title:
Determining Neutrino Mass Hierarchy by Precision Measurements in
  Electron and Muon Neutrino Disappearance Experiments

abstract:
  Recently a new method for determining the neutrino mass hierarchy by
comparing the effective values of the atmospheric \Delta m^2 measured in the
electron neutrino disappearance channel, \Delta m^2(ee), with the one measured
in the muon neutrino disappearance channel, \Delta m^2(\mu \mu), was proposed.
If \Delta m^2(ee) is larger (smaller) than \Delta m^2(\mu \mu) the hierarchy is
of the normal (inverted) type. We re-examine this proposition in the light of
two very high precision measurements: \Delta m^2(\mu \mu) that may be
accomplished by the phase II of the Tokai-to-Kamioka (T2K) experiment, for
example, and \Delta m^2(ee) that can be envisaged using the novel Mossbauer
enhanced resonant \bar\nu_e absorption technique. Under optimistic assumptions
for the systematic uncertainties of both measurements, we estimate the
parameter region of (\theta_13, \delta) in which the mass hierarchy can be
determined. If \theta_13 is relatively large, sin^2 2\theta_13 \gsim 0.05, and
both of \Delta m^2(ee) and \Delta m^2(\mu \mu) can be measured with the
precision of \sim 0.5 % it is possible to determine the neutrino mass hierarchy
at > 95% CL for 0.3 \pi \lsim \delta \lsim 1.7 \pi for the current best fit
values of all the other oscillation parameters.


title: Lepton Flavor Violation and Supersymmetric Dirac Leptogenesis

abstract:
  Dirac leptogenesis (or Dirac neutrinogenesis), in which neutrinos are purely
Dirac particles, is an interesting alternative to the standard leptogenesis
scenario. In its supersymmetric version, the modified form of the
superpotential required for successful baryogenesis contributes new,
generically non-flavor-diagonal terms to the slepton and sneutrino mass
matrices. In this work, we examine how current experimental bounds on
flavor-changing effects in the lepton sector (and particularly the bound on Mu
-> e Gamma) constrain Dirac leptogenesis and we find that it is capable of
succeeding with superpartner masses as low as 100 GeV. For such light scalars
and electroweakinos, upcoming experiments such as MEG are generically expected
to observe signals of lepton flavor violation.


title:
Comment on papers hep-ph/0603166, hep-ph/0606291, hep-ph/0606310 by S.S.
  Afonin

abstract: This is a Comment to the recent 3 papers by S.S. Afonin


title: Neutrino mass and baryogenesis

abstract:
  A brief overview of the phenomenology related to the seesaw mechanism and the
baryogenesis via leptogenesis is presented.


title: Color superconductivity in a strong external magnetic field

abstract:
  We explore the effects of an applied strong external magnetic field in a
three flavor massless color superconductor. The long-range component of the B
field that penetrates the superconductor enhances some quark condensates,
leading to a different condensation pattern. The external field also reduces
the flavor symmetries in the system, and thus it changes drastically the
corresponding low energy physics. Our considerations are relevant for the study
of highly magnetized compact stars.


title: Analysis of the $B \to K^*_{2} (\to K \pi) l^+ l^-$ decay

abstract:
  In this paper we study the angular distribution of the rare B decay $B \to
K^*_2 (\to K \pi) l^+ l^-$, which is expected to be observed soon. We use the
standard effective Hamiltonian approach, and use the form factors that have
already been estimated for the corresponding radiative decay $B \to K^*_2
\gamma$. The additional form factors that come into play for the dileptonic
channel are estimated using the large energy effective theory (LEET), which
enables one to relate the additional form factors to the form factors for the
radiative mode. Our results provide, just like in the case of the $K^*(892)$
resonance, an opportunity for a straightforward comparison of the basic theory
with experimental results which may be expected in the near future for this
channel.


title: Variational Study of Weakly Coupled Triply Heavy Baryons

abstract:
  Baryons made of three heavy quarks become weakly coupled, when all the quarks
are sufficiently heavy such that the typical momentum transfer is much larger
than Lambda_QCD. We use variational method to estimate masses of the
lowest-lying bcc, ccc, bbb and bbc states by assuming they are Coulomb bound
states. Our predictions for these states are systematically lower than those
made long ago by Bjorken.


title: Fermion masses in the economical 3-3-1 model

abstract:
  We show that, in frameworks of the economical 3-3-1 model, all fermions get
masses. At the tree level, one up-quark and two down-quarks are massless, but
the one-loop corrections give all quarks the consistent masses. This conclusion
is in contradiction to the previous analysis in which, the third scalar triplet
has been introduced. This result is based on the key properties of the model:
First, there are three quite different scales of vacuum expectation values:
$\om \sim {\cal O}(1) \mathrm{TeV}, v \approx 246 \mathrm{GeV}$ and $ u \sim
{\cal O}(1) \mathrm{GeV}$. Second, there exist two types of Yukawa couplings
with different strengths: the lepton-number conserving couplings $h$'s and the
lepton-number violating ones $s$'s satisfying the condition in which the second
are much smaller than the first ones: $ s \ll h$.
  With the acceptable set of parameters, numerical evaluation shows that in
this model, masses of the exotic quarks also have different scales, namely, the
$U$ exotic quark ($q_U = 2/3$) gains mass $m_U \approx 700 $ GeV, while the
$D_\al$ exotic quarks ($q_{D_\al} = -1/3$) have masses in the TeV scale:
$m_{D_\al} \in 10 \div 80$ TeV.


title: Looking for defects in the 2PI correlator

abstract:
  Truncations of the 2PI effective action are seen as a promising way of
studying non-equilibrium dynamics in quantum field theories. We probe their
applicability in the non-perturbative setting of topological defect formation
in a symmetry-breaking phase transition, by comparing full classical lattice
field simulations and the 2PI formulation for classical fields in an O($N$)
symmetric scalar field theory. At next-to-leading order in 1/N, the 2PI
formalism fails to reproduce any signals of defects in the two-point function.
This suggests that one should be careful when applying the 2PI formalism for
symmetry breaking phase transitions.


title: Dynamically induced scalar quark confinement

abstract:
  We employ a functional approach to investigate the confinement problem in
quenched Landau gauge QCD. We demonstrate analytically that a linear rising
potential between massive quarks is generated by infrared singularities in the
dressed quark-gluon vertex. The selfconsistent mechanism that generates these
singularities is driven by the scalar Dirac amplitudes of the full vertex and
the quark propagator. These can only be present when chiral symmetry is broken.
We have thus uncovered a novel mechanism that directly links chiral symmetry
breaking with confinement.


title: Neutrino reconstruction with topological information

abstract:
  In general a decay with a missing (not detected) particle can not be fully
reconstructed apart from a few exceptions. For example, if the momentum of the
decaying particle is known or if the missing energy in an event is measured
precisely, then the missing particle 4-momentum can be determined. Here a new
method is proposed that utilizes additional information about the topology of a
decay: The direction from the primary to the secondary vertex combined with
momentum conservation allows the determination of the missing particle momentum
up to a twofold ambiguity. The semileptonic decay of the Bs mesons is
considered as an example to illustrate this method and to compare its
performance against conventional approaches.


title: Jet Shapes in Opaque Media

abstract:
  We present general arguments, based on medium-induced radiative energy loss,
which reproduce the non-gaussian shapes of away-side di-jet azimuthal
correlations found in nucleus-nucleus collisions at RHIC. A rather simple
generalization of the Sudakov form factors to opaque media allowing an
effective description of the experimental data is proposed.


title: Event Generation from Effective Field Theory

abstract:
  A procedure is developed for using Soft Collinear Effective Theory (SCET) to
generate fully exclusive events, which can then be compared to data from
collider experiments. We show that SCET smoothly interpolates between QCD for
hard emissions, and the parton shower for soft emissions, while resumming all
large logarithms. In SCET, logarithms are resummed using the renormalization
group, instead of classical Sudakov factors, so subleading logarithms can be
resummed as well. In addition, all loop effects of QCD can be reproduced in
SCET, which allows the effective theory to incorporate next-to-leading and
higher-order effects. We also show through SCET that in the soft/collinear
limit, successive branchings factorize, a fact which is essential to parton
showers, and that the splitting functions of QCD are reproduced. Finally,
combining these results, we present a example of an algorithm that incorporates
the SCET results into an event generator which is systematically improvable.


title: Black Holes at Future Colliders and Beyond: a Topical Review

abstract:
  One of the most dramatic consequences of low-scale (~1 TeV) quantum gravity
in models with large or warped extra dimension(s) is copious production of mini
black holes at future colliders and in ultra-high-energy cosmic ray collisions.
Hawking radiation of these black holes is expected to be constrained mainly to
our three-dimensional world and results in rich phenomenology. In this topical
review we discuss the current status of astrophysical observations of black
holes and selected aspects of mini black hole phenomenology, such as production
at colliders and in cosmic rays, black hole decay properties, Hawking radiation
as a sensitive probe of the dimensionality of extra space, as well as an
exciting possibility of finding new physics in the decays of black holes.


title:
Phenomenology of the triplet seesaw mechanism with Gauge and Yukawa
  mediation of SUSY breaking

abstract:
  We thoroughly discuss a new supersymmetric grand unified scenario of the
triplet seesaw mechanism where the exchange of heavy SU(2)_W triplet states
generates both neutrino masses and soft supersymmetry breaking terms. This
framework, recently proposed by us in a previous work, is highly predictive
since it contains only three free parameters connecting low-energy neutrino
parameters, lepton and quark flavour violation, sparticle and Higgs boson
spectra and electroweak symmetry breakdown. These three parameters are the
triplet mass M_T, the effective supersymmetry breaking scale B_T and a coupling
constant lambda. We perform a complete analysis of the parameter space taking
into account the present experimental constraints and considering different
types of neutrino spectrum. A special emphasis is given to the particular
features of the sparticle and Higgs spectra and to the model independent
predictions obtained for the processes mu-> e X, mu-> e conversion in nuclei,
tau-> e Y and tau-> mu Y (X = gamma, e e, Y= gamma, e e, mu mu). In the
appendices, we present some technical aspects relevant for our analysis.


title: Collisional jet quenching becomes probable

abstract:
  It was argued recently that loop corrections to tree-level amplitudes are
essential in the discussion of the collisional energy loss of energetic partons
in the hot quark gluon plasma: Instead of $dE_{\rm coll}^B/dx \sim \alpha^2 T^2
\ln(ET/m_D^2)$, as first derived by Bjorken (assuming a constant $\alpha$), the
mean energy loss actually behaves as $dE_{\rm coll}/dx \sim \alpha(m_D^2)T^2$.
Here we calculate, within this resummation-improved framework, the probability
distribution functions (`quenching weights') of the collisional energy loss.
First results from a Monte Carlo implementation of this probabilistic
collisional quenching shed new light on the interpretation of jet suppression
in heavy ion collisions.


title:
Evaluating Two-Loop massive Operator Matrix Elements with Mellin-Barnes
  Integrals

abstract:
  We calculate massive 5-propagator 2-loop integrals for operator matrix
elements in the light-cone expansion, using Mellin-Barnes techniques and
representations through generalized hypergeometric functions.


