title:
New Evaluation of the QED Running Coupling and of the Muonium Hyperfine
  Splitting

abstract:
  We present a new independent evaluation of the hadronic and QCD contributions
to the QED running coupling \alpha(M_Z) and to the muonium hyperfine splitting
\nu. We obtain: \Delta\alpha_{had}=2770(17)10^{-5} and
\Delta\nu_{had}=232.5(2.5) Hz. Combined with the QED and Electroweak Standard
Model contributions, they lead to: \alpha^{-1}(M_Z)=128.926(25) and to the
Fermi energy splitting \nu_F=4~459~031~783(229) Hz, where for the latter, we
have used, in addition, the precise measurement of the muonium hyperfine
splitting \nu_{exp}. We use \nu_F in order to predict the ratios of masses
m_{\mu}/m_e=206.768~276(11) and of the magnetic moments
\mu_{\mu}/\mu^e_B=4.841~970~47(25)10^{-3}, which are in excellent agreement
with the ones quoted by the Particle Data Group. These remarkable agreements
can provide strong constraints on some contributions beyond the Standard Model.


title: Extended Minimal Flavour Violating MSSM

abstract:
  The recently reported measurements of the CP asymmetry a(psi K) by the BABAR
and BELLE collaborations are in good agreement with the standard model
prediction. With the anticipated precision in a(psi K) at the B factories and
hadron colliders, one hopes to pin down any possible deviation from the SM. We
discuss an extension of the MFV-supersymmetric models which comfortably
accommodates the current measurements of the CP asymmetry a(psi K), but differs
from the SM due to an additional flavour changing structure beyond the CKM
matrix. We analyze the compatibility of this model with present data and
suggest specific tests in forthcoming experiments in B physics. In addition to
the CP-asymmetries in B-meson decays and the Bs-bar(Bs) mass difference, we
emphasize measurements of the radiative transition b -> d gamma as sensitive
probes of the postulated flavour changing structure. Interestingly, the
CKM-unitarity analysis in these models also allows solutions with gamma > pi/2,
where gamma=-arg(Vub). Such large values of gamma are hinted by the current
measurements of the branchig ratios for the decays B -> pi pi and B -> K pi.


title: Observables and initial conditions for self-similar ellipsoidal flows

abstract:
  Single-particle spectra and two-particle Bose-Einstein correlation functions
are determined analytically utilizing a self-similar solution of
non-relativistic hydrodynamics for ellipsoidally-symmetric, expanding
fireballs, by assuming that the symmetry axes of the ellipsoids are tilted in
the frame of the observation. The directed, elliptic and third flows are
calculated analytically. The mass dependences of the slope parameters in the
principal directions of the expansion, together with the mass and angular
dependences of the HBT radius parameters, reflect directly the ellipsoidal
properties of the flow.


title:
Prediction of Three-body $B^0\to \rho^-p\bar{n}, \pi^-p\bar{n}$ Decay
  Rates

abstract:
  We predict the rates of the charmless three-body $B^0\to \rho^-p\bar{n}$ and
$\pi^-p\bar{n}$ modes due to weak vector current contributions to be $\sim
4\times 10^{-6}$ and $2\times 10^{-6}$, respectively. The basis is a
factorization approach of current produced nucleon pairs, together with an
isospin transformation that relates nucleon weak vector form factors to
electromagnetic form factors. Adding the axial vector current contribution, we
find $B^0\to \rho^-p\bar{n}$ and $B^+\to \rho^0p\bar{n}$ to be at $10^{-5}$
order. The three-body modes appear to dominate over the two-body modes such as
$B\to p\bar{p}$, $p\bar \Lambda$.


title:
Multijet matrix elements and shower evolution in hadronic collisions: W
  b bbar + n jets as a case study

abstract:
  We study in this paper the production, in hadronic collisions, of final
states with W gauge bosons, heavy quark pairs and n extra jets (with n up to
4). The complete partonic tree-level QCD matrix elements are evaluated using
the ALPHA algorithm, and the events generated at the parton level are then
evolved through the QCD shower and eventually hadronised using the coherent
shower evolution provided by the HERWIG Monte Carlo. We discuss the details of
our Monte Carlo implementation, and present results of phenomenological
interest for the Tevatron Collider and for the LHC. We also comment on the
impact of our calculation on the backgrounds to W (H -> b bbar) production,
when only one b jet is tagged.


title:
GUT Model Predictions for Neutrino Oscillation Parameters Compatible
  with the Large Mixing Angle Solar Solution

abstract:
  Within the framework of an SO(10) GUT model that can accommodate both the
atmospheric and the LMA solar neutrino mixing solutions, we present explicit
predictions for the neutrino oscillation parameters \sin^2 2\theta_{13}, \sin^2
2\theta_{12}, \sin^2 2\theta_{23}, and \Delta m^2_{21}. Precise measurements of
\sin^2 2\theta_{12} and \Delta m^2_{21} by KamLAND can be used to precisely
determine the GUT model parameters. We find that the model can then be tested
at Neutrino Superbeams and Neutrino Factories with precision neutrino
oscillation measurements of \sin^2 2\theta_{23}, \sin^2 2\theta_{13}, and the
leptonic CP phase \delta_{CP}.


title: SO(10) Unified Theories in Six Dimensions

abstract:
  We construct supersymmetric models of SO(10) unification in which the gauge
symmetry is broken by orbifold compactification. We find that using boundary
conditions to break the gauge symmetry down to $SU(3)_C \otimes SU(2)_L \otimes
U(1)_Y \otimes U(1)_X$ without leaving unwanted massless states requires at
least two extra dimensions, motivating us to work with 6D orbifolds. SO(10) is
broken by two operations, each of which induces gauge-breaking to either the
Georgi-Glashow, Pati-Salam, or flipped $SU(5) \otimes U(1)$ subgroups;
assigning different unbroken subgroups to the two operations leaves only the
standard model gauge group and $U(1)_X$ unbroken. The models we build employ
extra-dimensional mechanisms for naturally realizing doublet-triplet splitting,
suppressing proton decay, and avoiding unwanted grand-unified fermion mass
relations. We find some tension between being free of anomalies of the 6D bulk,
accommodating a simple mechanism for generating right-handed neutrino masses,
and preserving the precise prediction of the weak mixing angle.


title: More about Kaluza-Klein Regularization

abstract:
  We study the so-called ``Kaluza-Klein regularization''. We calculate one-loop
corrections to the Higgs mass due to Kaluza-Klein modes explicitly in a model
with SUSY breaking mass splitting between bosonic and fermionic modes. We
perform the proper time cutoff at $1/\Lambda^2$ and the KK level truncation at
$\ell$. It is shown that the finite result is obtained as long as $\ell \gg
R\Lambda$ for the compactification radius $R$.


title: Update on Solar and Atmospheric Four-Neutrino Oscillations

abstract:
  In this talk we present the update (including the recent SNO results) of our
analysis of the neutrino oscillation solutions of the solar and atmospheric
neutrino problems in the framework of four-neutrino mixing where a sterile
neutrino is added to the three standard ones and the mass spectra present two
separated doublets. Such scenarios allow for simultaneous transitions of solar
$\nu_e$, as well as atmospheric $\nu_\mu$, into a combination of active and
sterile neutrinos. We evaluate the allowed active-sterile admixture in both
solar and atmospheric oscillations from the combined analysis. Our results show
that, although the Super-Kamiokande data disfavour both the pure
$\nu_\mu\to\nu_s$ atmospheric channel and, in combination with SNO, the pure
$\nu_e\to\nu_s$ solar channel, the result from the combined analysis still
favours close-to-pure active and sterile oscillations and disfavours
oscillations into a near-maximal active-sterile admixture.


title: Probing for New Physics in Polarized $\Lambda_b$ decays at the Z

abstract:
  Polarized $\Lambda_b \to \Lambda \gamma$ decays at the Z pole are shown to be
well suited for probing a large variety of New Physics effects. A new
observable is proposed, the angular asymmetry between the $\Lambda_b$ spin and
photon momentum, which is sensitive to the relative strengths of the opposite
chirality and Standard Model chirality $b \to s \gamma$ dipole operators.
Combination with the $\Lambda $ decay polarization asymmetry and comparison
with the $\Lambda_b$ polarization extracted from semileptonic decays allows
important tests of the $V-A$ structure of the Standard Model. Modifications of
the rates and angular asymmetries which arise at next-to-leading order are
discussed. Measurements for $\Lambda_b \to \Lambda \gamma$ and the CP conjugate
mode, with branching ratios of a few times $10^{-5}$, are shown to be sensitive
to non-standard sources of CP violation in the $\Lambda_b \to \Lambda \gamma$
matrix element. Form factor relations for heavy-to-light baryon decays are
derived in the large energy limit, which are of general interest.


title:
Unifying aspects of polarization of vector mesons from hard production
  in DIS and at Tevatron

abstract:
  Virtual photons have both the transverse and longitudinal polarization. In
the inclusive DIS the impact of longitudinal photons, quantified by
R=sigmaL/\igmaT sim 0.2, is marginal, but in diffractive DIS with excitation of
small mass hadronic states or exclusive diffraction into vector mesons, QCD
predicts R >> 1 in agreement with the experiment. After a brief review of the
modern status of QCD theory of diffractive vector meson production I argue that
longitudinally polarized gluons give rise to a large longitudinal polarization
of the prompt JPsi and Psiprim observed at the Tevatron.


title:
CP violating asymmetries in single top quark production at the Tevatron
  p pbar collider

abstract:
  Analytic expressions for the angular distributions of the $b$-quarks
associated with single $t$-quark production in $p \bar p \to W^* \to t \bar b
\to b \bar b W$ and of the leptons from the subsequent decay $W \to l\nu$ are
obtained in the laboratory system. CP violation in the $t$-production vertex is
assumed. Different angular and total cross section CP violating asymmetries are
considered. Relations testing CP violation solely in the $t$-decay vertex are
also obtained. A numerical analysis is performed in the MSSM with a CP
violating phase of the trilinear coupling $A_{\tilde t}$. The asymmetries are
typically of the order $10^{-3}$ - $10^{-4}$.


title: Future Measurements of Deeply Virtual Compton Scattering at HERMES

abstract:
  Prospects for future measurements of Deeply Virtual Compton Scattering at
HERMES are studied using different simple models for parameterizations of
generalized parton distributions (GPDs). Measurements of the lepton charge and
lepton beam helicity asymmetry will yield important input for theoretical
models towards the future extraction of GPDs.


title: Summary Report of the Spin Physics Working Group

abstract:
  The contributions to the Spin Physics WG are summarized. Several new
experimental results and plans for new measurements have been reported. An
improved theoretical understanding of the most recent hot topics in spin
physics has been discussed by many authors especially in the new fields of the
transversity and generalized parton distributions.


title: Radiative Lepton Decays and the Substructure of Leptons

abstract:
  The leptons are viewed as composite objects, exhibiting anomalous magnetic
moments and anomalous flavor-changing transition moments. The decay \mu \to e
\gamma is expected to occur with a branching ratio of the same order as the
present experimental limit. The first order QED radiative correction is
considered.


