title: Radiative Effects on the Chiral Square

abstract:
  We consider general field theories in six dimensions, with two of the
dimensions compactified on a T_{2}/Z_{4} orbifold. Six-dimensional Weyl
fermions propagating on this background give rise to a chiral zero-mode, which
makes them interesting for phenomenological applications. The compact
two-dimensional space is flat and has three conical singularities. We consider
the one-loop structure of these theories, and show that the presence of
logarithmic divergences requires the introduction of counterterms precisely at
these three singular points. We also show that the corresponding localized
operators are rotationally symmetric in the plane of the two extra dimensions,
as expected from the geometry about the singularities. We derive the
propagators for spin-0, spin-1/2 and spin-1 fields in momentum space, in such a
way that the appropriate boundary conditions are satisfied. This allows us to
efficiently calculate loop diagrams in any given model. We give general
expressions for the mass splittings among Kaluza-Klein modes within a given
level. Our results can also be used to obtain interesting KK-parity preserving
interactions among Kaluza-Klein modes. We pay special attention to the
components of six-dimensional gauge fields that transform as scalars under the
four-dimensional Lorentz group. These states provide a characteristic signature
for these scenarios. In particular, we find that they can easily be the
lightest particles in the Kaluza-Klein spectrum.


title: Direct SUSY Dark Matter Detection- Constraints on the Spin Cross Section

abstract:
  The recent WMAP data have confirmed that exotic dark matter together with the
vacuum energy (cosmological constant) dominate in the flat Universe. Thus the
direct dark matter detection, consisting of detecting the recoiling nucleus, is
central to particle physics and cosmology. Supersymmetry provides a natural
dark matter candidate, the lightest supersymmetric particle (LSP). The relevant
cross sections arise out of two mechanisms: i) The coherent mode, due to the
scalar interaction and ii) The spin contribution arising from the axial
current. In this paper we will focus on the spin contribution, which maybe
important, especially for light targets.


title: The Polarized and Unpolarized Photon Content of the Nucleon

abstract:
  In this thesis the polarized and unpolarized photon distributions of the
nucleon (proton, neutron) $(\Delta)\gamma^N$, evaluated in the equivalent
photon approximation (EPA), are computed theoretically and the possibility of
their experimental determination is demonstrated. Both of them consist of two
components: the elastic ones, $(\Delta)\gamma^N_{\rm el}$, due to $N\to \gamma
N $, and the inelastic ones, $(\Delta)\gamma^N_{\rm inel}$, due to $N\to \gamma
X$, with $X \neq N$. Special attention is devoted to the QED Compton process in
$e N \to e \gamma N$ and $e N \to e \gamma X$, which is one of the most
important reactions for directly measuring the photon content of the nucleon
and testing the reliability of the EPA. Furthermore, it is discussed how such
measurements can provide additional, independent informations concerning the
usual polarized and unpolarized structure functions.


title: Studies of Gauge Boson Production with a gamma/gamma-collider at TESLA

abstract:
  In absence of the Standard Model Higgs boson the interaction among the gauge
bosons becomes strong at high energies and influences the couplings between
them. Each trilinear and quartic gauge boson vertex is characterised by a set
of couplings which are expected to deviate from their Standard Model values
already at energies lower than the energy scale of the New Physics.The precise
measurement of gauge boson couplings can provide clues to the mechanism of the
electroweak symmetry breaking and their anomalous values can be a sign of a New
Physics effect beyond the Standard Model. The estimated precisions of the
trilinear gauge boson coupling (TGC) measurements at a photon collider are
about one to two orders of magnitude higher than at LEP and Tevatron providing
a measurement highly sensitive to the physics beyond the Standard Model. The
optimisation of the forward region of the photon collider detector brings the
amount of the low-energy background to the manageable level providing a clean
environment for the TGC measurements at a photon collider with estimated
precisions.


title: Nonequilibrium field theory from the 2PI effective action

abstract:
  Nonperturbative approximation schemes are inevitable even in weakly coupled
theories if the nonequilibrium behavior of quantum fields is investigated. The
two-particle irreducible (2PI) effective action formalism provides an efficient
framework for obtaining resummation schemes both in and out of equilibrium. We
briefly review the these techniques and discuss recent findings for
nonequilibrium field theories.


title: Low Energy Dynamics in Ultradegenerate QCD Matter

abstract:
  We study the low energy behavior of QCD Green functions in the limit that the
baryon chemical potential is much larger than the QCD scale parameter
$\Lambda_QCD$. We show that there is a systematic low energy expansion in
powers of $(\omega/m)^{1/3}$, where $\omega$ is the energy and $m$ is the
screening scale. This expansion is valid even if the effective quark-gluon
coupling $g$ is not small. The expansion is purely perturbative in the magnetic
regime $|\vec{k}| \gg k_0$. If the external momenta and energies satisfy $k_0
\sim |\vec{k}|$, planar, abelian ladder diagrams involving the full quark
propagator have to be resummed but the corresponding Dyson-Schwinger equations
are closed.


title: Electroweak Tests at Beta-beams

abstract:
  We explore the possibility of measuring the Weinberg angle from
(anti)neutrino-electron scattering using low energy beta beams, a method that
produces single flavour neutrino beams from the beta-decay of boosted
radioactive ions. We study how the sensitivity of a possible measurement
depends on the intensity of the ion beam and on a combination of different
Lorentz boosts of the ions.


title:
Hadronic Interactions of Ultra-High Energy Photons with Protons and
  Light Nuclei in the Dipole Picture

abstract:
  We apply the dipole formalism that has been developed to describe low-x deep
inelastic scattering to the case of ultra-high energy real photons with nucleon
and nuclear targets. We hope that there will be future modeling applications in
high-energy particle astrophysics. We modify the dipole model of McDermott,
Frankfurt, Guzey, and Strikman (MFGS) by fixing the cross section at the
maximum value allowed by the unitarity constraint whenever the dipole model
would otherwise predict a unitarity violation. We observe that, under
reasonable assumptions, a significant fraction of the real photon cross section
results from dipole interactions where the QCD coupling constant is small, and
that the MFGS model is consistent with the Froissart bound. The resulting model
predicts a rise of the cross section of about a factor of 12 when the the
photon energy is increased from $10^{3}$ GeV to $10^{12}$ GeV. We extend the
analysis to the case of scattering off a $^{12}$C target. We find that, due to
the low thickness of the light nuclei, unitarity for the scattering off
individual nucleons plays a larger role than for the scattering off the nucleus
as a whole. At the same time the proximity to the black disk limit results in a
substantial increase of the amount of nuclear shadowing. This, in turn, slows
down the rate of increase of the total cross section with energy as compared to
the proton case. As a result we find that the $^{12}$C nuclear cross section
rises by about a factor of 7 when the photon energy is increased from $10^{3}$
GeV to $10^{12}$ GeV. We also find that the fraction of the cross section due
to production of charm reaches 30% for the highest considered energies with a
$^{12}$C target.


title:
Resonant behaviour in double charge exchange reaction of \pi^+ mesons on
  the nuclear photoemulsion

abstract:
  The invariant mass spectra of the $pp\pi^-$ and $pp$ systems produced in the
double charge exchange (DCX) of positively charged pions on photoemulsion are
analysed. A pronounced peak is observed in the $pp\pi^-$ invariant mass
spectrum, while the $M_{pp}$ spectrum exhibits a strong Migdal-Watson effect of
the proton-proton final state interaction. These findings are in favor of the
$NN$-decoupled $NN\pi$ pseudoscalar resonance with T=0 called $d'$.


title:
Tri-bimaximal neutrino mixing from discrete subgroups of SU(3) and SO(3)
  family symmetry

abstract:
  It has recently been shown how tri-bimaximal neutrino mixing can be achieved,
using the see-saw mechanism with constrained sequential dominance, through the
vacuum alignment of a broken non-Abelian gauged family symmetry such as SO(3)
or SU(3). Generalising the approach of Altarelli and Feruglio developed for an
$A_4$ model we show how the reduction of the underlying symmetry to a discrete
subgroup of SO(3) or SU(3) renders this alignment a generic property of such
models. This means near tri-bimaximal mixing can be quite naturally
accommodated in a complete unified theory of quark and lepton masses.


title: Instanton-inspired Model of QCD Phase Transition and Bubble Dynamics

abstract:
  We have reinvestigated the collision of gluonic bubbles in a SU(2) model of
QCD which was studied by Johnson, Choi and Kisslinger in the context of the
instanton-inspired model of QCD phase transition bubbles with plane wave
approximation. We discuss treacherous points of the instanton-inspired model
that cause the violation of causality due to the presence of imaginary gluon
fields. By constructing a new slightly modified Lorentzian model where we have
three independent real gluon fields, we reanalyzed the process of bubble
collisions. Our numerical results show some indication of forming a bubble wall
in colliding region.


title:
Interplay between Hbs and bsgamma in the MSSM with Non-Minimal Flavour
  Violation

abstract:
  We investigate the constraints on flavour-changing neutral heavy Higgs-boson
decays H-> b \bar s from b -> s gamma bounds on the flavour-mixing parameters
of the MSSM with non-minimal flavour violation (NMFV). In our analysis we
include the contributions from the SM and new physics due to general flavour
mixing in the squark mass matrices. We study the case of one and two non-zero
flavour-mixing parameters and find that in the latter case the interference can
raise the Higgs flavour-changing branching ratios by one or two orders of
magnitude with respect to previous predictions based on a single non-zero
parameter and in agreement with present constraints from $B$ physics. In the
course of our work we developed a new "FeynArts" model file for the NMFV MSSM
and added the necessary code for the evaluation to "FormCalc". Both extensions
are publicly available.


title:
Odderon and seven Pomerons: QCD Reggeon field theory from JIMWLK
  evolution

abstract:
  We reinterpret the JIMWLK/KLWMIJ evolution equation as the QCD Reggeon field
theory (RFT). The basic "quantum Reggeon field" in this theory is the unitary
matrix $R$ which represents the single gluon scattering matrix. We discuss the
peculiarities of the Hilbert space on which the RFT Hamiltonian acts. We
develop a perturbative expansion in the RFT framework, and find several
eigenstates of the zeroth order Hamiltonian. The zeroth order of this
perturbation preserves the number of $s$ - channel gluons. The eigenstates have
a natural interpretation in terms of the $t$ - channel exchanges. Studying the
single $s$ - channel gluon sector we find the eigenstates which include the
reggeized gluon and five other colored Reggeons. In the two ($s$ - channel)
gluon sector we study only singlet color exchanges. We find five charge
conjugation even states. The bound state of two reggeized gluons is the
standard BFKL Pomeron. The intercepts of the other Pomerons in the large $N$
limit are $1+\omega_P=1+2\omega$ where $1+\omega$ is the intercept of the BFKL
Pomeron, but their coupling in perturbation theory is suppressed by at least
$1/N^2$ relative to the double BFKL Pomeron exchange. For the $[27,27]$ Pomeron
we find $\omega_{[27,27]}=2\omega+O(1/N)>2\omega$. We also find three charge
conjugation odd exchanges, one of which is the unit intercept
Bartels-Lipatov-Vacca Odderon, while another one has an interecept greater than
unity. We explain in what sense our calculation goes beyond the standard
BFKL/BKP calculation. We make additional comments and discuss open questions in
our approach.


