title:
Mass and Width of the Rho Meson in a Nuclear Medium from Brown-Rho
  Scaling and QCD Sum Rules

abstract:
  We explore the range of values of the in-medium width of a $\rho$-meson at
rest which is compatibale with the QCD sum rule approach in a nuclear medium
assuming vector meson dominance and a Brown-Rho scaling law of the $\rho$-meson
mass with the chiral condensate. The lower and upper bounds for the in-medium
width are found to be strongly increasing with the decreasing mass of the
$\rho$-meson (increasing nuclear density). We also study the bounds for the
in-medium width in models not satisfying the Brown-Rho scaling law. It is shown
that the in-medium width depends on how rapidly the mass decreases in
comparison to the change of the quark condensate. The bounds for the in-medium
width increase with density only if the relative change of the quark condensate
is stronger than the relative decrease in mass. This is important for
experimental tests of the Brown-Rho scaling paradigm and other dropping
$\rho$-mass scenarios.


title: The Role of the ILC in the Study of Cosmic Dark Matter

abstract:
  Though there is strong evidence that dark matter is a major component of the
universe, most aspects of dark matter are completely mysterious. We do not know
what dark matter is, and we do not know how it is distributed in our galaxy. To
resolve these and related questions, we will need information both from
particle physics and from astrophysics. In this article, we will describe a
path toward the solution of the problems of dark matter, and we will highlight
the important role that the ILC has to play in this study.


title:
Probing the Earth's interior with a large-volume liquid scintillator
  detector

abstract:
  A future large-volume liquid scintillator detector would provide a
high-statistics measurement of terrestrial antineutrinos originating from
$\beta$-decays of the uranium and thorium chains. In addition, the forward
displacement of the neutron in the detection reaction $\bar\nu_e+p\to n+e^+$
provides directional information. We investigate the requirements on such
detectors to distinguish between certain geophysical models on the basis of the
angular dependence of the geoneutrino flux. Our analysis is based on a
Monte-Carlo simulation with different levels of light yield, considering both
unloaded and gadolinium-loaded scintillators. We find that a 50 kt detector
such as the proposed LENA (Low Energy Neutrino Astronomy) will detect
deviations from isotropy of the geoneutrino flux significantly. However, with
an unloaded scintillator the time needed for a useful discrimination between
different geophysical models is too large if one uses the directional
information alone. A Gd-loaded scintillator improves the situation
considerably, although a 50 kt detector would still need several decades to
distinguish between a geophysical reference model and one with a large neutrino
source in the Earth's core. However, a high-statistics measurement of the total
geoneutrino flux and its spectrum still provides an extremely useful glance at
the Earth's interior.


title: Randall-Sundrum with AdS(7)

abstract:
  In the same sense that AdS_5 warped geometries arise naturally from Type IIB
string theory with stacks of D3 branes, AdS_7 warped geometries arise naturally
from M theory with stacks of M5 branes. We compactify two spatial dimensions of
AdS_7 to get AdS_5 X Sigma^2, where the metric for Sigma^2 inherits the same
warp factor as appears in the AdS_5. We analyze the 5d spectrum in detail for
the case of a bulk scalar or a graviton in AdS_5 X T^2, in a setup which mimics
the first Randall-Sundrum model. The results display novel features which might
be observed in experiments at the CERN Large Hadron Collider. For example, we
obtain TeV scale string winding states without lowering the string scale. This
is due to the double warping which is a generic feature of winding states along
compactified AdS directions. Experimental verification of these signatures of
AdS_7 could be interpreted as direct evidence for M theory.


title: Fluctuation effects in high-energy QCD

abstract:
  The recent high-energy QCD equations including the effects of fluctuations
are solved numerically. We discuss their asymptotic properties and compare them
with the corresponding behaviour without fluctuations as well as with the
statistical-physics model obtained in the saddle point approximation. The
potential consequences on phenomenology, particularly on geometric scaling
violations, are drawn.


title: Summary Talk on Quark-Hadron Duality

abstract:
  I ascribe the origin of Bloom-Gilman duality in DIS to a separation of scales
between the hard subprocess and soft resonance formation. The success of
duality indicates that the subprocesses of exclusive form factors are the same
as in DIS. The observed dominance of the longitudinal structure function at
large x in \pi N \to \mu^+\mu^- X can explain why local duality works for DIS
with a pion target. The failure of duality in semi-exclusive processes
indicates that high momentum transfer t is not sufficient to make the
corresponding subprocesses compact.


title: Some properties of the newly observed X(1835) state at BES

abstract:
  Recently the BES collaboration has announced observation of a resonant state
in the $\pi^+\pi^- \eta'$ spectrum in $J/\psi \to \gamma \pi^+\pi^-\eta'$
decay. Fitting the data with a $0^{-+}$ state, the mass is determined to be
1833.7 MeV with $7.7\sigma$ statistic significance. This state is consistent
with the one extracted from previously reported $p \bar p$ threshold
enhancement data in $J/\psi \to \gamma p \bar p$. We study the properties of
this state using QCD anomaly and QCD sum rules assuming X(1835) to be a
pseudoscalar and show that it is consistent with data. We find that this state
has a sizeable matrix element $<0|G\tilde G|G_p>$ leading to branching ratios
of $(2.61\sim 7.37)\times 10^{-3}$ and $(2.21\sim 10.61)\times 10^{-2}$ for
$J/\psi \to \gamma G_p$ and for $G_p \to \pi^+\pi^- \eta'$, respectively.
Combining the calculated branching ratio of $J/\psi \to \gamma G_p$ and data on
threshold enhancement in $J/\psi \to \gamma p \bar p$, we determine the
coupling for $G_p- p-\bar p$ interaction. We finally study branching ratios of
other $J/\psi \to \gamma + {three mesons}$ decay modes. We find that $J/\psi
\to \gamma G_p \to \gamma (\pi^+\pi^- \eta, K K \pi^0)$ can provide useful
tests for the mechanism proposed.


title: Reduction schemes for one-loop tensor integrals

abstract:
  We present new methods for the evaluation of one-loop tensor integrals which
have been used in the calculation of the complete electroweak one-loop
corrections to e+ e- -> 4 fermions. The described methods for 3-point and
4-point integrals are, in particular, applicable in the case where the
conventional Passarino-Veltman reduction breaks down owing to the appearance of
Gram determinants in the denominator. One method consists of different variants
for expanding tensor coefficients about limits of vanishing Gram determinants
or other kinematical determinants, thereby reducing all tensor coefficients to
the usual scalar integrals. In a second method a specific tensor coefficient
with a logarithmic integrand is evaluated numerically, and the remaining
coefficients as well as the standard scalar integral are algebraically derived
from this coefficient. For 5-point tensor integrals, we give explicit formulas
that reduce the corresponding tensor coefficients to coefficients of 4-point
integrals with tensor rank reduced by one. Similar formulas are provided for
6-point functions, and the generalization to functions with more internal
propagators is straightforward. All the presented methods are also applicable
if infrared (soft or collinear) divergences are treated in dimensional
regularization or if mass parameters (for unstable particles) become complex.


title:
Non-Concave Bare Actions with Concave Effective Actions I: Zero
  Dimensions

abstract:
  We perform an explicit computation of the effective action for a few
zero-dimensional Euclidean field theories in which the bare action exhibits
several (or infinitely many) minima. In all cases the effective action is
well-defined for all field values, as well as purely concave, in contrast to
the bare action. We give arguments against the validity of the naive
perturbative approach, which would lead to spontaneous symmetry breaking.


title: B^-_c->\eta' \ell^- \bar{\nu} decay and lepton polarization asymmetry

abstract:
  In this paper we study the lepton polarization asymmetry for the simileptonic
OZI-forbidden annihilation B^-_c->\eta' \ell^- \bar{\nu} decay where \ell=\mu,
\tau. Our results show that the branching ratio turn out to be of order
10^{-4}. Beside, we find that longitudinal, transversal and normal components
of lepton polarizations can be measured for both \mu and \tau decay modes in
the future experiments at the LHC.


title: Matching meson resonances to OPE in QCD

abstract:
  We investigate the possible corrections to the linear Regge trajectories for
the light-quark meson sector by matching two-point correlators of quark
currents to the Operator Product Expansion. We find that the allowed
modifications to the linear behavior must decrease rapidly with the principal
quantum number. After fitting the lightest states in each channel and certain
low-energy constants the whole spectrum for meson masses and residues is
obtained in a satisfactory agreement with phenomenology. The perturbative
corrections to our results are discussed.


title: KKbar photoproduction from protons

abstract:
  We study the contribution of the Drell mechanism driven by K^+ and K^-
exchange to the reaction gamma N -> KKbar N. Our calculation implements the
full KN and KbarN reaction amplitudes in the form of partial wave amplitudes
taken from a meson-exchange model (KN) and a partial wave analysis (KbarN),
respectively. Comparing our results to data of the LAMP2 collaboration we
observe that the Drell mechanism alone cannot describe the large Lambda(1520)
photoproduction rate observed experimentally. We argue that the discrepancy
could be due to significant contributions from K*-meson exchange with
subsequent excitation of the Lambda(1520) resonance. After adding such
contributions to our model a good agreement of the LAMP2 experiment is
achieved. When applying the same model to the recent SAPHIR data we find an
excellent description of the K^+p spectrum and can determine the parameters of
the Lambda(1600) P01 resonance, M_R = 1617 +/- 2 MeV and Gamma_R = 117 +/- 4
MeV, from the K^-p mass distribution.


title: QCD matter within a quasi-particle model and the critical end point

abstract:
  We compare our quasi-particle model with recent lattice QCD results for the
equation of state at finite temperature and baryo-chemical potential. The
inclusion of the QCD critical end point into models is discussed. We propose a
family of equations of state to be employed in hydrodynamical calculations of
particle spectra at RHIC energies and compare with the differential azimuthal
anisotropy of strange and charm hadrons.


title: On sgoldstino interpretation of HyperCP events

abstract:
  We discuss possible sgoldstino interpretation of the observation, reported by
HyperCP collaboration, of three $\Sigma^+\to p\mu^+\mu^-$ decay events with
dimuon invariant mass 214.3 MeV within detector resolution. We find that this
interpretation is consistent in models with (i) parity conservation in
sgoldstino interactions, (ii) pseudoscalar sgoldstino $P$ of mass 214 MeV and
heavier scalar sgoldstino, and (iii) low supersymmetry breaking scale, \sqrt{F}
= 2.5-60 TeV. In these models, sgoldstino can be observed in decays
$K^+\to\pi^+\pi^0 P$, $K_L\to\pi\pi P$ and $K_S\to\pi\pi P$ at the branching
ratios of at least of order 10^{-12}, 10^{-8} and 10^{-11}, respectively.
  The model can be probed also at e^+e^- colliders in the channels
$e^+e^-\to\gamma P$ and $e^+e^-\to e^+e^-P$, where the cross section is likely
to be in the range 1 pb - 5 ab.


