title: MSGUT : from Futility to Precision

abstract:
  We computed the complete gauge and chiral superheavy spectra and couplings in
the Minimal Susy GUT and therefrom evaluated the dependence of 1-loop threshold
corrections to the Weinberg angle and Unification scale as functions of the
single complex parameter $\xi$ that controls MSGUT symmetry breaking. The
corrections are generically within 10% showing that contrary to longstanding
conjectures,{\it{high precision calculations are not futile but necessary and
feasible in the SO(10) MSGUT.}} Effective superpotentials for $B-L$ violation
and mass formulae of the MSSM matter supermultiplets including neutrino Type I
and II seesaws were derived.


title:
Particle-Antiparticle Mixing, \epsilon_K and the Unitarity Triangle in
  the Littlest Higgs Model

abstract:
  We calculate the K^{0}-\bar{K}^{0}, B_{d,s}^{0}-\bar{B}_{d,s}^{0} mixing mass
differences \Delta M_K, \Delta M_{d,s} and the CP-violating parameter
\epsilon_{K} in the Littlest Higgs (LH) model. For f/v as low as 5 and the
Yukawa parameter x_L<0.8, the enhancement of \Delta M_{d} amounts to at most
20%. Similar comments apply to \Delta M_s and \epsilon_{K}. The correction to
\Delta M_{K} is negligible. The dominant new contribution in this parameter
range, calculated here for the first time, comes from the box diagrams with
(W_L^\pm,W_H^\pm) exchanges and ordinary quarks that are only suppressed by the
mass of W_H^\pm but do not involve explicit O(v^2/f^2) factors. This
contribution is strictly positive. The explicit O(v^2/f^2) corrections to the
SM diagrams with ordinary quarks and two W_L^\pm exchanges have to be combined
with the box diagrams with a single heavy T quark exchange for the GIM
mechanism to work. These O(v^2/f^2) corrections are found to be of the same
order of magnitude as the (W_L^\pm,W_H^\pm) contribution but only for x_L
approaching 0.8 they can compete with it. We point out that for x_L>0.85 box
diagrams with two T exchanges have to be included. Although formally
O(v^4/f^4), this contribution is dominant for x_L \approx 1 due to
non-decoupling of T that becomes fully effective only at this order. We
emphasize, that the concept of the unitarity triangle is still useful in the LH
model, in spite of the O(v^2/f^2) corrections to the CKM unitarity involving
only ordinary quarks. We demonstrate the cancellation of the divergences in box
diagrams that appear when one uses the unitary gauge for W_L^\pm and W_H^\pm.


title: Opening the Window for Technicolor

abstract:
  Recently a new class of technicolor models are proposed, using technifermions
of symmetric second-rank tensor. In the models, one can make reasonable
estimates of physical quantities like the Higgs mass and the size of oblique
corrections, using a correspondence to super Yang-Mills theory in the
Corrigan-Ramond limit. The models predict a surprisingly light Higgs of mass,
$m_H=150\sim 500 {\rm GeV}$ and have naturally small $S$ parameter.


title: Phenomenology of charmless hadronic B decays

abstract:
  The decays of $B$ mesons to a pair of charmless pseudoscalar mesons ($PP$
decays) or to a vector and pseudoscalar meson ($VP$ decays) have been analyzed
within the framework of flavor SU(3) symmetry and the Kobayashi-Maskawa
mechanism of CP violation. Separate $PP$ and $VP$ fits proved to be successful
in describing the experimental data (branching ratios, CP asymmetries and
time-dependent parameters). Decay magnitudes and relative weak and strong
phases have been extracted from the fits. Values of the weak phase $\gamma$
were found to be consistent with the current indirect bounds from other
analyses of CKM parameters.


title: Heavy Quark Symmetry in Isosinglet Nonleptonic B-Decays

abstract:
  We use a factorization theorem from the soft-collinear effective theory along
with heavy quark symmetry to make model independent predictions for B-> D^(*)M
where M={eta,eta',phi, omega}. Gluon production of these isosinglet mesons is
included. We predict the equality of branching fractions in the B-> DM and B->
D*M channels, with corrections at order LambdaQCD/Q and alphas(Q) where
Q=m_b,m_c, or E_M. We also predict that Br(B^0-> D eta')/Br(B^0-> D
eta)=tan^2(theta) = 0.67 and Br(B-> D phi)/Br(B-> D omega) < 0.2, where here
there are also alphas(sqrt{E*Lambda}) corrections. These results agree well
with the available data. A test for SU(3) violation in these decays is
constructed.


title:
Effects of atmospheric electric fields on detection of ultrahigh-energy
  cosmic rays

abstract:
  We show that atmospheric electric fields may affect the cosmic ray
observations in several ways and may lead to an overestimation of the cosmic
ray energies. The electric field in thunderclouds can be as high as a few
kV/cm. This field can accelerate the shower electrons and can feed some
additional energy into the shower. Therefore, ground array observations in
certain weather conditions may overestimate the energy of ultrahigh-energy
cosmic rays if they don't take this effect into account. In addition, the
electric field can bend the muon trajectories and affect the direction and
energy reconstruction of inclined showers. Finally, there is a possibility of
an avalanche multiplication of the shower electrons due to a runaway breakdown,
which may lead to a significant miscalculation of the cosmic ray energy.


title: Effects of Final State Interactions on Hadronic Charmless B Decays

abstract:
  Final-state rescattering effects on direct CP violation in charmless hadronic
B decays and on the polarization anomaly in $B\to\phi K^*$ are discussed.


title: Light Front Approach for Strong and Weak Decays of Pentaquarks

abstract:
  Strong and weak decays of pentaquarks are studied in the framework of the
light-front approach.


title: Parity-even and Parity-odd Mesons in Covariant Light-front Approach

abstract:
  Decay constants and form factors for parity-even (s-wave) and parity-odd
(p-wave) mesons are studied within a covariant light-front approach. The three
universal Isgur-Wise functions for heavy-to-heavy meson transitions are
obtained.


title:
Exclusive Semileptonic Rare Decays $B \to K^{(*)} l^+ l^-$ in a SUSY
  SO(10) GUT

abstract:
  In the SUSY SO(10) GUT context, we study the exclusive processes $B \to
K^{(*)} l^+l^-(l=\mu,\tau)$. Using the Wilson coefficients of relevant
operators including the new operators $Q_{1,2}^{(\prime)}$ which are induced by
neutral Higgs boson (NHB) penguins, we evaluate some possible observables
associated with these processes like, the invariant mass spectrum (IMS), lepton
pair forward backward asymmetry (FBA), lepton polarization asymmetries etc. In
this model the contributions from Wilson coefficients $C_{Q_{1,2}}^\prime$,
among new contributions, are dominant. Our results show that the NHB effects
are sensitive to the FBA, $dL/d\hat{s}$, and $dT/d\hat{s}$ of $B \to K^{(*)}
\tau^+ \tau^-$ decay, which are expected to be measured in B factories, and the
average of the normal polarization $dN/d\hat{s}$ can reach several percent for
$B \to K \mu^+ \mu^-$ and it is 0.05 or so for $B\to K \tau^+\tau^-$, which
could be measured in the future super B factories and provide a useful
information to probe new physics and discriminate different models.


title: Lepton Number Violation in Decays of Supersymmetric Particles

abstract:
  We discuss lepton flavour violating signals at the LHC in the framework of
supersymmetric theories. We consider R-parity conserving as well as R-parity
violating scenarios. In the case of R-parity conservation we show that in
decays of supersymmetric particles large regions in parameter exist where
lepton flavour violating decay modes have large branching ratios despite the
stringent constraints from the non-observation of rare lepton decays. We
discuss briefly some consequences for discovery potential and the measurements
of edge-variables at LHC within the SPS1a scenario. In the case of R-parity
violating scenarios we focus on bilinear R-parity violation. We discuss
correlations between the decays of the lightest neutralino and neutrino mixing
angles as well as the possibilities to measure these correlations at LHC.


title: Phenomenological Consequences of Soft Leptogenesis

abstract:
  Soft supersymmetry breaking terms involving heavy singlet sneutrinos can be
the dominant source of leptogenesis. The relevant range of parameters is
different from standard leptogenesis: a lighter Majorana mass, M < 10^9 GeV
(allowing a solution of the gravitino problem), and smaller Yukawa couplings,
Y_N < 10^{-4}. We investigate whether the various couplings of the singlet
sneutrinos, which are constrained by the requirement of successful `soft
leptogenesis', can have observable phenomenological consequences. Specifically,
we calculate the contributions of the relevant soft supersymmetric breaking
terms to the electric dipole moments of the charged leptons and to lepton
flavor violating decays. Our result is that these contributions are small.


title:
Estimates of the gluon concentrations in the confining SU(3)-Yang-Mills
  field for the first three states of charmonium

abstract:
  The estimates of the gluon concentrations in the classical SU(3)-Yang-Mills
field modelling confinement are given for the first three states of charmonium
whose spectrum is tuned by calculating electromagnetic transitions among the
mentioned levels in dipole approximation. For comparison the corresponding
estimates for the photon concentration in the ground state of positronium
(parapositronium and orthopositronium) are also adduced.


title:
Radiative parton energy loss and jet quenching in high-energy heavy-ion
  collisions

abstract:
  We study within the light-cone path integral approach [3] the effect of the
induced gluon radiation on high-p_{T} hadrons in high-energy heavy-ion
collisions. The induced gluon spectrum is represented in a new form which is
convenient for numerical simulations. For the first time, computations are
performed with a realistic parametrization of the dipole cross section. The
results are in reasonable agreement with suppression of high-p_{T} hadrons in
Au+Au collisions at \sqrt{s}=200 GeV observed at RHIC.


title: Present Status of Chiral Perturbation Theory

abstract:
  The basic ideas and methods of chiral perturbation theory are briefly
reviewed. I discuss the recent attempts to build an effective Lagrangian in the
resonance region and summarize the known large-N_C constraints on the
low-energy chiral couplings.


title:
New Higgs Effects in B--Physics in Supersymmetry with General Flavour
  Mixing

abstract:
  We investigate the effect of general flavour mixing among squarks on the rare
decays $\bar{B}\to X_s\gamma$, $\bar{B}_s\to\mu^+\mu^-$ and $\bar{B}_s-B_s$
mixing beyond the leading order in perturbation theory. We include all large
$\tan\beta$--enhanced corrections whilst also taking into account the effects
of general flavour mixing on the uncorrected quark mass matrix and ${\rm
SU}(2)_L\times{\rm U}(1)_Y$ breaking. For $\bar{B}_s\to\mu^+\mu^-$ and
$\bar{B}_s-B_s$ mixing we find that, in analogy to $\bar{B}\to X_s\gamma$,
there appears a focusing effect which can reduce the contribution due to the
$\delta_{RR}$ (and the $\delta_{LL}$) insertion by up to a factor of two at
large $\tan\beta$ and $\mu>0$. A dependence on $\delta_{LR}$ and $\delta_{RL}$,
that otherwise cancels to first order in the mass insertion approximation, is
also reintroduced. Taking into account the current experimental bounds on
$\Delta M_{B_s}$ and BR($\bar{B}_s\to\mu^+\mu^-$), we find that the insertions
$\delta_{RL}$ and $\delta_{RR}$ can be significantly constrained compared to
bounds obtained from $\bar{B}\to X_s\gamma$ only.


