with a small discrepancy of a factor of 13
percent in mass eigenvalues at low energy scale, but the predictions on mixing
angles are almost consistent. We check the stability of the three types of
neutrino models, i.e., hierarchical, inverted hierarchical and degenerate
models, under radiative corrections, using both approaches, and find consistent
conclusions. The neutrino mass models which are found to be stable under
radiative corrections in MSSM are the normal hierarchical model and the
inverted hierarchical model with opposite CP parity. We also carry out
numerical analysis on some important conjectures related to radiative
corrections in MSSM, viz., radiative magnification of solar and atmospheric
mixings in case of nearly degenerate model having same CP parity (MPR
conjecture) and radiative generation of solar mass scale in exactly two-fold
degenerate model with opposite CP parity and non-zero reactor angle (JM
conjecture). We observe certain exceptions to these conjectures. Finally the
effect of scale-dependent vacuum expectation value in neutrino mass
renormalisation is discussed.


title: Masses of light mesons and analytical confinement

abstract:
  Spectrum of masses of light pseudoscalar ($\pi, K, \eta, \eta'$) and vector
($\rho, K^*, \omega, \phi$) mesons can be explained on the base of the
following assumptions: (1) analytical confinement (propagators of quarks and
gluons are entire analytical functions of the Gaussian type), (2) mesons are
bound states of quark and gluons (the Bethe-Salpeter equation in the one-gluon
exchange approximation) and (3) QCD coupling constant $\alpha_s(M)$ is a
monotone decreasing function of mass of a bound state $M$. The decay constants
$f_\pi$ and $f_K$ are calculated.


title: Rise and Fall of the Bottom Quark Production Excess

abstract:
  We review the history of comparisons between bottom production measurements
and QCD predictions. We challenge the existence of a `significant discrepancy',
and argue that standard approaches to QCD calculations do a good job in
describing the experimental findings.


title:
On possible $S$-wave bound states for a $N \bar N$ system within a
  constituent quark model

abstract:
  We try to apply a constituent quark model (a variety chiral constituent quark
model) and the resonating group approach for the multi-quark problems to
compute the effective potential between the $N\bar{N}$ in $S$-wave (the quarks
in the nucleons $N$ and $\bar{N}$, and the two nucleons relatively as well, are
in $S$ wave) so as to see the possibility if there may be a tight bound state
of six quarks as indicated by a strong enhancement at threshold of $p\bar{p}$
in $J/\psi$ and B decays. The effective potential which we obtain in terms of
the model and approach shows if the experimental enhancement is really caused
by a tight $S$-wave bound state of six quarks, then the quantum number of the
bound state is very likely to be $I=1, J^{PC}=0^{-+}$.


title: Oscillations of neutrinos produced by a beam of electrons

abstract:
  We analyze a thought neutrino oscillation experiment in which neutrinos are
produced by electrons colliding with atomic nuclei of a target. The neutrinos
are detected by observing charged leptons, which are produced by neutrinos
colliding with nuclei of the detector. We consider the case when both the
target and detector nuclei have finite masses. (The case of infinitely heavy
nuclei was considered in the literature earlier.)


title: Determination of Higgs-boson couplings at the LHC

abstract:
  We investigate the determination of Higgs boson couplings to gauge bosons and
fermions at the LHC from data on Higgs boson production and decay. We
demonstrate that very mild theoretical assumptions, which are valid in general
multi-Higgs doublet models, are sufficient to allow the extraction of absolute
values of the couplings rather than just ratios of the couplings. For Higgs
masses below 200 GeV we find accuracies of 10-40% for the Higgs couplings and
the total Higgs boson width after several years of LHC running. The sensitivity
of the Higgs coupling measurements to deviations from the Standard Model
predictions is studied for an MSSM scenario.


title:
Vector meson dominance pion electromagnetic form factor with the
  sigma-model loop corrections

abstract:
  A model is developed for electromagnetic form factor of the pion. One-loop
corrections are included in the linear sigma-model. The rho-meson contribution
is added in an extended VMD model. The form factor, calculated without fitting
parameters, is in a good agreement with experiment for space-like and time-like
photon momenta. Loop corrections to the two-pion hadronic contribution a^{(had,
\pi)}_\mu to the muon anomalous magnetic moment are calculated. The optimal
value of the sigma-meson mass appears to be close to the rho-meson mass.


title: Possible Chandra-Mechanism for Generation Bound

abstract:
  In the generation structure, the quark mass increases extremely rapidly with
the increase of generation index, and there is the bound for generation number.
The ground for this bound is investigated on the basis of a certain kind of
composite model of leptons and quarks, in which they are supposed to be
composed of sub-constituents with fermi statistics. Possible Chandrasekhar-like
mechanism for generation bound is proposed.


title:
Central inclusive dijets production by double pomeron exchange.
  Comparison with the CDF results

abstract:
  Using the Landshoff-Nachtmann model of the pomeron, rapidity and transverse
momentum distributions of gluon jets produced by double pomeron exchange in pp
collisions are calculated. The comparison with the CDF Run I results on the
central inclusive dijets production cross sections is performed. We find the
model to give correct order of magnitude for the measured cross sections.


title: Avoiding BBN Constraints on Mirror Models for Sterile Neutrinos

abstract:
  We point out that in models that explain the LSND result for neutrino
oscillation using the mirror neutrinos, the big bang nucleosynthesis constraint
can be avoided by using the late time phase transition that only helps to mix
the active and the sterile neutrinos. We discuss the astrophysical as well as
cosmological implications of this proposal.


title:
Numerical precision radiative corrections to the Dalitz plot of baryon
  semileptonic decays including the spin-momentum correlation of the decaying
  and emitted baryons

abstract:
  We calculate the radiative corrections to the angular correlation between the
polarization of the decaying and the direction of the emitted spin one-half
baryons in the semileptonic decay mode. The final results are presented, first,
with the triple integration of the bremsstrahlung photon ready to be performed
numerically and, second, in an analytical form. A third presentation of our
results in the form of numerical arrays of coefficients to be multiplied by the
quadratic products of form factors is discussed. This latter may be the most
practical one to use in Monte Carlo simulations. A series of crosschecks is
performed. Previous results to order (alpha/pi)(q/M_1) for the decays of
unpolarized baryons are reviewed, too, where q is the momentum transfer and M_1
is the mass of the decaying baryon. This paper is self-contained and organized
to make it accessible and reliable in the analysis of the Dalitz plot of
precision experiments involving heavy quarks and is not compromised to fixing
the form factors at predetermined values. It is assumed that the real photons
are kinematically discriminated. Otherwise, our results have a general
model-independent applicability.


title: Dimensionless Coupling of Bulk Scalars at the LHC

abstract:
  We identify the lowest-dimension interaction which is possible between
Standard Model brane fields and bulk scalars in 6 dimensions. The
lowest-dimension interaction is unique and involves a trilinear coupling
between the Standard Model Higgs and the bulk scalar. Because this interaction
has a dimensionless coupling, it depends only logarithmically on ultraviolet
mass scales and heavy physics need not decouple from it. We compute its
influence on Higgs physics at ATLAS and identify how large a coupling can be
detected at the LHC. Besides providing a potentially interesting signal in
Higgs searches, such couplings provide a major observational constraint on 6D
large-extra-dimensional models with scalars in the bulk.


title: There is no local chiral perturbation theory at finite temperature

abstract:
  For a low-temperature expansion in QCD it is well-known that the Lagrangian
of vacuum chiral perturbation theory can be applied. This is due to the fact
that the thermal effects of the heavy modes are Boltzmann suppressed. The
present work is concerned with the situation of higher temperatures, but still
below the chiral transition. For a systematic approach it would be desirable to
have a temperature modified chiral perturbation theory at hand which would
yield a chiral power counting scheme. It is shown that this cannot be obtained.
In principle, chiral perturbation theory emerges from QCD by (a) integrating
out all degrees of freedom besides the Goldstone bosons and (b) expanding the
obtained non-local action in terms of derivatives. It is shown that at finite
temperature step (b) cannot be carried out due to non-analyticities appearing
for vanishing four-momenta. Therefore one cannot obtain a local Lagrangian for
the Goldstone boson fields with temperature modified coupling constants. The
importance of the non-analyticities is estimated.


title: A Review of Rare Pion and Muon Decays

abstract:
  After a decade of no measurements of pion and muon rare decays, PIBETA, a new
experimental program is producing its first results. We report on a new
experimental study of the pion beta decay, Pi(+) -> Pi(0) e(+) Nu, the Pi(e2
gamma) radiative decay, Pi(+) -> e(+) Nu Gamma, and muon radiative decay, Mu ->
e Nu Gamma. The new results represent four- to six-fold improvements in
precision over the previous measurements. Excellent agreement with Standard
Model predictions is observed in all channels except for one kinematic region
of the Pi(e2 gamma) radiative decay involving energetic photons and
lower-energy positrons.


title: Gluon condensate in charmonium sum rules for the axial-vector current

abstract:
  The charmonium sum rules for the axial-vector current are considered. The
three-loop perturbative corrections, operators up to 8 dimension and
perturbative corrections to the lowest dimension operator are accounted. The
contribution of the operators of 6 and 8 dimensions is computed in the
framework of factorization hypothesis and instanton model. For the value of
gluon condensate the following result is obtained: (0.005+0.001-0.004)GeV^4
(for the charm quark mass 1.275 GeV).


title: Lorentz-noninvariant neutrino oscillations: model and predictions

abstract:
  We present a three-parameter neutrino-oscillation model for three flavors of
massless neutrinos with Fermi-point splitting and tri-maximal mixing angles.
One of these parameters is the T-violating phase \epsilon, for which the
experimental results from K2K and KamLAND appear to favor a nonzero value. In
this article, we give further model predictions for neutrino oscillations.
Upcoming experiments will be able to test this simple model and the general
idea of Fermi-point splitting. Possible implications for proposed experiments
and neutrino factories are also discussed.


title: Observations on dA scattering at forward rapidities

abstract:
  We point out that the suppression in the ratio R_dAu recently observed by the
BRAHMS collaboration in forward scattering is stronger than usually
appreciated. This is related to the fact that at forward rapidities BRAHMS
measures negatively charged hadrons and that R_dAu is defined from the ratio of
dA and pp scattering cross sections. We also investigate the influence of
standard shadowing on R_dAu, and the typical values of partonic momentum
fractions relevant in forward scattering. We find that x_Au > 0.02 dominate in
the cross section.


title: Sum rules for spin asymmetries

abstract:
  Starting from rotational invariance we derive sum rules for the single-spin
asymmetries in inclusive production and binary processes. We also get sum rules
for spin correlation parameters in elastic pp-scattering.


