title: TopReX generator (version~3.25). Short manual

abstract:
  This is the manual of the specialized event generator TopReX 3.25. The
generator provides the simulation of several important processes in pp and p
pbar collisions, not implemented in PYTHIA (yet). Some of these processes
include t-quarks whose spin polarizations are taken into account in the
subsequent decay of the t-quarks. Several non-SM top quark decay channels are
included, too. All calculated subprocesses can be accessed from PYTHIA as
external processes. In addition, TopReX can be used as stand alone event
generator, providing partonic final states before showering. In this mode the
control of the event generation is taken by TopReX itself. A few simple
examples of main routines, which show how to use TopReX in the different modes
are discussed.


title:
Quantum Boltzmann equations for electroweak baryogenesis including gauge
  fields

abstract:
  We review and extend to include the gauge fields our derivation of the
semiclassical limit of the collisionless quantum transport equations for the
fermions in presence of a CP-violating bubble wall at a first order electroweak
phase transition. We show how the (gradient correction modified) Lorenz-force
appears both in the Schwinger-Keldysh approach and in the semiclassical
WKB-treatment. In the latter approach the inclusion of gauge fields removes the
apparent phase reparametrization dependence of the intermediate calculations.
We also discuss setting up the fluid equations for practical calculations in
electroweak baryogenesis including the self-consistent (hyper)electric field
and the anomaly.


title: The Odderon in High Energy Elastic pp Scattering

abstract:
  We study the Odderon contribution to elastic pp and ppbar scattering at high
energies. Different models for the Odderon-proton coupling are considered and
their effects on the differential cross section in the dip region are
investigated. We use a Regge fit by Donnachie and Landshoff as a framework and
replace its Odderon contribution by the different models. We consider two
models for the Odderon-proton impact factor proposed by Fukugita and Kwiecinski
and by Levin and Ryskin. In addition we construct a geometric model of the
proton which allows us to put limits on the size of a possible diquark cluster
in the proton. All models are able to describe the data well. The two models
for the impact factor require the strong coupling constant to be fixed rather
precisely. In the geometric model a relatively small diquark size is required
to describe the data.


title:
The anomalous magnetic moment of the muon in the D-brane realization of
  the Standard Model

abstract:
  The anomalous magnetic moment of the muon is evaluated in the D-brane
realization of the Standard Model. It is pointed out that the massive anomalous
U(1) gauge bosons predicted, give extra contributions that are compatible with
current experimental data.


title:
Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive
  Deep Inelastic Scattering

abstract:
  Recent measurements from the HERMES and SMC collaborations show a remarkably
large azimuthal single-spin asymmetries A_{UL} and A_{UT} of the proton in
semi-inclusive pion leptoproduction. We show that final-state interactions from
gluon exchange between the outgoing quark and the target spectator system lead
to single-spin asymmetries in deep inelastic lepton-proton scattering at
leading twist in perturbative QCD; i.e., the rescattering corrections are not
power-law suppressed at large photon virtuality Q^2 at fixed x_{bj}. The
existence of such single-spin asymmetries requires a phase difference between
two amplitudes coupling the proton target with J^z_p = + 1/2 and -1/2 to the
same final state, the same amplitudes which are necessary to produce a nonzero
proton anomalous magnetic moment. We show that the exchange of gauge particles
between the outgoing quark and the proton spectators produces a Coulomb-like
complex phase which depends on the angular momentum L_z of the proton's
constituents and is thus distinct for different proton spin amplitudes. The
single-spin asymmetry which arises from such final-state interactions does not
factorize into a product of distribution function and fragmentation function,
and it is not related to the transversity distribution delta q(x,Q) which
correlates transversely polarized quarks with the spin of the transversely
polarized target nucleon.


title:
Hadronic Light-by-Light Contribution to Muon g-2 in Chiral Perturbation
  Theory

abstract:
  We compute the hadronic light-by-light scattering contributions to the muon
anomalous magnetic moment, $\amulbl$, in chiral perturbation theory that are
enhanced by large logarithms and a factor of $N_C$. They depend on a low-energy
constant entering pseudoscalar meson decay into a charged lepton pair. The
uncertainty introduced by this constant is $\pm 60\times 10^{-11}$, which is
comparable in magnitude to the present uncertainty entering the leading-order
vacuum polarization contributions to the anomalous moment. It may be reduced to
some extent through an improved measurement of the $\pi^0\to e^+ e^-$ branching
ratio. However, the dependence of $\amulbl$ on non-logarithmically enhanced
effects cannot be constrained except through the measurement of the anomalous
moment itself. The extraction of information on new physics would require a
future experimental value for the anomalous moment differing significantly from
the 2001 result reported by the E821 collaboration.


title: Symmetry-breaking corrections to heavy meson form factor relations

abstract:
  In the heavy quark limit, the form factors for semileptonic and rare
radiative B decays into light mesons are related by heavy quark spin symmetry.
Here we compute the leading corrections of order \Lambda/m_Q to these symmetry
relations, showing also how to include hard gluon effects to any order in
\alpha_s(m_Q). The subleading correction to the form factor relation for B\to
\pi can be computed exactly in the soft pion limit. For decays into vector
mesons, the matrix elements of two local dimension-4 operators are needed, one
of which vanishes in the constituent quark model. A few applications are
briefly discussed.


title: Radiative decays of \phi-meson and nature of light scalar resonances

abstract:
  Based on gauge invariance, we show that the new threshold phenomenon is
discovered in the \phi radiative decays \phi\to\gamma a0\to\gamma\pi0\eta and
\phi\to\gamma f0\to\gamma\pi0\pi0.
  This enables to conclude that production of the lightest scalar mesons
a0(980) and f0(980) in these decays is caused by the four-quark transitions,
resulting in strong restrictions on the large Nc expansions of the decay
amplitudes. The analysis shows that these constraints give new evidences in
favor of the four-quark nature of a0(980) and f0(980) mesons.


title: Collider Implications of Universal Extra Dimensions

abstract:
  We consider the universal extra dimensions scenario of Appelquist, Cheng, and
Dobrescu, in which all of the SM fields propagate into one extra compact
dimension, estimated therein to be as large as $\sim (350$ GeV$)^{-1}$.
Tree-level KK number conservation dictates that the associated KK excitations
can not be singly produced. We calculate the cross sections for the direct
production of KK excitations of the gluon, $\gs$, and two distinct towers of
quarks, \qs and $\qt$, in proton-antiproton collisions at the Tevatron Run I
and II energies in addition to proton-proton collisions at the Large Hadron
Collider energy. The experimental signatures for these processes depend on the
stability of the lowest-lying KK excitations of the gluons and light quarks. We
find that the Tevatron Run I mass bound for KK quark and gluon final states is
about 350--400 GeV, while Run II can push this up to 450--500 GeV at its
initial luminosity and 500--550 GeV if the projected final luminosity is
reached. The LHC can probe much further: The LHC will either discover UED KK
excitations of quarks and gluons or extend the mass limit to about 3 TeV.


title:
Photon-exchange processes at hadron colliders as a probe of the dynamics
  of diffraction

abstract:
  The rich structure of photon-exchange processes at hadron colliders is
studied. We discuss central vector meson production pp --> p + J/psi + p, W
production pp --> p + W + X and mu+ mu- production. Each process has distinct,
and large, soft pp rescattering effects, which can be directly observed by
detecting the outgoing protons. This allows a probe of the optical density of
the proton, which plays a crucial role in the evaluation of the rapidity gap
survival probabilities in diffractive-like processes at hadron colliders. We
note that an alternative mechanism for J/psi production is odderon, instead of
photon, exchange; and that the ratio of odderon to photon contributions is
enhanced (suppressed) for phi(Upsilon) vector meson production.


title:
The Monte Carlo Event Generator AcerMC 1.0 with Interfaces to PYTHIA 6.2
  and HERWIG 6.3

abstract:
  The AcerMC Monte Carlo generator gives a possibility to generate some of the
Standard Model background processes which were recognised as very dangerous for
the searches at LHC, and generation of which was either unavailable or not
straightforward so far. The program itself provides a library of the massive
matrix elements (coded by MADGRAPH) and native phase space modules for
generation of a set of selected processes. The hard process event can be
completed by the initial and final state radiation, hadronisation and decays
through the existing interface with either PYTHIA 6.2 or HERWIG 6.3 event
generators. A distinctive feature of AcerMC is the efficient phase-space
sampling, achieved by a combination of multi-channel self-optimising approach
and a modified ac-VEGAS routine.


title:
Limits on Cosmological Variation of Strong Interaction and Quark Masses
  from Big Bang Nucleosynthesis, Cosmic, Laboratory and Oklo Data

abstract:
  Recent data on cosmological variation of the electromagnetic fine structure
constant from distant quasar (QSO) absorption spectra have inspired a more
general discussion of possible variation of other constants. We discuss
variation of strong scale and quark masses. We derive the limits on their
relative change from (i) primordial Big-Bang Nucleosynthesis (BBN); (ii)
  Oklo natural nuclear reactor, (iii) quasar absorption spectra, and (iv)
laboratory measurements of hyperfine intervals.

categories: hep-ph astro-ph gr-qc nucl-th physics.atom-ph


title:
On Theoretical Uncertainties of the W Angular Distribution in W-Pair
  Production at LEP2 Energies

abstract:
  We discuss theoretical uncertainties of the distribution in the cosine of the
W polar angle projected into a measurement of the anomalous triple gauge-boson
coupling \lambda=\lambda_{\gamma}=\lambda_Z at LEP2 energies for the tandem of
the Monte Carlo event generators KoralW and YFSWW3 and for the Monte Carlo
event generator RacoonWW. Exploiting numerical results of these programs and
cross-checks with experimental fitting procedures, we estimate that the
theoretical uncertainty of the value of \lambda due to electroweak corrections,
as obtained at LEP2 with the help of these programs, is ~0.005, about half of
the expected experimental error for the combined LEP2 experiments (~0.010). We
use certain idealized event selections; however, we argue that these results
are valid for realistic LEP2 measurements.


title:
On three-body $B^0 \to D^{*-} D^{(*)0} K^+$ decays and couplings of
  heavy mesons to light pseudoscalar mesons

abstract:
  We analyze the decay modes $B^0 \to D^{*-} D^0 K^+$ and $B^0 \to D^{*-}
D^{*0} K^+$ and, using the available experimental data, we find bounds for the
constants g and h describing the strong coupling of heavy mesons to light
pseudoscalar mesons. Both the decay channels are dominated by broad L=1 charm
resonances; the dominance is effective also in $B^0 \to D^{-} D^0 K^+$ and $B^0
\to D^{-} D^{*0} K^+$.


abstract:
  The IR finite one-loop box scalar integral with massless internal lines has
been recalculated. The result is very compact, simple and valid for arbitrary
values of the relevant kinematic variables. It is given in terms of only two
dilogarithms and a few logarithms, all of very simple arguments.


title: Neutrino mass matrix solutions and neutrinoless double beta decay

abstract:
  We present a determination of the neutrino mass matrix which holds for values
of the neutrinoless double beta decay effective mass m_{ee} larger than the
neutrino mass differences. We find eight possible solutions and discuss for
each one the corresponding neutrino mass eigenvalues and zero texture. A
minimal structure of the perturbations to add to these zero textures to recover
the full mass matrix is also determined. Implications for neutrino hot dark
matter are discussed for each solution.


