title: Density effects on the pion dispersion relation at finite temperature

abstract:
  We study the behavior of the pion dispersion relation in a pion medium at
finite density and temperature, introducing a chemical potential to describe
the finite pion number density. Such description is particularly important
during the hadronic phase of a relativistic heavy-ion collision, between
chemical and thermal freeze-out, where the pion number changing processes,
driven by the strong interaction, can be considered to be frozen. We make use
of an effective Lagrangian that explicitly respects chiral symmetry through the
enforcement of the chiral Ward identities. The pion dispersion relation is
computed through the computation of the pion self-energy in a non-perturbative
fashion by giving an approximate solution to the Schwinger-Dyson equation for
this self-energy. The dispersion relation is described in terms of a density
and temperature dependent mass and an index of refraction which is also
temperature, density as well as momentum dependent. The index of refraction is
larger than unity for all values of the momentum for finite \mu and T. Given
the strong coupling between \rho vectors and pions, we argue that the
modification of the pion mass due to finite pion density effects has to be
taken into account self-consistently for the description of the in-medium
modifications of \rho's.


title: Estimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t

abstract:
  We estimate B(K -> pi nu nubar) in the context of the Standard Model by
fitting for lambda_t = Vtd x V*ts of the `kaon unitarity triangle' relation. We
fit data from epsilon_K, the CP-violating parameter describing K-mixing, and
a_{psi K}, the CP-violating asymmetry in B -> J/psi K decays. Our estimate is
independent of the CKM matrix element Vcb and of the ratio of Bs to Bd mixing
frequencies. The measured value of B(K+ -> pi+ nu nubar) can be compared both
to this estimate and to predictions made from the ratio of B mixing
frequencies.


title: Electroproduction of Charmonia off Protons and Nuclei

abstract:
  Elastic virtual photoproduction of charmonia on nucleons is calculated in a
parameter free way with the light-cone dipole formalism and the same input:
factorization in impact parameters, light-cone wave functions for the photons
and the charmonia, and the universal phenomenological dipole cross section
which is fitted to other data. The charmonium wave functions are calculated
with four known realistic potentials, and two models for the dipole cross
section are tested. Very good agreement with data for the cross section of
charmonium electroproduction is found in a wide range of $s$ and $Q^2$. Using
the ingredients from those calculations we calculate also exclusive
electroproduction of charmonia off nuclei. Here new effects become important,
(i) color filtering of the $c\bar c$ pair on its trajectory through nuclear
matter, (ii) dependence on the finite lifetime of the $c\bar c$ fluctuation
(coherence length) and (iii) gluon shadowing in a nucleus compared to the one
in a nucleon. Total coherent and incoherent cross sections for C, Cu and Pb as
functions of $s$ are presented. The results can be tested with future
electron-nucleus colliders or in the peripheral collisions of relativistic
heavy ions.


title: pi-pi scattering: theory is ahead of experiment

abstract:
  I draw attention to a recent breakthrough in the field of low energy pion
physics: the consequences of the hidden symmetry of the QCD Hamiltonian have
successfully been incorporated in the general dispersive framework for the
pi-pi scattering amplitude, which is due to Roy. The meagre experimental
information about the imaginary parts at and above 0.8 GeV suffices to
unambiguously and accurately pin down the scattering amplitude at lower
energies. The recent Brookhaven data on the reaction K -> pi pi e nu provide a
significant test of the theory. They imply that the Gell-Mann-Oakes-Renner
relation is approximately valid -- the bulk of the pion mass indeed originates
in the quark condensate.


title: Electromagnetic form factor of the pion

abstract:
  The Standard Model prediction for the magnetic moment of the muon requires a
determination of the electromagnetic form factor of the pion at high precision.
It is shown that the recent progress in pi-pi scattering allows us to obtain an
accurate representation of this form factor on the basis of the data on e+e- ->
pi+ pi-. The same method also applies to the form factor of the weak vector
current, where the data on the decay tau -> pi- pi0 nu are relevant.
Unfortunately, however, the known sources of isospin breaking do not explain
the difference between the two results. The discrepancy implies that the
Standard Model prediction for the magnetic moment of the muon is currently
subject to a large uncertainty. Talk given in May 2002, in honor of Arkady
Vainshtein.


title: Strong Interactions at Low Energy

abstract:
  The lectures review some of the basic concepts relevant for an understanding
of the low energy properties of the strong interactions: chiral symmetry,
spontaneous symmetry breakdown, Goldstone bosons, quark condensate. The
effective field theory used to analyze the low energy structure is briefly
sketched. As an illustration, I discuss the implications of the recent data on
the decay $K\to \pi\pi e\nu$ for the magnitude of the quark condensate.


title: Neutrinos from Supernovae

abstract:
  In this review, the effect of flavor oscillations on the neutrinos released
during supernova explosion after core collapse is described. In some scenarios
there are large enhancement of the number of events compared to the no
oscillation case. Various other features associated with supernova neutrinos
are also discussed.


title: Higgs Physics with a Universal Higgs-Fermion Coupling

abstract:
  A variant of the conventional Higgs model is proposed which separates the
physics of the Higgs decay modes from the problem of fermion mass generation.
The lowest mass Higgs boson has no significant bottom decay mode but a charm
and up branching ratio of about 33% each and requires the existence of two
Higgs doublets of type II, which is consistent with supersymmetric models. It
also implies there are probably no photon or gluon decay modes of any Higgs
boson.


title: Delta baryons in the separation geometry model

abstract:
  Extension of the separation geometry model of baryon structure from
physics/0109024 and hep-ph/0201270 to the spin 2/3 Delta baryons. Theoretically
derived masses in Mev; $\Delta^{++}=1240.0, \Delta^-=1243.4, \Delta^0=1233.9,
\Delta^+=1232.6$. The first value differs considerably from the empirical
value. Mass difference values are discussed.


title: Calculation of the quark condensate through Schwinger-Dyson equation

abstract:
  In this letter, we clarify the algebra expression for calculating the quark
condensate based on the non-perturbative quark propagator calculated through
Schwinger-Dyson equation. The quark condensates, which characterize the low
energy QCD vacuum, should not get a divergent quantity at large energy scale;
the re-normalization group evolution behaviour at large energy scale therefore
should be interpreted as "smeared collective effects" for it contains both
perturbative and non-perturbative parts.
  We prefer the integral expression and get a quantity which is both convergent
and scale dependent.


title: Some topics in heavy-quark physics

abstract:
  Some topics which can be easily explained to undergraduate students are
presented, with elementary derivations. For a more systematic treatment of
heavy-quark physics, see the textbook by Manohar and Wise.


title: Inflationary Cosmology with Five Dimensional SO(10)

abstract:
  We discuss inflationary cosmology in a five dimensional SO(10) model
compactified on $S^1/(Z_2\times Z_2')$, which yields $SU(3)_c\times
SU(2)_L\times U(1)_Y\times U(1)_X$ below the compactification scale. The gauge
symmetry $SU(5)\times U(1)_X$ is preserved on one of the fixed points, while
``flipped'' $SU(5)'\times U(1)'_X$ is on the other fixed point. Inflation is
associated with $U(1)_X$ breaking, and is implemented through $F$-term scalar
potentials on the two fixed points. A brane-localized Einstein-Hilbert term
allows both branes to have positive tensions during inflation. The scale of
$U(1)_X$ breaking is fixed from $\delta T/T$ measurements to be around
$10^{16}$ GeV, and the scalar spectral index $n=0.98-0.99$. The inflaton field
decays into right-handed neutrinos whose subsequent out of equilibrium decay
yield the observed baryon asymmetry via leptogenesis.


title: Stable Neutral Fermi Ball

abstract:
  Fermi Ball is a kind of nontopological soliton with fermions trapped in its
domain wall, and is suggested to arises from the spontaneous symmetry breaking
of the approximate $Z_2$ symmetry in the early universe. We find that the
neutral thin-wall Fermi Ball is stable in the limited region of the scalar
self-coupling constant $\lambda$ and the Yukawa coupling constant $G$. We find
that the Fermi Ball is stabilized due to the curvature effect of the domain
wall caused by the fermion sector. We also discuss whether such stable Fermi
Balls may contribute to the cold dark matter.


title:
CP Violating Rate Difference Relations for $B\to PP$ and $B \to PV$ in
  Broken SU(3)

abstract:
  Within the standard model there exist certain relations between CP violating
rate differences in B decays in the SU(3) limit. We study SU(3) breaking
corrections to these relations in the case of charmless, hadronic, two body $B$
decays using the improved factorization model of Ref.\cite{3}. We consider the
cases $B \to PP$ and $B \to PV$ for both $B_d$ and $B_s$ mesons. We present an
estimate for $A_{CP}(\pi^- \pi^+)$ in terms of $A_{CP}(K^- \pi^+)$.


title: On A Classification of Mesons

abstract:
  We give a mass formula for computing the mass spectrum of mesons. By this
formula we show that there are many mesons with their masses corresponding to a
prime number. In particular we show that all strange mesons are with their
masses corresponding to a prime number. With these prime numbers indexing the
mesons we give a classification of mesons. We set up a knot model of mesons to
derive this mass formula. In this knot model mesons and their anti-particles
are modeled by knots and their mirror images respectively. Then the amphichiral
knots which are equivalent to their mirror images are used to model mesons
which are identical with their anti-particles. With this knot model we show
that there is a periodic phenomenon in the classification of mesons such that
the starting nonet and the ending nonet are nonets of pseudoscalar mesons with
the $\pi$ meson modeled by an amphichiral knot. From this periodic phenomenon
we give a theoretical argument for the existence of charm-anticharm mesons.


title: Strangeness Saturation: Energy- and System-Size Dependence

abstract:
  Relativistic heavy-ion collisions lead to a final state which has a higher
degree of strangeness saturation than those of elementary collisions. A
systematic analysis of this phenomenon, based on the strangeness saturation
factor, is made for C+C, Si+Si and Pb+Pb collisions at the CERN SPS collider
and for Au+Au collisions at RHIC energies. Strangeness saturation is shown to
increase with the number of participants within a colliding system, at both
CERN SPS and RHIC energies. The saturation observed in central collisions of
lighter nuclei deviates from that seen in peripheral collisions of heavier
nuclei with an equivalent participant number, which could be due to the
difference in nuclear density.


title: $B-\pi$ weak form factor with chiral current in the light-cone sum rules

abstract:
  In this article, we calculate the $B\to \pi$ transition form factor
$f^{+}_{B\pi}(q^2)$ by including perturbative $O(\alpha_s)$ corrections to the
twist-2 terms with chiral current in the light-cone QCD sum rule approach. The
corrections to the product $f_Bf^{+}_{B\pi}(q^2)$ in the leading twist
approximation is found to be about 30%, while a similar magnitude corresponding
to $O(\alpha_s)$ corrections for $f_B(q^2)$ in the two-point sum rule cancel
them and result in small net corrections for $f^{+}_{B\pi}(q^2)$. Our results
confirm the observations made in previous light-cone QCD sum rule studies.