title: LSP as a Candidate for Dark Matter

abstract:
  The most recent observations by the WMAP satellite provided us with data of
unprecedented accuracy regarding the parameters describing the Standard
Cosmological Model. The current matter-energy density of the Universe is close
to its critical value of which 73% is attributed to Dark Energy, 23% to Cold
Dark Matter and only 4% is ordinary matter of baryonic nature. The origins of
the Dark Energy (DE) and Dark Matter (DM) constitute the biggest challenge of
Modern Astroparticle Physics. Particle theories, which will be tested in the
next round experiments in large accelerators, such as the LHC, provide
candidates for DM while at the same time can be consistent with the DE
component. We give a pedagogical account on the DM problem and the possibility
that this has supersymmetric origin.


title: Tri-bimaximal Neutrino Mixing and Flavor-dependent Resonant Leptogenesis

abstract:
  We propose a particularly economical neutrino mass model, in which there are
only two right-handed Majorana neutrinos of ${\cal O}(1)$ TeV and their masses
are highly degenerate. Its novel Yukawa-coupling texture together with the
seesaw mechanism allows us to achieve the normal neutrino mass hierarchy with
$m^{}_1 = 0$ and a nearly tri-bimaximal neutrino mixing pattern with the
maximal CP-violating phase: $\theta^{}_{23} = \pi/4$, $|\delta| = \pi/2$ and
$\sin^2 \theta^{}_{12} = (1 - 2 \tan^2 \theta^{}_{13})/3$. One may also obtain
the inverted neutrino mass hierarchy with $m^{}_3 = 0$ and the corresponding
neutrino mixing pattern with $\theta^{}_{23} =\pi/4$ and $\theta^{}_{13} =
\delta = 0$. In both cases, it is possible to interpret the cosmological baryon
number asymmetry $\eta^{}_{\rm B} \approx 6.1 \times 10^{-10}$ through the
resonant leptogenesis mechanism. We demonstrate the significance of
flavor-dependent effects in this leptogenesis scenario: they can either flip
the sign of the flavor-independent prediction for $\eta^{}_{\rm B}$ in the
$m^{}_1 = 0$ case or magnify the magnitude of the flavor-independent prediction
for $\eta^{}_{\rm B}$ about 50 times in the $m^{}_3 = 0$ case.


title: Soft SUSY breaking contributions to proton decay

abstract:
  We show that in supersymmetric grand unified theories new effective D=4 and
D=5 operators for proton decay are induced by soft SUSY-breaking terms, when
heavy GUT gauge bosons are integrated out, in addition to the standard D=6
ones. As a result, the proton lifetime in gauge mediated channels can be
enhanced or even suppressed depending on the size of the heavy Higgses soft
terms.


title: Toward the Understanding of Quark Matter Formation

abstract:
  We present the evidence that crossover, fluctuation phenomena and possible
Anderson transition are the precursors of quark matter formation.


title:
Next-to-leading order vs. quark off-shellness and intrinsic k_T in the
  Drell-Yan process

abstract:
  We calculate the effects of next-to-leading order perturbative QCD as well as
of the quark transverse motion and off-shellness on the Drell-Yan process cross
section. By studying the s->infinity behaviour of the cross section in these
approaches, we find that the effects of quark off-shellness and intrinsic-k_T
parametrize those of higher twists. In particular, the off-shellness of partons
generates part of the K-factor type corrections to the leading order cross
section. Higher twist contributions to the p_T-spectrum of the Drell-Yan pairs
are found to be large for presently accessible energies. The evolution of quark
off-shellness distribution with the hard scale is also studied.


title: Charmed-Hadron Fragmentation Functions from CERN LEP1 Revisited

abstract:
  In Phys. Rev. D 58, 014014 (1998) and 71, 094013 (2005), we determined
non-perturbative D^0, D^+, D^{*+}, D_s^+, and Lambda_c^+ fragmentation
functions, both at leading and next-to-leading order in the MS-bar
factorization scheme, by fitting e^+e^- data taken by the OPAL Collaboration at
CERN LEP1. The starting points for the evolution in the factorization scale mu
were taken to be mu_0 = 2m_Q, where Q = c,b. For the reader's convenience, in
this Addendum, we repeat this analysis for mu_0 = m_Q, where the flavor
thresholds of modern sets of parton density functions are located.


title:
Unitarity cutting rules for the nucleus excitation and topological cross
  sections in hard production off nuclei from nonlinear k_t-factorization

abstract:
  At the partonic level, a typical final state in small-x deep inelastic
scattering off nuclei and hard proton-nucleus collisions can be characterized
by the multiplicity of color-excited nucleons. Within reggeon field theory,
each color-excited nucleon is associated with the unitarity cut of the pomeron
exchanged between the projectile and nucleus. In this communication we derive
the unitarity rules for the multiplicity of excited nucleons, alias cut
pomerons, alias topological cross sections, for typical hard dijet production
processes. We demonstrate how the coupled-channel non-Abelian intranuclear
evolution of color dipoles, inherent to pQCD, gives rise to the reggeon field
theory diagrams for final states in terms of the uncut, and two kinds of cut,
pomerons. Upon the proper identification of the uncut and cut pomeron
exchanges, the topological cross sections for dijet production follow in a
straightforward way from the earlier derived nonlinear k_t - factorization
quadratures for the inclusive dijet cross sections. The concept of a coherent
(collective) nuclear glue proves extremely useful for the formulation of
reggeon field theory vertices of multipomeron - cut and uncut - couplings to
particles and between themselves. A departure of our unitarity cutting rules
from the ones suggested by the pre-QCD Abramovsky-Kancheli-Gribov rules, stems
from the coupled-channel features of intranuclear pQCD. We propose a
multiplicity re-summation as a tool for the isolation of topological cross
sections for single-jet production.


title:
SM and MSSM Higgs Boson Production Cross Sections at the Tevatron and
  the LHC

abstract:
  We present results for the SM and MSSM Higgs-boson production cross sections
at the Tevatron and the LHC. The SM cross sections are a compilation of the
state-of-the-art theoretical predictions. The MSSM cross sections are obtained
from the SM ones by means of an effective coupling approximation, as
implemented in FeynHiggs. Numerical results have been obtained in four
benchmark scenarios for two values of tan beta, tan beta = 5, 40.


title:
The Two-loop Soft Anomalous Dimension Matrix and Resummation at
  Next-to-next-to Leading Pole

abstract:
  We extend the resummation of dimensionally-regulated amplitudes to
next-to-next-to-leading poles. This requires the calculation of two-loop
anomalous dimension matrices for color mixing through soft gluon exchange.
Remarkably, we find that they are proportional to the corresponding one-loop
matrices. Using the color generator notation, we reproduce the two-loop
single-pole quantities H^(2) introduced by Catani for quark and gluon elastic
scattering. Our results also make possible threshold and a variety of other
resummations at next-to-next-to leading logarithm. All of these considerations
apply to 2 to n processes with massless external lines.


title:
SU(3) and CP violating weak and strong final state phases for B_{d}^{0}
  and B_{s}^{0} decays

abstract:
  Using rotation in SU(3) space, a set of relations between various decay modes
of B_{d} and B_{s} are derived. The decays bar{B}_{d}^{0}-> K^{*-}pi ^{+}(rho
^{+}K^{-}), bar{B}_{s}^{0}-> K^{*-}K^{+} are expressed in terms of decay
parameters of bar{B}_{d}^{0}->rho ^{-}pi ^{+}(rho ^{+}\pi ^{-}). In particular
the parameters r_{-+}(r_{+-}) of B_{d}->rho \pi decays are obtained in terms of
experimentally known decay rates R_{-+}(R_{+-})=frac{1}{2}left(Gamma_{rho
^{+}pi ^{-}(rho ^{-}pi ^{+})}+\ar{\amma}_{\ho ^{-}pi ^{+}(rho ^{+}pi ^{-})}), $
R_{-+}^{prime}(R_{+-}^{prime})=frac{1}{2}left(Gamma_{K^{*+}pi ^{-}(rho
^{-}K^{+})}+bar{Gamma}_{K^{*-}\pi ^{+}(rho ^{+}K^{-})}), known parameters
bar{lambda}, f_{K^{*}}/f_{rho}(f_{K}/f_{pi}) and two parameters
B_{-+}=frac{R_{-+}}{left| T^{-+}right| ^{2}},B_{+-}=frac{R_{+-}}{| T^{+-}|
^{2}} which are determined by using factorization for tree amplitudes T^{-+}
and T^{+-}. We find r_{-+}=0.21pm 0.04,r_{+-}=0.25pm 0.06. With these values
the following bounds on left(z\equiv \cos \gamma \cos \delta, x=\sin \gamma sin
\delta) are derived: [-0.34(-0.33)\leq z_{-+}(z_{+-})\leq 0.28(0.27) ] and
[0.16(0.43)\leq x_{-+}(x_{+-})\leq 0.58(1.00) ]
  From (x,z) plot we obtain following bounds on weak phase gamma and strong
phases \delta ^{prime}s z_{-+}>0,gamma geq 70^{circ},10^{circ} leq \delta
_{-+}\leq 40^{circ}, z_{-+}<0,gamma geq 65^{\circ},$ $(180-\delta_{-+})$. For
$\delta_{+-}$ we get $25^{\circ}leq \delta_{+-}\leq 90^{circ} or
(180-delta_{+-}).


title:
Phenomenology of non-universal gaugino masses and implications for the
  Higgs boson decay

abstract:
  Grand unified theories (GUTs) can lead to non-universal gaugino masses at the
unification scale. We study the implications of such non-universal gaugino
masses for the composition of the lightest neutralino in supersymmetric (SUSY)
theories based on SU(5) gauge group. We also consider the phenomenological
implications of non-universal gaugino masses for the phenomenology of Higgs
bosons in the context of Large Hadron Collider.


title: Spin-charge separation for the SU(3) gauge theory

abstract:
  The idea of a spin-charge separation of the SU(2) gauge potential is extended
to the SU(3) case. It is shown that in this case there exist different
non-perturbative ground states characterized by different gauge condensate
$A^B_\mu A^B_\mu \neq 0$.


title:
Constraint of B_{d,s}-bar{B}_{d,s} mixing on warped extra-dimension
  model

abstract:
  Recent CDF measurement of the Bs-Bs oscillation frequency, at the Tevatron
imposes significant constraint on various models for new physics. A warped
extra-dimension model with custodial isospin symmetry accommodates the Bd-Bd
mixing at tree level mainly through the Kaluza-Klein gluons. This is due to the
misalignment between the bulk gauge eigenstates and the localized Yukawa
eigenstates of the bulk fermions. We adopt the universal 5D Yukawa coupling
model where all Yukawa couplings are of order one. The SM fermion mass spectra
and mixings are controlled by the bulk Dirac mass parameters. With two versions
of the hadronic parameter values, we investigate the implication of the
observed BB mixings on this model. The CP-violating effects on the Bd system is
shown to provide very strong constraint: The first Kaluza-Klein mass of a gluon
has its lower bound about 3.7 TeV with 1 sigma uncertainty.


