title: Searching for a CP-odd Higgs via a pair of gauge bosons at the LHC

abstract:
  The CP-odd Higgs boson $A^0$ of the Minimal Supersymmetric Standard Model
(MSSM) and Two Higgs Doublet Model (2HDM) will usually decay into the heaviest
possible fermion -- antifermion pair available. The $A^0 \to VV$ decay where,
$V =\gamma, Z, W^\pm$, and gluons are of particular interest as they are not
allowed at tree level and hence they may offer information about the underlying
new physics that enters at one loop level. In this paper all branching ratios
of the CP-odd Higgs boson $A^0$ both in the MSSM and 2HDM are presented for
this channel including all relevant Standard Model (SM) and MSSM particles.
This discovery channel might provide an opportunity to search for a CP-odd
Higgs boson at the Large Hadron Collider (LHC) and new physics beyond the
Standard Model. Expressions for these decays are given in the Appendices.


title:
New approach in the extracting of parton densities, based on the
  parameterized solution of inverse Mellin technique

abstract:
  We analysis the sea quark densities, based on the constituent quark model. To
perform a direct fit with available experimental data, the parameterized
Inverse Mellin technique is used. The calculation is extended to the NLO
approximation for the singlet and non-singlet cases in DIS phenomena. We employ
the approach of complete RG improvement(CORGI) where one is forced to identify
and resum to all-orders RG-predictable ultraviolet logarithm terms which truly
build the Q-dependence of QCD observable. The results are compared with the
standard approach of perturbative QCD in the ${\bar{MS}}$ scheme with a
physical choice of scale. The results in the CORGI approach indicate a better
agreement to the data.


title: Radial Excitations of Heavy Mesons

abstract:
  Recent discovery of D_s states suggests existence of radial excitations. Our
semirelativistic quark potential model succeeds in reproducing these staes
within one to two percent of accuracy compared with the experiments, D_s0(2860)
and D_s^*(2715), which are identified as 0^+ and 1^- radial excitations (n=2).
We also present calculations of radial excitations for B/B_s heavy mesons.
Relation between our formulation and the modified Goldberger-Treiman relation
is also described.


title: Diffractive vector meson leptoproduction and spin effects

abstract:
  We analyse spin effects in diffractive vector meson leptoproduction at small
$x$ on the basis of the generalized parton distribution (GPD) approach. We take
into account quark transverse degrees of freedom in the hard subprocess. We
calculate amplitudes for the longitudinally and transversely polarized photons
and vector mesons. Our results on the cross section and spin density matrix
elements (SDME) are in fair agreement with the DESY experiments. Predictions
for HERMES and COMPASS energy range are made. The predicted double spin
longitudinal $A_{LL}$ asymmetry is not small at HERMES energies


title:
Multichannel calculation of the very narrow $D_{s0}^*(2317)$ and the
  very broad $D_0^*(2300-2400)$

abstract:
  The narrow $D_{s0}^{\ast}$(2317) and broad $D_0^{\ast}$(2300-2400) charmed
scalar mesons and their radial excitations are described in a coupled-channel
quark model that also reproduces the properties of the light scalar nonet. All
two-meson channels containing ground-state pseudoscalars and vectors are
included. The parameters are chosen fixed at published values, except for the
overall coupling constant $\lambda$, which is fine-tuned to reproduce the
$D_{s0}^{\ast}$(2317) mass, and a damping constant $\alpha$ for subthreshold
contributions. Variations of $\lambda$ and $D_0^{\ast}$(2300-2400) pole
postions are studied for different $\alpha$ values. Calculated cross sections
for $S$-wave $DK$ and $D\pi$ scattering, as well as resonance pole positions,
are given for the value of $\alpha$ that fits the light scalars. The thus
predicted radially excited state ${D_{s0}^*}'$(2850), with a width of about 50
MeV, seems to have been observed already.


title:
Testing CP and Time Reversal Symmetries with $\Lambda_b \to \Lambda
  V(1-)$ Decays

abstract:
  In this letter, an overview is given for interesting tests of both CP and
Time Reversal symmetries with the beauty baryon $\Lambda_b $. Extensive use of
the helicity formalism and HQET is done for all calculations. Then, emphasis is
put on sophisticated methods like analysis of resonance polarizations and
particular angle distributions which can exhibit a clear signal of TR
violation.


title: Twistors and Unitarity

abstract:
  We review on the recent developments for the computation of scattering
amplitudes, with attention to the on-shell formalisms and unitarity-based
methods.


title: Radiative and nonleptonic hyperon decays in broken SU(3)

abstract:
  We report on the recently proposed joint resolution of two long-standing
puzzles in weak radiative (WR) and nonleptonic (NL) hyperon decays (HD). First,
a good VMD-based description of WRHD is presented. In particular, the large
negative asymmetry observed in the \Sigma^+ \to p \gamma decay is explained
through a calculably large SU(3)-breaking effect in the relevant
parity-violating amplitude. Second, the achieved description of the
parity-violating WRHD amplitudes permits the extraction, via the SU(2)_W + VMD
route, of the non-soft-pion correction term in the parity-violating NLHD
amplitudes. The latter subtracts a substantial amount from the current-algebra
commutator term, thus leading to the resolution of the old S:P discrepancy in
NLHD.


title: Recent Developments in Soft-Collinear Effective Theory

abstract:
  Soft-collinear effective theory provides a systematic theoretical framework
to describe the factorization of short- and long-distance QCD dynamics in
hard-scattering processes that contain both, soft and energetic particles/jets.
I present a short guide to recent theoretical achievements and to
phenomenological applications in heavy B-meson decays.


title: Masses and decay constants of B_q mesons in the QCD string approach

abstract:
  The relativistic string Hamiltonian is used to calculate the masses and decay
constants of $B_q$ mesons: they appear to be expressed through onlythree
fundamental values: the string tension $\sigma $, $\alpha_s$, and the quark
pole masses. The values $f_B =186 $ MeV, $f_{B_s}= 222$ MeV are calculated
while $f_{B_c}$ depends on the $c$-quark pole mass used, namely $f_{B_c}=440
(424)$ MeV for $m_c =1.40 (1.35)$ GeV. For the $1P$ states we predict the
spin-averaged masses: $\bar M(B_J)=5730$ MeV and $\bar M(B_{sJ})=5830$ MeV
which are in good agreement with the recent data of the D0 and CDF
Collaborations, at the same time owning to the string correction being by $\sim
50$ MeV smaller than in other calculations.


title: Minimal Lepton Flavour Violation and leptogenesis

abstract:
  We study the role of leptogenesis in the framework of minimal lepton flavour
violation.


title: From RHIC to LHC: A relativistic diffusion approach

abstract:
  We investigate the energy dependence of stopping and hadron production in
high-energy heavy-ion collisions based on a three-sources Relativistic
Diffusion Model. The transport coefficients are extrapolated from Au + Au and
Cu + Cu at RHIC energies (sqrt{s_NN)=19.6 - 200 GeV) to Pb + Pb at LHC energies
sqrt{s_NN)= 5.52 TeV. Rapidity distributions for net protons, and
pseudorapidity spectra for produced charged particles in central collisions are
compared to data at RHIC energies, and discussed for several extrapolations to
LHC energies.


title: The mass hierarchy with atmospheric neutrinos at INO

abstract:
  We study the neutrino mass hierarchy at the magnetized Iron CALorimeter
(ICAL) detector at India-based Neutrino Observatory with atmospheric neutrino
events generated by the Monte Carlo event generator Nuance. We judicially
choose the observables so that the possible systematic uncertainties can be
reduced. The resolution as a function of both energy and zenith angle
simultaneously is obtained for neutrinos and anti-neutrinos separately from
thousand years un-oscillated atmospheric neutrino events at ICAL to migrate
number of events from neutrino energy and zenith angle bins to muon energy and
zenith angle bins. The resonance ranges in terms of directly measurable
quantities like muon energy and zenith angle are found using this resolution
function at different input values of $\theta_{13}$. Then, the marginalized
$\chi^2$s are studied for different input values of $\theta_{13}$ with its
resonance ranges taking input data in muon energy and zenith angle bins.
Finally, we find that the mass hierarchy can be explored up to a lower value of
$\theta_{13}\approx 5^\circ$ with confidence level $>$ 95% in this set up.


title: Transport coefficients in Chiral Perturbation Theory

abstract:
  We present recent results on the calculation of transport coefficients for a
pion gas at zero chemical potential in Chiral Perturbation Theory using Linear
Response Theory. More precisely, we show the behavior of DC conductivity and
shear viscosity at low temperatures. To compute transport coefficients, the
standard power counting of ChPT has to be modified. The effects derived from
imposing unitarity are also analyzed. As physical applications in Relativistic
Heavy Ion Collisions, we show the relation of the DC conductivity to
soft-photon production and phenomenological effects related to a nonzero shear
viscosity. In addition, our values for the shear viscosity to entropy ratio
satisfy the KSS bound.


title: Neutrino oscillations: what is magic about the "magic" baseline?

abstract:
  Physics interpretation of the ``magic'' baseline, $L_{magic}$, that can play
important role in future oscillation experiments is given. The ``magic''
baseline coincides with the refraction length, $l_0$. The latter, in turn,
approximately equals the oscillation length in matter at high energies.
Therefore at the baseline $L = l_0$ the oscillation phase is $2\pi$, and
consequently, the ``solar'' amplitude of oscillations driven by $\theta_{12}$
and $\Delta m^2_{21}$ vanishes. As a result, in the lowest order (i) the
interference of amplitudes in the $\nu_e - \nu_\mu$ $(\nu_\tau)$ transition
probability is absent; (ii) dependence of the probability on the CP-phase,
$\delta$, as well as on $\theta_{12}$ and $\Delta m^2_{21}$ disappears.
Corrections to the equality $L_{magic} = l_0$ are estimated. Effect of changing
density is considered and two new magic trajectories are identified for
neutrinos that cross the core of the Earth. Other magic baselines associated
with zeros of the atmospheric amplitude are discussed.


title: Scalar and axial-vector mesons

abstract:
  Nowadays, there exists an abundance of theoretical approaches towards the
mesonic spectrum, ranging from confinement models of all kinds, i.e.,
glueballs, and quark-antiquark, multiquark and hybrid configurations, to models
in which only mesonic degrees of freedom are taken into account. Nature seems
to come out somewhere in the middle, neither preferring pure bound states, nor
effective meson-meson physics with only coupling constants and possibly form
factors. As a matter of fact, apart from a few exceptions, like pions and
kaons, Nature does not allow us to study mesonic bound states of any kind,
which is equivalent to saying that such states do not really exist. Hence,
instead of extrapolating from pions and kaons to the remainder of the meson
family, it is more democratic to consider pions and kaons mesonic resonances
that happen to come out below the lowest threshold for strong decay.
Nevertheless, confinement is an important ingredient for understanding the many
regularities observed in mesonic spectra. Therefore, excluding quark degrees of
freedom is also not the most obvious way of describing mesons in general, and
scalars and axial-vectors in particular.


title: Some recent developments in chiral perturbation theory

abstract:
  In this talk, I address some recent developments in chiral perturbation
theory at unphysical and physical quark masses.


