title: The Measurement of the Muon's Anomalous Magnetic Moment Isn't

abstract:
  Recent results announced as measurements of the muon's anomalous magnetic
moment are in fact measurements of the muon's anomalous spin precession
frequency. This precession frequency receives contributions from both the
muon's anomalous magnetic and electric dipole moments. We note that all
existing data cannot resolve this ambiguity, and the current deviation from
standard model predictions may equally well be interpreted as evidence for new
physics in the muon's anomalous magnetic moment, new physics in the muon's
electric dipole moment, or both.


title:
A Solution to the Doublet-Triplet Splitting Problem in the Type IIB
  Supergravity

abstract:
  The doublet--triplet mass splitting problem is one of the most serious
problems in supersymmetric grand unified theories (GUTs). A class of models
based on a product gauge group, such as the SU(5)_{GUT} times U(3)_H or the
SU(5)_{GUT} times U(2)_H, realize naturally the desired mass splitting that is
protected by an unbroken R symmetry. It has been pointed out that various
features in the models suggest that these product-group unification models are
embedded in a supersymmetric brane world. We show an explicit construction of
those models in the supersymmetric brane world based on the Type IIB
supergravity in ten dimensions. We consider T^6/(Z_{12} times Z_2) orientifold
for the compactified six extra dimensions. We find that all of the particles
needed for the GUT-symmetry-breaking sector are obtained from the D-brane
fluctuations. The three families of quarks and leptons are introduced at an
orbifold singularity, although their origin remains unexplained. This paper
includes extensive discussion on anomaly cancellation in a given orbifold
geometry. Relation to the Type IIB string theory, realization of R symmetry as
a rotation of extra-dimensional space, and effective superpotential at low
energies are also discussed.


title:
High-p_T Pion Quenching versus anti+Baryon Enhancement in
  Nucleus-Nucleus Collisions

abstract:
  Jet quenching of quarks and gluons in central A+A collisions suppresses the
high-p_T meson production and exposes novel baryon dynamics that we attribute
to (gluonic) baryon junctions. This mechanism predicts baryon enhancement in a
finite moderate-p_T window that decreases with increasing impact parameter. We
also extend recent calculations of the transverse momentum behavior of p/pi^+
and p-bar/pi^- to other baryon species and show that a similar pattern is
expected for the K^-/Lambda and K^+/bar{Lambda} ratios. Within the framework of
the model constant p-bar/p and bar{Lambda}/Lambda ratios are found in central
Au+Au collisions at RHIC energies up to p_T ~= 4 - 5 GeV.


title: Looking Back at the First Decade of 21st-Century High-Energy Physics

abstract:
  On the occasion of the Tenth Conference on String Phenomenology in 2011, I
review the dramatic progress since 2002 in experimental tests of fundamental
theoretical ideas. These include the discovery of (probably fermionic) extra
dimensions at the LHC, the discovery of dark matter particles, observations of
charged-lepton flavour violation, the debut of quantum gravity phenomenology
and the emergence of space-time from the string soup.


title:
Exchange Current Operators and Electromagnetic Dipole Transitions in
  Heavy Quarkonia

abstract:
  The electromagnetic E1 and M1 transitions in heavy quarkonia ($c\bar c$,
$b\bar b$, $c\bar b$) and the magnetic moment of the $B_c^\pm$ are calculated
within the framework of the covariant Blankenbecler-Sugar (BSLT) equation. The
aim of this paper is to study the effects of two-quark exchange current
operators which involve the $Q\bar Q$ interaction, that arise in the BSLT (or
Schr\"odinger) reduction of the Bethe-Salpeter equation. These are found to be
small for E1 dominated decays such as $\psi(nS)\to \chi_{cJ} \gamma$ and
$\Upsilon(nS)\to \chi_{bJ} \gamma$, but significant for the M1 dominated
transitions. It is shown that a satisfactory description of the empirical data
on E1 and M1 transitions in charmonium and bottomonium requires unapproximated
treatment of the Dirac currents of the quarks. Finally, it is demonstrated that
many of the transitions are sensitive to the form of the $Q\bar Q$
wavefunctions, and thus require a realistic treatment of the large hyperfine
splittings in the heavy quarkonium systems.


title:
High-energy neutrino conversion into electron-W pair in magnetic field
  and its contribution to neutrino absorption

abstract:
  We calculate the conversion rate of high-energy neutrinos propagating in
constant magnetic field into an electron-W pair (nu -> W + e) from the
imaginary part of the neutrino self-energy. Using the exact propagators in
constant magnetic field, the neutrino self-energy has been calculated to all
order in the field within the Weinberg-Salam model. We obtain a compact formula
in the limit of B << Bcr = m^2/e. We find that above the process threshold Eth
\~ 2.2 10^16 (Bcr / B) eV this contribution to the absorption of neutrinos
yields an asymptotic absorption length ~ 1.1 (Bcr / B)^2 (10^{16} eV / E)
meters.


title:
SUSY breaking mediation mechanisms and (g-2)_\mu, B -> X_s \gamma, B ->
  X_{s} l^+ l^- and B_s -> \mu^+ \mu^-

abstract:
  We show that there are qualitative differences in correlations among
$(g-2)_{\mu}$, $B\to X_s \gamma$, $B \to X_{s} l^+ l^-$ and $B_s \to \mu^+
\mu^-$ in various SUSY breaking mediation mechanisms: minimal supergravity
(mSUGRA), gauge mediation (GMSB), anomaly mediation (AMSB), gaugino mediation
($\tilde{g}$MSB), weakly and strongly interacting string theories, and $D$
brane models. After imposing the direct search limits on the Higgs boson and
SUSY particle search limits and $B\to X_s \gamma$ branching ratio, we find all
the scenarios can accommodate the $a_\mu \equiv (g-2)_\mu /2 $ in the range of
(a few tens)$\times 10^{-10}$, and predict that the branching ratio for $B\to
X_s l^+ l^-$ can differ from the standard model (SM) prediction by $\pm 20 %$
but no more. On the other hand, the $B_s \to \mu^+ \mu^-$ is sensitive to the
SUSY breaking mediation mechanisms through the pseudoscalar and stop masses
($m_A$ and $m_{\tilde{t}_1}$), and the stop mixing angle. In the GMSB with a
small messenger number, the AMSB, the $\tilde{g}$MSB and the noscale scenarios,
one finds that $B(B_s \to \mu^+ \mu^-) \lesssim 2 \times 10^{-8}$, which is
below the search limit at the Tevatron Run II. Only the mSUGRA or string
inspired models can generate a large branching ratio for this decay.


title:
Complete Two Loop Bosonic Contributions to the Muon Lifetime in the
  Standard Model

abstract:
  The last missing correction to the muon lifetime in the Standard Model at
O(alpha^2) coming from gauge and Higgs boson loops is presented. The associated
contribution to the parameter Delta r in the on-shell scheme ranges from 6
times 10^{-5} to -4 times 10^{-5} for Higgs boson masses from 100 GeV to 1 TeV.
This result translates into a shift of the W boson mass which does not exceed
+/- 1 MeV in the same range and amounts in particular to approximately -0.8 MeV
for a 115 GeV Higgs boson.


title: The Mass of the b Quark

abstract:
  We review the current status of determinations of the b-quark mass, m_b. We
describe the theoretical tools required for determining m_b, with particular
emphasis on effective field theories both in the continuum and on the lattice.
We present several definitions of m_b and highlight their advantages and
disadvantages. Finally, we discuss the determinations of m_b from b-bar b
systems, b-flavored hadrons, and high-energy processes, with careful attention
to the corresponding theoretical uncertainties.


title: Pseudoscalar Higgs boson production at hadron colliders in NNLO QCD

abstract:
  We compute the total cross-section for direct production of the pseudoscalar
Higgs boson in hadron collisions at next-to-next-to-leading order (NNLO) in
perturbative QCD. The O(alpha_s^2) QCD corrections increase the NLO production
cross-section by approximately 20-30 per cent.


title: Development of an X-band Photoinjector at SLAC

abstract:
  As part of a National Cancer Institute contract to develop a compact source
of monoenergetic X-rays via Compton backscattering, we have completed the
design and construction of a 5.5 cell Photoinjector operating at 11.424 GHz.
Successful completion of this project will result in the capability of
generating a monoenergetic X-ray beam, continuously tunable from 20 - 85 KeV.
The immediate goal is the development of a Photoinjector producing 7 MeV, 0.5
nC, sub-picosecond electron bunches with normalized RMS emittances of
approximately 1 pi-mm-mR at repetition rates up to 60 Hz. This beam will then
be further accelerated to 60 MeV using a 1.05 m accelerating structure. This
Photoinjector is somewhat different than the traditional 1.5 cell design both
because of the number of cells and the symmetrically fed input coupler cell.
Its operating frequency is also unique. Since the cathode is non-removable,
cold-test tuning was somewhat more difficult than in other designs. We will
present results of "bead-drop" measurements used in tuning this structure.
Initial beam measurements are currently in progress and results will be
presented as well as results of RF conditioning to high gradients at X-band.
Details of the RF system, emittance-compensating solenoid, and cathode laser
system as well as PARMELA simulations will also be presented.


title:
Phenomenology of lepton flavor violation in 2HDM(III) from (g-2)_mu and
  leptonic decays

abstract:
  We constrain some lepton flavor violating vertices in the context of the two
Higgs doublet model type III, assuming that the lightest scalar Higgs mass $%
m_{h^{0}} $is about $115 $GeV. Specifically, based on the $g-2 $muon factor and
the decay width of$ \mu \to e\gamma $,$ $the following quite general bounds are
obtained:$ 7.62\times 10^{-4}\lesssim \xi_{\mu \tau}^{2}\lesssim 4.44\times
10^{-2}, $ $\xi_{e\tau}^{2}\lesssim 2.77\times 10^{-14}$. Additionally, based
on the processes $\tau \to \mu \gamma $, and $\tau \to \mu \mu \mu $, bounds on
$\xi_{\tau \tau} $and $\xi_{\mu \mu} $are also gotten, such constraints on
these parameters$ $still give enough room for either a strong suppression$ $or
strong enhancement on the coupling of any Higgs boson to a pair of tau leptons
or a pair of muons\textbf{.} Furthermore, upper limits on the decay widths of
the leptonic decays $\tau \to e\gamma, $and $\tau \to eee $are calculated,
finding them to stay far from the reach of near future experiments.


title: Consistently computing the K -> pi long distance weak transition

abstract:
  First we extract the long-distance (LD) weak matrix element from certain data
and give compatible theoretical estimates. We also link this LD scale to the
single-quark-line (SQL) transition scale and then test the latter SQL scale
against the decuplet weak decay amplitude ratio. Finally, we study LD decay.
All of these experimental and theoretical values are in good agreement. We
deduce an average value from eleven experimental determinations compared to the
theoretical SQL values average.


title: Understanding Bottom Production

abstract:
  We describe calculations of b b-bar production to next-to-next-to-leading
order (NNLO) and next-to-next-to-leading logarithm (NNLL) near threshold in pp
interactions. Our calculations are in good agreement with the b b-bar total
cross section measured by HERA-B.


title: Scalar Glueball Decay Into Pions In Effective Theory

abstract:
  We discuss the mixing between the sigma meson sigma and the "pure" glueball
field H and study the decays of the scalar glueball candidates f_0(1370),
f_0(1500) and f_0(1710) (a linear combination of sigma and H) into two pions in
an effective linear sigma model.