title: Extended Electroweak Interactions and the Muon g-2

abstract:
  We look at a number of simple, but representative, models of extended
electroweak gauge structures, and present the general contributions to a_muon
from the heavy Z' and W' electroweak gauge bosons. Of the models we have
examined, none can explain the observed discrepancy between the current
experimental value of a_muon and the Standard Model prediction if we require
that the gauge fields explain the discrepancy by themselves. In the context of
models with new matter fields as well as the additional gauge fields discussed
here, however, the gauge field contributions to a_muon can be a substantial and
important part of the discrepancy.


title:
A Note on One Loop Electroweak Contributions to g-2: a Companion to
  BUHEP-01-16

abstract:
  In this note we present general expressions at one loop order that can be
used to calculate the contributions to the anomalous magnetic moment of
fundamental, charged Dirac fermions. In particular, we provide the expressions
for charged and neutral scalar and charged and neutral gauge boson
contributions with general vector and axial couplings to the fermion of
interest. The calculations presented in this note were originally derived for
use in the author's letter, hep-ph/0108080. We have chosen to document and make
available the results and derivations in the hope that they will also be useful
to others. Our expressions reproduce the Standard Model electroweak
contributions to a_muon in the appropriate mass limits, and are flexible enough
to allow us to handle many scenarios of new physics beyond the Standard Model.


title: Muon g-2 and Electric Dipole Moments in SUGRA Models

abstract:
  The SUSY contribution to the muon magnetic moment anomaly, a_mu^SUGRA, and
the electron electric dipole moment, d_e, is discussed within the framework of
a modified mSUGRA model where the magnitudes of the soft breaking masses are
universal, but arbitrary phases are allowed. It is shown analytically how the
cancellation mechanism can allow for large phases (i.e. theta_B <~ 0.4) and
still suppress the value of d_e below its current experimental bound. The
dependence of a_mu^SUGRA on the CP violating phases are analytically examined,
and seen to decrease it but by at most a factor of about two. This reduction
would then decrease the upper bound on m_1/2 due to the lower bound of
Brookhaven data, and hence lower the SUSY mass spectrum, making it more
accessible to accelerators. At the electroweak scale, the phases have to be
specified to within a few percent to satisfy the experimental bound on d_e, but
at the GUT scale, fine tuning below 1% is required for lower values of m_1/2.
This fine tuning problem will become more serious if the bound on d_e is
decreased.


title:
The multiple solutions of self-consistency condition in Walecka model
  and the validity of the Brown-Rho scaling law

abstract:
  We investigate the self-consistency condition (SCC) of mean-field theory in
Walecka model and find that the solutions of the SCC are multiple at high
temperature and chemical potential. Using the effective Lagrangian approach, we
study medium effects on the $\omega$ meson mass by taking into account of
vacuum effects. We show that the $\omega$ meson mass decreases with both
temperature and chemical potential with a general tendency, while near the
critical point several $\omega$ meson masses become degenerate due to the
multiple solutions of the SCC. We check the validity of Brown-Rho scaling law
in this case. Finally, we calculate the thermodynamic potential and prove that
the multiple solutions of the SCC result from a first-order phase transition of
nuclear matter in the Walecka model at high temperature and chemical potential.


title: Quarkonium spectroscopy and perturbative QCD: massive quark-loop effects

abstract:
  We study the spectra of the bottomonium and B_c states within perturbative
QCD up to order alpha_s^4. The O(Lambda_QCD) renormalon cancellation between
the static potential and the pole mass is performed in the epsilon-expansion
scheme. We extend our previous analysis by including the (dominant) effects of
non-zero charm-quark mass in loops up to the next-to-leading non-vanishing
order epsilon^3. We fix the b-quark MSbar mass $\bar{m}_b \equiv m_b^{\bar{\rm
MS}}(m_b^{\bar{\rm MS}})$ on Upsilon(1S) and compute the higher levels. The
effect of the charm mass decreases $\bar{m}_b$ by about 11 MeV and increases
the n=2 and n=3 levels by about 70--100 MeV and 240--280 MeV, respectively. We
provide an extensive quantitative analysis. The size of non-perturbative and
higher order contributions is discussed by comparing the obtained predictions
with the experimental data. An agreement of the perturbative predictions and
the experimental data depends crucially on the precise value (inside the
present error) of alpha_s(M_Z). We obtain $m_b^{\bar{\rm MS}}(m_b^{\bar{\rm
MS}}) = 4190 \pm 20 \pm 25 \pm 3 ~ {\rm MeV}$.


title: Exploring Neutrino Mixing with Low Energy Superbeams

abstract:
  We explore as clearly as possible the features of neutrino oscillation which
are relevant for measurements of the CP violating Kobayashi-Maskawa phase delta
and the sign of \Delta m^2_{13}. We focus on the so called low-energy option
and discuss principles for optimizing experimental parameters to measure these
two quantities simultaneously. Toward the goal, we first formulate a method for
obtaining a bird-eye view of the phenomenon of neutrino oscillation by
introducing a new powerful tool called the ``CP trajectory diagram in
bi-probability space''. It allows us to represent pictorially the three effects
separately in a single diagram; effect from genuine CP violation due to the sin
delta term, effect from the CP conserving cos delta term, and the fake CP
violating effect due to earth matter. By using the CP trajectory diagram we
observe that there is a two-fold ambiguity in the determination of delta which
is related with the sign of Delta m^2_{13}. We then address the question of
what are the promising options for conceptual design of experiments at low
energies which looks for CP violation and at the same time would resolve the
two-fold ambiguity. We point out that a version with distance of about 700 km,
with a megaton class water Cherenkov detector gives an optimal design which
allows simultaneous determination of delta and the sign of Delta m^2_{13} {\it
in situ}. We also point out that there is a possibility that the similar {\it
in situ} measurement of both quantities can be done at the Phase II of JHF
experiment with much shorter baseline, under the assumption of nature's kind
setting of delta to the region of sin{delta} \cdot Delta m^2_{13} < 0. A
technique of running at high (sim 1 GeV) and low (sim 0.5 GeV) beam energies is
proposed as a method for better identification of delta.


title: Topological String Defect Formation During the Chiral Phase Transition

abstract:
  We extend and generalize the seminal work of Brandenberger, Huang and Zhang
on the formation of strings during chiral phase transitions(berger) and discuss
the formation of abelian and non-abelian topological strings during such
transitions in the early Universe and in the high energy heavy-ion collisions.
Chiral symmetry as well as deconfinement are restored in the core of these
defects. Formation of a dense network of string defects is likely to play an
important role in the dynamics following the chiral phase transition. We
speculate that such a network can give rise to non-azimuthal distribution of
transverse energy in heavy-ion collisions.


title: Spontaneous parity breaking and fermion masses

abstract:
  We present a SU(2)_L * SU(2)_R * U(1) left-right symmetric model for
elementary particles and their connection with the fermion mass spectrum. New
mirror fermions and a minimal set of Higgs particles are proposed. The model
can accommodate a consistent pattern for charged and neutral fermion masses as
well as neutrino oscillations. The connection between the left and right
sectors can be done by the neutral vector gauge boson Z and a new heavy Z'.


title:
Convolution formula and finite W boson width effects in the top quark
  width

abstract:
  In the standard model, the top quark decay width \Gamma_t is computed from
the exclusive t -> bW decay. We argue in favor of using the three body decays
t-> bf_i\bar{f}_j to compute \Gamma_t as a sum over these exclusive modes. As
dictated by the S-matrix theory, these three body decays of the top quark
involve only asymptotic states and incorporate the width of the W boson
resonance in a natural way. The convolution formula (CF) commonly used to
include the finite width effects is found to be valid, in the general case,
when the intermediate resonance couples to a conserved current (limit of
massless fermions in the case of W bosons). The relation Gamma_t=\Gamma(t-> bW)
is recovered by taking the limit of massless fermions followed by the W boson
narrow width approximation. Although both calculations of \Gamma_t are
different at the formal level, their results would differ only by tiny effects
induced by light fermion masses and higher order radiative corrections.


title:
Observable Neutron-Antineutron Oscillations in Seesaw Models of Neutrino
  Mass

abstract:
  We show that in a large class of supersymmetric models with spontaneously
broken B-L symmetry, neutron--antineutron oscillations occur at an observable
level even though the scale of B-L breaking is very high, v_{B-L} ~ 2 x 10^{16}
GeV, as suggested by gauge coupling unification and neutrino masses. We
illustrate this phenomenon in the context of a recently proposed class of
seesaw models that solves the strong CP problem and the SUSY phase problem
using parity symmetry. We obtain an upper limit on N-\bar{N} oscillation time
in these models, \tau_{N-\bar{N}} < 10^{9} -10^{10} sec. This suggests that a
modest improvement in the current limit on \tau_{N-\bar{N}} of 0.86 x 10^8 sec
will either lead to the discovery of N-\bar{N} oscillations, or will
considerably restrict the allowed parameter space of an interesting class of
neutrino mass models.


title: Neutrino Superbeam Scenarios at the Peak

abstract:
  We discuss options for U.S. long baseline neutrino experiments using upgraded
conventional neutrino beams, assuming $L/E_\nu$ is chosen to be near the peak
of the leading oscillation. We find that for L = 1290 km (FNAL-Homestake) or
1770 km (FNAL-Carlsbad, or BNL-Soudan) it is possible to simultaneously have
good $\sin^22\theta_{13}$ reach and sgn($\delta m^2_{31}$) determination, and
possibly sizeable $\tau$ rates and some $\delta$ sensitivity.


title: Recoil correction to the magnetic moment of a bound electron

abstract:
  The effect of a finite nuclear mass on the magnetic moment of the electron
bound in the ground state of a hydrogen-like ion is analyzed. Using the exact
in Z\alpha expression for the recoil shift of the energy, I calculate the order
(Z\alpha)^4 m/M correction to the electron gyromagnetic ratio. The theoretical
uncertainty in the prediction for the experimentally interesting carbon ion is
decreased to the level of 1.2x10^-9. This provides a factor of two improvement
in the precision of the atomic mass of the electron.


title: Coherent gluon production in very high energy heavy ion collisions

abstract:
  The early stages of a relativistic heavy-ion collision are examined in the
framework of an effective classical SU(3) Yang-Mills theory in the transverse
plane. We compute the initial energy and number distributions, per unit
rapidity, at mid-rapidity, of gluons produced in high energy heavy ion
collisions. We discuss the phenomenological implications of our results in
light of the recent RHIC data.


title:
Effects of shadowing on Drell-Yan dilepton production in high energy
  nuclear collisions

abstract:
  We compute cross sections for the Drell-Yan process in nuclear collisions at
next-to-leading order (NLO) in \alpha_s. The effects of shadowing on the
normalization and on the mass and rapidity dependence of these cross sections
are presented. An estimate of higher order corrections is obtained from
next-to-next-to-leading order (NNLO) calculation of the rapidity-integrated
mass distribution. Variations in these predictions resulting from choices of
parton distribution sets are discussed. Numerical results for mass
distributions at NLO are presented for RHIC and LHC energies, using appropriate
rapidity intervals. The shadowing factors in the dilepton mass range 2 < M < 10
GeV are predicted to be substantial, typically 0.5 - 0.7 at LHC, 0.7 - 0.9 at
RHIC, and approximately independent of the choice of parton distribution sets
and the order of calculation.


