title:
Electron- and neutrino-nucleus scattering in the impulse approximation
  regime

abstract:
  A quantitative understanding of the weak nuclear response is a prerequisite
for the analyses of neutrino experiments such as K2K and MiniBOONE, which
measure energy and angle of the muons produced in neutrino-nucleus interactions
in the energy range $0.5-3$ GeV and reconstruct the incident neutrino energy to
determine neutrino oscillations. In this paper we discuss theoretical
calculations of electron- and neutrino-nucleus scattering, carried out within
the impulse approximation scheme using realistic nuclear spectral
functions.Comparison between electron scattering data and the calculated
inclusive cross section off oxygen, at beam energies ranging between 700 and
1200 MeV, show that the Fermi gas model, widely used in the analysis of
neutrino oscillation experiments,fails to provide a satisfactory description of
the measured cross sections,and inclusion of nuclear dynamics is needed.


title: Estimating the I=3/2 K pi interaction in D decay

abstract:
  Heavy flavour decay to light hadrons is the key to understanding many aspects
of the SM from CP violation to strong dynamics. It is often presumed in line
with the simple quark spectator model of D decay to Kpipi that the Kpi system
has only I=1/2. E791 have recently presented an analysis of their results on D+
to (K-pi+)pi+ using a generalised isobar picture of two body interactions.
While higher Kpi waves are described by sums of known resonances, the S-wave
amplitude and phase are determined bin-by-bin in Kpi mass. The phase variation
is found not to be that of K-pi+ elastic scattering. This hints at a different
mixture of I=1/2 and I=3/2 S-wave interactions than in elastic scattering.
Applying Watson's theorem to this generalised isobar model allows us to
estimate the I=3/2 Kpi S-wave component. We indeed find that this is larger
than in hadronic scattering or semileptonic processes.


title: Properties of the Effective Hamiltonian for the System of Neutral Kaons

abstract:
  We study the properties of time evolution of the $K^{0}-\bar{K}^{0} $ system
in spectral formulation. Within the one--pole model we find the exact form of
the diagonal matrix elements of the effective Hamiltonian for this system. It
appears that, contrary to the Lee--Oehme--Yang (LOY) result, these exact
diagonal matrix elements are different if the total system is CPT--invariant
but CP--noninvariant.


title: Diquark in Nona-quark States

abstract:
  We study the nonaquark states $S^0(3115)$ and $S^+(3140)$ which are reported
by KEK-PS (Phys.Lett. B597 (2004) 236; nucl-ex/0310018) by means of the quark
model with diquark correlation. The nonaquark states form
$\bf{1},\bf{8},\bf{10},\bar{\bf{10}},\bf{27},\bar{\bf{35}}$ SU(3) multiplets.
The flavor wave functions of all the nonaquark states are constructed through
the standard tensor technique. The mass spectrum is studied by using
Gell-Mann-Okubo mass formula. Some nonaquark mass sum rules are obtained. We
further investigate the decay of $S^0(3115)$ and $S^+(3140)$ under the
assumption of "fall-apart" mechanism. It has been found that the main decay
mode is $\Sigma NN$ rather than $\Lambda NN$ which is consistent with
experiment. Also we have uniquely determine the flavor wave function of
$S^0(3115)$ which belong to $\bf{27}$-plet with the quantum number
$Y=2,I=1,I_z=-1$. Whereas the exotic states $S^+(3140)$ can belong to either
$\bf{27}$-plet or $\bar{\bf{35}}$-plet. In the exact $SU(3)^{flavor}\times
SU(3)^{color}\times SU(2)^{spin}$ limit, both $S^0(3115)$ and $S^+(3140)$
belong to ${\bf 27}$-plet with negative parity. We predict that its flavor
structure can be determined by measuring the branch fractions of its decay
channels. The experiments to check this prediction are expected.


title: SANCnews: Sector ffbb

abstract:
  In this paper we describe the implementation of processes f_1 bar-f_1 ZZ -->
0 and f_1 bar-f_1 HZ --> 0 into the framework of SANC system. The f_1 stands
for a massless fermion f whose mass is kept non-zero only in arguments of ln
functions and --> 0 means that all 4-momenta flow inwards. The derived scalar
form factors can be used for any cross channel after an appropriate permutation
of their arguments (s,t,u). We present the covariant and helicity amplitudes
for these processes: for the former only in the annihilation channel f_1
bar-f_1 --> ZZ, while for the latter in annihilation f_1 bar-f_1 --> HZ and
decay H --> Z f_1 bar-f_1 channels. We briefly describe additional
precomputation modules which were not covered in the previous paper. For the
processes f_1 bar-f_1 --> HZ(ZZ) and decay H --> Z f_1 bar-f_1 we present
compact results of calculation of the accompanying bremsstrahlung and discuss
exhaustive numerical results. As applications there are two types of the Monte
Carlo generators for the process H --> 4\mu. The first one is the generator
based on a single resonance approximation for one of the Z bosons. The second
one, exploiting the double resonance approximation, is not described in this
article. For the generator in the single approximation we present a short
description. Whenever possible, we compare our results with those existing in
the literature. For example, we present a comparison of the results for H --> 4
\mu decay with those obtained by MC generator Prophecy4f.


title:
Factorization scheme and scale dependence in diffractive dijet
  production at low Q^2

abstract:
  We calculate diffractive dijet production in deep-inelastic scattering at
next-to-leading order of perturbative QCD, including contributions from direct
and resolved photons, and compare our predictions to preliminary data from the
H1 collaboration at HERA. We study how the cross section depends on the
factorization scheme and scale M_\gamma at the virtual photon vertex for the
occurrence of factorization breaking. The strong M_\gamma-dependence, which is
present when only the resolved cross section is suppressed, is tamed by
introducing the suppression also into the initial-state NLO correction of the
direct part.


title: Running of Low-Energy Neutrino Masses, Mixing Angles and CP Violation

abstract:
  We calculate the running of low-energy neutrino parameters from the bottom
up, parameterizing the unknown seesaw parameters in terms of the dominance
matrix $R$. We find significant running only if the $R$ matrix is non-trivial
and the light-neutrino masses are moderately degenerate. If the light-neutrino
masses are very hierarchical, the quark-lepton complementarity relation
$\theta_c + \theta_{12} = \pi/4$ is quite stable, but $\theta_{13,23}$ may run
beyond their likely future experimental errors. The running of the oscillation
phase $\delta$ is enhanced by the smallness of $\theta_{13}$, and jumps in the
mixing angles occur in cases where the light-neutrino mass eigenstates cross.


title: Bound states in Yukawa theory

abstract:
  A generalization of the Gell-Mann-Low Theorem is applied to bound state
calculations in Yukawa theory. The resulting effective Schroedinger equation is
solved numerically for two-fermion bound states with the exchange of a massless
boson. The complete low-lying bound state spectrum is obtained for different
ratios of the constituent masses. No abnormal solutions are found. We show the
consistency of the non-relativistic and one-body limits and discuss the special
cases of identical fermions and fermion-antifermion states. To our knowledge,
this is the first consistent calculation of bound states in pure Yukawa theory
(without UV cutoff).


title: Charge asymmetry in the photonic production of charmed mesons

abstract:
  Charge asymmetries for the charm meson production ($D^{*+}$--$D^{*-}$,
$D^{*0}$--$\bar D^{*0}$ and $D^+_s$--$\bar D^-_s$) have been estimated for the
COMPASS kinematic conditions in the framework of perturbative recombination
model. Mass corrections have been taken into account in the calculations. The
large asymmetry for $D^+_s$--$\bar D^-_s$ production has been predicted.


title: Chiral Suppression of Scalar Glueball Decay

abstract:
  Because glueballs are SU(3)_{Flavor} singlets, they are expected to couple
equally to u,d, and s quarks, so that equal coupling strengths to \pi^+\pi^-
and K^+K^- are predicted. However, we show that chiral symmetry implies the
scalar glueball amplitude for G_0 \to \qbq is proportional to the quark mass,
so that mixing with \sbs mesons is enhanced and decays to K^+K^- are favored
over \pi^+\pi^-. Together with evidence from lattice calculations and from
experiment, this supports the hypothesis that f_0(1710) is the ground state
scalar glueball.


title: Particle Correlations in Saturated QCD Matter

abstract:
  We study quantitatively angular correlations in the two-particle spectrum
produced by an energetic probe scattering off a dense hadronic target with
sizeable saturation momentum. To this end, two parton inclusive cross sections
for arbitrary projectiles with small color charge density are derived in the
eikonal formalism. Our results are the following: For large momenta of the
observed particles, the perturbative limit with characteristic back-to-back
correlation is recovered. As the trigger momenta get closer to the saturation
scale Q_s, the angular distribution broadens. When the momenta are
significantly smaller than Q_s, the azimuthal distribution is broad but still
peaked back-to-back. However, in a narrow momentum range (0.5 - 1.5) Q_s, we
observe that the azimuthal correlation splits into a double peak with maxima
displaced away from 180 degree. We argue that it is the soft multiple
scattering physics that is responsible for the appearance of this shift in the
angle of maximal correlation. We also point out that when the physical size of
the projectile is particularly small, the double peak structure persists in a
significantly wider range of final state momenta.


title: $T$-Odd Effects in Unpolarized Drell-Yan Scattering

abstract:
  We consider the leading twist $T$-odd contributions as the dominant source of
the $\cos 2\phi$ azimuthal asymmetry in unpolarized $p\bar{p}\to \mu\mu^+ X$
dilepton production in Drell-Yan Scattering. This asymmetry contains
information on the distribution of quark transverse spin in an unpolarized
proton. In a parton-spectator framework we estimate these asymmetries at $50
{\rm GeV}$ center of mass energy. This azimuthal asymmetry is interesting in
light of proposed experiments at GSI, where an anti-proton beam is ideal for
studying the transversity properties of quarks due to the dominance of {\em
valence} quark effects.


title: Lepton flavor changing Higgs boson decays in SUSY with $\nu_R$

abstract:
  Lepton flavor violating Higgs boson decays (LFVHD) are studied in the context
of the Minimal Supersymmetric Standard Model (MSSM) being embeded in a mSUGRA
scenario that is enlarged with three right handed neutrinos and their
supersymmetric partners, and with the neutrino masses being generated by the
seesaw mechanism. We compute the partial widths for these decays to one-loop
order and analyze numerically the corresponding branching ratios in terms of
the mSUGRA and seesaw parameters. We analyze in parallel the lepton flavor
changing $\l_j\to l_i \gamma$ decays and explore the maximum predicted rates
for LFVHD, mainly for $H^0,A^0 \to \tau {\bar \mu}$ decays, by requiring
compatibility with neutrino and $BR(\l_j\to l_i \gamma)$ data. We find LFVHD
ratios of up to $10^{-5}$ in some regions of the MSSM-seesaw parameter space.


