title: The Color-Superconducting {'}t Hooft Interaction

abstract:
  We consider the effect of a six-fermion interaction of the {'}t Hooft form in
the quark-quark channel on the ground state of matter at finite density. The
coupling constant for this new term is varied within the limits suggested by
naturalness. The flavor-mixing effects of the additional term destabilize the
color-flavor-locked (CFL) and, to a lesser extent, the two-color
superconducting (2SC) phases of quark matter, especially for positive values of
the coupling. For some values of the coupling, the critical density for the CFL
phase is nearly larger than the maximum density in the neutron stars. We
comment on the implications for neutron star evolution.


title:
Double-lepton polarization asymmetries in the Exclusive (B -> rho l^+
  l^-) decay beyond the Standard Model

abstract:
  The double-lepton polarization asymmetries in (B -> rho l^+ l^-) decay is
analyzed in a model independent framework. The general expressions for nine
double-polarization asymmetries are calculated. It is shown that the study of
the double-lepton polarization asymmetries proves to be very useful tool in
looking for new physics beyond the standard model.


title:
Use of W-Boson Longitudinal-Transverse Interference in Top Quark
  Spin-Correlation Functions

abstract:
  Most of this paper consists of the derivation of general beam-referenced
stage-two spin-correlation functions for the analysis of top-antitop
pair-production at the Tevatron, at the Large Hadron Collider, and/or at an
International Linear Collider. However, for the charged-lepton-plus-jets
reaction $q \bar{q} \to t \bar{t} \to (W^+ b) (W^- \bar{b}) \to (l^{+} \nu b)
(W^- \bar{b})$, there is a simple 3-angle spin-correlation function for
determination of the relative sign of, or for measurement of a possible
non-trivial phase between the two dominant $\lambda_b = -1/2 $ helicity
amplitudes for the $t\to W^{+}b$ decay mode. For the CP-conjugate case, there
is an analogous function and tests for $\bar{t} \to W^{-} \bar{b}$ decay. These
results make use of W-boson longitudinal-transverse interference.


title:
QCD Collisional Energy Loss in an Increasingly Interacting Quark Gluon
  Plasma

abstract:
  The discovery of the jet quenching in central Au + Au collisions at the
Relativistic Heavy-ion Collider (RHIC) at Brookhaven National Laboratory has
provided clear evidence for the formation of strongly interacting dense matter.
It has been predicted to occur due to the energy loss of high energy partons
that propagate through the quark gluon plasma. In this paper we investigate the
dependence of the parton energy loss due to elastic scatterings in a parton
plasma on the value of the strong coupling and its running with the evolution
of the system. We analyze different prescriptions for the QCD coupling and
calculate the energy and length dependence of the fractional energy loss.
Moreover, the partonic quenching factor for light and heavy quarks is
estimated. We found that the predicted enhancement of the heavy to light
hadrons ($D/\pi$) ratio is strongly dependent on the running of the QCD
coupling constant.


title: Stopping Gluinos

abstract:
  Long lived gluinos are the trademark of split supersymmetry. They form
R-hadrons that, when charged, efficiently lose energy in matter via ionisation.
Independent of R-spectroscopy and initial hadronization, a fraction of
R-hadrons become charged while traversing a detector. This results in a large
number of stopped gluinos at present and future detectors. For a 300 GeV
gluino, $10^6$ will stop each year in LHC detectors, while several hundred stop
in detectors during Run II at the Tevatron. The subsequent decays of stopped
gluinos produce distinctive depositions of energy in calorimeters with no
activity in either the tracker or the muon chamber. The gluino lifetime can be
determined by looking for events where both gluinos stop and subsequently
decay.


title:
WMAP Dark Matter Constraints and Yukawa Unification in SUGRA models with
  CP Phases

abstract:
  The compatibility of producing the observed amount of dark matter, as
indicated by the WMAP data, through the relic abundance of neutralinos with
Yukawa unification and with the measured rate of $b\to s \gamma$ is analyzed in
mSUGRA and extended SUGRA unified models with the inclusion of CP phases. The
CP phases affect the analysis in several ways, e.g., through the threshold
corrections to the b-quark mass, via their effects on the neutralino relic
density and through the SUSY contribution to the BR($b\to s \gamma$) which is
sensitive to the CP phases. We present some specific models with large SUSY
phases, which can accommodate the fermion electric dipole moment constraints
and give a neutralino relic density in agreement with observations as well as
with the b-$\tau$ unification constraint. The possibility of achieving WMAP
relic density constraints with full Yukawa unification is also explored.


title: Supersymmetry Parameter Analysis with Fittino

abstract:
  We present the results of a realistic global fit of the Lagrangian parameters
of the Minimal Supersymmetric Standard Model to simulated data from ILC and LHC
with realistic estimates of the observable uncertainties. Higher order
radiative corrections are accounted for where ever possible to date. Results
are obtained for a modified SPS1a MSSM benchmark scenario but they were checked
not to depend critically on this assumption. Exploiting a simulated annealing
algorithm, a stable result is obtained without any a priori assumptions on the
fit parameters. Most of the Lagrangian parameters can be extracted at the
percent level or better if theoretical uncertainties are neglected. Neither LHC
nor ILC measurements alone will be sufficient to obtain a stable result. The
effects of theoretical uncertainties arising from unknown higher-order
corrections and parametric uncertainties are examined qualitatively. They
appear to be relevant and the result motivates further precision calculations.


title: Advanced Predictions for Moments of the B->X_s+gamma Photon Spectrum

abstract:
  Based on a new, exact QCD factorization formula for the partial B->X_s+gamma
decay rate with a restriction on large photon energy, improved predictions are
presented for the partial moments <E_gamma> and <E_gamma^2>-<E_gamma>^2 of the
photon spectrum defined with a cut E_gamma>E_0. In the region where
Delta=m_b-2E_0 is large compared with Lambda_{QCD}, a theoretical description
without recourse to shape functions can be obtained. However, for Delta<<m_b it
is important to separate short-distance contributions arising from different
scales. The leading terms in the heavy-quark expansion of the moments receive
contributions from the scales Delta and \sqrt{m_b Delta} only, but not from the
hard scale m_b. For these terms, a complete scale separation is achieved at
next-to-next-to-leading order in renormalization-group improved perturbation
theory, including two-loop matching contributions and three-loop running. The
results presented here can be used to extract the b-quark mass and the quantity
mu_pi^2 with excellent theoretical precision. A fit to experimental data
reported by the Belle Collaboration yields
m_b^{SF}=(4.62+-0.10_{exp}+-0.03_{th})GeV and
mu_pi^{2,SF}=(0.11+-0.19_{exp}+-0.08_{th})GeV^2 in the shape-function scheme at
a scale mu_f=1.5GeV, while m_b^{kin}=(4.54+-0.11_{exp}+-0.04_{th})GeV and
mu_pi^{2,kin}=(0.49+-0.18_{exp}+-0.09_{th})GeV^2 in the kinetic scheme at a
scale mu_f=1GeV.


title: Possible new interactions of neutrino and the KATRIN experiment

abstract:
  We analyse the possible role of new interactions of neutrino in the
forthcoming tritium beta decay experiment KATRIN aimed at detecting the
neutrino mass with the sensitivity of 0.3 - 0.2 eV. It is shown that under
certain circumstances the standard procedure of data analysis would have to be
modified by the introduction of an extra parameter describing the strength of
the new interactions. Our model simulations show that the modified procedure
may improve the quality of the fit compared with the standard case. Ignoring
the possibility of new interactions may lead to a systematic error in the
neutrino mass determination.


title: Challenge to the Mystery of the Charged Lepton Mass Formula

abstract:
  Why the charged lepton mass formula m_e +m_\mu +m_\tau = {2/3}
(\sqrt{m_e}+\sqrt{m_\mu} +\sqrt{m_\tau})^2 is mysterious is reviewed, and
guiding principles to solve the mystery are presented. According to the
principles, an example of such a mass generation mechanism is proposed, where
the origin of the mass spectrum is attributed not to the structure of the
Yukawa coupling constants, but to a structure of vacuum expectation values of
flavor-triplet scalars under Z_4 \times S_3 symmetries.


title: Neutrino Oscillations in the Scheme of Charge (Couple Constant) Mixings

abstract:
  In the Standard theory of neutrino oscillations is used scheme of mass
mixings, i.e., oscillation parameters are expressed via terms of mass matrix.
In this work neutrino oscillations generated by charge (the weak interaction
couple constants) mixings are considered. Expressions for angle mixings and
lengths of oscillations are obtained. The expressions of the probability for
three neutrino oscillations are given. Neutrino oscillations in this scheme
(mechanism) are virtual if neutrino masses are not equal and real if neutrino
masses are equal.


title:
Enhancement of W+/- H-/+ Production at Hadron Colliders in the Two Higgs
  Doublet Model

abstract:
  We discuss the associated W+/- H-/+ production at the CERN Large Hadron
Collider. The dependence of the hadronic cross section on the Higgs sector
parameters is investigated in detail in the framework of the general Two Higgs
Doublet Model (THDM). We study the possible enhancement of the THDM prediction
for the cross section compared to the prediction of the Minimal Supersymmetric
Standard Model (MSSM). We find regions in the THDM parameter space where the
THDM prediction can exceed the one of the MSSM by two orders of magnitude.
These regions of large cross section are in agreement with theoretical bounds
on the model, derived from the requirement of vacuum stability and perturbative
unitarity, and are not excluded by experimental constraints.


title: A QCD sum rule analysis of the pentaquark

abstract:
  We perform a QCD sum rule calculation to determine the mass and the parity of
the lowest lying pentaquark state. We include operators up to dimension $d=13$
in the OPE and the direct instanton contributions. We find evidence for a
positive parity state. The contribution from operators of dimension $d>5$ is
instrumental in determining the parity of the state and achieving the
convergence of the sum rule.


title: A Variable Flavour Number Scheme at NNLO

abstract:
  I present a formulation of a Variable Flavour Number Scheme for heavy quarks
that is implemented up to NNLO in the strong coupling constant and may be used
in NNLO global fits for parton distributions.


title: Status Report of NNLO QCD Calculations

abstract:
  We review recent progress in next-to-next-to-leading order (NNLO)
perturbative QCD calculations with special emphasis on results ready for
phenomenological applications. Important examples are new results on structure
functions and jet or Higgs boson production. In addition, we describe new
calculational techniques based on twistors and their potential for efficient
calculations of multiparticle amplitudes.


title: Effects of the t t-bar threshold in e+e- to t t-bar H

abstract:
  In the region where the Higgs energy is large the process e+e- to t t-bar H
is governed by nonrelativistic QCD dynamics and one has to employ effective
theory methods to make first principles QCD predictions. In this talk we use
the effective theory vNRQCD to compute the Higgs energy distribution at
next-to-leading logarithmic approximation. It is shown that the corrections are
particularly important for smaller c.m. energies.


