title: See-saw fermion masses in an SO(10) GUT

abstract:
  In this work we study an SO(10) GUT model with minimum Higgs representations
belonging only to the 210 and 16 dimensional representations of SO(10). We add
a singlet fermion S in addition to the usual 16 dimensional representation
containing quarks and leptons. There are no Higgs bi-doublets and so charged
fermion masses come from one-loop corrections. Consequently all the fermion
masses, Dirac and Majorana, are of the see-saw type. We minimize the Higgs
potential and show how the left-right symmetry is broken in our model where it
is assumed that a D-parity odd Higgs field gets a vacuum expectation value at
the grand unification scale. From the renormalization group equations we infer
that in our model unification happens at 10^{15} GeV and left-right symmetry
can be extended up to some values just above 10^{11} GeV. The Yukawa sector of
our model is completely different from most of the standard grand unified
theories and we explicitly show how the Yukawa sector will look like in the
different phases and briefly comment on the running of the top quark mass. We
end with a brief analysis of lepton number asymmetry generated from the
interactions in our model.


title: The Construction of Gauge-Links in Arbitrary Hard Processes

abstract:
  Transverse momentum dependent parton distribution and fragmentation functions
are described by hadronic matrix elements of bilocal products of field
operators off the light-cone. These bilocal products contain gauge-links, as
required by gauge-invariance. The gauge-links are path-ordered exponentials
connecting the field operators along a certain integration path. This
integration path is process-dependent, depending specifically on the
short-distance partonic subprocess. In this paper we present the technical
details needed in the calculation of the gauge-links and a calculational scheme
is provided to obtain the gauge-invariant distribution and fragmentation
correlators corresponding to a given partonic subprocess.


title: Color Superconducting Neutral Matter

abstract:
  We describe the effects of the strange quark mass and of the color and
electric neutrality on the superconducing phases of QCD.


title:
Model-independent Study on Magnetic Dipole Transition in Heavy
  Quarkonium

abstract:
  Some new results on magnetic dipole (M1) transitions in heavy quarkonium from
nonrelativistic effective field theories of QCD are briefly reported. This
model-independent approach not only facilitates a systematic and lucid way to
investigate the relativistic corrections, it also clarifies some inconsistent
treatment in previous potential model approach. The impact of our formalism on
J/Psi -> eta_c gamma, Upsilon(Upsilon') -> eta_b gamma and h_c -> chi_{c0}
gamma are discussed.


title: Braneworld cosmology: sneutrino inflation and leptogenesis

abstract:
  Modifications to the Friedmann equation in brane cosmology can have important
implications for early universe phenomena such as inflation and the generation
of the baryon asymmetry. In the framework of braneworld cosmology, we discuss a
mechanism for baryogenesis via leptogenesis in the supersymmetric context,
where the sneutrino is responsible for both inflation and the generation of the
baryon asymmetry in the universe.


title:
Associated tW production at LHC: a complete calculation of electroweak
  supersymmetric effects at one loop

abstract:
  We compute, in the MSSM framework, the total electroweak contributions at one
loop for the process pp -> tW+X, initiated by the parton process bg -> tW. The
supersymmetric effect is analyzed for various choices of the SUSY benchmark
points. Choosing realistic unpolarized and polarized experimental quantities,
we show the size of the various effects and discuss their dependence on the
MSSM parameters.


title: On exotic hybrid meson production in gamma* gamma collisions

abstract:
  We present a theoretical study of exotic hybrid meson (JPC=1-+) production in
photon-photon collisions where one of the photons is deeply virtual, including
twist 2 and twist 3 contributions. We calculate the cross section of this
process which turns out to be large enough to imply sizeable counting rates in
the present high luminosity electron-positron colliders. We emphasize
theimportance of the pi eta decay channel for the detection of the hybrid meson
candidate pi_1(1400) and calculate the cross section and the angular
distribution for pi eta pair production in the unpolarized case. This angular
distribution is a useful tool for disentangling the hybrid meson signal from
the background. Finally, we calculate the single spin asymmetry associated with
one initial longitudinally polarized lepton.


title: Virtual meson cloud of the nucleon and generalized parton distributions

abstract:
  We present the general formalism required to derive generalized parton
distributions within a convolution model where the bare nucleon is dressed by
its virtual meson cloud. In the one-meson approximation the Fock states of the
physical nucleon are expanded in a series involving a bare nucleon and
two-particle, meson-baryon, states. The baryon is assumed here to be either a
nucleon or a $\Delta$ described within the constituent quark model in terms of
three valence quarks; correspondingly, the meson, assumed to be a pion, is
described as a quark-antiquark pair. Explicit expressions for the unpolarized
generalized parton distributions are obtained and evaluated in different
kinematics.


title: Locked Quintessence and Cold Dark Matter

abstract:
  A supersymmetric hybrid potential model with low energy supersymmetry
breaking scale ($ M_{S}\sim 1-10 Tev$) is presented for both dark matter and
dark energy. Cold dark matter is associated with a light modulus field ($\sim
10-100 Mev$) undergoing coherent oscillations around a saddle point false
vacuum with the presently observed energy density ($\rho_{0} \sim 10^{-12}
eV^{4}$). The latter is generated by its coupling to a light dark energy scalar
field ($ \sim 10^{-18} eV $) which is trapped at the origin ("locked
quintessence"). Through naturally attained initial conditions the model is
consistent with cosmic coincidence reproducing LCDM cosmology. An exit from the
cosmic acceleration phase is estimated to occur within some eight Hubble times.


title: Dense Quark Matter in a Magnetic Field

abstract:
  We explore the effects of an applied strong external magnetic field in the
structure and magnitude of the color superconducting diquark condensate of a
three massless flavor theory. The long-range component of the B field that
penetrates the superconductor enhances the condensates formed by quarks charged
with respect to this electromagnetic field.


title:
Threshold Resummation Effects in Direct Top Quark Production at Hadron
  Colliders

abstract:
  We investigate the threshold-enhanced QCD corrections to the cross sections
for direct top quark productions induced by model-independent flavor changing
neutral current couplings at hadron colliders. We use the soft-collinear
effective theory to describe the incoming massless partons and use the heavy
quark effective theory to treat the top quark. Then we construct the flavor
changing operator based on the above effective theories, and resum the large
logarithms near threshold arising from soft gluon emission. Our results show
that the resummed QCD corrections further enhance the next-to-leading order
cross sections significantly. Moreover, the resummation effects vastly reduce
the dependence of the cross sections on the renormalization and factorization
scales, especially in cases where the next-to-leading order results behave
worse than the leading order results. Our results are more sensitive to the new
physics effects. If signals of direct top quark production are found in future
experiments, it is more appropriate to use our results as the theoretical
inputs for extracting the anomalous couplings.


title: Progress in computing inclusive B decay spectra

abstract:
  We review the progress in the QCD calculation of inclusive decay spectra. It
was recently shown that the inherent infrared finiteness of inclusive spectra
extends beyond the level of logarithms. Dressed Gluon Exponentiation makes
practical use of this property by computing the Sudakov exponent as a Borel
sum. Based on renormalon analysis, infrared sensitivity in the exponent is
reflected in power corrections that are inversely proportional to the third
power of the mass. Therefore, the parametric enhancement of non-perturbative
corrections near the phase--space boundary is effective only in a small region.
Consequently, the on-shell decay spectrum provides a good approximation to the
meson decay. In particular, it facilitates a precise determination of V_ub from
present measurements of inclusive charmless semileptonic widths without
involving a non-perturbative ``shape function''.


title:
Two-Photon Effects in Lepton-AntiLepton Pair Photoproduction from a
  Nucleon Target using Real Photons

abstract:
  We consider the production of a lepton-antilepton pair by real photons off a
hadronic target. The interference of one and two photon exchange amplitudes
leads to a charge asymmetry term that may be calculated explicitly in the
large-t limit in terms of hadronic distribution amplitudes. A rather compact
expression emerges for the leading order asymmetry at fixed angle in the
centre-of-mass of the lepton pair. The magnitude appears sizeable and is
approximately independent of the pair mass in the asymptotic limit.


title: Z' signal from the LEP2 data

abstract:
  The many-parametric fit of the LEP2 data on e^+e^-\to e^+e^-, \mu^+\mu^-,
\tau^+\tau^- processes is performed to estimate signals of the Abelian Z'-boson
beyond the standard model. The model-independent relations between the Z'
couplings to the standard model particles allow to describe the Z' effects in
lepton processes by 4 independent parameters. No signal is found by the
complete LEP2 data set, and the 1.3\sigma signal is detected by the fit of the
backward bins. The Z' couplings to the vector and axial-vector lepton currents
are constrained. The comparisons with the one-parameter fits and with the LEP1
experiments are performed.


title:
Polarization Buildup of Stored Protons and Antiprotons: Filtex Result
  and Implications for Pax at Fair

abstract:
  The spin filtering by a multiple passage of a stored beam through a polarized
internal gas target is a unique possibility of polarizing high luminosity beam
of antiprotons to a high degree of polarization. Apart from the polarization by
the spin-dependent transmission, a unique geometrical feature of spin filtering
in storage rings is a scattering of stored particles within the ring
\cite{Meyer}. A rotation of the spin in the scattering process affects the
polarization buildup. We report here a fully quantum-mechanical evolution
equation for the spin-density matrix of a stored beam which incorporates the
scattering within the ring. We show how dramatically the interplay of the
transmission and scattering within the ring changes from polarized electrons to
polarized protons in the atomic target. After discussions of the FILTEX results
on filtering of stored protons \cite{FILTEX}, we comment on the strategy of
spin filtering of antiprotons for the PAX experiment at GSI FAIR \cite{PAX-TP}.


title:
Renormalization Group Improved Sum Rule Analysis for the Bottom Quark
  Mass

abstract:
  We study the effect of resumming large logarithms in the determination of the
bottom quark mass through a non-relativistic sum rule analysis. Our result is
complete at next-to-leading-logarithmic accuracy and includes some known
contributions at next-to-next-to-leading logarithmic accuracy. Compared to
finite order computations, the reliability of the theoretical evaluation is
greatly improved, resulting in a substantially reduced scale dependence and a
faster convergent perturbative series. This allows us to significantly improve
over previous determinations of the $\MS$ bottom quark mass, $\bar{m}_b$, from
non-relativistic sum rules. Our final figure reads
$\bar{m}_b(\bar{m}_b)=4.19\pm 0.06$ GeV.


title: Resonances from Two Universal Extra Dimensions

abstract:
  Standard model gauge bosons propagating in two universal extra dimensions
give rise to heavy spin-1 and spin-0 particles. The lightest of these, carrying
Kaluza-Klein numbers (1,0), may be produced only in pairs at colliders, whereas
the (1,1) modes, which are heavier by a factor of \sqrt{2}, may be singly
produced. We show that the cascade decays of (1,1) particles generate a series
of closely-spaced narrow resonances in the t\bar{t} invariant mass
distribution. At the Tevatron, s-channel production of (1,1) gluons and
electroweak bosons will be sensitive to t\bar{t} resonances up to masses in the
0.5 - 0.7 TeV range. Searches at the LHC for resonances originating from
several higher-level modes will further test the existence of two universal
extra dimensions.


