title: Truly Minimal Left-Right Model of Quark and Lepton Masses

abstract:
  We propose a left-right model of quarks and leptons based on the gauge group
$SU(3)_C \times SU(2)_L \times SU(2)_R \times U(1)_{B-L}$, where the scalar
sector consists of only two doublets: (1,2,1,1) and (1,1,2,1). As a result, any
fermion mass, whether it be Majorana or Dirac, must come from dimension-five
operators. This allows us to have a common view of quark and lepton masses,
including the smallness of Majorana neutrino masses as the consequence of a
double seesaw mechanism.


title: KamLAND, terrestrial heat sources and neutrino oscillations

abstract:
  We comment on the first indication of geo-neutrino events from KamLAND and on
the prospects for understanding Earth energetics. Practically all models of
terrestrial heat production are consistent with data within the presently
limited statistics, the fully radiogenic model being closer to the observed
value ($\approx 9$ geo-events). In a few years KamLAND should collect
sufficient data for a clear evidence of geo-neutrinos, however discrimination
among models requires a detector with the class and size of KamLAND far away
from nuclear reactors. We also remark that the event ratio from Thorium and
Uranium decay chains is well fixed $N(Th)/N(U) \simeq 0.25$, a constraint that
can be useful for determining neutrino oscillation parameters. We show that a
full spectral analysis, including this constraint, further reduces the
oscillation parameter space compared to an analysis with an energy threshold
$E_{vis}>2.6 MeV$.


title:
Nuclear Shadowing in DIS: Numerical Solution of the Evolution Equation
  for the Green Function

abstract:
  Within a light-cone QCD formalism based on the Green function technique
incorporating color transparency and coherence length effects we study nuclear
shadowing in deep-inelastic scattering at moderately small Bjorken x_{Bj}.
Calculations performed so far were based only on approximations leading to an
analytical harmonic oscillatory form of the Green function. We present for the
first time an exact numerical solution of the evolution equation for the Green
function using realistic form of the dipole cross section and nuclear density
function. We compare numerical results for nuclear shadowing with previous
predictions and discuss differences.


title: Deconstruction and Bilarge Neutrino Mixing

abstract:
  We present a model for lepton masses and mixing angles using the
deconstruction setup, based on a non-Abelian flavor symmetry which is a split
extension of the Klein group. The symmetries enforce an approximately maximal
atmospheric mixing angle theta_{23}, a nearly vanishing reactor mixing angle
theta_{13}, and the hierarchy of charged lepton masses. The charged lepton mass
spectrum emerges from the Froggatt-Nielsen mechanism interpreted in terms of
deconstructed extra dimensions compactified on S^1. A normal neutrino mass
hierarchy arises from the coupling to right-handed neutrinos propagating in
latticized S^1/Z_2 orbifold extra dimensions. Here, the solar mass squared
difference is suppressed by the size of the dynamically generated bulk
manifold. Without tuning of parameters, the model yields the solar mixing angle
theta_{12} = arctan 1/2^{1/2}. Thus, the obtained neutrino masses and mixing
angles are all in agreement with the Mikheyev--Smirnov--Wolfenstein large
mixing angle solution of the solar neutrino problem.


title:
Paschos-Wolfenstein Relationship for Nuclei and the NuTeV sin^2(theta_W)
  Measurement

abstract:
  We discuss nuclear effects in the Paschos-Wolfenstein relationship in the
context of extraction of the weak mixing angle. We point out that the neutron
excess correction to the Paschos-Wolfenstein relationship for a neutron-rich
target is negative and large on the scale of experimental errors of a recent
NuTeV measurement. We found a larger neutron excess correction to the
Paschos-Wolfenstein relationship for total cross sections than that discussed
by the NuTeV collaboration. Phenomenological applications of this observation
are discussed in the context of the NuTeV deviation. Uncertainties in the
neutron excess correction are estimated. Effects due to Fermi motion, nuclear
binding, and nuclear shadowing are also discussed in the context of total cross
sections.


title: Finite density QCD sum rules for nucleons

abstract:
  It is shown how the QCD sum rules can be applied for the investigation of the
density dependence of the nucleon parameters. These characteristics can be
expressed through the expectation values of QCD operators in nuclear matter. In
certain approximations the expectation values are related to the observables.
First applications of the approach reproduced some of the basic features of
nuclear physics, providing also a new knowledge. The program of the future work
is presented. The difficulties of the approach are discussed.


title: Heavy-Quark Fragmentation

abstract:
  We study perturbative and non-perturbative aspects of heavy-quark
fragmentation into hadrons, emphasizing the large-x region, where x is the
energy fraction of the detected hadron. We first prove that when the moment
index N and the quark mass m get large simultaneously with the ratio (N
Lambda/m) fixed, the fragmentation function depends on this ratio alone. This
opens up the way to formulate the non-perturbative contribution to the
fragmentation function at large N as a shape function of m(1-x) which is
convoluted with the Sudakov-resummed perturbative result. We implement this
resummation and the parametrization of the corresponding shape function using
Dressed Gluon Exponentiation. The Sudakov exponent is calculated in a process
independent way from a generalized splitting function which describes the
emission probability of an off-shell gluon off a heavy quark. Non-perturbative
corrections are parametrized based on the renormalon structure of the Sudakov
exponent. They appear in moment space as an exponential factor, with a leading
contribution scaling as (N Lambda/m) and corrections of order (N Lambda/m)^3
and higher. Finally, we analyze in detail the case of B-meson production in
e+e- collisions, confronting the theoretical predictions with LEP experimental
data by fitting them in moment space.


title: Hadron spin-flip amplitude: an analysis of the new AN data from RHIC

abstract:
  Through a direct analysis of the scattering amplitude, we show that the
preliminary measurement of the analysing power AN obtained by the E950
Collaboration at different energies are mainly sensitive to the spin-flip part
of the amplitude in which the proton scatters with the carbon 12 nucleus as a
whole. The imaginary part of this amplitude is negative, and the real part
positive. We give predictions for pL = 600 GeV/c, which depend mainly on the
size of the real part of the amplitude.


title: Light meson resonances from unitarized Chiral Perturbation Theory

abstract:
  We report on our recent progress in the generation of resonant behavior in
unitarized meson-meson scattering amplitudes obtained from Chiral Perturbation
Theory. These amplitudes provide simultaneously a remarkable description of the
resonance region up to 1.2 GeV as well as the low energy region, since they
respect the chiral symmetry expansion. By studying the position of the poles in
these amplitudes it is possible to determine the mass and width of the
associated resonances, as well as to get a hint on possible classification
schemes, that could be of interest for the spectroscopy of the scalar sector.


title: Statistical Test of Anarchy

abstract:
  "Anarchy" is the hypothesis that there is no fundamental distinction among
the three flavors of neutrinos. It describes the mixing angles as random
variables, drawn from well defined probability distributions dictated by the
group Haar measure. We perform a Kolmogorov-Smirnov (KS) statistical test to
verify whether anarchy is consistent with all neutrino data, including the new
result presented by KamLAND. We find a KS probability for Nature's choice of
mixing angles equal to 64%, quite consistent with the anarchical hypothesis. In
turn, assuming that anarchy is indeed correct, we compute lower bounds on
|U_{e3}|^2, the remaining unknown "angle" of the leptonic mixing matrix.


title: Z decays into light gluinos: a calculation based on unitarity

abstract:
  The Z boson can decay to a pair of light gluinos through loop-mediated
processes. Based on unitarity of the S-matrix, the imaginary part of the decay
amplitude is computed in the presence of a light bottom squark. This imaginary
part can provide useful information on the full amplitude. Implications are
discussed for a recently proposed light gluino and light bottom squark
scenario.


title: Relating different approaches to nuclear broadening

abstract:
  Transverse momentum broadening of fast partons propagating through a large
nucleus is proportional to the average color field strength in the nucleus. In
this work, the corresponding coefficient is determined in three different
frameworks, namely in the color dipole approach, in the approach of Baier et
al. and in the higher twist factorization formalism. This result enables one to
use a parametrization of the dipole cross section to estimate the values of the
gluon transport coefficient and of the higher twist matrix element, which is
relevant for nuclear broadening. A considerable energy dependence of these
quantities is found. In addition, numerical calculations are compared to data
for nuclear broadening of Drell-Yan dileptons, J/psi and Upsilon mesons. The
scale dependence of the strong coupling constant leads to measurable
differences between the higher twist approach and the other two formalisms.


title: Flavor Structure of the Nucleon Sea

abstract:
  The recent progress on our understanding of the flavor structure of
unpolarized and polarized nucleon sea is reviewed. The large flavor asymmetry
between the up and down sea quark distributions is now well established. This
asymmetry strongly suggests the importance of the mesonic degrees of freedom in
the description of the nucleon sea. The strong connection between the flavor
structure and the spin structure of the nucleon sea is emphasized. Possible
future measurements for testing various theoretical models are also discussed.


title: Fulfillment of the strong bootstrap condition

abstract:
  The self-consistency of the assumption of Reggeized form of the production
amplitudes in multi-Regge kinematics, which are used in the derivation of the
BFKL equation, leads to strong bootstrap conditions. The fulfillment of these
conditions opens the way to a rigorous proof of the BFKL equation in the
next-to-leading approximation. The strong bootstrap condition for the kernel of
the BFKL equation for the octet color state of two Reggeized gluons is one of
these conditions. We show that it is satisfied in the next-to-leading
approximation.


title:
Factorization of B decays into two light mesons in soft-collinear
  effective theory

abstract:
  We show that the amplitudes for B decays into two light mesons at leading
order in soft-collinear effective theory are factorized to all orders in
alpha_s. We construct gauge-invariant four-quark operators by employing the
effective theories SCET_I for sqrt{m_b \Lambda} <\mu<m_b, and SCET_II for \mu
<sqrt{m_b \Lambda} with Lambda ~0.5 GeV. These operators do not allow gluon
exchanges between different sectors of the current and the matrix elements are
reduced to the products of current matrix elements. The spectator interactions
are also factorized at leading order in SCET and to all orders in alpha_s.


title:
Electroweak Effects in the Double Dalitz Decay $B_s \to l^+ l^- l'^+
  l'^-$

abstract:
  We investigate the double Dalitz decays $B_s \to l^+ l^- l'^+ l'^-$ on the
basis of the effective Hamiltonian for the transition $b \bar{s} \to l^+ l^-$,
and universal form factors suggested by QCD. The correlated mass spectrum of
the two lepton pairs in the decay $B_s \to e^+ e^- \mu^+ \mu^-$ is derived in
an efficient way, using a QED result for meson decays mediated by two virtual
photons: $B_s \to \gamma^* \gamma^* \to e^+ e^- \mu^+ \mu^-$. A comment is made
on the correlation between the planes of the two lepton pairs. The conversion
ratios $\rho_{lll'l'}= \frac{\Gamma(B_s \to l^+ l^- l'^+ l'^-)}{\Gamma(B_s \to
\gamma \gamma)}$ are estimated to be $\rho_{eeee}=3 \times 10^{-4},
\rho_{ee\mu\mu}=9 \times 10^{-5} \text{and} \rho_{\mu\mu\mu\mu}=3 \times
10^{-5}$, and are enhanced relative to pure QED by $10-30 %$.


