title: Outside the mSUGRA Box

abstract:
  Most studies of the potential for discovery of superpartners at the Fermilab
Tevatron or CERN LHC have focused on the so-called mSUGRA (minimal supergravity
mediated supersymmetry breaking) model, not because it is well motivated but
because it has a minimal number of parameters. If signals are seen that could
be superpartners, most analyses will attempt to interpret them in the mSUGRA
framework since the needed software and computational tools exist. With only a
few signal channels, and initially large statistical and systematic errors, it
is very likely that an mSUGRA interpretation will look all right even if it is
not. We present an approach to studying any potential signals of new physics in
``inclusive signature space'' that sensitively tests any proposed
interpretation, and apply it to the mSUGRA case. The approach also has
significant experimental advantages, reducing the sensitivity to jet energy
corrections, dependence on beam luminosity, and other systematics. Basically,
if one (or more) instances of reported data lies outside certain bounded
regions of inclusive signature space characteristic of the physics being
tested, that physics is excluded for any parameters. The approach can be used
to study supersymmetry breaking and to point to the form of the underlying
theory even without detailed measurements of a number of important parameters
which will be difficult or impossible to measure at hadron colliders.


title: Is the beta phase maximal ?

abstract:
  The current experimental determination of the absolute values of the CKM
elements indicates that 2|Vub / Vcb/ Vus| = (1-z) with z given by z = 0.19 +(-)
0.14. This fact implies that irrespective of the form of the quark Yukawa
matrices, the measured value of the SM CP phase beta is approximately the
maximum allowed by the measured absolute values of the CKM elements. This is
beta = pi/6 - z/sqrt{3} for gamma = pi/3 + z/sqrt{3}, which implies alpha =
pi/2. Alternatively, assuming that beta is exactly maximal and using the
experimental measurement, sin(2beta) = 0.726 +(-) 0.037, the phase gamma is
predicted to be gamma = pi/2 - beta = 66.3 +(-) 1.7. The maximality of beta, if
confirmed by the near-future experiments, may give us some clues as to the
origin of CP violation.


title: Neutrino Mass Textures with Maximal CP Violation

abstract:
  We have found three types of neutrino mass textures, which give maximal
CP-violation as well as maximal atmospheric neutrino mixing. These textures are
described by six real mass parameters: one specified by two complex flavor
neutrino masses and two constrained ones and the others specified by three
complex flavor neutrino masses. In each texture, we calculate mixing angles and
masses as well as Majorana CP phases.


title: New Physics in b --> s bar(s) s Decay

abstract:
  We perform a model-independent analysis of the data on branching ratios and
CP asymmetries of $B\to\phi K$ and $B\to\eta^{(')} K^{(*)}$ modes. The present
data is encouraging to look for indirect evidences of physics beyond the
Standard Model. We investigate the parameter spaces for different possible
Lorentz structures of the new physics four-Fermi interaction. It is shown that
if one takes the data at $1\sigma$ confidence level, only one particular
Lorentz structure is allowed. Possible consequences for the $B_s$ system are
also discussed.


title: Dynamical screening in a quark gluon plasma

abstract:
  We calculate the screening potential of a fast parton moving through a
quark-gluon plasma in the framework of semi-classical transport theory. We
found an anisotropic potential showing a minimum in the direction of the parton
velocity. Possible consequences of this potential on binary states in a
quark-gluon plasma are discussed.


title:
Spin densities in the transverse plane and generalized transversity
  distributions

abstract:
  We show how generalized quark distributions in the nucleon describe the
density of polarized quarks in the impact parameter plane, both for
longitudinal and transverse polarization of the quark and the nucleon. This
density representation entails positivity bounds including chiral-odd
distributions, which tighten the known bounds in the chiral-even sector. Using
the quark equations of motion, we derive relations between the moments of
chiral-odd generalized parton distributions of twist two and twist three. We
exhibit the analogy between polarized quark distributions in impact parameter
space and transverse momentum dependent distribution functions.


title:
Theoretical Status of the $B_{c}$ Meson in the Shifted l-Expansion
  Technique

abstract:
  In the framework of phenomenological static and QCD-motivated model
potentials for heavy quarkonium, we compute the $\bar{b}c$ mass spectrum as
well as its $\QTR{rm}{1S}$ hyperfine splitting using the recently introduced
shifted $l$- expansion technique. We also predict the leptonic constant \
$f_{B_{c}}$ of the lightest pseudoscalar $B_{c}$ and $f_{B_{c}^{\ast}}$ of the
vector $B_{c}^{\ast}$ states taking into account the one-loop and two-loop QCD
corrections. Further, we use the scaling relation to predict the leptonic
constant of the R{rm}{nS}$-states of the $\bar{b}c$ system. For the sake of
comparison, we use the same fitting parameters of our previous model
potentials. From our results we conclude that shifted $l$-expansion method has
the same accuracy, convergence and status as our previous work.


title:
Color superconductivity vs. pseudoscalar condensation in a three-flavor
  NJL model

abstract:
  We calculate numerically the phase diagram of the three-flavor
Nambu-Jona-Lasinio model at zero and finite temperature as a function of the
up, down, and strange quark chemical potentials. We focus on the competition
between pseudoscalar condensation and color superconductivity. We find that the
two types of phases are separated by first-order transitions.


title:
Angular analysis of B decaying into J/psi Tensor, J/psi Vector and J/psi
  Scalar

abstract:
  The analysis of $B \to \jpsi K^{\star}_{2}(1430)$ decay mode is complicated
by the fact that close to the $J^{PC}=2^{++}$ meson $\Kstart(1430)$, there lie
other $J^{PC}=1^{--}$ and $J^{PC}=0^{++}$ resonances, $K^{\star}(1410)$ and
$K^{\star}_{0}(1430)$ respectively. We show how an angular analysis can be used
to isolate the contributions from the different resonances and partial waves
contributing to the final state $B\to \jpsi K_X$, where $K_X$ could be any of
the resonance $K^{\star}_{2}(1430)$, $K^{\star}(1410)$ or
$K^{\star}_{0}(1430)$. For this purpose we study the time integrated
differential decay rate. We also construct a time dependent angular asymmetry
that enables a clean measurement of the mixing phase $\beta$ in the mode $B\to
\jpsi \Kstart(1430)$ alone, without contributions from the decay modes
$B\to\jpsi\Kstarsz(1430)$ or $B\to\jpsi\Kstar(1410)$.


title: Quark confinement and curved spaces

abstract:
  In this work it will be shown how quark confinement appears when wave
equations derived in curved spaces are considered. First, the equations and
their solutions for Coulomb-like potentials will be presented, and then, how
this theory leads to quark confinement. A comparison between different models
of confinement will be also made.


title: The leading two loop counterterm in the nonleptonic weak sector of CHPT

abstract:
  We calculate the leading divergences at NNLO for the octet part of the
nonleptonic weak sector of chiral perturbation theory, using renormalization
group methods. The role of counterterms which vanish at the equation of motion
and their use to simplify the calculation is shown explicitly. The obtained
countertem Lagrangian can be employed to calculate the chiral double log
contributions of quantities in this sector, most notably the K --> pi pi
amplitude. The double log contribution of the latter is discussed in a separate
paper.


title: Hybrid Seesaw Neutrino Masses with A_4 Family Symmetry

abstract:
  We consider the scenario in which neutrino data are explained by the
interplay of type I and II seesaw terms in the Majorana neutrino mass matrix
${\cal M}_\nu = {\cal M}_L - {\cal M}_D {\cal M}_R^{-1} {\cal M}_D^T$. We
construct a predictive model with ${\cal M}_L$ proportional to the unit matrix,
3 diagonal texture zeros in ${\cal M}_R$, and ${\cal M}_D$ diagonal. We show
how this pattern can be maintained by the non-Abelian discrete symmetry $A_4$,
and discuss its phenomenological consequences. It turns out that the two types
of seesaw give contributions of the same order to ${\cal M}_\nu$. In the CP
conserving case, we find $\sin\theta_{13}\approx 2/(\tan 2\theta_{23} \tan
2\theta_{12})$ and we predict inverted (normal) ordering of the mass spectrum
for $\tan^2\theta_{12} < 0.5 ~(>0.5)$.


title: Effective Hamiltonian for QCD evolution at high energy

abstract:
  We construct the effective Hamiltonian which governs the renormalization
group flow of the gluon distribution with increasing energy and in the leading
logarithmic approximation. This Hamiltonian defines a two-dimensional field
theory which involves two types of Wilson lines: longitudinal Wilson lines
which describe gluon recombination (or merging) and temporal Wilson lines which
account for gluon bremsstrahlung (or splitting). The Hamiltonian is self-dual,
i.e., it is invariant under the exchange of the two types of Wilson lines. In
the high density regime where one can neglect gluon number fluctuations, the
general Hamiltonian reduces to that for the JIMWLK evolution. In the dilute
regime where gluon recombination becomes unimportant, it reduces to the dual
partner of the JIMWLK Hamiltonian, which describes bremsstrahlung.


title: CP Violation in Production and Decay of Supersymmetric Particles

abstract:
  In this thesis we analyze CP violating effects of MSSM phases in production
and two-body decays of neutralinos, charginos and sfermions. For different
supersymmetric processes we define and calculate CP-odd asymmetries, which base
on triple products. We present numerical results for electron-positron
collisions at a future linear collider with a center of mass energy of 500-800
GeV, high luminosity and longitudinally polarized beams.


title: Azimuthal asymmetry in unpolarized $\pi N$ Drell-Yan process

abstract:
  Taking into account the effect of final state interaction, we calculate the
non-zero (na\"{i}ve) $T$-odd transverse momentum dependent distribution
$h_1^{\perp}(x,\kp^2)$ of the pion in a quark-spectator-antiquark model with
effective pion-quark-antiquark coupling as a dipole form factor. Using the
model result we estimate the $\cos 2\phi$ asymmetries in the unpolarized $\pi^-
N$ Drell-Yan process which can be expressed as
$h_1^{\perp}\times\bar{h}_1^{\perp}$. We find that the resulting
$h_{1\pi}^\p(x,\kp^2)$ has the advantage to reproduce the asymmetry that agrees
with the experimental data measured by NA10 Collaboration. We estimate the
$\cos2\phi$ asymmetries averaged over the kinematics of NA10 experiments for
140, 194 and 286 GeV $\pi^-$ beam and compare them with relevant experimental
data.


title:
Random magnetic fields inducing solar neutrino spin-flavor precession in
  a three generation context

abstract:
  We study the effect of random magnetic fields in the spin-flavor precession
of solar neutrinos in a three generation context, when a non-vanishing
transition magnetic moment is assumed. While this kind of precession is
strongly constrained when the magnetic moment involves the first family, such
constraints do not apply if we suppose a transition magnetic moment between the
second and third families. In this scenario we can have a large non-electron
anti-neutrino flux arriving on Earth, which can lead to some interesting
phenomenological consequences, as, for instance, the suppression of day-night
asymmetry. We have analyzed the high energy solar neutrino data and the KamLAND
experiment to constrain the solar mixing angle, and solar mass difference, and
we have found a larger shift of allowed values.