title:
Workshop on exotic hadronic atoms, deeply bound kaonic nuclear states
  and antihydrogen: present results, future challenges

abstract:
  These are the miniproceedings of the workshop "Exotic hadronic atoms, deeply
bound kaonic nuclear states and antihydrogen: present results, future
challenges," which was held at the European Centre for Theoretical Nuclear
Physics and Related Studies (ECT*), Trento (Italy), June 19-24, 2006. The
document includes a short presentation of the topics, the list of participants,
and a short contribution from each speaker.


title:
Implications of SU(2)_L x U(1) Symmetry for SIM(2) Invariant Neutrino
  Masses

abstract:
  We consider SU(2)_L x U(1) gauge invariant generalizations of a nonlocal,
Lorentz violating mass term for neutrinos that preserves a SIM(2) subgroup.
This induces Lorentz violating effects in QED as well as tree-level lepton
family number violating interactions. Measurements of g_e - 2 with trapped
electrons severely constrain possible SIM(2) mass terms for electrons which
violate C invariance. We study Lorentz violating effects in a C invariant and
SIM(2) invariant extension of QED. We examine the Lorentz violating
interactions of nonrelativistic electrons with electromagnetic fields to
determine their impact on the spectroscopy of hydrogen-like atoms and g_e - 2
measurements with trapped electrons. Generically, Lorentz violating corrections
are suppressed by m_\nu^2/m_e^2 and are within experimental limits. We study
one-loop corrections to electron and photon self-energies and point out the
need for a prescription to handle IR divergences induced by the nonlocality of
the theory. We also calculate the tree level contribution to \mu to e + \gamma
from SIM(2) invariant mass terms.


title: The Need for Purely Laboratory-Based Axion-Like Particle Searches

abstract:
  The PVLAS signal has led to the proposal of many experiments searching for
light bosons coupled to photons. The coupling strength probed by these near
future searches is, however, far from the allowed region, if astrophysical
bounds apply. But the environmental conditions for the production of axion-like
particles in stars are very different from those present in laboratories. We
consider the case in which the coupling and the mass of an axion-like particle
depend on environmental conditions such as the temperature and matter density.
This can relax astrophysical bounds by several orders of magnitude, just enough
to allow for the PVLAS signal. This creates exciting possibilities for a
detection in near future experiments.


title: Large $N$ Weinberg-Tomozawa interaction and spin-flavor symmetry

abstract:
  The construction of an extended version of the Weinberg-Tomozawa Lagrangian,
in which baryons and mesons form spin-flavor multiplets, is reviewed and some
of its properties discussed, for an arbitrary number of colors and flavors. The
coefficient tables of spin-flavor irreducible representations related by
crossing between the $s$-, $t$- and $u$-channels are explicitly constructed.


title:
Hadronic Production of the Doubly Charmed Baryon $\Xi_{cc}$ with
  Intrinsic Charm

abstract:
  The effects of the intrinsic charm on the hadronic production of $\Xi_{cc}$
are studied. By taking reasonable intrinsic charm component into account, the
change of the theoretical prediction on the production of $\Xi_{cc}$ for LHC
and Tevatron is small, but in contrast it may enhance significantly for SELEX.
The reason is that the collision energy at LHC and Tevatron is so large that
the gluon-gluon fusion sub-process, which is irrelevant to intrinsic charm,
becomes dominant. But the situation for SELEX is quite different. Our numerical
results for SELEX show that by considering all the contributions from various
sub-processes, the predicted cross-section may be enhanced by a factor so big
as $10^2$ due to a modulating intrinsic charm being taken into account.
Therefore, the hadronic production of $\Xi_{cc}$ at SELEX may be sensitive
enough in observing the intrinsic charm inside the incident hadrons.


title:
Four-loop beta function and mass anomalous dimension in Dimensional
  Reduction

abstract:
  Within the framework of QCD we compute renormalization constants for the
strong coupling and the quark masses to four-loop order. We apply the DR-bar
scheme and put special emphasis on the additional couplings which have to be
taken into account. This concerns the epsilon-scalar--quark Yukawa coupling as
well as the vertex containing four epsilon-scalars. For a supersymmetric Yang
Mills theory, we find, in contrast to a previous claim, that the evanescent
Yukawa coupling equals the strong coupling constant through three loops as
required by supersymmetry.


title:
A Double Parton Scattering Background to Associate $WH$ and $ZH$
  Production at the LHC

abstract:
  Higgs boson production in association with $W$ and $Z$ bosons at high
luminosity CERN Large Hadron Collider (LHC,$\sqrt{s}$=14 TeV), is one of the
most promising discovery channel for a SM Higgs particle with a mass below 135
GeV, where the Higgs decays into $b\bar{b}$ final states is dominant. The
experimental capability of recognizing the presence of $b$ quarks in a complex
hadronic final state has brought attention towards the final states with pairs
for observing the production of the Higgs at the LHC. We point out that double
parton scattering processes are going to represent a sizable background to the
process.


title: Rare B decays in a single Universal Extra Dimension scenario

abstract:
  Exclusive rare $B \to K^{(*)} \ell^+ \ell^-$, $B \to K^{(*)} \nu \bar \nu$
and $B \to K^* \gamma$ decays are studied within the Applequist-Cheng-Dobrescu
model, an extension of the Standard Model in presence of universal extra
dimensions. In the case of a single universal extra dimension compactified on a
circle of radius R, we study the dependence of several observables on 1/R, and
discuss whether the hadronic uncertainty due to the form factors obscures or
not such a dependence. We find that, using present data, it is possible in many
cases to put a sensible lower bound to 1/R, the most stringent one coming from
$B \to K^* \gamma$.


title:
Vector Higgs bosons and possible suppression of flavorchanging neutral
  current

abstract:
  We replace the scalar Higgs doublet with a vector Higgs boson doublet to the
unified electroweak W-S model and find most of important features of W-S model
are kept unchanged only the Higgs boson now become vector bosons. Lorentz
invariance has been carefully discussed. The most important challenge is there
will be three massless vector Higgs bosons. The remarkable effect is the
possible suppression of the flavorchanging neutral current compare to the
multi-Higgs model.


title: Can we probe right-handed charged quark currents?

abstract:
  Different scenarios of new physics beyond the standard model give rise to a
direct coupling of right-handed quarks to W bosons. We will discuss how the
prediction of the Callan-Treiman low energy theorem for the scalar K pi form
factor in combination with recent data on $K^L_{\mu 3}$ decays can serve as a
stringent test of the standard model (SM) and possible extensions, in
particular right-handed charged quark currents (RHCs). In addition, we will
comment on the impact of hadronic tau decay data on RHCs.


title: Low scale leptogenesis with an SU(2)_L singlet scalar

abstract:
  We consider thermal leptogenesis as the origin of the matter-antimatter
asymmetry of the Universe. Some phenomenologically unpleasant features of the
usual leptogenesis scenario are reviewed. We propose a minimal alternative,
which makes use of a charged scalar $\delta^+$, singlet under $SU(2)_L$. Such
particle is contained in natural extensions of the Standard Model. The lepton
asymmetry is generated by the decays of a right-handed neutrino into $\delta^+$
and a right-handed charged lepton and it turns out to be sufficiently large for
scales as low as $\sim$ TeV. The phenomenological signatures at colliders are
discussed.


title:
Distribution amplitudes of light mesons and photon in the instanton
  model

abstract:
  The leading- and higher-twist distribution amplitudes of pion, $\rho$-meson
and real and virtual photons are analyzed in the instanton liquid model.


title: A model solving the PVLAS-CAST puzzle

abstract:
  Axion physics has received a boost with the recent claim of the PVLAS
collaboration. Their results can be interpreted as due to a new axionlike
particle but the CAST collaboration has not found trace of it. While the
axionlike particle interpretation of the PVLAS signal is going to be probed by
dedicated laboratory experiments, it is mandatory to find either alternatives
to it or models in which the astrophysical bounds could be evaded. In this
communication one of such models is presented. The new physics involved appears
at a low energy scale $<$ eV.


title:
Mass dependence of nuclear shadowing at small Bjorken-x from diffractive
  scattering

abstract:
  We calculate the nuclear shadowing ratio for a wide range of nuclei at small
Bjorken-x in the framework of Gribov theory. The coherent contribution to the
(virtual) photon-nucleon cross section is obtained in terms of the diffractive
dissociation cross section. Information on diffraction from FNAL and HERA is
used. Our results are compared to available experimental data from the NMC and
E665 experiments at x ~ 10^{-4}.


title:
Behavior of the topological susceptibility at finite T and $\mu$ and
  signs of restoration of chiral symmetries

abstract:
  We investigate the possible restoration of chiral and axial symmetries across
the phase transition at finite temperature and chemical potential, by analyzing
the behavior of several physics quantities, such as the quark condensates and
the topological susceptibility, the respective derivatives in order to chemical
potential, and the masses of meson chiral partners. We discuss whether only
chiral symmetry or both chiral and axial symmetries are restored and what is
the role of the strange quark. The results are compared with recent lattice
results.


title: Bounds on length scales of classical spacetime foam models

abstract:
  Simple models of a classical spacetime foam are considered, which consist of
identical static defects embedded in Minkowski spacetime. Plane-wave solutions
of the vacuum Maxwell equations with appropriate boundary conditions at the
defect surfaces are obtained in the long-wavelength limit. The corresponding
dispersion relations \omega^2=\omega^2(\vec{k}) are calculated, in particular,
the coefficients of the quadratic and quartic terms in \vec{k}. Astronomical
observations of gamma-ray bursts and ultra-high-energy cosmic rays then place
bounds on the coefficients of the dispersion relations and, thereby, on
particular combinations of the fundamental length scales of the static
spacetime-foam models considered. Spacetime foam models with a single length
scale are excluded, even models with a length scale close to the Planck length
(as long as a classical spacetime remains relevant).


title: Clues for the existence of two $K_1(1270)$ resonances

abstract:
  The axial vector meson $K_1(1270)$ was studied within the chiral unitary
approach, where it was shown that it has a two-pole structure. We reanalyze the
high-statistics WA3 experiment $K^- p\to K^-\pi^+\pi^- p$ at 63 GeV, which
established the existence of both $K_1(1270)$ and $K_1(1400)$, and we show that
it clearly favors our two-pole interpretation. We also reanalyze the
traditional K-matrix interpretation of the WA3 data and find that the good fit
of the data obtained there comes from large cancellations of terms of unclear
physical interpretation.


title: Photon and dilepton production in heavy ion collisions at LHC

abstract:
  We review various production mechanisms of photons and small mass dileptons
at large transverse momentum in heavy ion collisions at the LHC. Their
relevance as a signal for quark-gluon plasma formation is discussed.


title: Comparison of Black Hole Generators for the LHC

abstract:
  We compare Monte Carlo event generators dedicated to simulating the
production and decay of extra-dimensional black holes at the Large Hadron
Collider.


