title: A low energy neutrino factory for large $\theta_{13}$

abstract:
  If the value of $\theta_{13}$ is within the reach of the upcoming generation
of long-baseline experiments, T2K and NO$\nu$A, we show that a low-energy
neutrino factory, with peak energy in the few GeV range, would provide a
sensitive tool to explore CP-violation and the neutrino mass hierarchy. We
consider baselines with typical length 1000--1500 km. The unique performance of
the low energy neutrino factory is due to the rich neutrino oscillation pattern
at energies between 1 and 4 GeV at baselines $\mathcal{O}(1000)$ km. We perform
both a semi-analytical study of the sensitivities and a numerical analysis to
explore how well this setup can measure $\theta_{13}$, CP-violation, and
determine the type of mass hierarchy and the $\theta_{23}$ quadrant.
  A low energy neutrino factory provides a powerful tool to resolve ambiguities
and make precise parameter determinations, for both large and fairly small
values of the mixing parameter $\theta_{13}$.


title:
Aspects of the Screening Length and Drag Force in Two Alternative
  Gravity Duals of the Quark-gluon Plasma

abstract:
  We compute the screening length of mesons with different angular momentum $J$
from two gravity dual theories. Both the asymptotically $AdS_{5}$ and
Sakai-Sugimoto metrics are considered in the calculations. Using the dual
description of the quark as a classical string ending on the probe brane, we
obtain the interacting potential between the heavy quark and antiquark after
rotating the background metric. The result shows that the screening length of
mesons with different $J$ is well fit to $a_{J}/T$. The constant $a_{J}$ is
determined for $J=0,1,2$ by taking advantage of numerical techniques. Finally,
we calculate the drag force and relaxation times from the Sakai-Sugimoto metric
and compare with the ones obtained in the $AdS_{5}$. The application of our
result to charmonium and bottomonium at RHIC and LHC is briefly discussed.


title: Theory of the tau lepton anomalous magnetic moment

abstract:
  This article reviews and updates the Standard Model prediction of the tau
lepton g-2. Updated QED and electroweak contributions are presented, together
with new values of the leading-order hadronic term, based on the recent low
energy e+ e- data from BaBar, CMD-2, KLOE and SND, and of the hadronic
light-by-light contribution. The total prediction is confronted to the
available experimental bounds on the tau lepton anomaly, and prospects for its
future measurements are briefly discussed.


title: SM Precision Constraints at the LHC/ILC

abstract:
  The prospects for electroweak precision physics at the LHC and the ILC are
reviewed. This includes projections for measurements of the effective Z pole
weak mixing angle, sin^2 theta_W (eff.), as well as top quark, W boson, and
Higgs scalar properties. The upcoming years may also see very precise
determinations of sin^2 theta_W (eff.) from lower energies.


title: Unconventional Color Superconductor

abstract:
  Superfluidity or superconductivity with mismatched Fermi momenta appears in
many systems such as charge neutral dense quark matter, asymmetric nuclear
matter, and in imbalanced cold atomic gases. The mismatch plays the role of
breaking the Cooper pairing, and the pair-breaking state cannot be properly
described in the framework of standard BCS theory. I give a brief review on
recent theoretical development in understanding unconventional color
superconductivity, including gapless color superconductor, the chromomagnetic
instabilities and the Higgs instability in the gapless phase. I also introduce
a possible new framework for describing unconventional color superconductor.


title:
Decay constants and radiative decays of heavy mesons in light-front
  quark model

abstract:
  We investigate the magnetic dipole decays $V\to P\gamma$ of various
heavy-flavored mesons such as $(D,D^*,D_s,D^{*}_s,\eta_c, J/\psi)$ and
$(B,B^*,B_s,B^*_s,\eta_b,\Upsilon)$ using the light-front quark model
constrained by the variational principle for the QCD-motivated effective
Hamiltonian. The momentum dependent form factors $F_{VP}(q^2)$ for $V\to
P\gamma^*$ decays are obtained in the $q^+=0$ frame and then analytically
continued to the timelike region by changing ${\bf q}_\perp$ to $i{\bf
q}_\perp$ in the form factors. The coupling constant $g_{VP\gamma}$ for real
photon case is then obtained in the limit as $q^2\to 0$, i.e.
$g_{VP\gamma}=F_{VP}(q^2=0)$. The weak decay constants of heavy pseudoscalar
and vector mesons are also calculated. Our numerical results for the decay
constants and radiative decay widths for the heavy-flavored mesons are overall
in good agreement with the available experimental data as well as other
theoretical model calculations.


title: On the Application of Gluon to Heavy Quarkonium Fragmentation Functions

abstract:
  We analyze the uncertainties induced by different definitions of the momentum
fraction $z$ in the application of gluon to heavy quarkonium fragmentation
function. We numerically calculate the initial $g \to J / \psi$ fragmentation
functions by using the non-covariant definitions of $z$ with finite gluon
momentum and find that these fragmentation functions have strong dependence on
the gluon momentum $\vec{k}$. As $| \vec{k} | \to \infty$, these fragmentation
functions approach to the fragmentation function in the light-cone definition.
Our numerical results show that large uncertainties remains while the
non-covariant definitions of $z$ are employed in the application of the
fragmentation functions. We present for the first time the polarized gluon to
$J/\psi$ fragmentation functions, which are fitted by the scheme exploited in
this work.


title: Heavy-to-light form factors on the light cone

abstract:
  The light cone method provides a convenient non-perturbative tool to study
the heavy-to-light form factors. We construct a light cone quark model
utilizing the soft collinear effective theory. In the leading order of
effective theory, the ten $B$ to light physical form factors are reduced to
three universal form factors which can be calculated as overlaps of hadron
light front wave functions in the light cone quark model. The numerical results
show that the leading contribution is close to the results from other
approaches. The $q^2$ dependence of the heavy-to-light form factors are also
presented.


title:
Non-thermal right-handed sneutrino dark matter and the Omega_DM/Omega_b
  problem

abstract:
  We argue that the superpartner of the Dirac right-handed neutrino is a prime
candidate for dark matter created from a 'mattergenesis' mechanism. We show
that due to the smallness of the Yukawa couplings, a right-handed sneutrino
density created in the early Universe would not be erased by annihilations,
which remain out of thermal equilibrium. It would also not be drowned by a
later, additional production of right-handed sneutrinos, as the relic density
of the non-thermal right-handed sneutrinos is found to be generally negligible
compared to the observed dark matter density. Mild constraints on sneutrino
masses and trilinear SUSY-breaking couplings are obtained. Possible
mattergenesis scenarios are also mentioned


title: Partially Quenched and Three Flavour ChPT at Two Loops

abstract:
  A summary of recent progress in Chiral Perturbation Theory (ChPT) at the
two-loop level is given. A short introduction to ChPT is included, along with
an explanation of the usefulness of developing ChPT for partially quenched QCD.
Further, our recent work in partially quenched ChPT is reviewed, and a few
comments are given on older work in mesonic ChPT at the two-loop level. In
particular, we quote the present best values for the low-energy constants of
the $\mathcal{O}(p^4)$ chiral Lagrangian.


title: From QCD Lagrangian to Monte Carlo simulation

abstract:
  I discuss old and recent aspects of QCD jet-emission and describe how hard
QCD results are used to construct Monte Carlo programs for generating hadron
emission in hard collisions. I focus on the program HERWIG at LHC.


title: The pp -> K^+Sigma^+n cross section from missing mass spectra

abstract:
  We utilize existing inclusive data on K^+ meson momentum spectra of the
reaction pp -> K^+X at T_p = 2.3 - 2.85 GeV to deduce total cross sections for
pp -> K^+\Sigma^+n. The method used to extract those cross sections is
explained and discussed in detail. Our result for T_p = 2.85 GeV is consistent
with the data point from a direct measurement at the same beam energy. The
cross section obtained for T_p = 2.3 GeV is with 13.7\pm2.3 \mu b considerably
smaller than the value found in a recent experiment by the COSY-11
Collaboration at a somewhat lower beam energy, indicating that the pp ->
K^+\Sigma^+n reaction cross section could exhibit a rather unusual energy
dependence.


title: Observable Electron EDM and Leptogenesis

abstract:
  In the context of the minimal supersymmetric seesaw model, the CP-violating
neutrino Yukawa couplings might induce an electron EDM. The same interactions
may also be responsible for the generation of the observed baryon asymmetry of
the Universe via leptogenesis. We identify in a model-independent way those
patterns within the seesaw models which predict an electron EDM at a level
probed by planned laboratory experiments and show that negative searches on
\tau-> e \gamma decay may provide the strongest upper bound on the electron
EDM. We also conclude that a possible future detection of the electron EDM is
incompatible with thermal leptogenesis, even when flavour effects are accounted
for.


title: Phenomenological viability of neutralino dark matter in the NMSSM

abstract:
  The viability of the lightest neutralino as a dark matter candidate in the
Next-to-Minimal Supersymmetric Standard Model is analysed. We carry out a
thorough analysis of the parameter space, taking into account accelerator
constraints as well as bounds on low-energy observables, such as the muon
anomalous magnetic moment and rare $K$ and $B$ meson decays. The neutralino
relic density is also evaluated and consistency with present bounds imposed.
Finally, the neutralino direct detection cross section is calculated in the
allowed regions of the parameter space and compared to the sensitivities of
present and projected dark matter experiments. Regions of the parameter space
are found where experimental constraints are fulfilled, the lightest neutralino
has the correct relic abundance and its detection cross section is within the
reach of dark matter detectors. This is possible in the presence of very light
singlet-like Higgses and when the neutralino is either light enough so that
some annihilation channels are kinematically forbidden, or has a large singlino
component.


title: Two-Photon Physics in Hadronic Processes

abstract:
  Two-photon exchange contributions to elastic electron-scattering are
reviewed. The apparent discrepancy in the extraction of elastic nucleon form
factors between unpolarized Rosenbluth and polarization transfer experiments is
discussed, as well as the understanding of this puzzle in terms of two-photon
exchange corrections. Calculations of such corrections both within partonic and
hadronic frameworks are reviewed. In view of recent spin-dependent electron
scattering data, the relation of the two-photon exchange process to the
hyperfine splitting in hydrogen is critically examined. The imaginary part of
the two-photon exchange amplitude as can be accessed from the beam normal spin
asymmetry in elastic electron-nucleon scattering is reviewed. Further
extensions and open issues in this field are outlined.


