title: Bohr-Sommerfeld quantization and meson spectroscopy

abstract:
  We use the Bohr-Sommerfeld quantization approach in the context of
constituent quark models. This method provides, for the Cornell potential,
analytical formulae for the energy spectra which closely approximate numerical
exact calculations performed with the Schrodinger or the spinless Salpeter
equations. The Bohr-Sommerfeld quantization procedure can also be used to
calculate other observables such as r.m.s. radius or wave function at the
origin. Asymptotic dependence of these observables on quantum numbers are also
obtained in the case of potentials which behave asymptotically as a power-law.
We discuss the constraints imposed by these formulae on the dynamics of the
quark-antiquark interaction.


title:
Neutrino mass in GUT constrained supersymmetry with R-parity violation
  in light of neutrino oscillations

abstract:
  The neutrino masses are generated in grand unified theory (GUT) constrained
supersymmetric model with R-parity violation. The neutrinos acquire masses via
tree-level neutrino-neutralino mixing as well as via one-loop radiative
corrections. The theoretical mass matrix is compared with the phenomenological
one, which is reconstructed by using neutrino oscillation and neutrinoless
double beta decay data. This procedure allows to obtain significantly stronger
constraints on R-parity breaking parameters than those existing in the
literature. The implication of normal and inverted neutrino mass hierarchy on
the sneutrino expectation values, lepton-Higgs bilinear and trilinear R-parity
breaking couplings is also discussed.


title:
Topological Charges, Prequarks and Presymmetry: a Topological Approach
  to Quark Fractional Charges

abstract:
  A topological approach to quark fractional charges, based on charge
constraints unexplained by the Standard Model of particle physics, is
discussed. Charge fractionalization is related to a tunneling process occurring
in time between pure gauge field configurations at the far past and future
associated with integer-charged bare quarks, named prequarks. This transition
conforms to a topologically nontrivial configuration of the weak gauge fields
in Euclidean space-time. In this context, an electroweak $Z_{2}$ symmetry
between bare quarks and leptons, named presymmetry, is revealed. It is shown
that an effective topological charge equal to the ratio between baryon number
and the number of fermion generations may be associated with baryonic matter.
The observed conservation of baryon number is then connected with the
conservation of this charge on quarks. Similar results are obtained for leptons
in the dual scenario with local quark charges.


title: Semirelativistic potential model for glueball states

abstract:
  The masses of two-gluon glueballs are studied with a semirelativistic
potential model whose interaction is a scalar linear confinement supplemented
by a one-gluon exchange mechanism. The gluon is massless but the leading
corrections of the dominant part of the Hamiltonian are expressed in terms of a
state dependent constituent gluon mass. The Hamiltonian depends only on 3
parameters: the strong coupling constant, the string tension, and a gluon size
which removes all singularities in the leading corrections of the potential.
Accurate numerical calculations are performed with a Lagrange mesh method. The
masses predicted are in rather good agreement with lattice results and with
some experimental glueball candidates.


title: Saturation in DIS at low x

abstract:
  Saturation at low x appears as an almost unaboidable consequence of the
two-gluon excange generic structure.


title: Analyticity and Resonance Sum Rules 1n Large $N_c$ $\pi\pi$ Scatterings

abstract:
  This paper is withdrawn due to a mistake. The revised version with a new
tiltle can be found in hep-ph/0502199.


title: A unified meson-baryon potential

abstract:
  We study the spectra of mesons and baryons, composed of light quarks, in the
framework of a semirelativistic potential model including instanton induced
forces. We show how a simple modification of the instanton interaction in the
baryon sector allows a good description of the meson and the baryon spectra
using an interaction characterized by a unique set of parameters.


title: A mass formula for light mesons from a potential model

abstract:
  The quark dynamics inside light mesons, except pseudoscalar ones, can be
quite well described by a spinless Salpeter equation supplemented by a Cornell
interaction (possibly partly vector, partly scalar). A mass formula for these
mesons can then be obtained by computing analytical approximations of the
eigenvalues of the equation. We show that such a formula can be derived by
combining the results of two methods: the dominantly orbital state description
and the Bohr-Sommerfeld quantization approach. The predictions of the mass
formula are compared with accurate solutions of the spinless Salpeter equation
computed with a Lagrange-mesh calculation method.


title: The FLUKA Monte Carlo, non-perturbative QCD and Cosmic Ray cascades

abstract:
  The FLUKA Monte Carlo code, presently used in cosmic ray physics, contains
packages to sample soft hadronic processes which are built according to the
Dual Parton Model. This is a phenomenological model capable of reproducing many
of the features of hadronic collisions in the non perturbative QCD regime. The
basic principles of the model are summarized and, as an example, the associated
Lambda-K production is discussed. This is a process which has some relevance
for the calculation of atmospheric neutrino fluxes.


title: Light Meson Spectra and Instanton Induced Forces

abstract:
  The spinless Salpeter equation supplemented by an instanton induced force is
used to describe the spectra of light mesons, including the pseudoscalar ones.
The coupling constants of the instanton induced potential, as well as the quark
constituent masses are not treated as simple free parameters but are calculated
from the underlying instanton theory. Quite good results are obtained provided
the quark are considered as effective degrees of freedom with a finite size. A
further test of the model is performed by calculating the electromagnetic mass
differences between S-wave mesons.


title: T violation in $B\to K \phi \phi $ decays

abstract:
  We present the general form of the decay width angular distributions with
T-odd terms in $B\to K \phi \phi$ decays. We concentrate on the T violating
effects by considering various possible T-odd momentum correlations. In a
generic class of CP violating new physics interactions, we illustrate that the
T violating effect could be more than 10%.


title: Neutrino mass bounds from cosmology

abstract:
  Cosmology is at present one of the most powerful probes of neutrino
properties. The advent of precision data from the cosmic microwave background
and large scale structure has allowed for a very strong bound on the neutrino
mass. Here, I review the status of cosmological bounds on neutrino properties
with emphasis on mass bounds on light neutrinos.


title:
An application of the renormalization group to the calculation of the
  vacuum decay rate in flat and curved space-time

abstract:
  I show that an application of renormalization group arguments may lead to
significant corrections to the vacuum decay rate for phase transitions in flat
and curved space-time. It can also give some information regarding its
dependence on the parameters of the theory, including the cosmological constant
in the case of decay in curved space-time.


title:
Universality of Regge and vibrational trajectories in a semiclassical
  model

abstract:
  The orbital and radial excitations of light-light mesons are studied in the
framework of the dominantly orbital state description. The equation of motion
is characterized by a relativistic kinematics supplemented by the usual funnel
potential with a mixed scalar and vector confinement. The influence of finite
quark masses and potential parameters on Regge and vibrational trajectories is
discussed. The case of heavy-light mesons is also presented.


title: Localization on Fat Branes as the Source of Neutrino Mixing

abstract:
  The localization of fermions in extra dimensions, proposed by Arkani-Hamed
and Schmaltz, is discussed as the source of the phenomenon of particle mixing.
We work out the example of neutrinos in detail.


title: Baryon spectra with instanton induced forces

abstract:
  Except the vibrational excitations of $K$ and $K^*$ mesons, the main features
of spectra of mesons composed of quarks $u$, $d$, and $s$ can be quite well
described by a semirelativistic potential model including instanton induced
forces. The spectra of baryons composed of the same quarks is studied using the
same model. The results and the limitations of this approach are described.
Some possible improvements are suggested.


title: Scattering solutions of the spinless Salpeter equation

abstract:
  A method to compute the scattering solutions of a spinless Salpeter equation
(or a Schrodinger equation) with a central interaction is presented. This
method relies on the 3-dimensional Fourier grid Hamiltonian method used to
compute bound states. It requires only the evaluation of the potential at
equally spaced grid points and yields the radial part of the scattering
solution at the same grid points. It can be easily extended to the case of
coupled channel equations and to the case of non-local interactions.


title: A semiclassical model of light mesons

abstract:
  The dominantly orbital state description is applied to the study of light
mesons. The effective Hamiltonian is characterized by a relativistic kinematics
supplemented by the usual funnel potential with a mixed scalar and vector
confinement. The influence of two different finite quark masses and potential
parameters on Regge and vibrational trajectories is discussed.


title:
Implications of analyticity to solution of Schwinger-Dyson equations in
  Minkowski space

abstract:
  We review some recent developments in nonperturbative studies of quantum
field theory (QFT) using the Schwinger-Dyson equations formulated directly in
Minkowski space. We begin with the introduction of essential ideas of the
integral representation in QFT and a discussion of renormalization in this
approach. The technique based on the integral representation of Green's
functions is exploited to solve Schwinger-Dyson equations in several quantum
field models, eg. in scalar models and in strong coupling $QED_{3+1}$ in the
quenched and in the unquenched approximation. The phenomenon of dynamical
chiral symmetry breaking in regularized theory is touched. In QCD, the
analyticity of gluon propagator on the complex momentum square plane is
exploited to continue some recent lattice data to timelike momentum axis. We
find non-positive absorptive part contribution in the Landau gauge gluon
propagator which is in agreement with some other new recent analyzes.


title: Total Cross-Sections : Cross-Talk between HERA, LHC and LC

abstract:
  We discuss the need to compare total cross-section measurements at LHC and
HERA with each other and with available models in order to obtain a more
precise prediction of the total hadronic cross-section at the future Linear
Collider, thus leading to a better estimate of the hadronic background.


title: Z' Discovery Limits For Supersymmetric E_6 Models

abstract:
  We study how the exotic particles and supersymmetric partners would affect
the discovery limit at the Tevatron and LHC for neutral gauge bosons in generic
E_6 models. We examine the Z' decay in the extreme case that all of the
particles are massless, then consider how the masses of non-standard model
particles will affect the discovery limit. We also calculate the discovery
limit for a supersymmetric E_6 model with a secluded sector as a concrete
example of a model with a definite set of exotic particles. Its discovery limit
is small compared with other E_6 models due to the U'(1) charge assignment.


title:
CalcHEP 2.3: MSSM, structure functions, event generation, batchs, and
  generation of matrix elements for other packages

abstract:
  CalcHEP is a package for computation of Feynman diagrams and integration over
multi-particle phase space. The main idea prescribed into CalcHEP is to make
available passing on from Lagrangians to the final distributions effectively
with a high level of automation. This article presents new options of CalcHEP
available in version 2.3. They are a) MSSM model with different SUGRA
scenarios, b) interface with PDFLIB and implementation of new MRST/CTEQ
structure functions, c) realization of approach to structure functions for
models with diagonal CKM, d) generation of events and interface with PYTHIA, e)
calculations in non-interactive (batch) regime, f)generation of code of
different matrix elements for other programs, g) many new interface facilities.