title:
Effects of charged Higgs bosons in the deep inelastic process \nu_{\tau}
  {\cal N} \to \tau^- X and the possibility of detecting tau-neutrinos at
  cosmic neutrino detectors

abstract:
  We study the deep inelastic process $\nu_{\tau} + {\cal N} \to \tau^{-} + X$
(with ${\cal N} \equiv (n+p)/2$ an isoscalar nucleon), in the context of the
two Higgs doublet model type II (2HDM(II)). We discuss the contribution to the
total cross section of diagrams, in which a charged Higgs boson is exchanged.
We present results which show the strong dependence of such contribution on
$\tan\beta$ and $M_{H^{\pm}}$. We show that in the region $50 \leq \tan\beta
\leq 200$ and 90 GeV $\leq M_{H^{\pm}}\leq$ 600 GeV with the additional
experimental constraint on the involved model parameters $M_{H^{\pm}} \geq 1.5
\times \tan\beta$ GeV, the contribution of the charged Higgs boson exchange
diagrams to the cross section of the charged current inclusive $\nu_{\tau}
{\cal N}$ collision can become important. We obtain that this contribution for
an inclusive dispersion generated through the collision of an ultrahigh energy
tau-neutrino with $E_{\nu} \approx 10^{20}$ eV on a target nucleon can be
larger than the value of the contribution of the $W^{\pm}$ exchange diagrams,
provided that $M_{H^{\pm}} \approx 300$ GeV and $\tan\beta \approx 200$. Such
enhancement and the induced variation on the mean inelasticity $<y >^{CC}$
could lead to sizeable effects in the acceptance of cosmic tau-neutrino
detectors at experiments such as HiRes, PAO, and the CRTNT, which are anchored
to the ground, and at experiments such as EUSO and OWL, which are proposed to
orbit around the Earth.


title:
Coupling of pion condensate, chiral condensate and Polyakov loop in an
  extended NJL model

abstract:
  The Nambu Jona-Lasinio model with a Polyakov loop is extended to finite
isospin chemical potential case, which is characterized by simultaneous
coupling of pion condensate, chiral condensate and Polyakov loop. The pion
condensate, chiral condensate and the Polyakov loop as functions of temperature
and isospin chemical potential are investigated by minimizing the thermodynamic
potential of the system. The resulting $(T,\mu_I)$ phase diagram is studied
with emphasis on the critical point and Polyakov loop dynamics. The tricritical
point for the pion superfluidity phase transition is confirmed and the phase
transition for isospin symmetry restoration in high isospin chemical potential
region perfectly coincides with the crossover phase transition for Polyakov
loop. These results are in agreement with the Lattice QCD data.


title: Saturation effects in diffractive scattering at LHC energies

abstract:
  Unitarization schemes can be reduced to non-linear equations which saturate
at small $b$ the evolution of the elastic amplitude with $s$, and which mimic
parton saturation in the non-perturbative regime. These equations enable us to
study the effect of saturation on total and elastic cross sections for various
models, and to evaluate the uncertainties on $\sigma_{tot}$ and $\rho(s,t)$ at
the LHC in the presence of a hard pomeron.


title:
Study of electromagnetic decay of $J/\psi$ and $\psi^\prime$ to vector
  and pseudoscalar

abstract:
  The electromagnetic decay contributions to $J/\psi(\psi^\prime)\to VP$, where
$V$ and $P$ stand for vector and pseudoscalar meson, respectively, are
investigated in a vector meson dominance (VMD) model. We show that $J/\psi
(\psi^\prime)\to \gamma^*\to VP$ can be constrained well with the available
experimental information. We find that this process has significant
contributions in $\psi^\prime\to VP$ and may play a key role in understanding
the deviations from the so-called "12% rule" for the branching ratio fractions
between $\psi^\prime\to VP$ and $J/\psi\to VP$. We also address that the "12%
rule" becomes very empirical in exclusive hadronic decay channels.


title: Quark model study of the semileptonic B -> pi decay

abstract:
  The semileptonic decay B->pi is studied starting from a simple quark model
and taking into account the effect of the B* resonance. A novel, multiply
subtracted, Omn\`es dispersion relation has been implemented to extend the
predictions of the quark model to all physical q^2 values. We find
|V_{ub}|=0.0034 +/- 0.0003(exp.)+/- 0.0007(theory), in good agreement with
experiment.


title:
A Monte Carlo study on the production scale and internal structure of
  jets in high energy collisions

abstract:
  The production scale and internal structure of jets produced in high energy
collisions are studied using Jetset7.4 and Herwig5.9 Monte Carlo generators.
Two scales are found. One is the jet-development scale, which determines the
size of the jet developed from a mother-parton. The other one is the
jet-production scale, the jets produced with this scale are the most consistent
with QCD jet-production dynamics and will provide the most reliable dynamical
information about their mother-partons.


title: Fine and hyperfine structure of P-levels in muonic hydrogen

abstract:
  Corrections of orders $\alpha^5$ and $\alpha^6$ are calculated in the fine
structure interval $\Delta E^{fs}=E(2P_{3/2})-E(2P_{1/2})$ and in the hyperfine
structure of the energy levels $2P_{1/2}$ and $2P_{3/2}$ in muonic hydrogen.
The obtained numerical values $\Delta E^{fs}= 8352.08 \mu eV$, $\Delta \tilde
E^{hfs}(2P_{1/2})=7964.36 \mu eV$, $\Delta \tilde E^{hfs}(2P_{3/2})=3392.59 \mu
eV$ can be considered as a reliable estimate for the comparison with
corresponding experimental data and for the extraction of the experimental
value of the Lamb shift $(2P-2S)$ in muonic hydrogen.


title: Sum rule for rate and CP asymmetry in $B^+\to K^+\pi^0$

abstract:
  A sum rule relating the ratio $R_c = 2 \Gamma(B^+ \to K^+ \pi^0)/\Gamma(B^+
\to K^0 \pi^+)$ and the CP asymmetry $A_{CP}(B^+ \to K^+\pi^0)$ is proved to
first order in the ratio of tree to penguin amplitudes. The sum rule explains
why it is possible to have $R_c$ consistent with 1 together with a small CP
asymmetry in $B^+ \to K^+ \pi^0$. The measured ratio $A_{CP}(B^+\to
K^+\pi^0)/A_{CP}(B^0\to K^+\pi^-)$ rules out a small strong phase difference
between a color-suppressed and a color-favored tree amplitude contributing to
$B^+\to K^+\pi^0$ as favored by QCD factorization.


title: Chiral properties of the constituent quark model

abstract:
  We show that, in a model based exclusively on constituent-quark degrees of
freedom interacting via a potential, the full axial current is conserved if the
spectrum of \bar QQ states contains a massless pseudoscalar. The current
conservation emerges nonperturbatively if the model satisfies certain
constraints on (i) the axial coupling g_A of the constituent quark and (ii) the
\bar QQ potential at large distances. We define the chiral point of the
constituent quark model as that set of values of the parameters (such as the
masses of the constituent quarks and the couplings in the \bar QQ potential)
for which the mass of the lowest pseudoscalar \bar QQ bound state vanishes. At
the chiral point the main signatures of the spontaneously broken chiral
symmetry are shown to be present, namely: the axial current is conserved, the
decay constants of the excited pseudoscalar bound states vanish, and the pion
decay constant has a nonzero value.


title: Scalar meson properties from D-meson decays

abstract:
  Decay amplitudes of D(D_s)->f0(980)X, X=pi, K, are compared to experimental
branching ratios with the aim of singling out the poorly known D->f0(980)
transition form factor in these amplitudes. Since the other elements of the
amplitudes are either calculable in an effective QCD theory using operator
product expansion or are known from experiment (e.g. the pion and kaon decay
constants), we can take advantage of these reactions to constrain the
transition form factors obtained in relativistic quark models. In these models,
the f0(980) wavefunction requires an unknown size parameter for both its
non-strange ubar u(dbar d) and strange sbar s components, which we fit to the
D(D_s) decay data.


title:
QED X QCD Exponentiation: Shower/ME Matching and IR-Improved DGLAP
  Theory at the LHC

abstract:
  We discuss the elements of QED X QCD exponentiation and its interplay with
shower/ME matching and IR-improved DGLAP theory in precision LHC physics
scenarios. Applications to single heavy gauge boson production at hadron
colliders are illustrated.


title: The muon g-2 in a SU(7) left-right symmetric model with mirror fermions

abstract:
  We have studied a left-right symmetric model with mirror fermions based in a
grand unified SU(7) model in order to account for the muon anomaly. The Higgs
sector of the model contains two Higgs doublets and the hierarchy condition
$\upsilon_{L}\ll\upsilon_{R}$ can be achieved by using two additional Higgs
singlets, one even and other odd under
  $\mathcal{D}$-parity. We show that there is a wide range of values for the
mass parameters of the model that is consistent with the $g-2$ lepton
anomalies.
  Radiative correction to the mass of the ordinary fermions are shown to be
small.


title: Resummed Quantum Gravity

abstract:
  We present the current status of the a new approach to quantum general
relativity based on the exact resummation of its perturbative series as that
series was formulated by Feynman. We show that the resummed theory is UV finite
and we present some phenomenological applications as well.


title: Excited baryons and heavy pentaquarks in large Nc QCD

abstract:
  We briefly discuss the large Nc picture for excited baryons, present a new
method for the calculation of matrix elements and illustrate it by computing
the strong decays of heavy exotic states.


title: CP asymmetries in scalar bottom quark decays

abstract:
  We propose CP asymmetries based on triple product correlations in the decays
sbottom_m -> top chargino_j with subsequent decays of top and chargino_j. For
the subsequent chargino_j decay into a leptonic final state l^- \nu
neutralino_1 we consider the three possible decay chains chargino_j -> l^-
sneutrino -> l^- \nu neutralino_1, chargino_j -> slepton_n \nu -> l^- \nu
neutralino_1 and chargino_j -> W^- neutralino_1 -> l^- \nu neutralino_1. We
consider two classes of CP asymmetries. In the first class it must be possible
to distinguish between different leptonic chargino_j decay chains, whereas in
the second class this is not necessary. We consider also the 2-body decay
chargino_j -> W^- neutralino_1, and we assume that the momentum of the W boson
can be measured. Our framework is the minimal supersymmetric standard model
with complex parameters. The proposed CP asymmetries are non-vanishing due to
non-zero phases for the parameters \mu and/or A_b. We present numerical results
and estimate the observability of these CP asymmetries.


title:
Leading Order Calculation of Electric Conductivity in Hot Quantum
  Electrodynamics from Diagrammatic Methods

abstract:
  Using diagrammatic methods, we show how the Ward identity can be used to
constrain the ladder kernel in transport coefficient calculations. More
specifically, we use the Ward identity to determine the necessary diagrams that
must be resummed using an integral equation. One of our main results is an
equation relating the kernel of the integral equation with functional
derivatives of the full self-energy; it is similar to what is obtained with 2PI
effective action methods. However, since we use the Ward identity as our
starting point, gauge invariance is preserved. Using power counting arguments,
we also show which self-energies must be included in the resummation at leading
order, including 2 to 2 scatterings and 1 to 2 collinear scatterings with the
LPM effect. We show that our quantum field theory result is equivalent to the
one of Arnold, Moore and Yaffe obtained using effective kinetic theory. In this
paper we restrict our discussion to electrical conductivity in hot QED, but our
method can in principle be generalized to other transport coefficients and
other theories.


title: Single Transverse-Spin Asymmetries at Large-x

abstract:
  The large-$x$ behavior of the transverse-momentum dependent quark
distributions is analyzed in the factorization-inspired perturbative QCD
framework, particularly for the naive time-reversal-odd quark Sivers function
which is responsible for the single transverse-spin asymmetries in various
semi-inclusive hard processes. By examining the dominant hard gluon exchange
Feynman diagrams, and using the resulting power counting rule, we find that the
Sivers function has power behavior $(1-x)^4$ at $x \to 1$, which is one power
of $(1-x)$ suppressed relative to the unpolarized quark distribution. These
power-counting results provide important guidelines for the parameterization of
quark distributions and quark-gluon correlations.


