title:
Uncertainties of the CJK 5 Flavour LO Parton Distributions in the Real
  Photon

abstract:
  Radiatively generated, LO quark (u,d,s,c,b) and gluon densities in the real,
unpolarized photon, calculated in the CJK model being an improved realization
of the CJKL approach, have been recently presented. The results were obtained
through a global fit to the experimental F2^gamma data. In this paper we
present, obtained for the very first time in the photon case, an estimate of
the uncertainties of the CJK parton distributions due to the experimental
errors. The analysis is based on the Hessian method which was recently applied
in the proton parton structure analysis. Sets of test parametrizations are
given for the CJK model. They allow for calculation of its best fit parton
distributions along with F2^gamma and for computation of uncertainties of any
physical value depending on the real photon parton densities. We test the
applicability of the approach by comparing uncertainties of example
cross-sections calculated in the Hessian and Lagrange methods. Moreover, we
present a detailed analysis of the chi^2 of the CJK fit and its relation to the
data. We show that large chi^2/DOF of the fit is due to only a few of the
experimental measurements. By excluding them chi^2/DOF approx 1 can be
obtained.


title:
Toward understanding the lattice QCD results from the strong coupling
  analysis

abstract:
  This is a review of strong coupling approaches to grasp the nature of the
phase transition in finite temperature and density QCD. We commence with
classics of the center symmetry and the Polyakov loop in pure gauge theories.
The effective action derived in the strong coupling limit gives qualitatively
plausible behavior for the deconfinement transition at finite temperature. We
can apply the strong coupling analysis to describe the chiral phase transition
with the help of large dimensional expansion. In order to make this article as
self-contained as possible, we elucidate the computational procedure and its
physical meaning in detail. Also the relation between the Polyakov loop
behavior and the chiral dynamics, the phase structure of two-color QCD, and
future possibilities to be pursued in the strong coupling analysis are
discussed.


title: Curvaton paradigm can accommodate multiple low inflation scales

abstract:
  Recent arguments show that some curvaton field may generate the cosmological
curvature perturbation. As the curvaton is independent of the inflaton field,
there is a hope that the fine-tunings of inflation models can be cured by the
curvaton scenario. More recently, however, D.H.Lyth discussed that there is a
strong bound for the Hubble parameter during inflation even if one assumes the
curvaton scenario. Although the most serious constraint was evaded, the bound
seems rather crucial for many models of a low inflation scale. In this paper we
try to remove this constraint. We show that the bound is drastically modified
if there were multiple stages of inflation.


title:
Scattering of high-energy partons off ultrasoft gluon fluctuations in
  hot QCD plasma and energy losses

abstract:
  Within the framework of the effective theory for ultrasoft field modes a
problem of interacting an energetic color particle with ultrasoft fluctuations
in hot gluon plasma is considered. The procedure of calculation of certain
effective current generating the process of interaction is proposed, and the
problem of its gauge independence is discussed. The application of the theory
developed to the problem of energy losses of the energetic color particle
propagating through hot QCD-medium is given. It is shown that the perturbation
approach for calculation of energy losses breaks down at the ultrasoft momentum
scale of plasma excitations.


title: Flavor and Little Higgs

abstract:
  We discuss the proper starting point to look into flavor physics under the
perspective of solving the hierarchy problem with the little Higgs mechanism --
the construction of anomaly free fermionic spectra of the effective theory of
extended electroweak gauge symmetry around the TeV scale. Anomaly cancellations
among the three SM families, plus extra fermions, are typically needed, giving
family non-universal flavor structures. Such a completed and consistent
fermionic spectrum supplements a scalar sector little Higgs model, turning the
latter into a realistic model the phenomenological viability of which can then
be investigated. The implications for flavor physics are specially interesting.
We give more elaborated discussion here on our basic perspective, trying to
clarify on issues that are in our opinion under-appreciated. We also add a
brief comment of little Higgs versus supersymmetry.


title: Rotating Black Holes/Rings at Future Colliders

abstract:
  The hierarchy between the electroweak and Planck scales can be reduced when
the extra dimensions are compactified with large volume or with warped
geometry, resulting in the fundamental scale of the order of TeV. In such a
scenario, one can experimentally study the physics above the Planck scale. We
discuss black hole/ring production at future colliders.


title:
Determination of the Structure of the High Energy Hadron Elastic
  Scattering at Small Angles

abstract:
  A new method for the determination of the real part of the elastic scattering
amplitude is examined for high energy proton-proton and proton-nuclei elastic
scattering at small momentum transfer. This method allows to decrease the
number of model assumptions, to obtain the real part in the narrow region of
momentum transfer and to test different models for hadron-nuclei scattering.


title:
Virtual- and bremsstrahlung corrections to b -> d l+ l- in the standard
  model

abstract:
  We present the calculation of the virtual- and bremsstrahlung corrections of
O(alpha_s) to the matrix elements <d l+ l-|O_i|b>. This is the missing piece in
the NNLL results for various observables associated with the process B-> X_d l+
l-, like the branching ratio, the CP-rate asymmetry and the forward-backward
asymmetry. This paper is an extension of analogous calculations done by some of
us for the process B-> X_s l+ l-. As the contributions of the diagrams induced
by the operators O_1^u and O_2^u with a u-quark running in the quark loop are
strongly CKM suppressed, they were omitted in the analysis of B->X_s l+ l-.
This is no longer possible for B-> X_d l+ l-, as the corresponding
contributions are not suppressed. The main new work therefore consists of
calculating the O(alpha_s) corrections to <d l+ l-|O_{1,2}^u|b>. In this paper
we restrict ourselves to the range 0.05 < s/m_b^2 < 0.25 (s is the invariant
mass of the lepton pair), which lies above the rho- and omega-resonances and
below the J/psi-resonance. We present the analytic results for the mentioned
observables related to the process B-> X_d l+ l- as expansions in the small
parameters s/m_b^2, z = m_c^2/m_b^2 and s/(4 m_c^2). In the phenomenological
analysis at the end of the paper we discuss the impact of the NNLL corrections
on the observables mentioned above.


title: Axions

abstract:
  I review the physics of axions, paying attention to the role as dark matter.
This paper is based on talks given at the workshops ``Thinking, Observing and
Mining the Universe'' held in Sorrento (Italy), September 22-27, 2003, and at
``International Workshop on Astroparticle and High Energy Physics'' held in
Valencia (Spain) October 14-18, 2003.


title: Neutrino mass limits from SDSS, 2dFGRS and WMAP

abstract:
  We investigate whether cosmological data suggest the need for massive
neutrinos. We employ galaxy power spectrum measurements from the Sloan Digital
Sky Survey (SDSS) and the Two Degree Field Galaxy Redshift Survey (2dFGRS),
along with cosmic microwave background (CMB) data from the Wilkinson Microwave
Anisotropy Probe (WMAP) and 27 other CMB experiments. We also use the
measurement of the Hubble parameter from the Hubble Space Telescope (HST) Key
Project. We find the sum of the neutrino masses to be smaller than 0.75 eV at
2\sigma (1.1 eV at 3\sigma).


title: Recent results from CCFM evolution

abstract:
  Recent developments of the small $x$ CCFM evolution are described, including
improvements of the splitting function. The resulting unintegrated gluon
densities are used for predictions of hadronic final state measurements like
jet production at HERA and heavy quark production at the Tevatron.


title: The triple collinear limit of one-loop QCD amplitudes

abstract:
  We consider the singular behaviour of one-loop QCD matrix elements when
several external partons become simultaneously parallel. We present a new
factorization formula that describes the singular collinear behaviour directly
in colour space. The collinear singularities are embodied in
process-independent splitting matrices that depend on the momenta, flavours,
spins and colours of the collinear partons. We give the general structure of
the infrared and ultraviolet divergences of the one-loop splitting matrices. We
also present explicit one-loop results for the triple collinear splitting, $q
\to q {\bar Q} Q$, of a quark and a quark--antiquark pair of different
flavours. The one-loop triple collinear splitting is one of the ingredients
that can be used to compute the evolution of parton distributions at the
next-to-next-to-leading order in QCD perturbation theory.


title: Neutrino oscillation physics with a higher $\gamma$ $\beta$-beam

abstract:
  The precision measurement and discovery potential of a neutrino factory based
on a storage ring of boosted radioactive ions ($\beta$-beam) is re-examined. In
contrast with past designs, which assume ion $\gamma$ factors of $\sim 100$ and
baselines of L=130 km, we emphasize the advantages of boosting the ions to
higher $\gamma$ and increasing the baseline proportionally. In particular, we
consider a medium-$\gamma$ scenario ($\gamma \sim 500$, L=730 km) and a
high-$\gamma$ scenario ($\gamma \sim 2000$, L = 3000 km).The increase in
statistics, which grow linearly with the average beam energy, the ability to
exploit the energy dependence of the signal and the sizable matter effects at
this longer baseline all increase the discovery potential of such a machine
very significantly.


title: SUSY Parameter Determination in Combined Analyses at LHC/LC

abstract:
  We demonstrate how the interplay of a future e^+e^- LC at its first stage
with sqrt{s} sim 500 GeV and of the LHC could lead to a precise determination
of the fundamental SUSY parameters in the gaugino/higgsino sector without
assuming a specific supersymmetry breaking scheme. We demonstrate this for the
benchmark scenario SPS1a, taking into account realistic errors for the masses
and cross sections measured at the LC with polarised beams, including errors
coming from polarisation measurements, and mass measurements at the LHC. The
results clearly demonstrate the complementarity of the LHC and LC, and the
benefit from the joint analyses of their data.


title: Photoproduction of isolated photons, single hadrons and jets at NLO

abstract:
  The photoproduction of large-p_T charged hadrons and of prompt photons is
discussed, for the inclusive case and with an associated jet, using predictions
from the NLO partonic Monte Carlo program EPHOX. Comparisons to recent HERA
data are also shown.


title: Oscillating Hadron and Jet Multiplicity Moments

abstract:
  Recently, the moments of multiplicity distributions in e+e- annihilation and
the ratios H_q (cumulant over factorial moments K_q/F_q) have been determined
both for the hadronic final state and for jets at variable resolution. These
ratios show an oscillatory behaviour as function of q with strong dependence of
the amplitude and length of oscillation on the jet resolution parameter
y_{cut}. The recent explanation of this phenomenon based on perturbative QCD
calculations is discussed.


title: Clone flow analysis for a theory inspired Neutrino Experiment planning

abstract:
  The presence of several clone solutions in the simultaneous measurement of
($\theta_{13},\delta$) has been widely discussed in literature. In this letter
we write the analytical formulae of the clones location in the
($\theta_{13},\delta$) plane as a function of the physical input pair
($\bar\theta_{13},\bar\delta$). We show how the clones move with changing
$\bar\theta_{13}$. The "clone flow" can be significantly different if computed
(naively) from the oscillation probabilities or (exactly) from the
probabilities integrated over the neutrino flux and cross-section.
  Using our complete computation we compare the clone flow of a set of possible
future neutrino experiments: the CERN SuperBeam, BetaBeam and Neutrino Factory
proposals. We show that the combination of these specific BetaBeam and
SuperBeam does not help in solving the degeneracies. On the contrary, the
combination of one of them with the Neutrino Factory Golden and Silver channel
can be used, from a theoretical point of view, to solve completely the
eightfold degeneracy.


