title: Nuclear matter in the chiral quark soliton model with vector mesons

abstract:
  We study the nuclear matter solution in the chiral quark soliton model
coupled to $\rho$ and $\omega$ vector mesons based on the Wigner-Seitz
approximation. It is shown that the vector mesons stabilize the soliton at
high-density region. As a result, the saturation property and incompressibility
are significantly improved.


title: The future of particle physics

abstract:
  I review the prospects for future progress in accelerator-based particle
physics


title: Hard Electroproduction of Hybrid Mesons

abstract:
  We estimate the sizeable cross section for deep exclusive electroproduction
of an exotic $J^{PC}=1^{-+}$ hybrid meson in the Bjorken regime. The production
amplitude scales like the one for usual meson electroproduction, {\it i.e.} as
$1/Q^2$. This is due to the non-vanishing leading twist distribution amplitude
for the hybrid meson, which may be normalized thanks to its relation to the
energy momentum tensor and to the QCD sum rules technique. The hard amplitude
is considered up to next--to--leading order in $\alpha_{S}$ and we explore the
consequences of fixing the renormalization scale ambiguity through the BLM
procedure.


title: Exclusive Two-Vector-Meson Production from e^+ e^- Annihilation

abstract:
  The exclusive production of pairs of vector mesons with J^{PC} = 1^{--} in
e^+ e^- collisions can proceed through e^+ e^- annihilation into two virtual
photons. At energies much greater than the meson masses, the cross section is
dominated by the independent fragmentation of the virtual photons into the
vector mesons. The fragmentation approximation is used to calculate the cross
sections and angular distributions for pairs of vector mesons that can be
produced at the B factories. The predicted cross sections for rho^0 + rho^0 and
rho^0 + phi production agree with recent measurements by the BaBar
Collaboration. For the production of two charmonium vector mesons, the
nonfragmentation corrections to the cross sections are calculated by using the
NRQCD factorization formalism. The predicted cross sections for J/psi + J/psi
and J/psi + psi(2S) production are compatible with upper limits set by the
Belle Collaboration.


title: Masses of $[{\bf 70},\ell^+]$ baryons in large $N_c$ QCD

abstract:
  Previous work is extended from SU(2) to SU(3) and we present results for the
mass spectrum of the $[{\bf 70},\ell^+]$ ($\ell=0,2$) nonstrange and strange
baryons in the $1/N_c$ expansion. We show that the dominant term is the
spin-spin interaction and its contribution vanishes at large excitations.


title: Charmed Meson Production in Proton - (ANTI)PROTON Collisions

abstract:
  We discuss and compare different approaches to include gluon transverse
momenta for heavy quark-antiquark pair and meson production. The results are
illustrated with the help of different unintegrated gluon distributions (UGDF)
from the literature. We compare results obtained with on-shell and off-shell
matrix elements and kinematics. The results are compared with recent
experimental results of the CDF collaboration.


title:
Lepton flavor violation in muonium decay and muon colliders in models
  with heavy neutrinos

abstract:
  We study the lepton-flavor-violating reaction $\mu^+ e^- \to e^+ e^-$ within
two extensions of the standard model that include heavy neutrinos. The reaction
is studied in the low energy limit in the form of muonium decay $M\to e^+ e^-$
and in the high energy regime of a muon collider. The two theoretical models we
consider are: model I, a typical see-saw model that violates lepton flavor and
number by inclusion of extra right handed neutrinos, and model II, a variant
where lepton number is conserved and which includes extra right handed as well
as left handed neutrinos, singlets under the gauge group. We find for muonium
decay into $e^+e^-$ the extremely small result $Br(M\to e^+ e^-) < 10^{-19}$ in
both scenarios. Alternatively, for $\mu^+ e^-$ collisions up to $\sqrt{s}\sim
50$ GeV we find $\sigma(\mu^+ e^- \to e^+ e^-)< 10^{-5}$ fb, while for energies
above the $W^+ W^-$ threshold we find $\sigma(\mu^+ e^- \to W^+ W^-)$ up to 1
fb.


title: Meson-Baryon Effective Chiral Lagrangians to O(q^3)

abstract:
  We construct the complete and minimal O(q^2) and O(q^3) three-flavour Lorentz
invariant chiral meson-baryon Lagrangians for the first time in the literature.
We compare with previous three-flavour studies reducing the number of
independent monomials and adding new ones that were missing.


title:
Interference between f0(980) and rho(770) resonances in B -->
  pion-pion-kaon decays

abstract:
  We study the contribution of the strong interaction between the two pions in
S- and P-waves to the weak B --> pion pion kaon decay amplitudes. The
interference between these two waves is analyzed in the pion-pion effective
mass range of the rho(770) and f0(980) resonances. We use a unitary pion-pion
and antikaon-kaon coupled-channel model to describe the S-wave interactions and
a Breit-Wigner function for the P-wave amplitude. The weak B-decay amplitudes,
obtained from QCD factorization, are supplemented with charming penguin
contributions in both waves. The four complex parameters of these long distance
terms are determined by fitting the model to the BaBar and Belle data on
B^{+,-,0} --> pi+ pi- K^{+,-,0} branching fractions, CP asymmetries, pion-pion
effective mass and helicity-angle distributions. This set of data, and in
particular the large direct CP-asymmetry for B^{+,-} --> rho0(770) K^{+,-}
decays, is well reproduced.
  The interplay of charming penguin amplitudes and the interference of S- and
P-waves describes rather successfully the experimental S and A values of the
CP-violating asymmetry for both B0 --> f0(980) K0S and B0 --> rho0(770) K0S
decays.


title: Surprises for QCD at Nonzero Chemical Potential

abstract:
  In this lecture we compare different QCD-like partition functions with
bosonic quarks and fermionic quarks at nonzero chemical potential. Although it
is not a surprise that the ground state properties of a fermionic quantum
system and a bosonic quantum system are completely different, the behavior of
partition functions with bosonic quarks does not follow our naive expectation.
Among other surprises, we find that the partition function with one bosonic
quark only exists at nonzero chemical potential if a conjugate bosonic quark
and a conjugate fermionic quark are added to the partition function.


title:
Extended Black Box Theorem for Lepton Number and Flavor Violating
  processes

abstract:
  We revisit the well known "Black Box" theorem establishing a fundamental
relation between the amplitude of neutrinoless double beta decay and the
effective Majorana neutrino mass. We extend this theorem to the general case of
arbitrary lepton number and lepton flavor violating (LFNV) processes and to the
three generation Majorana neutrino mass matrix. We demonstrate the existence of
a general set of one-to-one correspondence relations between the effective
operators generating these processes, and elements of the neutrino mass matrix,
such that if one of these two quantities vanishes the other is guaranteed to
vanish as well, and moreover, if one of these quantities is non-zero the other
is guaranteed to be non-zero. We stress that this statement remains valid even
in the presence of arbitrary new physics contributions. As a particularly
important example, we then show that neutrino oscillation data imply that
neutrinoless double beta decay must occur at a certain non-zero rate.


title: Power law scaling in Universal Extra Dimension scenarios

abstract:
  We study the power law running of gauge, Yukawa and quartic scalar couplings
in the universal extra dimension scenario where the extra dimension is accessed
by all the standard model fields. After compactifying on an $S_1 /Z_2$
orbifold, we compute one-loop contributions of the relevant Kaluza-Klein (KK)
towers to the above couplings up to a cutoff scale $\Lambda$. Beyond the scale
of inverse radius, once the KK states are excited, these couplings exhibit
power law dependence on $\Lambda$. As a result of faster running, the gauge
couplings tend to unify at a relatively low scale, and we choose our cutoff
also around that scale. For example, for a radius $R \sim 1 TeV^{-1}$, the
cutoff is around 30 TeV. We then examine the consequences of power law running
on the triviality and vacuum stability bounds on the Higgs mass. We also
comment that the supersymmetric extension of the scenario requires $R^{-1}$ to
be larger than $\sim 10^{10}$ GeV in order that the gauge couplings remain
perturbative up to the scale where they tend to unify.


title:
Sum rules for total cross-sections of hadron photoproduction on
  pseudoscalar mesons

abstract:
  Sum rules are derived relating mean squared charge radii of the pseudoscalar
mesons with the convergent integral of the difference of hadron photoproduction
cross-sections on pseudoscalar mesons.


title:
Classical and Non-Classical ADD-phenomenology with high-ET jet
  observables at collider experiments

abstract:
  We use the results from a recent investigation of hard parton-parton
gravitational scattering in the ADD scenario to make semi-quantitative
predictions for a few standard high-ET jet observables at the LHC. By
implementing these gravitational scattering results in the Pythia event
generator and combining it with the Charybdis generator for black holes, we
investigate the effects of large extra dimensions and find that, depending on
the width of the brane, the relative importance of gravitational scattering and
black hole production may change significantly. For the cases where
gravitational scatterings are important we discuss how to distinguish
gravitational scattering from standard QCD partonic scatterings. In particular
we point out that the universal colorlessness of elastic gravitational
scattering implies fewer particles between the hard jets, and that this can be
used in order to distinguish an increased jet activity induced by gravitational
scattering from an increased jet activity induced by eg. super-symmetric
extensions where the interaction is colorful.


title:
Constraints on the gluon Sivers distribution via transverse single spin
  asymmetries at midrapidity in p(transv. polarized) p -> pi^0 X processes at
  BNL RHIC

abstract:
  We consider the recent RHIC data on the transverse single spin asymmetry
(SSA) A_N, measured in p(transv. polarized) p -> pi^0 X processes at
mid-rapidity by the PHENIX collaboration. The measurement is consistent with a
vanishing SSA. We analyze this experimental information within a hard
scattering approach based on a generalized QCD factorization scheme, with
unintegrated, transverse momentum dependent (TMD), parton distribution and
fragmentation functions. It turns out that, in the kinematical region of the
data, only the gluon Sivers effect could give a large contribution to A_N; its
vanishing value is thus an indication about the possible size of the gluon
Sivers function (GSF). Approximate upper limits on its magnitude are derived.
Additional constraints obtained combining available parameterizations of the
quark Sivers function and the Burkardt sum rule (BSR) for the Sivers
distributions are also discussed.


title:
Constraints on the mSUGRA parameter space from NLO calculation of
  isospin asymmetry in B -> K* gamma

abstract:
  The contributions of supersymmetric particles in the isospin symmetry
violation in B -> K* gamma decay mode are investigated. The model parameters
are adopted from minimal Supergravity with minimal flavor violation. A complete
scan of the mSUGRA parameter space has been performed, using the next to
leading supersymmetric contributions to the relevant Wilson coefficients. The
results are compared to recent experimental data in order to obtain constraints
on the parameter space. We point out that isospin asymmetry can prove to be an
interesting observable and imposes severe restrictions on the allowed parameter
space, in particular for large values of tan(beta). The constraints obtained
with isospin asymmetry also appear as more restricting than the ones from the
branching ratio of B -> X_s gamma.


