title: Thrust Jet Analysis of Deep-Inelastic Large-Rapidity-Gap Events

abstract:
  A thrust analysis of Large-Rapidity-Gap events in deep-inelastic ep
collisions is presented, using data taken with the H1 detector at HERA in 1994.
The average thrust of the final states X, which emerge from the dissociation of
virtual photons in the range 10 < Q2 < 100 GeV2, grows with hadronic mass M_X
and implies a dominant 2-jet topology. Thrust is found to decrease with growing
Pt, the thrust jet momentum transverse to the photon-proton collision axis.
Distributions of Pt2 are consistent with being independent of MX. They show a
strong alignment of the thrust axis with the photon-proton collision axis, and
have a large high-Pt tail. The correlation of thrust with MX is similar to that
in e+e- annihilation at sqrt(see)=MX, but with lower values of thrust in the ep
data. The data cannot be described by interpreting the dissociated system X as
a qqbar state but inclusion of a substantial fraction of qqbarg parton
configurations leads naturally to the observed properties. The soft colour
exchange interaction model does not describe the data.


title: Search for rare Phi decays in pi+ pi_ gamma final state

abstract:
  A search for phi radiative decays has been performed using a data sample of
about 2.0 million phi decays collected by the CMD-2 detector at VEPP-2M
collider in Novosibirsk. From the selected e+ e- -> pi+ pi- gamma events the
following results were obtained: B(phi -> f0(980) gamma) < 1x10-4 for
destructive and B(phi -> f0(980) gamma) < 7x10-4 for constructive interference
with the Bremsstrahlung process respectively, B(phi -> gamma -> pi+ pi- gamma)
< 3x10-5 for E of gamma > 20 MeV, B(phi -> rho gamma) < 7x10-4. From the
selected e+ e- -> mu+ mu- gamma events B(phi -> mu+ mu- gamma) =
(2.3+-1.0)x10-5 has been obtained for E of gamma> 20 MeV. The upper limit on
the P,CP-violating decay eta -> pi+ pi- has also been placed: B(eta -> pi+ pi-)
< 9x10-4 . All upper limits are at 90 % C.L.


title:
Polarised Quark Distributions in the Nucleon from Semi-Inclusive Spin
  Asymmetries

abstract:
  We present a measurement of semi-inclusive spin asymmetries for positively
and negatively charged hadrons from deep inelastic scattering of polarised
muons on polarised protons and deuterons in the range $0.003<x<0.7$ and $Q^2>$1
GeV$^2$. Compared to our previous publication on this subject, with the new
data the statistical errors have been reduced by nearly a factor of two.
  From these asymmetries and our inclusive spin asymmetries we determine the
polarised quark distributions of valence quarks and non-strange sea quarks at
$Q^2$=10 GeV$^2$. The polarised $u$ valence quark distribution, $\Delta
u_v(x)$, is positive and the polarisation increases with $x$. The polarised $d$
valence quark distribution, $\Delta d_v(x)$, is negative and the non-strange
sea distribution, $\Delta \bar q(x)$, is consistent with zero over the measured
range of $x$. We find for the first moments $\int_0^1 \Delta u_v(x) dx = 0.77
\pm 0.10 \pm 0.08$, $\int_0^1 \Delta d_v(x) dx = -0.52 \pm 0.14 \pm 0.09$ and
$\int_0^1 \Delta \bar q(x) dx= 0.01 \pm 0.04 \pm 0.03$, where we assumed
$\Delta \bar u(x) = \Delta \bar d(x)$. We also determine for the first time the
second moments of the valence distributions $\int_0^1 x \Delta q_v(x) dx$.


title:
Estimation of Hydrodynamical Model Parameters from the Invariant
  Spectrum and the Bose-Einstein Correlations of pi-mesons Produced in
  (pi+/K+)p Interactions at 250 GeV/c

abstract:
  The invariant spectra of pi- mesons produced in (pi+/K+)p interactions at 250
GeV/c are analysed in the framework of the hydrodynamical model of
three-dimensionally expanding cylindrically symmetric finite systems.
  A satisfactory description of experimental data is achieved.
  The data favour the pattern according to which the hadron matter undergoes
predominantly longitudinal expansion and non-relativistic transverse expansion
with mean transverse velocity <u_t> = 0.20(7), and is characterized by a large
temperature inhomogeneity in the transverse direction: the extracted freeze-out
temperature at the center of the tube and at the transverse rms radius are
140(3) MeV and 82(7) MeV, respectively. The width of the (longitudinal)
space-time rapidity distribution of the pion source is found to be Delta eta =
1.36(2).
  Combining this estimate with results of the Bose-Einstein correlation
analysis in the same experiment, one extracts a mean freeze-out time of the
source of <tau_f> = 1.4(1) fm/c and its transverse geometrical rms radius, R_G
(rms)=1.2(2) fm.


title: Observation of Exclusive Two-Body B Decays to Kaons and Pions

abstract:
  We have studied two-body charmless hadronic decays of B mesons into the final
states $\pi\pi$, $K \pi$, and $KK$. Using 3.3 million $B\bar{B}$ pairs
collected with the CLEO-II detector, we have made the first observation of the
decays $B^0\to K^+\pi^-$, $B^+\to K^0\pi^+$, and the sum of $B^+ \to
\pi^+\pi^0$ and $B^+ \to K^+\pi^0$ decays (an average over charge-conjugate
states is always implied). We place upper limits on branching fractions for the
remaining decay modes.


title: Observation of the Radiative Decay $D^{*+}\to D^{+}\gamma$

abstract:
  We have observed a signal for the decay D*+ -> D+ gamma at a significance of
4 standard deviations. From the measured branching ratio B(D*+ -> D+
gamma)/B(D*+ -> D+ pi0)=0.055 +- 0.014 +- 0.010 we find B(D*+ -> D+ gamma)=
0.017 +- 0.004 +- 0.003, where the first uncertainty is statistical and the
second is systematic. We also report the highest precision measurements of the
remaining D*+ branching fractions.


title: Photo-production of psi' Mesons at HERA

abstract:
  Quasi-elastic (z >0.95) photo-production of psi' mesons has been observed at
HERA for photon-proton centre-of-mass energies in the range 40 to 160 GeV. The
psi' mesons were identified through their decays to l+l- and to J/psi pi+ pi-,
where the J/psi subsequently decays to l+l-, the lepton l being either a muon
or an electron. The cross-section for quasi-elastic photoproduction was
measured to be [18.0 +- 2.8 (stat) +- 3.0(syst)] nb at a photon-proton
centre-of-mass energy of 80 GeV. The ratio of the psi' to J/psi quasi-elastic
cross-sections is 0.150 +- 0.027 (stat) +- 0.022 (syst).


title: Examination of T/CP Invariance in the e+e- --> tau+ tau- Reaction

abstract:
  We propose a method to examine the T/CP invariance of the heaviest lepton,
tau, by means of a triple-momentum correlation for the reaction e^+e^-
-->tau^+tau^-, tau --> e/mu nu nubar during the course of the B-Factory
experimental program. An unprecedented high sensitivity could be obtained
without requiring a high integrated luminosity.


title:
A Method to include Detector Effects in Estimators sensitive to the
  Trilinear Gauge Couplings

abstract:
  This paper describes the use of weighted Monte Carlo events to accurately
approximate integrals of functions of the experimentally measured kinematical
vectors and their dependence on physical parameters. This technique is
demonstrated in estimating the evolution of cross sections, efficiencies,
measured kinematical distributions and mean values as functions of the
Trilinear Gauge Couplings.


title:
Accurate Estimation of the Trilinear Gauge Couplings Using Optimal
  Observables Including Detector Effects

abstract:
  This paper describes the definition of maximum likelihood equivalent
estimators of the Trilinear Gauge Couplings which include detector effects. The
asymptotic properties of these estimators as well as their unbiasedness and
efficiency when dealing with finite statistical samples are demonstrated by
Monte Carlo experimentation, using simulated events corresponding to the
production of q qbar lepton neutrino in e+ e- collisions at 172 GeV. Emphasis
is given to the determination of the expected efficiencies in extracting the
aWphi, aW and aBphi couplings from LEPII data, which in this particular case
found to be close to the maximum possible.


title: Results on Lambda Production at HERMES

abstract:
  The production of Lambda^0's at the HERMES experiment is presented. Prospects
for the future of Lambda measurements at HERMES are discussed.


title: Evidence for Parton kT Effects in High pT Particle Production

abstract:
  Inclusive pizero and direct-photon cross sections in the kinematic range 3.5
< pT < 12 GeV/c with central rapidities are presented for 530 and 800 GeV/c
proton beams and a 515 GeV/c pi- beam incident on beryllium targets. Current
Next-to-Leading-Order perturbative QCD calculations fail to adequately describe
the data for conventional choices of scales. Kinematic distributions from these
hard scattering events provide evidence that the interacting partons carry
significant initial-state parton transverse momentum (kT). Incorporating these
kT effects phenomenologically greatly improves the agreement between
calculations and the measured cross sections.


title: Charged particles and neutral kaons in photoproduced jets at HERA

abstract:
  Charged particles ($h^\pm$) and \kz mesons have been studied in photoproduced
events containing at least one jet of $E_T > 8$ GeV in a pseudorapidity
interval (--0.5, 0.5) in the ZEUS laboratory frame. Distributions are presented
in terms of transverse momentum, pseudorapidity and distance of the particle
from the axis of a jet. The properties of \hpm within the jet are described
well using the standard settings of PYTHIA, but the use of the multiparton
interaction option improves the description outside the jets. A reasonable
overall description of the \kz behaviour is possible with PYTHIA using a
reduced value of the strangeness suppression parameter. The numbers of $h^\pm$
and \kz within a jet as defined above are measured to be $3.25\pm0.02\pm0.28$
and $0.431\pm0.013\pm0.088$ respectively. Fragmentation functions are presented
for $h^\pm$ and \kz in photoproduced jets; agreement is found with calculations
of Binnewies et al. and, at higher momenta, with $p\bar p$ scattering and with
standard PYTHIA. Fragmentation functions in direct photoproduced events are
extracted, and at higher momenta give good agreement with data from related
processes in $e^+e^-$ annihilation and deep inelastic $ep$ scattering.


title:
The Hadronic Final States in Deep Inelastic $e\gamma$ Scattering at a
  Future e^+e^- Linear Collider

abstract:
  Energy flow distributions from tagged $\gamma\gamma$ events generated with
HERWIG are presented for $E_{beam} = 45.6$ GeV (LEP1) and $E_{beam} = 175$ GeV
(top-quark threshold at a future e^+e^- Linear Collider). They have very
similar shapes regardless of the beam energy. Using the present knowledge of
the LEP $F_2^{\gamma}$ analyses, it is forseen that the understanding of the
hadronic response of the forward region of the LC detector is vital to the
development of the final state models in $\gamma\gamma$ Monte Carlos. Such
models are relied upon to extract $F_2^{\gamma}$ from the data, and hence
understanding the forward region well may be crucial in the determination of
whether or not a low-$x$ rise exists in the photon structure function.


title: Heavy Quark Decays

abstract:
  Recent results in the decays of the heavy quarks, bottom and charm, are
reviewed.


title: Two-Photon Physics at RHIC: Separating Signals from Backgrounds

abstract:
  This presentation will show the feasibility of studying two-photon
interactions in the STAR experiment at RHIC. Signals, detection efficiencies,
backgrounds, triggering and analysis techniques will be discussed.


title:
Determination of the Michel Parameters rho, xi, and delta in tau-Lepton
  Decays with tau --> rho nu Tags

abstract:
  Using the ARGUS detector at the $e^+ e^-$ storage ring DORIS II, we have
measured the Michel parameters $\rho$, $\xi$, and $\xi\delta$ for
$\tau^{\pm}\to l^{\pm} \nu\bar\nu$ decays in $\tau$-pair events produced at
center of mass energies in the region of the $\Upsilon$ resonances. Using
$\tau^\mp \to \rho^\mp \nu$ as spin analyzing tags, we find $\rho_{e}=0.68\pm
0.04 \pm 0.08$, $\xi_{e}= 1.12 \pm 0.20 \pm 0.09$, $\xi\delta_{e}= 0.57 \pm
0.14 \pm 0.07$, $\rho_{\mu}= 0.69 \pm 0.06 \pm 0.08$, $\xi_{\mu}= 1.25 \pm 0.27
\pm 0.14$ and $\xi\delta_{\mu}= 0.72 \pm 0.18 \pm 0.10$. In addition, we report
the combined ARGUS results on $\rho$, $\xi$, and $\xi\delta$ using this work
und previous measurements.


