title:
Higgsless Electroweak Symmetry Breaking in Warped Backgrounds:
  Constraints and Signatures

abstract:
  We examine the phenomenology of a warped 5-dimensional model based on
SU(2)$_L \times$ SU(2)$_R \times$ U(1)$_{B-L}$ model which implements
electroweak symmetry breaking through boundary conditions, without the presence
of a Higgs boson. We use precision electroweak data to constrain the general
parameter space of this model. Our analysis includes independent $L$ and $R$
gauge couplings, radiatively induced UV boundary gauge kinetic terms, and all
higher order corrections from the curvature of the 5-d space. We show that this
setup can be brought into good agreement with the precision electroweak data
for typical values of the parameters. However, we find that the entire range of
model parameters leads to violation of perturbative unitarity in gauge boson
scattering and hence this model is not a reliable perturbative framework.
Assuming that unitarity can be restored in a modified version of this scenario,
we consider the collider signatures. It is found that new spin-1 states will be
observed at the LHC and measurement of their properties would identify this
model. However, the spin-2 graviton Kaluza-Klein resonances, which are a
hallmark of the Randall-Sundrum model, are too weakly coupled to be detected.


title: Heavy Quark Production: Theory vs. Experiment

abstract:
  The current status of the comparisons between some experimental results and
theoretical predictions for heavy quark production is reviewed. It is shown
that the combination of new theoretical tools and better experimental input
allows for a good description of charm, bottom and top hadroproduction, with no
significant discrepancies between theory and experiment. Theoretical progress
in the resummation of large logarithms and inclusion of power corrections for
the heavy quark fragmentation function is also discussed.


title:
Interactions at large distances and spin effects in nucleon-nucleon and
  nucleon-nuclei scattering

abstract:
  The momentum-transfer dependence of the slopes of the spin-non-flip and
spin-flip amplitudes is analysed. It is shown that the long tail of the
hadronic potential in impact parameter space leads for hadron-hadron
interactions to a larger value of the slope for the reduced spin-flip amplitude
than for the spin-non-flip amplitude. It is shown that the preliminary
measurement of AN obtained by the E950 Collaboration confirms such a behaviour
of the hadron spin-flip amplitude.


title:
Heavy Quark $\bar{q}q$ Matrix Elements in the Nucleon from Perturbative
  QCD

abstract:
  The scalar heavy quark content of the nucleon, ${\cal M}_q = \bra{N} m_q \bar
q q \ket{N},$ is relevant for computing the interaction of dark matter
candidates with ordinary matter, while ${\cal M}_s$ is important for predicting
the properties of dense matter. We compute ${\cal M}_q$ in perturbative QCD to
${\cal{O}}{(\alpha^3)}.$ As one goes from ${\cal M}_t$ to ${\cal M}_c$ the
leading order contribution decreases as the number of light quarks is dropping,
while the radiative corrections grow and are all positive. The leading source
of uncertainty in the calculation is due to the poorly known value of ${\cal
M}_s.$ A related calculation suggests that a large value for ${\cal M}_s$ may
be reasonable.


title: Neutrino Telescopes as a Direct Probe of Supersymmetry Breaking

abstract:
  We consider supersymmetric models where the scale of supersymmetry breaking
lies between 5 $\times 10^6$ GeV and 5 $\times 10^8$ GeV. In this class of
theories, which includes models of gauge mediated supersymmetry breaking, the
lightest supersymmetric particle is the gravitino. The next to lightest
supersymmetric particle is typically a long lived charged slepton with a
lifetime between a microsecond and a second, depending on its mass. Collisions
of high energy neutrinos with nucleons in the earth can result in the
production of a pair of these sleptons. Their very high boost means they
typically decay outside the earth. We investigate the production of these
particles by the diffuse flux of high energy neutrinos, and the potential for
their observation in large ice or water Cerenkov detectors. The relatively
small cross-section for the production of supersymmetric particles is partially
compensated for by the very long range of heavy particles. The signal in the
detector consists of two parallel charged tracks emerging from the earth about
100 meters apart, with very little background. A detailed calculation using the
Waxman-Bahcall limit on the neutrino flux and realistic spectra shows that
km$^3$ experiments could see as many as 4 events a year. We conclude that
neutrino telescopes will complement collider searches in the determination of
the supersymmetry breaking scale, and may even give the first evidence for
supersymmetry at the weak scale.


title: The hadronic potential at short distance

abstract:
  A fictitious discussion is taken as a point of origin to present novel
physical insight into the nature of gauge theory and the potential energy of
QCD and QED at short distance. Emphasized is the considerable freedom in the
cut-off function which eventually can modify the Coulomb potential of two
charges at sufficiently small distances. Emphasized is also that the parameters
of the regularization function (the ``cut-off scale'') should not be driven to
infinity but kept constant in line with the modern interpretation of
renormalization theory. The paper restricts to general aspects. The technical
paraphernalia and the comparison with experiment are shifted to a sequence of 4
subsequent stand-alone and sufficiently small papers to be published
immediatelely hereafter.


title: Phenomenology of a 5D Orbifold $SU(3)_W$ Unification model

abstract:
  We study the phenomenology of a 5D $SU(3)_W$ model on a $S_1/(Z_2\times
Z'_2)$ orbifold in which the minimal scalar sector plays an essential role of
radiatively generating neutrino Majorana masses without the benefits of
right-handed singlets. We carefully examine how do the exotic scalars affect
the renormalization group (RG) equations for the gauge couplings and the 5D
$SU(3)_W$ unification. We found that the compactification scale of extra
dimension is in the range of $1/R\sim 1.5-5$ TeV. The possibility of the
existence of relatively low mass Kaluza-Klein excitations makes the
phenomenology of near term interest. Some possible bilepton signatures can be
searched for in future colliders and in neutrino scattering experiments with
intense neutrino beams. The low energy constraints from muon physics and lepton
number violating decay process induced by bilepton are also discussed.
  These constraints can provide new information on the structure of Yukawa
couplings which might be useful for future model building.


title:
Compactified Newtonian Potential and a Possible Explanation for Dark
  Matter

abstract:
  Exact Newtonian potential with an extra space dimension compactified on a
circle is derived and studied. It is found that a point mass located at one
side of the circle can generate almost the same strength of gravitational force
at the other side. Combined with the brane-world scenarios, it means that
although one can not see a particle which is confined to another brane, one can
feel its gravity explicitly as if it were located on our brane. This leads to
the conclusion that matter on all branes may contribute equally to the
curvature of our brane. Therefore, dark matter is probably nothing unusual but
a `shadow' cast on our brane by hidden ordinary matter of other branes. It is
shown that the physical effect of this `shadow' could be modeled by a perfect
fluid with an effective mass density and a non-zero pressure. This fluid could
serve as a dark matter candidate with an equation of state p_{eff}=omega rho
_{eff} where omega is a positive r-dependent function and \omega \neq 0,1/3,\
implying that it is neither cold nor hot. So, if the higher-dimensional
universe contains several branes, the total amount of hidden matter would be
able to provide the required amount for dark matter. Meanwhile, dark matter
halos of galaxies might be just halos of the effective mass distribution
yielded by hidden ordinary stars, and these stars are confined on other branes
but captured by our galaxies. Some more properties and implications are also
discussed.


title: Indications for Large Rescattering in Rare B Decays

abstract:
  The sign of $A_{\rm CP}(K^-\pi^+) < 0$, the evidence for $\bar B^0 \to
\pi^0\pi^0$, and the possibly sizable $A_{\pi\pi}$ and $S_{\pi\pi}$ in $\bar
B^0 \to \pi^+\pi^-$ all suggest that final state rescattering may be needed in
$\bar B\to PP$ decay, which is echoed by large color suppressed $\bar B^0\to
D^0h^0$ modes. An SU(3) formalism of ${\bf 8}\otimes {\bf 8} \to {\bf 8}\otimes
{\bf 8}$ rescattering in $PP$ final states leads to interesting predictions, in
particular allowing for small $\bar B^0 \to K^-K^+$.


title: Effects of New Physics on CP Violation in B Decays

abstract:
  We discuss two models with 1 extra CP phase in $b\leftrightarrow s$
transition. The CP phase $\arg (V_{t^\prime s}V_{t^\prime b})$ with fourth
generations, previously ignored, could impact on $b\to s\ell^+\ell^-$, $\Delta
m_{B_s}$ and $\sin2\Phi_{B_s}$, but does not affect EM and strong penguins.
With SUSY at TeV scale, a right-handed ``$\widetilde{sb}_{1}$'' squark can be
driven light by flavor mixing. It does not affect $b\to s\ell^+\ell^-$, but can
generate $S_{\phi K_S} < 0$ while giving $S_{\eta^\prime K_S} \sim
\sin2\Phi_{B_d} \cong0.74$. $B_s$ mixing and $\sin2\Phi_{B_s}$ would likely be
large, and $S_{K_S\pi^0\gamma}\neq 0$ in $B^0\to K^{*0}\gamma$ is promising.


title: Constraints on neutrino masses from leptogenesis models

abstract:
  Upper bounds on the CP asymmetry relevant for leptogenesis are reexamined and
found weaker than in previous literature, both for hierarchical and for
quasi-degenerate right-handed neutrinos. Successful leptogenesis implies the
usual lower bound on right-handed neutrino masses, and an upper bound on
left-handed neutrino masses (which we obtain to be 0.15eV at 3sigma) only if
right-handed neutrinos are assumed to be much more hierarchical than
left-handed neutrinos. Otherwise both bounds can be considerably relaxed. The
constraint on light neutrino masses varies assuming different interpretations
of why neutrinos should be quasi-degenerate. With conservative assumptions, we
find that a mild quasi-degeneracy allows neutrinos heavier than an eV
compatibly with leptogenesis.
  We also extend computations of thermal leptogenesis to an alternative model
of neutrino mass mediated by fermion triplets which was never considered so far
for leptogenesis. Leptogenesis can be successful despite the effect of gauge
interactions, resulting in only slightly stronger constraints on neutrino
masses.


title:
Fast simulation of flow effects in central and semi-central heavy ion
  collisions at LHC

abstract:
  The simple method for simulation of ``thermal'' hadron spectra in
ultrarelativistic heavy ion collisions including longitudinal, transverse and
elliptic flow is developed. The model is realized as fast Monte-Carlo event
generator.


title:
Signals of new physics in global event properties in pp collisions in
  the TeV energy domain: rapidity intervals

abstract:
  The study of possible new physics signals in global event properties in pp
collisions in the TeV energy domain is extended from full phase-space to
rapidity intervals experimentally accessible at LHC. The elbow structure in the
total multiplicity distribution predicted in full phase-space is clearly
present also in restricted rapidity intervals, leading to very strong charged
particle correlations. It is also found that energy densities comparable to
those reached in heavy ion collisions at RHIC could be attained in pp
collisions at LHC.