title: Lorentz-violating brane worlds and cosmological perturbations

abstract:
  We consider an inflating brane-world setup in which 4-dimensional
Lorentz-invariance is violated at high 3-momentum scale $P_{LV} \gg H$, where
$H$ is the inflationary Hubble parameter. We study massless scalar field in
this background as a model for cosmological perturbations. Towards the end of
inflation, the spectrum has both the standard, 4-dimensional part due to a
brane-localized mode, and exotic, bulk induced contribution. The suppression of
the latter is power-law only, $(H/P_{LV})^\alpha$, provided that there exist
bulk modes with energies $\omega \ll H$. Contrary to general expectations, the
exponent $\alpha$ may be smaller than 2, and even smaller than 1, depending on
details of the bulk geometry. Furthermore, the overall amplitude of the
bulk-induced perturbations is enhanced as compared to the standard part, so the
effects due to Lorentz-violation may dominate over the standard mechanism even
for $P_{LV} \gg H$.


title: Born order study of gamma*gamma* -> rho rho at very high energy

abstract:
  We calculate the cross-section for the diffractive exclusive process gamma*_L
(Q_1^2) gamma*_L(Q_2^2) -> rho^0_L rho^0_L, in view of its study in the future
high energy e+e- linear collider. The Born order approximation of the amplitude
is completely calculable in the hard region Q_1, Q_2 >> Lambda_QCD. The
resulting cross-section is large enough for this process to be measurable with
foreseen luminosity and energy, for Q_1 and Q_2 in the range of a few GeV.


title:
Sensitivity of the chiral phase transition of QCD to the scalar meson
  sector

abstract:
  Gribov's theory of light quark confinement implies the existence of two kinds
of scalar bound states. The phase diagram of the three-flavor QCD is mapped out
in the (m_pi-m_K)-plane with help of the SU_L(3)xSU_R(3) linear sigma model
supplemented with the assumption that the masses of the so-called superbound
scalars do not change under the variation of the pion and kaon mass. The phase
boundary along the m_pi=m_K line is found in the interval 15 MeV<m_crit<25 MeV,
irrespective which f_0-sigma linear combination is identified with the pure
superbound state.


title: Probing the Higgs Field Using Massive Particles as Sources and Detectors

abstract:
  In the Standard Model, all massive elementary particles acquire their masses
by coupling to a background Higgs field with a non-zero vacuum expectation
value. What is often overlooked is that each massive particle is also a source
of the Higgs field. A given particle can in principle shift the mass of a
neighboring particle. The mass shift effect goes beyond the usual perturbative
Feynman diagram calculations which implicitly assume that the mass of each
particle is rigidly fixed. Local mass shifts offer a unique handle on Higgs
physics since they do not require the production of on-shell Higgs bosons. We
provide theoretical estimates showing that the mass shift effect can be large
and measurable, especially near pair threshold, at both the Tevatron and the
LHC.


title: Explicitly broken lepton number at low energy in the Higgs triplet model

abstract:
  We suppose that lepton number is explicitly broken at low energy scale(M) in
the framework of the Higgs triplet($\Delta$) model. The scalar sector of the
model is developed considering the particular assumption $M=v_\Delta \approx$
eV. We show that such assumption infers a particular mass spectrum for the
scalars that compose the triplet and cause a decoupling of these scalars from
those that compose the standard scalar doublet.


title:
Hadronization -- the Unsung Hero rather than the Alleged Villain in the
  Tale of CP Violation

abstract:
  The novel successes scored by the Standard Model of High Energy Physics in
the last few years concerning heavy flavour dynamics do not weaken the case for
`New Physics' around the TeV scale. They do suggest however that one cannot
{\em count} on that New Physics impacting heavy flavour decays in a numerically
massive way. Yet studying this impact will be essential in diagnosing the
features of the New Physics. In particular the decays of beauty hadrons have to
be analyzed with considerable precision on the experimental as well as
theoretical side. While hadronization effects often represent the main
bottleneck in our understanding in the short run, they will provide powerful
and discriminating tools in the long run, when applied comprehensively and
judiciously. The expertise required to exhaust the discovery potential in $B$
decays does exist in the hadron physics community or can be developed without
needing a new breakthrough -- yet a greater effort has to be made to
communicate it to the heavy flavour community.


title: Complex Plasmas as a Model for the Quark-Gluon-Plasma Liquid

abstract:
  The quark-gluon plasma, possibly created in ultrarelativistic heavy-ion
collisions, is a strongly interacting many-body parton system. By comparison
with strongly coupled electromagnetic plasmas (classical and non-relativistic)
it is concluded that the quark-gluon plasma could be in the liquid phase. As an
example for a strongly coupled plasma, complex plasmas, which show liquid and
even solid phases, are discussed briefly. Furthermore, methods based on
correlation functions for confirming and investigating the quark-gluon-plasma
liquid are presented. Finally, consequences of the strong coupling, in
particular a cross section enhancement in accordance with experimental
observations at RHIC, are discussed.


title: Symmetry relations in charmless B->PPP decays

abstract:
  Strangeness-changing decays of $B$ mesons to three-body final states of pions
and kaons are studied, assuming that they are dominated by a $\Delta I=0$
penguin amplitude with flavor structure $\bar b \to \bar s$. Numerous isospin
relations for $B\to K\pi\pi$ and for underlying quasi-two-body decays are
compared successfully with experiment, in some cases resolving ambiguities in
fitting resonance parameters. The only exception is a somewhat small branching
ratio noted in $B^0\to K^{*0}\pi^0$, interpreted in terms of destructive
interference between a penguin amplitude and an enhanced electroweak penguin
contribution. Relations for B decays into three kaons are derived in terms of
final states involving $K_S$ or $K_L$, assuming that $\phi K$-subtracted decay
amplitudes are symmetric in $K$ and $\bar K$, as has been observed
experimentally. Rates due to nonresonant backgrounds are studied using a simple
model, which may reduce discrete ambiguities in Dalitz plot analyses.


title:
Pitfalls of the theory of Bose-Einstein correlations in multiple
  particle production

abstract:
  Some basic difficulties and ambiguities on the way from the measured momentum
distributions to the inferred properties of the interaction regions are
reviewed and discussed.


title: Two-Loop Electroweak Logarithms in Four-Fermion Processes at High Energy

abstract:
  We present the complete analytical result for the two-loop logarithmically
enhanced contributions to the high energy asymptotic behavior of the vector
form factor and the four-fermion cross section in a spontaneously broken SU(2)
gauge model. On the basis of this result we derive the dominant two-loop
electroweak corrections to the neutral current four-fermion processes at high
energies. Previously neglected effects of the gauge boson mass difference are
included through the next-to-next-to-leading logarithmic approximation.


title: On the A-dependence of nuclear generalized parton distributions

abstract:
  We perform a microscopic evaluation of nuclear GPDs for spin-0 nuclei in the
framework of the Walecka model. We demonstrate that the meson (non-nucleon)
degrees of freedom dramatically influence nuclear GPDs, which is revealed in
the non-trivial and unexpected A-dependence of DVCS observables. In particular,
we find that the first moment of the nuclear D-term, d_A(0) ~ A^2.26, which
confirms the earlier prediction of M.Polyakov. We find that in the HERMES
kinematics, contrary to the free proton case, the nuclear meson degrees of
freedom in large nuclei enhance the nuclear DVCS amplitude which becomes
comparable to the Bethe-Heitler amplitude, and, thus, give the non-trivial
A-dependence to the DVCS asymmetries: as a function of the atomic number the
beam-charge asymmetry increases whereas the beam-spin asymmetry decreases
slowly.


title: Physics at Future Linear Colliders

abstract:
  This article summarises the physics at future linear colliders. It will be
shown that in all studied physics scenarios a 1 TeV linear collider in addition
to the LHC will enhance our knowledge significantly and helps to reconstruct
the model of new physics nature has chosen.


title: Probing the Universal Randall-Sundrum Model at the ILC

abstract:
  The Randall-Sundrum model with all Standard Model (SM) fields in the bulk,
including the Higgs, can be probed by precision measurements at the ILC. In
particular, the couplings of the Higgs to the gauge bosons of the SM can be
determined with high accuracy at the ILC. Here we examine the deviations in
these couplings from their SM values within the framework of the Universal
Randall-Sundrum Model (URSM) as well as the corresponding couplings of the
first Higgs Kaluza-Klein excitation.


title:
Event shape discrimination of supersymmetry from large extra dimensions
  at a linear collider

abstract:
  The production of a charged lepton (e/mu) pair with a large missing energy at
a linear collider is discussed as a means of distinguishing the minimal
supersymmetry (MSSM) scenario from that with large extra dimensions (ADD) for
parameter ranges where the total cross sections are comparable for both.
Analyses in terms of event shape variables, specifically sphericity and thrust,
are shown to enable a clear discrimination in this regard.


title: On the study of quark confinement and the relativistic flux tube model

abstract:
  The scalar potential, time component vector potential and flux tube quark
confinements are studied in this paper. We find that the predictions of scalar
confinement and time component vector confinement are in considerable conflict
with measured values while the flux-tube confinement works well to explain the
experimental data. We also study the relativistic flux tube model. From the
comparison of the exact numerical solution with the analytic approximation
solution for heavy-light mesons, we find that the solutions are much more in
agreement with each other for higher excited states since the deep radial limit
is better satisfied.


title: Confronting mass-varying neutrinos with MiniBooNE

abstract:
  We study the proposal that mass-varying neutrinos could provide an
explanation for the LSND signal for \bar\nu_mu to \bar\nu_e oscillations. We
first point out that all positive oscillation signals occur in matter and that
three active mass-varying neutrinos are insufficient to describe all existing
neutrino data including LSND. We then examine the possibility that a model with
four mass-varying neutrinos (three active and one sterile) can explain the LSND
effect and remain consistent with all other neutrino data. We find that such
models with a 3+1 mass structure in the neutrino sector may explain the LSND
data and a null MiniBooNE result for 0.10 < \sin^2 2\theta_x < 0.30.
Predictions of the model include a null result at Double-CHOOZ, but positive
signals for underground reactor experiments and for \nu_\mu to \nu_e
oscillations in long-baseline experiments.


title:
Resolve the Neutrino Parameter Degeneracies with the T2K Off-axis Beam
  and the Large Detector in Korea

abstract:
  In this talk, we show the physics impacts of putting a large Water Cerenkov
detector in Korea during the T2K experimental period. The T2K experiment which
will start in 2009 plans to use the high intensity conventional neutrino beam
from J-PARC at Tokai village, Japan. The center of this beam will reach the sea
level between Japan and Korea, and an off-axis beam at 0.5^o to 1.0^o can be
observed in Korea. For a combination of the 3^o off-axis beam at SK with
baseline length L=295km and the 0.5^o off-axis beam in the east coast of Korea,
near Gyeongju, at L=1000km, we find that the neutrino mass hierarchy (the sign
of the larger mass-squared difference) can be resolved and the CP phase of the
MNS unitary matrix can be constrained uniquely at 3-sigma level when
sin^2(2theta_rct) simgt 0.06.