title:
Evidence of phi --> pi0 pi0 gamma and phi --> pi0 eta gamma decays in
  SND experiment at VEPP-2M

abstract:
  Preliminary results on the study of e+e- --> phi(1020) --> pi0 pi0 gamma, eta
pi0 gamma processes from SND experiment at VEPP-2M collider in Novosibirsk are
presented. Branching ratios of rare radiative phi --> pi0 pi0 gamma and phi -->
pi0 eta gamma decays are measured:
  B(phi --> pi0 pi0 gamma ) = (1.1 +- 0.2) * 10^-4
  (invariant mass (pi0 pi0) < 800 MeV),
  B(phi --> eta pi0 gamma ) = (1.3 +- 0.5) * 10^-4.


title:
Hadronic Expansion Dynamics in Central Pb+Pb Collisions at 158 GeV per
  Nucleon

abstract:
  Two-particle correlation functions of negative hadrons over wide phase space,
and transverse mass spectra of negative hadrons and deuterons near mid-rapidity
have been measured in central Pb+Pb collisions at 158 GeV per nucleon by the
NA49 experiment at the CERN SPS. A novel Coulomb correction procedure for the
negative two-particle correlations is employed making use of the measured
oppositely charged particle correlation. Within an expanding source scenario
these results are used to extract the dynamic characteristics of the hadronic
source, resolving the ambiguities between the temperature and transverse
expansion velocity of the source, that are unavoidable when single and two
particle spectra are analysed separately. The source shape, the total duration
of the source expansion, the duration of particle emission, the freeze-out
temperature and the longitudinal and transverse expansion velocities are
deduced.


title: Jet Production at HERA

abstract:
  Studies on the structure of the photon are presented by means of the
extraction of a leading order effective parton distribution in the photon and
measurements of inclusive jet differential cross sections in photoproduction.
Measurements of the internal structure of jets have been performed and are also
presented as a function of the transverse energy and pseudorapidity of the
jets. Dijet cross sections have been measured as a function of the dijet mass
and centre-of-mass scattering angle.


title:
DIRC, the Internally Reflecting Ring Imaging Cherenkov Detector for
  BABAR

abstract:
  The DIRC is a new type of Cherenkov imaging device that will be used for the
first time in the BABAR detector at the asymmetric B-factory, PEP-II. It is
based on total internal reflection and uses long, rectangular bars made from
synthetic fused silica as Cherenkov radiator and light guide. The principles of
the DIRC ring imaging Cherenkov technique are explained and results from the
prototype program are presented. Its choice for the BABAR detector particle
identification system is motivated, followed by a discussion of the quartz
radiator properties and the detector design.


title: Local properties of local multiplicity distributions in hadronic Z decay

abstract:
  Preliminary results on local multiplicity fluctuations in hadronic Z decays
are presented. The data were obtained using the L3 detector at LEP. It is
investigated to what extent Monte-Carlo models, which are tuned to reproduce
global event-shape variables and single-particle inclusive distributions, can
describe the local fluctuations measured by means of bunching parameters.


title:
Multiplicities, fluctuations and QCD: Interplay between soft and hard
  physics?

abstract:
  Multiplicity fluctuations are studied both globaly (in terms of high-order
moments) and locally (in terms of small phase-space intervals). The ratio of
cumulant factorial to factorial moments of the charged-particle multiplicity
distribution shows a quasi-oscillatory behaviour similar to that predicted by
the NNLLA of perturbative QCD. However, an analysis of the sub-jet multiplicity
distribution at perturbative scales shows that these oscillations cannot be
related to the NNLLA prediction. We investigate how it is possible to reproduce
the oscillations within the framework of Monte-Carlo models. Furthermore, local
multiplicity fluctuations in angular phase-space intervals are compared with
Monte-Carlo models and with first-order QCD predictions. While JETSET
reproduces the experimental data very well, the predictions of the Double
Leading Log Approximations and estimates obtained in Modified Leading Log
Approximations deviate significantly from the data.


title:
Measurement of the B0 B0-bar oscillation frequency using pi-B meson
  charge-flavor correlations in p p-bar collisions at sqrt{s} = 1.8 TeV

abstract:
  We present a measurement of the B0 B0-bar oscillation frequency using a
flavor tagging method based on correlations of B meson flavor with the charge
of other particles produced in p p-bar collisions at sqrt{s} = 1.8 TeV. Such
correlations are expected to arise from b quark hadronization and from B**
decays. We partially reconstruct B mesons using the semileptonic decays B0 ->
lepton D(*)- X. and B+ -> lepton D0-bar X$. From the oscillation frequency, we
obtain the mass difference between the two B0 mass eigenstates, Delta m_d =
0.471 {+0.078} {-0.068}(stat) +- 0.034 (syst) hbar ps-1, and measure the
efficiency and purity of this flavor tagging method for both charged and
neutral B mesons.


title: The DISTO First Level Trigger at SATURNE

abstract:
  The DISTO collaboration has built a large-acceptance magnetic spectrometer
designed to provide broad kinematic coverage of multi-particle final states
produced in $pp$ scattering. The spectrometer has been installed in the
polarized proton beam of the Saturne accelerator in Saclay to study
polarization observables in the $\vec{p} p \to p K^{+} \vec{Y}$ ($Y = \Lambda,
\Sigma^{0}$ or $Y^{*}$) reaction and vector meson production ($\phi, \omega$
and $\rho$) in $pp$ collisions.
  The common signature of such events is the multiplicity of four charged
particles in the final state.
  A flexible 1st level trigger which uses topological information from fast
detectors (scintillating fibers and hodoscope) has been built.
  It is completely software programmable through a menu-driven user interface
and allows switching between production and monitor triggers on successive beam
spills.


title: The DISTO Data Acquisition System at SATURNE

abstract:
  The DISTO collaboration has built a large-acceptance magnetic spectrometer
designed to provide broad kinematic coverage of multi-particle final states
produced in $pp$ scattering. The spectrometer has been installed in the
polarized proton beam of the Saturne accelerator in Saclay to study
polarization observables in the $\vec{p} p \to p K^{+} \vec{Y}$ ($Y = \Lambda,
\Sigma^{0}$ or $Y^{*}$) reaction and vector meson production ($\phi, \omega$
and $\rho$) in $pp$ collisions. The data acquisition system is based on a VME
68030 CPU running the OS/9 operating system, housed in a single VME crate
together with the CAMAC interface, the triple port ECL memories, and four RISC
R3000 CPU. The digitization of signals from the detectors is made by PCOS III
and FERA front-end electronics. Data of several events belonging to a single
Saturne extraction are stored in VME triple-port ECL memories using a hardwired
fast sequencer. The buffer, optionally filtered by the RISC R3000 CPU, is
recorded on a DLT cassette by DAQ CPU using the on-board SCSI interface during
the acceleration cycle. Two UNIX workstations are connected to the VME CPUs
through a fast parallel bus and the Local Area Network. They analyze a subset
of events for on-line monitoring. The data acquisition system is able to read
and record 3500 ev/burst in the present configuration with a dead time of 15%.


title: Comment on the review paper of Amsler

abstract:
  We present a dissenting view of some aspects of the work of the Crystal
Barrel collaboration.


title: Study of Semileptonic Decays of B Mesons to Charmed Baryons

abstract:
  Using data collected by the CLEO II detector at the center-of-mass energy on
or near the Upsilon(4S) resonance, we have determined the 90% confidence level
upper limit B(Bbar --> Lambda_c^+ e- X)/B(Bbar --> Lambda_c^+ X, Lambdabar_c^-
X) < 0.05 for electrons with momentum above 0.6 GeV/c. We have also derived the
ratio B(B^- --> Lambda_c^+ pbar e- nubar_e)/B(Bbar --> Lambda_c^+ pbar X) <
0.04 at the 90% confidence level and measured the ratio B(Bbar --> Lambda_c^+
pbar X)/B(Bbar --> Lambda_c^+ X, Lambdabar_c^- X) = 0.57 +- 0.05 +- 0.05.


title: Study of the $\eta\pi^o$ system in the mass range up to 1200 MeV

abstract:
  The reaction $\pi^-p \to \eta\pi^o n$ has been studied with GAMS-2000
spectrometer in the secondary 38 GeV/c $\pi^-$-beam of the IHEP U-70
accelerator. Partial wave analysis of the reaction has been performed in the
$\eta\pi^o$ mass range up to 1200 MeV. The $a_0(980)$-meson is seen as a sharp
peak in S-wave. The $t$-dependence of $a_0(980)$ production cross section has
been studied. Dominant production of the $a_0(980)$ at a small transfer
momentum $t$ confirms the hypothesis of Achasov and Shestakov about significant
contribution of the $\rho_2$ exchange ($I^GJ^{PC}=1^+2^{--}$) in the mechanism
of $a_0(980)$ meson production in $t$-channel of the reaction.


title: New Limits for Neutrinoless Tau Decays

abstract:
  Neutrinoless 3-prong tau lepton decays into a charged lepton and either two
charged particles or one neutral meson have been searched for using 4.79
fb^{-1} of data collected with the CLEO II detector at CESR. This analysis
represents an update of a previous study and the addition of six decay
channels. In all channels the numbers of events found are compatible with
background estimates and branching fraction upper limits are set for 28
different decay modes. These limits are either more stringent than those set
previously or represent the first attempt to find these decays.


title: Soft and Diffractive Phenomena

abstract:
  Recent results on hard diffraction at HERA and the Tevatron are presented.
Charged particle multiplicities in diffraction and differences in multiplicity
in quark and gluon jets measured at LEP are discussed. Spin effects in the
fragmentation of leading quarks show some interesting features.


title: The photon structure function measurements from LEP

abstract:
  The present knowledge of the structure of the photon based on measurements of
photon structure functions is discussed. This review covers QED structure
functions and the hadronic structure function F_2^gamma.


title:
Search for Supersymmetry with a dominant R-Parity violating LLE Coupling
  in e+e- Collisions at centre-of-mass energies of 130 to 172 GeV

abstract:
  A search for pair-production of supersymmetric particles under the assumption
that R-parity is violated via a dominant LLE coupling has been performed using
the data collected by ALEPH at centre-of-mass energies of 130-172 GeV. The
observed candidate events in the data are in agreement with the Standard Model
expectation. This is translated into lower limits on the mass of charginos,
neutralinos, sleptons, sneutrinos and squarks. For instance, charginos with
masses less than 73 GeV and neutralinos with masses less than 23 GeV are
excluded at 95% confidence level for any generation structure of the LLE
coupling, and for neutralino, slepton or sneutrino LSPs.


title: Improved Measurement of the Pseudoscalar Decay Constant $f_{D_{s}}$

abstract:
  We present a new determination of the Ds decay constant, f_{Ds} using 5
million continuum charm events obtained with the CLEO II detector. Our value is
derived from our new measured ratio of widths for Ds -> mu nu/Ds -> phi pi of
0.173+/- 0.021 +/- 0.031. Taking the branching ratio for Ds -> phi pi as (3.6
+/- 0.9)% from the PDG, we extract f_{Ds} = (280 +/- 17 +/- 25 +/- 34){MeV}. We
compare this result with various model calculations.


title:
Numerical Construction of Likelihood Distributions and the Propagation
  of Errors

abstract:
  The standard method for the propagation of errors, based on a Taylor series
expansion, is approximate and frequently inadequate for realistic problems. A
simple and generic technique is described in which the likelihood is
constructed numerically, thereby greatly facilitating the propagation of
errors.


title: Properties of the W boson

abstract:
  The properties of the W boson are reviewed. Particular emphasis is placed on
recent measurements from the LEP2 and Tevatron experiments.


