title: Two Body B Decays, Factorization and LambdaQCD/mb Corrections

abstract:
  By using the recent experimental measurements of B -> pi pi and B -> K pi
branching ratios, we find that the amplitudes computed at the leading order of
the LambdaQCD/mb expansion disagree with the observed BRs, even taking into
account the uncertainties of the input parameters. Beyond the leading order,
Charming and GIM penguins allow to reconcile the theoretical predictions with
the data. Because of these large effects, we conclude, however, that it is not
possible, with the present theoretical and experimental accuracy, to determine
the CP violation angle gamma from these decays. We compare our results with
those obtained with the parametrization of the chirally enhanced
non-perturbative contributions by BBNS. We also predict large asymmetries for
several of the particle--antiparticle BRs, in particular BR(B+ -> K+ pi0),
BR(Bd -> K+ pi-) and BR(Bd -> pi+ pi-).


title: Kaon Physics from Lattice QCD

abstract:
  The latest lattice results on kaon decays and mixing are reviewed. The
discussion is focused on recent theoretical progress and new numerical
calculations which appeared after Kaon 1999.


title: Real Time Dynamics of Symmetry Breaking

abstract:
  The dynamics of symmetry breaking is an important issue in many branches of
physics including the real time onset of the Higgs-effect. In this thesis I
examine the linear and non-linear evolution of different systems in the broken
symmetric phase. The method of the analytical investigation is to derive
effective equations of motion for the soft modes of the theory. Numerical
investigation were performed for out-of-equilibrium classical systems. The
dynamics of the one-component scalar theory both in the linear-response
approximation and for large deviations from equilibrium is investigated. The
real time characterisation of the Goldstone effect when a condensate breaks the
O(N) symmetry of the quantum and classical field theory is given. The
corrections to the Hard Thermal Loop dynamics in the Abelian Higgs model, which
reflect the presence of the scalar condensate are calculated. An equation of
motion for the soft gauge field that incorporates the effect of the scalar
condensate is proposed to be used deep in the broken phase of the Abelian Higgs
model.


title: Hard and Soft Contributions in Diffraction

abstract:
  We report our calculations on the logarithmic slope of the diffractive
structure function F_2^D considering distinct approaches coming from both the
pQCD and the Regge descriptions of diffractive DIS. Such a quantity is a
potential observable to discriminate between pQCD and Regge domains and allows
to disentangle the underlying dynamics.


title: Exclusive and Semi-inclusive B Decays in QCD Factorization

abstract:
  Applications of QCD factorization to $B\to\phi K$, charmless $B\to VV$, $B\to
J/\psi K(K^*)$ and semi-inclusive decays $B\to MX$ are discussed.


title:
The non-perturbative constraint on sea quarks --the strange sea quarks
  in the nucleon and the soft pion contribution at high energy--

abstract:
  The mean charge sum rule for the light sea quarks in the nucleon which holds
under the same theoretical footing as the modified Gottfried sum rule shows
that a usual parameterization of the strange sea quark distribution
underestimate its contribution in the small $x$ region. We give a discussion of
the soft pion contribution at high energy as a possible explanation of the
saturation of the sum rule and show that it naturally explains why the strange
sea quark is suppressed in the region above $x \sim 0.01$ while it becomes
abundant below it.


title:
Threshold expansion for heavy-light systems and flavor off-diagonal
  current-current correlators

abstract:
  An expansion scheme is developed for Feynman diagrams describing the
production of one massive and one massless particle near the threshold. As an
example application, we compute the correlators of heavy-light quark currents,
(\bar b gamma_mu u) and (\bar b gamma_5 u), through O(alpha_s^2).


title: Quark Distributions of Octet Baryons from SU(3) Symmetry

abstract:
  SU(3) symmetry relations between the octet baryons are introduced in order to
connect both the unpolarized and polarized quark distributions of the octet
baryons with those of the nucleon. Two different parametrizations of the
nucleon quark distributions are used. A new scenario of quark flavor and spin
structure of the $\Lambda$ is found and compared with two other models: a
perturbative QCD based analysis and a quark diquark model. The $u$ and $d$
quarks inside the $\Lambda$ are predicted to be positively polarized at large
Bjorken variable $x$ in the new scenario. By using an approximate relation
connecting the quark fragmentation functions with the quark distributions, the
hadron polarizations of the octet baryons in $e^+e^-$-annihilation, polarized
charged lepton deep inelastic scattering (DIS) processes, and neutrino
(antineutrino) DIS processes are predicted. The predictions for $\Lambda$
polarizations in several processes are compatible with the available data at
large fragmentation momentum fraction $z$, and support the prediction of
positively polarized $u$ and $d$ quarks inside the $\Lambda$ at large $x$.
Predictions for Drell-Yan processes from $\Sigma^{\pm}$ and $\Xi^-$ beams on an
isoscalar target are also given and discussed.


title:
On Search for New Physics in Nonequilibrium Reactor Antineutrino Energy
  Spectrum

abstract:
  The calculations of the time-dependent reactor antineutrino energy spectrum
are presented. Some problems associated with sensitive searches for neutrino
magnetic moment and neutrino oscillations in reactor antineutrino flux are
considered.


title: Erratum for "Supersymmetric Electroweak Baryogenesis"

abstract:
  We correct a numerical error which led to an overestimate of the baryon
asymmetry from supersymmetric electroweak baryogenesis in our paper
JHEP07(2000)018. Updated dependences of the baryon asymmetry on chargino mass
parameters and the bubble wall velocity are shown. We also include
LEP-II-constraints on the chargino mass parameters. Combined with our corrected
results for the baryon asymmetry these constraints imply that the phase in the
chargino mass matrix must violate CP nearly maximally in order to generate a
large enough baryon asymmetry. A number of other typographical errors are also
corrected.


title:
Bottom-Tau Unification in SUSY SU(5) GUT and Constraints from b to s
  gamma and Muon g-2

abstract:
  An analysis is made on bottom-tau Yukawa unification in supersymmetric (SUSY)
SU(5) grand unified theory (GUT) in the framework of minimal supergravity, in
which the parameter space is restricted by some experimental constraints
including Br(b to s gamma) and muon g-2. The bottom-tau unification can be
accommodated to the measured branching ratio Br(b to s gamma) if superparticle
masses are relatively heavy and higgsino mass parameter \mu is negative. On the
other hand, if we take the latest muon g-2 data to require positive SUSY
contributions, then wrong-sign threshold corrections at SUSY scale upset the
Yukawa unification with more than 20 percent discrepancy. It has to be
compensated by superheavy threshold corrections around the GUT scale, which
constrains models of flavor in SUSY GUT. A pattern of the superparticle masses
preferred by the three requirements is also commented.


title: Mixing of meson, hybrid, and glueball states

abstract:
  The effective QCD Hamiltonian is constructed with the help of the background
perturbation theory, and relativistic Feynman--Schwinger path integrals for
Green's functions. The resulting spectrum displays mass gaps of the order of
one GeV, when additional valence gluon is added to the bound state. Mixing
between meson, hybrid, and glueball states is defined in two ways: through
generalized Green's functions and via modified Feynman diagram technic giving
similar answers. Results for mixing matrix elements are numerically not large
(around 0.1 GeV) and agree with earlier analytic estimates and lattice
simulations.


title:
Heavy Quark production at the TEVATRON and HERA using k_t-factorization
  with CCFM evolution

abstract:
  The application of k_t-factorization supplemented with the CCFM small-x
evolution equation to heavy quark production at the TEVATRON and at HERA is
discussed. The bb_bar production cross sections at the TEVATRON can be
consistently described using the k_t-factorization formalism together with the
unintegrated gluon density obtained within the CCFM evolution approach from a
fit to HERA F_2 data. Special attention is drawn to the comparison with
measured visible cross sections, which are compared to the hadron level Monte
Carlo generator CASCADE


title: Radion and Higgs mixing at the LHC

abstract:
  We study the resonance production of radions and Higgs via gluon-gluon fusion
in the Randall-Sundrum model with Higgs-curvature mixing at the LHC. We find
that radion can be detected both in mixed (with Higgs boson) and unmixed case
if the radion vacuum expectation value $\Lambda_\phi$ is around 1 TeV. The
$\Lambda_\phi \sim 10$ TeV case is also promising for certain values of mixing
parameters and radion masses. The mixing can affect the production and decay of
Higgs boson in a significant way. Thus Higgs search strategies at the LHC may
need refinements in case of radion-Higgs mixing in the Randall-Sundrum model.


title: A Next-to-Leading-Order Study of Dihadron Production

abstract:
  The production of pairs of hadrons in hadronic collisions is studied using a
next-to-leading-order Monte Carlo program based on the phase space slicing
technique. Up-to-date fragmentation functions based on fits to LEP data are
employed, together with several versions of current parton distribution
functions. Good agreement is found with data for the dihadron mass
distribution. A comparison is also made with data for the dihadron angular
distribution. The scale dependence of the predictions and the dependence on the
choices made for the fragmentation and parton distribution functions are also
presented. The good agreement between theory and experiment is contrasted to
the case for single $\pi^0$ production where significant deviations between
theory and experiment have been observed.


title: CP Violation in a SUSY SO(10) x U(2)_{F} Model

abstract:
  We construct a model based on SUSY SO(10) combined with U(2) family symmetry
including complex phases leading to CP violation. In contrast with the commonly
used effective operator approach, \bar{126}-dimensional Higgs fields are
utilized to construct the Yukawa sector. R-parity symmetry is thus preserved at
low energies. The symmetric mass textures arising from the left-right symmetry
breaking chain of SO(10) give rise to very good predictions for quark and
lepton masses and mixings. The prediction for \sin 2\beta agrees with the
current bounds from BaBar and Belle. In the neutrino sector, our predictions
are in good agreement with results from atmospheric neutrino experiments. Our
model favors both the LOW and QVO solutions to the solar neutrino anomaly; the
matrix element for neutrinoless double beta decay is highly suppressed. The
leptonic analog of the Jarlskog invariant, J_{CP}^{l}, is predicted to be of
O(10^{-2}).


title: Nuclear enhanced power corrections to DIS structure functions

abstract:
  We calculate nuclear enhanced power corrections to structure functions
measured in deeply inelastic lepton-nucleus scattering in Quantum
Chromodynamics (QCD). We find that the nuclear medium enhanced power
corrections at order of $O(\alpha_s/Q^2)$ enhance the longitudinal structure
function $F_L$, and suppress the transverse structure function $F_1$. We
demonstrate that strong nuclear effects in $\sigma_A/\sigma_D$ and $R_A/R_D$,
recently observed by HERMES Collaboration, can be explained in terms of the
nuclear enhanced power corrections.


title: On spectroscopy of rho', rho'', and omega', omega'' resonances

abstract:
  Based on coupling constants extracted from fitting various data, the selected
branching ratios and full widths of rho', rho'', and omega', omega'' resonances
are calculated, and some topics on the spectroscopy of these states are
discussed.


