title: Renormalization flow of Yang-Mills propagators

abstract:
  We study Landau-gauge Yang-Mills theory by means of a nonperturbative vertex
expansion of the quantum effective action. Using an exact renormalization group
equation, we compute the fully dressed gluon and ghost propagators to lowest
nontrivial order in the vertex expansion. In the mid-momentum regime,
$p^2\sim\mathcal{O}(1)\text{GeV}^2$, we probe the propagator flow with various
{\em ans\"atze} for the three- and four-point correlations. We analyze the
potential of these truncation schemes to generate a nonperturbative scale. We
find universal infrared behavior of the propagators, if the gluon dressing
function has developed a mass-like structure at mid-momentum. The resulting
power laws in the infrared support the Kugo-Ojima confinement scenario.


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

abstract:
  We discuss about a possibility of large electroweak penguin contribution in B
-> K pi and pi pi from recent experimental data. The experimental data may be
suggesting that there are some discrepancies between the data and theoretical
estimation in the branching ratios of them. In B -> K pi decays, to explain it,
a large electroweak penguin contribution and large strong phase differences
seem to be needed. The contributions should appear also in B -> pi pi. We show,
as an example, a solution to solve the discrepancies in both B -> K pi and B ->
pi pi. However the magnitude of the parameters and the strong phase estimated
from experimental data are quite large compared with the theoretical
estimations. It may be suggesting some new physics effects are including in
these processes. We will have to discuss about the dependence of the new
physics. To explain both modes at once, we may need large electroweak penguin
contribution with new weak phases and some SU(3) breaking effects by new
physics in both QCD and electroweak penguin type processes.


title: Relativistic heavy ion physics: a theoretical overview

abstract:
  This is a mini-review of recent theoretical work in the field of relativistic
heavy ion physics. The following topics are discussed: initial conditions and
the Color Glass Condensate; approach to thermalization and the hydrodynamical
evolution; hard probes and the properties of the Quark-Gluon Plasma. Some of
the unsolved problems and potentially promising directions for future research
are listed as well.


title:
Parton intrinsic motion in inclusive particle production: unpolarized
  cross sections, single spin asymmetries and the Sivers effect

abstract:
  The relevance of intrinsic (or primordial) transverse momentum of partons in
the inclusive production of particles at high energy and moderately large p_T
has been known for a long time, beginning with Drell-Yan and diphoton
processes, and continuing with photon and meson production in hadronic
collisions. In view of its renewed interest in the context of polarized
processes and single spin asymmetries we perform, in the framework of
perturbative QCD with the inclusion of spin and transverse momentum effects, a
detailed analysis of several such processes in different kinematical
situations. We show that the inclusion of these effects leads, at the level of
accuracy reachable in this approach, to an overall satisfactory agreement
between theoretical predictions and experimental unpolarized data, thus giving
support to the study of spin effects and single spin asymmetries within the
same scheme. We present results for transverse single spin asymmetries,
generated by the so-called Sivers effect, in inclusive pion and photon
production in proton-proton collisions. We compare our results with the
available experimental data and with previous results obtained using simplified
versions of this approach.


title: Lifetimes of heavy hadrons

abstract:
  We review current status of theoretical predictions of lifetimes of heavy
hadrons in heavy-quark expansion. We present a calculation of subleading 1/m_b
corrections to spectator effects in the ratios of beauty hadron lifetimes. We
find that these effects are sizable and should be taken into account in
systematic analyses of heavy hadron lifetimes. In particular, the inclusion of
1/m_b corrections brings into agreement the theoretical predictions and
experimental observations of the ratio of lifetimes of Lambda_b-baryon and B_d
meson. We obtain \tau(B_u)/\tau(B_d) = 1.09 \pm 0.03, \tau(B_s)/\tau(B_d)= 1.00
\pm 0.01, \tau(\Lambda_b)/\tau(B_d)= 0.87 \pm 0.05.


title: Transient photon production in a QGP

abstract:
  We discuss the shortcomings of a formula that has been used in the literature
to compute the number of photons emitted by a hot or dense system during a
finite time, and show that the transient effects it predicts for the photon
rate are unphysical.


title:
New Predictions for generalized spin polarizabilities from heavy baryon
  chiral perturbation theory

abstract:
  We extract the next-to-next-to-leading order results for spin-flip
generalized polarizabilities (GPs) of the nucleon from the spin-dependent
amplitudes for virtual Compton scattering (VCS) at ${\cal O}(p^4)$ in heavy
baryon chiral perturbation theory. At this order, no unknown low energy
constants enter the theory, allowing us to make absolute predictions for all
spin-flip GPs. Furthermore, by using constraint equations between the GPs due
to nucleon crossing combined with charge conjugation symmetry of the VCS
amplitudes, we get a next-to-next-to-next-to-leading order prediction for one
of the GPs. We provide estimates for forthcoming double polarization
experiments which allow to access these spin-flip GPs of the nucleon.


title: Bounds on the Higgs Mass in Variations of Split Supersymmetry

abstract:
  We investigate the limits on the higgs mass in variations of Split
Supersymmetry, where the boundary value of the Higgs quartic coupling at the
SUSY breaking scale ($m_s$) is allowed to deviate from its value in the minimal
model of Arkani-Hamed and Dimopoulos. We show that it is possible for
$\lambda(m_s)$ to be negative and use vacuum stability to put a lower bound on
this coupling, and hence on the mass of the physical higgs. We also use the
requirement of perturbativity of all couplings up to the cutoff to determine an
upper limit for the higgs mass in models which are further modified by
additional matter content. For $m_s\geq 10^6$ GeV we find 110 GeV $\lesssim
m_h\lesssim 280$ GeV if the new matter is not coupled to any Standard Model
field; and 110 GeV $\lesssim m_h\lesssim 400$ GeV if it has Yukawa couplings to
the higgs.


title:
Dilepton low $p_T$ suppression as an evidence of the Color Glass
  Condensate

abstract:
  The dilepton production is investigated in proton-nucleus collisions in the
forward region using the Color Glass Condensate approach. The transverse
momentum distribution ($p_T$), more precisely the low $p_T$ region, where the
saturation effects are expected to increase, is analyzed. The ratio between
proton-nucleus and proton-proton differential cross section for RHIC and LHC
energies is evaluated, showing the effects of saturation at small $p_T$, and
presenting a Cronin type peak at moderate $p_T$. These features indicate the
dilepton as a most suitable probe to study the properties of the saturated
regime and the Cronin effect.


title: Z-prime Gauge Bosons at the Tevatron

abstract:
  We study the discovery potential of the Tevatron for a Z-prime gauge boson.
We introduce a parametrization of the Z-prime signal which provides a
convenient bridge between collider searches and specific Z-prime models. The
cross section for p pbar -> Z-prime X -> l^+ l^- X depends primarily on the
Z-prime mass and the Z-prime decay branching fraction into leptons times the
average square coupling to up and down quarks. If the quark and lepton masses
are generated as in the standard model, then the Z-prime bosons accessible at
the Tevatron must couple to fermions proportionally to a linear combination of
baryon and lepton numbers in order to avoid the limits on Z--Z-prime mixing.
More generally, we present several families of U(1) extensions of the standard
model that include as special cases many of the Z-prime models discussed in the
literature. Typically, the CDF and D0 experiments are expected to probe
Z-prime-fermion couplings down to 0.1 for Z-prime masses in the 500--800 GeV
range, which in various models would substantially improve the limits set by
the LEP experiments.


title:
Search for a light extra gauge boson in Littlest Higgs model at a linear
  collider

abstract:
  Littlest Higgs model predicts some extra particles beyond the Standard Model.
Among them, an extra neutral gauge boson A_H is lightest and its mass could be
a few hundred GeV. We study production and decay of A_H at future e^+ e^- inear
collider and compare them with those of Z' bosons in supersymmetric (SUSY) E_6
models. We find that, if the extra gauge boson mass is smaller than \sqrt{s} of
the linear collider, the forward-backward asymmetries of b- and c-quarks at the
A_H pole differ significantly from those given by the Z' bosons, and are useful
to test the littlest Higgs model and SUSY E_6 models.


title: Inclusive determinations of Vub and Vcb

abstract:
  In this talk I review the status of our ability to extract the CKM matrix
elements Vub and Vcb from inclusive semileptonic decays. I focus on model
independent determinations of these parameters and discuss the expected
theoretical uncertainties.


title:
Testing the Equivalent Photon Approximation of the Proton in the Process
  $e p\to \nu W X$

abstract:
  The accuracy of the equivalent photon approximation (EPA) of the proton in
describing the inelastic process $ep\to \nu W X$ is investigated. In
particular, the scale dependence of the corresponding inelastic photon
distribution is discussed. Furthermore, an estimate of the total number of
events, including the ones coming from the elastic and quasi-elastic channels
of the reaction, is given for the HERA collider.


title:
Theoretical predictions for the direct detection of neutralino dark
  matter in the NMSSM

abstract:
  We analyse the direct detection of neutralino dark matter in the framework of
the Next-to-Minimal Supersymmetric Standard Model. After performing a detailed
analysis of the parameter space, taking into account all the available
constraints from LEPII, we compute the neutralino-nucleon cross section, and
compare the results with the sensitivity of detectors. We find that sizable
values for the detection cross section, within the reach of dark matter
detectors, are attainable in this framework. For example, neutralino-proton
cross sections compatible with the sensitivity of present experiments can be
obtained due to the exchange of very light Higgses with $m_{h_1^0}\lsim 70$
GeV. Such Higgses have a significant singlet composition, thus escaping
detection and being in agreement with accelerator data. The lightest neutralino
in these cases exhibits a large singlino-Higgsino composition, and a mass in
the range $50\lsim m_{\tilde\chi_1^0}\lsim 100$ GeV.


title: Resonant \tau-Leptogenesis with Observable Lepton Number Violation

abstract:
  We consider a minimal extension of the Standard Model with one singlet
neutrino per generation that can realize resonant leptogenesis at the
electroweak scale. In particular, the baryon asymmetry in the Universe can be
created by resonant lepton-to-baryon conversion of an individual lepton number,
for example that of the $\tau$-lepton. The solar and atmospheric neutrino data
can be explained by a simple CP-violating Yukawa texture. The model has several
testable phenomenological implications. Most interestingly, it predicts heavy
Majorana neutrinos at the sub-TeV scale, which can be probed at $e^+e^-$ linear
colliders, as well as $e$- and $\mu$-lepton-number-violating processes, such as
$0\nu\beta\beta$ decay and $\mu \to e\gamma$, with rates that are within reach
of experimental sensitivity.


title: Size of Isospin Breaking in Charged K(L4) Decay

abstract:
  We evaluate the size of isospin breaking corrections to form factors $f$ and
$g$ of the $K_{\ell 4}$ decay process $K^+\to\pi^+\pi^-\ell^+\nu_{\ell}$ which
is actually measured by the extended NA48 setup at CERN. We found that, keeping
apart the effect of Coulomb interaction, isospin breaking does not affect
modules. This is due to the cancelation between corrections of electromagnetic
origin and those generated by the difference between up and down quark masses.
On the other hand, electromagnetism affects considerably phases if the infrared
divergence is dropped out using a minimal subtraction scheme. Consequently, the
greatest care must be taken in the extraction of $\pi\pi$ phase shifts from
experiment.