title: Probing Neutrino Parameters at Accelerators

abstract:
  The simplest unified extension of the Minimal Supersymmetric Standard Model
with bilinear R--Parity violation provides a predictive scheme for neutrino
masses which can account for the observed atmospheric and solar neutrino
parameters. Despite the smallness of neutrino masses R-parity violation is
observable at present and future high-energy colliders, providing an
unambiguous cross-check of the model.


title: Pentaquark Magnetic Moments In Different Models

abstract:
  We calculate the magnetic moments of the pentaquark states from different
models and compare our results with predictions of other groups.


title: Covariant Light-Front Approach for s-wave and p-wave Mesons

abstract:
  We study the decay constants and form factors of the ground-state s-wave and
low-lying p-wave mesons within a covariant light-front approach. Numerical
results of the B to D** transition form factors, where D** denotes generically
a p-wave charmed meson, are compared with other model calculations. Predictions
on the decay rates for Bbar to D** pi, D** rho, Dbar**_s D* by using these
decay constants and form factors are in agreement with the experimental data.
The universal Isgur-Wise functions, xi, tau_{1/2}, tau_{3/2} are obtained and
are used to test the Bjorken and Uraltsev sum rules.


title: Can Supersymmetry Naturally Explain the Positron Excess?

abstract:
  It has often been suggested that the cosmic positron excess observed by the
HEAT experiment could be the consequence of supersymmetric dark matter
annihilating in the galactic halo. Although it is well known that evenly
distributed dark matter cannot account for the observed excess, if substantial
amounts of local dark matter substructure are present, the positron flux would
be enhanced, perhaps to the observed magnitude. In this paper, we attempt to
identify the nature of the substructure required to match the HEAT data,
including the location, size and density of any local dark matter clump(s).
Additionally, we attempt to assess the probability of such substructure being
present. We find that if the current density of neutralino dark matter is the
result of thermal production, very unlikely ($\sim 10^{-4}$ or less) conditions
must be present in local substructure to account for the observed excess.


title: Topics in CP Violation

abstract:
  I briefly review some results and open questions in the analysis of CP
violation in the B sector.


title: Nonperturbative scalar-meson resonances with open charm and beauty

abstract:
  We predict several new bound states and resonances for B-pion, B-Kaon, and
B-D S-wave elastic scattering, within the same model which was recently
employed to explain the D*sJ(2317)+ meson. In the charm-nonstrange sector we
find a (virtual ?) bound state close to the B-pion threshold, and moreover two
nearby resonances of comparable width in the range 5.9 to 6.1 GeV. We obtain
bound states B*s0(5570) in b-sbar and B*c0(6490) in bbar-c, as well as
resonances at higher energies. No JP=0+ states are found at 5.6 GeV (in
bbar-u/d), at 5.7 GeV (in b-sbar), or at 6.1 GeV (in bbar-c), where they are
predicted from pure confinement.


title: Quantum Field Theoretical Treatment of Neutrino Oscillations

abstract:
  The quantum field theoretical treatment of neutrino oscillations is
formulated. The procedure how to calculate the transition probability of one
type neutrino into another is briefly outlined.


title: The QCD equation of state and quark star properties

abstract:
  We review our quasiparticle model for the thermodynamics of strongly
interacting matter at high temperature, and its extrapolation to non-zero
chemical potential. Some implications of the resulting soft equation of state
of quark matter at low temperatures are pointed out.


title:
Updated dispersion-theoretical analysis of the nucleon electromagnetic
  form factors

abstract:
  In the light of the new data on the various neutron and proton
electromagnetic form factors taken in recent years, we update the
dispersion-theoretical analysis of the nucleon electromagnetic form factors
from the mid-nineties. The parametrization of the spectral functions includes
constraints from unitarity, perturbative QCD, and recent measurements of the
neutron charge radius. We obtain a good description of most modern form factor
data, with the exception of the Jefferson Lab data on G_E^p/G_M^p in the
four-momentum transfer range Q^2=3...6 GeV^2. For the magnetic radii of the
proton and the neutron we find r_M^p = 0.857 fm and r_M^n = 0.879 fm, which is
consistent with the recent determinations using continued fraction expansions.


title:
Electroproduction of a light neutral vector meson at next-to-leading
  order

abstract:
  The process of a light neutral vector meson electroproduction is studied in
the framework of QCD factorization in which the amplitude factorizes in a
convolution of the nonperturbative meson distribution amplitude and the
generalized parton densities with the perturbatively calculable hard-scattering
amplitudes. We derive a complete set of hard-scattering amplitudes at
next-to-leading order (NLO) for the production of vector mesons, $V=\rho^0,
\omega, \phi$.


title: A Method to Unambiguously Determine the Parity of the Theta+ Pentaquark

abstract:
  With the recent discovery of the $\Theta(1540)$ pentaquark, the question of
its parity is paramount since this will constrain the correct description of
its internal structure. We show that the measurement of the spin singlet and
triplet cross sections for the reaction $\vec{p}\vec{p} \to \Sigma^+ \Theta^+$
will unambiguously determine the parity of the $\Theta^+$.


title:
NLO QCD procedure of the SIDIS data analysis with respect to light quark
  polarized sea

abstract:
  The semi-inclusive deep inelastic scattering (SIDIS) process is considered.
It is proposed a theoretical procedure allowing the direct extraction from the
SIDIS data of the first moments of the polarized valence distributions and of
the first moment difference of the light sea quark polarized distributions in
the next to leading (NLO) QCD order. The validity of the procedure is confirmed
by the respective simulations.


title:
Renormalization of \Phi-derivable approximations in scalar field
  theories

abstract:
  We discuss the renormalization of \Phi-derivable approximations for scalar
field theories. In such approximations, the self-energy is obtained as the
solution of a self-consistent equation which effectively resums infinite
subsets of diagrams of perturbation theory. We show that a consistent
renormalization can be carried out, and we provide an explicit construction of
the counterterms needed to eliminate the subdivergences. The counterterms are
calculated from the solution of an auxiliary gap equation which determines the
leading asymptotic part of the self-energy. This auxiliary gap equation may be
chosen as the gap equation of the massless theory at zero temperature. We
verify explicitly that the counterterms determined at zero temperature are
sufficient to eliminate the divergences which occur in finite temperature
calculations.


title: $M(\eta_b)$ and $\alpha_s$ from Nonrelativistic Renormalization Group

abstract:
  We sum up the next-to-leading logarithmic corrections to the heavy-quarkonium
hyperfine splitting using the nonrelativistic renormalization group. On the
basis of this result, we predict the mass of the $\eta_b$ meson to be
$M(\eta_b)=9419 \pm 11 {(\rm th)} {}^{+9}_{-8} (\delta\alpha_s) MeV$. The
experimental measurement of $M(\eta_b)$ with a few MeV error would be
sufficient to determine $\alpha_s(M_Z)$ with an accuracy of $\pm 0.003$. The
use of the nonrelativistic renormalization group is mandatory to reproduce the
experimental value of the hyperfine splitting in charmonium.


title: Looking for nonstandard CP violation in B^\pm -> D_s^\pm D^0 pi^0 decays

abstract:
  We study the possibility of measuring nonstandard CP violation effects
through Dalitz plot analysis in B^\pm -> D_s^\pm D^0 pi^0 decays. The accuracy
in the extraction of CP violating phases is analyzed by performing a Monte
Carlo simulation of the decays, and the magnitude of possible new physics
effects is discussed. It is found that this represents a hopeful scenario for
the search of new physics.


title:
T-\mu phase diagram of the chiral quark model from a large flavor number
  expansion

abstract:
  The chiral phase boundary of strong matter is determined in the T-\mu plane
from the chiral quark model, applying a non-perturbatively renormalised
treatment, involving chains of pion-bubbles and 1-loop fermion contributions.
In the absence of explicit symmetry breaking the second order portion of the
phase boundary and the location of the tricritical point (TCP) are determined
analytically. Sensitivity of the results to the renormalisation scale is
carefully investigated. The softening of the sigma-pole near the second order
transitions is confirmed.


title: Simplest Validation of the HIJING Monte Carlo Model

abstract:
  Fulfillment of the energy-momentum conservation law, as well as the charge,
baryon and lepton number conservation is checked for the HIJING Monte Carlo
program in $pp$-interactions at $\sqrt{s}=$ 200, 5500, and 14000 GeV. It is
shown that the energy is conserved quite well. The transverse momentum is not
conserved, the deviation from zero is at the level of 1--2 GeV/c, and it is
connected with the hard jet production. The deviation is absent for soft
interactions.
  Charge, baryon and lepton numbers are conserved.
  Azimuthal symmetry of the Monte Carlo events is studied, too. It is shown
that there is a small signature of a "flow". The situation with the symmetry
gets worse for nucleus-nucleus interactions.


title:
Complete NNLO QCD Analysis of B -> X_s l^+ l^- and Higher Order
  Electroweak Effects

abstract:
  We complete the next-to-next-to-leading order QCD calculation of the
branching ratio for B -> X_s l^+ l^- including recent results for the
three-loop anomalous dimension matrix and two-loop matrix elements. These new
contributions modify the branching ratio in the low-q^2 region, BR_ll, by about
+1% and -4%, respectively. We furthermore discuss the appropriate normalization
of the electromagnetic coupling alpha and calculate the dominant higher order
electroweak effects, showing that, due to accidental cancellations, they change
BR_ll by only -1.5% if alpha(mu) is normalized at mu = O(m_b), while they shift
it by about -8.5% if one uses a high scale normalization mu = O(M_W). The
position of the zero of the forward-backward asymmetry, q_0^2, is changed by
around +2%. After introducing a few additional improvements in order to reduce
the theoretical error, we perform a comprehensive study of the uncertainty. We
obtain BR_ll(1 GeV^2 <= q^2 <= 6 GeV^2) = (1.57 +- 0.16) x 10^-6 and q_0^2 =
(3.76 +- 0.33) GeV^2 and note that the part of the uncertainty due to the
b-quark mass can be easily reduced.


title: Desperately Seeking the Standard Model

abstract:
  In the mid eighties string phenomenology started. Since then, its main
objective, the search of the standard model, has not been accomplished yet. In
this talk, on the ocassion of the 2nd International Conference on String
Phenomenology in 2003, I will review this crucial issue.


