title:
Two-Loop Helicity Amplitudes for Gluon-Gluon Scattering in QCD and
  Supersymmetric Yang-Mills Theory

abstract:
  We present the two-loop helicity amplitudes for the scattering of two gluons
into two gluons in QCD, which are relevant for next-to-next-to-leading order
corrections to jet production at hadron colliders. We give the results in the
`t Hooft-Veltman and four-dimensional helicity variants of dimensional
regularization. Summing our expressions over helicities and colors, and
converting to conventional dimensional regularization, gives results in
complete agreement with those of Glover, Oleari and Tejeda-Yeomans. We also
present the amplitudes for 2 to 2 scattering in pure N=1 supersymmetric
Yang-Mills theory.


title:
Towards the realistic fermion masses with a single family in extra
  dimensions

abstract:
  In a class of multidimensional models, topology of a thick brane provides
three chiral fermionic families with hierarchical masses and mixings in the
effective four-dimensional theory, while the full model contains a single
vector-like generation. We carry out numerical simulations and reproduce all
known Standard Model fermion masses and mixings in one of these models.


title: Strong acoustic turbulence and the speed of Bose-Einstein condensation

abstract:
  The final stage of Bose-Einstein condensation in a large volume occurs
through coarsening--growth of individual correlated patches. We present
analytical arguments and numerical evidence that in the momentum space this
growth corresponds to strong turbulence of the particle number, with a
turbulent cascade towards the infrared and the power law $n(k) \propto
k^{-(d+1)}$ in $d=2,3$ spatial dimensions. As a corollary, we find that the
correlation length grows linearly in time, with the speed of order of the speed
of Bogoliubov's quasiparticles (phonons). We use these results to estimate the
speed of BEC in atomic vapors and in galactic dark matter.


title: Unitarity of Deconstructed Five-Dimensional Yang-Mills Theory

abstract:
  The low-energy properties of a compactified five-dimensional gauge theory can
be reproduced in a four-dimensional theory with a replicated gauge group and an
appropriate gauge symmetry breaking pattern. The lightest vector bosons in
these "deconstructed" or "remodeled" theories have masses and couplings
approximately equal to those of the Kaluza-Klein tower of massive vector states
present in a compactified higher-dimensional gauge theory. We analyze the
unitarity of low-energy scattering of the massive vector bosons in a
deconstructed theory, and examine the relationship between the scale of
unitarity violation and the scale of the underlying chiral symmetry breaking
dynamics which breaks the replicated gauge groups. As in the case of
compactified five-dimensional gauge theories, low-energy unitarity is ensured
through an interlacing cancellation among contributions from the tower of
massive vector bosons. We show that the behavior of these scattering amplitudes
is manifest without such intricate cancellations in the scattering of the
would-be Goldstone bosons of the deconstructed theory. Unlike compactified
five-dimensional gauge theories, the amplitude for longitudinal vector boson
scattering in deconstructed theories does grow with energy, though this effect
is suppressed by 1/(N+1), with N+1 being the number of replicated gauge groups.


title: Hadron Spin Dynamics

abstract:
  Spin effects in exclusive and inclusive reactions provide an essential new
dimension for testing QCD and unraveling hadron structure. Remarkable new
experiments from SLAC, HERMES (DESY), and the Jefferson Laboratory present many
challenges to theory, including measurements at HERMES and SMC of the single
spin asymmetries in pion electroproduction, where the proton is polarized
normal to the scattering plane. This type of single spin asymmetry may be due
to the effects of rescattering of the outgoing quark on the spectators of the
target proton, an effect usually neglected in conventional QCD analyses. Many
aspects of spin, such as single-spin asymmetries and baryon magnetic moments
are sensitive to the dynamics of hadrons at the amplitude level, rather than
probability distributions. I illustrate the novel features of spin dynamics for
relativistic systems by examining the explicit form of the light-front
wavefunctions for the two-particle Fock state of the electron in QED, thus
connecting the Schwinger anomalous magnetic moment to the spin and orbital
momentum carried by its Fock state constituents and providing a transparent
basis for understanding the structure of relativistic composite systems and
their matrix elements in hadronic physics. I also present a survey of
outstanding spin puzzles in QCD, particularly the double transverse spin
asymmetry A_{NN} in elastic proton-proton scattering, the J/psi to rho-pi
puzzle, and J/psi polarization at the Tevatron.


title:
Possible Evidence of Disoriented Chiral Condensates from the Anomaly in
  Omega and AntiOmega Abundances at the SPS

abstract:
  No conventional picture of nucleus-nucleus collisions has yet been able to
explain the abundance of Omega and AntiOmega in central collisions between Pb
nuclei at 158 A GeV at the CERN SPS. We argue that such a deviation from
predictions of statistical thermal models and numerical simulations is evidence
that they are produced as topological defects in the form of skyrmions arising
from the formation of disoriented chiral condensates. The estimated domain size
falls in the right range to be consistent with the so far non-observation of
DCC from the distribution of neutral pions.


title:
Probing the Electroweak Symmetry Breaking Mechanism at High Energy
  Colliders

abstract:
  We briefly review the recent developments of probing the electroweak symmetry
breaking mechanism at high energy colliders such as the CERN LEP2, the Fermilab
Tevatron, the CERN LHC and the e(+)e(-) linear colliders. Both weakly
interacting and strongly interacting electroweak symmetry breaking mechanisms
are concerned.


title: $D \to \pi\pi$ decays with Final State Interactions

abstract:
  We study $D \to \pi\pi$ decays with final state interactions considered in
one-particle-exchange method. A clear physical picture for final state
interactions based on quark and hadronic level diagrams is presented. A strong
phase is introduced for hadronic effective couplings, which is crucial for
explaining the experimental data of $D^+\to \pi^+\pi^0$, $D^0\to \pi^+\pi^-$,
and $D^0\to \pi^0\pi^0$. Rescattering effects between different $D$ decay
channels are usually large. They are important for obtaining correct branching
ratios for $D\to \pi\pi$ decays in theoretical calculation.


title: {Probing Colour Separate States in $e^+ e^-$ annihilation at $Z^0$ pole

abstract:
  Hadronic events in $e^+ e^- \to Z^0$ are generated by a Monte-Carlo model
including the production of colour separate states. These events are compared
with those produced by the JETSET with default set of parameters where the
colour connections are colour singlet chains. By selecting two-jet-like events
and a sensitive observable, we find that these two kinds of colour connections
lead to significant differences in the hadronic states.


title: Chiral Lagrangian with confinement from the QCD Lagrangian

abstract:
  An effective Lagrangian for the light quark in the field of a static source
is derived systematically using the exact field correlator expansion. The
lowest Gaussian term is bosonized using nonlocal colorless bosonic fields and a
general structure of effective chiral Lagrangian is obtained containing all set
of fields. The new and crucial result is that the condensation of scalar
isoscalar field which is a usual onset of chiral symmetry breaking and is
constant in space-time, assumes here the form of the confining string and
contributes to the confining potential, while the rest bosonic fields describe
mesons with the q\bar q quark structure and pseudoscalars play the role of
Nambu-Goldstone fields. Using derivative expansion the effective chiral
Lagrangian is deduced containing both confinement and chiral effects for
heavy-light mesons. The pseudovector quark coupling constant is computed to be
exactly unity in the local limit,in agreement with earlier large N_c arguments.


title: The lightest scalar nonet

abstract:
  First I review some previous work on the lightest scalars below 1.5 GeV, and
how these scalars can be understood as unitarized nonet states. The bare
scalars are strongly distorted by hadronic mass shifts, and the lightest I=0
state becomes a very broad resonance of mass and width of about 500 MeV.
  This is the sigma meson required by models based on linear realization of
chiral symmetry. Recently the light sigma has clearly been observed in D decay
to 3 pions by the E791 experiment at Fermilab and I discuss how this decay
channel can be predicted in a Constituent Quark Meson Model, which incorporates
heavy quark and chiral symmetries.
  At the end I discuss the likely possibility that there are in fact two light
scalar nonets, such as one mainly meson-meson (or 4-quark) nonet and one qq bar
nonet. I point out that an interesting approximate description of this could be
modelled by starting with two coupled linear sigma models. After gauging the
overall symmetry one of these could be looked upon as the "Higgs sector of
strong interactions", and the lightest scalar nonet becomes the corresponding
Higgs nonet.


title:
Experimental tests of curvature couplings of Fermions in General
  Relativity

abstract:
  Spin 1/2 particles in geodesic trajectories experience no gravitational
potential but they still have non-zero couplings to the curvature tensor. The
effect of space time curvature on fermions can be parameterized by a vector and
a pseudo-vector potential. These apparent CPT violating terms can be measured
with satellite based spin-polarized torsion balance and clock comparison
experiments. The Earth's curvature effect is of the order of 10^{-37} Gev which
is not far from the present bounds of ~10^{-29} Gev on such CPT violating
couplings.


title: Vacuum replicas in QCD

abstract:
  The properties of the vacuum are addressed in the two- and four-dimensional
quark models for QCD. It is demonstrated that the two-dimensional QCD ('t Hooft
model) possesses only one possible vacuum state - the solution to the mass-gap
equation, which provides spontaneous breaking of the chiral symmetry (SBCS). On
the contrary, the four-dimensional theory with confinement modeled by the
linear potential supplied by the Coulomb OGE interaction, not only has the
chirally-noninvariant ground vacuum state, but it possesses an excited vacuum
replica, which also exhibits SBCS and can realize as a metastable intermediate
state of hadronic systems. We discuss the influence of the latter on physical
observables as well as on the possibility to probe the vacuum background fields
in QCD.


title:
Flavour-symmetry breaking of the quark condensate and chiral corrections
  to the Gell-Mann-Oakes-Renner relation

abstract:
  The relation between the chiral quark condensate in QCD sum rules and chiral
perturbation theory is clarified with the help of a low-energy theorem for the
scalar and pseudoscalar correlation functions. It is found that the quark
condensate should be identified with the non-normal-ordered vacuum expectation
value of quark-antiquark fields. Utilising results on flavour SU(3) breaking of
the quark condensate from QCD sum rules, the unphysical low-energy constant
H_2^r in the chiral Lagrangian, as well as next-to-leading order corrections to
the Gell-Mann-Oakes-Renner relation are estimated.


title: Strange sea asymmetry in nucleons

abstract:
  We evaluate the medium effects in nucleon which can induce an asymmetry of
the strange sea. The short-distance effects determined by the weak interaction
can give rise to $\delta m\equiv \Delta m_s-\Delta m_{\bar s}$ where $\Delta
m_{s(\bar s)}$ is the medium-induced mass of strange quark by a few KeV at
most, but the long-distance effects by strong interaction could be sizable.