title: The Dirac field and the possible origin of gravity

abstract:
  The spin connections of the Dirac field have three ingredients that are
connected with the Ricci rotations, the Maxwell field, and an axial field which
minimally interacts with the axial current. I demonstrate that the axial field
provides an effective mechanism of auto-localization of the Dirac field into
compact objects. The condition that these objects are stable (the
energy-momentum is self-adjoint) leads to Einstein's field equations. The Dirac
field with its spin connection seem to be a natural material carrier of the
space-time continuum in which compact objects are moving along geodesic lines.
The long distance effect of the axial field is indistinguishable from Newton's
gravity, which reveals the microscopic nature of gravity and the origin of the
gravitational mass.


title: Extended Rein-Sehgal model for tau lepton production

abstract:
  The polarization density matrix formalism is employed to include the final
lepton mass and spin into the popular model by Rein and Sehgal for single pion
neutrinoproduction. We investigate the effect of the $\tau$ lepton mass on the
differential cross sections. The lepton polarization evaluated within the
extended RS model is compared against that follows from the single resonance
production model based upon the Rarita-Schwinger formalism with
phenomenological transition form factors.


title: Tau lepton polarization in quasielastic neutrino-nucleon scattering

abstract:
  We derive structure functions for the quasielastic production of octet
baryons in neutrino and antineutrino interactions with nucleons and study the
polarization of tau leptons produced in the $\Delta{Y}=0$ reactions. Possible
impact of the charged second-class currents is investigated by adopting a
simple phenomenological parametrization for the nonstandard scalar and tensor
nucleon form factors. Our choice of the unknown parameters is made to satisfy
the limits obtained in the (anti)neutrino scattering experiments and rigid
restrictions derived from the nuclear structure studies.


title: Neutrino Propagation and Oscillations in a Strong Magnetic Field

abstract:
  We review the results on neutrino propagation in neutral and charged media
under strong magnetic fields $M_{W}^{2}\gg B\gg m_{e}^{2}$. It is shown that
the neutrino energy density gets a magnetic contribution in both charged and
neutral media, which is linear in the magnetic field, of first order in
$G_{F}$, and independent of the charge density. This new term enters as a
correction to the neutrino kinetic energy and produces an anisotropic
contribution to the neutrino index of refraction. As a consequence, in a
neutral medium a highly anisotropic resonant level-crossing condition takes
place for the oscillation between electron-neutrinos and the other neutrino
species. Possible cosmological applications are presented.


title:
Structures of Expectation Values of Flavor Neutrino Charges with Respect
  to Neutrino-Source Hadrons

abstract:
  In the framework of quantum field theory, we examine what physical
implications are included in the expectation values of the flavor neutrino
charges at the time $x^0$ with respesct to the state $\ket{\Psi(x^0)}$, which
is taken so as to coincide with the neutrino source state such as a charged
pion at the time $x^0_I$ ($< x^0$).


title: Chiral Mesons in Hot Matter

abstract:
  We review our recent work on thermal meson properties within the Chiral
Perturbation Theory framework. We will focus on the pion electromagnetic form
factor, stressing its importance for Relativistic Heavy Ion Collisions. We
obtain model-independent predictions (based only on chiral symmetry) such as
the temperature dependence of the pion electromagnetic charge radius. Imposing
unitarity allows to describe the thermal effects of resonances such as the
$\rho$ meson.


title: Studies of Top Quark properties at the LHC

abstract:
  The LHC collider plans to start in 2007, after which millions of top quarks
will be produced at the collision points. In the first period of data taking
these events will provide an essential calibration tool for the ATLAS and CMS
detectors. During a later stage, as part of the precision measurement
programme, both detectors will determine the top mass and properties like spin,
charge and couplings. Top physics also plays a central role in the search for
new particles, both as source of a possible signal and as source of
background.}


title: Low x particle spectra in the Modified Leading Logarithm Approximation

abstract:
  We show that the higher moments of the evolution obtained from the Modified
Leading Logarithm Approximation may be regarded as spurious higher order terms
in perturbation theory, and that neglecting them leads to a good description of
the data around and above the peak in $\xi=\ln (1/x)$. Furthermore, we use this
study of the moments to show that at high energy the Limiting Spectrum with
Local Parton-Hadron Duality may also be derived from the Modified Leading
Logarithm Approximation without any non-perturbative assumptions.


title:
Evolution of high-mass diffraction from the light quark valence
  component of the pomeron

abstract:
  We analyze the contribution from excitation of the $(q\bar q)(f\bar f),(q\bar
q)g_1...g_n(f\bar f)$ Fock states of the photon to high mass diffraction in
DIS. We show that the large $Q^2$ behavior of this contribution can be
described by the DLLA evolution from the non-perturbative $f\bar f$ valence
state of the pomeron. Although of higher order in pQCD, the new contribution to
high-mass diffraction is comparable to that from the excitation of the $q\bar q
g$ Fock state of the photon.


title:
Lambda-based QCD perturbation theory-: sidestepping the
  scheme-dependence problem

abstract:
  We advocate the replacement of standard alphas(mu)-based QCD perturbation
theory, in which the coupling and truncated perturbative predictions are
dependent on the chosen renormalisation scheme, by a Lambda-based approach in
which QCD observables are directly related to the dimensional transmutation
parameter, Lambda, of the theory. The shortcomings of the standard approach are
emphasised by formulating it in the Lambda-based language. We show how the
Lambda-based approach can be extended to include massive quarks. We also
consider the use of Lambda-based perturbation theory in the case when a
resummation of large infrared logarithms is required, performing a
phenomenological analysis for the e+e- event shape observables thrust and heavy
jet mass. We show by fitting to data that smaller power corrections are
required than in the standard approach.


title:
Some Novel Contributions to Radiative B Decay in Supersymmetry without
  R-parity

abstract:
  We present a systematic analysis at the leading log order of the influence of
combination of bilinear and trilinear R-parity violating couplings on the decay
b-->s gamma. Such contributions have never been explored in the context of this
decay. We show that influence of charged-slepton-Higgs mixing mediated loops
can dominate the SM and MSSM contributions and hence can provide strong bounds
on the combination of bilinear-trilinear R-parity violating couplings. Such
contributions are also enhanced by large tan beta. With substantially extended
basis of operators (28 operators), we provide illustrative analytical formulae
of the major contributions to complement our complete numerical results which
demonstrate the importance of QCD running effects.


title: Volume Dependence of the Pion Mass in the Quark-Meson-Model

abstract:
  We consider the quark-meson-model in a finite three-dimensional volume using
the Schwinger proper-time renormalization group. We derive and solve the flow
equations for finite volume in local potential approximation. In order to break
chiral symmetry in the finite volume, we introduce a small current quark mass.
The corresponding effective meson potential breaks chiral O(4) symmetry
explicitly, depending on sigma and pion fields separately. We calculate the
volume dependence of the pion mass and of the pion decay constant with the
renormalization group flow equations and compare with recent results from
chiral perturbation theory in a finite volume.


title: Unintegrated gluon distribution from modified BK equation

abstract:
  We investigate the recently proposed nonlinear equation for the unintegrated
gluon distribution function which includes the subleading effects at small $x$.
We obtained numerically the solution to this equation in $(x,k)$ space, and
also the integrated gluon density. The subleading effects affect strongly the
normalization and the $x$ and $k$ dependence of the gluon distribution. We show
that the saturation scale $Q_s(x)$, which is obtained from this model, is
consistent with the one used in the saturation model by Golec-Biernat and
W\"usthoff. We also estimate the nonlinear effects by looking at the relative
normalization of the solutions to the linear and nonlinear equations. It turns
out that the differences are quite large even in the nominally dilute regime,
that is when $Q^2 \gg Q_s^2$. Finally, we calculate the dipole-nucleon cross
section.


title: Prospects for Sparticle Discovery in Variants of the MSSM

abstract:
  We discuss the prospects for detecting supersymmetric particles in variants
of the minimal supersymmetric extension of the Standard Model (MSSM), in light
of laboratory and cosmological constraints. We first assume that the lightest
supersymmetric particle (LSP) is the lightest neutralino chi, and present
scatter plots of the masses of the two lightest visible supersymmetric
particles when the input scalar and gaugino masses are constrained to be
universal (CMSSM), when the input Higgs scalar masses are non-universal (NUHM),
and when the squark and slepton masses are also non-universal and the MSSM is
regarded as a low-energy effective field theory valid up to the GUT scale
(LEEST) or just up to 10 TeV (LEEST10). We then present similar plots in
various scenarios when the LSP is the gravitino. We compare the prospects for
detecting supersymmetry at linear colliders (LCs) of various energies, at the
LHC, and as astrophysical dark matter. We find that, whilst a LC with a
centre-of-mass energy E_{CM} <= 1000 GeV has some chance of discovering the
lightest and next-to-lightest visible supersymmetric particles, E_{CM} >= 3000
GeV would be required to `guarantee' finding supersymmetry in the neutralino
LSP scenarios studied, and an even higher E_{CM} might be required in certain
gravitino dark matter scenarios. Direct dark matter experiments could explore
part of the low-mass neutralino LSP region, but would not reveal all the models
accessible to a low-energy LC.


title:
Photon production in relativistic nuclear collisions at SPS and RHIC
  energies

abstract:
  Chiral Lagrangians are used to compute the production rate of photons from
the hadronic phase of relativistic nuclear collisions. Special attention is
paid to the role of the pseudovector a_1 meson. Calculations that include
reactions with strange mesons, hadronic form factors and vector spectral
densities consistent with dilepton production, as well as the emission from a
quark-gluon plasma and primordial nucleon-nucleon collisions, reproduce the
photon spectra measured at the Super Proton Synchrotron (SPS). Predictions for
the Relativistic Heavy Ion Collider (RHIC) are made.


title: Neutralino Relic Density in a Supersymmetric U(1)' Model

abstract:
  We study properties of the lightest neutralino (\chi) and calculate its
cosmological relic density in a supersymmetric U(1)' model with a secluded
U(1)' breaking sector (the S-model). The lightest neutralino mass is smaller
than in the minimal supersymmetric standard model; for instance, m_\chi < 100
GeV in the limit that the U(1)' gaugino mass is large compared to the
electroweak scale. We find that the Z-\chi-\chi coupling can be enhanced due to
the singlino components in the extended neutralino sector. Neutralino
annihilation through the Z-resonance then reproduces the measured cold dark
matter density over broad regions of the model parameter space.


