title: Meson current in the CFL phase

abstract:
  We study the stability of the color-flavor locked (CFL) phase of dense quark
matter with regard to the formation of a non-zero Goldstone boson current. We
show that an instability appears in the vicinity of the point $\mu_s=\Delta$
which marks the appearance of gapless fermion modes in the CFL phase. Here,
$\mu_s=m_s^2/(2\mu)$ is the shift in chemical potential due to the strange
quark mass and $\Delta$ is the gap in the chiral limit. We show that in the
Goldstone boson current phase all components of the magnetic screening mass are
real. In this work we do not take into account homogeneous kaon condensation.
We study the effects of an instanton induced interaction of the magnitude
required to suppress kaon condensation.


title: Scalar Higgs boson production in a fusion of two off-shell gluons

abstract:
  The amplitude for scalar Higgs boson production in a fusion of two off-shell
gluons is calculated including finite (not infinite) masses of quarks in the
triangle loop. In comparison to the effective Lagrangian approach, we have
found a new term in the amplitude. The matrix element found can be used in the
kt-factorization approach to the Higgs boson production. The results are
compared with the calculations for on-shell gluons. Small deviations from the
cos(phi)^2-dependence are predicted. The off-shell effects found are
practically negligible.


title: Charged-fermion masses in SO(10): analysis with scalars in 10+120

abstract:
  We consider the scenario in which the mass matrices of the charged fermions
in the SO(10) Grand Unified Theory are generated exclusively by renormalizable
Yukawa couplings to one $\mathbf{10} \oplus \mathbf{120}$ representation of
scalars. We analyze, partly analytically and partly numerically, this scenario
in the three-generations case. We demonstrate that it leads to unification of
the $b$ and $\tau$ masses at the GUT scale. Testing this scenario against the
mass values at the GUT scale, obtained from the renormalization-group evolution
in the minimal SUSY extension of the Standard Model, we find that it is not
viable: either the down-quark mass or the top-quark mass must be
unrealistically low. If we include the CKM mixing angles in the test, then, in
order that the mixing angles are well reproduced, either the top-quark mass or
the strange-quark mass together with the down-quark mass must be very low. We
conclude that, assuming a SUSY SO(10) scenario, charged-fermion mass generation
based exclusively on one $\mathbf{10} \oplus \mathbf{120}$ representation of
scalars is in contradiction with experiment.


title:
Fluctuations and Correlations in hadron-hadron and nucleus-nucleus
  collisions and String Percolation

abstract: This paper has been withdrawn due to an error in figure 5.


title: Alternating ions in a $\beta$-beam to solve degeneracies

abstract:
  We study how the eightfold-degeneracy in the ($\theta_{13},\delta$) plane
observed in $\gamma \sim 100$ $\beta$-beams can be reduced by periodically
changing the ions in the storage ring. This ``ions cocktail'' allows to change
the neutrino energy, at fixed $\gamma$, by choosing ions with different decay
energies. We propose to combine the standard $^6$He and $^{18}$Ne beams with
$^8$Li and $^8$B ones. These latter two ions have peaked $\nu_e \to \nu_\mu$
oscillation probabilities for $\gamma = 100$ at a baseline $L \sim 700$ Km. At
this distance and this $\gamma$ the oscillation probability of $^6$He and
$^{18}$Ne neutrinos is at its second maximum. This setup is particularly suited
for large enough values of $\theta_{13}$ (within reach at T2K-I) and it allows
solving most of the eightfold-degeneracy, measuring $\theta_{13}, \delta$ and
the sign of the atmospheric mass difference for values of $\theta_{13} \geq
5^\circ$.


title: New physics upper bound on the branching ratio of B_s --> l+ l- gamma

abstract:
  We consider the effect of new physics on the branching ratio of B_s--> l+ l-
gamma where l=e,mu. If the new physics is of the form scalar/pseudoscalar, then
it makes no contribution to B_s--> l+ l- gamma, unlike in the case of B_s--> l+
l-, where it can potentially make a very large contribution. If the new physics
is in the form of vector/axial-vector operators, then present data on
B-->(K,K^*)l+ l-, does not allow a large enhancement for B_s--> l+ l- gamma. If
the new physics is in the form of tensor/pseudotensor operators, then the data
on B-->(K,K^*)l+ l- gives no useful constraint but the data on B-->K^* gamma
does. Here again, a large enhancement of B(B_s--> l+ l- gamma), much beyond the
Standard Model expectation, is not possible. Hence, we conclude that the
present data on b-->s transitions allow a large boost in B_s--> l+ l- but not
in B_s--> l+ l- gamma.


title: Dimension-two gluon condensate from large-Nc Regge models

abstract:
  It is shown that in the large-N_c limit radial Regge trajectories give rise
in a natural way to the presence of the dimension-2 gluon condensate, <A^2>, in
meson correlators. We match these models to QCD and provide estimates for <A^2>
in terms of other physical quantities. In particular, in the simplest strictly
linear radial Regge model with equal residues <A^2> is proportional to the pion
decay constant squared. However, the linear model fails a consistency condition
based on matching the short- and long-distance string tensions, nor reproduces
the phenomenological values of the gluon condensates. On the contrary, in Regge
models departing from strict linearity one may reproduce both the consistency
condition and the signs of condensates. We demonstrate this in a simple
explicit model.


title: Neutrino oscillation probabilities: Sensitivity to parameters

abstract:
  We study in detail the sensitivity of neutrino oscillation probabilities to
the fundamental neutrino parameters and their possible determination through
experiments. The first part of the paper is devoted to the broad theme of
isolating regions in the neutrino (and anti-neutrino) energy and propagation
length that are sensitive to the oscillation parameters. Such a study is
relevant to neutrinos both from the Earth's atmosphere or from a neutrino
factory. For completeness we discuss the sensitivity, however small, to the
parameters involved in a three-generation framework, and to the Earth matter
density profile. We then study processes relevant to atmospheric neutrinos
which are sensitive to and allow precision measurements of the mixing angle
theta_23 and mass-squared difference delta_32 apart from the mixing angle
theta_13. Crucial to this analysis is charge identification; detectors having
this capability can isolate these matter effects. In particular, we address the
issue of using matter effects to determine whether the mixing angle theta_23 is
maximal, and, if not, to explore how well its octant can be determined. When
realistic detector resolutions are included, we find that deviations of about
15% (20%) from a maximal value of sin^2 theta_23=1/2 can be measured at 95%
(99%) CL provided theta_13 is non-zero, sin^2 theta_13 >= 0.015, and the
neutrino mass ordering is normal, with fairly large exposures of 1000
kton-years.


title: Gravitino Overproduction in Inflaton Decay

abstract:
  Most of the inflation models end up with non-vanishing vacuum expectation
values of the inflaton fields \phi in the true vacuum, which induce, in
general, nonvanishing auxiliary field G_\phi for the inflaton potential in
supergravity. We show that the presence of nonzero G_\phi gives rise to
inflaton decay into a pair of the gravitinos and are thereby severely
constrained by cosmology especially if the gravitino is unstable and its mass
is in a range of O(100) GeV \sim O(10) TeV. For several inflation models, we
explicitly calculate the values of G_\phi and find that most of them are
excluded or on the verge of being excluded for the gravitino mass in that
range. We conclude that an inflation model with vanishing G_\phi, typically
realized in a chaotic inflation, is favored in a sense that it naturally avoids
the potential gravitino overproduction problem.


title: Dissipation coefficients for supersymmetric inflatonary models

abstract:
  Dissipative effects can lead to a friction term in the equation of motion for
an inflaton field during the inflationary era. The friction term may be linear
and localised, in which case it is described by a dissipation coefficient. The
dissipation coefficient is calculated here in a supersymmetric model with a two
stage decay process in which the inflaton decays into a thermal gas of light
particles through a heavy intermediate. At low temperatures, the dissipation
coefficient $\propto T^3$ in a thermal approximation. Results are also given
for a non-equilibrium anzatz. The dissipation coefficient is consistent with a
warm inflationary regime for moderate ($\sim 0.1$) values of the coupling
constants.


title:
Magnetic dipole moment of the $\Delta(1232)$ in chiral perturbation
  theory

abstract:
  The magnetic dipole moment of the $\Delta (1232)$ is calculated in the
framework of manifestly Lorentz-invariant baryon chiral perturbation theory in
combination with the extended on-mass-shell renormalization scheme. As in the
case of the nucleon, at leading order both isoscalar and isovector anomalous
magnetic moments are given in terms of two low-energy constants. In contrast to
the nucleon case, at next-to-leading order the isoscalar anomalous magnetic
moment receives a (real) loop contribution. Moreover, due to the unstable
nature of the $\Delta (1232)$, at next-to-leading order the isovector anomalous
magnetic moment not only receives a real but also an imaginary loop
contribution.


title:
Matter Effect on Neutrino Oscillations from the violation of
  Universality in Neutrino Neutral Current Interactions

abstract:
  The violation of lepton-flavor-universality in the neutrino-Z interactions
can lead to extra matter effects on neutrino oscillations at high energies,
beyond that due to the usual charged-current interaction of the
electron-neutrino. We show that the dominant effect of the violation is a shift
in the effective value of \theta_{23}. This is in contrast to the dominant
effect of the charged-current interaction which shifts \theta_{12} and
\theta_{13}. The shift in \theta_{23} will be difficult to observe if the value
of \sin^2(2\theta_{23}) is too close to one. However, if the value of
\sin^2(2\theta_{23}) is as small as 0.92, then a Fermilab -> Hyper-Kamiokande
experiment can potentially place a constraint on universality violation at the
1% level after 5 years of data taking.


title: Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering

abstract:
  We calculate, in a model, the beam spin asymmetry in semi-inclusive jet
production in deep inelastic scattering. This twist-3, $T$-odd observable is
non-zero due to final state strong interactions. With reasonable choices for
the parameters, one finds an asymmetry of several percent, about the size seen
experimentally. We present the result both as an explicit asymmetry calculation
and as a model calculation of the new transverse-momentum dependent
distribution function $g^\perp$.


title: Little Higgs models and single top production at the LHC

abstract:
  We investigate the corrections of the littlest Higgs(LH) model and the SU(3)
simple group model to single top production at the CERN Large Hardon
Collider(LHC). We find that the new gauge bosons $W_{H}^{\pm}$ predicted by the
LH model can generate significant contributions to single top production via
the s-channel process. The correction terms for the tree-level $Wqq'$ couplings
coming from the SU(3) simple group model can give large contributions to the
cross sections of the t-channel single top production process. We expect that
the effects of the LH model and the SU(3) simple group model on single top
production can be detected at the LHC experiments.


title: Analysis of exclusive (B_s -> D_{s_0} (2317) l nu_l) decay in "full" QCD

abstract:
  The transition form factors of the semileptonic decay B_s into scalar
D_{s_0}(2317) meson is calculated in the framework of 3-point QCD sum rule. The
branching ratio is found to be ~10^(-3) for the (B_s -> D_{s_0}(2317) l nu_l)
(l=e,mu) decay, and 10^(-4) for the (B_s -> D_{s_0}(2317) tau nu_tau) decay,
respectively.


