title:
Asymmetries in the Production of $\Lambda_c^+$ and $\Lambda_c^-$ Baryons
  in 500 GeV/c $\pi^-$ Nucleon Interactions

abstract:
  We present a measurement of asymmetries in the production of $\Lambda_c^+$
and $\Lambda_c^-$ baryons in 500 GeV/c $\pi^-$--nucleon interactions from the
E791 experiment at Fermilab. The asymmetries were measured as functions of
Feynman x ($x_F$) and transverse momentum squared ($p_T^2$) using a sample of
$1819 \pm 62$ $\Lambda_c$'s observed in the decay channel $\Lambda_c \to
pK^-\pi^+$. We observe more $\Lambda_c^+$ than $\Lambda_c^-$ baryons, with an
asymmetry of $(12.7\pm3.4\pm1.3) %$ independent of $x_F$ and $p_T^2$ in our
kinematical range $(-0.1 < x_F < 0.6$ and $0.0 < p_T^2 < 8.0 (GeV/c)^2$). This
$\Lambda_c$ asymmetry measurement is the first with data in both the positive
and negative $x_F$ regions.


title:
RFQD - a Decelerating Radio Frequency Quadrupole for the CERN Antiproton
  Facility

abstract:
  The RFQD is designed to decelerate antiprotons of momentum 100 MeV/c (kinetic
energy 5.33MeV)down to a kinetic energy variable between ~10 keV and 120 keV.
Inside the RFQ body, at ground potential, the rf structure of the four-rod type
is mounted on insulating supports. It can be biased between plus/minus 60 kV dc
to achieve the continuous adjustment of output energy required by the ASACUSA
experiment at the CERN Antiproton Decelerator AD. The different parts of the
system are described and the present status reported.


title: Measurement of $\psi(2S)$ decays to baryon pairs

abstract:
  A sample of 3.95M $\psi(2S)$ decays registered in the BES detector are used
to study final states containing pairs of octet and decuplet baryons. We report
branching fractions for $\psi(2S)\to p\bar{p}$, $\Lambda\bar{\Lambda}$,
$\Sigma^0\bar{\Sigma}{}^0$, $\Xi^-\bar{\Xi}{}^+$,
$\Delta^{++}\bar{\Delta}{}^{--}$, $\Sigma^+(1385)\bar{\Sigma}{}^-(1385)$,
$\Xi^0(1530)\bar{\Xi}{}^0(1530)$, and $\Omega^-\bar{\Omega}{}^+$. These results
are compared to expectations based on the SU(3)-flavor symmetry, factorization,
and perturbative QCD.


title: Light Quark Fragmentation in Polarized Z0 Decays at SLD

abstract:
  We report results on two physics topics from the SLD experiment at the SLAC
Linear Collider, using our full sample of 550,000 events of the type e+e- -->
Z0 --> q-q(bar). The electron beam was polarized, enabling the quark and
antiquark hemispheres to be tagged in each event. One physics topic is the
first study of rapidities signed such that positive rapidity is along the quark
rather than antiquark direction. Distributions of ordered differences in signed
rapidity between pairs of particles are analyzed, providing the first direct
observation of baryon number ordering along the q-q(bar) axis. The other topic
is the first direct measurement of A_s, the parity-violating coupling of the Z0
to strange quarks, by measuring the left-right forward-backward production
asymmetry in polar angle of the tagged s-quark. We obtain A_s = 0.895 +-
0.066(stat.) +- 0.062(syst.), which is consistent with the Standard Model and
is currently the most precise measurement of this quantity.


title: Development of rf reference line for the linear collider

abstract:
  The rf distribution system for the linear collider requires stable
x-band(11.424GHz) rf phase signal over 25km length. In order to realize the
distribution system, a fiber optic link using a phase stabilized optical fiber
was tested. The phase stabilized optical fiber has been employed at LEP, KEKB,
etc.. This paper describes the hardware system and result of the preliminary
test of the feed back system for stabilization of the phase change.


title: Fabrication Process of Rounded Damped Detuned Structure

abstract:
  Following the successful design and fabrication of Damped Detuned Structures
(DDS), the JLC/NLC linear collider project advanced to Rounded Damped Detuned
Structures (RDDS) with curved cross section of the cavity shape for increased
shunt impedance. Various advanced techniques for fabricating RDDS1 disks
comparing to those for DDS were established to satisfy the dimension accuracy
of +-1 micron over the entire surface made by ultra-precision turning. These
disks were assembled with almost the same stacking and bonding jigs and
processes as those of DDS3 assembly. In consequence, the assembly showed little
disk-to-disk misalignment within 1 micron before and after the process. Though,
it had 200 micron smooth bowing, which was subsequently corrected as DDS3, and
flares at both ends.


title: Meeting Tight Frequency Requirement of Rounded Damped Detuned Structure

abstract:
  Following successful design and fabrication of damped detuned structures, the
R&D for the accelerating structures of the NLC/JLC linear collider project
proceeded to studies of Rounded Damped Detuned Structure with curved cross
section of the cavity shape for increased shunt impedance. The important
features of the structure are the accurately tuned accelerating mode frequency
and the distribution of the first dipole modes smooth and close to the design
distribution. These requirements were met based on the high-accuracy diamond
turning with its capability to realize the periphery tolerance of two microns.
The lowest dipole mode frequencies scattered by 0.6 MHz RMS. The error in the
accelerating mode frequency averaged over a structure was 0.1 MHz by applying a
feed-forward method.


title: Measurement of Light-Cone Wave Functions by Diffractive Dissociation

abstract:
  Diffractive dissociation of particles can be used to study their light-cone
wave function. Results from Fermilab experiment E791 for diffractive
dissociation of 500 GeV/c $\pi^-$ mesons into di-jets are presented. The
results show that the $|q\bar {q}>$ light-cone asymptotic wave function
describes the data well for $Q^2 \sim 10 ~{\rm (GeV/c)^2}$ or more. Evidence
for color transparency comes from a measurement of the $A$-dependence of the
yield of the diffractive di-jets. It is proposed to carry out similar studies
for the light-cone wave function of the photon.


title:
The Q^2-dependence of the Generalised Gerasimov-Drell-Hearn Integral for
  the Proton

abstract:
  The dependence on Q^2 (the negative square of the 4-momentum of the exchanged
virtual photon) of the generalised Gerasimov-Drell-Hearn integral for the
proton has been measured in the range 1.2 GeV^2 < Q^2 < 12 GeV^2 by scattering
longitudinally polarised positrons on a longitudinally polarised hydrogen gas
target. The contributions of the nucleon-resonance and deep-inelastic regions
to this integral have been evaluated separately. The latter has been found to
dominate for Q^2 > 3 GeV^2, while both contributions are important at low Q^2.
The total integral shows no significant deviation from a 1/Q^2 behaviour in the
measured Q^2 range, and thus no sign of large effects due to either
nucleon-resonance excitations or non-leading twist.


title: The Next Linear Collider Klystron Development Program*

abstract:
  Klystrons capable of 75 MW output power at 11.4 GHz have been under
development at SLAC for the last decade. The work has been part of the program
to realize all the components necessary for the construction of the Next Linear
Collider (NLC). The effort has produced a family of solenoid-focused 50 MW
klystrons, which are currently powering a 0.5 GeV test accelerator at SLAC and
several test stands, where high power components are evaluated and fundamental
research is performed studying rf breakdown and dark current production.
Continuing development has resulted in a Periodic Permanent Magnet (PPM)
focused 50 MW klystron, tested at SLAC and subsequently contracted for
manufacture by industry in England and Japan. A 75 MW version of that PPM
klystron was built at SLAC and reached 75 MW, with 2.8 microsecond pulses.
Based on this design, a prototype 75 MW klystron, designed for low-cost
manufacture, is currently under development at SLAC, and will eventually be
procured from industry in modest quantities for advanced NLC tests. Beyond
these developments, the design of Multiple Beam Klystrons (MBKs) is under study
at SLAC. MBKs offer the possibility of considerably lower modulator costs by
producing comparable power to the klystrons now available, at much lower
voltages.
  * This work supported by the Department of Energy under contract
DE-AC03-76SF00515


title:
High Power Testing Results of the X-Band Mixed-Mode RF Windows for
  Linear Colliders

abstract:
  In this paper, we summarize the high power testing results of the X-band
mixed-mode RF windows at KEK and SLAC for linear colliders. The main feature of
these windows is that the combination of modes on the surface of the ceramic
significantly decreases the electric and magnetic fields in the junction
between the ceramic and the metal. So far two types of high power windows (with
the diameter of 53 mm and 64 mm) have been fabricated. A high power model of
the smaller type window was fabricated and tested in a resonant ring at KEK. A
maximum circulating power of 81 MW with 300 ns duration or 66 MW with 700 ns
duration was achieved. Light emission was observed for a power level of over 10
MW. Later, both windows were shipped to SLAC for even higher power testing
using combined power from two klystrons. The first window (53 mm diameter)
achieved a transmitted power of 80 MW with 1.5 microsec duration at 30 Hz
repetition. It was not destroyed during the testing. The testing of the second
window was carried out next to the small type and achieved 62 MW with 1.5
maicrosec duration with 10 Hz repetition. The final results of both windows are
presented in this report.


title: Unexplained Structure in (mu,pi) Invariant Mass Distributions

abstract:
  Structures in invariant mass distributions from (mu,pi) combinations in the
range 0.380<mupi<0.470 GeV from neutrino and kaon experiments are presented in
comparable formats. No artifacts have been found to account for any part of the
structure. Hypotheses that the similarities are due to recurrent statistical
fluctuations are beyond credibility. My conclusion is that the similarities are
overwhelming evidence that the structure is of an unexplained physical origin.
It includes an enhancement which would accord with the decay of a narrow
(mu,pi) state of mass 0.429 GeV. The purpose of this report is to request and
enable every experimenter with precise mupi distributions to investigate their
degree of correspondence with these analyses.


title: Jet Structure Studies at LEP and HERA

abstract:
  A summary of some recent studies in jet physics is given. Topics include
leading particle production in light flavor events in e+e- annihilations, an
analytical treatment of gluon and quark jets at the
next-to-next-to-next-to-leading order (3NLO), and various studies performed at
LEP and HERA involving separated gluon and quark jets.


title: A New High Energy Photon Tagger for the H1 - Detector at HERA

abstract:
  The H1 detector at HERA has been upgraded by the addition of a new
electromagnetic calorimeter. This is installed in the HERA tunnel close to the
electron beam line at a position 8m from the interaction point in the electron
beam direction. The new calorimeter extends the acceptance for tagged
photoproduction events to the high y range, 0.85 < y < 0.95, and thus
significantly improves the capability of H1 to study high energy gamma-p
processes. The calorimeter design, performance and first results obtained
during the 1996-1999 HERA running are described.


title: Final States in Diffraction at HERA

abstract:
  Recent experimental results on diffractive high $E_T$ jet production and
diffractive open charm production, obtained by the H1 and ZEUS experiments at
HERA, are presented. Various theoretical models for diffractive hard scattering
are discussed and confronted with the experimental data.


title: Supernova Neutrino Detection

abstract:
  World-wide, several detectors currently running or nearing completion are
sensitive to a core collapse supernova neutrino signal in the Galaxy. I will
briefly describe the nature of the neutrino signal and then survey current and
future detection techniques. I will also explore what physics and astrophysics
we can learn from the next Galactic core collapse.


title: Study of the KL to PI+PI-GAMMA Direct Emission Vertex

abstract:
  We have perfomed studies of the KL to PI+PI-GAMMA Direct Emission (DE) and
Inner Bremsstrahlung (IB) vertices, based on data collected by KTeV during the
1996 Fermilab fixed target run. We find a1/a2 = -0.737 +- 0.034 GeV^2 for the
DE form-factor parameter in the rho-propagator parametrization, and report on
fits of the form-factor to linear and quadratic functions as well. We
concurrently measure B.R.(KL to PI+PI-GAMMA, E_gamma >20 MeV)/(KL to PI+PI-) =
(20.8 +- 0.3)*10^-3, and a KL to PI+PI-GAMMA DE/(DE + IB) branching ratio of
0.683 +- 0.011.


