title:
Dynamical study of the pentaquark antidecuplet in a constituent quark
  model

abstract:
  Dynamical calculations are performed for all members of the flavor
antidecuplet to which the pentaquark $\Theta^+$ belongs. The framework is a
constituent quark model where the short-range interaction has a flavor-spin
structure. From symmetry considerations the lowest state acquires a positive
parity. By fitting the mass of $\Theta^+$ of minimal content $uudd\bar{s}$, the
mass of $\Xi^{--}$, of minimal content $ddss \bar{u}$, is predicted to be
approximately 1960 MeV. It is shown that the octet and antidecuplet states with
the same quantum numbers mix ideally due to SU(3)$_F$ breaking.


title: Lower-dimension vacuum defects in lattice Yang-Mills theory

abstract:
  We overview lattice data on d=1,2,3 vacuum defects in four-dimensional
gluodynamics. In all the cases defects have total volume which scales in
physical units (with zero fractal dimension). In case of d=1,2 the defects are
distinguished by ultraviolet divergent non-Abelian action as well. This
sensitivity to the ultraviolet scale allows to derive from the continuum theory
strong constraints on the properties of the defects. The constraints turn to be
satisfied by the lattice data. In the SU(2) case we introduce a classification
scheme of the defects which allows to (at least) visualize the defect
properties in a simple and unified way. Not-yet-checked relation of the defects
to the spontaneous chiral symmetry breaking is suggested by the scheme.


title: Proton Decay and the Planck Scale

abstract:
  Even without grand unification, proton decay can be a powerful probe of
physics at the highest energy scales. Supersymmetric theories with conserved
R-parity contain Planck-suppressed dimension 5 operators that give important
contributions to nucleon decay. These operators are likely controlled by flavor
physics, which means current and near future proton decay experiments might
yield clues about the fermion mass spectrum. I present a thorough analysis of
nucleon partial lifetimes in supersymmetric one-flavon Froggatt-Nielsen models
with a single U(1)_X family symmetry which is responsible for the fermionic
mass spectrum as well as forbidding R-parity violating interactions. Many of
the models naturally lead to nucleon decay near present limits without any
reference to grand unification.


title:
Mixing-Induced CP Violation in B -> P_1 P_2 gamma in Search of Clean New
  Physics Signals

abstract:
  We show that in a decay of the form B_d or B_s-> P_1 P_2 gamma (where P_1 and
P_2 are pseudoscalar mesons), through a flavor changing dipole transition, time
dependent oscillations can reveal the presence of physics beyond the Standard
Model. If P_1 and P_2 are CP eigenstates (e.g. as in B_d -> K_S pi0 gamma), the
oscillation is independent of the resonance structure. Thus data from
resonances as well as from nonresonant decays can be included. This may
significantly enhance the sensitivity to new physics of the method. If P_1 is a
charged particle, and P_2 its anti-particle (e.g. as in B_d -> pi+ pi- gamma),
one has the additional advantage that both the magnitude and the weak phase of
any new physics contribution can be determined from a study of the angular
distribution. These signals offer excellent ways to detect new physics because
they are suppressed in the Standard Model. We also show that the potential
contamination of these signals originating from the Standard Model annihilation
diagram gives rise to photons with, to a very good approximation, the same
helicity as the dominant penguin graph and thus causes no serious difficulty.


title: Neutrino masses in SU(5) grand unified model

abstract:
  A grand unified model based on SU(5) and supersymmetryis presented to account
for the masses and mixing of the neutrinos observed in experiments.


title: CP violation in supersymmetric seesaw models

abstract:
  In supersymmetric (SUSY) extensions of the seesaw mechanism the neutrino
Yukawa interaction induces the flavor and CP violating sfermion mass terms via
the radiative correction. In this article we review the CP violating phenomena
in the SUSY seesaw models.


title:
Non-perturbative corrections to perturbative results pertaining to a
  four-point Sudakov process in QCD

abstract:
  Within the framework of the Fock-Feynman-Schwinger (equivalently, worldline)
casting of QCD a four-point process, mediated by a closed quark loop, is
studied in the Sudakov kinematical region, first perturbatively and
subsequently with the inclusion of non-perturbative contributions through the
use of the stochastic vacuum model. Deformations of the, first order,
perturbative results are determined. Finally, the resummation of the leading
logarithmic terms is performed and physical implications of the result are
discussed.


title: Semi-Inclusive DIS and Transversity

abstract:
  A review is presented of some aspects of semi-inclusive deeply inelastic
scattering and transversity. In particular, the role of $k_T$-dependent and
higher-twist (or multi-parton) distributions in generating single-spin
asymmetries is discussed.


title: Application of chiral quark models to high-energy processes

abstract:
  We discuss the predictions of chiral quark models for basic pion properties
entering high-energy processes: generalized parton distributions (GPD's) and
unintegrated parton distributions (UPD's). We stress the role of the QCD
evolution, necessary to compare the predictions to data.


title:
Octet, decuplet and antidecuplet magnetic moments in the chiral quark
  soliton model revisited

abstract:
  We reanalyse the magnetic moments of the baryon octet, decuplet, and
antidecuplet within the framework of the chiral quark-soliton model, with SU(3)
symmetry breaking taken into account. We consider the contributions of the
mixing of higher representations to the magnetic moment operator arising from
the SU(3) symmetry breaking. Dynamical parameters of the model are fixed by
experimental data for the magnetic moments of the baryon octet and from the
masses of the octet, decuplet and of $\Theta^{+}$. The magnetic moment of
$\Theta^{+}$ depends rather strongly on the pion-nucleon sigma term and reads
$-1.19 {\rm n.m.}$ to $-0.33 {\rm n.m.}$ for $\Sigma_{\pi N} = 45$ and 75 MeV
respectively. The recently reported mass of $\Xi^{--}_{\bar{10}}(1862)$ is
compatible with $\Sigma_{\pi N} = 73$ MeV. As a byproduct the strange magnetic
moment of the nucleon is obtained with a value of $\mu^{(s)}_N =+0.39$ n.m.


title: Higgsinos as carriers of SUSY residual effects

abstract:
  New version of the MSSM scales is discussed. In this version mu << M_{SUSY} ~
M_0 ~ M_{1/2}, where mu is the Higgsino mass, M_0 is the mass scale of sleptons
and squarks, M_{1/2} is the mass scale of gaugino. Renormalization group
motivation of this MSSM version is proposed. The radiation corrections give
main contribution to the splitting of neutralino and chargino masses if
M_{SUSY} > 10^7 GeV. Calculation of the mass difference has led to the value
M_{chi_1^\pm}-M_{chi_{1,2}^0} ~ 360 MeV at M_{chi} ~ mu ~ 3 TeV. The mean life
time of charged Higgsino in this model is tau_{chi_1^\pm} ~ 0.4 * 10^{-9} s.
The analysis of the residual neutralino concentration in the cosmological
plasma is developed and the value of Higgsino mass is estimated: M_{chi} ~ 3
TeV. Formation of the residual neutralino concentration occurs in the high
symmetric phase of the cosmological plasma. Problems of the relic Higgsinos
searches at the underground laboratory NUSEL and Galactic neutralino
annihilation radiation at the satellite detector GLAST are discussed.


title:
A Study of Lepton Flavor Violating $\mu N (e N) \to \tau X$ Reactions in
  Supersymmetric Models

abstract:
  We study a lepton flavor violating $\mu N \to \tau X$ reaction in deep
inelastic scattering region in supersymmetric models. The contribution from the
Higgs boson mediation could be important for this reaction. For that case, the
cross section is constrained by the experimental limit of the pseudo-scalar
coupling from $\tau \to \mu\eta$ decays. We find that at a muon energy
($E_{\mu}$) higher than 50 GeV, the predicted cross section increases
significantly due to the contribution from sea $b$-quarks. As a result, with
$10^{20}$ muons per year, at most a number of $\mathcal{O}(10^4)$ is expected
for $\mu N \to \tau X$ events at $E_{\mu}$= 300 GeV, whereas
$\mathcal{O}(10^2)$ events are given at $E_{\mu}= 50$ GeV. Furthermore, the
$\mu N \to \tau X$ phenomenology, in particular that for the signal and
backgrounds, is briefly discussed. Another promising possibility to search for
the $e N \to \tau X$ reaction at an electron-positron linear collider is also
discussed. Searches for these reactions would be competitive to studies of rare
tau decays and have potential to improve sensitivities to lepton flavor
violation significantly.


title: Jets in nuclear collisions

abstract:
  Ultra-relativistic heavy ion collisions at RHIC and the LHC open exciting new
possibilities for jet physics studies in the presence of hot and dense nuclear
matter. Recent theoretical advances in understanding the QCD multi-parton
dynamics provide a good description of the quenching in the single and double
inclusive high-pT hadron spectra. Measurement of the redistribution of the lost
energy and the corresponding increase in the soft hadron multiplicities is the
next critical step in elucidating the modification of the jet properties in the
nuclear environment.


title: Sum rules for B^0 - \bar B^0 mixing at NLO of pQCD

abstract:
  The matrix element of B^0 -\bar B^0 mixing is evaluated from QCD sum rules
for three-point correlators with next-to-leading order accuracy in pQCD.


title: Effective field theories for heavy quarkonium

abstract:
  We review recent theoretical developments in heavy quarkonium physics from
the point of view of Effective Field Theories of QCD. We discuss
Non-Relativistic QCD and concentrate on potential Non-Relativistic QCD. Our
main goal will be to derive QCD Schr\"odinger-like equations that govern the
heavy quarkonium physics in the weak and strong coupling regime. We also
discuss a selected set of applications, which include spectroscopy, inclusive
decays and electromagnetic threshold production.


title: New physics from Higgs self-coupling measurement

abstract:
  Radiative correction to the triple Higgs boson coupling is studied in the two
Higgs doublet model in connection with the electroweak baryogenesis. It is
shown that the one loop correction is large enough to be identified in future
linear collider experiments, if the baryon number of the Universe is generated
at the first order electroweak phase transition.


title:
Uncertainties in the Prediction of the Relic Density of Supersymmetric
  Dark Matter

abstract:
  We investigate how well the relic density of dark matter can be predicted in
mSUGRA. We determine the parameters to which the relic density is most
sensitive and quantify the collider accuracy needed to match the accuracy of
WMAP and PLANCK.


title: Single-spin asymmetries: the Trento conventions

abstract:
  During the workshop "Transversity: New Developments in Nucleon Spin
Structure" (ECT*, Trento, Italy, 14-18 June 2004), a series of recommendations
was put forward by the participants concerning definitions and notations for
describing effects of intrinsic transverse momentum of partons in
semi-inclusive deep inelastic scattering.


title: Problem of Light Scalar Mesons

abstract:
  The following topics are considered. 1. Confinement, chiral dynamics and
light scalar mesons. 2. $\phi$-meson radiative decays about nature of light
scalar resonances. Arguments in favor of the four-quark model of the $a_0(980)$
and $f_0(980)$ mesons are given.