title: In Search of Lonely Top Quarks at the Tevatron

abstract:
  Single top-quark production, via weak-interaction processes, is an important
test of the standard model, potentially sensitive to new physics. However, this
measurement is much more challenging at the Tevatron than originally expected.
We reexamine this process and suggest new methods, using shape variables, that
can supplement the methods that have been discussed previously.


title:
Polarization, CP Asymmetry and Branching ratios in B \to K^* K^* with
  Perturbative QCD approach

abstract:
  We study the charmless rare decays $B \to K^{\ast} K^{\ast}$ within the
Perturbative QCD picture. We calculate not only factorizable and
non-factorizable diagrams, but also annihilation ones. Our predictions are the
following: The longitudinal polarization fraction vary from 75% to 99%
depending on channels, the branching ratios are of order $10^{-7}$ for
$B^0(\bar{B}^0) \to K^{\ast0}\bar{K}^{\ast0}$ and $B^{\pm} \to K^{\ast\pm}
\bar{K}^{\ast0}(K^{\ast0})$, much bigger than that for $B^0(\bar{B}^0) \to
K^{\ast+}K^{\ast-}$($10^{-8}$). The direct CP asymmetry in $B^{\pm} \to
K^{\ast\pm} \bar{K}^{\ast0}(K^{\ast0})$ and $B^0(\bar{B}^0) \to
K^{\ast+}K^{\ast-}$ is about -15% and -65% if we choose $\alpha (\phi_2)$ as
$95^{\circ}$. There's no direct CPV in $B^0(\bar{B}^0) \to
K^{\ast0}\bar{K}^{\ast0}$ decays because of the pure $b \to d$ penguin
topology. Our predictions will be tested in the future B experiments.


title:
Full One-Loop Electroweak Corrections to the Charged Higgs Decays into a
  Chargino and Neutralino in the MSSM

abstract:
  We calculate the full one-loop electroweak (FEW) corrections to
$H^-\to\widetilde{\chi}^-_1\widetilde{\chi}^0_i$ in the minimal supersymmetric
standard model (MSSM), and compare with the leading order (LO) corrections
including the loops of the (s)quarks only in the third generation and the
complete leading order (CLO) corrections including the loops of the (s)quarks
in all the three generations. We find that the magnitudes of the FEW
corrections can be larger than 10% for $\tan\beta>30$. Moreover, comparing with
the FEW corrections, both of the LO and the CLO corrections are negligible
small for the mode 1($H^-\to\widetilde{\chi}^-_1\widetilde{\chi}^0_1$) when
$\tan\beta<5$, and for the mode
2($H^-\to\widetilde{\chi}^-_1\widetilde{\chi}^0_2$) when $\tan\beta>45$,
respectively, since there are not enhancements from the Yukawa couplings. We
also calculate the FEW corrections in the minimal supergravity (mSUGRA)
scenario, where the FEW corrections can be larger than the LO and the CLO
corrections by more than 60% and 50%, respectively.


title:
Polarization effects for pair creation by photon in oriented crystals at
  high energy

abstract:
  Pair creation by a photon in an oriented crystal is considered in a frame of
the quasiclassical operator method, which includes processes with polarized
particles. Under some quite generic assumptions the general expression is
derived for the probability of pair creation of longitudinally polarized
electron (positron) by circularly polarized photon in oriented crystal. In
particular cases $\vartheta_0 \ll V_0/m$ and $\vartheta_0 \gg V_0/m$
($\vartheta_0$ is the angle of incidence, angle between the momentum of initial
photon and axis (plane) of crystal, $V_0$ is the scale of a potential of axis
or a plane relative to which the angle $\vartheta_0$ is defined) one has
constant field approximation and the coherent pair production theory
correspondingly. Side by side with coherent process the probability of
incoherent pair creation is calculated, which differs essentially from
amorphous one. At high energy the pair creation in oriented crystals is
strongly enhanced comparing with amorphous medium. In appendixes the integral
polarization of positron is found in external field and for coherent and
incoherent mechanisms.


title:
Two-Loop QCD Corrections to the Heavy Quark Form Factors: Anomaly
  Contributions

abstract:
  We present closed analytic expressions for the order $\alpha_s^2$ triangle
diagram contributions to the matrix elements of the singlet and non-singlet
axial vector currents between the vacuum and a quark-antiquark state. We have
calculated these vertex functions for arbitrary momentum transfer and for four
different sets of internal and external quark masses. We show that both the
singlet and non-singlet vertex functions satisfy the correct chiral Ward
identities. Using the exact expressions for the finite axial vector form
factors, we check the quality and the convergence of expansions at production
threshold and for asymptotic energies.


title:
Lowest order QED radiative corrections to longitudinally polarized
  Moller scattering

abstract:
  The total lowest-order electromagnetic radiative corrections to the
observables in Moller scattering of longitudinally polarized electrons have
been calculated. The final expressions obtained by the covariant method for the
infrared divergency cancellation are free from any unphysical cut-off
parameters. Since the calculation is carried out within the ultrarelativistic
approximation our result has a compact form that is convenient for computing.
Basing on these expressions the FORTRAN code MERA has been developed. Using
this code the detailed numerical analysis performed under SLAC (E-158) and JLab
kinematic conditions has shown that the radiative corrections are significant
and rather sensitive to the value of the missing mass (inelasticity) cuts.


title: Crossing Heavy-Flavour Thresholds in Fragmentation Functions

abstract:
  In analogy with parton distribution functions, also parton fragmentation
functions obey matching conditions when crossing heavy-flavour thresholds. We
compute these matching conditions at next-to-leading order in the strong
coupling constant alpha_s in the MSbar scheme. Our results can be used for the
dynamical generation of the heavy-flavour component in next-to-leading order
fits to light-hadrons fragmentation functions. Furthermore, when computing
perturbatively the charm fragmentation function from first principles and
evolving it to higher scales, our matching conditions should be used for
consistency when crossing the bottom threshold.


title: Signatures of new Physics in dileptonic B-decays

abstract:
  Leptonic decays of $B$-mesons are theoretically very clean probes for testing
the Standard Model (SM) and possible physics beyond it. Amongst the various
leptonic decays of the $B$-meson, the pure dileptonic decay $B \to \ell^+
\ell^-$ is very important as this mode is helicity suppressed in the SM but can
be substantially enhanced in some of the models beyond the SM, such as
supersymmetric (SUSY) theories and the two Higgs doublet model (2HDM). Although
the purely dileptonic decay mode is helicity suppressed in the SM its
associated mode $B \to \ell^+ \ell^- \gamma$ does not have the same
suppression, due to the presence of the $\gamma$ in the final state. In this
paper we will also analyse the effects of enhanced $Z$-penguins on these two
decay modes.


title: Three-Loop Mixing of Dipole Operators

abstract:
  We calculate the complete three-loop O(alpha_s^3) anomalous dimension matrix
for the dimension-five dipole operators that arise in the Standard Model after
integrating out the top quark and the heavy electroweak bosons. Our computation
completes the three-loop anomalous dimension matrix of operators that govern
low-energy |Delta F| = 1 flavor-changing processes, and represents an important
ingredient of the next-to-next-to-leading order QCD analysis of the Bbar -> X_s
gamma decay.


title: Infrared enhanced analytic coupling and chiral symmetry breaking in QCD

abstract:
  We study the impact on chiral symmetry breaking of a recently developed model
for the QCD analytic invariant charge. This charge contains no adjustable
parameters, other than the QCD mass scale $\Lambda$, and embodies asymptotic
freedom and infrared enhancement into a single expression. Its incorporation
into the standard form of the quark gap equation gives rise to solutions for
the dynamically generated mass that display a singular confining behaviour at
the origin. Using the Pagels-Stokar method we relate the obtained solutions to
the pion decay constant $f_{\pi}$, and estimate the scale parameter $\Lambda$,
in the presence of four active quarks, to be about 880 MeV.


title: On the Interpretation of B_s to mu^+ mu^- in the CMSSM

abstract:
  We discuss the interpretation of present and possible future experimental
constraints on B_s to mu^+ mu^- decay in the context of the constrained minimal
extension of the Standard Model (CMSSM) with universal scalar masses. We
emphasize the importance of including theoretical and other experimental
uncertainties in calculating the likelihood function, which can affect
significantly the inferred 95% confidence-level limit on the CMSSM parameters.
The principal uncertainties are the B_s meson decay constant, m_t and m_b. The
latter induce uncertainties in the mass of the charged Higgs boson that
dominates the B_s to mu^+ mu^- decay amplitude at large tan beta, reducing the
CMSSM region excluded by present and possible future limits from the Fermilab
Tevatron collider and the LHC.


title: The ${\bar c} c$ purity of $\psi(3770)$ and $\psi'$ challenged

abstract:
  It is suggested that the resonance $\psi(3770)$ may contain a sizeable
($O(10%)$ in terms of the probability weight factor) four-quark component with
the up- and down- quarks and antiquarks in addition to the $c {\bar c}$ pair,
which component in itself has a substantial part with the isospin I=1.
Furthermore such four-quark part of the wave function should also affect the
properties of the $\psi'$ charmonium resonance through the $\psi(3770) - \psi'$
mixing previously considered in the literature. It is argued that an admixture
of extra light quark pairs can explain a possible discrepancy between the
theoretical expectations and the recent data on the non-$D {\bar D}$ decay
width of the $\psi(3770)$ and the ratio of the yield of charged and neutral $D$
meson pairs in its decays, as well as on the extra rate of the $\psi'$ direct
decay into light hadrons and the rate of the decay $\psi' \to \pi^0 J/\psi$. It
is further argued that the suggested four-quark component of the wave function
of the $\psi(3770)$ should give rise to a measurable rate of the decays
$\psi(3770) \to \eta J/\psi$ and $\psi(3770) \to \pi^0 J/\psi$.


title: Sterile Neutrinos and Global Symmetries

abstract:
  We use an effective-field-theory approach to construct models with naturally
light sterile neutrinos, due to either exact or accidental global symmetries.
The most attractive models we find are based on gauge symmetries, either
discrete or continuous. We give examples of simple models based on Z_N, U(1)',
and SU(2)'.


title: Threshold scans in Central Diffraction at the LHC

abstract:
  We propose a new set of measurements which can be performed at the LHC using
roman pot detectors. The method exploits excitation curves in central
diffractive pair production, and is illustrated using the examples of the W
boson and top quark mass measurements. Further applications are mentioned.


title: SU(3) Baryon Resonance Multiplets in Large N_c QCD

abstract:
  We extend the recently developed treatment of baryon resonances in large N_c
QCD to describe resonance multiplets collected according to the SU(3) flavor
symmetry that includes strange quarks. As an illustration we enumerate the
SU(3) partners of a hypothetical J^P = 1/2^{+/-} resonance in the SU(3)
representation that reduces to 10-bar when N_c = 3, and reproduce results
hitherto obtained only in the context of a large N_c quark picture. While these
specific quantum numbers represent one favored set for the possible pentaquark
state Theta^+ (1540), the method is applicable to baryon resonances with any
quantum numbers.


