title: The chiral limit of QCD and above

abstract:
  I review aspects of chiral dynamics pertinent to the structure of baryons and
few-nucleon systems, such as chiral extrapolations for the nucleon and the
delta mass, double pion photoproduction off protons, single neutral pion
electroproduction off the deuteron, pion photoproduction in the delta region,
the quark mass dependence of the nuclear forces and the possibility of an
infrared limit cycle in QCD.


title:
Mixing and decays of the antidecuplet in the context of approximate
  SU(3) symmetry

abstract:
  We consider mixing of the antidecuplet with three J^P=1/2^+ octets (the
ground-state octet, the octet containing N(1440), \Lambda(1600), \Sigma(1660)
and \Xi(1690) and the octet containing N(1710), \Lambda(1800), \Sigma(1880) and
\Xi(1950)) in the framework of approximate flavor SU(3) symmetry. We give
general expressions for the partial decay widths of all members of the
antidecuplet as functions of the two mixing angles. Identifying N_{anti-10}
with the N(1670) observed by the GRAAL experiment, we show that the considered
mixing scenario can accommodate all present experimental and phenomenological
information on the \Theta^+ and N_{anti-10} decays: \Theta^+ could be as narrow
as 1 MeV; the N_{anti-10} -> N + \eta decay is sizable, while the N_{anti-10}
->N + \pi decay is suppressed and the N_{anti-10} ->\Lambda + K decay is
possibly suppressed. Constraining the mixing angles by the N_{anti-10} decays,
we make definite predictions for the \Sigma_{anti-10} decays. We point out that
\Sigma_{anti-10} with mass near 1770 MeV could be searched for in the available
data on K_S p invariant mass spectrum, which already revealed the \Theta^+
peak. It is important to experimentally verify the decay properties of
\Sigma(1770) because its mass and J^P=1/2^+ make it an attractive candidate for
\Sigma_{anti-10}.


title: Dual string from lattice Yang-Mills theory

abstract:
  We review properties of lower-dimension vacuum defects observed in lattice
simulations of SU(2) Yang-Mills theories. One- and two-dimensional defects are
associated with ultraviolet divergent action. The action is the same divergent
as in perturbation theory but the fluctuations extend over submanifolds of the
whole 4d space. The action is self tuned to a divergent entropy and the 2d
defects can be thought of as dual strings populated with particles. The newly
emerging 3d defects are closely related to the confinement mechanism. Namely,
there is a kind of holography so that information on the confinement is encoded
in a 3d submanifold. We introduce an SU(2) invariant classification scheme
which allows for a unified description of d=1,2,3 defects. The scheme fits
known data and predicts that the 3d defects are related to chiral symmetry
breaking. Relation to stochastic vacuum model is briefly discussed as well.


title: Saturation and High Density QCD

abstract:
  Recent progress in understanding general properties of high energy scattering
near the unitarity limit, where high density gluon components of the
wavefunction are dominant, is reviewed. The similarity of the QCD problem and
that of reaction-diffusion processes in statistical physics is emphasized. The
energy dependence of the saturation momentum and the status of geometric
scaling are discussed.


title:
Measuring Active-Sterile Neutrino Oscillations with a Stopped Pion
  Neutrino Source

abstract:
  The question of the existence of light sterile neutrinos is of great interest
in many areas of particle physics, astrophysics, and cosmology. Furthermore,
should the MiniBooNE experiment at Fermilab confirm the LSND oscillation
signal, then new measurements are required to identify the mechanism
responsible for these oscillations. Possibilities include sterile neutrinos, CP
or CPT violation, variable mass neutrinos, Lorentz violation, and extra
dimensions. In this paper, we consider an experiment at a stopped pion neutrino
source to determine if active-sterile neutrino oscillations with delta-m
greater than 0.1 eV2 can account for the signal. By exploiting stopped pi+
decay to produce a monoenergetic nu_mu source, and measuring the rate of the
neutral current reaction nu_x + 12C -> nu_x +12C* as a function of distance
from the source, we show that a convincing test for active-sterile neutrino
oscillations can be performed.


title: Rare Charm Decays

abstract:
  Rare FCNC decay modes of charmed mesons are reviewed. The standard model
predictions, including both short and long distance contributions, are
summarized. Several new physics options that can give detectable signals are
described.


title:
Reanalysis the pentaquark $\Theta^+(1540)$ in the framework of QCD sum
  rules approach with direct instantons

abstract:
  In this article, we study the pentaquark state $ \Theta^+(1540)$ with a
(scalar)diquark-(pseudoscalar)diquark-antiquark type interpolating current in
the framework of the QCD sum rules approach by including the contributions from
the direct instantons. The numerical results indicate that the contributions
from the direct instantons are very small and can be safely neglected.


title:
Model-independent Constraints on the Weak Phase $\alpha$ (or $\phi_2$)
  and QCD Penguin Pollution in $B \to \pi\pi$ Decays

abstract:
  We present an {\it algebraic} isospin approach towards a more straightforward
and model-independent determination of the weak phase $\alpha$ (or $\phi_2$)
and QCD penguin pollution in $B\to \pi\pi$ decays. The world averages of
current experimental data allow us to impose some useful constraints on the
isospin parameters of $B\to \pi\pi$ transitions. We find that the magnitude of
$\alpha$ (or $\phi_2$) extracted from the indirect CP violation in $\pi^+\pi^-$
mode is in agreement with the standard-model expectation from other indirect
measurements, but its four-fold discrete ambiguity has to be resolved in the
near future.


title: Bose-Einstein correlations: a study of an invariance group

abstract:
  A group of transformations changing the phases of the single particle density
matrix, but leaving unchanged the predictions for identical particles
concerning the momentum distributions, momentum correlations etc., is
identified. Its implications for the determinations of the interaction region
from studies of Bose-Einstein correlations are discussed.


title: Cosmic rays and antishadowing

abstract:
  We note that antishadowing could help in the explanation of cosmic rays
phenomena such as knee in the energetic spectrum and existence of penetrating
and long-flying particles.


title: Universalities in hadron production and the maximum entropy principle

abstract:
  A shape of statistical momentum distribution of hadrons produced in high
energy particle collisions closely resembles one observed for a broad variety
of phenomena in nature. An attempt was made to understand a genesis of this
distribution beyond the context of each particular phenomenon.


title: Polarized Structure Functions with Neutrino Beams

abstract:
  We review the potential impact of neutrino data on the determination of the
spin structure of the nucleon. We show that a flavour decomposition of the
parton structure of the nucleon as required by present-day precision
phenomenology could only be achieved at a neutrino factory. We discuss how
neutrino scattering data would allow a full resolution of the nucleon spin
problem.


title: Baryon Resonances in the 1/N_c Expansion

abstract:
  The 1/N_c expansion of QCD provides a valuable semiquantitative tool to study
baryon scattering amplitudes and the short-lived baryon resonances embedded
within them. A generalization of methods originally applied in chiral soliton
models in the 1980's provides the key to deriving a rigorous 1/N_c expansion.
One obtains model-independent relations among amplitudes that impose mass and
width degeneracies among resonances of various quantum numbers.
Phenomenological evidence confirms that patterns of resonant decay predicted by
1/N_c agree with data. One may extend the analysis to subleading orders in
1/N_c, where again agreement with data is evident, in both meson-baryon
scattering and pion photoproduction.


title: Annihilation contribution and $B\to a_0 \pi, f_0 K$ decays

abstract:
  We analyze the decays $B^0 \to a^\pm_0 \pi^\mp$ and $B^{-,0} \to f_0 K^{-,0}$
and show that within the factorization approximation a phenomenological
consistent picture can be obtained. We show that in this approach the $O_6$
operator provides the dominant contributions to the suppressed channel $B^0 \to
a^+_0 \pi^-$. When the $a_0$ is considered a two quark state, evaluation of the
annihilation form factor using Perturbative $QCD$ implies that this
contribution is not negligible, and furthermore it can interfere constructively
or destructively with other penguin contributions. As a consequence of this
ambiguity, the positive identification of $B^0 \to \pi^+ a_0^-$ can not
distinguish between the two or four quark assignment of the $a_0$. According to
our calculation, a best candidate to distinguish the nature of $a_0$ scalar is
$Br(B^-\to \pi^0a_0^-)$ since the predictions for a four quark model is one
order of magnitude smaller than for the two quark assignment. When the scalars
are seen as two quarks states, simple theoretical assumptions based on SU(2)
isospin symmetry provide relations between different B decays involving one
scalar and one pseudoscalar meson.


title: Absolute Values of Neutrino Masses implied by the Seesaw Mechanism

abstract:
  It is found that the seesaw mechanism not only explain the smallness of
neutrino masses but also account for the large mixing angles simultaneously,
even if the unification of the neutrino Dirac mass matrix with that of up-type
quark sector is realized. We show that provided the Majorana masses have
hierarchical structure as is seen in the up-type quark sector and all mass
matrices are real, we can reduce the information about the absolute values of
neutrino masses through the data set of neutrino experiments. Especially for
$\theta_{13}=0$, we found that the neutrino masses are decided as
$m_1:m_2:m_3\approx 1:3:17$ or $1:50:250$ ($m_1\simeq m_2:m_3\approx 3:1$ or
$12:1$) in the case of normal mass spectrum (inverted mass spectrum), and the
greatest Majorana mass turns out to be $m_3^R=1\times 10^{15}$ GeV which just
corresponds to the GUT scale. Including the decoupling effects caused by three
singlet neutrinos, we also perform a renormalization group analysis to fix the
neutrino Yukawa coupling matrix at low energy.


title: Phase Structure of Nambu-Jona-Lasinio Model at Finite Isospin Density

abstract:
  In the frame of flavor SU(2) Nambu--Jona-Lasinio model with $U_A(1)$ breaking
term we found that, the structure of two chiral phase transition lines does not
exist at low isospin density in real world, and the critical isospin chemical
potential for pion superfluidity is exactly the pion mass in the vacuum.


title: On the Consistency of MSGUT Spectra

abstract:
  We show explicitly that, once convention dependent phases are properly
accounted for, the mass spectra evaluated by us in hep-ph\0204097 and
hep-ph\0405074 satisfy the Trace, SU(5) reassembly and Goldstone counting
consistency checks. Furthermore proper phase accounting shows that the
transposition symmetry called "Hermiticity" will be manifest only up to signs
arising from the product of six phase factors which must be reinserted if the
symmetry is to be verified also as regards signs. Thus the claims of
hep-ph/0405300 and hep-ph/0412348 concerning the inconsistency of our results
are completely mistaken. The Chiral multiplet spectra of the two calculations
are equivalent. However our method also gives all gauge and gauge chiral
spectra as well as a MSSM decomposition of all SO(10) MSGUT couplings, for both
tensors and spinors, which are unavailable, even in principle, using the
methods of the above papers.


title: Instantons and Structure of Pentaquark

abstract:
  We are discussing the influence of the complex structure of the QCD vacuum on
the properties of the exotic multiquark states, specially the possibility for
the existence of a deeply bound pentaquark. We show that the specific
spin-flavor properties of the instanton induced interaction between the quarks
leads to the existence of light tri- and di-quark clusters inside the
pentaquark. This strong quark correlations might be behind the anomalous
properties of the pentaquark.