title: On similarities of bulk observables in nuclear and particle collisions

abstract:
  We study the regularities in the multiparticle production data obtained from
different types of collisions indicating the universality of the
hadroproduction process.
  The similarities of such bulk variables like the charged particle mean
multiplicity and the pseudorapidity density at midrapidity measured in
nucleus-nucleus, (anti)proton-proton and e+e- interactions are analysed
according to the dissipating energy of participants and their types.
  This approach shows a good agreement with the measurements in a wide range of
nuclear collision energies from AGS to RHIC. The predictions up to the LHC
energies are made and compared to experimental extrapolations.


title:
Spin structure of nucleon and spin transfer in high energy fragmentation
  process

abstract:
  Spin transfer in high energy fragmentation process is determined by the
hadronization mechanism and spin structure of hadrons.It can be studied by
measuring the polarizations of hyperons and/or vector mesons in e+e-
annihilation, in the current fragmentation region of polarized deeply inelastic
lN-scatterings, and high p_T-jets in polarized pp-collisions.Theoretical
calculations have been made using different models.In this talk, I will briefly
summarize the main features of the models, the results obtained and the
comparison with available data. They can be used for future tests by
experiments.


title: Scaling Laws for Non-Intercommuting Cosmic String Networks

abstract:
  We study the evolution of non-interacting and entangled cosmic string
networks in the context of the velocity-dependent one-scale model. Such
networks may be formed in several contexts, including brane inflation. We show
that the frozen network solution $L\propto a$, although generic, is only a
transient one, and that the asymptotic solution is still $L\propto t$ as in the
case of ordinary (intercommuting) strings, although in the present context the
universe will usually be string-dominated. Thus the behaviour of two strings
when they cross does not seem to affect their scaling laws, but only their
densities relative to the background.


title: Unravelling soft components in the shape function for inclusive B decays

abstract:
  In the heavy-quark limit, the decay spectrum for radiative and semileptonic
inclusive B-meson decays is determined by a universal structure function, i.e.
the shape function. We study the constraints on the bilocal heavy-quark
operator for the shape function from the QCD equations of motion and
heavy-quark symmetry, and we obtain a new basis of nonlocal operators that
reveals relevant soft components in the shape function. Those nonlocal
operators represent the ``kinetic energy distribution'' of the b-quark inside
the B-meson and the four-parton correlations with additional quarks and gluons.
A corresponding local operator basis relevant for relating the shape function
to HQET parameters is also given, and novel effects of the quark-gluon
correlations are discussed.


title: B and B_s decay constants from QCD Duality at three loops

abstract:
  Using special linear combinations of finite energy sum rules which minimize
the contribution of the unknown continuum spectral function, we compute the
decay constants of the pseudoscalar mesons B and B_s. In the computation, we
employ the recent three loop calculation of the pseudoscalar two-point function
expanded in powers of the running bottom quark mass. The sum rules show
remarkable stability over a wide range of the upper limit of the finite energy
integration. We obtain the following results for the pseudoscalar decay
constants: f_B=178 \pm 14 MeV and f_{B_s}=200 \pm 14 MeV. The results are
somewhat lower than recent predictions based on Borel transform, lattice
computations or HQET. Our sum rule approach of exploiting QCD quark hadron
duality differs significantly from the usual ones, and we believe that the
errors due to theoretical uncertainties are smaller.


title:
The influence of strange quarks on QCD phase diagram and chemical
  freeze-out: Results from the hadron resonance gas model

abstract:
  We confront the lattice results on QCD phase diagram for two and three
flavors with the hadron resonance gas model. Taking into account the
truncations in the Taylor-expansion of energy density $\epsilon$ done on the
lattice at finite chemical potential $\mu$, we find that the hadron resonance
gas model under the condition of constant $\epsilon$ describes very well the
lattice phase diagram. We also calculate the chemical freeze-out curve
according to the entropy density $s$. The $s$-values are taken from lattice QCD
simulations with two and three flavors. We find that this condition is
excellent in reproducing the experimentally estimated parameters of the
chemical freeze-out.


title: Progress in nonequilibrium quantum field theory II

abstract:
  We review recent developments for the description of nonequilibrium quantum
fields, continuing hep-ph/0302210.


title:
Implication of the weak phase $\beta$ measured in $B \to \rho \gamma$
  decay

abstract:
  We explore the exclusive $ B^0 \to \rho^0 \gamma$ decay to obtain the
time-dependent CP asymmetry in $b \to d \gamma$ decay process. We find that the
complex RL and RR mass insertion to the squark sector in the MSSM can lead to a
large deviation of CP asymmetry from that predicted in the Standard Model.


title: Numerical evaluation of non-infrared two-loop vertices

abstract:
  Some methods for the numerical computation of two-loop non-infrared vertices
are reviewed. A new method is also proposed and compared to the old ones.
Finally, some preliminary results are presented, concerning the evaluation of
the fermionic corrections to $\sin^2\theta_{\rm eff}^{\rm lept}$ through the
described techniques.


title: Isospin Breaking in $K\to3\pi$ Decays II: Radiative Corrections

abstract:
  The five different CP conserving amplitudes for the decays $K\to3\pi$ are
calculated using Chiral Perturbation Theory. The calculation is made to
next-to-leading order and includes full isospin breaking. The squared
amplitudes are compared with the corresponding ones in the isospin limit to
estimate the size of the isospin breaking effects. In this paper we add the
radiative corrections to the earlier calculated $m_u-m_d$ and local
electromagnetic effects. We find corrections of order 5-10 percent.


title:
Higgs boson self-couplings at the LHC as a probe of extended Higgs
  sectors

abstract:
  A study of two-Higgs-doublet models (2HDM) in the decoupling limit reveals
the existence of parameter configurations with a large triple-Higgs
self-coupling as the only low-energy trace of the departure from a Standard
Model (SM) Higgs sector. This observation encourages attempts to search for
double Higgs production at the Large Hadron Collider (LHC) even in mass regions
which have been shown to be very hard to probe in the context of SM-like Higgs
self-couplings. In this document we consider the case of an Intermediate Mass
Higgs (IMH) boson, with 120 GeV <= M_H <= 140 GeV, produced in pairs via
vector-vector fusion, Higgs-strahlung and associate production with
heavy-quarks and decaying into b anti-b pairs. After a detailed
signal-to-background analysis, we confirm that the observation of a Higgs-pair
signal is very challenging in the framework of the SM, even at the LHC with
upgraded luminosity. In contrast, we verify that the sensitivity is sufficient
to detect departures from the SM which would escape detection in the
measurements of the single-Higgs production channels.


title: Exotic baryon states in QCD sum rule

abstract:
  It is shown, that the small decay width of $\Theta^+ = uudd\bar{s}$ baryon is
suppressed by chirality violation. It is shown that $\Theta^+$ decay width
$\Gamma$ is proportional to $\alpha^2_s < 0 | \bar{q} q | 0 >^2$, for any
pentaquark current without derivatives.


title: Color Glass Condensate in QCD at High Energy

abstract:
  I give a brief review about the color glass condensate, which is the
universal form of hadrons and nuclei at high energies.


title: Phenomenological Application of $k_T$ factorization

abstract:
  We discuss applications of the perturbative QCD approach in the exclusive
non-leptonic two body B-meson decays. We briefly review its ingredients and
some important theoretical issues on the factorization approaches. PQCD results
are compatible with present experimantal data for the charmless B-meson decays.
We predict the possibility of large direct CP asymmetry in $B^0 \to
\pi^{+}\pi^{-}$ $(23\pm7 %)$ and $B^0\to K^{+}\pi^{-}$ $(-17\pm5%)$. We also
investigate the Branching ratios, CP asymmetry and isopsin symmetry breaking in
radiative $B \to (K^*/\rho) \gamma$ decays.


title: Heavy Mesons and Impact Ionization of Heavy Quarkonia

abstract:
  At the chiral restoration/deconfinement transition, most hadrons undergo a
Mott transition from being bound states in the confined phase to resonances in
the deconfined phase. We investigate the consequences of this qualitative
change in the hadron spectrum on final state interactions of charmonium in hot
and dense matter, and show that the Mott effect for D-mesons leads to a
critical enhancement of the J/$\psi$ dissociation rate. Anomalous J/psi
suppression in the NA50 experiment is discussed as well as the role of the Mott
effect for the heavy flavor kinetics in future experiments at the LHC. The
status of our calculations of heavy quarkonium dissociation cross sections due
to quark and gluon impact is reviewed, and estimates for in-medium effects due
to the lowering of the ionisation threshold are given.


title:
Transverse momentum spectra of fermions and bosons produced in strong
  abelian fields

abstract:
  We study the transverse momentum spectra of fermions and bosons produced in
strong, time-dependent abelian field. The transverse size of the abelian field
is finite, similarly to color strings and ropes. Different time-dependent field
strengths are investigated in a kinetic model, and transverse momentum spectra
are calculated for fermions and bosons. These spectra display exponential or
polynomial behavior at high p_T, depending on the given time dependence. We
compare our spectra to lattice result for a classical gluon field and obtain
surprisingly good agreement in certain cases.


title:
Summary of the Activities of the Working Group I on High Energy and
  Collider Physics

abstract:
  This is a summary of the projects undertaken by the Working Group I on High
Energy Collider Physics at the Eighth Workshop on High Energy Physics
Phenomenology (WHEPP8) held at the Indian Institute of Technology, Mumbai,
January 5-16, 2004. The topics covered are (i) Higgs searches (ii)
supersymmetry searches (iii) extra dimensions and (iv) linear collider.


title: Multiparticle production processes from the nonextensive point of view

abstract:
  We look at multiparticle production processes from the nonextensive point of
view. Nonextensivity means here the systematic deviations in exponential
formulas provided by the usual statistical approach for description of some
observables like transverse momenta or rapidity distributions. We show that
they can be accounted for by means of single parameter q with |q-1| being the
measure of nonextensivity. The whole discussion will be based on the
information theoretical approach to multiparticle processes proposed by us some
time ago.


title: On High Energy Scattering in Extra Dimensions

abstract:
  We analyze the behaviour of the high-energy scattering amplitude within the
brane world scenario in extra dimensions. We argue that contrary to the popular
opinion based on the Kaluza-Klein approach, the cross-section does not increase
with energy, but changes the slope close to the compactification scale and then
decreases like in the 4-dimensional theory. A particular example of the
quark-antiquark scattering due to the gluon exchange in the bulk is considered.