title: Octet contributions in radiative upsilon decays

abstract:
  We analyze the end-point region of the photon spectrum in semi-inclusive
radiative decays of very heavy quarkonium (m alpha_s^2 >> Lambda_QCD). The S-
and P-wave octet shape functions are calculated. When they are included in the
analysis of the photon spectrum of the Upsilon (1S) system the agreement with
data becomes excellent.


title: Polyakov Loop at Finite Temperature in Chiral Quark Models

abstract:
  At finite temperature, chiral quark models do not incorporate large gauge
invariance which implies genuinely non-perturbative finite temperature gluonic
degrees of freedom. Motivated by this observation, we describe how the coupling
of the Polyakov loop as an independent degree of freedom to quarks not only
accounts for large gauge invariance, but also allows to establish in a
dynamical way the interaction between composite hadronic states such as
Goldstone bosons to finite temperature non-perturbative gluons in a medium
which can undergo a confinement-deconfinement phase transition.


title: CP sensitive observables in chargino production and decay into a W boson

abstract:
  We study CP sensitive observables in chargino production in electron-positron
collisions with subsequent two-body decay of one chargino into a W boson. We
identify the CP odd elements of the W boson density matrix and propose CP
sensitive triple-product asymmetries of the chargino decay products. We
calculate the density-matrix elements, the CP asymmetries and the cross
sections in the Minimal Supersymmetric Standard Model with complex parameters
\mu and M_1 for an e+ e- linear collider with \sqrt{s} = 800 GeV and
longitudinally polarized beams. The asymmetries can reach 7% and we discuss the
feasibility of measuring these asymmetries.


title: Resummed event shapes at hadron colliders

abstract:
  We present recently defined jet-observables for hadron-hadron dijet
production, which are designed to reconcile the seemingly conflicting
theoretical requirement of globalness, which makes it possible to resum them
(automatically) at NLL accuracy and the limited experimental reach of
detectors, so that they are measurable at the Tevatron and at the LHC.


title: Effects of Flavor Violation on Split Supersymmetry

abstract:
  We discuss consequences of flavor mixings in the scalar fermion sector of
supersymmetric models endowed with ultra heavy scalars. We find that, under
extreme fine-tunings different than but similar in size to that needed to
obtain a light Higgs doublet, intergenerational mixings generically lead to
light sfermion states which facilitate a number of phenomena ranging from rare
processes to electric dipole moments. The number of scalar fermions to be
discovered by collider searches is fewer than those in a complete
supersymmetric model.


title: Higgs picture of the QCD-vacuum

abstract:
  The functional integral for QCD is reformulated by introducing explicitly an
integration over the fluctuations of composite quark-antiquark bound states.
Chiral symmetry breaking by the color singlet scalar field induces masses for
the fermions. Our formulation with scalar fluctuations may be useful for
lattice gauge theories by modifying the spectrum of the Dirac operator in the
vacuum and permitting a simple connection to chiral perturbation theory. We
propose that a ``condensate'' of quark-antiquark bound states in the color
octet channel generates masses of the gluons by the Higgs mechanism. A simple
effective action for quarks, gluons and (composite) scalars yields a
surprisingly good description of the charges, masses and interactions of all
low mass physical excitations - baryons, pseudoscalars and vector mesons.
Dressed quarks appear as baryons and dressed gluons as vector mesons.


title:
New Application of the large-Nc expansion : comparison of the Gottfried
  and Adler sum rules

abstract:
  The Adler sum rule for deep inelastic neutrino scattering measures the
isospin of the nucleus, and is hence exact. In contrast the Gottfried sum rule
for charged lepton scattering does receive perturbative and non-perturbative
corrections. We show that at two-loop level the Gottfried sum rule is
suppressed by a factor 1/Nc^2 relative to higher moments, and we conjecture
that this suppression holds to all-orders, and also for higher-twist effects.
It is further noted that differences between radiative corrections for higher
moments of neutrino and charged lepton deep inelastic scattering, are 1/Nc^2
suppressed at two-loops, and this is also conjectured to hold to all-orders.
The 1/Nc^2 suppression of corrections to the Gottfried sum rule makes it
plausible that the deviations from the parton model value are dominated by a
light quark flavour asymmetry in the nucleon sea. This asymmetry indeed
persists as Nc-->infinity as predicted in a chiral soliton model.


title: The Pentaquarks in the Linear Molecular Heptaquark Model

abstract:
  In this talk, multiquarks are studied microscopically in a standard quark
model. In pure ground-state pentaquarks the short-range interaction is computed
and it is shown to be repulsive. An additional quark-antiquark pair is then
considered, and this is suggested to produce linear molecular system, with a
narrow decay width. The quarks assemble in three hadronic clusters, and the
central hadron provides stability. The possible crypto-heptaquark hadrons with
exotic pentaquark flavours, with strange, charmed and bottomed quarks, are
predicted.


title: Form factors and branching ratio for the B -> l nu gamma decay

abstract:
  Form factors parameterizing radiative leptonic decays of heavy mesons $%
(B^{+}\to \gamma l^{+}\nu_{l}) $ for photon energy are computed in the language
of dispersion relation. The contributing states to the absorptive part in the
dispersion relation are the multiparticle continum, estimated by quark triangle
graph and resonances with quantum numbers $1^{-}$ and $1^{+}$ which includes
$B^{*}$ and $B_{A}^{*}$ and thier radial excitations, which model the higher
state contributions. Constraints provided by the asymptotic behavior of the
structure dependent amplitude, Ward Identities and gauge invariance are used to
provide useful information for parameters needed. The couplings
$g_{BB^{*}\gamma}$ and $% f_{BB_{A}^{*}\gamma}$ are predicted if we restrict to
first radial excitation; otherwise using these as an input the radiative decay
coupling constants for radial excitations are predicted. The value of the
branching ratio for the process $B^{+}\to \gamma \mu ^{+}\nu_{\mu}$ is found to
be in the range $0.5\times 10^{-6}$. A detailed comparison is given with other
approaches.


title:
Wilson Lines in Warped Space: Dynamical Symmetry Breaking and
  Restoration

abstract:
  The dynamics of Wilson lines integrated along a warped extra dimension has
been unknown. We study a five dimensional SU(N) pure gauge theory with
Randall-Sundrum warped compactification on S^1/Z_2. We clarify the notion of
large gauge transformations that are non-periodic on the covering space for
this setup. We obtain Kaluza-Klein expansions of gauge and ghost fields for the
most general twists and background gauge field configurations, which break the
gauge symmetry at classical level in general. We calculate the one-loop
effective potential and find that the symmetry corresponding to the subgroup
allowing continuous Wilson lines is dynamically restored. The presented method
can be directly applied to include extra fields. The connection to dynamical
Scherk-Schwarz supersymmetry breaking in warped space is discussed.


title:
Is the Difference Between the Pion Form Factor Measured in e+e-
  Annihilations and tau- Decays Due to an H- Propagator?

abstract:
  We discuss how a charged Higgs propagator would modify the form factor in
tau- -> pi- pi0 nu_tau decays.


title: Measuring the MSSM Lagrangean

abstract:
  At the LHC, it will be possible to investigate scenarios for physics beyond
the Standard Model in detail. We present precise total and differential cross
section predictions, based on Prospino2.0 and SMadGraph. We also show to what
degree the structure of the weak--scale supersymmetric Lagrangean can be
studied, based on LHC data alone or based on combined LHC and linear collider.
Using Sfitter we correctly take into account experimental and theoretical
errors. We make the case that a proper treatment of the error propagation is
crucial for any analysis of this kind.


title: Strangelets in cosmic rays

abstract:
  Recently new data from the Cosmo-LEP project appeared, this time from DELPHI
detector. They essentially confirm the findings reported some time ago by
ALEPH, namely the appearence of bundles of muons with unexpectedly high
multiplicities, which so far cannot be accounted by present day models. We
argue, using arguments presented by us some time ago, that this phenomenon
could be regarded as one more candidate for the presence in the flux of cosmic
rays entering the Earth's atmosphere from outer space nuggets od Strange Quark
Matter (SQM) in form of so called strangelets.


title: Are there strangelets in cosmic rays?

abstract:
  Assuming that cosmic rays entering the Earth's atmosphere contain a small
admixture of nuggets of strange quark matter in form of strangelets one can
explain a number of apparently "strange" effects observed in different cosmic
rays experiments. We shall demonstrate here that the mass spectrum of such
strangelets filles the "nuclear desert" gap existing between the heaviest
elements observed in Universe and the next "nuclear-like objects" represented
by neutron and strange stars.


title: Pentaquarks in a Breathing Mode Approach to Chiral Solitons

abstract:
  In this talk I report on a computation of the spectra of exotic pentaquarks
and radial excitations of the low--lying ${1/2}^+$ and ${3/2}^+$ baryons in a
chiral soliton model. In addition I present model results for the transition
magnetic moments between the N(1710) and the nucleon.


title: Towards possible origin of binding in non-abelian gauge theories

abstract:
  Estimate of average energy of the non-abelian dipole in the instanton medium
is calculated. This energy for the dipole in colour singlet state escalates
linearly with the separation increasing for the point-like sources unscreened.
And its 'tension' coefficient develops the magnitude pretty similar to one as
inferred from the lattice QCD and other model approaches.


title:
Sneutrino cascade decays ~nu_e -> e- ~X_1^+ -> e- f f' ~X_1^0 as a probe
  of chargino spin properties and CP violation

abstract:
  The decays ~nu_e -> e- ~X_1^+, ~nu_e* -> e+ ~X_1^-, when kinematically
allowed, constitute a source of 100% polarised charginos. We study the process
e+ e- -> ~nu_e* ~nu_e -> e+ ~X_1^- e- ~X_1^+, with subsequent chargino decays
\~X_1^- -> nu_mu mu- ~X_1^0, X_1^+ -> q qbar' ~X_1^0 or their charge conjugate
\~X_1^- -> qbar q' ~X_1^0, ~X_1^+ -> nu_mu mu+ ~X_1^0. The kinematics of this
process allows the reconstruction of the sneutrino and chargino rest frames,
and thus a clean analysis of the angular distributions of the visible final
state products in these reference systems. Furthermore, a triple product CP
asymmetry can be built in ~X_1^+- hadronic decays, involving the chargino spins
and the momenta of the quark and antiquark. With a good c tagging efficiency,
this CP asymmetry is quite sensitive to the phase of the bino mass term M_1 and
can test CP violation in the neutralino sector.


title: Estimation of eikonal parameter $c$ from the elastic scattering data

abstract:
  In this paper we applicate eikonalization procedure to the processes of
elastic scattering at high energies. We have shown, that elastic data is
consistent with relatively low values of eikonal parameter $c_p < 1$ only. It
is in contrast with theoretical considerations.


