title: Target mass effects in deep-inelastic scattering on the deuteron

abstract:
  We calculate the effects of the target mass on deep-inelastic electron
scattering on targets of spin one such as the deuteron, focusing on the novel
structure functions that enter. It is important to understand these effects
given the recent HERMES measurements of the $b_1(x,Q^2)$ structure function of
the deuteron. We also derive the spin-one analogues of the Wandzura-Wilczek
relations and discuss possible calculations in lattice QCD.


title: Understanding Light: Why we need a terascale photon collider

abstract:
  We do not understand light. I argue that a terascale photon collider is
necessary to determine the structure of the photon at 100 GeV. Uncertainties in
photon parton distribution functions lead to cross section predictions that
vary by a factor of 5. This limits our ability to predict how well we can
perform precision measurements, e.g., extracting the width of Higgs into two
photons. These uncertainties will only be resolved by measuring the gluonic
structure of the photon in situ.


title:
Double Higgs Production at the LHC as a robust test of Little Higgs
  models

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


title: The gluon-fusion uncertainty in Higgs coupling extractions

abstract:
  We point out that the QCD corrections to the gluon-fusion Higgs boson
production cross section at the LHC are very similar to the corrections to the
Higgs decay rate into two gluons. Consequently, the ratio of these two
quantities has a theoretical uncertainty smaller than the uncertainty in the
cross section alone by a factor of two. We note that since this ratio is the
theoretical input to analyses of Higgs coupling extractions at the LHC, the
reduced uncertainty should be used; in previous studies, the full cross section
uncertainty was employed.


title:
Systematic Investigation of Possibilities for New Physics Effects in b
  --> s Penguin Processes

abstract:
  Although recent experimental results in b-->s penguin process seem to be
roughly consistent with the standard model predictions, there may be still
large possibilities of new physics hiding in this processes. Therefore, here we
investigate systematically the potential new physics effects that may appear in
time-dependent CP asymmetries of B --> phi K^0, B--> eta^\prime K^0 and B-->
K^0 \pi^0 decay modes, by classifying the cases for the values of the
mixing-induced indirect CP asymmetries, S_{phi K^0}, S_{eta^\prime K^0}, S_{K^0
pi^0} which are compared to S_{J/psi K^0}. We also show that several B_s decay
modes may help to resolve the ambiguities in such an analysis. Through
combining analysis with the time-dependent CP asymmetries of B_s decay modes
such as B_s --> phi eta^\prime, B_s--> eta^\prime pi^0 and B_s --> K^0
bar{K}^0, we can determine where the new CP phases precisely come from.


title: The Cuba Library

abstract:
  Concepts and implementation of the Cuba library for multidimensional
numerical integration are elucidated.


title: Probing the radion-Higgs mixing at photon colliders

abstract:
  In the Randall-Sundrum model, the radion-Higgs mixing is weakly suppressed by
the effective electroweak scale. A novel feature of the gravity-scalar mixing
would be a sizable three-point vertex of $\grav$-$h$-$\phi$. We explore the
potential of photon colliders, achieved by the laser backscattering technique,
in probing the radion-Higgs mixing via the associated production of the radion
with the Higgs boson. The advantage of photon colliders is the capability of
adjusting the polarization of the incoming photons such that the signal of the
spin-2 graviton exchange can be largely enhanced. The enhancement factor is
shown to be about 5, except for small-$\xi$ region. We also study the
corresponding backgrounds step-by-step in detail.


title: Hot QCD, k-strings and the adjoint monopole gas model

abstract:
  When the magnetic sector of hot QCD, 3D SU(N) Yang-Mills theory, is described
as a dilute gas of non-Abelian monopoles in the adjoint representation of the
magnetic group, Wilson loops of N-ality k are known to obey a periodic k(N-k)
law. Lattice simulations have confirmed this prediction to a few percent for
N=4 and 6. We describe in detail how the magnetic flux of the monopoles
produces different area laws for spatial Wilson k-loops. A simple physical
argument is presented, why the predicted and observed Casimir scaling is
allowed in the large-N limit by usual power-counting arguments. The same
scaling is also known to hold in two-loop perturbation theory for the spatial
't Hooft loop, which measures the electric flux. We then present new lattice
data for 3D N=8 k-strings as long as 3`fm' that provide further confirmation.
Finally we suggest new tests in theories with spontaneous breaking and in
SO(4n+2) gauge groups.


title: Fine and hyperfine structure in different bound systems

abstract:
  We demonstrate that the generalized Gell-Mann-Low theorem permits for a
systematic expansion around the nonrelativistic limit when applied to bound
states in the Wick-Cutkosky model, Yukawa theory, and QED (in Coulomb gauge).
We apply this expansion to obtain new results for the fine and hyperfine
structure of bound states in the cases of the Wick-Cutkosky model and Yukawa
theory, and reproduce correctly the fine and hyperfine structure of hydrogenic
systems.


title: The 1/N_c Approach for Baryon Resonances

abstract:
  I give a brief overview of the model-independent analysis of unstable baryon
resonances in the 1/N_c QCD expansion. This approach produces numerous
surprising semi-quantitative phenomenological predictions that are supported by
available observations.


title:
Fragmentation, NRQCD and NNLO Factorization Analysis in Heavy Quarkonium
  Production

abstract:
  We discuss heavy quarkonium production through parton fragmentation,
including a review of arguments for the factorization of high-p_T particles
into fragmentation functions for hadronic initial states. We investigate the
further factorization of fragmentation functions in the NRQCD formalism, and
argue that this requires a modification of NRQCD octet production matrix
elements to include nonabelian phases, which makes them gauge invariant. We
describe the calculation of uncanceled infrared divergences in fragmentation
functions that must be factorized at NNLO, and verify that they are absorbed
into the new, gauge invariant matrix elements.


title:
The liquid Argon TPC: a powerful detector for future neutrino
  experiments and proton decay searches

abstract:
  We discuss the possibility of new generation neutrino and astroparticle
physics experiments exploiting the liquid Argon Time Projection Chamber (LAr
TPC) technique, following a graded strategy that envisions applications with
increasing detector masses (from 100 ton to 100 kton). The ICARUS R&D program
has already demonstrated that the technology is mature with the test of the
T600 detector at surface. Since 2003 we have been working with the conceptual
design of a very large LAr TPC with a mass of 50-100 kton to be built by
employing a monolithic technology based on the use of industrial, large volume,
cryogenic tankers developed by the petro-chemical industry. Such a detector, if
realized, would be an ideal match for a Super Beam, Beta Beam or Neutrino
Factory, covering a broad physics program that includes the detection of
atmospheric, solar and supernova neutrinos, and searches for proton decay, in
addition to the rich accelerator neutrino physics program. A "test module" with
a mass of the order of 10 kton operated underground or at shallow depth would
represent a necessary milestone towards the realization of the 100 kton
detector, with an interesting physics program on its own. In parallel, physics
is calling for a shorter scale application of the LAr TPC technique at the
level of 100 ton mass, for low energy neutrino physics and for use as a near
station setup in future long baseline neutrino facilities. We outline here the
main physics objectives and the design of such a detector for operation in the
upcoming T2K neutrino beam. We finally present the result of a series of R&D
studies conducted with the aim of validating the design of the proposed
detectors.


title:
Heavy-flavor effects in soft gluon resummation for electroweak boson
  production at hadron colliders

abstract:
  We evaluate the impact of heavy-quark masses on transverse momentum
distributions of W, Z, and supersymmetric neutral Higgs bosons at the Tevatron
and LHC. The masses of charm and bottom quarks act as non-negligible momentum
scales at small transverse momentum, and affect resummation of soft and
collinear radiation. We point out inconsistencies in the treatment of
heavy-flavor channels at small transverse momentum in massless factorization
schemes, and formulate small transverse momentum resummation in a general-mass
variable flavor number factorization scheme. The improved treatment of the
quark mass dependence leads to non-negligible effects in precision measurements
of the W boson mass at the LHC, and may cause observable modifications in
production of Higgs bosons and other particles in heavy-quark scattering.


title: Light Neutralino Dark Matter in the NMSSM

abstract:
  Neutralino dark matter is generally assumed to be relatively heavy, with a
mass near the electroweak scale. This does not necessarily need to be the case,
however. In the Next-to-Minimal Supersymmetric Standard Model (NMSSM) and other
supersymmetric models with an extended Higgs sector, a very light CP-odd Higgs
boson can naturally arise making it possible for a very light neutralino to
annihilate efficiently enough to avoid being overproduced in the early
Universe.
  In this article, we explore the characteristics of a supersymmetric model
needed to include a very light neutralino, 100 MeV $< \mcnone <$ 20 GeV, using
the NMSSM as a prototype. We discuss the most important constraints from
Upsilon decays, $b \to s \gamma$, $B_s \to \mu^+ \mu^-$ and the magnetic moment
of the muon, and find that a light bino or singlino neutralino is allowed, and
can be generated with the appropriate relic density.
  It has previously been shown that the positive detection of dark matter
claimed by the DAMA collaboration can be reconciled with other direct dark
matter experiments such as CDMS II if the dark matter particle is rather light,
between about 6 and 9 GeV. A singlino or bino-like neutralino could easily fall
within this range of masses within the NMSSM. Additionally, models with sub-GeV
neutralinos may be capable of generating the 511 keV gamma-ray emission
observed from the galactic bulge by the INTEGRAL/SPI experiment.
  We also point out measurements which can be performed immediately at CLEO,
BaBar and Belle using existing data to discover or significantly constrain this
scenario.


title:
Constraints on mass matrices due to measured property of the mixing
  matrix

abstract:
  It is shown that two specific properties of the unitary matrix $V$ can be
expressed directly in terms of the matrix elements and eigenvalues of the
hermitian matrix $M$ which is diagonalized by $V$. These are the asymmetry
$\Delta(V)= |V_{12}|^2- |V_{21}|^2$, of $V$ with respect to the main diagonal
and the Jarlskog invariant $J(V)= {\rm Im}(V_{11}V_{12}^* V_{21}^* V_{22})$.
These expressions for $\Delta(V)$ and $J(V)$ provide constraints on possible
mass matrices from the available data on $V$.


title: Dilepton production from hot hadronic matter in nonequilibrium

abstract:
  The influence of time dependent medium modifications of low mass vector
mesons on dilepton yields is investigated within a nonequilibrium quantum field
theoretical description on the basis of the Kadanoff-Baym equations. Time
scales for the adaption of the spectral properties to changing self energies
are given and, under use of a model for the fireball evolution, nonequilibrium
dilepton yields from the decay of rho- and omega-mesons are calculated. In a
comparison of these yields with those from calculations that assume
instantaneous (Markovian) adaption to the changing medium, quantum mechanical
memory effects turn out to be important.