title: Dark Matter and Gamma-Rays From Draco: MAGIC, GLAST and CACTUS

abstract:
  The dwarf spheroidal galaxy Draco has long been considered likely to be one
of the brightest point sources of gamma-rays generated through dark matter
annihilations. Recent studies of this object have found that it remains largely
intact from tidal striping, and may be more massive than previously thought. In
this article, we revisit Draco as a source of dark matter annihilation
radiation, with these new observational constraints in mind. We discuss the
prospects for the experiments MAGIC and GLAST to detect dark matter in Draco,
as well as constraints from the observations of EGRET. We also discuss the
possibility that the CACTUS experiment has already detected gamma-rays from
Draco. We find that it is difficult to generate the flux reported by CACTUS
without resorting to non-thermally produced WIMPs and/or a density spike in
Draco's dark matter distribution due to the presence of an intermediate mass
black hole. We also find that for most annihilation modes, a positive detection
of Draco by CACTUS would be inconsistent with the lack of events seen by EGRET.


title: Density fluctuations in one-field inflation

abstract:
  Any one-field inflation is actually realized in a multifield configuration
because the inflaton must have couplings with other fields to reheat the
universe and is coupled to all other fields at least gravitationally. In all
single inflaton models, it is explicitly or implicitly assumed that the heavier
fields are stuck to their potential minima during inflation, which are
time-dependent in general. We present a formalism to calculate curvature
perturbations in such a time-dependent background and show that the proper
expression can be obtained using a single-field analysis with a reduced
potential in which all these heavy fields are situated at their respective,
time-dependent minima. Our results provide a firm ground on the conventional
calculation.


title:
Extending the Regge description of hadronic forward scattering from the
  multi-TeV down to the GeV region

abstract:
  We provide a simple Regge parametrization of forward hadronic scattering from
the multi-TeV range down to approximately 1 GeV above the threshold of each
reaction.
  We show how, at these relatively low energies, mass effects are relevant and
should be properly taken into account, and that the data favor a logarithmic
growth of the Pomeron contribution that is based on an improved unitarity bound
at intermediate energies as well as a separate factorization of the
singularities. Data on both the imaginary and real parts of amplitudes are
remarkably well described with this parametrization. Here we also show that the
description does not depend on the strategy adopted to include or not
systematic uncertainties in different data sets.


title: Classification of dark energy models in the (w_0,w_a) plane

abstract:
  We classify dark energy models in a plane of observables that correspond to
the common parameterization of a non-constant equation of state, w(a)=w_0 +
w_a(1-a), where $a$ is the scale factor of the universe. The models fall into
four classes and only two of these classes have a region of overlap in the
observable plane. We perform a joint analysis of all Type Ia supernova (SNIa)
data compiled by the High-Z SN Search Team (HZT) and the Supernova Legacy
Survey (SNLS) and find that no class of models is excluded by current SNIa
data. However, an analysis of large scale structure, Ly$\alpha$ forest and bias
constraints from SDSS, the Gold SNIa data and WMAP data indicates that
non-phantom barotropic models with a a positive sound speed are excluded at the
95% C.L.


title: Parity Violation in Chiral Symmetry Breaking and Neutrino

abstract:
  I consider parity violation of the chiral symmetry broken vacuum. It is shown
that the parity of the true vacuum in the chiral symmetry breaking model is
violated. I propose new mechanism of massive neutrino, which the neutrinos have
mass in terms of the chiral symmetry breaking. In this mechanism, it may give
us new understanding why almost neutrinos have left chirality. Further, NJL
model is proposed as alternative phenomenological model of neutrinos.


title: Recoil corrections in the hydrogen isoelectronic sequence

abstract:
  A version of the Bethe-Salpeter equation appropriate for calculating recoil
corrections in highly charged hydrogenlike ions is presented. The nucleus is
treated as a scalar particle of charge Z, and the electron treated
relativistically. The known recoil corrections of order $m^2/M(Z\alpha)^4$ are
derived in both this formalism and in NRQED.


title: Pseudoscalar Photon Mixing In A Magnetized Medium

abstract:
  Axions are pseudo-scalar particles, those arise because of breaking of Peccei
Queen (PQ) symmetry. Axions have a tree level coupling to two photons. As a
consequence there exists a tree level coupling of axion to photon in a magnetic
field. However, in an external magnetic field, there exists a new loop induced,
axion photon vertex, that gives rise to axion photon coupling. The strength of
the tree level axion photon coupling in magnetic field is known to be model
dependent. However in a magnetic field, the new loop induced coupling has some
interesting features. This note discusses the new axion photon vertex in a
magnetized medium and the corrections arising from there. The magnitude of the
correction to axion photon coupling, because of magnetized vacuum and matter is
estimated in this note. While making this estimate we note that the form of the
axion photon vertex is related to the axial polarization tensor. This vertex is
shown to satisfy the Ward identity. The coupling is shown to have a momentum
dependent piece in it. Astrophysical importance of this extra modification is
also pointed out.


title: Electroweak Interaction Model with an Undegenerate Double Symmetry

abstract:
  The initial $P$-invariance of the electroweak interaction Lagrangian together
with the low-energy results of the Weinberg-Salam model is provided by a local
secondary symmetry. Among the transformation parameters of this symmetry there
are both scalars, and pseudo-scalars with respect to the orthochronous Lorentz
group. Such symmetry does admissible existence of a light (massless) axial
gauge boson and its possible nonuniversal interaction with the leptons of
various types.


title: Analytic Perturbation Theory for Practitioners and Upsilon Decay

abstract:
  Within the ghost-free Analytic Perturbation Theory (APT), devised in the last
decade for low energy QCD, simple approximations are proposed for 3-loop
analytic couplings and their effective powers, in both the space-like
(Euclidean) and time-like (Minkowskian) regions, accurate enough in the large
range (1--100 GeV) of current physical interest.\par Effectiveness of the new
Model is illustrated by the example of $\Upsilon(1\mathrm{S})$ decay where the
standard analysis gives $\alpha_s(M_{\Upsilon})=0.170\pm 0.004$ value that is
inconsistent with the bulk of data for $\alpha_s$.
  Instead, we obtain $\alpha_s^{Mod}(M_{\Upsilon})=0.185\pm 0.005$ that
corresponds to $\alpha_s^{Mod}(M_Z)=0.120\pm 0.002 $ that is close to the world
average.\par The issue of scale uncertainty for $\Upsilon$ decay is also
discussed.


title: Local Grand Unification

abstract:
  In the standard model matter fields form complete representations of a grand
unified group whereas Higgs fields belong to incomplete `split' multiplets.
This remarkable fact is naturally explained by `local grand unification' in
higher-dimensional extensions of the standard model. Here, the generations of
matter fields are localized in regions of compact space which are endowed with
a GUT gauge symmetry whereas the Higgs doublets are bulk fields. We realize
local grand unification in the framework of orbifold compactifications of the
heterotic string, and we present an example with SO(10) as a local GUT group,
which leads to the supersymmetric standard model as an effective
four-dimensional theory. We also discuss different orbifold GUT limits and the
unification of gauge and Yukawa couplings.


title: On Two-Body Decays of A Scalar Glueball

abstract:
  We study two body decays of a scalar glueball. We show that in QCD a spin-0
pure glueball (a state only with gluons) cannot decay into a pair of light
quarks if chiral symmetry holds exactly, i.e., the decay amplitude is chirally
suppressed. However, this chiral suppression does not materialize itself at the
hadron level such as in decays into $\pi^+\pi^-$ and $K^+K^-$, because in
perturbative QCD the glueball couples to two (but not one) light quark pairs
that hadronize to two mesons. Using QCD factorization based on an effective
Lagrangian, we show that the difference of hadronization into $\pi\pi$ and $KK$
already leads to a large difference between ${\rm Br} (\pi^+\pi^-)$ and ${\rm
Br}(K^+K^-)$, even the decay amplitude is not chirally suppressed. Moreover,
the small ratio of $R={\rm Br}(\pi\pi)/{\rm Br}(K\bar K)$ of $f_0(1710)$
measured in experiment does not imply $f_0(1710)$ to be a pure glueball. With
our results it is helpful to understand the partonic contents if ${\rm
Br}(\pi\pi)$ or ${\rm Br}(K\bar K)$ is measured reliably.


title: Possible improvements of higgs trigger at LHC

abstract:
  In this work we consider two ways to improve signal to background
cross-sections ratio for higgs searchings at LHC: likelyhood method and
advanced rapidity trigger. Both methods are universal enough, likelyhood method
can be applied to any processes with many observables, and advanced rapidity
trigger can separate any colourless scattering processes and processes with
colour charge at $t$ channel.


title:
Measurement of the exclusive light hadron decays of the psi'' in e+e-
  experiments

abstract:
  The measurement of the exclusive light hadron decays of the psi'' in e+e-
experiments with significant interference between the psi'' and non-resonance
continuum amplitudes is discussed. The radiative correction and the Monte Carlo
simulation are studied. A possible scheme to verify the destructive
interference is proposed for the detectors with energy-momentum resolution of
(1-2)%.


title:
The Tenth-Order QED Contribution to the Lepton g-2: Evaluation of
  Dominant $\alpha^5$ Terms of Muon g-2

abstract:
  The QED contribution to the anomalous magnetic moments of electron and muon
are known very precisely up to the order $\alpha^4$. However, the knowledge of
$\alpha^5$ term will also be required when the precision of measurement
improves further. This paper reports the first systematic attempt to evaluate
the $\alpha^5$ term. Feynman diagrams contributing to this term can be
classified into six gauge-invariant sets which can be subdivided further into
32 gauge-invariant subsets. Thus far we have numerically evaluated all
integrals of 17 gauge-invariant subsets which contain light-by-light-scattering
subdiagrams and/or vacuum-polarization subdiagrams. They cover most of leading
terms of muon $g-2$ and lead to a preliminary result 663(20) $(\alpha/\pi)^5$,
which is 8.5 times more precise than the old estimate.


title: On the Leading ORder Hadronic Contribution to (g-2)_mu

abstract:
  Sum rule constraints dominated by the independent high-scale input,
alpha_s(M_Z), are shown to be satisfied by I=1 spectral data from hadronic tau
decays, but violated by the pre-2005 electroproduction (EM) cross-section data.
Determinations of the Standard Model (SM) hadronic contribution to (g-2)_mu
incorporating tau decay data are thus favored over those based solely on EM
data, implying a SM prediction for (g-2)_mu in agreement with current
experimental results.


title: Towards a Geometric Approach to the Formulation of the Standard Model

abstract:
  A geometric interpretation of the spontaneous symmetry breaking effect, which
plays a key role in the Standard Model, is developed. The advocated approach is
related to the effective use of the momentum 4-spaces of the constant
curvature, de Sitter and anti de Sitter, in the apparatus of quantum field
theory.


title: SU(2) Family Symmetry and the Supersymmetric Spectrum

abstract:
  We present a supersymmetric extension of the Standard Model with a gauged
SU(2) family symmetry for the leptons. It is shown that this family symmetry
can be consistently broken at the TeV scale along with supersymmetry. If
supersymmetry breaking is driven by anomaly mediation, this model can provide
positive squared masses for the sleptons and thus cure the tachyon problem. We
analyze the constraints and consequences of this scenario. A characteristic
feature of this model is the non-degeneracy of the first two family sleptons.
The model predicts large value of tan(beta) and observable \tau to e \gamma and
B to \mu^+ \mu^- decay rates.


