title:
Search for Narrow-Width ttbar Resonances in ppbar Collisions at center
  of mass energy = 1.8 TeV

abstract:
  We present a preliminary result on a search for narrow-width resonances that
decay into ttbar pairs using 130 pb^{-1} of lepton plus jets data in ppbar
collisions at center of mass energy = 1.8 TeV. No significant deviation from
Standard Model prediction is observed. 95% C.L. upper limits on the production
cross section of the narrow-width resonance times its branching fraction to
ttbar are presented for different resonance masses, M_X. We also exclude the
existence of a leptophobic topcolor particle, X, with M_X < 560 GeV/c^2 for a
width \Gamma_X = 0.012 M_X.


title: Is a laser "wire" a non-invasive method?

abstract:
  A tightly focused laser beam (laser wire) is used for measurement of
transverse electron beam sizes in storage rings and linear colliders.
  It is assumed that the laser beam does nothing with the electron beam except
Compton scatterings which happen with a rather small probability. In reality,
electrons crossing the laser beam get kicks (with 100 % probability)
proportional to the square of the laser field and inversely proportional to the
beam energy. In practical cases of beam diagnostics this effect is negligible.


title: Production Asymmetry of $D_s$ from 600 GeV/c $\Sigma^-$ and $\pi^-$ beam

abstract:
  The production of $D_s^-$ relative to $D_s^+$ as a function of $x_F $ with
600 GeV/c $\Sigma^-$ beam is measured in the interval $0.15 < x_F < 0.7$ by the
SELEX (E781) experiment at Fermilab. The integrated charge asymmetries with 600
GeV/c $\Sigma^-$ beam ($0.53\pm0.06$) and $\pi^-$ beam ($0.06\pm0.11$) are also
compared. The results show the $\Sigma^-$ beam fragments play a role in the
production of $D_s^-$, as suggested by the leading quark model.


title:
Photoproduction of W Bosons at HERA: Reweighting Method for implementing
  QCD Corrections in Monte Carlo Programs

abstract:
  A procedure of implementing QCD corrections in Monte Carlo programs by a
reweighting method is described for the photoproduction of W bosons at HERA.
Tables for W boson production in LO and NLO are given in bins of the transverse
momentum of the W boson and its rapidity.


title:
Multianode Photo Multiplier Tubes as Photo Detectors for Ring Imaging
  Cherenkov Detectors

abstract:
  The 64-channel Multianode Photo Multiplier (MaPMT) has been evaluated as a
candidate for the LHCb Ring Imaging Cherenkov (RICH) photo detectors. We
present result from data taken with a 3x3 array of closely packed MaPMTs
mounted onto the RICH 1 prototype vessel, exposed to charged particle beams at
CERN, and read out at LHC speed. Using a LED light source, we have performed
spatial light scans to study the light collection efficiency of the MaPMTs We
have also measured the performance of the MaPMTs as a function of the applied
high voltage. Different dynode resistor chains have been used to study the
tubes at low gains. In addition, we have studied the behaviour of the MaPMT in
magnetic fields.


title: Measurements of |Vub| and |Vcb| from CLEO

abstract:
  I report results from the CLEO collaboration on semileptonic B decays,
highlighting measurements of the Cabibbo-Kobayashi-Maskawa matrix elements
|Vub| and |Vcb|. I describe the techniques used to obtain the recent
improvements in precision for these measurements, notably the use of the b -> s
gamma photon spectrum to constrain non-perturbative hadronic effects in
semileptonic B decays.


title:
Effects of FSI, CR and BEC at Small Relative Momenta of Particles and
  W-mass Systematics at LEP

abstract:
  The effects of Final State Interactions(FSI), Colour Reconnection(CR) and
Bose--Einstein Correlations(BEC) at small relative momenta of particles are
discussed. The short review of the LEP results on BEC at Z-peak, on BEC between
particles from different Ws in $e^+e^-\to W^+W^-$ events, and the W-mass
systematics due to BEC is given


title: An MT-Style Optical Package for Optical Data Transmission

abstract:
  An optical package for mounting VCSEL and PIN diodes for transmitting and
receiving optical signals has been developed. The diodes couple to the fibers
in a commercial MT connector. The package is quite compact with its physical
size significantly smaller than that of the MT connector. This design
simplifies the testing and assembly of the optical components because the MT
connector with the long fibers attached can be remounted with ease while
preserving good light coupling efficiency.


title:
Measurement of the Branching Fraction and CP-violating Asymmetries in
  Neutral B Decays to D*+-D-+

abstract:
  We present measurements of the branching fraction and CP-violating
asymmetries for neutral B decays to D*+-D-+. The measurement uses a data sample
of approximately 88 million Y(4S) --> B Bbar decays collected with the BABAR
detector at the SLAC PEP-II asymmetric-energy B factory. We measure the
branching fraction to be (8.8 +- 1.0 +- 1.3) x 10^-4 and the time-integrated
CP-violating asymmetry between the rates to D*+D- and D*-D+ to be A = -0.03 +-
0.11 +- 0.05. We also measure the time-dependent CP-violating asymmetry
parameters to be S-+ = -0.24 +- 0.69 +- 0.12, C-+ = -0.22 +- 0.37 +- 0.10 for B
--> D*-D+ and S+- = -0.82 +- 0.75 +- 0.14$, C+- = -0.47 +- 0.40 +- 0.12 for B
--> D*+D-. In each case the first error is statistical and the second error is
systematic.


title: Search for Lepton Flavor Violation Process J/$\psi \to e\mu$

abstract:
  Using a sample of 5.8X10E7 J/$\psi$ events, the Beijing Spectrometer
experiment has searched for the decay J/$\psi \to e\mu$. Four candidates,
consistent with the estimated background, are observed, and an upper limit on
the branching fraction of J/$\psi \to e\mu$ of 1.1X10E-6 at the 90% C.L. is
obtained.


title:
Observation of a near-threshold enhancement in th p pbar mass spectrum
  from radiative J/psi-->gamma p pbar decays

abstract:
  We observe a narrow enhancement near 2mp in the invariant mass spectrum of
ppbar pairs from radiative J/psi-->gamma ppbar decays. The enhancement can be
fit with either an S- or P-wave Breit Wigner fuction. In the case of the S-wave
fit, the peak mass is below the 2mp threshold and the full width is less than
30 MeV. These mass and width values are not consistent with the properties of
any known meson resonance.


title: Simulations of muon-induced neutron flux at large depths underground

abstract:
  The production of neutrons by cosmic-ray muons at large depths underground is
discussed. The most recent versions of the muon propagation code MUSIC, and
particle transport code FLUKA are used to evaluate muon and neutron fluxes. The
results of simulations are compared with experimental data.


title:
Correlated Fluctuations between Luminescence and Ionization in Liquid
  Xenon

abstract:
  The ionization of liquefied noble gases by radiation is known to be
accompanied by fluctuations much larger than predicted by Poisson statistics.
We have studied the fluctuations of both scintillation and ionization in liquid
xenon and have measured, for the first time, a strong anti-correlation between
the two at a microscopic level, with coefficient $ -0.80 < \rho_{ep} < -0.60 $.
This provides direct experimental evidence that electron-ion recombination is
partially responsible for the anomalously large fluctuations and at the same
time allows substantial improvement of calorimetric energy resolution.


title: Study of the Charmless Inclusive B -> eta' X Decay

abstract:
  Based on a measurement of high momentum eta' production in B decays, we
determine the charmless inclusive B -> eta'X_(nc) branching fraction in the
lab-frame momentum interval 2.0<P_eta'<2.7 GeV/c. Using 9.7x10^6 BBbar pairs
collected at the Upsilon(4S) center-of-mass energy with the CLEO II and II.V
detector configurations, we find Br(B -> eta'X_(nc)) = (4.6 +- 1.1 +- 0.4 +-
0.5)x 10^(-4) in the 2.0<P_(eta')<2.7 GeV/c momentum range, where the
uncertainties are statistical, systematic, and from subtraction of background
from B decays to charm, respectively.


title: Possible Observation of Photon Speed Energy Dependence

abstract:
  Current constraints on photon velocity variability are summarized and
displayed in terms of an energy dependent vacuum refraction index. It is shown
that the energy-momentum balance of high energy Compton scattering is very
sensitive to the outgoing photon speed. A missing energy observation in HERA
Compton polarimeter data indicates that photons with 12.7 GeV energy are moving
faster than light by 5.1(1.4)mm/s. An asymmetry spectrum measured by the SLC
longitudinal polarimeter implies however an effect which is 42 times smaller,
although the interpretation of the data is less clear here.


title:
Central Pseudorapidity Gaps in Events with a Leading Antiproton at the
  Fermilab Tevatron pbar-p Collider

abstract:
  We report a measurement of the fraction of events with a large pseudorapidity
gap $\Delta\eta$ within the pseudorapidity region available to the proton
dissociation products $X$ in $\bar p+p\to \bar p+X$. For a final state $\bar p$
of fractional momentum loss $\xi_{\bar p}$ and 4-momentum transfer squared
$t_{\bar p}$ within $0.06<\xi_{\bar p}<0.09$ and $|t_{\bar p}|<1.0$ [0.2]
GeV$^2$ at $\sqrt s=1800$ [630] GeV, the fraction of events with $\Delta
\eta>3$is found to be $0.246\pm 0.001 {\rm (stat)}\pm 0.042 {\rm (syst)}$
[$0.184\pm 0.001 {\rm (stat)}\pm 0.043 {\rm (syst)}$]. Our results are compared
with gap fractions measured in minimum bias $\bar pp$ collisions and with
theoretical expectations.


title: The HERA-B Ring Imaging Cherenkov Counter

abstract:
  The HERA-B RICH uses a radiation path length of 2.8 m in C_4F_10 gas and a
large 24 square meters spherical mirror for imaging Cherenkov rings. The photon
detector consists of 2240 Hamamatsu multi-anode photomultipliers with about
27000 channels. A 2:1 reducing two-lens telescope in front of each PMT
increases the sensitive area at the expense of increased pixel size, resulting
in a contribution to the resolution which roughly matches that of dispersion.
The counter was completed in January of 1999, and its performance has been
steady and reliable over the years it has been in operation. The design
performance of the RICH was fully reached: the average number of detected
photons in the RICH for a beta=1 particle was found to be 33 with a single hit
resolution of 0.7 mrad and 1 mrad in the fine and coarse granularity regions,
respectively.


title:
Final results from DELPHI on the searches for SM and MSSM Neutral Higgs
  bosons

abstract:
  These final results from DELPHI searches for the Standard Model (SM) Higgs
boson, together with benchmark scans of the Minimal Supersymmetric Standard
Model (MSSM) neutral Higgs bosons, used data taken at centre-of-mass energies
between 200 and 209 GeV with a total integrated luminosity of 224 pb^-1. The
data from 192 to 202 GeV are reanalysed with improved b-tagging for MSSM final
states decaying to four b-quarks. The 95% confidence level lower mass bound on
the Standard Model Higgs boson is 114.1 GeV/c2. Limits are also given on the
lightest scalar and pseudo-scalar Higgs bosons of the MSSM.


title:
Development of a Geant4 Solid for Stereo Mini-jet Cells in a Cylindrical
  Drift Chamber

abstract:
  Stereo mini-jet cells will be indispensable components of a future $e^+e^-$
linear collider central tracker such as JLC-CDC. There is, however, no official
Geant4 solid available at present to describe such geometrical objects, which
had been a major obstacle for us to develop a full Geant4-based simulator with
stereo cells built in. We have thus extended Geant4 to include a new solid
({\tt TwistedTubs}), which consists of three kinds of surfaces: two end planes,
inner and outer hyperboloidal surfaces, and two so-called twisted surfaces that
make slant and twisted $\phi$-boundaries. Design philosophy and its realization
in the Geant4 framework are described together with algorithmic details. We
have implemented stereo cells with the new solid, and tested them using
geantinos and Pythia events ($e^{+}e^{-}\to ZH$ at $\sqrt{s} = 350 {\rm GeV}$).
The performance was found reasonable: the stereo cells consumed only 25% more
CPU time than ordinary axial cells.


title: Study of Backgrounds at JLC IR

abstract:
  A full simulation program based on GEANT4 has been developed to study
beam-induced backgrounds in the JLC beam delivery system. We report some
results obtained using this program.