title: Effective fermion couplings in warped 5D Higgsless theories

abstract:
  We consider a five dimensional SU(2) gauge theory with fermions in the bulk
and with additional SU(2) and U(1) kinetic terms on the branes. The electroweak
breaking is obtained by boundary conditions. After deconstruction, fermions in
the bulk are eliminated by using their equations of motion. In this way
Standard Model fermion mass terms and direct couplings to the internal gauge
bosons of the moose are generated. The presence of these new couplings gives a
new contribution to the epsilon_3 parameter in addition to the gauge boson
term. This allows the possibility of a cancellation between the two
contributions, which can be local (site by site) or global. Going back to the
continuum, we show that the implementation of local cancellation in any generic
warped metric leaves massless fermions. This is due to the presence of one
horizon on the infrared brane. However we can require a global cancellation of
the new physics contributions to the epsilon_3 parameter. This fixes relations
among the warp factor and the parameters of the fermion and gauge sectors.


title: An SU(2) KvBLL caloron gas model and confinement

abstract:
  A semi-classical model is developed to describe pure SU(2) Yang-Mills
gluodynamics at finite temperature as a dilute, non-interacting gas of
Kraan-van Baal-Lee-Lu calorons including the case of non-trivial holonomy.
Temperature dependent parameters of the model (asymptotic caloron holonomy,
caloron density and caloron size distribution) are discussed from the point of
view of lattice observations and of in-medium modifications of the one-loop
caloron amplitude. Space-like string tensions running into plateaux at
distances R \approx 0.8 - 1.3 fm are obtained and compared to lattice results
in order to find more precisely the average caloron size. Then, the
quark-antiquark free energy as predicted by the model is considered. In the
confined phase a linear rise with the separation can be observed up to R
\approx 4 fm, whereas it runs into plateaux above T_c. Screening effects in the
adjoint potentials are observed together with an approximate Casimir scaling of
the caloron contribution to the fundamental and adjoint forces. In Abelian
projection, space-like percolation of monopoles is found in the confined phase
only. Thus, taking the non-trivial holonomy into account, confinement
properties of pure SU(2) Yang-Mills gluodynamics can be described by a
semi-classical approach up to distances one order of magnitude larger than the
caloron size.


title:
Magnetic dipole operator contributions to the photon energy spectrum in
  anti-B -> X(s) gamma at O(alpha(s)^2)

abstract:
  We compute the O(\alpha_s^2) contributions to the photon energy spectrum of
the inclusive decay \bar{B} -> X_s \gamma associated with the magnetic penguin
operator O_7. They are an essential part of the ongoing NNLO calculation of
this important decay. We use two different methods to evaluate the master
integrals, one based on the differential equation approach and the other on
sector decomposition, leading to identical results which in turn agree with
those of a recent independent calculation by Melnikov and Mitov. We study the
numerical relevance of this set of NNLO contributions in the photon energy
spectrum and discuss the change of bottom quark mass scheme.


title: Status of Neutrino Masses and Mixing and Future Perspectives

abstract:
  Status of the problem of neutrino masses, mixing and oscillations is
discussed. Future perspectives are briefly considered.


title:
Constraints on Light Dark Matter and U bosons, from psi, Upsilon, K+,
  pi0, eta and eta' decays

abstract:
  Following searches for photinos and very light gravitinos in invisible decays
of psi and Upsilon, we discuss new limits on Light Dark Matter and U bosons,
from psi and Upsilon decays, as well as rare decays of K+ and invisible decays
of pi0, eta and eta' ... . The new limits involving the vector couplings of the
U to quarks turn out, not surprisingly, to be much less restrictive than
existing ones on axial couplings, from an axionlike behavior of a light U
boson, tested in psi --> gamma U, Upsilon --> gamma U and K+ --> pi+ U decays
(or as compared to the limit from parity-violation in atomic physics, in the
presence of an axial coupling to the electron). Altogether the hypothesis of
light U bosons, and light dark matter particles, remains compatible with
particle physics constraints, while allowing for the appropriate annihilation
cross sections required, both at freeze-out (for the relic abundance) and
nowadays (if e+ from LDM annihilations are at the origin of the 511 keV line
from the galactic bulge).


title: Semileptonic B decays into even parity charmed mesons

abstract:
  By using a constituent quark model we compute the form factors relevant to
semileptonic transitions of B mesons into low-lying p-wave charmed mesons. We
evaluate the q^2 dependence of these form factors and compare them with other
model calculations. The Isgur-Wise functions tau(1/2) and tau(3/2) are also
obtained in the heavy quark limit of our results.


title: CPT and Quantum Mechanics Tests with Kaons: Theory

abstract:
  In this talk I review theoretical motivations for possible CPT Violation and
deviations from ordinary quantum mechanical behavior of field theoretic systems
in some quantum gravity models, and I describe the relevant precision tests
using neutral and charged Kaons. I emphasize the possibly unique role of
neutral-meson factories in providing specific tests of models in which the CPT
operator is not well-defined, leading to modifications of
Einstein-Podolsky-Rosen (EPR) particle correlators.


title: Lorentz Violating Julia-Toulouse Mechanism

abstract:
  We propose a new Lorentz invariant violating extension for the pure photonic
sector of the Standard Model due to the condensation of topological defects in
the context of the Julia-Toulouse mechanism. Possible physical consequences
leading to direct measurable effects over the confining properties of the
elementary particles are explored.


title: CPT and Quantum Mechanics Tests with Kaons

abstract:
  In this review we first discuss the theoretical motivations for possible CPT
violation and deviations from ordinary quantum-mechanical behavior of
field-theoretic systems in the context of an extended class of quantum-gravity
models. Then we proceed to a description of precision tests of CPT symmetry
using mainly neutral kaons. We emphasize the possibly unique role of neutral
meson factories in providing specific tests of models where the
quantum-mechanical CPT operator is not well-defined, leading to modifications
of Einstein-Podolsky-Rosen particle correlators. Finally, we present tests of
CPT, T, and CP using charged kaons, and in particular K_l4 decays, which are
interesting due to the high statistics attainable in experiments.


title: Electroweak Physics at LHC

abstract:
  The prospects for electroweak physics at the LHC are reviewed focusing mainly
on precision studies. This includes projections for measurements of the
effective Z pole weak mixing angle, of top quark, W boson, and Higgs scalar
properties, and new physics searches.


title:
Determination of the Atmospheric Neutrino Fluxes from Atmospheric
  Neutrino Data

abstract:
  The precise knowledge of the atmospheric neutrino fluxes is a key ingredient
in the interpretation of the results from any atmospheric neutrino experiment.
In the standard atmospheric neutrino data analysis, these fluxes are
theoretical inputs obtained from sophisticated numerical calculations based on
the convolution of the primary cosmic ray spectrum with the expected yield of
neutrinos per incident cosmic ray. In this work we present an alternative
approach to the determination of the atmospheric neutrino fluxes based on the
direct extraction from the experimental data on neutrino event rates. The
extraction is achieved by means of a combination of artificial neural networks
as interpolants and Monte Carlo methods for faithful error estimation


title: The phi->K0K0gamma decay

abstract:
  The scalar contributions to the radiative decay $\phi\to K^0\bar K^0\gamma$
are studied within the framework of the Linear Sigma Model. Theoretical
predictions for the associated subprocesses $\phi\to f_0\gamma$ and $\phi\to
a_0\gamma$ as well as the ratio $\phi\to f_0\gamma/a_0\gamma$ are also given.


title:
Quantum corrections to the masses of the octet and decuplet baryons in
  the SU(3) chiral quark soliton model

abstract:
  Mesonic fluctuations around the chiral solitons are investigated in the SU(3)
chiral quark soliton model. Since the soliton takes the non-hedgehog shape for
the hyperons and the hedgehog one for the non-hedgehog baryons in our approach,
the fluctuations also change according to the baryonic state. The quantum
corrections to the masses (the Casimir energies) are estimated for the octet
and decuplet baryons. The lack of the confinement in this model demands the
cutoff on the energy of the fluctuations. Under the assumption that the value
of the cutoff energy is $2\times$(the lightest constituent quark mass), these
calculation reproduces the masses of the baryons within 15 % error.


title: Momentum Broadening in an Anisotropic Plasma

abstract:
  The rates governing momentum broadening in a quark-gluon plasma with a
momentum anisotropy are calculated to leading-log order for a heavy quark using
kinetic theory. It is shown how the problematic singularity for these rates at
leading-oder is lifted by next-to-leading order gluon self-energy corrections
to give a finite contribution to the leading-log result. The resulting rates
are shown to lead to larger momentum broadening along the beam axis than in the
transverse plane, which is consistent with recent STAR results. This might
indicate that the quark-gluon-plasma at RHIC is not in equilibrium.


title: Electromagnetic Radiation From An Equilibrium Quark -Gluon Plasma System

abstract:
  We study the electromagnetic radiation from a hot and slightly strong
interacting fireball system of quark-gluon plasma using the Boltzmann
distribution function for the incoming particles and Bose-Einstein distribution
for gluon in first calculation of electromagnetic radiation and Fermi-Dirac
distribution for quark, antiquark and Boltzmann distribution for gluon in our
second calculation. The thermal photon emission rate is found that it is
infrared divergent for massless quarks which are discussed by many authors and
regulate this divergence using different cut-off in the qurak mass. However we
remove this divergence using the same technique of Braaten and Pisarski in the
thermal mass of the system by using our model calculation in the coupling
parameter. Thus the production rate of the thermal photon is found to be
smoothly worked by this cut-off technique of our model. The result is found to
be matched with the most of the theoretical calculations and it is in the
conformity with the experimental results of $200 AGeV$ S+Au collision of LHC.


title: Various definitions of Minimal Flavour Violation for Leptons

abstract:
  Neutrino masses imply the violation of lepton flavour and new physics beyond
the Standard Model. However, flavour change has only been observed in
oscillations. In analogy with the quark sector, we could deduce the existence
of a principle of Minimal Flavour Violation also for Leptons. Such an extension
is not straightforward, since the mechanisms generating neutrino masses are
unknown and many scenarios can be envisaged. Thus, we explore some possible
definitions of MFVL and propose a notion that can include many models. We build
an R-parity violating neutrino mass model in agreement with our preferred
definition of MFVL, and show that flavour violating processes are not
neccessarily controlled by the MNS mixing matrix.


title: Flavor effects on leptogenesis predictions

abstract:
  Flavor effects in leptogenesis reduce the region of the see-saw parameter
space where the final predictions do not depend on the initial conditions, the
strong wash-out regime. In this case we show that the lowest bounds holding on
the lightest right-handed (RH) neutrino mass and on the reheating temperature
for hierarchical heavy neutrinos, do not get relaxed compared to the usual ones
in the one-flavor approximation, M_1 (T_reh) \gtrsim 3 (1.5) x 10^9 GeV. Flavor
effects can however relax down to these minimal values the lower bounds holding
for fixed large values of the decay parameter K_1. We discuss a relevant
definite example showing that, when the known information on the neutrino
mixing matrix is employed, the lower bounds for K_1 \gg 10, are relaxed by a
factor 2-3 for light hierarchical neutrinos, without any dependence on
\theta_13 and on possible phases. On the other hand, going beyond the limit of
light hierarchical neutrinos and taking into account Majorana phases, the lower
bounds can be relaxed by one order of magnitude. Therefore, Majorana phases can
play an important role in leptogenesis when flavor effects are included.