title: Radiative Corrections to Neutrino Deep Inelastic Scattering Revisited

abstract:
  Radiative corrections to neutrino deep inelastic scattering are revisited.
One-loop electroweak corrections are re-calculated within the automatic SANC
system. Terms with mass singularities are treated including higher order
leading logarithmic corrections. Scheme dependence of corrections due to weak
interactions is investigated. The results are implemented into the data
analysis of the NOMAD experiment. The present theoretical accuracy in
description of the process is discussed.


title: Beyond the Standard Model: Expectations at the LHC

abstract:
  In this talk, I review the main motivations for expecting new physics at the
TeV energy scale, that will be explorable at the CERN Large Hadron Collider.


title:
Charmless $B \to PP $ decays and the new physics effects in the minimal
  supergravity model

abstract:
  By employing the QCD factorization approach, we calculate the new physics
contributions to the branching radios of the two-body charmless $ B \to PP$
decays in the framework of the minimal supergravity (mSUGRA) model. Within the
considered parameter space, we find that (a) the supersymmetric (SUSY)
corrections to the Wilson coefficients $C_k$ ($k=3-6$) are very small and can
be neglected safely, but the leading order SUSY contributions to
$C_{7\gamma}(M_W)$ and $C_{8g}(M_W)$ can be rather large and even change the
sign of the corresponding coefficients in the standard model; (b) the possible
SUSY contributions to those penguin-dominated decays in mSUGRA model can be as
large as $30-50%$; (c) for the well measured $B \to K \pi$ decays, the
significant SUSY contributions play an important rule to improve the
consistency of the theoretical predictions with the data; (d) for $B \to K
\eta'$ decays, the theoretical predictions of the corresponding branching
ratios become consistent with the data within one standard deviation after the
inclusion of the large SUSY contributions in the mSUGRA model.


title:
Radiative generation of $\bigtriangleup m^2_{21}$ and $\theta_{13}$ in
  two-fold degenerate neutrino models

abstract:
  We study the implications on an important result on radiative corrections (JM
conjecture) which states that the solar mass scale $\bigtriangleup m^2_{21}$
corresponding to the large mixing angle (LMA) MSW solution of the solar
neutrino problem, can be generated through radiative corrections in the minimal
supersymmetric standard model (MSSM) if two of the neutrino masses having
opposite CP parity, are assumed to be degenerate and have non-zero value of
$U_{e3}$ at high energy scale. We show that the above conjecture can be derived
when we take the static solution of mixing angles from the general solution of
RGEs. If we consider the simultaneous running of the three neutrino mass
eigenvalues and mixing angles, the above two-fold degenerate case $m_i=(m, -m,
m')$ with $m'\neq 0$ and $U_{e3}=0$, can also generate through radiative
corrections, the non-zero values of $\bigtriangleup m^2_{21}$ and $U_{e3}$ at
low scale, which are consistent with the LMA MSW solution. Such generalisation
of JM conjecture may have important implications for model buildings from
general gauge symmetry.


title: Vector meson electroproduction at next-to-leading order

abstract:
  The process of a light neutral vector meson electroproduction is studied in
the framework of QCD factorization in which the amplitude factorizes in a
convolution of the nonperturbative meson distribution amplitude and the
generalized parton densities with the perturbatively calculable hard-scattering
amplitudes. We derive a complete set of hard-scattering amplitudes at
next-to-leading order for the production of vector mesons, $V=\rho^0, \omega,
\phi$.


title: Q^2 Dependence of the azimuthal Asymmetry in Unpolarized Drell-Yan

abstract:
  We study the azimuthal asymmetry of the unpolarized Drell-Yan in the
framework of the T-odd functions. We find, on the basis of quite general
arguments, that for |{\bf q}_{\perp}| << Q such an asymmetry decreases as
Q^{-2}, where {\bf q}_{\perp} and Q are respectively the transverse momentum
and the center-of-mass energy of the muon pair. The experimental results
support this conclusion.


title:
The Neutralino Sector of the Next-to-Minimal Supersymmetric Standard
  Model

abstract:
  The Next-to-Minimal Supersymmetric Standard Model (NMSSM) includes a Higgs
iso-singlet superfield in addition to the two Higgs doublet superfields of the
minimal extension. If the Higgs fields remain weakly coupled up to the GUT
scale, as naturally motivated by the concept of supersymmetry, the mixing
between singlet and doublet fields is small and can be treated perturbatively.
The mass spectrum and mixing matrix of the neutralino sector can be analyzed
analytically and the structure of this 5-state system is under good theoretical
control. We also determine decay modes and production channels in sfermion
cascade decays to these particles at the LHC and pair production in e+e-
colliders.


title:
Magnetic properties of the Larkin-Ovchinnikov-Fulde-Ferrell
  superconducting phase

abstract:
  We compute, at the first order in the fine structure constant, the parameters
of the electromagnetic Lagrangian for the inhomogeneous
Larkin-Ovchinnikov-Fulde-Ferrell phase in Quantum Chromodynamics (QCD) and in
condensed matter. In particular we compute for QCD with two flavors the
dielectric and the magnetic permeability tensors, and for condensed matter
superconductors the penetration depth of external magnetic fields.


title: Partial wave decomposition of pion and photoproduction amplitudes

abstract:
  Partial wave amplitudes for production and decay of baryon resonances are
constructed in the framework of the operator expansion method. The approach is
fully relativistically invariant and allow us to perform combined analyses of
different reactions imposing directly analyticity and unitarity constraints.
All formulas are given explicitly in the form used by the Crystal Barrel
collaboration in the (partly forthcoming) analyses of the electro-, photo- and
pion induced meson production data.


title: Interpretation of D$_{sJ}^*$(2317) and D$_{sJ}$(2460)

abstract:
  The experimental status of the recently observed resonances which could be
interpreted as c$\bar q$ mesons with s$_l^P={1/2}^+$ is reviewed. In the
framework of HQET and chiral perturbation theory, strong and radiative widths
of these states are computed in the hypothesis that they are c$\bar q$ states,
obtaining results consistent with the experimental measurements. Masses and
widths for the analogous states containing a beauty quark are also predicted.


title: Regge description of high energy pion pion total cross sections

abstract:
  We have recently presented a Regge description of pion-pion total cross
sections valid above 1.4 GeV, consistent with the few existing experiments,
factorization and crossing symmetry. In this note we show how it also describes
a further large data sample obtained from an analysis of experiments on
$\pi^\pm p\to X\Delta^{++}$ and $\pi^\pm n\to Xp$.


title:
Deterministic Annealing as a jet clustering algorithm in hadronic
  collisions

abstract:
  We show that a general purpose clusterization algorithm, Deterministic
Annealing, can be adapted to the problem of jet identification in particle
production by high energy collisions. In particular we consider the problem of
jet searching in events generated at hadronic colliders. Deterministic
Annealing is able to reproduce the results obtained by traditional jet
algorithms and to exhibit a higher degree of flexibility.


title: Two- and three-body color flux tubes in the Chromo Dielectric Model

abstract:
  Using the framework of the Chromo Dielectric Model we perform an analysis of
color electric flux tubes in meson-like $q\bar{q}$ and baryon-like $qqq$ quark
configurations. We discuss the Abelian color structure of the model and point
out a symmetry in color space as a remnant of the SU(3) symmetry of QCD. The
generic features of the model are discussed by varying the model parameters. We
fix these parameters by reproducing the string tension $\tau=980 $MeV/fm and
the transverse width $\rho=0.35 $fm of the $q\bar{q}$ flux tube obtained in
lattice calculations. We use a bag constant $B^{1/4}=(240-260) $MeV, a glueball
mass $m_g = (1000-1700) $MeV and a strong coupling constant $C_F \alpha_s =
0.2-0.3$. We show that the asymptotic string profile of an infinitely long flux
tube is already reached for $q\bar{q}$ separations $R\ge1.0 $fm. A connection
to the Dual Color Superconductor is made by extracting a magnetic current from
the model equations and a qualitative agreement between the two descriptions of
confinement is shown. In the study of the $qqq$ system we observe a
$\mathsf{\Delta}$-like geometry for the color electric fields and a
\textsf{Y}-like geometry in the scalar fields both in the energy density
distribution and in the corresponding potentials. The resulting total $qqq$
potential is described neither by the $\mathsf{\Delta}$-picture nor by the
\textsf{Y}-picture alone.


title: K -> pi nu nubar from standard to new physics

abstract:
  Flavour changing neutral current decays are a very sensitive test of the
standard model and its extensions. In particular the decay K -> pi nu nubar
constitutes a clean way to provide constraints, independent of long distance
effects. Motivated by the recent experimental data of the E787 and E865
collaborations and by the difference between the standard model prediction and
data, we consider in detail new physics scenarios such as the minimal
supersymmetric standard model and R-parity violating supersymmetry. We begin
with analysing the impact of new measurements on the standard model result
obtaining B(K^+ -> pi^+ nu nubar)=(8.18 +/- 1.22) x 10^(-11). Predictions for
other rare kaon decays are discussed, too. Our results allow to improve the
limits on R-parity violating couplings with respect to previous analyses.


title:
Forward-backward asymmetries in (Lambda_b -> Lambda l^+ l^-) decay
  beyond the standard model

abstract:
  We study the doubly-polarized lepton pair forward-backward asymmetries in
(Lambda_b -> Lambda l^+ l^-) decay using a general, model independent form of
the effective Hamiltonian. We present the general expression for nine
double-polarization forward-backward asymmetries. It is observed that, the
study of the forward-backward asymmetries of the doubly-polarized lepton pair
is a very useful tool for establishing new physics beyond the standard model.
Moreover, the correlation between forward-backward asymmetry and branching
ratio is investigated. It is shown that there exist certain certain regions of
the new Wilson coefficients where new physics can be established by measuring
the polarized forward-backward asymmetry only.


title:
WMAP constraints on SUGRA models with non-universal gaugino masses and
  prospects for direct detection

abstract:
  We discuss constraints on supersymmetric models arising from the relic
density measurements of WMAP as well as from direct and precision measurements,
LEP, b-sgamma, g-2, Bs-mumu. We consider mSUGRA models and their extensions
with non-universal gaugino masses. We find, as commonly known, that the relic
density pinpoints towards very specific regions of the mSUGRA models:
coannihilation, focus and Heavy Higgs annihilation. The allowed regions widen
significantly when varying the top quark mass. Introducing some
non-universality in the gaugino masses significantly changes this conclusion as
in specific non-universal models the relic density upper limit can be easily
satisfied. This occurs with models where M1>M2 at the GUT scale when the LSP
has a high wino component. Models where M3<M2 favours the Higgs annihilation
channel in large regions of parameter space and at large $\tan\beta$ also
favours the annihilation of neutralinos in gauge bosons pairs.We discuss also
the potential of direct detection experiments to probe supersymmetric models
and point out at the main consequences for colliders based on the mass
spectrum. Our calculation of the relic density of neutralinos is based on
micrOMEGAs and the SUSY spectrum is generated with SoftSUSY


title: Exotic superfluids: Breached Pairing, Mixed Phases and Stability

abstract:
  We review properties of gapless states. We construct a model where a stable
breached pair (gapless) state is realized.