title:
Single Transverse Spin Asymmetry for Large-p_T Pion Production in
  Semi-Inclusive Deep Inelastic Scattering

abstract:
  We study the single spin asymmetry (SSA) for the pion production with large
transverse momentum p_T in semi-inclusive deep inelastic scattering
$ep^\uparrow\to e\pi X$. We derive the twist-3 cross section formula for SSA,
focussing on the soft-gluon-pole contributions associated with the twist-3
distribution for the nucleon and with the twist-3 fragmentation function for
the pion. We present a simple estimate of the asymmetries due to each twist-3
effect from nucleon and pion, respectively, by fixing the overall strength of
the relevant nonperturbative quantities by the data on the SSA A_N in
$p^\uparrow p\to\pi X$ collision.


title: New nonperturbative approach to the Debye mass in hot QCD

abstract:
  The Debye mass m_D is computed nonperturbatively in the deconfined phase of
QCD, where chromomagnetic confinement is known to be present. The latter
defines m_D to be m_D=c_D\sqrt{\sigma_s}, where c_D \cong 2.06 and
\sigma_s=\sigma_s(T) is the spatial string tension. The resulting magnitude of
m_D(T) and temperature dependence are in good agreement with lattice
calculations. Background perturbation theory expansion for m_D(T) is discussed
in comparison to standard perturbative results and recent gauge-invariant
definitions.


title:
A precise determination of $\alpha$ using $B^0\to\rho^+\rho^-$ and
  $B^+\to K^{*0}\rho^+$

abstract:
  The effect of the penguin amplitude on extracting $\alpha$ from CP
asymmetries in $B^0\to \rho^+\rho^-$ decays is studied using information on the
SU(3)-related penguin amplitude in $B^+\to K^{*0}\rho^+$. Conservative bounds
on non-factorizable SU(3) breaking, small amplitudes, and the strong phase
difference between tree and penguin amplitudes, are shown to reduce the error
in $\alpha$ in comparison with the one obtained using isospin symmetry in
$B\to\rho\rho$. Current measurements imply $\alpha = [90 \pm 7 f{\rm
exp})^{+2}_{-5} ({\rm th})]^\circ$.


title: Experimental Status of $B$ Physics

abstract:
  A short summary is given of the current status of B physics. Reasons for
physics beyond the Standard Model are discussed. Constraints on New Physics are
given using measurements of B mixing, Bs mixing, and CP violation, along with
|Vub. Future goals, and upcoming new experiments are also mentioned.


title:
$B_{(s)},D_{(s)} \to \pi, K, \eta, \rho, K^*, \omega, \phi$ Transition
  Form Factors and Decay Rates with Extraction of the CKM parameters
  $|V_{ub}|$, $|V_{cs}|$, $|V_{cd}|$

abstract:
  A systematic calculation for the transition form factors of heavy to light
mesons ($B,B_s,D,D_s \to \pi, K, \eta, \rho, K^*, \omega, \phi$) is carried out
by using light-cone sum rules in the framework of heavy quark effective field
theory. The heavy quark symmetry at the leading order of $1/m_Q$ expansion
enables us to reduce the independent wave functions and establish interesting
relations among form factors. Some relations hold for the whole region of
momentum transfer. The meson distribution amplitudes up to twist-4 including
the contributions from higher conformal spin partial waves and light meson mass
corrections are considered. The CKM matrix elements $|V_{ub}|$, $|V_{cs}|$ and
$|V_{cd}|$ are extracted from some relatively well-measured decay channels. A
detailed prediction for the branching ratios of heavy to light meson decays is
then presented. The resulting predictions for the semileptonic and radiative
decay rates of heavy to light mesons ($B,B_s,D,D_s \to \pi, K, \eta, \rho, K^*,
\omega, \phi$) are found to be compatible with the current experimental data
and can be tested by more precise experiments at B-factory, LHCb, BEPCII and
CLEOc.


title: B->rho pi decays and final state phases

abstract:
  Using the isospin analysis, the fact that penguin is pure Delta I=1/2
transition, the unitarity for tree graph and C-invariance of strong
interactions, it is shown that delta_{t}=0=tilde{delta}_{t},
r_{-0}=tr_{0-},delta_{-0}-delta_{0-}=pm pi, 2tr_{f}r_{\bar{f}}\cos (\delta
_{f}-\delta_{bar{f}})=(r_{f}^{2}+t^{2}r_{bar{f}}^{2})-r_{-0}^{2}, where delta
's are final state phases and r's are penguin to tree ratios defined in the
text. Using the factorization for tree graph as input and the experimental
data, we have obtained the following bounds on r_{f},r_{bar{f}},delta_{f} and
delta_{bar{f}}:0.11leq r_{f}leq 0.21,0.18leq r_{bar{f}}leq 0.30; 11^{circ}leq
delta_{f}\leq 57^{circ},23^{circ}leq delta_{bar{f}}leq 90^{circ} for the case
z_{f,bar{f}}=cos alpha cos delta_{f,bar{f}}<0. For z_{f}<0 and z_{\bar{f}}>0,
we obtain the following bounds for r_{bar{f}} and delta_{bar{f}}:0.14leq
r_{bar{f}}leq 0.46; 90^{circ}leq delta_{bar{f}}leq 170^{circ}. From
experimental data, for the decays B^{-}->rho ^{-}pi ^{0}(rho ^{0}pi ^{-}) we
get epsilon_{-0}=0.28pm 0.10,epsilon_{0-}=0.51pm 0.10,
frac{A_{CP}^{-0}}{A_{CP}^{0-}}=-0.8\pm 0.1 i.e. A_{CP}^{-0} and A_{CP}^{0-}
have opposite sign, where 1+epsilon_{0-},_{0-}=frac{left|
T^{-0,0-}+C^{0-,-0}right|}{left| T^{-0,0-}|}. In the naive quark model the
above values imply a_{2}/a_{1}=0.39\pm 0.14 and a_{2}/a_{1}=0.37\pm 0.07
consistent with each other.


title:
Soft breaking of $L_\mu-L_\tau$ symmetry: Light neutrino spectrum and
  Leptogenesis

abstract:
  Continuous $U(1)_{L_\mu-L_\tau}$ symmetry can generate quasi degenerate mass
spectrum for both left handed light and right handed heavy Majorana neutrinos
assuming that the symmetry preserving non zero parameters are nearly same.
There is an accidental $\mu\tau$ exchange symmetry in the light and heavy
neutrino Majorana mass terms. This implies $\theta_{13}=0$ and
$\theta_{23}=\frac{\pi}{4}$. In addition it generates another zero mixing angle
and one zero mass difference. We restrict ourselves to type-I See-Saw mechanism
for generation of light neutrino mass. We have found that under
$U(1)_{L_\mu-L_\tau}$ symmetry cosmological lepton asymmetry vanishes. We break
$U(1)_{L_\mu-L_\tau}$ such a way that the $\mu\tau$ exchange symmetry preserves
in the neutrino sector. We have seen that light neutrino phenomenology can be
explained under soft breaking of this symmetry. We have observed that softness
of this symmetry breaking depends on the degeneracy of the light neutrino mass
spectrum. Quasi-degeneracy of right handed neutrino mass spectrum opens an
option for resonant leptogenesis. The degeneracy of the right handed neutrino
mass spectrum is restricted through light neutrino data. We observed that for
generation of right sized baryon asymmetry common neutrino mass scale $m_0$
have to be of the order of $\sqrt{\Delta m^2_{\rm atm}}$ and corresponding
right handed neutrino mass scale have to be nearly $10^{13}$ GeV. We also have
discussed the effect of RG evolution on light neutrino spectrum and also on
baryon asymmetry.


title: Four-quark spectroscopy within the hyperspherical formalism

abstract:
  We present a generalization of the hyperspherical harmonic formalism to study
systems made of quarks and antiquarks of the same flavor. This generalization
is based on the symmetrization of the $N-$body wave function with respect to
the symmetric group using the Barnea and Novoselsky algorithm. The formalism is
applied to study four-quark systems by means of a constituent quark model
successful in the description of the two- and three-quark systems. The results
are compared to those obtained by means of variational approaches. Our analysis
shows that four-quark systems with exotic $0^{+-}$ and non-exotic $2^{++}$
quantum numbers may be bound independently of the mass of the quark. $2^{+-}$
and $1^{+-}$ states become attractive only for larger mass of the quarks.


title: Precise predictions for the Higgs-boson decay H -> W W/Z Z -> 4 leptons

abstract:
  The decay of the Standard Model Higgs boson into four leptons via a virtual
W-boson or Z-boson pair is one of the most important decay modes in the
Higgs-boson search at the LHC. We present the complete electroweak radiative
corrections of O(\alpha) to these processes, including improvements beyond
O(\alpha) originating from heavy-Higgs effects and final-state radiation. The
intermediate W- and Z-boson resonances are described (without any expansion or
on-shell approximation) by consistently employing complex mass parameters for
the gauge bosons (complex-mass scheme). The corrections to partial decay widths
typically amount to some per cent and increase with growing Higgs mass M_H,
reaching about 8% at M_H \sim 500 GeV. For not too large Higgs masses (M_H
<\sim 400 GeV) the corrections to the partial decay widths can be reproduced
within <\sim 2% by simple approximations. For angular distributions the
corrections are somewhat larger and distort the shapes. For invariant-mass
distributions of fermion pairs they can reach several tens of per cent
depending on the treatment of photon radiation. The discussed corrections have
been implemented in a Monte Carlo event generator called PROPHECY4F.


title: Leptonic Charged Higgs Decays in the Zee Model

abstract:
  We consider the version of the Zee model where both Higgs doublets couple to
leptons. Within this framework we study charged Higgs decays. We focus on a
model with minimal number of parameters consistent with experimental neutrino
data. Using constraints from neutrino physics we (i) discuss the reconstruction
of the parameter space of the model using the leptonic decay patterns of both
of the two charged Higgses, $h_{1,2}^{+}\to \ell_{j}^{+}\nu_{i}$, and the decay
of the heavier charged Higgs, $h_{2}^{+}\to h^{+}_{1}h^{0}$; (ii) show that the
decay rate $\Gamma(h_{1}^{+}\to \mu^{+}\nu_{i})$ in general is enhanced in
comparision to the standard two Higgs doublet model while in some regions of
parameter space $\Gamma(h_{1}^{+}\to \mu^{+}\nu_{i})$ even dominates over
$\Gamma(h_{1}^{+}\to \tau^{+}\nu_{i})$.


title: Semiclassical mechanism for single-spin asymmetry in \pi^0-production

abstract:
  The chiral quark model combined with unitarity and impact parameter picture
provides simple semiclassical mechanism for generation of the single-spin
asymmetry $A_N$ in the $\pi^0$-production in the polarized proton collisions at
RHIC. We derive its linear $x_F$-dependence in polarized proton fragmentation
region along with the energy and transverse momentum independence at large
$p_T$ values.


title: Dark energy and formation of classical scalar fields

abstract:
  We present a quintessence model for the dark energy in which the quintessence
scalar field is produced by the decay of a super heavy dark matter and
gradually condensate to a classical scalar field. This model can explain both
the smallness and the latest observations by WMAP for the equation of state of
the dark energy which has $w \sim -1.06$. We review both classical and field
theoretical treatment of this model and briefly explain the most important
parameters for obtaining the observed characteristic of the dark energy.