title:
Evidence of Non-Zero Mass Features for the Neutrinos Emitted at
  Supernova LMC-'87A

abstract:
  The observation of the neutrinos arrived from Supernova LMC-'87A shows, with
a good confidence level, the existence of two massive neutrinos. For the
unobserved third neutrino mass, could speculate two possibilities either that
this mass is close to one of the two observed values or that this kind of
neutrino has a negligible electronic flavor component.


title: Neutral Higgs H^0 \to h^0 (A^0) l_i^- l_j^+ decay

abstract:
  We study the lepton flavor violating H^0 \to h^0 (A^0) l_i^- l_j^+ and the
lepton flavor conserving H^0 \to h^0 (A^0) l_i^- l_i^+ (l_i=\tau, l_j=\mu)
decays in the framework of the general two Higgs doublet model, the so-called
model III. We estimate the decay width of LFV (LFC) process at the order of
magnitude of 10^{-5} GeV$ (10^{-4} GeV), for m_{H^0}= 150 GeV, and the
intermediate values of the coupling \bar{\xi}^{E}_{N,\tau \mu}\sim 5 GeV
(\bar{\xi}^{E}_{N,\tau \tau}\sim 30 GeV). The experimental result of the
process under consideration can ensure comprehensive information about the
standard model Higgs boson $H^0$ and the model III free parameters.


title: Stabilizing the Axion by Discrete Gauge Symmetries

abstract:
  The axion solution to the strong CP problem makes use of a global
Peccei-Quinn U(1) symmetry which is susceptible to violations from quantum
gravitational effects. We show how discrete gauge symmetries can protect the
axion from such violations. PQ symmetry emerges as an approximate global
symmetry from discrete gauge symmetries. Simple models based on Z_N symmetries
with N =11,12, etc are presented realizing the DFSZ axion and the KSVZ axion.
The discrete gauge anomalies are cancelled by a discrete version of the
Green-Schwarz mechanism. In the supersymmetric extension our models provide a
natural link between the SUSY breaking scale, the axion scale, and the
SUSY-preserving \mu term.


title: Extensive Air Showers and Accelerator Data - The NEEDS Workshop

abstract:
  Very high energy cosmic rays are typically studied by measuring extensive air
showers formed by secondary particles produced in collisions with air nuclei.
The indirect character of the measurement makes the physics interpretation of
cosmic ray data strongly dependent on simulations of multiparticle production
in showers. In April 2002 about 50 physicists met in Karlsruhe to discuss
various aspects of hadronic multiparticle production with the aim of
intensifying the interaction between high energy physics and cosmic ray groups.
Current and upcoming possibilities at accelerators for measuring features of
hadronic interactions of relevance to air showers were the focus of the
workshop. This article is a review of the discussions and conclusions.


title: Removing Ambiguities in the Neutrino Mass Matrix

abstract:
  We suggest that the weak-basis independent condition det(M_nu)=0 for the
effective neutrino mass matrix can be used in order to remove the ambiguities
in the reconstruction of the neutrino mass matrix from input data available
from present and future feasible experiments. In this framework, we study the
full reconstruction of M_nu with special emphasis on the correlation between
the Majorana CP-violating phase and the various mixing angles. The impact of
the recent KamLAND results on the effective neutrino mass parameter is also
briefly discussed.


title: Production of Black Holes in TeV-Scale Gravity

abstract:
  Copious production of microscopic black holes is one of the least
model-dependent predictions of TeV-scale gravity scenarios. We review the
arguments behind this assertion and discuss opportunities to track the striking
associated signatures in the near future. These include searches at neutrino
telescopes, such as AMANDA and RICE, at cosmic ray air shower facilities, such
as the Pierre Auger Observatory, and at colliders, such as the Large Hadron
Collider.


title: Interjet Energy Flow/Event Shape Correlations

abstract:
  We identify a class of perturbatively computable measures of interjet energy
flow, which can be associated with well-defined color flow at short distances.
As an illustration, we calculate correlations between event shapes and the flow
of energy, Q_Omega, into an interjet angular region, Omega, in high-energy
two-jet e^+e^- -annihilation events. Laplace transforms with respect to the
event shapes suppress states with radiation at intermediate energy scales, so
that we may compute systematically logarithms of interjet energy flow. This
method provides a set of predictions on energy radiated between jets, as a
function of event shape and of the choice of the region Omega in which the
energy is measured. Non-global logarithms appear as corrections. We apply our
method to a continuous class of event shapes.


title:
Comparison of relativistic bound-state calculations in Front-Form and
  Instant-Form Dynamics

abstract:
  Using the Wick-Cutkosky model and an extended version (massive exchange) of
it, we have calculated the bound states in a quantum field theoretical
approach. In the light-front formalism we have calculated the bound-state mass
spectrum and wave functions. Using the Terent'ev transformation we can write
down an approximation for the angular dependence of the wave function. After
calculating the bound-state spectra we characterized all states found.
Similarly, we have calculated the bound-state spectrum and wave functions in
the instant-form formalism. We compare the spectra found in both forms of
dynamics in the ladder approximation and show that in both forms of dynamics
the O(4) symmetry is broken.


title:
Calculation of Temperature-Dependent Hadronic Correlation Functions of
  Pseudoscalar and Vector Currents

abstract:
  We make use of the Nambu-Jona-Lasinio (NJL) formalism and real-time
finite-temperature field theory to calculate hadronic current correlation
functions in the deconfined phase of quantum chromodynamics (QCD). We consider
both pseudoscalar and vector currents and compare our results with those
obtained in lattice simulations of QCD. Our results are similar to those
obtained in the lattice simulations for $T=1.5 T_c$, where $T_c$ is the
temperature of the confinement-deconfinement transition. For $T=3.0 T_c$ our
results do not exhibit the resonances obtained from the lattice simulations.
However, the errors presented for the lattice results are large and it is
possible that our results at $T=3.0 T_c$ are consistent with the lattice
results when these errors are taken into account. Since the method used in the
lattice analysis to obtain the spectral functions requires assumptions about
the likelihood of a particular form for the spectral function, we believe our
calculations will be useful to researchers who wish to calculate hadronic
current correlation functions at finite temperature using lattice-based
methods. Our model makes use of temperature-dependent coupling constants for
the NJL model. We present an argument that such temperature dependence is
necessary, if the results of the model are to be consistent with what is known
concerning QCD thermodynamics.


title:
Next-to-next-to-leading order prediction for the photon-to-pion
  transition form factor

abstract:
  We evaluate the next-to-next-to-leading order corrections to the
hard-scattering amplitude of the photon-to-pion transition form factor. Our
approach is based on the predictive power of the conformal operator product
expansion, which is valid for a vanishing $\beta$-function in the so-called
conformal scheme. The Wilson--coefficients appearing in the non-forward
kinematics are then entirely determined from those of the polarized
deep-inelastic scattering known to next-to-next-to-leading accuracy. We propose
different schemes to include explicitly also the conformal symmetry breaking
term proportional to the $\beta$-function, and discuss numerical predictions
calculated in different kinematical regions. It is demonstrated that the
photon-to-pion transition form factor can provide a fundamental testing ground
for our QCD understanding of exclusive reactions.


title:
Electromagnetic form factors of the baryon octet in the perturbative
  chiral quark model

abstract:
  We apply the perturbative chiral quark model at one loop to analyze the
electromagnetic form factors of the baryon octet. The analytic expressions for
baryon form factors, which are given in terms of fundamental parameters of
low-energy pion-nucleon physics (weak pion decay constant, axial nucleon
coupling, strong pion-nucleon form factor), and the numerical results for
baryon magnetic moments, charge and magnetic radii are presented. Our results
are in good agreement with experimental data.


title: Unification in 5D SO(10)

abstract:
  Gauge unification in a five dimensional supersymmetric SO(10) model
compactified on an orbifold $S^1/(Z_2 \times Z_2^{\prime})$ is studied. One
orbifolding reduces N=2 supersymmetry to N=1, and the other breaks SO(10) to
the Pati-Salam gauge group $\ps$. Further breaking to the standard model gauge
group is made through the Higgs mechanism on one of the branes. The differences
of the three gauge couplings run logarithmically even in five dimensions and we
can keep the predictability for unification as in four dimensional gauge
theories. We obtain an excellent prediction for gauge coupling unification with
a cutoff scale $M_* \sim 3 \times 10^{17}$ GeV and a compactification scale
$M_c \sim 1.5 \times 10^{14}$ GeV. Finally, although proton decay due to
dimension 5 operators may be completely eliminated, the proton decay rate in
these models is sensitive to the placement of matter multiplets in the 5th
dimension, as well as to the unknown physics above the cutoff scale.


title:
Diffractive Hadroproduction of Dijets and W's at the Tevatron Collider
  and the Pomeron Structure Function

abstract:
  Results from a phenomenological analysis of dijet and W hard diffractive
hadroproduction at Fermilab Tevatron energies are reported. The theoretical
framework employed here is a modified version of the Ingelman-Schlein approach
which includes DGLAP-evolved structure functions. Different from what has been
achieved by the DESY ep HERA reactions, a reasonable overall description of
such diffractive hadron processes is obtained only when a complex, quark-rich
Pomeron structure function is employed in the calculation.


title: Finite Theories and the SUSY Flavor Problem

abstract:
  We study a finite SU(5) grand unified model based on the non-Abelian discrete
symmetry A_4. This model leads to the democratic structure of the mass matrices
for the quarks and leptons. In the soft supersymmetry breaking sector, the
scalar trilinear couplings are aligned and the soft scalar masses are
degenerate, thus solving the SUSY flavor problem.


title: Perturbative QCD Analysis of the Nucleon's Pauli Form Factor F_2(Q^2)

abstract:
  We perform a perturbative QCD analysis of the nucleon's Pauli form factor
$F_2(Q^2)$ in the asymptotically large $Q^2$ limit. We find that the leading
contribution to $F_2(Q^2)$ has a $1/Q^6$ power behavior, consistent with the
well-known result in the literature. Its coefficient depends on the leading-
and subleading-twist light-cone wave functions of the nucleon, the latter
describing the quarks with one unit of orbital angular momentum. We also derive
at the logarithmic accurary the asymptotic scaling $F_2(Q^2)/F_1(Q^2) \sim
(\log^2 Q^2/\Lambda^2)/Q^2$ which describes recent Jefferson Lab data well.


title:
Exclusive Double-Charmonium Production from e^+ e^- Annihilation into
  Two Virtual Photons

abstract:
  We calculate the contributions from QED processes involving two virtual
photons to the cross sections for e^+ e^- annihilation into two charmonium
states with the same C-parity. Generically, the cross sections are three orders
of magnitude smaller than those for charmonia with opposite C-parity because
they are suppressed by a factor of alpha^2/alpha_s^2. However, if both
charmonia have quantum numbers J^{PC} = 1^{--}, then there is a contribution to
the cross section that involves the fragmentation of each photon into a
charmonium. The fragmentation contribution is enhanced by powers of
E_{beam}/m_c, the ratio of the beam energy to the charm-quark mass, and this
enhancement can compensate for the suppression factor that is associated with
the coupling constants. In particular, the predicted cross section for J/psi +
J/psi at the B factories is larger than that for J/psi + eta_c.