title: Future Reactor Neutrino Oscillation Experiments at Krasnoyarsk

abstract:
  Recent studies of atmospheric neutrinos and the results from CHOOZ and
Palo-Verde experiment call for new and more sensitive searches for neutrino
oscillations at reactors. The main goal of the project considered here is to
look for very small mixing angle oscillations of electron neutrinos in the
atmospheric neutrino mass parameter region around \Delta m^2 ~3 10^-3 eV^2 and
to define the element U_{e3} of the neutrino mixing matrix (U_{e3}is the
contribution of the mass-3 state to the electron neutrino flavor state). The
practical goal of the project is to decrease, relative to the CHOOZ, the
statistic and systematic errors as much as possible. To achieve this we plan to
use two identical antineutrino detectors each with a ~50-ton liquid
scintillator target located at ~1100 m and ~250 m from the underground reactor
(~600 mwe). Much attention is given to the detector calibration and monitoring
procedures. As a first step we consider two much smaller pilot detectors each
of ~ a 3 ton target mass stationed at ~20 m and 35-60 m from the reactor. The
goals of this first stage are: (i) to accumulate necessary experience and (ii)
to investigate with electron neutrinos the LSND mass parameter region.


title: The First Results of K2K long-baseline Neutrino Oscillation Experiment

abstract:
  The first results of the K2K(KEK to Kamioka) long-baseline neutrino
oscillation experiment are presented in this talk. In 1999 7.2x10^18 protons on
target were delivered to the experiment. During this period of running there
were 3 events fully contained in the Super-Kamiokande inner detector fiducial
area which occurred during the beam spill timing window. In the case of no
oscillations the expected number of events during this period was 12.3+1.7-1.9.
The near detectors located at KEK also have begun detailed measurements of
neutrino interactions in water at around 1 GeV.


title:
A study of time-dependent CP-violating asymmetries in B0 -> J/psi K0S
  and B0 -> psi(2S) K0S decays

abstract:
  We present a preliminary measurement of time-dependent CP-violating
asymmetries in B0 -> J/psi K0S and B0 -> psi(2S) K0S decays recorded by the
BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The data
sample consists of 9.0 fb-1 collected at the Y(4S) resonance and 0.8 fb-1
off-resonance. One of the neutral B mesons, produced in pairs at the Y(4S), is
fully reconstructed. The flavor of the other neutral B meson is tagged at the
time of its decay, mainly with the charge of identified leptons and kaons. A
neural network tagging algorithm is used to recover events without a clear
lepton or kaon tag. The time difference between the decays is determined by
measuring the distance between the decay vertices. Wrong-tag probabilities and
the time resolution function are measured with samples of fully-reconstructed
semileptonic and hadronic neutral B final states. The value of the asymmetry
amplitude, sin2beta, is determined from a maximum likelihood fit to the time
distribution of 120 tagged B0 -> J/psi K0S and B0 -> psi(2S) K0S candidates to
be sin2beta = 0.12+/-0.37 (stat) +/- 0.09 (syst) (preliminary).


title:
Measurement of inclusive production of charmonium states in B meson
  decays

abstract:
  We reconstruct the charmonium mesons J/psi, psi(2S) and chi_C1 using a sample
of 8.46 x 10^6 B-anti-B events collected by the BABAR detector operating at
e^+e^- center of mass energies near the Y(4S) resonance. By measuring rates
relative to the branching fraction of the J/psi, we obtain preliminary
inclusive B branching fractions of (0.25+/-0.02+/-0.02)% to the psi(2S) and
(0.39+/-0.04+/-0.04)% to the chi_C1, and set a 90% confidence level limit of
0.24% on decays through the chi_C2.


title: Exclusive B decays to charmonium final states

abstract:
  We report on exclusive decays of B mesons into final states containing
charmonium using data collected with the BABAR detector at the PEP-II storage
rings. The charmonium states considered here are J/psi, psi(2S), and chi_C1.
Branching fractions for several exclusive final states, a measurement of the
decay amplitudes for the B0 --> J/psi K* decay, and measurements of the B0 and
B+ masses are presented. All of the results we present here are preliminary.


title:
Measurement of the branching fractions for B^0 -> D^{*-}pi^+ and B^0 ->
  D^{*-}rho^+

abstract:
  Using 5.2 fb-1 of e^+e^- annihilation data recorded with the BABAR detector
at the PEP-II storage ring while operating on the Y(4S) resonance, a sample of
fully reconstructed B^0 decays in the hadronic modes B^0 -> D^{*-}pi^+ and B^0
-> D^{*-}rho^+ have been reconstructed. In this paper, a study of these events
is reported, including preliminary measurements of the absolute branching
fractions for these modes, which are found to be B(B^0 -> D^{*-}pi^+) =
(2.9+/-0.3+/-0.3) x 10^{-3} and B(B^0 -> D^{*-}rho^+) = (11.2+/-1.1+/-2.5) x
10^{-3}.


title:
A measurement of the B^0-anti-B^0 oscillation frequency and
  determination of flavor-tagging efficiency using semileptonic and hadronic
  B^0 decays

abstract:
  B^0-anti-B^0 flavor oscillations are studied in e^+e^- annihilation data
collected with the BABAR detector at center-of-mass energies near the Y(4S)
resonance. One B is reconstructed in a hadronic or semileptonic decay mode, and
the flavor of the other B in the event is determined with a tagging algorithm
that exploits the relation between the flavor of the heavy quark and the
charges of its decay products. Tagging performance is characterized by an
efficiency e_i and a probability for mis-identification, w_i, for each tagging
category. We report a determination of the wrong-tag probabilities, w_i, and a
preliminary result for the time-dependent B^0-anti-B^0 oscillation frequency,
Delta_md = 0.512+/-0.017+/-0.022 hbar-ps^{-1}.


title:
Measurement of the B^0 meson properties using partially reconstructed
  B^0 to D^{*-}pi^+ and B^0 to D^{*-}l^+nu decays with the BABAR detector

abstract:
  The two B^0 decay processes B^0 --> D^{*-}pi^+ and B^0 --> D^{*-}l^+nu have
been studied by means of a partial reconstruction technique using a data sample
collected with the BABAR detector at the PEP-II storage ring. To increase
statistics, only the soft pi^- from the decay D^{*-} --> pi^-D^0 was used in
association with either an oppositely-charged high-momentum pion or lepton.
Events were then identified by exploiting the constraints from the simple
kinematics of Y(4S) decays. A clear signature is obtained in each case. The
position of the B^0 decay point was obtained from the reconstructed
pi^+(l^+)pi^- vertex. The position of the other anti-B^0 in the event was also
determined. Taking advantage of the boost given to the Y(4S) system by the
asymmetric beam energies of PEP-II, the lifetime of the B^0 meson has been
measured from the separation distance between the two vertices along the beam
direction. The preliminary results are tau_B0 = 1.55+/-0.05+/-0.07 ps, tau_B0 =
1.62+/-0.02+/-0.09 ps, respectively for the B^0 --> D^{*-}pi^+ and B^0 -->
D^{*-}l^+nu channels.


title:
Measurement of the time dependence of B^0-anti-B^0 oscillations using
  inclusive dilepton events

abstract:
  A preliminary study of time dependence of B^0-anti-B^0 oscillations using
dilepton events is presented. The flavor of the B meson is determined by the
charge sign of the lepton. To separate signal leptons from cascade and fake
leptons we have used a method which combines several discriminating variables
in a neural network. The time evolution of the oscillations is studied by
reconstructing the time difference between the decays of the B mesons produced
by the Y(4S) decay. With an integrated luminosity of 7.7 fb-1 collected on
resonance by BABAR at the PEP-II asymmetric B Factory, we measure the
difference in mass of the neutral B eigenstates, Delta_mB0, to be
(0.507+/-0.015+/-0.022) x 10^{12} hbar-s^{-1}.


title:
A measurement of the branching fraction of the exclusive decay B^0 -->
  K^{*0}gamma

abstract:
  The b --> s gamma transition proceeds by a loop ``penguin'' diagram. It may
be used to measure precisely the couplings of the top quark and to search for
the effects of any new particles appearing in the loop. We present a
preliminary measurement of the branching fraction of the exclusive decay, B^0
--> K^{*0}gamma. We use 8.6 x 10^6 B-anti-B decays to measure B(B^0 -->
K^{*0}gamma) = (5.4+/-0.8+/-0.5) x 10^{-5}.


title:
Study of inclusive D_S^((*)+/-) production in B decays and measurement
  of B^0 --> D^(*-)D_S^((*)+) decays using a partial reconstruction technique

abstract:
  Electron-positron annihilation data collected by the BABAR detector near the
Y(4S) resonance are used to study the inclusive decay of B mesons to D_S^(+/-)
and D_S^(*+/-) mesons, where the D_S^(+/-) is reconstructed using the decay
D_S^(+/-) --> phi pi^(+/-). The production fraction of inclusive D_S^((*)+/-)
and the corresponding momentum spectra have been determined. The exclusive
decays B^0 --> D^(*-)D_S^((*)+) are observed with a partial reconstruction
technique which uses the soft pion from the D^(*+/-) decay in association with
the reconstructed D_S^((*)+/-). The beam energy constraint is used to determine
the missing mass recoiling against the D_S^(+/-) system, showing a clear signal
for this process. From the observed rates, preliminary results for the
corresponding branching fractions have been obtained.


title:
Measurement of branching fractions for two-body charmless B decays to
  charged pions and kaons at BABAR

abstract:
  We present preliminary results of a search for charmless two-body B decays to
charged pions and kaons using data collected by the BABAR detector at the
Stanford Linear Accelerator Center's PEP-II storage ring. In a sample of 8.8
million produced B-anti-B pairs we measure the branching fractions B(B^0 -->
pi^+pi^-) = (9.3^{+2.6}_{-2.3}^{+1.2}_{-1.4}) x 10^{-6} and B(B^0 --> K^+\pi^-)
= (12.5^{+3.0}_{-2.6}^{+1.3}_{-1.7}) x 10^{-6}, where the first uncertainty is
statistical and the second is systematic. For the decay B^0 --> K^+K^- we find
no significant signal and set an upper limit of B(B^0 --> K^+K^-) < 6.6 x
10^{-6} at the 90% confidence level.


title: Measurements of charmless three-body and quasi-two-body B decays

abstract:
  We present preliminary results of a search for several exclusive charmless
hadronic B decays from electron-positron annihilation data collected by the
BABAR detector near the Y(4S) resonance. These include three-body decay modes
with final states h^{+/-}h^{-/+}h^{+/-} and h^{+/-}h^{-/+}pi^0, and
quasi-two-body decay modes with final states X^0 h and X^0 K0S, where h = pi or
K and X^0 = eta^' or omega. We find B(B^0 --> rho^(-/+)pi^(+/-)) =
(49+/-13^{+6}_{-5}) x 10^{-6} and B(B^+ --> eta^' K^+) = (62+/-18+/-8) x
10^{-6} and present upper limits for eight other decays.


title: Search for B^+ --> K^+l^+l^- and B^0 --> K^(*0)l^+l^-

abstract:
  Using a sample of 3.7 x 10^{6} Y(4S) --> B-anti-B events collected with the
BABAR detector at the PEP-II storage ring, we search for the electroweak
penguin decays B^+ --> K^+e^+e^-, B^+ --> K^+mu^+mu^-, B^0 --> K^{*0)e^+e^-,
and B^0 --> K^{*0)mu^+mu^-. We observe no significant signals for these modes
and set preliminary 90% C.L. upper limits of B(B^+ --> K^+e^+e^-) < 12.5 x
10^{-6}, B(B^+ --> K^+mu^+mu^-) < 8.3 x 10^{-6}, B(B^0 --> K^{*0)e^+e^-) < 24.1
x 10^{-6}, B(B^0 --> K^{*0)mu^+mu^-) < 24.5 x 10^{-6}.