title: Study of the decay phi --> pi+pi-pi0 with the KLOE detector

abstract:
  We present a study of the reaction e+e- --> pi+pi-pi0 at the phi peak
W=M(phi)=1019.4 MeV observed with the KLOE detector at Dafne. The reaction is
dominated by phi production and decay, e+e- --> phi --> pi+pi-pi0. From a fit
to the Dalitz plot density distribution we obtain the rho-meson parameters for
its three charge states. We also find the relative amplitudes for phi --> rhopi
and phi -> pi+pi-pi0 and the cross-section for e+e- --> omega pi0 with omega
--> pi+pi-.


title:
Full Simulation Studies of the Silicon Tracker for the Linear Collider
  Detector

abstract:
  A central tracker based on silicon microstrip sensors has been envisaged for
the e+e- linear collider experiments. A full simulation program based on GEANT4
has been developed to study performance of the tracker. We report some
preliminary results obtained using this program.


title: Study of Time-Dependent CP Asymmetry in Neutral B Decays to J/psi pi0

abstract:
  We present the first study of the time-dependent CP-violating asymmetry in B0
-> J/psi pi0 decays using e+e- annihilation data collected with the BaBar
detector at the Upsilon(4S) resonance during the years 1999-2002 at the PEP-II
asymmetric-energy B Factory at SLAC. Using approximately 88 million BBbar
pairs, our results for the coefficients of the cosine and sine terms of the CP
asymmetry are C_(J/psi pi0) = 0.38 +/- 0.41 (stat) +/- 0.09 (syst) and S_(J/psi
pi0) = 0.05 +/- 0.49 (stat) +/- 0.16 (syst).


title:
Radiation-hard ASICs for optical data transmission in the ATLAS pixel
  detector

abstract:
  We have developed two radiation-hard ASICs for optical data transmission in
the ATLAS pixel detector at the LHC at CERN: a driver chip for a Vertical
Cavity Surface Emitting Laser (VCSEL) diode for 80 Mbit/s data transmission
from the detector, and a Bi-Phase Mark decoder chip to recover the control data
and 40 MHz clock received optically by a PIN diode. We have successfully
implemented both ASICs in 0.25 um CMOS technology using enclosed layout
transistors and guard rings for increased radiation hardness. We present
results from prototype circuits and from irradiation studies with 24 GeV
protons up to 57 Mrad (1.9 x 10e15 p/cm2).


title:
Rates, Polarizations, and Asymmetries in Charmless Vector-Vector B
  Decays

abstract:
  With a sample of approximately 89 million BBbar pairs collected with the
BABAR detector, we measure branching fractions, determine the degree of
longitudinal polarization, and search for direct CP violation in the decays
B0=>phiK*0 and B+=>phiK*+. We perform a search for other charmless
vector-vector B decays involving rho and K*(892) resonances and observe the
decays B+=>rho0K*+ and B+=>rho0rho+. The branching fractions are measured to be
BR(phiK*0)=(11.1^{+1.3}_{-1.2}\pm 1.1)10^{-6},
BR(phiK*+)=(12.1^{+2.1}_{-1.9}\pm 1.5)10^{-6},
BR(rho0K*+)=(7.7^{+2.1}_{-2.0}\pm 1.4)10^{-6}, and
BR(rho0rho+)=(9.9^{+2.6}_{-2.5}\pm 2.5)10^{-6}. The longitudinal polarization
fractions are measured to be GammaL/Gamma(phiK*0)=0.65\pm 0.07\pm 0.04 and
GammaL/Gamma(phiK*+)=0.46\pm 0.12\pm 0.05. We measure the charge asymmetries:
ACP(phiK*0)=+0.04\pm 0.12\pm 0.02 and ACP(phiK*+)=+0.16\pm 0.17\pm 0.04.


title:
Neural networks technique based signal-from-background separation and
  design optimization for a W/quartz fiber calorimeter

abstract:
  We present a signal-from-background separation study based on neural networks
technique applied to a W/quartz fiber calorimeter. Performance results in terms
of signal efficiency and improvement of the signal-to-background ratio are
presented. We conclude that by using neural networks we can efficiently
separate signal from background and achieve a signal enhancement over the
background of the order of several thousands at high efficiency.


title:
Measurements of the Branching Fractions of Charged B Decays to K+ pi-
  pi+ Final States

abstract:
  We present preliminary results of searches for exclusive charged-B decays to
K+ pi- pi+ from 61.6 million BBbar pairs collected at the Upsilon(4S) resonance
with the BaBar detector at the SLAC PEP-II asymmetric B Factory. The Dalitz
plot is divided into eight regions and, using a maximum-likelihood fit, we
measure statistically significant yields in all regions. We interpret the
results as the following branching fractions averaged over charged--conjugate
states: B+ --> K*0 pi+, K*0 --> K+ pi- = (10.3 +/- 1.2 +1.0 -2.7) x 10^-6, B+
--> f0 K+, f_0 --> pi+ pi- = (9.2 +/- 1.2 +2.1 -2.6) x 10^-6, B+ --> chi_c0 K+,
chi_c0 --> pi+ pi- = (1.46 +/- 0.35 +/- 0.12) x 10^-6 and B+ --> D0bar pi+,
D0bar --> K+ pi- = (184.6 +/- 3.2 +/- 9.7) x 10^-6. The first uncertainty is
statistical and the second is systematic and includes resonance--model and
interference uncertainties. We give 90% confidence upper limits on the
branching fractions of the following channels: B+ --> rho K+ < 6.2 x 10^-6 and
B+ --> K+ pi- pi+ non-resonant < 17 x 10^-6.


title: Neutrino Superbeams and the Magic Baseline

abstract:
  We examine the sensitivity to \nu_\mu --> \nu_e of a conceptual neutrino
experiment that involves a neutrino superbeam, a Megaton-scale water Cherekov
detector, and a "magic" baseline ~7300 km. With realistic beam intensity and
exposure time, the mixing parameter sin^2 2\theta_{13} and the sign of
"atmospheric" mass-squared difference may be unambiguously probed down to sin^2
22\theta_{13} values below 10^{-3}.


title: Search for an LSP gluino at LEP with the DELPHI detector

abstract:
  In some supersymmetric models, the gluino is predicted to be light and
stable. In that case, it would hadronize to form R-hadrons. In these models,
the missing energy signature of the lightest supersymmetric particle is no
longer valid, even if R-parity is conserved. Therefore, such a gluino is not
constrained by hadron collider results, which looked for the decay gluino -> q
qbar \tilde{\chi}_1^0.
  Data collected by the DELPHI detector in 1994 at 91.2 GeV have been analysed
to search for (q qbar gluino gluino) events. No deviation from Standard Model
predictions is observed and a gluino mass between 2 and 18 GeV/c^2 is excluded
at the 95% confidence level in these models. Then, R-hadrons produced in the
squark decays were searched for in the data collected by DELPHI at the
centre-of-mass energies of 189 to 208 GeV, corresponding to an overall
integrated luminosity of 609 pb^-1. The observed number of events is in
agreement with the Standard Model predictions. Limits at 95% confidence level
are derived on the squark masses from the excluded regions in the plane
(m_\tilde{q_1},m_gluino): m_\tilde{t_1} > 90 GeV/c^2, and m_\tilde{b_1} > 96
GeV/c^2 for purely left squarks. m_\tilde{t_1} > 87 GeV/c^2, and m_\tilde{b_1}
> 82 GeV/c^2 independent of the mixing angle.


title:
Search for supersymmetric particles in light gravitino scenarios and
  sleptons NLSP

abstract:
  A search for sleptons, neutralinos, charginos, sgoldstinos and heavy stable
charged sleptons in the context of scenarios where the lightest supersymmetric
particle is the gravitino, is presented. Data collected during 2000 with the
DELPHI detector at centre-of-mass energies from 204 to 208 GeV were analysed
and combined with all the data collected from 1995 to 1999 at lower energies.
No evidence for the production of sleptons, neutralinos and charginos has been
found, therefore new limits on the mass of these supersymmetric particles and
on the model parameter space are set. The search for heavy stable charged
sleptons also updates the stable sleptons mass limit. The absence of evidence
for sgoldstino production allows limits to be set on its mass and on the scale
of supersymmetry breaking.


title: Search for Doubly Charged Higgs Bosons at LEP2

abstract:
  A search for pair-produced doubly charged Higgs bosons has been performed
using the data collected by the DELPHI detector at LEP at centre-of-mass
energies between 189 and 209 GeV. No excess is observed in the data with
respect to the Standard Model background. A lower limit for the mass of 97.3
GeV/c^2 at the 95% confidence level has been set for doubly charged Higgs
bosons in left-right symmetric models for any value of the Yukawa coupling
between the Higgs bosons and the tau leptons.


title:
Asymmetries in the Production of Lambda0 in 250 GeV/c pi+-, K+- and p --
  Nucleon Interactions

abstract:
  Using data from Fermilab fixed-target experiment E769, we have measured
particle-antiparticle production asymmetries for Lambda0 hyperons in 250 GeV/c
pi+-, K+- and p -- nucleon interactions. The asymmetries are measured as
functions of Feynman-x (x_F) and p_t^2 over the ranges -0.12<=x_F<=0.12 and
0<=p_t^2<=3 (GeV/c)^2 (for positive beam) and -0.12<=x_F<=0.4 and 0<=p_t^2<=10
(GeV/c)^2 (for negative beam). We find substantial asymmetries, even at x_F
around zero. We also observe leading-particle-type asymmetries. These latter
effects are qualitatively as expected from valence-quark content of the target
and variety of projectiles studied.


title:
Observation of the Decay $B^{\pm} \to \pi^{\pm}\pi^{0}$, Study of
  $B^{\pm} \to K^{\pm}\pi^{0}$, and Search for $B^{0} \to \pi^{0}\pi^{0}$

abstract:
  We present results for the branching fractions and charge asymmetries in
$B^{\pm} \to h^{\pm} \pi^{0}$ (where $h^{\pm} = \pi^{\pm}, K^{\pm}$) and a
search for the decay $B^{0} \to \pi^{0} \pi^{0}$ using a sample of
approximately 88 million $B\bar{B}$ pairs collected by the BABAR detector at
the PEP-II asymmetric-energy $B$ Factory at SLAC. We measure ${\cal B} (B^{\pm}
\to \pi^{\pm} \pi^{0}) = (5.5 ^{+1.0}_{-0.9} \pm 0.6) \times 10^{-6}$, where
the first error is statistical and the second is systematic. The $B^{\pm} \to
\pi^{\pm} \pi^{0}$ signal has a significance of $7.7 \sigma$ including
systematic uncertainties. We simultaneously measure the $K^{\pm}\pi^{0}$
branching fraction to be $ {\cal B} (B^{\pm} \to K^{\pm} \pi^{0}) = (12.8
^{+1.2}_{-1.1} \pm 1.0) \times 10^{-6}$. The charge asymmetries are ${\cal
A}_{\pi^{\pm}\pi^{0}} = -0.03_{-0.17}^{+0.18} \pm 0.02$ and ${\cal
A}_{K^{\pm}\pi^{0}} = -0.09 \pm 0.09 \pm 0.01$. We place a 90% confidence-level
upper limit on the branching fraction ${\cal B} (B^{0} \to \pi^{0} \pi^{0})$ of
$3.6 \times 10^{-6} $.


title:
Branching Fractions in B -> phi h and Search for Direct CP Violation in
  B+- -> phi K+-

abstract:
  We present preliminary measurements of branching fractions of the b ->
s\bar{s}s penguin-dominated decays B+ -> phi K+ and B0 -> phi K0 in a sample of
approximately 89 million BBbar pairs collected by the BaBar detector at the
PEP-II asymmetric-energy B-meson Factory at SLAC. We determine BF(B+ -> phi K+)
= (10.0^{+0.9}_{-0.8} (stat.) \pm 0.5 (syst.)) * 10^{-6} and BF(B^0 -> phi K0)
= (7.6^{+1.3}_{-1.2} (stat.) \pm 0.5 (syst.)) * 10^{-6}. Additionally, we
measure the charge asymmetry A_{CP}(B+ -> phi K+) = 0.039 \pm 0.086 (stat.) \pm
0.011 (syst.) and set an upper limit on the CKM- and color-suppressed decay B+
-> phi pi+, BF(B+ -> phi pi+) < 0.41 * 10^{-6} (90% CL).


title:
Impact of tag-side interference on time-dependent CP asymmetry
  measurements using coherent B0 B0bar pairs

abstract:
  Interference between CKM-favored b --> c ubar d and doubly-CKM-suppressed
bbar --> ubar c dbar amplitudes in final states used for B flavor tagging gives
deviations from the standard time evolution assumed in CP-violation
measurements at B factories producing coherent B0 B0bar pairs. We evaluate
these deviations for the standard time-dependent CP-violation measurements, the
uncertainties they introduce in the measured quantities, and give suggestions
for minimizing them. The uncertainty in the measured CP asymmetry for CP
eigenstates is ~2% or less. The time-dependent analysis of D*pi, proposed for
measuring sin(2 beta + gamma), must incorporate possible tag- side
interference, which could produce asymmetries as large signal asymmetry.