title: Neutrino Masses: Shedding Light on Unification and Our Origin

abstract:
  In the first part of the talk, three key ideas proposed in the 1970s, and in
particular their combined role in providing an understanding of the
neutrino-masses as well as of the baryon-asymmetry of the universe, are
expounded. The ideas in question include: (i) The symmetry SU(4)-color, which
introduces the right-handed neutrino as an essential member of each family and
also provides (rather reliably) the Dirac mass of the tau-neutrino by relating
it to the top quark mass; (ii) SUSY grand unification together with the scale
of the meeting of the three gauge couplings, which provides the scale for the
superheavy Majorana masses of the RH neutrinos; and (iii) the seesaw mechanism,
which combines the Dirac and the superheavy Majorana masses of the neutrinos
obtained as above to yield naturally light LH neutrinos and in particular the
right magnitude for m(nu-tau). In the second part, an attempt is made, based in
part on recent works, to show how a set of diverse phenomena including (a)
fermion masses, (b) neutrino oscillations, (c) CP and flavor violations, and
(d) baryogenesis via leptogenesis can fit together neatly within a single
predictive framework based on an effective symmetry group G(224) = SU(2)_L x
SU(2)_R x SU(4)-color or SO(10), possessing supersymmetry. CP and flavor
violations arising within this framework include enhanced rates (often close to
observed limits) for mu -> e + gamma and tau -> mu + gamma and also measurable
electric dipole moments of the neutron and the electron. Expectations arising
within the same framework for proton decay are summarized at the end. It is
stressed that the two notable missing pieces of this framework, which is
otherwise so successful, are supersymmetry and proton decay.


title: Heavy Quarks on the Lattice

abstract:
  Lattice quantum chromodynamics provides first principles calculations for
hadrons containing heavy quarks -- charm and bottom quarks. Their mass spectra,
decay rates, and some hadronic matrix elements can be calculated on the lattice
in a model independent manner. In this review, we introduce the effective
theories that treat heavy quarks on the lattice. We summarize results on the
heavy quarkonium spectrum, which verify the validity of the effective theory
approach. We then discuss applications to $B$ physics, which is the main target
of the lattice theory of heavy quarks. We review progress in lattice
calculations of the $B$ meson decay constant, the $B$ parameter, semi-leptonic
decay form factors, and other important quantities.)


title: Decisive test for the Pomeron at Tevatron

abstract:
  We propose a new measurement to be performed at the Tevatron which can be
decisive to distinguish between Pomeron-based and soft color interaction models
of hard diffractive scattering.


title: New-Physics scenarios in $\Delta S = 2$ decays of the B_c meson

abstract:
  The $\Delta S = 2$ transition $b \to s s \bar d$ is extremely small in the
standard model, proceeding only via box diagrams. Such decays are thus an
appropriate ground for searching new physics. We present a study of several
two-body and three-body decays of the B_c meson belonging to this class. Our
calculation covers the minimal supersymmetric model with and without R-parity
and a two-Higgs-doublet model. The current limits on the parameters of these
models allow for rather large branching ratios for several two and three-body
hadronic decay modes of B_c, up to the 10^{-4} range in the minimal
supersymmetric model with R-parity violation.


title: Optimal observables and phase-space ambiguities

abstract:
  Optimal observables are known to lead to minimal statistical errors on
parameters for a given normalised event distribution of a physics reaction.
Thereby all statistical correlations are taken into account. Therefore, on the
one hand they are a useful tool to extract values on a set of parameters from
measured data. On the other hand one can calculate the minimal constraints on
these parameters achievable by any data-analysis method for the specific
reaction. In case the final states can be reconstructed without ambiguities
optimal observables have a particularly simple form. We give explicit formulae
for the optimal observables for generic reactions in case of ambiguities in the
reconstruction of the final state and for general parameterisation of the
final-state phase space.


title: A model for next-to-leading order threshold resummed form factors

abstract:
  We present a model for next-to-leading order resummed threshold form factors
based on a time-like coupling recently introduced in the framework of small x
physics. Improved expressions for the form factors in N-space are obtained
which are not plagued by Landau-pole singularities, as the included absorptive
effects -- usually neglected -- act as regulators. The physical reason is that,
because of faster decay of gluon jets, there is not enough resolution time to
observe the Landau pole. Our form factors reduce to the standard ones when the
absorptive parts related to the coupling are neglected. The inverse transform
from N-space to x-space can be done directly without any prescription and we
obtain analytical expressions for the form factors, which are well defined in
all x-space.


title: Kaon Distribution Amplitude from QCD Sum Rules

abstract:
  We present a new calculation of the first Gegenbauer moment $a_1^K$ of the
kaon light-cone distribution amplitude. This moment is determined by the
difference between the average momenta of strange and nonstrange valence quarks
in the kaon. To calculate $a_1^K$, QCD sum rule for the diagonal correlation
function of local and nonlocal axial-vector currents is used. Contributions of
condensates up to dimension six are taken into account, including
$O(\alpha_s)$-corrections to the quark-condensate term. We obtain
$a_1^K=0.05\pm 0.02$, differing by the sign and magnitude from the recent
sum-rule estimate from the nondiagonal correlation function of pseudoscalar and
axial-vector currents. We argue that the nondiagonal sum rule is numerically
not reliable. Furthermore, an independent indication for a positive $a_1^K$ is
given, based on the matching of two different light-cone sum rules for the
$K\to\pi$ form factor. With the new interval of $a_1^K$ we update our previous
numerical predictions for SU(3)-violating effects in $B_{(s)}\to K$ form
factors and charmless (B) decays.


title: Non-perturbative tests of Heavy Quark Effective Theory

abstract:
  We consider QCD with one massless quark and one heavy quark in a finite
volume of linear extent L_0 ~ 0.2 fm. In this situation, HQET represents an
expansion in terms of 1/z=1/(m L_0), which we test by a non-perturbative
computation of quenched current matrix elements and energies, taking the
continuum limit of lattice results. These are seen to approach the
corresponding renormalization group invariant matrix elements of the static
effective theory as the quark mass becomes large. We are able to obtain
estimates of the size of the 1/m-corrections to the static theory, which are
also of practical relevance in our recent strategy to implement HQET
non-perturbatively by matching to QCD in a finite volume.


title:
Nonperturbative versus perturbative effects in generalized parton
  distributions

abstract:
  Generalized parton distributions (GPDs) are studied at the hadronic
(nonperturbative) scale within different assumptions based on a relativistic
constituent quark model. In particular, by means of a meson-cloud model we
investigate the role of nonperturbative antiquark degrees of freedom and the
valence quark contribution. A QCD evolution of the obtained GPDs is used to add
perturbative effects and to investigate the GPDs' sensitivity to the
nonperturbative ingredients of the calculation at larger (experimental) scale.


title:
Unquenched Lattice Gauge Theory Calculations for Semileptonic B, D
  Decays

abstract:
  This paper reviews recent progress of lattice gauge theory determinations of
semileptonic B and D decay form factors. These determinations are important in
extracting the remaining CKM matrix elements.


title: Enhanced reheating via Bose condensates

abstract:
  In supersymmetric extensions of the particle physics Standard Model, gauge
invariant combinations of squarks and sleptons (flat directions) can acquire
large expectation values during a period of cosmological inflation. If the
inflaton sector couples to matter fields via these flat directions, then new
channels for efficient reheating, in particular via parametric resonance
instabilities, are opened up. These can lead to efficient reheating induced by
the flat directions even if the bare coupling constants are small. In this
Letter we discuss various channels which yield this ``enhanced reheating''
effect, and we address some cosmological consequences.


title: Relaxing Cosmological Constraints on Large Extra Dimensions

abstract:
  We reconsider cosmological constraints on extra dimension theories from the
excess production of Kaluza-Klein gravitons. We point out that, if the normalcy
temperature is above 1 GeV, then graviton states produced at this temperature
will decay early enough that they do not affect the present day dark matter
density, or the diffuse gamma ray background. We rederive the relevant
cosmological constraints for this scenario.


title: Improved Test of Lorentz Invariance in Electrodynamics

abstract:
  We report new results of a test of Lorentz invariance based on the comparison
of a cryogenic sapphire microwave resonator and a hydrogen maser. The
experimental results are shown together with an extensive analysis of
systematic effects. Previously, this experiment has set the most stringent
constraint on Kennedy-Thorndike type violations of Lorentz invariance. In this
work we present new data and interpret our results in the general Lorentz
violating extension of the standard model of particle physics (SME). Within the
photon sector of the SME, our experiment is sensitive to seven SME parameters.
We marginally improve present limits on four of these, and by a factor 7 to 10
on the other three.


title: Nonperturbative solution of Yukawa theory and gauge theories

abstract:
  Recent progress in the nonperturbative solution of (3+1)-dimensional Yukawa
theory and quantum electrodynamics (QED) and (1+1)-dimensional super Yang-Mills
(SYM) theory will be summarized. The work on Yukawa theory has been extended to
include two-boson contributions to the dressed fermion state and has inspired
similar work on QED, where Feynman gauge has been found surprisingly
convenient. In both cases, the theories are regulated in the ultraviolet by the
inclusion of Pauli-Villars particles. For SYM theory, new high-resolution
calculations of spectra have been used to obtain thermodynamic functions and
improved results for a stress-energy correlator.