title:
Solving cosmological problem in universal extra dimension models by
  introducing Dirac neutrino

abstract:
  Universal extra dimension (UED) models with right-handed neutrinos are
studied. The introduction of the neutrinos makes us possible not only to
describe Dirac neutrino masses but also to solve the cosmological problem
called the KK graviton problem. This problem is essentially caused by the late
time decay of a KK photon into a KK graviton and a photon, and it distorts the
spectrum of the cosmic microwave background or the diffuse photon. We point out
that, once we introduce right-handed neutrinos to UED models, the KK photon
decays dominantly into neutrinos and does not emit a photon. We also discuss
sub-dominant modes with a photon in the decay quantitatively, and show that
their branching ratios are so small that the spectra are not distorted.


title: Supersymmetry without a Light Higgs Boson

abstract:
  Motivated by the absence, so far, of any direct signal of conventional
low-energy supersymmetry, we explore the consequences of making the lightest
Higgs boson in supersymmetry relatively heavy, up to about 300 GeV, in the most
straightforward way, i.e. via the introduction of a chiral singlet S with a
superpotential interaction with the Higgs doublets, \lambda S H_1 H_2. The
coupling \lambda dominates over all the other couplings and, to maintain the
successful perturbative analysis of the ElectroWeak Precision Tests, is only
restricted to remain perturbative up to about 10 TeV. The general features of
this "\lambda SUSY" framework, which deviates significantly from the MSSM or
the standard NMSSM, are analyzed in different areas: ElectroWeak Precision
Tests, Dark Matter, naturalness bounds on superparticle masses, and LHC
signals. There is a rich Higgs/Higgsino sector in the (200-700)GeV mass region,
which may include LSP Higgsino dark matter. All other superpartners, apart from
the top squarks, may naturally be heavier than 1-2 TeV. This picture can be
made consistent with gauge coupling unification.


title:
Dimension-six top-Higgs interaction and its effect in collider
  phenomenology

abstract:
  Measurement of the Yukawa interaction between the top quark and the Higgs
boson should be useful to clarify the mechanism of fermion mass generation.
  We discuss the impact of non-standard interactions characterized by
dimension-six operators on the effective top Yukawa coupling.
  The cross section of the process $e^-e^+ \to W^-W^+ \nu \bar \nu \to t \bar t
\nu \bar \nu$ is calculated including these operators, and possible deviation
from the standard model prediction is evaluated under the constraint from
perturbative unitarity and current experimental data.
  We find that if the new physics scale is in a TeV region, the cross section
can be significantly enhanced due to the non-standard interactions.
  Such a large effect should be detectable at the International Linear
Collider.


title: Geometry of Majorana neutrino and new symmetries

abstract:
  Experimental observation of Majorana fermion matter gives a new impetus to
the understanding of the Lorentz symmetry and its extension, the geometrical
properties of the ambient space-time structure, matter--antimatter symmetry and
some new ways to understand the baryo-genesis problem in cosmology. Based on
the primordial Majorana fermion matter assumption, we discuss a possibility to
solve the baryo-genesis problem through the the Majorana-Diraco genesis in
which we have a chance to understand creation of Q(em) charge and its
conservation in our D=1+3 Universe after the Big Bang. In the Majorana-Diraco
genesis approach there appears a possibility to check the proton and electron
non-stability on the very low energy scale. In particle physics and in our
space-time geometry, the Majorana nature of the neutrino can be related to new
types of symmetries which are lying beyond the binary Cartan-Killing-Lie
algebras/superalgebras. This can just support a conjecture about the
non-completeness of the SM in terms of binary Cartan--Killing--Lie
symmetries/supersymmetries. As one of the very important applications of such
new ternary symmetries could be related with explanation of the nature of the
three families and three colour symmetry. The Majorana neutrino can directly
indicate the existence of a new extra-dimensional geometry and thanks to new
ternary space-time symmetries, could lead at high energies to the
unextraordinary phenomenological consequences.


title:
Real Invariant Matrices and Flavour-Symmetric Mixing Variables with
  Emphasis on Neutrino Oscillations

abstract:
  In fermion mixing phenomenology, the matrix of moduli squared, P=(|U|^2), is
well-known to carry essentially the same information as the complex mixing
matrix U itself, but with the advantage of being phase-convention independent.
The matrix K (analogous to the Jarlskog CP-invariant J) formed from the real
parts of the mixing matrix "plaquette" products is similarly invariant. In this
paper, the P and K matrices are shown to be entirely equivalent, both being
directly related (in the leptonic case) to the observable, locally L/E-averaged
transition probabilities in neutrino oscillations. We study an (over-)complete
set of flavour-symmetric Jarlskog-invariant functions of mass-matrix
commutators, rewriting them simply as moment-transforms of such (real)
invariant matrices.


title:
Maximally Symmetric Minimal Unification Model SO(32) with Three Families
  in Ten Dimensional Space-time

abstract:
  Based on a maximally symmetric minimal unification hypothesis and a quantum
charge-dimension correspondence principle, it is demonstrated that each family
of quarks and leptons belongs to the Majorana-Weyl spinor representation of
14-dimensions that relate to quantum spin-isospin-color charges. Families of
quarks and leptons attribute to a spinor structure of extra 6-dimensions that
relate to quantum family charges. Of particular, it is shown that 10-dimensions
relating to quantum spin-family charges form a motional 10-dimensional quantum
space-time with a generalized Lorentz symmetry SO(1,9), and 10-dimensions
relating to quantum isospin-color charges become a motionless 10-dimensional
quantum intrinsic space. Its corresponding 32-component fermions in the spinor
representation possess a maximal gauge symmetry SO(32). As a consequence, a
maximally symmetric minimal unification model SO(32) containing three families
in ten dimensional quantum space-time is naturally obtained by choosing a
suitable Majorana-Weyl spinor structure into which quarks and leptons are
directly embedded. Both resulting symmetry and dimensions coincide with the
ones of type I string and heterotic string SO(32) in string theory.


title: Glue drops inside hadrons

abstract:
  We present experimental evidences for the existence of a semi-hard scale in
light hadrons. This includes the suppression of gluon radiation that is seen in
high mass hadron diffraction; the weak energy dependence of hadronic total
cross sections; the small value of the Pomeron trajectory slope measured in
photoproduction of J/Psi; the weakness of gluon shadowing in nuclei; shortage
of gluons in the proton revealed by an unusual behavior of the proton structure
function in the soft limit, and the enhanced intrinsic transverse momentum of
quarks and gluons, which considerably exceeds the inverse hadronic size. All
these observations suggest that gluons in hadrons are located within spots of a
small size relative to the confinement radius.


title:
Chiral Lagrangian at finite temperature from the Polyakov-Chiral Quark
  Model

abstract:
  We analyze the consequences of the inclusion of the gluonic Polyakov loop in
chiral quark models at finite temperature. Specifically, the low-energy
effective chiral Lagrangian from two such quark models is computed. The tree
level vacuum energy density, quark condensate, pion decay constant and
Gasser-Leutwyler coefficients are found to acquire a temperature dependence.
This dependence is, however, exponentially small for temperatures below the
mass gap in the full unquenched calculation. The introduction of the Polyakov
loop and its quantum fluctuations is essential to achieve this result and also
the correct large $N_c$ counting for the thermal corrections. We find that new
coefficients are introduced at ${\cal O}(p^4)$ to account for the Lorentz
breaking at finite temperature. As a byproduct, we obtain the effective
Lagrangian which describes the coupling of the Polyakov loop to the Goldstone
bosons.


title: The $\alpha$ particle as a canonically quantized multiskyrmion

abstract:
  The rational map approximation to the solution to the SU(2) Skyrme model with
baryon number B=4 is canonically quantized. The quantization procedure leads to
anomalous breaking of the chiral symmetry, and exponential falloff of the
energy density of the soliton at large distances. The model is extended to
SU(2) representations of arbitrary dimension. These soliton solutions capture
the double node feature of the empirical $\alpha$ particle charge form factor,
but as expected lead to a too compact matter distribution. Comparison to
phenomenology indicates a preference for the fundamental representation.


title:
Duality, analyticity and t dependence of generalized parton
  distributions

abstract:
  Basing upon dual analytic models, we present arguments in favor of the
parametrization of generalized parton distributions (GPD) in the form
(x/g_0)^{(1-x)\tilde\alpha(t)}, where \tilde\alpha(t)=\alpha(t)-\alpha(0) is
the nonlinear part of the Regge trajectory and g_0 is a parameter, g_0>1. For
linear trajectories it reduces to earlier proposals. We compare the calculated
moments of these GPD with the experimental data on form factors and find that
the effects from the nonlinearity of Regge trajectories are large. By
Fourier-transforming the obtained GPD, we access the spatial distribution of
protons in the transverse plane. The relation between dual amplitudes with
Mandelstam analyticity and composite models in the infinite momentum frame is
discussed, the integration variable in dual models being associated with the
quark longitudinal momentum fraction x in the nucleon.


title:
Neutrino emission from compact stars and inhomogeneous color
  superconductivity

abstract:
  We discuss specific heat and neutrino emissivity due to direct Urca processes
for quark matter in the color superconductive Larkin-Ovchinnikov-Fulde-Ferrell
(LOFF) phase of Quantum-Chromodynamics. We assume that the three light quarks
$u, d, s$ are in a color and electrically neutral state and interact by a four
fermion Nambu-Jona Lasinio coupling. We study a LOFF state characterized by a
single plane wave for each pairing. From the evaluation of neutrino emissivity
and fermionic specific heat, the cooling rate of simplified models of compact
stars with a quark core in the LOFF state is estimated.


title: Electromagnetic Hadron Form Factors and Higher Fock Components

abstract:
  Investigation of the spacelike and timelike electromagnetic form factors of
hadrons, within a relativistic microscopical model characterized by a small set
of hypothesis, could shed light on the components of hadron states beyond the
valence one. Our relativistic approach has been successfully applied first to
the pion and then the extension to the nucleon has been undertaken. The pion
case is shortly reviewed as an illustrative example for introducing the main
ingredients of our approach, and preliminary results for the nucleon in the
spacelike range $-10 (GeV/c)^2\le q^2 \le 0$ are evaluated.


title:
Quark matter in neutron stars within the Nambu - Jona-Lasinio model and
  confinement

abstract:
  The quark matter equation of state (EOS) derived from the standard Nambu -
Jona-Lasinio (NJL) model is soft enough to render neutron stars (NS) unstable
at the onset of the deconfined phase, and no pure quark matter can be actually
present in its interior. Since this is a peculiarity of the NJL model, we have
studied a modified NJL model with a momentum cut-off which depends on the
density. This procedure, which improves the agreement between QCD and NJL model
at large density, modifies the standard NJL equation of state, and then it is
potentially relevant for the stability analysis of neutron stars. We show that
also within this approach, the NS instability still persists, and that the
vacuum pressure, as a signal of quark confinement, has a fundamental role for
the NS stability. In this respect, our conclusions point to a relationship
between confinement and NS stability.


title:
Probing Pseudo-Dirac Neutrino through Detection of Neutrino Induced
  Muons from GRB Neutrinos

abstract:
  The possibility to verify the pseudo-Dirac nature of neutrinos is
investigated here via the detection of ultra high energy neutrinos from distant
cosmological objects like GRBs. The very long baseline and the energy range
from $\sim$ TeV to $\sim$ EeV for such neutrinos invokes the likelihood to
probe very small pseude-Dirac splittings. The expected secondary muons from
such neutrinos that can be detected by a kilometer scale detector such as
ICECUBE is calculated. The pseudo-Dirac nature, if exists, will show a
considerable departure from flavour oscillation scenario in the total yield of
the secondary muons induced by such neutrinos.