title: Inclusive b Decays to Wrong Sign Charmed Mesons

abstract:
  The production of wrong sign charmed mesons b -> \bar D_{(s)} X,
D_{(s)}=(D0,D+,D_s), is studied using the data collected by the DELPHI
experiment in the years 1994 and 1995. Charmed mesons in Z -> b bbar events are
exclusively reconstructed by searching for the decays D0 -> K- pi+, D+ -> K-
pi+ pi+ and D_s^+ -> phi pi+ -> K+ K- pi+. The wrong sign contribution is
extracted by using two discriminant variables: the charge of the b-quark at
decay time, estimated from the charges of identified particles, and the
momentum of the charmed meson in the rest frame of the b-hadron. The inclusive
branching fractions of b-hadrons into wrong sign charm mesons are measured to
be:
  Br(b -> \bar D0 X) + Br(b -> D- X) = (9.3 +/- 1.7(stat) +/- 1.3(syst) +/-
0.4(Br))%,
  Br(b -> D_s^- X) = (10.1 +/- 1.0(stat) +/- 0.6(syst) +/- 2.8(Br))% where the
first error is statistical, the second and third errors are systematic.


title:
Search for B0_s - anti-B0_s oscillations and a measurement of B0_d -
  anti-B0_d oscillations using events with an inclusively reconstructed vertex

abstract:
  Neutral B meson oscillations in the B0_s - anti-B0_s and B0_d - anti-B0_d
systems were studied using a sample of about 4.0 million hadronic Z decays
recorded by the DELPHI detector between 1992 and 2000. Events with a high
transverse momentum lepton were removed and a sample of 770 k events with an
inclusively reconstructed vertex was selected. The mass difference between the
two physical states in the B0_d - anti-B0_d system was measured to be:
  \Delta m_d = (0.531 +/- 0.025 (stat.) +/- 0.007 (syst.)) ps^{-1}.
  The following limit on the width difference of these states was also
obtained:
  |\Delta\Gamma_{B_d}| / \Gamma_{B_d} < 0.18 at 95% CL.
  As no evidence for B0_s - anti-B0_s oscillations was found, a limit on the
mass difference of the two physical states was given:
  \Delta m_s > 5.0 ps^{-1} at 95% CL.
  The corresponding sensitivity of this analysis is equal to 6.6 ps^{-1}.


title: Search for resonant sneutrino production at sqrt(s) = 183 to 208 GeV

abstract:
  Searches for resonant sneutrino production in e+e- collisions under the
assumption that R-parity is not conserved and that the dominant R-parity
violating coupling is lambda_{121} or lambda_{131} used data recorded by DELPHI
in 1997 to 2000 at centre-of-mass energies of 183 to 208 GeV. No deviation from
the Standard Model was observed. Upper limits are given for the lambda_{121}
and lambda_{131} couplings as a function of the sneutrino mass and total width.
The limits are especially stringent for sneutrino masses equal to the
centre-of-mass energies with the highest integrated luminosities recorded.


title: A Search for B+ --> tau+ nu Recoiling Against B- --> D0 l- nu X

abstract:
  We present a search for the decay $B^{+} \to \tau^{+} \nu_{\tau}$ in $88.9
\times 10^{6}$ $\Upsilon(4S)$ decays recorded with the BABAR detector at the
SLAC $B$-Factory. A sample of semi-exclusive, semi-leptonic B decays ($B^{-}
\to D^{0} \ell^{-} \bar{\nu_{\ell}}X$), where $X$ is either a photon,
$\pi^{0}$, or nothing, is used to identify the daughter particles that are
associated with the other $B$ meson in each event. These particles are searched
for evidence of a one-prong leptonic $B^{+} \to \tau^{+} \nu_{\tau}$ decay. For
this data sample we set a preliminary upper limit on the branching fraction of
$\mathcal{B}(B^{+} \to \tau^{+} \nu_{\tau}) < 4.9 \times 10^{-4}$ at the 90%
confidence level. This result is then combined with a statistically independent
BABAR search for $B^{+} \to \tau^{+} \nu_{\tau}$ to give a combined preliminary
limit of $\mathcal{B}(B^{+} \to \tau^{+} \nu_{\tau}) < 4.1 \times 10^{-4}$.


title: Test of non-commutative QED in the process e+e- -> gamma gamma at LEP

abstract:
  Non-commutative QED would lead to deviations from the Standard Model
depending on a new energy scale Lambda_NC and a unique direction in space
defined by two angles eta and xi. Here in this analysis eta is defined as the
angle between the unique direction and the rotation axis of the earth. The
predictions of such a theory for the process e+e- -> gamma gamma are evaluated
for the specific orientation of the OPAL detector and compared to the
measurements. Distributions of the polar and azimuthal scattering angles are
used to extract limits on the energy scale Lambda_NC depending on the model
parameter eta. At the 95% confidence level Lambda_NC is found to be larger than
141 GeV for all eta and xi. It is shown that the time dependence of the total
cross-section could be used to determine the model parameter xi if there were a
detectable signal. These are the first limits obtained on non-commutative QED
from an e+e- collider experiment.


title: Evidence for B+ --> Jpsi p Lambda-bar and Search for B0 --> Jpsi p p-bar

abstract:
  We have performed a search for the decays $B^+\to J/\psi p \bar{\Lambda}$ and
$B^0\to J/psi p \bar{p}$ in a data set of $(88.9 \pm 1.0)\times 10^6$
$\Upsilon(4S)$ decays collected by the BaBar experiment at the PEP-II $\e^+e^-$
storage ring at the Stanford Linear Accelerator Center. Four charged $B$
candidates have been observed with an expected background of $0.21\pm 0.14$
events. The corresponding branching fraction is $12^{+9}_{-6}\times 10^{-6}$,
where statistical and systematic uncertainties have been combined. The result
can be interpreted as a 90% confidence level (CL) upper limit of $26 \times
10^{-6}$. We also find one $B^0$ candidate, with an expected background of
$0.64\pm 0.17$ events, implying a 90% CL upper limit of $1.9 \times 10^{-6}$.


title: Direct CP violation in neutral kaon decays

abstract:
  The final result is presented of the NA48 Experiment performed at CERN SPS
neutral kaon beams on the direct CP violation parameter Re(epsilon'/epsilon),
as maesured from the decay rates of neutral kaons into two pions. The data
collected in years 1997-2001 yield the evidence for direct CP violation with
Re(epsilon'/epsilon)=(14.7+-2.2)10^-4. Description of expermental method and
systematics, comparison with world data and some discussion of implications for
theory are given.


title: Tests of a proximity focusing RICH with aerogel as radiator

abstract:
  Using aerogel as radiator and multianode PMTs for photon detection, a
proximity focusing Cherenkov ring imaging detector has been constructed and
tested in the KEK $\pi$2 beam. The aim is to experimentally study the basic
parameters such as resolution of the single photon Cherenkov angle and number
of detected photons per ring. The resolution obtained is well approximated by
estimates of contributions from pixel size and emission point uncertainty. The
number of detected photons per Cherenkov ring is in good agreement with
estimates based on aerogel and detector characteristics. The values obtained
turn out to be rather low, mainly due to Rayleigh scattering and to the
relatively large dead space between the photocathodes. A light collection
system or a higher fraction of the photomultiplier active area, together with
better quality aerogels are expected to improve the situation. The reduction of
Cherenkov yield, for charged particle impact in the vicinity of the aerogel
tile side wall, has also been measured.


title: Observation of B Meson Decays to eta pi and eta K

abstract:
  We present preliminary measurements of the B meson decays B+->etapi+,
B+->etaK+, and B0->etaK0. The data were recorded with the BABAR detector at PEP
II and correspond to 88.9 million BBbar pairs produced in e+e- annihilation
through the Upsilon(4S) resonance. We find the branching fractions
B(B+->etapi+) = (4.2 +1.0-0.9 +/- 0.3)x 10^-6 and B(B+->etaK+) = (2.8 +0.8-0.7
+/-0.2)x10^-6. We set a 90% CL upper limit of B(B0->etaK0) < 4.6x10^-6. The
time-integrated charge asymmetries are Ach(B+->etapi+) = -0.51 +0.20-0.18
+/-0.01 and Ach(B+->etaK+) = -0.32 +0.22-0.18 +/-0.01.


title: Observation of B Meson Decays to omegapi+, omegaK+, and omegaK0

abstract:
  We present preliminary measurements of B meson decays to omegapi+, omegaK+,
and omegaK0. The data were recorded with the BABAR detector and correspond to
88.9x10^6 BBbar pairs produced in e+e- annihilation at the Upsilon(4S)
resonance. We find statistically significant signals for all three channels:
B(B->omegapi+)=(5.4+/-1.0+/-0.5)x10^-6, B(B->omegaK+)=(5.0+/-1.0+/-0.4)x10^-6,
and B(B->omegaK0)=(5.3^+1.4_-1.2+/-0.5)x10^-6. We also measure time-integrated
charge asymmetries A_ch(omegapi+)=0.04+/-0.17+/-0.01 and
A_ch(omegaK+)=-0.05+/-0.16+/-0.01.


title: Study of the e+e- -> Ze+e- process at LEP

abstract:
  The cross section of the process e+e- -> Ze+e is measured with 0.7fb^-1 of
data collected with the L3 detector at LEP. Decays of the Z boson into quarks
and muons are considered at centre-of-mass energies ranging from 183GeV up to
209GeV. The measurements are found to agree with Standard Model predictions,
achieving a precision of about 10% for the hadronic channel.


title:
Search for Colour Reconnection Effects in e+e- -> W+W- -> hadrons
  through Particle-Flow Studies at LEP

abstract:
  A search for colour reconnection effects in hadronic decays of W pairs is
performed with the L3 detector at centre-of-mass energies between 189 and 209
GeV. The analysis is based on the study of the particle flow between jets
associated to the same W boson and between two different W bosons in qqqq
events. The ratio of particle yields in the different interjet regions is found
to be sensitive to colour reconnection effects implemented in some
hadronisation models. The data are compared to different models with and
without such effects. An extreme scenario of colour reconnection is ruled out.


title:
Limits on the Lifetime Difference of Neutral B Mesons and on CP, T, and
  CPT Violation in B0-B0bar Mixing

abstract:
  Using events in which one of two neutral B mesons from the decay of an Y(4S)
resonance is fully reconstructed, we set limits on the lifetime difference
between the two neutral-B mass eigenstates and on CP, T, and CPT violation in
B0-B0bar mixing. Both CP and non-CP eigenstates were obtained from the 88
million Y(4S)->B0B0bar decays collected between 1999 and 2002 with the BABAR
detector at the PEP-II asymmetric-energy B-Factory at SLAC. We determine six
independent parameters governing mixing (dm, dGamma/Gamma), CPT/CP violation
(Re(z), Im(z)), and CP/T violation (Im\lambda(CP), |q/p|), where \lambda(CP)
characterizes B0 and B0bar decays to states of charmonium plus K_S or K_L. The
preliminary results are: sgn(Re\lambda(CP))*dGamma/Gamma =
-0.008+-0.037(stat)+-0.018(syst) [-0.084,0.068], |q/p| =
1.029+-0.013(stat)+-0.011(syst) [1.001,1.057],
(Re\lambda(CP)/|\lambda(CP)|)*Rez = 0.014+-0.035(stat)+-0.034(syst)
[-0.072,0.101], Imz = 0.038+-0.029(stat)+-0.025(syst) [-0.028,0.104] . The
values inside square brackets indicate the 90% confidence-level intervals. For
Im\lambda(CP)/|\lambda(CP)| and dm we find values consistent with recent
results from other analyses. These results are consistent with Standard Model
expectations.


title:
Femtosecond Transversal Deflection of Electron Beams with the Help of
  Laser Beams and Its Possible Applications

abstract:
  It is shown that the interaction of an electron beam with polarized
electromagnetic wave of laser photons propagating in the same direction in a
short interaction region results in significant transversal deflection of the
electrons which can be used for production of femtosecond electron and
synchrotron radiation beams, for chopping the electron beams and construction
of laser oscilloscopes measuring femtosecond processes.