title: Lorentz Violation and Spacetime Supersymmetry

abstract:
  Supersymmetry and Lorentz invariance are closely related as both are
spacetime symmetries. Terms can be added to Lagrangians that explicitly break
either supersymmetry or Lorentz invariance. It is possible to include terms
which violate Lorentz invariance but maintain invariance under supersymmetric
transformations. I illustrate this with some simple extensions of the original
Wess-Zumino model.


title:
Softening of SUSY flavor problem from asymptotically free bulk
  interactions

abstract:
  Recently, it was pointed out that soft masses of the supersymmetric gauge
theories with extra dimensions tends to a flavor conserving point, which is a
desirable scenario in gravity mediation models. We point out that in 6D we must
consider the anomaly free condition in addition to the condition on the
asymptotic freedom. From this, we find $E_6$, $E_7$ and $E_8$ are natural
candidates in 6D. There is no SU(N) model, but there exist two SO(10) models
and SO(2n) models(one each for each $n\ge 6$) satisfying these conditions. In 5
dimensions, there is no such condition on anomaly freedom, but the softening
may not be enough.


title:
Exact Calculation of Ring Diagrams and the Off-shell Effect on the
  Equation of State

abstract:
  The partition function with ring diagrams at finite temperature is exactly
caluclated by using contour integrals in the complex energy plane. It contains
a pole part with temperature and momentum dependent mass and a phase shift part
induced by off-shell effect in hot medium. The thermodynamic potentials for
$\phi^4$ and $\phi^3$ interactions are calculated and compared with the
quasi-particle (pole) approximation. It is found that the off-shell effect on
the equation of state is remarkable.


title:
Light-flavor sea-quark distributions in the nucleon in the SU(3) chiral
  quark soliton model (II) -- theoretical formalism --

abstract:
  The path integral formulation is given to obtain quark and antiquark
distribution functions in the nucleon within the flavor SU(3) version of the
chiral quark soliton model. The basic model action is a straightforward
generalization of the corresponding SU(2) one, except for one distinguishable
feature, i.e. the presence of the SU(3) symmetry breaking term arising from the
sizably large mass difference $\Delta m_s$ between the strange and nonstrange
quarks. We treat this SU(3) symmetry breaking effect by relying upon the first
order perturbation theory in the mass parameter $\Delta m_s$. We also address
to the problem of ordering ambiguity of the relevant collective space
operators, which arises in the evaluation of the parton distribution functions
at the subleading order of $1/N_c$ expansion.


title: Instanton Corrections to Quark Form Factor at Large Momentum Transfer

abstract:
  Within the Wilson integral formalism, we discuss the structure of
nonperturbative corrections to the quark form factor at large momentum transfer
analyzing the infrared renormalon and instanton effects. We show that the
nonperturbative effects determine the initial value for the perturbative
evolution of the quark form factor and attribute their general structure to the
renormalon ambiguities of the perturbative series. It is demonstrated that the
instanton contributions result in the finite renormalization of the
next-to-leading perturbative result and numerically are characterized by a
small factor reflecting the diluteness of the QCD vacuum within the instanton
liquid model.


title:
Spectroscopy of Baryons Containing Two Heavy Quarks in Nonperturbative
  Quark Dynamics

abstract:
  We have studied the three quark systems in an Effective Hamiltonian approach
in QCD. With only two parameters: the string tension sigma and the strong
coupling constant alpha_s we obtain a good description of the ground state
light and heavy baryons. The prediction of masses of the doubly heavy baryons
not discovered yet are also given. In particular, a mass of 3620 MeV for the
lightest (ccu) baryon is found by employing the hyperspherical formalism to the
three quark confining potential with the string junction.


title: Scaling in Numerical Simulations of Domain Walls

abstract:
  We study the evolution of domain wall networks appearing after phase
transitions in the early Universe. They exhibit interesting dynamical scaling
behaviour which is not yet well understood, and are also simple models for the
more phenomenologically acceptable string networks. We have run numerical
simulations in two- and three-dimensional lattices of sizes up to 4096^3. The
theoretically predicted scaling solution for the wall area density A ~ 1/t is
supported by the simulation results, while no evidence of a logarithmic
correction reported in previous studies could be found. The energy loss
mechanism appears to be direct radiation, rather than the formation and
collapse of closed loops or spheres. We discuss the implications for the
evolution of string networks.


title: Radiative B Decays: Standard Candles of Flavor Physics

abstract:
  Rare radiative decays based on b->s+gamma transitions are among the most
prominent examples of flavor-changing neutral current processes. They benefit
from good theoretical control and experimental accessibility, large sensitivity
to physics beyond the Standard Model, and the availability of many observables.
In this talk I summarize the status of the theoretical understanding of these
decays and review how they may be used to constrain extensions of the Standard
Model, with particular focus on supersymmetric models.


title: Comments on the Quark Content of the Scalar Meson $f_0(1370)$

abstract:
  Based on the measurements of $(D_s^+,D^+)\to f_0(1370)\pi^+$ we determine, in
a model independent way, the allowed $s\bar s$ content in the scalar meson
$f_0(1370)$. We find that, on the one hand, if this isoscalar resonance is a
pure $n\bar n$ state [ $n\bar n\equiv(u\bar u+d\bar d)/\sqrt{2} ]$, a very
large $W$-annihilation term will be needed to accommodate $D_s^+\to
f_0(1370)\pi^+$. On the other hand, the $s\bar s$ component of $f_0(1370)$
should be small enough to avoid excessive $D_s^+\to f_0(1370)\pi^+$ induced
from the external $W$-emission. Measurement of $f_0(1370)$ production in the
decay $D_s^+\to K^+K^-\pi^+$ will be useful to test the above picture. For the
decay $D^0\to f_0(1370)\bar K^0$ which is kinematically barely or even not
allowed, depending on the mass of $f_0(1370)$, we find that the finite width
effect of $f_0(1370)$ plays a crucial role on the resonant three-body decay
$D^0\to f_0(1370)\bar K^0\to\pi^+\pi^-\bar K^0$.


title:
Chiral Phase Transitions in QED at Finite Temperature: Dyson-Schwinger
  Equation Analysis in the Real Time Hard-Thermal-Loop Approximation

abstract:
  In order for clarifying what are the essential thermal effects that govern
the chiral phase transition at finite temperature, we investigate, in the
real-time thermal QED, the consequences of the Hard-Thermal-Loop (HTL) resummed
Dyson-Schwinger equation for the physical fermion mass function $\Sigma_R$.
Since $\Sigma_R$ is the mass function of an ``unstable'' quasi-particle in
thermal field theories, it necessarily has non-trivial imaginary parts together
with non-trivial wave function renormalization constants. In the present
analysis we correctly respect this fact, and study, in the ladder
approximation, the effect of HTL resummed gauge boson propagator. Our results
with the use of numerical analysis, show the two facts; i) The chiral phase
transition is of second order, since the fermion mass is dynamically generated
at a critical value of the temperature $T_c$, or at the critical coupling
constant $\alpha_c$, without any discontinuity, and ii) the critical
temperature $T_c$ at fixed value of $\alpha$ is significantly lower than the
previous results, namely the restoration of chiral symmetry occurs at lower
temperature than previously expected. The second fact shows the importance of
correctly taking the essential thermal effect into the analysis of chiral phase
transition, which are, in the previous analyses, neglected due to the
inappropriate approximations. The procedure how to maximally respect the gauge
invariance in the present approximation, is also discussed.


title: Radiative Leptonic Decays of D_s^\pm and D^\pm Mesons

abstract:
  In this work, we investigate the radiative leptonic decays D_(s)^- \to \gamma
\ell \bar\nu (\ell = e, \mu) at tree level within the non-relativistic
consistuent quark model and the effective Lagrangian for the heavy flavor
decays. We find that the contributions for the three Feynman diagrams are all
important. With the full calculation, the decay branching ratios are of the
order of 10^-5 for D_s^- \to \gamma \ell \bar\nu and 10^-6 for D^- \to \gamma
\ell \bar\nu, respectively. These decays can be measured at B factories and
future CLEO-C experiments to determine the decay constants f_D_s and f_D.


title: Hadron Multiplicity in Lepton-Nucleon Interactions

abstract:
  Multi-hadron production in inelastic neutrino-nucleon interactions is
investigated within the framework of the quark-gluon string model. The
contributions of the planar (one-Reggeon exchange) and cylindrical (one-Pomeron
exchange) graphs to different observables is computed using a Monte Carlo
program for the generation of hadrons produced from the decay of colorless
quark-antiquark strings. The suggested approach results in a satisfactory
description of the experimental data on $\nu(\bar\nu) N\to\mu^-(\mu^+) h X$
reactions obtained recently at CERN by the NOMAD Collaboration. The data
extends over a wide range of initial neutrino energies $E_\nu$ $<$ 200 GeV/c
and momentum transfers 1 $<$ Q $<$ 7 GeV/c, well into the region where
perturbative QCD calculations are not applicable.


title: The role of topologigal defects in cosmology

abstract:
  Topological defects are involved in a plethora of physical and astrophysical
phenomena. In these lectures, I will review the r\^ ole they could play in the
large-scale structure formation and the anisotropies of the cosmic microwave
background, as well as in various high energy phenomena, including baryon
number asymmetry, ultra-high energy cosmic rays, and gamma ray bursts. I will
then summarize the gravitational effects of cosmic strings. Finally, I will
briefly discuss the r\^ ole of topological defects in brane world cosmology.


title:
Charmed Hadron Production in Polarized pp Reactions as a Probe of
  Polarized Gluons in the Proton

abstract:
  To probe the behavior of polarized gluons in the proton, we propose the
charmed hadron, such as Lambda_c and D^*, production in the forthcoming RHIC
experiments. We found that the spin correlation between the target proton and
the produced Lambda_c baryon might be a good signal for testing models of the
polarized gluon distribution in the proton.


title:
The renormalization of the effective gauge theory with spontaneous
  symmetry breaking: the $SU(2)\times U(1)$ case

abstract:
  We formulate the electroweak chiral Lagrangian in its mass eigenstates, and
study the its one-loop renormalization and provide its renormalization group
equations to the same order, so as to complete it as the low energy effective
theory of the standard model below a few TeV. In order to make our computation
consistent, we have provided a modified power counting rule to estimate the
contributions of higher loop and higher operators. As one of the application of
its renormalization group equations, we analyze the solution to the effects of
the Higgs scalar. We find that similar to the SU(2) case, that the triple
anomalous couplings are sensitive to the quartic couplings (here $\al_5$).
While the quadratic anomalous couplings are not sensitive, due to the large
leading contributions and the accidental cancellation. The differences in the
triple anomalous couplings between the direct method and renormalization group
equation method are well within the detection power of the LHC and LC, if the
Higgs scalar is not too heavy (say, 300 or 400 GeV). We also suggest a new
mechanism to generate the negative $S$ parameter through the radiative
corrections of the anomalous couplings. Comparison of the renormalization group
equation method and direct methods is provided in the full theory, the standard
model, to reveal the basic differences of them. The problem of the unitarity
violation is also addressed for our assumption in the modified power counting
rule.


