title: The QCD critical end point in the SU(3) Nambu--Jona-Lasinio model

abstract:
  We study the chiral phase transition at finite temperature $T$ and baryonic
chemical potential $\mu_B$ within the framework of the SU(3) Nambu-Jona-Lasinio
(NJL) model. The QCD critical end point (CEP) and the critical line at finite
$T$ and $\mu_B$ are investigated: the study of physical quantities, such as the
baryon number susceptibility and the specific heat in the vicinity the CEP,
will provide relevant information concerning the order of the phase transition.
The class of the CEP is determined by calculating the critical exponents of
those quantities.


title:
Implications of Canonical Gauge Coupling Unification in High-Scale
  Supersymmetry Breaking

abstract:
  We systematically construct two kinds of models with canonical gauge coupling
unification and universal high-scale supersymmetry breaking. In the first we
introduce standard vector-like particles while in the second we also include
non-standard vector-like particles. We require that the gauge coupling
unification scale is from 5 x 10^{15} GeV to the Planck scale, that the
universal supersymmetry breaking scale is from 10 TeV to the unification scale,
and that the masses of the vector-like particles (M_V) are universal and in the
range from 200 GeV to 1 TeV. Using two-loop renormalization group equation
(RGE) running for the gauge couplings and one-loop RGE running for Yukawa
couplings and the Higgs quartic coupling, we calculate the supersymmetry
breaking scales, the gauge coupling unification scales, and the corresponding
Higgs mass ranges. When the vector-like particle masses are less than 1 TeV,
these models can be tested at the LHC.


title: Supersymmetric economical 3-3-1 model

abstract:
  The supersymmetric extension of the economical 3-3-1 model is presented. The
constraint equations and the gauge boson identification establish a relation
between the vacuum expectation values (VEVs) at the top and bottom elements of
the Higgs triplet $\chi$ and its supersymmetric counterpart $\chi^\prime$.
Because of this relation, the exact diagonalization of neutral gauge boson
sector has been performed. The gauge bosons and their associated Goldstone ones
mix in the same way as in non-supersymmetric version. This is also correct in
the case of gauginos. The eigenvalues and eigenstates in the Higgs sector are
derived. The model contains a heavy neutral Higgs boson with mass equal to
those of the neutral non-Hermitian gauge boson $X^0$ and a charged scalar with
mass equal to those of the $W$ boson in the standard model, i. e. $
m_{\varrho_1} = m_W$. This result is in good agreement with the present
estimation: $m_{H^\pm} > 79.3$ GeV, CL= 95 %. We also show that the boson
sector and the fermion sector gain masses in the same way as in the
non-supersymmetric case.


title: Modified Newton's law, braneworlds, and the gravitational quantum well

abstract:
  Most of the theories involving extra dimensions assume that only the
gravitational interaction can propagate in them. In such approaches, called
brane world models, the effective, 4-dimensional, Newton's law is modified at
short as well as at large distances. Usually, the deformation of Newton's law
at large distances is parametrized by a Yukawa potential, which arises mainly
from theories with compactified extra dimensions. In many other models however,
the extra dimensions are infinite. These approaches lead to a large distance
power-law deformation of the gravitational newtonian potential $V_N(r)$, namely
$V(r)=(1+k_b/r^b)V_N(r)$, which is less studied in the literature. We
investigate here the dynamics of a particle in a gravitational quantum well
with such a power-law deformation. The effects of the deformation on the energy
spectrum are discussed. We also compare our modified spectrum to the results
obtained with the GRANIT experiment, where the effects of the Earth's
gravitational field on quantum states of ultra cold neutrons moving above a
mirror are studied. This comparison leads to upper bounds on $b$ and $k_b$.


title:
Gravi-Leptogenesis: Leptogenesis from Gravity Waves in Pseudo-scalar
  Driven Inflation Models

abstract:
  In this talk we present a mechanism for leptogenesis which is based on
gravity waves produced during inflation. We show that when inflation is driven
by a pseudo-scalar field the metric perturbations generated during inflation
can become birefringent, therefore giving a non-vanishing contribution to the
gravitational triangle anomaly and sourcing lepton anti-lepton asymmetry. As
this asymmetry is sourced by the fields which are active during inflation, it
is not washed out or diluted by inflation. The amount of matter asymmetry
generated in our model can be of realistic size for the parameters within the
range of some inflationary scenarios and grand unified theories. This talk is
based on Ref.[1] which has appeared on the arXiv as hep-th/0403069.


title: Are there monojets in high-energy proton-nucleus collisions?

abstract:
  We study high-energy proton-nucleus collisions within the Colour Glass
Condensate framework, and compute the probabilities of having a definite number
of scatterings in the nucleus with a momentum transfer larger than a given cut.
Various properties of the distribution in the number of multiple scatterings
are investigated, and we conclude that events with monojets are very unlikely,
except for extreme values of the saturation scale Qs.


title: Weak radiative hyperon decays in quark model

abstract:
  Weak radiative hyperon decays are considered in the framework of a quark
model. The phenomenological model includes 1-quark transitions with the
effective $sd\gamma$-vertex and 2-quark ones with the W-exchange $s+u\to
u+d+\gamma$ and turns out to describe well the data and gives predictions for
asymmetry of the decays $\Lambda\to n+\gamma$ and $\Xi^-\to \Sigma^- +\gamma$.


title: Pion polarisabilities and bremsstrahlung

abstract:
  A model for high-energy, small-angle pion-nucleus bremsstrahlung, $ \pi^-
+A\to\pi^- +\gamma +A$,is developed within the Glauber diffraction theory.
Special attention is focussed on the possibility of measuring the pion
polarisability in such reactions. That is the case under the Coulomb peak
provided the bremsstrahlung photon carries practically all the energy of the
incident pion. Only radiation from external legs is considered.


title: Strange results from chiral soliton models

abstract:
  The standard collective quantization treatment of the strangeness content of
the nucleon in chiral soliton models such as the Skyrmion is shown to be
inconsistent with the semi-classical expansion on which the treatment is based.
The strangeness content vanishes at leading order in the semi-classical
expansion. Collective quantization correctly describes some contributions to
the strangeness content at the first nonvanishing order in the expansion, but
neglects others at the same order--namely, those associated with continuum
modes. Moreover, there are fundamental difficulties in computing at a constant
order in the expansion due to the non-renormalizable nature of chiral soliton
models. Moreover, there are fundamental difficulties in computing at a constant
order in the expansion due to the non-renormalizable nature of chiral soliton
models and the absence of any viable power counting scheme. We show that the
continuum mode contribution to the strangeness diverges, and as a result the
computation of the strangeness content at leading non-vanishing order is not a
well-posed mathematical problem in these models.


title: Reggeized quark -- Reggeized quark -- gluon effective vertex

abstract:
  This paper is devoted to the calculation of the Reggeized quark-Reggeized
quark-gluon effective vertex in perturbative QCD in the next-to-leading order.
The case of QCD with massless quarks is considered and the correction is
obtained in the D->4 limit. This vertex appears in the quark Reggeization
theory, which next-to-leading order extension is now under construction.


title: Novel Effects in Electroweak Breaking from a Hidden Sector

abstract:
  The Higgs boson offers a unique window to hidden sector fields S_i, singlets
under the Standard Model gauge group, via the renormalizable interactions |H|^2
S_i^2. We prove that such interactions can provide new patterns for electroweak
breaking, including radiative breaking by dimensional transmutation consistent
with LEP bounds, and trigger the strong enough first order phase transition
required by electroweak baryogenesis.


title:
$B_{s} \to (\rho, \omega, \phi) \eta^{(\prime)}$ Decays in the
  Perturbative QCD Approach

abstract:
  In this paper, we calculate the branching ratios and CP-violating asymmetries
for $B_{s} \to (\rho^0,\omega, \phi) \eta^{(\prime)}$ decays in the
perturbative QCD (pQCD) factorization approach. Numerically we found that (a)
the pQCD predictions for the CP-averaged branching ratios are
$Br(B_{s}\to\rho^0 \eta)\approx 0.07 \times 10^{-6}$,
$Br(B_{s}\to\rho^{0}\eta^\prime) \approx 0.10 \times 10^{-6}$, $Br(B_{s}
\to\omega\eta) \approx 0.02 \times 10^{-6}$, $Br(B_{s} \to\omega\eta^\prime)
\approx 0.13 \times 10^{-6}$, $Br(B_{s} \to\phi\eta) \approx 2.7 \times
10^{-5}$ and $Br(B_{s} \to\phi\eta^\prime) \approx 2.0 \times 10^{-5}$; (b) the
gluonic contributions are small in size: less than 3% for $B \to (\rho, \omega,
\phi) \eta$ decays, and about 10% for $B \to (\rho, \omega, \phi) \eta^\prime$
decays; and (c) the pQCD predictions for the CP-violating asymmetries of the
considered decays are generally not large in magnitude. The above predictions
can be tested in the forthcoming LHC-b experiments at CERN.


title:
The role of the gluonic gg<->ggg interactions in early thermalization in
  ultrarelativistic heavy-ion collisions

abstract:
  We ``quantify'' the role of elastic as well as inelastic gg<->ggg pQCD
processes in kinetic equilibration within a pQCD inspired parton cascade. The
contributions of different processes to kinetic equilibration are manifested by
the transport collision rates. We find that in a central Au+Au collision at
RHIC energy pQCD Bremstrahlung processes are much more efficient for momentum
isotropization compared to elastic scatterings. For the parameters chosen the
ratio of their transport collision rates amounts to 5:1.


title: Exact One Loop Running Couplings in the Standard Model

abstract:
  Taking the dominant couplings in the standard model to be the quartic scalar
coupling, the Yukawa coupling of the top quark, and the SU(3) gauge coupling,
we consider their associated running couplings to one loop order. Despite the
non-linear nature of the differential equations governing these functions, we
show that they can be solved exactly. The nature of these solutions is
discussed and their singularity structure is examined. It is shown that for a
sufficiently small Higgs mass, the quartic scalar coupling decreases with
increasing energy scale and becomes negative, indicative of vacuum instability.
This behavior changes for a Higgs mass greater than 168 GeV, beyond which this
couplant increases with increasing energy scales and becomes singular prior to
the ultraviolet (UV) pole of the Yukawa coupling. Upper and lower bounds on the
Higgs mass corresponding to new physics at the TeV scale are obtained and
compare favourably with the numerical results of the one-loop and two-loop
analyses with inclusion of electroweak couplings.


title: Weak Pion Production off the Nucleon

abstract:
  We develop a model for the weak pion production off the nucleon, which
besides the Delta pole mechanism (weak excitation of the $\Delta(1232)$
resonance and its subsequent decay into $N\pi$), includes also some background
terms required by chiral symmetry. We re-fit the $C_5^A(q^2)$ form factor to
the flux averaged $\nu_\mu p \to \mu^-p\pi^+$ ANL $q^2-$differential cross
section data, finding a substantially smaller contribution of the Delta pole
mechanism than traditionally assumed in the literature. Within this scheme, we
calculate several differential and integrated cross sections, including pion
angular distributions, induced by neutrinos and antineutrinos and driven both
by charged and neutral currents. In all cases we find that the background terms
produce quite significant effects and that they lead to an overall improved
description of the data, as compared to the case where only the Delta pole
mechanism is considered. We also show that the interference between the Delta
pole and the background terms produces parity-violating contributions to the
pion angular differential cross section, which are intimately linked to $T-$odd
correlations in the contraction between the leptonic and hadronic tensors.
However, these latter correlations do not imply a genuine violation of time
reversal invariance because of the existence of strong final state interaction
effects.


