title: Dark Energy: Recent Developments

abstract:
  A six parameter cosmological model, involving a vacuum energy density that is
extremely tiny compared to fundamental particle physics scales, describes a
large body of increasingly accurate astronomical data. In a first part of this
brief review we summarize the current situation, emphasizing recent progress.
An almost infinitesimal vacuum energy is only the simplest candidate for a
cosmologically significant nearly homogeneous exotic energy density with
negative pressure, generically called Dark Energy. If general relativity is
assumed to be also valid on cosmological scales, the existence of such a dark
energy component that dominates the recent universe is now almost inevitable.
We shall discuss in a second part the alternative possibility that general
relativity has to be modified on distances comparable to the Hubble scale. It
will turn out that observational data are restricting theoretical speculations
more and more. Moreover, some of the recent proposals have serious defects on a
fundamental level (ghosts, acausalities, superluminal fluctuations).


title: Next to Leading Logarithms and the PHOTOS Monte Carlo

abstract:
  With the approaching start-up of the experiments at LHC, the urgency to
quantify systematic uncertainties of the generators, used in the interpretation
of the data, is becoming pressing. The PHOTOS Monte Carlo program is often used
for the simulationof experimental, selection-sensitive, QED radiative
corrections in decays of Z bosons and other heavy resonances and particles.
Thanks to its complete phase-space coverage it is possible, with no
approximations for any decay channel, to implement the matrix-element. The
present paper will be devoted to those parts of the next-to-leading order
corrections for Z decays which are normally missing in PHOTOS. The analytical
form of the exact and truncated (standard) kernel used in PHOTOS will be
explicitly given. The correction, being the ratio of the exact to the
approximate kernel, can be activated as an optional contribution to the
internal weight of PHOTOS.
  To calculate the weight, the information on the effective Born-level Z/gamma*
couplings and even directions of the incoming beams, is needed. A universal
implementation would have made the PHOTOS solution less modular and less
convenient for the users. That is why, for the time being, we will keep the
correcting weight as an extra option, available for special tests only.
  We will quantify the numerical effect of the approximation with the help of a
multitude of distributions. The numerical size of the effect is in general
below 0.1%; however, in some corners of the phase-space (well defined and
contributing less than 0.5% to the total rate), it may reach up to about 20% of
their relative size.


title:
Two-loop QCD corrections to semileptonic b-quark decays near maximum
  recoil

abstract:
  Two-gluon radiative corrections to the $b\to c\ell\nu$ decay width have been
computed analytically as an expansion in terms of \frac{m_c}{m_b} << 1 in the
kinematical limit of zero lepton invariant mass. The obtained results match
smoothly with a previously known expansion around (1 - \frac{m_c}{m_b} << 1.
Together they describe the process $b\to c\ell\nu$ for all mass ratios
\frac{m_c}{m_b}.


title:
Four-loop moments of the heavy quark vacuum polarization function in
  perturbative QCD

abstract:
  New results at four-loop order in perturbative QCD for the first two Taylor
coefficients of the heavy quark vacuum polarization function are presented.
They can be used to perform a precise determination of the charm- and
bottom-quark mass. Implications for the value of the quark masses are briefly
discussed.


title:
D-term Contributions to the Mixed Modulus-Anomaly Mediated Supersymmetry
  Breaking

abstract:
  We investigate effects of D-term contributions to the mixed modulus-anomaly
mediated supersymmetry breaking scenario. In the original scenario, the
tachyonic slepton problem in the pure anomaly mediated supersymmetry breaking
is cured by modulus contributions. We generalize the scenario so as to include
contributions from the D-terms of U(1)_Y and the gauged U(1)_{B-L} which is
motivated in a grand unified theory based on a higher rank gauge group such as
SO(10). As a consequence of additional $D$-term contributions to scalar masses,
we obtain various soft supersymmetry breaking mass spectra, which are different
from those obtained in the conventional mixed modulus-anomaly mediated
supersymmetry breaking. Especially, we find that the lightest superpartner
(LSP) neutralinos can be various types, such as Higgsino-like, wino-like and
bino-like degenerating with the next LSP sfermions.


title: The $\nu$MSM, Inflation, and Dark Matter

abstract:
  We show how to enlarge the $\nu$MSM (the minimal extension of the standard
model by three right-handed neutrinos) to incorporate inflation and provide a
common source for electroweak symmetry breaking and for right-handed neutrino
masses. In addition to inflation, the resulting theory can explain
simultaneously dark matter and the baryon asymmetry of the Universe; it is
consistent with experiments on neutrino oscillations and with all astrophysical
and cosmological constraints on sterile neutrino as a dark matter candidate.
The mass of inflaton can be much smaller than the electroweak scale.


title:
Statistical Model Predictions for Particle Ratios at sqrt(s_NN) = 5.5
  TeV

abstract:
  Particle production in central Pb-Pb collisions at LHC is discussed in the
context of the Statistical Model. Predictions of various particle ratios are
presented with the corresponding choice of model parameters made according to
the systematics extracted from heavy-ion collisions at lower energies. The
sensitivity of several ratios on the temperature and the baryon chemical
potential is studied in detail, and some of them, which are particularly
appropriate to determine the chemical freeze-out point experimentally, are
indicated. We show that the anti-p / p ratio is most suitable to determine the
baryon chemical potential while the Omega / K and Omega / pi ratios are best to
determine the temperature at chemical freeze-out.


title:
An Upgraded Version of the Generator BCVEGPY2.0 for Hadronic Production
  of $B_c$ Meson and Its Excited States

abstract:
  An upgraded version of the package [BCVEGPY2.0: Chao-Hsi Chang, Jian-Xiong
Wang and Xing-Gang Wu, Comput. Phys. Commun. {\bf 174} (2006) 241-251] is
presented, which works under LINUX system and is named as BCVEGPY2.1. Using
this version with a GNU C compiler, users may simulate the $B_c$-events in
various experimental environments very conveniently. It has been rearranged for
better modularity and code reusability (less dependency among various modules)
than BCVEGPY2.0 has. Furthermore, in the upgraded version a special and
convenient executable-file {\bf run} as default is available according to one's
wish, i.e., the file is obtained in the way that the GNU command {\bf make}
compiles the codes requested by precise purpose with the help of a master {\bf
makefile} in the main code directory. Finally, this paper may also be
considered as an erratum of the original BCVEGPY2.0, i.e., here the errors
(typo mainly) in BCVEGPY2.0 have been corrected.


title:
Transverse $\Lambda^0$ polarization in inclusive quasi-real
  photoproduction: quark scattering model

abstract:
  The transverse polarization of $\Lambda^0$ hyperons produced in the inclusive
$ep$ reaction at the 27.6 GeV beam energy is assumed to appear mostly via
scattering of the strange quark in a color field. Results of application of
such an idea to the preliminary data of HERMES are presented. Contributions of
$\Sigma^0$, $\Xi$, and $\Sigma^*$ resonances to the polarization are taken into
account.


title:
A simple method to simulate W/Z + jet production at hadron collisions
  with PS-ME matching

abstract:
  We propose a simple method to simulate $W/Z$ + jet productions at hadron
collisions. The simulation can be done by using existing tools with some
modifications allowed to users. $W/Z$ + 1 jet events are generated using an
ME-based event generator at the tree level. The divergence at low $p_{T}$ is
suppressed by using the Sudakov form factor. PS is added with an appropriate
consideration for PS-ME matching. The simulation for the $W$ + 1 jet production
shows a smooth matching with the $W$ + 0 jet simulation at low $p_{T}$s. The
$Z$ + 1 jet simulation in the Tevatron Run I condition well reproduces the
experimental measurement on the $p_{T}$ spectrum of $Z$.


title:
From Multiparton to Single parton scatterings: The path towards the
  Revival of the Transverse Spin

abstract:
  I give a brief historical account on the way I have been conducted to revive
the concept of the transverse spin from previous studies on multiparton
scatterings.


title:
Is Chemical Equilibrium achieved in Collisions of Small Systems at the
  SPS?

abstract:
  The Statistical Model has to be formulated in the canonical ensemble with
respect to strangeness conservation if the number of strange particles becomes
small. However, the canonical suppression under the assumption of strangeness
chemical equilibrium in the whole fireball volume was found to be not
sufficient to reproduce observed yields. Two approaches have been proposed to
modify the model. First, a non-equilibrium factor was introduced in canonical
and grand-canonical ensembles as the additional fit parameter to account for
the suppressed strange particle phase-space. Here we focus on the second
method: The model is extended by correlation volumes which restrict the
strangeness chemical equilibrium only to certain subvolumes of the system.


title: Higher $\eta_c(nS)$ and $\eta_b (nS)$ mesons

abstract:
  The hyperfine splittings in heavy quarkonia are studied in a
model-independent way using the experimental data on di-electron widths.
Relativistic correlations are taken into account together with the smearing of
the spin-spin interaction. The radius of smearing is fixed by the known
$J/\psi-\eta_c(1S)$ and $\psi(2S)-\eta'_c(2S)$ splittings and appears to be
small, $r_{ss} \cong 0.06$ fm. Nevertheless, even with such a small radius an
essential suppression of the hyperfine splittings ($\sim 50%)$ is observed in
bottomonium. For the $nS~ b\bar b$ states $(n=1,2,...,6)$ we predict the values
(in MeV) 28, 12, 10, 6, 6, and 3, respectively. For the $3S$ and $4S$
charmonium states the splittings 16(2) MeV and 12(4) MeV are obtained.


title:
Remarks to the Standard Theory of Neutrino Oscillations. Alternative
  Scheme of Neutrino Oscillations

abstract:
  In the standard theory of neutrino oscillations it is supposed that physical
observed neutrino states $\nu_{e}, \nu_{\mu}, \nu_{\tau}$ have no definite
masses, that they are initially produced as a mixture of the $\nu_{1}, \nu_{2},
\nu_{3}$ neutrino states (are produced as a wave packet), and that neutrino
oscillations are the real ones. Then this wave packet must decompose at a
definite distance into constituent parts and neutrino oscillations must
disappear. It was shown that these suppositions lead to violation of the law of
energy and momentum conservation. An alternative scheme of neutrino
oscillations obtained within the framework of particle physics has been
considered where the above mentioned shortcomings are absent, the oscillations
of neutrinos with equal masses are the real ones, and the oscillations of
neutrinos with different masses are virtual ones. Expressions for probabilities
of neutrino transitions (oscillations) in the alternative (corrected) scheme,
are given.


title:
Supergravity Modification of D-term Hybrid Inflation: Solving the Cosmic
  String and Spectral Index Problems via a Right-Handed Sneutrino

abstract:
  Supergravity corrections due to the energy density of a right-handed
sneutrino can generate a negative mass squared for the inflaton, flattening the
inflaton potential and reducing the spectral index and inflaton energy density.
For the case of D-term hybrid inflation, we show that the spectral index can be
lowered from the conventional value n = 0.98 to a value within the range
allowed by the latest WMAP analysis, n = 0.951^{+0.015}_{-0.019}. The modified
energy density is consistent with non-observation of cosmic strings in the CMB
if n < 0.946. The WMAP lower bound on the spectral index implies that the
D-term cosmic string contribution may be very close present CMB limits,
contributing at least 5% to the CMB multipoles.