title: QCD at the Dawn of the LHC Era

abstract:
  Precision computations of QCD and QCD+electroweak emission scattering
processes will play an important role in understanding experimental data from
the LHC, and thereby in uncovering new physics beyond the Standard Model.
Recent years have seen substantial progress in expanding our ability to perform
and implement such calculations. I discuss several different topics: the
resolution of seeming discrepancies between heavy-quark predictions and
measurements; the ongoing program of next-to-next-to-leading order
calculations; and also progress in merging the parton-shower and matrix-element
calculations. I will also outline some of the techniques emerging from
twistor-space string theory and its intellectual progeny.


title:
Active-sterile neutrino mixing in the absence of bare active neutrino
  mass

abstract:
  We investigate a minimal extension of the standard model in which the only
new ingredient is the sterile neutrinos. We do not introduce extra Higgs
multiplets or high dimensional effective operators to induce mass terms for the
active neutrinos, and the model is renormalizable in itself. We show for
arbitrary numbers of generations and sterile neutrinos that the independent
physical parameters in the leptonic sector are much less than previously
anticipated. For instance, with three active and two sterile neutrinos, there
are four mixing angles and three CP phases in addition to four non-vanishing
neutrino masses. We study phenomenological implications for tritium beta decay,
neutrinoless double beta decay and neutrino oscillations. For the most natural
see-saw parameters, we find that it is difficult to accommodate in the model
the best-fit values of masses and mixing parameters from oscillation data no
matter whether we include or not the null short-baseline experiments together
with the LSND result. This implies that if the LSND result is confirmed by
MiniBooNE, the see-saw parameter region of the model with two sterile neutrinos
could be largely excluded.


title: Semileptonic decays of heavy baryons in the relativistic quark model

abstract:
  Semileptonic decays of heavy baryons consisting of one heavy (Q=b,c) and two
light (q=u,d,s) quarks are considered in the heavy-quark--light-diquark
approximation. The relativistic quasipotential equation is used for obtaining
masses and wave functions of both diquarks and baryons within the constituent
quark model. The weak transition matrix elements are expressed through the
overlap integrals of the baryon wave functions. The Isgur-Wise functions are
determined in the whole accessible kinematic range. The exclusive semileptonic
decay rates and different asymmetries are calculated with applying the heavy
quark 1/m_Q expansion. The evaluated Lambda_b -> Lambda_c l nu decay rate
agrees with its experimental value.


title: Positive Parity Scalar Mesons in the 1-2 GeV Mass Range

abstract:
  Based on the observation that K_0(1430) is lighter than its SU_3 counterpart,
a_0(1450), we examine the possibility that these particles, together with
f_0(1370), f_0(1500) and f_0(1710), fill a tetraquark recurrence of the sub-GeV
0^{++} nonet mixed with a glueball state. We find the picture to be consistent
with the known data about the three f_0 resonances, more than the q-qbar
hypothesis. Conventional spin-orbit coupling suggests the q-qbar, P-wave, nonet
to lie around 1200 MeV. We review possible experimental indications of a scalar
isovector resonance at 1.29 GeV, first observed by OBELIX in p-pbar
annihilation.


title:
$O(\alpha_s^2)$ Timelike Wilson Coefficients for Parton-Fragmentation
  Functions in Mellin Space

abstract:
  We calculate the Mellin moments of the $O(\alpha_s^2)$ coefficient functions
for the unpolarized and polarized fragmentation functions. They can be
expressed in terms of multiple finite harmonic sums of maximal weight {\sf w =
4}. Using algebraic and structural relations between harmonic sums one finds
that besides the single harmonic sums only three basic sums and their
derivatives w.r.t. the summation index contribute. The Mellin moments are
analytically continued to complex values of the Mellin variable. This
representation significantly reduces the large complexity being present in
$x$--space calculations and allow very compact and fast numerical
implementations.


title: Production of four leptons in electroweak $\gamma\gamma$ interactions

abstract:
  Detailed numerical analysis of four charged leptons photoproduction in frame
of standard theory of electroweak interaction is presented. Total and
differential cross sections are obtained and investigated using the Monte-Carlo
method of numerical integration. Different energies of initial photons (60-2000
GeV in c.m.s.) as well as the definite and averaged spin states of interacting
particles are considered. A set of kinematical cuts of linear collider
experiments is discussed.


title: Spontaneous CP violation in the 3-3-1 model with right-handed neutrinos

abstract:
  We implement the mechanism of spontaneous CP violation in the 3-3-1 model
with right-handed neutrinos and recognize their sources of CP violation. Our
main result is that the mechanism works already in the minimal version of the
model and new sources of CP violation emerges as an effect of new physics at
energies higher than the electroweak scale.


title: Light-cone divergence in twist-3 correlation functions

abstract:
  It is argued that the definition of the twist-3 transverse momentum dependent
correlation functions must be modified if they contain light-like Wilson lines.
In the framework of a simple spectator model of the nucleon we show explicitly
the presence of a light-cone divergence for a specific twist-3 time-reversal
odd parton density. This divergence emerges for all eight twist-3 T-odd
correlators and appears also in the case of a quark target in perturbative QCD.
The divergence can be removed by using non-light-like Wilson lines. Based on
our results we argue that currently there exists no established factorization
formula for transverse momentum dependent twist-3 observables in semi-inclusive
DIS and related processes.


title:
Single Transverse-Spin Asymmetry in Drell-Yan Production at Large and
  Moderate Transverse Momentum

abstract:
  We study the single-transverse spin asymmetry for the Drell-Yan process. We
consider production of the lepton pair at large transverse momentum,
$q_\perp\sim Q$, where $Q$ is the pair's mass. The spin asymmetry is then of
higher twist and may be generated by twist-three quark-gluon correlation
functions. Expanding the result for $q_\perp\ll Q$, we make contact with the
transverse-momentum-dependent QCD factorization involving the so-called Sivers
functions. We find that the two mechanisms, quark-gluon correlations on one
hand and the Sivers effect on the other, contain the same physics in this
region. This ties the two together and imposes an important constraint on
phenomenological studies of single transverse spin asymmetries.


title: Physics at a New Fermilab Proton Driver

abstract:
  In 2004, motivated by the recent exciting developments in neutrino physics,
the Fermilab Long Range Planning Committee identified a new high intensity
Proton Driver as an attractive option for the future. At the end of 2004 the
APS ``Study on the Physics of Neutrinos'' concluded that the future U.S.
neutrino program should have, as one of its components, ``A proton driver in
the megawatt class or above and neutrino superbeam with an appropriate very
large detector capable of observing CP violation and measuring the neutrino
mass-squared differences and mixing parameters with high precision''. The
presently proposed Fermilab Proton Driver is designed to accomplish these
goals, and is based on, and would help develop, Linear Collider technology. In
this paper the Proton Driver parameters are summarized, and the potential
physics program is described.


title:
Annihilation Contributions in B -> K_1 gamma decay in next-to-leading
  order in LEET and CP-asymmetry

abstract:
  The effect of weak annihilation and u-quark penguin contribution on the
branching ratio B -> K_1 gamma at next-to-leading order of alpha_s are
calculated using LEET approach. It is shown that the value of LEET form factor
remains the same in the range of unitarity triangle phase alpha favored by the
Standard Model. CP-asymmetry for above mentioned decay has been calculated and
its suppression due to the hard spectator correction has also been
incorporated. In addition, the sensitivity of the CP-asymmetry on the
underlying parameters has been discussed.


title: Hadronic electric dipole moments in R-parity violating supersymmetry

abstract:
  We calculate the electric dipole moments (EDM) of the neutral Hg(199) atom,
neutron and deuteron within a generic R-parity violating SUSY model (RPV SUSY)
on the basis of a one-pion exchange model with CP-odd pion-nucleon
interactions. We consider two types of the RPV SUSY contributions to the above
hadronic EDMs: via the quark chromoelectric dipole moments (CEDM) and
CP-violating 4-quark interactions. We demonstrate that the former contributes
to all the three studied EDMs while the latter appears only in the nuclear EDMs
via the CP-odd nuclear forces. We find that the RPV SUSY induced 4-quark
interactions arise at tree level through the sneutrino exchange and involve
only s and b quarks. Therefore, their effect in hadronic EDMs is determined by
the strange and bottom-quark sea of the nucleon. From the null experimental
results on the hadronic EDMs we derive the limits on the imaginary parts of
certain products Im(lambda'* lambda') of the trilinear RPV-couplings and show
that the currently best limits come from the Hg(199) EDM experiments. We
demonstrate that some of these limits are better than those existing in the
literature. We argue that future storage ring experiments on the deuteron EDM
are able to improve these limits by several orders of magnitude.


title: A Universe Without Weak Interactions

abstract:
  A universe without weak interactions is constructed that undergoes big-bang
nucleosynthesis, matter domination, structure formation, and star formation.
The stars in this universe are able to burn for billions of years, synthesize
elements up to iron, and undergo supernova explosions, dispersing heavy
elements into the interstellar medium. These definitive claims are supported by
a detailed analysis where this hypothetical "Weakless Universe" is matched to
our Universe by simultaneously adjusting Standard Model and cosmological
parameters. For instance, chemistry and nuclear physics are essentially
unchanged. The apparent habitability of the Weakless Universe suggests that the
anthropic principle does not determine the scale of electroweak breaking, or
even require that it be smaller than the Planck scale, so long as technically
natural parameters may be suitably adjusted. Whether the multi-parameter
adjustment is realized or probable is dependent on the ultraviolet completion,
such as the string landscape. Considering a similar analysis for the
cosmological constant, however, we argue that no adjustments of other
parameters are able to allow the cosmological constant to raise up even
remotely close to the Planck scale while obtaining macroscopic structure. The
fine-tuning problems associated with the electroweak breaking scale and the
cosmological constant therefore appear to be qualitatively different from the
perspective of obtaining a habitable universe.


title:
Neutrino Masses in the Supersymmetric SU(3)_C X SU(3)_L X U(1)_X Model
  with right-handed neutrinos

abstract:
  The R-symmetry formalism is applied for the supersymmetric SU(3)_C X SU(3)_L
X U(1)_X (3-3-1) model with right-handed neutrinos. For this kind of models, we
study generalization of the MSSM relation among R-parity, spin and
matter-parity. Discrete symmetries for the proton stable in this model are
imposed, and we show that in such a case it is able to give leptons masses at
only the tree level contributions required. A simple mechanism for the mass
generation of the neutrinos is explored. We show that at the low-energy
effective theory, neutrino spectrum contains three Dirac fermions, one massless
and two degenerate in mass. At the energy-level where the mixing among them
with neutralinos turned on, neutrinos obtain Majorana masses and correct the
low-energy effective result which naturally gives rise to an inverted hierarchy
mass pattern. This mass spectrum can fit the current data with minor
fine-tuning. Consistent values for masses of the charged leptons are also
given. In this model, the MSSM neutralinos and charginos can be explicitly
identified in terms of the new constraints on masses which is not as in a
supersymmetric version of the minimal 3-3-1 model.