title:
Far-from-equilibrium dynamics with broken symmetries from the 2PI-1/N
  expansion

abstract:
  We derive the nonequilibrium real-time evolution of an O(N) - invariant
scalar quantum field theory in the presence of a nonvanishing expectation value
of the quantum field. Using a systematic 1/N expansion of the 2PI effective
action to next-to-leading order, we obtain nonperturbative evolution equations
which include scattering and memory effects. The equivalence of the direct
method, which requires the resummation of an infinite number of skeleton
diagrams, with the auxiliary-field formalism, which involves only one diagram
at next-to-leading order, is shown.


title:
Numerical study on the correlation between CP violation in neutrino
  oscillations and baryogenesis

abstract:
  We numerically study the correlation between CP violation in the neutrino
oscillations and baryogenesis in the seesaw model. In this study we get the
heavy Majorana neutrino masses and lepton number asymmetries from their decays
by fitting the data of neutrino oscillations and by working on some hypothesis
of the Dirac-Yukawa term for neutrinos.


title: Atmospheric muons and neutrinos

abstract:
  This paper is a mini-review of the atmospheric muon and neutrino flux
calculations based upon a recent version of CORT code and up-to-date data on
primary cosmic rays and hadronic interactions. A comparison of calculations
with a representative set of atmospheric muon data for momenta below 1 TeV/c is
presented. The overall agreement between the calculated muon fluxes and the
data provides an evidence in favor of the validity of adopted description of
hadronic interactions and shower development. In particular, this supports the
low-energy atmospheric neutrino fluxes predicted with CORT which are
essentially lower than those used in current analyses of the sub-GeV and
multi-GeV neutrino induced events in underground neutrino detectors.


title: Higher Twist Effects in Nuclei

abstract:
  This talk serves as an introduction to higher twist effects in nuclei. We
want to discuss how perturbative QCD can be applied to processes involving
heavy nuclei by taking into account multiple scattering.


title: Genuine Three-Body Bose-Einstein Correlations and Percolation of Strings

abstract:
  Recent data show a large difference of the genuine three-body Bose-Einstein
correlations in S-Pb collisions and in Pb-Pb central collisions being close to
zero in the first case and to one in the second one. These results, unexpected
from conventional approaches, are naturally explained by the percolation of
colour strings produced in the collisions and subsequent incoherent
fragmentation of the formed clusters.


title: Beyond the Standard Model in B Decays: Three Topics

abstract:
  Three new results are discussed: (a) A non-vanishing amplitude for the `wrong
sign{'} kaon decay $B \to J/\Psi \bar{K}$ or its CP conjugate is shown to be a
necessary condition for obtaining different CP asymmetries in $B \to J/\Psi
K_{S,L}$. A significant effect would require a scale of new physics far below
the weak scale, all but ruling out this possibility. (b) The leading isospin
breaking contributions to the $B \to K^* \gamma$ decay amplitudes can be
calculated in QCD factorization, providing a sensitive probe of the penguin
sector of the effective weak Hamiltonian. New physics models which reverse the
predicted $10-20%$ Standard Model amplitude hierarchy could be ruled out with
more precise data. (c) A slowly falling $g^* g \eta^\prime$ form factor can be
ruled out using the $\eta^\prime$ spectrum obtained by ARGUS at the $\Upsilon
(1S)$. The decay $b \to s g \eta^\prime$ is therefore highly suppressed and the
origin of the anomalously large $B \to \eta^\prime X_s$ rate remains unknown,
perhaps requiring the intervention of New Physics.


title:
Present and Future Electroweak Precision Measurements and the Indirect
  Determination of the Mass of the Higgs Boson

abstract:
  We discuss the experimental and theoretical uncertainties on precision
electroweak observables and their relationship to the indirect constraints on
the Higgs-boson mass, $\MH$, in the Standard Model (SM). The critical
experimental measurements ($\MW$, $\sweff$, $\mt$, ...) are evaluated in terms
of their present uncertainties and their prospects for improved precision at
future colliders, and their contribution to the constraints on $\MH$. In
addition, the current uncertainties of the theoretical predictions for $\MW$
and $\sweff$ due to missing higher order corrections are estimated and
expectations and necessary theoretical improvements for future colliders are
explored. The constraints from rare B decays are also discussed. Analysis of
the present experimental and theoretical precisions yield a current upper bound
on $\MH$ of $\sim 200$ GeV. Including anticipated improvements corresponding to
the prospective situation at future colliders (Tevatron Run II, LHC, LC/GigaZ),
we find a relative precision of about 25% to 8% (or better) is achievable in
the indirect determination of $\MH$.


title: The CP-violating asymmetry in \eta\to\pi^+ \pi^- e^+e^-

abstract:
  We study the CP-violating asymmetry {\cal A}_{\rm CP}, which arises, in
\eta\to\pi^+\pi^- e^+e^-, from the angular correlation of the e^+ e^- and
\pi^+\pi^- planes due to the interference between the magnetic and electric
decay amplitudes. With the phenomenologically determined magnetic amplitude and
branching ratio as input, the asymmetry, induced by the electric bremsstrahlung
amplitude through the CP-violating decay \eta\to\pi^+\pi^-, and by an
unconventional tensor type operator, has been estimated respectively. The upper
bound of {\cal A}_{\rm CP} from the former is about 10^{-3}, and the asymmetry
from the latter might be up to O(10^{-2}). One can therefore expect that this
CP asymmetry would be an interesting CP-violating observable for the future
precise measurements in the \eta factories.


title:
Constraints on Neutrino Mixing Parameters By Observation of Neutrinoless
  Double Beta Decay

abstract:
  Assuming positive observation of neutrinoless double bata decay together with
the CHOOZ reactor bound, we derive constraints imposed on neutrino mixing
parameters, the solar mixing angle \theta_{12} and the observable mass
parameter < m >_{\beta} in single beta decay experiments. We show that 0.05 eV
< < m >_{\beta} < 2 eV at the best fit parameters of the LMA MSW solar neutrino
solution by requiring the range of the parameter < m >_{\beta \beta} deduced
from recently announced double beta decay events at 95 % CL with +/- 50 %
uncertainty of nuclear matrix elements.


title: Project "CalcPHEP: Calculus for Precision High Energy Physics"

abstract:
  In this paper we describe the present status and our plans for the
realization of next phases of the CalcPHEP project aimed at the theoretical
support of experiments at modern and future accelerators: TEVATRON, LHC,
electron Linear Colliders (LC's) i.e. TESLA, NLC, CLIC, and muon factories.
Within this project, we are creating a four-level computer system which
eventually must automatically calculate pseudo- and realistic observables for
more and more complicated processes of elementary particle interactions, using
the principle of knowledge storing. The first phase of the CalcPHEP system was
realized in the site http://brg.jinr.ru/ in 2000--2001.


title:
Leading Effects in the Spectra of $\Lambda_c$ and $\bar{\Lambda}_c$
  Produced in $\Sigma^-p$, $pp$ and $\pi^-p$ Interactions

abstract:
  The spectra of leading and nonleading charmed baryons ($\Lambda_c$ and
$\bar{\Lambda}_c$) as well as the asymmetries between these spectra measured in
$\Sigma^-A$, $\pi^-A$ and pA collisions at $p_L= 600 GeV/c$ in the E781
experiment are simultaneously described within the framework of Quark-Gluon
String Model (QGSM). It is shown that the charmed baryon spectra can be fitted
by QGSM curves calculated with the parameter of diquark fragmentation,
$a_f^{\Lambda_c}$=0.006. It was obtained in this experiment that the asymmetry
between the spectra of $\Lambda_c$ and $\bar{\Lambda}_c$ in $\pi^-A$ collisions
is of nonzero value. It might be described in our model only assuming that the
string junction is transfered from target proton into the kinematical region of
pion projectile fragmentation.


title: Neutrino mixing schemes and neutrinoless double beta decay

abstract:
  We study the possible structure of the neutrino mass matrix taking into
consideration the solar and atmospheric neutrinos and the neutrinoless double
beta decay. We emphasize on mass matrices with vanishing elements. There are
only a very few possibilities remaining at present. We concentrate on three
generation scenarios and find that with three parameters there are few
possibilities with and without any vanishing elements. For completeness we also
present a five parameter four neutrino (with one sterile neutrino) mass matrix
which can explain all these experiments and the LSND result.


title:
Transverse spin effects in H/A -> tau^+ tau^- ; tau^{+-} -> nu X^{+-},
  Monte Carlo approach

abstract:
  The transverse spin effects may be helpful to distinguish between scalar
(J^{PC}=0^{++}) or pseudoscalar (J^{PC}=0^{-+}) nature of the spin zero (Higgs)
particle once discovered in future accelerator experiments. The correlations
can manifest themselves e.g. in distribution of acollinearity angle of X^{+-}
in decay chain H/A -> tau^+ tau^- ; tau^{+-} -> nu X^{+-}. This delicate
measurement will require however reconstruction of the Higgs boson rest-frame.
Then, questions of the combined detector-theoretical effects may be critical to
establish reliability of the method. Appropriate Monte Carlo program is
essential.
  In the present paper we extend the standard universal interface, of the
TAUOLA tau-lepton decay library, to include the complete spin effects for tau
leptons originating from the spin zero particle. As usual, the interface is
expected to work with any Monte Carlo generator providing Higgs boson
production, and subsequent decay into pair of tau leptons.
  Some example of numerical results and cross checks of the program, will be
also given.


title:
Constraints on Models for Proton-Proton Scattering from Multi-strange
  Baryon Data

abstract:
  The recent data on pp collisions at 158 GeV provide severe constraints on
string models: These measurements allow for the first time to determine how
color strings are formed in ultrarelativistic proton-proton collisions.


title: Exact Cross Sections for the Neutralino WIMP Pair-Annihilation

abstract:
  We derive a full set of exact, analytic expressions for the annihilation of
the lightest neutralino pairs into all two-body tree-level final states in the
framework of minimal supersymmetry. We make no simplifying assumptions about
the neutralino nor about sfermion masses and mixings other than the absence of
explicit CP--violating terms. The expressions should be particularly useful in
computing the neutralino WIMP relic abundance without the usual approximation
of partial wave expansion.


title: Implications of the CP asymmetry in semileptonic B decay

abstract:
  Recent experimental searches for $A_{SL}$, the CP asymmetry in semileptonic B
decay, have reached an accuracy of order one percent. Consequently, they give
meaningful constraints on new physics. We find that cancellations between the
Standard Model (SM) and new physics contributions to $B^0 - \bar B^0$ mixing
cannot be as strong as was allowed prior to these measurements. The predictions
for this asymmetry within the SM and within models of minimal flavor violation
(MFV) are below the reach of present and near future measurements. Including
order $m_c^2/m_b^2$ and $\Lambda_{QCD}/m_b$ corrections we obtain the SM
prediction: $-1.3 \times 10^{-3} < A_{SL} < -0.5 \times 10^{-3}$. Future
measurements can exclude not only the SM, but MFV as well, if the sign of the
asymmetry is opposite to the SM or if it is same-sign but much enhanced. We
also comment on the CP asymmetry in semileptonic $B_s$ decay, and update the
range of the angle $\beta_s$ in the SM: $0.026 < \sin2\beta_s < 0.048$.