title:
The QCD Pomeron in Ultraperipheral Heavy Ion Collisions: V. Double
  Vector Meson Production in the BFKL Approach

abstract:
  In this work the double vector meson production in ultraperipheral heavy ion
collisions is investigated within the BFKL approach. The integrated cross
sections and event rates for the processes AA --> V1 V2 AA (V_i = rho, omega,
phi, J/Psi, Upsilon) are computed and theoretical estimates for scattering on
both light and heavy nuclei are given for energies of RHIC and LHC.


title: Quark-lepton symmetry and complementarity

abstract:
  We argue that the difference between the observed approximate quark-lepton
complementarity and the theoretical prediction based on realistic quark-lepton
symmetry within the seesaw mechanism may be adjusted by means of a triplet
contribution in the seesaw formula.


title: Diquark Bose-Einstein condensation

abstract:
  Bose-Einstein condensation (BEC) of composite diquarks in quark matter (the
color superconductor phase) is discussed using the quasi-chemical equilibrium
theory at a relatively low density region near the deconfinement phase
transition, where dynamical quark-pair fluctuations are assumed to be described
as bosonic degrees of freedom (diquarks). A general formulation is given for
the diquark formation and particle-antiparticle pair-creation processes in the
relativistic flamework, and some interesting properties are shown, which are
characteristic for the relativistic many-body system. Behaviors of transition
temperature and phase diagram of the quark-diquark matter are generally
presented in model parameter space, and their asymptotic behaviors are also
discussed. As an application to the color superconductivity, the transition
temperatures and the quark and diquark density profiles are calculated in case
with constituent/current quarks, where the diquark is in bound/resonant state.
We obtained $T_C \sim 60-80$ MeV for constituent quarks and $T_C \sim 130$ MeV
for current quarks at a moderate density ($\rho_b \sim 3 \rho_0$). The method
is also developed to include interdiquark interactions into the quasi-chemical
equilibrium theory within a mean-field approximation, and it is found that a
possible repulsive diquark-diquark interaction lowers the transition
temperature by nearly 50%.


title:
Probing photon helicity in radiative B decays via charmonium resonance
  interference

abstract:
  We investigate a new method to probe the helicity of the photon emitted in
the b -> s gamma transition. The method relies on the observation of
interference effects between two resonance contributions, B -> K*(K gamma)
gamma and B -> eta_c(gamma gamma) K or B -> chi_c0(gamma gamma) K to the same
final state K gamma gamma. Decays of the type B -> K_res(K gamma) gamma
dominate the B -> K gamma gamma yield throughout most of the phase space, and
may be accessible at current B meson facilities already.


title: Isospin symmetry breaking through pi^0 - eta -eta' mixing

abstract:
  Mixing of the pseudoscalar mesons is discussed in the quark-flavor basis. The
divergences of the axial vector currents which embody the axial vector anomaly,
combined with the assumption that the decay constants follow the pattern of
particle state mixing in that basis, determine the mixing parameters for given
masses of the physical mesons. These mixing parameters are compared in some
detail with results from other work. Phenomenological applications of the
quark-flavor mixing scheme are presented with particular interest focussed on
isospin symmetry breaking which is generated by means of eta and eta'
admixtures to the pion. Consequences of a possible difference in the basis
decay constants f_u and f_d for the strength of isospin symmetry breaking are
also examined.


title: Improved Hartree--Fock resummations and spontaneous symmetry breaking

abstract:
  The standard Hartree--Fock approximation of the $O(N)-$invariant $\phi^4$
model suffers from serious renormalization problems. In addition, when the
symmetry is spontaneously broken, another shortcoming appears in relation to
the Goldstone bosons: they fail to be massless in the intermediate states. In
this work, within the framework of out--of--equilibrium Quantum Field Theory,
we propose a class of systematic improvements of the Hartree--Fock resummation
which overcomes all the above mentioned difficulties while ensuring also exact
Renormalization--Group invariance to one loop.


title: Kertesz line and embedded monopoles in QCD

abstract:
  We propose a new class of defects in QCD which can be viewed as ``embedded''
monopoles made of quark and gluon fields. These objects are explicitly
gauge-invariant and they closely resemble the Nambu monopoles in the Standard
Electroweak model. We argue that the ``embedded QCD monopoles'' are
proliferating in the quark gluon plasma phase while in the low-temperature
hadronic phase the spatial proliferation of these objects is suppressed. At
realistic quark masses and zero chemical potential the hadronic and quark-gluon
phases are generally believed to be connected by a smooth crossover across
which all thermodynamic quantities are non-singular. We argue that these QCD
phases are separated by a well-defined boundary -- known as the Kertesz line in
condensed matter systems -- associated with the onset of the proliferation of
the embedded QCD monopoles in the quark gluon plasma phase.


title: Testing saturation with large-mass diffraction in DIS

abstract:
  In large-mass diffraction in deep inelastic scattering, we study the gluon
jet close to the rapidity gap and show that its transverse momentum spectrum is
peaked around a value which caracterizes the onset of S-matrix unitarity. We
argue that such a measurement of diffractive jets could help understanding if
at the present energies, unitarity comes as a consequence of saturation.


title: General partonic structure for hadronic spin asymmetries

abstract:
  The high energy and large p_T inclusive polarized process, (A, S_A) + (B,
S_B) --> C + X, is considered under the assumption of a generalized QCD
factorization scheme. For the first time all transverse motions, of partons in
hadrons and of hadrons in fragmenting partons, are explicitly taken into
account; the elementary interactions are computed at leading order with
noncollinear exact kinematics, which introduces many phases in the expressions
of their helicity amplitudes. Several new spin and k_T dependent soft functions
appear and contribute to the cross sections and to spin asymmetries; we put
emphasis on their partonic interpretation, in terms of quark and gluon
polarizations inside polarized hadrons. Connections with other notations and
further information are given in some Appendices. The formal expressions for
single and double spin asymmetries are derived. The transverse single spin
asymmetry A_N, for p(transv. polarized) p --> pion + X processes is considered
in more detail, and all contributions are evaluated numerically by saturating
unknown functions with their upper positivity bounds. It is shown that the
integration of the phases arising from the noncollinear kinematics strongly
suppresses most contributions to the single spin asymmetry, leaving at work
predominantly the Sivers effect and, to a lesser extent, the Collins mechanism.


title: Mach cones in an evolving medium

abstract:
  The energy and momentum lost by a hard parton propagating through hot and
dense matter has to be redistributed in the nuclear medium. Apart from heating
the medium, there is the possibility that collective modes are excited. We
outline a formalism that can be used to track the propagation of such a mode
through the evolving medium if its dispersion relation is known. Under the
assumption that a sound wave is created, we track the jet energy loss as a
function of spacetime and follow the resulting mach cone throughout the
fireball evolution.We compare with the angular correlation pattern of hard
hadrons as obtained by the PHENIX collaboration and find good agreement with
the data provided that a substantial fraction of jet energy ($\sim$ 90%) is
deposited into a propagating mode and that the hot matter can be characterized
by an EOS with a soft point (not necessarily a mixed phase).


title: The Double Simplex

abstract: A new way to envision particles and interactions.


title: J/psi dissociation and Adler's theorem

abstract:
  Effective Lagrangian models of charmonium have recently been used to estimate
dissociation cross sections with light hadrons. Detailed study of the symmetry
properties reveals possible shortcomings relative to chiral symmetry. We
therefore propose a new Lagrangian and point out distinguishing features
amongst the different approaches. Using the newly proposed Lagrangian, which
exhibits SU_L(4) X SU_R(4) symmetry and complies with Adler's theorem, we find
dissociation cross sections with pions that are reduced in an energy dependent
way, with respect to cases where the theorem is not fulfilled.


title: A Solution to the Supersymmetric Fine-Tuning Problem within the MSSM

abstract:
  Weak scale supersymmetry has a generic problem of fine-tuning in reproducing
the correct scale for electroweak symmetry breaking. The problem is
particularly severe in the minimal supersymmetric extension of the standard
model (MSSM). We present a solution to this problem that does not require an
extension of the MSSM at the weak scale. Superparticle masses are generated by
a comparable mixture of moduli and anomaly mediated contributions, and the
messenger scale of supersymmetry breaking is effectively lowered to the TeV
region. Crucial elements for the solution are a large A term for the top
squarks and a small B term for the Higgs doublets. Requiring no fine-tuning
worse than 20%, we obtain rather sharp predictions on the spectrum. The gaugino
masses are almost universal at the weak scale with the mass between 450 and 900
GeV. The squark and slepton masses are also nearly universal at the weak scale
with the mass a factor of \sqrt{2} smaller than that of the gauginos. The only
exception is the top squarks whose masses split from the other squark masses by
about m_t/\sqrt{2}. The lightest Higgs boson mass is smaller than 120 GeV,
while the ratio of the vacuum expectation values for the two Higgs doublets,
tan\beta, is larger than about 5. The lightest superparticle is the neutral
Higgsino of the mass below 190 GeV, which can be dark matter of the universe.
The mass of the lighter top squark can be smaller than 300 GeV, which may be
relevant for Run II at the Tevatron.


title:
Hadronic Production of $B_c(B^*_c)$ Meson Induced by the Heavy Quarks
  inside the Collision Hadrons

abstract:
  In general-mass variable-flavor-number (GM-VFN) scheme, the `heavy quark
mechanisms' of $B_c(B_c^*)$ meson hadroproduction via the sub-processes $g+c\to
B_c(B_c^*)+...$ and $g+\bar{b}\to B_c(B_c^*)+...$ are investigated. In the
scheme, possible double counting from these mechanisms and the `light
mechanisms' (the gluon-gluon fusion and quark-antiquark annihilation
mechanisms) is subtracted properly. The numerical results show that the
transverse momentum, $p_t$, distribution of the produced $B_c(B_c^*)$ from the
`intrinsic heavy quark mechanisms' (i.e. the heavy quark mechanisms in which
the double counting components have been subtracted accordingly) declines
faster with the increment of the $p_t$ than that from the `light mechanisms',
and only in small $p_t$ region ($p_t\lesssim 7.0$ GeV) the `intrinsic heavy
quark mechanisms' themselves may make remarkable contributions. The combined
contributions from the `intrinsic heavy quark mechanisms' and the `light
mechanisms' to the production are compared with that obtained by the most
calculations in literature, which in some sense are within the fixed flavor
number (FFN) scheme at leading order, and we find that the production by virtue
of the GM-VFN scheme is more or less the same as the one in literature, except
in the small $p_t$ region.


title:
Implications of a new particle from the HyperCP data on \Sigma^+ \to p
  \mu^+ \mu^-

abstract:
  The HyperCP collaboration has recently reported the observation of three
events for the decay \Sigma^+ \to p mu^+ mu^- with an invariant mass
m_{\mu^+\mu^-} for a muon and an anti-muon pair of \sim 214 MeV. They suggest
that a new particle state X may be needed to explain the observed
m_{\mu^+\mu^_} distribution. Motivated by this result, we study the properties
of such a hypothetical particle. We first use K^+ \to pi^+ \mu^+\mu^- data to
conclude that X cannot be a scalar or a vector particle. We then collect
existing constraints on a pseudo-scalar or axial vector X and find that these
possibilities are still allowed as explanations for the HyperCP data. Finally
we assume that the HyperCP data is indeed explained by a new pseudo-scalar or
axial vector particle and use this to predict enhanced rates for K_L \to
\pi^+\pi^- X \to \pi^+\pi^-\mu^+\mu^- and \Omega^- to \Xi^- X \to \Xi^-
\mu^+\mu^-.


