title: On vortices and rings in extended Abelian models

abstract:
  A numerical search for straight superconducting vortices in a U(1) model with
a Ginzburg-Landau potential containing a cubic term, is presented. Such
vortices exist in a small numerically determined region. The reasons of their
existence in that narrow region of the parameter space, as well as of their
instability in the rest of the parameter space, are explained. Then, the
results of a numerical search for axially symmetric solitons in a U(1)\times
U(1) model with higher derivative terms, which is based on Physica D 228 (2007)
159, are presented and discussed.


title:
NNLO Logarithmic Expansions and Precise Determinations of the Neutral
  Currents near the Z Resonance at the LHC: The Drell-Yan case

abstract:
  We present a comparative study of the invariant mass and rapidity
distributions in Drell-Yan lepton pair production, with particular emphasis on
the role played by the QCD evolution. We focus our study around the Z resonance
($50 <Q < 200$ GeV) and perform a general analysis of the
factorization/renormalization scale dependence of the cross sections, with the
two scales included both in the evolution and in the hard scatterings. We also
present the variations of the cross sections due to the errors on the parton
distributions (pdf's) and an analysis of the corresponding $K$-factors.
Predictions from several sets of pdf's, evolved by MRST and Alekhin are
compared with those generated using \textsc{Candia}, a NNLO evolution program
that implements the theory of the logarithmic expansions, developed in a
previous work. These expansions allow to select truncated solutions of varying
accuracy using the method of the $x$-space iterates. The evolved parton
distributions are in good agreement with other approaches. The study can be
generalized for high precision searches of extra neutral gauge interactions at
the LHC.


title: Magnetic strings as part of Yang-Mills plasma

abstract:
  Magnetic strings are defined as infinitely thin surfaces which are closed in
the vacuum and can be open on an external monopole trajectory (that is, defined
by 't Hooft loop). We review briefly lattice data on the magnetic strings which
refer mostly to SU(2) and SU(3) pure Yang-Mills theories and concentrate on
implications of the strings for the Yang-Mills plasma. We argue that magnetic
strings might be a liquid component of the Yang-Mills plasma and suggest tests
of this hypothesis.

categories: hep-ph cond-mat.other hep-lat hep-th physics.plasm-ph


title: Decuplet contribution to the meson-baryon scattering lengths

abstract:
  We calculate decuplet contributions to the s-wave pseudoscalar meson
octet-baryon scattering lengths to the third order in heavy baryon chiral
perturbation theory (HB$\chi$PT). Using experimental pion-nucleon and
kaon-nucleon scattering lengths as inputs, we determine low-energy constants
and predict other meson-baryon scattering lengths. Numerically we consider
three cases: (1) the case with only baryon octet contributions; (2) with
decuplet contributions and (3) in the large N_c limit. Hopefully, the
analytical expressions and the predictions are helpful to future investigations
of the meson-baryon scattering lengths.


title:
Retrofitted Gravity Mediation without the Gravitino-overproduction
  Problem

abstract:
  We propose a retrofitted gravity mediation model which alleviates the
gravitino overproduction from decays of an inflaton and a supersymmetry
breaking field. In the model, we introduce an approximate U(1) symmetry under
which the supersymmetry breaking field is charged, although it is broken by a
mass term of messenger fields to generate gaugino masses of order the weak
scale. In a low-scale inflation model, we find regions in which the gravitino
overproduction problem is avoided.


title:
Helicity amplitudes and crossing relations for antiproton proton
  reactions

abstract:
  Antiproton proton annihilation reactions allow unique access to the moduli
and phases of nucleon electromagnetic form factors in the time like region. We
present the helicity amplitudes for the unequal mass single photon reaction $p
\bar{p}\to l^+ l^-$ in the s channel including the lepton mass. The relative
signs of these amplitudes are determined using simple invariance properties.
Helicity amplitudes for the annihilation reaction $p \bar{p} \to N \bar{N}$ are
also given, where $N$ is any spinor particle with structure. Crossing relations
between the $e p \to e p$ scattering and the $p \bar{p}\to l^+ l^-$
annihilation channels are discussed and the crossing matrix for the helicity
amplitudes is given. This matrix may be used to verify known expressions for
the space like helicity amplitudes due to one photon exchange.


title: Study of $B\to p\bar{p}K^*$ and $B\to p\bar{p}\rho$

abstract:
  We study the three-body baryonic B decays of $B\to p\bar{p}(K^{*},\rho)$ in
the standard model. The baryonic matrix elements are calculated in terms of the
SU(3) flavor symmetry and the QCD power counting rules within the the
perturbative QCD. We find that the decay branching ratios, angular and direct
CP asymmetries of ($B^{-}\to p\bar{p}K^{*-}, \bar{B}^{0}\to p\bar{p}K^{*0},
B^{-}\to p\bar{p}\rho^{-}$) are around $(6,1,30)\times 10^{-6}$, $(13,-27,11)%$
and $(22,1,-3)%$, which are consistent with the current BaBar and Belle data,
respectively. The large values of the branching ratio in $B^{-}\to
p\bar{p}\rho^{-}$ and the direct CP asymmetry in $B^{\pm}\to p\bar{p}K^{*\pm}$
are useful to test the standard model and search for new physics.


title: Determination of fragmentation functions and their uncertainties

abstract:
  Fragmentation functions and their uncertainties are determined for pion,
kaon, and proton by a global $\chi^2$ analysis of charged-hadron production
data in electron-positron annihilation and by the Hessian method for error
estimation. It is especially important that the uncertainties of the
fragmentation functions are estimated in this analysis. The results indicate
that the fragmentation functions, especially gluon and light-quark
fragmentation functions, have large uncertainties at small $Q^2$. There are
large differences between widely-used functions by KKP (Kniehl, Kramer, and
P\"otter) and Kretzer; however, they are compatible with each other and also
with our functions if the uncertainties are taken into account. We find that
determination of the fragmentation functions is improved in
next-to-leading-order (NLO) analyses for the pion and kaon in comparison with
leading-order ones. Such a NLO improvement is not obvious in the proton. Since
the uncertainties are large at small $Q^2$, the uncertainty estimation is very
important for analyzing hadron-production data at small $Q^2$ or $p_T$ ($Q^2,
p_T^2 << M_Z^2$) in lepton scattering and hadron-hadron collisions. A code is
available for general users for calculating obtained fragmentation functions.


title:
Z-boson as "the standard candle" for high precision W-boson physics at
  LHC

abstract:
  In this paper we propose a strategy for measuring the inclusive W-boson
production processes at LHC. This strategy exploits simultaneously the unique
flexibility of the LHC collider in running variable beam particle species at
variable beam energies, and the configuration flexibility of the LHC detectors.
We propose their concrete settings for a precision measurement of the Standard
Model parameters. These dedicated settings optimise the use of the Z boson and
Drell-Yan pair production processes as ``the standard reference candles''. The
presented strategy allows to factorise and to directly measure those of the QCD
effects which affect differently the W and Z production processes. It reduces
to a level of 10^{-4} the impact of uncertainties in the partonic distribution
functions (PDFs) and in the transverse momentum of the quarks on the
measurement precision. Last but not the least, it reduces by a factor of 10 an
impact of systematic measurement errors, such as the energy scale and the
measurement resolution, on the W-boson production observables.


title: Theoretical issues with $\Delta S$ in three-body B decays

abstract:
  Theoretical uncertainties with the time-dependent CP asymmetries $\Delta S$
and $A_{\rm CP}$ in $B^0\to K^+K^-K_S$, $K_SK_SK_S$ and $K_S\pi^0\pi^0$ decays
are discussed. In order to have a reliable estimate of CP asymmetries, it is
very crucial to understand the underlying mechanism for the nonresonant
background which dominates the KKK modes.


title:
Quark spectrum above the critical temperature from Schwinger-Dyson
  equation

abstract:
  We investigate a spectrum of a fermion, which we call a quark, above the
critical temperature of the chiral phase transition in a gauge theory using the
Schwinger-Dyson (SD) equation. The SD equation enables us to study the spectrum
over a wide range of the gauge coupling. It is shown that the quark spectrum
has two sharp peaks which correspond to the normal quasi-quark and the plasmino
and is consistent with that obtained in the hard thermal loop approximation in
the weak coupling region, while it has also two peaks but with smaller thermal
masses and broader widths in the strong coupling region. Temperature-dependence
of the quark spectrum is also discussed.


title: Density fluctuations in the presence of spinodal instabilities

abstract:
  Density fluctuations resulting from spinodal decomposition in a
non-equilibrium first-order chiral phase transition are explored. We show that
such instabilities generate divergent fluctuations of conserved charges along
the isothermal spinodal lines appearing in the coexistence region. Thus,
divergent density fluctuations could be a signal not only for the critical end
point but also for the first order phase transition expected in strongly
interacting matter. We also compute the mean-field critical exponent at the
spinodal lines. Our analysis is performed in the mean-field approximation to
the NJL model formulated at finite temperature and density. However, our main
conclusions are expected to be generic and model independent.


title: Spontaneous Breakdown of U(1) symmetry in DLCQ without Zero Mode

abstract:
  We show that the spontaneous breakdown of U(1) symmetry in a Higgs model can
be described in discretized light cone formulation even by neglecting zero
mode. We obtain correctly the energy of a ground state with the symmetry
breakdown. We also show explicitly the presence of a Goldstone mode and its
absence when the U(1) symmetry is gauged. In spite of obtaining the favorable
results, we lose a merit in the formulation without zero modes that a naive
Fock vacuum is the true ground state.


title:
\phi\to\pi^0\eta\gamma and \phi\to\pi^0\pi^0\gamma decays and Mixing
  Between Low and High Mass Scalar Mesons

abstract:
  Radiative decays \phi\to\eta\pi^0\gamma and \phi\to\pi^0\pi^0\gamma are
studied assuming that these decays are caused through the intermediate
a_0(980)\gamma and f_0(980)\gamma states, respectively. Fitting the
experimental data of the \eta\pi^0 and \pi^0\pi^0 invariant mass spectrum in
the decays \phi\to\eta\pi^0\gamma and \pi^0\pi^0\gamma, it is shown that the
processes \phi\to a_0\gamma and \phi\to f_0\gamma are dominated by the K^+K^-
loop interaction rather than the contact \phi a_0(f_0)\gamma one both for the
non-derivative and derivative SPP coupling. The experimental data of
\Gamma[\phi\to f_0\gamma]/\Gamma[\phi\to a_0\gamma] predicts that
g_{f_0K\bar{K}}/g_{a_0K\bar{K}} \sim 2. Considering the effects of the mixing
between low mass scalar qq\bar{q}\bar{q} states and high mass scalar q\bar{q}
states to these coupling constants g_{f_0K\bar{K}} and g_{a_0K\bar{K}}, one
suggests that the mixing is rather large.