title:
Two-loop scalar self-energies in a general renormalizable theory at
  leading order in gauge couplings

abstract:
  I present results for the two-loop self-energy functions for scalars in a
general renormalizable field theory, using mass-independent renormalization
schemes based on dimensional regularization and dimensional reduction. The
results are given in terms of a minimal set of loop-integral basis functions,
which are readily evaluated numerically by computers. This paper contains the
contributions corresponding to the Feynman diagrams with zero or one vector
propagator lines. These are the ones needed to obtain the pole masses of the
neutral and charged Higgs scalar bosons in supersymmetry, neglecting only the
purely electroweak parts at two-loop order. A subsequent paper will present the
results for the remaining diagrams, which involve two or more vector lines.


title: Fundamental physics and Lorentz violation

abstract:
  The violation of Lorentz symmetry can arise in a variety of approaches to
fundamental physics. For the description of the associated low-energy effects,
a dynamical framework known as the Standard-Model Extension has been developed.
This talk gives a brief review of the topic focusing on Lorentz violation
through varying couplings.


title: Can MSSM Particle be the Inflaton?

abstract:
  We consider the possibility of using one of the $D$-flat directions in the
minimal supersymmetric standard model (MSSM) as the inflaton. We show that the
flat direction consisting of (first generation) left- and right-handed
up-squarks as well as the up-type Higgs boson may play the role of the inflaton
if dominant part of the up-quark mass is radiatively generated from
supersymmetric loop diagrams. We also point out that, if the R-parity violating
Yukawa coupling is of $O(10^{-7})$, $R$-odd $D$-flat directions may be another
possible candidate of the inflaton. Such inflation models using $D$-flat
directions in the MSSM are not only testable with collider experiments but also
advantageous to resolve the problem how the inflaton reheats the universe.


title:
Summary of the 2003 Moriond Workshop on Electroweak Interactions and
  Unified Theories

abstract:
  We recount some of the highlights of the 2003 Moriond Workshop on Electroweak
Interactions and Unified Theories.


title: Outlook: The Next Twenty Years

abstract:
  I present an outlook for the next twenty years in particle physics. I start
with the big questions in our field, broken down into four categories:
horizontal, vertical, heaven, and hell. Then I discuss how we attack the big
questions in each category during the next twenty years. I argue for a synergy
between many different approaches taken in our field.


title: Large electroweak penguin contribution in B --> K pi modes

abstract:
  I discuss about a possibility of large electroweak penguin contribution in B
--> K pi. To satisfy several relations among the branching ratios, we need
large electroweak penguin contribution. The magnitude is larger than the
theoretical estimation in the SM so that it may be including some new physics
effects.


title: Single and double seesaw for quark-lepton and neutrino masses

abstract:
  A left-right model of quarks and leptons based on the gauge group $SU(3)_c
\times SU(2)_L \times SU(2)_R \times U(1)_{B-L}$ is studied. Here the scalar
sector consists of only two doublets namely (1,2,1,1) and (1,1,2,1) but
familiar bidoublet (1,2,2,0) is removed. Quarks and charged leptons get mass
from a single see-saw mechanism but neutrinos get mass from a double see-saw
mechanism. In this type of models the heaviest right handed neutrino can be of
order $10^{13}$ GeVs or less in a natural way, depending on the size of related
Yukawa couplings.


title: Noncommutative Theory in Light of Neutrino Oscillation

abstract:
  Solar neutrino problem and atmospheric neutrino anomaly which are both
long-standing issues studied intensively by physicists in the past several
decades, are reckoned to be able to be solved simultaneously in the framework
of the assumption of the neutrino oscillation. For the presence of the Lorentz
invariance in the Standard Model, the massless neutrino can't have flavor
mixing and oscillation. However, we exploit the q-deformed noncommutative
theory to derive a general modified dispersion relation, which implies some
violation of the Lorentz invariance. Then it is found that the application of
the q-deformed dispersion relation to the neutrino oscillation can provide a
sound explanation for the current data from the reactor and long baseline
experiments.


title: Pathways to a clean gamma (phi3): From B to Super B-factories

abstract:
  The implementation of various methods for the determination of gamma through
direct CP violation arising in the interference of b->c and b->u processes in
charged as well as neutral B meson decays are considered. We show that the
inclusion of D0 resulting from D*0-->D0+pi0(gamma) say via B-->KD*0 makes a
significant difference in the attainable accuracy for gamma. Both exclusive and
inclusive decays of the B+- and B0 to states containing D0/D0-bar followed by
both inclusive and exclusive decays of the D0 are discussed. It is shown that
with statistics which might be obtained at B factories (5-10 X 10^8 B-pairs) a
1-sigma determination of gamma to about +-5 degrees may be possible depending
on the efficiency of reconstruction, backgrounds and the details of the decay
amplitudes involved. The role of data from a charm factory as well as effects
of D0 mixing are discussed. Extraction of gamma with accuracy that is roughly
commensurate with the intrinsic theory error of these methods (i.e. around
0.1%), which is an important goal, will require >10^{10} B-pairs, namely a
Super-B Factory.


title: CP violation in B --> phi K_S decay at large tan(beta)

abstract:
  We consider the chargino contribution to the CP violation in B \to \phi K_S
decay in the minimal supersymmetric standard model at large \tan\beta. It is
shown that the Wilson coefficient C_{8g} of the chromomagnetic penguin operator
can be significantly enhanced by the chargino-mediated diagrams while
satisfying other direct/indirect experimental constraints. The enhanced C_{8g}
allows large deviation in the CP asymmetry from the standard model prediction.


title:
Higher moments of nucleon spin structure functions in heavy baryon
  chiral perturbation theory and in a resonance model

abstract:
  The third moment $d_2$ of the twist-3 part of the nucleon spin structure
function $g_2$ is generalized to arbitrary momentum transfer $Q^2$ and is
evaluated in heavy baryon chiral perturbation theory (HBChPT) up to order
${\mathcal{O}}(p^4)$ and in a unitary isobar model (MAID). We show how to link
$d_2$ as well as higher moments of the nucleon spin structure functions $g_1$
and $g_2$ to nucleon spin polarizabilities. We compare our results with the
most recent experimental data, and find a good description of these available
data within the unitary isobar model. We proceed to extract the twist-4 matrix
element $f_2$ which appears in the $1/Q^2$ suppressed term in the twist
expansion of the spin structure function $g_1$ for proton and neutron.


title:
Dielectric Functions and Dispersion Relations of Ultra-Relativistic
  Plasmas with Collisions

abstract:
  In the present paper we calculate the dielectric functions of an
ultra-relativistic plasma, such as an electron-positron or a quark-gluon
plasma. We use classical transport theory and take into account collisions
within the relaxation time approximation. From these dielectric functions we
derive the dispersion relations of longitudinal and transverse plasma waves.

categories: hep-ph astro-ph nucl-th physics.plasm-ph


title: Structure of the Nucleon

abstract:
  Generalized parton distributions provide information on the longitudinal and
transverse distribution of partons in the fast moving nucleon. Furthermore,
they contain information on the spin structure of the nucleon. First results of
a lattice study of generalized parton distributions are presented.


title:
Primordial bound systems of superheavy particles as the source of
  ultra-high energy cosmic rays

abstract:
  Annihilation of superheavy particles in primordial bound systems is
considered as the source of Ultra High Energy Cosmic Rays (UHECR).Charge
conservation makes them to be produced in pairs, and the estimated separation
of particle and antiparticle in such pair is shown to be in some cases much
smaller than the average separation determined by the averaged number density
of considered particles. If the new U(1) charge is the source of a long range
field similar to electromagnetic field, the particle and antiparticle,
possessing that charge, can form primordial bound system with annihilation
timescale, which can satisfy the conditions, assumed for this type of UHECR
sources. These conditions severely constrain the possible properties of
considered particles. So, the proposed mechanism of UHECR origin is impossible
to realise, if the U(1) charged particles share ordinary weak, strong or
electromagnetic interactions. It makes the proposed mechanism of pairing and
binding of superheavy U(1) charged particles an effective theoretical tool in
the probes of the physics of very early Universe and of the hidden sector of
particle theory, underlying it.


title: Medium-Induced Gluon Radiation off Massive Quarks Fills the Dead Cone

abstract:
  We calculate the transverse momentum dependence of the medium-induced gluon
energy distribution radiated off massive quarks in spatially extended QCD
matter. In the absence of a medium, the distribution shows a characteristic
mass-dependent depletion of the gluon radiation for angles smaller than m/E,
the so-called dead cone effect. Medium-modifications of this spectrum are
calculated as a function of quark mass, initial quark energy, in-medium
pathlength and density. Generically, medium-induced gluon radiation is found to
fill the dead cone, but it is reduced at large gluon energies compared to the
radiation off light quarks. We quantify the resulting mass-dependence for
momentum-averaged quantities (gluon energy distribution and average parton
energy loss), compare it to simple approximation schemes and discuss its
observable consequences for nucleus-nucleus collisions at RHIC and LHC. In
particular, our analysis does not favor the complete disappearance of energy
loss effects from leading open charm spectra at RHIC.


title: Lepton Polarization in Neutrino-Nucleon Interactions

abstract:
  We derive generic formulas for the polarization density matrix of leptons
produced in neutrino and antineutrino collisions and briefly consider some
important particular cases. Next we employ the general formalism in order to
include the final lepton mass and spin into the popular model by Rein and
Sehgal for single pion neutrinoproduction.


title: Dijet rates with symmetric E_t cuts

abstract:
  We consider dijet production in the region where symmetric cuts on the
transverse energy, $E_t$, are applied to the jets. In this region
next-to--leading order calculations are unreliable and an all-order resummation
of soft gluon effects is needed, which we carry out. Although, for illustrative
purposes, we choose dijets produced in deep inelastic scattering, our general
ideas apply additionally to dijets produced in photoproduction or $\gamma
\gamma$ processes and should be relevant also to the study of prompt di-photon
$E_t$ spectra in association with a recoiling jet, in hadron-hadron processes


title: Shape function effects in B -> X_s gamma and B -> X_u l nu decays

abstract:
  We calculate the decay distributions for inclusive B -> X_s gamma and B ->
X_u l nu decays in the endpoint region, where radiative corrections are large.
The computation is done using effective field theory methods. The matching
coefficients are computed to O(alpha_s), and the anomalous dimensions to
next-to-leading order. The final expressions for the differential decay spectra
include the complete O(alpha_s) corrections, and sum the leading and
next-to-leading Sudakov series. We present results for regions of phase space
where the shape function can be expanded in local operators, and give the
matching coefficients of the resulting enhanced non-perturbative effects to
order alpha_s. We show that moments of the shape function {\it are not} given
by moments of local operators once perturbative effects are included, explain
why the shape function and its moments satisfy different renormalization group
equations, and contrast this with the situation for deep inelastic scattering.
We show that there are large perturbative corrections in the usual definition
of the shape function. This renders incorrect previous prescriptions for
combining radiative corrections with the shape function.


title:
Transport equations for chiral fermions to order \hbar and electroweak
  baryogenesis: Part I

abstract:
  This is the first in a series of two papers. We use the Schwinger-Keldysh
formalism to derive semiclassical Boltzmann transport equations for massive
chiral fermions and scalar particles. Our considerations include complex mass
terms and mixing fermion and scalar fields, such that CP-violation is naturally
included, rendering the equations particularly suitable for studies of
baryogenesis at a first order electroweak phase transition. In part II we
discuss the collision terms.


