title:
Contribution of the main radiative corrections to anomalous quartic
  constants in process gamma-gamma-->WW

abstract:
  Evaluation of anomalous couplings in the $\gamma\gamma\to W^+W^-$ process
needs to calculate the cross section $\sigma(W^+W^-)$ with a high precision.
Therefore one has to consider the main contribution of high order effects. In
this paper contributions of anomalous quartic boson interaction given by ${\cal
L}_0$, ${\cal L}_c$, $\tilde{{\cal L}}_0$ are analyzed in high-energy region.
Influence of high order effects is studed in dependences of $\sigma(W^+W^-)$ on
anomalous constants and contour plots with statistical error $2\delta$.


title: CP-violating asymmetry in $\Lambda\to p\pi$ in the Skyrme model

abstract:
  We study the CP-violating asymmetry in nonleptonic decay $\Lambda\to p\pi$.
By employing the Skyrme model to calculate this decay amplitude contributed by
the gluonic diploe operator, we find a possible large CP-violating asymmetry
could be expected, which is consistent with the previous study.


title: Leptogenesis from Split Fermions

abstract:
  We present a new type of leptogenesis mechanism based on a two-scalar
split-fermions framework. At high temperatures the bulk scalar vacuum
expectation values (VEVs) vanish and lepton number is strongly violated. Below
some temperature, $T_c$, the scalars develop extra dimension dependent VEVs.
This transition is assumed to proceed via a first order phase transition. In
the broken phase the fermions are localized and lepton number violation is
negligible. The lepton-bulk scalar Yukawa couplings contain sizable CP phases
which induce lepton production near the interface between the two phases. We
provide a qualitative estimation of the resultant baryon asymmetry which agrees
with current observation. The neutrino flavor parameters are accounted for by
the above model with an additional approximate U(1) symmetry.


title: Noncommutative QCD corrections to the gluonic decays of heavy quarkonia

abstract:
  We compute the Noncommutative QCD (NCQCD) contributions to the three gluon
decay modes of heavy quarkonia. For triplet quarkonia (ortho-quarkonia), the
NCQCD correction to the QCD three gluon decay mode, like the standard model
contribution, is infrared finite. In the case of singlet quarkonia
(para-quarkonia), whose QCD three gluon decay mode has infrared singularities
which are removed using one-loop corrections to the two gluon mode, we find
that NCQCD contribution is also infrared finite. The calculations are performed
in the weak binding limit and do not require the introduction of additional
effective couplings.


title: The narrow width of the \Theta^+ - a possible explanation

abstract:
  The narrow width of the exotic narrow baryon resonance $\Theta^+$ might be
explained by mixing between the two nearly degenerate states that arise in
models with two diquarks and an antiquark. The only open $\Theta^+$ decay
channel is $KN$. When two states both coupled to a single dominant decay mode
are mixed by the loop diagram via this decay mode, diagonalization of the loop
diagram decouples one mass eigenstate from this decay mode as in some
treatments of the $\rho-\pi$ decay from the mixed singlet-octet $\omega-\phi$
system, the $K^* -\pi$ decay of the strange axial vector mesons and the $NK$
couplings of some baryons. This mechanism can explain the narrow width and weak
coupling of $\Theta^+ \to KN$ while allowing a relatively large production
cross section from $K^*$ exchange. Interesting tests are suggested in $K^-p$
reactions where backward kaon production must go by exotic baryon exchange.


title: The Type-II Singular See-Saw Mechanism

abstract:
  The singular see-saw mechanism is a variation of the see-saw mechanism
whereby the right-chiral neutrino Majorana mass matrix is singular. Previous
works employing the singular see-saw mechanism have assumed a vanishing
left-chiral Majorana mass matrix. We study the neutrino spectrum obtained under
a singular see-saw mechanism when the left-chiral neutrinos possess a non-zero
Majorana mass matrix. We refer to this as the type-II singular see-saw
mechanism. The resulting neutrino spectrum is found to be sensitive to the
hierarchy of the Dirac and Majorana mass scales used and we explore the
phenomenological consequences of the candidate hierarchies. The compatibility
of the resulting spectra with the body of neutrino oscillation data is
discussed. It is found that neutrino mass matrices with this structure result
in 3+1 or 2+2 neutrino spectra, making it unlikely that this mass matrix
structure is realized in nature. If the left-chiral Majorana mass matrix is
also singular we show that a type-II singular see-saw mechanism can realize a
spectrum of one active-sterile pseudo-Dirac neutrino in conjunction with two
active Majorana neutrinos effectively decoupled from the sterile sector. This
realizes a scheme discussed in the literature in relation to astrophysical
neutrino fluxes.


title: Threshold production of the $\Theta^+$ in a polarized proton reaction

abstract:
  We compute cross sections of $\Theta^+$ production near threshold for a
polarized proton reaction, $\vec p \vec p \to \Sigma^+ \Theta^+$ which was
recently proposed to determine unambiguously the parity of $\Theta^+$. Within
theoretical uncertainties cross sections for the allowed spin configuration are
estimated; it is of order of one microbarn for the positive parity $\Theta^+$
and about 1/10 microbarn for the negative parity $\Theta^+$ in the threshold
energy region where the s-wave component dominates.


title: Stability of color-flavor locked strangelets

abstract:
  The stability of color-flavor locked (CFL) strangelets is studied in the
three-flavor Nambu--Jona-Lasinio model. We consider all quark flavors to be
massless, for simplicity. By making use of the multiple reflection expansion,
we explicitly take into account finite size effects and formulate the
thermodynamic potential for CFL strangelets. We find that the CFL gap could be
large enough so that the energy per baryon number of CFL strangelets is greatly
affected. In addition, if the quark-quark coupling constant is larger than a
certain critical value, there is a possibility of finding absolutely stable CFL
strangelets.


title: Skyrmion formation in 1+1 dimensions with chemical potential

abstract:
  Formation of topological objects during phase transitions has been discussed
extensively in literature. In all these discussions defects and anti-defects
form with equal probabilities. In contrast, many physical situations, such as
formation of baryons in relativistic heavy-ion collisions at present energies,
flux tube formation in superconductors in the presence of external magnetic
field, and formation of superfluid vortices in a rotating vessel, require a
mechanism which can bias (say) defects over anti-defects. Such a bias can
crucially affect defect-anti-defect correlations, apart from its effects on
defect density. In this paper we initiate an investigation for the basic
mechanism of biased formation of defects. For Skyrmions in 1+1 dimensions, we
show that incorporation of a chemical potential term in the effective potential
leads to a domain structure where order parameter is spatially varying. We show
that this leads to biased formation of Skyrmions.


title: Measuring Neutrino Mixing Angles at LHC

abstract:
  We study an MSSM model with bilinear R-parity violation which is capable of
explaining neutrino data while leading to testable predictions for ratios of
LSP decay rates. Further, we estimate the precision with which such a
measurement could be carried out at the LHC.


title: Hunting a light CP-violating Higgs via diffraction at the LHC

abstract:
  We study the central diffractive production of the (three neutral) Higgs
bosons, with a rapidity gap on either side, in an MSSM scenario with
CP-violation. We consider the bb-bar and tautau-bar decay for the light H_1
boson and the four b-jet final state for the heavy H_2 and H_3 bosons, and
discuss the corresponding backgrounds. A direct indication of the existence of
CP-violation can come from the observation of either an azimuthal asymmetry in
the angular distribution of the tagged forward protons (for the exclusive pp ->
p+H+p process) or of a sin(2phi) contribution in the azimuthal correlation
between the transverse energy flows in the proton fragmentation regions for the
process with the diffractive dissociation of both incoming protons (pp ->
X+H+Y). We emphasise the advantage of reactions with the rapidity gaps (that is
production by the pomeron-pomeron fusion) to probe CP parity and to determine
the quantum numbers of the produced central object.


title: Theory of radiative and rare B decays

abstract:
  We present a concise theoretical overview of radiative and rare B decays
mediated by flavour-changing neutral-current transitions of the type
b->s(d)gamma and b->s(d)l+l-.


title: Order p^6 chiral couplings from the scalar K Pi form factor

abstract:
  Employing results from a recent determination of the scalar KPi form factor
F_0^KPi within a coupled channel dispersion relation analysis \cite{JOP01}, in
this work we calculate the slope and curvature of F_0^KPi(t) at zero momentum
transfer. Knowledge of the slope and curvature of the scalar KPi form factor,
together with a recently calculated expression for F_0^KPi(t) in chiral
perturbation theory at order p^6, enable to estimate the O(p^6) chiral
constants C_12^r=(0.3 +- 5.4)10^-7 and (C_12^r+C_34^r)=(3.2 +- 1.5)10^-6. Our
findings also allow to estimate the contribution coming from the C_i to the
vector form factor F_+^KPi(0) which is crucial for a precise determination of
|V_us| from K_l3 decays. Our result F_+^KPi(0)|_C_i^r=-0.018 +- 0.009, though
inflicted with large uncertainties, is in perfect agreement with a previous
estimate by Leutwyler and Roos already made twenty years ago.


title:
Jlab Proton Polarization Data in Aspect to Global Unitary and Analytic
  Model of Nucleon Electromagnetic Structure

abstract:
  It is demonstrated that new JLAB proton polarization data, which are in a
rather strong disagreement with the proton electric form factor data in the
space-like region obtained by Rosenbluth technique, are consistent with all
known form factor properties, including also the QCD asymptotics, but they
require an existence of a zero (i.e. a diffraction minimum) around $t$=15
GeV$^2$ of the proton electric form factor. The latter leads to a change of our
knowledge about the charge distribution inside of the proton.


title: Effects of degenerate sterile neutrinos on the supernova neutrino flux

abstract:
  We consider the possibility that there exist sterile neutrinos which are
closely degenerate in mass with the active neutrinos and mixed with them. We
investigate the effects of this kind of active-sterile neutrino mixing on the
composition of supernova neutrino flux at the Earth. If an adiabatic
MSW-transition between active and sterile neutrinos takes place, it could
dramatically diminish the electron neutrino flux.


title: Narrow width pentaquarks

abstract:
  A general study of pentaquarks built with four quarks in a L=1 state and an
antiquark in S-wave shows that several of such states are forbidden by a
selection rule, which holds in the limit of flavour symmetry, to decay into a
baryon and a meson final state. We identify the most promising \bar{10}
multiplet for the classification of the Theta^+ and Xi^{--} particles recently
discovered with the prediction of a narrow width for both of them.


title: Dirac theory within the Standard-Model Extension

abstract:
  The modified Dirac equation in the Lorentz-violating Standard-Model Extension
(SME) is considered. Within this framework, the construction of a hermitian
Hamiltonian to all orders in the Lorentz-breaking parameters is investigated,
discrete symmetries and the first-order roots of the dispersion relation are
determined, and various properties of the eigenspinors are discussed.