title:
A measurement of the charged and neutral B meson lifetimes using fully
  reconstructed decays

abstract:
  Data collected with the BABAR detector at the PEP-II asymmetric B Factory at
SLAC are used to study the lifetimes of the B^0 and B^+ mesons. The data sample
consists of 7.4 fb-1 collected near the Y(4S) resonance. B^0 and B^+ mesons are
fully reconstructed in several exclusive hadronic decay modes to charm and
charmonium final states. The B lifetimes are determined from the flight length
difference between the two B mesons which are pair-produced in the Y(4S) decay.
The preliminary measurements of the lifetimes are tau_B0 =
1.506+/-0.052(stat)+/-0.029(syst) ps, tau_B+ =
1.602+/-0.049(stat)+/-0.035(syst) ps, and of their ratio is tau_B+/tau_B0 =
1.065+/-0.044(stat)+/-0.021(syst).


title: D-pi Production Correlations in 500 GeV pi- N Interactions

abstract:
  We study the charge correlations between charm mesons produced in 500 GeV pi-
N interactions and the charged pions produced closest to them in phase space.
With 110,000 fully reconstructed D mesons from experiment E791 at Fermilab, the
correlations are studied as functions of the D-pi - D mass difference and of
Feynman x. We observe significant correlations which appear to originate from a
combination of sources including fragmentation dynamics, resonant decays, and
charge of the beam.


title: Structure Functions at Very High Q^2 From HERA

abstract:
  Measurements of Deep-Inelastic Neutral and Charged current interactions are
presented in lepton proton scattering at HERA. The measurements are obtained
from taken during 1996 to 1999 and consists of $30 \rm{pb^{-1}}$ of $e^+p$ and
$16 \rm{pb^{-1}}$ of $e^-p$ data. The addition of the new high statistics
electron data with the positron data allows the first extraction of the parity
violating structure function $xF_3$ and tests of high-$Q^2$ electroweak effects
of the heavy bosons $Z^0$ and $W$ are observed and found to be consistent with
the Standard Model expectation.


title: Present and Future Oscillation Experiments at Reactors

abstract:
  This is a report on recent progress and developments since the NANP'99
Conference in current and future long baseline (~1 km) and very long baseline
(~100 - 800 km) oscillation experiments at reactors. These experiments, under
certain assumptions, can fully reconstruct the internal mass structure of the
electron neutrino and provide laboratory test of solar and atmospheric neutrino
problems.


title: Physics at a Neutrino Factory

abstract:
  In response to the growing interest in building a Neutrino Factory to produce
high intensity beams of electron- and muon-neutrinos and antineutrinos, in
October 1999 the Fermilab Directorate initiated two six-month studies. The
first study, organized by N. Holtkamp and D. Finley, was to investigate the
technical feasibility of an intense neutrino source based on a muon storage
ring. This design study has produced a report in which the basic conclusion is
that a Neutrino Factory is technically feasible, although it requires an
aggressive R&D program. The second study, which is the subject of this report,
was to explore the physics potential of a Neutrino Factory as a function of the
muon beam energy and intensity, and for oscillation physics, the potential as a
function of baseline.


title: Search for Large Extra Dimensions in Dielectron and Diphoton Production

abstract:
  We report a search for effects of large extra spatial dimensions in ppbar
collisions at a center-of-mass energy of 1.8 TeV with the DZero detector, using
events containing a pair of electrons or photons. The data are in good
agreement with the expected background and do not exhibit evidence for large
extra dimensions. We set the most restrictive lower limits to date, at the 95%
confidence level, on the effective Planck scale between 1.0 TeV and 1.4 TeV for
several formalisms and numbers of extra dimensions.


title: Determinations of |Vub| with inclusive techniques at LEP

abstract:
  The charmless semileptonic decay branching fraction has been measured, using
inclusive techniques, by the Aleph, Delphi and L3 experiments at LEP. The
average of their results is 1.74 +/- 0.37 +/- 0.38 +/- 0.21 10-3. From this
result the value of the |Vub| element in the CKM mixing matrix has been
derived, using OPE predictions, obtaining: |Vub| = (4.13 +0.42/-0.47
(stat.+det.) +0.43/-0.48 (b->c syst.) +0.24/-0.25 (b->u syst.) +/- 0.02 (taub)
+/- 0.20 (HQE)) 10-3.


title: The MONOLITH project

abstract:
  MONOLITH is a proposed massive (34 kt) magnetized tracking calorimeter at the
Gran Sasso laboratory in Italy, optimized for the detection of atmospheric muon
neutrinos. The main goal is to establish (or reject) the neutrino oscillation
hypothesis through an explicit observation of the full first oscillation swing.
The Delta m^2 sensitivity range for this measurement comfortably covers the
complete Super-Kamiokande allowed region. Other measurements include studies of
matter effects and the NC/CC and anti-nu/nu ratio, the study of cosmic ray
muons in the multi-TeV range, and auxiliary measurements from the CERN to Gran
Sasso neutrino beam. Depending on approval, data taking with part of the
detector could start in 2004. The detector and its performance are described,
and its potential later use as a neutrino factory detector is addressed.


title:
Observation of neutral current charm production in $\nu_{\mu}Fe$
  scattering at the Tevatron

abstract:
  We report on the first observation of open charm production in neutral
current deep inelastic neutrino scattering as seen in the NuTeV detector at
Fermilab. The production rate is shown to be consistent with a pure gluon-$%
Z^{0}$ boson production model, and the observed level of charm production is
used to determine the effective charm mass. As part of our analysis, we also
obtain a new measurement for the proton-nucleon charm production cross section
at $\sqrt{s}=38.8$ GeV.


title: Low-x Physics

abstract:
  Low-x physics is reviewed, with particular emphasis on searches for
deviations from GLAP evolution of the parton densities. Although there are
several intriguing indications, both in HERA and Tevatron data, as yet there is
no unambiguous evidence for other than standard next-to-leading-order GLAP
evolution. The framework of dipole models and saturation of parton densities is
examined and confronted with the data. Although such models give a good
qualitative description of the data, so do other, more conventional,
explanations.


title: Hadronic B Decays To Charm From CLEO

abstract:
  Recent results include the measurement of B->D(*)pi+pi-pi-pi0 decays, with
rates of ~1.8% observation of a significant omega pi^- substructure that
appears to result from the decay of the rho' resonance, whose mass and width we
determine as 1418 MeV and 382 MeV, respectively. Using B to charmonium decays
we find that the neutral B fraction in Y(4S) decays is nearly half, that the CP
asymmetries in J/\psi K^(-/+) and psi' K^(-/+) are small, and we also report on
the first observation of B->eta_c K.


title: ICANOE and OPERA experiments at the LNGS/CNGS

abstract:
  We discuss two experiments ICANOE and OPERA that have been proposed within
the context of long-baseline and atmospheric neutrino experiments in Europe.
The joint ICANOE/OPERA program aims at further improving our understanding of
the effect seen in atmospheric neutrinos. This program is based on (1) a
continuation of the observation of atmospheric neutrinos with the improved
technique of ICANOE/ICARUS (2) a sensitive numu->nue and numu->nutau appearance
program with the accelerator neutrinos coming from CERN (CNGS) from a distance
of 730 km.


title: The Ratio of Jet Cross Sections at s**(1/2)=630 GeV and 1800 GeV

abstract:
  The DO Collaboration has measured the inclusive jet cross section in
proton-antiproton collisions at s**2 = 630 GeV. The results for
pseudorapidities -0.5 to 0.5 are combined with our previous results at s**2 =
1800 GeV to form a ratio of cross sections with smaller uncertainties than
either individual measurement. Next-to-leading-order QCD predictions show
excellent agreement with the measurement at 630 GeV; agreement is also
satisfactory for the ratio. Specifically, despite a 10% to 15% difference in
the absolute normalization, the dependence of the ratio on jet transverse
momentum is very similar for data and theory.


title:
Does the KARMEN time anomaly originate from a beam-correlated
  background?

abstract:
  The time anomaly of neutrino events observed in the KARMEN detector at the
ISIS facility is discussed. We show that beam-correlated neutron events are not
completely suppressed by the KARMEN lower energy cut and could cause the
observed deviation of the measured time distribution from an exponential curve
with tau = 2.2 microseconds.


title: Experimental evidence for G.U.T. Proton Decay

abstract:
  Deep underground in Kolar Gold Fields, in southern India, an experiment to
detect proton decay had been carried out since the end of 1980. Analysis of
data yielded the following results; (l) the life time of proton is about 1 x
1031 years, (2) it decays into wide spectrum of decay modes, p -> e+ + pai0, p
->anti-nutrino + K+ and so on, and (3) the life time and the distribution of
decay modes are close to the predictions of SU(5) SUSY GUT. Four events
representing possibly neutron oscillation are also seen.


title: Muon Track Matching

abstract:
  For most physical processes the tracks observed in the muon stations must be
matched with the corresponding tracks in the inner tracker, the external muon
system providing muon identification and triggering but the tracker points
giving the precise momentum measurement at lower momenta. For high momenta the
momentum resolution is much improved by the interconnection of inner and outer
measurements. The matching of outer and inner measurements is more delicate in
case of muons embedded in jets. A study of the matching procedure was carried
out using samples of (b, anti b) jets at high Pt, requiring (b, anti b) -> mu
decays.


abstract:
  This document is an abridgement of the commemorative book prepared on the
occasion of the symposium "In Celebration of the Fixed Target Program with the
Tevatron" held at Fermilab on June 2, 2000. The full text with graphics
contains, in addition to the material here, a section for each experiment
including a "plain text" description, lists of all physics publications, lists
of all degree recipients and a photo from the archives. The full text is
available on the web at: http://conferences.fnal.gov/tevft/book/


title: Measurement of B(K -> pnn)

abstract:
  The experimental measurement of positive kaons decaying to a positive pion
and a neutrino, anti-neutrino pair (pnn) is reviewed. Recent results from
experiment E787 at BNL are presented: with data from 1995--97 the branching
ratio has been measured to be B(pnn) = (1.5^{+3.4}_{-1.2}) \times10^{-10}. The
future prospects for additional data in this mode are examined.


title: Future Kaon Programs at BNL and FNAL

abstract:
  Future kaon decay programs at BNL and FNAL are discussed. The primary focus
of these programs is the measurement of the golden modes, the neutral and
charged kaon decays to a pion and two neutrinos. The observation of the charged
mode by E787 at BNL is the first step in a series of measurements which will
completely determine the unitarity triangle within the kaon system.


title:
Tau Neutrinos Favored over Sterile Neutrinos in Atmospheric Muon
  Neutrino Oscillations

abstract:
  The previously published atmospheric neutrino data did not distinguish
whether muon neutrinos were oscillating into tau neutrinos or sterile
neutrinos, as both hypotheses fit the data. Using data recorded in 1100
live-days of the Super-Kamiokande detector, we use three complementary data
samples to study the difference in zenith angle distribution due to neutral
currents and matter effects. We find no evidence favoring sterile neutrinos,
and reject the hypothesis at the 99% confidence level. On the other hand, we
find that oscillation between muon and tau neutrinos suffices to explain all
the results in hand.


title: Search for massive rare particles with MACRO

abstract:
  Massive rare particles have been searched for in the penetrating cosmic
radiation using the MACRO apparatus at the Gran Sasso National Laboratories.
Liquid scintillators, streamer tubes and nuclear track detectors have been used
to search for magnetic monopoles (MMs).
  Based on no observation of such signals, stringent flux limits are
established for MMs as slow as a few 10^(-5)c. The methods based on the
scintillator and on the nuclear track subdetectors were also applied to search
for nuclearites. Preliminary results of the searches for charged Q-balls are
also presented.