title: Gauge Mediation Models with Neutralino Dark Matter

abstract:
  We study gauge mediation models of supersymmetry breaking with neutralino
LSP. These models are naturally realized by embedding the usual
four-dimensional gauge mediation models into a higher-dimensional spacetime
such as $M^4 \times S^1 / Z_{2}$. We calculate the relic abundance of the
neutralino LSP in these models and show that there exist wide parameter regions
where the neutralino LSP constitutes the dominant component of the cold dark
matter. These regions evade constraints from collider experiments such as Higgs
mass bounds and $b \ra s \gamma$, and also provide the value for the muon
anomalous magnetic moment which is consistent with the SUSY explanation of the
deviation from the standard model prediction.


title: Softly broken lepton numbers: an approach to maximal neutrino mixing

abstract:
  We discuss models where the U(1) symmetries of lepton numbers are responsible
for maximal neutrino mixing. We pay particular attention to an extension of the
Standard Model with three right-handed neutrino singlets in which we require
that the three lepton numbers L_e, L_\mu, and L_\tau be separately conserved in
the Yukawa couplings, but assume that they are softly broken by the Majorana
mass matrix M_R of the neutrino singlets. In this framework, where
lepton-number breaking occurs at a scale much higher than the electroweak
scale, deviations from family lepton number conservation are calculable, i.e.,
finite, and lepton mixing stems exclusively from M_R. We show that in this
framework either maximal atmospheric neutrino mixing or maximal solar neutrino
mixing or both can be imposed by invoking symmetries. In this way those maximal
mixings are stable against radiative corrections. The model which achieves
maximal (or nearly maximal) solar neutrino mixing assumes that there are two
different scales in M_R and that the lepton number \bar L = L_e - L_\mu -
L_\tau is conserved in between them. We work out the difference between this
model and the conventional scenario where (approximate) \bar L invariance is
imposed directly on the mass matrix of the light neutrinos.


title:
Some questions concerning Bose-Einstein correlations in multiple
  particle production processes

abstract:
  Most models of Bose-Einstein correlations in multiple particle production
processes can be ascribed to one of the following three broad classes: models
based on the original idea of the Goldhabers, Lee nad Pais, hydrodynamic models
and string models. We present for discussion some basic questions concerning
each of these classes of models.


title: Balance Functions, Correlations, Charge Fluctuations and Interferometry

abstract:
  Connections between charge balance functions, charge fluctuations and
correlations are presented. It is shown that charge fluctuations can be
directly expressed in terms of a balance functions under certain assumptions.
The distortion of charge balance functions due to experimental acceptance is
discussed and the effects of identical boson interference is illustrated with a
simple model.


title: Resurrecting the KH78/80 partial wave analysis

abstract:
  Most of the data from the meson factories were available only after the $\pi
N$ partial wave analysis of Koch and Pietarinen was published over 20 years
ago. Since then, both the experimental precision and the theoretical framework
have evolved a lot as well as the computing technology. Both the new and the
earlier data are to be analysed by a highly modernised version of the earlier
approach. Especially the propagation of the measurement errors in the analysis
will be considered in detail, visualisation tools will be developed using the
Python/Tkinter combination, and the huge data base of experiments will be
handled by MySQL.


title: Neutrino masses with a single generation in the bulk

abstract:
  In a class of multidimensional models, topology of the thick brane provides
three chiral fermionic families with hierarchical masses and mixings in the
effective four-dimensional theory, while the full model contains a single
vector-like generation. We discuss how to incorporate three non-degenerate
neutrino masses in these models with the help of only one singlet bulk fermion.


title: Massive Quark Propagator in the Color-superconducting Phase

abstract:
  A more general expression for the quark propagator including both chiral and
diquark condensates has been derived by using energy projectors. This makes it
possible to study the phase transition from hadron phase to color
superconductivity phase in the moderate baryon density region by using Feynman
diagrammatic method or Green-function method.


title: First Order Radiative Corrections to Polarized Muon Decay Spectrum

abstract:
  The first order QED corrections to the polarized muon decay spectrum are
considered. The exact dependence on electron and muon masses is kept. Numerical
results are presented.


title:
High-mass dimuon, B anti-B and B --> J/Psi production in
  ultrarelativistic nucleus-nucleus interactions

abstract:
  The potential of B-physics in ultrarelativistic heavy ion collisions is
discussed. The different mechanisms of heavy quark production at high energies
are considered. We analyze the sensitivity of high-mass mu+mu- pairs from BBbar
semileptonic decays and secondary J/Psi's from single B decays to the
medium-induced bottom quark energy loss at LHC energies.


title: Anomaly Mediated Supersymmetry Breaking without R-Parity

abstract:
  We analyze the low energy features of a supersymmetric standard model where
the anomaly--induced contributions to the soft parameters are dominant in a
scenario with bilinear $R$--parity violation. This class of models leads to
mixings between the standard model particles and supersymmetric ones which
change the low energy phenomenology and searches for supersymmetry. In
addition, $R$--parity violation interactions give rise to small neutrino masses
which we show to be consistent with the present observations.


title: The CP Puzzle in the Strong Interactions

abstract:
  This lecture, directed to an broad audience including non-specialists,
presents a short review of the problem of strong CP symmetry maintenance. The
problem is defined and the possible solutions briefly reviewed. I discuss the
way in which Roberto Peccei and I came up with one solution, generally known as
Peccei-Quinn symmetry.


title: QCD thermodynamics at finite density

abstract:
  Recent progress in extending finite temperature lattice QCD simulations from
the $T$ axis into the finite density plane is reviewed. The covered topics are
a calculation of the transition line by multidimensional reweighting, screening
mass calculations in dimensionally reduced QCD and simulations at imaginary
$\mu$.


title:
Neutral Higgs sector of the next-to-minimal supersymmetric standard
  model with explicit CP violation

abstract:
  The neutral Higgs sector of the next-to-minimal supersymmetric standard model
(NMSSM) with explicit CP violation is investigated at the 1-loop level, using
the effective potential method; not only the loops involving the third
generation of quarks and scalar quarks, but also the loops involving $W$ boson,
charged Higgs boson, and chargino are taken into account. It is found that for
some parameter values of the NMSSM the contributions from the $W$ boson,
charged Higgs boson, and chargino loops may modify the masses of the neutral
Higgs bosons and the mixings among them significantly, depending on the CP
phase. In $e^+e^-$ collisions, the prospects for discovering neutral Higgs
bosons are investigated within the context of the NMSSM with explicit CP
violation when the dominant component of the lightest neutral Higgs boson is
the Higgs singlet field of the NMSSM.


title: Search for Second Neutral Pion

abstract:
  There is evidence of a second neutral pion from: (1) the anomalous branching
ratios in the reactions p-bar p -> pi pi and p-bar d -> pi pi N, and (2) the
1960's results of Tsai-Chu et al. for antinucleon annihilation stars in
emulsions. The anomaly of (1) is eliminated if the two neutral pions in the
reactions p-bar p -> pi_0 pi_0 and p-bar d -> pi_0 pi_0 n are not identical.
Tsai-Chu et al. observed a second neutral pion that ``decays more rapidly into
electron pairs with larger opening angles and more frequently into double
pairs.'' One antineutron annihilation event produced three neutral particles
(each with a mass of 135 +/- 14 MeV), and each decayed into four electrons with
much wider opening angles than those of the internal conversion electrons seen
in pi-zero decays. The larger opening angles and much more frequent double pair
production could be caused by neutral pions with a lifetime so short that they
sometimes decay into photon pairs before they can leave the annihilation
nucleus (e.g., Ag) of the emulsion. We discuss several methods of searching for
this second neutral pion.


title: Neutron Electric Dipole Moment and Extension of the Standard Model

abstract:
  A nonvanishing value for the electric dipole moment (EDM) of the neutron is a
prominent signature for CP violation. The EDM induced by the Kobayashi-Maskawa
mechanism of the standard model (SM) has a small magnitude and its detection
will be very difficult. However, since baryon asymmetry of the universe cannot
be accounted for by the SM, there should exist some other source of CP
violation, which may generate a large magnitude for the EDM. One of the most
hopeful candidates for physics beyond the SM is the supersymmetric standard
model, which contains such sources of CP violation. This model suggests that
the EDM has a magnitude not much smaller than the present experimental bounds.
Progress in measuring the EDM provides very interesting information about
extension of the SM. ........


title:
Application of Roy's equations to analysis of pion-pion experimental
  data

abstract:
  The scalar-isoscalar, scalar-isotensor and vector-isovector pion-pion partial
wave amplitudes are analyzed. Preliminary results indicate that only the
scalar-isoscalar amplitude fitted to the "down-flat" data satisfies Roy's
equations and consequently crossing symmetry.


title: Vanishing dynamical quark mass at zero virtuality?

abstract:
  We show that the dynamical quark mass in effective nonlocal models can vanish
at zero virtuality of the quark as $M(p^2)\propto p^2$. Our arguments follow
from the constrained-instanton model of the QCD vacuum and from QCD sum rules
calculations with nonlocal condensates. The discussed models also lead to
analyticity of $M(p^2)$ in the vicinity of zero.


title:
Relative phase between the three-gluon and one-photon amplitudes of the
  J/psi decays

abstract:
  It is shown that the study of the \omega-\rho interference pattern in the
J/psi -> (rho+omega)eta -> pi+pi-eta decay provides evidence for the large
(nearly 90 degrees) relative phase between the isovector one-photon and
three-gluon decay amplitudes.


title: QCD_2 in the axial gauge revisited

abstract:
  The 't Hooft model for the two-dimensional QCD in the limit of infinite
number of colours is studied in the axial gauge. The mass-gap and the
bound-state equations are derived using the two consequent Bogoliubov-like
transformations. Chiral properties of the model are studied in the Hamiltonian
and matrix approaches to the latter. Special attention is payed to the explicit
pionic solution of the bound-state equation.


title:
Analysis of nature of phi -> gamma pi0 eta and phi -> gamma pi0 pi0
  decays

abstract:
  We study interference patterns in the phi -> gamma a0 + pi0 rho -> gamma pi
eta and phi -> gamma f0 + pi0 rho -> gamma pi0 pi0 reactions. Taking into
account the interference, we fit the experimental data and show that the
background reaction does not distort the pi0eta spectrum in the decay phi ->
gamma pi eta everywhere over the energy region and does not distort the pi0 pi0
spectrum in the decay phi -> gamma pi0 pi0 when the invariant mass m_{pi0 pi0}
> 670 MeV. We discuss the details of the scalar meson production in the
radiative decays and note that there are conclusive arguments in favor of the
one-loop mechanism phi -> K+K- -> gamma a0 (or gamma f0). We discuss also
distinctions between the four-quark, molecular, and two-quark models and argue
that the establishment of the scalar meson production mechanism in the phi
radiative decays gives new strong evidence in favor of the four-quark nature of
the scalar a0(980) and f0(980) mesons.