title:
Charge Symmetry Breaking in Pion-Nucleon Coupling Constants Induced by
  Axial Anomaly

abstract:
  The contribution of axial anomaly to charge symmetry breaking in pion-nucleon
coupling constants is calculated within instanton model for QCD vacuum. It has
been demonstrated that the contribution is large and allows to explain
Nolen-Schiffer anomaly.


title:
Nuclear parton distribution functions and energy loss effect in the
  Drell-Yan reaction off nuclei

abstract:
  The energy loss effect in nuclear matter is another nuclear effect apart from
the nuclear effects on the parton distribution as in deep inelastic scattering
process. The quark energy loss can be measured best by the nuclear dependence
of the high energy nuclear Drell-Yan process. By means of two typical kinds of
quark energy loss parametrization and the different sets of nuclear parton
distribution functions, we present a analysis of the E866 experiments on the
nuclear dependence of Drell-Yan lepton pair production resulting from the
bombardment of Be, Fe and W targets by 800GeV protons at Fermilab. It is found
that the quark energy loss in cold nuclei is strongly dependent on the used
nuclear parton distribution functions. The further prospects of using
relatively low energy proton incident on nuclear targets are presented by
combining the quark energy loss rate determined from a fit to the E866
nuclear-dependent ratios versus $x_1$, with the nuclear parton distribution
functions given from lA deep inelastic scattering (DIS) data. The experimental
study of the relatively low energy nuclear Drell-Yan process can give valuable
insight in the enengy loss of fast quark propagating a cold nuclei and help to
pin down nuclear parton distributions functions.


title: QCD in the Regge limit: from gluon Reggeization to physical amplitudes

abstract:
  This paper is a brief survey of the Balitskii-Fadin-Kuraev-Lipatov (BFKL)
approach for the description of hard or semi-hard processes in the so-called
Regge limit of perturbative QCD. The starting point is a fundamental property
of perturbative QCD, the gluon Reggeization. This property, combined with
s-channel unitarity, allows to predict the growth in energy of the amplitude of
hard or semi-hard processes with exchange of vacuum quantum numbers in the
$t$-channel. When also the so-called impact factors of the colliding particles
are known, then not only the behavior with the energy, but the complete
amplitude can be determined. This was recently done, for the first time with
next-to-leading order accuracy and for a process with colorless external
particles, in the case of the electroproduction of two light vector mesons.


title:
Angular Power Spectrum and Dilatonic Inflation in Modular-Invariant
  Supergravity

abstract:
  The angular power spectrum is investigated in the model of supergravity,
incorporating the target-space duality and the non-perturbative gaugino
condensation in the hidden sector. The inflation and supersymmetry breaking
occur at once by the interplay between the dilaton field as inflaton and the
condensate gauge-singlet field. The model satisfies the slow-roll condition
which solves the \eta-problem. When the particle rolls down along the minimized
trajectory of the potential at a duality invariant fixed point T=1, we can
obtain the e-fold value \sim 57. And then the cosmological parameters obtained
from our model well match with the recent WMAP data combined with other
experiments. The TT and TE angular power spectra also show that our model is
compatible with the data for l > 20. However, the best fit value of \tau in our
model is smaller than that of the \Lambda CDM model. These results suggest
that, among supergravity models of inflation, the modular-invariant
supergravity seems to open a hope to construct the realistic theory of
particles and cosmology.


title: SUSY Higgs boson flavor-changing neutral currents at the LHC

abstract:
  We compute and analyze the Flavor-Changing Neutral Current (FCNC)
interactions of Minimal Supersymmetric Standard Model Higgs bosons (h = h0, H0,
A0) with heavy quarks (top and bottom), focusing on the strongly-interacting
sector. We correlate the Higgs bosons production cross-section at the LHC with
the FCNC decay branching ratios and find the maximum allowed values of the
production rates, sigma(pp -> h -> qq') = sigma(pp -> h) x B(h -> qq') (qq'= tc
or bs) after taking into account limits from low energy data on flavor-changing
interactions. We single out the top channel, with a maximum production rate of
sigma^max(pp -> h -> tc) =~ 10^-3 - 10^-2 pb, as the most promising FCNC
channel to be detected at the LHC.


title: The MC@NLO 3.2 Event Generator

abstract:
  This is the user's manual of MC@NLO 3.2. This package is a practical
implementation, based upon the HERWIG event generator, of the MC@NLO formalism,
which allows one to incorporate NLO QCD matrix elements consistently into a
parton shower framework. Processes available in this version include the
hadroproduction of single vector and Higgs bosons, vector boson pairs, heavy
quark pairs, single top, lepton pairs, and Higgs bosons in association with a W
or Z. Spin correlations in decays are included for all processes except ttbar,
single-t, ZZ, and WZ production. This document is self-contained, but we
emphasise the main differences with respect to previous versions.


title:
Diquarks and antiquarks in exotics: a menage a trois and a menage a
  quatre

abstract:
  A menage a trois is very different from an ordinary family. Similarly, exotic
hadrons with both qq and qbar q pairs have important color-space correlations
that are completely absent in ordinary mesons and baryons. The presence of both
types of pairs requires attention to the basic QCD physics that the q qbar
interaction is much stronger than the qq interaction. This new physics in
multiquark systems produces color structures totally different from those of
normal hadrons, for example the ud system is utterly unlike the ud diquark in
the uds Lambda baryon. The color-space correlations produce unusual
experimental properties in tetraquarks with heavy quark pairs which may be
relevant for newly discovered mesons like the X(3872) resonance. Tetraquark
masses can be below the two-meson threshold for sufficiently high quark masses.
A simple model calculation shows the b q bbar ubar and b q cbar qbar
tetraquarks below the B Bbar and B Dbar thresholds. Some of these states have
exotic electric charge and their decays might have striking signatures
involving monoenergetic photons and/or pions.


title: Extended Derivative Dispersion Relations

abstract:
  It is shown that, for a wide class of functions with physical interest as
forward scattering amplitudes, integral dispersion relations can be replaced by
derivative forms without any high-energy approximation. The applicability of
these extended derivative relations, in the investigation of forward
proton-proton and antiproton-proton elastic scattering, is exemplified by means
of a Pomeron-Reggeon model with totally nondegenerate trajectories.


title:
Colour Connection and Diquark Fragmentation in e^+e^- \to c \bar c q
  \bar q \to h's Process

abstract:
  The hadronization effects induced by different colour connections of
$c\bar{c}q\bar{q}$ system in $e^+e^-$ annihilation are investigated by a toy
model where diquark fragmentation is employed based on Pythia. It is found that
the correlations between the charm baryons and charm antibaryons produced via
diquark pair fragmentation are much stronger, and their momentum spectra are
harder than those from the standard colour connection in Pythia.


title:
Pion Chiral Symmetry Breaking in the Quark-Level Linear Sigma Model and
  Chiral Perturbation Theory

abstract:
  Chiral symmetry breaking (ChSB) is reviewed to some extent within the
quark-level-linear-sigma-model (QLL$\sigma$M) theory and standard chiral
perturbation theory (ChPT). It is shown, on the basis of several examples
related to the pion, as a well-known Goldstone boson of chiral symmetry
breaking, that even the non-unitarized QLL$\sigma$M approach accounts, to a
good approximation, for a rather simple, self-consistent, linear, and very
predictive description of Nature. On the other hand, ChPT -- even when
unitarized -- provides a highly distorted, nonlinear, hardly predictive picture
of Nature, which fits experiment only at the price of a lot of parameters, and
requires a great deal of unnecessary theoretical effort. As the origin of this
distortion, we identify the fact that ChPT, reflecting only direct ChSB by
nonvanishing, current-quark-mass values, does not -- contrary to Quantum
Chromodynamics (QCD) and the QLL$\sigma$M -- contain any mechanism for the
spontaneous generation of the dynamical component of the constituent quark
mass. This leads to a very peculiar picture of Nature, since the strange
current quark mass has to compensate for the absence of nonstrange dynamical
quark masses. We thus conclude that standard ChPT -- contrary to common wisdom
-- is unlikely to be the low-energy limit of QCD. On the contrary, a chiral
perturbation theory derived from the QLL$\sigma$M, presumably being the true
low-energy limit of QCD, is expected instead to provide a distortion-free
description of Nature, which is based on the heavy standard-model Higgs boson
as well as light scalar mesons, as the source of spontaneous generation of
current and dynamical quark masses, respectively.


title: The $B_K$ Kaon Parameter in the Chiral Limit

abstract:
  We introduce four-point functions in the hadronic ladder resummation approach
to large $N_c$ QCD Green functions. We determine the relevant one to calculate
the $B_K$ kaon parameter in the chiral limit. This four-point function contains
both the large momenta QCD OPE and the small momenta ChPT at NLO limits,
analytically. We get $\hat B_K^\chi = 0.38 \pm 0.15$. We also give the ChPT
result at NLO for the relevant four-point function to calculate $B_K$ outside
the chiral limit, while the leading QCD OPE is the same as the chiral limit
one.


title:
What Fraction of Boron-8 Solar Neutrinos arrive at the Earth as a nu_2
  mass eigenstate?

abstract:
  We calculate the fraction of B^8 solar neutrinos that arrive at the Earth as
a nu_2 mass eigenstate as a function of the neutrino energy. Weighting this
fraction with the B^8 neutrino energy spectrum and the energy dependence of the
cross section for the charged current interaction on deuteron with a threshold
on the kinetic energy of the recoil electrons of 5.5 MeV, we find that the
integrated weighted fraction of nu_2's to be 91 \pm 2 % at the 95% CL. This
energy weighting procedure corresponds to the charged current response of the
Sudbury Neutrino Observatory (SNO). We have used SNO's current best fit values
for the solar mass squared difference and the mixing angle, obtained by
combining the data from all solar neutrino experiments and the reactor data
from KamLAND. The uncertainty on the nu_2 fraction comes primarily from the
uncertainty on the solar delta m^2 rather than from the uncertainty on the
solar mixing angle or the Standard Solar Model. Similar results for the
Super-Kamiokande experiment are also given. We extend this analysis to three
neutrinos and discuss how to extract the modulus of the Maki-Nakagawa-Sakata
mixing matrix element U_{e2} as well as place a lower bound on the electron
number density in the solar B^8 neutrino production region.