title: Geo-neutrinos, Mantle Circulation and Silicate Earth

abstract:
  In preparation to the experimental results which will be available in the
future, we consider geo-neutrino production in greater detail than in [F.
Mantovani et al., arXiv:hep-ph/0309013], putting the basis for a more refined
model. We study geo-neutrino production for different models of matter
circulation and composition in the mantle. By using global mass balance for the
Bulk Silicate Earth, the predicted flux contribution from distant sources in
the crust and in the mantle is fixed within +-15% (full range). A detailed
geological and geochemical investigation of the region near the detector has to
be performed, for reducing the flux uncertainty from fluctuations of the local
abundances to the level of the global geochemical error. A five-kton detector
operating over four years at a site relatively far from nuclear power plants
can measure the geo-neutrino signal with 5% accuracy (1 sigma). It will provide
a crucial test of the Bulk Silicate Earth and a direct estimate of the
radiogenic contribution to terrestrial heat.


title: Quantum groups and Cabibbo mixing

abstract:
  Treating the issue of hadron masses and mass relations by the use of quantum
groups U_q(su_n) taken as hadron flavor symmetries suggests, at least in the
case of baryons, a direct connection of the deformation parameter q with the
Cabibbo angle. We discuss possible manifestations of the Cabibbo mixing implied
by such connection, including unusual ones.


title:
Next-to-leading mass singularities in two-loop electroweak singlet form
  factors

abstract:
  We consider virtual electroweak corrections to the form factors for massless
chiral fermions coupling to an SU(2)xU(1) singlet gauge boson in the asymptotic
region $s\gg M_W^2$, where the invariant mass $s$ of the external gauge boson
is much higher than the weak-boson mass scale. Using the sector-decomposition
method we compute mass singularities, which arise as logarithms of $s/M_W^2$
and $1/\epsilon$ poles in $D=4-2\epsilon$ dimensions, to one- and two-loop
next-to-leading logarithmic accuracy. In this approximation we include all
contributions of order $\alpha^l \epsilon^{k} log^{j+k}(s/M_W^2)$, with $l=1,2$
and $j=2l,2l-1$. We find that the electroweak two-loop leading- and
next-to-leading-logarithmic mass singularities can be written in a form that
corresponds to a generalization of Catani's formula for massless QCD.


title:
Search for Higgs Bosons Decay $H\to \gamma\gamma$ Using Vector Boson
  Fusion

abstract:
  The sensitivity of the ATLAS experiment to low mass SM Higgs produced via
Vector Boson Fusion mechanism with $H\to \gamma\gamma$ is invest igated. A cut
based event selection has been chosen to optimize the expected signal
significance with this decay mode. A signal significance of 2. 2$ \sigma$ may
be achieved for $M_H=130 \gev$ with 30 fb$^{-1}$ of accumulated luminosity.


title:
Gauge-invariant Lagrangian of the soft-collinear effective theory and
  its application to soft-collinear currents

abstract:
  We construct the soft-collinear effective Lagrangian which is manifestly
gauge invariant order by order. Field redefinitions of collinear gauge fields
and a proper decomposition of quark fields are necessary to make the Lagrangian
gauge invariant. We can obtain the effective Lagrangian order by order in
SCET_I and SCET_II by adopting appropriate power counting methods. Various
types of current operators can be investigated using this formalism, and we
choose the soft-collinear current as a specific example to present explicit
radiative corrections. The hard-collinear, collinear, and ultrasoft modes in
SCET_I and the collinear and soft modes in SCET_II reproduce the infrared
divergences of the full theory and the matching can be performed. We show our
results explicitly using two types of regularization schemes. The first scheme
is the dimensional regularization both for the ultraviolet and the infrared
divergences with on-shell particles, and the second scheme is regulating the
infrared divergence with the off-shellness of external particles. We discuss
other types of operators in terms of the two-step matching.


title:
Analytical Result for the Two-Loop QCD Correction to the Decay H --> 2
  gamma

abstract:
  An analytic formula for the two-loop QCD correction of the decay H --> 2
gamma is presented. To evaluate all master integrals a `Risch-like' algorithm
was exploited.


title:
Some aspects of radiative corrections and non-decoupling effects of
  heavy Higgs bosons in two Higgs Doublet Model

abstract:
  The possibility of having relatively large non-decoupling effects of the
heavy Higgs particles within the two-Higgs doublet extension of the electroweak
standard model is briefly discussed and demonstrated on an example of the
one-loop amplitude of the process e^+e^- -> W^+W^-


title: Complete one--loop corrections to e+e- -> sf_i sf_j

abstract:
  We have calculated the complete one-loop corrections to the sfermion pair
production process e+e- -> sf_i sf_j (f = t, b, tau, tau-neutrino) in the
Minimal Supersymmetric Standard Model. Our results also include the previously
calculated SUSY-QCD corrections. We present the details of the renormalization
scheme used. It is found that the weak corrections are of the same magnitude as
the SUSY-QCD corrections at higher energies (sqrt(s) ~ 1TeV). At these energies
the main part of the weak corrections stems from the box contribution. This is
best seen in sneutrino production.


title:
Electroweak radiative corrections to hadronic precision observables at
  TeV energies

abstract:
  We illustrate the impact of full one-loop weak corrections onto b-jet-,
prompt-photon- and Z-production at Tevatron and Large Hadron Collider (LHC)


title:
Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p
  lepton anti-neutrino

abstract:
  The exclusive semileptonic heavy baryon decay \Lambda_b\to p l\bar\nu is
investigated using light-cone sum rule method in both full QCD and HQET. The
form factors describing the decay are calculated and used to predict the decay
width and differential distribution. The total decay width obtained from full
QCD is in agreement with the previous theoretical predictions while the HQET
result are typically one order smaller. Both results are consistent with the
experimental upper limit and can be compared to the refined experimental data
in the future.


title:
Dynamical Theory of Phase Transitions and Topological Defect Formation
  in the Early Universe

abstract:
  We review the current issues of nonequilibrium phase transitions, in
particular, in the early universe. Phase transitions cannot maintain thermal
equilibrium and become nonequilibrium when the thermal relaxation time scale is
greater than the dynamical time scale. Nonequilibrium phase transitions would
have happened in certain evolution stages of the early universe because the
rapid expansion quenched matter fields. We apply the recently introduced
Liouville-von Neumann method, another canonical method, to nonequilibrium phase
transitions in the Minkowski spacetime and find the scaling behavior of domain
sizes. Topological defects are thus determined by the dynamical processes of
nonequilibrium phase transitions. However, the expansion of the universe
freezes domain growth in the comoving frame and thus leads to a scale-invariant
domain size. We also discuss the physical implications of nonequilibrium phase
transitions in the early universe.


title: Baryon Magnetic Moments in Relativistic Quark Models

abstract:
  It is shown that the phenomenological description of the baryon magnetic
moments in the quark model carries over to the Poincar\'e covariant extension
of the model. This applies to all the three common forms of relativistic
kinematics with structureless constituent currents, which are covariant under
the corresponding kinematic subgroups. In instant and front form kinematics the
calculated magnetic moments depend strongly on the constituent masses, while in
point form kinematics the magnetic moments are fairly insensitive to both the
quark masses and the wave function model. The baryon charge radii and magnetic
moments are determined in the different forms of kinematics for the
light-flavor, strange and charm hyperons. The wave function model is determined
by a fit to the electromagnetic form factor of the proton.


title: What are the Bounds on Space-Time Noncommutativity?

abstract:
  In this article we consider the bounds on the noncommutative nature of
space-time. We argue that these bounds are extremely model dependent. In the
only phenomenologically viable framework, i.e. when the fields are taken to be
in the enveloping of the Lie algebra, the constraints are fairly loose and only
of the order of a few TeV.


title: A Proposal About the Rest Masses of Quarks

abstract:
  From the Dirac sea concept, we infer that a body center cubic quark lattice
exists in the vacuum. Adapting the electron Dirac equation, we get a special
quark Dirac equation. Using its low-energy approximation, we deduced the rest
masses of the quarks: m(u)=930 Mev, m(d)=930 Mev, m(s)=1110 Mev, m(c)=2270 Mev
and m(b)=5530 Mev. We predict new excited quarks d$_S$(1390), u$_C$(6490) and
d$_b$(9950).


title: Neutrino Oscillations as a Probe of Dark Energy

abstract:
  We consider a class of theories in which neutrino masses depend significantly
on environment, as a result of interactions with the dark sector. Such theories
of mass varying neutrinos (MaVaNs) were recently introduced to explain the
origin of the cosmological dark energy density and why its magnitude is
apparently coincidental with that of neutrino mass splittings. In this Letter
we argue that in such theories neutrinos can exhibit different masses in matter
and in vacuum, dramatically affecting neutrino oscillations. Both long and
short baseline experiments are essential to test for these interactions. As an
example of modifications to the standard picture, we consider simple models
which may simultaneously account for the LSND anomaly, KamLAND, K2K and studies
of solar and atmospheric neutrinos, while providing motivation to continue to
search for neutrino oscillations in short baseline experiments such as BooNE.


title:
Are there significant scalar resonances in $B^{-}\to D^{(*)0} K^{-}
  {K}^{0}$ decays?

abstract:
  We study the indication of large different branching ratios between $B^{-}\to
D^{(*)0} K^{-} {K}^{0}$ and $\bar{B}_{d}\to D^{(*)+} K^{-} {K}^{0}$ observed by
Belle. Interestingly, the same situation is not found in the decays $B\to
D^{(*)} K^{-} {K}^{*0}$. If there exist no intermediate resonances in the
decays $B^{-}\to D^{(*)0} K^{-} {K}^{0}$, a puzzle will be arisen. We find that
the color-suppressed processes $B^{-}\to D^{(*)0}a^{-}_{0}(1450)$ with
$a^{-}_{0}(1450)\to K^{-} {K}^{0}$ could be one of the candidates to enhance
the BRs of $B^{-}\to D^{(*)0} K^{-} {K}^{0}$. Our conjecture can be examined by
the Dalitz plot technique and the analysis of angular dependence on $K^{-}
{K}^{0}$ state at $B$ factories.


title: Guesswork for Dirac and Majorana neutrino mass matrices

abstract:
  In the framework of seesaw mechanism with three neutrino flavors, we propose
tentatively an efficient parametrization for the spectra of Dirac and
righthanded Majorana neutrino mass matrices in terms of three free parameters.
Two of them are related to (and determined by) the corresponding parameters
introduced previously for the mass spectra of charged leptons and up and down
quarks. The third is determined from the experimental estimate of solar $\Delta
m^2_{21}$. Then, the atmospheric $\Delta m^2_{32}$ is {\it predicted} close to
its experimental estimation. With the use of these three parameters all light
active-neutrino masses $ m_1 < m_2 < m_3$ and heavy sterile-neutrino masses $
M_1 < M_2 < M_3$ are readily evaluated. The latter turn out much more {\it
hierarchical} than the former. The lightest heavy mass $ M_1$ comes out to be
of the order $O(10^6 {\rm GeV})$ so, it is too light to imply that the
mechanism of baryogenesis through thermal leptogenesis might work.