title: Spread theory of the special theory of relativity

abstract:
  The transformation of space-time $x_{\mu}$ and ${x_{\mu}}^{\prime}$ in the
two inertial reference frames $\sum$ and
  ${\sum}^{\prime}$ in which their relative velocity is less than light speed,
and the relation of a particle mass $m$ with its movement velocity
  $v$ and so on are expatiated by Einstein's special theory of relativity.
  In this paper, we set forth a new transformation of space-time $x_{\mu}$ and
${x_{\mu}}^{\prime}$ in two inertial reference frames in which their relative
velocity is equal to or more than light speed, the new relation of a particle
mass $m$ and energy $E$ with its velocity $v$ $(v \geq c)$, the new mass-energy
equation and the new dynamics equation of a particle.


title: Cross Sections of Various Processes in Pbar P-Interactions

abstract:
  Problem of description of total cross sections of $\bar pp$- and
$pp$-interactions is considered within the framework of the Regge theory.
Parameters of the pomeron exchange, ordinary meson exchange and exotic meson
exchange with hidden baryon number are determined at fitting of experimental
data assuming the identical interaction radii of the reggeons with nucleon. An
expression is proposed for cross sections of various reactions in the $\bar
pp$-interactions - cross sections of one and two string creations needed for
Monte Carlo simulation of the reactions, and the cross sections are calculated.


title: High twists and the NNLO QCD corrections in DIS

abstract:
  We discuss interplay between the high-twist (HT) terms in the
operator-product expansion and the next-to-next-to-leading-order (NNLO) QCD
corrections to the deep-inelastic-scattering structure functions in analysis of
the high-precision data for charged leptons. Under account of the NNLO
corrections the observed HT terms change within their experimental errors only
and do not vanish in the NNLO.


title: Field theory description of vacuum replicas

abstract:
  In this paper we develop a systematic quantum field theory based approach to
the vacuum replica recently found to exist in effective low energy models in
hadronic physics. A local operator creating the replica state is constructed
explicitly. We show that a new effective quark-quark force arises in result of
replica existence. Phenomenological implications of such a force are also
briefly discussed.


title:
Genuine twist-3 contributions to the generalized parton distributions
  from instantons

abstract:
  The genuine twist-3 quark-gluon contributions to the Generalized Parton
Distributions (GPDs) are estimated in the model of the instanton vacuum. These
twist-3 effects are found to be parametrically suppressed relative to the
``kinematical'' twist-3 ones due to the small packing fraction of the instanton
vacuum. We derive exact sum rules for the twist-3 GPDs.


title:
B to light meson transition form factors calculated in perturbative QCD
  approach

abstract:
  We calculate the $B\to P$, $B\to V$ (P: light pseudoscalar meson, V light
vector meson) form factors in the large-recoil limit in perturbative QCD
approach, including both the vector (axial vector) and tensor operators. In
general there are two leading components $\phi_B$ and $\bar{\phi}_B$ for $B$
meson wave functions. We consider both contributions of them. Sudakov effects
($k_{\perp}$ and threshold resummation) are included to regulate the soft
end-point singularity. By choosing the hard scale as the maximum virtualities
of internal particles in the hard $b$-quark decay amplitudes, Sudakov factors
can effectively suppress the long-distance soft contribution. Hard contribution
can be dominant in these approaches.


title: Excited Baryon Production and Decays

abstract:
  We consider decays of the lowest-lying positive parity 56-plet and negative
parity bf 70-plet excited baryons. For the 70-plet, we include both
single-quark and two-quark decay operators, and find, somewhat mysteriously,
that the two-quark operators are not phenomenologically important. Studies of
decays 70-plet to Delta(1232) + photon may strengthen or vitiate this
observation. For the 56-plet decays, now using only the single-quark operator,
we can predict many strong decays after fitting parameters on the assumption
that the Roper is a 3q state. Comparison of these predictions to experiment can
verify the structure of the 56-plet. As a sidelight, we show a large N_c
derivation of the old Gursey-Radicati mass formula.


title: Symmetric Textures in SO(10) and LMA Solution for Solar Neutrinos

abstract:
  We analyze a model based on SUSY SO(10) combined with SU(2) family symmetry
and symmetric mass matrices constructed by the authors recently. Previously,
only the parameter space for the LOW and vacuum oscillation (VO) solutions was
investigated. We indicate in this note the parameter space which leads to large
mixing angle (LMA) solution to the solar neutrino problem with a slightly
modified effective neutrino mass matrix. The symmetric mass textures arising
from the left-right symmetry breaking and the SU(2) symmetry breaking give rise
to very good predictions for the quark and lepton masses and mixing angles. The
prediction of our model for the |U_{e\nu_{3}}| element in the
Maki-Nakagawa-Sakata (MNS) matrix is close to the sensitivity of current
experiments; thus the validity of our model can be tested in the near future.
We also investigate the correlation between the |U_{e\nu_{3}}| element and
\tan^{2}\theta_{\odot} in a general two-zero neutrino mass texture.


title: Interplay of Hard and Soft Processes at JLab Energies

abstract:
  Even at moderate energy machines, there is a regime where hard pion
electroproduction proceeds by a perturbatively calculable process. The process,
we claim, is not the leading twist fragmentation one but rather a higher twist
process that produces kinematically isolated pions. Semiexclusive data may
teach us more about parton distribution functions of the target and the pion
distribution amplitude. In addition, there is a connection to generalized
parton distribution calculations of exclusive processes in that the
perturbative kernel is the same.


title:
Polarized light-flavor antiquarks from Drell-Yan processes of
  h+\vec{N}\to\vec{l^{+-}} + l^{-+} + X

abstract:
  We propose a formula to determine the first moment of difference between the
polarized $\bar u$- and $\bar d$-quarks in the nucleon, {\it i.e.} $\Delta\bar
u-\Delta \bar d$ from the Drell-Yan processes in collisions of unpolarized
hadrons with longitudinally polarized nucleons by measuring outgoing lepton
helicities. As coefficients in the differential cross section depend on the
$u$- and $d$-quark numbers in the unpolarized hadron beam, the difference
$\Delta\bar u-\Delta\bar d$ can be independently tested by changing the hadron
beam. Moreover, a formula for estimating the $K$-factor in Drell-Yan processes
is also suggested.


title:
Probing hadronization and freeze-out with multiple strange hadrons and
  strange resonances

abstract:
  I)The production of multiple strange baryons in pp interactions is studied.
Here on can directly probe the microscopic decay of color flux tubes, allowing
to differentiate between different string models and a statistical description
of the hadronization.
  II)To analyse the different stages of a heavy ion collision the time
evolution of the elastic and inelastic collision rates in central Pb+Pb
interactions are studied. The microscopic simulation supports the idea of
separated phases (non-equilibrium -> chemical freeze-out -> kinetic freeze-out)
in the evolution of the system. The spectra and abundances of $\Lambda(1520)$,
$K^0(892)$ and other resonances are used to study the break-up dynamics of the
source between chemical and thermal freeze-out.


title: Light Relic Neutralinos

abstract:
  The relic abundance and the scalar cross-section off nucleon for light
neutralinos (of mass below about 45 GeV) are evaluated in an effective MSSM
model without GUT-inspired relations among gaugino masses. It is shown that
these neutralinos may provide a sizeable contribution to the matter density in
the Universe and produce measurable effects in WIMP direct detection
experiments. These properties are elucidated in terms of simple analytical
arguments.


title: Chiral corrections in electroweak processes with heavy mesons

abstract:
  The effective theory based on combined chiral and heavy quark symmetry
(HHChPT) is applied to D meson decays. The predictions for several flavor
changing neutral current rare radiative charm decays are given both in the
Standard Model as well as for the MSSM with and without R parity conservation.
Further, the quenched version of HHChPT is used to estimate effects of quenched
approximation in the lattice calculations of B-> pi, K transitions. In the
thesis several technical details are clarified as well. The explicit
calculation of three and four-point scalar functions with one heavy-quark
propagator is given. Also, existing renormalization group evolutions for B and
K meson decays are modified to perform next-to-leading order evolution of
Wilson coefficients for charm decays.


title: Analysis of dynamical corrections to baryon magnetic moments

abstract:
  We present and analyze QCD corrections to the baryon magnetic moments in
terms of the one-, two-, and three-body operators which appear in the effective
field theory developed in our recent papers. The main corrections are extended
Thomas-type corrections associated with the confining interactions in the
baryon. We investigate the contributions of low-lying angular excitations to
the moments quantitatively and show that they are completely negligible. When
the QCD corrections are combined with the non-quark model contributions of the
meson loops, we obtain a model which describes the moments within a mean
deviation of 0.04 $\mu_N$. The nontrivial interplay of the two types of
corrections to the quark-model moments is analyzed in detail, and explains why
the quark model is so successful. In the course of these calculations, we
parametrize the general spin structure of the $j={1/2}^+$ baryon wave functions
in a form which clearly displays the symmetry properties and the internal
angular momentum content of the wave functions, and allows us to use spin-trace
methods to calculate the many spin matrix elements which appear in the
expressions for the moments. This representation may be useful elsewhere.


title: Vacuum Photon Splitting in Lorentz-Violating Quantum Electrodynamics

abstract:
  Radiative corrections arising from Lorentz violation in the fermion sector
induce a nonzero amplitude for vacuum photon splitting. At one loop, the
on-shell amplitude acquires both CPT-even and CPT-odd contributions forbidden
in conventional electrodynamics.


title: The Present Status on sigma and kappa Meson Properties

abstract:
  The recent experimental data of both pipi / Kpi scattering and production
processes, suggesting the existence of scalar sigma and kappa mesons, are
reviewed. In many pipi /Kpi production processes the direct effects of their
productions are observed, while they are, because of chiral symmetry, hidden in
scattering processes, and now sigma(500--600) and kappa(800--900) are
considered to be confirmed experimentally. The recent criticism on our method
of analyses, which is based on the long believed prejudice of universal pipi /
Kpi phase through scattering and production amplitudes, is explained not to be
valid.


title:
A simple model of generating fermion mass hierarchy in N=1
  supersymmetric 6D SO(10) GUT

abstract:
  We suggest simple models which produce the suitable fermion mass hierarchies
and flavor mixing angles based on the 6 dimensional N=1 supersymmetric SO(10)
grand unified theory compactified on a $T^2/(Z_2 \times Z_2')$ orbifold. We
introduce 6D and 5D matter fields, which contains the 1st and 2nd generation
matter fields as the zero modes, respectively. The 3rd generation matter fields
are located on a 4D brane. The Yukawa couplings for bulk fields are suppressed
by volume factors from extra dimensions. The suitable fermion mass hierarchies
and flavor mixings are generated by the volume suppression factors.


title: Color chiral solitons

abstract:
  We discuss specific features of color chiral solitons (asymptotics,
possibility of confainment, quantization) at example of isolated SU(2) color
skyrmions, i.e. skyrmions in a background field which is the vacuum field
forming the gluon condensate.