title:
Bi-large Neutrino Mixing and Mass of the Lightest Neutrino from Third
  Generation Dominance in a Democratic Approach

abstract:
  We show that both small mixing in the quark sector and large mixing in the
lepton sector can be obtained from a simple assumption of universality of
Yukawa couplings and the right-handed neutrino Majorana mass matrix in leading
order. We discuss conditions under which bi-large mixing in the lepton sector
is achieved with a minimal amount of fine-tuning requirements for possible
models. From knowledge of the solar and atmospheric mixing angles we determine
the allowed values of sin \theta_{13}. If embedded into grand unified theories,
the third generation Yukawa coupling unification is a generic feature while
masses of the first two generations of charged fermions depend on small
perturbations. In the neutrino sector, the heavier two neutrinos are model
dependent, while the mass of the lightest neutrino in this approach does not
depend on perturbations in the leading order. The right-handed neutrino mass
scale can be identified with the GUT scale in which case the mass of the
lightest neutrino is given as (m_{top}^2/M_{GUT}) sin^2 \theta_{23} sin^2
\theta_{12} in the limit sin \theta_{13} = 0. Discussing symmetries we make a
connection with hierarchical models and show that the basis independent
characteristic of this scenario is a strong dominance of the third generation
right-handed neutrino, M_1, M_2 < 10^{-4} M_3, M_3 = M_{GUT}.


title:
Universal Texture of Quark and Lepton Mass Matrices with an Extended
  Flavor $2\leftrightarrow 3$ Symmetry

abstract:
  Against the conventional picture that the mass matrix forms in the quark
sectors will take somewhat different structures from those in the lepton
sectors, on the basis of an idea that all the mass matrices of quarks and
leptons have the same texture, a universal texture of quark and lepton mass
matrices is proposed by assuming a discrete symmetry Z_3 and an extended flavor
2\leftrightarrow 3 symmetry. The texture is described by three parameters
(including phase parameter). According to this ansatz, the neutrino masses and
mixings are investigated.


title:
Helicity amplitude method for two electron positron pairs
  photoproduction

abstract:
  We present the matrix element of gamma gamma ->4l process with four charge
particles in final state. The constructions are performed in frame of Standard
Model of electroweak interaction using the helicity amplitude method . Every
possible polarization state of initial and final particles are considered and
analyzed.


title: Symmetry Breaking in Extra Dimensions

abstract:
  In this thesis we analyze the problem of symmetry breaking in models with
extra dimensions compactified on orbifolds. In the first chapter we briefly
review the main symmetry breaking mechanisms peculiar of extra dimensions such
as the Scherk-Schwarz mechanism, the Hosotani mechanism and the orbifold
projection. In the second chapter we study the most general boundary conditions
for fields on the orbifold S^1/Z_2 and we apply them to gauge and SUSY
breaking. In the third chapter we focus on flavour symmetry and we present a
six dimensional toy model for two generations that can solve the fermion
hierarchy problem.


title: Confining fields in lattice SU(2)

abstract:
  We review some difficulties of the standard picture of confining fields which
are viewed usually as `mild', or quasiclassical field configurations. The
paradoxes are naturally resolved by recent lattice observations of selftuned
fluctuations which exhibit both ultraviolet and infrared scales. The
ultraviolet scale is provided by the lattice spacing and is manifested in the
non-Abelian action density associated with the fluctuations while the physical
scale is exhibited by their geometrical characteristics. The data might suggest
existence of a dual description of Yang-Mills theories on the fundamental
level.


title: tau -> (3 pions) nu_tau : Theory versus Experiment

abstract:
  We analyse tau -> (3 pions) nu_tau decays within the framework of the
resonance chiral theory of QCD. We have worked out the relevant Lagrangian that
describes the axial-vector current hadronization contributing to these
processes, and the new coupling constants that arise have been constrained by
imposing the asymptotic behaviour of the corresponding spectral function within
QCD. Hence we compare the theoretical framework with the experimental data,
obtaining a good quality fit from the ALEPH spectral function and branching
ratio. We also get values for the mass and on-shell width of the a_1(1260)
resonance, and provide the tau -> (3 pions) nu_tau structure functions that
have been measured by OPAL and CLEO-II finding an excellent agreement.


title: QCD condensates from tau-decay data: A functional approach

abstract:
  We study a functional method to extract the V-A condensate of dimension 6
from a comparison of tau-decay data with the asymptotic space-like QCD
prediction. Our result is in agreement within errors with that from
conventional analyses based on finite energy sum rules.


title: Exotic Baryons from the Chiral Quark Soliton Model

abstract:
  From the interpretation of the $\Theta^+(1540)$ and $\Xi_{3/2}(1862)$ baryons
as an excitation of the ``skyrmion liquid'' with SU(3) flavour symmetry
$\bar{10}$ we deduce a new series of baryons, $\Theta_1^{++}$, $\Theta_1^{+}$
and $\Theta_1^0$, situated at the top of the 27-plet of SU(3) flavour, with
hypercharge Y=2, isospin I=1 and spin $J=\frac32$. The $\Theta_1$ mass and
width are estimated from the chiral quark soliton model. We demonstrate that
the predicted mass, $m_{\Theta_1}=1599 \mathrm{MeV/c^2}$, and broad width are
in qualitative conflict with experiment which shows no structure in the total
$K^+p$ cross section near $P_\mathrm{lab}=585$ MeV/c. We also discuss
properties of other exotic baryons from the 27- and 35-plets.


title:
Proposed Search for $a^0_0(980)-f_0(980)$ Mixing in Polarization
  Phenomena

abstract:
  The $K^+$ and $K^0$ meson mass difference induces the mixing of the
$a^0_0(980)$ and $f_0(980)$ resonances, the amplitude of which, between the
$K^+K^-$ and $K^0\bar K^0$ thresholds, is large in magnitude, of the order of $
m_{K}\sqrt{m^2_{K^0}-m^2_{K^+}}\approx\sqrt\alpha m^2_K$, and possesses the
phase sharply varying by about 90$^\circ$. We suggest performing the polarized
target experiments on the reaction $\pi^-p\to\eta\pi^0n$ at high energy in
which the fact of the existence of $a^0_0(980)-f_0(980)$ mixing can be
unambiguously and very easily established through the presence of a strong jump
in the azimuthal asymmetry of the $\eta\pi^0$ $S$ wave production cross section
near the $K\bar K$ thresholds. The presented estimates of the polarization
effect to be expected in experiment are to a great extent model independent.


title: Dimensional Deconstruction and Neutrino Physics

abstract:
  We present a simple observation for neutrino mixings and masses which arises
naturally in dimensional deconstruction models. There are two essential
ingredients of such models: (i) the presence of a symmetry mediated by the link
fields which results in the neutrino mixings to be maximal; and (ii) a
deconstruction scale which for large values gives rise to a small neutrino
mass, similar in feature to the seesaw mechanism.


title: On the observability of pseudoscalar toponium at future hadron colliders

abstract:
  Possible existence of extra SM families and/or isosinglet E_6 quarks may
sufficiently decrease |V_tb| of CKM matrix so that toponia can be formed.
Production of pseudoscalar toponium at the LHC and VLHC has been considered.
The observability of eta_t->gamma+gamma signal is discussed.


title: Perspectives for the radiative return at meson factories

abstract:
  The measurement of the pion form factor and, more generally, of the cross
section for electron-positron annihilation into hadrons through the radiative
return has become an important task for high luminosity colliders such as the
Phi- or B-meson factories. This quantity is crucial for predictions of the
hadronic contributions to the anomalous magnetic moment of the muon, and to the
running of the electromagnetic coupling. But the radiative return opens the
possibility of many other physical applications. The physics potential of this
method at high luminosity meson factories is discussed, the last upgraded
version of the event generator PHOKHARA is presented, and future developments
are highlighted.


title: Hierarchy Problem and a new Bound State

abstract:
  Instead of solving the fine-tuning problems by some automatic method or by
cancelling the quadratic divergencies in the hierarchy problem by a symmetry
(such as SUSY), we rather propose to look for a unification of the different
fine-tuning problems. Our unified fine-tuning postulate is the so-called
Multiple Point Principle, according to which there exist many vacuum states
with approximately the same energy density (cosmological constant). Our main
point here is to suggest a scenario, using only the pure Standard Model, in
which an exponentially large ratio of the electroweak scale to the Planck scale
results. This huge scale ratio occurs due to the required degeneracy of three
suggested vacuum states. The scenario is built on the hypothesis that a bound
state formed from 6 top and 6 anti-top quarks, held together mainly by Higgs
particle exchange, is so strongly bound that it can become tachyonic and
condense in one of the three suggested vacua. If we live in this vacuum, the
new bound state would be seen via its mixing with the Higgs particle. It would
have essentially the same decay branching ratios as a Higgs particle of the
same mass, but the total lifetime and production rate would deviate from those
of a genuine Higgs particle. Possible effects on the rho parameter are
discussed.


title: Constraints on Natural MNS Parameters from |U_e3|

abstract:
  The MNS matrix structure emerging as a result of recent neutrino measurements
strongly suggests two large mixing angles (solar and atmospheric) and one small
angle (|U_e3| << 1). Especially when combined with the neutrino mass hierarchy,
these values turn out to impose rather stringent constraints on possible flavor
models connecting the three active fermion generations. Specifically, we show
that an extremely small value of |U_e3| would require fine tuning of Majorana
mass matrix parameters, particularly in the context of seesaw models.


title: The Problem of Mass

abstract:
  The quark-lepton mass problem and the ideas of mass protection are reviewed.
The Multiple Point Principle is introduced and used within the Standard Model
to predict the top quark and Higgs particle masses. We discuss the lightest
family mass generation model, in which all the quark mixing angles are
successfully expressed in terms of simple expressions involving quark mass
ratios. The chiral family flavour symmetry of the family replicated gauge group
model is shown to provide the mass protection needed to generate the
hierarchical structure of the quark-lepton mass matrices.


title: Space-Time Foam and Cosmic-Ray Interactions

abstract:
  It has been proposed that propagation of cosmic rays at extreme-energy may be
sensitive to Lorentz-violating metric fluctuations (``foam''). We investigate
the changes in interaction thresholds for cosmic-rays and gamma-rays
interacting on the CMB and IR backgrounds, for a class of stochastic models of
spacetime foam. The strength of the foam is characterized by the factor
(E/M_P)^a, where ``a'' is a phenomenological suppression parameter. We find
that there exists a critical value of ``a'' (dependent on the particular
reaction), below which the threshold energy can only be lowered, and above
which the threshold energy may be raised, but at most by a factor of two. Thus,
it does not appear possible in this class of models to extend cosmic-ray
spectra significantly beyond their classical absorption energies. However, the
lower thresholds resulting from foam may have signatures in the cosmic-ray
spectrum. We also find that cosmic-ray energies cannot exceed the fundamental
Planck scale, and so set a lower bound of 10^8 TeV on the context of this model
for the scale of gravity. Finally, we comment in the apparent non-conservation
of particle energy-momentum, and speculate on its re-emergence as dark energy
in the foamy vacuum.


title: Remarks on transient photon production in heavy ion collisions

abstract:
  In this note, we discuss the derivation of a formula that has been used in
the literature in order to compute the number of photons emitted by a hot or
dense system during a finite time. Our derivation is based on a variation of
the standard operator-based $S$-matrix approach. The shortcomings of this
formula are then emphasized, which leads to a negative conclusion concerning
the possibility of using it to predict transient effects for the photon rate.