title: Gravitino dark matter in gauge mediated supersymmetry breaking

abstract:
  This paper investigates the parameter space of theories with gauge mediated
supersymmetry breaking leading to gravitino (cold) dark matter with mass
m_{3/2}= 1keV - 10MeV. We pay particular attention to the cosmological role of
messenger fields. Cosmology requires that these messengers decay to the visible
sector if the lightest messenger mass M_X > 30TeV. We then examine the various
possible messenger number violating interactions allowed by the symmetries of
the theory and by phenomenology. Late messenger decay generally results in
entropy production hence in the dilution of pre-existing gravitinos. We find
that in SU(5) grand unification only specific messenger-matter couplings allow
to produce the required amount of gravitino dark matter particles. Gravitino
dark matter with the correct abundance is however expected in larger gauge
groups such as SO(10) for generic non-renormalizable messenger-matter
interactions and for arbritrarily high post-inflationary reheating
temperatures.


title: Gauge coupling Unification and SO(10) in 5D

abstract:
  We analyze the gauge unification in minimal supersymmetric SO(10) grand
unified theories in 5 dimensions. The single extra spatial dimension is
compactified on the orbifold S^1/(Z_2 x Z_2') reducing the gauge group to that
of Pati-Salam SU(4)_c x SU(2)_L x SU(2)_R. The Standard Model gauge group is
achieved by the further brane-localized Higgs mechanism on one of the fixed
points. There are two main different approaches developed in literature. Higgs
mechanism can take place on the Pati Salam brane, or on the SO(10) preserving
brane. We show, both analytically and numerically, that in the first case a
natural and succesfull gauge coupling unification can be achieved, while the
second case is highly disfavoured. For completeness, we consider either the
case in which the brane breaking scale is near the cutoff scale or the case in
which it is lower than the compactification scale.


title: Neutrino mass and lepton number violation in the Little Higgs model

abstract:
  We study lepton number violation in Little Higgs model and find that the
choice of putting triplet Higgs vev equal to zero so as not to have any tree
level neutrino Majorana mass is not natural in the sense that such a term is
generated at the one loop level. We investigate the contribution of exotic
lepton number violating terms on neutrinoless double beta decay, K meson decay
and on trilepton production in $\nu$-N scattering.


title:
Limiting temperature from a parton gas with power-law tailed
  distribution

abstract:
  We combine Tsallis distributed massless partons to an effective thermal
prehadron spectrum by folding. A limiting temperature and a mass spectrum
combined of three exponentials emerge from this procedure. Meson and baryon
resonance spectra have different polynomial prefactors.


title: Sector of the $2^{++}$ mesons: observation of the tensor glueball

abstract:
  Data of the Crystal Barrel and L3 collaborations clarified essentially the
situation in the $2^{++}$ sector in the mass region up to 2400 MeV,
demonstrating the linearity of $(n,M^2)$ trajectories, where $n$ is the radial
quantum number of a quark-antiquark state with mass $M$. We discuss these data
and show that there exists a superfluous state for the $(n,M^2)$ trajectories:
a broad resonance $f_2(2000)$. We pay special attention to the reactions $p\bar
p\to\pi\pi,\eta\eta,\eta\eta'$ in the mass region 1990--2400 MeV where,
together with $f_2(2000)$, four relatively narrow resonances are seen:
$f_2(1920)$, $f_2(2020)$, $f_2(2240)$, $f_2(2300)$. We analyse the branching
ratios of all these resonances and show that only the decay couplings of the
broad state $f_2(2000)\to\pi^0\pi^0,\eta\eta, \eta\eta'$ satisfy relations
inherent in the glueball decay.


title:
Prediction for the transverse momentum distribution of Drell-Yan
  dileptons at GSI-PANDA

abstract:
  We predict the triple differential cross section of the Drell-Yan process
(pbar p -> l^+l^-X) in the kinematical regimes relevant for the upcoming PANDA
experiment, using a model that accounts for quark virtuality as well as
primordial transverse momentum. We find a cross section magnitude of up to 10
nb in the low mass region. A measurement with 10% accuracy is desirable in
order to constrain the partonic transverse momentum dispersion and the spectral
function width within +-50 MeV and to study their evolution with M and sqrt(s).


title:
Spin rotation and birefringence effect for a particle in a high energy
  storage ring and measurement of the real part of the coherent elastic
  zero-angle scattering amplitude, electric and magnetic polarizabilities

abstract:
  In the present paper the equations for the spin evolution of a particle in a
storage ring are analyzed considering contributions from the tensor electric
and magnetic polarizabilities of the particle. Study of spin rotation and
birefringence effect for a particle in a high energy storage ring provides for
measurement as the real part of the coherent elastic zero-angle scattering
amplitude as well as tensor electric and magnetic polarizabilities.
  We proposed the method for measurement the real part of the elastic coherent
zero-angle scattering amplitude of particles and nuclei in a storage ring by
the paramagnetic resonance in the periodical in time nuclear pseudoelectric and
pseudomagnetic fields.


title:
Investigations on T violation and CPT symmetry in the neutral kaon
  system -- a pedagogical approach --

abstract:
  During the recent years experiments with neutral kaons have yielded
remarkably sensitive results which are pertinent to such fundamental phenomena
as CPT invariance (protecting causality), time-reversal invariance violation,
coherence of wave functions, and entanglement of kaons in pair states. We
describe the phenomenological developments and the theoretical conclusions
drawn from the experimental material. An outlook to future experimentation is
indicated.


title: Breaking Discrete Symmetries in Broken Gauge Theories

abstract:
  We study the spontaneous breaking of discrete symmetries in theories with
broken gauge symmetry. The intended application is to CP breaking in theories
with gauged flavor symmetries, but the analysis described here is preliminary.
We dispense with matter fields and take the gauge theory to be weakly coupled
and broken spontaneously by unspecified, short-distance forces. We develop an
effective-field-theory description of the resultant low energy theory, and ask
whether this theory by itself can describe the subsequent breaking of discrete
symmetries. We conclude that this can happen depending on the parameters of the
effective theory, and that the intrinsic violation is naturally of order unity.


title: Structure and reactions of pentaquark baryons

abstract:
  We review the current status of the exotic pentaquark baryons. After a brief
look at experiments of both positive and negative results, we discuss
theoretical methods to study the structure and reactions for the pentaquarks.
First we introduce the quark model and the chiral soliton model, where we
discuss the relation of mass spectrum and parity with some emphasis on the role
of chiral symmetry. It is always useful to picture the structure of the
pentaquarks in terms of quarks. As for other methods, we discuss a model
independent method, and briefly mention the results from the lattice and QCD
sum rule. Decay properties are then studied in some detail, which is one of the
important properties of Theta+. We investigate the relation between the decay
width and the quark structure having certain spin-parity quantum numbers.
Through these analyses, we consider as plausible quantum numbers of Theta+, JP
= 3/2-. In the last part of this note, we discuss production reactions of
Theta+ which provide links between the theoretical models and experimental
information. We discuss photoproductions and hadron-induced reactions which are
useful to explore the nature of Theta+


title:
Monte-Carlo simulation of lepton pair production in "p pbar --> l+l- +
  X" events at E_beam = 14 GeV

abstract:
  The lepton pair production in collisions of antiproton beam (E_beam = 14 GeV)
with proton target is studied on the basis of event samples simulated with
PYTHIA6 generator. Two types of quark level subprocesses are considered. The
first one goes through the production of virtual photon which converts into
lepton pair (q qbar --> gamma* --> l+l-) having a continuous energy spectrum of
the final lepton pair invariant mass. The other subprocess proceeds through the
J/Psi resonance production (p pbar --> J/Psi + X --> l+l- + X) with the
following decay of J/Psi into a pair of leptons. The distributions of different
kinematical variables which may be useful for the design of the muon system and
the electromagnetic calorimeter of the detector of PANDA experiment at FAIR are
presented. The analysis of these distribution shows the possibility to measure
the proton structure function in a new kinematical region defined by the
time-like values of the square of the momentum transferred 1 < Q^2 < 6.25 GeV^2
and withing a rather wide interval 0.05 < x < 0.7 of Bjorken x-variable. The
problems due to the presence of fake leptons that appear from meson decays, as
well as due to the background caused by minimum bias events and other QCD
processes, are also discussed. The set of cuts which allows one to separate the
signal events with lepton pairs from this kind of background events is
proposed.


title: Soft Hadron Ratios at the LHC

abstract:
  High precision soft hadron abundance data produced in relativistic nuclear
collisions at LHC at $\sqrt{s_{\rm NN}}\le 5500$ GeV will become available
beginning in 2007/8. We explore, within the statistical hadronization model,
how these results can help us understand the properties of the deconfined
quark--gluon phase at its breakup. We make assumptions about the physical
properties of the fireball and obtain particle production predictions. Then, we
develop a strategy to measure parameters of interest, such as strangeness
occupancy $\gamma_s$, chemical potentials $\mu_{\rm B}$ and $\mu_{\rm S}$.


title: X(3872): Hadronic Molecules in Effective Field Theory

abstract:
  We consider the implications from the possibility that the recently observed
state X(3872) is a meson-antimeson molecule. We write an effective Lagrangian
consistent with the heavy-quark and chiral symmetries needed to describe
X(3872). We claim that if X(3872) is a molecular bound state of D^*0 and
anti-D^0 mesons, the heavy-quark symmetry requires the existence of the
molecular bound state X_b of B^*0 and anti-B^0 with the mass of 10604 MeV.


title:
Using b-tagging to enhance the SUSY reach of the CERN Large Hadron
  Collider

abstract:
  Assuming that supersymmetry is realized with parameters in the hyperbolic
branch/focus point (HB/FP) region of the minimal supergravity (mSUGRA) model,
we show that by searching for multijet + missing E_T events with tagged b jets
the reach of experiments at the LHC may be extended by as much as 20% from
current projections. The reason for this is that gluino decays to third
generation quarks are enhanced because the lightest neutralino has substantial
higgsino components. Although we were motivated to perform this analysis
because the HB/FP region is compatible with the recent determination of the
relic density of cold dark matter, our considerations may well have a wider
applicability since decays of gluinos to third generation quarks are favoured
in a wide variety of models.


title: A test of tau neutrino interactions with atmospheric neutrinos and K2K

abstract:
  The presence of a tau component in the flux of atmospheric neutrinos inside
the Earth, due to flavor oscillations, makes these neutrinos a valuable probe
of interactions of the tau neutrino with matter. We study -- analytically and
numerically -- the effects of nonstandard interactions in the nu_e-nu_tau
sector on atmospheric neutrino oscillations, and calculate the bounds on the
exotic couplings that follow from combining the atmospheric neutrino and K2K
data. We find very good agreement between numerical results and analytical
predictions derived from the underlying oscillation physics. While improving on
existing accelerator bounds, our bounds still allow couplings of the size
comparable to the standard weak interaction. The inclusion of new interactions
expands the allowed region of the vacuum oscillation parameters towards smaller
mixing angles, 0.2 ~< sin^2 theta_{23} ~< 0.7, and slightly larger mass squared
splitting, 1.5 * 10^{-3} eV^2 ~< |\Delta m^2_{23}| ~< 4.0 * 10^{-3} eV^2,
compared to the standard case. The impact of the K2K data on all these results
is significant; further important tests of the nu_e-nu_tau exotic couplings
will come from neutrino beams experiments such as MINOS and long baseline
projects.


