title:
Reply to a Comment of article ``Evidence for Neutrinoless Double Beta
  Decay''

abstract:
  After our publication of the observed first indication for neutrinoless
double beta decay in [KK-Evid01], a number of papers have been published
[KK-Sar_Evid01,KK2-Sar_Evid01,KK3-Sar_Evid01,Ma02-Ev,Barg02-Ev,Ueh02-Ev,Mi
n-Evid02,Chat-Evid02,Xing-Evid02,Ham-Evid02,Ahl-Kirch-Evid02,Ma-Evid2-02,Hab-Su
z02,Mohap02-Evid,Kays02-Evid,Fodor02-Evid,Pakv02-Evid,Rodej02-Evid,Kowal02,Niel
s02,He02-Evid,Josh02-Evid,Bran02-Evid,Cheng02-Evid,Smirn02-Evid,Wiss-Evid02]
discussing its implications. In addition a 'Comment' has been put to the
Internet February 7, 2002, [Comm-Evid02] ({\it version 1}) critisizing our
publication [KK-Evid01]. (Meanwhile six of the nine claims in the 'Comment'
have been withdrawn [Comm-Evid02] ({\it version 3}).) It is the purpose of this
note to show that none of their claims is justified (the same is true, from the
same arguments, for the criticism raised recently in [Harn-Id02]). We shall
show this by answering this 'Comment' point by point.


title: Review of Quantum Electromagnetodynamics

abstract:
  Several years ago, I suggested a quantum field theory which has many
attractive features. (1) It can explain the quantization of electric charge.
(2) It describes symmetrized Maxwell equations. (3) It is manifestly covariant.
(4) It describes local four-potentials. (5) It avoids the unphysical Dirac
string. Here I will review the ideas which led to my model of magnetic
monopoles including my prediction of the second kind of electromagnetic
radiation. I will present also the mathematical formalism. Moreover I will
suggest an experiment to verify the second kind of electromagnetic radiation
and point out a possible observation of this radiation by August Kundt in 1885.
Finally, I will list the many and far-reaching consequences, if this radiation
will be confirmed by future experiments.


title: Neutrinos Associated With Cosmic Rays of Top-Down Origin

abstract:
  Top-down models of cosmic rays produce more neutrinos than photons and more
photons than protons. In these models, we reevaluate the fluxes of neutrinos
associated with the highest energy cosmic rays in light of mounting evidence
that they are protons and not gamma rays. While proton dominance at EeV
energies can possibly be achieved by efficient absorption of the dominant
high-energy photon flux on universal and galactic photon and magnetic
background fields, we show that the associated neutrino flux is inevitably
increased to a level where it should be within reach of operating experiments
such as AMANDA II, RICE and AGASA. In future neutrino telescopes, tens to a
hundred, rather than a few neutrinos per kilometer squared per year, may be
detected above 1 PeV.


title: Constraints for nuclear gluon densities from DIS data

abstract:
  The $Q^2$ dependence of the ratios of nuclear structure functions $F_2^A$ is
studied by performing QCD evolution of nuclear parton distribution functions.
The log $Q^2$ slope of these ratios is very sensitive to the nuclear gluon
distribution function. Taking different parametrizations, we show that the NMC
data on the $Q^2$ dependence of $F_2^{\rm Sn}/F_2^{\rm C}$ rule out the case
where nuclear shadowing (suppression) of gluons at $x\sim 0.01$ is much larger
than the shadowing observed in the ratio $F_2^A/F_2^{\rm D}$. We also take into
account modifications to the DGLAP evolution by including gluon fusion terms
and see that the effect is small at present energies, and, in any case, a
strong gluon shadowing is not favored. The region studied ($x \sim 0.01$) is
the most relevant for RHIC multiplicities.


title: Electromagnetic corrections in the anomaly sector

abstract:
  Chiral perturbation theory in the anomaly sector for $N_f=2$ is extended to
include dynamical photons, thereby allowing a complete treatment of isospin
breaking. A minimal set of independent chiral lagrangian terms is determined
and the divergence structure is worked out. There are contributions from
irreducible and also from reducible one-loop graphs, a feature of ChPT at order
larger than four. The generating functional is non-anomalous at order $e^2p^4$,
but not necessarily at higher order in $e^2$. Practical applications to
$\gamma\pi\to\pi\pi$ and to the $\pi^0\to2\gamma$ amplitudes are considered. In
the latter case, a complete discussion of the corrections beyond current
algebra is presented including quark mass as well as electromagnetic effects.


title: Questions on Uncertainties in Parton Distributions

abstract:
  A discussion is presented of the manner in which uncertainties in parton
distributions and related quantities are determined. One of the central
problems is the criteria used to judge what variation of the parameters
describing a set of partons is acceptable within the context of a global fit.
Various ways of addressing this question are outlined.


title: Neutrino masses: hierarchy without hierarchy

abstract:
  A large hierarchy of the Dirac masses can result in a small hierarchy for the
low energy masses of the active neutrinos. This can happen even if the Majorana
masses of right-handed neutrinos are all equal. A realistic description of the
observed neutrino masses and mixing can be obtained starting from a large
hierarchy in the Dirac masses. A large mixing for solar neutrinos results from
the neutrino sector. The small value of the MNS matrix element U_e3 is a
natural consequence of the scheme. The masses of the two lighter neutrinos are
related to the solar neutrino mixing angle: mu_1/mu_2 = tan^2 theta_sol.


title: Uncertainties on Parton Related Quantities

abstract:
  I discuss the issue of uncertainties in parton distributions and in the
physical quantities which are determined in terms of them. While there has been
significant progress on the uncertainties associated with errors on
experimental data, there are still outstanding questions. Also, I demonstrate
that in many circumstances this source of errors may be less important than
errors due to underlying assumptions in the fitting procedure and due to the
incomplete nature of the theoretical calculations.


title:
Approximate Next-to-Leading Order and Next-to-Next-to-Leading Order
  Corrections

abstract:
  For processes involving structure functions and/or fragmentation functions,
arguments that, over a range of a proper kinematic variable, there is a part
that dominates the next-to-leading order (NLO) corrections are briefly
reviewed. The arguments are tested against more recent NLO and in particular
complete next-to-next-to-leading order (NNLO) calculations. A critical
examination of when these arguments may not be useful is also presented.


title: Natural Theories of Ultra-Low Mass PNGB's: Axions and Quintessence

abstract:
  We consider the Wilson Line PNGB which arises in a U(1)^N gauge theory,
abstracted from a latticized, periodically compactified extra dimension U(1).
Planck scale breaking of the PNGB's global symmetry is suppressed, providing
natural candidates for the axion and quintessence. We construct an explicit
model in which the axion may be viewed as the 5th component of the U(1)_Y gauge
field in a 1+4 latticized periodically compactified extra dimension. We also
construct a quintessence PNGB model where the ultra-low mass arises from
Planck-scale suppressed physics itself.


title: CP from strings: ideas and problems

abstract:
  CP has a natural embedding in superstring models as a gauge symmetry
involving inversion of the compactified space. Hence the source of CP violation
could be geometrical. Such models face the problem of how to suppress
contributions to fermion electric dipole moments from softly-broken
supersymmetry, as well as other problems of string phenomenology. Stringy
symmetries are useful in evaluating models, and rule out some scenarios.


title: $B \to X_s l^+l^-$ in the left-right supersymmetric model

abstract:
  We analyze the FCNC semileptonic decay $B \to X_s l^+l^-$ in a fully
left-right supersymmetric model. We give explicit expressions for all the
amplitudes involved in the process, and compare the numerical results with
experimental bounds, in both the constrained case (where the only flavor
violation comes from the Cabibbo-Kobayashi-Maskawa matrix) and the
unconstrained case (including soft breaking supersymmetry terms). Stringent
constraints on the parameter space of the model are obtained. We also include
constraints from $b \to s \gamma$.


title: Radion Induced Brane Preheating

abstract:
  When the interbrane separation in compact Randall-Sundrum models is
stabilized via the Goldberger-Wise mechanism, a potential is generated for the
four dimensional field that encodes this geometric information, the so-called
radion. Due to its origin as a part of the full five dimensional metric, the
radion couples directly to particles on both branes. We exhibit the exponential
growth in the number of brane particles due to parametric amplification from
radion oscillations and discuss some of the consequences of this process for
brane cosmology.


title: Solar neutrinos: global analysis with day and night spectra from SNO

abstract:
  We perform global analysis of the solar neutrino data including the day and
night spectra of events at SNO. In the context of two active neutrino mixing,
the best fit of the data is provided by the LMA MSW solution with Delta m^2 =
6.15 10^{-5} eV^2, tan^2\theta = 0.41, f_B = 1.05, where f_B is the boron
neutrino flux in units of the corresponding flux in the Standard Solar Model
(SSM). At 3 sigma level we find the following upper bounds: tan^2\theta < 0.84
and Delta m^2 < 3.6 10^{-4} eV^2. From 1 sigma-interval we expect the day-night
asymmetries of the charged current and electron scattering events to be:
A_{DN}^{CC} = 3.9 +3.6-2.9 and A_{DN}^{ES} = 2.1 +2.1-1.4. The only other
solution which appears at 3 sigma-level is the VAC solution with Delta m^2 =
4.5 10^{-10} eV^2, tan^2\theta = 2.1 and f_B=0.75. The best fit point in the
LOW region, with Delta m^2 = 0.93 10^{-7} eV^2 and tan^2\theta = 0.64, is
accepted at 99.95% (3.5 sigma) C.L. . The least chi^2 point from the SMA
solution region, with Delta m^2 = 4.6 10^{-6} eV^2 and tan^2\theta = 5 10^{-4},
could be accepted at 5.5 sigma-level only. In the three neutrino context the
influence of theta_{13} is studied. We find that with increase of theta_{13}
the LMA best fit point shifts to larger Delta m^2, mixing angle is practically
unchanged, and the quality of the fit becomes worse. The fits of LOW and SMA
slightly improve. Predictions for KamLAND experiment (total rates, spectrum
distortion) have been calculated.


title: Radion Couplings to Bulk Fields in the Randall-Sundrum Model

abstract:
  The radion may be the lightest new state present in the Randall-Sundrum(RS)
model. We examine the couplings of the radion to the Standard Model(SM) fields
in the scenario where they propagate in the bulk and expand into Kaluza-Klein
towers. These couplings are then contrasted with those of the more familiar
case where the SM fields are confined to the TeV brane. We find that the
couplings of the radion to both $gg$ and $\gamma\gamma$ can be significantly
different in these two cases. Implications for radion collider phenomenology
are discussed.


title: Option of light righthanded neutrinos avoiding oscillations

abstract:
  A new explicit model of neutrino texture is presented, where in the overall
6x6 mass matrix the lefthanded and righthanded Majorana 3x3 components are
diagonal with equal entries of opposite sign, while the Dirac 3x3 component is
given as a diagonal hierarchical structure (possibly similar to the charged
lepton and quark 3x3 mass matrices) deformed by the popular nearly bimaximal
3x3 mixing matrix. Then, all neutrino masses are light and m_1 = -m_4, m_2 =
-m_5, m_3 = -m_6. The resulting neutrino oscillation formulae are identical
with those working in the effective texture of three active neutrinos, based on
this nearly bimaximal mixing matrix. Three (conventional) sterile neutrinos do
not oscillate and so, are strictly decoupled. The suggested LSND effect
vanishes. The not observed Chooz oscillation effect is consistently negligible.