title: Long Range Forward-Backward Correlations and the Color Glass Condensate

abstract:
  We discuss forward-backward correlations in the mutliplicity of produced
particles in heavy ion collisions. We find the Color Glass Condensate generates
distinctive predictions for the long range component of this correlation. In
particular, we predict the growth of the long range correlation with the
centrality of the collision. We argue that the correlation for mesons is
stronger than that for baryons.


title:
Interference between doubly-Cabibbo-suppressed and Cabibbo-favored
  amplitudes in $D^0 \to K_S(\pi^0,\eta,\eta')$ decays

abstract:
  A definite relative phase and amplitude exists between the doubly-Cabibbo-%
suppressed amplitude for $D^0 \to \ko M^0$ and the Cabibbo-favored amplitude
for $D^0 \to \ok M^0$, where $M^0 = (\pi^0,\eta,\eta')$: $A(D^0 \to \ko M^0) =
- \tan^2 \theta_C A(D^0 \to \ok M^0)$. Here $\theta_C$ is the Cabibbo angle.
This relation, although previously recognized (for $M^0 = \pi^0$) as a
consequence of the U-spin subgroup of SU(3), is argued to be less sensitive to
corrections involving SU(3) breaking than related U-spin relations involving
charged kaons or strange $D$ mesons. A corresponding relation between $D^+ \to
\ko \pi^+$ and $D^+ \to \ok \pi^+$ is not predicted by U-spin. As a
consequence, one expects the asymmetry parameters $R(D^0,M^0) \equiv
[\Gamma(D^0 \to K_S M^0) - \Gamma(D^0 \to K_L M^0)/[\Gamma(D^0 \to K_S M^0) +
\Gamma(D^0 \to K_L M^0)]$ each to be equal to $2 \tan^2 \theta_C = 0.106$, in
accord with a recent CLEO measurement $R(D^0) \equiv R(D^0,\pi^0) = 0.122 \pm
0.024 \pm 0.030$. No prediction for the corresponding ratio $R(D^+)$ is
possible on the basis of U-spin.


title: Exclusive Charmless $B$ Decays in QCD

abstract:
  The problem of hadronic input in charmless nonleptonic B decays is discussed.
QCD sum rules and their light-cone versions (LCSR) provide an important part of
this input, such as the decay constant $f_B$ and $B\to \pi$ form factor.
Employing the LCSR technique, the $B\to \pi\pi$ hadronic matrix elements with
emission, penguin and annihilation topologies are calculated, with no evidence
for large nonfactorizable effects and/or strong phases.


title: Chromomagnetism, flavour symmetry breaking and S-wave tetraquarks

abstract:
  The chromomagnetic interaction, with full account for flavour-symmetry
breaking, is applied to S-wave configurations containing two quarks and two
antiquarks. Phenomenological implications are discussed for light, charmed,
charmed and strange, hidden-charm and double-charm mesons, and extended to
their analogues with beauty.


title: Multiplicity distributions inside parton cascades developing in a medium

abstract:
  The explanation of the suppression of high-pT hadron yields at RHIC in terms
of jet-quenching implies that the multiplicity distributions of particles
inside a jet and jet-like particle correlations differ strongly in
nucleus-nucleus collisions at RHIC or at the LHC from those observed at e+e- or
hadron colliders. We present a framework for describing the medium-induced
modification, which has a direct interpretation in terms of a probabilistic
medium-modified parton cascade, and which treats leading and subleading partons
on an equal footing. We show that our approach can account for the strong
suppression of single inclusive hadron spectra measured in Au-Au collisions at
RHIC, and that this implies a characteristic distortion of the single inclusive
distribution of soft partons inside the jet. We determine, as a function of the
jet energy, to what extent the soft fragments within a jet can be measured
above some momentum cut.


title: Gluon shadowing in the Glauber-Gribov model

abstract:
  New data from HERA experiment on (diffractive) deep inelastic scattering has
been used to parameterize nucleon and Pomeron structure functions. Within the
Gribov theory, the parameterizations were employed to calculate gluon shadowing
for various heavy ions and compared our results with predictions from other
models. Calculations for d+Au collisions at forward rapidities at
ultra-relativistic energies have been made and are compared to RHIC data on the
nuclear modification factor. Results for gluon shadowing are also confronted
with recent data on the nuclear modification factor at $\sqrt{s} = 17.3$ GeV at
various values of the Feynman variable $x_F$, and the energy dependence of the
effect is discussed.


title:
New Quark Relations for Hadron Masses and Magnetic Moments - A Challenge
  for Explanation from QCD

abstract:
  Prompted by the recent surprising results in QCD spectroscopy, we extend the
treatment of the constituent quark model showing that mass differences and
ratios have the same values when obtained from mesons and baryons. We obtain
several new successful relations involving hadrons containing two and three
strange quarks and hadrons containing heavy quarks and give a new prediction
regarding spin splitting between doubly charmed baryons. We provide numerical
evidence for an effective supersymmetry between mesons and baryons related by
replacing a light antiquark by a light diquark. We also obtain new relations
between quark magnetic moments and hadron masses. Limits of validity of this
approach and disagreements with experiment in properties of the Sigma and Xi
baryons are discussed as possible clues to a derivation from QCD.


title: New Perspectives for QCD from AdS/CFT

abstract:
  The AdS/CFT correspondence between conformal field theory and string states
in an extended space-time has provided new insights into not only hadron
spectra, but also their light-front wavefunctions. We show that there is an
exact correspondence between the fifth-dimensional coordinate of anti-de Sitter
space $z$ and a specific impact variable $\zeta$ which measures the separation
of the constituents within the hadron in ordinary space-time. This connection
allows one to predict the form of the light-front wavefunctions of mesons and
baryons, the fundamental entities which encode hadron properties and scattering
amplitudes. A new relativistic Schr\"odinger light-cone equation is found which
reproduces the results obtained using the fifth-dimensional theory.


title: Thermal leptogenesis in extended supersymmetric seesaw

abstract:
  We consider an extended supersymmetric SO(10) seesaw model with only doublet
Higgs scalars, in which neutrino masses are suppressed by the scale of D-parity
violation. Leptogenesis can occur at the TeV scale through the decay of a
singlet Sigma, thereby avoiding the gravitino crisis. Washout of the asymmetry
can be effectively suppressed by the absence of direct couplings of Sigma to
leptons.


title: CPT/Lorentz Invariance Violation and Neutrino Oscillation

abstract:
  We analyze the consequences of violation of Lorentz and $CPT$ invariance in
the massless neutrino sector by deforming the canonical anti-commutation
relations for the fields. We show that, for particular choices of the
deformation, oscillation between massless neutrino species takes place when
only Lorentz invariance is violated. On the other hand, if both Lorentz and
$CPT$ invariances are violated, we show that there is no oscillation between
massless neutrino species. Comparing with the existing experimental data on
neutrino oscillations, we obtain bounds on the parameter for Lorentz invariance
violation.


title: Supersymmetry and CP violation in |\Delta S|=1 tau-decays

abstract:
  We compute the SUSY effective hamiltonian that describes the |\Delta S|=1
semileptonic decays of tau leptons. We provide analytical expressions for
supersymmetric contribution to tau --> u bar{s} nu_{tau} transition in mass
insertion approximation. We show that SUSY contributions may enhance the CP
asymmetry of tau --> K pi nu_{tau} decays by several orders of magnitude than
the standard model expectations. However, the resulting asymmetry is still well
below the current experimental limits obtained by CLEO collaborations. We
emphasize that measuring CP rate asymmetry in this decay larger than 10^{-6}
would be a clear evidence of physics beyond the supersymmetric extensions of
the standard model.


title: B -> K* gamma vs B -> rho gamma and |V_td/V_ts|

abstract:
  We determine |V_{\rm td}/V_{\rm ts}| = 0.192 \pm 0.016_ exp \pm 0.014_th from
B -> (K^*,rho) gamma as measured by the B-factories Babar and Belle.
  This version differs from the original proceedings by the inclusion of the
new BaBar measurement of B -> rho(omega) gamma presented at ICHEP 2006, which
significantly shifts the results for |V_{td}/V_{ts}|.


title: Flavour Physics and CP Violation

abstract:
  The starting point of these lectures is an introduction to the weak
interactions of quarks and the Standard-Model description of CP violation,
where the central role is played by the Cabibbo-Kobayashi-Maskawa matrix and
the corresponding unitarity triangles. Since the B-meson system will govern the
stage of (quark) flavour physics and CP violation in this decade, it will be
our main focus. We shall classify B-meson decays, introduce the theoretical
tools to deal with them, investigate the requirements for non-vanishing
CP-violating asymmetries, and discuss the main strategies to explore CP
violation and the preferred avenues for physics beyond the Standard Model to
enter. This formalism is then applied to discuss the status of important
B-factory benchmark modes, where we focus on puzzling patterns in the data that
may indicate new-physics effects, as well as the prospects for B-decay studies
at the LHC.


title: A Canonical Ds(2317)?

abstract:
  It is shown that quark mass dependence induced by one loop corrections to the
Breit-Fermi spin-dependent one gluon exchange potential permit an accurate
determination of heavy-light meson masses. Thus the $D_s(2317)$ is a canonical
$c\bar s$ meson in this scenario. The multiplet splitting relationship of
chiral doublet models, $M(1^+)-M(1^-) = M(0^+) -M(0^-)$, holds to good accuracy
in the $D$ and $D_s$ systems, but is accidental. Radiative transitions and
bottom flavoured meson masses are discussed.


title: The Bulk Viscosity of High-Temperature QCD

abstract:
  We compute the bulk viscosity zeta of high-temperature QCD to leading order
in powers of the running coupling alpha_s(T). We find that it is negligible
compared to shear viscosity eta for any alpha_s that might reasonably be
considered small. The physics of bulk viscosity in QCD is a bit different than
in scalar phi^4 theory. In particular, unlike in scalar theory, we find that an
old, crude estimate of zeta as 15 ((1/3)-v_s^2)^2 eta gives the correct order
of magnitude, where v_s is the speed of sound. We also find that leading-log
expansions of our result for zeta are not accurate except at very small
coupling.


title:
Axino dark matter from Q-balls in Affleck-Dine baryogenesis and the
  $\Omega_b - \Omega_{DM}$ coincidence problem

abstract:
  We show that the $\Omega_b - \Omega_{DM}$ coincidence can naturally be
explained in a framework where axino cold dark matter is predominantly produced
in non-thermal processes involving decays of Q-balls formed in
Affleck-Dinebaryogenesis. In this approach the similarity between $\Omega_b$
and $\Omega_{DM}$ is a direct consequence of the (sub-)GeV scale of the mass of
the axino.


title: A new bound on supersymmetric Q-balls

abstract:
  Stable baryonic Q-balls, which appear in supersymmetric extensions of the
Standard Model, could form at the end of cosmological inflation from
fragmentation of the Affleck-Dine condensate. They can be dark matter. The
existing bounds rely on the ability of Super-Kamiokande detector to trigger on
a slowly moving bright source, which may be difficult for techinical reasons.
We present a weaker but more robust bound based on the flux of neutrinos
produced by relic Q-balls interacting in Earth.