title: Pionic dressing of baryons in chiral quark models

abstract:
  We present a method for constructing the complete set of meson-exchange
corrections to baryon observables described by covariant chiral quark models.
The meson corrections are expressed in terms of an unperturbed valence-quark
Green's function. This method is illustrated for the case of an NJL model. It
also enables us to discuss, in terms of approximations used for this
unperturbed Green's function, the treatments of meson corrections in two other
chiral quark models.


title:
Time Delay Between Gravitational Waves and Neutrino Burst From a
  Supernova Explosion: a Test for the Neutrino Mass

abstract:
  During Supernova explosions two signals, Gravitational burst wave and
Neutrino Burst, of different nature, originated within 0.1 s from thesuper nova
explosion will be radiated in the outer space. If the neutrinos (as well as the
gravitons) are massless particles, than the original interval (if any) between
the two signals will be freezed forever. On the contrary, if the neutrinos have
a tiny mass, the time delay will increase during the propagation because of the
slower velocity of the neutrinos with respect to the massless gravitons.
Therefore, two signals, of different nature, originated within 0.1 s from the
super nova explosion will be radiated in the outer space. If the neutrinos (as
well as the gravitons) are massless particles, than the original interval (if
any) between the two signals will be freezed forever. If the neutrino has a
mass the time delay will increase during the propagation because of the slower
velocity of the neutrinos with respect to the massless gravitons: the time
delay detection may measure the neutrino mass or its absence may inferr a
severe neutrino mass bound.


title: Timelike Compton scattering: exclusive photoproduction of lepton pairs

abstract:
  We investigate the exclusive photoproduction of a heavy timelike photon which
decays into a lepton pair, gamma p -> l+ l- p. This can be seen as the analog
of deeply virtual Compton scattering, and we argue that the two processes are
complementary for studying generalized parton distributions in the nucleon. In
an unpolarized experiment the angular distribution of the leptons readily
provides access to the real part of the Compton amplitude. We estimate the
possible size of this effect in kinematics where the Compton process should be
dominated by quark exchange.


title: Top quark pair production and decay into 6 fermions at linear colliders

abstract:
  The production of a t\bar{t}-pair and its decay into a 6 fermion final state
of different flavours in e+e- annihilation at centre of mass energies typical
for linear colliders is analyzed in the framework of the Standard Model. The
results of calculation based on exact matrix elements at the tree level and
full 6 particle phase space are compared with a few different approximations.
It is shown that the effects related to off-shellness of the t\bar{t}-pair and
background contributions are sizable both in the continuum and at the
threshold.


title:
The Description of Neutrino and Muon Oscillations by Interfering
  Amplitudes of Classical Space-Time Paths

abstract:
  Particle oscillations following neutrino production processes are analysed
within Feynman's path amplitude formulation of quantum mechanics. Consideration
of the temporal sequence of production and detection events reveals an
important contribution to the oscillation phase from the space-time propagator
of the decaying source particle. Formulae are derived for spatial neutrino
oscillations following pion decay (at rest and in flight), muon decay and
nuclear $\beta$-decay at rest, as well as for similar muon oscillations after
pion decay at rest and in flight. In all cases studied, the neutrino
oscillation phases found differ from the conventionally used one. A concise
critical review is made of previous treatments of the quantum mechanics of
neutrino and muon oscillations.


title:
Fine Structure of Oscillons in the Spherically Symmetric $\phi^4$
  Klein-Gordon Model

abstract:
  We present results from a study of the fine structure of oscillon dynamics in
the 3+1 spherically symmetric Klein-Gordon model with a symmetric double-well
potential. We show that in addition to the previously understood longevity of
oscillons, there exists a resonant (and critical) behavior which exhibits a
time-scaling law. The mode structure of the critical solutions is examined, and
we also show that the upper-bound to oscillon formation (in $r_0$ space) is
either non-existent or higher than previously believed. Our results are
generated using a novel technique for implementing non-reflecting boundary
conditions in the finite difference solution of wave equations. The method uses
a coordinate transformation which blue-shifts and ``freezes'' outgoing
radiation. The frozen radiation is then annihilated via dissipation explicitly
added to the finite-difference scheme, with very little reflection into the
interior of the computational domain.


title:
A Covariant Feynman Path Amplitude Calculation of Neutrino and Muon
  Oscillations

abstract:
  Predictions are presented for the oscillation phase in neutrino oscillations
following pion decay at rest and in flight, muon decay and nuclear
$\beta-$decay at rest as well as for muon oscillations following pion decay at
rest and in flight. The neutrino oscillation phases found disagree with the
conventionally used value: $\phi_{12} = \Delta m^2 L/(2P)$. The same
oscillation phase is found for neutrino and muon oscillations following pion
decay at rest. Shortcomings of previous treatments of the quantum mechanics of
neutrino oscillations are commented on.


title: Stringent neutron-star limits on large extra dimensions

abstract:
  Supernovae (SNe) are copious sources for Kaluza-Klein gravitons which are
generic for theories with large extra dimensions. These massive particles are
produced with average velocities ~0.5 c so that many of them are
gravitationally retained by the SN core. Every neutron star thus has a halo of
KK gravitons which decay into nu bar-nu, e^+e^- and gamma gamma on time scales
\~10^9 years. The EGRET gamma-flux limits (E_gamma ~ 100 MeV) for nearby
neutron stars constrain the fundamental scale for n=2 extra dimensions to M
>500 TeV, and M>30 TeV for n=3. The upcoming GLAST satellite is a factor ~30
more sensitive and thus may detect KK decays, for example at the nearby neutron
star RX J185635--3754. The requirement that neutron stars are not excessively
heated by KK decays implies M>1700 TeV for n=2, and M>60 TeV for n=3.


title:
Light-light and heavy-light mesons in the model of QCD string with
  quarks at the ends

abstract:
  The variational einbein field method is applied to the model of the QCD
string with quarks at the ends for the case of light-light and heavy-light
mesons. Special attention is payed to the proper string dynamics. The correct
string slope of the Regge trajectories is reproduced for light-light states
which comes out from the picture of rotating string. Masses of several
low-lying orbitally and radially excited states in the D, D_s, B, and B_s meson
spectra are calculated and a good agreement with the experimental data as well
as with recent lattice calculations is found. The role of the string correction
to the interquark interaction is discussed at the example of the identification
of D*'(2637) state recently claimed by DELPHI Collaboration. For the
heavy-light mesons the standard constants used in Heavy Quark Effective Theory
are extracted and compared to the results of other approaches.


title:
The analytic continuation of the high-energy parton-parton scattering
  amplitude with an IR cutoff

abstract:
  The high-energy parton-parton scattering amplitude can be described, in the
c.m.s., by the expectation value of two infinite Wilson lines, running along
the classical trajectories of the two colliding particles. The above
description suffers from IR divergences (typical of 3 + 1 dimensional gauge
theories), which can be regularized by considering finite Wilson lines,
extending in proper time from -T to T (and eventually sending T to infinity).
Generalizing the results of a previous paper, we give here the general proof
that the expectation value of two IR-regularized Wilson lines, forming a
certain hyperbolic angle in Minkowski space-time, and the expectation value of
two IR-regularized Euclidean Wilson lines, forming a certain angle in Euclidean
four-space, are connected by an analytic continuation in the angular variables
and in the IR cutoff T. This result can be used to evaluate the IR-regularized
high-energy scattering amplitude directly in the Euclidean theory.


title: Isospin Fluctuations in QCD and Relativistic Heavy-Ion Collisions

abstract:
  We address the role of fluctuations in strongly interacting matter during the
dense stages of a heavy-ion collision through its electromagnetic emission.
Fluctuations of isospin charge are considered in a thermal system at rest as
well as in a moving hadronic fluid at fixed proper time within a finite bin of
pseudo-rapidity. In the former case, we use general thermodynamic relations to
establish a connection between fluctuations and the space-like screening limit
of the retarded photon self-energy, which directly relates to the emissivities
of dileptons and photons. Effects of hadronic interactions are highlighted
through two illustrative calculations. In the latter case, we show that a
finite time scale $\tau$ inherent in the evolution of a heavy-ion collision
implies that equilibrium fluctuations involve both space-like and time-like
components of the photon self-energy in the system. Our study of non-thermal
effects, explored here through a stochastic treatment, shows that an early and
large fluctuation in isospin survives only if it is accompanied by a large
temperature fluctuation at freeze-out, an unlikely scenario in hadronic phases
with large heat capacity. We point out prospects for the future which include:
(1) A determination of the Debye mass of the system at the dilute freeze-out
stage of a heavy-ion collision, and (2) A delineation of the role of charge
fluctuations during the dense stages of the collision through a study of
electromagnetic emissivities.


title:
The Earth Mantle-Core Effect in Matter-Induced Asymmetries for
  Atmospheric Neutrino Oscillations

abstract:
  Earth medium effects in the three-neutrino oscillations of atmospheric
neutrinos are observable under appropriate conditions. This paper generalizes
the study of the medium effects and the possibility of their observation in the
atmospheric neutrino oscillations from the case of neutrinos traversing only
the Earth mantle, where the density is essentially constant, to the case of
atmospheric neutrinos crossing also the Earth core. In the latter case new
resonance-like effects become apparent. We calculate the CPT-odd asymmetry for
the survival probability of muon neutrinos and the observable muon-charge
asymmetry, taking into account the different atmospheric neutrino fluxes, and
show the dependence of these asymmetries on the sign of $\Delta m^{2}_{3 1}$
and on the magnitude of the mixing angle $\theta_{13}$. A magnetized detector
with a sufficiently good neutrino momentum resolution is required for the
observation of the muon-charge asymmetry generated by the Earth mantle-core
effect.


title:
Higgsino and Wino Dark Matter from Q-ball Decay in Affleck-Dine
  Baryogenesis

abstract:
  We claim that the Higgsino-like and wino-like neutralinos can be good dark
matter candidates if they are produced by the late time decay of Q-ball, which
is generally formed in Affleck-Dine baryogenesis. The late time decays of the
Q-balls into these LSP's and subsequent pair annihilations of the LSP's
naturally lead to the desired mass density of dark matter. Furthermore, these
dark matter can be much more easily detected by the dark-matter search
experiments than the standard bino-like dark matter.


title: Affleck-Dine Leptogenesis and Low Scale Inflation

abstract:
  We study Affleck-Dine leptogenesis via the L H_u flat direction in
supersymmetric theories. We find that the baryon asymmetry is enhanced when the
energy scale of the inflation is sufficiently low. Especially, we consider
models of low scale inflation in which the Hubble parameter during inflation is
comparable to (but slightly larger than) the gravitino mass m_{3/2} \sim 1
\TeV. The observed cosmological baryon asymmetry is obtained with the lightest
neutrino mass m_{\nu_1} \sim 10^{-4} eV, if the reheating process is suddenly
terminated after inflation.