title: Deconstructed Higgsless Models

abstract:
  We consider the possibility of constructing realistic Higgsless models within
the context of deconstructed or moose models. We show that the constraints
coming from the electro-weak esperimental data are very severe and that it is
very difficult to reconcile them with the requirement of improving the
unitarity bound of the Higgsless Standard Model. On the other hand, with some
fine tuning, a solution is found by delocalizing the standard fermions along
the lattice line, that is allowing the fermions to couple to the moose gauge
fields.


title: Charm meson resonances in D semileptonic decays

abstract:
  Motivated by recent experimental results we reconsider semileptonic D to P l
nu_l and D to V l nu_l decays within a model which combines heavy quark
symmetry and properties of the chiral Lagrangian. Using limits of soft
collinear effective theory and heavy quark effective theory we parametrize the
semileptonic form factors. We include excited charm meson states in our
Lagrangians and determine their impact on the charm meson semileptonic form
factors. Then we calculate branching ratios for all D to P l nu_l and D to V l
nu_l decays.


title:
The B --> pi form factor from light-cone sum rules in soft-collinear
  effective theory

abstract:
  Recently, we have derived light-cone sum rules for exclusive B-meson decays
into light energetic hadrons from correlation functions within soft-collinear
effective theory. In these sum rules the short-distance scale refers to
``hard-collinear'' interactions with virtualities of order \Lambda_{QCD} m_b.
Hard scales (related to virtualities of order m_b^2) are integrated out and
enter via external coefficient functions in the sum rule. Soft dynamics is
encoded in light-cone distribution amplitudes for the B-meson, which describe
both the factorizable and non-factorizable contributions to exclusive B-meson
decay amplitudes. Factorization of the correlation function has been verified
to one-loop accuracy. Thus, a systematic separation of hard, hard-collinear,
and soft dynamics in the heavy-quark limit is possible.


title: Production of Long-Lived Sleptons at LHC

abstract:
  We analyse the MSSM parameter space and discuss the narrow band near the
so-called co-annihilation region where sleptons may be long-lived particles.
This region is consistent with the WMAP restrictions on the Dark matter and
depends on the value of $\tan\beta$. In this region staus are long-lived and
may go through the detector. Due to a relatively small mass (150 $\div$ 850
GeV) their production cross-section at LHC may reach a few % pb.


title: Euclidean formulation of diffractive scattering

abstract:
  After a brief review (in the first part) of some relevant properties of the
high-energy parton-parton scattering amplitudes, in the second part we shall
discuss the infrared finiteness and some analyticity properties of the
loop-loop scattering amplitudes in gauge theories, when going from Minkowskian
to Euclidean theory, and we shall see how they can be related to the still
unsolved problem of the s-dependence of the hadron-hadron total cross-sections.


title: On the distribution of partons in the transverse plane

abstract:
  Elastic nucleon form factors constrain the spatial distribution of quarks in
the impact parameter plane. A recent analysis found that the average impact
parameter of quarks strongly depends on their longitudinal momentum, and
obtained an estimate of the orbital angular momentum carried by valence quarks
in the proton.


title:
Top squark and neutralino decays in a R-parity violating model
  constrained by neutrino oscillation data

abstract:
  In a R-parity violating (RPV) model of neutrino mass with three bilinear
couplings $\mu_i$ and three trilinear couplings $\lambda'_{i33}$, where $i$ is
the lepton index, we find six generic scenarios each with a distinctive pattern
of the trilinear couplings consistent with the oscillation data. These patterns
may be reflected in direct RPV decays of the lighter top squark or in the RPV
decays of the lightest superparticle, assumed to be the lightest neutralino.
  Typical signal sizes at the Tevatron RUN II and the LHC have been estimated
and the results turn out to be encouraging.


title:
Extensive study of phase diagram for charge neutral homogeneous quark
  matter affected by dynamical chiral condensation -- unified picture for
  thermal unpairing transitions from weak to strong coupling --

abstract:
  We study the phase structures of charge neutral quark matter under the
beta-equilibrium for a wide range of the quark-quark coupling strength within a
four-Fermion model. A comprehensive and unified picture for the phase
transitions from weak to strong coupling is presented. We first develop a
technique to deal with the gap equation and neutrality constraints without
recourse to numerical derivatives, and show that the off-diagonal color
densities automatically vanish with the standard assumption for the diquark
condensates. The following are shown by the numerical analyses: (i) The
thermally-robustest pairing phase is the two-flavor pairing (2SC) in any
coupling case, while the second one for relatively low density is the up-quark
pairing (uSC) phase or the color-flavor locked (CFL) phase depending on the
coupling strength and the value of strange quark mass. (ii) If the diquark
coupling strength is large enough, the phase diagram is much simplified and is
free from the instability problems associated with imaginary Meissner masses in
the gapless phases. (iii) The interplay between the chiral and diquark dynamics
may bring a non-trivial first order transition even in the pairing phases at
high density. We confirm (i) also by using the Ginzburg-Landau analysis
expanding the pair susceptibilities up to quartic order in the strange quark
mass. We obtain the analytic expression for the doubly critical density where
the two lines for the second order phase transitions merge, and below which the
down-quark pairing (dSC) phase is taken over by the uSC phase. Also we study
how the phase transitions from fully gapped states to partially ungapped states
are smeared at finite temperature by introducing the order parameters for these
transitions.


title:
Dark matter from the scalar sector of 3-3-1 models without exotic
  electric charges

abstract:
  We show that three SU(2) singlet neutral scalars (two CP-even and one CP-odd)
in the spectrum of models based on the gauge symmetry SU(3)_c X SU(3)_L X
U(1)_X, which do not contain exotic electric charges, are realistic candidates
for thermally generated self-interacting dark matter in the Universe, a type of
dark matter that has been recently proposed in order to overcome some
difficulties of collisionless cold dark matter models at the galactic scale.
These candidates arise without introducing a new mass scale in the model and/or
without the need for a discrete symmetry to stabilize them, but at the expense
of tuning several combinations of parameters of the scalar potential.


title: Constraints on the new particle in $\Sigma^+\to p\mu^+\mu^-$

abstract:
  The HyperCP collaboration has presented the branching ratio of $\Sigma^+\to
p\mu^+\mu^-$ to be $(8.6^{+6.6}_{-5.4}\pm 5.5)\times 10^{-8}$ and suggested a
new boson $P^0$ with a mass of $214.3\pm 0.5$ MeV to induce the flavor changing
transition of $s\to d\mu^+\mu^-$. We demonstrate that to explain the data, the
new particle cannot be a scalar but pseudoscalar based on the direct
constraints from $K^+\to\pi^+\mu^+\mu^-$ and $K_L\to\mu^+\mu^-$, respectively.
Moreover, we determine that the decay width of the pseudoscalar should be in
the range of $10^{-7}$ MeV with the lifetime of $10^{-14}$ sec.


title:
Dynamical Chiral Symmetry Breaking and Superconductivity in the
  Supersymmetric Nambu$-$Jona-Lasinio Model at finite Temperature and Density

abstract:
  We investigate the dynamical chiral symmetry breaking (DCSB) and
superconductivity in a supersymmetric model at finite temperature and density.
We employ the ${\cal N}=1$ four-dimensional generalized supersymmetric
Nambu$-$Jona-Lasinio model (${\cal N}=1$ generalized ${\rm SNJL}_{4}$) with a
chemical potential as the model Lagrangian, and select the gauge freedom as
U(1). In order to realize the DCSB and BCS-type superconductivity in this
model, we introduce a SUSY soft mass term. Under the finite-temperature
Matsubara formalism, the effective potential and the gap equations are derived
in the flamework of the large-N expansion. The finite-density effect in the
DCSB is shown by the critical coupling. The roles of both the boson and fermion
sectors in the superconductivity are examined by the quasiparticle excitation
spectra and the gap equations.


title: Understanding magnetic instability in gapless superconductors

abstract:
  Magnetic instability in gapless superconductors still remains as a puzzle. In
this article, we point out that the instability might be caused by using BCS
theory in mean-field approximation, where the phase fluctuation has been
neglected. The mean-field BCS theory describes very well the strongly coherent
or rigid superconducting state. With the increase of mismatch between the Fermi
surfaces of pairing fermions, the phase fluctuation plays more and more
important role, and "soften" the superconductor. The strong phase fluctuation
will eventually quantum disorder the superconducting state, and turn the system
into a phase-decoherent pseudogap state.


title:
Constrained non-Markovian Monte Carlo modelling of the evolution
  equation in QCD

abstract:
  A new class of the constrained Monte Carlo (CMC) algorithms for the QCD
evolution equation was recently discovered. The constraint is imposed on the
type and the total longitudinal energy of the parton exiting QCD evolution and
entering a hard process. The efficiency of the new CMCs is found to be
reasonable.


title:
Double Higgs Production and Quadratic Divergence Cancellation in Little
  Higgs Models with T Parity

abstract:
  We analyze double Higgs boson production at the Large Hadron Collider in the
context of Little Higgs models. In double Higgs production, the diagrams
involved are directly related to those that cause the cancellation of the
quadratic divergence of the Higgs self-energy, providing a robust prediction
for this class of models. We find that in extensions of this model with the
inclusion of a so-called T-parity, there is a significant enhancement in the
cross sections as compared to the Standard Model.


title: CP Violation Highlights: Circa 2005

abstract:
  Recent highlights in CP violation phenomena are reviewed. B-factory results
imply that CP-violation phase in the CKM matrix is the dominant contributor to
the observed CP violation in K and B-physics. Deviations from the predictions
of the CKM-paradigm due to beyond the Standard Model CP-odd phase are likely to
be a small perturbation. Therefore, large data sample of clean B's will be
needed. Precise determination of the unitarity triangle, along with time
dependent CP in penguin dominated hadronic and radiative modes are discussed.
Null tests in B, K and top-physics and separate determination of the
K-unitarity triangle are also emphasized.


title:
Differential equations and high-energy expansion of two--loop diagrams
  in D dimensions

abstract:
  New method of calculation of master integrals using differential equations
and asymptotical expansion is presented. This method leads to the results exact
in space-time dimension $D$ having the form of the convergent power series. As
an application of this method, we calculate the two--loop master integral for
"crossed--triangle" topology which was previously known only up to $O(\ep)$
order. The case when a topology contains several master integrals is also
considered. We present an algorithm of the term-by-term calculation of the
asymptotical expansion in this case and analyze in detail the "crossed--box"
topology with three master integrals.


title: Solving Solar Neutrino Puzzle via LMA MSW Conversion

abstract:
  We analyze the existing solar neutrino experiment data and show the allowed
regions. The result from SNO's salt phase itself restricts quite a lot the
allowed region's area. Reactor neutrinos play an important role in determining
oscillation parameters. KamLAND gives decisive conclusion on the solution to
the solar neutrino puzzle, in particular, the spectral distortion in the 766.3
Ty KamLAND data gives another new improvement in the constraint of solar
MSW-LMA solutions. We confirm that at 99.73% C.L. the high-LMA solution is
excluded.