title:
Light baryon magnetic moments and N -> Delta gamma transition in a
  Lorentz covariant chiral quark approach

abstract:
  We calculate magnetic moments of light baryons and N -> Delta gamma
transition characteristics using a manifestly Lorentz covariant chiral quark
approach for the study of baryons as bound states of constituent quarks dressed
by a cloud of pseudoscalar mesons.


title: Dalitz Analyses: A Tool for Physics within and Beyond the Standard Model

abstract:
  Dalitz analyses are introduced as the method for studying hadronic decays. An
accurate description of hadron final states is critical not only to an
understanding of the strong coupling regime of QCD, but also to the precision
extraction of CKM matrix elements. The relation of such final state
interactions to scattering processes is discussed.


title: Baryogenesis in the MSSM, nMSSM and NMSSM

abstract:
  We compare electroweak baryogenesis in the MSSM, nMSSM and NMSSM. We comment
on the different sources of CP violation, the phase transition and constraints
from EDM measurements.


title:
Twist-3 pion and kaon distribution amplitudes from the instanton vacuum
  with flavor SU(3) symmetry breaking

abstract:
  We investigate the twist-3 pion and kaon distribution amplitudes of the
pseudoscalar (phi^p_{pi,K}) and pseudotensor (phi^{sigma}_{pi,K}) types, based
on the effective chiral action from the instanton vacuum. Effects of flavor
SU(3) symmetry breaking are explicitly taken into account. The Gegenbauer
moments and the moments of the distribution amplitudes (<xi^m>) are also
computed. Our results are summarized as follows: a^p_{2,pi} ~ 0.4, a^p_{1,K} ~
0.02 and a^p_{2,K} ~ 0.14, and a^{sigma}_{2,pi} ~ 0.02 and a^{sigma}_{1,K} ~
a^{sigma}_{2,K} ~ 0; <xi^2>^p_{\pi} ~ <xi^2>^p_K ~ 0.37 and <xi>^p_K ~ 0, and
<xi^2>^{sigma}_{pi} ~ <xi^2>^{sigma}_K ~ 0.20 and <xi>^{sigma}_K ~ 0. We
compare our results with those from the QCD sum rules. We also discuss the
relevant Wilson coefficients which were analyzed recently in chiral
perturbation theory.


title:
Isolating Vector Boson Scattering at the LHC: gauge cancellations and
  the Equivalent Vector Boson Approximation vs complete calculations

abstract:
  We have studied the possibility of extracting the $W^+W^-\to W^+W^-$ signal
using the process $us\to cd W^+W^-$ as a test case. We have investigated
numerically the strong gauge cancellations between signal and irreducible
background, analysing critically the reliability of the Equivalent Vector Boson
Approximation which is commonly used to define the signal. Complete matrix
elements are necessary to study Electro--Weak Symmetry Breaking effects at high
$WW$ invariant mass.


title: One-Loop Corrections to the T-Parameter in a Three Site Higgsless Model

abstract:
  These results have been incorporated into an expanded version of
hep-ph/0607191 that discusses both the S and T parameters in the three site
Higgless model.


title:
Towards a Complete Theory of Fermion Masses and Mixings with SO(3)
  Family Symmetry and 5d SO(10) Unification

abstract:
  We construct a complete 4d model of fermion masses and mixings in the
Pati-Salam SU(4) x SU(2)_L x SU(2)_R framework governed by an SO(3) gauged
Family Symmetry. The relevant low energy effective Yukawa operators are
constructed so that the SO(3) flavons enter at the simplest possible one-flavon
level, with couplings enforced by an additional U(1) x Z_2 symmetry. The
simplicity of the flavon sector allows the messenger sector to be fully
specified, allowing the ultraviolet completion of the model at the 4d
renormalizable level. The model predicts approximate tri-bimaximal lepton
mixing via the see-saw mechanism with sequential dominance, and vacuum
alignment of flavons, with calculable deviations described by the neutrino sum
rule. We perform a numerical analysis of the emerging charged fermion spectra
and mixings. The 4d model is shown to result from a 5d orbifold GUT model based
on SO(3) x SO(10), where small flavon vacuum expectation values originate from
bulk volume suppression.


title: An SO(10) GUT Model with $S4$ Flavor Symmetry

abstract:
  We present a supersymmetric grand unification model based on SO(10) group
with $S4$ flavor symmetry. In this model, the fermion masses are from Yukawa
couplings involving $\bf{10}$ and $\bar{\bf{126}}$ Higgs multiplets and the
flavor structures of mass matrices of both quarks and leptons are determined by
spontaneously broken $S4$. This model fits all of the masses and mixing angles
of the quarks and leptons. For the most general CP-violation scenario, this
model gives $\sin\theta_{13}$ a wide range of values from zero to the current
bound with the most probable values $0.02-0.09$. With certain assumptions where
leptonic phases have same CP-violation source as CKM phase, one gets a narrower
range $0.03-0.09$ for $\sin\theta_{13}$ with the most probable values
$0.04-0.08$. This model gives leptonic Dirac CP phase the most probable values
2-4 radians in the general CP-violation case.


title:
O(\alpha_s^3) contributions to F_L^{Q\bar{Q}}(x,Q^2) for large
  virtualities

abstract:
  The $O(\alpha_s^3)$ contributions to the heavy flavor Wilson coefficients for
the structure function $F_L(x,Q^2)$ are calculated in the region $Q^2 \gg m^2$
using the renormalization group method.


title:
The Longitudinal Heavy Quark Structure Function F_{L}^{Q\bar{Q}} in the
  Region Q^2 \gg m^2 at O(\alpha_s^3)

abstract:
  The logarithmic and constant contributions to the Wilson coefficient of the
longitudinal heavy quark structure function to $O(\alpha_s^3)$ are calculated
using mass factorization techniques in Mellin space. The small $x$ behaviour of
the Wilson coefficient is determined. Numerical illustrations are presented.


title: Solution to the LHC Inverse Problem

abstract:
  The "LHC Inverse Problem" refers to the question of determining the
underlying physical theory giving rise to the signals expected to be seen at
the Large Hadron Collider. The solution to this problem (Bard) is reviewed. The
combination of CDF and D0 data is motivated.


title: Refined gluino and squark pole masses beyond leading order

abstract:
  The physical pole and running masses of squarks and gluinos have recently
been related at two-loop order in a mass-independent renormalization scheme. I
propose a general method for improvement of such formulas, and argue that
better accuracy results. The improved version gives an imaginary part of the
pole mass that agrees exactly with the direct calculation of the physical width
at next-to-leading order. I also find the leading three-loop contributions to
the gluino pole mass in the case that squarks are heavier, using effective
field theory and renormalization group methods. The efficacy of these
improvements for the gluino and squarks is illustrated with numerical examples.
Some necessary three-loop results for gauge coupling and fermion mass beta
functions and pole masses in theories with more than one type of fermion
representation, which are not directly accessible from the published
literature, are presented in an Appendix.


title: Bootstrapping One-Loop QCD Amplitudes

abstract:
  We review the recently developed bootstrap method for the computation of
high-multiplicity QCD amplitudes at one loop. We illustrate the general
algorithm step by step with a six-point example. The method combines
(generalized) unitarity with on-shell recursion relations to determine the not
cut-constructible, rational terms of these amplitudes. Our bootstrap approach
works for arbitrary configurations of gluon helicities and arbitrary numbers of
external legs.


title: Antishadowing effects in the unitarized BFKL equation

abstract:
  A unitarized BFKL equation incorporating shadowing and antishadowing
corrections of the gluon recombination is proposed. This equation reduces to
the Balitsky-Kovchegov evolution equation near the saturation limit. We find
that the antishadowing effects have a sizeable influence on the gluon
distribution function in the preasymptotic regime.


title: On-shell Recursion Relations for n-point QCD

abstract:
  We present on the use of on-shell recursion relations. These can be used not
only for calculating tree amplitudes, including those with masses, but also to
compute analytically the missing rational terms of one-loop QCD amplitudes.
Combined with the cut-containing pieces calculated using a unitarity approach
complete one-loop QCD amplitudes can be derived. This approach is discussed in
the context of the adjacent 2-minus all-multiplicity QCD gluon amplitude.


title: CP violation in neutrino mass matrix

abstract:
  We constructed rephasing invariant measures of CP violation with elements of
the neutrino mass matrix, in the basis in which the charged lepton mass matrix
is diagonal. We discuss some examples of neutrino mass matrices with texture
zeroes, where the present approach is applicable and demonstrate how it
simplifies an analysis of CP violation. We applied our approach to study CP
violation in all the phenomenologically acceptable 3-generation two-zero
texture neutrino mass matrices and shown that in any of these cases there is
only one CP phase which contributes to the neutrino oscillation experiment and
there are no Majorana phases.


title: Small size pentaquark width: calculation in QCD sum rules

abstract:
  The pentaquark width is calculated in QCD sum rules. The higher dimension
operators contribution is accounted. It is shown, that $\Gamma_{\Theta}$ should
be very small, less than $1Mev$.


title:
Dilepton yields from Brown-Rho scaled vector mesons including memory
  effects

abstract:
  Brown-Rho scaling, which has been strongly discussed after recent NA60 data
was presented, is investigated within a nonequilibrium field theoretical
description that includes quantum mechanical memory. Dimuon yields are
calculated by application of a model for the fireball, and strong modifications
are found in the comparison to quasi-equilibrium calculations, which assume
instantaneous adjustment of all meson properties to the surrounding medium. In
addition, we show results for the situation of very broad excitations.


title: Higher Twist Effects in Deep Inelastic Scattering on Nuclei

abstract:
  Particle production in deep inelastic scattering on nuclei is reduced due to
absorption of the produced particles in the nucleus. The photon ejects a quark
from a bound nucleon which propagates through the nucleus forming a prehadron
before turning into a hadron. We calculate the higher twist effect in
hadronization which dominates the $z \to 1$ region of fragmentation.


title:
Can R-parity violating supersymmetry be seen in long baseline beta-beam
  experiments?

abstract:
  Long baseline oscillation experiments may well emerge as test beds for
neutrino interactions as are present in R-parity violating supersymmetry. We
show that flavour diagonal (FDNC) and flavour changing (FCNC) neutral currents
arising therefrom prominently impact a neutrino $\beta$-beam experiment with
the source at CERN and the detector at the proposed India-based Neutrino
Observatory. These interactions may preclude any improvement of the present
limit on $\theta_{13}$ and cloud the hierarchy determination unless the upper
bounds on ${\not R}$ couplings, particularly $\lambda^{\prime}$, become
significantly tighter. If ${\not R}$ interactions are independently established
then from the event rate a lower bound on $\theta_{13}$ may be set. We show
that there is scope to see a clear signal of non-standard FCNC and FDNC
interactions, particularly in the inverted hierarchy scenario and also
sometimes for the normal hierarchy. In favourable cases, it may be possible to
set lower and upper bounds on $\lambda^{\prime}$ couplings. FCNC and FDNC
interactions due to $\lambda$ type ${\not R}$ couplings are unimportant.