title: The Black Body Limit in Deep Inelastic Scattering

abstract:
  We use information from DIS and the two gluon nucleon form factor to estimate
the impact parameter amplitude of hadronic configurations in the dipole model
of DIS. We demonstrate that only a small fraction of the total $\gamma^{\ast}N$
cross section at $x\sim 10^{-4}$ is due to scattering that occurs near the
black body limit. We also make comparisons with other models and we point out
that a quark mass of $\lesssim 100$ MeV leads to a strong variation of the the
$t$-dependence with $Q^{2}$.


title: J/psi D*D* vertex from QCD sum rules

abstract:
  We calculated the strong form factor and coupling constant for the $J/\psi
D^* D^*$ vertex in a QCD sum rule calculation. We performed a double Borel sum
rule for the three point correlation function of vertex considering both
$J/\psi$ and $D^*$ mesons off--shell. The form factors obtained are very
different, but they give the same coupling constant.


title: The QCD analytic running coupling and chiral symmetry breaking

abstract:
  We study the dependence on the pion mass of the QCD effective charge by
employing the dispersion relations for the Adler D function. This new massive
analytic running coupling is compared to the effective coupling saturated by
the dynamically generated gluon mass. A qualitative picture of the possible
impact of the former coupling on the chiral symmetry breaking is presented.


title:
Testing the dynamics of high energy scattering using vector meson
  production

abstract:
  I review work on diffractive vector meson production in photon-proton
collisions at high energy and large momentum transfer, accompanied by proton
dissociation and a large rapidity gap. This process provides a test of the high
energy scattering dynamics, but is also sensitive to the details of the
treatment of the vector meson vertex.
  The emphasis is on the description of the process by a solution of the
non-forward BFKL equation, i.e. the equation describing the evolution of
scattering amplitudes in the high-energy limit of QCD. The formation of the
vector meson and the non-perturbative modeling needed is also briefly
discussed.


title: The Uniqueness of the $\Theta^+$ Pentaquark

abstract:
  The existence of the $\Theta^+$ pentaquark requires a peculiar mechanism to
explain its stability. Looking at quark clusters, notably diquark and triquark
configurations, such a mechanism may be found in the color-magnetic interaction
between quarks. It is possible to understand why the $\Theta^+$ is unique.
Chiral dynamics, in particular the ease of pion emission, will render other
members of the same flavor antidecuplet, such as the $\Xi^{--}$ very unstable.


title: Gauged $B-L$ symmetry and baryogenesis via leptogenesis at TeV scale

abstract:
  It is shown that the requirement of preservation of baryon asymmetry does not
rule out a scale for leptogenesis as low as 10 TeV. The conclusions are
compatible with see-saw mechanism if for example the pivot mass scale for
neutrinos is $\approx 10^{-2}$ that of the charged leptons. We explore the
parameter space $\tilde{m}_1$-$M_1$ of relevant light and heavy neutrino masses
by solving Boltzmann equations. A viable scenario for obtaining baryogenesis in
this way is presented in the context of gauged $B-L$ symmetry.


title: Glueball Spectrum and Regge Trajectory from Supergravity

abstract:
  Brief review of the status of the glueball spectrum in the deformed conifold
background. Talk based on work done with R. Hernandez and X. Amador.


title: Tests for the Statistics of Pair-Produced New Particles

abstract:
  Due to selection rules, new particles are sometimes discovered/predicted to
be produced in pairs. In the current search for SUSY particles this will occur
if R-parity is conserved. In local relativistic field theory, there can be
identical particles which are neither bosons nor fermions which are associated
with higher-dimensional representations of the permutation group. Such
particles will generally be pair-produced and so empirical tests are required
to exclude them. A parameter-free statistical model is used to study the
unusual multiplicity signatures in coherent paraboson production versus the
case of ordinary bosons.


title: High Pt hadron-hadron correlations

abstract:
  We propose the formulation of a dihadron fragmentation function in terms of
parton matrix elements. Under the collinear factorization approximation and
facilitated by the cut-vertex technique, the two hadron inclusive cross section
at leading order (LO) in e+ e- annihilation is shown to factorize into a short
distance parton cross section and the long distance dihadron fragmentation
function. We also derive the DGLAP evolution equation of this function at
leading log. The evolution equation for the non-singlet and singlet quark
fragmentation function and the gluon fragmentation function are solved
numerically with the initial condition taken from event generators.
Modifications to the dihadron fragmentation function from higher twist
corrections in DIS off nuclei are computed. Results are presented for cases of
physical interest.


title:
On the photon energy moments and their `bias' corrections in B ->
  X_s+\gamma

abstract:
  Photon energy moments in B -> X_s+\gamma and the impact of experimental cuts
are analyzed, including the biases exponential in the effective hardness missed
in the conventional OPE. We incorporate the perturbative corrections fully
implementing the Wilsonian momentum separation ab initio. This renders
perturbative effects numerically suppressed while leaving heavy quark
parameters and the corresponding light-cone distribution function well defined
and preserving their physical properties. The moments of the distribution
function are given by the heavy quark expectation values of which many have
been extracted from the B -> X_c l\nu decays. The quantitative estimates for
the biases in the heavy quark parameters determined from the photon moments
show they cannot be neglected for E_cut \gsim 1.85GeV, and grow out of theory
control for E_cut above 2.1GeV. Implications for the moments in the B -> X_c
l\nu decays at high cuts are briefly addressed.


title: The Hadronic Contribution to the Muon g-2

abstract:
  The evaluation of the hadronic contribution to the muon magnetic anomaly a_mu
is reviewed, including a new estimate using precise results on the pi+pi-
spectral function from the KLOE Collaboration. It is found that the KLOE data
confirm to some extent the previous e+e- annihilation data in this channel, and
accentuate the disagreement with the isospin-breaking-corrected spectral
function from tau- -> pi-pi0 nu decays. Correcting for the empirical difference
in the mass of the charged and the neutral rho locally improves, but does not
resolve this discrepancy. A preliminary reevaluation (including the KLOE data)
of the e+e- -based Standard Model prediction of a_mu results in a deviation of
2.7 standard deviations from the BNL measurement.


title: Discrete regularisation of localised kinetic terms

abstract:
  We investigate the behaviour of 5d models with general brane kinetic terms by
discretising the extra dimension. We show that in the continuum limit the
Kaluza-Klein masses and wave functions are in general nonanalytic in the
coefficients of brane terms.


title:
Diffractive photoproduction of opposite-charge pseudoscalar meson pairs
  at high energies

abstract:
  We calculate the cross section for diffractive photoproduction of
opposite-charge pseudoscalar meson pairs $M^+M^- = \pi^+ \pi^-$, $K^+ K^-$,
$D^+ D^-$ and $B^+ B^-$ in a broad range of center-of-mass energies relevant
for GlueX/Hall D, FOCUS, COMPASS and HERA experiments. In the case of
$\pi^+\pi^-$ production we find that the interference of the $\rho^0$ resonance
and the two-pion continuum leads to a considerable deformation of the shape of
$\rho^0$ in agreement with the data from the ZEUS collaboration. We also
discuss the spectral shape of the $\rho^0$ as a function of the momentum
transfer and the contribution of higher partial waves to the $\pi^+\pi^-$ mass
spectrum. We predict a sizeable energy-dependent forward-backward asymmetry in
the Gottfried-Jackson frame. For the heavy meson production we find that the
cross section for diffractive production increases much slower than the one for
open charm or bottom production. We discuss lower and upper limits for the
cross sections for diffractive production of $D^+ D^-$ and $B^+ B^-$ pairs,
which we find can be as large as 10% of the open flavor production.


title:
Transverse beam polarization and CP violation in e+ e- -> gamma Z with
  contact interactions

abstract:
  We consider the most general gauge-invariant, chirality-conserving contact
interactions in the process e +e- -> gamma Z, of the type proposed Abraham and
Lampe, in order to explore the possibility of CP violation at future linear
colliders in the presence of polarized beams. We hereby extend recent work on
CP violation due to anomalous triple-gauge boson vertices. We isolate
combinations of couplings which are genuinely CP violating, pointing out which
of these can only be studied with the use of transverse polarization. We place
constraints on these couplings that could arise from suitably defined CP-odd
asymmetries, considering realistic polarization (either longitudinal or
transverse) of 80% and 60% for the electron and positron beams respectively,
and with an integrated luminosity \int dt L of 500 fb^{-1} at a centre of mass
energy of \sqrt{s}=500 GeV.


title: Perturbative Unification and Higgs Boson Mass Bounds

abstract:
  Supersymmetric extensions of the Standard Model generally give a theoretical
upper limit on the lightest Higgs boson mass which may be uncomfortably close
to the current experimental lower bound of $m_h$ > 114 GeV. Here we show ways
in which this upper limit on $m_h$ can be relaxed substantially in the
perturbative regime, while maintaining the successful unification of gauge
couplings as observed in the minimal scenario. A class of models is presented,
which includes new vector-like matter with the quantum numbers of the 5, 5-bar
and singlet representations of SU(5) and having Yukawa couplings (\kappa) to
the usual Higgs doublet $H_u$. This new matter transforms non-trivially under a
"lateral" SU(N) gauge symmetry, which enables the new Yukawa couplings \kappa
to be sizable, even larger than the top-quark Yukawa coupling, and still be
perturbative at all momenta up to the unification scale of 10^{16} GeV. We find
that, consistent with low energy constraints, $m_h$ can be raised to values as
large as 200 - 300 GeV.


title: SU(3) constraints on cryptoexotic pentaquarks

abstract:
  We examine SU(3) constraints on the spectrum and decay widths of cryptoexotic
nucleon-like states in antidecuplet of pentaquarks. We show that in the ideal
mixing scenario the number of free matrix elements describing splittings
reduces from 4 to 2. Model-independent sum rules are derived.
  Using as input $\Theta^+$ and $\Xi_{3/2}$ masses we show that it is difficult
to interpret Roper and $N^{\ast}(1710)$ nucleon resonances as cryptoexotic
pentaquarks. Large $N_c$ limit for antidecuplet and accompanying octet in the
diqaurk picture and the analogy with the soliton model is also discussed.


title: Gauge-invariance in hadronic scattering processes

abstract:
  High energy hadronic scattering processes can be described in terms of
partonic scattering processes and parton distribution and fragmentation
functions. These are bilocal matrix elements of quark operators. Colour
gauge-invariance requires inclusion of a gauge link, which is characterized by
its path. For transverse momentum dependent distribution and fragmentation
functions, appearing in single spin asymmetries, different paths appear
depending on the process. The difference is related to a time-reversal odd
gluonic pole matrix element. We discuss briefly the path structure of the gauge
link in more complicated processes.


title: Photon tagged correlations in heavy ion collisions

abstract:
  A detailed study of various two-particle correlation functions involving
photons and neutral pions is presented in proton-proton and lead-lead
collisions at the LHC energy. The aim is to use these correlation functions to
quantify the effect of the medium (in lead-lead collisions) on the jet decay
properties. The calculations are carried out at the leading order in QCD but
the next-to-leading order corrections are also discussed. The competition
between different production mechanisms makes the connection between the jet
energy loss spectrum and the gamma-pi correlations somewhat indirect while the
gamma-gamma correlations have a clearer relation to the jet fragmentation
properties.