title:
Anomalies and Fermion Content of Grand Unified Theories in Extra
  Dimensions

abstract:
  The restrictions imposed by anomaly cancellation on the chiral fermion
content of nonsupersymmetric gauge theories based on various groups are studied
in spacetime dimension D=6, 8, and 10. In particular, we show that the only
mathematically consistent chiral SU(5) theory in D=6 contains three
nonidentical generations.


title:
On the structure of the virtual Compton amplitude with additional
  final-state meson in the extended Bjorken region

abstract:
  Using the framework of the non-local light-cone expansion a systematic study
is performed for the structure of the twist-2 contributions to the virtual
Compton amplitude in polarized deep-inelastic non-forward scattering for
general nucleon spin with an additional scalar meson in the final state. A
useful kinematic parameterization allowing for appropriate triple-valued
off-forward parton distribution amplitudes is given. One-variable amplitudes
being adapted to the fixed parameters of the extended Bjorken region are
introduced by decomposing the Compton amplitude into collinear and
non-collinear components. These amplitudes obey Wandzura-Wilczek and
Callan-Gross like relations. The evolution equations for all the distribution
amplitudes are determined showing that the additional meson momentum does not
appear in the evolution kernels. The generalization to $n$ outgoing mesons is
given.


title: Implications of Recent $\bar{B}^0\to D^{(*)0}X^0$ Measurements

abstract:
  The recent measurements of the color-suppressed modes $\bar B^0\to
D^{(*)0}\pi^0$ imply non-vanishing relative final-state interaction (FSI)
phases among various $\bar B\to D\pi$ decay amplitudes. Depending on whether or
not FSIs are implemented in the topological quark-diagram amplitudes, two
solutions for the parameters $a_1$ and $a_2$ are extracted from data using
various form-factor models. It is found that $a_2$ is not universal:
$|a_2(D\pi)|= 0.40-0.55$ and $|a_2(D^*\pi)|= 0.25-0.35$ with a relative phase
of order $(50-55)^\circ$ between $a_1$ and $a_2$. If FSIs are not included in
quark-diagram amplitudes from the outset, $a_2^{eff}/a_1^{eff}$ and $a_2^{eff}$
will become smaller. The large value of $|a_2(D\pi)|$ compared to
$|a_2^{eff}(D\pi)|$ or naive expectation implies the importance of
long-distance FSI contributions to color-suppressed internal $W$-emission via
final-state rescatterings of the color-allowed tree amplitude.


title: Detecting Exotic Heavy Leptons at the Large Hadron Collider

abstract:
  New almost-degenerate charged and neutral heavy leptons are a feature of a
number of theories of physics beyond the Standard Model. The prospects for
detecting these at the Large Hadron Collider using a time-of-flight technique
are considered, along with any cosmological or experimental constraints on
their masses. Based on a discovery criterion of 10 detected exotic leptons we
conclude that, with an integrated luminosity of 100 fb-1, it should be possible
to detect such leptons provided their masses are less than 950 GeV. It should
also be possible to use the angular distribution of the produced particles to
distinguish these exotic leptons from supersymmetric scalar leptons, at a
better than 90% confidence level, for masses up to 580 GeV.


title: The high energy cosmic ray spectrum from relic particle decay

abstract:
  It has been speculated that the recently detected ultra-high energy cosmic
rays may originate from the decays of relic particles with mass of order
$10^{12}$ GeV clustered in the halo of our Galaxy. This hypothesis can be
tested through forthcoming measurements of the spectra of both high energy
cosmic nucleons and neutrinos, which are determined in this model by the
physics of QCD fragmentation, with no astrophysical uncertainties. We evolve
fragmentation spectra measured at LEP energies up to the scale of the decaying
particle mass by numerical solution of the DGLAP equations. This enables
incorporation of the effects of supersymmetry on the development of the cascade
and we also allow for decays into many-particle states. The calculated spectral
shape agrees well with present cosmic ray data beyond the
Greisen-Zatsepin-Kuzmin energy.


title: Multiple parton radiation in hadroproduction at lepton-hadron colliders

abstract:
  I discuss the impact of the the coherent parton radiation on semi-inclusive
production of hadrons in deep inelastic scattering at lepton-proton colliders.
Such radiation can be consistently described in the $b$-space resummation
formalism, which was originally developed to improve theoretical description of
production of hadrons at $e^+e^-$ colliders and electroweak vector bosons at
hadron-hadron colliders. I present the detailed derivation of the resummed
cross section and the energy flow at the next-to-leading order of perturbative
QCD. The theoretical results are compared to the experimental data measured at
the $ep$ collider HERA. I argue that semi-inclusive deep inelastic scattering
(SIDIS) at lepton-hadron colliders offers exceptional opportunities to study
coherent parton radiation, which are not available yet at colliders of other
types.


title:
SN1987A and the Status of Oscillation Solutions to the Solar Neutrino
  Problem (including an appendix discussing the NC and day/night data from SNO)

abstract:
  We study neutrino oscillations and the level-crossing probability PLZ in
power-law potential profiles A(r)\propto r^n. We give local and global
adiabaticity conditions valid for all mixing angles theta and discuss different
representations for PLZ. For the 1/r^3 profile typical of supernova envelopes
we compare our analytical to numerical results and to earlier approximations
used in the literature. We then perform a combined likelihood analysis of the
observed SN1987A neutrino signal and of the latest solar neutrino data,
including the recent SNO CC measurement. We find that, unless all relevant
supernova parameters (released binding energy, \bar\nu_e and \bar\nu_{\mu,\tau}
temperatures) are near their lowest values found in simulations, the status of
large mixing type solutions deteriorates considerably compared to fits using
only solar data. This is sufficient to rule out the vacuum-type solutions for
most reasonable choices of astrophysics parameters. The LOW solution may still
be acceptable, but becomes worse than the SMA-MSW solution which may, in some
cases, be the best combined solution. On the other hand the LMA-MSW solution
can easily survive as the best overall solution, although its size is generally
reduced when compared to fits to the solar data only.


title: Late decaying axino as CDM and its lifetime bound

abstract:
  The axino with mass in the GeV region can be cold dark matter(CDM) in the
galactic halo. However, if R-parity is broken, for example by the bilinear
terms $\mu_\alpha$, then axino($\tilde a$) can decay to $\nu+\gamma$. In this
case, the most stringent bound on the axino lifetime comes from the diffuse
photon background and we obtain that the axino lifetime should be greater than
$3.9\times 10^{24}\Omega_{\tilde a}h$ s which amounts to a very small bilinear
R-parity violation, i.e. $\mu_\alpha<1$ keV. This invalidates the atmospheric
neutrino mass generation through bilinear R-violating terms within the context
of axino CDM.


title: Running and Matching from 5 to 4 Dimensions

abstract:
  We study 5 dimensional grand-unified theories in an orbifold geometry by the
method of effective field theory: we match the low and high energy theories by
integrating out at 1-loop the massive Kaluza-Klein states. In the
supersymmetric case the radius dependence of threshold effects is fixed by the
rescaling anomalies of the low energy theory. We focus on a recently proposed
SU(5) model on $M^4 \times S^1/(Z_2\times Z_2^\prime)$. Even though the
spectrum of the heavy modes is completely known, there still are corrections to
gauge unification originating from boundary couplings. In order to control
these effects one has to rely on extra assumptions. We argue that, as far as
gauge couplings are concerned, the predictive power of these models is similar
to conventional GUTs.


title: Comments on Color-Suppressed Hadronic B Decays

abstract:
  Recent experimental results on the color-suppressed nonleptonic decays B^0 ->
D^{(*)0} pi^0 provide evidence for a failure of the naive factorization model
and for sizeable relative strong-interaction phases between class-1 and class-2
B -> D^(*) pi decay amplitudes. The allowed regions for the corresponding
ratios of (complex) isospin amplitudes and a_2/a_1 parameters are determined.
The results are interpreted in the context of QCD factorization for the related
class-1 amplitudes in the heavy-quark limit.


title: Not Even Decoupling Can Save Minimal Supersymmetric SU(5)

abstract:
  We make explicit the statement that Minimal Supersymmetric SU(5) has been
excluded by the Super-Kamiokande search for the process $p \to K^{+}
\overline{\nu}$. This exclusion is made by first placing limits on the colored
Higgs triplet mass, by forcing the gauge couplings to unify. We also show that
taking the superpartners of the first two generations to be very heavy in order
to avoid flavor changing neutral currents, the so-called ``decoupling'' idea,
is insufficient to resurrect the Minimal SUSY SU(5). We comment on various
mechanisms to further suppress proton decay in SUSY SU(5). Finally, we address
the contributions to proton decay from gauge boson exchange in the Minimal SUSY
SU(5) and flipped SU(5) models.


title: Nucleon form factors and structure functions from Lattice QCD

abstract:
  In this talk we highlight recent lattice calculations of the nucleon form
factors and structure functions.


title: A possible resolution of the e+e- --> Nbar N puzzle

abstract:
  We sketch some recent ideas proposed as the mechanism behind the puzzling
experimental results on baryon-antibaryon production in e+e- annihilation close
to threshold. The essential new point in the proposed mechanism is that it is a
two-stage process, with a coherent state of pions serving as an intermediary
between e+e- and the baryon-antibaryon system. Skyrmion-antiskyrmion
annihilation is proposed as a concrete computational framework for a
quantitative description of the baryon-antibaryon annihilation. We also point
out the possible connection to similarly puzzling data on baryon-antibaryon
production in photon-photon collision.


title: Light fermion mass generation in dynamical symmetry breaking

abstract:
  We reconsider the question of mass generation for fermions coupled to a set
of gauge bosons when the latter get their masses through the Goldstone bosons
originating in a simple (i.e. not extended) technicolor sector. The fermion
global chiral symmetries are broken by including four-fermion interactions. We
find that the system can be nonperturbatively unstable under fermion mass
fluctuations driving the formation of an effective coupling between the
technigoldstone bosons and the ordinary fermions. Minimization of an effective
action for the corresponding composite operators describes then dynamical
generation of light fermion masses of order M exp(-k/g^2), where M is some
cutoff mass.


title: Electron-neutrino survival probability from solar-neutrino data

abstract:
  With SNO data on electron-neutrino flux from the sun, it is possible to
derive the $\nu_e$ survival probability $P_{ee}(E)$ from existing experimental
data of Super-Kamiokande, gallium experiments and Homestake. The combined data
of SNO and Super-Kamiokande provide boron $\nu_e$ flux and the total flux of
all active boron neutrinos, giving thus $P_{ee}(E)$ for boron neutrinos. The
Homestake detector, after subtraction of the signal from boron neutrinos, gives
the flux of Be+CNO neutrinos, and $P_{ee}$ for the corresponding energy
interval, if the produced flux is taken from the Standard Solar Model (SSM).
Gallium detectors, GALLEX, SAGE and GNO, detect additionally pp-neutrinos. The
pp-flux can be calculated subtracting from the gallium signal the rate due to
boron, beryllium and CNO neutrinos. The ratio of the measured $pp$-neutrino
flux to that predicted by the SSM gives the survival probability for
$pp$-neutrinos. Comparison with theoretical survival probabilities shows that
the best (among known models) fit is given by LMA and LOW solutions.