title:
Neutrino Properties Studied with a Triton Source Using Large TPC
  Detectors

abstract:
  The purpose of the present paper is to study the neutrino properties as they
may appear in the low energy neutrinos emitted in triton decay, with maximum
neutrino energy of 18.6 KeV. The technical challenges to this end can be
summarized as building a very large TPC capable of detecting low energy
recoils, down to a few 100 eV, within the required low background constraints.
More specifically We propose the development of a spherical gaseous TPC of
about 10-m in radius and a 200 Mcurie triton source in the center of curvature.
One can list a number of exciting studies, concerning fundamental physics
issues, that could be made using a large volume TPC and low energy
antineutrinos:1) The oscillation length involving the small mixing angle in the
electronic neutrino disappearancei experiment is comparable to the length of
the detector. Measuring the counting rate of neutrino-electron elastic
scattering will give a precise measurement of the oscillation parameters free
of systematic errors. First estimations show that a sensitivity of a few
percent for the measurement of the above angle. 2) The low energy detection
threshold offers a unique sensitivity for the neutrino magnetic moment which is
about two orders of magnitude beyond the current experimental limit. 3)
Scattering at such low neutrino energies has never been studied and any
departure from the expected behavior may be an indication of new physics beyond
the standard model. We present results of theoretical calculation and studies
of possible measurements.


title:
Measurements of CP-violating Asymmetries and Branching Fractions in B
  Meson Decays to eta' K

abstract:
  We present measurements of the branching fractions of the decays B+ -> eta'
K+ and B0 -> eta' K0. For B0 -> eta' K0s we also measure the time dependent
CP-violation parameters S and C, and for B+ ->eta' K+ the time-integrated
charge asymmetry Ach. The data sample corresponds to 88.9 million BBbar pairs
produced by e+e- annihilation at the Upsillon(4S). The results are
B(B+->eta'K+) = (76.9 +/- 3.5 +/- 4.4)*10^-6, B(B0->eta'K0) = (60.6 +/- 5.6 +/-
4.6)*10^-6, S = 0.02+/-0.34 +/- 0.03, C = 0.10+/-0.22 +/- 0.04, and Ach = 0.037
+/- 0.045+/- 0.011.


title: Evidence of $\kappa$ particle in $J/\psi \to \bar{K}^*(892)^0 K^+ \pi^-$

abstract:
  Based on a $J/\psi$ data sample of $7.8 \times 10^6$ events at BESI, the
decay of $ J/\psi \to \bar{K}^*(892)^0 K^+ \pi^-$ is studied and a low mass
enhancement, which is believed not coming from the phase space effect or
background, is visible in the $K^+ \pi^-$ invariant mass spectrum recoiling
against $\bar{K}^*(892)^0$. Partial wave analysis of this channel favors this
low mass enhancement being a broad $0^{+}$ resonance with the mass and width of
$771^{+164}_{-221}\pm 55$ MeV/c$^2$ and $220^{+225}_{-169} \pm 97$ MeV/c$^2$,
respectively.


title:
A Study of the \eta \pi^{0} Spectrum and Search for a J^{PC} = 1^{-+}
  Exotic Meson

abstract:
  A partial wave analysis (PWA) of the of the $\eta \pi ^0$ system (where $\eta
\to \gamma \gamma$) produced in the charge exchange reaction $\pi ^-p\to \eta
\pi ^0n$ at an incident momentum of 18 GeV$/c$ is presented as a function of
${\eta \pi ^0}$ invariant mass, $m_{\eta\pi^0}$, and momentum transfer squared,
$t_{\pi^{-}\to\eta\pi}$, from the incident $\pi^-$ to the outgoing ${\eta\pi
^0}$ system. $S$, $P$ and $D$ waves were included in the PWA. The $a_0(980)$
and $a_2(1320)$ states are clearly observed in the overall ${\eta\pi ^0}$
effective mass distribution as well as in the amplitudes associated with $S$
wave and $D$ waves respectively after partial wave decomposition. The observed
distributions in moments (averages of spherical harmonics) were compared to the
results from the PWA and the two are consistent. The distribution in
$t_{\pi^{-}\to\eta\pi}$ for individual $D$ waves associated with natural and
unnatural parity exchange in the $t$-channel are consistent with Regge
phenomenology. Of particular interest in this study is the $P$ wave since this
leads to an exotic $J^{PC}=1^{-+}$ for the $\eta \pi$ system. A $P$ wave is
present in the data, however attempts to describe the mass dependence of the
amplitude and phase motion with respect to the $D$ wave as a Breit-Wigner
resonance are problematic. This has implications regarding the existence of a
reported exotic $J^{PC} = 1^{-+}$ meson decaying into $\eta \pi^0$ with a mass
near 1.4 GeV$/c^2$.


title:
Measurement and QCD Analysis of Neutral and Charged Current Cross
  Sections at HERA

abstract:
  The inclusive e^+ p single and double differential cross sections for neutral
and charged current processes are measured with the H1 detector at HERA. The
data were taken in 1999 and 2000 at a centre-of-mass energy of \sqrt{s} = 319
GeV and correspond to an integrated luminosity of 65.2 pb^-1. The cross
sections are measured in the range of four-momentum transfer squared Q^2
between 100 and 30000 GeV^2 and Bjorken x between 0.0013 and 0.65. The neutral
current analysis for the new e^+ p data and the earlier e^- p data taken in
1998 and 1999 is extended to small energies of the scattered electron and
therefore to higher values of inelasticity y, allowing a determination of the
longitudinal structure function F_L at high Q^2 (110 - 700 GeV^2). A new
measurement of the structure function x F_3 is obtained using the new e^+ p and
previously published e^\pm p neutral current cross section data at high Q^2.
These data together with H1 low Q^2 precision data are further used to perform
new next-to-leading order QCD analyses in the framework of the Standard Model
to extract flavour separated parton distributions in the proton.


title: Beamstrahlung at the NLC

abstract:
  The detection of beamstrahlung visible light, divided in its polarization
components, effectively images the beam-beam collision (BBC). Monitoring and
correction of drifts are reviewed. Monitoring of beam jitter is also possible.
The properties of coherent beamstrahlung in the microwave part of the spectrum
(and its usage) are introduced.


title: Prospects for Higgs Search at D0

abstract: The status of the Higgs search at the upgraded D0 detector is discussed.


title:
Measurements of the Branching Fractions and Bounds on the Charge
  Asymmetries of Charmless Three-Body Charged B Decays

abstract:
  We present measurements of branching fractions and charge asymmetries for
charmless B-meson decays to three-body final states of charged pions and kaons.
The analysis uses 81.8 fb^-1 of data collected at the Upsilon(4S) resonance
with the BaBar detector at the SLAC PEP-II asymmetric B Factory. We measure the
branching fractions B(B+ -> pi+ pi- pi+) = (10.9 +/- 3.3 +/- 1.6) x 10^-6, B(B+
-> K+ pi- pi+) = (59.1 +/- 3.8 +/- 3.2) x 10^-6, and B(B+ -> K+ K- K+) = (29.6
+/- 2.1 +/- 1.6) x 10^-6, and provide 90% C.L. upper limits for other decays.
We observe no charge asymmetries for these modes.


title:
Search for D0D0bar Mixing and a Measurement of the Doubly
  Cabibbo-suppressed Decay Rate in D0 -> K pi Decays

abstract:
  We present results of a search for $D^0$-$\kern 0.2em\bar{\kern -0.2em
D}{}^0$~mixing and a measurement of $R_{\rm D}$, the ratio of doubly
Cabibbo-suppressed decays to Cabibbo-favored decays, based on an analysis of
$D^0 \to K^{+}\pi^{-}$ decays in 57.1~${fb}^{-1}$ of data collected at or just
below the $\Upsilon{(4S)}$ resonance with the {\slshape BABAR} detector at the
PEP-II collider. Our results are compatible with no mixing and no $CP$
violation. At the 95% C.L., allowing for CP violation, we find the mixing
parameters ${x^{\prime}}^2<0.0022$ and $-0.056<y^{\prime}<0.039$, and the
mixing rate $R_{\rm M} < 0.16%$. In the limit of no mixing, $R_{\rm D} = (0.357
\pm 0.022 \hbox{(stat.)} \pm 0.027 \hbox{(syst.)})%$ and the $CP$~violating
asymmetry \mbox{$A_{\rm D} = 0.095 \pm 0.061 \hbox{(stat.)} \pm 0.083
\hbox{(syst.)}$.}


title:
A search for resonance decays to lepton+jet at HERA and limits on
  leptoquarks

abstract:
  A search for narrow-width resonances that decay into electron+jet or
neutrino+jet has been performed with the ZEUS detector at HERA operating at
center-of-mass energies of 300 and 318 GeV. An integrated e+p luminosity of
114.8 pb-1 and e-p luminosity of 16.7 pb-1 were used. No evidence for any
resonance was found. Limits were derived on the Yukawa coupling as a function
of the mass of a hypothetical resonance that has arbitrary decay branching
ratios into electron+quark or neutrino+quark. These limits also apply to
squarks predicted by R-parity-violating supersymmetry. Limits for the
production of leptoquarks described by the Buchmuller-Ruckl-Wyler model were
also derived for masses up to 400 GeV. For Yukawa coupling of 0.1, leptoquark
masses up to 290 GeV are excluded.


title:
Study of the Process e+ e- --> omega pi0 --> pi0 pi0 gamma in c.m.
  Energy Range 920--1380 MeV at CMD-2

abstract:
  The cross section of the process e+ e- --> omega pi0 --> pi0 pi0 gamma has
been measured in the c.m. energy range 920-1380 MeV with the CMD-2 detector.
Its energy dependence is well described by the interference of the rho(770) and
rho'(1450) mesons decaying to omega pi0. Upper limits for the cross sections of
the direct processes e+ e- --> pi0 pi0 gamma, eta pi0 gamma have been set.


title:
On the application of 'photon+jet' process for setting the absolute
  scale of jet energy and determining the gluon distribution at the Tevatron in
  Run II

abstract:
  The consequences of application of new set of criteria, proposed in our
previous works, for the improvement of a jet energy calibration accuracy with
the process "p~p->photon+jet+X" at Tevatron and for a reduction of background
events contribution are studied. The efficiencies of the used selection
criteria are estimated. The distributions of these events over photon Pt and
jet pseudorapidity are presented. The features of "photon+jet" events in the
central calorimeter region of the D0 detector (|\eta|<0.7) are investigated. It
is also shown that the samples of "photon+jet" events, selected with the cuts
used for the jet energy calibration, may have the statistics sufficient for
determining the gluon distribution function of a proton in the region of
2*10^{-3}< x < 1.0 and the values of Q^2 by one order higher than that reached
in the experiments at HERA. Monte Carlo events produced by the PYTHIA 5.7
generator are used for this aim.


title: Limits on the neutrino magnetic moment from the MUNU experiment

abstract:
  The MUNU experiment was carried out at the Bugey nuclear power reactor. The
aim was the study of electron antineutrino-electron elastic scattering at low
energy. The recoil electrons were recorded in a gas time projection chamber,
immersed in a tank filled with liquid scintillator serving as veto detector,
suppressing in particular Compton electrons. The measured electron recoil
spectrum is presented. Upper limits on the neutrino magnetic moment were
derived and are discussed.


title: First Evidence of Lambda Lambda-bar in \chi_cJ Decays

abstract:
  The first observation of \chi_cJ (J=0,1,2) decays to Lambda Lambda-bar is
reported using \psi(2S) data collected with the BESII detector at the BEPC. The
branching ratios are determined to be BR(\chi_c0 \to Lambda Lambda-bar) =
(4.7^{+1.3}_{-1.2} \pm 1.0)\times 10^{-4}, BR(\chi_c1 \to Lambda Lambda-bar) =
(2.6^{+1.0}_{-0.9} \pm 0.6)\times 10^{-4} and BR(\chi_c2 \to Lambda Lambda-bar)
= (3.3^{+1.5}_{-1.3} \pm 0.7)\times 10^{-4}. Results are compared with model
predictions.


title: A First Mass Production of Gas Electron Multipliers

abstract:
  We report on the manufacture of a first batch of approximately 2,000 Gas
Electron Multipliers (GEMs) using 3M's fully automated roll to roll flexible
circuit production line. This process allows low-cost, reproducible fabrication
of a high volume of GEMs of dimensions up to 30$\times$30 cm$^{2}$. First tests
indicate that the resulting GEMs have optimal properties as radiation
detectors. Production techniques and preliminary measurements of GEM
performance are described. This now demonstrated industrial capability should
help further establish the prominence of micropattern gas detectors in
accelerator based and non-accelerator particle physics, imaging and
photodetection.