title: Predictive Schemes for Bimaximal Neutrino Mixings

abstract:
  We present simple and predictive scenarios for neutrino masses which lead to
a bimaximal pattern of mixings that apparently provides the best fit to the
current solar and atmospheric neutrino data. It is shown that an approximate
global L_e-L_\mu-L_\tau symmetry, broken only by Planck scale effects, can
naturally explain the bimaximal mixing pattern. In one scenario, the solar
neutrino oscillation parameters are induced entirely through radiative
renormalization group effects. A one parameter model describing all neutrino
data is presented, which predicts U_{e3} = \sqrt{m_e/m_\tau} \simeq 0.017. A
second two parameter scheme predicts U_{e3} to be vanishingly small. We also
show how these scenarios can be extended to accommodate the LSND observations
within a 3+1 neutrino oscillation scheme by including a mirror sector of
particles and forces.


title: Run Scenarios for the Linear Collider

abstract:
  Scenarios are developed for runs at a Linear Collider, in the case that there
is a rich program of new physics.


title:
Particle Astrophysics and Cosmology: Cosmic Laboratories for New Physics
  (Summary of the Snowmass 2001 P4 Working Group)

abstract:
  The past few years have seen dramatic breakthroughs and spectacular and
puzzling discoveries in astrophysics and cosmology. In many cases, the new
observations can only be explained with the introduction of new fundamental
physics. Here we summarize some of these recent advances. We then describe
several problem in astrophysics and cosmology, ripe for major advances, whose
resolution will likely require new physics.

categories: hep-ph astro-ph hep-ex hep-th nucl-ex nucl-th


title:
Recoil Order Chiral Corrections to Baryon Octet Axial Currents and Large
  $N_c$ QCD

abstract:
  We compute the chiral corrections to octet baryon axial currents through
${\cal O}(p^3)$ in heavy baryon chiral perturbation theory, including both
octet and decuplet baryon intermediate states. We include the latter in a
consistent way by using the small scale expansion. We find that, in contrast to
the situation at ${\cal O}(p^2)$, there exist no cancellations between octet
and decuplet contributions at ${\cal O}(p^3)$. Consequently, the ${\cal
O}(p^3)$ corrections spoil the expected scaling behavior of the chiral
expansion. We discuss this result in terms of the $1/N_c$ expansion. We also
consider the implications for determination of the strange quark contribution
to the nucleon spin from polarized deep inelastic scattering data.


title: Threshold Top Quark Production

abstract:
  Predictions for the total cross section for e+e- -> t tbar near threshold are
reviewed. The renormalization group improved results at NNLL order have
improved convergence and reduced scale dependence relative to fixed order
results at NNLO. Prospects for measurements of the top-quark mass, width, and
Yukawa coupling are discussed.


title:
Semi-inclusive large-$p_T$ light hadron pair production as a probe of
  polarized gluons

abstract:
  We propose a new formula for extracting the polarized gluon distribution
$\Delta g$ in the proton from the large--$p_T$ light hadron pair production in
deep inelastic semi-inclusive reactions. Though the process dominantly occurs
via photon--gluon fusion(PGF) and QCD Compton, we can remove an effect of QCD
Compton from the combined cross section of light hadron pair production by
using symmetry relation among fragmentation functions and thus, rather clearly
extract information of $\Delta g$.


title: Symmetries, Variational Principles and Quantum Dynamics

abstract:
  The role of symmetries in formation of quantum dynamics is discussed. A
quantum version of the d'Alambert's principle is proposed to take into account
symmetry constrains for quantum case. It is noted that in this approach one can
find, in four space-time dimensions, the free of divergences quantum field
theory.


title:
Improved analysis for the baryon masses to order Lambda_{QCD}/m_Q from
  QCD sum rules

abstract:
  We use the QCD sum rule approach to calculate the masses of the Lambda_Q and
Sigma_Q baryons to the Lambda_{QCD}/m_Q order within the framework of heavy
quark effective theory. We compare the direct approach and the covariant
approach to this problem. Two forms of currents have been adopted in our
calculation and their effects on the results are discussed. Numerical results
obtained in both direct and covariant approaches are presented. The splitting
between spin 1/2 and 3/2 doublets derived from our calculation is
{\Sigma_Q^*}^2-\Sigma_Q^2\simeq 0.35\pm 0.03 GeV^2 which is in good agreement
with the experiment.


title: Observational Limits on Quantum Geometry Effects

abstract:
  Using a form of modified dispersion relations derived in the context of
quantum geometry, we investigate limits set by current observations on
potential corrections to Lorentz invariance. We use a phenomological model in
which there are separate parameters for photons, leptons, and hadrons.
Constraints on these parameters are derived using thresholds for the processes
of photon stability, photon absorption, vacuum Cerenkov radiation, pion
stability, and the GZK cutoff. Although the allowed region in parameter space
is tightly constrained, non-vanishing corrections to Lorentz symmetry due to
quantum geometry are consistent with current astrophysical observations.


title:
Affleck-Dine baryogenesis and the Q-ball dark matter in the
  gauge-mediated SUSY breaking

abstract:
  We consider the Affleck-Dine baryogenesis comprehensively in the minimal
supersymmetric standard model with gauge-mediated supersymmetry breaking.
Considering the high temperature effects, we see that the Affleck-Dine field is
naturally deformed into the form of the Q ball. In the natural scenario where
the initial amplitude of the field and the A-terms are both determined by the
nonrenormalizable superpotential, we obtain a narrow allowed region in the
parameter space in order to explain the baryon number and the dark matter of
the universe simultaneously. Therefore, the Affleck-Dine baryogenesis is
successful, although difficult.


title:
Neutrino bimaximal mixing and unitary deformation of fermion
  universality

abstract:
  An effective texture is presented for six Majorana neutrinos, three active
and three (conventional) sterile, based on a 6x6 mass matrix whose 3x3 Dirac
component (i.e., active--sterile component) is conjectured to get a
hierarchical fermion universal form, similar to the previously constructed 3x3
mass matrices for charged leptons as well as for up and down quarks. However,
for neutrinos this form becomes unitarily deformed by the action of bimaximal
mixing, specific in their case. The 3x3 lefthanded and righthanded components
(i.e., active-active and sterile-sterile components) of the 6x6 mass matrix are
diagonal with degenerate entries of opposite sign. They dominate over the 3x3
Dirac component. In such a texture the neutrino masses are $ m_1 = -m_4 \simeq
m_2 = -m_5 \simeq m_3 = -m_6 $ with the mass-squared differences $\Delta
m^2_{21} \ll \Delta m^2_{32} \simeq \Delta m^2_{31}$ and $\Delta m^2_{41} =
\Delta m^2_{52} = \Delta m^2_{63} = 0$. The last equality implies in our
texture the absence of oscillations for three (conventional) sterile neutrinos.
Thus, these neutrinos are here effectively decoupled, what is realized
evidently in another way than through the popular seesaw mechanism. There
remain the oscillations of three active neutrinos, getting the form as for
bimaximal mixing, but with the mass spectrum following from our texture.


title: Some problems of the pQCD jet calculus

abstract:
  Some problems of the perturbative quantum chromodynamics (pQCD) jet calculus
are discussed. The first one is related to the terminology of the order of
calculation. Due to cancelation of LO and NLO terms in the ratio of mean
multiplicities in gluon and quark jets $r$ the nowadays obtained results about
it should be called as 4NLO approximation. The second problem reveals itself in
calculations where corrections to some values (in particular, to $r'$) are
larger at present energies than lower order terms. Some characteristics which
do not suffer from this deficiency are proposed. Next problem lies in
interpretation of the negative values of cumulant moments which are considered
as an indication to the replacement of attraction by repulsion in sets with
definite particle contents. Finally, the problem of the generalization of QCD
equations for generating functions is briefly discussed.


title: The General Theory of Quantum Field Mixing

abstract:
  We present a general theory of mixing for an arbitrary number of fields with
integer or half-integer spin. The time dynamics of the interacting fields is
solved and the Fock space for interacting fields is explicitly constructed. The
unitary inequivalence of the Fock space of base (unmixed) eigenstates and the
physical mixed eigenstates is shown by a straightforward algebraic method for
any number of flavors in boson or fermion statistics. The oscillation formulas
based on the nonperturbative vacuum are derived in a unified general
formulation and then applied to both two and three flavor cases. Especially,
the mixing of spin-1 (vector) mesons and the CKM mixing phenomena in the
Standard Model are discussed emphasizing the nonperturbative vacuum effect in
quantum field theory.


title: Instanton Effects in QCD at High Baryon Density

abstract:
  We study instanton effects in QCD at very high baryon density. In this regime
instantons are suppressed by a large power of $(\Lambda_{QCD}/\mu)$, where
$\Lambda_{QCD}$ is the QCD scale parameter and $\mu$ is the baryon chemical
potential. Instantons are nevertheless important because they contribute to
several physical observables that vanish to all orders in perturbative QCD. We
study, in particular, the chiral condensate and its contribution $m_{GB}^2\sim
m<\bar{\psi}\psi>$ to the masses of Goldstone bosons in the CFL phase of QCD
with $N_f=3$ flavors. We find that at densities $\rho\sim (5-10) \rho_0$, where
$\rho_0$ is the density of nuclear matter, the result is dominated by large
instantons and subject to considerable uncertainties. We suggest that these
uncertainties can be addressed using lattice calculations of the instanton
density and the pseudoscalar diquark mass in QCD with two colors. We study the
topological susceptibility and Witten-Veneziano type mass relations in both
$N_c=2$ and $N_c=3$ QCD.


title: Strange-quark Current in the Nucleon from Lattice QCD

abstract:
  The contribution of the strange-quark current to the electromagnetic form
factors of the nucleon is studied using lattice QCD. The strange current matrix
elements from our lattice calculation are analyzed in two different ways, the
differential method used in an earlier work by Wilcox and a cumulative method
which sums over all current insertion times. The preliminary results of our
simulation indicate the importance of high statistics, and that consistent
results between the varying analysis methods can be achieved. Although this
simulation does not yet yield a number that can be compared to experiment,
several criteria useful in assessing the robustness of a signal extracted from
a noisy background are presented.


title: CP Violation in the Decay $\eta\to\pi^+\pi^-\gamma$

abstract:
  We study the CP violating effects in the decay of $\eta\to\pi^+\pi^-\gamma$.
We show that to have CP violation in the decay, one has to consider both linear
and circular photon polarizations. In the standard model, the polarizations are
vanishingly small. However, model-independently, i.e. using only experimental
constraint imposed by the limit on $Br(\eta\to\pi^+\pi^-)$ it can be up to
$O(10%)$. We also explore various possible operators and we find that the
tensor type operator, possibly arising from a nonzero CP violating electric
dipole moment of the strange quark, can induce a sizable linear photon
polarization.


