title: Polarization Study in B Decays to Vector Final States

abstract:
  The small longitudinal polarization fractions (50%) of $B \to \phi K^*$
measured by B factories contradict with the naive theoretical counting rules.
We review the current theoretical status of the $B\to VV$ decay studies and
calculate many of them in the perturbative QCD factorization approach based on
$k_T$ factorization. We find that the penguin annihilation and non-factorizable
emission diagrams can enhance the transverse polarization fractions. The PQCD
results agree with experiments for the measured $B\to \phi K^*$, $B\to \rho
K^*$ and $B\to \rho \rho$ channels, and we also predict new results (some
different from other approaches) for those not yet measured channels.


title: Standard and SUSY Higgs production at the LHC

abstract:
  Recent theoretical developments concerning Higgs production at the Large
Hadron Collider are reviewed, both in the Standard Model and in the MSSM.
Emphasis is put on the inclusive and exclusive cross sections for gluon fusion,
as well as on the associated production with bottom quarks.


title:
Hadron-Pair Photoproduction in Longitudinally Polarized Lepton-Nucleon
  Collisions

abstract:
  We present a detailed phenomenological study of photoproduction of two
hadrons, both with high transverse momentum, in longitudinally polarized
lepton-nucleon collisions. We consistently include ``direct'' and ``resolved''
photon contributions and examine the sensitivity of the relevant spin
asymmetries to the gluon polarization in the nucleon and to the completely
unknown parton content of circularly polarized photons. Our results are
relevant for the COMPASS and HERMES fixed-target experiments as well as for a
possible future polarized lepton-proton collider like eRHIC at BNL. So far, all
studies are limited to the lowest order approximation of QCD.


title: Up Quark Masses from Down Quark Masses

abstract:
  The quark and charged lepton masses and the angles and phase of the CKM
mixing matrix are nicely reproduced in a model which assumes SU(3)xSU(3)
flavour symmetry broken by the v.e.v.'s of fields in its bi-fundamental
representation. The relations among the quark mass eigenvalues, m_u/m_c \approx
m_c/m_t \approx m^2_d/m^2_s \approx m^2_s/m^2_b \approx
\Lambda^2_{GUT}/M^2_{Pl}, follow from the broken flavour symmetry. Large
tan(beta) is required which also provides the best fits to data for the
obtained textures. Lepton-quark grandunification with a field that breaks both
SU(5) and the flavour group correctly extends the predictions to the charged
lepton masses. The seesaw extension of the model to the neutrino sector
predicts a Majorana mass matrix quadratically hierarchical as compared to the
neutrino Dirac mass matrix, naturally yielding large mixings and low mass
hierarchy for neutrinos.


title:
On the mean parton transverse momentum versus associated hadron pT in
  di-hadron correlations at RHIC and LHC

abstract:
  From Pythia simulations of pp collisions we determine the mean transverse
momentum <Pt> of partons producing the leading and associated particles studied
in di-hadron correlations. The dependence of <Pt> on the associated particle
transverse momentum and expected differences at RHIC and LHC centre of mass
energies are discussed.


title:
Higher Harmonics in Non-Linear Vacuum from QED Effects Without Low Mass
  Intermediate Particles

abstract:
  We show that in the presence of a slowly rotating strong transverse magnetic
field there is an infinite spectrum of harmonic wave functions $A_n$ due to the
first order QED correction (in $\alpha^2$) given by the Euler-Heisenberg
Lagrangian. The frequency shifts are integer multiples $\pm \omega_0 n$ of the
magnetic field angular frequency rotation $\omega_0=2\pi\nu_m$ and the several
modes $n$ are coupled to the nearest harmonics $n\pm 1$. This is a new effect
due to QED vacuum fluctuations, not exploit before, that can explain, both
qualitatively and quantatively, the recent experimental results of the PVLAS
collaboration without the need of a low mass intermediate particle, hence
dismiss the recent claim of the discovery of the axion. [Erratum: The PVLAS
signal cannot be explained by this mechanism.]


title: What does the muon-neutrino oscillate into?

abstract:
  The favoured resolution of the atmospheric neutrino anomaly involves an
oscillation of the muon neutrino to a different state. Current experiments
allow for the latter to contain a significantly large fraction of a
non-standard flavour. We demonstrate how the next generation of experiments may
take advantage of matter effects to resolve this issue.


title: Two modes of searching for new neutrino interactions at MINOS

abstract:
  The SuperKamiokande atmospheric neutrino measurements leave substantial room
for nonstandard interactions (NSI) of neutrinos with matter in the nu_e- nu_tau
sector. Large values of the NSI couplings are accommodated if the vacuum
oscillation parameters are changed from their standard values. Short and medium
baseline neutrino beams can break this degeneracy by measuring the true vacuum
oscillation parameters with the muon neutrino disappearance mode, for which the
matter effects are negligible or subdominant. These experiments can also search
for the nu_e-nu_tau flavor changing effects directly, by looking for
nu_mu->nu_e conversion caused by the intervening matter. We discuss both of
these methods for the case of MINOS. We find that, while the present MINOS data
on nu_mu disappearance induce only minor changes on the constraints on the NSI
parameters, the situation will improve markedly with the planned increase of
the statistics by an order of magnitude. In that case, the precision will be
enough to distinguish certain presently allowed NSI scenarios from the no-NSI
case. NSI per quark of about 10% the size of the standard weak interaction
could give a nu_mu - nu_e conversion probability of the order ~ 10^{-2},
measurable by MINOS in the same high statistics scenario. In this nu_mu - nu_e
channel, the small effects of NSI could be comparable or larger than the vacuum
contribution of the small angle theta_{13}. The expected theta_{13} bound at
MINOS should be more properly interpreted as a bound in the theta_{13}-NSI
parameter space.


title:
NLO QCD corrections to W boson production with a massive b-quark jet
  pair at the Fermilab Tevatron p-pbar collider

abstract:
  We calculate the Next-to-Leading Order (NLO) QCD corrections to W-b-bbar
production including full bottom-quark mass effects. We study the impact of NLO
QCD corrections on the total cross section and invariant mass distribution of
the bottom-quark jet pair at the Fermilab Tevatron p-pbar collider. We perform
a detailed comparison with a calculation that considers massless bottom quarks.
We find that neglecting bottom-quark mass effects overestimates the NLO total
cross-section for W-b-bbar production at the Tevatron by about 8% independent
of the choice of renormalization and factorization scale.


title: Quark Masses and Mixing with A4 Family Symmetry

abstract:
  The successful A4 family symmetry for leptons is applied to quarks, motivated
by the quark-lepton assignments of SU(5). Realistic quark masses and mixing
angles are obtained, in good agreement with data. In particular, we find a
strong correlation between |V_{ub}| and the CP phase beta, thus allowing for a
decisive future test of this model.


title: Discovery of supersymmetry with degenerated mass spectrum

abstract:
  Discovery of supersymmetric (SUSY) particles at the Large Hadron
Collider(LHC) has been studied for the models where squarks and gluino are much
heavier than the lightest supersymetric particle (LSP). In this paper, we
investigate the SUSY discovery in the models with degenerated mass spectrum up
to m_LSP~0.7 m_sq. Such mass spectrum is predicted in certain parameter region
of the mixed modulas anomaly mediation (MMAM) model. We find that the effective
transverse mass of the signal for the degenerated parameters shows the
distribution similar to that of the background. Experimental sensitivity of the
SUSY particles at the LHC therefore depends on the uncertainty of the
background in this class of model. We also find that SUSY signal shows an
interesting correlation between M_eff and ETmiss which may be used to determine
the signal region properly to enhance the S/N ratio even if the sparticle
masses are rather degenerated. The structure is universal for the models with
new heavy colored particles decaying into visible particles and a stable
neutral particle, dark matter.


title: Living Dangerously with Low-Energy Supersymmetry

abstract:
  We stress that the lack of direct evidence for supersymmetry forces the soft
mass parameters to lie very close to the critical line separating the broken
and unbroken phases of the electroweak gauge symmetry. We argue that the level
of criticality, or fine-tuning, that is needed to escape the present collider
bounds can be quantitatively accounted for by assuming that the overall scale
of the soft terms is an environmental quantity. Under fairly general
assumptions, vacuum-selection considerations force a little hierarchy in the
ratio between m_Z^2 and the supersymmetric particle square masses, with a most
probable value equal to a one-loop factor.


title: Photon Defects in Noncommutative Standard Model Candidates

abstract:
  Restrictions imposed by gauge invariance in noncommutative spaces together
with the effects of ultraviolet/infrared mixing lead to strong constraints on
possible candidates for a noncommutative extension of the Standard Model. We
study a general class of noncommutative models consistent with these
restrictions. Specifically we consider models based upon a gauge theory with
the gauge group U(N_1)\times U(N_2)\times ...\times U(N_m) coupled to matter
fields transforming in the (anti)-fundamental, bi-fundamental and adjoint
representations. We pay particular attention to overall trace-U(1) factors of
the gauge group which are affected by the ultraviolet/infrared mixing.
Typically, these trace-U(1) gauge fields do not decouple sufficiently fast in
the infrared, and lead to sizable Lorentz symmetry violating effects in the
low-energy effective theory. In a 4-dimensional theory on a continuous
space-time making these effects unobservable would require making the effects
of noncommutativity tiny, M_NC>>M_P. This severely limits the phenomenological
prospects of such models. However, adding additional universal extra dimensions
the trace-U(1) factors decouple with a power law and the constraint on the
noncommutativity scale is weakened considerably. Finally, we briefly mention
some interesting properties of the photon that could arise if the
noncommutative theory is modified at a high energy scale.


title: Isocurvature bounds on axions revisited

abstract:
  The axion is one of the best motivated candidates for particle dark matter.
We study and update the constraints imposed by the recent CMB and LSS
experiments on the mass of axions produced by the misalignment mechanism, as a
function of both the inflationary scale and the reheating temperature. Under
some particular although not unconventional assumptions, the axionic field
induces too large isocurvature perturbations. Specifically, for inflation
taking place at intermediate energy scales, we derive some restrictive limits
which can only be evaded by assuming an efficient reheating mechanism, with
T>10^{11} GeV. Chaotic inflation with a quadratic potential is still compatible
with the axion scenario, provided that the Peccei-Quinn scale f_a is close to
10^{10} or 10^{11} GeV. Isocurvature bounds eliminate the possibility of a
larger f_a and a small misalignment angle. We find that isocurvature
constraints on the axion scenario must be taken into account whenever the scale
of inflation is above 10^{12} GeV; below this scale, axionic isocurvature modes
are too small to be probed by current observations.


title: K^- p scattering length from scattering experiments

abstract:
  The strong K^- p scattering length is extracted within chiral SU(3) unitary
approaches from a very large variety of fits to low-energy K^- p scattering
data. Very good overall agreement with available scattering data is obtained
and the resulting scattering length is compared with the new accurate kaonic
hydrogen data from DEAR. The pole structures of the obtained fits to experiment
are critically examined.