title:
Properties of D-Mesons from QCD Sum Rules with an Improved Spectral
  Function

abstract:
  The goal of this thesis is to calculate properties of D-Mesons with
QCD-Sum-Rules in order to understand the nature of D-Mesons with positive
parity. The result is that such D-Mesons most probably are Mesons with a four
quark rather than a two quark structure. In this thesis a spectral function
which contains two resonances is used to calculate the decay constants of the
first and the second resonance in the spectral function. Moreover, a
Breit-Wigner curve instead of a delta-function is used to approximate the peaks
of the resonances in the spectral function. The decay constants of the
resonaces corresponding to the second peak in the spectral functions have never
been calculated before.Also very practical problems are attacked, see the
paragraph about the misscalculation of D-Meson Sum-Rules. Another topic of this
thesis was the establishment of basical knowledge about QCD-Sum-Rules, the
Operator-Product-Expansion and Dispersion-Integrals. A discussion of these
topics and many explicite calculations are included.


title: The Onset of Quark-Hadron Duality in Pion Electroproduction

abstract:
  A large data set of charged-pion electroproduction from both hydrogen and
deuterium targets has been obtained spanning the low-energy residual-mass
region. These data conclusively show the onset of the quark-hadron duality
phenomenon, as predicted for high-energy hadron electroproduction. We construct
several ratios from these data to exhibit the relation of this phenomenon to
the high-energy factorization ansatz of electron-quark scattering and
subsequent quark-to- pion production mechanisms.


title: Neutralino annihilation to q qbar g

abstract:
  We compute the cross section for chi chi -> q qbar g at order
alpha_s^2/M_{squark}^6 arising from interference between the tree-level and
loop-induced processes. This interference term is the same order in alpha_s as
chi chi -> gg; for mass degenerate squarks M_{squark_R} = M_{squark_L} =
M_{squark} we find v_{rel} sigma_{int} = [-2 m_{chi}^2 / 3 M_{squark}^2]
v_{rel} sigma(chi chi -> gg).


title: Two fermion relativistic bound states: hyperfine shifts

abstract:
  We discuss the hyperfine shifts of the Positronium levels in a relativistic
framework, starting from a two fermion wave equation where, in addition to the
Coulomb potential, the magnetic interaction between spins is described by a
Breit term. We write the system of four first order differential equations
describing this model. We discuss its mathematical features, mainly in relation
to possible singularities that may appear at finite values of the radial
coordinate. We solve the boundary value problems both in the singular and non
singular cases and we develop a perturbation scheme, well suited for numerical
computations, that allows to calculate the hyperfine shifts for any level,
according to well established physical arguments that the Breit term must be
treated at the first perturbative order. We discuss our results, comparing them
with the corresponding values obtained from semi-classical expansions.


title: EMC effect and nuclear structure functions

abstract:
  We analyze experimental data of nuclear structure function ratios
$F_2^A/F_2^D$ for obtaining optimum parton distribution functions (PDFs) in
nuclei. Then, uncertainties of the nuclear PDFs are estimated by the Hessian
method. Parametrization of nuclear parton distribution is investigated in the
leading order of $\alpha_s$. The parton distribution are provided at $Q^2=1
GeV^2$ with a number of parameters, which are determined by a $\chi^2$ analysis
of the data on nuclear structure function. From the analysis, we propose parton
distributions at $Q^2=1 GeV^2$ for nuclei from deuteron to heavy ones with a
mass number $A\sim 208$.


title: Mass and width of the sigma

abstract:
  I report on recent work done in collaboration with Irinel Caprini and
Gilberto Colangelo. We observe that the Roy equations lead to a representation
of the pion pion scattering amplitude that exclusively involves observable
quantities, but is valid for complex values of s. At low energies, this
representation is dominated by the contributions from the two subtraction
constants, which are known to remarkable precision from the low energy theorems
of chiral perturbation theory. Evaluating the remaining contributions on the
basis of the available data, we demonstrate that the lowest resonance carries
the quantum numbers of the vacuum and occurs in the vicinity of the threshold.
Although the uncertainties in the data are substantial, the pole position can
be calculated quite accurately, because it occurs in the region where the
amplitude is dominated by the subtractions. The calculation neatly illustrates
the fact that the dynamics of the Goldstone bosons is governed by the
symmetries of QCD.


title:
Evidence for the Absence of Gluon Orbital Angular Momentum in the
  Nucleon

abstract:
  The Sivers mechanism for the single-spin asymmetry in unpolarized lepton
scattering from a transversely polarized nucleon is driven by the orbital
angular momentum carried by its quark and gluon constituents, combined with QCD
final-state interactions. Both quark and gluon mechanisms can generate such a
single-spin asymmetry, though only the quark mechanism can explain the small
single-spin asymmetry measured by the COMPASS collaboration on the deuteron,
suggesting the gluon mechanism is small relative to the quark mechanism. We
detail empirical studies through which the gluon and quark orbital angular
momentum contributions, quark-flavor by quark-flavor, can be elucidated.


title: Radiative and semileptonic B meson decay spectra

abstract:
  We review semi-inclusive charmless B decays, focussing on threshold
logarithmic resumming and on universality of QCD dynamics in radiative and
semileptonic decays.


title: NRQCD Factorization for Twist-2 Light-Cone Wave-Functions of Charmonia

abstract:
  We show that the twist-2 light-cone wave-functions of eta_c and J/\psi can be
factorized with nonrelativistic QCD(NRQCD) at one-loop level, where the
nonperturbative effects are represented by NRQCD matrix elements. The
factorization is achieved by expanding the small velocity v, which the c- or
\bar c- quark moves inside a rest quarkonium with. At leading order of v the
twist-2 light-cone wave-functions of eta_c and J/\psi can be factorized as the
product of a perturbative function and a NRQCD matrix element. The perturbative
function is calculated at one-loop level and free from any soft divergence. Our
results can be used for the production of J/\psi\eta_c through e^+e^-
-annihilation and of a charmonium in B-decays, which are studied in experiment
of two B-factories.


title:
Branching Ratio and CP Asymmetry of $B_{s} \to \rho(\omega) K $ Decays
  in the Perturbative QCD Approach

abstract:
  In this paper, we calculate the branching ratios and CP-violating asymmetries
for $B_{s}\to \rho^\pm K^\mp$, $B_{s}\to\rho^{0}\bar{K}^0 $ and
$B_{s}\to\omega\bar{K}^0$ decays in the perturbative QCD (pQCD) factorization
approach. The theoretical predictions for the CP averaged branching ratios of
the considered decays are: $Br(B_{s}\to\rho^\pm K^\mp)\approx 24.7 \times
10^{-6}$, $Br(B_{s}\to\rho^{0}\bar{K}^0) \approx 1.2 \times 10^{-7}$ and
$Br(B_{s} \to\omega\bar{K}^0) \approx 1.7 \times 10^{-7}$; and we also predict
very large direct CP-violating asymmetries for the latter two decay modes:
$A_{CP}^{dir}(\rho^{\pm} K^{\mp})\approx -12 %$,
$A_{CP}^{dir}(\rho^0\bar{K}^0)\approx -92%$,
$A_{CP}^{dir}(\omega^0\bar{K}^0)\approx 81%$,
$A_{CP}^{mix}(\rho^0\bar{K}^0)\approx -36%$, and
$A_{CP}^{mix}(\omega^0\bar{K}^0) \approx -40%$, which can be tested in the
forthcoming LHC-b experiments.


title:
Probing R-parity Violating Interactions from Top Quark Polarization at
  LHC

abstract:
  In minimal supersymmetric standard model the R-parity violating interactions
can induce anomalous top pair productions at the LHC through the t-channel
process d_R \bar d_R -> t_L \bar t_L by exchanging a slepton or u-channel
process d_R \bar d_R -> t_R \bar t_R by exchanging a squark. Such top pair
productions with certain chirality cause top quark polarization in the top pair
events. We found that at the LHC, due to the large statistics, the statistical
significance of the polarization observable and thus the probing ability for
the corresponding R-parity violating couplings are much higher than at the
Tevatron upgrade.


title:
The Role of Polarized Valons in the Flavor Symmetry Breaking of Nucleon
  Sea

abstract:
  Next-to-leading order approximation of the quark helicity distributions are
used in the frame work of polarized valon model. The flavor-asymmetry in the
light-quark sea of the nucleon can be obtained from the contributions of
unbroken sea quark distributions. We employ the polarized valon model and
extract the flavor-broken light sea distributions which are modeled with the
help of a Pauli-blocking ansatz. Using this ansatz, we can obtain broken
polarized valon distributions. From there and by employing convolution
integral, broken sea quark distributions are obtainable in this frame work. 0ur
results for $\delta u$, $\delta d$, $\delta \bar u$, $\delta \bar d$ and
$\delta \bar s$ are in good agreement with recent experimental data for
polarized parton distribution from HERMES experimental group and also with GRSV
model. Some information on orbital angular momentum as a main ingredient of
total nucleon spin are given. The $Q^2$ evolution of this quantity, using the
polarized valon model is investigated.


title:
The Physics of Beauty (& Charm [& $\tau$]) at the LHC and in the Era of
  the LHC

abstract:
  The recent successes of the SM do not weaken the arguments in favour of New
Physics residing at the TeV scale. Finding and identifying it represents the
prime challenge for a generation of high energy physicists. To differentiate
between different scenarios of New Physics we need to analyze their impact on
flavour dynamics. A continuing comprehensive program of heavy flavour studies
instrumentalizing the high sensitivity of \cp analyses is intrinsically
connected to LHC's core mission. In B decays we can typically expect no more
than moderate deviations from SM predictions. $B_s$ transitions provide an {\em
autonomous} access to New Physics not prejudiced by $\Delta M(B_s)|_{exp}\simeq
\Delta M(B_s)|_{SM}$. Dedicated studies of charm and $\tau$ decays offer unique
opportunities to observe New Physics. One challenge is whether LHCb will be
able to exploit LHC's huge charm production rate to probe for \cp asymmetries.
Likewise, to which degree ATLAS/CMS can contribute to $B$ physics and to
searches for $\tau \to 3l$. Yet to saturate the discovery potential for New
Physics in beauty, charm and $\tau$ decays we will need a comprehensive high
quality data base that only a Super-Flavour Factory can provide.


title: Matter-Antimatter Asymmetry in the Universe and an Arrow for Time

abstract:
  An overview is given of theoretical attempts to explain the matter-antimatter
asymmetry in the Universe, emphasizing particularly leptogenesis and the
Affleck-Dine mechanism.


title: Signals of Universal Extra Dimension at the ILC

abstract:
  In the minimal Universal Extra Dimension model, single production of n=2
gauge bosons provides a unique discriminating feature from supersymmetry. We
discuss how the proposed International Linear Collider can act as a n=2
factory, much in the same vein as LEP.


title: Axion and PVLAS data in a Little Higgs model

abstract:
  Little Higgs models may provide a solution to the gauge hierarchy problem in
the mass of the Higgs boson. In this framework the Higgs boson is arisen as the
pseudo-Nambu-Goldstone (PNG) boson. We show that the lepton triplet introduced
in a little Higgs model explains a small mass parameter in the double see-saw
mechanism for neutrino masses, and it can also gives an explanation for the
axion like particle recently reported by PVLAS collaboration.