title:
Proton/pion ratios and radial flow in pp and peripheral heavy ion
  collisions

abstract:
  The production of baryon and mesons in the RHIC heavy-ion experiments has
received a lot of attention lately. Although not widely known, the pp data
measured concurrently with heavy ion collisions do not find a convincing
explanation in terms of simple models. We present the results of an afterburner
to Pythia and Hijing event generators, simulating radial flow which seems to
qualitatively explain the experimental results when applied to the pp collision
data from RHIC at 200 GeV center-of-mass energy.


title:
The exact quantization of the CLEO and BELLE data for $D$ mass
  differences by the harmonic quarks and oscillators

abstract:
  The harmonic quarks and their complete oscillators are successfully used for
the exact quantitative results and an explanation of the $D$ meson mass
differences. For the first time it is shown that the mass differences of the
charmed mesons with the same flavors are strictly quantized by the rest masses
of harmonic quarks in both "free" state and complete oscillator state. The
$D^*(2007)^0$ $\to$ $D^0$ transition has the following neutral quark group:
$d$-oscillator + $u^0$-quark with rest energy 142.124 MeV. It is argued that it
is the unique model solution within the 4$\sigma$ experimental interval. The
$D_s^{*+}$ - $D_s^+$ mass difference is quantized by the simplest quark
reaction with the difference energy 143.756 MeV. The energy of the
$D_{sJ}$(2460)$^+$ $\to$ $D_s^+$ transition explains by the decay of the one
complete $s$-oscillator with the energy 491.33 MeV. The full agreement with
experimental data of CLEO and BELLE is obtained. The problems of a quark shells
and the quantization by quark rest masses are discussed.


title: Code for prompt numerical computation of the leading order GPD evolution

abstract:
  This paper describes the design and work of a set of computer routines
capable for numerical computation of generalized parton distributions (GPDs)
evolution at the leading order. The main intention of this work is to present a
fast-working computer code making possible fitting of GPDs parameters to the
data on hard electron-nucleon scattering.


title: Probing New Physics through B Mixing: Status, Benchmarks and Prospects

abstract:
  As is well known, $B^0_{d,s}$--$\bar B^0_{d,s}$ mixing offers a profound
probe into the effects of physics beyond the Standard Model. The data obtained
at the $e^+e^-$ $B$ factories have already provided valuable insights into the
$B_d$-meson system, and very recently also the $B^0_s$--$\bar B^0_s$
oscillation frequency $\Delta M_s$ has been measured at the Tevatron. We give a
critical discussion of the interpretation of these data in terms of
model-independent new-physics parameters. We address in particular the impact
of the uncertainties of the relevant input parameters, set benchmarks for their
accuracies as required by future precision measurements at the LHC, and explore
the prospects for new CP-violating effects in the $B_s$ system. To complement
our model-independent analysis, we also discuss the constraints imposed by the
CDF measurement of $\Delta M_s$ on popular models of new physics, namely
scenarios with an extra $Z'$ boson and supersymmetry. We find that the new data
still leave sizeable room for new-physics contributions to $B^0_{s}$--$\bar
B^0_{s}$ mixing, which could be detected at the LHC.


title: Defect Junctions and Domain Wall Dynamics

abstract:
  We study a number of domain wall forming models where various types of defect
junctions can exist. These illustrate some of the mechanisms that will
determine the evolution of defect networks with junctions. Understanding these
mechanisms is vital for a proper assessment of a number of cosmological
scenarios: we will focus on the issue of whether or not cosmological frustrated
domain wall networks can exist at all, but our results are also relevant for
the dynamics of cosmic (super)strings, where junctions are expected to be
ubiquitous. We also define and discuss the properties that would make up the
ideal model in terms of hypothetical frustrated wall networks, and provide an
explicit construction for such a model. We carry out a number of numerical
simulations of the evolution of these networks, analyze and contrast their
results, and discuss their implications for our no-frustration conjecture.


title:
Big Bang Nucleosynthesis Constraints on Hadronically and
  Electromagnetically Decaying Relic Neutral Particles

abstract:
  Big Bang nucleosynthesis in the presence of decaying relic neutral particles
is examined in detail. All non-thermal processes important for the
determination of light-element abundance yields of 2H, 3H, 3He, 4He, 6Li, and
7Li are coupled to the thermonuclear fusion reactions to obtain comparatively
accurate results. Predicted light-element yields are compared to
observationally inferred limits on primordial light-element abundances to infer
constraints on the abundances and properties of relic decaying particles with
decay times in the interval 0.01 sec < tau < 10^(12) sec. Decaying particles
are typically constrained at early times by 4He or 2H, at intermediate times by
6Li, and at large times by the 3He/2H ratio. Constraints are shown for a large
number of hadronic branching ratios and decaying particle masses and may be
applied to constrain the evolution of the early Universe.


title: Chromo-polarizability and pipi final state interaction

abstract:
  The chromo-polarizability of a quarkonium state is a measure of the amplitude
of the $E1$-$E1$ chromo-electric interaction of the quarkonium with soft gluon
fields and can be measured in the heavy quarkonium decays. Based on the chiral
unitary approach, formulas with modification caused by the $S$ wave $\pi\pi$
final state interaction (FSI) for measuring the chromo-polarizabilities are
given. It is shown that the effect of the $S$ wave $\pi\pi$ FSI is very
important in extracting chromo-polarizabilities from the experimental data. The
resultant values with the FSI are reduced to about 1/3 of those determined
without the FSI. The consequences of the FSI correction in the $J/\psi$-nucleon
scattering near the threshold are also discussed. The estimated lower bound of
the total cross section is reduced from about 17 mb to 2.9 mb, which agrees
with the experimental data point and is compatible with the previously
estimated values in the literature. In order to understand the interaction of
heavy quarkonia with light hadrons at low energies better and to obtain the
chromo-polarizabilities of quarkonia accurately, more data should be
accumulated. This can be done in the $J/\psi \to \pi^+\pi^-l^+l^-$ decay at
BES-III and CLEO-c and in the $\Upsilon \to \pi^+\pi^-l^+l^-$ decay at B
factories.


title:
Collider and Dark Matter Searches in Models with Mixed Modulus-Anomaly
  Mediated SUSY Breaking

abstract:
  We investigate the phenomenology of supersymmetric models where moduli fields
and the Weyl anomaly make comparable contributions to SUSY breaking effects in
the observable sector of fields. This mixed modulus-anomaly mediated
supersymmetry breaking (MM-AMSB) scenario is inspired by models of string
compactification with fluxes, which have been shown to yield a de Sitter vacuum
(as in the recent construction by Kachru {\it et al}). The phenomenology
depends on the so-called modular weights which, in turn, depend on the location
of various fields in the extra dimensions. We find that the model with zero
modular weights gives mass spectra characterized by very light top squarks
and/or tau sleptons, or where M_1\sim -M_2 so that the bino and wino are
approximately degenerate. The top squark mass can be in the range required by
successful electroweak baryogenesis. The measured relic density of cold dark
matter can be obtained via top squark co-annihilation at low \tan\beta, tau
slepton co-annihilation at large \tan\beta or via bino-wino coannihilation.
Then, we typically find low rates for direct and indirect detection of
neutralino dark matter. However, essentially all the WMAP-allowed parameter
space can be probed by experiments at the CERN LHC, while significant portions
may also be explored at an e^+e^- collider with \sqrt{s}=0.5--1 TeV. We also
investigate a case with non-zero modular weights. In this case,
co-annihilation, A-funnel annihilation and bulk annihilation of neutralinos are
all allowed. Results for future colliders are qualitatively similar, but
prospects for indirect dark matter searches via gamma rays and anti-particles
are somewhat better.


title: B Physics on the Lattice: Present and Future

abstract:
  Recent experimental measurements and lattice QCD calculations are now
reaching the precision (and accuracy) needed to over-constrain the CKM
parameters $\bar\rho$ and $\bar\eta$. In this brief review, I discuss the
current status of lattice QCD calculations needed to connect the experimental
measurements of $B$ meson properties to quark flavor-changing parameters.
Special attention is given to $B\to\pi\ell\nu$, which is becoming a competitive
way to determine $|V_{ub}|$, and to $B^0-\bar{B^0}$ mixings, which now include
reliable extrapolation to the physical light quark mass. The combination of the
recent measurement of the $B_s$ mass difference and current lattice
calculations dramatically reduces the uncertainty in $|V_{td}|$. I present an
outlook for reducing dominant lattice QCD uncertainties entering CKM fits, and
I remark on lattice calculations for other decay channels.


title: Falsifying Models of New Physics Via WW Scattering

abstract:
  We show that the coefficients of operators in the electroweak chiral
Lagrangian can be bounded if the underlying theory obeys the usual assumptions
of Lorentz invariance, analyticity, unitarity and crossing to arbitrarily short
distances. Violations of these bounds can be explained by either the existence
of new physics below the naive cut-off of the the effective theory, or by the
breakdown of one of these assumptions in the short distance theory. As a
corollary, if no light resonances are found, then a measured violation of the
bound would falsify generic models of string theory.


title: Mixed Gauge and Anomaly Mediation From New Physics at 10 TeV

abstract:
  In the context of anomaly-mediated supersymmetry breaking, it is natural for
vectorlike fields and singlets to have supersymmetry breaking masses of order
10 TeV, and therefore act as messengers of supersymmetry breaking. We show that
this can give rise to phenomenologically viable spectra compatible with
perturbative gauge coupling unification. The minimal model interpolates
continuously between pure anomaly mediation and gauge mediation with a
messenger scale of order 10 TeV. It is also possible to have non-minimal models
with more degenerate specta, with some squarks lighter than sleptons. These
models reduce to the MSSM at low energies and incorporate a natural solution of
the mu problem. The minimal model has four continuous parameters and one
discrete parameter (the number of messengers). The LEP Higgs mass bound can be
satisfied in the minimal model by tuning parameters at the GUT scale to one
part in 50.


title: Azimuthal Correlations in p-p collisions

abstract:
  We report the analysis of experimental azimuthal correlations measured by
STAR in p-p collisions at $\sqrt{s_{NN}}$ = 200 GeV. We conclude that for a fit
of data using Pythia event generator we need to include two values of $k_{T}$.


title: Generation of harmonics by a focused laser beam in vacuum

abstract:
  Generation of odd harmonics by a super strong focused laser beam in vacuum is
considered. The process occurs due to the plural light-by-light scattering
effect. In the leading order of perturbation theory, generation of $(2k+1)$th
harmonic is described by a loop diagram with $(2k+2)$ external incoming, and
two outgoing legs. A frequency of the beam is assumed to be much smaller than
the Compton frequency, so that the approximation of a constant uniform
electromagnetic field is valid locally. Analytical expressions for angular
distribution of generated photons, as well as for their total emission rate are
obtained in the leading order of perturbation theory. Influence of higher-order
diagrams is studied numerically using the formalism of Intense Field QED. It is
shown that the process may become observable for the beam intensity of the
order of $10^{27}\rm{W/cm}^2$.