title:
The form factors existing in the b->s g^* decay and the possible CP
  violating effects in the noncommutative standard model

abstract:
  We study the form factors appearing in the inclusive decay b -> s g^*, in the
framework of the noncommutative standard model. Here g^* denotes the virtual
gluon. We get additional structures and the corresponding form factors in the
noncommutative geometry. We analyse the dependencies of the form factors to the
parameter p\Theta k where p (k) are the four momenta of incoming (outgoing) b
quark (virtual gluon g^*, \Theta is a parameter which measures the
noncommutativity of the geometry. We see that the form factors are weakly


title:
S-Matrix Unitarity, Impact Parameter Profiles, Gluon Saturation and
  High-Energy Scattering

abstract:
  A model combining perturbative and non-perturbative QCD is developed to
compute high-energy reactions of hadrons and photons and to investigate
saturation effects that manifest the S-matrix unitarity. Following a functional
integral approach, the S-matrix factorizes into light-cone wave functions and
the universal amplitude for the scattering of two color-dipoles which are
represented by Wegner-Wilson loops. In the framework of the non-perturbative
stochastic vacuum model of QCD supplemented by perturbative gluon exchange, the
loop-loop correlation is calculated and related to lattice QCD investigations.
With a universal energy dependence motivated by the two-pomeron (soft + hard)
picture that respects the unitarity condition in impact parameter space, a
unified description of pp, pip, Kp, gamma* p, and gamma gamma reactions is
achieved in good agreement with experimental data for cross sections, slope
parameters, and structure functions. Impact parameter profiles for pp and
longitudinal gamma* p reactions and the gluon distribution of the proton
xG(x,Q^2,b) are calculated and found to saturate in accordance with S-matrix
unitarity. The c.m. energies and Bjorken x at which saturation sets in are
determined.


title: Ultra-high energy cosmic rays and new physics

abstract:
  Cosmic rays with energies beyond the Greisen-Zatsepin-Kuzmin `cutoff' at
$\sim 4 \times 10^{10}$ GeV pose a conundrum, the solution of which requires
either drastic revision of our astrophysical understanding, or new physics
beyond the Standard Model. Nucleons of such energies must originate within the
local supercluster in order to avoid excessive energy losses through photopion
production on the cosmic microwave background. However they do not point back
towards possible nearby sources, e.g. the active galaxy Cen A or M87 in the
Virgo cluster, so such an astrophysical origin requires intergalactic magnetic
fields to be a hundred times stronger than previously believed, in order to
isotropise their arrival directions. Alternatively the primaries may be high
energy neutrinos, say from distant gamma-ray bursts, which annihilate on the
local relic background neutrinos to create ``Z-bursts''. A related possibility
is that the primary neutinos may initiate the observed air showers directly if
their interaction cross-sections are boosted to hadronic strength through
non-perturbative physics such as TeV-scale quantum gravity. Or the primaries
may instead be new strongly interacting neutral particles with a longer mean
free path than nucleons, coming perhaps from distant BL-Lac objects or FR-II
radio galaxies. Yet another possibility is that Lorentz invariance is violated
at high energies thus suppressing the energy loss processes altogether. The
idea that has perhaps been studied in most detail is that such cosmic rays
originate from the decays of massive relic particles (``wimpzillas'') clustered
as dark matter in the galactic halo. All these hypotheses will soon be
critically tested by the Pierre Auger Observatory, presently under construction
in Argentina, and by proposed satellite experiments such as EUSO.


title:
Moduli problem and Q-ball baryogenesis in gauge-mediated SUSY breaking
  models

abstract:
  We investigate whether the Affleck-Dine mechanism can produce sufficient
baryon number of the universe in the gauge-mediated SUSY breaking models, while
evading the cosmological moduli problem by late-time entropy production. We
find that the Q-ball formation makes the scenario difficult, irrespective of
the detail mechanism of the entropy production.


title: Electromagnetic Form Factors of Nucleons in a Light-cone Diquark Model

abstract:
  We investigate the electromagnetic form factors of nucleons within a simple
relativistic quark spectator-diquark model using the light-cone formalism.
Melosh rotations are applied to both quark and vector diquark. It is shown that
the difference between vector and scalar spectator diquarks reproduces the
right electric form factor of neutrons, and both the form factors $G_E(Q^2)$
and $G_M(Q^2)$ of the proton and neutron agree with experimental data well up
to $Q^2=2 ~\rm{GeV}^2$ in this simple model.


title: Loop effects and non-decoupling property of SUSY QCD in $g b\to tH^{-}$

abstract:
  One-loop SUSY QCD radiative correction to $gb \to tH^{-}$ cross section is
calculated in the Minimal Supersymmetric Standard Model. We found that SUSY QCD
is non-decoupling if the gluino mass and the parameter $\mu$, $A_t$ or $A_b$
are at the same order and get large. The non-decoupling contribution can be
enhanced by large $\tan\beta$ and therefore large corrections to the hadronic
production rates at the Tevatron and LHC are expected in the large $\tan\beta$
limit. The fundamental reason for such non-decoupling behavior is found to be
some couplings in the loops being proportional to SUSY mass parameters.


title: The Decay Lifetime of Polarized Fermions in Flight

abstract:
  Based on the parity violation in Standard model, we study the dependence of
lifetime on the helicity of an initial-state fermion in weak interactions. It
is pointed out that if the initial fermions in the decays are longitudinally
polarized, then the decay lifetime of left-handed polarized fermions is
different from that of right-handed polarized fermions in flight with a same
velocity in a same inertial system.


title:
The systematic study of $B\to \pi$ form factors in pQCD approach and its
  reliability

abstract:
  The study of exclusive B decays in perturbative QCD are complicated by the
endpoint problem. In order to perform the perturbative calculation, the Sudakov
effects are introduced to regulate the endpoint singularity. We provide a
systematic analysis with leading and next-to-leading twist corrections for
$B\to\pi$ form factors in pQCD approach. The intrinsic transverse momentum
dependence of hadronic wave function and threshold resummation effects are
included in pQCD approach. There are two leading twist B meson distribution
amplitudes (or generally wave functions) in general. The QCD equations of
motion provide important constraints on B meson wave functions. The reliability
of pQCD approach in \bpi form factors is discussed. 70% of the result comes
from the region $\alpha_s(t)/\pi<0.2$ and 38% comes from the region where the
momentum transfer $t\geq 1\GeV$. The conceptual problems of pQCD approach are
discussed in brief. Our conclusion is that pQCD approach in the present form
cannot provide a precise prediction for \bpi transition form factors.


title: Charmless Non-Leptonic B Decays and R-parity Violating Supersymmetry

abstract:
  We examine the charmless hadronic B decay modes in the context of R-parity
violating ($\rpv$) supersymmetry. We try to explain the large branching ratio
(compared to the Standard Model (SM) prediction) of the decay $B^{\pm}\to \eta'
K^{\pm}$. There exist data for other observed $\eta^{(\prime)}$ modes and among
these modes, the decay $B^{0}\to \eta K^{*0}$ is also found to be large
compared to the SM prediction. We investigate all these modes and find that
only two pairs of $\rpv$ coupling can satisfy the requirements without
affecting the other $B\ra PP$ and $B\ra VP$ decay modes barring the decay
$B\ra\phi K$. From this analysis, we determine the preferred values of the
$\rpv$ couplings and the effective number of color $N_c$. We also calculate the
CP asymmetry for the observed decay modes affected by these new couplings.


title: Basic Parameters and Some Precision Tests of the Standard Model

abstract:
  We present a review of the masses (except for neutrino masses) and
interaction strengths in the standard model. Special emphasis is put on
quantities that have been determined with significantly improved precision in
the last few years. In particular, a number of determinations of $\alpha_s$ and
the electromagnetic coupling on the $Z$, $\alpha_{\rm QED}(M_Z^2)$ are
presented and their implications for the Higgs mass discussed; the best
prediction that results for this last quantity being $$M_H=102^{+54}_{-36}
GeV/c^2.$$ Besides this, we also discuss a few extra precision tests of the
standard model: the electron magnetic moment and dipole moment, and the muon
magnetic moment.


title:
Scanning of the e+e- to pi+pi- cross--section below 1 GeV by radiative
  events with untagged photon

abstract:
  We discuss an inclusive approach to the measurement of the e+e- --> pi+ pi-
cross--section by the radiative return method without photon tagging. The
essential part of this approach is the choice of rules for event selection
which provide rejection of events with 3 (or more) pions and decrease the
final--state radiation background. The radiative corrections to the
initial--state radiation process are computed for DAPhNE conditions, using the
quasi--real electron approximation for both, the cross--section and the
underlying kinematics. The two cases of restricted and unrestricted pion phase
space are considered. Some numerical calculations illustrate our analytical
results.


title: Neutrino mass due to the neutrino-gaugino mixing

abstract:
  We study a possibility to explain neutrino masses and mixings based on
supersymmetry. If we introduce a flavor diagonal but generation dependent extra
U(1) gauge interaction at a TeV region, we can obtain masses and mixings of
neutrinos required for the explanation of both solar and atmospheric neutrinos.
In this model, differently from the usual bilinear R-parity violating scenario,
the neutrino mass degeneracy can be resolved at a tree level by the
neutrino-gaugino mixing caused by an R-parity violation. The model is
straightforwardly extended to include the quark sector by introducing an
anomalous U(1) which can be used for the Froggatt-Nielsen mechanism.


title:
Sfermion Mass Degeneracy, Superconformal Dynamics and Supersymmetric
  Grand Unified Theories

abstract:
  We discuss issues in a scenario that hierarchical Yukawa couplings are
generated through strong dynamics of superconformal field theories (SCFTs).
Independently of mediation mechanism of supersymmetry breaking, infrared
convergence property of SCFTs can provide an interesting solution to
supersymmetric flavor problem; sfermion masses are suppressed around the
decoupling scale of SCFTs and eventually become degenerate to some degree,
thanks to family-independent radiative corrections governed by the SM gaugino
masses. We discuss under what conditions the degeneracy of sfermion mass can be
estimated in a simple manner. We also discuss the constraints from lepton
flavor violations. We then study explicitly sfermion mass degeneracy within the
framework of grand unified theories coupled to SCFTs. It is found that the
degeneracy for right-handed sleptons becomes worse in the conventional SU(5)
model than in the MSSM. On the other hand, in the flipped SU(5) \times U(1)
model, each right-handed lepton is still an SU(5)-singlet, whereas the bino
mass M_1 is determined by two independent gaugino masses of SU(5) \times U(1).
These two properties enable us to have an improved degeneracy for the
right-handed sleptons. We also speculate how further improvement can be
obtained in the SCFT approach.