title: Comment on and Erratum to "Pressure of Hot QCD at Large N_f"

abstract:
  We repeat and correct the recent calculation of the thermodynamic potential
of hot QCD in the limit of large number N_f of fermions. The new result for the
thermal pressure turns out to agree significantly better with results obtained
from perturbation theory at small coupling. For large coupling, a nonmonotonic
behaviour is reproduced, but the pressure of the strongly coupled theory does
not exceed the free pressure as long as the Landau pole ambiguity remains
negligible numerically.


title: Hadronic decays of eta and eta-prime with coupled channels

abstract:
  The hadronic decays eta -> pi pi pi, eta-prime -> pi pi pi and eta-prime ->
eta pi pi are investigated within a U(3) chiral unitary approach. Final state
interactions are included by deriving the effective s-wave potentials for meson
meson scattering from the chiral effective Lagrangian and iterating them in a
Bethe-Salpeter equation. With only a small set of parameters we are able to
explain both rates and spectral shapes of these decays.


title:
Strong tree level unitarity violations in the extra dimensional Standard
  Model with scalars in the bulk

abstract:
  We show how the tree level unitarity violations of compactified extra
dimensional extensions of the Standard Model become much stronger when the
scalar sector is included in the bulk. This effect occurs when the couplings
are not suppressed for larger Kaluza-Klein levels, and could have relevant
consequences for the phenomenology of the next generation of colliders. We also
introduce a simple and generic formalism to obtain unitarity bounds for finite
energies, taking into account coupled channels including the towers of
Kaluza-Klein excitations.


title:
Neutral-Current Atmospheric Neutrino Flux Measurement Using
  Neutrino-Proton Elastic Scattering in Super-Kamiokande

abstract:
  Recent results show that atmospheric $\nu_\mu$ oscillate with $\delta m^2
\simeq 3 \times 10^{-3}$ eV$^2$ and $\sin^2{2\theta_{atm}} \simeq 1$, and that
conversion into $\nu_e$ is strongly disfavored. The Super-Kamiokande (SK)
collaboration, using a combination of three techniques, reports that their data
favor $\nu_\mu \to \nu_\tau$ over $\nu_\mu \to \nu_{sterile}$. This distinction
is extremely important for both four-neutrino models and cosmology. We propose
that neutrino-proton elastic scattering ($\nu + p \to \nu + p$) in water
\v{C}erenkov detectors can also distinguish between active and sterile
oscillations. This was not previously recognized as a useful channel since only
about 2% of struck protons are above the \v{C}erenkov threshold. Nevertheless,
in the present SK data there should be about 40 identifiable events. We show
that these events have unique particle identification characteristics, point in
the direction of the incoming neutrinos, and correspond to a narrow range of
neutrino energies (1-3 GeV, oscillating near the horizon). This channel will be
particularly important in Hyper-Kamiokande, with $\sim 40$ times higher rate.
Our results have other important applications. First, for a similarly small
fraction of atmospheric neutrino quasielastic events, the proton is
relativistic. This uniquely selects $\nu_\mu$ (not $\bar{\nu}_\mu$) events,
useful for understanding matter effects, and allows determination of the
neutrino energy and direction, useful for the $L/E$ dependence of oscillations.
Second, using accelerator neutrinos, both elastic and quasielastic events with
relativistic protons can be seen in the K2K 1-kton near detector and MiniBooNE.


title: Neutrino Properties Before and After KamLAND

abstract:
  We review neutrino oscillation physics, including the determination of mass
splittings and mixings from current solar, atmospheric, reactor and accelerator
neutrino data. A brief discussion is given of cosmological and astrophysical
implications. Non-oscillation phenomena such as neutrinoless double beta decay
would, if discovered, probe the absolute scale of neutrino mass and also reveal
their Majorana nature. Non-oscillation descriptions in terms of spin-flavor
precession (SFP) and non-standard neutrino interactions (NSI) currently provide
an excellent fit of the solar data. However they are at odds with the first
results from the KamLAND experiment which imply that, despite their theoretical
interest, non-standard mechanisms can only play a sub-leading role in the solar
neutrino anomaly. Accepting the LMA-MSW solution, one can use the current solar
neutrino data to place important restrictions on non-standard neutrino
properties, such as neutrino magnetic moments. Both solar and atmospheric
neutrino data can also be used to place constraints on neutrino instability as
well as the more exotic possibility of $CPT$ and Lorentz Violation.
Weillustrate the potential of future data from experiments such as KamLAND,
Borexino and the upcoming neutrino factories in constraining non-standard
neutrino properties.


title: Precision Observables in the MSSM: Status and Perspectives

abstract:
  The current status of the theoretical predictions for the electroweak
precision observables M_W, sin^2_theta_eff and m_h within the MSSM is briefly
reviewed. The impact of recent electroweak two-loop results to the quantity
Delta_rho is analysed and the sensitivity of the electroweak precision
observables to the top-quark Yukawa coupling is investigated. Furthermore the
level of precision necessary to match the experimental accuracy at the next
generation of colliders is discussed.


title: The Tachyon Inflationary Models with Exact Mode Functions

abstract:
  We show two analytical solutions of the tachyon inflation for which the
spectrum of curvature (density) perturbations can be calculated exactly to
linear order, ignoring both gravity and the self-interactions of the tachyon
field . The main feature of these solutions is that the spectral indices are
independent with scale.


title: On Yukawa quasi-unification with mu<0

abstract:
  Although recent data on the muon anomalous magnetic moment strongly disfavor
the constrained minimal supersymmetric standard model with mu<0, they cannot
exclude it because of theoretical ambiguities. We consider this model
supplemented by a Yukawa quasi-unification condition which allows an acceptable
b-quark mass. We find that the cosmological upper bound on the lightest
sparticle relic abundance is incompatible with the data on the branching ratio
of b-->s gamma, which is evaluated by including all the next-to-leading order
corrections. Thus, this scheme is not viable.


title:
Coexistence of color superconductivity and chiral symmetry breaking
  within the NJL model

abstract:
  The phase diagram for quark matter is investigated within a simple
Nambu-Jona-Lasinio model without vector correlations. It is found that the
phase structure in the temperature-density plane depends sensitively on the
parametrization of the model. We present two schemes of parametrization of the
model where within the first one a first order phase transition from a phase
with broken chiral symmetry to a color superconducting phase for temperatures
below the triple point at T_t= 55 MeV occurs whereas for the second one a
second order phase transition for temperatures below T_t = 7 MeV is found. In
the latter case, there is also a coexistence phase of broken chiral symmetry
with color superconductivity, which is a new finding within this class of
models. Possible consequences for the phenomenology of the QCD phase transition
at high baryon densities are discussed.


title:
A quantum-kinetic treatment for internal dynamics of multilevel atomic
  systems moving through a target matter

abstract:
  The quantum mechanical consideration of a passage of relativistic elementary
atoms (EA) through a target matter is given. A set of quantum-kinetic equations
for the density matrix elements describing their internal state evolution at EA
rest frame is derived.


title: Charge Fluctuation in Heavy Ion Collisions

abstract:
  Charge fluctuations observed in early fixed-target proton-proton experiments
are consistent with string models. In central heavy ion events the picture can
change in two ways: strings can interact and find new ways to hadronize or they
can be effectively inactivated to lose their dynamical role as ordering
mechanism. Widely different charge fluctuations can be expected. The dispersion
of the charges in a central rapidity box is an advantageous measure. In an
explicit Dual-Parton-Model calculation using the DPMJET code and a randomized
modification to simulated charge equilibrium, various energies and different
nuclear sizes were considered. Local fluctuations were found to be a serious
problem. However, for large enough detection regions charged particle
fluctuations can provide a clear signal reflecting the basic dynamics of
central heavy ion processes.


title: Renormalization of coupling constants in the minimal SUSY models

abstract:
  The considerable part of the parameter space in the MSSM corresponding to the
infrared quasi fixed point scenario is excluded by LEP II bounds on the
lightest Higgs boson mass. In the NMSSM the mass of the lightest Higgs boson
reaches its maximum value in the strong Yukawa coupling limit when Yukawa
couplings are essentially larger than gauge ones at the Grand Unification
scale. In this case the renormalization group flow of Yukawa couplings and soft
SUSY breaking terms is investigated. The quasi-fixed and invariant lines and
surfaces are briefly discussed. The coordinates of the quasi-fixed points,
where all solutions are concentrated, are given.


title: All-Orders Singular Emission in Gauge Theories

abstract:
  I present a class of functions unifying all singular limits for the emission
of soft or collinear gluons in gauge-theory amplitudes at any order in
perturbation theory. Each function is a generalization of the antenna functions
of ref. [1]. The helicity-summed interferences these functions are thereby also
generalizations to higher orders of the Catani--Seymour dipole factorization
function.


title: Z -> b b-bar b b-bar in the light gluino and light sbottom scenario

abstract:
  The light gluino (12 - 16 GeV) and light sbottom (2 - 6 GeV) scenario has
been used to explain the apparent overproduction of b-quarks at the Tevatron.
This scenario also predicts the decay Z -> b b-bar ~g ~g where the gluinos
subsequently decay into b-quarks and sbottoms. We show that this can contribute
to the width Gamma_4b = Gamma(Z -> b b-bar b b-bar) since most of the sbottoms
and b-quarks arising from gluino decay have a small angular separation. We find
that while no excess in Gamma_4b is observable due to large uncertainties in
experimental measurements, the ratio Gamma(Z -> b b-bar ~g ~g)/Gamma(Z -> b
b-bar b b-bar) can be large due to sensitivity to b-quark mass, the sbottom
mixing angle and the gluino mass. We calculate it to be in the range 0.05 -
0.41 inclusive of the entire parameter space.


title: Nonequilibrium Evolution of Correlation Functions: A Canonical Approach

abstract:
  We study nonequilibrium evolution in a self-interacting quantum field theory
invariant under space translation only by using a canonical approach based on
the recently developed Liouville-von Neumann formalism. The method is first
used to obtain the correlation functions both in and beyond the Hartree
approximation, for the quantum mechanical analog of the $\phi^{4}$ model. The
technique involves representing the Hamiltonian in a Fock basis of annihilation
and creation operators. By separating it into a solvable Gaussian part
involving quadratic terms and a perturbation of quartic terms, it is possible
to find the improved vacuum state to any desired order. The correlation
functions for the field theory are then investigated in the Hartree
approximation and those beyond the Hartree approximation are obtained by
finding the improved vacuum state corrected up to ${\cal O}(\lambda^2)$. These
correlation functions take into account next-to-leading and
next-to-next-to-leading order effects in the coupling constant. We also use the
Heisenberg formalism to obtain the time evolution equations for the equal-time,
connected correlation functions beyond the leading order. These equations are
derived by including the connected 4-point functions in the hierarchy. The
resulting coupled set of equations form a part of infinite hierarchy of coupled
equations relating the various connected n-point functions. The connection with
other approaches based on the path integral formalism is established and the
physical implications of the set of equations are discussed with particular
emphasis on thermalization.