title:
Space-time structure of new physics with polarized beams at the linear
  collider

abstract:
  We approach the issue of the discovery of new physics at high energies
associated with the proposed International Linear Collider in the presence of
longitudinal as well as transverse electron and positron beam polarization. We
determine the beam polarization dependence and the angular distribution of a
particle of arbitrary spin in a one-particle inclusive final state produced in
e+ e- collisions through the interference of gamma or Z amplitude with the
amplitude from new interactions having arbitrary space-time structure. We thus
extend the results of Dass and Ross proposed at the time of the discovery of
neutral currents, to beyond the standard model currents. We also extend the
case of e+ e- annihilation in the s-channel to the production of bosons due to
t- and u-channel processes. Our work provides an approach to model-independent
determination of the space-time structure of beyond the standard model
interactions. We briefly discuss applications of the framework to popular
extensions of the standard model, and demonstrate that our framework is general
enough to account for certain results in the minimal supersymmetric standard
model.


title: Minimal Subtraction vs. Physical Factorisation Schemes in Small-x QCD

abstract:
  We investigate the relationship of ``physical'' parton densities defined by
kt-factorisation, to those in the minimal subtraction scheme, by comparing
their small-x behaviour. We first summarize recent results on the above scheme
change derived from the BFKL equation at NLx level, and we then propose a
simple extension to the renormalisation-group improved (RGI) equation. In this
way we are able the examine the difference between resummed gluon distributions
in the Q_0 and MSbar schemes and also to show MSbar scheme resummed results for
P_gg and approximate ones for P_qg. We find that, due to the stability of the
RGI approach, small-x resummation effects are not much affected by the
scheme-change in the gluon channel, while they are relatively more sensitive
for the quark-gluon mixing.


title:
High energy inelastic electron hadron scattering, in peripheral
  kinematics. Sum rules for hadron form factors

abstract:
  Relations between differential cross section for inelastic scattering of
electrons on hadrons and hadron form factors (sum rules) are derived on the
basis of analytical properties of heavy photon forward Compton scattering on
hadrons. Sum rules relating the slope of form-factors at zero momentum transfer
and anomalous magnetic moments of hadrons with some integrals on
photo-production on a hadrons is obtained as well. To provide the convergence
of these integrals we construct differences of individual sum rules for
different hadrons. Universal interaction of Pomeron with nucleons is assumed.
We derive the explicit formulae for processes of electro-production on proton
and light isobar nuclei. Sudakov's parametrization of momenta, for peripheral
kinematics relevant here, is used. The light-cone form of differential cross
sections is also discussed. The accuracy of sum rules estimated in frames of
point-like hadrons and it is shown to be at the level of precision achievable
by experiments. Suggestions and predictions for future experiments are also
given.


abstract:
  Rescattering effects of baryon and antibaryon in heavy quarkonium decays are
investigated by studying their angular distributions. The rescattering
amplitudes are phenomenologically evaluated by modeling the intermediate range
interaction as a $\sigma$ or pion meson exchange between $\qqbar$ quarks. The
results show that the rescattering effects play an important role in
determination of the angular distribution in heavy quarkonium decays.
Especially, for $J/psi$ and $\psi'$ decays into $\Lambda \bar \Lambda$,
$\Sigma^0\bar \Sigma^0$ and $\Xi^-\bar \Xi^+$ the angular distribution
parameters could turn to be negative values in the limit of helicity
conservation. These results provide us a possible explanation for understanding
the negative sign of the angular distribution parameter measured for $J/psi
\to\Sigma^0\bar\Sigma^0$, namely, {\it it might come from the baryonic
SU(3)$_F$ symmetry breaking by incorporating rescattering effects


title:
Analysis of charmonium production at fixed-target experiments in the
  NRQCD approach

abstract:
  We present an analysis of the existing data on charmonium hadro-production
based on non-relativistic QCD (NRQCD) calculations at the next-to-leading order
(NLO). All the data on J/psi and psi' production in fixed-target experiments
and on pp collisions at low energy are included. We find that the amount of
color octet contribution needed to describe the data is about 1/10 of that
found at the Tevatron.


title: Study of QGP signatures with the phi->K+K- signal in Pb-Pb ALICE events

abstract:
  The phi->K+K- decay channel in Pb-Pb collisions at LHC is studied through a
full simulation of the ALICE detector. The study focuses on possible signatures
in this channel of quark-gluon plasma (QGP) formation. On a basis of 10^6
collisions at high centrality some proposed QGP signatures are clearly visible
both in K+K- invariant mass and transverse mass distributions. The high
significance of this observation appears to reside heavily on the use of the
TOF (Time Of Flight) system of ALICE in addition to its central tracking
detectors.


title:
General helicity formalism for Single and Double Spin Asymmetries in p p
  --> pion + X

abstract:
  We consider within a generalized QCD factorization approach, the high energy
inclusive polarized process p p --> pion + X, including all intrinsic partonic
motions. Several new spin and k_T-dependent soft functions appear and
contribute to cross sections and spin asymmetries. We present here formal
expressions for transverse single spin asymmetries and double longitudinal
ones. The transverse single spin asymmetry, A_N, is considered in detail, and
all contributions are evaluated numerically. It is shown that the azimuthal
phase integrations strongly suppress most contributions, leaving at work mainly
the Sivers effect.


title:
Target normal spin asymmetry and charge asymmetry for $e\mu$ elastic
  scattering and the crossed processes

abstract:
  Two kinds of asymmetry arise from the interference of the Born amplitude and
the box-type amplitude corresponding to two virtual photons exchange, namely
charge-odd and one spin asymmetries. In case of unpolarized particles the
charge-odd correlation is calculated. It can be measured in combination of
electron muon and positron muon scattering experiments. The forward-backward
asymmetry is the corresponding quantity which can be measured for the crossed
processes. In the case of polarized muon the one-spin asymmetry for
annihilation and scattering channels has been calculated. The additional
structure function arising from the interference is shown to suffer from
infrared divergencies. The background due to electroweak interaction is
discussed.


title: Heavy-Quark Form Factors and Threshold Cross Section at O(\alpha_S^2)

abstract:
  During the last year, analytic expressions for the two-loop QCD corrections
to the form factors for the vector, axial-vector, scalar and pseudo-scalar
vertices involving a pair of heavy quarks, $Q \bar{Q}$, were calculated. The
results are valid for arbitrary momentum transfer and mass of the heavy quarks.
These form factors have a number of applications, including anomalous
couplings, the $e^{+}e^{-} \to Q \bar Q$ cross section, and the
forward-backward asymmetry of heavy quarks. Here the $Q {\bar Q}$ threshold
cross section is presented with some new second order axial vector
contributions.


title: On the Mass Eigenstate Purity of B^8 Solar Neutrinos

abstract:
  We give a brief report on our recent paper, hep-ph/0601198, in which we
calculate the nu_2 mass eigenstate purity of B^8 solar neutrinos as 91 +/- 2 %.


title:
Particle production in field theories coupled to strong external sources
  I. Formalism and main results

abstract:
  We develop a formalism for particle production in a field theory coupled to a
strong time-dependent external source. An example of such a theory is the Color
Glass Condensate. We derive a formula, in terms of cut vacuum-vacuum Feynman
graphs, for the probability of producing a given number of particles. This
formula is valid to all orders in the coupling constant. The distribution of
multiplicities is non--Poissonian, even in the classical approximation. We
investigate an alternative method of calculating the mean multiplicity. At
leading order, the average multiplicity can be expressed in terms of retarded
solutions of classical equations of motion. We demonstrate that the average
multiplicity at {\it next-to-leading order} can be formulated as an initial
value problem by solving equations of motion for small fluctuation fields with
retarded boundary conditions. The variance of the distribution can be
calculated in a similar fashion. Our formalism therefore provides a framework
to compute from first principles particle production in proton-nucleus and
nucleus-nucleus collisions beyond leading order in the coupling constant and to
all orders in the source density. We also provide a transparent interpretation
(in conventional field theory language) of the well known
Abramovsky-Gribov-Kancheli (AGK) cancellations. Explicit connections are made
between the framework for multi-particle production developed here and the
framework of Reggeon field theory.


title:
New analyticity constraints on the high energy behavior of hadron-hadron
  cross sections

abstract:
  We here comment on a series of recent papers by Igi and Ishida[K. Igi and M.
Ishida, Phys. Lett B 622, 286 (2005)] and Block and Halzen[M. M. Block and F.
Halzen, Phys. Rev D 72, 036006 (2005)] that fit high energy $pp$ and $\bar pp$
cross section and $\rho$-value data, where $\rho$ is the ratio of the real to
the imaginary portion of the forward scattering amplitude. These authors used
Finite Energy Sum Rules and analyticity consistency conditions, respectively,
to constrain the asymptotic behavior of hadron cross sections by anchoring
their high energy asymptotic amplitudes--even under crossing--to low energy
experimental data. Using analyticity, we here show that i) the two apparently
very different approaches are in fact equivalent, ii) that these analyticity
constraints can be extended to give new constraints, and iii) that these
constraints can be extended to crossing odd amplitudes. We also apply these
extensions to photoproduction. A new interpretation of duality is given.


title: P-Wave Charmed-Strange Mesons

abstract:
  We examine charmed-strange mesons within the framework of the constituent
quark model, focusing on the states with L=1. We are particularly interested in
the mixing of two spin-states that are involved in $D_{s1}(2536)$ and the
recently discovered $D_{sJ}(2460)$. We assume that these two mesons form a pair
of states with J=1. These spin-states are mixed by a type of the spin-orbit
interaction that violates the total-spin conservation. Without assuming
explicit forms for the interactions as functions of the interquark distance, we
relate the matrix elements of all relevant spin-dependent interactions to the
mixing angle and the observed masses of the L=1 quartet. We find that the
spin-spin interaction, among various types of the spin-dependent interactions,
plays a particularly interesting role in determining the spin structure of
$D_{s1}(2536)$ and $D_{sJ}(2460)$.


title: Modifications to the Properties of the Higgs Boson

abstract:
  We explore the impact of new SU(3)XSU(2)XU(1) invariant interactions
characterized by a scale of order a TeV on Higgs boson properties. The Higgs
production rate and branching ratios can be very different from their standard
model values. We also discuss the possibility that these new interactions
contribute to acceptable unification of the gauge couplings.


title: Les Houches Lectures on Warped Models and Holography

abstract:
  The theoretical tools required to construct models in warped extra dimensions
are presented. This includes how to localise zero modes in the warped bulk and
how to obtain the holographic interpretation using the AdS/CFT correspondence.
Several models formulated in warped space are then discussed including
nonsupersymmetric and supersymmetric theories as well as their dual
interpretation. Finally it is shown how grand unification occurs in warped
models.


title: Two body B decays with isosinglet final states in SCET

abstract:
  Expressions for decay amplitudes of B0, B- and Bs mesons to two light
pseudoscalar or vector mesons, including isosinglet mesons eta, eta', omega,
phi, are obtained using Soft Collinear Effective Theory at LO in 1/mb. These
are then used to predict unmeasured branching ratios, direct and indirect CP
asymmetries in B0, B- and Bs decays into two light pseudoscalars, following a
determination of nonperturbative SCET parameters from existing data using a
chi-squared fit. A separate discussion of indirect CP asymmetries in penguin
dominated B0 --> eta' K(S/L), pi0 K(S/L) decays is given.