title:
Standard and Non-Standard Extra Matter for Non-Supersymmetric
  Unification

abstract:
  We perform a general 1-loop analysis by adding extra matter to the SM
content, as well as by allowing a non-standard U(1)Y normalization in order to
achieve unification. We find numerous solutions with U(1)Y only charged extra
matter and unification scale of the order of MU=10^{16} GeV, or with SU(2)
charged extra matter with lower MU. We next identify the SM extra matter as
originating from the breaking of SO(10) either through the Pati-Salam group
SU(4)xSU(2)LxSU(2)R or the flipped SU(5). In both cases, unification can be
achieved with a rather minimal extra content. Contrary to the one-step SU(5)
unification, in the two-step SO(10) unification we are discussing, coulored
extra matter is not necessary. Finally, we discuss a split-supersymmetry like
case, where extra matter is added to the split supersymmetric spectrum in order
to attain 1-loop unification.


title:
Probing the Neutrino Mass Hierarchy via Atmospheric $\nu_\mu + \bar
  \nu_\mu$ Survival Rates in Megaton Water Cerenkov Detectors

abstract:
  The neutrino mass hierarchy, presently unknown, is a powerful discriminator
among various classes of unification theories. We show that the $\nu_{\mu} +
\bar{\nu}_\mu$ survival rate in atmospheric events can provide a novel method
of determining the hierarchy in megaton water Cerenkov detectors. For
pathlength and energy ranges relevant to atmospheric neutrinos,this rate
obtains significant matter sensitive variations not only from resonant matter
effects in $P_{\mu e}$ but also from those in $P_{\mu\tau}$. We calculate the
expected muon event rates in the case of matter oscillations with both natural
and inverted hierarchy.We identify the energy and pathlength ranges for which
resonant matter effects can lead to observable differences between the above
two cases. We also estimate the exposure time required to observe this
difference and determine the sign of $\Delta_{31}$ in a statistically
significant manner.


title:
Probing the Flavour Structure of Supersymmetry Breaking With Rare
  B-Processes - A Beyond Leading Order Analysis

abstract:
  In the framework of minimal supersymmetry with general flavour mixing in the
squark sector we consider dominant beyond leading order (BLO) effects in the
rare processes $\bar{B}\to X_s\gamma$, $\bar{B}_s\mu^+\mu^-$ and
$\bar{B}_s-B_s$ mixing. We present analytic expressions for corrected vertices,
which are applicable in general, and provide a recipe for the inclusion of the
dominant and subdominant BLO effects in existing LO calculations. We also
derive similar expressions in the mass insertion approximation. We investigate
in more detail the focusing effect pointed out in our earlier work, which, at
large $\tan\beta$ and $\mu>0$, leads to a reduced supersymmetric contribution
to the above processes. We also find that, in some cases, flavour dependence,
that accidentally cancels at leading order, can reappear at BLO. We further
include electroweak corrections, which, while generally subdominant, in some
cases may have a substantial effect. For example, their contribution to the
charged Higgs vertex in $\bar{B}\to X_s\gamma$ can be of the order of 20% at
BLO. They can also reduce the contribution of LL insertions to
$\bar{B}_s\to\mu^+\mu^-$ and $\bar{B}_s-B_s$ mixing by up to 20%, even at the
LO. We also analyse radiative generation of CKM elements and find the
possibility that the CKM matrix elements $K_{ts}$ and $K_{cb}$ can be generated
entirely by LR insertions. This work constitutes the first complete analysis of
dominant BLO effects in the GFM scenario.


title: Pions emerging from an Arbitrarily Disoriented Chiral Condensate

abstract:
  We model the evolution of the disoriented chiral condensate formed through
both a sudden quench and through a phase transition with a metastable state of
arbitrary disorientation . We show that the total multiplicity distributions of
charged and neutral pions functions are dramatic characteristic signals for the
DCC and are related directly to the way in which the DCC forms.


title:
Study of the Fundamental Structure of Matter with an Electron-Ion
  Collider

abstract:
  We present an overview of the scientific opportunities that would be offered
by a high-energy electron-ion collider. We discuss the relevant physics of
polarized and unpolarized electron-proton collisions and of electron-nucleus
collisions. We also describe the current accelerator and detector plans for a
future electron-ion collider.


title: Relativity principle with a low energy invariant scale

abstract:
  The possibility of a modification of special relativity with an invariant
energy scale playing the role of a minimum energy is explored. Consistency with
the equivalence of different inertial frames is obtained by an appropriate
choice of a non-linear action of the Lorentz group on momentum space. Limits on
the low energy cutoff from tests of Einstein's theory and possible ways to
measure the new energy scale are discussed.


title: Threshold resummation for the prompt-photon cross section revisited

abstract:
  We study the resummation of large logarithmic perturbative corrections to the
partonic cross sections relevant for the process pp->gamma X at high transverse
momentum of the photon.These corrections arise near the threshold for the
partonic reaction and are associated with soft-gluon emission. We especially
focus on the resummation effects for the contribution to the cross section
where the photon is produced in jet fragmentation. Previous calculations in
perturbation theory at fixed-order have established that this contribution is a
subdominant part of the cross section. We find, however, that it is subject to
much larger resummation effects than the direct (non-fragmentation) piece and
therefore appears to be a significant contribution in the fixed-target regime,
not much suppressed with respect to the direct part. Inclusion of threshold
resummation for the fragmentation piece leads to some improvement in
comparisons between theoretical calculations and experimental data.


title: Invisible Quarkonium Decays as a Sensitive Probe of Dark Matter

abstract:
  We examine in a model-independent manner the measurements that can be
performed at B-factories with sensitivity to dark matter. If a singlet scalar,
pseudo-scalar, or vector is present and mediates the Standard Model - dark
matter interaction, it can mediate invisible decays of quarkonium states such
as the $\Upsilon$, $J/\Psi$, and $\eta$. Such scenarios have arisen in the
context of supersymmetry, extended Higgs sectors, solutions the supersymmetric
$\mu$ problem, and extra U(1) gauge groups from grand unified theories and
string theory. Existing B-factories running at the $\Upsilon(4S)$ can produce
lower $\Upsilon$ resonances by emitting an Initial State Radiation (ISR)
photon. Using a combination of ISR and radiative decays, the initial state of
an invisibly decaying quarkonium resonance can be tagged, giving sensitivity to
the spin and CP-nature of the particle that mediates standard model-dark matter
interactions. These measurements can discover or place strong constraints on
dark matter scenarios where the dark matter is approximately lighter than the
$b$-quark. For the decay chains $\Upsilon(nS) \to \pi^+ \pi^- \Upsilon(1S)$
(n=2,3) we analyze the dominant backgrounds and determine that with $400
fb^{-1}$ collected at the $\Upsilon(4S)$, the B-factories can limit
$BR(\Upsilon(1S) \to invisible) \lsim 0.1%$.


title:
Soft gluon contributions to the B --> K eta' amplitude in a low energy
  bosonization model

abstract:
  Intriguing B --> K eta' decays provide a unique opportunity to study a
joining of two-gluon configurations arising from the penguin b --> sG and b -->
sGG transitions, with those inherent to the eta' particle. We employ the
heavy-light chiral quark model, applied previously to a somewhat related B -->
D eta' decay, as a calculational tool accounting for the nonperturbative soft
gluon contributions to the amplitude at hand. Thereby we arrive at a novel
contribution to the singlet penguin amplitude, which within our model accounts
for ~ 10 % of the measured B --> K eta' amplitude.


title: CKM Overview and Determinations from B Decays

abstract:
  This talk gives an introduction to the Standard Model
Cabibbo-Kobayashi-Maskawa matrix and methods to extract information on the
parameters of the unitarity triangle from B decays.


title: Neutral Higgs bosons in the SU(3)$_{L}\otimesU(1)_{N}$ model

abstract:
  The SU(3)$_L\otimesU(1)_N$ electroweak model predicts new Higgs bosons beyond
the one of the standard model. In this work we investigate the signature and
production of neutral SU(3)$_L\otimesU(1)_N$ Higgs bosons in the $e^-e^+$ Next
Linear Collider (NLC) and in the CERN Linear Collider (CLIC). We compute the
branching ratios of two of the SU(3)$_L\otimesU(1)_N$ neutral Higgs bosons and
study the possibility to detect them and the $Z^\prime$ extra neutral boson of
the model.


title:
On the Unification of Gauge Symmetries in Theories with Dynamical
  Symmetry Breaking

abstract:
  We analyze approaches to the partial or complete unification of gauge
symmetries in theories with dynamical symmetry breaking. Several types of
models are considered, including those that (i) involve sufficient unification
to quantize electric charge, (ii) attempt to unify the three standard-model
gauge interactions in a simple Lie group that forms a direct product with an
extended technicolor group, and, most ambitiously, (iii) attempt to unify the
standard-model gauge interactions with (extended) technicolor in a simple Lie
group.


title: Sphalerons in the NMSSM

abstract:
  We study sphaleron solutions in the next-to-minimal supersymmetric standard
model. We find that the boundary condition on the singlet field at the origin
of the radial coordinate is of Neumann type, while the other boundary
conditions are of Dirichlet type. The sphaleron energy takes almost the same
value as in the MSSM for wide range of parameters, in spite of the negative
contribution from the cubic term in the Higgs potential.


title:
Renormalization of a gapless Hartree-Fock approximation to a theory with
  spontaneously broken O(N)-symmetry

abstract:
  The renormalization of a gapless Phi-derivable Hartree--Fock approximation to
the O(N)-symmetric lambda*phi^4 theory is considered in the spontaneously
broken phase. This kind of approach was proposed by three of us in a previous
paper in order to preserve all the desirable features of Phi-derivable
Dyson-Schwinger resummation schemes (i.e., validity of conservation laws and
thermodynamic consistency) while simultaneously restoring the Nambu--Goldstone
theorem in the broken phase. It is shown that unlike for the conventional
Hartree--Fock approximation this approach allows for a scale-independent
renormalization in the vacuum. However, the scale dependence still persists at
finite temperatures. Various branches of the solution are studied. The
occurrence of a limiting temperature inherent in the renormalized Hartree--Fock
approximation at fixed renormalization scale mu is discussed.


title: NLO-QCD Corrections to Dilepton Production in the Randall-Sundrum Model

abstract:
  The dilepton production process at hadron colliders in the Randall-Sundrum
(RS) model is studied at next-to-leading order in QCD. The NLO-QCD corrections
have been computed for the virtual graviton exchange process in the RS model,
in addition to the usual gamma, Z-mediated processes of standard Drell-Yan.
K-factors for the cross-sections at the LHC and Tevatron for differential in
the invariant mass, Q, and the rapidity, Y, of the lepton pair are presented.
We find the K-factors are large over substantial regions of the phase space.