title:
Constraints on the I=1 hadronic tau decay and e^+e^- --> hadrons data
  sets and implications for (g-2)_mu

abstract:
  Sum rule tests are performed on the spectral data for (i) flavor 'ud' vector-
current-induced hadronic tau decays and (ii) e^+ e^- hadroproduction, in the
region below s~3-4 GeV^2, where discrepancies exist between the isospin-
breaking-corrected charged and neutral current I=1 spectral functions. The tau
data is found to be compatible with expectations based on high-scale
alpha_s(M_Z) determinations, while the electroproduction data displays two
problems. The results favor determinations of the leading order hadronic
contribution to (g-2)_mu which incorporate hadronic tau decay data over those
employing electroproduction data only, and hence a reduced discrepancy between
experiment and the Standard Model prediction for (g-2)_mu.


title: Evading Astrophysical Constraints on Axion-Like Particles

abstract:
  Stellar energy loss arguments lead to strong constraints on the coupling
$\phi \gamma \gamma$ of a light axion-like particle to two photons.
Helioscopes, like CAST, are able to put competitive bounds. The PVLAS
experiment has recently observed a rotation of the polarization of a laser
propagating in a magnetic field that can be interpreted as the effect of a
quite strong $\phi \gamma \gamma$ coupling. We present scenarios where the
astrophysical and CAST bounds can be evaded, and we show that the PVLAS result
can be accomodated in one of the models, provided the new physics scale is at
very low energies.


title:
Gravireggeons and transplanckian scattering in models with one extra
  dimension

abstract:
  The inelastic scattering of the brane fields induced by $t$-channel
gravireggeons exchanges in the RS model with a small curvature $\kappa$ is
considered, and the imaginary part of the eikonal is analytically calculated.
It is demonstrated that the results can be obtained from the corresponding
formulae previously derived in the ADD model with one extra dimension of the
size $R_c$ by formal replacement $R_c \to (\pi \kappa)^{-1}$. The inelastic
cross section for the scattering of ultra-high neutrino off the nucleon is
numerically estimated for the case $\kappa \ll \bar{M}_5 \sim 1$ TeV, where
$\bar{M}_5$ is a reduced Planck scale in five warped dimensions.


title: Mixing the Strong and E-W Higgs Sectors

abstract:
  After noting the well known similarity of the minimal electro-weak Higgs
sector with the linear sigma model for the pion and the sigma, it is found that
a small mixing term between the two models generates a pion mass. Although the
custodial SU(2)L x SU(2)R, and the gauged SU(2)L x U(1) symmetry for the whole
model remains intact, the mixing breaks the relative chiral symmetry between
the two sectors. The mixing should be calculable from light quark masses as a
quantum correction. This simple mechanism of "relative symmetry breaking" is
believed to have applications for other forms of symmetry breaking.


title:
Non-Markovian Monte Carlo Algorithm for the Constrained Markovian
  Evolution in QCD

abstract:
  We revisit the challenging problem of finding an efficient Monte Carlo (MC)
algorithm solving the constrained evolution equations for the initial-state QCD
radiation. The type of the parton (quark, gluon) and the energy fraction x of
the parton exiting emission chain (entering hard process) are predefined, i.e.
constrained throughout the evolution. Such a constraint is mandatory for any
realistic MC for the initial state QCD parton shower. We add one important
condition: the MC algorithm must not require the a priori knowledge of the full
numerical exact solutions of the evolution equations, as is the case in the
popular ``Markovian MC for backward evolution''. Our aim is to find at least
one solution of this problem that would function in practice. Finding such a
solution seems to be definitely within the reach of the currently available
computer CPUs and the sophistication of the modern MC techniques. We describe
in this work the first example of an efficient solution of this kind. Its
numerical implementation is still restricted to the pure gluon-strahlung. As
expected, it is not in the class of the so-called Markovian MCs. For this
reason we refer to it as belonging to a class of non-Markovian MCs. We show
that numerical results of our new MC algorithm agree very well (to 0.2%) with
the results of the other MC program of our own (unconstrained Markovian) and
another non-MC program QCDnum16. This provides a proof of the existence of the
new class of MC techniques, to be exploited in the precision perturbative QCD
calculations for the Large Hadron Collider.


title:
The decays $\bar{B} \to D^{**}\pi$ and the Isgur-Wise functions
  $\tau_{1/2}(w)$, $\tau_{3/2}(w)$

abstract:
  We perform a phenomenological analysis of the decays $B \to D^{**}\pi$, where
$D^{**}$ is a $P$-wave excited meson with total angular momentum $j = {1 \over
2}$ or ${3 \over 2}$ for the light cloud, recently measured by the Belle
Collaboration in the modes $\bar{B}^0\to D^{**+}\pi^-$ (Class I) and $B^- \to
D^{**0}\pi^-$ (Class III). Making the reasonable assumption of naive
factorization, that we test in $B \to D(D^*)\pi$ decays, Class I decays allow
to extract the Isgur-Wise form factors $\tau_{1/2}(w)$, $\tau_{3/2}(w)$ at $w
\cong w_{max}$ ($q^2 \cong 0$). We obtain $\tau_{1/2}(w_{max}) < 0.20$,
$\tau_{3/2}(w_{max}) = 0.31 \pm 0.12$. We discuss the question of the $w$
dependence of these IW functions. We find agreement with the Bakamjian-Thomas
quark model of form factors and, extrapolating at $w=1$, with Bjorken and
Uraltsev sum rules. We discuss also Class III decays, where the $D^{**0}$ $(j =
{1 \over 2})$ emission diagram contributes. We extract the corresponding
$f_{D_{1/2}}$ decay constant, that is in agreement with theoretical estimates
at finite mass. Finally, we must warn that $1/m_Q$ corrections could be large
and upset the results of the present stage of this analysis. On the other hand,
we confront present data on the semileptonic rate of $B$ mesons to excited
states with theoretical expectations.


title:
Excitation Function of the Longitudinal Expansion in Central Nuclear
  Collisions

abstract:
  Longitudinal hadron spectra from Proton-Proton (pp) and nucleus-nucleus (AA)
collisions from $E_{lab}= 2$ AGeV to $\sqrt s=200$ AGeV are investigated. The
widths of the rapidity spectra for various particle species increases
monotonously with energy. The present calculation indicates no sign of a step
like behaviour as excepted from the Kaon transverse mass systematics. For
Pions, the transport simulation is consistent with a Landau type scaling of the
rapidity widths, both in central AA reactions and in pp collisions. However,
other hadron species do not follow the Landau scaling. The present model
predicts a decreasing rapidity width with particle mass for newly produced
particles, not supporting a Landau type flow interpretation.


title: Tau neutrino propagation and tau energy loss

abstract:
  Electromagnetic energy loss of tau leptons is an important ingredient for
eventual tau neutrino detection from high energy astrophysical sources.
Proposals have been made to use mountains as neutrino converters, in which the
emerging tau decays in an air shower. We use a stochastic evaluation of both
tau neutrino conversion to taus and of tau electromagnetic energy loss. We
examine the effects of the propagation for mono-energetic incident tau
neutrinos as well as for several neutrino power-law spectra. Our main result is
a parameterization of the tau electromagnetic energy loss parameter beta. We
compare our analytic expression for the tau flux using this beta with other
parameterizations of beta.


title: A Precision Model Independent Determination of |Vub| from B -> pi e nu

abstract:
  A precision method for determining |Vub| using the full range in q^2 of B->
pi \ell nu data is presented. At large q^2 the form factor is taken from
unquenched lattice QCD, at q^2=0 we impose a model independent constraint
obtained from B-> pi pi using the soft-collinear effective theory, and the
shape is constrained using QCD dispersion relations. We find |Vub| =(3.54\pm
0.17\pm 0.44) x 10^{-3}. With 5% experimental error and 12% theory error, this
is competitive with inclusive methods. Theory error is dominated by the input
points, with negligible uncertainty from the dispersion relations.


title: Limits on Split Supersymmetry from Gluino Cosmology

abstract:
  An upper limit on the masses of scalar superpartners in split supersymmetry
is found by considering cosmological constraints on long-lived gluinos. Over
most of parameter space, the most stringent constraint comes from big bang
nucleosynthesis. A TeV mass gluino must have a lifetime of less than 100
seconds to avoid altering the abundances of D and Li-6. This sets an upper
limit on the supersymmetry breaking scale of 10^9 GeV.


title: Fermion Masses and Mixing in Four and More Dimensions

abstract:
  We give an overview of recent progress in the study of fermion mass and
flavor mixing phenomena. Mass matrix ansatze are considered within the SM and
SUSY GUTs where some predictive frameworks based on SU(5) and SO(10) are
reviewed. We describe a variety of schemes to construct quark mass matrices in
extra dimensions focusing on four major classes: models with the SM residing on
3-brane, models with universal extra dimensions, models with split fermions and
models with warped extra dimensions. We outline how realistic patterns of quark
mass matrices could be derived from orbifold models in heterotic superstring
theory. Finally, we address the fermion mass problem in intersecting D-branes
scenarios, and present models with D6-branes able to give a good quantitatively
description of quark masses and mixing. The role of flavor/CP violation problem
as a probe of new physics is emphasized.


title: \mu-\tau Symmetry and Maximal CP Violation

abstract:
  We argue the possibility that a real part of a flavor neutrino mass matrix
only respects a mu-tau symmetry. This possibility is shown to be extended to
more general case with a phase parameter \theta, where the mu-tau symmetric
part has a phase of \theta/2. This texture shows maximal CP violation and no
Majorana CP violation.


title:
Exclusive (B -> rho l^+ l^-) decay and Polarized lepton pair
  forward--backward asymmetries

abstract:
  The polarized lepton pair forward-backward asymmetries in (B -> rho l^+ l^-)
decay using a general, model independent form of the effective Hamiltonian is
studied. The general expression for nine double-polarization forward-backward
asymmetries are calculated. The study of the forward-backward asymmetries of
the doubly-polarized lepton pair proves to be very useful tool in looking for
new physics beyond the standard model.


title:
Testing saturation with diffractive jet production in deep inelastic
  scattering

abstract:
  We analyse the dissociation of a photon in diffractive deep inelastic
scattering in the kinematic regime where the diffractive mass is much bigger
than the photon virtuality. We consider the dominant q\bar{q}g component
keeping track of the transverse momentum of the gluon which can be measured as
a final-state jet. We show that the diffractive gluon-jet production
cross-section is strongly sensitive to unitarity constraints. In particular, in
a model with parton saturation, this cross-section is sensitive to the scale at
which unitarity effects become important, the saturation scale. We argue that
the measurement of diffractive jets at HERA in the limit of high diffractive
mass can provide useful information on the saturation regime of QCD.


title: Some Tests on CPT Invariance

abstract:
  We first briefly review tests on CPT invariance based on the consequences of
the CPT theorem and then present some possible CPT tests due to exotic models
in which some of the CPT conditions are lost, such as those without
hermiticity.