title: The MSSM Higgs Sector at O(alpha_b alpha_s) and Beyond

abstract:
  We evaluate O(alpha_b alpha_s) corrections in the MSSM Higgs boson sector,
including an analysis of the renormalization in the bottom/scalar bottom
sector. For mu < 0 the genuine two-loop corrections to the mass of the lightest
Higgs boson mass can amount up to 3 GeV. Different renormalization schemes are
applied and numerically compared. Likewise the residual dependence on the
renormalization scale is investigated. This allows to determine the remaining
theoretical uncertainties from unknown higher-order corrections at O(alpha_b
alpha_s^2) for different regions of the MSSM parameter space.


title: Proton Decay in a 6D SO(10) model

abstract:
  We present a study of proton decay in a supersymmetric $ SO(10)$ gauge theory
in six dimensions compactified on an orbifold. The dimension 5 proton decay
operators are absent, but the dimension 6 are enhanced due to the presence of
KK towers. We resum the KK modes up to the cut-off of the theory and find the
rate for the dominant mode $p \to \pi^0 e^{+} $. We explore also the flavour
dependence, due to the different localization of states in the extra dimensions
and find that it is possible to distinguish the model from the usual 4D $
SU(5)/SO(10)$ models.


title: The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry

abstract:
  We present `twin Higgs models', simple realizations of the Higgs as a
pseudo-Goldstone boson that protect the weak scale from radiative corrections
up to scales of order 5 - 10 TeV. In the ultra-violet these theories have a
discrete symmetry which interchanges each Standard Model particle with a
corresponding particle which transforms under a twin or mirror Standard Model
gauge group. In addition, the Higgs sector respects an approximate global SU(4)
symmetry. When this global symmetry is broken, the discrete symmetry tightly
constrains the form of corrections to the pseudo-Goldstone Higgs potential,
allowing natural electroweak symmetry breaking. Precision electroweak
constraints are satisfied by construction. These models demonstrate that,
contrary to the conventional wisdom, stabilizing the weak scale does not
require new light particles charged under the Standard Model gauge groups.


title: Neutrino Physics

abstract:
  The theoretical and experimental bases of neutrino mass and mixing are
reviewed. A brief chronological evolution of the weak interactions, the
electroweak Standard Model, and neutrinos is presented. Dirac and Majorana mass
terms are explained as well as models such as the seesaw mechanism. Schemes for
two, three and four neutrino mixings are presented.


title: Regularization of supersymmetric theories: Recent improvements

abstract:
  Recent progress concerning regularization of supersymmetric theories is
reviewed. Dimensional reduction is reformulated in a mathematically consistent
way, and an elegant and general method is presented that allows to study the
supersymmetry-invariance of dimensional reduction in an easy manner. This
method is applied to several supersymmetry identities at the one- and two-loop
level, and thus the extent to which dimensional reduction is known to preserve
supersymmetry is significantly enlarged.


title: Two-loop contributions to electroweak precision observables in the MSSM

abstract:
  The evaluation of the two-loop MSSM-contributions to the electroweak
precision observables M_W and s_w^eff at order(alpha_t^2), order(alpha_t
alpha_b), order(alpha_b^2) is presented. These contributions enter via
Delta(rho), and it is explained in detail how one can retain the true,
non-vanishing value of the MSSM Higgs boson mass M_h in spite of using the
gauge-less limit in the calculation. The numerical results can be sizeable, in
particular for strong squark mixing. By comparing the results in the on-shell
and DR-bar renormalization schemes, the remaining theoretical uncertainty is
found to be small.


title:
Corrections to flat-space particle dynamics arising from space
  granularity

abstract:
  The construction of effective Hamiltonians describing corrections to flat
space particle dynamics arising from the granularity of space at very short
distances is discussed in the framework of an heuristic approach to the
semiclassical limit of loop quantum gravity. After some general motivation of
the subject, a brief non-specialist introduction to the basic tools employed in
the loop approach is presented. The heuristical semiclassical limit is
subsequently defined and the application to the case of photons and spin 1/2
fermions is described. The resulting modified Maxwell and Dirac Hamiltonians,
leading in particular to Planck scale corrections in the energy-momentum
relations, are presented. Alternative interpretations of the results and their
limitations, together with other approaches are briefly discussed along the
text. Three topics related to the above methods are reviewed: (1) The
determination of bounds to the Lorentz violating parameters in the fermionic
sector, obtained from clock comparison experiments.(2) The calculation of
radiative corrections in preferred frames associated to space granularity in
the framework of a Yukawa model for the interactions and (3) The calculation of
synchrotron radiation in the framework of the Myers-Pospelov effective theories
describing Lorentz invariance violations, as well as a generalized approach to
radiation in Planck scale modified electrodynamics. The above exploratory
results show that quantum gravity phenomenology provides observational guidance
in the construction of quantum gravity theories and opens up the possibility of
probing Planck scale physics.


title: Mixed top-bottom squark production at the LHC

abstract:
  We calculate cross sections for mixed stop-sbottom pair production at the
LHC, analogous to single-top production, a weak process involving the
W-t(i)-b(j) vertex. While coupling-suppressed relative to QCD same-flavor
squark pair production, the signal is distinctive due to heavy-flavor tagging
along with a possible same-sign lepton pair in the final state. SUSY
backgrounds can often be suppressed many orders of magnitude by taking
advantage of distinct kinematic differences from the signal. Measuring the rate
of this process would add significant additional information to that gathered
from other SUSY processes. If the stop and sbottom mixings can be determined
elsewhere, stop-sbottom production would provide for a measurement of the weak
squark gauge coupling and super-CKM vertex factor.


title: Two-loop SUSY QCD correction to the gluino pole mass

abstract:
  The pole mass of the gluino is diagrammatically calculated to the two-loop
order in SUSY QCD as a function of the running parameters in the lagrangian,
for the gluino and squarks sufficiently heavier than the quarks. The
O(alpha_s^2) correction shifts the gluino mass by typically 1-2 %, which may be
larger than the expected accuracy of the mass determination at future
colliders.


title:
Path-integral approach in a chiral quark-diquark model to the nucleon
  structure and interactions

abstract:
  We study the structure of the nuclear force by using a path-integral
hadronization approach in a chiral quark-diquark model. After the construction
of the chiral quark-diquark model, we hadronize it to obtain a meson-baryon
Lagrangian. The effective meson-baryon Lagrangian incorporates chiral symmetry
and the composite description of the mesons and baryons. Using the effective
meson-baryon Lagrangian we investigate the structure of the nuclear force in
the simple case of neglecting the axial-vector diquark. It is shown that the
meson-baryon Lagrangian contains two kinds of the nuclear force; the
meson-exchange interaction and a quark-diquark loop interaction. It is also
shown that the quark-diquark loop interaction consists of the scalar and vector
interactions. The properties of these interactions are discussed.


title:
Can the total angular momentum of u-quarks in the nucleon be accessed at
  HERMES?

abstract:
  We investigate the possibility to acquire information on the generalized
parton distribution E and, through a model for E, also on the u-quark total
angular momentum J_u by studying deeply virtual Compton scattering and hard
exclusive rho0 electroproduction on a transversely polarized hydrogen target at
HERMES. It is found that a change in J_u from zero to 0.4 corresponds to a
4\sigma (2\sigma) difference in the calculated transverse target-spin asymmetry
in deeply virtual Compton scattering (rho0 electroproduction), where \sigma is
the total experimental uncertainty.


title: Low-energy photon-photon collisions to two loops revisited

abstract:
  In view of ongoing experimental activities to determine the pion
polarizabilities, we have started to recalculate the available two-loop
expressions in the framework of chiral perturbation theory, because they have
never been checked before. We make use of the chiral Lagrangian at order p^6
now available, and of improved techniques to evaluate the two-loop diagrams.
Here, we present the result for the neutral pions. The cross section for the
reaction gamma+gamma->pi0+pi0 agrees with the earlier calculation within a
fraction of a percent. We present analytic results for the dipole and
quadrupole polarizabilities, and compare the latter with a recent evaluation
from data on gamma+gamma->pi0+pi0.


title:
Pseudoscalar Decay Constants $ f_{D} $ and $ f_{D_s} $ in Lattice QCD
  with Exact Chiral Symmetry

abstract:
  We determine the masses and decay constants of pseudoscalar mesons $ D $, $
D_s $, and $ K $ in quenched lattice QCD with exact chiral symmetry. For 100
gauge configurations generated with single-plaquette action at $ \beta = 6.1 $
on the $ 20^3 \times 40 $ lattice, we compute point-to-point quark propagators
for 30 quark masses in the range $ 0.03 \le m_q a \le 0.80 $, and measure the
time-correlation functions of pseudoscalar and vector mesons. The inverse
lattice spacing $ a^{-1} $ is determined with the experimental input of $ f_\pi
$, while the strange quark bare mass $ m_s a = 0.08 $, and the charm quark bare
mass $ m_c a = 0.80 $ are fixed such that the masses of the corresponding
vector mesons are in good agreement with $ \phi(1020) $ and $ J/\psi(3097) $
respectively. Our results of pseudoscalar-meson decay constants are $ f_K =
152(6)(10) $ MeV, $ f_D = 235(8)(14)$ MeV, and $ f_{D_s} = 266(10)(18) $ MeV.


title: Exploring Complex Phases of the MSSM at Future Colliders

abstract:
  Once Supersymmetry is discovered, exploring the phases of supersymmetric
parameters will be one of the most important tasks of future colliders. We
analyze the possibilities of investigating the phases of the cMSSM via their
effects on the Higgs sector through radiative corrections. Within two benchmark
scenarios we compare the capabilities of the LHC, the ILC and a future gamma
gamma collider.


title:
CP-violating asymmetries in B^0 decays to K^+K^-K_{S(L)}^0 and
  K_S^0K_S^0K_{S(L)}^0

abstract:
  Decay rates and time-dependent and direct CP asymmetries in the decays
$B^0\to K^+K^-K_{S(L)}$ and $K_S K_S K_{S(L)}$ are studied. Resonant and
nonresonant contributions to the three-body decays are carefully investigated.
Nonresonant effects on 2-body and 3-body matrix elements are constrained by QCD
counting rules. The predicted branching ratios are consistent with the data
within the theoretical and experimental errors, though the theoretical central
values are somewhat smaller than the experimental ones. Owing to the presence
of color-allowed tree amplitudes in $B^0\to K^+K^-K_{S(L)}$, this
penguin-dominated mode is subject to a significant tree pollution and the
deviation of the mixing-induced \CP asymmetry from that measured in $B\to
J/\psi K_S$, namely, $\Delta \sin 2\beta_{K^+K^-K_{S(L)}}\equiv \sin
2\beta_{K^+K^-K_{S(L)}}-\sin 2 \beta_{J/\psi K_S}$, can be as large as O(0.10).
In contrast, the $K_SK_SK_{S(L)}$ modes appear theoretically very clean in our
picture with negligible $\Delta\sin 2\beta_{K_SK_SK_{S(L)}}$. Direct CP
asymmetries in $K^+K^-K_{S(L)}$ and $K_S K_S K_{S(L)}$ modes are found to be
very small.