title:
Time dependent CP asymmetry in $B^0 \to \rho^0 \gamma$ decay to probe
  the origin of CP violation

abstract:
  Since the CP violation in the $B$ system has been investigated up to now only
through processes related to the $B$--$\bar{B}$ mixing, urgently required is
new way of study for the CP violation and establishing its origin in the $B$
system independent of the mixing process. In this work, we explore the
exclusive $ B^0 \to \rho^0 \gamma$ decay to obtain the time-dependent CP
asymmetry in $b \to d$ decay process in the standard model and the
supersymmetric model. We find that the complex RL and RR mass insertion to the
squark sector in the MSSM can lead to a large CP asymmetry in $b \to d \gamma$
decay through the gluino-squark diagrams, which is not predicted in the
Standard Model induced by the $B$--$\bar{B}$ mixing.


title: Warped Fermions and Precision Tests

abstract:
  We analyze the behavior of Standard Model matter propagating in a slice of
AdS_5 in the presence of infrared-brane kinetic terms. Brane kinetic terms are
naturally generated through radiative corrections and can also be present at
tree level. The effect of the brane kinetic terms is to expell the heavy KK
modes from the infrared-brane, and hence to reduce their coupling to the
localized Higgs field. In a previous work we showed that sizable gauge kinetic
terms can allow KK mode masses as low as a few TeV, compatible with present
precision measurements. We study here the effect of fermion brane kinetic terms
and show that they ameliorate the behavior of the theory for third generation
fermions localized away from the infrared brane, reduce the contribution of the
third generation quarks to the oblique correction parameters and mantain a good
fit to the precision electroweak data for values of the KK masses of the order
of the weak scale.


title: Impact Parameter Dependence in the Balitsky-Kovchegov Equation

abstract:
  We study the impact parameter dependence of solutions to the
Balitsky-Kovchegov (BK) equation. We argue that if the kernel of the BK
integral equation is regulated to cutoff infrared singularities, then it can be
approximated by an equation without diffusion in impact parameter. For some
purposes, when momentum scales large compared to $\Lambda_{QCD}$ are probed,
the kernel may be approximated as massless. In particular, we find that the
Froissart bound limit is saturated for physical initial conditions and seem to
be independent of the cutoff so long as the cutoff is sufficiently large
compared to the momentum scale associated with the large distance falloff of
the impact parameter distribution.


title:
Two loop renormalisation of the magnetic coupling in hot QCD and spatial
  Wilson loop

abstract:
  With the known two loop renormalisation of the magnetic coupling, the 4D
results of the spatial Wilson loop are compared to the prediction from the
magnetostatic sector.


title: Are the low-momentum gluon correlations semiclassically determined?

abstract:
  We argue that low-energy gluodynamics can be explained in terms of
semi-classical Yang-Mills solutions by demonstrating that lattice gluon
correlation functions fit to instanton liquid predictions for low energies and,
after cooling, in the whole range.


title: Supersymmetric Unification in Warped Space

abstract:
  Supersymmetric unification in warped space provides new possibilities for
model building. I argue that the picture of warped supersymmetric unification
arises naturally through the AdS/CFT correspondence from the assumption that
supersymmetry is dynamically broken at a scale about (10 - 100) TeV, and
present several fully realistic theories in this framework. In the minimal
model, the bulk SU(5) gauge group is broken at the Planck brane by boundary
conditions, while supersymmetry is broken at the TeV brane. The theory
preserves the successes of conventional supersymmetric unification, and yet
physics at accessible energies has a drastic departure from that of the
conventional scenario. There are also several variations of the minimal model
giving distinct phenomenologies. These theories can provide a basis for
phenomenological studies of dynamical supersymmetry breaking at low energies.


title: Cosmic String Evolution in Higher Dimensions

abstract:
  We obtain the equations of motion for cosmic strings in extensions of the 3+1
FRW model with extra dimensions. From these we derive a generalisation of the
Velocity-dependent One-Scale (VOS) model for cosmic string network evolution
which we apply, first, to a higher-dimensional isotropic $D+1$ FRW model and,
second, to a 3+1 FRW model with static flat extra dimensions. In the former
case the string network does not achieve a scaling regime because of the
diminishing rate of string intersections ($D>3$), but this can be avoided in
the latter case by considering compact, small extra dimensions, for which there
is a reduced but still appreciable string intercommuting probability. We note
that the velocity components lying in the three expanding dimensions are
Hubble-damped, whereas those in the static extra dimensions are only very
weakly damped. This leads to the pathological possibility, in principle, that
string motion in the three infinite dimensions can come to a halt preventing
the strings from intersecting, with the result that scaling is not achieved and
the strings irreversibly dominate the early universe. We note criteria by which
this can be avoided, notably if the spatial structure of the network becomes
essentially three-dimensional, as is expected for string networks produced in
brane inflation. Applying our model to a brane inflation setting, we find
scaling solutions in which the effective 3D string motion does not necessarily
stop, but it is slowed down because of the excitations trapped in the extra
dimensions. These effects are likely to influence cosmic string network
evolution for a long period after formation and we discuss their more general
implications.


title: A Fresh Look at Gauge Coupling Unification

abstract:
  The apparent unification of gauge couplings around 10^16 GeV is one of the
strong arguments in favor of Supersymmetric extensions of the Standard Model
(SM). In this contribution a new analysis, using the latest experimental data,
is performed. The strong coupling alpha_s emerges as the key factor for
evaluating the results of the fits, as the experimental and theoretical
uncertainties in its measurements are substantially higher than for the
electromagnetic and weak couplings. The present analysis pays special attention
to numerical and statistical details. The results, combined with the current
limits on the supersymmetric particle masses, favor a value for the SUSY scale
<~ 150 GeV and for alpha_s = 0.118-0.119.


title: Phenomenological aspects of CP violation

abstract:
  We present a pedagogical review of the phenomenology of CP violation, with
emphasis on B decays. Main topics include the phenomenology of neutral meson
systems, CP violation in the Standard Model of electroweak interactions, and B
decays. We stress the importance of the reciprocal basis, sign conventions,
rephasing invariance, general definitions of the CP transformation and the
spurious phases they bring about, CP violation as originating from the clash of
two contributions, the rho-eta plane, the four phases of a generalized CKM
matrix, and the impact of discrete ambiguities. Specific B decays are included
in order to illustrate some general techniques used in extracting information
from B physics experiments. We include a series of simple exercises. The style
is informal.


title: Electroweak Baryogenesis and New TeV Fermions

abstract:
  New fermions, strongly coupled to the Standard Model Higgs boson provide a
well motivated extension of the Standard Model (SM). In this work we show that,
once new physics at heavier scales is added to stabilize the Higgs potential,
such an extension of the SM can strengthen the first order electroweak phase
transition and make the electroweak baryogenesis mechanism feasible. We propose
a SM extension with TeV Higgsinos, Winos and Binos that satisfy the following
properties: a) The electroweak phase transition is strong enough to avoid
sphaleron erasure in the broken phase for values of the Higgs mass mH < 300
GeV; b) It provides large CP-violating currents that lead to the observed
baryon asymmetry of the Universe for natural values of the CP-violating phase;
c) It also provides a natural Dark Matter candidate that can reproduce the
observed dark matter density; d) It is consistent with electroweak precision
measurements; e) It may arise from a softly broken supersymmetric theory with
an extra (asymptotically free) gauge sector; e) It may be tested by electron
electric dipole moment experiments in the near future.


title: Detectability of Upgoing Sleptons

abstract:
  Some supersymmetric models predicted long lived charged sleptons. Following
Albuquerque, Burdman and Chacko \cite{albu}, we consider an exact process where
the $ \widetilde{\tau}$, the supersymmetry partner of $\tau$ lepton, are
produced inside the earth by collisions of high energy neutrinos with nucleons.
We detailedly investigate the possible signals of upgoing $ \widetilde{\tau}$
by comparing with the background muons where atmospheric neutrino flux is taken
into account. The realistic spectra shows that km-scale experiments could see
as many as 69 events a year by using the Waxman-Bahcall limit on the
extraterrestrial neutrino flux.


title: Three-flavor analysis of long-baseline experiments

abstract:
  We compare the analysis of existing and future neutrino oscillation
long-baseline experiments, where we point out that the analysis of future
experiments actually implies a 12-dimensional parameter space. Within the
three-flavor neutrino oscillation framework, six of these parameters are the
fit parameters, and six are the simulated parameters. This high-dimensional
parameter space requires the condensation of information and the definition of
performance indicators for the purpose needed. As the most sophisticated
example for such an indicator, we choose the precision of the leptonic CP
phase, and discuss some of the complications of its computation and
interpretation.


title: Determining SUSY and Higgs Parameters in the MSSM and its Extensions

abstract:
  If supersymmetry (SUSY) is realized at the electroweak scale, its underlying
structure and breaking mechanism may be explored with great precision by a
future linear $e^+ e^-$ collider (LC) with a clean environment, tunable
collision energy, high luminosity polarized beams, and additional $e^-e^-$,
$e\gamma$ and $\gamma\gamma$ modes. We review a few recent developments for
determining fundamental SUSY and Higgs parameters, measuring CP violating $H/A$
mixing in the decoupling regime and probing the next--to--minimal
supersymmetric standard model at the LC.


title: The Cosmological Evolution of Domain Wall Networks

abstract:
  We have studied the cosmological evolution of domain wall networks in two,
three and four spatial dimensions using high-resolution field theory
simulations. The dynamical range and number of our simulations is larger than
in previous works, but does not allow us to exclude previous hints of
deviations to the naively expected scale-invariant evolution. These results
therefore suggest that the approach of domain wall networks to linear scaling
is a much slower process than that of cosmic strings, which has been previously
characterized in detail.


title: Bose-Einstein correlations in the Quantum Clan Approach

abstract:
  We propose novel numerical method of modelling Bose-Einstein correlations
(BEC) observed among identical (bosonic) particles produced in multiparticle
production reactions. We argue that the most natural approach is to work
directly in the momentum space in which Bose statistics of secondaries reveals
itself in their tendency to bunch in a specific way in the available phase
space. Because such procedure is essentially identical to the clan model of
multiparticle distributions proposed some time ago, therefore we call it the
Quantum Clan Model.


title:
Cosmic Ray Signals from Mini Black Holes in Models with Extra
  Dimensions: An Analytical/Monte Carlo Study

abstract:
  We present a study of the multiplicities, of the lateral distributions and of
the ratio of the electromagnetic to the hadronic components in the air showers,
generated by the collision in the atmosphere of an incoming high energy cosmic
ray and mediated by the formation of a mini black hole, predicted in TeV scale
gravity models with large extra dimensions. The analysis is performed via a
large scale simulation of the resulting cascades over the entire range
($10^{15}-10^{19}$eV) of ultra high initial energies, for several values of the
number of large extra dimensions, for a variety of altitudes of the initial
interaction and with the energy losses in the bulk taken into account. The
results are compared with a representative of the standard events, namely the
shower due to the collision of a primary proton with a nucleon in the
atmosphere. Both the multiplicities and the lateral distribution of the showers
show important differences between the two cases and, consequently, may be
useful for the observational characterization of the events. The
electromagnetic/hadronic ratio is strongly fluctuating and, thus, less decisive
for the altitudes considered.