title: New physics from ultrahigh energy cosmic rays

abstract:
  Observations of cosmic rays with energies above ~ 4 x 10^{10} GeV have
inspired several speculative suggestions concerning their origin. The crucial
question is whether or not the spectrum exhibits the expected `GZK cutoff' at
this energy -- concerning which there are presently contradictory results. If
there is indeed a cutoff, then the sources are cosmologically distant and
rather exotic in nature. If there is no cutoff then new physics is required.


title: Leptogenesis in the type III seesaw mechanism

abstract:
  It is shown that the type III seesaw mechanism proposed recently can have
certain advantages over the conventional (or type I) seesaw mechanism for
leptogenesis. In particular a resonant enhancement of leptogenesis via heavy
quasi-Dirac right-handed neutrino pairs can occur without a special flavor form
or "texture" of the mass matrices being assumed. Some of the requirements for
neutrino mixing and leptogenesis are effectively decoupled.


title: Ambiguities in the up quark mass

abstract:
  It has long been known that no physical singularity is encountered as up
quark mass is adjusted from small positive to negative values as long as all
other quarks remain massive. This is tied to an additive ambiguity in the
definition of the quark mass. This calls into question the acceptability of
attempts to solve the strong CP problem via a vanishing mass for the lightest
quark.


title:
Hadronic light-by-light scattering contribution to the muon anomalous
  magnetic moment revisited

abstract:
  We discuss hadronic light-by-light scattering contribution to the muon
anomalous magnetic moment a_\mu^{\rm lbl}, paying particular attention to the
consistent matching between the short- and the long-distance behavior of the
light-by-light scattering amplitude. We argue that the short-distance QCD
imposes strong constraints on this amplitude overlooked in previous analyses.
We find that accounting for these constraints leads to approximately 50 per
cent increase in the central value of a_\mu^{\rm lbl}, compared to existing
estimates. The hadronic light-by-light scattering contribution becomes
a_\mu^{\rm lbl}=136(25) \times 10^{-11}, thereby shifting the Standard Model
prediction closer to the experimental value.


title: Why does the Quark-Gluon Plasma at RHIC behave as a nearly ideal fluid ?

abstract:
  The lecture is a brief review of the following topics: (i) collective flow
phenomena in heavy ion collisions. The data from RHIC indicate robust
collective flows, well described by hydrodynamics with expected Equation of
State. The transport properties turned out to be unexpected, with very small
viscosity;
  (ii) physics of highly excited matter produced in heavy ion collisions at
T_c<T<4T_c is different from weakly coupled quark-gluon plasma because of
relatively strong coupling generating bound states of quasiparticles;
  (iii) wider discussion of other ``strongly coupled systems'' including
strongly coupled supersymmetric theories studied via Maldacena duality, as well
as recent progress in trapped atoms with very large scattering length.


title: Large tan beta SUSY QCD corrections to B -> X_s gamma

abstract:
  The charged-Higgs boson contributions to the Wilson coefficients C_7 and C_8,
relevant for the decay B -> X_s gamma, are discussed in supersymmetric models
at large tan beta. These contributions receive two-loop O(alpha_s tan beta)
corrections by squark-gluino subloops, which are possibly large and
nondecoupling in the limit of heavy superpartners. In previous studies, the
relevant two-loop Feynman integrals were approximated by using an effective
two-Higgs-doublet lagrangian. However, this approximation is theoretically
justified only when the typical supersymmetric scale M_SUSY is sufficiently
larger than the electroweak scale m_weak \sim (m_W,m_t) and the mass of the
charged-Higgs boson m_{H^\pm}. Here we evaluate these two-loop integrals
exactly and compare the results with the existing, approximated ones. We then
examine the validity of this approximation beyond the region where it has been
derived, i.e. for m_H \gtap M_SUSY and/or M_SUSY \sim m_weak.


title: Spin asymmetries in gamma + N --> K*bar + Theta^+

abstract:
  The photoproduction processes of the exotic $\Theta^+(1540)$ baryon and the
$\bar{K}^*$ meson from the nucleon targets, i.e., $\gamma n \to K^{*-}
\Theta^+$ and $\gamma p \to \bar{K}^{*0} \Theta^+$, are investigated in a
hadronic model. We consider $K$ and $K^*$ exchanges as well as the $s$ and $u$
channel nucleon and $\Theta$ terms. Various spin asymmetries together with
cross sections are first computed in order to study the production mechanisms
and the parity of the $\Theta^+(1540)$ baryon. Within the uncertainties arising
from the model-dependence of the production mechanisms and several coupling
constants, we find that some target-recoil double spin asymmetries, $C^{\rm
TR}_{xx'}$ and $C^{\rm TR}_{xz'}$, are sensitive to the parity of $\Theta^+$.
In addition, the parity asymmetry of this reaction on the neutron target, which
can be obtained by analyzing $K^*$ decay distribution, is found to be useful to
estimate the $K^* N \Theta$ coupling.


title: Can a Nonsymmetric Metric mimic NCQFT in $e^+e^- \to \gamma \gamma$ ?

abstract:
  In the nonsymmetric gravitational theory (NGT) the space-time metric
$g_{\mu\nu}$ departs from the flat-space Minkowski form $\eta_{\mu\nu}$ such
that it is no longer symmetric, $i.e.$ $g_{\mu\nu} \ne g_{\nu\mu}$. We find
that in the most conservative such scenario coupled to quantum field theory,
which we call Minimally Nonsymmetric Quantum Field Theory (MNQFT), there are
experimentally measurable consequences similar to those from noncommutative
quantum field theory (NCQFT). This can be expected from the Seiberg-Witten map
which has recently been interpreted as equating gauge theories on
noncommutative spacetimes with those in a field dependent gravitational
background. In particular, in scattering processes such as the pair
annihilation $e^+e^- \to \gamma\gamma$, both theories make the same striking
prediction that the azimuthal cross section oscillates in $\phi$. However the
predicted number of oscillations differs in the two theories: MNQFT predicts
between one and four, whereas NCQFT has no such restriction.


title: Double fermiophobic Higgs boson production at the LHC and LC

abstract:
  We consider the phenomenology of a fermiophobic Higgs boson (h_f) at the
Large Hadron Collider (LHC) and a e+e- Linear Collider (LC). At both machines
the standard production mechanisms which rely on the coupling h_fVV (V=W,Z) can
be very suppressed at large tan beta. In such cases the complementary channels
pp to H^\pm h_f, A^0 h_f and e+e- to A^0 h_f offer promising cross-sections.
Together with the potentially large branching ratios for H^\pm to h_fW* and A^0
to h_fZ*, these mechanisms would give rise to double h_f production, leading to
signatures of gamma gamma gamma gamma, gamma gamma VV and VVVV.


title: The difficulty in the decay constants and spectra of $D^{*}_{sJ}$

abstract:
  We examine the compatibility in predicted masses and the decay constants of
$D^{*}_{sJ}$ mesons in terms of two-quark contents. We find that the results of
a specific model, which is governed by heavy quark limit, will encounter a
challenge to fit both spectra and decay constants simultaneously.


title: Searches for New Particles

abstract:
  Searches for New Particles including future sensitivity prospects are
reviewed. The main focus is placed on results obtained at LEP, HERA and the
Tevatron on generic searches such as searches for excited fermions, searches
for leptoquarks and high-$p_T$ leptons. Also interpretations in the context of
anomalous single top production via flavour-changing neutral current, large
extra space dimensions, supersymmetry, and various searches for Higgs bosons
are discussed.


title: Anomaly mediated supersymmetry breaking and its test in linear colliders

abstract:
  Signatures of anomaly mediated supersymmetry breaking in linear colliders are
briefly reviewed after presenting an outline of the theoretical framework. A
unique and distinct feature of a large class of models of this type is a
winolike chargino which is very closely degenerate in mass with the lightest
neutralino. The very slow decay of this chargino results in a heavily ionizing
charged track and one soft charged pion with a characteristic momentum
distribution, leading to unique signals in linear colliders which are
essentially free of background. The determination of chargino and slepton
masses from such events is a distinctly interesting possibility.


title: Neutrino Physics and the flavour problem

abstract:
  We consider the problem of trying to understand the recently measured
neutrino data simultaneously with understanding the heirarchical form of quark
and charged lepton Yukawa matrices. We summarise the data that a sucessful
model of neutrino mass must predict, and then move on to attempting to do so in
the context of spontaneously broken `family' symmetries. We consider first an
abelian U(1) family symmetry, which appears in the context of a type I string
model. Then we consider a model based on a non-abelian SU(3)_F, which is the
maximal family group consitent with an SO(10) GUT. In this case the symmetry is
more constraining, and is examined in the context of SUSY field theory.


title: How to measure the parity of the $\Theta^+$ in $\vec p\vec p$ collisions

abstract:
  Triggered by a recent paper by Thomas, Hicks and Hosaka, we investigate which
observables can be used to determine the parity of the $\Theta^+$ from the
reaction $\vec p\vec p \to \Sigma^+\Theta^+$ near its production threshold. In
particular, we show that the sign of the spin correlation coefficient $A_{xx}$
for small excess energies yields the negative of the parity of the $\Theta^+$.
The argument relies solely on the Pauli principle and parity conservation and
is therefore model--independent.


title: Canonical normalisation and Yukawa matrices

abstract:
  We highlight the important role that canonical normalisation of kinetic terms
in flavour models based on family symmetries can play in determining the Yukawa
matrices. Even though the kinetic terms may be correctly canonically normalised
to begin with, they will inevitably be driven into a non-canonical form by a
similar operator expansion to that which determines the Yukawa operators.
Therefore in models based on family symmetry canonical re-normalisation is
mandatory before the physical Yukawa matrices can be extracted. In nearly all
examples in the literature this is not done. As an example we perform an
explicit calculation of such mixing associated with canonical normalisation of
the Kahler metric in a supersymmetric model based on SU(3) family symmetry,
where we show that such effects can significantly change the form of the Yukawa
matrix. In principle quark mixing could originate entirely from canonical
normalisation, with only diagonal Yukawa couplings before canonical
normalisation.


title: Formulation of Vector Manifestation in Hot and/or Dense Matter

abstract:
  The vector manifestation (VM) was proposed as a novel manifestation of chiral
symmetry in which the massless vector meson becomes the chiral partner of pion.
In this write-up, I briefly summarize the following main ingredients to
formulate the VM in hot and/or dense matter: Effective field theory (EFT) based
on the hidden local symmetry; Wilsonian matching between the EFT and QCD;
Intrinsic thermal and/or dense effects.


title: Recent Developments in Heavy Quark and Quarkonium Production

abstract:
  Recent measurements of J/psi production in e^+ e^- colliders pose a challenge
to the NRQCD factorization theorem for quarkonium production. Discrepancies
between leading order calculations of color-octet contributions and the
momentum distribution of J/psi observed by Belle and BaBar are resolved by
resumming large perturbative and nonperturbative corrections that are enhanced
near the kinematic endpoint. The large cross sections for J/psi + c + \bar c
and double quarkonium production remain poorly understood. Nonperturbative
effects in fixed-target hadroproduction of open charm are also discussed. Large
asymmetries in the production of charm mesons and baryons probe nonperturbative
corrections to the QCD factorization theorem. A power correction called
heavy-quark recombination can economically explain these asymmetries with a few
universal parameters.