title:
The neutral Higgs boson masses of MSSM at one-loop level in explicit CP
  violation scenario

abstract:
  The neutral Higgs sector of the minimal supersymmetric standard model (MSSM)
in explicit CP violation scenario is investigated at the one-loop level. Within
the context of the effective potential formalism, the masses of the neutral
Higgs bosons are calculated at the one-loop level by taking into account the
contributions of the following loops of ordinary particles and superpartners:
top quark, the scalar top quarks, bottom quark, the scalar bottom quarks, tau
lepton, the scalar tau leptons, $W$ boson, the charged Higgs boson, the
charginos, $Z$ boson, the scalar and pseudoscalar Higgs bosons, and the
neutralinos. Our calculation is an improvement in the sense that both the terms
which are quartic in the electroweak coupling constants into account, and the
pseudoscalar Higgs loop contribution are explicitly included.


title: Self-energy correction to the bound-electron g factor in H-like ions

abstract:
  The one-loop self-energy correction to the 1s electron g factor is evaluated
to all orders in Z\alpha with an accuracy, which is essentially better than
that of previous calculations of this correction. As a result, the uncertainty
of the theoretical prediction for the bound-electron g factor in H-like carbon
is reduced by a factor of 3. This improves the total accuracy of the recent
electron-mass determination [Beier et al. Phys. Rev. Lett. 88, 011603 (2002)].
The new value of the electron mass is found to be m_e = 0.000 548 579 909 3(3)
u.


title:
Thermalization after inflation and production of massive stable
  particles

abstract:
  We discuss thermalization through perturbative inflaton decay at the end of
inflation. We find that a thermal plasma should form well before all inflatons
have decayed, unless all gauge symmetries are badly broken during that epoch.
However, before they thermalize, the very energetic inflaton decay products can
contribute to the production of massive stable particles, either through
collisions with the thermal plasma, or through collisions with each other. If
such reactions exist, the same massive particles can also be produced directly
in inflaton decay, once higher--order processes are included. We show that
these new, non--thermal production mechanisms often significantly strengthen
constraints on the parameters of models containing massive stable particles;
for example, stable charged particles with mass below the inflaton mass seem to
be essentially excluded.


title: Suppressing FCNC and CP-Violating Phases by Extra Dimensions

abstract:
  In extra dimensions the infrared attractive force of gauge interactions is
amplified. We find that this force can align in the infrared limit the
soft-supersymmetry breaking terms out of their anarchical disorder at a
fundamental scale, in such a way that flavor-changing neutral currents as well
as dangerous CP-violating phases are sufficiently suppressed at the unification
scale. The main assumption is that the matter and Higgs supermultiplets and the
flavor-dependent interactions such as Yukawa interactions are stuck at the
four-dimensional boundary. As a concrete example we consider the minimal model
based on SU(5) in six dimensions.


title:
The Search for Higgs particles at high-energy colliders: Past, Present
  and Future

abstract:
  I briefly review the Higgs sector in the Standard Model and its minimal
Supersymmetric extension, the MSSM. After summarizing the properties of the
Higgs bosons and the present experimental constraints, I will discuss the
prospects for discovering these particle at the upgraded Tevatron, the LHC and
a high-energy $e^+e^-$ linear collider. The possibility of studying the
properties of the Higgs particles will be then summarized.


title: Saturation at low x and nonlinear evolution

abstract:
  In this talk the results of the analytical and numerical analysis of the
nonlinear Balitsky-Kovchegov equation are presented. The characteristic BFKL
diffusion into infrared regime is suppressed by the generation of the
saturation scale. We identify the scaling and linear regimes for the solution.
We also study the impact of subleading corrections onto the nonlinear
evolution.


title: Gauging Away the Strong CP Problem

abstract:
  We propose a new solution to the strong-CP problem. It involves the existence
of an unbroken gauged $U(1)_X$ symmetry whose gauge boson gets a Stuckelberg
mass term by combining with a pseudoscalar field $\eta (x)$. The latter has
axion-like couplings to $F_{QCD}\wedge F_{QCD}$ so that the theta parameter may
be gauged away by a $U(1)_X$ gauge transformation. This system leads to mixed
gauge anomalies and we argue that they are cancelled by the addition of an
appropriate Wess-Zumino term, so that no SM fermions need to be charged under
$U(1)_X$. We discuss scenarios in which the above set of fields and couplings
appear. The mechanism is quite generic, but a natural possibility is that the
the $U(1)_X$ symmetry arises from bulk gauge bosons in theories with extra
dimensions or string models. We show that in certain D-brane Type-II string
models (with antisymmetric tensor field strength fluxes) higher dimensional
Chern-Simons couplings give rise to the required D=4 Wess-Zumino terms upon
compactification. In one of the possible string realizations of the mechanism
the $U(1)_X$ gauge boson comes from the Kaluza-Klein reduction of the
eleven-dimensional metric in M-theory.


title: Strange quark matter in a chiral SU(3) quark mean field model

abstract:
  We apply the chiral SU(3) quark mean field model to investigate strange quark
matter. The stability of strange quark matter with different strangeness
fraction is studied. The interaction between quarks and vector mesons
destabilizes the strange quark matter. If the strength of the vector coupling
is the same as in hadronic matter, strangelets can not be formed. For the case
of beta equilibrium, there is no strange quark matter which can be stable
against hadron emission even without vector meson interactions.


title: Phenomenology of A Three-Family Standard-like String Model

abstract:
  We discuss the phenomenology of a three-family supersymmetric Standard-like
Model derived from the orientifold construction, in which the ordinary chiral
states are localized at the intersection of branes at angles. In addition to
the Standard Model group, there are two additional U(1)' symmetries, one of
which has family non-universal and therefore flavor changing couplings, and a
quasi-hidden non-abelian sector which becomes strongly coupled above the
electroweak scale. The perturbative spectrum contains a fourth family of exotic
(SU(2)- singlet) quarks and leptons, in which, however, the left-chiral states
have unphysical electric charges. It is argued that these decouple from the low
energy spectrum due to hidden sector charge confinement, and that anomaly
matching requires the physical left-chiral states to be composites. The model
has multiple Higgs doublets and additional exotic states. The moduli-dependent
predictions for the gauge couplings are discussed. The strong coupling agrees
with experiment for reasonable moduli, but the electroweak couplings are too
small.


title: Percolation approach to quark gluon plasma in high energy pp collisions

abstract:
  We apply continuum percolation to proton-proton collisions and look for the
possible threshold to phase transition from confined nuclear matter to quark
gluon plasma. Making the assumption that J/Psi suppression is a good signal to
the transition, we discuss this phenomenon for pp collisions, in the framework
of a dual model with strings.


title:
Helicity analysis of the decays B --> K^* ell^+ ell^- and B --> rho ell
  nu_ell in the large Energy Effective Theory

abstract:
  We calculate the independent helicity amplitudes in the decays B --> K^*
ell^+ ell^- and B --> rho ell nu_ell in the so-called
Large-Energy-Effective-Theory (LEET). Taking into account the dominant
O(alpha_s) and SU(3) symmetry-breaking effects, we calculate various Dalitz
distributions in these decays making use of the presently available data and
decay form factors calculated in the QCD sum rule approach. Differential decay
rates in the dilepton invariant mass and the Forward-Backward asymmetry in B
--> K^* ell^+ ell^- are worked out. We also present the decay amplitudes in the
transversity basis which has been used in the analysis of data on the resonant
decay B --> K^* J/psi (--> ell^+ ell^-). Measurements of the ratios R_i(s)
equivalent to d Gamma_{H_i}(s)(B --> K^* ell^+ ell^-)/ d Gamma_{H_i}(s)(B -->
rho ell nu_ell), involving the helicity amplitudes H_i(s), i = 0,+1, -1, as
precision tests of the standard model in semileptonic rare B-decays are
emphasized. We argue that R_0(s) and R_{-}(s) can be used to determine the CKM
ratio |V_{ub}|/|V_{ts}| and search for new physics, where the later is
illustrated by supersymmetry.


title: Production of singlet P-wave $c \bar c$ and $b \bar b$ states

abstract:
  No spin-singlet $b \bar b$ quarkonium state has yet been observed. In this
paper we discuss the production of the singlet P-wave $b\bar{b}$ and $c\bar{c}$
$^1P_1$ states $h_b$ and $h_c$. We consider two possibilities. In the first the
$^1P_1$ states are produced via the electromagnetic cascades $\ups(3S) \to
\eta_b(2S) + \gamma \to h_b + \gamma \gamma \to \eta_b +\gamma\gamma\gamma $
and $\psi'\to \eta_c' + \gamma \to h_c + \gamma \gamma \to \eta_c +
\gamma\gamma\gamma$. A more promising process consists of single pion
transition to the $^1P_1$ state followed by the radiative transition to the
$1^1S_0$ state: $\ups(3S)\to h_b + \pi^0 \to \eta_b + \pi^0 +\gamma$ and $\psi'
\to h_c + \pi^0 \to \eta_c + \pi^0 +\gamma$. For a million $\ups(3S)$ or
$\psi'$'s produced we expect these processes to produce several hundred events.


title: Radion and Higgs Signals in Peripheral Heavy Ion Collisions at the LHC

abstract:
  We investigate the sensitivity of the heavy ion mode of the LHC to Higgs
boson and Radion production via photon-photon fusion through the analysis of
the processes photon to photon photon, photon photon to b anti-b, and photon
photon to g g in peripheral heavy ion collisions. We suggest cuts to improve
the Higgs and Radion signal over standard model background ratio and determine
the capability of LHC to detect these particles production.


title: On the Large Higher Order Corrections to Polarised Chargino Production

abstract:
  We calculate the radiative corrections to helicity amplitudes for chargino
production in electron-positron collisions. We include all weak self-energy,
triangle, and box diagrams, and find that the three are important and should be
included. We present results in the form of differential cross-sections for
four supersymmetry benchmark models, and find usually large corrections and in
some cases huge corrections. We conclude that in order to extract the
underlying parameters of the chargino sector from collider data taken at a
future Linear Collider, a complete theoretical one--loop production
cross-section should be used.


title:
On the Orthogonality of Independently Propagating States as Occurring in
  the Lee-Oehme-Yang Theory

abstract:
  We generalize a theorem by Khalfin, originally derived for the states $| F_1
> = | M^0>$, $| F_2 > = |\bar M^0>$, where $M^0$ is a neutral flavoured meson
(e.g., $K^0$ or $B_d^0$), by assuming CPT invariance. Dispensing with CPT
invariance and allowing for an arbitrary pair of orthogonal states $|
F_{1,2}>$, we show that any linear combinations $| P_a > = p_a | F_1 > + q_a |
F_2>$ and $| P_b > = p_b | F_1 > - q_b | F_2>$, if postulated to be
independently propagating in time, as in the Lee--Oehme--Yang Theory, must be
mutually orthogonal. This implies a reciprocity relation: equality of the
probabilities of the transitions $| F_1 > \leftrightarrow | F_2>$. Also implied
is another relation involving the coefficients $p_{a,b}$, $q_{a,b}$, which can
be interpreted as $\mathrm{Im} \theta = 0$, where $\theta$ is the
rephasing-invariant parameter describing CPT violation in $M^0 \bar M^0$ mixing
for Khalfin's choice of $| F_{1,2}>$. The states $| F_{1,2}>$ of \emph{our}
theorem need not form a particle-antiparticle pair, nor even be restricted to
particle physics.