categories: hep-ex astro-ph nucl-ex physics.acc-ph physics.ins-det


title:
Rare B Decays into States Containing a J/psi Meson and a Meson with
  ssbar Quark Content

abstract:
  We report a study of the B meson decays, B+ -> J/psi phi K+, B0 -> J/psi phi
K0S, B0 -> J/psi phi, B0 -> J/psi eta and B0 -> J/psi eta' using 56 million
BBbar events collected at the Y(4S) resonance with the BABAR detector at the
PEP-II e+ e- asymmetric-energy storage ring. We measure the branching fractions
B(B+ -> J/psi phi K+) = (4.4 +- 1.4(stat) +- 0.5(syst)) * 10-5 and B(B0 ->
J/psi phi K0S) = (5.1 +- 1.9(stat) +- 0.5(syst)) * 10^-5, and set upper limits
at 90% confidence level for the branching fractions B(B0 -> J/psi phi) < 9.2 *
10^-6, B(B0 -> J/psi eta)< 2.7 * 10^-5, and B(B0 -> J/psi eta')< 6.3 * 10-5.


title:
Search for B->pbar e nuebar X Decay using a Partial Reconstruction
  Method

abstract:
  Using data collected on the Upsilon(4S) resonance and the nearby continuum by
the CLEO detector at the Cornell Electron Storage Ring, we have searched for
the semileptonic decay of B mesons to electron-antiproton inclusive final
states. We obtain an upper limit of B(B-> pbar e nuebar X)<5.9e-4. For the b->u
decay, we find an upper limit of B(B^- -> p pbar e nuebar)< 5.2e-3. All upper
limits are measured at the 90% confidence level.


title: Horizontal Muons and a Search for AGN Neutrinos in Soudan 2

abstract:
  We measure the horizontal ($|\cos(\theta_z)|<0.14$) neutrino-induced muon
flux in Soudan 2 to be $4.01\pm 0.50\pm 0.30\times 10^{-13}
$cm$^{-2}$sr$^{-1}$s$^{-1}$. From the absence of horizontal muons with large
energy loss, we set a limit on the flux of muon neutrinos from Active Galactic
Nuclei.


title: Detector R&D for future Neutrino Experiments with the NuMI Beamline

abstract:
  A report to the Fermilab Director from the Study Group on Future Neutrino
Experiments at Fermilab


title: CNGS beam monitor with the LVD detector

abstract:
  The importance of an adequate CNGS beam monitor at the Gran Sasso Laboratory
has been stressed in many papers. Since the number of internal $\nu_\mu$ CC and
NC interactions in the various detectors will not allow to collect statistics
rapidly, one should also be able to detect the $\nu_\mu$ CC interactions in the
upstream rock. In this study we have investigated the performances of the LVD
detector as a monitor for the CNGS neutrino beam. Thanks to its wide area ($13
\times 11 m^2$ orthogonal to the beam direction) LVD can detect about 120 muons
per day originated by $\nu_\mu$ CC interactions in the rock. The LVD total mass
is $\sim2 kt$. This allows to get 30 more CNGS events per day as internal $(NC
+ CC)$ $\nu_\mu$ interactions, for a total of $\sim 150$ events per day. A 3%
statistical error can be reached in 7 days. Taking into account the time
characteristics of the CNGS beam, the cosmic muon background can be reduced to
a negligible level, of the order of 1.5 events per day.


title:
Study of the q^2-Dependence of B --> pi ell nu and B --> rho(omega)ell
  nu Decay and Extraction of |V_ub|

abstract:
  We report on determinations of |Vub| resulting from studies of the branching
fraction and q^2 distributions in exclusive semileptonic B decays that proceed
via the b->u transition. Our data set consists of the 9.7x10^6 BBbar meson
pairs collected at the Y(4S) resonance with the CLEO II detector. We measure
B(B0 -> pi- l+ nu) = (1.33 +- 0.18 +- 0.11 +- 0.01 +- 0.07)x10^{-4} and B(B0 ->
rho- l+ nu) = (2.17 +- 0.34 +0.47/-0.54 +- 0.41 +- 0.01)x10^{-4}, where the
errors are statistical, experimental systematic, systematic due to residual
form-factor uncertainties in the signal, and systematic due to residual
form-factor uncertainties in the cross-feed modes, respectively. We also find
B(B+ -> eta l+ nu) = (0.84 +- 0.31 +- 0.16 +- 0.09)x10^{-4}, consistent with
what is expected from the B -> pi l nu mode and quark model symmetries. We
extract |Vub| using Light-Cone Sum Rules (LCSR) for 0<= q^2<16 GeV^2 and
Lattice QCD (LQCD) for 16 GeV^2 <= q^2 < q^2_max. Combining both intervals
yields |Vub| = (3.24 +- 0.22 +- 0.13 +0.55/-0.39 +- 0.09)x10^{-3}$ for pi l nu,
and |Vub| = (3.00 +- 0.21 +0.29/-0.35 +0.49/-0.38 +-0.28)x10^{-3} for rho l nu,
where the errors are statistical, experimental systematic, theoretical, and
signal form-factor shape, respectively. Our combined value from both decay
modes is |Vub| = (3.17 +- 0.17 +0.16/-0.17 +0.53/-0.39 +-0.03)x10^{-3}.


title: A Search for the Decay $B^{-}\to K^{-} \nu \bar{\nu}$

abstract:
  We present a search for the rare flavour-changing neutral-current decay
$B^{-}\to K^{-} \nu \bar{\nu}$ based on a sample of $(86.9 \pm 1.0) \times
10^{6}$ $\Upsilon (4S) \to $B\bar{B}$ events collected by the BABAR experiment
at the SLAC B-factory. Signal candidate events are selected by fully
reconstructing a $B^+ \to \bar{D}^{0} X^+$ decay, where $X^+$ represents a
combination of up to three charged pions or kaons and up to two $\pi^0$
candidates. The charged tracks and calorimeter clusters not used in the $B^+$
reconstruction are required to be compatible with a $B^{-}\to K^{-} \nu
\bar{\nu}$ decay. We observe a total of three signal candidate events with an
expected background of $2.7 \pm 0.8$, resulting in a preliminary limit of
$\mathcal{B}(B^{-}\to K^{-} \nu \bar{\nu}) < 1.05 \times 10^{-4}$ at the 90%
confidence level. This search is combined with the results of a previous and
statistically independent preliminary BABAR search for $B^{-}\to K^{-} \nu
\bar{\nu}$ to give a limit of $\mathcal{B}(B^{-}\to K^{-} \nu \bar{\nu}) < 7.0
\times 10^{-5}$ at the 90% confidence level.


title:
Observation of a Narrow Meson Decaying to Ds+pi0 at a Mass of 2.32
  GeV/c^2

abstract:
  We have observed a narrow state near 2.32 GeV/c^2 in the inclusive Ds+ pi0
invariant mass distributionfrom e+e- annihilation data at energies near 10.6
GeV. The observed width is consistent with the experimental resolution. The
small intrinsic width and the quantum numbers of the final state indicate that
the decay violates isospin conservation. The state has natural spin-parity and
the low mass suggests a JP=0+ assignment. The data sample corresponds to an
integrated luminosity of 91 fb-1 recorded by the BABAR detector at the PEP2
asymmetric-energy e+e- storage ring.


title:
Effective Dynamic Range in Measurements with Flash Analog-to-Digital
  Convertor

abstract:
  Flash Analog to Digital Convertor (FADC) is frequently used in nuclear and
particle physics experiments, often as the major component in big multi-channel
systems. The large data volume makes the optimization of operating parameters
necessary. This article reports a study of a method to extend the dynamic range
of an 8-bit FADC from the nominal $\rm{2^8}$ value. By comparing the integrated
pulse area with that of a reference profile, good energy reconstruction and
event identification can be achieved on saturated events from CsI(Tl) crystal
scintillators. The effective dynamic range can be extended by at least 4 more
bits. The algorithm is generic and is expected to be applicable to other
detector systems with FADC readout.


title: Electroweak Precision Data - Global Higgs Analysis

abstract:
  The status of published and preliminary precision electroweak measurements as
of winter 2002/03 is presented. The new results on the mass of the W boson as
measured at LEP-2 and on atomic parity violation in Caesium are included. The
experimental results are compared with the predictions of the minimal Standard
Model and are used to constrain its parameters, including the mass of the Higgs
boson. The agreement between measurements and expectations from theory is
discussed.


title: CAST: A search for solar axions at CERN

abstract:
  The new axion helioscope at CERN started acquiring data during September of
2002: CAST (Cern Axion Solar Telescope) employs a decommissioned LHC dipole
magnet to convert putative solar axions or axion-like particles into detectable
photons. The unprecedented dipole magnet intensity and length (9.5 T, 10 m)
results in a projected sensitivity that surpasses astrophysical constraints on
these particles for the first time, increasing the chance of discovery. The use
of X-ray focusing optics and state-of-the-art detector technology has led to an
extremely low background for an experiment above ground. A brief status report
is given, with emphasis on the tracking and control system and possible future
extensions.

categories: hep-ex astro-ph hep-ph nucl-ex physics.ins-det


title: Bose-Einstein and Other Correlations in Hadronic Z Decay

abstract:
  In hadronic Z decays, Bose-Einstein correlations in neutral pion pairs are
compared to those in identical charged pion pairs. Bose-Einstein correlations
are also measured in triplets of identical charged pions, and comparison with
those in pairs of pions indicates that pion production is completely
incoherent. Further, factorial cumulants are used to compare correlations among
like-sign as well as among all particles with those of several Monte Carlo
models.


title:
Aging Studies for the Large Honeycomb Drift Tube System of the Outer
  Tracker of HERA-B

abstract:
  The HERA-B Outer Tracker consists of drift tubes folded from polycarbonate
foil and is operated with Ar/CF4/CO2 as drift gas. The detector has to stand
radiation levels which are similar to LHC conditions. The first prototypes
exposed to radiation in HERA-B suffered severe radiation damage due to the
development of self-sustaining currents (Malter effect). In a subsequent
extended R&D program major changes to the original concept for the drift tubes
(surface conductivity, drift gas, production materials) have been developed and
validated for use in harsh radiation environments. In the test program various
aging effects (like Malter currents, gain loss due to anode aging and etching
of the anode gold surface) have been observed and cures by tuning of operation
parameters have been developed.


title:
First measurement of the T-violating muon polarization in the decay K^+
  --> mu^+ nu gamma

abstract:
  We present the result of the first measurement of the T-violating muon
polarization P_T in the decay K^+ --> mu^+ nu gamma. This polarization is
sensitive to new sources of CP-violation in the Higgs sector. Using data
accumulated in the period 1996-98 we have obtained P_T = (-0.64 +- 1.85(stat)
+- 0.10(syst))x10^{-2} which is consistent with no T-violation in this decay.


title: DIRC for a Higher Luminosity B Factory

abstract:
  The DIRC, a novel type of Cherenkov ring imaging device, is the primary
hadronic particle identification system for the BaBar detector at the
asymmetric B-factory Pep-II at SLAC. It is based on total internal reflection
and uses long, rectangular bars made from synthetic fused silica as Cherenkov
radiators and light guides. BaBar began taking data with colliding beams in
late spring 1999. This paper describes the challenges for the DIRC in a higher
luminosity environment and shows solutions to these challenges.


title:
The AMI Database Project: Atlas Data Challenge Bookkeeping, and the Tag
  Collector, a new tool for Release Management

abstract:
  Many database tools have the same or similar requirements. The Atlas Metadata
Interface (AMI) project aims to provide a set of generic tools for managing
database applications. AMI has a three-tier architecture with a core that
supports a connection to any RDBMS using JDBC and SQL. The middle layer assumes
that the databases have an AMI compliant self-describing structure. It provides
a generic web interface and a generic command line interface. The top layer
contains application specific features. Currently 7 such applications exist.
Two of these applications are described. The first, and principal use of AMI,
is the Atlas Data Challenge Production Bookkeeping interface. The second
application is called Tag Collector, a web tool for release management, has
many features which have greatly facilitated Atlas software management.


title: A Search for B- -> tau- nu-bar Recoiling Against a Fully Reconstructed B

abstract:
  We present a search for the B- ->tau- nu-bar decay in a data sample of 82
fb^(-1) collected at the Y(4S) resonance with the BaBar detector at the SLAC
PEP-II asymmetric B Factory. Continuum and combinatorial backgrounds are
suppressed by selecting a sample of events with one completely reconstructed B.
The decay products of the other B in the event are analyzed to search for a B-
-> tau- nu-bar decay. The tau lepton is identified in the following decay
channels: tau->e, tau->mu, tau->pi, tau->pi pi0 nu, tau->pi pi pi nu. We find
no evidence for a signal and set a 90% C.L. upper limit of BR(B->tau nu) <
7.7x10^(-4). We combine this result with another BaBar measurement searching
for B- -> tau- nu-bar decays in a sample with one B meson reconstructed in
semi-leptonic channels. The two samples are statistically independent. We
obtain a combined 90% C.L. upper limit of BR(B->tau nu) < 4.1x10^(-4). All
results are preliminary.