title:
The (Sigma_Q-Lambda_Q) transition magnetic moments in light cone QCD sum
  rules

abstract:
  Using the general form of (Sigma_Q) and (Lambda_Q) (Q=b or c) currents,
(Sigma_Q-Lambda_Q) transition magnetic moments are calculated in framework of
the light cone QCD sum rules method. In this approach nonperturbative effects
are described by the photon wave functions and only two-particle photon wave
functions are taken into account. Our predictions on transition magnetic
moments are (mu_{Sigma_c Lambda_c} = - (1.5 pm 0.4) mu_N) and (mu_{Sigma_b
Lambda_b} = - (1.6 pm 0.4) mu_N). A comparison of our results with the ones
existing in the literature is given.


title:
Femto-Photography of Protons to Nuclei with Deeply Virtual Compton
  Scattering

abstract:
  Developments in deeply virtual Compton scattering allow the direct
measurements of scattering amplitudes for exchange of a highly virtual photon
with fine spatial resolution. Real-space images of the target can be obtained
from this information. Spatial resolution is determined by the momentum
transfer rather than the wavelength of the detected photon. Quantum photographs
of the proton, nuclei, and other elementary particles with resolution on the
scale of a fraction of a femtometer is feasible with existing experimental
technology.


title: Parity and Time Reversal in J/Psi Decay

abstract:
  With the prospect of large numbers of $J/\Psi$ decay events becoming
available in the near future, it is interesting to search for symmetry
violating effects as probes of new physics and tests of the standard model.
$J/\Psi$ decay events could provide the first observation of weak effects in
otherwise strongly decaying particles. We calculate a T odd asymmetry in the
$J/\Psi$ decay into photon plus lepton pair due to Z boson exchange. Extensions
to hadronic final states are also discussed.


title: Thermal fluctuations in the interacting pion gas

abstract:
  We derive the two-particle fluctuation correlator in a thermal gas of
pi-mesons to the lowest order in an interaction due to a resonance exchange. A
diagrammatic technique is used. We discuss how this result can be applied to
event-by-event fluctuations in heavy-ion collisions, in particular, to search
for the critical point of QCD. As a practical example, we determine the shape
of the rapidity correlator.


title: Isospin Breaking in B -> K^* gamma Decays

abstract:
  A calculation of the leading isospin-breaking contributions to the B -> K^*
gamma decay amplitudes based on the QCD factorization approach is presented.
They arise at order Lambda/m_b in the heavy-quark expansion and are due to
annihilation contributions from 4-quark operators, the chromo-magnetic dipole
operator, and charm penguins. In the Standard Model the decay rate for B^0 ->
K^{*0} gamma is predicted to be about 10-20 % larger than that for B^- ->
K^{*-} gamma. Isospin-breaking effects are a sensitive probe of the penguin
sector of the effective weak Hamiltonian. New Physics models in which the
hierarchy of B -> K^* gamma decay rates is either flipped or greatly enhanced
could be ruled out with more precise data.


title: New interpretation to zitterbewegung

abstract:
  In previous investigations on zitterbewegung(zbw) of electron, it is believed
that the zbw results from some internal motion of electron. However, all the
analyses are made at relativistic quantum mechanical level. In framework of
quantum field theory (QFT), we find that the origin of zbw is different from
previous conclusion. Especially, some new interesting conclusions are derived
at this level: 1) the zbw arises from the rapid to-and-fro polarization of the
vacuum in the range of the Compton wavelength (divided by $4\pi$) of the
electron, which offer the four-dimensional(4D) spin and intrinsic
electromagnetic-moment tensor to the electron; 2) Any attempt that attributes
spin (rather than double the spin) of the electron to some kind of orbital
angular momentum would not be successful; 3) the macroscopic classical speed of
the Dirac vacuum medium vanish in all inertial systems.


title: Probing generalized parton distributions in pi N -> l+ l- N

abstract:
  We study the exclusive reactions pi- p -> l+ l- n and pi+ n -> l+ l- p$ in
view of possible future experiments with high-intensity pion beams. For large
invariant mass of the lepton pair l+ l- and small squared momentum transfer to
the nucleon these are hard-scattering processes providing access to generalized
parton distributions. We estimate the cross section for these reactions,
explore their connection with the pion form factor, and discuss the role they
can play in improving our understanding of the relevant reaction mechanisms.


title: Light Hadron Spectroscopy: Theory and Experiment

abstract:
  Rapporteur talk at the Lepton-Photon Conference, Rome, July 2001: reviewing
the evidence and strategies for understanding scalar mesons, glueballs and
hybrids, the gluonic Pomeron and the interplay of heavy flavours and light
hadron dynamics. Dedicated to the memory of Nathan Isgur, long-time
collaborator and friend, whose original ideas in hadron spectroscopy formed the
basis for much of the talk.


title:
Phase transition of color-superconductivity and cooling behavior of
  quark stars

abstract:
  We discuss the color-superconductivity and its effect on the cooling behavior
of strange quark stars. The neutrino emissivity and specific heat of quark
matter are calculated within the BCS theory. In the superconducting phase, the
emissivity decreases and causes suppression of the cooling rate. It is shown
that the phase transition leads to a sudden discontinuous suppression of the
cooling rate in cooperation with the specific heat.


title:
Nested Sums, Expansion of Transcendental Functions and Multi-Scale
  Multi-Loop Integrals

abstract:
  Expansion of higher transcendental functions in a small parameter are needed
in many areas of science. For certain classes of functions this can be achieved
by algebraic means. These algebraic tools are based on nested sums and can be
formulated as algorithms suitable for an implementation on a computer.
Examples, such as expansions of generalized hypergeometric functions or Appell
functions are discussed. As a further application, we give the general solution
of a two-loop integral, the so-called C-topology, in terms of multiple nested
sums. In addition, we discuss some important properties of nested sums, in
particular we show that they satisfy a Hopf algebra.


title: Degenerate BESS model at future colliders

abstract:
  A brief overview of the sensitivity of future colliders to new vector
particles from strongly interacting Higgs is presented. In particular the
capability of detecting almost degenerate resonances is reviewed.


title:
Prospects for probing the gluon density in protons using heavy
  quarkonium hadroproduction

abstract:
  We examine carefully bottomonia hadroproduction in proton colliders,
especially focusing on the LHC, as a way of probing the gluon density in
protons. To this end we develop some previous work, getting quantitative
predictions and concluding that our proposal can be useful to perform
consistency checks of the parameterization sets of different parton
distribution functions.


title:
Two-photon mediated resonance production in e+e- collisions: cross
  sections and density matrices

abstract:
  Earlier described model amplitudes are used in this paper to evaluate both
cross sections and density matrices for two-photon mediated resonance
production in e^+e^- collisions. All 25 q\bar{q} low-lying ^1S_0, ^3P_J and
^1D_2 resonances can thus be treated. Two independent methods are described to
obtain the resonance production density matrices and cross sections. These
density matrices combined with a resonance decay density matrix give the
detailed angular distributions of the resonance decay products. For two
particular decays, \chi_{c2},\chi_{c1}\to\gamma J/\psi the details are given.
Several numerical results are presented as well.


title:
Dispersion approach to quark-binding effects in weak decays of heavy
  mesons

abstract:
  Dispersion approach based on the constituent quark picture and its
applications to weak decays of heavy mesons are reviewed. Meson interaction
amplitudes are represented within this approach as relativistic spectral
integrals over the mass variables in terms of the meson wave functions and
spectral densities of the corresponding Feynman diagrams. Various applications
of this approach are discussed:
  Relativistic spectral representations for meson elastic and transition form
factors at spacelike momentum transfers are constructed. Form factors at
$q^2>0$ are obtained by the analytical continuation. As a result of this
procedure, form factors are given in the full $q^2$ range of the weak decay in
terms of the wave functions of the participating mesons.
  The 1/m_Q expansion of the obtained spectral representations for the form
factors for the particular limits of the heavy-to-heavy and heavy-to-light
transitions are analysed. Their full consistency with the constraints provided
by long-distance QCD for these limits is demonstrated. Predictions for form
factors for B, B(s), D, and D(s) decays to light mesons are given. The
B\to\gamma l\nu decay and the weak annihilation in rare radiative decays are
considered. Nonfactorizable corrections to the B^0-\bar B^0 mixing are
calculated. Inclusive weak B-decays are analysed and the differential
distributions are obtained in terms of the B-meson wave function.


title: Bose-Einstein Correlations in Z Fragmentation and Other Reactions

abstract:
  Recent experimental studies of Bose-Einstein Correlations in Z fragmentation
are reviewed in view of the need to understand their apparent suppression for
pions originating from different W's. Particular features discussed are source
elongation, position-momentum correlation, non-Gaussian shape of the
correlator, transverse-mass dependence, density dependence and dilution,
space-time shape of the emission function, neutral-pion and genuine
higher-order correlations.


title:
Indications on neutrino oscillations parameters from initial K2K and
  current SK data

abstract:
  We briefly discuss the impact of initial data from the KEK-to-Kamioka (K2K)
neutrino experiment on the nu_mu-->nu_tau oscillation parameters (m^2,tan^2
psi) currently indicated by the Super-Kamiokande (SK) atmospheric neutrino
experiment. After showing the very good agreement between K2K and SK, we
combine the two separate pieces of information. We find that the 99% C.L. range
for m^2 allowed by SK only, m^2=[1.3, 5.6]x10^-3 eV^2, is reduced to [1.5,
4.8]x10^-3 eV^2 by including K2K data. By halving the uncertainties of the K2K
total rate (with central value unchanged), the m^2 range would be ulteriorly
reduced to [1.8, 4.0]x10^-3 eV^2. Such information appears to be already useful
in planning (very) long baseline neutrino oscillation experiments.


title:
Formfactor of the relativistic scalar bound state calculated in
  Minkowski space

abstract:
  We have calculated the electromagnetic elastic form factor of a two body
scalar bound state. The Bethe-Salpeter equation is solved directly in the
Minkowski space using the Perturbation Theory Integral Representation. At soft
coupling regime the obtained results are compared with those following from a
quasipotential spectator (Gross) approximation.


title: Stability of strange quark matter: MIT bag versus Color Dielectric Model

abstract:
  We discuss the properties of strange matter, in particular the minimum of the
energy per baryon number as a function of the strangeness fraction. We utilize
both the MIT bag model and the Color Dielectric Model and compare the energy
per baryon with the masses of hyperons having the corresponding strangeness
fraction, which are coherently calculated within both models. We also take into
account the perturbative exchange of gluons. The results obtained in the two
approaches allow to discuss the stability of strangelets. While the MIT bag
model and the double minimum version of the Color Dielectric Model allow the
existence of strangelets, the single minimum version of the Color Dielectric
Model excludes this possibility.


title: TeV Strings and Ultrahigh-Energy Cosmic Rays

abstract:
  The origin and nature of ultrahigh-energy cosmic ray events, above the
Greisen-Zatsepin-Kuzmin (GZK) cutoff energy, constitute a long-standing,
unsolved mistery. Neutrinos are proposed candidates but their standard
interactions with matter are too weak. In the context of a TeV-scale string
theory, motivated by possible extra space dimensions, the neutrino-nucleon
scattering is examined. Resonant string contributions increase substantially
the standard model neutrino-nucleon cross section. Although they seem
insufficient to explain the trans-GZK cosmic ray events, their effects might be
detected in next experiments.