title:
Electroweak supersymmetric effects on high energy unpolarized and
  polarized single top production at LHC

abstract:
  We consider various processes of single top production at LHC in the
theoretical framework of the MSSM and examine the role of the supersymmetric
electroweak one-loop corrections in a special moderately light SUSY scenario,
in an initial parton-pair c.m. high energy range where a logarithmic asymptotic
expansion of Sudakov type can be used. We show that the electroweak virtual
effects are systematically large, definitely beyond the relative ten percent
size, particularly for a final $tH^-$ pair where a special enhancement is
present. We show then in a qualitative way the kind of precision tests of the
model that would be obtainable from accurate measurements of the energy
distributions of the various cross sections and of the top polarization
asymmetries.


title: The History of Neutrino Oscillations

abstract:
  The early history of neutrino masses, mixing and oscillations is briefly
reviewed.


title:
Requirements on collider data to match the precision of WMAP on
  supersymmetric dark matter

abstract:
  If future colliders discover supersymmetric particles and probe their
properties, one could predict the dark matter density of the Universe and would
constrain cosmology with the help of precision data provided by WMAP and
PLANCK.
  We investigate how well the relic density can be predicted in minimal
supergravity (mSUGRA), with and without the assumption of mSUGRA when analysing
data. We determine the parameters to which the relic density is most sensitive,
and quantify the collider accuracy needed. Theoretical errors in the prediction
are investigated in some detail.


title:
Two-loop QCD corrections to the vector form factors for the heavy-quark
  photo-production

abstract:
  We review on the calculation of the heavy-quark photo-production vector form
factors, with the full dependence on the mass of the heavy-quark. The Feynman
diagrams are evaluated within the dimensional regularization scheme and
expressed in Laurent series of $\epsilon=(4-D)/2$, where $D$ is the space-time
dimension. The coefficients of the expansion are expressed in terms of harmonic
polylogarithms. The numerical evaluation of the analytical formulas and the
threshold limit of our results are presented.


title:
Hadronization in Polarized Semi-Inclusive DIS: the Question of
  Independent Fragmentation

abstract:
  The new formalism for description of (un)polarized semi-inclusive DIS at
moderate energies is developed. Hadron production is modeled as a product of
distribution functions and hadronization functions (HFs) weighted by the hard
scattering cross sections, as it is done in the {\tt LEPTO} event generator.
The correct treatment of polarization effects shows that description of
semi-inclusive DIS within this formalism includes a new nonperturbative input
-- {\it polarized} HFs. It is shown that this approach does not correspond to
the commonly adopted one with the independent quark fragmentation. The purity
method used by the HERMES collaboration mixes up the two approaches and ignores
the contributions from polarized HFs. This method cannot be considered a
precise tool for the extraction of polarized quark distributions from measured
SIDIS asymmetries.


title: Probing Quantum Decoherence with High-Energy Neutrinos

abstract:
  We consider the prospects for observing the effects of quantum decoherence in
high-energy (TeV-PeV) neutrinos from astrophysical sources. In particular, we
study Galactic sources of electron anti-neutrinos produced in the decay of
ultra-high energy neutrons. We find that next generation neutrino telescopes
should be capable of placing limits on quantum decoherence effects over
multi-kiloparsec baselines, surpassing current bounds by a factor of $10^{12}$
to $10^{33}$, depending on the model considered.


title:
Running G and \Lambda at low energies from physics at M_X: possible
  cosmological and astrophysical implications

abstract:
  The renormalization group (RG) approach to cosmology is an efficient method
to study the possible evolution of the cosmological parameters from the point
of view of quantum field theory in curved space-time. In this work we continue
our previous investigations of the RG method based on potential low-energy
effects induced from physics at very high energy scales M_X near M_P. In the
present instance we assume that both the Newton constant, G, and the
cosmological term, \Lambda, can be functions of a scale parameter \mu. It turns
out that G(\mu) evolves according to a logarithmic law which may lead to
asymptotic freedom of gravity, similar to the gauge coupling in QCD. At the
same time \Lambda(\mu) evolves quadratically with \mu. We study the consistency
and cosmological consequences of these laws when \mu=H. Furthermore, we propose
to extend this method to the astrophysical domain after identifying the local
RG scale at the galactic level. It turns out that Kepler's third law of
celestial mechanics receives quantum corrections that may help to explain the
flat rotation curves of the galaxies without introducing the dark matter
hypothesis. The origin of these effects (cosmological and astrophysical) could
be linked, in our framework, to physics at M_X= 10^{16-17} GeV.


title: Right handed currents and FSI phases in B^0 --> \phi K^{*0}

abstract:
  We consider possible effects of New Physics (NP) on the angular distributions
of the decay B^0 --> \phi K^{*0}, showing how these effects depend on the
nature of nonstandard interactions. In a general framework based on
factorization, we show that triple products can be used to probe the chirality
of NP currents. In this analysis we take into account the presence of
non-vanishing strong phases, which is motivated by recent experimental
evidence. It is seen that the observability of right-handed NP is strongly
dependent on the relation between the relative magnitude of these phases and
the ratio of Standard Model and NP scales. As an application we estimate the
expected values of relevant observables in a particular Left Right Symmetric
Model.


title:
Exotic pentaquarks, crypto-heptaquarks and linear three-hadronic
  molecules

abstract:
  In this talk, multiquarks are studied microscopically in a standard quark
model. In pure ground-state pentaquarks the short-range interaction is computed
and it is shown to be repulsive, a narrow pentaquark cannot be in the
groundstate. As a possible excitation, an additional quark-antiquark pair is
then considered, and this is suggested to produce linear molecular system, with
a narrow decay width. This excitation may be energetically favourable to the
p-wave excitation suggested by the other pentaquark models. Here, the quarks
assemble in three hadronic clusters, and the central hadron provides stability.
The possible crypto-heptaquark hadrons with exotic pentaquark flavours are
studied.


title: Hadron decay amplitudes from $B\to K \pi$ and $B\to \pi \pi$ decays

abstract:
  One can analyze the hadronic decay amplitudes for $B\to PP$ decays using
flavor SU(3) symmetry in different ways, such as the algebraic and quark
diagram approaches. We derive specific relations between these two sets of
amplitudes. In the Standard Model the leading hadronic decay amplitudes depend
on only five independent parameters which can be determined using recent
experimental data on the branching ratios and CP violating asymmetries of $B\to
K \pi$ and $B \to \pi\pi$. We find, however, that the leading amplitudes
provide a best fit solution with a large $\chi^2$, which cannot therefore be
regarded as a good fit. Keeping sub-leading terms, makes it possible to have a
reasonable minimal $\chi^2$. We also find that in general the color suppressed
decay amplitude is comparable with the color allowed amplitude, contrary to
expectations.


title:
Effects of polarization in electromagnetic processes in oriented
  crystals at high energy

abstract:
  Under quite generic assumptions the general expression is derived for the
probability of circularly polarized photon emission from the longitudinally
polarized electron and for the probability of pair creation of longitudinally
polarized electron (positron) by circularly polarized photon in oriented
crystal in a frame of the quasiclassical operator method. For small angle of
incidence the expression turns into constant field limit with corrections due
to inhomogeneous character of field in crystal. For relatively large angle of
incidence the expression gets over into the theory of coherent radiation or
pair creation. It is shown that the crystal is a very effective device for
helicity transfer from an electron to photon and back from a photon to electron
or positron.


title: Reactor as a Source of Antineutrinos: Thermal Fission Energy

abstract:
  Deeper insight into the features of a reactor as a source of antineutrinos is
required for making further advances in studying the fundamental properties of
the neutrino. The relationship between the thermal power of a reactor and the
rate of the chain fission reaction in its core is analyzed.


title: Neutrino 2004: Concluding Talk

abstract:
  We review the highlights of Neutrino 2004 and recall the main lessons from
neutrinos in recent years that had a great impact on particle physics and
cosmology.


title:
Note on Unitarity Constraints in a Model for a Singlet Scalar Dark
  Matter Candidate

abstract:
  We investigate perturbative unitarity constraints in a model for a singlet
scalar dark matter candidate. Considering elastic two particle scattering
processes of the Higgs particle and the dark matter candidate, a real
Klein-Gordon scalar field, perturbative unitarity constrains the self-couplings
of the scalar fields.


title: Physics of Massive Neutrinos

abstract:
  I summarize the present status of global analyses of neutrino oscillations,
including the most recent KamLAND and K2K data, as well as the latest solar and
atmospheric neutrino fluxes. I give the allowed ranges of the three--flavour
oscillation parameters from the current worlds' global neutrino data sample,
their best fit values and discuss the small parameters DeltaM_solar/DeltaM_atm
and sin^2 theta_13, which characterize the strength of CP violation in neutrino
oscillations. I briefly discuss neutrinoless double beta decay and the LSND
neutrino oscillation hint, as well as the robustness of the neutrino
oscillation results in the presence of non-standard physics.


title: Split Supersymmetry in an Orbifold GUT

abstract:
  We propose a supersymmetric SU(5) orbifold GUT in 5 dimensions in which
supersymmetry breaking at the boundaries give rise to split supersymmetry
spectrum. The extra dimension is compactified on a $S^1/Z_2 \times Z_2^\prime$
orbifold having two fixed points. The standard model fermions are localized in
the standard model brane, where supersymmetry is broken by the nonvanishing of
the F-term of a superfield X at some intermediate scale. All scalar
superpartners acquires mass at this stage. The standard model gauginos and
higgsinos remain light, since their masses are protected by R-symmetry and
induced only by loop contributions and contact interaction in our brane. Usual
features of orbifold GUTs are preserved in this scenario and proton decay and
neutrino mass problems are solved.


title:
Evidence for Factorization Breaking in Diffractive Low-Q^2 Dijet
  Production

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. In contrast to recent experimental claims, evidence
for factorization breaking is found only for resolved, and not direct, photon
contributions. No evidence is found for large normalization uncertainties in
diffractive parton densities. The results confirm theoretical expectations for
the (non-)cancellation of soft singularities in diffractive scattering as well
as previous results for (almost) real photoproduction.


title: Summary of Working Group B: Diffraction and Vector Mesons

abstract:
  We summarise the contributions presented in working group B: "Diffraction and
Vector Mesons" at the 12th Intl. Workshop on Deep Inelastic Scattering (DIS
2004) held in Strbske Pleso, Slovakia.