title:
New structure for the off-diagonal part of neutrino effective mass
  matrix

abstract:
  Two 3x3 matrices playing the role of annihilation and creation operators in
the neutrino-flavor space of nu_e, nu_mu, nu_tau are applied to construct the
off-diagonal part of neutrino effective mass matrix M. The construction leads
to a new relation between two off-diagonal elements M_{e mu} and M_{mu tau} of
M. In the case of tribimaximal neutrino mixing, this relation implies a new
mass sum rule for nu_1, nu_2, nu_3: m_3 = eta m_2 - (eta - 1)m_1. In a
plausible option consistent with the charged-lepton mass spectrum, one gets eta
\equiv (2/3)(4 sqrt{3}+1) = 5.28547. Then, {Delta m^2_{32}}/{Delta m^2_{21}} =
eta^2 -1 = 26.9362 if m_1 = 0, what predicts Delta m^2_{32} \sim 2.2 x 10^{-3}
eV^2 when the input Delta m^2_{21} \sim 8.0 x 10^{-5} eV^2 is used.


title:
Factorization and transverse momentum for two-hadron production in
  inclusive $e^+ e^-$ annihilation

abstract:
  We study factorization of processes involving two fragmentation functions in
the case of very small transverse momenta. We consider two-hadron production in
inclusive $e^+ e^-$ annihilation and demonstrate a new simple and illustrative
method of factorization for such processes including leading order $\alpha_S$
corrections.


title:
Nucleons on the light-cone: Theory and phenomenology of baryon
  distribution amplitudes

abstract:
  This is a short review of the theory and phenomenology of baryon distribution
amplitudes, including recent applications to the studies of nucleon form
factors at intermediate momentum transfers using the light-cone sum rule
approach.


title: Comments on quasiparticle models of quark-gluon plasma

abstract:
  Here we comment on the thermodynamic inconsistency problem and the
reformulation of statistical mechanics of widely studied quasiparticle models
of quark-gluon plasma. Their starting relation, the expression for pressure
itself is a wrong choice and lead to thermodynamic inconsistency and the
requirements of the reformulation of statistical mechanics. Hence we revise the
model using the standard statistical mechanics and is thermodynamically
consistent. We also show that the other quasiparticle models may be obtained
from our general formalism as a special case under certain restrictive
condition. Further, as an example, we applied our model to explain the nonideal
behaviour of gluon plasma and obtained a remarkable good fit to the lattice
results by adjusting just a single parameter.


title:
Another step towards a no-lose theorem for NMSSM Higgs discovery at the
  LHC

abstract:
  We show how the LHC potential to detect a rather light CP-even Higgs boson of
the NMSSM, H1 or H2, decaying into CP-odd Higgs states, A1A1, can be improved
if Higgs-strahlung off W bosons and (more marginally) off top-antitop pairs are
employed alongside vector boson fusion as production modes. Our results should
help extracting at least one Higgs boson signal over the NMSSM parameter space.


title: Lattice QCD Calculation for the Physical Equation of State

abstract:
  In this report we consider the numerical simulations at finite temperature
using lattice QCD data for the computation of the thermodynamical quantities
including the pressure, energy density and the entropy density. These physical
quantities can be related to the equation of state for quarks and gluons. We
shall apply the lattice data to the evaluation of the specific structure of the
gluon and quark condensates at finite temperature in relation to the
deconfinement and chiral phase transitions. Finally we mention the quantum
nature of the phases at lower temperatures.


title: Factorization Breaking in Dijet Photoproduction with a Leading Neutron

abstract:
  The production of dijets with a leading neutron in ep-interactions at HERA is
calculated in leading order and next-to-leading order of perturbative QCD using
a pion-exchange model. Differential cross sections for deep-inelastic
scattering (DIS) and photoproduction are presented as a function of several
kinematic variables. By comparing the theoretical predictions for DIS dijets to
recent H1 data, the pion flux factor together with the parton distribution
functions of the pion is determined. The dijet cross sections in
photoproduction show factorization breaking if compared to the H1
photoproduction data. The suppression factor is S = 0.48 (0.64) for resolved
(global) suppression.


title:
Study of hyperfine structure in simple atoms and precision tests of the
  bound state QED

abstract:
  We consider the most accurate tests of bound state QED, precision theory of
simple atoms, related to the hyperfine splitting in light hydrogen-like atoms.
We discuss the HFS interval of the 1s state in muonium and positronium and of
the 2s state in hydrogen, deuterium and helium-3 ion. We summarize their QED
theory and pay attention to involved effects of strong interactions. We also
consider recent optical measurements of the 2s HFS interval in hydrogen and
deuterium.


title:
Thermal Dilepton Production from Dropping rho based on the Vector
  Manifestation

abstract:
  We study the pion electromagnetic form factor and the dilepton production
rate in hot matter using the hidden local symmetry theory as an effective field
theory for pions and rho mesons. In this framework, the chiral symmetry
restoration is realized as the vector manifestation (VM) in which the massless
vector meson becomes the chiral partner of the pion, giving a theoretical
support to the dropping rho a la Brown-Rho scaling. In the VM the vector
dominance (VD) is strongly violated near the phase transition point associated
with the dropping $\rho$. We show that the effect of the violation of the VD
substantially suppresses the dilepton production rate compared with the one
predicted by assuming the VD together with the dropping rho.


title: Accelerator Cavities as a Probe of Millicharged Particles

abstract:
  We investigate Schwinger pair production of millicharged fermions in the
strong electric field of cavities used for particle accelerators. Even without
a direct detection mechanism at hand, millicharged particles, if they exist,
contribute to the energy loss of the cavity and thus leave an imprint on the
cavity's quality factor. Already conservative estimates substantially constrain
the electric charge of these hypothetical particles; the resulting bounds are
competitive with the currently best laboratory bounds which arise from
experiments based on polarized laser light propagating in a magnetic field. We
propose an experimental setup for measuring the electric current comprised of
the millicharged particles produced in the cavity.


title: Direct search limits on the Littlest Higgs model

abstract:
  Recent direct searches for new massive particles place constraints on the
free parameters of the Littlest Higgs model. Depending on the choice of model
free parameters, the direct search limit on the global symmetry breaking scale
f can range from as low as a few hundred GeV to in excess of 4.5 TeV. The most
stringent constraints are from exclusion of the A_H using high-mass dilepton
resonance searches. The Z_H provides the best constraint in parameter regions
where the A_H decouples from leptons. Current top pair resonance data approach
but do not yet reach a useful limit in the anomaly-cancelling case, but do
provide a constraint for a limited range of parameters in other cases. A
neutral gauge boson is shown to be undetectable in dilepton resonances for a
significant range of parameter space due to decoupling from Standard Model
leptons, providing a counterexample to broad claims that a new neutral gauge
boson (sometimes generically referred to as a Z') is ruled out to a high mass
scale.


title: Non-Fermi Liquid Effective Field Theory of Dense QCD Matter

abstract:
  We review an effective field theory for the non-Fermi liquid regime of dense
QCD matter. Non-Fermi liquid effects arise due the presence of unscreened
magnetic gluon exchanges. We show that there is a systematic low energy
expansion in fractional powers and logarithms of energy. We discuss the
validity of some standard theorems of Fermi liquid theory.


title:
Precision electro-weak parameters from AdS5, localized kinetic terms and
  anomalous dimensions

abstract:
  I compare the tree level estimate of the electro-weak precision parameters in
two (exactly solvable) toy models of dynamical symmetry breaking in which the
strong dynamics is assumed to be described by a five-dimensional (weakly
coupled) gravity dual. I discuss the effect of brane-localized kinetic terms,
their use as regulators for the couplings of otherwise non-normalizable modes,
and the impact of a large deviation from its natural value for the scaling
dimension of the background field responsible for spontaneous symmetry
breaking. The latter is assumed to model the effects of walking dynamics, i.e.
of a large anomalous dimension of the chiral condensate, it has a strong impact
of the spectrum of spin-1 fields and, as a consequence, on the electro-weak
precision parameters. The main conclusion is that models of dynamical symmetry
breaking based on a large-Nc strongly interacting SU(Nc) gauge theory are
compatible with precision electro-weak constraints, and produce a very
distinctive signature testable at the LHC. Some of the considerations discussed
are directly relevant for analogous models in the context of AdS-QCD.


title: Effective Theory of Wilson Lines and Deconfinement

abstract:
  To study the deconfining phase transition at nonzero temperature, I outline
the perturbative construction of an effective theory for straight, thermal
Wilson lines. Certain large, time dependent gauge transformations play a
central role. They imply the existence of interfaces, which can be used to
determine the form of the effective theory as a gauged, nonlinear sigma model
of adjoint matrices. Especially near the transition, the Wilson line may
undergo a Higgs effect. As an adjoint field, this can generate eigenvalue
repulsion in the effective theory.


title:
Improved method for CKM constraints in charmless three-body B and B_s
  decays

abstract:
  Recently Ciuchini, Pierini and Silvestrini proposed a method for constraining
CKM parameters in B->K pi pi and B_s-> K pi pi through phase measurements of
amplitudes involving I=3/2 K*pi final states. We show that complementary
information on CKM parameters may be obtained by studying the phases of Delta
I=1 B->(K*pi)_{I=1/2}, B_s->(K*\bar K)_{I=1} and B_s->(\bar K* K)_{I=1}
amplitudes. Hadronic uncertainties in these constraints from electroweak
penguin operators O_9 and O_10, studied using flavor SU(3), are shown to be
very small in B->K pi pi and B_s->K pi pi and somewhat larger in B_s-> K\bar K
pi. The first processes imply a precise linear relation between \bar rho and
\bar eta, with a measurable slope and an intercept at \bar eta=0 involving a
theoretical error of 0.03. The decays B_s-> K pi pi permit a measurement of
gamma involving a theoretical error below a degree. We note that while
time-dependence is required when studying B^0 decays at the Upsilon(4S), it may
not be needed when studying B_s decays at hadronic colliders.


title: Vanishing dimension five proton decay operators in the SU(5) SUSY GUT

abstract:
  We propose a natural framework of
  SU(5) supersymmetric grand unified theory with the minimal particle contents,
which does not contain dimension five proton decay operators. The suitable
fermion mass hierarchy can be reproduced by higher dimensional operators of an
adjoint Higgs field which breaks
  SU(5) gauge symmetry.


title: Prompt J/psi plus photon associated electroproduction at DESY HERA

abstract:
  We study the production of a prompt J/psi meson in association with a prompt
photon in ep deep-inelastic scattering within the factorisation formalism of
non-relativistic quantum chromodynamics (NRQCD) and demonstrate that this
process provides a clean probe of the colour-octet mechanism at DESY HERA. Our
analysis is based on an updated set of non-perturbative NRQCD matrix elements
obtained through a joint fit to data on charmonium inclusive hadroproduction
from runs I and II at the Fermilab Tevatron.


title: $\eta^{(\prime)}$ productions in semileptonic B decays

abstract:
  Inspired by the new measurements on $B^{-}\to \eta^{(\prime)}\ell
\bar\nu_{\ell}$ from the BaBar Collaboration, we examine the constraint on the
flavor-singlet mechanism, proposed to understand the large branching ratios for
$B\to \eta^{\prime} K$ decays. Based on the mechanism, we study the decays of
$\bar B_{d,s}\to \eta^{(\prime)} \ell^{+} \ell^{-}$ and find that they are
sensitive to the flavor-singlet effects. In particular, we show that the decay
branching ratios of $\bar B_{d,s}\to \eta^{\prime} \ell^{+} \ell^{-}$ can be as
large as $O(10^{-8})$ and $O(10^{-6})$, respectively.