title:
Radiative decays of quarkonium states, momentum operator expansion and
  nilpotent operators

abstract:
  We present the method of calculation of radiative decays of composite
quark-antiquark systems with different J^{PC}: (Q\bar Q)_{in} -> gamma (Q\bar
Q)_{out}. The method is relativistic invariant, it is based on the double
dispersion relation integrals over the masses of composite mesons, it can be
used for the high spin particles and provides us with the gauge invariant
transition amplitudes. We apply this method to the case when the photon is
emitted by a constituent in the intermediate state (additive quark model). We
perform the momentum operator expansion of the spin amplitudes for the decay
processes. The problem of nilpotent spin operators is discussed.


title:
Predicting the tauon mass as well as the ratio of electron and muon
  masses

abstract:
  Treating the Koide equation and another efficient charged-lepton mass formula
(having the form of a mass sum rule) as a system of two mathematically
independent algebraic equations for three charged-lepton masses, we predict the
tauon mass as well as the ratio of electron and muon masses, both consistent
with experiment.


title: The Equation of State of an Interacting Tachyon

abstract:
  We examine the cosmological solutions of a tachyon field non minimally
coupled to gravity through an effective Born-Infeld interacting Lagrangian with
a power law potential, in order to investigate its equation of state as related
to tracking properties. We find exact solutions in the case of a tachyon
dominated Universe and when the dominant component of the stress energy tensor
is determined by some other perfect fluid.


title: V(us) Determination from Hyperon Semileptonic Decays

abstract:
  We analyze the numerical determination of the quark mixing factor V(us) from
hyperon semileptonic decays. The discrepancies between the results obtained in
two previous studies are clarified. Our fits indicate sizeable SU(3) breaking
corrections, which unfortunately can only be fully determined from the data at
the first order. The lack of a reliable theoretical calculation of second-order
symmetry breaking effects translates into a large systematic uncertainty, which
has not been taken into account previously. Our final result, V(us) = 0.226 +/-
0.005, is not competitive with the existing determinations from K(l3), K(l2)
and \tau decays.


title: Triple-quark elastic scatterings and thermalization

abstract:
  Triple-quark elastic scattering amplitudes from perturbative QCD are first
calculated and then used in a transport equation to study the thermalization of
quark matter. By examining momentum isotropy to which the transport equation
leads, we can determine thermalization time and offer an initial thermal quark
distribution function. With an anisotropic initial quark distribution, which is
relevant to quark matter initially created in a central Au-Au collision at
\sqrt {s_{NN}}=200 GeV, the transport equation gives a time of the order of 1.8
fm/c for quark matter itself to thermalize by the triple-quark scatterings.


title:
Poincare-invariant spectator-model currents for electroweak nucleon form
  factors

abstract:
  The relativistic constituent quark model of low-energy quantum chromodynamics
is found to yield a consistent picture of the electroweak structure of the
nucleons. Notably, the electromagnetic and axial form factors of both the
proton and the neutron can be described in close agreement with existing
experimental data in the domain of low to moderate momentum transfers. For the
theory it is mandatory to respect Poincare invariance and to fulfill additional
conditions like charge normalization. Here we present covariant predictions of
the one-gluon-exchange and Goldstone-boson-exchange constituent quark models
for the electroweak form factors of the nucleons and give a critical discussion
of the results in view of the point-form spectator model employed for the
electromagnetic and axial current operators.


title: Two-loop matching coefficients for the strong coupling in the MSSM

abstract:
  When relating the strong coupling $\alpha_s$, measured at the scale of the
$Z$ boson mass, to its numerical value at some higher energy, for example the
scale of Grand Unification, it is important to include higher order corrections
both in the running of $\alpha_s$ and the decoupling of the heavy particles. We
compute the two-loop matching coefficients for $\alpha_s$ within the Minimal
Supersymmetric Standard Model (MSSM) which are necessary for a consistent
three-loop evolution of the strong coupling constant. Different scenarios for
the hierarchy of the supersymmetric scales are considered and the numerical
effects are discussed. We find that the three-loop effects can be as large as
and sometimes even larger than the uncertainty induced by the current
experimental accuracy of $\alpha_s(M_Z)$.


title: Annihilation effects in $B \to \pi\pi$ from QCD Light-Cone Sum Rules

abstract:
  Using the method of QCD light-cone sum rules, we calculate the $B \to \pi\pi$
hadronic matrix elements with annihilation topology. We obtain a finite result,
including the related strong phase. Numerically, the annihilation effects in
$B\to \pi\pi$ turn out to be small with respect to the factorizable emission
mechanism. Our predictions, together with the earlier sum rule estimates of
emission and penguin contributions, are used for the phenomenological analysis
of $B\to \pi\pi$ channels. We predict a $\Delta I=1/2$ transition amplitude
which significantly differs from this amplitude extracted from the current
data.


title:
S wave K\pi scattering and effects of \kappa in J/\psi\to {\bar
  K}^{*0}(892)K^+\pi^-

abstract:
  $K\pi$ $S$ wave scattering is studied using a chiral unitary approach (ChUT)
taking into account coupled channels. With the amplitudes derived from the
lowest order chiral Lagrangian as the kernel of a set of coupled channel
Bathe-Salpeter equations, the $I=1/2$ $S$ wave $K\pi$ scattering phase shifts
below 1.2 GeV can be fitted by one parameter, a subtraction constant, and a
scalar resonance corresponding to the controversial $\kappa$ ($K^*_0(800)$) can
be generated dynamically. A good description of the $I=3/2$ $S$ wave $K\pi$
scattering phase shifts below 1.2 GeV can also be obtained. An artificial
singularity in the conventional cut-off method of the 2-meson loop integral of
the ChUT is found. The formalism is applied to deal with the $S$ wave $K\pi$
final state interaction (FSI) in the decay $J/\psi\to {\bar
K}^{*0}(892)K^+\pi^-$, and a qualitatively good fit to the data is achieved.
The role of $\kappa$ in the decay is discussed.


title: Hadronic fluctuations at the QCD phase transition

abstract:
  We discuss the properties of hadronic fluctuations, i.e. fluctuations of net
quark and isospin numbers as well as electric charge, in the vicinity of the
QCD transition in isospin-symmetric matter at vanishing quark chemical
potential. We analyse second- and fourth-order cumulants of these fluctuations
and argue that the ratio of quartic and quadratic cumulants reflects the
relevant degrees of freedom that carry the quark number, isospin or charge,
respectively. In the hadronic phase we find that an enhancement of charge
fluctuations arises from contributions of doubly charged hadrons to the
thermodynamics. The rapid suppression of fluctuations seen in the
high-temperature phase suggests that in the QGP, net quark number and electric
charge are predominantly carried by quasi-particles, with the quantum numbers
of quarks.


title:
Asymptotic thermal quark masses and the entropy of QCD in the large-N_f
  limit

abstract:
  We study the thermodynamics of QCD in the limit of large flavor number (N_f)
and test the proposal to resum the physics of hard thermal loops (HTL) through
a nonperturbative expression for the entropy obtained from a Phi-derivable
two-loop approximation. The fermionic contribution to the entropy involves a
full next-to-leading order evaluation of the asymptotic thermal quark mass,
which is non-local, and for which only a weighted average value was known
previously. For a natural choice of renormalization scale we find remarkably
good agreement of the next-to-leading-order HTL results for the fermion self
energy and in turn for the entropy with the respective exact large-N_f results
even at very large coupling.


title:
Rapidity dependence of HBT correlation radii in non-boost invariant
  models

abstract:
  Hanbury-Brown Twiss (HBT) correlation measurements provide valuable
information about the phase space distribution of matter in ultrarelativistic
heavy-ion collisions. The rapidity dependence of HBT radii arises from a
nontrivial interplay between longitudinal and transverse expansion and the time
dependence of the freeze-out pattern. For a non-accelerating longitudinal
expansion the dependence primarily arises from the amount of radiating matter
per unit rapidity $dN/d\eta$, but for a scenario with strong longitudinal
acceleration additional complications occur. In this paper I explore
schematically what type of dependence can be expected for RHIC conditions under
different model assumptions for the dynamics of spacetime expansion and
freeze-out.


title:
Hidden Local Symmetry and Effective Chiral Theory for Vector and
  Axial-vector Mesons

abstract:
  The Lagrangian of pseudoscalar, vector, and axial-vector mesons is determined
by the explicit global chiral symmetry and hidden local chiral symmetry. There
are fourteen interacting terms up to the dimension-four of covariant
derivatives rather than the usual eleven interacting terms given in literature
from hidden local symmetry approach. There are only two independent parameters.
The three new terms are important in phenomenology.


title:
Two-photon-exchange effects in the electro-excitation of the $\Delta$
  resonance

abstract:
  We evaluate the two-photon exchange contribution to the $e N \to e
\Delta(1232) \to e \pi N$ process at large momentum transfer with the aim of a
precision study of the ratios of electric quadrupole (E2) and Coulomb
quadrupole (C2) to the magnetic dipole (M1) $\gamma^* N \Delta$ transitions. We
relate the two-photon exchange amplitude to the $N \to \Delta$ generalized
parton distributions and obtain a quantitative estimate of the two-photon
effects. The two-photon exchange corrections to the C2/M1 ratio depend strongly
on whether this quantity is obtained from an interference cross section or from
the Rosenbluth-type cross sections, in similarity with the elastic, $e N \to e
N$, process.


title: Determining Sneutrino Masses and Physical Implications

abstract:
  In some areas of supersymmetry parameter space, sneutrinos are lighter than
the charginos and the next-to-lightest neutralino, and they decay into the
invisible neutrino plus lightest-neutralino channel with probability one. In
such a scenario they can be searched for in decays of charginos that are
pair-produced in e+e- collisions, and in associated sneutrino-chargino
production in photon-electron collisions. The sneutrino properties can be
determined with high accuracy from the edges of the decay energy spectra in the
first case and from threshold scans in the second. In the final part of the
report we investigate the mass difference of sneutrinos and charged sleptons
between the third and the first two generations in seesaw-type models of the
neutrino/sneutrino sector. For a wide range these mass differences are
sensitive to the seesaw scale.


title:
NLO Corrections to lepton pair production beyond the Standard Model at
  hadron colliders

abstract:
  We consider lepton pair production at a hadron collider in a class of
effective theories with the relevant operators being four-fermion contact
interaction. Despite the nonrenormalizable nature of the interaction, we
explicitly demonstrate that calculating QCD corrections is both possible and
meaningful. Calculating the corrections for various differential distributions,
we show that these can be substantial and significantly different from those
within the SM. Furthermore, the corrections have a very distinctive flavour
dependence. And finally, the scale dependence of the cross sections are greatly
reduced once the NLO corrections are taken into account.