title: Flavor and electroweak symmetry breaking at the TeV scale

abstract:
  We present a unified picture of flavor and electroweak symmetry breaking at
the TeV scale. Flavor and Higgs bosons arise as pseudo-Goldstone modes in a
nonlinear sigma model. Explicit collective symmetry breaking yields stable
vacuum expectation values and masses protected at one loop by the little-Higgs
mechanism. The coupling to the fermions through a Yukawa lagrangian with a U(1)
global flavor symmetry generates well-definite mass textures that correctly
reproduce the mass hierarchies and mixings of quarks and leptons. The model is
more constrained than usual little- Higgs models because of bounds on weak and
flavor physics. The main experimental signatures testable at the LHC are a
rather large mass mh0 = 317+/-80 GeV for the (lightest) Higgs boson and a
characteristic spectrum of new bosons and fermions with masses around the TeV
scale.


title: Hard Exclusive QCD Processes at the Linear Collider

abstract:
  The next generation of $e^+e^-$ colliders will offer a possibility of clean
testing of QCD dynamics. Recent progress in the theoretical description of
exclusive processes permits for many of them a consistent use of the
perturbative QCD methods.
  We find that already on the basis of Born approximation, the exclusive
diffractive production of two $\rho$ mesons from virtual photons at very high
energies should be measurable at the linear collider (LC).


title: High energy neutrino cross sections

abstract:
  The theoretical status of the neutrino-nucleon cross section is reviewed for
incident neutrino energies up to E_nu=10^12 GeV, including different approaches
to high energy extrapolations. Nonstandard model physics may play a role at
ultrahigh energies. The cases of mini-black hole production and electroweak
instanton contributions are discussed as examples in the context of ultrahigh
energy neutrino scattering.


title: Top Quark Physics at Colliders

abstract:
  We review some recent developments in top quark production and decay at
current and future colliders.


title: Effective Lagrangian of the $/R$MSSM for neutrino mass generation

abstract:
  We derive the lepton number violating dimension-five and dimension-seven
operators, relevant for neutrino mass generation, in the Minimal Supersymmetry
Standard Model without R-parity (the $/R$MSSM) by using the effective
Lagrangian method. We keep all the possible CP violating phases, and we
establish the general relationship between the high-scale parameters and the
low-energy observals associated with the Standard Model particles. We study in
a specific model the dependence of neutrino masses on the CP phases.


title:
Investigation of the Discovery Potential for Higgs Bosons of the Minimal
  Supersymmetric Extension of the Standard Model (MSSM) with ATLAS

abstract:
  The discovery potential of the ATLAS experiment at the LHC for Higgs bosons
of the MSSM is discussed. Several CP conserving and one CP violating benchmark
scenario are investigated.


title: Supersymmetric Dark Matter 2004

abstract:
  Recent cosmological data allow to determine the universal Dark Matter (DM)
density to a precision of about 10%, if a simple, well-motivated ansatz for the
spectrum of primordial density perturbations is correct. Not surprisingly, a
thermal neutralino \chi will have the correct relic density only in ``small''
regions of parameter space. In particular, for fixed values of the other
parameters, the allowed region in the (m_0, m_{1/2} plane (in mSUGRA or similar
models) seems quite small, if standard assumptions about the Universe at
temperature T \simeq m_\chi / 10 are correct. I argue that the allowed
parameter space is actually still quite large, when all uncertainties are
properly taken into account. In particular, the current lower limits on
sparticle and Higgs masses that can be derived within mSUGRA do not change
appreciably when the DM relic density constraint is imposed. I also show that
deviating from mSUGRA does not alleviate the finetuning required to obtain the
correct relic density, unless one also postulates a non-standard cosmology.
Finally, I briefly discuss claimed positive evidence for particle Dark Matter.


title: Asymmetric Sneutrino Dark Matter and the Omega(b)/Omega(DM) Puzzle

abstract:
  The inferred values of the cosmological baryon and dark matter densities are
strikingly similar, but in most theories of the early universe there is no true
explanation of this fact; in particular, the baryon asymmetry and thus density
depends upon unknown, and {\it a priori} unknown and possibly small,
CP-violating phases which are independent of all parameters determining the
dark matter density. We consider models of dark matter possessing a
particle-antiparticle asymmetry where this asymmetry determines both the baryon
asymmetry and strongly effects the dark matter density, thus naturally linking
$\Omega_{\rm{b}}$ and $\Omega_{\rm{dm}}$. We show that sneutrinos can play the
role of such dark matter in a previously studied variant of the MSSM in which
the light neutrino masses result from higher-dimensional supersymmetry-breaking
terms.


title: Heavy Ions -- Prospects at the LHC

abstract:
  This is a review of the physics prospects for relativistic heavy ion
collisions in the CERN Large Hadron Collider. The motivation for the study of
superdense matter created in relativistic heavy ion collision is the prospect
of observing a novel state of strongly interacting matter, the quark-gluon
plasma. Experiments at the CERN Super Proton Synchrotron (SPS) and the
Relativistic Heavy Ion Collider (RHIC) at Brookhaven have yielded important
clues of the characteristic signatures of this new state. The LHC will extend
the range of energy densities that can be explored and facilitate the
observation of plentiful hard probes (jets, heavy quarks) of the properties of
the dense matter.


title: Collinear and soft resummation in the large-x limit

abstract:
  I discuss general unified formulas for resumming collinear and soft
contributions to QCD hard scattering cross sections at large x. Expansions of
the resummed cross sections to next-to-next-to-next-to-leading order are also
shown along with applications of the formalism.


title:
Radiative Corrections to the Inflaton Potential as an Explanation of
  Suppressed Large Scale Power in Density Perturbations and the Cosmic
  Microwave Background

abstract:
  The Wilkinson Microwave Anisotropy Probe microwave background data suggest
that the primordial spectrum of scalar curvature fluctuations is suppressed at
small wavenumbers. We propose a UV/IR mixing effect in small-field inflationary
models that can explain the observable deviation in WMAP data from the
concordance model. Specifically, in inflationary models where the inflaton
couples to an asymptotically free gauge theory, the radiative corrections to
the effective inflaton potential can be anomalously large. This occurs for
small values of the inflaton field which are of the order of the gauge theory
strong coupling scale. Radiative corrections cause the inflaton potential to
blow up at small values of the inflaton field. As a result, these corrections
can violate the slow-roll condition at the initial stage of the inflation and
suppress the production of scalar density perturbations.


title: Motivation for polarised $e^-$ and $e^+$ Beams

abstract:
  A future Linear Collider is well suited for discovering physics beyond the
Standard Model, for revealing the structure of the underlying physics as well
as for performing high precision tests of the Standard Model. The use of
polarised beams will be one of the powerful tools for reaching these goals.
This paper highlights some recent studies of having both beams simultaneously
polarised which allows to use longitudinally as well as transversely polarised
beams.


title: SuperWIMP Dark Matter in Supergravity with a Gravitino

abstract:
  We investigate the superWIMP scenario in the framework of supersymmetry, in
which the lightest supersymmetric particle is a stable gravitino. We consider
slepton, sneutrino or neutralino being the next-lightest supersymmetric
particle, and determine what superpartner masses are viable, applying
cosmic-microwave background and electromagnetic and hadronic Big-Bang
Nucleosythesis constraints.


title: Photon deflection by a Coulomb field in noncommutative QED

abstract:
  In noncommutative QED photons present self-interactions in the form of triple
and quartic interactions. The triple interaction implies that, even though the
photon is electrically neutral, it will deflect when in the presence of an
electromagnetic field. If detected, such deflection would be an undoubted
signal of noncommutative space-time. In this work we derive the general
expression for the deflection of a photon by any electromagnetic field. As an
application we consider the case of the deflection of a photon by an external
static Coulomb field.


title: Susy searches in combined LHC/LC analyses

abstract:
  We present a case study for the synergy of combined LHC and LC analyses in
Susy searches in which simultaneous running of both machines is very important.
In this study only light non-coloured Susy particles are accessible at a Linear
Collider with an initial energy of $\sqrt{s}=500$ GeV. Nevertheless the precise
analysis at the LC leads to an accurate Susy parameter determination and
prediction of heavy Susy particles. Providing these LC results as input for the
LHC analyses could be crucial for the identification of signals resulting in a
direct measurement of the heavy neutralinos. The interplay of the LHC and LC
will thus provide an important consistency test of the underlying model.


title: The Minimal Length and Large Extra Dimensions

abstract:
  Planck scale physics represents a future challenge, located between particle
physics and general relativity. The Planck scale marks a threshold beyond which
the old description of spacetime breaks down and conceptually new phenomena
must appear. Little is known about the fundamental theory valid at Planckian
energies, except that it necessarily seems to imply the occurrence of a minimal
length scale, providing a natural ultraviolet cutoff and a limit to the
possible resolution of spacetime.
  Motivated by String Theory, the models of large extra dimensions lower the
Planck scale to values soon accessible. These models predict a vast number of
quantum gravity effects at the lowered Planck scale, among them the production
of TeV-mass black holes and gravitons. Within the extra dimensional scenario,
also the minimal length comes into the reach of experiment and sets a
fundamental limit to short distance physics.
  We review the status of Planck scale physics in these effective models.


title:
Study of Dark Matter inspired cMSSM scenarios at a TeV-class Linear
  Collider

abstract:
  The accuracy in the measurement of the masses of sleptons and heavy Higgs
bosons in cMSSM scenarios, compatible with the WMAP result on cold dark matter,
has been re-analysed in view of the requirements for predicting this density to
a few percent level from SUSY measurements at the linear collider.


title: An Effective Field Theory at Finite Density

abstract:
  An effective theory to treat the dense nuclear medium by the perturbative
expansion method is proposed as a natural extension of the Heavy Baryon Chiral
Perturbation Theory (HBChPT). Treating the Fermi momentum scale as a separate
scale of the system, we get an improved convergence and the conceptually clear
interpretation. We compute the pion decay constant and the pion velocity in the
nuclear medium, and find their characters different from what the usual HBChPT
predicts. We also obtain the Debye screening scale at the normal nuclear matter
density, and the damping scale of the pion wave. Those results indicate that
the present theory, albeit its improvement over the HBChPT, has the limitation
yet to go over to the medium of about 1.3 times of normal matter density due to
the absence of the intrinsic density dependence of the coupling constants. We
discuss how we overcome this limitation in terms of the renormalization method.


title: B-> X_d \ell^+\ell^- in a CP softly broken two Higgs doublet model

abstract:
  We study the differential branching ratio, forward-backward asymmetry,
CP-violating asymmetry, CP-violating asymmetry in the forward-backward
asymmetry and polarization asymmetries of the final lepton in the B-> X_d
\ell^+\ell^- decays in the context of a CP softly broken two Higgs doublet
model. We analyze the dependencies of these observables on the model parameters
by paying a special attention to the effects of neutral Higgs boson (NHB)
exchanges and possible CP violating effects. We find that NHB effects are quite
significant for the \tau mode. The above-mentioned observables seems to be
promising as a testing ground for new physics beyond the SM, especially for the
existence of the CP-violating phase in the theory.