title: On Neutrino Absorption Tomography of the Earth

abstract:
  We study the passage of UHE neutrinos through the Earth in order to perform
an absorption tomography of its inner structure. The aim of this work is to
study the extraction methods of the Earth's density, in this conditions, we do
not need to implement a realistic Monte Carlo simulation, as we are only
interested in comparing the goodness of a standard method \cite{ralston} with
the one we propose. The Earth's density is reconstructed using the 2-d Radon
transform and we compare the density obtained considering neutral current
regeneration through the complete transport equation, with the one obtained
making use of the effective cross section approximation (standard method). We
see that the effective cross section leads in general to inaccurate results,
especially for flat initial neutrino fluxes, while the full transport equation
method works regardless of the initial flux. Finally, an error propagation
analysis made for different uncertainties in the surviving neutrino flux shows
that the recovered density presents a percentage uncertainty less than two
times the uncertainty in the flux.


title: The Hagedorn Temperature and Partition Thermodynamics

abstract:
  We review the resonance gas formalism of hadron thermodynamics and recall
that an exponential increase of the resonance spectrum leads to a limiting
temperature of hadronic matter. We then show that the number p(n) of ordered
partitions of an integer n grows exponentially with n and satisfies the integer
counterpart of the statistical bootstrap equation. Considering the set of all
partitions as a Gibbs ensemble provides a partition thermodynamics which is
also governed by a limiting temperature, determined by the combinatorial
structure of the problem. Further associating intrinsic quantum numbers to
integers results in a phase diagram equivalent to that found in QCD for
hadronic matter as function of temperature and baryochemical potential.


title: Charm production in diffractive deep inelastic scattering

abstract:
  The diffractive open charm production is computed in perturbative QCD
formalism and in the Regge approach. The results are compared with recent data
on charm diffractive structure function measured at DESY-HERA. Our results
demonstrate that this observable can be useful to discriminate the QCD
dynamics.


title: Phenomenology of the little flavon model

abstract:
  The phenomenology of the little-flavon model is discussed. Flavor changing
neutral current and lepto-quark compositeness set the most stringent bounds to
the lowest possible value for the scale at which the flavons arise as
pseudo-Goldstone bosons.


title: The family of strange multiquarks related to the Ds(2317) and Ds(2457)

abstract:
  I study the Ds(2317) and Ds(2457) discovered at BABAR, CLEO and BELLE, and
find that they belong to a class of strange S=-1 tetraquarks and pentaquarks,
which is equivalent to the class of kaonic molecules bound by short range
attraction. In this class of hadrons a kaon is strongly trapped by a s-wave
meson or baryon. To describe this class of multiquarks the Resonating Group
Method is applied to a standard quark model with chiral symmetry breaking, and
the short range kaon-meson(baryon) interactions are extracted. A criterion is
derived to classify the attractive channels. I conclude that the mesons Bs(0+),
Bs(1+), and the baryons Omega cc, Omega cb, Omega bb clearly belong to the new
hadronic class of the Ds(2317) and Ds(2457). The hadrons f0(980), Lambda, Sigma
c, Sigma b possibly belong to a related family.


title: Determining Pentaquark Quantum Numbers from Strong Decays

abstract:
  Assuming that the recently observed $\Theta^+$ and $\Xi^{--}$ are members of
an anti-decuplet of SU(3), decays to ground state baryons and mesons are
calculated using an effective Lagrangian which incorporates chiral and SU(3)
symmetry. We consider the possible quantum number assignments $J^\Pi
={1/2}^\pm,{3/2}^\pm$ and calculate ratios of partial widths. The branching
ratios of exotic cascades can be used to discriminate between even and odd
parity pentaquarks.


title:
Low-energy effective theory from a non-trivial scalar background in
  extra dimensions

abstract:
  Consequences of a non-trivial scalar field background for an effective 4D
theory were studied in the context of one compact extra dimension. The periodic
background that appears within the (1+4)-dimensional $\phi^4$ theory was found
and the excitations above the background (and their spectrum) were determined
analytically. It was shown that the presence of the non-trivial solution leads
to the existence of a minimal size of the extra dimension that is determined by
the mass parameter of the scalar potential. It was proved that imposing
orbifold antisymmetry boundary conditions allows us to eliminate a negative
mass squared Kaluza-Klein ground-state mode that otherwise would cause an
instability of the system. The localization of fermionic modes in the presence
of the non-trivial background was discussed in great detail varying the size of
the extra dimension and the strength of the Yukawa coupling. A simple exact
solution for the zero-mode fermionic states was found and the solution for
non-zero modes in terms of trigonometric series was constructed. The fermionic
mass spectrum, which reveals a very interesting structure, was found
numerically. It was shown that the natural size of the extra dimension is twice
as large as the period of the scalar background solution.


title: Unification of Couplings and Proton Decay in SUSY GUTs

abstract:
  We show that gauge couplings unify more precisely in the region of SUSY
parameter space already preferred by Yukawa unification. While proton decay due
to dimension 5 operators is maximally suppressed in this region, the
contribution from dimension 6 operators is enhanced as a consequence of lower
unification scale.


title:
Evidence for Factorization in Three-body $\bar B\to D^{(*)} K^- K^0$
  Decays

abstract:
  Motivated by experimental results on $\bar B\to D^{(*)}K^-K^{0}$, we use a
factorization approach to study these decays. Two mechanisms concerning kaon
pair production arise: current-produced (from vacuum) and transition (from the
$B$ meson). The kaon pair in the $\bar B {}^0\to D^{(*)+}K^-K^0$ decays can be
produced only by the vector current (current-produced), whose matrix element
can be extracted from $e^+e^-\to K\bar K$ processes via isospin relations. The
decay rates obtained this way are in good agreement with experiment. The
$B^-\to D^{(*)0}K^-K^0$ decays involve both current-produced and transition
processes. By using QCD counting rules and the measured $B^-\to D^{(*)0} K^-
K^0$ decay rates, the measured decay spectra can be understood.


title: Isolated Lepton Production at Colliders

abstract:
  The production of isolated leptons with high transverse momentum in high
energy e-e, p-p or e-p collisions is reviewed. The leptons are produced either
through boson splitting or by boson-boson collision and yield experimentally
simple and spectacular topologies which can be exploited to validate the
Standard Model or to search for new phenomena.


title: Theoretical Aspects of Higgs Physics at the LHC

abstract:
  The strategies recently developed to study Higgs boson properties at the LHC
are reviewed. It is shown how to obtain model-independent determinations of
couplings to fermions and gauge bosons by exploiting different production and
decay channels. We consider the case of Weak Boson Fusion Higgs production with
H decaying into b anti-b


title:
Investigation of some processes of multiple lepton and boson birth on
  linear colliders of polarized photons

abstract:
  The main possibilities of investigation of leptons and bosons birth in
interaction of polarized photons are considered. The usage of $\gamma \gamma
\to f \bar{f} [+\gamma]$ reactions for the luminosity measurement on linear
photon collider is analyzed. The achievable precision of the luminosity
measuring is considered and calculated. The first-order QED correction to
$\gamma\gamma\to l \bar{l}$ scattering is analyzed. Differential cross section
of process $\gamma\gamma\to 4l$ is calculated using the helicity amplitudes
method as well as covariant method of precision calculations. All possible
polarization states of interacting particles are investigated under different
cuts of TESLA kinematics. For the detection of deviations from SM predictions
at linear $\gamma\gamma$ colliders with centre of mass energies running to $1
TeV$ the influence of three possible anomalous couplings on the cross sections
of $W^+W^-$ productions has been investigated. The significant discrimination
between various anomalous contributions is discovered. The main contribution of
high order electroweak effects is considered.


title: Lepton Dipole Moments in Extended Technicolor Models

abstract:
  We analyze the diagonal and transition magnetic and electric dipole moments
of charged leptons in extended technicolor (ETC) models, taking account of the
multiscale nature of the ETC gauge symmetry breaking, conformal (walking)
behavior of the technicolor theory, and mixing in the charged-lepton mass
matrix. We show that mixing effects dominate the ETC contributions to charged
lepton electric dipole moments and that these can yield a value of |d_e|
comparable to the current limit. The rate for mu to e gamma can also be close
to its limit. From these and other processes we derive constraints on the
charged lepton mixing angles. The constraints are such that the ETC
contribution to the muon anomalous magnetic moment, which includes a
significant lepton mixing term, can approach, but does not exceed, the current
sensitivity level.


title: Prospects for Pentaquark Production at Meson Factories

abstract:
  Following Rosner [hep-ph/0312269], we consider B-decay production channels
for the exotic I=0 and $I=3/2$ pentaquarks that have been recently reported. We
also discuss new search channels for isovector pentaquarks, such as the
$\Theta^{*++} (\bar s duuu)$, that are generically present in chiral soliton
models but were not observed in recent experiments. Futhermore, we argue that
weak decays of charmed baryons, such as the $\Lambda_c^+$ and $\Xi_c^0$,
provide another clean way of detecting exotic baryons made of light quarks
only. We also discuss discovery channels for charmed pentaquarks, such as the
isosinglet $\Theta_c^0 (\bar c udud)$, in weak decays of bottom mesons and
baryons. Finally, we discuss prospects for inclusive production of pentaquarks
in $e^+ e^-$ collisions, with associated production of particles carrying the
opposite baryon number.


title:
Black Hole Production in Particle Collisions and Higher Curvature
  Gravity

abstract:
  The problem of black hole production in transplanckian particle collisions is
revisited, in the context of large extra dimensions scenarios of TeV-scale
gravity. The validity of the standard description of this process (two
colliding Aichelburg-Sexl shock waves in classical Einstein gravity) is
questioned. It is observed that the classical spacetime has large curvature
along the transverse collision plane, as signaled by the curvature invariant
(R_ijkl)^2. Thus quantum gravity effects, and in particular higher curvature
corrections to the Einstein gravity, cannot be ignored. To give a specific
example of what may happen, the collision is re-analyzed in the
Einstein-Lanczos-Lovelock gravity theory, which modifies the Einstein-Hilbert
Lagrangian by adding a particular `Gauss-Bonnet' combination of curvature
squared terms. The analysis uses a series of approximations, which reduce the
field equations to a tractable second order nonlinear PDE of the Monge-Ampere
type. It is found that the resulting spacetime is significantly different from
the pure Einstein case in the future of the transverse collision plane. These
considerations cast serious doubts on the geometric cross section estimate,
which is based on the classical Einstein gravity description of the black hole
production process.


title: AdSS_5 Brane World Cosmology

abstract:
  The gravitational equations of the 5-dimensional analogue of the AdSS
space-time, where all the matter fields are confined on the 3-brane are
examined. The most general solutions are established in the generic case of a
non-Z_2-symmetric bulk. Constraining these solutions we derive a number of
remarkable metrics widely investigated in the literature. Finally, we make many
important conclusions about the viability of the presented scenario and
cosmology.


title: The Iancu-Mueller factorization and high energy asymptotic behaviour

abstract:
  We show that the Iancu-Mueller factorization has a simple interpretation in
the Reggeon - like technique based on the BFKL Pomeron. The formula for
calculating the high energy asymptotic behaviour for the colour dipole-dipole
amplitude is proposed which suggests a procedure to calculate this amplitude
through the solution to the Balitsky-Kovchegov non-linear equation. We confirm
the Iancu - Mueller result that a specific set of enhanced diagrams is
responsible for the high energy behaviour for fixed QCD coupling. However, it
is argued that in the case of running QCD coupling, this asymptotic behaviour
originates from the Balitsky-Kovchegov non-linear equation. A new solution to
the non-linear equation is found which leads to a different asymptotic
behaviour of the scattering amplitude even for fixed QCD coupling..