title: Higher Twist Effects in Polarized DIS

abstract:
  The size of higher twist corrections to the spin proton and neutron g1
structure functions and their role in determining the polarized parton
densities in the nucleon is discussed.


title:
Can the nondiagonal charged-lepton mass matrix improve the tripartite
  neutrino mixing?

abstract:
  It is shown that the off-diagonal corrections in a realistic charged-lepton
mass matrix, introduced previously by the author, cannot improve much the
tripartite neutrino mixing. In fact, $s^2_{12} = 1/3 - 0.005 = 0.328 \simeq 1/3
$ for $s^2_{12}$ improved in this way, while $s^2_{12 {\rm exp}} = 0.314 = 1/3
- 0.019$ for the central value of experimental $s^2_{12 {\rm exp}}$.


title:
Retardation Effect for Collisional Energy Loss of Hard Partons Produced
  in a QGP

abstract:
  We study the collisional energy loss suffered by an energetic parton
travelling the distance L in a high temperature quark-gluon plasma and
initially produced in the medium. We find that the medium-induced collisional
loss -Delta E(L) is strongly suppressed compared to previous estimates which
assumed the collisional energy loss rate -dE/dx to be constant. The large L
linear asymptotic behaviour of -Delta E(L) sets in only after a quite large
retardation time. The suppression of -Delta E(L) is partly due to the fact that
gluon bremsstrahlung arising from the initial acceleration of the energetic
parton is reduced in the medium compared to vacuum. The latter radiation
spectrum is sensitive to the plasmon modes of the quark-gluon plasma and has a
rich angular structure.


title: Manifestly Lorentz-Invariant Baryon Chiral Perturbation Theory

abstract:
  A successful effective field theory program requires besides the most general
effective Lagrangian a perturbative expansion scheme for observables in terms
of a consistent power counting method. We discuss a renormalization scheme for
manifestly Lorentz-invariant baryon chiral perturbation theory generating a
simple and consistent power counting for renormalized diagrams. The approach
may be used in an iterative procedure to renormalize higher-order loop diagrams
and also allows for implementing a consistent power counting when vector mesons
are explicitly included.


title:
Calculation of the real part of the nuclear amplitude at high s and
  small t from the Coulomb amplitude

abstract:
  A new method for the determination of the real part of the elastic scattering
amplitude is examined for high energy proton-proton at small momentum transfer.
This method allows us to decrease the number of model assumptions, to obtain
the real part in a narrow region of momentum transfer and to test different
models. The possible non-exponential behavior of the real part was found on the
base of the analysis of the ISR experimental data.


title: The strong coupling constant at low Q^2

abstract:
  We extract an effective strong coupling constant using low-Q^2 data and sum
rules. Its behavior is established over the full Q^2-range and is compared to
calculations based on lattice QCD, Schwinger-Dyson equations and a quark model.
Although the connection between all these quantities is not known yet, the
results are surprisingly alike. Such a similitude may be related to
quark-hadron duality.


title:
Higgs production and decay: Analytic results at next-to-leading order
  QCD

abstract:
  The virtual two-loop corrections for Higgs production in gluon fusion are
calculated analytically in QCD for arbitrary Higgs and quark masses. Both
scalar and pseudo-scalar Higgs bosons are considered. The results are obtained
by expanding the known one-dimensional integral representation in terms of
m_H/m_q, and matching it with a suitably chosen ansatz of Harmonic
Polylogarithms. This ansatz is motivated by the known analytic result for the
Higgs decay rate into two photons. The method also allows us to check this
result and to extend it to the pseudo-scalar decay rate.


title: SO(10)-GUT Coherent Baryogenesis

abstract:
  A model for GUT baryogenesis, coherent baryogenesis within the framework of
supersymmetric SO(10), is considered. In particular, we discuss the Barr-Raby
model, where at the end of hybrid infl ation charge asymmetries can be created
through the time-dependent higgsino-gaugino mixing mass matrix. These
asymmetries are processed to Standard Model matter through decays via
nonrenormalizable (B-L)-violating operators. We find that a baryon asymmetry in
accordance with observation can be generated. An appendix is devoted to provide
useful formulas and concrete examples for calculations within SO(10).


title: Decay of Excited String States at Colliders and Cosmic Ray Detectors

abstract:
  It is argued that in the context of TeV gravity with large extra dimensions,
excited string states produced in colliders and in the interaction of cosmic
rays with the atmosphere may decay preferentially into invisible bulk modes,
rather than visible gauge fields on the brane. This contrast to the black hole
case comes about because of the absence of a relationship between physical size
and temperature for string ball states. We estimate the effect of this upon the
number of events predicted at cosmic ray observatories and colliders.


title: X(3872) diagnostics with decays to D {\bar D} \gamma

abstract:
  It is pointed out that in the decays $X(3872) \to D {\bar D} \gamma$ the
possible `molecular' component of the X(3872) should give rise essentially only
to a $D^0 {\bar D}^0 \gamma$ final state with a predictable spectrum, and
should yield virtually no contribution to decays into $D^+D^- \gamma$. The
latter final state with charged $D$ mesons should however arise from the
radiative decays of the short-distance core of the X(3872) through the
transition $X(3872) \to \psi(3770) \gamma$. Thus an observation of the
radiative decays of X(3872) to pairs of neutral and charged $D$ mesons would
provide an insight into the internal dynamics of the X(3872) resonance.


title: pi^+ - pi^0 mass difference and S parameter in the large N_f QCD

abstract:
  In the framework of the Schwinger-Dyson equation and the Bethe-Salpeter
equation in the improved ladder approximation, we calculate the S parameter and
an analogue of the \pi^+ - \pi^0 mass difference \Delta m_\pi^2 \equiv
m_{\pi^+}^2 -m_{\pi^0}^2 as well as the NG boson decay constant f_\pi on the
same footing in the large N_f QCD, through the difference between the vector
current correlator \Pi_{VV} and the axial-vector current correlator \Pi_{AA}.
Approaching the chiral phase transition point \alpha_*\to \alpha_{\rm cr}
(=\pi/4) from the broken phase, where \alpha_* is the the gauge coupling on the
infrared fixed point, \Delta m_\pi^2 as well as f_\pi^2 goes to zero with the
essential-singularity scaling (Miransky scaling), while the ratio indicates a
blowing up enhancement reflecting the characteristic behavior of the large N_f
QCD as a walking theory which is expected to scale as \Delta m_\pi^2/f_\pi^2
\sim (\alpha_*/\alpha_{\rm cr}-1)^{-1/2}. On the other hand, the S parameter
takes values somewhat smaller than that of the real-life QCD and indicates
slightly decreasing tendency as we approach the phase transition point.


title:
Improving bounds on flavor changing vertices in the two Higgs doublet
  model from $B-\bar{B}$ mixing

abstract:
  We find some constraints on the flavor changing vertices of the two Higgs
doublet model, from the \Delta M_{B_{d}} measurement. Although bounds from this
observable have already been considered, this paper takes into account the role
of a new operator not included previously, as well as the vertices \xi_{bb},
\xi_{tc} and \xi_{sb}. Using the Cheng-Sher parametrization, we found that for
a relatively light charged Higgs boson (200-300 GeV), we get that \lambda
_{tt}<1, while the parameter \lambda_{bb} could have values up to about 50. In
addition, we use bounds for \lambda_{tt} and \lambda_{bb} obtained from
B^{0}->X_{s}\gamma at next to leading order, and studied the case where the
only vanishing vertex factors are the ones involving quarks from the first
family. We obtained that \Delta M_{B_{d}} is not sensitive to the change of the
parameter \lambda_{sb}, while \lambda_{tc}<1


title: Charm Quark Mass from Inclusive Semileptonic B Decays

abstract:
  The MSbar charm quark mass is determined to be m_c(m_c)=1224+-17+-54 MeV from
a global fit to inclusive B meson decay data, where the first error is
experimental, and includes the uncertainty in alpha_s, and the second is an
estimate of theoretical uncertainties in the computation. We discuss the
implications of the pole mass renormalon in the determination of m_c.


title:
Supersymmetric Heavy Higgses at e^+e^- Linear Collider and Dark-Matter
  Physics

abstract:
  We consider the capability of the e^+e^- linear collider (which is recently
called as the International Linear Collider, or ILC) for studying the
properties of the heavy Higgs bosons in the supersymmetric standard model. We
pay special attention to the large \tan\beta region which is motivated, in
particular, by explaining the dark-matter density of the universe (i.e.,
so-called ``rapid-annihilation funnels''). We perform a systematic analysis to
estimate expected uncertainties in the masses and widths of the heavy Higgs
bosons assuming an energy and integrated luminosity of \sqrt{s}=1 TeV and L=1
ab^{-1}. We also discuss its implication to the reconstruction of the
dark-matter density of the universe.


title: Probing the deviation from maximal mixing of atmospheric neutrinos

abstract:
  Pioneering atmospheric muon neutrino experiments have demonstrated the
near-maximal magnitude of the flavor mixing angle $\theta_{23}$. But the
precise value of the deviation $D \equiv 1/2 - \sin^2 \theta_{23}$ from
maximality (if nonzero) needs to be known, being of great interest --
especially to builders of neutrino mass and mixing models. We quantitatively
investigate in a three generation framework the feasibility of determining $D$
in a statistically significant manner from studies of the atmospheric
$\nu_\mu,\bar\nu_\mu$ survival probability including both vacuum oscillations
and matter effects. We show how this determination will be sharpened by
considering the up-down ratios of observed $\nu_\mu$- and $\bar\nu_\mu$-induced
events and the differences of these ratios in specified energy and zenith angle
bins. We consider 1 Megaton year of exposure to a magnetized iron calorimeter
such as the proposed INO detector ICAL, taking into account both energy and
zenith angle resolution functions. The sensitivity of such an exposure and the
dependence of the determination of $D$ on the concerned oscillation parameters
are discussed in detail. The vital use of matter effects in fixing the octant
of $\theta_{23}$ is highlighted.


title: Axions 05

abstract:
  The Strong CP Problem and its resolution through the existence of an axion
are briefly reviewed. The combined constraints from accelerator searches, the
evolution of red giants and the duration of the SN 1987a neutrino pulse require
the axion mass $m_a$ to be less than $3 \cdot 10^{-3}$ eV. On the other hand,
the requirement that the axion does not overclose the universe implies a lower
bound on $m_a$ of order $10^{-6}$ eV. This lower bound can, however, be relaxed
in a number of ways. If $m_a$ is near the lower bound, axions are an important
contribution to the energy density of the universe in the form of (very) cold
dark matter. Dark matter axions can be searched for on Earth by stimulating
their conversion to microwave photons in an electromagnetic cavity permeated by
a magnetic field. Using this technique, limits on the local halo density have
been placed by the Axion Dark Matter eXperiment. I'll give a status report on
ADMX and its upgrade presently under construction. I'll also report on recent
results from solar axion searches and laser experiments.