title: From statistical physics to high energy QCD

abstract:
  I discuss recent progress in understanding the high-energy evolution in QCD,
which points towards a remarkable correspondence with the reaction-diffusion
problem of statistical physics.


title: Ground State Baryons in U(12) Scheme

abstract:
  The properties of ground-state baryons of light-quarks are investigated in
U(12)-classification scheme of hadrons, recently proposed by us. In U(12), in
addition to the ordinary 56 of SU(6)SF, the existence of the extra 56 with
positive-parity and 70 with negative-parity appear as ground-states in lower
mass region. The N(1440), Lambda(1600) and Sigma(1660) have the plausible
properties of masses and strong decay widths as the flavor-octet of extra 56,
while the ordinary radially-excited octet states are expected not to be
observed as resonances because of their large predicted widths of the decays to
extra 70 baryons. The extra 70 baryons are not observed directly as resonances
for the same reason, except for only the Lambda(1406), of which properties are
consistently explained through the singlet-octet mixing. The baryon properties
in lower mass regions are consistently explained in U(12) scheme.


title: Saturation 2005 (mini-review)

abstract:
  This talk was given at DIS'05 (Madison, April 27-May 2, 2005). It is a brief
review of ups and downs of high density QCD during the past year.


title:
Thermalization of gluons and onset of collectivity at RHIC due to gg
  <--> ggg interactions

abstract:
  A number of promising results of a new 3+1 dimensional Monte Carlo parton
cascade including inelastic multiplication processes (gg <--> ggg) are
elaborated: (1) thermalization and chemical saturation; (2) the onset of
longitudinal hydrodynamical expansion; (3) the build up of elliptic flow. We
first briefly outline the basic idea of the algorithm. Full simulations are
done with initial conditions for the kinetic partons via minijets or with ones
stemming from a color glass condensate. The inclusion of the inelastic channels
leads to a very fast kinetic equilibration and also to an early creation of
pressure.


title: New particle physics (in French)

abstract:
  The first chapter treats the Standard Model of particle physics and
electroweak symmetry breaking. Low-energy supersymmetry and its phenomenology
at future colliders are discussed in the second chapter. Neutrino physics and
lepton flavor violation appear in the third chapter. The last chapter contains
an introduction to Grand-Unification, supergravity, extra dimensions, string
theories and dark energy.


title: Relic neutrino decoupling including flavour oscillations

abstract:
  In the early universe, neutrinos are slightly coupled when electron-positron
pairs annihilate transferring their entropy to photons. This process originates
non-thermal distortions on the neutrino spectra which depend on neutrino
flavour, larger for nu_e than for nu_mu or nu_tau. We study the effect of
three-neutrino flavour oscillations on the process of neutrino decoupling by
solving the momentum-dependent kinetic equations for the neutrino spectra. We
find that oscillations do not essentially modify the total change in the
neutrino energy density, giving N_eff=3.046 in terms of the effective number of
neutrinos, while the small effect over the production of primordial 4He is
increased by O(20%), up to 2.1 x 10^{-4}. These results are stable within the
presently favoured region of neutrino mixing parameters.


title: Neutrino Physics

abstract:
  Thanks to compelling evidence that neutrinos can change flavor, we now know
that they have nonzero masses, and that leptons mix. In these lectures, we
explain the physics of neutrino flavor change, both in vacuum and in matter.
Then, we describe what the flavor-change data have taught us about neutrinos.
Finally, we consider some of the questions raised by the discovery of neutrino
mass, explaining why these questions are so interesting, and how they might be
answered experimentally,


title: On the Dynamical Origins of QCD Confinement

abstract: This paper has been withdrawn.


title:
Width Effects on Near Threshold Decays of the Top Quark t-> cWW,cZZ and
  of Neutral Higgs Bosons

abstract:
  The nonzero widths of heavy particles become significant when they appear in
the final state of any decay occurring just around its kinematical threshold.
To take into account such effects, a procedure, called the convolution method,
was proposed by Altarelli, Conti and Lubicz. We expand their study which
included only threshold effects for t-> bWZ in the standard model. We discuss
finite width effects in the three body decays t-> cWW,cZZ and A^0(h^0)->tbW in
the type III version of a two Higgs doublet model. In particular, we find a
substantial enhancement in the decay t->cZZ, which brings its branching ratio
to BR(t->cZZ)~10^-3, and in the decay A^0->tbW, which, unlike the h^0 case,
becomes competitive with the A^0 two-body decay modes.


title: Probing Planck scale physics with IceCube

abstract:
  Neutrino oscillations can be affected by decoherence induced e.g. by Planck
scale suppressed interactions with the space-time foam predicted in some
approaches to quantum gravity. We study the prospects for observing such
effects at IceCube, using the likely flux of TeV antineutrinos from the Cygnus
spiral arm. We formulate the statistical analysis for evaluating the
sensitivity to quantum decoherence in the presence of the background from
atmospheric neutrinos, as well as from plausible cosmic neutrino sources. We
demonstrate that IceCube will improve the sensitivity to decoherence effects of
${\cal O}(E^2/M_{\rm Pl})$ by 17 orders of magnitude over present limits and,
moreover, that it can probe decoherence effects of ${\cal O}(E^3/M_{\rm Pl}^2)$
which are well beyond the reach of other experiments.


title: Three Lectures on Chiral Symmetry

abstract:
  In these lectures I cover various aspects of Chiral Symmetry in the hadronic
world from a pre-QCD perspective. I also discuss the absence of spontaneous
symmetry breaking in d=4 large N O(N) models.


title: Toy model for two chiral nonets

abstract:
  Motivated by the possibility that nonets of scalar mesons might be described
as mixtures of "two quark" and "four quark" components, we further study a toy
model in which corresponding chiral nonets (containing also the pseudoscalar
partners) interact with each other. Although the "two quark" and "four quark"
chiral fields transform identically under SU(3)$_L \times$ SU(3)$_R$
transformations they transform differently under the U(1)$_A$ transformation
which essentially counts total (quark + antiquark) content of the mesons. To
implement this we formulate an effective Lagrangian which mocks up the U(1)$_A$
behavior of the underlying QCD. We derive generating equations which yield Ward
identity type relations based only on the assumed symmetry structure. This is
applied to the mass spectrum of the low lying pseudoscalars and scalars. as
well as their "excitations". Assuming isotopic spin invariance, it is possible
to disentangle the amount of"two quark" vs."four quark" content in the
pseudoscalar $\pi, K ,\eta$ type states and in the scalar $\kappa$ type states.
It is found that a small "four quark" content in the lightest pseudoscalars is
consistent with a large "four quark" content in the lightest of the scalar
$\kappa$ mesons. The present toy model also allows one to easily estimate the
strength of a "four quark" vacuum condensate. There seems to be a rich and
interesting structure.


title: Exclusive channels in semi-inclusive production of pions and kaons

abstract:
  We investigate the role of exclusive channels in semi-inclusive
electroproduction of pions and kaons. Using the QCD factorization theorem for
hard exclusive processes we evaluate the cross sections for exclusive
pseudoscalar and vector meson production in terms of generalized parton
distributions and meson distribution amplitudes. We investigate the
uncertainties arising from the modeling of the nonperturbative input
quantities. Combining these results with available experimental data, we
compare the cross sections for exclusive channels to that obtained from quark
fragmentation in semi-inclusive deep inelastic scattering. We find that rho^0
production is the only exclusive channel with significant contributions to
semi-inclusive pion production at large z and moderate Q^2. The corresponding
contribution to kaon production from the decay of exclusively produced phi and
K^* is rather small.


title: Correlations from p-p collisions at $\sqrt{s} = 200$ GeV

abstract:
  We describe a comprehensive survey of two-particle correlations from p-p
collisions at $\sqrt{s} = 200$ GeV. Correlations on transverse rapidity $y_t$
are separated into a soft component (string fragments) and a hard component
(parton fragments). Fragment correlations on transverse rapidity $y_t$ are
compared to fragmentation functions on logarithmic momentum variable $\xi$.
Cuts on transverse rapidity isolate angular correlations on $(\eta,\phi)$ for
the two components. Hard-component angular correlations are compared to results
from conventional leading-particle jet analysis. Angular correlations for
low-$p_t$ fragments, corresponding to low-$Q^2$ parton scattering, reveal a
large asymmetry about the jet thrust axis.


title: The equivalence of fluctuation scale dependence and autocorrelations

abstract:
  We define optimal per-particle fluctuation and correlation measures, relate
fluctuations and correlations through an integral equation and show how to
invert that equation to obtain precise autocorrelations from fluctuation scale
dependence. We test the precision of the inversion with Monte Carlo data and
compare autocorrelations to conditional distributions conventionally used to
study high-$p_t$ jet structure.


title: Prospects for Probing Triple Gauge-boson Couplings at the LHC

abstract:
  In these proceedings I explore one aspect of gauge-boson physics at the LHC -
Triple Gauge-boson Couplings (TGCs) in $WZ$ and Wgamma production. Methods for
extracting confidence limits on anomalous TGCs are assessed, while accounting
for the effects of higher order QCD corrections and contributions from other
theoretical and detector related systematics. Detector response has been
parametrised according to the ATLAS detector's specifications. A strategy for
reporting the anomalous coupling limits is introduced which removes the
ambiguities of form factors by reporting the limits as a function of a cutoff
operating on the diboson system invariant mass. Techniques for measuring the
energy dependence of anomalous couplings are demonstrated.


title: The littlest Higgs is a cruiserweight

abstract:
  We study the exact (one-loop) effective potential of the littlest Higgs model
and determine the dependence of physical quantities, such as the vacuum
expectation value v_W and mass m_h of the Higgs boson, on the fundamental
parameters of the Lagrangian--masses, couplings of new states, the fundamental
scale f of the sigma model, and the coefficients of operators quadratically
sensitive to the cutoff of the theory. On the one hand, we show that it is
possible to have the electroweak ground state and a relatively large cutoff
\Lambda = 4\pi f with f in the 2 TeV range without requiring unnaturally small
coefficients for quadratically divergent quantities, and with only moderate
cancellations between the contribution of different sectors to the effective
potential of the Higgs. On the other hand, this cannot be achieved while at the
same time keeping m_h close to its (bantamweight) current lower bound of 114.4
GeV. The natural expectation for m_h is O(f), mainly because of large
logarithmically divergent contributions to the effective potential of the
top-quark sector. Even a fine-tuning at the level of O(10^{-2}) in the
coefficients of the quadratic divergences is not enough to produce small
physical Higgs masses, and the natural expectation is in the 800 GeV range
(cruiserweight) for f \sim 2 TeV. We conclude that the littlest Higgs model is
a solution of the little hierarchy problem, in the sense that it stabilizes the
electroweak symmetry breaking scale to be a factor of 100 less than the cutoff
of the theory, but this requires a quite large physical mass for the Higgs, and
hence precision electroweak studies should be redone accordingly. We also study
finite temperature corrections.