title: Soft Rescattering in DIS: Effects of Helicity Flip

abstract:
  Soft rescattering in hard QCD processes may involve non-perturbative, chiral
symmetry breaking interactions. We find that rescattering which changes the
helicity of the struck quark gives rise to a leading twist single spin
asymmetry in semi-inclusive DIS, the angular dependence of which is the same as
that usually ascribed to the Collins effect.
  We argue that helicity-changing rescattering can contribute also to
$k_\perp$-integrated parton distributions.


title: The neural network approach to parton distributions

abstract:
  We introduce the neural network approach to global fits of parton
distrubution functions. First we review previous work on unbiased
parametrizations of deep-inelastic structure functions with faithful estimation
of their uncertainties, and then we summarize the current status of neural
network parton distribution fits.


title: Spectroscopy of Pentaquark Baryons

abstract:
  A review is given to pentaquark mass predictions in quark models and QCD. It
is pointed out that no successful quark model prediction is available for
low-lying pentaquark states. Some new results of direct application of QCD, QCD
sum rules and lattice QCD, are also presented.


title: Primordial black holes from monopoles connected by strings

abstract:
  Primordial black holes (PBHs) are known to be produced from collapsing cosmic
defects such as domain walls and strings. In this paper we show how PBHs are
produced in monopole-string networks.


title: Primordial black holes from cosmic necklaces

abstract:
  Cosmic necklaces are hybrid topological defects consisting of monopoles and
strings. We argue that primordial black holes(PBHs) may have formed from loops
of the necklaces, if there exist stable winding states, such as coils and
cycloops. Unlike the standard scenario of PBH formation from string loops, in
which the kinetic energy plays important role when strings collapse into black
holes, the PBH formation may occur in our scenario after necklaces have
dissipated their kinetic energy. Then, the significant difference appears in
the production ratio. In the standard scenario, the production ratio $f$
becomes a tiny fraction $f\sim 10^{-20}$, however it becomes $f \sim 1$ in our
case. On the other hand, the typical mass of the PBHs is much smaller than the
standard scenario, if they are produced in the same epoch. As the two
mechanisms may work at the same time, the necklaces may have more than one
channel of the gravitational collapse. Although the result obtained in this
paper depends on the evolution of the dimensionless parameter $r$, the
existence of the winding state could be a serious problem in some cases. Since
the existence of the winding state in brane models is due to the existence of a
non-tivial circle in the compactified space, the PBH formation can be used to
probe the structure of the compactified space. Black holes produced by this
mechanism may have peculiar properties.


title: Topological Curvatons

abstract:
  Topological defects may play the role of the curvatons. We propose a new
mechanism of generating density perturbations from cosmological defects in
inflationary models. We show several examples in which defects play crucial
role in generating density perturbations.


title: Dark matter production from cosmic necklaces

abstract:
  Cosmic strings have gained a great interest, since they are formed in a large
class of brane inflationary models. The most interesting story is that cosmic
strings in brane models are distinguished in future cosmological observations.
If the strings in brane models are branes or superstrings that can move along
compactified space, and also if there are degenerated vacua along the
compactified space, kinks interpolate between degenerated vacua become
``beads'' on the strings. In this case, strings turn into necklaces. In the
case that the compact manifold in not simply connected, a string loop that
winds around a nontrivial circle is stable due to the topological reason. Since
the existence of the (quasi-)degenerated vacua and the nontrivial circle is a
common feature of the brane models, it is important to study cosmological
constraints on the cosmic necklaces and the stable winding states. In this
paper, we consider dark matter production from loops of the cosmic necklaces.
Our result suggests that necklaces can put stringent bound on certain kinds of
brane models.


title:
Generalized Tri-bimaximal Neutrino Mixing and Its Sensitivity to
  Radiative Corrections

abstract:
  We argue that the tri-bimaximal neutrino mixing pattern $V_0$ or its
generalized form $V'_0$, which includes two arbitrary Majorana phases of CP
violation, may result from an underlying flavor symmetry at a superhigh energy
scale close to the seesaw scale ($\sim 10^{14}$ GeV). Taking the working
assumption that three neutrino masses are nearly degenerate, we calculate
radiative corrections to $V_0$ and $V'_0$ in their evolution down to the
electroweak scale ($\sim 10^2$ GeV). Three mixing angles of $V_0$ or $V'_0$ are
essentially stable against radiative corrections in the standard model (SM). In
the minimal supersymmetric standard model (MSSM), however, $V_0$ is in general
disfavored and $V'_0$ can be compatible with current neutrino oscillation data
if its two Majorana phases $\alpha^{}_1$ and $\alpha^{}_2$ are properly
fine-tuned. We also find that it is possible to radiatively generate the
CP-violating phase $\delta$ from $\alpha^{}_1$ and $\alpha^{}_2$, and \delta
may keep on staying at its fixed point in either the SM or the MSSM.


title: Nuclear Corrections for Cross Section of Lepton Inelastic Scattering

abstract:
  Main nuclear corrections for inelastic scattering of charged leptons on
nuclei, namely shadowing, EMC-effect and Fermi motion have been investigated.
Simple formulas describing these effects for different x-regions have been
proposed, and unified expression for any transferred energy and momentum as
well as for different nuclei has been obtained. Results of calculations of the
ratio of nucleus structure function (per nucleon) and free nucleon structure
function are in a good agreement with SLAC data.


title: Neural network approach to parton distributions fitting

abstract:
  We will show an application of neural networks to extract information on the
structure of hadrons. A Monte Carlo over experimental data is performed to
correctly reproduce data errors and correlations. A neural network is then
trained on each Monte Carlo replica via a genetic algorithm. Results on the
proton and deuteron structure functions, and on the nonsinglet parton
distribution will be shown.


title: Phases of QCD

abstract:
  In these lectures we provide an introduction to the phase structure of QCD.
We begin with a brief discussion of QCD, the symmetries of QCD, and what we
mean by a ``phase of QCD''. In the main part of the lectures we discuss the
phase diagram of QCD as a function of the temperature and the baryon density.
We focus, in particular, on the high temperature plasma phase, the low
temperature and low density nuclear phase, and the high density color
superconducting phases.


title: Global analysis of muon decay measurements

abstract:
  We have performed a global analysis of muon decay measurements to establish
model-independent limits on the space-time structure of the muon decay matrix
element. We find limits on the scalar, vector and tensor coupling of right- and
left-handed muons to right- and left-handed electrons. The limits on those
terms that involve the decay of right-handed muons to left-handed electrons are
more restrictive than in previous global analyses, while the limits on the
other non-standard model interactions are comparable. The value of the Michel
parameter eta found in the global analysis is -0.0036 \pm 0.0069, slightly more
precise than the value found in a more restrictive analysis of a recent
measurement. This has implications for the Fermi coupling constant G_F.


title: Signatures of anomalous VVH interactions at a linear collider

abstract:
  We examine, in a model independent way, the sensitivity of a Linear Collider
to the couplings of a light Higgs boson to gauge bosons. Including the
possibility of CP violation, we construct several observables that probe the
different anomalous couplings possible. For an intermediate mass Higgs, a
collider operating at a center of mass energy of 500 GeV and with an integrated
luminosity of 500 fb$^{-1}$ is shown to be able to constrain the $ZZH$ vertex
at the few per cent level, and with even higher sensitivity in certain
directions. However, the lack of sufficient number of observables as well as
contamination from the $ZZH$ vertex limits the precision with which the $WWH$
coupling can be measured.


title:
An Effective Higgsless Theory: Satisfying Electroweak Constraints and a
  Heavy Top Quark

abstract:
  The main challenge faced by Higgsless models of electroweak symmetry breaking
is to reconcile the experimental constraints imposed by the precision
electroweak data and the top quark phenomenology with the unitarity constraints
imposed by longitudinal gauge boson scattering amplitudes. In this paper we
expand on previous work, giving details of how delocalized fermions can be used
to adjust the $S$ parameter to zero, while keeping the $T$ and $U$ parameters
naturally suppressed. We also show that it is possible to obtain the top quark
mass, without affecting the delay of unitarity violation of the $W^+ W^-\to
W^+W^-$ scattering amplitude, by separating the mass scales of the fermion
sector ($1/R_f$) from that of the gauge sector ($1/R_g$). The fermion sector
scale $1/R_f$ is only weakly constrained by unitarity of the $t\bar{t}\to W^+
W^-$ scattering amplitude; thus the ratio $R_g/R_f$ can be quite large, and the
top mass can be easily achieved. Anomalous right-handed couplings involving the
third generation quarks also avoid constraints from experimental data if
$1/R_f$ is sufficiently large.


title: B -> X_s \gamma and B^+ -> l^+ \nu in the 2HDM type III

abstract:
  We consider the Two Higgs Doublet Model (2HDM) of type III which leads to
Flavour Changing Neutral Currents (FCNC) at tree level. In the framework of
this model we calculate the NLO contribution for b->s \gamma and the branchings
for the meson decays B^+ -> l^+ \nu. We examine the limits on the new
parameters \lambda_{bb} and M_{H^\pm}. We take into account the relationship
between \lambda_{tt} and \lambda_{bb} coming from the validness of perturbation
theory.


title:
The phase diagram of neutral quark matter: The effect of neutrino
  trapping

abstract:
  We study the effect of neutrino trapping on the phase diagram of dense,
locally neutral three-flavor quark matter within the framework of a
Nambu--Jona-Lasinio model. In the analysis, dynamically generated quark masses
are taken into account self-consistently. The phase diagrams in the plane of
temperature and quark chemical potential, as well as in the plane of
temperature and lepton-number chemical potential are presented. We show that
neutrino trapping favors two-flavor color superconductivity and disfavors the
color-flavor-locked phase at intermediate densities of matter. At the same
time, the location of the critical line separating the two-flavor
color-superconducting phase and the normal phase of quark matter is little
affected by the presence of neutrinos. The implications of these results for
the evolution of protoneutron stars are briefly discussed.


title: QCD traveling waves at non-asymptotic energies

abstract:
  Using consistent truncations of the BFKL kernel, we derive analytical
traveling-wave solutions of the Balitsky-Kovchegov saturation equation for both
fixed and running coupling. A universal parametrization of the ``interior'' of
the wave front is obtained and compares well with numerical simulations of the
original Balitsky-Kovchegov equation, even at non-asymptotic energies. Using
this universal parametrization, we find evidence for a traveling-wave pattern
of the dipole amplitude determined from the gluon distribution extracted from
deep inelastic scattering data.


title: General Issues Connecting Flavor Symmetry and Supersymmetry

abstract:
  We motivate and construct supersymmetric theories with continuous flavor
symmetry, under which the electroweak Higgs doublets transform non-trivially.
Flavor symmetry is spontaneously broken at a large mass scale in a sector of
gauge-singlet fields; the light Higgs multiplets naturally emerge as special
linear combinations that avoid acquiring the generic large mass. Couplings of
the light Higgs doublets to light moduli fields from the singlet sector could
lead to important effects in the phenomenology of the Higgs sector.