title: (Reverse) Engineering Vacuum Alignment

abstract:
  In the presence of spontaneous symmetry breaking, the alignment of the vacuum
with respect to the gauge group is often controlled by quadratically divergent
operators in the low energy non-linear sigma model. In principle the magnitudes
and signs of these operators can be changed by making different assumptions
about the ultraviolet physics, but in practice all known ways of regulating
these theories preserve the naive vacuum alignment. We show that by
"integrating in" different sets of heavy spin-one fields, it is possible to UV
extend certain non-linear sigma models into two distinct UV insensitive
theories. These UV extensions have identical low energy degrees of freedom but
different radiative potentials, making it possible to engineer two different
vacuum alignments for the original non-linear sigma model. Our construction
employs "non-square" theory spaces which generically violate the common lore
that the preferred vacuum alignment preserves the maximal gauge symmetry. By UV
extending the SO(9)/(SO(4) X SO(5)) little Higgs model, we find a radiative
potential that deviates from the naive expectation but does not stabilize the
correct vacuum for proper electroweak symmetry breaking.


title: Fate of the inert three-flavor, spin-zero color-superconducting phases

abstract:
  I investigate some of the inert phases in three-flavor, spin-zero
color-superconducting quark matter: the CFL phase (the analogue of the B phase
in superfluid $^3\rm He$), the A and A* phases, and the 2SC and sSC phases. I
compute the pressure of these phases with and without the neutrality condition.
It is shown that the 2SC phase is identical to the A* phase up to a color
rotation. The CFL phase is the energetically favored phase except for a small
region of intermediate densities where the 2SC/A* phase is favored.


title: Echoes of a Hidden Valley at Hadron Colliders

abstract:
  We consider examples of ``hidden-valley'' models, in which a new confining
gauge group is added to the standard model. Such models often arise in string
constructions, and elsewhere. The resulting (electrically-neutral) bound states
can have low masses and long lifetimes, and could be observed at the LHC and
Tevatron. Production multiplicities are often large. Final states with heavy
flavor are common; lepton pairs, displaced vertices and/or missing energy are
possible. Accounting for LEP constraints, we find LHC production cross-sections
typically in the 1-100 fb range, though they can be larger. It is possible the
Higgs boson could be discovered at the Tevatron through rare decays to the new
particles.


title: Hadron Optics: Diffraction Patterns in Deeply Virtual Compton Scattering

abstract:
  We show that the Fourier transform of the Deeply Virtual Compton Scattering
(DVCS) amplitude with respect to the skewness variable $\zeta$ at fixed
invariant momentum transfer squared $t$ provides a unique way to visualize the
structure of the target hadron in the boost-invariant longitudinal coordinate
space. The results are analogous to the diffractive scattering of a wave in
optics. As a specific example, we utilize the quantum fluctuations of a fermion
state at one loop in QED to obtain the behavior of the DVCS amplitude for
electron-photon scattering. We then simulate the wavefunctions for a hadron by
differentiating the above LFWFs with respect to $M^2$ and study the
corresponding DVCS amplitudes in light-front longitudinal space. In both cases
we observe that the diffractive patterns in the longitudinal variable conjugate
to $\zeta$ sharpen and the positions of the first minima move in with
increasing momentum transfer. For fixed $t$, higher minima appear at positions
which are integral multiples of the lowest minimum. Both these observations
strongly support the analogy with diffraction in optics.


title:
Simulations of Cold Electroweak Baryogenesis: Dependence on Higgs mass
  and strength of CP-violation

abstract:
  Cold electroweak baryogenesis was proposed as a scenario to bypass generic
problems of electroweak baryogenesis within the Standard Model. In this
scenario, baryogenesis takes place during an electroweak symmetry breaking
transition, which is also responsible for preheating after inflation. In the
simplest modelling of the scenario, only two parameters remain undetermined:
The Higgs mass and the strength of CP violation. Using full real-time lattice
simulations, we compute the dependence of the asymmetry on these parameters.


title:
A Monte Carlo Generator for Full Simulation of e+e- to hadrons Cross
  section Scan Experiment

abstract:
  A generator with $\alpha^2$ order radiative correction effects, including
both the initial state radiative corrections and the photon vacuum polarization
corrections, is built for the full simulation of $e^+e^- \to hadrons $ in cross
section scan experiment in the quarkonium energy region. The contributions from
the hadron production structures including the resonances of $1^{--}$
quarkonium families and the light hadrons spectrum below 2 GeV as well as the
QED continuum hadron spectrum are all taken into account in the event
generation. It was employed successfully to determine the detection efficiency
for selection of the events of $e^+e^-\to hadrons$ from the data taken in the
energy region from 3.650 GeV to 3.872 GeV covering both the $\psi(3686)$ and
$\psi(3770)$ resonances in BES experiment. The generator reproduces the
properties of hadronic event production and inclusive decays well.


title: The discrete flavor symmetry D5

abstract:
  We consider the standard model (SM) extended by the flavor symmetry D5 and
search for a minimal model leading to viable phenomenology. We find that it
contains four Higgs fields apart from the three generations of fermions whose
left- and left-handed conjugate parts do not transform in the same way under
D5. We provide two numerical fits for the case of Dirac and Majorana neutrinos
to show the viability of our low energy model. The fits can accommodate all
data with the neutrinos being normally ordered. For Majorana neutrinos two of
the right-handed neutrinos are degenerate. Concerning the Higgs sector we find
that all potentials constructed with three SM-like Higgs doublets transforming
as 1+2 under D5 have a further unwanted global U(1) symmetry. Therefore we
consider the case of four Higgs fields forming two D5 doublets and show that
this potential leads to viable solutions in general, however it does not allow
spontaneous CP-violation (SCPV) for an arbitrary vacuum expectation value (VEV)
configuration. Finally, we discuss extensions of our model to grand unified
theories (GUTs) as well as embeddings of D5 into the continuous flavor
symmetries SO(3)_f and SU(3)_f.


title: Exclusive electroproduction and the quark structure of the nucleon

abstract:
  The natural interpretation of deep inelastic scattering is in terms of hard
scattering on QCD constituents of the target. We examine the relation between
amplitudes measured in exclusive lepto-production and the quark content of the
nucleon. We show that in the Bjorken limit, the natural interpretation of
amplitudes measured in these hard exclusive processes is in terms of the quark
content of the meson cloud and not the target itself. Therefore the most
efficient representation of these exclusive processes is in terms of leading
Regge amplitudes.


title: Infrared Freezing of Euclidean QCD observables

abstract:
  We consider the leading one-chain term in a skeleton expansion for QCD
observables and show that for energies Q^2>\Lambda^2, where Q^2=\Lambda^2 is
the Landau pole in the coupling, the skeleton expansion result is equivalent to
the standard Borel integral representation, with ambiguities related to
infrared (IR) renormalons. For Q^2<\Lambda^2 the skeleton expansion result is
equivalent to a previously proposed modified Borel representation where the
ambiguities are connected with ultraviolet (UV) renormalons. We investigate the
Q^2-dependence of the perturbative corrections to the Adler D function, the GLS
sum rule, and the polarized and unpolarized Bjorken sum rules. In all these
cases the one-chain result changes sign in the vicinity of Q^2=\Lambda^2, and
then exhibits freezing behaviour, vanishing at Q^2=0. Finiteness at
Q^2=\Lambda^2 implies specific relations between the residues of IR and UV
renormalons in the Borel plane. These relations, only one of which has
previously been noted (though it remained unexplained) are shown to follow from
the continuity of the characteristic function in the skeleton expansion. By
considering the compensation of non-perturbative and perturbative ambiguities
we are led to a result for the Q^2 dependence of these observables at all Q^2,
in which there is a single undetermined non-perturbative parameter, and which
involves the skeleton expansion characteristic function. The observables freeze
to zero in the infrared. We briefly consider the freezing behaviour of the
Minkowskian R_{e+e-} ratio.


title: Evidence of finite sQGP formation time at RHIC

abstract:
  We demonstrate that the existence of a finite formation time of strongly
interacting plasma in nuclear collisions at RHIC is an inavitable conclusion
from recent experimental data. The most striking feature of the experimental
data - an absense of absorption of high transverse momentum pions in the
rection plane direction for mid-peripheral collisions - points to the presence
of a surface zone with no absorption and strong suppression in the inner core.
A natural interpretation of such a zone should be the plasma formation time T=
2-3 fm/c. We discuss constraints induced by finite formation time on some
physical observables at RHIC. Nuclear modification factor, azimuthal assymetry,
di-jet correlations can quantitatively be described by particle production in
the early stage of the nuclear collision. A possible impact on azimuthal
anisotropy at lower hardon momenta, on interpretation of the non-photonic
electrons and J/psi data is also considered.


title: Medium Modifications of Vector Mesons and NA60

abstract:
  We confront different models for medium modifications of the electromagnetic
correlation function to recent dimuon spectra from the NA60 collaboration for
central In-In collisions at the CERN-SPS. In the low-mass region (M \lesssim
1.0 GeV), we evaluate medium modifications of the spectral properties of \rho-,
\omega- and \phi-mesons. In the intermediate-mass region (M>1.0 GeV), we employ
schematic models for the mixing of vector and axialvector current correlators,
which provide a mechanism for chiral-symmetry restoration.


title: Grand unified models and cosmology

abstract:
  The cosmological consequences of particle physics grand unified theories
(GUTs) are studied. Cosmological models are implemented in realistic particle
physics models. Models consistent from both particle physics and cosmological
considerations are selected. (...)


title: Possible S-wave Bound-States of Two Pseudoscalar Mesons

abstract:
  Using the potentials derived from vector-meson-exchanges, the $K\bar K$,
$DK$, $B\bar K$, $D\bar D$, $B\bar B$, $BD$, $\bar D K$, $BK$ and $B\bar D$
systems are studied. Possible S-wave bound-states of two pseudoscalar mesons
are discussed. We find that systems of $DB$, $D\bar D$, $B\bar B$ and $DK$ with
isospin 0 are likely to form S-wave bound states via strong interactions while
the others are unlikely to be bound by the strong interaction sector alone.
With the Coulomb potential, the $K^+K^-$ system can form an atomic bound state
- the kaonium. The influence of the one-meson-exchange potential on the ground
state energy of the kaonium and its decay widths to $\pi\pi$ and $\pi\eta$ are
evaluated.


title: Cosmology of B-L cosmic strings

abstract:
  ${\rm B - L}$ cosmic strings form in a wide class of theories beyond the
Standard Model which contain a ${\rm U}(1)_{{\rm B - L}}$ gauge symmetry. They
can form at the end of hybrid inflation and explain, together with inflation,
the Cosmic Microwave Background anisotropies and the formation of large scale
structure. They can produce Cold Dark Matter in the form of the Lightest
SuperParticle and they can be at the origin of the baryon asymmetry of our
universe. One major advantage of these mechanisms is that they are non-thermal.


