title: Vector meson production at HERA

abstract:
  New results on elastic electroproduction and proton-dissociative
photoproduction at large t of rho, phi and J/psi mesons are presented. They are
interpreted within perturbative QCD.


title: Neutral Charm Decays at CLEO: Searches for CP Violation and Mixing

abstract:
  Recent CLEO results on neutral charm meson decays presented at the XXXVIth
Rencontres de Moriond are discussed. We find no evidence of CP asymmetry in
five different two-body decay modes of the D0 to pairs of light pseudo-scalar
mesons. We present a measurement of the mixing parameter y_CP = -0.011 +- 0.025
+- 0.014 by searching for a lifetime difference between the CP neutral K+ pi-
final state and the CP even K+ K- and pi+ pi- final states. Finally, we
describe the first measurement of the rate of wrong-sign D0 to K+ pi- pi0
decay: R_WS = (0.43 +0.11 -0.10 +- 0.07)%.


title: Observation of B->J/psi K1(1270)

abstract:
  We report the first observation of the exclusive decay process B->J/psi
K1(1270) using a sample of 11.2M BBbar meson pairs collected in the Belle
detector at the KEKB asymmetric e+e- collider. We measure branching fractions
of Bf(B0 -> J/psi K10(1270) = (1.30 +-0.34 +-0.31)x10^-3 and Bf(B+ -> J/psi
K1+(1270) = (1.80 +-0.34 +-0.39)x10-3, where the first error is statistical and
the second systematic. These modes constitute approximately 15% of the total
number of B -> J/psiX decays. No evidence is seen for B -> J/psi K1(1400) and
we set an upper limit on this branching fraction. The K1(1270) -> K0pi+pi-
decays have a substantial K0rho0 intermediate state component that may be
useful for CP violation studies.


title:
A new approach to neutrino and WIMP detection using telecom-grade
  electrooptic and fiber-optic components

abstract:
  The dense energy deposition from a low-energy nuclear recoil produces, via
the thermoacoustic effect, a brief yet intense pressure pulse that can be used
for WIMP or neutrino detection in some fiber-optic devices sensitive to
acoustooptic disturbances. Several possible detection schemes are described:
all of them are inspired by modern fiber-optic sensor technologies and share
common characteristics of low-cost and expected insensitivity to
minimum-ionizing backgrounds.

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


title: First Measurement of Form Factors of the Decay Xi0->Sigma+ e- anti-nu/e

abstract:
  We present the first measurement of the form factor ratios g1/f1 (direct
axial-vector to vector), g2/f1 (second class current) and f2/f1 (weak
magnetism) for the decay Xi0 -> Sigma+ e- anti-nu/e using the KTeV (E799) beam
line and detector at Fermilab. From the Sigma+ polarization measured with the
decay Sigma+ -> p pi0 and the e- - anti-nu/e correlation, we measure g1/f1 to
be 1.32 +0.21-0.17(stat.) +/- 0.05(syst.), assuming the SU(3)f (flavor) values
for g2/f1 and f2/f1. Our results are all consistent with exact SU(3)f symmetry.


title: Finding H0 -> bbbar at the LHC

abstract:
  We have investigated the sensitivity of CMS for finding the Higgs boson in
the H0 -> bbbar channel. An excellent b-tagging performance and a good jet
resolution are the main requirements needed for a successful event selection.
In the Standard Model (SM), the ttbar H0 -> l+- nu qqbar bbbar bbbar channel is
accessible, if the Higgs mass is lighter than m(H0) = 125 GeV, already during
the first years of the LHC. Also, most of the MSSM (Minimal Supersymmetric
Standard Model) parameter space can be covered. The W+- H0 -> l+- nu bbbar
channel is only accessible with high luminosity at the LHC. In both channels
the mass can be determined with a precision of a few per cent and the Higgs
couplings at the level of 10%.


title: Measurements of Charmless Hadronic B Decays Branching Fraction at BABAR

abstract:
  We present preliminary measurements of the branching fractions for charmless
hadronic decays of B mesons into two-body final states with kaons, pions and a
phi resonance. The measurements are based on a data sample of approximately 23
million B-anti-B pairs collected by the BABAR detector at the PEP-II asymmetric
B Factory at SLAC.


title: Charmless Hadronic B Decays at BABAR

abstract:
  We present several searches for charmless hadronic two-body and three-body
decays of B mesons from electron-positron annihilation data collected by the
BABAR detector near the Upsilon(4S) resonance. We report the preliminary
branching fractions BR(B0 --> pi+pi-) = (4.1 +/- 1.0 +/- 0.7) x 10^-6, BR(B0
--> K+pi-) = (16.7 +/- 1.6 +/- 1.3) x 10^-6, BR(B0 --> rho-/+ pi+/-) = (49 +/-
13 +6 -5) x 10^-6, BR(B+ --> eta' K+) = (62 +/- 18 +/- 8) x 10^-6, and present
upper limits for nine other decays.


title:
The Growth of Interaction Cross-Section of 4.3 GeV Electrons in Excited
  Crystals

abstract:
  The microscopic properties of the interactions of relativistic electrons were
observed to alter when macro-conditions, such as the crystal vacuum, were
changed. A qualitative explanation of the phenomenon is given.


title:
Determination Of The Polarization Vector Of Positrons From The Decay Of
  Polarized Muons

abstract:
  In the standard model of electroweak interactions the positrons from the
decay of polarized positive muons are mainly longitudinally polarized. The
measurement of the two transverse polarization components PT1 and PT2 is a
sensitive tool to look for contributions from additional, exotic interactions.
The energy dependence of PT1 yields the low energy Michel parameter eta and
thus an improved model-independent value of the Fermi coupling constant. A
non-zero value PT2 would be the first observation of time reversal violation in
a purely leptonic decay. The muon decay experiment at the Paul Scherrer
Institut is the first experiment to measure all three positron polarization
components, PT1, PT2, and the longitudinal polarization component PL. In this
contribution results from a small data-sample taken in 1999 are presented. The
values obtained are PT1 = (5 +- 16)*10^(-3), PT2 = (1 +- 16)*10^(-3), and PL =
1.09 +- 0.15. More than ten times more data was taken in October/November 2000,
the analysis of which will further reduce the statistical errors.


title: A Study of B meson Decays to Charm at Belle

abstract:
  With ~10fb$^{-1}$ data from Belle, the results of b to c and u decays have
been represented here. Several decay modes have been studied, which include
charmonium, semileptonic decay and Cabibbo-suppressed decays mode. The
preliminary results and the measurements of KM matrix elements will also be
presented here.


title: Super-Kamiokande atmospheric neutrino results

abstract:
  We present atmospheric neutrino results from a 79 kiloton year (1289 days)
exposure of the Super-Kamiokande detector. Our data are well explained by
$\nu_{\mu} \to \nu_{\tau}$ 2-flavor oscillations. We have been attempting to
discriminate between the possible oscillating partners of the muon neutrino as
being either the tau neutrino or the sterile neutrino. Pure $\nu_\mu\to\nu_s$
oscillation is disfavored at 99% C.L.. Moreover, we performed the appearance
search for charged current tau neutrino interactions in the upward-going
samples. Our data is consistent with $\nu_{\tau}$ appearance at roughly the
two-sigma level.