title: Non-factorizable contributions to deep inelastic scattering at large x

abstract:
  We use soft-collinear effective theory (SCET) to study the factorization
properties of deep inelastic scattering in the region of phase space where 1-x
= O(Lambda_{QCD/Q}). By applying a regions analysis to loop diagrams in the
Breit frame, we show that the appropriate version of SCET includes
anti-hard-collinear, collinear, and soft-collinear fields. We find that the
effects of the soft-collinear fields spoil perturbative factorization even at
leading order in the 1/Q expansion.


title: Coupled-channel model for charmonium levels and an option for X(3872)

abstract:
  The effects of charmed meson loops on the spectrum of charmonium are
considered, with special attention paid to the levels above open-charm
threshold. It is found that the coupling to charmed mesons generates a
structure at the D \bar{D}* threshold in the 1++ partial wave. The implications
for the nature of the X(3872) state are discussed.


title: Two-photon width of the Higgs boson

abstract:
  This study investigates the potential of a photon collider for measuring the
two photon partial width times the branching ratio of a light Higgs boson. The
analysis is based on the reconstruction of the Higgs events produced in the
gamma gamma -> h process, followed by Higgs decay into a b bbar pair. A
statistical error of the measurement of the two-photon width times the b bbar
branching ratio of the Higgs boson is found to be 1.7% with an integrated
luminosity of 80 fb^-1 in the high energy part of the spectrum.


title: Diffractive Processes at the LHC

abstract:
  We consider diffractive processes which can be measured at the LHC. Analysis
of diffractive events will give unique information about the high energy
asymptotics of hadron scattering. In semihard diffraction one may study the
partonic structure of the Pomeron. Central Exclusive Diffractive production
provides a possibility to investigate the new particles (Higgs bosons, SUSY
particles,...) in an exceptionally clean environment.


title: Nonequilibrium Effects and Baryogenesis

abstract:
  Possible effects due to nonequilibrium dynamics in the Affleck-Dine mechanism
of baryogenesis are examined. Using the closed-time-path formalism, the quantum
fluctuation and the back reaction of the Affleck-Dine scalar field are
incorporated self-consistently into the dynamical equations of the system. It
is found that such nonequilibrium effects can significantly affect the amount
of baryon asymmetry that can be generated. In particular, it is possible to
generate the observed baryon asymmetry with suitable initial conditions. The
methodology described in this paper as well as some of the results obtained are
quite general, and can be applied to any complex scalar field in a cosmological
background.


title:
Complete electroweak one loop contributions to the pair production cross
  section of MSSM charged and neutral Higgs bosons in e+e- collisions

abstract:
  In this paper, we review the production cross section for charged and neutral
Higgs bosons pairs in $e^{+}e^{-}$ collisions beyond the tree level, in the
framework of the Minimal Supersymmetric Standard Model (MSSM). A complete list
of formulas for all electroweak contributions at the one loop level is given. A
numerical code has been developed in order to compute them accurately and, in
turn, to compare the MSSM Higgs bosons pair production cross sections at tree
level and at the one loop level.


title: Diffractive SUSY particle production at the LHC

abstract:
  We give detailed predictions for diffractive SUSY Higgs boson and top squark
associated productions at the LHC via the exclusive double pomeron exchange
mechanism. We study how the SUSY Higgs cross section and the signal over
background ratio are enhanced as a function of tangent beta in different
regimes. The prospects are particularly promising in the ``anti-decoupling''
regime, which we study in detail. We also give the prospects for a precise
measurement of the top squark mass using the threshold scan of central
diffractive associated top squark events at the LHC.


title: On leptonic decay of a heavy quarkonium with a Higgs-boson emission

abstract:
  A leptonic $(\bar l l)$ decay of a heavy quark-antiquark bound state $T(\bar
QQ)$ with a Higgs-boson $H$ emission is investigated. The applying of the
well-known low-energy theorem to meson-Higgs coupling allows one to estimate
the probability of the decay $T(\bar QQ)\to \bar ll H$. The only a simple
version of the Standard Model extension containing two-Higgs doublet is
considered.


title:
Search for isotensor exotic meson and twist 4 contribution to
  $\gamma^*\gamma\to\rho\rho$

abstract:
  We present a theoretical estimate for the cross-section of exclusive
$\rho^+\rho^-$ and $\rho^0\rho^0$-meson production in two photon collisions
when one of the initial photons is highly virtual. We focus on the discussion
of the twist 4 contributions which are related to the production of an exotic
isospin 2 resonance of two $\rho$ mesons. Our analysis shows that the recent
experimental data obtained by the L3 Collaboration at LEP can be understood as
a signal for the existence of an exotic isotensor resonance with a mass around
$1.5 {\rm GeV}$.


title: Soft-gluon resummation effects on parton distributions

abstract:
  We gauge the impact of soft-gluon resummation on quark distributions by
performing a simple fit of Deep Inelastic Scattering structure function data
using next-to-leading order (NLO) and next-to-leading-logarithmic
(NLL)-resummed coefficient functions. We make use of NuTeV charged-current
data, as well as New Muon Collaboration (NMC) and
Bologna-CERN-Dubna-Munich-Saclay (BCDMS) neutral-current results, which probe
large values of x. Our results suggest that the inclusion of resummation
effects in global fits of parton distributions is both feasible and desirable,
in order to achieve at large x the accuracy goals of the LHC physics program.


title: From dense-dilute duality to self duality in high energy evolution

abstract:
  I describe recent work on inclusion of Pomeron loops in the high energy
evolution. In particular I show that the complete eikonal high energy evolution
kernel must be selfdual.


title: Renormalization Group Evolution of Dirac Neutrino Masses

abstract:
  There are good reasons why neutrinos could be Majorana particles, but there
exist also a number of very good reasons why neutrinos could have Dirac masses.
The latter option deserves more attention and we derive therefore analytic
expressions describing the renormalization group evolution of mixing angles and
of the CP phase for Dirac neutrinos. Radiative corrections to leptonic mixings
are in this case enhanced compared to the quark mixings because the hierarchy
of neutrino masses is milder and because the mixing angles are larger. The
renormalization group effects are compared to the precision of current and
future neutrino experiments. We find that, in the MSSM framework, radiative
corrections of the mixing angles are for large \tan\beta comparable to the
precision of future experiments.


title: Large angle hadron correlations from medium-induced gluon radiation

abstract:
  Final state medium-induced gluon radiation in ultradense nuclear matter is
shown to favor large angle emission when compared to vacuum bremsstrahlung due
to the suppression of collinear gluons. In a simple model of momentum transfers
from the medium to the jet+gluon system the phase space distribution of
non-Abelian bremsstrahlung is examined to first order in opacity. Perturbative
expression for the contribution of the hadronic fragments from medium-induced
gluons to the back-to-back particle correlations is derived. It is found that
in the limit of large jet energy loss gluon radiation determines the yield and
angular distribution of $|\Delta \phi | \geq \frac{\pi}{2}$ di-hadrons to high
transverse momenta $p_{T_2}$ of the associated particles. Clear transition from
enhancement to suppression of the away-side di-hadron correlations is
established at moderate $p_{T_2}$ and its experimentally accessible features
are predicted versus the trigger particle momentum $p_{T_1}$. The measured
away-side correlation function is shown to be sensitive to the broad rapidity
distribution of di-jets and their vacuum and medium-induced acoplanarity.


title:
Problem of the noise-noise correlation function in hot non-Abelian
  plasma

abstract:
  In this work on the basis of Kadomtsev's kinetic fluctuation theory we
present the more general expression for noise-noise correlation function in
effective theory for ultrasoft field modes.


title: Improved measurement of (2 beta+gamma)

abstract:
  We propose to measure the Cabibbo-Kobayashi-Maskawa parameter (2 beta+gamma)
using B^0 decays involving several intermediate states, and describe a general
formalism that applies to a broad class of decays. The main advantage of this
method is that the ratios between the interfering amplitudes can be measured
without requiring external input. In addition, discrete ambiguities are
resolved.


title: A variational method from the variance of energy

abstract:
  A variational method is studied based on the minimum of energy variance. The
method is tested on exactly soluble problems in quantum mechanics, and is shown
to be a useful tool whenever the properties of states are more relevant than
the eigenvalues. In quantum field theory the method provides a consistent
second order extension of the gaussian effective potential.


title: Sudakov Expansions and Top Quark Physics at LHC

abstract:
  We review some peculiar features of Sudakov expansions in the calculation of
electroweak radiative corrections in the MSSM at high energy. We give specific
examples and consider in particular the process b g -> t W of single top quark
production relevant for the top quark physics programme at LHC.


title:
On the evaluation of a certain class of Feynman diagrams in x-space:
  Sunrise-type topologies at any loop order

abstract:
  We review recently developed new powerful techniques to compute a class of
Feynman diagrams at any loop order, known as sunrise-type diagrams. These
sunrise-type topologies have many important applications in many different
fields of physics and we believe it to be timely to discuss their evaluation
from a unified point of view. The method is based on the analysis of the
diagrams directly in configuration space which, in the case of the sunrise-type
diagrams and diagrams related to them, leads to enormous simplifications as
compared to the traditional evaluation of loops in momentum space. We present
explicit formulae for their analytical evaluation for arbitrary mass
configurations and arbitrary dimensions at any loop order. We discuss several
limiting cases of their kinematical regimes which are e.g. relevant for
applications in HQET and NRQCD.


title: Global Analyses of Nuclear PDFs

abstract:
  A brief overview of the global DGLAP analyses of the nuclear parton
distribution functions is given. Although all the current global nPDF sets
describe $R_{F_2}^A(x,Q^2)$ well in the large-$x$ region where the data exist,
variations between their parton distributions can be substantial.


title: Higher-Order Corrections in Threshold Resummation

abstract:
  We extend the threshold resummation exponents G^N in Mellin-N space to the
fourth logarithmic (N^3LL) order collecting the terms alpha_s^2 (alpha_s ln
N)^n to all orders in the strong coupling constant as. Comparing the results to
our previous three-loop calculations for deep-inelastic scattering (DIS), we
derive the universal coefficients B_q and B_g governing the final-state jet
functions to order alpha_s^3, extending the previous quark and gluon results by
one and two orders. A curious relation is found at second order between these
quantities, the splitting functions and the large-angle soft emissions in
Drell-Yan type processes. We study the numerical effect of the N^3LL
corrections using both the fully exponentiated form and the expansion of the
coefficient function in towers of logarithms.


title: Next-to-leading order corrections to Wt production and decay

abstract:
  We present the results of a next-to-leading order calculation of Wt
production, including the decays of both the top quark and the W boson. The
effects of radiation in the decay of the top quark are also included. The
separation of diagrams which appear in the real corrections, into singly- and
doubly-resonant contributions, is performed using a b-jet veto which is
motivated by the use of the bottom quark distribution function. We find that,
for a choice of scale which is suitable for this approach, the QCD corrections
are very mild and only change the cross section by up to 10% at the LHC,
depending on the severity of the b-jet veto. When further cuts are applied,
applicable for a Higgs boson search in the H->WW channel, we find that the
radiative effects greatly decrease the number of background events expected
from this process. In addition, the shapes of relevant distributions can be
significantly changed at next-to-leading order.