title:
Tau polarization as CP diagnostic for a light Higgs boson at a photon
  collider

abstract:
  Unfortunately, we have discovered a bug in the computer program which
invalidates the numerical results of our paper. While our formulae and the
dependencies explained in the paper are correct, the numerical values of the
asymmetries presented in the paper go down by more than two orders of
magnitude. The plots and the conclusions of the paper as they stand are hence
invalid and will have to be changed. We withdraw this paper till we finish this
reformulation.


title:
Determination of the Fundamental Scale of Gravity and the Number of
  Space-time Dimensions from High Energetic Particle Interactions

abstract:
  Within the ADD-model, we elaborate an idea by Vacavant and Hinchliffe and
show quantitatively how to determine the fundamental scale of TeV-gravity and
the number of compactified extra dimensions from data at LHC. We demonstrate
that the ADD-model leads to strong correlations between the missing $E_T$ in
gravitons at different center of mass energies. This correlation puts strong
constraints on this model for extra dimensions, if probed at $\sqrt{s}=5.5$ TeV
and $\sqrt{s}=14$ TeV at LHC.


title: Importance of Threshold Corrections in Quark-Lepton Complementarity

abstract:
  The recent experimental measurements of the solar neutrino mixing angle
$\theta_{sol}$ and the Cabibbo mixing angle $\theta_C$ reveal a surprising
relation, $ \theta_{sol}+\theta_C \simeq \frac{\pi}{4}$. We note that the
lepton mixing matrix derived from quark-lepton unification can lead to a shift
of the complementarity relation at low energy. While the renormalization group
effects generally lead to additive contribution on top of the shift, in this
letter, we show that the threshold corrections which may exist in some
intermediate scale new physics such as supersymmetric standard model can
diminish it, so we can achieve the complementarity relation at a low energy.
Finally, we discuss a possibility to achieve the complementarity relation at a
high energy by taking particular form of non-symmetric form of down Yukawa
matrix.


title:
The $K^0$ condensed phase of color-flavor locked quark matter : its
  formation as a stable state reexamined

abstract:
  Taking the vector kaon-quark interaction into account, we reexamine in detail
the neutral kaon condensation in color-flavor locked quark matter. It is found
that the pairing phenomena in the quark matter are somewhat influenced by $K^0$
condensation. Different from the previous predictions, we find that the $K^0$
condensed phase might no longer be more stable than the normal phase even if
$K^0$ condensation can occur in the color-flavor locked matter.


title:
Color suppressed contributions to the decay modes B_{d,s} -> D_{s,d}
  D_{s,d}, B_{d,s} -> D_{s,d} D^*_{s,d}, and B_{d,s} -> D^*_{s,d} D^*_{s,d}

abstract:
  The amplitudes for decays of the type $B_{d,s} \to D_{s,d} D_{s,d}$, have no
factorizable contributions, while $B_{d,s} \to D_{s,d} D^*_{s,d}$, and $B_{d,s}
\to D^*_{s,d} D^*_{s,d}$ have relatively small factorizable contributions
through the annihilation mechanism. The dominant contributions to the decay
amplitudes arise from chiral loop contributions and tree level amplitudes which
can be obtained in terms of soft gluon emissions forming a gluon condensate. We
predict that the branching ratios for the processes $\bar B^0_d \to D_s^+
D_s^-$,
  $\bar B^0_d \to D_s^{+*} D_s^- $ and $\bar B^0_d \to D_s^+ D_s^{-*}$ are all
of order $(2- 3) \times 10^{-4}$, while $\bar B^0_s \to D_d^+ D_d^-$,
  $\bar B^0_s \to D_d^{+*} D_d^- $ and $\bar B^0_s \to D_d^+ D_d^{-*}$ are of
order $(4- 7) \times 10^{-3}$. We obtain branching ratios for two $D^*$'s in
the final state of order two times bigger.


title:
Twist-3 distribution amplitudes of the pion and kaon from the QCD sum
  rules

abstract:
  Twist-3 distribution amplitudes of the pion and kaon are studied in this
paper. We calculate the fist several moments for the twist-3 distribution
amplitudes (\phi_{p,\sigma}^\pi and \phi_{p,\sigma}^K) of the pion and kaon by
applying the QCD sum rules. Our results show that, (i) the first three moments
of \phi_p^K and the first two moments of \phi_p^\pi and \phi_\sigma^{\pi,K} of
the pion and kaon can be obtained with 30% uncertainty; (ii) the fourth moment
of the \phi_p^\pi and the second moment of the \phi_\sigma^K can be obtained
when the uncertainty are relaxed to 35%; (iii) the fourth moment of the
\phi_\sigma^\pi can be obtained only when the uncertainty are relaxed to 40%;
(iv) we have m_{0\pi}^p=1.10\pm 0.08 {\rm GeV} and m_{0K}^p=1.25\pm 0.15 {\rm
GeV} after including the \alpha_s-corrections to the perturbative part. These
moments will be helpful for constructing the twist-3 wave functions of the pion
and kaon.


title: Measurement of the Gluino Mass via Cascade Decays for SPS 1a

abstract:
  If R-parity conserving supersymmetry is realised with masses below the TeV
scale, sparticles will be produced and decay in cascades at the LHC. In the
case of a neutral LSP, which will not be detected, decay chains cannot be fully
reconstructed, complicating the mass determination of the new particles. In
this paper we extend the method of obtaining masses from kinematical endpoints
to include a gluino at the head of a five-sparticle decay chain. This
represents a non-trivial extension of the corresponding method for the squark
decay chain. We calculate the endpoints of the new distributions and assess
their applicability by examining the theoretical distributions for a variety of
mass scenarios. The precision with which the gluino mass can be determined by
this method is investigated for the mSUGRA point SPS 1a. Finally we estimate
the improvement obtained from adding a Linear Collider measurement of the LSP
mass.


title: Diffractive Vector Meson Production at HERA: from Soft to Hard QCD

abstract:
  Experimental results from HERA on diffractive vector meson production and
their theoretical interpretation within microscopic QCD are reviewed with an
emphasis on the BFKL color dipole and kt-factorization approaches.


title: Final State Interactions in Decays of the Exotic $\pi_{1}$ Meson

abstract:
  We analyze the role of final state interactions in decay of the lighest
exotic meson, $pi_1$ with $J^{PC}=1^{-+}. We use the relativistic
Lippmann-Schwinger equation for two coupled $\pi b_{1}$ and $\pi\rho$ channels.
The first one is the predicted dominant decay mode of the $\pi_{1}$, whereas in
the other a narrow $\pi_1(1600)$ exotic signal has been reported by the E852
collaboration. The FSI potential is constructed, based on the $\omega$ meson
exchange between the two channels. We find that this process introduces
corrections to the $\pi_{1}$ widths of the order of only a few MeV. Therefore,
we conclude that a substantial $\pi\rho$ mode cannot be generated through level
mixing.


title: The Littlest Higgs in Anti-de Sitter Space

abstract:
  We implement the SU(5)/SO(5) littlest Higgs theory in a slice of 5D Anti-de
Sitter space bounded by a UV brane and an IR brane. In this model, there is a
bulk SU(5) gauge symmetry that is broken to SO(5) on the IR brane, and the
Higgs boson is contained in the Goldstones from this breaking. All of the
interactions on the IR brane preserve the global symmetries that protect the
Higgs mass, but a radiative potential is generated through loops that stretch
to the UV brane where there are explicit SU(5) violating boundary conditions.
Like the original littlest Higgs, this model exhibits collective breaking in
that two interactions must be turned on in order to generate a Higgs potential.
In AdS space, however, collective breaking does not appear in coupling
constants directly but rather in the choice of UV brane boundary conditions. We
match this AdS construction to the known low energy structure of the littlest
Higgs and comment on some of the tensions inherent in the AdS construction. We
calculate the 5D Coleman-Weinberg effective potential for the Higgs and find
that collective breaking is manifest. In a simplified model with only the SU(2)
gauge structure and the top quark, the physical Higgs mass can be of order 200
GeV with no considerable fine tuning (25%). We sketch a more realistic model
involving the entire gauge and fermion structure that also implements T-parity,
and we comment on the tension between T-parity and flavor structure.


title:
Resolving parameter degeneracies in long-baseline experiments by
  atmospheric neutrino data

abstract:
  In this work we show that the physics reach of a long-baseline (LBL) neutrino
oscillation experiment based on a superbeam and a megaton water Cherenkov
detector can be significantly increased if the LBL data are combined with data
from atmospheric neutrinos (ATM) provided by the same detector. ATM data are
sensitive to the octant of $\theta_{23}$ and to the type of the neutrino mass
hierarchy, mainly through three-flavor effects in e-like events. This allows to
resolve the so-called $\theta_{23}$- and sign($\Delta m^2_{31}$)-parameter
degeneracies in LBL data. As a consequence it becomes possible to distinguish
the normal from the inverted neutrino mass ordering at $2\sigma$ CL from a
combined LBL+ATM analysis if $\sin^2 2\theta_{13} \gtrsim 0.02$. The potential
to identify the true values of $\sin^2 2\theta_{13}$ and the CP-phase
$\delta_{cp}$ is significantly increased through the lifting of the
degeneracies. These claims are supported by a detailed simulation of the T2K
(phase II) LBL experiment combined with a full three-flavor analysis of ATM
data in the HyperKamiokande detector.


title:
The Gluon Spin Asymmetry as a Link to Delta G and Orbital Angular
  Momentum

abstract:
  The fundamental program in high energy spin physics focuses on the spin
structure of the nucleon. The gluon and orbital angular momentum components of
the nucleon spin are virtually unknown. The J_z=1/2 sum rule involves the
integrated parton densities and can be used to extract information on the
orbital angular momentum and its evolution. To avoid any bias on a model of
Delta G, we assume that the gluon asymmetry, A=Delta G/G can be used to extract
Delta G over a reasonable kinematic region. Combining the results for Delta G
with the evolution equations, we can determine a theoretical expression for the
orbital angular momentum and its evolution.


title: See-Saw Energy Scale and the LSND Anomaly

abstract:
  The most general, renormalizable Lagrangian that includes massive neutrinos
contains ``right-handed neutrino'' Majorana masses of order M. While there are
prejudices in favor of M much larger than the weak scale, virtually nothing is
known about the magnitude of M. I argue that the LSND anomaly provides,
currently, the only experimental hint: M around 1 eV. If this is the case, the
LSND mixing angles are functions of the active neutrino masses and mixing and,
remarkably, adequate fits to all data can be naturally obtained. I also discuss
consequences of this ``eV-seesaw'' for supernova neutrino oscillations, tritium
beta-decay, neutrinoless double-beta decay, and cosmology.