title: B CP-Violation, Mixing and Lifetime Results from Belle

abstract:
  Recent results on the $B$ CP-violation parameter $\sin2\phi_1$, the
$B^0_d$-$\overline{B}^0_d$ mixing parameter $\Delta m_d$ and $B$-meson
lifetimes are reported. The results are based on 10.5 $fb^{-1}$ of data
collected with the Belle detector at KEKB. Using both semileptonic and hadronic
decay modes the neutral and charged $B$-meson lifetimes are measured to be
$\taubz=1.548\pm0.035 (\mathrm{stat.})$~ps and $\taubm=1.656\pm0.038
(\mathrm{stat.})$~ps. The oscillation frequency $\Delta m_d$ for
$B^0_d$-$\overline{B}^0_d$ mixing is measured to be $0.522\pm0.026
(\mathrm{stat.})$~ps$^{-1}$ using semileptonic modes and $0.527\pm0.032
(\mathrm{stat.})$~ps$^{-1}$ using hadronic modes. The above results are
preliminary. The time evolution of $B^0_d$ decays into $J/\psi K^0_S$,
$\psi(2S) K^0_S$, $\chi_{c1} K^0_S$, $\eta_{c} K^0_S$, $J/\psi K^0_L$ and
$J/\psi \pi^0$ modes are studied to obtain $\sin2\phi_1$. Using 282 fully
reconstructed events, $\sin2\phi_1$ is measured to be $$\sin
2\phi_1=0.58^{+0.32}_{-0.34} (\mathrm{stat.})^{+0.09}_{-0.10} (\mathrm{syst.}
).$$


title: B Physics at LEP and SLD

abstract:
  Recent B physics results from LEP and SLD are reviewed. In particular,
results of B lifetimes, semileptonic B decays, charm counting, CKM matrix
elements, and mixing are presented.


title: The D0 Run II Detector and Physics Prospects

abstract:
  The D0 Detector at Fermilab is currently undergoing an extensive upgrade to
participate in the Run II data taking which shall begin on March 1, 2001. The
design of the detector meets the requirements of the high luminosity
environment provided by the accelerator. This paper describes the upgraded
detector subsystems and gives a brief outline of the physics prospects
associated with the upgrade.


title: Sleuth: A Quasi-Model-Independent Search Strategy for New Physics

abstract:
  How can we search for new physics when we only vaguely know what it should
look like? How can we perform an unbiased yet data-driven search? If we see
apparently anomalous events in our data, how can we quantify their
"interestingness" a posteriori? We present an analysis strategy (Sleuth) that
simultaneously addresses each of these questions, and we demonstrate its
application to over thirty exclusive final states in data collected by D0 in
Run I of the Fermilab Tevatron.


title: Rare and Forbidden Decays of D Mesons

abstract:
  We summarize the results of two recent searches for flavor-changing neutral
current, lepton-flavor violating, and lepton-number violating decays of D+, Ds,
and D0 mesons (and their antiparticles) into modes containing muons and
electrons. Using data from Fermilab charm hadroproduction experiment E791, we
examined D+ and Ds pi,l,l and K,l,l decay modes and the D0 dilepton decay modes
containing either l+,l-, a rho0, K*0, or phi vector meson, or a non-resonant
pi,pi, K,pi, or K,K pair of pseudoscalar mesons. No evidence for any of these
decays was found. Therefore, we presented branching-fraction upper limits at
90% confidence level for the 51 decay modes examined. Twenty-six of these modes
had no previously reported limits, and eighteen of the remainder were reported
with significant improvements over previously published results.


title: Electroproduction of the $\Lambda(1520)$ hyperon

abstract:
  The reaction $ep \to e'K^+\Lambda(1520)$ with $\Lambda(1520) \to p'K^-$ was
studied at electron beam energies of 4.05, 4.25, and 4.46 GeV, using the CLAS
detector at the Thomas Jefferson National Accelerator Facility. The
cos$\theta_{K^+}$, $\phi_{K^+}$, $Q^2$, and $W$ dependencies of $\Lambda$(1520)
electroproduction are presented for the kinematic region 0.9 $<$ $Q^2$ $<$ 2.4
GeV$^2$ and 1.95 $<$ $W$ $<$ 2.65 GeV. Also, the $Q^2$ dependence of the
$\Lambda$(1520) decay angular distribution is presented for the first time. The
cos$\theta_{K^+}$ angular distributions suggest {\it t}-channel diagrams
dominate the production process. Fits to the $\Lambda$(1520) {\it t}-channel
helicity frame decay angular distributions indicate the $m_{z}=\pm{1/2}$
parentage accounts for about 60% of the total yield, which suggests this
reaction has a significant contribution from {\it t}-channel processes with
either K$^+$ exchange or longitudinal coupling to an exchanged K$^*$. The $Q^2$
dependence of the $\Lambda$(1520) production cross section is the same as that
observed for $\Lambda$(1116) photo- and electroproduction.


title: First Measurement of the D*+ Width

abstract:
  We have made the first measurement of the D*+ width using 9/fb of e+e- data
collected near the Y4S resonance by the CLEO II.V detector. Our method uses
advanced tracking techniques and a reconstruction method that takes advantage
of the small vertical size of the CESR beam spot to measure the energy release
distribution from the D*+ -> D0 pi+ decay. Our preliminary result is
  Gamma(D*+) = 96 +- 4 (Statistical) +- 22 (Systematic) keV.


title:
A measurement of branching ratios of $D^+$ and $D^+_s$ hadronic decays
  to four-body final states containing a $K_S$

abstract:
  We have studied hadronic four-body decays of $D^+$ and $D^+_s$ mesons with a
$K_S$ in the final state using data recorded during the 1996-1997 fixed-target
run at Fermilab high energy photoproduction experiment FOCUS. We report a new
branching ratio measurement of $\Gamma(D^+\to K_S K^-\pi^+\pi^+)/\Gamma(D^+\to
K_S \pi^+\pi^+\pi^-)=0.0768\pm0.0041\pm0.0032$. We make the first observation
of three new decay modes with branching ratios $\Gamma(D^+\to K_S
K^+\pi^+\pi^-)/\Gamma(D^+\to K_S \pi^+\pi^+\pi^-)=0.0562\pm0.0039\pm0.0040$,
$\Gamma(D^+\to\K_S K^+ K^-\pi^+)/\Gamma(D^+\to K_S
\pi^+\pi^+\pi^-)=0.0077\pm0.0015\pm0.0009$, and $\Gamma(D^+_s\to K_S
K^+\pi^+\pi^-)/\Gamma(D^+_s\to K_S K^-\pi^+\pi^+)=0.586\pm0.052\pm0.043$, where
in each case the first error is statistical and the second error is systematic.


title: Electroweak data and Standard Model Fit Results

abstract:
  Most recent tests of the Standard Model of the electroweak interaction are
reported using data from the four LEP experiments ALEPH, DELPHI, L3 and OPAL,
the SLD experiment at SLC, the Tevatron ppbar experiments CDF and D0, and the
NuTeV neutrino experiment. Consistency of the Standard Model is studied. The
value of the Higgs mass is inferred from a global fit.