title: Measuring Dark Matter at Colliders

abstract:
  We investigate the need and prospects for measuring dark matter properties at
particle collider experiments. We discuss the connections between the inferred
properties of particle dark matter and the physics that is expected to be
uncovered by the Large Hadron Collider (LHC) and the International Linear
Collider (ILC) and motivate the necessity of measuring detailed dark matter
properties at a collider. We then investigate a model-independent signature of
dark matter at a collider and discuss its observability. We next examine the
prospects for making precise measurements of dark matter properties using two
example points in minimal supergravity (mSUGRA) parameter space. One of the
primary difficulties encountered in such measurements is lack of constraint on
the masses of unobservable heavy states. We discuss a new method for
experimentally deriving estimates for such heavy masses and then conclude.


title: 3-3-1 Models with Unique Lepton Generations

abstract:
  We study previously unconsidered 3-3-1 models which are characterized by each
lepton generation having a different representation under the gauge group.
Flavor-changing neutral currents in the lepton sector occur in these models. To
satisfy constraints on mu to 3e decays, the Z' must be heavier than 2 to 40
TeV, depending on the model and assignments of the leptons. These models can
result in very unusual Higgs decay modes. In most cases the mu-tau decay state
is large (in one case, it is the dominant mode), and in one case, the Higgs to
s-sbar rate dominates.


title: New Matter Effects and BBN Constraints for Mass Varying Neutrinos

abstract:
  The presence of light (m_a ~ 10^-6 ev) scalar fields in the early universe
can modify the cosmology of neutrinos considerably by allowing their masses to
vary on cosmological times. In this paper, we consider the effect of
Planck-suppressed couplings of this scalar to electrons and show that such
couplings can easily make new sterile states thermally inaccessible in the
early universe, preserving the successes of big bang nucleosynthesis
predictions. We consider the circumstances under which these effects give the
proper initial conditions for recently considered models of neutrino dark
energy, and consider limits from tests of the equivalence principle. The
parameters which satisfy cosmological constraints naturally give rise to
interesting signals in terrestrial neutrino oscillation experiments.


title: Diffractive dijet production at HERA

abstract:
  We present recent experimental data from the H1 and ZEUS Collaborations at
HERA for diffractive dijet production in deep-inelastic scattering (DIS) and
photoproduction and compare them with next-to-leading order (NLO) QCD
predictions using diffractive parton densities. While good agreement is found
for DIS, the dijet photoproduction data are overestimated by the NLO theory,
showing that factorization breaking occurs at this order. While this is
expected theoretically for resolved photoproduction, the fact that the data are
better described by a global suppression of direct and resolved contribution by
about a factor of two comes as a surprise. We therefore discuss in some detail
the factorization scheme and scale dependence between direct and resolved
contributions and propose a new factorization scheme for diffractive dijet
photoproduction.


title: NRQCD: Fundamentals and Applications to Quarkonium Decay and Production

abstract:
  I discuss NRQCD and, in particular, the NRQCD factorization formalism for
quarkonium production and decay. I also summarize the current status of the
comparison between the predictions of NRQCD factorization and experimental
measurements.


title:
Complex conformal spin partial wave expansion of generalized parton
  distributions and distribution amplitudes

abstract:
  We introduce a new representation of generalized parton distributions and
generalized distribution amplitudes that is based on the partial wave
decomposition with respect to the complex collinear conformal spin. This
decomposition leads us to a versatile parameterization of these
non-perturbative functions in terms of conformal moments, which are measurable
for integer value on the lattice. This new representation has several
advantages: basic properties and crossing relations are automatically
implemented, a rather flexible parameterization is possible, the numerical
treatment of evolution is simple and analytic approximation of scattering
amplitudes can be given. We demonstrate this for simple examples. In
particular, phenomenological considerations indicate that the t-dependence of
Mellin moments is governed by Regge trajectories. The new representation is
vital to push the analysis of deeply virtual Compton scattering to
next-to-next-to-leading order.


title: Electroweak interactions and the muon g-2: bosonic two-loop effects

abstract:
  We present a detailed evaluation of the bosonic two-loop electroweak
corrections to the muon's anomalous magnetic moment. We study the Higgs mass
dependence and find agreement with a previous evaluation in the large Higgs
mass limit. We find $a_{\mu}^{\rm EW bos}({two-loop})=(-22.2 \pm 1.6)\times
10^{-11}$, for $114 {\rm GeV} \le M_{\rm Higgs}\le 700 {\rm GeV}$.


title: QCD Plasma Instabilities: The Nonabelian Cascade

abstract:
  Magnetic plasma instabilities appear to play an important role in the early
stages of quark-gluon plasma equilibration in the high energy (weak coupling)
limit. Numerical studies of the growth of such instabilities from small seed
fluctuations have found initial exponential growth in their energy, followed by
linear growth once the associated color magnetic fields become so large that
their non-abelian interaction are non-perturbative. In this paper, we use
simulations to determine the nature of this linear energy growth. We find that
the long-wavelength modes associated with the instability have ceased to grow,
but that they cascade energy towards the ultraviolet in the form of plasmon
excitations of ever increasing energy. We find a quasi-steady-state power-law
distribution $f_k \propto k^{-\nu}$ for this cascade, with spectral index $\nu
\simeq 2$.


title:
Constraints induced by finite plasma formation time on some physical
  observables at RHIC

abstract:
  We discuss consequences of finite plasma formation time at RHIC. Nuclear
modification factor, azimuthal assymetry, di-jet correlations can
quantitatively be described by particle production in the early stage of the
nuclear collision. A possible impact on interpretation of the non-photonic
electrons and J/psi data is also considered.


title: Representations of the LL BFKL Kernel and the Bootstrap

abstract:
  Different forms of the BFKL kernel both in coordinate and momentum
representations may appear as a result of different gauge choices and/or inner
scalar products of the color singlet states. We study a spectral representation
of the BFKL kernel not defined on the Moebius space of functions but on a
deformation of it, which provides the usual bootstrap property due to gluon
reggeization. In this space the corresponding symmetry is made explicit
introducing a deformed realization of the sl(2,C) algebra.


title:
A Minimal Spontaneously Broken Hidden Sector and its Impact on Higgs
  Boson Physics at the Large Hadron Collider

abstract:
  Little experimental data bears on the question of whether there is a
spontaneously broken hidden sector that has no Standard Model quantum numbers.
Here we discuss the prospects of finding evidence for such a hidden sector
through renormalizable interactions of the Standard Model Higgs boson with a
Higgs boson of the hidden sector. We find that the lightest Higgs boson in this
scenario has smaller rates in standard detection channels, and it can have a
sizeable invisible final state branching fraction. Details of the hidden sector
determine whether the overall width of the lightest state is smaller or larger
than the Standard Model width. We compute observable rates, total widths and
invisible decay branching fractions within the general framework. We also
introduce the ``A-Higgs Model'', which corresponds to the limit of a hidden
sector Higgs boson weakly mixing with the Standard Model Higgs boson. This
model has only one free parameter in addition to the mass of the light Higgs
state and it illustrates most of the generic phenomenology issues, thereby
enabling it to be a good benchmark theory for collider searches. We end by
presenting an analogous supersymmetry model with similar phenomenology, which
involves hidden sector Higgs bosons interacting with MSSM Higgs bosons through
D-terms.


title:
Mixed QCD and Weak Corrections to $t\bar{t}$ Production by
  Quark-Antiquark Annihilation

abstract:
  We report on our computation of the mixed QCD and weak corrections to $q
{\bar q} \to t\bar{t}$ including $t, \bar t$ spin effects, in particular on
single top spin asymmetries.


title: Production and decay of the meson $B_c$

abstract:
  Studies on the decay and production of $B_c (B^*_c)$ meson are briefly
reviewed. Considering RUN-II of Tevatron and the schedule of LHC, the
theoretical studies of $B_c$ meson will jump to a new stage not only for itself
but also to implement the studies of the heavy quarkonia etc.


title: Four Quark cn - nbar cbar States in U(12)-Scheme and X(3872)/Y(3940)

abstract:
  The properties of four quark cn - nbar cbar states are investigated as cn
di-quark and nbar cbar di-antiquark system in U(12)-classification scheme of
hadrons, recently proposed by us. We consider the negative-parity di-quark and
di-antiquark in ground states, which form with the ordinary positive-parity
ones the respective linear representations of chiral symmetry. The masses and
widths of ground-states are predicted by using Joint Spring Quark Model, and
the observed properties of X(3872) and Y(3940) are consistent, respectively,
with those of the JPC=1++ and 2++ states from the negative-parity di-quark and
di-antiquark. Their narrow-widths are explained from an orthogonality of spinor
wave functions. The properties of ground-state cs - sbar cbar system are also
predicted in this scheme.


title: Probing Unquenching Effects in the Gluon Polarisation in Light Mesons

abstract:
  We introduce an extension to the ladder truncated Bethe-Salpeter equation for
mesons and the rainbow truncated quark Dyson-Schwinger equations which includes
quark-loop corrections to the gluon propagator. This truncation scheme obeys
the axialvector Ward-Takahashi identity relating the quark self-energy and the
Bethe-Salpeter kernel. Two different approximations to the Yang-Mills sector
are used as input: the first is a sophisticated truncation of the full
Yang-Mills Dyson-Schwinger equations, the second is a phenomenologically
motivated form. We find that the spectra and decay constants of pseudoscalar
and vector mesons are overall described well for either approach. Meson mass
results for charge eigenstate vector and pseudoscalar meson masses are compared
to lattice data. The effects of unquenching the system are small but not
negligible.


title:
Permutation Symmetry S_3 and VEV Structure of Flavor-Triplet Higgs
  Scalars

abstract:
  A model with flavor-triplet Higgs scalars \phi_i (i=1,2,3)is investigated
under a permutation symmetry S_3 and its symmetry breaking. A possible S_3
breaking form of the Higgs potential whose vacuum expectation values v_i=<
\phi_i> satisfy a relation v_1^2 +v_2^2 +v_3^2 ={2/3}(v_1 +v_2 +v_3)^2 is
investigated, because if we suppose a seesaw-like mass matrix model M_e = m
M^{-1} m with m_{ij} \propto \delta_{ij} v_i and M_{ij} \propto \delta_{ij},
such a model can lead to the well-known charged lepton mass relation m_e +m_\mu
+m_\tau = {2/3} (\sqrt{m_e}+\sqrt{m_\mu} +\sqrt{m_\tau})^2.


title: Regarding the axial-vector mesons

abstract:
  The implications of the $f_1(1285)-f_1(1420)$ mixing for the
$K_1(^3P_1)-K_1(^1P_1)$ mixing angle is investigated. Based on the
$f_1(1285)-f_1(1420)$ mixing angle $\sim 50^\circ$ suggested from the analysis
for a substantial body of data concerning the $f_1(1420)$ and $f_1(1285)$, the
masses of the $K_1(^3P_1)$ and $K_1(^1P_1)$ are determined to be $\sim
1307.35\pm 0.63$ MeV and $1370.03\pm 9.69$ MeV, respectively, which therefore
suggests that the $K_1(^3P_1)-K_1(^1P_1)$ mixing angle is about $\pm (59.55\pm
2.81)^\circ$. Also, it is found that the mass of the $h^\prime_1(^1P_1)$
(mostly of $s\bar{s}$) state is about $1495.18\pm 8.82$ MeV. Comparison of the
predicted results and the available experimental information of the $h_1(1380)$
shows that without further confirmation on the $h_1(1380)$, the assignment of
the $h_1(1380)$ as the $s\bar{s}$ member of the $^1P_1$ meson nonet may be
premature.