title:
Equivalent sets of solutions of the Klein-Gordon equation with a
  constant electric field

abstract:
  In connection with the problem of choosing the in- and out-states among the
solutions of a wave equation with one-dimensional potential we study
nonstationary and "stationary" families of complete sets. A nonstationary set
consists of the solutions with the quantum number $p_v=p^0v-p_3.$ It can be
obtained from the nonstationary set with quantum number $p_3$ by a boost along
$x_3$-axis (along the direction of the electric field) with velocity $-v$. By
changing the gauge the solutions in all sets can be brought to one and the same
potential without changing quantum numbers. Then the transformations of
solutions of one set (with quantum number $p_v$) to the solutions in another
set (with quantum number $p_{v'}$) have the group properties.
  The "stationary" solutions and sets possess the same properties as the
nonstationary ones and are obtainable from stationary solutions with quantum
number $p^0$ by the same boost.
  It turns out that any set can be obtained from any other by gauge
manipulations. So all sets are equivalent and the classification (i.e.
ascribing the frequency sign and in-, out- indexes) in any set is determined by
the classification in $p_3$-set, where it is evident.


title: What Have We Learned from RHIC?

abstract:
  In this talk, I present what I believe we have learned from the recent RHIC
heavy ion experiments. The goal of these experiments is to make and study
matter at very high energy densities, greater than an order of magnitude larger
than that of nuclear matter. Have we made such matter? What have we learned
about the properties of this matter? What do we hope and expect to learn in the
future?


title: Debye Screening at Finite Temperature, Revisited

abstract:
  We present an alternative way to calculate the screening of the static
potential between two charges in (non)abelian gauge theories at high
temperatures. Instead of a loop expansion of a gauge boson self-energy, we
evaluate the energy shift of the vacuum to order e^2 after applying an external
static magnetic field and extract a temperature- and momentum-dependent
dielectric permittivity. The Hard Thermal Loop (HTL) gluon and photon Debye
masses are recovered from the lowest lying Landau levels of the perturbed
vacuum. In QED, the complete calculation exhibits an interesting cancellation
of terms, resulting in a logarithmic running alpha(T). In QCD, a Landau pole in
alpha_s arises in the infrared from the sign of the gluon contribution, as in
more sophisticated thermal renormalization group calculations.


title:
Instanton Contribution to the Pion Electro-Magnetic Formfactor at Q^2 >
  1 GeV^2

abstract:
  We study the effects of instantons on the charged pion electro-magnetic
formfactor at intermediate momenta. In the Single Instanton Approximation
(SIA), we predict the pion formfactor in the kinematic region Q^2=2-15 GeV^2.
By developing the calculation in a mixed time-momentum representation, it is
possible to maximally reduce the model dependence and to calculate the
formfactor directly. We find the intriguing result that the SIA calculation
coincides with the vector dominance monopole form, up to surprisingly high
momentum transfer Q^2~10 GeV^2. This suggests that vector dominance for the
pion holds beyond low energy nuclear physics.


title:
Non-factorizable terms, heavy quark masses, and semileptonic decays of D
  and B mesons

abstract:
  The non-factorizable terms in the operator product expansion have been
recognized as one of theoretical obstacles for precision determination of the
mixing parameter $V_{ub}$ from semileptonic B decays. It is pointed out here
that the recent CLEO data on the parameters of the heavy quark expansion
$\lambda_1$ and ${\bar \Lambda}$, combined with a theoretical bound on
$\lambda_1$ strongly favor the existence of a sizeable contribution of
non-factorizable terms in semileptonic decays of $D$ mesons. Thus these terms
are likely to solve the long-standing problem of the deficit of semileptonic
decay rate of the $D$ mesons, and with better data their magnitude can be
determined and used in studies of the parameter $V_{ub}$.


title: Nuclear Effects on Heavy Boson Production at RHIC and LHC

abstract:
  We predict W and Z transverse momentum distributions from proton-proton and
nuclear collisions at RHIC and LHC. A resummation formalism with power
corrections to the renormalization group equations is used. The dependence of
the resummed QCD results on the non-perturbative input is very weak for the
systems considered. Shadowing effects are discussed and found to be unimportant
at RHIC, but important for LHC. We study the enhancement of power corrections
due to multiple scattering in nuclear collisions and numerically illustrate the
weak effects of the dependence on the nuclear mass.


title: Leptogenesis, CP violation and neutrino data: What can we learn?

abstract:
  A detailed analytic and numerical study of baryogenesis through leptogenesis
is performed in the framework of the standard model of electroweak interactions
extended by the addition of three right-handed neutrinos, leading to the seesaw
mechanism. We analyze the connection between GUT-motivated relations for the
quark and lepton mass matrices and the possibility of obtaining a viable
leptogenesis scenario. In particular, we analyze whether the constraints
imposed by SO(10) GUTs can be compatible with all the available solar,
atmospheric and reactor neutrino data and, simultaneously, be capable of
producing the required baryon asymmetry via the leptogenesis mechanism. It is
found that the Just-So^2 and SMA solar solutions lead to a viable leptogenesis
even for the simplest SO(10) GUT, while the LMA, LOW and VO solar solutions
would require a different hierarchy for the Dirac neutrino masses in order to
generate the observed baryon asymmetry. Some implications on CP violation at
low energies and on neutrinoless double beta decay are also considered.


title: Dynamics of tachyonic preheating after hybrid inflation

abstract:
  We study the instability of a scalar field at the end of hybrid inflation,
using both analytical techniques and numerical simulations. We improve previous
studies by taking the inflaton field fully into account, and show that the
range of unstable modes depends sensitively on the velocity of the inflaton
field, and thereby on the Hubble rate, at the end of inflation. If topological
defects are formed, their number density is determined by the shortest unstable
wavelength. Finally, we show that the oscillations of the inflaton field
amplify the inhomogeneities in the energy density, leading to local symmetry
restoration and faster thermalization. We believe this explains why tachyonic
preheating is so effective in transferring energy away from the inflaton zero
mode.


title: Electroweak Corrections to the Decays of Stop and Gluino

abstract:
  The electroweak corrections at the order of $O(\alpha_{ew}m_{t(b)}^2/m_W^2)$
to the partial widths of the $\tilde{t}_2 \to \tilde{g} + t$ and $\tilde{g} \to
\tilde{t}_1 + \bar{t} $ decays (depending on the masses of the particles
involved) are investigated within the Supersymmetric Standard Model. The
relative corrections can reach the value of 10% in some parameter space, which
can be comparable with the corresponding QCD corrections. Therefore, they
should be taken into account for the precise experimental measurement at future
colliders.


title:
From novel mathematics to efficient algorithms. Do we have proper SD
  foundation to build future?

abstract:
  Computer implementation of sophisticated algorithms for physics applications
is greatly facilitated by the new generation of component-oriented SD
technologies pioneered by Wirth's Oberon and embraced by the software industry
(Sun's Java and Microsoft's C#). In a stark contrast with the deeply flawed
C++, the Oberon technologies (specifically, the Component Pascal and the
BlackBox development environment) offer an unparalleled SD platform for
building scientific applications from sophisticated data processing to
demanding symbolic calculations. Specific examples are discussed.


title:
Model-independent Constraint on the Neutrino Mass Spectrum from the
  Neutrinoless Double Beta Decay

abstract:
  We present a concise formula to relate the effective mass term of the
neutrinoless double beta decay to a single neutrino mass, two Majorana
CP-violating phases and four observables of neutrino oscillations for a generic
neutrino mass spectrum. If the alleged evidence for the neutrinoless double
beta decay is taken into account, one may obtain a rough but model-independent
constraint on the absolute scale of neutrino masses -- it is most likely to be
in the range between 0.1 eV and 1 eV.


title: Reduction of XXZ model with generalized periodic boundary conditions

abstract:
  We examine the XXZ model with generalized periodic boundary conditions and
identify conditions for the truncation of the functional fusion relations of
the transfer matrix fusion. After the truncation, the fusion relations become a
closed system of functional equations. The energy spectrum can be obtained by
solving these equations. We obtain the explicit form of the Hamiltonian
eigenvalues for the special case where the anisotropy parameter $q^4=-1.


title: A relation between CP violation of low energy and leptogenesis

abstract:
  We discuss how CP violation generating lepton number asymmetry can be related
to CP violation in low energy.


title: Effective Description of QCD at Very High Densities

abstract:
  We describe the effective lagrangian approach to the color superconductivity.
The effective description that arises if one considers only the leading terms
in the expansion for very high densities is particularly simple. It is based on
a lagrangian whose effective fermion fields are velocity-dependent; moreover
strong interactions do not change quark velocity and the effective lagrangian
does not contain spin matrices. All these features render the effective theory
similar to the Heavy Quark Effective Theory, which is the limit of Quantum
ChromoDynamics for infinite quark masses. For this reason one can refer to the
effective lagrangian at high density as the High Density Effective Theory
(HDET). In some cases HDET results in analytical, though approximate, relations
that are particularly simple to handle. After a pedagogical introduction,
several topics are considered. They include the treatment of the
Color-Flavor-Locking and the 2SC model, with evaluation of the gap parameters
by the Nambu-Gorkov equations, approximate dispersion laws for the gluons and
calculations of the Nambu-Goldstone Bosons properties. We also discuss the
effective lagrangian for the crystalline color superconductive (LOFF) phase and
we give a description of the phonon field related to the breaking of the
rotational and translational invariance. Finally a few astrophysical
applications of color superconductivity are discussed.


title:
Investigation of noscale supersymmetry breaking models with a gauged
  U(1)_{B-L} symmetry

abstract:
  Noscale supersymmetry (SUSY) breaking model is investigated in the minimal
extension of the minimal supersymmetric standard model (MSSM) with a gauged
U(1)_{B-L} symmetry. We specifically consider a unification-inspired model with
the gauge groups SU(3)_{C} \times SU(2)_{L} \times U(1)_Y \times U(1)_{B-L}
\subset SU(5) \times U(1)_{5} for illustration. While the noscale boundary
condition at the grand unification scale (M_{G}\simeq 2\times 10^{16} GeV) in
the MSSM is not consistent with phenomenological constraints, we show that it
is if the gaugino of the U(1)_{5} multiplet is several times heavier than the
gauginos of the MSSM. However, if SU(5) \times U(1)_{5} is further embedded in
a larger simple group, e.g. SO(10), the noscale boundary condition at M_{G} is
inconsistent with phenomenological constraints. If we relax the noscale
boundary condition and allow non-zero soft scalar masses for the Higgs fields
which spontaneously break the U(1)_{5} symmetry, the resultant spectrum of SUSY
particles becomes consistent with all the phenomenological constraints, even if
we impose the GUT relation on the gauge coupling and the gaugino mass of the
U(1)_{5}. In this case, the SUSY CP problem is also solved, since the condition
B\mu =0 at the boundary can be imposed consistently with the electroweak
symmetry breaking.


title:
Analysis of the Neutralino System in Supersymmetric Theories -- Addendum
  --

abstract:
  In the preceding reference [CKMZ] we have shown how the fundamental gaugino
and higgsino parameters of the chargino and neutralino system in supersymmetric
theories can be determined in high--precision experiments at $e^+e^-$ linear
colliders. Within the Minimal Supersymmetric Standard Model these parameters
can be reconstructed completely even if only the light charginos
$\tilde{\chi}^\pm_1$ and the light neutralinos $\tilde{\chi}^0_1$ and
$\tilde{\chi}^0_2$ are kinematically accessible in the initial phase of these
machines, as demonstrated in this Addendum.