title: Hidden symmetries and their implications for Particle Physics

abstract:
  In this thesis, we study the hidden symmetries in the SM and also use
discrete gauge symmetries as model building tools to solve various problems in
the SM as well as the MSSM, such as R-parity, mu-term, stabilizing the axion
solutions, etc. The flavor independent non-supersymmetric SM at the
renormalizable level has a discrete Z_3 gauge symmetry known as baryon parity.
It is anomaly free at the discrete level as a result of the existence of three
generations. The symmetry can effectively act as the Baryon number up to the
\Delta B=3 mod 3 level which is also consistent with the prediction from
non-perturbative processes corrections in the SM, such as electroweak instanton
and sphaleron processes. This symmetry is not consistent with the simple GUTs
since those theories explicitly break it. Thus this baryon parity provides a
strong hint for new physics like GUTs. Quantum mechanically, we estimate the
triple nucleon decay rate which is predicted by the existence of this symmetry.
We find a simple U(1) realization with the presence of right-handed neutrinos,
from which this baryon parity can naturally emerge. Gauged R-parity is studied
in the following chapter. We also study various different approaches to the
mu-term problem via a symmetry classification. One explicit example in terms of
a Z_4 subgroup of the anomalous U(1) symmetry is given. Another solution arises
from a SUSY version of QCD invisible axion. Discrete flavor gauge symmetries
are discussed to explain the observed hierarchy fermion masses. D-term
splitting problem can then be avoided. In the last part, we show how to use
discrete gauge symmetries to stabilize the QCD invisible axion solutions, for
both DFSZ and KSVZ invisible axion models.


title: A brane world cosmological solution to the gravitino problem

abstract:
  We investigate the thermal production of gravitinos in the context of the
brane world cosmology. Since the expansion law is modified from the one in the
standard cosmology, the Boltzmann equation for the gravitino production is
altered. We find that the late-time gravitino abundance is proportional to the
``transition temperature'', at which the modified expansion law in the brane
world cosmology is connecting with the standard one, rather than the reheating
temperature after inflation as in the standard cosmology. This means that, even
though the reheating temperature is very high, we can avoid the overproduction
of gravitinos by taking the transition temperature low enough. Therefore, the
gravitino problem can be solved.


title: Finite SU(N)^k Unification

abstract:
  We consider N=1 supersymmetric gauge theories based on the group SU(N)_1 x
SU(N)_2 x ... x SU(N)_k with matter content (N,N*,1,...,1) + (1,N,N*,...,1) +
>... + (N*,1,1,...,N) as candidates for the unification symmetry of all
particles. In particular we examine to which extent such theories can become
finite and we find that a necessary condition is that there should be exactly
three families. We discuss further some phenomenological issues related to the
cases (N,k) = (3,3), (3,4), and (4,3), in an attempt to choose those theories
that can become also realistic. Thus we are naturally led to consider the
SU(3)^3 model which we first promote to an all-loop finite theory and then we
study its additional predictions concerning the top quark mass, Higgs mass and
supersymmetric spectrum.


title: Anaysis of high energy K+K- photoproduction on hydrogen

abstract:
  We have analyzed the K+K- photoproduction on hydrogen in the effective mass
region around the mass of the phi(1020) meson. The interference of the S-wave
contribution with the P-wave has been studied. Both scalar resonances f0(980)
and a0(980) have been taken into account. We have obtained a good description
of the available experimental data, in particular the mass distributions and
the moments of the kaon angular distribution. Our calculations give values of
the integrated S-wave total photoproduction cross section between 4 and 7 nb
for the K+K- effective mass range around the phi(1020) mass and at the
laboratory photon energy near 5 GeV. These numbers favor lower experimental
estimates obtained at DESY.


title: One loop MSbar gluon pole mass from the LCO formalism

abstract:
  We compute the one loop corrections to the pole mass of the gluon in the
MSbar scheme in the Landau gauge in both the Curci-Ferrari model and the local
composite operator formalism with Nf flavours of massless quarks. For the
latter we determine an estimate for the gluon mass using the effective
potential of a local dimension two composite operator and find, for example,
m_{gluon} = 2.10 Lambda_MSbar in Yang-Mills theory.


title: Universality of the rho-meson coupling in effective field theory

abstract:
  It is shown that both the universal coupling of the rho-meson and the
Kawarabayashi-Suzuki-Riadzuddin-Fayyazuddin expression for the magnitude of its
coupling constant follow from the requirement that chiral perturbation theory
of pions, nucleons, and rho-mesons is a consistent effective field theory. The
prerequisite of the derivation is that all ultraviolet divergences can be
absorbed in the redefinition of fields and the available parameters of the most
general effective Lagrangian.


title: Quantum Loops in the Resonance Chiral Theory: The Vector Form Factor

abstract:
  We present a calculation of the Vector Form Factor at the next-to-leading
order in the 1/N_C expansion, within the framework of Resonance Chiral Theory.
The calculation is performed in the chiral limit, and with two dynamical quark
flavours. The ultraviolet behaviour of quantum loops involving virtual
resonance propagators is analyzed, together with the kind of counterterms
needed in the renormalization procedure. Using the lowest-order equations of
motion, we show that only a few combinations of local couplings appear in the
final result. The low-energy limit of our calculation reproduces the standard
Chiral Perturbation Theory formula, allowing us to determine the resonance
contribution to the chiral low-energy couplings, at the next-to-leading order
in 1/N_C, keeping a full control of their renormalization scale dependence.


title: The back-to-back region in e^+e^- energy--energy correlation

abstract:
  We consider the back-to-back region in the energy--energy correlation in
e^+e^- collisions. We present the explicit expression of the O(as^2)
logarithmically enhanced contributions up to next-to-next-to-leading
logarithmic accuracy. We study the impact of the results in a detailed
comparison with precise LEP and SLC data. We find that, when hadronization
effects are taken into account as is customarily done in QCD analysis in e^+e^-
annihilations, the extracted value of as(M_Z) is in good agreement with the
current world average.


title:
Electroweak symmetry breaking in supersymmetric models with heavy scalar
  superpartners

abstract:
  We propose a novel mechanism of electroweak symmetry breaking in
supersymmetric models, as the one recently discussed by Birkedal, Chacko and
Gaillard, in which the Standard Model Higgs doublet is a pseudo-Goldstone boson
of some global symmetry. The Higgs mass parameter is generated at one loop
level by two different, moderately fine-tuned sources of the global symmetry
breaking. The mechanism works for scalar superpartner masses of order 10 TeV,
but gauginos can be light. The scale at which supersymmetry breaking is
mediated to the visible sector has to be low, of order 100 TeV. Fine-tuning in
the scalar potential is at least two orders of magnitude smaller than in the
MSSM with similar soft scalar masses. The physical Higgs boson mass is (for
$\tan\beta\gg1$) in the range 120-135 GeV.


title: Neutrino proton elastic scattering and the spin structure of the proton

abstract:
  Neutrino proton elastic scattering and polarized deep inelastic spin sum
rules provide complementary information about the spin structure of the proton.
We outline the two approaches and what they may teach us about the transition
from current to constituent quarks in QCD.


title: MSSM Higgs Physics at Higher Orders

abstract:
  Various aspects of the Higgs boson phenomenology of the Minimal
Supersymmetric Standard Model (MSSM) are reviewed. Emphasis is put on the
effects of higher-order corrections. The masses and couplings are discussed in
the MSSM with real and complex parameters. Higher-order corrections to Higgs
boson production channels at a prospective e+ e- linear collider are
investigated. Corrections to Higgs boson decays to SM fermions and their
phenomenological implications for hadron and lepton colliders are explored.


title:
Electroweak baryon number non-conservation and "topological condensates"
  in the early Universe

abstract:
  Electroweak vacuum transition processes (sphalerons) in the early Universe
provide a possible explanation of the baryon asymmetry. Anomaly theory suggests
that these electroweak baryon number non-conserving processes are accompanied
by the formation of a ``topological condensate'' which may remain in the
Universe that we observe today.


title: Chiral perturbation theory: a basic introduction

abstract:
  Chiral perturbation theory is a very general expansion method which can be
applied to any dynamical system which has continuous global symmetries and in
which the ground state breaks some of these spontaneously. In these lectures we
explain at a basic level and in detail how such symmetries are identified in
the case of the QCD Lagrangian and describe the steps which are involved in
practice in the construction of a low-energy effective theory for QCD.


title:
Constraints on Parton Charge Symmetry and Implications for Neutrino
  Reactions

abstract:
  For the first time, charge symmetry breaking terms in parton distribution
functions have been included in a global fit to high energy data. We review the
results obtained for both valence and sea quark charge symmetry violation, and
we compare these results with the most stringent experimental upper limits on
charge symmetry violation for parton distribution functions, and with
theoretical estimates of charge symmetry violation. The limits allowed in the
global fit would tolerate a rather large violation of charge symmetry. We
discuss the implications of this for the extraction of the Weinberg angle in
neutrino DIS by the NuTeV collaboration.


title: FCNC and Rare B Decays in 3-3-1 Models

abstract:
  An interesting extension of the Standard Model is based on the electroweak
gauge group SU(3)_L x U(1). It requires three generations to cancel anomalies,
treats the third generation differently than the first two, and has a rich
phenomenology. There are several models, distinguished by the embedding of the
charge operator into the SU(3)_L group and by the choice of fermion
representations. In this Brief Report, we consider flavor-changing neutral
currents in these models, concentrating on the P-Pbar mass difference, where
P=(K, D, B, B_s), as well as B --> K l^+ l^-, B --> mu^+ mu^- and B_s --> mu^+
mu^- decays. Although the P-Pbar mass difference has been considered previously
in some models, the rare B decays are new. We find that the strongest bounds
come from the B-Bbar and Bs-Bs-bar mass differences.


title: Two-loop electroweak corrections to Higgs production at hadron colliders

abstract:
  We compute the two-loop electroweak corrections due to the top quark to the
gluon fusion production cross section of an intermediate-mass Higgs boson. This
result, together with the previously known contribution due to the light
fermions, allows a complete determination of the two-loop electroweak
corrections to this production cross section. For Higgs mass values above 120
GeV the top corrections have opposite sign of the light fermions contribution,
however they are always smaller in size reaching at most 15% of the latter. The
total electroweak corrections to the gluon fusion production cross section for
115 GeV < m_H < 2 m_W range from 5% to 8% of the lowest order term.


title: Brane inflation and the fine-tuning problem

abstract:
  Brane inflation can provide a promissing framework for solving the
fine-tuning problem in standard inflationary models. The aim of this paper is
to illustrate the mechanism by which this can be achieved. By considering the
supersymmetric two-stage inflation model it is shown that the initial
fine-tuning of the coupling parameter can be considerably relaxed. SubPlanckian
values of the inflaton during inflation can also be obtained.


title: Theoretical Summary of Moriond 2004: QCD and Hadronic Interactions

abstract:
  Theoretical talks and discussions at Rencontres de Moriond 2004 "QCD and
Hadronic Interactions" are summarized. Following exciting recent experimental
discoveries, theoretical developments were reported in the description of heavy
ion collisions, light hadron spectroscopy, and the physics of hadrons
containing heavy quarks. Some of the predictions have already been tested by
subsequent experiments, notably by the very recent SELEX observation of a
possible new charm-strange meson D_{sJ}(2632).