title:
Implications on SUSY breaking mediation mechanisms from observing $B_s
  \to \mu^+ \mu^-$ and the muon $(g-2)$

abstract:
  We consider $B_s \to \mu^+ \mu^-$ and the muon $(g-2)_\mu$ in various SUSY
breaking mediation mechanisms. If the decay $B_s \to \mu^+ \mu^-$ is observed
at Tevatron Run II with a branching ratio larger than $\sim 2 \times 10^{-8} $,
the noscale supergravity (including the gaugino mediation), the gauge mediation
scenario with small number of messenger fields and low messenger scale, and a
class of anomaly mediation scenarios will be excluded, even if they can
accommodate a large muon $(g-2)_\mu$. On the other hand, the minimal
supergravity scenario and similar mechanisms derived from string models can
accommodate this observation.


title:
On the forward-backward charge asymmetry in e+e- -annihilation into
  hadrons at high energies

abstract:
  The forward-backward asymmetry in e+ e- annihilation into a quark-antiquark
pair is considered in the double-logarithmic approximation at energies much
higher than the masses of the weak bosons. It is shown that after accounting to
all orders for the exchange of virtual photons and W, Z -bosons one is lead to
the following effect (asymmetry): quarks with positive electric charge (e.g. u,
\bar{d}) tend to move in the e+ - direction whereas quarks with negative
charges (e.g. d, \bar{u}) tend to move in the e- - direction. The value of the
asymmetry grows with increasing energy when the produced quarks are within a
cone with opening angle, in the cmf, \theta_0\sim 2M_Z/\sqrt{s} around the e+e-
-beam. Outside this cone, at \theta_0 << \theta << 1, the asymmetry is
inversely proportional to \theta .


title: Which solar neutrino data favour the LMA solution?

abstract:
  Assuming neutrino oscillations, global analyses of solar data find that the
LOW solution is significantly disfavoured, leaving LMA as the best solution.
But the preference for LMA rests on three weak hints: the spectrum of earth
matter effects (Super-Kamiokande sees an overall day/night asymmetry only at 1
sigma), the Cl rate (but LMA and LOW predictions are both above the measured
value), the Ga rate (newer data decrease towards the LOW predictions both in
GNO and SAGE). Only new data will tell us if LMA is the true solution.


title:
Hadronic decays of B involving a tensor meson through a $b \to c$
  transition

abstract:
  We re-analyze hadronic decays of B mesons to a pseudoscalar (P) and a tensor
meson (T), or a vector meson (V) and a tensor meson, through a $b \to c$
transition. We discuss possible large uncertainties to branching ratios (BR's)
of the relevant modes, mainly arising from uncertainties to the hadronic form
factors for the $B \to T$ transition. The BR's and CP asymmetries for $B \to
PT$ and VT decays are then calculated by using the form factors given in the
ISGW2 model (the improved version of the original Isgur-Scora-Grinstein-Wise
(ISGW) model). We find that the estimated BR's of many modes are increased by
an order of magnitude, compared to the previous results calculated within the
ISGW model.


title:
Nonleptonic two-body charmless B decays involving a tensor meson in
  ISGW2 model

abstract:
  Nonleptonic charmless B decays into a pseudoscalar (P) or a vector (V) meson
accompanying a tensor (T) meson are re-analyzed. We scrutinize the hadronic
uncertainties and ambiguities of the form factors which appear in the
literature. The Isgur-Scora-Grinstein-Wise updated model (ISGW2) is adopted to
evaluate the relevant hadronic matrix elements. We calculate the branching
ratios and CP asymmetries for various $B\to P(V)T$ decay processes. With the
ISGW2 model, the branching ratios are enhanced by about an order of magnitude
compared to the previous estimates. We show that the ratios $\calB(B\to
VT)/\calB(B\to PT)$ for some strangeness-changing processes are very sensitive
to the CKM angle $\gamma$ ($\phi_3$).


title: Multiple seesaw at low energy

abstract:
  A new mechanism for generating neutrino masses without a high-energy mass
scale is proposed. The mechanism needs a fundamental mass scale M in the
100-1000 TeV region and a minimal field content beyond the Standard Model one
containing a pair of fermion singlets and a pair of weak doublet fermions for
each neutrino mass, all of them with a mass of order M. The neutrino mass
appears by a multiple seesaw-type tree-level diagram. We provide an explicit
model based on supersymmetry and an abelian symmetry which provides the
required fermion mass matrix. The mechanism is natural in the context of string
theories with a low fundamental scale. Within an explicit example where the
abelian symmetry is also responsible for the generation of fermion masses and
mixings, we give a hint relating the fermion mass matrices and the weak mixing
angle. By assuming the weak-strong couplings unification, one naturally finds
$\sin^2 \theta_w = 1/4$ at the fundamental scale.


title: Transplanckian collisions at future accelerators

abstract:
  Scattering at transplanckian energies offers model independent tests of TeV
scale gravity. Black-hole production is one spectacular signal, though a full
calculation of the cross section is not yet available. Another signal is given
by gravitational elastic scattering, which is maybe less spectacular but which
can be nicely computed in the forward region using the eikonal approximation.
In this talk I discuss the distinctive signatures of eikonalized scattering at
future accelerators.


title: Generating the primordial curvature perturbation from inflation

abstract:
  The scale--independence of the primordial curvature perturbation suggests
that it comes from the vacuum fluctuation during inflation of a light scalar
field. This field may be the inflaton, or a different `curvaton' field. The
observation of primordial non--gaussianity would be a smoking gun for the
curvaton model, while the observation of gravitational waves originating during
slow--roll inflation would rule out the model.


title:
Symmetry Nonrestoration in a Resummed Renormalized Theory at High
  Temperature

abstract:
  We reinvestigate the interesting phenomenon of symmetry nonrestoration at
high temperature in the multifield O(N_1) X O(N_2) model. We apply modified
self-consistent resummation (MSCR) in order to obtain the scalar dressed masses
and find in what circumstances a resummed multifield theory which has symmetry
(non)restoration can be renormalized. It is shown that, aside from the
consistency of the MSCR method, the basic ingredient that guarantees the
renormalization of a multifield model within a resummation approach is the T^2
mass behavior of field theory at high temperature.


title:
Gauge unification in 5-D SU(5) model with orbifold breaking of GUT
  symmetry

abstract:
  We consider a 5-dimensional SU(5) model wherein the symmetry is broken to the
4-dimensional Standard Model by compactification of the 5th dimension on an
S^1/(Z_2 \times Z^\prime_2) orbifold. We identify the members of all SU(5)
representations upto 75 which have zero modes. We examine how these light
scalars affect gauge coupling unification assuming a single intermediate scale
and present several acceptable solutions. The 5-D compactification scale
coincides with the unification scale of gauge couplings and is determined via
this renormalization group analysis. When SO(10) is considered as the GUT group
there are only two solutions, so long as a few low dimensional scalar
multiplets upto 126 are included.


title: Constraints on the Variations of the Fundamental Couplings

abstract:
  We reconsider several current bounds on the variation of the fine-structure
constant in models where all gauge and Yukawa couplings vary in an
interdependent manner, as would be expected in unified theories. In particular,
we re-examine the bounds established by the Oklo reactor from the resonant
neutron capture cross-section of 149Sm. By imposing variations in \Lambda_{QCD}
and the quark masses, as dictated by unified theories, the corresponding bound
on the variation of the fine-structure constant can be improved by about 2
orders of magnitude in such theories. In addition, we consider possible bounds
on variations due to their effect on long lived \alpha- and \beta-decay
isotopes, particularly 147Sm and 187Re. We obtain a strong constraint on \Delta
\alpha / \alpha, comparable to that of Oklo but extending to a higher redshift
corresponding to the age of the solar system, from the radioactive life-time of
187Re derived from meteoritic studies. We also analyze the astrophysical
consequences of perturbing the decay Q values on bound state \beta-decays
operating in the s-process.


title:
pp -> ttH, H->tau tau: toward a model independent determination of the
  Higgs boson couplings at the LHC

abstract:
  The possibility of detecting a Higgs boson through several production and
decay channels is instrumental to the measurement of its couplings. In this
paper we study the pp-> ttH(H-> tau tau) channel at the LHC, for the case of a
scalar Higgs boson, and use the obtained results to improve on existing
strategies toward a model independent determination of the Higgs boson
couplings. The case of a scalar Higgs boson with mass below 140 GeV looks
particularly promising.


title:
Thermalization of an Interacting Quantum Field in the CTP-2PI
  Next-to-leading-order Large N Scheme

abstract:
  In this paper we use an O(N)-invariant scalar field of unbroken symmetry to
investigate whether an interacting quantum field at the next-to-leading order
Large $N$ approximation may show signs of thermalization. We develop the closed
time-path (CTP) two-particle irreducible (2PI) effective action in powers of
1/N, retaining up to next to leading order (O(1)) terms, and write down the
corresponding (truncated) Schwinger-Dyson equations for its two point function.
We show that in this approximation, the only translation invariant solutions to
the Schwinger - Dyson equations are thermal. This provides a useful temperature
concept without invoking a heat bath. When combined with the familiar
Kadanoff-Baym approach to quantum kinetic theory our result shows that at this
order of approximation thermalization can occur, at least if initial conditions
are smooth enough that a derivative expansion is valid. Our analytic result
provides support for similar claims in recent literature based on numerical
evidence.


title: Scale Dependence of Hadronic Wave Functions and Parton Densities

abstract:
  We study how the components of hadronic wave functions in light-cone
quantization depend on the ultraviolet cut-off by relating them in a systematic
way to the matrix elements of a class of quark-gluon operators between the QCD
vacuum and the hadrons. From this, we derive an infinite set of scale-evolution
equations for the individual contributions to parton distributions from the
Fock expansion. When summed over all the contributions, we recover the
well-known DGLAP equation.


title: Non-leptonic decays of the B_c into tensor mesons

abstract:
  We have computed the branching ratios of the exclusive pseudoscalar (vector)
+ tensor modes that are allowed in the decays of the B_c meson. The dominant
spectator and annihilation contributions in those decays are evaluated using
the factorization hypothesis. We find that some of these decay channels, such
as B_c --> (\rho^-, D_s^{*-}, D_s^{-})\chi_{c2} and B_c^ -->\pi^-
\bar{B_{s2}^{*0}}, have branching ratios of the order of 10^{-4}, which seems
to be at the reach of forthcoming experiments at the LHC. The inclusive
branching fraction of the two-body B_c decays involving tensor particles is
approximately 1.28 x10^{-3}. At the dynamical level, it is interesting to
observe that the exclusive decays B_c --> K^-(\pi^-)\bar{D_2^{*0}}, \pi^0
D_2^{*-}, \eta^{'} D_{s2}^{*-} are dominated by the annihilation contributions.