title: Searching for the Kaluza-Klein Graviton in Bulk RS Models

abstract:
  The best-studied version of the RS1 model has all the Standard Model
particles confined to the TeV brane. However, recent variants have the Standard
Model fermions and gauge bosons located in the bulk five-dimensional spacetime.
We study the potential reach of the LHC in searching for the lightest KK
partner of the graviton in the most promising such models in which the
right-handed top is localized very near the TeV brane and the light fermions
are localized near the Planck brane. We consider both detection and the
establishment of the spin-2 nature of the resonance should it be found.


title:
Determination of the Neutrino Mass Hierarchy via the Phase of the
  Disappearance Oscillation Probability with a Monochromatic \bar{\nu}_e Source

abstract:
  The neutrino mass hierarchy can be determined, in principle, by measuring a
phase in the disappearance oscillation probability in vacuum, without relying
on the matter effect, using a single channel. This phase is not the same for
the normal and inverted neutrino mass spectra. In this paper, we give a
complete description and physics understanding of the method. The key feature
of the method is to detect advancement (normal) or retardation (inverted) of
the phase of the atmospheric-scale oscillation relative to the solar-scale
oscillation. We then show that this method can be realized with the recently
proposed resonant $\bar{\nu}_{e}$ absorption reaction enhanced by M\"ossbauer
effect. The unique feature of this setup is the ultra-monochromaticity of the
observed \bar{\nu}_{e}'s. Because of this feature the phase advancement or
retardation of atmospheric-scale neutrino oscillation is detectable after 20 or
more oscillations if the source and the target are made sufficiently compact in
size. A quantitative estimate of the sensitivity to mass hierarchy resolution
is given. We have also examined how a possible continuation of such experiment
can be carried out in order also to achieve high precision (few %)
determination of the solar-scale oscillation parameters \Delta m^2_{21} and
\theta_{12}.


title: PHOKHARA, the radiative return and the $(g-2)_{\mu}$ puzzle

abstract:
  The radiative return has proven to be a competitive method for the precise
measurement of the hadronic cross section, detailed studies of hadronic
interactions, and even discoveries of new resonances. The most recent and
future devolopments of the Monte Carlo event generator PHOKHARA are
highlighted, and the impact of the radiative return measurements on the
$(g-2)_\mu$ puzzle is discussed.


title: 1/NC Expansion of QCD Amplitudes

abstract:
  This talk comments the main features of a hadronic description of QCD in the
limit of large number of colours. We derive a quantum field theory for mesons
based on chiral symmetry and a perturbative expansion in 1/NC. Some large-NC
and next-to-leading order results are reviewed.


title:
Prospects of Medium Tomography using 2-,3- and 4-Particle Correlations
  for a (semi-)hard Trigger

abstract:
  Hard partons propagating through hot and dense matter lose energy, leading to
the observed depletion of hard hadron spectra in nucleus nucleus collision as
compared to scaled proton proton collisions. This lost energy has to be
redistributed in the medium due to the conservation of energy, which is
manifest in the p_T dependence of the angular correlation pattern of hadrons
associate with a (semi-) hard trigger. While at low p_T a splitting of a broad
peak is observed, at high p_T the structure shows vacuum width, albeit with
reduced yield. This sugests a transfer of energy from hard partons to a
collectively recoiling medium. We present a systematic study of these phenomena
using a realistic medium evolution and a Monte-Carlo simulation of the
experimental trigger and show what information about the medium can be derived
from multiparticle correlations.


title:
Top quark spin correlations in the Randall-Sundrum model at the CERN
  Large Hadron Collider

abstract:
  In the Randall-Sundrum model, we study top-antitop pair production and top
spin correlations at the Large Hadron Collider. In addition to the Standard
Model processes, there is a new contribution to the top-antitop pair production
process mediated by graviton Kaluza-Klein modes in the s-channel. We calculate
the density matrix for the top-antitop pair production including the new
contribution. With a reasonable parameter choice in the Randall-Sundrum model,
we find a sizable deviation of the top-antitop pair production cross section
and the top spin correlations from those in the Standard Model. In particular,
resonant productions of the graviton Kaluza-Klein modes give rise to a
remarkable enhancement of such a deviation.


title: Scalar Dark Matter Effects in Higgs and Top Quark Decays

abstract:
  We study possible observational effects of scalar dark matter, the darkon D,
in Higgs h and top quark t decay processes, h->DD and t->cDD in the minimal
Standard Model (SM) and its two Higgs doublet model (THDM) extension
supplemented with a SM singlet darkon scalar field D. We find that the darkon D
can have a mass in the range of sub-GeV to several tens of GeV, interesting for
LHC and ILC colliders, to produce the required dark matter relic density. In
the SM with a darkon, t->cDD only occurs at loop level giving a very small
rate, while the rate for Higgs decay h->DD can be large. In THDM III with a
darkon, where tree level flavor changing neutral current (FCNC) interaction
exists, a sizable rate for t->cDD is also possible.


title: The Cornell Potential from General Geometries in AdS / QCD

abstract:
  We consider the heavy quark-antiquark potential in the AdS / QCD
correspondence, focusing in particular on a recently calculated AdS-like metric
deformed by back-reaction effects. We find that tuning the long-distance
behaviour of the potential leads to a discrepancy at small distances, and
discuss how to better constrain AdS / QCD geometries. A systematic comparison
of various geometries is presented, based on goodness of fit to lattice data in
the quenched approximation. The back-reacted geometry is seen to be
phenomenologically favoured over an alternative geometry with the same number
of parameters, although it does not perform as well as some other geometries.


title:
Multi-W Events at LHC from a Warped Extra Dimension with Custodial
  Symmetry

abstract:
  Randall-Sundrum models based on SU(2)_L * SU(2)_R with custodial symmetry are
compelling frameworks for building alternative models of electroweak symmetry
breaking. A particular feature of these models is the likely presence of light
Kaluza-Klein fermions related to the right-handed top quark. These can be as
light as a few hundred GeV and still compatible with EW precision constraints.
In this article, we study the detectability of four-W final states at the LHC,
which arise from the pair-production and tW decay of light Kaluza-Klein bottom
quarks as well as light Kaluza-Klein quarks carrying electric charge 5/3.


title:
A possible explanation of a broad $1^{--}$ resonant structure around
  1.5GeV

abstract:
  The broad $1^{--}$ resonant structure around 1.5GeV observed in the $K^+ K^-$
mass spectrum in $J/\psi\to K^+ K^-\pi^0$ by BESII is interpreted as a
composition of $\rho(1450)$ and $\rho(1700)$. Various tests are investigated.


title:
First correction to JIMWLK evolution from the classical equations of
  motion

abstract:
  We calculate some ${\cal O}(\alpha_s^2)$ corrections to the JIMWLK kernel in
the framework of the light-cone wave function approach to the high energy limit
of QCD. The contributions that we consider originate from higher order
corrections in the strong coupling and in the density of the projectile to the
solution of the classical Yang-Mills equations of motion that determine the
Weizs\"acker-Williams fields of the projectile. We study the structure of these
corrections in the dipole limit, showing that they are subleading in the limit
of large number of colours $N$, and that they cannot be fully recast in the
form of dipole degrees of freedom.


title:
On the absence and presence of pole(s) in fermion propagator in the
  simple model with mass generation

abstract:
  Within the Pauli-Villars regularization technique the fermion propagator is
studied in the framework of Schwinger-Dyson equations in the Euclidean space.
Making the generalization of Fukuda and Kugo proposals, the analytical
continuation is performed into the timelike region of fourmomenta. The massive
gauge boson kernel is considered and the fermion propagator pole structure is
discussed in detail.


title:
New Formulation of Causal Dissipative Hydrodynamics: Shock wave
  propagation

abstract:
  The first 3D calculation of shock wave propagation in a homogeneous QGP has
been performed within the new formulation of relativistic dissipative
hydrodynamics which preserves the causality. We found that the relaxation time
plays an important role and also affects the angle of Mach cone.


title: The hadronic contribution to (g-2) of the muon

abstract:
  The evaluation of the hadronic contribution to the muon magnetic anomaly
$a_\mu$ is revisited, taking advantage of new experimental data on $e^+e^-$
annihilation into hadrons: SND and CMD-2 for the $\pi^+\pi^-$ channel, and
\babar for multihadron final states. Discrepancies are observed between KLOE
and CMD-2/SND data, preventing one from averaging all the $e^+e^-$ results. The
long-standing disagreement between spectral functions obtained from $\tau$
decays and $e^+e^-$ annihilation is still present, and not accounted by
isospin-breaking corrections, for which new estimates have been presented. The
updated Standard Model value for $a_\mu$ based on $e^+e^-$ annihilation data is
now reaching a precision better than experiment, and it disagrees with the
direct measurement from BNL at the 3.3$\sigma$ level, while the $\tau$-based
estimate is in much better agreement. The $\tau$/$e^+e^-$ discrepancy, best
revealed when comparing the measured branching fraction for $\tau^- \to \pi^-
\pi^0 \nu_\tau$ to its prediction from the isospin-breaking-corrected $e^+e^-$
spectral function, remains a serious problem to be understood.


title: Precision Calculations for Future Colliders

abstract:
  I discuss the motivations for, and the status of, precision calculations for
the Large Hadron Collider (LHC) and the planned International Linear Collider
(ILC).


title:
CP Violation in Supersymmetric Theories: stop2->stop1 H H, stop2->stop1
  Z Z, stop2->stop1 W+ W-, stop2->stop1 Z H

abstract:
  We study the decays stop2->stop1 H H, stop2->stop1 Z Z, stop2->stop1 W+ W-
and stop2->stop1 Z H, with an eye towards measuring the CP-violating
supersymmetric parameters contained in these processes. We find that
stop2->stop1 H H tends to have the largest CP asymmetry and width, and is
perhaps the most favourable experimentally. These decays are sensitive
primarily to phi_At, the phase of the trilinear coupling A_t.


title: The Bulk RS KK-gluon at the LHC

abstract:
  We study the possibility of discovering and measuring the properties of the
lightest Kaluza-Klein excitation of the gluon in a Randall-Sundrum scenario
where the Standard Model matter and gauge fields propagate in the bulk. The
KK-gluon decays primarily into top quarks. We discuss how to use the $t
\bar{t}$ final states to discover and probe the properties of the KK-gluon.
Identification of highly energetic tops is crucial for this analysis. We show
that conventional identification methods relying on well separated decay
products will not work for heavy resonances but suggest alternative methods for
top identification for energetic tops. We find, conservatively, that resonances
with masses less than 5 TeV can be discovered if the algorithm to identify high
$p_T$ tops can reject the QCD background by a factor of 10. We also find that
for similar or lighter masses the spin can be determined and for lighter masses
the chirality of the coupling to $t\bar t$ can be measured. Since the energetic
top pair final state is a generic signature for a large class of new physics as
the top quark presumably couples most strongly to the electroweak symmetry
breaking sector, the methods we have outlined to study the properties of the
KK-gluon should also be important in other scenarios.