title: Spin-Flip Interactions and the Puzzle of psi's Polarization at Tevatron

abstract:
  Nonrelativistic QCD provides a systematic approach for inclusive decays and
productions of a quarkonium. By taking color-octet components into account, the
approach can explain the $\psi'$-anomaly at Tevatron, where the measured
production rate at large transverse momentum $p_\perp$ is in order of magnitude
larger than the predicted with color-singlet components only. With the approach
one can predict that the produced $J/\psi$ and $\psi'$ at large $p_\perp$ will
be transversely polarized. But the prediction fails in confronting with
experimental measurements and this generates a puzzle. We examine the role of
spin-flip interactions in the spin density matrix of the transition of a
color-octet charm quark pair into $J/\psi$ and $\psi'$. These interactions will
introduce new nonperturbative parameters in the spin density matrix. Our result
shows that the impact of the interactions is always to dilute the polarization
and can be very significant. Taking the impact into account, predictions for
the polarization are more close to the measured than the previous predicted.
The same can also be expected for the polarization of $J/\psi$.


title: Generalized Sigma Model Description of the Light J=0 Mesons

abstract:
  Within a linear sigma model framework, possible mixing between two chiral
nonets (a two quark nonet, and a four quark nonet) below 2 GeV is studied.
Incorporating the U(1)$_A$ behavior of the underlying QCD, and working in the
isospin invariant limit, the mass spectra of the I=0, $I=1/2$ and I=1
pseudoscalars, and the $I=1/2$ scalars are studied, and estimates of their
quark content are presented. It is found, as expected, that the ordinary and
the excited pseudoscalars generally have much less two and four quark
admixtures compared to the respective scalars. As by-products, several
quantities such as the four quark vacuum condensate, and the decay constant of
excited states are predicted.


title: ILC: Physics Scenarios

abstract:
  Experiments in the energy range from the scale of electroweak symmetry
breaking to the TeV scale are expected to be crucial for unraveling the
microscopic structure of matter and forces. The high precision which should be
achieved in experiments at lepton colliders, is a necessary ingredient for
providing a comprehensive picture of the mechanism breaking the electroweak
symmetries and generating mass, the unification of forces, involving most
likely supersymmetry, and the structure of space-time at small distances. In
addition, clarifying the nature of the particles which build up cold dark
matter in the universe, needs a lepton collider to match the high experimental
precision which will be reached in cosmology experiments.


title:
Single top-quark production by direct supersymmetric flavor-changing
  neutral-current interactions at the LHC

abstract:
  Production of (electrically neutral) heavy-quark pairs, such as t{\bar c} and
{\bar t}c, is extremely suppressed in the SM. In supersymmetric (SUSY)
theories, such as the MSSM, the number of these events can be significantly
enhanced thanks (mainly) to the FCNC couplings of gluinos. We compute the
efficiency of this mechanism for FCNC production of heavy quarks at the LHC. We
find that \sigma (pp\to t\bar{c}+\bar{t}c) can reach 1 pb, and therefore one
can expect up to 10^{5} events per 100 fb^{-1} of integrated luminosity (with
no counterpart in the SM). Their detection would be instant evidence of new
physics, and could be a strong indication of underlying SUSY dynamics.


title:
Weak doubly special relativity and ultra-high energy cosmic ray
  experiments

abstract:
  Should projects of space experiments on ultra-high energy cosmic rays be
supported, whatever AUGER results will turn out to be? We claim that this is
indeed the case. It is now widely admitted that models of Lorentz symmetry
violation (LSV) at the Planck scale based on power-like extrapolations down to
cosmic-ray scales and able to account for a possible absence of the
Greisen-Zatsepin-Kuzmin cutoff exist and require the existence of a privileged
inertial rest frame, as we proposed in 1997 (paper physics/9704017 and
subsequent work). The favoured energy dependence of the LSV parameter will then
be quadratic rather than linear. This approach (weak doubly special relativity,
WDSR) is different from the version of doubly special relativity defended by
several authors, where the laws of Physics are required to be exactly identical
in all inertial reference frames (strong doubly special relativity, SDSR). To
date, WDSR patterns based on a deformation of special relativity with a
privileged (vacuum) rest frame are the only clear and consistent candidate to
explain a possible absence of the GZK cutoff invoking deviations from standard
relativity. It is also to be emphasized, as in hep-ph/0510361, that the usual
hypothesis of a power-like dependence of the LSV effective parameters not being
altered by any intermediate energy scale is not the only possible one.
Therefore, experiments sensitive to UHCR energies as high as possible become
necessary irrespective of AUGER results.


title:
Variational Worldline Approximation for the Relativistic Two-Body Bound
  State in a Scalar Model

abstract:
  We use the worldline representation of field theory together with a
variational approximation to determine the lowest bound state in the scalar
Wick-Cutkosky model where two equal-mass constituents interact via the exchange
of mesons. Self-energy and vertex corrections are included approximately in a
consistent way as well as crossed diagrams. Only vacuum-polarization effects of
the heavy particles are neglected. In a path integral description of an
appropriate current-current correlator an effective, retarded action is
obtained by integrating out the meson field. As in the polaron problem we
employ a quadratic trial action with variational functions to describe
retardation and binding effects through multiple meson exchange.The variational
equations for these functions are derived, discussed qualitatively and solved
numerically. We compare our results with the ones from traditional approaches
based on the Bethe-Salpeter equation and find an enhanced binding contrary to
some claims in the literature. For weak coupling this is worked out
analytically and compared with results from effective field theories. However,
the well-known instability of the model, which usually is ignored, now appears
at smaller coupling constants than in the one-body case and even when
self-energy and vertex corrections are turned off. This induced instability is
investigated analytically and the width of the bound state above the critical
coupling is estimated.


title: Two-photon physics

abstract:
  It is reviewed how Compton scattering sum rules relate low-energy nucleon
structure quantities to the nucleon excitation spectrum. In particular, the GDH
sum rule and recently proposed extensions of it will be discussed. These
extensions are sometimes more calculationally robust, which may be an advantage
when estimating the chiral extrapolations of lattice QCD results, such as for
anomalous magnetic moments. Subsequently, new developments in our description
of the nucleon excitation spectrum will be discussed, in particular a recently
developed chiral effective field theory framework for the
$\Delta(1232)$-resonance region. Within this framework, we discuss results on
$N$ and $\Delta$ masses, the $\gamma N \Delta$ transition and the $\Delta$
magnetic dipole moment.


title: Effective description of brane terms in extra dimensions

abstract:
  We study how theories defined in (extra-dimensional) spaces with localized
defects can be described perturbatively by effective field theories in which
the width of the defects vanishes. These effective theories must incorporate a
``classical'' renormalization, and we propose a renormalization prescription a
la dimensional regularization for codimension 1, which can be easily used in
phenomenological applications. As a check of the validity of this setting, we
compare some general predictions of the renormalized effective theory with
those obtained in a particular ultraviolet completion based on deconstruction.


title: Fixing the Solar Neutrino Parameters with Sterile Neutrinos

abstract:
  Neutrino mixing matrix appears to be close to bimaximal mixing, but for the
solar mixing angle which is definitively smaller than forty five degrees.
Whereas it seems quite easy to understand bimaximal mixing with the use of new
global symmetries, as in models using $L_e - L_\mu - L_\tau$, understanding the
about to eleven degrees of deviation in the observed solar angle seems less
simple. We suggest that such a deviation could be due to a light sterile
neutrino that mixes with the active sector. The mass scale needed to produce
the effect has to be smaller than atmospheric scale, and it would introduce a
new mass squared difference which should be smaller than the solar scale. We
present a toy model that exemplifies these features.


title: Spontaneous electro-weak symmetry breaking and cold dark matter

abstract:
  In the standard model, the weak gauge bosons and fermions obtain mass after
spontaneous electro-weak symmetry breaking, which is realized through one
fundamental scalar field, namely Higgs field. In this paper we study the
simplest scalar cold dark matter model in which the scalar cold dark matter
also obtains mass through interaction with the weak-doublet Higgs field, the
same way as those of weak gauge bosons and fermions. Our study shows that the
correct cold dark matter relic abundance within $3\sigma$ uncertainty ($ 0.093
< \Omega_{dm} h^2 < 0.129 $) and experimentally allowed Higgs boson mass
($114.4 \le m_h \le 208$ GeV) constrain the scalar dark matter mass within $48
\le m_S \le 78$ GeV. This result is in excellent agreement with that of W. de
Boer et.al. ($50 \sim 100$ GeV). Such kind of dark matter annihilation can
account for the observed gamma rays excess ($10\sigma$) at EGRET for energies
above 1 GeV in comparison with the expectations from conventional Galactic
models. We also investigate other phenomenological consequences of this model.
For example, the Higgs boson decays dominantly into scalar cold dark matter if
its mass lies within $48 \sim 64$ GeV.


title: Verifiable Radiative Seesaw Mechanism of Neutrino Mass and Dark Matter

abstract:
  A minimal extension of the Standard Model is proposed, where the observed
left-handed neutrinos obtain naturally small Majorana masses from a one-loop
radiative seesaw mechanism. This model has two candidates (one bosonic and one
fermionic) for the dark matter of the Universe. It has a very simple structure
and should be verifiable in forthcoming experiments at the Large Hadron
Collider.


title:
Hard diffraction at the LHC and the Tevatron using double pomeron
  exchange

abstract:
  We use a Monte Carlo implementation of recently developped models of
inclusive and exclusive diffractive $W$, top, Higgs and stop productions to
assess the sensitivity of the LHC experiments. We also discuss how the Tevatron
experiments could test the models and measure the gluon density in the pomeron,
which is needed to make precise predictions at the LHC.


title: Light-hadron electroproduction at next-to-leading order and implications

abstract:
  We review recent results on the inclusive electroproduction of light hadrons
at next-to-leading order in the parton model of quantum chromodynamics
implemented with fragmentation functions and present updated predictions for
HERA experiments based on the new AKK set. We also discuss phenomenological
implications of these results.


title: Recent results from the Tevatron

abstract:
  In these lectures, we describe some recent results from the D{\O}and CDF
experiments at the Tevatron.


title:
Neural network parametrization of the lepton energy spectrum in
  semileptonic B meson decays

abstract:
  We construct a parametrization of the lepton energy spectrum in inclusive
semileptonic decays of B mesons, based on the available experimental
information: moments of the spectrum with cuts, their errors and their
correlations, together with kinematical constraints. The result is obtained in
the form of a Monte Carlo sample of neural networks trained on replicas of the
experimental data, which represents the probability density in the space of
lepton energy spectra. This parametrization is then used to extract the b quark
mass m_b^{1S} in a way that theoretical uncertainties are minimized, for which
the value m_b^{1S}=4.84 \pm 0.14^{exp}\pm 0.05^{th} GeV is obtained.