title: Comment to the review by L. Glozman, hep-ph/0701081

abstract: This is a Comment to the recent review by L. Glozman, hep-ph/0701081


title:
Determination of the s-wave pion-nucleon threshold scattering parameters
  from the results of experiments on pionic hydrogen

abstract:
  We give the conversion equations which lead from experimental values of the
$3p \to 1s$ transition energy in pionic hydrogen and the total width of the
$1s$ level to values of the s-wave threshold scattering parameters for the
processes $\pi^-p \to \pi^-p$ and $\pi^-p \to \pi^0n$ respectively. Using a
three-channel potential model, we then calculate the electromagnetic
corrections to these quantities, which remove the effects of the Coulomb
interaction, the external mass differences and the presence of the $\gamma n$
channel. We give the s-wave scattering parameters obtained from the present
experimental data and these electromagnetic corrections. Finally we discuss the
implications for isospin invariance.


title:
Calculations of meson mass spectra in the model of quasi-independent
  quarks

abstract:
  A method of calculations of meson mass spectra in the framework of the model
of quasi-independent quarks is discussed. Meson mass spectra evaluated with the
help of the Dirac equation with the quasi-Coulombic potential and the
confinement potential, as well as with the help of phenomenological mass
formulae, are presented. Parameters of the quasi-independent quarks model,
which are calulated on the basis of mass values of pseudoscalar and vector
mesons, are given. Possible relations between parameters of the
quasi-independent quarks model and constants of the Standard model of strong
and electroweak interactions are considered.


title:
Reducing the spectral index in F-term hybrid inflation through a
  complementary modular inflation

abstract:
  We consider two-stage inflationary models in which a superheavy scale F-term
hybrid inflation is followed by an intermediate scale modular inflation. We
confront these models with the restrictions on the power spectrum P_R of
curvature perturbations and the spectral index n_s implied by the recent data
within the power-law cosmological model with cold dark matter and a
cosmological constant. We show that these restrictions can be met provided that
the number of e-foldings N_HI* suffered by the pivot scale k_*=0.002/Mpc during
hybrid inflation is appropriately restricted. The additional e-foldings
required for solving the horizon and flatness problems can be naturally
generated by the subsequent modular inflation. For central values of P_R and
n_s, we find that, in the case of standard hybrid inflation, the values
obtained for the grand unification scale are close to its supersymmetric value
M_GUT=2.86 x 10^16 GeV, the relevant coupling constant is relatively large
(0.005-0.14), and N_HI* between about 10 and 21.7. In the case of shifted
[smooth] hybrid inflation, the grand unification scale can be identified with
M_GUT provided that N_HI*=21 [N_HI*=18].


title:
Thermal leptogenesis scenarios in the predictive left-right symmetric
  model

abstract:
  We investigated thermal leptogenesis scenarios in the left-right symmetric
extension of the standard model. In the SO(10) GUT framework, we impose the
D-parity realization below GUT scale. These two conditions makes our model more
restrictive and predictive. In such a case, a D-parity odd singlet in the
4-index antisymmetric tensor representation of SO(10) have a critical role.
This singlet have prospects of causing a very large mass hierarchy between
SU(2)L and SU(2)R triplet scalars.
  We test our model by computing baryogenesis via leptogenesis. The heavy
right-handed neutrinos N's and the SU(2)L triplet scalar can generate the
lepton number asymmetry. Leptogenesis scenarios can be categorized by these
mass scales. If the light neutrinos are Majorana and have a hierarchical mass
spectrum, we can obtain a successful result in leptogenesis through lightest
N-decay. But we found that the normal mass hierarchy of the light neutrinos
conflicts with leptogenesis through triplet-decay.


title:
Sum rules for total cross sections of hadron photoproduction on ground
  state $1/2^+$ octet baryons

abstract:
  Sum rules are derived relating Dirac mean square radii and anomalous magnetic
moments of various couples of the ground state $1/2^+$ octet baryons with the
convergent integral of the difference of hadron photoproduction total
cross-sections on the baryons. The chain of inequalities for corresponding
total cross-sections has been found from those sum rules.


title: Chiral low-energy constants

abstract:
  The progress in determining the coupling constants of mesonic chiral
Lagrangians is reviewed, with emphasis on the work performed in three
successive European Networks (Eurodaphne I and II, Euridice). Reliable
estimates of those constants are essential for making full use of
next-to-next-to-leading-order calculations in chiral perturbation theory. The
precision in the values of the strong coupling constants of O(p^4) has been
increasing steadily over the years. The situation is less satisfactory in the
nonleptonic weak sector where further phenomenological input and more
theoretical work are needed. A lot of progress has recently been achieved for
electromagnetic coupling constants occurring in radiative corrections for
mesonic processes at low energies.


title: SUSY-induced FCNC top-quark processes at the Large Hadron Collider

abstract:
  We systematically calculate various flavor-changing neutral-current top-quark
processes induced by supersymmetry at the Large Hadron Collider, which include
five decay modes and six production channels. To reveal the characteristics of
these processes, we first compare the dependence of the rates for these
channels on the relevant supersymmetric parameters, then we scan the whole
parameter space to find their maximal rates, including all the direct and
indirect current experimental constraints on the scharm-stop flavor mixings. We
find that, under all these constraints, only a few channels, through cg->t at
parton-level and t-> ch, may be observable at the Large Hadron Collider.


title:
Calculation of Massive 2-Loop Operator Matrix Elements with Outer Gluon
  Lines

abstract:
  Massive on-shell operator matrix elements and self-energy diagrams with outer
gluon lines are calculated analytically at $O(\alpha_s^2)$, using Mellin-Barnes
integrals and representations through generalized hypergeometric functions.
This method allows for a direct evaluation without decomposing the integrals
using the integration-by-parts method.


title: Nonperturbative equation of state of quark-gluon plasma

abstract:
  The paper is devoted to the systematic derivation of nonperturbative
thermodynamics of quark-gluon plasma, on the basis of the background
perturbation theory. Vacuum background fields enter only in the form of field
correlators, which are known from lattice and analytic calculations. In the
lowest order in $\alpha_s$ the purely nonperturbative $sQGP$ thermodynamics is
expressed through single quark and gluon lines (single line approximation)
which are interacting nonperturbatively with vacuum fields and with other
lines. Nonperturbative EOS is obtained in terms (of the absolute value) of
fundamental (adjoint) Polyakov loop $L_{fund(adj)}$ and spatial string tension
$\sigma_s(T)$. In the lowest approximation the pressure for quarks (gluons) has
a simple factorized form $P_{q(g)}= P_{SB} L_{fund(adj)} ,$ where $ L_i$
describe the action of vacuum colorelectric fields on particle trajectory.


title:
Supersymmetric large tan(beta) corrections to DeltaM_(d,s) and B_(d,s)
  -> mu+mu- revisited

abstract:
  We point out that in the minimal supersymmetric standard model terms from the
mixing of Higgs and Goldstone bosons which are connected to the renormalization
of tan(beta) via Slavnov-Taylor identities give rise to corrections that do not
vanish in the limit where the supersymmetric particles are much heavier than
the Higgs bosons. These additional contributions have important
phenomenological implications as they can lead to potentially large
supersymmetric effects in DeltaM_d and to a significant increase of DeltaM_s
relative to the standard model prediction for a light pseudoscalar Higgs A0. We
calculate all the missing one-loop pieces and combine them with the known
effective non-holomorphic terms to obtain improved predictions for the
B_(d,s)-anti-B_(d,s) mass differences DeltaM_(d,s) and the branching ratios of
B_(d,s) -> mu+mu- in the large tan(beta) regime of the minimal supersymmetric
standard model with minimal flavor violation.


title:
The Strange Parton Distribution of the Nucleon: Global Analysis and
  Applications

abstract:
  The strangeness degrees of freedom in the parton structure of the nucleon are
explored in the global analysis framework, using the new CTEQ6.5 implementation
of the general mass perturbative QCD formalism of Collins. We systematically
determine the constraining power of available hard scattering experimental data
on the magnitude and shape of the strange quark and anti-quark parton
distributions. We find that current data favor a distinct shape of the strange
sea compared to the isoscalar non-strange sea. A new reference parton
distribution set, CTEQ6.5S0, and representative sets spanning the allowed
ranges of magnitude and shape of the strange distributions, are presented. Some
applications to physical processes of current interest in hadron collider
phenomenology are discussed.


title: Discovery reach for non-standard interactions in a neutrino factory

abstract:
  We study the discovery reach for Non-Standard Interactions (NSIs) in a
neutrino factory experiment. After giving a theoretical, but model-independent,
overview of the most relevant classes of NSIs, we present detailed numerical
results for some of them. Our simulations take into account matter effects,
uncertainties in the neutrino oscillation parameters, systematical errors,
parameter correlations, and degeneracies. We perform scans of the parameter
space, and show that a neutrino factory has excellent prospects of detecting
NSIs originating from new physics at around 1 TeV, which is a scale favored by
many extensions of the standard model. It will also turn out that the discovery
reach depends strongly on the standard and non-standard CP violating phases in
the Lagrangian.


title: $\beta(\phi_1)$ from $ B $ Decays to Charm

abstract:
  The measurement of $\sin {2\beta}$ from $B_d \to J/\psi K_s$ does not resolve
the discrete ambiguities in the angle $\beta$. A measurement of $\cos {2\beta}$
is therefore desirable.This talk is about measuring the CKM angle
$\beta(\phi_1)$ from various B decays to charm final states which also allow us
a measurement of $\cos {2\beta}$.


title: Bell Inequalities in High Energy Physics

abstract:
  We review in this paper the research status on testing the completeness of
Quantum mechanics in High Energy Physics, especially on the Bell Inequalities.
We briefly introduce the basic idea of Einstein, Podolsky, and Rosen paradox
and the results obtained in photon experiments. In the tests of Bell
inequalities in high energy physics, the early attempts of using spin
correlations in particle decays and later on the mixing of neutral mesons used
to form the quasi-spin entangled states are covered. The related experimental
results in K^0 and B^0 systems are presented and discussed. We introduce the
new scheme, which is based on the non-maximally entangled state and proposed to
implement in \phi factory, in testing the Local Hidden Variable Theory. And, we
also discuss the possibility in generalizing it to the tau charm factory.


title: Color Transparency at Low Energies: Predictions for JLAB

abstract:
  The study of color transparency (CT) in elastic electroproduction of vector
mesons off nuclei encounters the problem of the onset of coherence length (CL)
effects. The problem of CT-CL separation arises especially at medium energies,
corresponding to HERMES experiment, when the coherence length is of the order
of the nuclear radius R_A. Only at asymptotic large energies, corresponding to
large CL, l_c >> R_A, the CT-CL mixing can be eliminated. On the other hand,
the net CT effects can be studied in the kinematic range accessible by the CLAS
experiment, since in this case the CL is much smaller than the nuclear radius.
Using light-cone quantum chromodynamics (QCD) dipole formalism we investigate
manifestations of CT effects in electroproduction of vector mesons. Motivated
by expected data from the CLAS experiment at JLab, we predict the A and Q^2
dependence of nuclear transparency for rho^0 mesons produced incoherently off
nuclei. We demonstrate that in the CLAS kinematical region the CL effects are
weak enough to keep the photon energy at such values as to obtain maximal
photon virtualities keeping optimal statistics of the data. This has a clear
advantage in comparison with a standard investigation of net CT effects fixing
CL.