title: MSGUTs from Germ to Bloom : towards Falsifiability and Beyond

abstract:
  We review the development of minimal renormalizable SO(10) Susy GUTs. Using
our $SO(10) \to G_{Pati-Salam} $ label decomposition we calculated the complete
GUT scale spectra and couplings and the threshold effects therefrom. The
corrections to $\alpha_G, Sin^2{\theta}_W $ and $ M_X $ are sensitive functions
of the single parameter $\xi$ that controls symmetry breaking and slow funtions
of the others. Scans of the parameter space to identify regions compatible with
gauge unification are shown. The tight connection between the phenomenology of
neutrino oscillations and exotic ($\Delta B\neq 0 $) processes predicted by
Susy SO(10) GUTs is discussed in the context of the recent successful fits of
all available fermion mass/mixing data using the ${\bf{10 \oplus {\bar
{126}}}}$ Higgs representations and Type I/II seesaw mechanisms for neutrino
mass. We emphasize that {\it{the true output of these calculations should be
regarded as the unitary matrices that specify the orientation of the embedding
of the MSSM within the MSGUT}}. Fermion Mass fitting constraints combined with
GUT spectra can falsify/constrain the MSGUT and its near relatives. An initial
survey indicates that Type I Seesaw neutrino masses dominate Type II and both
are too small in the perturbative MSGUT even when the mixing and mass squared
splitting ratios are as per data. This motivates a detailed study of the MSGUT
constraints using the outputs of the fitting of fermion data, as well as
consideration of modifications/extensions of the MSGUT scenario.


title: Effects of Finite Top Lifetime at the Top-Antitop Threshold

abstract:
  In this talk electroweak corrections related to the finite top quark lifetime
to the total top pair threshold e+e- cross section at NNLL order are discussed.
We include the absorptive parts in electroweak matching conditions of the NRQCD
operators related to the top decay and use the optical theorem. Gauge
invariance is maintained. The corrections lead to ultraviolet phase space
divergences and NLL mixing effects. The corrections can amount to several
percent and are phenomenologically relevant.


title:
Leading twist contribution to color singlet $\chi_{c0,2}\to\omega\omega$
  decays

abstract:
  In this paper the leading twist contribution to $\chi_{c0,2}\to\omega\omega$
decays in the color singlet approximation is considered. It is shown, that the
predictions for $\Br(\chi_0\to\omega\omega)$ is in a good agreement with the
experimental data, while $\Br(\chi_{c2}\to\omega\omega)$ differs from the
experiment significantly.


title: CPT Violation: What and where to look for

abstract:
  In this review I classify the possible ways of CPT violation, and I describe
briefly their phenomenology, in both terrestrial and astrophysical experiments,
including antimatter factories, neutral mesons and neutrinos, and discuss the
various sensitivities. I also pay attention to disentangling genuine
quantum-gravity induced CPT violation from `fake' violation due to ordinary
matter effects. A particularly interesting situation arises when the breaking
of CPT invariance is through unitarity violations, in the sense of the matter
theory being viewed as an effective field theory, entangled with decoherening
quantum gravity ``environments''. In such a case the quantum mechanical CPT
operator is ill defined due to another mathematical theorem, and one has novel
effects associated with CPT Violating modifications of Einstein-Podolsky-Rosen
type correlations of entangled meson states in B and phi meson factories.


title:
Lepton Flavour Violating Leptonic/Semileptonic Decays of Charged Leptons
  in the Minimal Supersymmetric Standard Model

abstract:
  We consider the leptonic and semileptonic (SL) lepton flavour violating (LFV)
decays of the charged leptons in the minimal supersymmetric standard model
(MSSM). The formalism for evaluation of branching fractions for the SL LFV
charged-lepton decays with one or two pseudoscalar mesons, or one vector meson
in the final state, is given. Previous amplitudes for the SL LFV charged-lepton
decays in MSSM are improved, for instance the $\gamma$-penguin amplitude is
corrected to assure the gauge invariance. The decays are studied not only in
the model-independent formulation of the theory in the frame of MSSM, but also
within the frame of the minimal supersymmetric SO(10) model within which the
parameters of the MSSM are determined. The latter model gives predictions for
the neutrino-Dirac Yukawa coupling matrix, once free parameters in the model
are appropriately fixed to accommodate the recent neutrino oscillation data.
Using this unambiguous neutrino-Dirac Yukawa couplings, we calculate the LFV
leptonic and SL decay processes assuming the minimal supergravity scenario. A
very detailed numerical analysis is done to constrain the MSSM parameters.
Numerical results for SL LFV processes are given, for instance for tau -> e
(mu) pi0, tau -> e (mu) eta, tau -> e (mu) eta', tau -> e (mu) rho0, tau -> e
(mu) phi, tau -> e (mu) omega, etc.


title: Novel Supersymmetric SO(10) Seesaw Mechanism

abstract:
  We propose a new seesaw mechanism for neutrino masses within a class of
supersymmetric SO(10) models with broken D-parity. It is shown that in such
scenarios the B-L scale can be as low as TeV without generating inconsistencies
with gauge coupling unification nor with the required magnitude of the light
neutrino masses. This leads to a possibly light new neutral gauge boson as well
as relatively light quasi-Dirac heavy leptons. These particles could be at the
TeV scale and mediate lepton flavour and CP violating processes at appreciable
levels.


title:
Predicting neutrino parameters from SO(3) family symmetry and
  quark-lepton unification

abstract:
  We show how the neutrino mixing angles and oscillation phase can be predicted
from tri-bimaximal neutrino mixing, corrected by charged lepton mixing angles
which are related to quark mixing angles via quark-lepton unification. The
tri-bimaximal neutrino mixing can naturally originate from the see-saw
mechanism via constrained sequential dominance (CSD), where CSD can result from
the vacuum alignment of a non-Abelian family symmetry such as SO(3). We
construct a realistic model of quark and lepton masses and mixings based on
SO(3) family symmetry with quark-lepton unification based on the Pati-Salam
gauge group. The atmospheric angle is predicted to be approximately maximal
$\theta_{23}= 45^\circ$, corrected by the quark mixing angle
$\theta_{23}^{\mathrm{CKM}}\approx 2.4^\circ$, with the correction controlled
by an undetermined phase in the quark sector. The solar angle is predicted by
the tri-bimaximal complementarity relation: $\theta_{12}+
\frac{1}{\sqrt{2}}\frac{\theta_{\mathrm{C}}}{3} \cos (\delta - \pi) \approx
35.26^\circ $, where $\theta_{\mathrm{C}}$ is the Cabibbo angle and $\delta$ is
the neutrino oscillation phase. The reactor angle is predicted to be
$\theta_{13} \approx \frac{1}{\sqrt{2}}\frac{\theta_{\mathrm{C}}}{3}\approx
3.06^\circ$. The MNS neutrino oscillation phase $\delta$ is predicted in terms
of the solar angle to be $\cos (\delta - \pi) \approx (35.26^\circ -
\theta_{12}^\circ)/3.06^\circ $. These predictions can all be tested by future
high precision neutrino oscillation experiments, thereby probing the nature of
high energy quark-lepton unification.


title: Spectra of neutrinos from dark matter annihilations

abstract:
  We study the fluxes of neutrinos from annihilations of dark matter particles
in the Sun and the Earth. We give the spectra of all neutrino flavors for the
main known annihilation channels: nu-antinu, b-bbar, tau-taubar, c-cbar, light
quarks, ZZ, W^+W^-. We present the appropriate formalism for computing the
combined effect of oscillations, absorptions, nu_tau-regeneration. Total rates
are modified by an O(0.1--10) factor, comparable to astrophysical
uncertainties, that instead negligibly affect the spectra. We then calculate
different signal topologies in neutrino telescopes: through-going muons,
contained muons, showers, and study their capabilities to discriminate a dark
matter signal from backgrounds. We finally discuss how measuring the neutrino
spectra can allow to reconstruct the fundamental properties of the dark matter:
its mass and its annihilation branching ratios.


title: Soft-gluon expansions through NNNLO

abstract:
  I present universal master formulas for soft-gluon corrections to
hard-scattering cross sections through next-to-next-to-next-to-leading order
(NNNLO). I also briefly discuss applications to some processes where these
corrections enhance the cross section and decrease the scale dependence.


title:
Probing nucleon strange asymmetry from charm production in neutrino deep
  inelastic scattering

abstract:
  We propose a means to detect the nucleon strange quark-antiquark asymmetry,
which is predicted as a non-perturbative effect, but still unchecked directly
by available experiments. The difference for the $D(c\bar{q})$ and
$\bar{D}(\bar{c}q)$ meson production cross sections in neutrino and
antineutrino induced charged current deep inelastic scattering is illustrated
to be sensitive to the nucleon strange asymmetry. Prospect is given and the
effect due to the light quark fragmentation is also discussed for the
extraction of the strange asymmetry in future experiments.


title: The Renormalization-group Method Applied to Non-equilibrium Dynamics

abstract:
  We review the renormalization group method applied to non-equilibrium
dynamics by tracing the way how the hydrodynamic equations can be derived as
reduced dynamics of the Boltzmann equation as a typical example.


title:
Synthesis of DGLAP and total resummation of leading logarithms for the
  non-singlet spin structure function g_1

abstract:
  The explicit expressions for the non-singlet DIS structure function g_1 at
small $x$ are obtained by resumming the leading logarithmic contributions. The
role played by the fits for the initial parton densities currently used in the
DGLAP on the small-x behavior of the non-singlet g_1 is discussed. Explicit
expressions combining DGLAP with our results are presented.


title: Anisotropic flow of strange particles at RHIC

abstract:
  Space-time picture of the anisotropic flow evolution in Au+Au collisions at
BNL RHIC is studied for strange hadrons within the microscopic quark-gluon
string model. The directed flow of both mesons and hyperons demonstrates wiggle
structure with the universal antiflow slope at |y| < 2 for minimum bias events.
This effect increases as the reaction becomes more peripheral. The development
of both components of the anisotropic flow is closely related to particle
freeze-out. Hadrons are emitted continuously, and different hadronic species
are decoupled from the system at different times. These hadrons contribute
differently to the formation and evolution of the elliptic flow, which can be
decomposed onto three components: (i) flow created by hadrons emitted from the
surface at the onset of the collision; (ii) flow produced by jets; (iii)
hydrodynamic flow. Due to these features, the general trend in elliptic flow
formation is that the earlier mesons are frozen, the weaker their elliptic
flow. In contrast, baryons frozen at the end of the system evolution have
stronger v2.


title: Radiative Corrections to Democratic Lepton Mixing

abstract:
  A new ansatz of democratic lepton mixing is proposed at the GUT scale and the
radiative corrections to its phenomenological consequences are calculated at
the electroweak scale. We demonstrate that it is possible to obtain the
experimentally favored results for both neutrino masses and lepton flavor
mixing angles from this ansatz, provided the neutrino Yukawa coupling matrix
takes a specific nontrivial pattern. The seesaw threshold effects play a
significant role in the running of relevant physical quantities.