title:
Superfluidity in many fermion systems: Exact renormalisation group
  treatment

abstract:
  The application of the exact renormalisation group to symmetric as well as
asymmetric many-fermion systems with a short-range attractive force is studied.
  Assuming an ansatz for the effective action with effective bosons, describing
pairing effects a set of approximate flow equations for the effective coupling
including boson and fermionic fluctuations has been derived. The phase
transition to a phase with broken symmetry is found at a critical value of the
running scale. The mean-field results are recovered if boson-loop effects are
omitted. The calculations with two different forms of the regulator are shown
to lead to a similar results. We find that, being quite small in the case of
the symmetric many-fermion system the corrections to mean field approximation
becomes more important with increasing mass asymmetry.


title: Relativistic description of semileptonic decays of heavy baryons

abstract:
  Semileptonic decays of heavy baryons consisting of one heavy (Q=b,c) and two
light (q=u,d,s) quarks are considered in the heavy-quark--light-diquark
approximation. The relativistic quasipotential equation is used for obtaining
masses and wave functions of both diquarks and baryons within the constituent
quark model. The weak transition matrix elements are expressed through the
overlap integrals of the baryon wave functions. The Isgur-Wise functions are
determined in the whole accessible kinematic range. The exclusive semileptonic
decay rates are calculated with applying the heavy quark 1/m_Q expansion. The
evaluated Lambda_b -> Lambda_c l nu decay rate agrees with its experimental
value.


title: Invariant see-saw models and sequential dominance

abstract:
  We propose an invariant see-saw (ISS) approach to model building, based on
the observation that see-saw models of neutrino mass and mixing fall into basis
invariant classes labelled by the Casas-Ibarra $R$-matrix, which we prove to be
invariant not only under basis transformations but also non-unitary
right-handed neutrino transformations $S$. According to the ISS approach, given
any see-saw model in some particular basis one may determine the invariant $R$
matrix and hence the invariant class to which that model belongs. The
formulation of see-saw models in terms of invariant classes puts them on a
firmer theoretical footing, and allows different see-saw models in the same
class to be related more easily, while their relation to the $R$-matrix makes
them more easily identifiable in phenomenological studies. We also present an
ISS mass formula which may be useful in model building. To illustrate the ISS
approach we show that sequential dominance (SD) models form basis invariant
classes in which the $R$-matrix is approximately related to a permutation of
the unit matrix, and quite accurately so in the case of constrained sequential
dominance (CSD) and tri-bimaximal mixing. Using the ISS approach we discuss
examples of models in which the mixing naturally arises (at least in part) from
the charged lepton or right-handed neutrino sectors and show that they are in
the same invariant class as SD models. We also discuss the application of our
results to flavour-dependent leptogenesis where we show that the case of a real
$R$ matrix is approximately realized in SD, and accurately realized in CSD.


title: MeV Right-handed Neutrinos and Dark Matter

abstract:
  We consider the possibility of having a MeV right-handed neutrino as a dark
matter constituent. The initial reason for this study was the 511 keV spectral
line observed by the satellite experiment INTEGRAL: could it be due to an
interaction between dark matter and baryons? Independently of this, we find a
number of constraints on the assumed right-handed interactions. They arise in
particular from the measurements by solar neutrino experiments. We come to the
conclusion that such particles interactions are possible, and could reproduce
the peculiar angular distribution, but not the rate of the INTEGRAL signal.
However, we stress that solar neutrino experiments are susceptible to provide
further constraints in the future.


title: Running $U_{e3}$ and BR($\mu\to e +\gamma$) in SUSY-GUTs

abstract:
  In supersymmetric seesaw models based on SUSY-GUTs, it could happen that the
neutrino PMNS mixing angles are related to the lepton flavour violating decay
rates. In particular SO(10) frameworks, the smallest mixing angle would get
directly correlated with the $\mu \to e + \gamma $ decay amplitude. Here we
study this correlation in detail considering $U_{e3}$ as a free parameter
between 0 and $U_{e3}$(CHOOZ). Large radiative corrections to $U_{e3}$ present
in these models, typically of the order ~$\Delta U_{e3} ~\sim ~10^{-3}$
(peculiar to hierarchial neutrinos), can play a major role in enhancing the
Br($\mu \to e +\gamma$), especially when $U_{e3} \ler 10^{-3}$. For large
tan$\beta$, even such small enhancements are sufficient to bring the associated
Br($\mu \to e + \gamma$) into realm of MEG experiment as long as SUSY spectrum
lies within the range probed by LHC. On the other hand, for some (negative)
values of $U_{e3}$, suppressions can occur in the branching ratio, due to
cancellations among different contributions. From a top-down perspective such
low values of $U_{e3}$ at the weak scale might require some partial/full
cancellations between the high scale parameters of the model and the radiative
corrections unless $U_{e3}$ is purely of radiative origin at the high scale. We
further emphasize that in Grand Unified theories there exist additional LFV
effects related to the running above the GUT scale, that are also independent
on the low energy value of $U_{e3}$. These new contributions can become
competitive and even dominant in some regions of the parameter space.


title: On QCD resummation with kt clustering

abstract:
  We revisit the impact of the jet algorithm on predictions of energy flow into
gaps between hard jets, defined using the kt clustering procedure. The
resulting prediction has two distinct components: a primary emission piece that
is related to independent emission of soft gluons by the hard jets and a
correlated emission (non-global) piece known only in the large N_c limit. We
analytically compute the dependence of the primary emission term on the jet
algorithm, which gives significantly more insight than our previous numerical
study of the same. We also point out that the non-global component of the
answer is reduced even more significantly by the clustering than suggested
previously in the literature. Lastly we provide improved predictions for the
latest ZEUS photoproduction data, assessing the impact of our latest findings.


title:
Sub-eV Hubble scale inflation within gauge mediated supersymmetry
  breaking

abstract:
  Minimal Supersymmetric Standard Model with gauge mediated supersymmetry
breaking has all the necessary ingredients for a successful sub-eV Hubble scale
inflation $H_{\rm inf} \sim 10^{-3}-10^{-1}$ eV. The model generates the right
amplitude for scalar density perturbations and a spectral tilt within the
range, $0.90 \leq n_s \leq 1$. The reheat temperature is $T_{\rm R} \ls 10$
TeV, which strongly prefers electroweak baryogenesis and creates the right
abundance of gravitinos with a mass $m_{3/2} \gs 100$ keV to be the dark
matter.


title:
A Monte Carlo Study on the Identification of Quark-gluon Fusion Product
  in QCD-instanton Induced Processes in Deep-inelastic Scattering

abstract:
  Different methods to reconstruct the quark-gluon fusion product and current
jet are tried in deep-inelastic e-p scattering events with instanton as
background generated by QCDINS Monte Carlo code. A comparison of these methods
are performed and a good method is found which can reconstruct well the
energies of current jet and instanton product as well as the mass of the
latter. The isotropy property of the instanton product and jet are calculated
and compared. A parameter characterizing the degree of ``hardness'' of the
instanton product is presented.


title: Charmonium possibility of X(3872)

abstract:
  Properties of Regge trajectories for charmonium are studied. Possible
interpretations and their implications to newly observed X(3872) are examined.
It is found that the mass of X(3872) is consistent with the 1^{++} 2^3P_1 and
the 2^{-+} 1^1D_2 charmonium states.


title: |V_us| from Strange Hadronic Tau Data

abstract:
  We report on recent work to determine the CKM matrix element |V_{us}| using
strange hadronic \tau decay data. We use the recent OPAL update of the strange
spectral function, while on the theory side we update the dimension-two
perturbative contribution including the recently calculated \alpha_s^3 terms.
Our result |V_{us}|=0.2220 \pm 0.0033 is already competitive with the standard
extraction from K_{e3} decays and other new proposals to determine |V_{us}|.
The actual uncertainty on |V_{us}| from \tau data is dominated largely by
experiment and will eventually be much reduced by B-factories and future
\tau-charm factory data, providing one of the most accurate determinations of
this Standard Model parameter.


title: Neutrinos in astroparticle physics

abstract:
  I briefly discuss the role of neutrinos as probes in astroparticle physics
and review the status of neutrino oscillation parameters as of June 2006,
including recent fluxes, and latest SNO, K2K and MINOS results. I comment on
the origin of neutrino masses in seesaw-type and low-scale models and mention
some of their experimental signals.


title: Constraint of parameters in a neutrino mass formula

abstract:
  A search for the parameter constraint in the three-parameter empirical mass
formula proposed recently for active neutrinos is described. Without any
parameter constraint the formula is a formal transformation of three free
parameters into three neutrino masses or vice versa, giving no numerical
predictions for the masses. But, this is a very special transformation,
providing some specific suggestions as to its parameters, when it is confronted
with the present, unfortunately incomplete, experimental data. If the
parameters become constrainted, then there appear some numerical predictions
for the neutrino masses, subject to experimental verification (as far as it is
or will be possible).


title: Non-perturbative Effect on Thermal Relic Abundance of Dark Matter

abstract:
  We point out that thermal relic abundance of the dark matter is strongly
altered by a non-perturbative effect called the Sommerfeld enhancement, when
constituent particles of the dark matter are non-singlet under the SU(2)_L
gauge interaction and much heavier than the weak gauge bosons. Typical
candidates for such dark matter particles are the heavy wino- and higgsino-like
neutralinos. We investigate the non-perturbative effect on the relic abundance
of dark matter for the wino-like neutralino as an example. We show that its
thermal abundance is reduced by 50% compared to the perturbative result. The
wino-like neutralino mass consistent with the observed dark matter abundance
turns out to be 2.7 TeV < m < 3.0 TeV.


title: A4 family symmetry and quark-lepton unification

abstract:
  We present a model of quark and lepton masses and mixings based on A4 family
symmetry, a discrete subgroup of an SO(3) flavour symmetry, together with
Pati-Salam unification. It accommodates tri-bimaximal neutrino mixing via
constrained sequential dominance with a particularly simple vacuum alignment
mechanism emerging through the effective D-term contributions to the scalar
potential.


title: Heavy Quarkonium Physics from Effective Field Theories

abstract:
  I review recent progress in heavy quarkonium physics from an effective field
theory perspective. In this unifying framework, I discuss advances in
perturbative calculations for low-lying quarkonium observables and in lattice
calculations for high-lying ones, and progress and lasting puzzles in
quarkonium production.


title: Soft-gluon and hadron-mass effects on fragmentation functions

abstract:
  We review recent progress in the development of an approach valid to any
order which unifies the fixed-order DGLAP evolution of fragmentation functions
at large x with soft-gluon logarithmic resummation at small x. At leading
order, this approach, implemented with the Double Logarithmic Approximation,
reproduces exactly the Modified Leading Logarithm Approximation, but it is more
complete due to the degrees of freedom given to the quark sector and the
inclusion of the fixed-order terms. We find that data from the largest x values
to the peak region can be better fitted than with other approaches. In
addition, we develop a treatment of hadron mass effects that leads to
additional improvements at small x.