title: An Effective Operators Analysis of CP Violation : The Semileptonic Case

abstract:
  Aiming at a model-independent analysis of possible new physics effects in
semileptonic processes at various energy scales, we list and study a complete
set of $SU(3)_c\times SU(2)_L\times U(1)_Y$ invariant 4-Fermi operators which
consist of a pair of quarks and a pair of leptons above the electroweak
symmetry breaking. We give a full 1-loop renormalization group treatment of the
evolution of the Wilson coefficients associated with these 4-Fermi operators
between low energy ($\sim$ meson masses) and the cutoff scale $\Lambda$, $\sim
(1-10)$ TeV, where we assume new degree of freedom beyond standard model will
begin to appear and an ultra-violet completion of our effective theory will
take place.
  Motivated by the existing phenomenological bounds, we argue that the new CP
violation can only stem from the scalar and tensor types of 4-Fermi
interaction. Some interesting constraints are obtained by studying the
universality of kaon and pion leptonic decays, CP violating polarization of
$K^+_{\mu 3}$, charged lepton anomalous magnetic moments, and $(\mu\ra e
\gamma)$ like rare decays. In particular, we can use the limit of electron
dipole moment to constrain the size of the CP violating triplet correlation in
the $e^+ e^- \ra t \bar{t}$ process.


title: Doubly Charmful Baryonic B Decays

abstract:
  There are two apparent puzzles connected with the two-body and three-body
doubly charmed baryonic B decays. First, earlier calculations based on QCD sum
rules or the diquark model predict $Br(\bar
B^0\to\Xi_c^+\bar\Lambda_c^-)\approx Br(\bar B^0\to\B_c\bar N)$, while
experimentally the former has a rate two orders of magnitude larger than the
latter. Second, a naive estimate of the branching ratio $10^{-9}$ for the
color-suppressed three-body decay $\bar B\to\Lambda_c^+\bar\Lambda_c^-K$, which
is highly suppressed by phase space, is too small by five to six orders of
magnitude compared to experiment. We show that the great suppression for the
$\Lambda_c^+\bar\Lambda_c^-K$ production can be alleviated provided that there
exists a narrow hidden charm bound state with a mass near the
$\Lambda_c\bar\Lambda_c$ threshold. This new state that couples strongly to the
charmed baryon pair can be searched for in B decays and in $p\bar p$ collisions
by studying the mass spectrum of $D^{(*)}\bar D^{(*)}$ or
$\Lambda_c\bar\Lambda_c$. The doubly charmful decay $\bar
B\to\Xi_c\bar\Lambda_c$ has a configuration more favorable than the singly
charmful one such as $\bar B^0\to\Lambda_c\bar p$ since no hard gluon is needed
to produce the energetic $\Xi_c\bar\Lambda_c$ pair in the former decay, while
two hard gluons are needed for the latter process. Assuming that a soft $q\bar
q$ quark pair is produced through the $\sigma$ and $\pi$ meson exchanges in the
configuration for $\bar B\to \Xi_c\bar\Lambda_c$, it is found that its
branching ratio is of order $10^{-3}$, in agreement with experiment.


title: The Nucleon and Roper Resonance in a Chiral Quark Diquark Model

abstract:
  A description of the nucleon and Roper resonance in a quark-diquark approach
is presented. We show that two states with the quantum number of the nucleon
can appear in the ground state of the spatial configuration, when there are two
types of diquarks: scalar-isoscalar and axial-vector-isovector diquarks. The
mass difference between the two states is generated by the mass difference
between the two diquarks, which is due to the spin-spin interaction between the
two quarks in the diquarks. The two states are then identified with the nucleon
and Roper resonance.


title:
The re-analysis of the 1700 MeV structure of the P11 partial wave using
  the piN->KLambda production data

abstract:
  We have used the Breit-Wigner resonance model with S11, P11 and P13
resonances in the s-channel to re-analyze the old piN -> KLambda data with the
aim to establish the origin of the prominent structure in the total cross
section in the vicinity of 1700 MeV. In this paper we show that, at least in
the Breit-Wigner resonance model, it is not possible to achieve the detailed
reproduction of the narrow 1700 MeV total cross section peak using the standard
partial widths. We have found the new set of resonance parameters enforcing the
experimentally observed structure of the total cross section data
simultaneously with the linear dependence of the differential cross sections
with the cos(Theta) in the energy range 1650 MeV < W < 1800 MeV. The result is
that the P13 partial wave has been strongly attenuated in this model. To
understand the phenomenon, a much narrower width of a resonant state, the
N(1710) P11 in our case, is required, but then the agreement of the model
predictions with total cross section data at higher energies is lost. One way
out is to allow for the existence of the second P11 resonance in that energy
range. The same feature is shown by the polarization data. Analyzing the qqq or
qqqq(qbar) nature of the recommended narrow P11 structure in the neighbourhood
of 1700 MeV we re-open (remind of) the possibility that another P11 resonant
state exists in addition to the standard N(1710) P11 PDG-resonance, and that
one of the two states can be identified with the yet undiscovered cryptoexotic
pentaquark state. To clarify the situation, we strongly recommend remeasurement
of the piN -> KLambda process in the energy range 1650 MeV < W < 1800 MeV.


title:
Focus points and the Lightest Higgs Boson Mass in the Minimal
  Supersymmetric Standard Model

abstract:
  We investigate focus points of the renormalization group equations of the
Minimal Supersymmetric Standard Model. We show that within this model the up-
and down-type Higgs mass soft supersymmetry breaking parameters have focus
point behavior at the electroweak scale simultaneously when appropriate
conditions are fulfilled. The focus point scenario is holding for large $\tan
\beta$. This two focus point scenario allows to fix the pole top-quark mass
which is within the experimentally allowed interval. The main goal of the
present paper is the investigation of the influence of the existence of focus
points on the determination of the mass of the lightest Higgs boson.


title:
Stable perturbative QCD predictions at moderate energies with a modified
  couplant

abstract:
  The problem of precise evaluation of perturbative QCD predictions at moderate
energies is addressed. In order to improve stability of the predictions with
respect to change of the renormalization scheme it is proposed to replace the
sequence of conventional renormalization group improved approximants by a
sequence of modified approximants, involving a modified running coupling
constant, which is free from Landau singularity and much less renormalization
scheme depenedent than the conventional running coupling constant. A concrete
model of the modified coupling constant is proposed and it is shown, that the
QCD corrections to the static interquark potential evaluated with this coupling
constant are indeed much less sensitive to the scheme parameters. It is pointed
out, that the modified predictions display somewhat weaker energy dependence
compared to the conventional predictions, which may help accomodate in a
consistent way some very low and very high energy determinations of the strong
coupling constant.


title: On higher order corrections to photon structure functions

abstract:
  The QCD corrections to photon structure functions are defined in a way
consistent with the factorization scheme invariance. It is shown that the
conventional DIS$_{\gamma}$ factorization scheme does not respect this
invariance and is thus deeply flawed. The origins of the divergent behavior of
photonic coefficient function at large $x$ are analyzed and recipe to remove it
is suggested.


title: Not satisfied about the analysis

abstract: The authors are not satisfied about the analysis.


title: TASI Lecture Notes: Introduction to Precision Electroweak Analysis

abstract:
  I give a basic introduction to precision electroweak analysis, beginning with
calculation at tree-level which most simply illustrates the procedure. I then
work out the formalism for one-loop corrections to the vector boson self
energies (oblique corrections). This is a tractable subset of the complete
electroweak program. Not only does this exercise provide an analytically
accessible demonstration of the theory involved in electroweak precision
analyses, it also teaches students a useful technique to analyze a large class
of theories beyond the Standard Model.


title:
Dipole amplitude correlation in saturation model beyond mean field
  approximation

abstract:
  In this paper we calculate dipole amplitude and dipole amplitude correlations
using first and second equation from Balitsky-Kovchegov hierarchy. Our analysis
shows that even in presence of weak dipole correlation in initial condition
mean field approximation breaks down through evolution. This difference
asymptotically grows not only by absolute value but also by relative difference
of dipole correlation from mean field value. This could affect physical values
related to dipole correlation such as elliptic flow $v_2$ and 'back-forward'
asymmetry in saturation model.


title: Quantum Chromodynamics

abstract:
  Quantum chromodynamics is the quantum gauge field theory that describes the
strong interactions. This article reviews the basic structure, successes and
challenges of quantum chromodynamics as it manifests itself at short and long
distances, including the concepts of asymptotic freedom, confinement and
infrared safety.


title: Fragmentation, NRQCD and Factorization in Heavy Quarkonium Production

abstract:
  We discuss factorization in heavy quarkonium production in high energy
collisions using NRQCD. Infrared divergences at NNLO are not matched by
conventional NRQCD matrix elements. However, we show that gauge invariance and
factorization require that conventional NRQCD production matrix elements be
modified to include Wilson lines or non-abelian gauge links. With this
modification NRQCD factorization for heavy quarkonium production is restored at
NNLO.


title: Family Structure of Leptons and Their Currents of an Axial Vector Nature

abstract:
  Each of neutrinos has a non - zero mass and regardless of whether it is a
Dirac or a Majorana mass, can possess both anapole and electric dipole moments.
Between their form factors appears a connection, for example, at the
longitudinal neutrinos scattering on spinless nuclei. We discuss a theory, in
which a mass consists of vector and axial - vector components responsible for
separateness of leptonic current into the vector and axial - vector parts of
the same charge or dipole moment. Such a model can explain the absence of truly
neutral neutrinos vector interactions and the availability of an axial - vector
structure of a Majorana mass. Thereby it relates the two neutrinos of a
different nature. We derive an equation which unites the masses to a ratio of
the anapole and electric dipole form factors of any lepton and its neutrino as
a consequence of their unification in families of doublets and singlets. This
testifies in favor of the existence of the left (right) dileptons and
paradileptons of the axial - vector currents. Each of them answers to
conservation of an axial - vector charge and any lepton flavor. Therefore, an
axial - vector mass, anapole and electric dipole moment of the neutrino become
proportional respectively to an axial - vector mass, anapole and electric
dipole moment of a particle of the same families.


title: Rare decays of B-> J/\psi D^(*) and B->\eta_c D^(*)in pQCD Approach

abstract:
  Motivated by the recent measurement of the upper limit of ${B}^0 \to J/\psi
D$ branching ratio, which is important in accounting for the soft $J/\psi$
production in B decays, we investigate ${B}^0 \to J/\psi D^{(\star)}$ and
$\eta_c D^{(\star)}$ decays in perturbative QCD approach based on $k_T$
factorization. Being pure annihilation (W-exchange) decays, these branching
ratios are estimated to be at the order of $10^{-5} \sim 10^{-7}$, which are
just at the corner of being observable at the $B$ factories. The measurements
of these decay channels may help us to understand the QCD dynamics in the
corresponding energy scale, especially the reliability of pQCD approach to
these processes.


title: Drell-Yan process in soft-collinear effective theory near end-point

abstract:
  The Drell-Yan process is analyzed in soft-collinear effective theory near the
end-point region. It is assumed that the relevant final-state hadron energy
$Q(1-z)$ where $z$ is the momentum fraction transferred to the virtual photon
is the typical hadronic scale $\sim\Lambda$, thus no intermediate scale exists.
It is shown that this setup successfully reproduces the full theory results. We
also discuss the factorized soft Wilson lines for the Drell-Yan process.