title: The Interval Approach to Braneworld Gravity

abstract:
  Gravity in five-dimensional braneworld backgrounds may exhibit extra scalar
degrees of freedom with problematic features, including kinetic ghosts and
strong coupling behavior. Analysis of such effects is hampered by the standard
heuristic approaches to braneworld gravity, which use the equations of motion
as the starting point, supplemented by orbifold projections and junction
conditions. Here we develop the interval approach to braneworld gravity, which
begins with an action principle. This shows how to implement general
covariance, despite allowing metric fluctuations that do not vanish on the
boundaries. We reproduce simple Z_2 orbifolds of gravity, even though in this
approach we never perform a Z_2 projection. We introduce a family of ``straight
gauges'', which are bulk coordinate systems in which both branes appear as
straight slices in a single coordinate patch. Straight gauges are extremely
useful for analyzing metric fluctations in braneworld models. By explicit gauge
fixing, we show that a general AdS_5/AdS_4 setup with two branes has at most a
radion, but no physical ``brane-bending'' modes.


title: Algebraic Approach to Bare Nucleon Matrix Elements

abstract:
  An algebraic method for evaluating bare nucleon matrix elements of quark
operators is proposed. Thereby, bare nucleon matrix elements are traced back to
vacuum matrix elements. The method is similar to the soft pion theorem. Matrix
elements of two-quark, four-quark and six-quark operators inside the bare
nucleon are considered.


title: Neutrino mass and mixing parameters: A short review

abstract:
  We present a brief review of the current status of neutrino mass and mixing
parameters, based on a comprehensive phenomenological analysis of neutrino
oscillation and non-oscillation searches, within the standard three-neutrino
mixing framework.


title: The Color Glass Condensate and hadron production in the forward region

abstract:
  We consider one loop corrections to single inclusive particle production in
parton-nucleus scattering at high energies, treating the target nucleus as a
Color Glass Condensate. We prove by explicit computation that in the leading
log Q^2 approximation, these corrections lead to collinear factorization and
DGLAP evolution of the projectile parton distribution and hadron fragmentation
functions. At leading logarithmic level, and in single-inclusive cross
sections, only two-point functions of Wilson lines in the adjoint and
fundamental representations (Mueller's dipoles) arise, which can be obtained
from the solution of the JIMWLK equations. The application of our results to
forward-rapidity production at RHIC energy shows that, in general, recoil
effects are large and that the forward rapidity region at RHIC is rather
different from the central region at LHC, despite comparable gluon densities in
the target. We show that both the quantum x-evolution of the high-density
target as well as the DGLAP Q^2-evolution of the parton distribution and
fragmentation functions are clearly seen in the BRAHMS data. This provides
additional strong evidence for the Color Glass Condensate at RHIC.


title: Off-shell scattering amplitudes in the double-logarithmic approximation

abstract:
  When scattering amplitudes are calculated in the double-logarithmic
approximation, it is possible to relate the double-logarithmic on-shell and
off-shell amplitudes. Explicit relations are obtained for scattering amplitudes
in QED, QCD, and the ElectroWeak Standard Model. The off-shell amplitudes are
considered in the hard and the Regge kinematic limits. We compare our results
in both the Feynman and Coulomb gauges.


title:
The $H^\pm W^\mp Z^0$ vertex and single charged Higgs boson production
  via $WZ$ fusion at the Large Hadron Collider

abstract:
  There is a variety of new physics scenarios which deduce extended Higgs
sectors in the low energy effective theory. The coupling of a singly-charged
Higgs boson ($H^\pm$) with weak gauge bosons, $H^\pm W^\mp Z^0$, directly
depends on the global symmetry structure of the model, so that its experimental
determination can be useful to test each scenario. We discuss predictions on
this coupling in several models, such as the model with additional real and
complex triplets, the Littlest Higgs model, the two Higgs doublet model and the
minimal supersymmetric standard model. In order to measure the $H^\pm W^\mp
Z^0$ coupling we consider single $H^\pm$ production via the $WZ$ fusion
mechanism at the CERN Large Hadron Collider. The production rate is
hierarchically different among these models, so that this process can be useful
to explore new physics scenarios.


title:
QCD Analytic Perturbation Theory. From integer powers to any power of
  the running coupling

abstract:
  We propose a new generalized version of the QCD Analytic Perturbation Theory
of Shirkov and Solovtsov for the computation of higher-order corrections in
inclusive and exclusive processes. We construct non-power series expansions for
the analytic images of the running coupling and its powers for any fractional
(real) power and complete the linear space of these solutions by constructing
the index derivative. Using the Laplace transformation in conjunction with
dispersion relations, we are able to derive at the one-loop order closed-form
expressions for the analytic images in terms of the Lerch function. At the
two-loop order we provide approximate analytic images of products of powers of
the running coupling and logarithms--typical in higher-order perturbative
calculations and when including evolution effects. Moreover, we supply explicit
expressions for the two-loop analytic coupling and the analytic images of its
powers in terms of one-loop quantities that can strongly simplify two-loop
calculations. We also show how to resum powers of the running coupling while
maintaining analyticity, a procedure that captures the generic features of
Sudakov resummation. The algorithmic rules to obtain analytic coupling
expressions within the proposed Fractional Analytic Perturbation Theory from
the standard QCD power-series expansion are supplied ready for phenomenological
applications and numerical comparisons are given for illustration.


title: A Unified Framework for Symmetry Breaking in SO(10)

abstract:
  A new SO(10) unified model is proposed based on a one step breaking of SO(10)
to the Standard Model gauge group $SU(3)\times SU(2)\times U(1)_Y$ using a
single 144 of Higgs. The symmetry breaking occurs when the SU(5) 24-plet
component of 144 develops a vacuum expectation value. Further, it is possible
to obtain from the same 144 a light Higgs doublet necessary for electro-weak
symmetry breaking using recent ideas of string vacua landscapes and fine
tuning. Thus the breaking of SO(10) down to $SU(3)_C\times U(1)_{em}$ can be
accomplished with a single Higgs. We analyze this symmetry breaking pattern in
the nonsupersymmetric as well as in the supersymmetric SO(10) model.In this
scenario masses of the quarks and leptons arise via quartic couplings. We show
that the resulting mass pattern is consistent with experimental data, including
neutrino oscillations. The model represents an alternative to the currently
popular grand unified scenarios.


title: Smoking-gun signatures of little Higgs models

abstract:
  Little Higgs models predict new gauge bosons, fermions and scalars at the TeV
scale that stabilize the Higgs mass against quadratically divergent one-loop
radiative corrections. We categorize the many little Higgs models into two
classes based on the structure of the extended electroweak gauge group and
examine the experimental signatures that identify the little Higgs mechanism in
addition to those that identify the particular little Higgs model. We find that
by examining the properties of the new heavy fermion(s) at the LHC, one can
distinguish the structure of the top quark mass generation mechanism and test
the little Higgs mechanism in the top sector. Similarly, by studying the
couplings of the new gauge bosons to the light Higgs boson and to the Standard
Model fermions, one can confirm the little Higgs mechanism and determine the
structure of the extended electroweak gauge group.


title:
Nucleon and hadron structure changes in the nuclear medium and impact on
  observables

abstract:
  We review the effect of hadron structure changes in a nuclear medium using
the quark-meson coupling (QMC) model, which is based on a mean field
description of non-overlapping nucleon (or baryon) bags bound by the
self-consistent exchange of scalar and vector mesons. This approach leads to
simple scaling relations for the changes of hadron masses in a nuclear medium.
It can also be extended to describe finite nuclei, as well as the properties of
hypernuclei and meson-nucleus deeply bound states. It is of great interest that
the model predicts a variation of the nucleon form factors in nuclear matter.
We also study the empirically observed, Bloom-Gilman (quark-hadron) duality.
  Other applications of the model include subthreshold kaon production in heavy
ion collisions, D and D-bar meson production in antiproton-nucleus collisions,
and J/Psi suppression. In particular, the modification of the D and D-bar meson
properties in nuclear medium can lead to a large J/Psi absorption cross
section, which explains the observed J/Psi suppression in relativistic heavy
ion collisions.


title:
Next-to-leading order QCD corrections to single-inclusive hadron
  production in transversely polarized p-p and pbar-p collisions

abstract:
  We present a calculation of the next-to-leading order QCD corrections to the
partonic cross sections contributing to single-inclusive high-p_T hadron
production in collisions of transversely polarized hadrons. We use a recently
developed projection technique for treating the phase space integrals in the
presence of the cos(2Phi) azimuthal-angular dependence associated with
transverse polarization. Our phenomenological results show that the double-spin
asymmetry A_TT^pi for neutral-pion production is expected to be very small for
polarized pp scattering at RHIC and could be much larger for the proposed
experiments with an asymmetric pbar-p collider at the GSI


title: B_s \to \rho(\omega) K^* with Perturbative QCD approach

abstract:
  $B_s \to \rho(\omega) K^{\ast}$ are useful to determine the $B_s$
distribution amplitude, as well as constrain the CKM phase angle $\alpha$. We
study these decays within the Perturbative QCD (PQCD) picture. In this
approach, we calculate factorizable, non-factorizable, as well as annihilation
diagrams. We find the branching ratio for $B_s \to \rho^+ K^{*-}$ is big to
order $10^{-5}$, we also find there's large direct CP violation in $B_s(\bar
B_s) \to \rho^0(\omega) \bar K^{*0}(K^{*0})$. Our predictions are consistent
with those from other methods and current experiments.


title: New formulation of (g-2)_\mu hadronic contribution

abstract:
  In frames of agreement to consider the annihilation of electron-positron pair
to hadrons cross section to be including the virtual photon polarization
effects a new formulation of hadron contribution to muon anomalous magnetic
moment is suggested. It consists in using the experimentally observed cross
section converted with the known kernels. The lowest order kernel remains to be
the same but some modification of radiative corrected kernel is needed. The
explicit form of this new kernel is given.
  We estimate the accuracy of new formulation on the level \delta
a^{hadr}_\mu/a^{hadr}_\mu \sim 10^{-5}.


title:
Two loop renormalization of the magnetic coupling and non-perturbative
  sector in hot QCD

abstract:
  The goal of this paper is two-fold. The first aim is to present a detailed
version of the computation of the two-loop renormalization of the magnetic
coupling in hot QCD. The second is to compare with lattice simulations the
string tension of a spatial Wilson loop using the result of our two-loop
computation


title:
Quark model description of quasi-elastic pion knockout from the proton
  at JLAB

abstract:
  The interference term between s- and t-pole contributions to the p(e,e' pi+)n
cross section is evaluated on the basis of the constituent quark model. It is
shown that the contribution of baryon s-poles can be modeled by a nonlocal
extension of the Kroll-Rudermann contact term. This contribution is in a
destructive interference with the pion t-pole that is essential to improve the
description of recent JLab data at the invariant mass W=1.95 GeV. Some
predictions are made for a new JLab measurement at higher values W=2.1-2.3 GeV
and Q2 centered at 1.6 and 2.45 GeV2/c2.


