title: Asymmetric jet correlations in p p^\uparrow scattering

abstract:
  We propose that back-to-back correlations in azimuthal angle of jets produced
in collisions of unpolarized with transversely polarized proton beams could be
used to determine Sivers functions. The corresponding single-spin asymmetry is
not power-suppressed, but is subject to Sudakov suppression. We present
estimates of the asymmetry (without and with Sudakov effects) for RHIC at jet
transverse momenta of ~10 GeV and show that it may reach a few per cent or more
and could provide access to the gluon Sivers function.


title:
Theoretical Predictions for the Direct Detection of Supersymmetric Dark
  Matter

abstract:
  We compute the neutralino-nucleon cross section in several supersymmetric
scenarios, taking into account all kind of experimental and astrophysical
constraints. In addition, the constraints that the absence of dangerous charge
and colour breaking minima imposes on the parameter space are also considered.
This computation is relevant for the theoretical analysis of the direct
detection of dark matter in current experiments. We discuss interesting
supergravity and superstring scenarios.


title:
The Parton Structure of the Nucleon and Precision Determination of the
  Weinberg Angle in Neutrino Scattering

abstract:
  A recently completed next-to-leading-order program to calculate neutrino
cross sections, including power-suppressed mass correction terms, has been
applied to evaluate the Paschos-Wolfenstein relation, in order to
quantitatively assess the validity and significance of the NuTeV anomaly. In
particular, we study the shift of $\sin^2 \theta_{\mathrm{W}}$ obtained in
calculations with a new generation of PDF sets that allow $s(x)\neq
\bar{s}(x)$, enabled by recent neutrino dimuon data from CCFR and NuTeV, as
compared to the previous $s = \bar{s}$ parton distribution functions like
CTEQ6M. The extracted value of $\sin^2 \theta_{\mathrm{W}}$ is closely
correlated with the strangeness asymmetry momentum integral
$\int_{0}^{1}x[s(x)-\bar{s}(x)] dx$. We also consider isospin violating effects
that have recently been explored by the MRST group. The results of our study
suggest that the new dimuon data, the Weinberg angle measurement, and other
data sets used in global QCD parton structure analysis can all be consistent
within the Standard Model.


title: Neutrino Dimuon Production and the Strangeness Asymmetry of the Nucleon

abstract:
  We have performed the first global QCD analysis to include the CCFR and NuTeV
dimuon data, which provide direct constraints on the strange and anti-strange
parton distributions, $s(x)$ and $\bar{s}(x)$. To explore the strangeness
sector, we adopt a general parametrization of the non-perturbative $s(x),
\bar{s}(x)$ functions satisfying basic QCD requirements. We find that the
strangeness asymmetry, as represented by the momentum integral $[S^{-}]\equiv
\int_0^1 x [s(x)-\bar{s}(x)] dx$, is sensitive to the dimuon data provided the
theoretical QCD constraints are enforced. We use the Lagrange Multiplier method
to probe the quality of the global fit as a function of $[S^-]$ and find
$-0.001 < [S^-] < 0.004$. Representative parton distribution sets spanning this
range are given. Comparisons with previous work are made.


title: Higgsless Electroweak Symmetry Breaking from Theory Space

abstract:
  We investigate unitarity of $W^+W^-$ scattering in the context of theory
space models of the form $U(1)\times {[SU(2)]}^N\times SU(2)_{N+1}$, which are
broken down to $U(1)_{EM}$ by non-linear $\Sigma$ fields, without the presence
of a physical Higgs Boson. By allowing the couplings of the U(1) and the final
$SU(2)_{N+1}$ to vary, we can fit the $W$ and $Z$ masses, and we find that the
coefficient of the term in the amplitude that grows as $E^2/m_W^2$ at high
energies is suppressed by a factor of $(N+1)^{-2}$. In the $N+1\to\infty$ limit
the model becomes a 5-dimensional SU(2) gauge theory defined on an interval,
where boundary terms at the two ends of the interval break the SU(2) down to
$U(1)_{EM}$. These boundary terms also modify the Kaluza-Klein (KK) mass
spectrum, so that the lightest KK states can be identified as the $W$ and $Z$
bosons. The $T$ parameter, which measures custodial symmetry breaking, is
naturally small in these models. Depending on how matter fields are included,
the strongest experimental constraints come from precision electroweak limits
on the $S$ parameter.


title: A Naturally Narrow Positive Parity Theta^+

abstract:
  We present a consistent color-flavor-spin-orbital wave function for a
positive parity Theta^+ that naturally explains the observed narrowness of the
state. The wave function is totally symmetric in its flavor-spin part and
totally antisymmetric in its color-orbital part. If flavor-spin interactions
dominate, this wave function renders the positive parity Theta^+ lighter than
its negative parity counterpart. We consider decays of the Theta^+ and compute
the overlap of this state with the kinematically allowed final states. Our
results are numerically small. We note that dynamical correlations between
quarks are not necessary to obtain narrow pentaquark widths.


title:
Pentaquark $\Theta^*$ States in {27} Baryon Multiplet from Chiral
  Soliton Model

abstract:
  We estimate the mass and the width of pentaquark $\Theta^*$ states in the
27-plet from chiral soliton models. The calculations show that the mass of
$\Theta^*$ is about 1.60 GeV and the width for the process $\Theta^*\to {KN}$
is less than 43 MeV. We also discuss the search for the existence of $\Theta^*$
states in physical processes.


title:
The Gauge Dependence of Imaginary Part of physical amplitude $W^{+}\to
  u_i \bar{d}_j$ in Quark Mixing Matrix Renormalization

abstract:
  We investigate the current renormalization prescriptions of quark mixing
matrix and found that there is gauge dependence in the imaginary part of
physical amplitude $W^{+}\to u_i \bar{d}_j$ in two main renormalization
prescriptions. Our conclusion may affect the renormalization of the quark
mixing matrix and indicates that it needs more investigation about the gauge
independence in quark mixing matrix renormalization.


title:
Dynamical chiral-symmetry breaking at T=0 and $T \ne 0$ in the
  Schwinger-Dyson equation with lattice QCD data

abstract:
  For the study of dynamical chiral-symmetry breaking (DCSB) in QCD, we
investigate the Schwinger-Dyson (SD) formalism based on lattice QCD data. From
the quenched lattice data for the quark propagator in the Landau gauge, we
extract the SD kernel function K(p^2), which is the product of the quark-gluon
vertex and the polarization factor in the gluon propagator, in an
Ansatz-independent manner. We find that the SD kernel function K(p^2) exhibits
infrared vanishing and a large enhancement at the intermediate-energy region
around p \sim 0.6GeV. We investigate the relation between the SD kernel and the
quark mass function, and find that the infrared and intermediate energy region
(0.35GeV<p<1.5GeV) would be relevant for DCSB. We apply the lattice-QCD-based
SD equation to thermal QCD, and calculate the quark mass function at the finite
temperature. Spontaneously broken chiral symmetry is found to be restored at
the high temperature above 100MeV.


title:
Neutrino Mass Matrix in the Minimal Supergravity Model: Bi-large Mixing
  with Trilinear R-parity Violation

abstract:
  We study the correlation between the neutrino oscillation and the
production/decay of the lightest supersymmetric particle(LSP) in the context of
the minimal supergravity model(mSUGRA) without R-parity. We show how the
neutrino masses and mixing which are consistent with the recent neutrino data
can be obtained in this model, and describe how to probe the model by observing
the LSP decay at collider experiments. It is shown that the generic 1-loop
contributions to neutrino masses are too small to account for the solar and
atmospheric neutrino oscillations and thus some fine cancellation in tree-level
contribution is required to severely constrain the viable parameter space. In
most parameter space of mSUGRA, the neutralino or the stau is LSP. Examining
both cases, we find that there is a simple correlation between the neutrino
mixing angles and the LSP branching ratios in the small $\tan\beta$ region so
that the model can be clearly tested in the future colliders. In the large
$\tan\beta$ region, such a correlation is obscured by the large tau Yukawa
contribution which makes it nontrivial to test the model.


title: Quark mixing from softly broken symmetries

abstract:
  Quark flavor mixing may originate in the soft breaking of horizontal
symmetries. Those symmetries, which in the simplest case are three family U(1)
groups, are obeyed only by the dimension-4 Yukawa couplings and lead, when
unbroken, to the absence of mixing. Their breaking may arise from the
dimension-3 mass terms of SU(2)-singlet vector-like quarks. Those gauge-singlet
mass terms break the horizontal symmetries at a scale much higher than the
Fermi scale, yet softly, leading to quark mixing while the quark masses remain
unsuppressed.


title: Effective theory approach to unstable particle production

abstract:
  Using the hierarchy of scales between the mass, $M$, and the width, $\Gamma$,
of a heavy, unstable particle we construct an effective theory that allows
calculations for resonant processes to be systematically expanded in powers of
the coupling $\alpha$ and $\Gamma/M$. We illustrate the method by computing the
next-to-leading order line shape of a scalar resonance in an abelian
gauge-Yukawa model.


title: Modified instanton profile effects from lattice Green functions

abstract:
  We trace here instantons through the analysis of pure Yang-Mills gluon Green
functions in the Landau gauge for a window of IR momenta (0.4 GeV $< k < 0.9$
GeV). We present lattice results that can be fitted only after substituting the
BPST profile in the Instanton liquid model (ILM) by one based on the Diakonov
and Petrov variational methods. This also leads us to gain information on the
parameters of ILM.


title: Small x Phenomenology: Summary and status 2002

abstract:
  A second workshop on small x physics, within the Small x Collaboration, was
held in Lund in June 2002 with the aim of over-viewing recent theoretical
progress in this area and summarizing the experimental status.
  This paper is dedicated to the memory of Jan Kwiecinski, who died
unexpectedly on August 29, 2003.


title: A compact representation of the 2 photon 3 gluon amplitude

abstract:
  A compact representation of the loop amplitude gamma gamma ggg -> 0 is
presented. The result has been obtained by using helicity methods and sorting
with respect to an irreducible function basis. We show how to convert spinor
representations into a field strength representation of the amplitude. The
amplitude defines a background contribution for Higgs boson searches at the LHC
in the channel H -> gamma gamma + jet which was earlier extracted indirectly
from the one-loop representation of the 5-gluon amplitude.


title: Mirror World and its Cosmological Consequences

abstract:
  We briefly review the concept of a parallel `mirror' world which has the same
particle physics as the observable world and couples to the latter by gravity
and perhaps other very weak forces. The nucleosynthesis bounds demand that the
mirror world should have a smaller temperature than the ordinary one. By this
reason its evolution should substantially deviate from the standard cosmology
as far as the crucial epochs like baryogenesis, nucleosynthesis etc. are
concerned. In particular, we show that in the context of certain baryogenesis
scenarios, the baryon asymmetry in the mirror world should be larger than in
the observable one. Moreover, we show that mirror baryons could naturally
constitute the dominant dark matter component of the Universe, and discuss its
cosmological implications.


title: Sudakov Form Factors

abstract:
  The theory of the on-shell Sudakov form factor to all order of logarithms is
explained.