title: Supersymmetry at the Linear Collider

abstract:
  If supersymmetry (SUSY) is realized at the electroweak scale, its underlying
structure and breaking mechanism may be explored with great precision by a
future linear $e^+ e^-$ collider (LC) with a clean environment, tunable
collision energy, high luminosity polarized beams, and additional $e^-e^-$,
$e\gamma$ and $\gamma\gamma$ modes. In this report we summarize four papers
submitted to the ICHEP04 conference about the precise measurements of the top
squark parameters and $\tan\beta$, the impacts of the CP phases on the search
for top/bottom squarks, the Majorana nature and CP violation in the neutralino
system, the implications of the SUSY dark matter scenario for the LC
experiments, and the characteristics of the neutralino sector of the
next--to--minimal supersymmetric standard model at the LC


title: Hadronic vs leptonic flavor and CP violation in SUSY SO(10)

abstract:
  We study hadronic and leptonic flavor physics in a SUSY SO(10) model proposed
by Chang, Masiero, and Murayama, which links b -> s transitions to the observed
large atmospheric neutrino mixing angle. We find large effects in B_s-B_s-bar
mixing and BR(tau -> mu gamma) and comment on B_d -> phi K_S.


title: Charmed quark component of the photon wave function

abstract:
  We determine the c-anti-c component of the photon wave function on the basis
of (i) the data on the transitions e+ e- -> J/psi(3096), psi(3686), psi(4040),
psi(4415), (ii) partial widths of the two-photon decays eta_{c0}(2979),
chi_{c0}(3415), chi_{c2}(3556) -> gamma-gamma, and (iii) wave functions of the
charmonium states obtained by solving the Bethe-Salpeter equation for the
c-anti-c system. Using the obtained c-anti-c component of the photon wave
function we calculate the gamma-gamma decay partial widths for radial
excitation 2S state, eta_{c0}(3594) -> gamma-gamma, and 2P states
chi_{c0}(3849), chi_{c2}(3950) -> gamma-gamma.


title: Seesaw mechanism and the baryon asymmetry

abstract:
  I review the present understanding of connection between the non-zero
neutrino masses and the baryon asymmetry of the Universe. The state-of-art
results are presented for the standard thermal leptogenesis.


title: Lepton Masses and Mixings in Next-to-minimal Supersymmetric SO(10) GUT

abstract:
  A simple extension of the minimal renormalizable supersymmetric SO(10) grand
unified theory by adding a 120-dimensional Higgs representation is examined.
This brings new antisymmetric contributions to the relevant quark and lepton
mass sum rules and leads to a better fit of the measured values of lepton
masses and mixings together with a natural completion of the renormalizable
Higgs sector within the SUSY SO(10) framework.


title: Physics Interplay of the LHC and the ILC

abstract:
  Physics at the Large Hadron Collider (LHC) and the International e+e- Linear
Collider (ILC) will be complementary in many respects, as has been demonstrated
at previous generations of hadron and lepton colliders. This report addresses
the possible interplay between the LHC and ILC in testing the Standard Model
and in discovering and determining the origin of new physics. Mutual benefits
for the physics programme at both machines can occur both at the level of a
combined interpretation of Hadron Collider and Linear Collider data and at the
level of combined analyses of the data, where results obtained at one machine
can directly influence the way analyses are carried out at the other machine.
Topics under study comprise the physics of weak and strong electroweak symmetry
breaking, supersymmetric models, new gauge theories, models with extra
dimensions, and electroweak and QCD precision physics. The status of the work
that has been carried out within the LHC / LC Study Group so far is summarised
in this report. Possible topics for future studies are outlined.


title: Nuclear Parton Densities and Structure Functions

abstract:
  We calculate nuclear parton distribution functions (PDFs), using the
constituent quark model. We find the bounded valon distributions in a nuclear
to be related to free valon distributions in a nucleon. By using improved
bounded valon distributions for a nuclear with atomic number $A$ and the
partonic structure functions inside the valon, we can calculate the nuclear
structure function in $x$ space. The results for nuclear structure-function
ratio $F_2^A/F_2^D$ at some values of $A$ are in good agreement with the
experimental data.


title: The Supersymmetric Fat Higgs

abstract:
  Supersymmetric models have traditionally been assumed to be perturbative up
to high scales due to the requirement of calculable unification. In this note I
review the recently proposed `Fat Higgs' model which relaxes the requirement of
perturbativity. In this framework, an NMSSM-like trilinear coupling becomes
strong at some intermediate scale. The NMSSM Higgses are meson composites of an
asymptotically-free gauge theory. This allows us to raise the mass of the
Higgs, thus alleviating the MSSM of its fine tuning problem. Despite the strong
coupling at an intermediate scale, the UV completion allows us to maintain
gauge coupling unification.


title: Theoretical status of the top quark cross section

abstract:
  We discuss the most recent calculations of the top quark total cross section
and transverse momentum distributions at the Tevatron and the LHC. These
calculations include the soft-gluon corrections at next-to-next-to-leading
order (NNLO). The soft NNLO corrections stabilize the scale dependence of the
cross section.


title: A possible gateway to eta_b: chi_{b0}(2P) -> eta eta_b

abstract:
  It is argued that the branching ratio for the decay chi_{b0}(2P) -> eta eta_b
can reach few permil as a result of the enhancement of the eta emission by the
axial anomaly in QCD. This might make the discussed process practical for an
experimental search for the eta_b.


title: Leptogenesis and $\mu-\tau$ symmetry

abstract:
  If an exact $\mu\leftrightarrow \tau$ symmetry is the explanation of the
maximal atmospheric neutrino mixing angle, it has interesting implications for
origin of matter via leptogenesis in models where small neutrino masses arise
via the seesaw mechanism. For seesaw models with two right handed neutrinos
$(N_\mu, N_\tau)$, lepton asymmetry vanishes in the exact $\mu\leftrightarrow
\tau$ symmetric limit, even though there are nonvanishing Majorana phases in
the neutrino mixing matrix. On the other hand, for three right handed neutrino
models, lepton asymmetry nonzero and is given directly by the solar mass
difference square. We also find an upper bound on the lightest neutrino mass.


title: Symmetries of the Standard Model

abstract:
  I present an overview of the standard model, concentrating on its global
continuous symmetries, both exact and approximate. There are four lectures,
dedicated to spacetime symmetry, flavor symmetry, custodial symmetry, and scale
symmetry. Topics include Weyl, Majorana, and Dirac spinors; massive neutrinos;
electroweak symmetry breaking; effective field theory; and the hierarchy
problem.


title: Determining alpha and gamma - theory

abstract:
  In this short review presented at FPCP04, Daegu, Korea, we discuss methods
leading to determinations of alpha and gamma with practically no theoretical
error. The remaining theoretical errors due to isospin breaking, neglecting of
electroweak penguins or coming from other sources are addressed.


title: Open Charm and Beauty at Ultrarelativistic Heavy Ion Colliders

abstract:
  Important goals of RHIC and LHC experiments with ion beams include the
creation and study of new forms of matter, such as the Quark Gluon Plasma.
Heavy quark production and attenuation will provide unique tomographic probes
of that matter. We predict the suppression pattern of open charm and beauty in
$Au+Au$ collisions at RHIC and LHC energies based on the DGLV formalism of
radiative energy loss. A cancelation between effects due to the $\sqrt{s}$
energy dependence of the high $p_T$ slope and heavy quark energy loss is
predicted to lead to surprising similarity of heavy quark suppression at RHIC
and LHC.


title: Physics Beyond the Standard Model: Focusing on the Muon Anomaly

abstract:
  We present a model based on the implication of an exceptional E_{6}-GUT
symmetry for the anomalous magnetic moment of the muon. We follow a particular
chain of breakings with Higgses in the 78 and 351 representations. We analyse
the radiative correction contributions to the muon mass and the effects of the
breaking of the so-called Weinberg symmetry. We also estimate the range of
values of the parameters of our model.


title: Effective Lagrangian for Charged Higgs Couplings

abstract:
  The effective Lagrangian including one loop corrections is deduced for the
couplings of the charged Higgs with quarks and leptons, and with charginos and
neutralinos. The effect of the one loop corrections is found to be quite
significant in a number of sectors. The effective Lagrangian is then used to
analyze the decay of the charged Higgs into a number of decay channels.
Specifically we consider the decay of $H^+(H^-)$ into the decay modes $t\bar b$
($\bar t b$), $\bar\tau\nu_{\tau}$ ($\tau \bar \nu_{\tau}$), and
$\chi_i^+\chi_j^0(\chi_i^-\chi_j^0)$ (i=1,2; j=1-4). The loop corrections to
these decay modes are also found to be quite significant lying in the range
20-30% in significant regions of the parameter space of the SUGRA model. The
effects of CP phases on the effective Lagrangian and on the branching ratios
are also analysed and these effects found to be important.


title: Transverse momentum resummation at small x for the Tevatron and LHC

abstract:
  Analysis of semi-inclusive DIS hadroproduction suggests broadening of
transverse momentum distributions at $x$ below a few $10^{-3}$, which can be
modeled in the Collins-Soper-Sterman formalism by a modification of
impact-parameter-dependent parton densities. We discuss the consequences of
such a modification for the production of electroweak bosons at hadron-hadron
colliders. If substantial small-$x$ broadening is observed in forward Z boson
production in the Tevatron Run-2, it will strongly affect predicted transverse
momentum distributions for W, Z, and Higgs boson production at the Large Hadron
Collider.


title: KN and KbarN Elastic Scattering in the Quark Potential Model

abstract:
  The KN and KbarN low-energy elastic scattering is consistently studied in the
framework of the QCD-inspired quark potential model. The model is composed of
the t-channel one-gluon exchange potential, the s-channel one-gluon exchange
potential and the harmonic oscillator confinement potential. By means of the
resonating group method, nonlocal effective interaction potentials for the KN
and KbarN systems are derived and used to calculate the KN and KbarN elastic
scattering phase shifts. By considering the effect of QCD renormalization, the
contribution of the color octet of the clusters (qqbar) and (qqq) and the
suppression of the spin-orbital coupling, the numerical results are in fairly
good agreement with the experimental data.


title: Theory of the endpoint region of exclusive rare B decays

abstract:
  In the ratio of ratios of rates for radiative and semileptonic decays of B
and D to K* and rho mesons the non-computable form factors mostly cancel out.
The resulting method for the determination of Vub is largely free of hadronic
uncertainties, raising the prospect of a precise determination of Vub.


title:
Some Issues Related to the Direct Detection of SUSY Dark Matter
  Detection

abstract:
  Since the expected rates for neutralino-nucleus scattering are expected to be
small, one should exploit all the characteristic signatures of this reaction.
Such are: (i) In the standard recoil measurements the modulation of the event
rate due to the Earth's motion. (ii) In directional recoil experiments the
correlation of the event rate with the sun's motion. One now has both
modulation, which is much larger and depends not only on time, but on the
direction of observation as well, and a large forward-backward asymmetry. (iii)
In non recoil experiments gamma rays following the decay of excited states
populated during the Nucleus-LSP collision. Branching ratios of about 6 percent
are possible.