title: Constraints on Light Bottom Squarks from Radiative B-Meson Decays

abstract:
  The presence of a light b-squark (with mass about 4 GeV) and gluino (with
mass about 15 GeV) might explain the observed excess in b-quark production at
the Tevatron. Though provocative, this model is not excluded by present data.
The light supersymmetric particles can induce large flavor-changing effects in
radiative decays of B mesons. We analyse the decays B->X_s gamma and B->X_{sg}
in this scenario and derive restrictive bounds on the flavor-changing
quark-squark-gluino couplings.


title:
Properties of Three-Body Decay Functions Derived with Time-Like Jet
  Calculus beyond Leading Order

abstract:
  Three-body decay functions in time-like parton branching are calculated using
the jet calculus to the next-to-leading logarithmic (NLL) order in perturbative
quantum chromodynamics (QCD). The phase space contributions from each of the
ladder diagrams and interference diagrams are presented. We correct part of the
results for the three-body decay functions calculated previously by two groups.
Employing our new results, the properties of the three-body decay functions in
the regions of soft partons are examined numerically. Furthermore, we examine
the contribution of the three-body decay functions modified by the restriction
resulting from the kinematical boundary of the phase space for two-body decay
in the parton shower model. This restriction leads to some problems for the
parton shower model. For this reason, we propose a new restriction introduced
by the kinematical boundary of the phase space for two-body decay.


title:
Incoherent Production of Charmonia off Nuclei As a Good Tool for Study
  of Color Transparency

abstract:
  Within a light-cone QCD formalism which incorporates color transparency (CT),
coherence length (CL) effects and gluon shadowing (GS) we study
electroproduction of charmonia off nuclei. In contrast to production of light
vector mesons (rho^0, phi^0) when at small and medium energies CT and the onset
of CL effects are not easily separated, in production of charmonia CT effects
dominate. We found rather large CT effects in the range of Q^2 < 20 GeV^2. They
are stronger at low than at high energies and can be easily identified by the
planned future experiments. Our parameter-free calculations explain well the
NMC data for variation with photon energy of the Sn/C ratio of nuclear
transparencies. We provide predictions for incoherent and coherent production
of charmonia for future measurements.


title:
Relativistic Electrodynamics without Reference Frames. Clifford Algebra
  Formulation

abstract:
  In the usual Clifford algebra formulation of electrodynamics the Faraday
bivector field $F$ is expressed in terms of \QTR{em}{the observer dependent}
relative vectors $\QTR{bf}{E}$ and $\QTR{bf}{B.}$ In this paper we present
\QTR{em}{the observer independent}decomposition of $F$ by using the vectors
(grade-1) of electric $E$ and magnetic $B$ fields and we develop the
formulation of relativistic electrodynamics which is independent of the
reference frame and of the chosen coordinatization. We also present equivalent
formulations by using the multivector (Clifford aggregate) $\Psi =E-e_{5}cB$
for the real Clifford algebra; $e_{5}$ is the (grade-4) pseudoscalar) or the
complex 1-vector $\Psi =E-icB$ (for the complex Clifford algebra; $i$ is the
unit imaginary). In such formulations the Maxwell equations become a Dirac like
relativistic wave equation for the free photon.


title:
Torsion constraints from the recent precision measurement of muon
  anomaly

abstract: The paper is being withdrawn because of some theoretical inconsistencies.


title: CP violation and baryogenesis

abstract:
  In these lecture notes an introduction is given to some ideas and attempts to
understand the origin of the matter-antimatter asymmetry of the universe. After
the discussion of some basic issues of cosmology and particle theory the
scenarios of electroweak baryogenesis, GUT baryogenesis, and leptogenesis are
outlined.


title:
Breaking the electroweak symmetry and supersymmetry by a compact extra
  dimension

abstract:
  We revisit in some more detail a recent specific proposal for the breaking of
the electroweak symmetry and of supersymmetry by a compact extra dimension.
Possible mass terms for the Higgs and the matter hypermultiplets are considered
and their effects on the spectrum analyzed. Previous conclusions are reinforced
and put on firmer ground.


title: Gauge dependence and renormalization of $\tan\beta$ in the MSSM

abstract:
  Well-known and newly developed renormalization schemes for $\tan\beta$ are
analyzed in view of three desirable properties: gauge independence, process
independence, and numerical stability in perturbation theory. Arguments are
provided that no scheme can meet all three requirements, and as an
illustration, a ``No-Go-Theorem'' for the renormalization of $\tan\beta$ is
established. Nevertheless, two particularly attractive schemes emerge. A
discussion about which scheme might be the best compromise in practice is
given.


title: Measuring alpha using B -> K(*) Kbar(*) Decays

abstract:
  We describe a new method for obtaining the CP phase alpha via measurements of
B_{d,s} -> K(*) Kbar(*) decays. This method is particularly appropriate for
hadron colliders since some of the branching ratios are small [O(10^{-6})], and
since B_s decays are involved. By comparing the value of alpha extracted from
this method with that obtained in B -> pi pi or B -> rho pi decays, one can
detect the presence of new physics in the b -> d penguin amplitude. The method
does require theoretical input, but model calculations suggest that the
theoretical uncertainty is at most 5%, and might well be even smaller. These
estimates can be tested experimentally. The method is therefore quite clean.


title: Matrix Elements and Parton Showers in Hadronic Interactions

abstract:
  A method is suggested to combine tree level QCD matrix for the production of
multi jet final states and the parton shower in hadronic interactions. The
method follows closely an algorithm developed recently for the case of $e^+e^-$
annihilations.


title: p-brane production in Fat brane or Universal extra dimension scenario

abstract:
  In models of large extra dimensions, the fundamental Planck scale can be as
low as TeV. Thus, in hadronic collisions interesting objects like black holes,
string balls, or $p$-branes can be produced. In scenarios of fat brane or
universal extra dimensions, the SM particles are allowed to propagate in the
extra spatial dimensions, which leads to the enhancement of production cross
sections of black holes and $p$-branes. Especially, the ratio of $p$-brane
cross section to the black hole cross section increases substantially, in
comparison with the original confined scenario. The ratio can be as large as
105 (for the case $n=7,m=5=p=r=k$).


title: Antares Sensitivity to Diffuse High Energy Neutrino Fluxes

abstract:
  The European collaboration ANTARES aims at operating a large deep-sea
neutrino telescope in the Mediterranean sea. The detection of high-energy
cosmic neutrino can improve our knowledge on the most powerful astrophysical
sources in the Universe and about the origins of cosmic rays. A first
Monte-Carlo study for the ANTARES sensitivity to diffuse neutrino fluxes
predicted by current models is reported.


title:
Determination of alpha_s from scaling violations of truncated moments of
  structure functions

abstract:
  We determine the strong coupling alpha_s(M_Z) from scaling violations of
truncated moments of the nonsinglet deep inelastic structure function F_2.
Truncated moments are determined from BCDMS and NMC data using a neural network
parametrization which retains the full experimental information on errors and
correlations. Our method minimizes all sources of theoretical uncertainty and
bias which characterize extractions of alpha_s from scaling violations. We
obtain alpha_s(M_Z) = 0.124 +0.004-0.007 (exp.) + 0.003- 0.004 (th.).


title:
The exclusive rare decays B -> K l(bar) l and B_c -> D(D*) l(bar) l in a
  relativistic quark model

abstract:
  We study the exclusive rare decay B -> K l(bar) l. We calculate the relevant
form factors within a relativistic constituent quark model, for the first time
without employing the impulse approximation. The calculated form factors are
used to evaluate differential decay rates and polarization observables. We
present results on the q2-dependence of a set of observables with and without
long-distance contributions. A similar analysis is done for the exclusive rare
decays B_c -> D (D*) l(bar) l with special emphasis on the cascade decay B_c ->
D* (-> D pi) l(bar) l. We derive a four-fold angular decay distribution for
this process in terms of helicity amplitudes including lepton mass effects. The
four-fold angular decay distribution allows to define a number of physical
observables which are amenable to measurement. We compare our results with the
results of other studies.


title: Are Neutrinos Democratic?

abstract:
  We generalize the notion of democratic mixing matrices for neutrinos and
propose a scheme in which the electron neutrino is a superposition of three
different mass eigenstates with equal weights. This scheme accounts for the
recent SNO results as well as atmospheric muon neutrino and electron neutrino
data. The outcomes of reactor neutrino and accelerator experiments are also
discussed.


title: Power Counting in the Soft-Collinear Effective Theory

abstract:
  We describe in some detail the derivation of a power counting formula for the
soft-collinear effective theory (SCET). This formula constrains which operators
are required to correctly describe the infrared at any order in the
Lambda_QCD/Q expansion (lambda expansion). The result assigns a unique
lambda-dimension to graphs in SCET solely from vertices, is gauge independent,
and can be applied independent of the process. For processes with an OPE the
lambda-dimension has a correspondence with dynamical twist.


title: No-go for detecting CP violation via neutrinoless double beta decay

abstract:
  We present a necessary condition on the solar oscillation amplitude for CP
violation to be detectable through neutrinoless double beta (0\nu\beta\beta)
decay. It depends only on the fractional uncertainty in the \nu_e-\nu_e element
of the neutrino mass matrix. We demonstrate that even under very optimistic
assumptions about the sensitivity of future experiments to the absolute
neutrino mass scale, and on the precision with which nuclear matrix elements
that contribute to 0\nu\beta\beta decay are calculable, it will be impossible
to detect neutrino CP violation arising from Majorana phases.


title:
Spin alignments of vector mesons in deeply inelastic lepton-nucleon
  scattering

abstract:
  We extend the calculations of the spin alignments of vector mesons in
$e^+e^-$ annihilation in a recent Rapid Communication to deeply inelastic
lepton-nucleon scatterings. We present the results for different mesons in the
current fragmentation regions of $\mu^- N$$ \to$$ \mu^- VX$ at high energies
and $\nu_\mu N $$\to$$ \mu^- VX$ at both high and low energies. We also present
the predictions for $\nu_\mu N$$ \to$$ \mu^- VX$ at NOMAD energies in the
target fragmentation region using a valence quark model.


title: Dynamics of Scalar field in a Brane World

abstract:
  We study the dynamics of a scalar field in the brane cosmology. We assume
that a scalar field is confined in our 4-dimensional world. As for the
potential of the scalar field, we discuss three typical models: (1) a power-law
potential, (2) an inverse-power-law potential, and (3) an exponential
potential. We show that the behavior of the scalar field is very different from
a conventional cosmology when the energy density square term is dominated.


title:
Reply to the Comment on "Evidence for Neutrinoless Double Beta Decay"
  [Mod. Phys. Lett. A 16(2001)2409]

abstract:
  As a coauthor of the article mentioned in the title, I discuss the criticism
in the comment of Aalseth et al. Part of the criticism is justified.


title: Neutrino Majorana Mass from Black Hole

abstract:
  We propose a new mechanism to generate the neutrino Majorana mass in
TeV-scale gravity models. The black hole violates all non-gauged symmetries and
can become the origin of lepton number violating processes. The fluctuation of
higher-dimensional spacetime can result in the production of a black hole,
which emits 2 neutrinos. If neutrinos are Majorana particles, this process is
equivalent to the free propagation of a neutrino with the insertion of the
black hole. From this fact, we derive the neutrino Majorana mass. The result is
completely consistent with the recently observed evidence of neutrinoless
double beta decay. And the obtained neutrino Majorana mass satisfies the
constraint from the density of the neutrino dark matter, which affects the
cosmic structure formation. Furthermore, we can explain the ultrahigh energy
cosmic rays by the Z-burst scenario with it.