title:
Field-induced interaction of a pseudoscalar particle with photon in a
  magnetized $e^-e^+$ plasma

abstract:
  The effective interaction of a pseudoscalar particle with photon in plasma
with the presence of a constant uniform magnetic field is investigated. It is
shown that under some physical conditions the effective coupling between
pseudoscalar particle and photon does not depend on medium parameters and
particles momentum. The probability of the familon decay into photon pair in a
strongly magnetized degenerate ultrarelativistic plasma is calculated.


title: Baryogenesis via Leptogenesis in presence of cosmic strings

abstract:
  We study the effect on leptogenesis due to $B-L$ cosmic strings of a
$U(1)_{B-L}$ extension of the Standard Model. The disappearance of closed loops
of $B-L$ cosmic strings can produce heavy right handed neutrinos, $N_R$'s,
whose CP-asymmetric decay in out-of-thermal equilibrium condition can give rise
to a net lepton ($L$) asymmetry which is then converted, due to sphaleron
transitions, to a Baryon ($B$) asymmetry. This is studied by using the relevant
Boltzmann equations and including the effects of both thermal and string
generated non-thermal $N_R$'s. We explore the parameter region spanned by the
effective light neutrino mass parameter $\tilde{m}_1$, the mass $M_1$ of the
lightest of the heavy right-handed neutrinos (or equivalently the Yukawa
coupling $h_1$) and the scale of $B-L$ symmetry breaking, $\eta_{B-L}$, and
show that there exist ranges of values of these parameters, in particular with
$\eta_{B-L} > 10^{11}\gev$ and $h_1\gsim 0.01$, for which the cosmic string
generated non-thermal $N_R$'s can give the dominant contribution to, and indeed
produce, the observed Baryon Asymmetry of the Universe when the purely thermal
leptogenesis mechanism is not sufficient. We also discuss how, depending on the
values of $\eta_{B-L}$, $\tilde{m}_1$ and $h_1$, our results lead to upper
bounds on $\sin\delta$, where $\delta$ is the the CP violating phase that
determines the CP asymmetry in the decay of the heavy right handed neutrino
responsible for generating the $L$-asymmetry.


title: Spectator scattering at NLO in non-leptonic B decays: Tree amplitudes

abstract:
  We compute the 1-loop (alpha_s^2) correction to hard spectator scattering in
non-leptonic B decay tree amplitudes. This forms part of the NNLO contribution
to the QCD factorization formula for hadronic B decays, and introduces a new
rescattering phase that corrects the leading-order result for direct CP
asymmetries. Among the technical issues, we discuss the cancellation of
infrared divergences, and the treatment of evanescent four-quark operators. The
infrared finiteness of our result establishes factorization of spectator
scattering at the 1-loop order. Depending on the values of hadronic input
parameters, the new 1-loop correction may have a significant impact on
tree-dominated decays such as B -> pi pi.


title:
Generalized structure of hadron-quark vertex function in Bethe-Salpeter
  framework: Applications to leptonic decays of V-mesons

abstract:
  We employ the framework of Bethe-Salpeter equation under Covariant
Instantaneous Ansatz (CIA) to study the leptonic decays of vector mesons. The
structure of hadron-quark vertex function Gamma is generalized to include
various Dirac covariants (other than i gamma dot epsilon) from their complete
set. They are incorporated in accordance with a naive power counting rule order
by order in powers of the inverse of the meson mass. The decay constants for
rho omega and phi mesons are calculated with the incorporation of leading order
covariants.


title:
Principle of minimum complexity as a new principle in hadronic
  scattering

abstract:
  In this paper a measure of complexity of the system of angle-angular momentum
quantum states produced in hadronic scattering is introduced in terms of the
scattering entropies. We presented strong experimental evidence for the
saturation of the entropic optimal limits in the pion-nucleon and kaon-nucleon
scatterings. The validity of a principle of minimum complexity in hadronic
interaction is supported with high accuracy (CL>99%) by the experimental data
on pion-nucleon especially at energies higher than 2 GeV.


title: Mass spectra of radially and orbitally excited states of mesons

abstract:
  Meson mass spectra, evaluated in the framework of the relativistic model of
quasi-independent quarks, are presented. Mass values are obtained with the help
of numerical calculations based on the Dirac equation and by phenomenological
mass formulae. The Dirac equation involves the potential, which is sum of the
vector quasi-Coulombic potential and the scalar linear rising confinement
potential. The phenomenological mass formulae are applied to excited meson
states consisting of u-, d-quarks and antiquarks with isotopical spin I=1. A
comparison of the evaluated mass spectra with existing data is performed.
Problems of identification of some meson states in vector and scalar channels
are discussed.


title: SU(3) systematization of baryons

abstract:
  We review the spectrum of all baryons with the mass less than approximately
2000-2200 MeV using methods based on the approximate flavor SU(3) symmetry of
the strong interaction. The application of the Gell-Mann--Okubo mass formulas
and SU(3)-symmetric predictions for two-body hadronic decays allows us to
successfully catalogue almost all known baryons in twenty-one SU(3) multiplets.
In order to have complete multiplets, we predict the existence of several
strange particles, most notably the \Lambda hyperon with J^P=3/2^-, the mass
around 1850 MeV, the total width approximately 130 MeV, significant branching
into the \Sigma \pi and \Sigma(1385) \pi states and a very small coupling to
the N \bar{K} state. Assuming that the antidecuplet exists, we show how a
simple scenario, in which the antidecuplet mixes with an octet, allows to
understand the pattern of the antidecuplet decays and make predictions for the
unmeasured decays.


title: Localized U(1) Gauge Fields, Millicharged Particles, and Holography

abstract:
  We consider U(1) gauge fields in a slice of AdS_5 with bulk and boundary mass
parameters. The zero mode of a bulk U(1) gauge field can be localized either on
the UV or IR brane. This leads to a simple model of millicharged particles in
which fermions can have arbitrarily small electric charge. In the electroweak
sector we also discuss phenomenological implications of a localized U(1)_Y
gauge boson. Using the AdS/CFT correspondence we present the 4D holographic
interpretation of the 5D model. In particular the photon is shown to be a
composite particle when localized near the IR brane, whereas it is elementary
when localized near the UV brane. In the dual interpretation the
``millicharge'' results from an elementary fermion coupling to a composite
photon via a vector current with large anomalous dimension.


title:
Combined Analysis of Two- and Three-Particle Correlations in q,p-Bose
  Gas Model

abstract:
  q-deformed oscillators and the q-Bose gas model enable effective description
of the observed non-Bose type behavior of the intercept ("strength")
$\lambda^{(2)}\equiv C^{(2)}(K,K)-1$ of two-particle correlation function
$C^{(2)}(p_1,p_2)$ of identical pions produced in heavy-ion collisions. Three-
and n-particle correlation functions of pions (or kaons) encode more
information on the nature of the emitting sources in such experiments. And so,
the q-Bose gas model was further developed: the intercepts of n-th order
correlators of q-bosons and the n-particle correlation intercepts within the
q,p-Bose gas model have been obtained, the result useful for quantum optics,
too. Here we present the combined analysis of two- and three-pion correlation
intercepts for the q-Bose gas model and its q,p-extension, and confront with
empirical data (from CERN SPS and STAR/RHIC) on pion correlations. Similar to
explicit dependence of $\lambda^{(2)}$ on mean momenta of particles (pions,
kaons) found earlier, here we explore the peculiar behavior, versus mean
momentum, of the 3-particle correlation intercept $\lambda^{(3)}(K)$. The whole
approach implies complete chaoticity of sources, unlike other joint
descriptions of two- and three-pion correlations using two phenomenological
parameters (e.g., core-halo fraction plus partial coherence of sources).

categories: hep-ph cond-mat.stat-mech hep-th nucl-ex nucl-th


title:
NNLO Logarithmic Expansions and Exact Solutions of the DGLAP Equations
  from x-Space: New Algorithms for Precision Studies at the LHC

abstract:
  A NNLO analysis of certain logarithmic expansions, developed for precision
studies of the evolution of the QCD parton distributions (pdf) at the Large
Hadron Collider, is presented. We elaborate on their relations to all the
solutions of the DGLAP equations that have been hitherto obtained from Mellin
space, to which are equivalent. Exact expansions, equivalent to exact solutions
of the equations, are constructed in the non-singlet sector. The algorithmic
features of our approach are also emphasized, since this method allows to
obtain numerical solutions of the evolution equations with the same accuracy of
other methods, based on Mellin space, and of brute force methods, which solve
the equations by finite differences. The implementation of our analysis allows
to compare with existing benchmarks for the evolution of the pdf's, useful for
applications at the LHC, and to extend them significantly in a systematic
fashion, especially when solutions that retain logarithmic corrections only of
a certain accuracy are searched for.


title: Exclusive $B \to V \gamma$ decays in the T2HDM

abstract:
  By employing the QCD factorization approach for the exclusive $B \to V
\gamma$ decays, we calculated the new physics contributions to the branching
ratios, CP asymmetries, isospin and U-spin symmetry breaking of $B \to
K^*\gamma$ and $B \to \rho \gamma$ decays, induced by the charged Higgs penguin
diagrams appeared in the top-quark two-Higgs-doublet model(T2HDM). Within the
considered parameter space, we found that (a) a charged-Higgs boson with a mass
larger than 300 GeV are always allowed by the date of $B \to V \gamma$ decay,
and such lower limit on $\mhp$ are comparable with those obtained from the
inclusive $B \to X_s \gamma$ decay; (b) the CP asymmetry of $B \to \rho \gamma$
in the T2HDM can be as large as 10% in magnitude and has a strong dependence on
the angle $\theta$ and the CKM angle $\gamma$; (c) the isospin symmetry
breakings of $B \to V \gamma$ decays in the T2HDM are generally small in size:
around 6% for $B \to K^* \gamma$ decay and less than 20% for $B \to \rho
\gamma$ decay; and (d) the U-spin symmetry breaking $\Delta U(K^*,\rho)$ in the
T2HDM is also small in size, only about 8% of the branching ratio $\calb (B \to
\rho^0 \gamma)$.


title: Enhanced mu-e conversion in nuclei in the inverse seesaw model

abstract:
  We investigate nuclear mu-e conversion in the framework of an effective
Lagrangian arising from the inverse seesaw model of neutrino masses. We
consider lepton flavour violation interactions that arise from short range
(non-photonic) as well as long range (photonic) contributions. Upper bounds for
the LFV parameters characterizing mu-e conversion are derived in the inverse
seesaw model Lagrangian using the available limits on the mu-e conversion
branching ratio, as well as the expected sensitivities of upcoming experiments.
We comment on the relative importance of these two types of contributions and
their relationship with the measured solar neutrino mixing angle theta_12 and
the dependence on theta_13. Finally we show how the LFV mu-e conversion and the
mu -> e gamma rates are strongly correlated in this model.