title: A New Two Higgs Doublet Model

abstract:
  We propose an extension of the Standard Model by extending the EW symmetry to
SU(2)_L x U(1) x Z_2 and introducing three SU(2)_L x U(1) singlet right handed
neutrinos, N_R, and an additional Higgs doublet, phi. While the SM gauge bosons
and the quarks and charged leptons acquire masses from the spontaneous breaking
of SU(2)_L x U(1) symmetry at the electroweak scale, the neutrinos acquire
masses from the spontaneous breaking of the discrete Z_2 symmetry at a scale of
10^{-2} eV. In addition to providing a new mechanism for generating tiny masses
for the neutrinos, the model has interesting implications for neutrinoless
double beta decay and the Higgs signals at high energy colliders, as well as in
astrophysics and cosmology.


title: Q\bar{Q} modes in the Quark-Gluon Plasma

abstract:
  We study the evolution of heavy quarkonium states with temperature in a
Quark-Gluon Plasma by evaluating an in-medium Q\bar{Q} T-matrix within a
reduced Bethe-Salpeter equation in S- and P-wave channels. The interaction
kernel is extracted from finite-temperature QCD lattice calculations of the
singlet free energy of a Q\bar{Q} pair. Quarkonium bound states are found to
gradually move across the Q\bar{Q} threshold after which they rapidly dissolve
in the hot system. We calculate Euclidean-time correlation functions and
compare to results from lattice QCD. We also study finite-width effects in the
heavy-quark propagators.


title: Scalar Loops in Little Higgs Models

abstract:
  Loops of the scalar particles present in Little Higgs models generate
radiatively scalar operators that have been overlooked before in Little Higgs
analyses. We compute them using a technique, recently proposed to deal with
scalar fluctuations in non-linear sigma models, that greatly simplifies the
calculation. In particular models some of these operators are not induced by
loops of gauge bosons or fermions, are consistent with the Little Higgs
symmetries that protect the Higgs boson mass, and must also be included in the
Lagrangian. In general, scalar loops multiplicatively renormalize the
tree-level scalar operators, O_S -> O_S [1- N \Lambda^2/(4\pi f)^2] with large
N (e.g. N ~ 20 for the Littlest Higgs), suggesting a true UV cutoff \Lambda < 4
\pi f/\sqrt{N} significantly below the estimate 4\pi f of naive dimensional
analysis. This can have important implications for the phenomenology and
viability of Little Higgs models.


title: Phenomenology of infrared finite gluon propagator and coupling constant

abstract:
  We report on some recent solutions of the Dyson-Schwinger equations for the
infrared behavior of the gluon propagator and coupling constant, discussing
their differences and proposing that these different behaviors can be tested
through hadronic phenomenology. We discuss which kind of phenomenological tests
can be applied to the gluon propagator and coupling constant, how sensitive
they are to the infrared region of momenta and what specific solution is
preferred by the experimental data.


title: A $SU(4)\otimes O(3)$ scheme for nonstrange baryons

abstract:
  We show that nonstrange baryon resonances can be classified according to
multiplets of $SU(4)\otimes O(3)$. We identify spectral regularities and
degeneracies that allow us to predict the high spin spectrum from 2 to 3 GeV.


title: Intense Neutrino Beams and Leptonic CP Violation

abstract:
  Effects of the Leptonic CP violating phase,\delta, on 3 generation neutrino
oscillation rates and asymmetries are discussed. A figure of merit argument is
used to show that our ability to measure the phase \delta is rather insensitive
to the value of \theta_{13} (for \sin^22\theta_{13}\gsim0.01) as well as the
detector distance (for very long oscillation baselines). Using a study of
\nu_\mu\to\nu_e oscillations for BNL-Homestake (2540 km) we show that a
conventional horn focused wide band neutrino beam generated by an intense 1-2
MW proton source combined with a very large water Cherenkov detector (250-500
kton) should be able to determine \delta to about \pm 15^\circ$ in 5\times
10^7sec of running. In addition, such an effort would also measure the other
oscillation parameters (\theta_{ij},\Delta m^2_{ij}) with high precision.
Similar findings apply to a Fermilab-Homestake (1280 km)baseline. We also
briefly discuss features of Superbeams, Neutrino Factories and Beta-Beams.


title:
Symmetry limit properties of decay amplitudes with mirror matter
  admixtures

abstract:
  We extend our previous analysis on the symmetry limit properties of
non-leptonic and weak radiative decay amplitudes of hyperons in a scheme of
mirror matter admixtures in physical hadrons to include the two-body
non-leptonic decays of $\Omega^-$ and the two photon and two pion decays of
kaons. We show that the so-called parity-conserving amplitudes predicted for
all the decays vanish in the strong flavor SU(3) symmetry limit. We also
establish the specific conditions under which the corresponding so-called
parity-violating amplitudes vanish in the same limit.


title:
Implications of measured properties of the mixing matrix on mass
  matrices

abstract:
  It is shown how the two experimentally measurable properties of the mixing
matrix $V$, the asymmetry Delta(V)=|V_{12}|^2- |V_{21}|^2 of V with respect to
the main diagonal and the Jarlskog invariant
J(V)=Im(V_{11}V_{12}^*V_{21}^*V_{22}), can be exploited to obtain constraints
on possible structures of mass matrices in the quark sector. Specific mass
matrices are examined in detail as an illustration.


title: Mirror matter admixtures in K_L to mu^+ mu^-

abstract:
  Our previous analysis on the contributions of mirror matter admixtures in
ordinary hadrons to K_L to gamma gamma is extended to study the relevance of
such contributions to the K_L to mu^+ mu^- rare decay. The mixing angle of the
admixtures previously determined to describe the enhancement phenomenon in two
body non-leptonic decays of strange hadrons is used, along with recent results
for the description of the strong and electromagnetic interaction parts of the
transition amplitudes. We find that these admixtures give a significant
contribution with a small SU(3) breaking of only 2.8%, we also find a value of
\sim -17.9^{\circ} for the eta-eta' mixing angle consistent with some of its
determinations in the literature and a preferred negative value around -16 for
the local counter-term contribution chi_1 + chi_2 consistent with the existence
of a unique counter-term assuming lepton universality. We conclude that those
mixings may be relevant in low energy physics and should not be ignored.


title:
Order parameter of the chiral symmetry breaking Green Functions at one
  loop

abstract:
  Since order parameter of the chiral symmetry breaking Green Functions are a
useful link between the OPE expansion and chiral perturbation theory we perform
a calculation to the NLO in alpha_s, working in the chiral limit, for all the 2
and 3 point ones. These Green Functions have no perturbative term in the chiral
limit and thence their main contribution comes from the quark condensate
operator.


title:
Constraints on flavor-dependent long range forces from solar neutrinos
  and KamLAND

abstract:
  Flavor-dependent long range (LR) leptonic forces, like those mediated by the
$L_e-L_\mu$ or $L_e -L_\tau$ gauge bosons, constitute a minimal extension of
the standard model that preserves its renormalizability. We study the impact of
such interactions on the solar neutrino oscillations when the interaction range
$R_{LR}$ is much larger than the Earth-Sun distance. The LR potential can
dominate over the standard charged current potential inside the Sun in spite of
strong constraints on the coupling $\alpha$ of the LR force coming from the
atmospheric neutrino data and laboratory search for new forces. We demonstrate
that the solar and atmospheric neutrino mass scales do not get trivially
decoupled even if $\theta_{13}$ is vanishingly small. In addition, for $\alpha
\gsim 10^{-52}$ and normal hierarchy, resonant enhancement of $\theta_{13}$
results in nontrivial energy dependent effects on the $\nu_e$ survival
probability. We perform a complete three generation analysis, and obtain
constraints on $\alpha$ through a global fit to the solar neutrino and KamLAND
data. We get the $3\sigma$ limits $\alpha_{e\mu} < 3.4 \times 10^{-53}$ and
$\alpha_{e\tau} < 2.5 \times 10^{-53}$ when $R_{LR}$ is much smaller than our
distance from the galactic center. With larger $R_{LR}$, the collective LR
potential due to all the electrons in the galaxy becomes significant and the
constraints on $\alpha$ become stronger by upto two orders of magnitude.


title: Strange baryon production asymmetry in K(+-)N interactions

abstract:
  The asymmetry of strange baryon production in Kp interactions at high
energies is considered in the framework of the Quark-Gluon String Model. The
contribution of the String-Junction Mechanism to the strange baryon production
is analysed.


title: A New Gauge Mediation Theory

abstract:
  We propose a class of models with gauge mediation of supersymmetry breaking,
inspired by simple brane constructions, where R-symmetry is very weakly broken.
The gauge sector has an extended N=2 supersymmetry and the two electroweak
Higgses form an N=2 hypermultiplet, while quarks and leptons remain in N=1
chiral multiplets. Supersymmetry is broken via the D-term expectation value of
a secluded U(1) and it is transmitted to the Standard Model via gauge
interactions of messengers in N=2 hypermultiplets: gauginos thus receive Dirac
masses. The model has several distinct experimental signatures with respect to
ordinary models of gauge or gravity mediation realizations of the Minimal
Supersymmetric Standard Model (MSSM). First, it predicts extra states as a
third chargino that can be observed at collider experiments. Second, the
absence of a D-flat direction in the Higgs sector implies a lightest Higgs
behaving exactly as the Standard Model one and thus a reduction of the `little'
fine-tuning in the low tan(beta) region. This breaking of supersymmetry can be
easily implemented in string theory models


title:
QCD Sum Rules: From quantum-mechanical oscillator to pion structure in
  QCD

abstract:
  We illustrate the general scheme of the Sum Rule (SR) method using 2D Quantum
Harmonic Oscillator (2DQHO) as a toy model. We introduce correlator, related to
Green function of 2DQHO, and describe the property of Asymptotic Freedom for
2DQHO. We explain how the duality conception allows one to describe excited
states. Finally we present numerical results and extract some lessons to learn
from our exposition. Then we switch to the QCD and show that QCD SRs supply us
the method to study hadrons in non-perturbative QCD. Here the main emphasis is
put on the pion and its distribution amplitude and form factors.


title:
One-loop calculations of the decay of the next-to-lightest neutralino in
  the MSSM

abstract:
  We calculate one-loop corrections to the decays of the next-to-lightest
neutralino $\tilde{\chi}_2^0$ into the lightest neutralino $\tilde{\chi}_1^0$
and two leptons; this includes diagrams where a real photon is emitted. In
cases where two-body decays $\tilde{\chi}_2^0 \to \tilde{l}^\pm_1 l^\mp \to
\tilde{\chi}_1^0 l^- l^+$ are kinematically allowed, we calculate these decays
both with and without the single-pole approximation, and find consistent
results. For example, for the minimal supergravity parameter set SPS1a, the
integrated partial widths (the branching ratios) for $\tilde{\chi}_2^0\to
\tilde{\chi}_1^0 l^- l^+ (l = e, \mu)$ are enhanced by about 15.5 (13.6)
percent by the one-loop corrections. We also study a scenario where $\tilde
\chi_2^0$ cannot undergo two-body decays, and find corrections to these
branching ratios of about 13.6 percent. Moreover, we study the dilepton
invariant mass ($M_{l^+ l^-}$) distribution, whose endpoint is often used in
analyses that aim to reconstruct (differences of) supersymmetric particle
masses at the LHC. The shape of this distribution is altered significantly by
the emission of hard photons. For example, for the SPS1a parameter set the peak
of the $M_{l^+ l^-}$ distribution is shifted by several GeV when these
contributions are included.