title:
Exact Formulas and Simple CP dependence of Neutrino Oscillation
  Probabilities in Matter with Constant Density

abstract:
  We investigate neutrino oscillations in constant matter within the context of
the standard three neutrino scenario. We derive an exact and simple formula for
the oscillation probability applicable to all channels. In the standard
parametrization, the probability for $\nu_e$ $\to$ $\nu_{\mu}$ transition can
be written in the form $P(\nu_e \to
\nu_{\mu})=A_{e\mu}\cos\delta+B_{e\mu}\sin\delta+C_{e\mu}$ without any
approximation using CP phase $\delta$. For $\nu_{\mu}$ $\to$ $\nu_{\tau}$
transition, the linear term of $\cos 2\delta$ is added and the probability can
be written in the form $P(\nu_{\mu} \to
\nu_{\tau})=A_{\mu\tau}\cos\delta+B_{\mu\tau}
\sin\delta+C_{\mu\tau}+D_{\mu\tau}\cos 2\delta$. We give the CP dependences of
the probability for other channels. We show that the probability for each
channel in matter has the same form with respect to $\delta$ as in vacuum. It
means that matter effects just modify the coefficients $A$, $B$, $C$ and $D$.
We also give the exact expression of the coefficients for each channel.
Furthermore, we show that our results with respect to CP dependences are
reproduced from the effective mixing angles and the effective CP phase
calculated by Zaglauer and Schwarzer. Through the calculation, a new identity
is obtained by dividing the Naumov-Harrison-Scott identity by the Toshev
identity.


title:
A global assessment of the Strangeness including-Statistical Bootstrap
  Model analysis of nucleus-nucleus and proton-antiproton interactions

abstract:
  A strangeness and isospin asymmetry including statistical bootstrap model
analysis of the multiparticle system produced in the Pb+Pb collision at 158
AGeV at CERN is presented. It is concluded that this interaction process has
not crossed the deconfinenent line. Direct comparisons with the results of
similar analyses pertaining to nucleus-nucleus and proton-antiproton collisions
at CERN are made. The overall picture points to the S+S collision at 200 AGeV
as a prime candidate of a process which has crossed the border separating the
hadronic from the deconfined phase of matter.


title: Searching for New Physics in the rare decay B^+ \to D_s^+ \phi

abstract:
  The rare decay $B^+ \to D_s^+ \phi $ can occur only via annihilation type
diagram in the standard model. The small branching ratio predicted in the
standard model makes this channel sensitive to new physics contributions. We
analyze this decay mode, both in the standard model and in several extensions
of it. The models considered are minimal supersymmetric model with R-parity
violation and two Higgs doublet model. The experimental verification of our
findings of large branching ratio and/or nonzero CP asymmetry may signal the
presence of new physics.


title: Unraveling Violations of Parton-Hadron Duality in ep Scattering

abstract:
  Recent studies of the Q^2 dependence of ep scattering in the large x region
and in the Q^2 range: 1 < Q^2 <leq 30 Gev^2, confirm the validity of the
phenomenon of quark-hadron duality - the similarity of the deep inelastic
(parton) and resonance (hadron) spectra - for values of the invariant mass, W^2
> 2.4 GeV^2 At lower values of W^2, duality is found to be significantly
violated by an amount that cannot be parametrized in terms of the first few
terms of a series of power corrections. We present a dynamical model that
explains the Q^2 dependence of the data: at low W^2, non-partonic components
given by color neutral clusters dominate the cross section and the Q^2
dependence is governed by their mass spectrum, predicted within the
preconfiment property of Q CD; at large W^2 the structure function is
determined by a convolution of the cluster mass spectrum with the parton
distributions.


title:
Hadronic event structure, power corrections and the strong coupling at
  LEP

abstract:
  Infrared and collinear events shapes are suited to directly probe properties
of hard QCD. They are traditionally used to measure the strong coupling and to
test the gauge structure of QCD. Perturbative predictions exist in several
variations all of which depend on the renormalisation scheme leading to large
theoretical uncertainties in the determination of $alpha_s$. To overcome this
dominating error more and more schemes for setting the renormalisation scale
are investigated. The application of RGI perturbation theory shows an
incredible small spread of $\alpha_s$ indicating a reduced uncertainty and
allows a measurement of the $\beta$-function directly from mean values.


title:
Prospects to measure neutrino oscillation pattern with very large area
  underground detector at very long baselines

abstract:
  The concept of a very long baseline neutrino experiment with quasi
monochromatic neutrino beam and very large area underground detector is
discussed. The detector could be placed in the existing 20 km tunnel at IHEP,
Protvino. The High Intensity Proton Accelerators (HIPA) which are planned to be
built in Japan (JAERI-KEK, baseline of 7000 km) and Germany (GSI, baseline of
2000 km) as well as the Main Injector at Fermilab (7600 km) are considered as
possible sources of neutrino beams. The oscillations are analysed in the
three-neutrino scheme taking into account terrestrial matter effects. In the
proposed experiment it is feasible to observe the oscillation pattern as an
unique proof of the existence of neutrino oscillations. Precise measurements of
disappearance oscillation parameters of the muon neutrinos and antineutrinos
can be done within a reasonable time.


title: Two-Photon Processes and Photon Structure

abstract:
  In this article aspects of photon-photon physics related to the structure of
real and virtual photons are reviewed. A re-calculation of the virtual
photon-photon box is performed and some discrepancies in the literature are
clarified. A useful compilation of various relevant limits derived from the
most general expressions is provided. Furthermore, structure functions of
spin-averaged, transverse and longitudinal virtual target photons are defined
and discussed. Finally, the factorization of two-photon processes in the
Bjorken limit is demonstrated to hold also for the case of virtual target
photons.


title: Limits on Q-ball size due to gravity

abstract:
  Solitonic scalar field configurations are studied in a theory coupled to
gravity. It is found that non-topological solitons, Q-balls, are present in the
theory. Properties of gravitationally self coupled Q-balls are studied by
analytical and numerical means. Analytical arguments show that, unlike in the
typical flat space scenario, the size of Q-balls is ultimately limited by
gravitational effects. Even though the largest Q-balls are very dense, their
radii are still much larger than the corresponding Schwarzschild radii. Gravity
can also act as a stabilising mechanism for otherwise energetically unstable
Q-balls.


title: Muon Decay to One Loop Order in the Left-Right Symmetric Model

abstract:
  One loop corrections to the muon decay are studied in a popular and
self-consistent version of the Left-Right symmetric model. It is shown
quantitatively, that the corrections do not split into those that come from the
Standard Model sector and some decoupling terms. For a heavy Spontaneous
Symmetry Breaking (SSB) scale of the order of a least 1 TeV, the contributions
from the top quark have a logarithmic behaviour and there is a strong quadratic
dependence on the heavy Higgs scalar masses. The dependence on the light Higgs
boson mass is small. The heavy neutrinos are shown to play an important role,
although secondary in comparison with the heavy scalar particles as long as the
heavy neutrinos' Majorana Yukawa coupling matrix $h_M$ obeys unitarity bounds.


title:
Elimination of Threshold Singularities in the Relation Between On-Shell
  and Pole Widths

abstract:
  In a previous communication by two of us, Phys. Rev. Lett. 81, 1373 (1998),
the gauge-dependent deviations of the on-shell mass and total decay width from
their gauge-independent pole counterparts were investigated at leading order
for the Higgs boson of the Standard Model. In the case of the widths, the
deviation was found to diverge at unphysical thresholds, m_H = 2 root{xi_V} m_V
(V = W,Z), in the R_xi gauge. In this Brief Report, we demonstrate that these
unphysical threshold singularities are properly eliminated if a recently
proposed definition of wave-function renormalization for unstable particles is
invoked.


title: Charmonium Suppression and Regeneration from SPS to RHIC

abstract:
  The production of charmonia is investigated for heavy-ion collisions from SPS
to RHIC energies. Our approach incorporates two sources of $J/\Psi$ yield: (i)
a direct contribution arising from early (hard) parton-parton collisions,
subject to subsequent nuclear absorption, quark-gluon plasma and hadronic
dissociation, and (ii) statistical production at the hadronization transition
by coalescence of $c$ and $\bar{c}$ quarks. Within an expanding thermal
fireball framework, the model reproduces $J/\Psi$ centrality dependencies
observed at the SPS in Pb-Pb and S-U collisions reasonably well. The study of
the $\Psi'/\Psi$ ratio at SPS points at the importance of the hadronic phase
for $\Psi'$ interactions, possibly related to effects of chiral symmetry
restoration. Predictions are given for the centrality dependence of the
$N_{J/\Psi}/N_{c\bar{c}}$ ratio at full RHIC energy. We also calculate the
excitation function of this ratio. The latter exhibits a characteristic minimum
structure signalling the transition from the standard $J/\Psi$ suppression
scenario prevailing at SPS to dominantly thermal regeneration at collider
energies.


title: T violation in $B\to K^* \ell^+ \ell^-$ from SUSY

abstract:
  We propose to use T-odd momentum correlations as physical observables to
study T violation in $B\to K^{*}l^{+}l^{-} (l=e,\mu)$ decays. We show that
these observables are zero in the standard model but sizable at the level of
10% in the supersymmetric model. These large T violating effects are measurable
at the B-factories in KEK and SLAC and future hadron colliders. We also point
out that the T violating effects are insensitive to nonperturbative QCD
contributions.


title: Instanton Contribution to the Proton and Neutron Electric Form Factors

abstract:
  We study the instanton contribution to the proton and neutron electric form
factors. Using the single instanton approximation, we perform the calculations
in a mixed time-momentum representation in order to obtain the form factors
directly in momentum space. We find good agreement with the experimentally
measured electric form factor of the proton. For the neutron, our result falls
short of the experimental data. We argue that this discrepancy is due to the
fact that we neglect the contribution of the sea quarks. We compare to lattice
calculations and a relativistic version of the quark-diquark model.


title: Lagrangian evolution of global strings

abstract:
  We establish a method to trace the Lagrangian evolution of extended objects
consisting of a multicomponent scalar field in terms of a numerical calculation
of field equations in three dimensional Eulerian meshes. We apply our method to
the cosmological evolution of global strings and evaluate the energy density,
peculiar velocity, Lorentz factor, formation rate of loops, and emission rate
of Nambu-Goldstone (NG) bosons. We confirm the scaling behavior with a number
of long strings per horizon volume smaller than the case of local strings by a
factor of $\sim$ 10. The strategy and the method established here are
applicable to a variety of fields in physics.