title: Sivers effect in semi-inclusive deeply inelastic scattering

abstract:
  The Sivers function is extracted from HERMES data on single spin asymmetries
in semi-inclusive deeply inelastic scattering. Our analysis use a simple
Gaussian model for the distribution of transverse parton momenta, together with
the flavor dependence given by the leading 1/Nc approximation and a neglect of
the Sivers antiquark distribution. We find that within the errors of the data
these approximations are sufficient.


title:
Rompimiento de la Simetria Electrodebil y la Fisica del Higgs: Conceptos
  Basicos

abstract:
  Presentamos una introduccion a los conceptos basicos del rompimiento de la
simetria electrodebil y la fisica del Higgs dentro del Modelo Estandar y sus
extensiones supersimetricas. Se presenta tambien una breve perspectiva general
de mecanismos alternativos del rompimiento de la simetria. Ademas de las bases
teoricas, se discute el estado actual de la fisica experimental del Higgs y sus
implicaciones para futuros experimentos en el LHC y en colisionadores lineales
e+e-.


title: Soft gluons at large angles in hadron collisions

abstract:
  A general discussion is presented of the single logarithmic soft factor that
appears in two scale QCD observables in processes involving four partons. We
treat it as the ``fifth form factor'', accompanying the four collinear singular
Sudakov form factors attached to colliding and outgoing hard partons. The fifth
form factor is expressed in terms of the Casimir operators (squared colour
charges) of irreducible representations in the crossing $t$- and $u$-channels.
As an application we revisit the problem of large angle radiation in $gg\to gg$
and give a relatively simple solution and interpretation of the results. We
found an unexpected symmetry of the soft anomalous dimension under exchange of
internal and external variables of the problem whose existence calls for
explanation.


title:
Next-to-next-to-next-to-leading-order soft-gluon corrections in
  hard-scattering processes near threshold

abstract:
  I present a unified calculation of soft-gluon corrections to hard-scattering
cross sections through next-to-next-to-next-to-leading order (NNNLO). Master
formulas are derived, from a threshold resummation formalism, that can be
applied to total and differential cross sections for hard-scattering processes
in hadron colliders. I also present numerical results for charged Higgs
production at the LHC where these corrections are large, and for top quark
production at the Tevatron where these corrections greatly reduce the scale
dependence of the cross section.


title:
Current algebra based effective chiral theory of mesons and a new EW
  theory

abstract:
  A current algebra based effective chiral theory of pseudoscalar, vector,
axial-vector mesons is reviewed. A new mechanism generating the masses and
guage fixing terms of gauge boson is revealed from this effective theory. A EW
theory without Higgs is proposed. The masses and gauge fixing terms of W and Z
are dynamically generated. Three heavy scalar fields are dynamically generated
too. They are ghosts.


title:
On the Possibility of a New Boson X^0 (214 MeV) in Sigma^+ -> p mu^+
  mu^-

abstract:
  We consider the existence of the state X^0 (214 MeV) in Sigma^+ -> p mu^+
mu^- decay found by the HyperCP collaboration. We assume that a fundamental
spin zero boson X^0 coupled to quarks leads to flavor changing s -> d X^0
process. We estimate the scalar and pseudoscalar coupling constants by
considering Sigma^+ -> p X^0 and K^+ -> pi^+ X^0 processes, and find that
pseudoscalar coupling dominates. We then evaluate the branching ratios for K_L
-> pi^0 pi^0 X^0, pi^+ pi^- X^0 and Omega^- -> Xi^- X^0 decays. All these rates
are found to be in the measurable ranges. We also comment on X^0 coupling to
muons and constraints from muon g-2.


title:
Branching ratio for B -> K_1 gamma decay in next-to-leading order in
  LEET

abstract:
  Branching ratio for B -> K_1 gamma at next-to-leading order of alpha_s has
been calculated in Large Energy Effective Theory. By incorporating the higher
twist effects in light cone decay amplitude for axial K-meson, it is shown that
the form factor is not sensitive to these twists.


title:
Anomaly and Anomaly-Free Treatment of QFTs Based on Symmetry-preserving
  Loop Regularization

abstract:
  The triangle anomaly in massless and massive QED is investigated by adopting
the symmetry-preserving loop regularization method proposed recently in
\cite{LR}. The method is realized in the initial dimension of theory without
modifying the original lagrangian, it preserves symmetries under non-Abelian
gauge and Poincare transformations in spite of the existence of two intrinsic
mass scales $M_c$ and $\mu_s$ which actually play the roles of UV- and IR-cut
off respectively. The axialvector-vector-vector (AVV) triangle diagrams in
massless and massive QED are evaluated explicitly by using the loop
regularization. It is shown that when the momentum $k$ of external state is
soft with $k^2 \ll \mu_s^2, m^2 $ ($m$ is the mass of loop fermions) and $ M_c
\to \infty$, both massless and massive QED become anomaly free. The triangle
anomaly is found to appear as quantum corrections in the case that $ m^2,
\mu_s^2 \ll k^2 $ and $M_c \to \infty$. Especially, it is justified that in the
massless QED with $\mu_s =0$ and $M_c\to \infty$, the triangle anomaly
naturally exists as quantum effects in the axial-vector current when the
ambiguity caused by the trace of gamma matrices with $\gamma_5$ is eliminated
by simply using the definition of $\gamma_5$. It is explicitly demonstrated how
the Ward identity anomaly of currents depends on the treatment for the trace of
gamma matrices, which enables us to make a clarification whether the ambiguity
of triangle anomaly is caused by the regularization scheme in the perturbation
calculations or by the trace of gamma matrices with $\gamma_5$.


title:
Electroweak higher-order effects and theoretical uncertainties in
  deep-inelastic neutrino scattering

abstract:
  A previous calculation of electroweak O(alpha) corrections to deep-inelastic
neutrino scattering, as e.g. measured by NuTeV and NOMAD, is supplemented by
higher-order effects. In detail, we take into account universal two-loop
effects from \Delta\alpha and \Delta\rho as well as higher-order final-state
photon radiation off muons in the structure function approach. Moreover, we
make use of the recently released O(alpha)-improved parton distributions
MRST2004QED and identify the relevant QED factorization scheme, which is DIS
like. As a technical byproduct, we describe slicing and subtraction techniques
for an efficient calculation of a new type of real corrections that are induced
by the generated photon distribution. A numerical discussion of the
higher-order effects suggests that the remaining theoretical uncertainty from
unknown electroweak corrections is dominated by non-universal two-loop effects
and is of the order 0.0003 when translated into a shift in
sin^2\theta_W=1-MW^2/MZ^2. The O(alpha) corrections implicitly included in the
parton distributions lead to a shift of about 0.0004.


title: Charmless Final State Interaction in B-> pi pi decays

abstract:
  We estimate effects of the final state interactions in B -> pi pi decays
coming from rescattering of pi pi via exchange of rho, sigma, f_0 mesons. Then
we include the rho rho rescattering via exchange of pi, omega, a_1 mesons and
finally we consider contributions of the a_1 pi rescattering via exchange of
rho. The absorptive parts of amplitudes for these processes are determined. In
the case of pi^+ pi^- decay mode, due to model uncertainties, the calculated
contribution is |M_A| =< 1.7 x 10^-8 GeV. This produces a small relative strong
phase for the tree and color-suppressed B -> pi pi amplitudes consistent with
the result of a recent phenomenological analysis based on the BaBar and Belle
results for the B -> pi pi branching ratios and CP asymmetries.


title:
Reparameterization of the scalar potential in the two Higgs doublet
  model

abstract:
  In the two Higgs doublet model with no additional symmetries in the scalar
sector (different from the gauge and Lorentz symmetries), it is customary to
reparameterize the model by rotating the scalar doublets such that one of the
vacuum expectation values vanishes. It is well known that the Yukawa sector of
the model is unaffected by such transformation. Notwithstanding, since the
Higgs potential must also be transformed, it is necessary to show that such
sector is also unaltered in its physical content. We demostrate that the
physical content of the potential is invariant even when the charge conjugation
symmetry is demanded.


title: QCD and String Theory

abstract:
  This talk begins with some history and basic facts about string theory and
its connections with strong interactions. Comparisons of stacks of Dirichlet
branes with curved backgrounds produced by them are used to motivate the
AdS/CFT correspondence between superconformal gauge theory and string theory on
a product of Anti-de Sitter space and a compact manifold. The ensuing duality
between semi-classical spinning strings and long gauge theory operators is
briefly reviewed. Strongly coupled thermal SYM theory is explored via a black
hole in 5-dimensional AdS space, which leads to explicit results for its
entropy and shear viscosity. A conjectured universal lower bound on the
viscosity to entropy density ratio, and its possible relation to recent results
from RHIC, are discussed. Finally, some available results on string duals of
confining gauge theories are briefly reviewed.


title:
Effects of Dynamical Quarks on the Stability of Heavy Quarkonia in
  Quark-Gluon Plasma

abstract:
  To study the stability of heavy quarkonia in quark-gluon plasma, we use a
color-singlet Q-Qbar potential determined previously to be a well-defined
linear combination of the free energy F_1 and the internal energy U_1. Using
the lattice gauge results of Kaczmarek et al., the dissociation temperatures of
J/psi and chi_b in quenched QCD are found to be 1.62Tc and 1.18Tc respectively,
in good agreement with spectral function analyses. The dissociation temperature
of J/psi in full QCD with 2 flavors is 1.42Tc. Thus, the presence of dynamical
quarks in full QCD lowers the dissociation temperature of J/psi, but J/psi
remains bound up to 1.42Tc.


title:
Final State Interactions and the Effects of Potentials on Particle
  Reactions

abstract:
  In nuclear physics, it is well known that the electromagnetic (Coulomb)
interaction between final state products can drastically effect particle
reaction rates. Near thresholds, for example, nuclear alpha decay is suppressed
while nuclear beta decay is enhanced by final state Coulomb interactions. Here
we discuss high energy physics enhancement and/or suppression of reactions
wherein the potentials must include weak and strong as well as electromagnetic
interactions. Potentials due to the exchange of gluons and the exchange of a
hypothetical Higgs particle are explicitly considered.


title: Comment on form factor shape and extraction of |V_ub| from B --> pi l nu

abstract:
  We point out that current experimental data for partial B --> pi l nu
branching fractions reduce the theoretical input required for a precise
extraction of |V_ub| to the form factor normalization at a single value of the
pion energy. We show that the heavy-quark expansion provides a bound on the
form factor shape that is orders of magnitude more stringent than conventional
unitarity bounds. We find |V_ub| = (3.7 +/- 0.2 +/- 0.1) x [0.8/F_+(16 GeV^2)].
The first error is from the experimental branching fractions, and the second is
a conservative bound on the residual form factor shape uncertainty, both of
which will improve with additional data. Together with current and future
lattice determinations of the form factor normalization this result gives an
accurate, model independent determination of |V_ub|. We further extract
semileptonic shape observables such as |V_ub F_+(0)| = 0.92 +/- 0.11 +/- 0.03
and show how these observables can be used to test factorization and to
determine low-energy parameters in hadronic B decays.