title: Higgs Physics at the Large Hadron Collider

abstract:
  A major goal of the future Large Hadron Collider will be the Higgs boson
search. In this paper the discovery In this paper the discovery potential is
described as a function of the Higgs mass showing that a Standard Model Higgs
boson can be discovered after less than two years of running of the collider.
The MSSM Higgs searches and the precision achievable on the measurement of the
Higgs boson parameters are also discussed.


title: Standard Model Higgs Search Strategy at LEP

abstract:
  The Standard Model Higgs boson has been searched for by the four LEP
experiments in the last twelve years. The data collected at LEP in the year
2000 suggest the first observation of a Higgs boson. In this letter, I describe
the basic concepts of the Higgs search at LEP, with emphasis in the statistical
method used to combine the results from the LEP experiments.


title: Recent Results on Strangeness Production from CERN Experiment NA49

abstract:
  New results from NA49 on the production of strangeness in elementary and
nuclear reactions are presented. New measurements of charged kaon and pion
production have been obtained from 40 AGeV Pb+Pb collisions. The evolution of
strange meson yields in nucleus-nucleus interactions is studied as a function
of collision energy and system size. Cascade baryon yields are presented for a
wide range of hadronic interactions including first measurements in p+p and
centrality controlled p+Pb collisions.


title: A New Precise Measurement of the Muon Anomalous Magnetic Moment

abstract:
  The muon (g-2) experiment at BNL has completed four data runs for the
positive muon, beginning in 1997 and has just finished its first run for the
negative muon. Recently the analysis of a 1.3 ppm result based on the 1999 run
was completed and published (a_\mu^+ = 11,659,202(14)(6) x 10^-10). The result
shows a tantalizing discrepancy with the Standard Model prediction of 2.6 times
the combined experimental and theoretical uncertainty. The muon (g-2)
experiment at BNL is ultimately aimed at measuring the anomalous magnetic
moment of the muon with a relative uncertainty of 0.35 ppm.


title:
Production of pi^+-, K^+-, p and p-bar in Quark, Antiquark and Gluon
  Jets

abstract:
  We present measurements of identified charged hadron production over a wide
momentum range using the SLD Cherenkov Ring Imaging Detector. In addition to
studying particle production in flavor-inclusive Z^0 decays, we compare the
production in decays into light, c and b flavor events. We also examine
particle production in gluon jets with that in light quark jets. The jet
flavors are selected by using displaced vertex information.


title: B Hadron Production and b-bbar Correlations in Z0 Decays at SLD

abstract:
  We present results of three SLD analyses: our final determination of the rate
of gluon splitting into b-bbar, an improved measurement of the inclusive b
quark fragmentation function in Z0 decays, and a preliminary first measurement
of the energy correlation between the two leading B hadrons in Z0 decays. Our
results are obtained using hadronic \z0decays produced in e+e- annihilations at
the Stanford Linear Collider (SLC) between 1996 and 1998 and collected in the
SLC Large Detector (SLD). In this period, we used an upgraded vertex detector
with wide acceptance and excellent impact parameter resolution, thus improving
considerably our tagging capability for low-energy B hadrons.


title: Extra Dimensions and More

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 review, we discuss the results of recent
experimental searches for such large extra dimensions, as well as new
developments in this field.


title: NA48: Rare Decay Results

abstract:
  Recent results on the kaon rare decays measured in NA48 experiment at CERN
are presented.


title: Substantial Upgrades to Tevatron Luminosity

abstract:
  Over the next 6 years the CDF and D0 collaborations have the goal of
collecting 15 fb-1 of data in collider Run II. This will require a number of
ambitious upgrades to the Fermilab accelerator complex, some of which have been
completed, some of which are currently being commissioned, and some of which
are under development but have not yet been installed. This paper describes the
major accelerator upgrades required to reach this Run II luminosity goal.


title: Observation of tau neutrino charged-current interactions

abstract:
  The DONUT collaboration has observed four events in a hybrid emulsion
spectrometer consistent with tau neutrino charged-current interactions. The
resulting tau lepton is identified by its decay into a single charged particle.
The expected background of charm decays and secondary interactions is .34 +/-
>.05 events. The probability that all tau neutrino candidates are due to
background proceesses is 1.1 x 10-4.


title: First Results from the PHOBOS Experiment at RHIC

abstract:
  PHOBOS is one of four experiments studying Au-Au collisions at RHIC. During
the first running period RHIC provided Au+Au collisions at $\sqrt{s_{_{NN}}}$ =
56 GeV and 130 GeV. The data collected during this period allowed us to study
the energy and centrality dependence of particle production, the anisotropy of
the final state azimuthal distribution and particle ratios at mid-rapidity.


title: The BABAR Detector

abstract:
  BABAR, the detector for the SLAC PEP-II asymmetric e+e- B Factory operating
at the upsilon 4S resonance, was designed to allow comprehensive studies of
CP-violation in B-meson decays. Charged particle tracks are measured in a
multi-layer silicon vertex tracker surrounded by a cylindrical wire drift
chamber. Electromagentic showers from electrons and photons are detected in an
array of CsI crystals located just inside the solenoidal coil of a
superconducting magnet. Muons and neutral hadrons are identified by arrays of
resistive plate chambers inserted into gaps in the steel flux return of the
magnet. Charged hadrons are identified by dE/dx measurements in the tracking
detectors and in a ring-imaging Cherenkov detector surrounding the drift
chamber. The trigger, data acquisition and data-monitoring systems, VME- and
network-based, are controlled by custom-designed online software. Details of
the layout and performance of the detector components and their associated
electronics and software are presented.


title: Searches for Charged Higgs Bosons at LEP

abstract:
  The four LEP experiments Aleph, Delphi, L3 and Opal updated their searches
for pair production of charged Higgs bosons using more than 210/pb luminosity
collected per experiment in the year 2000. Combining it with previously
collected data, a significant deviation from background (equivalent to 4.4
sigma) is found by the L3 collaboration for low values of the branching ratio
H+/- -> tau nu around masses of about 68 GeV. This excess is however not seen
by the other LEP collaborations and thus a lower limit on the charged Higgs
mass is set at 78.5 GeV at 95% confidence level. All results reported here are
still preliminary.


title: Determination of the b Quark Mass at the Z Mass Scale

abstract:
  In hadronic decays of Z bosons recorded with the OPAL detector at LEP, events
containing b quarks were selected using the long lifetime of b flavoured
hadrons. Comparing the 3-jet rate in b events with that in d,u,s and c quark
events, a significant difference was observed. Using Order(alpha_s squared)
calculations for massive quarks, this difference was used to determine the b
quark mass in the MSbar renormalisation scheme at the scale of the Z boson
mass. By combining the results from seven different jet finders the running b
quark mass was determined to be mb(MZ) = (2.67 +/- 0.03(stat) +0.29/-0.37(syst)
+/- 0.19(theo.)) GeV. Evolving this value to the b quark mass scale itself
yields mb(mb) = (3.95 +0.52/-0.62) GeV, consistent with results obtained at the
b quark production threshold. This determination confirms the QCD expectation
of a scale dependent quark mass. A constant mass is ruled out by 3.9 standard
deviations.