title:
The tauola-photos-F environment for the TAUOLA and PHOTOS packages,
  release II

abstract:
  We present the system for versioning two packages: the TAUOLA of tau-lepton
decay and PHOTOS for radiative corrections in decays. The following features
can be chosen in an automatic or semi-automatic way: (1) format of the common
block HEPEVT; (2) version of the physics input (for TAUOLA): as published, as
initialized by the CLEO collaboration, as initialized by the ALEPH
collaboration (it is suggested to use this version only with the help of the
collaboration advice), new optional parametrizations of matrix elements in 4-pi
decay channels; (3) type of application: stand-alone, universal interface based
on the information stored in the HEPEVT common block including longitudinal
spin effects in the elementary Z/gamma* -> tau+ tau- process, extended version
of the standard universal interface including full spin effects in the H/A ->
tau+ tau- decay, interface for KKMC Monte Carlo, (4) random number generators;
(5) compiler options.


title: Lattice QCD at the end of 2003

abstract:
  I review recent developments in lattice QCD. I first give an overview of its
formalism, and then discuss lattice discretizations of fermions. We then turn
to a description of the quenched approximation and why it is disappearing as a
vehicle for QCD phenomenology. I describe recent claims for progress in
simulations which include dynamical fermions and the interesting theoretical
problems they raise. I conclude with brief descriptions of the calculations of
matrix elements in heavy flavor systems and for kaons.


title: Radiative Corrections and the Standard Model of Elementary Particles

abstract:
  This presentation includes an introductory discussion of the unification of
fundamental forces, properties of the elementary particles, Quantum
Electrodynamics, the transition from Quantum Electrodynamics and Weak
Interactions to Electroweak Physics, Radiative Corrections in the Standard
Model of Particle Physics, and some critical unsolved problems.


title: Eikonal representation in the momentum-transfer space

abstract:
  By means of empirical fits to the differential cross section data on pp and
p(bar)p elastic scattering, above 10 GeV (center-of-mass energy), we determine
the eikonal in the momentum - transfer space (q^2- space). We make use of a
numerical method and a novel semi-analytical method, through which the
uncertainties from the fit parameters can be propagated up to the eikonal in
the $q^2$- space. A systematic study of the effect of the experimental
information at large values of the momentum transfer is developed and discussed
in detail. We present statistical evidence that the imaginary part of the
eikonal changes sign in the q^2- space and that the position of the zero
decreases as the energy increases; after the position of the zero, the eikonal
presents a minimum and then goes to zero through negative values. We discuss
the applicability of our results in the phenomenological context, outlining
some connections with nonperturbative QCD. A short review and a critical
discussion on the main results concerning "model-independent" analyses are also
presented.


title: Degenerate neutrinos from a supersymmetric A_4 model

abstract:
  We investigate the supersymmetric A_4 model recently proposed by Babu, Ma and
Valle. The model naturally gives quasi-degenerate neutrinos that are bi-largely
mixed, in agreement with observations. Furthermore, the mixings in the quark
sector are constrained to be small, making it a complete model of the flavor
structure. Moreover, it has the interesting property that CP-violation in the
leptonic sector is maximal (unless vanishing). The model exhibit a close
relation between the slepton and lepton sectors and we derive the slepton
spectra that are compatible with neutrino data and the present bounds on
flavor-violating charged lepton decays. The prediction for the branching ratio
of the decay tau -> mu gamma has a lower limit of 10^{-9}. In addition, the
overall neutrino mass scale is constrained to be larger than 0.3 eV. Thus, the
model will be tested in the very near future.


title:
Asymmetrically warped compactifications and gravitational Lorentz
  violation

abstract:
  In a variant of the Randall-Sundrum braneworld model which has a charged
black hole in an anti-de Sitter bulk, the 4D speed of gravity depends upon
one's location in the bulk, and in general differs from the speed of light on a
given 3-brane. We apply phenomenological constraints on the difference in the
speeds of light and gravity to models which use the warping to solve the
hierarchy problem. In particular, consideration of the gravi-Cerenkov radiation
of Kaluza-Klein gravitons by ultra-high energy cosmic rays leads to a stringent
limit on the fractional difference between the graviton and photon speeds in
RS-like models: it must be less than a part in 10^{23}.


title: Degeneracy of consistency equations in braneworld inflation

abstract:
  In a Randall-Sundrum type II inflationary scenario we compute perturbation
amplitudes and spectral indices up to next-to-lowest order in the slow-roll
parameters, starting from the well-known lowest-order result for a de Sitter
brane. Using two different prescriptions for the tensor amplitude, we show that
the braneworld consistency equations are not degenerate with respect to the
standard relations and we explore their observational consequences. It is then
shown that, while the degeneracy between high- and low-energy regimes can come
from suitable values of the cosmological observables, exact functional matching
between consistency expressions is plausibly discarded. This result is then
extended to the Gauss-Bonnet case.


title:
Holographic Theories of Electroweak Symmetry Breaking without a Higgs
  Boson

abstract:
  Recently, realistic theories of electroweak symmetry breaking have been
constructed in which the electroweak symmetry is broken by boundary conditions
imposed at a boundary of higher dimensional spacetime. These theories have
equivalent 4D dual descriptions, in which the electroweak symmetry is
dynamically broken by non-trivial infrared dynamics of some gauge interaction,
whose coupling g and size N satisfy g^2N > 16pi^2. Such theories allow one to
calculate electroweak radiative corrections, including the oblique parameters
S, T and U, as long as g^2N/16pi^2 and N are large. We study how the duality
between the 4D and 5D theories manifests itself in the computation of various
physical quantities. In particular, we study a warped 5D theory where the
electroweak symmetry is broken by boundary conditions at the infrared brane. We
show that S exceeds the experimental bound if the minimal theory is in a weakly
coupled regime. This requires either an extension of the model or departure
from weak coupling. An interesting scenario is obtained if the gauge couplings
in the 5D theory take the largest possible values -- the value suggested by
naive dimensional analysis. We argue that such a theory can provide a
potentially consistent picture for dynamical electroweak symmetry breaking:
corrections to the electroweak observables are sufficiently small while
realistic fermion masses are obtained without conflicting with bounds from
flavor violation. The theory contains only the standard model quarks, leptons
and gauge bosons below \sim 2 TeV, except for a possible light radion. At \sim
2 TeV increasingly broad string resonances appear. An analysis of top-quark
phenomenology and flavor violation is also presented, which is applicable to
both the weakly-coupled and strongly-coupled cases.


title: Relating Incomplete Data and Incomplete Theory

abstract:
  Assuming string theorists will not soon provide a compelling case for the
primary theory underlying particle physics, the field will proceed as it has
historically: with data stimulating and testing ideas. Ideally the soft
supersymmetry breaking Lagrangian will be measured and its patterns will point
to the underlying theory. But there are two new problems. First a matter of
principle: the theory may be simplest at distance scales and in numbers of
dimensions where direct experiments are not possible. Second a practical
problem: in the foreseeable future (with mainly hadron collider data) too few
observables can be measured to lead to direct connections between experiment
and theory. In this paper we discuss and study these issues and consider ways
to circumvent the problems, studying models to test methods. We propose a
semi-quantitative method for focusing and sharpening thinking when trying to
relate incomplete data to incomplete theory, as will probably be necessary.


title: Uncertainties in limits on TeV-gravity from neutrino-induced showers

abstract:
  In models with TeV-scale gravity, ultrahigh energy cosmic rays can generate
microscopic black holes in the collision with atmospheric and terrestrial
nuclei. It has been proposed that stringent bounds on TeV-scale gravity can be
obtained from the absence of neutrino cosmic ray showers mediated by black
holes. However, uncertainties in the cross section of black hole formation and,
most importantly, large uncertainties in the neutrino flux affects these
bounds. As long as the cosmic neutrino flux remains unknown, the
non-observation of neutrino induced showers implies less stringent limits than
present collider limits.


title: Predictions for g-2 of the muon and alpha_QED(M_Z^2)

abstract:
  We calculate (g-2) of the muon and the QED coupling alpha(M_Z^2), by
improving the determination of the hadronic vacuum polarization contributions
and their uncertainties. We include the recently re-analysed CMD-2 data on
e^+e^- -> pi^+ pi^-. We carefully combine a wide variety of data for the e^+e^-
production of hadrons, and obtain the optimum form of R(s) =
sigma_had^0(s)/sigma_pt(s), together with its uncertainty. Our results for the
hadronic contributions to g-2 of the muon are a_mu^(had, LO) = (692.4 +-
5.9_exp +- 2.4_rad) * 10^(-10) and a_mu^(had, NLO) = (-9.8 +- 0.1_exp +-
0.0_rad) * 10^(-10), and for the QED coupling Delta alpha^(5)_had (M_Z^2)=
(275.5 +- 1.9_exp +- 1.3_rad) * 10^(-4). These yield (g-2)/2 =
0.00116591763(74), which is about 2.4 sigma below the present world average
measurement, and alpha(M_Z^2)^(-1) = 128.954 +- 0.031. We compare our (g-2)
value with other predictions and, in particular, make a detailed comparison
with the latest determination of (g-2) by Davier et al.


title: Exclusive two-charmonium vs. charmonium-glueball production at BELLE

abstract:
  We review the current theoretical situation with regard to the anomalously
large cross section for exclusive J/psi + eta_c production in e^+ e^-
annihilation, as measured by BELLE Collaboration.


title:
The jet quenching in high energy nuclear collisions and quark-gluon
  plasma

abstract:
  e investigate the energy loss of quark and gluon jets in quark-gluon plasma
produced in central Au+Au collisions at RHIC energy. We use the physical
characteristic of initial and mixed phases, which were found in effective
quasiparticle model for SPS and RHIC energy. At investigation of energy loss we
take into account also the production of hot glue at first stage. The energy
loss in expanding plasma is calculated in dominant first order of radiation
intensity with accounting of finite kinematic bounds. We calculate the
suppression of $\pi^0$ - spectra with moderate high $p_{\perp}$, which is
caused by energy loss of quark and gluon jets. The comparison with suppression
of $\pi^0$ reported by PHENIX show, that correct quantitative description of
suppression we have only in model of phase transition with decrease of thermal
gluon mass and effective coupling $G(T)$ in region of phase transition plasma
into hadrons (at $T \simeq T_c$). However quasiparticle model with increase of
these values at $T \to T_c$ in accordance with perturbative QCD lead to too
great energy loss of gluon and quark jets, which disagrees with data on
suppression of $\pi^0$. Thus it is possible with help of hard processes to
investigate the structure of phase transition. We show also, that energy losses
at SPS energy are too small in order to be observable. This is caused in fact
by sufficiently short plasma phase at this energy.