title:
Flavour Dynamics & \cp Violation in the Standard Model: A Crucial Past
  -- and an Essential Future

abstract:
  Our knowledge of flavour dynamics has undergone a `quantum jump' since just
before the turn of the millenium: direct \cp violation has been firmly {\em
established} in $K_L \to \pi \pi$ decays in 1999; the first \cp asymmetry
outside $K_L$ decays has been discovered in 2001 in $B_d \to \psi K_S$,
followed by $B_d \to \pi^+\pi^-$, $\eta^{\prime}K_S$ and $B \to
K^{\pm}\pi^{\mp}$, the last one establishing direct \cp violation also in the
beauty sector.Furthermore CKM dynamics allows a description of \cp insensitive
and sensitive $B$, $K$ and $D$ transitions that is impressively consistent also
on the quantitative level. Theories of flavour dynamics that could serve as
{\em alternatives} to CKM have been ruled out. Yet these novel successes of the
Standard Model (SM) do not invalidate any of the theoretical arguments for the
incompleteness of the SM. In addition we have also more direct evidence for New
Physics, namely neutrino oscillations, the observed baryon number of the
Universe, dark matter and dark energy. While the New Physics anticipated at the
TeV scale is not likely to shed any light on the SM's mysteries of flavour,
detailed and comprehensive studies of heavy flavour transitions will be
essential in diagnosing salient features of that New Physics. Strategic
principles for such studies will be outlined.


title: Mesons of the rho-family in the P-wave of pion-pion scattering

abstract:
  In the approach, based on analyticity and unitarity and assuming an influence
of coupled channels, experimental data on the isovector P-wave of pion-pion
scattering have been analyzed to study rho-like mesons below 1.9 GeV.


title: $\Lambda NN$ and $\Sigma NN$ systems at threshold

abstract:
  We calculate the hypertriton binding energy and the $\Lambda d$ and $\Sigma
d$ scattering lengths using baryon-baryon interactions obtained from a chiral
constituent quark model. We study consistently the $\Lambda NN$ and $\Sigma NN$
systems analyzing the effect of the $\Sigma \leftrightarrow \Lambda$
conversion. Our interactions correctly predict the hypertriton binding energy.
The $(I,J)=(0,3/2)$ $\Lambda NN$ channel is also attractive and it might have a
bound state. From the condition of nonexistence of a (0,3/2) $\Lambda NN$ bound
state, an upper limit for the spin-triplet $\Lambda N$ scattering length is
obtained. We also present results for the elastic and inelastic $\Sigma N$ and
$\Lambda N$ cross sections. The consistent description of the $\Sigma N$
scattering cross sections imposes a lower limit for the corresponding
spin-triplet scattering lengths. In the $\Sigma NN$ system the only attractive
channels are $(I,J)=(1,1/2)$ and $(0,1/2)$, the $(1,1/2)$ state being the most
attractive one.


title: Liouville field theory for gluon saturation in QCD at high energy

abstract:
  We argue that quantum Liouville field theory supplemented with a suitable
source term is the effective theory which describes the short-range
correlations of the gluon saturation momentum in the two-dimensional
impact-parameter space, at sufficiently high energy and for a large number of
colors. This is motivated by recent developments concerning the stochastic
aspects of the high-energy evolution in QCD, together with the manifest scale
invariance of the respective evolution equations and general considerations on
the uncertainty principle. The source term explicitly breaks down the conformal
symmetry of the (pure) Liouville action, thus introducing a physical mass scale
in the problem which is identified with the average saturation momentum. We
construct this source term for the case of a homogeneous distribution and show
that this leads to an interesting theory: the relevant correlation functions
are ultraviolet finite (and not just renormalizable) when computed in
perturbation theory, due to mutual cancellations of the tadpole divergences.
Possible generalizations to inhomogeneous source terms are briefly discussed.


title:
Single-Transverse Spin Asymmetry in Dijet Correlations at Hadron
  Colliders

abstract:
  We present a phenomenological study of the single-transverse spin asymmetry
in azimuthal correlations of two jets produced nearly "back-to-back" in pp
collisions at RHIC. We properly take into account the initial- and final-state
interactions of partons that can generate this asymmetry in QCD
hard-scattering. Using distribution functions fitted to the existing
single-spin data, we make predictions for various weighted single-spin
asymmetries in dijet correlations that are now readily testable at RHIC.


title: TeV physics and the Planck scale

abstract:
  Supersymmetry is one of the best motivated possibilities for new physics at
the TeV scale. However, both concrete string constructions and phenomenological
considerations suggest the possibility that the physics at the TeV scale could
be more complicated than the Minimal Supersymmetric Standard Model (MSSM),
e.g., due to extended gauge symmetries, new vector-like supermultiplets with
non-standard SU(2)xU(1) assignments, and extended Higgs sectors. We briefly
comment on some of these possibilities, and discuss in more detail the class of
extensions of the MSSM involving an additional standard model singlet field.
The latter provides a solution to the $\mu$ problem, and allows significant
modifications of the MSSM in the Higgs and neutralino sectors, with important
consequences for collider physics, cold dark matter, and electroweak
baryogenesis.


title: Landscape of Little Hierarchy

abstract:
  We investigate the little hierarchy between Z boson mass and the SUSY
breaking scale in the context of landscape of electroweak symmetry breaking
vacua. We consider the radiative symmetry breaking and found that the scale
where the electroweak symmetry breaking conditions are satisfied and the
average stop mass scale is preferred to be very close to each other in spite of
the fact that their origins depend on different parameters of the model. If the
electroweak symmetry breaking scale is fixed at about 1 TeV by the
supersymmetry model parameters then the little hierarchy seems to be preferred
among the electroweak symmetry breaking vacua. We characterize the little
hierarchy by a probability function and the mSUGRA model is used as an example
to show the 90% and 95% probability contours in the experimentally allowed
region. We also investigate the size of the Higgsino mass by considering the
distribution of electroweak symmetry breaking scale.


title:
Gluon-gluon contributions to the production of continuum diphoton pairs
  at hadron colliders

abstract:
  We compute the contributions to continuum photon pair production at hadron
colliders from processes initiated by gluon-gluon and gluon-quark scattering
into two photons through a four-leg virtual quark loop. Complete two-loop cross
sections in perturbative quantum chromodynamics are combined with contributions
from soft parton radiation resummed to all orders in the strong coupling
strength. The structure of the resummed cross section is examined in detail,
including a new type of unintegrated parton distribution function affecting
azimuthal angle distributions of photons in the pair's rest frame. As a result
of this analysis, we predict diphoton transverse momentum distributions in
gluon-gluon scattering in wide ranges of kinematic parameters at the Fermilab
  Tevatron collider and the CERN Large Hadron Collider.


title: Theory Summary: Quark Matter 2006

abstract: I report on recent theoretical developments at Quark Matter 2006.


title: (Not) Summing over Kaluza-Kleins

abstract:
  Models in extra-dimensions have unique features. Many of their surprising
properties simply result from the underlying 5D structure. This structure shows
up as ``Sum Rules'' involving the whole tower of Kaluza-Kleins. In this paper,
we present a holographic shortcut and derive these results without solving the
eigenvalue problem: we express 4D physical quantities directly in terms of the
5D metric. In warped space, one can go further and isolate the effect of the
new physics sector. This method can be used for any 5D model, and we apply it
here to the case of holographic QCD and technicolor.


title:
Flavor separation of the Boer-Mulders function from unpolarized $\pi^-
  p$ and $\pi^- D$ Drell-Yan processes

abstract:
  We show that measuring the $\cos 2\phi $ angular dependence in unpolarized
Drell-Yan processes with $\pi^-$ beams colliding on proton and deuteron targets
can determine the ratio of the Boer-Mulders functions for $d$ and $u$ quarks
inside the proton $h_1^{\perp,d}/h_1^{\perp,u}$, which is still lack of
theoretical constraint. The comparison of the $\cos 2 \phi$ asymmetries
measured in unpolarized $\pi^- p$ and $\pi^- D$ Drell-Yan processes, which are
accessible at CERN by the COMPASS collaboration, can help to discriminate
whether $h_1^\perp$ effects or QCD vacuum effects are preferred by data.


title: Update analysis of two-body charmed $B$ meson decays

abstract:
  The charmed B decays, $B\to DP, ~D^*P$ and $DV$, are re-analyzed using the
latest experimental data, where $P$ and $V$ denote the pseudoscalar meson and
vector meson, respectively. We perform global fits under the assumption of
flavor SU(3) symmetry. The size of the decay amplitudes and the strong phases
between the topologically distinct amplitudes are studied. Predictions of the
related $B_s$ decay rates are made based upon the fitted results. We also note
a serious SU(3) symmetry breaking or inconsistency in the $DV$ sector.


title: The six-quark structure of long-lived $D$-mesons and $\psi/J$

abstract:
  The harmonic quarks are applied to the analysis of quark structures of
long-lived $D$-mesons and $\psi/J$. In the harmonic quark model the quarks of
long-lived mesons ($\pi^0$, $\pi^\pm$, $K^\pm$, $K^0$, $B^0$, $B^\pm$) are
weakly relativistic objects with the excess energy of valent quarks less than 7
MeV. In contrast to this, the long-lived $D$-mesons in two-quark standard have
the apparent excess energies of a few hundred MeV. It was established that all
long-lived $D$-mesons and $\psi/J$ have the six-quark structures. There are two
valent quarks and two additional neutral quark-antiquark $u$-pairs. The quark
structures of $D^0$, $D^\pm$, $D_s^\pm$ and $\psi/J$ are given. The excess
energies of six-quark $D$-mesons also does not exceed 7 MeV. A six-color quark
composition and the absence of two-quark $D$-mesons in the context of QCD are
discussed.


title: Heavy-to-light form factors: sum rules on the light cone and beyond

abstract:
  We report the first systematic analysis of the off-light-cone effects in sum
rules for heavy-to-light form factors. These effects are investigated in a
model based on scalar constituents, which allows a technically rather simple
analysis but has the essential features of the analogous QCD calculation. The
correlator relevant for the extraction of the heavy-to-light form factor is
calculated in two different ways: first, by adopting the full Bethe-Salpeter
amplitude of the light meson and, second, by performing the expansion of this
amplitude near the light cone $x^2=0$. We demonstrate that the contributions to
the correlator from the light-cone term $x^2=0$ and the off-light-cone terms
$x^2\ne 0$ have the same order in the $1/m_Q$ expansion. The light-cone
correlator, corresponding to $x^2=0$, is shown to systematically overestimate
the full correlator, the difference being $\sim \Lambda_{\rm QCD}/\delta$, with
$\delta$ the continuum subtraction parameter of order 1 GeV. Numerically, this
difference is found to be 10-20%.


title: Progress on chiral symmetry breaking in a strong magnetic field

abstract:
  The problem of chiral symmetry breaking in QED in a strong magnetic field is
briefly reviewed. Recent progress on issues regarding the gauge fixing
independence of the dynamically generated fermion mass is discussed.

categories: hep-ph astro-ph cond-mat.mes-hall hep-th


title: Enhanced effects on extracting \gamma from untagged B^0 and B_s decays

abstract:
  The weak phase \gamma can be determined using untagged B^0\to DK_S or B_s\to
D\phi, D\eta^{(')} decays. In the past, the small lifetime difference y\equiv
\Delta\Gamma/(2\Gamma) has been neglected in B^0, while the CP violating
parameter \epsilon\equiv 1-|q/p|^2 has been neglected in both B^0-\bar B^0 and
B_s-\bar B_s mixing. We estimate the effect of neglecting y and \epsilon. We
find that in D decays to flavor states this introduces a systematic error,
which is enhanced by a large ratio of Cabibbo-allowed to doubly
Cabibbo-suppressed D decay amplitudes.