title:
Measurements of Inclusive Lambda-bar Production with Large x_f at the
  SPS-Collider

abstract:
  We report results of inclusive measurements of anti-Lambda, produced in the
forward direction at the SPS with sqrt(s) = 630 GeV, using the UA8 small angle
Roman Pot spectrometers. These measurements cover the range in Feynman-x_f and
transverse momentum, 0.6 < x_f < 1.0 and 0.4 < p_t < 0.7 GeV, respectively.
Within a systematic uncertainty of +-20% on the absolute cross section
measurements, the results are indistinguishable from those made by some of us
in two earlier experiments at the CERN Intersecting Storage Rings, with
energies, sqrt(s) = 53 and 62 GeV. In the x_f-range, 0.6-0.9, the absolute
cross sections are lower by a factor of 2 to 3 than the predictions of the Lund
model as embodied in the PYTHIA 5.6 and JETSET 7.3 Monte Carlo programs,
indicating inadequacies in knowledge of the baryon fragmentation function. For
the largest x_f-range, 0.9-1.0, the measurements agree with the Monte Carlo
predictions. We have measured the average anti-Lambda polarization for our
events and find (6 +- 12%), consistent with previous measurements at the ISR in
the present region of x_f - p_t.


title: DIRC, a New Type of Particle Identification System for BABAR

abstract:
  The DIRC, a new type of Cherenkov imaging device, has been selected as the
primary particle identification system for the BABAR detector at the asymmetric
B-factory, PEP-II. It is based on total internal reflection and uses long,
rectangular bars made from synthetic fused silica as Cherenkov radiators and
light guides. In this paper, the principles of the DIRC ring imaging Cherenkov
technique are explained and results from the prototype program are presented.
The studies of the optical properties and radiation hardness of the quartz
radiators are described, followed by a discussion of the detector design.


title: Measurement of the t Distribution in Diffractive Photoproduction at HERA

abstract:
  Photon diffractive dissociation, $\gamma p \to Xp$, has been studied at HERA
with the ZEUS detector using $ep$ interactions where the virtuality $Q^2$ of
the exchanged photon is smaller than 0.02 GeV$^2$. The squared four-momentum
$t$ exchanged at the proton vertex was determined in the range $0.073<|t|<0.40$
GeV$^2$ by measuring the scattered proton in the ZEUS Leading Proton
Spectrometer. In the photon-proton centre-of-mass energy interval $176<W<225$
GeV and for masses of the dissociated photon system $4<M_X<32$ GeV, the $t$
distribution has an exponential shape, $dN/d|t| \propto \exp{(-b|t|)}$, with a
slope parameter $b=6.8 \pm 0.9$~(stat.)~$ ^{+1.2}_{-1.1}$~(syst.)~GeV$^{-2}$.


title: Elastic and Proton-Dissociative rho0 Photoproduction at HERA

abstract:
  Elastic and proton-dissociative rho0 photoproduction (gamma p-->rho0 p,gamma
p -->rho0 N,with rho0-->pi+pi-) has been studied in ep interactions at HERA for
gamma-p centre-of-mass energies in the range 50<W<100 GeV and for |t|<0.5 GeV2;
the results on the p-dissociative reaction are presented for masses of the
dissociated proton system in the range MN^2<0.1W^2.For the elastic process,the
pi+pi- invariant mass spectrum has been investigated as a function of t. As in
fixed target experiments, the rho0 resonance shape is asymmetric;this asymmetry
decreases with increasing |t|.The cross section has been studied as a function
of W; a fit to the resonant part with the form W^a gives a=0.16\pm0.06(stat.)
+0.11-0.15(syst.). The resonant part of the gamma p-->pi+pi- p cross section is
11.2\pm 0.1(stat.)+1.1-1.2 (syst.) mub at <W>=71.7 GeV. The t dependence of the
cross section can be described by a function of the type Ae^(-b|t|+ct^2) with
b=10.9\pm0.3(stat.)+1.0-0.5(syst.)GeV-2 and c=2.7\pm0.9(stat.)+1.9-1.7(syst.)
GeV-4. The t dependence has also been studied as a function of W and a value of
the slope of the pomeron trajectory 0.23\pm0.15(stat.)+0.10-0.07(syst.)GeV-2
has been deduced. The rho spin density matrix elements r^04_00,r^04_1-1 and
Re[r^04_10] have been measured and found to be consistent with expectations
based on SCHC. For p-dissociative pi+pi- photoproduction in the rho0 mass
range, the distributions of the two-pion invariant mass, W and the polar and
azimuthal angles of the pions in the helicity frame are the same within errors
as those for the elastic process. The t distribution has been fitted to an
exponential function with a slope parameter 5.8\pm0.3(stat.)\pm0.5(syst.)GeV-2.
The ratio of the elastic to p-dissociative rho0 photoproduction cross section
is 2.0\pm0.2(stat.)\pm0.7(syst.).


title:
Remarks on Muon $g-2$ Experiments and Possible CP Violation in
  $\pi\to\mu\to e$ Decay

abstract:
  The first experimental limit on CP violation in pi -> mu -> e decay is
extracted from published results of the CERN g-2 experiment.


title: The Search for Supersymmetry at the Tevatron Collider

abstract:
  We review the status of searches for Supersymmetry at the Tevatron Collider.
After discussing the theoretical aspects relevant to the production and decay
of supersymmetric particles at the Tevatron, we present the current results for
Runs Ia and Ib as of the summer of 1997. To appear in the book "Perspectives in
Supersymmetry", edited by G.L. Kane, World Scientific.


title:
Measurement of $Br(D^{0}\to K^{-}\pi^{+})$ using Partila Reconstruction
  of $\bar{B}\to D^{*+}X\ell^{-}\bar{\nu}$

abstract:
  We present a measurement of the absolute branching fraction for $D^0 -> K^-
pi^+$ using the reconstruction of the decay chain $Bbar -> D^{*+} X l^- nubar
$, $D^{*+} -> D^0 pi^+$ where only the lepton and the low-momentum pion from
the $D^{*+}$ are detected. With data collected by the CLEO II detector at the
Cornell Electron Storage Ring, we have determined $Br(D^0 -> K^- pi^+)= [3.81
+- 0.15(stat.) +- 0.16(syst.)]%$.


title:
Differential cross sections for pion charge exchange on the proton at
  27.5 MeV

abstract:
  We have measured pion single charge exchange differential cross sections on
the proton at 27.5 MeV incident $\pi^-$ kinetic energy in the center of
momentum angular range between $0^\circ$ and $55^\circ$. The extracted cross
sections are compared with predictions of the standard pion-nucleon partial
wave analysis and found to be in excellent agreement.


title:
Single - particle correlations in events with the total disintegration
  of nuclei

abstract:
  New experimental data on the behaviour of the single-particle two-dimensional
correlation functions R versus Q (Q is the number of nucleons emitted from nuc-
lei) and Ap (Ap is the mass of projectile nuclei) are presented in this paper.
The interactions of protons, d, 4He and 12C nuclei with carbon nuclei (at a
momentum of 4.2 A GeV/c) are considered.The values of R are obtained separately
for pi minus mesons and protons.In so doing,the values of R are normalized so
that -1=<R=<1.The value of R=0 corresponds to the case of the absence of corre-
lations.It has been found that the Q- and Ap-dependence of R takes place only
for weak correlations (R< 0.3).In the main (90 %),these correlations are con-
nected with the variable pt and have a nonlinear character, that is the regi-
ons with different characters of the Q-dependence of R are separated: there is
a change of regimes in the Q-dependences of R.The correlations weaken with
increasing Ap, and the variable R gets the least values of all the considered
ones in 12CC interactions.Simultaneously with weakening the correlations in the
region of large Q, the character of the Q-dependence of R changes.


title:
DEAR, FINUDA, KLOE: Kaonic Atoms, Hypernuclei and CP-Violation at the
  DAFNE Phi-Factory

abstract:
  Physics at DAFNE, the new Frascati e+e- machine, is reviewed, as well as the
esperiments: DEAR - search for KN exotic atoms, FINUDA - spectroscopy and
decays of hypernuclei, and KLOE - a multipurpose detector designed for
measuring direct CP violation in the K system.


title: Diffraction: QCD Effects in Colour Singlet Exchange

abstract:
  Measurements of diffractive phenomena observed at HERA and the Tevatron are
reviewed. A short introduction to the theoretical background is presented where
colour singlet exchange reactions are discussed and the diffractive
contribution and its interpretation via pomeron exchange outlined. The review
focuses on the current experimental directions at HERA and discusses exclusive
production of vector mesons, the dissociation of real photons and the deep
inelastic structure of diffraction. Complementary information obtained from
hadronic final states and jet structures is also discussed. The experimental
signatures for diffractive jet and $W^\pm$ production observed at the Tevatron
are described and the rates compared with those from the HERA experiments.


title: A Measurement of the W Boson Mass

abstract:
  We report a measurement of the W boson mass based on an integrated luminosity
of 82 pb$^{-1}$ from \ppbar collisions at $\sqrt{s}=1.8$ TeV recorded in
1994--1995 by the \Dzero detector at the Fermilab Tevatron. We identify W
bosons by their decays to $e\nu$ and extract the mass by fitting the transverse
mass spectrum from 28,323 W boson candidates. A sample of 3,563 dielectron
events, mostly due to Z to ee decays, constrains models of W boson production
and the detector. We measure $\mw=80.44\pm0.10(stat)\pm0.07(syst)$~GeV. By
combining this measurement with our result from the 1992--1993 data set, we
obtain $\mw=80.43\pm0.11$ GeV.


title: A Measurement of the W Boson Mass

abstract:
  We present a measurement of the W boson mass using data collected by the D0
experiment at the Fermilab Tevatron during 1994--1995. We identify W bosons by
their decays to $e\nu$ final states. We extract the W mass, M(W), by fitting
the transverse mass and transverse electron momentum spectra from a sample of
28,323 W to $e\nu$ decay candidates. We use a sample of 3,563 dielectron
events, mostly due to Z to ee decays, to constrain our model of the detector
response. From the transverse mass fit we measure M(W) =
$80.44\pm0.10(stat)\pm0.07(syst)$ GeV. Combining this with our previously
published result from data taken in 1992--1993, we obtain M(W) $= 80.43\pm0.11$
GeV.


title: Deep Inelastic Scattering at HERA

abstract:
  Results from the H1 and ZEUS experiments at HERA on deep inelastic scattering
are reviewed. The data lead to a consistent picture of a steep rise in the F_2
structure function and in the gluon density within the proton. Important new
information on the partonic structure of diffraction is emerging from H1 and
ZEUS. The space-like region in which the weak and electromagnetic interactions
become of equal strength is being explored for the first time. A possible
excess of events at high x and Q^2 compared to the expectations of the Standard
Model has been observed in both experiments.


title: Search for CP violation and b-->sg in inclusive B decays

abstract:
  We present preliminary results on two analyses performed by the SLD
Collaboration using inclusive B decays: a search for CP violation and a search
for the b --> sg transition.


title: Searches for heavy exotic states at the Tevatron

abstract:
  We present the results of searches for Standard Model Higgs, charged stable
massive particles, dijet mass resonances, and heavy neutral gauge bosons in
Tevatron ppbar collisions at sqrt s = 1.8 TeV using the CDF and D0 detectors.


title: Experimental Studies of Electroweak Physics

abstract:
  Some experimental new Electroweak physics results measured at the LEP/SLD and
the TEVATRON are discussed. The excellent accuracy achieved by the experiments
still yield no significant evidence for deviation from the Standard Model
predictions, or signal to physics beyond the Standard Model. The Higgs particle
still has not been discovered and a low bound is given to its mass.


title: Measurements of Hadronic Asymmetries in e+e- Collisions

abstract:
  High precision experimental new electroweak results measured at the four LEP
experiments and the SLD collaboration are discussed. Heavy quark (b b-bar and c
c-bar) forward-backward asymmetries measured at LEP are presented along with
polarized forward-backward and left-right asymmetries measured at SLD. The
results are compared, and the combined averages are used to evaluate the
Standard Model parameters.


title:
A study of the centrally produced 3pi channel in pp interactions at 450
  GeV/c

abstract:
  The reaction pp -> pf (pi+pi-pi0) ps has been studied at 450 GeV/c in an
experiment designed to search for gluonic states. A spin analysis has been
performed and the dPT filter applied. The analysis confirms the previous
observation that all undisputed qqbar states are suppressed at small dPT. In
addition, a clear difference is observed in the production mechanism for the
eta and omega.