title:
Discovery potential for a charged Higgs boson decaying in the
  chargino-neutralino channel of the ATLAS detector at the LHC

abstract:
  We have investigated charged Higgs boson production via the gluon-bottom
quark mode, gb -> tH+, followed by its decay into a chargino and a neutralino.
The calculations are based on masses and couplings given by the Minimal
Supersymmetric Standard Model (MSSM) for a specific choice of MSSM parameters.
The signature of the signal is characterized by three hard leptons, a
substantial missing transverse energy due to the decay of the neutralino and
the chargino and three hard jets from the hadronic decay of the top quark. The
possibility of detecting the signal over the Standard Model (SM) and non-SM
backgrounds was studied for a set of tanBeta and mA. The existence of 5-sigma
confidence level regions for H+ discovery at integrated luminosities of 100
fb-1 and 300 fb-1 is demonstrated, which cover also the intermediate region 4 <
tanBeta < 10 where H+ decays to SM particles cannot be used for H+ discovery.


title: Factorization and Resummation in Soft-Collinear Effective Theory

abstract:
  We review soft-collinear effective theory (SCET), and apply it to discuss
quark electromagnetic form factor, then present the resumed transverse momentum
distribution of Higgs-boson production via gluon fusion under this framework,
where we derive a relatively full differential formula in transverse momentum
$Q_T$ space like one which have been obtained by Dokshitzer-D'Yanov-Troyan
(DDT) in perturbative Quantum Chromodynamics (pQCD). Furthermore, our above
result can be generalized to even higher order. Comparing our formula with the
integral formula of Collins-Soper-Sterman (CSS) in impact parameter $b$ space,
we establish the relationship between the anomalous dimension of operator
together with matching coefficients in SCET and the well-known coefficients A,
B and C in pQCD, which also provides a relative natural and convenient method
to treat the similar questions as ones of CSS, such as the matching in
nonperturbative region. Finally, the joint resummation method in SCET is
briefly discussed.


title:
Mesons and diquarks in the color neutral 2SC phase of dense cold quark
  matter

abstract:
  The spectrum of meson and diquark excitations of dense color neutral cold
quark matter is investigated in the framework of a 2-flavored
Nambu--Jona-Lasinio type model, including a quark $\mu$- and color $\mu_8$
chemical potential. It was found out that in the color superconducting (2SC)
phase, i.e. at $\mu>\mu_c=342$ MeV, $\mu_8$ aquires rather small values $\sim$
10 MeV in order to ensure the color neutrality. In this phase the $\pi$- and
$\sigma$ meson masses are evaluated around $\sim$ 330 MeV. The spectrum of
scalar diquarks in the color neutral 2SC phase consists of a heavy ($\rm
SU_c(2)$-singlet) resonance with mass $\sim$ 1100 MeV, four light diquarks with
mass $3|\mu_8|$, and one Nambu --Goldstone boson which is in accordance with
the Goldstone theorem. Moreover, in the 2SC phase there are five light stable
particles as well as a heavy resonance in the spectrum of pseudo-scalar
diquarks. In the color symmetric phase, i.e. for $\mu <\mu_c$, a mass splitting
of scalar diquarks and antidiquarks is shown to arise if $\mu\ne 0$, contrary
to the case of $\mu = 0$, where the masses of scalar antidiquarks and diquarks
are degenerate at the value $\sim$~700 MeV. If the coupling strength in the
pseudo-scalar diquark channel is the same as in the scalar diquark one (as for
QCD-inspired NJL models), then in the color symmetric phase pseudo-scalar
diquarks are not allowed to exist as stable particles.


title:
The Light-Front Zero-Mode Contribution to the Good Current in Weak
  Transition

abstract:
  We examine the light-front zero-mode contribution to the good(+) current
matrix elements between pseudoscalar and vector mesons. In particular, we
discuss the transition form factor $f(q^2)$ which has been suspected to have
the light-front zero-mode contribution. While the zero-mode contribution in
principle depends on the form of the vector meson vertex $\Gamma^\mu=\gamma^\mu
- (P_V -2k)^\mu/D$, the form factor $f(q^2)$ is found to be free from the
zero-mode contribution if the denominator $D$ contains the term proportional to
the light-front energy $(k^-)^{n}$ with the power $n>0$. The lack of zero-mode
contribution benefits the light-front quark model phenomenology. We present our
numerical calculations for the $B\to\rho$ transition.


title:
The Large Higgs Energy Region in Higgs Associated Top Pair Production at
  the Linear Collider

abstract:
  The process e^+ e^- to t \bar t H is considered in the kinematic end point
region where the Higgs energy is close to its maximal energy. In perturbative
QCD, using the loop expansion, the amplitudes are plagued by Coulomb
singularities that need to be resummed. We show that the QCD dynamics in this
end point region is governed by nonrelativistic heavy quarkonium dynamics, and
we use a nonrelativistic effective theory to compute the Higgs energy
distribution at leading and next-to-leading logarithmic approximation in the
nonrelativistic expansion. Updated numbers for the total cross section
including the summations in the Higgs energy end point region are presented.


title: LHC physics: the first one--two year(s)

abstract:
  We discuss the strategy to commission the LHC experiments and understand
standard physics at sqrt{s}=14TeV before data taking starts and in the early
phases of the LHC operation. In particular, we review the various steps needed
to understand and calibrate the ATLAS and CMS detectors, from construction
quality checks, to beam tests, to cosmics runs, to first collisions. We also
review the preparation and tuning of Monte Carlo tools, and present a few
examples of physics goals for integrated luminosities of up to a few inverse
fb.


title: Electroweak Baryogenesis with dimension-6 Higgs interactions

abstract:
  We present the computation of the baryon asymmetry in the SM amplified by
dimension-6 Higgs interactions using the WKB approximation. Analyzing the
one-loop potential it turns out that the phase transition is strongly first
order in a wide range of the parameters. It is ensured not to wash out the net
baryon number gained previously even for Higgs masses up to at least 170 GeV.
In addition dimension-6 operators induce new sources of CP violation. Novel
source terms which enhance the generated baryon asymmetry emerge in the
transport equations. This model predicts a baryon to entropy ratio close to the
observed value for a large part of the parameter space.


title:
A new method for calculation of traces of Dirac $\gamma$-matrices in
  Minkowski space

abstract:
  This paper presents some relations for orthonormal bases in the Minkowski
space and isotropic tetrads constructed from the vectors of these bases. As an
example of an application of the obtained formulae, in particular recursion
relations, a new method is proposed to calculate traces of Dirac
$\gamma$-matrices in the Minkowski space. Compared to the classical algorithms,
the new method results in more compact expressions for the traces.
Specifically, it may be easily implemented as a simple yet efficient computer
algorithm.


title: A Fat Higgs with a Fat Top

abstract:
  A new variant of the supersymmetric Fat Higgs model is presented in which the
MSSM Higgses as well as the top quark are composite. The underlying theory is
an s-confining SU(3) gauge theory with the MSSM gauge groups realized as gauged
sub-groups of the chiral flavor symmetries. This motivates the large Yukawas
necessary for the large top mass and SM-like Higgs of mass>>M_Z in a natural
way as the residual of the strong dynamics responsible for the composites. This
removes fine-tuning associated with these couplings present in the original Fat
Higgs and New Fat Higgs models, respectively.


title:
Cosmological Production of Vector Bosons and Cosmic Microwave Background
  Radiation

abstract:
  The intensive cosmological creation of vector W, Z- bosons in the
cosmological model with the relative units is considered. Field theoretical
models are studied, which predict that the CMB radiation and the baryon matter
in the universe can be products of decay and annihilation processes of these
primordial bosons.


title: Quarkonium formation in statistical and kinetic models

abstract:
  I review the present status of two related models addressing scenarios in
which the formation of heavy quarkonium states in high energy heavy ion
collisions proceed via "off-diagonal" combinations of a quark and an antiquark.
The physical process involved belongs to a general class of quark
"recombination", although technically the recombining quarks here were never
previously bound in a quarkonium state. Features of these processes relevant as
a signature of color deconfinement are discussed.


title:
Measuring the Cosmic Ray Muon-Induced Fast Neutron Spectrum by (n,p)
  Isotope Production Reactions in Underground Detectors

abstract:
  While cosmic ray muons themselves are relatively easy to veto in underground
detectors, their interactions with nuclei create more insidious backgrounds
via: (i) the decays of long-lived isotopes produced by muon-induced spallation
reactions inside the detector, (ii) spallation reactions initiated by fast
muon-induced neutrons entering from outside the detector, and (iii) nuclear
recoils initiated by fast muon-induced neutrons entering from outside the
detector. These backgrounds, which are difficult to veto or shield against, are
very important for solar, reactor, dark matter, and other underground
experiments, especially as increased sensitivity is pursued. We used fluka to
calculate the production rates and spectra of all prominent secondaries
produced by cosmic ray muons, in particular focusing on secondary neutrons, due
to their importance. Since the neutron spectrum is steeply falling, the total
neutron production rate is sensitive just to the relatively soft neutrons, and
not to the fast-neutron component. We show that the neutron spectrum in the
range between 10 and 100 MeV can instead be probed by the (n, p)-induced
isotope production rates 12C(n, p)12B and 16O(n, p)16N in oil- and water-based
detectors. The result for 12B is in good agreement with the recent KamLAND
measurement. Besides testing the calculation of muon secondaries, these results
are also of practical importance, since 12B (T1/2 = 20.2 ms, Q = 13.4 MeV) and
16N (T1/2 = 7.13 s, Q = 10.4 MeV) are among the dominant spallation backgrounds
in these detectors.


title:
Particle Physics on Ice: Constraints on Neutrino Interactions Far Above
  the Weak Scale

abstract:
  Ultra-high energy cosmic rays and neutrinos probe energies far above the weak
scale. Their usefulness might appear to be limited by astrophysical
uncertainties; however, by simultaneously considering up- and down-going
events, one may disentangle particle physics from astrophysics. We show that
present data from the AMANDA experiment in the South Pole ice already imply an
upper bound on neutrino cross sections at energy scales that will likely never
be probed at man-made accelerators. The existing data also place an upper limit
on the neutrino flux valid for any neutrino cross section. In the future,
similar analyses of IceCube data will constrain neutrino properties and fluxes
at the O(10%) level.


title: Nucleon quark distributions in a covariant quark-diquark model

abstract:
  Spin-dependent and spin-independent quark light-cone momentum distributions
and structure functions are calculated for the nucleon. We utilize a modified
Nambu-Jona-Lasinio model in which confinement is simulated by eliminating
unphysical thresholds for nucleon decay into quarks. The nucleon bound state is
obtained by solving the Faddeev equation in the quark-diquark approximation,
where both scalar and axial-vector diquark channels are included. We find
excellent agreement between our model results and empirical data.


title:
Next-to-Leading Order Corrections to Single Top Quark Production and
  Decay at the Tevatron: 2. $t$-channel Process

abstract:
  We present a study of the $t$-channel mode of single top quark production at
the upgraded Tevatron $p\bar{p}$ collider, including the next-to-leading order
(NLO) QCD corrections to the production and the decay of a single top quark.
The narrow width approximation was adopted in order to preserve the spin of the
top quark in its production and decay. We discuss the effects of different
$O(\alpha_s)$ contributions on the inclusive cross section as well as various
kinematic distributions after imposing the relevant cuts to select $t$-channel
single top signal events.