title: New Limits on the Production of Magnetic Monopoles at Fermilab

abstract:
  First results from an experiment (Fermilab E882) searching for magnetically
charged particles bound to elements from the CDF and D{\O}detectors are
reported. The experiment is described, and limits on magnetic monopole pair
production cross sections for magnetic charges 1, 2, 3, and 6 times the Dirac
pole strength are presented. These limits ($\sim1$ pb), hundreds of times
smaller than those found in previous direct accelerator-based searches, use
simple model assumptions for the photonic production of monopoles, as does the
extraction of mass limits in the hundreds of GeV range.


title: ZZ Cross Section Measurements

abstract:
  Results on the cross section measurement of Z boson pair-production at LEP
are presented. The more general case of neutral-current four-fermion production
and the particular case of ZZ events enriched in b quarks are also discussed.
All the results agree with the Standard Model predictions.


title:
Using Thin Film Targets for Muonic Atoms and Muon Catalyzed Fusion
  Studies

abstract:
  Studies of muonic atoms and muon catalyzed fusion have been conventionally
done in a bulk target of gas, liquid or solid hydrogen isotopes. The use of
thin film targets developed at TRIUMF have notable advantages in tackling some
of the most important questions in the field, which could be further exploited
at future high intensity muon sources. We review the technique of the thin film
method with emphasis on recent results and a future proposal.


title: The Charge Distribution on the Cathode of a Straw Tube Chamber

abstract:
  We use Green's reciprocation theorem and the method of weighting fields to
deduce the charge distribution on the cathode of a straw tube proportional
chamber. The time dependence of the associated current is also discussed.


title: Observation of Anomalous Dimuon Events in the NuTeV Decay Detector

abstract:
  A search for long-lived neutral particles (N^0) which decay into at least one
muon has been performed using an instrumented decay channel at the E815 (NuTeV)
experiment at Fermilab. The decay channel was composed of helium bags
interspersed with drift chambers, and was used in conjunction with the NuTeV
neutrino detector to search for N^0 decays. The data were examined for
particles decaying into the muonic final states mu mu, mu e, and mu pi. Three
mu mu events were observed over an expected background of 0.040 +/- 0.009
events; no events were observed in the other modes. Although the observed
events share some characteristics with neutrino interactions, the observed rate
is a factor of 75 greater than expected. No Standard Model process appears to
be consistent with this observation.


title: Recent Results Addressing the KARMEN Timing Anomaly

abstract:
  Recent resuls from experiments at Fermilab and the Paul Scherrer Institute
have constrained the parameter space available for a hypothetical particle
$Q^0$ produced in the decay $\pi^+ \to \mu^+ Q^0$. This decay has been invoked
to explain a peculiar feature of an event arrival time distribution observed in
the KARMEN neutrino experiment.


title: Hadronic Structure Functions

abstract:
  Experimental results on hadronic structures are discussed in view of our
physics understanding. Achievements and challenges are noted.


title:
Search for Charged Higgs Bosons in e+e- Collisions at Centre-of-Mass
  Energies up to 202 GeV

abstract:
  A search for pair-produced charged Higgs bosons is performed with the L3
detector at LEP using data collected at centre-of-mass energies between 192 and
202 GeV, corresponding to an integrated luminosity of 233.2 pb^-1. Decays into
a charm and a strange quark or into a tau lepton and its neutrino are
considered. The observed events are consistent with the expectations from
Standard Model background processes. Including data taken at lower
centre-of-mass energies, lower limits on the charged Higgs mass are derived at
the 95% confidence level. They vary from 67.4 to 79.9GeV as a function of the
H^+/- --> tau nu branching ratio.


title:
First Observation of the Decays $B^{0}\to D^{*-}p\bar{p}\pi^{+}$ and
  B^{0}\to D^{*-}p\bar{n}$

abstract:
  We report the first observation of exclusive decays of the type B to D^* N
anti-N X, where N is a nucleon. Using a sample of 9.7 times 10^{6} B-Bbar pairs
collected with the CLEO detector operating at the Cornell Electron Storage
Ring, we measure the branching fractions B(B^0 \to D^{*-} proton antiproton
\pi^+) = ({6.5}^{+1.3}_{-1.2} +- 1.0) \times 10^{-4} and B(B^0 \to D^{*-}
proton antineutron) = ({14.5}^{+3.4}_{-3.0} +- 2.7) times 10^{-4}. Antineutrons
are identified by their annihilation in the CsI electromagnetic calorimeter.


title:
Ratios of Multijet Cross Sections in p-pbar Collisions at sqrt(s)=1.8
  TeV

abstract:
  We report on a study of the ratio of inclusive three-jet to inclusive two-jet
production cross sections as a function of total transverse energy in p-pbar
collisions at a center-of-mass energy sqrt{s} = 1.8 TeV, using data collected
with the D0 detector during the 1992-1993 run of the Fermilab Tevatron
Collider. The measurements are used to deduce preferred renormalization scales
in perturbative O(alpha_s^3) QCD calculations in modeling soft-jet emission.


title: Study of the process e+e- to pi+pi-pi+pi-pi0 with CMD-2 detector

abstract:
  The process e+e- to pi+ pi- pi+ pi- pi0 has been studied in the center of
mass energy range 1280 -- 1380 MeV using 3.0 1/pb of data collected with the
CMD-2 detector in Novosibirsk. Analysis shows that the cross section of the
five pion production is dominated by the contributions of the eta pi+pi- and
omega pi+pi- intermediate states.


title:
Intrinsic Radioactivity in a GSO Crystal and Limits on Double Beta Decay
  of Gd-160

abstract:
  Scintillating crystal detector offers potential advantages in low-energy
low-background experiments for particle physics and astrophysics. The GSO
crystal is an interesting detector to explore for future neutrino physics
experiments. The contributions to background due to the various channels of
intrinsic radio-isotopes from the Th-232 and U-238 series are identified and
studied with time-correlation analysis and detailed fits to the spectral shape.
Good agreement is achieved between measured and simulated spectra, indicating
background suppression factors to the 10^{-2} - 10^{-3} level are possible. The
procedures can be adopted for background understanding and suppression in other
low-count-rate experiments where the dominant source of background is from
internal radioactivity. Based on 1656 hours of data taking, limits on the
double beta decay half-life for the various channels in Gd-160 are presented.
The limit for the neutrinoless mode is T^{0 \nu \beta \beta}_{{1/2}} > 2.0(0.8)
X 10^{20} y at 68(90)% confidence level.


title: Charm Physics at Fermilab E791

abstract:
  Experiment 791 at Fermilab's Tagged Photon Laboratory has just accumulated a
high statistics charm sample by recording 20 billion events on 24000 8mm tapes.
A 500 GeV/c pi- beam was used with a fixed target and a magnetic spectrometer
which now includes 23 silicon fixed target and a magnetic spectrometer which
now includes 23 silicon microstrip planes for vertex reconstruction. A new data
acquisition system read out 9000 events/sec during the part of the Tevatron
cycle that delivered beam. Digitization and readout took 50 uS per event. Data
was buffered in eight large FIFO memories to allow continuous event building
and continuous tape writing to a wall of 42 Exabytes at 9.6 MB/sec. The 50
terabytes of data buffered to tape is now being filtered on RISC CPUs.
Preliminary results show D0 --> K- pi+ and D+ --> K- pi+ pi+ decays. Rarer
decays will be pursued.


title:
Asymmetries in the production of lambda zero, cascade minus, and omega
  minus hyperons in 500 GeV/c pi minus-Nucleon Interactions

abstract:
  Using data from Fermilab fixed-target experiment E791, we have measured
particle-antiparticle production asymmetries for lambda zero, cascade minus,
and omega minus hyperons in pi minus-nucleon interactions at 500 GeV/c. The
asymmetries are measured as functions of Feynman-x (x_F) and pt^2 over the
ranges of -0.12 GE x_F LE 0.12 and 0 GE pt^2 LE 4 (GeV/c)^2. We find
substantial asymmetries, even at x_F = 0. We also observe leading-particle-
type asymmetries which qualitatively agree with theoretical predictions.


title: A Study of One-Prong Tau Decays with a Charged Kaon

abstract:
  From an analysis of the ionisation energy loss of charged particles selected
from 110326 e+e- -> tau+tau- candidates recorded by the OPAL detector at e+e-
centre-of-mass energies near the Z0 resonance, we determine the one-prong tau
decay branching ratios:
  Br(tau- -> nu_tau K- >=0h0) = 1.528 +- 0.039 +- 0.040 %
  Br(tau- -> nu_tau K-) = 0.658 +- 0.024 +- 0.029 % where the h0 notation
refers to a pi0, an eta, a K^0_S, or a K^0_L, and where the first uncertainty
is statistical and the second is systematic.


title:
Measurement of the Mass and Width of the W Boson in e+e- Collisions at
  189 GeV

abstract:
  The mass and width of the W boson are determined in e+e- collisions at LEP
using 183 pb^-1 of data recorded at a centre-of-mass energy roots=189 GeV with
the OPAL detector. The invariant mass distributions from 970 WW->qqqq and 1118
WW->qqln candidate events are used to measure the mass of the W boson,
  Mw = 80.451 +- 0.076(stat.) +- 0.049(syst.) GeV.
  A direct measurement of the width of the W boson gives Gw=2.09 +- 0.18(stat.)
+- 0.09(syst.) GeV. The results are combined with previous OPAL results from 78
pb^-1 of data recorded with roots from 161 to 183 GeV, to obtain:
  Mw = 80.432 +- 0.066(stat.) +- 0.045(syst.) GeV,
  Gw = 2.04 +- 0.16(stat.) +- 0.09(syst.) GeV.
  The consistency of the direct measurement of Mw with that inferred from other
measurements of electroweak parameters provides an important test of the
Standard Model of electroweak interactions.


title:
WW Production Cross Section and W Branching Fractions in e+e- Collisions
  at 189 GeV

abstract:
  From a data sample of 183 pb^-1 recorded at a center-of-mass energy of roots
= 189 GeV with the OPAL detector at LEP, 3068 W-pair candidate events are
selected. Assuming Standard Model W boson decay branching fractions, the W-pair
production cross section is measured to be sigmaWW = 16.30 +- 0.34(stat.) +-
0.18(syst.) pb. When combined with previous OPAL measurements, the W boson
branching fraction to hadrons is determined to be 68.32 +- 0.61(stat.) +-
0.28(syst.) % assuming lepton universality. These results are consistent with
Standard Model expectations.


title: A Measurement of the Rate of Charm Production in W Decays

abstract:
  Using data recorded at centre-of-mass energies around 183 GeV and 189 GeV
with the OPAL detector at LEP, the fundamental coupling of the charm quark to
the W boson has been studied. The ratio Rc^W = Gamma(W -> cX)/Gamma(W ->
hadrons) has been measured from jet properties, lifetime information, and
leptons produced in charm decays. A value compatible with the Standard Model
expectation of 0.5 is obtained: Rc^W = 0.481 +- 0.042(stat.) +- 0.032(syst.).
By combining this result with measurements of the W boson total width and
hadronic branching ratio, the magnitude of the CKM matrix element Vcs is
determined to be |Vcs| = 0.969 +- 0.058.


title:
Measurement of W boson polarisations and CP-violating triple gauge
  couplings from W+W- production at LEP

abstract:
  Measurements are presented of the polarisation of W+W- boson pairs produced
in e+e- collisions, and of CP-violating WWZ and WWGamma trilinear gauge
couplings. The data were recorded by the OPAL experiment at LEP during 1998,
where a total integrated luminosity of 183 pb^-1 was obtained at a
centre-of-mass energy of 189 GeV. The measurements are performed through a spin
density matrix analysis of the W boson decay products. The fraction of W bosons
produced with longitudinal polarisation was found to be sigma_L/sigma_total =
(21.0 +- 3.3 +- 1.6)% where the first error is statistical and the second
systematic. The joint W boson pair production fractions were found to be
sigma_TT/sigma_total = (78.1 +- 9.0 +- 3.2) %, sigma_LL/sigma_total = (20.1 +-
7.2 +- 1.8) % and sigma_TL/sigma_total = (1.8 +- 14.7 +- 3.8) %. In the
CP-violating trilinear gauge coupling sector we find kappa_z = -0.20 +0.10
-0.07, g^z_4 = -0.02 +0.32 -0.33 and lambda_z = -0.18 +0.24 -0.16, where errors
include both statistical and systematic uncertainties. In each case the
coupling is determined with all other couplings set to their Standard Model
values except those related to the measured coupling via SU(2)_LxU(1)_Y
symmetry. These results are consistent with Standard Model expectations.