title:
Calibrating the energy of a 50 X 50 GeV muon collider using spin
  precession

abstract:
  The neutral Higgs boson is expected to have a mass in the region 90-150 GeV
in various schemes within the Minimal Supersymmetric extension to the Standard
Model. A first generation Muon Collider is uniquely suited to investigate the
mass, width and decay modes of the Higgs boson, since the coupling of the Higgs
to muons is expected to be strong enough for it to be produced in the s channel
mode in the muon collider. Due to the narrow width of the Higgs, it is
necessary to measure and control the energy of the individual muon bunches to a
precision of a few parts in a million. We investigate the feasibility of
determining the energy scale of a muon collider ring with circulating muon
beams of 50 GeV energy by measuring the turn by turn variation of the energy
deposited by electrons produced by the decay of the muons. This variation is
caused by the existence of an average initial polarization of the muon beam and
a non-zero value of g-2 for the muon. We demonstrate that it is feasible to
determine the energy scale of the machine with this method to a few parts per
million using data collected during 1000 turns.


title: Status of the KTeV Experiment at Fermilab

abstract:
  The KTeV experiment is a fixed target experiment at Fermilab. Its primary
goal is the search for direct CP violation in the decay of neutral kaons. Its
current status and some preliminary results will be discussed.


title: Crystal Barrel Results on Two-Body Decays of the Scalar Glueball

abstract:
  The Crystal Barrel Collaboration observes scalar meson resonances in $\bar p
p$ annihilation. Based on the measurements and partial wave analyses these are
candidates for the $^3$P$_0$ groundstate nonet. The supernummerary $f_0(1500)$
resonance is identified as a scalar groundstate glueball. Important information
for its characterization comes from the decay pattern into pseudoscalar and
scalar mesons. Data on kaonic decays in the mass region up to 1700 MeV are now
avaible at Crystal Barrel. New analysis results are presented.


title:
KARMEN Limits on nu_e -> nu_tau Oscillations in 2-neutrino and
  3-neutrino Mixing Schemes

abstract:
  The 56 tonne high resolution liquid scintillation calorimeter KARMEN at the
beam stop neutrino source ISIS has been used to search for neutrino
oscillations in the disappearance channel nu_e->x. The nu_e emitted in mu+
decay at rest are detected with spectroscopic quality via the exclusive charged
current reaction 12-C(nu_e,e-)12-N_g.s. almost free of background. Analysis of
the spectral shape of e- from the nu_e induced reaction as well as a
measurement of the absolute nu_e flux allow to investigate oscillations of the
type nu_e->nu_tau and nu_e->nu_mu . The flux independent ratio R(CC/NC) of
charged current events 12-C(nu_e,e-)12-N_g.s. to neutral current events
12-C(nu,nu')12-C* provides additional information in the oscillation channel
nu_e->x . All three analysis methods show no evidence for oscillations. For the
nu_e->nu_tau channel 90%CL limits of sin^2(2t)<0.338 for dm^2>100eV^2 and
dm^2<0.77eV^2 for maximal mixing in a simple 2 flavor oscillation formalism are
derived. A complete 3 flavor analysis of the experimental data from five years
of measurement with respect to nu_e<->nu_tau and nu_e<->nu_mu mixing is
presented.


title: Pion and Kaon Polarizabilities and Radiative Transitions

abstract:
  CERN COMPASS plans measurements of gamma-pi and gamma-K interactions using
50-280 GeV pion (kaon) beams and a virtual photon target. Pion (kaon)
polarizabilities and radiative transitions will be measured via Primakoff
effect reactions such as pi+gamma->pi'+gamma and pi+gamma->meson. The former
can test a precise prediction of chiral symmetry; the latter for
pi+gamma->a1(1260) is important for understanding the polarizability. The
radiative transition of a pion to a low mass two-pion system, pi+gamma->pi+pi0,
can also be studied to measure the chiral anomaly amplitude F(3pi)
(characterizing gamma->3pi), arising from the effective Chiral Lagrangian. We
review here the motivation for the above physics program. We describe the beam,
target, detector, and trigger requirements for these experiments. We also
describe FNAL SELEX attempts to study related physics via the interaction of
600 GeV pions with target electrons. Data analysis in progress aims to identify
the reactions pi+e->pi'+e'+pi0 related to the chiral anomaly, and
pi+e->pi'+e'+gamma related to pion polarizabilities.


title: Large Natural Cherenkov Detectors: Water and Ice

abstract:
  In this review we first address two questions:
  1. Why do we need kilometer-scale muon and neutrino detectors?
  2. What do we learn from the operating Baikal and AMANDA detectors about the
construction of kilometer-scale detectors?
  I will subsequently discuss the challenges for building the next-generation
detectors. The main message is that these are different, in fact less ominous,
than for commissioning the present, relatively small, detectors which must
reconstruct events far outside their instrumented volume in order to achieve
large effective telescope area.


title:
Measurement of the Branching Ratios for the Decays of $D_{s}^{+}\to
  \eta\pi^{+}, \eta^{'}\pi^{+}, \eta\rho^{+}$, and $eta^{'}\rho^{+}$

abstract:
  Using a data sample with integrated luminosity of about 3.9 fb^{-1} collected
in e+ e- annihilation with the CLEO-II detector at the Cornell Electron Storage
Ring, we have measured the branching ratios for the decay modes Ds -> (eta,
eta') pi and Ds -> (eta, eta') rho relative to Ds -> phi pi. These decay modes
are among the most common hadronic decays of the Ds's and can be related by
factorization to the semileptonic decays Ds -> (eta,eta') l nu. The results
obtained are compared with previous CLEO results and with the branching ratios
measured for the related semileptonic decays. We also report results on the
Cabibbo-suppressed decays of the D+ to the same final states.


title:
Primakoff Physics for CERN COMPASS Hadron Beam: Hadron Polarizabilities,
  Hybrid Mesons, Chiral Anomaly, Meson Radiative Transitions

abstract:
  We describe a hadron physics program attainable with a partially instrumented
CERN COMPASS spectrometer, involving tracking detectors and moderate-size
ECAL2/HCAL2 calorimeters. COMPASS can realize a state-of-the-art hadron beam
physics program based on hadron polarizability, hybrid mesons, chiral anomaly,
and meson radiative transition studies. We review here the physics motivation
for this hadron beam program. We describe the beam, detector, trigger
requirements, and hardware/software requirements for this program. The triggers
for all this physics can be implemented for simultaneous data taking. The
program is based on using a hadron beam (positive/negative pion, kaon, proton)
in COMPASS.


title:
Two-Body B Meson Decays to $\eta$ and $\eta^{'}$ -- Observation of $B\to
  \eta${'}K$

abstract:
  In a sample of 6.6 million produced B mesons we have observed decays B ->
eta' K, with branching fractions BR(B+ -> eta' K+ = 6.5 +1.5 -1.4 +- 0.9) x
$10^{-5}$ and BR(B0 -> eta' K0 = 4.7 +2.7 -2.0 +- 0.9) x $10^{-5}$. We have
searched with comparable sensitivity for 17 related decays to final states
containing an eta or eta' meson accompanied by a single particle or low-lying
resonance. Our upper limits for these constrain theoretical interpretations of
the B -> eta' K signal.


title: PL3: Structure Functions

abstract:
  Recent measurements of unpolarised and polarised nucleon structure functions
and F_2(gamma) are reviewed. The implications for QCD and the gluon momentum
distribution are discussed. The status of the understanding of the total
virtual-photon proton total cross-section in the transition region between real
photoproduction and deep-inelastic scattering is summarised briefly.


title: Measurement of the Top Quark Mass

abstract:
  We present a measurement of the top quark mass using a sample of t-tbar
decays into an electron or a muon, a neutrino, and four jets. The data were
collected in p-pbar collisions at sqrt(s)=1.8 TeV with the Collider Detector at
Fermilab and correspond to an integrated luminosity of 109 pb^-1. We measure
the top quark mass to be 175.9 +/- 4.8(stat.) +/- 4.9(syst.) GeV/c^2.


title: Search for narrow pbar p resonances in the reaction pbar p>pbar p pi+pi-

abstract:
  The reaction pbar p -> pbar p pi+ pi- has been studied with high statistics
at CERN-LEAR with incident pbar momenta from 1.65 to 2.0 GeV/c by the JETSET
(PS202) experiment. The aim of this paper is to search for narrow resonances
decaying to pbar p. No evidence for such structures is found. In particular, an
upper limit for the production of a 2.02 GeV state with a width of Gamma = 20
MeV, having been seen in other hadroproduction experiments, is established. Our
results restrict the cross section for such a peak to be below 200 nb at the
95% confidence level.


title: Rare and Forbidden Kaon Decays at the AGS

abstract:
  An overview of the Rare Kaon Decay program at the AGS is presented, with
particular emphasis on the three major experiments currently running and
analyzing data. A brief review of earlier kaon decay experiments and of recent
improvements in AGS performance is provided. This review concludes with a
discussion of proposed and developing experiments planned to run in the year
2000 and beyond (AGS2000).


title: Structure Function Measurements and Kinematic Reconstruction at HERA

abstract:
  The procedure used for structure function measurements at HERA is briefly
described and related to the properties of kinematic reconstruction. The
reconstruction methods of the inclusive deep inelastic scattering variables are
reviewed and their sensitivity to the energy and angle miscalibrations are
discussed in detail. New prescriptions are introduced and related to the
standard methods in order to optimize the F_2 structure function measurement
over the widest kinematic range, both in the low x, low Q^2 and in the high x,
high Q^2 regions. The prospects for the future high Q^2 studies are briefly
discussed.


title:
Improving Measurements of the CKM Phase $\gamma$ Using Charm Factory
  Results

abstract:
  Several authors have proposed methods to measure the phase $\gamma$ of the
Cabibbo-Kobayashi-Maskawa (CKM) unitarity triangle using decays of the type
$B\to DK$. We show how to remove uncertainties from these measurements and
increase their sensitivity by measuring CP-conserving phases at a charm
factory.


title:
Searches for New Physics in Diphoton Events in proton anti-proton
  collisions at sqrt(s)=1.8TeV

abstract:
  We have searched for anomalous production of missing E$_{\rm T}$ ($\mett$),
jets, leptons ($e, \mu, \tau$), $b$-quarks, or additional photons in events
containing two isolated, central \mbox{($|\eta|<1.0$)} photons with
\mbox{$\Et>12$~GeV}. The results are consistent with standard model
expectations, with the possible exception of one event that has in addition to
the two photons a central electron, a high-E$_{\rm T}$ electromagnetic cluster,
and large $\mett$. We set limits using two specific SUSY scenarios for
production of diphoton events with $\mett$.


title: A Disoriented Chiral Condensate Search at the Fermilab Tevatron

abstract:
  MiniMax (Fermilab T-864) was a small test/experiment at the Tevatron designed
to search for disoriented chiral condensates (DCC) in the forward direction.
The MiniMax detector at the C0 collision region of the Tevatron was a telescope
of 24 multi-wire proportional chambers (MWPC's) with a lead converter behind
the eighth MWPC, allowing the detection of charged particles and photon
conversions in an acceptance approximately a circle of radius 0.6 in
pseudorapidity-azimuthal-angle space, centered on a pseudorapidity of about 4.
  The use of standard Monte Carlo simulations (PYTHIA, GEANT) is described,
along with the simulation created by the MiniMax Collaboration to generate DCC
domains. A description of the data analysis software is given, including
detailed studies of its performance on data from the simulations.
  A set of robust observables is derived. These are insensitive to many
efficiencies and to the details of the modeling of the parent pion production
mechanisms, yet have distinguishable values for DCC and generic charged-neutral
distributions. Simulations show that the robust observables are insensitive to
detector efficiencies and to systematic errors in the data analysis software.
  The resulting values for robust observables for approximately 1.5 million
events are shown to be consistent with production by only generic mechanisms.
Results from samples of diffractive-tagged events and of high-multiplicity
events also show no evidence for DCC.