title: The Underlying Event in Hard Scattering Processes

abstract:
  We study the behavior of the "underlying event" in hard scattering
proton-antiproton collisions at 1.8 TeV and compare with the QCD Monte-Carlo
models. The "underlying event" is everything except the two outgoing hard
scattered "jets" and receives contributions from the "beam-beam remnants" plus
initial and final-state radiation. The data indicate that neither ISAJET or
HERWIG produce enough charged particles (with PT > 0.5 GeV/c) from the
"beam-beam remnant" component and that ISAJET produces too many charged
particles from initial-state radiation. PYTHIA which uses multiple parton
scattering to enhance the "underlying event" does the best job describing the
data.


title: Non-linear field theory for lepton and quark masses

abstract:
  Barut's formula for the mass of leptons is successfully extended to quarks. A
very simple non-linear scalar field model explains both the N^4 power law
dependence of the mass, and the existence of a cut-off which limits the number
of leptons to three and the number of quarks to five, suggesting that the mass
of the sixth quark is of different origin.


title: Dark Matter in SUSY Models

abstract:
  Direct detection experiments for neutralino dark matter in the Milky Way are
examined within the framework of SUGRA models with R-parity invariance and
grand unification at the GUT scale, M_G. Models of this type apply to a large
number of phenomena, and all existing bounds on the SUSY parameter space due to
current experimental constraints are included. For models with universal soft
breaking at M_G (mSUGRA), the Higgs mass and b\to s\gamma constraints imply
that the gaugino mass, m_{1/2}, obeys m_{1/2} >(300-400)GeV putting most of the
parameter space in the co-annihilation domain where there is a relatively
narrow band in the m_0 - m_{1/2} plane. For $\mu > 0$ we find that the
neutralino -proton cross section >~ 10^{-10} pb for m_{1/2} < 1 TeV, making
almost all of this parameter space accessible to future planned detectors. For
\mu < 0, however, there will be large regions of parameter space with cross
sections < 10^{-12} pb, and hence unaccessible experimentally. If, however, the
muon magnetic moment anomaly is confirmed, then \mu >0 and m_{1/2}<~ 800 GeV.
Models with non-universal soft breaking in the third generation and Higgs
sector can allow for new effects arising from additional early universe
annihilation through the Z-channel pole. Here cross sections that will be
accessible in the near future to the next generation of detectors can arise,
and can even rise to the large values implied by the DAMA data. Thus dark
matter detectors have the possibility of studying the the post-GUT physics that
control the patterns of soft breaking.


title:
New Generation of Parton Distributions with Uncertainties from Global
  QCD Analysis

abstract:
  A new generation of parton distribution functions with increased precision
and quantitative estimates of uncertainties is presented. This work
significantly extends previous CTEQ and other global analyses on two fronts:
(i) a full treatment of available experimental correlated systematic errors for
both new and old data sets; (ii) a systematic and pragmatic treatment of
uncertainties of the parton distributions and their physical predictions, using
a recently developed eigenvector-basis approach to the Hessian method. The new
gluon distribution is considerably harder than that of previous standard fits.
A number of physics issues, particularly relating to the behavior of the gluon
distribution, are addressed in more quantitative terms than before. Extensive
results on the uncertainties of parton distributions at various scales, and on
parton luminosity functions at the Tevatron RunII and the LHC, are presented.
The latter provide the means to quickly estimate the uncertainties of a wide
range of physical processes at these high-energy hadron colliders, based on
current knowledge of the parton distributions. In particular, the uncertainties
on the production cross sections of the $W,Z$ at the Tevatron and the LHC are
estimated to be $\pm 4%$ and $\pm 5%$ respectively, and that of a light Higgs
at the LHC to be $\pm 5%$.


title: Single production of doubly charged Higgs bosons at hadron colliders

abstract:
  We reconsider the single production of the doubly charged Higgs bosons
Delta_R^{++} and Delta_L^{++} at the LHC and TEVATRON in the framework of the
left-right symmetric model and the Higgs triplet model. We show that in the
left-right symmetric model the production of Delta_R^{++} by Drell-Yan process
via W_R exchange may give the dominant contribution. The same channel for the
production of Delta_L^{++} in the Higgs triplet model is insignificant.


title:
Collinear effective theory at subleading order and its application to
  heavy-light currents

abstract:
  We consider a collinear effective theory of highly energetic quarks with
energy E, interacting with collinear and soft gluons by integrating out
collinear degrees of freedom to subleading order. The collinear effective
theory offers a systematic expansion in power series of a small parameter
lambda ~ p_{\perp}/E, where p_{\perp} is the transverse momentum of a collinear
particle. We construct the effective Lagrangian to first order in $\lambda$,
and discuss its features including additional symmetries such as collinear
gauge invariance and reparameterization invariance. Heavy-light currents can be
matched from the full theory onto the operators in the collinear effective
theory at one loop and to order lambda. We obtain heavy-light current operators
in the effective theory, calculate their Wilson coefficients at this order, and
the renormalization group equations for the Wilson coefficients are solved. As
an application, we calculate the form factors for decays of B mesons to light
energetic mesons to order lambda and at leading-logarithmic order in alpha_s.


title: Fundamental Constants at High Energy

abstract:
  The progress of Particle Physics is closely linked to the progress in the
understanding of the fundamental constants, like the finestructure constant,
the mass of the electron or nucleon, or the electroweak mixing angle. The
relation between the 18 fundamental constants of the Standard Model and the
elementary units used in other fields like quantum optics or solid state
physics is far from trivial and will be discussed. Relations between the
various constants might exist, providing signals for the physics beyond the
Standard Model. Recent observations in astrophysics indicate a slight time
variation of the finestructure constant. If true, it has profound implications
for many particle and nuclear physics phenomena. In particular the nuclear mass
scale should change in time, a phenomenon which could be observed in the
laboratory using advanced methods of quantum optics.


title:
Dipole coefficients in B -> X_s gamma in supersymmetry with large
  \tan\beta and explicit CP violation

abstract:
  We perform a detailed study of the electric and chromoelectric dipole
coefficients in B -> X_s \gamma decay in a supersymmetric scheme with explicit
CP violation. In our analysis, we adopt the minimal flavor violation scheme by
taking into account the \tan\beta-enhanced large contributions beyond the
leading order. We show that the coefficients can deviate from the SM prediction
significantly in both real and imaginary directions. Experimental bounds still
allow for large deviations from the SM predictions for both dipole coefficients
such that the CP asymmetry is as large as \pm 8%. There are further
implications of these coefficients for the charmless hadronic and semileptonic
B decays. As a direct application of our analysis, we have discussed \Lambda_b
-> \Lambda \gamma decay.


title: Symmetry structure and phase transitions

abstract:
  We study chiral symmetry structure at finite density and temperature in the
presence of external magnetic field and gravity, a situation relevant in the
early Universe and in the core of compact stars.
  We then investigate the dynamical evolution of phase transition in the
expanding early Universe and possible formation of quark nuggets and their
survival.


title: HERWIG 6.4 Release Note

abstract:
  A new release of the Monte Carlo program HERWIG (version 6.4) is now
available. The main new features are: spin correlations between the production
and decay of heavy fermions, i.e. top quarks, tau leptons and SUSY particles;
polarization effects in SUSY production processes in lepton-lepton collisions;
an interface to TAUOLA for tau decays; MSSM Higgs processes in lepton-lepton
collisions.


title:
Phenomena of spin rotation and oscillation of particles (atoms,
  molecules) containing in a trap blowing on by wind of high energy particles
  in storage ring - new method of measuring of spin-dependent part of
  zero-angle coherent scattering amplitude

abstract:
  New experiment arrangement to study spin rotation and oscillation of
particles of gas target through which beam of high energy particles passes is
discussed. Such experiment arrangement make it realizable for storage ring and
allows to study zero-angle scattering amplitude at highest possible energies.
Life-time of particle beam in storage ring can reach several hours and even
days. Life-time of particle in gas target (gas trap) is long too. Particles
circulate in storage ring with frequency $\nu$ of several MHz that yields to
the $\nu$-fold increase of density of high energy particles beam blowing gas
trap in comparison with single passing case.
  Finally, this causes perfectly acceptable angle of spin rotation of particles
containing in gas cell. Relation between index of refraction and effective
potential energy of a particle in a medium is discussed. Phenomenon of spin
rotation of a particle captured to a trap under the action of a beam of
polarized particles is considered. Expressions for effective potential energy
and angle of spin rotation are derived for particles in a trap. Rrotation and
oscillation of deuteron spin is studied. Estimations for angle of rotation show
that the effect can be experimentally observed.


title: Soliton Systems at Finite Temperatures and Finite Densities

abstract:
  The finite-density and finite-temperature phase portraits of the baby-Skyrme
and Skyrme models are investigated. Both grand-canonical and canonical
approaches are employed. The grand-canonical approach can be used to find the
``natural'' crystal structure of the baby-Skyrme model and it is shown to have
triangular symmetry. The phase portraits include solid, liquid and
phase-coexistence between solids and vacuum states. Furthermore, a chiral phase
transition can be observed for both models. The phase portrait of the Skyrme
model is compared with that expected of strongly interacting matter, and we
also contrast our results to other models.


title: Nonequilibrium Quantum Fields and the Classical Field Theory Limit

abstract:
  We calculate the far-from-equilibrium dynamics and thermalization both for
the quantum and the classical O(N)--model. The early and late-time behavior can
be described from the 2PI--loop expansion for weak couplings or the
nonperturbative 2PI--1/N expansion of the effective action beyond leading
order. A comparison with exact simulations in 1+1 dimensions in the classical
limit shows that the 2PI--1/N expansion at next-to-leading order gives
quantitatively precise results already for moderate values of N. We derive a
criterion for the validity of the classical approximation and verify it by
comparing far-from-equilibrium quantum and classical dynamics. At late times
one observes the expected deviations due to the difference between classical
and quantum thermal equilibrium.


title: Some Recent Developments in Perturbative Quantum Chromodynamics

abstract:
  This talk reviews some recent trends in perturbative quantum chromodynamics,
with emphasis on higher orders in perturbation theory, resummation and power
corrections.


title: Next-to-Next-to-Leading Order Higgs Production at Hadron Colliders

abstract:
  The Higgs boson production cross section at pp and p\bar{p} colliders is
calculated in QCD at next-to-next-to-leading order (NNLO). We find that the
perturbative expansion of the production cross section is well behaved and that
scale dependence is reduced relative to the NLO result. These findings give us
confidence in the reliability of the prediction. We also report an error in the
NNLO correction to Drell-Yan production.


title: Flavon exchange effects in models with abelian flavor symmetry

abstract:
  In models with abelian flavor symmetry the small mixing angles and mass
ratios of quarks and leptons are typically given by powers of small parameters
characterizing the spontaneous breaking of flavor symmetry by "flavon" fields.
If the scale of the breaking of flavor symmetry is near the weak scale, flavon
exchange can lead to interesting flavor-violating and CP violating effects.
These are studied. It is found that d_e, mu -> e + gamma, and mu-e conversion
on nuclei can be near present limits. For significant range of parameters mu-e
conversion can be the most sensitive way to look for such effects.