title:
Anomalous magnetic and electric moments of $\tau$ and lepton flavor
  mixing matrix in effective lagrangian approach

abstract:
  In an effective lagrangian approach [EM97] to new physics, the authors in
ref. [HL99] pushed tau anomalous magnetic and electric dipole moments (AMDM and
EDM) down to $10^{-11}$ and $10^{-25} e cm$ by using a Fritzsch-Xing lepton
mass matrix ansatz. In this note, we find that, in this approach, there exists
the connection between $\tau$ AMDM and EDM and the lepton flavor mixing matrix.
By using the current neutrino oscillation experimental results, we investigate
the parameter space of lepton mixing angles to $\tau$ AMDM and EDM. We can
obtain the same or smaller bounds of $\delta a_\tau$ and $d_\tau$ acquired in
ref. [HL99] and constrain $\theta_l$ (the mixing angle obtained by
long-baseline neutrino oscillation experiments) from $\tau$ AMDM and EDM.


title: The mass insertion approximation without squark degeneracy

abstract:
  We study the applicability of the mass insertion approximation (MIA) for
calculations of neutral meson mixing when squark masses are not degenerate and,
in particular, in models of alignment. We show that the MIA can give results
that are much better than an order of magnitude estimate as long as the masses
are not strongly hierarchical. We argue that, in an effective two-squark
framework, m_q=(m_1+m_2)/2 is the best choice for the MIA expansion point,
rather than, for example, m_q^2=(m_1^2+m_2^2)/2.


title: Connecting nonleptonic and weak radiative hyperon decays

abstract:
  Using the recent measurement of the $\Xi ^0 \to \Lambda \gamma $ asymmetry as
an input, we reanalyse nonleptonic and weak radiative hyperon decays in a
single symmetry-based framework. In this framework the old S:P problem of
nonleptonic decays is automatically resolved when the most important features
of weak radiative decays are taken into account. Experimental data require that
symmetry between the two types of hyperon decays be imposed at the level of
currents, not fields. Previously established connections between hyperon decays
and nuclear parity violation imply that the conflict, originally suggested by
weak radiative decays, has to surface somewhere.


title:
QCD Corrections to t anti-b H^- Associated Production in e^+ e^-
  Annihilation

abstract:
  We calculate the QCD corrections to the cross section of e^+ e^- -> t anti-b
H^- and its charge-conjugate counterpart within the minimal supersymmetric
extension of the Standard Model. This process is particularly important if m_t
< m_H + m_b and root(s) < 2 m_H, so that t -> b H^+ and e^+ e^- -> H^+ H^- are
not allowed kinematically. Large logarithmic corrections that arise in the
on-mass-shell scheme of quark mass renormalization, especially from the t
anti-b H^- Yukawa coupling for large values of tan(beta), are resummed by
adopting the modified minimal-subtraction scheme, so that the convergence
behavior of the perturbative expansion is improved. The inclusion of the QCD
corrections leads to a significant reduction of the theoretical uncertainties
due to scheme and scale dependences.


title:
Boson ground state fields in electroweak theory with non-zero charge
  densities

abstract:
  The "non-linear" self-consistent theory of classical fields in the
electroweak model is proposed. Homogeneous boson ground state solutions in the
GSW model at the presence of a non-zero extended fermionic charge densities are
reviewed and fully reinterpreted to make the theory with non-zero charge
densities fruitful. Consequences of charge density fluctuations are proposed.


title: Bosonic Supersymmetry? Getting Fooled at the LHC

abstract:
  We define a minimal model with Universal Extra Dimensions, and begin to study
its phenomenology. The collider signals of the first KK level are surprisingly
similar to those of a supersymmetric model with a nearly degenerate
superpartner spectrum. The lightest KK particle (LKP) is neutral and stable
because of KK-parity. KK excitations cascade decay to the LKP yielding missing
energy signatures with relatively soft jets and leptons. Level 2 KK modes may
also be probed via their KK number violating decays to Standard Model
particles. In either case we provide initial estimates for the discovery
potential of the Tevatron and the LHC.


title: Power-Law Wave Functions and Generalized Parton Distributions for Pion

abstract:
  We propose a model for generalized parton distributions of the pion based on
the power-law ansatz for the effective light-cone wave function.


title: D0-D0bar Mixing

abstract:
  The main challenge in the Standard Model calculation of the mass and width
difference in $D^0 - \bar D^0$ mixing is to estimate the size of SU(3)
breaking. We prove that mixing occurs in the Standard Model only at second
order in SU(3) violation. We calculate SU(3) breaking due to phase space
effects, and find that it can naturally give rise to a width difference
$\Delta\Gamma / 2\Gamma \sim 1%$, potentially reducing the sensitivity of D
mixing to new physics.


title: Probing New Physics: From Charm to Superstrings

abstract:
  Effective theories based on experimental data provide powerful probes and
tests of underlying theories in elementary particle physics. Examples within
and beyond the Standard Model are discussed, including a specific model for
supersymmetry breaking within the context of the weakly coupled heterotic
string.


title: Quark-gluon vertex from lattice QCD

abstract:
  The quark-gluon vertex in Landau gauge is studied in the quenched
approximation using the Sheikholeslami-Wohlert (SW) fermion action with
mean-field improvement coefficients in the action and for the quark fields. We
see that the form factor that includes the running coupling is substantially
enhanced in the infrared, over and above the enhancement arising from the
infrared suppression of the quark propagator alone. We define two different
momentum subtraction renormalisation schemes -- \MOMT (asymmetric) and \MOMB\
(symmetric) -- and determine the running coupling in both schemes. We find
Lambda_msbar(N_f=0)=300(+150/-180)(55)(30) MeV from the asymmetric scheme. This
is somewhat higher than other determinations of this quantity, but the
uncertainties -- both statistical and systematic -- are large. In the symmetric
scheme, statistical noise prevents us from obtaining a meaningful estimate for
Lambda_msbar.


title: Geometric Scaling in a Symmetric Saturation Model

abstract:
  We illustrate geometric scaling for the photon-proton cross section with a
very simple saturation model. We describe the proton structure function F2 at
small x in a wide kinematical range with an elementary functional form and a
small number of free parameters. We speculate that the symmetry between low and
high Q2 recently discovered in the data could be related to a well-known
symmetry of the two-gluon- exchange dipole-dipole cross section.


title:
Extra Generations, Discrepancies of Electroweak Precision Data and Mass
  of the Higgs

abstract:
  The latest electroweak precision data are analyzed assuming the existence of
the fourth generation of leptons ($N, E$) and quarks ($U, D$), which are not
mixed with the known three generations. If all four new particles are heavier
than $Z$ boson, quality of the fit for the one new generation is as good as for
the Standard Model. In the case of neutral leptons with masses around 50 GeV
(``partially heavy extra generations'') the minimum of $\chi^2$ is between one
and two extra generations. The predicted value of the higgs mass $m_H$ in the
presence of the fourth generation can be made rather large. The quality of fits
drastically improves when the data on b- and c-quark asymmetries and new NuTeV
data on deep inelastic scattering are ignored.


title: On the Distribution of Secondaries at High Energies

abstract:
  We show within a geometrical model developed in earlier papers that
multiplicity distributions are cut off at large multiplicities. The position
and motion of the cut-off point is related to geometrical- and KNO scaling and
their violation, in particular by the rise of the ratio
$\sigma_{el}/\sigma_{t}.$ At the LHC energies a change of the regime, connected
with the transition from shadowing to antishadowing is expected.


title:
Convention-independent study of CP-violating asymmetries in $B \to \pi
  \pi$

abstract:
  CP-violating asymmetries in the decay $B^0(t)\to \pi^+ \pi^-$ are a
potentially rich source of information about both strong and weak phases. In a
previous treatment by the present authors use was made of an assumption about
the relative magnitude of tree and penguin amplitudes contributing to this
process. This assumption involved an ambiguity in relating the tree amplitude
to the amplitude for $B \to \pi \ell \nu$. It is shown here that one can avoid
this assumption, which adopted a particular convention for tree and penguin
amplitudes, and that the results are convention-independent.


title: Diffractive Contribution to $A_\perp$ asymmetry

abstract:
  We consider double spin asymmetries for longitudinally polarized leptons and
transversally polarized protons in diffractive vector meson and $Q \bar Q$
production at high energy range on the basis of two-gluon model. The asymmetry
predicted for meson production is quite small. Large asymmetry is expected for
$Q \bar Q$ production.


title: Updated Constraints on the Minimal Supergravity Model

abstract:
  Recently, refinements have been made on both the theoretical and experimental
determinations of the i.) mass of the lightest Higgs scalar (m_h), ii.) relic
density of cold dark matter in the universe (Omega_CDM h^2), iii.) branching
fraction for radiative B decay BF(b \to s \gamma), iv.) muon anomalous magnetic
moment (a_\mu), and v.) flavor violating decay B_s \to \mu^+\mu^-. Each of
these quantities can be predicted in the MSSM, and each depends in a
non-trivial way on the spectra of SUSY particles. In this paper, we present
updated constraints from each of these quantities on the minimal supergravity
(mSUGRA) model as embedded in the computer program ISAJET. The combination of
constraints points to certain favored regions of model parameter space where
collider and non-accelerator SUSY searches may be more focussed.


title: Perturbative and Non-Perturbative Issues in Heavy Quark Fragmentation

abstract:
  We review the state-of-the-art of our understanding of heavy quark
fragmentation. Recent e^+e^- data for B mesons are compared to the most
up-to-date theoretical predictions, and the need for inclusion of a
non-perturbative component is discussed. Experimental analyses in moments space
are suggested, and it is pointed out how perturbative and non-perturbative
contributions are to be properly matched. Failure to do so can result in large
phenomenological discrepancies. An example is given for B^+ hadroproduction at
the Tevatron.


title: Majorana neutrinos in a warped 5D standard model

abstract:
  We consider neutrino oscillations and neutrinoless double beta decay in a
five dimensional standard model with warped geometry. Although the see-saw
mechanism in its simplest form cannot be implemented because of the warped
geometry, the bulk standard model neutrinos can acquire the desired (Majorana)
masses from dimension five interactions. We discuss how large mixings can
arise, why the large mixing angle MSW solution for solar neutrinos is favored,
and provide estimates for the mixing angle U_e3. Implications for neutrinoless
double beta decay are also discussed.


title:
Extra Dimensions and the Universal Suppression of Higgs Boson
  Observables at High Energy Colliders

abstract:
  Precision electroweak data suggests the existence of a light Standard Model
Higgs boson. Its width is very narrow by an accident of the fermion mass
hierarchies, and so slight perturbations to the theory induce dramatic changes
in the phenomenology of direct Higgs boson production. Several theory ideas
motivated by low-scale extra dimensions lead to a universal rate suppression of
Higgs boson observables. The Tevatron and LHC will have difficulty accruing
compelling evidence for small universal suppression of rate observables, and
even more difficulty discerning the underlying cause. A high energy e+e-
collider would have relatively little trouble.


title: Constraints on the Bulk Standard Model in the Randall-Sundrum Scenario

abstract:
  We derive constraints on the Randall-Sundrum scenario with the standard model
fields in the bulk. These result from tree level effects associated with the
deformation of the zero mode wave-functions of the W and the Z once electroweak
symmetry is broken. Recently Cs\'{a}ki, Erlich and Terning pointed out that
this implies large contributions to electroweak oblique parameters. Here we
find that when fermions are allowed in the bulk the couplings of the $W$ and
the $Z$ to zero-mode fermions are also affected. We perform a fit to
electroweak observables assuming universal bulk fermion masses and including
all effects and find constraints that are considerably stronger than for the
case with fermions localized in the low energy boundary. These put the lowest
Kaluza-Klein excitation out of reach of the Large Hadron Collider. We then
relax the universality assumption and study the effects of flavor violation in
the bulk and its possible signatures.