title:
Bounds on gamma from CP violation measurements in B -> pi+ pi- and B ->
  psi K_S

abstract:
  We study the determination of gamma from CP-violating observables in B -> pi+
pi- and B -> psi K_S. This determination requires theoretical input to one
combination of hadronic parameters. We show that a mild assumption about this
quantity may allow bounds to be placed on gamma, but we stress the pernicious
effects that an eightfold discrete ambiguity has on such an analysis. The
bounds are discussed as a function of the direct (C) and interference (S)
CP-violating observables obtained from time-dependent B -> pi+ pi- decays, and
their behavior in the presence of new physics effects in B-Bbar mixing is
studied. (V2: Misprints corrected. Slightly improved discussion.)


title: Scalar meson dynamics in Chiral Perturbation Theory

abstract:
  A comparison of the linear sigma model (L$\sigma$M) and Chiral Perturbation
Theory (ChPT) predictions for pion and kaon dynamics is presented. Lowest and
next-to-leading order terms in the ChPT amplitudes are reproduced if one
restricts to scalar resonance exchange. Some low energy constants of the order
$p^4$ ChPT Lagrangian are fixed in terms of scalar meson masses. Present values
of these low energy constants are compatible with the L$\sigma$M dynamics. We
conclude that more accurate values would be most useful either to falsify the
L$\sigma$M or to show its capability to shed some light on the controversial
scalar physics.


title: Constraints on Large Extra Dimensions with Bulk Neutrinos

abstract:
  We consider right-handed neutrinos propagating in $\delta$ (large) extra
dimensions, whose only coupling to Standard Model fields is the Yukawa coupling
to the left-handed neutrino and the Higgs boson. These theories are attractive
as they can explain the smallness of the neutrino mass, as has already been
shown. We show that if $\delta$ is bigger than two, there are strong
constraints on the radius of the extra dimensions, resulting from the
experimental limit on the probability of an active state to mix into the large
number of sterile Kaluza-Klein states of the bulk neutrino. We also calculate
the bounds on the radius resulting from requiring that perturbative unitarity
be valid in the theory, in an imagined Higgs-Higgs scattering channel.


title: Photon and its hadronic interaction

abstract:
  A short overview of basics aspects of hadronic interaction of the photon is
presented.


title: ECFA-Summary: Higgs, gamma-gamma and e-gamma physics

abstract:
  Recent results obtained within ECFA/DESY and ECFA Study by the Higgs and
gamma gamma /e gamma physics working groups are presented.


title: Central Higgs Production at LHC from Single-Pomeron-Exchange

abstract:
  Contrary to common perceptions about systems produced in
Single-Pomeron-Exchange (SPE) pp interactions, the hard diffractive process
discovered at the CERN SPS-Collider leads to dominant central production of
Higgs bosons at the LHC. The rate for SPE production of Higgs bosons is
calculated to be 7-9 % of the total inclusive Higgs rate. In addition, an SPE
measurement program of dijet events is outlined for the early days of LHC
running which should answer many fundamental questions about the Pomeron
structure and its effective flux factor in the proton.


title: Soliton solutions of Chiral Born-Infeld Theory and baryons

abstract:
  Finite-energy topological spherically symmetrical solutions of Chiral
Born-Infeld Theory are studied. Properties of these solution are obtained, and
a possible physical interpretation is also given. We compute static properties
of baryons (mass,main radius, magnetic main radius, axial coupling constant)
whose solutions can be interpreted as the baryons of QCD.


title:
Prospects for Pentaquark Searches in $e^+e^-$ Annihilations and
  $\gamma\gamma$ Collisions

abstract:
  Recent strong experimental evidence of a narrow exotic S = +1 baryon
resonance, $\Theta^+$, suggests the existence of other exotic baryons. We
discuss the prospects of confirming earlier experimental evidence of $\Theta^+$
and the observation of additional hypothetical exotic baryons in $e^+e^-$
annihilations and $\gamma\gamma$ collisions at LEP and B Factories.


title: Neutrino Oscillations, Fluctuations and Solar Magneto-gravity Waves

abstract:
  This review has two parts. The first part summarizes the current
observational constraints on fluctuations in the solar medium deep within the
solar Radiative Zone, and shows how the KamLAND and SNO-salt data combine to
make the experimental determination of the neutrino oscillation parameters
largely insensitive to prior assumptions about the nature of these
oscillations. As part of a search for plausible sources of solar fluctuations
to which neutrinos could be sensitive, the second part of the talk summarizes a
preliminary analysis of the influence of magnetic fields on helioseismic waves.
Using simplifying assumptions which should apply to modes in the solar
radiative zone, we find a resonance between Alfven waves and helioseismic
g-modes which potentially modifies the solar density profile fairly
significantly over comparatively short distance scales, too narrow to be ruled
out by present-day analyses of p-wave helioseismic spectra.


title: The pion nucleon coupling constant and the Goldberger-Treiman relation

abstract:
  The latest $\pi N$ elastic scattering data are re-analysed to determine the
coupling constant $g_c$ of the charged pion, using the dispersion relation for
the invariant amplitude $B^{(+)}$. Depending on the choice of data-base, values
$g^2_c/4\pi = 13.80$ to 13.65 are obtained with errors of $\pm 0.12$. We
re-examine the well known discrepancy with the Goldberger-Treiman relation.
After allowing for the mass dependence of the pion decay constant $f_\pi$, a
(2-3)% discrepancy is predicted, hence $g^2_c/4\pi = 13.74 \pm 0.10$ in the
prior case.
  The mass difference between charge states of $\Delta (1232)$ is $M^0 -M^{++}
= 2.0 \pm 0.4$ MeV, close to twice the mass difference between neutron and
proton. The difference in widths on resonance is $\Gamma ^0 - \Gamma ^{++} =3.8
\pm 1.0$ MeV. One may account for a width difference of 4.5 MeV from phase
space for decays and the extra channel $\Delta ^0 \to \gamma n$.


title:
Ferromagnetism and Superconductivity in Quark Matter - Color magnetic
  superconductivity -

abstract:
  A coexistent phase of spin polarization and color superconductivity in
high-density QCD is studied at zero temperature. The axial-vector self-energy
stemming from the Fock exchange term of the one-gluon-exchange interaction has
a central role to cause spin polarization. As a significant feature, the Fermi
surface is deformed by the axial-vector self-energy and then rotation symmetry
is spontaneously broken down. The gap function results in being anisotropic in
the momentum space in accordance with the deformation. It is found that spin
polarization barely conflicts with color superconductivity, and almost coexists
with it.


title:
Double polarization asymmetry as a possible filter for $\Theta^+$'s
  parity

abstract:
  We present an analysis of the Beam-Target double polarization asymmetry for
the photoproduction of $\Theta^+$ in $\gamma n\to \Theta^+ K^-$. We show that
this quantity can serve as a filter for the determination of the $\Theta^+$'s
spin-parity assignment near threshold. It is highly selective between $1/2^+$
and $1/2^-$ configurations due to dynamical reasons.


title: Bag formation in Chiral Born-Infeld Theory

abstract:
  The "bag"-like spherically symmetrical solutions of the Chiral Born-Infeld
theory are studied. The properties of these solutions are obtained and a
possible physical interpretation is also discussed.


title:
Probing Neutralino Resonance Annihilation via Indirect Detection of Dark
  Matter

abstract:
  The lightest neutralino of R-parity conserving supersymmetric models serves
as a compelling candidate to account for the presence of cold dark matter in
the universe. In the minimal supergravity (mSUGRA) model, a relic density can
be found in accord with recent WMAP data for large values of the parameter
$\tan\beta$, where neutralino annihilation in the early universe occurs via the
broad s-channel resonance of the pseudoscalar Higgs boson $A$. We map out rates
for indirect detection of neutralinos via 1. detection of neutrinos arising
from neutralino annihilation in the core of the earth or sun and 2. detection
of gamma rays, antiprotons and positrons arising from neutralino annihilation
in the galactic halo. If indeed $A$-resonance annihilation is the main sink for
neutralinos in the early universe, then signals may occur in the gamma ray,
antiproton and positron channels, while a signal in the neutrino channel would
likely be absent. This is in contrast to the hyperbolic branch/focus point
(HB/FP) region where {\it all} indirect detection signals are likely to occur,
and also in contrast to the stau co-annihilation region, where {\it none} of
the indirect signals are likely to occur.


title: Possibility of color magnetic superconductivity

abstract:
  Two aspects of quark matter at high density are addressed: one is color
superconductivity and the other is ferromagnetism. We are mainly concerned with
the latter and its relation to color superconductivity, which we call "color
magnetic superconductivity". The relation of ferromagnetism and chiral symmetry
restoration is also discussed.


title: Elliptic flow orientation, saturation and low $p_t$ behavior

abstract:
  We consider general model with factorization between macroscopic flow and
matter decay distribution. We show universality of $p_t^2$ behavior of elliptic
flow at small $p_t$ for identified final particles in the symmetric nucleus
collision. At high $p_t$ we compare non-relativistic and relativistic models
for boosted decay distribution. In the relativistic models with distribution
having power-like tail we show existence of elliptic flow saturation. This
means that the elliptic flow value $v_2$ tend to constant at high $p_t$. We
discuss the importance of determination of elliptic flow orientation which can
help us to compare different models. For example, we introduce potential
expansion model which can reproduce azimuthal asymmetry but based on the
assumption that there are only cold strong forces and no thermalization. This
model show opposite sign of elliptic flow orientation in comparison with
thermal model. We also show that at small $p_t$ sign of elliptic flow can
change due to sign of second derivative of decay distribution. This fact tell
us that we must more carefully link elliptic flow sign and properties of the
model.


title: Vector meson photoproduction and problem of gauge invariance

abstract:
  We discuss the problem of gauge invariance of the vector meson
photoproduction at small $x$ within the two-gluon exchange model. It is found
that the gauge invariance is fulfilled if one includes the graphs with higher
Fock states in the meson wave function. Obtained results are used to estimate
the amplitudes with longitudinal and transverse photon and vector meson
polarization.


title: Chiral multiplets of excited mesons

abstract:
  It is shown that experimental meson states with spins J=0,1,2,3 in the energy
range 1.9 - 2.4 GeV obtained in recent partial wave analysis of
proton-antiproton annihilation at LEAR remarkably confirm all predictions of
chiral symmetry restoration. Classification of excited $\bar q q$ mesons
according to the representations of chiral $U(2)_L \times U(2)_R$ group is
performed. There are two important predictions of chiral symmetry restoration
in highly excited mesons: (i) physical states must fill out approximately
degenerate parity-chiral multiplets; (ii) some of the physical states with the
given $I,J^{PC}$ are members of one parity-chiral multiplet, while the other
states with the same $I,J^{PC}$ are members of the other parity-chiral
multiplet. For example, while some of the excited $\rho(1,1^{--})$ states are
systematically degenerate with $a_1(1,1^{++})$ states forming (0,1)+(1,0)
chiral multiplets, the other excited $\rho(1,1^{--})$ states are degenerate
with $h_1(0,1^{+-})$ states ((1/2,1/2) chiral multiplets). Hence, one of the
predictions of chiral symmetry restoration is that the combined amount of
$a_1(1,1^{++})$ and $h_1(0,1^{+-})$ states must coincide with the amount of
$\rho(1,1^{--})$ states in the chirally restored regime. It is shown that the
same rule applies (and experimentally confirmed) to many other meson states.