title: Magnetic Stability Analysis for Abelian and Non-Abelian Superconductors

abstract:
  We investigate the origin of Abelian and non-Abelian type magnetic
instabilities induced by Fermi surface mismatch between the two pairing
fermions in a non-relativistic model. The Abelian type instability occurs only
in gapless state and the Meissner mass squared becomes divergent at the
gapless-gapped transition point, while the non-Abelian type instability happens
in both gapless and gapped states and the divergence vanishes. The non-Abelian
type instability can be cured in strong coupling region.


title:
Illuminating the Hidden Sector of String Theory by Shining Light through
  a Magnetic Field

abstract:
  Many models of physics beyond the Standard Model predict minicharged
particles to which current and near future low-energy experiments are highly
sensitive. Such minicharges arise generically from kinetic-mixing in theories
containing at least two U(1) gauge factors. Here, we point out that the
required multiple U(1) factors, the size of kinetic-mixing, and suitable matter
representations to allow for a detection in the near future occur naturally in
the context of string theory embeddings of the Standard Model. A detection of
minicharged particles in a low energy experiment would likely be a signal of an
underlying string theory and may provide a means of testing it.


title: Chromomagnetic stability of the CFL phase with a meson current

abstract:
  We show that the color-flavor locked (CFL) phase of dense quark matter is
unstable with respect to the formation of a Goldstone boson current in the
vicinity of the point $m_s^2=2\mu\Delta$. In this Goldstone boson current phase
all components of the magnetic screening mass are real.


title:
The pressure of deconfined QCD for all temperatures and quark chemical
  potentials

abstract:
  A new method for the evaluation of the perturbative expansion of the QCD
pressure is presented which is valid for all temperatures and quark chemical
potentials in the deconfined phase, and worked out up to and including order
g^4. This new approach unifies several distinct perturbative approaches to the
equation of state, and agrees with dimensional reduction, HDL and HTL
resummation schemes, and the zero-temperature result in their respective ranges
of validity.


title: A New Perspective on Parton Distributions in Nuclei

abstract:
  We present recent progress on the study of the deep inelastic structure of
nuclei that improves our current understanding of the mechanisms of nuclear
modifications of parton distribution functions.


title: Precise match for the new experimental fine structure constant value

abstract:
  In this note I point out a highly accurate relation - to within 0.2 ppb -
between the recently discovered accurate experimental value of the fine
structure constant (1/a)_exp =137.035999710(96) and the precise solution (1/a)=
137.035999737 of a nonlinear equation for the fine structure constant generated
by the earlier suggested new universal flavor-electroweak phenomenological
constant a_o = exp(-5) as a source and hints from the new experimental data.
This perfect match for the experimental value (1/a)_exp lends additional
support to the basic notion of a new universal physical constant a_o.


title: Supersymmetry without the Desert

abstract:
  Naturalness of electroweak symmetry breaking in weak scale supersymmetric
theories may suggest the absence of the conventional supersymmetric desert. We
present a simple, realistic framework for supersymmetry in which (most of) the
virtues of the supersymmetric desert are naturally reproduced without having a
large energy interval above the weak scale. The successful supersymmetric
prediction for the low-energy gauge couplings is reproduced due to a gauged R
symmetry present in the effective theory at the weak scale. The observable
sector superpotential naturally takes the form of the next-to-minimal
supersymmetric standard model, but without being subject to the Landau pole
constraints up to the conventional unification scale. Supersymmetry breaking
masses are generated by the F-term and D-term VEVs of singlet and U(1)_R gauge
fields, as well as by anomaly mediation, at a scale not far above the weak
scale. We study the resulting patten of supersymmetry breaking masses in
detail, and find that it can be quite distinct. We construct classes of
explicit models within this framework, based on higher dimensional unified
theories with TeV-sized extra dimensions. A similar model based on a non-R
symmetry is also presented. These models have a rich phenomenology at the TeV
scale, and allow for detailed analyses of, e.g., electroweak symmetry breaking.


title: Obtaining Parton Distribution Functions from Self-Organizing Maps

abstract:
  We present an alternative algorithm to global fitting procedures to construct
Parton Distribution Functions (PDFs) parametrizations. The proposed algorithm
uses Self-Organizing Maps (SOMs) which at variance with the standard Neural
Networks, are based on competitive-learning. SOMs generate a non-uniform
projection from a high dimensional data s pace onto a low dimensional one
(usually 1 or 2 dimensions) by clustering similar PDF representations together.
The SOMs are trained on progressively narrower selections of data samples. The
selection criterion is that of convergence towards a neighborhood of the
experimental data. All available data sets on deep inelastic scattering in the
kinematical region of 0.001 < x < 0.75, and 1 <Q^2 < 100 GeV^2, with a cut on
the final state invariant mass, W^2 > 10 GeV^2 were implemented. The proposed
fitting procedure, at variance with standard neural network approaches, allows
for an increased control of the systematic bias by enabling the user to
directly control the data selection procedure at various stages of the process.


title: Collider searches and cosmology in the MSSM with heavy scalars

abstract:
  In a variety of supersymmetric extensions of the Standard Model, the scalar
partners of the quarks and leptons are predicted to be very heavy and beyond
the reach of next-generation colliders. For instance, the realization of
electroweak baryogenesis in supersymmetry requires new sources of CP-violation,
which can only be naturally accommodated with electric dipole moment
constraints if the first and second generation scalar fermions are beyond the
TeV scale. Also in focus-point supersymmetry and split supersymmetry the scalar
fermions are very heavy. In this work, the phenomenology of scenarios with
electroweak baryogenesis and in the focus point region at the LHC and ILC is
studied, which becomes challenging due to the presence of heavy scalar
fermions. Implications for the analysis of baryogenesis and dark matter are
deduced. It is found that precision measurements of superpartner properties
allow an accurate determination of the dark matter relic density in both
scenarios, while important but only incomplete information about the
baryogenesis mechanism can be obtained.


title:
Various versions of analytic QCD and skeleton-motivated evaluation of
  observables

abstract:
  We present skeleton-motivated evaluation of QCD observables. The approach can
be applied in analytic versions of QCD in certain classes of renormalization
schemes. We present two versions of analytic QCD which can be regarded as
low-energy modifications of the ``minimal'' analytic QCD and which reproduce
the measured value of the semihadronic tau decay ratio r{tau}. Further, we
describe an approach of calculating the higher order analytic couplings Ak
(k=2,3,...) on the basis of logarithmic derivatives of the analytic coupling
A1(Q^2). This approach can be easily applied in any version of analytic QCD. We
adjust the free parameters of the afore-mentioned two analytic models in such a
way that the skeleton-motivated evaluation reproduces the correct known values
of r{tau} and of the Bjorken polarized sum rule (BjPSR) db(Q^2) at a given
point (e.g., at Q^2=2 GeV^2). We then evaluate the low-energy behavior of the
Adler function dv(Q^2) and the BjPSR db(Q^2) in the afore-mentioned evaluation
approach, in the three analytic versions of QCD. We compare with the results
obtained in the ``minimal'' analytic QCD and with the evaluation approach of
Milton et al. and Shirkov.


title: A universal seesaw mechanism in five dimensions

abstract:
  We show the universal seesaw in the extra dimension setup, where three extra
vector-like fields exist in the 5D bulk with heavy masses. We take the
framework of the left-right symmetric model. The universal seesaw formula is
easily obtained as a replacement of the vector-like mass in 4D case M_i to
  2 M_* tan[pi RM_i] (M_*: 5D Planck scale,
  M_i: vector-like bulk mass, and
  R: compactification radius). The smallness of Dirac neutrino mass can be
naturally explained in the 5D setup. We also show the Majorana neutrino case.


title: Treading on the cut: Semi inclusive observables at high energy

abstract:
  We develop the formalizm for calculating semi inclusive observables at high
energy in the JIMWLK/KLWMIJ approach. We consider several examples including
diffractive processes, elastic and inclusive over the target degrees of
freedom, scattering with fixed total transverse momentum transfer and inclusive
gluon production. We discuss evolution of these observables with respect to
various rapidity variables involved in their definitions (total rapidity,
rapidity gap, width of diffractive interval etc.). We also discuss the dipole
model limit of these observables and derive closed simple (as opposed to
functional) differential equations in this approximation. We point out that
there are some interesting differences between the full JIMWLK/KLWMIJ evolution
and the dipole model evolution of diffractive cross section. In particular we
show that in the dipole approximation the target does not diffract beyond the
valence rapidity interval, consistently with the intuition suggested by the
Pomeron fan diagramms. On the other hand such diffractive processes do exist in
the full JIMWLK/KLWMIJ approach, albeit suppressed by the factor 1/N_c^2.


title:
Associated production of a single heavy T-quark in the littlest and
  simplest little Higgs models

abstract:
  The colored SU(2)-singlet heavy T-quark is one of the most crucial
ingredients in little Higgs models, which is introduced to cancel the largest
contribution of the SM top quark to the Higgs boson mass at one-loop level. In
two representative little Higgs models, the littlest Higgs model and the SU(3)
simplest Higgs model, we comprehensively study the single heavy T-quark
production at Large Hadron Collider (LHC). After presenting the possibility of
relatively light (~500 GeV) T-quark in the simplest little Higgs model, we
consider all the relevant processes, the 2->2 process of qb->q'T, the 2->3
process of qg->q'Tb, the s-channel process of q bar(q)'->T bar{b}, and the
gluon fusion process of gg->T bar{t}. We found that the 2->3 process can be
quite important, as its cross section is about 30% of the 2->2 one and it is
dominant in high p_T distributions. The s-channel and the gluon fusion
processes also show distinctive features in spite of their suppressed cross
sections. In the gluon fusion process of the simplest little Higgs model, for
example, the pseudo-scalar contribution is rather dominant over the Higgs
contribution for relatively light M_T.


title:
Regge trajectories of the Klein-Gordon equation with non-minimal
  interaction

abstract:
  A semiclassical method of deriving Regge trajectories for the bound states of
the Klein-Gordon equation with the interaction introduced in a non-minimal way
is proposed. The method is applied to construction of the quarkonium Regge
trajectories. It is found that under the relativistic generalization of the
Cornell potential the Regge trajectories of charmonium are in the same good
agreement with experimental data for introducing the confinement part of
potential either in the minimal, or non-minimal way.


title: Sneutrino Hybrid Inflation

abstract:
  We review the scenario of sneutrino hybrid inflation, where one of the
singlet sneutrinos, the superpartners of the right-handed neutrinos, plays the
role of the inflaton. In a minimal model of sneutrino hybrid inflation, the
spectral index is given by $n_s \approx 1 + 2 \gamma$. With $\gamma = 0.025 \pm
0.01$ constrained by WMAP, a running spectral index $|d n_s/d \ln k| \ll
|\gamma|$ and a tensor-to-scalar ratio $r \ll \gamma^2$ are predicted. Small
neutrino masses arise from the seesaw mechanism, with heavy masses for the
singlet (s)neutrinos generated by the vacuum expectation value of the waterfall
field after inflation. The baryon asymmetry of the universe can be explained by
non-thermal leptogenesis via sneutrino inflaton decay, with low reheat
temperature $T_RH \approx 10^6$ GeV.