title:
The Need for a Photon-Photon Collider in addition to LHC & ILC for
  Unraveling the Scalar Sector of the Randall-Sundrum Model

abstract:
  In the Randall-Sundrum model there can be a rich new phenomenology associated
with Higgs-radion mixing. A photon-photon collider would provide a crucial
complement to the LHC and a future ILC collider for fully determining the
parameters of the model and definitively testing it.


title: An analysis of f_0-sigma mixing in light cone QCD sum rules

abstract:
  We investigate f_0-sigma mixing in the framework of light cone QCD sum rules
and by employing the experimental results about the decay widths and the masses
of these scalar mesons we estimate the scalar mixing angle by using sigma meson
data and f_0 meson data. The two values we thus obtain of the scalar mixing
angle are not entirely consistent with each other, possibly indicating that the
structure of these mesons cannot be simple quark-antiquark states.


title:
Unitarity violation of the CKM matrix in a nonuniversal gauge
  interaction model

abstract:
  We explore the unitarity violation of the CKM matrix in the model in which
the third generation fermions are subjected to the separate SU(2)$_L$ gauge
interaction. With the recent LEP and SLC data at $Z$-pole and low-energy
neutral current interaction data, the analysis on the parameter space of the
model is updated, and the unitary violation is predicted under the constraint.


title:
Charged Lepton Flavour and CP Violations: Theoretical Impact of Present
  and Future Experiments

abstract:
  We shortly review and emphasize how l_j -> l_i gamma experiments and the
searches for lepton e.d.m. are constraining New Physics model building. They
are pure signals of new phenomena around the TeV scale since the SM
contributions are definitely negligible. It is quite remarkable that they also
give effective tests of the LFV & CPV in seesaw couplings and in grand-unified
theories. In particular, the limits on d_e nicely complement the proton decay
bounds in selecting O(10) models.


title: Gauge Symmetry Breaking with a Large Mass Hierarchy

abstract:
  We propose a higher dimensional scenario to solve the gauge hierarchy
problem. In our formulation, a crucial observation is that a supersymmetric
structure is hidden in the 4d spectrum of any gauge invariant theories with
compact extra dimensions and that the gauge symmetry breaking is directly
related to the supersymmetry breaking.


title: Analysis of Exotic Hybrid eta pion, eta-prime pion Decays

abstract:
  Investigations of the mass and decays of the exotic hybrid are reviewed,
including calculation of the pion1 to eta pion, eta-prime pion decay widths
within the QCD sum rules technique. In this calculation, the recently-proposed
eta, eta-prime quark mixing scheme is employed. The results indicate that the
decay width Gamma(pion1 to eta pion) around 250 MeV is large compared with the
decay width Gamma(pion1 to eta-prime pion) around 20 MeV. Inspired by these
results, some phenomenological approaches are suggested to gain an
understanding of the underlying mechanism of eta pion and eta-prime pion hybrid
decays.


title: SUSY: Theory Status in the Light of Experimental Constraints

abstract:
  Supersymmetry remains compelling theory over 30 years in spite of lack of its
discovery. It could be already near the corner our days, therefore present and
upcoming experiments are crucial for constraining or even discovery of the
supersymmetry.


title:
Systematic Approach to Gauge-Invariant Relations between Lepton Flavor
  Violating Processes

abstract:
  We analyze four-lepton contact interactions that lead to lepton flavor
violating processes, with violation of individual family lepton number but
total lepton number conserved. In an effective Lagrangian framework, the
assumption of gauge invariance leads to relations among branching ratios and
cross sections of lepton flavor violating processes. In this paper, we work out
how to use these relations systematically. We also study the consequences of
loop-induced processes.


title: Magnetized birefringence and CMB polarization

abstract:
  The polarization plane of the cosmic microwave background radiation can be
rotated either in a magnetized plasma or in the presence of a quintessential
background with pseudoscalar coupling to electromagnetism. A unified treatment
of these two phenomena is presented for cold and warm electron-ion plasmas at
the pre-recombination epoch. The electron temperature is only relevant to the
relativistic correction of the cold plasma results. The spectrum of plasma
excitations is obtained from a generalized Appleton--Hartree equation,
describing simultaneously the high-frequency propagation of electromagnetic
waves in a magnetized plasma with a dynamical quintessence field. It is shown
that these two effects are comparable for the plausible range of parameters
allowed by present constraints. It is then argued that the generalized
expressions derived in the present study may be relevant for direct searches of
a possible rotation of the cosmic microwave background polarization.


title:
Quark Effects in the Gluon Condensate Contribution to the Scalar
  Glueball Correlation Function

abstract:
  One-loop quark contributions to the dimension-four gluon condensate term in
the operator product expansion (OPE) of the scalar glueball correlation
function are calculated in the MS-bar scheme in the chiral limit of $n_f$ quark
flavours. The presence of quark effects is shown not to alter the cancellation
of infrared (IR) singularities in the gluon condensate OPE coefficients. The
dimension-four gluonic condensate term represents the leading power corrections
to the scalar glueball correlator and, therein, the one-loop logarithmic
contributions provide the most important condensate contribution to those QCD
sum-rules independent of the low-energy theorem (the subtracted sum-rules).


title:
Transversity in the chiral quark--soliton model and single spin
  asymmetries

abstract:
  A short review of single spin asymmetries in deep inelastic semi-inclusive
processes, connected with prediction of chiral quark-soliton model for the
nucleon transversity distributions, its possible theoretical understanding in
the framework of QCD-induced approach and arising difficulties is given.


title: On the BELLE Charmonium States

abstract:
  It is shown that newly performed experimental studies by the Belle
Collaboration are excellently incorporated in the unified picture for hadron
spectra developed early. From our analysis it follows that the measured values
for the masses of the BELLE states exactly coincide with the calculated masses
of the states living in the corresponding KK towers.


title:
Measuring the fermionic couplings of the Higgs boson at future colliders
  as a probe of a non-minimal flavor structure

abstract:
  We study the fermionic couplings of the neutral Higgs bosons in the THDM,
assuming a four-texture structure for the Yukawa matrices. We then derive the
low-energy constraints on the model, focusing in b-quark and lepton physics,
and apply them to study Higgs boson detection at future colliders.


title: Conditions driving chemical freeze-out

abstract:
  We propose the entropy density as the thermodynamic condition driving best
the chemical freeze-out in heavy-ion collisions. Taking its value from lattice
calculations at zero chemical potential, we find that it is excellent in
reproducing the experimentally estimated freeze-out parameters. The two
characteristic endpoints in the freeze-out diagram are reproduced as well.


title: Isospin quantum number of D_{s0}^+(2317)

abstract:
  The D_s^+ pi^0 and D_s^{*+} gamma decays of the D_{s0}^+(2317) are studied by
assigning it to various charmed strange scalar mesons. As a result, it is found
that its assignment to an iso-triplet four-quark meson is favored by the
severest experimental constraint on the ratio of the rates for these decays,
while assigning it to an I=0 state (a four-quark or a conventional {c\bar{s}})
is inconsistent with this constraint.


title: Theta++ from QCD sum rule

abstract:
  We study the pentaquark $uudd\bar s$ with $J=3/2$ and I=1 ($\Theta^{++}$) in
the QCD sum rule approach. We derive the QCD sum rules for positive and
negative parity states of the pentaquark. The QCD sum rule predicts that there
exists $\Theta^{++}$ with negative parity and its mass is $1.5\sim1.6$ GeV. The
negative parity $\Theta^{++}$ can be extremely narrow, since it lies much below
the $\Delta K$ threshold and the decay into $KN$ state is strongly suppressed
due to the $D$-wave centrifugal barrier. Also, the possibility of the existence
of the $\Theta^{++}$ with positive parity is not excluded. Although it nearly
degenerates with the negative parity state, it may be broader than the negative
parity state.


title: Instanton in Euclidean non-abelian field of point-like source

abstract:
  {(Anti-)instanton behaviour in Euclidean non-abelian field of the point-like
source is studied by analyzing the possible (anti-)instanton deformations as
resulted from the variations of its characteristic parameters. The variational
principle for searching such crumpled topological configurations is formulated
and the problem is resolved then algebraically by the Ritz method (multipole
expansion of the deformation fields). The region of (anti-)instanton parameters
relevant to the instanton liquid model is investigated in detail. The
approximate efficacious method to include such configurations contributing to
the appropriate partition function is proposed and verified. Evaluating average
energy of Euclidean non-abelian point-like source in the instanton environment
(liquid) is performed within the superposition ansatz for the corresponding
solutions of the Yang-Mills equations. For the colour singlet dipole this
energy escalates linearly with the separation increasing and its tension
coefficient develops the magnitude commensurate with that as inferred from
lattice QCD.


title: Strangeness and charm in QCD matter

abstract:
  Strangeness and charm degrees of freedom in strongly interacting matter are
discussed within a quasi-particle model adjusted to lattice QCD data. The model
allows to extrapolate lattice QCD data to large baryo-chemical potential. We
outline the thermal evolution of matter in the early universe at and slightly
after confinement and comment briefly on charm dynamics in relativistic
heavy-ion collisions.


title:
NJL-model description of Goldstone boson condensation in the
  color-flavor locked phase

abstract:
  A schematic NJL-type model is employed to investigate kaon and pion
condensation in deconfined quark matter in the color-flavor locked (CFL) phase,
explicitly referring to quark degrees of freedom. To that end we allow for
non-vanishing pseudoscalar diquark condensates in addition to the scalar ones
which constitute the CFL phase. Color neutrality is ensured by the appropriate
choice of color chemical potentials. The dependence of the free energy in the
Goldstone condensed phases on quark masses and charge chemical potentials is
found to be in good qualitative -- in most cases also quantitative -- agreement
with the predictions obtained within the effective Lagrangian approach.


title: Numerical modelling of quantum statistics in high-energy physics

abstract:
  Numerical modelling of quantum effects caused by bosonic or fermionic
character of secondaries produced in high energy collisions of different sorts
is at the moment still far from being established. In what follows we propose
novel numerical method of modelling Bose-Einstein correlations (BEC) observed
among identical (bosonic) particles produced in such reactions. We argue that
the most natural approach is to work directly in the momentum space of produced
secondaries in which the Bose statistics reveals itself in their tendency to
bunch in a specific way in the available phase space. Fermionic particles can
also be treated in similar fashion.


title: A New Neutrino Cross Section Database

abstract:
  We describe a new web based data resource being developed to provide access
to accurate and validated cross sections of low energy neutrino and
antineutrino interactions. The proposed content of this database are outlined
which cover total and differential cross from inclusive, quasi-elastic and
exclusive pion production processes from charged and neutral current
interactions. Efforts to obtain these data, which come mainly from old bubble
chamber experiments, are described as well as the implementation of an
embryonic web site to make the resource generally accessible.