title: Interpretation of Recent SPS Dilepton Data

abstract:
  We summarize our current theoretical understanding of in-medium properties of
the electromagnetic current correlator in view of recent dimuon data from the
NA60 experiment in In(158 AGeV)-In collisions at the CERN-SPS. We discuss the
sensitivity of the results to space-time evolution models for the hot and dense
partonic and hadronic medium created in relativistic heavy-ion collisions and
the contributions from different sources to the dilepton-excess spectra.


title:
Quark spin content of the proton, hyperon semileptonic decays, and the
  decay width of the $\Theta^{+}$ pentaquark

abstract:
  Using the exisiting experimental data for hyperon semileptonic decays and the
flavor-singlet axial-vector charge $g_{A}^{(0)}$ from polarized deep inelastic
scattering of the proton, we derive the decay width of the $\Theta^{+}$
pentaquark baryon. We take into account the effects of flavor SU(3) symmetry
breaking within the framework of the chiral quark-soliton model. All dynamical
parameters of the model are fixed by using the five experimental hyperon
semileptonic decay constants and flavor singlet axial-vector charge. We obtain
the numerical results of the decay width of the $\Theta^{+}$ pentaquark baryon
as a function of the pion-nucleon sigma term $\Sigma_{\pi N}$ and investigate
the dependence of the decay width of the $\Theta^{+}$ on the $g_{A}^{(0)}$,
varying the $g_{A}^{(0)}$ within the range of the experimental uncertainty. We
demonstrate that the combined values of all known semileptonic decays with the
generally accepted value of $g_{A}^{(0)} \approx 0.3$ for the proton are
compatible with a small decay width $\Gamma_{\Theta KN}$ of the $\Theta^{+}$
pentaquark, i.e. $\Gamma_{\Theta KN} \leq 1$ MeV.


title:
Pair production of charged Higgs bosons in the Left-Right Twin Higgs
  model at the ILC and LHC

abstract:
  Left-Right twin Higgs(LRTH) model predicts the existence of a pair of charged
Higgs $\phi^{\pm}$. In this paper, we study the production of the charged Higgs
bosons pair $\phi^{\pm}$ via the process $e^{+}e^{-}\to \phi^{+}\phi^{-}$ at
the International Linear Collider(ILC). The numerical results show that the
production rates are at the level of several tens fb, this process can produce
the adequate distinct multi-jet final states and the SM background can be
efficiently reduced. We also discuss the charged Higgs boson pair production
via the process $q\bar{q}\to \phi^{+}\phi^{-}$ at the $CERN$ Large Hadron
Collider(LHC) and estimate there production rates. We find that, as long as the
charged Higgs bosons are not too heavy, they can be abundantly produced at the
LHC. The possible signatures of these new particles might be detected at the
ILC and LHC experiments.


title: ALEPH Tau Spectral Functions and QCD

abstract:
  Hadronic $\tau$ decays provide a clean laboratory for the precise study of
quantum chromodynamics (QCD). Observables based on the spectral functions of
hadronic $\tau$ decays can be related to QCD quark-level calculations to
determine fundamental quantities like the strong coupling constant, quark and
gluon condensates. Using the ALEPH spectral functions and branching ratios,
complemented by some other available measurements, and a revisited analysis of
the theoretical framework, the value $\asm = 0.345 \pm 0.004_{\rm exp} \pm
0.009_{\rm th}$ is obtained. Taken together with the determination of \asZ from
the global electroweak fit, this result leads to the most accurate test of
asymptotic freedom: the value of the logarithmic slope of $\alpha_s^{-1}(s)$ is
found to agree with QCD at a precision of 4%. The value of \asZ obtained from
$\tau$ decays is $\asZ = 0.1215 \pm 0.0004_{\rm exp} \pm 0.0010_{\rm th} \pm
0.0005_{\rm evol}
  = 0.1215 \pm 0.0012$.


title: The U(1)_A Anomaly and QCD Phenomenology

abstract:
  The role of the $U(1)_A$ anomaly in QCD phenomenology is reviewed, focusing
on the relation between quark dynamics and gluon topology. Topics covered
include a generalisation of the Witten-Veneziano formula for the mass of the
$\eta'$, the determination of pseudoscalar meson decay constants, radiative
pseudoscalar decays and the $U(1)_A$ Goldberger-Treiman relation. Sum rules are
derived for the proton and photon structure functions $g_1^p$ and $g_1^\c$
measured in polarised deep-inelastic scattering. The first moment sum rule for
$g_1^p$ (the `proton spin' problem) is confronted with new data from COMPASS
and HERMES on the deuteron structure function and shown to be quantitatively
explained in terms of topological charge screening. Proposals for experiments
on semi-inclusive DIS and polarised two-photon physics at future $ep$ and
high-luminosity $e^+ e^-$ colliders are discussed.


title: Is there New Physics in B Decays ?

abstract:
  Rare decays of the $B$ meson are sensitive to new physics effects. Several
experimental results on these decays have been difficult to understand within
the standard model (SM) though more precise measurements and a better
understanding of SM theory predictions are needed before any firm conclusions
can be drawn. In this talk we try to understand the present data assuming the
presence of new physics. We find that the data points to new physics of an
extended Higgs sector and we present a two higgs doublet model with a 2-3
flavor symmetry in the down type quark sector that can explain the deviations
from standard model reported in several rare B decays.


title:
Semileptonic Lambda(b)-->Lambda neutrino antineutrino decay in the
  Leptophobic Z-prime model

abstract:
  We study the exclusive flavor chancing neutral current process
Lambda(b)-->Lambda neutrino antineutrino in the leptophobic Z-prime model,
where charged leptons do not couple to the extra Z-prime boson. The branching
ratio, as well as, the longitudinal,transversal and normal polarizations are
calculated. It has been shown that all these physical observables are very
sensitive to the existence of new physics beyond the standard model and their
experimental measurements can give valuable information about it.


title:
Hierarchically Organized Iterative Solutions of the Evolution Equations
  in QCD

abstract:
  The task of Monte Carlo simulation of the evolution of the parton
distributions in QCD and of constructing new parton shower Monte Carlo
algorithms requires new way of organizing solutions of the QCD evolution
equations, in which quark-gluon transitions on one hand and quark-quark or
gluon-gluon transitions (pure gluonstrahlung) on the other hand, are treated
separately and differently. This requires certain reorganization of the
iterative solutions of the QCD evolution equations and leads to what we refer
to as a hierarchic iterative solutions of the evolution equations. We present
three formal derivations of such a solution. Results presented here are already
used in the other recent works to formulate new MC algorithms for the
parton-shower-like implementations of the QCD evolution equations. They are
primarily of the non-Markovian type. However, such a solution can be used for
the Markovian-type MCs as well. We also comment briefly on the relation of the
presented formalism to similar methods used in other branches of physics.


title:
Spin Filtering of Stored (Anti)Protons: from FILTEX to COSY to AD to
  FAIR

abstract:
  We review the theory of spin filtering of stored (anti)protons by multiple
passage through the polarized internal target (PIT). Implications for the
antiproton polarization buildup in the proposed PAX experiment at FAIR GSI are
discussed.


title:
Analysis of the vertices $\rho NN$, $\rho\Sigma\Sigma$ and $\rho\Xi\Xi$
  with light-cone QCD sum rules

abstract:
  In this article, we calculate the strong coupling constants of the $\rho NN$,
$\rho\Sigma\Sigma$ and $\rho\Xi\Xi$ in the framework of the light-cone QCD sum
rules approach. The strong coupling constants of the meson-baryon-baryon are
the fundamental parameters in the one-boson exchange model which describes the
baryon-baryon interactions successfully. The numerical values are in agreement
with the existing calculations in part. The electric and magnetic $F/(F+D)$
ratios deviate from the prediction of the vector meson dominance theory, the
SU(3) symmetry breaking effects are very large.


title:
Distribution amplitudes and decay constants for $(\pi,K,\rho,K^*)$
  mesons in light-front quark model

abstract:
  We present a calculation of the quark distribution amplitudes(DAs), the
Gegenbauer moments, and decay constants for $\pi,\rho,K$ and $K^*$ mesons using
the light-front quark model. While the quark DA for $\pi$ is somewhat broader
than the asymptotic one, that for $\rho$ meson is very close to the asymptotic
one. The quark DAs for $K$ and $K^*$ show asymmetric form due to the flavor
SU(3)-symmetry breaking effect. The decay constants for the transversely
polarized $\rho$ and $K^*$ mesons($f^T_\rho$ and $f^T_{K^*}$) as well as the
longitudinally polarized ones($f_\rho$ and $f_{K^*}$) are also obtained. Our
averaged values for $f^T_V/f_V$, i.e. $(f^T_\rho/f_\rho)_{\rm av}=0.78$ and
$(f^T_{K^*}/f_{K^*})_{\rm av}=0.84$, are found to be consistent with other
model predictions. Especially, our results for the decay constants are in a
good agreement with the SU(6) symmetry relation,
$f^T_{\rho(K^*)}=(f_{\pi(K)}+f_{\rho(K^*)})/2$.


title:
The BFKL Pomeron Calculus in zero transverse dimensions: summation of
  Pomeron loops and generating functional for the multiparticle production
  processes

abstract:
  In this paper we address two problems in the BFKL Pomeron calculus in zero
transverse dimensions: the summation of the Pomeron loops and the calculation
of the processes of multiparticle generation. We introduce a new generating
functional for these processes and obtain the evolution equation for it. We
argue that in the kinematic range given by $ 1 \ll \ln(1/\as^2) \ll \as Y \ll
\frac{1}{\as}$, we can reduce the Pomeron calculus to exchange of
non-interacting Pomerons with the renormalized amplitude of their interaction
with the target. Therefore, the summation of the Pomeron loops can be performed
using Mueller, Patel, Salam and Iancu approximation.


title: The neutron 'thunder' accompanying the extensive air shower

abstract:
  Simulations show that neutrons are the most abundant component among
extensive air shower hadrons. However, multiple neutrons which appear with long
delays in neutron monitors nearby the EAS core ('neutron thunder') are mostly
not the neutrons of the shower, but have a secondary origin. The bulk of them
is produced by high energy EAS hadrons hitting the monitors. The delays are due
to the termalization and diffusion of neutrons in the moderator and reflector
of the monitor accompanied by the production of secondary gamma-quanta. This
conclusion raises the important problem of the interaction of EAS with the
ground, the stuff of the detectors and their environment since they have often
hydrogen containing materials like polyethilene in neutron monitors. Such
interaction can give an additional contribution to the signal in the EAS
detectors. It can be particularly important for the signals from scintillator
or water tank detectors at km-long distances from the EAS core where neutrons
of the shower become the dominant component after a few mcsec behind the EAS
front.