title: Traveling waves in discretized Balitsky-Kovchegov evolution

abstract:
  We study the asymptotic solutions of a version of the Balitsky-Kovchegov
evolution with discrete steps in rapidity. We derive a closed iterative
equation in momentum space. We show that it possesses traveling-wave solutions
and extract their properties. We find no evidence for chaotic behaviour due to
discretization.


title:
Probing the neutrino mass matrix in next generation neutrino oscillation
  experiments

abstract:
  We review the current status of the neutrino mass and mixing parameters
needed to reconstruct the neutrino mass matrix. A comparative study of the
precision in the measurement of oscillation parameters expected from the next
generation solar, atmospheric, reactor and accelerator based experiments is
presented. We discuss the potential of $0\nu\beta\beta$ experiments in
determining the neutrino mass hierarchy and the importance of a better
$\theta_{12}$ measurement for it.


title: Lepton flavour violation in realistic non-minimal supergravity models

abstract:
  Realistic effective supergravity models have a variety of sources of lepton
flavour violation (LFV) which can drastically affect the predictions relative
to the scenarios usually considered in the literature based on minimal
supergravity and the supersymmetric see-saw mechanism. We catalogue the
additional sources of LFV which occur in realistic supergravity models
including the effect of D-terms arising from an Abelian U(1) family symmetry,
non-aligned trilinear contributions from scalar F-terms, as well as non-minimal
supergravity contributions and the effect of different Yukawa textures. In
order to quantify these effects, we investigate a string inspired effective
supergravity model arising from intersecting D-branes supplemented by an
additional U(1) family symmetry. In such theories the magnitude of the D-terms
is predicted, and we calculate the branching ratios for $\mu\to e\gamma$ and
$\tau \to \mu \gamma$ for different benchmark points designed to isolate the
different non-minimal contributions. We find that the D-term contributions are
generally dangerously large, but in certain cases such contributions can lead
to a dramatic suppression of LFV rates, for example by cancelling the effect of
the see-saw induced LFV in $\tau \to \mu \gamma$ models with lop-sided
textures. In the class of string models considered here we find the surprising
result that the D-terms can sometimes serve to restore universality in the
effective non-minimal supergravity theory.


title:
The UTfit Collaboration Report on the Status of the Unitarity Triangle
  beyond the Standard Model I. Model-independent Analysis and Minimal Flavour
  Violation

abstract:
  Starting from a (new physics independent) tree level determination of rhobar
and etabar, we perform the Unitarity Triangle analysis in general extensions of
the Standard Model with arbitrary new physics contributions to loop-mediated
processes. Using a simple parameterization, we determine the allowed ranges of
non-standard contributions to |Delta F|=2 processes. Remarkably, the recent
measurements from B factories allow us to determine with good precision the
shape of the Unitarity Triangle even in the presence of new physics, and to
derive stringent constraints on non-standard contributions to |Delta F|=2
processes. Since the present experimental constraints favour models with
Minimal Flavour Violation, we present the determination of the Universal
Unitarity Triangle that can be defined in this class of extensions of the
Standard Model. Finally, we perform a combined fit of the Unitarity Triangle
and of new physics contributions in Minimal Flavour Violation, reaching a
sensitivity to a new physics scale of about 5 TeV. We also extrapolate all
these analyses into a "year 2010" scenario for experimental and theoretical
inputs in the flavour sector. All the results presented in this paper are also
available at the URL http://www.utfit.org, where they are continuously updated.


title:
Impact of future HERA data on the determination of proton parton
  distribution functions

abstract:
  The high precision and large kinematic coverage of the data from the HERA-I
running period (1994-2000) have already allowed precise extractions of proton
parton distribution functions. The HERA-II running program is now underway and
is expected to provide a substantial increase in the luminosity collected at
HERA. In this paper, a study is presented which investigates the potential
impact of future HERA data on the proton PDF uncertainties, within the
currently planned running scenario. Next-to-leading order QCD predictions for
inclusive jet cross sections at the LHC centre-of-mass energy are presented
using the estimated PDFs. Finally, the effect of a possible future measurement
of the longitudinal structure function, F_L, on the gluon distribution is
investigated.


title: Dark Matter before the LHC in a Natural Supersymmetric Standard Model

abstract:
  We show that the solid lower bound of about 10^{-44} cm^2 is obtained for the
cross section between the supersymmetric dark matter and nucleon in a theory in
which the supersymmetric fine-tuning problem is solved without extending the
Higgs sector at the weak scale. This bound arises because of relatively small
superparticle masses and a fortunate correlation that the two dominant diagrams
for the dark matter detection always interfere constructively if the constraint
from the b -> s \gamma measurements is obeyed. It is, therefore, quite
promising in the present scenario that the supersymmetric dark matter is
discovered before the LHC, assuming that the dark matter is the lightest
supersymmetric particle.


title: Novel Aspects of Hard Diffraction in QCD

abstract:
  Initial- and final-state interactions from gluon-exchange, normally neglected
in the parton model have a profound effect in QCD hard-scattering reactions,
leading to leading-twist single-spin asymmetries, diffractive deep inelastic
scattering, diffractive hard hadronic reactions, and nuclear shadowing and
antishadowing--leading-twist physics not incorporated in the light-front
wavefunctions of the target computed in isolation. I also discuss the use of
diffraction to materialize the Fock states of a hadronic projectile and test
QCD color transparency.


title: Magnetic Monopoles, Chiral Symmetries, and the NuTeV Anomaly

abstract:
  The long-sought "magnetic monopole" appears to be -- not a fermion distinct
from the electrons and quarks -- but a charge carried by the known electrons
and the quarks themselves. Similarly to the "Z" charge of electroweak theory,
however, this magnetic monopole charge only manifests its interactions at
sufficiently-high energy, and its interactions may not respect chiral symmetry.
Calculated cross-section enhancements from magnetic monopole interactions at
s=M_z^2 reduce the observed weak mixing angle for e e-bar --> mu mu-bar decays
by about delta sin^2 theta_W = -.0030 relative to v v-bar --> mu mu-bar decays,
and so may help account for the NuTeV anomaly. Similar, though less-pronounced
reductions are calculated for e e-bar --> q q-bar.


title:
Isospin Breaking in the Relation Between the tau-->nu_tau pi pi and
  e^+e^- -->pi^+ pi^- Versions of |F_\pi (s)|^2$ and Implications for (g-2)_mu

abstract:
  We investigate two points related to existing treatments of isospin-breaking
corrections to the CVC relation between the e^+e^- --> pi^+ pi^- cross-section
and dGamma[tau^- --> nu_tau pi^- pi^0]/ds. Implications for the value of the
hadronic contribution to a_mu =(g-2)_mu /2 based on those analyses
incorporating hadronic tau decay data are also considered. We conclude that the
uncertainty on the isospin-breaking correction which must be applied to the tau
decay data should be significantly increased, and that the central value of the
rho-omega ``mixing'' contribution to this correction may be significantly
smaller than indicated by the present standard determination. Such a shift
would contribute to reducing the discrepancy between the tau- and
electroproduction-based determinations of the leading order hadronic
contribution to a_mu.


title:
Sparticle spectrum and EWSB of mixed modulus-anomaly mediation in fluxed
  string compactification models

abstract:
  We examine low energy sparticle mass-spectrum and electroweak symmetry
breaking (EWSB) in the mixed modulus-anomaly mediation which is naturally
realized in KKLT flux compactification. We find that the anomaly-mediation
effectively lowers messenger scale in the moduli-mediation and leads to
'squeezed' mass-spectrum distinct from any known mediation mechanisms. The
lightest neutralino typically becomes a mixed state of bino and higgsino or
pure higgsino, which has a considerable impact on the cold dark matter physics.


title: The turbulent spectrum created by non-Abelian plasma instabilities

abstract:
  Recent numerical work on the fate of plasma instabilities in weakly-coupled
non-Abelian gauge theory has shown the development of a cascade of energy from
long to short wavelengths. This cascade has a steady-state spectrum, analogous
to the Kolmogorov spectrum for turbulence in hydrodynamics or for energy
cascades in other systems. In this paper, we theoretically analyze processes
responsible for this cascade and find a steady-state spectrum f_k ~ k^-2, where
f_k is the phase-space density of particles with momentum k. The exponent -2 is
consistent with results from numerical simulations. We also discuss
implications of the emerging picture of instability development on the
"bottom-up" thermalization scenario for (extremely high energy) heavy ion
collisions, emphasizing fundamental questions that remain to be answered.


title: Renormalization of the EWCL and its Application to LEP2

abstract:
  We perform a systematic one-loop renormalization on the electroweak chiral
Lagrangian (EWCL) up to $O(p^4)$ operators and construct the renormalization
group equations (RGE) for the anomalous couplings. We examine the impact of the
triple gauge coupling (TGC) measurement from LEP2 to the uncertainty of the
$S-T$ parameter at the $\Lambda=1 TeV$, and find that the uncertainty in the
TGC measurements can shift $S(\Lambda)$ at least $3.3 \sigma$.


title:
Large evolution of the bilinear Higgs coupling parameter in SUSY models
  and reduction of phase sensitivity

abstract:
  The phases in a generic low-energy supersymmetric model are severely
constrained by the experimental upper bounds on the electric dipole moments of
the electron and the neutron. Coupled with the requirement of radiative
electroweak symmetry breaking, this results in a large degree of fine tuning of
the phase parameters at the unification scale. In supergravity type models,
this corresponds to very highly tuned values for the phases of the bilinear
Higgs coupling parameter $B$ and the universal trilinear coupling $A_0$. We
identify a cancellation/enhancement mechanism associated with the
renormalization group evolution of $B$, which, in turn, reduces such
fine-tuning quite appreciably without taking recourse to very large masses for
the supersymmetric partners. We find a significant amount of reduction of this
fine-tuning in nonuniversal gaugino mass models that do not introduce any new
phases.


title: More on Conformally Sequestered SUSY Breaking

abstract:
  We extend our models for conformal sequestering of dynamical supersymmetry
breaking with decoupling vector-like matter in several different ways. These
extensions enable us to simplify concrete model building, in particular,
rendering large gauge group and ad hoc global symmetry for sequestering
unnecessary. Conformal sequestering appears highly natural in such
circumstances.


title: Fermion Condensate Model of Electroweak Interactions

abstract:
  A new dynamical symmetry breaking model of electroweak interactions is
proposed based on interacting fermions. Two fermions of different SU_{L}(2)
representations form a symmetry breaking condensate and generate the lepton and
quark masses. The weak gauge bosons get their usual standard model masses from
a gauge invariant Lagrangian of a doublet scalar field composed of the new
fermion fields. The new fermion fields become massive by condensation. It is
shown that the new charged fermions are produced at the next linear colliders
in large number. The model is a low energy one which cannot be renormalized
perturbatively. For the parameters of the model unitarity constraints are
presented.