title: Factorization fits to charmless strangeless B decays

abstract:
  We present fits to charmless strangeless hadronic B decay data for mean
branching ratios and CP-violating asymmetries using the QCD factorization model
of Beneke et al. Apart from one CP-violating parameter, the model gives a very
good representation of 26 measured data. We find the CKM angle alpha = (93.5
+/- 8.4 -1.3) degrees and to be quite stable to plausible "charming penguin"
corrections.


title: Charm Quark Energy Loss in QCD Matter

abstract:
  The energy loss of heavy quarks in a quark-gluon plasma of finite size is
studied within the light-cone integral approach. A simple analytical
formulation of the radiative energy loss of heavy quarks is derived. This
provides a convenient way to quantitatively estimate the quark energy loss. Our
results show that if the energy of a heavy quark is much larger than its mass,
the radiative energy loss approaches the radiative energy loss of light quarks.


title:
Heavy Quarkonium Spectrum and Production/Annihilation Rates to order
  $\beta_0^3\alpha_s^3$

abstract:
  We compute the third-order corrections to the heavy quarkonium spectrum and
production/annihilation rates due to the leading renormalization group running
of the static potential. The previously known complete ${\cal
O}(m_q\alpha_s^5)$ result for the heavy quarkonium ground state energy is
extended to the exited states. After including the ${\cal O}(\alpha_s^3)$
corrections the perturbative results are in surprisingly good agreement with
the experimental data on the masses of the excited $\Upsilon$ resonances and
the leptonic width of the $\Upsilon(1S)$ meson. The impact of the corrections
on the $\Upsilon$ sum rules and top quark-antiquark threshold production cross
section is also discussed.


title: Parity doublets in the baryon spectrum

abstract:
  Physics of the low-lying and high-lying hadrons in the light flavors sector
is reviewed. While the low-lying hadrons are strongly affected by both $U(1)_A$
and spontaneous $SU(2)_L \times SU(2)_R$ breakings, in the high-lying hadrons
these symmetries are restored. A manifestation is a persistence of the chiral
multiplet structure in both baryon and meson spectra. A fundamental origin of
this phenomenon is that effects of quantum fluctuations of both quark and gluon
fields must vanish at large $n$ or $J$ and a semiclassical description becomes
adequate. A relation between the chiral symmetry restoration and the string
picture of excited hadrons is discussed.


title: Structure of Lambda(1405) and chiral dynamics

abstract:
  We report on a recent theoretical work on the structure of the Lambda(1405)
resonance within a chiral unitary approach, in which the resonance is
dynamically generated in meson-baryon scattering. Studying the analytic
structure of the scattering amplitude, we have found that there are two poles
lying around energies of Lambda(1405) with different widths and couplings to
the meson-baryon states. We discuss reactions to conform the double pole
structure in experiment and elastic K^- p scattering at low energies.


title: Front-end electronics for ALICE dimuon trigger RPCs

abstract:
  A dedicated front-end electronics has been developed for the trigger chambers
of the ALICE muon spectrometer which will work at the future LHC at CERN. These
trigger chambers are based on RPCs (Resistive Plate Chambers) working in
streamer mode. The number of electronics channels (about 21000) and the fact
that RPC pulsed signals have specific characteristics have led to design a 8
channels front-end ASIC using a new discrimination technique. The principle of
the ASIC is described and the radiation hardness is discussed. Special emphasis
is put on production characteristics of about 4000 chips.


title: About helicity conservation in gauge boson scattering at high energy

abstract:
  We remark that the high energy gauge boson scattering processes involving
two-body initial and final states, satisfy certain selection rules described as
helicity conservation of the \underline{gauge boson} amplitudes (GBHC). These
rules are valid at Born level, as well as at the level of the leading and
sub-leading 1-loop logarithmic corrections, in both the Standard Model (SM) and
the Minimal Supersymmetric Standard Model (MSSM). A "fermionic equivalence"
theorem is also proved, which suggests that GBHC is valid at all orders in MSSM
at sufficiently high energies, where the mass suppressed contributions are
neglected.


title: Tripletless unification in the conformal window

abstract:
  A product SU(5)xSp(4) grand unified model is proposed with no fundamental
Higgs fields transforming under SU(5). Higgs doublets are instead embedded into
a four dimensional representation of the Sp(4) gauge group, and hence there is
no doublet-triplet splitting problem because there are no triplets. The Sp(4)
group contains enough matter to lie in the conformal window, causing its gauge
coupling to flow to a strongly-coupled infrared fixed-point at low energy,
naturally preserving gauge coupling unification to percent level accuracy.
Yukawa couplings, including the top, arise through dimension five operators
that are enhanced by the large anomalous dimension of the Higgs fields. Proton
decay mediated by dimension five operators is absent at the perturbative level.
It reappears, however, non-perturbatively due to Sp(4) instantons but the rate
is suppressed by a high power of the ratio of the dynamical scale to the
unification scale. With gravity- or gaugino-mediated supersymmetry breaking,
non-universal gaugino masses are predicted, satisfying specific one-loop
renormalization group invariant relations. These predictions should be easily
testable with the LHC and a linear collider.


title:
Effects of R-parity violation in unpolarized top quark decay into
  polarized W-boson

abstract:
  We calculate one-loop R-parity violating corrections to the top quark decay
into a bottom quark and a polarized W-gauge boson. The corrections are
presented according to the total corrections, the longitudinal corrections and
the transverse corrections, respectively. We compared our results with the
${\cal O}(\alpha_s)$ QCD corrections, the ${\cal O}(\alpha)$ electroweak (EW)
and finite width corrections, and also the supersymmetric (SUSY) corrections
with R-parity conservation, respectively.


title: Supernova Neutrino Oscillations

abstract:
  Observing a high-statistics neutrino signal from a galactic supernova (SN)
would allow one to test the standard delayed explosion scenario and may allow
one to distinguish between the normal and inverted neutrino mass ordering due
to the effects of flavor oscillations in the SN envelope. One may even observe
a signature of SN shock-wave propagation in the detailed time-evolution of the
neutrino spectra. A clear identification of flavor oscillation effects in a
water Cherenkov detector probably requires a megatonne-class experiment.


title: Gluon production and diffraction in the dipole picture

abstract:
  Using the eikonal approximation, we show that inclusive gluon production is
related to the scattering of a gluon-gluon dipole while diffractive gluon
production in DIS is related to a two-$q\bar q$ dipole scattering amplitude.
Hence diffractive photon dissociation cross-sections are observables that
provide potential information on dipole correlations, which represent an open
issue in high-energy QCD.


title:
Semileptonic decays of Bc mesons into charmonium states in a
  relativistic quark model

abstract:
  We use the framework of a relativistic constituent quark model to study the
semileptonic transitions of the Bc meson into CCbar charmonium states where
CCbar = etaC (1S0), J/psi (3S1), chiC0 (3P0), chiC1 (3P1), hc (1P1), chiC2
(3P2), psi (3D2). We compute the q^2-dependence of all relevant form factors
and give predictions for their semileptonic Bc decay modes including also their
tau-modes. We derive a formula for the polar angle distribution of the charged
lepton in the (l nu) c.m. frame and compute the partial helicity rates that
multiply the angular factors in the decay distribution. For the discovery
channel [B_c => J/psi (=> mu+ mu-) l nu] we compute the transverse/longitudinal
composition of the J/psi which can be determined by an angular analysis of the
decay J/psi => mu+ mu-. We compare our results with the results of other
calculations.


title: Phase Transitions in the NMSSM

abstract:
  We study phase transitions in the Next-to-Minimal Supersymmetric Standard
Model (NMSSM) with the weak scale vacuum expectation values of the singlet
scalar, constrained by Higgs spectrum and vacuum stability. We find four
different types of phase transitions, three of which have two-stage nature. In
particular, one of the two-stage transitions admits strongly first order
electroweak phase transition, even with heavy squarks. We introduce a
tree-level explicit CP violation in the Higgs sector, which does not affect the
neutron electric dipole moment. In contrast to the MSSM with the CP violation
in the squark sector, a strongly first order phase transition is not so
weakened by this CP violation.


title: Groebner Bases in Perturbative Calculations

abstract:
  In this paper we outline the most general and universal algorithmic approach
to reduction of loop integrals to basic integrals. The approach is based on
computation of Groebner bases for recurrence relations derived from the
integration by parts method. In doing so we consider generic recurrence
relations when propagators have arbitrary integer powers treated as symbolic
variables (indices) for the relations.


title: Can mass-less QCD dynamically generate heavy quarks?

abstract:
  As it was suggested by previous works on a modified perturbation expansion
for QCD, the possibility for the generation of large quark condensates in the
mass-less version of the theory is explored. For this purpose, it is firstly
presented a way of well define the Feynman diagrams at any number of loops by
just employing dimensional regularization. After that, the calculated zero and
one loop corrections to the effective potential indicate a strong instability
of the system under the generation of quark condensates. The also evaluated
quark condensate dependence of particular two loop terms does not modify the
instability picture arising at one loop. The results suggest a possible
mechanism for a sort of Top Condensate Model to be a dynamically fixed
effective action for mass-less QCD. The inability of lattice calculations in
detecting this possibility could be related with the limitations in treating
the fermion determinants.


title: Azimuthal asymmetries in unpolarized Drell-Yan events on nuclear targets

abstract:
  We show that for Drell-Yan events by unpolarized hadronic projectiles and
nuclear targets, azimuthal asymmetries can arise from the nuclear distortion of
the hadronic projectile wave function, typically a spin-orbit effect occurring
on the nuclear surface. The asymmetry depends on quantities that enter also the
spin asymmetry in the corresponding Drell-Yan event on polarized free nucleonic
targets. Hence, this study can be of help in exploring the spin structure of
the nucleon, in particular the transverse spin distribution of partons inside
the proton. All arguments can be extended also to antinucleon projectiles and,
consequently, apply to possible future measurements involving nuclear targets
at the foreseen HESR ring at GSI.


title:
Connection Between the Neutrino Seesaw Mechanism and Properties of the
  Majorana Neutrino Mass Matrix

abstract:
  If it can be ascertained experimentally that the 3X3 Majorana neutrino mass
matrix M_nu has vanishing determinants for one or more of its 2X2 submatrices,
it may be interpreted as supporting evidence for the theoretically well-known
canonical seesaw mechanism. I show how these two things are connected and offer
a realistic M_nu with two zero subdeterminants as an example.


title: Dynamical gluon mass and $pp$ elastic scattering

abstract:
  The application of a modified gluon propagator and an infrared frozen running
co upling constant in the description of the proton-proton elastic scattering
is in vestigated. The model based on the exchange of the Pomeron as a pair of
non-pert urbative gluons is modified to include the frozen coupling constant in
the infra red kinematic region. A good fit to the data of the differential
cross section f or different center of mass energies (53 GeV and 1.8 TeV) is
obtained.