title:
Separation of soft and collinear infrared limits of QCD squared matrix
  elements

abstract:
  We present a simple way of separating the overlap between the soft and
collinear factorization formulae of QCD squared matrix elements. We check its
validity explicitly for single and double unresolved emissions of tree-level
processes. The new method makes possible the definition of helicity-dependent
subtraction terms for regularizing the real contributions in computing
radiative corrections to QCD jet cross sections. This implies application of
Monte Carlo helicity summation in computing higher order corrections.


title: Stau-catalyzed $^6$Li Production in Big-Bang Nucleosynthesis

abstract:
  If the gravitino mass is in the region from a few GeV to a few 10's GeV, the
scalar lepton X such as stau is most likely the next lightest supersymmetry
particle. The negatively charged and long-lived X^- may form a Coulomb bound
state (A X) with a nucleus A and may affect the big-bang nucleosynthesis
through catalyzed fusion process. We calculate a production cross section of
Li6 from the catalyzed fusion (He4 X^-) + d \to Li6 + X^- by solving the
Schr\"{o}dinger equation exactly for three-body system of He4, d, and X. We
utilize the state-of-the-art coupled-channel method, which is known to be very
accurate to describe other three-body systems in nuclear and atomic reactions.
The importance of the use of appropriate nuclear potential and the exact
treatment of the quantum tunneling in the fusion process are emphasized. We
find that the astrophysical S-factor at the Gamow peak corresponding to T=10
keV is 0.038 MeV barn. This leads to the Li6 abundance from the catalyzed
process as Li6|_{CBBN}\simeq 4.3\times 10^{-11} (D/2.8\times 10^{-5})
([n_{X^-}/s]/10^{-16}) in the limit of long lifetime of X. Particle physics
implication of this result is also discussed.


title: On Puzzles and Non-Puzzles in B -> pi pi, pi K Decays

abstract:
  Recently, we have seen interesting progress in the exploration of CP
violation in B^0_d -> pi^+ pi^-: the measurements of mixing-induced CP
violation by the BaBar and Belle collaborations are now in good agreement with
each other, whereas the picture of direct CP violation is still unclear. Using
the branching ratio and direct CP asymmetry of B^0_d -> pi^- K^+, this
situation can be clarified. We predict A_CP^dir(B_d -> pi^+ pi^-) =
-0.24+-0.04, which favours the BaBar result, and extract
gamma=(70.0^{+3.8}_{-4.3})deg, which agrees with the unitarity triangle fits.
Extending our analysis to other B -> pi K modes and B^0_s -> K^+ K^- with the
help of the SU(3) flavour symmetry and plausible dynamical assumptions, we find
that all observables with colour-suppressed electroweak penguin contributions
are measured in excellent agreement with the Standard Model. As far as the
ratios R_{c,n} of the charged and neutral B -> pi K branching ratios are
concerned, which are sizeably affected by electroweak penguin contributions,
our Standard-Model predictions have almost unchanged central values, but
significantly reduced errors. Since the new data have moved quite a bit towards
these results, the "B -> pi K puzzle" for the CP-conserving quantities has been
significantly reduced. However, the mixing-induced CP violation of B^0_d ->
pi^0 K_S does look puzzling; if confirmed by future measurements, this effect
could be accommodated through a modified electroweak penguin sector with a
large CP-violating new-physics phase. Finally, we point out that the
established difference between the direct CP asymmetries of B^+- -> pi^0 K^+-
and B_d -> pi^-+ K^+- appears to be generated by hadronic and not by new
physics.


title:
Polarisation Observables in Antiproton Proton to Lepton Antilepton
  Reactions

abstract:
  The electromagnetic form factors of hadrons as measured both in the space
like and time like domains provide fundamental information on the nucleon
structure and internal dynamics. General expressions, including the lepton
mass, for the spin averaged differential cross section for the annihilation
reaction lepton antilepton to proton antiproton are given, as well as general
formulae for the single and double spin asymmetries. The time reversed reaction
would involve a kinematic factor. We also present general expressions for the
helicity amplitudes for this reaction.


title:
Multi-GeV neutrinos due to neutro anti-neutron oscillation in Gamma-Ray
  Burst Fireballs

abstract:
  The long and short gamma-ray bursts are believed to be produced due to
collapse of massive stars and merger of compact binaries respectively. All
these objects are rich in neutron and the jet outflow from these objects must
have a neutron component in it. By postulating the neutron anti-neutron
oscillation in the gamma-ray burst fireball, we show that, 19-38 GeV neutrinos
and anti-neutrinos can be produced due to annihilation of anti-neutrons with
the background neutrons. These neutrinos and anti-neutrinos will be produced
before the 5-10 GeV neutrinos due to dynamical decoupling of neutrons from the
rest of the fireball. Observation of these neutrinos will shed more light on
the nature of the GRB progenitors and also be a unique signature of physics
beyond the standard model. A possible way of detecting these neutrinos in
future is also discussed.


title:
Superstring standard model from Z_{12-I} orbifold compactification with
  and without exotics, and effective R-parity

abstract:
  We construct a supersymmetric standard model in the context of the $Z_{12-I}$
orbifold compactification of the heterotic string theory. The gauge group is
$SU(3)_c\times SU(2)_L\times U(1)_Y\times U(1)^4\times[SO(10)\times U(1)^3]'$.
We obtain three chiral families, $3\times\{Q,d^c,u^c,L,e^c,\nu^c\}$, and Higgs
doublets. There are numerous neutral singlets many of which can have VEVs so
that low energy phenomenology on Yukawa couplings can be satisfied. In one
assignment (Model E) of the electroweak hypercharge, we obtain the string scale
value of $sin^2\theta_W^0={3/8}$ and another exactly massless {\it exphoton}
(in addition to the photon) coupling to exotic particles only. There are color
triplet and anti-triplet exotics, $\alpha$ and $\bar{\alpha}$, $SU(2)_L$
doublet exotics, $\delta$ and $\bar{\delta}$, and $SU(3)_c\times SU(2)_L$
singlet but $Y={2/3},-{1/3},-{2/3},{1/3}$ exotics, $\xi,\eta,\bar{\xi},
\bar{\eta}$. We show that all these vector-like exotics achieve heavy masses by
appropriate VEVs of neutral singlets. One can find an effective R-parity
between light (electroweak scale) particles so that proton and the LSP can live
sufficiently long. In another assignment (Model S) of the electroweak
hypercharge, there does not appear any exotic particle but
$sin^2\theta_W^0={3/14}$.


title: The Multithreaded version of FORM

abstract:
  We present TFORM, the version of the symbolic manipulation system FORM that
can make simultaneous use of several processors in a shared memory
architecture. The implementation uses Posix threads, also called pthreads, and
is therefore easily portable between various operating systems. Most existing
FORM programs will be able to take advantage of the increased processing power,
without the need for modifications. In some cases some minor additions may be
needed. For a computer with two processors a typical improvement factor in the
running time is 1.7 when compared to the traditional version of FORM. In the
case of computers with 4 processors a typical improvement factor in the
execution time is slightly above 3.


title:
Higher order correction to the neutrino self-energy in a medium and its
  astrophysical applications

abstract:
  We have calculated the 1/M^4 (M the vector boson mass) order correction to
the neutrino self-energy in a medium. The possible application of this higher
order contribution to the neutrino effective potential is considered in the
context of the Early Universe hot plasma and of the cosmological Gamma Ray
Burst fireball. We found that, depending on the medium parameters and on the
neutrino properties (mixing angle and mass square difference) the resonant
oscillation of active to active neutrinos is possible.


title: Unitarity and Bounds on the Scale of Fermion Mass Generation

abstract:
  The scale of fermion mass generation can, as shown by Appelquist and
Chanowitz, be bounded from above by relating it to the scale of unitarity
violation in the helicity nonconserving amplitude for fermion-anti-fermion
pairs to scatter into pairs of longitudinally polarized electroweak gauge
bosons. In this paper, we examine the process t tbar -> W_L W_L in a family of
phenomenologically-viable deconstructed Higgsless models and we show that scale
of unitarity violation depends on the mass of the additional vector-like
fermion states that occur in these theories (the states that are the
deconstructed analogs of Kaluza-Klein partners of the ordinary fermions in a
five-dimensional theory). For sufficiently light vector fermions, and for a
deconstructed theory with sufficiently many lattice sites (that is,
sufficiently close to the continuum limit), the Appelquist-Chanowitz bound can
be substantially weakened. More precisely, we find that, as one varies the mass
of the vector-like fermion for fixed top-quark and gauge-boson masses, the
bound on the scale of top-quark mass generation interpolates smoothly between
the Appelquist-Chanowitz bound and one that can, potentially, be much higher.
In these theories, therefore, the bound on the scale of fermion mass generation
is independent of the bound on the scale of gauge-boson mass generation. While
our analysis focuses on deconstructed Higgsless models, any theory in which
top-quark mass generation proceeds via the mixing of chiral and vector fermions
will give similar results.


title: Is there a paradox in CP asymmetries of tau to K_{L,S} pi nu decays?

abstract:
  Based on the description of unstable $K_{L,S}$ particles in quantum field
theory (QFT), we compute the time-dependent probabilities for transitions
between asymptotic states in $\tau^{\pm} \to [\pi^+\pi^-]_K\pi^{\pm}\nu$
decays, where the pair $[\pi^+\pi^-]_K$ is the product of (intermediate state)
neutral kaon decays. Then we propose a definition of $\tau$ decays into $K_L$
and $K_S$ states, which reflects into the cancellation between their CP rate
asymmetries, thus solving in a natural way the paradox pointed out previously
in litterature. Since our definition of $K_{L,S}$ final states in $\tau$ decays
is motivated on experimental grounds, our predictions for the integrated CP
rate asymmetries can be tested in a dedicated experiment.


title:
The Qweak Experiment -- A search for new physics at the TeV Scale by
  measurement of the proton's weak charge

abstract:
  From a distance, the proton's weak charge is seen through the distorting
effects of clouds of virtual particles. The effective weak charge can be
calculated by starting with the measured weak coupling at the Z-pole and
"running" the coupling to lower energy or, equivalently, longer distances.
Because the "electroweak radiative corrections" or "loop diagrams" which give
rise to the running depend not only on known particles, but on particles which
have not yet been discovered, a difference between the calculated and measured
weak charges may signal new physics. A measurement of Qweak to 4% will be
sensitive to new physics at the few TeV scale. The Qweak experiment is based on
the fact that the parity-violating longitudinal analyzing power, Az, in
electron-proton scattering at low momentum transfer and small scattering angle,
is proportional to the proton's weak charge. The experiment plans to measure
the predicted Az of -0.3 ppm with a combined statistical and systematic
uncertainty of 2.2%, corresponding to a total uncertainty of 4% of Qweak. This
requires a statistical precision of 5 x 10^-9, which can be achieved in 2200
hours with an 85% polarized, 180 microamp electron beam incident on a 0.35 m
liquid hydrogen target. A synchronous data acquisition system will integrate
the detector current signals over each spin state and extract the helicity
correlated, parity violating component.