title: Exact solutions of the QCD evolution equations using Monte Carlo method

abstract:
  We present the exact and precise (~0.1%) numerical solution of the QCD
evolution equations for the parton distributions in a wide range of $Q$ and $x$
using Monte Carlo (MC) method, which relies on the so-called Markovian
algorithm. We point out certain advantages of such a method with respect to the
existing non-MC methods. We also formulate a challenge of constructing
non-Markovian MC algorithm for the evolution equations for the initial state
QCD radiation with tagging the type and $x$ of the exiting parton. This seems
to be within the reach of the presently available computer CPUs and the
sophistication of the MC techniques.


title: Superfield Realizations of Lorentz Violation

abstract:
  Lorentz-violating extensions of the Wess-Zumino model have been formulated in
superspace. The models respect a supersymmetry algebra and can be understood as
arising from suitably modified superspace transformations.


title:
Flavor Structure of Scherk-Schwarz Supersymmetry Breaking for
  Quasi-Localized Matter Field

abstract:
  We discuss the flavor structure of soft supersymmetry breaking parameters in
5-dimensional orbifold field theories in which N=1 supersymmetry is broken by
the Scherk-Schwarz boundary condition and hierarchical 4-dimensional Yukawa
couplings are obtained by quasi-localizing the matter fields in extra
dimension. In such theories, the resulting soft scalar masses and trilinear
scalar couplings at the compactification scale are highly flavor-dependent, but
appropriately suppressed in correlation with Yukawa couplings. Those flavor
violations can give interesting phenomenological consequences at low energies
as well as constrain the mechanism of Yukawa coupling generation.


title: Extension to the Super-Weyl-K{\" a}hler Symmetry in Anomaly Mediation

abstract:
  Anomaly mediation mechanism of supersymmetry breaking is known to have an
unsatisfactory aspect which is often referred to as the tachyonic slepton
problem. A possible way out of this difficulty is investigated by considering
the mediation mechanism not only of the super-Weyl but of K{\" a}hler part of
anomaly. A new formula for the scalar mass squared is presented by including
the effect of the K{\" a}hler anomaly. On the basis of the new formulae, the
gauge non-singlet scalar mass squared is shown to be positive provided that the
superpotential in the hidden sector satisfies a certain condition. The gauge
singlet scalar mass squared may also be positive if we consider the threshold
correction.


title: An NLO calculation of the electroproduction of large-E_\bot hadrons

abstract:
  We present a Next-to-Leading Order calculation of the cross section for the
leptoproduction of large-$E_{\bot}$ hadrons and we compare our predictions with
H1 data on the forward production of $\pi^0$. We find large higher order
corrections and an important sensitivity to the renormalization and
factorization scales. These large corrections are shown to arise in part from
BFKL-like diagrams at the lowest order.


title: Pseudogap of Color Superconductivity

abstract:
  We show that the pseudogap of the quark density of states is formed in hot
quark matter as a precursory phenomenon of the color superconductivity on the
basis of a low-energy effective theory. We clarify that the soft mode of the
di-quark pair field gives rise to a peculiar behavior of the quark dispersion
relation and a short life-time of the quasiparticles near the Fermi surface,
both of which make a depression of the density of states of quarks. Our result
suggests that the appearance of the pseudogap is a universal phenomenon of
strong coupling superconductors, irrespective of the dimensionality.


title: Squark and slepton masses as probes of supersymmetric SO(10) unification

abstract:
  We carry out an analysis of the non-universal supersymmetry breaking scalar
masses arising in SO(10) supersymmetric unification. By considering patterns of
squark and slepton masses, we derive a set of sum rules for the sfermion masses
which are independent of the manner in which SO(10) breaks to the Standard
Model gauge group via its SU(5) subgroups. The phenomenology arising from such
non-universality is unaffected by the symmetry breaking pattern, so long as the
breaking occurs via any of the SU(5) subgroups of the SO(10) group.


title: Magnetic Moments of $J^P={3/2}^+$ Pentaquarks

abstract:
  If the $J^P$ of $\Theta_5^+$ and $\Xi_5^{--}$ pentaquarks is really found to
be ${1\over 2}^+$ by future experiments, they will be accompanied by
$J^P={3\over 2}^+$ partners in some models. It is reasonable to expect that
these $J^P={3\over 2}^+$ states will also be discovered in the near future with
the current intensive experimental and theoretical efforts. We estimate
$J^P={3/2}^+$ pentaquark magnetic moments using different models.


title: Melting Pattern of Diquark Condensates in Quark Matter

abstract:
  Thermal color superconducting phase transitions in high density three-flavor
quark matter are investigated in the Ginzburg-Landau approach. Effects of
nonzero strange quark mass, electric and color charge neutrality, and direct
instantons are considered. Weak coupling calculations show that an interplay
between the mass and electric neutrality effects near the critical temperature
gives rise to three successive second-order phase transitions as the
temperature increases: a modified color-flavor locked (mCFL) phase (ud, ds, and
us pairings) -> a ``dSC'' phase (ud and ds pairings) -> an isoscalar pairing
phase (ud pairing) -> a normal phase (no pairing). The dSC phase is novel in
the sense that while all eight gluons are massive as in the mCFL phase, three
out of nine quark quasiparticles are gapless.


title: BEC for photons and neutral pions

abstract:
  The role of BEC for photons and neutral pions is briefly discussed and
illustrated by means of new method of numerical modelling of BEC proposed by us
recently.


title:
Causality Aspects of the Parton Cascade Approach to Ultarelativistic
  Heavy Ion Reactions

abstract:
  Parton cascade models have been surprisingly successful in describing
heavy-ion reactions at RHIC energies -- surprising because in spite of their
QCD bells and whistles, they essentially embody classical many-particle
dynamics. The procedure to determine the sequence of the binary parton
interactions, however -- an essential aspect of all such models -- is by
necessity a phenomenological (and somewhat arbitrary) feature of these codes.
This has been recognized early on as a serious drawback of non-covariant
cascade models.
  While in the Poincare-Covariant Parton Cascade code "pcpc" the interaction
sequence is determined covariantly and thus is independent of the frame of
reference in which the code is run, this alone does not solve the basic
causality problems raised by such classical models.
  We discuss in detail all aspects of (Einstein) causality encountered in such
parton cascade models.


title:
Subleading shape function contributions to the hadronic invariant mass
  spectrum in B -> X_u l \nu decay

abstract:
  We study the O(Lambda/mb) corrections to the singly and doubly differential
hadronic invariant mass spectra d\Gamma/dsH and d\Gamma/dsH dq^2 in b -> u
decays, and discuss the implications for the extraction of the CKM matrix
element |Vub|. Using simple models for the subleading shape functions, the
effects of subleading operators are estimated to be at thefew percent level for
experimentally relevant cuts. The subleading corrections proportional to the
leading shape function are larger, but largely cancel in the relation between
the hadronic invariant mass spectrum and the photon spectrum in B -> X_s
\gamma. We also discuss the applicability of the usual prescription of
convoluting the partonic level rate with the leading light-cone wavefunction of
the b quark to subleading order.


title: Light-quark dynamics

abstract:
  I present introductory lectures on the use of effective field theory methods
in QCD at low energies.


title: Entanglement in condensates involving strong interactions

abstract:
  We look at two well known examples of interacting systems relating to
condensed matter in which we put the strong interacting parameters. At high
quark chemical potentials and low temperatures we study the entropy arising
from the excitation in the BCS model of superconductivity and the Bose-Einstein
condensation (BEC) of colored quark pairs. We compare it with the ground state
entropy for a system consisting of two colored quarks. In the BCS model we
found that the entropy strongly depends on the energy gap. Both for the very
small values of the momenta as well as those much greater than the
characterizing Fermi momentum $p_f$, the ground state entropy is dominant. For
the BEC case we suggest a phenomenological model to build up colored bosonic
quark pairs. Here the entropy entirely depends upon the short ranged repulsive
interactions between the quark pairs and vanishes for large momenta.


title: Systematics of Exotic Cascade Decays

abstract:
  Theoretical considerations prompted by discovery of the exotic Theta(uudds*)
baryon led us to propose a dynamical picture emphasizing the role of diquark
correlations, which are also useful in elucidating other aspects of low-energy
QCD. A notable prediction of this picture is the existence of new exotic and
non-exotic S=-2 ``cascade'' baryons with specific, characteristic properties.
We argue here that recent observations by the NA49 collaboration are broadly
consistent with our predictions, and propose further tests.


title: Multipomeron quasi-eikonal model for single diffraction processes

abstract:
  Single diffraction processes was usually treated in the triple-reggeon
framework, but this formalism is inconsistent with CDF data. In this paper we
show, that multipomeron quasi-eikonal model gives agreement with these data.
Cross-section of single diffraction processes at LHC energy is estimated.


title:
Phase structures of strong coupling lattice QCD with finite baryon and
  isospin density

abstract:
  Quantum chromodynamics (QCD) at finite temperature (T), baryon chemical
potential (\muB) and isospin chemical potential (\muI) is studied in the strong
coupling limit on a lattice with staggered fermions. With the use of large
dimensional expansion and the mean field approximation, we derive an effective
action written in terms of the chiral condensate and pion condensate as a
function of T, \muB and \muI. The phase structure in the space of T and \muB is
elucidated, and simple analytical formulas for the critical line of the chiral
phase transition and the tricritical point are derived. The effects of a finite
quark mass (m) and finite \muI on the phase diagram are discussed. We also
investigate the phase structure in the space of T, \muI and m, and clarify the
correspondence between color SU(3) QCD with finite isospin density and color
SU(2) QCD with finite baryon density. Comparisons of our results with those
from recent Monte Carlo lattice simulations on finite density QCD are given.


title:
The role of sigma(e+e- -> hadrons) in precision tests of the Standard
  Model

abstract:
  I present a summary of recent developments as they have been discussed in the
many interesting contributions to the workshop SIGHAD03 at Pisa.


title: Analytical approach to chiral symmetry breaking in Minkowsky space

abstract:
  The mass gap equation for spontaneous chiral symmetry breaking is studied
directly in Minkowsky space. In hadronic physics, spontaneous chiral symmetry
breaking is crucial to generate a constituent mass for the quarks, and to
produce the Partially Conserved Axial Current theorems, including a small mass
for the pion. Here a class of finite kernels is used, expanded in Yukawa
interactions. The Schwinger-Dyson equation is solved with an analytical
approach. This improves the state of the art of solving the mass gap equation,
which is usually solved with the equal-time approximation or with the Euclidean
approximation. The mapping from the Euclidean space to the Minkowsky space is
also illustrated.


title: Tree-level unitarity constraints in the 2HDM with CP-violation

abstract:
  We obtain tree-level unitarity constraints for the Two Higgs Doublet Model
(2HDM) with explicit CP-violation. We limit ourselves to the case with soft
violation of the discrete Z_2 symmetry of theory. The key role is played by the
rephasing invariance of the 2HDM lagrangian. Our simple approach for derivation
of these constraints can be easily transferred to other forms of Higgs sector.
We briefly discuss correspondence between possible violation of tree level
unitarity limitation and physical content of theory.


title: Effective Lagrangians for QCD, Duality and Exact Results

abstract:
  I briefly discuss effective Lagrangians for strong interactions while
concentrating on two specific lagrangians for QCD at large matter density. I
then introduce spectral duality in QCD a la Montonen and Olive. The latter is
already present in QCD in the hadronic phase. However it becomes transparent at
large chemical potential. Finally I show the relevance of having exact non
perturbative constraints such as t'Hooft anomaly conditions at zero and nonzero
quark chemical potential on the possible phases of strongly interacting matter.
An important outcome is that for three massless quarks at any chemical
potential the only non trivial solution of the constraints is chiral symmetry
breaking. This also shows that for three massless flavors at large quark
chemical potential CFL is the ground state.