title: The 35-plet Baryons from Chiral Soliton Models

abstract:
  We investigate the 35-plet baryons from the chiral soliton models. We find
that the coupling constant for the decay of 35-plet baryons with spin 3/2 to
the decuplet baryons is surprisingly small, but that for the decay to 27-plet
baryons with spin 3/2 is larger. We give all the masses and widths of 35-plet
baryons with spin 5/2 and suggest candidates for all nonexotic members from the
available particle listings. We also focus on $\Delta_{5/2}$ and $\Theta_2$,
which are the lightest two baryons of 35-plet with spin 5/2 and with simplest
minimal pentaquark configurations. Calculations show that
$\Gamma_{\Delta_{5/2}}<$380 MeV, compared with the results from SU(2) Skyrme
Model ($\Gamma_{\Delta_{5/2}}>$800 MeV), and $\Gamma_{\Theta_{2}}<100$ MeV if
we assume that their widths are dominated by two-body decay and that $\Theta^+$
has a width $\Gamma_{\Theta^+}<25$ MeV.


title: Fragmentation Production of Omega_ccc and Omega_bbb Baryons

abstract:
  The Lambda baryons with a single heavy flavor which transfer the quark
polarization, have been studied both theoretically and experimentally. The Xi's
with two heavy constituents are well treated in quark-diquark model. In this
work we study the production of triply heavy baryons in the perturbative QCD
regime and calculate the fragmentation functions for Omega_ccc and Omega_bbb in
the c and b quark fragmentation, respectively. We then obtain the total
fragmentation probability and the average fragmentation parameter for each
case.


title:
Non-vanishing $U_{e3}$ and $\cos{2 \theta_{23}}$ from a broken $Z_2$
  symmetry

abstract:
  It is shown that the neutrino mass matrices in the flavour basis yielding a
vanishing $U_{e3}$ are characterized by invariance under a class of $Z_2$
symmetries. A specific $Z_2$ in this class also leads to a maximal atmospheric
mixing angle $\theta_{23}$. The breaking of that $Z_2$ can be parameterized by
two dimensionless quantities, $\e$ and $\e'$; the effects of $\e, \e' \neq 0$
are studied perturbatively and numerically. The induced value of $\ue3$
strongly depends on the neutrino mass hierarchy. We find that $\ue3$ is less
than 0.07 for a normal mass hierarchy, even when $\e, \e' \sim 30 %$. For an
inverted mass hierarchy $\ue3$ tends to be around 0.1 but can be as large as
0.17. In the case of quasi-degenerate neutrinos, $\ue3$ could be close to its
experimental upper bound 0.2. In contrast, $| \cos{2\theta_{23}} |$ can always
reach its experimental upper bound 0.28. We propose a specific model, based on
electroweak radiative corrections in the MSSM, for $\e$ and $\e'$. In that
model, both $\ue3$ and $| \cos{2 \theta_{23}} |$, could be close to their
respective experimental upper bounds if neutrinos are quasi-degenerate.


title: Regge Trajectories Analysis to DsJ(2317), DsJ(2460) and DsJ(2632) Mesons

abstract:
  Status of investigations of the new observed charmed strange mesons
DsJ(2317), DsJ(2460) and DsJ(2632) is simply listed. A systemic classification
to these states with Regge trajectories was made. We found that DsJ(2317) and
DsJ(2460) are reasonable to be arranged as (0^+,1^+), but DsJ(2632) seems not
possible to be an orbital excited tensor particle. As a byproduct, the
non-strange charmed mesons including D'1(2427) and D*(2637) were analyzed also.


title: $K_L \to \pi^0 \nu \bar{\nu}$ in Little Higgs model

abstract:
  Little Higgs models provides us a new solution of the {\it hierarchy problem}
of the SM. The problem is associated with the large difference in scales of SM
and plank scale. One of the main features of these models is the existence of a
vector like top quark. The CP violating $K_L \to \pi^0 \nu \bar{\nu}$ process n
the SM model is dominated by top quark penguin & box graphs. We examine this
process in the Little Higgs model where the top quark sector has significant
differences from the Standard Model.


title: Comments on a Flavor Symmetry

abstract:
  It is pointed out that if a flavor symmetry (a discrete symmetry, a U(1)
symmetry, and so on) exists, we cannot obtain the observed CKM quark mixing
matrix V_q and MNS lepton mixing matrix U_\ell, even if we can obtain
reasonable mass spectra under the symmetry. Such the serious constraint is
derived only from the SU(2)_L conditions, and we will not assume any explicit
flavor symmetry and/or any explicit mass matrix forms. And then, we will
discuss the meaning of the severe constraint.


title: Quark regge trajectory in two loops from unitarity relations

abstract:
  The two-loop quark Regge trajectory is obtained at arbitrary space-time
dimension D using the s-channel unitarity conditions. Although explicit
calculations are performed for massless quarks, the method used allows to find
the trajectory for massive quarks as well. At D->4 the trajectory turns into
one derived earlier from the high-energy limit of the two-loop amplitude for
the quark-gluon scattering. The comparison of two expressions, obtained by
quite different methods, serves as a strict cross check of many intermediate
results used in the calculations, and their agreement gives a strong evidence
of accuracy of these results.


title: Snowmass Benchmark Points and Three-Loop Running

abstract:
  We present the full three-loop beta-functions for the MSSM generalised to
include additional matter multiplets in 5, 10 representations of SU(5). We
analyse in detail the effect of three-loop running on the sparticle spectrum
for the MSSM Snowmass Benchmark Points. We also consider the effect on these
spectra of additional matter multiplets (the semi-perturbative unification
scenario).


title: Saturation and non-linear effects in diffractive processes

abstract:
  Through a direct implementation of the saturation regime resulting from the
unitarity limit in the impact parameter representation, we explore various
possibilities for the energy dependence of hadronic scattering. We show that it
is possible to obtain a good description of the scattering amplitude from a
hard pomeron provided one includes non-linear effects.


title: Analytical approach to SU(2) Yang-Mills thermodynamics

abstract:
  We propose an analytical approach to SU(2) Yang-Mills thermodynamics. The
existence of a macroscopic and rigid adjoint Higgs field, generated by dilute
trivial-holonomy calorons at large temperature $T$ (electric phase), implies a
twofold degeneracy of the ground state which signals a broken electric $Z_2$
symmetry. A finite energy density $\propto T$ of the ground state arises due to
caloron interaction. An evolution equation for the effective gauge coupling,
derived from thermodynamical self-consistency, predicts a second-order like
transition (seen in lattice simulations) at $T_c$ to a phase where monopoles
are condensed and off-Cartan excitations decoupled. In this magnetic phase the
ground state is unique and dominates the pressure (negative total pressure).
While the magnetic phase has a massive, propagating 'photon' it confines
fundamental matter (pre-confinement). The temperature dependence of the
magnetic gauge coupling predicts the transition to the confining phase at
$T_C\sim \frac{T_c}{1.9}$ where center-vortex loops condense and the 'photon'
decouples. We believe that this transition is 'swallowed' by finite-size
artefacts in lattice simulations. No thermodynamical connection exists between
the confining and the magnetic phase.


title:
Constraints on proton structure from precision atomic physics
  measurements

abstract:
  Ground-state hyperfine splittings in hydrogen and muonium are very well
measured. Their difference, after correcting for magnetic moment and reduced
mass effects, is due solely to proton structure--the large QED contributions
for a pointlike nucleus essentially cancel. The rescaled hyperfine difference
depends on the Zemach radius, a fundamental measure of the proton, computed as
an integral over a product of electric and magnetic proton form factors. The
determination of the Zemach radius, (1.043 +/- 0.016) fm, from atomic physics
tightly constrains fits to accelerator measurements of proton form factors.
Conversely, we can use muonium data to extract an ``experimental'' value for
QED corrections to hydrogenic hyperfine data; we find that measurement and
theory are consistent.


title: How to study weakly coupled neutral vector bosons

abstract:
  A weakly coupled new neutral gauge boson, forming a narrow resonance, can be
efficiently produced at e+e- colliders through radiative return processes if
the collider energy is larger than the gauge boson mass. This contribution
analyzes the sensitivity of a future linear collider for weakly coupled gauge
bosons and briefly discusses how, in case of discovery, its properties can be
determined with high precision.


title: Obtaining alpha from B-->rho+- pi-+

abstract:
  We discuss how to extract the weak phase alpha from present data on B-->
rho+- pi-+ decays. Introducing alpha_{eff} and constraining the difference from
alpha using flavor SU(3), one arrives at alpha=(95+- 16) degrees, if a testable
assumption of a small relative strong phase between the two relevant tree
amplitudes is employed to distinguish between discrete ambiguities. On the long
run we advocate the combined fit to B--> rho+- pi-+ and SU(3) related modes.
The effect of SU(3) breaking in this approach is expected to be small, because
of relatively small penguin pollution.


title: Flavor Structure of Warped Extra Dimension Models

abstract:
  We recently showed, in hep-ph/0406101, that warped extra dimensional models
with bulk custodial symmetry and few TeV KK masses lead to striking signals at
$B$-factories. In this paper, using a spurion analysis, we systematically study
the flavor structure of models that belong to the above class. In particular we
find that the profiles of the zero modes, which are similar in all these
models, essentially control the underlying flavor structure. This implies that
our results are robust and model independent in this class of models. We
discuss in detail the origin of the signals in B-physics. We also briefly study
other NP signatures that arise in rare K decays ($K \to \pi \nu \nu$), in rare
top decays [$t \to c \gamma (Z, gluon)$] and the possibilty of CP asymmetries
in $D^0$ decays to CP eigenstates such as $K_S \pi^0$ and others. Finally we
demonstrate that with light KK masses, $\sim3$ TeV, the above class of models
with anarchic $5D$ Yukawas has a ``CP problem'' since contributions to the
neutron electric dipole moment are roughly 20 times larger than the current
experimental bound. Using AdS/CFT correspondence, these extra-dimensional
models are dual to a purely 4D strongly coupled conformal Higgs sector thus
enhancing their appeal.


title: Nuclear corrections of parton distribution functions

abstract:
  We report global analysis results of experimental data for nuclear
structure-function ratios F_2^A/F_2^{A'} and proton-nucleus Drell-Yan
cross-section ratios sigma_{DY}^{pA}/sigma_{DY}^{pA'} in order to determine
optimum parton distribution functions (PDFs) in nuclei. An important point of
this analysis is to show uncertainties of the distributions by the Hessian
method. The results indicate that the uncertainties are large for gluon
distributions in the whole x region and for antiquark distributions at x>0.2.
We provide a code for calculating any nuclear PDFs at given x and Q^2 for
general users. They can be used for calculating high-energy nuclear reactions
including neutrino-nucleus interactions, which are discussed at this workshop.


title:
The DsJ*(2317) and DsJ(2460) mesons in U~(12)-classification scheme of
  hadrons

abstract:
  The narrow mesons, DsJ*(2317) and DsJ(2460), observed recently in the final
states Ds+ pi0 and Ds*+ pi0 are pointed out to be naturally assigned as the
ground-state scalar and axial-vector chiral states in the csbar system, which
would newly appear in the covariant U~(12) hadron-classification scheme
proposed a few years ago. We predict the comparatively large electromagnetic
decay widths to other models, which are due to the intrinsic electric dipole
moment. The SELEX state DsJ(2632) is also able to be assigned to the P-wave
chiral state with JP=1- in the U~(12)-classification scheme.