title: QCD and W Mass Determination at LEP

abstract:
  Measurements of hadronic final state interactions in W-pair events at LEP are
presented. In particular, different scenarios of colour reconnection are
studied. The data agree with moderate colour reconnection effects. Extreme
scenarios are ruled out, limiting the systematic uncertainty on the LEP W mass
determination due to this effect. An updated measurement of the mass of the W
boson at LEP yields 80.412 +/- 0.042 GeV.


title:
Measurement of branching fraction ratios and CP asymmetries in $B^{\pm}
  \to D_{CP}K^{\pm}$

abstract:
  We report results on the decay $B^{-} \to D_{CP}K^{-}$ and its charge
conjugate using a data sample of 85.4 million $B\bar{B}$ pairs recorded at the
$\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric
$e^{+}e^{-}$ storage ring. Ratios of branching fractions of Cabibbo-suppressed
to Cabibbo-favored processes are determined to be ${\cal B}(B^- \to D^0
K^-)/{\cal B}(B^- \to D^0 \pi^-)= 0.077 \pm 0.005(stat) \pm 0.006(sys)$, ${\cal
B}(B^- \to D_1 K^-)/{\cal B}(B^- \to D_1 \pi^-) = 0.093 \pm 0.018(stat) \pm
0.008(sys)$ and ${\cal B}(B^- \to D_2 K^-)/{\cal B}(B^- \to D_2 \pi^-) = 0.108
\pm 0.019(stat) \pm 0.007(sys)$ where the indices 1 and 2 represent the CP=+1
and CP=$-$1 eigenstates of the $D^{0}-\bar{D^{0}}$ system, respectively. We
find the partial-rate charge asymmetries for $B^{-} \to D_{CP}K^{-}$ to be
${\cal{A}}_1 = 0.06 \pm 0.19(stat) \pm 0.04(sys)$ and ${\cal{A}}_2 = -0.19 \pm
0.17(stat) \pm 0.05(sys)$.


title: A RICH Multiplicity Veto for the HERA-B Experiment

abstract:
  We present the design and commissioning of a new multiplicity veto for the
HERA-B detector, a fixed-target spectrometer originally designed to study the
physics of B mesons in proton-nucleus interactions. The HERA-B trigger is a
message-driven multi-level track trigger. The first level trigger (FLT)
consists of custom-made electronics, and the higher trigger levels are
implemented as PC farms.
  The multiplicity veto has been designed to reject high-multiplicity events
before they enter the trigger chain. A veto signal is generated based on the
comparison of the number of photons in part of the HERA-B ring-imaging
Cherenkov counter (RICH) with a programmable threshold.
  The RICH Multiplicity Veto is a modular system. First the hits in 256
detector channels are summed by Base Sum Cards (BSC), then FED Sum Cards (FSC)
sum the subtotals of up to eight BSCs. Finally the Veto Board (VB) takes the
veto decision based on the sum of up to 14 FSCs.
  The RICH Multiplicity Veto has been successfully installed and commissioned
in HERA-B. The measured veto efficiency is (99.9991+/-0.0001)%, and the system
is used in the routine data-taking of the HERA-B experiment.


title:
Measurement of $ep \to e^{'}p\pi^{+}\pi^{-}$: experimental procedures
  and baryon resonance analysis

abstract:
  The cross section for the reaction $ e p \to e^{\prime} p \pi^{+} \pi^{-}$
was measured in the resonance region for 1.4$<$W$<$2.1 GeV and 0.5$<Q^{2}<$1.5
GeV$^{2}$/c$^{2}$ using the CLAS detector at Jefferson Laboratory. The data
show resonant structures not visible in previous experiments. The comparison of
our data to a phenomenological prediction using available information on
$N^{*}$ and $\Delta$ states shows an evident discrepancy. A better description
of the data is obtained either by a sizeable change of the properties of the
$P_{13}$(1720) resonance or by introducing a new baryon state, not reported in
published analyses.


title:
Improved Measurement of the Partial-Rate CP Asymmetry in B+ -> K0pi+ and
  B- -> K0bar pi- Decays

abstract:
  We report an improved measurement of the partial-rate CP asymmetry in B+ =>
K0pi+ and B- => K0bar pi- decays. The analysis is based on a data sample of 85
million BBbar pairs collected at the Upsilon(4S) resonance with the Belle
detector at the KEKB e+ e- storage ring. We measure Acp(K0pi+-) = 0.07^{+0.09
+0.01}_{-0.08 -0.03}, where the first and second errors are statistical and
systematic, respectively; the corresponding 90% confidence-level interval is
-0.10 < Acp(K0pi+-) < 0.22 .


title: Measurement of the Charge Asymmetry in $B\to K^* (892)^{\pm}\pi^{\mp}$

abstract:
  We report on a search for a CP-violating asymmetry in the charmless hadronic
decay B -> K*(892)+- pi-+, using 9.12 fb^-1 of integrated luminosity produced
at \sqrt{s}=10.58 GeV and collected with the CLEO detector. We find A_{CP}(B ->
K*(892)+- pi-+) = 0.26+0.33-0.34(stat.)+0.10-0.08(syst.), giving an allowed
interval of [-0.31,0.78] at the 90% confidence level.


title:
Atmospheric neutrino oscillations from upward throughgoing muon multiple
  scattering in MACRO

abstract:
  The energy of atmospheric neutrinos detected by MACRO was estimated using
multiple coulomb scattering of upward throughgoing muons. This analysis allows
a test of atmospheric neutrino oscillations, relying on the distortion of the
muon energy distribution. These results have been combined with those coming
from the upward throughgoing muon angular distribution only. Both analyses are
independent of the neutrino flux normalization and provide strong evidence,
above the 4 sigma level, in favour of neutrino oscillations.


title:
Mid-Rapidity Neutral Pion Production in Proton-Proto Collisions at
  sqrt(s_NN) = 200 GeV

abstract:
  The invariant differential cross section for inclusive neutral pion
production in p+p collisions at sqrt(s_NN) = 200 GeV has been measured at
mid-rapidity |eta| < 0.35 over the range 1 < p_T <~ 14 GeV/c by the PHENIX
experiment at RHIC. Predictions of next-to-leading order perturbative QCD
calculations are consistent with these measurements. The precision of our
result is sufficient to differentiate between prevailing gluon-to-pion
fragmentation functions.


title: Neutrino anomalies

abstract:
  Solar and atmospheric evidences have been established and can be explained by
neutrino masses. Furthermore, other experiments claim a few unconfirmed
neutrino anomalies. We critically reanalyze the 0nu2beta, LSND and NuTeV
anomalies.


title:
Observation of a baryon resonance with positive strangeness in K+
  collisions with Xe nuclei

abstract:
  The status of our investigation of low-energy $K^+$Xe collisions in the Xenon
bubble chamber DIANA is reported. In the charge-exchange reaction $K^+Xe \to
K^0 p Xe'$ the spectrum of $K^0 p$ effective mass shows a resonant enhancement
with $M = 1539 \pm 2$ MeV/c$^2$ and $\Gamma \le 9 MeV/c$^2$. The statistical
significance of the enhancement is near $4.4\sigma$. The mass and width of the
observed resonance are consistent with expectations for the lightest member of
the anti-decuplet of exotic pentaquark baryons, as predicted in the framework
of the chiral soliton model.


title: Optical Properties of the DIRC Fused Silica Cherenkov Radiator

abstract:
  The DIRC is a new type of Cherenkov detector that is successfully operating
as the hadronic particle identification system for the BABAR experiment at
SLAC. The fused silica bars that serve as the DIRC's Cherenkov radiators must
transmit the light over long optical pathlengths with a large number of
internal reflections. This imposes a number of stringent and novel requirements
on the bar properties. This note summarizes a large amount of R&D that was
performed both to develop specifications and production methods and to
determine whether commercially produced bars could meet the requirements. One
of the major outcomes of this R&D work is an understanding of methods to select
radiation hard and optically uniform fused silica material. Others include
measurement of the wavelength dependency of the internal reflection
coefficient, and its sensitivity to surface contaminants, development of
radiator support methods, and selection of good optical glue.


title: Studies of Radiative Penguin B Decays at BaBar

abstract:
  We summarize results on a number of observations of penguin dominated
radiative decays of the B meson. Such decays are forbidden at tree level and
proceed via electroweak loops. As such they may be sensitive to physics beyond
the standard model. The observations have been made at the BaBar experiment at
PEP-II, the asymmetric B factory at SLAC.


title:
Measurement of the Branching Fractions for the Exclusive Decays of B^0
  and B^+ to Dbar^(*)D^(*)K

abstract:
  We report the observation of 823+/-57 B^0 and 970+/-65 B^+ decays to doubly
charmed final states Dbar^(*)D^(*)K, where Dbar^(*) and D^(*) are fully
reconstructed and K is either a K+/- or a K^0. We use a sample of 82.3+/- 0.9
million BBbar events collected between 1999 and 2002 with the babar detector at
the PEP-II storage ring at the Stanford Linear Accelerator Center. The 22
possible B decays to Dbar^(*)D^(*)K are reconstructed exclusively and the
corresponding branching fractions or limits are determined. The branching
fractions of the B^0 and of the B^+ to Dbar^(*)D^(*)K$ are found to be BR(B^0
--> Dbar^(*) D^(*) K) = (4.3 +/- 0.3 stat +/- 0.6 syst)%, BR(B^+ --> Dbar^(*)
D^(*) K) = (3.5 +/- 0.3 stat +/- 0.5 syst)%.
  A search for decays to orbitally excited $D_s$ states, B --> Dbar^(*)
D_{sJ}^{+} (D_{sJ}^{+} --> D^(*)0K^+) is also performed.


title:
Noninvasive measurement of micron electron beam size of high energy
  using diffraction radiation

abstract:
  Treatments of the usage of optical diffraction radiation from the
relativistic electrons moving though a conductive slit for the noninvasive
transverse beam size measurement encounter hard limitation of the method
sensitivity for the electron energy larger than 1 GeV. We consider in this
article a possibility of application in a diffraction radiation technique the
artificial phase shift, which can take place when transverse electron position
varies. This allows us to realize the nonivasive measurements of transverse
size of supper-relativistic electron beams with the small emittance.


title: Search for Baryons in the Radiative Penguin Decay b--> s gamma

abstract:
  We have searched for the baryon-containing radiative penguin decays B^- ->
\Lambda p-bar \gamma and B^- -> \Sigma^0 p-bar \gamma, using a sample of 9.7
million BBbar events collected at the \Upsilon(4S) with the CLEO detector. We
find no evidence for either, and set 90% confidence level upper limits for
photons with B rest frame energy greater than 2.0 GeV of [Br(B^- -> \Lambda
p-bar \gamma) + 0.3 Br(B^- -> \Sigma^0 p-bar \gamma)] < 3.3 x 10^-6, [Br(B^- ->
\Sigma^0 p-bar \gamma) + 0.4 Br(B^- -> \Lambda p-bar \gamma)] < 6.4 x 10^-6.
  From the latter, we estimate (for photons with B rest frame energy greater
than 2.0 GeV) Br(B -> X_s \gamma, X_s containing baryons) < 3.8 x 10^-5. This
limit implies upper limits on corrections to CLEO's recent measurement of
branching fraction, mean photon energy, and variance in photon energy from b ->
s \gamma that are less than half the combined statistical and systematic errors
quoted on these quantities.


title: Charm Physics Results from CLEO

abstract:
  We present recent results in the charm sector from the CLEO Collaboration.
The data used were collected by the CLEO II and III detectors at the Cornell
Electron Storage Ring (CESR). Measurements of form factors and branching
fractions in semileptonic decays of D-meson and charmed-baryons, searches for
CP violation and rare decays, and Dalitz analyses of D-meson decays are
discussed, as well as future plans for the CLEO-c experiment at CESR-c.


title: A Review of the Supersymmetry Searches at LEP

abstract:
  The searches for supersymmetric particles by the four LEP experiments, ALEPH,
DELPHI, L3, OPAL, have been made for many different theoretical models and
phenomenological scenarios. Since no significant signs of a SUSY signal have
been observed the results have been used to set exclusion limits and to
constrain the supersymmetric parameter space. This talk will focus on combined
SUSY searches, within the mSUGRA framework, from the four LEP experiments. The
results are based mainly on the data recorded between the years 1996-2000,
which corresponds to an integrated luminosity of 2.7 fb$^{-1}$ and
center-of-mass energies from 161 up to 208 GeV.