title: Global Analysis of Solar Neutrino and KamLAND Data

abstract:
  A global analysis of the data from all the solar neutrino experiments
combined with the recent KamLAND data is presented. A formula frequently used
in the literature gives survival probability for three active solar neutrino
flavors in terms of a suitably-modified two-flavor survival probability.
Corrections to this formula, which depend on $\theta_{13}$ and $\delta
m_{31}^2$, are calculated. For the mass scale suggested by the atmospheric
neutrino experiments the contributions of $\delta m_{31}^2$ to these
corrections is found to be negligible. The role of $\theta_{13}$ in solar
neutrino physics is elaborated. For electron neutrino oscillations into another
active flavor, we find best fit values of $\tan^2 \theta_{12} \sim 0.46$,
$\tan^2 \theta_{13} \sim 0$, and $\delta m_{21}^2 \sim 7.1 \times 10^{-5}$
eV$^2$. It is found that the combined solar neutrino and KamLAND date provide
the limit $\cos^4 \theta_{13} < 0.8$ at the 90 % confidence level.


title: Hadrons as Signature of Black Hole Production at the LHC

abstract:
  In models with several large extra dimensions and fundamental Planck scale of
the order of 1 TeV, black holes can be produced in large numbers at LHC
energies. We compute the charged hadron spectra obtained from the decay of
black holes created in p-p and Pb+Pb collisions at LHC. We show that hadrons
from black hole decay dominate at transverse momenta p_T>30-100 GeV/c compared
to usual QCD processes and black hole production signals are easy to identify
in hadron transverse momentum spectra. Furthermore we show that a measurement
of the charged hadron spectra probes Planck scales up to ~5 TeV for any number
of extra dimensions.


title:
Determination of the numerical value for the strong coupling constant
  from tau decays in perturbative QCD

abstract:
  The determination of the numerical value for the strong coupling constant
from tau decays in perturbative QCD is briefly described. Main emphasis is made
on the use of the renormalization scheme invariance of the theory for reducing
uncertainties related to truncation of the series in the strong coupling
constant. The analysis of the convergence of the series is presented and the
possibility of the asymptotic growth at the NNNLO is discussed.


title: Conformal matter in warped backgrounds

abstract:
  Warped backgrounds in five dimensional models can provide solutions to
various hierarchy problems in particle physics if the standard model matter is
associated with the zero modes of bulk fields with nontrivial profiles along
the extra dimension. We investigate the case of a {\sl conformally} coupled
massless scalar. This field possesses a zero mode whose action density is
exponentially enhanced along the transverse direction in a warped background,
{\em i.e.} near the negative tension brane in the RS setting. At the zero mode
level effective 5D composites of this scalar and its derivatives, which are
suppressed by powers of the fundamental gravitational scale, yield 4D
interactions of electroweak strength. This suggests a certain importance of
conformally coupled scalar fields for extra-dimensional model building.


title:
Variation of the relative yield of charged and neutral B mesons across
  the Upsilon(4S) resonance

abstract:
  It is shown that the ratio of the production rates of the pairs (B+ B-) and
(B0 anti-B0) should experience a substantial and rapid variation with energy
within the width of the Upsilon(4S) resonance, crossing the value of one near
the center of the resonance. This behavior is due to an interference of the
rapidly changing with energy Breit-Wigner phase with the phase introduced in
the wave function of charged mesons by their Coulomb interaction.


title:
Probing coherent charmonium photoproduction off light nuclei at medium
  energies

abstract:
  We demonstrate how the elementary amplitudes $\gamma N\to \Psi N$, the
amplitude of the nondiagonal $J/\psi N\Leftrightarrow \psi' N$ transition, and
the total $J/\psi N$ and $\psi' N$ cross sections can be determined from
measurements of the coherent $J/\psi$ and $\psi'$ photoproduction off light
nuclei at moderate energies. For this purpose we provide a detailed numerical
analysis of the coherent charmonium photoproduction off silicon within the
generalized vector dominance model (GVDM) adjusted to account for the physics
of charmonium models and color transparency phenomenon.


title: Fourth generation effects in processes induced by "b -> s" transition

abstract:
  We study the effects of sequential fourth quark generation in rare "B ->
K(K*) l^+ l^-" decays induced by "b -> s" transition and in "B_s^0 -
bar{B}_s^0" mixing. Using the experimental values on branching ratios of the "B
-> X_s gamma" and "B -> K(K*) l^+ l^-" decays, the allowed regions for $\vel
V_{tb} V_{ts}^\ast\ver$ and "|V_{t'b} V_{t's}*| are determined as a function of
the (t') quark mass.


title:
Bounds on Leptoquark and Supersymmetric, R-parity violating Interactions
  from Meson Decays

abstract:
  We present constraints on products of two leptoquark (LQ) coupling constants.
The bounds are obtained from meson decays, in particular leptonic \pi, K, D,
D_s, B, B_s decays. Furthermore semileptonic meson decays and mixing in neutral
meson systems are discussed. We use the Buchmueller-Rueckl-Wyler-model for
scalar and vector LQs. Bounds on R-parity violation can be extracted directly
from the corresponding LQ bounds. Our results are listed in the Tables 6 (for
LQs) and 7 (for SUSY particles) with english captions. The bounds of
Davidson/Bailey/Campbell were updated. The SUSY-bounds of
Dreiner/Polesello/Thormeier were reproduced.


title:
Lindhard Factors and Concentrations of Primary Defects in Semiconductor
  Materials for uses in HEP

abstract:
  This report is a compilation of authors' calculations of the Lindhard
factors, and of the concentration of primary radiation defects per unit
particle fluence in different materials for HEP uses.


title:
Energy Consumption and Jet Multiplicity from the Leading Log BFKL
  Evolution

abstract:
  We study the associated jet multiplicity arising from t-channel BFKL gluon
evolution in forward dijet production at hadron colliders. Previous results
have shown that the effect of conserving overall energy and momentum is to
introduce a pdf suppression that completely compensates the predicted
exponential BFKL rise with rapidity difference between the leading dijets.
However, we show that there is still expected to be a significant amount of
BFKL radiation, especially in the central region, and we give predictions for
the multiplicity of the resulting mini-jets at the LHC.


title: CP violation in $B_{d,s} \to l^+l^-$ in the model III 2HDM

abstract:
  We have calculated the Wilson coefficients $C_{10}, C_{Q_i}$ (i=1,2) in the
$\bar{MS}$ renormalization scheme in the model III 2HDM. Using the obtained
Wilson coefficients, we have analyzed the CP violation in decays $B^0_q\to
l^+l^-$ (q=d,s) in the model. The CP asymmetry, $A_{CP}$, depends on the
parameters of models and $A_{CP}$ in $B_d\to l^+l^-$ can be as large as 40% and
35% for $l=\tau$ and $l=\mu$ respectively. It can reach 4% for $B^0_s$ decays.
Because in SM CP violation is smaller than or equal to O($10^{-3}$) which is
unobservably small, an observation of CP asymmetry in the decays $B^0_q \to
l^+l^- (q=d,s)$ would unambiguously signal the existence of new physics.


title: Is There A Higgs Boson With Mass Below 100 GeV/c2 In The LEP Data?

abstract:
  There could be a Higgs boson with a mass less than 100 GeV/c2 in the LEP data
if its decay width and modes are not dominated by b quarks. At present, the
quantum interference between signal and background processes has not been
considered in flavour independent searches but when it is, the long-sought
particle may appear.


title: From Static Potentials to High-Energy Scattering

abstract:
  We develop a loop-loop correlation model for a unified description of static
color dipole potentials, confining QCD strings, and hadronic high-energy
reactions with special emphasis on saturation effects manifesting S-matrix
unitarity at ultra-high energies. The model combines perturbative gluon
exchange with the non-perturbative stochastic vacuum model which describes
color confinement via flux-tube formation of color fields. We compute the
chromo-field distributions of static color dipoles in various SU(N_c)
representations and find Casimir scaling in agreement with recent lattice QCD
results. We investigate the energy stored in the confining string and use
low-energy theorems to show consistency with the static quark-antiquark
potential. We generalize Meggiolaro's analytic continuation from parton-parton
to dipole-dipole scattering and obtain a Euclidean approach to high-energy
scattering that allows us in principle to calculate S-matrix elements in
lattice QCD. In this approach we compute high-energy dipole-dipole scattering
with the Euclidean loop-loop correlation model. Together with a universal
energy dependence and reaction-specific wave functions, the result forms the
basis for a unified description of proton-proton, pion-proton, kaon-proton,
photon-proton, and photon-photon reactions in good agreement with experimental
data for cross sections, slope parameters, and structure functions. The
obtained impact parameter profiles for proton-proton and longitudinal
photon-proton reactions and the impact parameter dependent gluon distribution
of the proton xG(x,Q^2,b) show saturation at ultra-high energies in accordance
with unitarity constraints.


title: Universality in fermionic field theories at finite temperature

abstract:
  We discuss the critical properties of the three-dimensional NJL model at
nonzero temperature. We show that the Z(2)-symmetric model undergoes a second
order phase transition with 2d Ising exponents and its critical region is
suppressed by a factor 1/N^{-0.5}. We also provide numerical evidence that the
U(1)-symmetric model undergoes a BKT transition in accordance with the
dimensional reduction scenario.


title: Ultra-high energy cosmic rays, cosmological constant, and $\theta$-vacua

abstract:
  We propose that the origin of ultra-high energy cosmic rays beyond the GZK
cutoff and the origin of small cosmological constant can both be explained by
vacuum tunneling effects in a theory with degenerate vacua and fermionic
doublets. By considering the possibility of tunneling from a particular winding
number state, accompanied by violation of some global quantum number of
fermions, the small value of the vacuum dark energy and the production of high
energy cosmic rays are shown to be related. We predict that the energy of such
cosmic rays should be at least $5\times 10^{14}$ GeV.


title: Effects of quark matter and color superconductivity in compact stars

abstract:
  The equation of state for quark matter is derived for a nonlocal, chiral
quark model within the mean field approximation. We investigate the effects of
a variation of the form factors of the interaction on the phase diagram of
quark matter under the condition of beta-equilibrium and charge neutrality.
Special emphasis is on the occurrence of a diquark condensate which signals a
phase transition to color superconductivity and its effects on the equation of
state. We calculate the quark star configurations by solving the Tolman-
Oppenheimer- Volkoff equations and obtain for the transition from a hot, normal
quark matter core of a protoneutron star to a cool diquark condensed one a
release of binding energy of the order of Delta M c^2 ~ 10^{53} erg. We study
the consequences of antineutrino trapping in hot quark matter for quark star
configurations with possible diquark condensation and discuss the claim that
this energy could serve as an engine for explosive phenomena. A "phase diagram"
for rotating compact stars (angular velocity-baryon mass plane) is suggested as
a heuristic tool for obtaining constraints on the equation of state of QCD at
high densities. It has a critical line dividing hadronic from quark core stars
which is correlated with a local maximum of the moment of inertia and can thus
be subject to experimental verification by observation of the rotational
behavior of accreting compact stars.