title: Leptogenesis in Minimal Left-Right Symmetric Models

abstract:
  We analyze lepton asymmetry induced in the decay of right--handed neutrinos
in a class of minimal left--right symmetric models. In these models, which
assume low energy supersymmetry, the Dirac neutrino mass matrix is proportional
to the charged lepton mass matrix. As a result, lepton asymmetry is calculable
in terms of 9 parameters, all measurable in low energy neutrino experiments. By
solving the Boltzmann equations numerically we show that adequate baryon
asymmetry is generated in these models. This however places significant
constraints on the light neutrino parameters. We find tan^2\theta_{12} =
m_1/m_2 and \theta_{13} = (0.01 - 0.07) for the neutrino oscillation angles,
and \beta = \alpha + \pi/2 for the Majorana phases.


title:
Weak Annihilation Topologies and Final State Interactions in D -> PP
  Decays

abstract:
  We study two-body D -> PP decays, assuming that each decay process go through
the bare amplitude followed by elastic SU(3) rescattering, where the bare
amplitude consists of (i) the color-allowed and color-suppressed factorization
amplitudes and (ii) the short-distance weak annihilation amplitudes. We have
performed the \chi^2 fit on 14 branching ratios of D -> PP decays in the
formalism of the above mentioned model. The final state interactions can be
well accounted for by the short-distance annihilation topologies and SU(3)
rescatterings. The two SU(3) rescattering phase differences are \delta \equiv
\delta_{27}-\delta_{8} \simeq -46^\circ and \sigma \equiv
\delta_{27}-\delta_{1} \simeq -21^\circ, where \delta_{27}, \delta_{8} and
\delta_{1}are the rescattering phases of final states corresponding to the
representations 27, 8 and 1, respectively. We find that the D^0 -> K^0
\bar{K}^0 decay occurs mainly due to the nonzero short-distance weak
annihilation effects, originating from SU(3) symmetry-breaking corrections to
the distribution amplitudes of the final-state kaons, but receives tiny effects
from other modes via SU(3) rescattering. Our results are in remarkable
accordance with the current data.


title: Branching ratio of rare decay $B^0(B_s)\to \gamma \nu \bar{\nu}$

abstract:
  The three-body decay $B^0(B_s)\to \gamma\nu \bar{\nu}$ can occur via penguin
and box diagrams in the standard model (SM). These channels are useful to
determine the decay constants $f_B$ ($f_{B_s}$) and $B$ ($B_s$) meson wave
function. Using the B meson wave function determined in hadronic $B (B_s)$
decays, we calculate and get the branching ratio of order $10^{-9}$ and
$10^{-8}$ for $B^0$ and $B_s$ decay, respectively. They agree with previous
calculations.


title:
Flavor Mass and Mixing and S_3 Symmetry -- An S_3 Invariant Model
  Reasonable to All --

abstract:
  We assume that weak bases of flavors (u, c)_{L,R}, (d,s)_{L,R}, (e, \mu)
_{L,R}, (\nu_e, \nu_\mu)_{L,R} are the S_3 doublet and t_{L,R}, b_{L,R},
\tau_{L,R}, {\nu_\tau}_{L,R} are the S_3 singlet and further there are S_3
doublet Higgs (H_D^1, H_D^2) and S_3 singlet Higgs H_S. We suggest an S_3
invariant Yukawa interaction, in which masses caused from the interaction of
S_3 singlet flavors and Higgs is very large and masses caused from interactions
of S_3 doublet flavors and Higgs are very small, and the vacuum expectation
value <|H_D^1|>_0 is rather small compared to the <|H_D^2|>_0. In this model,
we can explain the quark sector mass hierarchy, flavor mixing V_{CKM} and
measure of CP violation naturally. The leptonic sector mass hierarchy and
flavor mixing described by V_{MNS} having one-maximal and one-large mixing
character can also be explained naturally with no other symmetry restriction.
In our model, an origin of Cabibbo angle is the ratio \lambda=<|H_D^1|>_0
/<|H_D^2|>_0 and an origin of CP violation is the phase of H_D^1.


title: Threshold resummed spectra in B -> Xu l nu decays in NLO (II)

abstract:
  We resum to next-to-leading order the distribution in the ratio of the
invariant hadron mass mX to the total hadron energy EX and the distribution in
mX in the semileptonic decays B -> Xu l nu. By expanding our formulas, we
obtain the coefficients of all the infrared logarithms at O(alphaS^2) and of
the leading ones at O(alphaS^3). We explicitly show that the relation between
these semileptonic spectra and the photon spectrum in the radiative decay B ->
Xs gamma is not a purely short-distance one. There are long-distance effects in
the semileptonic spectra which are not completely factorized by the structure
function as measured in the radiative decay and have to be modelled in some
way.


title:
The effect of the location of the new Higgs doublet on the radiative
  lepton flavor violating decays in the split fermion scenario

abstract:
  We study the branching ratios of the lepton flavor violating processes \mu ->
e\gamma, \tau -> e\gamma and \tau -> \mu\gamma in the split fermion scenario,
with the assumption that the new Higgs doublet is restricted to the 4D brane
(thin bulk) in one and two extra dimensions, in the framework of the two Higgs
doublet model. We observe that the branching ratios are sensitive to the
location of the 4D brane and, in the second case, the width of the thin bulk,
especially for the \mu -> e\gamma decay.


title: Left-right asymmetry of nuclear shadowing in charged current DIS

abstract:
  We study the shadowing effect in highly asymmetric diffractive interactions
of left-handed and right-handed W-bosons with atomic nuclei. The target nucleus
is found to be quite transparent for the charmed-strange Fock component of the
light-cone W^+ in the helicity state \lambda=+1 and rather opaque for the c\bar
s dipole with \lambda=-1. The shadowing correction to the structure function
\Delta xF_3 = xF_3^{\nu N}-xF_3^{\bar\nu N} extracted from \nu Fe and \bar\nu
Fe data is shown to make up about 20% in the kinematical range of CCFR/NuTeV.


title: Neutrinoless Double $\beta$-Decay: Status and Future

abstract:
  A brief summary of the status of neutrino masses, mixing and oscillations is
presented. Neutrinoless double $\beta$-decay is considered. Predictions for the
effective Majorana mass are reviewed. A possible test of the calculations of
nuclear matrix elements of the $0\nu\beta\beta$-decay is proposed.


title: News from polarized e- and e+ at the ILC

abstract:
  The proposed International Linear Collider (ILC) is well-suited for
discovering physics beyond the Standard Model and for precisely unravelling the
structure of the underlying physics. The physics return of the ILC can be
maximized by the use of polarized beams, in particular the simultaneous
polarization of the e- and the e+ beam. Ongoing physics studies are accompanied
by active R&D on the machine part for generating polarized beams and for
measuring the polarization with high precision at the ILC. Some new results on
the physics case and on the technical aspects of the polarization of both beams
are briefly summarized.


title:
Transverse momentum resummation for Higgs boson produced via bb-bar
  fusion at hadron colliders

abstract:
  We study the impact of initial-state multiple parton radiation on transverse
momentum $(q_T)$ distribution of Higgs boson produced via bottom quark fusion
at hadron colliders. The shape of the resulting $q_T$ distribution is affected
by the bottom-quark mass corrections and by the strong kinematical behavior of
the bottom-quark parton density. We account for both features in the full range
of $q_T$. To do this, we formulate the resummation calculation in a
general-mass factorization (S-ACOT) scheme and introduce a correction in the
resummed-term to account for the effect from large-$q_T$ kinematics of Higgs
boson. The results of this resummation are compared to fixed-order and PYTHIA
predictions.


title:
Coherent Vector Meson Photo-Production from Deuterium at Intermediate
  Energies

abstract:
  We analyze the cross section for vector meson photo-production off a deuteron
for the intermediate range of photon energies starting at a few GeVs above the
threshold and higher. We reproduce the steps in the derivation of the
conventional non-relativistic Glauber expression based on an effective
diagrammatic method while making corrections for Fermi motion and intermediate
energy kinematic effects. We show that, for intermediate energy vector meson
production, the usual Glauber factorization breaks down and we derive
corrections to the usual Glauber method to linear order in longitudinal nucleon
momentum. The purpose of our analysis is to establish methods for probing
interesting physics in the production mechanism for phi-mesons and heavier
vector mesons. We demonstrate how neglecting the breakdown of Glauber
factorization can lead to errors in measurements of basic cross sections
extracted from nuclear data.


title:
Testing the Structure of the Scalar Meson $K_0^*(1430)$ in $\tau\to
  K_0^*(1430)\nu$ Decay

abstract:
  The decay constant of $K_0^*(1430)$ is the key quantity to determine the
production rate of $K_0^*(1430)$ in $\tau$ decays. By assuming $K_0^*(1430)$ is
the lowest scalar bound state of $s\bar{q}$, the decay constant can be
calculated reliably in QCD sum rule. Then the decay branching ratio of $\tau\to
K_0^*(1430)\nu$ is predicted to be about $(7.9\pm 3.1)\times 10^{-5}$. If this
branching ratio can be measured by experiment, it should be helpful to make
clear the structure of $K_0^*(1430)$.


title:
Semileptonic Decay of $B$ and $D\to K^*_0(1430) \bar{\ell}\nu$ From QCD
  Sum Rule

abstract:
  We calculate $B_{(s)}$, and $D_{(s)}$ to $K^*_0(1430)$ transition form
factors, and study semileptonic decays of $B_{(s)}$ and $D_{(s)}\to K_0^*(1430)
\bar{\ell}\nu$ based on QCD sum rule. Measuring these semileptonic decays with
high statistics will give valuable information on the nature of light scalar
mesons.


title: Phenomenological study of two-meson couplings of Theta+

abstract:
  We evaluate two-meson couplings of Theta+, using experimental information of
nucleon resonances decaying into pi pi N channels, in which the two pions are
in scalar- and vector-type correlations. We examine two assignments of spin and
parity of J^P=1/2^+ and 3/2^-, for which the experimental spectra of known
resonances with exotic baryons are properly reproduced by an octet-antidecuplet
representation mixing scheme. With the obtained coupling constants, total cross
sections of the reactions pi- p -> K- Theta+ and K+ p -> pi+ Theta+ are
calculated. Substantial interference of two terms may occur in the reaction
processes for the J^P=1/2^+ case, whereas the interference effect is rather
small for the 3/2^- case.