title:
Phenomenological Applications of $k_T$-Factorization (--Large Direct
  CP-Asymmetry in B-meson Decays--)

abstract:
  We discuss applications of the perturbative QCD approach in the exclusive
non-leptonic two body B-meson decays. We briefly review its ingredients and
some important theoretical issues on the factorization approaches. PQCD results
are compatible with present experimantal data for the charmless B-meson decays.
We predict the possibility of large direct CP asymmetry in $B^0 \to
\pi^{+}\pi^{-}$ $(23\pm7 %)$ and $B^0\to K^{+}\pi^{-}$ $(-17\pm5%)$. We also
investigate the Branching ratios, CP asymmetry and isopsin symmetry breaking in
$B \to (K^*/\rho) \gamma$ decays and look for the possible new physics
contribution via gluino mediation SUSY which can accomodate the large deviation
of $S_{\phi K_s}$ from SM.}


title: Meissner masses in the gCFL phase of QCD

abstract:
  We calculate the Meissner masses of gluons in neutral three-flavor color
superconducting matter for finite strange quark mass. In the CFL phase the
eissner masses are slowly varying function of the strange quark mass. For large
strange quark mass, in the so called gCFL phase, the Meissner masses of gluons
with colors $a=1,2,3$ and 8 become imaginary, indicating an instability.


title: Search and identification of extra spatial dimensions at LHC

abstract:
  We present an analysis, based on the center-edge asymmetry, to distinguish
effects of extra dimensions within the Arkani-Hamed-Dimopoulos-Dvali (ADD) and
Randall-Sundrum (RS) scenarios from other new physics effects in lepton-pair
production at the CERN Large Hadron Collider LHC. Spin-2 and spin-1 exchange
can be distinguished up to an ADD cutoff scale, M_H, of about 5 TeV, at the 95%
CL. In the RS scenario, spin-2 resonances can be identified in most of the
favored parameter space.


title: What is the meaning of the statistical hadronization model?

abstract:
  The statistical model of hadronization succeeds in reproducing particle
abundances and transverse momentum spectra in high energy collisions of
elementary particles as well as of heavy ions. Despite its apparent success,
the interpretation of these results is controversial and the validity of the
approach very often questioned. In this paper, we would like to summarize the
whole issue by first outlining a basic formulation of the model and then
comment on the main criticisms and different kinds of interpretations, with
special emphasis on the so-called "phase space dominance". While the ultimate
answer to the question why the statistical model works should certainly be
pursued, we stress that it is a priority to confirm or disprove the fundamental
scheme of the statistical model by performing some detailed tests on the rates
of exclusive channels at lower energy.


title: Description of Gluon Propagation in the Presence of an A^2 Condensate

abstract:
  There is a good deal of current interest in the condensate A^2 which has been
seen to play an important role in calculations which make use of the operator
product expansion. That development has led to the publication of a large
number of papers which discuss how that condensate could play a role in a
gauge-invariant formulation. In the present work we consider gluon propagation
in the presence of such a condensate which we assume to be present in the
vacuum. We show that the gluon propagator has no on-mass-shell pole and,
therefore, a gluon cannot propagate over extended distances. That is, the gluon
is a nonpropagating mode in the gluon condensate. In the present work we
discuss the properties of both the Euclidean-space and Minkowski-space gluon
propagator. In the case of the Euclidean-space propagator we can make contact
with the results of QCD lattice calculations of the propagator in the Landau
gauge. With an appropriate choice of normalization constants, we present a
unified representation of the gluon propagator that describes both the
Minkowski-space and Euclidean-space dynamics in which the A^2 condensate plays
an important role.


title:
Unitary chiral dynamics in $J/\Psi$ decays into $VPP$ and the role of
  the scalar mesons

abstract:
  We make a theoretical study of the $\J$ decays into $\omega\pi\pi$,
$\phi\pi\pi$, $\omega K \bar{K}$ and $\phi K\bar{K}$ using the techniques of
the chiral unitary approach stressing the important role of the scalar
resonances dynamically generated through the final state interaction of the two
pseudoscalar mesons. We also discuss the importance of new mechanisms with
intermediate exchange of vector and axial-vector mesons and the role played by
the OZI rule in the $\J\phi\pi\pi$ vertex, quantifying its effects. The results
nicely reproduce the experimental data for the invariant mass distributions in
all the channels considered.


title: The massive analytic invariant charge in QCD

abstract:
  The low energy behavior of a recently proposed model for the massive analytic
running coupling of QCD is studied. This running coupling has no unphysical
singularities, and in the absence of masses displays infrared enhancement. The
inclusion of the effects due to the mass of the lightest hadron is accomplished
by employing the dispersion relation for the Adler D function. The presence of
the nonvanishing pion mass tames the aforementioned enhancement, giving rise to
a finite value for the running coupling at the origin. In addition, the
effective charge acquires a "plateau-like" behavior in the low energy region of
the timelike domain. This plateau is found to be in agreement with a number of
phenomenological models for the strong running coupling. The developed
invariant charge is applied in the processing of experimental data on the
inclusive $\tau$ lepton decay. The effects due to the pion mass play an
essential role here as well, affecting the value of the QCD scale parameter
$\Lambda$ extracted from these data. Finally, the massive analytic running
coupling is compared with the effective coupling arising from the study of
Schwinger-Dyson equations, whose infrared finiteness is due to a dynamically
generated gluon mass. A qualitative picture of the possible impact of the
former coupling on the chiral symmetry breaking is presented.


title:
The B -> pi pi,pi K Puzzles in the Light of New Data: Implications for
  the Standard Model, New Physics and Rare Decays

abstract:
  Recently, we developed a strategy to analyse the B -> pi pi,pi K data. We
found that the B -> pi pi measurements can be accommodated in the Standard
Model (SM) through large non-factorizable effects. On the other hand, our
analysis of the ratios R_c and R_n of the CP-averaged branching ratios of the
charged and neutral B -> pi K modes, respectively, suggested new physics (NP)
in the electroweak penguin sector, which may have a powerful interplay with
rare decays. In this paper, we confront our strategy with recent experimental
developments, addressing also the direct CP violation in B_d -> pi^-+ K^+-,
which is now an established effect, the relation to its counterpart in B^+- ->
pi^0 K^+-, and the first results for the direct CP asymmetry of B_d -> pi^0
pi^0 that turn out to be in agreement with our prediction. We obtain hadronic B
-> pi pi,pi K parameters which are almost unchanged and arrive at an allowed
region for the unitarity triangle in perfect accordance with the SM. The ``B ->
pi K puzzle'' persists, and can still be explained through NP, as in our
previous analysis. In fact, the recently observed shifts in the experimental
values of R_c and R_n have been predicted in our framework on the basis of
constraints from rare decays. Conversely, we obtain a moderate deviation of the
ratio R of the CP-averaged B_d -> pi^-+ K^+- and B^+- -> pi^+- K rates from the
current experimental value. However, using the emerging signals for B^+- ->
K^+- K modes, this effect can be attributed to certain hadronic effects, which
have a minor impact on R_c and do not at all affect R_n. Our results for rare
decays remain unchanged.


title: Lepton Flavor Violation in a Long Baseline Experiment

abstract:
  We evaluate the size of a coupling for a lepton flavor violating interaction
with neutrinos (nLFV) in the minimal supersymmetric standard model with
right-handed neutrinos (MSSMRN). It is expected that the nLFV interactions are
detected in a long baseline neutrino oscillation experiment. We here deal with
$\mu^{-} \to e^{-} \bar{\nu}_{e} \nu_{\tau}$ in $\nu_{\mu} \to \nu_{\tau}$
channel at a neutrino factory. First, we show the numerical study on
feasibility to observe such interaction and point out that we can search for
them with some oscillation channels. Next, we make a numerical calculation for
the size of the nLFV coupling in the framework of the MSSMRN. A long baseline
experiment is sensitive not only to the lepton mixings in the standard model
but also to new physics effect.


title:
CPT violation in entangled B0-B0bar states and the demise of flavour
  tagging

abstract:
  We discuss the demise of flavour tagging due to the loss of the
particle-antiparticle identity of neutral B-mesons in the
Einstein-Podolsky-Rosen correlated states. Such a situation occurs in cases
where the CPT operator is ill-defined, as happens, for example, in quantum
gravity models with induced decoherence in the matter sector. The time
evolution of the perturbed B0-B0bar initial state, as produced in B-factories,
is sufficient to generate new two-body states. For flavour specific decays at
equal times, we discuss two definite tests of the two body entanglement: (i)
search for the would-be forbidden B0 B0 and B0bar B0bar states; (ii) deviations
from the indistinguishable probability between the permuted states B0bar B0 and
B0 B0bar.


title: Kaon Condensation in a Nambu--Jona-Lasinio (NJL) Model at High Density

abstract:
  We demonstrate a fully self-consistent microscopic realization of a
kaon-condensed colour-flavour locked state (CFLK0) within the context of a
mean-field NJL model at high density. The properties of this state are shown to
be consistent with the QCD low-energy effective theory once the proper gauge
neutrality conditions are satisfied, and a simple matching procedure is used to
compute the pion decay constant, which agrees with the perturbative QCD result.
The NJL model is used to compare the energies of the CFLK0 state to the parity
even CFL state, and to determine locations of the metal/insulator transition to
a phase with gapless fermionic excitations in the presence of a non-zero
hypercharge chemical potential and a non-zero strange quark mass. The
transition points are compared with results derived previously via effective
theories and with partially self-consistent NJL calculations. We find that the
qualitative physics does not change, but that the transitions are slightly
lower.


title:
Cosmogenic 11C production and sensitivity of organic scintillator
  detectors to pep and CNO neutrinos

abstract:
  Several possible background sources determine the detectability of pep and
CNO solar neutrinos in organic liquid scintillator detectors. Among such
sources, the cosmogenic 11C nuclide plays a central role. 11C is produced
underground in reactions induced by the residual cosmic muon flux. Experimental
data available for the effective cross section for 11C by muons indicate that
11C will be the dominant source of background for the observation of pep and
CNO neutrinos. 11C decays are expected to total a rate 2.5 (20) times higher
than the combined rate of pep and CNO neutrinos in Borexino (KamLAND) in the
energy window preferred for the pep measurement, between 0.8 and 1.3 MeV.
  This study examines the production mechanism of 11C by muon-induced showers
in organic liquid scintillators with a novel approach: for the first time, we
perform a detailed ab initio calculation of the production of a cosmogenic
nuclide, 11C, taking into consideration all relevant production channels.
Results of the calculation are compared with the effective cross sections
measured by target experiments in muon beams.
  This paper also discusses a technique for reduction of background from 11C in
organic liquid scintillator detectors, which allows to identify on a one-by-one
basis and remove from the data set a large fraction of 11C decays. The
background reduction technique hinges on an idea proposed by Martin Deutsch,
who suggested that a neutron must be ejected in every interaction producing a
11C nuclide from 12C. 11C events are tagged by a three-fold coincidence with
the parent muon track and the subsequent neutron capture on protons.