title: Phonons and gluons in the crystalline color superconducting phase of QCD

abstract:
  The High Density Effective Theory formalism is used to calculate the low
energy properties of the phonons and gluons in the
Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) phase of two-flavor QCD. The effective
phonon Lagrangian for the cubic crystal structure, which is favored according
to a recent study, depends, at the second order in the derivatives, on three
parameters which we calculate in this paper. We also compute for soft momenta
the effective lagrangian for the gluons of the unbroken SU(2)_c group, both for
a single plane wave structure and for the cube. In both cases the Meissner
gluon mass vanishes as in the case of complete isotropy; on the other hand
there is a partial Debye screening due to the existence of blocking regions on
the Fermi spheres. For the single plane wave structure the gluon dielectric
tensor is non isotropic, while it is isotropic for the cubic crystal, in spite
of the intrinsic anisotropy of the structure.


title:
Phenomenological Relation between Distribution and Fragmentation
  Functions

abstract:
  We study the relation between the quark distribution function q(x) and the
fragmentation function D_q(z) based on a general form D_q(x) =
C(z)z^{alpha}q(z) for valence and sea quarks. By adopting two known
parametrizations of quark distributions for the proton, we find three simple
options for the fragmentation functions that can provide a good description of
the available experimental data on proton production in e^+ e^- inelastic
annihilation. These three options support the revised Gribov-Lipatov relation
D_q(z) = z q(z) at z --> 1, as an approximate relation for the connection
between distribution and fragmentation functions. The three options differ in
the sea contributions and lead to distinct predictions for antiproton
production in the reaction p+p --> p-bar+X, thus they are distinguishable in
future experiments at RHIC-BNL.


title: Systematics of quark-antiquark states and scalar exotic mesons

abstract:
  The analysis of the experimental data of Crystal Barrel Collaboration on the
p anti-p annihilation in flight with the production of mesons in the final
state resulted in a discovery of a large number of mesons over the region
1900-2400 MeV, thus allowing us to systematize quark-antiquark states in the
(n,M^2) and (J,M^2) planes, where n and J are radial quantum number and spin of
the meson with the mass M. The data point to meson trajectories in these planes
being approximately linear, with a universal slope. The sector of scalar mesons
is discussed in more detail, where, on the basis of the recent K-matrix
analysis, the nonet classification of quark-antiquark states was performed: in
the region below 2000 MeV, two scalar nonets are fixed, that is, the basic one
and the nonet of the first radial excitation. In the scalar sector, there are
two states with the isospin I=0, which are extra ones with respect to the
quark--antiquark classification, i.e. exotic states: the broad resonance
f0(1200-1600) and the light sigma-meson. The ratios of coupling constants for
hadronic decays to the states pi pi, K anti-K, eta eta, eta eta' point to the
gluonium nature of the broad state f0(1200-1600).


title:
Azimuthal asymmetries at CLAS: Extraction of e^a(x) and prediction of
  A_{UL}

abstract:
  First information on the chirally odd twist-3 proton distribution function
e(x) is extracted from the azimuthal asymmetry, A_{LU}, in the
electro-production of pions from deeply inelastic scattering of longitudinally
polarized electrons off unpolarized protons, which has been recently measured
by CLAS collaboration. Furthermore parameter-free predictions are made for
azimuthal asymmetries, A_{UL}, from scattering of an unpolarized beam on a
polarized proton target for CLAS kinematics.


title:
NLO corrections to ultra-high energy neutrino-nucleon scattering,
  shadowing and small x

abstract:
  We reconsider the Standard Model interactions of ultra-high energy neutrinos
with matter. The next to leading order QCD corrections are presented for
charged-current and neutral-current processes. Contrary to popular
expectations, these corrections are found to be quite substantial, especially
for very large (anti-) neutrino energies. Hence, they need to be taken into
account in any search for new physics effects in high-energy neutrino
interactions. In our extrapolation of the parton densities to kinematical
regions as yet unexplored directly in terrestrial accelerators, we are guided
by double asymptotic scaling in the large Q^2 and small Bjorken x region and to
models of saturation in the low Q^2 and low x regime. The sizes of the
consequent uncertainties are commented upon. We also briefly discuss some
variables which are insensitive to higher order QCD corrections and are hence
suitable in any search for new physics.


title:
Non-factorized genuine twist 3 in exclusive electro-production of vector
  mesons

abstract:
  We present an analysis of genuine twist-3 quark contributions to the
amplitude of exclusive electro-production of transversely polarized vector
mesons. Using the formalism based on the momentum representation we calculated
all the genuine twist-3 terms of quark contributions to gamma_T^* --> rho_T
amplitude. We found that these terms can not be factorized owing to the
existence of the infrared divergencies in the amplitude of hard sub-processes.


title: Diffractive Physics at HERA

abstract:
  A great interest for diffraction has been generated these last years by the
HERA data. They give us the first opportunity to understand high energy
diffractive physics in terms of a fundamental theory, i.e. QCD. A review of the
main results from H1 and ZEUS in this field is presented and the relation with
the proton structure function at small x-Bjorken values is discussed.


title: T--odd correlations in (B -> K* l^+ l^-) decay beyond standard model

abstract:
  T--odd correlations as physical observables in the $B \rar K^\ast \ell^+
\ell^-$ decay have been studied using the most general form of the effective
Hamiltonian. It is observed that these quantities are very sensitive to the new
physics. We estimate the potential of discovery of these quantities at future
hadron colliders.


title:
Kaluza-Klein decomposition and gauge coupling unification in orbifold
  GUTs

abstract:
  We discuss Kaluza-Klein (KK) decomposition in 5-dimensional (5D) field
theories with orbifold compactification. Kinetic terms localized at orbifold
fixed points, which are inevitably present in any realistic model, modify the
standard KK mass spectrum and interactions of KK modes. This, in turn, can
significantly affect phenomenology of the orbifold models. As an example, we
discuss gauge coupling unification in N=1 supersymmetric 5D orbifold SU(5)
model. We have found that uncertainties in the predictions of the model related
to modification of the KK masses are large and essentially uncontrollable.


title:
NLO Corrections to the Photon Impact Factor: Combining Real and Virtual
  Corrections

abstract:
  In this third part of our calculation of the QCD NLO corrections to the
photon impact factor we combine our previous results for the real corrections
with the singular pieces of the virtual corrections and present finite analytic
expressions for the quark-antiquark-gluon intermediate state inside the photon
impact factor. We begin with a list of the infrared singular pieces of the
virtual correction, obtained in the first step of our program. We then list the
complete results for the real corrections (longitudinal and transverse photon
polarization). In the next step we define, for the real corrections, the
collinear and soft singular regions and calculate their contributions to the
impact factor. We then subtract the contribution due to the central region.
Finally, we combine the real corrections with the singular pieces of the
virtual corrections and obtain our finite results.


title:
Using Entropy to Discriminate Annihilation Channels in Neutralinos
  Making up Galactic Halos

abstract:
  Applying the microcanonical definition of entropy to a weakly interacting and
self--gravitating neutralino gas, we evaluate the change in the local entropy
per particle of this gas between the freeze out era and present day virialized
halo structures. An ``entropy consistency'' criterion emerges by comparing
theoretical and empirical estimates of this entropy. We apply this criterion to
the cases when neutralinos are mostly B-inos and mostly Higgsinos, in
conjunction with the usual ``abundance'' criterion requiring that present
neutralino relic density complies with $0.2<\Omega_{{\tilde\chi^1_0}} < 0.4$
for $h\simeq 0.65$. The joint application of both criteria reveals that a much
better fitting occurs for the B-ino than for the Higgsino channels, so that the
former seems to be a favored channel along the mass range of $155 \hbox{GeV} <
m_{{\tilde\chi^1_0}} < 230 \hbox{GeV}$. These results are consistent with
neutralino annihilation patterns that emerge from recent theoretical analysis
on cosmic ray positron excess data reported by the HEAT collaboration. The
suggested methodology can be applied to test other annihilation channels of the
neutralino, as well as other particle candidates of thermal WIMP gas relics.


title:
Constraining Majorana neutrino electromagnetic properties from the
  LMA-MSW solution of the solar neutrino problem

abstract:
  In this paper we use solar neutrino data to derive stringent bounds on
Majorana neutrino transition moments (TMs). Should such be present, they would
contribute to the neutrino--electron scattering cross section and hence alter
the signal observed in Super-Kamiokande. Motivated by the growing robustness of
the LMA-MSW solution of the solar neutrino problem indicated by recent data,
and also by the prospects of its possible confirmation at KamLAND, we assume
the validity of this solution, and we constrain neutrino TMs by using the
latest global solar neutrino data. We find that all elements of the TM matrix
can be bounded at the same time. Furthermore, we show how reactor data play a
complementary role to the solar neutrino data, and use the combination of both
data sets to improve the current bounds. Performing a simultaneous fit of
LMA-MSW oscillation parameters and TMs we find that 6.3 times 10^{-10} mu_B and
2.0 times 10^{-10} mu_B are the 90% C.L. bounds from solar and combined solar +
reactor data, respectively. Finally, we perform a simulation of the upcoming
Borexino experiment and show that it will improve the bounds from today's data
by roughly one order of magnitude.


title:
Future e^+ e^- Colliders Sensitivity to H b b-bar Coupling and CP
  Violation

abstract:
  We perform a complete simulation of the process e^+ e^- --> b b-bar nu
nu-bar, where nu can be an electron, muon or tau neutrino, in the context of a
general Higgs coupling to b quarks. We parametrize the H b b-bar coupling as
m_b/v (a + i gamma_5 b). Taking into account interference effects between pure
Higgs and Standard Model contributions, we find that sensitivities of the order
of 2% and 20% can be obtained at a future e^+ e^- collider for deviations of
the $a$ and $b$ parameters respectively from their Standard Model values.
Combining our analysis with an independent measurement of Gamma_{H --> b b-bar}
can provide evidence about the CP nature of the Higgs sector.


title:
Octet magnetic moments and the Coleman-Glashow sum rule violation in the
  chiral quark model

abstract:
  Baryon octet magnetic moments when calculated within the chiral quark model,
incorporating the orbital angular momentum as well as the quark sea
contribution through the Cheng-Li mechanism, not only show improvement over the
non relativistic quark model results but also gives a non zero value for the
right hand side of Coleman-Glashow sum rule. When effects due to spin-spin
forces between constituent quarks as well as `mass adjustments' due to
confinement are added, it leads to an excellent fit for the case of p,
\Sigma^+, \Xi^o and violation of Coleman-Glashow sum rule, whereas in almost
all the other cases the results are within 5% of the data.


title:
Preon Trinity - A Schematic Model of Leptons, Quarks and Heavy Vector
  Bosons

abstract:
  Quarks, leptons and heavy vector bosons are suggested to be composed of
stable spin-1/2 preons, existing in three flavours, combined according to
simple rules. Straightforward consequences of an SU(3) preon-flavour symmetry
are the conservation of three lepton numbers, oscillations and decays between
some neutrinos, and the mixing of the d and s quarks, as well as of the vector
fields W^0 and B^0. We find a relation between the Cabibbo and Weinberg mixing
angles, and predict new (heavy) leptons, quarks and vector bosons, some of
which might be observable at the Fermilab Tevatron and the future CERN LHC. A
heavy neutrino might even be visible in existing data from the CERN LEP
facility.