title: Hidden Mass Hierarchy in QCD

abstract:
  We discuss implications of the recent measurements of the non-Abelian action
density associated with the monopoles condensed in the confining phase of
gluodynamics. The radius of the monopole determined in terms of the action was
found to be small numerically. As far as the condensation of the monopoles is
described in terms of a scalar field, a fine tuning is then implied. In other
words, a hierarchy exists between the self energy of the monopole and the
temperature of the confinement-deconfinement phase transition. The ratio of the
two scales is no less than a factor of 10. Moreover, we argue that the
hierarchy scale can well eventually extend to a few hundred GeV on the
ultraviolet side. The corresponding phenomenology is discussed, mostly within
the polymer picture of the monopole condensation.


title:
Classical Behaviour After a Phase Transition: II. The Formation of
  Classical Defects

abstract:
  Classical defects (monopoles, vortices, etc.) are a characteristic
consequence of many phase transitions of quantum fields. Most likely these
include transitions in the early universe and such defects would be expected to
be present in the universe today. We continue our analysis of the onset of
classical behaviour after a second-order phase transition in quantum field
theory and show how defects appear after such transitions


title:
Classical Behaviour After a Phase Transition: I. Classical Order
  Parameters

abstract:
  We analyze the onset of classical field configurations after a phase
transition. Firstly, we motivate the problem by means of a toy model in quantum
mechanics. Subsequently, we consider a scalar field theory in which the
system-field interacts with its environment, represented both by further scalar
fields and by its own short-wavelength modes. We show that, for very rapid
quenches, the order parameter can be treated classically by the time that it
has achieved its ground state values (spinodal time).


title: Supersymmetric Lepton Flavour Violation

abstract:
  In supersymmetric models new sources of lepton flavour violation (LFV) may
enhance the rates of charged lepton flavour violating processes, like mu to e
gamma, and generate distinct final states at future colliders, e.g. tau mu +
jets + missing energy. We discuss the role of chargino pair production for the
LFV signals at e+e- colliders.


title:
Direct CP asymmetry of b -> s gamma and b -> d gamma in models beyond
  the Standard Model

abstract:
  We study the direct CP asymmetry of the decays b -> s gamma and b -> d gamma
in the context of two models: i) a supersymmetric (SUSY) model with
unconstrained SUSY phases, and ii) a model with a single generation of vector
quarks. In both the above models we show that b -> d gamma can sizeably
influence the combined asymmetry (i.e. that of a sample containing both b -> s
gamma and b -> d gamma), and in case (ii) may in fact be the dominant
contribution.


title: CP violation in open ttbar production at a linear collider

abstract:
  CP-violating asymmetries in the processes e+e- -> t tbar and gamma gamma ->
ttbar can provide information about CP-violating couplings of the top quark,
whose presence would signal physics beyond the standard model. Work on studies
of different asymmetries has been described. Special emphasis has been laid on
asymmetries in charged lepton distributions arising from top decay. The effect
of longitudinal beam polarization has been discussed. Limits possible on the
electric dipole moment of the top quark from different angular asymmetries have
been obtained.


title: The Uses of Chiral Anomaly for Determination of the Number of Colors

abstract:
  The $N_c$-dependence of the vertices $PPP\gamma$, where $P$ is a pseudoscalar
meson and $N_c$ is the number of colors, is analyzed with regard for the
$N_c$-dependence of the quark charges. It is shown that the best processes for
the determination of $N_c$ are the reactions $K\gamma \to K\pi$ and
$\pi^pm\gamma\to\pi^\pm\eta$ as well as the decay $\eta\ra\pi^+\pi^-\gamma$.
The measurement of the cross section $\sigma(\pi^-\gamma\ra\pi^-\eta)$ at the
VES facility at the IHEP agrees with the value $N_c=3$.


title:
Contribution to muon g-2 from the \pi0\gamma and \eta\gamma intermediate
  states in the vacuum polarization

abstract:
  Using new experimental data, we have calculated the contribution to the
anomalous magnetic moment of the muon from the \pi0\gamma and \eta\gamma
intermediate states in the vacuum polarization with high precision:
a{\mu}(\pi0\gamma)+a{\mu}(\eta\gamma)=(54.7\pm 1.5)\times 10^{-11}. We have
also found the small contribution from e+e-\pi0, e+e-\eta and \mu+\mu-\pi0
intermediate states equal to 0.5\times 10^{-11}.


title:
Confusing non-standard neutrino interactions with oscillations at a
  neutrino factory

abstract:
  Most neutrino mass theories contain non-standard interactions (NSI) of
neutrinos which can be either non-universal (NU) or flavor-changing (FC). We
study the impact of such interactions on the determination of neutrino mixing
parameters at a neutrino factory using the so-called ``golden channels''
\pnu{e}\to\pnu{\mu} for the measurement of \theta_{13}. We show that a certain
combination of FC interactions in neutrino source and earth matter can give
exactly the same signal as oscillations arising due to \theta_{13}. This
implies that information about \theta_{13} can only be obtained if bounds on
NSI are available. Taking into account the existing bounds on FC interactions,
this leads to a drastic loss in sensitivity in \theta_{13}, at least two orders
of magnitude. A near detector at a neutrino factory offers the possibility to
obtain stringent bounds on some NSI parameters. Such near site detector
constitutes an essential ingredient of a neutrino factory and a necessary step
towards the determination of \theta_{13} and subsequent study of leptonic CP
violation.


title:
CP Asymmetry in Tau Slepton Decay in The Minimal Supersymmetric Standard
  Model

abstract:
  We investigate CP violation asymmetry in the decay of tau slepton into a tau
neutrino and a chargino in the minimal supersymmetric standard model. The new
source of CP violation is the complex mixing in the tau slepton sector. The
rate asymmetry between the decays of tau slepton and its CP conjugate process
can be of order of $10^{-3}$ in some region of the parameter space of the
mSUGRA scenario, which will possibly be detectable in the near-future collider
experiments.


title: E_6 Unification, Doublet-Triplet Splitting and Anomalous U(1)_A Symmetry

abstract:
  We propose a natural Higgs sector in E_6 grand unified theory (GUT) with
anomalous U(1)_A gauge symmetry. In the scenario, the doublet-triplet splitting
can be realized while the proton decay via dimension 5 operator is suppressed.
The gauge coupling unification is also realized without finetuning. The GUT
scale is generally lower than the usual GUT scale 2\times 10^{16} GeV, the
proton decay via dimension 6 operator can be seen in near future experiment.
The lifetime of nucleon in the model is roughly estimated as \tau_p(p\to
e^+\pi^0)\sim 3\times 10^{33} years. It is shown that the Higgs sector is
compatible with the matter sector proposed by one of the authors, which
reproduces the realistic quark and lepton mass matrices including bi-large
neutrino mixing angle. Combining the Higgs sector and the matter sector, we can
obtain the totally consistent E_6 GUT. The input parameters are only 8 integer
anomalous U(1)_A charges (+3 for singlet Higgs) for the Higgs sector and 3
(half) integer charges for the matter sector.


title: Total Cross Sections of e+ e- --> hadrons and pQCD Tests

abstract:
  In the light of recent muon (g-2) result by the E821 experiment at BNL, the
importance of and interest in the total hadronic cross sections in e+ e-
collisions and R(e+ e- --> hadrons) have been heightened. We report on the
integrated data compilation of available data of e+ e- --> hadrons, transformed
to a unique and meaningful style that implements the pure QED radiative
corrections, from the PPDS and HEPDATA databases by the COMPETE Group. In
particular, the continuum data sets are extracted where the direct comparison
of the parton models and different variants of the pQCD corrections can be made
and which will be useful for the future refinements of alpha_s(Q^2) and
alpha_QED(Q^2).


title:
Photon Colliders in Physical Program for Large Colliders. Talk given at
  Workshop on Electromagnetic Probes of Fundamental Physics, Eriche, Sicily,
  16-21 October 2001

abstract:
  In this report our main attention is focused on the problems which can be
solved at Photon Colliders naturally but are hardly solved at LHC and e^+e^-
Linear Collider: The New Physics - new particles, new interactions,
supersymmetry, Dirac monopole, extra dimensions... SM and the case of a
SM--like scenario - EWSB, Higgs bosons, anomalies in interactions of gauge
bosons, QCD, Pomeron and odderon... By-product: Production of light Goldstone
particles from region of e\to\gamma conversion.


title: Mesons in a Poincare Covariant Bethe-Salpeter Approach

abstract:
  We develop a covariant approach to describe the low-lying scalar,
pseudoscalar, vector and axialvector mesons as quark-antiquark bound states.
This approach is based on an effective interaction modeling of the
non--perturbative structure of the gluon propagator that enters the quark
Schwinger-Dyson and meson Bethe-Salpeter equations. We consistently treat these
integral equations by precisely implementing the quark propagator functions
that solve the Schwinger-Dyson equations into the Bethe-Salpeter equations in
the relevant kinematical region. We extract the meson masses and compute the
pion and kaon decay constants. We obtain a quantitatively correct description
for pions, kaons and vector mesons while the calculated spectra of scalar and
axialvector mesons suggest that their structure is more complex than being
quark-antiquark bound states.


title:
Charged lepton Flavor Violation in Supersymmetry with Bilinear R-Parity
  Violation

abstract:
  The simplest unified extension of the Minimal Supersymmetric Standard Model
with bi-linear R-parity violation naturally predicts a hierarchical neutrino
mass spectrum, suitable to explain atmospheric and solar neutrino fluxes. We
study whether the individual violation of the lepton numbers L_{e,mu,tau} in
the charged sector can lead to measurable rates for BR(mu->e gamma)and
$BR(tau-> mu gamma). We find that some of the R-parity violating terms that are
compatible with the observed atmospheric neutrino oscillations could lead to
rates for mu->e gamma measurable in projected experiments. However, the Delta
m^2_{12} obtained for those parameters is too high to be compatible with the
solar neutrino data, excluding therefore the possibility of having measurable
rates for mu->e gamma in the model.


title: Precision Test of Quark Mass Textures: A Model Independent Approach

abstract:
  Using a Monte Carlo method, we have directly extracted from the available
measurements, the hierarchies among the different elements of the quark mass
matrices. To do that, we have first introduced a model independent
parameterization for two generic class of models: those based on Abelian
symmetries and those inspired by a U(2) horizontal symmetry. So, matrix entries
are proportional to some epsilon^t, with epsilon<<1 and the t's are different
free exponents that we determine from the data through a statistically well
defined procedure. We have found that the experimental data poorly constrain
the Abelian scenarios. Instead, in non Abelian scenarios, these t-exponents are
strongly constrained by the present data. We have found that contrary to a
naive U(2) horizontal symmetry expectation, quark mass matrices turn out to be
not symmetric. Two solutions emerge: one with M_{32}^{{down}}>> M_{23}^{down}}
and M_{21}^{up}>> M_{12}^{{up}}; and a second one with slight asymmetries only
in the light quark sector, namely M_{21}^{up} < M_{12}^{up} and
M_{21}^{down}>M_{12}^{down}.