title: Supersymmetric One-family Model without Higgsinos

abstract:
  The Higgs potential and the mass spectrum of the N=1 supersymmetric extension
of a recently proposed one-family model based on the local gauge group $SU(3)_c
\otimes SU(3)_L \otimes U(1)_X$, which is a subgroup of the electroweak-strong
unification group $E_6$, is analyzed. In this model the slepton multiplets play
the role of the Higgs scalars and no Higgsinos are needed, with the consequence
that the sneutrino, the selectron and six other sleptons play the role of the
Goldstone bosons. We show how the $\mu$ problem is successfully addressed in
the context of this model which also predicts the existence of a light CP-odd
scalar.


title: The Bohr Atom of Glueballs

abstract:
  Recently Buniy and Kephart made an astonishing empirical observation, which
anyone can reproduce at home. Measure the {\it lengths} of closed knots tied
from ordinary rope. The ``double do-nut'', and the beautiful trefoil knot are
examples. Tie the knots tightly, and glue or splice the tails into a seamless
unity. Compare two knots with corresponding members of the mysterious particle
states known as ``glueball'' candidates in the literature. Propose that the
microscopic glueball mass ought to be proportional to the macroscopic mass of
the corresponding knot. Fit two parameters, then {\it predict} 12 of 12
remaining glueball masses with extraordinary accuracy, knot by knot. Here we
relate these observations to the fundamental gauge theory of gluons, by
recognizing a hidden gauge symmetry bent into the knots. As a result the
existence and importance of a gluon mass parameter is clarified. Paradoxically
forbidden by the usual framework, the gluon mass cannot be expressed in the
usual coordinates, but has a natural meaning in the geometry of knots.


title: A New Renormalization Scheme of Fermion Field in Standard Model

abstract:
  In order to obtain proper wave-function renormalization constants for
unstable fermion and consist with Breit-Wigner formula in the resonant region,
We have assumed an extension of the LSZ reduction formula for unstable fermion
and adopted on-shell mass renormalization scheme in the framework of without
field renormaization. The comparison of gauge dependence of physical amplitude
between on-shell mass renormalization and complex-pole mass renormalization has
been discussed. After obtaining the fermion wave-function renormalization
constants, we extend them to two matrices in order to include the contributions
of off-diagonal two-point diagrams at fermion external legs for the convenience
of calculations of S-matrix elements.


title: $\eta_c$ production and dimuon enhancement in heavy ion collisions

abstract:
  Dilepton production in heavy ion collisions, in the Intermediate Mass Region
(IMR) has consistently shown an excess over theoretical estimates. An attempt
to understand this discrepancy between the observed dilepton pairs and the
theoretical estimate is made here through the production of the $\eta_c$ meson
and estimates obtained by NRQCD calculations. We find that $\eta_c$ production
offers a satisfactory quantitative picture for explaining the discrepancy.


title: Some Simple Mixing and Mass Matrices for Neutrinos

abstract:
  We argue that the accumulated neutrino data, including recent results from
KamLAND and K2K, point to a neutrino mixing matrix with (V_{11}, V_{21},
V_{31}; V_{21}, V_{22}, V_{32}; V_{13}, V_{23}, V_{33}) = (-2/\sqrt{6},
1/\sqrt{6}, 1/\sqrt{6}; 1/\sqrt{3}, 1/\sqrt{3}, 1/\sqrt{3}; 0, 1/\sqrt{2},
-1/\sqrt{2}). We propose some simple neutrino mass matrices which predict such
a mixing matrix.


abstract:
  We discuss the method of $\Phi$-derivable approximations in gauge theories.
There, two complications arise, namely the violation of Bose symmetry in
correlation functions and the gauge dependence. For the latter we argue that
the error introduced by the gauge dependent terms is controlled, therefore not
invalidating the method.


title:
Non-perturbative Propagators, Running Coupling and Dynamical Quark Mass
  of Landau gauge QCD

abstract:
  The coupled system of renormalized Dyson-Schwinger equations for the quark,
gluon and ghost propagators of Landau gauge QCD is solved within truncation
schemes. These employ bare as well as non-perturbative ansaetze for the
vertices such that the running coupling as well as the quark mass function are
independent of the renormalization point. The one-loop anomalous dimensions of
all propagators are reproduced. Dynamical chiral symmetry breaking is found,
the dynamically generated quark mass agrees well with phenomenological values
and corresponding results from lattice calculations. The effects of unquenching
the system are small. In particular the infrared behavior of the ghost and
gluon dressing functions found in previous studies is almost unchanged as long
as the number of light flavors is smaller than four.


title:
Quasi-Degenerate Neutrino Mass Spectrum, \mu -> e + \gamma Decay and
  Leptogenesis

abstract:
  In a large class of SUSY GUT models with see-saw mechanism of neutrino mass
generation, lepton flavor violating (LFV) decays $\mu \to e + \gamma$, $\tau
\to \mu + \gamma$, etc., are predicted with rates that are within the reach of
present and planned experiments. A crucial element in these predictions is the
matrix of neutrino Yukawa couplings $\ynu$ which can be expressed in terms of
the light and RH heavy neutrino masses, the neutrino mixing PMNS matrix $U$,
and an orthogonal matrix $\mathbf{R}$. Leptogenesis can take place only if
$\mathbf{R}$ is complex. Considering the case of quasi-degenerate neutrinos and
assuming that $\mathbf{R}$ is complex, we derive simple analytical expressions
for the $\mu \to e + \gamma$, $\tau \to \mu + \gamma$ and $\tau \to e + \gamma$
decay rates. Taking into account the leptogenesis constraints on the relevant
parameters we show that the predicted rates of the LFV decays $\mu \to e +
\gamma$, and $\tau \to e + \gamma$ are generically enhanced by a factor of
$\sim 10^{3}$ to $\sim 10^{6}$ with respect to the rates calculated for real
$\mathbf{R}$, while the $\tau \to \mu + \gamma$ decay rate is enhanced
approximately by two orders of magnitude.


title:
Pinch technique self-energies and vertices to all orders in perturbation
  theory

abstract:
  The all-order construction of the pinch technique gluon self-energy and
quark-gluon vertex is presented in detail within the class of linear covariant
gauges. The main ingredients in our analysis are the identification of a
special Green's function, which serves as a common kernel to all self-energy
and vertex diagrams, and the judicious use of the Slavnov-Taylor identity it
satisfies. In particular, it is shown that the ghost-Green's functions
appearing in this identity capture precisely the result of the pinching action
at arbitrary order. By virtue of this observation the construction of the
quark-gluon vertex becomes particularly compact. It turns out that the
aforementioned ghost-Green's functions play a crucial role, their net effect
being the non-trivial modification of the ghost diagrams of the quark-gluon
vertex in such a way as to reproduce dynamically the characteristic ghost
sector of the background field method. The gluon self-energy is also
constructed following two different procedures. First, an indirect derivation
is given, by resorting to the strong induction method and the assumption of the
uniqueness of the S-matrix. Second, an explicit construction based on the
intrinsic pinch technique is provided, using the Slavnov-Taylor identity
satisfied by the all-order three-gluon vertex nested inside the self-energy
diagrams. The process-independence of the gluon self-energy is also
demonstrated, by using gluons instead of quark as external test particles, and
identifying the corresponding kernel function, together with its Slavnov-Taylor
identity. Finally, the general methodology for carrying out the renormalization
of the resulting Green's functions is outlined, and various open questions are
briefly discussed.


title: Effects of genuine dimension-six Higgs operators

abstract:
  We systematically discuss the consequences of genuine dimension-six Higgs
operators. These operators are not subject to stringent constraints from
electroweak precision data. However, they can modify the couplings of the Higgs
boson to electroweak gauge bosons and, in particular, the Higgs
self-interactions. We study the sensitivity to which those couplings can be
probed at future $\ee$ linear colliders in the sub-TeV and in the multi-TeV
range. We find that for $\sqrt s=500$ GeV with a luminosity of 1 ab$^{-1}$ the
anomalous $WWH$ and $ZZH$ couplings may be probed to about the 0.01 level, and
the anomalous $HHH$ coupling to about the 0.1 level.


title: Renormalization group evolution of the CKM matrix

abstract:
  We present here the most important ideas, equations and solutions for the
running of all the quark Yukawa couplings and all the elements of the
Cabibbo-Kobayashi-Maskawa matrix, in the approximation of one loop, and up to
order $\lambda ^{4}$, where $\lambda \sim 0.22$ is the sine of the Cabibbo
angle. Our purpose is to determine what the evolution of these parameters may
indicate for the physics of the standard model (SM), the minimal supersymmetric
standard model (MSSM) and for the Double Higgs Model (DHM).


title: QCD Equations of State and the QGP Liquid Model

abstract:
  Recent advances in the study of equations of state of thermal lattice Quantum
Chromodynamics obtained at non-zero baryon density allow validation of the
quark-gluon plasma (QGP) liquid model equations of state (EoS). We study here
the properties of the QGP-EoS near to the phase transformation boundary at
finite baryon density and show a close agreement with the lattice results.


title: Formation of Magnetic Monopoles in Hot Gauge Theories

abstract:
  In this talk, I discuss the formation of magnetic monopoles in a phase
transition from the confining SU(2) phase to the Coulomb phase in a hot
Georgi-Glashow model. I argue that monopoles are formed from long-wavelength
thermal fluctuations, which freeze out after the phase transition.


title:
SPheno, a program for calculating supersymmetric spectra, SUSY particle
  decays and SUSY particle production at e+ e- colliders

abstract:
  SPheno is a program that accurately calculates the supersymmetric particle
spectrum within a high scale theory, such as minimal supergravity, gauge
mediated supersymmetry breaking, anomaly mediated supersymmetry breaking, or
string effective field theories. An interface exists for an easy implementation
of other models. The program solves the renormalization group equations
numerically to two--loop order with user-specified boundary conditions. The
complete one--loop formulas for the masses are used which are supplemented by
two--loop contributions in case of the neutral Higgs bosons and the mu
parameter. The obtained masses and mixing matrices are used to calculate decay
widths and branching ratios of supersymmetric particles as well as of Higgs
bosons, b -> s gamma, Delta(rho) and (g-2)_muon. Moreover, the production cross
sections of all supersymmetric particle as well as Higgs bosons at e+ e-
colliders can be calculated including initial state radiation and longitudinal
polarization of the incoming electrons/positrons. The program is structured
such that it can easily be extend to include non-minimal models and/or complex
parameters.


title:
Resummation Study on Decay $\rho\to\pi\pi$ in $U(2)_L\times U(2)_R$
  Chiral Theory of Mesons

abstract:
  We improve $O(p^4)$ calculation in $U(2)_L\times U(2)_R$ chiral theory of
mesons by resummation calculation for vector mesons physics and restudy decay
$\rho\to\pi\pi$. A complete and compact expression for $f_{\rho\pi\pi}(p^2)$
(up to $O(p^\infty)$) is obtained, from which an important non-perturbative
conclusion is given based on convergence and unitarity consideration.