title:
Model Independent Form Factors for Spin Independent Neutralino-Nucleon
  Scattering from Elastic Electron Scattering Data

abstract:
  Theoretical calculations of neutralino-nucleon interaction rates with various
nuclei are of great interest to direct dark matter searches such as CDMS,
EDELWEISS, ZEPLIN, and other experiments since they are used to establish upper
bounds on the WIMP-proton cross section. These interaction rates and cross
sections are generally computed with standard, one or two parameter
model-dependent nuclear form factors, which may not exactly mirror the actual
form factor for the particular nucleus in question. As is well known, elastic
electron scattering can allow for very precise determinations of nuclear form
factors and hence nuclear charge densities for spherical or near-spherical
nuclei. We use charge densities derived from elastic electron scattering data
to calculate model independent, analytic form factors for various target nuclei
important in dark matter searches, such as Si, Ge, S, Ca and others. We have
found that for nuclear recoils in the range of 1-100 keV significant
differences in cross sections and rates exist when the model independent form
factors are used: at 30 keV nuclear recoil the form factors squared differ by a
factor of 1.06 for $^{28}$Si, 1.11 for $^{40}$Ca, 1.27 for $^{70}$Ge, and 1.92
for $^{129}$Xe. We show the effect of different form factors on the upper limit
on the WIMP-proton cross section obtained with a hypothetical $^{70}$Ge
detector during a 100 kg-day effective exposure. Helm form factors with various
parameter choices differ at most by 10--20% from the best (Fourier Bessel) form
factor, and can approach it to better than 1% if the parameters are chosen to
mimic the actual nuclear density.


title:
Dense-dilute factorization for a class of stochastic processes and for
  high energy QCD

abstract:
  Stochastic processes described by evolution equations in the universality
class of the FKPP equation may be approximately factorized into a linear
stochastic part and a nonlinear deterministic part. We prove this factorization
on a model with no spatial dimensions and we illustrate it numerically on a
one-dimensional toy model that possesses some of the main features of high
energy QCD evolution. We explain how this procedure may be applied to QCD
amplitudes, by combining Salam's Monte-Carlo implementation of the dipole model
and a numerical solution of the Balitsky-Kovchegov equation.


title: Modeling dihadron fragmentation functions

abstract:
  We present a model for dihadron fragmentation functions, describing the
fragmentation of a quark into two unpolarized hadrons. We tune the parameters
of our model to the output of the PYTHIA event generator for two-hadron
semi-inclusive production in deep inelastic scattering at HERMES. Once the
parameters of the model are fixed, we make predictions for other unknown
fragmentation functions and for a single-spin asymmetry in the azimuthal
distribution of pi+ pi- pairs in semi-inclusive deep inelastic scattering on a
transversely polarized target at HERMES and COMPASS. Such asymmetry could be
used to measure the quark transversity distribution function.


title: Interplay of the Chiral and Large N_c Limits in pi N Scattering

abstract:
  Light-quark hadronic physics admits two useful systematic expansions, the
chiral and 1/N_c expansions. Their respective limits do not commute, making
such cases where both expansions may be considered to be especially
interesting. We first study pi N scattering lengths, showing that (as expected
for such soft-pion quantities) the chiral expansion converges more rapidly than
the 1/N_c expansion, although the latter nevertheless continues to hold. We
also study the Adler-Weisberger and Goldberger-Miyazawa-Oehme sum rules of pi N
scattering, finding that both fail if the large N_c limit is taken prior to the
chiral limit.


title: Darwin and Phenomenology Beyond the Standard Model

abstract:
  After preamble about Darwin, my talk described the conformality approach to
extending the standard model of particle phenomenology using an assumption of
no conformal anomaly at high energy. Topics included quiver gauge theory, the
conformality approach to phenomenology, strong-electroweak unification at 4
TeV, cancellation of quadratic divergences, cancellation of U(1) anomalies, and
a dark matter candidate.


title: Rate and CP-asymmetry sum rules in $B \to K \pi$

abstract:
  The observed violation of $A_{CP}(B^0 \to K^+ \pi^-) = A_{CP}(B^+ \to K^+
\pi^0)$ has been recently mentioned as a puzzle for the standard model. We
point out that while this violation may be accounted for by a large
color-suppressed tree amplitude, a sum rule involving three or four $B\to K\pi$
CP asymmetries should hold. The current experimental status of these sum rules
and of a sum rule for $B\to K\pi$ decay rates is presented.


title:
Spin-one color superconductivity in compact stars?- an analysis within
  NJL-type models

abstract:
  We present results of a microscopic calculation using NJL-type model of
possible spin-one pairings in two flavor quark matter for applications in
compact star phenomenology. We focus on the color-spin locking phase (CSL) in
which all quarks pair in a symmetric way, in which color and spin states are
locked. The CSL condensate is particularly interesting for compact star
applications since it is flavor symmetric and could easily satisfy charge
neutrality. Moreover, the fact that in this phase all quarks are gapped might
help to suppress the direct Urca process, consistent with cooling models. The
order of magnitude of these small gaps (~1 MeV) will not influence the EoS, but
their also small critical temperatures (T_c ~800 keV) could be relevant in the
late stages neutron star evolution, when the temperature falls below this value
and a CSL quark core could form.


title: Two Categories of Approximately mu-tau Symmetric Neutrino Mass Textures

abstract:
  Our approximately \mu-\tau symmetric neutrino mass textures fall into two
different categories, whose behaviors in the \mu-\tau symmetric limit are
characterized by either \sin(theta_{13})->0 (referred to as C1)), or
\sin(theta_{12})->0 (referred to as C2)). We present ten phenomenologically
viable neutrino mass textures: two for the normal mass hierarchy, three for the
inverted mass hierarchy, and five for the quasi degenerate mass pattern. Tiny
\mu-\tau symmetry breaking ensures that \sin^2(theta_{13}) << 1 for C1), and
\Delta m^2_\odot/\Delta m^2_{atm} (\equiv R) << 1 for C2). A correlation among
small quantities is provided by \cos 2(theta_{23}) \sim \sin(theta_{13}) for
C1), and by either \cos(2theta_{23}) \sim R, or
\cos(2theta_{23})\sin(theta_{13}) \sim R for C2). It is further shown that
\tan(2theta_{12}) \sim \cos(2theta_{23})/\sin(theta_{13}) is satisfied for C2).
We find specific properties for each mass ordering, which are discussed in this
article.


title:
A geometrical scaling solution to the BFKL Pomeron Calculus in the
  saturation domain

abstract:
  In this paper the exact analytical solution is found for the BFKL Pomeron
calculus in QCD, in which all Pomeron loops have been included. This solution
manifests the geometrical scaling behaviour and matches with the solution to
the linear evolution equation on the line $r^2= 1/Q^2_s(x)$, where $r$ is the
dipole size and $Q_s$ is the saturation momentum.


title: Time Evolution of Jets and Perturbative Color Neutralization

abstract:
  In-medium production of leading hadrons in hard reactions, carrying the main
fraction of the jet momentum, involves two stages: (i) the parton originated
from the hard process propagates through the medium radiating gluons due to the
initial hard collision, as well as to multiple interactions in the medium; (ii)
perturbative color neutralization, e.g. picking up an anti-colored parton
produced perturbatively, followed by evolution and attenuation of the
(pre)hadron in the medium. The color neutralization (or production) length for
leading hadrons is controlled by coherence, energy conservation and Sudakov
suppression. The pT-broadening is a sensitive and model independent probe for
the production length. The color neutralization time is expected to shrink with
rising hard scale. In particular, we found a very fast energy dissipation by a
highly virtual parton: half of the jet energy is radiated during the first
Fermi. Energy conservation makes the production of leading hadrons at longer
times difficult.


title:
Analysis of Anomalous Interactions With Heavy Leptons at $ep$, $e^+e^-$
  and $pp$ Colliders

abstract:
  We consider possible production of heavy leptons via anomalous interactions
at future $ep$ colliders (THERA and LHeC), $e^+e^-$ colliders (ILC and CLIC)
and $pp$ collider CERN LHC. The production, backgrounds and signatures of heavy
leptons are analyzed. We obtain the upper mass limits of 800 GeV at LHeC, 450
GeV at ILC and 650 GeV at LHC for optimal choices of relevant parameters.


title: Dynamically generated hidden-charm baryon resonances

abstract:
  Identifying a zero-range exchange of vector mesons as the driving force for
the s-wave scattering of pseudo-scalar mesons off the baryon ground states, a
rich spectrum of hadronic nuclei is formed. We argue that chiral symmetry and
large-$N_c$ considerations determine that part of the interaction which
generates the spectrum. We suggest the existence of strongly bound
crypto-exotic baryons, which contain a charm-anti-charm pair. Such states are
narrow since they can decay only via OZI-violating processes.


title: Semi-Inclusive B Decays and a Model for Soft-Gluon Effects

abstract:
  We compare experimental spectra of radiative and semileptonic B decays with
the predictions of a model based on soft-gluon resummation to next-to-next-to
leading order and on a ghost-less time-like coupling. We find a good agreement
with photon spectra in the radiative decay and with hadron mass distributions
in the semileptonic one: the extracted values for alpha_S(m_Z) are in agreement
with the current PDG average within at most two standard deviations. The
agreement is instead less good for the electron spectra measured by BaBar and
Belle in semileptonic decays for small electron energies (< 2.2 GeV): our
spectrum is harder. We also show that, in general, the inclusion of
next-to-next-to-leading order effects is crucial for bringing the model closer
to the data and that the non-power expansion introduced in the framework of
analytic coupling studies does not accurately describe soft-gluon effects.


title:
Transverse momentum dependence of the quark helicity distributions and
  the Cahn effect in double-spin asymmetry $A_{LL}$ in Semi Inclusive DIS

abstract:
  Within the LO QCD parton model of Semi Inclusive Deep Inelastic Scattering,
$\ell N \to \ell h X$, with unintegrated quark distribution and fragmentation
functions, we study the $\bfP_{hT}$ dependence of the double longitudinal-spin
asymmetry $A_{LL}$. We include 1/Q kinematic corrections, which induce an
azimuthal modulation of the asymmetry, analogous to the Cahn effect in
unpolarized SIDIS. We show that a study of $A_{LL}$ and of the weighted DSA
$A_{LL}^{\cos\phi_h}$ allows to extract the transverse momentum dependence of
the unintegrated helicity distribution function $g_{1L}^q(x,k_\perp)$ [or
$\Delta q(x, k_\perp)]$. Predictions, based on some models for the unknown
functions, are given for ongoing COMPASS, HERMES and JLab experiments.


title: Two Gallium data sets, spin flavour precession and KamLAND

abstract:
  We reexamine the possibility of a time modulation of the low energy solar
neutrino flux which is suggested by the average decrease of the Ga data in line
with our previous arguments. We perform two separate fits to the solar neutrino
data, one corresponding to 'high' and the other to 'low' Ga data, associated
with low and high solar activity respectively. We therefore consider an
alternative to the conventional solar+KamLAND fitting, which allows one to
explore the much wider range of the $\theta_{12}$ angle permitted by the
KamLAND fitting alone. We find a solution with parameters $\Delta
m^2_{21}=8.2\times 10^{-5} eV^2, tan^{2}\theta=0.31$ in which the 'high' and
the 'low' Ga rates lie far apart and are close to their central values and is
of comparable quality to the global best fit, where these rates lie much closer
to each other. This is an indication that the best fit in which all solar and
KamLAND data are used is not a good measure of the separation of the two Ga
data sets, as the information from the low energy neutrino modulation is
dissimulated in the wealth of data. Furthermore for the parameter set proposed
one obtains an equally good fit to the KamLAND energy spectrum and an even
better fit than the 'conventional' LMA one for the reactor antineutrino
survival probability as measured by KamLAND.