title:
Measurement of triple gauge boson couplings from WW production at LEP
  energies up to 189 GeV

abstract:
  A measurement of triple gauge boson couplings is presented, based on W-pair
data recorded by the OPAL detector at LEP during 1998 at a centre-of-mass
energy of 189 GeV with an integrated luminosity of 183 pb^-1. After combining
with our previous measurements at centre-of-mass energies of 161-183 GeV we
obtain k_g=0.97 +0.20 -0.16, g_1^z=0.991 +0.060 -0.057 and lambda_g=-0.110
+0.058 -0.055, where the errors include both statistical and systematic
uncertainties and each coupling is determined by setting the other two
couplings to their SM values. These results are consistent with the Standard
Model expectations.


title: Beam Test Results of the BTeV Silicon Pixel Detector

abstract:
  The results of the BTeV silicon pixel detector beam test carried out at
Fermilab in 1999-2000 are reported. The pixel detector spatial resolution has
been studied as a function of track inclination, sensor bias, and readout
threshold.


title: Developments in Rare Kaon Decay Physics

abstract:
  We review the current status of the field of rare kaon decays. The study of
rare kaon decays has played a key role in the development of the standard
model, and the field continues to have significant impact. The two areas of
greatest import are the search for physics beyond the standard model and the
determination of fundamental standard-model parameters. Due to the exquisite
sensitivity of rare kaon decay experiments, searches for new physics can probe
very high mass scales. Studies of the k->pnn modes in particular, where the
first event has recently been seen, will permit tests of the standard-model
picture of quark mixing and CP violation.


title: Photon Structure

abstract:
  The structure of the photon is probed in photon-photon interactions at LEP
and in photon-proton interactions at HERA.


title:
Experimental Status of Semileptonic B Decays - Recent Results from LEP
  and Comparisons with Y(4S) Experiments

abstract:
  Recent analyses of the LEP and Y(4S) data have better outlined the picture of
semileptonic B decays. Results on inclusive and exclusive decay branching
fractions and on the extraction of the Vub and Vcb elements of the CKM mixing
matrix are discussed, together with some of the still open questions and the
sources of model systematics.


title:
Review of Recent Searches for Rare and Forbidden Dilepton Decays of
  Charmed Mesons

abstract:
  I briefly review the results of recent searches for flavor-changing neutral
current and lepton-flavor and lepton-number violating decays of D+, Ds, and D0
mesons (and their antiparticles) into modes containing muons and electrons. The
primary focus is the results from Fermilab charm hadroproduction experiment
E791. E791 examined 24 pi,l,l and K,l,l decay modes of D+ and Ds and l+l- decay
modes of D0. Limits presented by E791 for 22 rare and forbidden dilepton decays
of D mesons were more stringent than those obtained from previous searches, or
else were the first reported.


title: Design and Construction of the 3.2 Mev Cathode Assembly for Darht II

abstract:
  A 3.2 MeV injector has been designed and built for the Darht II Project at
Los Alamos Lab. The installation of the complete injector system is nearing
completion at this time. The requirements for the injector are to produce a 3.2
MeV, 2000 ampere electron pulse with a flattop width of at least 2-microseconds
and emittance of less than 0.15 p cm-rad normalized. A 16.5 cm diameter hot
emitter cathode is used. This paper will describe the design and fabrication of
major Cathode Assembly components and test performance of subsystems to date.
Mechanical and thermal issues will be emphasized. More detailed discussion of
the active alignment system used to maintain the stringent cathode alignment
requirement.


title: Improved Measurement of the Positive Muon Anomalous Magnetic Moment

abstract:
  A new measurement of the positive muon's anomalous magnetic moment has been
made at the Brookhaven Alternating Gradient Synchrotron using the direct
injection of polarized muons into the superferric storage ring. The angular
frequency difference omega_{a} between the angular spin precession frequency
omega_{s} and the angular orbital frequency omega_{c} is measured as well as
the free proton NMR frequency omega_{p}. These determine
  R = omega_{a} / omega_{p} = 3.707~201(19) times 10^{-3}. With mu_{mu} /
mu_{p} = 3.183~345~39(10) this gives a_{mu^+} = 11~659~191(59) times 10^{-10}
(pm 5 ppm), in good agreement with the previous CERN and BNL measurements for
mu^+ and mu^-, and with the standard model prediction.


title: Search for the Decay Kl -> pi0 e+ e-

abstract:
  We report on a search for the decay Kl -> pi0 e+ e- carried out by the
KTeV/E799 experiment at Fermilab. This decay is expected to have a significant
CP violating contribution and the measurement of its branching ratio could
support the CKM mechanism for CP violation or could point to new physics. Two
events were observed in the 1997 data with an expected background of 1.06
+-0.41 events, and we set an upper limit Br(Kl -> pi0 e+ e-) < 5.1 x 10^-10 at
the 90% confidence level.


title: Quasi-coherent interaction of protons with Si28 at Tp=1GeV

abstract:
  The total, elastic and inelastic cross-sections for quasi-coherent
interactions of protons with Si28 have been measured using hadron-gamma
coincidence method at the energy 1 GeV. The limits for the existence of
long-lived excited states of the Si28 nucleus have been obtained in the range
of energies from 0 to 0.8 GeV.


title:
A New Measurement of the Radiative Ke3 Branching Ratio and Photon
  Spectrum

abstract:
  We present a preliminary report on a new measurement of the radiative neutral
Ke3 branching ratio and the first study of the photon spectrum in this decay.
We find BR(Ke3g, E*_g>30 GeV, Th*_eg>20 deg)/BR(Ke3) =
0.911+-0.009(stat)+0.021-0.010(syst)%. Our measurement of the spectrum is
consistent with inner bremsstrahlung only as the source of photons at the 2
sigma level.


title: Photon Structure and Quantum Fluctuation

abstract:
  Photon structure derives from quantum fluctuation in quantum field theory to
fermion and anti-fermion, and has been an experimentally established feature of
electrodynamics since the discovery of the positron. In hadronic physics, the
observation of factorisable photon structure is similarly a fundamental test of
the quantum field theory Quantum Chromodynamics (QCD). An overview of
measurements of hadronic photon structure in e+e- and ep interactions is
presented, and comparison made with theoretical expectation, drawing on the
essential features of photon fluctuation into quark and anti-quark in QCD.


title:
Measurement of the Angular Distribution of Electrons from W->e nu Decays
  Observed in ppbar Collisions at sqrt(s)=1.8 TeV

abstract:
  We present the first measurement of the electron angular distribution
parameter alpha_2 in W to e nu events produced in proton-antiproton collisions
as a function of the W boson transverse momentum. Our analysis is based on data
collected using the D0 detector during the 1994--1995 Fermilab Tevatron run. We
compare our results with next-to-leading order perturbative QCD, which predicts
an angular distribution of (1 +/- alpha_1 cos theta* + alpha_2 cos^2 theta*),
where theta* is the polar angle of the electron in the Collins-Soper frame. In
the presence of QCD corrections, the parameters alpha_1 and alpha_2 become
functions of p_T^W, the W boson transverse momentum. This measurement provides
a test of next-to-leading order QCD corrections which are a non-negligible
contribution to the W boson mass measurement.


title: Measurement of $A_c$ with Charmed Mesons at SLD

abstract:
  We present a direct measurement of the parity-violation parameter $A_c$ in
the coupling of the $Z^0$ to $c$-quarks with the SLD detector. The measurement
is based on a sample of 530k hadronic $Z^0$ decays, produced with a mean
electron-beam polarization of $|P_e| = 73 %$. The tagging of $c$-quark events
is performed using two methods: the exclusive reconstruction of $D^{\ast+}$,
$D^+$, and $D^0$ mesons, and the soft-pions ($\pi_s$) produced in the decay of
$D^{\ast+}\to D^0 \pi_s^+$. The large background from $D$ mesons produced in
$B$ hadron decays is separated efficiently from the signal using precision
vertex information. The combination of these two methods yields $A_c = 0.688
\pm 0.041.$


title:
Measurements of the parameters of the $\phi(1020)$ resonance through
  studies of the processes $e^+e^- \to K^+K^-$, $K_SK_L$ and $\pi^+\pi^-\pi^0$

abstract:
  The cross sections of the processes $e^+e^- \to K^+K^-$, $e^+e^- \to K_SK_L$
and $e^+e^- \to \pi^+\pi^-\pi^0$ were measured in the SND experiment at the
VEPP-2M collider in the energy region near the $\phi(1020)$ meson. These
measurements were based on about $10^6$ $K^+K^-$, $0.5 \times 10^6$ $K_SK_L$
and $0.4 \times 10^6$ $\pi^+\pi^-\pi^0$ selected events. Themeasured cross
sections have been analyzed in the framework of the vector meson dominance
model and the main parameters of the $\phi$-resonance were obtained, such as
its mass, width, the production cross section and branching ratios of the main
decay modes. The measured value of the $\phi$ meson total width, $\Gamma_{\phi}
= 4.21 \pm 0.04$ is lower than the present world average of $4.458 \pm 0.032$
MeV. Contributions in addition to the conventional vector meson dominance model
were found in the $e^+e^- \to \pi^+\pi^-\pi^0$ reaction cross section.


title: Search for Direct CP Violation in $\Xi$ Hyperon Decay

abstract:
  Using data collected with the CLEO II detector we have performed a search for
direct CP violation in the $\Xi$ hyperon system. CP violation gives rise to an
asymmetry, A, between the parity-violating angular distributions of the decay
chains $\Xi^- \To \Lambda pi^-$, $\Lambda \To p \pi^-$ and $\bar{\Xi}^+ \To
\bar{\Lambda} \pi^+$, $\bar{\Lambda} \To \bar{p} \pi^+$. In the Standard Model,
A is expected to be in the range $10^{-4}$ to $10^{-5}$. If CP violation were
found at a higher level it could indicate the presence of new physics. We find
no evidence for CP violation: A = -0.057 +- 0.064 +- 0.039. We also obtain
$A_{\Xi} = -0.070 +- 0.064 +- 0.045$ and $\alpha_{\bar{\Xi}}=
0.49^{+0.06}_{-0.05} +- 0.10$.


title: Mini-Review on Extra Dimensions

abstract:
  One of the most stimulating recent ideas in particle physics involves a
possibility that our universe has additional compactified spatial dimensions,
perhaps as large as 1 mm. In this mini-review, we discuss the results of recent
experimental searches for such large extra dimensions.


title: Bose-Einstein Correlations in W-pair evets at LEP

abstract:
  An overview of measurements of Bose-Einstein correlations in W-pair events at
LEP is given. The results presented are based on data collected at
centre-of-mass energies between 172 and 202GeV. The review concentrates on the
search for Bose-Einstein correlations between pions from different W's in e+e-
-> W+W- -> qqbarqqbar events. No agreement is reached in the results of the
four experiments.


title:
First Observation of the Sigma_c^{*+} Charmed Baryon, and New
  Measurements of the Sigma_c^0, Sigma_c^+, Sigma_c^{++}, and Omega_c^0 Charmed
  Baryons

abstract:
  Using ~13.7 fb^{-1} of e^+e^- collision data recorded at near the Upsilon(4S)
resonance by the CLEO II and CLEO II.V detector configurations on the Cornell
Electron Storage Ring, we present the world's most precise measurements of the
Sigma_c^0, Sigma_c^+, and Sigma_c^{++} charmed-baryon masses as well as the
first measurements of the intrinsic widths of the Sigma_c^0 and Sigma_c^{++}
baryons. We also report on the first observation and mass measurement of the
Sigma_c^{*+} charmed baryon, M(Sigma_c^{*+}) - M(Lambda_c^+) = (231.0 +-
1.1[stat] +- 2.0[syst]) MeV/c^2, and the first CLEO observation of the
Omega_c^0 baryon, for which we measure a mass M(Omega_c^0) = (2694.6 +-
2.6[stat] +- 1.9[syst]) MeV/c^2 from a sample of (40.4 +- 9.0[stat]) candidate
events. All new results are preliminary.