title:
Strange nucleon form factors: Solitonic approach to $G_{M}^{s}$,
  $G_{E}^{s}$, $\tilde{G}_{A}^{p}$ and $\tilde{G}_{A}^{n}$ and comparison with
  world data

abstract:
  We summarize the results of the chiral quark-soliton model ($\chi$QSM)
concerning basically all form factors necessary to interpret the present data
of the parity violating electron scattering experiments SAMPLE, HAPPEX, A4 and
G0. The results particularly focus on the recently measured asymmetries and the
detailed data for various combinations of $G_{M}^{s}$, $G_{E}^{s}$,
$\tilde{G}_{A}^{p}$ and $\tilde{G}_{A}^{n}$ at $Q^2=0.1$ GeV$^2$. The
calculations yield positive strange magnetic and electric form factors and a
negative axial vector one, all being rather small. The results are very close
to the combined experimental world data from parity violating electron
scattering and elastic $\nu p$- and $\bar{\nu p}$- scattering.


title: Analysis of the X(1576) as a tetraquark state with the QCD sum rules

abstract:
  In this letter, we take the point of view that the X(1576) be tetraquark
state which consists of a scalar-diquark and an anti-scalar-diquark in relative
$P$-wave, and calculate its mass in the framework of the QCD sum rules
approach. The numerical value of the mass $m_X=(1.66\pm 0.14) GeV$ is
consistent with the experimental data, there may be some tetraquark component
in the vector meson X(1576).


title: Semileptonic Bs ->DsJ(2460)l nu decay in QCD

abstract:
  Using three point QCD sum rules method, the form factors relevant to the
semileptonic Bs ->DsJ (2460)l nu decay are calculated. The q2 dependence of
these form factors is evaluated and compared with the heavy quark effective
theory predictions. The dependence of the asymmetry parameter alpha,
characterizing the polarization of DsJ meson, on q2 is studied .The branching
ratio of this decay is also estimated and is shown that it can be easily
detected at LHC.


title:
Colliders as a simultaneous probe of supersymmetric dark matter and
  Terascale cosmology

abstract:
  Terascale supersymmetry has the potential to provide a natural explanation of
the dominant dark matter component of the standard lambda-CDM cosmology.
However once we impose the constraints on minimal supersymmetry parameters from
current particle physics data, a satisfactory dark matter abundance is no
longer prima facie natural. This Neutralino Tuning Problem could be a hint of
nonstandard cosmology during and/or after the Terascale era. To quantify this
possibility, we introduce an alternative cosmological benchmark based upon a
simple model of quintessential inflation. This benchmark has no free
parameters, so for a given supersymmetry model it allows an unambiguous
prediction of the dark matter relic density. As a example, we scan over the
parameter space of the CMSSM, comparing the neutralino relic density
predictions with the bounds from WMAP. We find that the WMAP--allowed regions
of the CMSSM are an order of magnitude larger if we use the alternative
cosmological benchmark, as opposed to lambda-CDM. Initial results from the CERN
Large Hadron Collider will distinguish between the two allowed regions.


title: Toward a Systematic Holographic QCD: A Braneless Approach

abstract:
  Recently a holographic model of hadrons motivated by AdS/CFT has been
proposed to fit the low energy data of mesons. We point out that the infrared
physics can be developed in a more systematic manner by exploiting backreaction
of the nonperturbative condensates. We show that these condensates can
naturally provide the IR cutoff corresponding to confinement, thus removing
some of the ambiguities from the original formulation of the model. We also
show how asymptotic freedom can be incorporated into the theory, and the
substantial effect it has on the glueball spectrum and gluon condensate of the
theory. A simple reinterpretation of the holographic scale results in a
non-perturbative running for alpha_s which remains finite for all energies. We
also find the leading effects of adding the higher condensate into the theory.
The difficulties for such models to reproduce the proper Regge physics lead us
to speculate about extensions of our model incorporating tachyon condensation.


title:
Precision radiative corrections to the semileptonic Dalitz plot with
  angular correlation between polarized decaying and emitted baryons: Effects
  of the four-body region

abstract:
  Analytical radiative corrections of order (\alpha/\pi)(q/M_1) are calculated
for the four-body region of the Dalitz plot of baryon semileptonic decays when
the s_1 \cdot p_2 correlation is present. Once the final result is available,
it is possible to exhibit it in terms of the corresponding final result of the
three-body region following a set of simple changes in the latter. We cover two
cases, a charged and a neutral polarized decaying baryon.


title:
Extracting CKM $\gamma$ phase from $B^{\pm} \to K^{\pm} \pi^+ \pi^-$ and
  $B^0$, $\bar B^0 \to K_s \pi^+ \pi^-$

abstract:
  We discuss some aspects of the search for CP asymmetry in the three body B
decays, revealed through the interference among neighbor resonances in the
Dalitz plot. We propose a competitive method to extract the CKM $\gamma$ angle
combining Dalitz plot amplitude analysis of $B^{\pm} \to K^{\pm} \pi^+ \pi^-$
and untagged $B^0$, $\bar B^0 \to K_s \pi^+ \pi^-$. The method also obtains the
ratio and phase difference between the {\it tree} and {\it penguin}
contributions from $B^0$ and $\bar B^0 \to K^{*\pm} \pi^{\mp} $ decays and the
CP asymmetry between $B^0$ and $\bar{B^0}$. From Monte Carlo studies of 100K
events for the neutral mesons, we show the possibility of measuring $\gamma$.


title:
Sensitivity to new supersymmetric thresholds through flavour and CP
  violating physics

abstract:
  Treating the MSSM as an effective theory below a threshold scale Lambda, we
study the consequences of having dimension-five operators in the superpotential
for flavour and CP-violating processes. Below the supersymmetric threshold such
terms generate flavour changing and/or CP-odd effective operators of dimension
six composed from the Standard Model fermions, that have the interesting
property of decoupling linearly with the threshold scale, i.e. as 1/(Lambda
m_soft), where m_soft is the scale of soft supersymmetry breaking. The
assumption of weak-scale supersymmetry, together with the stringent limits on
electric dipole moments and lepton flavour-violating processes, then provides
sensitivity to Lambda as high as 10^7-10^9 GeV. We discuss the varying
sensitivity to these scales within several MSSM benchmark scenarios and also
outline the classes of UV physics which could generate these operators.


title:
Anomalous Transport Processes in Anisotropically Expanding Quark-Gluon
  Plasmas

abstract:
  We derive an expression for the anomalous viscosity in an anisotropically
expanding quark-gluon-plasma, which arises from interactions of thermal partons
with dynamically generated color fields. The anomalous viscosity dominates over
the collisional viscosity for large velocity gradients or weak coupling. This
effect may provide an explanation for the apparent ``nearly perfect'' liquidity
of the matter produced in nuclear collisions at RHIC without the assumption
that it is a strongly coupled state.


title:
Generalized parton distributions and rapidity gap survival in exclusive
  diffractive pp scattering

abstract:
  We propose a new approach to the problem of rapidity gap survival (RGS) in
the production of high-mass systems (H = dijet, heavy quarkonium, Higgs boson)
in double-gap exclusive diffractive pp scattering, pp -> p + (gap) + H + (gap)
+ p. It is based on the idea that hard and soft interactions proceed over
widely different time- and distance scales and are thus approximately
independent. The high-mass system is produced in a hard scattering process with
exchange of two gluons between the protons. Its amplitude is calculable in
terms of the gluon generalized parton distributions (GPDs) in the protons,
which can be measured in J/psi production in exclusive ep scattering. The hard
scattering process is modified by soft spectator interactions, which we
calculate in a model-independent way in terms of the pp elastic scattering
amplitude. Contributions from inelastic intermediate states are suppressed. A
simple geometric picture of the interplay of hard and soft interactions in
diffraction is obtained. The onset of the black-disk limit in pp scattering at
TeV energies strongly suppresses diffraction at small impact parameters and is
the main factor in determining the RGS probability. Correlations between hard
and soft interactions (e.g. due to scattering from the long-range pion field of
the proton, or due to possible short-range transverse correlations between
partons) further decrease the RGS probability. We also investigate the
dependence of the diffractive cross section on the transverse momenta of the
final-state protons ("diffraction pattern"). By measuring this dependence one
can perform detailed tests of the interplay of hard and soft interactions, and
even extract information about the gluon GPD in the proton. Such studies appear
to be feasible with the planned forward detectors at the LHC.


title: QCD Corrections to Vector Boson Pair Production via Weak Boson Fusion

abstract:
  NLO-QCD corrections to vector boson pair production via weak boson fusion
have recently been calculated and implemented into flexible parton-level
Monte-Carlo programs. These allow for the computation of cross sections and
kinematical distributions within realistic experimental cuts. We summarize the
basic elements of the calculation and review phenomenological results for the
LHC.


title: Electromagnetic fields and transport coefficients in a hot pion gas

abstract:
  We present recent results on finite temperature electromagnetic form factors
and the electrical conductivity in a pion gas. The standard Chiral Perturbation
Theory power counting needs to be modified for transport coefficients. We pay
special attention to unitarity and to possible applications for dilepton and
photon production.


title: Drag Force, Jet Quenching, and AdS/QCD

abstract:
  In this note, two important transport observables in the RHIC experiment,
relaxation time constant and jet quenching parameter, are calculated from an
AdS/QCD model. A quark moving in the viscous medium such as the
Quark-Gluon-Plasma is modelled by an open string whose end point travels on the
boundary of a deformed AdS_5 black hole. The correction introduced via the
deformed AdS_5 is believed to help us better understand the data which is
expected to be measured in the RHIC.


abstract:
  I propose an alternative Hamiltonian field theoretical model for a light
quark condensate that is compatible with QCD in the deep infrared. Key
electroweak data on flavourless pseudoscalar mesons are used for necessary
renormalizations. Light quark inertial masses are redifined in a new and
broader theoretical context.


title: Parton evolution in the fixed flavor factorization scheme

abstract:
  It is argued that while the scale dependence of the parton distributions in
the fixed flavor factorization scheme is governed by three active flavors, the
scale dependence of the running coupling should nevertheless be better governed
by a variable number of active flavors.


title: Penguin-dominated B -> PV decays in NLO perturbative QCD

abstract:
  We study the penguin-dominated B -> PV decays, with P (V) representing a
pseudo-scalar (vector) meson, in the next-to-leading-order (NLO) perturbative
QCD (PQCD) formalism, concentrating on the B -> K phi, pi K^*, rho K, and omega
K modes. It is found that the NLO corrections dramatically enhance the B -> rho
K, omega K branching ratios, which were estimated to be small under the naive
factorization assumption. The patterns of the direct CP asymmetries A_{CP}(B^0
-> rho^\mp K^\pm) \approx A_{CP}(B^\pm -> rho^0 K^\pm) and |A_{CP}(B^0 ->
pi^\mp K^{*\pm})| > |A_{CP}(B^\pm -> pi^0 K^{*\pm})| are predicted, differing
from |A_{CP}(B^0 -> pi^\mp K^\pm)| >> |A_{CP}(B^\pm -> pi^0 K^\pm)|. The above
patterns, if confirmed by data, will support the source of strong phases from
the scalar penguin annihilation in PQCD. The results for the mixing-induced CP
asymmetries S_f are consistent with those obtained in the literature, except
that our S_{rho^0 K_S} is as low as 0.5.