title:
The Kinetic Interpretation of the DGLAP Equation, its Kramers-Moyal
  Expansion and Positivity of Helicity Distributions

abstract:
  According to a rederivation - due to Collins and Qiu - the DGLAP equation can
be reinterpreted (in leading order) in a probabilistic way. This form of the
equation has been used indirectly to prove the bound $|\Delta f(x,Q)| < f(x,Q)$
between polarized and unpolarized distributions, or positivity of the helicity
distributions, for any $Q$. We reanalize this issue by performing a detailed
numerical study of the positivity bounds of the helicity distributions. To
obtain the numerical solution we implement an x-space based algorithm for
polarized and unpolarized distributions to next-to-leading order in $\alpha_s$,
which we illustrate. We also elaborate on some of the formal properties of the
Collins-Qiu form and comment on the underlying regularization, introduce a
Kramers-Moyal expansion of the equation and briefly analize its Fokker-Planck
approximation. These follow quite naturally once the master version is given.
We illustrate this expansion both for the valence quark distribution $q_V$ and
for the transverse spin distribution $h_1$.


title:
Confronting Spectral Functions from e+e- Annihilation and tau Decays:
  Consequences for the Muon Magnetic Moment

abstract:
  Vacuum polarization integrals involve the vector spectral functions which can
be experimentally determined from two sources: (i) e+e- annihilation cross
sections and (ii) hadronic tau decays. Recently results with comparable
precision have become available from CMD-2 on one side, and ALEPH, CLEO and
OPAL on the other. The comparison of the respective spectral functions involves
a correction from isospin-breaking effects, which is evaluated. After the
correction it is found that the dominant pi+pi- spectral functions do not agree
within experimental and theoretical uncertainties. Some disagreement is also
found for the 4pi spectral functions. The consequences of these discrepancies
for vacuum polarization calculations are presented, with the emphasis on the
muon anomalous magnetic moment. Adding quadratically experimental and
theoretical uncertainties, we find that the full Standard Model prediction of
a_mu deviates from the recent BNL measurement at the level of 3.0 (e+e--based)
and 0.9 (tau-based) standard deviations.


title:
Determination of $\Delta\Gamma_s$ from Analysis of Untagged Decays
  $B^0_s\to J/\psi\phi$ by Using the Method of Angular Moments

abstract:
  The performance of the method of angular moments on the $\Delta\Gamma_s$
determination from analysis of untagged decays $B^0_s(t),\bar{B}^0_s(t)\to
J/\psi(\to l^+l^-)\phi(\to K^+K^-)$ is examined.
  The results of Monte Carlo studies with evaluation of measurement errors are
presented.
  The method of angular moments gives stable results for the estimate of
$\Delta\Gamma_s$ and is found to be an efficient and flexible tool for the
quantitative investigation of the $B^0_s\to J/\psi\phi$ decay.
  The statistical error of the ratio $\Delta\Gamma_s/\Gamma_s$ for values of
this ratio in the interval [0.03, 0.3] was found to be independent on this
value, being 0.015 for $10^5$ events.


title:
Accurate relic densities with neutralino, chargino and sfermion
  coannihilations in mSUGRA

abstract:
  Neutralinos arise as natural dark matter candidates in many supersymmetric
extensions of the Standard Model. We present a novel calculation of the
neutralino relic abundance in which we include all so called coannihilation
processes between neutralinos, charginos and sfermions, and, at the same time,
we apply the state of the art technique to trace the freeze-out of a species in
the early Universe. As a first application, we discuss here results valid in
the mSUGRA framework; we enlight general trends as well as perform a detailed
study of the neutralino relic densities in the mSUGRA parameter space. The
emerging picture is fair agreement with previous analyses in the same
framework, however we have the power to discuss it in many more details than
previously done. E.g., we find that the cosmological bound on the neutralino
mass is pushed up to ~565 GeV in the stau coannihilation region and to ~1500
GeV in the chargino coannihilation region.


title:
Kugo-Ojima confinement criterion, Zwanziger-Gribov horizon condition,
  and infrared critical exponents in Landau gauge QCD

abstract:
  The Kugo-Ojima confinement criterion and its relation to the infrared
behaviour of the gluon and ghost propagators in Landau gauge QCD are reviewed.
The realization of this confinement criterion (which in Landau gauge relates to
Zwanziger's horizon condition) results from quite general properties of the
ghost Dyson-Schwinger equation. The numerical solutions for the gluon and ghost
propagators obtained from a truncated set of Dyson-Schwinger equations provide
an explicit example for the anticipated infrared behaviour. These results are
in good agreement, also quantitatively, with corresponding lattice data
obtained recently. The resulting running coupling approaches a fixed point in
the infrared, $\alpha(0) = 8.9/N_c$. Solutions for the coupled system of
Dyson-Schwinger equations for the quark, gluon and ghost propagators are
presented. Dynamical generation of quark masses and thus spontaneous breaking
of chiral symmetry is found. In the quenched approximation the quark propagator
functions agree well with those of corresponding lattice calculations. For a
small number of light flavours the quark, gluon and ghost propagators deviate
only slightly from the quenched ones. While the positivity violation of the
gluon spectral function is apparent in the gluon propagator, there are no clear
indications of positivity violations in the Landau gauge quark propagator.


title: Dynamical Symmetry Breaking of Extended Gauge Symmetries

abstract:
  We construct asymptotically free gauge theories exhibiting dynamical breaking
of the left-right, strong-electroweak gauge group $G_{LR} = {\rm SU}(3)_c
\times {\rm SU}(2)_L \times {\rm SU}(2)_R \times {\rm U}(1)_{B-L}$, and its
extension to the Pati-Salam gauge group $G_{422}={\rm SU}(4)_{PS} \times {\rm
SU}(2)_L \times {\rm SU}(2)_R$. The models incorporate technicolor for
electroweak breaking, and extended technicolor for the breaking of $G_{LR}$ and
$G_{422}$ and the generation of fermion masses, including a seesaw mechanism
for neutrino masses. These models explain why $G_{LR}$ and $G_{422}$ break to
${\rm SU}(3)_c \times {\rm SU}(2)_L \times {\rm U}(1)_Y$, and why this takes
place at a scale ($\sim 10^3$ TeV) which is large compared to the electroweak
scale.


title: Nuclear A-dependence near the Saturation Boundary

abstract:
  The A-dependence of the saturation momentum and the scaling behavior of the
scattering of a small dipole on a nuclear target are studied in the
McLerran-Venugopalan model, in fixed coupling BFKL dynamics and in running
coupling BFKL dynamics. In each case, we find scaling not too far from the
saturation boundary, although for fixed coupling evolution the scaling function
for large A is not the same as for an elementary dipole. We find that $Q_s^2$
is proportional to $A^{1/3}$ in the McLerran-Venugopalan model and in fixed
coupling evolution, however, we find an almost total lack of A-dependence in
$Q_s^2$ in the case of running coupling evolution.


title:
SUSY QCD and SUSY Electroweak Loop Corrections to $b, t$ and $\tau$
  Masses Including the Effects of CP Phases

abstract:
  We compute supersymmetric QCD and supersymmetric electroweak corrections to
the b and t quark masses and to the $\tau$ lepton mass in the presence of CP
phases valid for all $\tan\beta$. The analysis includes one loop diagrams
arising from the exchange of gluinos, charginos and neutralinos. We find that
the CP effects can change both the magnitude as well as the sign of the
supersymmetric loop correction. In the region of parameter space studied we
found that the numerical size of the correction to the b quark mass can be as
large as 30 percent and to the $\tau$ lepton mass as much as 5 percent. For the
top quark mass the correction is typically less than a percent. These
corrections are of importance in unified models since $b-\tau$ and $b-t-\tau$
unification is strongly affected by the size of these corrections. More
generally these results will be of importance in analyses of quark-lepton
textures with the inclusion of CP phases. Further, the analysis presented here
is relevant in a variety of low energy phenomena where supersymmetric QCD and
supersymmetric electroweak corrections on b mass enter prominently in B
physics, e.g., in processes such as $B^0_{s,d}\to l^+\l^-$.


title: The LHC / LC Study Group and the Snowmass Points and Slopes

abstract:
  The ``LHC / LC Study Group'' investigates how analyses at the LHC could
profit from results obtained at a future Linear Collider and vice versa. Some
of the activities of this recently formed working group are briefly summarised.
The LHC / LC Study Group home page is http://www.ippp.dur.ac.uk/~georg/lhclc/ .
The ``Snowmass Points and Slopes'' (SPS) are a set of benchmark points and
parameter lines in the MSSM parameter space corresponding to different
scenarios in the search for Supersymmetry at present and future experiments.
This set of benchmarks was agreed upon at the 2001 ``Snowmass Workshop on the
Future of Particle Physics'' as a consensus based on different existing
proposals. Further information about the SPS can be found under
http://www.ippp.dur.ac.uk/~georg/sps/ .


title:
Regularities of vector-meson electroproduction: transitory effects or
  early asymptotics?

abstract:
  We discuss recent HERA results on vector--meson electroproduction gamma*p ->
Vp and demonstrate that universality of the initial and final state
interactions responsible for the transition between the on- and off-mass shell
states allows to explain energy independence of the ratio of exclusive rho
electroproduction cross section to the total cross section. We also predict
explicit mass dependence of this ratio for other vector mesons.


title: Experimental Tests of Non-Perturbative Pion Wave Functions

abstract:
  We use the transverse-momentum dependence of the cross section for
diffractive dissociation of high energy pions to two jets to study some
non-perturbative Light-Cone wave functions of the pion. We compare the
predictions for this distribution by Gaussian and Coulomb wave functions as
well as the wave function derived from solution of the Light-Cone Hamiltonian
in the Singlet Model. We conclude that this experimentally measured information
provides a powerful tool for these studies.


title: Virtual and Soft Pair Corrections to Polarized Muon Decay Spectrum

abstract:
  Radiative corrections to the muon decay spectrum due to soft and virtual
electron--positron pairs are calculated.


title: The Chances to Produce and Detect the b-b-ubar-dbar Tetraquark at LHC

abstract:
  In the LHC collider a significant rate of events with double parton
scattering is expected. This will be the leading mechanism for production of
two b-bbar pairs. We estimate the probability of binding two b quarks into a
diquark and the probability of dressing this diquark into a b-b-ubar-dbar
ISP=01+ tetraquark. Calculations shows that that this bound state of two B
mesons is stable against the strong interaction and has a life time of the
order of ps. We estimate that the production rate at luminosity L=0.1 events
per second will be about 6 tetraquarks per hour or more.


title: Anomalous production of top quarks at CLIC+LHC based gamma p colliders

abstract:
  The single production of top quark due to flavor changing neutral current
(FCNC) interaction and its decay to bW are studied at CLIC+LHC based gamma-p
colliders. We consider both t-c-gamma and t-u-gamma anomalous couplings. The
anomalous charm (up) quark anomalous coupling parameter kappa_gamma^c
(kappa_gamma^u) can be probed down to 9.5x10^-3 (8.0x10^-3) at a gamma-p
collider with sqrt{s_ep}=6.48 TeV and L_int=100 fb^-1.


title: Nonequilibrium Goldstone phenomenon in Hybrid Inflation

abstract:
  We study the onset of Goldstone phenomenon in a hybrid inflation scenario.
The physically motivated range of parameters is analyzed in order to meet the
cosmological constraints. Classical equations of motion are solved and the
evolution through the spontaneous symmetry breaking is followed. We emphasize
the role of topological defects that partially maintain the disordered phase
well after the waterfall. We study the emergence of the Goldstone excitations
and their role in the onset of the radiation dominated universe.