title: A Closer Look at the Elementary Fermions

abstract:
  Although there have been many experimental and theoretical efforts to measure
and interpret small deviations from the standard model of particle physics, the
gap that the model leaves in understanding why there are only three generations
of elementary fermions, with hierarchical masses, has not received the
attention it deserves. I present here an attempt to fill this gap. Although our
findings are mostly only qualitative, they nevertheless may be of heuristic
value. Rules concerning the elementary fermions, some previously known and some
new, lead to a number of conclusions and questions that seem worth pursuing.
Some clarify the standard model, and others suggest possible modifications, the
implications of which are discussed.


title: Dynamics of a large extra dimension inspired hybrid inflation model

abstract:
  In low scale quantum gravity scenarios the fundamental scale of nature can be
as low as TeV, in order to address the naturalness of the electroweak scale. A
number of difficulties arise in constructing specific models; stabilisation of
the radius of the extra dimensions, avoidance of overproduction of Kaluza Klein
modes, achieving successful baryogenesis and production of a close to
scale-invariant spectrum of density perturbations with the correct amplitude.
We examine in detail the dynamics, including radion stabilisation, of a hybrid
inflation model that has been proposed in order to address these difficulties,
where the inflaton is a gauge singlet residing in the bulk. We find that for a
low fundamental scale the phase transition, which in standard four dimensional
hybrid models usually ends inflation, is slow and there is second phase of
inflation lasting for a large number of e-foldings. The density perturbations
on cosmologically interesting scales exit the Hubble radius during this second
phase of inflation, and we find that their amplitude is far smaller than is
required. We find that the duration of the second phase of inflation can be
short, so that cosmologically interesting scales exit the Hubble radius prior
to the phase transition, and the density perturbations have the correct
amplitude, only if the fundamental scale takes an intermediate value. Finally
we comment briefly on the implications of an intermediate fundamental scale for
the production of primordial black holes and baryogenesis.


title:
S-D Mixing and Searching for the psi(1P1) State at the Beijing
  Electron-Positron Coolider

abstract:
  The psi(1P1) state can be produced at the Beijing Electron-Positron Collider
(BEPC) in the process psi'-->psi(1P1)+pi(0). We calculate the rate of this
process taking account of the S-D mixing effect in psi'. It is shown that the
rate is about a factor of 3 smaller than the simple result without considering
the S-D mixing effect. Possible detecting channels are suggested and it is
shown that psi(1P1) is able to be found with the accumulation of 30 million
events of psi' at BEPC.


title:
How accurately can one test CPT conservation with reactor and solar
  neutrino experiments?

abstract:
  We show that the combined data from solar neutrino experiments and from the
KamLAND reactor neutrino experiment can establish an upper limit on, or detect,
potential CPT violation in the neutrino sector of order 10^{-20} GeV to
10^{-21} GeV.


title: Quark scattering at QGP/2SC interface

abstract:
  We considered the phenomenon of the Andreev reflection of quarks at the
interface between the cold quark-gluon plasma phase and 2SC color
superconductor.


title: Flavor Asymmetry of Nucleon Sea from Detailed Balance

abstract:
  In this study, the proton is taken as an ensemble of quark-gluon Fock states.
Using the principle of detailed balance, we find $\bar{d}-\bar{u} \approx
0.124$, which is in surprisingly agreement with the experimental observation.


title: Parton Distribution of Proton in a Simple Statistical Model

abstract:
  Taking proton as an ensemble of quark-gluon Fock states and using the
principle of detailed balance, we construct a simple statistical model for
parton distribution of proton. The recent observed Bjorken-$x$ dependent light
flavor sea quark asymmetry $\bar{d}(x)-\bar{u}(x)$ can be well reproduced by
Monte Carlo simulation as a pure statistical effect.


title: An Insight into the Anatomy of Electro-Gravitational Interactions

abstract:
  An interplay between electromagnetic and gravitational interactions is
studied with particular emphasis on the particles mass dependence of
amplitudes. The cancellations between diagrams due to the gauge invarinace are
explicitly demonstrated.


title: Light Higgs Triplets in Extra Dimensions

abstract:
  We discuss the possibility that the Higgs triplet can be light (1TeV in the
most interesting case) without contradictions with the proton stability %and
the gauge coupling unification in the context of higher dimensional theory. The
proton stability is ensured by the suppression of Yukawa coupling of the Higgs
triplet to the matter through its small overlap of wave functions in extra
dimensions. The light Higgs triplets might be detected in future collider
experiments as an alternative signature of GUT instead of the proton decay. The
gauge coupling unification can be preserved by introducing extra bulk matter
fields.


title: Mass spectra of doubly heavy baryons in the relativistic quark model

abstract:
  Mass spectra of baryons consisting of two heavy (b or c) and one light quarks
are calculated in the framework of the relativistic quark model. The light
quark-heavy diquark structure of the baryon is assumed. Under this assumption
the ground and excited states of both the diquark and quark-diquark bound
system are considered. The quark-diquark potential is constructed. The light
quark is treated completely relativistically, while the expansion in the
inverse heavy quark mass is used revealing the close similarity with the mass
spectra of B and D mesons. We find that the relativistic treatment of the light
quark plays an important role. The level inversion of the p-wave excitations of
the light quark in doubly heavy baryons is discussed.


title: Calculation of epsilon'/epsilon

abstract:
  I shortly review the present status of the theoretical calculations of
epsilon'/epsilon and the comparison with the present experimental results. I
discuss the role of higher order chiral corrections and in general of
non-factorizable contributions for the explanation of the Delta I = 1/2
selection rule and direct CP violation in kaon decays. Still lacking reliable
lattice calculations, analytic methods and phenomenological approaches are
helpful in understanding correlations among theoretical effects and the
experimental data. Substantial progress from lattice QCD is expected in the
coming years.


title:
Measurements of the SUSY Higgs self-couplings and the reconstruction of
  the Higgs potential

abstract:
  We address the issue of the reconstruction of the scalar potential of a
two-Higgs doublet model having in mind that of the MSSM.
  We first consider the general CP conserving dim-4 effective potential. To
fully reconstruct this potential, we show that even if all the Higgs masses and
their couplings to the standard model particles are measured one needs not only
to measure certain trilinear Higgs self-couplings but some of the quartic
couplings as well. We also advocate expressing the Higgs self couplings in the
mass basis. We show explicitly, that in the so-called decoupling limit, the
most easily accessible Higgs self-couplings are given in terms of the Higgs
mass while all other dependencies on the parameters of the general effective
potential are screened. This helps also easily explain how, in the
  MSSM, the largest radiative corrections which affect these self couplings are
reabsorbed by using the corrected Higgs mass. We also extend our analysis to
higher order operators in the effective Higgs potential. While the above
screening properties do not hold, we argue that these effects must be small and
may not be measured considering the foreseen poor experimental precision in the
extraction of the SUSY Higgs self-couplings.


title: Large Electric Dipole Moments of Heavy Neutrinos

abstract:
  In many models of CP violation, the electric dipole moment (EDM) of a heavy
charged or neutral lepton could be very large. We present an explicit model in
which a heavy neutrino EDM can be as large as $10^{-16}$ e-cm, or even a factor
of ten larger if fine-tuning is allowed, and use an effective field theory
argument to show that this result is fairly robust. We then look at the
production cross section for these neutrinos, and by rederiving the Bethe-Block
formula, show that they could leave an ionization track. It is then noted that
the first signature of heavy neutrinos with a large EDM would come from
$e^+e^-\to \bar{N}N\gamma$, leading to a very large rate for single photon plus
missing energy events, and the rate and angular distribution are found.
Finally, we look at some astrophysical consequences, including whether these
neutrinos could constitute the UHE cosmic rays and whether their decays in the
early universe could generate a net lepton asymmetry.


title:
Quasirotational Disturbances of the Relativistic String with Massive
  Ends and Higher Radial Excitations of Hadrons

abstract:
  For the relativistic string with massive ends the small disturbances of its
rotational motion (quasirotational states) are investigated. They are presented
in the form of Fourier series with the two types of oscillatory modes. They
have the form of stationary waves correspondently in the rotational plane and
in the orthogonal direction. The calculated values of the energy and angular
momentum of these states give us possibility to describe higher radial
excitations for hadrons with the help of the planar quasirotational oscillatory
modes of the string with massive ends.


title: Four Big Questions with Pretty Good Answers

abstract:
  I discuss four big questions that can be importantly addressed using concepts
from modern QCD. They concern the origin of mass, the feebleness of gravity,
the uniqueness of physical laws, and the fate of matter when it is squeezed
very hard.


title: Andreev reflection at QGP/CFL interface

abstract:
  In this letter we address the question of the phenomena of Andreev reflection
between the cold quark-gluon plasma phase and CFL color superconductor. We show
that there are two different types of reflections connected to the structure of
the CFL phase. We also calculate the probability current at the interface and
we show that it vanishes for energy of scattering quarks below the
superconducting gap.


title: Implications of observed neutrinoless double beta decay

abstract:
  Recently a positive indication of the neutrinoless double beta decay has been
announced. We study the implications of this result taking into consideration
earlier results on atmospheric neutrinos and solar neutrinos. We also include
in our discussions the recent results from SNO and K2K. We point out that on
the confidence level given for the double beta signal, the neutrino mass
matrices are now highly constrained. All models predicting Dirac masses are
ruled out and leptogenesis becomes a natural choice. Only the degenerate and
the inverted hierarchical solutions are allowed for the three generation
Majorana neutrinos. In both these cases we find that the radiative corrections
destabilize the solutions and the LOW, VO and Just So solutions of the solar
neutrinos are ruled out. For the four generation case only the inverted
hierarchical scenario is allowed.


title: Pattern of the Approximate Mass Degeneracy of Majorana Neutrinos

abstract:
  In view of the recently reported evidence for a nonzero Majorana mass of the
electron neutrino, together with the established phenomena of atmospheric and
solar neutrino oscillations, the case of three nearly mass-degenerate Majorana
neutrinos is now a distinct possibility. I show in this paper how a natural
pattern of symmetry breaking in the recently proposed $A_4$ model of Majorana
neutrino masses can accommodate the data on neutrino oscillations, resulting in
the predictions $\sin^2 2 \theta_{atm} = 1$ and $\sin^2 2 \theta_{sol} = 2/3$.