title: Leptonic CP Violation at the neutrino factory

abstract:
  In this talk, based on the work \cite{cpviolation}, we refine our previous
analysis \cite{golden} of the sensitivity to leptonic CP violation and
$\tetaot$ at a neutrino factory in the LMA-MSW scenario, by exploring the full
range of these two parameters. We have discovered that there exist, at fixed
neutrino energy, $E_\nu$, and baseline, $L$, degenerate solutions. Although the
spectral analysis helps in disentangling fake from true solutions, a leftover
product of this degeneracy remains for a realistic detector, which we analyse.
Furthermore, we take into account the expected uncertainties on the solar and
atmospheric oscillation parameters and in the average Earth matter density
along the neutrino path. An intermediate baseline of O(3000) km is still the
best option to tackle CP violation, although a combination of two baselines
turns out to be very important in resolving degeneracies. This summary is based
on a talk given at NUFACT01, May 2001, Tsukuba (Japan).


title:
Heavy-Light Meson Decay Constant from QCD Sum Rules in Three-Loop
  Approximation

abstract:
  In this paper we compute the decay constant of the pseudo-scalar heavy-light
mesons in the heavy quark effective theory framework of QCD sum rules. In our
analysis we include the recently evaluated three-loop result of order
$\alpha_s^2$ for the heavy-light current correlator. The value of the bottom
quark mass, which essentially limits the accuracy of the sum rules for $B$
meson, is extracted from the nonrelativistic sum rules for $\Upsilon$
resonances in the next-to-next-to-leading approximation. We find stability of
our result with respect to all types of corrections and the specific form of
the sum rule which reduces the uncertainty. Our results $f_B=206\pm 20$ MeV and
$f_D=195\pm 20$ MeV for the $B$ and $D$ meson decay constants are in impressive
agreement with recent lattice calculations.


title: Chiral Lagrangians

abstract:
  An overview of the field of Chiral Lagrangians is given. This includes Chiral
Perturbation Theory and resummations to extend it to higher energies,
applications to the muon anomalous magnetic moment, $\epsilon^\prime/\epsilon$
and others.


title: Fermion Masses and Mixing Angles from SU(3) Family Symmetry

abstract:
  We propose a model based on SU(3) family symmetry which leads to a successful
description of quark and lepton masses and mixing angles including approximate
bi-maximal mixing in the neutrino sector suitable for the LOW or quasi-vacuum
solar solutions, with the atmospheric angle predicted to be accurately maximal
due to the SU(3) symmetry. The model predicts a CHOOZ angle $\theta_{13}\sim
|V_{ub}|.$ The SU(3) symmetry can also ensure the near degeneracy of squarks
and sleptons needed to avoid large flavour changing neutral currents.


title:
Non-Equilibrium Large N Yukawa Dynamics: marching through the Landau
  pole

abstract:
  The non-equilibrium dynamics of a Yukawa theory with N fermions coupled to a
scalar field is studied in the large N limit with the goal of comparing the
dynamics predicted from the renormalization group improved effective potential
to that obtained including the fermionic backreaction. The effective potential
is of the Coleman-Weinberg type. Its renormalization group improvement is
unbounded from below and features a Landau pole. When viewed self-consistently,
the initial time singularity does not arise. The different regimes of the
dynamics of the fully renormalized theory are studied both analytically and
numerically. Despite the existence of a Landau pole in the model, the dynamics
of the mean field is smooth as it passes the location of the pole. This is a
consequence of a remarkable cancellation between the effective potential and
the dynamical chiral condensate. The asymptotic evolution is effectively
described by a quartic upright effective potential. In all regimes, profuse
particle production results in the formation of a dense fermionic plasma with
occupation numbers nearly saturated up to a scale of the order of the mean
field. This can be interpreted as a chemical potential. We discuss the
implications of these results for cosmological preheating.


title:
Bilepton gauge boson contribution to the static electromagnetic
  properties of the W boson in the minimal 331 model

abstract:
  We present a complete calculation of the singly and doubly charged gauge
bosons (bileptons) contribution to the static properties of the W boson in the
framework of the minimal 331 model, which accommodates the bileptons in an
SU_L(2) doublet. A nonlinear R_\xi gauge is used and a slightly modified
version of the Passarino-Veltman reduction scheme is employed as in this case
the Gram determinant vanishes. It is found that the bilepton contribution is of
the same order of magnitude as those arising from other weakly coupled
renormalizable theories, like the two-Higgs doublet model and supersymmetry.
The heavy mass limit is explored and the nontrivial decoupling properties of
bileptons are discussed. Although there is a close resemblance with the
contribution of an SU_L(2) fermion doublet, in the case of the bilepton doublet
the decoupling theorem does remain valid. As a by-product, we present a
detailed study of the trilinear and the quartic vertices involving the
bileptons and the standard model gauge bosons.


title: Shape versus Volume: Making Large Flat Extra Dimensions Invisible

abstract:
  Much recent attention has focused on theories with large extra compactified
dimensions. However, while the phenomenological implications of the volume
moduli associated with such compactifications are well understood, relatively
little attention has been devoted to the shape moduli. In this paper, we show
that the shape moduli have a dramatic effect on the corresponding Kaluza-Klein
spectra: they change the mass gap, induce level crossings, and can even be used
to interpolate between theories with different numbers of compactified
dimensions. Furthermore, we show that in certain cases it is possible to
maintain the ratio between the higher-dimensional and four-dimensional Planck
scales while simultaneously increasing the Kaluza-Klein graviton mass gap by an
arbitrarily large factor. This mechanism can therefore be used to alleviate (or
perhaps even eliminate) many of the experimental bounds on theories with large
extra spacetime dimensions.


title:
New light on electromagnetic corrections to the scattering parameters
  obtained from experiments on pionium

abstract:
  We calculate the electromagnetic corrections needed to obtain isospin
invariant hadronic pion-pion s-wave scattering lengths a^0, a^2 from the
elements a_cc, a_0c of the s-wave scattering matrix for the (\pi^+ \pi^-, \pi^0
\pi^0) system at the \pi^+ \pi^- threshold. These elements can be extracted
from experiments on pionium. Our calculation uses energy independent hadronic
pion-pion potentials that satisfactorily reproduce the low-energy phase shifts
given by two-loop chiral pertur- bation theory. We also take into account an
important relativistic effect whose inclusion influences the corrections
considerably.


title: Analysis of the Neutralino System in Supersymmetric Theories

abstract:
  Charginos $\tilde{\chi}^\pm$ and neutralinos $\tilde{\chi}^0$ in
supersymmetric theories can be produced copiously at $e^+e^-$ colliders and
their properties can be measured with high accuracy. Consecutively to the
chargino system, 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 in the gaugino/higgsino sector of the minimal
supersymmetric extension of the Standard Model, the U(1) gaugino mass $M_1$,
can be analyzed in the neutralino system, including its modulus and its phase
in CP-noninvariant theories. The CP properties of the neutralino system are
characterized by unitarity quadrangles. Analytical solutions for the neutralino
mass eigenvalues and for the mixing matrix are presented for CP-noninvariant
theories in general. They can be written in compact form for large
supersymmetric mass parameters. The closure of the neutralino and chargino
systems can be studied by exploiting sum rules for the pair-production
processes in $e^+e^-$ collisions. Thus the picture of the non-colored gaugino
and higgsino complex in supersymmetric theories can comprehensively be
reconstructed in these experiments.


title:
Proton-Proton Total Cross-Sections from the Window of Cosmic Ray
  Experiments

abstract:
  The importance of cosmic-ray experimental measurements of proton-proton total
cross sections to understand the underlying fundamental dynamics is discussed.
It is shown that early discovered global structure of proton-proton total cross
section [5,17] is completely compatible with the values obtained from
cosmic-ray experiments.


title: Rare K decays in a model of quark and lepton masses

abstract:
  An extension of a model of neutrino masses to the quark sector provides an
interesting link between these two sectors. A parameter which is important to
describe neutrino oscillations and masses is found to be a crucial one
appearing in various ``penguin'' operators, in particular the so-called Z
penguin. This parameter is severely constrained by the rare decay process
$K_{L} \to \mu^{+} \mu^{-}$. This in turn has interesting implications on the
decay rates of other rare processes such as $K_{L} \to \mu e$, etc..., as well
as on the masses of the neutrinos and the masses of the vector-like quarks and
leptons which appear in our model.


title: N=2 Supersymmetric GUT Breaking on $T^2$ Orbifolds

abstract:
  We study the 6-dimensional N=2 supersymmetric grand unified theories with
gauge group SU(N) and $ SO(M)$ on the extra space orbifolds $T^2/(Z_2)^3$ and
$T^2/(Z_2)^4$, which can be broken down to the 4-dimensional N=1 supersymmetric
$SU(3)\times SU(2)\times U(1)^{n-3}$ model for the zero modes. We also study
the models which have two SU(2) Higgs doublets (zero modes) from the
6-dimensional vector multiplet. We give the particle spectra, present the
fields, the number of 4-dimensional supersymmetry and gauge group on the
observable 3-brane or 4-brane and discuss some phenomenology for those models.
Furthermore, we generalize our procedure for $(4+m)$-dimensional $N$
supersymmetric GUT breaking on the space-time $M^4\times T^m/(Z_2)^L$.


title: Evading the CKM Hierarchy: Intrinsic Charm in B Decays

abstract:
  We show that the presence of intrinsic charm in the hadrons' light-cone wave
functions, even at a few percent level, provides new, competitive decay
mechanisms for B decays which are nominally CKM-suppressed. For example, the
weak decays of the B-meson to two-body exclusive states consisting of strange
plus light hadrons, such as B\to\pi K, are expected to be dominated by penguin
contributions since the tree-level b\to s u\bar u decay is CKM suppressed.
However, higher Fock states in the B wave function containing charm quark pairs
can mediate the decay via a CKM-favored b\to s c\bar c tree-level transition.
Such intrinsic charm contributions can be phenomenologically significant. Since
they mimic the amplitude structure of ``charming'' penguin contributions,
charming penguins need not be penguins at all.


title: Implications of the Muon Anomalous Magnetic Moment for Supersymmetry

abstract:
  We re-examine the bounds on supersymmetric particle masses in light of the
E821 data on the muon anomalous magnetic moment. We confirm, extend and
supersede previous bounds. In particular we find (at one sigma) no lower limit
on tan(beta) or upper limit on the chargino mass implied by the data at
present, but at least 4 sparticles must be lighter than 700 to 820 GeV and at
least one sparticle must be lighter than 345 to 440 GeV. However, the E821
central value bounds tan(beta) > 4.7 and the lighter chargino mass by 690 GeV.
For tan(beta) < 10, the data indicates a high probability for direct discovery
of SUSY at Run II or III of the Tevatron.


title: Neutrino oscillations and Big Bang Nucleosynthesis

abstract:
  We outline how relic neutrino asymmetries may be generated in the early
universe via active-sterile neutrino oscillations. We discuss possible
consequences for big bang nucleosynthesis, within the context of a particular
4-neutrino model.


title: A Chiral Effective Field Theory and Radiative Decays of Mesons

abstract:
  An extended $U(3)_L\bigotimes U(3)_R$ chiral effective field theory which
includes pseudoscalar and vector meson nonets as dynamic variables is
presented. The theory combines a hidden symmetry approach with a general
procedure of including the $\eta'$ meson into chiral theory, and accounts for
$direct$ and $indirect$ symmetry breaking effects via a mechanism based on the
quark mass matrix. The theory is applied to anomalous radiative decays using
particle mixing schemes, corresponding to different symmetry breaking
assumptions and uniquely determined by the lagarngian presumed. Radiative
decays of light flavor mesons are best explained within the framework of a one
mixing angle scheme and provide evidence for $SU(3)_F$ and nonet symmetry
breaking.