title:
The Polarised Photon $g_1^\gamma$ Sum Rule at the Linear Collider and
  High Luminosity B Factories

abstract:
  The sum rule for the first moment of the polarised (virtual) photon structure
function $g_1^\gamma(x,Q^2;K^2)$ is revisited in the light of proposals for
future $e^+ e^-$ colliders. The sum rule exhibits an array of phenomena
characteristic of QCD: for real photons ($K^2=0$) electromagnetic gauge
invariance constrains the first moment to vanish; the limit for asymptotic
photon virtuality ($m_\rho^2 \ll K^2 \ll Q^2$) is governed by the
electromagnetic $U_A(1)$ axial anomaly and the approach to asymptopia by the
gluonic anomaly; for intermediate values of $K^2$, it reflects the realisation
of chiral symmetry and is determined by the off-shell radiative couplings of
the pseudoscalar mesons; finally, like many polarisation phenomena in QCD, the
first moment of $g_1^\gamma$ involves the gluon topological susceptibility. In
this paper, we review the original sum rule proposed by Narison, Shore and
Veneziano and extend the relation with pseudoscalar mesons. The possibility of
measuring the sum rule in future polarised $e^+ e^-$ colliders is then
considered in detail, focusing on the International Linear Collider (ILC) and
high luminosity $B$ factories. We conclude that all the above features of the
sum rule should be accessible at a polarised collider with the characteristics
of SuperKEKB.


title:
Probing the CP-violating light neutral Higgs in the charged Higgs decay
  at the LHC

abstract:
  The CP-violating MSSM allows existence of a light neutral Higgs boson
($M_{H_1} \lapp 50$ GeV) in the CPX scenario in the low $\tan \beta (\lapp 5)$
region, which could have escaped the LEP searches due to a strongly suppressed
$H_1 Z Z$ coupling. This parameter space corresponds to a relatively light
$H^\pm$ ($M_{H^\pm} < M_t$), which is predicted to decay dominantly into the $W
H_1$ channel. Thus one expects to see a striking $t \bar t$ signal at the LHC,
where one of the top quarks decays into the $bb \bar b W$ channel, via $t \to b
H^\pm, H^\pm \to W H_1$ and $H_1 \to b \bar b$. The characteristic correlation
between the $b \bar b$, $b \bar b W$ and $b b \bar b W$ invariant mass peaks is
expected to make this signal practically free of the SM background. Our parton
level Monte Carlo simulation yields upto 5000 events, for ${\cal L} = 30$
fb$^{-1}$, over the parameter space of interest, after taking into account the
b-tagging efficiency for three or more b-tagged jets.


title:
Prospects of mass measurements for neutral MSSM Higgs bosons in the
  intense-coupling regime at a Linear Collider

abstract:
  We analyze the prospects for detecting the three neutral Higgs bosons of the
Minimal Supersymmetric extension of the Standard Model in the intense-coupling
regime at e+e- colliders. Due to the small mass differences between the Higgs
states in this regime and their relative large total decay widths, the
discrimination between the particles is challenging at the LHC and in some
cases even impossible. We propose to use the missing mass technique in the
Higgs-strahlung process in e+e- collisions to distinguish between the two
CP-even Higgs eigenstates h and H, relying on their b b-bar decay in the
b,b-bar,l+,l- event sample. Ah and AH associated production is then studied in
the 4b-jet event sample to probe the CP-odd A boson. At collider energies
sqrt(s) = 300 GeV and an integrated luminosity of 500 fb-1, accuracies in the
mass measurement of the CP-even Higgs bosons are expected to range from 100 to
300 MeV, while for the CP-odd A boson, accuracies of less than 500 MeV can be
obtained.


title:
CP Asymmetry A_{\psi K_S}, \sin 2\beta, the Sign of \Delta M_B and the
  Physics Beyond the Standard Model

abstract:
  We demonstrate that the sign of the B^0-\bar B^0 mass difference \Delta M_B
is irrelevant for the extraction of the angle \beta=\phi_1 of the unitarity
triangle from the CP asymmetry A_{\psi K_S}. Only the weak phase in the mixing
amplitude M_{12} matters. Consequently the extraction of \sin 2\beta done by
BaBar and Belle can only be affected by new weak phases in M_{12} in the
extensions of the SM and possibly but unlikely by new physics contributions to
the decay amplitude.


title: Breaking of B-L in superstring inspired E6 model

abstract:
  In the framework of the superstring inspired E6 model, low-energy extensions
of the standard model compatible with leptogenesis are considered and masses of
right-handed neutrinos in two scenarios allowed by long-lived protons are
discussed. The presence of two additional generations allows breaking of B-L
without generating nonzero vacuum expectation values of right-handed sneutrinos
of the three known generations. After the symmetry breaking, right-handed
neutrinos acquire Majorana masses of order of 10^11 GeV. Within the framework
of a simple discrete symmetry, assumptions made to provide a large mass of
right-handed neutrinos are shown to be self-consistent. Supersymmetric
structure of the theory ensures that large corrections, associated with the
presence of a (super)heavy gauge field, cancel out.


title: Single Field Baryogenesis and the Scale of Inflation

abstract:
  In the context of inflationary cosmology, we discuss a minimal baryogenesis
scenario in which the resulting baryon to entropy ratio is determined by the
amplitude of the anisotropies of the cosmic microwave background. The model
involves a new $SU(2)_L$ scalar field which generates a Dirac neutrino mass and
which is excited by quantum fluctuations during inflation, yielding a
CP-violating phase. During the scalar field decay after inflation, an asymmetry
in the left-handed neutrino number is generated, which then converts to a net
baryon asymmetry via sphalerons. A lower limit on the expected initial value of
the scalar field translates to a lower limit on the baryon to entropy ratio
(which also depends on the Dirac neutrino Yukawa coupling). Consistency with
the limits on baryonic isocurvature perturbations requires that the spectral
index of adiabatic perturbations produced during inflation be very close to
unity. In a variant of our scenario in which the scalar is a gauge singlet, the
connection between the baryon to entropy ratio and the inflationary scale is
lost, although the basic mechanism of baryogenesis remains applicable.


title: Hadronic structure aspects of $K^+\to \pi^-+ l^{+}_1 + l^{+}_2$ decays

abstract:
  As is known from previous studies the lepton number violating decays $K^+\to
\pi^- + l^{+}_1 + l^{+}_2$ have good prospects to probe new physics beyond the
Standard Model and provide valuable information on neutrino masses and mixing.
  We analyze these processes with an emphasis on their hadronic structure
aspects applying relativistic constituent quark model. We conclude that the
previously ignored contribution associated with the t-channel Majorana neutrino
exchange is comparable with the s-channel one in a wide range of neutrino
masses. We also estimated model independent absolute upper bounds on neutrino
contribution to these decays.


title:
From parameter space constraints to the precision determination of the
  leptonic Dirac CP phase

abstract:
  We discuss the precision determination of the leptonic Dirac CP phase
$\delta_{CP}$ in neutrino oscillation experiments, where we apply the concept
of ``CP coverage''. We demonstrate that this approach carries more information
than a conventional CP violation measurement, since it also describes the
exclusion of parameter regions. This will be very useful for next-generation
long baseline experiments where for sizable $\sin^2 2 \theta_{13}$ first
constraints on $\delta_{CP}$ can be obtained. As the most sophisticated
experimental setup, we analyze neutrino factories, where we illustrate the
major difficulties in their analysis. In addition, we compare their potential
to the one of superbeam upgrades and next-generation experiments, which also
includes a discussion of synergy effects. We find a strong dependence on the
yet unknown true values of $\sin^2 2 \theta_{13}$ and $\delta_{CP}$, as well as
a strong, non-Gaussian dependence on the confidence level. A systematic
understanding of the complicated parameter dependence will be given. In
addition, it is shown that comparisons of experiments and synergy discussions
do in general not allow for an unbiased judgment if they are only performed at
selected points in parameter space. Therefore, we present our results in
dependence of the yet unknown true values of $\sin^2 2 \theta_{13}$ and
$\delta_{CP}$. Finally we show that for $\delta_{CP}$ precision measurements
there exist simple strategies including superbeams, reactor experiments,
superbeam upgrades, and neutrino factories, where the crucial discriminator is
$\sin^2 2 \theta_{13} \sim 10^{-2}$.


title: A viable supersymmetric model with UV insensitive anomaly mediation

abstract:
  We propose an electroweak model which is compatible with the UV insensitive
anomaly mediated supersymmetry breaking. The model is an extension of the NMSSM
by adding vector-like matter fields which can drive the soft scalar masses of
the singlet Higgs field negative and the successful electroweak symmetry
breaking is achieved. Viable parameter regions are found to preserve
perturbativity of all the coupling constants up to the Planck scale. With this
success, the model becomes a perfect candidate of physics beyond the standard
model without the FCNC and CP problem. The cosmology is also quite interesting.
The lightest neutralino is the wino which is a perfect cold dark matter
candidate assuming the non-thermal production from the gravitino decay. There
is no gravitino problem because it decays before the BBN era, and thus the
thermal leptogenesis works. The cosmological domain wall problem inherent in
the NMSSM is absent since the Z_3 symmetry is broken by the QCD instanton
effect in the presence of the vector-like quarks. We also briefly comment on a
possible solution to the strong CP problem a la the Nelson-Barr mechanism.


title: Baryonic hybrids: Gluons as beads on strings between quarks

abstract:
  We analyze the ground state of the heavy-quark hybrid system composed of
three quarks and a gluon. The known string tension K and approximately-known
gluon mass M lead to a precise specification of the long-range non-relativistic
part of the potential binding the gluon to the quarks with no undetermined
phenomenological parameters, in the limit of large interquark separation R. Our
major tool (also used earlier by Simonov) is the use of proper-time methods to
describe gluon propagation within the quark system, which reveals the gluon
Wilson line as a composite of co-located quark and antiquark lines. We show
that (aside from color-Coulomb and similar terms) the gluon potential energy in
the presence of quarks is accurately described via attaching these three
strings to the gluon, which in equilibrium sits at the middle of the Y-shaped
string network joining the three quarks. The gluon undergoes small harmonic
fluctuations that slightly stretch these strings and quasi-confine the gluon to
the neighborhood of the middle. In the non-relativistic limit (large R) we use
the Schrodinger equation, ignoring mixing with l=2 states. Relativistic
corrections (smaller R) are applied with a variational principle for the
relativistic harmonic oscillator. We also consider the role of color-Coulomb
contributions. We find leading non-relativistic large-R terms in the gluon
string energy which behave like the square root of K/(MR). The relativistic
energy goes like the cube root of K/R. We get an acceptable fit to lattice data
with M = 500 MeV. We show that in the quark-antiquark hybrid the gluon is a
bead that can slide without friction on a string joining the quark and
anti-quark. We comment briefly on the significance of our findings to
fluctuations of the minimal surface.