title: Non-factorizable effects in B-anti-B mixing

abstract:
  We study the B-parameter (``bag factor'') for B-anti-B mixing within a
recently developed heavy-light chiral quark model. Non-factorizable
contributions in terms of gluon condensates and chiral corrections are
calculated. In addition, we also consider 1/m_Q corrections within heavy quark
effective field theory. Perturbative QCD effects below \mu = m_b known from
other work are also included. Considering two sets of input parameters, we find
that the renormalization invariant B-parameter is B = 1.51 +- 0.09 for B_d and
B = 1.40 +- 0.16 for B_s.


title: Fermion Masses and Mixing in Thick Branes

abstract:
  Fermion masses and mixing, both in the quark and leptonic sector, are
discussed within the approach to the Yukawa puzzle proposed by Arkani-Hamed and
Schmaltz. In the quark sector we have shown that at least two extra dimensions
are necessary in order to obtain sufficient CP violation, while reproducing the
correct quark mass spectrum and mixing angles. We have also studied the
consequences of suppressing lepton number violating charged lepton decays
within this scenario for lepton masses and mixing angles.


title: Strange Quark Mass Determination From Sum Rules For Hadronic Tau-Decays

abstract:
  We discuss the ratio of hadronic to leptonic tau-decays, that can be expanded
in an operator product expansion. The sensitivity to the strange mass is
increased, if only the flavor-breaking difference of strange to non-strange
currents is considered, which leaves us with terms that are at leading order
proportional to m_s^2. In this sum rule the scalar channel exhibits a very bad
convergence behavior in the perturbation series, that we control by replacing
the scalar OPE with a phenomenological ansatz for the scalar and pseudoscalar
spectral functions. The spectral ansatz is compared to the theoretical (OPE)
expressions and we show that the results agree within the uncertainties and
that the uncertainties of our ansatz are smaller than those of the theoretical
expressions. This allows us to considerably reduce the uncertainties in
comparison to previous m_s determinations from tau-decays. Our final results
are m_s(2 GeV) = 117+-17 MeV for the unitarity fit of |V_us| and m_s(2 GeV) =
103+-17 MeV for the Leutwyler-Roos value of |V_us|.


title:
Low-scale supersymmetry breaking: effective description, electroweak
  breaking and phenomenology

abstract:
  We consider supersymmetric scenarios in which the scale of SUSY breaking is
low, sqrt{F}=O(TeV). Instead of studying specific models of this type, e.g.
those with extra dimensions and low fundamental scale, we follow a
model-independent approach based on a general effective Lagrangian, in which
the MSSM supermultiplets are effectively coupled to a singlet associated to
SUSY breaking. Our goal is to analyse the interplay bewteen SUSY breaking and
electroweak breaking, generalizing earlier results. The conventional MSSM
picture can be substantially modified, mainly because the Higgs potential
contains additional effective quartic terms and resembles that of
two-Higgs-doublet models, with an additional singlet. Novel opportunities to
achieve electroweak breaking arise, and the electroweak scale may be obtained
in a less fine-tuned way. Also the Higgs spectrum can be strikingly changed,
and the lightest state can be much heavier than in usual supersymmetric
scenarios. Other effects appear in the chargino and neutralino sectors, which
contain the goldstino. Finally, we discuss the role of electroweak breaking in
processes in which two goldstinos could be emitted, such as fermion-antifermion
annihilation and the invisible decay of a Z boson or of neutral Higgs bosons.


title: What Does the Balance Function Measure?

abstract:
  The balance function has been proposed to `clock' hadronization by measuring
the charge-dependent correlation length on rapidity. According to the proposal
a narrowed balance function would imply reduced hadron diffusion time and
therefore delayed hadronization due to a long-lived prehadronic state, a
quark-gluon plasma or QGP. I examine this chain of argument in the context of
hadronization and rescattering. I then consider the algebraic structure of the
balance function and its systematic dependence on the charge correlation length
on rapidity. I conclude that the width of the balance function cannot determine
a time interval from hadronization to kinetic decoupling, nor can the width
determine the existence or temporal extent of a QGP.


title: Factorization and Sudakov Resummation in Leptonic Radiative B Decay

abstract:
  Soft-collinear effective theory is used to prove factorization of the
B->gamma+l+nu decay amplitude at leading power in Lambda/m_b, including a
demonstration of the absence of non-valence Fock states and of the finiteness
of the convolution integral in the factorization formula. Large logarithms
entering the hard-scattering kernel are resummed by performing a two-step
perturbative matching onto the low-energy effective theory, and by solving
evolution equations derived from the renormalization properties of the
leading-order B-meson light-cone distribution amplitude. As a byproduct, the
evolution equation for heavy-collinear current operators in soft-collinear
effective theory is derived.


title:
Ultraviolet modifications of dispersion relations in effective field
  theory

abstract:
  The existence of a fundamental ultraviolet scale, such as the Planck scale,
may lead to modifications of the dispersion relations for particles at high
energies, in some scenarios of quantum gravity. We apply effective field theory
to this problem and identify dimension 5 operators that do not mix with
dimensions 3 and 4 and lead to cubic modifications of dispersion relations for
scalars, fermions, and vector particles. Further we show that, for electrons,
photons and light quarks, clock comparison experiments bound these operators at
10^{-5}/Mpl.


title: Positivity of QCD at asymptotic density

abstract:
  In this talk, I try to show that the sign problem of dense QCD is due to
modes whose frequency is higher than the chemical potential. An effective
theory of quasi-quarks near the Fermi surface has a positive measure in the
leading order. The higher-order corrections make the measure complex, but they
are suppressed as long as the chemical potential is sufficiently larger than
$\Lambda_{\rm QCD}$. As a consequence of the positivity of the effective
theory, we can show that the global vector symmetries except the U(1) baryon
number are unbroken at asymptotic density.


title: Investigation of light scalar resonances at COSY

abstract:
  The $a_0$(980) and $f_0$(980) resonances are two well established states in
the excited meson spectrum. We review the most prominent theoretical models
which try to explain the structure of these states. It is discussed whether
data from COSY on $a_0$ and $f_0$ production in $pp$, $pn$, $pd$ and $dd$
collisions allow to distinguish between the different approaches. Very
promising in this respect seems to be the measurement of the reaction $dd \to
(\mathrm{^4He} a_0^0 \to) \mathrm{^4He} \pi^0\eta$ which violates isospin
conservation and can be related to $a_0$-$f_0$ mixing.


title: Light Cone Current Algebra

abstract:
  This talk follows by a few months a talk by the same authors on nearly the
same subject at the Coral Gables Conference. The ideas presented here are
basically the same, but with some amplification, some change of viewpoint, and
a number of new questions for the future. For our own convenience, we have
transcribed the Coral Gables paper, but with an added ninth section, entitled
"Problems of light cone current algebra", dealing with our present views and
emphasizing research topics that require study.


title: What mediates the longest correlation length in the QCD plasma?

abstract:
  When thermal QCD crosses the critical temperature from below, its pressure
density rises drastically, consistent with the picture of deconfinement and the
release of partons as light degrees of freedom. On the other hand, the concept
of partons is a perturbative one, whereas interactions with the infrared modes
in the plasma always introduce non-perturbative contributions. Here I show how
partonic correlators can be defined in a gauge invariant and non-perturbative
manner which applies to all energy scales. In particular, I compute the
magnetic mass for hot SU(2) gauge theory and find $m_A=0.36(2)g^2T$, whose
inverse for large $T$ is the largest correlation length in the system.


title: Nucleon Strangeness in Dispersion Theory

abstract:
  Dispersion relations provide a powerful tool to describe the low-energy
structure of hadrons. We review the status of the strange vector form factors
of the nucleon in dispersion theory. We also comment on open questions and the
relation to chiral perturbation theory.


title: HTL-resummed thermodynamics of hot and dense QCD: An update

abstract:
  We review the proposal to resum the physics of hard thermal loops in the
thermodynamics of the quark-gluon plasma through nonperturbative expressions
for entropy and density obtained from a Phi-derivable two-loop approximation. A
comparison with the recently solved large-N_f limit of hot QCD is performed,
and some updates, in particular on quark number susceptibilities, are made.


title: SUSY Flavor Problem and Warped Geometry

abstract:
  We point out that supersymmetric warped geometry can provide a solution to
the SUSY flavor problem, while generating hierarchical Yukawa couplings. In
supersymmetric theories in a slice of AdS_5 with the Kaluza-Klein scale M_KK
much higher than the weak scale, if all visible fields originate from 5D bulk
fields and supersymmetry breaking is mediated by the bulk radion superfield
and/or some brane chiral superfields, potentially dangerous soft scalar masses
and trilinear $A$ parameters at M_KK can be naturally suppressed compared to
the gaugino masses by small warp factor. We present simple models yielding
phenomenologically interesting patterns of soft parameters in this framework.


title: Temporal distortion of annual modulation at low recoil energies

abstract:
  We show that the main features of the annual modulation of the signal
expected in a WIMP direct detection experiment, i.e. its sinusoidal dependence
with time, the occurrence of its maxima and minima during the year and (under
some circumstances) even the one-year period, may be affected by relaxing the
isothermal sphere hypothesis in the description of the WIMP velocity phase
space. The most relevant effect is a distortion of the time-behaviour at low
recoil energies for anisotropic galactic halos. While some of these effects
turn out to be relevant at recoil energies below the current detector
thresholds, some others could already be measurable, although some degree of
tuning between the WIMP mass and the experimental parameters would be required.
Either the observation or non-observation of these effects could provide clues
on the phase space distribution of our galactic halo.


title:
Emission of thermal photons and the equilibration time in Heavy-Ion
  collisions

abstract:
  The emission of hard real photons from thermalized expanding hadronic matter
is dominated by the initial high-temperature expansion phase. Therefore, a
measurement of photon emission in ultrarelativistic heavy-ion collisions
provides valuable insights into the early conditions realized in such a
collision. In particular, the initial temperature of the expanding fireball or
equivalently the equilibration time of the strongly interacting matter are of
great interest. An accurate determination of these quantities could help to
answer the question whether or not partonic matter (the quark gluon plasma) is
created in such collisions. In this work, we investigate the emission of real
photons using a model which is based on the thermodynamics of QCD matter and
which has been shown to reproduce a large variety of other observables. With
the fireball evolution fixed beforehand, we are able to extract limits for the
equilibration time by a comparison with photon emission data measured by WA98.


title: Nonequilibrium dynamics of the O(N) linear sigma model

abstract:
  We investigate the out-of-equilibrium evolution of a classical background
field and its quantum fluctuations in the scalar O(N) model with spontaneous
symmetry breaking. We consider the 2-loop 2PI effective action in the Hartree
approximation, i.e., including bubble resummation but without non-local
contributions to the Dyson-Schwinger equation. We concentrate on the
(nonequilibrium) phase structure of the model and observe a first-order
transition between a spontaneously broken and a symmetric phase at low and high
energy densities, respectively. So typical structures expected in thermal
equilibrium are encountered in nonequilibrium dynamics even at early times
before thermalization.