title:
Regularities in hadron systematics, Regge trajectories and a string
  quark model

abstract:
  An empirical principle for the construction of a linear relationship between
the total angular momentum and squared-mass of baryons is proposed. In order to
examine linearity of the trajectories, a rigorous least-squares regression
analysis was performed. Unlike the standard Regge-Chew-Frautschi approach, the
constructed trajectories do not have non-linear behaviour. A similar regularity
may exist for lowest-mass mesons. The linear baryonic trajectories are well
described by a semi-classical picture based on a spinning relativistic string
with tension. The obtained numerical solution of this model was used to extract
the (di)quark masses.


title: "Semi-Realistic" F-term Inflation Model Building in Supergravity

abstract:
  We describe methods for building "semi-realistic" models of F-term inflation.
By semi-realistic we mean that they are built in, and obey the requirements of,
"semi-realistic" particle physics models. The particle physics models are taken
to be effective supergravity theories derived from orbifold compactifications
of string theory, and their requirements are taken to be modular invariance,
absence of mass terms and stabilization of moduli. We review the particle
physics models, their requirements and tools and methods for building inflation
models.


title:
On the Fukugita-Tanimoto-Yanagida Ansatz with Partially Non-degenerate
  Right-handed Majorana Neutrinos

abstract:
  Taking three right-handed Majorana neutrino masses $M^{}_i$ to be partially
non-degenerate, we make a new analysis of the Fukugita-Tanimoto-Yanagida ansatz
and confront it with current neutrino oscillation data. We determine the
parameter space for cases (A) $M^{}_3 = M^{}_2 \neq M^{}_1$, (B) $M^{}_2 =
M^{}_1 \neq M^{}_3$ and (C) $M^{}_1 = M^{}_3 \neq M^{}_2$, and examine their
respective deviations from the original $M^{}_1 = M^{}_2 = M^{}_3$ case. The
numerical constraints on three light neutrino masses, three neutrino mixing
angles and three CP-violating phases are also obtained, together with the
predictions for the Jarlskog invariant of CP violation and the effective masses
of the tritium beta decay and the neutrinoless double-beta decay.


title: Semi-exclusive DVCS

abstract:
  We consider Semi-Exclusive Deeply Virtual Compton Scattering, gamma* p \to
gamma Y (SECS), where Y is an inclusive state of intermediate mass, \Lambda_QCD
<< m_Y << Q. When the photon is produced with a large transverse momentum k_T
\sim m_Y the subprocess is hard and the struck quark fragments independently of
the target spectators. Using completeness this allows to express the SECS cross
section in terms of ordinary parton distributions. Apart from direct
comparisons with data (yet to come) new information on Bloom-Gilman duality may
be obtained through comparisons of resonance production via DVCS (gamma* p \to
gamma N*) with the SECS scaling distribution in m_Y.


title: Stability of the normal vacuum in multi-Higgs-doublet models

abstract:
  We show that the vacuum structure of a generic multi-Higgs-doublet model
shares several important features with the vacuum structure of the two and
three Higgs-doublet model. In particular, one can still define the usual charge
breaking, spontaneous CP breaking and normal (charge and CP preserving)
stationary points. We analyse the possibility of charge or spontaneous CP
breaking, by studying the relative depth of the potential in each of the
possible stationary points.


title: Baryogenesis by Heavy Quarks: Q-genesis

abstract:
  In this talk, I present a new mechanism for baryogenesis the Q-genesis in
which the heavy quarks are the source of baryon number. There exists a narrow
allowed region for the Q-genesis.


title:
CP violation difference in $B^o$ and $B^\pm$ decays explained No
  tree-penguin interference in $B^+ \to K^+\pi^o$

abstract:
  A new experimental analysis of $B\to K\pi$ decays provides finite
experimental values for the contributions from interference terms between the
dominant penguin amplitude and the color-favored and color-suppressed tree
amplitudes. These results can explain the puzzling failure to see CP violation
in $B^\pm\to K\pi$ decays. Tree-penguin interference contributions are commonly
believed to be the source of the observed direct CP violation in $B^o\to
K^\pm\pi^\mp$ decays. The data show that the color-favored and color-suppressed
tree contributions interfere destructively in $B^\pm\to K^\pm\pi^o$ decays and
nearly cancel. This suprising cancellation is not predicted by present theory.
There is also no prediction for any difference produced by changing the flavor
of the spectator quark. Isospin and Pauli effects that change with spectator
quark flavor are examined and show using group theory and the color-spun SU(6)
algebra how they produce both the near cancellation and the dependence on
spectator quark flavor. The standard $B\to K\pi$ analysis which treats
tree-penguin interference only in first order has three parameters
overdetermined by four experimental branching ratios. Previous analyses
confirmed the model but with large errors leaving the values of tree-penguin
interference contributions less that two standard deviations from zero. The new
analysis finds interference contributions well above the errors.


title:
Distinguishing new physics scenarios with polarized electron and
  positron beams

abstract:
  Contactlike nonstandard interactions can be revealed only through deviations
of observables from the standard model predictions. We consider a number of
such nonstandard scenarios, and discuss their identification as sources of
deviations in fermion-pair production processes at the International Linear
Collider, if they were observed. We emphasize the role of e^- and e^+
polarization in enhancing the identification reaches.


title: Measuring the Shape of the Extra Dimension

abstract:
  We study the possibility of extracting geometric information on the shape of
the extra dimension from four-dimensional data such as the mass of the
Kaluza-Klein (KK) mode. Assuming one compact extra dimension whose geometry can
be considered as perturbations in the flat background, we show that if there is
a Z2 symmetry in the extra dimension, for example the KK parity in models with
Universal Extra Dimensions, then the warp factor in the metric is completely
determined by the KK mass alone. Without KK parity, additional information
depending on the boundary conditions is needed to fully reconstruct the metric,
even though such information may be experimentally challenging to obtain. The
case in a general background geometry is also considered.


title:
Next-to-next-to-leading order ${\cal O}(\alpha^2\alpha_s^2)$ results for
  top quark pair production in photon--photon collisions: The one-loop squared
  contributions

abstract:
  We calculate the one-loop squared contributions to the
next-to-next-to-leading order ${\cal O}(\alpha^2\alpha_s^2)$ radiative QCD
corrections for the production of heavy quark pairs in the collisions of
unpolarized on--shell photons. In particular, we present analytical results for
the squared matrix elements that correspond to the product of the one--loop
amplitudes. All results of the perturbative calculation are given in the
dimensional regularization scheme. These results represent the Abelian part of
the corresponding gluon--induced next-to-next-to-leading order cross section
for heavy quark pair hadroproduction.


title: Self-consistent Gaussian model of nonperturbative QCD vacuum

abstract:
  We show that the minimal Gaussian model of nonlocal vacuum quark and
quark-gluon condensates in QCD generates the non-transversity of vector current
correlators. We suggest the improved Gaussian model of the nonperturbative QCD
vacuum, which respects QCD equations of motion and minimizes the revealed
gauge-invariance breakdown. We obtain the refined values of pion distribution
amplitude (DA) conformal moments using the improved QCD vacuum model and
construct the allowed region for Gegenbauer coefficients a_2 and a_4 of the
pion DA.


title:
The correction of the littlest Higgs model to the Higgs production
  process $e^{-}\gamma\to \nu_{e}W^{-}H$ in $e^{-}\gamma$ collisions

abstract:
  The littlest Higgs model is the most economical one among various little
Higgs models. In the context of the littlest Higgs(LH) model, we study the
process $e^{-}\gamma\to \nu_{e}W^{-}H$ and calculate the contributions of the
LH model to the cross section of this process. The results show that, in most
of parameter spaces preferred by the electroweak precision data, the value of
the relative correction is larger than 10%. Such correction to the process
$e^{-}\gamma\to \nu_{e}W^{-}H$ is large enough to be detected via $e^{-}\gamma$
collisions in the future high energy linear $e^{+}e^{-}$ collider($LC$)
experiment with the c.m energy $\sqrt{s}$=500 GeV and a yearly integrated
luminosity $\pounds=100fb^{-1}$, which will give an ideal way to test the
model.


title:
Non-Perturbative Study of the Light Pseudoscalar Masses in Chiral
  Dynamics

abstract:
  We perform a non-perturbative chiral study of the masses of the lightest
pseudoscalar mesons. In the calculation of the self-energies we employ the
S-wave meson-meson amplitudes taken from Unitary Chiral Perturbation Theory
(UCHPT) that include the lightest nonet of scalar resonances. Values for the
bare masses of pions and kaons are obtained, as well as an estimate of the mass
of the \eta_8. The former are found to dominate the physical pseudoscalar
masses. We then match to the self-energies from Chiral Perturbation Theory
(CHPT) to O(p^4), and a robust relation between several O(p^4) CHPT
counterterms is obtained. We also resum higher orders from our calculated
self-energies. By taking into account values determined from previous chiral
phenomenological studies of m_s/\hat{m} and 3L_7+L^r_8, we determine a tighter
region of favoured values for the O(p^4) CHPT counterterms 2L^r_6-L^r_4 and
2L^r_8-L^r_5. This determination perfectly overlaps with the recent
determinations to O(p^6) in CHPT. We warn about a likely reduction in the value
of m_s/\hat{m} by higher loop diagrams and that this is not systematically
accounted for by present lattice extrapolations. We also provide a favoured
interval of values for m_s/\hat{m} and 3L_7+L^r_8.


title:
Radiative corrections to hard spectator scattering in $B\to \pi\pi$
  decays

abstract:
  We present the calculation of the next-to-leading corrections to the tree
amplitudes which appear in the description of non-leptonic B-decays in the
factorization approach. These corrections, together with radiative corrections
to the jet functions, represent the full next-to-leading contributions to the
dominant hard spectator scattering term generated by operators $O_{1,2}$ in the
decay amplitudes. Using obtained analytical results we estimate $B\to\pi\pi$
branchings fractions in the physical (or BBNS) factorization scheme. We have
also found that the imaginary part generated in the hard spectator scattering
term is rather large compared to the imaginary part of the vertex contribution.


title:
Neutrino mass matrix in the standard parametrization with texture two
  zeros

abstract:
  We study the texture two zeros neutrino mass matrices using the standard
parametrization for the neutrino mixing matrix. We find that if the origin of
CP violation in the leptonic sector is not due to the Dirac-type complex phase
of the mixing matrix but because of some non-standard phenomena then some of
the possible texture two mass matrices, which are allowed by standard
parametrization, are found to be unsuitable to accommodate the observed data in
the neutrino sector. Furthermore, incorporating nonzero Dirac phase in our
analysis we find that many of them do not exhibit normal hierarchy.


title: Anomalous Higgs Couplings at an $e \gamma$ Collider

abstract:
  We examine the sensitivity of $e \gamma$ colliders (based on $e^+ e^-$ linear
colliders of c.m. energy 500 GeV) to the anomalous couplings of the Higgs to
W-bosons via the process $e^- \gamma \longrightarrow \nu W H$. This has the
advantage over $e^+ e^-$ collider in being able to dissociate WWH vertex from
ZZH. We are able to construct several dynamical variables which may be used to
constrain vrious couplings in the WWH vertex.


title: Two Loop QFT in the Making

abstract:
  Recent developments in the evaluation of two-loop pseudo-observables and
observables are briefly reviewed.