title:
Extraction of the pion-nucleon sigma-term from the spectrum of exotic
  baryons

abstract:
  The pion nucleon sigma-term is extracted on the basis of the soliton picture
of the nucleon from the mass spectrum of usual and the recently observed exotic
baryons, assuming that they have positive parity. The value found is consistent
with that inferred by means of conventional methods from pion nucleon
scattering data. The study can also be considered as a phenomenological
consistency check of the soliton picture of baryons.


title: Loop level lepton flavor violation at linear colliders

abstract:
  We present a study of loop-level lepton flavor vioalting signals in models
with heavy Majorana neutrinos and in the supersymmetric extension of the
standard model. The attention is focused to the $e^- e^-$ option of the next
generation of linear colliders and its potential of discovering new physics is
emphasized.


title: The Soft Supersymmetry-Breaking Lagrangian: Theory and Applications

abstract:
  After an introduction recalling the theoretical motivation for low energy
(100 GeV to TeV scale) supersymmetry, this review describes the theory and
experimental implications of the soft supersymmetry-breaking Lagrangian of the
general minimal supersymmetric standard model (MSSM). Extensions to include
neutrino masses and nonminimal theories are also discussed. Topics covered
include models of supersymmetry breaking, phenomenological constraints from
electroweak symmetry breaking, flavor/CP violation, collider searches, and
cosmological constraints including dark matter and implications for
baryogenesis and inflation.


title: Degenerate Neutrinos and CP Violation

abstract:
  We have studied mixing and masses of three left handed Majorana neutrinos in
the model, which assumes exactly degenerate neutrino masses at some "neutrino
unification" scale. Such a simple theoretical ansatz naturally leads to
quasidegenerate neutrinos. The neutrino mass splittings induced by
renormalization effects. In the model we found that the parameters of the
neutrino physics (neutrino mass spectrum, mixing angles and CP violation
phases) are strongly intercorrelated to each other. From these correlations we
got strong bounds on the parameters which could be checked in the oscillation
experiments.


title: Masses and magnetic moments of pentaquarks

abstract:
  We discuss the spectroscopy of pentaquarks. The quantum numbers of the ground
state depend on the interplay between spin-flavor and orbital contributions to
the energy. The magnetic moments of the lowest pentaquark state with negative
and positive parity are found to be 0.382 \mu_N and 0.089 \mu_n, respectively.


title: The influence of strong magnetic field on photon-neutrino reactions

abstract:
  The two-photon two-neutrino interaction induced by magnetic field is
investigated. In particular the processes $\gamma \gamma \to \nu \bar \nu$ and
$\gamma \to \gamma \nu \bar \nu$ are studied in the presence of strong magnetic
field. An effective Lagrangian and partial amplitudes of the processes are
presented. Neutrino emissivities due to the reactions $\gamma \gamma \to \nu
\bar \nu$ and $\gamma \to \gamma \nu \bar \nu$ are calculated taking into
account of the photon dispersion and large radiative corrections. A comparison
of the results obtained with previous estimations and another inducing
mechanisms of the processes under consideration is made.


title: Impact of Fermion Mass Degeneracy on Flavor Mixing

abstract:
  We carry out a systematic analysis of flavor mixing and CP violation in the
conceptually interesting limit where two quarks or leptons of the same charge
are degenerate in mass. We pay some particular attention to the impact of
neutrino mass degeneracy and Majorana phase degeneracy on the lepton flavor
mixing matrix.


title:
The Restraint of Breit-wigner Formula on Fermion Wave-function
  Renormalization

abstract: This manuscript has been withdrawn due to less meaning.


title: Quick View on Jet Tomography at RHIC Energies

abstract:
  A strong suppression of Pi production in Au+Au collision was discovered at
RHIC energies in the high-p_T region. The lack of this suppression in d+Au
collision proved, this effect can be connected to final state effects, namely
medium induced jet energy loss caused by dense color matter. Here we display
our quantitative results on jet quenching in Au+Au collision using our
pQCD-based parton model calculations. In parallel we present results on d+Au
collision.


title: Rotating Black Holes at Future Colliders

abstract:
  We consider the production and decay of TeV-scale black holes. Evaluation of
the production cross section of higher dimensional rotating black holes is
made. The master field equation for general spin-$s$ fields confined on brane
world is derived. For five-dimensional (Randall-Sundrum) black holes, we obtain
analytic formulae for the greybody factors in low frequency expansion.


title:
Thermal QCD Deconfinement Phase Transition in a Finite Volume within the
  Color-Singletness Condition

abstract:
  We study the finite size effects on the thermal deconfinement phase
transition from the hadronic gas phase to the QGP phase, using a simple
thermodynamic model based on the coexistence of confined and deconfined phases
in a finite volume. We first consider the bag model partition function for the
QGP, then we include the necessary color singletness condition. By probing the
behavior of some physical quantities on the hole range of temperature, it turns
out that in a finite size system, all singularities occuring in these
quantities in the thermodynamic limit are smoothed out, and the phase
transition is then rounded over a broadened critical region, with an additional
shifting effect of the critical point induced by the exact color singletness
requirement. An analysis of the finite size scaling behavior at criticality of
some characteristic quantities allows us to determine the scaling critical
exponents characterizing the thermal deconfinement phase transition. The
obtained results are in good agreement with those predicted by other studies
for a first-order phase transition


title: `Effective' Pomeron model at large $\mathbf{b}$

abstract:
  In this paper we consider the influence of non-perturbative corrections on
the large $ b $ (impact parameter) behavior of the BFKL amplitude. This is done
in the framework of a model where such ``soft'' corrections are taken into
account in the BFKL kernel. We show, that these corrections lead to a
power-like decreasing behavior of amplitude, which differs from the BFKL case.


title:
An Analysis of $B \to \eta' K$ Decays Using a Global Fit in QCD
  Factorization

abstract:
  In the framework of QCD factorization, we study $B^{+(0)} \to \eta' K^{+(0)}$
decays. In order to more reliably determine the phenomenological parameters
$X_H$ and $X_A$ arising from end-point divergences in the hard spectator
scattering and weak annihilation contributions, we use the global analysis for
twelve $B \to PP$ and $VP$ decay modes, such as $B \to \pi \pi$, $\pi K$, $\rho
\pi$, $\rho K$, etc, but excluding the modes whose (dominant) internal
quark-level process is $b \to s \bar s s$. Based on the global analysis, we
critically investigate possible magnitudes of $X_{H,A}$ and find that both
large and small $X_{H,A}$ terms are allowed by the global fit. In the case of
the large $X_{H,A}$ effects, the standard model (SM) prediction of the
branching ratios (BRs) for $B^{+(0)} \to \eta' K^{+(0)}$ is large and well
consistent with the experimental results. In contrast, in the case of the small
$X_{H,A}$ effects, the SM prediction for these BRs is smaller than the
experimental data. Motivated by the recent Belle measurement of $\sin
(2\phi_1)$ through $B^0 \to \phi K_s$, if we take into account possible new
physics effects on the quark-level process $b \to s \bar s s$, we can
explicitly show that these large BRs can be understood even in the small
$X_{H,A}$ case. Specifically, we present two new physics scenarios: R-parity
violating SUSY and R-parity conserving SUSY.


title:
CP Asymmetries of $B \to \phi K$ and $B \to \eta^{(\prime)} K$ Decays
  Using a Global Fit in QCD Factorization

abstract:
  We analyze the CP asymmetries of $B\to \phi K$ and $B\to \eta^{(\prime)} K$
modes in the QCD improved factorization framework. For our calculation we use
the phenomenological parameters predetermined from the global fit for the
available $B\to PP$ and $VP$ modes (without the quark-level subprocess $b\to
s\bar s s$). We show that the large negative $\sin (2\phi_1)_{\phi K_s}$ and
the large branching ratio for $B^{\pm}\to \eta' K^{\pm}$ can be simultaneously
explained in the context of supersymmetry (SUSY). The R-parity conserving SUGRA
models are used and their parameter space is constrained with the observed dark
matter relic density along with other experimental constraints. The R-parity
violating SUSY models are also used to show that they can provide solutions. We
calculate the CP asymmetries for different $B^{\pm (0)} \to \phi K^{\pm (0)}$
and $B^{\pm (0)} \to \eta^{(')} K^{\pm (0)}$ modes and show that the SUSY model
predictions are consistent with the available experimental data.


title: Multi-particle correlations in qp-Bose gas model

abstract:
  The approach based on multimode system of q-deformed oscillators and the
related picture of ideal gas of q-bosons enables to effectively describe the
observed non-Bose type behaviour, in experiments on heavy-ion collisions, of
the intercept (or the "strength") $\lambda$ of the two-particle correlation
function of identical pions or kaons. In this paper we extend main results of
that approach in the two aspects: first, we derive in explicit form the
intercepts of n-particle correlation functions in the case of q-Bose gas model
and, second, provide their explicit two-parameter (or qp-) generalization.

categories: hep-ph cond-mat.stat-mech hep-th nucl-th quant-ph


title: The Theta+ (1540) as an overlap of a pion, a kaon and a nucleon

abstract:
  We study the very recently discovered $\Theta^+$ (1540) at SPring-8, at ITEP
and at CLAS-Thomas Jefferson Lab. We apply the same RGM techniques that already
explained with success the repulsive hard core of nucleon-nucleon, kaon-nucleon
exotic scattering, and the attractive hard core present in pion-nucleon and
pion-pion non-exotic scattering. We find that the K-N repulsion excludes the
Theta+ as a K-N s-wave pentaquark. We explore the Theta+ as heptaquark,
equivalent to a N+pi+K borromean boundstate, with positive parity and total
isospin I=0. We find that the kaon-nucleon repulsion is cancelled by the
attraction existing both in the pion-nucleon and pion-kaon channels. Although
we are not yet able to bind the total three body system, we find that the
Theta+ may still be a heptaquark state.


title: Dirac Neutrino Masses with Planck Scale Lepton Number Violation

abstract:
  It is shown how pure Dirac neutrino masses can naturally occur at low
energies even in the presence of Planck scale lepton number violation. The
geometrical picture in five dimensions assumes that the lepton number symmetry
is explicitly broken on the Planck brane while the right-handed neutrino is
localised on the TeV brane. This physical separation in the bulk causes the
global lepton number to be preserved at low energies. A small wavefunction
overlap between the left-handed and right-handed neutrinos then naturally leads
to a small Dirac Yukawa coupling. By the AdS/CFT correspondence there exists a
purely four-dimensional dual description in which the right-handed neutrino is
a composite CFT bound state. The global lepton number is violated at the Planck
scale in a fundamental sector whose mixing into the composite sector is highly
suppressed by CFT operators with large anomalous dimensions. A similar small
mixing is then also responsible for generating a naturally small Dirac Yukawa
coupling between the fundamental left-handed neutrino and the composite
right-handed neutrino.


title: Neutrinos: Windows to Planck Physics

abstract:
  After recalling some elegant contributions of the late Freydoon Mansouri, we
turn to neutrino physics and use a {\it modicum} of grand unification to relate
quark and lepton mixing matrices. We advocate an expansion for the MNS matrix,
{\it \`a la} Wolfenstein, and argue that in a wide class of models,
$\theta_{13}$ is a Cabibbo mixing effect. Also the large neutrino mixing angles
reflect the mass patterns of the right-handed neutrinos near the Planck scale,
and provide evidence for family structure at that scale.