title: Two-loop QCD helicity amplitudes for massless quark-quark scattering

abstract:
  We present the two-loop helicity amplitudes for the scattering of massless
quarks in QCD. We use projector techniques to compute the coefficients of the
general four-quark amplitude at up to two-loops in conventional dimensional
regularisation and use these coefficients to derive the helicity amplitudes in
the 't Hooft-Veltman scheme. The structure of the infrared divergences agrees
with that predicted by Catani while expressions for the finite remainders for
$q \bar q \to Q\bar Q$ and the processes related by crossing symmetry are given
in terms of logarithms and polylogarithms that are real in the physical region.
We have checked that the interference of tree and two-loop helicity amplitudes,
summed over helicities and colours, reproduces the previous results for the
finite remainders for interference of tree and two-loop amplitudes given in
Refs. [1,2].


title:
The B^- -> phi phi K^- decay rate with phi phi invariant mass below
  charm treshold

abstract:
  We investigate the decay mechanism in the B^- -> phi phi K^- decay with the
phi phi invariant mass below the charm threshold and in the neighborhood of the
eta_c invariant mass region. Our approach is based on the use of factorization
model and the knowledge of matrix elements of the weak currents. For the B
meson weak transition we apply form factor formalism, while for the light
mesons we use effective weak and strong Lagrangians. We find that the dominant
contributions to the branching ratio come from the eta, eta' and eta(1490) pole
terms of the penguin operators in the decay chains B^- -> eta (eta', eta(1490))
K^- -> phi phi K^-. Our prediction for the branching ratio is in agreement with
the Belle's result.


title:
Perturbative and Nonperturbative Effects in Transverse Momentum
  Generation

abstract:
  The transverse momentum of a colour-singlet massive particle in a hadronic
collision is built up by two components, the perturbative effect of parton
branchings and the nonperturbative effect of primordial kT. In previous studies
of transverse momentum spectra for Z0 production at the Tevatron, the best fit
to the experimental data are given when the primordial kT is set to a much
higher value than what is expected considering the confinement of partons in
the proton. We here investigate the possibility that the reason for this is
that too few branchings are generated in showers, compared to the evolution
used in the tuning of parton densities. This could then be compensated by
increasing the value of Lambda_QCD. The study is done using the regular Pythia
showering routines and a new algorithm where the branchings are ordered in
transverse momentum pT^2 instead of virtuality Q^2.


title:
Kinematic selection criteria in a new resonance searches: Application to
  pentaquark states

abstract:
  In this note I recall some features of two-body decay kinematics which can be
effectively applied, in particular, in experimental searches for pentaquark
states.


title: The 4PI Effective Action for \phi^4 Theory

abstract:
  We work with $\phi^4$ theory and study the 4PI effective action at 3-loop
order. We discuss the relationship between the equations of motion obtained by
taking functional derivatives of the effective action with respect to the
variational parameters, and the Schwinger-Dyson (SD) equations. We show that
the equation obtained by differentiating with respect to the 2-point function
is identical to the SD equation for the 2-point function; differentiating with
respect to the 3-point function reproduces the SD equation for the 3-point
function, up to 1-loop order; and differentiating with respect to the 4-point
function reproduces the SD equation for the 4-point function, at the tree
level. These results establish a connection between two techniques for
performing non-equilibrium calculations, and provide a starting place for a
study of the gauge dependence of quantities derived from an $n$PI effective
action.


title: The Lorentz-violating Standard-Model Extension

abstract:
  Quantum-gravity effects are expected to be suppressed by the Planck mass. For
experimental progress it is therefore important to identify potential
signatures from Planck-scale physics that are amenable to ultrahigh-precision
tests. It is argued that minuscule violations of Lorentz and CPT symmetry are
candidate signals. In addition, theoretical and experimental aspects of the
Standard-Model Extension, which describes the emergent low-energy effects, are
discussed.


title: Phenomenological Constraints on Extra-Dimensional Scalars

abstract:
  We examine whether the ATLAS detector has sensitivity to extra-dimensional
scalars (as opposed to components of higher-dimensional tensors which look like
4D scalars), in scenarios having the extra-dimensional Planck scale in the TeV
range and $n \ge 2$ nonwarped extra dimensions. Such scalars appear as partners
of the graviton in virtually all higher-dimensional supersymmetric theories.
Using the scalar's lowest-dimensional effective couplings to quarks and gluons,
we compute the rate for the production of a hard jet together with missing
energy. We find a nontrivial range of graviscalar couplings to which ATLAS
could be sensitive, with experiments being more sensitive to couplings to
gluons than to quarks. Graviscalar emission increases the missing-energy signal
by adding to graviton production, and so complicates the inference of the
extra-dimensional Planck scale from an observed rate. Because graviscalar
differential cross sections resemble those for gravitons, it is unlikely that
these can be experimentally distinguished from one another should a missing
energy signal be observed.


title: A Constructive Critique of the Three Standard Systems

abstract:
  This is a broad and in part unconventional review of our current knowledge of
fundamental physics, emphasizing the potential for advances the LHC will open
up.


title: Chiral-Soliton Predictions for Exotic Baryons

abstract:
  We re-analyze the predictions of chiral-soliton models for the masses and
decay widths of baryons in the exotic antidecuplet of flavour SU(3). The
calculated ranges of the chiral-soliton moment of inertia and the \pi-nucleon
scattering \Sigma term are used together with the observed baryon octet and
decuplet mass splittings to estimate 1430 MeV < m_{\Theta^+} < 1660 MeV} and
1790 MeV < m_{\Xi^{--}} < 1970 MeV. These are consistent with the masses
reported recently, but more precise predictions rely on ambiguous
identifications of non-exotic baryon resonances. The overall decay rates of
antidecuplet states are sensitive to the singlet axial-current matrix element
in the nucleon. Taking this from polarized deep-inelastic scattering
experiments, we find a suppression of the total \Theta^+ and \Xi^{--} decay
widths that may not be sufficient by itself to reproduce the narrow widths
required by experiments. We calculate SU(3) breaking effects due to
representation mixing and find that they tend to suppress the \Theta^+ decay
width, while enhancing that of the \Xi^{--}. We predict light masses for some
exotic 27 baryons, including the I=1, J^P={3/2}^+ \Theta^+ and I=3/2,
J^P={3/2}^+ \Xi multiplets, and calculate their decay widths.


title: Resummation for the Tevatron and LHC boson production at small x

abstract:
  Analysis of small-x semi-inclusive DIS hadroproduction suggests that multiple
parton radiation leads to a broadening of transverse momentum distributions
beyond that predicted by a straightforward calculation in the
Collins-Soper-Sterman formalism. This effect can be modeled by a modification
of the resummed form factor in the small-x region. We discuss the impact of
such a modification on the production of electroweak bosons at hadron-hadron
colliders. We show that if substantial small-x broadening is observed in
forward Z boson production in the Tevatron Run-2, it would strongly affect
predicted transverse momentum distributions for W, Z, and Higgs boson
production at the Large Hadron Collider.


title:
A Comparison of different measures for dynamical event-mean transverse
  momentum fluctuation

abstract:
  Various measures for the dynamical event-mean transverse momentum fluctuation
are compared with the real dynamical fluctuation using a Monte Carlo model. The
variance calculated from the G-moments can reproduce the dynamical variance
well, while those obtained through subtraction procedures are approximate
measures for not very low multiplicity. The Phi_pt can also serve as an
approximate measure after divided by the square root of mean multiplicity.


title: Deep electroproduction of exotic hybrid mesons

abstract:
  We evaluate the leading order amplitude for the deep exclusive
electroproduction of an exotic hybrid meson in the Bjorken regime. We show
that, contrary to naive expectation, this amplitude factorizes at the twist 2
level and thus scales like usual meson electroproduction when the virtual
photon and the hybrid meson are longitidinally polarized. Exotic hybrid mesons
may thus be studied in electroproduction experiments at JLAB, HERA (HERMES) or
CERN (COMPASS).


title: Exclusive photoproduction of a heavy vector meson in QCD

abstract:
  The process of exclusive heavy vector meson photoproduction, gamma p -> V p,
is studied in the framework of QCD factorization. The mass of the produced
meson, V = Upsilon or J/Psi, provides a hard scale for the process. We
demonstrate, that in the heavy quark limit and at the one-loop order in
perturbation theory, the amplitude factorizes in a convolution of a
perturbatively calculable hard-scattering amplitude with the generalized parton
densities and the nonrelativistic QCD matrix element <O_1>_V. We evaluate the
hard scattering amplitude at one-loop order and compare the data with
theoretical predictions using an available model for generalized parton
distributions.


title: Lepton Flavour Violation in a Class of Lopsided SO(10) Models

abstract:
  A class of predictive SO(10) grand unified theories with highly asymmetric
mass matrices, known as lopsided textures, has been developed to accommodate
the observed mixing in the neutrino sector. The model class effectively
determines the rate for charged lepton flavour violation, and in particular the
branching ratio for $\mu -> e \gamma$, assuming that the supersymmetric GUT
breaks directly to the constrained minimal supersymmetric standard model
(CMSSM). We find that in light of the combined constraints on the CMSSM
parameters from direct searches and from the WMAP satellite observations, the
resulting predicted rate for $\mu -> e \gamma$ in this model class can be
within the current experimental bounds for low $\tan \beta$, but that the next
generation of $\mu -> e \gamma$ experiments would effectively rule out this
model class if LFV is not detected.


title: Constraining Z' From Supersymmetry Breaking

abstract:
  We suggest and analyze a class of supersymmetric Z' models based on the gauge
symmetry U(1)_x = x Y - (B-L), where Y is the Standard Model hypercharge. For 1
< x < 2, the U(1)_x D-term generates positive contributions to the slepton
masses, which is shown to solve the tachyonic slepton problem of anomaly
mediated supersymmetry breaking (AMSB). The resulting models are very
predictive, both in the SUSY breaking sector and in the Z' sector. We find M_Z'
= (2-4) TeV and the Z-Z' mixing angle \xi = 0.001. Consistency with symmetry
breaking and AMSB phenomenology renders the Z' "leptophobic", with Br(Z' -> e^+
e^-) = (1-1.6)% and Br(Z' -> q q-bar) = 44%. The lightest SUSY particle is
either the neutral Wino or the sneutrino in these models.


title: Contributions of $e^+e^-\to P(S)\gamma$ processes to muon $g-2$

abstract:
  The present situation on a comparison of theoretical evaluation of the muon
anomalous magnetic moment with experimental one is roughly reviewed. Then by
means of a recently elaborated unitary and analytic model of the meson
transition form factors the contributions of $e^+e^-\to P(S) \gamma$ processes
to muon $g-2$ is estimated.