title: Zero Texture Model and SO(10) GUT

abstract:
  We study the bridge between the phenomenological mass matrix model and SO(10)
GUT. Namely, we consider the four zero texture model in the framework of the
renormalizable SO(10) GUT model. This unification gives more stringent
constraints than the case where only either model is considered. However, we
can obtain good fitting by expanding the minimal SO(10) GUT to include 120 in
addition to 10 and \bar 126 in Yukawa coupling and by considering both type-I
and type-II seesaw mechanisms.


title: Combining Left-Right And Quark-Lepton Symmetries In 5D

abstract:
  A five dimensional model containing both left-right and quark-lepton
symmetries is constructed, with the gauge group broken by a combination of
orbifold compactification and the Higgs mechanism. An analysis of the gauge and
scalar sectors is performed and it is shown that the 5d model admits a simpler
scalar sector. Bounds on the relevant symmetry breaking scales are obtained and
reveal that two neutral gauge bosons may appear in the TeV energy range to be
explored by the LHC. Split fermions are employed to remove the mass relations
implied by the quark-lepton symmetry and the necessary fermion localisation is
achieved by introducing bulk scalars with kink vacuum profiles. The symmetries
of the model constrain the Yukawa sector, which in turn severely constrains the
extent to which realistic split fermion scenarios may be realized in the
absence of Yukawa coupling hierarchies. Nevertheless we present two interesting
one generation constructs. One of these provides a rationale for $m_t>m_b,
m_{\tau}$ and $m_\nu\ll m_t$ with Yukawa parameters which vary by only a factor
of five. The other also suppresses the proton decay rate by spatially
separating quarks and leptons but requires a Yukawa parameter hierarchy of
order $10^2$.


title: Neutrino Mixing Sum Rules and Oscillation Experiments

abstract:
  The neutrino mixing sum rule $\theta_{12} - \theta_{13}\cos(\delta) \approx
\theta^\nu_{12}$ provides a possibility to explore the structure of the
neutrino mass matrix in the presence of charged lepton corrections, since it
relates the 1-2 mixing angle from the neutrino mass matrix, $\theta_{12}^\nu$,
to observable parameters of the PMNS mixing matrix. The neutrino mixing sum
rule holds if the charged lepton mixing angles are CKM-like, i.e., small and
dominated by a 1-2 mixing, and for small 1-3 mixing in the neutrino mass
matrix. These conditions hold in a wide class of well motivated flavour models.
We apply this sum rule to present oscillation data, and we investigate the
prospects of future neutrino facilities for exploring the sum rule by
simulating various setups for long-baseline reactor and accelerator
experiments. As explicit examples, we use the sum rule to test the hypotheses
of tri-bimaximal and bimaximal neutrino mixing, where $\theta^\nu_{12}$ is
predicted by $\sin^2(\theta^\nu_{12}) = 1/3$ or 1/2, respectively, although the
neutrino mixing sum rule can be used to test any prediction for
$\theta^\nu_{12}$.


title: Renormalizable Adjoint SU(5)

abstract:
  We investigate the possibility to find the simplest renormalizable grand
unified theory based on the SU(5) gauge symmetry. We find that it is possible
to generate all fermion masses with only two Higgs bosons, 5_H and 45_H. In
this context the neutrino masses are generated through the type III and type I
seesaw mechanisms. The predictions coming from the unification of gauge
couplings and the stability of the proton are discussed in detail. In this
theory the leptogenesis mechanism can be realized through the out of
equilibrium decays of the fermions in the adjoint representation.


title:
Determining quark and lepton mass matrices by a geometrical
  interpretation

abstract:
  By designating one eigenvector of the mass matrix, one can reduce the free
parameters in the mass matrix effectively. Applying this method to the quark
mass matrix and to the lepton mass matrix, we find that this method is
consistent with available experimental data. This approach may provide some
hints for constructing theoretical models. Especially, in the lepton sector,
the Koide's mass relation is connected to the element of the tribimaximal
matrix through Foot's geometrical interpretation. In the quark sector, we
suggest another mass formula and the same procedure also applies.


title: Squark Pair Production in the MSSM with Explicit CP Violation

abstract:
  We analyze effects of the CP-odd soft phases in the MSSM on the
pair-productions of colored superpartners in pp collisions at the LHC energies.
We find that, among all pair-production processes, those of the scalar quarks
in the first and second generations are particularly sensitive to the CP-odd
phases, more precisely, to the phases of the gluinos and neutralinos. We
compute pair-production cross sections, classify various production modes
according to their dependencies on the gluino and neutralino phases, perform a
detailed numerical analysis to determine individual as well as total cross
sections, and give a detailed discussion of EDM bounds. We find that
pair-productions of first and second generation squarks serve as a viable probe
of the CP violation sources in the gaugino sector of the theory even if
experiments cannot determine chirality, flavor and electric charge of the
squarks produced.


title: Spin Dependence of Heavy Quark Fragmentation

abstract:
  We propose that the non-perturbative fragmentation functions describing the
transition from a heavy quark to a heavy meson is proportional to the square of
the produced meson wave function at the origin. We analyze the effects of this
proposal on the number of pseudoscalar mesons compared to the number of vector
mesons produced and find a good agreement with experimental data. Finally, we
discuss further experimental checks for our hypothesis.


title: Color dipoles, PCAC and Adler's theorem

abstract:
  Being reformulated in the color dipole basis of small-x QCD Adler's theorem
establishes a connection between perturbative and non-perturbative descriptions
of DIS and quantifies the effect of non-perturbative dynamics on
would-be-perturbative observables. In particular, it provides a quantitative
measure of the non-perturbative influence on the longitudinal structure
function in charged current DIS and imposes stringent constraints on
non-perturbative parameters of color dipole models. Our analysis calls for new
experimental tests of Adler's theorem in diffractive neutrino scattering.


title: Form factor in K+ --> pi+ pi0 gamma: interference versus direct emission

abstract:
  We analyze the effect of a form factor in the magnetic contribution to K+ -->
pi+ pi0 gamma. We emphasize how this can show up experimentally: in particular
we try to explore the difference between a possible interference contribution
and a form factor in the magnetic part. The form factor used for K+ --> pi+ pi0
gamma is analogous to the one for KL --> pi+ pi- gamma, experimentally well
established.


title: Bulk and Spectral Observables in Lattice QCD

abstract:
  We review recent developments in lattice siumulations of the equation of
state, order of the thermal phase transition and the determination of the
pseudo-critical temperature in (2+1)-flavor QCD. Owing to the increasing
computer power, new argothithms, and improved fermion formulations, studies of
bulk QCD matter are approaching to the stage of precision science. We also
review recent lattice studies on the spectral properties of heavy quarkoniums
inside the quark-gluon plasma (QGP). Although they are still in an exploratory
stage, interesting physics in relation to the strongly correlated QGP is being
extracted.


title: Resonant CP Violation due to Heavy Neutrinos at the LHC

abstract:
  The observed light neutrinos may be related to the existence of new heavy
neutrinos in the spectrum of the SM. If a pair of heavy neutrinos has nearly
degenerate masses, then CP violation from the interference between tree-level
and self-energy graphs can be resonantly enhanced. We explore the possibility
of observing CP asymmetries due to this mechanism at the LHC. We consider a
pair of heavy neutrinos N_{1,2} with masses ranging from 100 to 500 GeV and a
mass-splitting \Delta m_N = m_{N_2}-m_{N_1} comparable to their widths
\Gamma_{N_{1,2}}. We find that for \Delta m_N ~ \Gamma_{N_{1,2}}, the resulting
CP asymmetries can be very large or even maximal and therefore, could
potentially be observed at the LHC.


title: The Effective Potential, the Renormalisation Group and Vacuum Stability

abstract:
  We review the calculation of the the effective potential with particular
emphasis on cases when the tree potential or the
renormalisation-group-improved, radiatively corrected potential exhibits
non-convex behaviour. We illustrate this in a simple Yukawa model which
exhibits a novel kind of dimensional transmutation. We also review briefly
earlier work on the Standard Model. We conclude that, despite some recent
claims to the contrary, it can be possible to infer reliably that the tree
vacuum does not represent the true ground state of the theory.


title: QCD phase diagram and charge fluctuations

abstract:
  We discuss the phase structure and fluctuations of conserved charges in two
flavor QCD. The importance of the density fluctuations to probe the existence
of the critical end point is summarized. The role of these fluctuations to
identify the first order phase transition in the presence of spinodal phase
separation is also discussed.


title: The Higgs field can be expressed through the lepton and quark fields

abstract:
  The Higgs field is a central point of the Standard Model supplying masses to
other fields through the symmetry breaking mechanism. However, it is associated
with an elementary particle which is not yet discovered experimentally. In this
short note I suggest a way for expressing the Higgs field through other fields
of the Standard Model. If this is the case, being not an independent field, the
Higgs field does not require an elementary particle to be associated with it.


title: Non-Abelian energy loss in cold nuclear matter

abstract:
  We use a formal recurrence relation approach to multiple parton scattering to
find the complete solution to the problem of medium-induced gluon emission from
partons propagating in cold nuclear matter. The differential bremsstrahlung
spectrum, where Landau-Pomeranchuk-Migdal destructive interference effects are
fully accounted for, is calculated for three different cases: (1) a
generalization of the incoherent Bertsch-Gunion solution for asymptotic
on-shell jets, (2) initial-state energy loss of incoming jets that undergo hard
scattering and (3) final-state energy loss of jets that emerge out of a hard
scatter. Our analytic solutions are given as an infinite opacity series, which
represents a cluster expansion of the sequential multiple scattering. These new
solutions allow, for the first time, direct comparison between initial- and
final-state energy loss in cold nuclei. We demonstrate that, contrary to the
naive assumption, energy loss in cold nuclear matter can be large. Numerical
results to first order in opacity show that, in the limit of large jet
energies, initial- and final-state energy losses exhibit different path length
dependences, linear versus quadratic, in contrast to earlier findings. In
addition, in this asymptotic limit, initial-state energy loss is considerably
larger than final-state energy loss. These new results have significant
implications for heavy ion phenomenology in both p+A and A+A reactions.


title:
Analytic Expression for the Joint x and Q^2 Dependences of the Structure
  Functions of Deep Inelastic Scattering

abstract:
  We obtain a good analytic fit to the joint Bjorken-x and Q^2 dependences of
ZEUS data on the deep inelastic structure function F_2(x, Q^2). At fixed
virtuality Q^2, as we showed previously, our expression is an expansion in
powers of log (1/x) that satisfies the Froissart bound. Here we show that for
each x, the Q^2 dependence of the data is well described by an expansion in
powers of log Q^2. The resulting analytic expression allows us to predict the
logarithmic derivatives {({\partial}^n F_2^p/{{(\partial\ln Q^2}})^n)}_x for n
= 1,2 and to compare the results successfully with other data. We extrapolate
the proton structure function F_2^p(x,Q^2) to the very large Q^2 and the very
small x regions that are inaccessible to present day experiments and contrast
our expectations with those of conventional global fits of parton distribution
functions.