title: Effective theory calculation of resonant high-energy scattering

abstract:
  Tests of the standard model and its hypothetical extensions require precise
theoretical predictions for processes involving massive, unstable particles. It
is well-known that ordinary weak-coupling perturbation theory breaks down due
to intermediate singular propagators. Various pragmatic approaches have been
developed to deal with this difficulty. In this paper we construct an effective
field theory for resonant processes utilizing the hierarchy of scales between
the mass of the unstable particle, M, and its width, Gamma. The effective
theory allows calculations to be systematically arranged into a series in g^2
and Gamma/M, and preserves gauge invariance in every step. We demonstrate the
applicability of this method by calculating explicitly the inclusive line shape
of a scalar resonance in an abelian gauge-Yukawa model at next-to-leading order
in Gamma/M and the weak couplings. We also discuss the extension to
next-to-next-to-leading order and compute an interesting subset of these
corrections.


title:
Is Super-$B$ Sufficiently Superb? -- On the Motivation for a Super-$B$
  Factory

abstract:
  Despite the great success of the $\Upsilon (4S)$ $B$ factories at KEK and
SLAC and the guaranteed addition of high sensitivity measurements on beauty
decays to be performed at the Tevatron and LHC, a strong case can be made for
an $e^+e^-$ Super-$B$ factory yielding data samples of order $10^{10}$ $B \bar
B$ pairs as a necessity rather than luxury. It has to be justified through its
ability to not only establish deviations from the Standard Model, but also
diagnose and interpret those in terms of specific features of the New Dynamics.
The role to be played by a Super-$B$ factory is thus analogous {\em and even in
parallel} to that of a linear collider. The latter's goal is to provide more
detailed information on previously discovered New Physics involved in the
electroweak phase transition. Likewise a Super-$B$ factory would provide
precision probes for analyzing whether such New Dynamics has an impact on heavy
flavour dynamics -- a need particularly manifest if the New Physics is housed
under the `big tent' of SUSY. The huge statistics of a Super-$B$ factory and
the comprehensive body of accurate measurements uniquely possible there would
be harnessed in several classes of studies, among them more precise extractions
of $V(ub)/V(cb)$ and $V(td)/V(ts)$, more detailed analyses of $B\to \gamma
X_{s,d}, l^+l^-X$ and novel data on $B\to \tau \nu, \tau \nu D, \nu \bar \nu X$
and maybe even on $\Upsilon (5S) \to B_s \bar B_s$ -- all in addition to a host
of CP asymmetries.


title: Statistics of String vacua

abstract:
  We give an introduction to the statistical approach to studying vacua of
string/M theory, and discuss recent results of Ashok and Douglas on counting
supersymmetric flux vacua in type IIb Calabi-Yau compactification.
  To appear in the proceedings of the 2003 String Phenomenology workshop in
Durham, UK.


title: Phase Transitions in High Energy Heavy-Ion Collisions

abstract:
  Modelling Quark-Gluon Plasma formation and decay in high energy heavy ion
reactions is presented in a framework of a multi-module setup. The collective
features, governing the equlibrated fluid dynamical stages of the model are
emphasized. Flow effects formed from the initial conditions are discussed.
Particular attention is given to the improvement of the final hadronization and
freeze-out part of the reaction which has strong effects on the observables.


title:
New sum rules for nucleon and trinucleon total photoproduction
  cross-sections

abstract:
  Two new sum rules are derived relating Dirac radii and anomalous magnetic
moments of the considered strongly interacting fermions with the convergent
integral over a difference of the total proton and neutron, as well as $He^3$
and $H^3$, photoproduction cross-sections.


title: Pseudoscalar meson transition form factors

abstract:
  Present-day experimental and phenomenological situation about pseudoscalar
($\pi^0$, $\eta$, $\eta'$) meson transition form factors is briefly reviewed.
Necessity of more sophisticated behaviours in time-like region of these form
factors is emphasized. Four-resonance unitary and analytic model of the
pseudoscalar meson transition form factors is constructed, which describes well
all existing experimental information.


title: Strange-Quark Vector Current Pseudoscalar-Meson Transition Form Factors

abstract:
  Similarly to the electromagnetic pseudoscalar-meson transition form factors
one can define also strange-quark vector current pseudoscalar-meson transition
form factors, contributing only to a behaviour of the isoscalar parts of the
previous ones. Their explicit form is found by constructing unitary and
analytic models of the strange pseudoscalar-meson transition form factors
dependent only on $\omega$ and $\phi$ coupling constant ratios as a free
parameters. Numerical values of these ratios are then determined from the
corresponding pseudoscalar-meson transition form factors by employing the
$\omega$-$\phi$ mixing and a special assumption on the coupling of the quark
components of vector-meson wave functions to flavour component of currents
under consideration.


title: Correction of the low energy theorem of \gamma\to2\pi anomaly

abstract:
  A correction of the low energy theorem of the \gamma\to3\pi anomaly has been
found. A_{3\pi}(0,0,0) and the cross section are calculated. Theory agrees with
data. There is no new adjustable parameter.


title: The Making of the Standard Model

abstract:
  This is the edited text of a talk given at CERN on Septembr 16, 2003, as part
of a celebration of the 30th anniversary of the discovery of neutral currents
and the 20th anniversary of the discovery of the W and Z particles.


title: Gauge Unification and Flavor Hierarchy from Extra Dimensions

abstract:
  Extra dimension provides an attractive way to break symmetry by boundary
conditions which can be useful to construct a natural grand unified theory
avoiding the doublet-triplet splitting problem and the proton decay problem. It
can provide also an elegant mechanism to generate hierarchical 4-dimensional
Yukawa couplings, involving the quasi-localization of matter fields in extra
dimension. We discuss the Kaluza-Klein threshold corrections to low energy
gauge couplings in generic 5-dimensional orbifold grand unified theories with
quasi-localized matter fields, and apply the results to some class of SU(5)
models on $S^1/Z_2\times Z_2$.


title: Baryogenesis from the Kobayashi-Maskawa Phase

abstract:
  The Standard Model fulfills the three Sakharov conditions for baryogenesis.
The smallness of quark masses suppresses, however, the CP violation from the
Kobayashi-Maskawa phase to a level that is many orders of magnitude below what
is required to explain the observed baryon asymmetry. We point out that if, as
a result of time variation in the Yukawa couplings, quark masses were large at
the time of the electroweak phase transition, then the Kobayashi-Maskawa
mechanism could be the source of the asymmetry. The Froggatt-Nielsen mechanism
provides a plausible framework where the Yukawa couplings could all be of order
one at that time, and settle to their present values before nucleosynthesis.
The problems related to a strong first order electroweak phase transition may
also be alleviated in this framework. Our scenario reveals a loophole in the
commonly held view that the Kobayashi-Maskawa mechanism cannot be the dominant
source of CP violation to play a role in baryogenesis.


title:
QCD and hybrid NBD on oscillating moments of multiplicity distributions
  in lepton- and hadron-initiated reactions

abstract:
  QCD predictions for moments of multiplicity distributions are compared with
experimental data on e+e- collisions and their two-NBD fits. Moments of the
multiplicity distribution in a two-NBD model for 1.8 TeV pp collisions are
considered. Three-NBD model predictions and fits for pp at LHC energies are
also discussed. Analytic expressions for moments of hybrid NBD are derived and
used to get insight into jet parameters and multicomponent structure of the
processes. Interpretation of observed correlations is proposed.


title: Isospin analysis of B -> Dbar(*) D(*) K decays

abstract:
  The peculiar isospin properties of the b -> c cbar s current lead to a rich
set of isospin relations for the B -> Dbar(*) D(*) K decays which are presented
here. Recent high quality experimental data on the complete set of these decays
(22 measurements) are analysed in this context, the isospin relations are
tested and the results for the isospin amplitudes are discussed. The comparison
between the measured and expected branching fractions yields a new measurement
of the ratio of branching fractions Br(Upsilon(4S) -> B+ B-)/Br(Upsilon(4S) ->
B0 B0bar)}=0.86 +- 0.13. We finally discuss the implications of our findings
for the measurement of sin(2 beta) and cos(2 beta) using these decays.


title:
Model-independent analysis of four-fermion contact interaction at e^+e^-
  collider

abstract:
  We study electron-electron contact-interaction searches in the process
e^+e^-\to e^+e^- at a future e^+e^- Linear Collider with both beams
longitudinally polarized. We evaluate the model-independent constraints on the
coupling constants, emphasizing the role of beam polarization, and make a
comparison with the case of e^+e^-\to\mu^+\mu^-.


title: Optical cavity tests of Lorentz invariance for the electron

abstract:
  A hypothetical violation of Lorentz invariance in the electrons' equation of
motion (expressed within the Lorentz-violating extension of the standard model)
leads to a change of the geometry of crystals and thus shifts the resonance
frequency of an electromagnetic cavity. This allows experimental tests of
Lorentz invariance of the electron sector of the standard model. The material
dependence of the effect allows to separate it from an additional shift caused
by Lorentz violation in electrodynamics, and to place independent limits on
both effects. From present experiments, upper limits on Lorentz violation in
the electrons' kinetic energy term are deduced.


title: Pointlike electrons and muons and the nature of neutrinos

abstract:
  We show that the form factor of an electron or a muon is unity for the
modulus of the momentum transfer away from the Hagedorn temperatures
$T^{e}_0\sim m_e$ and $T^{\mu}_0\sim m_\mu$ and lower than the hadronic
Hagedorn temperature $T^{\tiny{QCD}}_0\sim m_\pi$. The structure of the
electron or the muon is resolved for momemtum transfers comparable to
$T^{e,\mu}_0$. This is seen in scattering experiments performed in the 1950s,
1960s, and early 1970s to test the validity of QED. We interprete center-vortex
loops with no self-intersection, occurring in the confining phases of each
SU(2) gauge-theory factor, as {\sl Majorana} neutrinos. We offer a possible
explanation for a contribution to $\Lambda_{\tiny{cosmo}}$ not generated by the
so-far nonconfining, strongly interacting gauge theory SU(2)$_{\tiny{CMB}}$.


title: A Proposal About the Confinement of Quarks

abstract:
  From the Dirac sea concept and the Quark Model, we infer a phenomenological
accompanying excitation concept. This concept will give an explanation for the
confinement of quarks.


title:
$\rho-\omega-$Interference in $J/\psi-$Decays and $\rho\to
  \pi^+\pi^-\pi^0$ Decay

abstract:
  We study $\rho-\omega-$interference by analyzing $J/\psi\to
\pi^+\pi^-\pi^0\pi^0$. PDG-2002 data on $J/\psi$ decays into $PP$ and $PV$ ($P$
denotes pseudoscalar mesons; $V$, vector mesons) are used to fit a generic
model which describes the $J/\psi$ decays. From the fits, we obtain anomalously
large branching ratio $Br(\rho^0\to \pi^+\pi^-\pi^0)\sim 10^{-3}-10^{-2}$. A
theoretical analysis for it is also provided, and the prediction is in good
agreement with the anomalously large $Br(\rho^0\to \pi^+\pi^-\pi^0)$. By the
fit, we also get the $\eta-\eta'-$mixing angle $\theta=-19.68^o\pm 1.49^o$ and
the constituent quark mass ratio $m_u/m_s\sim 0.6$ which are all reasonable.