title: Spectral function at high temperature in the classical approximation

abstract:
  At high temperature the infrared modes of a weakly coupled quantum field
theory can be treated nonperturbatively in real time using the classical field
approximation. We use this to introduce a nonperturbative approach to the
calculation of finite-temperature spectral functions, employing the classical
KMS condition in real time. The method is illustrated for the one-particle
spectral function in a scalar field theory in 2+1 dimensions. The result is
compared with resummed two-loop perturbation theory and both the plasmon mass
and width are found to agree with the analytical prediction.


title: Scattering of Leptons in Hot and Dense Media

abstract:
  We study the propagation of leptons in hot and dense media and estimate the
background corrections to the purely leptonic processes in the early universe
and in the stellar cores.


title:
A C++ Code to Solve the DGLAP Equations Applied to Ultra High Energy
  Cosmic Rays

abstract:
  We solve numerically the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP)
equations for the evolution of fragmentation functions using the Laguerre
method. We extend this method to include supersymmetric evolution. The solution
to the DGLAP equations is particularly interesting to calculate the expected
spectra of Ultra High Energy Cosmic Rays in models where they are produced by
the decay of a massive particle X, M_X > 10^{12} GeV.


title: Possible Z-width probe of a "brane-world" scenario for neutrino masses

abstract:
  The possibility that the accurately known value of the Z width might furnish
information about the coupling of two neutrinos to the Majoron (Nambu-Goldstone
boson of spontaneous lepton number violation) is proposed and investigated in
detail. Both the "ordinary" case and the case in which one adopts a "brane"
world picture with the Majoron free to travel in extra dimensions are studied.
Bounds on the dimensionless coupling constants are obtained, allowing for any
number of extra dimensions and any intrinsic mass scale. These bounds may be
applied to a variety of different Majoron models. If a technically natural
see-saw model is adopted, the predicted coupling constants are far below these
upper bounds. In addition, for this natural model, the effect of extra
dimensions is to decrease the predicted partial Z width, the increase due to
many Kaluza-Klein excitations being compensated by the decrease of their common
coupling constant.


title:
Bounds on Direct Couplings of Superheavy Metastable Particles to the
  Inflaton Field from Ultra High Energy Cosmic Ray Events

abstract:
  Top-down models for the origin of ultra high energy cosmic rays (UHECR's)
propose that these events are the decay products of relic superheavy metastable
particles, usually called $X$ particles. These particles can be produced in the
reheating period following the inflationary epoch of the early Universe. We
obtain constraints on some parameters such as the lifetime and direct couplings
of the $X$-particle to the inflaton field from the requirement that they are
responsible for the observed UHECR flux.


title: Effective Neutrino Mass Operators: A Guide to Model Building

abstract:
  Effective operators relevant for generating small Majorana masses for the
neutrinos in the Standard Model will be considered. These operators serve as a
useful guide for building models of neutrino mass. Some of these operators are
represented by familiar models in the literature, and others lead to
interesting new models. The number of relevant operators will be drastically
reduced if neutrinoless double beta decays are observed in current experiments.


title: Composite quarks and leptons in higher space-time dimensions

abstract:
  A new approach towards the composite structure of quarks and leptons in the
context of the higher dimensional unified theories is proposed. Owing to the
certain strong dynamics, much like an ordinary QCD, every possible vectorlike
multiplets of composites appear in higher dimensional bulk space-time, however,
through a proper Sherk-Schwarz compactification only chiral set of composite
quarks and leptons survive as the massless states in four dimensions. In this
scenario restrictions related with the 't Hooft's anomaly matching condition
are turned out to be avoided and, as a result, the composite models look rather
simple and economic. We demonstrate our approach by an explicit construction of
model of preons and their composites unified in the supersymmetric SU(5) GUT in
five space-time dimensions. The model predicts exactly three families of the
composite quarks and leptons being the triplets of the chiral horizontal
symmetry SU(3)_h which automatically appears in the composite spectrum when
going to ordinary four dimensions.


title:
Spectral representation and QCD sum rules for nucleon at finite
  temperature

abstract:
  We examine the problem of constructing spectral representations for two point
correlation functions, needed to write down the QCD sum rules in the medium. We
suggest constructing them from the Feynman diagrams for the correlation
functions. As an example we use this procedure to write the QCD sum rules for
the nucleon current at finite temperature.


title: Progress in Meson-Nucleon Physics: Status and Perspectives

abstract:
  In this opening talk I will address some issues that exemplify the
theoretical progress that has been made and is to be expected in the field of
meson-nucleon physics. My emphasis will be on performing precision calculations
to test aspects of QCD, including also electroweak probes. In addition, I
discuss the problems and opportunities related to the strange quark sector.


title:
piN scattering and electromagnetic corrections in the perturbative
  chiral quark model

abstract:
  We apply the perturbative chiral quark model to give predictions for the
electromagnetic O(p^2) low-energy couplings of the ChPT effective Lagrangian
that define the electromagnetic mass shifts of nucleons and first-order (e^2)
radiative corrections to the piN scattering amplitude. We estimate the leading
isospin-breaking correction to the strong energy shift of the pi(-)p atom in
the 1s state, which is relevant for the experiment "Pionic Hydrogen" at PSI.


title: f_B and f_B_s from QCD sum rules

abstract:
  The decay constants of the pseudoscalar mesons B and B_s are evaluated from
QCD sum rules for the pseudoscalar two-point function. Recently calculated
perturbative three-loop QCD corrections are incorporated into the sum rule. An
analysis in terms of the bottom quark pole mass turns out to be unreliable due
to large higher order radiative corrections. On the contrary, in the MS_bar
scheme the higher order corrections are under good theoretical control and a
reliable determination of f_B and f_{B_s} becomes feasible.
  Including variations of all input parameters within reasonable ranges, our
final results for the pseudoscalar meson decay constants are f_B = 210 +- 19
MeV and f_B_s = 244 +- 21 MeV. Employing additional information on the product
sqrt(B_B) f_B from global fits to the unitarity triangle, we are in a position
to also extract the B-meson B-parameter B_B = 1.26 +- 0.45. Our results are
well compatible with analogous determinations of the above quantities in
lattice QCD.


title: Breaking CPT by mixed non-commutativity

abstract:
  The mixed component of the non-commutative parameter \theta_{\mu M}, where
\mu = 0,1,2,3 and M is an extra dimensional index may violate four-dimensional
CPT invariance. We calculate one and two-loop induced couplings of \theta_{\mu
5} with the four-dimensional axial vector current and with the CPT odd dim=6
operators starting from five-dimensional Yukawa and U(1) theories. The
resulting bounds from clock comparison experiments place a stringent constraint
on \theta_{\mu 5}, |\theta_{\mu 5}|^{-1/2} > 5\times 10^{11} GeV. The orbifold
projection and/or localization of fermions on a 3-brane lead to CPT-conserving
physics, in which case the constraints on \theta{\mu 5} are softened.


title: Maximal Neutrino Mixing from an Attractive Infrared Fixed Point

abstract:
  In the Standard Model (and MSSM), renormalization effects on neutrino mixing
are generally very small and the attractive fixed points are at vanishing
neutrino mixing. However for multi-higgs extensions of the Standard Model,
renormalization effects on neutrino mixing can be large and nontrivial fixed
points are possible. Here we examine a simple two-higgs model. For two flavors,
maximal mixing is an attractive infrared fixed point. For three flavors, the
neutrino mass matrix evolves towards large off-diagonal elements at low
energies. The experimentally suggested bimaximal neutrino mixing pattern is one
possible attractive infrared fixed point.


title: Supersymmetry and the positron excess in cosmic rays

abstract:
  Recently the HEAT balloon experiment has confirmed an excess of high-energy
positrons in cosmic rays. They could come from annihilation of dark matter in
the galactic halo. We discuss expectations for the positron signal in cosmic
rays from the lightest superpartner. The simplest interpretations are
incompatible with the size and shape of the excess if the relic LSPs evolved
from thermal equilbrium. Non-thermal histories can describe a sufficient
positron rate. Reproducing the energy spectrum is more challenging, but perhaps
possible. The resulting light superpartner spectrum is compatible with collider
physics, the muon anomalous magnetic moment, Z-pole electroweak data, and other
dark matter searches.


title:
SO(10) grand unification in five dimensions: Proton decay and the mu
  problem

abstract:
  We construct a minimal supersymmetric SO(10) grand unified model in 5
dimensions. The extra dimension is compactified on an S^1/(Z_2 x Z_2^\prime)
orbifold which has two in-equivalent fixed points. These are flat 4-dimensional
Minkowski spaces: the visible and the hidden branes. By orbifolding, the gauge
symmetry on the hidden brane is reduced down to the Pati--Salam gauge symmetry
SU(4) x SU(2)_L x SU(2)_R. On the visible brane the SO(10) is broken by the
ordinary Higgs mechanism down to SU(5). The resulting 4-dimensional theory has
the standard model gauge symmetry (the intersection of SU(5) and SU(4) x
SU(2)_L x SU(2)_R) and the massless spectrum consists of the MSSM gauge fields
and two Higgs doublets. The matter fields are assumed to live on the visible
brane. We discuss gauge coupling unification in our 5-dimensional model in
terms of corrections to the conventional 4-dimensional unification.
Supersymmetry is broken on the hidden brane (where mass terms for gauginos and
a mu term are generated) and communicated to squarks and sleptons via gaugino
mediation. We also discuss a possibility of linking the supersymmetry breaking
on the hidden brane to the Higgs mechanism responsible for partial breaking of
the gauge symmetry on the visible brane via the shining mechanism. Finally,
there are no operators of dimension 5 leading to proton decay. Proton decay
through dimension 6 operators is enhanced compared to conventional GUTs and can
be seen in current or next generation proton decay experiments.


title: Mass inequalities in two dimensional gauged four fermi models

abstract:
  We quantitatively analyze the meson mass inequality relations of two
dimensional gauged four fermi models in the large N limit. The class of models
we study includes the 't Hooft model, the chiral and non-chiral Gross-Neveu
models as special points in the space of field theories. Cases where the chiral
symmetry is spontaneously or explicitly broken are both studied. We study the
meson mass inequality quantitatively and define a susceptibility which allows
us to systematically analyze the inequality. In the generalized Gross-Neveu
model limit, we derive an analytic expression for this susceptibility. Even
though no analytic proof of the validity of the classic mass inequality exists
for the generic case, the mass inequality is found to be positive throughout
most of the parameter space. We point out that the inequality might be negative
in certain cases.