title: Exclusive non-leptonic B meson decays from QCD

abstract:
  A brief report on the QCD factorization approach to exclusive B decays and
its applications is presented. In an appendix a subtle issue concerning partial
integration in the parameterization of infrared-sensitive power corrections is
clarified.


title:
Charged particle fluctuations and microscopic models of nuclear
  collisions

abstract:
  We study the event-by-event fluctuations of the charged particles and compare
the results of different Monte-Carlo Generators (MCG): VNIb, HIJING,
HIJING/B${\bar B}$ and RQMD. We find that the $D$-measure can be used to
distinguish between the different gluon populations that are present in the MCG
models. On the other hand, the value of the $D$-measure shows high sensitivity
to the rescattering effects in VNIb model, but lower sensitivity to the
rescattering effects in RQMD model. We also find that the $D$-measures from AA
are consistent with the $D$-measures from $pp$ for all generators except VNIb.
Therefore, any deviation among the values of $D$-measure for different impact
parameters and between
  $pp$ and $AA$ collisions may indicate that either the rescattering effects
play a key role in the interactions or there is new physics in $AA$ collisions.


title: Neutrino Masses and Mixing: Evidence and Implications

abstract:
  Measurements of various features of the fluxes of atmospheric and solar
neutrinos have provided evidence for neutrino oscillations and therefore for
neutrino masses and mixing. We review the phenomenology of neutrino
oscillations in vacuum and in matter. We present the existing evidence from
solar and atmospheric neutrinos as well as the results from laboratory
searches, including the final status of the LSND experiment. We describe the
theoretical inputs that are used to interpret the experimental results in terms
of neutrino oscillations. We derive the allowed ranges for the mass and mixing
parameters in three frameworks: First, each set of observations is analyzed
separately in a two-neutrino framework; Second, the data from solar and
atmospheric neutrinos are analyzed in a three active neutrino framework; Third,
the LSND results are added, and the status of accommodating all three signals
in the framework of three active and one sterile light neutrinos is presented.
We review the theoretical implications of these results: the existence of new
physics, the estimate of the scale of this new physics and the lessons for
grand unified theories, for supersymmetric models with R-parity violation, for
models of extra dimensions and singlet fermions in the bulk, and for flavor
models.


title: Thermal model at RHIC: particle ratios and pT spectra

abstract:
  Predictions of the single-freeze-out model for the particle spectra at RHIC
are presented. The model assumes that the chemical and thermal freeze-outs
occur simultaneously, and incorporates in simple terms the longitudinal and
transverse flow. All resonance decays are included. The model predictions and
the data are in striking agreement in the whole available range of momenta.


title:
Cherenkov radiation and pair production by particles traversing laser
  beams

abstract:
  It is shown that Cherenkov radiation can be observed at TESLA in electron
collisions with optical laser pulses. The prospects for it to be observed at
SLC, LEP, LHC and RHIC are discussed. The conclusions are compared with results
for pair production.


title: Study of the K- -> mu- nu pi0 decay

abstract:
  The decay $K^{-} \to \mu^{-} \bar{\nu} \pi^{0}$ has been studied using
in-flight decays detected with ``ISTRA+'' setup operating in the 25 GeV
negative secondary beam of the U-70 PS. About 112K events were used for the
analysis. The $\lambda_{+}$ and $\lambda_{0}$ slope parameters of the decay
formfactors $f_{+}(t)$, $f_{0}(t)$ have been measured :
  $\lambda_{+}= 0.0321 \pm 0.004$(stat) $\pm 0.002$(syst)
  $\lambda_{0}= 0.0209 \pm 0.004$(stat) $\pm 0.002$(syst); the correlation $d
\lambda_{0}/d \lambda_{+}=-0.46$ The limits on the possible tensor and scalar
couplings have been derived:
  $f_{T}/f_{+}(0)=-0.021 \pm 0.028$(stat) $\pm 0.014$(theory);
  $f_{S}/f_{+}(0)=0.004 \pm 0.005$(stat) $\pm 0.005$(theory)


title:
Probing CKM parameters through unitarity, \epsilon_K and \Delta
  m_{B_{d,s}}

abstract:
  The unitarity based analysis carried out in hep-ph/0106161, involving the
evaluation of Jarlskog's rephasing invariant parameter J and the angles of the
unitarity triangle is extended to include the effects of K^0-\bar K^0 and
B^0-\bar B^0 mixings. The present analysis attempts to evaluate CP violating
phase \delta, V_{td} and the angles of the unitarity triangle by invoking the
constraints imposed by unitarity, K^0 -\bar K^0 and B^0 -\bar B^0 mixings
separately as well as collectively, using the "full scanning" of input
parameters. Interestingly, our results indicate that the lower limit of \delta
is mostly determined by unitarity, while the upper limit is governed by
constraints from \Delta m_{B_d}. Our analysis yields sin2\beta=0.50-0.88, which
is in agreement with the BABAR results, however has marginal overlap only with
the lower limit of recent BELLE results.


title: The Phase of Neutrino Oscillations

abstract:
  Using an analogy with the well-known double-slit experiment, we show that the
standard phase of neutrino oscillations is correct, refuting recent claims of a
factor of two correction. We also improve the wave packet treatment of neutrino
oscillations taking into account explicitly the finite coherence time of the
detection process.


title: A predictive scheme for neutrino masses

abstract:
  The solar and atmospheric data and possibly large value for the effective
neutrino mass in neutrinoless double beta decay experiment together indicate
that all the three neutrinos are nearly degenerate. A verifiable texture for
the neutrino mass matrix is proposed to accommodate these results. This texture
allows almost degenerate neutrino masses two of which are exactly degenerate at
tree level. The standard model radiative corrections lift this degeneracy and
account for the solar deficit. The solar scale is correlated with the effective
neutrino mass $m_{ee}$ probed in neutrinoless double beta decay experiments.
The model can accommodate a large value of O(eV) for $m_{ee}$. Six observables
corresponding to three neutrino masses and three mixing angles are determined
in terms of only three unknown parameters within the proposed texture.


title:
Possibility of parametrization of atmospheric muon angular flux using
  underwater data

abstract:
  We present the formula for angular distribution of integral flux of
conventional ($\pi, K$) muons deep under water taking into account the
sphericity of the atmosphere and fluctuations of muon energy losses.The
accuracy of this formula for various sea level muon spectra is discussed. The
possibility of reconstructing two parameters of sea level spectrum by fitting
measured underwater angular intensity is shown for Baikal Neutrino Telescope
NT--36 experimental data.


title: Redefining Spinors in Lorentz-Violating QED

abstract:
  An analysis of spinor redefinitions in the context of the Lorentz-violating
QED extension is performed. Certain parameters that apparently violate Lorentz
invariance are found to be physically irrelevant as they can be removed from
the lagrangian using an appropriate redefinition of the spinor field
components. It is shown that conserved currents may be defined using a modified
action of the complex extension of the Lorentz group on the redefined spinors.
This implies a natural correspondence between the apparently Lorentz-violating
theory and conventional QED. Redefinitions involving derivatives are shown to
relate certain terms in the QED extension to lagrangians involving nonlocal
interactions or skewed coordinate systems. The redundant parameters in the QED
extension are identified and the lagrangian is rewritten in terms of physically
relevant coupling constants. The resulting lagrangian contains only physically
relevant parameters and transforms conventionally under Lorentz
transformations.


title:
Systematics of the Exclusive Meson Production in the Proton-Proton
  System in Relativistic Quark-Models

abstract:
  We investigate the exclusive production of the pseudoscalar mesons pi0, eta,
eta', K+ and of the vector mesons omega, phi in a microscopic gluon-exchange or
instanton model. We describe the baryons as covariant quark - scalar diquark
systems with harmonic confinement, thus taking into account center-of-mass
corrections and Lorentz contraction in different frames. The excitation of
intermediate baryon resonances is accounted by colorless 2-gluon (soft Pomeron)
exchange. We find that our model accounts for the systematics of the high
precision data on exclusive meson production from various modern proton
factories.


title: Towards a unique formula for neutrino oscillations in vacuum

abstract:
  We show that all correct results obtained by applying quantum field theory to
neutrino oscillations can be understood in terms of a single oscillation
formula. In particular, the model proposed by Grimus and Stockinger is shown to
be a subcase of the model proposed by Giunti, Kim and Lee, while the new
oscillation formulas proposed by Ioannisian and Pilaftsis and by Shtanov are
disproved. We derive an oscillation formula without making any relativistic
assumption and taking into account the dispersion, so that the result is valid
for both neutrinos and mesons. This unification gives a stronger
phenomenological basis to the neutrino oscillation formula. We also prove that
the coherence length can be increased without bound by more accurate energy
measurements. Finally, we insist on the wave packet interpretation of the
quantum field treatments of oscillations.


title:
Vector Meson Dominance Model for Radiative Decays Involving Light Scalar
  Mesons

abstract:
  We study a vector dominance model which predicts a fairly large number of
currently interesting decay amplitudes of the types S -> \gamma \gamma, V -> S
\gamma and S -> V \gamma, where S and V denote scalar and vector mesons, in
terms of three parameters. As an application, the model makes it easy to study
in detail a recent proposal to boost the ratio Gamma(phi -> f_0 gamma) /
Gamma(phi -> a_0 gamma) by including the isospin violating a_0 - f_0 mixing.
However we find that this effect is actually small in our model.


title: Measurement of the Width Difference of B_d Mesons

abstract:
  We estimate \Delta Gamma_d/\Gamma_d, including 1/m_b contributions and part
of the next-to-leading order QCD corrections, and find it to be around 0.3%. We
show the methods to measure \Delta Gamma_d/\Gamma_d by using at least two
different final states on the untagged B_d decay. The nonzero width difference
can also be used to identify new physics effects and to resolve a twofold
discrete ambiguity in the B_d-\bar{B}_d mixing phase. With the high statistics
and accurate time resolution of the upcoming LHC experiment, the measurement of
\Delta Gamma_d seems to be possible. This measurement would be important for an
accurate measurement of \sin2\phi_1 at the LHC. We also derive an upper bound
on the value of \Delta Gamma_d/\Gamma_d in the presence of new physics.


title: Hadrosynthesis at SPS and RHIC and the statistical model

abstract:
  An analysis of hadron abundances in heavy ion collisions from SPS to RHIC
energy within the statistical-thermal model is presented. Pb--Pb collisions at
40 A GeV are analysed for the first time here. Unlike stated in similar recent
studies, the data analysis rules out a complete strange chemical equilibrium in
full phase space. In fact, the use of multiplicities integrated in full phase
space or in a limited rapidity window at SPS energy gives rise to different
results for the extra-strangeness suppression parameter gamma_S while the
extracted values of temperature and baryon-chemical potential do not vary
significantly. This behaviour rises the question whether the observed hadronic
strangeness phase space saturation at RHIC within a small mid-rapidity window
would hold in a possible full phase space analysis.