title: FELIX A full acceptance detector at the LHC

abstract:
  The FELIX collaboration has proposed the construction of a full acceptance
detector for the LHC, to be located at Intersection Region 4, and to be
commissioned concurrently with the LHC. The primary mission of FELIX is QCD: to
provide comprehensive and definitive observations of a very broad range of
strong-interaction processes. This paper reviews the detector concept and
performance characteristics, the physics menu, and plans for integration of
FELIX into the collider lattice and physical environment. The current status of
the FELIX Letter of Intent is discussed.


title: Investigation of CP violation in B^0 -> J/psi K^0_S decays at LEP

abstract:
  An investigation of CP violation was performed using a total of 24 candidates
for B^0 -> J/psi K^0_S decay, with a purity of about 60%. These events were
selected from 4.4 million hadronic Z^0 decays recorded by the OPAL detector at
LEP. An analysis procedure, involving techniques to reconstruct the proper
decay times and tag the produced b-flavours, B^0 or B^0(bar), has been
developed to allow a first direct study of the time dependent CP asymmetry
that, in the Standard Model, is sin(2beta). The result is sin(2beta) =
3.2_{-2.0}^{+1.8} +/- 0.5, where the first error is statistical and the second
systematic. This result is used to determine probabilities for different values
of sin(2beta) in the physical region from -1 to +1.


title: Search for T-violation in kmu3 decay

abstract:
  We have designed a new experiment (E923) at the BNL-AGS to search for the
T-violating polarization of the muon normal to the decay plane of the KMU3
decay. The experiment aims to search for T-violation beyond the Standard Model;
such a search is motivated by the need for a stronger CP violation source to
account for the baryon asymmetry of the Universe.
  The experiment will be performed with in-flight decays from an intense
(2.10e7 K/sec) 2 GeV/c separated K+ beam in an existing beam-line at the AGS.
We expect to analyze more than 10e9 events to obtain the sensitivity of (delta
P_t = +-0.00013) at 1 sigma, corresponding to the sensitivity of +-0.0007 to
Im(xi), an improvement by 40 over the present limit on the same measurement.
This paper describes the motivation for this experiment as well as other
measurements of the same type. The experimental technique and the sensitivity
is also described.


title:
Search for Anomalous Production of Photonic Events with Missing Energy
  in e+e- Collisions at sqrt{s} = 130-172 GeV

abstract:
  Photonic events with large missing energy have been observed in e+e-
collisions at centre-of-mass energies of 130, 136, 161 and 172 GeV using the
OPAL detector at LEP. Results are presented based on search topologies designed
to select events with a single photon and missing transverse energy or events
with a pair of acoplanar photons. In both search topologies, cross-section
measurements are performed within the kinematic acceptance of the selection.
These results are compared with the expectations from the Standard Model
processes e+e- -> nu nu(bar) gamma (gamma) (single-photon) and e+e- -> \nu
\nu(bar) gamma gamma (gamma) (acoplanar-photons). No evidence is observed for
new physics contributions to these final states. Upper limits on sigma(e+e- ->
XY)*Br(X -> Y gamma) and sigma(e+e- -> XX)*Br**2(X -> Y gamma) are derived for
the case of stable and invisible Y. These limits apply to single and pair
production of excited neutrinos (X = \nu^*, Y = \nu), to neutralino production
(X = \chi^0_2, Y = \chi^0_1), and to supersymmetric models in which X =
\chi^0_1 and Y = \tilde{G} is a light gravitino. For the latter scenario, the
results of the acoplanar-photons search are used to provide model-dependent
lower limits on the mass of the lightest neutralino.


title: Direct Measurement of the Top Quark Mass at D0

abstract:
  We determine the top quark mass m_t using t-tbar pairs produced in the D0
detector by \sqrt{s} = 1.8 TeV p-pbar collisions in a 125 pb^-1 exposure at the
Fermilab Tevatron. We make a two constraint fit to m_t in t-tbar -> b W^+bbar
W^- final states with one W boson decaying to q-qbar and the other to e-nu or
mu-nu. Likelihood fits to the data yield m_t(l+jets) = 173.3 +- 5.6 (stat) +-
5.5 (syst) GeV/c^2. When this result is combined with an analysis of events in
which both W bosons decay into leptons, we obtain m_t = 172.1 +- 5.2 (stat) +-
4.9 (syst) GeV/c^2. An alternate analysis, using three constraint fits to fixed
top quark masses, gives m_t(l+jets) = 176.0 +- 7.9 (stat) +- 4.8 (syst)
GeV/C^2, consistent with the above result. Studies of kinematic distributions
of the top quark candidates are also presented.


title: Search for the B_c Meson in Hadronic Z^0 Decays

abstract:
  A search for decays of the B_c meson was performed using data collected from
1990-1995 with the OPAL detector on or near the Z peak at LEP. The decay
channels B_c^+ -> J/psi pi^+, B_c^+ -> J/psi a_1^+ and B_c^+ -> J/psi ell^+ nu
were investigated, where ell denotes an electron or a muon. Two candidates are
observed in the mode B_c^+ -> J/psi pi^+, with an estimated background of (0.63
+/- 0.20) events. The weighted mean of the masses of the two candidates is
(6.32 +/- 0.06) GeV/c^2, which is consistent with the predicted mass of the B_c
meson. One candidate event is observed in the mode B_c^+ -> J/psi ell^+ nu with
an estimated background of (0.82 +/- 0.19) events. No candidate events are
observed in the B_c^+ -> J/psi a_1^+ decay mode, with an estimated background
of (1.10 +/- 0.22) events. Upper bounds at the 90% confidence level are set on
the production rates for these processes.


title: Search for the Decay b -> X_s mu+ mu-

abstract:
  We have searched for the flavor-changing neutral current decay b -> s mu+ mu-
in p pbar collisions at sqrt(s) = 1.8 TeV with the DO detector at Fermilab. We
determine the 90% confidence level limit for the branching fraction to be B(b
-> X_s mu+ mu-) < 3.2 x 10^{-4}. We argue that this limit is more stringent
than the best published limit on this decay rate.


title: $b \to c$ Hadronic Decays

abstract:
  A review of current experimental results on exclusive hadronic decays of
bottom mesons to a single or double charmed final state is presented. We
concentrate on branching fraction measurements conducted at $e^+e^-$ colliders
at the $\Upsilon(4s)$ and at the $Z^0$ resonance. The experimental results
reported are then used in tests of theoretical model predictions, the
determination of the QCD parameters $a_1$ and $a_2/a_1$ and tests of
factorization


title: Measurement of the one-prong hadronic tau branching ratios at LEP

abstract:
  The branching ratios of the \tau^- -> h^- \nu_\tau, \tau^- -> h^- \pi^0
\nu_\tau, \tau^- -> h^- >=2 \pi^0 \nu_\tau decays have been measured using the
1991-1995 data recorded with the OPAL detector at LEP. These branching ratios
are measured simultaneously using three selection criteria and are found to be
  BR(\tau^- -> h^- \nu_\tau) = (11.98 +/- 0.13 +/- 0.16)%
  BR(\tau^- -> h^- \pi^0 \nu_\tau) = (25.89 +/- 0.17 +/- 0.29)%
  BR(\tau^- -> h^- >=2 \pi^0 \nu_\tau) = ( 9.91 +/- 0.31 +/- 0.27)%
  where the first error is statistical and the second is systematic.


title: b-Quark Physics at DORIS

abstract: b-Quark Physics at DORIS


title: Measurements of the B^0_s and \Lambda_b Lifetimes

abstract:
  This paper presents updated measurements of the lifetimes of the B^0_s meson
and the \Lambda_b baryon using 4.4 million hadronic Z^0 decays recorded by the
OPAL detector at LEP from 1990 to 1995. A sample of B^0_s decays is obtained
using D_s^- \ell^+ combinations, where the D_s^- is fully reconstructed in the
\phi \pi^-, K^*0 K^- and K^- K^0_S decay channels and partially reconstructed
in the \phi \ell^- \nu(bar) X decay mode. A sample of \Lambda_b decays is
obtained using \Lambda_c^+ \ell^- combinations, where the \Lambda_c^+ is fully
reconstructed in its decay to a p K^- \pi^+ final state and partially
reconstructed in the \Lambda \ell^+ \nu X decay channel. From 172 +/- 28 D_s^-
\ell^+ combinations attributed to B^0_s decays, the measured lifetime is
  \tau(B^0_s) = 1.50 +0.16 -0.15 +/- 0.04 ps,
  where the errors are statistical and systematic, respectively. From the 129
+\- 25 \Lamda_c^+ \ell^- combinations attributed to \Lambda_b decays, the
measured lifetime
  \tau(\Lambda_b) = 1.29 +0.24 -0.22 +/- 0.06 ps,
  where the errors are statistical and systematic, respectively.


title: Physics goals and parameters of photon colliders

abstract:
  Linear colliders offer a unique possibility to study gamma gamma and gamma
electron interactions at the energies 0.1--2 TeV. This option is now included
in design reports of NLC, JLC and TESLA/SBLC. This paper includes: status of
photon colliders, new possibilities in study of Higgs boson, ways to achieve
high luminosities.

categories: hep-ex hep-ph physics.acc-ph physics.optics


title:
Search for charged Higgs bosons in e^+e- collisions at sqrt{s} = 130 -
  172 GeV

abstract:
  A search is described to detect charged Higgs bosons via the process e^+e^-
-> H^+H^-, using data collected by the OPAL detector at center-of-mass energies
of 130-172 GeV with a total integrated luminosity of 25 pb^-1. The decay
channels are assumed to be H^+ -> qq'(bar) and H^+ -> \tau^+ \nu_{\tau}. No
evidence for charged Higgs boson production is observed. The lower limit for
its mass is determined to be 52 GeV at 95% confidence level, independent of the
H^+ -> \tau^+ \nu_{\tau} branching ratio.


title: Electroweak and Heavy Flavor Physics at SLD

abstract:
  We review recent electroweak and B physics results obtained in polarized e+e-
interactions at the SLC by the SLD experiment. Unique and precise measurements
of the electroweak parameters Ae, Ab, Ac, Rb and Rc provide powerful
constraints on the Standard Model. The excellent 3-D vertexing capabilities of
SLD are further exploited to extract precise B+ and B0 lifetimes, as well as
measurements of the time evolution of B0-B0-bar mixing.


title:
Perspectives on Supersymmetry: The Search for Supersymmetry at the
  Tevatron Collider

abstract:
  A review of the status of searches for Supersymmetry at the Tevatron Collider
as of the Summer of 1997. This is a new version of the previous review,
substantially shortened to fit editorial guidelines, and significantly
different to warrant a separate posting. To appear in "Perspectives on
Supersymmetry", ed. G.L. Kane (World Scientific, Singapore).


title:
Double Beta Decay and Dark Matter Search - Window to New Physics now,
  and in future (GENIUS)

abstract:
  Nuclear double beta decay provides an extraordinarily broad potential to
search for beyond Standard Model physics, probing already now the TeV scale, on
which new physics should manifest itself. These possibilities are reviewed
here. First, the results of present generation experiments are presented. The
most sensitive one of them -- the Heidelberg-Moscow experiment in the Gran
Sasso -- probes the electron mass now in the sub eV region and will reach a
limit of $\sim$ 0.1 eV in a few years. Basing to a large extent on the
theoretical work of the Heidelberg Double Beta Group in the last two years,
results are obtained also for SUSY models (R-parity breaking, sneutrino mass),
leptoquarks (leptoquark-Higgs coupling), compositeness, right-handed W boson
mass and others. These results are comfortably competitive to corresponding
results from high-energy accelerators like TEVATRON, HERA, etc. Second, future
perspectives of $\beta\beta$ research are discussed. A new Heidelberg
experimental proposal (GENIUS) is presented which would allow to increase the
sensitivity for Majorana neutrino masses from the present level of at best 0.1
eV down to 0.01 or even 0.001 eV. Its physical potential would be a
breakthrough into the multi-TeV range for many beyond standard models. Its
sensitivity for neutrino oscillation parameters would be larger than of all
present terrestrial neutrino oscillation experiments and of those planned for
the future. It could probe directly the atmospheric neutrino problem and even
the large angle solution of the solar neutrino problem. It would further,
already in a first step, cover almost the full MSSM parameter space for
prediction of neutralinos as cold dark matter, making the experiment
competitive to LHC in the search for supersymmetry.