title:
Comparative analysis of the four-fermion contact interactions at e^+e^-
  and e^-e^- colliders


title:
Towards a New Global QCD Analysis: Solution to the Non-Linear Equation
  at Arbitrary Impact Parameter

abstract:
  A numerical solution is presented for the non-linear evolution equation that
governs the dynamics of high parton density QCD. It is shown that thesolution
falls off as $e^{-b/R}$ at large values of the impact parameter $b$. The
power-like tail of the amplitude appears in impact parameter distributions only
after the inclusion of dipoles of size larger than the target, a configuration
for which the non-linear equation is not valid. The value, energy and impact
parameterof the saturation scale $Q_s(y=\ln(1/x),b)$) are calculated both for
fixed and running QCD coupling cases. It is shown that the solution exhibits
geometrical scaling behaviour. The radius of interaction increases as the
rapidity in accordance with the Froissart theorem. The solution we obtain
differs from previous attempts, where an anzatz for $b$ behaviour was made. The
solutions for running and fixed $\as$ differ. For running $\as$ we obtain a
larger radius of interaction (approximately twice as large), a steeper rapidity
dependence, and a larger value of the saturation scale.


title:
Heavy quark production by a quasi-classical color field in
  proton-nucleus collisions

abstract:
  We calculate the inclusive heavy quark production cross section for
proton-nucleus collisions at high energies. We perform calculation in a
quasi-classical approximation (McLerran-Venugopalan model) neglecting all low-x
evolution effects. The derived expression for the differential cross section
can be applied for studying the heavy quark production in the central rapidity
region at RHIC.


title: Spin and parity of a possible baryon antidecuplet

abstract:
  The recently postulated existence of a baryon antidecuplet [1] can be
reproduced in strong coupling theory in which a bare baryon spin 1/2 octet
interacts with an octet of pseudoscalar mesons. When a suitable mixture of F-
and D-type Yukawa couplings is chosen the dressed baryons group themselves into
an infinite number of SU(3) multiplets of which the ground state turns out to
be a spin 1/2 baryon octet and the first excited state is a spin 3/2 baryon
decuplet. Then follows a spin 1/2 baryon antidecuplet. All states of the
spectrum have positive parity. If the hypothetical baryon antidecuplet can be
identified with the antidecuplet in the strong coupling spectrum then a
positive parity and a spin 1/2 is predicted for this multiplet.


title:
Threshold corrections to m_b and the b\bar{b} -> H^0_i production in
  CP-violating SUSY scenarios

abstract:
  The inclusion of supersymmetric threshold corrections to the $b$-quark mass
has dramatic consequences in scenarios with large CP-mixing effects in the
Higgs sector. In particular, when the phase of the combination
$M_{\tilde{g}}\mu$ is $\sim 180^{\rm o} \pm 30^{\rm o}$, the lightest-sbottom
squark becomes tachyonic and, possibly, the $b$-quark Yukawa coupling
nonperturbative for values of $\tan \beta$ ranging from intermediate up to
large or very large, depending on the size of $arg(A_t\mu)$, $arg(A_b\mu)$, and
the details of the spectrum. For these scenarios, when allowed, as well as
scenarios with different values of $arg(M_{\tilde{g}}\mu)$, the cross sections
for the production of the three neutral-Higgs bosons through $b$-quark have
rather interesting dependences on $arg(A_t\mu)$ and $arg(A_b\mu)$, and the
deviations induced by the $m_b$ corrections are rather large. In general, such
production channel cannot be neglected with respect to the production through
gluon fusion. For large CP-mixing effects, the lightest neutral-Higgs boson can
be mainly CP odd and the $b$-quark fusion becomes its main production
mechanism. Searches at the Tevatron and the LHC can easily detect such a Higgs
boson, or constrain the CP-violating scenarios that allow it.


title: Lepton Family Symmetry and Neutrino Mass Matrix

abstract:
  The standard model of leptons is extended to accommodate a discrete Z_3 X Z_2
family symmetry. After rotating the charged-lepton mass matrix to its diagonal
form, the neutrino mass matrix reveals itself as very suitable for explaining
atmospheric and solar neutrino oscillation data. A generic requirement of this
approach is the appearance of three Higgs doublets at the electroweak scale,
with observable flavor violating decays.


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

abstract:
  A precise determination of the W boson mass at the Fermilab Tevatron requires
a theoretical calculation in which the effects of the initial-state multiple
soft-gluon emission and the final-state photonic correction are simultaneously
included . Here, we present such a calculation and discuss its prediction on
the transverse mass distribution of the W boson and the transverse momentum
distribution of its decay charged lepton, which are the most relevant
observables for measuring the W boson mass at hadron colliders.


title: QCD and Heavy Hadron Decays

abstract:
  We review recent developments in QCD pertaining to its application to weak
decays of heavy hadrons. We concentrate on exclusive rare and nonleptonic
B-meson decays, discussing both the theoretical framework and phenomenological
issues of current interest.


title: Soft Modes at the Critical End Point in the Chiral Effective Models

abstract:
  At the critical end point in QCD phase diagram, the scalar, vector and
entropy susceptibilities are known to diverge. The dynamic origin of this
divergence is identified within the chiral effective models as softening of a
hydrodynamic mode of the particle-hole--type motion, which is a consequence of
the conservation law of the baryon number and the energy.


title: Low scale gravity as the source of neutrino masses?

abstract:
  We address the question whether low-scale gravity alone can generate the
neutrino mass matrix needed to accommodate the observed phenomenology. In
low-scale gravity the neutrino mass matrix in the flavor basis is characterized
by one parameter (the gravity scale M_X) and by an exact or approximate flavor
blindness (namely, all elements of the mass matrix are of comparable size).
Neutrino masses and mixings are consistent with the observational data for
certain values of the matrix elements, but only when the spectrum of mass is
inverted or degenerate. For the latter type of spectra the parameter M_{ee}
probed in double beta experiments and the mass parameter probed by cosmology
are close to existing upper limits.


title:
An Analytical Expression for the Non-Singlet Structure Functions at
  Small $x$ in the Double Logarithmic Approximation

abstract:
  A simple analytic expression for the non-singlet structure function $f_{NS}$
is given. The expression is derived from the result of Ref. [1] obtained by low
$x$ resummation of the quark ladder diagrams in the double logarithmic
approximation of perturbative QCD.


title: Searching for new physics in Upsilon decays

abstract:
  We study some possible experimental consequences of new physics on the
spectrum and decays of bottomonium states below $B\bar{B}$ threshold. In
addition to lepton universality breaking in Upsilon decays, large widths of
pseudoscalar $\eta_b$ resonances and mixing with a non-standard CP-odd light
Higgs boson might smooth and shift the signal peak from hindered radiative M1
transitions between $\Upsilon$ and $\eta_b$ states in the photon energy
spectrum, as searched by CLEO. We also stress the relevance of forthcoming
results from CLEO on leptonic branching fractions of $\Upsilon$ resonances to
definitely check our hypothesis.


title: The role of spurions in Higgs-less electroweak effective theories

abstract:
  Inspired by recent developments of moose models we reconsider low-energy
effective theories of Goldstone bosons, gauge fields and chiral fermions
applied to low-energy QCD and to Higgs-less electroweak symmetry breaking.
  Couplings and the corresponding reduction of symmetry are introduced via
constraints enforced by a set of non-propagating covariantly constant spurion
fields. Relics of the latter are used as small expansion parameters conjointly
with the usual low-energy expansion. Certain couplings can only appear at
higher orders of the spurion expansion and consequently, they become naturally
suppressed independently of the idea of dimensional deconstruction.
  At leading order this leads to a set of generalized Weinberg sum rules and to
the suppression of non-standard couplings to fermions in Higgs-less EWSB models
with the minimal particle content. Within the latter, higher spurion terms
allow for a fermion mass matrix with the standard CKM structure and CP
violation. In addition, Majorana masses for neutrinos are possible. Examples of
non-minimal models are briefly mentioned.


title: Extra Dimensions in Particle Physics

abstract:
  Current problems in particle physics are reviewed from the viewpoint of
theories possessing extra spatial dimensions.


title: A Perspective on Pentaquarks

abstract:
  Recent discoveries of manifestly exotic, narrow baryon resonances present a
fundamental challenge for our theoretical understanding of low-energy QCD. This
is a brief survey of their interpretation, emphasizing the possibility that
diquark correlations are centrally involved. Many predictions and suggestions
for future directions follow from that idea.


title: From Concept to Reality to Vision

abstract:
  I take a brief look at three frontiers of high-energy physics, illustrating
how important parts of our current thinking evolved from earlier explorations
at preceding frontiers.


title:
Improvement of Renormalization-Scale Uncertainties Within Empirical
  Determinations of the b-Quark Mass

abstract:
  Accurate determinations of the MS-bar b-quark mass $m_b(m_b)$ from
$\sigma(e^+e^-\to{\rm hadrons})$ experimental data currently contain three
comparable sources of uncertainty; the experimental uncertainty from moments of
this cross-section, the uncertainty associated with $\alpha_s(M_z)$, and the
theoretical uncertainty associated with the renormalization scale. Through
resummation of all logarithmic terms explicitly determined in the perturbative
series by the renormalization-group (RG) equation, it is shown that the
renormalization-scale dependence is virtually eliminated as a source of
theoretical uncertainty in $m_b(m_b)$. This resummation also reduces the
estimated effect of higher-loop perturbative contributions, further reducing
the theoretical uncertainties in $m_b(m_b)$. Furthermore, such resummation
techniques improve the agreement between the values of the MS-bar b-quark mass
extracted from the various moments of $R(s)=\sigma(e^+e^-\to{\rm
hadrons})/\sigma_{pt}$ [$\sigma_{pt}=4\pi\alpha^2/(3s)$], obviating the need to
choose an optimummoment for determining $m_b(m_b)$. Resummation techniques are
also shown to reduce renormalization-scale dependence in the relation between
b-quark MS-bar and pole mass and in the relation between the pole and $1S$
mass.


title: Large Nc Behavior of Light Scalar Meson Nonet Revisited

abstract:
  We study whether light scalar meson nonet can survive in large values of Nc
through observing how scattering amplitudes behave as Nc increases from 3
within a unitarized chiral approach. We obtain the result that vector mesons
such as rho and K* survive as narrow width resonances, but all of the scalar
meson nonet below 1 GeV fade out as Nc exceeds a rather small number about 6.


title: Rare decays $\bar{B}\to X_{s(d)}\gamma$ at the NLO

abstract:
  We present an independent calculation of ${\cal{O}}(\alpha_s)$ matrix
elements of the QCD penguin operators for the decays $\bar{B}\to
X_{s(d)}\gamma$. The Mellin-Barnes representation technique is applied for the
systematic numerical evaluation of involved two-loop diagrams. The numerical
effect of the calculated contributions is confirmed to be of order of 1%. We
also present an updated numerical analysis for $\bar{B}\to X_{s(d)}\gamma$
decay rates.


title: $\pi\pi$ Scattering in Three Flavour ChPT

abstract:
  We present the scattering lengths for the $\pi\pi$ processes in the three
flavour Chiral Perturbation Theory (ChPT) framework at next-to-next-to-leading
order. We then combine this calculation with the determination of the
parameters from $K_{e4}$ and the masses and decay constants and compare with
the results of a dispersive analysis of $\pi\pi$ scattering. The comparison
indicates a small but nonzero value for the $1/N_c$ suppressed NLO low energy
constants $L_4^r$ and $L_6^r$.