title: Pentaquark Searches

abstract:
  Current evidence does not favor the existence of the \thplus pentaquark,
which was reported by several groups in the years after 2002. The question
naturally arises: how could many groups could have seen fluctuations in their
data at the level of 3-5 $\sigma$ statistical significance? An example of a
statistical fluctuation is given and the number of $\sigma$'s necessary for
claims of discovery are examined. Using this guideline, a possible answer to
the above question is presented.


title: Texture 4 zero Fritzsch-like lepton mass matrices

abstract:
  For Majorana or Dirac neutrinos, using Fritzsch-like texture 4 zero mass
matrices with parallel texture structures for the charged leptons and the Dirac
neutrino mass matrix (M_{\nu D}), detailed predictions for cases pertaining to
normal/inverted hierarchy as well as degenerate scenarios of neutrino masses
have been carried out. The inverted hierarchy as well as degenerate scenarios
seem to be ruled out at 3 \sigma C.L. for both Majorana and Dirac neutrinos.
For normal hierarchy, Jarlskog's rephasing invariant parameter J, the CP
violating Dirac-like phase \delta and the effective neutrino mass m_{ee} have
been calculated. For this case, lower limits of m_{\nu_1} and \theta_{13} would
have implications for the nature of neutrinos.


title: Pomeron with a running coupling in the nucleus

abstract:
  The running coupling is introduced into the equation for propagation of the
pomeron in the nucleus via the bootstrap relation. The resulting equation
coincides with the one obtained in the colour dipole formalism by summing
contributions from quark-antiquark loops, with a general choice of the
regularization scheme.


title:
Neutrino Mixing: from the Broken \mu-\tau Symmetry to the Broken
  Friedberg-Lee Symmetry

abstract:
  I argue that the observed flavor structures of leptons and quarks might imply
the existence of certain flavor symmetries. The latter should be a good
starting point to build realistic models towards deeper understanding of the
fermion mass spectra and flavor mixing patterns. The \mu-\tau permutation
symmetry serves for such an example to interpret the almost maximal atmospheric
neutrino mixing angle (\theta_23 \sim 45^\circ) and the strongly suppressed
CHOOZ neutrino mixing angle (\theta_13 < 10^\circ). In this talk I like to
highlight a new kind of flavor symmetry, the Friedberg-Lee symmetry, for the
effective Majorana neutrino mass operator. Luo and I have shown that this
symmetry can be broken in an oblique way, such that the lightest neutrino
remains massless but an experimentally-favored neutrino mixing pattern is
achievable. We get a novel prediction for \theta_13 in the CP-conserving case:
\sin\theta_13 = \tan\theta_12 |(1- \tan\theta_23)/ (1+ \tan\theta_{23})|. Our
scenario can simply be generalized to accommodate CP violation and be combined
with the seesaw mechanism. Finally I stress the importance of probing possible
effects of \mu-\tau symmetry breaking either in terrestrial neutrino
oscillation experiments or with ultrahigh-energy cosmic neutrino telescopes.


title:
Comments to the calculation of transverse beam spin asymmetry for
  electron proton elastic scattering

abstract:
  The transverse beam spin induced asymmetry is calculated for the scattering
of transversally polarized electrons on a proton target within a realistic
model. Such asymmetry is due to the interference between the Born amplitude and
the imaginary part of two photon exchange amplitude. In particular, the
contribution of non-excited hadron state (elastic) to the two photon amplitude
is calculated. The elastic contribution requires infrared divergences
regularization and can be expressed in terms of numerical integrals of the
target form factor. The inelastic channel corresponding to the one pion
hadronic state contribution is enhanced by squared logarithmic terms. We show
that the ratio of elastic over inelastic channel is of the order of 0.3 and
cannot be ignored. Enhancement effects due to the decreasing of form factors
bring the transverse beam asymmetry to values as large as $10^{-4}$ for
particular kinematical conditions.


title:
The Role of Beam polarization for Radiative Neutralino Production at the
  ILC

abstract:
  We analyze the impact of electron and positron beam polarization on radiative
neutralino production at the International Linear Collider (ILC). We focus on
three different mSUGRA scenarios in turn at the Higgs strahlung threshold, the
top pair production threshold, and at $\sqrt{s} =500\GeV$. In these scenarios
at the corresponding $\sqrt{s}$, radiative neutralino production is the only
supersymmetric production mechanism which is kinematically allowed. The heavier
neutralinos, and charginos as well as the sleptons, squarks and gluinos are too
heavy to be pair produced. We calculate the signal cross section and also the
Standard Model background from radiative neutrino production. For our
scenarios, we obtain significances larger than 10 and signal to background
ratios between 2% and 5%, if we have electron beam polarization $P_{e^-} = 0.0-
0.8$ and positron beam polarization $P_{e^+} = 0.0 - 0.3$. If we have electron
beam polarization of $P_{e^-} = 0.9$, then the signal is observable with
$P_{e^+} = 0.0$ but both the significance and the signal to background ratio
are significantly improved for $P_{e^+} = 0.3$.


title: Gluon Condensate, Wilson Loops and Gauge/String Duality

abstract:
  We test gauge/string duality by evaluating expectation values of small Wilson
loops in pure Yang-Mills theories. On the gauge-theory side, there exists rich
phenomenology. The dual formulation provides with a universal language to
evaluate the gluon condensate and quadratic correction in terms of the metric
in the fifth coordinate. Quantitatively, the estimated value of the gluon
condensate is approximately 0.010 GeV^4.


title:
Testing confining potentials through meson/baryon hyperfine splitting
  ratio

abstract:
  In this paper we discuss a quantity that can be derived from the hadronic
spectrum - the ratio between the color hyperfine splitting of a K meson and
that of a Sigma baryon. It will be shown that within the constituent quark
model this ratio depends only on the ratio of contact probabilities within the
hadrons. We compute this ratio assuming several phenomenological potential
models, and show that the best agreement with data is obtained from the Cornell
potential - Coulomb + linear. Thus the analysis of color hyperfine interactions
corroborat es the preference for the Cornell potential based on quarkonium
spectra.


title:
An NNLO subtraction formalism in hadron collisions and its application
  to Higgs boson production at the LHC

abstract:
  We consider higher-order QCD corrections to the production of colourless
high-mass systems (lepton pairs, vector bosons, Higgs bosons,...) in hadron
collisions. We propose a new formulation of the subtraction method to
numerically compute arbitrary infrared-safe observables for this class of
processes. To cancel the infrared divergences, we exploit the universal
behaviour of the associated transverse-momentum (q_T) distributions in the
small-q_T region. The method is illustrated in general terms up to the
next-to-next-to-leading order (NNLO) in QCD perturbation theory. As a first
explicit application, we study Higgs boson production through gluon fusion. Our
calculation is implemented in a parton level Monte Carlo program that includes
the decay of the Higgs boson in two photons. We present selected numerical
results at the LHC.


title: Two-Loop Formfactors in Theories with Mass Gap and Z-Boson Production

abstract:
  The two-loop formfactor both for a U(1)xU(1) and a SU(2)xU(1) gauge theory
with massive and massless gauge bosons respectively is evaluated at arbitrary
momentum transfer q^2. The asymptotic behaviour for q^2->\infinity is compared
to a recent calculation of Sudakov logarithms. The result is an important
ingredient for the calculation of radiative corrections to Z-boson production
at hadron and lepton colliders.


title: Some Comments on an MeV Cold Dark Matter Scenario

abstract:
  We discuss several aspects of astroparticle physics pertaining to a new model
with MeV cold dark matter particles, which annihilate to electron-positron
pairs in a manner yielding the correct CDM density required today, and
explaining the enhanced electron-positron annihilation line from the center of
the Galaxy. We note that the mass of the vector meson mediating the
annihilations, should exceed the mass of CDM particle, and comment on possible
enhancement due to CDM clustering, on the detectability of the new CDM, and on
particle physics models incorporating this scenario.


title: Non-Perturbative Flat Direction Decay

abstract:
  We argue that supersymmetric flat direction vacuum expectation values can
decay non-perturbatively via preheating. Considering a toy U(1) gauge theory,
we explicitly calculate the scalar potential, in the unitary gauge, for
excitations around several flat directions. We show that the mass matrix for
the excitations has non-diagonal entries which vary with the phase of the flat
direction vacuum expectation value. Furthermore, this mass matrix has zero
eigenvalues whose eigenstates change with time. We show that these light
degrees of freedom are produced copiously in the non-perturbative decay of the
flat direction vacuum expectation value.


title:
SUSY QCD one-loop effects in (un)polarized top-pair production at hadron
  colliders

abstract:
  We study the effects of O(alpha_s) supersymmetric QCD (SQCD) corrections on
the total production rate and kinematic distributions of polarized and
unpolarized top-pair production in pp and p anti-p collisions. At the Fermilab
Tevatron p anti-p collider, top-quark pairs are mainly produced via
quark-antiquark annihilation, q anti-q -> t anti-t, while at the CERN LHC pp
collider gluon-gluon scattering, g g -> t anti-t, dominates. We compute the
complete set of O(alpha_s) SQCD corrections to both production channels and
study their dependence on the parameters of the Minimal Supersymmetric Standard
Model. In particular, we discuss the prospects for observing strong,
loop-induced SUSY effects in top-pair production at the Tevatron Run II and the
LHC.


title:
Calculable One-Loop Contributions to S and T Parameters in the
  Gauge-Higgs Unification

abstract:
  We investigate the one-loop contributions to S and T oblique parameteres in
gauge-Higgs unification. We show that these parameters are finite in five
dimensional space-time, but are divergent in more than five dimensions.
Remarkably, however, we find that a particular linear combination of S and T
parameters, S - 4 \cos \theta_{W} T, becomes finite for six dimensional
space-time, though each of these parameters is divergent. This is because, in
the Gauge-Higgs unification scenario, the operators relevant for S and T
parameters are not independent, but are included in a unique higher dimensional
gauge invariant operator. Thus the predictable linear combination is model
independent, irrespectibly of the detail of the matter content.


title: Structure of S and T Parameters in Gauge-Higgs Unification

abstract:
  We investigate the divergence structure of one-loop corrections to S and T
parameteres in gauge-Higgs unification. We show that these parameters are
finite in five dimensions, but divergent in more than five dimensions.
Remarkably, a particular linear combination of S and T parameters becomes
finite in six dimension case, which is indicated from the operator analysis in
a model independent way.


title: Effect of Relic Neutrino on Neutrino Pair Emission from Metastable Atoms

abstract:
  A possiblity of measuring the cosmic neutrino temperature $\sim 1.9 K$ and
other important quantities such as the chemical potential $\mu$ and the
decoupling temperature $T_d$ is discussed, using the recently proposed process
of photon irradiated neutrino pair emission from metastable atoms. The Pauli
blocking effect of relic neutrinos reduces the rate by a large factor $\approx
(1 + m_1/T_d)/4$ at the threshold of the lightest neutrino pair (of mass
$2m_1$). Correction of linear order in $\mu$ near the mass thresholds can be
used to improve the constraint on the lepton asymmetry.