title: Leptogenesis and Dark Matter related ?

abstract:
  We investigate the possibility that dark matter and the baryon asymmetry of
the Universe are generated by the same mechanism, following an idea initially
proposed by V.A. Kuzmin and recently discussed by R. Kitano and I. Low. In our
model, based on a left-right extension of the Standard Model, the baryon
asymmetry is generated through leptogenesis and dark matter is made of relic
stable right-handed neutrinos with mass ~ few GeV. Constraints on the model
imply that this form of dark matter would unfortunately escape detection.


title: Freeze-out of strange hadrons at RHIC

abstract:
  The production and freeze-out conditions of strange particles, produced in
Au+Au collisions at RHIC energies, are studied within microscopic transport
model. The system of final particles can be represented as a core, containing
the particles which are still interacting with each other, and a halo, in which
the particles have already decoupled from the system. In microscopic
calculations hadrons are continuously emitted from the whole reaction volume.
At RHIC, however, significant fractions of both mesons and baryons are emitted
from the surface region within the first two fm/c. Different species decouple
at different times. Strange mesons (kaons and $\phi$) are frozen at earlier
times and, therefore, can probe earlier stages of the reaction.


title: B-> rho pi, rho rho, pi pi: hunting for alpha

abstract:
  We determine the domains of the values of unitarity triangle angle alpha,
allowed by the charmless strangeless B_d (\bar B_d) decays.


title: Low energy hadronic contribution to the QED vacuum polarization

abstract:
  Recent improvements in the low energy e+e- annihilation data and their
influence on the determination of the hadronic contribution to the running of
the QED fine structure constant at m_Z are discussed. Using CMD-2 and KLOE
measurements in the rho region we obtain Delta alpha(5)_had(s) = 0.02758 +/-
0.00035 at s = m_Z^2.


title: Relativistic effects in the processes of heavy quark fragmentation

abstract:
  In the framework based on the quasipotential method and relativistic quark
model a new covariant expression for the heavy quark fragmentation amplitude to
fragment into the pseudoscalar and vector S-wave heavy mesons is obtained. It
contains all possible relativistic corrections including the terms connected
with the transformation law of the bound state wave function to the reference
frame of the moving meson. Relativistic corrections of order {\bf p}^2/m^2 to
the heavy quark fragmentation distributions into (\bar c c), (\bar b c) and
(\bar b b) states are calculated as functions of the longitudinal momentum
fraction z and the transverse momentum p_T relative to the jet axis.


title: Survival before annihilation in Psi-prime decays

abstract:
  We extend the simple scenario for $\Psi'$ decays suggested a few years ago.
The $c\bar c$ pair in the $\Psi'$ does not annihilate directly into three
gluons but rather survives before annihilating. An interesting prediction is
that a large fraction of all $\Psi'$ decays could originate from the $\Psi' \to
\eta_{c} (3\pi)$ channel which we urge experimentalists to identify. Our model
solves the problem of the apparent hadronic excess in $\Psi'$ decays as well as
the $\rho\pi$ puzzle since, in our view, the two-body decays of the $\Psi'$ are
naturally of electromagnetic origin. Further tests of this picture are
proposed, e.g. $J/\Psi \to b_{1}\eta$.


title: Extraction of polarized parton densities from polarized DIS and SIDIS

abstract:
  We present results on the quark and gluon polarization in the nucleon
obtained in a combined next to leading order analysis to the available
inclusive and semi-inclusive polarized deep inelastic scattering data.


title: QCD corrections to the electroproduction of hadrons with high pT

abstract:
  We compute the order alpha_s^2 corrections to the one particle inclusive
electroproduction cross section of hadrons with non vanishing transverse
momentum. We compare our results with H1 data on forward production of pi^0,
and conclude that the data is well described by the DGLAP approach. within the
theoretical uncertainties.


title: Probing Color Response - Wakes in a Color Plasma

abstract:
  The wake induced in a hot QCD medium by a high momentum parton (jet
precursor) is calculated in the framework of linear response theory. Two
different scenarios are discussed: a weakly coupled quark gluon plasma (pQGP)
as described by hard-thermal loop (HTL) perturbation theory and a strongly
cupled QGP (sQGP) with the properties of a quantum liquid. In the latter case
the wake could exhibit a pronounced Mach cone structure. This physical
mechanism could be important for the understanding of preliminary data from the
PHENIX and STAR experiments at RHIC on the angular distribution of low-pt
secondaries stemming from the away-side jet which indicate maxima at
$\Delta\phi=\pi \pm 1.1$.


title: Precise predictions for SUSY processes at the ILC

abstract:
  Recent high precision calculations for production processes of the SUSY
particles at the next linear collider are reviewed. Special attention is paid
to the input parameter definition. Numerical results for the SPS1a' benchmark
point as proposed in the SPA project, are presented.


title: What is Renormalization?

abstract:
  "Preprint" of paper from 1989 that wasn't arxiv'ed at the time. Abstract: Our
understanding of quantum field theories, and, in particular, of renomalization
has changed radically in recent years; renormalization is no longer a deeply
mysterious procedure for hiding embarrassing infinities. This talk is a
non-technical presentation of modern attitudes towards renormalization, and
their implications (both theoretical and experimental) for quantum theories of
electromagnetic, strong, and weak interactions.


title: Vector Meson Production in Ultraperipheral Heavy Ion Collisions

abstract:
  The ultraperipheral heavy ion collisions (UPC's) are an important alternative
to study the QCD dynamics until the next generation of $e^+e^-/ ep / eA $
colliders become reality. Due to the coherent action of all the protons in the
nucleus, the electromagnetic field is very strong and the resulting flux of
equivalent photons is large, which allows to study two-photon as well as
photonuclear interactions at high energies. In this paper we present a brief
review of the vector meson production in UPC's at high energies using the QCD
color dipole approach to describe their photonuclear production and the
perturbative QCD Pomeron (BFKL dynamics) to describe the double meson
production in photon-photon process. Predictions for rates and integrated cross
sections are presented for energies of RHIC and LHC.


title: Test of FSR in the process $e^+e^-\to\pi^+\pi^-\gamma$ at DA$\Phi$NE

abstract:
  In this paper we consider the possibility to test the FSR model in the
reaction $e^+e^-\to\pi^+\pi^-\gamma$ at DA$\Phi$NE. We propose to consider the
low $Q^2$ region ($Q^2$ is the invariant mass squared of the di-pion system) to
study the different models describing $gamma^*\to\pi^+\pi^-\gamma$ interaction.
As illustration we compare the scalar QED and Resonance Perturbation Theory
prediction for the $e^+e^-\to\pi^+\pi^-\gamma$ cross section. We also consider
the contribution coming from the $\phi$ direct decay
($\phi\to\pi^+\pi^-\gamma$). We find the low $Q^2$ region is sensitive to FSR
models.


title: Modelling Drell-Yan pair production in pbar-p

abstract:
  We predict the triple differential cross section of the unpolarized Drell-Yan
process at sqrt(S)=6 GeV. The model incorporates primordial parton transverse
momentum and quark off-shellness effects caused by the initial state
interaction.


title: Six-Dimensional Gauge Theory on the Chiral Square

abstract:
  We construct gauge theories in two extra dimensions compactified on the
chiral square, which is a simple compactification that leads to chiral fermions
in four dimensions. Stationarity of the action on the boundary specifies the
boundary conditions for gauge fields. Any six-dimensional gauge field
decomposed in Kaluza-Klein modes includes a tower of heavy spin-1 particles
whose longitudinal polarizations are linear combinations of the
extra-dimensional components, and a tower of heavy spin-0 particles
corresponding to the orthogonal combinations. These linear combinations depend
on the Kaluza-Klein numbers, and are independent of the gauge fixing. If the
gauge symmetry is broken by the vacuum expectation value of a six-dimensional
scalar, at each Kaluza-Klein level three spinless fields in the adjoint
representation mix to provide the longitudinal polarization of the spin-1 mode,
leaving the orthogonal states as two spin-0 particles. We derive the
interactions of the Kaluza-Klein modes for generic gauge theories, laying the
groundwork for the Standard Model in two universal extra dimensions, and more
generally for future model building and phenomenological studies.


title: Minimal Flavor Violation in the Lepton Sector

abstract:
  We extend the notion of Minimal Flavor Violation to the lepton sector. We
introduce a symmetry principle which allows us to express lepton flavor
violation in the charged lepton sector in terms of neutrino masses and mixing
angles. We explore the dependence of the rates for flavor changing radiative
charged lepton decays (ell(i) -> ell(j) + gamma) and mu-to-e conversion in
nuclei on the scales for total lepton number violation, lepton flavor violation
and the neutrino masses and mixing angles. Measurable rates are obtained when
the scale for total lepton number violation is much larger than the scale for
lepton flavor violation.


title: Slepton Mass Measurements at the LHC

abstract:
  We first discuss the motivation for measuring slepton masses at the LHC,
emphasizing their importance for cosmology. Next we investigate the possibility
of making slepton mass determinations at the LHC in neutralino decays. We
demonstrate that by studying the shape of the dilepton invariant mass
distribution in the decay neutralino_2 -> neutralino_1 + l^+ + l^-, one can
determine whether the slepton is real or virtual. Furthermore, in case of
virtual sleptons, it is possible to bound the slepton mass within a limited
range. We conclude by discussing future avenues for investigation.


title: Collider Signatures of Axino and Gravitino Dark Matter

abstract:
  The axino and the gravitino are extremely weakly interacting candidates for
the lightest supersymmetric particle (LSP). We demonstrate that either of them
could provide the right amount of cold dark matter. Assuming that a charged
slepton is the next-to-lightest supersymmetric particle (NLSP), we discuss how
NLSP decays into the axino/gravitino LSP can provide evidence for
axino/gravitino dark matter at future colliders. We show that these NLSP decays
will allow us to estimate the value of the Peccei-Quinn scale and the axino
mass if the axino is the LSP. In the case of the gravitino LSP, we illustrate
that the gravitino mass can be determined. This is crucial for insights into
the mechanism of supersymmetry breaking and can lead to a microscopic
measurement of the Planck scale.


title: Final results for the SM Higgs-boson production at the Photon Collider

abstract:
  Feasibility of the precise measurement of the SM Higgs-boson production cross
section gamma+gamma->h->b+bbar at the Photon Collider is studied in detail for
M_h=120-160 GeV. All relevant experimental and theoretical issues, which could
affect the measurement, are taken into account. The study is based on the
realistic gamma-gamma luminosity spectra simulation. The heavy-quark background
gamma+gamma->Q+Qbar(+g) is estimated using the NLO QCD results. Other
background processes, which were neglected in earlier analyses, are also
studied: gamma+gamma->W+W, gamma+gamma->tau+tau and light-quark pair production
gamma+gamma->q+qbar. The contribution from the so-called overlaying events,
gamma+gamma->hadrons, is taken into account. The non-zero beam crossing angle
and the finite size of colliding bunches are included in the event generation.
The detector simulation and realistic b-tagging are used. Criteria of event
selection are optimized separately for each considered Higgs-boson mass. In
spite of the significant background contribution and deterioration of the
invariant mass resolution due to overlaying events, precise measurement of the
Higgs-boson production cross section is still possible. For the Standard-Model
Higgs boson with mass of 120 to 160 GeV the corresponding partial width
Gamma(h->gamma+gamma)BR(h->b+bbar) can be measured with a statistical accuracy
of 2.1-7.7% after one year of the Photon Collider running. The systematic
uncertainties of the measurement are estimated to be of the order of 2%.