title:
Top quark pair + jet production at next-to-leading order: NLO QCD
  corrections to gg -> t tbar g

abstract:
  The reaction pp/pbar p -> t tbar jet+X is an important background process for
Higgs boson searches in the mass range below 200 GeV. Apart from that it is
also an ideal laboratory for precision measurements in the top quark sector.
Both applications require a solid theoretical prediction, which can be achieved
only through a full next-to-leading order (NLO) calculation. In this work we
describe the NLO computation of the subprocess gg -> t tbar g.


title:
Measurement of Squark Flavor Mixings in Supersymmetric Models at Super B
  Factory

abstract:
  We discuss potential to measure squark flavor mixings based on future data at
super B factory and LHC. In particular we focus on the imaginary part of the
mixings by investigating the CP violating observables. As a result, we find
they are determined with the uncertainty about 10 % at best.


title: SO(10) Symmetry Breaking and Type II Seesaw

abstract:
  A minimal SO(10) model with {\bf 126} Higgs field breaking B-L symmetry has
been shown recently to predict large solar and atmospheric mixings in agreement
with observations if it is assumed that the neutrino mass follows from the
triplet dominated type II seesaw formula. No additional symmetries need to be
assumed for this purpose. We discuss the conditions on the way SO(10) symmetry
breaks down to MSSM and the Higgs multiplets in the model, required for the
triplet dominated type II seesaw formula to hold. We find that (i) SO(10) must
break to a nonminimal SU(5) before breaking to the standard model; (ii) $B-L$
symmetry must break at the time of SO(10) breaking and (iii) constraints of
unification seem to require that the minimal model must have a {\bf 54}
dimensional Higgs field together with a {\bf 210} and {\bf 126} to break the
GUT symmetry.


title: Slepton Flavor Violation

abstract:
  If the seesaw mechanism is implemented in supersymmetric theories the heavy
neutrinos generate corrections to the slepton mass matrices which enhance the
rates of charged lepton flavor violating processes. Here we study lepton flavor
violating slepton pair production and decay at a future e+e- linear collider in
mSUGRA post-LEP benchmark scenarios. We present the results of a background
simulation and investigate the correlations of the collider signals with the
corresponding radiative lepton decays.


title:
Search for excited charmonium states in $e^+e^-$ Annihilation at
  $\sqrt{s}=10.6$ GeV

abstract:
  We suggest searching for excited charmonium states in $e^+e^-$ annihilation
via double charmonium production at $\sqrt{s}=10.6$ GeV with $B$ factories,
based on a more complete leading order calculation including both QCD and QED
contributions for various processes. In particular, for the C=+ states, the
$\chi_{c0}(nP)$ (n=2,3) and $\eta_c(mS)$ (m=3,4) may have appreciable
potentials to be observed; while for the C=- states, the $\eta_ch_c$ production
and especially the $\chi_{c1}h_c$ production might provide opportunities for
observing the $h_c$ with higher statistics in the future. A brief discussion
for the X(3940) observed in the double charmonium production is included.


title:
K^+ -> pi^+ nu nu-bar and K_L -> pi^0 nu nu-bar Decays in the General
  MSSM

abstract:
  We reanalyze the rare decays K^+ -> pi^+ nu nu-bar and K_L -> pi^0 nu nu-bar
in a general MSSM with conserved R-parity. Working in the mass eigenstate basis
and performing adaptive scanning of a large space of supersymmetric parameters,
16 parameters in the constrained scan and 63 in the extended scan, we find that
large departures from the Standard Model expectations are possible while
satisfying all existing constraints. Both branching ratios can be as large as a
few times 10^{-10} with Br(K_L -> pi^0 nu nu-bar) often larger than Br(K^+ ->
pi^+ nu nu-bar) and close to its model independent upper bound. We give
examples of supersymmetric parameters for which large departures from the SM
expectations can be found and emphasize that the present 90% C.L. experimental
upper bound on Br(K^+ -> pi^+ nu nu-bar) gives a non trivial constraint on the
MSSM parameter space. Unlike previous analyses, we find that chargino box
diagrams can give, already for moderately light charged sleptons, a significant
contribution. As a byproduct we find that the ranges for the angles beta and
gamma in the unitarity triangle are relaxed due to the presence of new
CP-violating phases in K^0 - K^0-bar and B^0_d - B^0_d-bar mixing to 12 degrees
<= beta <= 27 degrees and 20 degrees <= gamma <= 110 degrees.


title:
Phase Conversion After a Chiral Transition: Effects from Inhomogeneities
  and Finite Size

abstract:
  We discuss the kinetics of phase conversion, through the nucleation of
bubbles and spinodal decomposition, after a chiral transition within an
effective field theory approach to low-energy QCD. We study possible effects
resulting from the finite size of the expanding system for both the initial and
the late-stage growth of domains, as well as those effects due to
inhomogeneities in the chiral field which act as a background for the fermionic
motion.


title: Quark Model Perspectives on Pentaquark Exotics

abstract:
  Expectations and predictions for pentaquark exotics based on the quark model
perspective are presented. Recent quark model scenarios, and calculations
performed in different realizations of the quark model approach, up to the end
of March 2004, are also reviewed and discussed.


title: Heavy Quark Analogues of the Theta and Their Excitations

abstract:
  Predictions for the low-lying excitation spectrum of positive parity
pentaquark systems containing one c or b antiquark and four light u,d quarks
are obtained in the quark model picture for models with spin-dependent
interactions given either by effective color magnetic (CM) exchange or
effective Goldstone boson (GB) exchange. For the GB model, 4 excited states are
predicted to lie within roughly the N-Delta splitting of the J=1/2 positive
parity ground state while, for the CM model, 10 states are expected in the same
range. Both the lowest excitation energy and the relative splittings are much
smaller in the CM case. These predictions are on the same footing as those for
the analogous splittings in the non-exotic baryon sector and, as such, provide
a means of not only testing the models, but potentially ruling out either one,
or both.


title: Constraints on the Quark Correlation Matrix from Equations of Motion

abstract:
  We show that the Politzer theorem on the equations of motion implies strong
constraints on the quark correlation matrix, restricting the number of
independent distribution functions that characterize the internal structure of
the nucleon. Then we draw some important consequences from this result. First
of all, we suggest an alternative method for determining transversity.
Secondly, we predict the Q^2-dependence of some azimuthal asymmetries. Lastly,
we illustrate the origin of the main contributions to some twist-3 distribution
functions.


title:
The phase between the three gluon and one photon amplitudes in
  quarkonium decays

abstract:
  The phase between three-gluon and one-photon amplitudes in psi(2S) and
psi(3770) decays is analyzed.


title: Pion Rescattering in Nuclei

abstract:
  Nuclear corrections are presented for neutrino and electron induced reactions
in a pedagogical manner. The formalism is demonstrated with numerical studies
and is shown to produce substantial corrections in channels where the pions
have the same charge with the exchanged current. Two comparisons with available
data show consistency of the model. Further studies along these lines will
improve the accuracy of the results and enhance the discovery potential of
experiments.


title:
SUSY Loop Contributions to the $W$-Pair Production in $e^+e^-$
  Collisions

abstract:
  We discuss one-loop contributions of supersymmetry (SUSY) particles to the
process $e^+e^- \to W^+W^-$ in the minimal supersymmetric standard model. The
calculation is tested by using the sum rule among the form factors, which is
based on the BRS invariance. The overall normalization factor of the amplitudes
is tested by using the decoupling property of the SUSY particles in the large
mass limit. The correction due to the one-loop effect of the sfermions can be
of a few times $\pm 0.1$ % level, whereas that of the charginos and neutralinos
can be order 1%. We also study the CP-violating effects in the chargino and
neutralino sector.


title: J/psi Absorption in Heavy Ion Collisions II

abstract:
  Using the methods introduced in a previous paper, we consider the
dissociation of J/psi by the lowest-lying pseudoscalar and vector mesons in the
hadronic fireball formed in heavy ion collisions, assumed to be a hadron gas at
temperature T. Absorption by nuclear matter is accounted for as well. We
compare with the S-U and Pb-Pb data presented by the NA50 Collaboration. From
data at low centrality we find T=160-180 MeV, close to the predicted
temperature of the transition to quark-gluon plasma and to the temperatures
measured by hadron abundances. We extrapolate to higher centralities with the
approximation of scaling the energy density of the fireball with the average
baryon density per unit transverse area. Using the energy-temperature relation
of the hadron gas made by the same pseudoscalar and vector mesons, the fall off
of J/psi production shown by the NA50 data, can be marginally reproduced only
for the highest temperature, T=180 MeV. If we use the energy-temperature
relation of a Hagedorn gas with limiting temperature T_H=173 MeV, predictions
fall short from reproducing the data. These results suggest that a different
mechanism is responsible for the J/psi suppression at large centralities, which
could very well be the formation of quark-gluon plasma.


title: Final-state radiation in electron-positron annihilation into pion pair

abstract:
  The process of $e^+ e^-$ annihilation into $\pi^+ \pi^-$ pair with radiation
of the photon is considered. The amplitude of the reaction $e^+ e^- \to \pi^+
\pi^- \gamma$ consists of the model independent initial-state radiation (ISR)
and model dependent final-state radiation (FSR). The general structure of the
FSR tensor is constructed from Lorentz covariance, gauge invariance and
discrete symmetries in terms of the three invariant functions. To calculate
these functions we apply Chiral Perturbation Theory (ChPT) with vector and
axial-vector mesons.
  The contribution of $e^+ e^- \to \pi^+ \pi^- \gamma$ process to the muon
anomalous magnetic moment is evaluated, and results are compared with the
dominant contribution in framework of a hybrid model, consisting of VMD and
point-like scalar electrodynamics.
  The developed approach allows us also to calculate the $\pi^+ \pi^-$ charge
asymmetry.


title: Pentaquark decay is suppressed by chirality conservation

abstract:
  It is shown, that if the pentaquark $\Theta^+ = uudd\bar{s}$ baryon can be
represented by the local quark current $\eta_{\Theta}$, its decay $\Theta^+ \to
n K^+ (p K^0)$ is forbidden in the limit of chirality conservation. The
$\Theta^+$decay width $\Gamma$ is proportional to $\alpha^2_s < 0 | \bar{q} q |
0 >^2$, where $<0 | \bar{q} q | 0 >$, $q = u,d,s$ is quark condensate, and,
therefore, is strongly suppressed. Also the polarization operator of the
pentaquark current with isospin 1 is calculated using the operator product
expansion and estimation for it mass is obtained .


title: Proton decay in Supersymmetric 331 Model

abstract:
  The aim of this paper is to discuss what sort of baryon-number violating
process arise on the supersymmetric versions of the model based on the gauge
group $SU(3)_C}\otimes SU(3)_{L}\otimes U(1)_{N}$. We discuss the mechanism of
baryon number violation which induces proton decay, and derive bounds on the
relevant couplings.