title: Implications of B meson decay data -- a graphical approach

abstract:
  The considerable influx of new data on B decays offers opportunities to
determine some of the smaller contributions to the decay process, such as
suppressed diagrams, and to test the relations between decay amplitudes implied
by (broken) SU(3) symmetry. The graphical decomposition of decay amplitudes,
corrected here for the contribution of electroweak penguins following Gronau,
Rosner et al, implies bounds not only on the size of diagram contributions but
also on the relevant complex phases due to Cabbibo-Kobayashi-Maskawa matrix
factors. The available data on B decays to two charmless pseudoscalar mesons
are analysed to study some of these decay amplitude relations, and allowed
values of $\gamma=Arg(V_{ub}^*)$ which are consistent with the current favoured
values is obtained. Our analysis is based on a graphical approach, which offers
some insight that is difficult to obtain from $\chi^2$ minimisation, and our
results are consistent with recent observations on the difficulty of obtaining
simultaneous fits to $K\pi$ and $\pi\pi$ decay channels. We have also analyzed
the $K\eta$ and $K\eta'$ channels, and find similar difficulties.


title: The No-Higgs Signal: Strong WW Scattering at the LHC

abstract:
  Strong WW scattering at the LHC is discussed as a manifestation of
electroweak symmetry breaking in the absence of a light Higgs boson. The
general framework of the Higgs mechanism -- with or without a Higgs boson -- is
reviewed, and unitarity is shown to fix the scale of strong WW scattering.
Strong WW scattering is also shown to be a possible outcome of five-dimensional
models, which do not employ the usual Higgs mechanism at the TeV scale.
Precision electroweak constraints are briefly discussed. Illustrative LHC
signals are reviewed for models with QCD-like dynamics, stressing the
complementarity of the W^{\pm}Z and like-charge W^+W^+ + W^-W^- channels.


title: Imaginary part of Feynman amplitude, cutting rules and optical theorem

abstract:
  We discuss the algorithm of the cutting rules of calculating the imaginary
part of physical amplitude and the optical theorem. We ameliorate the
conventional cutting rules to make it suitable for actual calculation and give
the right imaginary part of physical amplitude. The calculations of the
imaginary parts of several Feynman diagrams show that the ameliorated cutting
rules agrees with the conventional integral algorithm very well. The
investigation helps us to find that the optical theorem has severe
contradictions and problem, thus isn't right. Besides, the calculation of a
physical amplitude show that the ameliorated cutting rules keeps the physical
result gauge-parameter independent.


title:
Probing R-parity violating interactions via $p\bar{p} \to e\mu+X$
  channel on Tevatron

abstract:
  We investigated the lepton flavor violation processes $p\bar{p} \to e\mu+X$
induced by R-parity violating interactions at the Tevatron hadron collider. The
theoretical calculation and Monte Carlo simulation demonstrate that with a set
of suitable cuts on experimental observables, one might be capable to reduce
the standard model physical background to a controllable level so that the
signals of R-parity violating interactions could be detected distinctively.
Furthermore, clear sneutrino information could be abstracted from the purified
event sample where other SUSY scalar quark 'pollution' is heavy suppressed. We
conclude that with a reasonable assumption of $10fb^{-1}$ integrated
luminosity, the Experiments at the Tevatron machine would have potential to
discover sneutrino in the region of $m_{\tilde{\nu}}\le400GeV$ via lepton
flavor violation $e\mu$ production channels, or extend the mass scale
constraint up to $m_{\tilde{\nu}}\ge 550 GeV$ at 95% CL.


title: Proton transversity and intrinsic motion of the quarks

abstract:
  The spin structure of the system of quasifree fermions having total angular
momentum $J=1/2$ is studied in a consistently covariant approach. Within this
model the relations between the spin functions are obtained. Their particular
cases are the sum rules Wanzura - Wilczek, Efremov - Leader - Teryaev,
Burkhardt - Cottingham and also the expression for the Wanzura - Wilczek twist
2 term $g_{2}^{WW}$. With the use of the proton valence quark distributions as
an input, the corresponding spin functions including transversity are obtained.


title:
Energy Dependence of Helicity--Flip Amplitudes in the Small--Angle
  Elastic pp--Scattering

abstract:
  We discuss a role of the double helicity-flip amplitudes and derive new
unitary bounds for these amplitudes in elastic $pp$-scattering at small values
of $t$. We show that the usual assumption on the smallness of such amplidudes
can be justified only in the shrinking with energy region of small $t$ values.


title:
Proceedings to the 7th Workshop 'What Comes Beyond the Standard Models',
  19. - 31. July 2004, Bled, Slovenia

abstract:
  1. Predictions for Four Generations of Quarks Suggested by the Approach
Unifying Spins and Charges (M. Breskvar, J. Mravlje, N.Mankoc Borstnik), 2.
No-scale Supergravity and the Multiple Point Principle (C.Froggatt,
L.Laperashvili, R.Nevzorov, H.B.Nielsen), 3. The Two-Higgs Doublet Model and
the Multiple Point Principle (C.Froggatt, L.Laperashvili, R.Nevzorov,
H.B.Nielsen, M.Sher), 4. New Physics From a Dynamical Volume Element (E.
Guendelman, A. Kaganovich, E. Nissimov and S. Pacheva), 5. Randomness in Random
Dynamics (A. Kleppe), 6. An Example of Kaluza-Klein-like Theories Leading After
Compactification to Massless Spinors Coupled to a Gauge Field-Derivations and
Proofs (N. Mankoc Borstnik, H. B. Nielsen and D. Lukman), 7. Geometry Decides
Gravity, Demanding General Relativity-it is Thus the Quantum Theory of Gravity
(R. Mirman), 8. Physics Would Be Impossible in Any Dimension But 3+1 - There
Could Be Only Empty Universes (R. Mirman),9. Conservation of Energy Prohibits
Proton Decay (R. Mirman), 10. Approximate Solutions for the Higgs Masses and
Couplings in the NMSSM (R. Nevzorov and D.J. Miller)


title:
Non-perturbative Heavy Quark Effective Theory: a test and its matching
  to QCD

abstract:
  We give an introduction to the special problems encountered in a treatment of
HQET beyond perturbation theory in the gauge coupling constant.
  In particular, we report on a recent test of HQET as an effective theory for
QCD and discuss how HQET can be implemented on the lattice including the
non-perturbative matching of the effective theory to QCD.


title: Chiral radiative corrections and D_s(2317)/D(2308) mass puzzle

abstract:
  We show that one loop chiral corrections for heavy-light mesons in potential
model can explain the small mass of D_s(2317) as well as the small mass gap
between D_s(2317) and D(2308).


title: Fate of k_perp-factorization for hard processes in nuclear environment

abstract:
  Large thickness of heavy nuclei brings in a new scale into the pQCD
description of hard processes in nuclear environment. The familiar linear
$k_{\perp}$-factorization breaks down and must be replaced by a new concept of
the nonlinear $k_{\perp}$-factorization introduced in \cite{Nonlinear}. I
demonstrate the salient features of nonlinear $k_{\perp}$-factorization on an
example of hard dijet production in DIS off heavy nuclei. I also discuss
briefly the non-linear BFKL evolution for gluon density of nuclei.


title: Simultaneous QCD analysis of diffractive and inclusive DIS data

abstract:
  We present a novel analysis of diffractive DIS data, in which the input
parton distributions of the Pomeron are parameterised using perturbative QCD
expressions. In addition to the usual two-gluon model for the perturbative
Pomeron, we allow for the possibility that it may be made from two sea quarks.
In particular, we treat individually the components of the Pomeron of different
size. This property allows the absorptive corrections to the inclusive DIS
structure function F_2 to be calculated using the AGK cutting rules. The
absorptive effects are found to enhance the size of the gluon distribution of
the proton at small x.


title:
Color superconducting 2SC+s quark matter and gapless modes at finite
  temperatures

abstract:
  We investigate the phase diagram of color superconducting quark matter with
strange quarks (2SC+s quark matter) in beta equliibrium at zero as well as
finite temperatures within a Nambu-Jona-Lasinio model. The variational method
as used here allows us to investigate simultaneous formation of condensates in
quark--antiquark as well as in diquark channels. Color and electric charge
neutrality conditions are imposed in the calculation of the thermodynamic
potential. Medium dependance of strange quark mass plays a sensitve role in
maintaining charge neutrality conditions. At zero temperature the system goes
from gapless phase to usual BCS phase through an intermediate normal phase as
density is increased. The gapless modes show a smooth behaviour with respect to
temperature vanishing above a critical temperature which is larger than the BCS
transition temperature. We observe a sharp transition from gapless
superconducting phase to the BCS phase as density is increased for the color
neutral matter at zero temperature. As temperature is increased this however
becomes a smooth transition.


title:
Electroweak Precision Observables in the Minimal Supersymmetric Standard
  Model

abstract:
  The current status of electroweak precision observables in the Minimal
Supersymmetric Standard Model (MSSM) is reviewed. We focus in particular on the
$W$ boson mass, M_W, the effective leptonic weak mixing angle, sin^2 theta_eff,
the anomalous magnetic moment of the muon, (g-2)_\mu, and the lightest CP-even
MSSM Higgs boson mass, m_h. We summarize the current experimental situation and
the status of the theoretical evaluations. An estimate of the current
theoretical uncertainties from unknown higher-order corrections and from the
experimental errors of the input parameters is given. We discuss future
prospects for both the experimental accuracies and the precision of the
theoretical predictions. Confronting the precision data with the theory
predictions within the unconstrained MSSM and within specific SUSY-breaking
scenarios, we analyse how well the data are described by the theory. The mSUGRA
scenario with cosmological constraints yields a very good fit to the data,
showing a clear preference for a relatively light mass scale of the SUSY
particles. The constraints on the parameter space from the precision data is
discussed, and it is shown that the prospective accuracy at the next generation
of colliders will enhance the sensitivity of the precision tests very
significantly.


title: Instantons and the large N_c limit, A.D. 2004

abstract:
  We review our current understanding of instanton effects in the large N_c
limit of QCD. We argue that the instanton liquid can have a smooth large N_c
limit which is in agreement with scaling relations derived from Feynman
diagrams. We also discuss certain limits of QCD, like the case of high baryon
density, in which the Witten-Veneziano relation can be derived from QCD and is
saturated by instantons.


title:
On the intrinsic limitation of the Rosenbluth method at large momentum
  transfer

abstract:
  Correlations in the elastic electron proton scattering data show that the
Rosenbluth method is not reliable for the extraction of the electric proton
form factors at large momentum transfer, where the magnetic term dominates, due
to the size and the $\epsilon$ dependence of the radiative corrections.


title:
$e^+e^-$ pair production in relativistic ions collision and its
  correspondence to electron-ion scattering

abstract:
  It is shown that the amplitudes of electron-ion scattering and $e^+e^-$ pair
production in the Coulomb field of two colliding ions are sxpressed in the
terms of electron scattering amplitudes in the fields of the individual ions
via the Watson expansion. We have obtained the compact expressions for these
amplitudes valid in the high energy limit and discuss the crossing symmetry
relations among the considered processes.


title: Pomeron Vertices in Perturbative QCD in Diffractive Scattering

abstract:
  We analyse the momentum space triple Pomeron vertex in perturbative QCD. In
addition to the standard form of this vertex which is used in the context of
total cross-sections at high energies and in the QCD reggeon field theory,
there exists an alternative form which has to be used in the study of high-mass
diffraction. We review and analyse the relation between these two versions. We
discuss some implications for the BK-equation. In the second part of our paper
we extend this analysis to the Pomeron-Odderon-Odderon vertex.