title: QCD branch in SANC

abstract:
  The QCD sector of the system SANC is presented. QCD theoretical predictions
for several processes of high energy interactions of fundamental particles at
the one-loop precision level for up to some 3- and 4-particle processes are
implemented.


title: QCD Effects in the Decays of TeV Black Holes

abstract:
  In models with ``large'' and/or warped extra dimensions, the
higher-dimensional Planck scale may be as low as a TeV. In that case black
holes with masses of a few TeV are expected to be produced copiously in
multi-TeV collisions, in particular at the LHC. These black holes decay through
Hawking radiation into typically O(20) Standard Model particles. Most of these
particles would be strongly interacting. Naively this would lead to a final
state containing 10 or so hadronic jets. However, it has been argued that the
density of strongly interacting particles would be so large that they
thermalize, forming a ``chromosphere'' rather than well-defined jets. In order
to investigate this, we perform a QCD simulation which includes parton-parton
scattering in addition to parton showering. We find the effects of parton
scattering to remain small for all cases we studied, leading to the conclusion
that the decays of black holes with masses within the reach of the LHC will not
lead to the formation of chromospheres.


title: Tetrons - a possible Solution to the Family Problem

abstract:
  A model is presented, in which fermion and vector boson states are
constructed from constituents (tetrons). The model encodes all observed
structures and phenomena of elementary particle physics in group theoretic
items of the permutation group S_4. Details of the model like symmetry
breaking, distribution of charges and mass generation are worked out. As a
sideproduct a deeper understanding of parity violation is obtained.


title: Mirror matter admixtures in K_S to gamma gamma

abstract:
  The latest measurement of the K_S to gamma gamma branching ratio clearly
shows an enhancement over the current theoretical prediction. As in other K and
B meson decays, this invites to consider the possibility of the contribution of
new physics. We study a particular form of the latter, which may be referred to
as manifest mirror symmetry. The experimental data are described using
previously determined values for the mixing angles of the admixtures of mirror
matter in ordinary hadrons and by assuming that for pi^0, eta, eta', the mirror
decay amplitudes have the same magnitudes as their ordinary counterparts.


title:
Searching for Dark Matter in Unification Models: A Hint from Indirect
  Sensitivities towards Future Signals in Direct Detection and B-decay

abstract:
  A comparison is made between accelerator and direct detection constraints in
constrained versions of the minimal supersymmetric standard model. Models
considered are based on mSUGRA, where scalar and gaugino masses are unified at
the GUT scale.
  In addition, the mSUGRA relation between the (unified) A and B parameters is
assumed, as is the relation between $m_0$ and the gravitino mass.
  Also considered are models where the latter two conditions are dropped
  (the CMSSM), and a less constrained version where the Higgs soft masses are
not unified at the GUT scale (the NUHM).


title: Unification without low-energy supersymmetry

abstract:
  Without supersymmetry, the gauge couplings in the standard model with five
Higgs doublets unify around 10^14 GeV. In this case, the trinified model,
SU(3)_C x SU(3)_L x SU(3)_R x Z_3, with the minimal Higgs sector required for
symmetry breaking, is the ideal grand-unified candidate. Small neutrino masses
are generated via a radiative seesaw mechanism, without the need for
intermediate scales, additional Higgs fields, or higher-dimensional operators.
The proton lifetime is above the experimental limits, with the decay modes p ->
\bar\nu K^+ and p -> mu^+ K^0 potentially observable. The split-SUSY version of
the model, with one light Higgs doublet, is equally attractive.


title: Light Higgs Production in Hyperon Decay

abstract:
  A recent HyperCP observation of three events in the decay Sigma^+ -> p mu^+
mu^- is suggestive of a new particle with mass 214.3 MeV. In order to confront
models that contain a light Higgs boson with this observation, it is necessary
to know the Higgs production rate in hyperon decay. The contribution to this
rate from penguin-like two-quark operators has been considered before and found
to be too large. We point out that there are additional four-quark
contributions to this rate that could be comparable in size with the two-quark
contributions, and that could bring the total rate to the observed level in
some models. To this effect we implement the low-energy theorems that dictate
the couplings of light Higgs bosons to hyperons at leading order in chiral
perturbation theory. We consider the cases of scalar and pseudoscalar Higgs
bosons in the standard model and in its two-Higgs-doublet extensions to
illustrate the challenges posed by existing experimental constraints and
suggest possible avenues for models to satisfy them.


title: Neutrino Mass and Baryon Asymmetry from Dirac Seesaw

abstract:
  We extend the visible content of the standard model (SM) with a hidden sector
composed of three right-handed singlet neutrinos and one singlet Higgs. These
extra singlets are charged under a new U(1)_X gauge symmetry while the SM
particles are not. Two heavy scalar doublets are introduced to play the role of
the messengers between the visible and hidden sectors. The neutrinos naturally
acquire tiny Dirac masses because the ratio of weak scale over the heavy
messenger masses is highly suppressed. Furthermore, the heavy messengers
simultaneously generate baryon asymmetry of the universe through their
out-of-equilibrium CP-violating decays.


title: Signatures of Double Charged Higgs in $SU(3)_L\otimes U(1)_N$ model

abstract:
  The scalar sector of the simplest version of the 3-3-1 electroweak models is
constructed with three Higgs triplets only. We show that a relation involving
two of the constants of the Higgs potential, two vacuum expectation values of
the neutral scalars and the mass of the doubly charged Higgs boson leads to
important information concerning the signals of this scalar particle.


title: Possible Signals of Wino LSP at the Large Hadron Collider

abstract:
  We consider a class of anomaly-mediated supersymmetry breaking models where
gauginos acquire masses mostly from anomaly mediation while masses of other
superparticles are from Kahler interactions, which are as large as gravitino
mass, O(10-100) TeV. In this class of models, the neutral Wino becomes the
lightest superparticle in a wide parameter region. The mass splitting between
charged and neutral Winos are very small and experimental discovery of such
Winos is highly non-trivial. We discuss how we should look for Wino-induced
signals at Large Hadron Collider.


title:
The Hidden Charm Decay of $X(3872), Y(3940)$ and Final State Interaction
  Effects

abstract:
  We investigate whether the final state interaction (FSI) effect plays a
significant role in the large hidden charm decay width of X(3872) and Y(3940)
using a model. Our numerical result suggests (1) the FSI contribution to
$X(3872)\to J/\psi\rho $ is tiny; (2) $\Gamma[ Y(3940)\to
D\bar{D}^{*}+\text{h.c.}\to J/\psi\omega ]$ from FSI is around several keV, far
less than Belle's experimental value 7 MeV.


title: Flavor Democracy in Particle Physics

abstract:
  The flavor democracy hypothesis was introduced in seventies taking in mind
three Standard Model (SM) families. Later, this idea was disfavored by the
large value of the t-quark mass. In nineties the hypothesis was revisited
assuming that extra SM families exist. According to flavor democracy the fourth
SM family should exist and there are serious arguments disfavoring the fifth SM
family. The fourth SM family quarks lead to essential enhancement of the Higgs
boson production cross-section at hadron colliders and the Tevatron can
discover the Higgs boson before the LHC, if it mass is between 140 and 200 GeV.
Then, one can handle "massless" Dirac neutrinos without see-saw mechanism.
Concerning BSM physics, flavor democracy leads to several consequences:
tan(beta) approx.eq. 40 if there are three MSSM families; super-partner of the
right-handed neutrino can be the LSP; relatively light E(6)-inspired isosinglet
quark etc. Finally, flavor democracy may give opportunity to handle "massless"
composite objects within preonic models.


title:
Constraints on the anomalous tensor operators from B\to\phi K^{\ast},
  \eta K^{\ast}$ and \eta K decays

abstract:
  We investigate whether the anomalous tensor operators with the Lorentz
structure $\sigma_{\mu\nu} (1+\gamma_{5})\otimes
\sigma^{\mu\nu}(1+\gamma_{5})$, which could provide a simple resolution to the
polarization anomaly observed in $B\to \phi K^{\ast}$ decays, could also
provide a coherent resolution to the large ${\cal B}(B\to \eta K^{\ast})$ and
survive bounds from $B\to\eta K$ decays. Parameter spaces satisfying all these
experimental data are obtained, and found to be dominated by the color-octet
tensor operator contribution. Constraints for the equivalent solution with
$(1+\gamma_{5})\otimes(1+\gamma_{5})$ operators are also derived and found to
be dominated by the color-singlet one. With the constrained parameter spaces,
we finally give predictions for $B_{s}\to \phi \phi$ decay, which could be
tested at the Fermilab Tevatron and the LHC-b experiments.


title: Constraints on New Physics from Matter Effects on Neutrino Oscillation

abstract:
  We discuss whether constraints can be placed on new physics from a
hypothetical Fermilab to Hyper-Kamiokande neutrino oscillation experiment.


title: Evolution equations for truncated moments of the parton distributions

abstract:
  We derive evolution equations for the truncated Mellin moments of the parton
distributions. We find that the equations have the same form as those for the
partons themselves. The modified splitting function for n-th moment $P'(n,x)$
is $x^{n}P(x)$, where $P(x)$ is the well-known splitting function from the
DGLAP equation. The obtained equations are exact for each n-th moment and for
every truncation point $x_0\in (0;1)$. They can be solved with use of standard
methods of solving the DGLAP equations. This approach allows us to avoid the
problem of dealing with the unphysical region $x\to 0$. Furthermore, it refers
directly to the physical values - moments (rather than to the parton
distributions), what enables one to use a wide range of deep-inelastic
scattering data in terms of smaller number of parameters. We give an example of
an application.


title:
Strong Decays of Charmed Baryons in Heavy Hadron Chiral Perturbation
  Theory

abstract:
  Strong decays of charmed baryons are analyzed in the framework of heavy
hadron chiral perturbation theory (HHChPT) in which heavy quark symmetry and
chiral symmetry are synthesized. HHChPT works excellently for describing the
strong decays of s-wave charmed baryons. For L=1 orbitally excited states, two
of the unknown couplings, namely, $h_2$ and $h_{10}$, are determined from the
resonant $\Lambda_c^+\pi\pi$ mode produced in the $\Lambda_c(2593)$ decay and
the width of $\Sigma_c(2800)$, respectively. Predictions for the strong decays
of the p-wave charmed baryon states $\Lambda_c(2625)$, $\Xi_c(2790)$ and
$\Xi_c(2815)$ are presented. Since the decay
$\Lambda_c(2593)^+\to\Lambda_c^+\pi\pi$ receives non-resonant contributions,
our value for $h_2$ is smaller than the previous estimates. We also discuss the
first positive-parity excited charmed baryons. We conjecture that the charmed
baryon $\Lambda_c(2880)$ with $J^P=\frac52^+$ is an admixture of
$\Lambda_{c2}(\frac52^+)$ with and $\tilde\Lambda''_{c3}(\frac52^+)$; both are
L=2 orbitally excited states. The potential model suggests $J^P=\frac52^-$ or
$\frac32^+$ for $\Lambda_c(2940)^+$. Measurements of the ratio of
$\Sigma_c^*\pi/\Sigma_c\pi$ will enable us to discriminate the $J^P$
assignments for $\Lambda_c(2940)$. We advocate that the $J^P$ quantum numbers
of $\Xi_c(2980)$ and $\Xi_c(3077)$ are $\frac12^+$ and $\frac52^+$,
respectively. Under this $J^P$ assignment, it is ready to understand why
$\Xi_c(2980)$ is broader than $\Xi_c(3077)$.