title: Successful Yukawa structures in Warped Extra Dimensions

abstract:
  For a RS model, with SM fields in the bulk and the Higgs boson on the
TeV-brane, we suggest two specific structures for the Yukawa couplings, one
based on a permutation symmetry and the other on the Universal Strength of
Yukawa couplings hypothesis (USY). In USY, all Yukawa couplings have equal
strength and the difference in the Yukawa structure lies in some complex phase.
In both scenarios, all Yukawa couplings are of the same order of magnitude.
Thus, the main features of the fermion hierarchies are explained through the RS
geometrical mechanism, and not because some Yukawa coupling is extremely small.
We find that the RS model is particularly appropriate to incorporate the
suggested Yukawa configurations. Indeed, the RS geometrical mechanism of
fermion locations along the extra dimension, combined with the two Yukawa
scenarios, reproduces all the present experimental data on fermion masses and
mixing angles. It is quite remarkable that in the USY case, only two complex
phases of definite value +-Pi/2 are sufficient to generate the known neutrino
mass differences, while at same time, permitting large leptonic mixing in
agreement with experiment.


title: Is There Still a B -> pi K Puzzle?

abstract:
  We perform a fit to the 2006 B -> pi K data and show that there is a
disagreement with the standard model. That is, the B -> pi K puzzle is still
present. In fact, it has gotten worse than in earlier years. Assuming that one
new-physics (NP) operator dominates, we show that a good fit is obtained only
when the electroweak penguin amplitude is modified. The NP amplitude must be
sizeable, with a large weak phase.


title: Self-induced decoherence in dense neutrino gases

abstract:
  Dense neutrino gases exhibit collective oscillations where "self-maintained
coherence" is a characteristic feature, i.e., neutrinos of different energies
oscillate with the same frequency. In a non-isotropic gas, however, the flux
term of the neutrino-neutrino interaction has the opposite effect of causing
kinematical decoherence of neutrinos propagating in different directions, an
effect that is at the origin of the "multi-angle behavior" of neutrinos
streaming off a supernova core. We cast the equations of motion in a form where
the role of the flux term is manifest. We study in detail the symmetric case of
equal neutrino and antineutrino densities where the evolution consists of
collective pair conversions ("bipolar oscillations"). A gas of this sort is
unstable in that an infinitesimal anisotropy is enough to trigger a run-away
towards flavor equipartition. The "self-maintained coherence" of a perfectly
isotropic gas gives way to "self-induced decoherence."


title: Transversity and inclusive two-pion production

abstract:
  A model for dihadron fragmentation functions is briefly outlined, that
describes the fragmentation of a quark in two unpolarized hadrons. The
parameters are tuned to the output of the PYTHIA event generator for two-hadron
semi-inclusive production in deep inelastic scattering at HERMES. Then,
predictions are made for the unknown polarized fragmentation function and the
related single-spin asymmetry in the azimuthal distribution of $\pi^+ \pi^-$
pairs in semi-inclusive deep inelastic scattering on transversely polarized
targets at HERMES and COMPASS. This asymmetry can be used to extract the quark
transversity distribution.


title:
Has saturation physics been observed in deuteron-gold collisions at
  RHIC?

abstract:
  We have addressed the question of whether saturation (CGC) has been observed
in deuteron-gold collisions at RHIC. We have made a detailed analysis of the
Cronin peak characteristic of the nuclear modification factor measured for d-Au
collisions at mid-rapidity. The Cronin peak which is obtained around $p_t\simeq
3$ GeV may be reproduced at the proper height only by boosting the saturation
momentum by a huge non-perturbative additional component. At forward rapidity,
we get a quantitative agreement with data, reproducing hadron production
spectra and the $R_{CP}$ ratio using a recently developed description of the
small-x physics.


title:
A unified description of initial and final state interactions in heavy
  ion collisions

abstract:
  We have investigated the gauge field of a fast moving projectile passing
through a dense medium. We provide a simple and unified derivation, in light
cone gauge, of the gluon production cross-section in proton-nucleus (initial
state interactions), and the radiative gluon spectrum of a hard parton produced
in a nucleus-nucleus collision (final state interactions). Finally, we discuss
the validity of the eikonal approximation in proton-nucleus collisions at RHIC
energies.


title: Warped Gravitons at the LHC and Beyond

abstract:
  We study the production and decay of Kaluza-Klein (KK) gravitons at the Large
Hadron Collider (LHC), in the framework of a warped extra dimension in which
the Standard Model (SM) fields propagate. Such a scenario can provide solutions
to both the Planck-weak hierarchy problem and the flavor puzzle of the SM. In
this scenario, the production via $q \bar{q}$ annihilation and decays to the
conventional photon and lepton channels are highly suppressed. However, we show
that graviton production via gluon fusion followed by decay to longitudinal
$Z/W$ can be significant; vector boson fusion is found to be a sub-dominant
production mode. In particular, the ``golden'' $ZZ$ decay mode offers a
distinctive 4-lepton signal that could lead to the observation at the LHC with
300 fb$^{-1}$ (SLHC with 3 ab$^{-1}$) of a KK graviton with a mass up to $\sim
2$ ($\sim 3$) TeV for the ratio of the AdS$_5$ curvature to the Planck scale
modestly above unity. We argue that (contrary to the lore) such a size of the
curvature scale can still be within the regime of validity of the framework.
Upgrades beyond the SLHC luminosity are required to discover gravitons heavier
than $\sim 4$ TeV, as favored by the electroweak and flavor precision tests in
the simplest such models.


title:
New features in the simulation of neutrino oscillation experiments with
  GLoBES 3.0

abstract:
  We present Version 3.0 of the GLoBES (``General Long Baseline Experiment
Simulator'') software, which is a simulation tool for short- and long-baseline
neutrino oscillation experiments. As a new feature, GLoBES 3.0 allows for
user-defined systematical errors, which can also be used to simulate
experiments with multiple discrete sources and detectors. In addition, the
combination with external information, such as from different experiment
classes, is simplified. As far as the probability calculation is concerned,
GLoBES now provides an interface for the inclusion of non-standard physics
without re-compilation of the software. The set of experiment prototypes coming
with GLoBES has been updated. For example, built-in fluxes are now provided for
the simulation of beta beams.


title: Novel heavy flavor suppression mechanisms in the QGP

abstract:
  We revisit the question of the measured, unexpectedly large, heavy flavor
suppression, $R_{AA}(p_T) \ll 1$, in nucleus-nucleus collisions at RHIC and
compare two new theoretical approaches to the $D$- and $B$-meson quenching. In
the first model, radiative energy loss, collisional energy loss and heavy
quark-resonance interactions are combined to evaluate the drag and diffusion
coefficients in the quark-gluon plasma and the mixed phase. These are applied
in a relativistic Fokker-Planck equation to simulate the heavy $c$- and
$b$-quark suppression rate and elliptic flow $v_2(p_T)$. In the second model,
the fragmentation probability for heavy quarks and the medium-induced decay
probability for heavy hadrons are derived. These are implemented in a set of
coupled rate equations that describe the attenuation of the observable spectra
from the collisional dissociation of heavy mesons in the QGP. An improved
description of the non-photonic electron $R_{AA}(p_T)$ at RHIC can be obtained.
In contrast to previous results, the latter approach predicts suppression of
$B$-mesons comparable to that of $D$-mesons at transverse momenta as low as
$p_T \sim 10$ GeV.


title:
Leptogenesis implications in models with Abelian family symmetry and one
  extra real Higgs singlet

abstract:
  We show that the neutrino models, as suggested by Low, which have an
additional Abelian family symmetry and a real Higgs singlet to the default
see-saw do not hinder the possibility of successful thermal leptogenesis. For
these models (neglecting radiative effects), we have investigated the situation
of strong washout in both the one-flavor approximation and when flavor effects
are included. The result is that while such models predict that theta_{13}=0
and that one light neutrino to be massless, they do not modify or provide
significant constraints on the typical leptogenesis scenario where the final
asymmetry is dominated by the decays of the lightest right-handed neutrinos.


title:
The study of sq_L sq_L production at LHC in the l^\pm l^\pm channel and
  sensitivity to other models

abstract:
  $\tilde{q}_L \tilde{q}_L$ production is one of the main SUSY production
processes in the MSSM, which occurs due to the chirality flip caused by the
Majorana gluino mass. This process is one of the sources of same sign two
lepton (SS2$l$) events, however, gluino production also contributes to this
channel. In this paper, we develop a method to identify gluino and squark
production separately in the SS2$l$ channel, based on cuts on the kinematical
configuration of the jets. We applied the method to the MSSM, a model with an
extended gluino sector, and the Littlest Higgs model with T-parity (LHT), and
found a distinctive difference between these models when considering the
numbers of SS2$l$ events selected by the cuts.


title: Hadron-quark continuity induced by the axial anomaly in dense QCD

abstract:
  We investigate the interplay between the chiral and diquark condensates on
the basis of the Ginzburg-Landau potential with QCD symmetry. We demonstrate
that the axial anomaly drives a new critical point at low temperature in the
QCD phase diagram and leads to a smooth crossover between the hadronic and
color superconducting phases.


title:
What is the Criterion for a Strong First Order Electroweak Phase
  Transition in Singlet Models?

abstract:
  It is widely believed that the existence of singlet scalars in some Standard
Model extensions can easily make the electroweak phase transition strongly
first order, which is needed for the electroweak baryogenesis scenario. In this
paper, we will examine the strength of the electroweak phase transition in the
simplest extension of the Standard Model with a real singlet using the
sphaleron energy at the critical temperature. We find that the phase transition
is stronger by adding a singlet; and also that the criterion for a strong phase
transition Omega (Tc)/Tc>1, where Omega =(v^2+(x-x0)^2)^(1/2) and x (x0) is the
singlet vev in the broken (symmetric) phase, is not valid for models containing
singlets, even though often used in the literature. The usual condition vc/Tc>1
is more meaningful, and it is satisfied for a large part of the parameter space
for physically allowed Higgs masses.


title: Moderately light charged Higgs in \cp MSSM and NMSSM

abstract:
  In this talk I discuss some aspects of the phenomenology of a moderately
light charged Higgs ($H^\pm$) with a mass $\gts 130$ GeV, lighter than the top
quark, at the LHC. A charged Higgs in this mass range is still allowed in
next-to-minimal Supersymmetric Standard Model (NMSSM) at low $\tan \beta$ as
well as in CP-violating (\cp) Minimal Supersymmetric Standard Model (MSSM) for
a certain choice of \cp parameters, still respecting all the LEP-II bounds. In
both the cases, the $H^\pm$ has a large branching ratio in the $W^\pm \phi$
channel, where $\phi$ denotes a generic Higgs which is dominantly pseudoscalar
and hence may be substantially lighter than the LEP-II mass bound. This $\phi$
decays dominantly into a $b \bar b$ pair. Thus production of $H^\pm$ in the top
decay gives a striking $t \bar t$ signal at the LHC, where one of the top
quarks decays into the $bb \bar b W$ channel, via $t \to b H^\pm, H^\pm \to
\phi$ and $\phi \to b \bar b$. The characteristic correlation between the $b
\bar b$, $b \bar b W$ and $b b \bar b W$ invariant mass peaks helps reduce the
Standard Model (SM) background very effectively. For these low values of $\tan
\beta$ the $H^\pm \to \tau \nu_\tau $ channel does not provide any reach for
the $H^\pm$. Thus this is a signal for both a light charged $H^\pm$ and a light
$\phi$, which is mostly pseudoscalar in nature and decays dominantly into a $b
\bar b$ pair.