title:
Constraining neutrino magnetic moment with solar and reactor neutrino
  data

abstract:
  We use solar neutrino data to derive stringent bounds on Majorana neutrino
transition moments (TMs). Such moments, if present, would contribute to the
neutrino-electron scattering cross section and hence alter the signal observed
in Super-Kamiokande. Using the latest solar neutrino data, combined with the
results of the reactor experiment KamLAND, we perform a simultaneous fit of the
oscillation parameters and TMs. Furthermore, we include data from the reactor
experiments Rovno, TEXONO and MUNU in our analysis, improving significantly the
current constraints on TMs. A comparison with previous works shows that our
bounds are the strongest and most general results presented up to now. Finally,
we perform a simulation of the future Borexino experiment and show that it will
improve the bounds from today's data by order of magnitude.


title: The Electroweak Standard Model in the Axial Gauge

abstract:
  We derive the Feynman rules of the standard model in the axial gauge. After
this we prove that the fields $\phi_W$ and $\phi_Z$ do not correspond to
physical particles. As a consequence, these fields cannot appear as incoming or
outgoing lines in Feynman graphs. We then calculate the contribution of these
fields in the case of a particular decay mode of the top quark.


title: Instanton-Driven Saturation at Small x

abstract:
  We report on the interesting possibility of instanton-driven gluon saturation
in lepton-nucleon scattering at small Bjorken-x. Our results crucially involve
non-perturbative information from high-quality lattice simulations. The
conspicuous, intrinsic instanton size scale < rho > ~ 0.5 fm, as known from the
lattice, turns out to determine the saturation scale. A central result is the
identification of the ``colour glass condensate'' with the QCD-sphaleron state.


title: Lepton Flavor Violation, Neutralino Dark Matter and the Reach of the LHC

abstract:
  We revisit the phenomenology of the Constrained MSSM with right-handed
neutrinos (CMSSMRN). A supersymmetric seesaw mechanism, generating neutrino
masses and sizable lepton flavour violating (LFV) entries is assumed to be
operative. In this scheme, we study the complementarity between the `observable
ranges' of various paths leading to the possible discovery of low energy SUSY:
the reach of the Cern Large Hadron Collider (LHC), the quest for neutralino
dark matter signals and indirect searches through LFV processes. Within the
regions of the CMSSMRN parameter space compatible with all
cosmo-phenomenological requirements, those which are expected to be probed at
the LHC will be typically also accessible to upcoming LFV experiments.
Moreover, parameter space portions featuring a heavy SUSY particle spectrum
could be well beyond LHC reach while leaving LFV searches as the only key to
get a glimpse on SUSY.


title: Warm inflation solution to the eta-problem

abstract:
  Warm inflationary dynamics is shown to satisfy both the slow-roll and density
perturbation constraints for $m_{\phi} \gg H$ or equivalently $\eta \gg 1$ and
for inflaton field amplitudes much below the Planck scale, $<\phi > < m_{pl}$.
I start by reviewing the two types of inflation dynamics, isentropic or cold
inflation and nonisentropic or warm inflation. In the former, inflation occurs
without radiation production, whereas in the latter both radiation production
and inflation occur concurrently. I then discuss recent, detailed, quantum
field theory calculations showing that many generic inflation models, including
hybrid inflation, which were believed only to have cold inflation regimes, in
fact have regimes of both warm and cold inflation. These results dispel many
foregone assumptions generally made up to now about inflation models and bring
to the fore various elementary issues that must be addressed to do reliable
calculations from inflation models. I also discuss density perturbations and
observational consequences of warm inflation, especially related to WMAP.
Finally I show that warm inflation has intrinsic features that make the ``eta
problem'' nonexistent, and field amplitudes are below the Planck scale.


title: Visible Sector Supersymmetry Breaking Revisited

abstract:
  We revisit the possibility of "visible sector" SUSY models: models which are
straightforward renormalizable extensions of the Minimal Supersymmetric
Standard Model (MSSM), where SUSY is broken at tree level. Models of this type
were abandoned twenty years ago due to phenomenological problems, which we
review. We then demonstrate that it is possible to construct simple
phenomenologically viable visible sector SUSY models. Such models are indeed
very constrained, and have some inelegant features. They also have interesting
and distinctive phenomenology. Our models predict light gauginos and very heavy
squarks and sleptons. The squarks and sleptons may not be observable at the
LHC. The LSP is a stable very light gravitino with a significant Higgsino
admixture. The NLSP is mostly Bino. The Higgs boson is naturally heavy. Proton
decay is sufficently and naturally suppressed, even for a cutoff scale as low
as 10^8 GeV. The lightest particle of the O'Raifeartaigh sector (the LOP) is
stable, and is an interesting cold dark matter candidate.


title:
Covariant Light-Front Approach for B to K* gamma, K_1 gamma, K*_2 gamma
  Decays

abstract:
  Exclusive radiative B decays, B to K* gamma, K_1(1270) gamma, K_1(1400) gamma
and K*_2(1430) gamma, are studied in the framework of a covariant light-front
quark model. The tensor form factor T_1(q^2) at q^2=0, which is relevant to the
decay B to K* gamma, is found to be 0.24, substantially smaller than what
expected from the conventional light-front model or light-cone sum rules.
Taking into account the sizable next-to-leading order (NLO) corrections, the
calculated branching ratio of B to K* gamma agrees with experiment, while most
of the existing models predict too large B to K* gamma compared to the data.
The relative strength of B to K_1(1270) gamma and B to K_1(1400) gamma rates is
very sensitive to the sign of the K_1(1270)-K_1(1400) mixing angle. Contrary to
the other models in which K_1(1270) gamma and K_1(1400) gamma rates are
predicted to be comparable, it is found that one of them is strongly suppressed
owing to a large cancellation between two different form factor terms. The
calculated branching ratio of B to K*_2 gamma is in a good agreement with
experiment and this may imply the smallness of NLO corrections to this
radiative decay mode.


title: D_s(2317) and D_s(2457) from HQET Sum Rules

abstract:
  Within the framework of the heavy quark effective theory, QCD sum rules are
used to calculate the masses of p-wave (c-bar s) states. The results for 0^+
and 1^+ states with the angular momentum of the light component j_l=1/2 are
consistent with the experimental values for D_s(2317) and D_s(2457),
respectively.


title: Neutrino Oscillations in Gravitational Fields

abstract:
  We study the quantum mechanical phases associated with the propagation of
neutrinos in gravitational fields under the WKB approximation for Dirac
equation. Applying the result, the investigations are made for gravitational
effects on the neutrino oscillations, the lensing of neutrinos and so on.


title: Neutrino magnetic moments and photo-disintegration of deuterium

abstract:
  Neutrinos with non-zero magnetic moments can dissociate deuterium nuclei by a
photon exchange, in addition to the weak neutral current process. We calculate
the neutrino-magnetic moment induced photo-dissociation cross section of
deuterium using the equivalent photon method. This process would contribute
extra events to the neutral current reaction which is observed with high
precision in the salt-phase of SNO experiment. Using the SNO data and the
recent laboratory measurements of the $^7 Be (p, \gamma) ^8 B$ reaction which
give a more precise value of the solar $^8 B$ flux we find that the neutrino
effective magnetic moment is $\mu_{eff}^2 = (-2.76 \pm 1.46) \times 10^{-16}
\mu_B^2$ which can be interpreted as an upper bound $|\mu_{eff}| < 3.71 \times
10^{-9} \mu_B$ (at $95% CL$) on the neutrino magnetic moments.


title: Resummation and Shower Studies

abstract:
  The transverse momentum spectra of the Z and Higgs bosons are studied, as
probes of the consequences of multiple parton emissions in hadronic events.
Emphasis is put on constraints, present in showers, that go beyond conventional
leading log. It is shown that, if such constraints are relaxed, better
agreement can be obtained with experimental data and with resummation
descriptions.


title:
Review of the Properties of the W Boson at LEP, and the Precision
  Determination of its Mass

abstract:
  We review the precision measurement of the mass and couplings of the W Boson
at LEP. The total and differential W+W- cross section is used to extract the
WWZ and WWgamma couplings. We discuss the techniques used by the four LEP
experiments to determine the W mass in different decay channels, and present
the details of methods used to evaluate the sources of systematic uncertainty.


title:
Next-to-next-to-leading order soft and virtual corrections for QCD,
  Higgs and SUSY processes

abstract:
  I review recent advances in the calculation of higher-order soft-gluon
corrections for a variety of QCD, Higgs, and SUSY processes in hadron
colliders. A unified approach and master formulas for next-to-next-to-leading
order soft and virtual corrections are discussed. I present some applications
of the formalism to top quark pair production at the Tevatron and the LHC, top
production via anomalous couplings in flavor-changing neutral-current
processes, W boson hadroproduction at large transverse momentum, and charged
Higgs production at the LHC.


title: Prospects for Higgs Searches via VBF at the LHC with the ATLAS Detector

abstract:
  We report on the potential for the discovery of a Standard Model Higgs boson
with the vector boson fusion mechanism in the mass range $115<M_H<500 \gev$
with the ATLAS experiment at the LHC. Feasibility studies at hadron level
followed by a fast detector simulation have been performed for $H\to
W^{(*)}W^{(*)}\to l^+l^-\sla{p_T}$, $H\to\gamma\gamma$ and $H\to ZZ\to
l^+l^-q\bar{q}$. The results obtained show a large discovery potential in the
range $115<M_H<300 \gev$. Results obtained with multivariate techniques are
reported for a number of channels.


title:
Effective Lagrangians for QCD: Deconfinement and Chiral Symmetry
  Restoration

abstract:
  Effective Lagrangians for Quantum Chromodynamics (QCD) especially suited for
understanding deconfinement and chiral symmetry restoration at nonzero
temperature and matter density are reviewed. These effective theories allow one
to study generic properties of phase transitions using non-order parameter
fields without loosing the information encoded in the true order parameter.
{}For the pure gauge theory we demonstrate that, near the deconfining phase
transition, the center group symmetry is naturally linked to the conformal
anomaly. Another relevant outcome is that when the theory contains also quarks
we can explain the intertwining of chiral symmetry restoration and
deconfinement for QCD with matter fields either in the fundamental or in the
adjoint representation of the gauge group. As a test of our general approach we
show our results to be applicable also at non zero baryon chemical potential.
We also predict new testable substructures to be present in the phase diagram
of quarks in the adjoint representation of the gauge group. Here we provide
some new insights on the large $N$ limit of gauge theories by investigating the
hadronic world. We propose that the world of infinite $N$ should already be
well described when N=6 for QCD with two and three light flavors. Finally, we
suggest possible future applications of our results for heavy ions collisions.


title:
A possibility to determine the P-parity of the $\Theta^+$ pentaquark in
  the ${p}{n}\to \Lambda^0\Theta^+$ reaction

abstract:
  Spin structure of the reaction ${\vec p}{\vec n}\to {\vec \Lambda^0} {\vec
\Theta}$ is analysed at the threshold in a model independent way under
assumption that the $\Theta^+$ is an isosinglet. We found that the sign of the
spin-spin correlation parameter $C_{x,x}$ being measured in a double-spin
experiment, determines the P-parity of the $\Theta^+$ unambiguously.
Furthermore we show that the polarization coefficients $K_x^x,K_y^y$ and
$K_z^z$ which describe the polarization transfer from polarized beam or target
to the final $\Lambda^0$ and $\Theta^+$ are nonzero for a positive parity of
the $\Theta^+$ and equal zero for a negative parity. It allows one to determine
the P-parity of the $\Theta^+$ in a single-spin measurement, since the
polarization of the $\Lambda^0$ can be measured via its decay $\Lambda^0\to
\pi^-+ p$.