title: Mass of D*_sJ(2317) and Coupled Channel Effect

abstract:
  The resonance D*_sJ (2317) which is considered to be the 1^3P_0 state
composed of charm and strange quarks has been discovered recently. The measured
mass, which is about 160 MeV lower than the mass of the 1^3P_0 state obtained
from the potential model calculation by Godfrey and Isgur, was considered
surprisingly low and attracted a lot of theoretical investigations. We
calculate the mass shift of the 1^3P_0 state by using the coupled channel
e#ect. Our result shows that the coupled channel e#ect naturally explains the
low mass of D*_sJ (2317).


title: Heavy Particles from Inflation

abstract:
  We describe a simple and efficient mechanism by which very heavy particles
are copiously created from a primordial inflationary epoch. It works for scalar
fields which are massless or very light during inflation and acquire a large
mass right after the end of inflation. Such particles can exist in realistic
scenarios, as we illustrate with several examples in the context of both field
and string theory. Long-wavelength fluctuations of these fields are generated
during inflation with an almost scale-invariant spectrum and may give the
dominant contribution to the energy density of the heavy fields at late times.
Applications of our results to superheavy dark matter and leptogenesis are
discussed.


title:
Sparticle Masses, $\mu $ Problem and Anomaly Mediated Supersymmetry
  Breaking

abstract:
  Within the MSSM framework and with purely anomaly mediated supersymmetry
breaking the slepton masses turn out to be tachyonic. We resolve this problem
by introducing an anomaly free U(1) gauge symmetry which provides positive
$D$-term contributions to sparticle masses squared that are flavor conserving
at one loop. Two realistic examples based on SU(5) are presented. With U(1)
spontaneously broken at a scale $\sim 10^{16}$ GeV, the right handed neutrinos
acquire masses $\stackrel{<}{_\sim}10^{14}$ GeV. This breaking scale of U(1)
also plays an important role in the proposed resolution of the MSSM $\mu $
problem.


title:
Electron to Muon Conversion in Electron-Nucleus Scattering as a Probe of
  Supersymmetry

abstract:
  We suggest that $e\to \mu$ conversion in low-energy electron-nucleus
scattering is a new and potentially observable indirect signal of supersymmetry
and should be searched for in experiment.
  We estimate the rate for this process in a straightforward calculation taking
into account the existing constraint from non-observation of the $\mu\to
e\gamma$ decay and find the cross-section to be $\sigma < 10^{-8} $fb.


title: Single top production and decay at next-to-leading order

abstract:
  We present the results of a next-to-leading order analysis of single top
production including the decay of the top quark. Radiative effects are included
both in the production and decay stages, using a general subtraction method.
This calculation gives a good treatment of the jet activity associated with
single top production. We perform an analysis of the single top search at the
Tevatron, including a consideration of the main backgrounds, many of which are
also calculated at next-to-leading order.


title: D meson production in d+Au process using a perturbative approach

abstract:
  The D meson production at forward rapidities in d+Au processes is calculated
using a pQCD based model, assuming that this treatment could be used as a
baseline for distinct dynamical and medium effects. It is analysed how the
nuclear effects in the nuclear partonic distributions may affect this process
at RHIC and LHC energies. An enhancement in the moderate $q_T$ region for RHIC,
due to anti-shadowing in the nuclear medium, is found. Our prediction for LHC
suggests that shadowing will suppress the D meson spectra for $q_T<14$ GeV.


title: Hidden Gauge Symmetries: A New Possibility at the Colliders

abstract:
  We consider a new physics possibility at the colliders: the observation of
TeV scale massive vector bosons in the non-adjoint representations under the
Standard Model (SM) gauge symmetry. To have a unitary and renormalizable
theory, we propose a class of models with gauge symmetry $\prod_i G_i \times
SU(3)'_C \times SU(2)'_L \times U(1)'_Y$ where the SM fermions and Higgs fields
are singlets under the hidden gauge symmetry $\prod_i G_i$, and such massive
vector bosons appear after the gauge symmetry is spontaneously broken down to
the SM gauge symmetry. We discuss the model with SU(5) hidden gauge symmetry in
detail, and comment on the generic phenomenological implications.


title: Graphical amplitudes from SCET

abstract:
  We discuss the relationship between the graphical amplitudes T, C, P, ...
used to parameterize nonleptonic B decay amplitudes, and matrix elements of
operators in the soft-collinear effective theory (SCET) at leading order in
\Lambda/m_b. Using the SU(3) flavor symmetry of the weak Hamiltonian we derive
all-order constraints on the electroweak penguin contributions to the Wilson
coefficients of SCET operators.


title: Hadronic interaction of eta and eta-prime mesons with protons

abstract:
  We present results of investigations aiming to determine the hadronic
interaction of eta and eta-prime mesons with nucleons. Inferences are based on
comparisons of both the differential cross sections and the close-to-threshold
excitation functions for the p p --> p p eta and p p --> p p eta-prime
reactions with predictions based on the assumption that the kinematically
available phase space is homogeneously populated. We discuss the phenomenology
of the initial and final state interaction, relevance of the hadronic and
quark-gluon degrees of freedom for the reaction dynamics, and explain in detail
the experimental techniques used for the measurement of the meson production in
free and quasi-free collisions of nucleons.


title:
$ZZ\gamma$ and $Z\gamma\gamma$ couplings at linear $e^{+} e^{-}$
  collider energies with the effects of Z polarization and initial state
  radiation

abstract:
  The constraints on the neutral gauge boson couplings, $ZZ\gamma$ and
$Z\gamma\gamma$, are investigated at linear $e^{+}e^{-}$ collider energies
through the $Z\gamma$ production with longitudinal and transverse polarization
states of the final Z boson. Because of high energy of linear electron-
positron beams, initial state radiation (ISR) considerably changes the
production cross section. We obtain an increase in the cross section by a
factor of 2-3 due to ISR for transverse polarization and by a factor of 10-100
for longitudinal polarization states depending on the energy.
  We find the 95% C.L. limits on the CP conserving form factors $h_{3}^{Z}$,
$h_{4}^{Z}$, $h_{3}^{\gamma}$ and $h_{4}^{\gamma}$ with integrated luminosity
500$fb^{-1}$ and $\sqrt{s}=$0.5, 1, 1.5 TeV energies. It is shown that the
longitudinal polarization of the Z boson, together with ISR, can improve
sensitivities by factors 2-3.


title:
Lepton polarization asymmetries for $B \to K^* \ell^+ \ell^-$: A Model
  Independent approach

abstract:
  In this work we shall derive expressions for the single and double lepton
polarization asymmetries for the exclusive decay $B \to K^* \ell^+ \ell^-$,
using the most general model independent effective Hamiltonian. We have
conducted this study with this particular channel as it has the highest
branching ratio among the various purely leptonic and semi-leptonic decay
modes, making this mode particularly useful for studying physics beyond the SM.
We have also analyzed the effects on these polarization asymmetries, and hence
the physics underlying it, when complex phases are included in some of the
Wilson coefficients.


title: Lectures on Astroparticle Physics

abstract:
  These are extended notes of a series of lectures given at the XIth Brazilian
School of Cosmology and Gravitation. They provide a selection of topics at the
intersection of particle and astrophysics. The first part gives a short
introduction to the theory of electroweak interactions, with specific emphasize
on neutrinos. In the second part we apply this framework to selected topics in
astrophysics and cosmology, namely neutrino oscillations, neutrino hot dark
dark matter, and big bang nucleosynthesis. The last part is devoted to ultra
high energy cosmic rays and neutrinos where again particle physics aspects are
emphasized. The often complementary role of laboratory experiments is also
discussed in several examples.


title: Evidence for Dark Matter Annihilation from Galactic Gamma Rays?

abstract:
  The diffuse galactic EGRET gamma ray data show a clear excess for energies
above 1 GeV in comparison with the expectations from conventional galactic
models. The excess is seen with the same spectrum in all sky directions, as
expected for Dark Matter (DM) annihilation. This hypothesis is investigated in
detail. The energy spectrum of the excess is used to limit the WIMP mass to the
50-100 GeV range, while the skymaps are used to determine the halo structure,
which is consistent with a triaxial isothermal halo with additional enhancement
of Dark Matter in the disc. The latter is strongly correlated with the ring of
stars around our galaxy at a distance of 14 kpc, thought to originate from the
tidal disruption of a dwarf galaxy. It is shown that this ring of DM with a
mass of $\approx 2\cdot 10^{11} M_\odot$ causes the mysterious change of slope
in the rotation curve at $R=1.1R_0$ and the large local surface density of the
disc. The total mass of the halo is determined to be $3\cdot 10^{12} M_\odot$.
A cuspy profile is definitely excluded to describe the gamma ray data. These
signals of Dark Matter Annihilation are compatible with Supersymmetry for boost
factors of 20 upwards and have a statistical significance of more than
$10\sigma$ in comparison with the conventional galactic model. The latter
combined with all features mentioned above provides an intriguing hint that the
EGRET excess is indeed indirect evidence for Dark Matter Annihilation.


title:
A Model of Anthropic Reasoning, Addressing the Dark to Ordinary Matter
  Coincidence

abstract:
  If inflation occurs after the breaking of Peccei-Quinn symmetry then large
values of the breaking scale $F$, which are forbidden in conventional axion
cosmology, are permitted, provided that we inhabit a region of the Multiverse
where the initial misalignment is small. Regions having approximately this
initial misalignment may occupy a small volume of the Multiverse, but they
contain a large fraction of potential observers. This scenario has many
consequences, including a possible explanation of the approximate equality of
dark and baryon matter densities.


title: Semiclassical scattering amplitudes of dressed gravitons

abstract:
  We consider effective action for the Einstein gravity and show that dressed
mean fields are actual variables of the effective action. Kernels of this
effective action expressed in terms of dressed effective fields are constituent
parts of scattering amplitudes for gravitons. Possible applications to the
graviton scattering and black hole formation are discussed at the semiclassical
level. In particular, we consider graviton scattering in four dimensions based
on the Lipatov effective action for quantum gravity, shock waves of particles
moving on the brane in Randall-Sundrum scenario with fifth extra dimension, and
Giddings' estimation of Froissart bound.


title: An Approach to the Cosmological Constant Problem(s)

abstract:
  We propose an approach to explaining why naive large quantum fluctuations are
not the right estimate for the cosmological constant. We argue that the
universe is in a superposition of many vacua, in such a way that the resulting
fluctuations are suppressed by level repulsion to a very small value. The
approach combines several aspects of string theory and the early history of the
universe, and is only valid if several assumptions hold true. The approach may
also explain why the effective cosmological constant reamins small as the
universe evolves though several phase transitions. It provides a non-anthropic
mechansim leading to a small, non-zero cosmological constant.