title: Models for cosmic ray interactions

abstract:
  Contemporary models of hadronic interactions are reviewed. Basic
phenomenological approaches are compared, with an emphasizes on the predicted
air shower characteristics. Special attention is payed to the remaining
discrepancies between present hadronic MC generators and cosmic ray data.
Finally, future prospects concerning model improvements are discussed, in
particular, regarding the possibilities to discriminate between different
models on the basis of accelerator or cosmic ray measurements.


title: Majorana Neutrinos in Muon Decay

abstract:
  The normal muon decay $\mu^{+} \to e^{+}\nu_{e}\bar{\nu_{\mu}}$ is studied as
a tool to discriminate between the Dirac and Majorana type neutrinos. For the
purpose to do this, we propose a new parameterization in place of the Michel
parameters for the energy spectrum of $e^{+}$. The $\chi^2$-fitting is used by
noticing different energy spectra between the Dirac and Majorana neutrino
cases. We assume the interaction Hamiltonian which consists of the $V-A$ and
$V+A$ charged currents.


title: The sector decomposition approach to real radiation at NNLO

abstract:
  A method based on sector decomposition is briefly described which is suitable
for the calculation of the double real radiation part of e^+e^- to 3 jets at
next-to-next-to-leading order in a fully differential way.


title: New Bounds On The CKM Matrix From B -> K pi pi Dalitz Plot Analyses

abstract:
  We present a new technique to extract information on the Unitarity Triangle
from the study of B -> K pi pi Dalitz plots. Using the sensitivity of Dalitz
analyses to the absolute values and the phases of decay amplitudes and isospin
symmetry, we obtain a new constraint on the elements of the CKM matrix. We
discuss in detail the role of electroweak penguins and outline future
prospects.


title:
Electron-positron annihilation into four charged pions and the
  a_1-rho-pi Lagrangian

abstract:
  The excitation curve of e+e- annihilation into four charged pions in the
rho(770) region is calculated using three existing models with rho mesons and
pions in intermediate states supplemented by Feynman diagrams with the
a_1(1260)pi intermediate states. A two-term phenomenological Lagrangian of the
a_1-rho-pi interaction is used. The mixing angle is determined by fitting the
e+e- --> pi+pi-pi+pi- cross section data of the Novosibirsk CMD-2 collaboration
and also its combination with the low-energy part of the BaBar collaboration
data. It is shown that the inclusion of the a_1-pi intermediate states succeeds
in obtaining a good agreement with the data on both cross section and the rho^0
--> pi+pi-pi+pi- decay width. When moving to energies above 1 GeV, the
rho(1450) and rho(1700) resonances are taken into account to get excellent
agreement with the BaBar data over the full energy range up to 4.5 GeV.


title: Heavy-flavor photo- and electroproduction at NLO

abstract:
  We review one-particle inclusive production of heavy-flavored hadrons in a
framework which resums the large collinear logarithms through the evolution of
the FFs and PDFs and, at the same time, retains the full dependence on the
heavy-quark mass without additional theoretical assumptions. The main focus is
on the production of D^* mesons in deep inelastic electron--proton scattering
at HERA. We show results, neglecting for the time being the heavy-quark mass
terms, for deep inelastic D^* meson production at finite transverse momenta.
Work to implement this process in the above mentioned massive QCD framework is
in progress.


title: Very Special Relativity

abstract:
  By Very Special Relativity (VSR) we mean descriptions of nature whose
space-time symmetries are certain proper subgroups of the Poincar\'e group.
These subgroups contain space-time translations together with at least a
2-parameter subgroup of the Lorentz group isomorphic to that generated by
$K_{x}+J_{y}$ and $K_{y}-J_{x}$. We find that VSR implies special relativity
(SR) in the context of local quantum field theory or of CP conservation. Absent
both of these added hypotheses, VSR provides a simulacrum of SR for which most
of the consequences of Lorentz invariance remain wholly or essentially intact,
and for which many sensitive searches for departures from Lorentz invariance
must fail. Several feasible experiments are discussed for which
Lorentz-violating effects in VSR may be detectable.


title: Quantum corrections to the MSSM h^0 b b-bar vertex: Decoupling limit

abstract:
  We consider the leading one-loop Yukawa-coupling corrections to the h^0 b
b-bar coupling at O(m_t^2)in the MSSM in the decoupling limit. The decoupling
behavior of the corrections from the various MSSM sectors is analyzed in the
case of having some or all of the supersymmetric mass parameters and/or the
CP-odd Higgs mass large as compared to the electroweak scale.


title:
Studying the Triple Higgs Self-Coupling Via e+e- --> b bar b HH, t bar t
  HH at Future Linear e+e- Colliders

abstract:
  We study the triple Higgs self-coupling at future $e^{+}e^{-}$ colliders
energies, with the reactions $e^{+}e^{-}\to b \bar b HH$ and $e^{+}e^{-}\to t
\bar t HH$. We evaluate the total cross section of $b\bar bHH$, $t\bar tHH$ and
calculate the total number of events considering the complete set of Feynman
diagrams at tree-level. The sensitivity of the triple Higgs coupling is
considered in the Higgs mass range 110-190 $GeV$, for the energy which is
expected to be available at a possible Next Linear $e^{+}e^{-}$ Collider with a
center-of-mass energy $800, 1000, 1500$ $GeV$ and luminosity 1000 $fb^{-1}$.


title:
Parity-violating aysmmetries in elastic $\vec{e}p$ scattering in the
  chiral quark-soliton model: Comparison with A4, G0, HAPPEX and SAMPLE

abstract:
  We investigate parity-violating electroweak asymmetries in the elastic
scattering of polarized electrons off protons within the framework of the
chiral quark-soliton model ($\chi$QSM). We use as input the former results of
the electromagnetic and strange form factors and newly calculated SU(3)
axial-vector form factors, all evaluated with the same set of four parameters
adjusted several years ago to general mesonic and baryonic properties. Based on
this scheme, which yields positive electric and magnetic strange form factors
with a $\mu_s=(0.08-0.13)\mu_N$, we determine the parity-violating asymmetries
of elastic polarized electron-proton scattering. The results are in a good
agreement with the data of the A4, HAPPEX, and SAMPLE experiments and reproduce
the full $Q^2$-range of the G0-data. We also predict the parity-violating
asymmetries for the backward G0 experiment.


title:
Beauty photoproduction at HERA: kt-factorization versus experimental
  data

abstract:
  We present calculations of the beauty photoproduction at HERA collider in the
framework of the kt-factorization approach. Both direct and resolved photon
contributions are taken into account. The unintegrated gluon densities in a
proton and in a photon are obtained from the full CCFM, from unified BFKL-DGLAP
evolution equations as well as from the Kimber-Martin-Ryskin prescription. We
investigate different production rates (both inclusive and associated with
hadronic jets) and compare our theoretical predictions with the recent
experimental data taken by the H1 and ZEUS collaborations. Special attention is
put on the x_{\gamma}^{obs} variable which is sensitive to the relative
contributions to the beauty production cross section.


title:
Gauge-Higgs Unification and Quark-Lepton Phenomenology in the Warped
  Spacetime

abstract:
  In the dynamical gauge-Higgs unification of electroweak interactions in the
Randall-Sundrum warped spacetime the Higgs boson mass is predicted in the range
120 GeV -- 290 GeV, provided that the spacetime structure is determined at the
Planck scale. Couplings of quarks and leptons to gauge bosons and their
Kaluza-Klein (KK) excited states are determined by the masses of quarks and
leptons. All quarks and leptons other than top quarks have very small couplings
to the KK excited states of gauge bosons. The universality of weak interactions
is slightly broken by magnitudes of $10^{-8}$, $10^{-6}$ and $10^{-2}$ for
$\mu$-$e$, $\tau$-$e$ and $t$-$e$, respectively. Yukawa couplings become
substantially smaller than those in the standard model, by a factor $|\cos
\onehalf \theta_W|$ where $\theta_W$ is the non-Abelian Aharonov-Bohm phase
(the Wilson line phase) associated with dynamical electroweak symmetry
breaking.


title: Non-Universal Effects in Semi-Inclusive B Decays

abstract:
  We show that most spectra in the semileptonic decay B -> X_u + l + nu, such
as for example the distribution in the light-cone momentum p_+ = E_X - p_X
recently considered, do not have the same long-distance structure of the photon
spectrum in the radiative decay B -> X_s + gamma. On the contrary, the
semileptonic distribution in the final hadron energy E_X is connected to the
radiative spectrum via short-distance factors only. The E_X distribution also
has a specific infrared structure known as the ``Sudakov shoulder''. We also
discuss an explicit check of the resummation formula for the semileptonic
decays, based on a recent second-order computation.


title: Probing quantum gravity effects in black holes at LHC

abstract:
  We study modifications of the Hawking emission in the evaporation of
miniature black holes possibly produced in accelerators when their mass
approaches the fundamental scale of gravity, set to 1 TeV according to some
extra dimension models. Back-reaction and quantum gravity corrections are
modelled by employing modified relations between the black hole mass and
temperature. We release the assumption that black holes explode at 1 TeV or
leave a remnant, and let them evaporate to much smaller masses. We have
implemented such modified decay processes into an existing micro-black hole
event generator, performing a study of the decay products in order to search
for phenomenological evidence of quantum gravity effects.


title: Decoupling heavy particles simultaneously

abstract:
  The renormalization group is extended to cases where several heavy particles
are decoupled at the same time. This involves large logarithms which are
scale-invariant and so cannot be eliminated by a change of renormalization
scheme. A set of scale-invariant running couplings, one for each heavy
particle, is constructed without reference to intermediate thresholds. The
entire heavy-quark correction to the axial charge of the weak neutral current
is derived to next-to-leading order, and checked in leading order by evaluating
diagrams explicitly. The mechanism for cancelling contributions from the top
and bottom quarks in the equal-mass limit is surprisingly non-trivial.


title: A Variable-Flavour Number Scheme for NNLO

abstract:
  At NNLO it is particularly important to have a Variable-Flavour Number Scheme
(VFNS) to deal with heavy quarks because there are major problems with both the
zero mass variable-flavour number scheme and the fixed-flavour number scheme. I
illustrate these problems and present a general formulation of a
Variable-Flavour Number Scheme (VFNS)for heavy quarks that is explicitly
implemented up to NNLO in the strong coupling constant alpha_S, and may be used
in NNLO global fits for parton distributions. The procedure combines elements
of the ACOT(chi) scheme and the Thorne-Roberts scheme. Despite the fact that at
NNLO the parton distributions are discontinuous as one changes the number of
active quark flavours, all physical quantities are continuous at flavour
transitions and the comparison with data is successful.