title: Psi'' decays to charmless final states

abstract:
  The importance of measuring the non-$D \bar D$ decays of the $\psi'' =
\psi(3770)$ resonance is discussed. These decays can shed light on a possible
discrepancy between the total and $D \bar D$ cross sections at the $\psi''$,
and on a proposed mechanism for enhancement of penguin amplitudes in $B$ meson
decays through charm--anticharm annihilation. Measurements (including the
$\psi''$ line shape) in states of definite G-parity and in inclusive charmless
final states such as $\eta' + X$ are found to be particularly important.


title: Massless Gauge Bosons other than the Photon

abstract:
  Gauge bosons associated with unbroken gauge symmetries, under which all
standard model fields are singlets, may interact with ordinary matter via
higher-dimensional operators. A complete set of dimension-six operators
involving a massless U(1) field, gamma-prime, and standard model fields is
presented. The mu to e gamma-prime decay, primordial nucleosynthesis, star
cooling and other phenomena set lower limits on the scale of chirality-flip
operators in the 1 - 15 TeV range, if the operators have coefficients given by
the corresponding Yukawa couplings. Simple renormalizable models induce
gamma-prime interactions with leptons or quarks at two loops, and may provide a
cold dark matter candidate.


title: The Spin Structure of the Proton

abstract:
  This article reviews our present understanding of the QCD spin structure of
the proton. We first outline the proton spin puzzle and its possible resolution
in QCD. We then review the present and next generation of experiments to
resolve the proton's spin-flavour structure, explaining the theoretical issues
involved, the present status of experimental investigation, and the open
questions and challenges for future investigation.


title: Total Cross-sections and Bloch-Nordsieck Gluon Resummation

abstract:
  The physics underlying the fall and eventual rise in various total
cross-sections at high energies has been investigated over a decade using a
model based on the Bloch-Nordsieck resummation in QCD. Here a brief review of
our latest results is presented and comparison made with experimental data on
$pp$, $\gamma proton$ and $\gamma \gamma$ total cross-sections.


title: A sum rule for elastic scattering

abstract:
  A sum rule is derived for elastic scattering of hadrons at high energies
which is in good agreement with experimental data on $p\bar{p}$ available upto
the maximum energy $\sqrt{s} = 2 TeV$. Physically, our sum rule reflects the
way unitarity correlates and limits how large the elastic amplitude can be as a
function of energy to how fast it decreases as a function of the momentum
transfer. The universality of our result is justified through our earlier
result on equipartition of quark and glue momenta obtained from the virial
theorem for massless quarks and the Wilson conjecture


title:
Towards pair production near threshold with unstable particle effective
  theory

abstract:
  We illustrate the use of effective theory techniques to describe processes
involving unstable particles close to resonance. First, we present the main
ideas in the context of a scalar resonance in an Abelian gauge-Yukawa model. We
then outline the necessary modifications to describe W-pair production close to
threshold in electron-positron collisions.


title: Neutrinos: Key to New Physics

abstract:
  The Seesaw mechanism predicted tiny neutrino masses by postulating a new
large scale in particle physics, using new theoretical ideas prompted by the
Standard Model. It adds credence to a theoretical vista that is a quarter
century old, and fits with the most endearing speculations of ultimate
unification. By relating the measurement of static neutrino properties to
near-Planck physics, it may even prove key to solving the riddles of flavor.


title: Seesaw and the Riddle of Mass

abstract:
  The prediction of small neutrino masses through the Seesaw Mechanism and
their subsequent measurement suggests that the natural cut-off of the Standard
Model is very high indeed. The recent neutrino data must be interpreted as a
reflection of physics at very high energy. We examine their implications in
terms of ideas of Grand Unification and Supersymmetry, and as possible hints
for a unified theory of flavor.


title: Neutrino Physics from New Measurements

abstract:
  Emergence of neutrino physics is fueled by the recent growth in quality and
quantity of experimental data, yet, there are still open questions. How much
can the determination of mixing parameters be improved? Can we improve bounds
on theta_13 before experiments designed specifically for this parameter start?
How well can we determine or limit sterile fraction of neutrino flux from sun
and sterile mixing angle? We examine the impact of outcome from new
measurements in the context of providing answers to these questions


title: Electroweak phase transition in the MSSM with four generations

abstract:
  By assuming the existence of the sequential fourth generation to the minimal
supersymmetric standard model (MSSM), we study the possibility of a strongly
first-order electroweak phase transition. We find that there is a parameter
region of the MSSM where the electroweak phase transition is strongly first
order. In that parameter region, the mass of the lighter scalar Higgs boson is
calculated to be above the experimental lower bound, and the scalar quarks of
the third and the fourth generations are heavier than the corresponding quarks.


title: Simultaneous Solutions of the Strong CP and Mu Problems

abstract:
  The \mu parameter of the supersymmetric standard model is replaced by \lambda
S, where S is a singlet chiral superfield, introducing a Peccei--Quinn symmetry
into the theory. Dynamics at the electroweak scale naturally solves both the
strong CP and \mu problems as long as \lambda is of order \sqrt{M_Z /M_pl} or
smaller, and yet this theory has the same number of relevant parameters as the
supersymmetric standard model. The theory will be tested at colliders: the \mu
parameter is predicted and there are long-lived superpartners that decay to
gravitinos or axinos at separated vertices. To avoid too much saxion cold dark
matter, a large amount of entropy must be produced after the electroweak phase
transition. If this is accomplished by decays of a massive particle, the reheat
temperature should be no more than a GeV, strongly constraining baryogenesis.
Cold dark matter may be composed of both axions, probed by direct detection,
and saxions, probed by a soft X-ray background arising from decays to \gamma
\gamma. There are two known possibilities for avoiding problematic axion domain
walls: the introduction of new colored fermions or the assumption that the
Peccei--Quinn symmetry was already broken during inflation. In the first case,
in our theory the colored particles are expected to be at the weak scale, while
in the second case it implies a good chance of discovering isocurvature
perturbations in the CMB radiation and a relatively low Hubble parameter during
inflation.


title: Nucleon Structure Functions and Nuclear DIS

abstract:
  The nucleon structure study in nuclear deep inelastic scattering is
considered. It is shown that nuclear data provide a new source of information
about dynamics of parton distributions in the nucleon. An example of the
neutron structure function extraction from the deuteron and proton data is
considered. The limit $x\to 1$ of the neutron to proton structure functions
ratio is studied. A link between the deep inelastic scattering off the nucleon
at high $x$ and elastic scattering off nuclei in high $Q^2$ region is
discussed.


title: Stopping power of hot QCD plasma

abstract:
  The partonic energy loss has been calculated taking both the hard and soft
contributions for all the $2 \to 2$ processes, revealing the importance of the
individual channels. Cancellation of the intermediate separation scale has been
exhibited. Subtleties related to the identical final state partons have
properly been taken into account. The estimated collisional loss is compared
with its radiative counter part. We show that there exists a critical energy
($E_c$) below which the collisional loss is more than its radiative
counterpart. In addition, we present closed form formulas for both the
collision probabilities and the stopping power ($dE/dx$)


title: Pentaquark with diquark correlations in a quark model

abstract:
  We have investigated uudd\sbar pentaquarks by employing quark models with the
meson exchange and the effective gluon exchange as qq and q\qbar interactions.
The system for five quarks is dynamically solved; two quarks are allowed to
have a diquark-like qq correlation. It is found that the lowest mass of the
pentaquark is about 1947 -- 2144 MeV. There are parameter sets where the mass
of the lowest positive-parity state become lower than that of the
negative-parity states. Which parity corresponds to the observed peak is still
an open question. Relative distance of two quarks with the attractive
interaction is found to be by about 1.2 -- 1.3 times closer than that of the
repulsive one. The diquark-like quark correlation seems to play an important
role in the pentaquark systems.


title:
Neutrino Masses Without Seesaw Mechanism in a SUSY SU(5) Model With
  Additional $\bar{5}'_L+5'_L$

abstract:
  A radiatively-induced neutrino mass matrix with a simple structure is
proposed on the basis of an SU(5) SUSY GUT model with R-parity violation. The
model has matter fields $\bar{5}'_{L}+5'_{L}$ in addition to the ordinary
matter fields $\bar{5}_{L}+10_{L}$ and Higgs fields $H_u+\bar{H}_d$. The
R-parity violating terms are given by $\bar{5}_{L} \bar{5}_{L} 10_{L}$, while
the Yukawa interactions are given by $\bar{H}_d \bar{5}'_{L} 10_{L}$. Since the
matter fields $\bar{5}'_L$ and $\bar{5}_L$ are different from each other at the
unification scale, the R-parity violation effects at a low energy scale appear
only through the $\bar{5}'_L \leftrightarrow \bar{5}_{L}$ mixings. In order to
make this R-parity violation effect harmless for proton decay, a discrete
symmetry Z_3 and a triplet-doublet splitting mechanism analogous to the Higgs
sector are assumed.


title:
Next-to-Leading Order QCD Corrections to the Drell-Yan Cross Section in
  Models of TeV-Scale Gravity

abstract:
  The first results on next-to-leading order QCD corrections to
graviton-induced processes in hadron collisions in models of TeV-scale gravity
are presented focusing on the case of dilepton pair production in \bar p p and
pp collisions. Distributions in the invariant mass Q, the longitudinal fraction
x_F, the rapidity Y and the forward-backward asymmetry of the lepton pair are
studied. The quantitative impact of the QCD corrections for searches of extra
dimensions at hadron colliders is investigated. It turns out that at the LHC
(\sqrt{S}=14 TeV) the K-factor is rather large (K=1.6) for large invariant mass
Q of the lepton pair, indicating the importance of accounting for these QCD
corrections in the experimental search for TeV-scale gravity. At the Tevatron,
the K-factor does not substantially deviate from the Standard Model value.
However, its inclusion is necessitated to make the cross-section stable with
respect to scale variations.


title:
Longitudinal $\bar \Lambda_0$ polarization in heavy ion collisions as a
  probe for QGP formation

abstract:
  We present an analysis of the longitudinal $\bar \Lambda_0$ polarization in
ultra-relativistic heavy-ion collisions. The polarization of $\bar \Lambda_0$'s
coming from the decay chain $\bar{\Xi}\to \bar{\Lambda}_0+\pi$ exhibits a very
well differentiated behavior depending on the production region of the
primordial $\bar \Xi$'s. This effect reflects the different values of the
$N_{\bar \Xi}/N_{\bar \Lambda_0}$ ratio in the QGP region, where
nucleon-nucleon interactions take place in a hot and dense environment, and the
peripherical region, in which ordinary nucleon-nucleon interactions occur. An
increase in the longitudinal $\bar \Lambda_0$ polarization signals a
strangeness enhancement which is thought as a property of the QGP phase.


title: The saga of bottom production in proton-antiproton collisions

abstract:
  I review here the history of bottom quark cross section measurements and
theoretical predictions. Starting form the early days of UA1, and going through
the sequence of the large excesses reported during run 0 and I at the Tevatron
by CDF and D0, I summarize how both data and theory have evolved in time,
thanks to improved experimental techniques, more data, and improved control
over the main ingredients of the theoretical calculations. I conclude with the
discussion of the preliminary data from run II, which appear to finally give a
satisfactory picture of the data vs theory comparison.