title: A Measurement of the Tau Topological Branching Ratios

abstract:
  Using data collected in the DELPHI detector at LEP-1, measurements of the
inclusive tau branching ratios for decay modes containing one, three, or five
charged particles have been performed, giving the following results:
  B_1 = B(\tau^- -> (particle)^- \geq 0pi^0 \geq 0K^0 \nu_\tau(\bar{\nu})) =
(85.316 +/- 0.093 +/- 0.049)%;
  B_3 = B(\tau^- -> 2h^-h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (14.569 +/- 0.093
+/- 0.048)%;
  B_5 = B(\tau^- -> 3h^-2h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (0.115 +/- 0.013
+/- 0.006)%, where h is either a charged pi or K meson. The first quoted
uncertainties are statistical and the second systematic.


title:
A study of backward going $p$ and $\pi^{-}$ in $\nu_{\mu}CC$
  interactions with the NOMAD detector

abstract:
  Backward proton and $\pi^-$ production has been studied in $\nu_{\mu}CC$
interactions with carbon nuclei. Detailed analyses of the momentum
distributions, of the production rates, and of the general features of events
with a backward going particle, have been carried out in order to understand
the mechanism producing these particles. The backward proton data have been
compared with the predictions of the reinteraction and the short range
correlation models.


title:
Results on cascade production in lead-lead interactions from the NA57
  experiment

abstract:
  The NA57 experiment has been designed to study the production of strange and
multi-strange particles in Pb-Pb and p-Be collisions at the CERN SPS. The
predecessor experiment WA97 has measured an enhanced abundance of strange
particles in Pb-Pb collisions relative to p-A reactions at 160 GeV/c per
nucleon beam momentum. NA57 has extended the WA97 measurements to investigate
the evolution of the strangeness enhancement pattern as a function of the beam
energy and over a wider centrality range. In this paper, we report results on
cascade production for about the 60% most central collisions at 160 GeV/c per
nucleon.


title: Rapidity-Rank Structure of p pbar Pairs in Hadronic Z0 Decays

abstract:
  The rapidity-rank structure of p pbar pairs is used to analyze the mechanism
of baryon production in hadronic Z0 decay. The relative occurrence of the
rapidity-ordered configuration p M pbar, where M is a meson, and that of p pbar
adjacent pairs is compared. The data are found to be consistent with
predictions from a mechanism producing adjacent-rank p pbar pairs, without
requiring `string-ordered' p M pbar configurations. An upper limit of 15% at
90% confidence is determined for the p M pbar contribution.


title:
Measurements of CP violation, mixing and lifetimes in B meson decays
  with the BABAR experiment at PEP-II

abstract:
  The BABAR detector, which operates at the SLAC PEPII asymmetric e+e- collider
at energies near the Y(4S) resonance has collected about 23M B-anti-B pairs in
year 2000. Based on this data sample, we present the first study of sin(2b),
with samples of B^0 --> J/psi K0S, B^0 --> psi(2S) K0S and B^0 --> J/psi K0L
decays. The measured value is 0.34+-0.20+-0.05. In addition, we present
preliminary measurements of charged and neutral B meson lifetimes and
B^0-anti-B^0 oscillation frequency.


title:
Measurement of the anti-B ---> D* pi lepton anti-neutrino(lepton)
  Branching Fraction

abstract:
  A study of b semileptonic decays into D, D pi+- and D* pi+- final states is
presented. The D0, D+ and D*+ mesons are exclusively reconstructed in Z decay
data recorded from 1992 to 1995 in the DELPHI experiment at LEP. The overall
branching fractions are measured to be:
  BR(b -> D^0 \ell^- \bar{\nu}_{\ell} X) = (7.04 +/- 0.34 (stat) +/- 0.36
(syst.exp) +/- 0.17 (BR_D))%
  BR(b -> D^+ \ell^- \bar{\nu}_{\ell} X) = (2.72 +/- 0.19 (stat) +/- 0.16
(syst.exp) +/- 0.18 (BR_D))%
  BR(b -> D^{*+} \ell^- \bar{\nu}_{\ell} X) = (2.75 +/- 0.17 (stat) +/- 0.13
(syst.exp) +/- 0.09 (BR_D))%
  where the D0 and D+ results include also contributions from D*0 and D*+
decays. A fit to the distribution of the pi+- impact parameter to the primary
interaction vertex provides a measurement of the b semileptonic branching
fractions into the D0 pi+- X, D+ pi+- X and D*+ pi+- X final states. Assuming
that single pion decay modes of B mesons dominate, the partial rates for
\bar{B} -> D \pi \ell^- \bar{\nu_{\ell}} and \bar{B} -> D^{*} \pi \ell^-
\bar{\nu_{\ell}} have been obtained, corresponding to a total branching
fraction:
  BR(\bar{B} -> D \pi \ell^- \bar{\nu_{\ell}}) + BR(\bar{B} -> D^{*} \pi \ell^-
\bar{\nu_{\ell}}) = (3.40 +/- 0.52 (stat) +/- 0.32 (syst))% .
  This result agrees well with the observed difference between the total B
semileptonic branching fraction and the sum of the \bar{B} -> D \ell^-
\bar{\nu_{\ell}} and D^* \ell^- \bar{\nu_{\ell}} branching fractions.


title: Searching for Quark Matter at the CERN SPS

abstract:
  This article gives a brief overview of some recent advances in our
understanding of the physics of dense strongly interacting matter, from
measurements done at the CERN SPS. The presently available results are very
interesting, and are likely to reflect the production of a new state of matter
in central Pb-Pb collisions, at the highest SPS energies. However, important
questions require further work. Particular emphasis is given to developments
made since the Quark Matter 1999 conference, and to issues that justify the
continuation of the SPS heavy ion physics program beyond year 2000.


title: Determination of |Vub|/|Vcb| with DELPHI at LEP

abstract:
  The ratio of the CKM quark-mixing matrix elements |Vub|/|Vcb| has been
measured using B hadron semileptonic decays. The analysis uses the
reconstructed mass M_X of the secondary hadronic system produced in association
with an identified lepton. Since B -> X_u lepton anti-nu transitions are
characterised by hadronic masses below those of the D mesons produced in B ->
X_c lepton anti-nu transitions, events with a reconstructed value of M_X
significantly below the D mass are selected. Further signal enrichments are
obtained using the topology of reconstructed decays and hadron identification.
A fit to the numbers of decays in the b -> u enriched and depleted samples with
M_X above and below 1.6 GeV/c^2 and to the shapes of the lepton energy
distribution in the B rest frame gives |Vub|/|Vcb|= 0.103^{+0.011}_{-0.012}
(stat.) +/- 0.016 (syst.) +/- 0.010 (model) and, correspondingly, a charmless
semileptonic B decay branching fraction of BR(B -> X_u lepton anti-nu) = (1.57
+/- 0.35 (stat.) +/- 0.48 (syst.) +/- 0.27 (model)) x 10^{-3}.