title: Detecting MeV Gauge Bosons With High-Energy Neutrino Telescopes

abstract:
  If annihilating MeV-scale dark matter particles are responsible for the
observed 511 keV emission from the Galactic bulge, then new light gauge bosons
which mediate the dark matter annihilations may have other observable
consequences. In particular, if such a gauge boson exists and has even very
small couplings to Standard Model neutrinos, cosmic neutrinos with ~TeV
energies will scatter with the cosmic neutrino background through resonant
exchange, resulting in a distinctive spectral absorption line in the
high-energy neutrino spectrum. Such a feature could potentially be detected by
future high-energy neutrino telescopes.


title: Can the Majoron be gauged away?

abstract:
  In a recent paper [Phys. Rev. D73, 075005 (2006)], the authors presented the
lepton number violation mechanism in the economic version of the 3-3-1 model,
without explicit pointing where the pseudo Goldstone Majoron lies. In this
comment we clarify this point and show an extended version of the model where
the Goldstone Majoron becomes a gauge away would be Majoron.


title: Migdal's model and holography

abstract:
  Migdal's model on the spectrum of vector mesons is reassessed. We discuss how
its departure from a Pade approximant is closely linked to the issue of
quark-hadron duality breakdown. We also show that Migdal's model is not truly a
model of large-Nc QCD.


title: Dark Matter and Collider Phenomenology of Universal Extra Dimensions

abstract:
  We review the phenomenology of models with flat, compactified extra
dimensions where all of the Standard Model fields are allowed to propagate in
the bulk, known as Universal Extra Dimensions (UED). UED make for an
interesting TeV-scale physics scenario, featuring a tower of Kaluza-Klein (KK)
states approximately degenerate in mass at the scale set by the inverse size of
the compactification radius. KK parity, the four-dimensional remnant of
momentum conservation in the extra dimensions, implies two basic consequences:
(1) contributions to Standard Model observables arise only at loop level, and
KK states can only be pair-produced at colliders, and (2) the lightest KK
particle (LKP) is stable, providing a suitable particle dark matter candidate.
After a theoretical overview on extra dimensional models, and on UED in
particular, we introduce the model particle spectrum and the constraints from
precision electroweak tests and current colliders data. We then give a detailed
overview of the LKP dark matter phenomenology, including the LKP relic
abundance, and direct and indirect searches. We then discuss the physics of UED
at colliders, with particular emphasis on the signatures predicted for the
Large Hadron Collider and at a future Linear Collider, as well as on the
problem of discriminating between UED and other TeV-scale new physics
scenarios, particularly supersymmetry. We propose a set of reference benchmark
models, representative of different viable UED realizations. Finally, we
collect in the Appendix all the relevant UED Feynman rules, the scattering
cross sections for annihilation and coannihilation processes in the early
universe and the production cross section for strongly interacting KK states at
hadron colliders.


title: Resonantly Enhanced Axion-Photon Regeneration

abstract:
  We point out that photon regeneration-experiments that search for the axion,
or axion-like particles, may be resonantly enhanced by employing matched
Fabry-Perot optical cavities encompassing both the axion production and
conversion magnetic field regions. Compared to a simple photon regeneration
experiment, which uses the laser in a single-pass geometry, this technique can
result in a gain in rate of order ${\cal F}^2$, where ${\cal F}$ is the finesse
of the cavities. This gain could feasibly be $10^{(10-12)}$, corresponding to
an improvement in sensitivity in the axion-photon coupling, $g_{a\gamma\gamma}$
, of order ${\cal F}^{1/2} \sim 10^{(2.5-3)}$, permitting a practical purely
laboratory search to probe axion-photon couplings not previously excluded by
stellar evolution limits, or solar axion searches.


title: U-Spin Tests of the Standard Model and New Physics

abstract:
  Within the standard model, a relation involving branching ratios and direct
CP asymmetries holds for the B-decay pairs that are related by U-spin. The
violation of this relation indicates new physics (NP). In this paper, we assume
that the NP affects only the Delta S = 1 decays, and show that the NP operators
are generally the same as those appearing in B -> pi K decays. The fit to the
latest B -> pi K data shows that only one NP operator is sizeable. As a
consequence, the relation is expected to be violated for only one decay pair:
Bd -> K0 pi0 and Bs -> Kbar0 pi0.


title: Two-body and Three-body Decays of Charginos in One-loop Order in MSSM

abstract:
  We present the renormalization scheme used in and the characteristic features
of GRACE/SUSY-loop, the package of the program for the automatic calculation of
the MSSM processes including one-loop order corrections. The two-body and
three-body decay widths of charginos in one-loop order evaluated by
GRACE/SUSY-loop are shown.


title: String theory and quark-gluon plasma

abstract:
  We review the AdS/CFT description of gauge theory plasmas for non-experts. We
discuss the low shear viscosity, jet quenching, and J/psi-suppression, which
are three major signatures for the quark-gluon plasma observed at RHIC
experiments.


title: Threshold Resummation for Slepton-Pair Production at Hadron Colliders

abstract:
  We present a first and extensive study of threshold resummation effects for
supersymmetric (SUSY) particle production at hadron colliders, focusing on
Drell-Yan like slepton-pair and slepton-sneutrino associated production. After
confirming the known next-to-leading order (NLO) QCD corrections and
generalizing the NLO SUSY-QCD corrections to the case of mixing squarks in the
virtual loop contributions, we employ the usual Mellin N-space resummation
formalism with the minimal prescription for the inverse Mellin-transform and
improve it by resumming 1/N-suppressed and a class of N-independent universal
contributions. Numerically, our results increase the theoretical cross sections
by 5 to 15% with respect to the NLO predictions and stabilize them by reducing
the scale dependence from up to 20% at NLO to less than 10% with threshold
resummation.


title: Probing Neutrino low energy and mass scales

abstract:
  Low energy neutrino processes are ideal probes for new Physics beyond the
Standard Model. Cosmological observations and rare nuclear processes can test
neutrino mass scales and give definite answers to unsolved basic questions like
the Majorana/Dirac nature of the neutrino.


title: Improved Determination of the CKM Angle alpha from B to pi pi decays

abstract:
  Motivated by a recent paper that compares the results of the analysis of the
CKM angle alpha in the frequentist and in the Bayesian approaches, we have
reconsidered the information on the hadronic amplitudes, which helps
constraining the value of alpha in the Standard Model. We find that the
Bayesian method gives consistent results irrespective of the parametrisation of
the hadronic amplitudes and that the results of the frequentist and Bayesian
approaches are equivalent when comparing meaningful probability ranges or
confidence levels. We also find that from B to pi pi decays alone the 95%
probability region for alpha is the interval [80^o,170^o], well consistent with
recent analyses of the unitarity triangle where, by using all the available
experimental and theoretical information, one gets alpha = (93 +- 4)^o. Last
but not least, by using simple arguments on the hadronic matrix elements, we
show that the unphysical region alpha ~ 0, present in several experimental
analyses, can be eliminated.


title: Particle creation and warm inflation

abstract:
  During cosmological inflation, it has been suggested that fields coupled to
the inflaton can be excited by the slow-rolling inflaton into a quasi-stable
non-vacuum state. Within this scenario of ``warm inflation'', this could allow
for a smooth transition to a radiation dominated Universe without a separate
reheating stage and a modification of the slow roll evolution, as the heat-bath
backreacts on the inflaton through friction. In order to study this from first
principles, we investigate the dynamics of a scalar field coupled to the
inflaton and N light scalar boson fields, using the 2PI-1/N expansion for
nonequilibrium quantum fields. As a first step we restrict ourselves to
Minkowski spacetime, interpret the inflaton as a time-dependent background, and
use vacuum initial conditions. We find that the dominant effect is particle
creation at late stages of the evolution due to the effective time-dependent
mass. The further transfer of energy to the light degrees of freedom and
subsequent equilibration only occurs after the end of inflation. As a
consequence, the adiabatic constraint, which is assumed in most studies of warm
inflation, is not satisfied when starting from an initial vacuum state.


title:
Effective degrees of freedom and gluon condensation in the high
  temperature deconfined phase

abstract:
  The Equation of State and the properties of matter in the high temperature
deconfined phase are analyzed by a quasiparticle approach for $T> 1.2~T_c$. In
order to fix the parameters of our model we employ the lattice QCD data of
energy density and pressure. First we consider the pure SU(3) gluon plasma and
it turns out that such a system can be described in terms of a gluon condensate
and of gluonic quasiparticles whose effective number of degrees of freedom and
mass decrease with increasing temperature. Then we analyze QCD with finite
quark masses. In this case the numerical lattice data for energy density and
pressure can be fitted assuming that the system consists of a mixture of gluon
quasiparticles, fermion quasiparticles, boson correlated pairs (corresponding
to in-medium mesonic states) and gluon condensate. We find that the effective
number of boson degrees of freedom and the in-medium fermion masses decrease
with increasing temperature. At $T \simeq 1.5 ~T_c$ only the correlated pairs
corresponding to the mesonic nonet survive and they completely disappear at $T
\simeq 2 ~T_c$. The temperature dependence of the velocity of sound of the
various quasiparticles, the effects of the breaking of conformal invariance and
the thermodynamic consistency are discussed in detail.


title:
Photon-tagged correlations in heavy-ion collisions: kinematic
  requirements and a case study

abstract:
  Photon-tagged correlations may be useful to determine how the dense partonic
medium produced in heavy-ion collisions affects the fragmentation of
high-energy quarks and gluons into a leading hadron. In these proceedings, I
discuss the kinematic requirements for the hadron and the prompt photon
transverse momentum cuts. A case study at LHC energy, tagging on p_T > 20 GeV
and p_T > 50 GeV photons, is then briefly examined.


title: Quarkonia and their transitions

abstract:
  Valuable data on quarkonia (the bound states of a heavy quark Q=c,b and the
corresponding antiquark) have recently been provided by a variety of sources,
mainly e+ e- collisions, but also hadronic interactions. This permits a
thorough updating of the experimental and theoretical status of electromagnetic
and strong transitions in quarkonia. We discuss QQbar transitions to other
QQbar states, with some reference to processes involving QQbar annihilation.


title:
Evolution of Mixed Dirac Particles Interacting with an External Magnetic
  Field

abstract:
  We study in the framework of relativistic quantum mechanics the evolution of
a system of two Dirac neutrinos that mix with each other and have non-vanishing
magnetic moments. The dynamics of this system in an external magnetic field is
determined by solving the Pauli-Dirac equation with a given initial condition.
We consider first neutrino spin-flavor oscillations in a constant magnetic
field and derive an analytical expression for the transition probability of
spin-flavor conversion in the limit of small magnetic interactions. We then
investigate ultrarelativistic neutrinos in an transversal magnetic field and
derive their wave functions and transition probabilities with no limitation for
the size of transition magnetic moments. Although we consider neutrinos, our
formalism is straightforwardly applicable to any spin-1/2 particles.