title: Light wino dark matter in brane world cosmology

abstract:
  The thermal relic density of the wino-like neutralino dark matter in the
brane world cosmology is studied. The expansion law at a high energy regime in
the brane world cosmology is modified from the one in the standard cosmology,
and the resultant relic density can be enhanced if the five dimensional Planck
mass $M_5$ is low enough. We calculate the wino-like neutralino relic density
in the anomaly mediated supersymmetry breaking scenario and show that the
allowed region is dramatically modified from the one in the standard cosmology
and the wino-like neutralino with mass of order 100 GeV can be a good candidate
for the dark matter. Since the allowed region disappears eventually as $M_5$ is
decreasing, we can find a lower bound on $M_5 \gtrsim 100$ TeV according to the
neutralino dark matter hypothesis, namely the lower bound in order for the
allowed region of the neutralino dark matter to exist.


title:
Selfconsistent calculations of sigma-meson properties at finite
  temperature

abstract:
  I study the properties of the scalar sigma-meson [also referred to as
f_0(600)] at nonzero temperature in the O(N)-model in the framework of the
Cornwall-Jackiw-Tomboulis formalism. In the standard Hartree (or large-N)
approximation one only takes into account the double-bubble diagrams in the
effective potential. I improve this approximation by additionally taking into
account the sunset diagrams, which lead to 4-momentum dependent real and
imaginary parts of the Dyson-Schwinger equations. By solving these and the
equation for the chiral condensate selfconsistently, one obtains the decay
width and the spectral density of the sigma-meson. I compare the results in the
case with explicit chiral symmetry breaking with the chiral limit. I found that
the 4-momentum dependent real part of the selfenergy does not lead to major
qualitative changes in the spectral density.


title: The $B \to K\pi$ Puzzle and Supersymmetric Models

abstract:
  In the light of new experimental results on $B \to K\pi$ decays, we study the
decay processes $B \to K \pi$ in the framework of both R-parity conserving
(SUGRA) and R-parity violating supersymmetric models. We find that any possible
deviations from the Standard Model indicated by the current data for the
branching ratios and the direct CP asymmetries of $B \to K\pi$ can be explained
in both R-parity conserving SUGRA and R-parity violating SUSY models. However,
there is a difference between the predictions of both models to the
time-dependent CP asymmetry observable $S_{K_{_S} \pi^0}$ whose current
experimental results include large uncertainties. We demonstrate that this
difference can be useful for testing both models with more accurate data for
$S_{K_{S} \pi^0}$ and $A_{CP}^{+-}$ in the near future.


title: Electroweak corrections to W\gamma and Z\gamma production at the LHC

abstract:
  We have calculated the electroweak O(\alpha) corrections to the processes p p
-> Z \gamma + X -> \nu_l \bar{\nu}_l \gamma + X, p p -> Z \gamma + X -> l
\bar{l} \gamma + X, and p p -> W \gamma + X -> \nu_l \bar{l} \gamma + X at the
LHC, with l=e,\mu and \nu_l=\nu_e,\nu_\mu,\nu_\tau. The virtual corrections are
evaluated in leading-pole approximation, whereas the real corrections are taken
into account exactly. These corrections are implemented into a Monte Carlo
generator which includes both phase-space slicing and subtraction to deal with
soft and collinear singularities. We present numerical results for total cross
sections as well as for experimentally interesting distributions. Applying
typical LHC cuts, the electroweak corrections are of the order of -5% for the
total cross sections and exceed -20% for observables dominated by high
centre-of-mass energies of the partonic processes.


title: T Violation in Baryonic B Decays

abstract:
  We study $T$ violation in the three-body charmless baryonic decay of $\bar
B^0 \ra \Lambda \bar p \pi^+$ through the $T$-odd triple product correlation in
the standard model. We find that the $T$ violating asymmetry is 10%, which is
accessible to the current B factories at KEK and SLAC, while the CP violating
one 1.1%. We emphasize that this triple product correlation would be the first
measurable direct $T$ violating effect predicted in the standard model.


title: Proton polarizability effect in the Lamb shift of the hydrogen atom

abstract:
  The proton polarizability correction to the Lamb shift of electronic and
muonic hydrogen is calculated on the basis of isobar model and experimental
data on the structure functions of deep inelastic lepton-nucleon scattering.
The contributions of the Born terms, vector-meson exchanges and nucleon
resonances are taken into account in the construction of the photoabsorption
cross sections for transversely and longitudinally polarized virtual photons
sigma_{T,L}.


title: Supersymmetric SO(10) And A Prediction For $\theta_{13}$

abstract:
  We present a predictive scheme for fermion masses and mixings based on
supersymmetric SO(10) which provides an understanding of the observed
hierarchies in the charged fermion sector including CKM mixings. In the
neutrino sector bi-large mixing can be realized, while the third leptonic
mixing angle $\theta_{13}\simeq 0.01 - 0.2$.


title: Chiral quark model spin filtering mechanism and hyperon polarization

abstract:
  The model combined with unitarity and impact parameter picture provides
simple mechanism for generation of hyperon polarization in collision of
unpolarized hadrons. We concentrate on a particular problem of
$\Lambda$-hyperon polarization and derive its linear $x_F$-dependence as well
as its energy and transverse momentum independence at large $p_\perp$ values.
Mechanism responsible for the single--spin asymmetries in pion production is
also discussed.


title: A model realizing the Harrison-Perkins-Scott lepton mixing matrix

abstract:
  We present a supersymmetric model in which the lepton mixing matrix $U$
obeys, at the seesaw scale, the Harrison--Perkins--Scott
\textit{Ansatz}--vanishing $U_{e3}$, maximal atmospheric neutrino mixing, and
$\sin^2{\theta_\odot} = 1/3$ ($\theta_\odot$ is the solar mixing angle). The
model features a permutation symmetry $S_3$ among the three lepton multiplets
of each type--left-handed doublets, right-handed charged leptons, and
right-handed neutrinos--and among three Higgs doublets and three
zero-hypercharge scalar singlets; a fourth right-handed neutrino, a fourth
Higgs doublet, and a fourth scalar singlet are invariant under $S_3$. In
addition, the model has seven $\mathbbm{Z}_2$ symmetries, out of which six do
not commute with $S_3$. Supersymmetry is needed in order to eliminate some
quartic terms from the scalar potential, quartic terms which would make
impossible to obtain the required vacuum expectation values of the three Higgs
doublets and three scalar singlets. The Yukawa couplings to the charged leptons
are flavour diagonal, so that flavour-changing neutral Yukawa interactions only
arise at loop level.


title: The total cross section at the LHC

abstract:
  The hard pomeron first came to light in deep inelastic lepton scattering, but
evidence that it contributes also to soft hadronic collisions is reinforced by
the fact that it seems to obey a factorisation similar to that of other Regge
exchanges. Including a hard-pomeron term in a fit to data for sigma(pp) and
sigma(p\bar p) leads to a large total cross section at the LHC. An exact
prediction is not possible because of the uncertaintities arising from
screening corrections; the best estimate is 125 \pm 25 mb.


title:
Moments of nuclear and nucleon structure functions at low Q^2 and the
  momentum sum rule

abstract:
  New nuclear structure function data from Jefferson Lab covering the higher x
and lower Q^2 regime make it possible to extract the higher order F_2 moments
for iron and deuterium at low four-momentum transfer squared Q^2. These moments
allow for an experimental investigation of the nuclear momentum sum rule and a
direct comparison of the non-singlet nucleon moment with Lattice QCD results.


title: Mirror World at the Large Hadron Collider

abstract:
  A mirror world can modify in a striking way the LHC signals of the Higgs
sector. An exact or approximate Z_2 symmetry between the mirror world and our
world allows large mixing between the Higgs bosons of these worlds, leading to
production rates and branching ratios for these states that are markedly
different from the standard model and are characteristic of a mirror world. The
constraints on these Higgs boson masses from precision electroweak data differ
from the standard model bound, so that the new physics that cancels the
quadratic divergence induced by the top quark may appear at a larger scale,
possibly beyond the reach of the LHC. However, the scale of new physics needed
to cancel the quadratic divergence induced by the Higgs boson is not
significantly changed. With small breakings of the Z_2 parity, the lightest
mirror quarks (and possibly charged mirror leptons) could be the dark matter in
the universe, forming galactic halos that are stable to cooling. A possible
signal from the relic radiation density of the mirror world is also discussed.


title:
Minimally Fine-Tuned Supersymmetric Standard Models with
  Intermediate-Scale Supersymmetry Breaking

abstract:
  We construct realistic supersymmetric theories in which the correct scale for
electroweak symmetry breaking is obtained without significant fine-tuning. We
consider two classes of models. In one class supersymmetry breaking is
transmitted to the supersymmetric standard model sector through Dirac gaugino
mass terms generated by a D-term vacuum expectation value of a U(1) gauge
field. In the other class the supersymmetry breaking sector is separated from
the supersymmetric standard model sector in an extra dimension, and the
transmission of supersymmetry breaking occurs through gauge mediation. In both
these theories the Higgs sector contains two Higgs doublets and a singlet, but
unlike the case for the next-to-minimal supersymmetric standard model the
singlet field is not responsible for generating the supersymmetric or
supersymmetry breaking mass for the Higgs doublets. These masses, as well as
the mass for the singlet, are generated through gravitational-strength
interactions. The scale at which the squark and slepton masses are generated is
of order (1-100) TeV, and the generated masses do not respect the unified mass
relations. We find that electroweak symmetry breaking in these theories is
caused by an interplay between the top-stop radiative correction and the
holomorphic supersymmetry breaking mass for the Higgs doublets and that the
fine-tuning can be reduced to the level of 20%. The theories have rich
phenomenology, including a variety of possibilities for the lightest
supersymmetric particle.


title: (mu B)-driven Electroweak Symmetry Breaking

abstract:
  We consider a scenario in which the dominant quartic coupling for the Higgs
doublets arises from the F-term potential, rather than the conventional SU(2)_L
x U(1)_Y D-term potential, in supersymmetric theories. The quartic coupling
arises from a superpotential interaction between the two Higgs doublets and a
singlet field, but unlike the case in the next-to-minimal supersymmetric
standard model the singlet field is not responsible for the generation of the
supersymmetric or holomorphic supersymmetry-breaking masses for the Higgs
doublets. We find that this naturally leads to a deviation from the
conventional picture of top-Yukawa driven electroweak symmetry breaking --
electroweak symmetry breaking is triggered by the holomorphic supersymmetry
breaking mass for the Higgs doublets (the \mu B term). This allows a
significant improvement for fine-tuning in electroweak symmetry breaking, since
the top squarks do not play a major role in raising the Higgs boson mass or in
triggering electroweak symmetry breaking and thus can be light. The amount of
fine-tuning is given by the squared ratio of the lightest Higgs boson mass to
the charged Higgs boson mass, which can be made better than 20%. Solid
implications of the scenario include a small value for tan\beta, less than
about 3, and relatively light top squarks.