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

abstract:
  In this paper, we study nonleptonic charmless B decays to two light
pseudoscalar mesons within the frame of QCD factorization, including the
contributions from the chirally enhanced power corrections and weak
annihilation. Predictions for the CP-averaged branching ratios and CP-violating
asymmetries are given. Within the reasonable range of the parameters, we find
that our predictions for the branching ratios of B -> PP are consistent with
the present experimental data. But because of the logarithmic divergences at
the endpoints in the hard spectator scatterings and weak annihilation, there
are still large uncertainties in these predictions.


title: Beyond "naive" factorization in exclusive radiative B-meson decays

abstract:
  We apply the QCD factorization approach to exclusive, radiative B meson
decays in the region of small invariant photon mass. We calculate factorizable
and non-factorizable corrections to leading order in the heavy quark mass
expansion and next-to-leading order in the strong coupling constant.
Phenomenological consequences for the B -> K* gamma decay rate and the B -> K*
ell+ ell- forward-backward asymmetry are discussed.


title: Generalized Parton Distributions : Experimental aspects

abstract:
  After briefly outlining the formalism of the Generalized Parton Distributions
(GPDs) in the first sections, we discuss some general considerations for their
experimental study : in particular, the relation between GPDs and experimental
observables and the need and requirements for a dedicated experimental
facility. Also, we review and comment the first experimental signatures of this
physics recently observed by the HERMES and CLAS (at JLab) collaborations.


title:
Charge Asymmetry and Photon Energy Spectrum in the Decay $B_s \to l^+
  l^- \gamma$

abstract:
  We consider the structure-dependent amplitude of the decay $B_s \to l^+ l^-
\gamma$ $(l=e,\mu)$ in a model based on the effective Hamiltonian for $b
\bar{s} \to l^+ l^-$ containing the Wilson coefficients $C_7,C_9$ and $C_{10}$.
The form factors characterising the matrix elements $< \gamma | \bar{s}
\gamma_\mu (1 \mp \gamma_5) b | \bar{B}_s>$ and $< \gamma | \bar{s}
\sigma_{\mu\nu} (1 \mp \gamma_5) b | \bar{B}_s>$ are taken to have the
universal form $f_V \approx f_A \approx f_T \approx f_{B_s} M_{B_s} R_s / (3
E_\gamma)$ suggested by recent work in QCD, where $R_s$ is a parameter related
to the light cone wave function of the $B_s$ meson. Simple expressions are
obtained for the charge asymmetry $A(x_\gamma)$ and the photon energy spectrum
$d \Gamma/ d x_\gamma (x_\gamma = 2 E_\gamma/M_{B_s})$. The decay rates are
calculated in terms of the decay rate of $B_s \to \gamma \gamma$. The branching
ratios are estimated to be $Br(B_s \to e^+ e^- \gamma) = 2.0 \times 10^{-8}$
and $Br(B_s \to \mu^+ \mu^- \gamma) = 1.2 \times 10^{-8}$, somewhat higher than
earlier estimates.


title: A non-resonant dark-side solution to the solar neutrino problem

abstract:
  We re-analyse spin-flavour precession solutions to the solar neutrino problem
in the light of the recent SNO CC result as well as the 1258--day
Super-Kamiokande data and the upper limit on solar anti-neutrinos. In a
self-consistent magneto-hydrodynamics approach the resulting scheme has only 3
effective parameters: $\Delta m^2$, $\mu B_\perp$ and the neutrino mixing angle
$\theta$. We show how a rates-only analysis for fixed $\mu B_\perp$ slightly
favours spin-flavour precession (SFP) solutions over oscillations (OSC). In
addition to the resonant solution (RSFP for short), there is a new non-resonant
solution (NRSFP) in the ``dark-side''. Both RSFP and NRSFP lead to flat recoil
energy spectra in excellent agreement with the latest SuperKamiokande data. We
also show that in the presence of a neutrino transition magnetic moment of
$10^{-11}$ Bohr magneton, a magnetic field of 80 KGauss eliminates all large
mixing solutions other than the so-called LMA solution.


title: Physics Potential and Prospects for CUORE and CUORICINO experiments

abstract:
  The CUORE (Cryogenic Underground Observatory for Rare Events) experiment
projects to construct and operate an array of 1000 cryogenic thermal detectors
of a mass of 760 g each to investigate rare events physics, in particular,
double beta decay and non baryonic particle dark matter. A first step towards
CUORE is CUORICINO, an array of 56 of such bolometers, currently being
installed in the Gran Sasso. In this paper we report the physics potential of
both stages of the experiment regarding neutrinoless double beta decay of
130Te, WIMP searches and solar axions.


title: How many sigmas is the solar neutrino effect?

abstract:
  The minimal standard electroweak model can be tested by allowing all the
solar neutrino fluxes, with undistorted energy spectra, to be free parameters
in fitting the measured solar neutrino event rates, subject only to the
condition that the total observed luminosity of the sun is produced by nuclear
fusion. The rates of the five experiments prior to SNO (chlorine, Kamiokande,
SAGE, GALLEX, Super-Kamiokande) cannot be fit by an arbitrary choice of
undistorted neutrino fluxes at the level of 2.5 sigma (formally 99% C.L.).
Considering just SNO and Super-Kamiokande, the discrepancy is at the 3.3 sigma
level(10^{-3} C.L.). If all six experiments are fit simultaneously, the formal
discrepancy increases to 4 sigma (7*10^{-5} C.L.). If the relative scaling in
temperature of the nuclear reactions that produce 7Be and 8B neutrinos is taken
into account, the formal discrepancy is at the 7.4 sigma level.


title: The luminosity constraint on solar neutrino fluxes

abstract:
  A specific linear combination of the total solar neutrino fluxes must equal
the measured solar photon luminosity if nuclear fusion reactions among light
elements are responsible for solar energy generation. This luminosity
constraint, previously used in a limited form in testing the no neutrino
oscillation hypothesis, is derived in a generality that includes all of the
relevant solar neutrino fluxes and which is suitable for analyzing the results
of many different solar neutrino experiments. With or without allowing for
neutrino oscillations, the generalized luminosity constraint can be used in
future analyses of solar neutrino data. Accurate numerical values for the
linear coefficients are provided.


title: Superfluid phases of quark matter, II: Phenomenology and sum rules

abstract:
  We derive sum rules for a uniform, isotropic superfluid quark-gluon plasma
with massless quarks, first laying out the phenomenological equations obeyed by
a color superconductor in terms of macroscopic observables such as the
superfluid mass and baryon densities, and the electric and magnetic gluon
masses, and then expressing these quantities in terms of equilibrium
correlation functions. From the transverse part of the long wavelength baryon
current-momentum correlation function we derive an exact expression for the
superfluid baryon density, and from the longitudinal part, an f-sum rule. From
the transverse part of the long wavelength color current-current correlation
function we derive the superfluid Meissner mass, and from the longitudinal
part, the Debye mass. These masses constrain integrals of the transverse and
longitudinal parts of the gluon propagator over frequencies, and provide
self-consistent conditions for a solution to the gap equation beyond weak
coupling.


title:
Effects of lepton number violating interactions on $t \bar t$ production
  at NLC

abstract:
  We discuss the effects of lepton number violating interactions namely,
R-parity violation and leptoquarks on top quark pair production at the upcoming
$e^+ e^-$ linear colliders. Effects of SU(2) singlet, doublet and triplet
leptoquark interactions are investigated. R-parity violating minimal
supersymmetric standard model also allows certain kinds of lepton number
violating interactions which are same as singlet leptoquarks with left-handed
interactions. We have calculated the cross-section of $e^+ e^- \to t \bar t$ in
presence of the above interactions. With conservative values of lepton number
violating coupling strengths we got enhancement of top-pair production
cross-section in all of the above cases.


title: $O(\alpha_s)$ Corrections to $B \to X_s e^+ e^-$ Decay in the 2HDM

abstract:
  $O(\alpha_s)$ QCD corrections to the inclusive $B \to X_s e^+ e^-$ decay are
investigated within the two - Higgs doublet extension of the standard model
(2HDM). The analysis is performed in the so - called off-resonance region; the
dependence of the obtained results on the choice of the renormalization scale
is examined in details. It is shown that $O(\alpha_s)$ corrections can suppress
the $B \to X_s e^+ e^-$ decay width up to $1.5 \div 3$ times (depending on the
choice of the dilepton invariant mass $s$ and the low - energy scale $\mu$). As
a result, in the experimentally allowed range of the parameters space, the
relations between the $B \to X_s e^+ e^-$ branching ratio and the new physics
parameters are strongly affected. It is found also that though the
renormalization scale dependence of the $B \to X_s e^+ e^-$ branching is
significantly reduced, higher order effects in the perturbation theory can
still be nonnegligible.


title:
Supersymmetric Grand Unification Model with the Orbifold Symmetry
  Breaking in the Six Dimensional Supergravity

abstract:
  We construct supersymmetric (SUSY) grand unification (GUT) models in the six
dimensional space-time where the GUT symmetry is broken down to the
standard-model gauge group by a simple orbifolding T^2/Z_4 or T^2/Z_6 and a
pair of massless Higgs doublets in the SUSY standard model are naturally
obtained. Since the background geometry here is simple compared with models
using the Scherk-Schwarz mechanism, one might hope for an approximate gauge
coupling unification in the present models. Here, the presence of the massless
Higgs multiplets in the bulk is quite natural, since the anomaly cancellation
in the six dimensional space-time requires N=2 hyper multiplets in the bulk,
some of which are origins of the Higgs doublets. However, the origin of the
quarks and leptons is still not clear at all.


title: Closed System of Equations on a Brane

abstract:
  We obtain a generic closed system of equations on a brane that describes its
inner evolution and give a method for extending solutions on the brane to the
bulk. We also discuss the cosmological implications of the closed system of
equations obtained. We consider bulk spaces with both spacelike and timelike
extra dimension, with and without the $Z_2$ symmetry of reflection relative to
the brane.


title:
Top Quark Pair Production at $e^+e^-$ Colliders in the Topcolor-assisted
  Technicolor Model

abstract:
  In the framework of topcolor-assisted technicolor model we calculate the
contributions from the pseudo Goldstone bosons and new gauge bosons to $e^+e^-
\to t\bar{t}$. We find that, for reasonable ranges of the parameters, the
pseudo Goldstone bosons afford dominate contribution, the correction arising
from new gauge bosons is negligibly small, the maximum of the relative
corrections is -10% with the center-of-mass energy $\sqrt{s}=500$ GeV; whereas
in case of $\sqrt{s}=1500$ GeV, the relative corrections could be up to 16%.
Thus large new physics might be observable at the experiments of
next-generation linear colliders.


title: Consistent Prediction for Direct CP Violation and \Delta I = 1/2 Rule

abstract:
  The theoretical status of direct CP violation $\epsilon'/\epsilon$ is briefly
reviewed. Special attention is paid to the recent new consistent predictions
for both the ratio $\epsilon'/\epsilon$ and the $\Delta I = 1/2$ rule within
the standard model. In particular, two matching conditions resulting from the
matching between the QCD and chiral perturbation theory(ChPT), and also some
algebraic relations of chiral operators are found to be very useful. It is of
interest that the new predictions are no longer sensitive to the strange quark
mass, and are also renormalization scale and scheme independent in the leading
QCD and chiral loop approximation with large $N_c$ approach. The new prediction
for the direct CP violation with the value $\epsilon'/\epsilon= (20 \pm 4)
\times 10^{-4} [Im\lambda_t /1.2\times 10^{-4}]$ is consistent with the most
recent experimental results reported by the NA48 and KTeV groups.