title:
Towards precision determination of the top quark mass from M_{bl}
  distribution in semi-leptonic decays

abstract:
  We explore a possibility of optimization of the method of determination of
the top quark mass from $M_{b\ell}$ distribution in semi-leptonic decays $t \to
b \ell\nu$ at LHC and a future linear collider (LC). We discover that the
systematic and statistical errors of $M_t$ determination can be diminished if
considering the high moments over the distribution. In the case of LHC this
allows one to reduce more than in twice the errors, and in the case of LC to
approach to the precision expected at studying the threshold scan of the total
cross-section $e^+e^- \to t\bar t$.


title:
Multiplicity fluctuations in hadron-hadron and nucleus-nucleus
  collisions and percolation of strings

abstract:
  We argue that recent NA49 results on multiparticle distributions and
fluctuations, as a function of the number of participant nucleons, suggest that
percolation plays an important role in particle production at high densities.


title: Mechanisms for $\chi_{cJ}\to \phi\phi$ Decays

abstract:
  Exclusive decays of $\chi_{cJ}(J=0,2)$ into $\phi\phi$ are investigated in
the framework of perturbative quantum chromodynamics(pQCD) and $\tpz$ quark
pair creation model. The results show that these two mechanisms exhibit a quite
different behavior in evaluating the decay width for the $\chi_{c0}$ and
$\chi_{c2}$. In pQCD method with nonrelativistic(NR) approximation, while the
calculated $\cxpp{2}$ decay width is comparable with measured one, the result
for the $\cxpp{0}$ decay width is suppressed and much smaller than experimental
value. However, in $\tpz$ quark pair creation model, the situation is reversed:
the decay width of $\cxpp{0}$ is greatly enhanced and can reproduce the large
measured value, while the contribution to the $\cxpp{2}$ decay width is small.
The results suggest that while the pQCD mechanism is the dominant mechanism for
$\cxpp{2}$ decay, the $\tpz$ quark pair creation mechanism is the dominant one
for $\cxpp{0}$ decay.


title: Constraints on top quark FCNC from electroweak precision measurements

abstract:
  We study the one-loop contributions of the effective flavor changing neutral
couplings (FCNC) tcZ and tcH on the electroweak precision observables Gamma_Z,
R_c, R_b, R_l, A_c and A^FB_c. Using the known experimental limits on these
observables, we may place 95% CL bounds on these FCNC couplings which in turn
translate into the following limits for the branching ratios: BR(t -> cZ) < 6.7
10^-2 and BR(t -> cH) < (0.09 - 2.9) 10^-3 for 114 < m_H < 170 GeV.


title: In Search of Lonely Top Quarks at the Tevatron

abstract:
  Single top-quark production, via weak-interaction processes, is an important
test of the standard model, potentially sensitive to new physics. However, it
is becoming known that this measurement is much more challenging at the
Tevatron than originally expected. We reexamine this process and suggest new
methods, using shape variables, that can supplement the methods that have been
discussed previously. In particular, by focusing on correlations and
asymmetries, we can reduce backgrounds substantially without low acceptance for
the signal. Our method also allows for a self-consistency check on the modeling
of the backgrounds. However, at the present time, serious systematic problems
remain, especially concerning the background from W-plus-jets; these must be
studied further by experimentalists and theorists alike.


title:
Inclusive Production of Four Charm Hadrons in e^+ e^- Annihilation at B
  Factories

abstract:
  Measurements by the Belle Collaboration of the exclusive production of two
charmonia in e^+ e^- annihilation differ substantially from theoretical
predictions. Till now, no conclusive explanation for this remarkable
discrepancy has been provided. Even the origin of the discrepancy is not
identified, yet. We suggest that the measurement of four-charm events in Belle
data must provide a strong constraint in identifying the origin of this large
discrepancy. Our prediction of the cross section for e^+e^- -> c c-bar c c-bar,
in lowest order in strong coupling constant, at sqrt{s}=10.6 GeV is about 0.1
pb. If measured four-charm cross section is compatible with the prediction
based on perturbative QCD, it is very likely that factorization of
hadronization process from perturbative part may be significantly violated or
there exists a new production mechanism. If the cross section for the
four-charm event is also larger than the prediction like that for the exclusive
J/psi+eta_c production, perturbative QCD expansion itself will be proved to be
unreliable and loses predictive power.


title: B-Meson Wavefunction in the Wandzura-Wilczek Approximation

abstract:
  The B-meson wavefunction has been studied with the help of the
vacuum-to-meson matrix element of the nonlocal operators in the heavy quark
effective theory. In order to obtain the Wandzura-Wilczek-type B-meson
wavefunction, we solve the equations which are derived from the equation of
motion of the light spectator quark in the B meson by using two different
assumptions. Under the condition that $\omega_0=2\bar{\Lambda}$, the solutions
for the B-meson wavefunction in this paper agree well with the one obtained by
directly taking the heavy quark limit $m_b\to\infty$. Our results show that the
equation of motion of the light spectator quark in the B meson can impose a
strong constraint on the B-meson wavefunctions $\Psi_\pm(\omega,z^2)$. Based on
the obtained results, we claim that both its distribution amplitudes
$\phi_B(\omega)$ and $\bar\phi_B(\omega)$ are important for calculating the B
meson decays.


title: Zero mode effect in the $1^{-+}$ four quark states

abstract:
  We calculate the masses of the $1^{-+}$ four quark states which decay
dominantly into $\rho\pi$ and $\eta\pi$ respectively by QCD sum rules approach.
We include the zero mode contribution and find it plays an important role in
the sum rules. We predict that the masses of the states $\eta\pi$ and $\rho\pi$
both are 1.4-1.5 GeV. This is close to the experimental candidates
$\pi_1(1370)$ and $\pi_1(1440)$.


title:
Contribution superstring Z' boson on the polarization effects in
  proton-proton collisions

abstract:
  In this work we investigate the single- and the double- spin asymmetries at
the collisions of polarized protons $pp \to (\gamma*, Z^0,Z')+X within the
scope of QCD, electroweak interaction and superstring E_6 theory. The helicity
amplitude method is used. Analytical expressions for the single- and the
double- spin asymmetries are obtained and their dependence from the transverse
momentum of lepton pair is investigated at the three different values of
invariant masses of lepton pair. Has been extracted pure contribution coming
from superstring Z' boson on the single- and double- spin asymmetries. The
obtained results allow to investigate the spin structure of the proton.


title:
k_perp-factorization for Hard Processes on Nuclei in the Saturation
  Regime

abstract:
  We discuss applications of the recently developed nonlinear
k_perp--factorization for hard processes on nuclei. The starting point is the
color dipole approach which allows to introduce the concept of a collective
unintegrated nuclear gluon distribution. We focus on single--jet spectra, which
depend on the collective nuclear glue in a nonlinear manner. We briefly comment
on the Cronin effect.


title: Probing lepton flavour violation in slepton NLSP scenarios

abstract:
  In supersymmetric models where the gravitino is the lightest superparticle,
the next-to-lightest superparticle (NLSP) is long-lived, and hence could be
collected and studied in detail. We study the prospects of direct detection of
lepton flavour violation in charged slepton NLSP decays. Mixing angles in the
slepton sector as small as ~ 3\times 10^{-2} (9\times 10^{-3}) could be probed
at the 90% confidence level if 3\times 10^3 (3\times 10^4) sleptons could be
collected.


title: Neutrino detectors for future experiments

abstract:
  We review detector technologies which are currently considered for ultimate
nucleon decay searches, new generation astrophysical neutrinos studies, and for
future long-baseline neutrino experiments at new high-intensity neutrino beam
facilities. We focus our discussion on Phase-II experiments with a timescale of
$10\simeq 20$ years. We point out that there are very few detector technologies
which are general purpose and versatile enough in order to potentially address
non-accelerator based physics and a large variety of future neutrino beam types
ranging from superbeams, betabeams and neutrino factories from subGeV to 10's
GeV energies.


title:
A general formalism for single and double spin asymmetries in inclusive
  hadron production

abstract:
  We present a calculation of single and double spin asymmetries for inclusive
hadron production in hadronic collisions. Our approach is based on Leading
Order (LO) perturbative QCD and generalized factorization theorems, with full
account of intrinsic parton momentum, k_T, effects. This leads to a new class
of spin and k_T-dependent distribution and fragmentation functions. Limiting
ourselves to consider leading twist functions, we show how they could play a
relevant role in producing non-vanishing spin asymmetries.


title:
Vector and axial-vector current correlators within the instanton model
  of QCD vacuum

abstract:
  The pion electric polarizability, \alpha^E_\pi^\pm, the leading order
hadronic contribution to the muon anomalous magnetic moment, $a_\mu^{hvp 1} $,
and the ratio of the difference to the sum of vector and axial-vector
correlators, (V-A)/(V+A), are found within the instanton model of QCD vacuum.
The results are compared with phenomenological estimates of these quantities
following from the ALEPH and OPAL data on vector and axial-vector spectral
densities.


title: K{\" a}hler Anomaly Effect in Anomaly Mediation Framework

abstract:
  We extend the anomaly mediation mechanism by including the effect due to K{\"
a}hler anomaly. We give a general method analyzing the soft breaking terms in
MSSM by introducing a set of parameters. One of the parameters describes the
magnitude of the K{\" a}hler contribution as opposed to the ordinary super-Weyl
contribution. The other parameters come from the so-called bilinear terms which
are added to the K{\" a}hler potential in order for the gauge singlet scalar
masses squared to be positive. We explore allowed regions of these parameters
by considering present experimental bound and present a new way of looking at
model building.


title: The inelastic photon-electron collisions with polarized beams

abstract:
  We discussed the photoproduction of pair of charged particles $a\bar{a}\quad
(a=e,\mu,\pi)$ as well as the double photon emission processes off an electron
accounting for the polarization of colliding particles. In the kinematics when
all the particles can be considered as a massless, we obtain the compact
analytical expressions for the differential cross sections of these processes.
As the application of obtained results the special cases of production by
circular and linear polarized photons are considered.


title: Hard exclusive production of a vector meson

abstract:
  The processes of a light neutral vector meson, V=\rho^0, \omega, \phi,
electroproduction and a heavy quarkonium, V=J/\Psi, \Upsilon, photoproduction
are studied in the framework of QCD factorization. We derive a complete set of
hard-scattering amplitudes which describe these processes at next-to-leading
order (NLO).


title:
Can the Collins mechanism explain the large transverse single spin
  asymmetries observed in p(transv. polarized) p --> pion X?

abstract:
  We present a calculation of inclusive polarised and unpolarised cross
sections within pQCD and the factorisation scheme, taking into account the
parton intrinsic motion, k_T, in distribution and fragmentation functions, as
well as in the elementary dynamics. We show, in contradiction with earlier
claims, that the Collins mechanism is suppressed and unable to explain the
large asymmetries found in p(transv. polarized) p --> pion X at moderate to
large Feynman x_F. The Sivers effect is not suppressed.