title:
Deep Inelastic Scattering at Large Energy and Momentum Transfers: Recent
  Results from HERA

abstract:
  Data from H1 and ZEUS on the structure and the quark and gluon densities of
the proton are discussed. A brief excursion is made into the field of inclusive
diffraction by deep inelastic scattering. The comparison of e- p and e+ p
scattering at large momentum transfers demonstrates clearly the presence of
weak contributions in neutral current interactions. The comparison with the
corresponding charged current results shows at Q2 values above the masses
squared of the heavy vector bosons the unification of electromagnetic and weak
interactions. The new data are testing the validity of the Standard Model down
to spatial resolutions of the order of 10^{-16} cm. Intensive searches have
been performed for a manifestation of instantons, for signs of compositeness of
quarks and leptons and for the effect of extra dimensions.


title: Other searches at LEP

abstract:
  During the year 2000, LEP has been operated at centre-of-mass energies up to
sqrt(s) = 209 GeV. New particle searches have been performed using these data
samples. Model independent limits on the production cross-sections and mass
limits in the context of the Minimal Supersymmetric Standard Model (MSSM)
assuming R-parity violation and in the context of gauge-mediated supersymmetry
breaking theories (GMSB) are presented. Searches for technicolor, excited
leptons and leptoquarks are also reviewed.


title: Search for charged Higgs bosons in L3

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 200 and
209 GeV, corresponding to an integrated luminosity of 217.8 pb^-1. We observe
an excess of events in the H+-H -> cscs and cs\tau\nu channels in the mass
region around 68 GeV, which is most significant at low values of the H+ ->
\tau\nu branching ratio. Including data taken at lower centre-of-mass energies,
the excess is compatible with a 4.4\sigma fluctuation in the background.
Interpreting this excess as a statistical fluctuation in the background, lower
limits on the charged Higgs mass are derived at the 95% confidence level. They
vary from 67.1 to 84.9 GeV as a function of the H+ -> \tau\nu branching ratio.
These results are PRELIMINARY.


title: Electroweak Results from SLD

abstract:
  In this paper we present three updates to heavy flavour results from the SLD
detector at SLAC. These results are preliminary, based on our full 1993-1998
dataset of 550 000 hadronic Z0 decays produced with an average electron
polarisation of 73%. The new measurements are of the hadronic branching
fractions into heavy quarks (Rb, Rc), the b quark asymmetry (Ab) using jet
charge, and the heavy quark asymmetries (Ab and Ac) using vertex charge and
kaons.


title: Tests of Power Corrections for Event Shapes in e+e- Annihilation

abstract:
  A study of perturbative QCD calculations combined with power corrections to
model hadronisation effects is presented. The QCD predictions are fitted to
differential distributions and mean values of event shape observables measured
in e+e- annihilation at centre-of-mass energies from 14 to 189 GeV. We
investigate the event shape observables thrust, heavy jet mass, C-parameter,
total and wide jet broadening and differential 2-jet rate and observe a good
description of the data by the QCD predictions. The strong coupling constant
alpha_S(M_Z) and the free parameter of the power correction calculations
alpha_0(2 GeV) are measured to be alpha_S(M_Z) = 0.1171 +/- 0.0032/0.0020 and
alpha_0(2 GeV) = 0.513 +/- 0.066/0.045. The predicted universality of alpha_0
is confirmed within the uncertainties of the measurements.


title: Luminosity Measurement at PEP-N

abstract:
  The PEP-N experiment requires a fast on-line luminosity monitor of modest
accuracy plus an off-line method of determining integrated luminosity with
accuracy of 0.01 for each pb$^{-1}$. We propose the PEP-2 monitor, based on
observing single bremsstrahlung at zero degrees to the positron direction at
collision for the former and the use of Bhabha scatters at polar angles $>$.03
radians for the latter requirement.


title:
Measurement of Branching Fractions and Search for CP-Violating Charge
  Asymmetries in Charmless Two-Body B Decays into Pions and Kaons

abstract:
  We present measurements of the branching fractions and a search for
CP-violating charge asymmetries in charmless hadronic decays of B mesons into
two-body final states of kaons and pions. The results are based on a data
sample of approximately 23 million BB(bar) pairs collected by the BABAR
detector at the PEP-II asymmetric B Factory at SLAC. We find the following
branching fractions: BF(B0-->pi+pi-)= (4.1+/-1.0+/-0.7) x 10^{-6},
BF(B0-->K+pi-)=(16.7+/-1.6+/-1.3) x 10^{-6},
BF(B+-->K+pi0)=(10.8^{+2.1}_{-1.9}+/-1.0) x 10^{-6},
BF(B+-->K0pi+)=(18.2^{+3.3}_{-3.0}+/-2.0) x 10^{-6},
BF(B0-->K0pi0)=(8.2^{+3.1}_{-2.7}+/-1.2) x 10^{-6}. We also report the 90%
confidence level upper limits BF(B0-->K+K-) < 2.5 x 10^{-6}, BF(B+-->pi+pi0) <
9.6 x 10^{-6}, and BF(B+-->anti-K0K+) < 2.4 x 10^{-6}. In addition, charge
asymmetries have been measured and found to be consistent with zero, where the
statistical precision is in the range of +/-0.10 to +/-0.18, depending on the
decay mode.


title: Search for non-SM Higgses at LEP

abstract:
  The four LEP experiments, ALEPH, DELPHI, L3 and OPAL, have searched for Higgs
bosons predicted by a large number of extensions of the Standard Model. Flavor
independent searches are presented for the h$^{0}$Z$^{0}$ process in which the
h$^{0}$ decays hadronically. Search results are also presented for fermiophobic
Higgs bosons, invisibly decaying Higgs bosons, charged Higgs bosons and the
neutral Higgs bosons in the MSSM.


title: Quartic Gauge Boson Couplings Results at LEP

abstract:
  The study of charged and neutral boson vertices has been performed in
different production channels at the LEP experiments. Decay rates and kinematic
properties of these events are exploited to set constraints on the
corresponding gauge couplings.


title: Heavy Flavour Production at HERA

abstract:
  Recent measurements of Charm and Beauty production at HERA are described. The
charm results are well described by NLO QCD calculations with a somewhat better
description in the CCFM than in the DGLAP evolution schemes. However, the
Beauty results in both photoproduction and in deep inelastic scattering (DIS)
are poorly described by such calculations.


title:
Investigation of vacuum polarization in t-channel radiative Bhabha
  scattering

abstract:
  We discuss the possibility of a precision measurement of vacuum polarization
in t-channel radiative Bhabha scattering at a high luminosity collider. For
illustration, the achievable precision is estimated for the BaBar experiment at
PEP-II and for the OPAL experiment at LEP.


title:
Search for Narrow Diphoton Resonances and for gamma-gamma+W/Z Signatures
  in p\bar p Collisions at sqrt(s)=1.8 TeV

abstract:
  We present results of searches for diphoton resonances produced both
inclusively and also in association with a vector boson (W or Z) using 100
pb^{-1} of p\bar p collisions using the CDF detector. We set upper limits on
the product of cross section times branching ratio for both p\bar
p\to\gamma\gamma + X and p\bar p\to\gamma\gamma + W/Z. Comparing the inclusive
production to the expectations from heavy sgoldstinos we derive limits on the
supersymmetry-breaking scale sqrt{F} in the TeV range, depending on the
sgoldstino mass and the choice of other parameters. Also, using a NLO
prediction for the associated production of a Higgs boson with a W or Z boson,
we set an upper limit on the branching ratio for H\to\gamma\gamma. Finally, we
set a lower limit on the mass of a `bosophilic' Higgs boson (e.g. one which
couples only to \gamma, W, and Z$ bosons with standard model couplings) of 82
GeV/c^2 at 95% confidence level.