title:
Radiative Generation of the LMA Solution from Small Solar Neutrino
  Mixing at the GUT Scale

abstract:
  We show that in see-saw models with small or even vanishing lepton mixing
angle $\theta_{12}$, maximal $\theta_{23}$, zero $\theta_{13}$ and zero CP
phases at the GUT scale, the currently favored LMA solution of the solar
neutrino problem can be obtained in a rather natural way by Renormalization
Group effects. We find that most of the running takes place in the energy
ranges above and between the see-saw scales, unless the charged lepton Yukawa
couplings are large, which would correspond to a large $\tan \beta$ in the
Minimal Supersymmetric Standard Model (MSSM). The Renormalization Group
evolution of the solar mixing angle $\theta_{12}$ is generically larger than
the evolution of $\theta_{13}$ and $\theta_{23}$. A large enhancement occurs
for an inverted mass hierarchy and for a regular mass hierarchy with $|m_2 -
m_1| \ll |m_2 + m_1|$. We present numerical examples of the evolution of the
lepton mixing angles in the Standard Model and the MSSM, in which the current
best-fit values of the LMA mixing angles are produced with vanishing solar
mixing angle $\theta_{12}$ at the GUT scale.


title: A simple explanation of the non-appearance of physical gluons and quarks

abstract:
  We show that the non-appearance of gluons and quarks as physical particles is
a rigorous and automatic result of the full, i.e. nonperturbative, nonabelian
nature of the color interaction in quantum chromodynamics. This makes it in
general impossible to describe the color field as a collection of elementary
quanta (gluons). Neither can a quark be an elementary quantum of the quark
field, as the color field of which it is the source is itself a source, making
isolated noninteracting quarks, crucial for a physical particle interpretation,
impossible. In geometrical language, the impossibility of quarks and gluons as
physical elementary particles arises due to the fact that the color Yang-Mills
space does not have a constant trivial curvature.
  In QCD, the particles ``gluons'' and ``quarks'' are merely artifacts of an
approximation method (the perturbative expansion) and are simply absent in the
exact theory. This also coincides with the empirical, experimental evidence.


title: Precision predictions for W-pair production at LEP2

abstract:
  Theoretical calculations for the W-pair production process at LEP2 in terms
of Monte Carlo event generators RacoonWW and KorlaW&YFSWW3 are reviewed. The
discussion concentrates on precision predictions for the main LEP2 WW
observables. The theoretical precision of the above programs is estimated to be
~0.5% for the total WW cross section sigma_{WW}, ~5MeV for the W-boson mass
M_W, and ~0.005 for the triple-gauge-boson coupling lambda = lambda_{gamma} =
lambda_Z, which is sufficient for the final LEP2 data analyses.


title: The Hartree ensemble approximation revisited: The "symmetric phase"

abstract:
  The Hartree ensemble approximation is studied in the ``symmetric phase'' of
1+1 dimensional lambda phi^4 theory. In comparison with the ``broken phase''
studied previously, it is shown that the dynamical evolution of observables
such as the particle distribution, energy exchange and auto-correlation
functions, is substantially slower. Approximate thermalization is found only
for relatively large energy densities and couplings.


title: Interpreting data from WIMP direct detection experiments

abstract:
  Weakly Interacting Massive Particle (WIMP) direct detection experiments are
closing in on the region of parameter space where relic neutralinos may
constitute the galactic halo dark matter. We discuss two issues in the
interpretation of data, in particular the calculation of exclusion limits, from
these experiments. Firstly we show that the technique that has been used for
calculating exclusion limits from binned data without background subtraction
produces erroneously tight limits, and discuss alternative methods which avoid
this problem. We then argue that the standard maxwellian halo model is likely
to be a poor approximation to the dark matter distribution and examine how halo
models with triaxiality, velocity anisotropy and small scale clumping affect
exclusion limits.


title: Dilepton production from the Color Glass Condensate

abstract:
  We consider dilepton production in high energy proton-nucleus (and very
forward nucleus-nucleus) collisions. Treating the target nucleus as a Color
Glass Condensate and describing the projectile proton (nucleus) as a collection
of quarks and gluons as in the parton model, we calculate the differential
cross section for dilepton production in quark-nucleus scattering and show that
it is very sensitive to the saturation scale characterizing the target nucleus.


title:
CP Violation Effects on $B^0_{s,d}\to \it l^+\it l^-$ in Supersymmetry
  at Large $\tan\beta$

abstract:
  An analytic analysis of the CP violating effects arising from the soft SUSY
breaking parameters on the decays $B^0_{s,d}\to \it l^+\it l^-$ at large
$\tan\beta$ is given. It is found that the phases have a strong effect on the
branching ratio and in some regions of the parameter space they can lead to a
variation of the branching ratio by as much as 1-2 orders of magnitude. These
results have important implications for the discovery of the $B^0_{s}\to
\mu^+\mu^-$ signal in RUNII of the Tevatron and further on how the parameter
space of SUSY models will be limited once the signal is found.


title: Higgs Boson Production at Hadron Colliders

abstract:
  I report on a calculation of the inclusive Higgs boson production cross
section at hadron colliders at next-to-next-to-leading order in QCD. The result
is computed as an expansion about the threshold region. By continuing the
expansion to very high order, we map the result onto basis functions and obtain
the result in closed analytic form.


title: B_{d,s}^0 --> K^{(*)} K-bar^{(*)}: CP phase alpha and New Physics

abstract:
  The decays B_{d,s}^0 --> K^{(*)} K-bar^{(*)} can be used to measure the angle
alpha of the CKM unitarity triangle. The theoretical error from SU(3) breaking
is expected to be small, so that the determination of alpha is clean. Moreover,
since B_{d,s}^0 --> K^{(*)} K-bar^{(*)} are pure penguin decays, they are
particularly sensitive to the presence of new physics


title: Partonic Energy Loss and the Drell-Yan Process

abstract:
  We examine the current status of the extraction of the rate of partonic
energy loss in nuclei from A dependent data. The advantages and difficulties of
using the Drell-Yan process to measure the energy loss of a parton traversing a
cold nuclear medium are discussed. The prospects of using relatively low energy
proton beams for a definitive measurement of partonic energy loss are
presented.


title:
Field theory of the photon self-energy in a medium with a magnetic field
  and the Faraday effect

abstract:
  A convenient and general decomposition of the photon self-energy in a
magnetized, but otherwise isotropic, medium is given in terms of the minimal
set of tensors consistent with the transversality condition. As we show, the
self-energy in such a medium is completely parametrized in terms of nine
independent form factors, and they reduce to three in the long wavelength
limit. We consider in detail an electron gas with a background magnetic field,
and using finite temperature field theory methods, we obtain the one-loop
formulas for the form factors, which are exact to all orders in the magnetic
field. Explicit results are derived for a variety of physical conditions. In
the appropriate limits, we recover the well-known semi-classical results for
the photon dispersion relations and the Faraday effect. In more general cases,
where the semi-classical treatment or the linear approximation (weak field
limit) are not applicable, our formulas provide a consistent and systematic way
for computing the self-energy form factors and, from them, the photon
dispersion relations.


title: B_{s,d}--> mu^+ mu^- in technicolor model with scalars

abstract:
  Rare decays B_{s,d}-->mu^+ mu^- are evaluated in technicolor model with
scalars. R_b is revisited to constrain the model parameter space. It is found
that restriction on f/f' arising from R_b which was not considered in previous
studies requires f/f' no larger than 1.9 at 95% confidence level, implying no
significantly enhancement for Br(B_{s,d}-->mu^+\mu^-) from neutral scalars in
the model. However, the branching ratio of B_s--> mu^+ mu^- can still be
enhanced by a factor of 5 relative to the standard model prediction. With the
value of f/f' about 1.9, an upgraded Tevatron with an integrated luminosity
20fb^-1 will be sensitive to enhancement of B_s-->mu^+ mu^- in this model
provided that neutral scalar mass m_sigma is below 580 GeV.


title:
CP, T and CPT Violations in the K^0 - bar{K^0} System -- Present Status
  --

abstract:
  Possible violation of CP, T and CPT symmetries in the K^0 - bar{K^0} system
is studied in a way as phenomenological and comprehensive as possible. For this
purpose, we first introduce parameters which represent violation of these
symmetries in mixing parameters and decay amplitudes in a convenient and
well-defined way and, treating these parameters as small, derive formulas which
relate them to the experimentally measured quantities. We then perform
numerical analyses to derive constraints to these symmetry-violating
parameters, with the latest data reported by KTeV Collaboration, NA48
Collaboration and CPLEAR Collaboration, along with those compiled by Particle
Data Group, used as inputs. The result obtained by CPLEAR Collaboration from an
unconstrained fit to a time-dependent leptonic asymmetry, aided by the
Bell-Steinberger relation, enables us to determine or constrain most of the
parameters separately. It is shown among the other things that (1) CP and T
symmetries are violated definitively at least at the level of 10^{-4} in 2 pi
decays, (2) CP and T symmetries are violated at least at the level of 10^{-3}
in the K^0 - bar{K^0} mixing, and (3) CPT symmetry is at present tested to the
level of 10^{-5} at the utmost.


title: Top-Squark Study at a Future e^+e^- Linear Collider

abstract:
  We discuss a potential of studying the production and the decay of the
lightest top squark (t-tilde_1) in the framework of the supersymmetric standard
model at a future e^+e^- collider. In particular, we consider the process
t-tilde_1 -> t chi^0_1 (with chi^0_1 being the lightest neutralino) followed by
t -> bW. It is shown that, by the study of the angular distribution of the
bottom quark (as well as the production cross section of the top squark),
properties of chi_1^0 can be extracted. We also discuss that, if chi^0_1 is
gaugino-like, the neutralino mixing parameters (i.e., the so-called
mu-parameter and tan beta) may be constrained.


title:
Quark-antiquark composite systems: the Bethe-Salpeter equation in the
  spectral-integration technique

abstract:
  The Bethe-Salpeter equations for the light-quark composite systems, q q-bar,
are written in terms of spectral integrals. For the q q-bar -mesons
characterized by the mass M, spin J and radial quantum number n, the equations
are presented for the following (n,M^2)-trajectories: pi_J, eta_J, a_J, f_J,
rho_J, omega_J, h_J and b_J.


title: NLO corrections to the photon impact factor

abstract:
  We review the program of the calculation of next-to-leading order corrections
to the virtual photon impact factor. Following a brief introduction we present
some technical aspects for the various contributions. Recently obtained results
for transversely polarised virtual photons are discussed and an outline of how
infrared divergences are cancelled is given. Implications of the subtraction of
leading energy logarithms are discussed.


title: Primordial magnetic fields

abstract:
  Large scale magnetic fields represent a triple point where cosmology,
high-energy physics and astrophysics meet for different but related purposes.
After reviewing the implications of large scale magnetic fields in these
different areas, the role of primordial magnetic fields is discussed in various
physical processes occurring prior to the decoupling epoch with particular
attention to the big bang nucleosynthesis (BBN) epoch and to the electroweak
(EW) epoch. The generation of matter--antimatter isocurvature fluctuations,
induced by hypermagnetic fields, is analyzed in light of a possible increase of
extra-relativistic species at BBN. It is argued that stochastic GW backgrounds
can be generated by hypermagnetic fields at the LISA frequency. The problem of
the origin of large scale magnetic fields is also scrutinized.