title: Excited flux tube from $q\bar q g$ hybrid mesons

abstract:
  In the framework of quark models, hybrid mesons are either seen as two-body
$q\bar q$ systems with an excited flux tube connecting the quark to the
antiquark or as three-body $q\bar q g$ systems including a constituent gluon.
In this work we show that, starting from the three-body wave function of the
$q\bar q g$ hybrid meson in which the gluonic degrees of freedom are averaged,
the excited flux tube picture emerges as an equivalent $q\bar q$ potential.
This equivalence between the excited flux tube and the constituent gluon
approach is confirmed for heavy hybrid mesons but, for the first time, it is
shown to hold in the light sector too, provided the contribution of the quark
dynamics is correctly taken into account.


title: On-shell recursion relations for all Born QCD amplitudes

abstract:
  We consider on-shell recursion relations for all Born QCD amplitudes. This
includes amplitudes with several pairs of quarks and massive quarks. We give a
detailed description on how to shift the external particles in spinor space and
clarify the allowed helicities of the shifted legs. We proof that the
corresponding meromorphic functions vanish at z --> infinity. As an application
we obtain compact expressions for helicity amplitudes including a pair of
massive quarks, one negative helicity gluon and an arbitrary number of positive
helicity gluons.


title: Hybrid potentials versus gluelumps

abstract:
  A potential model description of heavy quarkonium can be rigorously deduced
from QCD under some circumstances. The potentials can be unambiguously related
with Wilson loops with gluonic insertions, the spectral decomposition of which
is a function of the spectrum and matrix elements solution of the static limit
of NRQCD. This spectrum is nothing but the static singlet potential and the
hybrid potentials (which correspond to the gluonic excitations). We will
quantitatively show that the latter unambiguously relate to the gluelumps at
short distances using effective field theories.


title:
Quark Mass Ratios in ChPT with the Difference of Quark Condensates
  Considered

abstract:
  The chiral effective Lagrangian for pseudoscalar nonet is constructed in
consideration of isospin breaking. And the difference of quark condensates is
taken accounted. The SU(3) singlet eta0 is not taken as Goldstone-boson. The
mixing with and without isospin symmetry is considered. The quark mass ratios
are obtained through solving the mass equations of mesons. We estimate the
change of quark mass ratios according to the change of the masses of pion+ and
kaon+ to see how the electromagnetic corrections affect our results. It turn
out that massless up quark is possible. The upper limit for mu/md is around
0.39. 2ms/(mu+md)=24.23~25.12. The values for quark condensate ratios and other
constants are limited in narrow ranges.


title: Collider and Dark Matter Phenomenology of Models with Mirage Unification

abstract:
  We examine supersymmetric models with mixed modulus-anomaly mediated SUSY
breaking (MM-AMSB) soft terms which get comparable contributions to SUSY
breaking from moduli-mediation and anomaly-mediation. The apparent (mirage)
unification of soft SUSY breaking terms at Q=mu_mir not associated with any
physical threshold is the hallmark of this scenario. The MM-AMSB structure of
soft terms arises in models of string compactification with fluxes, where the
addition of an anti-brane leads to an uplifting potential and a de Sitter
universe, as first constructed by Kachru {\it et al.}. The phenomenology mainly
depends on the relative strength of moduli- and anomaly-mediated SUSY breaking
contributions, and on the Higgs and matter field modular weights, which are
determined by the location of these fields in the extra dimensions. We
delineate the allowed parameter space for a low and high value of tan(beta),
for a wide range of modular weight choices. We calculate the neutralino relic
density and display the WMAP-allowed regions. We show the reach of the CERN LHC
and of the International Linear Collider. We discuss aspects of MM-AMSB models
for Tevatron, LHC and ILC searches, muon g-2 and b->s \gamma branching
fraction. We also calculate direct and indirect dark matter detection rates,
and show that almost all WMAP-allowed models should be accessible to a
ton-scale noble gas detector. Finally, we comment on the potential of colliders
to measure the mirage unification scale and modular weights in the difficult
case where mu_mir>>M_GUT.


title:
The nucleon form-factors of the energy momentum tensor in the Skyrme
  model

abstract:
  The nucleon form factors of the energy-momentum tensor are studied in the
large-Nc limit in the framework of the Skyrme model.


title:
Electromagnetic Radiation from Broken Symmetries in Relativistic Nuclear
  Collisions

abstract:
  A new channel of direct photon production from a quark gluon plasma (QGP) is
explored in the framework of high-temperature QCD. This process appears at
next-to-leading order, in the presence of a charge asymmetry in the excited
matter. The photon production rate from this new mechanism is suppressed
compared to the QCD annihilation and Compton scattering at low baryon density
but assumes importance in baryon-rich matter.


title: In Search of the (Minimal Supersymmetric) Standard Model String

abstract:
  This paper summarizes several developments in string-derived (Minimal
Supersymmetric) Standard Models. Part one reviews the first string model
containing solely the three generations of the Minimal Supersymmetric Standard
Model and a single pair of Higgs as the matter in the observable sector of the
low energy effective field theory. This model was constructed by Cleaver,
Faraggi, and Nanopoulos in the Z_2 x Z_2 free fermionic formulation of weak
coupled heterotic strings. Part two examines a representative collection of
string/brane-derived MSSMs that followed. These additional models were obtained
from various construction methods, including weak coupled Z_6 heterotic
orbifolds, strong coupled heterotic on elliptically fibered Calabi-Yau's, Type
IIB orientifolds with magnetic charged branes, and Type IIA orientifolds with
intersecting branes (duals of the Type IIB). Phenomenology of the models is
compared. To appear in String Theory Research Progress, Ferenc N. Balogh,
editor., (ISBN 978-1-60456-075-6), Nova Science Publishers, Inc.}


title:
Zero Threshold Reactions for Detecting Ultra Low Energy Cosmic Relic
  Neutrinos

abstract:
  Paper withdrawn by author. Theoretical formalism employed is inappropriate to
the problem considered.


title: Which long-baseline neutrino experiments are preferable?

abstract:
  We discuss the physics of superbeam upgrades, where we focus on T2KK, a NuMI
beam line based experiment NOvA*, and a wide band beam (WBB) experiment
independent of the NuMI beam line. For T2KK, we find that the Japan-Korea
baseline helps resolve parameter degeneracies, but the improvement due to
correlated systematics between the two detectors (using identical detectors) is
only moderate. For an upgrade of NOvA with a liquid argon detector, we
demonstrate that the Ash River site is preferred compared to alternatives, such
as at the second oscillation maximum, and is the optimal site within the U.S.
For a WBB experiment, we find that high proton energies and long decay tunnels
are preferable. We compare water Cherenkov and liquid argon technologies, and
find the break-even point in detector cost at about 4:1. In order to compare
the physics potential of the different experimental configurations, we use the
concept of exposure to normalize the performance. We find that experiments with
WBBs are the best experimental concept. NOvA* could be competitive with
sufficient luminosity. If $\sin^2 2\theta_{13}$ > 0.01, a WBB experiment can
perform better than a neutrino factory.


title:
Universal Nonperturbative Effects in Event Shapes from Soft-Collinear
  Effective Theory

abstract:
  Two-jet event shape distributions, traditionally studied in the language of
perturbative QCD, can be described naturally in soft-collinear effective
theory. In this language, we demonstrate factorization of event shape
distributions into perturbatively-calculable hard and jet functions and
nonperturbative soft functions, and show how the latter contribute universal
shifts to the mean values of various event shape distributions. Violations of
universality in shifts of higher moments can give information on correlations
of energy flow in soft radiation.


abstract:
  We present the manual for the program BRIDGE: Branching Ratio Inquiry/Decay
Generated Events. The program is designed to operate with arbitrary models
defined within matrix element generators, so that one can simulate events with
small final-state multiplicities, decay them with BRIDGE, and then pass them to
showering and hadronization programs. BRI can automatically calculate widths of
two and three body decays. DGE can decay unstable particles in any Les Houches
formatted event file. DGE is useful for the generation of event files with long
decay chains, replacing large matrix elements by small matrix elements followed
by sequences of decays. BRIDGE is currently designed to work with the
MadGraph/MadEvent programs for implementing and simulating new physics models.
In particular, it can operate with the MadGraph implementation of the MSSM. In
this manual we describe how to use BRIDGE, and present a number of sample
results to demonstrate its accuracy.


title: $B$ to light meson form factors with end-point cutoff

abstract:
  Decay form factors of $B$ to light pseudoscalar ($P$) and vector ($V$) mesons
are analyzed with the momentum cutoff near end point. The cutoff is caused by
possible Cherenkov gluon radiation when an energetic light parton from the weak
vertex travels through the ''brown muck'' of light degrees of freedom. The
end-point singularities and the double countings are naturally absent. The
soft-overlap contributions where the partonic momenta configuration is highly
asymmetric are very suppressed in this framework. A simple calculation gives a
plausible results for $B\to P,V$ form factors.


title: Neutrino inclusive inelastic scattering off nuclei

abstract:
  We present a detailed description of high-energy neutrino and antineutrino
inelastic inclusive scattering off nuclei in terms of nuclear structure
functions. In our approach we take into account a QCD description of the
nucleon structure functions as well as a number of basic nuclear effects
including nuclear shadowing, Fermi motion and binding, nuclear pion excess and
off-shell correction to bound nucleon structure functions. These effects prove
to be important in the studies of charged-lepton deep-inelastic scattering. We
discuss similarities and dissimilarities in the calculation of nuclear effects
for charged-lepton and neutrino scattering caused by nonconserved axial current
in neutrino scattering. We examine the Adler and the Gross-Llewellyn-Smith sum
rules for nuclear structure functions and find a remarkable cancellation
between nuclear shadowing and off-shell corrections in these sum rules. We
present calculations of differential cross sections for inclusive neutrino and
antineutrino scattering in comparison with recent data on different target
materials.


title: Increasing the effective number of neutrinos with decaying particles

abstract:
  We present models of decaying particles for increasing the effective number
of neutrinos N_nu after big bang nucleosynthesis but before the structure
formation begins. We point out that our scenario not only solves the
discrepancy between the constraints on N_nu from these two epochs, but also
provides a possible answer to deeper inconsistency in the estimation of the
matter power spectrum amplitude at small scales, represented by sigma_8,
between the WMAP and some small scale matter power measurements such as the
Lyman-alpha forest and weak lensing. We consider (a) saxion decay into two
axions; (b) gravitino decay into axino and axion; (c) Dirac right-handed
sneutrino decay into gravitino and right-handed neutrino.


title: Flavour physics at large tan(beta) with a Bino-like LSP

abstract:
  The MSSM with large tan(beta) and heavy squarks is a theoretically well
motivated and phenomenologically interesting extension of the SM. This scenario
naturally accommodates the (g-2)_\mu anomaly and the upper bound on the Higgs
boson mass. In a wide region of the parameter space, visible non-standard
effects are expected in a few low-energy observables, such as BR(B->tau nu),
BR(B->l+ l-), BR(B->Xs gamma), and BR(mu->e gamma). We analyse the correlations
of these non-standard effects under the additional assumption that the relic
density of a Bino-like LSP accommodates the observed dark matter distribution.