title: Pseudo-observables in Axial gauge

abstract:
  We have given a first application of the Axial gauge a` la Dams and Kleiss to
the Standard Model (SM) physics at the LHC. We have focused on the issue of
providing a well-behaved signal definition in presence of potentially strong
gauge cancellations at high energies. As a first illustration, we have analysed
the production of WZ vector-boson pairs, which gives rise to four final-state
fermions. Purely leptonic final states, pp->lvll, have been numerically
investigated in the region of high center-of-mass energies and large scattering
angles, particularly sensitive to gauge dependences. We have found that the
Axial gauge is the appropriate framework to recover a meaningful separation of
signal and irreducible background over the full energy domain.


title: Unification of standard and exotic matter through a $Z_2$ symmetry

abstract:
  We consider a scenario in which the discrete weak symmetry between quarks and
leptons is extended to the weak force by introducing exotic partners. We
conjecture that there exists a hidden discrete symmetry $\tilde{P}$, defining a
$Z_2$ group, between standard and exotic quarks and leptons. The unified model
$SU(3)_{q} \times SU(3)_{\tilde{q}} \times SU(2)_{q \tilde{\ell}} \times
SU(2)_{\tilde{q} \ell} \times U(1)_{Y} \times \tilde{P}$ is discussed, where
the unifying discrete symmetry extends over particles and forces. It is shown
that the lighter neutral and charged weak bosons generated upon spontaneous
symmetry breaking have the same properties as those of the standard model.
Cabbibo-Kobayashi-Maskawa unitarity is used to set a mass of order 2.8 TeV for
the nonstandard weak bosons, which do not exhibit quark-lepton universality. A
grand unified theory of $GUT_{q \tilde{\ell}} \times GUT_{\tilde{q} \ell}
\times \tilde{P}$ type, with decay of exotic matter into standard matter and no
decay of the ordinary nucleon, is put forward.


title: The Zero-Bin and Mode Factorization in Quantum Field Theory

abstract:
  We study a Lagrangian formalism that avoids double counting in effective
field theories where distinct fields are used to describe different infrared
momentum regions for the same particle. The formalism leads to extra
subtractions in certain diagrams and to a new way of thinking about
factorization of modes in quantum field theory. In non-relativistic field
theories, the subtractions remove unphysical pinch singularities in box type
diagrams, and give a derivation of the known pull-up mechanism between soft and
ultrasoft fields which is required by the renormalization group evolution. In a
field theory for energetic particles, the soft-collinear effective theory
(SCET), the subtractions allow the theory to be defined with different infrared
and ultraviolet regulators, remove double counting between soft, ultrasoft, and
collinear modes, and give results which reproduce the infrared divergences of
the full theory. Our analysis shows that convolution divergences in
factorization formul\ae occur due to an overlap of momentum regions. We propose
a method that avoids this double counting, which helps to resolve a long
standing puzzle with singularities in collinear factorization in QCD. The
analysis gives evidence for a factorization in rapidity space in exclusive
decays.


title: Probing the Gravitational Scale via Running Gauge Couplings

abstract:
  According to a recent paper by Robinson and Wilczek, the leading
gravitational corrections to the running of gauge couplings tend to reduce the
values of the couplings at energies below the gravitational scale, defined to
be the energy above which gravity becomes strongly interacting. If the physical
gravitational scale is sufficiently low, as conjectured in certain
extra-dimension models, this behavior of the gauge couplings can be measured in
future high energy experiments, providing a way to determine where the
gravitational scale lies. We estimate that measurements of the fine structure
constant at the Large Hadron Collider and the proposed International Linear
Collider energies can probe the gravitational scale up to several hundred TeV,
which will be the most stringent test that can be obtained in the conceivable
future.


title:
New Physics effects in the flavor-changing neutral couplings of the Top
  quark

abstract:
  We survey the flavor-changing neutral couplings (FCNC) of the top quark
predicted by some extensions of the Standard Model: THDM, SUSY, L-R symmetric,
TC2, 331, and models with extra quarks. Since the expected sensitivity of the
LHC and ILC for the tcV (V=\gamma,g,Z) and tcH couplings is of order of a few
percent, we emphasize the importance of any new physics effect that gives a
prediction for these FCNC couplings within this limit. We also review the
constraints imposed on these couplings from low-energy precision measurements.


title: Grand Unification in the SO(10) Model

abstract:
  Extrapolating the coupling strengths to very high energies, one finds that
they do not converge to a single coupling constant, as expected in the simplest
gauge theory of Grand Unification, the SU(5) theory. We find that the coupling
constants do converge, provided that two new intermediate energy scales are
introduced, the energies where the group SU(4), containing the color group, and
the right-isospin gauge group are spontaneously broken down.


title: The Neutrino Future -- Comments Honoring Gustavo Branco

abstract:
  We briefly report on a study intended to help shape the future of neutrino
physics -- an area to which Professor Gustavo Branco has made distinguished
contributions.


title:
Fermion masses and mixings in SO(10) models and the neutrino challenge
  to supersymmetric grand unified theories

abstract:
  We present a detailed study of the quark and lepton mass spectra in a SO(10)
framework with one 10_H and one \bar{126}_H Higgs representations in the Yukawa
sector. We consider in full generality the interplay between type-I and type-II
seesaws for neutrino masses. We first perform a \chi^2 fit of fermion masses
independent on the detailed structure of the GUT Higgs potential and determine
the regions in the parameter space that are preferred by the fermion mass sum
rules. We then apply our study to the case of the minimal renormalizable SUSY
SO(10) GUT with one 10_H, one \bar{126}_H, one 126_H, and one 210_H Higgs
representations. By requiring that proton decay bounds are fulfilled we
identify a very limited area in the parameter space where all fermion data are
consistently reproduced. We find that in all cases gauge coupling unification
in the supersymmetric scenario is severely affected by the presence of lighter
than GUT (albeit B-L conserving) states. We then conclusively show that the
minimal supersymmetric SO(10) scenario here considered is not consistent with
data. The fit of neutrino masses with type-I and type-II seesaws within a
renormalizable SO(10) framework strongly suggests a non-SUSY scenario for gauge
unification.


title:
Leptogenesis bound on neutrino masses in left-right symmetric models
  with spontaneous D-parity violation

abstract:
  We study the baryogenesis via leptogenesis in a class of left-right symmetric
models, in which $D$-parity is broken spontaneously. We first discuss the
consequence of the spontaneous $D$-parity breaking on the neutrino masses. Than
we study the lepton asymmetry in various cases, from the decay of right handed
neutrino as well as the triplet Higgs, depending on their relative masses they
acquire from the symmetry breaking pattern. The leptogenesis bound on their
masses are discussed by taking into account the low energy neutrino oscillation
data. It is shown that a TeV scale leptogenesis is viable if there are
additional sources of CP violation like domain wall originating from the
spontaneous $D$-parity violation.


title:
A higher dimensional explanation of the excess of Higgs-like events at
  CERN LEP

abstract:
  Searches for the SM Higgs boson by the four LEP experiments have found a 2.3
sigma excess at 98 GeV and a smaller 1.7 sigma at around 115 GeV. We interpret
these excesses as evidence for a Higgs boson coupled to a higher dimensional
singlet scalar. The fit implies a relatively low dimensional mixing scale
mu_{lhd} < 50 GeV, which explains the low confidence level found for the
background fit in the range s^{1/2} > 100 GeV. The data show a slight
preference for a five-dimensional over a six-dimensional field. This Higgs
boson cannot be seen at the LHC, but can be studied at the ILC.


title:
NNLL QCD Contribution of the Electromagnetic Dipole Operator to
  Gamma(anti-B -> X(s) gamma)

abstract:
  We present an independent calculation of that part of the O(\alpha_s^2)
contribution to the decay width \Gamma(\bar B -> X_s \gamma) which arises from
the self-interference term of the electromagnetic dipole operator O_7. Using a
different method, we find complete agreement with a previous calculation. This
NNLL contribution is an important ingredient for the complete NNLL prediction
of \Gamma(\bar B -> X_s \gamma) which will resolve the charm quark mass
ambiguity appearing at NLL accuracy.


title: Is the 2-Flavor Chiral Transition of First Order?

abstract:
  We study the effects of the interaction between the Chiral condensate and the
Polyakov loop on the chiral transition within an effective Lagrangian. We find
that the effects of the interaction change the order of the phase transition
when the explicit breaking of the Z_N symmetry of the Polyakov loop is large.
Our results suggest that the chiral transition in 2-flavor QCD may be first
order.


title:
QCD threshold corrections to Higgs decay and to hadroproduction in
  $l^+l^-$ annihilation

abstract:
  We present threshold enhanced QCD corrections to the bottom quark energy
distribution in Higgs boson decay and to hadroproduction in $l^+l^-$
annihilation beyond leading order in the strong coupling constant. This is
achieved using the resummed decay distribution obtained using renormalisation
group invariance and the mass factorisation theorem that they satisfy and
Sudakov resummation of soft gluons.


title: Hints of large tan(beta) in flavour physics

abstract:
  Motivated by the first evidence of the B -> tau nu transition reported by
Belle and by the precise DeltaM_{B_s} measurement by CDF, we analyse these and
other low-energy observables in the framework of the MSSM at large tan(beta).
We show that for heavy squarks and A terms (M_squarks, A_U > 1 TeV) such
scenario has several interesting virtues. It naturally describes: i) a
suppression of BR(B->tau nu) of (10-40)%, ii) a sizable enhancement of
(g-2)_mu, iii) a heavy SM-like Higgs (m_h ~ 120 GeV), iv) small non-standard
effects in DeltaM_{B_s} and BR(B -> X_s gamma) (in agreement with present
observations). The possibilities to find more convincing evidences of such
scenario, with improved data on BR(B -> tau nu), BR(B -> l+ l-) and other
low-energy observables, are briefly discussed.


title:
Pomeron dominance in deeply virtual Compton scattering and the femto
  holographic image of the proton

abstract:
  The dominance of the soft pomeron in soft high energy scattering and the
evolution to the deeply virtual regime, predicted by perturbation theory, allow
us to reveal generalized parton distributions from H1 and ZEUS measurements of
deeply virtual Compton scattering. These distributions encode a holographic
image of the proton, which will be presented.


title: Holographic Grand Unification

abstract:
  We present a framework for grand unification in which the grand unified
symmetry is broken spontaneously by strong gauge dynamics, and yet the physics
at the unification scale is described by (weakly coupled) effective field
theory. These theories are formulated, through the gauge/gravity
correspondence, in truncated 5D warped spacetime with the UV and IR branes
setting the Planck and unification scales, respectively. In most of these
theories, the Higgs doublets arise as composite states of strong gauge
dynamics, corresponding to degrees of freedom localized to the IR brane, and
the observed hierarchies of quark and lepton masses and mixings are explained
by the wavefunction profiles of these fields in the extra dimension. We present
several realistic models in this framework. We focus on one in which the
doublet-triplet splitting of the Higgs fields is realized within the dynamical
sector by the pseudo-Goldstone mechanism, with the associated global symmetry
corresponding to a bulk gauge symmetry in the 5D theory. Alternatively, the
light Higgs doublets can arise as a result of dynamics on the IR brane, without
being accompanied by their triplet partners. Gauge coupling unification and
proton decay can be studied in these models using higher dimensional effective
field theory. The framework also sets a stage for further studies of, e.g.,
proton decay, fermion masses, and supersymmetry breaking.