title: Lorentz-Violating Electrostatics and Magnetostatics

abstract:
  The static limit of Lorentz-violating electrodynamics in vacuum and in media
is investigated. Features of the general solutions include the need for
unconventional boundary conditions and the mixing of electrostatic and
magnetostatic effects. Explicit solutions are provided for some simple cases.
Electromagnetostatics experiments show promise for improving existing
sensitivities to parity-odd coefficients for Lorentz violation in the photon
sector.


title: Single Kaluza Klein Production in Universal Extra Dimensions

abstract:
  In the universal extra dimensions models, Kaluza Klein excitations of matter
are generaly produced in pairs. However, if matter lives on a fat brane
embedded in a larger space, gravity-matter interactions do not obey KK number
conservation, thus making possible the production of single KK excitations at
colliders. We evaluate the production rates for such excitations at the
Tevatron and LHC colliders, and look for ways to detect them.


title: Higgs Boson Resummation via Bottom-Quark Fusion

abstract:
  The region of small transverse momentum in q-qbar- and gg-initiated processes
must be studied in the framework of resummation to account for the large,
logarithmically-enhanced contributions to physical observables. In this letter,
we study resummed differential cross-sections for Higgs production via
bottom-quark fusion. We find that the differential distribution peaks at
approximately 15 GeV, a number of great experimental importance to measuring
this production channel.


title:
CDF Forward Detectors and diffractive structure functions at the
  Fermilab Tevatron

abstract:
  The CDF Forward Detector upgrade project was designed to enhance the
capabilities for diffractive physics at the Tevatron. It consists of a Roman
Pot spectrometer to detect leading antiprotons, a set of counters near and
around the beam-pipe to reject the non-diffractive event contamination to the
data sample, and two Miniplug calorimeters to measure the event energy flow in
the very forward rapidity region. In the novel design of the Miniplugs, a
lead/liquid-scintillator is read out by wave-length shifting fibers arranged in
a flexible tower geometry and relatively short depth allows calorimetric
tracking. Performance of the Forward Detectors during the first two years of
operation in Run II with colliding proton-antiproton beams at $\sqrt{s}$=1.96
TeV, as well as the first results obtained, are discussed. A measurement of the
antiproton momentum loss using the Forward Detectors is also presented.


title: Testing Relativity with Orbiting Oscillators

abstract:
  Clock-comparison experiments using a satellite platform can give Planck-scale
sensitivity to many parameters for Lorentz and CPT violation that are difficult
to measure on Earth. A discussion of the theoretical framework for such tests
is given, with emphasis on comparisons of output frequencies of atomic clocks
and of electromagnetic cavity oscillators.


title: Gapless CFL and its competition with mixed phases

abstract:
  We recently argued that as the density of quark matter decreases, there is a
continuous transition from the color-flavor-locked (CFL) phase to a gapless
"gCFL" phase. The reason is the growing importance of the strange quark mass,
and the constraint of electric/color neutrality. In this paper we discuss mixed
phases that achieve neutrality by charge seperation, and might offer an
alternative to the gCFL phase. We find that none of the obvious mixtures is
favored relative to gCFL.


title: Bound States and Critical Behavior of the Yukawa Potential

abstract:
  We investigate the bound states of the Yukawa potential $V(r)=-\lambda
\exp(-\alpha r)/ r$, using different algorithms: solving the Schr\"odinger
equation numerically and our Monte Carlo Hamiltonian approach. There is a
critical $\alpha=\alpha_C$, above which no bound state exists. We study the
relation between $\alpha_C$ and $\lambda$ for various angular momentum quantum
number $l$, and find in atomic units, $\alpha_{C}(l)= \lambda [A_{1} \exp(-l/
B_{1})+ A_{2} \exp(-l/ B_{2})]$, with $A_1=1.020(18)$, $B_1=0.443(14)$,
$A_2=0.170(17)$, and $B_2=2.490(180)$.


title:
Flavor-singlet light-cone amplitudes and radiative Upsilon decays in
  SCET

abstract:
  We study the evolution of flavor-singlet, light-cone amplitudes in the
soft-collinear effective theory (SCET), and reproduce results previously
obtained by a different approach. We apply our calculation to the color-singlet
contribution to the photon endpoint in radiative Upsilon decay. In a previous
paper, we studied the color-singlet contributions to the endpoint, but
neglected operator mixing, arguing that it should be a numerically small
effect. Nevertheless the mixing needs to be included in a consistent
calculation, and we do just that in this work. We find that the effects of
mixing are indeed numerically small. This result combined with previous work on
the color-octet contribution and the photon fragmentation contribution provides
a consistent theoretical treatment of the photon spectrum in radiative Upsilon
decay.


title: Twisted Split Fermions

abstract:
  The observed flavor structure of the standard model arises naturally in
"split fermion" models which localize fermions at different places in an extra
dimension. It has, until now, been assumed that the bulk masses for such
fermions can be chosen to be flavor diagonal simultaneously at every point in
the extra dimension, with all the flavor violation coming from the Yukawa
couplings to the Higgs. We consider the more natural possibility in which the
bulk masses cannot be simultaneously diagonalized, that is, that they are
twisted in flavor space. We show that, in general, this does not disturb the
natural generation of hierarchies in the flavor parameters. Moreover, it is
conceivable that all the flavor mixing and CP-violation in the standard model
may come only from twisting, with the five-dimensional Yukawa couplings taken
to be universal.


title: Low x saturation at HERA ?

abstract:
  We compare the predictions of two distinct dipole models for inclusive and
exclusive diffractive processes. While only one of these dipole models contains
perturbative saturation dynamics, we show that the predictions of both models
are fully consistent with the available HERA data, indicating no compelling
evidence for saturation at present HERA energies.


title: The United Families of Massive Neutrinos of a Different Nature

abstract:
  At the availability of a nonzero mass, the same neutrino regardless of
whether it refers to Dirac or Majorana fermions, must possess simultaneously
each of the anapole and electric dipole moments. Their interaction with the
field of emission can also lead to the elastic scattering of the longitudinal
polarized neutrinos on a spinless nucleus. Using the cross section of a
process, the united equation has been obtained between the anapole and electric
dipole form factors of Dirac and Majorana neutrinos. It corresponds in nature
to the coexistence of neutrinos of both types. As a consequence, each Dirac
neutrino testifies in favor of the existence of a kind of Majorana neutrino.
They constitute herewith the united families of massive neutrinos of a
different nature. Therefore, any of the earlier measured properties of
neutrinos may serve as a certain indication of the existence simultaneously of
both Dirac and Majorana neutrinos. All findings are also confirmed by the
comparatively new laboratory restrictions on the self-masses of these fermions.
Thereby they state that electromagnetic gauge invariance must have a new
structure, which depends on nature of the inertial mass and says that
P-symmetry of a particle is basically violated at the expense of its rest mass.


title: CP asymmetry in B \to phi K_S in a SUSY SO(10) GUT

abstract:
  We study the $B\to \phi K_S$ decay in a SUSY SO(10) GUT. We calculate the
mass spectrum of sparticles for a given set of parameters at the GUT scale. We
complete the calculations of the Wilson coefficients of operators including the
new operators which are induced by NHB penguins at LO using the MIA with double
insertions. It is shown that the recent experimental results on the
time-dependent CP asymmetry $S_{\phi K}$ in $B\to \phi K_S$, which is negative
and can not be explained in SM, can be explained in the model where there are
flavor non-diagonal right-handed down squark mass matrix elements of 2nd and
3rd generations whose size satisfies all relevant constraints from known
experiments ($\tau \to \mu \gamma$, $B\to X_S\gamma, B_s\to \mu^+\mu^-, B\to
X_s \mu^+\mu^-, B\to X_s g, \Delta M_s$, etc.). At the same time, the branching
ratio for the decay can also be in agreement with experimental measurements.


title: Topics on Hydrodynamic Model of Nucleus-Nucleus Collisions

abstract:
  A survey is given on the applications of hydrodynamic model of
nucleus-nucleus collisons, focusing especially on i) the resolution of
hydrodynamic equations for arbitrary configurations, by using the
smoothed-particle hydrodynamic approach; ii) effects of the event-by-event
fluctuation of the initial conditions on the observables; iii) decoupling
criteria; iv) analytical solutions; and others.


title: Anomalous magnetic moment in parity-conserving QED3

abstract:
  In this article we derive the anomalous magnetic moment of fermions in
(2+1)-dimensional parity-conserving QED3, in the presence of an externally
applied constant magnetic field. We use a spectral representation of the photon
propagator to avoid infrared divergences. We also discuss the scaling with the
magnetic field intensity in the case of strong external fields, where there is
dynamical mass generation for fermions induced by the magnetic field itself
(magnetic catalysis). The results of this paper may be of relevance to the
physics of high-temperature superconductors.


title: A Simple Model for Generalised Parton Distributions of the Pion

abstract:
  We present here an extension of our model for the pion, which we used
previously to calculate its diagonal structure function, to the off-forward
case. The imaginary part of the off-forward gamma^* pi -> gamma^* pi scattering
amplitude is evaluated in the chiral limit (m_pi=0) and related to the
twist-two and twist-three generalised parton distributions H, H3, H3tilde.
Non-perturbative effects, linked to the size of the pion and still preserving
gauge invariance, are included. Remarkable new relations between H, H3 and
H3tilde are obtained and discussed.


title: The flavour puzzle from an orbifold GUT perspective

abstract:
  Neutrino masses and mixings are very different from quark masses and mixings.
This puzzle is a crucial hint in the search for the mechanism which determines
fermion masses in grand unified theories. We study the flavour problem in an
SO(10) GUT model in six dimensions compactified on an orbifold. Three
sequential families are localized at three branes where SO(10) is broken to its
three GUT subgroups. Their mixing with bulk fields leads to large neutrino
mixings as well as small mixings among left-handed quarks. The small hierarchy
of neutrino masses is due to the mismatch between up-quark and down-quark mass
hierarchies.