title:
Metrological constraints on the variability of the fundamental constants
  $e$, $\hbar$, and $c$

abstract:
  We set up a framework for a model-independent analysis of the time variation
of $e$, $\hbar$, and $c$ indiviually. It is shown that the time-evolution of
each constant can be determined uniquely from the time evolution of the fine
structure constant $\alpha$ provided that the choice of basic time-independent
units (i.e., the clock and ruler) is fixed. Realistic systems of units are
considered as examples and implications for metrology are discussed.


title:
Determination of polarized parton distribution functions and their
  uncertainties

abstract:
  We investigate the polarized parton distribution functions (PDFs) and their
uncertainties by using the world data on the spin asymmetry A_1. The
uncertainties of the polarized PDFs are estimated by the Hessian method. The up
and down valence-quark distributions are determined well. However, the
antiquark distributions have large uncertainties at this stage, and it is
particularly difficult to fix the gluon distribution. The \chi^2 analysis
produces a positively polarized gluon distribution, but even \Delta g(x)=0
could be allowed according to our uncertainty estimation. In comparison with
the previous AAC (Asymmetry Analysis Collaboration) parameterization in 2000,
accurate SLAC-E155 proton data are added to the analysis. We find that the E155
data improve the determination of the polarized PDFs, especially the polarized
antiquark distributions. In addition, the gluon-distribution uncertainties are
reduced due to the correlation with the antiquark distributions. We also show
the global analysis results with the condition \Delta g(x)=0 at the initial
scale, Q^2=1 GeV^2, for clarifying the error correlation effects with the gluon
distribution.


title: Inflationary attractor in Gauss-Bonnet brane cosmology

abstract:
  The inflationary attractor properties of the canonical scalar field and
Born-Infeld field are investigated in the Randall-Sundrum II scenario with a
Gauss-Bonnet term in the bulk action. We find that the inflationary attractor
property will always hold for both the canonical and Born-Infeld fields for any
allowed non-negative Gauss-Bonnet coupling. We also briefly discuss the
possibility of explaining the suppressed lower multiples and running scalar
spectral index simultaneously in the scenario of Gauss-Bonnet brane inflation.


title:
Hadronic Part of the Muon g-2 Estimated on the sigma_tot^2003(e+ e- -->
  hadrons) Evaluated Data Compilation

abstract:
  A comprehensive as of November 2003 and evaluated data compilation on
sigma_tot(e+ e- --> hadrons) was used to estimate the lowest order hadronic
contribution to the muon anomalous magnetic moment. The preliminary result is
a_mu(had, LO) = (699.6 +- 1.9(rad) +- 2.0(proc) +- 8.5(e+e-)) * 10^-10 The
Standard Model value of the muon magnetic anomaly calculated by updated SM
formulae published or e-printed by November 2003 then reads a_mu = (1 165 918
3.5 +- 8.7(had) +- 4.0(LbL) +- 0.3(QED) +- 0.2(EW)) * 10^-10. This result
deviates from the current experimental world average of a_mu by (-19.5 +-
9.6(theor) +- 8.0(exp)) * 10^-10, i.e. at 1.5 sigma level.


title: Top quark spin in ep collision

abstract:
  We discuss the degree of spin polarization of single top quarks produced via
$Wg$ fusion process in $ep$ collision at TESLA+HERAp and CLIC+LHC energies
$\sqrt{s}=1.6$ and 5.3 TeV. A description on how to combine the cross sections
of $e^{+}b\to t\bar{\nu}$ and $e^{+}g\to t\bar{b}\bar{\nu}$ processes is given.
$e^{+}$-beam direction is taken to be the favorite top quark spin decomposition
axis in its rest frame and it is found to be comparable with the ones in $pp$
collision. It is argued that theoretical simplicity and experimental clearness
are the advantage of $ep$ collision.


title: Muonic hydrogen ground state hyperfine splitting

abstract:
  Corrections of orders alpha^5, alpha^6 are calculated in the hyperfine
splitting of the muonic hydrogen ground state. The nuclear structure effects
are taken into account in the one- and two-loop Feynman amplitudes by means of
the proton electromagnetic form factors. The modification of the hyperfine
splitting part of the Breit potential due to the electron vacuum polarization
is considered. Total numerical value of the 1S state hyperfine splitting
182.638 meV in the (mu p) can play the role of proper estimation for the
corresponding experiment with the accuracy 30 ppm.


title: QCD tools for the LHC

abstract:
  This contribution provides a pedagogical introduction to and review of the
current status and ongoing progress in the development of Monte Carlo tools for
the calculation and simulation of high-Q^2 processes in hadronic collisions.


title: B -> phi K_S CP asymmetries as a probe of supersymmetry

abstract:
  We consider sparticle contributions to time dependent CP asymmetry in B ->
phi K_S. As for the gluino-squark loop, LR or RL insertion is more likely to
give recently observed S_{phi K} < 0 than LL or RR insertion. Neutral Higgs
contribution does not change S_{phi K} very much due to the strong constraint
from B_s -> mu^+ mu^-. We also show correlations among related processes such
as direct CP asymmetry in B -> X_s gamma and B_s - B_s bar mixing, and discuss
theoretical motivations for desired strength of flavor violation.


title:
Double Extensive Air Shower Induced by Ultra-High Energy Cosmic
  Tau-Neutrino

abstract:
  We investigate the possibility of detecting cosmic ultra-high energy
tau-neutrinos by means of a process involving a double extensive air shower,
the so-called Double-Bang Phenomenon. In this process a primary tau-neutrino
interacts with an atmospheric quark creating a first hadronic shower and a
tau-lepton, which subsequently decays creating a second cascade. The number of
these events strongly depends on the flux of tau-neutrinos arriving at the
Earth's atmosphere and can be used to test some theoretical models related to
the production of ultra-high energy tau-neutrinos. We estimate the potential of
the fluorescence detector of the Pierre Auger Observatory to observe
Double-Bang events. We conclude that for tau-neutrinos with energies ranging
from ~ 0.1 EeV to ~ 10 EeV the number of detected events vary from hundreds in
a year to only few events in hundreds of years.


title:
Prototype for an Undulator-based Source for Polarised Positrons:
  International Polarised Positron Collaboration: Project E-166

abstract:
  The full exploitation of the physics potential of a future Linear Collider
requires the development of polarised positron beams. A very promising scheme
for the technical realisation is the use of helical undulators, generating
circular polarised photons of several MeV which are then converted in a thin
target to longitudinally polarised positrons. The experiment E-166 tests this
scheme. It uses the low-emittance 50-GeV electron beam at the Final Focus Test
Beam (FFTB) at SLAC, passing through a 1 meter-long helical undulator. The flux
and polarisation of the undulator photons as well as the properties of the
positrons will be measured and will be compared with simulations.


title:
CP violation in polarized $b \to d l^+ l^-$: A Detailed Standard Model
  Analysis

abstract:
  The electroweak CP violating rate asymmetries in the decay $b \to d l^+ l^-$
are reexamined in detail and updated. In particular, the rate asymmetries are
studied when one of the final state leptons is polarised. We find an estimate
for the asymmetry of (5-15)% in the polarised decay spectrum which is close to
known results for the unpolarised case. Interestingly, in the region separating
the $\rho-\omega$ and $c \bar c$ resonances, which is also theoretically
cleanest, the polarised contribution to the asymmetry is larger than the
unpolarised result. A $3\sigma$ signal for direct CP violation, requires about
10^{10} $B \bar B$ pairs at a B factory. In general these results indicate an
asymmetric contribution from the individual polarisation states to the
unpolarised CP asymmetry; an atribute for any new physics searches.


title: Neutrino cosmology - an update

abstract:
  Present cosmological observations yield an upper bound on the neutrino mass
which is significantly stronger than laboratory bounds. However, the exact
value of the cosmological bound is model dependent and therefore less robust.
Here, I review the current status of cosmological neutrino mass bounds and also
discuss implications for sterile neutrinos and LSND in particular.


title:
Muon spectra of Quasi-Elastic and 1-pion production events at the KEK
  LBL neutrino oscillation experiment

abstract:
  We present predictions for the flux averaged muon energy spectra of
quasi-elastic (QE) and 1-pion production events for the K2K long-baseline
experiment. Using the general kinematical considerations we show that the muon
energy spectra closely follow the neutrino energy spectrum with downward shift
of the energy scale by 0.15 GeV (QE) and 0.4 GeV (1-pion production). These
predictions seem to agree with the observed muon energy spectra in the K2K
nearby detector. We also show the spectral distortion of these muon energy
spectra due to the neutrino oscillation for the SK detector. Comparison of the
predicted spectral distortions with the observed muon spectra of the 1-Ring and
2-Ring muon events in the SK detector will help to determine the oscillation
parameters. The results will be applicable to other LBL experiments as well.


title: Quark-Mixing, CKM-Unitarity

abstract:
  With these proceedings, we present both a review of the experimental and
theoretical information on quark-mixing with focus on the first quark
generation. The papers present new findings on these topics in the context of
what is known so far. Besides this, about half a dozen new neutron-decay
instruments being planned or under construction are presented. Better neutron
sources, in particular for high fluxes of cold and high densities of ultra-cold
neutrons will boost fundamental studies in these fields. The workshop included
invited talks and a panel discussion. The results of the panel discussion are
published in "The European Physical Journal".


title: Probing the partonic structure of pentaquarks in hard electroproduction

abstract:
  Exclusive electroproduction of a K or K* meson on the nucleon can give a
Theta+ pentaquark in the final state. This reaction offers an opportunity to
investigate the structure of pentaquark baryons at parton level. We discuss the
generalized parton distributions for the N-->Theta+ transition and give the
leading order amplitude for electroproduction in the Bjorken regime. Different
production channels contain complementary information about the distribution of
partons in a pentaquark compared with their distribution in the nucleon.
Measurement of these processes may thus provide deeper insight into the very
nature of pentaquarks.


title:
Covariant derivative expansion of fermionic effective action at high
  temperatures

abstract:
  We derive the fermionic contribution to the 1-loop effective action for A_4
and A_i fields at high temperatures, assuming that gluon fields are slowly
varying but allowing for an arbitrary amplitude of A_4.


title: Medium-induced gluon radiation and jet quenching in heavy ion collisions

abstract:
  In this brief review, I summarize the new developments on the description of
gluon radiation by energetic quarks traversing a medium as well as the
observable consequences in high-energy heavy ion collisions. Information about
the initial state is essential for a reliable interpretation of the
experimental results and will also be reviewed. Comparison with experimental
data from RHIC and expectation for the future LHC will be given.