title:
What to learn from dilepton transverse momentum spectra in heavy-ion
  collisions?

abstract:
  Recently the NA60 collaboration has presented high precision measurements of
dimuon spectra double differential in invariant mass $M$ and transverse pair
momentum $p_T$ in In-In collisions at $158 {\rm AGeV}$. While the
$M$-dependence is important for an understanding of in-medium changes of light
vector mesons and is $p_T$ integrated insensitive to collective expansion, the
$p_T$-dependence arises from an interplay between emission temperature and
collective transverse flow. This fact can be exploited to derive constraints on
the evolution model and in particular on the contributions of different phases
of the evolution to dimuon radiation into a given $M$ window. We present
arguments that a thermalized evolution phase with $T > 170 {\rm MeV}$ leaves
its imprint on the spectra.


title:
QCD factorisation and flavour symmetries illustrated in B_d,s -> KK
  decays

abstract:
  We present a new analysis of B_d,s -> KK modes within the SM, relating them
in a controlled way through SU(3)-flavour symmetry and QCD-improved
factorisation. We propose a set of sum rules for B_d,s -> K^0 \bar K^0
observables. We determine B_s -> KK branching ratios and CP-asymmetries as
functions of A_dir(B_d -> K^0 \bar K^0), with a good agreement with current
experimental measurements of CDF. Finally, we predict the amount of U-spin
breaking between B_d -> pi+ pi- and B_s -> K+K-.


title: Peristaltic modes of single vortex in the Abelian Higgs model

abstract:
  Using the Abelian Higgs model, we study the radial excitations of single
vortex and their propagation modes along the vortex line. We call such
beyond-stringy modes {\it peristaltic} modes of single vortex. With the profile
of the static vortex, we derive the vortex-induced potential, i.e.,
single-particle potential for the Higgs and the photon field fluctuations
around the static vortex, and investigate the coherently propagating
fluctuations which corresponds to the vibration of the vortex. We derive,
analyze and numerically solve the field equations of the Higgs and the photon
field fluctuations around the static vortex with various Ginzburg-Landau
parameter $\kappa$ and topological charge $n$. Around the BPS value or critical
coupling $\kappa^2$=1/2, there appears a significant correlation between the
Higgs and the photon field fluctuations mediated by the static vortex. As a
result, for $\kappa^2$=1/2, we find the characteristic {\it new} discrete pole
of the peristaltic mode corresponding to the quasi-bound-state of coherently
fluctuating fields and the static vortex. We investigate its excitation energy,
correlation energy of coherent fluctuations, spatial distributions, and the
resulting magnetic flux behavior in detail. Our investigation covers not only
usual Type-II vortices with $|n|$=1 but also Type-I and Type-II vortices with
$n\in Z$ for the application to various general systems where the vortex-like
objects behave as the essential degrees of freedom.


title: Pion form factor at very large $Q^2$

abstract:
  The pion form factor at very large $Q^2$ is obtained by using a new pion wave
function. It shows that when $Q^2>>(1.8GeV)^2$ the pion form factor reaches the
asymptotic limit ${\alpha_s(Q^2)\over Q^2}$


title: Some Comments About The High Energy Limit of QCD

abstract:
  I argue that the physics of the scattering of very high energy strongly
interacting particles is controlled by a new, universal form of matter, the
Color Glass Condensate. This matter is the dominant contribution to the low x
part of a hadron wavefunction. In collisions, this matter almost
instantaneously turns into a Glasma. The Glasma initially has strong
longitudinal color electric and magnetic fields, with topological charge. These
fields melt into gluons. Due to instabilities, quantum noise is converted into
classical turbulence, which may be responsible for the early thermalization
seen in heavy ion collisions at RHIC.


title: Summary Talk for ISMD 06

abstract:
  I give an overview of the presentations at the International Symposium on
Multiparticle Dynamics


title: Trapped Quintessential Inflation from Flux Compactifications

abstract:
  Quintessential inflation is studied using a string modulus as the inflaton -
quintessence field. It is assumed that the modulus crosses an enhanced symmetry
point (ESP) in field space. Particle production at the ESP temporarily traps
the modulus resulting in a period of inflation. After reheating, the modulus
freezes due to cosmological friction at a large value, such that its scalar
potential is dominated by contributions due to fluxes in the extra dimensions.
The modulus remains frozen until the present, when it can become quintessence.


title: Multiparticle production in the Glasma at NLO and plasma instabilities

abstract:
  We discuss the relation between multi-particle production in the Glasma at
next-to-leading order and the physics of plasma instabilities.


title:
On the possible resolution of the B-meson decay polarization anomaly in
  R-parity violating SUSY

abstract:
  We examine the possible resolution of the recently observed polarization
anomaly in B0(bar{B}0) -> phi K*0(bar{K}*0) decay within R-parity violating
(RPV) SUSY. We show that a combination of the superpotential trilinear
(RPV)-interactions, with the couplings lambda', and the soft SUSY breaking
bilinear RPV, sneutrino-Higgs mixing, proportional to tilde{mu}**2, can
potentially generate the effective operators with the chirality structure
necessary to account for this anomaly. However, we demonstrate that the
existing experimental data on Bs -> mu+ mu- decay lead to stringent upper
limits on the Wilson coefficients of these operators, which are about two
orders of magnitude below the values required for the resolution of the B-decay
polarization anomaly, and, therefore, it can hardly be explained within the RPV
SUSY framework.
  As a byproduct result of our analysis we derive new limits on the products of
the soft bilinear and the superpotential trilinear RPV-parameters of the form
tilde{mu}**2 * lambda'.


title: The rigidity of crystalline color superconducting quark matter

abstract:
  We calculate the shear modulus of crystalline color superconducting quark
matter, showing that this phase of dense, but not asymptotically dense,
three-flavor quark matter responds to shear stress like a very rigid solid. To
evaluate the shear modulus, we derive the low energy effective Lagrangian that
describes the phonons that originate from the spontaneous breaking of
translation invariance by the spatial modulation of the gap parameter $\Delta$.
These massless bosons describe space- and time-dependent fluctuations of the
crystal structure and are analogous to the phonons in ordinary crystals. The
coefficients of the spatial derivative terms of the phonon effective Lagrangian
are related to the elastic moduli of the crystal; the coefficients that encode
the linear response of the crystal to a shearing stress define the shear
modulus. We analyze the two particular crystal structures which are
energetically favored over a wide range of densities, in each case evaluating
the phonon effective action and the shear modulus up to order $\Delta^2$ in a
Ginzburg-Landau expansion, finding shear moduli which are 20 to 1000 times
larger than those of neutron star crusts. The crystalline color superconducting
phase has long been known to be a superfluid -- by picking a phase its order
parameter breaks the quark-number $U(1)_B$ symmetry spontaneously. Our results
demonstrate that this superfluid phase of matter is at the same time a rigid
solid. We close with a rough estimate of the pinning force on the rotational
vortices which would be formed embedded within this rigid superfluid upon
rotation. Our results raise the possibility that (some) pulsar glitches could
originate within a quark matter core deep within a neutron star.

categories: hep-ph astro-ph cond-mat.supr-con gr-qc nucl-th


title: On The Equivalence of Soft and Zero-Bin Subtractions

abstract:
  Zero-bin subtractions are required to avoid double counting soft
contributions in collinear loop integrals in Soft-Collinear Effective Theory
(SCET). In traditional approaches to factorization, double counting is avoided
by dividing jet functions by matrix elements of soft Wilson lines. In this
paper, we compare the two approaches to double counting, studying the quark
form factor and deep inelastic scattering (DIS) as x_B \to 1 as examples. We
explain how the zero-bin subtractions in SCET are required to reproduce the
well-established factorization theorem for DIS as x_B \to 1. We study one-loop
virtual contributions to the quark form factor and real gluon emission diagrams
in DIS. The two approaches to double counting are equivalent if dimensional
regularization (DR) is used to regulate infrared (IR) divergences. We discuss
in detail ambiguities in the calculation of one-loop scaleless integrals in DR
in SCET and perturbative QCD. We also demonstrate a nontrivial check of the
equivalence of the zero-bin subtraction and the soft Wilson line subtraction in
the virtual two-loop Abelian contributions to the quark form factor.


title: Correlation of small-x gluons in impact parameter space

abstract:
  In the framework of the QCD dipole model at high energy, we present an
analytic evaluation of the dipole pair density in two limits in which the
parent dipole is much larger/smaller than the distance between the two child
dipoles. Due to conformal symmetry, the two limits give an identical result.
The power-law correlation between dipoles explicitly breaks the factorization
of target-averaged scattering amplitudes.


title: Electrogenesis via primordial black holes

abstract:
  It was recently shown that the vanishing of the Coulomb field related to the
electric charge of a black hole by virtue of a tiny but non-vanishing photon
mass can produce an electric asymmetry in the universe. This process can have
place both at a cosmological early stage, through primordial black holes, and
in contemporary universe, by means of supermassive black holes at galactic
centers. Possible consequences of the latter case about the role of
electrogenesis in the generation of magnetic fields coherent on galactic scale
have been investigated. In this paper we will discuss the electrogenesis
mediated by primordial black holes and analyze different realizations of the
mechanism in this case.


title:
Fluctuations and the Phase Transition in a Chiral Model with Polyakov
  Loops

abstract:
  We explore the NJL model with Polyakov loops for a system of three colors and
two flavors within the mean-field approximation, where both chiral symmetry and
confinement are taken into account. We focus on the phase structure of the
model and study the chiral and Polyakov loop susceptibilities.


title: The tau lepton anomalous magnetic moment

abstract:
  We review the Standard Model prediction of the tau lepton g-2 presenting
updated QED and electroweak contributions, as well as recent determinations of
the leading-order hadronic term, based on the low energy e+e- data, and of the
hadronic light-by-light one.


title: Electron, muon and tau magnetic moments: a theoretical update

abstract:
  Recent Standard Model predictions for the anomalous magnetic moments of the
electron, muon and tau lepton are reviewed and compared to the latest
experimental values.


title: Recent results on Vus from KLOE, KTeV and NA48

abstract:
  In the last few years a significant progress in the kaon physics has been
made by three experiments - KLOE, KTeV and NA48. The reflection of their
results to the extraction of the parameter Vus of the CKM matrix is presented.
The obtained combined result for Vus = 0.2241(15) together with the latest
value for Vud = 0.97377(27) are consistent with the Standard Model and the
unitarity of the CKM matrix.


title:
Global analysis of the data from solar neutrinos having transition
  magnetic moment together with KamLAND data

abstract:
  A global analysis of the solar neutrino data from all solar neutrino
experiments combined with the KamLAND data is presented assuming that the solar
neutrino deficit is due to the matter-enhanced spin-flavor precession effect.
The allowed regions are calculated and a limit is found for the electron
neutrino magnetic moment at 0.95CL.


title:
Nucleon form-factors of the energy momentum tensor in the chiral
  quark-soliton model

abstract:
  The nucleon form factors of the energy-momentum tensor are studied in the
large-Nc limit in the framework of the chiral quark-soliton model.