title: Hard production of exotic hybrid mesons

abstract:
  Exotic hybrid mesons H, with quantum numbers J^{PC}= 1^{- +} may be copiously
produced in the hard exclusive processes gamma^*(Q^2) gamma -> H and
gamma^*(Q^2) P(p) -> H P(p') because they have a leading twist distribution
amplitude with a sizable coupling constant f_H, which may be estimated through
QCD sum rules. The reaction rates scale in the same way as the corresponding
rates for usual mesons.


title:
Discrimination of Supersymmetry and Universal Extra Dimensions at Hadron
  Colliders

abstract:
  We contrast the experimental signatures of low energy supersymmetry and the
model of Universal Extra Dimensions and discuss various methods for their
discrimination at hadron colliders. We study the discovery reach of the
Tevatron and the LHC for level 2 Kaluza-Klein modes, which would indicate the
presence of extra dimensions. We find that with 100 ${\rm fb}^{-1}$ of data the
LHC will be able to discover the $\gamma_2$ and $Z_2$ KK modes as separate
resonances if their masses are below 2 TeV. We also investigate the possibility
to differentiate the spins of the superpartners and KK modes by means of the
asymmetry method of Barr.


title:
Scalar nonet quarkonia and the scalar glueball: mixing and decays in an
  effective chiral approach

abstract:
  We study the strong and electromagnetic decay properties of scalar mesons
above 1 GeV within a chiral approach. The scalar-isoscalar states are treated
as mixed states of quarkonia and glueball configurations. A fit to the
experimental mass and decay rates listed by the Particle Data group is
performed to extract phenomenological constraints on the nature of the scalar
resonances and to the issue of the glueball decays. A comparison to other
experimental results and to other theoretical approaches in the scalar meson
sector is discussed.


abstract: Erroneous duplicate of hep-ph/0509247 removed by arXiv admin


title:
Resolving the tau versus electroproduction discrepancy for the I=1
  vector spectral function and implications for the SM prediction for a_mu

abstract:
  Using only independent high-scale OPE input, we investigate QCD sum rule
constraints on two currently incompatible versions of the I=1 vector spectral
function, one obtained from electroproduction data, the other from hadronic tau
decay data. Sum rules involving weighted integrals over the spectral functions,
from threshold to a variable upper endpoint, s_0,are employed. It is shown that
both the normalization and slope with respect to s_0 of the EM spectral
integrals disagree with the corresponding OPE expectations, while both the
normalization and slope are in good agreement when hadronic tau decay data is
used instead. These results favor determinations of the leading order hadronic
vacuum polarization contribution to a_mu obtained using the tau decay data, and
hence Standard Model predictions for a_mu compatible with the current
experimental determination.


title:
Charge asymmetries in e\gamma \to eW^+W^-. Hunting for strong
  interaction in Higgs sector

abstract:
  The study of charge asymmetry of W bosons in the process \egam\to eWW can be
a tool for discovery of strong interaction in Higgs sector at energies that are
lower than it is necessary for observation of resonances caused by this strong
interaction.


title:
Extended Gaussian ensemble or q-statistics in hadronic production
  processes?

abstract:
  The extended Gaussian ensemble introduced recently as a generalization of the
canonical ensemble, which allows to treat energy fluctuations present in the
system, is used to analyze the inelasticity distributions in high energy
multiparticle production processes.


title:
Non-factorizable contributions to $\bar{B^0_d} \to D_s^{(*)}
  \bar{D_s^{(*)}}$ from chiral loops and tree level $1/N_c$ terms

abstract:
  We point out that the amplitudes for the decays $\bar{B}^0 \to D_s^+ D_s^-$
and $\bar{B}^0_s \to D^+ D^-$ have no factorizable contributions. If one or two
of the $D$-mesons in the final state are vectors (i.e $D^*$ 's) there are
relatively small factorizable contributions through the annihilation mechanism.
The dominant contributions to the decay amplitudes arise from chiral loop
contributions and $1/N_c$ suppressed tree level. 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 $(4- 7) \times 10^{-3}$.
  If {\em both} $D$-mesons in the final state are $D^*$'s, we obtain branching
ratios of order two times bigger.


title: S-P wave interference in the K+K- photoproduction on hydrogen

abstract:
  We have studied the partial wave interference effects to obtain a new
information about the contribution of the S-wave to the cross section of the
K+K- photoproduction on hydrogen. The K+K- photoproduction channel for the
effective masses around 1 GeV is dominated by the phi(1020) resonance with only
a small fraction of events coming from decays of scalar resonances f0(980) and
a0(980). However, a careful analysis of angular distributions of the outgoing
kaons shows that the S-wave adds an asymmetry to the angular distribution of
kaons. A fairly precise estimation of the K+K- photoproduction cross section in
the S-wave has been obtained.


title: Weak effects in proton beam asymmetries at polarised RHIC and beyond

abstract:
  We report on a calculation of the full one-loop weak corrections through the
order $\alpha_{\mathrm{S}}^2\alpha_{\mathrm{W}}$ to parton-parton scattering in
all possible channels at the Relativistic Heavy Ion Collider (RHIC) running
with polarised $pp$ beams (RHIC-Spin). This study extends the analysis
previously carried out for the case of $2\to2$ subprocesses with two external
gluons, by including all possible four-quark modes with and without an external
gluon. The additional contributions due to the new four-quarks processes are
extremely large, of order 50 to 100% (of either sign), not only in the case of
parity-violating beam asymmetries but also for the parity-conserving ones and
(although to a more limited extent) the total cross section. Such ${\cal
O}(\alpha_{\mathrm{S}}^2\alpha_{\mathrm{W}})$ effects on the CP-violating
observables would be an astounding 5 times larger for the case of the LHC with
polarised beams -- which has been discussed as one of the possible upgrades of
the CERN machine -- whereas they would be much reduced for the case of the
CP-conserving ones as well as the cross section.


title: Evolving Fundamental Constants and Metrology

abstract:
  Astrophysical observations suggest that the fine structure constant (alpha)
may (or may not) be evolving over the cosmological time scale. This raises a
much debated question: is alpha variation due to the variation of the speed of
light (c), elementary electric charge (e), or the Planck constant (h)?
  Previously, we proposed the metrological approach based on the analysis of
the relationships between the fundamental units (e.g. of the length and time)
and the fundamental constants. Our methodology allows one to find how each of
the fundamental constants e, c, h evolves in time and offers a new outlook for
this area. Here we give a brief outline of this approach and the main results
it produces.


title: Inclusive Production of Four Charm Hadrons at B-Factories

abstract:
  Measurements by the Belle Collaboration of the exclusive J/psi + eta_c and
inclusive J/psi +cc-bar+X productions in e^+ e^- annihilation differ
substantially from theoretical predictions based on the nonrelativistic QCD
factorization approach. In order to test if such a discrepancy is originated
from the large perturbative corrections to the hard-scattering amplitude, we
study inclusive production of four charm hadrons in e^+e^- annihilation at B
factories.


title: Dark Matter from an ultra-light pseudo-Goldsone-boson

abstract:
  Dark Matter (DM) and Dark Energy (DE) can be both described in terms of
ultra-light Pseudo-Goldstone-Bosons (PGB) with masses m_{DM} ~ 10^{-23}eV and
m_{DE} <= 10^{-33}eV respectively. Following Barbieri et al, we entertain the
possibility that a PGB exists with mass m_I intermediate between these two
limits, giving a partial contribution to DM. We evaluate the related effects on
the power spectrum of the matter density perturbations and on the cosmic
microwave background and we derive the bounds on the density fraction, f_I, of
this intermediate field from current data, with room for a better sensitivity
on f_I in the near future. We also give a simple and unified analytic
description of the free streaming effects both for an ultra-light scalar and
for a massive neutrino.


title: X rays test the Pauli exclusion principle

abstract:
  Since the publication of the models describing a small violation of the Pauli
exclusion principle (PEP) there has been an explosion of word-wide interest in
PEP tests and related theories.
  PEP forbids an atom to have more than 2 electrons in the K-shell. If PEP is
slightly violated, a third electron can occasionally join in. This would result
in an anomalous X-ray emission. A high-sensitivity experiment places an upper
limit of the order of 10^{-26} on the PEP violating parameter.
  I will outline the main theoretical and experimental ideas in this new
exciting area.


title: The ALICE detector at LHC

abstract:
  The ALICE experiment at the Large Hadron Collider LHC is presented, and an
overview of its physics program is given. A few specific observables are
discussed in order to illustrate the physics potential of ALICE.


title:
The derivative of the topological susceptibility at zero momentum and an
  estimate of $\eta'$ mass in the chiral limit

abstract:
  The anomaly-anomaly correlator is studied using QCD sum rules. Using the
matrix elements of anomaly between vacuum and pseudoscalars $\pi, eta$ and
$\eta'$, the derivative of correlator $chi'(0)$ is evaluated and found to be
$\approx 1.82 \times 10^{-3}$ GeV$^2$. Assuming that $\chi'(0)$ has no
significant dependence on quark masses, the mass of $\eta'$ in the chiral limit
is found to be $\approx$723 MeV. The same calculation also yields for the
singlet pseudoscalar decay constant in the chiral limit a value of $\approx
178$ MeV.


title:
Chiral effective action of QCD: Precision tests, questions and
  electroweak extensions

abstract:
  This talk first discusses some aspects of the chiral expansion with three
light flavours related to the (non) applicability of the OZI rule. Next, the
extension of ChPT to an effective theory of the full standard model is
considered. Some applications of a systematic description of the coupling
constants by sum rules (e.g. to the determination of quark masses and $K_{l3}$
decays) are presented.


title: Neutrino masses and oscillations

abstract:
  I summarize the status of three--neutrino oscillations that follow from
combining the relevant world's data. The discussion includes the small
parameters Delta_m-sol/Delta_m-atm and \sin^2\theta_{13}, which characterize
the strength of CP violation in neutrino oscillations, the impact of
oscillation data on the prospects for probing the absolute scale of neutrino
mass in \nbb and the robustness of the neutrino oscillation interpretation
itself in the presence of non-standard physics. I also comment on the
theoretical origin of neutrino mass, mentioning recent attemps to explain
current oscillation data.


title: Chiral Symmetry Breaking at Nonzero Chemical Potential

abstract:
  We consider chiral symmetry breaking at nonzero chemical potential and
discuss the relation with the spectrum of the Dirac operator. We solve the so
called Silver Blaze Problem that the chiral condensate at zero temperature does
not depend on the chemical potential while this is not the case for the Dirac
spectrum and the weight of the partition function.


title: Smeared gap equations in crystalline color superconductivity

abstract:
  In the framework of HDET, we discuss an averaging procedure of the NJL
quark-quark interaction lagrangian, treated in the mean field approximation,
for the two flavor LOFF phase of QCD. This procedure gives results which are
valid in domains where Ginzburg-Landau results may be questionable. We compute
and compare the free energy for different LOFF crystalline structures.