title:
Diquarks and the Semi-Leptonic Decay of $\Lambda_{b}$ in the Hybrid
  Scheme

abstract:
  In this work we use the heavy-quark-light-diquark picture to study the
semileptonic decay $\Lambda_b \to \Lambda_c+l+\bar{\nu}_l$ in the so-called
hybrid scheme. Namely, we apply the heavy quark effective theory (HQET) for
larger $q^2$ (corresponding to small recoil), which is the invariant mass
square of $l+\bar\nu$, whereas the perturbative QCD approach for smaller $q^2$
to calculate the form factors. The turning point where we require the form
factors derived in the two approaches to be connected, is chosen near
$\rho_{cut}=1.1$. It is noted that the kinematic parameter $\rho$ which is
usually adopted in the perturbative QCD approach, is in fact exactly the same
as the recoil factor $\omega=v\cdot v'$ used in HQET where $v$, $v'$ are the
four velocities of $\Lambda_b$ and $\Lambda_c$ respectively. We find that the
final result is not much sensitive to the choice, so that it is relatively
reliable. Moreover, we apply a proper numerical program within a small range
around $\rho_{cut}$ to make the connection sufficiently smooth and we
parameterize the form factor by fitting the curve gained in the hybrid scheme.
The expression and involved parameters can be compared with the ones gained by
fitting the experimental data. In this scheme the end-point singularities do
not appear at all. The calculated value is satisfactorily consistent with the
data which is recently measured by the DELPHI collaboration within two standard
deviations.


title:
Electroweak Symmetry Breaking from SUSY Breaking with Bosonic See-Saw
  Mechanism

abstract:
  We introduce the idea of bosonic see-saw mechanism in analogy with the
see-saw mechanism. Bosonic see-saw is a new symmetry breaking mechanism and we
apply it to explain electroweak symmetry breaking as an inevitable consequence
of supersymmetry breaking. The breaking of electroweak symmetry occurs at tree
level once supersymmetry is broken. Absence of color/charge breaking in this
model is related to doublet-triplet splitting in grand unified theory. An
extension of MSSM with a weak triplet shows very interesting results especially
when mu =0. It provides the most natural understanding of why we have only
electroweak symmetry breaking rather than having color/charge breaking. In the
limit mu=0, the model predicts very light chargino mass, 104 GeV while Higgs is
heavy, 130 GeV.


title:
Rare three-body decay t -> c h gamma in the standard model and the
  two-Higgs doublet model

abstract:
  A complete calculation of the rare three-body decay t --> c h gamma is
presented in the framework of the standard model. In the unitary gauge, such a
calculation involves about 20 Feynman diagrams. We also calculate this decay in
the general two-Higgs doublet model (model III), in which it arises at the
tree-level. While in the standard model the decay t --> c h gamma is extremely
suppressed, with a branching fraction of the order of $10^{-15}$ for a Higgs
boson mass of the order of 115 GeV, in the model III it may have a branching
ratio up to $10^{-5}$. We also discuss the crossed decay h --> b \bar{s} gamma.


title: Regge and factorized GPD models in $\rho^0$ elastic electroproduction

abstract:
  A possibility to study Regge and factorized parameterizations of generalized
parton distributions in hard electroproduction of $\rho^0$ on the proton is
considered. For that the dependences of the differential cross sections on the
transferred momentum for these parameterizations are compared.


title:
Nonlinear dynamics of soft boson collective excitations in hot QCD
  plasma III: bremsstrahlung and energy losses

abstract:
  Within of the framework of semiclassical approximation a general formalism
for deriving an effective current generating bremsstrahlung of arbitrary number
of soft gluons (longitudinal or transverse ones) in scattering of higher-energy
parton off thermal parton in hot quark-gluon plasma with subsequent extension
to two and more scatterers, is obtained. For the case of static color centers
an expression for energy loss induced by usual bremsstrahlung of lowest-order
with allowance for an effective temperature-induced gluon mass and finite mass
of the projectile (heavy quark), is derived. The detailed analysis of
contribution to radiation energy loss associated with existence of effective
three-gluon vertex induced by hot QCD medium, is performed. It is shown that in
general, the bremsstrahlung associated with this vertex have no sharp direction
(as in the case of usual bremsstrahlung) and therefore here, we can expect an
absence of suppression effect due to multiple scattering. For the case of two
color static scattering centers it was shown that the problem of calculation of
bremsstrahlung induced by four-gluon hard thermal loop (HTL) vertex correction
can be reduced to the problem of the calculation of bremsstrahlung induced by
three-gluon HTL correction. It was shown that for limiting value of soft gluon
occupation number $N_{\bf k}\sim 1/\alpha_s$ all higher processes of
bremsstrahlung of arbitrary number of soft gluons become of the same order in
coupling, and the problem of resummation of all relevant contributions to
radiation energy loss of fast parton, arises. An explicit expression for matrix
element of two soft gluon bremsstrahlung in small angles approximation is
obtained.


title: Neutrino spin relaxation in medium with stochastic characteristics

abstract:
  The helicity evolution of a neutrino interacting with randomly moving and
polarized matter is studied. We derive the equation for the averaged neutrino
helicity. The type of the neutrino interaction with background fermions is not
fixed. In the particular case of a tau-neutrino interacting with
ultrarelativistic electron-positron plasma we obtain the expression for the
neutrino helicity relaxation rate in the explicit form. We study the neutrino
spin relaxation in the relativistic primordial plasma. Supposing that the
conversion of left-handed neutrinos into right-handed ones is suppressed at the
early stages of the Universe evolution we get the upper limit on the
tau-neutrino mass.


title: Double proton tagging at the LHC as a means to discover new physics

abstract:
  We review the theoretical and experimental motivations behind recent
proposals to add forward proton tagging detectors to the LHC experiments as a
means to search for new physics.


title: QCD Analysis of Dijet Production at Low {\boldmath $Q^2$} at HERA

abstract:
  Recent H1 data on triple differential dijet cross sections in $e^\pm p$
interactions in the region of low photon virtualities are shown to be in
reasonable agreement with the predictions of the NLO QCD calculations obtained
using the program NLOJET++. The implications of this observation for the
phenomenological relevance of the concept of resolved virtual photon are
discussed.


title:
Possible violation of the spin-statistics relation for neutrinos:
  cosmological and astrophysical consequences

abstract:
  We assume that the Pauli exclusion principle is violated for neutrinos, and
consequently, neutrinos obey the Bose-Einstein statistics. Cosmological and
astrophysical consequences of this assumption are considered. Neutrinos may
form cosmological Bose condensate which accounts for all (or a part of) the
dark matter in the universe. ``Wrong'' statistics of neutrinos could modify big
bang nucleosynthesis, leading to the effective number of neutrino species
smaller than three. Dynamics of the supernova collapse would be influenced and
spectra of the supernova neutrinos may change. The presence of neutrino
condensate would enhance contributions of the Z-bursts to the flux of the UHE
cosmic rays and lead to substantial refraction effects for neutrinos from
remote sources. The Pauli principle violation for neutrinos can be tested in
the two-neutrino double beta decay.


title:
Unbiased determination of the proton structure function F_2^p with
  faithful uncertainty estimation

abstract:
  We construct a parametrization of the deep-inelastic structure function of
the proton F_2 based on all available experimental information from charged
lepton deep-inelastic scattering experiments. The parametrization effectively
provides a bias-free determination of the probability measure in the space of
structure functions, which retains information on experimental errors and
correlations. The result is obtained in the form of a Monte Carlo sample of
neural networks trained on an ensemble of replicas of the experimental data. We
discuss in detail the techniques required for the construction of bias-free
parameterizations of large amounts of structure function data, in view of
future applications to the determination of parton distributions based on the
same method.


title: Fermion field renormalization prescriptions

abstract:
  We discuss all possible fermion field renormalization prescriptions in
conventional field renormalization meaning and mainly pay attention to the
imaginary part of unstable fermion Field Renormalization Constants (FRC). We
find that introducing the off-diagonal fermion FRC leads to the decay widths of
physical processes $t\to c Z$ and $b\to s \gamma$ gauge-parameter dependent. We
also discuss the necessity of renormalizing the bare fields in conventional
quantum field theory.


title:
Heavy neutrino mass hierarchy from leptogenesis in left-right symmetric
  models with spontaneous CP-violation

abstract:
  We consider left-right symmetric model with spontaneous CP-violation. The
Lagrangian of this model is CP invariant and the Yukawa couplings are real. Due
to spontaneous breaking of the gauge symmetry, some of the neutral Higgses
acquire complex vacuum expectation values, which lead to CP-violation. In the
model considered here, we identify the neutrino Dirac mass matrix with that of
Fritzsch type charged lepton mass matrix. We assume a hierarchical spectrum of
the right handed neutrino masses and derive a bound on this hierarchy by
assuming that the decay of the lightest right handed neutrino produces the
baryon asymmetry via the leptogenesis route. It is shown that the mass
hierarchy we obtain is compatible with the current neutrino oscillation data.


title:
Next-to-leading order QCD predictions for $A^0Z^0$ associated production
  at the CERN Large Hadron Collider

abstract:
  We present the calculations of the complete next-to-leading order (NLO) QCD
corrections (including supersymmetric QCD) to the inclusive total cross
sections of the associated production processes $pp\to A^0Z^0+X$ in the Minimal
Supersymmetric Standard Model at the CERN Large Hadron Collider. Both the
dimensional regularization scheme and the dimensional reduction scheme are used
to organize the calculations which yield the same NLO rates. The NLO correction
can either enhance or reduce the total cross sections, but it generally
efficiently reduces the dependence of the total cross sections on the
renormalization/factorization scale. We also examine the uncertainty of the
total cross sections due to the parton distribution function uncertainties.


title: Update on Fermion Mass Models with an Anomalous Horizontal U(1) Symmetry

abstract:
  We reconsider models of fermion masses and mixings based on a gauge anomalous
horizontal U(1) symmetry. In the simplest model with a single flavon field and
horizontal charges of the same sign for all Standard Model fields, only very
few charge assignements are allowed when all experimental data, including
neutrino oscillation data, is taken into account. We show that a precise
description of the observed fermion masses and mixing angles can easily be
obtained by generating sets of the order one parameters left unconstrained by
the U(1) symmetry. The corresponding Yukawa matrices show several interesting
features which may be important for flavour changing neutral currents and CP
violation effects in supersymmetric models.


title: Study of the eta-eta' system in the two mixing angle scheme

abstract:
  An analysis of various decay processes is performed using the two mixing
angle description of the $\eta$-$\eta^\prime$ system, incorporating the link to
the gluonic sector through anomalies. The agreement is excellent. For
comparison with previous works, our results are expressed both in the
``octet-singlet'' and in the ``quark-flavour'' basis. It turns out that at the
present experimental accuracy, the two angles are significantly different in
the former, but not in the latter basis. The implications of our analysis for
the Large $N_c$ $\chi$PT predictions are also discussed.