title:
Extraction of R=sigma_L/sigma_T from CCFR Neutrino and Antinetrino
  Differential Cross Sections

abstract:
  We report on the extraction of R=sigam_L/sigma_T from CCFR neutrino and
antineutrino-Iron differential cross sections. R as measured in neutrno
scattering is in agreement with $R$ as measured in muon and electron
scattering. All data on R for Q2 > 1 GeV2 are in agreement with a NNLO QCD
calculation which uses NNLO PDFs and includes target mass effects. We report on
the first measurements of R in the low x and Q2 < 1 GeV2 region (where an
anomalous large rise in R for nuclear targets has been observed by the HERMES
collaboration).


title: Measurements of Charged Current Reactions of $\nu_e$ on $^{12}C$

abstract:
  Charged Current reactions of $\nu_e$ on $^{12}C$ have been studied using a
$\mu^+$ decay-at-rest $\nu_e$ beam at the Los Alamos Neutron Science Center.
The cross section for the exclusive reaction $^{12}C(\nu_e,e^-)^{12}N_{g.s.}$
was measured to be $(8.9\pm0.3\pm0.9)\times10^{-42}$ cm$^2$. The observed
energy dependence of the cross section and angular distribution of the outgoing
electron agree well with theoretical expectations. Measurements are also
presented for inclusive transitions to $^{12}N$ excited states,
$^{12}C(\nu_e,e^-)^{12}N^*$ and compared with theoretical expectations. The
measured cross section, $(4.3\pm0.4\pm0.6)\times10^{-42}$ cm$^2$, is somewhat
lower than previous measurements and than a continuum random phase
approximation calculation. It is in better agreement with a recent shell model
calculation.


title: Latest Jet Results from the Tevatron or, QCD: Approaching True Precision

abstract:
  This article summarizes several analyses I discussed at Moriond and I attempt
to maintain my speaking voice throughout. I extract several broad themes in the
recent development of QCD,and emphasize how the latest results on jet physics
reinforce these themes: that QCD is in a transitional stage from providing
qualitative descriptions to providing true quantitative descriptions of the
results. Certain figures presented in the talk are not reproduced here in the
interest of space, but can be found directly in the transparencies available
online, or in the references to the refereed journals.


title: Experimental status of measurements of alpha_s at LEP

abstract:
  A summary is given of the current status of measurements of the strong
coupling constant $\alpha_s$ performed at LEP. These include measurements from
inclusive observables as well as from event shape variables. Recent results
based on power law corrections are discussed.


title: First Observation of barB0 to D*0 pi+pi+pi-pi- Decays

abstract:
  We report on the observation of B0bar -> D*0 pi+ pi+ pi- pi- decays. The
branching ratio is (0.30 +/- 0.07 +/- 0.06)%. Interest in this particular mode
was sparked by Ligeti, Luke and Wise who propose it as a way to check the
validity of factorization tests in B0bar -> D*+ pi+ pi- pi- pi0 decays.


title: Search for First-Generation Scalar and Vector Leptoquarks

abstract:
  We describe a search for the pair production of first-generation scalar and
vector leptoquarks in the eejj and enujj channels by the D0 Collaboration. The
data are from the 1992--1996 ppbar run at sqrt{s} = 1.8 TeV at the Fermilab
Tevatron collider. We find no evidence for leptoquark production; in addition,
no kinematically interesting events are observed using relaxed selection
criteria. The results from the eejj and enujj channels are combined with those
from a previous D0 analysis of the nunujj channel to obtain 95% confidence
level (C.L.) upper limits on the leptoquark pair-production cross section as a
function of mass and of beta, the branching fraction to a charged lepton. These
limits are compared to next-to-leading-order theory to set 95% C.L. lower
limits on the mass of a first-generation scalar leptoquark of 225, 204, and 79
GeV/c^2 for beta=1, 1/2, and 0, respectively. For vector leptoquarks with gauge
(Yang-Mills) couplings, 95% C.L. lower limits of 345, 337, and 206 GeV/c^2 are
set on the mass for beta=1, 1/2, and 0, respectively. Mass limits for vector
leptoquarks are also set for anomalous vector couplings.


title: CP violation, B mixing and B lifetime results from the BABAR experiment

abstract:
  The BaBar detector at the PEP-II asymmetric B Factory at SLAC collected a
sample of 23M B-anti-B pairs in the years 1999 and 2000. Using this data
sample, we measure the amplitude of the time-dependent CP-violating asymmetry
in neutral B decays to the CP eigenstates B0 --> J/psi K0S, B0 --> psi(2S) K0S
and B0 --> J/psi K0L. We find a value of sin2beta = 0.34 +/- 0.20 (stat) +/-
0.05 (syst). We also present preliminary measurements of the B^0-anti-B^0
oscillation frequency and of the lifetimes of charged and neutral B mesons.


title: New R Values in 2-5 Gev from the Beijing Spectrometer

abstract:
  The values of $R = \sigma(e^+e^-\to {hadrons})/\sigma(e^+e^-\to\mu^+\mu^-)$
for 85 center-of-mass energies between 2 and 5 GeV were measured with the
upgraded Beijing Spectrometer at the Beijing Electron-Positron Collider, with
an average uncertainty of $\sim7%$.


title: Study of the decay $D^0 \to K^- K^- K^+ \pi^+$

abstract:
  Using data from the E791 fixed-target hadroproduction experiment at Fermilab
we have studied the Cabibbo-favored but phase-space suppressed decay, $D^0 \to
K^- K^- K^+ \pi^+$. We find the decay rate for this mode to be $(0.54 \pm 0.16
\pm 0.08) \times 10^{-2}$ times that for the normalization mode $D^0 \to K^-
\pi^- \pi^+ \pi^+$. We observe a clear signal for $D^0 \to \phi K^- \pi^+$
which is consistent with producing $0.7 \pm 0.3$ of the $D^0 \to K^- K^- K^+
\pi^+$ signal. In the context of simple models, we use our measurements to
estimate the importance of decay amplitudes that produce extra quark-antiquark
pairs from the vacuum relative to those that do not.


title: Electroweak Measurements on the Z Resonance

abstract:
  Almost all precision electroweak measurements from the Z resonance made at
the LEP storage ring by the ALEPH, DELPHI, L3 and OPAL experiments and those
made using a polarized electron beam at the SLC by the SLD experiment are now
final and have been published. Changes in the measurements since the last
RADCOR meeting are discussed. The internal consistency of the measurements is
considered. The impact of remaining theoretical uncertainties in the QCD sector
are examined as well as the impact of experimental and theoretical
uncertainties on the value of $\alpha_{\mathrm{QED}}(m_{\mathrm{Z}})$.