title: B->gamma e nu Transitions from QCD Sum Rules

abstract:
  B->gamma e nu transitions have recently been studied in the framework of QCD
factorization. The attractiveness of this channel for such an analysis lies in
the fact that, at least in the heavy quark limit, the only hadron involved is
the B meson itself, so one expects a very simple description of the form factor
in terms of a convolution of the B meson distribution amplitude with a
perturbative kernel. This description, however, does not include contributions
suppressed by powers of the b quark mass. In this letter, we calculate
corrections to the factorized expression which are induced by the ``soft''
hadronic component of the photon. We demonstrate that the power-suppression of
these terms is numerically not effective for physical values of the $b$ quark
mass and that they increase the form factor by about 30% at zero momentum
transfer. We also derive a sum rule for lambda_B, the first negative moment of
the B meson distribution amplitude, and find lambda_B = 0.6 GeV (to leading
order in QCD).


title: The Production and Decay of Heavy Dimesons

abstract:
  We show that it is necessary to go beyond a single hadron (beyond the
quark-antiquark or three-quark systems) in order to distinguish the colour
structure of the effective quark-quark interaction and the relevance of 3-body
forces. We critically discuss the proposed models which suggest the dimeson
bb\bar{u}\bar{d} to be bound by ~ 100 MeV and the cc\bar{u}\bar{d} dimeson to
be unbound. Only experiment can judge. We estimate the probability of producing
bb-\bar{u}\bar{d} at LHC by double gluon-gluon fusion and search for a
characteristic decay.


title:
Comparison of Different Boost Transformations for the Calculation of
  Form Factors in Relativistic Quantum Mechanics

abstract:
  The effect of different boost expressions, pertinent to the instant, front
and point forms of relativistic quantum mechanics, is considered for the
calculation of the ground-state form factor of a two-body system in simple
scalar models. Results with a Galilean boost as well as an explicitly covariant
calculation based on the Bethe-Salpeter approach are given for comparison. It
is found that the present so-called point-form calculations of form factors
strongly deviate from all the other ones. This suggests that the formalism
which underlies them requires further elaboration. A proposition in this sense
is made.


title: Heavy Quarks: Effective Theories, Lattice and Models

abstract:
  Heavy-light mesons, heavy quarkonium and doubly heavy baryons are briefly
discussed. Effective field theories (EFTs) of QCD based on the heavy quark mass
expansion 1/m_Q provide a unified framework to describe all three systems. They
produce a number of model-independent results and simplify non-perturbative
(lattice) calculations. Nevertheless, models are still very useful to obtain
inexpensive estimates of many observables.
  It is emphasized that certain models can be accommodated in the EFT
framework, like non-relativistic potential models for heavy quarkonium. It is
also outlined how to build a suitable EFT for doubly heavy baryons which might
also accommodate existing models for these systems. Finally, a few lattice
calculations which are badly needed as inputs for EFTs are pointed out.


title: A Remarkable Relation in the Gauge Sector of Electroweakdynamics

abstract:
  A precise empirical relation between the electromagnetic coupling alpha(m_Z)
and sin^2(theta^ell_{eff}) --where theta^ell_{eff} is the effective electroweak
mixing angle extracted from Z leptonic decays-- is made manifest: alpha(m_Z) =
sin^3(theta^ell_{eff})*cos(theta^\ell_{eff}}/(4\pi}.


title:
Prospects of detecting massive isosinglet neutrino at LHC in the CMS
  detector

abstract:
  A possibility to search for a heavy isosinglet (sterile) neutrino using its
decay mode $\nu_s \to l^{\pm} + 2 jets$ in the $S$ - channel production $pp \to
W^* + X \to l^{\pm}\nu_s + X$ in the CMS experiment is studied. The only
assumption about the heavy neutrino is its nonzero mixing with $\nu_e$ or
$\nu_{\mu}$. The corresponding CMS discovery potential expressed in terms of
the heavy neutrino mass and the mixing parameter between the heavy and light
neutrino is determined. It is shown that the heavy neutrino with a mass up to
800 $GeV$ could be detected in CMS. We also investigate the production of the
heavy neutrino $N_l$ mixed with $\nu_e$ and/or $\nu_{\mu}$ in the $SU_C(3)
\otimes SU_L(2) \otimes SU_R(2)\otimes U(1)$ model through the reaction $pp \to
W_R + X \to l^{\pm}N_l + X$ with the same heavy neutrino decay channel as
above. We find that for $M_{W_R} < 3 TeV$ it is possible to discover the heavy
neutrino with a mass up to $0.75 \cdot M_{W_R}$.


title: Counting Rule for Hadronic Light-Cone Wave Functions

abstract:
  We introduce a systematic way to write down the Fock components of a hadronic
light-cone wave function with $n$ partons and orbital angular momentum
projection $l_z$. We show that the wave function amplitude
$\psi_n(x_i,k_{i\perp},l_{zi})$ has a leading behavior
$1/(k^2_\perp)^{[n+|l_z|+{\rm min}(n'+|l_z'|)]/2-1}$ when all parton transverse
momenta are uniformly large, where $n'$ and $l_z'$ are the number of partons
and orbital angular momentum projection, respectively, of an amplitude that
mixes under renormalization. The result can be used as a constraint in modeling
the hadronic light-cone wave functions. We also derive a generalized counting
rule for hard exclusive processes involving parton orbital angular momentum and
hadron helicity flip.


title:
SUSY QCD corrections to the polarization and spin correlations of top
  quarks produced in e+e- collisions

abstract:
  We compute the supersymmetric QCD corrections to the polarization and the
spin correlations of top quarks produced above threshold in e+e- collisions,
taking into account arbitrary longitudinal polarization of the initial beams.


title:
The QCD Phase Diagram at Nonzero Temperature, Baryon and Isospin
  Chemical Potentials in Random Matrix Theory

abstract:
  We introduce a random matrix model with the symmetries of QCD at finite
temperature and chemical potentials for baryon number and isospin. We analyze
the phase diagram of this model in the chemical potential plane for different
temperatures and quark masses. We find a rich phase structure with five
different phases separated by both first and second order lines. The phases are
characterized by the pion condensate and the chiral condensate for each of the
flavors. In agreement with lattice simulations, we find that in the phase with
zero pion condensate the critical temperature depends in the same way on the
baryon number chemical potential and on the isospin chemical potential. At
nonzero quark mass, we remarkably find that the critical end point at nonzero
temperature and baryon chemical potential is split in two by an arbitrarily
small isospin chemical potential. As a consequence, there are two crossovers
that separate the hadronic phase from the quark-gluon plasma phase at high
temperature. Detailed analytical results are obtained at zero temperature and
in the chiral limit.


title: New Physics and novel Higgs signals

abstract:
  We review some of the results of our recent work dealing with the novel type
of Higgs signals that arise when one considers extensions of the standard
model.
  We discuss first possible deviations on the Higgs couplings due to heavy
particles, in the context of the MSSM and with large extra-dimensions. Then, we
present several models where it is possible to induce flavor violating Higgs
couplings, and probe them at future hadron colliders through the LFV Higgs
decay h-> tau mu or with rare top decays.


title:
Quantum states of neutrons in the gravitational field and limits for
  non-Newtonian interaction in the range between 1 micron and 10 microns

abstract:
  Quantum states in the Earth's gravitational field can be observed, when
ultra-cold neutrons fall under gravity. In an experiment at the Institut
Laue-Langevin in Grenoble, neutrons are reflected and trapped in a
gravitational cavity above a horizontal mirror. The population of the ground
state and the lowest states follows, step by step, the quantum mechanical
prediction. An efficient neutron absorber removes the higher, unwanted states.
The quantum states probe Newtonian gravity on the micrometer scale and we place
limits for gravity-like forces in the range between 1 micron and 10 microns.


title: Aspects of the Heavy-Quark Photoproduction in the Semihard Approach

abstract:
  In this contribution we report on the calculations of heavy-quark
photoproduction using the semihard approach, emphasizing the results obtained
with the phenomenological saturation model.


title: Charge Symmetry Violating Contributions to Neutrino Reactions

abstract:
  The NuTeV group has measured charged and neutral current reactions for
neutrinos on iron targets. Ratios of these cross sections provide an
independent measurement of the Weinberg angle. The NuTeV value for sin^2
theta_W is three standard deviations larger than the value measured in other
electroweak processes. By reviewing theoretical estimates of parton charge
symmetry violation (CSV), we study CSV contributions to the NuTeV measurement.
We conclude that charge symmetry violating effects should remove roughly 30% of
the discrepancy between the NuTeV result and other determinations of sin^2
theta_W.


title: Heavy-to-light form factors of B decays at large recoil

abstract:
  The form factors of $B\to\pi(\rho)$ decays are analyzed using the light-cone
sum rules in the framework of the soft-collinear effective theory (SCET). We
establish the sum rules for the leading and the next-to-leading order (NLO)
nonperturbative functions of the SCET. Explicit calculation shows that
(leading)+(NLO) $\sim 1/E^2+1/E^3$, where $E$ is the large recoiling energy.
The results are compatible with the literatures. Also the validity of this
hybrid formalism is discussed.


title:
Emission of polarized photons from unpolarized electrons moving in
  crystals

abstract:
  Radiation emitted by unpolarized high-energy electrons penetrating crystals
may be linearly polarized. This occurs when the particle velocity makes an
angle, with respect to some major crystal axis, being sufficiently larger than
the axial-channelling angle. For such orientation, a complete description of
spectral and polarization characteristics of the radiation is derived. At
planar channelling, a non-perturbative contribution to the probability of the
process appears caused by the plane field, and we must solve exactly a
one~-~dimensional mechanical problem. For that, the approximate form of the
actual plane potential is suggested which provides a precise fit for any
crystal plane and an analytical solution to the motion problem. In a practical
case, we must consider electron-photon showers developing in sufficiently thick
crystals. For the first time, this development is described taking into account
the polarization of photons. We discuss qualitative features of the phenomenon,
present results of numerical calculations for thin and thick crystals, and
evaluate the possibility of the use of differently oriented crystals in a
polarized hard photon source.


title: On asymmetric Chern-Simons number diffusion

abstract:
  We show that CP-violation can lead to an asymmetric diffusion of the
Chern-Simons number in thermal equilibrium. This asymmetry leads to a linearly
growing expectation value of the third power of the Chern-Simons number. In the
long-time limit all expectation values of powers of Chern-Simon numbers are
determined by their appropriate disconnected parts.


title:
Heavy mass expansion, light-by-light scattering and the anomalous
  magnetic moment of the muon

abstract:
  Contributions from light-by-light scattering to (g_\mu-2)/2, the anomalous
magnetic moment of the muon, are mediated by the exchange of charged fermions
or scalar bosons. Assuming large masses M for the virtual particles and
employing the technique of large mass expansion, analytical results are
obtained for virtual fermions and scalars in the form of a series in (m_\mu
/M)^2. This series is well convergent even for the case M=m_\mu. For virtual
fermions, the expansion confirms published analytical formulae. For virtual
scalars, the result can be used to evaluate the contribution from charged
pions. In this case our result confirms already available numerical
evaluations, however, it is significantly more precise.