title:
Determination of the Production Rate of D^*0 Mesons and of the Ratio
  V/(V+P) in Z^0 -> cc(bar) Decays

abstract:
  In e^+e^- collisions at centre-of-mass energies around 91 GeV, D^*0 mesons
have been reconstructed using data collected with the OPAL detector at LEP. The
hadronisation fraction has been measured to be
  f(c -> D^*0) = 0.218 +/- 0.054 +/- 0.045 +/- 0.007,
  where the errors correspond to the statistical and systematic errors specific
to this analysis, and to systematic uncertainties from externally measured
branching fractions, respectively. Together with previous OPAL measurements of
the hadronisation fractions of other charmed mesons, this value is used to
investigate the relative production of observed vector and pseudoscalar charmed
mesons in Z^0 -> cc(bar) decays. The production ratio is determined to be
  P^eff_V = V/(V+P) = 0.57 +/- 0.05.
  The relative primary production of vector and pseudoscalar mesons, P^prim_V,
is studied in the context of the production and decay of orbitally excited
charmed resonances. The first measurement of the inclusive D^*+_s production
rate in hadronic Z^0 decays is presented.


title: Compton Polarimetry at a TEV Collider

abstract:
  An electron beam polarization of 80% or greater will be a key feature of a 1
TeV Linear Collider. Accurate measurements of the beam polarization will
therefore be needed. We discuss design considerations and capabilities for a
Compton-scattering polarimeter located in the extraction line from the
Interaction Point. Polarization measurements with 1% accuracy taken parasitic
to collision data look feasible, but detailed simulations are needed.
Polarimeter design issues are similar for both electron-positron and
electron-electron collider modes, though beam disruption creates more
difficulties for the electron-electron mode.


title: Supersymmetry at the Tevatron ?

abstract:
  These lectures contain an introduction to the search for supersymmetry at
hadron colliders. The Tevatron is one of high-energy physics most sophisticated
tools. The high center-of-mass energy of its proton-antiproton collisions makes
it an ideal place to search for physics beyond the Standard Model, such as
supersymmetry. Two experiments, CDF and D\O, completed a long data taking
period in summer of 1995, yielding over $100 p b^{-1}$ of proton-- antiproton
interactions. The data recorded by the experiments are still being analysed.
The lectures outline the strategies in the search for supersymmetry at the
Tevatron and examine the major analyses in detail. Results obtained by the two
experiments are included where available.


title: Upper Limit on the Decay K+ --> e+ nu mu+ mu-

abstract:
  An upper limit on the branching ratio for the decay K+ --> e+ nu mu+ mu- is
set at 5.0 x 10^{-7} at 90% confidence level, consistent with predictions from
chiral perturbation theory.


title: High-E_T Inclusive Jet Cross Sections in Photoproduction at HERA

abstract:
  Inclusive jet differential cross sections for the reaction e+ p --> e+ + jet
+ X with quasi-real photons have been measured with the ZEUS detector at HERA.
These cross sections are given for the photon-proton centre-of-mass energy
interval 134 < W < 277 GeV and jet pseudorapidity in the range -1 < eta(jet) <
2 in the laboratory frame. The results are presented for three cone radii in
the eta-phi plane, R=1.0, 0.7 and 0.5. Measurements of dsigma/deta(jet) above
various jet-transverse-energy thresholds up to 25 GeV and in three ranges of W
are presented and compared to next-to-leading order (NLO) QCD calculations. For
jets defined with R=1.0 differences between data and NLO calculations are seen
at high eta(jet) and low E_T(jet). The measured cross sections for jets defined
with R=0.7 are well described by the calculations in the entire measured range
of eta(jet) and E_T(jet). The inclusive jet cross section for E_T(jet) > 21 GeV
is consistent with an approximately linear variation with the cone radius R in
the range between 0.5 and 1.0, and with NLO calculations.


title: Production of f_0(980), f_2(1270) and \phi(1020) in hadronic Z^0 decay

abstract:
  Inclusive production of the f_0(980), f_2(1270) and \phi(1020) resonances has
been studied in a sample of 4.3 million hadronic Z^0 decays from the OPAL
experiment at LEP. A coupled channel analysis has been used for the f_0 in
simultaneous fits to the resonances in inclusive \pi+\pi- and K+K- mass
spectra. Fragmentation functions are reported for the three states. Total
inclusive rates are measured to be 0.141 +/- 0.007 +/- 0.011 f_0, 0.155 +/-
0.011 +/- 0.018 f_2, and 0.091 +/- 0.002 +/- 0.003 \phi mesons per hadronic Z^0
decay. The production properties of the f_0, including those in three-jet
events, are compared with those of the f_2 and \phi, and with the Lund string
model of hadron production. All measurements are consistent with the hypothesis
that the f_0 is a conventional qq(bar) scalar meson.


title: BNL Future Plans

abstract:
  I discuss the prospects for a fixed target physics program at the AGS in the
RHIC era.


title:
Search for an Excess in the Production of Four-Jet Events from e^+e^-
  Collisions at \sqrt{s} = 130-184 GeV

abstract:
  Events with four distinct jets from e^+e^- collisions, collected by the OPAL
detector at centre-of-mass energies between 130 and 184 GeV, are analysed for a
peak in the sum of dijet masses. This search is motivated by the ALEPH
Collaboration's observation of a clear excess of events with dijet mass sums
close to 105 GeV in data taken at centre-of-mass energies of 130 and 136 GeV in
1995. We have observed no significant excess of four-jet events compared to the
Standard Model expectation for any dijet mass sum at any energy. Our
observation is inconsistent with the excess observed by ALEPH in 1995. Upper
limits are determined on the production cross-section as a function of the
dijet mass sum.


title: Study of the reaction pbar p -> phi phi from 1.1 to 2.0 GeV/c

abstract:
  A study has been performed of the reaction pbar p -> 4K using in-flight
antiprotons from 1.1 to 2.0 GeV/c incident momentum interacting with a hydrogen
jet target. The reaction is dominated by the production of a pair of phi
mesons. The pbar p -> phi phi cross section rises sharply above threshold and
then falls continuously as a function of increasing antiproton momentum. The
overall magnitude of the cross section exceeds expectations from a simple
application of the OZI rule by two orders of magnitude. In a fine scan around
the xi/f_J(2230) resonance, no structure is observed. A limit is set for the
double branching ratio B(xi -> pbar p) * B(xi -> phi phi) < 6e-5 for a spin 2
resonance of M = 2.235 GeV and Width = 15 MeV.


title:
Measurement of the top quark mass and top-antitop production cross
  section from dilepton events at the Collider Detector at Fermilab

abstract:
  We present an analysis of dilepton events originating from top-antitop
production in proton-antiproton collisions at sqrt{s}=1.8 TeV at the Fermilab
Tevatron Collider. The sample corresponds to an integrated luminosity of 109+-7
pb^{-1}. We observe 9 candidate events, with an estimated background of
2.4+-0.5 events. We determine the mass of the top quark to be M_top =
161+-17(stat.)+-10(syst.) GeV/c^2. In addition we measure a top-antitop
production cross section of 8.2+4.4-3.4 pb (where M_top = 175 GeV/c^2 has been
assumed for the acceptance estimate).


title: Heavy Quarks at the Tevatron: Top & Bottom

abstract:
  We review the status of heavy quark physics at the Fermilab Tevatron collider
by summarizing recent top quark and B physics results from CDF and DO. In
particular, we discuss the measurement of the top quark mass and top production
cross section as well as B meson lifetimes and time dependent B0 B0= mixing
results.


title: Present Status and Future of DCC Analysis

abstract:
  Disoriented Chiral Condensates (DCC) have been predicted to form in high
energy heavy ion collisions where the approximate chiral symmetry of QCD has
been restored. This leads to large imbalances in the production of charged to
neutral pions. Sophisticated analysis methods are being developed to
disentangle DCC events out of the large background of events with
conventionally produced particles. We present a short review of current
analysis methods and future prospects.


title:
Inverses of slopes of invariant inclusive spectra of emitted protons and
  pi minus mesons in 4HeC and 12CC interactions with the total disintegration
  of nuclei

abstract:
  The ideas that extreme states of nuclear matter arise in events with total
dis- integration of nuclei (TDN) and as these states arise, the properties of
events qualitatively change with the number of protons emitted from the nucleus
Q,star- ting from its certain boundary numbe Q*,are used in this paper for the
experi- mentally search for extreme states of nuclear matter. For realization
of these ideas, the invariant inclusive spectra of protons and pi minus mesons
as a func- tion of their kinetic energies T in the lab. system for 4HeC and
12CC interacti- ons at the momentum 4.2 A GeV/c with different values of Q are
used. The spect- ra are fitted by the exponential expressions and the
Q-dependencies of the in- verses of slopes Ti are studied. It is found that
these spectra have two compo- nents and contain the regime change points .In
the TDN region the values of Ti for pi minus mesons begin to increase with
increasing the number of protons. We consider this increasing to be a signal
from the extreme states of nuclear mat- ter. The value of the "temperature" of
these states is about 0.140 GeV.


title:
The observation of collective effects in central C-Ne and C-Cu
  collisions at a momentum of 4.5 GeV/c per nucleon

abstract:
  The transverse momentum technique is used to analyse charged-particle
exclusive data in the central C-Ne and C-Cu interactions at a momentum of 4.5
Gev/c per nucleon.The results are presented in terms of the mean transverse
momentum per nucleon projected onto the estimated reaction plane <P_{x}(Y)> as
a function of the rapidity Y in the laboratory system. The observed dependence
shows the typical S-shape behaviour reflecting the presence of flow effects.
The value of flow F is obtained that increases with the atomic number of the
target. The Monte Carlo cascade Quark Gluon String Model (QGSM) is used for the
comparison with the experimental data. The QGSM reproduces the spectra and the
mean kinematical characteristics of the protons (<Y>....<N_{p}>) but
underestimates their transverse flow.


title: Continuum Charged $D^{*}$ Spin Alignment at $sqrt{s}$ = 10.5 GeV

abstract:
  A measurement of the spin alignment of charged D^* mesons produced in
continuum e^+ e^- \to c \bar{c} events at \sqrt{s}=10.5 GeV is presented. This
study using 4.72 fb^{-1} of CLEO II data shows that there is little evidence of
any D^* spin alignment.


title:
First Observation of the Cabibbo Suppressed Decay $B^{+}\to
  \bar{D}^{0}K^{+}$

abstract:
  We have observed the decay of the $B^-$ meson into $D^0 K^-$, using 3.3
million $B\bar B$ pairs collected with the CLEO II detector at the Cornell
Electron Storage Ring. We find the branching fractions of this decay to be
suppressed relative to the decay into $D^0 \pi^-$ by $0.055 \pm 0.014 \pm
0.005$.


title: The Hadronic Transitions $Upsilon(2S)\to Upsilon(1S)$

abstract:
  Using a data sample of $\Upsilon(2S)$ events collected with the CLEO II
detector at the Cornell Electron Storage Ring, we have investigated the
hadronic transitions between the $\Upsilon(2S)$ and the $\Upsilon(1S)$. The
charged dipion transition $\Upsilon(2S)\to \Upsilon(1S)\pi^+\pi^-$ was studied
using two different analysis techniques. Selecting events in which
$\Upsilon(1S)$ decays into a $\mu\mu$ or $ee$ lepton pair(``exclusive''
analysis), we measured the branching fraction of B=0.189+-0.004+-0.009, while
using a method allowing $\Upsilon(1S)$ to decay into anything (``inclusive''
analysis) we found B=0.0196+-0.002+-0.010. The appropriate average of the two
measurements gives B=0.0192+-0.002+-0.010. Combining the exclusive and
inclusive results we derive the $\Upsilon(1S)$ leptonic branching ratios
B_{ee}=0.0229+-0.0008+-0.0011 and B_{\mu\mu}=0.0249+-0.0008+-0.0013 We also
studied $\Upsilon(2S)\to \Upsilon(1S)\pi^0\pi^0$ and obtained the branching
fraction of B=0.092+-0.006+-0.007. Parameters of the $\pi\pi$ system (dipion
invariant mass spectra, angular distributions) were analyzed and found to be
consistent with current theoretical models. Lastly, we searched for the $\eta$
and single $\pi^0$ transitions and obtained the upper limits of 0.0028 and
0.0011 respectively.