title: Binary systems of neutral mesons in Quantum Field Theory

abstract:
  Quasi-degenerate binary systems of neutral mesons of the kaon type are
investigated in Quantum Field Theory (QFT). General constraints cast by
analyticity and discrete symmetries P, C, CP, TCP on the propagator (and on its
spectral function) are deduced. Its poles are the physical masses; this
unambiguously defines the propagating eigenstates. It is diagonalized and its
spectrum thoroughly investigated. The role of ``spurious'' states, of zero norm
at the poles, is emphasized, in particular for unitarity and for the
realization of TCP symmetry. The K_L-K_S mass splitting triggers a tiny
difference between their CP violating parameters \epsilon_L and \epsilon_S,
without any violation of TCP. A constant mass matrix like used in Quantum
Mechanics (QM) can only be introduced in a linear approximation to the inverse
propagator, which respects its analyticity and positivity properties; it is
however unable to faithfully describe all features of neutral mesons as we
determine them in QFT, nor to provide any sensible parameterization of eventual
effects of TCP violation. The suitable way to diagonalize the propagator makes
use of a bi-orthogonal basis; it is inequivalent to a bi-unitary transformation
(unless the propagator is normal, which cannot occur here). Problems linked
with the existence of different ``in'' and ``out'' eigenstates are smoothed
out. We study phenomenological consequences of the differences between the QFT
and QM treatments. The non-vanishing of semi-leptonic asymmetry \delta_S -
\delta_L does not signal, unlike usually claimed, TCP violation, while A_TCP
keeps vanishing when TCP is realized. We provide expressions invariant by the
rephasing of K0 and K0bar.


title: Invisible Higgs Boson Decays in Spontaneously Broken R-Parity

abstract:
  The Higgs boson may decay mainly to an invisible mode characterized by
missing energy, instead of the Standard Model channels. This is a generic
feature of many models where neutrino masses arise from the spontaneous
breaking of ungauged lepton number at relatively low scales, such as
spontaneously broken R-parity models. Taking these models as framework, we
reanalyze this striking suggestion in view of the recent data on neutrino
oscillations that indicate non-zero neutrino masses. We show that, despite the
smallness of neutrino masses, the Higgs boson can decay mainly to the invisible
Goldstone boson associated to the spontaneous breaking of lepton number. This
requires a gauge singlet superfield coupling to the electroweak doublet
Higgses, as in the Next to Minimal Supersymmetric Standard Model (NMSSM)
scenario for solving the $\mu$-problem. The search for invisibly decaying Higgs
bosons should be taken into account in the planning of future accelerators,
such as the Large Hadron Collider and the Next Linear Collider.


title: QCD Vacuum Topology and Glueballs

abstract:
  We outline a comprehensive study of spin-0 glueball properties which, in
particular, keeps track of the topological gluon structure. Specifically, we
implement (semi-hard) topological instanton physics as well as topological
charge screening in the QCD vacuum into the operator product expansion (OPE) of
the glueball correlators. A realistic instanton size distribution and the
(gauge-invariant) renormalization of the instanton contributions are also
implemented. Predictions for 0^{++} and 0^{-+} glueball properties are
presented.


title:
Similarity between Kaluza-Klein and Open-string amplitudes in Diphoton
  Production

abstract:
  We calculate the tree-level open-string amplitudes for the scattering of four
massless particles with diphoton final states. These amplitudes are required to
reproduce those of standard model at the tree level in the low energy limit.
After low energy stringy corrections, we found that they have similar form to
the same processes induced by exchange of the Kaluza-Klein(KK) excitations of
graviton in ADD scenario. Using this similarity, we apply constraints on the KK
mass scale $M_D$ to the string scale $M_S$. The results are consistent with
constraints from the 4-fermion scattering, about $0.6-0.9$ TeV.


title:
Status of chiral doublers of heavy-light hadrons in light of recent
  BaBar Cleo, Belle and Selex D_s states

abstract:
  We explain the main idea of the chiral doublers scenario, originating from
simultaneous constraints of chiral symmetry and of heavy quark spin symmetry on
effective theories of heavy-light hadrons. In particular we discuss chiral
doublers for mesons, chiral doublers for excited mesons, chiral doublers for
baryons and chiral doublers for excited baryons. We point out the arguments why
new states D_s(2317) and D_s(2457) might be viewed as chiral doublers of D_s
and D_s^*. Then we comment on non-strange mesons D_0(2308) and D_1'(2427)
observed by Belle and Focus, and on Theta_c(3099) signal observed by H1.
Finally, we point out that very recent discovery by SELEX of D_s(2632), if
confirmed by other experiments and if spin-parity of this state is 1^-, may be
interpreted as a signal for chiral doubler of D_{s1}(2536). Such an
identification implies another narrow, spin-parity 2^- D_s state ca 37 MeV
above the new 1^-, corresponding to chiral partner of D_{s2}.


title: CP Violation in B -> pi K Decays

abstract:
  I briefly review CP violation in the B system, concentrating on B -> pi K
decays. I discuss how to deal with electroweak-penguin contributions to these
decays using flavour SU(3). With these, I show that the entire unitarity
triangle can be extracted from measurements of B -> pi K decays. Finally, I
examine the signals for new physics in these decays and the possibilities for
measuring them.


title: Light Scalar Decay in Diquark Chiral Effective Theory

abstract:
  We calculate the decay rate of light scalar mesons, using a diquark chiral
effective theory, recently proposed to describe exotic hadrons. In the
effective theory the light scalar mesons are postulated to be bound states of
diquark and anti-diquark. We find our results are in good agreement with
experimental data. The axial couplings of diquarks with pions and kaons are
found to be quite small and the perturbation is reliable. It shows that the
diquark picture captures the correct physics of light scalar mesons.


title:
Tau polarization in quasielastic charged-current
  neutrino(antineutrino)-nucleus scattering

abstract:
  The quasielastic charged-current (CC) tau neutrino (antineutrino)-nucleus
scattering is considered.
  The dependence of tau polarization on nuclear-structure effects is discussed
in detail.
  The description of the nucleus is based on the Mean-Field Theory (MFT).
  The ground state of nucleus is described using the Relativistic Fermi Gas
model (FG).
  The effective mass is introduced as well as the ring Random Phase
Approximation (RPA) effects are taken into account in the framework of
relativistic meson-nucleon model. The Local Density Approximation (LDA) is used
for the argon nucleus, having in mind possible application to the ICARUS
experiment. The discussion concentrates on the threshold region where the
$\tau^-$ can be unpolarized and the nuclear effects play an important role.


title:
Nucleon form factors measurements via the radiative return at B-meson
  factories

abstract:
  The present-day experimental situation concerning nucleon form factors in the
space-like region shows a substantial discrepancy between measurements via the
Rosenbluth method and the recoil polarisation technique.
  More information about nucleon form factors in the time-like region will not
only improve poor experimental knowledge there, but it will also shed light on
the situation in the space-like region. The radiative return method is a
powerful tool to provide that information using data of B- meson factories.


title: WroNG -- Wroclaw Neutrino Generator of events for single pion production

abstract:
  We constructed a new Monte Carlo generator of events for neutrino CC single
pion production on free nucleon targets. The code uses dynamical models of the
DIS with the PDFs modified according to the recent JLab data and of the Delta
excitation. A comparison with experimental data was done in three channels for
the total cross sections and for the distributions of events in invariant
hadronic mass.


title: Singularities of Feynman amplitude and cutting rules

abstract: The contents of this manuscript has been moved to hep-ph/0412204.


title: On the Singlet Penguin in B --> K eta' decay

abstract:
  New contributions to the short-distance b --> s eta' transition are
considered. They correspond to the quark and gluon content of eta'. Although
substantially larger than the referent QCD anomaly tail, they still cannot
account for the observed eta' enhancement.


title: Generalized parton distributions and wide-angle exclusive scattering

abstract:
  The handbag mechanism for wide-angle exlusive scattering reactions is
discussed and compared with other theoretical approaches. Its application to
Compton scattering, meson photoproduction and two-photon annihilations into
pairs of hadrons is reviewed.


title:
Multichannel calculation for Ds* vector states and the Ds(2632)
  resonance

abstract:
  We study bound states below threshold and resonances above threshold in the
D0-K+ and Ds-eta systems, using a many-coupled-channel model for non-exotic
meson-meson scattering applied to states with the quantum numbers of c-sbar
quark-antiquark vector mesons. We fit the ground state at 2.112 GeV, whence the
lowest resonances in D0-K+ come out at 2.61, 2.72, 3.03, and 3.08 GeV. The
resonance at 2.61 GeV acquires a width of about 8 MeV, while its partial P-wave
cross section is up to six times larger in Ds-eta than in D0-K+, provided a
mechanism accounting for Okubo-Zweig-Iizuka--forbidden decays is included. The
latter finding is in agreement with the observations of the SELEX collaboration
with respect to the recently reported DsJ(2632) resonance. Therefore, we
conclude that the DsJ(2632) is most probably the first recurrence excitation of
the Ds*(2112) meson.


title:
On the SU(3) Symmetry-Breaking Corrections to Meson Distribution
  Amplitudes

abstract:
  We consider constraints on the momentum fraction of the $K$ and $K^*$ meson
carried by the strange quark that follow from exact operator identities,
similar to those for the divergence of the quark part of the QCD
energy-momentum tensor. The existing QCD sum rule estimates are reanalyzed in
this context. Our conclusions essentially support the constituent quark-model
picture where the momentum fraction is roughly proportional to the constituent
quark mass, but the asymmetry turns out to be smaller compared to the naive
quark model estimates. As a byproduct of this study, we calculate the
SU(3)-breaking quark-antiquark-gluon matrix elements that determine the leading
conformal spin contributions to the asymmetry in twist-four distribution
amplitudes of strange mesons $K$ and $K^*$, and also update the estimate for
the SU(3) breaking for the quark-antiquark-gluon vacuum condensate.


title:
Tau polarization in charge current neutrino-nucleon Deep Inelastic
  Scattering

abstract:
  Numerical results for the degree of polarization of \tau^- produced in (CC)
neutrino - nucleon Deep Inelastic Scattering (DIS) are presented. Calculations
are done in the threshold region, where the \tau^- scattered by the small
angles and can be partially polarized. The cross sections and polarization are
calculated by using the GRV98 parton distributions functions (PDF's) and the
GRV98 with modifications of A. Bodek at.al.


title: Supersymmetric contributions to B --> K \pi branching ratio

abstract:
  We analyze the supersymmetric contributions to the B --> K\pi process. We
show that the simultaneous contributions from the penguin diagrams with
chargino and gluino in the loop could lead to a possible solution to the B -->
K \pi puzzle. Our result indicates that including the stringent constraint from
the b --> s \gamma branching ratio, the supersymmeteric models with light
right-handed top-squark and large mixing between second and third generation of
up and down squarks is the most preferred by the current experimental data.