title:
Exclusive $B \to K^{(*)} \ell^+ \ell^-$, $B \to K^{(*)} \nu {\bar \nu}$
  and $B \to K^* \gamma$ transitions in a scenario with a single Universal
  Extra Dimension

abstract:
  We analyze the exclusive rare $B \to K^{(*)} \ell^+ \ell^-$, $B \to K^{(*)}
\nu \bar \nu$ and $B \to K^* \gamma$ decays in the Applequist-Cheng-Dobrescu
model, which is an extension of the Standard Model in presence of universal
extra dimensions. In particular, we consider the case of a single universal
extra dimension. We study how spectra, branching fractions and asymmetries
depend on the compactification parameter 1/R, and whether the hadronic
uncertainty due to the form factors obscures or not such a dependence. We find
that, using present data, it is possible in many cases to put a sensible lower
bound to 1/R, the most stringent one coming from $B \to K^* \gamma$. We also
study how improved experimental data can be used to establish stronger
constraints to this model.


title: Measuring the Photon Fragmentation Function at HERA

abstract:
  The production of final state photons in deep inelastic scattering originates
from photon radiation off leptons or quarks involved in the scattering process.
Photon radiation off quarks involves a contribution from the quark-to-photon
fragmentation function, corresponding to the non-perturbative transition of a
hadronic jet into a single, highly energetic photon accompanied by some limited
hadronic activity. Up to now, this fragmentation function was measured only in
electron-positron annihilation at LEP. We demonstrate by a dedicated
parton-level calculation that a competitive measurement of the quark-to-photon
fragmentation function can be obtained in deep inelastic scattering at HERA.
Such a measurement can be obtained by studying the photon energy spectra in
$\gamma + (0+1)$-jet events, where $\gamma$ denotes a hadronic jet containing a
highly energetic photon (the photon jet). Isolated photons are then defined
from the photon jet by imposing a minimal photon energy fraction. For this
so-called democratic clustering approach, we study the cross sections for
isolated $\gamma + (0+1)$-jet and $\gamma + (1+1)$-jet production as well as
for the inclusive isolated photon production in deep inelastic scattering.


title:
Two-Parton Contribution to the Heavy-Quark Forward-Backward Asymmetry in
  NNLO QCD

abstract:
  Forward-backward asymmetries, $A_{FB}^Q$, are important observables for the
determination of the neutral-current couplings of heavy quarks in inclusive
heavy quark production, $e^+ e^- \to \gamma^*, Z^* \to Q +X$. In view of the
measurement perspectives on $A_{FB}^Q$ at a future linear collider, precise
predictions of $A_{FB}^Q$ are required for massive quarks. We compute the
contribution of the $Q \bar Q$ final state to $A_{FB}^Q$ to order $\as^2$ in
the QCD coupling. We provide general formulae, and we show that this
contribution to $A_{FB}^Q$ is infrared-finite. We evaluate these two-parton
contributions for $b$ and $c$ quarks on and near the $Z$ resonance, and for $t$
quarks above threshold. Moreover, near the $t \bar t$ threshold we obtain, by
expanding in the heavy-quark velocity $\beta$, an expression for $A_{FB}^{t
\bar t}$ to order $\as^2$ and NNLL in $\beta$. This quantity is equal, to this
order in $\beta$, to the complete forward-backward asymmetry $A_{FB}^t$.


title: A theoretical update on t \bar{t} production near threshold

abstract:
  We present an evaluation of the t\bar{t} cross section near threshold at
next-to-next-to-leading logarithmic accuracy, using a two-step matching
procedure. QED corrections are taken into account as well and are shown to be
numerically important. Finally we give an outlook on how to further improve the
theoretical predictions with particular emphasis on how to consistently include
finite width effects.


title: Impact of QED corrections to Higgs decay into four leptons at the LHC

abstract:
  At the LHC a precise measurement of the Higgs boson mass (if discovered), at
the level of 0.1-1%, will be possible through the channel g g --> H --> 4l for
a wide range of Higgs mass values. To match such an accuracy, the systematic
effects induced by QED corrections need to be investigated. In the present
study the calculation of O(alpha) and higher order QED corrections is
illustrated as well as their impact on the Higgs mass determination, once
realistic event selection criteria for charged leptons and photons are
considered.


title: Measurement of the top-Higgs Yukawa coupling at a Linear e+e- Collider

abstract:
  Understanding the mechanism of electroweak symmetry breaking and the origin
of boson and fermion masses is among the most pressing questions raised in
contemporary particle physics. If these issues involve one (several) Higgs
boson(s), a precise measurement of all its (their) properties will be of prime
importance. Among those, the Higgs coupling to matter fermions (the Yukawa
coupling). At a Linear Collider, the process e+e- -> ttH will allow in
principle a direct measurement of the top-Higgs Yukawa coupling. We present a
realistic feasibility study of the measurement in the context of the TESLA
collider. Four channels are studied and the analysis is repeated for several
Higgs mass values within the range 120 GeV - 200 GeV.


title: Precision Electroweak Physics

abstract:
  The status in electroweak precision physics is reviewed. I present a brief
summary of the latest data, global fit results, a few implications for new
physics, and an outlook.


title: Effects from inhomogeneities in the chiral transition

abstract:
  We consider an approximation procedure to evaluate the finite-temperature
one-loop fermionic density in the presence of a chiral background field which
systematically incorporates effects from inhomogeneities in the chiral field
through a derivative expansion. We apply the method to the case of a simple
low-energy effective chiral model which is commonly used in the study of the
chiral phase transition, the linear sigma-model coupled to quarks. The
modifications in the effective potential and their consequences for the bubble
nucleation process are discussed.


title: Black Box QGP

abstract:
  According to extensive ab initio calculations of lattice QCD, the very large
energy density available in heavy-ion collisions at SPS and now at RHIC must be
sufficient to generate quark-gluon plasma (QGP), a new state of matter in the
form of plasma of free quarks and gluons. The new state of matter discovered at
RHIC seems to be perfect fluid rather than free plasma. Its shear viscosity is
assumed to be almost zero. In this work, I first considered the theoretical and
phenomenological consequences of this discovery and finally asked questions
about the nature of phase transition and properties of matter. It is important
to answer these questions, otherwise QGP will remain a kind of black box; one
sends a signal via new experiments or simulations or models and gets another
one from it. I will show that some promising ideas have already been suggested
a long time ago. I will also suggest a new phase diagram with separated
deconfinement and freeze-out boundaries and a mixed state of thermal quark
matter and bubbles of hadron gas.


title: The Sybils' Advice on Charm (and $\tau$ Leptons)

abstract:
  The importance of future studies of charm and $\tau$ decays is emphasized as
probes of New Physics: the most powerful tools are \cp asymmetries in charm and
$\tau$ decays both in partial widths and final state distributions. While these
searches for \cp violation are instrumentalized in the search for and hopefully
future analysis of New Physics, they might also shed light on the \cp breaking
dynamics required to implement baryogenesis. $e^+e^-$ Super-Flavour Factories
are optimally suited for the challenge, in many aspects even uniquely so.


title: Solution for the BFKL Pomeron Calculus in zero transverse dimensions

abstract:
  In this paper the exact analytical solution is found for the BFKL Pomeron
calculus in zero transverse dimensions, in which all Pomeron loops have been
included. The comparison with the approximate methods of the solution is given,
and the kinematic regions are discussed where they describe the behaviour of
the scattering amplitude quite well. In particular, the semi-classical approach
is considered, which reproduces the main properties of the exact solution at
large values of rapidity ($Y \geq 10$). It is shown that the mean field
approximation leads to a good description of the scattering amplitude only if
the amplitude at low energy is rather large. However, even in this case, it
does not lead to the correct asymptotic behaviour of the scattering amplitude
at high energies.


title: Estimations of baryon asymmetry for different neutrino mass models

abstract:
  We present a comparison of the numerical prediction on baryon asymmetry of
the Universe in different neutrino mass models. We start with a very brief
review on the main formalism of baryogenesis via leptogenesis through decay of
heavy right-handed Majorana neutrinos, and then calculate the baryon asymmetry
of the universe for known six neutrino mass models viz., three
quasi-degenerate, two inverted and one normal hierarchical models, which are
derived from canonical seesaw formula. The corresponding mass matrices for the
right-handed Majorana neutrino as well as the Dirac neutrino, which are fixed
at the seesaw stage for generating correct light neutrino mass matrices, are
again employed in the calculation of baryogenesis. This procedure removes
possible ambiguity on the choices of Dirac neutrino and right-handed Majorana
mass matrices, and fixes input parameters at the seesaw stage. We find that the
ranges of predictions from both normal hierarchical model and degenerate model
(DegT1A) are almost consistent with the observed baryon asymmetry of the
universe. Combining the present result with other predictions such as light
neutrino masses and mixing angles, and stability under radiative corrections in
MSSM, the normal hierarchical model appears to be the most favourable choice of
nature.


title:
Addendum to "Helicity conservation in gauge boson scattering at high
  energy"

abstract:
  In a previous paper we have established that for any two-body process
involving even numbers of transverse vector bosons and gauginos, the dominant
asymptotic amplitudes obey helicity conservation (HC); i.e. the sum of the
helicities of the two incoming particles equals to the sum of the helicities of
the two outgoing ones.
  This HC has been proved to all orders in MSSM, provided $(s, |t|,|u|)$ are
much larger than all masses in the model; but only to leading 1-loop
logarithmic order in SM. In the present addendum, the validity of HC is
extended to all two-body processes. Renormalizability is crucial for the HC
validity, while all known anomalous couplings violate it.


title:
Theoretical uncertainties on quasielastic charged-current
  neutrino-nucleus cross sections

abstract:
  We estimate the theoretical uncertainties of the model developed in Phys.
Rev. C70 055503 for inclusive quasielastic charged-current neutrino-nucleus
reactions at intermediate energies. Besides we quantify the deviations of the
predictions of this many body framework from those obtained within a simple
Fermi gas model. An special attention has been paid to the ratio
\sigma(\mu)/\sigma(e) of interest for experiments on atmospheric neutrinos. We
show that uncertainties affecting this ratio are likely smaller than 5%


title: Chiral Perturbation Theory Beyond One Loop

abstract:
  The existing Chiral Perturbation Theory (ChPT) calculations at order $p^6$
are reviewed. The principles of ChPT and how they are used are introduced. The
main part is a review of the two- and three-flavour full two-loop calculations
and their comparison with experiment. We restrict the discussion to the mesonic
purely strong and semileptonic sector. The review concludes by mentioning the
existing results in finite volume, finite temperature and partially quenched
ChPT.


title: On Neutrino Oscillations and Time-Energy Uncertainty Relation

abstract:
  We consider neutrino oscillations as non stationary phenomenon based on
Schrodinger evolution equation and mixed neutrino states with definite flavor.
  We demonstrate that for such states invariance under translations in time
does not take place. We show that time-energy uncertainty relation plays a
crucial role in neutrino oscillations. We compare neutrino oscillations with
$K^{0}\leftrightarrows\bar K^{0}$, $B_{d}^{0}\leftrightarrows\bar B_{d}^{0}$
etc oscillations.