title: Measuring the FSR--inclusive pi+pi- cross section

abstract:
  Final state radiation (FSR) in pion--pair production cannot be calculated
reliably because of the composite structure of the pions. However, FSR
corrections have to be taken into account for a precise evaluation of the
hadronic contribution to g-2 of the muon. The role of FSR in both energy scan
and radiative return experiments is discussed. It is shown how FSR influences
the pion form factor extraction from experimental data and, as a consequence,
the evaluation of a_mu^had. In fact the O(alpha) FSR corrections should be
included to reach the precision we are aiming at. We argue that for an
extraction of the desired FSR--inclusive cross section sigma^(gamma)_had a
photon--inclusive scan measurement of the ``e+e- to pi+pi- + photons'' cross
section is needed. For exclusive scan and radiative return measurements in
contrast we have to rely on ad hoc FSR models if we want to obtain either
sigma^(gamma)_had or the FSR--exclusive cross section sigma^(0)_had. We thus
advocate to consider seriously precise photon--inclusive energy scan
measurements at present and future low energy e+e- facilities. Then together
with radiative return measurements from DAFNE and BABAR and forthcoming scan
measurements at VEPP-2000 we have a good chance to substantially improve the
evaluation of a_mu^had in the future.


title: Some aspects of neutrino astrophysics

abstract:
  Selected topics in neutrino astrophysics are reviewed. These include the
production of low energy neutrino flux from cores of collapsing stars and the
expected high energy neutrino flux from some other astrophysical sites such as
the galactic plane as well as the center of some distant galaxies. The expected
changes in these neutrino fluxes because of neutrino oscillations during their
propagation to us are described. Observational signatures for these neutrino
fluxes with and without neutrino oscillations are discussed.


title: Supersymmetry Parameter Analysis

abstract:
  Supersymmetric particles can be produced copiously at future colliders. From
the high-precision data taken at e+e- linear colliders, TESLA in particular,
and combined with results from LHC, and CLIC later, the low-energy parameters
of the supersymmetric model can be determined. Evolving the parameters from the
low-energy scale to the high-scale by means of renormalization group techniques
the fundamental supersymmetry parameters at the high scale, GUT or Planck, can
be reconstructed to reveal the origin of supersymmetry breaking.


title:
Comparing the QCD potential in Perturbative QCD and Lattice QCD at large
  distances

abstract:
  We compare the perturbatively calculated QCD potential to that obtained from
lattice calculations in the theory without light quark flavours. We examine
E_tot(r) = 2 m_pole + V_QCD(r) by re-expressing it in the MSbar mass m =
m^MSbar(m^MSbar) and by choosing specific prescriptions for fixing the scale mu
(dependent on r and m). By adjusting m so as to maximise the range of
convergence, we show that perturbative and lattice calculations agree up to
3*r_0 ~ 7.5 GeV^-1 (r_0 is the Sommer scale) within the uncertainty of order
Lambda^3 r^2.


title:
The one loop renormalization of the effective Higgs sector and its
  implications

abstract:
  We study the one-loop renormalization the standard model with anomalous Higgs
couplings ($O(p^2)$) by using the background field method, and provide the
whole divergence structure at one loop level. The one-loop divergence structure
indicates that, under the quantum corrections, only after taking into account
the mass terms of Z bosons ($O(p^2)$) and the whole bosonic sector of the
electroweak chiral Lagrangian ($O(p^4)$), can the effective Lagrangian be
complete up to $O(p^4)$.


title: Universal extra dimensions and Z->b bar-b

abstract:
  We study, at the one loop level, the dominant contributions from a single
universal extra dimension to the process (Z\to b\bar{b}). By resorting to the
gaugeless limit of the theory we explain why the result is expected to display
a strong dependence on the mass of the top-quark, not identified in the early
literature. A detailed calculation corroborates this expectation, giving rise
to a lower bound for the compactification scale which is comparable to that
obtained from the $\rho$ parameter. An estimate of the subleading corrections
is furnished, together with a qualitative discussion on the difference between
the present results and those derived previously for the non-universal case.


title: Low temperature relations in QCD

abstract:
  In this talk I discuss the low temperature relations for the trace of the
energy-momentum tensor in QCD with two and three quarks. It is shown that the
temperature derivatives of the anomalous and normal (quark massive term)
contributions to the trace of the energy-momentum tensor in QCD are equal to
each other in the low temperature region. Leading corrections connected with
$\pi\pi$-interactions and thermal excitations of $K$ and $\eta$ mesons are
calculated.


title: Spin light of neutrino in matter and electromagnetic fields

abstract:
  A new type of electromagnetic radiation by a neutrino with non-zero magnetic
(and/or electric) moment moving in background matter and electromagnetic field
is considered. This radiation originates from the quantum spin flip transitions
and we have named it as "spin light of neutrino"($SL\nu$). The neutrino
initially unpolarized beam (equal mixture of $\nu_{L}$ and $\nu_{R}$) can be
converted to the totally polarized beam composed of only $\nu_{R}$ by the
neutrino spin light in matter and electromagnetic fields. The quasi-classical
theory of this radiation is developed on the basis of the generalized
Bargmann-Michel-Telegdi equation. The considered radiation is important for
environments with high effective densities, $n$, because the total radiation
power is proportional to $n^{4}$. The spin light of neutrino, in contrast to
the Cherenkov or transition radiation of neutrino in matter, does not vanish in
the case of the refractive index of matter is equal to unit. The specific
features of this new radiation are: (i) the total power of the radiation is
proportional to $\gamma ^{4}$, and (ii) the radiation is beamed within a small
angle $\delta \theta \sim \gamma^{-1}$, where $\gamma$ is the neutrino Lorentz
factor. Applications of this new type of neutrino radiation to astrophysics, in
particular to gamma-ray bursts, and the early universe should be important.


title:
Countintg Extra Dimensions: Magnetic Cherenkov Radiation from High
  Energy Neutrinos

abstract:
  In theories which require a space of dimension d>4, there is a natural
mechanism of suppressing neutrino masses: while Standard Model fields are
confined to a 3-brane, right handed neutrinos live in the bulk. Due to
Kaluza-Klein excitations, the effective magnetic moments of neutrinos are
enhanced. The effective magnetic moment is a monotonically growing function of
the energy of the neutrino: consequently, high energy neutrinos can emit
observable amounts of magnetic Cherenkov radiation. By observing the energy
dependence of the magnetic Cherenkov radiation, one may be able to determine
the number of compactified dimensions.


title:
Heavy flavours production in deeply inelastic scattering and gluon
  density in the proton

abstract:
  Heavy flavours production in e-p DIS is studied at intermediate values of the
transferred four-momentum square, under the assumption of boson-gluon-fusion
mechanism dominance (no intrinsic heavy flavours contributions). In this
framework different expressions for the splitting functions in the gluon
density evolution equation, with respect to the standard (DGLAP) ones, are
explicitly derived.


title:
Prospective Analysis Spin- and CP-sensitive Variables in H -> ZZ -> l_1
  l_1 l_2 l_2 with Atlas

abstract:
  A possibility to prove spin and CP-eigenvalue of a Standard Model (SM) Higgs
boson is presented. We exploit angular correlations in the subsequent decay H
-> ZZ -> 4l (muons or electrons) for Higgs masses above 200 GeV. We compare the
angular distributions of the leptons originating from the SM Higgs with those
resulting from decays of hypothetical particles with differing quantum numbers.
We restrict our analysis to the use of the Atlas-detector which is one of two
multi-purpose detectors at the upcoming 14 TeV proton-proton-collider (LHC) at
CERN. By applying a fast simulation of the Atlas detector it can be shown that
these correlations will be measured sufficiently well that consistency with the
spin-CP hypothesis 0+ of the Standard Model can be verified and the 0- and 1+-
can be ruled out with an integrated luminosity of 100 fb^-1.


title: b -> s Transitions: A New Frontier for Indirect SUSY Searches

abstract:
  The present unitarity triangle fit, whose essential input is represented by
the s to d and b to d transition processes, fully agrees with the SM. However,
most of the phenomena involving b to s transitions are still largely unexplored
and hence b to s phenomenology still constitutes a place for new physics
manifestations, in spite of the tremendous experimental and theoretical
progress on B to X_s gamma. We perform a systematic study of the CP conserving
and violating SUSY contributions to b to s processes in a generic MSSM. We
consider gluino exchange contributions including NLO QCD corrections and
lattice hadronic matrix elements for Delta B = 2 and Delta B = 1 processes. We
take into account all available experimental information on processes involving
b to s transitions (B to X_s gamma, B to X_s l^+ l^- and the lower bound on the
B_s - bar B_s mass difference Delta M_s). We study the correlations among the
relevant observables under scrutiny at present or in a not too far future:
Delta M_s and the amount of CP violation in B to phi K_s, B_s to J/psi phi, B
to X_s gamma. In particular we discuss the recent data by BaBar and BELLE on
the time-dependent CP asymmetry in the decay B to phi K_s which suggest a
deviation from the SM expectation. Our results show that the processes
involving b to s transitions represent a splendid opportunity to constrain
different MSSM realizations, and, even more important, that they offer concrete
prospects to exhibit SUSY signals at B factories and hadron colliders in spite
of all the past frustration in FCNC searches of new physics hints.


title: Overview of the COMPETE Program

abstract:
  Nowadays, scientific databases have become the bread-and-butter of particle
physicists. These databases must be maintained and checked repeatedly to insure
the accuracy of their content. The COMPETE collaboration aims at motivating
data maintenance via the interfacing of theory and experiment at the database
level. The database concept then needs to be supplemented by a "model-base".
Such an object enables one not only to decide what the best description may be,
but also to discern what potential problems exist in the data. The
systematization of such a cross-fertilization between models and data results
in the "object of knowledge" that is the point at which all existing
information resources on a given problem could converge. There are many
advantages to such a global approach. First of all, the maintenance of a data
set is not a static task: it needs to be motivated by physics. The second
advantage is that one can have a common testing ground for theories and models.
Thirdly, an extensive theoretical database can be used to plan new experiments
and to predict various quantities. Finally, as new data come in, one can very
quickly decide on their theoretical impact, and hence immediately evaluate the
need for new physics ideas.
  As we want to treat a large amount of data and many models, computer
technology constitutes an important part of our activity. We have concentrated
on the elaboration of artificial intelligence decision-making algorithms, as
well as on the delivery of computer tools for the end-user. Further linkage
with existing databases, such as PDG, COMPAS, and HEPDATA is being developed or
planned.


title:
Electric magnetic duality of the confining flux tube in
  Abelian-projected gluodynamics

abstract:
  The structure of the Abelian-projected (AP) flux tube in SU(2) gauge theory
in the maximally Abelian gauge is studied by applying the Hodge decomposition
to the Abelian Wilson loop. It is shown that the profile of the AP flux tube
has the same structure as the classical flux tube solution in the dual Abelian
Higgs model, which is composed of a Coulombic and a solenoidal electric field
linked by monopole supercurrent.


title:
Casimir scaling hypothesis on the nonperturbative force in QCD vs. dual
  superconducting scenario of confinement

abstract:
  We discuss the Casimir scaling hypothesis on the nonperturbative force in
terms of the dual superconducting picture of the QCD vacuum by calculating the
string tensions of flux tubes associated with static charges in various SU(3)
representations in the dual Ginzburg-Landau (DGL) theory.


title:
String representation of the dual Ginzburg-Landau theory beyond the
  London limit

abstract:
  The effective string action of the color-electric flux tube in the dual
Ginzburg-Landau (DGL) theory is studied by performing a path-integral analysis
by taking into account the finite thickness of the flux tube. A modified Yukawa
interaction appears as a boundary contribution and is reduced into the ordinary
Yukawa interaction in the London Limit.