title:
Single and Pair Production of Doubly Charged Higgs Bosons at Hadron
  Colliders

abstract:
  Current searches for doubly charged Higgs bosons (H^{\pm\pm}) at the Fermilab
Tevatron are sensitive to single production of H^{\pm\pm}, although the pair
production mechanism q\bar q\to H^{++}H^{--} is assumed to be dominant. In the
context of a Higgs Triplet Model we study the mechanism q'\bar q\to
H^{\pm\pm}H^{\mp} at the Tevatron and CERN Large Hadron Collider, and show that
its inclusion can significantly improve the search potential for H^{\pm\pm}.
Moreover, assuming that the neutrino mass is generated solely by the triplet
field Yukawa coupling to leptons, we compare the branching ratios of
H^{\pm\pm}\to l^\pm l^\pm and H^{\pm\pm}\to H^\pm W^* for the cases of a normal
hierarchical, inverted hierarchical and degenerate neutrino mass spectrum.


title: Transverse Momentum Correlations in Relativistic Nuclear Collisions

abstract:
  From the correlation structure of transverse momentum $p_t$ in relativistic
nuclear collisions we observe for the first time temperature/velocity structure
resulting from low-$Q^2$ partons. Our novel analysis technique does not invoke
an {\em a priori} jet hypothesis. $p_t$ autocorrelations derived from the scale
dependence of $<p_t>$ fluctuations reveal a complex parton dissipation process
in RHIC heavy ion collisions. We also observe structure which may result from
collective bulk-medium recoil in response to parton stopping.


title: Double vector meson production from the BFKL equation

abstract:
  The double vector meson production in two photon collisions is addressed
assuming that the color singlet $t$-channel exchange carries large momentum
transfer. We consider the non-forward solution of the BFKL equation at high
energy and large momentum transfer and estimate the total and differential
cross section for the process $\gamma \gamma \to V_1 V_2$, where $V_1$ and
$V_2$ can be any two vector mesons ($V_i = \rho, \omega, \phi, J/\Psi,
\Upsilon$). A comparison between our predictions and previous theoretical
results obtained at Born level or assuming the Pomeron-exchange factorization
relations is presented. Our results demonstrate that the BFKL dynamics implies
an enhancement of the cross sections. Predictions for the future linear
colliders (TESLA, CLIC and ILC) are given.


title: Thermalization vs. Isotropization & Azimuthal Fluctuations

abstract:
  Hydrodynamic description requires a local thermodynamic equilibrium of the
system under study but an approximate hydrodynamic behaviour is already
manifested when a momentum distribution of liquid components is not of
equilibrium form but merely isotropic. While the process of equilibration is
relatively slow, the parton system becomes isotropic rather fast due to the
plasma instabilities. Azimuthal fluctuations observed in relativistic heavy-ion
collisions are argued to distinguish between a fully equilibrated and only
isotropic parton system produced in the collision early stage.


title:
Studies of mu-pair and pi-pair production at the electron-positron low
  energy colliders

abstract:
  Predictions for the radiative return with the muon pair and pion pair final
state from KKMC and PHOKHARA Monte Carlo programs are compared and discussed.
The case of muon pairs is well understood, especially of the initial state
radiation (ISR), where three different second order calculations agree very
well. The case of the final state radiation (FSR) requires more tests. Matrix
element in KKMC of the EEX type with the incomplete second order NLL
corrections is not good enough for the radiative return at $Q^2<1$GeV with the
precision requirement better than 1%. A method of extending the superior
CEEX-type matrix element in KKMC to the pion pair final state is described.


title: The Dynamical Power Corrections in hadronic B decays

abstract: This paper has been withdrawn by the author due to new results to be added.


title: The MC@NLO 3.1 Event Generator

abstract:
  This is the user's manual of MC@NLO 3.1. This package is a practical
implementation, based upon the HERWIG event generator, of the MC@NLO formalism,
which allows one to incorporate NLO QCD matrix elements consistently into a
parton shower framework. Processes available in this version include the
hadroproduction of single vector and Higgs bosons, vector boson pairs, heavy
quark pairs, lepton pairs, and Higgs bosons in association with a W or Z. Spin
correlations in decays are included for all processes except ttbar, ZZ, and WZ
production. This document is self-contained, but we emphasise the main
differences with respect to previous versions.


title: Observable/Hidden Broken Symmetry for Symmetric Boundary Conditions

abstract:
  A 4-dimensional heterotic string model of free fermionic construction is
presented wherein mirror symmetry breaking between observable and hidden sector
gauge groups occurs in spite of mirror symmetry between observable and hidden
sector worldsheet fermion boundary conditions. The differentiation is invoked
by an asymmetry in GSO projections necessarily resulting from the symmetry of
the free fermionic boundary conditions. In the specific examples shown, an
expected non-chiral Pati-Salam mirror universe model is transformed into a
chiral model with enhanced hidden sector gauge symmetry and reduced observable
sector gauge symmetry: [SU(4)_C x SU(2)_L x SU(2)_R]_{obs} x [SU(4)_C x SU(2)_L
x SU(2)_R]_{hid} is necessarily transformed into a chiral [SU(4)_C x
SU(2)_L]_{obs} x [SO(10) x SU(2)_R]_{hid} model because of an unavoidable
asymmetry in GSO projections.


title: Vacuum Energy from an Extra Dimension with UV/IR Connection

abstract:
  We propose a lower limit on the size of a single discrete gravitational extra
dimension in the context of an effective field theory for massive gravitons.
The limit arises in this setup from the requirement that the Casimir energy
density of quantum fields is in agreement with the observed dark energy density
of the universe. The Casimir energy densities can be exponentially suppressed
to an almost arbitrarily small value by the masses of heavy bulk fields,
thereby allowing a tiny size of the extra dimension. This suppression is only
restricted by the strong coupling scale of the theory, which is known to be
related to the compactification scale via an UV/IR connection for local
gravitational theory spaces. We thus obtain an upper limit on the
compactification scale of the discrete gravitational extra dimension in the
range 10^7 GeV...10^12 GeV, while the strong coupling scale is by a factor 10^2
larger than the compactification scale. We also comment on a possible
cancelation of the gravitational contribution to the quantum effective
potential.


title: Short Distance Analysis of D^0-anti-D^0 Mixing

abstract:
  We study the Standard Model short-distance prediction for the mass and
lifetime differences between the two neutral D meson mass eigenstates. We find
that, despite \alpha_s/4\pi suppression, next-to-leading order (NLO)
short-distance QCD corrections exceed the corresponding leading order (LO)
amplitudes. For the lifetime difference, this stems from the lifting of
helicity suppression of a light-quark intermediate state. We find y_D is given
by y_NLO to a reasonable approximation but x_D is greatly affected by
destructive interference between x_LO and x_NLO. The net effect is to render
y_D ~ x_D ~ 6 x 10^{-7}. Our NLO short-distance results, still smaller than
most long-distance estimates, depend on the same two nonperturbative matrix
elements of four-quark operators as in leading order.


title:
Natural Nuclear Reactor Oklo and Variation of Fundamental Constants Part
  1: Computation of Neutronics of Fresh Core

abstract:
  Using modern methods of reactor physics we have performed full-scale
calculations of the natural reactor Oklo. For reliability we have used recent
version of two Monte Carlo codes: Russian code MCU REA and world wide known
code MCNP (USA). Both codes produce similar results. We have constructed a
computer model of the reactor Oklo zone RZ2 which takes into account all
details of design and composition. The calculations were performed for three
fresh cores with different uranium contents. Multiplication factors,
reactivities and neutron fluxes were calculated. We have estimated also the
temperature and void effects for the fresh core. As would be expected, we have
found for the fresh core a significant difference between reactor and Maxwell
spectra, which was used before for averaging cross sections in the Oklo
reactor. The averaged cross section of Sm-149 and its dependence on the shift
of resonance position (due to variation of fundamental constants) are
significantly different from previous results.
  Contrary to results of some previous papers we find no evidence for the
change of the fine structure constant in the past and obtain new, most accurate
limits on its variation with time:
  -4 10^{-17}year^{-1} < d alpha/dt/alpha < 3 10^{-17} year^{-1}
  A further improvement in the accuracy of the limits can be achieved by taking
account of the core burnup. These calculations are in progress.


title: Pair production of heavy Q=2/3 singlets at LHC

abstract:
  We examine the LHC discovery potential for new Q=2/3 quark singlets T in the
process gg,qq -> T Tbar -> W+ b W- bbar, with one W boson decaying hadronically
and the other one leptonically. A particle-level simulation of this signal and
its main backgrounds is performed, showing that heavy quarks with masses of 500
GeV or lighter can be discovered at the 5 sigma level after a few months of
running, when an integrated luminosity of 3 fb^-1 is collected. With a
luminosity of 100 fb^-1, this process can signal the presence of heavy quarks
with masses up to approximately 1 TeV. Finally, we discuss the complementarity
among T Tbar, Tj production and indirect constraints from precise electroweak
data in order to discover a new quark or set bounds on its mass.


title: CP violation in the $B \to K \ell^+ \ell^-$ decay

abstract:
  Standard Model (SM) CP asymmetries in $B \to K \ell^+ \ell^-$ are expected to
be very small. This feature could help in the understanding of new physics
scenarios which predict the existence of CP odd phases in various Wilson
coefficients. In this paper we have analyzed the $B \to K \ell^+ \ell^-$ decay
in beyond the SM scenarios where the Wilson coefficients have new CP odd
phases. The sensitivity of the CP asymmetries on these new weak phases is
discussed.


title:
A model of jet quenching in ultrarelativistic heavy ion collisions and
  high-pt hadron spectra at RHIC

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


title: Muon anomalous magnetic moment due to the brane-stretching effect

abstract:
  We investigate the contribution of extra dimensions to the muon anomalous
magnetic moment by using an ADD-type 6-dimensional model. This approach
analyzes the extent of the influence of classical brane fluctuations on the
magnetic moment. When we consider that the brane fluctuations are static in
time, they add new potential terms to the Schr{\"o}dinger equation through the
induced vierbein. This paper shows that the brane fluctuation is responsible
for the brane-stretching effect. This effect would be capable of reproducing
the appropriate order for recent Brookhaven National Laboratory measurements of
the muon (g-2) deviation.