title:
The pion mass dependence of the nucleon form-factors of the energy
  momentum tensor in the chiral quark-soliton model

abstract:
  The nucleon form factors of the energy-momentum tensor are studied in the
large-Nc limit in the framework of the chiral quark-soliton model for model
parameters that simulate physical situations in which pions are heavy. This
allows for a direct comparison to lattice QCD results.


title: Anomalous diffusion of pions at RHIC

abstract:
  After pointing out the difference between normal and anomalous diffusion, we
consider a hadron resonance cascade (HRC) model simulation for particle
emission at RHIC and point out, that rescattering in an expanding hadron
resonance gas leads to a heavy tail in the source distribution. The results are
compared to recent PHENIX measurements of the tail of the particle emitting
source in Au+Au collisions at RHIC. In this context, we show, how can one
distinguish experimentally the anomalous diffusion of hadrons from a second
order QCD phase transition.


title: Topics in Leptogenesis

abstract:
  Baryogenesis via leptogenesis provides an appealing mechanism to explain the
observed baryon asymmetry of the Universe. Recent refinements in the
understanding of the dynamics of leptogenesis include detailed studies of the
effects of lepton flavors and of the role possibly played by the lepton
asymmetries generated in the decays of the heavier singlet neutrinos $N_{2,3}$.
In this talk I present a short review of these recent developments in the
theory of leptogenesis.


title: A model for fermion masses and lepton mixing in SO(10) x A4

abstract:
  The discrete flavor symmetry A4 explains very well neutrino data at low
energy, but it seems difficult to extend it to grand unified models since in
general left-handed and right-handed fields belong to different A4
representations. Recently it has been proposed a model where all the fermions
equally transform under A4. We study here a concrete SO(10) realization of such
a model providing small neutrino masses through the seesaw mechanism. We fit at
tree level the charged fermion masses run up to the unification scale. Some
fermion masses properties come from the SO(10) symmetry while lepton mixing
angles are consequence of the A4 properties. Moreover, our model predicts the
absolute value of the neutrino masses, these ones are in the range $m_\nu\simeq
0.005-0.052 eV$.


title:
A new contribution to the nuclear modification factor of non-photonic
  electrons in Au+Au collisions at sqrt(s) = 200 GeV

abstract:
  We investigate the effect of the so-called anomalous baryon/meson enhancement
to the nuclear modification factor of non-photonic electrons in Au+Au
collisions at sqrt(s) = 200 GeV. It is demonstrated that an enhancement of the
charm baryon/meson ratio, as it is observed for non-strange and strange
hadrons, can be responsible for part of the amplitude of the nuclear
modification factor of non-photonic electrons. About half of the measured
suppression of non-photonic electrons in the 2-4 pt range can be explained by a
charm baryon/meson enhancement of 5. This contribution to the non-photonic
electron nuclear modification factor has nothing to do with heavy quark energy
loss.


title: Recoil Detection of the Lightest Neutralino in MSSM Singlet Extensions

abstract:
  We investigate the correlated predictions of singlet extended MSSM models for
direct detection of the lightest neutralino with its cosmological relic
density. To illustrate the general effects of the singlet, we take heavy
sleptons and squarks. We apply LEP, $(g-2)_\mu$ and perturbativity constraints.
We find that the WMAP upper bound on the cold dark matter density limits much
of the parameter space to regions where the lightest neutralino can be
discovered in recoil experiments. The results for the NMSSM and UMSSM are
typically similar to the MSSM since their light neutralinos have similar
compositions and masses. In the n/sMSSM the neutralino is often very light and
its recoil detection is within the reach of the CDMS II experiment. In general,
most points in the parameter spaces of the singlet models we consider are
accessible to the WARP experiment.


title: t' at the LHC: the physics of discovery

abstract:
  A search for a fourth family at the LHC is presently a low priority, but we
argue that an effective search can be conducted early with only a few inverse
femtobarns of data. We discuss a method based on invariant masses of single
jets for identifying the $W$'s originating from heavy quark decays. This can
significantly increase signal to background in the reconstruction of the $t'$
mass. We also study the various types of physics that can impact the background
estimate, most notably higher order effects, initial state radiation, and
models of the underlying event.


title: A Collider Signature of the Supersymmetric Golden Region

abstract:
  Null results of experimental searches for the Higgs boson and the
superpartners imply a certain amount of fine-tuning in the electroweak sector
of the Minimal Supersymmetric Standard Model (MSSM). The "golden region" in the
MSSM parameter space is the region where the experimental constraints are
satisfied and the amount of fine-tuning is minimized. In this region, the stop
trilinear soft term is large, leading to a significant mass splitting between
the two stop mass eigenstates. As a result, the decay of the heavier stop into
the lighter stop and a Z boson is kinematically allowed throughout the golden
region. We propose that the experiments at the Large Hadron Collider (LHC) can
search for this decay through an inclusive signature, Z+2jb+missing Et+X. We
evaluate the Standard Model backgrounds for this channel, and identify a set of
cuts that would allow detection of the supersymmetric contribution at the LHC
for the MSSM parameters typical of the golden region. We also discuss other
possible interpretations of a signal for new physics in the Z+2jb+missing Et+X
channel, and suggest further measurements that could be used to distinguish
among these interpretations.


title: SO(10) unified models and soft leptogenesis

abstract:
  Motivated by the fact that, in some realistic models combining SO(10) GUTs
and flavour symmetries, it is not possible to achieve the required baryon
asymmetry through the CP asymmetry generated in the decay of right-handed
neutrinos, we take a fresh look on how deep this connection is in SO(10). The
common characteristics of these models are that they use the see-saw with
right-handed neutrinos, predict a normal hierarchy of masses for the neutrinos
observed in oscillating experiments and in the basis where the right-handed
Majorana mass is diagonal, the charged lepton mixings are tiny.
  In addition these models link the up-quark Yukawa matrix to the neutrino
Yukawa matrix Y^\nu with the special feature of Y^\nu_{11}-> 0 Using this
condition, we find that the required baryon asymmetry of the Universe can be
explained by the soft leptogenesis using the soft B parameter of the second
lightest right-handed neutrino whose mass turns out to be around 10^8 GeV. It
is pointed out that a natural way to do so is to use no-scale supergravity
where the value of B ~1 GeV is set through gauge-loop corrections.


title:
Nuclear Modification to Parton Distribution Functions and Parton
  Saturation

abstract:
  We introduce a generalized definition of parton distribution functions (PDFs)
for a more consistent all-order treatment of power corrections. We present a
new set of modified DGLAP evolution equations for nuclear PDFs, and show that
the resummed $\alpha_s A^{1/3}/Q^2$-type of leading nuclear size enhanced power
corrections significantly slow down the growth of gluon density at small-$x$.
We discuss the relation between the calculated power corrections and the
saturation phenomena.


title: Mixed Bino-Wino-Higgsino Dark Matter in Gauge Messenger Models

abstract:
  Almost degenerate bino and wino masses at the weak scale is one of unique
features of gauge messenger models. The lightest neutralino is a mixture of
bino, wino and higgsino and can produce the correct amount of the dark matter
density if it is the lightest supersymmetric particle. Furthermore, as a result
of squeezed spectrum of superpartners which is typical for gauge messenger
models, various co-annihilation and resonance regions overlap and very often
the correct amount of the neutralino relic density is generated as an interplay
of several processes. This feature makes the explanation of the observed amount
of the dark matter density much less sensitive to fundamental parameters. We
calculate the neutralino relic density assuming thermal history and present
both spin independent and spin dependent cross sections for the direct
detection. We also discuss phenomenological constraints from b to s gamma and
muon g-2 and compare results of gauge messenger models to well known results of
the mSUGRA scenario.


title: Neutral kaon mixing from 2+1 flavor Domain Wall QCD

abstract:
  We present the first results for neutral kaon mixing using 2+1 flavors of
domain wall fermions. A new approach is used to extrapolate to the physical up
and down quark masses from our numerical studies with pion masses in the range
240 -- 420 MeV; only $SU(2)_L \times SU(2)_R$ chiral symmetry is assumed and
the kaon is not assumed to be light. Our main result is $B_K^{\bar{\rm MS}}(2
\mathrm{GeV}) = 0.524(10)(28)$ where the first error is statistical and the
second incorporates estimates for all systematic errors.


title:
The \tau -> \mu \bar{\nu_i} \nu_i decay in the Randall Sundrum
  background with localized U(1)_Y gauge boson

abstract:
  We study the effects of localization of the U(1)_Y gauge boson around the
visible brane and the contributions of the KK modes of Z bosons on the BR of
the LFV \tau -> \mu \bar{\nu_i} \nu_i decay. We observe that the BR is
sensitive to the amount of localization of Z boson in the bulk of the Randall
Sundrum background.


title:
The Effects of Fourth Generation on the Total Branching Ratio and the
  Lepton Polarization in $\Lambda_b \rar \Lambda \ell^+ \ell^-$ decay

abstract:
  This study investigates the influence of the fourth generation quarks on the
total branching ratio and the single lepton polarizations in \Lambda_b -->
\Lambda \ell^+ \ell^- decay. Taking $|V_{t's}V_{t'b}| {0.01-0.03} with phase
just below $90^\circ$, which is consistent with the b\to s\ell^+\ell^- rate and
the B_s mixing parameter \Delta m_{B_s}, we obtain that the total branching
ratio and the single lepton(\mu, \tau) polarizations are quite sensitive to the
existence of fourth generation. It can serve as a good tool to search for new
physics effects, precisely, to search for the fourth generation quarks(t', b').


title:
The exact eigenstates of the neutrino mass matrix without CP-phase
  violation

abstract:
  In this paper we obtain the exact mass-eigenstates of the Majorana physical
neutrinos. We start by taking into account a general $3\times3$ mass matrix
without any CP-phase violation. It is then diagonalized by exactly solving an
appropriate set of equations. The solution supplies straightforwardly the mass
eigenvalues depending on the diagonal entries and mixing angles. Finally, the
consequences of these analytical expressions are discussed assuming various
phenomenological restrictions such as conserving the global lepton number
$L=L_{e}-L_{\mu}-L_{\tau}$ and the $\mu-\tau$ interchange symmetry. The minimal
absolute mass in the neutrino sector is also obtained since the two plausible
scenarios invoked above are employed.


title: Supersymmetric Higgs and Radiative Electroweak breaking

abstract:
  We review the mechanism of radiative electroweak symmetry breaking taking
place in SUSY versions of the standard model. We further discuss different
proposals for the origin of SUSY-breaking and the corresponding induced
SUSY-breaking soft terms. Several proposals for the understanding of the little
hierarchy problem are critically discussed.


title: Vacuum Birefringence Caused by Arbitrary Spin Particles

abstract:
  We study the propagation of a linearly polarized laser beam in the external
transverse magnetic field taking into consideration the vacuum polarization by
arbitrary spin particles. Induced ellipticity of the beam are evaluated using
the effective Lagrangian. With the help of the PVLAS experimental data, we
obtain bounds on masses of charged higher spin particles contributed to
ellipticity.