title: Neutrino oscillations from relativistic flavor currents

abstract:
  By resorting to recent results on the relativistic currents for mixed
(flavor) fields, we calculate a space-time dependent neutrino oscillation
formula in Quantum Field Theory. Our formulation provides an alternative to
existing approaches for the derivation of space dependent oscillation formulas
and it also accounts for the corrections due to the non-trivial nature of the
flavor vacuum. By exploring different limits of our formula, we recover already
known results. We study in detail the case of one-dimensional propagation with
gaussian wavepackets both in the relativistic and in the non-relativistic
regions: in the last case, numerical evaluations of our result show significant
deviations from the standard formula.


title:
Dependence of hadronic properties on Quark Masses and Constraints on
  their Cosmological Variation

abstract:
  We follow our previous paper on possible cosmological variation of weak scale
(quark masses) and strong scale, inspired by data on cosmological variation of
the electromagnetic fine structure constant from distant quasar (QSO)
absorption spectra. In this work we identify the {\em strange quark mass} $m_s$
as the most important quantity, and the {\em sigma meson mass} as the
ingredient of the nuclear forces most sensitive to it. As a result, we claim
significantly stronger limits on ratio of weak/strong scale
($W=m_s/\Lambda_{QCD}$) variation following from our previous discussion of
primordial Big-Bang Nucleosynthesis ($|\delta W/W|<0.006$) and
  Oklo natural nuclear reactor ($|\delta W/W|<1.2 \cdot 10^{-10}$; there is
also a non-zero solution
  $\delta W/W=(-0.56 \pm 0.05) \cdot 10^{-9}$) .


title: Thermalization of fermionic quantum fields

abstract:
  We solve the nonequilibrium dynamics of a 3+1 dimensional theory with Dirac
fermions coupled to scalars via a chirally invariant Yukawa interaction. The
results are obtained from a systematic coupling expansion of the 2PI effective
action to lowest non-trivial order, which includes scattering as well as memory
and off-shell effects. The dynamics is solved numerically without further
approximation, for different far-from-equilibrium initial conditions. The
late-time behavior is demonstrated to be insensitive to the details of the
initial conditions and to be uniquely determined by the initial energy density.
Moreover, we show that at late time the system is very well characterized by a
thermal ensemble. In particular, we are able to observe the emergence of
Fermi--Dirac and Bose--Einstein distributions from the nonequilibrium dynamics.


title: Vector Manifestation in Hot and/or Dense Matter

abstract:
  In this talk I summarize main features of the vector manifestation (VM) which
was recently proposed as a novel manifestation of the Wigner realization of
chiral symmetry in which the symmetry is restored at the critical point by the
massless degenerate pion (and its flavor partners) and the rho meson (and its
flavor partners) as the chiral partner. I show how the VM is realized in hot
and dense QCD using the effective field theory of QCD based on the hidden local
symmetry.


title: Recent Progress in Perturbative Quantum Field Theory

abstract:
  In this talk, the recent breakthrough in two-loop perturbative calculations
is reviewed, with emphasis on the applications to phenomenological studies. The
recent precision measurement of the anomalous magnetic moment of the muon by
the Brookhaven g-2 collaboration is also used as an illustrative example of the
importance of Standard Model precision perturbative calculations to further our
understanding of Nature.


title: Experimental Challenges for QCD - The past and the future

abstract:
  The past leaves the surprising experimental successes of the simple
constituent quark model to be expained by QCD. Surprising agreement with
experiment from simple Sakharov-Zeldovich model (1966) having quarks with
effective masses and hyperfine interaction. Nambu's (1966) Colored quarks with
gauge gluons gave mass spectrum with only $qqq$ and $\bar q$ bound states. The
future opens the way to new insight into QCD from heavy flavor experiments


title: Polarized lepton-nucleon scattering in frame of various guage model

abstract:
  The cross section for deep inelastic lepton-nucleon scattering with arbitrary
polarized scattering fermions is calculated within the electroweak Standard
Model and non-minimal gauge models with additional neutral boson. The
Lorentz-invariant formulas for cross section and all types of electroweak
asymmetries, polarized, charge-polarized, charged, including the first-order
electroweak radiative correction are obtained. We present a detailed numerical
discussion of the radiative corrections to different kinds of electroweak
asymmetries. The difference in the results obtained in frame of minimal and
nonminimal gauge models increases significantly with the energy of incident
leptons and reaches the maximum value for the largest values of scaling
variable $y$, where radiative corrections is important object for precision
analysis of experimental data.


title:
The investigation of spin effects in photon production with fermion pair
  in gamma-gamma collisions

abstract:
  The exclusive reaction $ \gamma\gamma\to f \bar{f} \gamma$ is considered as
the possible calibration process on the linear photon collider. We analyse the
energy spectrum and total cross section dependence on the detector parameters
at various initial beam helicities.


title: Polarized Parton Densities

abstract:
  In this talk we summarize main results of a recent determination of the
polarized deeply inelastic parton distributions to NLO from the world data. In
the analysis the LO and NLO parton densities and their $1\sigma$ statistical
errors were derived and parameterized. The strong coupling constant
$\alpha_s(M_Z^2)$ is determined $\alpha_s(M_Z^2) = 0.113 \pm 0.004 {\rm
(stat.)} \pm~0.004 {\rm (fac.)} +0.008/-0.005 {\rm (ren.)}$ Comparisons of the
low moments of the parton densities with recent lattice results are given. A
detailed error-analysis of the gluon density is performed.


title: Hints of Energy Dependences in AGASA EHECR Arrival Directions

abstract:
  A correlation and probability analysis of the distribution of arrival
directions for a sample of AGASA events reported to have energies above
4x10^{19} eV shows the small scale clustering to remain significant at the 99.5
- 99.9% CL and to be consistent with previous results. For the sample taken as
a whole, there are no departures from either homogeneity or isotropy on angular
scales greater than 5 degrees. The sample of events with E >= 6x10^{19} eV
possesses no small scale clustering. Cross correlating subsamples partitioned
by energy reveals three uncorrelated distributions in the intervals 4 -
5x10^{19} eV, 5 - (8-10)x10^{19} eV, and greater than (8-10)x10^{19} eV. The
partition with 5 <= E < 8x10^{19} eV is correlated with the supergalactic
equatorial plane while the other two groups are statistically consistent with
isotropic distributions. The presence of three distinct energy-partitioned
groups of events could reflect possible changes in primary composition,
different source distributions, differing levels of GZK losses, or deflection
effects of magnetic fields.


title:
A probe of the Radion-Higgs mixing in the Randall-Sundrum model at e^+
  e^- colliders

abstract:
  In the Randall-Sundrum model, the radion-Higgs mixing is weakly suppressed by
the effective electroweak scale. A novel feature of the existence of
gravity-scalar mixing would be a sizable three-point vertex among the KK
graviton, Higgs and radion. We study this vertex in the process e^+ e^- -> h
phi, which is allowed only with a non-zero radion-Higgs mixing. It is shown
that the angular distribution is a unique characteristic of the exchange of
massive spin-2 gravitons, and the total cross section at the future e^+ e^-
collider is big enough to cover a large portion of the parameter space where
the LEP/LEP II data cannot constrain.


title: Heavy Flavour Production

abstract: I discuss few recent developments in Heavy Flavour Production phenomenology.


title: Anomalous net-baryon-rapidity spectra at RHIC

abstract:
  Net-baryon rapidity distributions in central Au+Au collisions at 200 GeV per
nucleon are shown to consist of three components. The nonequilibrium
contributions are accounted for in a Relativistic Diffusion Model. Near
midrapidity, a third fraction containing approximately 22 protons reaches local
statistical equilibrium in a discontinuous transition. It may be associated
with a deconfinement of the participant partons and thus, serve as a signature
for Quark-Gluon Matter formation.


title:
The eta->pi^0 pi^0 gamma gamma decay in generalized chiral perturbation
  theory

abstract:
  Calculations of eta->pi^0 pi^0 gamma gamma decay in generalized chiral
perturbation theory are presented. Tree level and some of next-to-leading
corrections are involved. Sensitivity to the deviations from the standard
chiral perturbation theory is discussed.


title: Quark-Lepton Nonuniversality

abstract:
  There is new experimental evidence which may be interpreted as a small
departure from quark-lepton universality. We propose to understand this as the
result of a hierarchy of mass scales in analogy to $m_u, m_d << \Lambda_{QCD}$
for strong isospin. We show $(G_F)^{NC}_{lq} < (G_F)^{CC}_{lq} <
(G_F)^{CC}_{ll} < (G_F)^{NC}_{ll}$ in principle, but all are still
approximately equal. New physics is predicted at the TeV scale.


title:
Solution of coupled vertex and propagator Dyson-Schwinger equations in
  the scalar Munczek-Nemirovsky model

abstract:
  In a scalar $\phi^2\chi$ model, we exactly solve the vertex and $\phi$
propagator Dyson-Schwinger equations under the assumption of a spatially
constant (Munczek-Nemirovsky) propagator for the $\chi$ field. Various
truncation schemes are also considered.


title:
The Vector Manifestation and Effective Degrees of Freedom At Chiral
  Restoration

abstract:
  The role of effective degrees of freedom on the vector and axial-vector
susceptibilities and the pion velocity at chiral restoration is analyzed. We
consider two possible scenarios, one in which pions are considered to be the
only low-lying degrees of freedom -- that we shall refer to as "standard" --
and the other in which pions, vector mesons and constituent quarks (or
quasiquarks in short) are the relevant low-lying degrees of freedom -- that we
shall refer to as "vector manifestation (VM)." We show at one-loop order in
chiral perturbation theory with hidden local symmetry Lagrangian that while in
the standard scenario, the pion velocity vanishes at the chiral transition, it
instead approaches unity in the VM scenario. If the VM is realized in nature,
the chiral phase structure of hadronic matter can be much richer than that in
the standard one and the phase transition will be a smooth crossover: Sharp
vector and scalar excitations are expected in the vicinity of the critical
point. Some indirect indications that lend support to the VM scenario, and in
consequence to BR scaling, are discussed.


title: Phenomenological implications of brane world scenarios with low tension

abstract:
  The recent proposal of theories with compactified large extra dimensions is
reviewed. We pay especial attention to brane world models with low tension
where the only relevant degrees of freedom at low energies are the Standard
Model (SM) particles and the branons, which are transversal brane oscillations.
By using an effective Lagrangian, we study some phenomenological consequences
of these scenarios in a model independent way.