title: Can We Detect Tachyons Now?

abstract:
  An exact solution of the Einstein-Maxwell equations enables us to construct a
hypothesis on the production of tachyons. The hypothesis determines the
kinematical relations for the produced tachyon. It also makes possible to
estimate the empiric conditions necessary for the production. These conditions
can occur when nonpositive subatomic particles of high energy strike atomic
nuclei other than the proton. This suggests how experiments to search for
tachyons can be performed. According to the hypothesis properly designed
experiments with air showers or with the use of the strongest colliders may be
successful. Failure of the air shower experiments performed hitherto is
explained on the grounds of the hypothesis.


title: Searches for New Physics at D0

abstract:
  The integrated luminosity at Run 2 of the Tevatron is approaching the Run 1
total, and data analysis is progressing. New results in searches for new
physics by the DO experiment are presented in a variety of channels,
demonstrating good performance of the detector and detailed understanding of
the data.


title:
Search For Pair Production of Scalar Top Quarks in R-parity Violating
  Decay Modes in ppbar Collisions at sqrt{s} = 1.8 TeV

abstract:
  We present the results of a search for pair production of scalar top quarks
in an R-parity violating supersymmetry scenario in 106 pb-1 of ppbar collisions
at $\sqrt{s} = 1.8$ TeV collected by the Collider Detector at Fermilab. In this
mode each scalar top quark decays into a tau lepton and a b quark. We search
for events with two tau's, one decaying leptonically (e or mu) and one decaying
hadronically, and two jets. No candidate events pass our final selection
criteria. We set a 95% confidence level lower limit on the scalar top quark
mass at 122 GeV/c2 for Br (stop-> tau + b) = 1.


title: Determination of the LEP Beam Energy using Z Recoil Events

abstract:
  The precise knowledge of the beam energy, E_beam, at the LEP collider is
important to reduce the systematic uncertainty on the W mass. The measurements
by the LEP energy group can be cross checked using Z recoil events. Preliminary
results of the four LEP experiments ALEPH, DELPHI, L3, and OPAL are presented.
The combination of the results shows no significant deviation of the E_beam
value obtained using Z recoil events from the measurement by the LEP energy
group.


title: Pionic Hydrogen at PSI

abstract:
  The measurement of the pion-nucleon scattering lengths constitutes a
high-precision test of the methods of Chiral Pertubation Theory, which is the
low-energy approach of QCD. The pion-nucleon s-wave scattering lengths are
related to the strong-interaction shift and width of the s-states of the pionic
hydrogen atom. Shift and width are determined from the measured energies and
line widths of X-ray transitions to the 1s ground state when compared to the
calculated electromagnetic values. A new experiment, set up at the
Paul-Scherrer-Institut, has completed a first series of measurements.


title:
Baryon Pair, rho0 rho0 Pair and Inclusive Hadron Production in
  Two-Photon Collisions at LEP

abstract:
  The most recent results of inclusive hadron, baryon pair and rho0 rho0
productions in two-photon collisions measured at LEP are presented.


title: Bose-Einstein correlations in WW pair production at LEP

abstract:
  This paper presents an overview of the latest results from the L3 and DELPHI
collaborations concerning the measurement of Bose-Einstein correlations between
identical bosons coming from different W's in fully hadronic WW decays. Using
the same method, L3 sees no indication of any inter-W BEC effect, while DELPHI
reports an indication of inter-W BEC between like-charged particles of the
order of three standard deviations.


title: Search for new physics in e^\pm q contact interactions at HERA

abstract:
  Deep-inelastic e^\pm p scattering at high squared momentum transfer Q^2 up to
30000 GeV^2 is used to search for eq contact interactions associated to scales
far beyond the HERA centre of mass energy. The neutral current cross section
measurements d sigma / d Q^2, corresponding to integrated luminosities of 16.4
pb^-1 of e^- p data and 100.8 pb^-1 of e^+ p data, are well described by the
Standard Model and are analysed to set constraints on new phenomena. For
conventional contact interactions lower limits are set on compositeness scales
Lambda ranging between 1.6 - 5.5 TeV. Couplings and masses of leptoquarks and
squarks in R-parity violating supersymmetry are constrained to M / lambda > 0.3
- 1.4 TeV. A search for low scale quantum gravity effects in models with large
extra dimensions provides limits on the effective Planck scale of M_S > 0.8
TeV. A form factor analysis yields a bound on the radius of light quarks of R_q
< 1.0 x 10^-18 m.


title: FIPA agent based network distributed control system

abstract:
  A control system with the capabilities to combine heteregeneous control
systems or processes into a uniform homogeneous environment is discussed. This
dynamically extensible system is an example of the software system at the agent
level of abstraction. This level of abstraction considers agents as atomic
entities that communicate to implement the functionality of the control system.
Agents engineering aspects are addressed by adopting the domain independent
software standard, formulated by FIPA. Jade core Java classes are used as a
FIPA specification implementation. A special, lightweight, XML RDFS based,
control oriented, ontology markup language is developed to standardize the
description of the arbitrary control system data processor. Control processes,
described in this language, are integrated into the global system at runtime,
without actual programming. Fault tolerance and recovery issues are also
addressed.


title:
Observation of a Narrow Resonance of Mass 2.46 GeV/c^2 in the
  D_s^*+\pi^0 Final State, and Confirmation of the D_sJ^*(2317)

abstract:
  Using 13.5 fb^{-1} of e^+e^- annihilation data collected with the CLEO-II
detector, we have observed a new narrow resonance in the D_s^*\pi^0 final
state, with a mass near 2.46 GeV/c^2. The search for such a state was motivated
by the recent discovery by the BaBar Collaboration of a narrow state at 2.32
GeV/c^2, the D_{sJ}^*(2317)^+, that decays to D_s\pi^0. Reconstructing the
D_s\pi^0 and D_s^*\pi^0 final states in CLEO data, we observe a peak in each of
the corresponding reconstructed mass difference distributions, \Delta
M_{D_s\pi^0} = M(D_s\pi^0) - M(D_s) and \Delta M_{D_s^*\pi^0} = M(D_s^*\pi^0) -
M(D_s^*), both of them at values around 350 MeV/c^2. These peaks constitute
statistically significant evidence for two distinct states, at 2.32 and 2.46
GeV/c^2, taking into account the background source that each state comprises
for the other in light of the nearly identical values of \Delta M observed for
the two peaks. We have measured the mean mass differences \Delta M_{D_s\pi^0} =
350.4 \pm 1.2[stat.] \pm 1.0 [syst.] MeV/c^2 for the $D_{sJ}^*(2317)^+$ state,
and \Delta M_{D_s^*\pi^0} = 351.6 \pm 1.7[stat.] \pm 1.0 [syst.] MeV/c^2 for
the new state at 2.46 GeV/c^2. We have also searched, but find no evidence, for
decays of D_{sJ}^*(2317) into the alternate final states D_s^*\gamma,
D_s\gamma, and D_s\pi^+\pi^-. The observations of the two states at 2.32 and
2.46 GeV/c^2, in the D_s\pi^0 and D_s^*\pi^0 decay channels respectively, are
consistent with their possible interpretations as c s-bar mesons with orbital
angular momentum L=1, and spin-parity J^P = 0^+ and 1^+.


title:
Studies of correlations between D and ${\bar D}$ mesons in high energy
  photoproduction

abstract:
  Studies of $D{\bar D}$ correlations for a large sample of events containing
fully and partially reconstructed pairs of charmed $D$ mesons recorded by the
Fermilab photoproduction experiment FOCUS (FNAL-E831) are presented.
Correlations between $D$ and ${\bar D}$ mesons are used to study heavy quark
production dynamics. We present results for fully and partially reconstructed
charm pairs and comparisons to a recent version of \textsc{Pythia} with default
parameter settings. We also comment on the production of $\psi(3770)$ in our
data.


title: Collider Experiment: Strings, Branes and Extra Dimensions

abstract:
  Selected topics showcasing the exploration for new physics using colliders;
presented at TASI 2001.


title: bb-bar Production Cross Section in 920 GeV p-N Collisions

abstract:
  The b-bbar production cross section in 920 GeV proton - nucleus collisions
was obtained with the HERA-B detector, using a sample of 1.35 million of
di-lepton triggered events taken during the 2000 physics run. The b-bbar events
are identified via the inclusive decay b->J/psi, where the J/Psi mesons decay
to mu+mu- or e+e-. The b events are separated from directly produced J/psi's by
requiring that the J/psi decay vertex does not coincide with the primary
vertex. The total measured cross section per nucleon, combining the results
obtained in the two channels, is 32 +14 -12(stat) +6 -7(sys) nb/nucleon. The
result is compared with the most recent QCD prediction and other experimental
results. A much more precise measurement will be obtained from the 2002/2003
data.


title: Results on searches for new physics at HERA

abstract:
  The H1 and ZEUS collaborations have searched for signals of physics beyond
the Standard Model in ep collisions at a center-of-mass energy of 301-319 GeV.
During the HERA I phase each experiment accumulated an integrated luminosity of
about 110 pb^{-1} for e^+p and about 15 pb^{-1} for e^-p collisions. The data
have been analysed searching for contact interaction effects, leptoquarks,
lepton flavor violation, squarks in R-parity violating supersymmetric models,
excited fermions and FCNC single top production. In this article a summary of
the results is given.


title: DIRAC: A High Resolution Spectrometer for Pionium Detection

abstract:
  The DIRAC spectrometer has been commissioned at CERN with the aim of
detecting $\pi^+ \pi^-$ atoms produced by a 24 GeV/$c$ high intensity proton
beam in thin foil targets. A challenging apparatus is required to cope with the
high interaction rates involved, the triggering of pion pairs with very low
relative momentum, and the measurement of the latter with resolution around 0.6
MeV/$c$. The general characteristics of the apparatus are explained and each
part is described in some detail. The main features of the trigger system,
data-acquisition, monitoring and setup performances are also given.


title: QCD Studies with Resurrected Jade Data

abstract:
  We report on recent studies of QCD performed using reanalysed e+e-
annihilation data recorded at centre of mass energies 14<sqrt(s)<44 GeV by the
JADE experiment operated 1979 to 1986 at the PETRA e+e- collider at DESY,
Hamburg, Germany. The data for some event shape observables are compared to
modern Monte Carlo event generators using parameter values obtained from LEP 1
data. The distribution of ln(1/x) with x=2p/sqrt(s) and p the momentum of a
charged hadron is measured and compared to QCD predictions. Fits of
O(alpha_S^2)+NLLA (resummed) QCD predictions combined with power corrections to
event shape data including for the first time the sqrt(s)=14 and 22 GeV data
samples are discussed.


title: Lectures on B Physics and CP Violation

abstract:
  These lectures present the phenomenology of B meson decays and their impact
on our understanding of CP violation in the quark sector, with an emphasis on
measurements made at the e+e- B factories. Some of the relevant theoretical
ideas such as the Operator Product Expansion and Heavy Quark Symmetry are
introduced, and applications to the determination of CKM matrix elements given.
The phenomenon of B flavor oscillations is reviewed, and the mechanisms for and
current status of CP violation in the B system is given. The status of rare B
decays is also discussed.


title: Measurement of gauge boson couplings and W spin density matrix

abstract:
  During the LEP2 period the e+e- collider increased its center of mass energy
from 161 GeV to 209 GeV and a total integrated luminosity of approximately 700
pb-1 was recorded per experiment. Pairs of W bosons are produced and allow the
study of gauge boson couplings involving W, Z and photon. The coupling of the W
boson to the neutral gauge bosons have been measured and are in agreement with
the Standard Model prediction. Limits are set on CP-violating couplings by a
Spin Density Matrix analysis of the W decay products. No evidence has been
found for couplings of three neutral gauge bosons. Limits are derived on
couplings of four gauge bosons.


title: Towards a measurement of $\phi_3$

abstract:
  Results on the decays $B^{-} \to D_{CP}K^{-}$, $\bar{B^{0}} \to
D^{(*)0}\bar{K}^{(*)0}$, $B^{0} \to D^{*\mp}\pi^{\pm}$ and their charge
conjugates using data collected at the $\Upsilon(4S)$ resonance with the Belle
detector at the KEKB asymmetric $e^{+}e^{-}$ storage ring are reported. The
implications for the determination of the weak phase $\phi_{3}$ are discussed.