title: Bootstrapping Multi-Parton Loop Amplitudes in QCD

abstract:
  We present a new method for computing complete one-loop amplitudes, including
their rational parts, in non-supersymmetric gauge theory. This method merges
the unitarity method with on-shell recursion relations. It systematizes a
unitarity-factorization bootstrap approach previously applied by the authors to
the one-loop amplitudes required for next-to-leading order QCD corrections to
the processes e^+e^- -> Z,\gamma^* -> 4 jets and pp -> W + 2 jets. We
illustrate the method by reproducing the one-loop color-ordered five-gluon
helicity amplitudes in QCD that interfere with the tree amplitude, namely
A_{5;1}(1^-,2^-,3^+,4^+,5^+) and A_{5;1}(1^-,2^+,3^-,4^+,5^+). Then we describe
the construction of the six- and seven-gluon amplitudes with two adjacent
negative-helicity gluons, A_{6;1}(1^-,2^-,3^+,4^+,5^+,6^+) and
A_{7;1}(1^-,2^-,3^+,4^+,5^+,6^+,7^+), which uses the previously-computed
logarithmic parts of the amplitudes as input. We present a compact expression
for the six-gluon amplitude. No loop integrals are required to obtain the
rational parts.


title:
Extended analysis of the MSSM Higgs boson production at the Photon
  Collider

abstract:
  New analysis of the heavy, neutral MSSM Higgs bosons H and A production at
the Photon Collider is presented for M_A = 200, 250, 300 and 350 GeV in the
parameter range corresponding to the so called "LHC wedge" and beyond. The
expected precision of the cross section measurement for the process
gamma+gamma->A,H->b+bbar and the "discovery reach" of the Photon Collider are
compared for different MSSM scenarios. The analysis takes into account all
relevant theoretical and experimental issues which could affect the
measurement. For MSSM Higgs bosons A and H, for M_A = 200-350 GeV and
tan(beta)=7, the statistical precision of the cross-section determination is
estimated to be 8-34%, after one year of Photon Collider running, for four
considered MSSM parameters sets. As heavy neutral Higgs bosons in this scenario
may not be discovered at LHC or at the first stage of the e+e- collider, an
opportunity of being a discovery machine is also studied for the Photon
Collider.


title: Pion condensation in quark matter with finite baryon density

abstract:
  The phase structure of the Nambu -- Jona-Lasinio model at zero temperature
and in the presence of baryon- and isospin chemical potentials is investigated.
It is shown that in the chiral limit and for a wide range of model parameters
there exist two different phases with pion condensation. In the first, ordinary
phase, quarks are gapped particles. In the second, gapless pion condensation
phase, there is no energy cost for creating only $u$- or both $u$ and $d$
quarks, and the density of baryons is nonzero.


title: On the high order multiplicity moments

abstract:
  The description of multiplicity distributions in terms of the ratios of
cumulants to factorial moments is analyzed both for data and for the Monte
Carlo generated events. For the PYTHIA generated events the moments are
investigated for the restricted range of phase-space and for the jets
reconstructed from single particle momenta. The results cast doubts on the
validity of extended local parton-hadron duality and suggest the possibility of
more effective experimental investigations concerning the origin of the
observed structure in the dependence of moments on their order.


title: Precision Higgs Masses with FeynHiggs 2.2

abstract:
  FeynHiggs is a program for computing MSSM Higgs-boson masses and related
observables, such as mixing angles, branching ratios, and couplings, including
state-of-the-art higher-order contributions. The centerpiece is a Fortran
library for use with Fortran and C/C++. Alternatively, FeynHiggs has a
command-line, Mathematica, and Web interface. The command-line interface can
process, besides its native format, files in SUSY Les Houches Accord format.
FeynHiggs is an open-source program and easy to install.


title: The Effect of Positivity Constraints on Polarized Parton Densities

abstract:
  The impact of positivity constraints on the polarized parton densities has
been studied. Special attention has been paid to the role of positivity
constraints in determining the polarized strange quark and gluon densities,
which are not well determined from the present data on inclusive polarized DIS.


title:
The role of polarized positrons and electrons in revealing fundamental
  interactions at the Linear Collider

abstract:
  The proposed International Linear Collider (ILC) is well-suited for
discovering physics beyond the Standard Model and for precisely unraveling the
structure of the underlying physics. The physics return can be maximized by the
use of polarized beams. This report shows the paramount role of polarized beams
and summarizes the benefits obtained from polarizing the positron beam, as well
as the electron beam. The physics case for this option is illustrated
explicitly by analyzing reference reactions in different physics scenarios. The
results show that positron polarization, combined with the clean experimental
environment provided by the linear collider, allows to improve strongly the
potential of searches for new particles and the identification of their
dynamics, which opens the road to resolve shortcomings of the Standard Model.
The report also presents an overview of possible designs for polarizing both
beams at the ILC, as well as for measuring their polarization.


title: Productions of $K^*_0(1430)$ and $K_{1}$ in B decays

abstract:
  We study the productions of p-wave mesons $K^*_{0}(1430)$, $K_{1}(1270)$ and
$K_{1}(1400)$ in B decays. By the generalized factorization approach, we find
that the branching ratios of $B\to K^*_{0}(1430) \phi$ are similar to those of
$B\to K \phi$ while the branching ratios of $B\to K_{1}(1270) \phi$ and $B\to
K_{1}(1400) \phi$ are $O(10^{-5})$ and $O(10^{-6})$, respectively. In terms of
the observation of $B\to K_{1}(1270) \gamma$ by BELLE, we can remove the sign
ambiguity in the mixing angle for physical states $K_1(1270)$ and
$K_{1}(1400)$. In addition, we analyze annihilation contributions in the decays
$B\to K_1 \phi$ and we conclude that they could be neglected.


title: Antihyperon polarization in high-energy inclusive reactions

abstract:
  We propose a model for the antihyperon polarization in high-energy
proton-nucleus inclusive reactions, based on the final-state interactions
between the antihyperons and other produced particles (predominantly pions). To
formulate this idea, we use the previously obtained low-energy
pion-(anti-)hyperon interaction using effective chiral Lagrangians, and a
hydrodynamic parametrization of the background matter, which expands and
decouples at a certain freezeout temperature.


title: Diffractive Dijet Photoproduction

abstract:
  We have calculated diffractive dijet production in deep-inelastic scattering
(DIS) at low-Q^2 and next-to-leading order (NLO) of perturbative QCD, including
contributions from direct and resolved photons. We study how the cross section
depends on the factorization scheme and scale M_\gamma at the virtual photon
vertex for the occurance of factorization breaking. The strong
M_\gamma-dependence, which is present when only the resolved cross section is
suppressed, is tamed by intodrucing the suppression also in the initial-state
NLO correction of the direct part.


title: Recent Progress in Parton Distributions and Implications for LHC Physics

abstract:
  I outline some of the most recent developments on the global fit to parton
distributions performed by the MRST collaboration.


title:
Sum Rules for Magnetic Moments and Polarizabilities in QED and Chiral
  Effective-Field Theory

abstract:
  We elaborate on a recently proposed extension of the Gerasimov-Drell-Hearn
(GDH) sum rule which is achieved by taking derivatives with respect to the
anomalous magnetic moment. The new sum rule features a {\it linear} relation
between the anomalous magnetic moment and the dispersion integral over a
cross-section quantity. We find some analogy of the linearized form of the GDH
sum rule with the `sideways dispersion relations'. As an example, we apply the
linear sum rule to reproduce the famous Schwinger's correction to the magnetic
moment in QED from a tree-level cross-section calculation and outline the
procedure for computing the two-loop correction from a one-loop cross-section
calculation. The polarizabilities of the electron in QED are considered as well
by using the other forward-Compton-scattering sum rules. We also employ the sum
rules to study the magnetic moment and polarizabilities of the nucleon in a
relativistic chiral EFT framework. In particular we investigate the chiral
extrapolation of these quantities.


title:
Puzzle of W Leptonic Decay Branching Fractions and Gauge Model of
  Generation Nonuniversality

abstract:
  Lepton generation universality holds very well in Z decays, but appears to be
violated in recent LEP data of W leptonic decay branching fractions. If this
trend persists, a consistent and natural explanation is a model of generation
nonuniversality, based on the gauge group SU(2)_L X U(1)_R X U(1)_{B-L}.


title: Jet correlation measurement in heavy-ion collisions: from RHIC to LHC

abstract:
  We attempt to deduce simple options of `jet quenching' phenomena in heavy-ion
collisions at $\snn=5.5 \tev$ at the LHC from the present knowledge of
leading-hadron suppression at RHIC energies. In light of the nuclear
modification factor for leading particles we introduce the nuclear modification
factor for jets, $\RAA^{jet}$, and for the longitudinal momenta of particles
along the jet axis, $\RAA^{p_{\rm L}}$.


title: Recursive Calculation of One-Loop QCD Integral Coefficients

abstract:
  We present a new procedure using on-shell recursion to determine coefficients
of integral functions appearing in one-loop scattering amplitudes of gauge
theories, including QCD. With this procedure, coefficients of integrals,
including bubbles and triangles, can be determined without resorting to
integration. We give criteria for avoiding spurious singularities and boundary
terms that would invalidate the recursion. As an example where the criteria are
satisfied, we obtain all cut-constructible contributions to the one-loop
n-gluon scattering amplitude, A_n^{oneloop}(...--+++...), with split-helicity
from an N=1 chiral multiplet and from a complex scalar. Using the
supersymmetric decomposition, these are ingredients in the construction of QCD
amplitudes with the same helicities. This method requires prior knowledge of
amplitudes with sufficiently large numbers of legs as input. In many cases,
these are already known in compact forms from the unitarity method.


title: Photon Mixing in Domain Walls and the Cosmic Coincidence Problem

abstract:
  A model is presented where there exists another U(1) gauge group which is
extremely weakly coupled to that of QED except inside the core of domain walls.
It is possible to choose parameters such that standard model photons crossing
such a wall are mixed maximally with the 'para-photons' of the other U(1). We
use this model to explain the apparent low luminosity of high redshift
supernovae. A possible mechanism is outlined where the domain walls correspond
to changes in the relative orientation of branes in a compact space. The model
is rather contrived but has the advantage that for a wide range of values it
can solve the cosmic coincidence problem - an observer at any redshift would
come to the conclusion that their universe had recently started to accelerate.