title: Strong and Electromagnetic Transitions in Heavy Flavor Mesons

abstract:
  The electromagnetic and pionic transitions in mesons with heavy flavor quarks
are calculated within the framework of the covariant Blankenbecler-Sugar
equation. The M1 transitions in the charmonium system are shown to be sensitive
to the relativistic aspect of the spin-flip magnetic moment operator, and the
Lorentz structure of the Q\bar Q interaction. The observed rate for the M1
transition J/psi -> eta_c gamma is shown to provide strong evidence for a
scalar confining interaction.
  The single pion and dipion widths are calculated for the heavy-light D
mesons, by employment of the pseudovector pion-quark coupling suggested by
chiral perturbation theory. The pionic transitions D* -> D pi are shown to
provide constraining information on the pion-quark axial coupling g_A^q. It is
also shown that axial exchange charge contributions associated with the Q\bar q
interaction suppress the axial charge amplitude for pion emission by an order
of magnitude. The models for pi and M1 transitions also make it possible to
estimate the eta-nucleon coupling from the transition Ds* -> D_s pi0, once the
value of the pi^0 - eta mixing angle is known.
  Finally, the dipion transition rates of the L=1 D mesons are calculated, and
are shown to make up a significant fraction of their total widths for strong
decay. The pipi transitions between S-wave charmonium and bottomonium states
are modeled in terms of a broad sigma meson with derivative couplings to pions.


title: What is the simplest effective approach to hot QCD thermodynamics?

abstract:
  The dimensionally reduced action is believed to provide for a theoretically
consistent and numerically precise effective description of the thermodynamics
of the quark-gluon plasma, once the temperature is above a few hundred MeV.
Although dramatically simpler than the original QCD it is, however, still a
strongly interacting, confining theory. In this talk I speculate on whether
there could exist a further simplified recipe within that theory, for
physically relevant temperatures, which would already lead to a
phenomenologically satisfactory description of the free energy and various
correlation lengths of hot QCD, but with only a minimal amount of numerical
non-perturbative input needed.


title: Why the high lying glueball does not mix with the neighbouring $f_0$

abstract:
  Chiral symmetry restoration in high-lying hadron spectra implies that hadrons
which belong to different irreducible representations of the parity-chiral
group cannot mix. This explains why the $f_0(2102 \pm 13)$, which was suggested
to be a glueball, and hence must belong to the scalar (0,0) representation of
the chiral group, cannot mix with the neighbouring $f_0(2040 \pm 38)$, which
was interpreted as a $ n\bar n$ state, and that belongs to the $(1/2,1/2)$
representation of the chiral group. If confirmed, then we have an access to a
"true" glueball of QCD.


title:
Kinematical Limits on Higgs Boson Production via Gluon Fusion in
  Association with Jets

abstract:
  In this paper, we analyze the high-energy limits for Higgs boson plus two jet
production. We consider two high-energy limits, corresponding to two different
kinematic regions: a) the Higgs boson is centrally located in rapidity between
the two jets, and very far from either jet; b) the Higgs boson is close to one
jet in rapidity, and both of these are very far from the other jet. In both
cases the amplitudes factorize into impact factors or coefficient functions
connected by gluons exchanged in the t channel. Accordingly, we compute the
coefficient function for the production of a Higgs boson from two off-shell
gluons, and the impact factors for the production of a Higgs boson in
association with a gluon or a quark jet. We include the full top quark mass
dependence and compare this with the result obtained in the large top-mass
limit.


title: Gauge Higgs Unification in the Left-Right Model

abstract:
  We construct a supersymmetric left-right model in four dimension with
gauge-Higgs unification starting from a SU(3)_c x SU(4)_w x U(1)_{B-L} gauge
symmetry in five dimension. The model has several interesting features, such
as, the CKM mixings in the quark sector are naturally small while for the
neutrino sector it is not, light neutrino masses can be generated via the
seesaw mechanism in the usual way, and the model has a U(1)_R symmetry which
naturally forbid dimension five proton decay operators. We also discuss the
grand unification of our model in SO(12) in five dimensions.


title:
Revisiting Top-Bottom-Tau Yukawa Unification in Supersymmetric Grand
  Unified Theories

abstract:
  Third family Yukawa unification, as suggested by minimal SO(10) unification,
is revisited in light of recent experimental measurements and theoretical
progress. We characterize unification in a semi-model-independent fashion, and
conclude that finite $b$ quark mass corrections from superpartners must be
nonzero, but much smaller than naively would be expected. We show that a
solution that does not require cancellations of dangerously large tanbeta
effects in observables implies that scalar superpartner masses should be
substantially heavier than the Z scale, and perhaps inaccessible to all
currently approved colliders. On the other hand, gauginos must be significantly
lighter than the scalars. We demonstrate that a spectrum of anomaly-mediated
gaugino masses and heavy scalars works well as a theory compatible with third
family Yukawa unification and dark matter observations.


title:
A Lithium Experiment as the Stringent Test of the Theory of Stellar
  Evolution

abstract:
  We show that a lithium experiment has a potential to confirm or reject the
value 1.5% of the solar luminosity attributed to a CNO-cycle by the SSM and to
prove that the difference between total energy release of the Sun and what is
produced in a hydrogen sequence is really produced in CNO cycle. This will be
the stringent test of the theory of stellar evolution and the termination of
the long-standing goal - the neutrino spectroscopy of the interior of the Sun.
At the present time one can see no other way to solve this task, it can be
accomplished only with a lithium detector utilizing its high sensitivity to
CNO-neutrinos and very high accuracy in the theoretical evaluation of the
cross-section of neutrino capture by 7Li. The analyses shows that although a
lithium detector is a radiochemical one, principally it is possible to find
separately the fluxes of 13N- and 15O-neutrinos.


title: Heavy quark production at HERA with BFKL and CCFM dynamics

abstract:
  In the framework of the semi-hard ($k_t-$factorization) approach, we analyze
the various charm production processes in the kinematic region covered by the
HERA experiments


title:
Novel Transversity Properties in Semi-Inclusive Deep Inelastic
  Scattering

abstract:
  The $T$-odd distribution functions contributing to transversity properties of
the nucleon and their role in fueling nontrivial contributions to azimuthal
asymmetries in semi-inclusive deep inelastic scattering are investigated. We
use a dynamical model to evaluate these quantities in terms of HERMES
kinematics.


title:
Explicit expressions of the 'Lambda' baryon polarizations in (Lambda_b
  -> Lambda l^+ l^-) decay for the massive lepton case

abstract:
  We present the explicit form of the expressions of the 'Lambda' baryon
polarizations in (Lambda_b -> Lambda l^+ l^-) decay for the massive lepton case
as a complementary to our previous work prep: hep--ph/0211447.


title: Linking the parameters of diquark-quark model to the Cabibbo angle

abstract:
  From two different modifications of the Gell-Mann-Okubo mass relation for
(1/2)^+ baryons: the first one given by a version of diquark-quark model and
the second one being the optimal mass sum rule obtained by using quantum groups
U_q(su_n) for the role of hadronic flavor symmetries, we find direct connection
of the mass parameters of the diquark-quark model of Lichtenberg, Tassie and
Keleman to the (proper value of) q-parameter and then to the Cabibbo angle.


title: Anomalous dimensions of Wilson operators in N=4 SYM theory

abstract:
  We present the results of two-loop calculations of the anomalous dimension
matrix for the Wilson twist-2 operators in the N=4 Supersymmetric Yang-Mills
theory for polarized and unpolarized cases. This matrix can be transformed to a
triangle form by the same similarity transformation as in the leading order.
The eigenvalues of the anomalous dimension matrix are expressed in terms of an
universal function with its argument shifted by integer numbers. In the
conclusion we discuss relations between the weak and strong coupling regimes in
the framework of the AdS/CFT correspondence.


title: The effect of a light radion on the triviality bound on higgs mass

abstract:
  In this paper we study how the triviality bound on higgs mass in the context
of the SM is modified by a light stabilized radion of the Goldberger-Wise
variety. Our approach is inherently perturbative. Including the radion
contribution to $\bt(\l)$ and $\bt(g_t)$ to one loop we evolve the higgs self
coupling $\l$ from the cut off $\L(=\vphi)$ down to the EW scale $\mu_0 = v$.
The triviality bound is obtained by requiring that $\l(\L) = \sqrt{4 \pi}$
which is the perturbative limit. We also study the effect of small changes in
the UVBC on the triviality bound both in the presence and absence of a light
radion.


title: Higgs Physics at the Linear Collider

abstract:
  We review the theory of Higgs bosons, with emphasis on the Higgs scalars of
the Standard Model and its non-supersymmetric and supersymmetric extensions.
After surveying the expected knowledge of Higgs boson physics after the
Tevatron and LHC experimental programs, we examine in detail expectations for
precision Higgs measurements at a future e+e- linear collider (LC). A
comprehensive phenomenological profile can be assembled from LC Higgs studies
(both in e+e- and gamma-gamma collisions). The Giga-Z option can provide
important constraints and consistency checks for the theory of electroweak
symmetry breaking.


title:
Final-state Rescattering and SU(3) Symmetry Breaking in B->DK and
  B->DK^* Decays

abstract:
  The first observation of $\bar{B}^0_d\to D^0\bar{K}^0$ and $\bar{B}^0_d\to
D^0\bar{K}^{*0}$ transitions by the Belle Collaboration allows us to do a
complete isospin analysis of $B\to DK^{(*)}$ decay modes. We find that their
respective isospin phase shifts are very likely to lie in the ranges $37^\circ
\leq (\phi_1 -\phi_0)_{DK} \leq 63^\circ$ (or around $50^\circ$) and $25^\circ
\leq (\phi_1 -\phi_0)_{DK^*} \leq 50^\circ$ (or around $35^\circ$), although
the possibility $(\phi_1 -\phi_0)_{DK} = (\phi_1 -\phi_0)_{DK^*} = 0^\circ$
cannot be ruled out at present. Thus significant final-state rescattering
effects are possible to exist in such exclusive $|\Delta B| = |\Delta C| =
|\Delta S| =1$ processes. We determine the spectator and color-suppressed
spectator quark-diagram amplitudes of $B\to DK$ and $B\to DK^*$ decays, and
compare them with the corresponding quark-diagram amplitudes of $B\to D\pi$ and
$B\to D\rho$ decays. The effects of SU(3) flavor symmetry breaking are in most
cases understandable in the factorization approximation, which works for the
individual isospin amplitudes. Very instructive predictions are also obtained
for the branching fractions of rare $\bar{B}^0_d \to \bar{D}^0 \bar{K}^{(*)0}$,
$B^-_u \to \bar{D}^0 K^{(*)-}$ and $B^-_u \to D^- \bar{K}^{(*)0}$ transitions.


title: 't Hooft determinant: Fluctuatioins and Multiple Vacua

abstract:
  The 't Hooft six quark flavor mixing interaction (N_f=3) is bosonized by the
path integral method. The considered complete Lagrangian is constructed on the
basis of the combined 't Hooft and U(3)X U(3) extended chiral four fermion
Nambu -- Jona-Lasinio interactions. The method of the steepest descents is used
to derive the effective mesonic Lagrangian. Additionally to the known lowest
order stationary phase (SP) result of Reinhardt and Alkofer we obtain the
contribution from the small quantum fluctuations of bosonic configurations
around their stationary phase trajectories. Fluctuations give rise to
multivalued solutions of the gap equations, marked at instances by drastic
changes in the quark condensates, a novel scenario for the vacuum state of
hadrons at low energies.


title:
Confinement and cut-off: a model for the pion quark distribution
  function

abstract:
  The pion structure function is investigated in a simple pseudo-scalar
coupling model of pion and constituent quark fields. The imaginary part of the
forward Compton scattering amplitude is evaluated. We show that the
introduction of non-perturbative effects, linked through a cut-off to the size
of the pion, allows the reproduction of important features of the pion quark
distribution function.