title:
Radiative Decays Involving $f_0(980)$ and $a_0(980)$ and Mixing Between
  Low and High Mass Scalar Mesons

abstract:
  We analyze the experimental data for $\phi\to f_0(980)\gamma$, $\phi\to
a_0(980)\gamma$, $f_0(980)\to\gamma\gamma$ and $a_0(980)\to\gamma\gamma$ decay
widths in a framework where $f_0(980)$ and $a_0(980)$ are assumed to be mainly
$qq\bar{q}\bar{q}$ low mass scalar mesons and mixed with $q\bar{q}$ high mass
scalar mesons. Applied the vector meson dominance model (VDM), these decays
amplitudes are expressed by coupling parameters $B$ describing the S
($qq\bar{q}\bar{q}$ scalar meson)-V(vector meson)- V(vector meson) coupling and
$B'$ describing the S' ($q\bar{q}$ scalar meson)-V-V coupling. Adopting the
magnitudes for $B$ and $B'$ as $2.8{GeV^{-1}}$ and $12{GeV^{-1}}$,
respectively, the mixing angle between $a_0(980)$ and $a_0(1450)$ as 9 degrees,
and the mixing parameter $\lambda_{01}$ causing the mixing between I=0
$qq\bar{q}\bar{q}$ state and $q\bar{q}$ state as $0.24{GeV}^2$, we can
interpret these experimental data, consistently.


title: Exclusive production of pentaquarks in the scaling regime

abstract:
  We investigate two exclusive reactions with a Theta+ pentaquark in the final
state: electroproduction of a K meson on the nucleon, and K+ scattering on a
neutron target producing a lepton pair. These reactions offer unique
opportunities to investigate the structure of pentaquark baryons at parton
level. We discuss the generalized parton distributions for the N --> Theta+
transition and give the leading order amplitude for these processes in the
Bjorken regime.


title: A Susy Phase Transition as Central Engine

abstract:
  For several decades the energy source powering supernovae and gamma ray
bursts has been a troubling mystery. Many articles on these phenomena have been
content to model the consequences of an unknown "central engine" depositing a
large amount of energy in a small region. In the case of supernovae this is
somewhat unsettling since the type 1a supernovae are assumed to be
"standardizable candles" from which important information concerning the dark
energy can be derived. It should be expected that a more detailed understanding
of supernovae dynamics could lead to a reduction of the errors in this
relationship. Similarly, the current state of the standard model theory of
gamma ray bursts, which in some cases have been associated with supernovae, has
conceptual gaps not only in the central engine but also in the mechanism for
jet collimation and the lack of baryon loading. We discuss here the
Supersymmetric (susy) phase transition model for the central engine.


title: Non-Gaussianity from Instant and Tachyonic Preheating

abstract:
  We study non-Gaussianity in two distinct models of preheating: instant and
tachyonic. In instant preheating non-Gaussianity is sourced by the local terms
generated through the coupled perturbations of the two scalar fields. We find
that the non-Gaussianity parameter is given by $f_{NL}^{\phi}\sim 2g < O(1)$,
where $g$ is a coupling constant, so that instant preheating is unlikely to be
constrained by WMAP or Planck. In the case of tachyonic preheating
non-Gaussianity arises solely from the instability of the tachyon matter and is
found to be large. We find that for single field inflation the present WMAP
data implies a bound $V_{0}^{1/4}/M_{P}\leq 10^{-4}$ on the scale of tachyonic
instability. We argue that the tachyonic preheating limits are useful also for
string-motivated inflationary models.


title: Four-Quark Mesons

abstract:
  The features of a model interpreting the light scalar mesons as
diquark-antidiquark bound states and the consequences of its natural extension
to include heavy quarks are briefly reviewed.


title: Photons in gapless color-flavor-locked quark matter

abstract:
  We calculate the Debye and Meissner masses of a gauge boson in a material
consisting of two species of massless fermions that form a condensate of Cooper
pairs. We perform the calculation as a function of temperature, for the cases
of neutral Cooper pairs and charged Cooper pairs, and for a range of parameters
including gapped quaisparticles, and ungapped quasiparticles with both
quadratic and linear dispersion relations at low energy.
  Our results are relevant to the behavior of photons and gluons in the gapless
color-flavor-locked phase of quark matter. We find that the photon's Meissner
mass vanishes, and the Debye mass shows a non-monotonic temperature dependence,
and at temperatures of order the pairing gap it drops to a minimum value of
order sqrt(alpha) times the quark chemical potential. We confirm previous
claims that at zero temperature an imaginary Meissner mass can arise from a
charged gapless condensate, and we find that at finite temperature this can
also occur for a gapped condensate.


title: Split Supersymmetry from Anomalous U(1)

abstract:
  We present a scenario wherein the anomalous U(1) D-term of string origin
triggers supersymmetry breaking and generates naturally a Split Supersymmetry
spectrum. When the gaugino and the Higgsino masses (which are of the same order
of magnitude) are set at the TeV scale, we find the scalar masses to be in the
range (10^6 - 10^8) GeV. The U(1) D-term provides a small expansion parameter
which we use to explain the mass and mixing hierarchies of quarks and leptons.
Explicit models utilizing exact results of N = 1 suersymmetric gauge theories
consistent with anomaly constraints, fermion mass hierarchy, and supersymmetry
breaking are presented.


title: Gravity and strings

abstract:
  This is a broad-brush review of how string theory addresses several important
questions of gravitational physics. The problem of non-renormalizability is
first reviewed, followed by introduction of string theory as an
ultraviolet-finite theory of gravity. String theory's successes also include
predicting both gauge theory and fermions. The difficulty of extra dimensions
becomes a possible virtue, when one notes that these lead to mechanisms to
explain fermion generations, as well as a means to break the large gauge
symmetries of string theory. Finally, a long standing problem of string theory,
that of fixing the size and shape of the extra dimensions, has recently been
addressed and may shed light on the origin of the cosmological constant, the
ultimate fate of our universe, as well as the question of why gravity_is_ so
weak.


title: Flavor Physics in Kaon Decays

abstract:
  In this talk I review some topics related to flavor physics in kaon decays
with emphasis on the roles which kaon decays can play in the determinations of
hadronic matrix elements, the CKM parameters and new physics beyond the
Standard Model.


title: Prediction of $B_c\to D\pi$ in the pQCD approach

abstract:
  We investigate the branching ratios and direct CP asymmetries of $B_c^+\to
D^0\pi^+$ and $B_c^+\to D^+\pi^0$ decays in the PQCD approach. All the diagrams
with emission topology or annihilation topology are calculated strictly. A
branching ratio of $10^{-6}$ and $10^{-7}$ for $B_c^+\to D^0\pi^+$ and
$B_c^+\to D^+\pi^0$ decay is predicted, respectively. Because of the different
weak phase and strong phase from penguin operator and two kinds of tree
operator contributions, we predict a possible large direct CP violation:
$A^{\rm dir}_{cp} (B_c^\pm \to D^0 \pi^\pm)\approx -50%$ and $A^{\rm dir}_{cp}
(B_c^\pm \to D^\pm \pi^0)\approx 25%$ when $\gamma=55^\circ$, which can be
tested in the coming LHC.


title:
Production of the h_c and h_b and Implications for Quarkonium
  Spectroscopy

abstract:
  The recent observation of the h_c is an important test of QCD calculations
and provides constraints on models of quarkonium spectroscopy. In this
contribution I discuss some of these implications and describe methods to
search for the h_c and h_b via radiative transitions and other means.


title: The Unreasonable Success of CKM Theory

abstract:
  CKM theory has scored novel successes recently, namely vindication of weak
universality and its first decisive test in CP studies. While this does not
weaken the case for New Physics, one cannot count on the latter to induce large
discrepancies in future studies. To establish smallish deviations one needs
precise predictions; those in turn require accurate CKM parameters. I list
strategies for extracting $V(cb)$, $V(ub)$ and $V(td)$. After short comments on
New Physics in semileptonic B decays and on $\Delta \Gamma (B_s)$ I review the
CP phenomenology in B decays and stress that a comprehensive program of
studying flavour dynamics has to form an essential complement of our next
adventure, uncovering the physics behind the electroweak phase transition.


title: A Heavy Quark Symmetry Approach to Baryons

abstract:
  We evaluate different properties of baryons with a heavy c or b quark.
  The use of Heavy Quark Symmetry (HQS) provides with an important
simplification of the non relativistic three body problem which can be solved
by means of a simple variational approach. This scheme is able to reproduce
previous results obtained with more involved Faddeev calculations. The
resulting wave functions are parametrized in a simple manner, and can be used
to calculate further observables.


title: Proton Lifetime from SU(5) Unification in Extra Dimensions

abstract:
  We provide detailed estimates of the proton lifetime in the context of simple
supersymmetric SU(5) grand unified models with an extra compact spatial
dimension, described by the orbifold S/(Z_2 x Z_2') and by a large
compactification scale Mc. We focus on a class of models where the grand
unified symmetry is broken by the compactification mechanism and where baryon
violation proceeds mainly through gauge vector boson exchange so that the
proton lifetime scales as the fourth power of Mc. We carefully compute Mc from
a next-to-leading analysis of gauge coupling unification and we find that Mc
can only be predicted up to an overall factor one hundred. The simplest model,
where the dominant decay mode is (pi^0 e+) and has no flavour suppression, is
strongly constrained by existing data, but not totally ruled out. We also
analyze models where some of the matter fields are localized in the extra space
and proton decay is flavour suppressed. In models associated to anarchy in the
neutrino sector the preferred decay channel is (K+ {\bar \nu}) and the lifetime
can be within the reach of the next generation of experiments.


title: Evolution at small x_bj: The Color Glass Condensate

abstract:
  When probed at very high energies or small Bjorken x_bj, QCD degrees of
freedom manifest themselves as a medium of dense gluon matter called the Color
Glass Condensate. Its key property is the presence of a density induced
correlation length or inverse saturation scale R_s=1/Q_s. Energy dependence of
observables in this regime is calculable through evolution equations, the
JIMWLK equations, and characterized by scaling behavior in terms of Q_s. These
evolution equations share strong parallels with specific counterparts in jet
physics. Experimental relevance ranges from lepton proton and lepton nucleus
collisions to heavy ion collisions and cross correlates physics at virtually
all modern collider experiments.


title: Extension of the JIMWLK Equation in the Low Gluon Density Region

abstract:
  It has recently been realized that the Balitsky-JIMWLK equations have serious
shortcomings as equations to be used in small-x evolution near the unitarity
limit. A recent generalization of the Balitsky equations has been given which
corrects these shortcomings. In this paper we present an equivalent discussion,
but in terms of the JIMWLK equation where we show that a new (fourth order
functional derivative) term should be included. We also present a stochastic
version of the new equation which, however, has some unusual mathematical
aspects which are not as yet well understood.


title:
Fermionic dispersion relations in ultradegenerate relativistic plasmas
  beyond leading logarithmic order

abstract:
  We determine the dispersion relations of fermionic quasiparticles in
ultradegenerate plasmas by a complete evaluation of the on-shell
hard-dense-loop-resummed one-loop fermion self energy for momenta of the order
of the Fermi momentum and above. In the case of zero temperature, we calculate
the nonanalytic terms in the vicinity of the Fermi surface beyond the known
logarithmic approximation, which turn out to involve fractional higher powers
in the energy variable. For nonzero temperature (but much smaller than the
chemical potential), we obtain the analogous expansion in closed form, which is
then analytic but involves polylogarithms. These expansions are compared with a
full numerical evaluation of the resulting group velocities and damping
coefficients.