title: Radiative Electroweak Symmetry Breaking from a Quasi-Localized Top Quark

abstract:
  We consider 5D supersymmetric SU(3) x SU(2) x U(1) theories compactified at
the TeV scale on S^1/Z_2 with supersymmetry broken by boundary conditions.
Localizing the top quark at a boundary of a fifth dimension by a bulk mass term
M_t, reduces the strength of radiative electroweak symmetry breaking. For M_t R
approximately 1--2, the natural value for the top and bottom squark masses are
raised to 500--1200 GeV, and all other superpartners may have masses of the
compactification scale, which has a natural range of 1/R ~= 1.5--3.5 TeV. The
superpartner masses depend only on 1/R, and are precisely correlated amongst
themselves and with the mass of the Higgs boson, which is lighter than 130 GeV.


title: Multi-hadron Final States

abstract:
  This summary aims to highlight major results and insights gained from recent
studies of hadronic final states in ep, ppbar, e+e-, as well as relevant
theoretical developments, presented in the Multi-hadron final states parallel
sessions of the DIS2002 workshop held in Krakow, Poland in May 2002.


title: Heavy Quark Photoproduction in k_T Factorization Approach

abstract:
  We investigate the heavy quark photoproduction based on the k_T factorization
approach, focusing on the results from the saturation model. The deviations in
the results using the unintegrated gluon distribution considering the
saturation model and the derivative of the collinear gluon distribution are
analysed. Total cross sections and p_T distributions are analysed in detail,
setting the deviations between the color dipole approximation and the complete
semihard approach.


title: MadEvent: Automatic Event Generation with MadGraph

abstract:
  We present a new multi-channel integration method and its implementation in
the multi-purpose event generator MadEvent, which is based on MadGraph. Given a
process, MadGraph automatically identifies all the relevant subprocesses,
generates both the amplitudes and the mappings needed for an efficient
integration over the phase space, and passes them to MadEvent. As a result, a
process-specific, stand-alone code is produced that allows the user to
calculate cross sections and produce unweighted events in a standard output
format. Several examples are given for processes that are relevant for physics
studies at present and forthcoming colliders.


title: Cosmological Sign of Neutrino CP Violation

abstract:
  It is shown how, in a class of models, the sign of the baryon number of the
universe can be related to CP violation in neutrino oscillation experiments.


title: Perspectives on Exclusive Processes in QCD

abstract:
  Hard hadronic exclusive processes are now at the forefront of QCD studies,
particularly because of their role in the interpretation of exclusive hadronic
B decays. Perturbative QCD and its factorization properties at high momentum
transfer provide an essential guide to the phenomenology of exclusive
amplitudes at large momentum transfer--the leading power fall-off of form
factors and fixed-angle cross sections, the dominant helicity structures, and
their color transparency properties. The hard scattering subprocess amplitude
T_H controlling the leading-twist amplitude is evaluated in the perturbative
domain where the propagator virtualities are above the separation scale. A
critical question is the momentum transfer required such that leading-twist
perturbative QCD contributions dominate. I review some of the contentious
theoretical issues and empirical challenges to Perturbative QCD based analyses,
such as the magnitude of the leading-twist contributions, the role of soft and
higher twist QCD mechanisms, the effects of non-zero orbital angular momentum,
the possibility of single-spin asymmetries in deeply virtual Compton
scattering, the role of hidden color in nuclear wavefunctions, the behavior of
the ratio of Pauli and Dirac nucleon form factors, the apparent breakdown of
color transparency in quasi-elastic proton-proton scattering, and the
measurement of hadron and photon wavefunctions in diffractive dijet production.


title:
B_{s,d} -> l^+ l^- and K_L -> l^+ l^- in SUSY models with non-minimal
  sources of flavour mixing

abstract:
  We present a general analysis of B_{s,d}-> l^+ l^- and K_L -> l^+ l^- decays
in supersymmetric models with non-minimal sources of flavour mixing. In spite
of the existing constraints on off-diagonal squark mass terms, these modes
could still receive sizeable corrections, mainly because of Higgs-mediated
FCNCs arising at large tan(beta). The severe limits on scenarios with large
tan(beta) and non-negligible {tilde d}^i_{R(L)}-{d-tilde}^j_{R(L)} mixing
imposed by the present experimental bounds on these modes and Delta B=2
observables are discussed in detail. In particular, we show that scalar-current
contributions to K_L -> l^+ l^- and B-{bar B} mixing set non-trivial
constraints on the possibility that B_s -> l^+ l^- and B_d -> l^+ l^- receive
large corrections.


title:
Modelling generalized parton distributions to describe deeply virtual
  Compton scattering data

abstract:
  We present a new model for generalized parton distributions (GPDs), based on
the aligned jet model, which successfully describes the deeply virtual Compton
scattering (DVCS) data from H1, ZEUS, HERMES and CLAS. We also present an
easily implementable and flexible algorithm for their construction. This new
model is necessary since the most widely used models for GPDs, which are based
on factorized double distributions, cannot, in their current form, describe the
DVCS data when employed in a full QCD analysis. We demonstrate explicitly the
reason for the shortcoming in the data description. We also highlight several
non-perturbative input parameters which could be used to tune the GPDs, and the
$t$-dependence, to the DVCS data using a fitting procedure.


title: Phi meson production at RHIC

abstract:
  The production of phi mesons in Au+Au collisions at RHIC and their
propagation in a hot and dense nuclear medium is studied within the microscopic
quark-gluon string model. The inverse slope parameter of the transverse mass
distribution agrees well with that extracted from the STAR data, while the
absolute yield of phi is underestimated by a factor 2. It appears that the
fusion of strings alone cannot increase the phi yield either. Less than 30% of
detectable phi's experience elastic scattering, this rate is insufficient for
the full thermalization of phi. The directed flow of phi at |y|<2 demonstrates
strong antiflow behavior, whereas its elliptic flow rises up to about 3.5% in
the same rapidity interval. As a function of transverse momentum it rises
linearly with increasing p_t, in agreement with the STAR data, and saturates at
p_t > 2 GeV/c.


title: Democratic Approach To Atmospheric And Solar Neutrino Oscillations

abstract:
  Working with a ${\cal U}(1)$ flavor symmetry, we show how the hierarchical
structure in the charged fermion sector and a democratic approach for neutrinos
that yields large solar and atmospheric neutrino mixings can be simultaneously
realized in the MSSM framework. However, in SU(5) due to the unified multiplets
we encounter difficulties. Namely, democracy for the neutrinos leads to a wrong
hierarchical pattern for charged fermion masses and mixings. We discuss how
this is overcome in flipped SU(5).


title:
Parameter Degeneracies in Neutrino Oscillation Measurement of Leptonic
  CP and T Violation

abstract:
  The measurement of the mixing angle \theta_{13}, sign of \Delta m^2_{13} and
the CP or T violating phase \delta is fraught with ambiguities in neutrino
oscillation. In this paper we give an analytic treatment of the paramater
degeneracies associated with measuring the \nu_\mu -> \nu_e probability and its
CP and/or T conjugates. For CP violation, we give explicit solutions to allow
us to obtain the regions where there exist two-fold and four-fold degeneracies.
We calculate the fractional differences, \Delta \theta / \bar{\theta}, between
the allowed solutions which may be used to compare with the expected
sensitivities of the experiments. For T violation we show that there is always
a complete degeneracy between solutions with positive and negative \Delta
m^2_{13} which arises due to a symmetry and cannot be removed by observing one
neutrino oscillation probability and its T conjugate. Thus, there is always a
four fold parameter degeneracy apart from exceptional points. Explicit
solutions are also given and the fractional differences are computed. The
bi-probability CP/T trajectory diagrams are extensively used to illuminate the
nature of the degeneracies.


title: Modular symmetry, twisted sectors and flavour

abstract:
  We investigate the implications for fermion mass models in heterotic
orbifolds of the modular symmetry mixing twisted states localized at different
fixed points. We show that, unlike in the case of continuous gauge symmetries,
the mass eigenstates do not mix under the symmetry; thus coupling constants in
the low-energy theory are invariant functions of the moduli.


title: Magnetic moment of the rho-meson in QCD sum rules

abstract:
  The rho-meson magnetic moment is calculated in the framework of QCD sum rules
in external fields. Bare loop calculations (parton model) give 2.0. The
contribution of the operators of dimension 6 reduces this value to 1.5.


title:
A study on quantum decoherence phenomena with three generations of
  neutrinos

abstract:
  Using the open quantum system approach applied to the neutrino system, we
derive three generations neutrino probability formulae considering the
oscillation induced by mass plus quantum decoherence contributions.
  The introduction of these dissipative effects is done through the quantum
dynamical semigroup formalism. In addition to the theoretical interest of the
approach, at least from the completeness point of view, this extension of the
formalism to the three flavors, provide us with a direct application: we can
analyze qualitatively the consistency of the two generation pure decoherence
solution to the atmospheric neutrino problem, accommodated within this enlarged
scheme, with the mean tendencies observed for some of the current neutrino
experimental data. This study was performed based on different choices of the
$3 \times 3$ mixing matrix selected in order to adjust the $P_{\nu_{\mu} \to
\nu_{\mu}}$ to the same form it has for the decoherence solution in two
generations. Our qualitative tests for decoherence with three neutrinos show a
clear incompatibility between neutrino data and the theoretical expectations.


title: Reexamined radiative Decay $ B_{q}^*\to B_{q}\gamma $ in Light Cone QCD

abstract:
  The radiative decay $ B_{q}^*\to B_{q}\gamma(q=u,d, or s) $ is reexamined
with a modified light-cone QCD sum rule method, in which adequate chiral
operators are chosen as the interpolating fields in the correlators used for a
sum rule estimate of the relevant coupling $ g_{B_{q}^*B_{q}\gamma} $. The
resulting sum rules not only show the physical picture consistent with the
underlying physics in $ B_{q}^*\to B_{q}\gamma $ but also avoid the pollution
by the nonlocal matrix element $< \gamma(q) | \bar{q}(x)
\gamma_{\mu}\gamma_{5}q(0) | 0>$, which starts with twist-3 and thus may bring
a large uncertainty to the sum rule predictions. Also, a comparison is made
with the previous results from light-cone QCD sum rules and chiral perturbation
theory.


title: Strong Couplings of Heavy Mesons to A Light Vector Meson in QCD

abstract:
  We make a detailed analysis of the $BB\rho(DD\rho)$ and
$B^*B\rho(D^{*}D\rho)$ strong couplings $g_{BB\rho}(g_{DD\rho})$ and
$g_{B^*B\rho}(g_{D^{*}D\rho})$ using QCD light cone sum rules(LCSR). The
existing some negligence is pointed out in the previous LCSR calculation on
$g_{B^*B\rho} (g_{D^{\ast}D\rho}$) and an updated estimate is presented. Our
findings can be used to understand the behavior of the $B,D \to \rho$
semileptonic form factors at large momentum transitions.