title:
Measuring the deviation of the 2-3 lepton mixing from maximal with
  atmospheric neutrinos

abstract:
  The measurement of the deviation of the 2-3 leptonic mixing from maximal,
D_23 = 1/2 - sin^2(theta_23), is one of the key issues for understanding the
origin of the neutrino masses and mixing. In the three-neutrino context we
study the dependence of various observables in the atmospheric neutrinos on
D_23. We perform a global three-neutrino analysis of the atmospheric and
reactor neutrino data taking into account the effects of both the oscillations
driven by the "solar" parameters (Delta_m_21^2 and theta_12) and the 1-3
mixing. The departure from the one-dominant mass scale approximation results
into the shift of the 2-3 mixing from maximal by Delta_sin^2(theta_23) ~ 0.04,
so that D_23 ~ 0.04 +- 0.07 (1 sigma). Though value of the shift is not
statistically significant, the tendency is robust. The shift is induced by the
excess of the e-like events in the sub-GeV sample. We show that future large
scale water Cherenkov detectors can determine D_23 with accuracy of a few
percent, comparable with the sensitivity of future long baseline experiments.
Moreover, the atmospheric neutrinos will provide unique information on the sign
of the deviation (octant of theta_23).


title:
Single production of excited neutrinos at future e^{+}e^{-}, ep and pp
  colliders

abstract:
  We study the potential of the linear collider (LC) with sqrt{s}=0.5 TeV,
linac-ring type ep collider (LCxLHC) with sqrt{s}=3.74 TeV and the large hadron
collider (LHC) with sqrt{s}=14 TeV to search for excited neutrinos through
transition magnetic type couplings with gauge bosons. The excited neutrino
signal and corresponding backgrounds are studied in detail to obtain accessible
mass limits and couplings for these three types of colliders.


title: Quark energy loss and shadowing in nuclear Drell-Yan process

abstract:
  The energy loss effect in nuclear matter is another nuclear effect apart from
the nuclear effects on the parton distribution as in deep inelastic scattering
process. The quark energy loss can be measured best by the nuclear dependence
of the high energy nuclear Drell-Yan process. By means of three kinds of quark
energy loss parameterizations given in literature and the nuclear parton
distribution extracted only with lepton-nucleus deep inelastic scattering
experimental data, measured Drell-Yan production cross sections are analyzed
for 800GeV proton incident on a variety of nuclear targets from FNAL E866. It
is shown that our results with considering the energy loss effect are much
different from these of the FNAL E866 who analysis the experimental data with
the nuclear parton distribution functions obtained by using the deep inelastic
lA collisions and pA nuclear Drell-Yan data . Considering the existence of
energy loss effect in Drell-Yan lepton pairs production,we suggest that the
extraction of nuclear parton distribution functions should not include
Drell-Yan experimental data.


title: Generalized parton distributions from nucleon form factor data

abstract:
  We present a simple empirical parameterization of the x- and t-dependence of
generalized parton distributions at zero skewness, using forward parton
distributions as input. A fit to experimental data for the Dirac, Pauli and
axial form factors of the nucleon allows us to discuss quantitatively the
interplay between longitudinal and transverse partonic degrees of freedom in
the nucleon ("nucleon tomography"). In particular we obtain the transverse
distribution of valence quarks at given momentum fraction x. We calculate
various moments of the distributions, including the form factors that appear in
the handbag approximation to wide-angle Compton scattering. This allows us to
estimate the minimal momentum transfer required for reliable predictions in
that approach to be around |t|~3 GeV^2. We also evaluate the valence
contributions to the energy-momentum form factors entering Ji's sum rule.


title:
QED radiative corrections for elastic e(mu)p scattering in hadronic
  variables

abstract:
  A numerical analysis of QED radiative corrections for elastic e(mu)p
cattering in hadronic variables at energies of the current experiment at JLab
is performed. The explicit formulas from the review of Akhundov et al.
resulting from the integration over the phase space of leptonic variables plus
photon are used to obtain the values of the cross sections and the radiative
correction factor for unpolarized lepton-proton scattering. Our numerical
results agree with the corresponding results arising from the formulas of
Afanasev et al.


title: Rare Decays as Window to New Physics

abstract:
  Rare decays of K mesons are reviewed from the perspective of testing the
``ones'' and ``zeros'' of the standard model. Decays K^+ -> pi^+ nu anti-nu and
K_L -> pi^0 nu anti-nu probe the one-loop effective Hamiltonian for s -> d nu
anti-nu, and can constrain the rho, eta coordinates of the unitarity triangle.
Decays such as K_L -> pi^0 l^+ l^-, K_L -> mu^+ mu^-, K^+ -> pi^+ l^+ l^- and
K_L -> pi^+ pi^- e^+ e^- involve short-distance effects, as well as
long-distance photon-induced contributions. Some comments are added on curious
features of electroweak amplitudes in the ``gaugeless'' limit, and in the
chiral electron limit m_e -> 0.


title: Understanding penta quark with various quark models

abstract:
  The pentaquark state recently discovered has been studied with three quark
models which either fit the nucleon spin structure or the $NN$ scattering. A
minimum $\Theta^+$ mass of 1620 MeV is obtained both for the ${1/2}^\pm$ state.
The mixing of various color structure configurations, which would reduce the
mass of the penta-quark state, should be taking into account in the calculation
of penta-quark mass.


title:
Effective restoration of the U_A(1) symmetry with temperature and
  density

abstract:
  We investigate the full U(3)$\otimes$U(3) chiral symmetry restoration, at
finite temperature and density, on the basis of a quark model which
incorporates the most relevant properties of QCD in this context: explicit and
spontaneous breaking of chiral symmetry and axial U$_A$(1) symmetry breaking. A
specific lattice-inspired behavior of the topological susceptibility, combined
with the convergence of chiral partners, signals the onset of an effective
chiral symmetry restoration. The results suggest that the axial part of the
symmetry is restored before the possible restoration of the full
U(3)$\otimes$U(3) chiral symmetry can occur. This conclusion is valid in the
context of both finite temperature and density.


title:
Can Binary Bound States in a Strongly Coupled Quark-Gluon Plasma be
  observed via dileptons and photons?

abstract:
  Recently there was a significant change of views on physical properties and
underlying dynamics of Quark-Gluon Plasma at $T=170-350 MeV$, produced in heavy
ion collisions at RHIC. Instead of weakly coupled gas of quasiparticles, it is
rather a liquid-like matter with multiple bound states. In this paper we
discuss how one can test these ideas experimentally, using the ``penetrating
probes'' and looking for certain peaks at some invariant masses. In dileptons
the most promising are modified $\rho,\omega$, with $M(T\approx T_c)\sim .5
GeV$ and also near zero binding at $M(T\approx (1.5-2)T_c)=1.5-2 GeV$.
  We also discuss the observability of peaks corresponding to
scalar/pseudoscalar mesons in the two-photon channel.


title:
Renormalization-Group Improved Calculation of the B->Xs+gamma Branching
  Ratio

abstract:
  Using results on soft-collinear factorization for inclusive B-meson decay
distributions, a systematic study of the partial $B\to X_s\gamma$ decay rate
with a cut $E_\gamma > E_0$ on photon energy is performed. For values of $E_0$
below about 1.9 GeV, the rate can be calculated without reference to shape
functions using a multi-scale operator product expansion (MSOPE). The
transition from the shape-function region to the MSOPE region is studied
analytically. The resulting prediction for the $B\to X_s\gamma$ branching ratio
depends on three large scales: $m_b$, $\sqrt{m_b\Delta}$, and
$\Delta=m_b-2E_0$. Logarithms associated with these scales are resummed at
next-to-next-to-leading logarithmic order. While power corrections in
$\Lambda_{QCD}/\Delta$ turn out to be small, the sensitivity to the scale
$\Delta\approx 1.1$ GeV (for $E_0\approx 1.8$ GeV) introduces significant
perturbative uncertainties, which so far have been ignored. The new theoretical
prediction for the $B\to X_s\gamma$ branching ratio with $E_\gamma\ge 1.8$ GeV
is $Br(B\to X_s\gamma)=(3.38_{-0.42-0.30}^{+0.31+0.32})\times 10^{-4}$, where
the first error is an estimate of perturbative uncertainties and the second one
reflects uncertainties in input parameters. With this cut $(89_{-7}^{+6}\pm
1)%$ of all events are contained. The implications of larger theory
uncertainties for New Physics searches are briefly explored with the example of
the type-II two-Higgs-doublet model, for which the lower bound on the
charged-Higgs mass is reduced compared with previous estimates to approximately
200 GeV at 95% confidence level.


title:
Single Top Quark Production and Decay at Next-to-leading Order in Hadron
  Collision

abstract:
  We present a calculation of the next-to-leading order QCD corrections, with
one-scale phase space slicing method, to single top quark production and decay
process $p\bar{p},pp\to t\bar{b}+X\to b\ell\nu\bar{b}+X$ at hadron colliders.
Using the helicity amplitude method, the angular correlation of the final state
partons and the spin correlation of the top quark are preserved. The effect of
the top quark width is also examined.


title: Summary Report for the $e^- e^-$ session in LCWS 2004

abstract:
  In this talk, I summarize the activities in the $e^- e^-$ session. The
consensus is that if the next generation $e^+ e^-$ linear collider wants to
include an $e^- e^-$ option, the planning has to include it as early as
possible. By doing so the extra cost would be only a small fraction of the
total, and of course the physics potential would be very rewarding.


title: Proton spin structure and intrinsic motion of the constituents

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 are obtained. The resulting
structure functions $g_{1}$ and $g_{2}$ are well compatible with the
experimental data. Comparison with the basic formulas following from the
standard quark-parton model reveals the importance of the quark intrinsic
motion inside the target for the correct evaluation of the spin structure
functions.


title: Multi-Module Modeling of Heavy Ion Reactions and the 3rd Flow Component

abstract:
  Fluid dynamical calculations with QGP showed a softening of the directed flow
while with hadronic matter this effect is absent. On the other hand, we
indicated that a third flow component shows up in the reaction plane as an
enhanced emission, which is orthogonal to the directed flow. This is not
shadowed by the deflected projectile and target, and shows up at measurable
rapidities, $y_cm = 1-2$. To study the formation of this effect initial stages
of relativistic heavy ion collisions are studied. An effective string rope
model is presented for heavy ion collisions at RHIC energies. Our model takes
into account baryon recoil for both target and projectile, arising from the
acceleration of partons in an effective field. The typical field strength
(string tension) for RHIC energies is about 5-12 GeV/fm, what allows us to talk
about "string ropes". The results show that QGP forms a tilted disk, such that
the direction of the largest pressure gradient stays in the reaction plane, but
deviates from both the beam and the usual transverse flow directions. The
produced initial state can be used as an initial condition for further
hydrodynamical calculations. Such initial conditions lead to the creation of
third flow component. Recent $v_1$ measurements are promising that this effect
can be used as a diagnostic tool of the QGP. Collective flow is sensitive to
the early stages of system evolution. To study the sensitivity of the flow
signal, we have calculated flow harmonics from a Blast Wave model, a tilted,
ellipsoidally expanding source. We studied recent experimental techniques used
for calculation of the $v_n$ Fourier coefficients and pointed out a few
possible problems connected to these techniques, which may impair the
sensitivity of flow analysis.