title: QCD Corrections to Higgs Pair Production in Bottom Quark Fusion

abstract:
  We present a complete next-to-leading order (NLO) calculation for the total
cross section of inclusive Higgs pair production via bottom-quark fusion
($b\bar{b} \to hh$) at the CERN Large Hadron Collider (LHC) in the Standard
Model. The NLO QCD corrections lead to less dependence on the renormalization
scale ($\mu_R$) and the factorization scale ($\mu_F$) than the leading-order
(LO) cross section, and they significantly increase the LO cross section. The
rate for inclusive Higgs pair production is small in the Standard Model, but
can be large in models with enhanced couplings of the $b$ quark to the Higgs
bosons.


title: Introduction to Color Superconductivity

abstract:
  At high nuclear density and small temperature, due to the asymptotic freedom
property of Quantum ChromoDynamics and to the existence of an attractive
channel in the color interaction, diquark condensates might be formed. Since
these condensates break the color gauge symmetry, this phenomenon has the name
of color superconductivity. In the last few years this has become a very active
field of research. While a direct experimental test is still missing, color
superconductivity might have implications in astrophysics because for some
compact stars, e.g. pulsars, the baryon densities necessary for color
superconductivity can probably be reached.


title: Light scalars coupled to photons and non-newtonian forces

abstract:
  A particle $\phi$ coupling to two photons couples also to charged particles,
like protons, through a loop. If the particle is a light scalar this induced
coupling to protons leads to non-newtonian forces. We show that the
experimental constraints on exotic, fifth-type forces lead to stringent
constraints on the $\phi\gamma\gamma$ coupling.


title: Hyperspherical harmonic study of identical-flavor four-quark systems

abstract:
  We present an exact method based on a hyperspherical harmonic expansion to
study systems made of quarks and antiquarks of the same flavor. Our formalism
reproduces and improves the results obtained with variational approaches. This
analysis shows that identical-flavor four-quark systems with non-exotic
$2^{++}$ quantum numbers may be bound independently of the quark mass. $0^{+-}$
and $1^{+-}$ states become attractive only for larger quarks masses.


title: Symmetry patterns in the $(N,\Delta)$ spectrum

abstract:
  We revise the role played by symmetry in the study of the low-lying baryon
spectrum and comment on the difficulties when trying to generalize the symmetry
pattern to higher energy states. We show that for the $(N,\Delta)$ part such a
generalization is plausible allowing the identification of spectral
regularities and the prediction of until now non-identified resonances.


title: Confined Chiral Solitons in the Spectral Quark Model

abstract:
  Chiral solitons with baryon number one are investigated in the Spectral Quark
Model. In this model the quark propagator is a superposition of complex-mass
propagators weighted with a suitable spectral function. This technique is a
method of regularizing the effective quark theory in a way preserving many
desired features crucial in analysis of solitons. We review the model in the
vacuum sector, stressing the feature of the absence of poles in the quark
propagator. We also investigate in detail the analytic structure of meson
two-point functions. We provide an appropriate prescription for constructing
valence states in the spectral approach. The valence state in the baryonic
soliton is identified with a saddle point of the Dirac eigenvalue treated as a
function of the spectral mass. Due to this feature the valence quarks never
become unbound nor dive into the negative spectrum, hence providing stable
solitons as absolute minima of the action. This is a manifestation of the
absence of poles in the quark propagator. Self-consistent mean field hedgehog
solutions are found numerically and some of their properties are determined and
compared to previous chiral soliton models. Our analysis constitutes an
involved example of a treatment of a relativistic complex-mass system.


title:
Towards a determination of the chiral couplings at NLO in 1/N(C):
  L_8(mu) and C_38(mu)

abstract:
  We present a dispersive method which allows to investigate the low-energy
couplings of chiral perturbation theory at the next-to-leading order (NLO) in
the 1/N(C) expansion, keeping full control of their renormalization scale
dependence. Using the resonance chiral theory Lagrangian, we perform a NLO
calculation of the scalar and pseudoscalar two-point functions, within the
single-resonance approximation. Imposing the correct QCD short-distance
constraints, one determines their difference Pi(t)=Pi_S(t)-Pi_P(t) in terms of
the pion decay constant and resonance masses. Its low momentum expansion fixes
then the low-energy chiral couplings L_8 and C_38. At mu_0=0.77 GeV, we obtain
L_8(mu_0)^{SU(3)} = (0.6+-0.4)10^{-3} and C_{38}(mu_0)^{SU(3)}=(2+-6)10^{-6}.


title:
Properties of confining gauge field configurations in the pseudoparticle
  approach

abstract:
  The pseudoparticle approach is a numerical method to approximate path
integrals in SU(2) Yang-Mills theory. Path integrals are computed by summing
over all gauge field configurations, which can be represented by a linear
superposition of a small number of pseudoparticles with amplitudes and color
orientations as degrees of freedom. By comparing different pseudoparticle
ensembles we determine properties of confining gauge field configurations. Our
results indicate the importance of long range interactions between
pseudoparticles and of non trivial topological properties.


title: Fluctuations, correlations and non-extensivity

abstract:
  The present status of investigations on fluctuations and correlations seen in
high energy multiparticle production processes made using the notion of
nonextensivity is reviewed.


title: A novel approach to light-front perturbation theory

abstract:
  We suggest a possible algorithm to calculate one-loop n-point functions
within a variant of light-front perturbation theory. The key ingredients are
the covariant Passarino-Veltman scheme and a surprising integration formula
that localises Feynman integrals at vanishing longitudinal momentum. The
resulting expressions are generalisations of Weinberg's infinite-momentum
results and are manifestly Lorentz invariant. For n = 2 and 3 we explicitly
show how to relate those to light-front integrals with standard energy
denominators. All expressions are rendered finite by means of transverse
dimensional regularisation.


title:
Spin light of neutrino in matter: a new type of electromagnetic
  radiation

abstract:
  A short review of the properties of the spin light of neutrino ($SL\nu$) in
matter, supplied with some historical notes on the discussed subject, is given.
It is shown that consideration of the $SL\nu$ in matter in hep-ph/0605114 is
based on erroneous calculations which ignore the fact that the energy-momentum
conservation law can not be violated for this process. An attempt to rename the
$SL\nu$ in matter, undertaken in hep-ph/0606262, is groundless.


title: Inflation, Strings, CMB anisotropies and Leptogenesis

abstract:
  In this talk, I shall focus on theories beyond the Standard Model which
predict massive neutrinos. Hybrid inflation emerges naturally in these
theories: the slow-rolling inflaton field is a gauge singlet which couples with
a GUT Higgs field which triggers the end of inflation. In the standard
scenario, spontaneous symmetry breaking takes place at the end of inflation at
a scale $M$; $M_{GUT} > M > M_Z$ for inflation to solve the GUT monopole
problem and cosmic strings always form at this intermediate scale. WMAP data
constrain $M \in [10^{14.5}-10^{15.5}]$ GeV and the singlet-Higgs coupling
$\kappa \in [10^{-7} - 10^{-2}]$. The spectral index $n_s \gtrsim 0.98$ in
slight conflict with WMAP3. When the symmetry which is broken at the end of
inflation is gauged $B-L$, both the inflaton and the strings decay into
right-handed neutrinos. There are then two competing non-thermal scenarios for
baryogenesis via leptogenesis which take place at the end of inflation, during
reheating and from cosmic strings decay. Which of the two scenarios dominates
depends on the inflaton-neutrino sector parameters.


title:
Small x Behavior of Parton Distributions from the Observed Froissart
  Energy Dependence of the Deep Inelastic Scattering Cross Section

abstract:
  We fit the reduced cross section for deep-inelastic electron scattering data
to a three parameter ln^2 s fit, A + beta ln^2 (s/s_0), where s= [Q^2/x] (1-x)
+ m^2, and Q^2 is the virtuality of the exchanged photon. Over a wide range in
Q^2 (0.11 < Q^2 < 1200 GeV^2) all of the fits satisfy the logarithmic energy
dependence of the Froissart bound. We can use these results to extrapolate to
very large energies and hence to very small values of Bjorken x -- well beyond
the range accessible experimentally. As Q^2 --> infinity, the structure
function F_2^p(x, Q^2) exhibits Bjorken scaling, within experimental errors. We
obtain new constraints on the behavior of quark and antiquark distribution
functions at small x.


title:
Study of the singly charged Higgs in the economic at 3-3-1 model at
  e^+e^ colliders

abstract:
  The $\mathrm {SU}(3)_C\otimes \mathrm {SU}(3)_L \otimes {\mathrm U}(1)_X$
gauge model with two Higgs triplets (the economical 3-3-1 model) are presented.
This model predicts a new singly-charged Higgs bosons $H_2^\pm$, namely a
scalar bilepton (a particle of lepton number 2) with mass proportional to the
bilepton mass $M_Y$ through the coefficient $\la_4$. Pair production of
$H_2^\pm$ at high energy $e^+ e^-$ colliders with polarization of $e^+$, $e^-$
beams was studied in detail.
  Numerical evaluation shows that if Higgs mass is not too heavy and at high
degree of polarization then the reaction can give observable cross section in
future colliders. The reaction $e^+ e^- \to H^{-}_2W^+ $ is also examined.
Based on the result, it shows that production cross sections of $H^{-}_2W^+$
are very small, much below pair production of $H^{\pm}_2$, so that the direct
production of them is in general not expected to lead to easily observable
signals in $e^+e^-$ annihilation.


title:
Rare and CP-Violating K and B Decays in the Littlest Higgs Model with
  T-Parity

abstract:
  We calculate the most interesting rare and CP-violating K and B decays in the
Littlest Higgs model with T-parity. We give a collection of Feynman rules
including v^2/f^2 contributions that are presented here for the first time and
could turn out to be useful also for applications outside flavour physics. We
adopt a model-independent parameterization of rare decays in terms of the gauge
independent functions X_i,Y_i,Z_i (i=K,d,s), which is in particular useful for
the study of the breaking of the universality between K, B_d and B_s systems
through non-MFV interactions. Performing the calculation in the unitary and 't
Hooft-Feynman gauge, we find that the final result contains a divergence which
signals some sensitivity to the ultraviolet completion of the theory. Including
an estimate of this contribution, we calculate the branching ratios for the
decays $K^+\to\pi^+\nu\bar\nu$, $K_L\to\pi^0\nu\bar\nu$, $B_{s,d}\to
\mu^+\mu^-$, $B\to X_{s,d}\nu\bar\nu$, $K_L \to\pi^0\ell^+\ell^-$ and $B\to
X_{s,d}\ell^+\ell^-$, paying particular attention to non-MFV contributions
present in the model.
  Imposing all available constraints we find that the decay rates for $B_{s,d}
\to \mu^+ \mu^-$ and $B \to X_{s,d} \nu \bar \nu$ can be enhanced by at most
50% and 35% relative to the SM values, while $Br(K^+\to\pi^+\nu\bar\nu)$ and
$Br(K_L\to\pi^0\nu\bar\nu)$ can be both as high as $5 \cdot 10^{-10}$.
Significant enhancements of the decay rates $K_L \to\pi^0\ell^+\ell^-$ are also
possible. Simultaneously, the CP-asymmetries $S_{\psi \phi}$ and
$A^s_\text{SL}$ can be enhanced by an order of magnitude, while the electroweak
penguin effects in $B \to \pi K$ turn out to be small, in agreement with the
recent data.