title: Neutralino Dark Matter in 2005

abstract:
  I summarize some recent work on supersymmetric neutralinos as candidates for
cold Dark Matter in the Universe. This includes a new scan of mSUGRA parameter
space, with special emphasis on neutralinos annihilating predominantly through
exchange of the light CP--even Higgs boson, and on bounds on sparticle masses.
Next, prospects of testing models with TeV higgsino--like Dark Matter at
colliders are discussed. Finally, I briefly comment on extensions of the mSUGRA
model, and on scenarios with non--standard cosmology.


title: The Problem of Mass: Mesonic Bound States Above Tc

abstract:
  By extending the Bielefeld LGS (Lattice Gauge Simulation) color singlet
interaction, we find that the masses of pi, sigma, rho and a_1 excitations, 32
degrees of freedom in all, go to zero (in the chiral limit) as T -> T_c. This
result indicates a smooth phase transition at T_c, at which from above the
masses and couplings of mesons vanish `a la Brown-Rho scaling. We discuss that
our scenario successfully explains the STAR (STAR Collaboration) rho^0/pi^-
ratio in Au-Au peripheral collisions at RHIC.


title: Azimuthal dependence in diffractive processes

abstract:
  Azimuthal distributions in high-energy processes give information about the
helicity structure of diffractive reactions. I discuss predictions of several
dynamical mechanisms in this context, both for electron-proton and for
hadron-hadron collisions.


title: Rapidity equilibration in d + Au and Au + Au systems

abstract:
  In a Relativistic Diffusion Model (RDM), the evolution of net-proton rapidity
spectra with sqrt(s_NN) in heavy systems is proposed as an indicator for local
equilibration and longitudinal expansion. The broad midrapidity valley recently
discovered at RHIC in central Au + Au collisions at sqrt(s_NN)= 200 GeV
suggests rapid local equilibration which is most likely due to deconfinement,
and fast longitudinal expansion. Rapidity spectra of produced charged hadrons
in d + Au and Au + Au systems at RHIC energies and their centrality dependence
are well described in a three-sources RDM. In central collisions, about 19 % of
the produced particles are in the equilibrated midrapidity region for d + Au.


title: Technifermion Representations and Precision Electroweak Constraints

abstract:
  We discuss the selection of fermion representations in technicolor models
with a view toward minimizing technicolor contributions to the precision
electroweak $S$ parameter. We present and analyze models that involve one
technifermion SU(2)$_L$ doublet with standard-model singlet technifermion
sectors that lead to walking behavior, which further reduces $S$. We also
consider models that have technifermions in higher-dimensional representations
and study embeddings in extended technicolor theories.


title: Ideal Fermion Delocalization in Five Dimensional Gauge Theories

abstract:
  We discuss ideal delocalization of fermions in a bulk SU(2) x SU(2) x U(1)
Higgsless model with a flat or warped extra dimension. So as to make an extra
dimensional interpretation possible, both the weak and hypercharge properties
of the fermions are delocalized, with the U(1)_Y current of left-handed
fermions being correlated with the SU(2)_W current. We find that (to subleading
order) ideal fermion delocalization yields vanishing precision electroweak
corrections in this continuum model, as found in corresponding theory space
models based on deconstruction. In addition to explicit calculations, we
present an intuitive argument for our results based on Georgi's spring analogy.
We also discuss the conditions under which the essential features of an SU(2) x
SU(2) x U(1) bulk gauge theory can be captured by a simpler SU(2) x SU(2)
model.


title:
More on a possible energy dependence of Theta_13 in vacuum neutrino
  oscillations

abstract:
  Vacuum neutrino-oscillation probabilities from a simple three-flavor model
with both mass-square differences and timelike Fermi-point splittings have been
presented in a previous article [hep-ph/0504274]. Here, further results are
given: first, for specific parameters relevant to MINOS in the low-energy mode
and, then, for arbitrary parameters. A generalized model with equidistant
Fermi-point splittings and an additional complex phase is also discussed. If
relevant, this generalized model might have interesting effects at future
long-baseline oscillation experiments.


title: Properties of the Lightest Neutralino in MSSM Extensions

abstract:
  We study neutralino sectors in extensions of the MSSM that dynamically
generate the mu-term. The extra neutralino states are superpartners of the
Higgs singlets and/or additional gauge bosons. The extended models may have
distinct lightest neutralino properties which can have important influences on
their phenomenology. We consider constraints on the lightest neutralino from
LEP, Tevatron, and (g-2)_mu measurements and the relic density of the dark
matter. The lightest neutralino can be extremely light and/or dominated by its
singlino component, which does not couple directly to SM particles except Higgs
doublets.


title: Experimental determination of the effective strong coupling constant

abstract:
  We present a first attempt to experimentally extract an effective strong
coupling constant that we define to be a low Q2 extension of a previous
definition by S. Brodsky et al. following an initial work of G. Grunberg. Using
Jefferson Lab data and sum rules, we establish its Q2-behavior over the
complete Q2-range. The result is compared to effective coupling constants
inferred from different processes and to calculations based on Schwinger-Dyson
equations, hadron spectroscopy or lattice QCD. Although the connection between
the experimentally extracted effective coupling constants and the calculations
is not established it is interesting to note that their behaviors are similar.


title: From confining fields back to power corrections

abstract:
  We overview the issue of the power corrections to the parton model, mostly
within the context of QCD sum rules. There are a few sources of the power
corrections responsible for various qualitative effects. The basic idea that
the power corrections are related to confining fields seems to be realized in
case of $1/Q^2$ corrections which are dual to high orders of perturbation
theory. The evidence comes from lattice studies of the confinement which
allowed to identify the confining field configurations as monopoles and
vortices. We comment also on the role of the condensate of dimension two,
$<(A_{\mu}^a)^2>_{min}$.


title:
Fermion self-energies and pole masses at two-loop order in a general
  renormalizable theory with massless gauge bosons

abstract:
  I present the two-loop self-energy functions and pole masses for fermions in
an arbitrary renormalizable field theory, in the approximation that vector
bosons are treated as massless. The calculations are done simultaneously in the
mass-independent \bar{MS}, \bar{DR}, and \bar{DR}' renormalization schemes,
with a general covariant gauge fixing, and treating Majorana and Dirac fermions
in a unified way. As examples, I discuss the two-loop strong interaction
corrections to the gluino, neutralino, chargino, and quark pole masses in
minimal supersymmetry. All other two-loop contributions to the fermion pole
masses in softly broken supersymmetry can also be obtained as special cases of
the results given here, neglecting only the electroweak symmetry breaking scale
compared to larger mass scales in two-loop diagrams that involve W or Z bosons.


title: Gauge principle and QED

abstract:
  One of the major developments of twentieth century physics has been the
gradual recognition that a common feature of the known fundamental interactions
is their gauge structure. In this talk the early history of gauge theory is
reviewed, emphasizing especially Weyl's seminal contributions of 1918 and 1929.


title: Next to Minimal Flavor Violation

abstract:
  The flavor structure of a wide class of models, denoted as next to minimal
flavor violation (NMFV), is considered. In the NMFV framework, new physics
(NP), which is required for stabilization of the electroweak symmetry breaking
(EWSB) scale, naturally couples (dominantly) to the third generation quarks and
is quasi-aligned with the Yukawa matrices. Consequently, new sources of flavor
and CP violation are present in the theory, mediated by a low scale of few TeV.
However, in spite of the low flavor scale, the most severe bounds on the scale
of NP are evaded since these are related to flavor violation in the first two
generations. Instead, one typically finds that the NP contributions are
comparable in size to SM loop processes. We argue that, in spite of the
successful SM unitary triangle fit and contrary to the common lore, such a
sizable contribution to Delta F=2 processes of ~ 40% (with arbitrary phase)
compared to SM is presently allowed since B-factories are only beginning to
constrain these models. Thus, it is very interesting that in the NMFV models
one is not forced to separate the scale of NP related to EWSB and the scale of
flavor violation. We show briefly that this simple setup includes a wide class
of supersymmetric and non-supersymmetric models all of which solve the
hierarchy problem. We further discuss tests related to Delta F=1 processes, in
particular the ones related to b -> s transition. The b -> s processes are
computed using two different hadronic models to estimate the uncertainties
involved. In addition, we derive constraints on the NP from B -> Kpi data using
only SU(3) flavor symmetry and minimal dynamical assumptions. Finally we argue
that in many cases correlating Delta F=2 and Delta F=1 processes is a powerful
tool to probe our framework.


title: The Abundance of Kaluza-Klein Dark Matter with Coannihilation

abstract:
  In Universal Extra Dimension models, the lightest Kaluza-Klein (KK) particle
is generically the first KK excitation of the photon and can be stable, serving
as particle dark matter. We calculate the thermal relic abundance of the KK
photon for a general mass spectrum of KK excitations including full
coannihilation effects with all (level one) KK excitations. We find that
including coannihilation can significantly change the relic abundance when the
coannihilating particles are within about 20% of the mass of the KK photon.
Matching the relic abundance with cosmological data, we find the mass range of
the KK photon is much wider than previously found, up to about 2 TeV if the
masses of the strongly interacting level one KK particles are within five
percent of the mass of the KK photon. We also find cases where several
coannihilation channels compete (constructively and destructively) with one
another. The lower bound on the KK photon mass, about 540 GeV when just
right-handed KK leptons coannihilate with the KK photon, relaxes upward by
several hundred GeV when coannihilation with electroweak KK gauge bosons of the
same mass is included.


title:
Precise Calculation of the Relic Density of Kaluza-Klein Dark Matter in
  Universal Extra Dimensions

abstract:
  We revisit the calculation of the relic density of the lightest Kaluza-Klein
particle (LKP) in the model of Universal Extra Dimensions. The Kaluza-Klein
(KK) particle spectrum at level one is rather degenerate, and various
coannihilation processes may be relevant. We extend the calculation of
hep-ph/0206071 to include coannihilation processes with all level one KK
particles. In our computation we consider a most general KK particle spectrum,
without any simplifying assumptions. In particular, we do not assume a
completely degenerate KK spectrum and instead retain the dependence on each
individual KK mass. As an application of our results, we calculate the
Kaluza-Klein relic density in the Minimal UED model, turning on coannihilations
with all level one KK particles. We then go beyond the minimal model and
discuss the size of the coannihilation effects separately for each class of
level 1 KK particles. Our results provide the basis for consistent relic
density computations in arbitrarily general models with Universal Extra
Dimenions.


title:
pp Elastic Scattering in Near Forward Direction at LHC and Nucleon
  Structure

abstract:
  We predict pp elastic differential cross section at LHC at the c.m. energy 14
TeV and momentum transfer range |t| = 0-10 GeV*2, which is planned to be
measured by the TOTEM group. The field theory model underlying our
phenomenological investigation describes the nucleon as a composite object with
an outer cloud of quark-antiquark condensate, an inner core of topological
baryonic charge, and a still smaller quark-bag of valence quarks. The model
satisfactorily describes the asymptotic behavior of sigma-total(s) and rho(s)
as well as the measured antiproton-proton elastic differential cross section at
c.m. energies 546 GeV, 630 GeV, and 1.8 TeV. The large |t| elastic amplitude of
the model incorporates the QCD hard pomeron (BFKL Pomeron plus next to leading
order approximations), the perturbative dimensional counting behavior, and the
confinement of valence quarks in a small region within the nucleon. Our
predicted pp elastic differential cross section at LHC is compared with those
of Bourrely et al. and Desgrolard et al.