title:
Fourth Generation Pseudoscalar Quarkonium Production and Observability
  at Hadron Colliders

abstract:
  The pseudoscalar quarkonium state, eta_4 1^S_0, formed by the Standard Model
(SM) fourth generation quarks, is the best candidate among the fourth
generation quarkonia to be produced at the LHC and VLHC. The production of this
J^{PC} = 0^{-+} resonance is discussed and the background processes are studied
to obtain the integrated luminosity limits for the discovery, depending on its
mass.


title:
Top-charm associated production at hadron colliders in the standard
  model with large extra dimensions

abstract:
  The precise calculations are carried out on the flavor changing neutral
current couplings in the process $pp \to gg \to t\bar{c}(\bar{t}c)$ at the
large hadron collider(LHC) and very large hadron collider(VLHC) in both
frameworks of the minimal standard model(MSM) and its extension with extra
dimensions. We find that the effects from the large extra dimensions can
enhance the total cross section up to about several hundred times as that in
the MSM, quantitatively.


title: Precise determination of the Wtb couplings at LHC

abstract:
  Top pair production at LHC is the ideal place to search for nonstandard Wtb
couplings in t -> W b -> l nu b decays. The lb forward-backward asymmetry in
the W rest frame is very sensitive to sigma_{mu nu} couplings, and can spot
one-loop QCD corrections to the decay vertex with more than 5 sigma statistical
significance. We discuss the potential of this asymmetry to signal nonstandard
gamma_mu and sigma_{mu nu} couplings and compare with top-antitop spin
correlation asymmetries, which have a lower sensitivity. We also briefly
summarise the results for Tevatron.


title: Comparison of coannihilation effects in low-energy MSSM

abstract:
  The neutralino relic density is calculated in the low-energy effective
Minimal Supersymmetric extension of Standard Model (effMSSM). The
slepton-neutralino, squark-neutralino and neutralino/chargino-neutralino
coannihilation channels are taking into account. The comparative study of these
coannihilations is performed and demonstrated that all of them give the sizable
contributions to the reduction of the neutralino relic density. It is shown
that the predictions for direct dark matter detection rates are not strongly
affected by these coannihilation channels in the effMSSM.


title: The Valence Quark Distribution of the Pion

abstract:
  The pion structure function is investigated in a simple model, where the pion
and its constituent quark fields are coupled through the simplest pseudoscalar
coupling. The imaginary part of the forward gamma* pi -> gamma* pi scattering
amplitude is evaluated and related to the structure functions. It is shown that
the introduction of non-perturbative effects, linked to the size of the pion,
allows a connection with the quark distribution. It is predicted that
higher-twist terms become negligible for Q^2 larger than ~2 GeV^2, that quarks
in the pion have a momentum fraction smaller than in the proton case, and that
the momentum sum rule is violated for the pion.


title:
Determination of the $g_{\rho\sigma\gamma}$ coupling constant through
  the process $\gamma+N\to N+V$ with circularly polarized photons

abstract:
  We suggest a method to determine the product of the coupling constants
$g_{\rho\sigma\gamma}g_ {\sigma NN}$, in absolute value and relative sign,
through the $t$-dependence of the two possible T-even asymmetries for the
photoproduction of vector mesons, $\gamma+p\to p+V^0$, $V^0=\rho$ or $\omega$,
in the collision of circularly polarized photons with a polarized proton
target. In the framework of a $\pi+\sigma$-model, these asymmetries are very
sensitive to the relative role of $\pi$- and $\sigma$-exchanges, in the near
threshold region.


title: The perturbative odderon in elastic p p and p pbar scattering

abstract:
  Different models for the odderon-proton coupling are considered and their
effects on the differential cross section in the dip region in elastic p p and
p pbar scattering are investigated. An allowed range for the size of a possible
diquark cluster in the proton can be obtained from a geometrical model.


title: A new Supersymmetric SU(3)_L otimes U(1)_X gauge model

abstract:
  We present a new supersymmetric version of the SU(3) otimes U(1) gauge model
using a more economic content of particles. The model has a smaller set of free
parameters than other possibilities considered before. The MSSM can be seen as
an effective theory of this larger symmetry. We find that the upper bound of
the ligthest CP-even Higgs boson can be moved up to 140 GeV.


title:
Confronting Spectral Functions from e+e- Annihilation and tau Decays:
  Consequences for the Muon Magnetic Moment

abstract:
  Vacuum polarization integrals involve the vector spectral functions which can
be experimentally determined from two sources: (i) e+e- annihilation cross
sections and (ii) hadronic tau decays. Recently results with comparable
precision have become available from CMD-2 on one side, and ALEPH, CLEO and
OPAL on the other. The comparison of the respective spectral functions involves
a correction from isospin-breaking effects which is evaluated. After correction
it is found that the dominant 2pi spectral functions do not agree within
experimental and theoretical uncertainties. Some problems are also found for
the 4pi spectral functions where different experiments do not agree well with
each other. The consequences of these discrepancies for vacuum polarization
calculations are presented, with emphasis on the muon anomalous magnetic
moment. The work includes a complete reevaluation of all exclusive cross
sections, taking into account the most recent data that became available in
particular from the Novosibirsk experiments and applying corrections for the
missing radiative corrections. The values found for the lowest-order hadronic
vacuum polarization contributions are a_mu[had,LO] = (684.7 +- 6.0[exp] +-
3.6[rad])x10^(-10) [e^+e^- -based], and a_mu[had,LO] = (709.0 +- 5.1[exp] +-
1.2[rad] +- 2.8[SU(2)])x10^(-10) [tau-based]. The errors have been separated
according to their sources: experimental, radiative corrections in e+e- data,
and isospin-breaking. We observe deviations of the full SM prediction with the
recent BNL measurement at the 3.0 (e+e-) and 0.9 (tau) sigma level, when adding
experimental and theoretical errors in quadrature.


title:
Squark-, Slepton- and Neutralino-Chargino coannihilation effects in the
  low-energy effective MSSM

abstract:
  Within the low-energy effective Minimal Supersymmetric extension of the
Standard Model (effMSSM) we calculate the neutralino relic density taking into
account slepton-neutralino, squark-neutralino and neutralino/chargino-
neutralino coannihilation channels. By including squark (stop and sbottom)
coannihilation channels we extend our comparative study to all allowed
coannihilations and obtain the general result that all of them give sizable
contributions to the reduction of the neutralino relic density. Due to these
coannihilation processes some models (mostly with large neutralino masses)
enter into the cosmologically interesting region for relic density, but other
models leave this region. Nevertheless, in general, the predictions for direct
and indirect dark matter detection rates are not strongly affected by these
coannihilation channels in the effMSSM.


title: Renormalization Group Analysis of Neutrino Mass Parameters

abstract:
  Tools for calculating the Renormalization Group Equations for renormalizable
and non-renormalizable operators in various theories are reviewed, which are
essential for comparing experimental results with predictions from models
beyond the Standard Model. Numerical examples for the running of the lepton
mixing angles in models with non-degenerate see-saw scales are shown, in which
the best-fit values of the experimentally favored LMA solution are produced
from maximal or from vanishing solar neutrino mixing at the GUT scale.


title: Dynamics of QCD in a Strong Magnetic Field

abstract:
  QCD in a strong magnetic field yields an example of a rich, sophisticated and
controllable dynamics.


title: Probing QCD at Medium Q^2

abstract:
  Quantum Chromodynamics (QCD) is a firmly established part of the Standard
Model, yet its long distance properties remain challenging at a conceptual
level. In recent years significant experimental and theoretical progress has
been made towards a field theoretic understanding of hadrons as QCD bound
states, addressing the complex properties of relativistic bound states in a
gluon condensate with spontaneously broken chiral symmetry. In this
introductory talk I give a personal view of some of the issues involved:
Measuring hadron matrix elements, understanding their QCD dynamics and
explaining the apparently close relationship between hard and soft processes.


title:
Centrality dependence of the multiplicity and transverse momentum
  distributions at RHIC and LHC and the percolation of strings

abstract:
  The dependence of the multiplicity and the transverse momentum distribution
on the number of collisions are studied for central and peripheral Au-Au
collisions at SPS, RHIC and LHC energies in the framework of percolation of
strings. A scaling law relating the multiplicity to the mean transverse
momentum is obtained. Our results are in overall agreement with the SPS and
RHIC data, obtaining a suppression on $p_T$ distribution even for $p_T$ larger
than 1 GeV/c.


title:
QED Radiative Corrections in Processes of Exclusive Pion
  Electroproduction

abstract:
  Formalism for radiative correction (RC) calculation in exclusive pion
electroproduction on the proton is presented. A FORTRAN code EXCLURAD is
developed for the RC procedure. The numerical analysis is done in the
kinematics of current Jefferson Lab experiments.


title: On the stability of the anomaly-induced inflation

abstract:
  We analyze various phases of inflation based on the anomaly-induced effective
action of gravity (modified Starobinsky model), taking the cosmological
constant Lambda and k=0, +/- 1 topologies into account. The total number of the
inflationary e-folds may be enormous, but at the last 65 of them the inflation
greatly slows down due to the contributions of the massive particles. For the
supersymmetric particle content, the stability of inflation holds from the
initial point at the sub-Planck scale until the supersymmetry breaks down.
After that the universe enters into the unstable regime with the eventual
transition into the stable FRW-like evolution with small positive cosmological
constant. It is remarkable, that all this follows automatically, without
fine-tuning of any sort, independent on the values of Lambda and k. Finally, we
consider the stability under the metric perturbations during the last 65
e-folds of inflation and find that the amplitude of the ones with the
wavenumber below a certain cutoff has an acceptable range.


title: Three-Body Charmful Baryonic B Decays $\bar B\to D(D^*)N\bar N$

abstract:
  We study the charmful three-body baryonic B decays $\bar B\to D^{(*)}N\bar
N$: the color-allowed modes $\bar B^0\to D^{(*)+}n\bar p$ and the
color-suppressed ones $\bar B^0\to D^{(*)0}p\bar p$. While the $D^{*+}/D^+$
production ratio is predicted to be of order 3, it is found that $D^0p\bar p$
has a similar rate as $D^{*0}p\bar p$. It is pointed out that $\bar B^0\to
D(D^*)N\bar N$ are dominated by the nucleon vector current or by vector meson
intermediate states, whereas $\bar B^0\to D^0p\bar p$ proceeds mainly via the
exchange of the axial-vector intermediate state $a_1(1260)$. The study of the
$N\bar N$ invariant mass distribution in general indicates a threshold baryon
pair production; that is, a recoil charmed meson accompanied by a low mass
baryon pair except that the spectrum of $D^0p\bar p$ has a hump at large $p\bar
p$ invariant mass $m_{p\bar p}\sim 3.0$ GeV.


title:
Relativistic Calculation of the Meson Spectrum: a Fully Covariant
  Treatment Versus Standard Treatments

abstract:
  A large number of treatments of the meson spectrum have been tried that
consider mesons as quark - anti quark bound states. Recently, we used
relativistic quantum "constraint" mechanics to introduce a fully covariant
treatment defined by two coupled Dirac equations. For field-theoretic
interactions, this procedure functions as a "quantum mechanical transform of
Bethe-Salpeter equation". Here, we test its spectral fits against those
provided by an assortment of models: Wisconsin model, Iowa State model,
Brayshaw model, and the popular semi-relativistic treatment of Godfrey and
Isgur. We find that the fit provided by the two-body Dirac model for the entire
meson spectrum competes with the best fits to partial spectra provided by the
others and does so with the smallest number of interaction functions without
additional cutoff parameters necessary to make other approaches numerically
tractable. We discuss the distinguishing features of our model that may account
for the relative overall success of its fits. Note especially that in our
approach for QCD, the resulting pion mass and associated Goldstone behavior
depend sensitively on the preservation of relativistic couplings that are
crucial for its success when solved nonperturbatively for the analogous
two-body bound-states of QED.