title:
Impact Parameter Dependent Parton Distributions for a Relativistic
  Composite System

abstract:
  We investigate the impact parameter dependent parton distributions for a
relativistic composite system in light-front framework. We express them in
terms of overlaps of light-cone wave functions for a self consistent two-body
spin-1/2 state, namely an electron dressed with a photon in QED. The pdfs are
distorted in the transverse space for transverse polarization of the state at
one loop level.


title:
Equation of state of deconfined matter within dynamical quasiparticle
  description

abstract:
  A simple quasiparticle model, motivated by lowest-order perturbative QCD, is
proposed. It is applied to interpret the lattice QCD equation of state. A
reasonable reproduction of the lattice data is obtained. In contrast to
existing quasiparticle models, the present model is formulated in dynamical
rather than thermodynamical terms, and is easily applicable to a system with
finite baryon density. In particular, the model simulates the confinement
property.


title:
Two-loop O(alpha_s y^2) and O(y^4) MSSM corrections to the pole mass of
  the b-quark

abstract:
  The paper is devoted to the calculation of the two-loop O(alpha_s y^2) and
O(y^4) MSSM corrections to the relation between the pole mass of the b-quark
and its running mass in DR scheme. To evaluate the needed diagrams the large
mass expansion procedure is used. The obtained contributions are negative in
most of the regions of the parameter space and partly compensate the positive
O(alpha_s^2) contribution calculated earlier.


title: Multiplicity fluctuations in high energy hadronic and nuclear collisions

abstract:
  The showers of cosmic rays entering the Earth's atmosphere are main sources
of information on cosmic rays and are also believed to provide information on
elementary interactions at energies not accessible to accelerators. In this
context we would like first to remind the role of inelasticity K and elementary
cross section $\sigma$ and then argue that similar in importance are
fluctuations of different observables. The later will be illustrated by
multiplicity fluctuations in hadronic and nuclear collisions.


title: Evading the Infrared Problem of Thermal QCD

abstract:
  Due to asymptotic freedom, QCD is guaranteed to be accessible to perturbative
methods at asymptotically high temperatures. However, in 1979 Linde has pointed
out the existence of an "infrared wall", beyond which an infinite number of
Feynman diagrams contribute. Following a proposal by Braaten and Nieto, it is
shown explicitly how the limits to computability that this infrared problem
poses can be overcome in the framework of dimensionally reduced effective
theories.


title: Models of Neutrino Masses and Mixings

abstract:
  Pocket guide to Terra Incognita of the ``Planisphaerium Neutrinorum''
(http://www.ba.infn.it/~now2004/) by Eligio Lisi. Includes a survival kit for
the Ue3 territory and a first-aid package for the case of maximal atmospheric
mixing angle.


title: Coherent Baryogenesis and Nonthermal Leptogenesis: A comparison

abstract:
  We present a new mechanism for baryogenesis: at preheating after inflation
fermions acquire a varying mass by their coupling to a time dependent field.
Their CP-violating mass matrix can generate a charge asymmetry to be
transformed into a lepton asymmetry through decay into standard model particles
and heavy Majorana neutrinos. In a concrete model of hybrid inflation we
compare ``coherent baryogenesis'' with nonthermal leptogenesis by perturbative
decay of the inflation condensates.


title: Summary Report for Electroweak Symmetry Breaking Session in LCWS 2004

abstract:
  Theoretical activities on the Higgs physics and its implication to physics
beyond the standard model are summarized as the summary report for the Higgs
session in LCWS 2004.


title:
Pion distribution amplitude -- from theory to data (CELLO, CLEO, E-791,
  JLab F(pi))

abstract:
  In my talk I discuss the theoretical and experimental status of the pion
distribution amplitude (DA). I show that the QCD sum rule method with nonlocal
condensates (NLC) for the pion DA gives us admissible sets (bunches) of DAs for
each value of QCD-vacuum nonlocality parameter \lambda_q. Comparing these
bunches with the new CLEO constraints, obtained in the NLO light-cone sum-rule
analysis of \gamma^*\gamma\to\pi-transition form factor, allows us to fix the
value of QCD vacuum nonlocality \lambda_q^2\simeq0.4 GeV^2. Then I show that
the corresponding bunch of pion DAs agrees well with the E791 data on
diffractive dijet production and with the JLab F(pi) data on the pion
electromagnetic form factor. The latter comparison is made in the framework of
analytic perturbation theory with non-power NLO for the pion form factor, where
scale-setting ambiguities are strongly reduced already at the NLO level.


title:
Kinetic description of fermion flavor mixing and CP-violating sources
  for baryogenesis

abstract:
  We derive transport equations for fermionic systems with a space-time
dependent mass matrix in flavor space allowing for complex elements leading to
CP violation required for electroweak baryogenesis. By constructing appropriate
projectors in flavor space of the relevant tree level Kadanoff-Baym equations,
we split the constraint equations into "diagonal" and "transversal" parts in
flavor space, and show that they decouple. While the diagonal densities exhibit
standard dispersion relations at leading order in gradients, the transverse
densities exhibit a novel on-shell structure. Next, the kinetic equations are
considered to second order in gradients and the CP-violating source terms are
isolated. This requires a thorough discussion of a flavor independent
definition of charge-parity symmetry operation. To make a link with
baryogenesis in the supersymmetric extension of the Standard Model, we
construct the Green functions for the leading order kinetic operator and solve
the kinetic equations for two mixing fermions (charginos). We take account of
flavor blind damping, and consider the cases of inefficient and moderate
diffusion. The resulting densities are the CP-violating chargino currents that
source baryogenesis.


title: Upper Bounds on the Neutrino-Nucleon Inelastic Cross Section

abstract:
  Extraterrestrial neutrinos can initiate deeply developing air showers, and
those that traverse the atmosphere unscathed may produce cascades in the ice or
water. Up to now, no such events have been observed. This can be translated
into upper limits on the diffuse neutrino flux. On the other hand, the
observation of cosmic rays with primary energies > 10^{10} GeV suggests that
there is a guaranteed flux of cosmogenic neutrinos, arising from the decay of
charged pions (and their muon daughters) produced in proton interactions with
the cosmic microwave background. In this work, armed with these cosmogenic
neutrinos and the increased exposure of neutrino telescopes we bring up-to-date
model-independent upper bounds on the neutrino-nucleon inelastic cross section.
Uncertainties in the cosmogenic neutrino flux are discussed and taken into
account in our analysis. The prospects for improving these bounds with the
Pierre Auger Observatory are also estimated. The unprecedented statistics to be
collected by this experiment in 6 yr of operation will probe the
neutrino-nucleon inelastic cross section at the level of Standard Model
predictions.


title: Testing CP Violation and Universal Extra Dimensions at Future Colliders

abstract:
  A future linear e+e- collider with a clean environment, tunable collision
energy, high luminosity, polarized incoming beams, and additional e-e-, e-gamma
and gamma-gamma modes, will offer precision tools to explore new physics. Here
we summarize three papers submitted to the ICHEP04 conference in which
polarized e+e- and gamma-gamma beams are exploited to search for CP violation,
and universal extra dimensions (UED).


title: Deep inside the pion. Reconciling QCD theory with data

abstract:
  Recent developments in the QCD description of the pion structure are
reviewed. The CLEO pion-photon transition data analysis favors a distribution
amplitude for the pion that is double-humped but endpoint-suppressed. After a
short outline of the derivation of this amplitude from QCD sum rules with
nonlocal condensates, we present the fully fledged analysis of the CLEO data
prefaced by predictions for the $F^{\gamma\rho\pi}$ form factor and commenting
on the inherent theoretical uncertainties due to higher twists and NNLO
perturbative corrections. We supplement our discussion by considering within
QCD factorization theory, the electromagnetic pion form factor at NLO accuracy
on one hand, and diffractive di-jets production on the other, comparing our
predictions with the respective experimental data from JLab and the Fermilab
E791 collaboration. In all cases, the agreement is impressive.


title: Global QCD Analysis and Hadron Collider Physics

abstract:
  The role of global QCD analysis of parton distribution functions (PDFs) in
collider physics at the Tevatron and LHC is surveyed. Current status of PDF
analyses are reviewed, emphasizing the uncertainties and the open issues. The
stability of NLO QCD global analysis and its prediction on "standard candle"
W/Z cross sections at hadron colliders are investigated. The importance of the
precise measurement of various W/Z cross sections at the Tevatron in advancing
our knowledge of PDFs, hence in enhancing the capabilities of making
significant progress in W mass and top quark parameter measurements, as well as
the discovery potentials of Higgs and New Physics at the Tevatron and LHC, is
emphasized.


title: Alternatives to Seesaw

abstract:
  The seesaw mechanism is attractive not only because it "explains'' small
neutrino mass, but also because of its packaging with the SUSY-GUT,
leptogenesis, Dark Matter, and electroweak symmetry breaking. However, this
package has the flavor, CP, and gravitino problems. I discuss two alternatives
to the seesaw mechanism. In one of them, the anomaly-mediated supersymmetry
breaking solves these problems, while predicts naturally light Dirac neutrinos.
In the other, the light Majorana neutrinos arise from supersymmetry breaking
with right-handed neutrinos below TeV, and the Dark Matter and collider
phenomenology are significantly different.


title: Can one see the number of colors in eta, eta-prime --> pi^+ pi^- gamma?

abstract:
  We investigate the decays eta, eta-prime --> pi^+ pi^- gamma up to
next-to-leading order in the framework of the combined 1/N_c and chiral
expansions. Counter terms of unnatural parity at next-to-leading order with
unknown couplings are important to acommodate the results both to the
experimental decay width and the photon spectrum. The presence of these
coefficients does not allow for a determination of the number of colors from
these decays.


title: Renormalizable extra-dimensional models

abstract:
  Non-Abelian gauge theories may have continuum limits in more than four
dimensions, supported by non-trivial ultra-violet fixed points. Moreover, such
theories can be expected to be accessible to Wilson's epsilon expansion. We
investigate this series for SU(N) Yang-Mills, in particular for the fixed point
coupling and critical exponent nu, up to four loops. From the model-building
point of view, such theories would be effectively perturbatively renormalizable
in the normal way. A particularly attractive possibility is the construction of
renormalizable extra-dimensional models of the weak interactions, which have
the potential to address the full hierarchy problem. The simplest such
gauge-Higgs unification model is however ruled out by a combination of
theoretical and phenomenological constraints.

categories: hep-ph cond-mat.stat-mech hep-lat hep-th


title: Synchrotron radiation in Myers-Pospelov effective electrodynamics

abstract:
  In the framework of the classical effective Lorentz invariance violating
(LIV) model of Myers-Pospelov, we present a complete calculation of the
synchrotron radiation produced by a circularly moving charge in the rest frame
of the model. Within the full far-field approximation we compute exact
expressions for the electric and magnetic fields, the angular distribution of
the power spectrum and the total emitted power in the m-th harmonic. We also
perform an expansion of the latter quantity in terms of the electromagnetic LIV
parameter and calculate the average degree of circular polarization to first
order in such a parameter. In both cases we find, under adequate circumstances,
the appearance of rather unexpected and large amplifying factors, which go
together with the otherwise negligible naive expansion parameter. This opens up
the possibility of selecting astrophysical sources where these amplifying
factors are important, to explore further constraints imposed upon the LIV
parameters by synchrotron radiation measurements.