title: Solving problems of 4D minimal SO(10) model in a warped extra dimension

abstract:
  The minimal renormalizable supersymmetric SO(10) model, an SO(10) framework
with only one 10 and one 126 Higgs multiplets in the Yukawa sector, is
attractive because of its high predictive power for the neutrino oscillation
data. However, this model suffers from problems related to running of gauge
couplings. The gauge coupling unification may be spoiled due to the presence of
Higgs multiplets much lighter than the grand unification (GUT) scale. In
addition, the gauge couplings blow up around the GUT scale because of the
presence of Higgs multiplets of large representations. We consider the minimal
SO(10) model in the warped extra dimension and find a possibility to solve
these problems.


title: MiniBooNE and a (CP)^2 = -1 sterile neutrino

abstract:
  It has been taken as granted that the observation of two independent
mass-squared differences necessarily fixes the number of underlying mass
eigenstates as three, and that the addition of a sterile neutrino provides an
additional mass-squared difference. The purpose of this Letter is to argue that
if one considers a sterile neutrino component that belongs to the (CP)^2 = - 1
sector, then both of the stated claims are false. We also outline how the
results reported here, when combined with the forthcoming MiniBooNE data and
other experiments, can help settle the issue of the CP properties of the
sterile neutrino; if such a component does indeed exist.


title:
Correlation between lepton flavor violation and B_{(d,s)} -
  \bar{B}_{(d,s)} mixing in SUSY GUT

abstract:
  Motivated by the recent measurements of the B_s-\bar{B}_s mass difference
from the D0 and CDF collaborations, we probe new physics effects in the
B_q-\bar{B}_q mixing within the context of the supersymmetric grand unified
model (SUSY GUT). We find that new physics effects in B_{s(d)}-\bar{B}_{s(d)}
mixing lead to the correlated information in the branching fractions of the
lepton flavor violating decays, which may serve as a test of the SUSY GUT. We
also discuss the implication of such new physics effects on the quark-lepton
complementarity in the neutrino mixings.


title: Dark Matter Candidates: What Cold, ..and What's Not

abstract:
  In this brief review of recent theoretical developments associated with the
search for dark matter I describe the following: why baryons are now ruled out
as dark matter candidates; SUSY WIMPS and signatures in the MSSM and NMSSM why
claimed indirect signatures are probably not WIMP related, why axions may be of
new interest, how WIMP detection might tell us about the galactic halo, and how
theorists are preparing to avoid the next generation of experimental
constraints.


title: Hard Photoproduction at HERA

abstract:
  In view of possible photoproduction studies in ultraperipheral heavy-ion
collisions at the LHC, we briefly review the present theoretical understanding
of photons and hard photoproduction processes at HERA, discussing the
production of jets, light and heavy hadrons, quarkonia, and prompt photons. We
address in particular the extraction of the strong coupling constant from
photon structure function and inclusive jet measurements, the infrared safety
and computing time of jet definitions, the sensitivity of dijet cross sections
on the parton densities in the photon, factorization breaking in diffractive
dijet production, the treatment of the heavy-quark mass in charm production,
the relevance of the color-octet mechanism for quarkonium production, and
isolation criteria for prompt photons.


title: Survival probability for high mass diffraction

abstract:
  Based on the calculation of survival probabilities, we discuss the problem of
extracting the value of $G_{3P}$, the triple Pomeron 'bare' coupling constant,
by comparing the large rapidity gap single high mass diffraction data in
proton-proton scattering and $J/\Psi$ photo and DIS production. For p-p
scattering the calculation in a three amplitude rescattering eikonal model,
predicts the survival probability to be an order of magnitude smaller than for
the two amplitude case. The survival probabilities calculation for photo and
DIS $J/\Psi$ production is made in a dedicated model. In this process we show
that, even though its survival probability is considerably larger than in p-p
scattering, its value is below unity and cannot be neglected in the data
analysis. We argue that, regardless of the uncertainties in the suggested
procedure, its outcome is important both with regards to a realistic estimate
of $G_{3P}$, and the survival probabilities relevant to LHC experiments.


title:
GENXICC: A Generator for Hadronic Production of the Double Heavy Baryons
  $\Xi_{cc}$, $\Xi_{bc}$ and $\Xi_{bb}$

abstract:
  We write down a generator program for the hadronic production of the
double-heavy baryons $\Xi_{cc}$, $\Xi_{bc}$ and $\Xi_{bb}$ according to
relevant publications. We name it as GENXICC and we test it by comparing its
numerical results with those in references. It is written in a
PYTHIA-compatible format and it can be easily implemented into PYTHIA. GENXICC
is also written in modularization manner, with {\bf make}, a GNU C compiler,
one may apply the generator to various situations or experimental environments
very conveniently.


title:
The quark-antiquark potential at finite temperature and the dimension
  two gluon condensate

abstract:
  A recently proposed phenomenological model, which includes non perturbative
effects from dimension two gluon condensates, is applied to analyze the
available lattice data for the heavy quark free energy in the deconfined phase
of quenched QCD. For large $q\bar{q}$ separations we recover previous results
for the Polyakov loop, exhibiting unequivocal condensate contributions. For the
$q\bar{q}$ potential at finite temperature and finite separation we find that a
good overall description of the lattice data can be achieved once the
condensate is properly accounted for. In addition, the model predicts a duality
between the zero temperature potential as a function of the $q\bar{q}$
separation, on the one hand, and the quark selfenergy as a function of the
temperature, on the other, which turns out to be satisfied to a high degree by
the lattice data.


title: R-Parity Violation and Non-Abelian Discrete Family Symmetry

abstract:
  We investigate the implications of R-parity violating operators in a model
with family symmetry. The family symmetry can determine the form of R-parity
violating operators as well as the Yukawa matrices responsible for fermion
masses and mixings. In this paper we consider a concrete model with non-abelian
discrete symmetry Q_6 which contains only three R-parity violating operators.
We find that ratios of decay rates of the lepton flavor violating processes are
fixed thanks to the family symmetry, predicting BR(tau to 3e)/BR(tau to 3mu) ~
4 m_{mu}^2/m_{tau}^2.


title:
Global analysis of solar neutrinos (assumed to be Majorana particles)
  together with the new KamLAND data

abstract:
  Assuming neutrinos are Majorana particles having non-zero transition magnetic
moments, a global analysis of solar neutrino data, together with the new
KamLAND data, is presented in the resonant spin flavor precession (RSFP)
framework. The allowed regions from solar data combined with new KamLAND data
are examined at 0.95 confidence level (CL). The electron antineutrino flux from
the Sun is calculated, and via the results obtained several limits are set for
muB.


title: On the electroproduction on nuclei

abstract:
  Recent data on the electroproduction of hadrons on nuclei are discussed. The
effects of the nuclear absorption are investigated using the Lund model for
electroproduction on nucleons. A simple geometrical model with a minimal number
of assumptions and free parameters is shown to describe the data reasonably
well.


title: Effects of non-standard interactions in the MINOS experiment

abstract:
  We investigate the effects of non-standard interactions on the determination
of the neutrino oscillation parameters $\Delta m_{31}^2$, $\theta_{23}$, and
$\theta_{13}$ in the MINOS experiment. We show that adding non-standard
interactions to the analysis leads to an extension of the allowed parameter
space to larger values of $\Delta m_{31}^2$ and smaller $\theta_{23}$, and
basically removes all predictability for $\theta_{13}$. In addition, we discuss
the sensitivities to the non-standard interaction parameters of the MINOS
experiment alone. In particular, we examine the degeneracy between
$\theta_{13}$ and the non-standard interaction parameter $\eps_{e\tau}$. We
find that this degeneracy is responsible for the removal of the $\theta_{13}$
predictability and that the possible bound on $|\eps_{e\tau}|$ is competitive
with direct bounds only if a more stringent external bound on $\theta_{13}$ is
applied.


title: Axions, their Relatives and Prospects for the Future

abstract:
  The observation of a non-vanishing rotation of linear polarized laser light
after passage through a strong magnetic field by the PVLAS collaboration has
renewed the interest in light particles coupled to photons. Axions are a
species of such particles that is theoretically well motivated. However, the
relation between coupling and mass predicted by standard axion models conflicts
with the PVLAS observation. Moreover, light particles with a coupling to
photons of the strength required to explain PVLAS face trouble from
astrophysical bounds. We discuss models that can avoid these bounds. Finally,
we present some ideas to test these possible explanations of PVLAS
experimentally.


title: Recent Developments in Neutrino Phenomenology

abstract:
  The first phase of studies of the neutrino mass and mixing is essentially
over. The outcome is the discovery of non-zero neutrino mass and determination
of the dominant structure of the lepton mixing matrix. In some sense this phase
was very simple, and nature was very collaborative with us: Two main effects -
the vacuum oscillations and the adiabatic conversion in matter (the MSW-effect)
- provide complete interpretation of the experimental results. Furthermore,
with the present accuracy of measurements the $3\nu-$mixing analysis is
essentially reduced to the $2\nu$ consideration. I will present a concise and
comprehensive description of this first phase. The topics include: (i) the
concept of neutrino mixing in vacuum and matter; (ii) physics of the
oscillations and adiabatic conversion; (iii) the experimental evidences of the
flavor transformations and determination of the oscillation parameters. Some
implications of the obtained results are discussed. Comments are given on the
next phase of the field that will be much more involved.


title:
Isospin breaking in scalar and pseudoscalar channels of radiative
  $J/\psi$-decays

abstract:
  In the framework of simple assumption on factorizing a mixing of vector state
with isoscalar components in effective amplitudes of isospin breaking caused by
the electromagnetic quark current, a branching fraction of radiative $J/\psi\to
a_0$ transition is evaluated at the level of $3\cdot 10^{-3}$.


title: Solutions to large B and L breaking in the Randall-Sundrum model

abstract:
  The stability of proton and neutrino masses are discussed in the
Randall-Sundrum model. We show that relevant operators should be suppressed, if
the hierarchical Yukawa matrices are explained only by configurations of
wavefunctions for fermions and the Higgs field along the extra dimension. We
assume a $Z_N$ discrete gauge symmetry to suppress those operators. In the
Dirac neutrino case, there is an infinite number of symmetries which may forbid
the dangerous operators. In the Majorana neutrino case, the discrete gauge
symmetries should originate from $U(1)_X$ gauge symmetries which are broken on
the Planck brane. We also comment on the $n-\bar{n}$ oscillation as a
phenomenon which can distinguish those discrete gauge symmetries.


title:
The associated productions of the new gauge boson $B_{H}$ in the
  littlest Higgs model with a SM gauge boson via $e^+e^-$ collision

abstract:
  With the high energy and luminosity, the planned ILC has the considerable
capability to probe the new heavy particles predicted by the new physics
models. In this paper, we study the potential to discover the lightest new
gauge boson $B_{H}$ of the littlest Higgs model via the processes $e^+e^- \to
\gamma (Z)B_H$ at the ILC. The results show that the production rates of these
two processes are large enough to detect $B_H$ in a wide range of the parameter
space, specially for the process $e^+e^- \to \gamma B_H$. Furthermore, there
exist some decay modes for $B_H$ which can provide the typical signal and clean
background. Therefore, the new gauge boson $B_H$ should be observable via these
production processes with the running of the ILC if it exists indeed.