title: Electric dipole moments as probes of new physics

abstract:
  We review several aspects of flavour-diagonal CP violation, focussing on the
role played by the electric dipole moments (EDMs) of leptons, nucleons, atoms
and molecules, which consitute the source of several stringent constraints on
new CP-violating physics. We dwell specifically on the calculational aspects of
applying the hadronic EDM constraints, reviewing in detail the application of
QCD sum-rules to the calculation of nucleon EDMs and CP-odd pion-nucleon
couplings. We also consider the current status of EDMs in the Standard Model,
and on the ensuing constraints on the underlying sources of CP-violation in
physics beyond the Standard Model, focussing on weak-scale supersymmetry.


title: B -> pi pi Decays and New Physics

abstract:
  This paper has been withdrawn by the authors, due to a mistake which
invalidates the analysis. One can never detect the presence of I=0 new physics
in B -> pi pi.


title:
Monte-Carlo generator for e+e- annihilation into lepton and hadron pairs
  with precise radiative corrections

abstract:
  Recently, various cross sections of e+e- annihilation into hadrons were
accurately measured in the energy range from 0.37 to 1.39 GeV with the CMD-2
detector at the VEPP-2M collider. In the pi+pi- channel a systematic
uncertainty of 0.6% has been achieved. A Monte-Carlo Generator Photon Jets
(MCGPJ) was developed to simulate events of the Bhabha scattering as well as
production of two charged pions, kaons and muons. Based on the formalism of
Structure Functions, the leading logarithmic contributions related to the
emission of photon jets in the collinear region are incorporated into the MC
generator. Radiative corrections (RC) in the first order of alpha are accounted
for exactly. The theoretical precision of the cross sections with RC is
estimated to be better than 0.2%. Numerous tests of the program as well as
comparison with other MC generators and CMD-2 experimental data are presented.


title: TeV gravity at neutrino telescopes

abstract:
  Cosmogenic neutrinos reach the Earth with energies around 10^9 GeV, and their
interactions with matter will be measured in upcoming experiments (Auger,
IceCube). Models with extra dimensions and the fundamental scale at the TeV
could imply signals in these experiments. In particular, the production of
microscopic black holes by cosmogenic neutrinos has been extensively studied in
the literature. Here we make a complete analysis of gravity-mediated
interactions at larger distances, where they can be calculated in the eikonal
approximation. In these processes a neutrino of energy E_\nu interacts
elastically with a parton inside a nucleon, loses a small fraction y of its
energy, and starts a hadronic shower of energy y E_\nu << E_\nu. We analyze the
ultraviolet dependence and the relevance of graviton emission in these
processes, and show that they are negligible. We also study the energy
distribution of cosmogenic events in AMANDA and IceCube and the possibility of
multiple-bang events. For any neutrino flux, the observation of an enhanced
rate of neutral current events above 100 TeV in neutrino telescopes could be
explained by TeV-gravity interactions. The values of the fundamental scale of
gravity that IceCube could reach are comparable to those to be explored at the
LHC.


title: Spontaneous current generation in the gapless 2SC phase

abstract:
  It is found that, except chromomagnetic instability, the gapless 2SC phase
also exhibits a paramagnetic response to the perturbation of an external color
neutral baryon current. The spontaneously generated baryon current driven by
the mismatch is equivalent to the one-plane wave LOFF state. We describe the
2SC phase in the nonlinear realization framework, and show that each
instability indicates the spontaneous generation of the corresponding pseudo
Nambu-Golstone current. We show this Nambu-Goldstone currents generation state
covers the gluon phase as well as the one-plane wave LOFF state. We further
point out that, when charge neutrality condition is required, there exists a
narrow unstable LOFF (Us-LOFF) window, where not only off-diagonal gluons but
the diagonal 8-th gluon cannot avoid the magnetic instability. We discuss that
the diagonal magnetic instability in this Us-LOFF window cannot be cured by
off-diagonal gluon condensate in color superconducting phase, and it will also
show up in some constrained Abelian asymmetric superfluid/superconducting
system.


title: Radiative Magnification of Neutrino Mixings in Split Supersymmetry

abstract:
  Radiative corrections to neutrino mixings in seesaw models depend on the
nature of new physics between the weak and the GUT-seesaw scales and can be
taken into account using the renormalization group equations. This new physics
effect becomes particularly important for models with quasi-degenerate neutrino
masses where small neutrino mixings at the seesaw scale can get magnified by
radiative renormalization effects alone to match observations. This mechanism
of radiative magnification which provides a simple understanding of why lepton
mixings are so different from quark mixings was demonstrated by us for the
standard supersymmetry scenario where the particle spectrum becomes
supersymmetric above the weak scale. In this paper, we examine this phenomenon
in split supersymmetry scenarios and find that the mechanism works also for
this scenario provided the SUSY scale is at least 2-3 orders below the
GUT-seesaw scale and one has larger values of ${\tan\beta}$.


title:
Constraints on Weakly Mixed Sterile Neutrinos in the Light of SNO Salt
  Phase and 766.3 Ty KamLAND Data

abstract:
  The possibility of flavor transitions into sterile neutrinos (accompanying
the dominant LMA transitions) in the solar boron neutrino flux has been
examined in a scenario proposed by Hollanda and Smirnov to overcome some
generic problems of the pure LMA scenario. It is found that the most recent SNO
salt phase solar neutrino data and the KamLAND 766.3 Ty spectral data, allow
for a significant sterile presence in the solar boron neutrino flux reaching
the earth.


title: Neutrino, Cosmos, and New Physics

abstract:
  Observational manifestations of possible breaking of spin-statistics relation
for neutrinos are considered. It is argued that bosonic neutrinos may form
cosmological cold dark matter, improve agreement of BBN predictions with
observations, make operative Z-burst model of ultra-high energy cosmic rays,
etc. Restrictions for an admixture of bosonic component to neutrino which
follow from double beta decay are discussed.


title: Flavor and chiral oscillations with Dirac wave packets

abstract:
  We report about recent results on Dirac wave packets in the treatment of
neutrino flavor oscillation where the initial localization of a spinor state
implies an interference between positive and negative energy components of
mass-eigenstate wave packets. A satisfactory description of fermionic particles
requires the use of the Dirac equation as evolution equation for the
mass-eigenstates. In this context, a new flavor conversion formula can be
obtained when the effects of chiral oscillation are taken into account. Our
study leads to the conclusion that the fermionic nature of the particles, where
chiral oscillations and the interference between positive and negative
frequency components of mass-eigenstate wave packets are implicitly assumed,
modifies the standard oscillation probability. Nevertheless, for
ultra-relativistic particles and sharply peaked momentum distributions, we can
analytically demonstrate that these modifications introduce correction factors
proportional to (m12/p0) square which are practically un-detectable by any
experimental analysis


title: Unitarity constraints on top quark signatures of Higgsless models

abstract:
  We use conditions for unitarity cancellations to constrain the couplings of
the top and bottom quarks to Kaluza-Klein modes in Higgsless models of
electroweak symmetry breaking. An example for the mass spectrum of quark
resonances in a theory space model is given and the implications for the
collider phenomenology in the top sector are discussed, comparing to signatures
of Little Higgs and strong electroweak symmetry breaking models.


title: On CP Violation in Minimal Renormalizable SUSY SO(10) and Beyond

abstract:
  We investigate the role of CP phases within the renormalizable SUSY SO(10)
GUT with one 10_H, one 126bar_H one 126_H and one 210_H Higgs representations
and type II seesaw dominating the neutrino mass matrix. This framework is non
trivially predictive in the fermionic sector and connects in a natural way the
GUT unification of b and tau Yukawa couplings with the bi-large mixing scenario
for neutrinos. On the other hand, existing numerical analysis claim that
consistency with quark and charged lepton data prevents the minimal setup from
reproducing the observed CP violation via the Cabibbo-Kobayashi-Maskawa (CKM)
matrix. We re-examine the issue and find by inspection of the fermion mass sum
rules and a detailed numerical scan that, even though the CKM phase takes
preferentially values in the second quadrant, the agreement of the minimal
model with the data is actually obtained in a non negligible fraction of the
parameter space. We then consider a recently proposed renormalizable extension
of the minimal model, obtained by adding one chiral 120-dimensional Higgs
supermultiplet. We show that within such a setup the CKM phase falls naturally
in the observed range. We emphazise the robust predictivity of both models here
considered for neutrino parameters that are in the reach of ongoing and future
experiments.


title:
The third-order QCD corrections to deep-inelastic scattering by photon
  exchange

abstract:
  We compute the full three-loop coefficient functions for the structure
functions F_2 and F_L in massless perturbative QCD. The results for F_L
complete the next-to-next-to-leading order description of unpolarized
electromagnetic deep-inelastic scattering. The third-order coefficient
functions for F_2 form, at not too small values of the Bjorken variable x, the
dominant part of the next-to-next-to-next-to-leading order corrections, thus
facilitating improved determinations of the strong coupling alpha_s from
scaling violations. The three-loop corrections to F_L are larger than those for
F_2. Especially for the latter quantity the expansion in powers of alpha_s is
very stable, for photon virtualities Q^2 >> 1 GeV^2, over the full x-range
accessible to fixed-target and collider measurements.


title: Possibility of tanbeta measurement in CMS at LHC

abstract:
  The achievable tanbeta determination accuracy for CMS at LHC is presented.
Using MSSM H/A->tau tau decay in the associated production process gg->bbH/A
the event rates are measured at large tanbeta and the systematic and
statistical errors are estimated. Due to sensitivity of the above event rates
to tanbeta it is shown that it is possible to determine constraints on tanbeta
for a given set of SUSY parameters and uncertainties.


title: Infrared Behaviour and Running Couplings in Interpolating Gauges in QCD

abstract:
  We consider the class of gauges that interpolates between Landau- and
Coulomb-gauge QCD, and show the non-renormalisation of the two independent
ghost-gluon vertices. This implies the existence of two RG-invariant running
couplings, one of which is interpreted as an RG-invariant gauge parameter. We
also present the asymptotic infrared limit of solutions of the Dyson-Schwinger
equations in interpolating gauges. The infrared critical exponents of these
solutions as well as the resulting infrared fixed point of one of the couplings
are independent of the gauge parameter. This coupling also has a fixed point in
the Coulomb gauge limit and constitutes a second invariant charge besides the
well known colour-Coulomb potential.


title:
Laboratory bounds on Lorentz symmetry violation in low energy neutrino
  physics

abstract:
  Quantitative bounds on Lorentz symmetry violation in the neutrino sector have
been obtained by analyzing existing laboratory data on neutron $\beta$ decay
and pion leptonic decays. In particular some parameters appearing in the
energy-momentum dispersion relations for $\nu_e$ and $\nu_\mu$ have been
constrained in two typical cases arising in many models accounting for Lorentz
violation.