title: Heavy Quark Production in Heavy Ion Colliders

abstract:
  We describe updated calculations of $Q \bar Q$ production in $pp$ and $\pi^-
p$ interactions. We compare these results to total cross section data and
discuss how the baseline cross sections extrapolate to heavy ion collider
energies. We touch upon the differences between leading and next-to-leading
order heavy quark production. Finally, we discuss the implications of our
calculations for quarkonium production. Our discussion here focuses on bottom
quarks.


title: Activated Sphalerons and Large Extra Dimensions

abstract:
  We present a new scenario for the baryon number violation that may take place
in models with large extra dimensions. Our idea is interesting because
leptogenesis with a low reheating temperature requires an alternative source of
the B+L violation to convert the produced leptons into baryons. If one
considers a model with an intermediate compactification radius, the reheating
temperature may be allowed to become higher than the critical temperature of
the conventional electroweak phase transition. Our mechanism is still important
in this case, because it provides the phase boundary, which is an essential
ingredient of the electroweak baryogenesis.


title: Higgs boson production via Double Pomeron Exchange at the LHC

abstract:
  We study Higgs boson production via Double Pomeron Exchange allowing for the
presence of Pomeron remnants. We estimate the number of events produced at the
LHC collider, as a function of the Higgs boson mass and its decay channel. The
model which successfully describes the high mass dijet spectrum observed at
Tevatron (run I) is used to predict rates of events with tagged protons for the
acceptance range of the CMS/Totem experiments. Sizeable cross-sections and
encouraging event selection signals are found, demonstrating especially for
smaller Higgs boson masses the importance to study the diffractive channels.
Tagging of the Pomeron remnants can be exploited to achieve a good resolution
on the Higgs boson mass for inclusive diffractive events, by optimizing an
intermediary analysis between higher cross-sections of the fully {\it
inclusive} mode (all Pomeron remnants) and cleaner signals of the {\it
exclusive} mode (without Pomeron remnants).


title: Do We Understand What Is Deconfinement?

abstract:
  An overview is given of different approaches to describing the process of
deconfinement in quantum chromodynamics. The analysis of the known approaches
demonstrates that the detailed picture of how deconfinement really occurs has
not yet been understood. Therefore, one has to be rather cautious when
interpreting experimental signals as attributed to deconfinement.


title: Nonperturbative quark dynamics in a baryon

abstract:
  Field-correlator method is used to calculate nonperturbative dynamics of
quarks in a baryon. General expression for the 3q Green's function is obtained
using Fock-Feynman-Schwinger (world-line) path integral formalism, where all
dynamics is contained in the 3q Wilson loop with spin-field insertions. Using
lowest cumulant contribution for Wilson loop one obtains an Y-shaped string
with a deep hole at the string junction position. Using einbein formalism for
the quark kinetic terms one automatically obtains constituent quark masses,
calculable through the string tension. Resulting effective action for 3q plus
Y-shaped strings is quantized in the path-integral formalism to produce two
versions of Hamiltonian,one -in the c.m. and another in the light-cone system.
Hyperspherical formalism is used to calculate masses and wave functions. Simple
estimates in lowest approximation yield baryon masses in good agreement with
experiment without fitting parameters.


title: On universality of the coupling of neutrinos to Z

abstract:
  We employ an effective Lagrangian approach and use LEP data to place severe
bounds on universality violations of the couplings of $\nu_e$, $\nu_\mu$, and
$\nu_\tau$ to the $Z$ boson. Our results justify the assumption of universality
in these couplings that is usually made, as for example in the analysis of
solar neutrinos detected at SNO.


title: Flipping SU(5) out of Trouble

abstract:
  Minimal supersymmetric SU(5) GUTs are being squeezed by the recent values of
alpha_s, sin^2 theta_W, the lower limit on the lifetime for p to nubar K decay,
and other experimental data. We show how the minimal flipped SU(5) GUT survives
these perils, accommodating the experimental values of alpha_s and sin^2
theta_W and other constraints, while yielding a p to e/mu+ pi0 lifetime beyond
the present experimental limit but potentially accessible to a further round of
experiments. We exemplify our analysis using a set of benchmark supersymmetric
scenarios proposed recently in a constrained MSSM framework.


title: The Formation of Classical Defects After a Slow Quantum Phase Transition

abstract:
  Classical defects (monopoles, vortices, etc.) are a characteristic
consequence of many phase transitions of quantum fields. We show a model in
which the onset of classical probability distributions, for the long-wavelength
modes at early times, allows the identification of line-zeroes of the field
with vortex separation. We obtain a refined version of Kibble's causal results
for defect separation, but from a completely different approach. It is apparent
that vortices are not created from thermal fluctuations in the Ginzburg regime.


title: T-odd Correlations in pi->e nu_e gamma Decay

abstract:
  The transverse lepton polarization asymmetry in pi_e2gamma decay may probe
T-violating interactions beyond the Standard Model. Dalitz plot distributions
of the expected effects are presented and compared to the contribution from the
Standard Model final state interactions. We give an example of a
phenomenologically viable model, where a considerable contribution to the
transverse lepton polarization asymmetry arises.


title: Sgoldstinos: Primaries of Ultra-High Energy Cosmic Rays

abstract:
  I describe supersymmetric extensions of the Standard Model with light
sgoldstinos and discuss the explanation of Ultra High Energy Cosmic Rays above
GZK cutoff in these models. Also I briefly discuss the possibility to solve
other cosmological and astrophysical puzzles, such as gamma-ray bursts and
dimming of high-redshift supernovae, within the models with light sgoldstinos.


title:
The fundamental constants and their variation: observational status and
  theoretical motivations

abstract:
  This article describes the various experimental bounds on the variation of
the fundamental constants of nature. After a discussion on the role of
fundamental constants, of their definition and link with metrology, the various
constraints on the variation of the fine structure constant, the gravitational,
weak and strong interactions couplings and the electron to proton mass ratio
are reviewed. This review aims (1) to provide the basics of each measurement,
(2) to show as clearly as possible why it constrains a given constant and (3)
to point out the underlying hypotheses. Such an investigation is of importance
to compare the different results, particularly in view of understanding the
recent claims of the detections of a variation of the fine structure constant
and of the electron to proton mass ratio in quasar absorption spectra. The
theoretical models leading to the prediction of such variation are also
reviewed, including Kaluza-Klein theories, string theories and other
alternative theories and cosmological implications of these results are
discussed. The links with the tests of general relativity are emphasized.


title: $K\to3\pi$ Decays in Chiral Perturbation Theory

abstract:
  The CP conserving amplitudes for the decays $K\to3\pi$ are calculated in
Chiral Perturbation Theory at the next-to-leading order. We present the
expressions in a compact form with single parameter functions only. These
expressions are then fitted to all available $K\to2\pi$ and $K\to3\pi$ data to
obtain a fit of the parameters that occur. We compare with the work of Kambor,
Missimer and Wyler.


title: Higgs Boson Decay into Hadronic Jets

abstract:
  The remarkable agreement of electroweak data with standard model (SM)
predictions motivates the study of extensions of the SM in which the Higgs
boson is light and couples in a standard way to the weak gauge bosons.
Postulated new light particles should have small couplings to the gauge bosons.
Within this context it is natural to assume that the branching fractions of the
light SM-like Higgs boson mimic those in the standard model. This assumption
may be unwarranted, however, if there are non-standard light particles coupled
weakly to the gauge bosons but strongly to the Higgs field. In particular, the
Higgs boson may effectively decay into hadronic jets, possibly without
important bottom or charm flavor content. As an example, we present a simple
extension of the SM, in which the predominant decay of the Higgs boson occurs
into a pair of light bottom squarks that, in turn, manifest themselves as
hadronic jets. Discovery of the Higgs boson remains possible at an
electron-positron linear collider, but prospects at hadron colliders are
diminished substantially.


title: Gluon Saturation and S-Matrix Unitarity

abstract:
  The impact parameter dependent gluon distribution of the proton xG(x,Q^2,b)
is investigated in a loop-loop correlation model that respects the S-matrix
unitarity condition in impact parameter space. We find low-x saturation of
G(x,Q^2,b) as a manifestation of S-matrix unitarity. The integrated gluon
distribution xG(x,Q^2) does not saturate because of the growth of the effective
proton radius with decreasing x.


title: Field localization in warped gauge theories

abstract:
  We present four-dimensional gauge theories that describe physics on
five-dimensional curved (warped) backgrounds, which includes bulk fields with
various spins (vectors, spinors, and scalars). Field theory on the AdS$_5$
geometry is examined as a simple example of our formulation. Various properties
of bulk fields on this background, e.g., the mass spectrum and field
localization behavior, can be achieved within a fully four-dimensional
framework. Moreover, that gives a localization mechanism for massless vector
fields. We also consider supersymmetric cases, and show in particular that the
conditions on bulk masses imposed by supersymmetry on warped backgrounds are
derived from a four-dimensional supersymmetric theory on the flat background.
As a phenomenological application, models are shown to generate hierarchical
Yukawa couplings. Finally, we discuss possible underlying mechanisms which
dynamically realize the required couplings to generate curved geometries.


title: Light Gluino, Light Bottom Squark Scenario, and LEP Predictions

abstract:
  The scenario of light gluinos and light sbottoms was advocated to explain the
discrepancy between the measured and theoretical production of $b$ quarks at
the Tevatron. This scenario will have model-independent predictions for $Z\to
q\bar q \tilde{g} \tilde{g}$ at the $Z^0$-pole, and $e^+ e^- \to q\bar q
\tilde{g} \tilde{g}$ at LEPII. We show that the data for $Z\to q \bar q g^* \to
q\bar q b \bar b$ at LEPI cannot constrain the scenario, because the ratio
$\Gamma(Z \to q\bar q \tilde{g} \tilde{g})/ \Gamma(Z \to q \bar q g^* \to q\bar
q b \bar b) = 0.15 - 0.04$ for $m_{\tilde{g}}= 12-16$ GeV is smaller than the
uncertainty of the data. However, at LEPII the ratio $\sigma(e^+ e^- \to q\bar
q \tilde{g} \tilde{g})/ \sigma(e^+ e^- \to q \bar q g^* \to q\bar q b \bar b)
\simeq 0.4 - 0.2$ for $m_{\tilde{g}}= 12-16$ GeV, which may give an observable
excess in $q\bar q b\bar b$ events; especially, the $4b$ events.


title: On the Vafa-Witten Theorem on Spontaneous Breaking of Parity

abstract:
  We revisit the proof provided by Vafa and Witten that there is no spontaneous
parity breaking in theories with vector-like fermions. We argue that the
various criticisms that have been leveled at the original proof do not
invalidate it.