title:
Production of the top-pions from the higgsless--top-Higgs model at the
  LHC

abstract:
  The top-pions($\pi_{t}^{0,\pm}$) predicted by extra dimensional descriptions
of the topcolor scenario have similar feature with those in four dimensional
topcolor scenario, which have large Yukawa couplings to the third generation
quarks. In the context of the higgsless--top-Higgs(HTH) model, we discuss the
production of these new particles at the CERN Large Hadron Collider(LHC) via
various suitable mechanisms (gluon-gluon fusion, bottom-bottom fusion,
gluon-bottom fusion, and the usual Drell-Yan processes) and estimate their
production rates. We find that, as long as the top-pions are not too heavy,
they can be abundantly produced at the LHC. The possible signatures of these
new particles might be detected at the LHC experiments.


title: The effect of a late decaying scalar on the neutralino relic density

abstract:
  If the energy density of the Universe before nucleosynthesis is dominated by
a scalar field phi that decays and reheats the plasma to a temperature T_{RH}
smaller than the standard neutralino freeze out temperature, the neutralino
relic density differs from its standard value. In this case, the relic density
depends on two additional parameters: T_{RH}, and the number of neutralinos
produced per phi decay per unit mass of the phi field. In this paper, we
numerically study the neutralino relic density as a function of these reheating
parameters within minimal supersymmetric standard models and show that the dark
matter constraint can almost always be satisfied.


title: New Insights to Old Problems

abstract:
  From the history of the $\theta$-$\tau$ puzzle and the discovery of parity
non-conservation in 1956, we review the current status of discrete symmetry
violations in the weak interaction. Possible origin of these symmetry
violations are discussed.


title: New Critical Point Induced by the Axial Anomaly in Dense QCD

abstract:
  We study the interplay between chiral and diquark condensates within the
framework of the Ginzburg-Landau free energy, and classify possible phase
structures of two and three-flavor massless QCD. The QCD axial anomaly acts as
an external field applied to the chiral condensate in a color superconductor
and leads to a crossover between the broken chiral symmetry and the color
superconducting phase, and, in particular, to a new critical point in the QCD
phase diagram.


title: New Heavy-Light Mesons $Q\bar q$

abstract:
  We succeed in reproducing the $\ell=1$ $B$ mesons, $B_1(5720)$,
$B_2^*(5745)$, and $B_{s2}^*(5839)$ that are recently reported by D0 and CDF,
by using our semirelativistic quark potentila model, which also succeeded in
predicting the mass spectra of the narrow $D_{sJ}$ as well as broad
$D_0^*(0^+)$ and $D_1'(1^+)$ particles a couple of years ago.
  Mass of higher excited states ($\ell=1, 2$) of $B$ and $B_s$ mesons, which
are not yet observed, is also predicted at the first order in $p/m_b$. We find
the corresponding $B_{sJ}$ are below $BK/B^*K$ threshold and should have narrow
decay widths contrary to most other predictions. Also already established
states ($\ell=0$ and $\ell=1$) of $D$, $D_s$, $B$, and $B_s$ heavy mesons are
simultaneously reproduced in good agreement with experimental data within one
percent of accuracy. To calculate these $D/D_s$ and $B/B_s$ heavy mesons we use
different values of strong coupling $\alpha_s$ which conforms to a notion of
running coupling.


title: $S_3$ Symmetry and Tri-bimaximal Mixing

abstract:
  The near maximal value for the atmospheric neutrino mixing angle together
with the fact that the solar mixing angle satisfies the relation
$\sin^2\theta_\odot\simeq {1/3}$ is the basis for the so called tri-bimaximal
mixing (tbm) when $\theta_{13}=0$. In this note, we explore the possibility
that tri-bimaximal mixing is an indication of a softly broken higher leptonic
symmetry $S_3$, the permutation of three lepton families that embeds the
$\mu-\tau$ exchange symmetry of leptons.


title:
Supersymmetric contribution to the CP asymmetry of B-> J/\psi \phi in
  the light of recent B_s -\bar{B}_s measurements

abstract:
  We derive new model independent constraints on the supersymmetric extensions
of the standard model from the new experimental measurements of B_s -\bar{B}_s
mass difference. We point out that supersymmetry can still give a significant
contribution to the CP asymmetry of B_s ->J/\psi \phi that can be measured at
the LHCb experiment. These new constraints on the LL and RR squark mixing
severely restricted their possible contributions to the CP asymmetries of B->
\phi K and B - >\eta' K. Therefore, SUSY models with dominant LR flavor mixing
is the only way to accommodate the apparent deviation of CP asymmetries from
those expected in the standard model. Finally we present an example of SUSY
non-minimal flavor model that can accommodate the new \Delta M_{B_s} results
and also induces significant CP asymmetries in B_s ->J/\psi \phi, B->\phi K and
B ->\eta' K processes.


title: Confinement of light quarks in QCD at finite density

abstract:
  The 4q effective Lagrangian and the gap equation are derived for light quarks
in the confinement phase of QCD. The modification of the confining string due
to finite quark density (chemical quark potential \mu) is observed. As a
surprising result in a multiquark system with a common string junction an
attractive well appears of radius \mu/\sigma and of an average depth equal to
\mu. Possible implications for the density phase transition are discussed.


title: Charm and Bottom Quark Masses from Perturbative QCD

abstract:
  Using a new result for the first moment of the hadronic production cross
section at order ${\cal O}(\alpha_s^3)$, and new data on the $J/\psi$ and
$\psi'$ resonances for the charm quark, we determine the \msb masses of the
charm and bottom quarks to be $\bar{m}_c(\bar{m}_c) = 1.295 \pm 0.015$ GeV and
$\bar{m}_b(\bar{m}_b) = 4.205 \pm 0.058$ GeV. We assume that the continuum
contribution to the sum rules is adequately described by pQCD. While we observe
a large reduction of the perturbative error, the shifts induced by the
theoretical input are very small. The main change in the central value of $m_c$
is related to the experimental data. On the other hand, the value of $m_b$ is
not changed by our calculation to the assumed precision.


title: The MSSM from Scherk-Schwarz Supersymmetry Breaking

abstract:
  We present a five-dimensional model compactified on an interval where
supersymmetry is broken by the Scherk-Schwarz mechanism. The gauge sector
propagates in the bulk, two Higgs hypermultiplets are quasilocalized, and quark
and lepton multiplets localized, in one of the boundaries. The effective
four-dimensional theory is the MSSM with very heavy gauginos, heavy squarks and
light sleptons and Higgsinos. The soft tree-level squared masses of the Higgs
sector can be negative and they can (partially) cancel the positive one-loop
contributions from the gauge sector. Electroweak symmetry breaking can then
comfortably be triggered by two-loop radiative corrections from the top-stop
sector. The fine tuning required to obtain the electroweak scale is found to be
much smaller than in the MSSM, with essentially no fine-tuning for few TeV
gaugino masses. All bounds from direct Higgs searches at LEP and from
electroweak precision observables can be satisfied. The lightest supersymmetric
particle is a (Higgsino-like) neutralino that can accomodate the abundance of
Dark Matter consistently with recent WMAP observations.


title: High Energy Evolution with Pomeron Loops

abstract:
  The high energy/density QCD has been widely used for DIS phenomenology with a
projectile particle considered as perturbative and dilute.
  We review some recent attempts to derive a high energy evolution kernel which
treats targets and projectiles in a symmetric manner. From theoretical point of
view the problem is tightly related to inclusion of Pomeron loops in the
evolution. The ultimate goal is to consider high energy scatterings with both
projectile and target being dense, the situation faced at RHIC and the LHC.


title: Holographic Model at Finite Temperature with $R$-chrage density

abstract:
  We consider a holographic model of QCD at finite temperature with nonzero
chemical potentials conjugate to $R$-charge densities. A critical surface of
the confinement-deconfinement phase transition is shown for five-dimensional
charged black hole solution given by Behrnd, Cveti\v{c} and Sabra. On a special
section of the parameter space, we find an critical curve being similar to the
one expected in QCD. We calculate meson spectra and decay constants in the
confinement phase of this section to see their temperature and chemical
potential dependences. We could assure generalized GellMann-Oakes-Renner
relation and the reduction of pion velocity near the critical point.


title:
Comment on "Dynamical mass generation in strongly coupled quantum
  electrodynamics with weak magnetic fields"

abstract:
  In a recent article, Ayala et al. [Phys. Rev. D 73, 105009 (2006)] have
studied the dynamical generation of masses for fundamental fermions in strongly
coupled QED in the presence of weak magnetic fields. We argue that the results
and conclusions of the article are not reliable as they are subject to gauge
dependent artifacts resulting from an inconsistent truncation of the
Schwinger-Dyson equations.


title: Constraining the Phase of B_s - \bar{B}_s Mixing

abstract:
  New physics contributions to B_s-\bar{B}_s mixing can be parametrized by the
size (r_s^2) and the phase (2\theta_s) of the total mixing amplitude relative
to the Standard Model amplitude. The phase has so far been unconstrained. We
first use the D0 measurement of the semileptonic CP asymmetry A_SL to obtain
the first constraint on the semileptonic CP asymmetry in B_s decays,
A_SL^s=-0.008 \pm 0.011. Then we combine recent measurements by the CDF and D0
collaborations - the mass difference (\Delta M_s), the width difference
(\Delta\Gamma_s) and A_SL^s - to constrain 2\theta_s. The errors on
\Delta\Gamma_s and A_SL^s should still be reduced to have a sensitive probe of
the phase, yet the central values are such that the regions around 2\theta_s ~
3\pi/2 and, in particular, 2\theta_s ~ \pi/2, are disfavored.


title: Stability of winding cosmic wall lattices with X type junctions

abstract:
  This work confirms the stability of a class of domain wall lattice models
that can produce accelerated cosmological expansion, with pressure to density
ratio $w=-1/3$ at early times, and with $w=-2/3$ at late times when the lattice
scale becomes large compared to the wall thickness. For walls of tension
$T_{I}$, the relevant X type junctions could be unstable (for a sufficiently
acute intersection angle $\alpha$) against separation into a pair of Y type
junctions joined by a compound wall, only if the tension $T_{II}$ of the latter
were less than $2T_{I}$ (and for an approximately right-angled intersection if
it were less that $\sqrt{2} T_{I}$) which can not occur in the class considered
here. In an extensive category of multicomponent scalar field models of forced
harmonic (linear or non-linear) type it is shown how the relevant tension --
which is the same as the surface energy density $U$ of the wall -- can be
calculated as the minimum (geodesic) distance between the relevant vacuum
states as measured on the space of field values $\Phi^i$ using a positive
definite (Riemannian) energy metric $dU^2=\tilde G_{ij} d\Phi^i d\Phi^j$ that
is obtained from the usual kinetic metric (which is flat for a model with
ordinary linear kinetic part) by application of a conformal factor proportional
to the relevant potential function $V$. For suitably periodic potential
functions there will be corresponding periodic configurations -- with parallel
walls characterised by incrementation of a winding number -- in which the
condition for stability of large scale bunching modes is shown to be satisfied
automatically. It is suggested that such a configuration -- with a lattice
lengthscale comparable to intergalactic separation distances -- might have been
produced by a late stage of cosmological inflation.