title:
The rare decay B --> X_s l^+ l^- to NNLL precision for arbitrary
  dilepton invariant mass

abstract:
  We present a new phenomenological analysis of the inclusive rare decay $B \to
X_s \ell^+\ell^-$. In particular, we present the first calculation of the NNLL
contributions due to the leading two-loop matrix elements, evaluated for
arbitrary dilepton invariant mass. This allows to obtain the first NNLL
estimates of the dilepton mass spectrum and the lepton forward-backward
asymmetry in the high $ M^2_{\ell^+ \ell^-}$ region, and to provide an
independent check of previously published results in the low $ M^2_{\ell^+
\ell^-}$ region. The numerical impact of these NNLL corrections in the
high-mass region ($ M^2_{\ell^+ \ell^-} > 14.4 GeV^2$) amounts to -13% in the
integrated rate, and leads to a reduction of the scale uncertainty to $\pm 3%$.
The impact of non-perturbative contributions in this region is also discussed
in detail.


title: The FCNC top-squark decay as a probe of squark mixing

abstract:
  In supersymmetry (SUSY) the flavor mixing between top-squark (stop) and
charm-squark (scharm) induces the flavor-changing neutral-current (FCNC) stop
decay $\tilde t_1 \to c \tilde \chi^0_1$. Searching for this decay serves as a
probe of soft SUSY breaking parameters. Focusing on the stop pair production
followed by the FCNC decay of one stop and the charge-current decay of the
other stop, we investigate the potential of detecting this FCNC stop decay at
the Fermilab Tevatron, the CERN Large Hadron Collider (LHC) and the
next-generation $e^+e^-$ linear collider (LC). We find that this decay may not
be accessible at the Tevatron, but could be observable at the LHC and the LC
with high sensitivity.


title: Operator Product Expansion and Quark-Hadron Duality: Facts and Riddles

abstract:
  We review the status of the practical operator product expansion (OPE), when
applied to two-point correlators of QCD currents which interpolate to mesonic
resonances, in view of the violations of local quark-hadron duality. Covered
topics are: a mini-review of mesonic QCD sum rules in vacuum, at finite
temperature, or at finite baryon density, a comparison of model calculations of
current-current correlation functions in 2D and 4D with the OPE expression, a
discussion of meson distribution amplitudes in the light of nonperturbatively
nonlocal modifications of the OPE, and a reorganization of the OPE which
(partially) resums powers of covariant derivatives.


title: Unified Graphical Summary of Neutrino Mixing Parameters

abstract:
  The neutrino mixing parameters are presented in a number of different ways by
the various experiments, e.g. SuperKamiokande, K2K, SNO, KamLAND and Chooz and
also by the Particle Data Group. In this paper, we argue that presenting the
data in terms of $\sin^2 \theta$, where $\theta$ is the mixing angle
appropriate for a given experiment has a direct physical interpretation. For
current atmospheric, solar and reactor neutrino experiments, the $\sin^2
\theta$'s are effectively the probability of finding a given flavor in a
particular neutrino mass eigenstate. The given flavor and particular mass
eigenstate varies from experiment to experiment, however, the use of $\sin^2
\theta$ provides a unified picture of all the data. Using this unified picture
we present a graphical way to represent these neutrino mixing parameters which
includes the uncertainties. All of this is performed in the context of the
present experimental status of three neutrino oscillations.


title: QCD analysis of first b cross section data at 1.96 TeV

abstract:
  The first data on bottom quark production in p-pbar collisions at 1.96 TeV
have recently been obtained by the CDF collaboration. These data probe the
region of pt~0, providing a new invaluable input on the issue of the
compatibility between next-to-leading-order (NLO) QCD and data. We reconsider
the evaluation of the b cross section, in view of recent theoretical
developments, and of the latest inputs on structure function fits. We show that
the new CDF measurements are in good agreement with NLO QCD. If CDF preliminary
data are confirmed, a long-standing discrepancy between NLO QCD predictions and
hadron-collider data can be settled.


title:
The thermal heat kernel expansion and the one-loop effective action of
  QCD at finite temperature

abstract:
  The heat kernel expansion for field theory at finite temperature is
constructed. It is based on the imaginary time formalism and applies to generic
Klein-Gordon operators in flat space-time. Full gauge invariance is manifest at
each order of the expansion and the Polyakov loop plays an important role at
any temperature. The expansion is explicitly worked out up to operators of
dimension six included. The method is then applied to compute the one loop
effective action of QCD at finite temperature with massless quarks. The
calculation is carried out within the background field method in the
$\bar{\text{MS}}$ scheme up to dimension six operators. Further, the action of
the dimensionally reduced effective theory at high temperature is also computed
to the same order. Existing calculations are reproduced and new results are
obtained in the quark sector for which only partial results existed up to
dimension six.


title:
The Gauge Dependence of the Imaginary Part of physical amplitude
  $W^{+}\to u_i \bar{d}_j$ in CKM Matrix Renormalization

abstract: This manuscript has been withdrawn due to some default.


title:
SUSY-electroweak one-loop contributions to Flavour-Changing Higgs-Boson
  Decays

abstract:
  The SUSY-EW one-loop quantum contributions to flavour-changing MSSM
Higgs-boson decays into $b \bar s$ and $s \bar b$ are computed and discussed.
We use the full diagrammatic approach that is valid for all $\tan \beta$ values
and do not rely on the mass-insertion approximation for the characteristic
flavour-changing parameter. We analyze in full detail the dependence of these
flavour-changing partial widths on all the relevant MSSM parameters and also
study the non-decoupling behaviour of these widths with the SUSY mass
parameters. We find that these contributions are sizable as compared to the SM
ones, and together with the SUSY-QCD contributions they can be very efficient
as an indirect method in the future search for Supersymmetry.


title:
Information theory in high energy physics (extensive and nonextensive
  approach)

abstract:
  The application of information theory approach (both in its extensive and
nonextensive versions) to high energy multiparticle processes is discussed and
confronted with experimental data on e+e- annihilation processes, pp and
\bar{p}p scatterings and heavy ion collisions.


title: Heavy quarks in deeply virtual Compton scattering

abstract:
  A detailed study of the heavy quark h=c,b,... contributions to deeply virtual
Compton scattering is performed at both the amplitude and the cross section
level, and their phenomenological relevance is discussed. For this purpose I
calculate the lowest order off-forward photon-gluon scattering amplitude with a
massive quark loop and the corresponding hard scattering coefficients. In a
first numerical analysis these fixed order perturbation theory results are
compared with the conventional intrinsic "massless" parton approach considering
generalized parton distributions for the heavy quarks. The differences between
these two prescriptions can be quite significant, especially at small
skewedness where the massless approach largely overestimates the deeply virtual
Compton scattering cross section.


title: Neutrino Phenomenology -- the case of two right handed neutrinos

abstract:
  We make a general analysis of neutrino phenomenology for the case neutrino
masses are generated by the see-saw mechanism with just two right handed
neutrinos. We find general constraints on leptogenesis and lepton flavour
violating processes. We also analyse the predictions following from a
nontrivial texture zero structure.


title:
A New Class of Solutions to the Strong CP Problem with a Small Two-Loop
  theta

abstract:
  We present a new class of models which produce zero theta (QCD} angle at the
tree and one-loop level due to hermiticity of sub-blocks in the extended quark
mass matrices. The structure can be maintained typically by non-abelian
generation symmetry. Two examples are given for this class of solutions.


title:
Study of selectron properties in the e~ e~ -> e- X_1^0 e- X_2^0 decay
  channel

abstract:
  We discuss selectron pair production in e- e- scattering, in the processes e-
e- -> e~_L e~_L, e~_R e~_R -> e- X_1^0 e- X_2^0 -> e- X_1^0 e- X_1^0 f f. This
decay channel has in general a smaller branching ratio than the e~ e~ -> e-
X_1^0 e- X_1^0 mode, but has the advantage that the momenta of all final state
particles can be determined without using the selectron masses as input. The
reconstruction of the momenta allows the simultaneous study of: (i) selectron
mass distributions; (ii) selectron spins, via the angular distributions of the
e- in the selectron rest frames; (iii) selectron masses andspins, using the e-
energy distributions in the CM frame; (iv) the selectron "chirality", with the
analysis of the spin of the produced X_2^0.


title: Mapping out the quark structure of hadrons in QCD

abstract:
  In the context of QCD sum rules with non-local condensates we present a pion
distribution amplitude, which is double-humped with its end-points x\to(0,1)
strongly suppressed, and show that it matches the CLEO experimental data on the
pion-photon transition at the 1\sigma level accuracy, being also in compliance
with the CELLO data. We also include some comments on the nucleon distribution
amplitude and the nucleon evolution equation.


title:
Potential models, sum rules, color singlet model versus NREFT in Heavy
  Quarkonium

abstract:
  I briefly review how nonrelativistic effective field theories solve old
puzzles and open problems in heavy quarkonium physics.


title: SU(3)_c X SU(4)_L X U(1)_x without exotic electric charges

abstract:
  We present an extension of the Standard Model to the local gauge group
$SU(3)_c\otimes SU(4)_L\otimes U(1)_X$ with a family non-universal treatment
and anomalies canceled among the three families in a nontrivial fashion. The
mass scales, the gauge boson masses, and the masses for the spin 1/2 particles
in the model are analyzed. The neutral currents coupled to all neutral vector
bosons in the model are studied, and particular values of the parameters are
used in order to simplify the mixing between the three neutral currents present
in the theory, mixing which is further constrained by experimental results from
the CERN LEP, SLAC Linear Collider, and atomic parity violation.


title: A heretical view on linear Regge trajectories

abstract:
  We discuss a possibility that linear Regge trajectories originate not from
gluonic strings connecting quarks, as it is usually assumed, but from pion
excitations of light hadrons. From this point of view, at large angular momenta
both baryons and mesons lying on linear Regge trajectories are slowly rotating
thick strings of pion field, giving rise to a universal slope computable from
the pion decay constant. The finite resonance widths are mainly due to the
semiclassical radiation of pion fields by the rotating elongated chiral
solitons. Quantum fluctuations about the soliton determine a string theory
which, being quantized, gives the quantum numbers for Regge trajectories.


title: B_s-B_s-bar mixing in an SO(10) SUSY GUT model

abstract:
  We perform a renormalisation group analysis of the SO(10) model proposed by
Chang, Masiero and Murayama, which links the large atmospheric neutrino mixing
angle to loop-induced transitions between right-handed b and s quarks. We
compute the impact on B_s-B_s-bar mixing and find that the mass difference in
the B_s system can exceed its Standard Model value by a factor of 16.


title: Neutrino flavour relaxation or neutrino oscillations?

abstract:
  We propose the new mechanism of neutrino flavour relaxation to explain the
experimentally observed changes of initial neutrino flavour fluxes. The test of
neutrino relaxation hypothesis is presented, using the data of modern reactor,
solar and accelerator experiments. The final choice between the standard
neutrino oscillations and the proposed neutrino flavour relaxation model can be
done in future experiments.