title:
Measurements of F_2 and xF_3(nu)-xF_3(nubar) from CCFR nu_mu-Fe and
  nubar_mu-Fe data in a physics model independent way

abstract:
  We report on the extraction of the structure functions F_2 and Delta xF_3 =
xF_3(nu)-xF_3(nubar) from CCFR nu_mu-Fe and nubar_mu-Fe differential cross
sections. The extraction is performed in a physics model independent (PMI) way.
This first measurement of Delta xF_3, which is useful in testingmodels of heavy
charm production, is higher than current theoretical predictions. The ratio of
the F_2(PMI) values measured in nu_mu and nubar_mu scattering is in agreement
(within 5%) with the predictions of NLO PDFS using massive charm production
schemes, thus resolvin long-standing discrepancy between the two sets of data.


title: ADC common noise correction and zero suppression in the PIBETA detector

abstract:
  We describe a simple procedure for reducing ADC common noise in modular
detectors that does not require additional hardware. A method using detector
noise groups should work well for modular particle detectors such as segmented
electromagnetic calorimeters, plastic scintillator hodoscopes, cathode strip
wire chambers, segmented active targets, and the like. We demonstrate a
``second pedestal noise correction'' method by comparing representative ADC
pedestal spectra for various elements of the PIBETA detector before and after
the applied correction.


title: The Hadronic Picture of the Photon

abstract:
  The hadronic interactions of the photon are studied in terms of new
measurements of the total hadronic cross section and di-jet production in
photon-photon collisions at LEP2.


title: Study of $\chi_{c1}$ and $\chi_{c2}$ Meson Production in B Meson Decays

abstract:
  Using a sample of 9.7 million B meson pairs collected with the CLEO detector,
we study B decays to the chi_c1 and chi_c2 charmonia states, which are
reconstructed via their radiative decays to J/psi. We first measure the
branching fraction for inclusive chi_c1 production in B decays to be
Br(B->chi_c1 X)=(4.14+-0.31+-0.40)*10^-3, where the first uncertainty is
statistical and the second one is systematic. We derive the branching fractions
for direct chi_c1 and chi_c2 production in B decays by subtracting the known
contribution of the decay chain B->psi(2S)X with psi(2S)->chi_c1,2 gamma. We
obtain Br[B->chi_c1(direct) X]=(3.83+-0.31+-0.40)*10^-3. No statistically
significant signal for chi_c2 production is observed in either case. Using the
Feldman-Cousins approach, we determine the 95% confidence intervals to be [0.2,
2.0]*10^-3 for Br(B->chi_c2 X), [0.0,1.7]*10^-3 for Br[B->chi_c2(direct) X],
and [0.00,0.44] for the ratio Br[B->chi_c2(direct) X]/Br[B->chi_c1(direct) X].
We also measure the branching ratio Br[B->chi_c2(direct)
X_s]/Br[B->chi_c1(direct) X_s] for different X_s configurations by
reconstructing B decays into exclusive final states with J/psi, a photon, a
kaon, and up to four pions. For all the X_s configurations we observe a strong
chi_c1 signal yet no statistically significant chi_c2 signal. We discuss how
our results compare with theoretical predictions in different models of
charmonium production.


title: New Results from CLEO

abstract:
  The latest results from the CLEO collaboration are summarized. An update on
the status of the upgraded CLEO III detector is also included.


title: Charged Kaons at the Main Injector (CKM)

abstract:
  The CKM collaboration is proposing to measure the branching ratio of the rare
K decay (K+ --> pi+ nu nubar) at the Main Injector at Fermilab. Our goal is to
be able to observe about 100 events, for a Standard Model branching ratio of
about 1.0E-10. This implies that we must be able to reduce the background to a
few events.


title: Recent Results from the BNL E787 Experiment

abstract:
  Recent results from a rare kaon decay experiment E787 at the BNL-AGS on K^+
\to \pi^+ \nu \bar\nu, K^+ \to \mu^+ \nu \gamma, and K^+ \to \pi^+ \pi^0 \gamma
decays are reported.


title:
Search for direct production of a2(1320) and f2(1270) mesons in e+e-
  annihilation

abstract:
  A search for direct production of C-even resonances a2(1320) and f2(1270) in
e+e- annihilation was performed with SND detector at VEPP-2M e+e- collider. The
upper limits of electronic widths of these mesons were obtained at 90%
confidence level:
  Gamma(a2(1320) \to e+e-) < 0.56 eV,
  Gamma(f2(1270) \to e+e-) < 0.11 eV.


title: Recent results from SELEX

abstract:
  Preliminary results on asymmetry for Lc produced by Sigma-,pi- and p beams at
xf>0.2 and precise measurements of the Lc,D0 and Ds lifetimes are presented.


title: Top Physics from Run 1 and Run 2 Prospects at CDF

abstract:
  We present a summary of top quark physics results from Run 1 at CDF using the
Run 1 data sample of 106 pb$^{-1}$. In addition to the precursory measurements
of the top quark mass and $\ttbar$ cross section, we have performed a number of
other analyses which test the consistency of the $\ttbar$ data sample with the
standard model (SM). Deviations from SM expectations could provide hints for
new physics. We find that the data are consistent with the SM. While the Run 1
data are statistically limited, we have shown that the systematic uncertainties
are under control and thus have layed the groundwork for higher precision tests
of the SM in Run 2. This report describes the Run 1 top quark analyses and
expectations and prospects for top quark measurements in Run 2.


title:
Measurement of B0 and B+ lifetimes and B0-antiB0 mixing with fully
  reconstructed B decays in BaBar

abstract:
  Time-dependent B0-antiB0 flavor oscillations and B0 and B+ lifetimes are
studied in a sample of fully reconstructed B mesons collected with the BaBar
detector, running at the PEP-II asymmetric e+e- B Factory with center-of-mass
energies near the Upsilon(4S) resonance. This is the first time that
time-dependent mixing and lifetime measurements have been performed at
Upsilon(4S) energies.


title:
Combined results on b-hadron production rates, lifetimes, oscillations
  and semileptonic decays

abstract:
  Combined results on b-hadron lifetimes, b-hadron production rates, B^0_d -
\bar{B^0_d} and B^0_s -\bar{B^0_s} oscillations, the decay width difference
between the mass eigenstates of the B^0_s -\bar{B^0_s} system, and the values
of the CKM matrix elements | V_cb | and \Vert V_ub | are obtained from
published and preliminary measurements available in Summer 99 from the ALEPH,
CDF, DELPHI, L3, OPAL and SLD Collaborations.


title:
Event-by-event fluctuations of the kaon to pion ratio in central Pb+Pb
  collisions at 158 GeV per Nucleon

abstract:
  We present the first measurement of fluctuations from event to event in the
production of strange particles in collisions of heavy nuclei. The ratio of
charged kaons to charged pions is determined for individual central Pb+Pb
collisions. After accounting for the fluctuations due to detector resolution
and finite number statistics we derive an upper limit on genuine
non-statistical fluctuations, perhaps related to a first or second order QCD
phase transition. Such fluctuations are shown to be very small.


title: mb from ALEPH and comparison with other LEP experiments

abstract:
  I will review the measurements of the $b$-quark mass performed by ALEPH and
DELPHI. A large set of observables has been used together with detailed studies
on jet algorithms. Very clear effects due to the $b$-quark mass running are
observed. Comparing with the determinations at the $\Upsilon(4S)$ threshold,
the measurements of the running $b$-quark mass at the $Z$ pole are consistent
with the predicted evolution from QCD.


title: Search for the Decay K+ -> pi+ pi0 nu nubar

abstract:
  The first search for the decay K^+ -> pi^+ pi^0 nu nubar has been performed
with the E787 detector at BNL. Based on zero events observed in the kinematical
search region defined by 90 MeV/c < P_{pi^+} < 188 MeV/c and 135 MeV < E_{pi^0}
< 180 MeV, an upper limit B(K^+ -> pi^+ pi^0 nu nubar) < 4.3 x 10^{-5} at 90%
confidence level is established.


title: MiniBooNE: Status of the Booster Neutrino Experiment

abstract:
  MiniBooNE is preparing to search for nu_mu to nu_e oscillations at Fermilab.
The experiment is designed to make a conclusive statement about LSND's neutrino
oscillation evidence. We give a status report on the preparation of the
experiment and outline the experimental prospects.


title: CLEO Results on Heavy Meson Mixing

abstract:
  We discuss recent CLEO results on D0-D0bar and B0d-B0dbar mixing. The
principal results are that for the D0 system, allowing for CP violations, the
mixing amplitude x'<2.9% (95% C.L.), and for the B0d system,
chi=0.198+-0.013+-0.014. We make projections for future sensistivity to
D0-D0bar mixing, and to sin(2*beta+gamma).


title: Study of the CP asymmetry of B0 -> J/psi K0S decays in ALEPH

abstract:
  The decay B0 -> J/psi K0_S is reconstructed with J/psi -> e+ e- or mu+ mu-
and K0_S -> pi+ pi-. From the full ALEPH dataset at LEP1 of about 4 million
hadronic Z decays, 23 candidates are selected with an estimated purity of 71%.
They are used to measure the CP asymmetry of this decay, given by sin 2beta in
the Standard Model, with the result sin 2beta = 0.84 +0.82-1.04 +-0.16. This is
combined with existing measurements from other experiments, and increases the
confidence level that CP violation has been observed in this channel to 98%.


title:
A search for resonance decays to antineutrino-jet in e^+p scattering at
  HERA

abstract:
  A study of the antineutrino-jet mass spectrum in e^+p -> antineutrino+X
events at center-of-mass energy 300 GeV has been performed with the ZEUS
detector at HERA using an integrated luminosity of 47.7 pb^-1. The mass
spectrum is in good agreement with that expected from Standard Model processes
over the antineutrino -jet mass range studied. No significant excess
attributable to the decay of a narrow resonance is observed. By using both e^+p
-> e^+ X and e^+p -> antineutrino X data, mass-dependent limits are set on the
s-channel production of scalar and vector resonant states. Couplings to
first-generation quarks are considered and limits are presented as a function
of the e^+q and antineutrino-q branching ratios. These limits are used to
constrain the production of leptoquarks and R-parity violating squarks.


title: Future Atmospheric Neutrino Detectors

abstract:
  Future experiments focusing on atmospheric neutrino detection are reviewed.
One of the main goals of these experiments is the detection of an unambiguous
oscillation pattern (nu_mu reappearance) to prove the oscillation hypothesis.
Further goals include the discrimination of nu_mu - nu_tau and nu_mu -
nu_sterile oscillations, and the detection of a potential small nu_mu - nu_e
contribution. The search for matter effects in three or more flavour
oscillations can be used to constrain hybrid oscillation models and potentially
measure the sign of delta m^2. The detectors and measurement techniques
proposed to achieve these goals are described, and their physics reach is
discussed.


title: New Measurements of Nucleon Structure Functions from CCFR/NuTeV

abstract:
  We report on the extraction of the structure functions F_2 and Delta xF_3 =
xF_3nu-xF_3nub from CCFR neutrino-Fe and antineutrino-Fe differential cross
sections. The extraction is performed in a physics model independent (PMI) way.
This first measurement for Delta xF_3, which is useful in testing models of
heavy charm production, is higher than current theoretical predictions. Within
5% the F_2 (PMI) values measured in neutrino and muon scattering are in
agreement with the predictions of Next-to-Leading-Order PDFs (using massive
charm production schemes), thus resolving the long-standing discrepancy between
the two measurements.


title: Design and Construction of the 3.2 Mev High Voltage Column for Darht II

abstract:
  A 3.2 MeV injector has been designed and built for the Darht II Project at
Los Alamos Lab. The installation of the complete injector system is nearing
completion at this time. The requirements for the injector are to produce a 3.2
MeV, 2000 ampere electron pulse with a flattop width of at least 2-microseconds
and emittance of less than 0.15 p cm-rad normalized. A large high voltage
column has been built and installed. The column is vertically oriented, is 4.4
meters long, 1.2 meters in diameter, and weights 5700 kilograms. A novel method
of construction has been employed which utilizes bonded mycalex insulating
rings. This paper will describe the design, construction, and testing completed
during construction. Mechanical aspects of the design will be emphasized.


title: Low-background applications of MICROMEGAS detector technology

abstract:
  The MICROMEGAS detector concept, generally optimized for use in accelerator
experiments, displays a peculiar combination of features that can be
advantageous in several astroparticle and neutrino physics applications. Their
sub-keV ionization energy threshold, excellent energy and space resolution, and
a simplicity of design that allows the use of radioclean materials in their
construction are some of these characteristics. We envision tackling
experimental challenges such as the measurement of neutral-current
neutrino-nucleus coherent scattering or Weakly Interacting Massive Particle
(WIMP) detectors with directional sensitivity. The large physics potential of a
compact (total volume O(1)m$^{3}$), multi-purpose array of low-background
MICROMEGAS is made evident.