title:
ElectroWeak Symmetry Breaking as of 2003, on the way to the Large Hadron
  Collider

abstract:
  I review the status of the ElectroWeak Symmetry Breaking problem. The
lectures are naturally divided into two parts. The first is mostly devoted to
overview the impact of current data on the issue of EWSB. The tools are known,
the latest data are included. Always in the first part, I say why I care about
the "little hierarchy" problem and I summarize how some proposals for EWSB,
recent and less recent, are confronted with this problem. Motivated by these
considerations, in the second part I describe the essential features of a
proposal for breaking supersymmetry, and consequently the electroweak symmetry,
by boundary conditions on an extra dimension.


title: Analytic calculation of color-Coulomb potential and color confinement

abstract:
  We develop a calculational scheme in Coulomb and temporal gauge that respects
gauge invariance and is most easily applied to the infrared asymptotic region
of QCD. It resembles the Dyson-Schwinger equations of Euclidean quantum field
theory in Landau gauge, but is 3-dimensional. A simple calculation yields a
color-Coulomb potential that behaves at large $R$ approximately like $V_{\rm
coul}(R) \sim R^{[1-0.2(d-1)]}$ for spatial dimension $1 \leq d \leq 3$. This
is a linearly rising potential plus a rather weak dependence on $d$.


title:
Electromagnetic Form Factors of Hadrons in the Space- and Time-like
  Regions within a Constituent Quark Model on the Light Front

abstract:
  An approach for describing the electromagnetic form factors of hadrons, in
the space- and time-like regions, within a constituent quark model on the light
front is shortly illustrated and calculations for the pion case are reported.
Three main ingredients enter our approach: i) the dressed photon vertex where a
photon decays in a quark-antiquark pair, ii) the on-shell quark-hadron vertex
functions in the valence sector, and iii) the non-valence component of the
hadron state.


title: Fock States of Flavor Neutrinos are Unphysical

abstract:
  It is shown that it is possible to construct an infinity of Fock spaces of
flavor neutrinos depending on arbitrary unphysical mass parameters, in
agreement with the theory of Blasone and Vitiello in the version proposed by
Fujii, Habe and Yabuki. However, we show that these flavor neutrino Fock spaces
are clever mathematical constructs without physical relevance, because the
hypothesis that neutrinos produced or detected in charged-current weak
interaction processes are described by flavor neutrino Fock states implies that
measurable quantities depend on the arbitrary unphysical flavor neutrino mass
parameters.


title: Inflation and Leptogenesis in Five Dimensional SO(10)

abstract:
  We discuss five dimensional (5D) supersymmetric SO(10) compactified on the
orbifold $S^1/(Z_2\times Z_2')$ such that the SO(10) gauge symmetry is broken
on the fixed point(s) to its maximal subgroup(s). The MSSM gauge symmetry is
recovered by the usual Higgs mechanism, and inflation is associated with the
Higgs mechanism, implemented through F-term scalar potentials on the two fixed
points. The spontaneous breaking scale is fixed from $\delta T/T$ measurements
to be around $10^{16}$ GeV, and the scalar spectral index $n=0.98-0.99$. The
inflaton field decays into right-handed neutrinos whose subsequent out of
equilibrium decay yield the observed baryon asymmetry via leptogenesis.


title:
Soft gluon resummation in the quark-vector boson vertex at high energy:
  On-mass-shell case

abstract:
  Resummation of the soft gluon radiative corrections for the quark-vector
boson vertex is performed within the path-integral (world-line) approach. The
leading order expression for the vacuum averaged Wilson integral for an
arbitrary gauge field is found in n-dimensional space-time. The cusp anomalous
dimension of the color non-singlet Sudakov form factor of on-mass-shell quark
is calculated in an arbitrary covariant gauge in the one-loop order, and the
leading double-logarithmic asymptotical behavior is obtained from the
corresponding evolution equation.


title:
B -> pi pi, New Physics in B -> pi K and Implications for Rare K and B
  Decays

abstract:
  The measured B -> pi pi, pi K branching ratios exhibit puzzling patterns. We
point out that the B -> pi pi hierarchy can be nicely accommodated in the
Standard Model (SM) through non-factorizable hadronic interference effects,
whereas the B -> pi K system may indicate new physics (NP) in the electroweak
(EW) penguin sector. Using the B -> pi pi data and the SU(3) flavour symmetry,
we may fix the hadronic B -> pi K parameters, which allows us to show that any
currently observed feature of the B -> pi K system can be easily explained
through enhanced EW penguins with a large CP-violating NP phase. Restricting
ourselves to a specific scenario, where NP enters only through Z^0 penguins, we
derive links to rare K and B decays, where an enhancement of the K_L-> pi^0 nu
nu_bar rate by one order of magnitude, with BR(K_L -> pi^0 nu nu_bar) > BR(K^+
-> pi^+ nu nu_bar), BR(K_L -> pi^0 e^+ e^-)=O(10^{-10}), (\sin2\beta)_{pi nu
nu_bar}<0, and a large forward-backward CP asymmetry in B_d -> K* mu^+ mu^-,
are the most spectacular effects. We address also other rare K and B decays,
epsilon'/epsilon and B_d -> phi K_S.


title: Untagged B -> X_(s+d) gamma CP asymmetry as a probe for new physics

abstract:
  The direct CP asymmetry in the untagged inclusive channel B -> X_(s+d) gamma
provides a strict test of the standard model. It has been shown beyond the
partonic level that this asymmetry is negligibly small thanks to U-spin
relations and to the unitarity of the CKM matrix. In the present paper we
investigate this relation beyond the SM; in particular, we analyse to which
extent deviations from this prediction are possible in supersymmetric
scenarios. We analyse the minimal flavour violation scenario, including
tan(beta) enhanced terms and using the complete two-loop renormalization group
running. Our analysis fully takes into account also the EDM constraints on the
supersymmetric phases. We investigate possible correlations between the tagged
and the untagged CP asymmetries and the indirect sensitivity of the latter to
the B -> X_d gamma CP asymmetry.
  Furthermore, we derive general model-independent formulae for the branching
ratios and CP asymmetries for the inclusive B -> X_d gamma and B -> X_s gamma
modes, and update the corresponding SM predictions.


title: Saturation at Hadron Colliders

abstract:
  We extend the saturation models a la Golec-Biernat and Wusthoff to
cross-sections of hard processes initiated by virtual-gluon probes separated by
large rapidity intervals at hadron colliders. We derive their analytic
expressions and apply them to physical examples, such as saturation effects for
Mueller-Navelet forward jets. By comparison to gamma*-gamma* cross-sections we
find a more abrupt transition to saturation. We propose to study observables
with a potentially clear saturation signal and to use heavy vector and flavored
mesons as alternative hard probes to forward jets.


title: Gravitino Dark Matter in the CMSSM

abstract:
  We consider the possibility that the gravitino might be the lightest
supersymmetric particle (LSP) in the constrained minimal extension of the
Standard Model (CMSSM). In this case, the next-to-lightest supersymmetric
particle (NSP) would be unstable, with an abundance constrained by the
concordance between the observed light-element abundances and those calculated
on the basis of the baryon-to-entropy ratio determined using CMB data. We
modify and extend previous CMSSM relic neutralino calculations to evaluate the
NSP density, also in the case that the NSP is the lighter stau, and show that
the constraint from late NSP decays is respected only in a limited region of
the CMSSM parameter space. In this region, gravitinos might constitute the dark
matter.


title: Unitarity, BRST Symmetry and Ward Identities in Orbifold Gauge Theories

abstract:
  We discuss the use of BRST symmetry and the resulting Ward identities for
orbifold gauge theories as consistency checks in an arbitrary number of
dimensions. We verify that both the usual orbifold symmetry breaking and the
recently proposed Higgsless symmetry breaking are consistent with the
nilpotency of the BRST transformation. Imposing the Ward identities resulting
from the BRST symmetry on the 4-point functions of theory, we obtain relations
on the coupling constants that are shown to be equivalent to the conditions for
tree level unitarity. We present the complete set of these sum rules also for
inelastic scattering and discuss applications to 6-dimensional models and to
incomplete matter multiplets on orbifold fixed points.


title: Two-Loop SUSY Corrections to the Anomalous Magnetic Moment of the Muon

abstract:
  We calculate supersymmetric two-loop corrections to the anomalous magnetic
moment of the muon, consisting of diagrams with a closed scalar fermion or
fermion loop and gauge and/or Higgs boson exchange. We discuss the numerical
impact of each subclass of diagrams and determine the leading contributions. We
analyze in detail constraints from experimental information on the Higgs boson
mass, Delta(rho), and the branching ratios of B -> X_s gamma and B_s -> mu^+
mu^-. If these constraints are taken into account, the largest possible
contributions are reduced from more than 2 sigma (in terms of the current
experimental error) to ~0.3 sigma. The only exceptions arise in rather extreme
parameter scenarios with a strong non-universality between the soft breaking
parameters in the stop and sbottom sectors.


title:
Phenomenological Tests of Supersymmetric A_4 Family Symmetry Model of
  Neutrino Mass

abstract:
  Recently Babu, Ma and Valle proposed a model of quark and lepton mixing based
on $A_4$ symmetry. Within this model the lepton and slepton mixings are
intimately related. We perform a numerical study in order to derive the slepton
masses and mixings in agreement with present data from neutrino physics. We
show that, starting from three-fold degeneracy of the neutrino masses at a high
energy scale, a viable low energy neutrino mass matrix can indeed be obtained
in agreement with constraints on lepton flavour violating
  $\mu$ and $\tau$ decays. The resulting slepton spectrum must necessarily
include at least one mass below 200 GeV which can be produced at the LHC. The
predictions for the absolute Majorana neutrino mass scale $m_0 \geq 0.3$ eV
ensure that the model will be tested by future cosmological tests and
$\beta\beta_{0\nu}$ searches.
  Rates for lepton flavour violating processes
  $\ell_j \to \ell_i + \gamma$ in the range of sensitivity of current
experiments are typical in the model, with BR$(\mu \to e \gamma) \gsim
10^{-15}$ and the lower bound BR$(\tau \to \mu \gamma) > 10^{-9}$. To first
approximation, the model leads to maximal leptonic CP violation in neutrino
oscillations.


title:
High-precision QCD at hadron colliders: electroweak gauge boson rapidity
  distributions at NNLO

abstract:
  We compute the rapidity distributions of W and Z bosons produced at the
Tevatron and the LHC through next-to-next-to leading order in QCD. Our results
demonstrate remarkable stability with respect to variations of the
factorization and renormalization scales for all values of rapidity accessible
in current and future experiments. These processes are therefore
``gold-plated'': current theoretical knowledge yields QCD predictions accurate
to better than one percent. These results strengthen the proposal to use W and
Z production to determine parton-parton luminosities and constrain parton
distribution functions at the LHC. For example, LHC data should easily be able
to distinguish the central parton distribution fit obtained by MRST from that
obtained by Alekhin.