title: Excited Baryons in Large $N_c$ QCD

abstract:
  This talk reviews recent developments in the use of large $N_c$ QCD in the
description of baryonic resonances. The emphasis is on the model-independent
nature of the approach. Key issues discussed include the spin-flavor symmetry
which emerges at large $N_c$ and the direct use of scattering observables. The
connection to quark model approaches is stressed.


title:
Options for Orbifold-GUT Model Building from Five-Dimensional
  Supergravity

abstract:
  This is the first paper of a series that will examine the options for
embedding supersymmetric orbifold-GUTs into five-dimensional N=2
Yang-Mills-Einstein supergravity theories (YMESGTs). In particular, we focus on
the allowed couplings of charged hypermultiplets in the lowest dimensional reps
of the gauge groups SU(5), SO(10) and E(6). Our results are within the
classification of homogeneous quaternionic scalar manifolds. In the minimal
coupling of a generation of bulk matter hypermultiplets, supergravity requires
the field content of an SO(10) scenario. In the minimal coupling of $n$ bulk
generations of matter and higgs hypermultiplets, supergravity requires the
field content of an E(6) scenario.
  We also discuss the coupling of tensors and non-compact gaugings in 5D
YMESGTs, which can serve as alternative ways to obtain four-dimensional Higgs
sectors. Charged tensor couplings seem to be difficult to work with
phenomenologically since a U(1) gauge factor is always required when they are
present, and it is not clear if tensors can be put in unified multiplets with
other fields, if this is desired. This seems to imply that tensor coulpings in
GUT scenarios may be better suited in higher dimensional settings. The
non-compact gaugings discussed here are simple, and offer a novel unification
scenario in which the supergravity and vector multiplets are connected by gauge
transformations.
  The main points are summarized in tables and the conclusion. Although the
discussion is in the spirit of a "bottom-up" approach, M-theory is taken as a
motivating background.


title: Magnetic moments of exotic pentaquark baryons

abstract:
  In this talk, we present our recent investigation on the magnetic moments of
the exotic pentaquark states, based on the chiral quark-soliton model, all
relevant intrinsic parameters being fixed by using empirical data.


title: Non-Linear Effects in High Energy Hadronic Interactions

abstract:
  The influence of non-linear interaction effects on the characteristics of
hadronic collisions and on the development of extensive air showers (EAS) is
investigated. Hadronic interactions are treated phenomenologically in the
framework of Gribov's Reggeon approach with non-linear corrections being
described by enhanced (Pomeron-Pomeron interaction) diagrams. A re-summation
algorithm for higher order enhanced graphs is proposed. The approach is applied
to develop a new hadronic interaction model QGSJET-II, treating non-linear
effects explicitely in individual hadronic and nuclear collisions. The model is
applied to EAS modelization and the obtained results are compared to the
original QGSJET predictions. Possible consequences for EAS data interpretation
are discussed.


title: Relativistic Bose gases at finite density

abstract:
  We consider a massive relativistic Bose gas with $N$ complex scalars at
finite density. At zero temperature, we calculate the pressure, charge density
and the speed of sound in the one-loop approximation. In the nonrelativistic
limit, we obtain the classic results for the dilute Bose gas. We also discuss
finite-temperature effects. In particular, we consider the problem of
calculating the critical temperature for Bose-Einstein condensation.
Dimensional reduction and effective-field-theory methods are used to
perturbatively calculate the effects of the nonstatic Matsubara modes.
Calculations of $T_c$ in the effective 3d theory require nonperturbative
methods. Using the Monte Carlo simulations of X. Sun [Phys. Rev. {\bf E67},
066702 (2003)] and the seven-loop variational perturbation theory (VPT)
calculations of B. Kastening [Phys. Rev. {\bf A70}, 043621 (2004)], we obtain
$T_c$ for N=2 to second order in the interaction.


title:
Partonic structure of the Nucleon in QCD and Nuclear Physics: new
  developments from old ideas

abstract:
  The nucleon is an ideal laboratory to solve QCD in the nonperturbative
regime. There are several experimental observations that still lack a rigorous
interpretation; they involve the nucleon as a (polarized) target as well as a
beam (in collisions and Drell-Yan processes). These data look like big
azimuthal and spin asymmetries, related to the transverse polarization and
momentum of the nucleon and/or the final detected particles. They suggest
internal reaction mechanisms that are suppressed in collinear perturbative QCD
but that are "natural" in Nuclear Physics: quark helicity flips, residual final
state interactions, etc.. In my talk, I will give a brief survey of the main
results and I will flash the most recent developments and measurements.


title: Supersymmetry at LHC and ILC

abstract:
  The prospects for the discovery and exploration of low-energy Supersymmetry
at future colliders, the Large Hadron Collider (LHC) and the future
international linear electron positron collider (ILC) are summarized. The focus
is on the experimental techniques that will be used to discover superpartners
and to measure their properties. Special attention is given to the question how
the results from both machines could influence each other, in particular when
they have overlapping running time.


title: Asymptotics and preasymptotics at small x

abstract:
  This talk discusses the relative impact of running-coupling and other
higher-order corrections on the small-x gluon-gluon splitting function.
Comments are made on similarities with some aspects of the Balitsky-Kovchegov
equation, which arise because of the presence of an effective infrared cutoff
in both cases. It is emphasised that, at least in the splitting-function case,
the asymptotic small-x behaviour has little relevance to the phenomenologically
interesting preasymptotic region. This is illustrated with the aid of a
convolution of the resummed splitting function with a toy gluon distribution.


title:
An approximation for NLO single Higgs boson inclusive transverse
  momentum distributions in hadron-hadron collisions

abstract:
  In the framework of the gluon-gluon fusion process for Higgs boson production
there are two different prescriptions. They are given by the exact process
where the gluons couple via top-quark loops to the Higgs boson and by the
approximation where the top-quark mass $m_t$ is taken to infinity. In the
latter case the coupling of the gluons to the Higgs boson is described by an
effective Lagrangian. Both prescriptions have been used for the $2 \to 2$ body
reactions to make predictions for Higgs boson production at hadron colliders.
In next-to-leading order only the effective Lagrangian approach has been used
to compute the single particle inclusive distributions. The exact computation
of the latter has not been done yet because the n-dimensional extensions of $2
\to 3$ processes are not calculated and the two-loop virtual corrections are
still missing. To remedy this we replace wherever possible the Born cross
sections in the asymptotic top-quark mass limit by their exact analogues. These
cross sections appear in the soft and virtual gluon contributions to the
next-to-leading order distributions. This approximation is inspired by the fact
that soft-plus-virtual gluons constitute the bulk of the higher order
correction. Deviations from the asymptotic top-quark mass limit are discussed.


title:
The QCD Pomeron in Ultraperipheral Heavy Ion Collisions: IV.
  Photonuclear Production of Vector Mesons

abstract:
  The photonuclear production of vector mesons in ultraperipheral heavy ion
collisions is investigated within the QCD color dipole picture, with particular
emphasis on the saturation model. The integrated cross section and the rapidity
distribution for the A + A --> V + A + A (V = rho, omega, phi, J/Psi) process
are computed and theoretical estimates for scattering on both light and heavy
nuclei are given for energies of RHIC and LHC. A comparison with the recent
STAR data on coherent production of rho mesons is also presented. Furthermore,
we calculate the photoproduction of vector mesons in proton-proton collisions
at RHIC, Tevatron and LHC energies.


title: Neutrinos And Big Bang Nucleosynthesis

abstract:
  The early universe provides a unique laboratory for probing the frontiers of
particle physics in general and neutrino physics in particular. The primordial
abundances of the relic nuclei produced during the first few minutes of the
evolution of the Universe depend on the electron neutrinos through the
charged-current weak interactions among neutrons and protons (and electrons and
positrons and neutrinos), and on all flavors of neutrinos through their
contributions to the total energy density which regulates the universal
expansion rate. The latter contribution also plays a role in determining the
spectrum of the temperature fluctuations imprinted on the Cosmic Background
Radiation (CBR) some 400 thousand years later. Using deuterium as a baryometer
and helium-4 as a chronometer, the predictions of BBN and the CBR are compared
to observations. The successes of, as well as challenges to the standard models
of particle physics and cosmology are identified. While systematic
uncertainties may be the source of some of the current tensions, it could be
that the data are pointing the way to new physics. In particular, BBN and the
CBR are used to address the questions of whether or not the relic neutrinos
were fully populated in the early universe and, to limit the magnitude of any
lepton asymmetry which may be concealed in the neutrinos.


title:
Light Sterile Neutrinos in the Supersymmetric U(1)' Models and Axion
  Models

abstract:
  We propose the minimal supersymmetric sterile neutrino model (MSSNM) where
the sterile neutrino masses are about 1 eV, while the active neutrino masses
and the mixings among the active and sterile neutrinos are generated during
late time phase transition. All the current experimental neutrino data include
the LSND can be explained simultaneously, and the constraints on the sterile
neutrinos from the big bang nucleosynthesis and large scale structure can be
evaded. To realize the MSSNM naturally, we consider the supersymmetric
intermediate-scale U(1)' model, the low energy U(1)' model with a secluded
U(1)'-breaking sector, and the DFSZ and KSVZ axion models. In these models, the
$\mu$ problem can be solved elegantly, and the 1 eV sterile neutrino masses can
be generated via high-dimensional operators. For the low energy U(1)' model
with a secluded U(1)'-breaking sector, we also present a scenario in which the
masses and mixings for the active and sterile neutrinos are all generated
during late time phase transition.


title:
Coupled-channels study of Lambda K and Sigma K states in the chiral
  SU(3) quark model

abstract:
  The $S$-wave $\Lambda K$ and $\Sigma K$ states with isospin $I=1/2$ are
dynamically investigated within the framework of the chiral SU(3) quark model
by solving a resonating group method (RGM) equation. The model parameters are
taken from our previous work, which gave a good description of the energies of
the baryon ground states, the binding energy of the deuteron, and the
experimental data of the nucleon-nucleon ($NN$) and nucleon-hyperon ($NY$)
scattering. Assumed not to give important contributions in the scattering
processes, the s-channel quark-antiquark ($q\bar q$) annihilation interactions
are not included as a first step. The results show a strong attraction between
$\Sigma$ and $K$, which consequently results in a $\Sigma K$ quasi-bound state
with about 17 MeV binding energy, unlike the case of $\Lambda K$ which is
unbound. When the channel coupling of $\Lambda K$ and $\Sigma K$ is considered,
a sharp resonance state near 1670 MeV with spin-parity $J^P=1/2^-$ is found.
The narrow gap of the $\Lambda K$ and $\Sigma K$ thresholds, the strong
attraction between $\Sigma$ and $K$, and the sizeable off-diagonal matrix
elements of $\Lambda K$ and $\Sigma K$ are responsible for the appearance of
this resonance.


title: How many quarks and leptons ?

abstract:
  There are eight quarks in each family and there are three families of quarks
i.e. c, b, t. Also, we propose similar structure for leptons. The nature of
strong force is named as `third order electroweak'.