title:
Transition temperature in QCD with physical light and strange quark
  masses

abstract:
  We present results from a calculation of the transition temperature in QCD
with two light and one heavier (strange) quark mass on lattices with temporal
extent N_t =4 and 6. Calculations with improved staggered fermions have been
performed with a strange quark mass fixed close to its physical value and for
various light to strange quark mass ratios that correspond to light
pseudo-scalar masses in the range (150-500) MeV. From a combined extrapolation
to the chiral (m_l -> 0) and continuum (aT -> 0) limits we obtain for the
transition temperature at the physical point T_c = 192(7)(4) MeV.
  We also present first results from an ongoing calculation of the QCD equation
of state with almost realistic light and strange quark masses.


title: Gluonic phases, vector condensates, and exotic hadrons in dense QCD

abstract:
  We study the dynamics in phases with vector condensates of gluons (gluonic
phases) in dense two-flavor quark matter. These phases yield an example of
dynamics in which the Higgs mechanism is provided by condensates of gauge (or
gauge plus scalar) fields. Because vacuum expectation values of spatial
components of vector fields break the rotational symmetry, it is naturally to
have a spontaneous breakdown both of external and internal symmetries in this
case. In particular, by using the Ginzburg-Landau approach, we establish the
existence of a gluonic phase with both the rotational symmetry and the
electromagnetic U(1) being spontaneously broken. In other words, this phase
describes an anisotropic medium in which the color and electric
superconductivities coexist. It is shown that this phase corresponds to a
minimum of the Ginzburg-Landau potential and, unlike the two-flavor
superconducting (2SC) phase, it does not suffer from the chromomagnetic
instability. The dual (confinement) description of its dynamics is developed
and it is shown that there are light exotic vector hadrons in the spectrum,
some of which condense. Because most of the initial symmetries in this system
are spontaneously broken, its dynamics is very rich.


title: Doubly Heavy Baryon Production at \gamma \gamma Collider

abstract:
  The inclusive production of doubly heavy baryons $\Xi_{cc}$ and $\Xi_{bb}$ at
$\gamma\gamma$ collider is investigated. It is found that the contribution from
the heavy quark pair $QQ$ in color triplet and color sextet are important.


title: Couplings and spectra in modular inflation

abstract:
  We analyze how the spectrum of perturbations produced in a multi-component
modular inflation model proposed by Kadota and Stewart depends on couplings
between the two moduli. Although some simple direct couplings give essentially
the same results as the original model, $dn/d\ln k \propto n-1$, simple
indirect couplings produce a power law spectrum, $n-1 = \textrm{constant}$,
which can naturally be close to scale invariant.


title: Two-photon decays of hadronic molecules

abstract:
  In many calculations of the two--photon decay of hadronic molecules, the
decay matrix element is estimated using the wave function at the origin
prescription, in analogy to the two-photon decay of parapositronium. We
question the applicability of this procedure to the two-photon decay of
hadronic molecules for it introduces an uncontrolled model dependence into the
calculation. As an alternative approach, we propose an explicit evaluation of
the hadron loop. For shallow bound states, this can be done as an expansion in
powers of the range of the molecule binding force. In the leading order one
gets the well-known point-like limit answer. We estimate, in a self-consistent
and gauge invariant way, the leading range corrections for the two-photon decay
width of weakly bound hadronic molecules emerging from kaon loops. We find them
to be small. The role of possible short-ranged operators and of the width of
the scalars remains to be investigated.


title:
A simple evolution equation for rapidity distributions in
  nucleus-nucleus collisions

abstract:
  We explore the relationship between the Glasma framework and the String
Percolation Model by introducing a simple model for the rapidity distributions
in nucleus-nucleus collisions. The model is solved for both symmetrical and
asymmetrical collisions. The phenomenon of limiting fragmentation is briefly
discussed.


title:
Theoretical Review of $\gamma/\phi_3$ Measurements with $B_s$ Decays to
  Charm

abstract:
  We give an overview of various determinations of $\gamma/\phi_3$ with the
help of $B_s$ decays into charmed final states, distinguishing between
transitions with tree and penguin contributions and pure tree decays. In the
corresponding strategies, the $U$-spin flavour symmetry of strong interactions
provides a very useful tool, and offers interesting "by-producs" for the
$B$-physics programme at the LHC, including the control of the penguin
uncertainties in the determinations of the $B^0_d$-$\bar B^0_d$ and
$B^0_s$--$\bar B^0_s$ mixing phases $\phi_d$ and $\phi_s$ from $B_d\to J/\psi
K_S$ and $B_s\to J/\psi\phi$, respectively, and an alternative extraction of
the latter phase through $B_s\to D_s^+D_s^-$. Finally, we point out that the
cleanest determinations of the mixing phases $\phi_s$ and $\phi_d$ are offered
by the pure tree decays $B_s\to D_\pm K_{S(L)}$ and $B_d\to D_\pm\pi^0,
D_\pm\rho^0, ...$, respectively, which are very interesting for the searches of
new physics.


title: The B -> pi K Puzzle: A Status Report

abstract:
  We discuss the theoretical interpretation of the $B\to\pi K$ system in the
light of new data. Using the branching ratio and direct CP asymmetry of
$B^0_d\to\pi^-K^+$, the picture of the direct CP violation in
$B_d^0\to\pi^+\pi^-$ could be clarified: we predict
$A_{CP}^{dir}(B_d\to\pi^+\pi^-)=-0.24\pm0.04$, which favours the BaBar
measurement, and extract $\gamma=(70.0^{+3.8}_{-4.3})^\circ$, in agreement with
the Standard-Model fits of the unitarity triangle. All $B\to\pi K$ modes with
colour-suppressed electroweak penguin contributions are found in excellent
agreement with the Standard Model. The data for the ratios $R_{c,n}$ of the
charged and neutral $B\to\pi K$ branching ratios, which are sizeably affected
by electroweak penguin contributions, have moved quite a bit towards the
Standard-Model predictions, which are almost unchanged, thereby reducing the
"$B\to\pi K$ puzzle". On the other hand, the mixing-induced CP violation of
$B^0_d\to\pi^0 K_S$ still looks puzzling and could be accommodated through a
modified electroweak penguin sector with a large CP-violating new-physics
phase, while the observed non-vanishing difference between the direct CP
asymmetries of $B^\pm\to\pi^0K^\pm$ and $B_d\to\pi^\mp K^\pm$ seems to be
caused by hadronic and not by new physics.


title: Holographic QCD & Perfection

abstract:
  A holographic description of chiral symmetry breaking in the pattern of QCD
is reviewed. D7 brane probes are used to include quark fields in a simple
non-supersymmetric deformation of the AdS/CFT Correspondence. The axial
symmetry breaking is realized geometrically and the quark condensate and meson
masses are computable. Surprisingly, treating the model as a description of QCD
works quantitatively at the 15% level. Models of this AdS/QCD type typically
have a strongly coupled, conformal UV regime that is far from QCD. To
systematically move closer to QCD, we propose cutting out the large radius
gravitational description and matching operators and couplings at a finite UV
cut off in the spirit of a perfect lattice action. A simple example is
discussed.


title:
Compatibility of phenomenological dipole cross sections with the
  Balitsky-Kovchegov equation

abstract:
  Phenomenological models of the dipole cross section that enters in the
description of for instance deep inelastic scattering at very high energies
have had considerable success in describing the available small-x data in both
the saturation region and the so-called extended geometric scaling (EGS)
region. We investigate to what extent such models are compatible with the
numerical solutions of the Balitsky-Kovchegov (BK) equation which is expected
to describe the nonlinear evolution in x of the dipole cross section in these
momentum regions. We find that in the EGS region the BK equation yields results
that are qualitatively different from those of phenomenological studies. In
particular, geometric scaling around the saturation scale is only obtained at
asymptotic rapidities. We find that in this limit, the anomalous dimension
\gamma(r,x) of phenomenological models approaches a limiting function that is
universal for a large range of initial conditions. At the saturation scale,
this function equals approximately 0.44, in contrast to the value 0.628
commonly used in the models. We further investigate the dependence of these
results on the starting distribution, the small-r limit of the anomalous
dimension for fixed rapidities and the x-dependence of the saturation scale.


title: The Charm Parton Content of the Nucleon

abstract:
  We investigate the charm sector of the nucleon structure phenomenologically,
using the most up-to-date global QCD analysis. Going beyond the common
assumption of purely radiatively generated charm, we explore possible degrees
of freedom in the parton parameter space associated with nonperturbative
(intrinsic) charm in the nucleon. Specifically, we explore the limits that can
be placed on the intrinsic charm (IC) component, using all relevant
hard-scattering data, according to scenarios in which the IC has a form
predicted by light-cone wave function models; or a form similar to the light
sea-quark distributions. We find that the range of IC is constrained to be from
zero (no IC) to a level 2--3 times larger than previous model estimates. The
behaviors of typical charm distributions within this range are described, and
their implications for hadron collider phenomenology are briefly discussed.


title: Lightest Higgs Boson and Relic Neutralino in the MSSM with CP Violation

abstract:
  We discuss the lower bound to the lightest Higgs boson H_1 in the minimal
supersymmetric extension of the standard model (MSSM) with explicit CP
violation, and the phenomenology of the lightest relic neutralino in the same
scenario. In particular, adopting the CPX benchmark scenario, we find that the
combination of experimental constraints coming from LEP, Thallium Electric
Dipole Moment (EDM) measurements, quorkonium decays, and B_s -> mu mu decay
favours a region of the parameter space where the mass of H_1 is in the range 7
GeV < M_{H_1} < 10 GeV, while 3 < tan(beta) < 5. Assuming a departure from the
usual GUT relation among gaugino masses (|M_1| << |M_2|), we find that through
resonant annihilation to H_1 a neutralino as light as 2.9 GeV can be a viable
dark matter candidate in this scenario. We call this the CPX light neutralino
scenario, and discuss its phenomenology showing that indirect Dark Matter
searches are compatible with the present experimental constraints, as long as
m_\chi < M_{H_1}/2. On the other hand, part of the range m_\chi > M_{H_1}/2
which is allowed by cosmology is excluded by antiproton fluxes.


title:
A d-Au data-driven prediction of cold nuclear matter effects on $J/\psi$
  production in Au-Au collisions at RHIC

abstract:
  I present here a new Glauber-inspired approach to derive normal cold nuclear
matter effects on $J/\psi$ production in Au-Au collisions. In an as much as
possible model-independent way, it extrapolates the centrality dependent yields
from d-Au to Au-Au collisions. I then compare to the new Au-Au measurements
shown by the PHENIX experiment in this conference. In the most central
collisions, $J/\psi$ survival probabilities beyond cold nuclear matter effects
are found to be $44\pm23%$ at forward ($y=1.7$) and $25\pm12%$ at mid ($y=0$)
rapidities.