title: The role of ionization electrons in direct dark matter detection

abstract:
  In this paper we estimate the event rates of neutralino-nucleus scattering
leading to electron emission by the atomic ionization.
  We find that the branching ratio for detecting electrons vis a vis the
traditional neutralino nucleus elastic scattering sensitively depends on the
threshold energy. In the case of a light target and a neutralino mass of 100
GeV we estimate it to be around 10 percent assuming a reasonable threshold
energy of 250 eV.


title:
Generalized Ward identity and gauge invariance of the
  color-superconducting gap

abstract:
  We derive a generalized Ward identity for color-superconducting quark matter
via the functional integral approach. The identity implies the gauge
independence of the color-superconducting gap parameter on the quasi-particle
mass shell to subleading order in covariant gauge.


title: High-Energy Neutrino Astronomy: Opportunities For Particle Physics

abstract:
  In this article, based on the talk given at the Cracow Epiphany Conference on
Astroparticle Physics, I discuss some of the opportunities provided by
high-energy and ultra-high energy neutrino astronomy in probing particle
physics beyond the standard model. Following a short summary of current and
next generation experiments, I review the prospects for observations of
high-energy neutrino interactions, searches for particle dark matter, and
measurements of absolute neutrino masses, lifetimes and pseudo-Dirac mass
splittings.


title:
Phenomenological analysis of lepton and quark Yukawa couplings in SO(10)
  two Higgs model

abstract:
  We investigate a model that the Yukawa coupling form is constructed by two
kinds of matrix (M_0 and M_1). For example, in the SO(10) GUT model, M_0 and
M_1 are Yukawa couplings generated by the 10 and 126 Higgs scalars. We study
how this model can give the observed mass and mixings of quarks and leptons.
Parameter fitting is fully scanned by assuming all the input data to be
normally distributed around the center value.


title: Desperately Seeking Supersymmetry [SUSY]

abstract:
  In this article we try to clarify why supersymmetry [SUSY] and supersymmetric
grand unified theories [SUSY GUTs] are the new standard model of particle
physics, i.e. the standard by which all other theories and experiments are
measured.


title:
Exclusive photoproduction of charmed $D^*$ vector mesons, $\gamma+N\to
  Y_c+ \bar{D}^*$, $Y_c=\Lambda_c^+$ or $\Sigma_c$

abstract:
  The spin structure of the matrix element for the reactions $\gamma+ N\to Y_c
+{D}^*$, where $Y_c=\Lambda_c^+(2285)$, $\Sigma_c(2455)$ are charmed baryons
with spin 1/2, and $D^*(2010)$ is the vector charmed meson, can be
parametrized, in collinear regime, in terms of three independent scalar
amplitudes, which are functions of the photon energy $E_{\gamma}$, only. In
framework of an effective Lagrangian approach generalized to charm
photoproduction, we calculate the energy dependence of the differential cross
section, the density matrix element of $\bar{D}^*$, $\rho_{11}$, the asymmetry
$A_z$ in the collision of circularly polarized photons with polarized nucleons,
and the polarization of the produced $Y_c$-hyperon, $P_z$, in the collision of
circularly polarized photons with unpolarized target. All these polarization
observables either vanish or are large, in absolute value, with a smooth
$E_{\gamma}$-dependence, and differ for $\Lambda_c^+$ and $\Sigma_c$
--production.


title: Probing Transversity in Electroproduction of Two Vector Mesons

abstract:
  Electroproduction of two vector mesons with a large rapidity gap between them
provides the first feasible selective access to chiral-odd GPDs.
  The scattering amplitude of the process $ \gamma ^* N \to \rho_L^0 \rho_T^+
N'$ may be represented as a convolution of an impact factor describing the
$\gamma ^* \to \rho_L^0$ transition and an amplitude describing the $N\to
\rho_T^+ N'$ transition, analogously to deeply exclusive electroproduction of a
meson, the virtual photon being replaced by a Pomeron. The production of a
transversely polarized vector meson $\rho_T^+$ selects a chiral-odd GPD in the
proton.


title:
Renormalon approach to higher-twist distribution amplitudes and the
  convergence of the conformal expansion

abstract:
  Power corrections to exclusive processes are usually calculated using models
for twist-four distribution amplitudes (DA) which are based on the
leading-order terms in the conformal expansion. In this work we develop a
different approach which does not rely on conformal symmetry but is based
instead on renormalon analysis. This way we obtain an upper bound for the
contributions of higher conformal spin operators, which translates into a bound
on the end--point behavior of DA. The existence of such a bound is important
for proving factorization theorems. For the two-particle twist-four DA we find
in the renormalon model that the conformal expansion converges but it does not
converge uniformly near the end points. This means that power corrections to
observables which are particularly sensitive to the region where one valence
quark is soft, may be underestimated when using the first few terms in the
conformal expansion. The renormalon models of twist-four DA of the pion and the
rho meson are constructed and can be used as a viable alternative to existing
models.


title: Generalized Parton Distributions for large $x$

abstract:
  The $t$-dependence of generalized parton distrbutions for $x\to 1$ is
discussed. We argue that constituent quark models, where the $t$-dependence for
$x\to 1$ is through the product $(1-x)t$, are inconsistent. Instead we suggest
a leading dependence in terms of $(1-x)^n t$, where $n\geq 2$, for $x\to 1$.


title: Oblique Corrections from Higgsless Models in Warped Space

abstract:
  We calculate the tree-level oblique corrections to electroweak precision
observables generated in higgless models of electroweak symmetry breaking with
a 5D SU(2)_L x SU(2)_R x U(1)_{B-L} gauge group on a warped background. In the
absence of brane induced kinetic terms (and equal left and right gauge
couplings) we find the S parameter to be ~1.15, while T,U~0, as in technicolor
theories. Planck brane induced kinetic terms and unequal left-right couplings
can lower S, however for sufficiently low values of S tree-level unitarity will
be lost. A kinetic term localized on the TeV brane for SU(2)_D will generically
increase S, however an induced kinetic term for U(1)_{B-L} on the TeV brane
will lower S. With an appropriate choice of the value of this induced kinetic
term S~0 can be achieved. In this case the mass of the lowest Z' mode will be
lowered to about ~300 GeV.


title:
Squeezed and entangled collinear gluon states at the non-perturbative
  stage of QCD jet evolution

abstract:
  At the non-perturbative stage of jet evolution, fluctuations of collinear
gluons are less than those for coherent states that is indication of gluon
squeezed states. We show that gluon entangled states which are closely related
with two-mode squeezed states of gluon fields can appear by analogy with
corresponding photon states in quantum optics.


title:
Possible methods for the determination of the $P$-parity of the
  $\Theta^+$-pentaquark in NN-collisions

abstract:
  We present two possibilities to determine the P-parity of the pentaquark
$\Theta^+$, in a model independent way, via the measurement of polarization
observables in $p+p\to \Theta^+ +\Sigma^+$, or $n+p\to \Theta^+ +\Lambda^0$, in
the near threshold region. Besides the measurement of the spin correlation
coefficient, $A_{xx}=A_{yy}$, (in collisions of transversally polarized
nucleons), the coefficient $D_{xx}$ of polarization transfer from the initial
proton to the final $ \Sigma^+(\Lambda^0)$ hyperon is also unambiguously
related to the $\Theta^+$ parity.


title: Nonlinearly Realized Local Scale Invariance: Gravity and Matter

abstract:
  That the scalar field theories with no dimensional couplings possess local
scale invariance (LSI) via the curvature gauging is utilized to show that the
Goldstone boson, released by the spontaneous LSI breakdown, is swallowed by the
spacetime curvature in order to generate Newton's constant in the same spirit
as the induction of vector boson masses via spontaneous gauge symmetry
breaking. For Einstein gravity to be reproduced correctly, the Goldstone boson
of spontaneous LSI breaking must be endowed with ghost dynamics. The matter
sector, taken to be the standard model spectrum, gains full LSI with the
physical Higgs boson acting as the Goldstone boson released by LSI breakdown at
the weak scale. The pattern of particle masses is identical to that of the
standard model. There are unitary LSI gauges in which either the Goldstone
ghost from gravity sector or the Higgs boson from matter sector is eliminated
from the spectrum. The heavy right-handed neutrinos as well as softly broken
supersymmetry naturally fit into the nonlinearly realized LSI framework.


title: QCD Propagators at non-vanishing temperatures

abstract:
  We investigate the behaviour of the gluon and ghost propagators, especially
their infrared properties, at non-vanishing temperatures. To this end we solve
their Dyson-Schwinger equations on a torus and find an infrared enhanced ghost
propagator and an infrared vanishing gluon propagator.


title: Instantons and the Spin of the Nucleon

abstract:
  Motivated by measurements of the flavor singlet axial coupling constant of
the nucleon in polarized deep inelastic scattering we study the contribution of
instantons to OZI violation in the axial-vector channel. We consider, in
particular, the f_1-a_1 meson splitting, the flavor singlet and triplet axial
coupling of a constituent quark, and the axial coupling constant of the
nucleon. We show that instantons provide a short distance contribution to OZI
violating correlation functions which is repulsive in the f_1 meson channel and
adds to the flavor singlet three-point function of a constituent quark. We also
show that the sign of this contribution is determined by positivity arguments.
We compute long distance contributions using numerical simulations of the
instanton liquid. We find that the iso-vector axial coupling constant of a
constituent quark is (g_A^3)_Q=0.9 and that of a nucleon is g_A^3=1.28, in good
agreement with experiment. The flavor singlet coupling of a quark is close to
one, while that of a nucleon is suppressed, g_A^0=0.77. However, this number is
larger than the experimental value g_A^0=(0.28-0.41).


title:
Equation of spin motion in storage rings in a cylindrical coordinate
  system

abstract:
  The exact equation of spin motion in a cylindrical coordinate system with
allowance for electric dipole moments of particles has been derived. This
equation is convenient for analytical calculations of spin dynamics in circular
storage rings when the configuration of main fields is simple enough. The
generalized formula for the influence of a vertical betatron oscillation on the
angular velocity of spin rotation has been found. This formula agrees with the
previously obtained result and contains an additional oscillatory term that can
be used for fitting. The relative importance of terms in the equation of spin
motion is discussed.


title: Gluonic Meson Production

abstract:
  The existence of glueballs is predicted in QCD, the lightest one with quantum
numbers J^{PC}=0^{++}, but different calculations do not well agree on its mass
in the range below 1800 MeV. Several theoretical schemes have been proposed to
cope with the experimental data which often have considerable uncertainties.
Further experimental studies of the scalar meson sector are therefore important
and we discuss recent proposals to study leading clusters in gluon jets and
charmless B-decays to serve this purpose.


title:
Dynamical Theory of Disoriented Chiral Condensates at QCD Phase
  Transition

abstract:
  We apply the canonical quantum field theory based on the Liouville-von
Neumann equation to the nonequilibrium linear sigma model. Particular emphasis
is put on the mechanism for domain growth of disoriented chiral condensates due
to long wavelength modes and its scaling behavior. Scattering effects,
decoherence and emergence of order parameter are also discussed beyond the
Hartree approximation.