title: Nucleon decay in gauge unified models with intersecting D6-branes

abstract:
  Baryon number violation is discussed in gauge unified orbifold models of type
II string theory with intersecting Dirichlet branes. We consider setups of
D6-branes which extend along the flat Minkowski space-time directions and wrap
around 3-cycles of the internal 6-d manifold. The discussion is motivated by
the enhancement effect of low energy amplitudes anticipated for M-theory and
type II string theory models with matter modes localized at points of the
internal manifold. The conformal field theory formalism is used to evaluate the
open string amplitudes at tree level. We study the single baryon number
violating processes of dimension 6 and 5, involving four quarks and leptons and
in supersymmetry models, two pairs of matter fermions and superpartner
sfermions. The higher order processes associated with the baryon number
violating operators of dimension 7 and 9 are also examined, but in a
qualitative way. We discuss the low energy representation of string theory
amplitudes in terms of infinite series of poles associated to exchange of
string Regge resonance and compactification modes. The comparison of string
amplitudes with the equivalent field theory amplitudes is first studied in the
large compactification radius limit. Proceeding next to the finite
compactification radius case, we present a numerical study of the ratio of
string to field theory amplitudes based on semi-realistic gauge unified
non-supersymmetric and supersymmetric models employing the Z3 and Z2xZ2
orbifolds. We find a moderate enhancement of string amplitudes which becomes
manifest in the regime where the gauge symmetry breaking mass parameter exceeds
the compactification mass parameter, corresponding to a gauge unification in a
seven dimensional space-time.


title: The mass gap and solution of the gluon confinement problem in QCD

abstract:
  We propose to realize a mass gap in QCD not imposing the transversality
condition on the full gluon self-energy, while preserving the color gauge
invariance condition for the full gluon propagator. Since due to color
confinement the gluon is not a physical state, none of physical
observables/processes in low-energy QCD will be directly affected by such a
temporary violation of color gauge invriance/symmetry. In order to make the
existence of a mass gap perfectly clear the corresponding subtraction procedure
is introduced. All this llows one to etablish the general structure of the full
gluon propagator in the presence of a mass gap. It is mainly generated by the
nonlinear interaction of massless gluon modes. The physical meaning of the mass
gap is to be responsible for the large-scale (low-energy/momentum), i.e.,
nonperturbative structure of the true QCD vacuum. The direct nonlinear
iteration solution of the transcendental equation for the full gluon propagator
in the presence of a mass gap is present. We formulate a generl method how to
restore the transversality of the full gluon propagator relevant for the
nonperturbative QCD. It is explicitly shown that such a solution confines QCD.
The exact and gauge-invariant criterion of gluon confinement is derived. The
gauge-invariant quark confinement criterion is also formulated.


title: f_0(1710) production in exclusive B decays

abstract:
  Production of $f_0(1710)$, a theoretical endeavor of pure scalar glueball
state, is studied in detail from exclusive rare B decay within the framework of
perturbative QCD. The branching fraction for $B^\pm \to K^{*\pm} f_0(1710) \to
K^{*\pm} (K \bar K)$ is estimated to be about $8 \times 10^{-6}$, while for
$B^\pm \to K^\pm f_0(1710) \to K^\pm (K \bar K)$ it is smaller by roughly an
order of magnitude. With the accumulation of almost 1 billion $B \bar B$ pairs
from the B{\tiny A}B{\tiny AR} and Belle experiments to date, hunting for a
scalar glueball via these rare decay modes should be attainable.


title: A T-odd observable sensitive to CP violating phases in squark decay

abstract:
  We present a new observable sensitive to a certain combination of CP
violating phases in supersymmetric extensions of the Standard Model, viz. a
triple product of momenta in the cascade decay of a heavy squark via an
on-shell neutralino and off-shell slepton. We investigate the regions of
parameter space in which the signal is strong enough to be detectable at the
LHC with $\sim \bigl(10^2-10^3\bigr)/\sin^2(2\Delta\phi)$ identified events,
where $\Delta\phi$ is a certain combination of phases in the MSSM presented in
the text.


title: Lectures on Supersymmetry Breaking

abstract:
  We review the subject of spontaneous supersymmetry breaking. First we
consider supersymmetry breaking in a semiclassical theory. We illustrate it
with several examples, demonstrating different phenomena, including metastable
supersymmetry breaking. Then we give a brief review of the dynamics of
supersymmetric gauge theories. Finally, we use this dynamics to present various
mechanisms for dynamical supersymmetry breaking. These notes are based on
lectures given by the authors in 2007, at various schools.


title: Absorption in the final state in reactions and decays in the medium

abstract:
  The role of strong absorption of particles in intermidiate and final states
has been considered. The range of applicability of phenomenological model of
absorption has been studied. This model is nonuniversal. Its applicability
depends on the type of interaction Hamiltonian and matrix element used. We also
demonstrate that the violation of the unitarity condition can produce a
qualitative error in the results. The absorption (decay) in the final state
does not tend to suppress the total process probability as well as the
probability of the channel corresponding to absorption. This is true for the
reactions, decays and $n\bar{n}$ conversion in the medium.


title: Field-theoretical approach to particle oscillations in absorbing matter

abstract:
  The $ab$ oscillations in absorbing matter are considered. The standard model
based on optical potential does not describe the total $ab$ transition
probability as well as the channel corresponding to absorption of the
$b$-particle. We calculate directly the off-diagonal matrix element in the
framework of field-theoretical approach. Contrary to one-particle model, the
final state absorption does not tend to suppress the channels mentioned above
or, similarly, calculation with hermitian Hamiltonian leads to increase the
corresponding values. The model reproduces all the results on the particle
oscillations, however it is oriented to the description of the above-mentioned
channels. Also we touch on the problem of infrared singularities. The approach
under study is infrared-free.


title: Extraction of |Vub| with Reduced Dependence on Shape Functions

abstract:
  Using BaBar measurements of the inclusive electron spectrum in B->X_u e nu
decays and the inclusive photon spectrum in B->X_s gamma decays, we extract the
magnitude of the CKM matrix element Vub. The extraction is based on theoretical
calculations designed to reduce the theoretical uncertainties by exploiting the
assumption that the leading shape functions are the same for all b->q
transitions (q is a light quark). The results agree well with the previous
analysis, have indeed smaller theoretical errors, but are presently limited by
the knowledge of the photon spectrum and the experimental errors on the lepton
spectrum.


title: Modelling Bose Einstein Correlations via Elementary Emitting Cells

abstract:
  We propose a method of numerical modeling Bose Einstein Correlations by using
the notion of Elementary Emitting Cells (EEC). They are intermediary objects
containing identical bosons and are supposed to be produced independently
during the hadronization process. Only bosons in EEC, which represents a single
quantum state here, are subjected to the effects of Bose-Einstein (BE)
statistics, which forces them to follow a geometrical distribution. There are
no such effects between particles from different EECs. We illustrate our
proposition by calculating a representative number of typical distributions and
discussing their sensitivity to EECs and their characteristics.


title: Tau Physics 2006: Summary & Outlook

abstract:
  A large amount of new results have been presented at TAU2006. The highlights
of the workshop, the present status of a few selected topics on lepton physics
(universality, QCD tests, V_{us} determination from tau decay, g-2, neutrino
oscillations, lepton-flavour violation) and the prospects for future
improvements are briefly summarized.


title: Baryonic mass formula in large $N_c$ QCD versus quark model

abstract:
  We establish a connection between the quark model results and the $1/N_c$
expansion mass formula used in the description of baryon resonances. We show
that a remarkable compatibility exists between the two methods.


title:
Bounding the Number of Light Neutrinos Species in a Left-Right Symmetric
  Model

abstract:
  Using the experimental values for the rates $R^{LEP}
_{exp}=\Gamma_{inv}/\Gamma_{l\bar l}=5.942\pm 0.016$,
$R^{Giga-Z_1}=\Gamma_{inv}/\Gamma_{l\bar l}=5.942\pm 0.012$ (most conservative)
and $R^{Giga-Z_1}=\Gamma_{inv}/\Gamma_{l\bar l}=5.942\pm 0.006$ (most
optimistic) we derive constraints on the number of neutrinos light species
$(N_\nu)_{LRSM}$ with the invisible width method in the framework of a
left-right symmetric model (LRSM) as a function of the LR mixing angle $\phi$.
Using the LEP result for $N_\nu$ we may place a bound on this angle,
$-1.6\times 10^{-3}\leq\phi \leq 1.1\times 10^{-3}$, which is stronger than
those obtained in previous studies of the LRSM.


title: Parton distribution function for quarks in an s-channel approach

abstract:
  We use an s-channel picture of hard hadronic collisions to investigate the
parton distribution function for quarks at small momentum fraction x, which
corresponds to very high energy scattering. We study the renormalized quark
distribution at one loop in this approach.
  In the high-energy picture, the quark distribution function is expressed in
terms of a Wilson-line correlator that represents the cross section for a color
dipole to scatter from the proton. We model this Wilson-line correlator in a
saturation model. We relate this representation of the quark distribution
function to the corresponding representation of the structure function
F_T(x,Q^2) for deeply inelastic scattering.


title: Signatures of Spherical Compactification at the LHC

abstract:
  TeV-scale extra dimensions may play an important role in electroweak or
supersymmetry breaking. We examine the phenomenology of such dimensions,
compactified on a sphere $S^n$, $n \geq 2$, and show that they possess distinct
features and signatures. For example, unlike flat toroidal manifolds, spheres
do not trivially allow fermion massless modes. Acceptable phenomenology then
generically leads to "non-universal" extra dimensions with "pole-localized"
4-$d$ fermions; the bosonic fields can be in the bulk. Due to spherical
symmetry, some Kaluza-Klein (KK) modes of bulk gauge fields are either stable
or extremely long-lived, depending on the graviton KK spectrum. Using precision
electroweak data, we constrain the lightest gauge field KK modes to lie above
$\simeq 4$ TeV. We show that some of these KK resonances are within the reach
of the LHC in several different production channels. The models we study can be
uniquely identified by their collider signatures.


title: Extraction of alpha_s from radiative Upsilon(1S) decays

abstract:
  We improve on a recent determination of alpha_s from Gamma(Upsilon(1S)-->X
gamma)/Gamma(Upsilon(1S)-->X) with CLEO data by taking into account color octet
contributions and avoiding any model dependence in the extraction. We obtain
alpha_s(M_Upsilon(1S))= 0.184+0.015-0.014, which corresponds to
alpha_s(M_Z)=0.119+0.006-0.005.


title: The ArDM project: a Liquid Argon TPC for Dark Matter Detection

abstract:
  WIMPs (Weakly Interacting Massive Particles) are considered the main
candidates for Cold Dark Matter. The ArDM experiment aims at measuring signals
directly induced by WIMPs in liquid argon. A 1-ton prototype is currently
developed with the goal of demonstrating the feasibility and performance of a
detector with such a large target mass. ArDM aims at acting as a liquid argon
TPC and additionally measuring the scintillation light. The principle of the
experiment and the conceptual design of the detector are described.