title: Chiral perturbation theory for pentaquark baryons and its applications

abstract:
  We construct a chiral lagrangian for pentaquark baryons assuming that the
recently found Theta^+ (1540) state belongs to an antidecuplet of SU(3) flavor
symmetry with J^P = (1/2)^(+-). We derive the Gell-Mann-Okubo formulae for the
antidecuplet baryon masses, and a possible mixing between the antidecuplet and
the pentaquark octet. Then we calculate the cross sections for pi^- p -> K^-
Theta^+ and gamma n -> K^- Theta^+ using our chiral lagrangian. The resulting
amplitudes respect the underlying chiral symmetry of QCD correctly. We also
describe how to include the light vector mesons in the chiral lagrangian.


title:
The electric charge at the two-loop level in the Standard Model and the
  precision measurements of Delta alpha_{had}

abstract:
  The complete calculation of the 2-loop electroweak corrections to the
renormalization of the electric charge in the Standard Model allows to discuss
in detail the value of the MSbar effective coupling $\hat e(m_Z)$. We discuss
the phenomenological impact of these results in view of the increasing accuracy
in the measurements of the cross-section of the reaction e+e- -->hadrons at low
energies.


title: Theoretical aspects of spin physics

abstract:
  A summary is given of how spin enters in collinearly factorizing processes.
Next, theoretical aspects of polarization in processes beyond collinear
factorization are discussed in more detail, with special focus on recent
developments concerning the color gauge invariant definitions of transverse
momentum dependent distribution and fragmentation functions, such as the Sivers
and Collins effect functions. This has particular relevance for azimuthal
single spin asymmetries, which currently receive much theoretical and
experimental attention.


title: Quark Mixing, CKM Unitarity

abstract:
  In the Standard Model of elementary particles, quark-mixing is expressed in
terms of a 3 x 3 unitary matrix V, the so called Cabibbo-Kobayashi-Maskawa
(CKM) matrix. Significant unitarity checks are so far possible for the first
row of this matrix. This article reviews the experimental and theoretical
information on these matrix elements. On the experimental side, we find a 2.2
sigma to 2.7 sigma deviation from unitarity, which conflicts with the Standard
Model.


title: A remark on the "Theory of neutrino oscillations"

abstract:
  It is shown that the derivation of standard oscillation phase in the plane
wave approximation without equal energy assumption is fraught with
inconsistencies.


title: Quasiparticle description of the hot and dense quark-gluon plasma

abstract:
  The collective modes of QCD at temperatures and densities above its
phase-transition are analyzed for isotropic systems as well as for systems
having an anisotropy in momentum-space using the HTL approximation. For
isotropic systems, results for the thermodynamic pressure and entropy at finite
densities based on a phenomenological description of lattice calculations at
vanishing densities are derived and compared to those following from different
methods. From the resulting equation of state the mass-radius relationship of
so-called quark-stars and other applications are investigated. It is shown that
systems with anisotropic momentum-space distributions contain unstable modes in
addition to the stable quasiparticle modes, which may be of great importance
for the dynamical evolution of an incompletely thermalized quark-gluon plasma.
Finally, the effects of the anisotropy on the collisional energy loss are
studied.


title:
Comment on "Vacuum Photon Splitting in Lorentz-Violating Quantum
  Electrodynamics"

abstract:
  It has been argued in hep-ph/0212382 that there may be observable effects
from photon triple splitting in an extended version of quantum electrodynamics
with Lorentz violation in the fermion sector. The argument is based on an
analogy with photon splitting via collinear parametric down-conversion in
optically active crystals. In this Comment, we point out that the analogy is
misleading and that, at the order considered, the probability of on-shell
photon triple splitting is strictly zero.


title: Cosmological mass limits on neutrinos, axions, and other light particles

abstract:
  The small-scale power spectrum of the cosmological matter distribution
together with other cosmological data provides a sensitive measure of the hot
dark matter fraction, leading to restrictive neutrino mass limits. We extend
this argument to generic cases of low-mass thermal relics. We vary the cosmic
epoch of thermal decoupling, the radiation content of the universe, and the new
particle's spin degrees of freedom. Our treatment covers various scenarios of
active plus sterile neutrinos or axion-like particles. For three degenerate
massive neutrinos, we reproduce the well-known limit of m_nu < 0.34 eV. In a
3+1 scenario of 3 massless and 1 fully thermalized sterile neutrino we find
m_nu < 1.0 eV. Thermally produced QCD axions must obey m_a < 3.0 eV,
superseding limits from a direct telescope search, but leaving room for solar
eV-mass axions to be discovered by the CAST experiment.


title:
Direct and Indirect Detection of Dark Matter in Heterotic Orbifold
  Models

abstract:
  We study the neutralino dark matter phenomenology in the context of effective
field theories derived from the weakly--coupled heterotic string. We consider
in particular direct detection and indirect detection with neutrino telescopes
rates. The two cases of moduli dominated and dilaton dominated SUSY breaking
lead to completely different phenomenologies. Even if in both cases relic
density constraints can be fulfilled, moduli domination generically leads to
detection rates which are much below the present and future experimental
sensitivities, whereas dilaton domination gives high detection rates accessible
to the next generation of experiments. This could make dark matter searches an
alternative way to constrain high energy fundamental parameters.


title:
Prospects for Detecting a Neutrino Magnetic Moment with a Tritium Source
  and Beta-beams

abstract:
  We compare the prospects for detecting a neutrino magnetic moment by the
measurement of neutrinos from a tritium source, reactors and low-energy
beta-beams. In all cases the neutrinos or antineutrinos are detected by
scattering of electrons. We find that a large (20 MCurie) tritium source could
improve the limit on the neutrino magnetic moment significantly, down to the
level of a few $\times 10^{-12}$ while low-energy beta-beams with sufficiently
rapid production of ions could improve the limits to the level of a few $\times
10^{-11}$. The latter would require ion production at the rate of at least
$10^{15}$ s$^{-1}$.


title: Flavour in Intersecting Brane Models and Bounds on the String Scale

abstract:
  We study flavour issues in nonsupersymmetric intersecting brane models.
Specifically, the purpose of the present paper is twofold: (i) to determine
whether realistic flavour structures can be obtained in these models, and (ii)
to establish whether the non-supersymmetric models address the gauge hierarchy
problem. To this end, we find that realistic flavour structures, although
absent at tree level, can arise even in the simplest models after effects of 4
fermion instanton--induced operators and radiative corrections have been taken
into account. On the other hand, our analysis of flavour changing neutral
currents (FCNC), electric dipole moments (EDM), supernova SN1987A and other
constraints shows that the string scale has to be rather high, 10^4 TeV. This
implies that non-supersymmetric intersecting brane models face a severe
finetuning problem. Finally, we comment on how non--trivial flavour structures
can arise in supersymmetric models.


title: Absence of resonant enhancements in some inclusive rates

abstract:
  A toy model is defined and solved perturbatively with the aim of examining
some claimed "resonant" enhancements of certain reaction rates that enter
popular models of leptogenesis. We find: a) that such enhancements are absent;
and b) that the perturbative solution, as done correctly using finite-
temperature field theory, is well defined without the "resumming" procedures
found in the literature. The pathologies that led to the perceived need for
these procedures are an artifact of uncritical use of weighted vacuum cross-
sections in the determination of rates, without adequate attention to the
effects of the medium upon the single particle states within it.


title:
Gravity-assisted exact unification in minimal supersymmetric SU(5) and
  its gaugino mass spectrum

abstract:
  Minimal supersymmetric SU(5) with exact unification is naively inconsistent
with proton decay constraints. However, it can be made viable by a
gravity-induced non-renormalizable operator connecting the adjoint Higgs boson
and adjoint vector boson representations. We compute the allowed coupling space
for this theory and find natural compatibility with proton decay constraints
even for relatively light superpartner masses. The modifications away from the
naive SU(5) theory have an impact on the gaugino mass spectrum, which we
calculate. A combination of precision Linear Collider and Large Hadron Collider
measurements of superpartner masses would enable interesting tests of the
high-scale form of minimal supersymmetric SU(5).


title:
Nonleptonic $\Lambda_b$ decays to $D_s(2317)$, $D_s(2460)$ and other
  final states in Factorization

abstract:
  We consider nonleptonic Cabibbo--allowed $\Lambda_b$ decays in the
factorization approximation. We calculate nonleptonic decays of the type $
\Lambda_b \to \Lambda_c P $ and $ \Lambda_b \to \Lambda_c V $ relative to
$\bar{B}_d \to D^+ P$ and $\bar{B}_d \to D^+ V$ where we include among the
pseudoscalar states(P) and the vector states(V) the newly discovered $D_s$
resonances, $D_s(2317)$ and $D_s(2460)$. In the ratio of $\Lambda_b$ decays to
$D_s(2317)$ and $D_s(2460)$ relative to the $\bar{B}_d$ decays to these states,
the poorly known decay constants of $D_s(2317)$ and $D_s(2460)$ cancel leading
to predictions that can shed light on the nature of these new states. In
general, we predict the $\Lambda_b$ decays to be larger than the corresponding
$\bar{B}_d$ decays and in particular we find the branching ratio for $\Lambda_b
\to \Lambda_c D_s(2460)$ can be between four to five times the branching ratio
for $\bar{B}_d \to D^+ D_s(2460)$. This enhancement of $\Lambda_b$ branching
ratios follows primarily from the fact that more partial waves contribute in
$\Lambda_b$ decays than in $\bar{B}_d$ decays. Our predictions are largely
independent of model calculations of hadronic inputs like form factors and
decay constants.


title: Structure of the nuclear force in a chiral quark-diquark model

abstract:
  We discuss the structure of the nuclear force using a lagrangian derived from
hadronization of a chiral quark and diquark model. A generalized trace log
formula including meson and nucleon fields is expanded to the order in which
relevant terms emerge. It is shown that the nuclear force is composed of long
and medium range parts of chiral meson exchanges and short range parts of
quark-diquark exchanges. The ranges of the scalar and vector interactions
coincide well with those of sigma ($\sigma$) and omega ($\omega$) meson
exchanges if the size of the nucleon core of a quark-diquark bound state is
adjusted appropriately.


title:
Pion-photon and photon-pion transition form factors in light-cone
  formalism

abstract:
  We derive the minimal Fock-state expansions of the pion and the photon wave
functions in light-cone formalism, then we calculate the pion-photon and the
photon-pion transition form factors of $\gamma ^{\ast}\pi ^{0}\to \gamma $ and
$\gamma ^{\ast}\gamma \to \pi ^{0}$ processes by employing these
quark-antiquark wave functions of the pion and the photon. We find that our
calculation for the $\gamma ^{\ast}\gamma \to \pi ^{0}$ transition form factor
agrees with the experimental data at low and moderately high energy scale.
Moreover, the physical differences and inherent connections between the
transition form factors of $\gamma ^{\ast}\pi ^{0}\to \gamma $ and $ \gamma
^{\ast}\gamma \to \pi ^{0}$ have been illustrated, which indicate that these
two physical processes are intrinsically related. In addition, we also discuss
the $\pi ^{0}\to \gamma \gamma $ form factor and the decay width $
\mathit{\Gamma}(\pi \to \gamma \gamma)$ at $Q^{2}=0$.