title: Comments on the Relativity of Shape

abstract:
  In this talk I address three topics related to the shape of hadrons:
  1. The Lorentz contraction of bound states. Few dedicated studies of this
exist - I describe a recent calculation for ordinary atoms (positronium).
  2. Does the A-dependence of nuclear structure functions indicate a change of
proton shape in the nuclear environment? (My short answer is no.)
  3. The size of Fock states contributing to processes involving large momentum
transfers. End-point configurations can be transversally extended and yet
sufficiently short-lived to contribute coherently to hard scattering.


title: Longevity of supersymmetric flat directions

abstract:
  We examine the fate of supersymmetric flat directions. We argue that the
non-perturbative decay of the flat direction via preheating is an unlikely
event. In order to address this issue, first we identify the physical degrees
of freedom and their masses in presence of a large flat direction VEV (Vacuum
Expectation Value). We explicitly show that the (complex) flat direction and
its fermionic partner are the only light {\it physical} fields in the spectrum.
If the flat direction VEV is much larger than the weak scale, and it has a
rotational motion, there will be no resonant particle production at all. The
case of multiple flat directions is more involved. We illustrate that in many
cases of physical interest, the situation becomes effectively the same as that
of a single flat direction, or collection of independent single directions. In
such cases preheating is not relevant. In an absence of a fast non-perturbative
decay, the flat direction survives long enough to affect thermalization in
supersymmetric models as described in hep-ph/0505050 and hep-ph/0512227. It can
also ``terminate'' an early stage of non-perturbative inflaton decay as
discussed in hep-ph/0603244.


title: Can the X(3872) be a 1^{++} four-quark state?

abstract:
  We use QCD spectral sum rules to test the nature of the meson X(3872),
assumed to be an exotic four-quark (c\bar{c}q\bar{q}) state with J^{PC}=1^{++}.
For definiteness, we work with the current proposed recently by Maiani et al
[1], at leading order in \alpha_s, consider the contributions of higher
dimension condensates and keep terms which are linear in the light quark mass
m_q. We find M_X=(3925+- 127) MeV which is compatible, within the errors, with
he experimental candidate X(3872), while the SU(3) breaking-terms lead to an
unusual mass-splitting M_{X^{s}}-M_X=- (61+-30) MeV. The mass-difference
between the neutral states due to isospin violation of about (2.6-3.9) MeV is
much smaller than the value (8+-3) MeV proposed in [1]. For the b-quark, we
predict M_{X_b}= (10144+-106) MeV for the X_b(b\bar{b}q \bar{q}), which is much
below the {\bar B}B* threshold in contrast to the {\bar B}B* molecule
prediction [2], and for the X_b^s(b\bar{b}s \bar{s}), a mass-splitting
M_{X^s_{b}}-M_{X_b}=-(121+-182) MeV. Our analysis also indicates that the
mass-splitting between the ground state and the radial excitation of about
(225~250) MeV is much smaller than in the case of ordinary mesons and is
(within the errors) flavour-independent. We also extract the decay constants,
analogous to f_\pi, of such mesons, which are useful for further studies of
their leptonic and hadronic decay widths. The uncertainties of our estimates
are mainly due to the ones from the c and b quark masses.


title: Real time statistical field theory

abstract:
  We have written a {\it Mathematica} program that calculates the integrand
corresponding to any amplitude in the closed-time-path formulation of real time
statistical field theory. The program is designed so that it can be used by
someone with no previous experience with {\it Mathematica}. It performs the
contractions over the tensor indices that appear in real time statistical field
theory and gives the result in the 1-2, Keldysh or RA basis. We have used the
program to calculate the ward identity for the QED 3-point function, the QED
4-point function for two photons and two fermions, and the QED 5-point function
for three photons and two fermions. In real time statistical field theory,
there are seven 3-point functions, 15 4-point functions and 31 5-point
functions. We produce a table that gives the results for all of these
functions. In addition, we give a simple general expression for the KMS
conditions between $n$-point green functions and vertex functions, in both the
Keldysh and RA bases


title: A-term inflation and the MSSM

abstract:
  The parameter space for A-term inflation is explored with $W=\lambda_p
\phi^p/(p M_P^{p-3})$. With p=6 and \lambda_p~1, the observed spectrum and
spectral tilt can be obtained with soft mass of order 10^2 GeV but not with a
much higher mass. The case p=3 requires \lambda_p~10^{-9} to 10^{-12}. The
ratio m/A requires fine-tuning, which may be justified on environmental
grounds. An extension of the MSSM to include non-renormalizable terms and/or
Dirac neutrino masses might support either A-term inflation or modular
inflation.


title: Jets in Effective Theory: Summing Phase Space Logs

abstract:
  We demonstrate how to resum phase space logarithms in the Sterman-Weinberg
(SW) dijet decay rate within the context of Soft Collinear Effective theory
(SCET). An operator basis corresponding to two and three jet events is defined
in SCET and renormalized. We obtain the RGE of the two and three jet operators
and run the operators from the scale $\mu^2 = Q^2$ to the phase space scale $
\mu^2_\delta = \delta^2 Q^2$. This phase space scale, where $\delta$ is the
cone half angle of the jet, defines the angular region of the jet. At $
\mu^2_{\delta}$ we determine the mixing of the three and two jet operators. We
combine these results with the running of the two jet shape function, which we
run down to an energy cut scale $\mu^2_{\beta}$. This defines the resumed SW
dijet decay rate in the context of SCET. The approach outlined here
demonstrates how to establish a jet definition in the context of SCET. This
allows a program of systematically improving the theoretical precision of jet
phenomenology to be carried out.


title: Hadrons as Skyrmions in the presence of isospin chemical potential

abstract:
  The stability of the Skyrmion solution in the presence of finite isospin
chemical potential $\mu $ is considered, showing the existence of a critical
value $\mu_{c} = 222.8$ MeV where the Skyrmion mass vanishes. Using the
Hamiltonian formulation, in terms of collective variables, we discuss the
behavior of different skyrmionic parameters as function of the isospin chemical
potential ($\mu$), such as the energy density, the isoscalar radius and the
isoscalar magnetic radius. We found that the radii start to grow very fast for
$\mu \geq 140$ MeV, suggesting the occurrence of a phase transition.


title: $pp \to pp\eta'$ reaction at high energies

abstract:
  We discuss double-diffractive (double-elastic) production of the
$\eta'$-meson in the $pp \to p\eta'p$ reaction within the formalism of
unintegrated gluon distribution functions (UGDF). We estimate also the
contribution of $\gamma^* \gamma^* \to \eta'$ fusion. The distributions in the
Feynman $x_F$ (or rapidity), transferred four-momenta squared between initial
and final protons ($t_1$, $t_2$) and azimuthal angle difference between
outgoing protons ($\Phi$) are calculated. The deviations from the
$\sin^2(\Phi)$ dependence predicted by one-step vector-vector-pseudoscalar
coupling are quantified and discussed. The results are compared with the
results of the WA102 collaboration at CERN. Most of the models of UGDF from the
literature give too small cross section as compared to the WA102 data and
predict angular distribution in relative azimuthal angle strongly asymmetric
with respect to $\pi/2$ in disagreement with the WA102 data. This points to a
different mechanism at the WA102 energy. Predictions for RHIC, Tevatron and LHC
are given. We find that the normalization, $t_{1,2}$ dependences as well as
deviations from $\sin^2(\Phi)$ of double-diffractive double-elastic cross
section are extremely sensitive to the choice of UGDF. Possible implications
for UGDFs are discussed.


title: Higgs Decay to Photons at Two Loops

abstract:
  The calculation of the two-loop corrections to the partial width of an
intermediate-mass Higgs boson decaying into a pair of photons is reviewed. The
main focus lies on the electroweak (EW) contributions. The sum of the EW
corrections ranges from -4% to 0% for a Higgs mass between 100 GeV and 150 GeV,
while the complete correction at two-loop order amounts to less than +-1.5% in
this regime.


title:
Mesons and diquarks in neutral color superconducting quark matter with
  $\beta$-equilibrium

abstract:
  The spectrum of meson and diquark excitations in cold color-superconducting
(2SC) quark matter is investigated under local color and electric neutrality
constraints with $\beta$-equilibrium. A 2-flavored Nambu--Jona-Lasinio type
model including a baryon $\mu_B$, color $\mu_8$, and electric $\mu_Q$ chemical
potentials is used. Two relations between coupling constants $H$ and $G$ in the
diquark- and quark-antiquark channels, correspondingly, are treated, $H=3G/4$
and $H=G$. At $H=3G/4$ the gapless- and at $H=G$ the gapped neutral color
superconductivity is realized. It is shown that color and electrical neutrality
together with $\beta$-equilibrium lead to a strong mass splitting within the
pion isotriplet in the 2SC phase (both gapped and gapless), in contrast with
non--neutral matter. It is also shown that the properties of the physical
$SU(2)_c$-singlet diquark excitation in the 2SC ground state varies for
different parameterization schemes. Thus, for $H=3G/4$ one finds a heavy
resonance with mass $\sim$ 1100 MeV in the non--neutral (gapped) case, whereas,
if neutrality is imposed, a stable diquark with mass $\sim\mu_Q\sim$ 200 MeV
appears in the gapless 2SC phase. For $H=G$, there is again a resonance (with
the mass $\sim$ 300 MeV) in the neutral gapped 2SC phase. Hence, the existence
of the stable massive SU(2)$_c$-singlet diquark excitation is a new peculiarity
of the gapless 2SC.


title: Simulation of jet quenching in heavy ion collisions

abstract:
  The method to simulate the rescattering and energy loss of hard partons in
heavy ion collisions has been developed. The model is a fast Monte-Carlo tool
introduced to modify a standard PYTHIA jet event. The full heavy ion event is
obtained as a superposition of a soft hydro-type state and hard multi-jets. The
model is applied to analysis of the jet quenching pattern at RHIC and LHC.


title: Simple Approach to Renormalize the Cabibbo-Kobayashi-Maskawa Matrix

abstract:
  We present an on-shell scheme to renormalize the Cabibbo-Kobayashi-Maskawa
(CKM) matrix. It is based on a novel procedure to separate the external-leg
mixing corrections into gauge-independent self-mass and gauge-dependent
wave-function renormalization contributions, and to implement the on-shell
renormalization of the former with non-diagonal mass counterterm matrices.
Diagonalization of the complete mass matrix leads to an explicit CKM
counterterm matrix, which automatically satisfies all the following important
properties: it is gauge independent, preserves unitarity, and leads to
renormalized amplitudes that are non-singular in the limit in which any two
fermions become mass degenerate.


title: Third-order QCD results on form factors and coefficient functions

abstract:
  We summarize recent higher-order QCD results based, directly or indirectly,
on the Mellin-space computation of the next-to-next-to-leading-order splitting
functions governing the evolution of hadronic parton distributions.
Specifically, we briefly present third-order results for the coefficient
functions in inclusive deep-inelastic scattering (including the structure
function F_3 not published so far), the on-shell quark and gluon form factors,
and the total cross section for Higgs production at hadron colliders.