title:
Study of B0_s anti-B0_s oscillations and B0_s lifetimes using hadronic
  decays of B0_s mesons

abstract:
  Oscillations of B0s mesons have been studied in samples selected from about
3.5 million hadronic Z decays detected by DELPHI between 1992 and 1995. One
analysis uses events in the exclusive decay channels: B0s -> Ds- pi+ or Ds- a1+
and B0s -> anti-D0 K- pi+ or anti-D0 K- a1+, where the D decays are completely
reconstructed. In addition, B0s anti-B0s oscillations have been studied in
events with an exclusively reconstructed Ds accompanied in the same hemisphere
by a high momentum hadron of opposite charge. Combining the two analyses, a
limit on the mass difference between the physical B0s states has been obtained:
  Delta(m_B0s) > 4.0 ps^{-1} at the 95% C.L. with a sensitivity of Delta(m_B0s)
= 3.2 ps^{-1}. Using the latter sample of events, the B0s lifetime has been
measured and an upper limit on the decay width difference between the two
physical B0s states has been obtained:
  tau(B0s) = 1.53^{+0.16}_{-0.15}(stat.) +/- {0.07}(syst.) ps
  \Delta\Gamma(B0s)/\Gamma(B0s) < 0.69 at the 95% C.L.
  The combination of these results with those obtained using Ds+- lepton-+
sample gives:
  Delta(m_B0s) > 4.9 ps^{-1} at the 95% C.L.
  with a sensitivity of Delta(m_B0s) = 8.7 ps^{-1}.
  tau(B0s) = 1.46 +/- 0.11 ps and \Delta\Gamma(B0s)/\Gamma(B0s) < 0.45 at the
95% C.L.


title: Real and Virtual Photon Structure at HERA

abstract:
  The structure of real and virtual photons has been studied in ep collisions
at HERA using dijet production. Measurements of differential dijet cross
sections as function of the fraction of photon's momentum invested in the dijet
system are presented. The dependence of the cross sections on the virtuality of
the photon and mean transverse energy squared of the two leading jets has been
investigated. QCD calculations based on current parametrizations of the real
and virtual photon parton distribution functions have been compared to the
data.


title: Search for exotic physics with four-fermion coupling at LEP

abstract:
  Preliminary results of measurements of fermion-pair production at LEP2 are
used to derive limits on new physics phenomena. Combinations of the cross
sections and asymmetrie of the 4 LEP collaborations are interpreted in terms
four-fermion contact interactions, exchange of Z' and leptoquarks. Results on
the search for extra dimensions are also presented.


title:
Measurement of the semileptonic b branching fractions and average b
  mixing parameter in Z decays

abstract:
  The semileptonic branching fractions for primary and cascade b decays BR(b ->
lepton-), BR(b -> c -> lepton+) and BR(b -> cbar -> lepton-) were measured in
hadronic Z decays collected by the DELPHI experiment at LEP.
  The sample was enriched in b decays using the lifetime information and
various techniques were used to separate leptons from direct or cascade b
decays.
  By fitting the momentum spectra of di-leptons in opposite jets, the average b
mixing parameter chi-bar was also extracted.
  The following results have been obtained:
  BR(b -> lepton-) = (10.70 +/- 0.08 (stat) +/- 0.21
(syst)_{+0.44}^{-0.30}(model))%
  BR(b -> c -> lepton+) = (7.98 +/- 0.22 (stat) +/- 0.21
(syst)^{+0.14}_{-0.20}(model))%
  BR(b -> cbar -> lepton-) = (1.61 +/- 0.20 (stat) +/- 0.17
(syst)^{+0.30}_{-0.44}(model))% chi-bar = 0.127 +/- 0.013 (stat) +/- 0.005
(syst) +/- 0.004(model)


title: Discussion on the nucleon decay experiments

abstract:
  The results of KGF experiments are compared with the results of Soudan 2 and
Frejus experiments and reasonable agreements are obtained. Nevertheless, the
results of Super-Kamiokande (SK) are somewhat different from the other
experiments and some points in SK are discussed.


title:
Work with Apple's Rhapsody Operating System which Allows Simultaneous
  UNIX Program Development, UNIX Program Execution, and PC Application
  Execution

abstract:
  Over the past decade, UNIX workstations have provided a very powerful program
development environment. However, workstations are more expensive than PCs and
Macintoshes and require a system manager for day-to-day tasks such as disk
backup, adding users, and setting up print queues. Native commercial software
for system maintenance and "PC applications" has been lacking under UNIX.
Apple's new Rhapsody operating system puts the current MacOS on a NeXT UNIX
foundation and adds an enhanced NeXTSTEP object oriented development
environment called Yellow Box. Rhapsody simultaneously runs UNIX and commercial
Macintosh applications such as word processing or spreadsheets. Thus a UNIX
detector Monte Carlo can run for days in the background at the same time as a
commercial word processing program. And commercial programs such as Dantz
Retrospect are being made available to make disk backup easy under Rhapsody.
Apple has announced that in 1999 they intend to be running Rhapsody, or MacOS X
as it will be called in the commercial release, on all their newer computers.
MacOS X may be of interest to those who have trouble hiring expert UNIX system
managers; and to those who would prefer to have a single computer and operating
system on their desktop that serves both the needs of UNIX program development
and running commercial applications, simultaneously. We present our experiences
running UNIX programs and Macintosh applications under the Rhapsody DR2
Developer Release.


title:
Status of the Experiment on the Laboratory Search for the Electron
  Antineutrino Magnetic Moment at the Level mu_nu < 3 s 10^{-12}mu_B

abstract:
  The experiment on the direct detection of antineutrino-electron scattering
with an artificial tritium source allows to lower the present-day laboratory
limit for the neutrino magnetic moment by two orders of magnitude. The
experiment brings together novel unique technologies in studies of rare
processes of neutrino-electron scattering: an artificial source of
antineutrinos from tritium decay of 40 MCi activity with the antineutrino flux
density ~6 10^{14}cm^{-2} s^{-1}; new types of detectors capable of detecting
electrons with energy down to ~10 eV, namely, a silicon cryogenic detector
based on the ionization-into-heat conversion effect, a high purity germanium
detector with the internal amplification of a signal in the electric field. A
compact installation located in a specially equipped laboratory underground
<100 m w.e.) will provide favorable background conditions for running the
experiment. With the background level about 0.1 events/kg keV day and detector
assembly masses 3kg and 5kg for the silicon and germanium ones, respectively,
the limit for the electron antineutrino magnetic moment mu_nu < 3 10^{-12}mu_B
will be obtained during 1-2 years of data acquisition. Status of the experiment
and state-of-the-art are presented.


title:
Study of Dimuon Production in Photon-Photon Collisions and Measurement
  of QED Photon Structure Functions at LEP

abstract:
  Muon pair production in the process e+e- -> e+e-mu+mu- is studied using the
data taken at LEP1 (sqrt(s) \simeq m_Z) with the DELPHI detector during the
years 1992-1995. The corresponding integrated luminosity is 138.5 pb^{-1}. The
QED predictions have been tested over the whole Q^2 range accessible at LEP1
(from several GeV^2/c^4 to several hundred GeV^2/c^4) by comparing experimental
distributions with distributions resulting from Monte Carlo simulations using
various generators. Selected events are used to extract the leptonic photon
structure function F_2^\gamma. Azimuthal correlations are used to obtain
information on additional structure functions, F_A^\gamma and F_B^\gamma, which
originate from interference terms of the scattering amplitudes. The measured
ratios F_A^\gamma/F_2^\gamma and F_B^\gamma/F_2^\gamma are significantly
different from zero and consistent with QED predictions.