title: BTeV/C0

abstract:
  The physics goals and techniques of the proposed BTeV experiment at the C0
Tevatron interaction area are summarized, with emphasis on aspects of the
experiment that depend on near-beam issues. BTeV aims to carry out a
comprehensive study of rare processes (especially CP violation) in charm and
beauty decay starting in collider Run II. Vertex detectors will be deployed
within a few mm of the beam. Early running may employ a wire target in the beam
halo.


title: Hunting For Direct CP Violation in Strange-Baryon Decays

abstract:
  Although CP-symmetry breaking has only been seen in neutral kaon decays, this
mysterious phenomenon is expected to occur elsewhere. In this talk, how CP
violation can arise in strange-baryon decays is briefly reviewed. The current
status and prospects for searching for such an effect will be presented.


title:
Measurement of the Shape of the Transverse Momentum Distribution of W
  Bosons Produced in pbarp Collisions at sqrt(s)= 1.8 TeV

abstract:
  The shape of the transverse momentum distribution of W bosons (p_T(W))
produced in pbarp collisions at sqrt(s)= 1.8 TeV is measured with the DO
detector at Fermilab. The result is compared to QCD perturbative and
resummation calculations over the p_T(W) range from 0-200 GeV/c. The shape of
the distribution is consistent with the theoretical prediction.


title: Limits on WWgamma and WWZ Couplings from W Boson Pair Production

abstract:
  The results of a search for W boson pair production in pbar-p collisions at
sqrt{s}=1.8 TeV with subsequent decay to emu, ee, and mumu channels are
presented. Five candidate events are observed with an expected background of
3.1+-0.4 events for an integrated luminosity of approximately 97 pb^{-1}.
Limits on the anomalous couplings are obtained from a maximum likelihood fit of
the E_T spectra of the leptons in the candidate events. Assuming identical
WWgamma and WWZ couplings, the 95 % C.L. limits are -0.62<Delta_kappa<0.77
(lambda = 0) and -0.53<lambda<0.56 (Delta_kappa = 0) for a form factor scale
Lambda = 1.5 TeV.


title: The HERMES Back Drift Chambers

abstract:
  The tracking system of the HERMES spectrometer behind the bending magnet
consists of two pairs of large planar 6-plane drift chambers. The design and
performance of these chambers is described. This description comprises details
on the mechanical and electronical design, information about the gas mixture
used and its properties, results on alignment, calibration, resolution, and
efficiencies, and a discussion of the experience gained through the first three
years of operation.


title: Measurement of a small atmospheric $\nu_\mu/\nu_e$ ratio

abstract:
  From an exposure of 25.5~kiloton-years of the Super-Kamiokande detector, 900
muon-like and 983 electron-like single-ring atmospheric neutrino interactions
were detected with momentum $p_e > 100$ MeV/$c$, $p_\mu > 200$ MeV/$c$, and
with visible energy less than 1.33 GeV. Using a detailed Monte Carlo
simulation, the ratio $(\mu/e)_{DATA}/(\mu/e)_{MC}$ was measured to be $0.61
\pm 0.03(stat.) \pm 0.05(sys.)$, consistent with previous results from the
Kamiokande, IMB and Soudan-2 experiments, and smaller than expected from
theoretical models of atmospheric neutrino production.


title: Experimental Measurements of Atmospheric Neutrinos

abstract:
  This talk reports the latest indications of an anomaly in the measurements of
atmospheric neutrinos. New results from Soudan-2 and Super-Kamiokande provide
evidence that the ratio of nu_mu to nu_e interactions is not as expected. High
energy Super-Kamiokande data indicates the cause is a deficit of upward-going
nu_mu, and the zenith angle dependence of the effect is consistent with
neutrino oscillations. Upward-going muon measurements by several detectors are
discussed, but in total they provide inconclusive evidence for the anomaly.


title: Upper limit on the eta -> pi^0 pi^0 decay

abstract:
  Upper bound 6*10^{-4} with 90% confidence is reported for the eta -> pi^0
pi^0 decay from the SND experiment at the VEPP-2M collider.


title:
Search for Charge 1/3 Third Generation Leptoquarks in pbarp Collisions
  at sqrt(s)=1.8 TeV

abstract:
  We report on a search for charge 1/3 third generation leptoquarks (LQ)
produced in pbarp collisions at sqrt(s) = 1.8 TeV using the D0 detector at
Fermilab. Third generation leptoquarks are assumed to be produced in pairs and
to decay to a tau neutrino and a b quark with branching fraction B. We place
upper limits on sigma(pbarp to LQbarLQ)xB^2 as a function of the leptoquark
mass M_LQ. Assuming B =1, we exclude at the 95% confidence level third
generation scalar leptoquarks with M_LQ<94 GeV/c^2, and third generation vector
leptoquarks with M_LQ<216 GeV/c^2 (M_LQ<148 GeV/c^2) assuming Yang-Mills
(anomalous) coupling.


title:
Measurement of the Mass Splittings between the $b\bar{b}\chi_{b,J}(1P)$
  States

abstract:
  We present new measurements of photon energies and branching fractions for
the radiative transitions: Upsilon(2S)->gamma+chi_b(J=0,1,2). The masses of the
chi_b states are determined from the measured radiative photon energies. The
ratio of mass splittings between the chi_b substates,
r==(M[J=2]-M[J=1])/(M[J=1]-M[J=0]) with M the chi_b mass, provides information
on the nature of the bbbar confining potential. We find
r(1P)=0.54+/-0.02+/-0.02. This value is in conflict with the previous world
average, but more consistent with the theoretical expectation that r(1P)<r(2P);
i.e., that this mass splittings ratio is smaller for the chi_b(1P) triplet than
for the chi_b(2P) triplet.


title: Measurement of the Light Antiquark Flavor Asymmetry in the Nucleon Sea

abstract:
  A precise measurement of the ratio of Drell-Yan yields from an 800 GeV/c
proton beam incident on hydrogen and deuterium targets is reported. Over
140,000 Drell-Yan muon pairs with dimuon mass M_{mu+ mu-} >= 4.5 GeV/c^2 were
recorded. From these data, the ratio of anti-down (dbar) to anti-up (ubar)
quark distributions in the proton sea is determined over a wide range in
Bjorken-x. A strong x dependence is observed in the ratio dbar/ubar, showing
substantial enhancement of dbar with respect to ubar for x<0.2. This result is
in fair agreement with recent parton distribution parameterizations of the sea.
For x>0.2, the observed dbar/ubar ratio is much nearer unity than given by the
parameterizations.


title: Physics Prospects at BTeV

abstract:
  BTeV is a proposed forward collider program at the Fermilab Tevatron
dedicated to precision studies of CP violation, mixing and rare decays of
beauty and charm hadrons. A description of the proposed detector and results of
simulations of several physics channels are presented.


title:
Observation of B^+ -> psi(2S) K^+ and B^0 -> psi(2S) K^*(892)^0 Decays
  and Measurements of B-Meson Branching Fractions into J/psi and psi(2S) Final
  States

abstract:
  We report the observations of the decays B^+ -> psi(2S) K^+ and B^0 ->
psi(2S) K^*(892)^0 in ppbar collisions at a center-of-mass energy of 1.8 TeV
using a 110 pb^{-1} data sample recorded by the Collider Detector at Fermilab.
We also reconstruct the decays B^+ -> J/psi K^+ and B^0 -> J/psi K^*(892)^0 and
measure the six ratios of branching fractions of these four decays. The
relative branching-fraction results are shown to be consistent with
phenomenological factorization calculations of hadronic B-meson decays. We use
the world-average branching fraction Br(B^+ -> J/psi K^+) to derive Br(B^+ ->
psi(2S) K^+) = (0.56 +/- 0.08 +/- 0.10) x 10^{-3}, Br(B^0 -> psi(2S)
K^*(892)^0) = (0.92 +/- 0.20 +/- 0.16) x 10^{-3}, and Br(B^0 -> J/psi
K^*(892)^0) = (1.78 +/- 0.14 +/- 0.29) x 10^{-3}, where the first and second
uncertainties are statistical and systematic, respectively.


title: K2K (KEK to Kamioka) neutrino-oscillation experiment at KEK-PS

abstract:
  A long-baseline neutrino-oscillation experiment using a well-defined neutrino
beam is in preparation at KEK. Neutrinos generated at KEK will be detected by
the Super-kamiokande detector 250 km away. The design of the neutrino beam
line, beam monitors and detector are briefly presented. The sensitivities for
neutrino oscillations are also discussed.


title:
Search for Chargino-Neutralino Associated Production at the Fermilab
  Tevatron Collider

abstract:
  We have searched in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.8 TeV for events
with three charged leptons and missing transverse energy. In the Minimal
Supersymmetric Standard Model, we expect trilepton events from
chargino-neutralino ($\chione \chitwo$) pair production, with subsequent decay
into leptons. We observe no candidate $e^+e^-e^\pm$, $e^+e^-\mu^\pm$,
$e^\pm\mu^+\mu^-$ or $\mu^+\mu^-\mu^\pm$ events in 106 pb$^{-1}$ integrated
luminosity. We present limits on the sum of the branching ratios times cross
section for the four channels: $\sigma_{\chione\chitwo}\cdot
$BR$(\chione\chitwo\to 3\ell+X) < 0.34$~pb, M$_\chione > $ 81.5 \mgev\sp and
M$_\chitwo > $ 82.2 \mgev\sp for $\tan\beta=2$, $\mu =-600$~\mgev\sp and
M$_\squark=$ M$_\gluino$.


title:
A-Dependencies of Neutral Strange Particle Yields at $40 GeV/c \bar
  p$-Nuclei Collisions

abstract:
  The interactions of $\bar p$ with D(2), Li(7), C(12), S(32), Cu(64) and
Pb(207) nuclei at $40 GeV/c$ were studied by RISC-streamer chamber
spectrometer. The yields of $K^0$ mesons and $\Lambda$ and $\bar\Lambda$
hyperons as functions of the target nucleus mass numbers are investigated. The
experimental results are compared with model predictions using $FRITIOF-7.02$
program package.


title: Limits on Anomalous WWgamma and WWZ Couplings

abstract:
  Limits on the anomalous WWgamma and WWZ couplings are presented from a
simultaneous fit to the data samples of three gauge boson pair final states in
pbar-p collisions at sqrt(s)=1.8 TeV: Wgamma production with the W boson
decaying to enu or munu, W boson pair production with both of the W bosons
decaying to enu or munu, and WW or WZ production with one W boson decaying to
enu and the other W boson or the Z boson decaying to two jets. Assuming
identical WWgamma and WWZ couplings, 95 % C.L. limits on the anomalous
couplings of -0.30<Delta kappa<0.43 (lambda = 0) and -0.20<lambda<0.20 (Delta
kappa = 0) are obtained using a form factor scale Lambda = 2.0 TeV. Limits
found under other assumptions on the relationship between the WWgamma and WWZ
couplings are also presented.


title:
Observation of $B^{+}\to \omega K^{+}$ and Search for Related $B$ Decay
  Modes

abstract:
  We have searched for two-body charmless decays of B mesons to purely hadronic
exclusive final states including $\omega$ or $\phi$ mesons using data collected
with the CLEO II detector. With this sample of $6.6 \times 10^6$ B mesons we
observe a signal for the $\omega K^+$ final state, and measure a branching
fraction of B($B^+ \to \omega K^+$) = 1.5 +0.7 -0.6 +-0.2 $\times 10^{-5}$. We
also observe some evidence for the $\phi K^*$ final state, and upper limits are
given for 22 other decay modes. These results provide the opportunity for
studies of theoretical models and physical parameters.