title:
Bounding the MSSM Higgs sector from above with the Tevatron's B_s -->
  mu^+ mu^-

abstract:
  The discovery potential of the Tevatron CDF for the rare B-decay B_s --> mu^+
mu^- is analysed. We find that with an integrated luminosity of 2 fb^(-1), and
using CDF as the example detector, a 5 sigma combined discovery reach of the
Tevatron is possible if the Branching ratio for B_s --> mu^+ mu^- is (1.7 +-
0.46) \times 10^(-7). Such a possible signal for the decay B_s --> mu^+ mu^-
will invite large tan(beta) values and set an upper bound on the heaviest mass
of the MSSM Higgs sector in a complete analogy to the upper bound of the
lightest observable supersymmetric particle set from the excess over the SM
prediction of the muon anomalous magnetic moment. If for example, the decay B_s
-->mu^+ mu^- is found at Tevatron with branching ratio 2 \times 10^(-7) then
the heaviest Higgs boson mass in the MSSM should be less than 790 GeV for
tan(beta) < 50 provided that the CKM matrix is the only source for (s)quark
flavour changing processes.


title:
Principles of general final-state resummation and automated
  implementation

abstract:
  Next-to-leading logarithmic final-state resummed predictions have
traditionally been calculated, manually, separately for each observable. In
this article we derive NLL resummed results for generic observables. We
highlight and discuss the conditions that the observable should satisfy for the
approach to be valid, in particular continuous globalness and recursive
infrared and collinear safety. The resulting resummation formula is expressed
in terms of certain well-defined characteristics of the observable. We have
written a computer program, CAESAR, which, given a subroutine for an arbitrary
observable, determines those characteristics, enabling full automation of a
large class of final-state resummations, in a range of processes.


title: Resummed event shapes at hadron-hadron colliders

abstract:
  This article introduces definitions for a number of new event shapes and
jet-rates in hadron-hadron dijet production. They are designed so as to be
measurable in practice at the Tevatron and the LHC, and to be global so that
they can be resummed with currently available techniques. We explain how to
vary their sensitivity to beam fragmentation, limiting its impact for purely
perturbative studies, or deliberately enhancing it so as to focus on
non-perturbative effects. Explicit next-to-leading logarithmic resummed results
are presented, as obtained with CAESAR.


title:
Three-Loop Radiative-Recoil Corrections to Hyperfine Splitting Generated
  by One-Loop Fermion Factors

abstract:
  We consider three-loop radiative-recoil corrections to hyperfine splitting in
muonium generated by diagrams with one-loop radiative photon insertions both in
the electron and muon lines. An analytic result for these nonlogarithmic
corrections of order $\alpha(Z^2\alpha)(Z\alpha)(m/M)\widetilde E_F$ is
obtained. This result constitutes a next step in the implementation of the
program of reduction of the theoretical uncertainty of hyperfine splitting
below 10 Hz.


title: On tetraquark meson states

abstract:
  It is suggested that the narrow meson state seen in the the SELEX experiment
is a $(c\bar{s} s\bar{s})$ tetraquark state. Characteristics of other possible
tetraquarks formed out of $c$ and $s$ quarks and antiquarks are considered.


title: Update of the Hagedorn mass spectrum

abstract:
  We present an update of the Hagedorn hypothesis of the exponential growth of
the number of hadronic resonances with mass. We use the newest available
experimental data for the non-strange mesons and baryons, as well as fill in
some missing states according to the observation that the high-lying states
form chiral multiplets. The results show, especially for the case of the
mesons, that the Hagedorn growth continues with the increasing mass, with the
new states lining up along the exponential growth.


title: Comparative Study of CP Asymmetries in Supersymmetric Models

abstract:
  We systematically analyze the supersymmetric contributions to the mixing CP
asymmetries and branching ratios of B -> Phi K(S) and B -> eta(prime) K(S)
processes. We consider both gluino and chargino exchanges in a model
independent way by using the mass insertion approximation method. While we
adopt the QCD factorization approach for evaluating the corresponding hadronic
matrix elements, a critical comparison with predictions in naive factorization
one is also provided. We find that pure chargino contributions cannot
accommodate the current experimental results on CP asymmetries, mainly due to b
-> s gamma constraints. We show that charged Higgs contributions can relax
these constraints making chargino responsible for large asymmetries. On the
other hand, gluino exchanges can easily saturate both the constraints on B ->
Phi K(S) and B -> eta(prime) K(S) CP asymmetries. Moreover, we also find that
the simultaneous contributions from gluino and chargino exchanges could easily
account for the present experimental results on the mentioned asymmetries.
Remarkably, large experimentally allowed enhancements of B -> eta(prime) K(S)
branching ratio can easily be achieved by the contribution of two mass
insertions in gluino exchanges. Finally, we analyze the correlations between
the CP asymmetries of these processes and the direct CP asymmetry in b -> s
gamma decay. When all experimental constraints are satisfied, supersymmetry
favors large and positive values of b -> s gamma asymmetry.


title: Klein-Gordon Equation for Quark Pairs in Color Superconductor

abstract:
  The wave equation is derived for quark pairs in color superconductor in the
regime of low density / strong coupling.


title: Charm decays

abstract:
  To write a review on charm decays is not an easy task because of the large
amount (fortunately!) of experimental results in the recent years. I was forced
to make a selection of topics. I am going to discuss with the eyes of an
experimentalist: D0-D0bar mixing, CP violation, rare decays, charm lifetimes,
semileptonic decays, hadronic decays, and the big surprise of the DsJ states.
Obviously there are some missing topics, however I hope to show clearly my
point of view.


title: Dynamical Mass Generation in Landau gauge QCD

abstract:
  We summarise results on the infrared behaviour of Landau gauge QCD from the
Green's functions approach and lattice calculations. Approximate,
nonperturbative solutions for the ghost, gluon and quark propagators as well as
first results for the quark-gluon vertex from a coupled set of Dyson-Schwinger
equations are compared to quenched and unquenched lattice results. Almost
quantitative agreement is found for all three propagators. Similar effects of
unquenching are found in both approaches. The dynamically generated quark
masses are close to `phenomenological' values. First results for the
quark-gluon vertex indicate a complex tensor structure of the non-perturbative
quark-gluon interaction.


abstract:
  The Kwiecinski evolution of unintegrated parton distributions (UPDs) in the
transverse-coordinate space is analyzed with the help of the Mellin transform.
Numerical results are presented for the unintegrated pion distributions with a
simple valence-like initial condition at the low scale, which follows from
chiral large-Nc quark models. The effect of spreading of UPDs in the transverse
momentum with the increasing scale is confirmed, with <kT^2> growing
asymptotically as Q^2 alpha(Q^2). Formal aspects of the equations, such as the
limits of UPDs at x -> 0, x -> 1, and at low and large b, are straightforward
to obtain with our method.


title: Understanding $D_{sJ}^*(2317)$, $D_{sJ}(2460)$

abstract:
  I briefly review the experimental observations concerning the charmed mesons
$D_{sJ}^*(2317)$, $D_{sJ}(2460)$ and survey on some of the interpretations
proposed in order to understand their nature. I present an analysis of their
decay modes in the hypothesis that they can be identified with the scalar and
axial vector $s_\ell^P={1 \over 2}^+$ states of $c{\bar s}$ spectrum
($D_{s0}^*$, $D_{s1}^\prime$). The method is based on heavy quark symmetries
and Vector Meson Dominance ansatz. Comparison with present data supports the
interpretation.


title: Very massive underground detectors for proton decay searches

abstract:
  Massive underground detectors can be considered as sort of observatories for
rare physics phenomena like astrophysical neutrino detection and nucleon decay
searches. We briefly overview the past tracking calorimeters developed for
nucleon decay searches. We then discuss the two technologies which are
discussed today for potential future applications: Water Cerenkov ring imaging
(WC) and liquid Argon Time Projection Chamber (LAr TPC). We present a
conceptual design for a 100 kton liquid Argon TPC. We illustrate the physics
performance of Water Cerenkov and liquid Argon TPC detectors for the $p\to
e^+\pi^0$ and $p\to \nu K^+$ proton decay searches. We briefly compare the
physics reach of the two techniques. We conclude by stressing the
complementarity of the two approaches, noting however that, given the
foreseeable timescale for these next generation experiments, the new
challenging technique of the LAr TPC might offer more discovery potentials.


title: Jet Photoproduction in Peripheral Heavy-Ion Collisions

abstract:
  In peripheral relativistic heavy ion collisions at the Large Hadron Collider,
jet+jet and photon+jet final states can be produced when a photon from the
virtual photon field surrounding the nucleus interacts with a parton in the
opposite nucleus (direct production). The virtual photon may also fluctuate
into states with multiple gluons and q-qbar pairs (resolved production),
opening more channels for jet photoproduction. We compare the rates for direct
and resolved jet+jet and photon+jet production to explore the sensitivity to
the nuclear and photon parton distribution functions. We calculate the
transverse momentum distributions of both partonic jets and leading hadrons
produced by jet fragmentation.


title:
Clebsch-Gordan Coefficients for the Extended Quantum-Mechanical
  Poincar\'e Group and Angular Correlations of Decay Products

abstract:
  This paper describes Clebsch-Gordan coefficients (CGCs) for unitary
irreducible representations (UIRs) of the extended quantum mechanical
Poincar\'e group $\pt$. `Extended' refers to the extension of the 10 parameter
Lie group that is the Poincar\'e group by the discrete symmetries $C$, $P$, and
$T$; `quantum mechanical' refers to the fact that we consider projective
representations of the group. The particular set of CGCs presented here are
applicable to the problem of the reduction of the direct product of two
massive, unitary irreducible representations (UIRs) of $\pt$ with positive
energy to irreducible components. Of the sixteen inequivalent representations
of the discrete symmetries, the two standard representations with $U_C U_P =
\pm 1$ are considered. Also included in the analysis are additive internal
quantum numbers specifying the superselection sector. As an example, these CGCs
are applied to the decay process of the $\Upsilon(4S)$ meson.


title:
Target mass corrections for virtual Compton scattering at twist-2 and
  generalized, non-forward Wandzura-Wilczek and Callan-Gross relations

abstract:
  The off-cone Compton operator of twist-2 is Fourier transformed using a
general procedure which is applicable, in principle, to any QCD tensor operator
of definite (geometric) twist. That method allows, after taking the non-forward
matrix elements, to separate quite effectively their imaginary part and to
reveal some hidden structure in terms of appropriately defined variables,
including generalized Nachtmann variables. In this way, without using the
equations of motion, generalizations of the Wandzura-Wilzcek relation and of
the mass-corrected Callan-Gross relation to the non-forward scattering, having
the same shape as in the forward case, are obtained. In addition, new relations
for those structure functions which vanish in the forward case are derived.
These structure functions are written in terms of iterated generalized parton
distributions of $n$-th order.