title: Aspects of QCD Factorization

abstract:
  The QCD factorization approach provides the theoretical basis for a
systematic analysis of nonleptonic decay amplitudes of B mesons in the
heavy-quark limit. After recalling the basic ideas underlying this formalism,
several tests of QCD factorization in the decays B -> D^(*) L, B -> K^* gamma,
and B -> pi K,pi pi are discussed. It is then illustrated how factorization can
be used to obtain new constraints on the parameters of the unitarity triangle.


title: High energy constraints on Lorentz symmetry violations

abstract:
  Lorentz violation at high energies might lead to non linear dispersion
relations for the fundamental particles. We analyze observational constraints
on these without assuming any a priori equality between the coefficients
determining the amount of Lorentz violation for different particle species. We
focus on constraints from three high energy processes involving photons and
electrons: photon decay, photo-production of electron-positron pairs, and
vacuum Cerenkov radiation. We find that cubic momentum terms in the dispersion
relations are strongly constrained.


title:
The impact of lepton-flavor violating Z' bosons on muon g-2 and other
  muon observables

abstract:
  A lepton-flavor violating (LFV) Z' boson may mimic some of the phenomena
usually attributed to supersymmetric theories. Using a conservative model of
LFV Z' bosons, the recent BNL E821 muon g-2 deviation allows for a LFV Z'
interpretation with a boson mass up to 4.8 TeV while staying within limits set
by muon conversion, mu -> e gamma, and mu -> eee. This model is immediately
testable as one to twenty e^+e^- -> mu tau events are predicted for an analysis
of the LEP II data. Future muon conversion experiments, MECO and PRIME, are
demonstrated to have potential to probe very high boson masses with very small
charges, such as a 10 TeV boson with an e-mu charge of 10^-5. Furthermore, the
next linear collider is shown to be highly complementary with muon conversion
experiments, which are shown to provide the strictest and most relevant bounds
on LFV phenomena.


title: Effects of Cosmological Moduli Fields on Cosmic Microwave Background

abstract:
  We discuss effects of cosmological moduli fields on the cosmic microwave
background (CMB). If a modulus field \phi once dominates the universe, the CMB
we observe today is from the decay of \phi and its anisotropy is affected by
the primordial fluctuation in the amplitude of the modulus field. Consequently,
constraints on the inflaton potential from the CMB anisotropy can be relaxed.
In particular, the scale of the inflation may be significantly lowered. In
addition, with the cosmological moduli fields, correlated mixture of adiabatic
and isocurvature fluctuations may be generated, which results in enhanced CMB
angular power spectrum at higher multipoles relative to that of lower ones.
Such an enhancement can be an evidence of the cosmological moduli fields, and
may be observed in future satellite experiments.


title: Polarized light-antiquark distributions in a meson-cloud model

abstract:
  Flavor asymmetry is investigated in polarized light-antiquark distributions
by a meson-cloud model. In particular, rho meson contributions to Delta u-bar -
Delta d-bar are calculated. We point out that the g_2 part of rho contributes
to the structure function g_1 of the proton in addition to the ordinary
longitudinally polarized distributions in rho. This kind of contribution
becomes important at medium x (>0.2) with small Q^2 (~1 GeV^2). Including
N->rho N and N->rho Delta splitting processes, we obtain the polarized rho
effects on the light-antiquark flavor asymmetry in the proton. The results show
Delta d-bar excess over Delta u-bar, which is very different from some
theoretical predictions. Our model could be tested by experiments in the near
future.


title:
CP Violation in Hyperon Decays from SUSY with Hermitian Yukawa and A
  Matrices

abstract:
  We show that a large CP asymmetry in hyperon decays can be naturally realized
in the framework of SUSY models. The possibility is implemented by the
hermiticities of Yukawa and A matrices. And also, the observed values of
$\epsilon$ and $\epsilon'$ are explained.


title:
Exact solutions of the equation for composite scalar particles in
  quantized electromagnetic waves

abstract:
  The equation is considered for a composite scalar particle with
polarizabilities in an external quantized electromagnetic plane wave. This
equation is reduced to a system of equations for infinite number of interacting
oscillators. After diagonalization, we come to equations for free oscillators.
As a result, exact solutions of the equation for a particle are found in a
plane quantized electromagnetic wave of the arbitrary polarization. As a
particular case, the solution for monochromatic electromagnetic waves is
considered. The relativistic coherent states of a particle are constructed in
the case of the Poisson distribution of photon numbers. In the limit when the
average photon number $<n>$ and the volume $V$ of the quantization trend to
infinity (but the photon density $<n>/V$ remains constant), the wavefunction
converts to the solution corresponding to the external classical
electromagnetic wave.


title:
Pair Production and Vacuum Polarization of Vector Particles with
  Electric Dipole Moments and Anomalous Magnetic Moments

abstract:
  The matrix, 8-component Dirac-like form of P-odd equations for boson fields
of spins 1 and 0 are obtained and the GL(2,c) symmetry group of equations is
derived. We found exact solutions of the field equation for vector particles
with arbitrary electric and magnetic moments in external constant and uniform
electromagnetic fields. The differential probability of pair production of
vector particles with the EDM and AMM by an external constant and uniform
electromagnetic field has been found using the exact solutions. We have
calculated the imaginary and real parts of the electromagnetic field Lagrangian
that takes into account the vacuum polarization of vector particles.


title:
Effective Actions, Radii and Electromagnetic Polarizabilities of Hadrons
  in QCD String Theory

abstract:
  A nonperturbative approach to QCD describing confinement and chiral symmetry
breaking is discussed. It is based on the path integral representation of
Green's function of quarks and leads to the QCD string theory. The effective
actions for mesons and baryons in the external uniform static electromagnetic
fields are obtained. The area law of the Wilson loop integral, the
approximation of the Nambu-Goto straight-line string, and the asymmetric
quark-diquark structure of nucleons are used to simplify the problem. The
spin-orbit and spin-spin interactions of quarks are treated as a perturbation.
Using the virial theorem we estimate the mean radii of hadrons in terms of the
string tension and the Airy function zeros. On the basis of the perturbation
theory in small external electromagnetic fields we derive the electromagnetic
polarizabilities of nucleons. The electric and diamagnetic polarizabilities of
a proton are $\bar{\alpha}_p= 10\times 10^{-4} fm^3$, $\beta_p^{dia}=-8\times
10^{-4} fm^3$ and for a neutron we find $\bar{\alpha}_n=4.2\times 10^{-4} fm^3
$, $\beta_n^{dia}= -5.4\times 10^{-4} fm^3$. Using the $\Delta$ contribution to
the paramagnetic polarizability of the nucleons, reasonable values of the
magnetic polarizabilities $\bar{\beta}_p=(5\pm 3)\times 10^{-4} fm^3$,
$\bar{\beta}_n=(7.6\pm 3)\times 10^{-4} fm^3$ are estimated.


title: A Constrained Standard Model: Effects of Fayet-Iliopoulos Terms

abstract:
  In hep-ph/0011311 the one Higgs doublet standard model was obtained by an
orbifold projection of a 5D supersymmetric theory in an essentially unique way,
resulting in a prediction for the Higgs mass m_H = 127 \pm 8 GeV and for the
compactification scale 1/R = 370 \pm 70 GeV. The dominant one loop contribution
to the Higgs potential was found to be finite, while the above uncertainties
arose from quadratically divergent brane Z factors and from other higher loop
contributions. In hep-th/0108184, a quadratically divergent Fayet-Iliopoulos
term was found at one loop in this theory. We show that the resulting
uncertainties in the predictions for the Higgs boson mass and the
compactification scale are small, about 25% of the uncertainties quoted above,
and hence do not affect the original predictions. However, a tree level brane
Fayet-Iliopoulos term could, if large enough, modify these predictions,
especially for 1/R.


title: Thermal and Quantum Fluctuations around Domain Walls

abstract:
  We compute thermal and quantum fluctuations in the background of a domain
wall in a scalar field theory at finite temperature using the exact scalar
propagator in the subspace orthogonal to the wall's translational mode. The
propagator makes it possible to calculate terms of any order in the
semiclassical expansion of the partition function of the system. The leading
term in the expansion corresponds to the fluctuation determinant, which we
compute for arbitrary temperature in space dimensions 1,2, and 3. Our results
may be applied to the description of thermal scalar propagation in the presence
of soliton defects (in polymers, magnetic materials, etc.) and interfaces which
are characterized by kinklike profiles. They lead to predictions as to how
classical free energies, surface tensions, and interface profiles are modified
by fluctuations, allowing for comparison with both numerical and experimental
data. They can also be used to estimate transition temperatures. Furthermore,
the simple analytic form of the propagator may simplify existing calculations,
and allow for more direct comparisons with data from scattering experiments.


title: Semi-classical transport theory for non-Abelian plasmas

abstract:
  We review a semi-classical transport theory for non-Abelian plasmas based on
a classical picture of coloured point particles. Within this formalism, kinetic
equations for the mean particle distribution, the mean fields and their
fluctuations are obtained using an ensemble-average in phase space. The
framework permits the integrating-out of fluctuations in a systematic manner.
This leads to the derivation of collision integrals, noise sources and
fluctuation-induced currents for the effective transport equations of QCD.
Consistency with the non-Abelian gauge symmetry is established, and systematic
approximation schemes are worked out. In particular, the approach is applicable
to both in- and out-of-equilibrium plasmas. The formalism is applied explicitly
to a hot and weakly coupled QCD plasma slightly out of equilibrium. The physics
related to Debye screening, Landau damping or colour conductivity is deduced in
a very simple manner. Effective transport equations are computed to first and
second order in moments of the fluctuations. To first order, they reproduce the
seminal hard-thermal-loop effective theory. To second order, the fluctuations
induce collisions amongst the quasi-particles, leading to a Langevin-type
transport equation. A complementary Langevin approach is discussed as well.
Finally, we show how the approach can be applied to dense quark matter systems.
In the normal phase, the corresponding kinetic equations lead to the
hard-dense-loop effective theory. At high density and low temperature diquark
condensates are formed, changing the ground state of QCD. In the
superconducting phase with two massless quark flavours, a transport equation
for coloured excitations is given as well. Possible future applications are
outlined.


title:
Earth effects on supernova neutrinos and their implications for neutrino
  parameters

abstract:
  We perform a detailed study of the Earth matter effects on supernova
neutrinos with neutrino oscillation parameter LMA and small $\theta_{13}$. The
Earth effects show significant dependences on the neutrino path length inside
the Earth and the value of $\Delta m^{2}_{12}$. We investigate rather
optimistically a possibility that we can probe the value of $\Delta m^{2}_{12}$
by the Earth effects. We assume that $\theta_{12}$ and the direction of the
supernova are known with enough accuracy and that the resonance that occurs at
higher density in supernova envelope is completely nonadiabatic. Further the
neutrino spectra before neutrinos go through the Earth are assumed to be known.
Then we show that making use of these dependences, we can obtain implication
for the value of $\Delta m^{2}_{12}$ by comparing the observed energy spectrum
to the predicted one. When SK detects neutrinos from supernova at 10kpc which
traveled through the Earth (nadir angle $<$ 80 degree), $\Delta m^{2}_{12}$ can
be determined with an accuracy of $\sim 10%$. In much of the
neutrino-detection-time-$\Delta m^{2}_{12}$ plane, $\Delta m^{2}_{12}$ might be
determined with an accuracy equal to or better than $\pm 0.5 \times 10^{-5}
{\rm eV}^{2}$.