title:
Space-time propagation of neutrino wave packets at high temperature and
  density

abstract:
  We study the space-time evolution of ``flavor'' neutrino wave-packets at
finite temperature and density in the early Universe prior to BBN. We implement
non-equilibrium field theory methods and linear response to study the
space-time evolution directly from the effective Dirac equation in the medium.
There is a rich hierarchy of time scales associated with transverse and
longitudinal dispersion and coherence. A phenomenon of ``freezing of
coherence'' is a result of a competition between longitudinal dispersion and
the separation of wave-packets of propagating modes in the medium. Near a
resonance the coherence and oscillation time scales are enhanced by a factor
$1/\sin2\theta$ compared to the vacuum. Collisional relaxation via charged and
neutral currents occurs on time scales much shorter than the coherence time
scale and for small vacuum mixing angle, shorter than the oscillation scale.
Assuming that the momentum spread of the initial wave packet is determined by
the large angle scattering mean free path of charged leptons, we find that the
transverse dispersion time scale is the shortest and is responsible for a large
suppression in both the survival and transition probabilities on time scales
much shorter than the Hubble time. For small mixing angle the oscillation time
scale is \emph{longer} than the collisional relaxation scale. The method also
yields the evolution of right-handed wave packets. Corrections to the
oscillation frequencies emerge from wave-packet structure as well as from the
energy dependence of mixing angles in the medium.


title: CP violation through particle mixing and the H-A lineshape

abstract:
  We consider the possibility of looking for CP-mixing effects in two-Higgs
doublet models (and particularly in the MSSM) by studying the lineshape of the
CP-even (H) and CP-odd (A) neutral scalars. In most cases H and A come quite
degenerate in mass, and their s-channel production would lead to nearly
overlapping resonances. CP-violating effects may connect these two Higgs
bosons, giving origin to one-loop particle mixing, which, due to their mass
proximity, can be resonantly enhanced. The corresponding transition amplitude
contains then CP-even and CP-odd components; besides the signal of
intereference between both amplitudes, leading to a CP-odd asymmetry, we
propose to look for the mixing probability itself, a quantity which, although
CP-even, can originate only from a CP-odd amplitude. We show that, in general,
the effect of such a mixing probability cannot be mimicked by (or be
re-absorbed into) a simple redefinition of the H and A masses in the context of
a CP-conserving model. Specifically, the effects of the CP-mixing are such
that, either the mass-splitting of the H and A bosons cannot be accounted for
in the absence of CP-mixing, and/or the detailed energy dependence of the
produced lineshape is clearly different from the one obtained by redefining the
masses, but not allowing any mixing. This analysis suggests that the detailed
study of the lineshape of this Higgs system may provide valuable information on
the CP nature of the underlying theory.


title: Discriminating large extra dimensions at the ILC with polarized beams

abstract:
  Non-standard scenarios described by effective interactions can manifest
themselves indirectly, via corrections to the Standard Model cross sections. It
should be desirable to identify at a given confidence level the source of such
deviations among the different possible explanations. We here discuss the
identification reach on gravity in extra dimensions from the four-fermion
compositeness-inspired contact interactions and viceversa, using as basic
observable the differential cross section of $e^+e^-\to\bar{f}f$ at the ILC,
and emphasize the role of beams polarization in enhancing the identification
sensitivity.


title:
Determination of New Electroweak Parameters at the ILC - Sensitivity to
  New Physics

abstract:
  We present a study of the sensitivity of an International Linear Collider
(ILC) to electroweak parameters in the absence of a light Higgs boson. In
particular, we consider those parameters that have been inaccessible at
previous colliders, quartic gauge couplings. Within a generic effective-field
theory context we analyze all processes that contain quasi-elastic weak-boson
scattering, using complete six-fermion matrix elements in unweighted event
samples, fast simulation of the ILC detector, and a multidimensional parameter
fit of the set of anomalous couplings. The analysis does not rely on
simplifying assumptions such as custodial symmetry or approximations such as
the equivalence theorem. We supplement this by a similar new study of triple
weak-boson production, which is sensitive to the same set of anomalous
couplings. Including the known results on triple gauge couplings and oblique
corrections, we thus quantitatively determine the indirect sensitivity of the
ILC to new physics in the electroweak symmetry-breaking sector, conveniently
parameterized by real or fictitious resonances in each accessible spin/isospin
channel.


title: Exotic Tetraquark ud bar[s] bar[s] of J^P=0^+ in the QCD Sum Rule

abstract:
  We study a QCD sum rule analysis for an exotic tetraquark ud bar[s] bar[s] of
J^P=0^+ and I = 1. We construct q q bar[q] bar[q] currents in a local product
form and find that there are five independent currents for this channel. Due to
high dimensional nature of the current, it is not easy to form a good sum rule
when using a single current. This means that we do not find any sum rule window
to extract reliable results, due to the insufficient convergence of the OPE and
to the exceptional important role of QCD continuum. Then we examine sum rules
by using currents of linear combinations of two currents among the independent
ones. We find two reasonable cases that predict a mass of the tetraquark around
1.5 GeV.


title: Nucleon Form Factors in QCD

abstract:
  We calculate the electromagnetic and the axial form factors of the nucleon
within the framework of light cone sum rules (LCSR) to leading order in QCD and
including higher twist corrections. In particular we motivate a certain choice
for the interpolating nucleon field. We find that a simple model of the nucleon
distribution amplitudes which deviate from their asymptotic shape, but much
less compared to the QCD sum rule estimates, allows one to describe the data
remarkably well.


title: NJL model derived from QCD

abstract:
  We apply Bogolubov approach to QCD with two light quarks to demonstrate a
spontaneous generation of an effective interaction, leading to the Nambu --
Jona-Lasinio model. The resulting theory contains two parameters: average
low-energy value of $\alpha_s$ and current light quark mass $m_0$. All other
low-energy parameters: the pion decay constant, mass of the $\pi$-meson, mass
of the $\sigma$-meson and its width, the constituent quark mass, the quark
condensate are expressed in terms of the two input parameters in satisfactory
correspondence to experimental data and chiral phenomenology. {\it E.g.} in the
approximation being used we have for $\alpha_s = 0.67$ and $m_0 = 20 MeV$:
$f_\pi = 93 MeV, m_\pi = 135 MeV, m_\sigma = 492 MeV, \Gamma_\sigma = 574 MeV,
m_q = 295 MeV, <\bar q q> = -(222 MeV)^3$.


title:
Seesaw scales and the steps from the Standard Model towards
  superstring-inspired flipped E_6

abstract:
  Recently in connection with Superstring theory E_8 and E_6 unifications
became very promising. In the present paper we have investigated a number of
available paths from the Standard Model (SM) to the E_6 unification,
considering a chain of flipped models following the extension of the SM:
  SU(3)_C\times SU(2)_L\times U(1)_Y \to
  SU(3)_C\times SU(2)_L\times U(1)_X \times U(1)_Z \to
  SU(5)\times U(1)_X \to
  SU(5)\times U(1)_{Z1} \times U(1)_{X1} \to
  SO(10) \times U(1)_{X1} \to
  SO(10) \times U(1)_{Z2}\times U(1)_{X2} \to
  E_6\times U(1)_{X2} or E_6,
  Also we have considered a chain with a left-right symmetry:
  SU(3)_C\times SU(2)_L\times U(1)_Y \to
  SU(3)_C\times SU(2)_L \times SU(2)_R\times U(1)_X\times U(1)_Z \to
  SU(4)_C\times SU(2)_L \times SU(2)_R\times U(1)_Z \to
  SO(10)\times U(1)_Z \to
  E_6.
  We have presented four examples including non-supersymmetric and
supersymmetric extensions of the SM and different contents of the Higgs bosons
providing the breaking of the flipped SO(10) and SU(5) down to the SM. It was
shown that the final unification E_6\times U(1) or E_6 at the (Planck) GUT
scale M_{SSG} depends on the number of the Higgs boson representations
considered in theory.


title:
Next-to-Next-to-Leading Order Evolution of Non-Singlet Fragmentation
  Functions

abstract:
  We have investigated the next-to-next-to-leading order (NNLO) corrections to
inclusive hadron production in e^+e^- annihilation and the related parton
fragmentation distributions, the `time-like' counterparts of the `space-like'
deep-inelastic structure functions and parton densities. We have re-derived the
corresponding second-order coefficient functions in massless perturbative QCD,
which so far had been calculated only by one group. Moreover we present, for
the first time, the third-order splitting functions governing the NNLO
evolution of flavour non-singlet fragmentation distributions. These results
have been obtained by two independent methods relating time-like quantities to
calculations performed in deep-inelastic scattering. We briefly illustrate the
numerical size of the NNLO corrections, and make a prediction for the
difference of the yet unknown time-like and space-like splitting functions at
the fourth order in the strong coupling constant.


title: Weighted finite energy sum rules for the omega meson in nuclear matter

abstract:
  The possible in-medium changes of the properties of an omega meson placed in
cold nuclear matter are constrained by QCD sum rules. It is shown that the sum
rules cannot fully determine the in-medium spectral shape of the omega meson.
However, for a given parameterization the sum rules can constrain or correlate
the hadronic parameters. It is shown that weighted finite energy sum rules
provide a proper framework to study directly these constraints/correlations.
Two typical parameterizations of possible in-medium omega spectra are analyzed,
namely (i) a one-peak structure with arbitrary position and width of the peak
and (ii) a structure with two (narrow) peaks, caused by the genuine omega meson
and a resonance-hole branch. The sum rules provide for case (i) a mass-width
correlation and for case (ii) a correlation between the peak heights and the
peak position of the omega branch. It is also analyzed how the obtained results
depend on the size of the relevant four-quark operator evaluated with respect
to a nucleon. Finally it is argued that a strict vector meson dominance
scenario is not compatible with the sum rules.


title:
Fate of QCD sum rules or fate of vector meson dominance in a nuclear
  medium

abstract:
  A current-current correlator with the quantum numbers of the omega meson is
studied in a nuclear medium. Using weighted finite energy sum rules and
dispersion relations for the current-nucleon forward scattering amplitude it is
shown that strict vector meson dominance and QCD sum rules are incompatible
with each other. This implies that at least one of these concepts -- which are
both very powerful in the vacuum -- has to fade in the nuclear environment.


title: Is the QCD ghost dressing function finite at zero momentum ?

abstract:
  We show that a finite non-vanishing ghost dressing function at zero momentum
satisfies the scaling properties of the ghost propagator Schwinger-Dyson
equation. This kind of Schwinger-Dyson solutions may well agree with lattice
data and provides an interesting alternative to the widely spread claim that
the gluon dressing function behaves like the inverse squared ghost dressing
function, a claim which is at odds with lattice data. We demonstrate that, if
the ghost dressing function is less singular than any power of $p$, it must be
finite non-vanishing at zero momentum: any logarithmic behaviour is for
instance excluded. We add some remarks about coupled Schwinger-Dyson analyses.