title: Non-Oscillation Probes of the Neutrino Mass Hierarchy and Vanishing U_e3

abstract:
  One of the outstanding issues in neutrino physics is the experimental
determination of the neutrino mass hierarchy: Is the order of the neutrino
masses ``normal'' - m_1^2<m_2^2<m_3^2 - or is it inverted - m_3^2<m_1^2<m_2^2,
with m_2^2-m_1^2 << m_2^2,m_1^2? While this issue can be resolved in
next-generation long-baseline nu_{mu} to nu_e neutrino oscillation studies if
|U_{e3}|^2 is large enough, a clear strategy on how to resolve it if |U_{e3}|^2
is sufficiently small is still lacking. We study the capability of
non-oscillation probes of neutrino masses to determine the neutrino mass
ordering. We concentrate on studies of m_{nu_e}, the kinematical neutrino mass
to which precise studies of tritium beta-decay are sensitive, m_{ee}, the
effective mass to which the rate for neutrinoless double-beta decay is
sensitive if the neutrinos are Majorana fermions, and Sigma, the sum of the
neutrino masses, to which cosmological probes of the energy budget of the
Universe are sensitive. We find that combined measurements of m_{ee}, Sigma,
and m_{nu_e} are capable of establishing the neutrino mass hierarchy if these
measurements are precise enough and if one ``gets lucky.'' We quantify the
previous sentence in detail by performing a numerical analysis of a large
number of theoretical data sets, for different measured values of m_{nu_e},
m_{ee}, and Sigma, keeping in mind the ultimate sensitivity that can be reached
by next (and next-to-next) generation experiments.


title:
Looking for forward backward asymmetries in $B\to K \mu^+ \mu^-$ and
  $K^+\to \pi^+\mu^+\mu^-$

abstract:
  We investigate the possibility of scalar interaction affecting the forward
backward asymmetry in the decay mode $B\to K \mu^+ \mu^-$. Using the scalar
contribution and advocating Cheng-Sher type ansatz we obtain sizable forward
backward asymmetry. Furthermore, we study the effect of the scalar interaction
in $K^+ \to \pi^+ \mu^+ \mu^-$. It is pointed out that non-zero forward
backward asymmetry in $B\to K l^+ l^-$, if found in future B-factories, may
indicate the new physics in the scalar sector.


title:
Next-to-leading Order QCD Corrections to A_TT for Single-Inclusive
  Hadron Production

abstract:
  We report on a calculation of the next-to-leading order QCD corrections to
the partonic cross sections contributing to single-inclusive high-p_T hadron
production in collisions of transversely polarized hadrons. We give some
predictions for the double spin asymmetry A_TT^\pi for the proposed experiments
at RHIC and at the GSI.


title: Eta bound states in nuclei: a probe of flavour-singlet dynamics

abstract:
  We argue that eta bound states in nuclei are sensitive to the singlet
component in the eta. The bigger the singlet component, the more attraction and
the greater the binding. Thus, measurements of eta bound states will yield new
information about axial U(1) dynamics and glue in mesons. Eta - etaprime mixing
plays an important role in understanding the value of the eta-nucleon
scattering length.


title: The Possible Interpretations of Y(4260)

abstract:
  The recently observed Y(4260) lies far above the decay threshold with a width
less than 100 MeV. We argue that it's very difficult to accommodate Y(4260) as
a conventional $c\bar c$ radial excitation or a D-wave state. It can't be a
hadronic molecule. Its production mechanism and special decay pattern do not
favor the glueball interpretation. If Y(4260) is a scalar tetraquark, it must
be produced by the I=0 component of the virtual photon. Then the $I=1, I_z=0$
component of the virtual photon should have produced its isovector partner
$Y^\prime (4260)$, which may be searched for in the decay channel
$\pi^+\pi^-\pi^0 J/\psi$ using exactly the same database from the initial state
radiation process. The observation/non-observation of $Y^\prime (4260)$ can
easily confirm/reject the tetraquark hypothesis. However, a tetraquark far
above threshold can fall apart into $D\bar D, D^\ast\bar D$ very easily. Its
not-so-large width and the non-observation of $D\bar D$ mode tend to disfavor
the tetraquark hypothesis. Hence the only feasible interpretation is a hybrid
charmonium if Y(4260) is {\sl NOT} an experimental artifact. At present, none
of the experimental information from BABAR measurement is in conflict with the
hybrid charmonium picture.


title:
Upper bound on the mass scale of superpartners in minimal N=2
  supersymmetry

abstract:
  If N=2 supersymmetry breaks to N=1 supersymmetry at an intermediate scale
$m_2$ and then, later on, N=1 supersymmetry breaks and produces standard model
at a scale $m_{susy}$ such that $m_2 > m_{susy}$, renormalization group
evolution of three gauge couplings are altered above the scale $m_2$, changing
the unification scale and the unified coupling. We show that when we enforce
this general condition $m_2 > m_{susy}$ on the solutions of the renormalization
group equations, the condition is translated into an upper bound on the scale
$m_{susy}$. Using presently favored values of
$\alpha_1(m_z),\alpha_2(m_z),\alpha_3(m_z)$, we get $m_{susy} < 4.5 \times
10^9$ GeVs for the central value of $\alpha_3(m_Z)$. When low energy threshold
effect is present, this bound gets smeared yet remains generally stable in the
$10^9-10^{10}$ GeV range. We also show that if we demand string unification
instead of having an unified gauge theory, this constraint can be changed by
exotic hypercharge normalizations.


title: Higher Derivative Fermionic Field Equation in the First Order Formalism

abstract:
  The generalized Dirac equation of the third order, describing particles with
spin 1/2 and three mass states, is analyzed. We obtain the first order
generalized Dirac equation in the 24-dimensional matrix form. The mass and spin
projection operators are found which extract solutions of the wave equation
corresponding to pure spin states of particles. The density of the
electromagnetic current is obtained, and minimal and non-minimal (anomalous)
electromagnetic interactions of fermions are considered by introducing three
phenomenological parameters. The Hamiltonian form of the first order equation
has been obtained.


title: Pentaquarks in Chiral Soliton Models; notes and discussion

abstract:
  The spectra of pentaquarks, some of them being observed recently, are
discussed within topological soliton model and compared with simplified quark
picture. Results obtained within chiral soliton model depend to some extent on
the quantization scheme: rigid rotator, soft rotator, or bound state model. The
similarity of spectra of baryon resonances obtained within quark model and
chiral soliton model is pointed out, although certain differences take place as
well, which require careful interpretation. In particular, considerable
variation of the strange antiquark mass in different SU(3) multiplets of
pentaquarks is required to fit their spectra obtained from chiral solitons.
Certain difference of masses of "good" and "bad" diquarks is required as well,
in qualitative agreement with previously made estimates. The partners of exotic
states with different values of spin which belong to higher SU(3) multiplets,
have the energy considerably higher than states with lowest spin, and this
could be a point where the difference from simple quark models is striking. The
antiflavor excitation energies for multibaryons are estimated as well, and
binding energies of $\Theta$-hypernuclei and anticharm (antibeauty) hypernuclei
are presented for several baryon numbers. Some deficiencies in the
argumentation against validity of the chiral soliton approach and/or SU(3)
quantization models, existing in the literature, are pointed out.


title: Experimental Tests of Charge Symmetry Violation in Parton Distributions

abstract:
  Recently, a global phenomenological fit to high energy data has included
charge symmetry breaking terms, leading to limits on the allowed magnitude of
such effects. We discuss two possible experiments that could search for isospin
violation in valence parton distributions. We show that, given the magnitude of
charge symmetry violation consistent with existing global data, such
experiments might expect to see effects at a level of several percent.
Alternatively, such experiments could significantly decrease the upper limits
on isospin violation in parton distributions.


title:
High scale perturbative gauge coupling in R-parity conserving SUSY
  SO(10) with longer proton lifetime

abstract:
  It is well known that in single step breaking of R-parity conserving SUSY
SO(10) that needs the Higgs representations $126+\bar 126$ the GUT-gauge
coupling violates the perturbative constraint at mass scales few times larger
than the GUT scale. Therefore, if the SO(10) gauge coupling is to remain
perturbative up the Planck scale(=2x10^{18} GeV), the scale $M_U$ of GUT
symmetry breaking is to be bounded from below. The bound depends upon specific
Higgs representations used for SO(10) symmetry breaking but, as we find, can
not be lower than $1.5x10^{17}$ GeV. In order to obtain such high unification
scale we propose a two-step SO(10) breaking through
$SU(2)_LXSU(2)_RXU(1)_{B-L}XSU(3)_C(g_{2L} \neq g_{2R})$ intermediate gauge
symmetry. We estimate potential threshold and gravitational corrections to the
running of gauge couplings and show that they can make the picture of
perturbative GUT- gauge coupling running consistent at least up to the Planck
scale. We also show that when $SO(10) \to G_{2213}$ by $210 + 54$,
gravitational corrections alone with negligible threshold effects may guarantee
such perturbative gauge coupling. The lifetime of the proton is found to
increase by nearly 6 orders over the current experimental limit for $p \to
e^+\pi^0$. For the proton decay mediated by dim.5 operator a wide range of
lifetimes is possible extending from the current experimental limit up to
values 2-3 orders longer.


title: Neutron - Mirror Neutron Oscillations: How Fast Might They Be?

abstract:
  We discuss the phenomenological implications of the neutron (n) oscillation
into the mirror neutron (n'), a hypothetical particle exactly degenerate in
mass with the neutron but sterile to normal matter. We show that the present
experimental data allow a maximal n-n' oscillation in vacuum with a
characteristic time $\tau$ much shorter than the neutron lifetime, in fact as
small as 1 sec. This phenomenon may manifest in neutron disappearance and
regeneration experiments perfectly accessible to present experimental
capabilities and may also have interesting astrophysical consequences, in
particular for the propagation of ultra high energy cosmic rays.


title: Advantages and Distinguishing Features of Focus Point Supersymmetry

abstract:
  Diverse experimental constraints now motivate models of supersymmetry
breaking in which some superpartners have masses well above the weak scale.
Three alternatives are focus point supersymmetry and inverted hierarchy models,
which embody a naturalness constraint, and the more recent framework of split
supersymmetry, which relaxes that constraint. Many aspects of their
phenomenology are very similar. They can be distinguished, however, through
detailed study of superoblique parameters, the Higgs potential and other
observables.


title: Scalar meson mediated nuclear mu-e conversion

abstract:
  We study the nuclear mu-e conversion in the general framework of the
effective Lagrangian approach without referring to any specific realization of
the physics beyond the standard model (SM) responsible for lepton flavor
violation (LFV). We analyze the role of scalar meson exchange between the
lepton and nucleon currents and show its relevance for the coherent channel of
mu-e conversion. We show that this mechanism introduces modifications in the
predicted mu-e conversion rates in comparison with the conventional direct
nucleon mechanism, based on the contact type interactions of the nucleon
currents with the LFV leptonic current. We derive from the experimental data
lower limits on the mass scales of the generic LFV lepton-quark contact terms
and demonstrate that they are more stringent than the similar limits existing
in the literature.