title: The Supersymmetric Fine-Tuning Problem and TeV-Scale Exotic Scalars

abstract:
  A general framework is presented for supersymmetric theories that do not
suffer from fine-tuning in electroweak symmetry breaking. Supersymmetry is
dynamically broken at a scale \Lambda \approx (10 - 100) TeV, which is
transmitted to the supersymmetric standard model sector through standard model
gauge interactions. The dynamical supersymmetry breaking sector possesses an
approximate global SU(5) symmetry, whose SU(3) x SU(2) x U(1) subgroup is
explicitly gauged and identified as the standard model gauge group. This SU(5)
symmetry is dynamically broken at the scale \Lambda, leading to
pseudo-Goldstone boson states, which we call xyons. We perform a detailed
estimate for the xyon mass and find that it is naturally in the multi-TeV
region. We study general properties of xyons, including their lifetime, and
study their collider signatures. A generic signature is highly ionizing tracks
caused by stable charged bound states of xyons, which may be observed at the
LHC. We also consider cosmology in our scenario and find that a consistent
picture can be obtained. Our framework is general and does not depend on the
detailed structure of the Higgs sector, nor on the mechanism of gaugino mass
generation.


title: Chizhov and Petcov Reply

abstract:
  We have found in [1] new conditions for a total neutrino conversion in the
case of neutrino oscillations taking place in a medium, consisting of n = 2 (or
3) alternating layers with constant densities $N_1$ and $N_2$. It is claimed in
[4] that our results are particular case of enhancement of neutrino
oscillations, which was suggested earlier by other authors and was widely
discussed in the literature. We refute these claims, confirming the novelty of
our results.


title: Electroweak Baryogenesis from Late Neutrino Masses

abstract:
  Electroweak Baryogenesis, given a first order phase transition, does not work
in the standard model because the quark Yukawa matrices are too hierarchical.
On the other hand, the neutrino mass matrix is apparently not hierarchical. In
models with neutrino mass generation at low scales, the neutrino Yukawa
couplings lead to large CP-violation in the reflection probability of heavy
leptons by the expanding Higgs bubble wall, and can generate the observed
baryon asymmetry of the universe. The mechanism predicts new vector-like
leptons below the TeV scale and sizable mu -> e processes.


title:
The amplitude of lepton-pair production in relativistic ion collisions
  beyond the perturbative theory

abstract:
  We investigate the structure of some first terms of Watson series
representing the amplitude of lepton-pair production in the ion collisions. It
is shown that infrared instabilities of individual terms trend to cancel each
other providing the infrared stability of whole amplitude.


title:
The effects of non-standard Z couplings on the lepton polarizations in
  B_s to \gamma \ell^+ \ell^- decays

abstract:
  The fact that the measured B to \pi \pi, \pi K branching ratios exhibit
puzzling patterns has received a lot of attention in the literature and
motivated the formulation of a series of new physics scenarios with enhanced
Z-penguins. In this work, we analyze the effect of such an enhancement on the
lepton polarization asymmetries of B_s to \gamma \ell^+ \ell^- decays by
applying the results of a specific scenario for the solution of ``B to \pi K
puzzle''.


title:
Dimensionally regularized one-loop tensor-integrals with massless
  internal particles

abstract:
  A set of one-loop vertex and box tensor-integrals with massless internal
particles has been obtained directly without any reduction method to
scalar-integrals. The results with one or two massive external lines for the
vertex integral and zero or one massive external lines for the box integral are
shown in this report. Dimensional regularization is employed to treat any soft
and collinear (IR) divergence. A series expansion of tensor-integrals with
respect to an extra space-time dimension for the dimensional regularization is
also given. The results are expressed by very short formulas in a suitable
manner for a numerical calculation.


title: The Intermediate Higgs

abstract:
  Two paradigms for the origin of electroweak superconductivity are a weakly
coupled scalar condensate, and a strongly coupled fermion condensate. The
former suffers from a finetuning problem unless there are cancelations to
radiative corrections, while the latter presents potential discrepancies with
precision electroweak physics. Here we present a framework for electroweak
symmetry breaking which interpolates between these two paradigms, and mitigates
their faults. As in Little Higgs theories, the Higgs is a pseudo-Nambu
Goldstone boson, potentially composite. The cutoff sensitivity of the one loop
top quark contribution to the effective potential is canceled by contributions
from additional vector-like quarks, and the cutoff can naturally be higher than
in the minimal Standard Model. Unlike the Little Higgs models, the cutoff
sensitivity from one loop gauge contributions is not canceled. However, such
gauge contributions are naturally small as long as the cutoff is below 6 TeV.
Precision electroweak corrections are suppressed relative to those of
Technicolor or generic Little Higgs theories. In some versions of the
intermediate scenario, the Higgs mass is computable in terms of the masses of
these additional fermions and the Nambu-Goldstone Boson decay constant. In
addition to the Higgs, new scalar and pseudoscalar particles are typically
present at the weak scale.


title:
Probing signals of the littlest Higgs model via the $WW$ fusion
  processes at the high energy $e^{+}e^{-}$ collider

abstract:
  In the framework of the littlest Higgs($LH$) model, we consider the processes
$e^{+}e^{-}\to\nu\bar{\nu}H^{0}$ and $e^{+}e^{-}\to
W^{*}W^{*}\nu\bar{\nu}\to\nu\bar{\nu}t\bar{t}$, and calculate the contributions
of new particles to the cross sections of these processes in the future high
energy $e^{+}e^{-}$ collider($ILC$) with $\sqrt{S}=1TeV$. We find that, with
reasonable values of the free parameters, the deviations of the cross sections
for the processes $e^{+}e^{-}\to\nu\bar{\nu}H^{0}$ from its $SM$ value might be
comparable to the future $ILC$ measurement precision. The contributions of the
light Higgs boson $H^0 $ to the process $e^{+}e^{-}\to
W^{*}W^{*}\nu\bar{\nu}\to\nu\bar{\nu}t\bar{t}$ are significant large in all of
the parameter space preferred by the electroweak precision data, which might be
detected in the future $ILC$ experiments. However, the contributions of the new
gauge bosons $B_{H}$ and $Z_{H}$ to this process are very small.


title: Relativistic five-quark equations and negative parity pentaquarks

abstract:
  The relativistic five-quark equations are found in the framework of the
dispersion relation technique. The solutions of these equations using the
method based on the extraction of the leading singularities of the amplitudes
are obtained. The five-quark amplitudes for the low-lying pentaquarks including
the u, d, s- quarks are calculated. The poles of these amplitudes determine the
masses of the negative parity pentaquarks with I = 0, 1 and spin 3/2-, 5/2-.
The mass of the lowest pentaquark with I = 0 and spin 3/2- is equal to 1514
MeV.


title: QCD analysis of bar p N -> gamma* pi in the scaling limit

abstract:
  We study the scaling regime of nucleon - anti-nucleon annihilation into a
deeply virtual photon and a meson, bar p N -> gamma* pi. We obtain the leading
twist amplitude in the kinematical region where it factorizes into an
antiproton distribution amplitude, a short-distance matrix element related to
nucleon form factor and the long-distance dominated transition distribution
amplitudes which describe the nucleon to meson transition. We give the Q^2
evolution equation for these transition distribution amplitudes. The scaling of
the cross section of this process may be tested at the proposed GSI intense
anti-proton beam facility FAIR with the PANDA or PAX detectors. We comment on
related processes such as pi N -> N' gamma* and gamma* N -> N' pi which may be
experimentally studied at intense meson beams facilities and at JLab or Hermes,
respectively.


title:
Intrinsically acting Pauli principle as the origin of three Standard
  Model generations of leptons and quarks

abstract:
  We turn back to the hypothesis that the Pauli principle, acting intrinsically
within leptons and quarks, is the origin of their three generations. The
adequate formalism is based on the generalized Dirac equations arising (in the
interaction-free case) from the Klein-Gordon equations through the familiar
squared-root procedure (but applied in the generic way). This leads to the
existence of {\it additional} Dirac bispinor indices decoupled from the
Standard Model gauge fields, thus nonobserved in these fields and, in
consequence, {\it not distinguishable} from each other. They are treated as
dynamical degrees of freedom obeying the Pauli principle along with Fermi
statistics. Then, they produce within leptons and quarks the total additional
spin equal to zero, and cause the existence of {\it three and only three}
generations of Standard Model leptons and quarks. In the second part of the
note we discuss the role of the new generation-weighting factors in building up
the spectra of charged leptons and neutrinos.


title:
How Can We Go From Hadron Collider Data Toward the Underlying Theory
  That Extends the Standard Model? After the Champagne

abstract:
  This is a composite based on talks at Physics at LHC, Vienna, July 2004,
TeV4LHC, Fermilab, Sept. 2004, and the String Phenomenology meeting, Perimeter
Institute, March 2005.


title: Isospin Violation in Pion-Nucleon Scattering at Threshold

abstract:
  We discuss the electromagnetic corrections to the pion-nucleon scattering
lengths generated by minimal e. m. coupling from a knowledge of the low energy
expansion of the pion-nucleon elastic scattering amplitude as well as from the
nucleon and delta pole terms, all a consequence of purely strong interactions.
We assume the heavy baryon limit; the e.m. and axial form factors and the
masses are used with their empirical values, such that there is no free
parameter. The different terms have a clear physical and intuitive origin. In
particular, a large isospin breaking contribution to the isoscalar term appears
for the elastic charged-pion scattering lengths. We attempt a comparison to the
results from chiral effective field theory (EFT) with a physical interpretation
of the empirical constants in that approach. The results are applied to the
energy shift and width of pionic hydrogen.


title: Hadronic physics with the CMS experiment

abstract:
  The capabilities of the CMS detector are shown and its Heavy Ion program is
outlined.


title: Gluino Air Showers as a Signal of Split Supersymmetry

abstract:
  It has been proposed recently that, within the framework of split
Supersymmetry, long lived gluinos generated in astrophysical sources could be
detected using the signatures of the air showers they produce, thus providing a
lower bound for their lifetime and for the scale of SUSY breaking. We present
the longitudinal profile and lateral spread of $G$-hadron induced extensive air
showers and consider the possibility of measuring them with a detector with the
characteristics of the Pierre Auger Observatory.


title:
Monte Carlo simulation of events with Drell-Yan lepton pairs from
  antiproton-proton collisions: the fully polarized case

abstract:
  In this paper, we extend the study of Drell-Yan processes with antiproton
beams already presented in a previous work. We consider the fully polarized
$\bar{p}^\uparrow p^\uparrow \to \mu^+ \mu^- X$ process, because this is the
simplest scenario for extracting the transverse spin distribution of quarks, or
transversity, which is the missing piece to complete the knowledge of the
nucleon spin structure at leading twist. We perform Monte Carlo simulations for
transversely polarized antiproton and proton beams colliding at a
center-of-mass energy of interest for the future HESR at GSI. The goal is to
possibly establish feasibility conditions for an unambiguous extraction of the
transversity from data on double spin asymmetries.


title: Swimming with Quarks

abstract:
  These six lectures, given at the XI Mexican School of Particles and Fields
held at Xalapa in August 2004, are on the subject of strong coupling QCD. How
this colours and shapes the hadron world in terms of (i) the hadron spectrum,
(ii) chiral symmetry breaking, (iii) dynamical mass generation and (iv)
confinement, are the topics discussed.