title:
Production of ultra-energetic cosmic rays through the decay of
  super-heavy X particles

abstract:
  We present a new and complete numerical analysis of the decay of super-heavy
X particles, assumed to be the origin of cosmic rays with energy beyond the GZK
cut-off. The decay of X initiates a ``parton shower'', where we include all
degrees of freedom contained in the Minimal Supersymmetric Standard Model
(MSSM). Since at energies near $M_X$ all gauge couplings are of similar
magnitude, we include all of them, as well as third generation Yukawa
couplings. Technically the shower development is described through the DGLAP
evolution of the relevant fragmentation functions (FFs). We also carefully
treat the decay of the superparticles as well as heavy SM particles created in
the shower. Nonperturbative physics is parameterized through the input values
of the FFs, which we take from the literature. The final result is the the
complete spectrum of all stable particles at the very end of the shower :
protons, electrons, neutrinos, photons and neutralinos, for an energy range
from $10^{-7} M_X$ to $M_X$. In particular, the flux of high-energy neutralinos
is sizable ; it might serve as ``smoking gun'' signature for this kind of
scenario.


title: Multiplicative renormalizability and quark propagator

abstract:
  The renormalized Dyson-Schwinger equation for the quark propagator is
studied, in Landau gauge, in a novel truncation which preserves multiplicative
renormalizability. The renormalization constants are formally eliminated from
the integral equations, and the running coupling explicitly enters the kernels
of the new equations. To construct a truncation which preserves multiplicative
renormalizability, and reproduces the correct leading order perturbative
behavior, non-trivial cancellations involving the full quark-gluon vertex are
assumed in the quark self-energy loop. A model for the running coupling is
introduced, with infrared fixed point in agreement with previous
Dyson-Schwinger studies of the gauge sector, and with correct logarithmic tail.
Dynamical chiral symmetry breaking is investigated, and the generated quark
mass is of the order of the extension of the infrared plateau of the coupling,
and about three times larger than in the Abelian approximation, which violates
multiplicative renormalizability. The generated scale is of the right size for
hadronic phenomenology, without requiring an infrared enhancement of the
running coupling.


title: Tri-Bimaximal Mixing and the Neutrino Oscillation Data

abstract:
  Following recent results from the SNO solar neutrino experiment and the K2K
long-baseline neutrino experiment, the combined existing data on neutrino
oscillations now point strongly to a specific form for the lepton mixing
matrix, with effective bimaximal mixing of $\nu_{\mu}$ and $\nu_{\tau}$ at the
atmospheric scale and effective trimaximal mixing for $\nu_e$ with $\nu_{\mu}$
and $\nu_{\tau}$ at the solar scale (hence `tri-bimaximal' mixing). We give
simple mass-matrices leading to tri-bimaximal mixing, and discuss its relation
to the Fritzsch-Xing democratic ansatz.


title:
Proton Decay due to bulk SU(5) gauge bosons in the Randall-Sundrum
  Scenario

abstract:
  We calculate the proton decay rate due to five dimensional SU(5) gauge bosons
in the Randall-Sundrum scenario with two branes (Planck brane and TeV brane).
We consider matter in the usual 10 and \bar 5 SU(5) representations localized
on a brane, and consider the case when SU(5) is broken by a Higgs mechanism on
the matter brane. We calculate the proton decay rate mediated by X bosons, due
to terms in the Lagrangian with X and its derivative along the extra dimension.
We confirm that the experimental limit on the proton decay rate allows SU(5)
matter to be on the Planck brane, but excludes it from being on the TeV brane
in this scenario.


title: Neutralino relic density in minimal supergravity with co-annihilations

abstract:
  We evaluate the relic density of neutralinos in the minimal supergravity
(mSUGRA) model. All 2-->2 neutralino annihilation diagrams, as well as all
processes involving sleptons, charginos, neutralinos and third generation
squarks are included. Relativistic thermal averaging of the velocity times
cross sections is performed. We find that co-annihilation effects are only
important on the edges of the model parameter space, where some amount of
fine-tuning is necessary to obtain a reasonable relic density. Alternatively,
at high tan(beta), annihilation through very broad Higgs resonances gives rise
to an acceptable neutralino relic density over broad regions of parameter space
where little or no fine-tuning is needed. Finally, we compare our results
against the reach of various e+e- and hadron colliders for supersymmetric
matter.


title: Polarized Deep Inelastic Diffractive ep Scattering: Operator Approach

abstract:
  Polarized inclusive deep-inelastic diffractive scattering is dealt with in a
quantum field theoretic approach. The process can be described in the general
framework of non-forward scattering processes using the light-cone expansion in
the generalized Bjorken region applying the generalized optical theorem. The
diffractive structure functions $g_1^{D(3)}$ and $g_2^{D(3)}$ are calculated in
the twist-2 approximation and are expressed by diffractive parton
distributions, which are derived from pseudo-scalar two-variable operator
expectation values. In this approximation the structure functions $g_2^{D(3)}$
is obtained from $g_1^{D(3)}$ by a Wandzura-Wilczek relation similar as for
deep inelastic scattering. The evolution equations are given. We also comment
on the higher twist contributions in the light-cone expansion.


title: Fermion determinant with dynamical chiral symmetry breaking

abstract:
  One -loop fermion determinant is discussed for the case in which dynamical
chiral symmetry breaking caused by momentum dependent fermion self energy
$\Sigma(p^2)$ take place. The obtained series generalizes the heat kernel
expansion for hard fermion mass.


title: QCD Thermodynamics and Fireball Evolution in URHICs

abstract:
  The fireball created in an ultrarelativistic heavy ion collision is the
environment in which all processes providing clues about the possible formation
of the quark-gluon plasma (QGP) happen. It is therefore crucial to understand
the dynamics of this hot and dense system. We set up a model in which the
fireball evolution is reconstructed between two stages, the freeze-out, which
is accessible by hadronic observables, and the initial collision for which the
overlap geometry can be calculated. Using the equation of state (EoS) provided
by a quasiparticle model of the QGP, we are able to calculate thermodynamical
properties in volume slices of constant proper time and determine the volume
expansion self-consistently. The resulting evolution model can then be tested
against other observables, such as dilepton yields.


title: Cabibbo suppressed decays and the $\Xi_{c}^{+}$ lifetime

abstract:
  The problem of the $\Xi_{c}^{+}$ lifetime is considered in the framework of
{\em Heavy-Quark Expansion} and $SU(3)_{flavor}$ symmetry. The lifetime of
$\Xi_{c}^{+}$ is expressed in terms of measurable inclusive quantities of the
other two charmed baryons belonging to the same $SU(3)_{flavor}$ multiplet in a
model-independent way. In such a treatment, inclusive decay rates of singly
Cabibbo suppressed decay modes have a prominent role. An analogous approach is
applied to the multiplet of charmed mesons yielding interesting predictions on
$D_{s}^{+}$ properties. The results obtained indicate that a more precise
measurement of inclusive decay quantities of some charmed hadrons (such as
$\Lambda_{c}^{+}$) that are more amenable to experiment can contribute
significantly to our understanding of decay properties of other charmed hadrons
(such as $\Xi_{c}^{+}$) where discrepancies or ambiguities exist.


title: Detecting Microscopic Black Holes with Neutrino Telescopes

abstract:
  If spacetime has more than four dimensions, ultra-high energy cosmic rays may
create microscopic black holes. Black holes created by cosmic neutrinos in the
Earth will evaporate, and the resulting hadronic showers, muons, and taus may
be detected in neutrino telescopes below the Earth's surface. We simulate such
events in detail and consider black hole cross sections with and without an
exponential suppression factor. We find observable rates in both cases: for
conservative cosmogenic neutrino fluxes, several black hole events per year are
observable at the IceCube detector; for fluxes at the Waxman-Bahcall bound,
tens of events per year are possible. We also present zenith angle and energy
distributions for all three channels. The ability of neutrino telescopes to
differentiate hadrons, muons, and possibly taus, and to measure these
distributions provides a unique opportunity to identify black holes, to
experimentally constrain the form of black hole production cross sections, and
to study Hawking evaporation.


title: Impact of beam polarization at a future linear collider

abstract:
  Beam polarization at e^+e^- linear colliders will be a powerful tool for high
precision analyses. In this paper we summarize the polarization-related results
for Higgs and electroweak physics, QCD, Supersymmetry and alternative theories
beyond the Standard Model. Most studies were made for a planned linear collider
operating in the energy range sqrt{s}= 500-800 GeV. In particular we work out
the advantages of simultaneous polarization of the electron and positron beam.


title: Complete Reconstruction of the Neutralino System

abstract:
  Consecutively to the chargino system, $\tilde{chi}^pm$, in which the SU(2)
gaugino parameter $M_2$, the higgsino mass parameter $\mu$ and $\tan\beta$ can
be determined, the remaining fundamental supersymmetry parameter, the U(1)
gaugino mass $M_1$ can be analysed in the neutralino system, $\tilde{\chi}^0$,
including its modulus and phase in CP--noninvariant theories. First
experimental hints on CP violation can be seen in the threshold behaviour of
neutralino production.


title: SUSY Parameters from Charginos

abstract:
  The chargino pair production processes at $e^+e^-$ collisions are explored to
reconstruct the fundamental SUSY parameters: the SU(2) gaugino parameter $M_2$,
the higgsino mass parameter $\mu$ and $\tan\beta$. Both CP-conserving and
CP-violating SUSY sectors are discussed.


title:
Effective String Rope Model for the initial stages of Ultra-Relativistic
  Heavy Ion Collisions

abstract:
  Different approaches to describe initial stages of relativistic heavy ion
collisions are discussed qualitatively and quantitatively. An Effective String
Rope Model is presented for heavy ion collisions at RHIC energies. Our model
takes into account baryon recoil for both target and projectile, arising from
the acceleration of partons in an effective field, produced in the collision.
The typical field strength (string tension) for RHIC energies is about 5-12
GeV/fm, what allows us to talk about ``string ropes''. The results show that a
QGP forms a tilted disk, such that the direction of the largest pressure
gradient stays in the reaction plane, but deviates from both the beam and the
usual transverse flow directions. The produced initial state can be used as an
initial condition for further hydrodynamical calculations. Such initial
conditions lead to the creation of third flow component.


title: Large Solar Angle and Seesaw Mechanism: a Bottom-up Perspective

abstract:
  In addition to the well established large atmospheric angle, a large solar
angle is probably present in the leptonic sector. In the context of the see-saw
and by means of a bottom-up approach, we explore which patterns for the Dirac
and Majorana right-handed mass matrices provide two large mixings in a robust
way and with the minimal amount of tuning. Three favourite patterns emerge,
which have a suggestive physical interpretation in terms of the role played by
right-handed neutrinos: in both solar and atmospheric sectors, either a single
or a pseudo-Dirac pair of right-handed neutrinos dominates. Each pattern gives
rise to specific relations among the neutrino mixing angles and mass
differences, which lead to testable constraints on U_{e3}. The connection with
the rate of LFV charged lepton decays is also addressed.