title:
Quantum Electro and Chromodynamics treated by Thompson's heuristic
  approach

abstract:
  In this work we apply Thompson's method (of the dimensions and scales) to
study some features of the Quantum Electro and Chromodynamics. This heuristic
method can be considered as a simple and alternative way to the Renormalisation
Group (R.G.) approach and when applied to QED-lagrangian is able to obtain in a
first approximation both the running coupling constant behavior of alpha(mu)
and the mass m(mu).The calculations are evaluated just at d_c=4, where d_c is
the upper critical dimension of the problem, so that we obtain the logarithmic
behavior both for the coupling alpha and the excess of mass Delta m on the
energy scale mu. Although our results are well-known in the vast literature of
field theories,it seems that one of the advantages of Thompson's method, beyond
its simplicity is that it is able to extract directly from QED-lagrangian the
physical (finite) behavior of alpha(mu) and m(mu), bypassing hard problems of
divergences which normally appear in the conventional renormalisation schemes
applied to field theories like QED. Quantum Chromodynamics (QCD) is also
treated by the present method in order to obtain the quark condensate value.
Besides this, the method is also able to evaluate the vacuum pressure at the
boundary of the nucleon. This is done by assumming a step function behavior for
the running coupling constant of the QCD, which fits nicely to some quantities
related to the strong interaction evaluated through the MIT-bag model.


title:
Large Lepton Mixing and Nonsymmetric Mass Matrices with Flavor 2 <-> 3
  Symmetry

abstract:
  We analyze the lepton sector of a recently proposed nonsymmetric mass matrix
model. Our model gives a unified description of quark and lepton with the same
texture form based on an extended flavor $2 \leftrightarrow 3$ symmetry with a
phase. By investigating possible types of assignment for masses, we find that
the model can lead to large lepton mixings which are consistent with
experimental values. We also find that the model predicts a very small value,
$1.3\times10^{-10}$, for the lepton mixing matrix element square $|U_{13}|^2$.
The CP violating phases in the lepton mixing matrix and a suppression of the
averaged neutrino mass in the neutrinoless double beta decay are also
predicted.


title: Two Nucleon-States in a Chiral Quark-Diquark Model

abstract:
  We study the ground and first excited states of nucleons in a chiral
quark-diquark model. We include two quark-diquark channels of the
scalar-isoscalar and axial-vector-isovector types for the nucleon states. The
diquark correlation violating the spin-flavor SU(4)$_{SF}$ symmetry allows to
treat the two quark-diquark channels independently. Hence the two states appear
as the superpositions of the two quark-diquark channels; one is the nucleon and
the other is a state which does not appear in the SU(4)$_{SF}$ quark models.
With a reasonable choice of model parameters, the mass of the excited state
appears at around 1.5 GeV, which we identify with the Roper resonance N(1440).


title:
Dirac-Schr\"odinger equation for quark-antiquark bound states and
  derivation of its interaction kerne

abstract:
  The four-dimensional Dirac-Schr\"odinger equation satisfied by
quark-antiquark bound states is derived from Quantum Chromodynamics. Different
from the Bethe-Salpeter equation, the equation derived is a kind of first-order
differential equations of Schr\"odinger-type in the position space. Especially,
the interaction kernel in the equation is given by two different closed
expressions. One expression which contains only a few types of Green's
functions is derived with the aid of the equations of motion satisfied by some
kinds of Green's functions. Another expression which is represented in terms of
the quark, antiquark and gluon propagators and some kinds of proper vertices is
derived by means of the technique of irreducible decomposition of Green's
functions. The kernel derived not only can easily be calculated by the
perturbation method, but also provides a suitable basis for nonperturbative
investigations. Furthermore, it is shown that the four-dimensinal
Dirac-Schr\"odinger equation and its kernel can directly be reduced to rigorous
three-dimensional forms in the equal-time Lorentz frame and the
Dirac-Schr\"odinger equation can be reduced to an equivalent
Pauli-Schr\"odinger equation which is represented in the Pauli spinor space. To
show the applicability of the closed expressions derived and to demonstrate the
equivalence between the two different expressions of the kernel, the t-channel
and s-channel one gluon exchange kernels are chosen as an example to show how
they are derived from the closed expressions. In addition, the connection of
the Dirac-Schr\"odinger equation with the Bethe-Salpeter equation is discussed.


title: Nuclear target effect on dark matter detection rate

abstract:
  Expected event rates for a number of dark matter nuclear targets were
calculated in the effective low-energy minimal supersymmetric standard model,
provided the lightest neutralino is the dark matter Weakly Interacting Massive
Particle (WIMP). These calculations allow direct comparison of sensitivities of
different dark matter detectors to intermediate mass WIMPs expected from the
measurements of the DArk MAtter (DAMA) experiment.


title: Virtual QCD corrections to Higgs boson plus four parton processes

abstract:
  We report on the calculation of virtual processes contributing to the
production of a Higgs boson and two jets in hadron-hadron collisions. The
coupling of the Higgs boson to gluons, via a virtual loop of top quarks, is
treated using an effective theory, valid in the large top quark mass limit. The
calculation is performed by evaluating one-loop diagrams in the effective
theory. The primary method of calculation is a numerical evaluation of the
virtual amplitudes as a Laurent series in $D-4$, where $D$ is the
dimensionality of space-time. For the cases $H \to q\bar{q}q\bar{q}$ and $H \to
q\bar{q}q'\bar{q}'$ we confirm the numerical results by an explicit analytic
calculation.


title: t->cg, c\gamma, cZ in the Left-Right Supersymmetric Model

abstract:
  We analyse top quark flavor violating decays into a charm quark and a gluon,
photon or Z boson in a supersymmetric model incorporating left-right symmetry.
We include loop calculations involving contributions from scalar quarks,
gluinos, charginos and neutralinos. We perform the calculations first assuming
the minimal (flavor diagonal) scalar quark scenario, and then allowing for
arbitrary mixing between the second and third generation of scalar quarks, in
both the up and down sectors. In each case we present separately the
contributions from gluino, chargino and neutralino loops and compare their
respective strengths. In the flavor-diagonal case, the branching ratio cannot
exceed 10^-5 (10^-6) for the gluon (photon/Z boson); while for the
unconstrained (flavor non-diagonal) case the same branching ratios can reach
almost 10^-4 for the gluon, 10^-6 for the photon and 10^-5 for the Z boson, all
of which are slightly below the expected reach of LHC.


title:
Calculation of the Masses and the Running Masses of the Quarks and
  Leptons from Electroweak to Supersymmetric Grand Unification Mass

abstract:
  We make a systematic theoretical analysis of the masses and their variation
with energy by solving the renormalization group equation (RGE) in the Minimal
Supersymmetric Standard Model (MSSM). The unification fermion masses of around
115 GeV at GeV scale has been derived by Deo and Maharana. Here we undertake
the unfinished but the important task of calculating the masses and their
running. The unification mass and group theoretic constants for the model are
known. The top mass and its descent is studied very carefully. We find that the
Ramond,Roberts and Ross value of the Wolfenstein parameter is nearly equal to
0.22. When raised to integral powers, the whole mass spectra of the remaining
eleven fermions are obtained. We deduce formulas and plot them for all the 12
fermions as they vary from $t=log \frac{\mu}{M_z}=0$ to $t_X=33$; the GUT mass
being $M_X=2.2\times 10^{16}$ GeV.


title: Quark Asymmetries in Nucleons

abstract:
  We have developed a physical model for the non-perturbative x-shape of parton
density functions in the proton, based on Gaussian fluctuations in momenta, and
quantum fluctuations of the proton into meson-baryon pairs. The model describes
the proton structure function and gives a natural explanation of observed quark
asymmetries, such as the difference between the anti-up and anti-down sea quark
distributions and between the up and down valence distributions. We also find
an asymmetry in the momentum distribution of strange and anti-strange quarks in
the nucleon, large enough to reduce the NuTeV anomaly to a level which does not
give a significant indication of physics beyond the standard model.


title:
Rotating Resonator-Oscillator Experiments to Test Lorentz Invariance in
  Electrodynamics

abstract:
  In this work we outline the two most commonly used test theories (RMS and
SME) for testing Local Lorentz Invariance (LLI) of the photon. Then we develop
the general framework of applying these test theories to resonator experiments
with an emphasis on rotating experiments in the laboratory. We compare the
inherent sensitivity factors of common experiments and propose some new
configurations. Finally we apply the test theories to the rotating cryogenic
experiment at the University of Western Australia, which recently set new
limits in both the RMS and SME frameworks [hep-ph/0506074].


title: New Developments in FormCalc 4.1

abstract:
  FormCalc is a matrix-element generator that turns FeynArts amplitudes up to
one loop into a Fortran code for computing the squared matrix element. The
generated code can be run with FormCalc's own driver programs or used with
other `frontends', e.g. Monte Carlos. Major new or enhanced features in Version
4.1 are: treatment of external fermions, phase-space integration,
code-generation functions, extensions for the MSSM, the HadCalc frontend.


title: News from HERWIG

abstract: I review the current status and future plans of the HERWIG collaboration.


title: Neutrino wave function and oscillation suppression

abstract:
  We consider a thought experiment, in which a neutrino is produced by an
electron on a nucleus in a crystal. The wave function of the oscillating
neutrino is calculated assuming that the electron is described by a wave
packet. If the electron is relativistic and the spatial size of its wave packet
is much larger than the size of the crystal cell, then the wave packet of the
produced neutrino has essentially the same size as the wave packet of the
electron. We investigate the suppression of neutrino oscillations at large
distances caused by two mechanisms: 1) spatial separation of wave packets
corresponding to different neutrino masses; 2) neutrino energy dispersion for
given neutrino mass eigenstates. We resolve contributions of these two
mechanisms.


title:
Adiabatic compression and indirect detection of supersymmetric dark
  matter

abstract:
  Recent developments in the modelling of the dark matter distribution in our
Galaxy point out the necessity to consider some physical processes to satisfy
observational data. In particular, models with adiabatic compression, which
include the effect of the baryonic gas in the halo, increase significantly the
dark matter density in the central region of the Milky Way. On the other hand,
the non-universality in scalar and gaugino sectors of supergravity models can
also increase significantly the neutralino annihilation cross section. We show
that the combination of both effects gives rise to a gamma-ray flux arising
from the Galactic Center largely reachable by future experiments like GLAST. We
also analyse in this framework the EGRET excess data above 1 GeV, as well as
the recent data from CANGAROO and HESS. The analysis has been carried out
imposing the most recent experimental constraints, such as the lower bound on
the Higgs mass, the \bsg branching ratio, and the muon $g-2$. In addition, the
recently improved upper bound on $B(B_s \to \mu^+ \mu^-)$ has also been taken
into account. The astrophysical (WMAP) bounds on the dark matter density have
also been imposed on the theoretical computation of the relic neutralino
density through thermal production.