title: New developments in the statistical approach of parton distributions

abstract:
  We recall how parton distributions are constructed in a statistical physical
picture of the nucleon. The chiral properties of QCD lead to strong relations
between quarks and antiquarks distributions and the importance of the Pauli
exclusion principle is also emphasized. A global next-to-leading order QCD
analysis of unpolarized and polarized deep-inelastic scattering data allows to
determine a small number of free parameters. Some predictions are compared to
recent experimental results and we discuss the prospects of this physical
framework.


title: D_{sJ}(2860) as the first radial excitation of the D_{s0}^*(2317)

abstract:
  A coupled-channel model previously employed to describe the narrow
$D_{s0}^*$(2317) and broad $D_0^*$(2400) charmed scalar mesons is generalized
so as to include all ground-state pseudoscalar-pseudoscalar and vector-vector
two-meson channels. All parameters are chosen fixed at published values, except
for the overall coupling constant, which is fine-tuned to reproduce the
$D_{s0}^*$(2317) mass. Thus, the radial excitations $D_{s0}^*$(2850) and
$D_0^*$(2740) are predicted, both with a width of about 50 MeV. The former
state appears to correspond to the new $D_{sJ}$(2860) resonance decaying to
$DK$ announced by BABAR in the course of this work. Also the $D_0^*$(2400)
resonance is roughly reproduced, though perhaps with a somewhat too low central
resonance peak.


title: Future neutrino oscillation facilities

abstract:
  The recent discovery that neutrinos have masses opens a wide new field of
experimentation. Accelerator-made neutrinos are essential in this program.
Ideas for future facilities include high intensity muon neutrino beams from
pion decay (`SuperBeam'), electron neutrino beams from nuclei decays (`Beta
Beam'), or muon and electron neutrino beams from muon decay (`Neutrino
Factory'), each associated with one or several options for detector systems.
Each option offers synergetic possibilities, e.g. some of the detectors can be
used for proton decay searches, while the Neutrino Factory is a first step
towards muon colliders.
  A summary of the perceived virtues and shortcomings of the various options,
and a number of open questions are presented.


title: Spontaneous parity violation and minimal Higgs models

abstract:
  In this paper we present a model for the spontaneous breaking of parity with
two Higgs doublets and two neutral Higgs singlets which are even and odd under
D-parity. The condition $ v_R >>v_L $ can be satisfied without introducing
bidoublets and it is induced by the breaking of D-parity through the vacuum
expectation value of the odd Higgs singlet. Examples of left-right symmetric
and mirror fermions models in grand unified theories are presented.


title:
Analysis of pion elliptic flows and HBT interferometry in a granular
  quark-gluon plasma droplet model

abstract:
  In many simulations of high-energy heavy-ion collisions on an event-by-event
analysis, it is known that the initial energy density distribution in the
transverse plane is highly fluctuating. Subsequent longitudinal expansion will
lead to many longitudinal tubes of quark-gluon plasma which have tendencies to
break up into many spherical droplets because of sausage instabilities. We are
therefore motivated to use a model of quark-gluon plasma granular droplets that
evolve hydrodynamically to investigate pion elliptic flows and
Hanbury-Brown-Twiss interferometry. We find that the data of pion transverse
momentum spectra, elliptic flows, and HBT radii in \sqrt{s_{NN}}=200 GeV Au +
Au collisions at RHIC can be described well by an expanding source of granular
droplets with an anisotropic velocity distribution.


title:
Associated production of a light pseudoscalar Higgs boson with a
  chargino pair in the NMSSM

abstract:
  In the next-to-minimal supersymmetric standard model (NMSSM), the unique
$\lambda S H_u H_d$ in the superpotential gives rise to a coupling involving
the lighter pseudoscalar Higgs boson and a pair of charged or neutral
Higgsinos, even in the limit of zero mixing between the two pseudoscalar Higgs
bosons. We study the associated production of a very light pseudoscalar Higgs
boson with a pair of charginos. The novel signature involves a pair of charged
leptons from chargino decays and a pair of photons from the pseudoscalar Higgs
boson decay, plus large missing energy at the LHC and ILC. The signal may help
us to distinguish the NMSSM from MSSM, provided that the experiment can resolve
the two photons from the decay of the pseudoscalar Higgs boson.


title: Operator Product Expansion in the Production and Decay of the X(3872)

abstract:
  The X(3872) seems to be a weakly-bound hadronic molecule whose constituents
are two charm mesons. Its binding energy is much smaller than all the other
energy scales in QCD. This separation of scales can be exploited through
factorization formulas for production and decay rates of the X. In a low-energy
effective field theory for the constituents of the X, the factorization
formulas can be derived using the operator product expansion. The derivations
are carried out explicitly for the simplest effective theory in which the
constituents interact through a contact interaction that produces a large
scattering length. The long-distance factors in the operator product expansions
for various observables are calculated nonperturbatively in the interaction
strength of the contact interaction. After renormalization of the coupling
constant, all remaining ultraviolet divergences can be absorbed into the
short-distance factors in the operator product expansions.


title:
Lepton flavour violation in future linear colliders in the long-lived
  stau NLSP scenario

abstract:
  We analyze the prospects of observing lepton flavour violation in future e-e-
and e+e- linear colliders in scenarios where the gravitino is the lightest
supersymmetric particle, and the stau is the next-to-lightest supersymmetric
particle. The signals consist of multilepton final states with two heavily
ionizing charged tracks produced by the long-lived staus. The Standard Model
backgrounds are very small and the supersymmetric backgrounds can be kept well
under control by the use of suitable kinematical cuts. We discuss in particular
the potential of the projected International Linear Collider to discover lepton
flavour violation in this class of scenarios, and we compare the estimated
sensitivity with the constraints stemming from the non-observation of rare
decays.


title: Heavy-Quark Diffusion, Flow and Recombination at RHIC

abstract:
  We discuss recent developments in assessing heavy-quark interaction in the
Quark-Gluon Plasma (QGP). While induced gluon radiation is expected to be the
main energy-loss mechanism for fast-moving quarks, we focus on elastic
scattering which prevails toward lower energies, evaluating both perturbative
(gluon-exchange) and nonperturbative (resonance formation) interactions in the
QGP. The latter are treated within an effective model for D- and B-meson
resonances above T_c as motivated by current QCD lattice calculations.
Pertinent diffusion and drag constants, following from a Fokker-Planck
equation, are implemented into an expanding fireball model for Au-Au collisions
at RHIC using relativistic Langevin simulations. Heavy quarks are hadronized in
a combined fragmentation and coalescence framework, and resulting
electron-decay spectra are compared to recent RHIC data. A reasonable
description of both nuclear suppression factors and elliptic flow up to momenta
of ~5 GeV supports the notion of a strongly interacting QGP created at RHIC.
Consequences and further tests of the proposed resonance interactions are
discussed.


title:
p p -> j j e+/- mu+/- nu nu and j j e+/- mu-/+ nu nu at O(\alpha_{em}^6)
  and O(\alpha_{em}^4 \alpha_s^2) for the Study of the Quartic Electroweak
  Gauge Boson Vertex at LHC

abstract:
  We analyze the potential of the CERN Large Hadron Collider (LHC) to study the
structure of quartic vector-boson interactions through the pair production of
electroweak gauge bosons via weak boson fusion q q -> q q W W. In order to
study these couplings we have performed a partonic level calculation of all
processes p p -> j j e+/- mu+/- nu nu and pp -> j j e+/- mu-/+ nu nu at the LHC
using the exact matrix elements at O(\alpha_{em}^6) and O(\alpha_{em}^4
\alpha_s^2) as well as a full simulation of the t tbar plus 0 to 2 jets
backgrounds. A complete calculation of the scattering amplitudes is necessary
not only for a correct description of the process but also to preserve all
correlations between the final state particles which can be used to enhance the
signal. Our analyses indicate that the LHC can improve by more than one order
of magnitude the bounds arising at present from indirect measurements.


title: Optimization of a neutrino factory oscillation experiment

abstract:
  We discuss the optimization of a neutrino factory experiment for neutrino
oscillation physics in terms of muon energy, baselines, and oscillation
channels (gold, silver, platinum). In addition, we study the impact and
requirements for detector technology improvements, and we compare the results
to beta beams. We find that the optimized neutrino factory has two baselines,
one at about 3000 to 5000km, the other at about 7500km (``magic'' baseline).
The threshold and energy resolution of the golden channel detector have the
most promising optimization potential. This, in turn, could be used to lower
the muon energy from about 50GeV to about 20GeV. Furthermore, the inclusion of
electron neutrino appearance with charge identification (platinum channel)
could help for large values of \sin^2 2 \theta_{13}. Though tau neutrino
appearance with charge identification (silver channel) helps, in principle, to
resolve degeneracies for intermediate \sin^2 2 \theta_{13}, we find that
alternative strategies may be more feasible in this parameter range. As far as
matter density uncertainties are concerned, we demonstrate that their impact
can be reduced by the combination of different baselines and channels. Finally,
in comparison to beta beams and other alternative technologies, we clearly can
establish a superior performance for a neutrino factory in the case \sin^2 2
\theta_{13} < 0.01.


title: Quantum Corrections in Quintessence Models

abstract:
  We investigate the impact of quantum fluctuations on a light rolling
quintessence field from three different sources, namely, from a coupling to the
standard model and dark matter, from its self-couplings and from its coupling
to gravity. We derive bounds for time-varying masses from the change of vacuum
energy, finding \Delta m_e/m_e << 10^{-11} for the electron and \Delta m_p/m_p
<< 10^{-15} for the proton since redshift z~2, whereas the neutrino masses
could change of order one. Mass-varying dark matter is also constrained. Next,
the self-interactions are investigated. For inverse power law potentials, the
effective potential does not become infinitely large at small field values, but
saturates at a finite maximal value. We discuss implications for cosmology.
Finally, we show that one-loop corrections induce non-minimal gravitational
couplings involving arbitrarily high powers of the curvature scalar R,
indicating that quintessence entails modified gravity effects.


title: Determining the SUSY-QCD Yukawa Coupling

abstract:
  Among the firm predictions of softly broken supersymmetry is the identity of
gauge couplings and the corresponding Yukawa couplings between gauginos,
sfermions and fermions. In the event that a SUSY-like spectrum of new particles
is discovered at future colliders, a key follow-up will be to test these
relations experimentally. In detailed studies it has been found that the
SUSY-Yukawa couplings of the electroweak sector can be studied with great
precision at the ILC, but a similar analysis for the Yukawa coupling of the
SUSY-QCD sector is far more challenging. Here a first phenomenological study
for determining this coupling is presented, using a method which combines
information from LHC and ILC.


title: Flavor Changing Effects in Family Nonuniversal Z' Models

abstract:
  Flavor-changing and CP-violating interactions of Z' to fermions are generally
present in models with extra U(1) gauge symmetry that are string-inspired or
related to broken gauged family symmetry. We study the consequences of such
couplings in fermion electric dipole moments, muon g-2, and K and B meson
mixings. From experimental limits or measured values, we constrain the
off-diagonal Z' couplings to fermions. Some of these constraints are comparable
or stronger than the existing constraints obtained from other observables.