title: Tau neutrino deep inelastic charged current interactions

abstract:
  The nu_mu -> nu_tau oscillation hypothesis will be tested through nu_tau
production of tau in underground neutrino telescopes as well as long-baseline
experiments. We provide the full QCD framework for the evaluation of tau
neutrino deep inelastic charged current (CC) cross sections, including
next-leading-order (NLO) corrections, charm production, tau threshold, and
target mass effects in the collinear approximation. We investigate the
violation of the Albright-Jarlskog relations for the structure functions F_4,5
which occur only in heavy lepton (tau) scattering. Integrated CC cross sections
are evaluated naively over the full phase space and with the inclusion of DIS
kinematic cuts. Uncertainties in our evaluation based on scale dependence, PDF
errors and the interplay between kinematic and dynamical power corrections are
discussed and/or quantified.


title:
A study of QCD coupling constant and power corrections in the fixed
  target deep inelastic measurements

abstract:
  We reanalyze deep inelastic scattering data of BCDMS Collaboration by
including proper cuts of ranges with large systematic errors. We perform also
the fits of high statistic deep inelastic scattering data of BCDMS, SLAC, NM
and BFP Collaborations taking the data separately and in combined way and find
good agreement between these analyses. We extract the values of both the QCD
coupling constant \alpha_s(M^2_Z) up to NLO level and of the power corrections
to the structure function F_2.


title: The Pinch Technique to All Orders

abstract:
  The generalization of the pinch technique to all orders in perturbation
theory is presented. The effective Green's functions constructed with this
procedure are singled out in a unique way through the full exploitation of the
underlying Becchi-Rouet-Stora-Tyutin symmetry. A simple all-order
correspondence between the pinch technique and the background field method in
the Feynman gauge is established.


title: Duality in Semi-Exclusive Processes

abstract:
  Bloom-Gilman duality relates parton distributions to nucleon form factors and
thus constrains the dynamics of exclusive processes. The quark electric charge
dependence implies that exclusive scattering is incoherent on the quarks even
at high momentum transfers. Data on semi-exclusive meson production exceeds the
duality prediction by more than an order of magnitude and violates quark
helicity conservation. This suggests that the subprocess is dominated by soft
`endpoint' contributions which obey dimensional scaling. The large transverse
size of the subprocess may explain the absence of color transparency in fixed
angle processes.


title:
Natural Gravitino Dark Matter and Thermal Leptogenesis in Gauge-Mediated
  Supersymmetry Breaking Models

abstract:
  We point out that there is no cosmological gravitino problem in a certain
class of gauge-mediated supersymmetry-breaking (GMSB) models. The constant term
in the superpotential naturally causes small mixings between the standard-model
and messenger fields, which give rise to late-time decays of the lightest
messenger fields. This decay provides an exquisite amount of entropy, which
dilutes the thermal relics of the gravitinos down to just the observed mass
density of the dark matter. This remarkable phenomenon takes place naturally,
irrespective of the gravitino mass and the reheating temperature of inflation,
once the gravitinos and messenger fields are thermalized in the early Universe.
In this class of GMSB models, there is no strict upper bound on the reheating
temperature of inflation, which makes the standard thermal leptogenesis the
most attractive candidate for the origin of the observed baryon asymmetry in
the present Universe.


title: Valence quark distributions in nucleon at low $Q^2$ in QCD

abstract:
  Valence u- and d-quarks distributions in proton are calculated in QCD at low
$Q^2$ and intermediate x, basing on the operator product expansion (OPE). The
imaginary part of the virtual photon scattering amplitude on quark current with
proton quantum numbers is considered. The initial and final virtualities
$p^2_1$ and $p^2_2$ of the currents are assumed to be large, negative and
different, $p^2_1 \not= p^2_2$. The OPE in $p^2_1$, $p^2_2$ up to dimension 6
operators was performed. Double dispersion representations in $p^2_1, p^2_2$ of
the amplitudes in terms of physical states contributions are used. Putting them
to be equal to those calculated in QCD, the sum rules for quark distributions
are found. The double Borel transformations are applied to the sum rules.
Leading order perturbative corrections are accounted. Valence quark
distributions are found: $u(x)_v$ at $0.15<x<65$,~ $d(x)_v$ at $0.25<x<0.55$
with an accuracy $\sim 30%$ in the middles and $\sim 50%$ at the ends of these
intervals. The quark distributions obtained are in agreement with those found
from the analysis of hard processes data.


title:
Measuring CP violation and mass ordering in joint long baseline
  experiments with superbeams

abstract:
  We propose to measure the CP phase $\delta_{\rm CP}$, the magnitude of the
neutrino mixing matrix element $|U_{e3}|$ and the sign of the atmopheric scale
mass--squared difference $\Delta{\rm m}^2_{31}$ with a superbeam by the joint
analysis of two different long baseline neutrino oscillation experiments. One
is a long baseline experiment (LBL) at 300 km and the other is a very long
baseline (VLBL) experiment at 2100 km. We take the neutrino source to be the
approved high intensity proton synchrotron, HIPA. The neutrino beam for the LBL
is the 2-degree off-axis superbeam and for the VLBL, a narrow band superbeam.
Taking into account all possible errors, we evaluate the event rates required
and the sensitivities that can be attained for the determination of
$\delta_{\rm CP}$ and the sign of $\Delta m^2_{31}$. We arrive at a
representative scenario for a reasonably precise probe of this part of the
neutrino physics.


title: Isospin violation in e+ e- --> B Bbar

abstract:
  The ratio of the B+ B- and B0 B0bar production rates in e+ e- annihilation is
computed as a function of the B meson velocity and BB* pi coupling constant,
using a non-relativistic effective field theory.


title:
The structure functions F_2^c and F_L^c in the framework of the k_T
  factorization

abstract:
  We present the perturbative parts of the structure functions F_2^c and F_L^c
for a gluon target having nonzero transverse momentum squared at order \alpha
_s. The results of the double convolution (with respect to the Bjorken variable
x and the transverse momentum) of the perturbative part and the unintegrated
gluon densities are compared with HERA experimental data for F_2^c. The
contribution from F_L^c structure function ranges 10\div30% of that of F_2^c at
the HERA kinematical range.


title:
Z alpha expansion for self-energy radiative corrections to parity
  nonconservation in atoms

abstract:
  The self-energy and vertex QED radiative corrections to the parity
nonconservation (PNC) amplitude in atoms are obtained using the perturbation
theory in powers of (alpha Z). The calculated linear in (alpha Z) term gives
-0.6 % for the PNC amplitude in Cs. The estimated nonlinear terms make
corrections larger -0.9(2) %. This result brings the experimental data for the
6s-7s transition in 133 Cs in agreement with the standard model.


title: Time Delay Plots of Unflavoured Baryons

abstract:
  We explore the usefulness of the existing relations between the $S$-matrix
and time delay in characterizing baryon resonances in pion-nucleon scattering.
We draw attention to the fact that the existence of a positive maximum in time
delay is a necessary criterion for the existence of a resonance and should be
used as a constraint in conventional analyses which locate resonances from
poles of the $S$-matrix and Argand diagrams. The usefulness of the time delay
plots of resonances is demonstrated through a detailed analysis of the time
delay in several partial waves of $\pi N$ elastic scattering.


title:
Enhanced direct CP violation in $B^{\pm,0} \to \pi^{+} \pi^{-}
  K^{\pm,0}$

abstract:
  We investigate in a phenomenological way, direct CP violation in the hadronic
decays $B^{\pm,0} \to \pi^{+} \pi^{-} K^{\pm,0}$ where the effect of $\rho -
\omega$ mixing is included. If $N_{c}^{eff}$ (the effective parameter
associated with factorization) is constrained using the most recent
experimental branching ratios (to $\rho^{0}K^{0}, \rho^{\pm}K^{\mp},
\rho^{\pm}K^{0}, \rho^{0} K^{\pm}$ and $\omega K^{\pm}$) from the BABAR, BELLE
and CLEO Collaborations, we get a maximum CP violating asymmetry, $a_{max}$, in
the range -25% to $+49%$ for $B^{-} \to \pi^{+}\pi^{-} K^{-}$ and -24% to
$+55%$ for ${\Bar B}^{0} \to \pi^{+}\pi^{-} {\Bar K}^{0}$. We also find that CP
violation is strongly dependent on the Cabibbo-Kobayashi-Maskawa matrix
elements. Finally, we show that the sign of $\sin \delta$ is always positive in
the allowed range of $N_{c}^{eff}$ and hence, a measurement of direct $CP$
violation in $B^{\pm,0} \to \pi^{+} \pi^{-} K^{\pm,0}$ would remove the
mod$(\pi)$ ambiguity in ${\rm arg}[ -
\frac{V_{ts}V_{tb}^{\star}}{V_{us}V_{ub}^{\star}}]$.


title: Rho Meson Properties in the Chiral Theory Framework

abstract:
  We study the mass, width and couplings of the lightest resonance multiplet
with I(J^{PC})=1(1^{--}) quantum numbers. Effective field theories based on
chiral symmetry are employed in order to describe the form factor associated
with the two-pseudoscalar matrix element of the QCD vector current. The bare
poles of the intermediate resonances are regularized through a
Dyson-Schwinger-like summation. We explore the role of the resonance width in
physical observables and make a coupled-channel analysis of final-state
interactions. This provides many interesting properties, as the pole mass
M_rho{pole}= 764.1 +- 2.7 +4.0-2.5 MeV. At energies E~1 GeV, a second 1(1^{--})
resonance multiplet is considered in order to describe the data in a more
consistent way. From the phenomenologically extracted resonance couplings, we
obtain the chiral coupling L_9^r(mu0)= (7.04 +- 0.05 +0.19-0.27)* 10^{-3}, at
mu0=770$ MeV, and show how the running with the scale mu affects the resonance
parameters. A 1/N_C counting is adopted in this work and the consistency of the
large--N_C expansion is tested. Finally, we make an estimation of the
contribution from diagrams with resonances in crossed channels.


title: Renormalization Properties of Softly Broken SUSY Gauge Theories

abstract:
  In the present review we show that renormalizations in a softly broken SUSY
gauge theory are not independent but directly follow from those of an unbroken
or rigid theory. This is a consequence of a treatment of a softly broken theory
as a rigid one in external spurion superfield. This enables one to get the
singular part of effective action in a broken theory from a rigid one by a
simple modification of the couplings. Substituting the modified couplings into
renormalization constants, RG equations, solutions to these equations,
approximate solutions, fixed points, etc., one can get corresponding relations
for the soft terms by a simple Taylor expansion over the Grassmannian
variables. Some examples including the MSSM in low and high $\tan\beta$ regime,
SUSY GUTs and the N=2 Seiberg-Witten model are considered.