title: Light Composite Higgs: LCH@LHC

abstract:
  Here I summarize some of the salient features of technicolor theories with
technifermions in higher dimensional representations of the technicolor gauge
group. The expected phase diagram as function of number of flavors and colors
for the two index (anti)symmetric representation of the gauge group is
reviewed. After having constructed the simplest walking technicolor theory one
can show that it is not at odds with the precision measurements. The simplest
theory also requires, for consistency, a fourth family of heavy leptons. The
latter may result in an interesting signature at LHC. In the case of a fourth
family of leptons with ordinary lepton hypercharge the new heavy neutrino can
be a natural candidate of cold dark matter. New theories will also be proposed
in which the critical number of flavors needed to enter the conformal window is
higher than in the one with fermions in the two-index symmetric representation,
but lower than in the walking technicolor theories with fermions only in the
fundamental representation of the gauge group. Due to the near conformal/chiral
phase transition the composite Higgs is very light compared to the intrinsic
scale of the technicolor theory. For the two technicolor theory the composite
Higgs mass is predicted not to exceed 150 GeV


title: Little Higgs Models and Electroweak Measurements

abstract:
  Using effective field theory approach, we study the constraints from
electroweak data on the SU(5)/SO(5), SU(6)/SP(6), SU(3)xU(1) little Higgs
models and their variations. We construct an effective theory valid above the
electroweak symmetry breaking scale in these models that includes dimension-six
operators induced by integrating out heavy fields. We calculate the constraints
on the models using the results of hep-ph/0412166, where bounds on arbitrary
linear combinations of flavor and CP conserving dimension-six operators are
given. We present the constraints in terms of the bounds on the masses of heavy
fermions and heavy gauge bosons. The constraints are often stringent, but in
some regions of the parameter space the constraints are mild enough and do not
imply significant fine-tuning.


title:
Spin transfer and polarization of antihyperons in lepton induced
  reactions

abstract:
  We study the polarization of antihyperon in lepton induced reactions such as
$e^+e^-\to\bar H+X$ and $l+p\to l'+\bar H+X$ with polarized beams using
different models for spin transfer in high energy fragmentation processes. We
compare the results with the available data and those for hyperons. We make
predictions for future experiments.


title:
Galactic Cosmic Rays and Insolation are the Main Drivers of Global
  Climate of the Earth

abstract:
  An energy-balance model of global climate, which takes into account a
nontrivial role of galactic cosmic rays, is developed. The model is described
by the fold catastrophe equation relative to increment of temperature, where
galactic cosmic rays and insolation are control parameters. The comparison of
the results of a computer simulation of time-dependent solution of the
presented model and oxygen isotope records of deep-sea core V28-238 over the
past 730 kyr are presented. The climate evolution in future 100 kyr is also
predicted.


title: On the Neutral Scalar Sector of the General R-parity Violating MSSM

abstract:
  Starting out from the most general, gauge invariant and renormalizable scalar
potential of the R-parity violating MSSM and performing a calculable rotation
to the scalar fields we arrive at a basis where the sneutrino VEVs are zero.
The advantage of our rotation is that, in addition, we obtain diagonal soft
supersymmetry breaking sneutrino masses and all potential parameters and VEVs
real, proving that the MSSM scalar potential does not exhibit spontaneous or
explicit CP-violation at tree level. The model has five CP-even and four CP-odd
physical neutral scalars, with at least one CP-even scalar lighter than M_Z. We
parametrise the neutral scalar sector in a way that resembles the
parametrisation of the R-parity conserving MSSM, analyze its mass spectrum, the
coupling to the gauge sector and the stability of the potential.


title: Lorentz invariant ensembles of vector backgrounds

abstract:
  We consider gauge field theories in the presence of ensembles of vector
backgrounds. While Lorentz invariance is explicitely broken in the presence of
any single background, here, the Lorentz invariance of the theory is restored
by averaging over a Lorentz invariant ensemble of backgrounds, i.e. a set of
background vectors that is mapped onto itself under Lorentz transformations.
This framewkork is used to study the effects of a non-trivial but Lorentz
invariant vacuum structure or mass dimension two vector condensates by
identifying the background with a shift of the gauge field. Up to now, the
ensembles used in the literature comprise configurations corresponding to
non-zero field tensors together with such with vanishing field strength. We
find that even when constraining the ensembles to pure gauge configurations,
the usual high-energy degrees of freedom are removed from the spectrum of
asymptotic states in the presence of said backgrounds in euclidean and in
Minkowski space. We establish this result not only for the propagators to all
orders in the background and otherwise at tree level but for the full
propagator.


title: The partonic interpretation of reggeon theory models

abstract:
  We review a physical content of the two simplest models of reggeon field
theory: namely the eikonal and the Schwimmer models. The AGK cutting rules are
used to obtain the inclusive, the inelastic and the diffractive cross sections.
The system of nonlinear equations for these cross sections is written down and
analytic expressions for its solution are obtained. We derive the rapidity gap
dependence of the differential cross sections for diffractive dissociation in
the Schwimmer model and in its eikonalized extension. The results are
interpreted from the partonic viewpoint of the interaction at high energies.


title: Primordial magnetic seed fields from extra dimensions

abstract:
  Dynamical extra dimensions break the conformal invariance of Maxwell's
equations in four dimensions. A higher dimensional background with $n$
contracting extra dimensions and four expanding dimensions is matched to an
effectively four dimensional standard radiation dominated universe. The
resulting spectrum for the magnetic field is calculated taking into account
also the momenta along the extra dimensions. Imposing constraints from
observations an upper limit on the strength of magnetic seed fields is found.
Depending on the number of extra dimensions, cosmologically interesting
magnetic fields can be created.


title:
Analytic evaluation of the amplitudes for orthopositronium decay to
  three photons to one-loop order

abstract:
  The matrix element for the decay of orthopositronium to three photons can be
expressed in terms of three independent amplitudes. We describe the analytic
evaluation of these amplitudes, both to lowest order and with the inclusion of
all one-loop corrections. We use these amplitudes to find precise values for
the one-loop correction to the orthopositronium decay rate
Gamma_1=-10.286606(10) (alpha/pi) Gamma_{LO}, and for the order-alpha^2
"square" correction to the decay rate Gamma_2(square) = 28.860(2) (alpha/pi)^2
Gamma_{LO}, where Gamma_{LO} is the lowest order rate. We give in explicit form
the function describing the one-loop correction to the distribution in phase
space of the final state photons.


title: Gluino Decays in Split Supersymmetry

abstract:
  We compute the gluino lifetime and branching ratios in Split Supersymmetry.
Using an effective-theory approach, we resum the large logarithmic corrections
controlled by the strong gauge coupling and the top Yukawa coupling. We find
that the resummation of the radiative corrections has a sizeable numerical
impact on the gluino decay width and branching ratios. Finally, we discuss the
gluino decays into gravitino, relevant in models with direct mediation of
supersymmetry breaking.


title: Growth of a susy bubble: inhomogeneity effects

abstract:
  In a dense star, the Pauli exclusion principle functions as an enormous
energy storage mechanism. Supersymmetry could provide a way to recapture this
energy. If there is a transition to an exactly supersymmetric (susy) phase, the
trapped energy can be released with consequences similar to gamma ray burst
observations. Previous zeroth order calculations have been based on the
behavior in a prototypical white dwarf of solar mass and earth radius (such as
Sirius B) and have neglected density inhomogeneity. In this article we show
that the effects of density inhomogeneity and of variations in masses and radii
are substantial enough to encourage further exploration of the susy star model.
In addition, the effects discussed here have possible applications to the
growth of bubbles in other phase transition models in dense matter.


title: Neutrino Constraints on Spontaneous Lorentz Violation

abstract:
  We study the effect of spontaneous Lorentz violation on neutrinos. We
consider two kinds of effects: static effects, where the neutrino acquires a
Lorentz-violating dispersion relation, and dynamic effects, which arise from
the interactions of the neutrino with the Goldstone boson of spontaneous
Lorentz violation. Static effects are well detailed in the literature. Here,
special emphasis is given to the novel dynamic effect of Goldstone-Cerenkov
radiation, where neutrinos moving with respect to a preferred rest frame can
spontaneously emit Goldstone bosons. We calculate the observable consequences
of this process and use them to derive experimental bounds from SN1987A and the
CMBR. The bounds derived from dynamic effects are complementary to - and in
many cases much stronger than - those obtained from static effects.


title: On the Tuning Condition of Split Supersymmetry

abstract:
  Split Supersymmetry does not attempt to solve the hierarchy problem, but it
assumes a tuning condition for the electroweak scale. We clarify the meaning of
this condition and show how it is related to the underlying parameters. Simple
assumptions on the structure of the soft terms lead to predictions on tan beta
and on the physical Higgs mass.


title: Distorting the Hump-backed Plateau of Jets with Dense QCD Matter

abstract:
  The hump-backed plateau of the single inclusive distribution of hadrons
inside a jet provides a standard test of the interplay between probabilistic
parton splitting and quantum coherence in QCD. The medium-induced modification
of this QCD radiation physics is expected to give access to the properties of
the dense medium produced in relativistic heavy ion collisions. Here, we
introduce a formulation of medium-induced parton energy loss, which treats all
leading and subleading parton branchings equally, and which - for showering in
the vacuum - accounts for the observed distribution of soft jet fragments. We
show that the strong suppression of single inclusive hadron spectra measured in
Au-Au collisions at the Relativistic Heavy Ion Collider (RHIC) implies a
characteristic distortion of the hump-backed plateau; we determine, as a
function of jet energy, to what extent the soft jet fragments can be measured
above some momentum cut. Our study further indicates that the approximate
pT-independence of the measured nuclear modification factor does not exclude a
significant Q^2-dependence of parton energy loss.


title: Excited D_s (and Pentaquarks) in Chiral Perturbation Theory

abstract:
  I present results of a heavy hadron chiral perturbation theory analysis of
the decays and masses of the recently discovered excited charm mesons. The
present data on the electromagnetic branching ratios are consistent with heavy
quark symmetry predictions and disfavor a molecular interpretation of these
states. I also discuss model independent predictions for the strong decays of
pentaquarks in the 10-bar representation of SU(3) which can be used to
constrain the angular momentum and parity quantum numbers of these states.


title:
Properties of the vector meson nonet at large N_c beyond the chiral
  limit

abstract:
  Masses and especially coupling constants of the vector meson nonet are
determined in the large-N_c limit, but beyond the chiral limit taking into
account terms up to quadratic order in the Goldstone boson masses. With two
input parameters five coupling constants for hadronic and dilepton decays are
determined which agree very well with the experimental results. The obtained
parameters are also used to calculate the pion and kaon decay constant in the
large-N_c limit. A consistent picture is only obtained, if the correct
assignment of the N_c-dependence of the electromagnetic charges of the quarks
is taken into account.


title: Exotic Acceleration Processes and Fundamental Physics

abstract:
  Gamma-ray bursts and ultra-high-energy cosmic rays provide an important
testing ground for fundamental physics. A simple-minded analysis of some
gamma-ray bursts would lead to a huge estimate of the overall energy emitted,
and this represents a potential challenge for modelling the bursts. Some cosmic
rays have been observed with extremely high energies, and it is not easy to
envision mechanisms for the acceleration of particles to such high energies.
Surprisingly some other aspects of the analysis of gamma-ray bursts and
ultra-high-energy cosmic rays, even before reaching a full understanding of the
mechanisms that generate them, can already be used to explore new ideas in
fundamental physics, particularly for what concerns the structure of spacetime
at short (Planckian) distance scales.