title: Moduli decay in the hot early Universe

abstract:
  We consider moduli fields interacting with thermalized relativistic matter.
We determine the temperature dependence of their damping rate and find it is
dominated by thermal effects in the high temperature regime, i.e. for
temperatures larger than their mass. For a simple scalar model the damping rate
is expressed through the known matter bulk viscosity. The high temperature
damping rate is always smaller than the Hubble rate, so that thermal effects
are not sufficient for solving the cosmological moduli problem.


title:
Laser Irradiated Enhancement of the Atomic Electron Capture Rate in
  search of New Physics

abstract:
  Electron capture processes are important in the search for new physics. In
this context, a high capture rate is desired. We investigate the possibility of
enhancing the electron capture rate by irradiating laser beam to ''atom''. The
possibility of such enhancement can be understood as a consequence of an
enhancement of the electron wave function at the origin, $\Psi (0)$, through an
increased effective mass of the electron. We find that an order of magnitude
enhancement can be realized by using a laser with intensity on the order of
$10^{10}$ W/mm$^2$ and a photon energy on the order of $10^{-3}$ eV.


title:
Quark-lepton complementarity, neutrino and standard model data predict
  $(\theta_{13}^{PMNS}=9^{+1}_{-2})^\circ$

abstract:
  The complementarity between the quark and lepton mixing matrices is shown to
provide a robust prediction for the neutrino mixing angle $\theta_{13}^{PMNS}$.
We obtain this prediction by first showing that the matrix $V_M$, product of
the CKM and PMNS mixing matrices, may have a zero (1,3) entry which is favored
by experimental data. Hence models with bimaximal or tribimaximal forms of the
correlation matrix $V_M$ are quite possible. Any theoretical model with a
vanishing (1,3) entry of $V_M$ that is in agreement with quark data, solar, and
atmospheric mixing angle leads to $\theta_{13}^{PMNS}=(9{^{+1}_{-2}})^\circ$.
This value is consistent with the present 90% CL experimental upper limit.


title: Topical Review on "Beta-beams"

abstract:
  Neutrino physics is traversing an exciting period, after the important
discovery that neutrinos are massive particles, that has implications from
high-energy physics to cosmology. A new method for the production of intense
and pure neutrino beams has been proposed recently: the ``beta-beam''. It
exploits boosted radioactive ions decaying through beta-decay. This novel
concept has been the starting point for a new possible future facility. Its
main goal is to address the crucial issue of the existence of CP violation in
the lepton sector. Here we review the status and the recent developments with
beta-beams. We discuss the original, the medium and high-energy scenarios as
well as mono-chromatic neutrino beams produced through ion electron-capture.
The issue of the degeneracies is mentioned. An overview of low energy
beta-beams is also presented. These beams can be used to perform experiments of
interest for nuclear structure, for the study of fundamental interactions and
for nuclear astrophysics.


title:
HZTool and Rivet: Toolkit and Framework for the Comparison of Simulated
  Final States and Data at Colliders

abstract:
  A common problem in particle physics is the requirement to reproduce
comparisons between data and theory when the theory is a (general purpose)
Monte Carlo simulation and the data are measurements of final state observables
in high energy collisions. The complexity of the experiments, the obervables
and the models all contribute to making this a highly non-trivial task.
  We describe an existing library of Fortran routines, HZTool, which enables,
for each measurement of interest, a comparable prediction to be produced from
any given Monte Carlo generator. The HZTool library is being maintained by
CEDAR, with subroutines for various measurements contributed by a number of
authors within and outside the CEDAR collaboration.
  We also describe the outline design and current status of a replacement for
HZTool, to be called Rivet (Robust Independent Validation of Experiment and
Theory). This will use an object-oriented design, implemented in C++, together
with standard interfaces (such as HepMC and AIDA) to make the new framework
more flexible and extensible than the Fortran HZTool.


title: Gauge invariant MSSM inflaton

abstract:
  We argue that all the necessary ingredients for successful inflation are
present in the flat directions of the Minimally Supersymmetric Standard Model.
We show that out of many gauge invariant combinations of squarks, sleptons and
Higgses, there are two directions, ${\bf LLe}$, and ${\bf udd}$, which are
promising candidates for the inflaton. The model predicts more than $10^3$
e-foldings with an inflationary scale of $H_{\rm inf}\sim {\cal O}(1-10)$ GeV,
provides a tilted spectrum with an amplitude of $\delta_H\sim 10^{-5}$ and a
negligible tensor perturbation. The temperature of the thermalized plasma could
be as low as $T_{rh}\sim {\cal O}(1-10)$~TeV. Parts of the inflaton potential
can be determined independently of cosmology by future particle physics
experiments.


title: A Lorentz-Violating Origin of Neutrino Mass?

abstract:
  We explore implications for neutrino physics of Very Special Relativity
(VSR), wherein the symmetry group of nature includes only a 4-parameter
subgroup of the Lorentz group. VSR can provide a natural origin to
lepton-number conserving neutrino masses without need for sterile
(right-handed) states. Neutrinoless double beta decay is forbidden if VSR is
solely responsible for neutrino masses. For ultra-relativistic neutrinos, such
as are ordinarily studied, VSR and conventional neutrino masses are
indistinguishable. However, we show that VSR effects can be significant near
the beta decay endpoint where neutrinos are not ultra-relativistic.


title: The annihilation decays $B^-_c \to \eta^{'}(\eta ,\pi^0) l^- \bar{\nu}$

abstract:
  We investigate the simileptonic OZI-forbidden annihilation decays $B^-_c \to
\eta^{'}(\eta ,\pi^0) l^- \bar{\nu}$ for $l=\mu,e$ in the perturbative QCD, and
carry out a precise calculation without any approximation for the one-loop
contributions, which involves integrals of 4- and 5-point loop functions. Our
results show that the branching ratios of decays $B^-_c \to \eta^{'} l^-
\bar{\nu}$, $B^-_c \to \eta l^- \bar{\nu}$ and $B^-_c \to \pi^0 l^- \bar{\nu}$,
turn out to be of orders $10^{-4}$, $10^{-5}$ and $10^{-6}$, respectively,
which could be observable in the future experiments at the LHC.


title:
$X(3872)\to J/\psi\pi^+\pi^-$ and $X(3872)\to J/\psi \pi^+\pi^-\pi^0$
  decay widths from QCD sum rules

abstract:
  New spectroscopy from the B factories, the advent of CLEO-c and the BES
upgrade renewed the interest in charmonia. Among the new measurements, the
state X(3872) has received special attention due to its unexpected properties.
Its structure has been studied with different theoretical approaches, most of
them being able to reproduce the measured mass. A further test for the
theoretical descriptions of the X(3872) is to explain its narrow decay width.
In this work we address the decays $X\to J/\psi \pi^+\pi^-\pi^0$ and $X\to
J/\psi \pi^+ \pi^-$, using QCD sum rules with the hypothesis that $X$ is a four
quark state.


title: $B_s$ Mixing and New Physics in hadronic $b \to s \bar{q} q$ transitions

abstract:
  We study the implication of the recent $\Delta m_s$ measurement on $ b \to s
\bar{q} q$ transitions. We show that it is possible, in the presence of a
flavour symmetry, that the phase in $B_s$ mixing may be unobservable even with
new CP odd phases in $b \to s$ transitions. These phases may then produce new
CP odd effects in certain $b \to s \bar{q} q $ transitions like $ B \to K \pi$
but not in others like $ B_d \to \phi K_s$. Working in a two higgs doublet
model of new physics we discuss the allowed NP contribution to $B \to K \pi$
and $ B_d \to \phi K_s$ decays with the new $ Delta m_s$ measurement.


title:
Taylor expansion method to solve Dokshitzer-Gribov-Lipatov-
  Altarelli-Parisi equations in leading and next-to-leading orders at small-x

abstract:
  We present particular and unique solutions of singlet and non-singlet
Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution equations in
leading order (LO) and next-to-leading order (NLO) and gluon, sea and valence
quark Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution equations in
leading order (LO) by applying Taylor expansion method at small-x. We obtain
t-evolutions of deuteron, proton, neutron, difference and ratio of proton and
neutron, gluon, light sea and valence quark structure functions and x-evolution
of deuteron,gluon and light sea quark structure functions at small-x from DGLAP
evolution equations. The results of tevolutions are compared with HERA and NMC
low-x low-Q2 data and x-evolutions are compared with NMC low-x low-Q2 data and
recent global parameterization. And also we compare our results of t-evolution
of proton structure functions with a recent global parameterization.


title:
QCD condensates with flavor SU(3) symmetry breaking from the instanton
  vacuum

abstract:
  We investigate the effects of flavor SU(3)-symmetry breaking on the quark,
gluon, and mixed quark-gluon condensates, based on the nonlocal effective
chiral action from the instanton vacuum. We employ two different
parameterizations for the dependence of the momentum-dependent dynamical quark
mass on the strange current quark mass. With a proper choice of the
current-quark mass dependence of the dynamical quark mass, we show that the
gluon condensate is independent of the current quark mass. We obtain the ratios
of the quark and mixed condensates, respectively: $[<\bar{s}s>/<
\bar{u}u>]^{1/3}=0.75$ and $[<\bar{s}\sigma_{\mu\nu}G^{\mu\nu}s >
<\bar{u}\sigma_{\mu\nu}G^{\mu\nu}u>]^{1/5}=0.87$. It turns out that the
dimensional parameter $m^2_0=<\bar{q} \sigma_{\mu\nu}G^{\mu\nu}q>/ <\bar{q}q>
=1.60\sim 1.92 {\rm GeV}^2$.


title:
The leading non-perturbative coefficient in the weak-coupling expansion
  of hot QCD pressure

abstract:
  Using Numerical Stochastic Perturbation Theory within three-dimensional pure
SU(3) gauge theory, we estimate the last unknown renormalization constant that
is needed for converting the vacuum energy density of this model from lattice
regularization to the MSbar scheme. Making use of a previous non-perturbative
lattice measurement of the plaquette expectation value in three dimensions,
this allows us to approximate the first non-perturbative coefficient that
appears in the weak-coupling expansion of hot QCD pressure.