title: The rare decays of D mesons

abstract:
  The flavor changing transitions in the c->u gamma, c->u gamma gamma and c->u
l+ l- offer the possibility to search for new physics in the charm sector. We
investigate dominant decay mechanisms in the radiative decays D->V gamma,
D->P(V) l+ l-, D->gamma gamma and we discuss chances to see physics beyond the
standard model in these decays. In addition, we analyze Cabibbo allowed D->K pi
gamma decays with nonresonant K pi, and we probe the role of light vector
mesons in these decays.


title: The Double Radiative Decays $B\to\gamma\gamma$ in the Heavy Quark Limit

abstract:
  We analyze the double radiative B-meson decays B_s -> gamma gamma and B_d ->
gamma gamma in QCD factorization based on the heavy-quark limit m_b >>
Lambda_QCD. We systematically discuss the various contributions to these
exclusive processes. The dominant effect arises from the magnetic-moment type
transition b -> s(d) gamma where an additional photon is emitted from the light
quark (one-particle reducible diagram). The contributions from one-particle
irreducible diagrams are power suppressed. We argue that they are still
calculable within QCD factorization. They are used to compute the
CP-asymmetries in B -> gamma gamma and to estimate so-called long-distance
contributions in B and D -> gamma gamma. Numerical results are presented for
branching ratios and CP asymmetries.


title: Exclusive Radiative Decays of B Mesons in QCD Factorization

abstract:
  We discuss exclusive radiative decays in QCD factorization within the
Standard Model. In particular, we consider the decays B -> V gamma, with a
vector meson K* or rho in the final state, and the double radiative modes B_s
-> gamma gamma and B_d -> gamma gamma. At quark level, all these decays are
governed by the flavour-changing neutral-current b -> s gamma or b -> d gamma
transitions, which appear at the one-loop level in the Standard Model. Such
processes allow us to study CP violation and the interplay of strong and
electroweak interactions, to determine parameters of the CKM matrix, and to
search for New Physics. The exclusive decays are experimentally better
accessible, but pose more problems for the theoretical analysis. The
heavy-quark limit m_b >> Lambda_QCD, however, allows to systematically separate
perturbatively calculable hard scattering kernels from nonperturbative form
factors and universal light-cone distribution amplitudes. For the B -> V gamma
decays we evaluate the leading Lambda_QCD/m_b contributions complete to
next-to-leading order in QCD, including also QCD penguin operators. The double
radiative B -> gamma gamma decays are analyzed with leading-logarithmic
accuracy. We predict branching ratios, CP and isospin asymmetries, and estimate
U-spin breaking effects for B -> K* gamma and B -> rho gamma. For the B ->
gamma gamma decays we give numerical results for branching ratios and CP
asymmetries.


title: Exclusive Radiative Decays of B Mesons

abstract:
  We present within the Standard Model the exclusive radiative decays B ->
K*/rho gamma and B_(s/d) -> gamma gamma in QCD factorization based on the
heavy-quark limit m_b >> Lambda_QCD. For the decays with a vector meson in the
final state we give results complete to next-to-leading order in QCD.


title: U(1) masses in intersecting D-brane SM-like models

abstract:
  For recently constructed classes of D6-brane models, yielding the Standard
Model fermion spectrum and gauge symmetry, we compute lower bounds on the
masses of new U(1) fields that such models predict in addition to the
hypercharge $U(1)_Y$. In models with extra dimensions, generic uncertainties
due to unknown values of the compactification radii of the extra dimensions
affect the value of the string scale and thus the predictive power of such
models. Using $\rho$ parameter and Z-U(1) mixing-angle constraints we show how
to avoid such uncertainties, to provide lower mass bounds for the additional
U(1) fields. These are in the region above 750 GeV for mixing angles less than
$1.5 \times 10^{-3}$ (and as low as 550 GeV for mixing angles of $3\times
10^{-3}$).


title:
Search for new physics effects in Bhabha scattering at e+e- linear
  colliders

abstract:
  We study electron-electron contact-interaction searches in the process e+ +
e- --> e+ + e- at a future linear collider with longitudinally polarized beams,
and evaluate the model-independent constraints on the contact interaction
parameters, emphasizing the role of beam polarization.


title:
Kinematical contributions to the transverse asymmetry in semi-inclusive
  DIS

abstract:
  We discuss the contributions of the transverse spin component of the target
to the double-spin asymmetries in semi-inclusive deep inelastic scattering of
longitudinally polarized electrons off longitudinally polarized protons.


title:
Spin-independent and double-spin cos(phi) asymmetries in semi-inclusive
  pion electroproduction

abstract:
  We consider the cos(phi) dependence of the longitudinal double-spin asymmetry
for charged pion electroproduction in semi-inclusive deep inelastic scattering,
emphasizing intrinsic transverse momentum effects. This azimuthal asymmetry
allows to measure the cos(phi) moments of the unpolarized and double-spin
cross-section, simultaneously. The size of the asymmetry, in the approximation
where all twist-3 interaction-dependent distribution and fragmentation
functions are set to zero, is estimated for HERMES kinematics; both the
spin-independent and the double-spin cos(phi) moments are predicted to be
sizeable and negative.


title: Higgs Boson Theory and Phenomenology

abstract:
  Precision electroweak data presently favors a weakly-coupled Higgs sector as
the mechanism responsible for electroweak symmetry breaking. Low-energy
supersymmetry provides a natural framework for weakly-coupled elementary
scalars. In this review, we summarize the theoretical properties of the
Standard Model (SM) Higgs boson and the Higgs sector of the minimal
supersymmetric extension of the Standard Model (MSSM). We then survey the
phenomenology of the SM and MSSM Higgs bosons at the Tevatron, LHC and a future
e+e- linear collider. We focus on the Higgs discovery potential of present and
future colliders and stress the importance of precision measurements of Higgs
boson properties.


title: Explicit seesaw model and deformed fermion universality

abstract:
  In the simple model of neutrino texture presented in this paper, the Majorana
left-handed mass matrix is zero, the Majorana righthanded mass matrix -
diagonal and degenerate, and the Dirac mass matrix has a hierarchical
structure, deformed unitarily by nearly bimaximal mixing. In the case, when the
Majorana righthanded term dominates over the Dirac term, the familiar seesaw
mechanism leads effectively to the nearly bimaximal oscillations of active
neutrinos, consistent with solar and atmospheric neutrino experiments. If the
Dirac term, before its unitary deformation, is similar in shape to the known
charged-lepton mass matrix, then parameters for solar $\nu_e$'s and atmospheric
$\nu_\mu$'s become related to each other, predicting from the SuperKamiokande
value of $\Delta m_{32}^2$ a tiny $\Delta m_{21}^2$ typical for MSW LOW solar
solution rather than for MSW Large Mixing Angle solution. The predicted mass
spectrum is then hierarchical. In Appendix a suggestive form of nearly
bimaximal effective mass matrix is derived.


title:
A scheme with two large extra dimensions confronted with neutrino
  physics

abstract:
  We investigate a particle physics model in a six-dimensional spacetime, where
two extra dimensions form a torus. Particles with Standard Model charges are
confined by interactions with a scalar field to four four-dimensional branes,
two vortices accommodating ordinary type fermions and two antivortices
accommodating mirror fermions. We investigate the phenomenological implications
of this multibrane structure by confronting the model with neutrino physics
data.


title: Gluino Pair Production at Linear e^+e^- Colliders

abstract:
  We study the potential of high-energy linear $e^+e^-$ colliders for the
production of gluino pairs within the Minimal Supersymmetric Standard Model
(MSSM). In this model, the process $e^+e^-\to\tilde{g}\tilde{g}$ is mediated by
quark/squark loops, dominantly of the third generation, where the mixing of
left- and right-handed states can become large. Taking into account realistic
beam polarization effects, photon and $Z^0$-boson exchange, and current mass
exclusion limits, we scan the MSSM parameter space for various $e^+e^-$
center-of-mass energies to determine the regions, where gluino production
should be visible.


title:
High-t Meson Photo- and Electroproduction: a Window on the Partonic
  Structure of Hadrons

abstract:
  A consistent description of exclusive photoproduction of mesons at high
momentum transfer t relies on a few effective degrees of freedom which can be
checked against Lattice calculation or more effective models of QCD.


title: Discovering anomaly-mediated supersymmetry at the LHC

abstract:
  The discovery potential of the LHC is investigated for the minimal
anomaly-mediated supersymmetry breaking (mAMSB) scenario, using the ATLAS fast
detector simulator, including track reconstruction and particle identification.
Generic supersymmetry search cuts are used to map the 5-sigma (and >=10 event)
discovery contours in the m_0 - m_3/2 plane. With 100 inverse fb of integrated
luminosity the search will reach up to 2.8 TeV in the squark mass and 2.1 TeV
in the gluino mass. We generalise a kinematical variable and demonstrate that
it is sensitive to the small chargino-LSP mass splitting characteristic of AMSB
models. By identifying tracks from chargino decays we show that the Wino-like
nature of the LSP can be determined for a wide range of chargino lifetimes.


title: L-Particle and Kaluza-Klein World

abstract:
  We present some arguments in favour of that the Kaluza-Klein picture of the
world has been confirmed in the experiments at very low energies where the
nucleon-nucleon dynamics has been studied. Early predicted ${\cal L}$-particle
is related to the new scale of strong nucleon-nucleon forces in the spirit of
Kaluza-Klein approach. It is shown that KK excitations remarkably describe the
experimentally observed mass spectrum of diproton system.


title: CP-Violation in the decay B^0, (B^0)bar -> pi^+ pi^- gamma

abstract:
  The decay (B^0)bar -> pi^+ pi^- gamma has a bremsstrahlung component
determined by the amplitude for (B^0)bar -> pi^+ pi^-, as well as a direct
component determined by the penguin interaction V_tb V^*_td c_7 O_7.
Interference of these amplitudes produces a photon energy spectrum d Gamma/d x
= a/x + b + c_1 x + c_2 x^2 + ... (x = 2 E_gamma/m_B) where the terms c_1,2
contain a dependence on the phase alpha_eff = pi - arg[(V_tb V^*_td)^*
Amp((B^0)bar -> pi^+ pi^-)]. We also examine the angular distribution of these
decays, and show that in the presence of strong phases, an untagged
B^0/(B^0)bar beam can exhibit an asymmetry between the pi^+ and pi^- energy
spectra.


title: Puzzles in Cabibbo-Suppressed Charm Decays

abstract:
  We identify two Cabibbo suppressed $D^+$ decay modes with anomalously high
branching ratios which are not simply explained by any model. All standard
model diagrams that can contribute to these decays are related by symmetries to
diagrams for other decays that do not show any such enhancement. If these high
branching ratios are confirmed by more precise experiments, they may require
new physics to explain them. Anomalies in $D_s$ decays and tests for possible
violation of G-parity are discussed.


title: Symmetries and fermion masses

abstract:
  We discuss whether quark, charged lepton and neutrino masses and mixing
angles may be related by an extended flavour and family symmetry group. We show
that current measurements of all fermion masses and mixing angles are
consistent with a combination of an underlying SU(3) family symmetry together
with a GUT symmetry such as SO(10). In this the near bi-maximal mixing observed
in the neutrino sector is directly related to the small mixing observed in the
quark sector, the difference between quark and lepton mixing angles being due
to the see-saw mechanism. Using this connection we make a detailed prediction
for the lepton mixing angles determining neutrino oscillation phenomena.