title: The scalar radius of the pion

abstract:
  The pion scalar radius is given by $<r^2_S>=(6/\pi)\int_{4M^2_\pi}^\infty{\rm
d}s \delta_S(s)/s^2$, with $\delta_S$ the phase of the scalar form factor.
Below $\bar{K}K$ threshold, $\delta_S=\delta_\pi$, $\delta_\pi$ being the
isoscalar, S-wave $\pi\pi$ phase shift. At high energy, $s>2 {\rm GeV}^2$,
$\delta_S$ is given by perturbative QCD. In between I argued, in a previous
letter, that one can interpolate $\delta_S\sim\delta_\pi$, because inelasticity
is small, compared with the errors. This gives $<r^2_S>=0.75\pm0.07 {\rm
fm}^2$. Recently, Ananthanarayan, Caprini, Colangelo, Gasser and Leutwyler
(ACCGL) have claimed that this is incorrect and one should have instead
$\delta_S\simeq\delta_\pi-\pi$; then $<r^2_S>=0.61\pm0.04 {\rm fm}^2$. Here I
show that the ACCGL phase $\delta_S$ is pathological in that it is
discontinuous for small inelasticity, does not coincide with what perturbative
QCD suggests at high energy, and only occurs because these authors take a value
for $\delta_\pi(4m^2_K)$ different from what experiment indicates. If one uses
the value for $\delta_\pi(4m^2_K)$ favoured by experiment, the ensuing phase
$\delta_S$ is continuous, agrees with perturbative QCD expectations, and
satisfies $\delta_S\simeq\delta_\pi$, thus confirming the correctness of my
previous estimate,
  $<r^2_S>=0.75\pm0.07 {\rm fm}^2$.


title:
Analysis the $f_0(980)$ and $a_0(980)$ mesons as four-quark states with
  the QCD sum rules

abstract:
  In this article, we take the point of view that the scalar mesons $ f_0(980)$
and $a_0(980)$ are diquark-antidiquark states
$(qq)_{\bar{3}}(\bar{q}\bar{q})_3$, and devote to determine their masses in the
framework of the QCD sum rules approach with the interpolating currents
constructed from scalar-scalar type and pseudoscalar-pseudoscalar type diquark
pairs respectively. The numerical results indicate that the scalar mesons $
f_0(980)$ and $a_0(980)$ may have two possible diquark-antidiquark
substructures.


title: Some Comments on "Split" Supersymmetry

abstract:
  An argument against tolerating finetuning in the Higgs sector is presented,
by emphasizing the difference between (well understood) quantum corrections to
scalar masses and the (unsolved) problem of the cosmological constant. I also
point out that ``split'' supersymmetry, where all scalars except one Higgs
boson have masses many orders of magnitude above the weak scale, is not
compatible with simple mechanisms of transmitting supersymmetry breaking
(gravity, gauge or anomaly mediation), unless a second, independent finetuning
of parameters is introduced. This finetuning is required to obtain an
acceptable ratio of vacuum expectation values tan(beta).


title: pi pi scattering, pion form factors and chiral perturbation theory

abstract:
  I discuss recent progress in our understanding of the pi pi scattering
amplitude at low energy thanks to the combined use of chiral perturbation
theory and dispersion relations. I also comment on the criticism raised by
Pelaez and Yndurain on this work.


title: Can Chiral Symmetry Explain the Small Pentaquark Width?

abstract:
  It is shown that the decay amplitude for the Jaffe-Wilczek type pentaquarks
is not suppressed by chiral symmetry. On the other hand, pentaquarks of
positive or negative parity built up of an antiquark and two chirally different
diquarks in an $S$-state are stable in the limit of a strictly unbroken chiral
symmetry. These states can decay only via the spontaneous breaking of chiral
symmetry. However, this breaking is strong because of the sizeable magnitude of
the quark condensate. Thus, chiral symmetry cannot be the cause of a tiny decay
amplitude, even for pentaquarks which are stable in the strict chiral symmetry
limit.


title: Resonance production by neutrinos: I. J=3/2 Resonances

abstract:
  The article contains general formulas for the production of J=3/2 resonances
by neutrinos and antineutrinos. It specializes to the P_{33}(1232) resonance
whose form factors are determined by theory and experiment and then are
compared with experimental results at low and high energies. It is shown that
the minimum in the low Q^2 region is a consequence of a combined effect from
the vanishing of the vector form factors, the muon mass and Pauli blocking.
Several improvements for the future investigations are suggested.


title: The C-Odd Four-Gluon State in the Color Glass Condensate

abstract:
  The study of the perturbative Odderon at high gluon densities in the color
glass condensate requires to take into account states with more than three
gluons. We formulate evolution equations for these states in which the number
of gluons is not fixed during the evolution. We further determine the coupling
of these Odderon states to the gamma to eta_c impact factor for arbitrary
numbers of gluons. We find an exact solution of the evolution equation for the
four-gluon Odderon state in terms of the three-gluon Odderon state. It is shown
that a similar solution exists also for a different class of Odderon solutions
which does not couple to the gamma to eta_c impact factor. We discuss the
implications of our result from the perspective of constructing an effective
field theory of reggeized gluons for the color glass condensate.


title:
How much Uranium is in the Earth? Predictions for geo-neutrinos at
  KamLAND

abstract:
  Geo-neutrino detection can determine the amount of long-lived radioactive
elements within our planet, thus providing a direct test of the Bulk Silicate
Earth (BSE) model and fixing the radiogenic contribution to the terrestrial
heat. We present a prediction for the geo-neutrino signal at KamLAND as a
function of the Uranium mass in the Earth. The prediction is based on global
mass balance, supplemented by a detailed geochemical and geophysical study of
the region near the detector. The prediction is weakly dependent on mantle
modeling. If BSE is correct, Uranium geo-neutrinos will produce between 25 and
35 events per year and 10^32 protons at Kamioka.

categories: hep-ph astro-ph hep-ex nucl-ex physics.geo-ph


title: Antiproton-Proton Channels in J/psi Decays

abstract:
  The recent measurements by the BES Collaboration of J/psi decays into a
photon and a proton-antiproton pair indicate a strong enhancement at the
proton-antiproton threshold not observed in the decays into a neutral pion and
a proton-antiproton pair. Is this enhancement due to a proton-antiproton
quasi-bound state or a baryonium? A natural explanation follows from a
traditional model of proton-antiproton interactions based on G-parity
transformation. The observed proton-antiproton structure is due to a strong
attraction in the 1S0 state, and possibly to a near-threshold quasi-bound state
in the 11S0 wave.


title: Testing Lorentz Symmetry in Space

abstract:
  Atomic clocks, masers, and other precision oscillators are likely to be
placed on the International Space Station and other satellites in the future.
These instruments will have the potential to measure Lorentz-violation
coefficients, and in particular may provide access to parts of the
Lorentz-violation coefficient space at levels not accessible with Earth-based
experiments. The basic issues are outlined in this proceedings.


title:
Present status of the nonstrange and other flavor partners of the exotic
  Theta+ baryon

abstract:
  Given the existing empirical information about the exotic Theta+ baryon, we
analyze possible properties of its SU(3)F-partners, paying special attention to
the nonstrange member of the antidecuplet N*. The modified piN partial-wave
analysis presents two candidate masses, 1680 MeV and 1730 MeV. In both cases,
the N* should be rather narrow and highly inelastic. Our results suggest
several directions for experimental studies that may clarify properties of the
antidecuplet baryons, and structure of their mixing with other baryons. Recent
experimental evidence from the GRAAL and STAR Collaborations could be
interpreted as observations of a candidate for the Theta+ nonstrange partner.


title: Direct Estimate of the Gluon Polarization in the Nucleon

abstract:
  We make a first crude direct estimate of the net gluon polarization in the
proton, DeltaG, combining data on the asymmetries in high-p_T hadron production
from the HERMES, SMC and COMPASS collaborations. Although these data sample a
restricted range of x, they provide no hint that DeltaG is large. Fixing the
normalizations of different theoretical parametrizations using the hadron
asymmetry data, we find typical central values of DeltaG \sim 0.5, with
uncertainties of similar magnitude. Values of DeltaG \ge 2 are disfavoured by
Delta chi^2 \sim 9 to 20, depending on the parametrization used.


title: Two-meson cloud contribution to the baryon antidecuplet self-energy

abstract:
  We study the self-energy of the SU(3) antidecuplet coming from two-meson
virtual clouds. Assuming that the exotic Theta+ belongs to an antidecuplet
representation with N(1710) as nucleon partner, we derive effective Lagrangians
that describe the decay of N(1710) into N pi pi with two pions in s- or p-wave.
It is found that the self-energies for all members of the antidecuplet are
attractive, and the larger strangeness particle is more bound. From two-meson
cloud, we obtain about 20 % of the empirical mass splitting between states with
different strangeness.


title: Neutral pion decay into $\nu\bar{\nu}$ in dense skyrmion matter

abstract:
  We study the weak decay of the neutral pion to a neutrino-antineutrino pair,
$\pi^0\to \nu \bar{\nu}$, in the Skyrme model. In baryon free-space the process
is forbidden by helicity while in a dense baryonic medium, the process becomes
possible already to leading order in $G_F$ due to the break-down of Lorentz
symmetry in the background medium.


title: Neutrino Masses in the Composite Little Higgs Model

abstract:
  The composite little Higgs model, a UV completion for the $SU(5)/SO(5)$
little Higgs model, incorporates supersymmetry into strong gauge dynamics. We
extend the study of flavor physics in the model, and find that it is similar to
the bosonic technicolor model. Lepton flavor violations and neutrino mass
matrix arise once R-parity violating superpotential is introduced to the model,
as in the MSSM. We identify various low-energy effective $\Delta L=2$ lepton
flavor violating operators, and find that most of them are similar to those of
the R-parity violating MSSM. There is a new operator which involves only
leptons and the pseudo-Nambu Goldstone bosons of the little Higgs model. We
further study a possibility that this operator gives a dominant contribution to
the neutrino mass matrix.


title: $\pi\eta$ pair hard electroproduction and exotic hybrid mesons

abstract:
  We show that hard electroproduction is a promising way to study exotic hybrid
mesons, in particular through the hybrid decay channel $H \to \pi\eta $. We
discuss the $\pi\eta$ generalized distribution amplitude, calculate the
production amplitude and propose a forward-backward asymmetry as a signal for
the hybrid meson production.


title: Two-Loop Corrections to Bhabha Scattering

abstract:
  The two-loop radiative photonic corrections to the Bhabha scattering are
computed in the leading order of the small electron mass expansion up to
nonlogarithmic term. After including the soft photon bremsstrahlung we obtain
the infrared finite result for the differential cross section, which can be
directly applied to precise luminosity determination of the present and future
$e^+e^-$ colliders.


title: Strangeness observables and pentaquarks

abstract:
  We review the experimental evidence on firstly, strangeness production as a
signature for the QCD phase transition and secondly, pentaquarks, the latest
and most exotic manifestations of strangeness in hadrons.