title: b \to ss\bar{d}$ in a Vector Quark Model

abstract:
  The rare decay $b\to ss\bar{d}$ is studied in a vector quark model by adding
the contributions from exotic vector-like quarks. We find that the contribution
from box diagrams amounts to $10^{-9}$ in the branching ratio, while the
$Z$-mediated tree level contribution is negligible.


title:
Effective Theory Approach to the Skyrme model and Application to
  Pentaquarks

abstract:
  The Skyrme model is reconsidered from an effective theory point of view. From
the most general chiral Lagrangian up to including terms of order $p^4$, $N_c$
and $\delta m^2$ ($\delta m\equiv m_s-m$), new interactions, which have never
been considered before, appear upon collective coordinate quantization. We
obtain the parameter set best fitted to the observed low-lying baryon masses,
by performing the second order perturbative calculations with respect to
$\delta m$. We calculate the masses and the decay widths of the other members
of (mainly) anti-decuplet pentaquark states. The formula for the decay widths
is reconsidered and its baryon mass dependence is clarified.


title: Rare radiative leptonic decays B_{d,s}-> l^+l^-\gamma

abstract:
  Long-distance QCD effects in $B_{d,s}\to\ell^+\ell^-\gamma$ decays are
analyzed. We show that the contribution of the light vector-meson resonances
related to the virtual photon emission from valence quarks of the $B$-meson,
which was not considered in previous analyses, strongly influences the dilepton
differential distrubution. Taking into account photon emission from the
$b$-quark loop, weak annihilation, and Bremsstrahlung from leptons in the final
state, we give predictions for dilepton spectrum in $B_{d, s}\to
\ell^+\ell^-\gamma$ decays within the Standard model.


title: Some comments on the handbag approach to wide-angle exclusive scattering

abstract:
  The handbag mechanism for wide-angle exclusive scattering reactions is
discussed and compared to other theoretical approaches. The role of power laws
in observables is critically examined. Applications of the handbag mechanism to
Compton scattering and meson photoproduction are presented. The soft physics
input to these processes are specific form factors which represent 1/x moments
of generalized parton distributions at zero skewness. A recent analysis of the
nucleon form factors provide these GPDs and, hence, the new form factors.


title: The 't Hooft determinant resolution of the eta' puzzle

abstract:
  The six-quark instanton induced 't Hooft interaction, which breaks the
unwanted U_A(1) symmetry of QCD, is also a sourse of semi-classical corrections
to the low energy effective action. It is argued that there emerges a
dimensionless expansion parameter that introduces a new mass scale,
Lambda_E^2=6 GeV^2, in the 0^-, 0^+ channels. This scale plays a similar role
as the large critical mass M^2_crit > 4.2-6.6 GeV^2 discovered in the framework
of QCD sum rules in the 0^-, 0^+ gluonic channels. In particular, it allows to
resolve the eta' puzzle. To extract Lambda_E we calculate the masses of the
lightest pseudoscalar meson nonet by using the Nambu --Jona-Lasinio (NJL) type
U_L(3)X U_R(3) chiral symmetric Lagrangian together with the 't Hooft
determinant. The mechanism which leads to the large value of Lambda_E is
scrutinized.


title: CKM matrix from non-leptonic B-decays

abstract:
  We analyze the impact of the forthcoming CP-violating observables in the
$B_s\to K^+ K^-$ system, combined with the precise measurement of $\sin2\beta$
, in the extraction of the CKM matrix. Computing the penguin parameters $(r,
\theta)$ within QCD factorization yields a precise determination of $(\bar\rho,
\bar\eta)$, reflected by a weak dependence on $\theta$, which is shown to be a
second order effect. Using the SU(3)-flavour symmetry argument and the current
$B$-factories data provided by the $B_d \to \pi^+ \pi^-$ modes, we complement
the $B_s \to K^+ K^-$ CP-violating observables in a variety of ways, in
particular we find that $S_{KK}>0$. Finally, we investigate systematically the
SU(3)-symmetry breaking factor within QCD factorization.


title: Charged Kaon K -> 3 pi CP Violating Asymmetries

abstract:
  First full next-to-leading order analytical results in Chiral Perturbation
Theory for the charged Kaon K -> 3 pi slope g and decay rates CP-violating
asymmetries are presented. We discuss the constraints that a measurement of
these asymmetries would impose on the Standard Model calculations of epsilon_K'
and the kind of information it can provide on Im G_8, Im (e^2 G_E) and higher
order weak couplings.


title: An improved description of charged Higgs boson production

abstract:
  Many extensions of the Standard Model predict the existence of charged Higgs
bosons. In order to be able to find those particles, an accurate description of
their production is needed. In Monte Carlo simulations of charged Higgs boson
production at hadron colliders, the two tree-level processes gb->H+/-t and
gg->H+/-tb are used. Since those processes overlap in the collinear region of
the phase-space of the outgoing b-quark, care must be taken not to introduce
double-counting if both processes are to be used together. In this talk I
present a method for matching these processes, developed by Johan Rathsman and
myself. The method also allows for investigations of the factorization scale
dependence of the processes and a better understanding of which factorization
scale to choose to get a reliable description of charged Higgs production.


title: Neutrino spin-flavor oscillations in rapidly varying external fields

abstract:
  We study neutrino spin-flavor oscillations in presence of rapidly varying
external fields. The general formalism for the description of neutrino
oscillations in arbitrary rapidly varying external fields is elaborated. We
obtain the effective Hamiltonian which determines the evolution of the averaged
neutrino wave function. We apply the general technique to neutrino oscillations
in rapidly varying magnetic fields. The special case of the constant
transversal and twisting magnetic fields is studied. We evaluate the effect of
neutrino spin-flavor oscillations in rapidly varying magnetic fields of the
Sun. The numerical solutions of the Schroedinger equation with the Hamiltonian
accounting for the constant transversal and twisting magnetic fields are
presented. We compare them with our approximate analytical transition
probability formula and reveal good agreement at high frequencies of the
twisting magnetic field.


title: QCD Sum Rules and Models for Generalized Parton Distributions

abstract:
  I use QCD sum rule ideas to construct models for generalized parton
distributions. To this end, the perturbative parts of QCD sum rules for the
pion and nucleon electromagnetic form factors are interpreted in terms of GPDs
and two models are discussed. One of them takes the double Borel transform at
adjusted value of the Borel parameter as a model for nonforward parton
densities, and another is based on the local duality relation. Possible ways of
improving these Ans{\"a}tze are briefly discussed.


title: Electroweak Corrections and Unitarity in Linear Moose Models

abstract:
  We calculate the form of the corrections to the electroweak interactions in
the class of Higgsless models which can be "deconstructed'' to a chain of SU(2)
gauge groups adjacent to a chain of U(1) gauge groups, and with the fermions
coupled to any single SU(2) group and to any single U(1) group along the chain.
The primary advantage of our technique is that the size of corrections to
electroweak processes can be directly related to the spectrum of vector bosons
("KK modes"). In Higgsless models, this spectrum is constrained by unitarity.
Our methods also allow for arbitrary background 5-D geometry, spatially
dependent gauge-couplings, and brane kinetic energy terms. We find that, due to
the size of corrections to electroweak processes in any unitary theory,
Higgsless models with localized fermions are disfavored by precision
electroweak data. Although we stress our results as they apply to continuum
Higgsless 5-D models, they apply to any linear moose model including those with
only a few extra vector bosons. Our calculations of electroweak corrections
also apply directly to the electroweak gauge sector of 5-D theories with a bulk
scalar Higgs boson; the constraints arising from unitarity do not apply in this
case.


title: Determining the sign of the b -> s gamma amplitude

abstract:
  The latest Belle and BaBar measurements of the inclusive B -> X_s l^+ l^-
branching ratio have smaller errors and lower central values than the previous
ones. We point out that these results indicate that the sign of the b -> s
gamma amplitude is the same as in the SM. This underscores the importance of B
-> X_s l^+ l^- in searches for new physics, and may be relevant for neutralino
dark matter analyses within the MSSM.


title: Large $N_c$ QCD at non-zero chemical potential

abstract:
  The general issue of large $N_c$ QCD at nonzero chemical potential is
considered with a focus on understanding the difference between large $N_c$ QCD
with an isospin chemical potential and large $N_c$ QCD with a baryon chemical
potential. A simple diagrammatic analysis analogous to `t Hooft's analysis at
$\mu=0$ implies that the free energy with a given baryon chemical potential is
equal to the free energy with an isospin chemical potential of the same value
plus $1/N_c$ corrections. Phenomenologically, these two systems behave quite
differently. A scenario to explain this difference in light of the diagrammatic
analysis is explored. This scenario is based on a phase transition associated
with pion condensation when the isospin chemical potential exceeds $m_\pi/2$;
associated with this transition there is breakdown of the $1/N_c$ expansion--in
the pion condensed phase there is a distinct $1/N_c$ expansion including a
larger set of diagrams. While this scenario is natural, there are a number of
theoretical issues which at least superficially challenge it. Most of these can
be accommodated. However, the behavior of quenched QCD which raises a number of
apparently analogous issues cannot be easily understood completely in terms of
an analogous scenario. Thus, the overall issue remains open.


title: Skyrmions and the pion mass

abstract:
  We present numerical evidence that suggests the introduction of a non-zero
pion mass might dramatically affect the structure of minimal energy Skyrmions.
It appears that the shell-like Skyrmions which are the minima when the pions
are massless can fail to be minimal energy bound states for particular baryon
numbers, with a strong dependence upon the value of the pion mass. The effects
of a pion mass may include the replacement of shell-like configurations with
crystal chunks and the loss of shell-like bound states with baryon numbers five
and eight; which is in agreement with expectations based on real nuclei.


title: Late-time entropy production due to the decay of domain walls

abstract:
  It is shown that late-time decay of domain walls can dilute unwanted relics
such as moduli, if the universe was dominated by frustrated domain walls with
tension $\sigma = (1 - 100 TeV)^3$. Since energy density of the frustrated
domain walls decreases as slow as the inverse of the scale factor, an
overclosure limit on the axion decay constant $f_a$ is also considerably
relaxed. In fact $f_a$ can be as large as the Planck scale, which may enable us
to naturally implement the QCD axion in the string scheme. Furthermore, in
contrast to thermal inflation models, the Affleck-Dine baryogenesis can
generate enough asymmetry to explain the present baryon abundance, even in the
presence of late-time entropy production.