title: Towards the robustness of the Affleck-Dine baryogenesis

abstract:
  We study the Affleck-Dine mechanism with various types of the Kahler
potential, and investigate whether or not the Affleck-Dine field could acquire
a large VEV as an initial condition for successful baryogenesis. In addition to
a negative Hubble-induced mass term, we find that large enough Hubble-induced
A-terms could also develop the minimum at large amplitude of the field.
Therefore, the Affleck-Dine mechanism works for broader classes of the
theories.


title: On the Temperature-Dependence of Quarkonia Correlators

abstract:
  Here I review the temperature-dependence of heavy quarkonia correlators in
potential models with three different screened potentials, and compare these to
the results from lattice QCD. None of the potentials investigated yield results
consistent with the lattice data, indicating that screening is likely not the
mechanism for heavy quarkonia suppression. I also discuss a simple toy model,
not based on temperature-dependent screening, that can reproduce the lattice
results.


title: SUSY breaking based on Abelian gaugino kinetic term mixings

abstract:
  We present a SUSY breaking scenario based on Abelian gaugino kinetic term
mixings between hidden and observable sectors. If an extra U(1) gaugino in the
observable sector obtains a large mass through this mixing effect based on SUSY
breaking in the hidden sector, soft SUSY breaking parameters in the MSSM may be
affected by radiative effects due to this gaugino mass. New phenomenological
aspects are discussed in such a SUSY breaking scenario.


title: Nuclear Broadening of Transverse Momentum in Drell-Yan Reactions

abstract:
  Data for Drell-Yan (DY) processes on nuclei are currently available from
fixed target experiments up to the highest energy of $\sqrt{s}=40\GeV$. The
bulk of the data cover the range of short coherence length, where the
amplitudes of the DY reaction on different nucleons do not interfere. In this
regime, DY processes provide direct information about broadening of the
transverse momentum of the projectile parton experiencing initial-state
multiple interactions. We revise a previous analysis of data from the E772
experiment and perform a new analysis of broadening including data from the
E866 experiment at Fermilab. We conclude that the observed broadening is about
twice as large as the one found previously. This helps to settle controversies
that arose from a comparison of the original determination of broadening with
data from other experiments and reactions.


title:
Non-thermal leptogenesis and baryon asymmetry in different neutrino mass
  models

abstract:
  In the present work we study non-thermal leptogenesis and baryon asymmetry in
the universe in different neutrino mass models discussed recently. For each
model we obtain a formula relating the reheating temperature after inflation to
the inflaton mass. It is shown that all but four cases are excluded and that in
the cases which survive the inflaton mass and the reheating temperature after
inflation are bounded from below and from above.


title: Dynamical Breaking of the Electroweak Theory

abstract:
  Dynamical breaking of the electroweak theory, i.e. technicolor, is an
intriguing extension of the Standard Model. Recently new models have been
proposed featuring walking dynamics for a very low number of techniflavors.
These technicolor extensions are not ruled out by current precision
measurements. Here I first motivate the idea of dynamical electroweak symmetry
breaking and then summarize some of the properties of the recent models and
their possible cosmological implications.


title: Dynamical GUT breaking and mu-term driven supersymmetry breaking

abstract:
  Models for dynamical breaking of supersymmetric grand unified theories are
presented. The doublet-triplet splitting problem is absent since the Higgs
doublet superfields can be identified with the massless mesons of the strong
gauge group whereas there are no massless states corresponding to the colored
Higgs fields. Various strong gauge groups SU(Nc), Sp(Nc) and SO(Nc) are
examined. In a model with SO(9) strong gauge group, adding the mu-term for the
Higgs fields triggers to break supersymmetry in a meta-stable vacuum. The
pattern of the supersymmetry breaking parameters is predicted to be the
gauge-mediation type with modifications in the Higgs sector.


title:
$B_s - \bar B_s$ Mixing and Its Implication for $b \to s$ Transitions in
  Supersymmetry

abstract:
  We investigate the effect of the current measurement of the neutral $B_s$
meson mass difference, $\Delta M_{B_s}$, on SUGRA models which have non-zero
values of the soft breaking terms $(m^2_{LL,RR})_{23}$ and $A^{u,d}_{23}$ at
the GUT scale. We use non-zero values of these parameter to explain the $B\to
K\pi$ puzzle and find that even after satisfying the experimental result on
$\Delta M_{B_s}$ and the branching ratio (BR) of $b\to s\gamma$ we still can
explain the puzzle. Further we show that in this parameter space it is possible
to accommodate the large BR of $B\to \eta' K$ and the current experimental data
for CP asymmetries of $B\to \eta' K^0$ and $B\to \phi K^0$. The predicted value
of $\sin (2\beta^{\rm eff})_{\eta' K^0}$ is about $0.52-0.67$.


title:
Nonlinear dynamics of soft fermion excitations in hot QCD plasma II:
  Soft-quark - hard-particle scattering and energy losses

abstract:
  In general line with our first work [Yu.A. Markov, M.A. Markova, Nucl. Phys.
A 770 (2006) 162] within the framework of semiclassical approximation a general
theory for the scattering processes of soft (anti)quark excitations off hard
thermal particles in hot QCD-medium is thoroughly considered. The dynamical
equations describing evolution for the usual classical color charge $Q^a(t)$
and Grassmann color charges $\theta^i(t), \theta^{\dagger i}(t)$ of hard
particle taking into account the soft fermion degree of freedom of the system
are suggested. On the basis of these equations and the Blaizot-Iancu equations
iterative procedure of calculation of effective currents and sources generating
the scattering processes under consideration is defined and their form up to
third order in powers of free soft quark field, soft gluon one, and initial
values of the color charges of hard particle is explicitly calculated. With use
of the generalized Tsytovich principle a connection between matrix elements of
the scattering processes and the effective currents and sources is established.
In the context of the effective theory suggested for soft and hard fermion
excitations new mechanisms of energy losses of high-energy parton propagating
through QCD-medium are considered.


title:
Verification of bootstrap conditions for amplitudes with quark exchanges
  in QMRK

abstract:
  The compatibility of the multi--Regge form of QCD amplitudes in the
quasi--multi--Regge kinematics (QMRK) and the s--channel unitarity imposes some
constraints on the effective jet--production vertices. We demonstrate that
these constraints known as bootstrap conditions are satisfied for the
amplitudes with the Reggeized quark exchanges.


title:
Improved Analysis of J/psi Decays into a Vector Meson and Two
  Pseudoscalars

abstract:
  Recently, the BES collaboration has published an extensive partial wave
analysis of experimental data on J/psi -> phi pi+pi-, J/psi -> omega pi+pi-,
J/psi -> phi K+K- and J/psi -> omega K+K-. These new results are analyzed here,
with full account of detection efficiencies, in the framework of a chiral
unitary description with coupled-channel final state interactions between pi-pi
and K-bar K pairs. The emission of a dimeson pair is described in terms of the
strange and nonstrange scalar form factors of the pion and the kaon, which
include the final state interaction and are constrained by unitarity and by
matching to the next-to-leading-order chiral expressions. This procedure allows
for a calculation of the S-wave component of the dimeson spectrum including the
f_0(980) resonance, and for an estimation of the low-energy constants of Chiral
Perturbation Theory, in particular the large N_c suppressed constants L_4^r and
L_6^r. The decays in question are also sensitive to physics associated with OZI
violation in the 0++ channel. It is found that the S-wave contributions to phi
pi+pi-, phi K+K- and omega pi+pi- given by the BES partial-wave analysis may be
very well fitted up to a dimeson center-of-mass energy of ~1.2 GeV, for a large
and positive value of L_4^r and a value of L_6^r compatible with zero. An
accurate determination of the amount of OZI violation in the J/psi -> phi
pi+pi- decay is achieved, and the S-wave contribution to omega K+K- near
threshold is predicted.


title:
Supersymmetry with Small mu: Connections between Naturalness, Dark
  Matter, and (Possibly) Flavor

abstract:
  Weak scale supersymmetric theories often suffer from several naturalness
problems: the problems of reproducing the correct scale for electroweak
symmetry breaking, the correct abundance for dark matter, and small rates for
flavor violating processes. We argue that the first two problems point to
particular regions of parameter space in models with weak scale supersymmetry:
those with a small mu term. This has an interesting implication on direct dark
matter detection experiments. We find that, if the signs of the three gaugino
mass parameters are all equal, we can obtain a solid lower bound on the
spin-independent neutralino-nucleon cross section, \sigma. In the case that the
gaugino masses satisfy the unified mass relations, we obtain \sigma > 4 x
10^{-46} cm^2 (1 x 10^{-46} cm^2) for fine-tuning in electroweak symmetry
breaking no worse than 10% (5%). We also discuss a possibility that the three
problems listed above are all connected to the hierarchy of fermion masses.
This occurs if supersymmetry breaking and electroweak symmetry breaking (the
Higgs fields) are coupled to matter fields with similar hierarchical
structures. The discovery of mu -> e transition processes in near future
experiments is predicted in such a framework.


title:
A Comprehensive Analysis on the Pion-Photon Transition Form Factor
  Beyond the Leading Fock State

abstract:
  We perform a comprehensive analysis of the pion-photon transition form factor
$F_{\pi \gamma}(Q^2)$ involving the transverse momentum corrections with the
present CLEO experimental data, in which the contributions beyond the leading
Fock state have been taken into consideration. As is well-known, the leading
Fock-state contribution dominates of $F_{\pi \gamma}(Q^2)$ at large momentum
transfer ($Q^2$) region. One should include the contributions beyond the
leading Fock state in small $Q^2$ region. In this paper, we construct a
phenomenological expression to estimate the contributions beyond the leading
Fock state based on its asymptotic behavior at $Q^2\to0$. Our present
theoretical results agree well with the experimental data in the whole $Q^2$
region. Then, we extract some useful information of the pionic leading twist-2
distribution amplitude (DA) by comparing our results of $F_{\pi \gamma}(Q^2)$
with the CLEO data. By taking best fit, we have the DA moments,
$a_2(\mu_0^2)=0.002^{+0.063}_{-0.054}$, $a_4(\mu_0^2)=-0.022_{-0.012}^{+0.026}$
and all of higher moments, which are closed to the asymptotic-like behavior of
the pion wavefunction.


title:
Analysis of four-wave mixing of high-power lasers for the detection of
  elastic photon-photon scattering

abstract:
  We derive expressions for the coupling coefficients for electromagnetic
four-wave mixing in the non-linear quantum vacuum. An experimental setup for
detection of elastic photon-photon scattering is suggested, where three
incoming laser pulses collide and generate a fourth wave with a new frequency
and direction of propagation. An expression for the number of scattered photons
is derived and, using beam parameters for the Astra Gemini system at the
Rutherford Appleton Laboratory, it is found that the signal can reach
detectable levels. Problems with shot-to-shot reproducibility are reviewed, and
the magnitude of the noise arising from competing scattering processes is
estimated. It is found that detection of elastic photon-photon scattering may
for the first time be achieved.