title:
Higgs Sectors in which the only light Higgs boson is CP-odd and Linear
  Collider Strategies for its Discovery

abstract:
  We survey techniques for finding a CP-odd Higgs boson, A, at the Linear
Collider that do not depend upon the presence of other light Higgs bosons. The
potential reach in $[m_A,\tan\beta]$ parameter space for various
production/discovery modes is evaluated and regions where discovery might not
be possible at a given $\sqrt{s}$ are delineated. We give, for the first time,
results for $\epem\to \nu\anti\nu A$ one-loop $W$ boson fusion production.


title: Hard Scattering Factorization from Effective Field Theory

abstract:
  In this paper we show how gauge symmetries in an effective theory can be used
to simplify proofs of factorization formulae in highly energetic hadronic
processes. We use the soft-collinear effective theory, generalized to deal with
back-to-back jets of collinear particles. Our proofs do not depend on the
choice of a particular gauge, and the formalism is applicable to both exclusive
and inclusive factorization. As examples we treat the pi-gamma form factor
(gamma gamma* -> pi^0), light meson form factors (gamma* M -> M), as well as
deep inelastic scattering (e- p -> e- X), Drell-Yan (p pbar -> X l+ l-), and
deeply virtual Compton scattering (gamma* p -> gamma(*) p).


title: Phenomenology of Electroweak Symmetry Breaking from Theory Space

abstract:
  Recently, a new class of realistic models for electroweak symmetry breaking
have been constructed, without supersymmetry. These theories have naturally
light Higgs bosons and perturbative new physics at the TeV scale. We describe
these models in detail, and show that electroweak symmetry breaking can be
triggered by a large top quark Yukawa coupling. A rich spectrum of particles is
predicted, with a pair of light Higgs doublets accompanied by new light weak
triplet and singlet scalars. The lightest of these new scalars is charged under
a geometric discrete symmetry and is therefore stable, providing a new
candidate for WIMP dark matter. At TeV energies, a plethora of new heavy
scalars, gauge bosons and fermions are revealed, with distinctive quantum
numbers and decay modes.


title:
Weak Mixing Angle and the SU(3)_C times SU(3) Model on M^4 times
  S^1/(Z_2 times Z_2')

abstract:
  We show that the desirable weak mixing angle sin^2 theta_W = 0.2312 at m_Z
scale can be generated naturally in the SU(3)_C times SU(3) model on M^4 times
S^1 / (Z_2 times Z_2') where the gauge symmetry SU(3) is broken down to SU(2)_L
times U(1)_Y by orbifold projection. For a supersymmetric model with a TeV
scale extra dimension, the SU(3) unification scale is about hundreds of TeVs at
which the gauge couplings for SU(3)_C and SU(3) can also be equal in the mean
time. For the non-supersymmetric model, SU(2)_L times U(1)_Y are unified at
order of 10 TeV. These models may serve as good candidates for physics beyond
the SM or MSSM.


title: The $\omega\sigma\gamma$-vertex in light cone QCD sum rules

abstract:
  We investigate the $\omega\sigma\gamma$-vertex and estimate the coupling
constant g$_{\omega\sigma\gamma}$ in the framework of the light cone QCD sum
rules. We compare our result with the values of this coupling constant deduced
from a phenomenological analysis of $\omega\to\pi\pi\gamma$ decays.


title: Heavy Quark Theory

abstract:
  These lectures describe the most important theoretical methods in b-physics.
We discuss the formalism of effective weak Hamiltonians, heavy quark effective
theory, the heavy quark expansion for inclusive decays of b-hadrons and,
finally, the more recent ideas of QCD factorization for exclusive nonleptonic B
decays. While the main emphasis is put on introducing the basic theoretical
concepts, some key applications in phenomenology are also presented for
illustration.


title: A Case Study in Dimensional Deconstruction

abstract:
  We test Arkani-Hamed et al.'s dimensional deconstruction on a model that is
predicted to have a naturally light composite Higgs boson, i.e., one whose mass
M is much less than its binding scale \Lambda, and whose quartic coupling
\lambda is large, so that its vacuum expectation value v \sim M/\sqrt{\lambda}
<< \Lambda also. We consider two different underlying dynamics--UV
completions--at the scale \Lambda for this model. We find that the expectation
from dimensional deconstruction is not realized and that low energy details
depend crucially on the UV completion. In one case, M << \Lambda and \lambda <<
1, hence, v \sim \Lambda. In the other, \lambda can be large or small, but then
so is M, and v is still O(\Lambda).


title: CPT and Lorentz Violation in Neutral-Meson Oscillations

abstract:
  In this talk, the status of CPT tests with neutral mesons is reviewed in the
context of quantum field theory and the Lorentz- and CPT-violating
standard-model extension.


title: A new solution to the solar neutrino deficit

abstract:
  We reexamine the transition magnetic moment solution to the solar neutrino
problem. We argue that the absence of large time variations in the
Super-Kamiokande rate provides strong evidence against spin-flavor flip in the
solar convective zone. Spin-flavor flip could, however, occur in the primordial
magnetic field in the radiative zone. We compute the longest lived toroidal
mode for this field and show that spin-flavor flip in the radiative zone can
account for all available solar data.


title:
Neutrino radiative decay and lepton flavor violation in supersymme tric
  models

abstract:
  The radiative decay of neutrino,such as (\bar{\nu_{\tau}}: \longrightarrow:
\nu_{\mu}+\gamma), in the minimal supersymmetric standard model with
right-handed neutrinos (MSSMRN) and in the (SU(5)) grand unified theory with
right-handed neutrinos((SU(5)RN))model is examined.In these models,the
transition magnetic moment of neutrino is directly proportional to the neutrino
mass.For different values on SUSY parameters (compatible with the relic
density) and for large mixing angle solution to the atmospheric neutrino
problem,the transition magnetic moment can be a few times greater than,or
comparable to,the value of the standard model (with a right-handed neutrino
singlet added).


title: Can radiative correction cause large neutrino mixing?

abstract:
  We investigate whether radiative corrections can be responsible for the
generation of large mixing in a pair of degenerate neutrino with same CP
parity. We find that this mechanism is fine tuned and doesn't work for
arbitrary mixing at the high scale.


title: Color-Flavor (Un)locking

abstract:
  The structure of the phase diagram of strongly interacting matter at moderate
densities is calculated within a 3-flavor NJL-type quark model with realistic
quark masses. We focus on the influence of the selfconsistently determined
effective strange quark mass on the color-flavor unlocking phase transition.


title: On Reconciling Gottfried Sum Rule Violation with Cabibbo Theory

abstract:
  We discuss the seemingly contradictory constraints of simultaneously
preserving the SU(3)-symmetric Cabibbo description of the weak vector baryon
matrix elements, accounting for SU(3) flavor symmetry breaking and describing
the observed violation of the Gottfried Sum Rule. We try to construct a simple
model that will satisfy these constraints and use it to explain the generic
difficulties and tradeoffs.


title: Supersymmetric Pati-Salam Models from Intersecting D-Branes

abstract:
  We explore supersymmetric Type I string-motivated three-family scenarios in
which the Standard Model is embedded within two sets of intersecting D branes
with U(1)-extended Pati-Salam gauge groups. We study a model inspired by the
Shiu-Tye Type IIB orientifold, in which a three-family scenario is obtained by
assuming that the gauge symmetry breaking takes place in two stages; the
Pati-Salam group arises from diagonal breaking of the U(N) gauge groups, which
is then broken to the SM gauge group. We investigate the diagonal breaking
scenario in detail and find that generically there are difficulties involved in
decoupling the exotic Higgs remnants. On the phenomenological side, proper low
energy gauge coupling predictions effectively lead to a ``single brane''
scenario for M_string of order 10^16 GeV. The soft parameters in this limit are
constrained by a well-known sum rule, leading to a distinctive phenomenological
pattern for the low energy mass spectrum.


title:
Fayet-Iliopoulos D-terms, neutrino masses and anomaly mediated
  supersymmetry breaking

abstract:
  We explore, in the context of the MSSM generalised to admit massive
neutrinos, an extension of the Anomaly Mediated Supersymmetry Breaking solution
for the soft scalar masses to incorporate Fayet-Iliopoulos D-terms. The slepton
mass problem characteristic of the scenario is resolved, and the fermion mass
hierarchy is explained via the Froggatt-Nielsen mechanism. FCNC problems are
evaded by a combination of universal doublet charges and Yukawa textures which
are diagonalised by transforming the left-handed fields only.


title: Muon Decay Spectrum: Leading Logarithmic Approximation

abstract:
  O(alpha^2 ln^2(m_mu/m_e)) QED corrections to the electron spectrum and
angular distribution in muon decay are evaluated. Impact on the determination
of Michel parameters is estimated. Current theoretical uncertainty in the muon
decay distributions is discussed.


title:
T violation in $\Lambda_b\to \Lambda\ell^+\ell^-$ decays with polarized
  $\Lambda$

abstract:
  We study the T violating effects in the baryonic decays of
$\Lambda_b\to\Lambda l^+l^- (l=e ,\mu)$ with polarized $\Lambda$. We show that
the transverse $\Lambda$ polarizations in these baryonic decays could be as
large as 50% in CP violating theories beyond the standard model such as the
SUSY models, which can be tested in various future hadron colliders.


title: On the amelioration of quadratic divergences

abstract:
  Once massless quadratically divergent tadpole diagrams are discarded, because
they contain no intrinsic scale, it is possible to convert other divergences
into logarithmic form, using partial fraction identities; this includes the
case of quadratic divergences, as has been applied to the linear sigma model.
However the procedure must be carried out with due care, paying great attention
to correct numerator factors.


title: Jet Tomography of Hot and Cold Nuclear Matter

abstract:
  Medium modification of parton fragmentation functions induced by multiple
scattering and gluon bremsstrahlung is shown to describe the recent HERMES data
in deeply inelastic scattering (DIS) very well, providing the first evidence of
$A^{2/3}$-dependence of the modification. The energy loss is found to be
$<dE/dL> \approx 0.5$ GeV/fm for a 10-GeV quark in a $Au$ nucleus. Including
the effect of expansion, analysis of the $\pi^0$ spectra in central $Au+Au$
collisions at $\sqrt{s}=130$ GeV yields an averaged energy loss equivalent to
$<dE/dL> \approx 7.3$ GeV/fm in a static medium. Predictions for central
$Au+Au$ collisions at $\sqrt{s}=200$ GeV are also given.


title: The B^+ B_d^0 Lifetime Difference Beyond Leading Logarithms

abstract:
  We compute perturbative QCD corrections to the lifetime splitting between the
charged and neutral $B$ meson in the framework of the heavy quark expansion.
These next-to-leading logarithmic corrections are necessary for a meaningful
use of hadronic matrix elements of local operators from lattice gauge theory.
We find the uncertainties associated with the choices of renormalization scale
and scheme significantly reduced compared to the leading-order result. We
include the full dependence on the charm-quark mass $m_c$ without any
approximations. Using hadronic matrix elements estimated in the literature with
lattice QCD we obtain $\tau(B^+)/\tau(B^0_d)=1.053\pm 0.027\pm 0.017$, where
the effects of unquenching and $1/m_b$ corrections are not yet included. The
lifetime difference of heavy baryons $\Xi^0_b$ and $\Xi^-_b$ is also briefly
discussed.