title: $B\to\chi_{c1}(1P,2P)K$ decays in QCD factorization and X(3872)

abstract:
  $B\to\chi_{c1}(1P,2P)K$ decays are studied in QCD factorization by treating
charmonia as nonrelativistic bound states. No infrared divergences exist in the
vertex corrections, while the logarithmic end-point singularities in the hard
spectator corrections can be regularized by a momentum cutoff. With certain
uncertainties we find that the $B\to\chi_{c1}(2P)K$ decay rate can be
comparable to $B\to\chi_{c1}(1P)K$, and get $Br(B^0 \to \chi_{c1}' K^0) =Br(B^+
\to \chi_{c1}' K^+)\approx 2\times 10^{-4}$. This might imply a possible
interpretation for the newly discovered X(3872) that this state has a dominant
$J^{PC} = 1^{++}(2P)$ $c\bar c$ component but mixed with a substantial
$D^0\bar{D}^{*0}+D^{*0}\bar{D}^0$ continuum component.


title: R-symmetries from higher dimensions

abstract:
  The supersymmetric extensions of the Standard Model can tolerate quite a
large hierarchy between various supersymmetry breaking terms, a good example
being the models of split supersymmetry. However, theoretical models generating
such a stable hierarchy are not so easy to construct. An interesting idea
consists in coupling the brane localized gauge sector to extended
supergravities in the bulk of extra dimensions, and using different sources of
supersymmetry breaking in the bulk and on the brane. This in principle allows
one to separate the magnitude of the gravitino mass from the supersymmetry
breaking masses of gaugini and of charged matter. In this paper we present a
detailed analysis of a simple field theoretical model where such an idea is
realized. Departure from this symmetric set of boundary conditions breaks
R-symmetry, and gaugino masses are generated at one-loop order, however the
magnitude of the resulting soft gaugino masses is proportional to the
R-symmetry breaking Majorana-type gravitino mass which is continously
deformable to zero.


title: Strong Phases in the Decays B to pi pi

abstract:
  Two sources of strong phases in the decays $B$ to $\pi\pi$ are identified:
(1) "quasi-elastic scattering" corresponding to intermediate states like
$\pi\pi$ and $\rho\rho$, (2) ``$c\bar{c}$'' corresponding to intermediate
states like $D\bar{D}$ and $D^{*}\bar{D}^{*}$. Possibilities of using data to
identify these two sources are discussed and illustrated. Present data suggests
both sources may be significant.


title:
Universality of the Collins-Soper-Sterman nonperturbative function in
  gauge boson production

abstract:
  We revise the $b_*$ model for the Collins-Soper-Sterman resummed form factor
to improve description of the leading-power contribution at nearly
nonperturbative impact parameters. This revision leads to excellent agreement
of the transverse momentum resummation with the data in a global analysis of
Drell-Yan lepton pair and Z boson production. The nonperturbative contributions
are found to follow universal quasi-linear dependence on the logarithm of the
heavy boson invariant mass, which closely agrees with an estimate from the
infrared renormalon analysis.


title: B-meson distribution amplitudes

abstract:
  B-meson light-cone distribution amplitudes are discussed in these lectures in
the framework of HQET. The evolution equation for the leading-twist
distribution amplitude is derived in one-loop approximation. QCD sum rules for
distribution amplitudes are discussed.


title: Conditions for CP-Violation in the General Two-Higgs-Doublet Model

abstract:
  The most general Higgs potential of the two-Higgs-doublet model (2HDM)
contains three squared-mass parameters and seven quartic self-coupling
parameters. Among these, one squared-mass parameter and three quartic coupling
parameters are potentially complex. The Higgs potential explicitly violates CP
symmetry if and only if no choice of basis exists in the two-dimensional Higgs
``flavor'' space in which all the Higgs potential parameters are real. We
exhibit four independent potentially complex invariant (basis-independent)
combinations of mass and coupling parameters and show that the reality of all
four invariants provides the necessary and sufficient conditions for an
explicitly CP-conserving 2HDM scalar potential. Additional potentially complex
invariants can be constructed that depend on the Higgs field vacuum expectation
values (vevs). We demonstrate how these can be used together with the
vev-independent invariants to distinguish between explicit and spontaneous
CP-violation in the Higgs sector.


title: Testing the dynamics of B -> \pi\pi and constraints on \alpha

abstract:
  In charmless nonleptonic B decays to \pi\pi or \rho\rho, the "color allowed"
and "color suppressed" tree amplitudes can be studied in a systematic expansion
in \alphas(mb) and \Lambda/mb. At leading order in this expansion their
relative strong phase vanishes. The implications of this prediction are
obscured by penguin contributions. We propose to use this prediction to test
the relative importance of the various penguin amplitudes using experimental
data. The present B->\pi\pi data suggest that there are large corrections to
the heavy quark limit, which can be due to power corrections to the tree
amplitudes, large up-quark penguin amplitude, or enhanced weak annihilation.
Because the penguin contributions are smaller, the heavy quark limit is more
consistent with the B->\rho\rho data, and its implications may become important
for the extraction of \alpha from this mode in the future.


title: Constraining Gravitino Dark Matter with the Cosmic Microwave Background

abstract:
  We consider super-gravity models in which the lightest supersymmetric
particle (LSP) is a stable gravitino. The next-to-lightest supersymmetric
particle (NLSP) freezes out with its thermal relic density and then decays
after $(10^5-10^{10})$ sec, injecting high-energy photons into the cosmic
plasma. These photons heat up the electron plasma which then thermalizes with
the cosmic microwave background (CMB) via Compton scattering, bremsstrahlung
and double-Compton scattering. Contrary to previous studies which assume
instantaneous energy injection, we solve the full kinetic equation for the
photon number density with a source term describing the decay of the NLSP. This
source term is based on the requirement that the injected energy be almost
instantaneously redistributed by Compton scattering, hence leading to a
time-dependent chemical potential. We investigate the case of a stau NLSP and
determine the constraints on the gravitino and stau masses from observations of
the CMB spectrum by assuming that all gravitino LSPs come from stau NLSP
decays. Unlike the analytical approximations, we find that there may be a stau
mass below which the constraint from the CMB spectrum vanishes.


title: Weak Interaction Sum Rules for Polarized top-antitop Production at LHC

abstract:
  We consider two polarization asymmetries in the process of top-antitop
production at LHC. We show that the theoretical predictions for these two
quantities, at the strong and electroweak partonic one-loop level, are free of
QCD and QED effects. At this perturbative level we derive two sum rules, that
relate measurable quantities of top-antitop production to genuinely weak
inputs. This would allow to perform two independent tests of the candidate
theoretical model, with a precision that will be fixed by the future
experimental accuracies of the different polarization measurements. A tentative
quantitative illustration of this statement for a specific MSSM scenario is
enclosed, and a generalization to include two other future realistic
measurements is also proposed.


title: Comment on physical-scalar mediated contribution to fermion self energy

abstract:
  We calculate the physical scalar contribution to the fermionic self energy
matrix at one loop. We make a comment about the difference of our results from
those in the existing literature.


title:
Parton Ladder Splitting and the Rapidity Dependence of Transverse
  Momentum Spectra in Deuteron-Gold Collisions at RHIC

abstract:
  We present a phenomenological approach (EPOS), based on the parton model, but
going much beyond, and try to understand proton-proton and deuteron-gold
collisions, in particular the transverse momentum results from all the four
RHIC experiments. It turns out that elastic and inelastic parton ladder
splitting is the key issue. Elastic splitting is in fact related to screening
and saturation, but much more important is the inelastic contribution, being
crucial to understand the data. We investigate in detail the rapidity
dependence of nuclear effects, which is actually relatively weak in the model,
in perfect agreement with the data, if the latter ones are interpreted
correctly.


title:
Coincidence probability as a measure of the average phase-space density
  at freeze-out

abstract:
  It is pointed out that the average semi-inclusive particle phase-space
density at freeze-out can be determined from the coincidence probability of the
events observed in multiparticle production. The method of measurement is
described and its accuracy examined.


title: Phases of QCD: lattice thermodynamics and a field theoretical model

abstract:
  We investigate three-colour QCD thermodynamics at finite quark chemical
potential. Lattice QCD results are compared with a generalized Nambu
Jona-Lasinio model in which quarks couple simultaneously to the chiral
condensate and to a background temporal gauge field representing Polyakov loop
dynamics. This so-called PNJL model thus includes features of both
deconfinement and chiral symmetry restoration. The parameters of the Polyakov
loop effective potential are fixed in the pure gauge sector. The chiral
condensate and the Polyakov loop as functions of temperature and quark chemical
potential are calculated by minimizing the thermodynamic potential of the
system. The resulting equation of state, (scaled) pressure difference and quark
number density at finite quark chemical potential are then confronted with
corresponding Lattice QCD data.


title:
Deformed Spectral Representation of the BFKL Kernel and the Bootstrap
  for Gluon Reggeization

abstract:
  We investigate the space of functions in which the BFKL kernel acts. For the
amplitudes which describe the scattering of colorless projectiles it is
convenient to define, in transverse coordinates, the Moebius space in which the
solutions to the BFKL equation vanish as the coordinates of the two reggeized
gluons coincide. However, in order to fulfill the bootstrap relation for the
BFKL kernel it is necessary to modify the space of functions. We define and
investigate a new space of functions and show explicitly that the bootstrap
relation is valid for the corresponding spectral form of the kernel. We
calculate the generators of the resulting deformed representation of the
sl(2,C) algebra.


title:
Extraction of radiative decay width for the non-strange partner of
  Theta^+

abstract:
  Using the results of the GRAAL collaboration on the \eta photoproduction from
the neutron target, we attempt to extract the partial radiative width of the
possible new nucleon resonance N^*(1675). The obtained estimates support this
resonance to be a very attractive candidate for the non-strange member of the
exotic antidecuplet of baryons -- a partner of the \Theta^+ pentaquark. Our
phenomenological value for the transition magnetic moment \mu(n^* n), appears
to be in good agreement with predictions of the Chiral Quark Soliton Model.


title: Physics and optimization of beta-beams: From low to very high gamma

abstract:
  The physics potential of beta beams is investigated from low to very high
gamma values and it is compared to superbeams and neutrino factories. The gamma
factor and the baseline are treated as continuous variables in the optimization
of the beta beam, while a fixed mass water Cherenkov detector or a totally
active scintillator detector is assumed. We include in our discussion also the
gamma dependence of the number of ion decays per year. For low gamma, we find
that a beta beam could be a very interesting alternative to a superbeam
upgrade, especially if it is operated at the second oscillation maximum to
reduce correlations and degeneracies. For high gamma, we find that a beta beam
could have a potential similar to a neutrino factory. In all cases, the
sensitivity of the beta beams to CP violation is very impressive if similar
neutrino and anti-neutrino event rates can be achieved.