title: Instantons, Chiral Dynamics and Hadronic Resonances

abstract:
  We use the Interacting Instanton Liquid Model (IILM) as a tool to study the
role played by the chiral interactions in the lowest-lying vector and axial
vector meson resonances. We find that narrow a1 and rho meson resonances can be
generated by instanton-induced chiral forces, even in the absence of
confinement. In the IILM, these hadrons are found to have masses only about 30%
larger than the experimental value and small width <10-50 MeV. This result
suggests that chiral interactions are very important in these systems and
provide most of their mass. We explore the decaying patterns of the rho meson,
in the absence of confinement. We argue that, in our model where only chiral
forces are switched on, this meson decays dissociating into its quark
anti-quark constituents.


title:
A Missing Link Between Quark-Model Resonant States and Scattering-Matrix
  Singularities

abstract:
  For last two decades different quark models have predicted diverse, sometimes
contradictory collections of resonant states. To choose the best among them,
the obtained sets had to be compared to available experimental values. In the
absence of a more thorough understanding, quark-model resonant states have been
directly identified with scattering-matrix singularities. We demonstrate that
these are two closely related, but different physical quantities, and offer a
model based on the coupled-channel formalism to connect them in an unambiguous
way.


title: QCD at small x and nucleus-nucleus collisions

abstract:
  At large collision energy sqrt(s) and relatively low momentum transfer Q, one
expects a new regime of Quantum Chromo-Dynamics (QCD) known as "saturation".
This kinematical range is characterized by a very large occupation number for
gluons inside hadrons and nuclei; this is the region where higher twist
contributions are as large as the leading twist contributions incorporated in
collinear factorization. In this talk, I discuss the onset of and dynamics in
the saturation regime, some of its experimental signatures, and its
implications for the early stages of Heavy Ion Collisions.


title:
Spin matrix elements for the elastic proton-proton and proton-antiproton
  collisions

abstract:
  Motivated by the present extensive RHIC (BNL) spin program and further PAX
project at FAIR, we study the possibility of explicit reconstruction of full
set of helicity amplitudes by joint consideration of elastic proton-proton and
proton-antiproton scattering. Procedure is based on the derivative relations
for the helicity amplitudes, explicit parametrization of the leading spin
non-flip amplitudes and crossing - symmetry relations. Some preliminary results
are presented for the PAX energies to show the expected magnitudes of the spin
dependent observables as a functions of invariant Mandelstam's variables $s$
and $t$.


title: Unquenching the Quark Model

abstract:
  We present the formalism for a new generation of unquenched quark models in
which quark-antiquark pair effects are taken into account in an explicit form
via a microscopic QCD-inspired quark-antiquark creation mechanism. No
truncation in the sum over all the big tower of states is necessary since these
states are automatically generated by means of powerful group-theoretical
techniques. An important check on the formalism and the numerical results is
provided by the closure limit. As an application, the effect of quark-antiquark
pairs on the strange content of the proton spin, $\Delta s$, is discussed. The
contributions of the up and down quarks, $\Delta u$ and $\Delta d$, are also
calculated. This has become possible after solving the difficult problem of
permutational symmetry related to quark rearrangements. Finally, we present
some preliminary results in the closure limit as well as an outlook for future
applications.


title: Plasma induced fermion spin-flip conversion f_L -> f_R + gamma

abstract:
  The fermion spin-flip conversion f_L -> f_R + gamma is considered, caused by
the difference of the additional energies of the electroweak origin, acquired
by left- and right-handed fermions (neutrino, electron) in medium. An accurate
taking account of the fermion and photon dispersion in medium is performed. It
is shown that the threshold arises in the process, caused by the photon
(plasmon) effective mass. This threshold leaves no room for the so-called
``spin light of neutrino'' and ``spin light of electron'' in the real
astrophysical situations.


title: On the Feasibility of a Stop NLSP in Gravitino Dark Matter Scenarios

abstract:
  We analyze the possibility that the lighter stop {\tilde t_1} could be the
next-to-lightest supersymmetric particle (NLSP) in models where the gravitino
is the lightest supersymmetric particle (LSP). We do not find any possibility
for a stop NLSP in the constrained MSSM with universal input soft
supersymmetry-breaking masses at the GUT scale (CMSSM), but do find small
allowed regions in models with non-universal Higgs masses (NUHM). We discuss
the cosmological evolution of stop hadrons. Most {\tilde t_1}qq `sbaryons' and
the corresponding `antisbaryons' annihilate with conventional antibaryons and
baryons into {\tilde t_1}{\bar q} `mesinos' and the corresponding
`antimesinos', respectively, shortly after the quark-hadron transition in the
early Universe, and most mesinos and antimesinos subsequently annihilate. As a
result, insufficient metastable charged stop hadrons survive to alter Big Bang
nucleosynthesis.


title: High momentum lepton pairs from jet-plasma interactions

abstract:
  We discuss the emission of high momentum lepton pairs (p_T>4 GeV) with low
invariant masses (M << p_T) in central Au+Au collisions at RHIC
(\sqrt{s_{NN}}=200 GeV). The spectra of dileptons produced through interactions
of quark and antiquark jets with the quark-gluon plasma (QGP) have been
calculated. Annihilation and Compton scattering processes, as well as processes
benefitting from collinear enhancement, including Landau-Pomeranchuk-Migdal
(LPM) effects, are calculated and convolved with a one dimensional hydrodynamic
expansion. The jet-induced contributions are compared to thermal dilepton
emission and Drell-Yan processes, and are found to dominate around p_T=4 GeV.


title: Simple Scheme for Gauge Mediation

abstract:
  We present a simple scheme for constructing models that achieve successful
gauge mediation of supersymmetry breaking. In addition to our previous work [1]
that proposed drastically simplified models using metastable vacua of
supersymmetry breaking in vector-like theories, we show there are many other
successful models using various types of supersymmetry breaking mechanisms that
rely on enhanced low-energy U(1)_R symmetries. In models where supersymmetry is
broken by elementary singlets, one needs to assume U(1)_R violating effects are
accidentally small, while in models where composite fields break supersymmetry,
emergence of approximate low-energy U(1)_R symmetries can be understood simply
on dimensional grounds. Even though the scheme still requires somewhat small
parameters to sufficiently suppress gravity mediation, we discuss their
possible origins due to dimensional transmutation. The scheme accommodates a
wide range of the gravitino mass to avoid cosmological problems.


title: Partial waves and large $N_C$ resonance sum rules

abstract:
  Using $1/N_C$ expansion and dispersion theory techniques, without relying on
any explicit resonance lagrangian, we generalize the KSRF relation beyond the
leading chiral order. Two sum rules for the low energy constants $L_2$, $L_3$
and a new relation between resonance couplings are derived. A rather detailed
examination to the new relation is also given.


title: Gravitino dark matter in brane-world cosmology

abstract:
  The gravitino dark matter hypothesis in the brane cosmology is studied. The
theoretical framework is the CMSSM for particle physics and RS II brane model
for gravity. It is found that the gravitino can play the role of dark matter in
the universe and we determine what the gravitino mass should be for different
values of the five-dimensional Planck mass. An upper bound is obtained for the
latter.


title: The study of leading twist light cone wave functions of J/Psi meson

abstract:
  This paper is devoted to the study of leading twist light cone wave functions
of J/Psi meson. The moments of these wave functions have been calculated within
three approaches: potential models, nonrelativistic QCD and QCD sum rules.
Using the results obtained within these approaches the models for the light
cone wave functions of leading twist have been proposed. Similarly to the wave
function of eta_c meson the leading twist light cone wave functions of J/Psi
meson have very interesting properties at scales greater than m_c: improvement
of the accuracy of the model, appearance of relativistic tail and violation of
nonrelativistic QCD velocity scaling rules. The last two properties are the
properties of true leading twist light cone wave functions of J/Psi meson.


title: Probing the Stop Sector of the MSSM with the Higgs Boson at the LHC

abstract:
  We propose using the lightest CP-even Higgs boson in the minimal
supersymmetric standard model (MSSM) to probe the stop sector. Unlike measuring
stop masses in production/decay processes which requires knowledge of masses
and mixing angles of other superparticles, the strategy depends little on
supersymmetric parameters other than those in the stop sector in a large region
of parameter space. We show that measurements of the Higgs mass and the
production rate in the gluon fusion channel, the dominant channel at the LHC,
allow for determination of two parameters in the stop mass-squared matrix,
including the off-diagonal mixing term. This proposal is very effective when
stops are light and their mixing is large, which coincides with the region
where the electroweak symmetry breaking is minimally fine tuned. We also argue
that a lightest CP-even Higgs mass in the upper range of allowed values and a
production rate significantly smaller than in the standard model would be
difficult to reconcile within the MSSM, except in extreme corners of the
parameter space.


title:
The constraint on the spin dependent structure function $g_1$ at low
  $Q^2$ through the sum rule corresponding to the moment at $n=0$

abstract:
  The sum rules for the spin dependent structure function $g_1^{ab}$ in the
null-plane formalism corresponding to the moment at $n=0$ has been transformed
to the sum rule which relates the $g_1^{ab}$ with the cross section of the
isovector photon or the real photon. Based on these sum rules, we argue that
there is a deep connection among the elastic, the resonance, and the
non-resonant contributions, and that it explains why the sign of the
generalized Gerasimov-Drell-Hearn sum changes at very small $Q^2$.


title:
The sum rule for the polarized structure function $g_2$ corresponding to
  the moment at $n=0$

abstract:
  In the small $Q^2$ region, the sum rule for the polarized structure function
$g_2$ corresponding to the moment at $n=0$ is derived. This sum rule shows that
there is a tight connection among the resonances,the elastic and the continuum
in the $g_2$. Further, the Born term contribution in this sum rule is
proportional to $Q^2$ and very small compared with that in the corresponding
sum rule for the polarized structure function $g_1$. However, the Born term
contribution divided by $Q^2/2$ which also appears in the Schwinger sum rule
for the $g_2$ corresponding to the moment at $n=1$ has a very similar behavior
with that in the sum rule for the $g_1$ corresponding to the moment at $n=0$.


title: Thermalization and the chromo-Weibel instability

abstract:
  Despite the apparent success of ideal hydrodynamics in describing the
elliptic flow data which have been produced at Brookhaven National Lab's
Relativistic Heavy Ion Collider, one lingering question remains: is the use of
ideal hydrodynamics at times t < 1 fm/c justified? In order to justify its use
a method for rapidly producing isotropic thermal matter at RHIC energies is
required. One of the chief obstacles to early isotropization/thermalization is
the rapid longitudinal expansion of the matter during the earliest times after
the initial nuclear impact. As a result of this expansion the parton
distribution functions become locally anisotropic in momentum space. In
contrast to locally isotropic plasmas anisotropic plasmas have a spectrum of
soft unstable modes which are characterized by exponential growth of transverse
chromo-magnetic/-electric fields at short times. This instability is the QCD
analogue of the Weibel instability of QED. Parametrically the chromo-Weibel
instability provides the fastest method for generation of soft background
fields and dominates the short-time dynamics of the system.


title:
Hyperfine Structure and Zeeman Splitting in Two-Fermion Bound-State
  Systems

abstract:
  A relativistic wave equation for bound states of two fermions with arbitrary
masses which are exposed to a magnetic field is derived from quantum
electrodynamics. The interaction kernels are based upon the generalized
invariant M-matrices for inter-fermion and fermion-field interactions. As an
application we calculate the energy corrections in a weak homogeneous B field
to obtain the Zeeman splitting of the hyperfine structure and g-factors in the
lowest order (i.e. to alpha^4). Lande g-factors are presented for several of
the first excited states of hydrogen, muonium, and muonic-hydrogen.