title: Two-loop QED Corrections to Bhabha Scattering

abstract:
  Recent developments in the calculation of the NNLO corrections to the Bhabha
scattering differential cross section in pure QED are briefly reviewed and
discussed.


title: The role of F_L(x,Q^2) in parton analyses

abstract:
  We investigate the effect of the structure function F_L in global parton
analyses of deep inelastic and related hard scattering data. We perform NLO and
NNLO analyses which include the reduced cross section HERA data at high y, as
well as earlier direct measurements of F_L. We find that the NNLO analysis
gives a better description of F_L at low x than that performed at NLO.
Nevertheless the data show evidence of the need of further contributions to
F_L, which may be of higher-twist origin. We study such corrections both
phenomenologically and theoretically via a renormalon approach. The
higher-twist corrections extracted from a successful fit to the data are in
general agreement with the theoretical expectations, but there is still room
for alternative theoretical contributions, particularly at low x and Q^2. The
importance of future measurements of F_L is emphasized.


title: News from FormCalc and LoopTools

abstract:
  The FormCalc package automates the computation of FeynArts amplitudes up to
one loop including the generation of a Fortran code for the numerical
evaluation of the squared matrix element. Major new or enhanced features in
Version 5 are: iterative build-up of essentially arbitrary phase-spaces
including cuts, convolution with density functions, and uniform treatment of
kinematical variables. The LoopTools library supplies the one-loop integrals
necessary for evaluating the squared matrix element. Its most significant
extensions in Version 2.2 are the five-point family of integrals, and complex
and alternate versions.


title: D-wave baryon resonances with charm from coupled-channel dynamics

abstract:
  Identifying the zero-range exchange of vector mesons as the driving force for
the s-wave scattering of pseudo-scalar mesons off the baryon ground states, the
spectrum of ${3/2}^-$ molecules is computed. We predict a strongly bound
15-plet of $C=-1$ states. A narrow crypto-exotic octet of charm-zero states is
foreseen. In the $C=+1$ sector a sextet of narrow resonances is formed due to
the interaction of D mesons with the baryon decuplet. A strongly bound triplet
of double-charm states is a consequence of coupled-channel dynamics driven by
the D mesons.


title:
The origin of mass and the experiments on future high energy
  accelerators

abstract:
  The visible universe - it is the universe of nucleons and electrons. The
appearance of nucleon mass is caused by the violation of chiral symmetry in
quantum chromodynamics (QCD). For this reason, the experiments on high energy
accelerators cannot shed light on the origin of the matter in the visible
universe. The origin of the mass of matter will be clarified, when the
mechanism of chiral symmetry violation in QCD will be elucidated.


title:
Power-spectrum analysis of Super-Kamiokande solar neutrino data, taking
  into account asymmetry in the error estimates

abstract:
  The purpose of this article is to carry out a power-spectrum analysis (based
on likelihood methods) of the Super-Kamiokande 5-day dataset that takes account
of the asymmetry in the error estimates. Whereas the likelihood analysis
involves a linear optimization procedure for symmetrical error estimates, it
involves a nonlinear optimization procedure for asymmetrical error estimates.
  We find that for most frequencies there is little difference between the
power spectra derived from analyses of symmetrized error estimates and from
asymmetrical error estimates. However, this proves not to be the case for the
principal peak in the power spectra, which is found at 9.43 yr-1. A likelihood
analysis which allows for a "floating offset" and takes account of the start
time and end time of each bin and of the flux estimate and the symmetrized
error estimate leads to a power of 11.24 for this peak. A Monte Carlo analysis
shows that there is a chance of only 1% of finding a peak this big or bigger in
the frequency band 1 - 36 yr-1 (the widest band that avoids artificial peaks).
On the other hand, an analysis that takes account of the error asymmetry leads
to a peak with power 13.24 at that frequency. A Monte Carlo analysis shows that
there is a chance of only 0.1% of finding a peak this big or bigger in that
frequency band 1 - 36 yr-1. From this perspective, power spectrum analysis that
takes account of asymmetry of the error estimates gives evidence for
variability that is significant at the 99.9% level.
  We comment briefly on an apparent discrepancy between power spectrum analyses
of the Super-Kamiokande and SNO solar neutrino experiments.


title: Strange tribaryons

abstract:
  We use two-body potentials derived from a constituent quark cluster model to
analyze the bound-state problem of the $\Sigma NN$ system. The observables of
the two-body subsystems, $NN$ and $\Sigma N$, are well reproduced. We do not
find $\Sigma NN$ bound states, but there are two attractive channels with a
resonance close above the three-body threshold. These channels are the
$(I,J)=(1,1/2)$ and $(0,1/2)$, their quantum numbers, widths and energy
ordering consistent with the recently measured strange tribaryons from the
$^{4}{\rm He}(K_{{\rm stopped}}^{-},N)$ reactions in the KEK PS E471
experiment.


title: Single Top Production via Gluon Fusion at CERN LHC

abstract:
  We calculate the one-loop flavor violating top quark decay t -> cgg in the
Minimal Supersymmetric Standard Model. We discuss the branching ratios obtained
with minimal flavor violation, as well as with soft-supersymmetry induced
general flavor violation. Based on this rate we calculate the cross section for
the single top quark production via gluon fusion, gg -> t cbar, and evaluate
its contribution to the cross section for single top quark production in pp
collisions at the Large Hadron Collider. We calculate all contributions coming
from the standard model and charged Higgs loops, as well as gluino (and
neutralino)-up-type squarks, and chargino-down-type squarks loops. Our
numerical results show that the gluino and the chargino contributions are
largest over the whole parameter range in the unconstrained Minimal
Supersymmetric Standard Model. While in general the gluino contributions
dominate the cross section, this result depends on the supersymmetric flavor
violating parameters in the up and down squark sector, the relative mass of the
gauginos, and whether or not the Grand Unified Theory relationships between
gaugino masses are satisfied. In the most promising scenarios, the pp -> t cbar
+ tbar c + X cross section at the Large Hadron Collider can reach a few
hundreds fb.


title:
Towards LHC phenomenology at the loop level: A new method for one-loop
  amplitudes

abstract:
  A precise understanding of LHC phenomenology requires the inclusion of
one-loop corrections for multi-particle final states. In this talk we describe
a semi-numerical method to compute one-loop amplitudes with many external
particles and present first applications.


title:
Chiral and U(1) axial symmetry restoration in linear sigma models with
  two quark flavors

abstract:
  We study the restoration of chiral symmetry in linear sigma models with two
quark flavors. The models taken into consideration have a U(2)_L x U(2)_R and
an O(4) internal symmetry. The physical mesons of these models are sigma, pion,
eta and a_0 where the latter two are not present in the O(4) model. Including
two-loop contributions through sunset graphs we calculate the temperature
behavior of the order parameter and the masses for explicit chiral symmetry
breaking and in the chiral limit. Decay threshold effects introduced by the
sunset graphs alter the temperature dependence of the condensate and
consequently that of the masses as well. This correctly reproduces a
second-order phase transition for the O(4) model and for the U(2)_L x U(2)_R
model with an axial U(1) anomaly as expected from universality class arguments.
Chiral symmetry tends to be restored at higher temperatures in the two-loop
approximation than in the Hartree-Fock approximation. To model a restoration of
the axial U(1) symmetry we imply a temperature-dependent anomaly parameter that
sharply drops at about 175 MeV. This triggers the restoration of chiral
symmetry before the full symmetry is restored and lowers the transition
temperatures significantly below 200 MeV.


title: Incorporating Memory Effects in Phase Separation Processes

abstract:
  We consider the modification of the Cahn-Hilliard equation when a time delay
process through a memory function is taken into account. We then study the
process of spinodal decomposition in fast phase transitions associated with a
conserved order parameter. Finite-time memory effects are seen to affect the
dynamics of phase transition at short times and have the effect of delaying, in
a significant way, the process of rapid growth of the order parameter that
follows a quench into the spinodal region. These effects are important in
several systems characterized by fast processes, like nonequilibrium dynamics
in the early universe and in relativistic heavy-ion collisions.


title: Soft Collinear Effective Theory

abstract:
  In this talk I review soft collinear effective theory. After a discussion of
the formalism and properties of the effective field theory, I turn to
phenomenology. I present results on color-suppressed B to D decays, and on the
Upsilon radiative decay spectrum.


title:
Resolving theta_{23} Degeneracy by Accelerator and Reactor Neutrino
  Oscillation Experiments

abstract:
  If the lepton mixing angle theta_{23} is not maximal, there arises a problem
of ambiguity in determining theta_{23} due to the existence of two degenerate
solutions, one in the first and the other in the second octant. We discuss an
experimental strategy for resolving the theta_{23} octant degeneracy by
combining reactor measurement of theta_{13} with accelerator nu_{mu}
disappearance and nu_{e} appearance experiments. The robustness of the
theta_{23} degeneracy and the difficulty in lifting it only by accelerator
experiments with conventional nu_{mu} (and nu_{mu}-bar) beam are demonstrated
by analytical and numerical treatments. Our method offers a way to overcome the
difficulty and can resolve the degeneracy between solutions sin^2 theta_{23} =
0.4 and sin^2 theta_{23} = 0.6 if sin^2 (2 theta_{13}) \gsim 0.05 at 95% CL by
assuming the T2K phase II experiment and a reactor measurement with an exposure
of 10 GW.kt.yr. The dependence of the resolving power of the octant degeneracy
on the systematic errors of reactor experiments is also examined.


title: The black-disk limit in high-energy ep and pp scattering

abstract:
  We review a recently proposed framework for studying the approach to the
unitarity limit in small-x processes in ep and pp scattering within the DGLAP
approximation. Our formulation is based on the correspondence between the
standard QCD factorization theorems for hard processes and the dipole picture
of small-x scattering in the leading logarithmic approximation. It allows us to
incorporate information about the transverse spatial distribution of gluons in
the proton (GPD) from exclusive vector meson production at HERA. We show that
the interaction of small-size color singlet configurations with the proton
approaches the "black-disk limit" (BDL) due to the growth of the DGLAP gluon
density at small x. This new dynamical regime is marginally visible in
diffractive DIS at HERA, and will be fully reached in central pp collisions at
LHC.


title:
Generalized Covariant Derivative on Extra Dimension and Weinberg-Salam
  Model

abstract:
  The generalized covariant derivative on 5-dimen-sional space including
1-dimensional extra compact space is defined, and, by use of it, the
Weinberg-Salam model is reconstructed. The spontaneous breakdown of symmetry
takes place owing to the extra dimension under the settings that the Higgs
field exists in the extra dimensional space depending on the argument $y$ of
this extra space, whereas the gauge and fermion fields do not depend on $y$.
Both Yang-Mills-Higgs and fermion Lagrangians in Weinberg-Salam model are
correctly reproduced.