title: On the nature of the Lambda(1405) as a superposition of two states

abstract:
  We use recent data on the $K^- p \to \pi^0 \pi^0 \Sigma^0$ reaction with the
$\pi^0 \Sigma^0$ mass distribution of forming the $\Lambda(1405)$ with a peak
at 1420 MeV and a relatively narrow width of $\Gamma = 38$ MeV, together with
those of the $\pi^- p \to K^0 \pi \Sigma$ reaction to show that there are two
$\Lambda(1405)$ states instead of one as so far assumed.


title: Particle escape into extra space

abstract:
  We focus on escape of a spin integer particle the challenge for which is of
course that the corresponding field equation contains the second order time
derivative and, in general, may be problematic for interpreting the
extra-dimensional part of the field as a wave function for the KK modes as it
is usually regarded.


title: \Theta^+ and \Lambda(1520) production in pp reactions at high energies

abstract:
  We estimate the cross sections for the inclusive production of $\Theta^+$ and
$\Lambda(1520)$ in $pp$ collisions at high energy using the $K$ exchange
diagrams. We find that inclusive $\Theta^+$ production should be at the level
of 1 $\mu$b at energies~ $\sqrt{s}~\gtrsim~10~{\rm GeV}$. The ratio of
$\Theta^+(1540)$ to $\Lambda(1520)$ production cross-sections is $\sim 1%$.


title: Mass and width of the lowest resonance in QCD

abstract:
  We demonstrate that near the threshold, the pi pi scattering amplitude
contains a pole with the quantum numbers of the vacuum - commonly referred to
as the sigma - and determine its mass and width within small uncertainties. Our
derivation does not involve models or parametrizations, but relies on a
straightforward calculation based on the Roy equation for the isoscalar S-wave.


title: Simulations from a new neutrino event generator

abstract:
  We construct a new Monte Carlo generator of events for neutrino interactions.
The dynamical models for quasi-elastic reactions, $\Delta$ excitation and more
inelastic events described by the DIS formalism with the PDFs modified
according to recent JLab data are used. We describe in detail single pion
production channels, which combine the $\Delta$ excitation and DIS
contribution. Many comparisons of the outcome of simulations with experimental
data are presented.


title: Fluctuations near the deconfinement phase transition boundary

abstract:
  In this talk I discuss how a first order phase transition may proceed in
rapidly expanding partonic matter produced in a relativistic heavy-ion
collision. The resulting picture is that a strong collective flow of matter
will lead to the fragmentation of a metastable phase into droplets. If the
transition from quark-gluon plasma to hadron gas is of the first order, it will
manifest itself by strong nonstatistical fluctuations in observable hadron
distributions. I discuss shortly existing experimental data on the multiplicity
fluctuations.


title: Baryon Inhomogeneity Generation in the Quark-Gluon Plasma Phase

abstract:
  We discuss the possibility of generation of baryon inhomogeneities in a
quark-gluon plasma phase due to moving Z(3) interfaces. By modeling the
dependence of effective mass of the quarks on the Polyakov loop order
parameter, we study the reflection of quarks from collapsing Z(3) interfaces
and estimate resulting baryon inhomogeneities in the context of the early
universe. We argue that in the context of certain low energy scale inflationary
models, it is possible that large Z(3) walls arise at the end of the reheating
stage. Collapse of such walls could lead to baryon inhomogeneities which may be
separated by large distances near the QCD scale. Importantly, the generation of
these inhomogeneities is insensitive to the order, or even the existence, of
the quark-hadron phase transition. We also briefly discuss the possibility of
formation of quark nuggets in this model, as well as baryon inhomogeneity
generation in relativistic heavy-ion collisions.


title: Not so imaginary (penguin) annihilation diagrams in PQCD

abstract: This paper has been withdrawn by the author.


title: Model-independent Study of Magnetic Dipole Transitions in Quarkonium

abstract:
  We study magnetic dipole (M1) transitions between two quarkonia in the
framework of non-relativistic effective field theories of QCD. Relativistic
corrections of relative order v^2 are investigated in a systematic fashion.
Non-perturbative corrections due to color-octet effects are considered for the
first time and shown to vanish at leading order. Exact, all order expressions
for the relevant 1/m and 1/m^2 operators are derived. The results allow us to
scrutinize several potential model claims. In particular, we show that QCD
excludes both contributions to the anomalous magnetic moment of the quarkonium
induced by low-energy fluctuations and contributions to the magnetic dipole
operators of the type induced by a scalar potential. Finally, we apply our
results to the transitions J/psi -> eta_c gamma, Upsilon(1S) -> eta_b gamma,
Upsilon(2S) -> eta_b(2S) gamma, Upsilon(2S) -> eta_b gamma, eta_b(2S) ->
Upsilon(1S) gamma, h_b(1P) -> chi_{b0,1}(1P) gamma and chi_{b2}(1P) -> h_b(1P)
gamma by assuming these quarkonium states in the weak-coupling regime. Our
analysis shows that the J/psi -> eta_c gamma width is consistent with a
weak-coupling treatment of the charmonium ground state, while such a treatment
for the hindered transition Upsilon(2S) -> eta_b gamma appears difficult to
accommodate within the CLEO III upper limit.


title:
Heavy quarkonium decays and transitions in the language of effective
  field theories

abstract:
  Heavy quarkonium decays and transitions are discussed in the framework of
non-relativistic effective field theories. Emphasis is put on the matching
procedure in the non-perturbative regime. Some exact results valid for the
magnetic dipole couplings are discussed.


title: Testing Higgs sector of 2HDM

abstract:
  Properties of the Higgs sector of Two Higgs Doublet Model (2HDM) and existing
constraints on its parameters are discussed. Potential of the Photon Linear
Collider in testing various Higgs scenarios of 2HDM, including the MSSM, based
on the realistic simulations is also presented.


title: Transverse Momentum in Semi-inclusive Deep Inelastic Scattering

abstract:
  Within the framework of perturbative Quantum Chromodynamics we derive
transverse momentum dependent distributions describing both current and target
fragmentation in semi-inclusive Deep Inelastic Scattering. We present, to
leading logarithmic accuracy, the corresponding crosssections describing final
state hadrons on the whole phase space. Phenomenological implications and
further developments are briefly discussed.


title: Mass eigenstates and mass eigenvalues of seesaw

abstract:
  The light neutrino mass spectrum and mixing matrix of seesaw model including
three right-handed neutrinos are studied for the most general case. An
approximate formulae for mass eigenvalues, mixing matrix, and CP violation of
neutrino oscillations are given.


title: A novel series solution to the renormalization group equation in QCD

abstract:
  Recently, the QCD renormalization group (RG) equation at higher orders in
MS-like renormalization schemes has been solved for the running coupling as a
series expansion in powers of the exact 2-loop order coupling. In this work, we
prove that the power series converges to all orders in perturbation theory.
Solving the RG equation at higher orders, we determine the running coupling as
an implicit function of the 2-loop order running coupling. Then we analyze the
singularity structure of the higher order coupling in the complex 2-loop
coupling plane. This enables us to calculate the radii of convergence of the
series solutions at the 3- and 4-loop orders as a function of the number of
quark flavours $n_{\rm f}$. In parallel, we discuss in some detail the
singularity structure of the ${\bar{\rm MS}}$ coupling at the 3- and 4-loops in
the complex momentum squared plane for $ 0\leq n_{\rm f} \leq 16 $. The
correspondence between the singularity structure of the running coupling in the
complex momentum squared plane and the convergence radius of the series
solution is established. For sufficiently large $n_{\rm f}$ values, we find
that the series converges for all values of the momentum squared variable
$Q^2=-q^2>0$. For lower values of $n_{\rm f}$, in the ${\bar{\rm MS}}$ scheme,
we determine the minimal value of the momentum squared $Q_{\rm min}^2$ above
which the series converges. We study properties of the non-power series
corresponding to the presented power series solution in the QCD Analytic
Perturbation Theory approach of Shirkov and Solovtsov. The Euclidean and
Minkowskian versions of the non-power series are found to be uniformly
convergent over whole ranges of the corresponding momentum squared variables.


title:
Renormalization group equations in a model of generalized hidden local
  symmetry and restoration of chiral symmetry

abstract:
  We study possible restoration patterns of chiral symmetry in a generalized
hidden local symmetry model, which is a low energy effective theory of QCD
including pseudo-scalar, vector and axial-vector mesons. We derive Wilsonian
renormalization group equations and analyze the running couplings and their
fixed points at the chiral restoration point. We find three types of the chiral
restoration, which are classified as the standard, vector manifestation and
intermediate scenarios, respectively. It turns out that the rho and A_1 meson
become massless and their decay into pion is suppressed in all the restoration
patterns. The each restoration scenario violates or fulfills the vector meson
dominance at the critical point in a different manner, which may reflect on the
contributions from the pion to the dilepton spectrum.


title: Neutron -- Mirror Neutron Oscillation: How Fast Might It Be?

abstract:
  This paper has been withdrawn by the authors to avoid redundancy with e-print
hep-ph0507031.


title: TASI 2004 Lecture Notes: Higgs Boson Physics

abstract:
  In these lectures I briefly review the Higgs mechanism of spontaneous
symmetry breaking and focus on the most relevant aspects of the phenomenology
of the Standard Model and of the Minimal Supersymmetric Standard Model Higgs
bosons at both hadron and lepton colliders. Some emphasis is put on the
perturbative calculation of both Higgs boson branching ratios and production
cross sections, including the most important radiative corrections.


title:
A_4 flavour symmetry breaking scheme for understanding quark and
  neutrino mixing angles

abstract:
  We propose a spontaneous A_4 flavour symmetry breaking scheme to understand
the observed pattern of quark and neutrino mixing. The fermion mass eigenvalues
are arbitrary, but the mixing angles are constrained in such a way that the
overall patterns are explained while also leaving sufficient freedom to fit the
detailed features of the observed values, including CP violating phases. The
scheme realises the proposal of Low and Volkas to generate zero quark mixing
and tribimaximal neutrino mixing at tree-level, with deviations from both
arising from small corrections after spontaneous A_4 breaking. In the neutrino
sector, the breaking is A_4 --> Z_2, while in the quark and charged-lepton
sectors it is A_4 --> Z_3 = C_3. The full theory has A_4 completely broken, but
the two different unbroken subgroups in the two sectors force the dominant
mixing patterns to be as stated above. Radiative effects within each sector are
shown to deviate neutrino mixing from tribimaximal, while maintaining zero
quark mixing. Interactions between the two sectors -- "cross-talk" -- induce
nonzero quark mixing, and additional deviation from tribimaximal neutrino
mixing. We discuss the vacuum alignment challenge the scenario faces, and
suggest three generic ways to approach the problem. We follow up one of those
ways by sketching how an explicit model realising the symmetry breaking
structure may be constructed.


title: A precise determination of $B_K$ in quenched QCD

abstract:
  The $B_K$ parameter is computed in quenched lattice QCD with Wilson twisted
mass fermions. Two variants of tmQCD are used; in both of them the relevant
$\Delta S = 2$ four-fermion operator is renormalised multiplicatively. The
renormalisation adopted is non-perturbative, with a Schroedinger functional
renormalisation condition. Renormalisation group running is also
non-perturbative, up to very high energy scales. In one of the two tmQCD
frameworks the computations have been performed at the physical $K$-meson mass,
thus eliminating the need of mass extrapolations. Simulations have been
performed at several lattice spacings and the continuum limit was reached by
combining results from both tmQCD regularisations. Finite volume effects have
been partially checked and turned out to be small. Exploratory studies have
also been performed with non-degenerate valence flavours. The final result for
the RGI bag parameter, with all sources of uncertainty (except quenching) under
control, is $\hat B_K =0.789 \pm 0.046$.