title: Majorana neutrinos with split fermions in extra dimensions

abstract:
  We propose new solutions to the neutrino mass problem in theories with large
extra dimensions in a thick wall scenario. It has recently been argued that our
3-brane could be a thick wall at the boundary of the bulk. The gauge bosons and
the Higgs scalars have an almost flat profile on this wall, while fermions
could have localized profile with left-handed and right-handed components
displaced with respect to each other. We point out that with split fermions it
is possible to generate Majorana neutrino masses contributing to the
neutrinoless double beta decay. The almost degenerate neutrinos can also come
out naturally in this case. Unlike other models of neutrino masses in extra
dimensions there are no bulk fields in this scenario.


title: Physics at Future Hadron Colliders

abstract:
  We discuss the physics opportunities and detector challenges at future hadron
colliders. As guidelines for energies and luminosities we use the proposed
luminosity and/or energy upgrade of the LHC (SLHC), and the Fermilab design of
a Very Large Hadron Collider (VLHC). We illustrate the physics capabilities of
future hadron colliders for a variety of new physics scenarios (supersymmetry,
strong electroweak symmetry breaking, new gauge bosons, compositeness and extra
dimensions). We also investigate the prospects of doing precision Higgs physics
studies at such a machine, and list selected Standard Model physics rates.


title: Black Hole Production at the LHC: Effects of Voloshin Suppression

abstract:
  We examine the rates for the production of black holes(BH) at the LHC in
light of the exponential suppression of the geometric cross section estimate
recently proposed by Voloshin. We show that the resulting production rates will
still be quite large over a reasonably wide range of model parameters. While BH
production may no longer be the dominant collider process, its unique signature
will ensure observability over more conventional backgrounds.


title: The Puzzle of the Bottom Quark Production Cross Section

abstract:
  The production rate of bottom quarks at hadron colliders exceeds the
expectations of next-to-leading order perturbative quantum chromodynamics. An
additional contribution from pair-production of light gluinos, of mass 12 to 16
GeV, with two-body decays into bottom quarks and light bottom squarks, yields a
differential cross section for bottom quarks in better agreement with data. The
masses of the gluino and bottom squark are restricted further by the ratio of
like-sign to opposite-sign leptons at hadron colliders. Restrictions on this
scenario from other data are summarized, and predictions are made for other
processes such as Upsilon decay into a pair of bottom squarks.


title:
Nuclear shadowing in deep inelastic scattering on nuclei: leading twist
  versus eikonal approaches

abstract:
  We use several diverse parameterizations of diffractive parton distributions,
extracted in leading twist QCD analyses of the HERA diffractive deep inelastic
scattering (DIS) data, to make predictions for leading twist nuclear shadowing
of nuclear quark and gluon distributions in DIS on nuclei. We find that the
HERA diffractive data are sufficiently precise to allow us to predict large
nuclear shadowing for gluons and quarks, unambiguously. We performed detailed
studies of nuclear shadowing for up and charm sea quarks and gluons within
several scenarios of shadowing and diffractive slopes, as well as at central
impact parameters. We compare these leading twist results with those obtained
from the eikonal approach to nuclear shadowing (which is based on a very
different space-time picture) and observe sharply contrasting predictions for
the size and Q^2-dependence of nuclear shadowing. The most striking differences
arise for the interaction of small dipoles with nuclei, in particular for the
longitudinal structure function F_{L}^{A}.


title: Evidence for Neutrinoless Double Beta Decay

abstract:
  The data of the Heidelberg-Moscow double beta decay experiment for the
measuring period August 1990 - May 2000 (54.9813 kg y or 723.44 molyears),
published recently, are analyzed using the potential of the Bayesian method for
low counting rates. First evidence for neutrinoless double beta decay is
observed giving first evidence for lepton number violation. The evidence for
this decay mode is 97% (2.2\sigma) with the Bayesian method, and 99.8% c.l.
(3.1\sigma) with the method recommended by the Particle Data Group. The
half-life of the process is found with the Bayesian method to be T_{1/2}^{0\nu}
= (0.8 - 18.3) x 10^{25} y (95% c.l.) with a best value of 1.5 x 10^{25} y. The
deduced value of the effective neutrino mass is, with the nuclear matrix
elements from [Sta90,Tom91] < m >= (0.11 - 0.56) eV (95% c.l.), with a best
value of 0.39 eV. Uncertainties in the nuclear matrix elements may widen the
range given for the effective neutrino mass by at most a factor 2. Our
observation which at the same time means evidence that the neutrino is a
Majorana particle, will be of fundamental importance for neutrino physics.
PACS. 14.69.Pq Neutrino mass and mixing; 23.40.Bw Weak-interaction and lepton
(including neutrino) aspects 23.40.-s Beta decay; double beta decay; electron
and muon capture.


title:
Brane-Production and the Neutrino-Nucleon cross section at Ultra High
  Energies in Low Scale Gravity Models

abstract:
  The origin of the ultra high energy cosmic ray (UHECR) showers has remained
as a mystery among particle physicists and astrophysicists. In low scale
gravity models, where the neutrino-nucleon cross section rises to typical
hadronic values at energies above $10^{20}$ eV, the neutrino becomes a
candidate for the primary that initiates these showers. We calculate the
neutrino-nucleon cross section at ultra high energies by assuming that it is
dominated by the production of p-branes. We show, using a generalized
Randall-Sundrum model, that the neutrino-nucleon cross-section at neutrino
energies of $10^{11}$ GeV is of the order of 100 mb, which is required for
explaining UHECR events. Similar result also follows in other models such as
the Lykken-Randall model.


title: Compilation of SUSY particle spectra from Snowmass 2001 benchmark models

abstract:
  A comparative study of supersymmetric particle spectra calculated by the
programs ISAJET, SUSYGEN and PYTHIA is presented for various SUSY scenarios
defined at the Snowmass 2001 workshop.


title:
J/psi Inclusive Production in nu N Neutral-Current Deep-Inelastic
  Scattering

abstract:
  We calculate the cross section of J/psi inclusive production in
neutrino-nucleon deep-inelastic scattering via the weak neutral current within
the factorization formalism of nonrelativistic quantum chromodynamics. Besides
J/psi single production via the Z-gluon fusion mechanism, we also consider
J/psi plus hadron-jet associated production. We take into account both direct
production and feed-down from directly-produced heavier charmonia. We present
theoretical predictions for the J/psi transverse-momentum and rapidity
distributions, which can be measured in the CHORUS and NOMAD experiments at
CERN, including conservative error estimates. In order to interpret a recent
CHORUS measurement of the total cross section, we also estimate the
contribution due to J/psi prompt production via diffractive processes using the
vector-meson dominance model.


title: Space-Time Evolution of the Oscillator, Rapidly moving in a random media

abstract:
  We study the quantum-mechanical evolution of the nonrelativistic oscillator,
rapidly moving in the media with the random vector fields. We calculate the
evolution of the level probability distribution as a function of time, and
obtain rapid level diffusion over the energy levels. Our results imply a new
mechanism of charmonium dissociation in QCD media.


title:
Constraints on Higher-Order Perturbative Corrections in $b\to u$
  Semileptonic Decays from Residual Renormalization-Scale Dependence

abstract:
  The constraint of a progressive decrease in residual renormalization scale
dependence with increasing loop order is developed as a method for obtaining
bounds on unknown higher-order perturbative corrections to
renormalization-group invariant quantities. This technique is applied to the
inclusive semileptonic process $b\to u \bar\nu_\ell\ell^-$ (explicitly known to
two-loop order) to obtain bounds on the three- and four-loop perturbative
coefficients that are not accessible via the renormalization group. Using the
principle of minimal sensitivity, an estimate is obtained for the perturbative
contributions to $\Gamma(b\to u \bar\nu_\ell\ell^-)$ that incorporates
theoretical uncertainty from as-yet-undetermined higher order QCD corrections.


title: The width of the \xi(2230) meson

abstract:
  A lower bound of 135 MeV for the width of the \xi meson is obtained from
analyzing the pp and pbar-p interactions by use of Regge theory. The pp data
exclude a narrow \xi as the latter would lead to total pbar-p cross sections
far exceeding the measured ones. The broad width explains why the \xi may not
be seen in pbarp-p experiments.


title: Double Inflation in Supergravity and Primordial Black Holes Formation

abstract:
  In this talk we propose a natural double inflation model in supergravity.
Chaotic inflation first takes place by virtue of the Nambu-Goldstone-like shift
symmetry. During chaotic inflation, an initial value of second inflation (new
inflation) is set, which is adequately far from the local maximum of the
potential due to the small linear term in the K\"ahler potential. Then,
primordial fluctuations within the present horizon scale may be produced during
both inflations. Primordial fluctuations responsible for anisotropies of the
cosmic microwave background radiation and the large scale structure are
produced during chaotic inflation, while fluctuations on smaller scales are
produced during new inflation. Because of the peculiar nature of new inflation,
they can become as large as $10^{-1}$-$10^{-2}$, which may lead to the
formation of primordial black holes.


title: Elastic Scattering of Neutrinos off Polarized Electrons

abstract:
  We calculate the cross sections for elastic nu_l + e -> nu_l + e and antinu_l
+ e -> antinu_l + e scattering (l=e, mu or tau) in the Born approximation and
with exactly fixed polarization states of target and final-state electrons,
discussing their sensitivity to the incident (anti)neutrino flavor. We suggest
investigation of the flavor composition of a (anti)neutrino beam by a
flux-independent analysis of the scattering of its constituents off polarized
electrons.


title: The quark Regge trajectory at two loops

abstract:
  The hypothesis of the quark Reggeization is tested by taking the high-energy
limit of the two-loop amplitude for quark-gluon scattering which was recently
calculated. The limit is compatible with the Reggeization in the leading and
the next-to-leading orders and allows the determination of the quark trajectory
in the two-loop approximation. The trajectory is presented as an expansion in
powers of (D-4) for the space-time dimension $D$ tending to the physical value
D=4.


title:
Precision study of positronium and precision tests of the bound state
  QED

abstract:
  Despite its very short lifetime positronium provides us with a number of
accurate tests of the bound state QED. In this note a brief overview of QED
theory and precision experiments on the spectrum and annihilation decay of the
positronium atom is presented. Special attention is paid to the accuracy of
theoretical predictions.


title: Does one observe chiral symmetry restoration in baryon spectrum?

abstract:
  It has recently been suggested that the parity doublet structure seen in the
spectrum of highly excited baryons may be due to effective chiral symmetry
restoration for these states. We review the recent developments in this field.
We demonstrate with a simple quantum-mechanical example that it is a very
natural property of quantum systems that a symmetry breaking effect which is
important for the low-lying spectrum of the system, can become unimportant for
the highly-lying states; the highly lying states reveal a multiplet structure
of nearly degenerate states. Using the well established concepts of
quark-hadron duality, asymptotic freedom in QCD and validity of the operator
product expansion in QCD we show that the spectral densities obtained with the
local currents that are connected to each other via chiral transformations,
very high in the spectrum must coincide. Hence effects of spontaneous breaking
of chiral symmetry in QCD vacuum that are crucially important for the low-lying
spectra, become irrelevant for the highly-lying states. Then to the extent that
identifiable hadronic resonances still exist in the continuum spectrum at high
excitations this implies that the highly excited hadrons must fall into
multiplets associated with the representations of the chiral group. We
demonstrate that this is indeed the case for meson spectra in the large $N_c$
limit. All possible parity-chiral multiplets are classified for baryons and it
is demonstrated that the existing data on highly excited $N$ and $\Delta$
states at masses of 2 GeV and higher is consistent with approximate chiral
symmetry restoration. However new experimental studies are needed to achieve
any definitive conclusions.