title: One-Loop Analysis of FCNC Induced by Right-handed Down Squark Mixings

abstract:
  If the underlying flavor symmetry is Abelian, quark mixings in $d_R$ sector
are the most prominent. Such flavor violating effects can reveal itself through
$\tilde d_R$ squark mixings if supersymmetry is realized in Nature.
Quark-squark alignment is necessary to deal with $\Delta m_K$ and $\epsilon_K$
constraints, but interestingly, with $m_{\tilde q}$, $m_{\tilde g} \sim$ TeV,
the $\tilde d_R$ mixing effects are comparable to $B_d$ and $B_s$ mixings in
the Standard Model, while $D^0$ mixing is tantalizingly close to some hints
from data. CP phases in these mixings would therefore be deviant, and $|
V_{td}|$ and $\arg V_{ub}^*$ may be larger than allowed by unitarity
constraints, which can be checked by the BaBar and Belle experiments. Mixing
induced CP violation in $b\to s\gamma$ and $d\gamma$ transitions can be
obtained, in particular, by sizable enhancement with an extra $\tan\beta$
factor from non-standard soft breaking terms. Heavy superparticles can escape
present flavor changing neutral current (FCNC) bounds and direct searches at
colliders, but reveal themselves in the B system.


title: Effective description of QCD at high density

abstract:
  After an introduction to the phases of QCD at high density and zero
temperature, we introduce the effective lagrangian for the CFL phase and
discuss the perturbative evaluation of its parameters


title: Spin Correlations in Monte Carlo Simulations

abstract:
  We show that the algorithm originally proposed by Collins and Knowles for
spin correlations in the QCD parton shower can be used in order to include spin
correlations between the production and decay of heavy particles in Monte Carlo
event generators. This allows correlations to be included while maintaining the
step-by-step approach of the Monte Carlo event generation process.
  We present examples of this approach for both the Standard and Minimal
Supersymmetric Standard Models. A merger of this algorithm and that used in the
parton shower is discussed in order to include all correlations in the
perturbative phase of event generation. Finally we present all the results
needed to implement this algorithm for the Standard and Minimal Supersymmetric
Standard Models.


title:
Instanton-Like Processes in Particle Collisions: a Numerical Study of
  the SU(2)-Higgs Theory below the Sphaleron Energy

abstract:
  We use semiclassical methods to calculate the probability of inducing a
change of topology via a high-energy collision in the SU(2)-Higgs theory. This
probability is determined by a complex solution to a classical boundary value
problem on a contour in the complex time plane. In the case of small particle
number it is the probability of instanton-like processes in particle
collisions. We obtain numerically configurations with the correct topological
features and expected properties in the complex time plane. Our work
demonstrates the feasibility of the numerical approach to the calculation of
instanton-like processes in gauge theories. We present our preliminary results
for the suppression factor of topology changing processes, which cover a wide
range of incoming particle numbers and energies below the sphaleron energy.


title:
Note on finite temperature sum rules for vector and axial-vector
  spectral functions

abstract:
  An updated analysis of vector and axial-vector spectral functions is
presented. The resonant contributions to the spectral integrals are shown to be
expressible as multiples of 4 pi^2 f_pi^2, encoding the scale of spontaneous
chiral symmetry breaking in QCD. Up to order T^2 this behavior carries over to
the case of finite temperature.


title: Light-cone representation of the quark Schwinger-Dyson equation

abstract:
  We use a light-cone approach to solve the Schwinger-Dyson equation for the
quark propagator. We show how this method can be used to solve the equation
beyond the space-like region, to which one is usually restricted with the usual
Euclidean-space approach. We work in the Landau gauge, and use an
infrared-enhanced model for the gluon propagator and include instanton effects
to get both confinement and vacuum condensates. With our models, reasonable
fits to known quantities are obtained, resulting in a light-cone quark
propagator that can be used for hadronic physics at all momentum transfers.


title: Effective chiral theory of large N_C QCD of mesons

abstract:
  En effective chiral theory of large N_C QCD of pseudoscalar, vector, and
axial-vector mesons is reviewed.


title: Monte-Carlo Event Generators at NLO

abstract:
  A method to construct Monte-Carlo event generators at arbitrarily non-leading
order is explained for the case of a non-gauge theory. A precise and correct
treatment of parton kinematics is provided. Modifications of the conventional
formalism are required: parton showering is not exactly the same as DGLAP
evolution, and the external line prescription for the hard scattering differs
from the LSZ prescription. The prospects for extending the results to QCD are
discussed.


title: Electroweak-correction effects in gauge-boson pair production at the LHC

abstract:
  We have studied the effect of one-loop logarithmic electroweak radiative
corrections on WZ and $W\gamma$ production processes at the LHC. We present
analytical results for the leading-logarithmic electroweak corrections to the
corresponding partonic processes du -> WZ, Wgamma. Using the leading-pole
approximation we implement these corrections into Monte Carlo programs for
$pp\to l\nu_l l'\bar l', l\nu_l\gamma$. We find that electroweak corrections
lower the predictions by 5-20% in the physically interesting region of large
transverse momentum and small rapidity separation of the gauge bosons.


title: Improved Analysis of B->pi e nu from QCD Sum Rules on the Light-Cone

abstract:
  We present a new calculation of the B->pi form-factor f_+, relevant for the
measurement of |V_{ub}| from semileptonic B->pi transitions, from QCD sum rules
on the light-cone. The new element is the calculation of radiative corrections
to next-to-leading twist-3 accuracy.
  We find that these contributions are factorizable at O(alpha_s), which lends
additional support to the method of QCD sum rules on the light-cone. We obtain
f_+(0) = 0.26\pm 0.06 \pm 0.05, where the first error accounts for the
uncertainty in the input-parameters and the second is a guesstimate of the
systematic uncertainty induced by the approximations inherent in the method. We
also obtain a simple parametrization of the form-factor which is valid in the
entire kinematical range of semileptonic decays and consistent with
vector-meson dominance at large momentum-transfer.


title:
Dalitz plot slope parameters for $K \to \pi\pi\pi$ decays and two
  particle interference

abstract:
  We study the possible distortion of phase-space in the decays $K \to \pi \pi
\pi$, which may result from final state interference among the decay products.
Such distortion may influence the values of slope parameters extracted from the
Dalitz plot distribution of these decays. We comment on the consequences on the
magnitude of violation of the $\mid \Delta I \mid = 1/2$ rule in these decays.


title: 4D construction of bulk supersymmetry breaking

abstract:
  In this letter, we discuss a four-dimensional model with modulus fields which
are responsible for supersymmetry breaking. Given non-trivial moduli dependence
of the action, the model is found to give a proper description of
higher-dimensional supersymmetry breaking. We explicitly calculate gaugino and
scalar mass spectrum and show that several classes of scenarios proposed in the
literature are described in certain regions of the parameter space of the
moduli vacuum expectation values. The model in other generic regions of the
moduli space gives unexplored scenarios (mass spectra) of supersymmetry
breaking in four dimensions.


title:
Stability of strange quark matter in the MIT bag model and in the Color
  Dielectric Model

abstract:
  We utilize the MIT bag model and two different versions of the Color
Dielectric Model in order to study the properties of strange matter, and to
discuss the stability of strangelets. We also investigate the effect of the
introduction of perturbative gluons. The MIT bag model and the Double Minimum
version of the Color Dielectric Model allow the existence of strangelets, while
the Single Minimum version excludes this possibility.


title: A Phenomenological Study on Lepton Mass Matrix Textures

abstract:
  The three active light neutrinos are used to explain the neutrino
oscillations. The inherently bi-large mixing neutrino mass matrix and the
Fritzsch type, bi-small mixing charged lepton mass matrix are assumed. By
requiring the maximal \nu_\mu-\nu_\tau mixing for the atmospheric neutrino
problem and the mass-squared difference approperiate for the almost maximal
mixing solution to the solar neutrino problem, the following quantities are
predicted: the \nu_e-\nu_\mu mixing, V_{e3}, CP violation in neutrino
oscillations, and the effective electron-neutrino mass relevant to neutrinoless
double beta decays.


title:
Deep Inelastic Scattering with Tagged Initial State Radiation: Complete
  O(alpha) leptonic QED Corrections

abstract:
  In this paper we extend the calculation of the QED corrections to deep
inelastic lepton-proton scattering with a tagged photon, taking into account
the full corrections on the lepton side. Comparing to previous results that
were obtained by considering only large logarithmic terms at leading and
next-to-leading accuray, we find that the difference is in general quite small,
however, it may be significant in the region of large $y$ and small $x$.


title: Scalar flavour-changing neutral currents in the large-tan(beta) limit

abstract:
  We analyse scalar flavour-changing neutral currents of down-type quarks in
models with two Higgs doublets, coupled separately to up- and down-type quarks,
in the limit where the ratio of the two expectation values ($\tan \beta =
v_u/v_d$) is large. We clarify the origin of this phenomenon, both in $\Delta
F=1$ and $\Delta F=2$ processes, analysing differences and analogies between
supersymmetric and non-supersymmetric models. We confirm previous findings of a
sizeable enhancement at large $\tan\beta$ of specific $\Delta F=1$ and $\Delta
F=2$ amplitudes in the MSSM and, in these cases, we discuss how
large-$\tan\beta$ corrections can be controlled beyond lowest order. Finally,
we emphasize the unique role of the rare processes $B_{s,d} \to \tau^+ \tau^-$
and $B_{s,d} \to \mu^+ \mu^-$ in probing this scenario.


title: The Enigma of the Dark Matter

abstract:
  One of the great scientific enigmas still unsolved, the existence of dark
matter, is reviewed. Simple gravitational arguments imply that most of the mass
in the Universe, at least 90%, is some (unknown) non-luminous matter. Some
particle candidates for dark matter are discussed with particular emphasis on
the neutralino, a particle predicted by the supersymmetric extension of the
Standard Model of particle physics. Experiments searching for these relic
particles, carried out by many groups around the world, are also discussed.
These experiments are becoming more sensitive every year and in fact one of the
collaborations claims that the first direct evidence for dark matter has
already been observed.


title: Error Estimates on Parton Density Distributions

abstract:
  Error estimates on parton density distributions are presently based on the
traditional method of least squares minimisation and linear error propagation
in global QCD fits. We review the underlying assumptions and the various
mathematical representations of the method and address some technical issues
encountered in such a global analysis. Parton distribution sets which contain
error information are described.