title:
New contribution to dimension five operators on proton decay in anomaly
  mediation scenario

abstract:
  In supergravity, effective superpotential relevant to dimension five
operators on proton decay processes also leads to supersymmetry breaking terms
among sfermions, dimension four operators. These dimension four operators
induce the dimension five operators through 1-loop diagrams dressed by
gauginos. We find that, in a class of models with the anomaly mediation, the
1-loop contributions can be comparable to those at the tree level. Therefore,
such operators have a great impact on proton decay rate. Depending on a
universal phase of gaugino masses and soft mass spectrum, the proton decay rate
can be enhanced or suppressed.


title: Detecting Higgs Bosons with Muons at Hadron Colliders

abstract:
  We investigate the prospects for the discovery of neutral Higgs bosons with a
pair of muons by direct searches at the CERN Large Hadron Collider (LHC) as
well as by indirect searches in the rare decay $B_s \to \mu^+\mu^-$ at the
Fermilab Tevatron and the LHC. Promising results are found for the minimal
supersymmetric standard model, the minimal supergravity (mSUGRA) model, and
supergravity models with non-universal Higgs masses (NUHM SUGRA). For
$\tan\beta \simeq 50$, we find that (i) the contours for a branching fraction
of $B(B_s \to \mu^+\mu^-) = 1 \times 10^{-8}$ in the parameter space are very
close to the $5\sigma$ contours for $pp \to b\phi^0 \to b\mu^+\mu^- +X, \phi^0
= h^0, H^0, A^0$ at the LHC with an integrated luminosity ($L$) of 30
fb$^{-1}$, (ii) the regions covered by $B(B_s \to \mu^+\mu^-) \ge 5\times
10^{-9}$ and the discovery region for $b\phi^0 \to b\mu^+\mu^-$ with 300
fb$^{-1}$ are complementary in the mSUGRA parameter space, (iii) in NUHM SUGRA
models, a discovery of $B(B_s \to \mu^+\mu^-) \simeq 5\times 10^{-9}$ at the
LHC will cover regions of the parameter space beyond the direct search for
$b\phi^0 \to b\mu^+\mu^-$ with $L = 300$ fb$^{-1}$.


title: Magnetic Moments of Dirac Neutrinos

abstract:
  The existence of a neutrino magnetic moment implies contributions to the
neutrino mass via radiative corrections. We derive model-independent
"naturalness" upper bounds on the magnetic moments of Dirac neutrinos,
generated by physics above the electroweak scale. The neutrino mass receives a
contribution from higher order operators, which are renormalized by operators
responsible for the neutrino magnetic moment. This contribution can be
calculated in a model independent way. In the absence of fine-tuning, we find
that current neutrino mass limits imply that $|\mu_\nu| < 10^{-14}$ Bohr
magnetons. This bound is several orders of magnitude stronger than those
obtained from solar and reactor neutrino data and astrophysical observations.


title:
Indications for the new unitarity regime in the extensive air showers
  measurements

abstract:
  We note that the new unitarity regime when scattering amplitude goes beyond
the black disc limit (antishadowing) could help in the explanation of the
regularities such as knee in the energy spectrum, existence of penetrating and
long-flying particles and other features observed in the measurements of the
extensive air showers which originate from cosmic particles interactions with
the atmosphere.


title:
Phases of a fermionic model with chiral condensates and Cooper pairs in
  1+1 dimensions

abstract:
  We study the phase structure of a 4-fermi model with three bare coupling
constants, which potentially has three types of bound states. This model is a
generalization of the model discussed previously by A. Chodos et al. [Phys.
Rev. D 61, 045011 (2000)], which contained both chiral condensates and Cooper
pairs. For this generalization we find that there are two independent
renormalized coupling constants which determine the phase structure at finite
density and temperature. We find that the vacuum can be in one of three
distinct phases depending on the value of these two renormalized coupling
constants.


title: Finite-size effects on the hadron-quark mixed phase

abstract:
  We show that the hadron-quark mixed phase is restricted to narrow range of
baryon chemical potential by the charge screening effect.
  Accordingly the mixed phase expected in hadron-quark hybrid stars should be
narrow. Although the screening would not have large effect in bulk properties
of the star such as mass or radius, it change the internal structure of the
star very much, which may be tested by the cooling curve, glitch phenomena or
gravitational waves.


title:
Dynamical Chiral Symmetry Breaking, Color Superconductivity, and
  Bose-Einstein Condensation in an $SU(N_{c})\times U(N_{f})_{L}\times
  U(N_{f})_{R}$-invariant Supersymmetric Nambu$-$Jona-Lasinio Model

abstract:
  We investigate the phenomena of the dynamical chiral symmetry breaking
(DCSB), color superconductivity (CSC), and Bose-Einstein condensation (BEC) in
an ${\cal N}=1$ four-dimensional generalized SUSY Nambu$-$Jona-Lasinio model at
finite temperature and density. Both the ${\cal N}=1$ four-dimensional and
${\cal N}=2$ three-dimensional cases are considered. The ${\cal N}=2$
three-dimensional theory is obtained by a simple dimensional reduction scheme
of the four-dimensional counterpart. In order to realize the DCSB and BCS-type
CSC in this model, we introduce a SUSY soft mass term. After adopting the
method of SUSY auxiliary fields with the Fierz transformation in color and
flavor spaces, we discuss several possible breaking schemes of the global
symmetries of the model. The integrations of the auxiliary fields of composites
in the effective potential are performed by using the steepest descent
approximation. The roles of both the boson and fermion sectors in the BEC, DCSB
and CSC are examined by the quasiparticle excitation spectra and the gap
equations. The physical properties of the DCSB and the CSC are studied in
detail, while that of the BEC is beyond scope of this paper. It is found that
the BEC, DCSB and CSC can coexist under a condition of model parameters.


title:
On the chiral perturbation theory for two-flavor two-color QCD at finite
  chemical potential

abstract:
  We construct the chiral perturbation theory for two-color QCD with two quark
flavors as an effective theory on the SO(6)/SO(5) coset space. This formulation
turns out to be particularly useful for extracting the physical content of the
theory when finite baryon and isospin chemical potentials are introduced, and
Bose--Einstein condensation sets on.


title:
Measuring the deviation from maximal mixing of atmospheric muon
  neutrinos at INO

abstract:
  Neutrino factfile and $D \equiv 1/2 - sin^2 \theta_{23}$ $\nu_mu$,
$\bar\nu_mu$ survival probabilities and binned up-down asymmetries Error
analysis and sensitivity to $D$


title:
HERA and the LHC - A workshop on the implications of HERA for LHC
  physics: Proceedings - Part A

abstract:
  The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since
its start-up in 1992, and recently moved into a high-luminosity operation mode,
with upgraded detectors, aiming to increase the total integrated luminosity per
experiment to more than 500 pb$^{-1}$. HERA has been a machine of excellence
for the study of QCD and the structure of the proton. The Large Hadron Collider
(LHC), which will collide protons with a centre-of-mass energy of 14 TeV, will
be completed at CERN in 2007. The main mission of the LHC is to discover and
study the mechanisms of electroweak symmetry breaking, possibly via the
discovery of the Higgs particle, and search for new physics in the TeV energy
scale, such as supersymmetry or extra dimensions. Besides these goals, the LHC
will also make a substantial number of precision measurements and will offer a
new regime to study the strong force via perturbative QCD processes and
diffraction. For the full LHC physics programme a good understanding of QCD
phenomena and the structure function of the proton is essential. Therefore, in
March 2004, a one-year-long workshop started to study the implications of HERA
on LHC physics. This included proposing new measurements to be made at HERA,
extracting the maximum information from the available data, and
developing/improving the theoretical and experimental tools. This report
summarizes the results achieved during this workshop.


title:
HERA and the LHC - A workshop on the implications of HERA for LHC
  physics: Proceedings - Part B


title: PBH and DM from cosmic necklaces

abstract:
  Cosmic strings in the brane Universe have recently gained a great interest. I
think the most interesting story is that future cosmological observations
distinguish them from the conventional cosmic strings. If the strings are the
higher-dimensional objects that can (at least initially) move along the
compactified space, and finally settle down to (quasi-)degenerated vacua in the
compactified space, then kinks should appear on the strings, which interpolate
between the degenerated vacua. These kinks look like ``beads'' on the strings,
which means that the strings turn into necklaces. Moreover, in the case that
the compact manifold is not simply connected, the string loop that winds around
a non-trivial circle is stable due to the topological reason. Since the
existence of degenerated vacua and a non-trivial circle is the common feature
of the brane models, it is important to study cosmological constraints on the
cosmic necklaces and their stable winding states in the brane Universe.


title: Classification of 1D and 2D Orbifolds

abstract:
  We present a complete classification of all 1D and 2D orbifold
compactifications. There exist 2 one-dimensional and 17 two-dimensional
orbifolds. The classification includes orbifolds such as S^1/Z_2 or T^2/Z_n, as
well as less familiar ones like T^2/D_n or the Mobius strip. We derive the
explicit form of the basis functions and prove their orthonormality and
completeness. Our study is based on the classification of space groups, which
is well-known from crystallography. We define these groups in a novel, purely
algebraic way. That enables us to determine all possible parities that can be
defined on the orbifolds. We discuss field theories on T^2/Z_n with brane
kinetic terms, and describe the derivation of their mass eigenstate bases.


title: Particle Physics Approach to Dark Matter

abstract:
  We review the main proposals of particle physics for the composition of the
cold dark matter in the universe. Strong axion contribution to cold dark matter
is not favored if the Peccei-Quinn field emerges with non-zero value at the end
of inflation and the inflationary scale is superheavy since, under these
circumstances, it leads to unacceptably large isocurvature perturbations. The
lightest neutralino is the most popular candidate constituent of cold dark
matter. Its relic abundance in the constrained minimal supersymmetric standard
model can be reduced to acceptable values by pole annihilation of neutralinos
or neutralino-stau coannihilation. Axinos can also contribute to cold dark
matter provided that the reheat temperature is adequately low. Gravitinos can
constitute the cold dark matter only in limited regions of the parameter space.
We present a supersymmetric grand unified model leading to violation of Yukawa
unification and, thus, allowing an acceptable b-quark mass within the
constrained minimal supersymmetric standard model with mu>0. The model
possesses a wide range of parameters consistent with the data on the cold dark
matter abundance as well as other phenomenological constraints. Also, it leads
to a new version of shifted hybrid inflation.


title:
Study on Decays of $D_{sJ}^{*}(2317)$ and $D_{sJ}(2460)$ in terms of the
  CQM Model

abstract:
  Based on the assumption that $D_{sJ}^{*}(2317)$ and $D_{sJ}(2460)$ are the
$(0^+, 1^+)$ chiral partners of $D_{s}$ and $D^*_s$, we evaluate the strong
pionic and radiative decays of $D_{sJ}^{*}(2317)$ and $D_{sJ}(2460)$ in the
Constituent Quark Meson (CQM) model. Our numerical results of the relative
ratios of the decay widths are reasonably consistent with data.