title:
Solving constrained Markovian evolution in QCD with the help of the
  non-Markovian Monte Carlo

abstract:
  We present the constrained Monte Carlo (CMC) algorithm for the QCD evolution.
The constraint resides in that the total longitudinal energy of the emissions
in the MC and in the underlying QCD evolution is predefined (constrained). This
CMC implements exactly the full DGLAP evolution of the parton distributions in
the hadron with respect to the logarithm of the energy scale. The algorithm of
the CMC is referred to as the non-Markovian type. The non-Markovian MC
algorithm is defined as the one in which the multiplicity of emissions is
chosen randomly as the first variable and not the last one, as in the Markovian
MC algorithms. The former case resembles that of the fixed-order matrix element
calculations. The CMC algorithm can serve as an alternative to the so-called
backward evolution Markovian algorithm of Sjostrand, which is used for
modelling the initial-state parton shower in modern QCD MC event generators. We
test practical feasibility and efficiency of our CMC implementation in a series
of numerical exercises, comparing its results with those from other MC and
non-MC programs, in a wide range of Q and x, down to the 0.1% precision level.
In particular, satisfactory numerical agreement is found with the results of
the Markovian MC program of our own and the other non-MC program. The
efficiency of the new constrained MC is found to be quite good.


title: Neutrino matter potentials induced by Earth

abstract:
  An instructive method of deriving the matter potentials felt by neutrinos
propagating through matter on Earth is presented. This paper thoroughly guides
the reader through the calculations involving the effective weak Hamiltonian
for lepton and quark scattering. The matter potentials are well-known results
since the late 70's, but a detailed and pedagogical calculation of these
quantities is hard to find. We derive potentials due to charged and neutral
current scattering on electrons, neutrons and protons. Intended readership is
for undergraduates/graduates in the fields of relativistic quantum mechanics
and quantum field theory. In addition to the derivation of the potentials for
neutrinos, we explicitely study the origin of the reversed sign for potentials
in the case of antineutrino-scattering.


title: Probing the Origins of Neutrino Mass with Supernova Data

abstract:
  We study type II supernova signatures of neutrino mass generation via
symmetry breaking at a scale in the range from keV to MeV. The scalar
responsible for symmetry breaking can be thermalized in the supernova core and
restore the symmetry. The neutrinos from scalar decays have about half the
average energy of thermal neutrinos and are Bose-Einstein distributed. We find
that, even without a detailed knowledge of the supernova parameters, a
discovery is well within reach at Super-Kamiokande.


title:
Pairs-Production of Higgs in Association with Bottom Quarks Pairs at
  $e^+e^-$ Colliders

abstract:
  In a previous paper, we studied the Higgs pair production in the standard
model with the reaction $e^{+}e^{-}\to t \bar t HH$. Based on this, we study
the Higgs pair production via $e^{+}e^{-}\to b \bar b HH$. We evaluate the
total cross section of $b\bar bHH$ and calculate the number total of events
considering the complete set of Feynman diagrams at tree-level, and compare
this process with the process $e^{+}e^{-}\to t \bar t HH$. The numerical
computation is done for the energy which is expected to be available at a
possible Next Linear $e^{+}e^{-}$ Collider with a center-of-mass energy $800,
1000, 1600$ $GeV$ and luminosity 1000 $fb^{-1}$.


title: An algebraic/numerical formalism for one-loop multi-leg amplitudes

abstract:
  We present a formalism for the calculation of multi-particle one-loop
amplitudes, valid for an arbitrary number N of external legs, and for massive
as well as massless particles. A new method for the tensor reduction is
suggested which naturally isolates infrared divergences by construction. We
prove that for N>4, higher dimensional integrals can be avoided. We derive many
useful relations which allow for algebraic simplifications of one-loop
amplitudes. We introduce a form factor representation of tensor integrals which
contains no inverse Gram determinants by choosing a convenient set of basis
integrals. For the evaluation of these basis integrals we propose two methods:
An evaluation based on the analytical representation, which is fast and
accurate away from exceptional kinematical configurations, and a robust
numerical one, based on multi-dimensional contour deformation. The formalism
can be implemented straightforwardly into a computer program to calculate
next-to-leading order corrections to multi-particle processes in a largely
automated way.


title: Resonance radiative decays as a tool for its parity determination

abstract:
  Radiative decays of the spin 1/2 baryonic resonances R with the decay mode R
-> KN in case of small energy release are considered. Pentaquark is an example
of such resonance. It is shown that in case of positive resonance parity
corrections to the soft photon radiation formula are large even at low photon
energies > 20 MeV and structure terms contributions may be essential, if R size
> 1 fm. This effect is absent in case of negative parity. Particularly,
measurements of the gamma spectrum in pentaquark radiative decays may allow us
to determine its parity.


title:
Yukawa Induced Radiative Corrections to the Lightest Higgs Boson Mass in
  the NMSSM

abstract:
  We compute the leading logarithmic radiative corrections to the lightest
Higgs mass in the NMSSM involving the electroweak gauge couplings and in the
NMSSM specific Yukawa couplings lambda and kappa (including all mixed
combinations), which are induced by chargino, neutralino and Higgs boson loops.
The effect of the NMSSM specific Yukawa couplings lambda and kappa is to
increase the upper bound on the lightest Higgs mass by up to ~2 GeV, but they
can also decrease the lightest Higgs mass by up to ~-20 GeV.


title:
Ultra High Energy Tau Neutrinos and Fluorescence Detectors: A
  Phenomenological Approach

abstract:
  We investigate the possibility of detecting ultra-high energy cosmic
tau-neutrinos by means of a process involving a double extensive air shower,
the so-called Double-Bang Phenomenon. In this process a primary tau-neutrino
interacts with an atmospheric quark creating a hadronic extensive air shower
that contains a tau which subsequently decays creating a second extensive air
shower. The number of these events strongly depends on the cross section and on
the flux of ultra-high energy tau-neutrinos arriving at the Earth's atmosphere.
We estimate the potential of optical detectors to observe Double-Bang events
induced by tau-neutrinos with energies of about 1 EeV whose detection may
confirm the maximal mixing observed in the atmospheric neutrinos also for
ultra-high energy neutrinos, and give information on the neutrino flux and
cross-section. For neutrino-nucleon Standard Model extrapolated cross-section
and thick source model of flux (MPR), we estimate an event rate of 0.48/yr for
an observatory with two fluorescence detectors with 90% efficiency in the
neutrino energy range 0.5 < E_nu < 5 EeV.


title: The Energy Momentum Tensor of Chiral Quark Models at Low Energies

abstract:
  The low energy structure of the energy momentum tensor in several chiral
quark models with SU(3) flavor symmetry is analyzed in the presence of external
gravitational fields. To this end a derivative expansion in a curved four
dimensional space time is considered. This allows us to compute the chiral
coefficients $L_{11}$, $L_{12}$, and $L_{13}$, appearing when the model is
coupled to gravity and related to space-time curvature properties.


title:
Dynamical Gauge Symmetry Breaking by Wilson Lines in the Electroweak
  Theory

abstract:
  In higher dimensional gauge theory, dynamics of non-Abelian Aharonov-Bohm
phases induces gauge symmetry breaking through the Hosotani mechanism. Higgs
fields in the four-dimensional spacetime are identified with the
extra-dimensional components of the gauge fields. Basics of the Hosotani
mechanism are reviewed, and applied to the electroweak theory. The Higgs boson
mass and the Kaluza-Klein excitation scale are related to the weak W-boson
mass.


title: Magnetic moment of the pentaquark state $\Theta^+(1540)$

abstract:
  In this article, we study the magnetic moment of the pentaquark $
\Theta^+(1540)$ as (scalar)diquark-(pseudoscalar)diquark-antiquark state with
the QCD sum rules approach in the external electromagnetic field. Due to the
special structure of the interpolating current, only the electromagnetic
interactions of the $s$ quark with the external field have contributions to the
magnetic moment with tensor structure $\{\sigma_{\mu\nu} {\hat p} +{\hat
p}\sigma_{\mu\nu}\}$. The numerical results indicate the magnetic moment of the
pentaquark state $ \Theta^+(1540)$ is about
$\mu_{\Theta^+}=(0.16\pm0.03)\mu_N$.


title: Possible energy-dependence of Theta_13 in neutrino oscillations

abstract:
  A simple three-flavor neutrino-oscillation model is discussed which has both
nonzero mass differences and timelike Fermi-point splittings, together with a
combined bi-maximal and trimaximal mixing pattern. One possible consequence
would be new effects in \nu_{\mu} \to \nu_{e} oscillations, characterized by an
energy-dependent effective mixing angle \Theta_{13}. Future experiments such as
T2K and NOvA, and perhaps even the current MINOS experiment, could look for
these effects.


title:
Analyticity properties of three-point functions in QCD beyond leading
  order

abstract:
  The removal of unphysical singularities in the perturbatively calculable part
of the pion form factor--a classic example of a three-point function in QCD--is
discussed. Different ``analytization'' procedures in the sense of Shirkov and
Solovtsov re examined in comparison with standard QCD perturbation theory. We
show that demanding the analyticity of the partonic amplitude as a
\emph{whole}, as proposed before by Karanikas and Stefanis, one can make
infrared finite not only the strong running coupling and its powers, but also
cure potentially large logarithms (that first appear at next-to-leading order)
containing the factorization scale and modifying the discontinuity across the
cut along the negative real axis. The scheme used here generalizes the Analytic
Perturbation Theory of Shirkov and Solovtsov to non-integer powers of the
strong coupling and diminishes the dependence of QCD hadronic quantities on all
perturbative scheme and scale-setting parameters, including the factorization
scale.


title:
Unification without supersymmetry: neutrino mass, proton decay and light
  leptoquarks

abstract:
  We investigate predictions of a minimal realistic non-supersymmetric SU(5)
grand unified theory. To accomplish unification and generate neutrino mass we
introduce one extra Higgs representation--a 15 of SU(5)--to the particle
content of the minimal Georgi-Glashow scenario. Generic prediction of this
setup is a set of rather light scalar leptoquarks. In the case of the most
natural implementation of the type II see-saw mechanism their mass is in the
phenomenologically interesting region (O(10^2--10^3) GeV). As such, our
scenario has a potential to be tested at the next generation of collider
experiments, particularly at the Large Hadron Collider (LHC) at CERN. The
presence of the 15 generates additional contributions to proton decay which,
for light scalar leptoquarks, can be more important than the usual gauge d=6
ones. We exhaustively study both and show that the scenario is not excluded by
current experimental bounds on nucleon lifetimes.


title:
Lepton-number violation and right-handed neutrinos in Higgs-less
  effective theories

abstract:
  Following previous work, we identify a symmetry S_nat that generalizes the
concept of custodial symmetry, keeping under control deviations from the
Standard Model (SM). To realize S_nat linearly, the space of gauge fields has
to be extended. Covariant constraints formulated in terms of spurions reduce
S_nat back to SU(2)_L x U(1)_Y. This allows for a covariant introduction of
explicit S_nat-breaking parameters. We assume that S_nat is at play in a theory
of electroweak symmetry-breaking without a light Higgs particle. We describe
some consequences of this assumption, using a non-decoupling effective theory
in which the loop expansion procedure is based on both momentum and spurion
power counting, as in Chiral Perturbation Theory. A hierarchy of lepton-number
violating effects follows. Leading corrections to the SM are non-oblique. The
effective theory includes stable light right-handed neutrinos, with an unbroken
Z_2 symmetry forbidding neutrino Dirac masses. nu_R contribution to dark matter
places bounds on their masses.