title: Theoretical progress in describing the B-meson lifetimes

abstract:
  The present status of the theoretical estimates of the difference between the
widths of the neutral Bs-mesons and of the B-meson lifetime ratios is reviewed.
In particular, the lattice results for the matrix elements of the relevant
(delta B=2)-operators are updated and the first lattice QCD results for the
matrix elements of (delta B=0)-operators are presented. In both cases, the NLO
perturbative QCD corrections in the coefficient functions have been included.
The theoretically updated results are: (delta Gamma/Gamma)_{Bs} = (7 +/- 4) %,
tau(B+)/tau(Bd) = 1.07(3) and tau(Bs)/tau(Bd) = 1.00(2).


title:
A Non-SUSY Model for Neutrino Oscillation, Baryogenesis and Neutrinoless
  Double Beta Decay

abstract:
  We fitted the neutrino oscillations, baryogenesis and neutrinoless double
beta decay using Anti-GUT model.


title: New Tools for Fermion Masses from Extra Dimensions

abstract:
  We present models in which the observed fermion masses and mixings are
generated by dynamically localizing the three generations of matter in a flat
compact extra dimension. We first construct models assuming the hierarchy
problem is addressed by the existence of large extra dimensions, i.e. the
fundamental scale is not far above a TeV and supersymmetry is not imposed.
These models are compactified, chiral, and don't require fine-tuning to
generate the top mass. Limits on the compactification scale based on
flavor-changing neutral currents are relaxed compared to those on existing
models. We then supersymmetrize some of these models. Using N=1 superspace
language in extra dimensions, we find space-dependent flat directions which can
be used to localize fields. Finally, we discuss methods of breaking
supersymmetry and the impact of these models on the superpartner spectrum.


title:
Black hole production in TeV-scale gravity, and the future of high
  energy physics

abstract:
  If the Planck scale is near a TeV, black hole production should be possible
at colliders, as well as by cosmic rays. I begin with a review of the two
approaches to TeV-scale gravity, large extra dimensions and warped
compactification, presented in a unified framework. Then properties of such
black holes and estimates of their production rates are given, and consequences
for the future of high-energy experimental physics are discussed.


title:
Soliton Models for the Nucleon and Predictions for the Nucleon Spin
  Structure

abstract:
  In these lectures the three flavor soliton approach for baryons is reviewed.
Effects of flavor symmetry breaking in the baryon wave--functions on axial
current matrix elements are discussed. A bosonized chiral quark model is
considered to outline the computation of spin dependent nucleon structure
functions in the soliton picture.


title: Precision Electroweak Data: Phenomenological Analysis

abstract:
  The precision electroweak program, including weak neutral current (WNC),
$Z$-pole, and high energy collider experiments, has been the primary prediction
and test of electroweak unification. It has established that the standard model
(SM) is correct and unique to first approximation, establishing the gauge
principle as well as the SM gauge group and representations; shown that the SM
is correct at loop level, confirming the basic principles of renormalizable
gauge theory and allowing the successful prediction or constraint on $m_t$,
$\alpha_s$, and $M_H$; severely constrained new physics at the TeV scale, with
the ideas of unification strongly favored over TeV-scale compositeness; and
yielded precise values for the gauge couplings, consistent with
(supersymmetric) gauge unification.


title: The QCD Phase Diagram, Equation of State, and Heavy Ion Collisions

abstract:
  After some historic remarks and a brief summary of recent theoretical news
about the QCD phases, we turn to the issue of $freeze-out$ in heavy ion
collisions. We argue that the chemical freeze-out line should actually consists
of two crossing lines of different nature. We also consider some inelatic
reactions which occure $after$ chemical freeze-out, emphasizing the role of
overpopulation of pions. The $hydrodynamics$ (with or without hadronic
afterburner) explaines SPS/RHIC data on radial and elliptic flow in unexpected
details,for different particles, collision energies, and impact parameters.
  Apart of Equation of State (EoS), it has basically no free parameters. The
EoS which describe these data best agrees quite well with the lattice
predictions, with the QGP latent heat $\Delta\epsilon\approx 800 Mev/fm^3$.
Other phenomena at RHIC, such as ``jet quenching'' and huge ellipticity at
large $p_t$, also point toward very rapid entropy production. Its mechanism
remains an outstanding open problem: at the end we discuss recent application
of the instanton/sphaleron mechanism. The gg collisions with $\sqrt{s}=2-3 GeV$
may result not in mini-jets but rather in production of sphaleron-like
gluomagnetic clusters, which are classically unstable and promptly decay into
several gluons and quarks, in sperical mini-Bangs.


title:
A Monte Carlo Study of Erraticity Behavior in Nucleus-Nucleus Collisions
  at High Energies

abstract:
  It is demonstrated using Monte Carlo simulation that in different
nucleus$-$nucleus collision samples, the increase of the fluctuation of event
factorial moments with decreasing phase space scale, called erraticity, is
still dominated by the statistical fluctuations. This result does not depend on
the Monte Carlo models. Nor does it depend on the concrete conditions, e.g. the
collision energy, the mass of colliding nuclei, the cut of phase space, etc..
This means that the erraticity method is sensitive to the appearance of novel
physics in the central collisions of heavy nuclei.


title: Effect of massive fields on inflation

abstract:
  Effects caused by an additional massive scalar field interacting with an
inflaton field are analyzed. Inflation is shown to have two stages, the first
of which is dominant and characterized by ultraslow dynamics of the inflaton
field. Constraints on the model parameters are obtained.


title: The D^0 -> K^0 \bar{K^0} decay beyond factorization

abstract:
  The decay mode D^0 -> K^0 \bar{K^0} has no factorizable contribution. We
calculate the nonfactorizable chiral loop contributions of order O(p^3)and then
we use a heavy-light type chiral quark model to calculate nonfactorizable tree
level terms, also of order O(p^3), proportional to the gluon condensate.
Calculated chiral loops and the gluon condensate contributions are of the same
order of magnitude as the experimental amplitude.


title:
Effective Lagrangians Induced by the Anomalous Wess-Zumino Action and
  $I^G(J^{PC})=1^-(1^{-+})$ Exotic States

abstract:
  A simple dynamical model for the exotic waves with $I^G(J^{PC})=1^-(1^{-+})$
in the reactions $\rho\pi\to\rho\pi$, $\rho\pi\to\eta\pi$,
$\rho\pi\to\eta'\pi$, $ \rho\pi\to(K^*\bar K+\bar K^*K)$, and in the related
ones, is constructed beyond the scope of the quark-gluon approach. The model
satisfies unitarity and analyticity and uses as a "priming" the anomalous
non-diagonal $VPPP$ interaction which couples together the four channels
$\rho\pi$, $\eta\pi$, $ \eta'\pi$, and $K^*\bar K+\bar K^*K$. The possibility
of the resonance-like behavior of the $I^G(J^{PC})=1^-(1^{-+})$ amplitudes
belonging to the $\{10\}- \{\bar{10}\}$ and $\{8\}$ representations of SU(3) as
well as their mixing is demonstrated explicitly in the 1.3--1.6 GeV mass range
which, according to the current experiments, is really rich in exotics.


title: SU(3) Symmetry Breaking and Polarized Parton Densities

abstract:
  We analyze the semileptonic weak decays of the octet baryons in a "model
independent" approach, based on the algebraic structure of the Chiral
Quark-Soliton Model. We argue that this analysis is in fact more general than
the model itself. While the symmetry breaking for the semileptonic decays
themselves is not strong, other quantities like $\Delta s$ and $\Delta \Sigma$
are much more affected. We calculate $\Delta \Sigma$ and $\Delta q$ for all
octet baryons. Unfortunately, large experimental errors of $\Xi^-$ decays
propagate in our analysis, in particular, in the case of $\Delta\Sigma $ and
$\Delta s$. Only if the errors for these decays are reduced, the accurate
theoretical predictions for $\Delta\Sigma$ and $\Delta s$ will be possible.


title: Hubble-induced radiative corrections and Affleck-Dine Baryogenesis

abstract:
  We examine the viability of the Affleck-Dine mechanism for baryogenesis under
radiatively induced running of soft breaking $({\rm mass})^2$ of the flat
directions stemming from non-zero energy density of the inflaton during
inflation. A major difference from analogous phenomenological studies is that
the horizon radius provides a natural infrared cut-off to the quantum
corrections in this case. We identify different scenarios which may arise and
point out that the $H_{u}L$ flat direction remains the most promising flat
direction, since it is largely independent of uncertainties about high scale
physics and details of the inflationary model.


title: Searching for L-Violating Supersymmetry at the LHC

abstract:
  The possibility to simulate lepton number violating supersymmetric models has
been introduced into the recently updated PYTHIA event generator, now
containing 1278 decay channels of SUSY particles into SM particles via lepton
number violating interactions. This generator has been used in combination with
the ATLFAST detector simulation to study the impact of lepton number violation
(LV) on event topologies in the ATLAS detector, and trigger menus designed for
LV-SUSY are proposed based on very general considerations. In addition, a
rather preliminary analysis is presented on the possibility for ATLAS to
observe a signal above the background in several mSUGRA scenarios, using a
combination of primitive cuts and neural networks to optimize the
discriminating power between signal and background events over regions of
parameter space rather than at individual points. It is found that a 5 sigma
discovery is possible roughly for m_{1/2} < 1TeV and m_0 < 2TeV with an
integrated luminosity of 30fb^{-1}, corresponding to one year of data taking
with the LHC running at ``mid-luminosity'', L = 3*10^{33}s^{-1}cm^{-2}.


title:
Observability of the Lightest MSSM Higgs Boson with Explicit CP
  Violation via Gluon Fusion at the LHC

abstract:
  We investigate the observability of the lightest Higgs boson in the
gluon-fusion channel at the CERN Large Hadron Collider (LHC) in the minimal
supersymmetric Standard Model with explicit CP-violating mixing among three
neutral Higgs bosons. The lightest Higgs boson with its mass less than 130 GeV
can be detected at the LHC via its gluon-fusion production followed by the
decay into two photons. The explicit CP violation can suppress both the
production cross section and the two-photon decay branching fraction so
significantly that the signal cross section may be more than ten times smaller
than the SM signal. This reduction factor can be as small as 1/40 if the
lightest Higgs boson mass is 115 GeV and its production cross section at LEP2
is more than 90 % that of the SM case.


title: The charm quark's mass in quenched QCD

abstract:
  We present our preliminary result for the charmed quark mass, which follows
from taking the D_s and K meson masses from experiment and r0=0.5 fm (or,
equivalently F_K=160 MeV) to set the scale. For the renormalization group
invariant quark mass we obtain M_c = 1684(64) MeV, which translates to
m_c(m_c)= 1314 (40)(20)(7) MeV for the running mass in the MSbar scheme.
Renormalization is treated non-perturbatively, and the continuum limit has been
taken, so that the only uncontrolled systematic error consists in the use of
the quenched approximation.