title:
The Cosmological Energy Density of Neutrinos from Oscillation
  Measurements

abstract:
  The emerging structure of the neutrino mass matrix, when combined with the
primordial element abundances, places the most stringent constraint on the
flavor asymmetries in the cosmological neutrino background and therefore its
energy density. I review the mechanism of synchronized neutrino oscillations in
the an early universe with degenerate (asymmetric) neutrino and antineutrino
densities and the implications of refined measurements of neutrino parameters.


title: How to model BEC numrically?

abstract:
  The new method of numerical modelling of Bose-Einstein correlations observed
in all kinds of multiparticle production processes is proposed.


title: Screened potential and the baryon spectrum

abstract:
  We show that in a quark model scheme the use of a screened potential,
suggested by lattice QCD, instead of an infinitely rising one with the
interquark distance, provides a more adequate description of the high-energy
baryon spectrum. In particular an almost perfect parallelism between the
predicted and observed number of states comes out throwing new light about the
so-called missing resonance problem.


title: Single particle spectra from information theory point of view

abstract:
  It is demonstrated how to obtain the least biased description of the single
particle spectra measured in all multiparticle production processes by using
information theory approach (known also as MaxEnt approach). The case of e+e-
annihilation in hadrons process is discussed in more detail as an example.
Comparison between MaxEnt approach and simple dynamical model based on the
cascade process is presented as well.


title:
Radiative Corrections to Neutrino Mixing and CP Violation in the Minimal
  Seesaw Model with Leptogenesis

abstract:
  Radiative corrections to neutrino mixing and CP violation are analyzed in the
minimal seesaw model with two heavy right-handed neutrinos. We find that
textures of the effective Majorana neutrino mass matrix are essentially stable
against renormalization effects. Taking account of the
Frampton-Glashow-Yanagida ansatz for the Dirac neutrino Yukawa coupling matrix,
we calculate the running effects of light neutrino masses, lepton flavor mixing
angles and CP-violating phases for both $m_1 =0$ (normal mass hierarchy) and
$m_3 =0$ (inverted mass hierarchy) cases in the standard model and in its
minimal supersymmetric extension. Very instructive predictions for the
cosmological baryon number asymmetry via thermal leptogenesis are also given
with the help of low-energy neutrino mixing quantities.


title: An anomalous Wtb coupling at a linear collider

abstract:
  Differential cross sections of secondary particles in a process of top quark
pair production and decay into six fermions at a linear collider with an
unpolarized and a longitudinally polarized electron beam are computed to the
lowest order in the standard model and in the presence of an anomalous Wtb
coupling. It is illustrated that the latter has a little impact on the
differential cross sections. In particular, it is shown that the angular
distribution of a secondary lepton receives practically no contribution from
the anomalous Wtb coupling, even if the top quark is produced off shell and the
non-double resonance background contributions are taken into account. This
finding is in accordance with the decoupling theorem that has been proven in
literature in the narrow top quark width approximation.


title: Baryon Form Factors of Relativistic Constituent-Quark Models

abstract:
  The electromagnetic and axial form factors of the nucleon and its lowest
positive parity excitations, the Delta(1232) and the N*(1440), are calculated
with constituent-quark models that are specified by simple algebraic
representations of the mass-operator eigenstates. Poincar\'e covariant current
operators are generated by the dynamics from single-quark currents that are
covariant under a kinematic subgroup. The dependence of the calculated form
factors on the choice of kinematics and on the gross features of the wave
functions is illustrated for instant-form, point-form, and front-form
kinematics. A simple algebraic form of the orbital ground state wave function,
which depends on two parameters, allows a fair description of all the form
factors over the empirically accessible range, although with widely different
choices of the parameters, which determine the range and shape of the orbital
wave function. The neutron electric form factor requires additional features,
for instance the presence of mixed symmetry S-state component with 1 -- 2 %
probability in the ground state wave function. Instant and front form
kinematics demand a spatially extended wave function, whereas in point form
kinematics the form factors may be described with a quite compact wave
function.


title:
Impact of saturation on s-channel helicity nonconservation for
  diffractive vector mesons

abstract:
  As Glauber has shown in 1959, the spin-flip phenomena caused by the
conventional spin-orbit interaction do vanish in the scattering off heavy,
strongly absorbing nuclei. On the other hand, the origin of the s-channel
helicity nonconservation (SCHNC) in diffractive DIS is of the origin different
from simple spin-orbit interaction, and here we demonstrate that SCHNC in
vector meson production survives strong absorption effects in nuclear targets.
The intranuclear absorption often discussed in terms of the saturation effects
introduces a new large scale $Q_A^2$ into the calculation of diffractive vector
meson production amplitudes. Based on the color dipole approach, we show how
the impact of the saturation scale $Q_A^2$ changes from the coherent to
incoherent/quasifree diffractive vector mesons.


title: Support of Evidence for Neutrinoless Double Beta Decay

abstract:
  Indirect support for the evidence of neutrinoless double beta decay reported
recently, is obtained by analysis of other Ge double beta experiments, which
yield independent information on the background in the region of Q_(beta-beta).
Some statistical features as well as background simulations with GEANT 4 of the
HEIDELBERG-MOSCOW experiment are discussed which disprove recent criticism.


title: Colour dipoles and rho, phi electroproduction

abstract:
  We present a detailed comparison of a variety of predictions for diffractive
light vector meson production with the data collected at the HERA collider. All
our calculations are performed within a dipole model framework and make use of
different models for the meson light-cone wavefunction. There are no free
parameters in any of the scenarios we consider. Generally we find good
agreement with the data using rather simple Gaussian motivated wavefunctions in
conjunction with dipole cross-sections which have been fitted to other data.


title: Inclusive quarkonium production and the NRQCD factorization approach

abstract:
  I discuss the current status of the comparison between quarkonium-production
measurements and the predictions of the NRQCD factorization formalism.


title:
Investigation of the color-dipole structure in diffractive t-slopes of
  charmonia photo- and electroproductions

abstract:
  The diffractive t-slope, B_V, of elastic charmonia (V=J/psi, psi') photo- and
leptoproductions off a nucleon is studied at low |t| (< 1 GeV^2) in the leading
logarithmic approximation of perturbative QCD, with a special emphasis on the
space-time evolution of the c\bar{c}-dipole. We obey a framework based on QCD
factorization, which describes a certain Fermi motion effect due to the
$c(\bar{c})$-quarks in the proper manner and includes appropriately kinematical
corrections of the momentum transfer Delta_perp in the t-channel. Assuming the
universal two-gluon form factor of the nucleon, we show that the difference of
t-slopes for J/psi and psi' is dominated by the contribution from the
dipole-charmonium transition process. The calculated difference is found to be
B_J/psi-B_psi' \sim 0.53 GeV^-2 for the photoproduction, in agreement with HERA
data. We also calculate the t-dependence of the total cross sections for
several center-of-mass energies W. A good agreement of the results with the
available data demands that the mass scale appearing in the gluon form factor
should significantly decrease with increasing W.


title: The \bar q q Bound States and Instanton Molecule at T >~ T_c

abstract:
  The main objective of this work is to explore the evolution in the structure
of the quark-anti-quark bound states in going down in the chirally restored
phase from the so-called "zero binding points" $T_{zb}$ to the full
(unquenched) QCD critical temperature $T_c$ at which the Nambu-Goldstone and
Wigner-Weyl modes meet. In doing this, we adopt the idea recently introduced by
Shuryak and Zahed for charmed $\bar c c$, light-quark $\bar q q$ mesons $\pi,
\sigma, \rho, A_1$ and gluons that at $T_{zb}$, the quark-anti-quark scattering
length goes through $\infty$ at which conformal invariance is restored, thereby
transforming the matter into a near perfect fluid behaving hydrodynamically, as
found at RHIC. We show that the binding of these states is accomplished by the
combination of (i) the color Coulomb interaction, (ii) the relativistic
effects, and (iii) the interaction induced by the instanton-anti-instanton
molecules. The spin-spin forces turned out to be small. While near $T_{zb}$ all
mesons are large-size nonrelativistic objects bound by Coulomb attraction, near
$T_c$ they get much more tightly bound, with many-body collective interactions
becoming important and making the $\sigma$ and $\pi$ masses approach zero (in
the chiral limit). The wave function at the origin grows strongly with binding,
and the near-local four-Fermi interactions induced by the instanton molecules
play an increasingly more important role as the temperature moves downward
toward $T_c$.


title:
TeV-Scale Horizontal Symmetry and the Slepton Mass Problem of Anomaly
  Mediation

abstract:
  We propose a new scenario for solving the tachyonic slepton mass problem of
anomaly mediated supersymmetry breaking models with a non-Abelian horizontal
gauge symmetry broken at the TeV scale. A specific model based on SU(3)_{H}
horizontal symmetry is presented wherein the sleptons receive positive
mass-squared from the asymptotically free SU(3)_{H} gauge sector. Approximate
global symmetries present in the model strongly suppress flavor changing
processes induced by the horizontal vector gauge bosons. The model predicts
m_{h} < 120 GeV for the lightest Higgs boson mass, tan{beta} nearly equal to 4,
and M_V = 1-4 TeV for the SU(3)_{H} gauge boson masses. The lightest SUSY
particle is found to be the neutral Wino, which is a candidate for cold dark
matter.


title: Chargino contribution to the rare decay b -> s s bar{d}

abstract:
  The rare decay b -> s s bar{d} is studied in the supersymmetric standard
model by considering the contribution from the chargino box diagrams. We find
that this contribution amounts to 10^{-9} in the branching ratio.


title:
Electroweak Symmetry Breaking in Supersymmetric Gauge-Higgs Unification
  Models

abstract:
  We examine the Higgs mass parameters and electroweak symmetry breaking in
supersymmetric orbifold field theories in which the 4-dimensional Higgs fields
originate from higher-dimensional gauge supermultiplets. It is noted that such
gauge-Higgs unification leads to a specific boundary condition on the Higgs
mass parameters at the compactification scale, which is independent of the
details of supersymmetry breaking mechanism. With this boundary condition,
phenomenologically viable parameter space of the model is severely constrained
by the condition of electroweak symmetry breaking for supersymmetry breaking
scenarios which can be realized naturally in orbifold field theories. For
instance, if it is assumed that the 4-dimensional effective theory is the
minimal supersymmetric standard model with supersymmetry breaking parameters
induced mainly by the Scherk-Schwarz mechanism, a correct electroweak symmetry
breaking can not be achieved for reasonable range of parameters of the model,
even when one includes additional contributions to the Higgs mass parameters
from the auxiliary component of 4-dimensional conformal compensator. However if
there exists a supersymmetry breaking mediated by brane superfield, sizable
portion of the parameter space can give a correct electroweak symmetry
breaking.