title:
Electroweak Symmetry Breaking by Strong Dynamics and the Collider
  Phenomenology

abstract:
  We discuss the possible signatures in the electroweak symmetry breaking
sector by new strong dynamics at future hadron colliders such as the Tevatron
upgrade, the LHC and VLHC, and $e^+e^-$ linear colliders. Examples include a
heavy Higgs-like scalar resonance, a heavy Technicolor-like vector resonance
and pseudo-Goldstone states, non-resonance signatures via enhanced gauge-boson
scattering and fermion compositeness.


title:
$B\to \phi \pi$ and $B^0 \to \phi\phi$ in the Standard Model and new
  bounds on R parity violation

abstract:
  We study the pure penguin decays $B \to \phi\pi$ and $B^0 \to \phi\phi$.
Using QCD factorization, we find ${\cal B}(B^\pm \to\phi\pi^{\pm}
)=2.0^{+0.3}_{-0.1}\times 10^{-8}$. For the pure penguin annihilation process
$B^0 \to \phi\phi$, analyzed here for the first time, ${\cal B}(B^0
\to\phi\phi)=2.1^{+1.6}_{-0.3}\times 10^{-9}$. The smallness of these decays in
the Standard Model makes them sensitive probes for new physics. From the upper
limit of $B\to \phi\pi$,we find constraints on R parity violating couplings, $|
\lambda{''}_{i23}\lambda{''}_{i21}|<6\times10^{-5}$, $|
\lambda'_{i23}\lambda'_{i21}|<4\times10^{-4}$ and $|
\lambda'_{i32}\lambda'_{i12}|<4\times10^{-4}$ for $i=1,2,3$. Our new bounds on
$|\lambda{''}_{i23}\lambda{''}_{i21}|$ are one order of magnitude stronger than
before. Within the available upper bounds for $|
\lambda{''}_{i23}\lambda{''}_{i21}|$, $|\lambda'_{i23}\lambda'_{i21}|$ and
$|\lambda'_{i32}\lambda'_{i12}|$, we find that ${\cal B}(B\to\phi\phi)$ could
be enhanced to $10^{-8}\sim 10^{-7}$. Experimental searches for these decays
are strongly urged.


title: Some aspects of collisional sources for electroweak baryogenesis

abstract:
  We consider the dynamics of fermions with a spatially varying mass which
couple to bosons through a Yukawa interaction term and perform a consistent
weak coupling truncation of the relevant kinetic equations. We then use a
gradient expansion and derive the CP-violating source in the collision term for
fermions which appears at first order in gradients. The collisional sources
together with the semiclassical force constitute the CP-violating sources
relevant for baryogenesis at the electroweak scale. We discuss also the absence
of sources at first order in gradients in the scalar equation, and the
limitations of the relaxation time approximation.


title: Baryon Chiral Perturbation Theory in the 1/N Expansion

abstract:
  The chiral Lagrangian for baryons is formulated in an expansion in 1/N_c. The
chiral Lagrangian implements the contracted spin-flavor symmetry of large-N_c
baryons as well as nonet symmetry of the leading planar diagrams. Large-N_c
consistency conditions ensure that chiral loop corrections are suppressed in
1/N_c through exact cancellation of chiral loop graphs to fixed orders in
1/N_c. Application of 1/N_c baryon chiral perturbation theory to the flavor-27
baryon mass splittings and the baryon axial vector currents are considered as
examples.


title:
Softly broken supersymmetric Yang-Mills theories: Renormalization and
  non-renormalization theorems

abstract:
  We present a minimal version for the renormalization of softly broken
Super-Yang-Mills theories using the extended model with a local gauge coupling.
It is shown that the non-renormalization theorems of the case with unbroken
supersymmetry are valid without modifications and that the renormalization of
soft-breaking parameters is completely governed by the renormalization of the
supersymmetric parameters. The symmetry identities in the present context are
peculiar, since the extended model contains two anomalies: the Adler-Bardeen
anomaly of the axial current and an anomaly of supersymmetry in the presence of
the local gauge coupling. From the anomalous symmetries we derive the exact
all-order expressions for the beta functions of the gauge coupling and of the
soft-breaking parameters. They generalize earlier results to arbitrary
normalization conditions and imply the NSVZ expressions for a specific
normalization condition on the coupling.


title:
Classical and quantum cross-section for black hole production in
  particle collisions

abstract:
  We suggest a simple model to study the problem of the black hole production
in particle collisions. The cross-section for the classical and quantum
production is analysed within this model. In particular, the possibility to
form a black hole in collision of low energy particles (or at large impact
parameter) via the quantum tunneling mechanism is pointed out. It is found
that, in this model, the geometric cross-section gives a good estimate for the
production at low and high energies. We also reconsider the arguments in favor
of exponential suppression for the production of trans-Planckian black hole and
conclude that no such suppression in fact appears. Analyzing the probability
for the black hole production we point out on the importance of the
backreaction and reevaluate the contribution of the black hole formed in
gravitational collapse to the Euclidean path integral.


title: Prospects for Higgs Boson Searches in the Channel WH -> lnbb

abstract:
  We present a method how to detect the WH -> lnbb in the high luminosity LHC
environment with the CMS detector. This study is performed with fast detector
response simulation including high luminosity event pile up. The main aspects
of reconstruction are pile up jet rejection, identification of b-jets and
improvement of Higgs mass resolution.
  The detection potential in the SM for m(H) < 130 GeV and in the MSSM is only
encouraging for high integrated luminosity. Nevertheless it is possible to
extract important Higgs parameters which are useful to elucidate the nature of
the Higgs sector. In combination with other channels, this channel provides
valuable information on Higgs boson couplings.


title: Prospect of the Zee model

abstract:
  The Zee model is one of promising models of neutrino mass generation
mechanism. However, the original Zee model is not on the framework of the
ground unification scenario, and moreover, it is recently pointed out that the
predicted value of $\sin^2 2\theta_{solar}$ must be satisfied the relation
$\sin^2 2\theta_{solar} > 0.99$. We discuss whether possible GUT versions of
the Zee model can be free from the severe constraint $\sin^2 2\theta_{solar}
>0.99$ or not. We will conclude that the following two models are promising: an
R-parity violating SUSY GUT model and an SO(10) model with a 126-plet scalar.


title: Strong-weak CP hierarchy from non-renormalization theorems

abstract:
  We point out that the hierarchy between the measured values of the CKM phase
and the strong CP phase has a natural origin in supersymmetry with spontaneous
CP violation and low energy supersymmetry breaking. The underlying reason is
simple and elegant: in supersymmetry the strong CP phase is protected by an
exact non-renormalization theorem while the CKM phase is not. We present
explicit examples of models which exploit this fact and discuss corrections to
the non-renormalization theorem in the presence of supersymmetry breaking. This
framework for solving the strong CP problem has generic predictions for the
superpartner spectrum, for CP and flavor violation, and predicts a preferred
range of values for electric dipole moments.


title: Flavor-Spin Symmetry and the Tensor Charge

abstract:
  Exploiting an approximate phenomenological symmetry of the $J^{PC}=1^{+-}$
light axial vector mesons and using pole dominance, we calculate the flavor
contributions to the nucleon tensor charge. The result depends on the decay
constants of the axial vector mesons and their couplings to the nucleons.


title:
Phenomenological Analysis of Charmless Decays B-->PV with QCD
  Factorization

abstract:
  We study the hadronic charmless two-body B decays to final states involving
pseudoscalar and vector mesons with QCD factorization approach, including the
contributions from the chirally enhanced power corrections and weak
annihilations. The CP-averaged branching ratios and CP-violating asymmetries
are given. Most of our results are in agreement with the present measurements,
but the branching ratios of some decay channels are only marginally consistent
with the experimental observations. Considering the large uncertainties, great
advances in both experiment and theory in the near future are strongly
expected.


title: Angular Ordering in Gluon Radiation

abstract:
  The assumption of angular ordering in gluon radiation is essential to obtain
quantitative results concerning gluonic behaviors. In order to prove the
validity of this assumption, we have applied our momentum space flux-tube
formalism to check out the angular dependences of gluon radiation. We have
calculated the probability amplitudes to get new gluon, and have found that the
new gluon is generally expected to have the maximum amplitude when it is
produced between the momentum directions of the last two partons.


title:
Dynamical symmetry breaking of $\lambda\phi^4$ in two loop effective
  potential

abstract:
  The two loop effective potential of massless $\lambda\phi^4$ theory was
presented in several regularization and renormalization prescriptions and the
dynamical symmetry breaking solution was obtained in strong coupling situation
in several prescriptions except the Coleman-Weinberg prescription. The beta
function in the broken phase becomes negative and the UV fixed point turns out
to be a strong coupling one, and its numeric value varies with renormalization
prescriptions, a detail in difference from the asymptotic free solution in one
loop case. The symmetry breaking phase was shown to be an entirely strong
coupling phase. The reason of the relevance of the renormalization
prescriptions was shown to be due to the non-perturbative nature of the
effective potential. We also reanalyzed the two loop effective potential by
adopting a differential equation approach basing on the understanding that
takes all the QFT's as the ill-defined formulations of the 'low energy'
effective theories of a complete underlying theory. Then the relevance of the
prescriptions of fixing the local ambiguities to physical properties like
symmetry breaking was further emphasized. We also tentatively proposed a
rescaling insensitivity argument for fixing the quadratic ambiguities. Some
detailed properties of the strongly coupled broken phase and related issues
were discussed.


title: Constraints for nuclear gluon shadowing from DIS data

abstract:
  The $Q^2$ dependence of the ratios of the cross sections of deep inelastic
lepton--nucleus scattering is studied in the framework of leading twist, lowest
order perturbative QCD. The $\log Q^2$ slope of the ratio $F_2^{\rm
Sn}/F_2^{\rm C}$ is computed by using the DGLAP evolution equations, and shown
to be sensitive to the nuclear gluon distribution functions. Four different
parametrizations for the nuclear effects of parton distributions are studied.
We show that the NMC data on the $Q^2$ dependence of $F_2^{\rm Sn}/F_2^{\rm C}$
rule out the case where nuclear shadowing (suppression) of gluons at $x\sim
0.01$ is much larger than the shadowing observed in the ratio $F_2^A/F_2^{\rm
D}$. We also show that the possible nonlinear correction terms due to gluon
fusion in the evolution equations do not change this conclusion. Some
consequences for computation of RHIC multiplicities, which probe the region
$x\gsim0.01$, are also discussed.