title: New results for a photon-photon collider

abstract:
  We present new results from studies in progress on physics at a two-photon
collider. We report on the sensitivity to top squark parameters of MSSM Higgs
boson production in two-photon collisions; Higgs boson decay to two photons;
radion production in models of warped extra dimensions; chargino pair
production; sensitivity to the trilinear Higgs boson coupling; charged Higgs
boson pair production; and we discuss the backgrounds produced by resolved
photon-photon interactions.


abstract:
  We derive the DGLAP and BFKL evolution equations in the N=4 supersymmetric
gauge theory in the next-to-leading approximation. The eigenvalue of the BFKL
kernel in this model turns out to be an analytic function of the conformal spin
|n|. Its analytic continuation to negative |n| in the leading logarithmic
approximation allows us to obtain residues of anomalous dimensions \gamma of
twist-2 operators in the non-physical points j=0,-1,... from the BFKL equation
in an agreement with their direct calculation from the DGLAP equation.
Moreover, in the multi-color limit of the N=4 model the BFKL and DGLAP dynamics
in the leading logarithmic approximation is integrable for an arbitrary number
of particles. In the next-to-leading approximation the holomorphic separability
of the Pomeron hamiltonian is violated, but the corresponding Bethe-Salpeter
kernel has the property of a hermitian separability. The main singularities of
anomalous dimensions \gamma at j=-r obtained from the BFKL and DGLAP equations
in the next-to-leading approximation coincide but our accuracy is not enough to
verify an agreement for residues of subleading poles.


title: Meson Form Factors and Non-Perturbative Gluon Propagators

abstract:
  The meson (pion and kaon) form factor is calculated in the perturbative
framework with alternative forms for the running coupling constant and the
gluon propagator in the infrared kinematic region. These modified forms are
employed to test the sensibility of the meson form factor to the
nonperturbative contributions. Its is a powerful discriminating quantity and
the results obtained with a particular choice of modified running coupling
constant and gluon propagator have a good agreement with the available data,
for both mesons, indicating the robustness of the method of calculation.
Nevertheless, nonperturbative aspects may be included in the perturbative
framework of calculation of exclusive processes.


title: Cosmological Implications of Neutrinos

abstract:
  The lectures describe several cosmological effects produced by neutrinos.
Upper and lower cosmological limits on neutrino mass are derived. The role that
neutrinos may play in formation of large scale structure of the universe is
described and neutrino mass limits are presented. Effects of neutrinos on
cosmological background radiation and on big bang nucleosynthesis are
discussed. Limits on the number of neutrino flavors and mass/mixing are given.


title:
Measuring the CP-violating phase by a long base-line neutrino experiment
  with Hyper-Kamiokande

abstract:
  We study the sensitivity of a long-base-line (LBL) experiment with neutrino
beams from the High Intensity Proton Accelerator (HIPA), that delivers 10^{21}
POT per year, and a proposed 1Mt water-Cherenkov detector, Hyper-Kamiokande
(HK) 295km away from the HIPA, to the CP phase (delta_{M N S}) of the
three-flavor lepton mixing matrix. We examine a combination of the nu_mu
narrow-band beam (NBB) at two different energies, vev{p_pi}=2, 3GeV, and the
bar{nu}_mu NBB at vev{p_pi}=2GeV. By allocating one year each for the two nu_mu
beams and four years for the bar{nu}_mu beam, we can efficiently measure the
nu_mu to nu_e and bar{nu}_mu to bar{nu}_e transition probabilities, as well as
the nu_mu and bar{nu}_mu survival probabilities. CP violation in the lepton
sector can be established at 4sigma (3sigma) level if the MSW
large-mixing-angle scenario of the solar-neutrino deficit is realized, |\dmns|
or |delta{M N S}-180^{circ}| > 30^{circ}, and if 4|U_{e3}|^2 (1-|U_{e3}|^2)
equiv sin^2 2 theta_{CHOOZ} > 0.03 (0.01). The phase delta_{M N S} is more
difficult to constrain by this experiment if there is little CP violation,
delta_{M N S} sim 0^{circ} or 180^{circ}, which can be distinguished at 1sigma
level if sin^2 2 theta_{CHOOZ} >~ 0.01.


title: Scale setting for alpha_s beyond leading order

abstract:
  We present a general procedure for incorporating higher-order information
into the scale-setting prescription of Brodsky, Lepage and Mackenzie. In
particular, we show how to apply this prescription when the leading coefficient
or coefficients in a series in the strong coupling alpha_s are anomalously
small and the original prescription can give an unphysical scale. We give a
general method for computing an optimum scale numerically, within dimensional
regularization, and in cases when the coefficients of a series are known. We
apply it to the heavy quark mass and energy renormalization in lattice NRQCD,
and to a variety of known series. Among the latter, we find significant
corrections to the scales for the ratio of e+e- to hadrons over muons, the
ratio of the quark pole to MSbar mass, the semi-leptonic B-meson decay width,
and the top decay width. Scales for the latter two decay widths, expressed in
terms of MSbar masses, increase by factors of five and thirteen, respectively,
substantially reducing the size of radiative corrections.


title:
UV and IR divergences within Dimensional Regularization in
  Non-Commutative theories and Phenomenological Implications

abstract:
  Using Dimensional Regularization (DR) for some two-point functions of a
prototype Non-Comutative (NC) \phi^4 scalar theory in 4-dimensions, we
explictly analyze, to one-loop, the IR and UV divergences of non-planar
diagrams having quadratic divergences and compare to the case of the
Pauli-Villars cut-off regularization (PVR). We also note that the IR structure
1/p0p obtained from DR is reproduced by PVR in the limit where the UV cut-off
\Lambda is set to infinity. We study the phenomenological implications of this
result by rederiving bounds from low-energy data on the violation of Lorentz
invariance based on the existence of the quadratic divergence. The most
stringent (and regularization independent) bound on Lorentz violation from
low-energy data is 1/\sqrt{\theta}\approx \nu\geq 10^{15} GeV for NCQCD and
10^{10} GeV for NCQED, which comes from the absence of sidereal variations
between the Cs and Hg atomic clocks.


title:
A Consistent Resolution of Possible Anomalies in B^0 --> phi K_S and B^+
  --> eta' K^+ Decays

abstract:
  In the framework of R-parity violating (\rpv) supersymmetry, we try to find a
consistent explanation for both recently measured CP asymmetry in B^0 --> phi
K_S decay and the large branching ratio of B^{+/-} --> eta' K^{+/-} decay,
which are inconsistent with the Standard Model (SM) prediction. We also
investigate other charmless hadronic B --> PP and B --> VP decay modes whose
experimental data favor the SM: for instance, recently measured CP asymmetries
in B^0 --> eta^{prime} K_S and B^0 --> J / Psi K_S. We find that all the
observed data can be accommodated for certain values of \rpv couplings.


title: Radiative corrections and parity nonconservation in heavy atoms

abstract:
  The self-energy and the vertex radiative corrections to the effect of parity
nonconservation in heavy atoms are calculated analytically in orders Z alpha^2
and Z^2 alpha^3 ln(lambda_C/r_0), where lambda_C and r_0 being the Compton
wavelength and the nuclear radius, respectively. The value of the radiative
correction is -0.85% for Cs and -1.41% for Tl. Using these results we have
performed analysis of the experimental data on atomic parity nonconservation.
The obtained values of the nuclear weak charge,
Q_W=-72.90(28)_{exp}(35)_{theor} for Cs, and Q_W=-116.7(1.2)_{exp}(3.4)_{theor}
for Tl, agree with predictions of the standard model. As an application of our
approach we have also calculated analytically dependence of the Lamb shift on
the finite nuclear size.


title: Symmetry Breaking and False Vacuum Decay after Hybrid Inflation

abstract:
  We discuss the onset of symmetry breaking from the false vacuum in generic
scenarios in which the mass squared of the symmetry breaking (Higgs) field
depends linearly with time, as it occurs, via the evolution of the inflaton, in
models of hybrid inflation. We show that the Higgs fluctuations evolve from
quantum to classical during the initial stages. This justifies the subsequent
use of real-time lattice simulations to describe the fully non-perturbative and
non-linear process of symmetry breaking. The early distribution of the Higgs
field is that of a smooth classical gaussian random field, and consists of
lumps whose shape and distribution is well understood analytically. The lumps
grow with time and develop into ``bubbles'' which eventually collide among
themselves, thus populating the high momentum modes, in their way towards
thermalization at the true vacuum. With the help of some approximations we are
able to provide a quasi-analytic understanding of this process.


title:
Photon Production from Nonequilibrium Disoriented Chiral Condensates in
  a Spherical Expansion

abstract:
  We study the production of photons through the non-equilibrium relaxation of
a disoriented chiral condensate formed in the expanding hot central region in
ultra-relativistic heavy-ion collisions. It is found that the expansion
smoothes out the resonances in the process of parametric amplification such
that the non-equilibrium photons are dominant to the thermal photons over the
range 0.2-2 GeV. We propose that to search for non-equilibrium photons in the
direct photon measurements of heavy-ion collisions can be a potential test of
the formation of disoriented chiral condensates.


title: t-->b W h^0 and t-->b W A^0 decays and possible CP violating effects

abstract:
  We study the charged t-->b W h^0 and t-->b W A^0 decays in the framework of
the general two Higgs doublet model, so called model III and beyond. Here, we
take the Yukawa couplings complex and introduce a new complex parameter due to
the physics beyond the model III, to switch on the CP violating effects. We
predict the branching ratios as BR (t--> b W h^0) ~ 10^{-6} and BR (t--> b W
A^0) ~ 10^{-8}. Furthermore, we observe a measurable CP asymmetry, at the order
of 10^{-2}, for both decays.


title: Comment on "First observation of doubly charmed baryon Xi_cc+"

abstract:
  We speculate on a possible interpretation of events selected by the SELEX
collaboration and stress an insufficient evidence for the observation of doubly
charmed baryon.


title: The proton's gluon structure

abstract:
  The proton's gluon structure function at small x is larger than nowadays is
commonly believed


title: Self-Organized Criticality in Particle Production

abstract:
  Self-Organized Criticality paradigm is a plausible picture for hadron
production. A power-law behavior of hadron transverse momentum spectra and an
approximate scaling observed for different hadrons in high energy hadronic
collisions are discussed.


title:
The SM Higgs-boson production in gamma gamma -> h -> bb at the Photon
  Collider at TESLA

abstract:
  Measuring the Gamma(h -> gamma gamma)Br(h -> bb) decay at the photon collider
at TESLA is studied for a Standard Model Higgs boson of mass m_h = 120 GeV. The
main background due to the process gamma gamma -> QQ(g), where Q = b,c, is
estimated using the NLO QCD program (G. Jikia); the results obtained are
compared with the corresponding LO estimate. Using a realistic luminosity
spectrum and performing a detector simulation with the SIMDET program, we find
that the Gamma(h -> gamma gamma)Br(h -> bb) decay can be measured with an
accuracy better than 2% after one year of photon collider running.


title: Little Higgs Models: New Approaches to the Hierarchy Problem

abstract:
  In this note we present a review of the little Higgs models that stabilize
the electroweak by realizing the Standard Model Higgs as a pseudo-Goldstone
boson.