title: Pomerons

abstract:
  New small-$x$ data indicate the existence of two pomerons: the usual soft
pomeron with intercept close to 1.08, and a hard pomeron with intercept about
1.4


title: An effective model for quark masses and mixings

abstract:
  By analogy with an effective model of charged-lepton mass matrix that, with
the inputs of $m^{exp}_e $ and $m^{exp}_\mu$, predicts (in a perturbative zero
order) $m_\tau = 1776.80 $ MeV close to $m^{exp}_\tau =
1777.03^{+0.30}_{-0.26}$ MeV, we construct such a model for quark mass matrices
reproducing consistently the bulk of experimental information on quark masses
and mixings. In particular, the model predicts $|V_{u b}| = 0.00313$, $\gamma =
- \arg V_{u b} = 63.8^\circ$ and $|V_{t d}| = 0.00785$, $\beta = - \arg V_{t d}
= 20.7^\circ$ (i.e., $\sin 2\beta = 0.661$ to be compared with the BaBar value
$\sin 2\beta^{exp} = 0.59 \pm 0.14$), if the figures $|V^{exp}_{u s}| =
0.2196$, $|V^{exp}_{c b}| = 0.0402$ and $m^{exp}_{s} = 123$ MeV, $m^{exp}_{c} =
1.25$ GeV, $m^{exp}_{b} = 4.2$ GeV are used as inputs. Also the rest of CKM
matrix elements is predicted consistently by the experimental data. Here, quark
masses and CKM matrix elements (ten independent quantities) are parametrized by
eight independent model constants, what gives two independent predictions, e.g.
for $|V_{ub}|$ and $\beta$. The considered model deals with the
fundamental-fermion Dirac mass matrices, so that the neutrino Majorana mass
matrix is outside the scheme. Some foundations of the model are collected in
Appendix.


title: Small Active and Sterile Neutrino Masses from the TeV Scale

abstract:
  A new mechanism for understanding small neutrino masses using only simple new
physics at the TeV scale is proposed. As an application, it is shown how it can
naturally lead to the mass hierarchy of the so called bimaximal mixing in the
case of three active neutrinos, or the (3+1) scenarios for sterile neutrinos,
using only the $SU(2)_L$ quantum numbers of the particles.


title: Formation of topological defects in gauge field theories

abstract:
  When a symmetry gets spontaneously broken in a phase transition, topological
defects are typically formed. The theoretical picture of how this happens in a
breakdown of a global symmetry, the Kibble-Zurek mechanism, is well established
and has been tested in various condensed matter experiments. However, from the
viewpoint of particle physics and cosmology, gauge field theories are more
relevant than global theories. In recent years, there have been significant
advances in the theory of defect formation in gauge field theories, which make
precise predictions possible, and in experimental techniques that can be used
to test these predictions in superconductor experiments. This opens up the
possibility of carrying out relatively simple and controlled experiments, in
which the non-equilibrium phase transition dynamics of gauge field theories can
be studied. This will have a significant impact on our understanding of phase
transitions in the early universe and in heavy ion collider experiments. In
this paper, I review the current status of the theory and the experiments in
which it can be tested.


title: Towards the solution of Schwinger-Dyson equations in Minkowski space

abstract:
  This is an abstract of authors PhD thesis which is devoted to studies of
quantum field models with strong coupling. The {\em Schwinger-Dyson equations}
(SDEs) in momentum representation are solved in Minkowski space. The original
version of the paper hep-ph/0108160 is included in. The full text of author's
PhD thesis can be found at this WWW:
'http://gemma.ujf.cas.cz/~sauli/papers.html'


title: Towards a Theory of Flavor from Orbifold GUTs

abstract:
  We show that the recently constructed 5-dimensional supersymmetric
$S^1/(Z_2\times Z_2')$ orbifold GUT models allow an appealing explanation of
the observed hierarchical structure of the quark and lepton masses and mixing
angles. Flavor hierarchies arise from the geometrical suppression of some
couplings when fields propagate in different numbers of dimensions, or on
different fixed branes. Restrictions arising from locality in the extra
dimension allow interesting texture zeroes to be easily generated. In addition
the detailed nature of the SU(5)-breaking orbifold projections lead to simple
theories where $b-\tau$ unification is maintained but similar disfavored SU(5)
relations for the lighter generations are naturally avoided. We find that
simple 5d models based on $S^1/(Z_2\times Z_2')$ are strikingly successful in
explaining many features of the masses and mixing angles of the 2nd and 3rd
generation. Successful three generation models of flavor including neutrinos
are constructed by generalizing the $S^1/(Z_2\times Z'_2)$ model to six
dimensions. Large angle neutrino mixing is elegantly accommodated. Novel
features of these models include a simple $m_u=0$ configuration leading to a
solution of the strong CP problem.


title:
Validity Of The Vafa-Witten Proof On Absence Of Spontaneous Parity
  Breaking In QCD

abstract:
  The vacuum energy response of a quantum field theory is studied as a function
of complex external fields coupled to the symmetry-breaking observables of the
theory. It is found that the energy density is insensitive to spontaneous
symmetry breaking effects along a special direction in the complex plane. In
particular, in the case of vector-like gauge theories such as QCD, the change
in energy generated by coupling to pure-gluonic parity-odd operators is always
a growing function of the external fields along the real axis, independent of
the mode in which symmetry is realized. In light of this, although there is
little doubt that parity is not spontaneously broken in massive QCD, the
validity of the Vafa and Witten proof is, however, questionable.


title: Electric Dipole Moments in the Generic Supersymmetric Standard Model

abstract:
  The generic supersymmetric standard model is a model built from a
supersymmetrized standard model field spectrum the gauge symmetries only. The
popular minimal supersymmetric standard model differs from the generic version
in having R-parity imposed by hand. We review an efficient formulation of the
model and some of the recently obtained interesting phenomenological features,
focusing on one-loop contributions to fermion electric dipole moments.


title: CP Violation in Hyperon Decays

abstract:
  In this talk I review theoretical predictions for CP violation in
non-leptonic hyperon decays in the Standard Model and models beyond. In the
Standard Model the CP violating observable $A$ in the polarization asymmetries
of $\Lambda \to p \pi^-$ and $\Xi^- \to \Lambda \pi^-$ decays are predicted to
be in the ranges $(-0.61\sim 6.8)\times 10^{-5}$ and $-(0.1\sim 1)\times
10^{-5}$, respectively. These ranges are below the sensitivity of $1.4\times
10^{-4}$ for $A(\Lambda^0_-)+A(\Xi^0_-)$ for E871 experiment at Fermilab. When
going beyond the SM, such as, Supersymmetric and Left-Right symmetric models,
$A$ can be as large as $10^{-3}$ and a few times of $10^{-4}$, respectively.
Studies of hyperon decays can provide important information about CP violation.


title: Non-local anomaly of the axial-vector current for bound states

abstract:
  We demonstrate that the amplitude $<\rho\gamma|\partial_\nu (\bar q\gamma_\nu
\gamma_5 q)|0>$ does not vanish in the limit of zero quark masses. This
represents a new kind of violation of the classical equation of motion for the
axial current and should be interpreted as the axial anomaly for bound states.
The anomaly emerges in spite of the fact that the one loop integrals are
ultraviolet-finite as guaranteed by the presence of the bound-state wave
function. As a result, the amplitude behaves like $\sim 1/p^2$ in the limit of
a large momentum $p$ of the current. This is to be compared with the amplitude
$<\gamma\gamma|\partial_\nu \bar q\gamma_\nu \gamma_5 q|0>$ which remains
finite in the limit $p^2\to\infty$.
  The observed effect leads to the modification of the classical equation of
motion of the axial-vector current in terms of the non-local operator and can
be formulated as a non-local axial anomaly for bound states.


title: Exact analysis of the combined data of SNO and Super-Kamiokande

abstract:
  Comparison of solar-neutrino signals in SNO and Super-Kamiokande (SK)
detectors results in discovery of $\nu_e \to \nu_{\mu,\tau}$ oscillations at
level $3.1 - 3.3 \sigma$ \cite{SNO}. This comparison involves the assumption of
neutrino spectrum and a choice for the thresholds of detection in both
experiments. In this Letter we obtain an exact formula for the comparison of
the signals which is valid for arbitrary spectra and thresholds. We find that
the no-oscillation hypothesis is excluded at 3.3$\sigma$. If the
energy-dependent component of the survival probability for electron neutrinos
is small as compared with the average value, i.e. in the case of small
distortion of the observed spectrum, the oscillation hypothesis can also be
tested to similar accuracy. The oscillation to sterile neutrino only, is
excluded at $3.3 \sigma$ level, and oscillation to active neutrinos is
confirmed at the same level, though with some reservations.


title:
Supersymmetric Model of Muon Anomalous Magnetic Moment and Neutrino
  Masses

abstract:
  We propose the novel lepton-number relationship $L_\tau = L_e + L_\mu$, which
is uniquely realized by the interaction $(\hat \nu_e \hat \mu - \hat e \hat
\nu_\mu) \hat \tau^c$ in supersymmetry and may account for a possibly large
muon anomalous magnetic moment. Neutrino masses (with bimaximal mixing) may be
generated from the spontaneous and soft breaking of this lepton symmetry.


title:
Obtaining the large angle MSW solution to the solar neutrino problem in
  models

abstract:
  The large mixing angle (LMA) MSW solution to the solar neutrino problem seems
favored by the data at the moment over the small mixing angle (SMA) MSW
solution and the vacuum (VAC) solution. In this paper the various main types of
models of neutrino masses and mixings are studied from the point of view of how
naturally they can give the LMA solution. Special attention is given to a very
simple type of "lopsided" SU(5) model.


title: Lepton pair production in a charged quark gluon plasma

abstract:
  We investigate the effects of a charge asymmetry on the spectrum of dileptons
radiating from a quark gluon plasma. We demonstrate the existence of a new set
of processes in this regime. The dilepton production rate from the
corresponding diagrams is shown to be as important as that obtained from the
Born-term quark-antiquark annihilation.


title: Strongly Coupled Grand Unification in Higher Dimensions

abstract:
  We consider the scenario where all the couplings in the theory are strong at
the cut-off scale, in the context of higher dimensional grand unified field
theories where the unified gauge symmetry is broken by an orbifold
compactification. In this scenario, the non-calculable correction to gauge
unification from unknown ultraviolet physics is naturally suppressed by the
large volume of the extra dimension, and the threshold correction is dominated
by a calculable contribution from Kaluza-Klein towers that gives the values for
\sin^2\theta_w and \alpha_s in good agreement with low-energy data. The
threshold correction is reliably estimated despite the fact that the theory is
strongly coupled at the cut-off scale. A realistic 5d supersymmetric SU(5)
model is presented as an example, where rapid d=6 proton decay is avoided by
putting the first generation matter in the 5d bulk.


title:
On the Moduli Problem and 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 renders the scenario very difficult to work,
irrespective of the detail mechanism of the entropy production.


title: Baryogenesis via leptogenesis in SO(10) models

abstract:
  We discuss the baryogenesis via leptogenesis mechanism within the
supersymmetric and nonsupersymmetric SO(10) models. We find that the
nonsupersymmetric model, endowed with an intermediate scale, is generally
favoured, unless some fine tuning occurs in the supersymmetric case.