title:
Study of two-photon production process in proton-proton collisions at
  216 MeV

abstract:
  The energy spectrum for high energy $\gamma$-rays ($E_\gamma \geq 10$ MeV)
from the process $pp \to \gamma \gamma X$ emitted at $90^0$ in the laboratory
frame has been measured at 216 MeV. The resulting photon energy spectrum
extracted from $\gamma-\gamma$ coincidence events consists of a narrow peak
(5.3$\sigma$) at a photon energy of about 24 MeV and a relatively broad peak
(3.5$\sigma$) in the energy range of (50 - 70) MeV. This behavior of the photon
energy spectrum is interpreted as a signature of the exotic dibaryon resonance
$d^\star_1$ with a mass of about 1956 MeV which is assumed to be formed in the
radiative process $pp \to \gamma d^\star_1$ followed by its electromagnetic
decay via the $d^\star_1 \to pp \gamma$ mode. The experimental spectrum is
compared with those obtained by means of Monte Carlo simulations.


title: Hints on the power corrections from current correlators in x-space

abstract:
  We consider an interpretation of the recent lattice data on the
current-current correlators in the x-space. The data indicate rather striking
difference between (axial)vector and (pseudo)scalar channels which goes beyond
the predictions of the standard non-perturbative models. We argue that if the
difference is to be explained by power corrections, there is a unique choice of
the form of the correction. We discuss the emerging picture of the power
corrections.

categories: hep-ph cond-mat hep-ex hep-lat hep-th nucl-th


title: Large Mixing Induced by the Strong Coupling with a Single Bulk Neutrinos

abstract:
  Neutrino is a good probe of extra dimensions. Large mixing and the apparent
lack of very complicated oscillation patterns may be an indication of large
couplings between the brane and a single bulk neutrino. A simple and realistic
five-dimensional model of this kind is discussed. It requires a sterile in
addition to three active neutrinos on the brane, all coupled strongly to one
common bulk neutrino, but not directly among themselves. Mindful that sterile
neutrinos are disfavored in the atmospheric and solar data, we demand induced
mixing to occur among the active neutrinos, but not between the active and the
sterile. The size $R$ of the extra dimension is arbitrary in this model,
otherwise it contains six parameters which can be used to fit the three
neutrino masses and the three mixing angles. However, in the model those six
parameters must be suitably ordered, so a successful fit is not guaranteed. It
turns out that not only the data can be fitted, but as a result of the
ordering, a natural connection between the smallness of the reactor angle
$\theta_{13}$ and the smallness of the mass-gap ratio $\Delta
M^2_{solar}/\Delta M^2_{atmospheric}$ can be derived.


title:
A Simple Model for the BFKL-DGLAP Transition in Deep Inelastic
  Scattering

abstract:
  A simple model is presented, which interpolates between the DGLAP and BFKL
regimes in deep inelastic e-p scattering. The model is based on the CCFM and
LDC models, and it is simple enough to provide an intuitive picture of the
transition region between the two domains. Results are presented for both fixed
and running coupling; for fixed coupling the transition between the domains
occurs at a constant ratio between ln((k_T)^2) and ln(1/x), while for a running
coupling it occurs for constant ratio between ln(ln((k_T)^2)) and ln(1/x).


title:
Renormalization of the Fayet-Iliopoulos Term in Softly Broken SUSY Gauge
  Theories

abstract:
  It is shown that renormalization of the Fayet-Iliopoulos term in a softly
broken SUSY gauge theory, in full analogy with all the other soft terms
renormalizations, is completely defined in a rigid or an unbroken theory.
However, contrary to the other soft renormalizations, there is no simple
differential operator that acts on the renormalization functions of a rigid
theory and allows one to get the renormalization of the F-I term. One needs an
analysis of the superfield diagrams and some additional diagram calculations in
components. The method is illustrated by the four loop calculation of some part
of renormalization proportional to the soft scalar masses and the soft triple
couplings.


title: High order corrections for top quark and jet production at the Tevatron

abstract:
  An overview of the theoretical status of the top quark and single-jet
inclusive production cross sections at the Tevatron is presented. NLO results
as well as NNLO-NNLL and higher order threshold expressions derived from
resummation calculations are discussed. Numerical results are presented for top
quark production at the Tevatron, and it is shown that higher orders contribute
sizable corrections to the total cross section and differential distributions,
and they also dramatically reduce the factorization scale dependence of the
cross section. For jet production, the scale dependence is also reduced but the
NNLO threshold corrections are not very big.


title:
Gauged $L_\mu - L_\tau$ with Large Muon Anomalous Magnetic Moment and
  the Bimaximal Mixing of Neutrinos

abstract:
  We consider the gauging of $L_\mu - L_\tau$ as an explanation of a possibly
large muon anomalous magnetic moment. We then show how neutrino masses with
bimaximal mixing may be obtained in this framework. We study the novel
phenomenology of the associated gauge boson in the context of present and
future high-energy collider experiments.


title:
Rare decay $B\to X_sl^+l^-$ in a CP spontaneously broken two Higgs
  doublet model

abstract:
  The Higgs boson mass spectrum and couplings of neutral Higgs bosons to
fermions are worked out i n a CP spontaneously broken two Higgs doublet model
in the large tan$\beta$ case.
  The differential branching ratio, forward-backward asymmetry, CP asymmetry
and lepton polarization for $B\to X_s l^+ l^-$ are computed. It is shown that
effects of neutral Higgs bosons are quite significant when $\tan\beta$ is
large. Especially, the CP violating normal polarization $P_N$ can be as large
as several percents.


title: Noncommutative QED and $\gamma\gamma$ scattering

abstract:
  We study $\gamma\gamma$ scattering in noncommutative QED (NCQED) where the
gauge field has Yang-Mills type coupling, giving new contributions to the
scattering process and making it possible for it to occur at tree level. The
process takes place at one loop level in the Standard Model (SM) and could be
an important signal for physics beyond SM. But it is found that the Standard
Model contribution far exceeds the tree level contribution of the
noncommutative case.


title:
Pomeron effective intercept, logarithmic derivatives of $F_{2}(x,Q^{2})$
  in DIS and Regge models

abstract:
  The drastic rise of the proton structure function $F_2(x,Q^2)$ when the
Bj\"orken variable $x$ decreases, seen at HERA for a large span of $Q^2$, may
be damped when $x\to 0$ and $Q^2$ increases beyond $\sim$ several hundreds \g2.
This phenomenon observed in the Regge type models is discussed in terms of the
effective Pomeron intercept and of the derivative $B_x=\partial{\ell n
F_2(x,Q^2)}/\partial{\ell n(1/x)}$. The method of the overlapping bins is used
to extract the derivatives $B_x$ and $B_Q=\partial{\ell n
F_2(x,Q^2)}/\partial{Q^2}$ from the data on $F_2$ for $6.0\cdot 10^{-5}\le x\le
0.61$ and $1.2 \le Q^2$ (\g2) $\le 5000$. It is shown that the extracted
derivatives are well described by recent Regge models with the Pomeron
intercept equal one.


title: Color superconducting quark matter in compact stars

abstract:
  When nuclear matter reaches a high enough density, we expect that the
nucleons will overlap so much as to lose their separate identities, and merge
into quark matter. In this talk I will review some theoretical expectations and
speculations about quark matter, focusing on the phenomenon of quark pair
condensation (color superconductivity) and its application to compact stars.


title:
Triviality and Vacuum Stability Bounds on the Higgs Boson Mass beyond
  the Standard Model

abstract:
  The triviality and vacuum stability bounds on the Higgs-boson mass were
revisited in presence of weakly-coupled new interactions parameterized in a
model-independent way by effective operators of dimension 6. It was shown that
for the scale of new physics in the region Lambda=.5-50 TeV the Standard Model
triviality upper bound remains unmodified whereas it is natural to expect that
the lower bound derived from the requirement of vacuum stability is increased
by 40-60 GeV depending on the scale Lambda and strength of coefficients of
effective operators. It turns out that if the Higgs-boson mass is close to its
lower LEP limit then the upper bound on the scale of new physics that follows
from the vacuum stability requirement would be decreased dramatically even for
modest values of coefficients of effective operators implying new physics
already at the scale of a few TeV.


title:
A New Scaling for Single-Spin Asymmetry in Meson and Baryon
  Hadroproduction

abstract:
  Experimental data on analyzing power for inclusive meson and baryon
production in hadron-proton(polarized) collisions have been analyzed. It is
found that the existing data can be described by a simple function of collision
energy, transverse momentum (Pt) and a new scaling variable Xa = E/Ebeam. At
beam energies above 40 GeV and Pt above 1 GeV/c the analyzing power is
described by a function of Xa and Pt only (AN = F(Pt)G(Xa)) for both polarized
proton fragmentation and central regions of proton-hadron collision. Comparison
of data from Fermilab and new IHEP data measured using 40 GeV/c polarized
proton beam was most decisive for the revelation of the above regularities.
This new scaling law allows one to predict the analyzing powers for kinematic
regions, not yet explored in experiments and constrains models of strong
interactions. The new scaling law allows one also to use some reactions as
polarimeters for experiments with a polarized beam.


title: Radiative corrections to K_{l3} decays

abstract:
  We present a complete calculation of the K_{l3} decays K^+ --> pi^0 l^+ nu_l
and K^0 --> pi^- l^+ nu_l to O(p^4, (m_d-m_u) p^2, e^2 p^2) in chiral
perturbation theory with virtual photons and leptons. We introduce the concept
of generalized form factors and kinematical densities in the presence of
electromagnetism, and propose a possible treatment of the real photon emission
in K^+_{l3} decays. We illustrate our results by applying them to the
extraction of the Kobayashi--Maskawa matrix element |V_{us}| from the
experimental K^+_{e3} decay parameters.


title: Electroweak Radiative Corrections at High Energies

abstract:
  For energies far above the electroweak scale, large electroweak radiative
corrections occur that grow logarithmically with energy and can easily reach
several tens of per cent in the TeV range. Recent work on these corrections is
reviewed.


title:
On the dominance of non-exotic meson-meson scattering by s-channel qqbar
  confinement states and the classification of the scalar mesons

abstract:
  Non-exotic scalar-meson resonances in S-wave meson-meson scattering are
studied in the light of a unitarised Schroedinger model. The resulting poles in
the scattering matrices, by analytical continuation into the complex-energy
plane, are grouped into nonets of isoscalar, isodoublet, and isotriplet
resonances. All singularities can be related to quark-antiquark confinement
states, the light-quark nonet of which has ground states at 1.3 to 1.4 GeV and
level spacings of some 300-400 MeV, except for a nonet of light scalar mesons
below 1 GeV. All non-exotic S-wave resonances reported by experiment fit into
this scheme.


title: Muon Dipole Moment Experiments: Interpretation and Prospects

abstract:
  We examine the prospects for discovering new physics through muon dipole
moments. The current deviation in $g_{\mu}-2$ may be due entirely to the muon's
{\em electric} dipole moment. We note that the precession frequency in the
proposed BNL muon EDM experiment is also subject to a similar ambiguity, but
this can be resolved by up-down asymmetry measurements. We then review the
theoretical expectations for the muon's electric dipole moment in
supersymmetric models.