title:
Elliptic Inflation: Generating the curvature perturbation without
  slow-roll

abstract:
  There are many inflationary models in which inflaton field does not satisfy
the slow-roll condition. However, in such models, it is always difficult to
generate the curvature perturbation during inflation. Thus, to generate the
curvature perturbation, one must introduce another component to the theory. To
cite a case, curvatons may generate dominant part of the curvature perturbation
after inflation. However, we have a question whether it is unrealistic to
consider the generation of the curvature perturbation during inflation without
slow-roll. Assuming multi-field inflation, we encounter the generation of the
curvature perturbation during inflation without slow-roll. The potential along
equipotential surface is flat by definition and thus we do not have to worry
about symmetry. We also discuss about KKLT models, in which corrections lifting
the inflationary direction may not become a serious problem if there is a
symmetry enhancement at the tip (not at the moving brane) of the inflationary
throat.


title:
Flavor changing neutral decay effects in models with two Higgs boson
  doublets: Applications to LHC Physics

abstract:
  In this Thesis we have investigated some effects appearing in top quark and
Higgs boson decays with flavor changing neutral currents (FCNC) in the
framework of generic Two Higgs Doblet Models (2HDM) and the Minimal
Supersymmetric Standard Model (MSSM). We have applied these two extensions to
the SM to see whether they can produce new FCNC effects. Introductory chapters
deal with the 2HDM and the MSSM. In the next chapters we have computed the
following FCNC decays: (1) the branching ratios (B) of the top quark to Higgs
bosons and charm quark in the 2HDM; (2) B and number of events at the Large
Hadron Collider (LHC) of the Higgs bosons to top and charm quarks in the 2HDM;
(3) B of the Higgs bosons to bottom and strange quarks in the MSSM; (4) cross
section and number of events at the LHC of the Higgs bosons to FCNC final
states involving the heavy quarks like the top and bottom quark in the MSSM
(Higgs bosons = h^0, H^0, A^0). We also studied the experimental signatures
that would allow discover of the nature of these Higgs bosons in the LHC. In
this study we have applied the severe restrictions from observed low-energy
FCNC processes like b -> s\gamma. Our general conclusion is that the physics of
the processes with flavor changing neutral currents can be very important in
seeing the physics beyond the Standard Model and to disentangle the nature of
the most adequate model. Experiments at the LHC can be crucial to unravel signs
of FCNC physics beyond the SM.


title: Bulk Mass Effects in Gauge-Higgs Unification at Finite Temperature

abstract:
  We study the bulk mass effects on the electroweak phase transition at finite
temperature in a five dimensional SU(3) gauge-Higgs unification model on an
orbifold. We investigate whether the Higgs mass satisfying the experimental
lower bound can be compatible with the strong first order phase transition
necessary for a successful electroweak baryogenesis. Our numerical results show
that the above statement can be realized by matter with bulk mass yielding a
viable Higgs mass. We also find an interesting case where the heavier Higgs
gives the stronger first order phase transition.


title: Relating leptogenesis and dark matter

abstract:
  A scenario that relates the abundance of dark matter to the baryon asymmetry
of the Universe is presented. In this scenario, based on a left-right extension
of the Standard Model, dark matter is made of light, ~ 1 GeV, right-handed
Majorana neutrinos.


title: Angular distributions in three-body baryonic B decays

abstract:
  We study the angular distributions of the baryon-antibaryon low-mass
enhancements in the three-body baryonic B decays of $B\to p\bar{p}M$ (M=K and
$\pi$) in the framework of the perturbative QCD. By writing the most general
forms for the transition form factors of $B\to p\bar{p}$, we find that the
angular distribution asymmetry in $B^-\to p\bar{p}K^-$ measured by the Belle
Collaboration can be explained. We give a quantitative description on the
Dalitz plot asymmetry in $B^-\to p\bar{p}K^-$ shown by the BaBar Collaboration
and demonstrate that it is equivalent to the angular asymmetry. In addition, we
present our results on $\bar B^0\to p\bar{p}K_S$ and $B^-\to p\bar{p}\pi^-$ and
we obtain that their angular asymmetries are $-0.35\pm0.11$ and $0.45\pm0.10$,
respectively, which can be tested by the ongoing experiments at the B
factories.


title:
Can four-zero-texture mass matrix model reproduce the observed quark and
  lepton mixing angles and CP violating phases?

abstract:
  We reconsider an universal mass matrix model which has a seesaw-invariant
structure with four-zero texture common to all quarks and leptons. The CKM
quark and MNS lepton mixing matrices of the model are analyzed analytically.We
show that the model can be consistent with all the experimental data of
neutrino oscillation and quark mixings by tuning free parameters of the model.
It is also shown that the model predicts a relatively large value for (1,3)
element of the MNS lepton mixing matrix, |(U_{MNS})_{13}|^2 \simeq 2.6 \times
10^{-2}. Using the seesaw mechanism, we also discuss the conditions for the
components of the Dirac and the right-handed Majorana neutrino mass matrices
which lead to the neutrino mass matrix consistent with the experimental data.


title:
Mapping String States into Partons: Form Factors and the Hadron Spectrum
  in AdS/QCD

abstract:
  New developments in holographic QCD are described in this talk in the context
of the correspondence between string states in AdS and light-front
wavefunctions of hadronic states in physical space-time.


title: Post--Sphaleron Baryogenesis

abstract:
  We present a new mechanism for generating the baryon asymmetry of the
universe directly in the decay of a singlet scalar field $S_r$ with a weak
scale mass and a high dimensional baryon number violating coupling. Unlike most
currently popular models, this mechanism, which becomes effective after the
electroweak phase transition, does not rely on the sphalerons for inducing a
nonzero baryon number. CP asymmetry in $S_r$ decay arises through loop diagrams
involving the exchange of $W^\pm$ gauge bosons, and is suppressed by light
quark masses, leading naturally to a value of $\eta_B \sim 10^{-10}$. We show
that the simplest realization of this mechanism, which uses a six quark $\Delta
B=2$ operator, predicts colored scalars accessible to the LHC, and
neutron--antineutron oscillation within reach of the next generation
experiments.


title: W-boson production with large transverse momentum at the LHC

abstract:
  We study W-boson production with large transverse momentum, Q_T, in pp
collisions at the LHC. We calculate the complete NLO corrections and the
soft-gluon NNLO corrections to the differential cross section. The NLO
corrections are large but they do not reduce the scale dependence relative to
LO, while the NNLO soft-gluon corrections, although small, significantly reduce
the scale dependence and thus provide a more stable result.


title: The discovery of the fourth family at the LHC: what if?

abstract:
  The first evidence of new strong interactions may be a sufficiently massive
fourth family observed at the LHC. The fourth family masses, of the leptons in
particular, are constrained by the electroweak precision data, and this leads
to signatures at the LHC that may imply early discovery. We study the
implications of this discovery from a bottom-up perspective, where effective
4-fermion operators model the dominant effects of the new dynamics. We identify
simple approximate symmetries of these operators that may be required for
realistic masses of the third and fourth families. The large top mass for
instance is related to the structure of these operators.


title: Heavy Quarkonia and Quark Drip Lines in Quark-Gluon Plasma

abstract:
  Using the potential model and thermodynamical quantities obtained in lattice
gauge calculations, we determine the spontaneous dissociation temperatures of
color-singlet quarkonia and the `quark drip lines' which separate the region of
bound $Q\bar Q$ states from the unbound region. The dissociation temperatures
of $J/\psi$ and $\chi_b$ in quenched QCD are found to be 1.62$T_c$ and
$1.18T_c$ respectively, in good agreement with spectral function analyses. The
dissociation temperature of $J/\psi$ in full QCD with 2 flavors is found to be
1.42$T_c$. For possible bound quarkonium states with light quarks, the
characteristics of the quark drip lines severely limit the stable region close
to the phase transition temperature. Bound color-singlet quarkonia with light
quarks may exist very near the phase transition temperature if their effective
quark mass is of the order of 300-400 MeV and higher.


title: Fit to Electroweak Precision Data

abstract:
  A brief review of electroweak precision data from LEP, SLC, the Tevatron, and
low energies is presented. The global fit to all data including the most recent
results on the masses of the top quark and the W boson reinforces the
preference for a relatively light Higgs boson. I will also give an outlook on
future developments at the Tevatron Run II, CEBAF, the LHC, and the ILC.


title:
Two Photon Exchange Contributions to Elastic ep Scattering in the
  Nonlocal Field Formalism

abstract:
  We construct a nonlocal gauge invariant Lagrangian to model the
electromagnetic interaction of proton. The Lagrangian includes all allowed
operators with dimension up to five. We compute the two photon exchange
contribution to elastic electron-proton scattering using this effective
nonlocal Lagrangian. The one loop calculation in this model includes the
standard box and cross box diagram with the standard on-shell form of the
hadron electromagnetic vertices. Besides this we find an extra contribution
which depends on an unknown constant. We use experimentally extracted form
factors for our calculation. We find that the correction to the reduced cross
section is slightly nonlinear as a function of the photon longitudinal
polarization $\epsilon$. The non-linearity seen is within the experimental
error bars of the Rosenbluth data. The final result completely explains the
difference between the form factor ratio $G_E/G_M$ extracted by Rosenbluth
separation technique at SLAC and polarization transfer technique at JLAB.


title: LFV and FCNC in a large tan beta SUSY-seesaw

abstract:
  Realistic predictions are made for lepton flavour violating and flavour
changing neutral current decays in the large tan beta regime of a SUSY-seesaw
model. Lepton flavour violating neutral Higgs decays are discussed within this
framework along with the highly constraining charged lepton decays l_i --> l_j
+ gamma. In the b-s system the important constraint from b --> s + gamma is
studied in conjunction with the rare FCNC Bs --> mu mu (tau mu) decays and the
recently measured Delta Ms.


title: Reactor Neutrino Experiments with a Large Liquid Scintillator Detector

abstract:
  We discuss several new ideas for reactor neutrino oscillation experiments
with a Large Liquid Scintillator Detector. We consider two different scenarios
for a measurement of the small mixing angle $\theta_{13}$ with a mobile
$\bar{\nu}_e$ source: a nuclear-powered ship, such as a submarine or an
icebreaker, and a land-based scenario with a mobile reactor. The former setup
can achieve a sensitivity to $\sin^2 2\theta_{13} \lesssim 0.003$ at the 90%
confidence level, while the latter performs only slightly better than Double
Chooz. Furthermore, we study the precision that can be achieved for the solar
parameters, $\sin^2 2\theta_{12}$ and $\Delta m_{21}^2$, with a mobile reactor
and with a conventional power station. With the mobile reactor, a precision
slightly better than from current global fit data is possible, while with a
power reactor, the accuracy can be reduced to less than 1%. Such a precision is
crucial for testing theoretical models, e.g. quark-lepton complementarity.