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


title: Direct measurement of Ab at the Z0 pole using a lepton tag

abstract:
  We present a direct measurement of the parity violation parameter Ab, derived
from the left-right forward-backward asymmetry of b quarks tagged via leptons
from semileptonic decays. The lepton identification algorithm combines
information from tracking, calorimetry and from the SLD Cherenkov Ring Imaging
Detector. The value of Ab is extracted using a maximum likelihood fit to the
differential cross section for fermion production. Vertexing information and
decay kinematics have been used to discriminate among the different sources of
tagged leptons. A new treatment of mixing effects and of background
contamination has been introduced and a new vertexing algorithm has been used
in the muon analysis. Based on the 1993-1998 SLD sample of 550K hadronic Z0
decays with highly polarized electron beams, we have measured Ab with a ~3%
statistical error.


title: Tagging Two-Photon Production at the LHC

abstract:
  Tagging two-photon production offers a significant extension of the LHC
physics programme. Effective luminosity of high-energy gamma-gamma collisions
reaches 1% of the proton-proton luminosity and the standard detector techniques
used for measuring very forward proton scattering should allow for a reliable
extraction of interesting two-photon interactions. Particularly exciting is a
possibility of detecting two-photon exclusive Higgs boson production at the
LHC.


title: Power correction analyses in e+e- annihilation

abstract:
  The current status of theoretical work and experimental analyses on power
corrections in QCD for e+e- annihilation will be reviewed. Measurements of the
number of active quark flavours n_f and the QCD colour factors C_A and C_F
derived from QCD fits to event shape distributions at lower energies and LEP
energies will be presented. The fits are based on O(alpha_s^2)+NLLA QCD
predictions with power corrections to model hadronisation.


title: Measurement of dsigma/dy for high mass Drell-Yan e+e- Pairs at CDF

abstract:
  We report on the first measurement of the rapidity distribution dsigma/dy
over nearly the entire kinematic region of rapidity for e+e- pairs in the
Z-boson region of 66<M_ee<116 GeV/c2 and at higher mass M_ee>116 GeV/c2. The
data sample consists of 108 pb-1 of pbar-p collisions at sqrt{s}=1.8 TeV taken
by the Collider Detector at Fermilab during 1992--1995. The total cross section
in the Z-boson region is measured to be 252 +- 11 pb. The measured total cross
section and dsigma/dy are compared with quantum chromodynamics calculations in
leading and higher orders.


title: Recent structure function results from neutrino scattering at Fermilab

abstract:
  We report on the extraction of the structure functions F_2 and Delta xF_3 =
xF_3(nu)-xF_3(nubar) from CCFR nu_mu-Fe and nubar_mu-Fe different ial cross
sections. The extraction is performed in a physics model independent (PMI) way.
This first measurement of Delta xF_3, which is useful in testing models of
heavy charm production, is higher than current theoretical predictios. The
ratio of the F_2 (PMI) values measured in nu_mu and mu scattering is in
agreement (within 5%) with the NLO predictions using massive charm production
schemes, thus resolving the long-standing discrepancy between the two sets of
data. In addition, measurements of F_L (or, equivalently, R) and 2xF_1 are
reported in the kinematic region where anomalous nuclear effects in R are
observed at HERMES.


title: Search for Rare and Forbidden Charm Meson Decays at Fermilab E791

abstract:
  We report the results of a blind search for flavor-changing neutral current,
lepton-flavor violating, and lepton-number violating decays of D+, D(s)+, and
D0 mesons (and their antiparticles) into modes containing muons and electrons.
Using data from Fermilab charm hadroproduction experiment E791, we examine the
pi l l and K l l decay modes of D+ and D(s)+ and the l+ l- decay modes of D0.
No evidence for any of these decays is found. Therefore, we present
branching-fraction upper limits at 90% confidence level for the 24 decay modes
examined. Eight of these modes have no previously reported limits, and fourteen
are reported with significant improvements over previously published results.


title: Measurements of Parity-Violation Parameters at SLD

abstract:
  We present direct measurements of the parity-violation parameters $A_b$,
$A_c$, and $A_s$ at the $Z^0$ resonance with the SLD detector. The measurements
are based on approximately 530k hadronic $Z^0$ events collected in 1993-98.
Obtained results are $A_b = 0.914\pm0.024$ (SLD combined: preliminary), $A_c =
0.635\pm0.027$ (SLD combined: preliminary), and $A_s = 0.895\pm0.066(stat.)\pm
0.062(sys.)$.


title:
Study of Z Boson Pair Production in e^+e^- Interactions at \sqrt{s}=192
  - 202 GeV

abstract:
  The cross section for the production of Z boson pairs is measured using the
data collected by the L3 detector at LEP in 1999 in e^+e^- collisions at
centre-of-mass energies ranging from 192 GeV up to 202 GeV. Events in all the
visible final states are selected, measuring the cross section of this process.
The special case of final states containing b quarks is also investigated. All
results are in agreement with the Standard Model predictions.


title: Measurements of the bottom quark mass

abstract:
  I will review new measurements of the b quark mass, presented at this
conference by ALEPH and DELPHI. A large set of observables has been used and
detailed studies on jet algorithms have been performed. These measurements at
the Z peak are consistent with the results obtained at the Upsilon scale when
assuming the running of the b quark mass as predicted by perturbative QCD.


title: The experimental future of Neutrino Oscillations

abstract:
  After the recent experimental results on neutrino oscillations, some shape
starts to emerge from the puzzle. However, the situation is still far from
being clarified. First of all, accommodating all experimental results in a
single and simple framework is not possible, and the possibility of sterile
neutrinos entering the oscillation process has not been ruled out. Moreover,
new questions arise that the presently-available data, nor those that will be
available in a near future, will be able to answer. In this paper some of these
problems will be discussed, as well as the experimental guidelines for their
clarification.


title: Electroweak Physics at NuTeV

abstract:
  The NuTeV experiment at Fermilab presents a determination of the electroweak
mixing angle. High purity, large statistics samples of muon-neutrino and
muon-antineutrino events allow the use of the Paschos-Wolfenstein relation, a
technique which considerably reduces systematic errors associated with charm
production and other sources. Within the Standard Model, this measurement of
sin2thw indirectly determines the W boson mass to a precision comparable to
direct measurements from high energy e+e- and ppbar colliders. NuTeV measures
sin2thw(on-shell)=0.2253+/-0.0019(stat)+/-0.0010(syst), which implies
M_W=80.26+/-0.11 GeV. Outside the Standard Model, this result can be used to
explore the possibility of new physics; in particular, we present limits on
both neutrino oscillations and the presence of extra neutral vector gauge
bosons.


title: A Measurement of CP Violation in B0 Meson Decays with Belle

abstract:
  We present a preliminary measurement of the Standard Model CP violation
parameter $\sin 2\phi_1$ using the Belle detector. A $6.2~{\rm fb}^{-1}$ sample
of events produced by the KEKB asymmetric $e^+e^-$ collider operating at the
$\Upsilon(4S)$ resonance is used. We report a preliminary result of $$\sin
2\phi_1=0.45^{+0.43}_{-0.44}({\rm stat})^{+0.07}_{-0.09}({\rm syst}).$$


title: Jet Substructure at HERA

abstract:
  Measurements of jet shapes and subjet multiplicities in photoproduction
performed by ZEUS are presented and compared to leading-logarithm parton-shower
Monte Carlo models. The predicted differences on the size of gluon- and
quark-initiated jets are used to select samples to study the dynamics of the
subprocesses.


title:
A high-Q^2 measurement of the photon structure function F_2^gamma at
  LEP2

abstract:
  The photon structure function F_2^gamma has been measured at <Q^2> of 706
GeV^2, using a sample of two-photon events with a scattered electron observed
in the OPAL electromagnetic endcap calorimeter. The data were taken during the
years 1997-1999, when LEP operated at e+e- centre-of-mass energies ranging from
183 to 202 GeV, and correspond to an integrated luminosity of 424 pb^-1. This
analysis represents the highest <Q^2> measurement of F_2^gamma made to date.


title: Recent Results from SELEX

abstract:
  The SELEX experiment (E781) is 3-stage magnetic spectrometer for the study of
charm hadroproduction at large xF using 600 Gev Sigma-, pi- and p beams. New
precise measurements of the Lambda_c, D0, and Ds lifetimes are presented. We
also report results on Lambda_c and Ds production by Sigma-, pi- and p beams at
xF>0.2. The data agree with expectations from color-drag models to explain
charm particle/antiparticle production asymmetries.


title: Photon Structure

abstract:
  The LEP experiments measure the QED and QCD structure of the photon in
deep-inelastic electron-photon scattering. The status of these measurements is
discussed in this short review.


title:
Measurement of the B0 Lifetime and Oscillation Frequency using
  B0->D*+l-v decays

abstract:
  The lifetime and oscillation frequency of the B0 meson has been measured
using B0->D*+l-v decays recorded on the Z0 peak with the OPAL detector at LEP.
The D*+ -> D0pi+ decays were reconstructed using an inclusive technique and the
production flavour of the B0 mesons was determined using a combination of tags
from the rest of the event. The results t_B0 = 1.541 +- 0.028 +- 0.023 ps, Dm_d
= 0.497 +- 0.024 +- 0.025 ps-1 were obtained, where in each case the first
error is statistical and the second systematic.


title: Precision measurements of the Lambda_c+ and D0 lifetimes

abstract:
  We report new precision measurements of the lifetimes of the Lambda_c+ and D0
from SELEX, the charm hadro-production experiment at Fermilab. Based upon 1630
Lambda_c+ and 10210 D0 decays we observe lifetimes of tau[Lambda_c+] = 198.1 +-
7.0 +- 5.6 fs and tau[D0] = 407.9 +- 6.0 +- 4.3 fs


title:
An improved direct measurement of leptonic coupling asymmetries with
  polarized Z bosons

abstract:
  We present final measurements of the Z boson-lepton coupling asymmetry
parameters Ae, Amu, and Atau with the complete sample of polarized Z bosons
collected by the SLD detector at the SLAC Linear Collider. From the left-right
production and decay polar angle asymmetries in leptonic Z decays we measure Ae
= 0.1544 +- 0.0060, Amu = 0.142 +- 0.015, and Atau = 0.136 +- 0.015. Combined
with our left-right asymmetry measured from hadronic decays, we find Ae =
0.1516 +- 0.0021. Assuming lepton universality, we obtain a combined effective
weak mixing angle of sin**2 theta^{eff}_W = 0.23098 +- 0.00026.