title:
Low-x contribution to the Bjorken sum rule within unified $ln^2x+$LO
  DGLAP approximation

abstract:
  The small-$x$ contributions to the Bjorken sum rule within unified picture
$ln^2x+$LO DGLAP for different input parametrisations $g_1^{NS}(x,Q_0^2)$ are
presented. Theoretical predictions for $\int_{0}^{0.003} g_1^{NS}(x,Q^2=10) dx$
are compared with the SMC small-$x$ data. Rough estimation of the slope
$\lambda$, controlling the small-$x$ behaviour of $g_1^{NS}\sim x^{-\lambda}$
from the obtained results and SMC data is performed. The crucial role of the
running coupling $\alpha_s=\alpha_s(Q^2/z)$ at low-$x$ is taken into account.


title: A New SUSY mass reconstruction method at the CERN LHC

abstract:
  We propose a new mass reconstruction technique for SUSY processes at the LHC.
The idea is to completely solve the kinematics of the SUSY cascade decay by
using the assumption that the selected events satisfy the same mass shell
conditions of the sparticles involved in the cascade decay. Using this
technique, we study the measurement of the mass of the bottom squarks in the
cascade decay of the gluino. Based on the final state including two high p_T
leptons and two b-jets, we investigate different possible approaches to the
mass reconstruction of the gluino and the two bottom squarks. In particular we
evaluate the performance of different algorithms in discriminating two bottom
squark states with a mass difference as low as 5%.


title: Review of Monte Carlo methods for particle multiplicity evaluation

abstract:
  I present a brief review of the existing models for particle multiplicity
evaluation in heavy ion collisions which are at our disposal in the form of
Monte Carlo simulators. Models are classified according to the physical
mechanisms with which they try to describe the different stages of a
high-energy collision between heavy nuclei. A comparison of predictions, as
available at the beginning of year 2000, for multiplicities in central AuAu
collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and PbPb
collisions at the CERN Large Hadron Collider (LHC) is provided.


title: Jet quenching

abstract:
  Jet quenching studies play a prominent role in our current understanding of
ultra-relativistic heavy ion collisions. In this review I first present the
available formalism to compute medium-induced gluon radiation. Then I discuss
its effect on single particle spectra, with dedicated attention to the case of
the radiating parton being a massive quark. Next I examine more differential
observables like jet shapes and multiplicities, and the consequences of flow on
radiative energy loss. I conclude with some remarks.


title: Nuclear Shadowing and Diffraction

abstract:
  The relation between diffraction in lepton-proton collisions and shadowing of
nuclear structure functions which arises from Gribov inelastic shadowing, is
described. A model realizing such relation, which produces a parameter-free
description of experimental data on nuclear structure functions at small $x$,
is presented. The application to the description of multiplicities in nuclear
collisions is discussed and related to other approaches.


title:
Jet production in pA and AA collisions in the perturbative QCD pomeron
  model

abstract:
  Inclusive cross-sections for gluon jet production are studied numerically in
the perturbative QCD pomeron model for pA and central AA collisions at high
energies. Two forms for the inclusive cross-sections, with and without emission
from the triple pomeron vertex, are compared. The difference was found to
reduce to a numerical factor 0.7-0.8 for momenta below the saturation momentum
Q_s. Above Q_s no difference was found at all. For pA collisions the jet
spectrum was found to be \sim A^{0.7} at momenta below Q_s and \sim A^{0.9}
above it. For central AA collisions it was found to be \sim A below Q_s and
\sim A^{1.1} above it. At large momenta k the spectrum goes like 1/k^{2.7 -
3.3} flattenung with energy.


title: Phenomenology of a leptonic goldstino and invisible Higgs boson decays

abstract:
  Non-linearly realized supersymmetry, combined with the Standard Model field
content and SU(3)XSU(2)XU(1) gauge invariance, permits local dimension-six
operators involving a goldstino, a lepton doublet and a Higgs doublet. These
interactions preserve total lepton number if the left-handed goldstino
transforms as an antilepton. We discuss the resulting phenomenology, in the
simple limit where the new couplings involve only one lepton family, thus
conserving also lepton flavour. Both the Z boson and the Higgs boson can decay
into a neutrino and a goldstino: the present limits from the invisible Z width
and from other observables leave room for the striking possibility of a Higgs
boson decaying dominantly, or at least with a sizable branching ratio, via such
an invisible mode. We finally comment on the perspectives at hadron and lepton
colliders, and on possible extensions of our analysis.


title:
Precise predictions for Higgs production at e+ e- colliders and
  Numerical calculation of one-loop integrals

abstract:
  Some of the most interesting Higgs-production processes at future e+ e-
colliders are of the type e+ e- -> f anti-f H. We present a calculation of the
complete O(alpha) corrections to these processes in the Standard Model for
final-state neutrinos and top quarks. Initial-state radiation beyond O(alpha)
at the leading-logarithmic level as well as QCD corrections are also included.
The electroweak corrections turn out to be sizable and reach the order of
+/-10% and will thus be an important part of precise theoretical predictions
for future e+ e- colliders.
  Furthermore, an overview is given of a technique for a fast and reliable
numerical calculation of multi-leg one-loop integrals. The method is
numerically stable also for exceptional momentum configurations and easily
allows the introduction of complex masses and the calculation of higher orders
in the expansion around D=4.


title: Some Analytical Aspects in Field Theories with Dynamical Mass Generation

abstract:
  The consequence of dynamical mass generation on the singularity structure of
propagators is discussed. First the phenomena of dynamical mass generation is
discussed in the framework of Euclidean gap equations, then a possible
Minkowski solution is looking for. The examples are reviewed and studied for
several models: Yukawa, QED, QCD and Wess-Zumino. It is argued that the absence
of propagator pole goes hand by hand with the nontrivial solution for mass
function. The consequences are discussed.


title: The X(3872) and the 3941 MeV peak in omega+J/Psi

abstract:
  Belle data for the pi-pi mass spectrum in X(3872) -> pi-pi + JPsi are well
fitted by rho + J/Psi with JPC = 1++, but are poorly fitted by the pi-pi
S-wave. Formulae for partial wave amplitudes are given for all likely JPC and
decay modes of the 3941 MeV peak in omega + J/Psi. Angular correlations
involving up to five angles may allow a spin-parity determination, even with
quite low statistics. Special attention is given to the case where X(3872) is a
cusp or quasi-bound state with the same quantum numbers as the 3941 MeV peak.


title: Gravitino production from reheating in split supersymmetry

abstract:
  We discuss gravitino production from reheating in models where the splitting
between particle and sparticle masses can be larger than TeV, as naturally
arising in the context of split supersymmetry. We show that such a production
typically dominates over thermal contributions arising from the interactions of
gauginos, squarks and sleptons. We constrain the supersymmetry breaking scale
of the relevant sector for a given reheat temperature. However the situation
changes when the gravitinos dominate the Universe and decay before
nucleosynthesis. We briefly describe prospects for a successful baryogenesis
and a viable neutralino dark matter in this case.


title: Reducing the Error on alpha in B-> pi pi, rho rho, rho pi

abstract:
  Theoretical errors in the extraction of alpha from B -> pi^+ pi^-, rho^+
rho^-, rho pi decays are usually given in terms of upper bounds on
alpha_eff-alpha obtained from isospin or from SU(3) relations, where alpha_eff
is measured through CP asymmetries. We show that mild assumptions about
magnitudes and strong phases of penguin and tree amplitudes (|P/T| < 1 and
|delta| < pi/2) in B -> pi pi and B -> rho rho, imply alpha_eff > alpha, thus
reducing by a factor two the error in alpha. Similarly, the assumptions
|p_+-/t_+-| < 1, |\delta_-| < pi/2 <|\delta_+| in B -> rho pi lead to a
cancellation between two terms in alpha_eff-alpha. Current data support these
conditions.


title: V_{us} from hyperon semileptonic decays

abstract:
  A model-independent determination of the CKM matrix element V_{us} from five
measured strangeness-changing hyperon semileptonic decays is performed. Flavor
SU(3) symmetry breaking effects in the leading vector and axial-vector form
factors are analyzed in the framework of the 1/N_c expansion of QCD. A fit to
experimental data allows one to extract the value V_{us}=0.2199\pm 0.0026,
which is comparable to the one from K_{e3} decays. This reconciliation is
achieved through second-order symmetry breaking effects of a few percent in the
form factors f_1, which increase their magnitudes over their SU(3) predictions.


title:
Some possible explanations of the discrepancies in the results of
  modelling the leakage current of detectors after hadron irradiation

abstract:
  In this contribution we argue that the main discrepancies between model
calculations and experimental data for leakage current after hadron irradiation
could be explained considering the contributions of primary defects in silicon:
vacancy, interstitial and Si_FFCD defect. The source of discrepancies between
data and previous modelling was tentatively attributed to the Si_FFCD defect.
Vacancies and interstitials have a major contribution to the current short time
after irradiation. If these hypotheses are correct, thus, in conditions of
continuous long time irradiation, as e.g. LHC and its upgrades in energy and
luminosity, S-LHC and V-LHC respectively, these contributions will represent a
major problem.


title: CP violation and the CKM matrix: impact of the asymmetric B Factories

abstract:
  An up-to-date profile of the CKM matrix is presented, with emphasis on the
interpretation of recent CP-violation results from the $B$ factories. The apex
of the Unitarity Triangle is determined by a global CKM fit. A study is
performed to probe the dynamics of B decays into $\pi\pi$, $K\pi$, $\rho\pi$
and $\rho\rho$ within two theoretical frameworks. A model-independent
investigation of New Physics effects in $\Bz\Bzb$ mixing is given.


title: Effects of CP-violating phases in supersymmetry

abstract:
  Recent studies about the impact of the CP-violating complex parameters in
supersymmetry on the decays of third generation squarks and about T-odd
asymmetries in neutralino and chargino production and decay are reviewed. The
CP-even branching ratios of the third generation squarks show a pronounced
dependence on the phases of A_t, A_b, mu and M_1 in a large region of the
supersymmetric parameter space. This could have important implications for stop
and sbottom searches and the MSSM parameter determination in future collider
experiments. We have estimated the expected accuracy in the determination of
the parameters by global fits of measured masses, decay branching ratios and
production cross sections. We have found that the parameter A_t can be
determined with an error of 2 - 3%, whereas the error on A_b is likely to be of
the order of 50 - 100%. In addition we have studied CP-odd observables, like
asymmetries based on triple product correlations, which are necessary to
unambiguously establish CP violation. We have analysed these asymmetries in
neutralino and chargino production with subsequent three-body decays at the
International Linear Collider with longitudinally polarised beams in the MSSM
with complex parameters M_1 and mu. The asymmetries, which appear already at
tree-level because of spin correlation between production and decay, can be as
large as 20% and will therefore be an important tool for the search for
CP-violating effects in supersymmetry.


title:
Tritium beta-decay endpoint for a Tachyonic Neutrino that travels Faster
  than Light

abstract:
  In this paper, we study the tritium $\beta-$decay in the field theory of the
superluminal (faster-than-light) neutrino. We show how the unstable transient
modes with $\vec{q} \cdot \vec{q} < m_{\nu}^2$ lead to an excess of events at
the endpoint.