title: Left-right symmetry in 5D and neutrino mass in TeV scale gravity models

abstract:
  We construct a left-right symmetric model based on the gauge group
$SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ in five dimensions where both the
gauge bosons and fermions reside in all five dimensions. The orbifold boundary
conditions are used not only to break the gauge symmetry down to $SU(2)_L\times
U(1)_Y\times U(1)_{Y'}$ but also to ``project'' the right handed neutrino out
of the zero mode part of the spectrum, providing a new way to understand the
small neutrino masses without adding (singlet) bulk neutrinos. This formulation
of the left-right model has also two new features: (i) it avoids most existing
phenomenological bounds on the scale of the right handed $W_R$ boson allowing
for the possibility that the right handed gauge bosons could have masses under
a TeV, and (ii) it predicts a stable lepton with mass of order of the inverse
radius of the fifth dimension.


title: Magnetic catalysis and anisotropic confinement in QCD

abstract:
  The expressions for dynamical masses of quarks in the chiral limit in QCD in
a strong magnetic field are obtained. A low energy effective action for the
corresponding Nambu-Goldstone bosons is derived and the values of their decay
constants as well as the velocities are calculated. The existence of a
threshold value of the number of colors $N^{thr}_c$, dividing the theories with
essentially different dynamics, is established. For the number of colors $N_c
\ll N^{thr}_c$, an anisotropic dynamics of confinement with the confinement
scale much less than $\Lambda_{QCD}$ and a rich spectrum of light glueballs is
realized. For $N_c$ of order $N^{thr}_c$ or larger, a conventional confinement
dynamics takes place. It is found that the threshold value $N^{thr}_c$ grows
rapidly with the magnetic field [$N^{thr}_c \gtrsim 100$ for $|eB| \gtrsim
(1{GeV})^2$]. In contrast to QCD with a nonzero baryon density, there are no
principal obstacles for checking these results and predictions in lattice
computer simulations.


title:
Cosmic Microwave Background, Matter-Antimatter Asymmetry and Neutrino
  Masses

abstract:
  We study the implications of thermal leptogenesis for neutrino parameters.
Assuming that decays of N_1, the lightest of the heavy Majorana neutrinos,
initiate baryogenesis, we show that the final baryon asymmetry is determined by
only four parameters: the CP asymmetry epsilon_1, the heavy neutrino mass M_1,
the effective light neutrino mass \tilde{m}_1, and the quadratic mean \bar{m}
of the light neutrino masses. Imposing the CMB measurement of the baryon
asymmetry as constraint on the neutrino parameters, we show, in a model
independent way, that quasi-degenerate neutrinos are incompatible with thermal
leptogenesis. For maximal CP asymmetry epsilon_1, and neutrino masses in the
range from (\Delta m^2_{sol})^{1/2} to (\Delta m^2_{atm})^{1/2}, the
baryogenesis temperature is T_B = O(10^{10}) GeV.


title: Scattering and Resonances in QCD_2

abstract:
  Extending previous works on the spectrum of QCD_2, we now investigate the 2D
analogue of meson-baryon scattering. We use semi-classical methods, perturbing
around classical soliton solutions. We start with the abelian case,
corresponding to one flavor,and find that in this case the effective potential
is reflectionless. We obtain an explicit expression for the forward phase
shift. In the non-abelian case of several flavors, the method yields a
potential which depends on the momentum of the incoming particle. In this case
there is both transmission and reflection. In both cases no resonances appear.
As a byproduct, we derive the general conditions for a 2D quantum field
theoretical action to yield a reflectionless effective potential when one
expands in small fluctuations about the classical solution.


title: Search for Missing Charmonium States in B-meson Decays

abstract:
  The recent progress in experiments at B-factories suggests an opportunity to
search for missing charmonium states $\eta_{c}'(2^1S_0)$ and $h_c(1^1P_1)$. The
feasibility of such a search in B-meson decays are discussed.


title: The Cheshire Cat Hadrons Revisited

abstract:
  The notion of Cheshire Cat Principle in hadron structure developed in a 1993
lecture note is revisited by correcting nontrivial errors committed in the
lecture and bringing up to date with the recent developments on the "vector
manifestation" of chiral symmetry a la Harada-Yamawaki.


title: Family Hierarchy and Large Neutrino Mixings

abstract:
  The recent neutrino data seem to favor two large and one small mixing angles
and a hierarchy of their squared mass differences. We discuss these within the
context of hierarchical neutrino masses. We show that this scheme suggests a
specific neutrino mass matrix with mild fine-tuning. We then present a
Froggatt-Nielsen model that reproduces this matrix.


title:
Prompt Multi-Gluon Production in High Energy Collisions from Singular
  Yang-Mills Solutions

abstract:
  We study non-perturbative parton-parton scattering in the Landau method using
singular O(3) symmetric solutions to the Euclidean Yang-Mills equations. These
solutions combine instanton dynamics (tunneling) and overlap (transition)
between incoming and vacuum fields. We derive a high-energy solution at small
Euclidean times, and assess its susequent escape and decay into gluons in
Minkowski space-time. We describe the spectrum of the {\it outgoing} gluons and
show that it is related through a particular rescaling to the Yang-Mills
sphaleron explosion studied earlier. We assess the number of {\it incoming}
gluons in the same configuration, and argue that the observed scaling is in
fact more general and describes the energy dependence of the spectra and
multiplicities at {\it all} energies. Applications to hadron-hadron and
nucleus-nucleus collisions are discussed elsewhere.


title: $B \to D_s \pi$ and the tree amplitude in $B \to \pi^+ \pi^-$

abstract:
  The recently-observed decay $B^0 \to D_s^+ \pi^-$ is expected to proceed
mainly by means of a tree amplitude in the factorization limit: $B^0 \to \pi^-
{(W^+)}^*$, ${(W^+)}^* \to D_s^+$. Under this assumption, we predict the
corresponding contribution of the tree amplitude to $B^0 \to \pi^+ \pi^-$. We
indicate the needed improvements in data that will allow a useful estimate of
this amplitude with errors comparable to those accompanying other methods.
Since the factorization hypothesis for this process goes beyond that proved in
most approaches, we also discuss independent tests of this hypothesis.


title:
The decay pi0 to gamma gamma to next to leading order in Chiral
  Perturbation Theory

abstract:
  The two photon decay width of the neutral pion is analyzed within the
combined framework of Chiral Perturbation Theory and the 1/Nc expansion up to
order p^6 and p^4 times 1/Nc in the decay amplitude. The eta' is explicitly
included in the analysis. It is found that the decay width is enhanced by about
4.5% due to the isospin-breaking induced mixing of the pure U(3) states. This
effect, which is of leading order in the low energy expansion, is shown to
persist nearly unchanged at next to leading order. The chief prediction for the
width with its estimated uncertainty is 8.10+-0.08 eV. This prediction at the
1% level makes the upcomming precision measurement of the decay width even more
urgent.
  Observations on the eta and eta' can also be made, especially about their
mixing, which is shown to be significantly affected by next to leading order
corrections.


title:
Kaluza-Klein gravitino production with a single photon at e^+ e^-
  colliders

abstract:
  In a supersymmetric large extra dimension scenario, the production of
Kaluza-Klein gravitinos accompanied by a photino at e^+ e^- colliders is
studied. We assume that a bulk supersymmetry is softly broken on our brane such
that the low-energy theory resembles the MSSM. Low energy supersymmetry
breaking is further assumed as in GMSB, leading to sub-eV mass shift in each KK
mode of the gravitino from the corresponding graviton KK mode. Since the
photino decays within a detector due to its sufficiently large inclusive decay
rate into a photon and a gravitino, the process e^+ e^- -> photino + gravitino
yields single photon events with missing energy. Even if the total cross
section can be substantial at sqrt(s)=500 GeV, the KK graviton background of
e^+ e^- -> photon + graviton is kinematically advantageous and thus much
larger. It is shown that the observable, sigma(e^-_L)-sigma(e^-_R), can
completely eliminate the KK graviton background but retain most of the KK
gravitino signal, which provides a unique and robust method to probe the
supersymmetric bulk.


title:
A Detailed Analysis of One-loop Neutrino Masses from the Generic
  Supersymmetric Standard Model

abstract:
  In the generic supersymmetric standard model which had no global symmetry
enforced by hand, lepton number violation is a natural consequence.
Supersymmetry, hence, can be considered the source of experimentally demanded
beyond standard model properties for the neutrinos. With an efficient
formulation of the model, we perform a comprehensive detailed analysis of all
one-loop contributions to neutrino masses.


title:
Upward and Horizontal Tau Air-showers from Earth Crust Crowns: Traces of
  Highest Energy Neutrinos Beam Dump in Widest Volumes

abstract:
  The expected Ultra High Energy Neutrino signals from PeVs up to GZK energies
may arise as Upward and Horizontal Tau air Showers, UPTAUS and HORTAUS,
flashing toward mountain peaks, airplanes, balloons and satellites. The Areas,
Volumes and Masses from these Terrestrial Corona at each height are estimated
for present and future Tau Air-Showering experiments. While observing from high
mountains these masses are comparable to few km^3 volumes above EeVs neutrino
energies and they may even exceed 150 km^3 at GZK energies, (E > = 10^19 eV),
while being recording from a satellite looking toward terrestrial Horizontal
Crown edges from orbit altitudes.


title: The Standard Model of Particle Physics: Status & Low-Energy Tests

abstract:
  Precision measurements of low-energy observables provide stringent tests of
the Standard Model structure and accurate determinations of its parameters. An
overview of the present experimental status is presented. The main topics
discussed are the muon anomalous magnetic moment, the asymptotic freedom of
strong interactions, the lepton universality of gauge couplings, the quark
flavour structure and CP violation.


title: Coulomb Interference in High-Energy pp and pbar p Scattering

abstract:
  An analysis of the Coulombic amplitude and its interference with the nuclear
amplitude which is driven by the three-component Pomeron is presented. It is
shown that different approaches towards the Coulomb phase evaluation give
approximately uniform result at all energies and the difference is negligible
at RHIC and LHC energies. We show that the use of the amplitude which was
fitted to accomodate nucleon data only (in the region 0.01 < |t| < 14.5
(GeV^2)) combined with the Coulomb amplitude, reproduces the existing data in
the Coulomb interference domain quite accurately without any adjustement of the
parameters. As a consequence, we predict the differential cross section in the
region of the Coulomb nucleon interference for both RHIC and LHC energies.


title:
Exclusive B-meson Rare Decays and General Relations of Form Factors in
  Effective Field Theory of Heavy Quarks

abstract:
  B meson rare decays ($B\to K(K^{*})l\bar l$ and $B\to K^*\gamma$) are
analyzed in the framework of effective field theory of heavy quarks. The
semileptonic and penguin type form factors for these decays are calculated by
using the light cone sum rules method at the leading order of $1/m_Q$
expansion. Four exact relations between the two types of form factors are
obtained at the leading order of $1/m_Q$ expansion. Of particular, the
relations are found to hold for whole momentum transfer region. We also
investigate the validity of the relations resulted from the large energy
effective theory based on the general relations obtained in the present
approach. The branching ratios of the rare decays are presented and their
potential importance for extracting the CKM matrix elements and probing new
physics is emphasized.


title: T violation in (Lambda_b -> Lambda l^+ l^-) decay beyond standard model

abstract:
  Using the most general, model independent form of effective Hamiltonian, the
transverse polarization P_T of Lambda in Lambda_b -> Lambda l^+ l^- decay is
studied. It is observed that the averaged <P_T> is very sensitive to the
existence of new physics and can attain large values, which can be measured at
future colliders.