title: Brane inflation with dark reheating

abstract:
  In brane world scenarios inflationary vacuum energy may escape into the
higher dimensional bulk leaving behind a dark radiation effect on the brane.
The paper analyses the damping of an inflaton by massless bulk scalar radiation
and the production of dark radiation in a Randall-Sundrum type of model.


title: Exploring Higher Dimensional Black Holes at the Large Hadron Collider

abstract:
  In some extra dimension theories with a TeV fundamental Planck scale, black
holes could be produced in future collider experiments. Although cross sections
can be large, measuring the model parameters is difficult due to the many
theoretical uncertainties. Here we discuss those uncertainties and then we
study the experimental characteristics of black hole production and decay at a
typical detector using the ATLAS detector as a guide. We present a new
technique for measuring the temperature of black holes that applies to many
models. We apply this technique to a test case with four extra dimensions and,
using an estimate of the parton-level production cross section error of 20%,
determine the Planck mass to 15% and the number of extra dimensions to +-0.75.


title: Neutrino helicity asymmetries in leptogenesis

abstract:
  It is pointed out that the heavy singlet neutrinos characteristic of
leptogenesis develop asymmetries in the abundances of the two helicity states
as a result of the same mechanism that generates asymmetries in the standard
lepton sector. Neutrinos and standard leptons interchange asymmetries in
collisions with each other. It is shown that an appropriate quantum number,
B-L', combining baryon, lepton and neutrino asymmetries, is not violated as
fast as the standard B-L. This suppresses the washout effects relevant for the
derivation of the final baryon asymmetry. One presents detailed calculations
for the period of neutrino thermal production in the framework of the singlet
seesaw mechanism.


title: Scale of Mass Generation for Majorana Neutrinos

abstract:
  Scales of mass generation for Majorana neutrinos (as well as quarks and
leptons) can be probed from high energy 2 --> n inelastic scattering involving
a multiple longitudinal gauge boson final state. We demonstrate that the
unitarity of 2 --> n scattering puts the strongest new upper limit on the scale
of fermion mass generation, independent of the electroweak symmetry breaking
scale $v=(\sqrt{2}G_F)^{-1/2}$. Strikingly, for Majorana neutrinos (quarks and
leptons), we find that the strongest 2 --> n limits fall in a narrow range,
136-170 TeV (3-107 TeV) with n=20-24 (n=2-12), depending on the observed
fermion masses. Physical implications are discussed.


title: Some Remarks on Exotic Resonances

abstract:
  Using large $N_c$ counting rule, it is argued that tetra-quark resonances do
not exist. Also it is pointed out that there exists the violation of exchange
degeneracy in the exotic $KN$ scattering channel. It implies either the failure
of resonance saturation assumption or it suggests the existence of exotic
baryon resonances in such a channel.


title: Upsilon Transverse Momentum at Hadron Colliders

abstract:
  We predict the shape of the transverse momentum p_T spectrum of Upsilon
production. The distribution at low p_T is dominated by the region of small
impact parameter b and may be computed reliably in perturbation theory. We
resum to all orders in the strong coupling alpha_s the process-independent
large logarithmic contributions that arise from initial-state gluon showers in
the small p_T (< M_Upsilon) region. The cross section at large p_T is
represented by the alpha_s^3 lowest-order non-vanishing perturbative
contribution.


title: Impact of Four-Quark Shape Functions on Inclusive B Decay Spectra

abstract:
  It has recently been pointed out that a new class of subleading shape
functions involving B-meson matrix elements of non-local four-quark operators
contributes at order Lambda_{QCD}/m_b to B->X_u+l+nu decay distributions in the
endpoint region. The corresponding functions f_u(omega) and f_v(omega) are
estimated using the vacuum-insertion approximation. A numerical analysis of
various B->X_u+l+nu decay spectra suggests that these power corrections are
very small, below present theoretical uncertainties due to other subleading
shape-function contributions.


title:
Novel QCD Aspects of Hard Diffraction, Antishadowing, and Single-Spin
  Asymmetries

abstract:
  It is usually assumed -- following the parton model -- that the leading-twist
structure functions measured in deep inelastic lepton-proton scattering are
simply the probability distributions for finding quarks and gluons in the
target nucleon. In fact, gluon exchange between the outgoing quarks and the
target spectators effects the leading-twist structure functions in a profound
way, leading to diffractive leptoproduction processes, shadowing and
antishadowing of nuclear structure functions, and target spin asymmetries,
physics not incorporated in the light-front wavefunctions of the target
computed in isolation. In particular, final-state interactions from gluon
exchange lead to single-spin asymmetries in semi-inclusive deep inelastic
lepton-proton scattering which are not power-law suppressed in the Bjorken
limit. The shadowing and antishadowing of nuclear structure functions in the
Gribov-Glauber picture is due respectively to the destructive and constructive
interference of amplitudes arising from the multiple-scattering of quarks in
the nucleus. The effective quark-nucleon scattering amplitude includes Pomeron
and Odderon contributions from multi-gluon exchange as well as Reggeon
quark-exchange contributions. Part of the anomalous NuTeV result for
$\sin^2\theta_W$ could be due to the non-universality of nuclear antishadowing
for charged and neutral currents. Detailed measurements of the nuclear
dependence of individual quark structure functions are thus needed to establish
the distinctive phenomenology of shadowing and antishadowing and to make the
NuTeV results definitive. I also discuss diffraction dissociation as a tool for
resolving hadron substructure Fock state by Fock state and for producing
leading heavy quark systems.


title: Novel Aspects of QCD in Leptoproduction

abstract:
  I review several topics in electroproduction which test fundamental aspects
of QCD. These include the role of final-state interactions in producing
diffractive leptoproduction processes, the shadowing of nuclear structure
functions, and target-spin asymmetries. The antishadowing of nuclear structure
functions is shown to be quark-flavor specific, suggesting that some part of
the anomalous NuTeV result for $\sin^2\theta_W$ could be due to the
non-universality of nuclear antishadowing for charged and neutral currents. I
also discuss the physics of the heavy-quark sea, hidden color in nuclear
wavefunctions, and evidence for color transparency for nuclear processes. The
AdS/CFT correspondence connecting superstring theory to superconformal gauge
theory has important implications for hadron phenomenology in the conformal
limit, including an all-orders demonstration of counting rules for hard
exclusive processes, as well as determining essential aspects of hadronic
light-front wavefunctions.


title: Testing the see-saw mechanism at collider energies

abstract:
  We propose a low energy extension of the Standard Model consisting of an
additional gauged $U(1)_{B-L}$ plus three right-handed neutrinos. The lightest
right-handed neutrinos have TeV scale masses and may be produced at colliders
via their couplings to the $Z_{B-L}$ gauge boson whose mass and gauge coupling
is constrained by the out-of-equilibrium condition leading to upper bounds on
the right-handed neutrino and $Z_{B-L}$ production cross-sections at colliders.
We propose a brane-world scenario which motivates such TeV mass right-handed
neutrinos. Our analysis opens up the possibility that the mechanism responsible
for neutrino mass is testable at colliders such as the LHC or VLHC.


title: About the sign of $\Delta m_{12}^2$

abstract:
  The present status of the problem of identifying the sign of $\Delta
m_{12}^2$ is discussed in view of the development of new methods of detection
of solar neutrinos.


title: Recent Developments in the Bethe-Salpeter Description of Light Mesons

abstract:
  Results for the light meson mass spectrum from a Bethe-Salpeter approach are
presented. The results obtained in the standard framework are Poincar\'{e}
covariant and compare favourably with lattice results. Using a more
sophisticated scheme, the pseudoscalar, vector and $1^{++}$ ($a_1/f_1$)
axialvector charge eigenstate masses are unaltered whereas the $1^{+-}$
($b_1/h_1$) axialvector meson mass is raised.


title: Power corrections in charmless B decays

abstract:
  Power corrections seem to play an important role in charmless B decays as
indicated by recent analysis using QCD Factorization. In this talk, I would
like to report on a recent work on power corrections in charmless B decays. By
using the ratio of the branching fraction of $B^+ \to \pi^+ K^{\ast 0}$ to that
of $B^0 \to \pi^- \rho^+$, for which the theoretical uncertainties are greatly
reduced, it is shown in a transparent manner that power corrections in
charmless B decays are probably large and that the $B^0 \to K^- \rho^+$ decay
could be explained with the annihilation term included. For ratios of direct CP
asymmetries, QCD Factorisation with the annihilation terms included would
predict the direct CP asymmetry of $B \to \pi^+ \pi^-$ to be about 3 times
larger than that of $B \to \pi^\pm K^\mp$, with opposite sign. In particular,
the large measured value for $B \to \pi^\pm K^\mp $ CP asymmetry implies
naturally a corresponding large $B \to \pi^+ \pi^-$ CP asymmetry as observed by
Belle. Experimentally any significant deviation from this prediction or
possibly the importance of long-distance rescattering effects.


title: 0^+ and 1^+ States of B and B_s Mesons

abstract:
  Predicted masses of J^P=0^+ and 1^+ states of D_{sJ} and D by a potential
model proposed some time ago by two of us (T.M. and T.M.), in which the
Hamiltonian and wave functions are expanded in 1/m_Q with m_Q heavy quark mass
respecting heavy quark symmetry, have recently been confirmed by BaBar and
Belle experiments within one percent accuracy.
  In this Letter, decay modes of 0^+ and 1^+ states of B and B_s mesons are
discussed using the predicted masses of this model.


title:
Experimental implications for a linear collider of SUSY dark matter
  scenario

abstract:
  This talk presents the detection issues for the lightest slepton
\tilde{\tau}_1 at a future e+e- TeV collider given the dark matter constraints
set on the SUSY mass spectrum by the WMAP results. Two methods for measuring
its mass m_{\tilde{\tau}_1} and the resulting precision on the dark matter
density are briefly discussed in the SUSY mSUGRA scenario with R-parity
conservation when the mass difference between m_{\tilde{\tau}_1} and that of
the lightest neutralino is small (a few GeV). The analysis is performed with
TESLA parameters in both head-on and crossing angle modes.


title:
Dynamically Generated Resonances in the Chiral Unitary Approach to Meson
  Baryon Interaction

abstract:
  In this talk we report on the use of a chiral unitary approach for the
interaction of the octets of meson and baryon and the octet of mesons with the
decuplet of baryons. Two octets of $J^{\pi}=1/2^-$ baryon states and a singlet
are generated dynamically in the first case, resulting in the case of
strangeness $S=-1$ in two poles of the scattering matrix close to the nominal
$\Lambda(1405)$ resonance. In the second case many resonances are also
generated, among them an exotic baryon with S=1 corresponding to a $\Delta K$
resonance. We make suggestions of experiments which could show evidence for the
existence of these states.


title: Color superconductivity in high density QCD

abstract: In this contributed paper the gapless phases of QCD are discussed.