title: Phenomenology Beyond the Standard Model

abstract:
  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: Introduction to extra dimensions

abstract:
  The aim of this talk is to provide non-experts with a brief and elementary
introduction on the field of extra dimensions. The main motivation for extra
dimensions relies on the more fundamental string theories that predict ten (or
eleven) space-time dimensions. Extra dimensions must be compactified and there
appear branes where gauge and/or gravity propagates. Compactification relates
string constants (string scale and string coupling) with four-dimensional
constants (Planck scale and gauge coupling). Only gravity can propagate in
dimensions transverse to the brane. They can be detected either by
gravitational (table-top) or by collider experiments where Kaluza-Klein
graviton production appears as missing energy. Transverse dimensions can be as
large as the sub-millimeter. Ordinary matter can also propagate in dimensions
parallel to the brane. It can give rise to bumps in the dilepton invariant mass
in hadron colliders or contribute by indirect effects to the electroweak
observables. Longitudinal dimensions can be probed at LHC up to a scale of 6.7
TeV (9 TeV) for one (two) extra dimension(s). Extra dimensions also give rise
to new theoretical ideas related to supersymmetry and electroweak breaking.
Some of these ideas are reviewed.


title:
Global three-parameter model for neutrino oscillations using Lorentz
  violation

abstract:
  A model of neutrino oscillations is presented that has only three degrees of
freedom and is consistent with existing data. The model is a subset of the
renormalizable sector of the Standard-Model Extension (SME), and it offers an
alternative to the standard three-neutrino massive model. All classes of
neutrino data are described, including solar, reactor, atmospheric, and LSND
oscillations. The disappearance of solar neutrinos is obtained without
matter-enhanced oscillations. Quantitative predictions are offered for the
ongoing MiniBooNE experiment and for the future experiments OscSNS, NOvA, and
T2K.


title:
Two-photon exchange model for production of neutral meson pairs in e+e-
  annihilation

abstract:
  A vector-dominance two-photon exchange model is proposed to explain the
recently observed production of $\rho^0\rho^0$ and $\rho^0\phi$ pairs in
$e^+e^-$ annihilation at 10.58 GeV with the BaBar detector. All the observed
features of the data --angular and decay distributions, rates-- are in
agreement with the model. Predictions are made for yet-unobserved final states.


title:
Low scale gravity mediation with warped extra dimension and collider
  phenomenology on the hidden sector

abstract:
  We propose a scenario of gravity mediated supersymmetry breaking (gravity
mediation) in a supersymmetric Randall-Sundrum model. In our setup, both of the
visible sector and the hidden sector co-exist on the infrared (IR) brane. We
introduce the Polonyi model as a simple hidden sector. Due to the warped
metric, the effective cutoff scale on the IR brane is ``warped down'', so that
the gravity mediation occurs at a low scale. As a result, the gravitino is
naturally the lightest superpartner (LSP) and contact interactions between the
hidden and the visible sector fields become stronger. We address
phenomenologies for various IR cutoff scales. In particular, we investigate
collider phenomenology involving a scalar field (Polonyi field) in the hidden
sector for the case with the IR cutoff around 10 TeV. We find a possibility
that the hidden sector scalar can be produced at the LHC and the International
Linear Collider (ILC). Interestingly, the scalar behaves like the Higgs boson
of the standard model in the production process, while its decay process is
quite different and, once produced, it will provide us with a very clean
signature. The hidden sector may be no longer hidden.


title:
Color Superconductivity in Dense, but not Asymptotically Dense, Quark
  Matter

abstract:
  At ultra-high density, matter is expected to form a degenerate Fermi gas of
quarks in which there is a condensate of Cooper pairs of quarks near the Fermi
surface: color superconductivity. In this chapter we review some of the
underlying physics, and discuss outstanding questions about the phase structure
of ultra-dense quark matter. We then focus on describing recent results on the
crystalline color superconducting phase that may be the preferred form of cold,
dense but not asymptotically dense, three-flavor quark matter. The gap
parameter and free energy for this phase have recently been evaluated within a
Ginzburg-Landau approximation for many candidate crystal structures. We
describe the two that are most favorable. The robustness of these phases
results in their being favored over wide ranges of density. However, it also
implies that the Ginzburg-Landau approximation is not quantitatively reliable.
We describe qualitative insights into what makes a crystal structure favorable
which can be used to winnow the possibilities. We close with a look ahead at
the calculations that remain to be done in order to make quantitative contact
with observations of compact stars.

categories: hep-ph astro-ph cond-mat.supr-con nucl-th


title: CKM pattern from localized Generations in Extra Dimension

abstract:
  We revisit the issue of the quark masses and mixing angles in the framework
of large extra dimension. We consider three identical standard model families
resulting from higher-dimensional fields localized on different branes embedded
in a large extra dimension. Furthermore we use a decaying profile in the bulk
different form previous works. With the Higgs field also localized on a
different brane, the hierarchy of masses between the families results from
their different positions in the extra space. When the left-handed doublet and
the right-handed singlets are localized with different couplings on the branes,
we found a set of brane locations in one extra dimension which leads to the
correct quark masses and mixing angles with the sufficient strength of
CP-violation. We see that the decaying profile of the Higgs field plays a
crucial role for producing the hierarchies in a rather natural way.


title:
Title On the origin of families of fermions and their mass matrices -
  Approximate analyses of properties of four families within approach unifying
  spins and charges

abstract:
  The approach unifying all the internal degrees of freedom - proposed by one
of us - is offering a new way of understanding families of quarks and leptons.
Spinors, namely, living in d(=1+13)-dimensional space, manifest in the observed
d(=1+3) space all the known charges of quarks and leptons, while a part of the
starting Lagrange density in d(=1+13) transforms the right handed quarks and
leptons into the left handed ones, manifesting a mass term in $d=1+3$. Since a
spinor carries two kinds of spins and interacts accordingly with two kinds of
the spin connection fields, the approach predicts families and the
corresponding Yukawa couplings. In the previous paper the appearance of
families of quarks and leptons within this approach was investigated and the
explicit expressions for the corresponding Yukawa couplings, following from the
approach after some approximations and simplifications, presented. In this
paper we continue investigations of this new way of presenting families of
quarks and leptons by further analyzing properties of mass matrices, treating
quarks and leptons in an equivalent way. We connect free parameters of the
approach with the known experimental data and investigate a possibility that
the fourth family of quarks and leptons appears at low enough energies to be
observable with the new generation of accelerators.


title: Fermionic Collective Modes of an Anisotropic Quark-Gluon Plasma

abstract:
  We determine the fermionic collective modes of a quark-gluon plasma which is
anisotropic in momentum space. We calculate the fermion self-energy in both the
imaginary- and real-time formalisms and find that numerically and analytically
(for two special cases) there are no unstable fermionic modes. In addition we
demonstrate that in the hard-loop limit the Kubo-Martin-Schwinger condition,
which relates the off-diagonal components of the real-time fermion self-energy,
holds even for the anisotropic, and therefore non-equilibrium, quark-gluon
plasma considered here. The results obtained here set the stage for the
calculation of the non-equilibrium photon production rate from an anisotropic
quark-gluon plasma.


title:
Open Problems in Hydrodynamical Approach to Relativistic Heavy Ion
  Collisions

abstract:
  We discuss some open problems in hydrodynamical approach to the relativistic
heavy ion collisions. In particular, we propose a new, very simple alternative
approach to the relativistic dissipative hydrodynamics of Israel and Stewart.


title: Theta in a conventional correlated perturbative chiral quark model

abstract:
  In a conventional covark model we constructed the Theta pentaquark wave
function using vector diquarks and calculating the mass spectrum of this exotic
pentaquark.


title:
Compatibility of CAST search with axion-like interpretation of PVLAS
  results

abstract:
  The PVLAS collaboration has results that may be interpreted in terms of a
light axion-like particle, while the CAST collaboration has not found any
signal of such particles. We propose a particle physics model with paraphotons
and with a low energy scale in which this apparent inconsistency is
circumvented.


title: New Results In Axion Physics

abstract:
  We comment on the recent experimental results from the PVLAS and CAST
collaborations that search for axion-like particles. We propose a particle
physics model in which their apparent inconsistency is circumvented.


title: Charged Lepton Flavor Physics and Extra Dimensions

abstract:
  We estimate the charged lepton electric dipole moments and the branching
ratios of radiative lepton flavor violating decays in the framework of the two
Higgs doublet model with the inclusion two extra dimensions. Here, we consider
that the new Higgs doublet is accessible to one of the extra dimensions with a
Gaussian profile and the fermions are accessible to the other extra dimension
with uniform zero mode profile. We observe that the numerical values of the
physical quantities studied enhance with the additional effects due to the
extra dimensions and they are sensitive to the new Higgs localization.


title: Hadron Spectroscopy in 2006

abstract:
  New results on hadron spectra have been appearing in abundance in the past
few years as a result of improved experimental techniques. These include
information on states made of both light quarks (u, d, and s) and with one or
more heavy quarks (c, b). The present review, dedicated to the memory of R. H.
Dalitz, treats light-quark states, glueballs, hybrids, charmed and beauty
particles, charmonium, and $b \bar b$ states. Some future directions are
mentioned.


title:
The Unitarity Triangle Fit in the Standard Model and Hadronic Parameters
  from Lattice QCD: A Reappraisal after the Measurements of Delta m_s and BR(B
  to tau nu)

abstract:
  The recent measurements of the B_s meson mixing amplitude by CDF and of the
leptonic branching fraction BR(B to tau nu) by Belle call for an upgraded
analysis of the Unitarity Triangle in the Standard Model. Besides improving the
previous constraints on the parameters of the CKM matrix, these new
measurements, combined with the recent determinations of the angles alpha, beta
and gamma from non-leptonic decays, allow, in the Standard Model, a quite
accurate extraction of the values of the hadronic matrix elements relevant for
K-Kbar and B_{s,d}-B_{s,d}bar mixing and of the leptonic decay constant f_B.
These values, obtained ``experimentally'', can then be compared with the
theoretical predictions, mainly from lattice QCD. In this paper we upgrade the
UT fit, we determine from the data the kaon B-parameter B_Khat, the B^0 mixing
amplitude parameters f_Bs B^{1/2}_Bs and xi, the decay constant f_B, and make a
comparison of the obtained values with lattice predictions. We also discuss the
different determinations of V_ub and show that current data do not favour the
value measured in inclusive decays.


title: Angularities and other shapes

abstract:
  I discuss soft-gluon resummation and power corrections for event shape
distributions, mostly in e+ e- annihilation. I consider specifically the
thrust, the C parameter, and the class of angularities, and show how
factorization techniques and dressed gluon exponentiation lead to predictive
models of power corrections that are firmly grounded in perturbative QCD. The
scaling rule for the shape function for angularities is derived as an example.
Finally, I make a few remarks on possible generalizations to hadron collisions,
and on their relevance to LHC studies.