title: CMB Signals of Neutrino Mass Generation

abstract:
  We propose signals in the cosmic microwave background to probe the type and
spectrum of neutrino masses. In theories that have spontaneous breaking of
approximate lepton flavor symmetries at or below the weak scale, light
pseudo-Goldstone bosons recouple to the cosmic neutrinos after nucleosynthesis
and affect the acoustic oscillations of the electron-photon fluid during the eV
era. Deviations from the Standard Model are predicted for both the total energy
density in radiation during this epoch, \Delta N_nu, and for the multipole of
the n'th CMB peak at large n, \Delta l_n. The latter signal is difficult to
reproduce other than by scattering of the known neutrinos, and is therefore an
ideal test of our class of theories. In many models, the large shift, \Delta
l_n \approx 8 n_S, depends on the number of neutrino species that scatter via
the pseudo-Goldstone boson interaction. This interaction is proportional to the
neutrino masses, so that the signal reflects the neutrino spectrum. The
prediction for \Delta N_nu is highly model dependent, but can be accurately
computed within any given model. It is very sensitive to the number of
pseudo-Goldstone bosons, and therefore to the underlying symmetries of the
leptons, and is typically in the region of 0.03 < \Delta N_nu < 1. This signal
is significantly larger for Majorana neutrinos than for Dirac neutrinos, and,
like the scattering signal, varies as the spectrum of neutrinos is changed from
hierarchical to inverse hierarchical to degenerate.


title: Higgs Coupling Measurements at a 1 TeV Linear Collider

abstract:
  Methods for extracting Higgs boson signals at a 1 TeV center-of-mass energy
e+e- linear collider are described. In addition, estimates are given for the
accuracy with which branching fractions can be measured for Higgs boson decays
to bb, WW, gluon-gluon, and gamma-gamma.


title: Exotic states of matter in heavy meson decays

abstract:
  The potential of decays of mesons containing heavy quarks [including $B$
mesons and the $\Upsilon(1S)$] for producing final states of matter with
unusual quark configurations, such as $q q \bar q \bar q$ or $q q q q \bar q$,
is investigated. The usefulness of antineutron detection in such searches is
stressed.


title: Present status of our knowledge of |V_{cb}|

abstract:
  The Cabibbo-Kobayashi-Maskawa parameter $|V_{cb}|$ plays an important role
among the experimental constraints of the Yukawa sector of the Standard Model.
The present status of our knowledge will be summarized with particular emphasis
to the interplay between theoretical and experimental advances needed to
improve upon present uncertainties.


title: Recombination of shower partons in fragmentation processes

abstract:
  We develop the notion of shower partons and determine their distributions in
jets in the framework of the recombination model. The shower parton
distributions obtained render a good fit of the fragmentation functions. We
then illustrate the usefulness of the distributions in a problem where a jet is
produced in the environment of thermal partons as in heavy-ion collisions. The
recombination of shower and thermal partons is shown to be more important than
fragmentation. Application to the study of two-particle correlation in a jet is
also carried out.


title: Gluon Quasiparticles and the Polyakov Loop

abstract:
  A synthesis of Polyakov loop models of the deconfinement transition and
quasiparticle models of gluon plasma thermodynamics leads to a class of models
in which gluon quasiparticles move in a non-trivial Polyakov loop background.
These models are successful candidates for explaining both critical behavior
and the equation of state for the SU(3) gauge theory at temperatures above the
deconfinement temperature T_c. Polyakov loops effects are most important at
intermediate temperatures from T_c up to roughly 2.5 T_c, while quasiparticle
mass effects provide the dominant correction to blackbody behavior at higher
temperatures.


title: DPEMC : A Monte-Carlo for Double Diffraction

abstract:
  We extend the POMWIG Monte Carlo generator developed by B.Cox and J.Forshaw,
to include new models of central production through inclusive and exclusive
Double Pomeron Exchange in proton-proton collisions. Double photon Exchange
processes are described as well, both in proton-proton and heavy-ion
collisions. In all contexts, various models have been implemented, allowing for
comparisons and uncertainty evaluation and enabling detailed experimental
simulations.


title: Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA

abstract:
  We report on our exploration of matching matrix element calculations with the
parton-shower models contained in the event generators HERWIG and Pythia. We
describe results for e+e- collisions and for the hadroproduction of W bosons
and Drell--Yan pairs. We compare methods based on (1) a strict implementation
of ideas proposed by Catani, et al., (2) a generalization based on using the
internal Sudakov form factors of HERWIG and Pythia, and (3) a simpler proposal
of M. Mangano. Where appropriate, we show the dependence on various choices of
scales and clustering that do not affect the soft and collinear limits of the
predictions, but have phenomenological implications. Finally, we comment on how
to use these results to state systematic errors on the theoretical predictions.


title: Cold asymmetrical fermion superfluids

abstract:
  In this work we investigate the general properties and the ground state of an
asymmetrical dilute gas of cold fermionic atoms, formed by two particle species
having different densities. We have show in a recent paper, that a mixed phase
composed of normal and superfluid components is the energetically favored
ground state of such a cold fermionic system. Here we extend the analysis and
verify that in fact, the mixed phase is the preferred ground state of an
asymmetrical superfluid in various situatiations. We predict that the mixed
phase can serve as a way of detecting superfluidity and estimating the
magnitude of the gap parameter in asymmetrical fermionic systems.


title: The $a_0K^+K^-$-vertex in light cone QCD sum rules

abstract:
  We investigate the $a_0K^+K^-$-vertex in the framework of light cone QCD sum
rules. We estimate the coupling constant g$_{a_0K^+K^-}$ which is an essential
ingredient in the analysis of physical processes involving $a_0(980)$ meson.
Our result is somewhat larger than the previous determinations of this coupling
constant.


title: Linking the Quark Meson Model with QCD at High Temperature

abstract:
  We model the transition of a system of quarks and gluons at high energies to
a system of quarks and mesons at low energies in a consistent renormalization
group approach. Flow equations interpolate between the physics of the
high-temperature degrees of freedom and the low-temperature dynamics at a scale
of 1 GeV. We also discuss the dependence of the equation of state on baryon
density and compare our results with recent lattice gauge simulations.


title: Dynamics and freeze-out of hadron resonances at RHIC

abstract:
  Yields, rapidity and transverse momentum spectra of $\Delta^{++}(1232)$,
$\Lambda(1520)$, $\Sigma^\pm(1385)$ and the meson resonances $K^0(892)$,
$\Phi$, $\rho^0$ and $f_0(980)$ are predicted. Hadronic rescattering leads to a
suppression of reconstructable resonances, especially at low $p_\perp$. A mass
shift of the $\rho$ of 10 MeV is obtained from the microscopic simulation, due
to late stage $\rho$ formation in the cooling pion gas.


title: Pomeron Physics and QCD

abstract:
  We review some theoretical ideas concerning diffractive processes. We discuss
the Regge Ansatz for the pomeron and the two pomeron model. Then we present the
results obtained from nonperturbative QCD for high energy scattering. There we
can extract from elastic scattering data the parameters describing the QCD
vacuum, in particular the string tension.


title: Plane waves and wave packets in particle oscillations

abstract:
  Manipulation with ill-defined notions creates an illusion of a simple
derivation of the standard phase of neutrino oscillations in hep-ph/0311241 and
hep-ph/0312180.


title: Physics Potential of Solar Neutrino Experiments

abstract:
  We discuss the physics potential of the solar neutrino experiments i) To
explore the parameter space of neutrino mass and mixings; ii) To probe the
physics of the Sun; iii) To explore nuclear physics of the neutrino-target
interactions. Examples are given for these three classes.


title: Magnetic Moments of Baryons with a Single Heavy Quark

abstract:
  We calculate the magnetic moments of heavy baryons with a single heavy quark
in the bound-state approach. In this approach the heavy baryons is considered
as a heavy meson bound in the field of a light baryon. The light baryon field
is represented as a soliton excitation of the light pseudoscalar and vector
meson fields. For these calculations we adopt a model that is both chirally
invariant and consistent with the heavy quark spin symmetry. We gauge the model
action with respect to photon field in order to extract the electromagnetic
current operator and obtain the magnetic moments by computing pertinent matrix
elements of this operator between the bound state wavefunctions. We compare our
predictions for the magnetic moments with results of alternative approaches for
the description of heavy baryon properties.


title: Event shapes in e+e- annihilation and deep inelastic scattering

abstract:
  This article reviews the status of event-shape studies in e+e- annihilation
and DIS. It includes discussions of perturbative calculations, of various
approaches to modelling hadronisation and of comparisons to data.


title:
Exploring the Gauge Hierarchy Problem at N = 2 with TeV^-1 -sized Black
  Holes

abstract:
  A mass Hierarchy of magnitude O(10^16) GeV separates the gravitational and
electroweak interactions. Traditional proposed resolutions of this anomaly have
included supersymmetric theories (most notably, the MSSM and ESSM) and string
theory. However, energiers at which supersymmetric particles are expected to
appear are not accessible to experiment, and string theory is only testable at
around M_pl. A novel idea involves introducing extra dimensions into a
Minkowski space-time to reduce the effective separation between the gauge and
gravitational couplings. Theoretical developments of the so-called
Arkani-Dinopolous-Dvali (ADD) extra-dimensional scenario, and its experimental
verification, are presented here.


title: Simple Model for (3+2) Neutrino Oscillations

abstract:
  We formulate a set of naturalness criteria for sterile neutrinos (\nu') to be
light, needed for reconciling the LSND neutrino anomaly with the other neutrino
data. A light sterile neutrino becomes as natural as the light active neutrinos
if it carries quantum numbers of a chiral gauge symmetry broken at the TeV
scale. The simplest such theory is shown to be an SU(2) gauge theory with the
\nu' transforming as a spin 3/2 multiplet. We develop this model and show that
it leads naturally to the phenomenologically viable (3+2) neutrino oscillation
scheme. We also present next-to-minimal models for light sterile neutrinos
based on a chiral U(1) gauge symmetry.


title: Associated Production of a Top Quark and a Charged Higgs Boson

abstract:
  We compute the inclusive and differential cross sections for the associated
production of a top quark along with a charged Higgs boson at hadron colliders
to next-to-leading order (NLO) in perturbative quantum chromodynamics (QCD) and
in supersymmetric QCD. For small Higgs boson masses we include top quark pair
production diagrams with subsequent top quark decay into a bottom quark and a
charged Higgs boson. We compare the NLO differential cross sections obtained in
the bottom parton picture with those for the gluon-initiated production process
and find good agreement. The effects of supersymmetric loop contributions are
explored. Only the corrections to the Yukawa coupling are sizable in the
potential discovery region at the CERN Large Hadron Collider (LHC). All
expressions and numerical results are fully differential, permitting selections
on the momenta of both the top quark and the charged Higgs boson.


title: A Composite Little Higgs Model

abstract:
  We describe a natural UV complete theory with a composite little Higgs. Below
a TeV we have the minimal Standard Model with a light Higgs, and an extra
neutral scalar. At the TeV scale there are additional scalars, gauge bosons,
and vector-like charge 2/3 quarks, whose couplings to the Higgs greatly reduce
the UV sensitivity of the Higgs potential. Stabilization of the Higgs mass
squared parameter, without finetuning, occurs due to a softly broken shift
symmetry--the Higgs is a pseudo Nambu-Goldstone boson. Above the 10 TeV scale
the theory has new strongly coupled interactions. A perturbatively
renormalizable UV completion, with softly broken supersymmetry at 10 TeV is
explicitly worked out. Our theory contains new particles which are odd under an
exact "dark matter parity", (-1)^{(2S+3B+L)}. We argue that such a parity is
likely to be a feature of many theories of new TeV scale physics. The lightest
parity odd particle, or "LPOP", is most likely a neutral fermion, and may make
a good dark matter candidate, with similar experimental signatures to the
neutralino of the MSSM. We give a general effective field theory analysis of
the calculation of corrections to precision electroweak observables.