title: Quark Mass and the QCD Transition

abstract:
  We discuss different aspects of the quark mass dependence of the chiral and
deconfinement transitions. We make predictions for locating the deconfining
critical point, by analyzing the $m_q$ dependence of the ratio of imaginary and
real mass of the Polyakov loop. We then present an effective theory that allows
the extraction of coupling constants from available lattice data for the
temperature dependence of the chiral and Polyakov loop condensates at different
quark masses.


title: Phenomenology of SM and SUSY Higgs bosons at the LHC

abstract:
  I briefly review the physics of the Higgs sector in the Standard Model (SM)
and its supersymmetric extension, in particular the MSSM, and discuss the
prospects for discovering the Higgs particles at the Large Hadron Collider.
Some emphasis will be put on the theoretical developments which occurred in the
last few years.


title: Charge asymmetry and radiative phi decays

abstract:
  The study of radiative phi decays into scalar mesons, with subsequent decay
into pi pi gamma, constitutes an important topic at the electron-positron
collider DAPHNE. The interference of the respective amplitude with the one for
pi+ pi- gamma production, where the photon originates from initial state
radiation, will allow for unambiguous tests of models for the phi -> gamma
f0(-> pi pi) amplitude.
  The forward-backward asymmetry of charged pions, which is a clear signal of
such an interference, amounts up to 30 % and is at the same time quite
sensitive to the details of the various amplitudes.
  The results for several characteristic cases are presented and their
implementation into the Monte Carlo generator PHOKHARA is described.


title: Pentaquark Resonances from Collision Times

abstract:
  Having successfully explored the existing relations between the S-matrix and
collision times in scattering reactions to study the conventional baryon and
meson resonances, the method is now extended to the exotic sector. To be
specific, the collision time in various partial waves of K+ N elastic
scattering is evaluated using phase shifts extracted from the K+ N --> K+ N
data as well as from model dependent T-matrix solutions. We find several
pentaquark resonances including some low-lying ones around 1.5 to 1.6 GeV in
the P_01, P_03 and D_03 partial waves of K+ N elastic scattering.


title:
Two-Loop Relations for Heavy-Quark Parameters in the Shape-Function
  Scheme

abstract:
  Moments of the renormalized B-meson shape function provide a natural way to
define short-distance, running heavy-quark parameters such as the b-quark mass
and kinetic energy. These parameters are particularly well suited for studies
of inclusive decay distributions. The definitions of m_b and mu_pi^2 in this
``shape-function scheme'' are derived to two-loop order. Using previous
determinations of heavy-quark parameters in other schemes, we find
m_b=(4.63+-0.08) GeV and mu_\pi^2=(0.15+-0.07) GeV^2 at a reference scale of
1.5 GeV.


title: Energy Dependence of pp and p-carbon CNI analyzing power

abstract:
  The method described in my RHIC Spin Note (hep-ph/305085) is applied to
recently reported data from RHIC experiments in order to obtain values for the
spin-flip Regge couplings. The data comes from both 100 GeV/c proton elastic
scattering on a carbon target and on the recently commissioned polarized
hydrogen gas jet target. These couplings are used to predict the analyzing
power for proton-carbon scattering at the top RHIC fixed target energy of 250
GeV/c and for $pp$ scattering at RHIC collider energy.


title: Bose-Einstein or HBT correlations and the anomalous dimension of QCD

abstract:
  Bose-Einstein (or HBT) correlation functions are evaluated for the fractal
structure of QCD jets. These correlation functions have a stretched exponential
(or Levy-stable) form. The anomalous dimension of QCD determines the Levy index
of stability, thus the running coupling constant of QCD becomes measurable with
the help of two-particle Bose-Einstein correlation functions. These
considerations are tested on NA22 and UA1 two-pion correlation data.


title:
Spin transfer to $\Lambda_{c}^{+}$ hyperons in polarized proton
  collisions at RHIC

abstract:
  The analysis\cite{ohkuma:1} of helicity transfer to $\Lambda_{c}^{+}$ in
polarized proton collisions is extended to the proton helicity correlations
with the $\Lambda_{c}^{+}$ transverse polarization in the production plane
(parameter $D_{LS}$). The available spin transfer observables for the
collisions of {\em two} longitudinally polarized protons are evaluated. It is
shown that, in the central region at $\Lambda_{c}^{+}$ transverse momenta of a
few GeV/c, $D_{LS}$ parameters are of about the same size as the
helicity-to-helicity correlations. The methodical issue of using spin transfers
for cross-checks of systematic errors in cross-section $A_{LL}$ measurements at
polarized proton colliders is also briefly discussed.


title: Simple derivation of general Fierz-type identities

abstract:
  General Fierz-type identities are examined and their well known connection
with completeness relations in matrix vector spaces is shown. In particular, I
derive the chiral Fierz identities in a simple and systematic way by using a
chiral basis for the complex $4\times4$ matrices. Other completeness relations
for the fundamental representations of SU(N) algebras can be extracted using
the same reasoning.


title: Direct extraction of hadronic form factors from elastic-scattering data

abstract:
  Non-forward elastic hadron-scattering data are collected and analysed within
the Regge approach. Through an analysis of the data in small bins in $t$, we
have directly extracted the pomeron trajectory and the hadronic form factors
(or reggeon couplings). We found higher values than usually used for the
intercept and for the slope of the soft pomeron trajectory. The presence of
zeros in $t$ for the effective hadronic form factors is emphasised.


title: Large Extra Dimensions

abstract:
  The modern status of large extra dimensional (LED) approaches, highlights of
their manifestation and short prehistory are discussed in this paper.


title: Pion distribution amplitude -- from theory to data

abstract:
  We describe the present status of the pion distribution amplitude as
originated from two sources: (i) a nonperturbative approach, based on QCD sum
rules with nonlocal condensates, and (ii) a NLO QCD analysis of the CLEO data
on F^{\gamma\gamma^*\pi}(Q^2), supplemented by the E791 data on diffractive
dijet production, and the JLab F(pi) data on the pion electromagnetic form
factor.


title:
Special Supersymmetric features of large invariant mass unpolarized and
  polarized top-antitop production at LHC

abstract:
  We consider the top-antitop invariant mass distributions for production of
unpolarized and polarized top quark pairs at LHC, in the theoretical framework
of the MSSM. Assuming a "moderately" light SUSY scenario, we derive the leading
logarithmic electroweak contributions at one loop in a region of large
invariant mass, $M_{t\bar t}\simeq1$ TeV, for the unpolarized differential
cross section $d\sigma/dM_{t\bar t}$ and for the differential longitudinal top
polarization asymmetry $A_t(M_{t\bar t})$. We perform a realistic evaluation of
the expected uncertainties of the two quantities, both from a theoretical and
from an experimental point of view, and discuss the possibility of obtaining,
from accurate measurements of the two mass distributions, stringent consistency
tests of the model, in particular identifications of large $\tan\beta$ effects.


title: Theory of muonic hydrogen - muonic deuterium isotope shift

abstract:
  We calculate the corrections of orders alpha^3, alpha^4 and alpha^5 to the
Lamb shift of the 1S and 2S energy levels of muonic hydrogen (mu p) and muonic
deuterium (mu d). The nuclear structure effects are taken into account in terms
of the proton r_p and deuteron r_d charge radii for the one-photon interaction
and by means of the proton and deuteron electromagnetic form factors in the
case of one-loop amplitudes. The obtained numerical value of the isotope shift
(mu d) - (mu p) for the splitting (1S-2S) 101003.3495 meV can be considered as
a reliable estimation for corresponding experiment with the accuracy 10^{-6}.
The fine structure interval E(1S)-8E(2S) in muonic hydrogen and muonic
deuterium are calculated.


title: Physics at the CLIC Multi-TeV Linear Collider

abstract:
  This report summarizes a study of the physics potential of the CLIC e+e-
linear collider operating at centre-of-mass energies from 1 TeV to 5 TeV with
luminosity of the order of 10^35 cm^-2 s^-1. First, the CLIC collider complex
is surveyed, with emphasis on aspects related to its physics capabilities,
particularly the luminosity and energy, and also possible polarization,
\gamma\gamma and e-e- collisions. The next CLIC Test facility, CTF3, and its
R&D programme are also reviewed. We then discuss aspects of experimentation at
CLIC, including backgrounds and experimental conditions, and present a
conceptual detector design used in the physics analyses, most of which use the
nominal CLIC centre-of-mass energy of 3 TeV. CLIC contributions to Higgs
physics could include completing the profile of a light Higgs boson by
measuring rare decays and reconstructing the Higgs potential, or discovering
one or more heavy Higgs bosons, or probing CP violation in the Higgs sector.
Turning to physics beyond the Standard Model, CLIC might be able to complete
the supersymmetric spectrum and make more precise measurements of sparticles
detected previously at the LHC or a lower-energy linear e+e- collider:
\gamma\gamma collisions and polarization would be particularly useful for these
tasks. CLIC would also have unique capabilities for probing other possible
extensions of the Standard Model, such as theories with extra dimensions or new
vector resonances, new contact interactions and models with strong WW
scattering at high energies. In all the scenarios we have studied, CLIC would
provide significant fundamental physics information beyond that available from
the LHC and a lower-energy linear e+e- collider, as a result of its unique
combination of high energy and experimental precision.


title: Speculations in hadron spectroscopy

abstract:
  A selected survey is presented of the recent progress in hadron spectroscopy.
This includes spin-singlet charmonium states, excitations of charmonium and
open-charm mesons, double-charm baryons, and pentaquark candidates. Models
proposing exotic bound states or resonances are reviewed. The sector of exotic
mesons with two heavy quarks appears as particularly promising.


title: CP violation in B0_d --> tau+ tau- decays

abstract:
  Establishing CP violation in B0 (bar{B0}) --> l+ l- decays requires a
measurement of polarization of the final lepton pair, or a precise
determination of the B0 --> l+ l- and bar{B0} --> l+ l- rates. We first argue
that if the amplitudes of these decays are dominated by the scalar and
pseudoscalar Higgs penguin diagrams, as happens e.g. in supersymmetry with
large tan(beta), the CP asymmetries depend practically on only one CP violating
phase. This phase can be large, of the order of the CKM phase, leading to large
CP asymmetries in the tau+ tau- decay channel of B0_d (bar{B0}_d) mesons,
potentially measurable in BELLE or BABAR experiments. Secondly, we show that
the existing TAUOLA tau-lepton decay library supplemented by its universal
interface can efficiently be used to search for B0 (bar{B0}) --> tau+ tau-
decays, and to investigate how the CP asymmetry is reflected in realistic
experimental observables.