title: Split Two-Higgs-Doublet Model and Neutrino Condensation

abstract:
  We split the two-Higgs-doublet model by assuming very different vevs for the
two doublets: the vev is at weak scale (174 GeV) for the doublet \Phi_1 and at
neutrino-mass scale (10^{-2} \sim 10^{-3} eV) for the doublet \Phi_2. \Phi_1 is
responsible for giving masses to all fermions except neutrinos; while \Phi_2 is
responsible for giving neutrino masses through its tiny vev without introducing
see-saw mechanism. Among the predicted five physical scalars H, h, A^0 and
H^{\pm}, the CP-even scalar h is as light as 10^{-2} \sim 10^{-3}eV while
others are at weak scale. We identify h as the cosmic dark energy field and the
other CP-even scalar H as the Standard Model Higgs boson; while the CP-odd A^0
and the charged H^{\pm} are the exotic scalars to be discovered at future
colliders. Also we demonstrate a possible dynamical origin for the doublet
\Phi_2 from neutrino condensation caused by some unknown dynamics.


title: Polarizations of two vector mesons in B decays

abstract:
  Inspired by the small longitudinal polarizations (LPs) of $B\to K^* \phi$
decays observed by BELLE and BABAR, we revise the theoretical uncertainties of
perturbative QCD approach for determining hard scales of B decays, we find that
the LPs of $B\to K^* \phi$ could approach to 60% while the branching ratios
(BRs) could be around $9\times 10^{-6}$. In addition, we also study the BRs and
polarization fractions of $B\to \rho (\omega) \rho (\omega)$ and $B\to \rho
(\omega) K^*$ decays. For those tree dominant and color-allowed processes in
$B\to \rho (\omega) \rho (\omega)$ decays, we get that the BRs of $(\rho^{+}
\rho^{-}, \rho^{0} \rho^{+}, \omega \rho^{+})$ are $(23.06, 11.99, 14.78)\times
10^{-6}$ while their LPs are close to unity. Interestingly, due to significant
tree contributions, we find that the BR(LP) of $\rho^{-} K^{*+}$ could be
around $10.13 \times 10^{-6}(60%)$; and due to the tree and electroweak
penguin, the BR(LP) of $\omega K^{*+}$ could be around $5.67 \times
10^{-6}(61%)$.


title: Recent developments in the modeling of heavy quarkonia

abstract:
  We examine the spectra and radiative decays of the cc-bar and bb-bar systems
using a model which incorporates the complete one-loop spin-dependent
perturbative QCD short distance potential, a linear confining term including
(spin-dependent) relativistic corrections to order v^2/c^2, and a fully
relativistic treatment of the kinetic energy. We compare the predictions of
this model to experiments, including states and decays recently measured at
Belle, BaBar, CLEO and CDF.


title:
A new parton shower algorithm: Shower evolution, matching at leading and
  next-to-leading order level

abstract:
  In this paper we outline a new parton shower algorithm based on the
Catani-Seymour dipole factorization. Our motivation is to have an algorithm
which can naturally cooperate with the NLO calculations.


title: Describing the Baryon Spectrum with 1/N_c QCD

abstract:
  This talk outlines recent advances using QCD in the 1/N_c limit aimed at
understanding baryon scattering processes and their embedded short-lived baryon
resonances. In this presentation we emphasize developing qualitative physical
insight over presenting results of detailed calculations.


title: Proton stability in grand unified theories, in strings, and in branes

abstract:
  A broad overview of the current status of proton stability in unified models
of particle interactions is given which includes non - supersymmetric
unification, SUSY and SUGRA unified models, unification based on extra
dimensions, and string-M-theory models. The extra dimensional unification
includes 5D and 6D and universal extra dimensional (UED) models, and models
based on warped geometry. Proton stability in a wide array of string theory and
M theory models is reviewed. These include Calabi-Yau models, grand unified
models with Kac-Moody levels $k>1$, a new class of heterotic string models,
models based on intersecting D branes, and string landscape models. The
destabilizing effect of quantum gravity on the proton is discussed. The
possibility of testing grand unified models, models based on extra dimensions
and string-M-theory models via their distinctive modes is investigated. The
proposed next generation proton decay experiments, HyperK, UNO, MEMPHYS,
ICARUS, LANNDD (DUSEL), and LENA would shed significant light on the nature of
unification complementary to the physics at the LHC. Mathematical tools for the
computation of proton lifetime are given in the appendices. Prospects for the
future are discussed.


title: Cold Atom Clock Test of Lorentz Invariance in the Matter Sector

abstract:
  We report on a new experiment that tests for a violation of Lorentz
invariance (LI), by searching for a dependence of atomic transition frequencies
on the orientation of the spin of the involved states (Hughes-Drever type
experiment). The atomic frequencies are measured using a laser cooled
$^{133}$Cs atomic fountain clock, operating on a particular combination of
Zeeman substates. We analyze the results within the framework of the Lorentz
violating standard model extension (SME), where our experiment is sensitive to
a largely unexplored region of the SME parameter space, corresponding to first
measurements of four proton parameters and improvements by 11 and 13 orders of
magnitude on the determination of four others. In spite of the attained
uncertainties, and of having extended the search into a new region of the SME,
we still find no indication of LI violation.


title: Scalar form-factor of the proton with light-cone QCD sum rules

abstract:
  In this article, we calculate the scalar form-factor of the proton in the
framework of the light-cone QCD sum rules approach with the three valence quark
light-cone distribution amplitudes up to twist-6, and observe the scalar
form-factor $\sigma(t=-Q^2)$ at intermediate and large momentum transfers $Q^2>
2GeV^2$ has significant contributions from the end-point (or soft) terms. The
numerical values for the $\sigma(t=-Q^2)$ are compatible with the calculations
from the chiral quark model and lattice QCD at the region $Q^2>2GeV^2$.


title: Coupling of \bar K*N to the Lambda(1520)

abstract:
  We study the coupling of the Lambda(1520)= Lambda* resonance to the \bar K*
vector meson and nucleon. This coupling is not directly measured from the
resonance decay, but is expected to be important in hyperon production
reactions, in particular for the exotic Theta+ production. We compute the
coupling in two different schemes, one in the chiral unitary model where the
Lambda* is dominated by the quasibound state of mesons and baryons, and the
other in the quark model where the resonance is a p-wave excitation in the
three valence quarks. Although it is possible to construct both models such
that they reproduce the \bar K N and pi Sigma decays, there is a significant
difference between the Lambda* \bar K* N couplings in the two models. In the
chiral unitary model $|g_{\Lambda^*\bar{K}^* N}| \sim 1.5$, while in the quark
model $|g_{\Lambda^*\bar{K}^* N}| \sim 10$. The difference of the results stems
from the different structure of the Lambda* in both models, and hence, an
experimental determination of this coupling would shed light on the nature of
the resonance.


title: Single and pair production of heavy leptons in $E_6$ model

abstract:
  We investigate the single and pair production of new heavy leptons via string
inspired $E_{6}$ model at future linear colliders. Signal and corresponding
backgrounds for these leptons are studied. We have found that single production
of heavy leptons is more relevant than that of pair production, as expected.
For a maximal mixing value of 0.1, the upper mass limits of 2750 GeV in the
single case and 1250 GeV in the pair production case are obtained at
$\sqrt{s}=3$ TeV collider option.


title: Note on helicity amplitudes in D to V semileptonic decays

abstract:
  Motivated by the recent extraction of the helicity amplitudes for the D+ ->
K*0bar mu+ nu decay, done by the FOCUS collaboration, we determine helicity
amplitudes for the D+ -> K*0bar l nu, D+ -> rho0 l nu and Ds -> phi l nu
semileptonic decays using the knowledge of the relevant form factors. The
vector and axial form factors for D -> V l nu decays are parameterized by
including contributions of charm meson resonances and using the HQET and SCET
limits. In the case that the vector form factor receives contributions from two
poles while axial form factors are dominated by a single pole for D+ -> K*0bar
l nu, we obtain better agreement with the experimental result then when all of
them are dominated by single poles.


title: TeV-Scale Black Hole Lifetimes in Extra-Dimensional Lovelock Gravity

abstract:
  We examine the mass loss rates and lifetimes of TeV-scale extra dimensional
black holes (BH) in ADD-like models with Lovelock higher-curvature terms
present in the action. In particular we focus on the predicted differences
between the canonical and microcanonical ensemble statistical mechanics
descriptions of the Hawking radiation that results in the decay of these BH. In
even numbers of extra dimensions the employment of the microcanonical approach
is shown to generally lead to a significant increase in the BH lifetime as in
case of the Einstein-Hilbert action. For odd numbers of extra dimensions,
stable BH remnants occur when employing either description provided the highest
order allowed Lovelock invariant is present. However, in this case, the time
dependence of the mass loss rates obtained employing the two approaches will be
different. These effects are in principle measurable at future colliders.


title: Advantage of U+U over Au+Au collisions at constant beam energy

abstract:
  Collisions of deformed uranium nuclei are studied in a Monte-Carlo Glauber
model. For U+U at zero impact parameter (b=0) in the most favorable orientation
(tip-to-tip), the transverse particle density (charged-particle rapidity
density per weighted transverse area of the initial participant zone) increases
by about 35% compared to Au+Au at b=0. To estimate the advantage of U+U over
Au+Au in the context of real experiments at the Relativistic Heavy Ion
Collider, we examine the effect of a range of centrality cuts on the event
sample. In terms of the transverse particle density, the predicted advantage of
U+U is about 16%.


title:
Energy scale independence of Koide's relation for quark and lepton
  masses

abstract:
  Koide's mass relation of charged leptons has been extended to quarks and
neutrinos, and we prove here that this relation is independent of energy scale
in a huge energy range from $1 {GeV}$ to $2\times10^{16} {GeV}$. By using the
parameters $k_u$, $k_d$ and $k_{\nu}$ to describe the deviations of quarks and
neutrinos from the exact Koide's relation, we also check the quark-lepton
complementarity of masses such as $k_{l}+k_{d} \approx k_{\nu}+k_{u} \approx
2$, and show that it is also independent (or insensitive) of energy scale.


title:
Estimate of the Hadronic Production of the Doubly Charmed Baryon
  $\Xi_{cc}$ under GM-VFN Scheme

abstract:
  Hadronic production of the doubly charmed baryon $\Xi_{cc}$ ($\Xi^{++}_{cc}$
and $\Xi^{+}_{cc}$) is investigated under the general-mass
variable-flavor-number (GM-VFN) scheme. The gluon-gluon fusion mechanism and
the intrinsic charm mechanisms, i.e. via the sub-processes
$g+g\to(cc)[^3S_1]_{\bar 3}+\bar{c}+\bar{c}$,
$g+g\to(cc)[^1S_0]_6+\bar{c}+\bar{c}$; $g+c\to (cc)[^3S_1]_{\bar 3}+\bar{c}$,
$g+c\to (cc)[^1S_0]_6+\bar{c}$ and $c+c\to (cc)[^3S_1]_{\bar 3}+g$, $c+c\to
(cc)[^1S_0]_6+g$, are taken into account in the investigation, where
$(cc)[^3S_1]_{\bar 3}$ (in color {\bf $\bar 3$}) and $(cc)[^1S_0]_6$ (in color
{\bf 6}) are two possible $S$-wave configurations of the doubly charmed diquark
pair $(cc)$ inside the baryon $\Xi_{cc}$. Numerical results for the production
at hadornic colliders LHC and TEVATRON show that both the contributions from
the doubly charmed diquark pairs $(cc)[^1S_0]_6$ and $(cc)[^3S_1]_{\bar 3}$ are
sizable with the assumption that the two NRQCD matrix elements are equal, and
the total contributions from the `intrinsic' charm mechanisms are bigger than
those of the gluon-gluon fusion mechanism. For the production in the region of
small transverse-momentum $p_t$, the intrinsic mechanisms are dominant over the
gluon-gluon fusion mechanism and they can raise the theoretical prediction of
the $\Xi_{cc}$ by almost one order.