title:
QCD Corrections to Dilepton Production near Partonic Threshold in
  proton-antiproton Scattering

abstract:
  We present a recent study of the QCD corrections to dilepton production near
partonic threshold in transversely polarized \bar{p}p scattering. We analyze
the role of the higher-order perturbative QCD corrections in terms of the
available fixed-order contributions as well as of all-order soft-gluon
resummations for the kinematical regime of proposed experiments at GSI-FAIR. We
find that perturbative corrections are large for both unpolarized and polarized
cross sections, but that the spin asymmetries are stable. The role of the far
infrared region of the momentum integral in the resummed exponent and the
effect of the NNLL resummation are briefly discussed.


title: Dark Matter Generation and Split Supersymmetry

abstract:
  We analyze a simple Split Supersymmetry scenario where fermion masses come
from anomaly mediation, yielding m_s ~ 1000 TeV, m_{3/2} ~ 100 TeV, and m_f ~ 1
TeV. We consider non-thermal dark matter production in the presence of moduli,
and we find that the decay chains of moduli to LSPs and moduli to gravitinos to
LSPs generate dark matter more efficiently than perturbative freeze-out,
allowing for a light, LHC visible spectrum. These decaying moduli can also
weaken cosmological constraints on the axion decay constant. With squark masses
of order 1000 TeV, LHC gluinos will decay millimeters from their primary
vertices, resulting in a striking experimental signature, and the suppression
of Flavor Changing Neutral Currents is almost sufficient to allow arbitrary
mixing in squark mass matrices.


title: Two-loop SUSY QCD correction to the gluino pole mass

abstract:
  We calculate the pole mass of the gluino as a function of the running
parameters in the lagrangian, to O(alpha_s^2) in SUSY QCD. The correction
shifts the pole mass from the running mass by typically 1-2 %. This shift can
be larger than the expected accuracy of the mass determination at future
colliders, and should be taken into account for precision studies of the SUSY
breaking parameters. The effects of other corrections are breifly commented.


title: Direct CP violation in B \to \rho^0(\omega) PS

abstract:
  We calculate the direct CP violating asymmetry parameter, $a_{CP}$, for $B
\to \pi^{+} \pi^{-} \pi$ and $B \to \pi^{+} \pi^{-} K$ decays, in the case
where $\rho^0-\omega$ mixing effects are taken into account. We find that the
direct CP asymmetry for $B^{-} \to \pi^{+} \pi^{-} \pi^{-}$, $\bar{B}^{0} \to
\pi^{+} \pi^{-}\pi^{0}$, $B^{-} \to \pi^{+} \pi^{-} K^{-}$ and $\bar{B}^{0} \to
\pi^{+} \pi^{-}\bar{K}^{0}$, reaches its maximum when the invariant mass
$\pi^{+} \pi^{-}$ is in the vicinity of the $\omega$ meson mass. The inclusion
of $\rho^0-\omega$ mixing provides an opportunity to erase, without ambiguity,
the phase uncertainty mod$(\pi)$ in the determination of the CKM angles
$\alpha$ in case of $b\to u$ and $\gamma$ in case of $b \to s$.


title: Order of the chiral phase transtion in the sigma models

abstract:
  The chiral phase transition at a certain critical temperature is a
restoration mechanism of the chiral symmetry, broken by the nonzero mass of
quarks and mesons. The transition can be studied through several models, among
which are the sigma models. An analysis is made on the linear and nonlinear
sigma models with different approximations, and we show that the transition is
of second order in both cases.


title:
From Double Chooz to Triple Chooz - Neutrino Physics at the Chooz
  Reactor Complex

abstract:
  We discuss the potential of the proposed Double Chooz reactor experiment to
measure the neutrino mixing angle $\sin^2 2\theta_{13}$. We especially consider
systematical uncertainties and their partial cancellation in a near and far
detector operation, and we discuss implications of a delayed near detector
startup. Furthermore, we introduce Triple Chooz, which is a possible upgrade
scenario assuming a second, larger far detector, which could start data taking
in an existing cavern five years after the first far detector. We review the
role of the Chooz reactor experiments in the global context of future neutrino
beam experiments. We find that both Double Chooz and Triple Chooz can play a
leading role in the search for a finite value of $\sin^2 2\theta_{13}$. Double
Chooz could achieve a sensitivity limit of $\sim 2 \cdot 10^{-2}$ at the
90%~confidence level after 5~years while the Triple Chooz setup could give a
sensitivity below $10^{-2}$.


title:
Analysis of the semileptonic (B_c -> B_u* l+ l-) decay from QCD sum
  rules

abstract:
  We analyze the semileptonic (B_c -> B_u* l+ l-) decay in the frame work of
the Standard Model. We calculate the (B_c) to (B_u*) transition form factors in
QCD sum rules. Analytical expressions for the spectral densities and gluon
condensates are presented. The branching ratio of the (B_c -> B_u* l+ l-) decay
is calculated, and it is obtained that this decay can be detectable at
forthcoming LHC machines.


abstract:
  Some recent results on evaluating Feynman integrals are reviewed. The status
of the method based on Mellin-Barnes representation as a powerful tool to
evaluate individual Feynman integrals is characterized. A new method based on
Groebner bases to solve integration by parts relations in an automatic way is
described.


title:
Spectrum of Higgs particles in the Exceptional Supersymmetric Standard
  Model

abstract:
  We discuss the spectrum of Higgs bosons in the framework of the exceptional
supersymmetric standard model. The presence of a $Z'$ and exotic particles
predicted by the exceptional SUSY model allows the lightest Higgs particle to
be significantly heavier than in the MSSM and NMSSM. When the mass of the
lightest Higgs boson is larger than $135-140 {GeV}$ the heaviest scalar,
pseudoscalar and charged Higgs states lie beyond the ${TeV}$ range.


title: Fractional Analytic Perturbation Theory in QCD and Exclusive Reactions

abstract:
  Different ``analytization'' procedures for the factorized pion form factor
are discussed in comparison with the standard QCD perturbation theory at NLO.
It is argued that demanding the analyticity of the exclusive amplitude as a
\emph{whole}, entails insensitivity of the results on all scheme and
scale-setting parameters, including the factorization scale. This enables us to
develop an approach of optimized perturbation theory within the MS-bar scheme
and to generalize the Analytic Perturbation Theory to non-integer (fractional)
powers of the strong running coupling in the complex Q^2 plane


title: Gribov's Picture of Confinement and Chiral Symmetry Breaking

abstract:
  Gribov's scenario of confinement caused by supercritical charges is described
and the present status of Gribov's equation for the Green function of light
quarks is discussed.


title: CP asymmetry and branching ratio of B -> pi pi

abstract:
  We investigate the branching ratios and CP asymmetries of the B -> pi pi
processes measured in B factory experiments. Fits to the experimental data of
this process indicate a large ratio of color-suppressed (C) to color-allowed
(T) tree contributions. We investigate whether the large C/T can be explained
within the QCD based model computation with i) a large effect from the
end-point singularity or with ii) large final-state-interaction phase between
two different isospin amplitudes. We show that the current experimental data do
not exclude either possibility but we may be able to distinguish these two
effects in future measurements of direct CP asymmetry of B -> pi^0 pi^0.


title: Updated Constraints on the Minimal Supergravity Model

abstract:
  We provide an up-to-date analysis of the parameter space of the minimal
supergravity model (mSUGRA). Novel features include the new central value of
the top quark mass, an improved calculation of the masses of the supersymmetric
particles and the neutral Higgs bosons, constraints from b to s \ell^+ \ell^-
decays, and a careful treatment of the most important experimental and
theoretical uncertainties. In addition to the by now traditional plots of the
allowed region in the (m_0, m_{1/2}) plane, we show allowed regions in the
planes spanned by pairs of {\em physical} sparticle or Higgs boson masses.
Moreover, we search for the minimal allowed masses of new particles for various
sets of constraints. We find that in many cases the direct experimental limits
from collider and Dark Matter searches can be saturated even in this minimal
model, and even after including the by now quite restrictive constraint on the
Dark Matter relic density.


title: Phase transitions in the early and the present Universe

abstract:
  The evolution of the Universe is the ultimate laboratory to study fundamental
physics across energy scales that span about 25 orders of magnitude: from the
grand unification scale through particle and nuclear physics scales down to the
scale of atomic physics. The standard models of cosmology and particle physics
provide the basic understanding of the early and present Universe and predict a
series of phase transitions that occurred in succession during the expansion
and cooling history of the Universe. We survey these phase transitions,
highlighting the equilibrium and non-equilibrium effects as well as their
observational and cosmological consequences. We discuss the current theoretical
and experimental programs to study phase transitions in QCD and nuclear matter
in accelerators along with the new results on novel states of matter as well as
on multi- fragmentation in nuclear matter. A critical assessment of
similarities and differences between the conditions in the early universe and
those in ultra- relativistic heavy ion collisions is presented. Cosmological
observations and accelerator experiments are converging towards an
unprecedented understanding of the early and present Universe.


title: A parameterisation of single and multiple muons in the deep water or ice

abstract:
  A new parameterisation of atmospheric muons deep underwater (or ice) is
presented. It takes into account the simultaneous arrival of muons in bundle
giving the multiplicity of the events and the muon energy spectrum as a
function of their lateral distribution in a shower.


title: Pentaquark state in pole-dominated QCD sum rules

abstract:
  We propose a new approach in QCD sum rules applied for exotic hadrons with a
number of quarks, exemplifying the pentaquark Theta^{+} (I=0,J=1/2) in the
Borel sum rule. Our approach enables reliable extraction of the pentaquark
properties from the sum rule with good stability in a remarkably wide Borel
window. The appearance of its valid window originates from a favorable setup of
the correlation functions with the aid of it chirality of the interpolating
fields on the analogy of the Weinberg sum rule for the vector currents. Our
setup leads to large suppression of the continuum contributions which have
spoiled the Borel stability in the previous analyses, and consequently enhances
importance of the higher-dimensional contributions of the OPE, which are
indispensable for investigating the pentaquark properties. Implementing the OPE
analysis up to dimension 15, we find that the sum rules for the chiral-even and
odd parts independently give the Theta^{+} mass of 1.68 pm 0.22 GeV with
uncertainties of the condensate values. Our sum rule indeed gives rather flat
Borel curves almost independent of the continuum thresholds both for the mass
and pole residue. Finally, we also discuss possible isolation of the observed
states from the KN scattering state on view of chiral symmetry.


title: Regularization of supersymmetric theories - recent progress

abstract:
  General issues concerning the regularization of supersymmetric theories using
dimensional regularization and dimensional reduction are reviewed. Recent
progress on problems of dimensional reduction related to factorization,
supersymmetry, Higgs boson mass calculations, and mathematical consistency is
discussed.