title:
Status of the Hadronic Light-by-Light Contribution to the Muon Anomalous
  Magnetic Moment

abstract:
  We review the present status of the hadronic light-by-light contribution to
muon g-2 and critically compare recent calculations.


title: Reflective scattering from unitarity saturation

abstract:
  Proceeding from optical analogy we propose a new physical interpretation of
unitarity saturation leading to antishadowing as a reflective scattering. This
interpretation of antishadowing is related to the non-perturbative aspects of
strong interactions and follows from the specific property of the unitarity
saturation when elastic $S$-matrix $S(s,b)|_{b=0}\to -1$ at $s\to \infty$. The
analogy with Berry phase and experimental consequences of the proposed
interpretation as reflective scattering at the LHC and in the cosmic rays
studies are discussed.


title:
The productions of the top-pions and top-Higgs associated with the charm
  quark at the hadron colliders

abstract:
  In the topcolor-assistant technicolor (TC2) model, the typical physical
particles, top-pions and top-Higgs, are predicted and the existence of these
particles could be regarded as the robust evidence of the model. These
particles are accessible at the Tevatron and LHC, and furthermore the
flavor-changing(FC) feature of the TC2 model can provide us a unique chance to
probe them. In this paper, we study some interesting FC production processes of
top-pions and top-Higgs at the Tevatron and LHC, i.e., $c\Pi_{t}^{-}$ and
$c\Pi_{t}^{0}(h_{t}^{0})$ productions. We find that the light charged top-pions
are not favorable by the Tevatron experiments and the Tevatron has a little
capability to probe neutral top-pion and top-Higgs via these FC production
processes. At the LHC, however, the cross section can reach the level of
$10\sim 100$ pb for $c\Pi_t^-$ production and $ 10\sim 100$ fb for
$c\Pi_t^0(h_t^0)$ production. So one can expect that enough signals could be
produced at the LHC experiments. Furthermore, the SM background should be clean
due to the FC feature of the processes and the FC decay modes $\Pi_t^-\to
b\bar{c}, \Pi_t^0(h_t^0)\to t\bar{c}$ can provide us the typical signal to
detect the top-pions and top-Higgs. Therefore, it is hopeful to find the signal
of top-pions and top-Higgs with the running of the LHC via these FC processes.


title:
Pion-photon Transition Distribution Amplitudes in the Spectral Quark
  Model

abstract:
  The vector and axial pion-photon transition distribution amplitudes are
analyzed in the Spectral Quark Model. We proceed by the evaluation of double
distributions through the use of a manifestly covariant calculation based on
the alpha representation of propagators. As a result polynomiality is
incorporated and calculations become rather simple. Explicit formulas, holding
at the low-energy quark-model scale, are obtained. The corresponding form
factors for the anomalous decay pi0 -> gamma gamma* and the radiative pion
decays are also evaluated and confronted with the data.


title:
Photo-production of Positive Parity Excited Baryons in the 1/Nc
  Expansion of QCD

abstract:
  We analyze the photo-production helicity amplitudes for the positive parity
excited baryons in the context of the $1/N_c$ expansion of QCD. The results
show that sub-leading corrections in $1/N_c$ are important and that, while
1-body effective operators are dominant, there is some evidence for the need of
2-body effects.


title: Strong and Electromagnetic Mass Splittings in Heavy Mesons

abstract:
  The contributions to heavy meson mass differences by the strong hyperfine
interaction, the light quark masses and the electromagnetic interaction are
obtained from the empirical values of the $D$, $D^*$, $B$ and $B^*$ masses by
means of a mass formula based on the heavy quark mass expansion. The three
different types of contributions are determined with significant accuracy to
next to leading order in that expansion.


title: Associated Charmonium Production in p-pbar Annihilation

abstract:
  In this paper we summarize our recent results for low energy associated
charmonium production cross sections, using 1) crossing symmetry, and 2) an
explicit hadronic model. These predictions are of relevance to the planned
charmonium and charmonium hybrid production experiment PANDA at GSI.


title: Using jet mass to discover vector quarks at the LHC

abstract:
  We illustrate the utility of jet mass distributions as probes of new physics
at the LHC, focusing on a heavy vector-quark doublet that mixes with the top as
a concrete example. For 1 TeV vector-quark masses, we find that signals with
greater than 5 sigma significance can be achieved after 100 fb^-1. More
generally, jet mass distributions have the potential to provide signals for
heavy states that produce highly boosted weak gauge bosons and/or top quarks.


title: Quantum Corrections in the Resonance Chiral Theory

abstract:
  This PhD thesis is a first step towards the control of the quantum
corrections in the Resonance Chiral Theory, the suggested framework to handle
QCD in the resonance region. After a theoretical introduction, Chapter 3 is
devoted to calculate the vector form factor of the pion at the next-to-leading
order in the 1/N(C) expansion. The ultraviolet behaviour of the calculation is
analyzed, together with the needed counterterms in the renormalization
procedure. The long-distance limit allows to determine the resonance
contribution to the low-energy constants of Chiral Perturbation Theory at the
NLO in 1/N(C). In Chapter 4 a study of the two-body hadronic form factors from
large-N(C) QCD is shown. We present a dispersive method which allows to
investigate the chiral LECs and we perform a NLO calculation of the scalar and
pseudoscalar two-point functions. Imposing the correct QCD short-distance
constraints, one determines their difference Pi(t)=Pi_S(t)-Pi_P(t) in terms of
the pion decay constant and resonance masses. Its low-momentum expansion fixes
then the ChPT coupling L(8). In Chapter 5 we evaluate the beta-function at
one-loop of the resonance lagrangian with one multiplet of scalar and
pseudoscalar resonances, up to bilinear couplings in the resonance fields, by
using the background field method.


title: Strange and Heavy Flavoured Hypernuclei in Chiral Soliton Models

abstract:
  The extention of the chiral soliton approach to hypernuclei - strange or
heavy flavoured - becomes more reliable due to success in describing of other
properties of nuclei, e.g. the symmetry energy of nuclei with atomic numbers up
to ~30. The binding energies of the ground states of light hypernuclei with
strangeness S=-1 have been described in qualitative agreement with data. The
existence of charmed or beautiful hypernuclei and Theta-hypernuclei (strange,
charmed or beautiful) with large binding energy is expected within same
approach.


title: Mesonic screening masses at high temperature and finite density

abstract:
  We compute the first perturbative correction to the static correlation
lengths of light quark bilinears in hot QCD with finite quark chemical
potentials. The correction is small and positive, with mu-dependence depending
on the relative sign of chemical potentials and the number of dynamical
flavors. The computation is carried out using a three-dimensional effective
theory for the lowest fermionic Matsubara mode. We also compute the full
correlator in free theory and find a rather complicated general mu-dependence
at shorter distances. Finally, rough comparisons with lattice simulations are
discussed.


title:
Paramaterizations of inclusive cross sections for pion production in
  proton-proton collisions. II. Comparison to new data

abstract:
  A set of new, precise data have recently been made available by the NA49
collaboration for charged pion production in proton-proton and proton-Carbon
reactions at 158 GeV. The current paper compares this new data to five
currently available arithmetic parameterizations. Although a precise fit is not
expected, two of the parameterizations do not work very well but the other
three are able to provide a moderately good, but not precise fit to the
proton-proton data. The best two of these three parameterizations are scaled to
the proton-Carbon data and again provide a moderately good, but not precise
fit.


title: Erratum: New methods of testing Lorentz violation in electrodynamics

abstract:
  In an earlier paper [1] (hep-ph/0408006), the bound on the Standard Model
Extension photon-sector parameter $\tilde{\kappa}_{tr}$ [2] (hep-ph/0205211)
set by the heavy-ion storage-ring experiment of Saathoff et al. [3] was
incorrectly reported. We show that the correct bound on $\tilde{\kappa}_{tr}$
which resulted from this experiment is in fact $2.2\times 10^{-7}$.


title: Transverse momentum spectra of dileptons at NA60

abstract:
  Recently the NA60 collaboration has reported the transverse mass spectra of
dimuons coming from In-In collisions at 158 GeV/A. The measured yields display
a strong invariant mass dependence not typical of radial flow, suggesting that
different sources contribute in different mass regions. We interpret the dimuon
transverse mass spectra from an early thermalized partonic phase and hadronic
phase constrained by the strictures of broken chiral symmetry. Each phase
develops a specific transverse momentum dependence by hydrodynamical expansion.
We show that a measurement of the momentum anisotropy at NA60 could provide
information on the dominant emission source (hadronic or partonic) in the
intermediate mass region 1.5 <= M <= 3.0 GeV.


title: Shadow Higgs from a scale-invariant hidden $U(1)_s$ model

abstract:
  We study a scale invariant $SU(2)\times U(1)_Y \times U(1)_s$ model which has
only dimensionless couplings. The shadow $U(1)_s$ is hidden, and it interacts
with the Standard Model (SM) solely through mixing in the scalar sector and
kinetic mixing of the U(1) gauge bosons. The gauge symmetries are broken
radiatively by the Coleman-Weinberg mechanism. Lifting of the flat direction
results in a light shadow Higgs or "scalon", and a heavier scalar which we
identify as the SM Higgs boson. The phenomenology of this model is discussed.
It is possible that shadow Higgs boson can be discovered in precision $t$-quark
studies at the LHC. The conditions that it be a dark matter candidate is also
discussed.


title: Transverse spin effects of sea quarks in unpolarized nucleons

abstract:
  We calculate the non-zero Boer-Mulders functions of sea quarks inside the
proton in a meson-baryon fluctuation model. The results show that the
transverse spin effects of sea quarks in an unpolarized nucleon are sizable.
Using the obtained antiquark Boer-Mulders functions, we estimate the $\cos 2
\phi$ asymmetries in the unpolarized $pp$ and $p D$ Drell-Yan processes at FNAL
E866/NuSea experiments. The prediction for the $\cos 2 \phi$ asymmetries in the
unpolarized $pp$ Drell-Yan process at the BNL Relativistic Heavy Ion Collider
(RHIC) is also given.


title: The MSSM on the Interval

abstract:
  We review electroweak symmetry breaking in supersymmetric models with a
compact fifth dimension, the interval. We show how boundary conditions for
hypermultiplets can be obtained dynamically by brane mass terms and present
formulae for the spectrum in the presence of general bulk mass matrices. After
giving a brief overview on the literature of models, we describe in detail a
recently proposed model that at energies below the compactification scale
reduces to the MSSM with a very peculiar superpartner spectrum.


title: Mach Cones in Quark Gluon Plasma

abstract:
  The experimental azimuthal dihadron distributions at RHIC show a double peak
structure in the away side ($\Delta \phi = \pi \pm 1.2$ rad.) for intermediate
$p_t$ particles. A variety of models have appeared trying to describe this
modification. We will review most of them, with special emphasis in the Conical
Flow scenario in which the observed shape is a consequence of the emission of
sound by a supersonic high momentum particle propagating in the Quark Gluon
Plasma.