title: Facets of the spinless Salpeter equation

abstract:
  The spinless Salpeter equation represents the simplest and most
straightforward generalization of the Schroedinger equation of standard
nonrelativistic quantum theory towards the inclusion of relativistic
kinematics. Moreover, it can be also regarded as a well-defined approximation
to the Bethe-Salpeter formalism for descriptions of bound states in
relativistic quantum field theories. The corresponding Hamiltonian is, in
contrast to all Schroedinger operators, a nonlocal operator. Because of the
nonlocality, constructing analytical solutions for such kind of equation of
motion proves difficult. In view of this, different sophisticated techniques
have been developed in order to extract rigorous analytical information about
these solutions. This review introduces some of these methods and compares
their significance by application to interactions relevant in physics.


title:
Comparison of a new Delta resonance production model with electron and
  neutrino data

abstract:
  We consider resonance production by neutrinos focusing on the dominant
resonance $P_{33}$ at low energies with a detailed discussion of its form
factors. The results are presented for free nucleon targets. The $\Delta$
resonance is described by two form factors $C_3^V$ and $C_5^A$ and its
differential cross sections are compared with experimental data. Further, we
apply this approach to the electroproduction case and calculate its
differential cross sections which are compared with electroproduction
experimental data. Our approach to the analysis of $\Delta$ resonance is
particularly simple and self-contained such that it could be helpful for the
physical interpretation.


title: CP violation in polarized B-> pi ell+ ell- and B-> rho ell+ ell- decays

abstract:
  We study the decay rate and the CP violating asymmetry of the exclusive B->
pi ell+ ell- and B-> rho ell+ ell- decays in the case where one of the final
leptons is polarized. We calculate the contributions coming from the individual
polarization states in order to identify a so-called wrong sign decay, which is
a decay with a given polarization, whose width and CP asymmetry are smaller as
compared to the unpolarized one. The results are presented for electron and tau
leptons. We observe that in particular decay channels, one can identify a wrong
sign decay which is more sensitive to new physics beyond the Standard Model.


title: Theta-13 as a Probe of Mu-Tau symmetry for Leptons

abstract:
  Many experiments are being planned to measure the neutrino mixing parameter
$\theta_{13}$ using reactor as well as accelerator neutrino beams. In this
note, the theoretical significance of a high precision measurement of this
parameter is discussed. It is emphasized that it will provide crucial
information about different ways to understand the origin of large atmospheric
neutrino mixing and move us closer towards determining the neutrino mass
matrix. For instance if exact $\mu\leftrightarrow \tau$ symmetry in the
neutrino mass matrix is assumed to be the reason for maximal $\nu_\mu-\nu_\tau$
mixing, one gets $\theta_{13}=0$. Whether $\theta_{13}\simeq \sqrt{\Delta
m^2_{\odot}/\Delta m^2_A}$ or $\theta_{13}\simeq \Delta m^2_{\odot}/\Delta
m^2_A$ can provide information about the way the $\mu\leftrightarrow \tau$
symmetry breaking manifests in the case of normal hierarchy. We also discuss
the same question for inverted hierarchy as well as possible gauge theories
with this symmetry.


title: Non-factorizable Contributions to $B \to \pi\pi$ Decays

abstract:
  We investigate to what extent the experimental information on $B \to \pi\pi$
branching fractions and CP asymmetries can be used to better understand the QCD
dynamics in these decays. For this purpose we decompose the independent isospin
amplitudes into factorizable and non-factorizable contributions. The former can
be estimated within the framework of QCD factorization for exclusive $B$
decays. The latter vanish in the heavy-quark limit, $m_b \to \infty$, and are
treated as unknown hadronic parameters. We discuss at some length in which way
the non-factorizable contributions are treated in different theoretical and
phenomenological frameworks. We point out the potential differences between the
phenomenological treatment of power-corrections in the ``BBNS approach'', and
the appearance of power -suppressed operators in soft-collinear effective
theory (SCET). On that basis we define a handful of different (but generic)
scenarios where the non-factorizable part of isospin amplitudes is parametrized
in terms of three or four unknowns, which can be constrained by data. We also
give some short discussion on the implications of our analysis for $B \to \pi
K$ decays. In particular, since non-factorizable QCD effects in $B \to \pi \pi$
may be large, we cannot exclude sizeable non-factorizable effects, which
violate $SU(3)_F$ flavour symmetry, or even isospin symmetry (via long-distance
QED effects). This may help to explain certain puzzles in connection with
isospin-violating observables in $B \to \pi K$ decays.


title: Scalar Mesons in Radiative Decays and pi-pi Scattering

abstract:
  In this write-up, I summarize the analyses on the low-lying scalar mesons I
have done recently with my collaborators. I first briefly review the previous
analyses on the hadronic processes related to the scalar mesons, which shows
that the scalar nonet takes dominantly the $qq\bar{q}\bar{q}$ structure. Next,
I summarize our analysis on the radiative decays involving the scalar mesons,
which indicates that it is difficult to distinguish $qq\bar{q}\bar{q}$ picture
and $q\bar{q}$ picture just from radiative decays. Finally, I summarize our
recent analysis on the $\pi$-$\pi$ scattering in the large $N_c$ QCD, which
indicates that the $\sigma$ meson is likely the $qq\bar{q}\bar{q}$ state.


title: Quarkonium Production and Decay

abstract:
  With new data sets, recently completed analyses and renewed interest, there
has been significant progress in addressing existing questions about quarkonia
production and decay ... but also new questions and new confrontation with
theory. Some highlights include the firm establishment of the eta_c^' and of
the ``missing'' psi^' decays to pseudoscalar-vector final states, improved
information on the nature of the psi(3770), and the observation of a new,
puzzling charmonium-like state at 3872 MeV.


title:
Seesaw induced electroweak scale, the hierarchy problem and sub-eV
  neutrino masses

abstract:
  We describe a model for the scalar sector where all interactions occur either
at an ultra-high scale L_U ~ 10^{16}-10^{19} GeV or at an intermediate scale
L_I ~ 10^{9}-10^{11} GeV. The interaction of physics on these two scales
results in an SU(2) Higgs condensate at the electroweak (EW) scale, L_{EW},
through a seesaw-like Higgs mechanism, L_{EW} ~ L_I^2/L_U, while the breaking
of the SM SU(2)XU(1) gauge symmetry occurs at the intermediate scale L_I. The
EW scale is, therefore, not fundamental but is naturally generated in terms of
ultra-high energy phenomena and so the hierarchy problem is alleviated. We show
that the class of such ``seesaw Higgs'' models predict the existence of sub-eV
neutrino masses which are generated through a ``two-step'' seesaw mechanism in
terms of the same two ultra-high scales: m_nu ~ L_I^4/L_U^3 ~ L_{EW}^2/L_U. The
neutrinos can be either Dirac or Majorana, depending on the structure of the
scalar potential. We also show that our seesaw Higgs model can be naturally
embedded in theories with tiny extra dimensions of size R ~ 1/L_U ~ 10^{-16}
fm, where the seesaw induced EW scale arises from a violation of a symmetry at
a distant brane; in particular, in the scenario presented there are 7 tiny
extra dimensions.


title:
The K-matrix approach to the Delta - resonance mass splitting and
  isospin violation in low-energy pi-N scattering

abstract:
  The experimental data on pi N scattering in the elastic energy region T_pi <
250 MeV are analyzed within the multichannel K-matrix approach with effective
Lagrangians. Isospin invariance is not assumed in this analysis and the
physical values for masses of the involved particles are used. The corrections
due to pi^+- pi^0 and p-n mass differences are calculated and found to be in a
reasonable agreement with the NORDITA results. Analysis shows the good
description of the all experimental observables. From the data, new values for
mass and width of the Delta^0 and Delta^{++} resonances were obtained. The
isospin symmetric version gives phase shifts values close to the new solution
for the pi-N elastic scattering amplitude FA02 by the GW group based on the
latest experimental data. Our analysis leads to a considerably smaller < 1%
isospin violation in the energy interval T_pi ~ 30-70 MeV as compared to 7% in
some older analyses, however, it does confirm recent calculations based on
chiral perturbation theory.


title: A dynamical mechanism to explain the top-bottom quark mass hierarchy

abstract:
  We discuss the mass splitting between the the top and bottom quarks in a
technicolor scenario. The model proposed here contains a left-right electroweak
gauge group. An extended technicolor group and mirror fermions are introduced.
The top-bottom quark mass splitting turns out to be intimately connected to the
breaking of the left-right gauge symmetry. Weak isospin violation occurs within
the experimental limits.


title: Supergravitational Production of "Flavor and Color"

abstract:
  A conventional graviton vertex operator is generated from the gauging of
global supersymmetry. If the outgoing gravitino is replaced by a fermion-boson
pair of like helicity, and if a new principle of equivalence associates
supergravity with the introduction of color, then every quark flavor can be
described as a gravitationally excited lepton. In this context, A SUSY SU(5)can
be constructed exclusively of leptons and their scaler superpartners (or of
quarks and their superpartners). This SUSY GUT flavor symmetry, which is
preserved by the proposed supergravity interactions, accounts for three
fermionic generations and predicts a new quark--aleft-handed (non-strange)
version of the strange quark.


title:
Flavor Democracy and Type-II Seesaw Realization of Bilarge Neutrino
  Mixing

abstract:
  We generalize the democratic neutrino mixing Ansatz by incorporating the
type-II seesaw mechanism with S(3) flavor symmetry. We find that bilarge
neutrino mixing can naturally appear if the flavor democracy contribution is
strongly suppressed due to significant cancellation between the conventional
seesaw and triplet mass terms. Explicit S(3) symmetry breaking yields
successful neutrino phenomenology and various testable correlations between the
neutrino mass and mixing parameters. Among the results are a normal neutrino
mass ordering, $0.005 \le |U_{e3}| \le 0.057$, $1 - \sin^2 2\theta_{23} \ge
0.005$, positive $J_{\rm CP}$ and moderate cancellation in the effective mass
of the neutrinoless double beta decay.


title:
The decays h+- -> W-+ h0(a0) within an extension of the MSSM with one
  complex Higgs triplet

abstract:
  The vertex H+-W-+h0, involving the gauge bosons W-+, the charged (H+-) and
the lightest neutral (h0) Higgs bosons, arises within the context of many
extensions of the SM, and it can be used to probe the Higgs sector of such
extensions via the decay H+- -> W+- h0. We discuss the strength of this vertex
for an extension of the MSSM with an additional complex Higgs triplet. By using
this model, we find regions of the parameter space where the decay H+- -> W+-
h0 is not only kinematically allowed, but it also becomes an important decay
mode and in some cases the dominant one.