title:
Production of Scalar Higgs Bosons Associated with $Z^0$ Boson at the
  CERN LHC in the MSSM

abstract:
  We investigate the associated production of a scalar Higgs boson ($h^0$ or
$H^0$) with $Z^0$ boson in the minimal supersymmetric extension of the standard
model (MSSM) at the CERN Large Hadron Collider (LHC), including the
contributions from $b\bar{b}$ annihilation at the tree level and gluon fusion
via quark and squark loops. We quantitatively analyze the total cross sections
in the mSUGRA scenario. For the production of $h^0$ associated with $Z^0$, we
find that in most of the parameter regions, the contributions from initial
$b\bar{b}$ and $gg$ are at a level of one percent of the total cross section
and therefore almost insignificant. For the production of $H^0$ associated with
$Z^0$, the contributions from $b\bar{b}$ channel can be much larger than those
from light quark initial states. Especially for large $\tan\beta$, the
increment can reach about one order of magnitude. Thus, when considering the
associated production of $H^0$ and $Z^0$ at the LHC, the contributions from
$b\bar{b}$ annihilation should be taken into account seriously.


title: Reply to "A remark on the 'Theory of neutrino oscillations'"

abstract: I refute the criticisms of hep-ph/0311241 raised in hep-ph/0312151.


title: On the electron-positron energy asymmetry in K_L --> pi0 e+ e-

abstract:
  Motivated by some new experimental and theoretical efforts, we update the
theoretical analysis of the electron-positron energy asymmetry, which arises,
in K_L --> pi0 e+ e-, from the two-photon intermediate state in the standard
model. It is found that the measurement of this asymmetry in future experiments
may increase our understanding of the K_{L, S} --> pi0 e+ e- decays, which
would thus provide some useful information on quark flavor physics. Meanwhile,
in the standard model the electron-positron energy asymmetry in the decay of
K_S --> pi0 e+ e- is expected to be vanishingly small, therefore the asymmetry
in K_S --> pi0 e+ e- might be a very interesting quantity to explore new
physics scenarios.


title:
Chiral Doubling of Heavy-Light Hadrons and the Vector Manifestation of
  Hidden Local Symmetry

abstract:
  Starting with a hidden local symmetry Lagrangian at the vector manifestation
(VM) fixed point that incorporates heavy-quark symmetry and matching the bare
theory to QCD, we calculate the splitting of chiral doublers of heavy-light
mesons proposed by Nowak, Rho and Zahed, and Bardeen and Hill. We show, in the
three-flavor chiral limit, that the splitting is directly proportional to the
light-quark condensate <\bar{q}q> and comes out to be \sim (1/3) m_N where m_N
is the nucleon mass, implying that the splitting vanishes in the chiral limit
at the chiral restoration point -- temperature T_c, density n_c or number of
flavors N_F^c. The result turns out to be surprisingly simple with the vector
(\rho) meson playing the crucial role in quantum corrections, pointing to the
relevance of the VM to QCD in the way chiral symmetry is manifested in hadronic
matter. We also make predictions on the hadronic decay processes of the excited
heavy (charm) -light mesons \tilde{D}.


title: tau -> (3 pions) nu_tau decays in the Resonance Effective Theory

abstract:
  tau -> (3 pions) nu_tau decays are analysed within the framework of the
resonance effective theory of QCD. We work out the relevant Lagrangian that
describes the axial-vector current hadronization contributing to these
processes, in particular the local a_1(1260)-rho(770)-Goldstone interactions.
The new coupling constants are constrained by imposing the asymptotic behaviour
of the corresponding spectral function within QCD. Hence we compare the
theoretical framework with the experimental data, obtaining a good quality fit
from the ALEPH spectral function and branching ratio. We also get values for
the mass and on-shell width of the a_1(1260) resonance. In this way we are able
to provide the structure functions that have been measured by OPAL and CLEO-II
and we find an excellent agreement.


title: Higgs Production at LHC

abstract:
  We review Higgs production at hadron colliders via vector-boson fusion and
via gluon fusion, fully inclusively and in association with one and two jets.
Then we address the issue of the measurement of the coupling of the Higgs to
the vector bosons at LHC.


title:
Nonequilibrium pion dynamics near the critical point in a constituent
  quark model

abstract:
  We study static and dynamical critical phenomena of chiral symmetry breaking
in a two-flavor Nambu--Jona-Lasinio constituent quark model. We obtain the
low-energy effective action for scalar and pseudoscalar degrees of freedom to
lowest order in quark loops and to quadratic order in the meson fluctuations
around the mean field. The \emph{static} limit of critical phenomena is shown
to be described by a Ginzburg-Landau effective action including \emph{spatial}
gradients. Hence \emph{static} critical phenomena is described by the
universality class of the O(4) Heisenberg ferromagnet. \emph{Dynamical}
critical phenomena is studied by obtaining the equations of motion for pion
fluctuations. We find that for $T<T_c$ the are stable long-wavelength pion
excitations with dispersion relation $\omega_{\pi}(k)=k$ described by isolated
pion poles. The residue of the pion pole vanishes near $T_c$ as $Z \propto
1/|\ln(1-T/T_c)|$ and long-wavelength fluctuations are damped out by Landau
damping on a time scale $t_\mathrm{rel}(k)\propto 1/k$, reflecting
\emph{critical slowing down} of pion fluctuations near the critical point. At
the critical point, the pion propagator features mass shell logarithmic
divergences which we conjecture to be the harbinger of a (large) dynamical
anomalous dimension. We find that while the \emph{classical spinodal} line
coincides with that of the Ginzburg-Landau theory, the growth rate of
long-wavelength spinodal fluctuations has a richer wavelength dependence as a
consequence of Landau damping. We argue that Landau damping prevents a
\emph{local} low energy effective action in terms of a derivative expansion in
real time.


title:
Probing Minimal 5D Extensions of the Standard Model: From LEP to an
  e^+e^- Linear Collider

abstract:
  We derive new improved constraints on the compactification scale of minimal
5-dimensional (5D) extensions of the Standard Model (SM) from electroweak and
LEP2 data and estimate the reach of an e^+e^- linear collider such as TESLA.
Our analysis is performed within the framework of non-universal 5D models,
where some of the gauge and Higgs fields propagate in the extra dimension,
while all fermions are localized on a S^1/Z_2 orbifold fixed point. Carrying
out simultaneous multi-parameter fits of the compactification scale and the SM
parameters to the data, we obtain lower bounds on this scale in the range
between 4 and 6 TeV. These fits also yield the correlation of the
compactification scale with the SM Higgs mass. Investigating the prospects at
TESLA, we show that the so-called GigaZ option has the potential to improve
these bounds by about a factor 2 in almost all 5D models. Furthermore, at the
center of mass energy of 800 GeV and with an integrated luminosity of 10^3
fb^-1, linear collider experiments can probe compactification scales up to
20-30 TeV, depending on the control of systematic errors.


title:
Regge analysis of pion-pion (and pion-kaon) scattering for energy
  s^{1/2}>1.4 GeV

abstract:
  We perform a detailed Regge analysis of NN, pion-N and pion-pion scattering.
  From it, we find expressions that represent the pion-pion scattering
amplitudes with an accuracy of a few percent, for exchange of isospin zero, and
$\sim15%$ for exchange of isospin 1, and this for energies s^{1/2}> 1.4 GeV and
for momentum transfers |t|^{1/2}< 0.4 GeV. These Regge formulas are perfectly
compatible with the low energy (s^{1/2}< 1.4 GeV) scattering amplitudes deduced
from pion-pion phase shift analyses as well as with higher energy (s^{1/2}>1.4
GeV) experimental pion-pion cross sections. They are also compatible with NN
and pion-N experimental cross sections using factorization, a property that we
check with great precision. This contrasts with results from phase shift
analyses of the pion-pion scattering amplitude which bear little resemblance to
reality in the region $1.4<s^{1/2}<2 GeV$, as they are not well defined and
increasingly violate a number of physical requirements as energy grows.
Pion-kaon scattering is also considered, and we present a Regge analysis for
these processes valid for energies s^{1/2}>1.7 GeV.
  As a byproduct of our analysis we present also a fit of $NN$, $\pi N$ and
$KN$ cross sections valid from c.m. kinetic energy $E_{\rm kin}\simeq1$ GeV to
multi TeV energies.


title: Massive Elementary Particles and Black Holes

abstract:
  An outstanding problem posed by Einstein's general theory of relativity to
the quantum theory of point particle fields is the fate of a massive point
particle; for, in the classical solutions of Einstein's theory, such a system
should be a black hole. We use exact results in a new approach to quantum
gravity to show that this conclusion is obviated by quantum loop effects.
Phenomenological implications are discussed


title:
Numerical evaluation of the general massive 2-loop 4-denominator
  self-mass master integral from differential equations

abstract:
  The differential equation in the external invariant p^2 satisfied by the
master integral of the general massive 2-loop 4-denominator self-mass diagram
is exploited and the expansion of the master integral at p^2=0 is obtained
analytically. The system composed by this differential equation with those of
the master integrals related to the general massive 2-loop sunrise diagram is
numerically solved by the Runge-Kutta method in the complex p^2 plane. A
numerical method to obtain results for values of p^2 at and close to thresholds
and pseudo-thresholds is discussed in details.


title: Color Transparent GPDs?

abstract:
  The relation between GPD's and color transparency is explored. The discovery
of color transparency in pionic diffractive dissociation reactions allows us to
make specific predictions for the behavior of the pion generalized parton
distribution, and provide a further test of any model of the pion form factor.


title:
The theta^+ baryon in soliton models: large Nc QCD and the validity of
  rigid-rotor quantization

abstract:
  A light collective theta+ baryon state (with strangeness +1) was predicted
via rigid-rotor collective quantization of SU(3) chiral soliton models. This
paper explores the validity of this treatment. A number of rather general
analyses suggest that predictions of exotic baryon properties based on this
approximation do not follow from large Nc QCD. These include an analysis of the
baryon's width, a comparison of the predictions with general large Nc
consistency conditions of the Gervais-Sakita-Dashen-Manohar type; an
application of the technique to QCD in the limit where the quarks are heavy; a
comparison of this method with the vibration approach of Callan and Klebanov;
and the 1/Nc scaling of the excitation energy. It is suggested that the origin
of the problem lies in an implicit assumption in the that the collective motion
is orthogonal to vibrational motion. While true for non-exotic motion, the
Wess-Zumino term induces mixing at leading order between collective and
vibrational motion with exotic quantum numbers. This suggests that successful
phenomenological predictions of theta+ properties based on rigid-rotor
quantization were accidental.


title: Neutrinos with Z_3 symmetry and new charged-lepton interactions

abstract:
  An approximate Z_3 family symmetry is proposed for leptons which results in a
neutrino mass matrix with sin^2 2 theta_atm = 1 and tan^2 theta_sol = 0.5, but
the latter value could easily be smaller. A generic requirement of this
approach is the appearance of three Higgs doublets at the electroweak scale,
resulting in possibly observable flavor violating leptonic decays, such as mu
-> eee and mu -> e gamma.