title:
The importance of inelastic channels in eliminating continuum
  ambiguities in pion-nucleon partial wave analyses

abstract:
  Single channel, single energy partial wave analyses (SE_PWA) are from the
first principles non-unique in the inelastic region if only data from elastic
channels are used, so we in details discuss mechanisms how the problem is
eliminated in pion-nucleon scattering. The "continuum ambiguities" puzzle has
been extensively discussed since early 1970es, and two major mechanisms for
solving the problem have been suggested: either to ensure the continuity of
Argand diagrams by imposing the T-matrix t-channel analyticity
(Karlsruhe-Helsinki, VPI/GWU) or to restore the unitarity loss in the
kinematical regime where the inelastic channels are successively opened by
replacing the standard single channel PWA by the coupled channel formalism
(CMB, Zagreb, Kent, Pittsburgh/ANL, Giessen). In both approaches the
insufficiency of the single channel data is eliminated by introducing
additional constraints using the data from other channels. The importance and
physical meaning of the second approach is presented in details, and the
significance of inelastic channels for the uniqueness of the partial wave
analysis is discussed. The outline of the procedure for utilizing the coupled
channel formalism to perform the search for the minimal number/full set of
T-matrix poles in the complex energy plane, which connect the quark model
predictions to experimental reality, is proposed. The appearance of new,
additional resonances unneeded in the sole elastic channel is demonstrated.


title: $B \to K^* \ell^+\ell^-$ in soft-collinear effective theory

abstract:
  We study the rare B decay $B \to K^* \ell^+ \ell^-$ using soft-collinear
effective theory (SCET). At leading power in $1/m_b$, a factorization formula
is obtained valid to all orders in $\alpha_s$. For phenomenological
application, we calculate the decay amplitude including order $\alpha_s$
corrections, and resum the logarithms by evolving the matching coefficients
from the hard scale ${\cal O}(m_b)$ down to the scale $\sqrt{m_b \Lambda_h}$.
The branching ratio for $B \to K^* \ell^+ \ell^-$ is uncertain due to the
imprecise knowledge of the soft form factors $\zeta_\perp (q^2)$ and
$\zeta_\parallel (q^2)$. Constraining the soft form factor $\zeta_\perp
(q^2=0)$ from data on $B \to K^* \gamma$ yields $\zeta_\perp (q^2=0)=0.32 \pm
0.02$. Using this input, together with the light-cone sum rules to determine
the $q^2$dependence of $\zeta_\perp (q^2)$ and the other soft form factor
$\zeta_\parallel (q^2)$, we eastimate the partially integrated branching ratio
in the range $1~{GeV}^2 \le q^2 \le 7~{GeV}^2$ to be $(2.92^{+0.67}_{-0.61})
\times 10^{-7}$. We discuss how to reduce the form factor related uncertainty
by combining data on $B \to \rho (\to \pi \pi) \ell \nu_\ell$ and $B\to K^*
(\to K\pi) \ell^+\ell^-$. The forward-backward asymmetry is less sensitive to
the input parameters. In particular, for the zero-point of the forward backward
asymmetry in the standard model, we get $q_0^2=(4.07^{+0.13}_{-0.12})~{GeV}^2$.
The scale dependence of $q_0^2$ is discussed in detail.


title:
The importance of piN → K Lambda process for the pole structure of
  the P11 partial wave T-matrix in the coupled channel pion-nucleon partial
  wave analysis

abstract:
  The pole structure of the P11 pion-nucleon partial wave is examined with the
emphasis on the 1700 MeV energy domain. The mechanism of eliminating continuum
ambiguities in pion-nucleon partial wave analyses by using the coupled channel
formalism, presented elsewhere for the piN -> etaN channel, is applied for the
piN -> K Lambda channel, with the aim to clarify the issue whether physical
reality requires none (VPI/GWU), one (KH80, CMB, Kent, Pittsburgh/ANL,
Giessen), or possibly two (Zagreb) poles of the partial wave T-matrix in the
1700 MeV range. The role of second inelastic channel for resolving the dilemma
is demonstrated. It is pointed out that the experiments for the piN -> K Lambda
and piN -> K Sigma channel, extremely important for the 1700 MeV range, are old
and inconclusive so an urgent need for remeasuring that channel is stressed.


title:
Radiatively Generated Maximal Mixing Scenario for the Higgs Mass and the
  Least Fine Tuned Minimal Supersymmetric Standard Model

abstract:
  We argue that given the experimental constraints on the Higgs mass the least
fine tuned parameter space of minimal supersymmetric standard model is with
negative stop masses squared at the grand unification scale. While stop mass
squared is typically driven to positive values at the weak scale, the
contribution to the Higgs mass squared parameter from the running can be
arbitrarily small, which reduces fine tuning of electroweak symmetry breaking.
At the same time the stop mixing is necessarily enhanced and the maximal mixing
scenario for the Higgs mass can be generated radiatively even when starting
with negligible mixing at the unification scale. This highly alleviates
constraints on possible models for supersymmetry breaking in which fine tuning
is absent.


title:
Discrete Symmetries on the Light Front and a General Relation Connecting
  Nucleon Electric Dipole and Anomalous Magnetic Moments

abstract:
  We consider the electric dipole form factor, F_3(q^2), as well as the Dirac
and Pauli form factors, F_1(q^2) and F_2(q^2), of the nucleon in the
light-front formalism. We derive an exact formula for F_3(q^2) to complement
those known for F_1(q^2) and F_2(q^2). We derive the light-front representation
of the discrete symmetry transformations and show that time-reversal- and
parity-odd effects are captured by phases in the light-front wave functions. We
thus determine that the contributions to F_2(q^2) and F_3(q^2), Fock state by
Fock state, are related, independent of the fundamental mechanism through which
CP violation is generated. Our relation is not specific to the nucleon, but,
rather, is true of spin-1/2 systems in general, be they lepton or baryon. The
empirical values of the anomalous magnetic moments, in concert with empirical
bounds on the associated electric dipole moments, can better constrain theories
of CP violation. In particular, we find that the neutron and proton electric
dipole moments echo the isospin structure of the anomalous magnetic moments,
kappa^n ~ - kappa^p.


title: An LHC Run Plan - The First Inverse Femtobarn

abstract:
  The LHC will open up a new regime in high energy physics. The resultant
greatly expanded discovery reach makes it incumbant on LHC experimenters to be
prepared for discoveries, even in the very early days. To that end a variety of
Standard Model processes must be validated in any LHC experiment in order to
establish that the responses of the detector are well understood.


title: The flavor of product-group GUTs

abstract:
  The doublet-triplet splitting problem can be simply solved in product-group
GUT models, using a global symmetry that distinguishes the doublets from the
triplets. Apart from giving the required mass hierarchy, this ``triplet
symmetry'' can also forbid some of the triplet couplings to matter. We point
out that, since this symmetry is typically generation-dependent, it gives rise
to non-trivial flavor structure. Furthermore, because flavor symmetries cannot
be exact, the triplet-matter couplings are not forbidden then but only
suppressed. We construct models in which the triplet symmetry gives acceptable
proton decay rate and fermion masses. In some of the models, the prediction m_b
~ m_\tau is retained, while the similar relation for the first generation is
corrected. Finally, all this can be accomplished with triplets somewhat below
the GUT scale, supplying the right correction for the standard model gauge
couplings to unify precisely.


title: Minimal Trinification

abstract:
  We study the trinified model, SU(3)_C x SU(3)_L x SU(3)_R x Z_3, with the
minimal Higgs sector required for symmetry breaking. There are five Higgs
doublets, and gauge-coupling unification results if all five are at the weak
scale, without supersymmetry. The radiative see-saw mechanism yields sub-eV
neutrino masses, without the need for intermediate scales, additional Higgs
fields, or higher-dimensional operators. The proton lifetime is above the
experimental limits, with the decay modes p -> \bar\nu K^+ and p -> \mu^+ K^0
potentially observable. We also consider supersymmetric versions of the model,
with one or two Higgs doublets at the weak scale. The radiative see-saw
mechanism fails with weak-scale supersymmetry due to the nonrenormalization of
the superpotential, but operates in the split-SUSY scenario.


title: The Well-Tempered Neutralino

abstract:
  The dark-matter prediction is usually considered as one of the successes of
low-energy supersymmetry. We argue that, after LEP constraints are taken into
account, the correct prediction for the dark-matter density, at a quantitative
level, is no longer a natural consequence of supersymmetry, but it requires
special relations among parameters, highly sensitive to small variations. This
is analogous to the problem of electroweak-symmetry breaking, where the correct
value of the Z mass is obtained only with a certain degree of fine tuning. In
the general parameter space of low-energy supersymmetry, one of the most
plausible solution to reproduce the correct value of the dark-matter density is
the well-tempered neutralino, which corresponds to the boundary between a pure
Bino and a pure Higgsino or Wino. We study the properties of well-tempered
neutralinos and we propose a simple limit of split supersymmetry that realizes
this situation.


title: High Momentum Dilepton Production from Jets in a Quark Gluon Plasma

abstract:
  We discuss the emission of high momentum lepton pairs in central Au+Au
collisions at RHIC ($\sqrt{s_{NN}}=$200 GeV) and Pb+Pb collisions at the LHC
($\sqrt{s_{NN}}=$5500 GeV). Yields of dileptons produced through interactions
of jets with thermal partons have been calculated, with next-to-leading order
corrections through hard thermal loops (HTL) resummation. They are compared to
thermal dilepton emission and the Drell-Yan process. A complete leading order
treatment of jet energy loss has been included. Jet-plasma interactions are
found to dominate over thermal dilepton emission for all values of the
invariant mass $M$. Drell-Yan is the dominant source of high momentum lepton
pairs for $M >$ 3 GeV at RHIC, after the background from heavy quark decays is
subtracted. At LHC, the range $M<7$ GeV is dominated by jet-plasma
interactions. Effects from jet energy loss on jet-plasma interactions turn out
to be weak, but non-negligible, reducing the yield of low-mass dileptons by
about 30%.


title: Light and heavy multiquark spectroscopy

abstract:
  The dynamics of multiquark binding is revisited in the light of the recent
experimental results. It is emphasized that some configurations mixing light
and heavy flavours are among the most favourable for stable or metastable
multiquarks. The nuclear-physics type of approach predicting the so-called
hadron-hadron molecules is compared to direct studies in terms of quark
interaction.


title:
QCD Multipole Expansion and Hadronic Transitions in Heavy Quarkonium
  Systems

abstract:
  We review the developments of QCD multipole expansion and its applications to
hadronic transitions and some radiative decays of heavy quarkonia. Theoretical
predictions are compsred with updated experimental results.