title: 2+1 flavor simulations of QCD with improved staggered quarks

abstract:
  The MILC collaboration has been performing realistic simulations of full QCD
with 2+1 flavors of improved staggered quarks. Our simulations allow for
controlled continuum and chiral extrapolations. I present results for the light
pseudoscalar sector: masses and decay constants, quark masses and
Gasser-Leutwyler low-energy constants. In addition I will present some results
for heavy-light mesons, decay constants and semileptonic form factors, obtained
in collaboration with the HPQCD and Fermilab lattice collaborations. Such
calculations will help in the extraction of CKM matrix elements from
experimental measurements.


title: Mini review on saturation and recent developments

abstract:
  I discuss the saturation regime of QCD: the weak-coupling regime that
describes large parton densities inside hadrons and the resulting high-energy
behavior of scattering amplitudes. I briefly review past successes in the
context of deep inelastic scattering at HERA and forward particle production at
RHIC, and I present some recent progresses that significantly improved our
understanding of high-energy scattering in QCD.


title: Upgraded experiments with super neutrino beams: Reach versus Exposure

abstract:
  We introduce exposure as a means to making balanced comparisons of the
sensitivities of long-baseline neutrino experiments to a nonzero \theta_{13},
to CP violation and to the neutrino mass hierarchy. We illustrate its use by
comparing the sensitivities of possible upgrades of superbeam experiments,
namely NOvA*, T2KK and experiments with wide band beams. For the proposed
exposures, we find the best nominal CP violation performance for T2KK. For
equal exposures, a wide band beam experiment has the best mass hierarchy
performance. The physics concept on which NOvA* is based has the best potential
for discovering CP violation only for exposures above a threshold value.


title: Electroweak Constraints on Effective Theories

abstract:
  We discuss electroweak constraints on TeV scale extensions of the standard
model. To obtain model-independent results, effective theory approach is
adopted. Constraints are given on arbitrary linear combinations of a set of
dimension-6 operators that respect the SM gauge symmetry, as well as CP, lepton
and baryon number conservation. Applications of the results are also discussed.


title:
The Pomeranchuk Singularity and Vector Boson Reggeization in Electroweak
  Theory

abstract:
  We investigate the high energy behaviour of vector boson scattering in the
electroweak sector of the standard model. In analogy with the BFKL analysis in
QCD we compute production amplitudes in the multi-Regge limit and derive, for
the vacuum exchange channel, the integral equation for vector particle
scattering. We also derive and solve the bootstrap equations for the isospin-1
exchange channel, both for the reggeizing charged and non-reggeizing neutral
vector bosons.


title:
Resonance Form-Factors: L8 Determination at Next-to-Leading Order in
  1/NC

abstract:
  This talk presents a systematic procedure for the computation of the SS-PP
correlator beyond the large--NC limit. The present calculation is carried on
within a perturbative 1/NC framework . By constraining the meson form-factors
at leading order in 1/NC, one obtains a one-loop spectral function well behaved
at short distances. The Weinberg sum-rules get modified, gaining an extra
contribution suppressed by 1/NC. This leads to a prediction for the low energy
chiral perturbation theory coupling L8^r(mu) at the one-loop level, i.e., up to
next-to-leading order in 1/NC.


title: Anomaly of discrete family symmetries and gauge coupling unification

abstract:
  Anomaly of discrete symmetries can be defined as the Jacobian of the
path-integral measure. We assume that an anomalous discrete symmetry at low
energy is remnant of an anomaly free discrete symmetry, and that its anomaly is
cancelled by the Green-Schwarz(GS) mechanism at a more fundamental scale. If
the Kac-Moody levels k_i assume non-trivial values, the GS cancellation
conditions of anomaly modify the ordinary unification of gauge couplings. This
is most welcome, because for a renormalizable model to be realistic any
non-abelian family symmetry, which should not be hardly broken low-energy,
requires multi SU(2)_L doublet Higgs fields. As an example we consider a
recently proposed supersymmetric model with Q_6 family symmetry. In this
example, k_2=1, k_3=3 satisfies the GS conditions and the gauge coupling
unification appears close to the Planck scale.


title: Mixing and CP-Violation in the Littlest Higgs Model with T-Parity

abstract:
  The results of an extensive flavour physics analysis in the Littlest Higgs
model with T-parity are presented. In particular, mixing and CP-violation in
K^0 and B^0_{d,s} systems have been studied. Several scenarios defined by the
values of mirror quark masses and the parameters of the new flavour mixing
matrix V_Hd have been considered. A very interesting scenario is identified,
where the well-known kaon constraints are satisfied, the sin(2beta) and Delta
M_s issues are improved w.r.t the Standard Model and visible effects could be
soon found in A_SL^s and S_{psi phi}.


title:
Fermion Masses at intermediate Tan(beta): Unification of Yukawa
  Determinants

abstract:
  In the context of the Grand Unified MSSM, we investigate the fermion mass
matrices at GUT scale. We note that from the experimental mass pattern the
determinants of the Yukawa matrices at this scale can be unified with good
precision. Taking the unification o determinants as an hypothesis, it gives two
model independent predictions that in the MSSM turns out to determine an
appropriate value for the product m_d m_s and tan(beta)~7-10 in the favored
range. We then review a predictive model of SU(3) flavour in the context of
supersymmetric SO(10) that nicely implements this mechanism, while explaining
all fermion masses and mixings at 1 sigma level, including neutrino data.


title: Collins Effect in SIDIS and in ${\bf e^+e^-}$ Annihilation

abstract:
  We review the present understanding of the nucleon transversity distribution
and Collins fragmentation function, based on Ref.\cite{Efremov:2006qm}, and
discuss how Drell-Yan experiments will improve it.


title:
From theory to experiment: hadron electromagnetic form factors in
  space-like and time-like regions

abstract:
  Hadron electromagnetic form factors contain dynamical information on the
intrinsic structure of the hadrons. The pioneering work developed at the
Kharkov Physical-Technical Institute in the 60's on the relation between the
polarized cross section and form factors triggered a number of experiments.
Such experiments could be performed only recently, due to the progress in
accelerator and polarimetry techniques. The principle of these measurements is
recalled and the surprising and very precise results obtained on proton are
presented. The actual status of nucleon electromagnetic form factors is
reviewed, with special attention to the basic work done in Kharkov Institute.


title: Dispersive approach in Sudakov resummation

abstract:
  The dispersive approach to power corrections is given a precise
implementation, valid beyond single gluon exchange, in the framework of Sudakov
resummation for deep inelastic scattering and the Drell-Yan process. It is
shown that the assumption of infrared finite Sudakov effective couplings
implies the universality of the corresponding infrared fixed points. This
property is closely tied to the universality of the virtual contributions to
space-like and time-like processes, encapsulated in the second logarithmic
derivative of the quark form factor.


title:
Nonperturbative and Perturbative Aspects of Photo- and Electroproduction
  of Vector Mesons

abstract:
  We discuss various aspects of vector meson production, first analysing the
interplay between perturbative and nonperturbative aspects of the QCD
calculation. Using a general method adapted to incorporate both perturbative
and nonpertubative aspects, we show that nonperturbative effects are important
for all experimentally available values of the photon virtuality Q2. We compare
the huge amount of experimental information now available with our theoretical
results obtained using a specific nonperturbative model without free
parameters, showing that quite simple features are able to explain the data.


title:
The effective electroweak mixing angle $\sin^2\theta_{eff}$ with
  two-loop bosonic contributions

abstract:
  We present the results for the full electroweak two-loop bosonic
contributions to the effective leptonic mixing angle of the $Z$ boson,
$\sin^2\theta_{\rm eff}$, in the Standard Model. A method applied to extract
collinear divergences from two-loop vertex-functions is described. Comparisons
of our results with those from a recent previous calculation show complete
agreement.


title:
J/psi suppression and the nuclear absorption decrease with increasing
  energy

abstract:
  In the field theoretical Glauber-Gribov framework in the eikonal
approximation, we show that, in hadron-nucleus collisions in the high-energy
limit and under especific conditions, the rescattering contributions to the
J/psi production cross-section vanish, leading to an A^1 dependence on the
atomic number A -- except for nuclear effects in the nucleus structure
function, the so-called shadowing. We show that the RHIC data on $J/\psi$
production in d-Au collisions can be described with nuclear shadowing alone
(sigma_{abs} = 0). The corresponding results for Au-Au collisions are also
presented and compared with available data.


title:
Twist-3 Formalism for Single Transverse Spin Asymmetry Reexamined:
  Semi-Inclusive Deep Inelastic Scattering

abstract:
  We study the single spin asymmetry (SSA) for the pion production in
semi-inclusive deep inelastic scattering, $ep^\uparrow\to e\pi X$, in the
framework of the collinear factorization. We derive the complete cross section
formula associated with the twist-3 quark-gluon correlation functions for the
transversely polarized nucleon, including all types of pole (hard-pole,
soft-fermion-pole and soft-gluon-pole) contributions which produce the strong
interaction phase necessary for SSA. We prove that the partonic hard part from
each pole contribution satisfies certain constraints from Ward identities for
color gauge invariance. We demonstrate that the use of these new constraints is
crucial to reorganize the collinear expansion of the Feynman diagrams into
manifestly gauge-invariant form so as to obtain the factorization formula for
the cross section in terms of a complete set of the twist-3 distributions
without any double counting. It also provides a simpler method for the actual
calculation. We also present a simple estimate of SSA based on our cross
section formula, using a model for the ``soft-gluon-pole function'' that
represents the relevant twist-3 quark-gluon correlation, and compare the
magnitude of the terms involving the derivative of the soft-gluon-pole function
with that of the ``non-derivative'' terms.


title: Forward dispersion relations and Roy equations in pi-pi scattering

abstract:
  We review results of an analysis of pipi interactions in S, P and D waves for
two-pion effective mass from threshold to about 1.4 GeV. In particular we show
a recent improvement of this analysis above the K anti-K threshold using more
data for phase shifts and including the S0 wave inelasticity from pipi -> K
anti-K. In addition, we have improved the fit to the f2(1270) resonance and
used a more flexible P wave parametrization above the K anti-K threshold and
included an estimation of the D2 wave inelasticity. The better accuracy thus
achieved also required a refinement of the Regge analysis above 1.42 GeV. We
have checked that the pipi scattering amplitudes obtained in this approach
satisfy remarkably well forward dispersion relations and Roy's equations.


title: Slepton pair production at hadron colliders

abstract:
  In R-parity conserving supersymmetric models, sleptons are produced in pairs
at hadron colliders. We show that measurements of the longitudinal single-spin
asymmetry at possible polarization upgrades of existing colliders allow for a
direct extraction of the slepton mixing angle. A calculation of the
transverse-momentum spectrum shows the importance of resummed contributions at
next-to-leading logarithmic accuracy in the small and intermediate
transverse-momentum regions and little dependence on unphysical scales and
non-perturbative contributions.