title: Inclusive B decays from resummed perturbation theory

abstract:
  I review the recent progress in computing inclusive B decay widths and
spectra and its implications on the interpretation of measurements from the B
factories. I discuss the inclusive charmless semileptonic decay, B -> X_u l nu,
which provides the most robust determination of the CKM parameter |V_{ub}|, and
the rare radiative decay, B -> X_s gamma, which constrains flavor violation
beyond the Standard Model. I demonstrate that precise predictions for the
experimentally-relevant branching fractions can be derived from resummed
perturbation theory and explain the way in which the resummation further
provides guidance in parametrizing non-perturbative Fermi-motion effects.
Finally I address the comparison between theory and data and discuss future
prospects.


title:
Spectrum of soft mode with thermal mass of quarks above critical
  temperature

abstract:
  We study effects of a thermal-quark mass and Landau damping of quarks on the
chiral phase transition and its soft modes at finite temperature. For this
purpose we employ a simple model with the quark propagator obtained in the hard
thermal loop approximation. We show that the chiral phase transition is second
order even if quark have a finite thermal mass, and the thermal mass suppresses
the chiral condensate. We argue that mesonic spectra have a large width due to
scattering between gluons and quarks, and the van Hove singularity at
threshold.


title:
Test of the Universal Rise of Hadronic Total Cross Sections at
  Super-high Energies

abstract:
  Saturation of the Froissart-Martin unitarity bound that the total cross
sections increase like log2(s/s_0) appears to be confirmed. Due to this
statement, the B log2(s/s_0) was assumed to extend the universal rise of all
the total hadronic cross sections to reduce the number of adjustable parameters
by the COMPETE Collaboration in the Particle Data Group (2006). Based on this
assumption of parametrization, we test if the assumption on the universality of
$B$ is justified through investigations of the value of B for pi p(K p)$ and
pbar p, pp scatterings. We search for the simultaneous best fit to sigma(tot)
and rho ratios, using a constraint from the FESR of the P' type for pi p
scatterings and constraints which are free from unphysical regions for pbar
p,pp and K p scatterings. By including rich informations of the low-energy
scattering data owing to the use of FESR, the errors of B parameters decreases
especially for pi p. The resulting value of B(pp) is consistent with B(pi p)
within two standard deviation, which appears to support the universality
hypothesis.


title: Rare K decays in the Standard Model

abstract:
  The very clean theoretical predictions for the rare decays K --> pi nu nu_bar
and KL --> pi0 l+ l- are reviewed, and their various theoretical inputs
summarized. The less favorable situation for KL --> mu+ mu- is also commented.


title:
An illustration and analysis of the degeneracy in the search for the
  leptonic CP-violating angle and the neutrino mass hierarchy

abstract:
  Determination of the value of the leptonic CP-violating phase deltaand the
neutrino mass hierarchy sgn(dm2_31) through long baselineneutrino oscillation
experiments is systematically analyzed. We notethat the two oscillation spectra
are difficult to discriminate andlead to the degeneracy when they are peaked at
the same energy andhave the same peak probability. The condition of
peak-matching istherefore introduced as a criterion for the presence of
degeneracy.The matching of peaks is visualized as an intersection of
trajectoriestraced by the peak of an oscillation spectrum while the value of
deltais varied from 0 to 2pi. We numerically calculate a pair oftrajectories
for a pair of hierarchies and examine the degeneracy,especially that concerning
the hierarchy. We formulate the trajectoryin terms of analytic expressions and
evaluate the critical length,which is shown to be proportional to
1/sin(theta_13). In view of ouranalysis, we discuss future prospects to solve
the hierarchydegeneracy with regard to the following four approaches:
elongatingthe baseline length sufficiently, using both neutrinos
andanti-neutrinos, combining experiments with different baseline lengths,and
observing two or more oscillation peaks.


title: Explicit CP violation in a MSSM with an extra $U(1)'$

abstract:
  We study that a minimal supersymmetric standard model with an extra $U(1)'$
gauge symmetry may accommodate the explicit CP violation at the one-loop level
through radiative corrections. This model is CP conserving at the tree level
and cannot realize the spontaneous CP violation for a wide parameter space at
the one-loop level. In explicit CP violation scenario, we calculate the Higgs
boson masses and the magnitude of the scalar-pseudoscalar mixings in this model
at the one-loop level by taking into account the contributions of top quarks,
bottom quarks, exotic quarks, and their superpartners. In particular, we
investigate how the exotic quarks and squarks would affect the
scalar-pseudoscalar mixings. It is observed that the size of the mixing between
the heaviest scalar and pseudoscalar Higgs bosons is changed up to 20 % by a
complex phase originated from the exotic quark sector of this model.


title: Relativistic BCS-BEC Crossover at Zero Temperature

abstract:
  We investigate the BCS-BEC crossover at zero temperature in the frame of a
relativistic model. The universality of the BCS-BEC crossover for
non-relativistic systems breaks down in relativistic case and the crossover can
be induced by changing the density. When the effective scattering length is
much less than the fermion Compton wavelength, we recover the non-relativistic
result if the gas is initially in non-relativistic state. At ultra-strong
coupling where the scattering length is of the order of the Compton wavelength,
a new BEC state appears. In this state the condensed bosons become nearly
massless and anti-fermions are excited. The behavior of the Goldstone mode and
the mixing between the amplitude and phase modes are significantly different in
different condensed regions.


title: SANCnews: Sector 4f, Charged Current

abstract:
  In this paper we describe the implementation of the charged current decays of
the kind t --> b l^+ nu_l (gamma) into framework of SANC system. All
calculations are done taking into account one-loop electroweak correction in
the Standard Model. The emphasis of this paper is done on the presentation of
numerical results. Various distributions are produced by means of a Monte Carlo
integrator and event generator. Comparison with the results of CompHEP and
PYTHIA packages are presented for the Born and hard photon contributions. The
validity of the cascade approximation at one-loop level is also studied.


title: Relaxed fine-tuning in models with non-universal gaugino masses

abstract:
  We study, in a bottom-up approach, the fine-tuning problem between soft SUSY
breaking parameters and the $\mu$-term for the successful electroweak symmetry
breaking in the minimal supersymmetric standard model. It is shown that certain
nontrivial ratios between gaugino masses, that is non-universal gaugino masses,
are necessary at the GUT scale, in order for the fine-tuning to be reduced
above 10 % order. In addition, when all the gaugino masses should be regarded
as independent ones in their origins, a small gluino mass $M_3 \lesssim 120$
GeV and a non-vanishing $A$-term $A_t \sim O(M_3)$ associated to top squarks
are also required at the GUT scale as well as the non-universality. On the
other hand, when we consider some UV theory, which fixes ratios of soft SUSY
breaking parameters as certain values with the overall magnitude, heavier
spectra are allowed. It is favored that the gluino and wino masses are almost
degenerate at the weak scale, while wider region of bino mass is favorable.


title:
Langevin equation in effective theory of interacting QCD pomerons in the
  limit of large $N_c$

abstract:
  Effective field theory of interacting BFKL pomerons is investigated and
Langevin equations for the theory, which arise after the introduction of
additional auxiliary field, are obtained. The Langevin equations are considered
for the case of interacting BFKL pomerons with both splitting and merging
vertexes and for the interaction which includes additional "toy" four pomeron
interaction vertex. In the latest case an analogy with the Regge field theory
in zero dimensions (RFT-0) was used in order to obtain this "toy" four pomeron
interaction vertex. The comparison between the Langevin equations obtained in
the frameworks of dipole and RFT approaches is performed, the interpretation of
results is given and possible implementation of obtained equations is
discussed.


title: Predictive flavour symmetries of the neutrino mass matrix

abstract:
  Here we propose an $A_4$ flavour symmetry model which implies a lower bound
on the neutrinoless double beta decay rate, corresponding to an effective mass
parameter $M_{ee} \gsim 0.03$ eV, and a direct correlation between the expected
magnitude of CP violation in neutrino oscillations and the value of
$\sin^2\theta_{13}$, as well as a nearly maximal CP phase $\delta$.


title:
Elastic s-wave B pi, D pi, D K and K pi scattering from lattice
  calculations of scalar form factors in semileptonic decays

abstract:
  We show how theoretical, principally lattice, calculations of the scalar form
factors in semileptonic pseudoscalar-to-pseudoscalar decays can be used to
extract information about the corresponding elastic s-wave scattering channels.
We find values for the scattering lengths m_pi a = 0.179(17)(14), 0.26(26) and
0.29(4) for elastic s-wave isospin-1/2 K pi, B pi and D pi channels
respectively. We also determine phase shifts. For the D K channel we find hints
that there is a bound state which can be identified with the recently
discovered D_{s0}^+(2317).


title:
Table of integrals. Asymptotical expressions for non--collinear
  kinematics

abstract:
  We present a set of Feynman integrals appearing in calculations of different
QED processes to the one-loop accuracy. We consider scalar, vector, and tensor
integrals with two, three, four and five denominators. The cases of equal and
different fermion masses are considered. Results obtained are valid in the
region where all kinematical invariants are large compared to the masses
squared. Mass corrections for some scalar integrals in the case of different
fermion masses are also given.


title: Muon g-2: Review of Theory and Experiment

abstract:
  A review of the experimental and theoretical determinations of the anomalous
magnetic moment of the muon is given. The anomaly is defined by a=(g-2)/2,
where the Land\'e g-factor is the proportionality constant that relates the
spin to the magnetic moment. For the muon, as well as for the electron and
tauon, the anomaly a differs slightly from zero (of order 10^{-3}) because of
radiative corrections. In the Standard Model, contributions to the anomaly come
from virtual `loops' containing photons and the known massive particles. The
relative contribution from heavy particles scales as the square of the lepton
mass over the heavy mass, leading to small differences in the anomaly for e,
\mu, and \tau. If there are heavy new particles outside the Standard Model
which couple to photons and/or leptons, the relative effect on the muon anomaly
will be \sim (m_\mu/ m_e)^2 \approx 43\times 10^3 larger compared with the
electron anomaly. Because both the theoretical and experimental values of the
muon anomaly are determined to high precision, it is an excellent place to
search for the effects of new physics, or to constrain speculative extensions
to the Standard Model. Details of the current theoretical evaluation, and of
the series of experiments that culminates with E821 at the Brookhaven National
Laboratory are given. At present the theoretical and the experimental values
are known with a similar relative precision of 0.5 ppm. There is, however, a
3.4 standard deviation difference between the two, strongly suggesting the need
for continued experimental and theoretical study


title: Some Recent Results on Models of Dynamical Electroweak Symmetry Breaking

abstract:
  We review some recent results on models of dynamical electroweak symmetry
breaking involving extended technicolor.