title:
Renormalization-Scheme-Independent Perturbation Theory by Resumming
  Logarithms

abstract:
  Results of perturbation theory in quantum field theory generally depend on
the renormalization scheme that is in use. In particular, they depend on the
scale. We try to make perturbation theory scheme invariant by re-expanding with
respect to a scheme invariant quantity. Furthermore, we investigate whether the
potentially large logarithms in such an expansion cause inaccuracy and how this
can be improved.


title: Vacuum Stability in Split Susy and Little Higgs Models

abstract:
  We study the stability of the effective higgs potential in the split
supersymmetry and Little Higgs models. In particular, we study the effects of
higher dimensional operators in the effective potential on the higgs mass
predictions. We find that the size and sign of the higher dimensional operators
can significantly change the higgs mass required to maintain vacuum stability
in Split Susy models. In the Little Higgs models the effects of higher
dimensional operators can be large because of a relatively lower cut-off scale.
Working with a specific model we find that a contribution from the higher
dimensional operator with coefficient of O(1) can destabilize the vacuum.


title: Relic neutrino clustering and implications for their detection

abstract:
  We study the gravitational clustering of big bang relic neutrinos onto
existing cold dark matter and baryonic structures within the flat $\Lambda$CDM
model. We then discuss the implications of clustering for scattering-based
relic neutrino detection methods, ranging from flux detection via
Cavendish-type torsion balances, to target detection using accelerator beams
and cosmic rays.


title: Split Supersymmetry at the Logarithmic Test of Future Colliders

abstract:
  We consider a large number of pair production processes at future colliders
(LHC, ILC) for values of the c.m. energy in the TeV range, where a logarithmic
expansion of Sudakov kind would provide a reliable description of Split
supersymmetric electroweak effects. We calculate all the leading and next to
leading terms of the expansions, that would differ drastically in the
considered domain from those of an extreme "light" scenario. We imagine then
two possible competitive future situations, at LHC and at ILC, where the
determination of the energy dependence of the cross sections of certain
processes could reveal a "signal" of the correct supersymmetric scheme.


title: Electroweak Absorptive Parts in NRQCD Matching Conditions

abstract:
  Electroweak corrections associated with the instability of the top quark to
the next-to-next-to-leading logarithmic (NNLL) total top pair threshold cross
section in e+e- annihilation are determined. Our method is based on absorptive
parts in electroweak matching conditions of the NRQCD operators and the optical
theorem. The corrections lead to ultraviolet phase space divergences that have
to be renormalized and lead to NLL mixing effects. Numerically, the corrections
can amount to several percent and are comparable to the known NNLL QCD
corrections.


title:
Two-Loop QCD Corrections to the Heavy Quark Form Factors: Axial Vector
  Contributions

abstract:
  We consider the Z Q Qbar vertex to second order in the QCD coupling for an
on-shell massive quark-antiquark pair and for arbitrary momentum transfer of
the Z boson. We present closed analytic expressions for the two
parity-violating form factors of that vertex at the two-loop level in QCD,
excluding the contributions from triangle diagrams. These form factors are
expressed in terms of 1-dimensional harmonic polylogarithms of maximum weight
4.


title:
Transverse structure of strong interactions at LHC: From diffraction to
  new particle production

abstract:
  We discuss the global structure of pp events at LHC with hard processes
(particle production in two-parton collisions) on the basis of the transverse
spatial characteristics of the partonic initial state. Studies of hard
exclusive processes in ep scattering have shown that the transverse area
occupied by partons with x >= 10^{-2} is much smaller than the size of the
nucleon as it appears in generic inelastic pp collisions at high energies
("two-scale picture"). We show that this is consistent with the observation
that the elastic pp amplitude at the Tevatron energy is close to the black body
limit at small impact parameters. Our picture implies that inclusive heavy
particle production (Higgs, SUSY) happens only in central pp collisions. At LHC
energies, the final state characteristics of such events are strongly
influenced by the approach to the black body limit, and thus may differ
substantially from what one expects based on the extrapolation of Tevatron
results. Our two-scale picture also allows us to analyze several types of hard
diffractive processes observable at LHC: i) Diffractive proton dissociation
into three jets, which probes small-size configurations in the proton wave
function; ii) exclusive diffractive Higgs production, in which we estimate the
rapidity gap survival probability; iii) inclusive diffractive processes.


title:
Study of V_LV_L to t tbar at the ILC Including O(alpha_s) QCD
  Corrections

abstract:
  In the event that the Higgs mass is large or that the electroweak
interactions are strongly interacting at high energy, top quark couplings to
longitudinal components of the weak gauge bosons could offer important clues to
the underlying dynamics. It has been suggested that precision measurements of
W_L W_L to t tbar and Z_L Z_L to t tbar might provide hints of new physics. In
this paper we present results of O(alpha_s) QCD corrections to V_LV_L to t tbar
scattering at the ILC. We find that corrections to cross sections can be as
large as 30% and must be accounted for in any precision measurement of VV to t
tbar.


title:
Brane world unification of quark and lepton masses and its implication
  for the masses of the neutrinos

abstract:
  A TeV-scale scenario is constructed in an attempt to understand the
relationship between quark and lepton masses. This scenario combines a model of
early (TeV) unification of quarks and leptons with the physics of large extra
dimensions. It demonstrates a relationship between quark and lepton mass scales
at rather ``low'' (TeV) energies which will be dubbed as {\em early
quark-lepton mass unification}. It also predicts that the masses of the
neutrinos are naturally light and Dirac. There is an interesting correlation
between neutrino masses and those of the unconventionally charged fermions
which are present in the early unification model. If these unconventional
fermions were to lie between 200 GeV and 300 GeV, the Dirac neutrino mass scale
is predicted to be between 0.07 eV and 1 eV.


title: Grand Unification in Higher Dimensions with Split Supersymmetry

abstract:
  We investigate gauge coupling unification in higher dimensional GUT models
with split supersymmetry. We focus on 5d and 6d orbifold GUTs, which permit a
simple solution to several problems of 4D GUTs as well as control over GUT
scale threshold corrections. In orbifold GUTs, calculable threshold corrections
can raise or lower the prediction for $\alpha_s(M_Z)$ in a way that depends on
the location of Higgs fields. On the other hand, split supersymmetry lowers the
prediction for $\alpha_s(M_Z)$. Consequently, split supersymmetry changes the
preferred location of the Higgs fields in orbifold GUTs. In the simplest
models, we find that gauge coupling unification favors higgs doublets that live
on the orbifold fixed points instead of in the bulk. In addition, relatively
high scales of supersymmetry breaking of $10^{10\pm 2}$ GeV are generically
favored.


title: The Supersymmetric Origin of Matter

abstract:
  The Minimal Supersymmetric extension of the Standard Model (MSSM) can provide
the correct neutralino relic abundance and baryon number asymmetry of the
universe. Both may be efficiently generated in the presence of CP violating
phases, light charginos and neutralinos, and a light top squark. Due to the
coannihilation of the neutralino with the light stop, we find a large region of
parameter space in which the neutralino relic density is consistent with WMAP
and SDSS data. We perform a detailed study of the additional constraints
induced when CP violating phases, consistent with the ones required for
baryogenesis, are included. We explore the possible tests of this scenario from
present and future electron Electric Dipole Moment (EDM) measurements, direct
neutralino detection experiments, collider searches and the b -> s gamma decay
rate. We find that the EDM constraints are quite severe and that electron EDM
experiments, together with stop searches at the Tevatron and Higgs searches at
the LHC, will provide a definite test of our scenario of electroweak
baryogenesis in the next few years.


title: What Black Holes Can Teach Us

abstract:
  Black holes merge together different field of physics. From General
Relativity over thermodynamics and quantum field theory, they do now also reach
into the regime of particle and collider physics. In the presence of additional
compactified dimensions, it would be possible to produce tiny black holes at
future colliders. We would be able to test Planck scale physics and the onset
of quantum gravity. The understanding of black hole physics is a key knowledge
to the phenomenology of these new effects beyond the Standard Model.
  This article gives a brief introduction into the main issues and is addressed
to a non-expert audience.


title: How robust is a 2SC quark matter phase under compact star constraints?

abstract:
  We study the phase structure and equation of state for two-flavor quark
matter at low temperature under compact star constraints within a nonlocal
chiral quark model. We find that the occurence of a two-flavor color
superconducting (2SC) phase is sensitive to variations of both the formfactor
of the interaction and the ratio \eta between the coupling constants in the
diquark and the scalar meson channels. Our study suggests that for standard
values of the coupling ratio 0.5<\eta<0.75 either the 2SC phase does not occur
(Gaussian formfactor) or it exists only in a mixed phase with normal quark
matter (NQ-2SC) with a volume fraction less than 20 - 40 %, occuring at high
baryon chemical potentials \mu_B >1200 MeV and most likely not relevant for
compact stars. We also present the relevant region of the phase diagram for
compact star applications and obtain that no gapless 2SC occurs at low
temperatures.


title: Perturbative, Non-Supersymmetric Completions of the Little Higgs

abstract:
  The little Higgs mechanism produces a light 100 GeV Higgs while raising the
natural cutoff from 1 TeV to 10 TeV. We attempt an iterative little Higgs
mechanism to produce multiple factors of 10 between the cutoff and the 100 GeV
Higgs mass in a perturbative theory. In the renormalizable sector of the
theory, all quantum corrections to the Higgs mass proportional to mass scales
greater than 1 TeV are absent -- this includes quadratically divergent,
log-divergent, and finite loops at all orders. However, even loops proportional
to scales just a factor of 10 above the Higgs (or any other scalar) mass come
with large numerical factors that reintroduce fine-tuning. Top loops, for
example, produce an expansion parameter of not 1/(4 pi) but 1/5. The geometric
increase in the number of fields at higher energies simply exacerbates this
problem. We build a complete two-stage model up to 100 TeV, show that direct
sensitivity of the electroweak scale to the cutoff is erased, and estimate the
tuning due to large numerical factors. We then discuss the possibility, in a
toy model with only scalar and gauge fields, of generating a tower of little
Higgs theories and show that the theory quickly becomes a large-N gauge theory
with ~ N fundamental scalars. We find evidence that at least this toy model
could successfully generate light scalars with an exponentially large cutoff in
the absence of supersymmetry or strong dynamics. The fine-tuning is not
completely eliminated, but evidence suggests that this result is model
dependent. We then speculate as to how one might marry a working tower of
fields of this type at high scales to a realistic theory at the weak scale.


title: Exclusive Production of the X(3872) in B Meson Decay

abstract:
  If the recently-discovered charmonium-like state X(3872) is a loosely-bound
S-wave molecule of the charm mesons D^0 \bar D^{*0} or D^{*0} \bar D^0, it can
be produced through the weak decay of the B meson into D^0 \bar D^{*0} K or
D^{*0} \bar D^0 K followed by the coalescence of the charm mesons at a
long-distance scale set by the scattering length of the charm mesons. The
long-distance factors in the amplitude for the decay B \to XK are determined by
the binding energy of X, while the short-distance factors are essentially
determined by the amplitudes for B \to D^0 \bar D^{*0} K and B \to D^{*0} \bar
D^0 K near the thresholds for the charm mesons. We obtain a crude determination
of the short-distance amplitudes by analyzing data from the Babar collaboration
on the branching fractions for B\to \bar D^{(*)} D^{(*)} K using a
factorization assumption, heavy quark symmetry, and isospin symmetry. The
resulting order-of-magnitude estimate of the branching fraction for B^+ \to X
K^+ is compatible with observations provided that J/\psi \pi^+ \pi^- is a major
decay mode of the X. The branching fraction for B^0 \to X K^0 is predicted to
be suppressed by more than an order of magnitude compared to that for B^+ \to X
K^+.