title:
Gravitino Production in the Early Universe and Its Implications to
  Particle Cosmology

abstract:
  Effects of the unstable gravitino on the big-bang nucleosynthesis (BBN) and
its implications to particle cosmology are discussed. If the gravitino mass is
smaller than \sim 20 TeV, lifetime of the gravitino becomes longer than \sim
1sec and its decay may spoil the success of the standard BBN. In order to avoid
such a problem, upper bound on the reheating temperature after the inflation is
obtained, which may be as low as \sim 10^{5-6} GeV. For a successful
baryogenesis with such low reheating temeprature, a consistent scenario based
on the large cutoff supergravity (LCSUGRA) hypothesis of supersymmetry
breaking, where the gravitino and sfermion become as heavy as \sim O(1-10 TeV),
is proposed. In the LCSUGRA, non-thermal leptogenesis can produce large enough
baryon asymmetry. We also see that, in the LCSUGRA scenario, relic density of
the lightest superparticle becomes consistent with the WMAP value of the dark
matter density in the parameter region required for the successful non-thermal
leptogenesis. In this case, the dark matter density may be reconstructed with
the future e^+e^- linear collider.


title:
Stability of Subsequent-to-Leading-Logarithm Corrections to the
  Effective Potential for Radiative Electroweak Symmetry Breaking

abstract:
  We demonstrate the stability under subsequent-to-leading logarithm
corrections of the quartic scalar-field coupling constant $\lambda$ and the
running Higgs boson mass obtained from the (initially massless) effective
potential for radiatively broken electroweak symmetry in the
single-Higgs-Doublet Standard Model. Such subsequent-to-leading logarithm
contributions are systematically extracted from the renormalization group
equation considered beyond one-loop order. We show $\lambda$ to be the dominant
coupling constant of the effective potential for the radiatively broken case of
electroweak symmetry. We demonstrate the stability of $\lambda$ and the running
Higgs boson mass through five orders of successively subleading logarithmic
corrections to the scalar-field-theory projection of the effective potential
for which all coupling constants except the dominant coupling constant
$\lambda$ are disregarded. We present a full next-to-leading logarithm
potential in the three dominant Standard Model coupling constants
($t$-quark-Yukawa, $\alpha_s$, and $\lambda$) from these coupling constants'
contribution to two loop $\beta$- and $\gamma$-functions. Finally, we
demonstrate the manifest order-by-order stability of the physical Higgs boson
mass in the 220-231 GeV range. In particular, we obtain a 231 GeV physical
Higgs boson mass inclusive of the $t$-quark-Yukawa and $\alpha_s$ coupling
constants to next-to-leading logarithm order, and inclusive of the smaller
$SU(2)\times U(1)$ gauge coupling constants to leading logarithm order.


title: Radiative Corrections to the Neutrino-Deuteron Reactions

abstract:
  The $O(\alpha)$ QED and electroweak radiative corrections to neutrino
deuteron reactions is investigated with particular emphasis given to the
constant terms, which have not been treated properly in the literature. This
problem is related to the definition of the axial-vector coupling constant
$g_{A}$ as to the inclusion of radiative corrections. After proper calculations
of the constants for the Fermi and Gamow-Teller transitions, we find the
radiative correction to the neutral current induced reaction, with the usually
adopted definition of $g_{A}$, is 1.017 for the Higgs boson mass $m_{H}=1.5
m_{Z}$. This value is close to that given by Kurylov et al., but this is due to
an accidental cancellation of the errors, between those caused by putative
identification of constant terms for the Fermi and Gamow-Teller transitions for
the charged current reactions and minor errors in their treatment of the
constant terms for the neutral current induced reactions.


title: Neutrino flavor mixing in an SU(3) symmetry for light neutrinos

abstract:
  It is proposed that light neutrinos form a triplet in a global SU(3) flavor
symmetry. Within this framework, a symmetry principle predicts sin^2
theta_{23}=0.5 and gives the so called inverted neutrino mass hierarchy, theta
_{13}=0 and a small deviation from pi/4 for theta_{12}.


title:
Using SU(3) Flavor to Constrain the CP Asymmetries in $B \to PP,VP,VV$
  Decays involving $b \to s$ Transitions

abstract:
  We use the approximate SU(3) flavor symmetry of the strong interaction to put
bounds on the CP asymmetries in $b \to s$ decays of the $B^0_d$ and $B^+_u$
mesons. We extend the work of \cite{Grossman:2003qp} to include all relevant $B
\to PP$, $B \to VP$ and $B \to VV$ decays. We obtain the strongest constraints
from current data, and provide a list of SU(3) relations which can be used when
future data is obtained.


title: Binary systems in QM and in QFT: CPT

abstract:
  Quasi-degenerate neutral systems like a (K, \bar{K}) type are investigated in
Quantum Field Theory (QFT). A constant mass matrix as the one used in Quantum
Mechanics (QM) can only be introduced as a linear approximation to QFT. We
study the phenomenological consequences of the differences between the QFT and
QM treatments. The role of ``spurious'' states with zero norm at the poles is
emphasized. The K_L-K_S mass splitting triggers a tiny difference between the
CP violating parameters \epsilon_L and \epsilon_S, without any violation of
TCP. Non-vanishing semi-leptonic asymmetry delta_S - \delta_L does not signal
TCP violation (usual claims not withstanding), while A_{TCP} keeps vanishing
when TCP is good symmetry.


title:
Next-to-leading order QCD jet production with parton showers and
  hadronization

abstract:
  We report on a method for matching the next-to-leading order calculation of
QCD jet production in e+e- annihilation with a Monte Carlo parton shower event
generator (MC) to produce realistic final states. The final result is accurate
to next-to-leading order (NLO) for infrared-safe one-scale quantities, such as
the Durham 3-jet fraction y_3, and agrees well with parton shower results for
multi-scale quantities, such as the jet mass distribution in 3-jet events. For
our numerical results, the NLO calculation is matched to the event generator
Pythia, though the method is more general. We compare one scale and multi-scale
quantities from pure NLO, pure MC, and matched NLO-MC calculations.


title: Supersymmetry Breaking, Extra Dimensions and Neutralino Dark Matter

abstract:
  We show some phenomenological implications for the dark matter problem of a
class of models with deflected anomaly mediated supersymmetry breaking in the
context of the MSSM. This scenario can be naturally embedded in a brane world
model with one compactified extra dimension. It turns out that in these models
the neutralino is still the LSP and so a good candidate as cold dark matter. We
found that the neutralino is quite a pure bino in almost all the parameter
space. Moreover we computed the thermal relic density and we found wide
cosmologically allowed regions for the neutralino.


title: The collective quantization of three-flavored Skyrmions revisited

abstract:
  A self-consistent large $N_c$ approach is developed for the collective
quantization of SU(3) flavor hedgehog solitons, such as the Skyrmion. The key
to this analysis is the determination of all of the zero modes associated with
small fluctuations around the hedgehog. These are used in the conventional way
to construct collective coordinates. This approach differs from previous work
in that it does not implicitly assume that each static zero mode is associated
with a dynamical zero mode. It is demonstrated explicitly in the context of the
Skyrmion that there are fewer dynamical zero modes than static ones due to the
Witten-Wess-Zumino term in the action. Group-theoretic methods are employed to
identify the physical states resulting from canonical quantization of the
collectively rotating soliton. The collective states fall into representations
of SU(3) flavor labeled by $(p,q)$ and are given by $(2J, \frac{Nc}{2} -J)$
where $J={1/2},{3/2},... $ is the spin of the collective state. States with
strangeness $S > 0$ do not arise as collective states from this procedure; thus
the $\theta^{+}$ (pentaquark) resonance does not arise as a collective
excitation in models of this type.


title:
Study of perturbative QCD predictions at next-to-leading order and
  beyond for \pp -> H -> gamma gamma + X

abstract:
  We study predictions from perturbative Quantum Chromodynamics (QCD) for the
process pp -> H -> gamma gamma + X. In particular, we compare fully
differential calculations at next-to-leading (NLO) and next-to-next-to-leading
order (NNLO) in the strong coupling constant to the results obtained with the
MC@NLO Monte Carlo (MC) generator, which combines QCD matrix elements at NLO
with a parton shower algorithm. Estimates for the systematic uncertainties in
the various predictions due to the choice of the renormalization scale and the
parton distribution functions are given for the inclusive and accepted cross
sections and for the corresponding acceptance corrections, obtained after
applying standard selection and acceptance cuts. Furthermore, we compare the
distributions for the Higgs signal to those for the irreducible two-photon
background, obtained with a NLO MC simulation.


title: Diquark-Antidiquark with open charm in QCD sum rules

abstract:
  Using the QCD sum rule approach we investigate the possible four-quark
structure of the recently observed charmed scalar mesons $D_0^{0}(2308)$
(BELLE) and $D_0^{0,+}(2405)$ (FOCUS) and also of the very narrow
$D_{sJ}^{+}(2317)$, firstly observed by BABAR. We use diquak-antidiquark
currents and work to the order of $m_s$ in full QCD, without relying on $1/m_c$
expansion. Our results indicate that a four-quark structure is acceptable for
the resonances observed by BELLE and BABAR: $D_0^{0}(2308)$ and
$D_{sJ}^{+}(2317)$ respectively, but not for the resonances observed by FOCUS:
$D_0^{0,+}(2405)$.


title:
Similarity of the gravitational contributions to anomalous magnetic
  moment

abstract:
  A precise measurement of a muon $(g-2)$ experiment recently reported a
deviation from the Standard Model. This implies the need to an extension of the
model and suggests underlying mechanisms. We hypothesize that the influence of
higher dimensional gravity causes this $(g-2)$ deviation. This effect would
appear as Kaluza-Klein modes and Nambu-Goldstone modes on a 3-brane. These
classical effects produce new contributions to the magnetic moment. In this
paper, we perform a consistency check by comparing the results derived from the
Born and Schr{\"o}dinger approximations. This comparison reveals a similarity
between KK-dilaton modes and the brane stretching effect.


title: Focus talk on interactions between jets and medium

abstract:
  The energy and momentum lost by a hard parton propagating through hot and
dense matter has to be redistributed during the nuclear medium evolution. Apart
from heating the medium, there is the possibility that collective modes are
excited leading to the emergence of Mach cones or Cherenkov radiation. Recent
two-particle correlation measurements by STAR \cite{Wang:2004kf} and PHENIX
\cite{Adler:2005ee} at RHIC indicate that such phenomena may play an important
role in understanding the jet-medium interactions. Possible collective modes
are discussed and it is demonstrated that Mach cones as created by colorless or
colored sound are a possible explanation of the hardronic two-particle
correlation data.