title:
The high-energy hadron spin-flip amplitude at small momentum transfer
  and new AN data from RHIC

abstract:
  In the case of elastic high-energy hadron-hadron scattering, the impact of
the large-distance contributions on the behaviour of the slopes of the
spin-non-flip and of the spin-flip amplitudes is analysed. It is shown that the
long tail of the hadronic potential in impact parameter space leads to a value
of the slope of the reduced spin-flip amplitude larger than that of the
spin-non-flip amplitude. This effect is taken into account in the calculation
of the analysing power in proton-nucleus reactions at high energies. It is
shown that the preliminary measurement of AN obtained by the E950 Collaboration
indeed favour a spin-flip-amplitude with a large slope. Predictions for AN at
pL = 250 GeV/c are given.


title:
Three-loop matching of the dipole operators for b -> s gamma and b -> s
  g

abstract:
  We evaluate the three-loop matching conditions for the dimension-five
operators that are relevant for the b -> s gamma decay. Our calculation
completes the first out of three steps (matching, mixing and matrix elements)
that are necessary for finding the next-to-next-to-leading QCD corrections to
this process. All such corrections must be calculated in view of the ongoing
accurate measurements of the B -> Xs gamma branching ratio.


title: Status of neutrino oscillations I: the three-neutrino scenario

abstract:
  We present a global analysis of neutrino oscillation data within the
three-neutrino oscillation scheme, including in our fit all the current solar
neutrino data, the reactor neutrino data from KamLAND and CHOOZ, the
atmospheric neutrino data from Super-Kamiokande and MACRO, and the first data
from the K2K long-baseline accelerator experiment. We determine the current
best fit values and allowed ranges for the three-flavor oscillation parameters,
discussing the relevance of each individual data set as well as the
complementarity of different data sets. Furthermore, we analyze in detail the
status of the small parameters theta_13 and Delta_m21^2 / Delta_m31^2, which
fix the possible strength of CP violating effects in neutrino oscillations.


title:
Proceedings to the 'Euroconference on Symmetries Beyond the Standard
  Model', 12. - 17. July 2003, Portoroz, Slovenia (Part 1 of 2)

abstract:
  Contents of Part 1: 1. Status of the Standard Model(P.H. Frampton), 2.
Cosmological Constraints from MBA and Polarization (A. Melchiorri), 3. AdS/CFT
Correspondence and Unification at About 4 TeV (P.H. Frampton), 4. New Solutions
in String Field Theory (L. Bonora), 5. The Approach Unifying Spins and Charges
(A. Borstnik Bracic and N. Mankoc Borstnik) 6. An Example ... (N. Mankoc
Borstnik and H.B. Nielsen) 7. Hierarchy Problem and a New Bound State (C.D.
Froggatt and H.B. Nielsen) 8. What Comes Next? (Q. Shafi) 9. Loops Versus
Strings (E. Alvarez) 10. Fuzzy Two-dimensional Spaces (F. Lizzi)
  (Contents of Part 2: 11. Supersymmetric Grandunification and Fermion Masses
(B. Bajc) 12. General Principles of Brane Kinematics and Dynamics (M. Pavsic)
13. Cosmological Neutrinos (G. Mangano) 14. The Problem of Mass (C.D. Froggatt)
15. How to Approach Quantum Gravity ... (D. Grumiller and W. Kummer) 16. Hidden
Spacetime Symmetries and Generalized Holonomy in M-theory (M.J. Duff and J.T.
Liu) 17. On the Resolution of Space-Time Singularities II (M. Maceda and J.
Madore) 18. The Multiple Point Principle (D.L. Bennett and H.B. Nielsen) 19.
Dynamics of Glue-Balls in N = 1 SYM Theory (L. Bergamin) 20. Quantization of
Systems with Continuous Symmetries ... (M.V. Chichikina) 21. Singular
Compactifications and Cosmology (L. Jaerv, T. Mohaupt and F. Saueressig) 22.
Fundamental Physics and Lorentz Violation (R. Lehnert) 23. Functional Approach
to Squeezed States ... (L. Musongela) 24. Constraining the Curvaton Scenario
(M. Postma) 25. D-Branes and Unitarity of Noncommutative Field Theories (A.
Torrielli) 26. Spinorial Cohomology and Supersymmetry (D. Tsimpis))


title: Quarks and Leptons in a Hexagonal Chain

abstract:
  The seemingly disparate notions of chiral color and quark-lepton
nonuniversality are combined, and shown to be essential to each other as part
of an underlying (and unifying) larger symmetry, i.e. supersymmetric SU(3)^6.
Both phenomena are accessible experimentally at the TeV energy scale.


title: The effect of memory on relaxation in a scalar field theory

abstract:
  We derive a kinetic equation with a non-Markovian collision term which
includes a memory effect, from Kadanoff-Baym equations in $\phi^4$ theory
within the three-loop level for the two-particle irreducible (2PI) effective
action. The memory effect is incorporated into the kinetic equation by a
generalized Kadanoff-Baym ansatz.Based on the kinetic equations with and
without the memory effect, we investigate an influence of this effect on decay
of a single particle excitation with zero momentum in 3+1 dimensions and the
spatially homogeneous case. Numerical results show that, while the time
evolution of the zero mode is completely unaffected by the memory effect due to
a separation of scales in the weak coupling regime, this effect leads first to
faster relaxation than the case without it and then to slower relaxation as the
coupling constant increases.


title:
Structures of the $f_0(980)$, $a_0(980)$ mesons and the strong coupling
  constants $g_{f_0 K^+ K^-}$, $g_{a_0 K^+ K^-}$ with the light-cone QCD sum
  rules

abstract:
  In this article, with the assumption of explicit isospin violation arising
from the $f_0(980)-a_0(980)$ mixing, we take the point of view that the scalar
mesons $f_0(980)$ and $a_0(980)$ have both strange and non-strange
quark-antiquark components and evaluate the strong coupling constants $g_{f_0
K^+ K^-}$ and $g_{a_0 K^+ K^-}$ within the framework of the light-cone QCD sum
rules approach. The large strong scalar-$KK$ couplings through both the
$n\bar{n}$ and $s\bar{s}$ components $g^{\bar{n}n}_{f_0 K^+ K^-}$,
$g^{\bar{s}s}_{f_0 K^+ K^-}$,
  $g^{\bar{n}n}_{a_0 K^+ K^-}$ and $g^{\bar{s}s}_{a_0 K^+ K^-}$will support the
hadronic dressing mechanism, furthermore, in spite of the constituent structure
differences between the $f_0(980)$ and $a_0(980)$ mesons, the strange
components have larger strong coupling constants with the $K^+K^-$ state than
the corresponding non-strange ones, $g_{f_0 K^+ K^-}^{\bar{s}s}\approx
\sqrt{2}g_{f_0 K^+ K^-}^{\bar{n}n}$ and $g_{a_0 K^+ K^-}^{\bar{s}s}\approx
\sqrt{2} g_{a_0 K^+ K^-}^{\bar{n}n}$. From the existing controversial values,
we can not reach a general consensus on the strong coupling constants $g_{f_0
K^+ K^-}$, $g_{a_0 K^+ K^-}$ and the mixing angles.


title:
Neural network parametrization of spectral functions from hadronic tau
  decays and determination of QCD vacuum condensates

abstract:
  The spectral function $\rho_{V-A}(s)$ is determined from ALEPH and OPAL data
on hadronic tau decays using a neural network parametrization trained to retain
the full experimental information on errors, their correlations and chiral sum
rules: the DMO sum rule, the first and second Weinberg sum rules and the
electromagnetic mass splitting of the pion sum rule. Nonperturbative QCD vacuum
condensates can then be determined from finite energy sum rules. Our method
minimizes all sources of theoretical uncertainty and bias producing an estimate
of the condensates which is independent of the specific finite energy sum rule
used. The results for the central values of the condensates $O_6$ and $O_8$ are
both negative.


title: Decay widths and energy shifts of pi pi and pi K atoms

abstract:
  We calculate the S-wave decay widths and energy shifts for pi pi and pi K
atoms in the framework of QCD+QED. The evaluation - valid at next-to-leading
order in isospin symmetry breaking - is performed within a non-relativistic
effective field theory. The results are of interest for future hadronic atom
experiments.


title:
Production of Theta(1540) and Xi Pentaquark States in Proton-Proton
  Interactions

abstract:
  The production of strange pentaquark states (e.g. Theta baryons and Xi^--
states) in hadronic interactions within a Gribov-Regge approach is explored. In
this approach the Theta^+(1540) and the Xi Pentaquark are produced by
disintegration of remnants formed by the exchange of pomerons between the two
protons. We predict the rapidity and transverse momentum distributions as well
as the 4 pi multiplicity of the Theta^+, Xi^--, Xi^-, Xi^0 and Xi^+ for sqrt{s}
= 17 GeV (SPS) and 200 GeV (RHIC). For both energies more than 10^{-3} Theta^+
and more than 10^{-5} Xi per pp event should be observed by the present
experiments.


title:
Model-independent methods to measure the $P$-parity of the
  $\Theta^+$-pentaquark in photoproduction experiments

abstract:
  We discuss model independent methods to measure the $P$-parity of the
$\Theta^+$-pentaquark, in the simplest processes of photoproduction,
$\gamma+N\to \bar{K}+\Theta^+$, using definite relations between T-even
polarization observables, which depend on the $P$-parity of the $\Theta^+$
baryon (with respect to the $NK$ system). One method, which holds for any
photon energy and any $K$ meson production angle, is based on the relation
between the $\Sigma_B$ asymmetry (induced by a linearly polarized photon beam,
with unpolarized target) and the $D_{nn}$ component of the depolarization
tensor (for unpolarized photon beam). Another method, which applies in
collinear kinematics (or in threshold conditions), is related to the sign of
the $D_{nn}$ component, with linearly polarized photon beam.


title:
Remarks on: `Theory of Neutrino Oscillations' (hep-ph/0311241) by
  C.Giunti, the comments by L.B.Okun et al in hep-ph/0312151, and Giunti's
  reply in hep-ph/0312180

abstract:
  As pointed out previously, some of the hypotheses used in the standard
discussion of the quantum mechanics neutrino oscillations, recently summarised
in the paper `Theory of Neutrino Oscillations' by C.Giunti, lack any physical
foundation and lead to neglect of both a factor of two correction in the
contribution of neutrino propagation to the oscillation phase and an important
contribution to the latter from the propagator of the source particle.


title: Dynamic universality class of the QCD critical point

abstract:
  We show that the dynamic universality class of the QCD critical point is that
of model H and discuss the dynamic critical exponents. We show that the baryon
diffusion rate vanishes at the critical point. The dynamic critical index $z$
is close to 3.