title: Towards a Relativistic Description of Exotic Meson Decays

abstract:
  This work analyses hadronic decays of exotic mesons, with a focus on the
lightest one, the $J^{PC}=1^{-+}$ $\pi_{1}$, in a fully relativistic formalism,
and makes comparisons with non-relativistic results. We also discuss Coulomb
gauge decays of normal mesons that proceed through their hybrid components. The
relativistic spin wave functions of mesons and hybrids are constructed based on
unitary representations of the Lorentz group. The radial wave functions are
obtained from phenomenological considerations of the mass operator. Fully
relativistic results (with Wigner rotations) differ significantly from
non-relativistic ones. We also find that the decay channels $\pi_{1}\to\pi
b_{1}, \pi f_{1}, KK_{1}$ are favored, in agreement with results obtained using
other models.


title:
Probing Light Pseudoscalars with Light: Propagation, Resonance and
  Spontaneous Polarization

abstract:
  Radiation propagating over cosmological distances can probe light weakly
interacting pseudoscalar (or scalar) particles. The existence of a spin-0 field
changes the dynamical symmetries of electrodynamics. It predicts spontaneous
generation of polarization of electromagnetic waves due to mode mixing in the
presence of background magnetic field.We illustrate this by calculations of
propagation in a uniform medium, as well as in a slowly varying background
medium, and finally with resonant mixing. Highly complicated correlations
between different
  Stokes parameters are predicted depending on the parameter regimes.
  The polarization of propagating waves shows interesting and complex
dependence on frequency, the distance of propagation, coupling constants, and
parameters of the background medium such as the plasma density and the magnetic
field strength. For the first time we study the resonant mixing of
electromagnetic waves with the scalar field, which occurs when the background
plasma frequency becomes equal to the mass of the scalar field at some point
along the path. Dynamical effects are found to be considerably enhanced in this
case. We also formulate the condition under which the adiabatic approximation
can be used consistently, and find caveats about comparing different frequency
regimes.


title: The Renormalization group in non-relativistic theories

abstract:
  The resummation of logarithms in Quantum Field Theories is a long tale plenty
of successes, yet the resummation of logarithms in non-relativistic theories
has remained elusive. This was the most frustrating, since the first quantum
field theory log ever computed was the Lamb shift one. We briefly review recent
progress on the resummation of logarithms of $\alpha$, which appear in the
physics of non-relativistic states, using effective field theories. We put
special emphasis on the basic formalism.


title: Some Physics Beyond the Standard Model at Gamma Gamma Colliders

abstract:
  In this talk, I describe a few interesting physics beyond the standard model
that are quite unique for $\gamma\gamma$ collisions, including large extra
dimension model (ADD), warped extra dimension model (Randall-Sundrum) model,
universal extra dimension model, as well as techni-pions of technicolor models.


title: Spin and Parity of $\Xi_{3/2}$ Exotic Baryon from Kaon Scattering

abstract:
  We calculate total cross section for production of the $\Xi_{3/2}(1862)$
exotic baryon in $\bar{K}N \to K\Xi_{3/2}$ reaction assuming the following
spin-parity values of the $\Xi_{3/2}$ baryon 1/2+, 1/2-, 3/2+, 3/2-. We
demonstrate that the reaction total cross section strongly depends on the spin
of the $\Xi_{3/2}$ baryon.


title:
Phenomenological impact of the resummation of logs of alpha in heavy
  quarkonium

abstract:
  Here we would like to review recent progress on the resummation on logarithms
of $\alpha_s$ in heavy quarkonium. We will mainly focus on the phenomenological
relevance of these achievements. Determinations of the $\eta_b(1S)$ mass,
$B_c(1S)$ hyperfine splitting, inclusive electromagnetic decays and
implications for $t$-$\bar t$ production near threshold.


title: Factorization Breaking in Diffractive Dijet Photoproduction

abstract:
  We have calculated the diffractive dijet cross section in low-Q^2 ep
scattering in the HERA regime. The results of the calculation in LO and NLO are
compared to recent experimental data of the H1 collaboration. We find that in
LO the calculated cross sections are in reasonable agreement with the
experimental results. In NLO, however, some of the cross sections disagree,
showing that factorization breaking occurs in that order. By suppressing the
resolved contribution by a factor of approximately three, good agreement with
all the data is found. The size of the factorization breaking effects in
diffractive dijet photoproduction agrees well with absorptive model
predictions.


title: Comment on 'Photoproduction of $\eta$--Mesic ${^3}$He'

abstract:
  In a recent paper by the TAPS collaboration \cite{exp} a first measurement of
a bound system of an $\eta$ meson and a ${^3}$He nucleus was reported. In this
comment we critically reexamine the interpretation of the data and show that
the data prefers a solution where there is no bound state present. Given the
low statistics of the measurement, however, it does not exclude the existence
of a bound state.


title: The harmonic quarks and hadrons up to 1000 MeV

abstract:
  The calculations and analysis of a variance have shown, that masses of mesons
up to 1000 MeV strongly correlate with a model spectrum of potential wells at
mass of harmonic up-quark 105.6 MeV. It is shown, that probability of casual
correspondence of the meson and model spectrums is less than 1 ppm. The
harmonic quark model is applied to L=0 hadrons for the analysis of them
structures and detection of them filled quark shells. The possible quark
structures of all mesons up to 1000 MeV are given. The completely neutral
simple boson configurations are found for a threshold a proton-antiproton and
the total mass of neutral pion and kaon. Mass relations are fulfilled with
precision near 0.01%. It is supposed, that new relations is connected with
Higgs mechanism of mass formation. The final precision of calculated masses of
harmonic quarks is estimated as 0.005%.


title: Classical approximation of the Boltzmann equation in high energy QCD

abstract:
  Recently, Mueller and Son discussed the time evolution of a dense system
towards equilibrium in a scalar field theory. They show the equivalence of the
classical field approximation and the Boltzmann equation in all but linear
terms in the occupation number. Here we present the generalization to high
energy QCD.


title:
Two-loop Fermionic Electroweak Corrections to the Effective Leptonic
  Weak Mixing Angle in the Standard Model

abstract:
  We give some details of the recently completed calculation of the full
two-loop fermionic corrections to the effective leptonic weak mixing angle.
Among others, we describe the C++ library DiaGen/IdSolver, which was used to
reduce the two-loop light fermion vertex diagrams to linear combinations of
master integrals with rational function coefficients.


title: Soft-Collinear Factorization and the Calculation of the B->Xs+gamma Rate

abstract:
  Using results on soft-collinear factorization for inclusive B-meson decay
distributions, a systematic study of the partial B->Xs+gamma decay rate with a
cut E_gamma<E_0 on photon energy is performed. For values E_0<1.9 GeV the rate
can be calculated without reference to shape functions. The result depends on
three large scales: m_b, \sqrt{m_b Delta}, and Delta=m_b-2E_0. The sensitivity
to the scale Delta=1.1 GeV (for E_0=1.8 GeV) introduces significant
uncertainties, which have been ignored in the past. Our new prediction for the
B->Xs+gamma branching ratio with E_gamma<1.8 GeV is
Br(B->Xs+gamma)=(3.44+-0.53+-0.35)*10^{-4}, where the errors refer to
perturbative and parameter uncertainties, respectively. The implications of
larger theory uncertainties for New Physics searches are explored with the
example of the type-II two-Higgs-doublet model.


title:
The quantization of exotic states in SU(3) soliton models: A solvable
  quantum mechanical analog

abstract:
  The distinction between the rigid rotor and Callan-Klebanov approaches to the
quantization of SU(3) solitons is considered in the context of exotic baryons.
A numerically tractable quantum mechanical analog system is introduced to test
the reliability of the two quantization schemes. We find that in the equivalent
of the large N_c limit of QCD, the Callan-Klebanov approach agrees with a
numerical solution of the quantum mechanical analog. Rigid rotor quantization
generally does not. The implications for exotic baryons are briefly discussed.


title: Phenomenology of Goldstino Couplings

abstract:
  A general coupling of the Goldstino to the matter field and the weak
gravitational field is constructed based on the standard and the nonlinear
Volkov-Akulov realization of SUSY. The resulting Lagrangian, which is invariant
under SUSY transformations, can give rise to explicit interactions which couple
the helicity +-1/2 states of the gravitino with the gravitational field as well
as the matter field.


title:
An analysis on extrema and constrained bounds for the soft Pomeron
  intercept

abstract:
  We investigate some aspects and consequences of the extrema bounds for the
soft Pomeron intercept, recently determined by means of global fits to $pp$ and
$\bar{p}p$ total cross section data at both accelerator and cosmic-ray energy
regions (scattering data). We also examine the effects of the secondary
Reggeons by introducing fitted trajectories from Chew-Frautschi plots
(spectroscopy data) and determining new constrained bounds for the Pomeron
intercept. In both cases we extend the analysis to $baryon-p$, $meson-p$,
$baryon-n$, $meson-n$, $gamma-p$ and $gamma-gamma$ scattering, presenting tests
on factorization and quark counting rules. We show that in all the cases
investigated, the bounds lead to good descriptions of the bulk of experimental
data on the total cross sections, but with different extrapolations to higher
energies. Our main conclusion is that the experimental information presently
available on the above quantities is not sensitive to an uncertainty of 2% in
the value of the soft Pomeron intercept. At 14 TeV (CERN LHC) the extrema and
constrained bounds allow to infer $\sigma_{tot}$ = 114 $\pm$ 25 mb and 105
$\pm$ 10 mb, respectively.


title: Polarization effects in tau production by neutrino

abstract:
  We studied polarization effects in tau production by neutrino-nucleon
scattering. Quasi-elastic scattering, $Delta$ resonance production and deep
inelastic scattering processes are taken into account for the CERN-to-Gran
Sasso projects. We show that the tau produced by neutrino has high degree of
polarization, and its spin direction depends non-trivially on the energy and
the scattering angle of tau in the laboratory frame.


title: More evidence in favour of Light Dark Matter particles?

abstract:
  In a previous work, it was found that the Light Dark Matter (LDM) scenario
could be a possible explanation to the 511 keV emission line detected at the
centre of our galaxy. Here, we show that hints of this scenario may also have
been discovered in particle physics experiments. This could explain the
discrepancy between the measurement of the fine structure constant and the
value written in the CODATA. Finally, our results indicate that some of the LDM
features could be tested in accelerators. Their discovery might favour N=2
supersymmetry.


title: Meson spectrum in Regge phenomenology

abstract:
  Under the assumption that both light and heavy quarkonia populate
approximately linear Regge trajectories with the requirements of additivity of
intercepts and inverse slopes, the masses of different meson multiplets are
estimated. The predictions derived from the quasi-linear Regge trajectories are
in reasonable agreement with those given by many other references.


title: Nuclear structure corrections to gyromagnetic factor of the bound lepton

abstract:
  In the framework of the quasipotential method the covariant expression for
the two-particle vertex operator is obtained. The nuclear structure corrections
of orders (Z\alpha)^4, (Z\alpha)^5 including recoil effects to gyromagnetic
factors of the bound electron and muon are calculated. Numerical value of the
contribution of order (Z\alpha)^5 is obtained by means of the dipole
parameterization for the nuclear charge form factor in the range of the nuclear
charges Z=7-32.