title: The Constraints of Unitary on $\pi\pi$ Scattering Dispersion Relations

abstract:
  A new dispersion relation for the partial wave $\pi\pi$ scattering $S$ matrix
is set up. Using the dispersion relation we generalize the single channel
unitarity condition, $SS^+=1$, to the entire complex $s$ plane, which is
equivalent to the generalized unitarity condition in quantum mechanics. The
pole positions of the $\sigma$ resonance and the $f_0(980)$ resonance are
estimated based on the theoretical relations we obtained. The central value of
the $\sigma$ pole position is $M_\sigma\simeq 410$MeV, $\Gamma_\sigma\simeq
550$MeV, obtained after including the the constraint of the Adler zero
condition.


title: CPT Violation Implies Violation of Lorentz Invariance

abstract:
  An interacting theory that violates CPT invariance necessarily violates
Lorentz invariance. On the other hand, CPT invariance is not sufficient for
out-of-cone Lorentz invariance. Theories that violate CPT by having different
particle and antiparticle masses must be nonlocal.


title: Gauge invariance and weak forces in an isotropic medium

abstract:
  We demonstrate that the neutrino kinetic equation derived by the standard
Bogolyubov method is formally gauge non-invariant and give a recipe how to
recast it to the gauge invariant form recovering the standard Lorentz form weak
force term which apparently conserves the lepton current. The analogy with the
QED plasma case is traced which in asymptotic regions implies substitution of
electric charge $e$ by the induced electric charge $e_{\nu}^{ind}$ of neutrino
within the phase factor connecting neutrino gauge invariant and non-invariant
distribution functions.


title:
Tadpole diagrams due to KK modes of graviton and radion do not
  contribute to the $\rho$ parameter

abstract:
  In this brief report we show that tadpole diagrams due to KK modes of the
graviton and radion do not contribute to the vectorial isospin breaking $\rho$
parameter. Our result is fairly general and it holds both for ADD and RS type
scenarios. It shows that the difference between the results of different
publications on this subject is not due to some of them not having considered
tadpole diagrams in estimating the contribution to the $\rho$ parameter.


title: Signatures of Baryogenesis in the MSSM

abstract:
  We revisit the electroweak baryogenesis within the context of the minimal
supersymmetric standard model (MSSM), studying its potential collider
signatures. We find that this mechanism of baryogenesis does not give a new CP
violating signal at the $B$-factories. The first circumstantial evidence may
come from enhanced $B_s$ or $B_d$ mixing. If a light right-handed scalar top
and Higgs are found as required, a linear collider represents the best
possibility for confirming the scenario.


title: Neutrinoless double beta decay can constrain neutrino dark matter

abstract:
  We examine how constraints can be placed on the neutrino component of dark
matter by an accurate measurement of neutrinoless double beta
($0\nu\beta\beta$) decay and the solar oscillation amplitude. We comment on the
alleged evidence for $0\nu\beta\beta$ decay.


title:
Complete solutions of Altarelli-Parisi evolution equations in leading
  order and structure functions at low-x

abstract:
  We present comlete solutions of singlet and non-singlet Altarelli-Parisi (AP)
evolution equations in leading order at low-x. We obtain t-evolutions of proton
and neutron structure functions and x-evolutions of deuteron structure
functions at low-x from AP evolution eqiations. The results of t-evolutions are
compared with HERA low-x and low-Q^2 data and those of x-evolutions are
compared with NMC low-x and low-Q^2 data. Also we compare our results with
those of general solutions of AP evolution equations.


title: Recent developments in cosmology

abstract:
  This article gives an overview, aimed at theoretical particle physicists, of
some recent developments in cosmology.


title: Generalized parton distributions in constituent quark models

abstract:
  An approach is proposed to calculate Generalized Parton Distributions (GPDs)
in a Constituent Quark Model (CQM) scenario. These off-diagonal distributions
are obtained from momentum space wave functions to be evaluated in a given non
relativistic or relativized CQM. The general relations linking the twist-two
GPDs to the form factors and to the leading twist quark densities are
consistently recovered from our expressions. Results for the leading twist,
unpolarized GPD, H, in a simple harmonic oscillator model, as well as in the
Isgur and Karl model, are shown to have the general behavior found in previous
estimates. NLO evolution of the obtained distributions, from the low momentum
scale of the model up to the experimental one, is also shown. Further natural
applications of the proposed formalism are addressed.


title: Effective Field Theories of QCD

abstract:
  These are the proceedings of the workshop on ``Effective Field Theories of
QCD'' held at the Physikzentrum Bad Honnef of the Deutsche Physikalische
Gesellschaft, Bad Honnef, Germany from November 26 to 30, 2001. The workshop
concentrated on Chiral Perturbation Theory in its various settings, its
relations with lattice QCD and dispersion theory and the use of effective field
theories in systems with one, two or more nucleons as well as at high baryon
densities. Included are a short contribution per talk and a listing of some
review papers on the subject.


title: The challenge of hyperon polarization

abstract:
  We provide a brief topical outline of the persisting problem of the hyperon
polarization and consider some future experimental prospects. The predictions
which deserve experimental verification are proposed.


title: Baryogenesis in models with large extra dimensions

abstract:
  We describe how difficult it is to realise baryogenesis in models where the
fundamental scale in nature is as low as TeV. The problem becomes even more
challenging if we assume that there are only {\it two} extra compact spatial
dimensions, because thermal history of such a Universe is strongly constrained
by various cosmological and astrophysical bounds which translate the maximal
temperature of the Universe which must not exceed $\sim {\cal O}(10)$MeV. This
simply reiterates that the observed baryon asymmetry must be synthesised just
above the nucleosynthesis scale. In this talk we address how to construct a
simple model which can overcome this challenge.


title: Studies on the Weak Charges of Particles

abstract:
  In order to include massive neutrino theoretically, a new concept of the weak
charges of the particles, fundamental fermions, intermediate bosons and
hadrons, is introduced. A new conservation law of the weak charge is first
reported. According to the chirality of the weak charge the origin of parity
nonconservation in the weak interactions is reasonably explained. According to
the symmetry of the weak charge, an extension of the standard model is
proposed. In this scenario, all the three generations of neutrinos are massive
Dirac particles; both the right-handed neutrinos and the right-handed neutral
baryons have zero weak charge, and so they do not take part in the weak
interactions.


title: Ground state Meson masses in the Separation Geometry model

abstract:
  In this paper the techniques of discretised QCD developed in physics/0109024
are are extended to a study of ground-state pseudo-scalar mesons involving
higher generation quarks. The correspondence with empirical data is good with
the exception of the charmed-bottom meson with the predicted value of 6.911GeV
varying considerably from the empirical value of 6.4 GeV although it is still
within two sigma and provides an avenue for further testing of the theory.


title:
Spin Effects in Processes of Single Top Quark Production at Hadron
  Colliders

abstract:
  We investigate spin properties of single top quark production at hadron
colliders. Based on an analogy with single top production and polarized top
quark decay, we reproduce in a simple way the results by G.Mahlon and S.Parke
on the existence of preferred axes for the decomposition of the top quark spin.
For the W*- and W-g fusion production modes these axes are related to the
down-type quark momentum. The proposed method allows finding kinematical
conditions for the observation of top quark polarization in a third process
that contributes to single top production and is important at LHC energies, the
tW-process, in which spin effects are smeared out by the contribution of
diagrams with a QCD gtt-vertex. A simple Monte-Carlo analysis of spin
correlations for the tW-process with subsequent top decay is given as an
illustration.


title:
On masses of unstable particles and their antiparticles in the
  CPT-invariant system

abstract:
  We show that the diagonal matrix elements of the effective Hamiltonian
governing the time evolution in the subspace of states of an unstable particle
and its antiparticle need not be equal at $t > t_{0}$ ($t_{0}$ is the instant
of creation of the pair) when the total system under consideration is CPT
invariant but CP noninvariant. To achieve this we use the transition amplitudes
for transitions $|{\bf 1}> \to |{\bf 2}>$, $|{\bf 2}> \to |{\bf 1}>$ together
with the identity expressing the effective Hamiltonian by these amplitudes and
their derivatives with respect to time $t$. This identity must be fulfilled by
any effective Hamiltonian (both approximate and exact) derived for the two
state complex. The unusual consequence of this result is that, contrary to the
properties of stable particles, the masses of the unstable particle "1" and its
antiparticle "2" need not be equal for $t \gg t_{0}$ in the case of preserved
CPT and violated CP symmetries.


title: Cosmic rays above the ankle from Z-bursts

abstract:
  Neutrinos from far away sources annihilating at the Z resonance on relic
neutrinos may give origin to the ultrahigh-energy cosmic rays. Here we present
predictions of this mechanism with relic neutrinos lighter than 1 eV, which do
not gravitationally cluster. We show that not only the super GZK events, but
the "ankle" and all events above it can be accounted for. Most primaries above
the ankle are predicted to be nucleons up to $10^{20.0}$ eV and photons at
higher energies. We also find an accumulation at the GZK cutoff energy, a hint
of which can be seen in the data.


title: Two-loop QED and QCD corrections to massless fermion-boson scattering

abstract:
  We present the NNLO QCD virtual corrections for qurak-antiquark -> gluon
photon, quark-antiquark -> photon photon and the NNLO QED virtual corrections
for electron positron -> photon photon and all processes related by crossing
symmetry. We perform an explicit evaluation of the two-loop diagrams in
conventional dimensional regularisation, and our results are renormalised in
the MSbar scheme. The infrared pole structure of the amplitudes is in agreement
with the prediction of Catani's general formalism for the singularities of
two-loop amplitudes, while expressions for the finite remainder are given for
all processes in terms of logarithms and polylogarithms that are real in the
physical region.


title: Signals for Noncommutative QED at High Energy $e^+e^-$ Colliders

abstract:
  We examine the signatures for noncommutative QED at $e^+e^-$ colliders with
center of mass energies in excess of 1 TeV such as CLIC. For integrated
luminosities of 1 ab$^{-1}$ or more, sensitivities to the associated mass
scales greater than $\sqrt s$ are possible.


title: Spin physics with STAR

abstract:
  The STAR collaboration aims to study polarized proton-proton collisions at
RHIC. The emphasis of the spin run this year is on transverse single spin
asymmetries. Beyond 2001, we aim to determine directly and precisely the gluon
polarization, as well as the polarizations of the u, $\bar{u}$, d and $\bar{d}$
quarks in the proton by measuring in addition longitudinal and double spin
asymmetries. Furthermore, we aim to measure for the first time the quark
transversity distributions. These measurements will improve substantially the
knowledge and understanding of the spin structure of the nucleon.