title: Quark Mass Textures and sin 2 beta

abstract:
  Recent precise measurements of sin 2 beta from the B-factories (BABAR and
BELLE) and a better known strange quark mass from lattice QCD make precision
tests of predictive texture models possible. The models tested include those
hierarchical N-zero textures classified by Ramond, Roberts and Ross, as well as
any other hierarchical matrix Ansatz with non-zero 12 = 21 and vanishing 11 and
13 elements. We calculate the maximally allowed value for sin 2 beta in these
models and show that all the aforementioned models with vanishing 11 and 13
elements are ruled out at the 3 sigma level. While at present sin 2 beta and
|Vub/Vcb| are equally good for testing N-zero texture models, in the near
future the former will surpass the latter in constraining power.


title:
Differentiating solutions to the gauge hierarchy problem through rare
  muon decays

abstract:
  We demonstrate the potential of forthcoming mu -> e gamma and mu-e conversion
experiments to implicate or disfavor solutions to the gauge hierarchy problem
before the advent of the CERN Large Hadron Collider. Solutions of dynamical
electroweak symmetry breaking, little Higgs, supersymmetry, and extra
dimensions are considered. Correlations of mu -> e gamma and mu-e conversion
branching ratios are analyzed for discriminating patterns. Measurements of
these exotic muon decays may have compelling implications for supersymmetric
solutions.


title:
Combined Effect of QCD Resummation and QED Radiative Correction to W
  boson Observables at the LHC

abstract:
  A precise determination of the $W$ boson mass at the CERN LHC requires a
theoretical calculation in which the effect of the initial-state multiple
soft-gluon emission and the final-state photonic correction are simultaneously
included. Here, we present such a calculation and discuss its prediction on a
few most relevant distributions of the decay leptons.


title: n-Particle irreducible effective action techniques for gauge theories

abstract:
  A loop or coupling expansion of a so-called n-particle irreducible (nPI)
generating functional provides a well-defined approximation scheme in terms of
self-consistently dressed propagators and n-point vertices. A self-consistently
complete description determines the functional for arbitrarily high n to a
given order in the expansion. We point out an equivalence hierarchy for nPI
effective actions, which allows one to obtain a self-consistently complete
result in practice. The method is applied to a SU(N) gauge theory with fermions
up to four-loop or O(g^6) corrections. For non-equilibrium we discuss the
connection to kinetic theory. The leading-order on-shell results in g can be
obtained from the three-loop effective action approximation, which already
includes in particular all diagrams enhanced by the Landau Pomeranchuk Migdal
effect. Furthermore, we compare the effective action approach with
Schwinger-Dyson (SD) equations. By construction, SD equations are expressed in
terms of loop diagrams including both classical and dressed vertices, which
leads to ambiguities of whether classical or dressed ones should be employed at
a given truncation order. We point out that these problems are absent using
effective action techniques. We show that a wide class of truncations of SD
equations cannot be obtained from the nPI effective action. In turn, our
results can be used to resolve SD ambiguities of whether classical or dressed
vertices should be employed at a given truncation order.


title: K_{e3} decays and CKM unitarity

abstract:
  We present a detailed numerical study of the K_{e3} decays to
O(p^6,(m_d-m_u)p^2,e^2p^2) in chiral perturbation theory with virtual photons
and leptons. We describe the extraction of the CKM matrix element |V_{us}| from
the experimental K_{e3} decay parameters. We propose a consistency check of the
K^+_{e3} and K^0_{e3} data that is largely insensitive to the dominating
theoretical uncertainties, in particular the contributions of order p^6. Our
analysis is highly relevant in view of the recent high statistics measurement
of the K^+_{e3} branching ratio by E865 at Brookhaven which does not indicate
any significant deviation from CKM unitarity but rather a discrepancy with the
present K^0_{e3} data.


title: QCD vacuum topological susceptibility in a non-local chiral quark model

abstract:
  The topological susceptibility of QCD vacuum is studied in the framework of a
covariant chiral quark model with non-local quark-quark interaction. The
relation of the first moment of topological susceptibility \chi'(0) and the
'spin crisis' problem is briefly discussed. It is shown, in particular, that
one always gets the inequality \chi'(0)>\chi'_{OZI}.


title: Charged pions and kaons weak leptonic decays at finite density

abstract:
  The weak leptonic decays $\pi^\pm\to\mu^\pm\nu_{\mu}(\bar{\nu}_{\mu}),
\pi^\pm\to e^\pm\nu_e(\bar{\nu}_{e}),
K^\pm\to\mu^\pm\nu_{\mu}(\bar{\nu}_{\mu})$ and $K^\pm\to e^\pm
\nu_e(\bar{\nu}_{e})$ are investigated within the framework of the SU(3)
Nambu-Jona-Lasinio model, in the vacuum and in quark matter in $\beta$
equilibrium. It is found that, at low densities, the decay rates of the charge
multiplets, that are decoupled in this kind of flavor asymmetric matter, are
affected differently. As the density increases, these decay rates become closer
and show a tendency to vanish. This shows that weak interactions are strongly
influenced by the medium as a consequence of restoration of chiral symmetry.


title: On the direct CP violation parameter epsilon prime

abstract:
  We review different definitions of the $\epsilon'$ parameter describing
direct CP violation in neutral kaon decays, which was precisely measured in
recent experiments, and point out the inconsistency of some of them due to a
CPT constraint. The proper comparison of the experimental results to the
theoretical computations is discussed.


title: Small-$Q^2$ extension of DGLAP-constrained Regge residues

abstract:
  In a previous paper, we have shown that it was possible to use the DGLAP
evolution equatio n to constrain the high-$Q^2$ ($Q^2 \ge 10$ GeV$^2$)
behaviour of the residues of a high-e nergy Regge model, and we applied the
developed method to the triple-pole pomeron model. W e show here that one can
obtain a description of the low-$Q^2$ $\gamma^{(*)} p$ data match ing the
high-$Q^2$ results at $Q^2 = 10$ GeV$^2$.


title: Some issues related to the direct detection of dark matter

abstract:
  We briefly review some theoretical issues involved in the direct detection of
supersymmetric (SUSY) dark matter. After a brief discussion of the allowed SYSY
parameter space we focus on the determination of the traditional neutralino
detection rates, in experiments which measure the energy of the recoiling
nucleus, such as the coherent and spin induced rates and the dependence of the
rate on the motion of the Earth (modulation effect). Then we examine the novel
features appearing in directional experiments, which detect the recoiling
nucleus in a given direction. Next we estimate the branching ratios for
transitions to accessible excited nuclear levels. Finally we estimate the event
rates leading to the atom ionization and subsequent detection of the outgoing
electrons.


title:
Constrains on non-Newtonian gravity from the experiment on neutron
  quantum states in the Earth's gravitational field

abstract:
  An upper limit to non-Newtonian attracive forces is obtained from the
measurement of quantum states of neutrons in the Earth's gravitational field.
This limit improves the existing constrains in the nanometer range.


title: How to measure the Pomeron phase in diffractive dipion photoproduction

abstract:
  The study of charge asymmetry of pions in the high-energy process gamma p ->
pi+ pi- p (e p -> e pi+ pi- p) at very small dipion momenta offers a method to
measure the phase of the forward hadronic (quasi)elastic amplitude gamma p ->
rho p. We estimate potential of such measurements at HERA.


title: Semileptonic (D_s^+ -> phi l nu) decay in QCD light cone sum rule

abstract:
  We calculate the form factors V, A_1, A_2 and A_0 appearing in the (D -> phi)
transition in light cone QCD sum rule method. We compare our results on these
form factors with the current experimental results and existing theoretical
calculations.


title: Electroweak pinch technique to all orders

abstract:
  The generalization of the pinch technique to all orders in the electroweak
sector of the Standard Model within the class of the renormalizable 't Hooft
gauges, is presented. In particular, both the all-order PT gauge-boson-- and
scalar--fermions vertices, as well as the diagonal and mixed gauge-boson and
scalar self-energies are explicitly constructed. This is achieved through the
generalization to the Standard Model of the procedure recently applied to the
QCD case, which consist of two steps: (i) the identification of special Green's
functions, which serve as a common kernel to all self-energy and vertex
diagrams, and (ii) the study of the (on-shell) Slavnov-Taylor identities they
satisfy. It is then shown that the ghost, scalar and scalar--gauge-boson
Green's functions appearing in these identities capture precisely the result of
the pinching action at arbitrary order. It turns out that the aforementioned
Green's functions play a crucial role, their net effect being the non-trivial
modification of the ghost, scalar and scalar--gauge-boson diagrams of the
gauge-boson-- or scalar--fermions vertex we have started from, in such a way as
to dynamically generate the characteristic ghost and scalar sector of the
background field method. The pinch technique gauge-boson and scalar
self-energies are also explicitly constructed by resorting to the method of the
background-quantum identities.


title: Dynamical symmetry breaking in Gauge-Higgs unification on orbifold

abstract:
  We study the dynamical symmetry breaking in the gauge-Higgs unification of
the 5D theory compactified on an orbifold, $S^1/Z_2$. This theory identifies
Wilson line degrees of freedoms as ``Higgs doublets''. We consider $SU(3)_c
\times SU(3)_W$ and SU(6) models with the compactification scale of order a few
TeV. The gauge symmetries are reduced to $SU(3)_c \times SU(2)_L \times U(1)_Y$
and $SU(3)_c \times SU(2)_L \times U(1)_Y \times U(1)$, respectively, through
the orbifolding boundary conditions. We estimate the one loop effective
potential of ``Higgs doublets'', and find that the electro-weak breaking is
realized through the radiative corrections when there are suitable numbers of
bulk fields possessing the suitable representations. The masses of ``Higgs
doublets'' are ${\mathcal O}(100)$ GeV in this scenario.


title:
Vacuum structure and dynamical symmetry breaking in gauge-Higgs
  unification models

abstract:
  This paper has been withdrawn by the authors, because the authors have second
thought that the new ideas in this paper are better to be contained in another
paper.


title:
A general formula of the effective potential in 5D SU(N) gauge theory on
  orbifold

abstract:
  We show a general formula of the one loop effective potential of the 5D SU(N)
gauge theory compactified on an orbifold, $S^1/Z_2$. The formula shows the case
when there are fundamental, (anti-)symmetric tensor and adjoint
representational bulk fields. Our calculation method is also applicable when
there are bulk fields belonging to higher dimensional representations. The
supersymmetric version of the effective potential with Scherk-Schwarz breaking
can be obtained straightforwardly. We also show some examples of effective
potentials in SU(3), SU(5) and SU(6) models with various boundary conditions,
which are reproduced by our general formula.