title: Phase Transition in Dense QCD with the Schwinger-Dyson Equation

abstract:
  We investigate the phase structure of dense QCD using the Schwinger-Dyson
equation (SDE) with the improved ladder approximation in the Landau gauge. We
use the gluon propagator with the electric mode corrected by Debye screening
and the magnetic mode corrected by Landau damping. We solve the coupled SDE for
the Majorana masses of the quark and antiquark (separately from the SDE for the
Dirac mass) in the low density and intermediate density regions. In the low
density region, both the SDEs for the Majorana masses and the Dirac mass have
nontrivial solutions that correspond to the color symmetry breaking (CSB)
vacuum and the chiral symmetry breaking ($\chi$SB) vacuum. Comparing the values
of the effective potential in the two vacua, we show that the phase transition
from the $\chi$SB vacuum to the CSB vacuum is of first order. The resultant
value of the critical chemical potential is about 210 MeV, which is smaller
than that obtained from the SDE analysis including only the Dirac mass. The
momentum dependences of the Majorana masses of the quark and antiquark are
shown to be quite different, although the masses are of the same order.


title: Limits on the Size of Extra Dimensions and the String Scale

abstract:
  We give a brief summary of present bounds on the size of possible
extra-dimensions as well as the string scale from collider experiments.


title:
Collective modes of color-flavor locked phase of dense QCD at finite
  temperature

abstract:
  A detailed analysis of collective modes that couple to either vector or axial
color currents in color-flavor locked phase of color superconducting dense
quark matter at finite temperature is presented. Among the realm of collective
modes, including the plasmons and the Nambu-Goldstone bosons, we also reveal
the gapless Carlson-Goldman modes, resembling the scalar Nambu-Golstone bosons.
These latter exist only in a close vicinity of the critical line. Their
presence does not eliminate the Meissner effect, proving that the system
remains in the color broken phase. The finite temperature properties of the
plasmons and the Nambu-Goldstone bosons are also studied. In addition to the
ordinary plasmon, we also reveal a "light" plasmon which has a narrow width and
whose mass is of the order of the superconducting gap.


title: On Neutrino Masses and a Low Breaking Scale of Left-Right Symmetry

abstract:
  In left-right symmetric models (LRSM) the light neutrino masses arise from
two sources: the seesaw mechanism and a VEV of an SU(2)$_L$ triplet. If the
left-right symmetry breaking, $v_R$, is low, $v_R\lsim15\TeV$, the
contributions to the light neutrino masses from both the seesaw mechanism and
the triplet Yukawa couplings are expected to be well above the experimental
bounds. We present a minimal LRSM with an additional U(1) symmetry in which the
masses induced by the two sources are below the eV scale and the two-fold
problem is solved. We further show that, if the U(1) symmetry is also
responsible for the lepton flavor structure, the model yields a small mixing
angle within the first two lepton generations.


title:
Global Analysis with SNO: Toward the Solution of the Solar Neutrino
  Problem

abstract:
  We perform a global analysis of the latest solar neutrino data including the
SNO result on the CC-event rate. This result further favors the LMA solution of
the solar neutrino problem. The best fit values of parameters we find are:
\Delta m^2 = (4.8 - 5.0)10^{-5} eV^2, tan^2 \theta = 0.35 - 0.38, f_B = 1.08 -
1.12, and f_{hep} = 1 - 4. With respect to this best fit the LOW solution is
accepted at 90% C.L.. The Vacuum oscillation solution with \Delta m^2 = 1.4
10^{-10} eV^2, gives good fit of the data provided that the boron neutrino flux
is substantially smaller than the SSM flux (f_B \sim 0.5). The SMA solution is
accepted only at 3\sigma level. We find that vacuum oscillations to sterile
neutrino, VAC(sterile), with f_B \sim 0.5 also give rather good global fit of
the data. All other sterile solutions are strongly disfavored. We check the
quality of the fit by constructing the pull-off diagrams of observables.
Predictions for the day-night asymmetry, spectrum distortion and NC/CC ratio at
SNO are calculated. In the best fit points of the global solutions we find:
A_{DN}^{CC} \approx (7 - 8)% for LMA, \sim 3% for LOW, and (2 - 3)% for SMA. It
will be difficult to see the distortion of the spectrum expected for LMA as
well as LOW solutions. However, future SNO spectral data can significantly
affect the VAC and SMA solutions. We also calculate expectations for the
BOREXINO rate.


title:
Spontaneous Symmetry Breaking with Abnormal Number of Nambu-Goldstone
  Bosons and Kaon Condensate

abstract:
  We describe a class of relativistic models incorporating finite density of
matter in which spontaneous breakdown of continuous symmetries leads to a
lesser number of Nambu-Goldstone bosons than that required by the Goldstone
theorem. This class, in particular, describes the dynamics of the kaon
condensate in the color-flavor locked phase of high density QCD. We describe
the spectrum of low energy excitations in this dynamics and show that, despite
the presence of a condensate and gapless excitations, this system is not a
superfluid.


title:
Single transverse-spin asymmetry in Drell-Yan lepton angular
  distribution

abstract:
  We calculate a single transverse-spin asymmetry for the Drell-Yan
lepton-pair's angular distribution in perturbative QCD. At leading order in the
strong coupling constant, the asymmetry is expressed in terms of a twist-3
quark-gluon correlation function T_F^{(V)}(x_1,x_2). In our calculation, the
same result was obtained in both light-cone and covariant gauge in QCD, while
keeping explicit electromagnetic current conservation for the virtual photon
that decays into the lepton pair. We also present a numerical estimate of the
asymmetry and compare the result to an existing other prediction.


title:
Dynamical renormalization group approach to the Altarelli-Parisi-Lipatov
  equations

abstract:
  The Altarelli-Parisi-Lipatov equations for the parton distribution functions
are rederived using the dynamical renormalization group approach to quantum
kinetics. This method systematically treats the ln Q^2 corrections that arises
in perturbation theory as a renormalization of the parton distribution function
and unambiguously indicates that the strong coupling must be allowed to run
with the scale in the evolution kernel. To leading logarithmic accuracy the
evolution equation is Markovian and the logarithmic divergences in the
perturbative expansion are identified with the secular divergences (terms that
grow in time) that emerge in a perturbative treatment of the kinetic equations
in nonequilibrium systems. The resummation of the leading logarithms by the
Altarelli-Parisi-Lipatov equation is thus similar to the resummation of the
leading secular terms by the Boltzmann kinetic equation.


title: Extra Long Baseline Neutrino Oscillations and CP Violation

abstract:
  The potential for studying CP violation in neutrino oscillations using
conventional neutrino and anti-neutrino beams is examined.


title: Update on neutrino mixing in the early Universe

abstract:
  From the current cosmological observations of CMB and nuclear abundances we
show, with an analytic procedure, that the total effective number of extra
neutrino species $\Delta N_{\nu}^{\rm tot}< 0.3$. We also describe the possible
signatures of non standard effects that could be revealed in future CMB
observations. This cosmological information is then applied to neutrino mixing
models. Taking into account the recent results from the SNO and SuperKamiokande
experiments, disfavouring pure active to sterile neutrino oscillations, we show
that all 4 neutrino mixing models, both of 2+2 and 3+1 type, lead to a full
thermalization of the sterile neutrino flavor. Moreover such a sterile neutrino
production excludes the possibility of an electron neutrino asymmetry
generation and we conclude that $\Delta N_{\nu}^{\rm tot}\simeq 1$, in
disagreement with the cosmological bound. This result is valid under the
assumption that the initial neutrino asymmetries are small. We suggest the
existence of a second sterile neutrino flavor, with mixing properties such to
generate a large electron neutrino asymmetry, as a possible way out.


title: Superheavy particles either for UHECR of for muon anomaly

abstract:
  We show that, according to the scheme of spontaneous breakings starting from
a GUT with symmetry E6, it is possible that either a superheavy particle
without ordinary interactions is source of ultra-high energy cosmic rays or a
not so heavy lepton mixes with muon explaining the recently observed
discrepancy of the anomalous magnetic moment of the latter.


title:
Neutrino Masses and $\mu \to e \gamma$ in the Generic Supersymmetric
  Standard Model

abstract:
  We summarized our report on neutrino masses and $\mu \to e \gamma$ in the
generic supersymmetric standard model, emphasizing on the much overlooked
scalar masses contributions from R-parity violation.


title:
Chromomagnetic Catalysis of Chiral Symmetry Breaking and Color
  Superconductivity

abstract:
  It is shown in the framework of an extended NJL model with two flavors that
some types of external chromomagnetic field induce the dynamical chiral or
color symmetry breaking even at weakest attraction between quarks. It is argued
also that an external chromomagnetic field, simulating the chromomagnetic gluon
condensate of the real QCD-vacuum, might significantly influence the color
superconductivity formation.


title:
Radiative decays of basic scalar, vector and tensor mesons and the
  determination of the P-wave q\bar q multiplet

abstract:
  We perform simultaneous calculations of the radiative decays of scalar mesons
f_0(980)-> \gamma\gamma, a_0(980)-> \gamma\gamma, vector meson \phi(1020)->
\gamma f_0(980), \gamma a_0(980), \gamma \pi^0, \gamma \eta, \gamma \eta' and
tensor mesons a_2(1320)-> \gamma\gamma, f_2(1270)-> \gamma\gamma, f_2(1525)->
\gamma\gamma assuming all these states to be dominantly the q\bar q ones. A
good description of the considered radiative decays is reached by using almost
the same radial wave functions for scalar and tensor mesons that supports the
idea for the f_0(980), a_0(980) and a_2(1320), f_2(1270), f_2(1525) to belong
to the same P -wave q\bar q multiplet.


title: Gluonic effects in eta'-nucleon interactions

abstract:
  We review the theory and phenomenology of the axial U(1) problem with
emphasis on the role of gluonic degrees of freedom in the low-energy pp -> pp
eta and pp -> pp eta' reactions.


title:
Quark-gluonium content of the scalar-isoscalar states f_0(980),
  f_0(1300), f_0(1500), f_0(1750), f_0(1420 ^{+150}_{- 70}) from hadronic
  decays

abstract:
  On the basis of the decay couplings f_0 -> \pi\pi, K\bar K, \eta\eta,
\eta\eta', which had been found before, in the study of analytical
(IJ^{PC}=00^{++})-amplitude in the mass range 450-1900 MeV, we analyse the
quark-gluonium content of resonances f_0(980), f_0(1300), f_0(1500), f_0(1750)
and the broad state f_0(1420 ^{+ 150}_{-70}). The K-matrix technique used in
the analysis makes it possible to evaluate the quark-gluonium content both for
the states with switched-off decay channels (bare states, f^{bare}_0) and the
real resonances. We observe significant change of the quark-gluonium
composition in the evolution from bare states to real resonances, that is due
to the mixing of states in the transitions f_0(m_1)-> real mesons-> f_0(m_2)
responsible for the decay processes as well. For the f_0(980), the analysis
confirmed the dominance of q\bar q component thus proving the n\bar n/s\bar s
composition found in the study of the radiative decays. For the mesons
f_0(1300), f_0(1500) and f_0(1750), the hadronic decays do not allow one to
determine uniquely the n\bar n, s\bar s and gluonium components providing
relative pecentage only. The analysis shows that the broad state f_0(1420 ^{+
150}_{-70}) can mix with the flavour singlet q\bar q component only, that is
consistent with gluonium origin of the broad resonance.