title:
The Virtual Photon-Gluon Impact Factor with Massive Quarks and Exact
  Gluon Kinematics

abstract:
  We calculate the impact factor coupling a virtual photon to a gluon via a
massive quark-antiquark pair at LL order, but with the imposition of the
correct gluon kinematics. Exact analytical results are presented in triple
Mellin space with respect to scaled Bjorken x, gluon transverse momentum and
heavy quark mass. The application of these results to the calculation of
approximate NLL coefficient functions needed to relate structure functions to
the BFKL gluon is presented. The NLL effects with running coupling are seen to
lead to a suppression of the small x divergence when compared with the fixed
and running coupling LL results, but less than in the massless case.


title:
$\Upsilon$ radiative decays to light quark jets and color octet
  mechanism

abstract:
  We study radiative decays of $\Upsilon$ to light quark jets in
nonrelativistic QCD by taking both the color singlet and color octet $b\bar b$
operators into consideration. The cut for quark jet energy and cut for the
angle between two quark jets are introduced. The sensitivity to the soft and
collinear singularities in the loop integrals are greatly reduced by these
cuts. With the jet energy cut of about 1 GeV, and the jet angle cut of about
$36^\circ$, the branching ratio for $\Upsilon\to\gamma q\bar q$ is found to be
$8.2\times 10^{-4}$ from color singlet contributions. The color octet
contributions could be much larger than that of color singlet, depending on the
estimate of the color octet matrix elements. This process may provide a new
test for the color octet mechanism in nonrelativistic QCD.


title: Mass terms to break susy-like degeneration

abstract:
  We suggest a very simple but general operator to break mass degeneration
between representations of the Poincare group having spin 1 and 1/2. A quantity
very similar, at experimental 0.13 $\sigma$ level, to Weinberg's angle, appears
during the process.


title:
Flavor Changing Neutral Currents, an Extended Scalar Sector, and the
  Higgs Production Rate at the LHC

abstract:
  We study extensions of the standard model with additional colored scalar
fields which can couple directly to quarks. Natural suppression of flavor
changing neutral currents implies minimal flavor violation, and fixes the
scalars to transform as (8,2)_1/2 under the SU(3) X SU(2) X U(1) gauge
symmetry. We explore the phenomenology of the standard model with one
additional (8,2)_1/2 scalar, and discuss how this extension can modify flavor
physics and the Higgs boson production rate at the LHC. Custodial SU(2)
symmetry can be implemented for the octet scalars since they transform as a
real color representation. Additional weak scale degrees of freedom needed for
gauge unification are discussed.


title: The Landau Pole and $Z^{\prime}$ decays in the 331 bilepton model

abstract:
  We calculate the decay widths and branching ratios of the extra neutral boson
$Z^{\prime}$ predicted by the 331 bilepton model in the framework of two
different particle contents. These calculations are performed taken into
account oblique radiative corrections, and Flavor Changing Neutral Currents
(FCNC) under the ansatz of Matsuda as a texture for the quark mass matrices.
Contributions of the order of $10^{-1}-10^{-2}$ are obtained in the branching
ratios, and partial widths about one order of magnitude bigger in relation with
other non- and bilepton models are also obtained. A Landau-like pole arise at
3.5 TeV considering the full particle content of the minimal model (MM), where
the exotic sector is considered as a degenerated spectrum at 3 TeV scale. The
Landau pole problem can be avoid at the TeV scales if a new leptonic content
running below the threshold at $% 3 $ TeV is implemented as suggested by other
authors.


title:
Precise mass-dependent QED contributions to leptonic g-2 at order
  alpha^2 and alpha^3

abstract:
  Improved values for the two- and three-loop mass-dependent QED contributions
to the anomalous magnetic moments of the electron, muon, and tau lepton are
presented. The Standard Model prediction for the electron (g-2) is compared
with its most precise recent measurement, providing a value of the
fine-structure constant in agreement with a recently published determination.
For the tau lepton, differences with previously published results are found and
discussed. An updated value of the fine-structure constant is presented in
"Note added after publication."


title: On quark-lepton complementarity

abstract:
  Recent measurements of the neutrino solar mixing angle and the Cabibbo angle
satisfy the empirical relation theta_{sol} + theta_{C} ~ 45^{o}. This relation
suggests the existence of a correlation between the mixing matrices of leptons
and quarks, the so called quark-lepton complementarity. Here, we examine the
possibility that this correlation originates in the strong hierarchy in the
mass spectra of quarks and charged leptons, and the seesaw mechanism that gives
mass to the Majorana neutrinos. In a unified treatment of quarks and leptons in
which the mass matrices of all fermions have a similar Fritzsch texture, we
calculate the mixing matrices V_{CKM} and U_{MNSP} as functions of quark and
lepton masses and only two free parameters, in very good agreement with the
latest experimental values on masses and mixings. Three essential ingredients
to explain the quark-lepton complementarity relation are identified: the strong
hierarchy in the mass spectra of quarks and charged leptons, the normal seesaw
mechanism and the assumption of maximal CP violation in the lepton sector.


title: Self-interaction and mass in quantum field theory

abstract:
  Qualitative implications of electroweak theory are reconsidered on the
assumption that the unique source of fermion rest mass is self-interaction via
coupling to gauge fields. This implies small but nonzero mass for neutrinos,
and suggests that successive fermion generations are distinct coupled-field
eigenstates of a self-interaction mass operator. For a scalar Higgs field, this
mechanism can account for the SU(2) symmetry breaking of electroweak theory
without a biquadratic self-interaction. The implied Higgs particle mass could
be very small, eluding any search limited to heavy particles.


title:
Branching Ratio and CP Asymmetry of $B_s \to \pi^0 \eta^{(\prime)}$
  Decays in the perturbative QCD Approach

abstract:
  We calculate the branching ratios and CP-violating asymmetries for $B_s^0 \to
\pi^0 \eta^{(\prime)}$ decays in the perturbative QCD (pQCD) factorization
approach here. We not only calculate the usual factorizable contributions, but
also evaluate the non-factorizable and annihilation type contributions. The
pQCD predictions for the CP-averaged branching ratios are $BR(B_s^0 \to \pi^0
\eta) \approx 0.86 \times 10^{-7}$ and $BR(B_s^0 \to \pi^0 \eta') \approx 1.86
\times 10^{-7}$. The pQCD predictions for the CP-violating asymmetries are
$A_{CP}^{dir}(\pi^0 \eta)\sim -4.5 % $, $A_{CP}^{dir}(\pi^0 \eta')\sim -9.1% $,
$A_{CP}^{mix}(\pi^0 \eta)\sim -0.2%$, and $A_{CP}^{mix}(\pi^0 \eta')\sim 27.0%$
but with large errors. The above pQCD predictions can be tested in the near
future LHC-b experiments at CERN and the BTeV experiments at Fermilab.


title: Higgs instability in gapless superfluidity/superconductivity

abstract:
  In this letter we explore the Higgs instability in the gapless
superfluid/superconducting phase. This is in addition to the (chromo)magnetic
instability that is related to the fluctuations of the Nambu-Goldstone bosonic
fields. While the latter may induce a single-plane-wave LOFF state, the Higgs
instability favors spatial inhomogeneity and cannot be removed without a long
range force. In the case of the g2SC state the Higgs instability can only be
partially removed by the electric Coulomb energy. But this does not exclude the
possibility that it can be completely removed in other exotic states such as
the gCFL state.


title:
A new mechanism of neutrino mass generation in the NMSSM with broken
  lepton number

abstract:
  In the Minimal Supersymmetric Standard Model with bilinear R-parity
violation, only one neutrino eigenstate acquires a mass at tree level,
consequently experimental data on neutrinos cannot be accommodated at tree
level. We show that in the Next-to-Minimal extension, where a gauge singlet
superfield is added to primarily address the so-called $\mu$-problem, it is
possible to generate two massive neutrino states at tree level. Hence, the
global three-flavour neutrino data can be reproduced at tree level, without
appealing to loop dynamics which is vulnerable to model-dependent
uncertainties. We give analytical expressions for the neutrino mass eigenvalues
and present examples of realistic parameter choices.


title: Signals from Galactic Center and Supergravity Models

abstract:
  We analyse the effect of the compression of the dark matter due to the infall
of baryons to the galactic center on the gamma-ray flux. In addition, we also
consider the effect of non-universal supersymmetric soft terms. This analysis
shows that neutralino dark matter annihilation can give rise to signals largely
reachable by future experiments like GLAST. This is a remarkable result if we
realise that direct detection experiments will only be able to cover a small
region of the parameter space. We have also studied the recent HESS data
implying a neutralino heavier than 12 TeV. Because of such a heavy neutralino,
it is not natural to find solutions in the SUGRA framework. Nevertheless we
have carried out a quite model-independent analysis, and found the conditions
required on the particle physics side to fit the HESS data thanks to dark
matter annihilation.


title:
First Lattice QCD Study of the Sigma -> n Axial and Vector Form Factors
  with SU(3) Breaking Corrections

abstract:
  We present the first quenched lattice QCD study of the form factors relevant
for the hyperon semileptonic decay Sigma -> n l nu. The momentum dependence of
both axial and vector form factors is investigated and the values of all the
form factors at zero-momentum transfer are presented. Following the same
strategy already applied to the decay K0 -> pi- l nu, the SU(3)-breaking
corrections to the vector form factor at zero-momentum transfer, f1(0), are
determined with great statistical accuracy in the regime of the simulated quark
masses, which correspond to pion masses above ~ 0.7 GeV. Besides f1(0) also the
axial to vector ratio g1(0) / f1(0), which is relevant for the extraction of
the CKM matrix element Vus, is determined with significant accuracy. Due to the
heavy masses involved, a polynomial extrapolation, which does not include the
effects of meson loops, is performed down to the physical quark masses,
obtaining f1(0) = -0.948 +/- 0.029 and g1(0) / f1(0) = -0.287 +/- 0.052, where
the uncertainties do not include the quenching effect. Adding a recent
next-to-leading order determination of chiral loops, calculated within the
Heavy Baryon Chiral Perturbation Theory in the approximation of neglecting the
decuplet contribution, we obtain f1(0) = -0.988 +/- 0.029(lattice) +/-
0.040(HBChPT). Our findings indicate that SU(3)-breaking corrections are
moderate on both f1(0) and g1(0). They also favor the experimental scenario in
which the weak electricity form factor, g2(0), is large and positive, and
correspondingly the value of |g1(0) / f1(0)| is reduced with respect to the one
obtained with the conventional assumption g2(q**2) = 0 based on exact SU(3)
symmetry.


title: Leptogenesis from right-handed neutrino decays to right-handed leptons

abstract:
  We investigate what would be the consequences for leptogenesis of the
existence of a charged SU(2)_L singlet scalar delta^+. If such a scalar
particle exists, it allows the right-handed neutrinos to couple not only to
left-handed lepton and Higgs doublets as in ordinary leptogenesis, but also to
a right-handed charged lepton and a delta^+. This provides a new source of
leptogenesis which can be successful in a non-resonant way at scales as low as
TeV. The incorporation of this scenario in left-right symmetric and unified
models is discussed.