title:
Minimal Flavour Violation Waiting for Precise Measurements of Delta M_s,
  S_{psi phi}, A^s_SL, |V_ub|, gamma and B^0_{s,d} -> mu+ mu-

abstract:
  We emphasize that the recent measurements of the B^0_s - bar B^0_s mass
difference Delta M_s by the CDF and D0 collaborations offer an important model
independent test of minimal flavour violation (MFV). The improved measurements
of the angle gamma in the unitarity triangle and of |V_ub| from tree level
decays, combined with future accurate measurements of Delta M_s, S_{psi K_S},
S_{psi phi}, Br(B_{d,s} -> mu+ mu-), Br(B -> X_{d,s} nu bar nu), Br(K+ -> pi+
nu bar nu) and Br(K_L -> pi^0 nu bar nu) and improved values of the relevant
non-perturbative parameters, will allow to test the MFV hypothesis in a model
independent manner to a high accuracy. In particular, the difference between
the reference unitarity triangle obtained from tree level processes and the
universal unitarity triangle (UUT) in MFV models would signal either new
flavour violating interactions and/or new local operators that are suppressed
in MFV models with low tan(beta), with the former best tested through S_{psi
phi} and K_L -> pi^0 nu bar nu. A brief discussion of non-MFV scenarios is also
given. In this context we identify in the recent literature a relative sign
error between Standard Model and new physics contributions to S_{psi phi}, that
has an impact on the correlation between S_{psi phi} and A^s_SL. We point out
that the ratios S_{psi phi}/A^s_SL and (Delta M_s)/(Delta Gamma_s) will allow
to determine (Delta M_s)/(Delta M_s)^SM. Similar proposals for the
determination of (Delta M_d)/(Delta M_d)^SM are also given.


title:
Four-quark condensates and chiral symmetry restoration in a resonance
  gas model

abstract:
  As an alternative to the two-quark condensate we propose a specific
four-quark condensate as an order parameter of chiral symmetry restoration. We
show that this four-quark condensate is closer connected to observable
quantities. Within a resonance gas model we calculate the in-medium changes of
two- and four-quark condensate as functions of temperature and baryo-chemical
potential. In this way we estimate the line of chiral symmetry restoration in
the temperature-potential plane and also as a function of energy and baryon
density. It turns out that the line determined from the vanishing of the
four-quark condensate is extremely constant as a function of the energy
density.


title: Explicit form of the Isgur-Wise function in the BPS limit

abstract:
  Using previously formulated sum rules in the heavy quark limit of QCD, we
demonstrate that if the slope rho^2 = -xi'(1) of the Isgur-Wise function xi(w)
attains its lower bound 3/4, then all the derivatives (-1)^L xi^(L)(1) attain
their lower bounds (2L+1)!!/2^(2L), obtained by Le Yaouanc et al. This implies
that the IW function is completely determined, given by the function xi(w) =
[2/(w+1)]^(3/2). Since the so-called BPS condition proposed by Uraltsev implies
rho^2 = 3/4, it implies also that the IW function is given by the preceding
expression.


title:
The pressure of deconfined QCD for all temperatures and quark chemical
  potentials

abstract:
  We present a new method for the evaluation of the perturbative expansion of
the QCD pressure which is valid at all values of the temperature and quark
chemical potentials in the deconfined phase and which we work out up to and
including order g^4 accuracy. Our calculation is manifestly four-dimensional
and purely diagrammatic -- and thus independent of any effective theory
descriptions of high temperature or high density QCD. In various limits, we
recover the known results of dimensional reduction and the HDL and HTL
resummation schemes, as well as the equation of state of zero-temperature quark
matter, thereby verifying their respective validity. To demonstrate the overlap
of the various regimes, we furthermore show how the predictions of dimensional
reduction and HDL resummed perturbation theory agree in the regime
T~\sqrt{g}*mu. At parametrically smaller temperatures T~g*mu, we find that the
dimensional reduction result agrees well with those of the nonstatic
resummations down to the remarkably low value T~0.2 m_D, where m_D is the Debye
mass at T=0. Beyond this, we see that only the latter methods connect smoothly
to the T=0 result of Freedman and McLerran, to which the leading small-T
corrections are given by the so-called non-Fermi-liquid terms, first obtained
through HDL resummations. Finally, we outline the extension of our method to
the next order, where it would include terms for the low-temperature entropy
and specific heats that are unknown at present.


title:
Determining Delta_Gamma_s / Gamma_s from Bf(B_s \to D_s^{(*)+}
  D_s{(*)-}) measurements at e^+ e^- colliders running on the Y(5S) resonance

abstract:
  The feasibility of determining $\Delta \Gamma_s / Gamma_s$ from $B_s \to
D_s^{(*)+} D_s^{(*)-}$ decay branching fraction measurements at $e^+ e^-$
colliders running on the $\Upsilon$(5S) resonance is discussed. The expected
accuracies of the $B_s \to D_s^{(*)+} D_s^{(*)-}$ branching fraction
measurements and the $\Delta \Gamma_s / \Gamma_s$ determination with
50fb$^{-1}$ of data at the $\Upsilon$(5S) are estimated using Monte Carlo
simulation. Comparison of that measurement with a directly measured $\Delta
\Gamma_s / \Gamma_s$ value within and beyond Standard Model is discussed. A new
method of estimating $\Delta \Gamma_s / \Gamma_s$ is proposed, based on
comparing the CP-even and CP-odd components in $B^0 \to J/\Psi K^{*0}$ and $B_s
\to J/\Psi \phi$ decays. A comparison of $B_s$ and $B^0$ lifetime measurements
with theoretical predictions is discussed.


title: Mixing of photons with massive spin-two particles in a magnetic field

abstract:
  We study the mixing of photons with hypothetical massive spin-two particles
in the presence of a magnetic field. Mixing phenomena have been studied in the
case of axion-like particles and strictly massless spin-two particles
(gravitons) but not in this case. We find several interesting differences
between them.


title: Leptogenesis in a model of Dark Energy and Dark Matter

abstract:
  A recent model of dark energy and dark matter was proposed, involving a new
gauge group $SU(2)_Z$ whose coupling grows strong at a scale $\Lambda_Z \sim
10^{-3} eV$, a result which is obtained from a simple assumption that its
initial value at some high energy scale $M \sim 10^{16} GeV$ is of the order of
a typical Standard Model (SM) coupling at a similar scale. (This assumption
comes naturally from an embedding of $SU(2)_Z$ and the SM into a grand unified
group $E_6$.) It is found that the proposed model contains a SM lepton-number
violating Yukawa coupling involving a scalar ``messenger field''
${\tilde{\bm{\phi}}}^{(Z)}$ (which carries both $SU(2)_Z$ and electroweak
quantum numbers), a $SU(2)_Z$ fermion $\psi^{(Z)}$ and a SM lepton $l$. The
interference between the tree-level and one-loop decay amplitude for
${\tilde{\bm{\phi}}}^{(Z)} \to \psi^{(Z)} + l$ generates a SM lepton asymmetry
which is subsequently converted into a baryon asymmetry through electroweak
sphaleron processes. This constrains the mass of the messenger field to be less
than $1 TeV$, making it accessible to searches at future colliders: the
``progenitor'' of a net lepton number (and hence a net baryon number) could
possibly be found and identified experimentally.


title: Signatures for Majorana neutrinos at hadron colliders

abstract:
  The Majorana nature of neutrinos may only be experimentally verified via
lepton-number violating processes involving charged leptons. We explore the
$\Delta L=2$ like-sign dilepton production at hadron colliders to search for
signals of Majorana neutrinos. We find significant sensitivity for resonant
production of a Majorana neutrino in the mass range of 10-80 GeV at the current
run of the Tevatron with 2 fb$^{-1}$ integrated luminosity, and in the range of
10-400 GeV at the LHC with 100 fb$^{-1}$.


title: Improving jet distributions with effective field theory

abstract:
  We obtain perturbative expressions for jet distributions using soft-collinear
effective theory (SCET). By matching SCET onto QCD at high energy, tree level
matrix elements and higher order virtual corrections can be reproduced in SCET.
The resulting operators are then evolved to lower scales, with additional
operators being populated by required threshold matchings in the effective
theory. We show that the renormalization group evolution and threshold
matchings reproduce the Sudakov factors and splitting functions of QCD, and
that the effective theory naturally combines QCD matrix elements and parton
showers. The effective theory calculation is systematically improvable and any
higher order perturbative effects can be included by a well defined procedure.


title: Twin SUSY

abstract:
  We construct an extension of the MSSM in which superpartners can naturally be
heavier than the electroweak scale. This ``little hierarchy'' of scales is
stable because the Higgs arises as a pseudo-Nambu-Goldstone boson in the
breaking of an accidental SU(4) symmetry of the Higgs sector. Supersymmetry and
the global symmetry combine to forbid logarithmically divergent one-loop
contributions to the Higgs mass. The accidental symmetry follows from a simple
``twin'' parity which exchanges the SU(2) sectors in the SU(3)_C x SU(2)_L x
SU(2)_R x U(1)_X gauge group.


title:
Emergence of Complex Spatio-Temporal Behavior in Nonlinear Field
  Theories

abstract:
  We investigate the emergence of time-dependent nonperturbative configurations
during the evolution of nonlinear scalar field models with symmetric and
asymmetric double-well potentials. Complex spatio-temporal behavior emerges as
the system seeks to establish equipartition after a fast quench. We show that
fast quenches may dramatically modify the decay rate of metastable states in
first order phase transitions. We briefly suggest possible applications
incondensed matter systems and early universe cosmology.


title: The Art of Computing Loop Integrals

abstract:
  A perturbative approach to quantum field theory involves the computation of
loop integrals, as soon as one goes beyond the leading term in the perturbative
expansion. First I review standard techniques for the computation of loop
integrals. In a second part I discuss more advanced algorithms. For these
algorithms algebraic methods play an important role. A special section is
devoted to multiple polylogarithms.
  I tried to make these notes self-contained and accessible both to physicists
and mathematicians.


title: A Paradox on Quantum Field Theory of Neutrino Mixing and Oscillations

abstract:
  Neutrino mixing and oscillations in quantum field theory framework had been
studied before, which shew that the Fock space of flavor states is unitarily
inequivalent to that of mass states (inequivalent vacua model). A paradox
emerges when we use these neutrino weak states to calculate the amplitude of
$W$ boson decay. The branching ratio of W(+) -> e(+) + nu_mu to W(+) -> e(+) +
nu_e is approximately at the order of O({m_i^2}/{k^2}). The existence of flavor
changing currents contradicts to the Hamiltonian we started from, and the usual
knowledge about weak processes. Also, negative energy neutrinos (or violating
the principle of energy conservation) appear in this framework. We discuss
possible reasons for the appearance of this paradox.


title: The Importance of Weak Bosons Emission at LHC

abstract:
  We point out that gauge bosons emissions should be carefully estimated when
considering LHC observables, since real $Ws$ and $Zs$ contributions can
dramatically change cross sections with respect to tree level values.
  Here we consider observables that are fully inclusive respect to soft gauge
bosons emission and where a certain number of nonabelian isospin charges in
initial and/or final states are detected. We set up a general formalism to
evaluate leading, all order resummed electroweak corrections and we consider
the phenomenologically relevant case of third family quark production at the
LHC. In the case of $b\bar{t}$ production we find that, due to the interplay
between strong and weak interactions, the production cross section can become
an order of magnitude bigger than the tree level value.