title: CP Phases, LFV, RpV & all that

abstract:
  Most phenomenological analyses of searches for supersymmetric particles have
been performed within the MSSM with real SUSY parameters and conserved R-parity
and lepton flavour. Here we summarize recent results obtained in the (s)lepton
sector when one of the above assumptions is relaxed.


title:
Cross Section Oscillations in the Coherent Charmonium Photoproduction
  off Nuclei at Moderate Energies

abstract:
  We calculate the coherent charmonium photoproduction at intermediate energies
accounting for the physics of the charmonium bound states and the dependence of
the cross section on the region occupied by color using a correspondingly
adjusted generalized vector dominance model (GVDM). In the photon energy domain
where the coherence lengths are comparable to the average internucleon
distances in nuclei and the nuclear radii we found that significant
oscillations of the total and forward photoproduction cross sections governed
by the longitudinal nuclear form factor are strongly modified by the charmonium
rescatterings accounting for the nondiagonal transitions related to the color
screening phenomenon. We discuss how these oscillations can influence the
determination of the genuine charmonium-nucleon cross sections in the
forthcoming SLAC E160 experiment on low energy J/psi and psi' photoproduction
off nuclei.


title:
Proceedings to the workshops 'What comes beyond the Standard model',
  2000, 2001, 2002, Volume 2: Proceedings (Part I)

abstract:
  Contents (Part 1): 1.Derivation of Lorentz Invariance and Three Space
Dimensions in Generic Field Theory (C D. Froggatt and H. B. Nielsen) 2.Unitary
Representations, Noncompact Groups SO(q; d - q)...(N. Mankoc Borstnik, H. B.
Nielsen and D. Lukman) 3.Weyl Spinor of SO(1; 13), Families of Spinors ...(A.
Borstnik Bracic and N. Mankoc Borstnik) 4.A Tight Packing Problem (A. Kleppe)
5.Why so Few Particle Species? ... (D.L. Bennett and A. Kleppe) 6.About Number
of Families (D. Lukman, A. Kleppe and N.S. Mankoc Borstnik) 7.Coupling Constant
Unification in Spin-Charge Unifying Model ....(N. Mankoc Borstnik and H. B.
Nielsen)
  (Contents of Part 2 [hep-ph/0301030]: 8.Renormalization of Coupling Constants
in the Minimal SUSY Models (R. B. Nevzorov, K. A. Ter-Martirosyan and M. A.
Trusov) 9.Multiple Point Model and Phase Transition Couplings ...(L.V.
Laperashvili, D.A. Ryzhikh and H.B. Nielsen) 10.Family Replicated Fit of All
Quark and Lepton Masses and Mixings (H. B. Nielsen and Y. Takanishi) 11.Family
Replicated Calculation of Baryogenesis (H. B. Nielsen and Y. Takanishi) 12.
Neutrino Oscillations in Vacuum on the Large Distance (D.A. Ryzhikh and K.A.
Ter-Martirosyan) 13. Possibility of an Additional Source of Time Reversal
Violation for Neutrinos (R. Erdem) 14.Quark-Lepton Masses and the Neutrino
Puzzle in the AGUT Model (C.D. Froggatt) 15.Neutrinos in the Family Replicated
Gauge Group Model (C.D. Froggatt))


title:
Proceedings to the workshops 'What comes beyond the Standard model',
  2000, 2001, 2002, Volume 2: Proceedings (Part II)

abstract:
  Contents (Part 2): 8.Renormalization of Coupling Constants in the Minimal
SUSY Models (R. B. Nevzorov, K. A. Ter-Martirosyan and M. A. Trusov) 9.Multiple
Point Model and Phase Transition Couplings ...(L.V. Laperashvili, D.A. Ryzhikh
and H.B. Nielsen) 10.Family Replicated Fit of All Quark and Lepton Masses and
Mixings (H. B. Nielsen and Y. Takanishi) 11.Family Replicated Calculation of
Baryogenesis (H. B. Nielsen and Y. Takanishi) 12. Neutrino Oscillations in
Vacuum on the Large Distance (D.A. Ryzhikh and K.A. Ter-Martirosyan) 13.
Possibility of an Additional Source of Time Reversal Violation for Neutrinos
(R. Erdem) 14.Quark-Lepton Masses and the Neutrino Puzzle in the AGUT Model
(C.D. Froggatt) 15.Neutrinos in the Family Replicated Gauge Group Model (C.D.
Froggatt)
  (Contents of Part 1 [hep-ph/0301029]: 1.Derivation of Lorentz Invariance and
Three Space Dimensions in Generic Field Theory (C D. Froggatt and H. B.
Nielsen) 2.Unitary Representations, Noncompact Groups SO(q; d - q)...(N. Mankoc
Borstnik, H. B. Nielsen and D. Lukman) 3.Weyl Spinor of SO(1; 13), Families of
Spinors ...(A. Borstnik Bracic and N. Mankoc Borstnik) 4.A Tight Packing
Problem (A. Kleppe) 5.Why so Few Particle Species? ... (D.L. Bennett and A.
Kleppe) 6.About Number of Families (D. Lukman, A. Kleppe and N.S. Mankoc
Borstnik) 7.Coupling Constant Unification in Spin-Charge Unifying Model ....(N.
Mankoc Borstnik and H. B. Nielsen))


title: Size and shape of baryons in a large N_c quark model

abstract:
  Baryon charge radii and quadrupole moments are calculated in a quark model
generalized to an arbitrary number (N_c) of colors. Several relations among the
charge radii and quadrupole moments are found. In particular, a previously
derived relation between the neutron charge radius and the N-->Delta transition
quadrupole moment is shown to hold for physical baryons as well in the large
N_c limit.


title: From QCD to Dual Superconductivity to Effective String Theory

abstract:
  We show how an effective field theory of long distance QCD, describing a dual
superconductor, can be expressed as an effective string theory of
superconducting vortices. We use the semiclassical expansion of this effective
string theory about a classical rotating string solution in any spacetime
dimension D to obtain the semiclassical meson energy spectrum. We argue that
the experimental data on Regge trajectories along with numerical simulations of
the heavy quark potentials provide good evidence for an effective string
description of long distance QCD.


title: Higgs-Boson Production via Bottom-Quark Fusion

abstract:
  Higgs bosons with enhanced coupling to bottom quarks are copiously produced
at hadron colliders via b\bar{b} -> h, where the initial b quarks reside in the
proton sea. We revisit the calculation of the next-to-leading-order cross
section for this process and argue that the appropriate factorization scale for
the b distribution functions is approximately m_h/4, rather than m_h, as had
been previously assumed. This greatly improves the convergence of the
perturbation series, and yields a result with mild factorization-scale
dependence. We also show that the leading-order calculation of gg -> b\bar{b}h,
integrated over the momenta of the final-state particles, is very sensitive to
the factorization and renormalization scales. For scales of order m_h/4 the gg
-> b\bar{b}h cross section is comparable to that of b\bar{b} -> h, in contrast
to the order-of-magnitude discrepancy between these two calculations for the
scale m_h. The result we obtain improves the prospects for Higgs-boson
discovery at hadron colliders for large values of tan(\beta).


title: Renormalization Group Approach to the SUSY Flavor Problem

abstract: Renormalization group approach to the SUSY flavor problem is elucidated.


title: Anomaly Matching and Low Energy Theories at High Matter Density

abstract:
  I provide new arguments supporting the validity of the t'Hooft anomaly
conditions at non zero quark chemical potential. These constraints strengthen
the quark-hadron continuity scenario. Finally I review the 2SC effective
Lagrangian for color superconductivity.


title: Adaptive channels for data analysis and importance sampling

abstract:
  The adaptive multi-channel method is applied to derive probability
distributions from data samples. Moreover, an explicit algorithm is introduced,
for which both the channel weights and the channels themselves are adaptive,
and which can be used both for data analysis and for importance sampling in
Monte Carlo integration. Finally, it is pointed out how the usefulness for data
analysis can be used to optimize the integration procedure.


title: NAHE-based string models with SU(4) X SU(2) X U(1) SO(10) Subgroup

abstract:
  The orbifold GUT doublet-triplet splitting mechanism was discussed in 1994 in
the framework of the NAHE-based free fermionic models in which the SO(10) GUT
symmetry is broken to SO(6) X SO(4), SU(3) X SU(2) X U(1)^2, or SU(3) X U(1) X
SU(2)^2. In this paper we study NAHE-based free fermionic models in which the
SO(10) symmetry is broken at the string level to SU(4) X SU(2) X U(1). In
addition to the doublet-triplet splitting this case also has the advantage of
inducing the doublet-doublet splitting already at the string level. We
demonstrate, however, that NAHE-based models with SU(4) X SU(2) X U(1) SO(10)
subgroup are not viable. We show that, similarly to the LRS models, and in
contrast to the FSU5, PS and SLM models, the SU421 case gives rise to models
without an anomalous U(1) symmetry, and discuss the different cases in terms of
their N=4 origins.


title: The gluonic B and J/psi decays into the eta' meson

abstract:
  The inclusive and exclusive B decays into the eta' meson plus others are
investigated in a model based on the QCD anomaly. The invariant mass
distribution is discussed. The constraint of the effective coupling is obtained
from the data of the exclusive decay modes. The branching ratio of J/psi ->
eta'eta gamma is predicted to be as large as 5.4*10^{-5}, which can be tested
in the forthcoming CLEO-c experiments.


title: TeV resonances in top physics at the LHC

abstract:
  We consider the possibility of studying novel particles at the TeV scale with
enhanced couplings to the top quark via top quark pair production at the LHC
and VLHC. In particular we discuss the case of neutral scalar and vector
resonances associated with a strongly interacting electroweak symmetry breaking
sector. We constrain the couplings of these resonances by imposing appropriate
partial wave unitarity conditions and known low energy constraints. We evaluate
the new physics signals via WW -> tt~ for various models without making
approximation for the initial state W bosons, and optimize the acceptance cuts
for the signal observation. We conclude that QCD backgrounds overwhelm the
signals in both the LHC and a 200 TeV VLHC, making it impossible to study this
type of physics in the tt~ channel at those machines.


title: Phenomenology of the Little Higgs Model

abstract:
  We study the low energy phenomenology of the little Higgs model. We first
discuss the linearized effective theory of the "littlest Higgs model" and study
the low energy constraints on the model parameters. We identify sources of the
corrections to low energy observables, discuss model-dependent arbitrariness,
and outline some possible directions of extensions of the model in order to
evade the precision electroweak constraints. We then explore the characteristic
signatures to test the model in the current and future collider experiments. We
find that the LHC has great potential to discover the new SU(2) gauge bosons
and the possible new U(1) gauge boson to the multi-TeV mass scale. Other states
such as the colored vector-like quark T and doubly-charged Higgs boson Phi^{++}
may also provide interesting signals. At a linear collider, precision
measurements on the triple gauge boson couplings could be sensitive to the new
physics scale of a few TeV. We provide a comprehensive list of the linearized
interactions and vertices for the littlest Higgs model in the appendices.