title:
Bilepton effects on the WWV^* vertex in the 331 model with right-handed
  neutrinos via a SU_L(2)XU_Y(1) covariant quantization scheme

abstract:
  In a recent paper, we investigated the effects of the massive charged gauge
bosons (bileptons) predicted by the minimal 331 model on the off-shell vertex
WWV^* (V=gamma, Z) using a SU_L(2) X U_Y(1) covariant gauge-fixing term for the
bileptons. We proceed along the same lines and calculate the effects of the
gauge bosons predicted by the 331 model with right-handed neutrinos. It is
found that the bilepton effects on the WWV^* vertex are of the same order of
magnitude than those arising from the SM and several of its extensions,
provided that the bilepton mass is of the order of a few hundred of GeVs. For
heavier bileptons, their effects on the WWV^* vertex are negligible. The
behavior of the form factors at high energies is also discussed as it is a
reflect of the gauge invariance and gauge independence of the WWV^* Green
function obtained via our quantization method.


title:
Landau Potential Study of the Chiral Phase Transition in a QCD-Like
  Theory

abstract:
  We investigate the chiral phase transition of a QCD-like theory, based the
shape change of the effective potential near the critical point. The potential
is constructed with the auxiliary field method, and a source term coupled to
the field is introduced in order to compute the potential shape numerically. We
also generalize the potential so as to have two independent order parameters,
the quark scalar density and the number density. We find a tri-critical point
locating at (T,mu)=(97, 203) MeV, and visualize it as the merging point of
three potential minima.


title: Exploring the polarization of gluons in the nucleon

abstract:
  We give an overview of the current status of investigations of the
polarization of gluons in the nucleon. We describe some of the physics of the
spin-dependent gluon parton distribution and its phenomenology in high-energy
polarized hadronic scattering. We also review the recent experimental results.


title: Spectral index and its running with deviation from the "slow-roll"

abstract:
  Evaluating the mode function at horizon crossing, we obtained an incorrect
expression for the spectral index for a rapidly decaying mode. See the recent
paper astro-ph/0701432 for details.


title: Exclusive processes $e^+e^-\to VP$ in $k_T$ factorization

abstract:
  The exclusive processes $e^+e^-\to VP$, in the region of which the final
state meson momentum is much larger than the hadronic scale $\Lambda_{QCD}$,
are studied in the framework of PQCD approach based on the $k_T$ factorization.
Including the transverse momentum distribution in the light cone wave
functions, our results are consistent with the experimental measurements.
According to our results, many processes have large enough cross sections to be
detected at $\sqrt s=10.58$ GeV. The $s$ dependence of the cross section has
been directly studied and our result indicates that the $1/s^3$ scaling is more
favored than $1/s^4$. We also find that the gluonic contribution for the
processes involving $\eta^{(')}$ is tiny.


title: Entropy & viscosity bound of strange stars

abstract:
  At finite temperature (T) there is a link with general relativity and
hydrodynamics that leads to a lower bound for the ratio of shear viscosity and
entropy density (\eta/s). We find that the bound is saturated in the simple
model for quark matter that we use for strange stars at T = 80 MeV, at the
surface of a strange star. At this T we have the possibility of cosmic
separation of phases. We find that, although strongly correlated, the quark
matter at the surface of strange stars constitute the most perfect interacting
fluid permitted by nature. At the centre of the star, however, the density is
higher and conditions are more like the results found for perturbative QCD.


title: Geometric Scaling and QCD Dynamics in DIS

abstract:
  DIS data from HERA show a striking regularity as \sigma^{\gamma^* p} is a
function of the ratio \tau=Q^2/Q_s^2(x) only. The scaling function shows a
break at \tau ~ 1, which has been taken as an indication for saturation.
However, besides saturation also the transition between dominance of
k_t-ordered (DGLAP) and k_t-non-ordered (BFKL) evolution contributes to a break
around this value of \tau, as well as the suppression for small Q^2 due to
finite quark masses and confinement. In this paper we use a dipole cascade
model based on Mueller's dipole model, which also includes energy conservation
and pomeron mergins, to investigate the contributions of these different
effects to the scaling behaviour. As a result we predict that the scaling
function for \tau < 1 will be modified when data for Q^2 > 1 GeV^2 become
available. We also investigate the scaling properties of the charm contribution
and the impact parameter dependence of the saturation scale.


title: Spin Observables for Polarizing Antiprotons

abstract:
  The PAX project at GSI Darmstadt plans to polarize an antiproton beam by
repeated interaction with a hydrogen target in a storage ring. Many of the beam
particles are required to remain within the ring after interaction with the
target, so small scattering angles are important. Hence we concentrate on low
momentum transfer (small t), a region where electromagnetic effects dominate
the hadronic effects. A colliding beam of polarized electrons with energy
sufficient to provide scattering of antiprotons beyond ring acceptance may
polarize an antiproton beam by spin filtering. Expressions for spin observables
are provided and are used to estimate the rate of buildup of polarization of an
antiproton beam.


title: Flavor effects in thermal leptogenesis

abstract:
  We review recent developments in leptogenesis on flavor effects. Their
account discloses an important connection between the matter-antimatter
asymmetry of the Universe and CP violation at low energies. Besides, they
modify the upper bound on the neutrino masses holding in the unflavored case.
In this respect, it is important to identify the exact condition for flavor
effects to be relevant and for the `fully flavored' Boltzmann equations to be
valid.


title: Nonlinear optical properties of the magnetized QED Vacuum

abstract:
  New processes associated with the nonlinear optical properties of the
electromagnetic vacuum, as predicted by quantum electrodynamics are described.
We consider the presence of a static and a rotating magnetic field. The cases
of harmonic generation and two different types of sideband cascades are
considered. First order and second order effects with respect to the external
magnetic field are discussed in detail. Possible experimental configurations
using ultra-intense lasers are compared with the alternative use of cw lasers
in stable optical cavities.


title: Axion Excitation by Intense Laser Fields

abstract:
  Parametric excitation of axions by two beating electromagnetic fields is
considered here. This can be used as a new concept for active experiments using
the existing ultra-intense laser systems. Comparison is made of this active
experimental concept with the present day passive experiments using static
magnetic fields.


title: Divergent IR gluon propagator from Ward-Slavnov-Taylor identities?

abstract:
  We exploit the Ward-Slavnov-Taylor identity relating the 3-gluons to the
ghost-gluon vertices to conclude either that the ghost dressing function is
finite and non vanishing at zero momentum while the gluon propagator diverges
(although it may do so weakly enough not to be in contradiction with current
lattice data) or that the 3-gluons vertex is non-regular when one momentum goes
to zero. We stress that those results should be kept in mind when one studies
the Infrared properties of the ghost and gluon propagators, for example by
means of Dyson-Schwinger equations.


title: The radiative decay of the $\Lambda(1405)$ and its two-pole structure

abstract:
  We evaluate theoretically the radiative decay widths into $\gamma\Lambda$ and
$\gamma\Sigma^0$ of the two poles of the $\Lambda(1405)$ found in chiral
unitary theories and we find quite different results for each of the two poles.
We show that, depending on which reaction is used to measure the
$\Lambda(1405)$ radiative decays, one gives more weight to one or the other
pole, resulting in quite different shapes in the $\gamma\Lambda(\Sigma^0)$
invariant mass distributions. Our results for the high-energy pole agree with
those of the empirical determination of the $\gamma\Lambda$ and
$\gamma\Sigma^0$ radiative widths (based on an isobar model fitting of the
$K^-p$ atom data), which are sometimes referred to as ``experimental data''. We
have made a detailed study of the $K^-p\to\pi^0\gamma\Lambda(\Sigma^0)$ and
$\pi^-p\to K^0\gamma\Lambda(\Sigma^0)$ reactions and have shown that they,
indeed, lead to different shapes for the $\gamma\Lambda(\Sigma^0)$ invariant
mass distributions.


title: Neutrino structure functions in the QCD dipole picture

abstract:
  In this contribution we present an exploratory QCD analysis of the neutrino
structure functions in charged current DIS using the color dipole formalism.
The corresponding dipole cross sections are taken from recent phenomenological
and theoretical studies in deep inelastic inclusive production, including
nuclear shadowing corrections. The theoretical predictions are compared to the
available experimental results in the small-x region.


title:
Kaon-Baryon Couplings and the Goldberger-Treiman Relation in SU(3) x
  SU(3)

abstract:
  The coupling constants G_(K N Lambda) and G_(K N Sigma) are obtained from the
Goldberger-Treiman relation in the strange channel with chiral symmetry
breaking taken into account. The results, G_(K N Lambda)=-12.3+-1.2 and G_(K N
Sigma)=5.5+-.5 come close to the SU(3) values.


title: Note on proton-antiproton suppression in 200 AGeV Au-Au collisions

abstract:
  We discuss the measured nuclear suppression of p + pbar production in 200
AGeV Au-Au collisions at RHIC within radiative energy loss. For the AKK set of
fragmentation functions, proton production is dominated by gluons, giving rise
to the expectation that the nuclear suppression for p + pbar should be stronger
than for pions due to the stronger coupling of gluons to the quenching medium.
Using a hydrodynamical description for the soft matter evolution, we show that
this is indeed seen in the calculation. However, the expected suppression
factors for pions and protons are sufficiently similar that a discrimination
with present data is not possible. In the high p_T region above 6 GeV where the
contributions of hydrodynamics and recombination to hadron production are
negligible, the model calculation is in good agreement with the data on p +
pbar suppression.


title: CP Violation, Stability and Unitarity of the Two Higgs Doublet Model

abstract:
  The Two-Higgs-Doublet Model is considered, in its CP-non-conserving version.
It is shown quantitatively how vacuum stability and tree-level unitarity in the
Higgs-Higgs-scattering sector constrain the parameter space of the model. In
particular, at high values of tanbeta, the model violates unitarity, unless
some of the Higgs bosons are heavy. In the regime of large CP violation in the
neutral-Higgs-t-quark sector, which requires tanbeta lsim 1, the Yukawa
coupling parameter space (determined by the neutral-Higgs-sector rotation
matrix) is reasonably unconstrained. On the other hand, the corresponding
neutral-Higgs-b-quark sector allows for large CP violation at tanbeta gg 1.
However, here the model is more constrained: Significant CP violation is
correlated with a considerable splitting among the two heavier Higgs bosons.


title: Neutral minima in two-Higgs doublet models

abstract:
  We study the neutral minima of two-Higgs doublet models, showing that these
potentials can have at least two such minima with different depths. We analyse
the phenomenology of these minima for the several types of two-Higgs doublet
potentials, where CP is explicitly broken, spontaneously broken or preserved.
We discover that it is possible to have a neutral minimum in these potentials
where the masses of the known particles have their standard values, with
another deeper minimum where those same particles acquire different masses.