title: Neutrinoless Double Beta Decay with R-parity Violation

abstract:
  We consider recently observed neutrinoless double beta decay in the context
of the minimal supersymmetric standard model with R-parity violating couplings
lambda^{'}. We observe that most of the current experimental bounds on the
R-parity violating couplings do not exclude the possibility that the
neutrinoless double beta decay is caused by R-parity violation. But if we
consider K-bar{K} oscillation, we observe that we have to make the R-parity
violating couplings generation-dependent to accomodate with the observed
neutrinoless double beta decay. And furthermore, we need some mechanism to
cancel the contribution to K-bar{K} mixing from a large R-parity violating
coupling. We realized this cancellation by assuming that the first- and the
second- generation of quark sector do not couple with the first-generation
lepton sector by R-parity violating couplings except the term
W=lambda_{111}^{'} L_{1} Q_{1} D_{1}^{c}, which is responsible for the observed
neutrinoless double beta decay.


title: Resummation of perturbatively enhanced gluon radiative corrections

abstract:
  By remaining strictly within the confines of QCD, i.e., {\it without}
invoking the parton model or any other exogenous element, we identify and resum
perturbatively to leading order, along with a correction term, enhanced
radiative gluon contributions to the Drell-Yan type ($q\bar{q}$ pair
annihilation) and deep-inelastic-scattering type ($eq\to eq+X$) cross-sections.
The key feature of the adopted approach is the recasting of QCD in terms of a
space-time mode of description, which employs a path-integral formulation of
field theories, as originally implied in works of Fock, Feynman and Schwinger.


title:
Random Phase Approximation and Extensions Applied to a Bosonic Field
  Theory

abstract:
  An application of a self-consistent version of RPA to quantum field theory
with broken symmetry is presented. Although our approach can be applied to any
bosonic field theory, we specifically study the $\phi^4$ theory in 1+1
dimensions. We show that standard RPA approach leads to an instability which
can be removed when going to a superior version,i.e. the renormalized RPA. We
present a method based on the so-called charging formula of the many electron
problem to calculate the correlation energy and the RPA effective potential.


title:
Neutrino-Charged Matter Interactions: a General Four-Fermion Effective
  Parametrization

abstract:
  Given the eventuality of neutrino and muon factories in the foreseeable
future, all possible 2-to-2 processes involving two neutrinos, whether Dirac or
Majorana ones, and two charged fermions are considered on the basis of the most
general Lorentz invariant four-fermion effective interaction possible, in the
limit of massless particles. Such a parametrization should enable the
assessment of the sensitivity to physics beyond the Standard Model, including
the eventual discrimination between the Dirac or Majorana character of
neutrinos, of specific experimental beam and detector designs.


title: Phenomenological study of charm photoproduction at HERA

abstract:
  We present predictions for single inclusive distributions of charmed mesons,
relevant to the HERA experiments. Our results are based upon a computation that
correctly incorporates mass effects up to the next-to-leading order level, and
the resummation of transverse momentum logarithms up to
next-to-leading-logarithmic level. We apply the same acceptance cuts as the H1
and Zeus experiments, and compare our results to their data. We perform a study
of the sensitivity of our predictions on the charm mass, $\LambdaQCD$,
factorization scale, renormalization scale, and fragmentation parameters.


title:
Selectron Pair Production at e-e- and e+e- Colliders with Polarized
  Beams

abstract:
  We investigate selectron pair production and decay in e-e- scattering and
e+e- annihilation with polarized beams taking into account neutralino mixing as
well as ISR and beamstrahlung corrections. One of the main advantages of having
both modes at disposal is their complementarity concerning the threshold
behaviour of selectron pair production. In e-e- the cross sections at threshold
for seleectron_R selectron_R and selectron_L selectron_L rise proportional to
the momentum of the selectron and in e+ e- that for selectron_R selectron_L.
Measurements at threshold with polarized beams can be used to determine the
selectron masses precisely. Moreover we discuss how polarized electron and
positron beams can be used to establish directly the weak quantum numbers of
the selectrons. We also use selectron pair production to determine the gaugino
mass parameter M_1. This is of particular interest for scenarios with
non-universal gaugino masses at a high scale resulting in |M_1| << |M_2| at the
electroweak scale. Moreover, we consider also the case of a non-vanishing
selectron mixing and demonstrate that it leads to a significant change in the
phenomenology of selectrons.


title: SIMUB -- a Monte Carlo Generator for Physics Simulation of B Decays

abstract:
  We present the SIMUB package developed at Dubna for MC generation of B meson
production and decays.
  The starting version of the package includes lepton modes of B decays, in
particular, semileptonic decays B->D^*l\nu and "golden" mode
B->J/\psi(\mu\mu)\phi(KK) with taking into account all theoretical refinements
including B^0-Bbar^0 oscillations and angular correlations.


title:
Large lepton flavor violating signals in supersymmetric particle decays
  at future e+ e- colliders

abstract:
  We study lepton flavor violating signals at a future e+ e- linear collider
within the general MSSM, allowing for the most general flavor structure. We
demonstrate that there is a large region in parameter space with large signals,
while being consistent with present experimental bounds on rare lepton decays
such as mu -> e gamma. In our analysis, we include all possible signals from
charged slepton and sneutrino production and their decays as well as from the
decays of neutralinos and charginos. We also consider the background from the
Standard Model and the MSSM. We find that in general the signature e tau
missing energy is the most pronounced one. We demonstrate that even for an
integrated luminosity of 100 inverse fb the signal can be large. At a high
luminosity linear collider, precision experiments will allow one to determine
the lepton flavor structure of the MSSM.


title: Conformal invariant saturation

abstract:
  We show that, in onium-onium scattering at (very) high energy, a transition
to saturation happens due to quantum fluctuations of QCD dipoles. This
transition starts when the order $\alpha^2$ correction of the dipole loop is
compensated by its faster energy evolution, leading to a negative interference
with the tree level amplitude. After a derivation of the the one-loop dipole
contribution using conformal invariance of the elastic 4-gluon amplitude in
high energy QCD, we obtain an exact expression of the saturation line in the
plane (Y,L) where Y is the total rapidity and L, the logarithm of the onium
scale ratio. It shows universal features implying the Balitskyi - Fadin -
Kuraev - Lipatov (BFKL) evolution kernel and the square of the QCD triple
Pomeron vertex. For large L, only the higher BFKL Eigenvalue contributes,
leading to a saturation depending on leading log perturbative QCD
characteristics. For initial onium scales of same order, however, it involves
an unlimited summation over all conformal BFKL Eigenstates. In all cases,
conformal invariance is preserved for the saturation mechanism based on dipole
loops.


title: Electroweak Phase Transition and Baryogenesis

abstract:
  I review the status of the strength of the electroweak phase transition, and
electroweak baryogenesis in the Minimal Supersymmetric Standard Model (work
done with K. Kainulainen and M. Joyce). The emphasis is on new brane-inspired
ideas about electroweak baryogenesis, and improvements in the semiclassical
treatment of CP violation at a first order electroweak phase transition.


title:
Cosmological bounds on neutrino degeneracy improved by flavor
  oscillations

abstract:
  We study three-flavor neutrino oscillations in the early universe in the
presence of neutrino chemical potentials. We take into account all effects from
the background medium, i.e. collisional damping, the refractive effects from
charged leptons, and in particular neutrino self-interactions that synchronize
the neutrino oscillations. We find that effective flavor equilibrium between
all active neutrino species is established well before the big-bang
nucleosynthesis (BBN) epoch if the neutrino oscillation parameters are in the
range indicated by the atmospheric neutrino data and by the large mixing angle
(LMA) MSW solution of the solar neutrino problem. For the other solutions of
the solar neutrino problem, partial flavor equilibrium may be achieved if the
angle theta_13 is close to the experimental limit tan^2(theta_13)<0.065. In the
LMA case, the BBN limit on the nu_e degeneracy parameter, |xi_nu|< 0.07, now
applies to all flavors. Therefore, a putative extra cosmic radiation
contribution from degenerate neutrinos is limited to such low values that it is
neither observable in the large-scale structure of the universe nor in the
anisotropies of the cosmic microwave background radiation. Existing limits and
possible future measurements, for example in KATRIN, of the absolute neutrino
mass scale will provide unambiguous information on the cosmic neutrino mass
density, essentially free of the uncertainty of the neutrino chemical.
potentials.


title: Connecting structure functions on the lattice with phenomenology

abstract:
  We examine the extraction of moments of parton distributions from lattice
data, focusing in particular on the chiral extrapolation as a function of the
quark mass. Inclusion of the correct chiral behavior of the spin-averaged
isovector distribution resolves a long-standing discrepancy between the lattice
moments and experiment. We extract the x-dependence of the valence u-d
distribution from the lowest few lattice moments, and discuss the implications
for the quark mass dependence of meson masses lying on the rho Regge
trajectory. The role of chiral symmetry in spin-dependent distributions, and in
particular the lattice axial vector charge, g_A, is also highlighted.


title: The eta-prime -> eta pi pi decay in U(3) chiral perturbation theory

abstract:
  The dominant decay mode of the eta-prime, eta-prime -> eta pi pi, is
investigated within the framework of infrared regularized U(3) chiral
perturbation theory up to fourth chiral order and including one-loop
corrections. We find reasonable agreement with experimental data and observe
convergence of the chiral series.


title: Phenomenology of Neutrino Oscillations

abstract:
  We review the status of several phenomenological topics of current interest
in neutrino oscillations: (i) Solar neutrino oscillations after the first
Sudbury Neutrino Observatory measurements, including both model-independent and
model-dependent results; (ii) Dominant nu_mu-->nu_tau oscillations of
atmospheric and K2K neutrinos, and possible subdominant oscillations induced by
either extra states or extra interactions; and (iii) Four-neutrino scenarios
embedding the controversial LSND evidence for oscillations.


title: Neutrino oscillations and signals in beta and 0nu2beta experiments

abstract:
  Assuming Majorana neutrinos, we infer from oscillation data the expected
values of the parameters m_{nu_e} and m_{ee} probed by beta and 0nu2beta-decay
experiments. If neutrinos have a `normal hierarchy' we get the 90% CL ranges
|m_{ee}| = (0.7 - 4.6) meV, and discuss in which cases future experiments can
test this possibility. For `inverse hierarchy', we get |m_{ee}| = (12 - 57) meV
and m_{\nu_e} = (40 - 57) meV. The 0nu2beta data imply that almost degenerate
neutrinos are lighter than 1.05 h eV at 90% CL, competitive with the beta-decay
bound. We critically reanalyse the data that were recently used to claim an
evidence for 0nu2beta, and discuss their implications. Finally, we review the
predictions of flavour models for m_{ee} and theta_{13}.