title:
A Search for Neutral Higgs Bosons in the MSSM and Models with Two Scalar
  Field Doublets

abstract:
  A search is described for the neutral Higgs bosons h^0 and A^0 predicted by
models with two scalar field doublets and, in particular, the Minimal
Supersymmetric Standard Model (MSSM). The search in the Z^0 h^0 and h^0 A^0
production channels is based on data corresponding to an integrated luminosity
of 25 pb^{-1} from e^+e^- collisions at centre-of-mass energies between 130 and
172 GeV collected with the OPAL detector at LEP. The observation of a number of
candidates consistent with Standard Model background expectations is used in
combination with earlier results from data collected at the Z^0 resonance to
set limits on m_h and m_A in general models with two scalar field doublets and
in the MSSM. For example, in the MSSM, for tan(beta) > 1, minimal and maximal
scalar top quark mixing and soft SUSY-breaking masses of 1 TeV, the 95%
confidence level limits m_h > 59.0 GeV and m_A > 59.5 GeV are obtained. For the
first time, the MSSM parameter space is explored in a detailed scan.


title: An upper limit on the anomalous magnetic moment of the \tau lepton

abstract:
  Using radiative Z^0 -> \tau^+ \tau^- \gamma events collected with the OPAL
detector at LEP at \sqrt{s}= M_Z during 1990-95, a direct study of the
electromagnetic current at the \tau\gamma vertex has been performed in terms of
the anomalous magnetic form factor F_2 of the \tau lepton. The analysis is
based on a data sample of 1429 e^+ e^- -> \tau^+ \tau^- \gamma events which are
examined for a deviation from the expectation with F_2 = 0. From the
non-observation of anomalous \tau^+ \tau^- \gamma production a limit of
  -0.068 < F_2 < 0.065
  is obtained. This can also be interpreted as a limit on the electric dipole
form factor F_3 as
  -3.8 x 10^-16 e-cm < eF_3 < 3.6 x 10^-16 e-cm.
  The above ranges are valid at the 95% confidence level.


title:
Charge Asymmetries for D, D_s and Lambda_c Production in Sigma- -
  Nucleus Interactions at 340 GeV/c

abstract:
  CERN experiment WA89 has studied charmed particles produced by a Sigma^- beam
at 340 GeV/c on nuclear targets. Production of particles which have light
quarks in common with the beam is compared to production of those which do not.
Considerable production asymmetries between D^- and D^p, D_s^ and D_s^+ and
Lambda_c and Antilambda_c are observed. The results are compared with pion beam
data and with theoretical calculations.


title: Radiative Decay Modes of the $D^{0}$ Meson

abstract:
  Using data recorded by the CLEO-II detector at CESR we have searched for four
radiative decay modes of the $D^0$ meson: $D^0\to\phi\gamma$,
$D^0\to\omega\gamma$, $D^0\to\bar{K}^{*}\gamma$, and $D^0\to\rho^0\gamma$. We
obtain 90% CL upper limits on the branching ratios of these modes of $1.9\times
10^{-4}$, $2.4\times 10^{-4}$, $7.6\times 10^{-4}$ and $2.4\times 10^{-4}$
respectively.


title: Search For Heavy Pointlike Dirac Monopoles

abstract:
  We have searched for central production of a pair of photons with high
transverse energies in $p\bar p$ collisions at $\sqrt{s} = 1.8$ TeV using $70
pb^{-1}$ of data collected with the D\O detector at the Fermilab Tevatron in
1994--1996. If they exist, virtual heavy pointlike Dirac monopoles could
rescatter pairs of nearly real photons into this final state via a box diagram.
We observe no excess of events above background, and set lower 95% C.L. limits
of $610, 870, or 1580 GeV/c^2$ on the mass of a spin 0, 1/2, or 1 Dirac
monopole.


title: A search for non-qqbar mesons at the CERN Omega Spectrometer

abstract:
  The non-Abelian nature of QCD suggests that particles that have a gluon
constituent, such as glueballs or hybrids, should exist. Experiments WA76, WA91
and WA102 have performed a dedicated search for these states in central
production using the CERN Omega Spectrometer. Several non-qqbar candidates have
been observed. This paper presents a study of central meson production as a
function of the difference in transverse momentum (dPT) of the exchanged
particles which shows that undisputed qqbar mesons are suppressed at small dPT
whereas the glueball candidates are enhanced.


title: Experiments at Large Underground Detectors

abstract:
  This talk reports a subset of the topics discussed at TAUP97. The topics are:
nucleon decay, supermassive monopoles, Neutrino Astrophysics and Cosmic Ray
Physics.


title:
Search for Stable and Long-Lived Massive Charged Particles with the OPAL
  Detector at LEP in e+e- Collisions at \sqrt{s}=130-183 GeV

abstract:
  A search for stable and long-lived massive particles of electric charge |Q/e|
= 1 or 2/3, pair-produced in e+e- collisions at centre-of-mass energies from
130 to 183 GeV, is reported by the OPAL collaboration at LEP. No evidence for
production of these particles was observed in a mass range between 45 and 89.5
GeV. Model-independent upper limits on the production cross-section between
0.05 and 0.19 pb have been derived for scalar and spin-1/2 particles with
charge +/-1. Within the framework of the minimal supersymmetric model (MSSM),
this implies a lower limit of 82.5 (83.5) GeV on the mass of long-lived right-
(left-)handed scalar muons and scalar taus. Long-lived charged leptons and
charginos are excluded for masses below 89.5 GeV. For particles with charge
+/-2/3 the upper limits on the production cross-section vary between 0.05 and
0.2 pb. All limits, on masses and on cross-sections, are valid at the 95%
confidence level for particles with lifetimes longer than 10^{-6} s.


title:
The monitoring system for the aerogel Cherenkov counter of the BELLE
  detector

abstract:
  We report on a design and performances of a monitoring system developed for
the aerogel Cherenkov counters (ACC) of the BELLE detector. The system consists
of blue LEDs, a diffuser box, and optical distributors which distribute the LED
light to the ACC modules. The employed LED (NSPB series) has been observed to
have high reliability on the long term stability and the temprature dependence.
The diffuser box is employed to reduce the intrinsic non-uniformity of the LED
light intensity. The overall performances of the present monitoring system on
uniformity and intensity of the light output have been found to satisfy all the
requirements for the monitoring.


title: First observation of five charmless hadronic B decays

abstract:
  There has been much progress in measurements of charmless hadronic B decays
during 1997. Building on the previous indications from CLEO and LEP, CLEO now
has clear signals in five exclusive final states: K^+\pi^, K^0\pi^+, etapr K^+,
etapr K^0, and omega K^+. The branching fractions for the etapr K modes are
several times larger than the others. A similar strikingly large signal has
been seen in the inclusive decay, B->etapr X_S. All of these signals would
appear to be dominated by hadronic penguin processes. (Invited talk presented
at the Seventh International Symposium On Heavy Flavor Physics, Santa Barbara,
CA, July 7-11, 1997.)


title:
A study of pseudoscalar states produced centrally in pp interactions at
  450 GeV/c

abstract:
  A study has been made of pseudoscalar mesons produced centrally in pp
interactions. The results show that the eta and etaprime appear to have a
similar production mechanism which differs from that of the pi0. The production
properties of the eta and etaprime are not consistent with what is expected
from double Pomeron exchange. In addition the production mechanism for the eta
and etaprime is such that the production cross section are greatest when the
azimuthal angle between the pT vectors of the two protons is 90 degrees.


title: Search for the Proton Decay Mode proton to neutrino K+ in Soudan 2

abstract:
  We have searched for the proton decay mode proton to neutrino K+ using the
one-kiloton Soudan 2 high resolution calorimeter. Contained events obtained
from a 3.56 kiloton-year fiducial exposure through June 1997 are examined for
occurrence of a visible K+ track which decays at rest into mu+ nu or pi+ pi0.
We found one candidate event consistent with background, yielding a limit,
tau/B > 4.3 10^{31} years at 90% CL with no background subtraction.


title: A Limit on the Mass of the $\nu_{\tau}$

abstract:
  A limit on the mass of the tau neutrino is derived from 4.5 million tau pairs
produced in an integrated luminosity of 5.0 fb^{-1} of electron-positron
annihilation to tau pairs at center of mass energies near 10.6 GeV. The
measurement technique involves a two-dimensional extended likelihood analysis,
including the dependence of the end-point population on the neutrino mass, and
allows for the first time an explicit background contribution. We use the
decays of the tau to five charged pions and a neutrino as well as the decay to
three charged pions, two neutral pions and a neutrino to obtain an upper limit
of 30 MeV/c^2 at 95% C.L.


title: Hadron Production in Diffractive Deep-Inelastic Scattering

abstract:
  Characteristics of hadron production in diffractive deep-inelastic
positron-proton scattering are studied using data collected in 1994 by the H1
experiment at HERA. The following distributions are measured in the
centre-of-mass frame of the photon dissociation system: the hadronic energy
flow, the Feynman-x (x_F) variable for charged particles, the squared
transverse momentum of charged particles (p_T^{*2}), and the mean p_T^{*2} as a
function of x_F. These distributions are compared with results in the gamma^* p
centre-of-mass frame from inclusive deep-inelastic scattering in the
fixed-target experiment EMC, and also with the predictions of several Monte
Carlo calculations. The data are consistent with a picture in which the
partonic structure of the diffractive exchange is dominated at low Q^2 by hard
gluons.


title:
Kaon Radiative Decay K+ -> mu+ nu gamma at CKM at the Fermilab Main
  Injector

abstract:
  High statistics data for the K+ -> mu+ nu gamma decay can allow the precision
determination of the kaon structure dependent form factors and the kaon
polarizability. This study is possible at the proposed FNAL CKM experiment.
  CKM (Charged Kaons at the Main injector) is a decay-in-flight spectrometer
with two RICH, and designed to run at the main injector with a high kaon flux.
The radiative decay data will be taken complementary to the primary CKM effort
to study the rare kaon decay (K to pi nu nubar) for which CKM was primarily
designed. We summarize here the underlying physics of K ->mu nu gamma, the
experimental status, and how the CKM spectrometer will be adapted for this
study.


title: Measurement of Jet Shapes in High-Q**2 Deep Inelastic Scattering at HERA

abstract:
  The shapes of jets with transverse energies, E_T(jet), up to 45 GeV produced
in neutral- and charged-current deep inelastic e+p scattering (DIS) at Q**2 >
100 GeV**2 have been measured with the ZEUS detector at HERA. Jets are
identified using a cone algorithm in the eta-phi plane with a cone radius of
one unit. The jets become narrower as E_T(jet) increases. The jet shapes in
neutral- and charged-current DIS are found to be very similar. The jets in
neutral-current DIS are narrower than those in resolved processes in
photoproduction and closer to those in direct-photon processes for the same
ranges in E_T(jet) and jet pseudorapidity. The jet shapes in DIS are observed
to be similar to those in e+e- interactions and narrower than those in pbarp
collisions for comparable E_T(jet). Since the jets in e+e- interactions and e+p
DIS are predominantly quark initiated in both cases, the similarity in the jet
shapes indicates that the pattern of QCD radiation within a quark jet is to a
large extent independent of the hard scattering process in these reactions.


title:
Study of $\Delta(1232)$ isobar electroproduction at VEPP-2M $e^+e^-$
  collider

abstract:
  Results from the Spherical Nonmagnetic Detector (SND) on $\Delta (1232)$
isobar electroproduction in the collisions of beam electrons (positrons) and
residual gas nuclei in the VEPP-2M $e^+e^-$ collider are presented. On the
basis of the obtained data the expected counting rate of this process in future
high luminosity $e^+e^-$ colliders (~$\phi$-, $c$-$\tau$- and $b$-factories)
was estimated.


title: Search for a new gauge boson in $\pi^{0}$ decays

abstract:
  A search was made for a new light gauge boson $X$ which might be produced in
$\pi^{0}\to\gamma + X$ decay from neutral pions generated by 450-GeV protons in
the CERN SPS neutrino target. The X's would penetrate the downstream shielding
and be observed in the NOMAD detector via the Primakoff effect, in the process
of $X \to\pi^{0}$ conversion in the external Coulomb field of a nucleus. With
$1.45\times10^{18}$ protons on target, 20 candidate events with energy between
8 and 140 GeV were found from the analysis of neutrino data.
  This number is in agreement with the expectation of 18.1$\pm$2.8 background
events from standard neutrino processes. A new 90% C.L. upper limit on the
branching ratio $Br(\pi^{0}\to\gamma + X)< (3.3 to 1.9) \times10^{-5}$ for $X$
masses ranging from 0 to 120 MeV/c^2 is obtained.