title:
Spin-5/2 resonance effects in a coupled channel nucleon resonance
  analysis

abstract:
  Spin-$\ffh$ resonance contributions in pion-nucleon scattering are
investigated within the coupled channel $K$-matrix approach for c.m. energies
up to $\sqrt s=$ 2 GeV. All previously studied $\pi N$, $2\pi N$, $\eta N$, $K
\Lambda$, $K \Sigma$, and $\omega N$ final states are included. We find a
significant improvement of $\chi^2$ in almost all channels by inclusion of the
spin-$\ffh$ states. The obtained coupling parameters are discussed.


title:
The anomalous lepton magnetic moment, LFV decays and the fourth
  generation

abstract:
  We investigate the lepton flavor violation (LFV) decays, $\tau\to l\gamma$
($l=\mu, e$) and $\mu\to e\gamma$, and the newly observed muon $g-2$ anomaly in
the framwork of a squential fourth generation model with a heavy fourth
neutrino, $\nu'$. By using the recent experimental bounds, we take the
constraints of the $4\times 4$ leptonic mixing matrix element factors,
$|V_{1\nu'} V_{2\nu'}|^2$, $|V_{1\nu'} V_{3\nu'}|^2 $ and $|V_{3\nu'}
V_{2\nu'}|^2$. We find that LFV decays and $g_\mu -2$ can exclude most of the
parameter space of the 4th generation neutrino mass $m_{\nu'}$ and give
stringent constraints on the existence of the fourth generation.


title:
What can we learn from $B^{+}\to D^{(*)-}_{s} K^{+} \pi^{+}$, $B_{d}\to
  D_{s}^{(*)-} K^{0} \pi^{+}$ and $B_{d}\to D_{s}^{(*)-} K^{*+}$ decays?

abstract:
  We study the nonresonant three-body decays of $B^{+}\to D^{(*)-}_{s} K^{+}
\pi^{+}$ and $B_{d}\to D_{s}^{(*)-} K^{0} \pi^{+}$. We find that these decays
can provide the information on the time-like form factors of $D^{(*)}_{s} K$.
We also explicitly investigate $B_{d}\to D_{s}^{(*)-} K^{*+}$ decays by
discriminating the nonresonant contributions with the unknown $D^{(*)}_{s}$
wave functions being fixed by the measured mode of $B_{d}\to D_{s}^{-} K^{+}$.


title: Diffractive Photoproduction of Eta_c

abstract:
  Diffractive photoproduction of $\eta_c$ is an important process to study the
effect of Odderon, whose existence is still not confirmed in experiment. A
detailed interpretation of Odderon in QCD, i.e., in terms of gluons is also
unclear.Taking charm quarks as heavy quarks, we can use NRQCD and take $\eta_c$
as a $c\bar c$ bound state. Hence, in the production of $\eta_c$a free $c\bar
c$ pair is first produced and this pair is transformed into $\eta_c$
subsequently.In the forward region of the kinematics, the $c\bar c$ pair
interacts with initial hadron through exchanges of soft gluons. This
interaction can be studied with HQET, which provides a systematic expansion in
the inverse of the $c$-quark mass $m_c$. We find that the calculation of the
$S$-matrix element in the forward region can be formulated as the problem of
solving a wave function of a $c$-quark propagating in a background field of
soft gluons. At leading order we find that the differential cross-section can
be expressed with four functions, which are defined with a twist-3 operator of
gluons. The effect of exchanging a Odderon can be identified with this operator
in our case. We discuss our results in detail and compare them with those
obtained in previous studies. Our results and those from other studies show
that the differential cross-section is very small in the forward region. We
also show that the production through photon exchange is dominant in the
extremely forward region, hence the effect of Odderon exchange can not be
identified in this region.For completeness we also give results for diffractive
photoproduction of $J/\Psi$.


title: Deep inelastic scattering and "elastic" diffraction

abstract:
  We examine the total cross section of virtual photons on protons,
$\sigma_{\gamma^* p}(W^2,Q^2)$, at low $x \cong Q^2/W^2 \ll 1$ and its
connection with ``elastic'' diffractive production $\gamma^*_{T,L}p \to
X^{J=1}_{T,L} p$ in the two-gluon exchange dynamics for the virtual forward
Compton scattering amplitude. Solely based on the generic structure of
two-gluon exchange, we establish that the cross section is described by the
(imaginary part of the) amplitude for forward scattering of $q \bar q$ vector
states, $(q \bar q)^{J=1}_{T,L} p \to (q \bar q)^ {J=1}_{T,L} p$. The
generalized vector dominance/color dipole picture (GVD/CDP) is accordingly
established to only rest on the two-gluon-exchange generic structure. This is
explicitly seen by the sum rules that allow one to directly relate the total
cross section to the cross section for elastic diffractive forward production,
$\gamma^*_{T,L} p\to (q \bar q)^{J=1}_{T,L} p$, of vector states.


title: How to detect the cosmic neutrino background?

abstract:
  A measurement of the big bang relic neutrinos would open a new window to the
early universe. We review various possibilities to detect this cosmic neutrino
background and substantiate the assertion that -- apart from the rather
indirect evidence to be gained from cosmology and large-scale structure
formation -- the annihilation of ultrahigh energy cosmic neutrinos with relic
anti-neutrinos (or vice versa) on the Z-resonance is a unique process having
sensititivy to the relic neutrinos, if a sufficient flux at E^res_{nu_i} =
M_Z^2/(2 m_{nu_i}) = 4 x 10^{22} eV (0.1 eV/m_{nu_i}) exists. The associated
absorption dips in the ultrahigh energy cosmic neutrino spectrum may be
searched for at forthcoming neutrino and air shower detectors. The associated
protons and photons may have been seen already in form of the cosmic ray events
above the Greisen-Zatsepin-Kuzmin cutoff.


title: Quantum corrections to Boltzmann equations

abstract:
  Because of IR (pinch) singularities a resummation is necessary in
non-equilibrium field theories, that can be performed by using Kadanoff--Baym
equations. Taking Landau prescription correctly into account, Kadanoff--Baym
equations reduce to Boltzmann equations only in a restricted kinematical range;
in other cases a new equation (the former constraint equation) has to be
considered. In relaxation time approximation this new equation results in the
shifting and smearing of multiparticle thresholds.


title: Kaon decays and the flavour problem

abstract:
  After a brief introduction to the so-called flavour problem, we discuss the
role of rare K decays in probing the mechanism of quark-flavour mixing.
Particular attention is devoted to the formulation of the Minimal Flavour
Violation hypothesis, as a general and natural solution to the flavour problem,
and to the fundamental role of K -> pi nu nu-bar decays in testing this
scenario.


title:
CP-violating asymmetry in $B^- \to \pi^+ \pi^- K^-$ and $B^- \rarr K^+
  K^- K^-$ decays

abstract:
  The recent Belle and Babar measurements of the branching ratios $B^- \to
\pi^+ \pi^- K^-$ and $B^- \to K^+ K^- K^-$ and $B^\pm \to \chi_{c0} K^\pm$ have
renewed interests in these decays as another mean to look for direct CP
violation in B decays. In this talk, I would like to discuss a recent analysis
of the CP violating asymmetry in the partial widths for the decays $B^- \to
\pi^+ \pi^- K^-$ and $B^- \to K^+ K^- K^-$, which results from the interference
of the non resonant amplitude with the resonant amplitude $B^\pm \to \chi_{c0}
K^\pm $ $ \rarr\pi^+ \pi^- K^\pm $ and $B^\pm \to \chi_{c0} K^\pm$ $ \to K^+
K^- K^\pm$. For $\gamma \simeq 58^o$ we predict that the partial width
asymmetry could reach 10% for the $B^- \to \pi^+ \pi^- K^-$ decay and 16% for
the $B^- \to K^+ K^- K^-$decay.


title: The LMA solar solution and fermion universality

abstract:
  We suggest that the Large Mixing Angle MSW solar solution, whose unique
physical status is confidently supported by the recent results from KamLAND
experiments, gets its justification in the fermion universality, interpreted
for neutrinos and charged leptons in a straightforward way, most readily in the
framework of seesaw mechanism. To this end, we consider an explicit seesaw
model, where Dirac and (righthanded) Majorana neutrino masses are
simultaneously measurable, and {\it both} are conjectured to be proportional to
charged-lepton masses. However, the LMA solar solution is {\it also} not
inconsistent with the simple option, where neutrinos are Dirac particles
carrying masses proportional to those of charged leptons.


title: Anisotropic Color Superconductivity

abstract:
  We discuss the possibility that in finite density QCD an anisotropic phase is
realized. This case might arise for quarks with different chemical potential
and/or different masses. In this phase crystalline structures may be formed. We
consider this possibility and we describe, in the context of an effective
lagrangian, the corresponding phonons as the Nambu-Goldstone bosons associated
to the breaking of the space symmetries.


title: Yukawa Textures and Anomaly Mediated Supersymmetry Breaking

abstract:
  We present a detailed analysis of how a mixed-anomaly-free U(1) symmetry can
be used to both resolve the slepton mass problem associated with Anomaly
Mediated Supersymmetry Breaking and generate the fermion mass hierarchy via the
Froggatt-Nielsen mechanism. Flavour changing neutral currents problems are
evaded by a specific form of the Yukawa textures.


title: Analytic calculation of Bose-Einstein correlations at LEP1 and LEP2

abstract:
  Theoretical results in the tau-model are discussed in the context of
Bose-Einstein correlations in e+e- annihilations at LEP1 and LEP2 as well as
that of relativistic heavy ion collisions at SPS and RHIC.


title:
Testing QCD factorisation and charming penguins in charmless
  ${\boldsymbol{B\to PV}}$

abstract:
  We try a global fit of the experimental branching ratios and CP-asymmetries
of the charmless $B\to PV$ decays according to QCD factorisation. We find it
impossible to reach a satisfactory agreement, the confidence level (CL) of the
best fit is smaller than .1 %.
  The main reason for this failure is the difficulty to accomodate several
large experimental branching ratios of the strange channels. Furthermore,
experiment was not able to exclude a large direct CP asymmetry in $\bar
{B^0}\to\rho^+ \pi^-$, which is predicted very small by QCD factorisation.
Trying a fit with QCD factorisation complemented by a charming-penguin inspired
model we reach a best fit which is not excluded by experiment (CL of about 8 %)
but is not fully convincing.
  These negative results must be tempered by the remark that some of the
experimental data used are recent and might still evolve significantly.


title:
Prospects of Detecting Massive Charged Higgs from Hadronic Decay H -> tb
  in CMS

abstract:
  The possibility to detect the massive charged Higgs boson H using the
hadronic decay channel H -> tb in the associated production pp -> tH + X in the
CMS experiment at LHC is studied. There is a large background from ttbb events
which makes the observation difficult. Detection of a Higgs signal in this
channel requires an excellent b-tagging performance. Good calorimeter mass
resolution is also necessary for the full event reconstruction.


title: New Relations for Excited Baryons in Large N_c QCD

abstract:
  We show that excited baryons in large N_c QCD form multiplets, within which
masses are first split at O(1/N_c). The dominant couplings of resonances to
various mesons are highly constrained: The N(1535) decays at leading 1/N_c
order exclusively to eta-N rather than pi-N, and vice versa for the N(1650).
This multiplet structure is reproduced by a simple large N_c quark model, well
studied in the literature, that describes resonances as single-quark
excitations.