title:
Evaluation of the Higher Twist Contribution to the Moments of Proton
  Structure Functions F2 and g1

abstract:
  We performed the measurement of the inclusive electron scattering off the
proton in the resonance region (W<2.5 GeV) at momentum transfer Q2 below 4.5
(GeV/c)^2 with the CLAS detector. The large acceptance of CLAS provided an
access to a large, continuous two-dimensional kinematic domain in Q2 and x,
allowing therefore an integration of the data at fixed Q2 over x-interval. The
covered x-interval at each measured Q2 value is sufficient for an evaluation of
the higher moments (n>2). From these data we extracted the structure function
F2 and, by including other world data, we studied the Q2 evolution of its
moments, Mn(Q2), in order to estimate the higher twist contributions. A similar
experiment with polarized proton target is completed at CLAS. These new data
allow an accurate determination of higher moments of the proton structure
function g1. A preliminary phenomenological analysis indicates an excess of the
higher twist contribution in the spin-dependent structure function with respect
to the spin-independent one.


title: Scalar model of the glueball

abstract:
  A scalar model of the glueball is offered. The model is based on the
nonperturbative calculation of 2 and 4-points Green's functions. Approximately
they can be expressed via a scalar field. On the basis of the SU(3) Yang-Mills
Lagrangian an effective Lagrangian for the scalar field is derived. The
corresponding field equations are solved for the spherically symmetric case.
The obtained solution is interpreted as a bubble of the SU(3) quantized gauge
field.


title: Solution to the non-perturbative renormalization of gauge theory

abstract:
  The long standing problem of a non-perturbative renormalization of a gauge
field theoretical Hamiltonian is addressed and explicitly carried out within an
(effective) light-cone Hamiltonian approach to QCD. The procedure is in line
with the conventional ideas: The Hamiltonian is first regulated by suitable
cut-off functions, and subsequently renormalized by suitable counter terms to
make it cut-off independent. Emphasized is the considerable freedom in the
cut-off function which eventually can modify the Coulomb potential of two
charges at sufficiently small distances. The approach provides new physical
insight into the nature of gauge theory and the potential energy of QCD and QED
at short distance.


title: Dynamical symmetry breaking on a brane with bulk gauge theory

abstract:
  We analyze a structure of dynamical chiral symmetry breaking in orbifold
gauge theories with matter fields (fermions) on the fixed point. We find that
the boundary chiral phase structure of QED and QCD on the orbifold is quite
nontrivial depending on the bulk constitution, and we claim that particular
attention should be given to the dynamically generated masses in various kinds
of phenomenological orbifold models.


title:
Quantum Mechanics of Neutrino Detectors Determine Coherence and Phases
  in Oscillation Experiments

abstract:
  The apparent symmetry between energy and momentum found in all covariant
descriptions of neutrino oscillations is destroyed in the neutrino detector, a
quantum mechanical system described by a density matrix diagonal in energy but
not in momentum. The off diagonal matrix elements between states of different
momenta and the same energy produce the coherence and interference between mass
eigenstates having the same energy and different momenta that produce
oscillations.


title:
Measurement of the Generalized Polarizabilities of the Proton in Virtual
  Scattering at Q2=0.92 and 1.76 GeV2: I. Low Energy Expansion Analysis

abstract:
  Virtual Compton Scattering is studied at the Thomas Jefferson National
Accelerator Facility at low Center-of-Mass energies, below pion threshold.
Following the Low Energy Theorem for the $ ep \to ep \gamma$ process, we obtain
values for the two structure functions Pll-Ptt/epsilon and Plt at four-momentum
transfer squared Q2=0.92 and 1.76 GeV2.


title:
Measurement of the Generalized Polarizabilities of the Proton in Virtual
  Compton Scattering at Q2=0.92 and 1.76 Gev2: II. Dispersion Relation Analysis

abstract:
  Virtual Compton Scattering is studied at the Thomas Jefferson National
Accelerator Facility in the energy domain below pion threshold and in the
Delta(1232) resonance region. The data analysis is based on the Dispersion
Relation (DR) approach. The electric and magnetic Generalized Polarizabilities
(GPs) of the proton and the structure functions Pll-Ptt/epsilon and Plt are
determined at four-momentum transfer squared Q2=0.92 and 1.76 GeV2. The DR
analysis is consistent with the low-energy expansion analysis. The world data
set indicates that neither the electric nor magnetic GP follows a simple dipole
form.


title:
Propagation of tau neutrinos and tau leptons through the Earth and their
  detection in underwater/ice neutrino telescopes

abstract:
  If muon neutrinos produced in cosmological sources oscillate, neutrino
telescopes can have a chance to detect tau-neutrinos. In contrast to muon
neutrinos the Earth is completely transparent for tau neutrinos thanks to the
short life time of tau-leptons produced in charged current interactions.
Tau-lepton decaysin flight producing another tau neutrino (regeneration chain).
Thus, tau neutrinos cross the Earth without being absorbed, though loosing
energy both in regeneration processes and in neutral current interactions.
Neutrinos of all flavors can be detected in deep underwater/ice detectors by
means of Cherenkov light emitted by charged leptons produced in neutrino
interactions. Muon and tau-leptons have different energy loss features, which
provide opportunities to identify tau-events among the multitude of muons. Some
signatures of tau-leptons that can be firmly established and are background
free have been proposed in literature, such as 'double bang' events. In this
paper we present results of Monte Carlo simulations of tau-neutrino propagation
through the Earth accounting for neutrino interactions, tau energy losses and
tau decays. Parameterizations for hard part and corrections to the soft part of
the photonuclear cross-section (which contributes a major part to tau energy
losses) are presented. Different methods of tau-lepton identification in large
underwater/ice neutrino telescopes are discussed. Finally, we present a
calculation of tau neutrino double bang event rates in cubic km scale
detectors.


title:
Antineutrino Spectrum of the Earth and the Problem of Oscillating
  Geoantineutrino Deficit

abstract:
  The estimations of integral intensity and energy spectrum of geoantineutrino
on the Earth's surface (in the absence of oscillations) from different
radioactive sources (U, Th and K) are obtained on the basis of temporal
evolution analysis of radiogenic heat-evolution power of the Earth w4thin the
framework of model of geochemical processes of mantle differentiation and
earth's crust growth.


title: Mixed Phase in Compact Starts : M-R relations and radial oscillations

abstract:
  It is believed that quark stars or neutron stars with mixed phase in the core
have smaller radii compared to ordinary compact stars. With the recent
observation of several low radius objects, typically a radius of $<10 Km.$ for
star of mass $< 1M_0$ in low mass X-ray binaries (LMXB), it has become very
important to understand the nature of these objects. An accurate determination
of mass-radius relationship of these objects provide us with a physical
laboratory to study the composition of high density matter and the nature of
phase transition. We study the effect of quark and nuclear matter mixed phase
on mass radius relationship and radial oscillations of neutron stars. We find
that the effect of the mixed phase is to decrease the maximum mass of a stable
neutron star and to decrease the radial frequencies .


title: Fine and hyperfine interaction on the light cone

abstract:
  The formalism for the spin interactions in the front form (light-cone) is
re-phrased in terms of an instant form formalism. It is shown how to unitarily
transform the Brodsky-Lepage spinors to Bj{\o}rken-Drell spinors and to
re-phrase the so called spinor matrix in terms of the interactions one is
familiar with from atomic and Dirac theory. -- One retrieves the (relativistic)
kinetic correction, the hyperfine and the Darwin term which acts even when wave
function is spherically symmetric. One also retrieves angular momentum
dependent terms like the spin-orbit interaction in a relativistically correct
way; and one obtains additional terms which thus far have not been reported
particularly various $\vec L^2$-dependent terms. Since the approach includes
the full retardation, one gets additional, thus far unknown terms. The differ
from atomic and Dirac theory, since there only that part of the vector
potential is usually included which is generated by the atomic nucleus. Quite
on purpose, the paper is kept formal.


title: A linear potential in a light cone QCD inspired model

abstract:
  The general equation from previous work is specialized to a linear potential
$V(r)=-a+F r$ acting in the space of spherically symmetric S wave functions.
The fine and hyperfine interaction creates then a $\frac1r$-dependence in the
effective potential energy equation and a position dependent mass $\widetilde
m(r)$ in the effective kinetic energy of the associated Schr\"odinger equation.
The results are compared with the available experimental and theoretical
spectral data on the $\pi$ and $\rho$. Solving the eigenvalue problem within
the analytically tractable Airy-function approach induces a certain amount of
arbitrariness (fudge factors). Despite of this, the agreement with experimental
data is good and partially better than other calculations, including Godfrey
and Isgur \cite{GodIsg85} and Baldicchi and Prosperi \cite{BalPro02}. The short
comings of the present model can be removed easily in more elaborate work.


title: A quadratic potential in a light cone QCD inspired model

abstract:
  The general equation from previous work is specialized to a quadratic
potential $V(r)=-a+\frac12 f r^2$ acting in the space of spherically symmetric
S wave functions. The fine and hyperfine interaction creates then a position
dependent mass $\widetilde m(r)$ in the effective kinetic energy of the
associated Schr\"odinger equation. The results are compared with the available
experimental and theoretical spectral data on the $\pi$ and $\rho$. Solving the
eigenvalue problem within the usual oscillator approach induces a certain
amount of arbitrariness. Despite of this, the agreement with experimental data
is within the experimental error and better than other calculations, including
Godfrey and Isgur \cite{GodIsg85} and Baldicchi and Prosperi \cite{BalPro02}.
The short coming can be removed easily in more elaborate work.


title:
The ppbar -> tbH^+/- Process at the Tevatron in HERWIG and PYTHIA
  Simulations

abstract:
  Charged Higgs boson production in association with a top quark could be the
first indication of the existence of Higgs particles. The Tevatron Run-II
started data-taking in April 2001 at a centre-of-mass energy of 1960 GeV and
could probe the existence of a charged Higgs boson beyond the current mass
limit. We study the ppbar -> tbH^+/- production process with Monte Carlo
simulations in HERWIG and PYTHIA, comparing expected cross sections and basic
selection variables.


title: Infrared regulators and SCETII

abstract:
  We consider matching from SCETI, which includes ultrasoft and collinear
particles, onto SCETII with soft and collinear particles at one loop. Keeping
the external fermions off their mass shell does not regulate all IR divergences
in both theories. We give a new prescription to regulate infrared divergences
in SCET. Using this regulator, we show that soft and collinear modes in SCETII
are sufficient to reproduce all the infrared divergences of SCETI. We explain
the relationship between IR regulators and an additional mode proposed for
SCETII.