title:
The twist-2 Compton operator and its hidden Wandzura-Wilczek and
  Callan-Gross relations

abstract:
  Power corrections for virtual Compton scattering at leading twist are
etermined at operator level. From the complete off-cone representation of the
twist-2 Compton operator integral representations for the trace, antisymmetric
and symmetric part of that operator are derived. The operator valued invariant
functions are written in terms of iterated operators and may lead to
interrelations. For matrix elements they go over into relations for generalized
parton distributions. -- Reducing to the s-channel relevant part one gets
operator pre-forms of the Wandzura-Wilczek and the (target mass corrected)
Callan-Gross relations whose structure is exactly the same as known from the
case of deep inelastic scattering; taking non-forward matrix elements one
reproduces earlier results [B. Geyer, D. Robaschik and J. Eilers, Nucl. Phys. B
704 (2005) 279] for the absorptive part of the virtual Compton amplitude. --
All these relations, obtained without any approximation or using equations of
motion, are determined solely by the twist-2 structure of the underlying
operator and, therefore, are purely of geometric origin.


title: Lepton flavor violating Higgs boson decays from massive seesaw neutrinos

abstract:
  Lepton flavor violating Higgs boson decays are studied within the context of
seesaw models with Majorana massive neutrinos. Two models are considered: The
SM-seesaw, with the Standard Model Particle content plus three right handed
neutrinos, and the MSSM-seesaw, with the Minimal Supersymmetric Standard Model
particle content plus three right handed neutrinos and their supersymmetric
partners. The widths for these decays are derived from a full one-loop
diagrammatic computation in both models, and they are analyzed numerically in
terms of the seesaw parameters, namely, the Dirac and Majorana mass matrices.
Several possible scenarios for these mass matrices that are compatible with
neutrino data are considered. In the SM-seesaw case, very small branching
ratios are found for all studied scenarios. These ratios are explained as a
consequence of the decoupling behaviour of the heavy right handed neutrinos. In
contrast, in the MSSM-seesaw case, sizeable branching ratios are found for some
of the leptonic flavor violating decays of the MSSM neutral Higgs bosons and
for some choices of the seesaw matrices and MSSM parameters. The relevance of
the two competing sources of lepton flavor changing interactions in the
MSSM-seesaw case is also discussed. The non-decoupling behaviour of the
supersymmetric particles contributing in the loop-diagrams is finally shown.


title: Impact of PDF uncertainties on extra-dimensions sensitivity at LHC

abstract:
  The LHC data will provide sensitivity to an unification of the couplings at
low energies in the range $\sim$10-100 TeV. It is demonstrated in this note
that the lack of knowledge on the proton structure, specifically its gluon
distribution, can lower dramatically the sensitivity of bare cross section
measurements to this physics. However, some more elaborated strategies could
probably be developped to recover an important part of the sensitivity


title: Spin-1 Particle in the Light-Front Approach

abstract:
  The electromagnetic current of spin-1 composite particles does not transform
properly under rotations if only the valence contribution is considered in the
light-front model. In particular, the plus component of the current, evaluated
only for the valence component of the wave function, in the Drell-Yan frame
violates rotational symmetry, which does not allow a unique calculation of the
electromagnetic form-factors. The prescription suggested by Grach and
Kondratyuk [Sov. J. Nucl. Phys. 38, 198 (1984)] to extract the form factors
from the plus component of the current, eliminates contributions from pair
diagrams or zero modes, which if not evaluated properly cause the violation of
the rotational symmetry. We address this problem in an analytical and covariant
model of a spin-1 composite particle.


title:
Mass spectrum of the J^P=1/2^- and 3/2^- pentaquark antidecuplets in the
  perturbative chiral quark model

abstract:
  We study the recently discovered Theta^+ baryon in the context of the
perturbative chiral quark model. The basic configuration of the Theta^+ is set
up as a pentaquark bound state, where the single particle wave functions are
the ground state solutions of a confining potential. We classify the resulting
pentaquark multiplets as the J^P=1/2^- and 3/2^- flavor SU(3) antidecuplet. The
full mass spectrum of the multiplets is determined by including meson and gluon
cloud contributions inducing flavor SU(3) breaking. Mainly due to the
semi-perturbative gluon effects the resulting 3/2^- antidecuplet is about 185
MeV heavier than the 1/2^- one. We assign the observed Theta^+ baryon as a
member of the 1/2^- antidecuplet and discuss in particular the relation to the
recent experimental signal for a Xi^{--} baryon.


title: Large Nc Continuum Reduction and the Thermodynamics of QCD

abstract:
  It is noted that if large Nc continuum reduction applies to an observable,
then that observable is independent of temperature for all temperatures below
some critical value. This fact, plus the fact that mesons and glueballs are
weakly interacting at large Nc is used as the basis for a derivation of large
Nc continuum reduction for the chiral condensate. The structure of this
derivation is quite general and can be extended to a wide class of observables.


title: B and B_S decay constants from moments of Finite Energy Sum Rules in QCD

abstract:
  We use an appropriate combination of moments of finite energy sum rules in
QCD in order to compute the B_q-meson decays constants f_B and f_{B_s}.We
perform the calculation using a two-loop computation of the imaginary part of
the pseudoscalar two point function in terms of the running bottom quark mass.
The results are stable with the so called QCD duality threshold and they are in
agreement with the estimates obtained from Borel transform QCD sum rules and
lattice computations.


title: A Scaling Law for Quark Masses

abstract:
  We show that the observed quark masses seem to be consistent with a simple
scaling law. Due to the precise values of the heavy quarks we are able to
calculate the quark masses in the light quark sector. We discuss a possible
value for the strange quark mass. We show that the u-type quark masses obey the
scaling law very well.


title:
An NLO QCD Analysis of Inclusive Cross-section Data and Jet Production
  Data from the ZEUS Experiment at HERA-I

abstract:
  The ZEUS inclusive cross-section data from HERA-I, for charged and neutral
current processes, taken with $e^+$ and $e^-$ beams, have been used in a new
NLO QCD analysis to extract the parton distribution functions (PDFs) of the
proton within a single experiment. The precision of the high-$x$ gluon
determination is improved by using ZEUS differential cross-section data on
inclusive jet production in $e^+p$ scattering and di-jet production in
$\gamma-p$ scattering


title:
Analytical methods in heavy quark physics and the case of
  $\tau_{1/2}(w)$

abstract:
  Analytical methods in heavy quark physics are shortly reviewed, with emphasis
on the problems of dynamical calculations. Then, attention is attracted to the
various difficulties raised by a tentative experimental determination of
$\tau_{1/2}$


title: Update of MRST Parton Distributions

abstract:
  I present a brief summary of the most important updates in the MRST
determinations of the NLO and NNLO parton distributions. I concentrate on
uncertainties due to input assumptions and possible theoretical corrections,
particularly isospin violation, QED corrections, NNLO and corrections at low
Q^2 and small x.


title: Leptogenesis in the minimal supersymmetric triplet seesaw model

abstract:
  In the supersymmetric triplet (type-II) seesaw model, in which a single
SU(2)_L-triplet couples to leptons, the high-energy neutrino flavour structure
can be directly determined from the low-energy neutrino data. We show that even
with such a minimal triplet content, leptogenesis can be naturally accommodated
thanks to the resonant interference between superpotential and soft
supersymmetry breaking terms.


title: A Derivative of the Gerasimov-Drell-Hearn Sum Rule

abstract:
  We derive a sum rule which establishes a linear relation between a particle's
anomalous magnetic moment and a quantity connected to the photoabsorption
cross-section. This quantity cannot be measured directly. However, it can be
computed within a given theory. As an example, we demonstrate validity of the
sum rule in QED at tree level--the renowned Schwinger's correction to the
anomalous magnetic moment is readily reproduced. In the case of the strong
interactions, we also consider the calculation of the nucleon magnetic moment
within chiral theories.


title:
A comparison of ultraviolet sensitivities in universal, nonuniversal,
  and split extra dimensional models

abstract:
  We discuss the origin of ultraviolet sensitivity in extra dimensional
theories, and compare and contrast the cutoff dependences in universal,
nonuniversal and split five dimensional models. While the gauge bosons and
scalars are in the five dimensional bulk in all scenarios, the locations of the
fermions are different in different cases. In the universal model all fermions
can travel in the bulk, in the nonuniversal case they are all confined at the
brane, while in the split scenario some are in the bulk and some are in the
brane. A possible cure from such divergences is also discussed.


title: Color flows for the process gg --> Bc + c + b-bar

abstract:
  The contributions of different color flows into the gluonic Bc-meson
production cross section has been calculated. This study is essential to
simulate Bc-meson production with the help of Pythia program. The essence of
matter is that in the frame work of the Lund model used by Pythia the
hadronization way of the final partons and hadronic remnants depends on the
color flow type. The modified method for calculation of the color flow
contributions has been proposed.


title: CP violation in B meson decays

abstract:
  Recent CP asymmetry measurements in tree-dominated processes, $B^0\to
\pi^+\pi^-, \rho^+\rho^-, \rho^{\pm}\pi^{\mp}, B^+\to DK^+$, and in
penguin-dominated decays, $B \to \pi^0 K_S, \eta' K_S, \phi K_S$, are
interpreted in the framework of the Kobayashi-Maskawa (KM) mechanism of CP
violation. The KM phase emerges as the dominant source of CP violation in
tree-dominated decays, which are beginning to constrain the unitarity triangle
beyond other constraints. Improving precision of CP asymmetry measurements in
penguin-dominated decays may indicate the need for new physics.


title:
Complete Two-Loop Electroweak Fermionic Corrections to sin^2(theta_eff)
  and Indirect Determination of the Higgs Boson Mass

abstract:
  We present a complete calculation of the contributions to the effective
leptonic weak mixing angle, sin^2theta_eff, generated by closed fermion loops
at the two-loop level of the electroweak interactions. This quantity is the
source of the most stringent bound on the mass, M_H, of the only undiscovered
particle of the Standard Model, the Higgs boson. The size of the corrections
with respect to known partial results varies between -4*10^-5 and -8*10^-5 for
a realistic range of M_H from 100 to 300 GeV. This translates into a shift of
the predicted (from sin^2theta_eff alone) central value of M_H by +19 GeV, to
be compared with the shift induced by a recent change in the measured top quark
mass which amounts to +36 GeV. Our result, together with all other known
corrections is given in the form of a precise fitting formula to be used in the
global fit to the electroweak data.


title: Bound States in the LFD Yukawa Model

abstract:
  Our purpose is to calculate relativistic bound states in a quantum filed
theoretical approach. We work in the Yukawa model and first calculate the
bound-state equation in the ladder approximation. We discuss why this is not a
complete treatment and what possibilities there are to extend this equation.


title: What Will LC Tell Us on Top/QCD ?

abstract:
  Current status of Top/QCD studies at linear colliders (LC) is briefly viewed,
classifying topics into two categories: those within the standard model and
those beyond the standard model.