title:
Proof of the multi-Regge form of QCD amplitudes with gluon exchanges in
  the NLA

abstract:
  The multi--Regge form of QCD amplitudes with gluon exchanges is proved in the
next-to-leading approximation. The proof is based on the bootstrap relations,
which are required for the compatibility of this form with the s-channel
unitarity. We show that the fulfillment of all these relations ensures the
Reggeized form of energy dependent radiative corrections order by order in
perturbation theory. Then we prove that all these relations are fulfilled if
several bootstrap conditions on the Reggeon vertices and trajectory hold true.
Now all these conditions are checked and proved to be satisfied.


title:
Final State Interactions in B to pi-pi, pi-K decays and constrains on
  gamma

abstract:
  We apply the quasi-elastic assumption of the strong final state interactions
to describe the B to pi-pi and B to pi-K branching ratios and CP asymmetries
and derive bounds on gamma. We find that small electroweak penguins
contributions and values of gamma larger than in standard fit results are
favored by data.


title: Vector meson decays from the Extended Chiral Quark Model

abstract:
  We derive the the effective lagrangian that describes the interactions among
vector, axial-vector mesons and pseudoscalars starting from the extended chiral
quark model (ECQM). The results for the low-energy constants of this effective
lagrangian have a parametric resemblance with existing predictions based on the
Nambu-Jona-Lasinio model (except for some overall signs that we correct), but
are numerically different. Therefore a precise measurement of these decay
constants can shed some light on the way chiral symmetry breaking is modelled
in QCD. Although most of the constants are poorly measured, comparison with
phenomenology allows us to determine one of the parameters of the ECQM that
could not be fully determined in previous analyses.


title: Do glueballs contribute in heavy ion collisions?

abstract:
  In heavy ion collision simulations many hadron states and/or parton degrees
of freedom are included in order to obtain the observables. Meson spectroscopy,
for example, considers the $0^{++}$ meson as a mixture of $q\bar{q}$ and glue.
This fact is usually not considered in heavy ion collision physics. In the
present work we consider two extreme possibilities for the constitution of the
$0^{++}$ meson, either as a pure glueball or as $q\bar{q}$-meson. The
scattering amplitude and cross-sections with constituent interchange are
determined for the two situations. The comparison showed that the
glueball-glueball elastic scattering cross-section for a color singlet state is
between one to two orders of magnitude smaller than the corresponding
$q\bar{q}$ state. The $2^{++}$ glueball-glueball interaction is also evaluated
with similar behavior. Thus, glueball-glueball scattering is not very likely to
introduce significant changes in heavy ion collision observables.


title: Parity Doubling Among the Baryons

abstract:
  We study the evidence for and possible origins of parity doubling among the
baryons. First we explore the experimental evidence, finding a significant
signal for parity doubling in the non-strange baryons, but little evidence
among strange baryons. Next we discuss potential explanations for this
phenomenon. Possibilities include suppression of the violation of the flavor
singlet axial symmetry ($U(1)_{A}$) of QCD, which is broken by the triangle
anomaly and by quark masses. A conventional Wigner-Weyl realization of the
$SU(2)_{L}\times SU(2)_{R}$ chiral symmetry would also result in parity
doubling. However this requires the suppression of families of \emph{chirally
invariant} operators by some other dynamical mechanism. In this scenario the
parity doubled states should decouple from pions. We discuss other explanations
including connections to chiral invariant short distance physics motivated by
large $N_{c}$ arguments as suggested by Shifman and others, and intrinsic
deformation of relatively rigid highly excited hadrons, leading to parity
doubling on the leading Regge trajectory. Finally we review the spectroscopic
consequences of chiral symmetry using a formalism introduced by Weinberg, and
use it to describe two baryons of opposite parity.


title:
Algorithmic Derivation of Additive Selection Rules and Particle Families
  from Reaction Data

abstract:
  We describe a machine-learning system that uses linear vector-space based
techniques for inference from observations to extend previous work on model
construction for particle physics (Valdes-Perez 96, 94, Kocabas 91). The
program searches for quantities conserved in all reactions from a given input
set; given current data it rediscovers the family conservation laws: baryon#,
electron#, muon# and tau#. We show that these families are uniquely determined
by frequent decay data.


title:
Fission Cycling in Supernova Nucleosynthesis: Active-Sterile Neutrino
  Oscillations

abstract:
  We investigate nucleosynthesis in the supernovae post-core bounce
neutrino-driven wind environment in the presence of active-sterile neutrino
transformation. We consider active-sterile neutrino oscillations for a range of
mixing parameters: vacuum mass-squared differences of 0.1 eV^2 < dm^2 < 100
eV^2, and vacuum mixing angles of sin^2(2 theta_v) > 10^-4. We find a
consistent r-process pattern for a large range of mixing parameters that is in
rough agreement with the halo star CS 22892-052 abundances and the pattern
shape is determined by fission cycling. We find that the allowed region for the
formation of the r-process peaks overlaps the LSND and NSBL (3+1) allowed
region.


title: Split-SUSY versus SUSY GUTS

abstract:
  The gauge coupling unification is one of main motivations in the split-SUSY
scenario, and the existence of the grand unified theories (GUTs) is assumed. We
examine how to realize split-SUSY mass spectrum in the context of GUTs and find
that the construction of split-SUSY GUTs is by no means straightforward. With
R-symmetry breaking sources in the GUT sector,
  GUT particles play a role of the messengers in the gauge mediation scenario
and their contributions to gaugino masses can be sizable. We find the upper
bound on soft scalar masses of
  O(10^{10}) GeV from consistency for constructing the split-SUSY GUT. Also, we
discuss the attempt to construct R-symmetric GUT models.


title: Collider Implications of Multiple Non-Universal Extra Dimensions

abstract:
  We consider multiple TeV scale extra compact dimensions in an asymmetric
string compactification scenario in which the SM gauge bosons can propagate
into the TeV scale extra dimensions while the SM fermions are confined to the
usual SM D3 brane. We calculate the contributions that the KK excitations of
the gluons make to the multijet cross sections in proton proton collisions at
the LHC energy. At very high pT, the dijet signal will either be enhanced
significantly due to virtual g star exchanges or place a lower bound on the
compactification scale of about 8 TeV. We find that the dijet signal is very
sensitive to three parameters: the compactification scale, the string scale,
and the number of extra dimensions. Thus, although the dijet signal is much
more sensitive to KK effects, the dijet signal alone does not provide
sufficient information to deduce the number of extra dimensions nor the
compactification scale. However, the three jet signal, which is not sensitive
to the string scale, can be analyzed in conjunction with the dijet signal to
extract all three parameters. For proton proton collisions at the LHC energy,
the three jet signal can be significantly enhanced by KK contributions for a
compactification scale of about 4 to 5 TeV.


title: Operator Approach to Isospin Violation in Pion Photoproduction

abstract:
  Unambiguous isospin violation in the strong interaction sector is a key issue
in low energy hadronic physics, both experimentally and theoretically.
Bernstein has employed the Fermi-Watson theorem to demonstrate that pion
photoproduction is a process where isospin violation in the pi N system can be
revealed, an approach we review here. Here we propose a general operator
approach to the phenomenon in pion photoproduction, thereby providing an
analogue for the framework that was proposed for pi N scattering by Kaufmann
and Gibbs. The resulting set of amplitudes could form the basis for determining
the multipole amplitudes for photoproduction. Thus, the so resulting phase
shift determination from photoproduction can then be used via the Fermi-Watson
theorem to resolve discrepancies in pi N phase shift analyses. We point out
that casting effective Lagrangian results in terms of our framework would be
beneficial. The upcoming polarization experiments are an ideal setting to test
our approach, and also to constrain better the isotensor currents which
strictly are not forbidden.


title: Construction and analysis of a simplified many-body neutrino model

abstract:
  In dense neutrino systems, such as found in the early Universe, or near a
supernova core, neutrino flavor evolution is affected by coherent
neutrino-neutrino scattering. It has been recently suggested that many-particle
quantum entanglement effects may play an essential role in these systems,
potentially invalidating the traditional description in terms of a set of
single-particle evolution equations. We model the neutrino system by a system
of interacting spins, following an earlier work which showed that such a spin
system can in some cases be solved exactly. We extend this work by constructing
an exact analytical solution to a more general spin system, including initial
states with asymmetric spin distribution and, moreover, not necessarily aligned
along the same axis. Our solution exhibits a rich set of behaviors, including
coherent oscillations and dephasing and a transition from the classical to
quantum regimes. We argue that the classical evolution of the spin system
captures the entire coherent behavior of the neutrino system, while the quantum
effects in the spin system capture some, but not all, of the neutrino
incoherent evolution. By comparing the spin and neutrino systems, we find no
evidence for the violation of the accepted one-body description, though the
argument involves some subtleties not appreciated before. The analysis in this
paper may apply to other two-state systems beyond the neutrino field.


title: Statistical mechanics of confined quantum particles

abstract:
  We develop statistical mechanics and thermodynamics of Bose and Fermi systems
in relativistic harmonic oscillator (RHO) confining potential, which may be
applicable in quark gluon plasma (QGP), astrophysics, Bose-Einstein
condensation (BEC), condensed matter physics etc. Detailed study of QGP system
is carried out and compared with lattice results. Further, as an application,
our equation of state (EoS) of QGP is used to study compact stars like quark
star.


title: A universal shape of empirical mass formula for all leptons and quarks

abstract:
  A specific universal shape of empirical mass formula is proposed for all
leptons $\nu_1, \nu_2, \nu_3$ and $e^-, \mu^-, \tau^- $ as well as all quarks
$u, c, t$ and $d, s, b$ of three generations, parametrized by three free
constants $ \mu, \epsilon, \xi$ assuming four different triplets of values.
Four such triplets of parameter values are determined or estimated from the
present data. Mass spectra in the four cases are related to each other by
shifting the triplet of parameters $ \mu, \epsilon, \xi$. For charged leptons
$\xi \simeq 0$ (but probably $\xi \neq 0$). If for them $\xi $ is put to be
exactly 0, then $m_\tau = 1776.80$ MeV is predicted after the input of
experimental $m_e$ and $m_\mu$ (the central value of experimental $m_\tau =
1776.99^{+0.29}_{-0.26}$ MeV corresponds to $ \xi =1.8\times 10^{-3}\neq 0$).
For neutrinos $1/\xi \simeq 0$ (but $1/\xi \neq 0$ in the case of normal
hierarchy $m^2_{\nu_1} \ll m^2_{\nu_2} \ll m^2_{\nu_3}$). If for neutrinos
$1/\xi $ is conjectured to be exactly 0, then $(m_{\nu_1}, m_{\nu_2},
m_{\nu_3}) \sim (1.5, 1.2, 5.1)\times 10^{-2}$ eV are predicted after the input
of experimental estimates $|m^2_{\nu_2} - m^2_{\nu_1}| \sim 8.0\times 10^{-5}
{\rm eV}^2$ and $|m^2_{\nu_3} - m^2_{\nu_2}| \sim 2.4\times 10^{-3} {\rm
eV}^2$. Thus, the mass ordering of neutrino states 1 and 2 is then inverted,
while the position of state 3 is normal.