title: Fractal Nature of Solar Interior

abstract:
  Fractal method has been studied to understand the irregular and chaotic
nature of any physical structure. Conventionally it is suggested that the solar
interior is rigid in nature. Since solar neutrino flux is the indicator of the
interior solar structure it is natural to study the solar neutrino flux source
to find if the nuclear energy generation inside the sun is fractal in nature or
not. At present there exist five solar neutrino experiments to detect neutrinos
from the sun which can suggest which type of nuclear energy generation occurs
inside the sun. Since we know that the solar atmosphere is irregular in nature
many authors have studied this irregular nature by fractal analysis. In this
regard we have studied solar neutrino flux data from 1) Homestake detector
during the period from March, 1970 to April, 1994; 2) SAGE detector during the
period from 1st January, 1990 to 31st December, 2000; 3) SAGE detector during
the period from April, 1998 to December, 2001; 4) GALLEX detector during the
period from May, 1991 to January, 1997; 5) GNO detector during the period from
May, 1998 to December, 2001; 6) GALLEX-GNO detector (combined data) from May,
1991 to December, 2001; 7) average of the data from GNO and SAGE detectors
during the period from May, 1998 to December, 2001; 8) 5-day-long samples from
Super-Kamiokande-I detector during the period from June, 1996 to July,2001; 9)
10-day-long samples from Super-Kamiokande-I detector during the period from
June,1996 to July,2001 and 10) 45-day-long samples from Super-Kamiokande-I
detector during the period from June,1996 to July,2001 by fractal analysis and
we have arrived at the conclusion that the solar neutrino flux data are fractal
in nature.


title: Phenomenological study for the Theta+ and two-meson coupling

abstract:
  We examine several assignments of spin and parity for the pentaquark Theta+
state (J^P=1/2^{+,-}, 3/2^{+,-}) in connection with phenomenology of known
baryon resonances, using a general framework based on the flavor symmetry.
Assuming that the Theta+ belongs to an antidecuplet representation which mixes
with an octet, we calculate the mass spectra of the flavor partners of the
Theta+ based on the SU(3) symmetry. The decay widths of the Theta+ and nucleon
partners are analyzed for the consistency check of the mixing angle obtained
from the masses. It is found that a suitable choice of the mixing angle
successfully reproduces the observed masses of exotics, when their spin and
parity are assigned to be J^P=3/2^-, together with other nonexotic resonances
of J^P=3/2^-. The decay widths of Theta -> KN, N(1520) -> pi N, and N(1700) ->
pi N are also reproduced simultaneously. We then evaluate two-meson couplings
of Theta+, using experimental information of nucleon partners decaying into pi
pi N channels, in which the two pions are in scalar- and vector-type
correlations. We examine two assignments of spin and parity J^P=1/2^+ and
3/2^-, for which the experimental spectra of known resonances with exotic
baryons are properly reproduced by an octet-antidecuplet representation mixing
scheme. Using the obtained coupling constants, total cross sections of the
reactions pi- p -> K- Theta+ and K+ p -> pi+ Theta+ are calculated. Substantial
interference of two terms may occur in the reaction processes for the J^P=1/2^+
case, whereas the interference effect is rather small for the 3/2^- case.


title: The Unstable Glasma

abstract:
  We discuss results from 3+1-D numerical simulations of SU(2) Yang--Mills
equations for an unstable Glasma expanding into the vacuum after a high energy
heavy ion collision. We expand on our earlier work on a non-Abelian Weibel
instability in such a system and study the behavior of the instability in
greater detail on significantly larger lattices than previously. We establish
the time scale for the onset of the instability and demonstrate that the growth
rate is robust as one approaches the continuum limit. For large violations of
boost invariance, non-Abelian effects cause the growth of soft modes to
saturate. At late times, we observe significant creation of longitudinal
pressure and a systematic trend towards isotropy. These time scales however are
significantly larger than those required for early thermalization in heavy ion
collisions. We discuss additional effects in the produced Glasma that may speed
up thermalization.


title: HepForge: A lightweight development environment for HEP software

abstract:
  Setting up the infrastructure to manage a software project can become a task
as significant writing the software itself. A variety of useful open source
tools are available, such as Web-based viewers for version control systems,
"wikis" for collaborative discussions and bug-tracking systems, but their use
in high-energy physics, outside large collaborations, is insubstantial.
Understandably, physicists would rather do physics than configure project
management tools.
  We introduce the CEDAR HepForge system, which provides a lightweight
development environment for HEP software. Services available as part of
HepForge include the above-mentioned tools as well as mailing lists, shell
accounts, archiving of releases and low-maintenance Web space. HepForge also
exists to promote best-practice software development methods and to provide a
central repository for re-usable HEP software and phenomenology codes.


title: A possible symmetry of the $\nu$MSM

abstract:
  To explain the dark matter and the baryon asymmetry of the Universe, the
parameters of the $\nu$MSM (an extension of the Minimal Standard Model by three
singlet neutrinos with masses smaller than the electroweak scale) must be
fine-tuned: one of the masses should be in the ${\cal O} (10)$ keV region to
provide a candidate for the dark-matter particle, while two other masses must
be almost the same to enhance the CP-violating effects in the sterile neutrino
oscillations leading to the baryon asymmetry. We show that a specifically
defined global lepton-number symmetry, broken on the level of ${\cal O}
(10^{-4})$ leads to the required pattern of sterile neutrino masses being
consistent with the data on neutrino oscillations. Moreover, the existence of
this symmetry allows to fix the flavour structure of couplings of singlet
fermions to the particles of the Standard Model and indicates that their masses
are likely to be smaller than ${\cal O} (1)$ GeV, opening a possibility of
their search in decays of charmed, beauty and even $K$ or $\pi$-mesons.


title: HepData and JetWeb: HEP data archiving and model validation

abstract:
  The CEDAR collaboration is extending and combining the JetWeb and HepData
systems to provide a single service for tuning and validating models of
high-energy physics processes. The centrepiece of this activity is the fitting
by JetWeb of observables computed from Monte Carlo event generator events
against their experimentally determined distributions, as stored in HepData.
Caching the results of the JetWeb simulation and comparison stages provides a
single cumulative database of event generator tunings, fitted against a wide
range of experimental quantities. An important feature of this integration is a
family of XML data formats, called HepML.


title: SUSY Les Houches Accord 2 I/O made easy

abstract:
  A library for reading and writing data in the SUSY Les Houches Accord 2
format is presented. The implementation is in native Fortran 77. The data are
contained in a single array conveniently indexed by preprocessor statements.


title: Threshold Resummation in Momentum Space from Effective Field Theory

abstract:
  Methods from soft-collinear effective theory are used to perform the
threshold resummation of Sudakov logarithms for the deep-inelastic structure
function F_2(x,Q^2) in the endpoint region x->1 directly in momentum space. An
explicit all-order formula is derived, which expresses the short-distance
coefficient function C in the convolution F_2=C*phi_q in terms of Wilson
coefficients and anomalous dimensions defined in the effective theory.
Contributions associated with the physical scales Q^2 and Q^2(1-x) are
separated from non-perturbative hadronic physics in a transparent way. A
crucial ingredient to the momentum-space resummation is the exact solution to
the integro-differential evolution equation of the jet function, which is
derived. The methods developed in this Letter can be applied to many other hard
QCD processes.


title: Closing the $SU(3)_L\otimes U(1)_X$ Symmetry at Electroweak Scale

abstract:
  We show that some models with $SU(3)_C\otimes SU(3)_L\otimes U(1)_X$ gauge
symmetry can be realized at the electroweak scale and that this is a
consequence of an approximate global $SU(2)_{L+R}$ symmetry. This symmetry
implies a condition among the vacuum expectation value of one of the neutral
Higgs scalars, the $U(1)_X$'s coupling constant, $g_X$, the sine of the weak
mixing angle $\sin\theta_W$, and the mass of the $W$ boson, $M_W$. In the limit
in which this symmetry is valid it avoids the tree level mixing of the $Z$
boson of the Standard Model with the extra $Z^\prime$ boson. We have verified
that the oblique $T$ parameter is within the allowed range indicating that the
radiative corrections that induce such a mixing at the 1-loop level are small.
We also show that a $SU(3)_{L+R}$ custodial symmetry implies that in some of
the models we have to include sterile (singlets of the 3-3-1 symmetry)
right-handed neutrinos with Majorana masses, being the see-saw mechanism
mandatory to obtain light active neutrinos. Moreover, the approximate
$SU(2)_{L+R}\subset SU(3)_{L+R}$ symmetry implies that the extra non-standard
particles of these 3-3-1 models can be considerably lighter than it had been
thought before so that new physics can be really just around the corner.


title: Upper Bound on the Hadronic Light-by-Light Contribution to the Muon g-2

abstract:
  There are indications that hadronic loops in some electroweak observables are
almost saturated by parton level effects. Taking this as the hypothesis for
this work, we propose a genuine parton level estimate of the hadronic
light-by-light contribution to the anomalous magnetic moment of the muon, a_mu
(LBL,had). Our quark mass definitions and values are motivated in detail, and
the simplicity of our approach allows for a transparent error estimate. For
infinitely heavy quarks our treatment is exact, while for asymptotically small
quark masses a_mu (LBL,had) is overestimated. Interpolating, this suggests
quoting an upper bound. We obtain a_mu (LBL,had) < 1.59 10^-9 (95% CL).


title: Baryon Stopping in Proton-Nucleus Collisions

abstract:
  We calculate the inclusive small-x valence quark production cross section in
proton-nucleus collisions at high energies. The calculation is performed in the
framework of the Color Glass Condensate formalism. We consider both the case
when the valence quark originates inside the nucleus and the case when it
originates inside the proton. We first calculate the cross section in the
quasi-classical approximation resumming the multiple rescatterings with the
nucleus. Then we include the the effects of double logarithmic reggeon
evolution and leading logarithmic gluon evolution in the obtained cross
section. The calculated nuclear modification factor for the stopped baryons
exhibits Cronin enhancement in the quasi-classical approximation and
suppression at high energies/rapidities when quantum evolution corrections are
included, providing a new observable which can be used to test Color Glass
physics.


title: Planck Scale Remnants in Resummed Quantum Gravity

abstract:
  We show that, in a new approach to quantum gravity in which its UV behavior
is tamed by resummation of large IR effects, the final state of the Hawking
radiation for an originally very massive black hole is a Planck scale remnant
which is completely accessible to our universe. This remnant would be expected
to decay into n-body final states, leading to Planck scale cosmic rays.


title: Heavy-quark contribution to the proton's magnetic moment

abstract:
  We study the contribution to the proton's magnetic moment from a heavy quark
sea in quantum chromodynamics. The heavy quark is integrated out perturbatively
to obtain an effective dimension-6 magnetic moment operator composed of three
gluon fields. The leading contribution to the matrix element in the proton
comes from a quadratically divergent term associated with a light-quark tensor
operator. With an approximate knowledge of the proton's tensor charge, we
conclude that a heavy sea-quark contribution to the proton's magnetic moment is
positive in the asymptotic limit. We comment on the implication of this result
for the physical strange quark.


title:
Flavor Changing Higgs Decays in Supersymmetry with Minimal Flavor
  Violation

abstract:
  We study the flavor changing neutral current decays of the MSSM Higgs bosons
into strange and bottom quarks. We focus on a scenario of minimum flavor
violation here, namely only that induced by the CKM matrix. Taking into account
constraint from $b\to s \gamma$, $\delta\rho$ as well as experimental
constraints on the MSSM spectrum, we show that the branching ratio of $(\Phi\to
b\bar{s})$ and $(\Phi \to \bar{b}s)$ combined, for $\Phi$ being either one of
the CP even Higgs states, can reach the order $10^{-4}$-$10^{-3}$ for large
$\tan\beta$, large $\mu$, and large $A_t$. The result illustrates the
significance of minimal flavor violation scenario which can induce competitive
branching fraction for flavor changing Higgs decays. This can be compared with
the previous studies where similar branching fraction has been reported, but
with additional sources of flavor violations in squark mass matrices. We also
discuss some basic features of the flavor violating decays in the generic case.