title: A Twisted Custodial Symmetry in the Two-Higgs-Doublet Model

abstract:
  In the Standard Model for electroweak interactions, the Higgs sector is known
to display a "custodial" symmetry protecting the mass relation
m_{W^\pm}^2=m_{W_3}^2 from large corrections. When considering extensions of
the scalar sector, this symmetry has to be introduced by hand in order to pass
current electroweak precision tests in a natural way. In this Letter we
implement a generalized custodial symmetry in the two-Higgs-doublet model.
Assuming the invariance of the potential under CP transformations, we prove the
existence of a new custodial scenario characterized by m_{H^\pm}^2=m_{H^0}^2
instead of m_{H^\pm}^2=m_{A^0}^2. Consequently the pseudoscalar A^0 may be much
lighter than the charged H^\pm, giving rise to interesting phenomenology.


title: Extension of HPL to complex arguments

abstract:
  In this paper we describe the extension of the Mathematica package HPL to
treat harmonic polylogarithms of complex arguments. The harmonic polylogarithms
have been introduced by Remiddi and Vermaseren and have many applications in
high energy particle physics.


title: Peak loops untying the degeneracy of the neutrino parameters

abstract:
  Systematic analysis of the determination of the value of leptonic
CP-violating angle delta and the neutrino mass hierarchy sgn(delta m^2_31) by
long baseline neutrino oscillation experiments is presented. We note the
difficulty to distinguish a pair of oscillation probability spectra that are
peaked at the same energy and have the same probability at that energy. We
thereby set forth the peak-matching condition as a criterion of the presence of
degeneracy, and visualize it by intersections of the trajectories drawn by a
peak of an oscillation spectrum while the value of delta is varied from 0 to
2pi. We numerically calculate the pairs of the trajectories for both
hierarchies and show that the pair becomes disjoint as the baseline gets longer
than a critical length, indicating the matter effect resolving the degeneracy
on the hierarchy. We formulate the trajectories into analytic expressions and
evaluate the critical length. We provide prospects of the following four
approaches of resolving the hierarchy: making the baseline longer than the
critical length, using both neutrinos and anti-neutrinos, combining experiments
with different baseline lengths, and observing two or more oscillation peaks.


title:
Study of the Change from Walking to Non-Walking Behavior in a Vectorial
  Gauge Theory as a Function of N_f

abstract:
  Based on recent works [1,2], we present the results of calculations for
several physical quantities (meson masses, the S parameter, etc.) in a
vectorial gauge theory, as a function of the number of fermions, N_f. Solutions
of the Schwinger-Dyson and the Bethe-Salpeter equations with the improved
ladder approximation are used for the calculations. We focus on how the values
of physical quantities change as one moves from the QCD-like (non-walking) to
walking regimes.


title: Self-Calibration of Neutrino Detectors using characteristic Backgrounds

abstract:
  We introduce the possibility to use characteristic natural neutrino
backgrounds, such as Geoneutrinos (\bar{\nu}_e) or solar neutrinos (\nu_e),
with known spectral shape for the energy calibration of future neutrino
detectors, e.g. Large Liquid Scintillator Detectors. This "CalEffect" could be
used without the need to apply any modifications to the experiment in all
situations where one has a suitable background with sufficient statistics.
After deriving the effect analytically using \chi^2 statistics, we show that it
is only tiny for reactor neutrino experiments, but can be applicable in other
situations. As an example, we present its impact on the identification of the
wiggles in the power spectrum of supernova neutrinos caused by Earth matter
effects. The Self-Calibration Effect could be used for cross checking other
calibration methods and to resolve systematical effects in the primary neutrino
interaction processes, in particular in the low energy cross sections.


title:
Natural Dark Matter from an Unnatural Higgs Boson and New Colored
  Particles at the TeV Scale

abstract:
  The thermal relic abundance of Dark Matter motivates the existence of new
electroweak scale particles, independent of naturalness considerations.
However, most unnatural Dark Matter models do not ensure the presence of new
particles charged under SU(3)_C, resulting in challenging LHC phenomenology.
Here, we present a class of models with scalar electroweak doublet Dark Matter
that require a host of colored particles at the TeV scale. In these models, the
Higgs boson is apparently fine-tuned, but the Dark Matter doublet is kept light
without any additional fine-tuning.


title: Phenomenology of Top Partners at the ILC

abstract:
  The assumption of a new symmetry provides a nice explanation of the existence
of dark matter and an elegant way to avoid the electroweak constraints. This
symmetry often requires the pair production of new particles at colliders and
it guarantees that cascade decays down to the lightest particle give rise to
missing energy plus jets and leptons. For a long time, supersymmetry with the
conserved R-parity was the only candidate for such signals. However, any new
physics with this type of new symmetry may show up with similar signals and the
discrimination between different models at the LHC is quite challenging. In
this paper, we address the problem of discrimination between different models,
more concretely, in the little Higgs theory with T-parity (LHT) and the
supersymmetric theory with R-parity. We concentrate on the pair production of
heavy top partners, e.g., T-odd quarks in LHT and the scalar top quarks in the
MSSM at linear colliders (LC).


title: Breakdown of the Narrow Width Approximation for New Physics

abstract:
  The narrow width approximation is used in high energy physics to reduce the
complexity of scattering calculations. It is a fortunate accident that it works
so well for the Standard Model, but in general it will fail in the context of
new physics. We find numerous examples of significant corrections when the
calculation is performed fully off-shell including a finite width, notably from
effects from the decay matrix elements. If not taken into account, attempts to
reconstruct the Lagrangian of a new physics discovery from data would result in
considerable inaccuracies and likely inconsistencies.


title: Does the Cronin Peak Disappear at LHC Energies?

abstract:
  In this work we compare the nuclear modification factors in proton (deuteron)
-- nucleus collisions at CERN SPS, FNAL and RHIC energies in a wide p_T range.
In these experiments the nuclear modification factor has shown an enhancement
at p_T ~ 4 GeV/c. The height of this "Cronin peak" depends on the c.m. energy
of the collision, as it is subject to stronger shadowing at higher energies.
One of the aims of this contribution is to analyze the shadowing phenomenon at
lower (2 GeV/c < p_T < 4 GeV/c) and intermediate (4 GeV/c < p_T < 8 GeV/c)
transverse momentum. Different shadowing parameterizations are considered and
the obtained Cronin peaks are investigated at RHIC and LHC energies.


title:
Tevatron constraint on the Kaluza-Klein gluon of the Bulk
  Randall-Sundrum model

abstract:
  The Bulk Randall-Sundrum model, where all Standard Model particles except the
Higgs are free to propagate in the bulk, predicts the existence of Kaluza-Klein
(KK) modes of the gluon with a large branching into top-antitop pairs. We study
the production of the lowest KK gluon mode at the Tevatron energy and use the
data on the top cross-section from the Run II of Tevatron to put a bound on the
mass of the KK gluon. The resulting bound of 800 GeV, while being much smaller
than the constraints obtained on the KK gluon mass from flavour-changing
neutral currents, is the first, direct collider bound which is independent of
the specificities of the model.


title: Onset of $J/\psi$ Melting in Quark-Gluon Fluid at RHIC

abstract:
  A strong $J/\psi$ suppression in central Au+Au collisions has been observed
by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). We
develop a hydro+$J/\psi$ model in which hot quark-gluon matter is described by
the full (3+1)-dimensional relativistic hydrodynamics and $J/\psi$ is treated
as an impurity traversing through the matter. The experimental $J/\psi$
suppression pattern in mid-rapidity is reproduced well by the sequential
melting of $\chi_{\rm c}$, $\psi'$, and $J/\psi$ in dynamically expanding
fluid. The melting temperature of directly produced $J/\psi$ is well
constrained by the participant-number dependence of the $J/\psi$ suppression
and is found to be about $2.T_{\rm c}$ with $T_{\rm c}$ being the
pseudo-critical temperature.


title: Light vector hybrid states via QCD sum rules

abstract:
  Vector hybrid states with light quarks $u,d,s$ are investigated via QCD sum
rules. The results show that the masses of the $q{\bar q}g$ $(q=u,d)$, $q{\bar
s}g$, and $s{\bar s}g$ states with $J^{PC}=1^{--}$ are about 2.3-2.4, 2.3-2.5,
and 2.5-2.6 GeV, respectively. It suggests that the recently discovered Y(2175)
could not be a pure $s{\bar s}g$ vector hybrid state.


title: Low-energy neutrinos at off-axis from a standard beta-beam

abstract:
  We discuss a scenario to extract up to 150 MeV neutrinos at a standard
beta-beam facility using one and two detectors off-axis. In particular we show
that the high-energy component of the neutrino fluxes can be subtracted through
a specific combination of the response of two off-axis detectors. A systematic
analysis of the neutrino fluxes using different detector geometries is
presented, as well as a comparison with the expected fluxes at a low-energy
beta-beam facility. The presented option could offer an alternative way to
perform low-energy neutrino experiments.


title: Bound on minimal universal extra dimensions from Bbar -> X_s gamma

abstract:
  We reexamine the constraints on universal extra dimensional models arising
from the inclusive radiative Bbar -> X_s gamma decay. We take into account the
leading order contributions due to the exchange of Kaluza-Klein modes as well
as the available next-to-next-to-leading order corrections to the Bbar -> X_s
gamma branching ratio in the standard model. For the case of one large flat
universal extra dimension, we obtain a lower bound on the inverse
compactification radius 1/R > 600 GeV at 95% confidence level that is
independent of the Higgs mass.


title: Intrinsic transverse momentum in di-hadron correlations

abstract:
  We study di-hadron correlations in proton-proton collisions at $\sqrt{s} =
200$ GeV and interpret experimental data in terms of a fragmentation width and
a momentum imbalance. A fragmentation width of $580 \pm 50$ GeV/c is obtained,
and the measured momentum imbalance gives an `intrinsic' transverse momentum
width of partons in the proton of $2.6 \pm 0.2$ GeV/c. Consequences to heavy
ion collisions are discussed.


title:
Phenomenological insight into JLab proton polarization data puzzle by
  deuteron impulse approximation

abstract:
  The non-relativistic impulse approximation of deuteron electromagnetic form
factors is used to investigate the space-like region behavior of the proton
electric form factor in regard of the two contradictory experimental results
extracted either from Rosenbluth separation method or from recoil proton JLab
polarization data.


title:
Flavor-Changing Top Quark Rare Decays in the Littlest Higgs Model with
  T-Parity

abstract:
  We analyze the rare and flavor changing decay of the top quark into a charm
quark and a gauge boson in the littlest Higgs model with T-parity (LHT). We
calculate the one-loop level contributions from the T-parity odd mirror quarks
and gauge bosons. We find that the decay $t\to c V, (V=g,\gamma,Z)$ in the LHT
model can be significantly enhanced relative to those in the Standard Model.
Our numerical results show that the top quark FCNC decay can be as large as
$Br(t\to cg)\sim 10^{-2}$, $Br(t\to cZ)\sim 10^{-5}$ and $Br(t\to c\gamma)\sim
10^{-7}$ in the favorite parameter space in the LHT model.