title: Discovering an Invisibly Decaying Higgs at Hadron Colliders

abstract:
  A Higgs boson lighter than 2 m_W that decays mostly into invisible channels
(e.g., dark matter particles) is theoretically well-motivated. We study the
prospects for discovery of such an invisible Higgs, h_inv, at the LHC and the
Tevatron in three production modes: (1) in association with a Z, (2) through
Weak Boson Fusion (WBF), and (3) accompanied by a jet. In the Z+h_inv channel,
we show that the LHC can yield a discovery signal above 5 sigma with 10 fb-1 of
integrated luminosity for a Higgs mass of 120 GeV. With 30 fb-1 the discovery
reach extends up to a Higgs mass of 160 GeV. We also study the extraction of
the h_inv mass from production cross sections at the LHC, and find that
combining WBF and Z+h_inv allows a relatively model-independent determination
of the h_inv mass with an uncertainty of 35-50 GeV (15-20 GeV) with 10 (100)
fb-1. At the Tevatron, a 3 sigma observation of a 120 GeV h_inv in any single
channel is not possible with less than 12 fb-1 per detector. However, we show
that combining the signal from WBF with the previously-studied Z+h_inv channel
allows a 3 sigma observation of h_inv with 7 fb-1 per detector. Because of
overwhelming irreducible backgrounds, h_inv+j is not a useful search channel at
either the Tevatron or the LHC, despite the larger production rate.


title: Magnetic moments of the pentaquarks

abstract:
  We present in this talk a recent analysis for the magnetic moments of the
baryon antidecuplet within the framework of the chiral quark-soliton model with
linear $m_s$ corrections considered. We take into account the mixing of higher
representations to the collective magnetic moment operator, which comes from
the SU(3) symmetry breaking. Dynamical parameters of the model are fixed by
experimental data for the magnetic moments of the baryon octet as well as by
the masses of the octet, decuplet and of $\Theta^{+}$. The magnetic moment of
$\Theta^{+}$ is rather sensitive to the pion-nucleon sigma term and ranges from
$-1.19 {\rm n.m.}$ to $-0.33 {\rm n.m.}$ as the sigma term is varied from
$\Sigma_{\pi N} = 45$ to 75 MeV, respectively. On top of them, we obtained that
the strange magnetic moment of the nucleon has the value of $\mu^{(s)}_N
=+0.39$ n.m. within this scheme and turns out to be almost independent of the
sigma term.


title: Narrow Width of Penta-Quark Baryons in QCD String Theory

abstract:
  Using the QCD string theory, we investigate the physical reason of the narrow
width of penta-quark baryons in terms of the large gluonic-excitation energy.
In the QCD string theory, the penta-quark baryon decays via a gluonic-excited
state of a baryon and meson system, where a pair of Y-shaped junction and
anti-junction is created. On the other hand, we find in lattice QCD that the
lowest gluonic-excitation energy takes a large value of about 1 GeV. Therefore,
in the QCD string theory, the decay of the penta-quark baryon near the
threshold is considered as a quantum tunneling process via a highly-excited
state (a gluonic-excited state), which leads to an extremely narrow decay width
of the penta-quark system.


title: Chiral symmetry and pentaquarks

abstract:
  Spontaneous chiral symmetry breaking, mesons and baryons are illustrated in
the language of the Dirac theory. Various forces acting between quarks inside
baryons are discussed. I explain why the naive quark models typically
overestimate pentaquark masses by some 500 MeV and why in the fully
relativistic approach to baryons pentaquarks turn out to be light. I discuss
briefly why it can be easier to produce pentaquarks at low than at high
energies.


title: A Realistic Superunification

abstract:
  It is argued that every quark flavor can be described as a lepton that has
been excited by the absorption of a supernatural field, which is defined. In
this context, a minimal irriducible representation of SUSY SU(5) is constructed
exclusively of the chiral modes that correspond to three generations of leptons
(or quarks) and their scaler superpartners. The proposed model predicts a new
quark; a left-handed (non-strange) version of the strange quark.


title: Notes on exotic anti-decuplet of baryons

abstract:
  We emphasize the importance of identifying non-exotic SU(3) partners of the
Theta^+ pentaquark, and indicate possible ways how to do it. We also use the
soliton picture of baryons to relate Reggeon couplings of various baryons.
These relations are used to estimate the Theta^+ production cross section in
high energy processes. We show that the corresponding cross sections are
significantly suppressed relative to the production cross sections of usual
baryons. Finally, we present spin non-flip form factors of the anti-decuplet
baryons in the framework of the chiral quark soliton model.


title:
Heavy quark and quarkonium production at CERN LEP2: k_T-factorization
  versus data

abstract:
  We present calculations of heavy quark and quarkonium production at CERN LEP2
in the k_T-factorization QCD approach. Both direct and resolved photon
contribution are taken into account. The conservative error analisys is
performed. The unintegrated gluon distribution in the photon is taken from the
full CCFM evolution equation. The traditional color-singlet mechanism to
describe non-perturbative transition of heavy quark pair into a final
quarkonium is used. Our analisys covers polarization properties of heavy
quarkonia at moderate and large transverse momenta. We find that the total and
differential open charm production cross sections are consistent with the
recent experimental data taken by the L3, OPAL and ALEPH collaborations. At the
same time the DELPHI data for the inclusive J/Psi production exceed our
predictions but experimental uncertainties are too large to claim a significant
inconsistency. The bottom production in photon-photon collisions at CERN LEP2
is hard to explain within the k_T-factorization formalism.


title: Coupled channel effects in pion pion S-wave interaction

abstract:
  We study coupled channel effects upon isospin I=2 and I=0 $\pi\pi$ S-wave
interaction. With introduction of the $\pi\pi\to\rho\rho\to\pi\pi$ coupled
channel box diagram contribution into $\pi\pi$ amplitude in addition to $\rho$
and $f_2 (1270)$ exchange, we reproduce the $\pi \pi$ I=2 S-wave and D-wave
scattering phase shifts and inelasticities up to 2 GeV quite well in a K-matrix
formalism. For I=0 case, the same $\pi\pi\to\rho\rho\to\pi\pi$ box diagram is
found to give the largest contribution for the inelasticity among all possible
coupled channels including $\pi\pi\to\omega\omega\to\pi\pi$, $\pi\pi\to K
\bar{K}\to\pi\pi$. We also show why the broad $\sigma$ appears narrower in
production processes than in $\pi\pi$ scattering process.


title: Lower bounds for open charm and beauty contributions to F_2

abstract:
  On the basis of some peculiar scaling properties of the OPE coefficient
functions, we give the lower bounds for F_2^{c\bar{c}} and F_2^{b\bar{b}}
independently of the properties of the gluon density function. Predictions for
F_2^{b\bar{b}} within reach of HERA are made.


title: Collider Phenomenology of the Higgsless Models

abstract:
  We identify and study the signatures of the recently proposed Higgsless
models at the Large Hadron Collider (LHC). We concentrate on tests of the
mechanism of partial unitarity restoration in the longitudinal vector boson
scattering, which is crucial to the phenomenological success of any Higgsless
model and does not depend on the model-building details. We investigate the
discovery reach for charged massive vector boson resonances and show that all
of the preferred parameter space will be probed with 100 inverse fb of LHC
data. Unitarity restoration requires that the masses and couplings of the
resonances obey certain sum rules. We discuss the prospects for their
experimental verification at the LHC.


title:
Muon pair production in proton-antiproton interactions at intermediate
  energies

abstract:
  We use PYTHIA event generator to simulate the process of muon pair production
in antiproton scattering upon the proton target at the energy of the antiproton
equal to $14GeV$, which may be one of the energies for the future PANDA (GSI,
Darmstadt) experiment operation.


title: Ghosts and Tachyons in the Fifth Dimension

abstract:
  We present several solutions for the five dimensional gravity models in the
presence of bulk ghosts and tachyons to argue that these "troublesome" fields
can be a useful model-building tool. The ghost-like signature of the kinetic
term for a bulk scalar creates a minimum in the scale factor, removing the
necessity for a negative tension brane in models with the compactified fifth
dimension. It is shown that the model with the positive tension branes and a
ghost field in the bulk leads to the radion stabilization. The bulk scalar with
the variable sign kinetic term can be used to model both positive and negative
tension branes of a finite width in the compact dimension. Finally, we present
several ghost and tachyon field configurations in the bulk that lead to the
localization of gravity in four dimensions, including one solution with the
Gaussian profile for the metric, g_{\mu\nu}(y)=\eta_{\mu\nu}\exp{-\alpha y^2},
which leads to a stronger localization of gravity than the Randall-Sundrum
model.


title: Off-Shell Extension of the Chiral Reduction Formula

abstract:
  We present a proper off-mass-shell extension of the chiral reduction formula
(CHRF) proposed by Yamagishi and Zaned. This is achieved by rewriting the CHRF
in a manifestly consistent form with the conventional LSZ reduction formula.


title:
Transverse Momentum Dependent Light-Cone Wave Function of B-Meson and
  Relation to the Momentum Integrated One

abstract:
  A direct generalization of the transverse momentum integrated(TMI) light-cone
wave function to define a transverse momentum dependent(TMD) light-cone wave
function will cause light-cone singularities and they spoil TMD factorization.
We motivate a definition in which the light-cone singularities are regularized
with non-light like Wilson lines. The defined TMD light-cone wave function has
some interesting relations to the corresponding TMI one. When the transverse
momentum is very large, the TMD light-cone wave function is determined
perturbatively in term of the TMI one. In the impact $b$-space with a small
$b$, the TMD light-cone wave function can be factorized in terms of the TMI
one. In this letter we study these relations. By-products of our study are the
renormalization evolution of the TMI light-cone wave function and the
Collins-Soper equation of the TMD light-cone wave function, the later will be
useful for resumming Sudakov logarithms.