title:
QCD threshold corrections to di-lepton and Higgs rapidity distributions
  beyond N${}^2$LO

abstract:
  We present threshold enhanced QCD corrections to rapidity distributions of
di-leptons in the Drell-Yan process and of Higgs particles in both gluon fusion
and bottom quark annihilation processes using Sudakov resummed cross sections.
We have used renormalisation group invariance and the mass factorisation
theorem that these hard scattering cross sections satisfy as well as Sudakov
resummation of QCD amplitudes. We find that these higher order threshold QCD
corrections stabilise the theoretical predictions under scale variations.


title:
Majorana neutrinos and lepton-number-violating signals in top-quark and
  W-boson rare decays

abstract:
  We discuss rare lepton-number-violating top-quark and W-boson four-body
decays to final states containing a same-charge lepton pair, of the same or of
different flavors: t -> b W- li^+ lj^+ and W+ -> J J' li^+ lj^+, where i \ne j
or i=j and J J' stands for two light jets originating from a (u-bar d) or a
(c-bar s) pair. These \Delta L=2 decays are forbidden in the Standard Model and
may be mediated by exchanges of Majorana neutrinos. We adopt a model
independent approach for the Majorana neutrinos mixing pattern and calculate
the branching ratios (BR) for these decays. We find, for example, that for O(1)
mixings between heavy and light Majorana neutrinos (not likely but not ruled
out) and if at least one of the heavy Majorana neutrinos has a mass of ~100
GeV, then the BR's for these decays are: BR(t -> b li^+ lj^+ W-) ~ 10^{-4} and
BR(W+ -> li^+ lj^+ J J') ~ 10^{-7} if m_N ~ 100 GeV and BR(t -> b li^+ lj^+ J
J') ~ BR(W+ -> li^+ lj^+ J J') ~ 0.01 if m_N < 50 GeV. Taking into account the
present limits on the neutrino mixing parameters, we obtain more realistic
values for these BR's: BR(t -> b li^+ lj^+ W-) ~ 10^{-6} and BR(W+ -> li^+ lj^+
J J') ~ 10^{-10} for m_N ~ 100 GeV and BR(t -> b li^+ lj^+ J J') ~ BR(W+ ->
li^+ lj^+ J J') ~ 10^{-6} for m_N < 50 GeV.


title: Visible Cascade Higgs Decays to Four Photons at Hadron Colliders

abstract:
  The presence of a new singlet scalar particle a can open up new decay
channels for the Higgs boson, through cascades of the form h -> 2a -> X,
possibly making discovery through standard model channels impossible. If a is
CP-odd, its decay products are particularly sensitive to physics beyond the
standard model. Quantum effects from heavy fields can naturally make gluonic
decay, a -> 2g, the dominant decay mode, resulting in a h -> 4 g decay which is
difficult to observe at hadron colliders, and is allowed by LEP for m_h > 82
GeV. However, there are usually associated decays with photons, either h -> 2g
2gamma or h -> 4gamma, which are more promising. The decay h -> 2g 2gamma only
allows discovery of the a particle and not the Higgs whereas h -> 4gamma is a
clean channel that can discover both particles. We determine what branching
ratios are required for discovery at LHC and find that with 300 fb^-1 of
luminosity, a branching ratio of order 10^-4 is sufficient for a large region
of Higgs masses. Due to a lower expected luminosity of ~ 8 fb^-1, discovery at
the Tevatron requires more than 5 x 10^-3 in branching ratio.


title: Gauge dependence ambiguity and chemical potential in thermal U(1) theory

abstract:
  In this letter we explore the dependence on the gauge fixing condition of
several quantities in the U(1) Higgs model at finite temperature and chemical
potential. We compute the effective potential at the one loop level, using a
gauge fixing condition that depends on $\mu$ and which allows to decouple the
contributions of the different fields in the model. In this way we get the mass
spectrum and the characterization of the phase transition, pointing out in each
case how these quantities depend on the gauge fixing parameter $\xi$. When
$\mu$ vanishes, we agree with previous results if $\xi=0$. The gauge dependence
problem is also analyzed from the perspective of the Nielsen identities.


title: Transverse imaging of the proton in exclusive diffractive pp scattering

abstract:
  In a recent paper (hep-ph/0608271) we describe a new approach to rapidity gap
survival (RGS) in the production of high-mass systems (H = dijet, Higgs, etc.)
in exclusive double-gap diffractive pp scattering, pp -> p + H + p. It is based
on the idea that hard and soft interactions are approximately independent (QCD
factorization), and allows us to calculate the RGS probability in a
model-independent way in terms of the gluon generalized parton distributions
(GPDs) in the colliding protons and the pp elastic scattering amplitude. Here
we focus on the transverse momentum dependence of the cross section. By
measuring the "diffraction pattern," one can perform detailed tests of the
interplay of hard and soft interactions, and even extract information about the
gluon GPD in the proton from the data.


title: CP violation for neutral charmed meson decays to CP eigenstates

abstract:
  CP asymmetries for neutral charmed meson decays to CP eigenstates are
carefully studied. The formulas and numerical results are presented. The impact
on experiments is briefly discussed.


title:
Determining the global minimum of Higgs potentials via Groebner bases -
  applied to the NMSSM

abstract:
  Determining the global minimum of Higgs potentials with several Higgs fields
like the next-to-minimal supersymmetric extension of the Standard Model (NMSSM)
is a non-trivial task already at the tree level. The global minimum of a Higgs
potential can be found from the set of all its stationary points defined by a
multivariate polynomial system of equations. We introduce here the algebraic
Groebner basis approach to solve this system of equations. We apply the method
to the NMSSM with CP conserving as well as CP violating parameters. The results
reveal an interesting stationary-point structure of the potential. Requiring
the global minimum to give the electroweak symmetry breaking observed in Nature
excludes large parts of the parameter space.


title: Constraints on Hybrid Inflation from Flat Directions in Supersymmetry

abstract:
  We examine the constraints on F-term hybrid inflation by considering the flat
directions in the Minimal Supersymmetric Standard Model (MSSM). We find that
some coupling terms between the flat direction fields and the field which
dominates the energy density during inflation are quite dangerous and can cause
the no-exit of hybrid inflation even if their coupling strength is suppressed
by Planck scale. Such couplings must be forbidden by imposing some symmetry for
a successful F-term hybrid inflation. At the same time, we find that in the
D-term inflation these couplings can be avoided naturally. Further, given the
tachyonic preheating, we discuss the feasibility of Affleck-Dine baryogenesis
after the F-term and D-term inflations.


title: Dynamical study of ${\bf QQ-\bar u \bar d}$ mesons

abstract:
  It has been recently conjectured by Selem and Wilczek \cite{Sel06} the
existence of a $ss-[\bar u \bar d]$ meson due to strong correlations between
the two light antiquarks. We make a detailed study of this system within a
dynamical quark model which has proven to be successful in reproducing the most
important features of low-energy hadron phenomenology. Our results, obtained
within a parameter-free calculation, show that the antidiquark component of the
$ss \bar u \bar d$ system indeed entails the stronger attraction, and drives
its energy much lower than the $\bar{N}\Xi$ threshold, but still above the
$\bar{K^0} {K^*}^-$ or $\bar{{K^*}^0} K^-$ thresholds. We have also studied the
$cc \bar u \bar d$ and $bb \bar u \bar d$ systems. Exotic mesons are only
expected to exist in the limit of large mass for the two-quark subsystem,
$bb\bar u \bar d$, since the calculated mass is below the $\bar{B^0} {B^*}^-$
or $\bar{{B^*}^0} B^-$ thresholds.


title:
Diffractive Double-Elastic Production of $\eta$' and $\eta_c$ in the $p
  p \to p X p$ Reaction

abstract:
  I discuss double-diffractive (double-elastic) production of the $\eta'$ and
$\eta_c$ mesons in the $pp \to p X p$ reaction within the formalism of
unintegrated gluon distribution functions (UGDF). The contribution of $\gamma^*
\gamma^* \to \eta'$ fusion is estimated. The distributions in the Feynman $x_F$
(or rapidity), transferred four-momenta squared between initial and final
protons ($t_1$, $t_2$) and azimuthal angle difference between outgoing protons
($\Phi$) are calculated and discussed. The results are compared with the WA102
data. Predictions at higher energies are presented.


title:
The boundary of the first order chiral phase transition in the
  m_pi-m_K--plane with a linear sigma model

abstract:
  Tree-level and complete one-loop parametrisation of the linear sigma model
(LSM) is performed and the phase boundary between first order and crossover
transition regions of the m_pi-m_K-plane is determined using the optimised
perturbation theory (OPT) as a resummation tool of perturbative series. Away
from the physical point the parameters of the model were determined by making
use of chiral perturbation theory (ChPT). The location of the phase boundary
for m_pi=m_K and of the tricritical point (TCP) on the m_pi=0 were estimated.


title:
Extraction of the atmospheric neutrino fluxes from experimental event
  rate data

abstract:
  The precise knowledge of the atmospheric neutrino fluxes is a key ingredient
in the interpretation of the results from any atmospheric neutrino experiment.
In the standard atmospheric neutrino data analysis, these fluxes are
theoretical inputs obtained from sophisticated numerical calculations. In this
contribution we present an alternative approach to the determination of the
atmospheric neutrino fluxes based on the direct extraction from the
experimental data on neutrino event rates. The extraction is achieved by means
of a combination of artificial neural networks as interpolants and Monte Carlo
methods.


title:
Chiral condensate thermal evolution at finite baryon chemical potential
  within Chiral Perturbation Theory

abstract:
  We present a model independent study of the chiral condensate evolution in a
hadronic gas, in terms of temperature and baryon chemical potential. The
meson-meson interactions are described within Chiral Perturbation Theory and
the pion-nucleon interaction by means of Heavy Baryon Chiral Perturbation
Theory, both at one loop, and nucleon-nucleon interactions can be safely
neglected within our hadronic gas domain of validity. Together with the virial
expansion, this provides a systematic expansion at low temperatures and
chemical potentials, which includes the physical quark masses. This can serve
as a guideline for further studies on the lattice. We also obtain estimates of
the critical line of temperature and chemical potential where the chiral
condensate melts, which systematically lie somewhat higher than recent lattice
calculations but are consistent with several hadronic models. We have also
estimated uncertainties due to chiral parameters, heavier hadrons and higher
orders through unitarized Chiral Perturbation Theory.


title: Oscillations of solar atmosphere neutrinos

abstract:
  The Sun is a source of high energy neutrinos (E > 10 GeV) produced by cosmic
ray interactions in the solar atmosphere. We study the impact of three-flavor
oscillations (in vacuum and in matter) on solar atmosphere neutrinos, and
calculate their observable fluxes at Earth, as well as their event rates in a
kilometer-scale detector in water or ice. We find that peculiar three-flavor
oscillation effects in matter, which can occur in the energy range probed by
solar atmosphere neutrinos, are significantly suppressed by averaging over the
production region and over the neutrino and antineutrino components. In
particular, we find that the relation between the neutrino fluxes at the Sun
and at the Earth can be approximately expressed in terms of phase-averaged
``vacuum'' oscillations, dominated by a single mixing parameter (the angle
theta_23).


title: Tevatron-for-LHC Report: Preparations for Discoveries

abstract:
  This is the "TeV4LHC" report of the "Physics Landscapes" Working Group,
focused on facilitating the start-up of physics explorations at the LHC by
using the experience gained at the Tevatron. We present experimental and
theoretical results that can be employed to probe various scenarios for physics
beyond the Standard Model.