title: Weak-coupling expansion of the hot QCD pressure

abstract:
  We review recent progress made in determining the pressure of hot QCD up to
the first non-perturbative term in its weak-coupling expansion.


title:
Two knees and the Evasion of Greisen-Zatsepin-Kuz'min Cutoff in Cosmic
  Ray Spectrum -- Are Neutrinos the Tachyons?

abstract:
  The whole spectrum of high-energy cosmic ray (HECR) is, very likely,
influenced by tachyonic neutrinos. Especially, the appearance of two knees can
be fitted by the tachyon mass $m(\nu_e)=m(\nu_\mu)\simeq 0.51$ eV/$c^2$ as
predicted by a minimal three - flavor model for tachyonic neutrino with one
parameter $\delta=0.38$ eV only. Then the evasion of GZK cutoff could be
ascribed to $Z^0(W^\pm)$-burst model together with the same mechanism for knees
as well as a prediction of left-right polarization dependent lifetime
asymmetry. A further conclusive experiment might be whether the protons of HECR
detected on Earth are really right handed polarized?


title:
Large Nc Weinberg-Tomozawa interaction and negative parity s--wave
  baryon resonances

abstract:
  It is shown that in the 70 and 700 SU(6) irreducible spaces, the SU(6)
extension of the Weinberg-Tomozawa (WT) s-wave meson-baryon interaction
incorporating vector mesons ({\it hep-ph/0505233}) scales as ${\cal O}(N_c^0)$,
instead of the well known ${\cal O}(N_c^{-1})$ behavior for its SU(3)
counterpart. However, the WT interaction behaves as order ${\cal O}(N_c^{-1})$
within the 56 and 1134 meson-baryon spaces. Explicit expressions for the WT
couplings (eigenvalues) in the irreducible SU(2$N_F$) spaces, for arbitrary
$N_F$ and $N_c$, are given. This extended interaction is used as a kernel of
the Bethe-Salpeter equation, to study the large $N_c$ scaling of masses and
widths of the lowest--lying negative parity s-wave baryon resonances.
Analytical expressions are found in the $N_c\to \infty$ limit, from which it
can be deduced that resonance widths and excitation energies $(M_R-M)$ behave
as order ${\cal O} (N^0_c)$, in agreement with model independent arguments, and
moreover they fall in the 70-plet, as expected in constituent quark models for
an orbital excitation. For the 56 and 1134 spaces, excitation energies and
widths grow ${\cal O} (N_c^{1/2})$ indicating that such resonances do not
survive in the large $N_c$ limit. The relation of this latter $N_c$ behavior
with the existence of exotic components in these resonances is discussed. The
interaction comes out repulsive in the 700.


title: Finite momentum meson correlation functions in a QCD plasma

abstract:
  The finite momentum meson spectral function (MSF) in the pseudoscalar channel
is evaluated, adopting for the fermionic propagators HTL expressions. The
different contributions to the meson spectral functions are clearly displayed.
Our analysis may be of relevance for lattice studies of MSF based so far on the
Maximum Entropy Method. As a further step the correlation function along the
(imaginary-) temporal direction is evaluated.


title:
CP-Violation in b \to s \ell^{+} \ell^{-} transition Beyond the Standard
  Model

abstract:
  In this study the CP-asymmetry in the b \to s \ell^{+} \ell^{-} transition
was investigated in minimal extension of the Standard Model where C_{9}^{eff}
receives an extra weak phase due to the new physics effects. We observed that
CP-Violation asymmetry can be measurable in the framework of scenario mentioned
above.


title:
Stable TeV - Black Hole Remnants at the LHC: Discovery through Di-Jet
  Suppression, Mono-Jet Emission and a Supersonic Boom in the Quark-Gluon
  Plasma

abstract:
  The production of Large Extra Dimension (LXD) Black Holes (BHs), with a new,
fundamental mass scale of $M_f = 1$ TeV, has been predicted to occur at the
Large Hadron Collider, LHC, with the formidable rate of $10^8$ per year in p-p
collisions at full energy, 14 TeV, and at full luminosity. We show that such
LXD-BH formation will be experimentally observable at the LHC by the complete
disappearance of all very high $p_t$ ($> 500$ GeV) back-to-back correlated
Di-Jets of total mass $M > M_f = 1$ TeV. We suggest to complement this clear
cut-off signal at $M > 2*500$ GeV in the di-jet-correlation function by
detecting the subsequent, Hawking-decay products of the LXD-BHs, namely either
multiple high energy ($> 100$ GeV) SM Mono-Jets (i.e. away-side jet missing),
sprayed off the evaporating BHs isentropically into all directions or the
thermalization of the multiple overlapping Hawking-radiation in a
Heckler-Kapusta-Plasma. Microcanonical quantum statistical calculations of the
Hawking evaporation process for these LXD-BHs show that cold black hole
remnants (BHRs) of Mass $\sim M_f$ remain leftover as the ashes of these
spectacular Di-Jet-suppressed events. Strong Di-Jet suppression is also
expected with Heavy Ion beams at the LHC, due to Quark-Gluon-Plasma induced jet
attenuation at medium to low jet energies, $p_t < 200$ GeV. The (Mono-)Jets in
these events can be used to trigger for Tsunami-emission of secondary
compressed QCD-matter at well defined Mach-angles, both at the trigger side and
at the awayside (missing) jet. The Machshock-angles allow for a direct
measurement of both the equation of state EoS and the speed of sound $c_s$ via
supersonic bang in the "big bang" matter.


title: Molecular Quarkonium

abstract:
  I discuss topics related to four-quark states of the `molecular quarkonium'
type, i.e. resonances that could be considered as (dominantly) made from a
heavy meson and antimeson. Of the so far observed resonances such picture is
very likely applicable to the state X(3872), and I also discuss its possible
relevance to the peak near the $D^* {\bar D}^*$ threshold in $e^+e^-$
annihilation.


title: Plasma Instabilities in an Anisotropically Expanding Geometry

abstract:
  We study (3+1)D kinetic (Boltzmann-Vlasov) equations for relativistic plasma
particles in a one-dimensionally expanding geometry motivated by
ultrarelativistic heavy-ion collisions. We set up local equations in terms of
Yang-Mills potentials and auxiliary fields that allow simulations of
hard-(expanding)-loop (HEL) dynamics on a lattice. We determine numerically the
evolution of plasma instabilities in the linear (Abelian) regime and also
derive their late-time behavior analytically, which is consistent with recent
numerical results on the evolution of the so-called melting color-glass
condensate. We also find a significant delay in the onset of growth of plasma
instabilities which are triggered by small rapidity fluctuations, even when the
initial state is highly anisotropic.


title: SUSY and Dark Matter Constraints from the LHC

abstract:
  The ability of the LHC to make statements about the dark matter problem is
considered, with a specific focus on supersymmetry. After reviewing the current
strategies for supersymmetry searches at the LHC (in both CMS and ATLAS), some
key ATLAS studies are used to demonstrate how one could establish that SUSY
exists before going on to measure the relic density of a neutralino WIMP
candidate. Finally, the general prospects for success at the LHC are
investigated by looking at different points in the MSSM parameter space.


title:
Canonical Constraints on Leptonic Cp Violation using UHCR neutrino
  fluxes

abstract:
  It is shown that one can in principle constrain the CP-violating parameter
delta from measurements of four independant |V_{ij}|^2, or three of them and a
ratio, in the leptonic sector. To quantify our approach, using unitarity, we
derive simple expressions in terms of four independant |V_{ij}|^2 for
cos(delta) and an expression for sin^2(delta) from J^2. Thus, depending on the
values of |V_{ij}| and their accuracy, we can set meaningful limits on |delta|.
To illustrate numerically, if |V_{u1}|^2 is close to 0.1 with a 10% precision,
and if |V_{e3}^2 is larger than 0.005 and for values of |V_{e2}|^2 and
|V_{u3}|^2 that stay within +-0.1 of the current experimental data leads to a
bound pi/2 < |delta| < pi. Alternatively, a certain combination of parameters
with values of |V_{e3}|^2 larger than 0.01 leads to a closed bound of 73 <
|delta| < 103. In general, we find that it is better to use |V_{u1}|^2 or
|V_{t1}|^2 as the fourth independant |V_{ij}|^2 and that over most of the
parameter space, delta is least sensitive to |V_{e3}|^2. With just three
independant measurements (solar, atmospheric and reactor) it is impossible to
set limits on the CP phase. In this respect, we study the use of ultra high
energy cosmic (UHCR) neutrino fluxes as the additional fourth information. We
find that within the SM, neutrino fluxes of all three flavours will be very
similar but that pushing current neutrino data to their extreme values still
allowed, ratios of cosmic neutrino fluxes can differ by up to 20%; such large
discrepancies could imply negligibly small CP-violation. We also study a non
radiative neutrino decay model and find that the neutrino fluxes can differ by
a factor of up to 3 within this model and that an accuracy of 10% on the
neutrino fluxes is sufficient to set interestin limits on delta.


title: It's a Gluino!

abstract:
  For a long time it has been known that the like-sign dilepton signature can
help establish the existence of a gluino at the LHC. To unambiguously claim
that we see a strongly interacting Majorana fermion -- which we could call a
gluino -- we need to prove that the particle responsible for the like-sign
dilepton events is indeed a fermion. Using only angular correlations in the
same gluino decay cascade which is used to measure its mass, we show how to
distinguish a universal extra dimensional interpretation with a bosonic heavy
gluon from supersymmetry with a fermionic gluino. Assuming a supersymmetric
interpretation, we show how the same angular correlations can be used to study
the left--right nature of the sfermions appearing in the decay chain.


title:
Resummation of Threshold Logarithms in Effective Field Theory For DIS,
  Drell-Yan and Higgs Production

abstract:
  We apply the effective field theoretic (EFT) approach to resum the large
perturbative logarithms arising when partonic hard scattering cross-sections
are taken to the threshold limit. We consider deep inelastic scattering,
Drell-Yan lepton pair production and the standard model Higgs production
through gluon-gluon fusion via heavy-top loop. We demonstrate the equivalence
of the EFT approach with the more conventional, factorization-based methods to
all logarithmic accuracies and to all orders in perturbation theory. Specific
EFT results are shown for the resummation up to next-to-next-to-next leading
logarithmic accuracy for the above mentioned processes. We emphasize the
relative simplicity by which we derive most of the results and more importantly
their clear physical origin. We find a new relation between the functions
$f_{(q,g)}$ in the quark and gluon form factors and the matching coefficients
in Drell-Yan and Higgs production, which may explain their universality
believed to hold to all orders in perturbation theory.