title:
CKM Phenomenology and B-Meson Physics - Present Status and Current
  Issues

abstract:
  We review the status of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements
and the CP-violating phases in the CKM-unitarity triangle. The emphasis in
these lecture notes is on $B$-meson physics, though we also review the current
status and issues in the light quark sector of this matrix. Selected
applications of theoretical methods in QCD used in the interpretation of data
are given and some of the issues restricting theoretical precision on the CKM
matrix elements discussed. The overall consistency of the CKM theory with the
available data in flavour physics is impressive and we quantify this
consistency. Current data also show some anomalies which, however, are not yet
statistically significant. They are discussed briefly. Some benchmark
measurements that remain to be done in experiments at the $B$-factories and
hadron colliders are listed. Together with the already achieved results, they
will provide unprecedented tests of the CKM theory and by the same token may
lead to the discovery of new physics.


title: Axial Vector Current Matrix Elements and QCD Sum Rules

abstract:
  The matrix element of the isoscalar axial vector current,
$\bar{u}\gamma_\mu\gamma_5u + \bar{d}\gamma_\mu\gamma_5d $, between nucleon
states is computed using the external field QCD sum rule method. The external
field induced correlator, $<0|\bar{q}\gamma_\mu\gamma_5q|0>$, is calculated
from the spectrum of the isoscalar axial vector meson states. Since it is
difficult to ascertain, from QCD sum rule for hyperons, the accuracy of
validity of flavour SU(3) symmetry in hyperon decays when strange quark mass is
taken into account, we rely on the empirical validity of Cabbibo theory to
dertermine the matrix element $\bar{u}\gamma_{\mu}\gamma_5 u +
\bar{d}\gamma_{\mu}\gamma_5 d - 2 \bar{s}\gamma_{\mu}\gamma_5 s$ between
nucleon states. Combining with our calculation of $\bar{u}\gamma_{\mu}\gamma_5
u + \bar{d}\gamma_{\mu}\gamma_5 d$ and the well known nucleon $\beta$-decay
constant allows us to determine $< p,s| {4/9}\bar{u}\gamma_{\mu}\gamma_5 u +
{1/9}\bar{d}\gamma_{\mu}\gamma_5 d + {1/9}\bar{s}\gamma_{\mu}\gamma_5 s |p, s>$
occuring in the Bjorken sum rule. The result is in reasonable agreement with
experiment. We also discuss the role of the anomaly in maintaining flavour
symmetry and validity of OZI rule.


title:
First-order cosmological phase transitions in the radiation dominated
  era

abstract:
  We consider first-order phase transitions of the Universe in the
radiation-dominated era. We argue that in general the velocity of interfaces is
non-relativistic due to the interaction with the plasma and the release of
latent heat. We study the general evolution of such slow phase transitions,
which comprise essentially a short reheating stage and a longer phase
equilibrium stage. We perform a completely analytical description of both
stages. Some rough approximations are needed for the first stage, due to the
non-trivial relations between the quantities that determine the variation of
temperature with time. The second stage, instead, is considerably simplified by
the fact that it develops at a constant temperature, close to the critical one.
Indeed, in this case the equations can be solved exactly, including
back-reaction on the expansion of the Universe. This treatment also applies to
phase transitions mediated by impurities. We also investigate the relations
between the different parameters that govern the characteristics of the phase
transition and its cosmological consequences, and discuss the dependence of
these parameters with the particle content of the theory.


title: Impact of CP phases on SUSY particle production and decays

abstract:
  We report on the results of a phenomenological study of top squarks
(stop_{1,2}) and bottom squarks (sbottom_{1,2}) in the Minimal Supersymmetric
Standard Model (MSSM) with complex parameters A_t, A_b, mu and M_1. In
particular we focus on the CP phase dependence of the branching ratios of
stop_{1,2} and sbottom_{1,2} decays. We find that the effect of the phases on
the stop_{1,2} and sbottom_{1,2} decays can be quite significant in a large
region of the MSSM parameter space. We also study a CP asymmetry in sfermion
decays.


title: Two loop renormalization of the magnetic coupling in hot QCD

abstract:
  Well above the critical temperature hot QCD is described by 3d electrostatic
QCD with gauge coupling $g_E$ and Debye mass $m_E$. We integrate out the Debye
scales to two loop accuracy and find for the gauge coupling in the resulting
magnetostatic action $g_M^2=g_E^2(1-{1\over{48}}{g_E^2N\over{\pi m_E}}
-{17\over{4608}}({g_E^2N\over{\pi m_E}})^2+O(({g_E^2N\over{\pi m_E}})^3))$.


title:
Static quantities of the W boson in the SU_L(3) X U_X(1) model with
  right-handed neutrinos

abstract:
  The static electromagnetic properties of the $W$ boson, $\Delta \kappa$ and
$\Delta Q$, are calculated in the $SU_L(3)} \times U_X(1)$ model with
right-handed neutrinos. The new contributions from this model arise from the
gauge and scalar sectors. In the gauge sector there is a new contribution from
a complex neutral gauge boson $Y^0$ and a singly-charged gauge boson $Y^\pm$.
The mass of these gauge bosons, called bileptons, is expected to be in the
range of a few hundreds of GeV according to the current bounds from
experimental data. If the bilepton masses are of the order of 200 GeV, the size
of their contribution is similar to that obtained in other weakly coupled
theories. However the contributions to both $\Delta Q$ and $\Delta \kappa$ are
negligible for very heavy or degenerate bileptons. As for the scalar sector, an
scenario is examined in which the contribution to the $W$ form factors is
identical to that of a two-Higgs-doublet model. It is found that this sector
would not give large corrections to $\Delta \kappa$ and $\Delta Q$.


title: Flavour and CP Violation in the Lepton Sector and New Physics

abstract:
  We give a pedagogical review of flavour and CP violation in the lepton
sector, with a particular emphasis on new physics - and in particular
supersymmetric - contributions to flavour and CP violating observables
involving leptons.


title: Multiple Interactions in Low x DIS and High Energy pp Collisions

abstract:
  The LDC formalism for DIS can describe HERA structure functions, and also
agrees well with CTEQ and MRST gluon distributions. It is also suitable for
hadronic collisions, and provides a strong connection between ep and pp
reactions. Some preliminary results are presented.


title:
The $\mu\to e\gamma$ and $\tau\to \mu\gamma$ decays in the general two
  Higgs Doublet model with the inclusion of one universal extra dimension

abstract:
  We study the effect of one universal extra dimension on the branching ratios
of the lepton flavor violating processes \mu\to e\gamma and \tau\to \mu\gamma
in the general two Higgs doublet model. We observe that these new effects are
tiny for the small values of the compactification radius R. Furthermore, we see
that these effects are comparable with the branching ratio obtained without
including extra dimension, if the neutral Higgs bosons are nearly degenerate
and the complexity of the Yukawa coupling, inducing the vertex tau-tau-$h^0
(A^0)$, is large.


title: Diffractive Vector Meson Production with a Large Momentum Transfer

abstract:
  We summarise recent progress in the computation of helicity amplitudes for
diffractive vector meson production at large momentum transfer and their
comparison to data collected at the HERA collider.


title: Unintegrated Parton Densities and Applications

abstract:
  Different formalisms for unintegrated parton densities are discussed, and
some results and applications are presented.


title: Higher-Order Results in the Electroweak Theory

abstract:
  The present status of higher-order results in the electroweak theory is
summarised, with particular emphasis on recent two-loop results for the
prediction of the W-boson mass in the Standard Model and leading three-loop
corrections to the rho parameter. The remaining theoretical uncertainties in
the prediction for the W-boson mass and the effective weak mixing angle are
discussed.


title:
Prospects of probing $\theta_{13}$ and neutrino mass hierarchy by
  Supernova Neutrinos in KamLAND

abstract:
  In this paper we study the physics potential of the KamLAND detector in
probing neutrino oscillation parameters through observation of supernova
neutrinos. In particular, we discuss the possibilities of probing the mixing
angle $\theta_{13}$ and determining the sign of $\Delta m^2_{32}$ from the
total charged current(CC) event rates on the proton and $^{12}{C}$ target, as
well as from the CC spectra. We discuss the chances of probing the earth matter
effect induced modulations from the observation of CC spectra in the different
CC reactions in KamLAND and find the volume required to get a statistically
significant signature of the earth matter effect in different energy bins. We
also calculate the event rates expected in the neutral current (NC) reactions
on Carbon and free proton and investigate if the charged current to neutral
current ratios, which are free of the absolute luminosity uncertainty in the
supernova neutrino fluxes, can be useful in probing the oscillation parameters.


title:
$\tau$ Anomalous Couplings and Radiation Zeros in the $e^+e^- \to \tau
  \bar\tau \gamma$ process

abstract:
  The process $e^+e^- \to \tau \bar\tau \gamma$ contains configurations of the
four-momenta for which the scattering amplitude vanishes (Radiation Zeros or
Null Zone). These Radiation Zeros only occur for couplings given by a gauge
theory, in particular the standard model. Therefore they are sensitive to
physics beyond the standard model as the anomalous magnetic and weak moment of
the $\tau$ lepton. In this article we compute the effect of these anomalous
interactions on the Radiation Zeros in the above mentioned process.


title:
Proposal for a New Reconstruction Technique for SUSY Processes at the
  LHC

abstract:
  When several sparticle masses are known, the kinematics of SUSY decay
processes observed at the LHC can be solved if the cascade decays contain
sufficient steps. We demonstrate four examples of this full reconstruction
technique applied to channels involving leptons, namely a) gluino mass
determination, b) sbottom mass determination, c) LSP momentum reconstruction,
and d) heavy higgs mass determination.


title: Measuring the Mass of the Lightest Chargino at the CERN LHC

abstract:
  Results are presented of a feasibility study of techniques for measuring the
mass of the lightest chargino at the CERN LHC. These results suggest that for
one particular mSUGRA model a statistically significant chargino signal can be
identified and the chargino mass reconstructed with a precision of order 11%
for of order 100 fb-1 of data.


title: Predictions for nonleptonic Lambda_b and Theta_b decays

abstract:
  We study nonleptonic Lambda_b -> Lambda_c pi, Sigma_c pi and Sigma_c^* pi
decays in the limit m_b, m_c, E_pi >> Lambda_{QCD} using the soft-collinear
effective theory. Here Sigma_c = Sigma_c(2455) and Sigma_c^* = Sigma_c(2520).
At leading order the Lambda_b -> Sigma_c^{(*)} pi rates vanish, while the
Lambda_b -> Lambda_c pi rate is related to Lambda_b -> Lambda_c\ell\bar\nu, and
is expected to be larger than Gamma(B -> D^{(*)} pi). The dominant
contributions to the Lambda_b -> Sigma_c^{(*)} pi rates are suppressed by
Lambda_{QCD}^2/E_pi^2. We predict Gamma(Lambda_b -> Sigma_c^* pi) /
Gamma(Lambda_b -> Sigma_c pi) = 2 + O[Lambda_{QCD}/m_Q, alpha_s(m_Q)], and the
same ratio for Lambda_b -> Sigma_c^{(*)} rho and for Lambda_b -> Xi_c^{(',*)}K.
``Bow tie'' diagrams are shown to be suppressed. We comment on possible
discovery channels for weakly decaying pentaquarks, Theta_{b,c} and their
nearby heavy quark spin symmetry partners, Theta_{b,c}^*.