title: LHC and ILC probes of hidden-sector gauge bosons

abstract:
  Intersecting D-brane theories motivate the existence of exotic U(1) gauge
bosons that only interact with the Standard Model through kinetic mixing with
hypercharge. We analyze an effective field theory description of this effect
and describe the implications of these exotic gauge bosons on precision
electroweak, LHC and ILC observables.


title:
Axial masses in quasielastic neutrino scattering and single-pion
  neutrinoproduction on nucleons and nuclei

abstract:
  We analyse available experimental data on the total charged-current
neutrino-nucleon and antineutrino-nucleon cross sections for quasielastic
scattering and single-pion neutrinoproduction. Published results from the
relevant experiments at ANL, BNL, FNAL, CERN, and IHEP are included dating from
the end of sixties to the present day, covering muon neutrino and antineutrino
beams on a variety of nuclear targets, with energies from the thresholds to
about 350 GeV. The data are used to adjust the poorly known values of the axial
masses.

categories: hep-ph hep-ex nucl-ex nucl-th physics.acc-ph


title: PCAC and the Deficit of Forward Muons in pi^+ Production by Neutrinos

abstract:
  The K2K experiment, using a fine-grained detector in a neutrino beam of
energy $<E> \sim 1.3 \mathrm{GeV}$ has observed two-track events that can be
interpreted as a coherent reaction $\nu_\mu + \N \to \mu^- + \N + \pi^+
  (\N = \rm{C}^{12})$ or an incoherent process $\nu_\mu + (p,n) \to \mu^- +
\pi^+ + (p,n)$, the final nucleon being unobserved. The data show a significant
deficit of forward-going muons in the interval $Q^2 \lesssim 0.1 \rm{GeV}^2$,
where a sizeable coherent signal is expected. We attempt an explanantion of
this effect, using a PCAC formula that includes the effect of the non-vanishing
muon mass. A suppression of about 25 % is caused by a destructive interference
of the axial vector and pseudoscalar (pion-exchange) amplitudes. The incoherent
background is also reduced by 10 - 15 %. As a consequence the discrepancy
between theory and observation is significantly reduced.


title: The Elusive p-air Cross Section

abstract:
  For the $\pbar p$ and $pp$ systems, we have used all of the extensive data of
the Particle Data Group[K. Hagiwara {\em et al.} (Particle Data Group), Phys.
Rev. D 66, 010001 (2002).]. We then subject these data to a screening process,
the ``Sieve'' algorithm[M. M. Block, physics/0506010.], in order to eliminate
``outliers'' that can skew a $\chi^2$ fit. With the ``Sieve'' algorithm, a
robust fit using a Lorentzian distribution is first made to all of the data to
sieve out abnormally high $\delchi$, the individual i$^{\rm th}$ point's
contribution to the total $\chi^2$. The $\chi^2$ fits are then made to the
sieved data. We demonstrate that we cleanly discriminate between asymptotic
$\ln s$ and $\ln^2s$ behavior of total hadronic cross sections when we require
that these amplitudes {\em also} describe, on average, low energy data
dominated by resonances. We simultaneously fit real analytic amplitudes to the
``sieved'' high energy measurements of $\bar p p$ and $pp$ total cross sections
and $\rho$-values for $\sqrt s\ge 6$ GeV, while requiring that their asymptotic
fits smoothly join the the $\sigma_{\bar p p}$ and $\sigma_{pp}$ total cross
sections at $\sqrt s=$4.0 GeV--again {\em both} in magnitude and slope. Our
results strongly favor a high energy $\ln^2s$ fit, basically excluding a $\ln
s$ fit. Finally, we make a screened Glauber fit for the p-air cross section,
using as input our precisely-determined $pp$ cross sections at cosmic ray
energies.


title:
Form Factor for $B{\to}D l\tilde{\nu}$ in Light-Cone Sum Rules With
  Chiral Current Correlator

abstract:
  Within the framework of QCD light-cone sum rules (LCSR), we calculate the
form factor for $B{\to}D l\tilde{\nu}$ transitions with chiral current
correlator. The resulting form factor depends on the distribution amplitude(DA)
of the $D$-meson. We try to use three kinds of DA models of the $D$-meson. In
the velocity transfer region $1.14 < y < 1.59$, which renders the Operator
Product Expansion (OPE) near light-cone $x^2=0$ go effectively, the yielding
behavior of form factor is in agreement with that extracted from the data on $
B\to D l\tilde{\nu}$, within the error. In the larger recoil region $1.35 < y <
1.59$, the results are observed consistent with those of perturbative QCD
(pQCD). The presented calculation can play a bridge role connecting those from
the lattice QCD with the heavy quark symmetry and perturbative QCD(pQCD) to
have an all-around understanding of $B{\to}D l\tilde{\nu}$ transitions.


title: \theta_13, Rare Processes and Proton Decay in Flipped SU(5)

abstract:
  We consider an extended flipped SU(5) model, supplemented by a flavor ${\cal
U}(1)$ symmetry, which yields bi-large neutrino mixings, charged fermion mass
hierarchies and CKM mixings. The third leptonic mixing angle $\te_{13}$ turns
out to lie close to 0.07, and neutrino CP violation can be estimated from the
observed baryon asymmetry. For lepton flavor violating processes we find the
branching ratios, ${\rm BR}(\mu \to e\ga)\sim {\rm BR}(\tau \to e \ga) \sim
10^{-4}\cdot {\rm BR}(\tau \to \mu \ga) \stackrel{<}{_\sim}5\cdot 10^{-14}$.
The proton lifetime $\tau_{p\to \pi^0 e^{+}}\simeq 10^{34}-10^{36}$ yrs.


title: Mesons and tachyons with confinement and chiral restoration, and NA60

abstract:
  In this paper the spectrum of quark-antiquark systems, including light mesons
and tachyons, is studied in the true vacuum and in the chiral invariant vacuum.
The mass gap equation for the vacua and the Salpeter-RPA equation for the
mesons are solved for a simple chiral invariant and confining quark model. At
T=0 and in the true vacuum, the scalar and pseudoscalar, or the vector and
axial vector are not degenerate, and in the chiral limit, the pseudoscalar
groundstates are Goldstone bosons. At T=0 the chiral invariant vacuum is an
unstable vacuum, decaying through an infinite number of scalar and pseudoscalar
tachyons. Nevertheless the axialvector and vector remain mesons, with real
masses. To illustrate the chiral restoration, an arbitrary path between the two
vacua is also studied. Different families of light-light and heavy-light
mesons, sensitive to chiral restoration, are also studied. At higher
temperatures the potential must be suppressed, and the chiral symmetry can be
restored without tachyons, but then all mesons have small real masses.
Implications for heavy-ion collisions, in particular for the recent vector
meson spectra measured by the NA60 collaboration, are discussed.


title:
Different kind of textures of Yukawa coupling matrices in the two Higgs
  doublet model type III

abstract:
  The quark mass matrices ansatze proposed by Fritzsch, Du-Xing and
Fukuyama-Nishiura in the framework of the general two Higgs doublet model are
studied. The corresponding Yukawa matrices in the flavor basis in the different
cases considered are discussed. The corresponding Cabbibo-Kobayashi-Maskawa
matrix elements are computed in all cases and compared with their experimental
values. The complex phases of the ansatze are taken into account and the CP
violating phase $\delta$ is computed. Finally, in order to observe the
influence of the different kind of textures of Yukawa coupling matrices
considered, some phenomenology of two body decays of the top quark, the
lightest Higgs boson and the charged Higgs boson is discussed.


title:
Study on contributions of hadronic loops to decays of $J/\psi\to$ vector
  $+$ pseudoscalar mesons

abstract:
  In this work, we evaluate the contributions of the hadronic loops to the
amplitudes of $J/\psi\to PV$ where $P$ and $V$ denote light pseudoscalar and
vector mesons respectively. By fitting data of two well measured channels of
$J/\psi\to PV$, we obtain the contribution from the pure OZI process to the
amplitude which is expressed by a phenomenological quantity
$|\mathcal{G}^{PV}_{S}|$, and a parameter $\alpha$ existing in the calculations
of the contribution of hadronic loops. In terms of $\alpha$ and
$|\mathcal{G}^{PV}_{S}|$, we calculate the branching ratios of other channels
and get results which are reasonably consistent with data. Our results show
that the contributions from the hadronic loops are of the same order of
magnitude as that from the OZI processes and the interference between the two
contributions are destructive. The picture can be applied to study other
channels such as PP or VV of decays of $J/\psi$.


title: Shear viscosity and spectral function of the quark matter

abstract:
  We discuss the shear viscosity of the quark matter by using the Kubo-Mori
formula. It is found that the shear viscosity is expressed in terms of the
quark spectral function. If the spectral function is approximated by a modified
Bright-Wigner type, the viscosity decreases as the width of the spectral
function increases. We also discuss dependence of the shear viscosity on the
temperature and the density.


title:
Mini Black Holes at the LHC: Discovery Through Di-Jet Suppression,
  Mono-Jet Emission and a Supersonic Boom in the Quark-Gluon Plasma in ALICE,
  ATLAS and CMS

abstract:
  We examine experimental signatures of TeV-mass black hole formation in heavy
ion collisions at the LHC. We find that the black hole production results in a
complete disappearance of all very high $p_T$ ({$> 500$} GeV) back-to-back
correlated di-jets of total mass {$M > M_f \sim 1$}TeV. We show that the
subsequent Hawking-decay produces multiple hard mono-jets and discuss their
detection. We study the possibility of cold black hole remnant (BHR) formation
of mass $\sim M_f$ and the experimental distinguishability of scenarios with
BHRs and those with complete black hole decay. Finally we point out that a
Heckler-Kapusta-Hawking plasma may form from the emitted mono-jets. In this
context we present new simulation data of Mach shocks and of the evolution of
initial conditions until the freeze-out.


title: Properties of $B_c$ meson

abstract:
  The mass spectrum of $c \bar b$ meson is investigated with an effective
quark-antiquark potential of the form $\frac{-\alpha_c}{r}$ + $A r^{\nu}$ with
$\nu$ varying from 0.5 to 2.0. The S and P-wave masses, pseudoscalar decay
constant, weak decay partial widths in spectator model and the lifetime of
$B_c$ meson are computed. The properties calculated here are found to be in
good agreement with other theoretical and experimental values at potential
index, $\nu=1$.


title:
A study on the feasibility of a precise measurement of the
  $\tau$-dependence of the cross sections for Drell-Yan experiments at moderate
  energies

abstract:
  Recently, a reconsideration of Drell-Yan cross sections at moderate energies
and masses has suggested the possibility of relevant enhancements of the cross
sections in some kinematical regions. If confirmed, these predictions could
largely affect the planning of Drell-Yan experiments aimed at transverse spin
measurements after 2010. More in general, the problem is present of a precision
measurement of the $\tau$ dependence of Drell-Yan cross sections. Here we
discuss the feasibility of such a measurement within short time at the COMPASS
apparatus, and its relevance for the PANDA experiment.