title: On a model with two zeros in the neutrino mass matrix

abstract:
  We consider a Majorana neutrino mass matrix $\mathcal{M}_\nu$ with
$(\mathcal{M}_\nu)_{\mu\mu} = (\mathcal{M}_\nu)_{\tau\tau} = 0$, in the basis
where the charged-lepton mass matrix is diagonal. We show that this pattern for
the lepton mass matrices can be enforced by extending the Standard Model with
three scalar SU(2) triplets and by using a horizontal symmetry group
$\mathbbm{Z}_4$. The Ma--Sarkar (type-II seesaw) mechanism leads to very small
vacuum expectation values for the triplets, thus explaining the smallness of
the neutrino masses; at the same time, that mechanism renders the physical
scalars originating in the triplets very heavy. We show that the conditions
$(\mathcal{M}_\nu)_{\mu\mu} = (\mathcal{M}_\nu)_{\tau\tau} = 0$ allow both for
a normal neutrino mass spectrum and for an inverted one. In the first case, the
neutrino masses must be larger than $0.1 {eV}$ and the atmospheric mixing angle
$\theta_{23}$ must be practically equal to $45^\circ$. In the second case, the
product $\sin{\theta_{13}} | \tan{2 \theta_{23}} |$ must be of order one or
larger, thus correlating the large or maximal atmospheric neutrino mixing with
the smallness of the mixing angle $\theta_{13}$.


title:
Nuclear modification difference between u_v and d_v distributions and
  its relation to NuTeV sin^2 theta_W anomaly

abstract:
  We investigate a possible nuclear correction to the NuTeV measurement of the
weak-mixing angle sin^2 theta_W. In particular, a nuclear modification
difference between u_v and d_v distributions contributes to the NuTeV
measurement with the iron target. First, the modification differenceis
determined by a chi^2 analysis so as to reproduce nuclear data on the structure
function F_2 and Drell-Yan processes. Then, taking the NuTeV kinematics into
account, we calculate a contribution to the sin^2 theta_W determination. In
addition, its uncertainty is estimated by the Hessian method. Although the
uncertainty becomes comparable to the NuTeV deviation, the effect is not large
enough to explain the whole NuTeV sin^2 theta_W anomaly at this stage. However,
it is difficult to determine such a nuclear modification difference, so that we
need further investigations on the difference and its effect on the NuTeV
anomaly.


title: Dynamical Symmetry Breaking with Vector Bosons

abstract:
  In the standard model of electroweak interactions the Higgs doublet is
replaced by a complex vector doublet and a real vector singlet. The gauge
symmetry is broken dynamically by a mixed condensate of the doublet and singlet
vector fields. Gauge fields get their usual standard model masses by
condensation. The new vector matter fields become massive by their gauge
invariant selfcouplings and expected to have masses of few hundred GeV.
Fermions are assigned to the gauge group in the usual manner. Fermion masses
are coming from a gauge invariant fermion-vector field interaction by a mixed
condensat, the Kobayashi-Maskawa description is unchanged. Perturbative
unitarity estimates show that the model is valid up to 2-3 TeV. It is shown
that from the new matter fields a large number of spin-one particle pairs is
expected at future high energy e^{+}e^{-} linear colliders of 500-1500 GeV. The
inclusive production cross section of new particle pairs is presented for
hadron colliders, while at the Tevatron the new particle production is too low,
at the LHC the yield is large.


title:
Sea Quark Asymmetries in the Nucleon - A physical model for parton
  distributions in hadrons

abstract:
  A physical model for parton densities in hadrons, based on Gaussian momentum
fluctuations of partons and hadronic baryon-meson fluctuations, is presented.
The model has previously been shown to describe proton structure function data,
and is now applied to sea quark asymmetries and shown to describe the dbar-ubar
asymmetry of the proton. By considering fluctuations involving strange quarks,
the model gives an asymmetry between the momentum distributions of s and sbar,
which would reduce the significance of the NuTeV anomaly.


title: Role of the gluons in the color screening in a QCD plasma

abstract:
  The color screening in a QCD plasma, that was studied in a formulation making
evident similarities and differences with the electric case, is continued by
taking into account the contributions of real gluons. The results, which
include a numerical analysis not previously performed, show a damping of the
correlation function which, if not exponential, does not differ very much from
that form.
  The role of the temperature, which affect both the population and the
dynamics of the quark-gluon system, is found to be relevant.


title:
Invariants of Lepton Mass Matrices and CP and T Violation in Neutrino
  Oscillations

abstract:
  CP and T asymmetries in neutrino oscillations, in vacuum as well as in
matter, are expressed in terms of invariant functions of lepton mass matrices.


title:
Bounds on Cubic Lorentz-Violating Terms in the Fermionic Dispersion
  Relation

abstract:
  We study the recently proposed Lorentz-violating dispersion relation for
fermions and show that it leads to two distinct cubic operators in the
momentum. We compute the leading order terms that modify the non-relativistic
equations of motion and use experimental results for the hyperfine transition
in the ground state of the ${}^9\textrm Be^+$ ion to bound the values of the
Lorentz-violating parameters $\eta_1$ and $\eta_2$ for neutrons. The resulting
bounds depend on the value of the Lorenz-violating background four-vector in
the laboratory frame.


title: Brane necklaces and brane coils

abstract:
  We investigate the evolution of the networks of the cosmic strings in angled
brane inflation. We show how they can be distinguished from the conventional
ones. The cosmic strings in angled inflation are the daughter $D_{p-2}$ branes
that are extended between the mother $D_p$ branes. In the effective action, the
strings should have a moduli, since the endpoints of the $D_{p-2}$ branes can
move freely on the $D_p$ branes. Then naturally the position of the $D_{p-2}$
branes, which corresponds to the moduli of the $(1+1)$-dimensional effective
action, can vary along the cosmic strings. The variation of the moduli results
in the peculiar $(1+1)$-dimensional kink configurations. The kinks are the
monopoles on the strings. Therefore, the cosmic strings in angled inflation
become necklaces. The loops of the necklaces can shrink to produce stable
winding states, which look like coils. We show why the cosmological
implications of the brane necklaces are important. We point out that the cosmic
strings in generic models of brane inflation should become necklaces, depending
on the structure of the compactified space and the effective potential of the
model.


title:
Quarkonium bound state equation in the Wilson loop approach with minimal
  surfaces

abstract:
  Wilson loop averages are evaluated for large contours and in the large N
limit by means of minimal surfaces. This allows the study of the
quark-antiquark gauge invariant Green function through its dependence on Wilson
loops. A covariant bound state equation is derived which in the center-of-mass
frame and at equal-times takes the form of a Breit-Salpeter type equation. The
interaction potentials reduce in the static case to a confining linear vector
potential. For moving quarks, flux tube like contributions are present. The
nonrelativistic limit is considered.


title: New Source of CP violation in B physics ?

abstract:
  In this talk we discuss how the down type left-right squark mixing in
Supersymmetry can induce a new source of CP violation in the time dependent
asymmtries in B --> phi K process. We use QCD improved factorization process to
calculate the hadronic matrix element for the process and find the allowed
parameter space for $\rho $ and $\phi $, the magnitude and phase of the down
type LR(RL) squark mixing parameter $\delta^{bs}_{LR(RL)}$. In the same allowed
regin we calculate the expected CP asymmtries in the $B \to \phi K^{*}$
process.


title: The Interacting Gluon Model: a review

abstract:
  The Interacting Gluon Model (IGM) is a tool designed to study energy flow,
especially stopping and leading particle spectra, in high energy hadronic
collisions. In this model, valence quarks fly through and the gluon clouds of
the hadrons interact strongly both in the soft and in the semihard regime.
Developing this picture we arrive at a simple description of energy loss, given
in terms of few parameters, which accounts for a wide variety of experimental
data. This text is a survey of our main results and predictions.


title: Pion Photoproduction Amplitude Relations in the 1/N_c Expansion

abstract:
  We derive expressions for pion photoproduction amplitudes in the 1/N_c
expansion of QCD, and obtain linear relations directly from this expansion that
relate electromagnetic multipole amplitudes at all energies. The leading-order
relations in 1/N_c compare favorably with available data, while the
next-to-leading order relations seem to provide only a small improvement.
However, when resonance parameters are compared directly, the agreement at
O(1/N_c) or O(1/N_c^2) is impressive.


title: Light hadrons in 2+1 flavor lattice QCD

abstract:
  This talk will focus on recent results by the MILC collaboration from
simulations of light hadrons in 2+1 flavor lattice QCD. We have achieved high
precision results in the pseudoscalar sector, including masses and decay
constants, plus quark masses and Gasser-Leutwyler parameters from well
controlled chiral perturbation theory fits to our data. We also show
spectroscopy results for vector mesons and baryons.


title:
Role of Large Gluonic Excitation Energy for Narrow Width of Penta-Quark
  Baryons in QCD String Theory

abstract:
  We study the narrow decay width of low-lying penta-quark baryons in the QCD
string theoryin terms of gluonic excitations. In the QCD string theory, the
penta-quark baryon decays via a gluonic-excited state of a baryon and meson
system, where a pair of Y-shaped junction and anti-junction is created. Since
lattice QCD shows that the lowest gluonic-excitation energy takes a large value
of about 1 GeV, the decay of the penta-quark baryon near the threshold is
considered as a quantum tunneling process via a highly-excited state (a
gluonic-excited state) in the QCD string theory. This mechanism strongly
suppresses the decay and leads to an extremely narrow decay width of the
penta-quark system.


title: Remarks on the History of Quantum Chromodynamics

abstract:
  I make some remarks on events leading to the final formulation of quantum
chromodynamics, stimulated by the ``Search and Discovery''article by Bertram
Schwarzschild in the December, 2004 {\it Physics Today}. The following text and
references is being submitted as a letter to the editor of {\it Physics Today}.


title: The role of quark mass in cold and dense perturbative QCD

abstract:
  We consider the equation of state of QCD at high density and zero temperature
in perturbation theory to first order in the coupling constant $\alpha_s$. We
compute the thermodynamic potential including the effect of a non-vanishing
mass for the strange quark and show that corrections are sizable.
Renormalization group running of the coupling and the strange quark mass plays
a crucial role. The structure of quark stars is dramatically modified.


title:
Democratic mass matrices induced by strong gauge dynamics and large
  mixing angles for leptons

abstract:
  We consider dynamical realization of the democratic type Yukawa coupling
matrices as the Pendelton-Ross infrared fixed points.?Such fixed points of the
Yukawa couplings become possible by introducing many Higgs fields, which are
made superheavy but one massless mode. Explicitly, we consider a strongly
coupled GUT based on $SU(5) \times SU(5)$, where rapid convergence to the
infrared fixed point generates sufficiently large mass hierarchy for quarks and
leptons. Especially, it is found that the remarkable difference between mixing
angles in the quark and lepton sectors may be explained as a simple dynamical
consequence. We also discuss a possible scenario leading to the realistic mass
spectra and mixing angles for quarks and leptons. In this scheme, the Yukawa
couplings not only for top but also for bottom appear close to their
quasi-fixed points at low energy and, therefore, $\tan \beta$ should be large.


title: Neutrinoless double beta decay and direct searches for neutrino mass

abstract:
  Study of the neutrinoless double beta decay and searches for the
manifestation of the neutrino mass in ordinary beta decay are the main sources
of information about the absolute neutrino mass scale, and the only practical
source of information about the charge conjugation properties of the neutrinos.
Thus, these studies have a unique role in the plans for better understanding of
the whole fast expanding field of neutrino physics.