title:
Estimates of the uncertainties associated with models of the nucleon
  structure functions in the $\Delta$ production region

abstract:
  Theoretical studies of the inclusive electron-nucleus cross section at beam
energies up to few GeV show that, while the region of the quasi-elastic peak is
understood at quantitative level, the data in the $\Delta$ production region
are sizably underestimated. We analize the uncertainty associated with the
description of the nucleon structure functions $W_1$ and $W_2$ and its impact
on the nuclear cross section. The results of our study suggest that the failure
to reproduce the data is to be mostly ascribed to the poor knowledge of the
neutron structure functions at low $Q^2$.


title: Two-Loop Matching Coefficients for Heavy Quark Currents

abstract:
  In this paper we consider the matching coefficients up to two loops between
Quantum Chromodynamics (QCD) and Non-Relativistic QCD (NRQCD) for the vector,
axial-vector, scalar and pseudo-scalar currents. The structure of the effective
theory is discussed and analytical results are presented. Particular emphasis
is put on the singlet diagrams.


title:
The sum rules for the spin dependent structure functions $g_1$ in the
  isovector reaction

abstract:
  In the isovector reaction, the sum rule for the spin dependent function $g_1$
which is related to the cross section of the photoproduction is derived. In the
small $Q^2$ region, the sum rule is dominated by the low energy contribution
and it tightly connects the resonance, the elastic, and the non-resonant
contributions.


title: Exploring the flavour structure of the MSSM with rare K decays

abstract:
  We present an extensive analysis of rare K decays, in particular of the two
neutrino modes K+->pi+ nu nu-bar and KL->pi0 nu nu-bar, in the Minimal
Supersymmetric extension of the Standard Model. We analyse the expectations for
the branching ratios of these modes, both within the restrictive framework of
the minimal flavour violation hypothesis and within a more general framework
with new sources of flavour-symmetry breaking. In both scenarios, the
information that can be extracted from precise measurements of the two neutrino
modes turn out to be very useful in restricting the parameter space of the
model, even after taking into account the possible information on the mass
spectrum derived from high-energy colliders, and the constraints from B-physics
experiments. In the presence of new sources of flavour-symmetry breaking,
additional significant constraints on the model can be derived also from the
two KL->pi0 l+l- modes.


title: Determination of constants of Standard Model and some generalized models

abstract:
  Methods of determination of constants of the Standard Model are considered.
The constants values obtained now are presented and experiments for improving
some values are pointed out. A few possible generalized models are considered
together with their groups of gauge and kinematical symmetries.


title: A Supersymmetric Twin Higgs

abstract:
  We present a supersymmetric realization of the twin Higgs mechanism, which
cancels off all contributions to the Higgs mass generated above a scale f.
Radiative corrections induced by the top quark sector lead to a breaking of the
twin sector electroweak symmetry at a scale f ~ TeV. In our sector, below the
scale f, these radiative corrections from the top quark are present but greatly
weakened, naturally allowing a Z boson mass an order of magnitude below f, even
with a top squark mass of order 1 TeV and a messenger scale near the Planck
mass. A sufficient quartic interaction for our Higgs boson arises from the
usual gauge contribution together with a radiative contribution from a heavy
top squark. The mechanism requires the presence of an SU(2)-adjoint superfield,
and can be simply unified. Naturalness in these theories is usually associated
with light winos and sleptons, and is largely independent of the scale of the
colored particles. The assumption of unification naturally predicts the
existence of many exotic fields. The theory often has particles which may be
stable on collider timescales, including an additional color octet superfield.
In the limit that m_SUSY >> f, the mechanism yields a UV completion of the
non-supersymmetric twin Higgs, but with the notable improvement of a tree-level
quartic for the standard model Higgs. In this framework, a successful UV
completion requires the existence of new charged fields well below the scale f.


title:
Combining Monte Carlo generators with next-to-next-to-leading order
  calculations: event reweighting for Higgs boson production at the LHC

abstract:
  We study a phenomenological ansatz for merging next-to-next-to-leading order
(NNLO) calculations with Monte Carlo event generators. We reweight them to
match bin-integrated NNLO differential distributions. To test this procedure,
we study the Higgs boson production cross-section at the LHC, for which a fully
differential partonic NNLO calculation is available. We normalize PYTHIA and
MC@NLO Monte Carlo events for Higgs production in the gluon fusion channel to
reproduce the bin integrated NNLO double differential distribution in the
transverse momentum and rapidity of the Higgs boson. These events are used to
compute differential distributions for the photons in the pp \to H \to \gamma
\gamma decay channel, and are compared to predictions from fixed-order
perturbation theory at NNLO. We find agreement between the reweighted
generators and the NNLO result in kinematic regions where we expect a good
description using fixed-order perturbation theory. Kinematic boundaries where
resummation is required are also modeled correctly using this procedure. We
then use these events to compute distributions in the pp \to H \to W^+W^- \to
l^+l^- \nu\bar{\nu} channel, for which an accurate description is needed for
measurements at the LHC. We find that the final state lepton distributions
obtained from PYTHIA are not significantly changed by the reweighting
procedure.


title: Muon Simulations for Super-Kamiokande, KamLAND and CHOOZ

abstract:
  Muon backgrounds at Super-Kamiokande, KamLAND and CHOOZ are calculated using
MUSIC. A modified version of the Gaisser sea level muon distribution and a
well-tested Monte Carlo integration method are introduced. Average muon energy,
flux and rate are tabulated. Plots of average energy and angular distributions
are given. Implications on muon tracker design for future experiments are
discussed.


title:
Second Order Thermal Corrections to Vacuum Polarization in QED -- A
  Covariant approach

abstract:
  We study the electromagnetic properties of a hot medium at temperatures below
electron mass. It was observed earlier that the first order hot loop
corrections do not affect the electromagnetic properties of hot media due to
the absence of self-interaction of photons. However, the second order
contributions are found to modify these properties due to the overlapping hot
and cold loops. It has also been noticed that the hot loops have to be
integrated before the cold ones to establish the order by order cancelation of
singularities to ensure renormalizability of the theory. It is also explicitly
shown that the perturbative series of QED is still a convergent series in a
covariant formalism at low temperatures.


title:
Time Variations of the Solar Neutrino Flux Data from Sage and Gallex-Gno
  Detectors by Simple Denoising Algorithm Using Wavelet Transform

abstract:
  We have used Simple Denoising Algorithm using Wavelet Transform on the
monthly solar neutrino flux data from (1) SAGE detector during the period from
1st January 1990 to 31st December 2000; (2) SAGE detector during the period
from April 1998 to December 2001; (3) GALLEX detector during the period from
May 1991 to January 1997; (4) GNO detector during the period from May 1998 to
December 2001; (5) GALLEX-GNO detector (combined data) from May 1991 to
December 2001 and (6) average of the data from GNO and SAGE detectors during
the period from May 1998 to December 2001. (1) exhibits periodicity around 20,
27, 36, 70, 90 and 114 months. (2) shows periodicity around 21, 28, 31 and 33
months. For (3) we observe periodicity around 24, 40, 54, 57, 59, 62 and 64
months. For (4) periodicity is seen around 23, 30 and 34 months. (5) gives
periodicity around 49, 57, 64, 74, 79, 88, 95 and 99 months while (6) shows
periodicity around 24, 32, 35 and 38 months. We have found almost similar
periods in the solar flares, sunspot data, solar proton data which indicates
that the solar activity cycle may be due to the variable character of nuclear
energy generation inside the sun.


title:
A Possible Quantum-Gravitational Origin of the Neutrino Mass Difference
  ?

abstract:
  We discuss the theoretical possibility that the neutrino mass differences
have part of their origin in the quantum-decoherence-inducing medium of
space-time foam, which characterises some models of quantum gravity, in much
the same way as the celebrated MSW effect, responsible for the contribution to
mass differences when neutrinos pass through ordinary material media. We
briefly describe consequences of such decoherent media in inducing CPT
violation at a fundamental level, which would affect the neutrino oscillation
probability; we speculate on the connection of such phenomena with the role of
neutrinos for providing one possible source of a cosmological constant in the
Universe, of the phenomenologically right order of magnitude. Finally we
discuss possible experimental constraints on the amount of neutrino mass
differences induced by quantum gravity, which are based on fits of a simple
decoherence model with all the currently available neutrino data.


title:
Large Strong Phases and CP Violation in the Annihilation Processes
  $\bar{B}^0\to K^+K^-$, $K^{*\pm}K^\mp$, $K^{*+}K^{*-}$

abstract:
  The strong phases and CP violation in the rare $\bar{B}^0\to K^+K^-$,
$K^{*\pm}K^\mp$, $K^{*+}K^{*-}$ decays are investigated. As these decays
proceed only via annihilation type diagrams in the standard model (SM), a
dynamical gluon mass is introduced to avoid the infrared divergence in the soft
endpoint regions. The Cutkosky rule is adopted to deal with a physical-region
singularity of the on mass-shell quark propagators, which leads to a big
imaginary part and hence a large strong phase. As a consequence, large CP
asymmetries are predicted in those decay modes due to a big interference
between the annihilation amplitudes from penguin and tree operators, which may
be tested in future more precise experiments.


title:
Gauge and Yukawa mediated supersymmetry breaking in the triplet seesaw
  scenario

abstract:
  We propose a novel supersymmetric unified scenario of the triplet seesaw
mechanism where the exchange of the heavy triplets generates both neutrino
masses and soft supersymmetry breaking terms. Our framework is very predictive
since it relates neutrino mass parameters, lepton flavour violation in the
slepton sector, sparticle and Higgs spectra and electroweak symmetry breakdown.
The phenomenological viability and experimental signatures in lepton flavor
violating processes are discussed.


title: Cusps in K --> 3 pi decays

abstract:
  The pion mass difference generates a pronounced cusp in K --> 3 pi decays. As
has recently been pointed out by Cabibbo and Isidori, an accurate measurement
of the cusp may allow one to pin down the S-wave pi pi scattering lengths to
high precision. Here, we present and illustrate an effective field theory
framework that allows one to determine the structure of this cusp in a
straightforward manner. The strictures imposed by analyticity and unitarity are
respected automatically.


title:
The Yin and Yang of High Energy Chromodynamics: Scattering in Black and
  White

abstract:
  We further discuss the QCD Reggeon field theory (RFT) as it emerges from the
JIMWLK/KLWMIJ evolution equation and beyond. We give an explicit expression for
the calculation of scattering amplitude in terms of the eigenstates of the RFT
Hamiltonian. We point out that the spectrum of RFT is doubly degenerate, the
degeneracy being related to the spontaneous breaking of the Dense-Dilute
Duality symmetry of RFT. The degeneracy is between the "almost white" states
(the Yang sector) which contain a small number of gluons, and "almost black"
states (the Yin sector). The excitations above the Yang vacuum have natural
interpretation in terms of gluons. Analogously the excitations above the Yin
vacuum have natural interpretation as "holes" in the black disk - points at
which an incoming gluon does not scatter with unit probability. We discuss in
detail the spectrum of the "parton model approximation" to the KLWMIJ evolution
introduced in our previous paper, and prove that it is explicitly selfdual.
This allows us to find explicitly the counterpart hole states in this
approximation. We also present an argument to the effect that the end point of
the evolution for any physical state cannot be a "grey disk" but must
necessarily be the "black disk" Yin vacuum state. Finally, we suggest an
approximation scheme for including the Pomeron loop contribution to the
evolution which requires only the solution of the JIMWLK/KLWMIJ Hamiltonian.