title:
On the near-threshold enhancement in $J/\psi\to \gamma X$ with
  $X\to\omega\phi$

abstract:
  We investigate the possibility of producing the enhancement observed in
$J/\psi\to \gamma X$ with $X\to \omega\phi $ at BES by intermediate meson
rescatterings through $f_0(1710)\to PP\to \omega\phi$, $f_0(1710)\to VV\to
\omega\phi$, and $f_0(1710)\to SS\to \omega\phi$. We find that intermediate
meson rescatterings can produce some enhancement near the $\omega\phi$
threshold. Implications about the property of this enhancement are discussed.


title:
Next-to-leading order strong interaction corrections to the Delta F=2
  effective Hamiltonian in the MSSM

abstract:
  We compute the next-to-leading order strong interaction corrections to
gluino-mediated Delta F=2 box diagrams in the Minimal Supersymmetric Standard
Model. These corrections are given by two loop diagrams which we have
calculated in three different regularization schemes in the mass insertion
approximation. We obtain the next-to-leading order Wilson coefficients of the
Delta F=2 effective Hamiltonian relevant for neutral meson mixings. We find
that the matching scale uncertainty is largely reduced at the next-to-leading
order, typically from about 10-15% to few percent.


title: Neutrino physics at large colliders

abstract:
  Large colliders are not sensitive to light neutrino masses and character, but
they can produce new heavy neutrinos, allowing also for the determination of
their Dirac or Majorana nature. We review the discovery limits at the next
generation of large colliders.


title: A theory of Cosmic Rays

abstract:
  We present a theory of non-solar cosmic rays (CRs) in which the bulk of their
observed flux is due to a single type of CR source at all energies. The total
luminosity of the Galaxy, the broken power-law spectra with their observed
slopes, the position of the `knee(s)' and `ankle', and the CR composition and
its variation with energy are all predicted in terms of very simple and
completely `standard' physics. The source of CRs is extremely `economical': it
has only one parameter to be fitted to the ensemble of all of the mentioned
data. All other inputs are `priors', that is, theoretical or observational
items of information independent of the properties of the source of CRs, and
chosen to lie in their pre-established ranges. The theory is part of a `unified
view of high-energy astrophysics' --based on the `Cannonball' model of the
relativistic ejecta of accreting black holes and neutron stars. The model has
been extremely successful in predicting all the novel properties of Gamma Ray
Bursts recently observed with help of the Swift satellite. If correct, this
model is only lacking a satisfactory theoretical understanding of the `cannon'
that emits the cannonballs in catastrophic processes of accretion.


title: Quarkonia and Quark Drip Lines in Quark-Gluon Plasma

abstract:
  We extract the $Q$-$\bar Q$ potential by using the thermodynamic quantities
obtained in lattice gauge calculations. The potential is tested and found to
give dissociation temperatures that agree well with those from lattice gauge
spectral function analysis. Using such a $Q$-$\bar Q$ potential, we examine the
quarkonium states in a quark-gluon plasma and determine the `quark drip lines'
which separate the region of bound color-singlet $Q\bar Q$ states from the
unbound region. The characteristics of the quark drip lines severely limit the
region of possible bound $Q\bar Q$ states with light quarks to temperatures
close to the phase transition temperature. Bound quarkonia with light quarks
may exist very near the phase transition temperature if their effective quark
mass is of the order of 300-400 MeV and higher.


title: Weak corrections to four-parton processes

abstract:
  We report on a calculation of the `mixed' strong and (purely) weak
corrections through the order $\alpha_{\mathrm{S}}^2\alpha_{\mathrm{W}}$ to
parton-parton processes in all possible channels at hadron colliders entering
the single jet inclusive cross section. At both Tevatron and LHC, such effects
are always negligible (below permille level) in the total integrated cross
section whilst they become sizable in differential rates. Specifically, if such
corrections are defined with respect to the full leading-order result of ${\cal
O}(\alpha_{\mathrm{S}}^2
+\alpha_{\mathrm{S}}\alpha_{\mathrm{EW}}+\alpha_{\mathrm{EW}}^2)$, we find
that, at the FNAL accelerator, they can reach the -5% benchmark in the jet
transverse energy (at the kinematical limit of the machine, rendering their
detection quite difficult). At the CERN collider, in the same observable, they
exceed the -10% level already at 1 TeV and can reach -40% at 4 TeV, kinematic
regions where such corrections will be comfortably observable for standard
luminosity. In addition, such corrections are somewhat sensitive to the
factorisation/renormalisation scale choice.


title: Mirror particles and mirror matter: 50 years of speculation and search

abstract:
  This review describes the history of discovery of violation of spatial parity
P, charge conjugation parity C, combined parity CP. The hypothesis of existence
of mirror particles was called upon by its authors to restore the symmetry
between left and right. The review presents the emergence and evolution of the
concepts ``mirror particles'' and ``mirror matter''. It could serve as a
concise guide to the ``mirror-land''. An important part of the review is the
list of about 250 references with their titles.


title: Fall-apart decays of polyquark hadrons

abstract:
  We analyse fall-apart decays of poliquark (tetra, penta and molecule type)
hadrons within the constituent quark picture. For processes in which a
poliquark hadron goes to final states containing a light pseudoscalar meson the
constraints given by chiral symmetry are implemented. As an application of the
approach developed, fall-apart decays of $a(980)$ and X(3872) are studied,
assuming these mesons are poliquark hadrons. Two extreme options - confined
diquark-diquark states and molecular states - are considered. For $a^0(980)$,
the observed width can be obtained assuming that this meson is a
diquark-diquark composite with a relatively large size of around $1\div 1.5$
fm. The pure $K \bar K $ molecular-type state, however, can be excluded. For
the X(3872), a sufficiently small width can be obtained if it is a dominantly
isospin-0 diquark-diquark composite with a very large size of $\ge 2.5$ fm. The
pure molecular option appears possible if the binding energy is tiny,
$E_b\lesssim 0.2$ MeV, corresponding to a huge size.


title: Strongly Coupled Chameleon Fields: New Horizons in Scalar Field Theory

abstract:
  We show that as a result of non-linear self-interactions, scalar field
theories that couple to matter much more strongly than gravity are not only
viable but could well be detected by a number of future experiments, provided
these are properly designed to do so.


title: Analytic Study of Small Scale Structure on Cosmic Strings

abstract:
  The properties of string networks at scales well below the horizon are poorly
understood, but they enter critically into many observables. We argue that in
some regimes, stretching will be the only relevant process governing the
evolution. In this case, the string two-point function is determined up to
normalization: the fractal dimension approaches one at short distance, but the
rate of approach is characterized by an exponent that plays an essential role
in network properties. The smoothness at short distance implies, for example,
that cosmic string lensing images are little distorted. We then add in loop
production as a perturbation and find that it diverges at small scales. This
need not invalidate the stretching model, since the loop production occurs in
localized regions, but it implies a complicated fragmentation process. Our
ability to model this process is limited, but we argue that loop production
peaks a few orders of magnitude below the horizon scale, without the inclusion
of gravitational radiation. We find agreement with some features of
simulations, and interesting discrepancies that must be resolved by future
work.


title: Anomaly for Model Building

abstract:
  A simple algorithm to calculate the group theory factor entering in anomalies
at four and six dimensions for SU(N) and SO(N) groups in terms of the Casimir
invariants of their subgroups is presented. Explicit examples of some of the
lower dimensional representations of $SU(n), n \leq 5$ and SO(10) groups are
presented, which could be used for model building in four and six dimensions.


title: Energy density of the Glasma

abstract:
  The initial energy density produced in an ultrarelativistic heavy ion
collision can, in the color glass condensate framework, be factorized into a
product of the integrated gluon distributions of the nuclei. Although this
energy density is well defined without any infrared cutoff besides the
saturation scale, it is apparently logarithmically ultraviolet divergent. We
argue that this divergence is not physically meaningful and does not affect the
behavior of the system at any finite proper time.


title: Isospin symmetry breaking of K and K* mesons

abstract:
  We use the method of QCD sum rules to investigate the isospin symmetry
breaking of K and K* mesons. The electromagnetic effect, difference between up
and down current-quark masses and difference between up and down quark
condensates are important. We perform sum rule analyses of their masses and
decay constant differences, which are consistent with experimental values. Our
results yield Delta f_K = f_{K^0} - f_{K^\pm} = 1.5 MeV.


title: A Seesaw Mechanism in the Higgs Sector

abstract:
  In this letter we revisit the seesaw Higgs mechanism. We show how a seesaw
mechanism in a two Higgs doublets model can trigger the electroweak symmetry
breaking if at least one of the eigenvalues of the squared mass matrix is
negative. We then consider two special cases of interest. In the decoupling
scenario, there is only one scalar degree of freedom in the low energy regime.
In the degenerate scenario, all five degrees of freedom are in the low energy
regime and will lead to observables effects at the LHC. Furthermore, in that
scenario, it is possible to impose a discrete symmetry between the doublets
that makes the extra neutral degrees of freedom stable. These are thus viable
dark matter candidates. We find an interesting relation between the electroweak
symmetry breaking mechanism and dark matter.


title: First order radiative corrections to Bhabha scattering in $d$ dimensions

abstract:
  The luminosity measurement at the projected International Linear $e^+e^-$
Collider ILC is planned to be performed with forward Bhabha scattering with an
accuracy of the order of $10^{-4}$. A theoretical prediction of the
differential cross-section has to include one-loop weak corrections, with
leading higher order terms, and the complete two-loop QED corrections. Here, we
present the weak part and the virtual one-loop photonic corrections. For the
photonic corrections, the expansions in $\epsilon = (4-d)/2$ are derived with
inclusion of the terms of order $\epsilon$ in order to match the two-loop
accuracy. For the photonic box master integral in $d$ dimensions we compare
several different methods of evaluation.


title: Crossed Threshold Resummation

abstract:
  We show that certain general properties of threshold and joint resummations
in Drell-Yan cross sections hold as well for their crossed analogs in
semi-inclusive deep-inelastic scattering and double-inclusive leptonic
annihilation. We show that all plus-distribution corrections near threshold
show the same structure, and are determined to all logarithmic order by two
anomalous dimensions, one of which is a generalization of the D-term previously
derived in Drell-Yan. We also discuss the possibility of universality in power
corrections implied by the resummation.


title:
Addendum to "Distinguishing Spins in Decay Chains at the Large Hadron
  Collider"

abstract:
  We extend our earlier study of spin correlations in the decay chain $D\to C
q$, $C\to B l^{near}$, $B\to A l^{far}$, where $A,B,C,D$ are new particles with
known masses but undetermined spins, $l^{near}$ and $l^{far}$ are opposite-sign
same-flavour charged leptons and $A$ is invisible. Instead of looking at the
observable 2- and 3-particle invariant mass distributions separately, we
compare the full three-dimensional phase space distributions for all possible
spin assignments of the new particles, and show that this enhances their
distinguishability using a quantitative measure known as the Kullback-Leibler
distance.