title:
Transverse quark motion inside charmonia in diffractive photo- and
  electroproductions

abstract:
  We reexamine the Fermi motion effects on the diffractive photo- and
electroproductions of heavy vector-mesons, J/psi and psi', off a nucleon in the
leading ln(Q^2/Lambda_QCD^2) approximation (LLA) of QCD. We take into account
all the Fermi motion corrections arising from the relative motion of quarks
inside the charmonium, which is treated as a nonrelativistic bound state of c
and \bar{c}. Our key ingredients are the correct spin structure for the ^3S_1
c\bar{c} bound state, the off-shellness in the c\bar{c} \to J/psi (psi')
hadronization vertex, and the modification of the gluon's longitudinal momentum
fraction probed by the process, due to the relative motion between c and
\bar{c}. We demonstrate that these three contributions produce the new Fermi
motion effects in the LLA diffractive amplitude in QCD. It is found that our
new effects moderate the strong suppression of the diffractive J/psi (psi')
production cross sections, which was reported in the previous works on the
Fermi motion effects. We emphasize the role of the transverse quark motion for
the heavy meson production, and also discuss the strong helicity dependence of
the Fermi motion effects and its implication in the longitudinal to transverse
production ratio, sigma_L/sigma_T.


title: Leptogenesis from a sneutrino condensate revisited

abstract:
  We re--examine leptogenesis from a right--handed sneutrino condensate, paying
special attention to the $B-$term associated with the see--saw Majorana mass.
This term generates a lepton asymmetry in the condensate whose time average
vanishes. However, a net asymmetry will result if the sneutrino lifetime is not
much longer than the period of oscillations. Supersymmetry breaking by thermal
effects then yields a lepton asymmetry in the standard model sector after the
condensate decays. We explore different possibilities by taking account of both
the low--energy and Hubble $B-$terms. It will be shown that the desired baryon
asymmetry of the Universe can be obtained for a wide range of Majorana mass.


title:
Proceedings to the 'Euroconference on Symmetries Beyond the Standard
  Model',12. - 17. July 2003, Portoroz, Slovenia (Part 2 of 2)

abstract:
  Contents of Part 2: 11. Supersymmetric Grandunification and Fermion Masses
(B. Bajc) 12. General Principles of Brane Kinematics and Dynamics (M. Pavsic)
13. Cosmological Neutrinos (G. Mangano) 14. The Problem of Mass (C.D. Froggatt)
15. How to Approach Quantum Gravity ... (D. Grumiller and W. Kummer) 16. Hidden
Spacetime Symmetries and Generalized Holonomy in M-theory (M.J. Duff and J.T.
Liu) 17. On the Resolution of Space-Time Singularities II (M. Maceda and J.
Madore) 18. The Multiple Point Principle (D.L. Bennett and H.B. Nielsen) 19.
Dynamics of Glue-Balls in N = 1 SYM Theory (L. Bergamin) 20. Quantization of
Systems with Continuous Symmetries ... (M.V. Chichikina) 21. Singular
Compactifications and Cosmology (L. Jaerv, T. Mohaupt and F. Saueressig) 22.
Fundamental Physics and Lorentz Violation (R. Lehnert) 23. Functional Approach
to Squeezed States ...(L. Musongela) 24. Constraining the Curvaton Scenario (M.
Postma) 25. D-Branes and Unitarity of Noncommutative Field Theories (A.
Torrielli) 26. Spinorial Cohomology and Supersymmetry (D. Tsimpis)
  (Contents of Part 1: 1. Status of the Standard Model(P.H. Frampton), 2.
Cosmological Constraints from MBA and Polarization (A. Melchiorri), 3. AdS/CFT
Correspondence and Unification at About 4 TeV (P.H. Frampton), 4. New Solutions
in String Field Theory (L. Bonora), 5. The Approach Unifying Spins and Charges
(A. Borstnik Bracic and N. Mankoc Borstnik) 6. An Example ... (N. Mankoc
Borstnik and H.B. Nielsen) 7. Hierarchy Problem and a New Bound State(C.D.
Froggatt and H.B. Nielsen) 8. What Comes Next? (Q. Shafi)9. Loops Versus
Strings (E. Alvarez) 10. Fuzzy Two-dimensional Spaces(F. Lizzi))


title:
Threshold corrections in bottom and charm quark hadroproduction at
  next-to-next-to-leading order

abstract:
  We calculate threshold soft-gluon corrections to total cross sections and
transverse momentum distributions for bottom and charm quark production in
fixed-target experiments, considering both pp and pi- p interactions. We
investigate the quality of the near threshold soft-gluon approximation at
next-to-leading order (NLO) and calculate next-to-next-to-leading order (NNLO)
corrections through next-to-next-to-next-to-leading-logarithmic (NNNLL)
accuracy, including some virtual terms. We find that the NNLO threshold
corrections reduce the factorization and renormalization scale dependence of
the cross sections.


title: High Density Effective Theory of QCD

abstract:
  We discuss the salient features of the high density effective theory (HDET)
of QCD, elaborating more on the matching for vector-vector correlators and
axial-vector-vector correlators, which are related to screening mass and axial
anomaly, respectively. We then apply HDET to discuss various
color-superconducting phases of dense QCD. We also review a recent proposal to
solve the sign problem in dense fermionic matter, using the positivity property
of HDET. Positivity of HDET allows us to establish rigorous inequalities in QCD
at asymptotic density and to show vector symmetry except the fermion number is
not spontaneously broken at asymptotic density.


title:
Factorization and the Soft-Collinear Effective Theory: Color-Suppressed
  Decays

abstract:
  We discuss the soft-collinear effective theory (SCET) and kinematic
expansions in B-decays, focusing on recent results for color suppressed B ->
D^(*) X decays. In particular we discuss model independent predictions for B^0
-> D^0 pi^0 and B^0 -> D^*0 pi^0, and update the comparison using new
experimental data. We show why HQET alone is insufficient to give these
results. SCET predictions are also reviewed for other B and Lambda_b decay
channels that are not yet tested by data.


title: Seesaw Enhancement of Bi-large Mixing in Two-Zero Textures

abstract:
  The seesaw enhancement of the bi-large mixings are discussed for the two-zero
textures of the neutrino mass matrix. There are no large mixings in both Dirac
neutrino mass matrix $m_D$ and right-handed Majorana neutrino mass matrix
$M_R$, however, the bi-large mixing is realized via the seesaw mechanism. We
present twelve sets of $m_D$ and $M_R$ for the seesaw enhancement and discuss
the related phenomena, the $\mu\to e+\gamma$ process and the leptogenesis. The
decay rate of $\mu\to e+\gamma$ is enough suppressed due to zeros in the Dirac
neutrino mass matrix. Six $m_D$ lead to the lepton asymmetry, which can explain
the baryon number in the universe. Other six $m_D$ are the real matrices, which
give no CP asymmetry. Modified Dirac neutrino mass matrices are also discussed.


title: Multiple Interactions and Beam Remnants

abstract:
  Open issues on the structure of multiple interactions are outlined. An
improved model is summarized, with a new approach to correlated parton
densities in flavour, colour, longitudinal and transverse momenta, for both
hard-scattering partons and beam-remnant ones.


title: New Showers with transverse-momentum-ordering

abstract:
  Two new showering routines are introduced, one for timelike final-state
showers and one for spacelike initial-state ones. They are both based on
emissions ordered in approximate transverse momenta that can easily be
translated to virtualities. Matrix-element corrections can then be imposed as
in the existing Pythia routines.


title: Nuclear shadowing in neutrino-nucleus deeply inelastic scattering

abstract:
  In the framework of the collinear factorized pQCD approach we calculate the
small-$x_B$ process-dependent nuclear modification to the structure functions
measured in neutrino-nucleus deeply inelastic scattering. We include both heavy
quark mass corrections $(M^2/Q^2)$ and resummed nuclear-enhanced dynamical
power corrections in the quantity $(\xi^2/Q^2)(A^{1/3}-1)$ with $\xi^2$
evaluated to leading order in $\alpha_s$. Our formalism predicts a measurable
difference in the shadowing pattern of the structure functions $F_2^A(x_B,Q^2)$
and $F_3^A(x_B,Q^2)$ and a significant low- and moderate-$Q^2$ modification of
the QCD sum rules. We also comment on the relevance of our results to the NuTeV
extraction of $\sin^2\theta_W$.


title: Moments of semileptonic B decay distributions in the 1/m_b expansion

abstract:
  We report the OPE-based predictions for a number of lepton energy and
hadronic mass moments in the inclusive semileptonic B -> X_c \ell\nu decays
with a lower cut on the charged lepton energy. We rely on the direct OPE
approach where no expansion in the charm mass is employed and the theoretical
input is a limited set of underlying OPE parameters including m_b and m_c. A
Wilsonian treatment with a `hard' cutoff is applied using running low-scale
masses m_Q(\mu) and kinetic expectation value \mu_\pi^2(\mu). This leaves for
perturbative corrections only genuinely short-distance effects and makes them
numerically small. Predictions are also given for the modified hadronic moments
of the kinematic variable \cal N_X^2 which is a combination of M_X^2 and E_X.
Measurement of such moments would allow a more reliable extraction of
higher-order nonperturbative heavy quark parameters from experiment.


title: Spontaneous CP violation and Non-Abelian Family Symmetry in SUSY

abstract:
  We analyse the properties of generic models based on an SU(3) family symmetry
providing a full description of quark charged lepton and neutrino masses and
mixing angles. We show that a precise fit of the resulting fermion textures is
consistent with CP being spontaneously broken in the flavour sector. The CP
violating phases are determined by the scalar potential and we discuss how
symmetries readily lead to a maximal phase controlling CP violation in the
quark sector. In a specific model the CP violation to be expected in the
neutrino sector is related to that in the quark sector and we determine this
relation for two viable models. In addition to giving rise to the observed
structure of quark and lepton masses this class of model solves both the CP and
flavour problems normally associated with supersymmetric models. The flavour
structure of the soft supersymmetry breaking terms is controlled by the family
symmetry and we analyse some of the related phenomenological implications.


title: Signals from R-parity violating top quark decays at LHC

abstract:
  We evaluate the potential of the CERN LHC collider to observe rare decays of
the top quark in channels involving R-parity violating (RPV) interactions. We
stress the importance of calculating top quark production and decay
simultaneously as a true 2->4 process.
  The process of tt-bar pair production followed by RPV decay of one of the top
quarks is analyzed with fast detector simulation. We show that intermediate
supersymmetric particles can be observed as resonances even if they are heavier
than the top quark due to the significant off-shell top-quark mass effects. The
approach where the top quark is produced on-mass-shell and then decays into 2-
or 3-body final state would in general lead to incorrect kinematical
distributions and rates. The rates of the 2 -> 4 process with top quark
production and RPV 3-body decay depend on the total width of the heavy
intermediate sfermion which could,therefore, be measured indirectly.
  We find that the LHC collider offers a unique potential to study rare top
quark decays in the framework of supersymmetry with broken R-parity for
branching fractions of RPV top decays as low as 10^{-6}


title: Production of Excited Neutrino at LHC

abstract:
  We study the potential of the CERN LHC in the search for the single
production of excited neutrino through gauge interactions. Subsequent decays of
excited neutrino via gauge interactions are examined. The mass range accessible
with the ATLAS detector is obtained.


title:
Cronin effect and energy conservation constraints in high energy
  proton-nucleus collisions

abstract:
  We estimate the Cronin effect in pA collisions at the CERN LHC and at RHIC,
using a Glauber-Eikonal model of initial state multiparton interactions. For a
correct determination of the initial parton flux, we upgrade the model cross
section, taking carefully into account all kinematical constraints of each
multi-parton interaction process. As compared with previous results, derived
with approximate kinematics, we obtain a softer spectrum of produced partons,
while improving the agreement of the model with the recent measurements of
neutral pions production in d+Au collisions at sqrt(s)=200 AGeV.