title: Search for new particles at CDFII

abstract:
  We report on the first results from the CDF experiment on search for physics
beyond the Standard Model using data from the upgraded TeVatron collider
running $p\bar p$ collisions at $\sqrt{s}$ = 1960 GeV. These first results,
although obtained with a total integrated luminosity lower than the total
integrated luminosity collected during Run I, are already competitive if not
better, due to the increase in the center of mass energy and the improved
detector capability.


title: Measurement of deeply virtual Compton scattering at HERA

abstract:
  The cross section for deeply virtual Compton scattering in the reaction ep ->
e gamma p has been measured with the ZEUS detector at HERA using integrated
luminosities of 95.0 pb-1 of e+p and 16.7 pb-1 of e-p collisions. Differential
cross sections are presented as a function of the exchanged-photon virtuality,
Q2, and the centre-of-mass energy, W, of the gamma*p system in the region 5 <
Q2 < 100 GeV2 and 40 < W < 140 GeV. The measured cross sections rise steeply
with increasing W. The measurements are compared to QCD-based calculations.


title:
Photon Structure and Heavy Flavour Production in gammagamma Collisions
  at LEP

abstract:
  New results reported at the Moriond-QCD 2003 conference from the experiments
ALEPH, DELPHI, L3, and OPAL on the structure of the photon as well as heavy
quark production in gammagamma collisions are presented. The hadronic structure
of the photon is studied in single-tagged events; the interaction of two
virtual photons is investigated in double-tagged events. Di-jet events allow,
besides constraining the photon structure, investigations on the structure of
jets, measurement of the di-jet as well as inclusive and differential cross
sections. Inclusive charm and bottom production are investigated at LEP~2
energies. The total and differential cross sections for charm quarks are now
measured by all four LEP collaborations, the total bottom by two. Charmonia are
detected inclusively via the muonic decay of the J/psi and separated for the
resolved and diffractive processes. Updated results are available for exclusive
production of the eta_c meson. The search for exclusive eta_b production is
presented.


title: Recent Results From CHORUS Charm Analysis

abstract:
  The CHORUS experiment was designed to search for $\nu_{\mu}\to \nu_{\tau}$
oscillation by detecting the decay topology of the $\tau$ in charged current
(CC) $\nu_{\tau}$ events. The detector was exposed to the Wide Band Neutrino
Beam of the CERN SPS during the years 1994-1997. About $10^{6} \nu_{\mu}$ CC
events were collected in the nuclear emulsion target. Up to now, about 170,000
$\nu_{\mu}$ events have been located and analysed. The speed of the automated
emulsion scanning systems increases each year. With the present performance of
these systems, it has become possible to perform large volume scanning. All
tracks belonging to an interaction vertex can be recognized and measured
precisely. This technique is not only applied to the search for neutrino
oscillation but can also be used for the recognition of events where charmed
particles are produced. Results obtained from the analysis of a sub-sample of
the data on the production rate in $\nu_\mu$ CC interactions of neutral charmed
mesons ($D^0$) and charmed baryons ($\Lambda_c$) are presented. In addition a
new measurement of the branching ratio for the decays of charmed hadrons into
muons is given. Also measurements of topological branching ratios of $D^0$ and
$\Lambda_c$ are presented. Finally, a search for associated charm production is
discussed.


title:
Search for Stable and Long-Lived Massive Charged Particles in e+e-
  Collisions at sqrt(s) = 183-209 GeV

abstract:
  A search for stable and long-lived massive particles of electric charge
|Q/e|=1 or fractional charges of 2/3, 4/3, and 5/3 is reported using data
collected by the OPAL detector at LEP, at centre-of-mass energies from 130 to
209 GeV. These particles are assumed to be pair-produced in e+e- collisions and
not to interact strongly. No evidence for the production of these particles was
observed. Model-independent upper limits on the production cross-section
between 0.005 and 0.028 pb have been derived for scalar and spin-1/2 particles
with charge +-1. Within the framework of the Constrained Minimal Supersymmetric
Standard Model (CMSSM), this implies a lower limit of 98.0 (98.5) GeV on the
mass of long-lived right (left)- handed scalar muons and scalar taus.
Long-lived charged heavy leptons and charginos are excluded for masses below
102.0 GeV. For particles with fractional charge +-2/3, +-4/3, and +-5/3, the
upper limit on the production cross-section varies between 0.005 and 0.020 pb.
All mass and cross-section limits are derived at the 95% confidence level and
are valid for particles with lifetimes longer than 10-6s.


title: Parallel Reconstruction of CLEO III Data

abstract:
  Reconstruction of one run of CLEO III raw data can take up to 9 days to
complete using a single processor. This is an administrative nightmare, and
even minor failures result in reprocessing the entire run, which wastes time,
money and CPU power. We leveraged the ability of the CLEO III software
infrastructure to read and write multiple file formats to perform
reconstruction of a single run using several CPUs in parallel. Using the Sun
Grid Engine and some Perl scripts, we assign roughly equal-sized chunks of
events to different CPUs. The Raw data are read from an Objectivity/DB
database, but the reconstruction output is written to a temporary file, not the
database. This takes about 6 hours. Once all the chunks have been analyzed,
they are gathered together in event-number order and injected into
Objectivity/DB. This process takes an additional 6 to 18 hours, depending on
run size. A web-based monitoring tool displays the status of reconstruction.
Many benefits accrue from this process, including a dramatic increase in
efficiency, a 20% increase in luminosity processed per week, more predictable
and manageable processor farm load, reduction in the time to stop the processor
farm from up to 9 days to less than 24 hours, superior fault tolerance, quicker
feedback and repair times for bugs in the reconstruction code, and faster
turn-around of early runs for data quality and software correctness checks.


title: CP violation in B0 -> pi+ pi- decay

abstract:
  We present an improved measurement of CP-violating asymmetries in B0 -> pi+
pi- decays based on a 78/fb data sample collected at the Y(4S) resonance with
the Belle detector at the KEKB asymmetric-energy e+e- collider. We reconstruct
one neutral B meson as a B0 -> pi+ pi- CP eigenstate and identify the flavor of
the accompanying B meson from its decay products. From the asymmetry in the
distribution of the time intervals between the two B meson decay points, we
obtain the CP-violating asymmetry amplitudes Apipi =
+0.77+/-0.27(stat)+/-0.08(syst) and Spipi =
-1.23+/-0.41(stat)+0.08/-0.07(syst), where the statistical uncertainties are
determined from Monte Carlo pseudo-experiments. We rule out the CP-conserving
case, Apipi=Spipi=0, at the 99.93% confidence level. We discuss how these
results constrain the value of the CKM angle phi2.


title:
Including gaussian uncertainty on the background estimate for upper
  limit calculations using Poissonian sampling

abstract:
  A procedure to include the uncertainty on the background estimate for upper
limit calculations using Poissonian sampling is presented for the case where a
Gaussian assumption on the uncertainty can be made. Under that hypothesis an
analytic expression of the likelihood is derived which can be written in terms
of polynomials defined by recursion. This expression may lead to a significant
speed up of computing applications that extract the upper limits using Toy
Monte Carlo.


title:
Measurement of the ratio Gamma(K_L -> gamma gamma)/Gamma(K_L -> pi^0
  pi^0 pi^0) with the KLOE detector

abstract:
  We have measured the ratio R=Gamma(K_L -> gamma gamma)/ \Gamma(K_L -> 3 pi^0)
using the KLOE detector. From a sample of ~ 10^9 phi-mesons produced at DAFNE,
the Frascati phi-factory, we select ~ 1.6 10^8 K_L-mesons tagged by observing
K_S -> pi^+ pi^- following the reaction e^+ e^- -> phi -> K_L K_S. From this
sample we select 27,375 K_L -> gamma gamma events and obtain R = (2.79 \pm
0.02_{stat} \pm 0.02_{syst}) \times 10^{-3}. Using the world average value for
BR(K_{L} -> 3 pi^0), we obtain BR(K_{L} -> gamma gamma) = (5.89 \pm 0.07 \pm
0.08) \times 10^{-4} where the second error is due to the uncertainty on the 3
pi^0 branching fraction.


title: Rare Hadronic B Decays and Direct CPV from Belle and BaBar

abstract:
  Recent measurements of branching fractions and CP-violating partial-rate
asymmetries for rare hadronic B-meson decays by the asymmetric-energy B-factory
experiments, Belle and BaBar, are reviewed.


title: Measurement of Vub at Belle

abstract:
  Results on two inclusive Vub measurements at Belle are presented. We also
present a new measurement of the branching fraction for Ds->phi pi. A data
sample of 78.1fb^-1 accumulated using the Belle detector at the KEKB asymmetric
e^+e^- collider operating at the Upsilon(4S) resonance is used. All results are
preliminary.


title: Measurements of $\Xi_c^{+}$ Branching Ratios

abstract:
  Using data collected by the fixed target Fermilab experiment FOCUS, we
measure the branching ratios of the Cabibbo favored decays $\Xi_c^+ \to
\Sigma^+K^-\pi^+$, $\Xi_c^+ \to \Sigma^+ \bar{K}^{*}(892)^0$, and $\Xi_c^+ \to
\Lambda^0K^-\pi^+\pi^+$ relative to $\Xi_c^+ \to \Xi^-\pi^+\pi^+$ to be
$0.91\pm0.11\pm0.04$, $0.78\pm0.16\pm0.06$, and $0.28\pm0.06\pm0.06$,
respectively. We report the first observation of the Cabibbo suppressed decay
$\Xi_c^+ \to \Sigma^+K^+K^-$ and we measure the branching ratio relative to
$\Xi_c^+ \to \Sigma^+K^-\pi^+$ to be $0.16\pm0.06\pm0.01$. We also set 90%
confidence level upper limits for $\Xi_c^+ \to \Sigma^+ \phi$ and $\Xi_c^+ \to
\Xi^*(1690)^0(\Sigma^+ K^-) K^+$ relative to $\Xi_c^+ \to \Sigma^+K^-\pi^+$ to
be 0.12 and 0.05, respectively. We find an indication of the decays $\Xi_c^+
\to \Omega^-K^{+}\pi^+$ and $\Xi_c^+ \to \Sigma^{*}(1385)^+ \bar{K}^0$ and set
90% confidence level upper limits for the branching ratios with respect to
$\Xi_c^+ \to \Xi^-\pi^+\pi^+$ to be 0.12 and 1.72, respectively. Finally, we
determine the 90% C.L. upper limit for the resonant contribution $\Xi_c^+ \to
\Xi^{*}(1530)^0 \pi^+$ relative to $\Xi_c^+ \to \Xi^-\pi^+\pi^+$ to be 0.10.


title: Higgs Boson Searches at LEP

abstract:
  The results of the Higgs boson searches performed by the four LEP experiments
at centre-of-mass energies between 189 GeV and 209 GeV corresponding to an
integrated luminosity of 2461 pb$^{-1}$ are presented here. Searches have been
performed for Higgs in the Standard Model (SM), in 2 Higgs Doublet Models
(2HDM's), for doubly charged, fermiophobic and invisible Higgs as well as a
decay mode independent search. Most of the results of the four experiments have
been combined by the LEP Higgs working group.


title: B Decays to Hadronic States with Charm/Charmonium in BaBar

abstract:
  In this paper the studies of three different B decays to hadronic states are
presented. These results are based on 1999-2003 dataset collected by the BaBar
experiment at the PEP-II e+e- storage ring at the Stanford Linear Accelerator
Center. The measurements are the hadronic branching fraction of B+ -> J/psi p
Lambda-bar, B0 -> J/psi p p-bar, B0 -> D*+D-, and the direct CP-asymmetry in B0
-> D0(CP) K- channels.


title: Top Quark and Electroweak Results From DZero

abstract:
  We report new top quark and electroweak results from the DZero Experiment,
which is accumulating luminosity from pbar-p collisions at center-of-mass
energy 1.86 TeV (Run II).


title:
New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching
  ratio

abstract:
  E865 at the Brookhaven National Laboratory AGS collected about 70,000 K+(e3)
events with the purpose of measuring the relative K+(e3) branching ratio. The
pi0 in all the decays was detected using the e+e- pair from pi0 -> e+e-gamma
decay and no photons were required. Using the Particle Data Group branching
ratios for the normalization decays we obtain
BR(K+(e3(gamma))=(5.13+/-0.02(stat)+/-0.09(sys)+/-0.04(norm))%, where
$K+(e3(gamma)) includes the effect of virtual and real photons. This result is
2.3 sigma higher than the current Particle Data Group value. The implications
of this result for the $V_{us}$ element of the CKM matrix, and the matrix's
unitarity are discussed.