title:
Ultraviolet Behavior of the Gluon Propagator in the Maximal Abelian
  Gauge

abstract:
  The ultraviolet asymptotic behavior of the gluon propagator is evaluated in
the maximal Abelian gauge in the SU(2) gauge theory on the basis of the
renormalization-group improved perturbation theory at the one-loop level.
Square-root singularities obtained in the Euclidean domain are attributed to
artifacts of the one-loop approximation in the maximal Abelian gauge and the
standard normalization condition for the propagator used in our study. It is
argued that this gauge is essentially nonperturbative.


title: Analysis of the $[{\bf 56},4^+]$ Baryon Masses in the $1/N_c$ Expansion

abstract:
  We use the $1/N_c$ expansion of QCD to analyze the spectrum of positive
parity resonances with strangeness $S = 0, -1, -2$ and -3 in the 2--3 GeV mass
region, supposed to belong to the $[\textbf{56},4^+]$ multiplet. We find that
the spin-spin term brings the dominant contribution and that the spin-orbit
term is entirely negligible in the hyperfine interaction, in agreement with
constituent quark model results. More data are strongly desirable, especially
in the strange sector in order to fully exploit the power of this approach.


title: Gluon Distributions and Fits using Dipole Cross-Sections

abstract:
  I investigate the relationship between the gluon distribution obtained using
a dipole model fit to low-x data on F_2(x,Q^2) and standard gluons obtained
from global fits with the collinear factorization theorem at fixed order. I
stress the necessity to do fits of this type carefully, and in particular to
include the contribution from heavy flavours to the inclusive structure
function. I find that the dipole cross-section must be rather steeper than the
gluon distribution, which at least partially explains why dipole model fits
produce dipole cross-sections growing quite strongly at small x, while DGLAP
based fits have valence-like, or even negative, small-x gluons as inputs.
However, I also find that the gluon distributions obtained from the dipole fits
are much too small to match onto the conventional DGLAP gluons at high Q^2,
i.e. approx 50 GeV^2, where the two approaches should coincide. The main reason
for this discrepancy is found to be the large approximations made in converting
the dipole cross-sections into structure functions using formulae which are
designed only for asymptotically small x. The shortcomings in this step affect
the accuracy of the extracted dipole cross-sections in terms of size and shape,
and hence also in terms of interpretation, at all scales.


title: String and Parton Percolation

abstract:
  A brief review to string and parton percolation is presented. After a short
introduction, the main consequences of percolation of color sources on the
following observables in A-A collisions: $J/\psi$ suppression, saturation of
the multiplicity, dependence on the centrality of the transverse momentum
fluctuations, Cronin effect and transverse momentum distributions, strength of
the two and three body Bose-Einstein correlations and forward-backward
multiplicity correlations, are presented. The behaviour of all of them can be
naturally explained by the clustering of color sources and the dependence of
the fluctuations of the number of these clusters on the density.


title: Quark-Hadron Duality in Structure Functions

abstract:
  Quark-hadron duality is studied in a systematic way for both the unpolarized
and polarized structure functions, by taking into account all the available
data in the resonance region.In both cases, a detailed perturbative QCD based
analysis of the structure functions integrals in the resonance region is
performed: non perturbative contributions are disentangled, and higher twist
terms are evaluated. A different behavior between the unpolarized and polarized
structure functions at low Q^2 is found.


title: Tests of Lorentz Violation in Atomic and Optical Physics

abstract:
  Atomic physics can probe the Lorentz and CPT symmetries at the Planck level.
Bounds on coefficients for Lorentz violation have been found using atomic
clocks, masers, electromagnetic cavities, and Penning traps, among others, and
in future it may be possible to place bounds using spectroscopy of antihydrogen
atoms. The CPT '04 Meeting on CPT and Lorentz Symmetry was held in August 2004
in Bloomington, Indiana, USA, and covered Lorentz violation in all branches of
physics. This report gives an overview of the recent advances in
Lorentz-symmetry studies in atomic and optical physics.


title: QCD and a Holographic Model of Hadrons

abstract:
  We propose a five-dimensional framework for modeling low-energy properties of
QCD. In the simplest three parameter model we compute masses, decay rates and
couplings of the lightest mesons. The model fits experimental data to within
10%. The framework is a holographic version of the QCD sum rules, motivated by
the anti-de Sitter/conformal field theory (AdS/CFT) correspondence. The model
naturally incorporates properties of QCD dictated by chiral symmetry, which we
demonstrate by deriving the Gell-Mann-Oakes-Renner relationship for the pion
mass.


title: A Supersymmetry Model of Leptons

abstract:
  If supersymmetry (SUSY) is not for stabilizing the electroweak energy scale,
what is it used for in particle physics? We propose that it is for flavor
problems. A cyclic family symmetry is introduced. Under the family symmetry,
only the $\tau$-lepton is massive due to the vacuum expectation value (VEV) of
the Higgs field. This symmetry is broken by a sneutrino VEV which results in
the muon mass. The comparatively large sneutrino VEV does not result in a large
neutrino mass due to requiring heavy gauginos. SUSY breaks at a high scale
$\sim 10^{13}$ GeV. The electroweak energy scale is unnaturally small. No
additional global symmetry, like the R-parity, is imposed. Other aspects of the
model are discussed.


title:
Fully differential Higgs boson production and the di-photon signal
  through next-to-next-to-leading order

abstract:
  We describe a calculation of the fully differential cross section for Higgs
boson production in the gluon fusion channel through next-to-next-to-leading
order (NNLO) in perturbative QCD. The decay of the Higgs boson into two photons
is included. Technical aspects of the computation are discussed in detail. The
implementation of the calculation into a numerical code, called FEHiP, is
described. The NNLO K-factors for completely realistic photon acceptances and
isolation cuts, including those employed by the ATLAS and CMS collaborations,
are computed. We study various distributions of the photons from Higgs decay
through NNLO.


title:
Flavor changing scalar couplings and $t\gamma(Z)$ production at hadron
  colliders

abstract:
  We calculate the contributions of the flavor changing scalar ($FCS$)
couplings arised from topcolor-assisted technicolor ($TC2$) models at
tree-level to the $t\gamma$ and $tZ$ production at the Tevatron and $LHC$
experiments. We find that the production cross sections are very small at the
Tevatron with $\sqrt{s}=1.96TeV$, which is smaller than 5 fb in most of the
parameter space of $TC2$ models. However, the virtual effects of the $FCS$
couplings on the $t\gamma(Z)$ production can be easily detected at the $LHC$
with $\sqrt{s}=14TeV$ via the final state $\gamma l\bar{\nu}b$
($l^{+}l^{-}l\bar{\nu}b$).


title: TSIL: a program for the calculation of two-loop self-energy integrals

abstract:
  TSIL is a library of utilities for the numerical calculation of dimensionally
regularized two-loop self-energy integrals. A convenient basis for these
functions is given by the integrals obtained at the end of O.V. Tarasov's
recurrence relation algorithm. The program computes the values of all of these
basis functions, for arbitrary input masses and external momentum. When
analytical expressions in terms of polylogarithms are available, they are used.
Otherwise, the evaluation proceeds by a Runge-Kutta integration of the coupled
first-order differential equations for the basis integrals, using the external
momentum invariant as the independent variable. The starting point of the
integration is provided by known analytic expressions at (or near) zero
external momentum. The code is written in C, and may be linked from C, C++, or
Fortran. A Fortran interface is provided. We describe the structure and usage
of the program, and provide a simple example application. We also compute two
new cases analytically, and compare all of our notations and conventions for
the two-loop self-energy integrals to those used by several other groups.


title: Instanton vacuum beyond chiral limit

abstract:
  In this talk it is discussed the derivation of low-frequencies part of quark
determinant and partition function. As a first application, quark condensate is
calculated beyond chiral limit with the account of O(m), O(1/N_c), O(1/N_c m)
and O(1/N_c m ln m) corrections. It is demonstrated complete correspondence of
the results to chiral perturbation theory.


title: How can we make sure we detect dark matter?

abstract:
  More and more claims of having detected WIMP dark matter are being put
forward. Some are discussed here, stressing the importance of exploiting
distinctive signatures to ascertain their WIMP origin. The best signals for
WIMP discovery are characterized by special features that make them
recognizable as due to WIMPs and nothing else. Sometimes, however, a single
feature, although accountable for in theoretical models, may not be enough to
make sure that we have detected WIMPs. This is because the theory of WIMPs and
their distribution in the galaxy is still very uncertain, and allows for many
possibilities. What are needed are experimental verifications of the claimed
signals, either by discovering unmistakable features, or by detecting several
kinds of signals that can all be explained by the same WIMP model.


title: Determination of the parity of the pentaquark baryons : Theta^+ and Xi_5

abstract:
  We study determination of the parity of the pentaquark baryons in two
different processes. First, we investigate the Theta^+ production via the
vec{p} vec{p} -> Sigma^+ Theta^+ reaction process which was proposed to
determine unambiguously the parity of Theta^+. We observe the clear differences
in the total cross sections and the spin observable A_{xx}. As for the Xi_5 in
the bar{K} N -> K Xi_5 reaction process, the total cross section for the
positive parity presents about one hundred times lager than that of the
negative one due to the huge destructive interference.


title: Renormalization programme for effective theories

abstract:
  We summarize our latest developments in perturbative treating the effective
theories of strong interactions. We discuss the principles of constructing the
mathematically correct expressions for the S-matrix elements at a given loop
order and briefly review the renormalization procedure. This talk shall provide
the philosophical basement as well as serve as an introduction for the material
presented at this conference by A. Vereshagin and K. Semenov-Tian-Shansky.


title:
Explicit equations for renormalization prescriptions in the case of
  pion-nucleon scattering

abstract:
  This talk is a natural continuation of that given by V.Vereshagin at this
conference. We discuss some details not covered in that talk and review the
calculational technique using the (\pi N)-elastic scattering as an example.
Finally, we briefly mention some results of numerical comparison with
experimental data. More technical details can be found in the talk by
K.Semenov-Tian-Shansky (this conference)devoted to the analysis of elastic KN
scattering.


title:
Renormalization in effective theories: prescriptions for kaon-nucleon
  resonance parameters

abstract:
  In this talk we show how it is possible to apply the general scheme of
effective scattering theory to the description of hadronic processes. We
perform the numerical tests of the tree level bootstrap constraints for
renormalization prescriptions in the case of elastic kaon-nucleon scattering
process.


title: Higgs bosons in the NMSSM with exact and slightly broken PQ-symmetry

abstract:
  We explore the Higgs sector of the NMSSM in the limit when the Peccei--Quinn
symmetry is exact or only slightly broken. In this case the Higgs spectrum has
a hierarchical structure which is caused by the stability of the physical
vacuum. We find a strong correlation between the parameters of the NMSSM if
$\kappa=0$ or $\kappa\lesssim \lambda^2$. It allows one to distinguish the
NMSSM with exact or softly broken PQ-symmetry from the MSSM even when extra
scalar and pseudoscalar Higgs states escape direct detection.