title: Dilepton production from non-equilibrium hot hadronic matter

abstract:
  It is investigated under which conditions an adiabatic adaption of the
dynamic and spectral information of vector mesons to the changing medium in
heavy ion collisions, as assumed in schematic model calculations and
microscopic transport simulations, is a valid assumption. Therefore time
dependent medium modifications of low mass vector mesons are studied within a
non-equilibrium quantum field theoretical description. Timescales for the
adaption of the spectral properties are given and non-equilibrium dilepton
yields are calculated, leading to the result that memory effects are not
negligible for most scenarios.


title: Invisible Technicolor

abstract:
  We propose a scenario of dynamical electroweak symmetry breaking which is
applicable to the model with no tree-level potential for the elementary Higgs
doublet field. An example of such a model is the gauge-Higgs unification model.
The strong coupling "technicolor" dynamics can provide the scale of the
electroweak symmetry breaking in the potential of the Higgs doublet field. The
negative mass squared and quartic coupling can be generated through the Yukawa
couplings among heavy and light "technifermions" and the Higgs doublet field.
Since the massless "technifermion" is singlet under the electroweak gauge
symmetry, no large corrections to the electroweak observables arise. As a
prediction of this scenario, there must be a pseudo-Nambu-Goldstone boson which
couple with the Higgs field in a specific way, though it is singlet under the
standard model gauge symmetry.


title: Grand Unified Theory based on the SU(6) symmetry

abstract:
  We present a complete set of generators for the rank 5 special unitary group,
SU(6), to unify strong, weak and electromagnetic interactions. The unification
is realized through the breaking pattern of SU)6) -> SU(3)_C x SU(3)_H x U(1)_C
followed by SU(3)_H -> SU(2)_L x U(1)_B. All known elementary particles and its
quantum numbers are well accomodated in its {6} and {15} multiplets. These
multiplets require a new neutral fermion which should be assigned as the heavy
Majorana neutrino to realize the seesaw mechanism naturally in the minimal
scenario of this model.


title:
New Method for Numerically Solving the Chemical Potential Dependence of
  the Dressed Quark Propagator

abstract:
  Based on the rainbow approximation of Dyson-Schwinger equation and the
assumption that the inverse dressed quark propagator at finite chemical
potential is analytic in the neighborhood of $\mu=0$, a new method for
obtaining the dressed quark propagator at finite chemical potential $\mu$ from
the one at zero chemical potential is developed. Using this method the dressed
quark propagator at finite chemical potential can be obtained directly from the
one at zero chemical potential without the necessity of numerically solving the
corresponding coupled integral equations by iteration methods. A comparison
with previous results is given.


title: Neutrino Data and Neutrino-Antineutrino Transition

abstract:
  A problem, whether a neutrino-antineutrino transition could be responsible
for the muon neutrino deficit found in underground experiments
(Super-Kamiokande, MACRO, Soudan 2) and in the accelerator long-baseline K2K
experiment, is discussed in this paper. The intention of the work is not
consideration of concrete models for muon neutrino-antineutrino transition but
a desire to attract an attention to another possibility of understanding the
nature of the measured muon neutrino deficit in neutrino experiments.


title: Dynamics of pentaquarks in constituent quark models: recent developments

abstract:
  Some recent developments in the study of light and heavy pentaquarks are
reviewed, mainly within constituent quark models. Emphasis is made on results
obtained in the flavor-spin model where a nearly ideal octet-antidecuplet
mixing is obtained. The charmed antisextet is reviewed in the context of an
SU(4) classification.


title:
Next-to-leading order Calculation of a Fragmentation Function in a
  Light-Cone Gauge

abstract:
  The short-distance coefficients for the color-octet ^3S_1 term in the
fragmentation function for a gluon to split into polarized heavy quarkonium
states are re-calculated to order alpha_s^2. The light-cone gauge remarkably
simplifies the calculation by eliminating many Feynman diagrams at the expense
of introducing spurious poles in loop integrals. We do not use any conventional
prescriptions for spurious pole. Instead, we only use gauge invariance with the
aid of Collins-Soper definition of the fragmentation function. Our result
agrees with a previous calculation of Braaten and Lee in the Feynman gauge, but
disagrees with another previous calculation.


title: Constraining New Models with Precision Electroweak Data

abstract:
  Electroweak precision data have been extensively used to constrain models
containing physics beyond that of the Standard Model. When the model contains
Higgs scalars in representations other than singlets or doublets, and hence rho
not equal to 1 at tree level, a correct renormalization scheme requires more
inputs than the three commonly used for the Standard Model case. In such cases,
the one loop electroweak results cannot be split into a Standard Model
contribution plus a piece which vanishes as the scale of new physics becomes
much larger than M_W. We illustrate our results by presenting the dependence of
M_W on the top quark mass in a model with a Higgs triplet and in the SU(2)_L x
SU(2)_R left-right symmetric model. In these models, the allowed range for the
lightest neutral Higgs mass can be as large as a few TeV.


title: A Sinister Extension of the Standard Model to SU(3)XSU(2)XSU(2)XU(1)

abstract:
  This paper describes work done in collaboration with Andy Cohen. In our
model, ordinary fermions are accompanied by an equal number `terafermions.'
These particles are linked to ordinary quarks and leptons by an unconventional
CP' operation, whose soft breaking in the Higgs mass sector results in their
acquiring large masses. The model leads to no detectable strong CP violating
effects, produces small Dirac masses for neutrinos, and offers a novel
alternative for dark matter as electromagnetically bound systems made of
terafermions.


title: Top and Bottom: a Brane of Their Own

abstract:
  We consider extra dimensional descriptions of models where there are two
separate strongly interacting sectors contributing to electroweak symmetry
breaking (``topcolor'' type models). In the extra dimensional picture there
would be two separate (anti-de Sitter) bulks meeting on the Planck brane, with
each bulk having its own corresponding IR (TeV) brane. Sources for electroweak
symmetry breaking can then be localized on both of these IR branes, while the
different generations of fermions may be separated from each other. We describe
the modes propagating in such a setup, and consider the cases where the
electroweak symmetry breaking on either of the two IR branes come either from a
higgsless scenario (via boundary conditions) or a (top-)Higgs. We show that the
tension that exists between obtaining a large top quark mass and the correct
value of the Zb\bar{b} couplings in ordinary higgsless models can be largely
relieved in the higgsless--top-Higgs versions of the two IR brane models. This
may also be true in the purely higgsless--higgsless case, however since that
model is necessarily in the strongly coupled regime the tree-level results for
the properties of the third generation may get large corrections. A necessary
consequence of such models is the appearance of additional pseudo-Goldstone
bosons (``top-pions''), which would be strongly coupled to the third
generation.


title: Higher Charmonia

abstract:
  This paper gives results for the spectrum, all allowed E1 radiative partial
widths (and some important M1 widths) and all open-charm strong decay
amplitudes of all 40 c-cbar states expected up to the mass of the 4S multiplet,
just above 4.4 GeV. The spectrum and radiative widths are evaluated using two
models, the relativized Godfrey-Isgur model and a nonrelativistic potential
model. The electromagnetic transitions are evaluated using Coulomb plus linear
plus smeared hyperfine wavefunctions, both in a nonrelativistic potential model
and in the Godfrey-Isgur model. The open-flavor strong decay amplitudes are
determined assuming harmonic oscillator wavefunctions and the 3P0 decay model.
This work is intended to motivate future experimental studies of higher-mass
charmonia, and may be useful for the analysis of high-statistics data sets to
be accumulated by the BES, CLEO and GSI facilities.


title:
Multiplicity and transverse energy of produced gluon in relativistic
  heavy ion collision

abstract:
  We present a simple gluon production picture which is based on the
McLerran-Venugopalan model and gluon BFKL evolution in relativistic heavy ion
collision. Results for the multiplicity and transverse energy distribution in
both the central and forward rapidity regions for gluon production in early
stages of heavy ion collisions at the LHC are given. Finally, we provide a
general qualitative discussion of the consequences of the forward rapidity
behavior of produced gluons.


title: On Effects of the Large Neutrino B-Term on Low Energy Physics

abstract:
  To embed the seesaw mechanism in the MSSM, two or three right-handed neutrino
supermultiplets, $N_i$, have to be added to the model. In this framework, the
supersymmetry breaking potential will include a new term called neutrino
$B$-term: $MB_\nu \tilde{N} \tilde{N}/2$. In this talk, we present a toy model
that generates a large neutrino $B$-term keeping other supersymmetry breaking
parameters small. We then review the consequences of having a large neutrino
$B$-term on the electroweak symmetry breaking parameters and electric dipole
moments (EDMs) of elementary particles.


title: Production of Lambda(1520)

abstract:
  We investigate the Lambda(1520) photoproduction via the reaction process,
gamma N -> K Lambda(1520). We employ the Born approximation and the Rarita
Schwinger formalism is used for Lambda(1520). We reproduce the total cross
sections and the various angular distributions qualitatively well for the
proton target and estimate them for the neutron one. We find that the contact
term contributes much more to the process than the other kinematical channels.
Taking into account this fact, we reanalyze the K^*--exchange dominance
hypothesis suggested by the previous experiments.


title: A transport coefficient: the electrical conductivity

abstract:
  I describe the lattice determination of the electrical conductivity of the
quark gluon plasma. Since this is the first extraction of a transport
coefficient with a degree of control over errors, I next use this to make
estimates of other transport related quantities using simple kinetic theory
formulae. The resulting estimates are applied to fluctuations, ultra-soft
photon spectra and the viscosity. Dimming of ultra-soft photons is exponential
in the mean free path, and hence is a very sensitive probe of transport.


title: VA\tilde V correlator within the instanton vacuum model

abstract:
  The correlator of vector and nonsinglet axial-vector currents in the external
electromagnetic field is calculated within the instanton liquid model of QCD
vacuum. In general the correlator has two Lorentz structures: longitudinal w_L
and transversal w_T with respect to axial-vector index. Within the instanton
model the saturation of the anomalous w_L structure is demonstrated. It is
known that in the chiral limit the transversal structure w_T is free from
perturbative corrections. In this limit within the instanton model we calculate
the transversal invariant function w_T at arbitrary momentum transfer, q, and
show the absence of power corrections to this structure at large q^2. Instead
there arise the exponential corrections to w_T at large q^2 reflecting nonlocal
properties of QCD vacuum. The slope of w_T at zero virtuality, the QCD vacuum
magnetic susceptibility of the quark condensate and its momentum dependence are
estimated.


title:
Test of Fermi Gas Model and Plane-Wave Impulse Approximation Against
  Electron-Nucleus Scattering Data

abstract:
  A widely used relativistic Fermi gas model and plane-wave impulse
approximation are tested against electron-nucleus scattering data. Inclusive
quasi-elastic cross section are calculated and compared with high-precision
data for C, O, and Ca. A dependence of agreement between calculated cross
section and data on a momentum transfer is shown. Results for the C(nu_mu,mu)
reaction are presented and compared with experimental data of the LSND
collaboration.