title: Percolation and high energy cosmic rays above $10^{17}$ eV

abstract:
  In this work we argue that, in the interpretation of the energy dependence of
the depth of the shower maximum and of the muon content in high energy cosmic
ray showers ($E > 10^{17}$ eV), other variables besides the composition may
play an important role, in particular those characterising the first (high
energy) hadronic collisions. The role of the inelasticity, of the nature of the
leading particle, and of the particle multiplicity are discussed. A consistent
interpretation of existing data within a string percolation model implemented
in a hybrid, one dimensional simulation method is given.


title:
On different lagrangian formalisms for vector resonances within chiral
  perturbation theory

abstract:
  We study the relation of vector Proca field formalism and antisymmetric
tensor field formalism for spin-one resonances in the context of the large N_C
inspired chiral resonance Lagrangian systematically up to the order O(p6) and
give a transparent prescription for the transition from vector to antisymmetric
tensor Lagrangian and vice versa. We also discuss the possibility to describe
the spin-one resonances using an alternative "mixed" first order formalism,
which includes both types of fields simultaneously, and compare this one with
the former two. We also briefly comment on the compatibility of the above
lagrangian formalisms with the high-energy constraints for concrete VVP
correlator.


title:
Isentropic Equation of State of Two-Flavour QCD in a Quasi-Particle
  Model

abstract:
  We examine the isentropic QCD equation of state within a quasi-particle model
being adjusted to first principle QCD calculations of two quark flavours. In
particular, we compare with Taylor expansion coefficients of energy and entropy
densities and with the isentropic trajectories describing the hydrodynamical
expansion of a heavy-ion collision fireball.


title:
Quasi-Particle Description of Strongly Interacting Matter: Towards a
  Foundation

abstract:
  We confront our quasi-particle model for the equation of state of strongly
interacting matter with recent first-principle QCD calculations. In particular,
we test its applicability at finite baryon densities by comparing with Taylor
expansion coefficients of the pressure for two quark flavours. We outline a
chain of approximations starting from the Phi-functional approach to QCD which
motivates the quasi-particle picture.


title:
On the transport equations of cosmic neutrinos passing through Earth and
  secondary nu_mu fluxes

abstract:
  The convergence of the iterative solutions of the transport equations of
cosmic muon and tau neutrinos propagating through Earth is studied and
analyzed. For achieving a fast convergence of the iterative solutions of the
coupled transport equations of nu_tau, nubar_tau and the associated tau^{\pm}
fluxes, a new semi-analytic input algorithm is presented where the peculiar
tau-decay contributions are implemented already in the initial zeroth order
input. Furthermore, the common single transport equation for muon neutrinos is
generalized by taking into account the contributions of secondary nu_mu and
nubar_mu fluxes due to the prompt tau-decay tau -> nu_mu initiated by the
associated tau flux. Differential and total nadir angle integrated upward-going
mu^- + mu^+ event rates are presented for underground neutrino telescopes and
compared with the muon rates initiated by the primary nu_mu, nu_tau and tau
fluxes.


title: Dark Matter from new Technicolor Theories

abstract:
  We investigate dark matter candidates emerging in recently proposed
technicolor theories. We determine the relic density of the lightest, neutral,
stable technibaryon having imposed weak thermal equilibrium conditions and
overall electric neutrality of the Universe. In addition we consider sphaleron
processes that violate baryon, lepton and technibaryon number. Our analysis is
performed in the case of a first order electroweak phase transition as well as
a second order one. We argue that, in both cases, the new technibaryon
contributes to the dark matter in the Universe. Finally we examine the problem
of the constraints on these types of dark matter components from earth based
experiments.


title: Chiral Expansion from Renormalization Group Flow Equations

abstract:
  We explore the influence of the current quark mass on observables in the low
energy regime of hadronic interactions within a renormalization group analysis
of the Nambu-Jona-Lasinio model in its bosonized form. We derive current quark
mass expansions for the pion decay constant and the pion mass, and we recover
analytically the universal logarithmic dependence. A numerical solution of the
renormalization group flow equations enables us to determine effective low
energy constants from the model. We find values consistent with the
phenomenological estimates used in chiral perturbation theory.


title: Multi-Higgs boson production in the Standard Model and beyond

abstract:
  We present a calculation of the loop-induced processes gg -> HH and gg ->
HHH, and investigate the observability of multi-Higgs boson production at the
CERN Large Hadron Collider (LHC) in the Standard Model (SM) and beyond. While
the SM cross sections are too small to allow observation at the LHC, we
demonstrate that physics beyond the SM can lead to amplified, observable cross
sections. Furthermore, the applicability of the heavy top quark approximation
in two- and three-Higgs boson production is investigated. We conclude that
multi-Higgs boson production at the SuperLHC is an interesting probe of Higgs
sectors beyond the SM and warrants further study.


title: Quark-hadron duality in neutrino scattering

abstract:
  We present a phenomenological model of the quark-hadron transition in
neutrino-nucleon scattering. Using recently extracted weak nucleon transition
form factors, we investigate the extent to which local and global quark-hadron
duality is applicable in the neutrino F_1, F_2 and F_3 structure functions, and
contrast this with duality in electron scattering. Our findings suggest that
duality works relatively well for neutrino-nucleon scattering for the F_2 and
F_3 structure functions, but not as well for F_1. We also calculate the
quasielastic, resonance and deep inelastic contributions to the Adler sum rule,
and find it to be satisfied to within 10% for 0.5 < Q^2 < 2 GeV^2.


title:
A two-component geometrical model for rho production in heavy ion
  collisions

abstract:
  This paper has been withdrawn by the authors, due to issues concerning the
use of unpublished experimental data.


title:
Observables sensitive to absolute neutrino masses: A reappraisal after
  WMAP-3y and first MINOS results

abstract:
  In the light of recent neutrino oscillation and non-oscillation data, we
revisit the phenomenological constraints applicable to three observables
sensitive to absolute neutrino masses: The effective neutrino mass in single
beta decay (m_beta); the effective Majorana neutrino mass in neutrinoless
double beta decay (m_2beta); and the sum of neutrino masses in cosmology
(Sigma). In particular, we include the constraints coming from the first Main
Injector Neutrino Oscillation Search (MINOS) data and from the Wilkinson
Microwave Anisotropy Probe (WMAP) three-year (3y) data, as well as other
relevant cosmological data and priors. We find that the largest neutrino
squared mass difference is determined with a 15% accuracy (at 2-sigma) after
adding MINOS to world data. We also find upper bounds on the sum of neutrino
masses Sigma ranging from ~2 eV (WMAP-3y data only) to ~0.2 eV (all
cosmological data) at 2-sigma, in agreement with previous studies. In addition,
we discuss the connection of such bounds with those placed on the matter power
spectrum normalization parameter sigma_8. We show how the partial degeneracy
between Sigma and sigma_8 in WMAP-3y data is broken by adding further
cosmological data, and how the overall preference of such data for relatively
high values of sigma_8 pushes the upper bound of Sigma in the sub-eV range.
Finally, for various combination of data sets, we revisit the (in)compatibility
between current Sigma and m_2beta constraints (and claims), and derive
quantitative predictions for future single and double beta decay experiments.


title: Energy Loss of a Heavy Quark Produced in a Finite Size Medium

abstract:
  We study the medium-induced energy loss $-\Delta E_0(L_p)$ suffered by a
heavy quark produced at initial time in a quark-gluon plasma, and escaping the
plasma after travelling the distance $L_p$. The heavy quark is treated
classically, and within the same framework $-\Delta E_0(L_p)$ consistently
includes: the loss from standard collisional processes, initial bremsstrahlung
due to the sudden acceleration of the quark, and transition radiation. The
radiative loss {\it induced by rescatterings} $-\Delta E_{rad}(L_p)$ is not
included in our study. For a ultrarelativistic heavy quark with momentum $p
\gsim 10 {\rm GeV}$, and for a finite plasma with $L_p \lsim 5 {\rm fm}$, the
loss $-\Delta E_0(L_p)$ is strongly suppressed compared to the stationary
collisional contribution $-\Delta E_{coll}(L_p) \propto L_p$. Our results
support that $-\Delta E_{rad}$ is the dominant contribution to the heavy quark
energy loss (at least for $L_p \lsim 5 {\rm fm}$), as indeed assumed in most of
jet-quenching analyses. However they might raise some question concerning the
RHIC data on large $p_{\perp}$ electron spectra.


title:
Shear viscosity in weakly coupled ${\cal N} {=} 4$ Super Yang-Mills
  theory compared to QCD

abstract:
  We compute the shear viscosity of weakly coupled N=4 supersymmetric
Yang-Mills (SYM) theory. Our result for [eta/s], the viscosity to
entropy-density ratio, is many times smaller than the corresponding
weak-coupling result in QCD. This suggests that [eta/s] of QCD near the
transition point is several times larger than the viscosity bound, [eta/s] >=
1/4 pi.


title: Saturation physics at HERA and RHIC: An unified description

abstract:
  One of the frontiers of QCD which are intensely investigated in high energy
experiments is the high energy (small $x$) regime, where we expect to observe
the non-linear behavior of the theory. In this regime, the growth of the parton
distribution should saturate, forming a Color Glass Condensate (CGC). In fact,
signals of parton saturation have already been observed both in $ep$ deep
inelastic scattering at HERA and in deuteron-gold collisions at RHIC.
Currently, the description of the experimental data of these experiments is
possible considering different phenomenological saturation models for the two
processes within the CGC formalism. In this letter we analyze the universality
of these dipole cross section parameterizations and verify that they are not
able to describe the HERA and RHIC data simultaneously. We analyze possible
improvements in the parameterizations and propose a new parametrization for the
forward dipole amplitude which allows us to describe quite well the small-$x$
$ep$ HERA data on $F_2$ structure function as well as the $dAu$ RHIC data on
charged hadron spectra. It is an important signature of the universality of the
saturation physics.


title: Supersymmetric Contributions to Weak Decay Correlation Coefficients

abstract:
  We study supersymmetric contributions to correlation coefficients that
characterize the spectral shape and angular distribution for polarized muon-
and beta-decays. In the minimal supersymmetric Standard Model (MSSM), one-loop
box graphs containing superpartners can give rise to non-(V-A)x(V-A) four
fermion operators in the presence of left-right or flavor mixing between
sfermions. We analyze the present phenomenological constraints on such mixing
and determine the range of allowed contributions to the weak decay correlation
coefficients. We discuss the prospective implications for future muon- and
beta-decay experiments, and argue that they may provide unique probes of
left-right mixing in the first generation scalar fermion sector.


title:
CP asymmetries in chargino production and decay: the three-body decay
  case

abstract:
  We study CP violation in chargino production and decay in the Minimal
Supersymmetric Standard Model (MSSM) with complex parameters at an e^+ e^-
linear collider with longitudinally polarized beams. We investigate
CP-sensitive asymmetries by means of triple product correlations and study
their dependence on the complex parameters M_1 and mu. We give numerical
predictions for the asymmetries and their measurability at the future
International Linear Collider. Our results show that the CP asymmetries can be
measured in a large region of the MSSM parameter space.