title:
Electron-positron pair production by linearly polarized photon in the
  nuclear field

abstract:
  Process of lepton pair production by polarized photon on nuclei can be used
to measure the degree of linear polarization of high energy photon. The
differential cross section and the analyzing power are calculated with taking
into account higher powers of expansion on $Z\alpha$. Pure Coulomb and screened
potential are considered.


title: Twist-3 Distribution Amplitudes of K* and phi Mesons

abstract:
  We present a systematic study of twist-3 light-cone distribution amplitudes
of $K^*$ and $\phi$ mesons in QCD. The structure of SU(3)-breaking corrections
is studied in detail. Non-perturbative input parameters are estimated from QCD
sum rules. As a by-product, we update the parameters describing the twist-3
distribution amplitudes of the $\rho$ meson. We also review and update
predictions for the twist-2 distribution amplitudes of $\rho$, $K^*$ and
$\phi$.


title:
EMC effect and jet energy loss in relativistic deuteron-nucleus
  collisions

abstract:
  We investigate the influence of modified nuclear parton distribution
functions (PDFs) on high-pT hadron production at RHIC and LHC energies using a
pQCD-improved parton model. For application at RHIC, we focus on the possible
contribution of the EMC modification of the nuclear PDFs in the x > 0.3 region
to the observed suppression of pi0 production at pT > 10 GeV/c in dAu
collisions. We study three different parameterizations of the nuclear PDF
modifications and find that they give consistent results for R_dAu(pT) for
neutral pions in the region 10 GeV/c < pT < 20 GeV/c. We find that the EMC
suppression of the parton distributions in the Au nucleus does not strongly
influence the R_dAu for pi0 in the pT region where the suppression is observed.
Using the HKN parameterization, we evaluate systematic errors in the
theoretical R_dAu(pT) resulting from uncertainties in the nuclear PDFs. The
measured nuclear modification factor is inconsistent with the pQCD model result
for pT > 10 GeV/c even when the systematic uncertainties in the nuclear PDFs
are accounted for. The inclusion of a small final-state energy loss can reduce
the discrepancy with the data, but we cannot perfectly reproduce the pT
dependence of the measured R_dAu(pT). For the LHC, we find that shadowing of
the nuclear PDFs produces a large suppression in the yield of hadrons with pT <
100 GeV/c in p(d)A collisions.


title: Three-particle azimuthal correlations and Mach shocks

abstract:
  Measurements of angular correlations of hadrons with a (semi-)hard trigger
hadron in heavy-ion collisions at RHIC show large angular structures opposite
to the trigger which were a priori unexpected. These away side large angle
correlations were first observed in two-particle correlations and have recently
also been investigated in three-particle correlation measurements by the PHENIX
and STAR collaborations. We show that the correlation signal can be understood
in terms of sonic shockwaves ('Mach cones') excited by hard partons
supersonically traversing the medium. The propagation of such shocks through
the medium evolution is treated in a Monte Carlo (MC) framework. We demonstrate
that two- and especially three-particle correlations offer non-trivial insight
into the medium-averaged speed of sound and the evolution of flow. Our findings
imply that the assumption of "deflected jets" is not necessary to account for
the observed correlations.


title: Heavy Quark Masses from Sum Rules in Four-Loop Approximation

abstract:
  New data for the total cross section $\sigma(e^+e^-\to{hadrons})$ in the
charm and bottom threshold region are combined with an improved theoretical
analysis, which includes recent four-loop calculations, to determine the short
distance $\bar{\rm MS}$ charm and bottom quark masses. A detailed discussion of
the theoretical and experimental uncertainties is presented. The final result
for the $\bar{\rm MS}$-masses, $m_c(3 {GeV})=0.986(13)$ GeV and $m_b(10
{GeV})=3.609(25)$ GeV, can be translated into $m_c(m_c)=1.286(13)$ GeV and
$m_b(m_b)=4.164(25)$ GeV. This analysis is consistent with but significantly
more precise than a similar previous study.


title: Implications of the LEP Higgs Bounds for the MSSM Stop Sector

abstract:
  The implications of the LEP Higgs bounds on the MSSM stop masses and mixing
are compared in two different regions of the Higgs parameter space. The first
region is the Higgs decoupling limit, in which the bound on the mass of the
lighter Higgs is $m_h \ge 114.4$ GeV, and the second region is near a
non-decoupling limit with $m_h \simeq 93$ GeV, in which the masses of all the
physical Higgs bosons are required to be light. Additional constraints from the
electroweak $S$- and $T$-parameter and the decays $B \to X_s \gamma$ and $B_s
\to \mu^+ \mu^-$, which also constrain the Higgs and/or stop sector, are
considered. In some regions of the MSSM parameter space these additional
constraints are stronger than the LEP Higgs bounds. Implications for the tuning
of electroweak symmetry breaking are also discussed.


title: NRQCD and Quarkonia

abstract:
  We review recent progress in Non-Relativistic QCD and in related
Non-Relativistic Effective Field Theories with emphasis on the applications to
heavy quarkonia.


title: Diffractive Excitation of Heavy Flavors: Leading Twist Mechanisms

abstract:
  Diffractive production of heavy flavors is calculated within the light-cone
dipole approach. Novel leading twist mechanisms are proposed, which involve
both short and long transverse distances inside the incoming hadron.
Nevertheless, the diffractive cross section turns out to be sensitive to the
primordial transverse momenta of projectile gluons, rather than to the hadronic
size. Our calculations agree with the available data for diffractive production
of charm and beauty, and with the observed weak variation of the
diffraction-to-inclusive cross section ratios as function of the hard scale.


title: CP violation in Semi-Leptonic $\tau$ decays

abstract:
  We study CP violation in semi-leptonic $\tau$ decays and we determine the
conditions necessary to be able to define a observable CP asymmetry. We apply
these conditions in both models, the standard model for the electroweak
interactions and its supersymmetric extensions. In the first case, the leading
order contribution to the direct CP asymmetry in $\tau^{\pm} \to K^{\pm}\pi^0
\nu_{\tau}$ decay rates is evaluated. In the second case,we compute the SUSY
effective hamiltonian that describes the $|\Delta S|=1$ semileptonic decays of
tau leptons. We show that SUSY contributions may enhance the CP asymmetry of
$\tau \to K \pi \nu_{\tau}$ decays by several orders of magnitude compared to
the standard model expectations.


title: Comments on the "Reply" presented in hep-ph/0701058v1

abstract:
  Comments are presented on the analyses of $\pi\pi$/$K\pi$ scattering and
production processes in relation with the combined fit and Adler zero
concerning the hep-ph/0701058v1.


title:
Physics Beyond the Standard Model and Cosmological Connections: A
  Summary from LCWS 06

abstract:
  The International Linear Collider (ILC) is likely to provide us important
insights into the sector of physics that may supersede our current paradigm
viz., the Standard Model. In anticipation of the possibility that the ILC may
come up in the middle of the next decade, several groups are vigourously
investigating its potential to explore this new sector of physics. The Linear
Collider Workshop in Bangalore (LCWS06) had several presentations of such
studies which looked at supersymmetry, extra dimensions and other exotic
possibilities which the ILC may help us discover or understand. Some papers
also looked at the understanding of cosmology that may emerge from studies at
the ILC. This paper summarises these presentations.


title:
$B^0 \to \omega\eta^{(\prime)}$ and $\phi\eta^{(\prime)}$ decays in the
  perturbative QCD approach

abstract:
  We calculate the branching ratios and CP-violating asymmetries for $B^0
\to\omega \eta $, $\omega \eta^\prime$, $\phi \eta$ and $\phi \eta^\prime$
decays in the perturbative QCD (pQCD) factorization approach. The pQCD
predictions for the CP-averaged branching ratios are $Br(B^0 \to \omega\eta) =
\left (2.7 ^{+1.1}_{-1.0})\times 10^{-7}$,
  $Br(B^0 \to \omega \eta^\prime) = \left (0.75 ^{+0.37}_{-0.33}) \times
10^{-7}$, and
  $Br(B^0 \to \phi\eta) = \left (6.3 ^{+3.3}_{-1.9}) \times 10^{-9}$,
  $Br(B^0 \to \phi\eta^{\prime}) = \left (7.3^{+3.5}_{-2.6}) \times 10^{-9}$
which are consistent with currently available experimental upper limits. The
inclusion of the gluonic contribution can change the branching ratios of $B \to
\omega(\phi) \eta^\prime$ decays by about 10%. The direct CP-violating
asymmetries for $B^0 \to \omega \eta$ and $\omega \eta^\prime$ decays are
generally large in size.


title:
Effective field theory approach to light propagation in an external
  magnetic field

abstract:
  The recent PVLAS experiment observed the rotation of polarization and the
ellipticity when a linearly polarized laser beam passes through a transverse
magnetic field. The phenomenon cannot be explained in the conventional QED. We
attempt to accommodate the result by employing an effective theory for the
electromagnetic field alone. No new particles with a mass of order the laser
frequency or below are assumed. To quartic terms in the field strength, a
parity-violating term appears besides the two ordinary terms. The rotation of
polarization and ellipticity are computed for parity asymmetric and symmetric
experimental set-ups. While rotation occurs in an ideal asymmetric case and has
the same magnitude as the ellipticity, it disappears in a symmetric set-up like
PVLAS. This would mean that we have to appeal to some low-mass new particles
with nontrivial interactions with photons to understand the PVLAS result.


title:
Probing the parameter space for an MSSM inflation and the neutralino
  dark matter

abstract:
  The flat directions LLe and udd within the minimal supersymmetric Standard
Model provide all the necessary ingredients for a successful inflation with the
right amplitude of the scalar density perturbations, negligible gravity waves
and the spectral tilt within 2\sigma observed range 0.92 \leq n_s \leq 1.0. In
this paper we explore the available parameter space for inflation in
conjunction with a thermal cold dark matter abundance within the minimal
supergravity model. Remarkably for the inflaton, which is a combination of
squarks and sleptons, there is a stau-neutralino coannihilation region below
the inflaton mass 500 GeV for the observed density perturbations and the tilt
of the spectrum. For such a low mass of the inflaton the LHC is capable of
discovering the inflaton candidates within a short period of its operation.
Inflation is also compatible with the focus point region which opens up for the
inflaton masses above TeV. We show that embedding MSSM within SO(10) can
naturally favor this region.


title: Phase transition in a supersymmetric axion model

abstract:
  In a supersymmetric axion model where the scale for both supersymmetry
breaking and Peccei-Quinn symmetry breaking is around $10^{11}$ GeV, we find
that there is a reasonable parameter space for a strongly first order phase
transition at the scale.


title:
Higgs Boson Properties in the Standard Model and its Supersymmetric
  Extensions

abstract:
  We review the realization of the Brout-Englert-Higgs mechanism in the
electroweak theory and describe the experimental and theoretical constraints on
the mass of the single Higgs boson expected in the minimal Standard Model. We
also discuss the couplings of this Higgs boson and its possible decay modes as
functions of its unknown mass. We then review the structure of the Higgs sector
in the minimal supersymmetric extension of the Standard Model (MSSM), noting
the importance of loop corrections to the masses of its five physical Higgs
bosons. Finally, we discuss some non-minimal models.