title:
Resummed one-loop determination of the phase boundary of the SU(3)_R x
  SU(3)_L linear sigma model in the m_pi-m_K-plane

abstract:
  Complete one-loop parametrization of the linear sigma model is performed and
the phase boundary between first order and crossover transition regions of the
m_pi-m_K-plane is determined using the optimized perturbation theory as a
resummation tool of perturbative series. Away from the physical point the
parameters of the model were determined by making use of chiral perturbation
theory. Along the diagonal m_pi=m_K of the mass--plane we estimate m_pi^c=110
+- 20 MeV. The location of the tricritical point on the m_pi=0 axis is
estimated in the interval m_K^TCP in (1700,1850) MeV.


title:
Towards a Nonperturbative Foundation of the Dipole Picture: II. High
  Energy Limit

abstract:
  This is the second of two papers in which we study real and virtual
photon-proton scattering in a nonperturbative framework. In the first paper we
have identified the leading contributions to this process at high energies and
have derived expressions for them which take into account the renormalisation
of the photon-quark-antiquark vertex. In the present paper we investigate the
approximations and assumptions that are necessary to obtain the dipole model of
high energy scattering from the results derived in the first paper. We discuss
the gauge invariance of different contributions to the scattering amplitude and
point out some subtleties related to gauge invariance in the correct definition
of a perturbative photon wave function. As a phenomenological consequence of
the dipole picture we derive a bound on the ratio of the cross sections for
longitudinally and transversely polarised photons. This bound is independent of
any particular model for the dipole-proton cross section and allows one to test
the validity of the assumptions leading to the dipole picture in particular at
low photon virtualities. We conclude that the naive dipole model formula should
be supplemented by two additional terms which can potentially become large at
small photon virtualities.


title: Do Neutrinos Violate CP?

abstract:
  In trying to answer the question in the title of my talk, I have argued on
ground of naturalness that leptonic CP violation is very likely to exist both
in the form of the Kobayashi-Maskawa type and the Majorana type phases. The
latter part of the argument has to be backed up by a general argument by
Yanagida which states that neutrinos must be Majorana particles because our
universe is asymmetric with respect to baryon number. The argument is reviewed.
Since the naturalness argument raises the possibility of naturally small
theta_{13} and theta_{23} - pi/4, I discuss possible experimental methods for
probing into these two small quantities. They include recent proposal of the
resonant nu_e-bar absorption reaction enhanced by the M"ossbauer effect which
may allow extremely high sensitivity for not only theta_{13} but also Delta
m^2_{31}. The issue of how to resolve the theta_{23} octant degeneracy is
briefly discussed with emphasis on the atmospheric neutrino observation and the
reactor-accelerator combined methods.


title: Pair creation in inhomogeneous fields from worldline instantons

abstract:
  We show how to do semiclassical nonperturbative computations within the
worldline approach to quantum field theory using ``worldline instantons''.
  These worldline instantons are classical solutions to the Euclidean worldline
loop equations of motion, and are closed spacetime loops parametrized by the
proper-time. Specifically, we compute the imaginary part of the one loop
effective action in scalar and spinor QED using worldline instantons, for a
wide class of inhomogeneous electric field backgrounds.


title: Decays of $D_{sj}^*(2317)$ and $D_{sj}(2460)$ Mesons in the Quark Model

abstract:
  We study the decay widths of the narrow resonances $D_{sj}^*(2317)$ and
$D_{sj}(2460)$ in the chiral quark model, together with the well-known $D^\ast$
and $D_s^*$ mesons. All the parameters in our calculation are taken from
Godfrey and Isgur's quark model except the $\pi^0-\eta$ mixing angle which is
fixed by the $D_s^*$ decay widths. The calculated electromagnetic decay widths
agree with those from other groups and the experimental data available quite
well. However, the pionic decay widths of $D_{sj}(2317)$ and $D_{sj}(2460)$ are
too small to fit the experimental data. We suspect that the simple chiral quark
pion axial-vector interaction Hamiltonian is not suitable for hadron strong
decays of $D_{sj}(2317)$ and $D_{sj}(2460)$.


title:
Fine-tuning in gauge mediated supersymmetry breaking models and induced
  top Yukawa coupling

abstract:
  It is shown that fine-tuning of the Higgs parameters stronger than a few % is
required at the best in the models with gauge mediated supersymmetry breaking.
With the aim of solving this problem, we consider a new type of models in which
the top Yukawa coupling is induced at TeV scale through mass mixing with
unknown matter fields. Then it is found that the fine-tuning problem can be
eliminated essentially. We discuss some phenomenological features of this model
and also consider the extension to the next-to-minimal models.


title: Target Mass Effects in Polarized Deep Inelastic Scattering

abstract:
  The target mass effects in polarized DIS have been studied. It was
demonstrated that taking into account the first order target mass corrections
to g1 a very good approximation of the exact formula is achieved. It was also
shown that their magnitude in the preasymptotic DIS region is small except for
x > 0.65, where their large effect is partially suppressed by the large values
of $Q^2$ due to the cut $W^2 > 4 GeV^2$. The difference between the size of the
target mass and higher twist corrections is illustrated.


title: Chiral symmetry breaking and stability of quark droplets

abstract:
  We discuss the stability of strangelets -- quark droplets with strangeness --
in the Nambu--Jona-Lasinio model supplemented by a boundary condition for quark
confinement. Effects of dynamical chiral symmetry breaking are considered
properly inside quark droplets of arbitrary baryon number. We obtain the energy
per baryon number of quark droplets with baryon number from one to thousands.
It is shown that strangelets are not the ground states as compared with nuclei,
though they can be locally stable.


title: Super-leading logarithms in non-global observables in QCD?

abstract:
  We reconsider the calculation of a non-global QCD observable and find the
possible breakdown of QCD coherence. This breakdown arises as a result of wide
angle soft gluon emission developing a sensitivity to emission at small angles
and it leads to the appearance of super-leading logarithms. We use the `gaps
between jets' cross-section as a concrete example and illustrate that the new
logarithms are intimately connected with the presence of Coulomb gluon
contributions. We present some rough estimates of their potential
phenomenological significance.


title:
Effect of Electric and Magnetic Fields on Spin Dynamics in the Resonant
  Electric Dipole Moment Experiment

abstract:
  A buildup of the vertical polarization in the resonant electric dipole moment
(EDM) experiment [Y. F. Orlov, W. M. Morse, and Y. K. Semertzidis, Phys. Rev.
Lett. 96, 214802 (2006)] is affected by a horizontal electric field in the
particle rest frame oscillating at a resonant frequency. This field is defined
by the Lorentz transformation of an oscillating longitudinal electric field and
a uniform vertical magnetic one. The effect of a longitudinal electric field is
significant, while the contribution from a magnetic field caused by forced
coherent longitudinal oscillations of particles is dominant. The effect of
electric field on the spin dynamics was not taken into account in previous
calculations. This effect is considerable and leads to decreasing the EDM
effect for the deuteron and increasing it for the proton. The formula for
resonance strengths in the EDM experiment has been derived. The spin dynamics
has been calculated.


title:
Neutrino-induced Electroweak Symmetry Breaking in Supersymmetric SO(10)
  Unification

abstract:
  The radiative electroweak symmetry breaking, the unification of
third-generation Yukawa couplings, and flavor-changing rare decay are
investigated in two types of supersymmetric SO(10) scenarios taking into
account of the effects of neutrino physics, i.e. the observed large generation
mixing and tiny mass scale. The first scenario is minimal, including
right-handed neutrinos at intermediate scale with the unification of
third-generation Yukawa couplings. Another is the case that the large mixing of
atmospheric neutrinos originates from the charged-lepton sector. Under the
SO(10)-motivated boundary conditions for supersymmetry-breaking parameters,
typical low-energy particle spectrum is discussed and the parameter space is
identified which satisfies the conditions for successful radiative electroweak
symmetry breaking and the experimental mass bounds of superparticles. In
particular, the predictions of the bottom quark mass and the b \to s gamma
branching ratio are fully analyzed. In both two scenarios, new types of
radiative electroweak symmetry breaking are achieved with the effects of
neutrino couplings. The Yukawa unification becomes compatible with the bottom
quark mass and the experimental constraints from flavor-violating rare
processes, and the hierarchical superparticle mass spectrum is obtained.


title: Diffraction in QCD

abstract:
  This lecture presents a short review of the main features of diffractive
processes and QCD inspired models. It includes the following topics: (1)
Quantum mechanics of diffraction: general properties; (2) Color dipole
description of diffraction; (3) Color transparency; (4) Soft diffraction in
hard reactions: DIS, Drell-Yan, Higgs production; (5) Why Pomerons interact
weakly; (6) Small gluonic spots in the proton; (7) Diffraction near the
unitarity bound: the Goulianos-Schlein "puzzle"; (8) Diffraction on nuclei:
diffractive Color Glass; (9) CGC and gluon shadowing.


title: Energy spectrum of the low-lying gluon excitations in the Coulomb gauge

abstract:
  We compute the energy spectrum of low-lying gluonic excitations in the
presence of static quark-antiquark sources using Coulomb gauge and the
quasi-particle representation. Within the valence sector of the Fock space we
reproduce both, the overall normalization and the ordering of the spin-parity
multiplets. We discus how the interactions induced by the non-abelian Coulomb
kernel are central in to fine structure of the spectrum.


title: Multipion decays of omega(782) and phi(1020)

abstract:
  Using the chiral model of pseudoscalar, vector, and axial vector mesons based
on the hidden local symmetry added with the terms induced by the Wess-Zumino
anomaly, the results of calculations of the branching fractions of the decays
omega(782) and phi(1020) mesons to the 2pi+ 2pi- pi0, pi+ pi -3pi0 multipion
states are presented.


title:
Z(3)-symmetric effective theory for SU(3) Yang-Mills theory at high
  temperature

abstract:
  A three-dimensional effective theory for high temperature SU(3) gauge theory,
which maintains the Z(3) center symmetry of the full theory, is constructed.
Such a Z(3) invariant effective theory should be applicable to a wider
temperature range than the usual effective theory, known as EQCD, which fails
to respect the center symmetry. This center-symmetric effective theory can
reproduce domain wall and phase transition properties that are not accessible
in EQCD. After identifying a convenient class of Z(3) invariant effective
theories, we constrain the coefficients of the various terms in the Lagrangian
using leading-order matching to EQCD at high temperature, plus matching of
domain wall properties in the full theory. We sketch the expected structure of
the phase diagram of the effective theory and briefly discuss the prospects of
numerical simulations and the addition of quarks.


title:
The planar four-point master integrals for massive two-loop Bhabha
  scattering

abstract:
  We present the values of the complete set of planar four-point Master
Integrals needed for massive Bhabha scattering in the limit of fixed angle and
high energy at the two-loop level. The integrals have been calculated using
direct expansions of Mellin-Barnes representations, followed by a resummation
of resulting harmonic series.