title:
Dijet Production in Charged and Neutral Current e^+p Interactions at
  High Q^2

abstract:
  Jet production in charged and neutral current events in the kinematic range
of Q^2 from 640 to 35000 GeV^2 is studied in deep-inelastic positron-proton
scattering at HERA. The measured rate of multi-jet events and distributions of
jet polar angle, transverse energy, dijet mass, and other dijet variables are
presented. Using parton densities derived from inclusive DIS cross sections,
perturbative QCD calculations in NLO are found to give a consistent description
of both the neutral and charged current dijet production. A direct, model
independent comparison of the jet distributions in charged and neutral current
events confirms that the QCD dynamics of the hadronic final state is
independent of the underlying electroweak scattering process.


title: The Structure of the Virtual Photon

abstract:
  Measurements of dijet cross sections for virtual photons are presented as a
function of $\xo$, the fraction of the virtual photon energy invested in the
production of the dijet system, using the ZEUS detector. Comparisons to QCD
predictions show that a resolved photon component is needed to describe the
data up to values of the photon virtuality comparable to the scale of the
interaction.


title:
Observation of the phi to eta' gamma decay with four charged particles
  and photons in the final state

abstract:
  Using 11.6 1/pb of data collected in the energy range 0.864-1.06 GeV by CMD-2
at VEPP-2M, the rare decay mode phi to eta' gamma was observed via the decay
chain eta' to pi+pi- eta, eta to pi+pi-pi0 or eta to pi+pi- gamma. The
following branching ratio was obtained: Br(phi to eta' gamma) =
(4.9^{+2.2}_{-1.8} +- 0.6) \cdot 10^{-5}.


title:
Measurement of dijet cross sections for events with a leading neutron in
  photoproduction at HERA

abstract:
  Differential cross sections for dijet photoproduction in association with a
leading neutron using the reaction e^+ + p --> e^+ + n + jet + jet + X_r have
been measured with the ZEUS detector at HERA using an integrated luminosity of
6.4 pb^{-1}. The fraction of dijet events with a leading neutron in the final
state was studied as a function of the jet kinematic variables. The cross
sections were measured for jet transverse energies E^{jet}_T > 6 GeV, neutron
energy E_n > 400 GeV, and neutron production angle theta_n < 0.8 mrad. The data
are broadly consistent with factorization of the lepton and hadron vertices and
with a simple one-pion-exchange model.


title: First Measurement of the Photon Structure Function F_2,c^gamma

abstract:
  The first measurement of F_2,c^gamma is presented. At low x the measurement
indicates a non-zero hadron-like component to F_2,c^gamma.
  At large x the measurement constitutes a test of perturbative QCD at
next-to-leading order, with only m_c and alpha_s as free parameters, with a
precision of O(40%).


title:
The Electronics and Data Acquisition Systems of a CsI(Tl) Scintillating
  Crystal Detector for Low Energy Neutrino Experiment

abstract:
  A 500 kg CsI(Tl) scintillating crystal detector is under construction for the
studies of low-energy neutrino physics. The requirements, design, realization
and the performance of the associated electronics, trigger, data acquisition
and software control systems are described. Possibilities for future extensions
are discussed.


title:
Measurements of BR (b -> tau- nubar_tau X) and BR (b -> tau- nubar_tau
  D*+- X) and Upper Limits on BR (B- -> tau- nubar_tau) and BR (b -> s nu
  nubar)

abstract:
  Inclusive branching ratios involving b to tau transitions are measured in
approximately four million hadronic Z decays collected by the ALEPH detector at
LEP. The fully-inclusive branching ratio b -> tau nu X and the semi-inclusive
branching ratio b -> tau nu D*+/- X are measured to be (2.43 +/- 0.20 +/-
0.25)% and (0.88 +/- 0.31 +/- 0.28)%, in agreement with the standard model
predictions. Upper limits on the branching fractions b -> tau nu and b -> s nu
nubar are set to 8.3 10**-4 and 6.4 10**-4 at the 90% C.L. These results allow
a 90% C.L. lower limit of 0.40 (GeV/c**2)**-1 to be set on the tan(beta)/mH+/-
ratio, in the framework of type-II two-Higgs-doublet mode


title: Experimental results on hadronic c decays

abstract:
  Recent results involving hadronic decays of charmed mesons and baryons are
reviewed. Information relevant to decay mechanisms and to light quark scalar
mesons is discussed.


title: Inclusive pi0 and K0s in gamma-gamma at L3

abstract:
  The ee -> ee+pi0+X and ee -> ee+K0s+X reactions are studied at LEP using data
collected with the L3 detector at sqrt{s}=189-202 GeV. Preliminary results for
the differential cross section dsigma/dpt in the transverse momentum range 0.2
GeV < pt < 7.5 GeV at central values of pseudo-rapidity, |eta| < 0.5 or |eta| <
1.5, and the differential cross section dsigma/d|eta| for different values of
pt are presented. For pt le 1 GeV, the pt -dependence of the data are well
described by an exponential fit. For pt > 1 GeV the cross sections are compared
to NLO QCD calculations and to LO Monte Carlo predictions.


title: Study of $\tau$ Decays to Six Pions and Neutrino

abstract:
  The $\tau$ decays to six-pion final states have been studied with the CLEO
detector at the Cornell Electron Storage Ring. The measured branching fractions
are ${\cal B}(\tau^-\to 2\pi^-\pi^+3\pi^0\nu_{\tau})=(2.2 \pm 0.3 \pm
0.4)\times 10^{-4}$ and ${\cal B}(\tau^-\to 3\pi^-2\pi^+\pi^0\nu_{\tau})=(1.7
\pm 0.2 \pm 0.2)\times 10^{-4}$. A search for substructure in these decays
shows that they are saturated by intermediate states with $\eta$ or $\omega$
mesons. We present the first observation of the decay $\tau^-\to
2\pi^-\pi^+\omega\nu_{\tau}$ and the branching fraction is measured to be $(1.2
\pm 0.2 \pm 0.1) \times 10^{-4}$. The measured branching fractions are in good
agreement with the isospin expectations but somewhat below the
Conserved-Vector-Current predictions.


title:
Differential cross section for W boson production as a function of
  transverse momentum in proton-antiproton collisions at 1.8 TeV

abstract:
  We report a measurement of the differential cross section for W boson
production as a function of its transverse momentum in proton-antiproton
collisions at sqrt{s} = 1.8 TeV. The data were collected by the D0 experiment
at the Fermilab Tevatron Collider during 1994-1995 and correspond to an
integrated luminosity of 85 pb^{-1}. The results are in good agreement with
quantum chromodynamics over the entire range of transverse momentum.


title: Fermilab E791

abstract:
  Fermilab E791, a very high statistics charm particle experiment, recently
completed its data taking at Fermilab's Tagged Photon Laboratory. Over 20
billion events were recorded through a loose transverse energy trigger and
written to 8mm tape in the the 1991-92 fixed target run at Fermilab. This
unprecedented data sample containing charm is being analysed on many-thousand
MIP RISC computing farms set up at sites in the collaboration. A glimpse of the
data taking and analysis effort is presented. We also show some preliminary
results for common charm decay modes. Our present analysis indicates a very
rich yield of over 200K reconstructed charm decays.


title: Double Tag Events in Two-Photon Collisions at LEP

abstract:
  Double tag events in two photon collisions are studied using the L3 detector
at the LEP center of mass energies $\sqrt{s} \simeq 189-202$ GeV. The
cross-section of $\gamma ^* \gamma ^*$ collisions is measured at an average
photon virtuality $<Q^2 > = 15 \rm{GeV}^2$. The results are in agreement with
Monte Carlo predictions based on perturbative QCD, while the Quark Parton Model
alone is insufficient to describe the data. The measurements are compared to
the LO and the NLO BFKL calculations


title:
Production rate of bb(bar) quark pairs from gluons and bb(bar)bb(bar)
  events in hadronic Z Decays

abstract:
  The rates are measured per hadronic Z decay for gluon splitting to bb(bar)
quark pairs, g_bb, and of events containing two bb(bar) quark pairs, g_4b,
using a sample of four-jet events selected from data collected with the OPAL
detector. Events with an enhanced signal of gluon splitting to bb(bar) quarks
are selected if two of the jets are close in phase-space and contain detached
secondary vertices. For the event sample containing two bb(bar) quark pairs,
three of the four jets are required to have a significantly detached secondary
vertex. Information from the event topology is combined in a likelihood fit to
extract the values of g_bb and g_4b, namely g_bb = (3.07 +- 0.53(stat) +-
0.97(syst))x10^-3 g_4b = (0.36 +- 0.17(stat) +- 0.27(syst))x10^-3


title:
K0sK0s Final State and Glueball Searches and Lambda-Lambdabar Production
  in Two-Photon Collisions in L3 at LEP

abstract:
  The K0sK0s final state in two-photon collisions is studied with the L3
detector at LEP using data collected at centre-of-mass energies from 91 GeV to
202 GeV. The mass spectrum is dominated by the formation of the f_2'(1525)
tensor meson in the helicity two state. The two-photon width times the
branching ratio is measured to be Gamma_{gamma
gamma}(f_2'(1525))Br(f_2'(1525)->KKbar) = 0.076 +- 0.006 +- 0.011 keV. Clear
evidence for destructive f_2(1270)-a_2(1320) interference is observed. In
addition a clear signal for f_J(1750) is observed. The study of the decay
angular distribution in the 1750 MeV mass region shows that the spin two
helicity two wave is dominant. No signal is observed in the region around 2.2
GeV. The upper limit for the two-photon partial width of the \xi(2230) tensor
glueball candidate of Gamma_{gamma gamma}(\xi(2230))Br(\xi(2230)->K0sK0s)<1.4
eV at 95% C.L. is derived. The production of Lambda-Lambdabar pairs in
two-photon collisions is also studied. The cross section is compared to
quark-diquark model predictions.


title:
Investigation of the Decay of Orbitally-Excited B Mesons and First
  Measurement of the Branching Ratio BR(B*_J->B*pi(X))

abstract:
  From about 4 million hadronic Z decays recorded by the OPAL detector on and
near to the Z resonance, we select a sample of more than 570000 inclusively
reconstructed B mesons. Orbitally-excited mesons B*J are reconstructed using
Bpi+- combinations. Independently, B* mesons are reconstructed using the decay
B* -> Bgamma. The selected B* candidates are used to obtain samples enriched or
depleted in the decay B*J -> B*pi+-(X), where (X) refers to decay modes with or
without additional accompanying decay particles. From the number of signal
candidates in the Bpi+- mass spectra of these two samples, we perform the first
measurement of the branching ratio of orbitally-excited B mesons decaying into
B*pi(X):
  BR(B*J ->B*pi(X)) = 0.85 +0.36-0.37 +- 0.12, where the first error is
statistical and the second systematic. If B*J decay modes other than single
pion transitions can be neglected the measured ratio corresponds to the
branching ratio BR(B*J->B*pi). In the framework of Heavy Quark Symmetry, a
simultaneous fit to the Bpi+- mass spectra of the samples enriched or depleted
in B*J->B*pi+-(X) decays yields the mass and the width of the B1(3/2) state, as
well as the branching ratio of B*J mesons decaying into B*pi: M(B1(3/2)) =
(5.738 +0.005-0.006 +-0.007) GeV/c2 G(B1(3/2)) = (18 +15-13 +29-23) MeV/c
BR(B*J->B*pi) = 0.74 +0.12-0.10 +0.21-0.15, where the uncertainties are
statistical and systematic, respectively.


title: QCD at the Tevatron: Jets and Fragmentation

abstract:
  At the Fermilab Tevatron energies, ($\sqrt{s}$=1800 GeV and $\sqrt{s}$=630
GeV), jet production is the dominant process. During the period 1992-1996, the
D0 and CDF experiments accumulated almost 100 pb**-1 of data and performed the
most accurate jet production measurements up to this date. These measurements
and the NLO-QCD theoretical predictions calculated during the last decade, have
improved our understanding of QCD, our knowledge of the proton structure, and
pushed the limit to the scale associated with quark compositeness to 2.4-2.7
TeV. In this paper, we present the most recent published and preliminary
measurements on jet production and fragmentation by the D0 and CDF
collaborations.