title:
Indirect signals from light neutralinos in supersymmetric models without
  gaugino mass unification

abstract:
  We examine indirect signals produced by neutralino self-annihilations, in the
galactic halo or inside celestial bodies, in the frame of an effective MSSM
model without gaugino-mass unification at a grand unification scale. We compare
our theoretical predictions with current experimental data of gamma-rays and
antiprotons in space and of upgoing muons at neutrino telescopes. Results are
presented for a wide range of the neutralino mass, though our discussions are
focused on light neutralinos. We find that only the antiproton signal is
potentially able to set constraints on very low-mass neutralinos, below 20 GeV.
The gamma-ray signal, both from the galactic center and from high galactic
latitudes, requires significantly steep profiles or substantial clumpiness in
order to reach detectable levels. The up-going muon signal is largely below
experimental sensitivities for the neutrino flux coming from the Sun; for the
flux from the Earth an improvement of about one order of magnitude in
experimental sensitivities (with a low energy threshold) can make accessible
neutralino masses close to O, Si and Mg nuclei masses, for which resonant
capture is operative.


title: The Width of the $\Theta^{+}$ Exotic Baryon in the Chiral Soliton Model

abstract:
  In 1997 Diakonov, Petrov, and Polyakov, calculated the width of the exotic
baryon that they called $\Theta^{+}$. The prediction,
$\Gamma(\Theta^{+})\lesssim$ 15 MeV, has received considerable attention,
especially in light of the narrowness of the experimentally reported
$\Theta^{+}$ resonance. However, there is an arithmetic error in their work:
when corrected, the width estimate quoted in that paper should have been
$\lesssim$~30 MeV.


title:
B -> M1 M2: Factorization, Charming Penguins, Strong Phases, and
  Polarization

abstract:
  Using the soft-collinear effective theory we derive the factorization theorem
for the decays B-> M1 M2 with M{1,2}= pi,K, rho,K*, at leading order in
Lambda/E_M and Lambda/mb. The results derived here apply even if alpha_s(E_M
Lambda) is not perturbative, and we prove that the physics sensitive to the
E*Lambda scale is the same in B-> M1 M2 and B-> M form factors. We argue that
c-cbar penguins could give long-distance effects at leading order. Decays to
two transversely polarized vector mesons are discussed. Analyzing B-> pi pi we
find predictions for B^0 -> pi^0 pi^0 and |V_{ub}| f_+(0) as a function of
gamma.


title:
Exact identification of the radion and its coupling to the observable
  sector

abstract:
  Braneworld models in extra dimensions can be tested in laboratory by the
coupling of the radion to the Standard Model fields. The identification of the
radion as a canonically normalized field involves a careful General Relativity
treatment: if a bulk scalar is responsible for the stabilization of the system,
its fluctuations are entangled with the perturbations of the metric and they
also have to be taken into account (similarly to the well-developed theory of
scalar metric perturbations in 4D cosmology with a scalar field). Extracting a
proper dynamical variable in a warped geometry/scalar setting is a nontrivial
task, performed so far only in the limit of negligible backreaction of the
scalar field on the background geometry. We perform the general calculation,
diagonalizing the action up to second order in the perturbations and
identifying the physical eigenmodes of the system for any amplitude of the bulk
scalar. This computation allows us to derive a very simple expression for the
exact coupling of the eigenmodes to the Standard Model fields on the brane,
valid for an arbitrary background configuration. As an application, we discuss
the Goldberger-Wise mechanism for the stabilization of the radion in the
Randall-Sundrum type models. The existing studies, limited to small amplitude
of the bulk scalar field, are characterized by a radion mass which is
significantly below the physical scale at the observable brane. We extend them
beyond the small backreaction regime. For intermediate amplitudes, the radion
mass approaches the electroweak scale, while its coupling to the observable
brane remains nearly constant. At very high amplitudes, the radion mass instead
decreases, while the coupling sharply increases. Severe experimental
constraints are expected in this regime.


title: Baryon Exotics in the Quark Model, the Skyrme Model and QCD

abstract:
  We identify the quantum numbers of baryon exotics in the Quark Model, the
Skyrme Model and QCD, and show that they agree for arbitrary colors and
flavors. We define exoticness, E, which can be used to classify the states. The
exotic baryons include the recently discovered qqqq qbar pentaquarks (E=1), as
well as exotic baryons with additional q qbar pairs (E >=1). The mass formula
for non-exotic and exotic baryons is given as an expansion in 1/N, and allows
one to relate the moment of inertia of the Skyrme soliton to the mass of a
constituent quark.


title: Heavy Pentaquarks

abstract:
  We construct the spin-flavor wave functions of the possible heavy pentaquarks
containing an anti-charm or anti-bottom quark using various clustered quark
models. Then we estimate the masses and magnetic moments of the $J^P={1\over
2}^+$ or ${3\over 2}^+$ heavy pentaquarks. We emphasize the difference in the
predictions of these models. Future experimental searches at BESIII, CLEOc,
BELLE, and LEP may find these interesting states.


title:
Pentaquark Symmetries, Selection Rules and another potentially Narrow
  State

abstract:
  We identify essential differences between the pentaquark and chiral soliton
models of \10bar$_5$ and {\bf 8}$_5$ pentaquarks and conventional {\bf 8}$_3$
states, which are experimentally measurable. We show how the decays of $\Xi_5$
states in particular can test models of the pentaquarks, recommend study of the
relative branching ratios of e.g. $\Xi^{-}_5 \to \Xi^-\pi^0:\Xi^0\pi^-$, and
predict that the decay amplitude $\Xi_5 \to \Xi^*\pi$ is zero at leading order
in pentaquark models for any mixture of \10bar and the associated {\bf 8}$_5$.
We also include a pedagogic discussion of wavefunctions in the pentaquark
picture and show that pentaquark models have this {\bf 8}$_5$ with $F/D=1/3$,
in leading order forbidding $\Xi_5 \to \Lambda K$. The role of Fermi-Dirac
symmetry in the $qqqq$ wavefunction and its implications for the width of
pentaquarks are briefly discussed. The relative couplings $g^2(\Theta_Q N
K_Q^*)/g^2(\Theta_Q N K_Q) = 3$ for $Q \equiv s,c,b$. A further potentially
narrow state $\Lambda$ in {\bf 8}$_5$ with $J^P = 3/2^+$ is predicted around
1650 MeV.


title:
Master integrals with 2 and 3 massive propagators for the 2-loop
  electroweak form factor - planar case

abstract:
  We compute the master integrals containing 2 and 3 massive propagators
entering the planar amplitudes of the 2-loop electroweak form factor. The
masses of the $W$, $Z$ and Higgs bosons are assumed to be degenerate. This work
is a continuation of our previous evaluation of master integrals containing at
most 1 massive propagator. The 1/\epsilon poles and the finite parts are
computed exactly in terms of a {\it new} class of 1-dimensional harmonic
polylogarithms of the variable x, with \epsilon=2-D/2 and D the pace-time
dimension. Since thresholds and pseudothresholds in s=\pm 4m^2 do appear in
addition to the old ones in s=0,\pm m^2, an extension of the basis function set
involving complex constants and radicals is introduced, together with a set of
recursion equations to reduce integrals with semi-integer powers. It is shown
that the basic properties of the harmonic polylogarithms are maintained by the
generalization. We derive small-momentum expansions |s| << m^2 of all the
6-denominator amplitudes. We also present large momentum expansions |s| >> m^2
of all the 6-denominator amplitudes which can be represented in terms of
ordinary harmonic polylogarithms. Comparison with previous results in the
literature is performed finding complete agreement.


title: Mass matrix Ansatz and lepton flavor violation in the THDM-III

abstract:
  Predictive Higgs-fermion couplings can be obtained when a specific texture
for the fermion mass matrices is included in the general two-Higgs doublet
model. We derive the form of these couplings in the charged lepton sector using
a Hermitian mass matrix Ansatz with four-texture zeros. The presence of
unconstrained phases in the vertices phi-li-lj modifies the pattern of
flavor-violating Higgs interactions. Bounds on the model parameters are
obtained from present limits on rare lepton flavor violating processes, which
could be extended further by the search for the decay tau -> mu mu mu and mu-e
conversion at future experiments. The signal from Higgs boson decays phi -> tau
mu could be searched at the large hadron collider (LHC), while e-mu transitions
could produce a detectable signal at a future e mu-collider, through the
reaction e mu -> h0 -> tau tau.


title: Search for Dark Matter in b -> s Transitions with Missing Energy

abstract:
  Dedicated underground experiments searching for dark matter have little
sensitivity to GeV and sub-GeV masses of dark matter particles. We show that
the decay of B mesons to K(K^*) and missing energy in the final state can be an
efficient probe of dark matter models in this mass range. We analyze the
minimal scalar dark matter model to show that the width of the decay mode with
two dark matter scalars B\to KSS may exceed the decay width in the Standard
Model channel, B\to K\nu\bar\nu, by up to two orders of magnitude. Existing
data from B physics experiments almost entirely exclude dark matter scalars
with masses less than 1 GeV. Expected data from B factories will probe the
range of dark matter masses up to 2 GeV.


title: Bounds on M_W, M_t, Sin^2 theta_eff^lept

abstract:
  Assuming that the Standard Model is correct and taking into account the lower
bound on M_H from direct searches, we discuss bounds on M_W, M_top, and Sin^2
theta_eff_lept at various confidence levels. This permits to identify
theoretically favored ranges for these important parameters in the Standard
Model framework, regardless of other observables. As an illustration of
possible future developments, a hypothetical benchmark scenario, involving
shifts less then 1 sigma in the experimental central values, is discussed.


title:
Low-lying $s=+1$ Pentaquark states in the Inherent Nodal Structure
  Analysis

abstract:
  The strangeness $s=+1$ pentaquark states as $qqqq\bar{q}$ clusters are
investigated in this letter. Starting from the inherent geometric symmetry, we
analyzed the inherent nodal structure of the system. As the nodeless states,
the low-lying states are picked out. Then the S-wave state $(J^P, T)=
({{1/2}}^{-}, 0)$ and P-wave state $(J^P, T)= ({{1/2}}^{+}, 0)$ may be the
candidates of low-lying pentaquark states. By comparing the accessibility of
the two states and referring the presently obtained K-N interaction potential,
we propose that the quantum numbers of the observed pentaquark state
$\Theta^{+}$ may be $(J^P, T)=({{1/2}}^{+}, 0)$ and L=1.


title: Kaon Fragmentation Function and $K/\pi$ Ratios in Nuclear Collisions

abstract:
  An improved leading order fragmentation functions set of kaon is proposed
based on the experimental data. We compare it with currently available sets,
and use it to calculate high-$p_T$ $K/\pi$ ratios in relativistic proton-proton
collisions. A prediction of $K/\pi$ ratios in relativistic nucleus-nucleus
collisions ($d + Au$ and $Au + Au$) at RHIC $\sqrt{s} = 200$ GeV is given.


title: Center-Edge Asymmetry at Hadron Colliders

abstract:
  We investigate the possibility of using the center-edge asymmetry to
distinguish graviton exchange from other new physics effects at hadron
colliders. Specifically, we study lepton-pair production within the ADD and RS
scenarios. At the Tevatron, the graviton-Z interference is the most important
contribution to the center-edge asymmetry, whereas at the LHC, the dominant
contribution comes from gluon fusion via graviton exchange, which has no
analogue at e^+ e^- colliders. We find that spin-2 and spin-1 exchange can be
distinguished up to an ADD cut-off scale, M_H, of about 5 TeV, at the 95% CL.
In the RS scenario, spin-2 resonances can be identified in most of the favored
parameter space.