title: Recent Results on CP Lifetime Differences of Neutral D Mesons

abstract:
  The mixing parameter y_cp for the neutral D system can be obtained by
comparing the lifetimes of CP eigenstate decays of the D mesons. Recent results
on the lifetime differences from the Belle, CLEO, FOCUS(E831) experiments are
summarized in this article. The neutral D decay modes analyzed by the
experiments are: The D0->Kpi mode with the assumption that it is an equal
mixture of CP even and odd eigenstates, and the CP even modes D0->KK and
D0->pipi.


title: Search for the Decay B+ -> D*+ K0_S

abstract:
  We report on a search for the decay B+ -> D*+ K0_S and its charge conjugate
with the CLEO detector at the Cornell Electron Storage Ring (CESR). No
candidates are found in 9.10/fb of data. The background is estimated to be 0.29
+- 0.05 leading to an upper limit BF(B+ -> D*+ K0_S) = 9.5 x 10^{-5} (90%
C.L.).


title: Estimate of the Energy of Upgoing Muons with Multiple Coulomb Scattering

abstract:
  Upward throughgoing muons in underground detectors are induced by atmospheric
$\nu_\mu$ with energies in the $1-10^4 GeV$ range. The oscillations of
atmospheric muon neutrinos should affect mainly those with energy smaller than
$E_\nu \sim 50 GeV$, or $E_\mu \le 10 GeV$ . We analyzed the MACRO upward
throughgoing muons data set, using the Multiple Coulomb Scattering to estimate
the energy $E_\mu$ of muons crossing the detector. We analyzed the event
distribution for six event subsamples with different values of $<\ell_\nu /
E_\nu>$. The event distribution is in agreement with the hypothesis of neutrino
oscillations with $\Delta m^2$ few times $10^{-3} eV^2$ and maximum mixing.


title: Standard Model Higgs Search in the Four Jet Channel at LEP

abstract:
  The Standard Model Higgs boson was searched for at LEP, by the four
collaborations in the year 2000, at centre-of-mass energies from 200-209GeV. An
excess of events, potentially compatible with the production of a Higgs boson
of mass ~115GeV was observed, largely in the four-jet channel. The search in
this channel is discussed in this letter.


title:
First measurement of the Gerasimov-Drell-Hearn integral for Hydrogen
  from 200 to 800 MeV

abstract:
  A direct measurement of the helicity dependence of the total photoabsorption
cross section on the proton was carried out at MAMI (Mainz) in the energy range
200 < E_gamma < 800 MeV. The experiment used a 4$\pi$ detection system, a
circularly polarized tagged photon beam and a frozen spin target.
  The contributions to the Gerasimov-Drell-Hearn sum rule and to the forward
spin polarizability $\gamma_0$ determined from the data are 226 \pm 5 (stat)\pm
12(sys) \mu b and -187 \pm 8 (stat)\pm 10(sys)10^{-6} fm^4, respectively, for
200 < E_\gamma < 800 MeV.


title:
Measurement of the neutral current cross section and F2 structure
  function for deep inelastic e+p scattering at HERA

abstract:
  The cross section and the proton structure function F2 for neutral current
deep inelastic e+p scattering have been measured with the ZEUS detector at HERA
using an integrated luminosity of 30 pb-1. The data were collected in 1996 and
1997 at a centre-of-mass energy of 300 GeV. They cover the kinematic range 2.7
< Q^2 < 30000 GeV2 and 6.10^-5 < x < 0.65. The variation of F2 with x and Q2 is
well described by next-to-leading-order perturbative QCD as implemented in the
DGLAP evolution equations.


title: Electroweak Results from LEP and SLC and Tests of the Standard Model

abstract:
  An update of the electroweak measurements at LEP and SLC is presented. These
measurements are used to perform precise tests of the Standard Model. A
constraint on the Standard Model Higgs mass is obtained when the direct
measurements of $m_{top}$ and $M_W$ are included in the fit. A combination with
the direct Higgs search is also shown.


title: Real-Time Data Processing in the Muon System of the D0 Detector

abstract:
  This paper presents a real-time application of the 16-bit fixed point Digital
Signal Processors (DSPs), in the Muon System of the D0 detector located at the
Fermilab Tevatron, presently the world's highest-energy hadron collider. As
part of the Upgrade for a run beginning in the year 2000, the system is
required to process data at an input event rate of 10 KHz without incurring
significant deadtime in readout. The ADSP21csp01 processor has high I/O
bandwidth, single cycle instruction execution and fast task switching support
to provide efficient multisignal processing. The processor's internal memory
consists of 4K words of Program Memory and 4K words of Data Memory. In addition
there is an external memory of 32K words for general event buffering and 16K
words of Dual Port Memory for input data queuing. This DSP fulfills the
requirement of the Muon subdetector systems for data readout. All error
handling, buffering, formatting and transferring of the data to the various
trigger levels of the data acquisition system is done in software. The
algorithms developed for the system complete these tasks in about 20
microseconds per event.


title: SND Upgade

abstract:
  The program of upgrade of the Spherical Neutral Detector for future
experiments at a new VEPP-2000 $e^+e^-$ collider is presented. Modernization
includes upgrades of electromagnetic calorimeter, tracking system, detector
electronics, data acquisition system, and offline software. It is also planned
to equip the detector with two new subsystems: particle identification system
based on aerogel Cherenkov counters and external electron tagging system for
$\gamma\gamma$ physics.


title:
Search for Gluinos and Scalar Quarks in $p\bar{p}$ Collisions at
  $\sqrt{s}=1.8$ TeV using the Missing Energy plus Multijets Signature

abstract:
  We have performed a search for gluinos ($\gls$) and squarks ($\sq$) in a data
sample of 84 pb$^{-1}$ of \ppb collisions at $\sqrt{s}$ = 1.8 TeV, recorded by
the Collider Detector at Fermilab, by investigating the final state of large
missing transverse energy and 3 or more jets, a characteristic signature in
R-parity-conserving supersymmetric models. The analysis has been performed
`blind', in that the inspection of the signal region is made only after the
predictions from Standard Model backgrounds have been calculated. Comparing the
data with predictions of constrained supersymmetric models, we exclude gluino
masses below 195 \gev (95% C.L.), independent of the squark mass. For the case
$\msq \approx \mgls$, gluino masses below 300 \gev are excluded.


title: School Cosmic Ray Outreach Detector (SCROD)

abstract:
  We report on our studies of applying novel detector technologies developed
for LHC-era experiments to cosmic ray detection. In particular, we are
investigating usage of scintillating tiles with embedded wavelength-shifting
fibers and avalanche photodiode readout as part of a robust, inexpensive cosmic
air shower detector. In the near future, we are planning to deploy detector
stations based on this technology at area high schools and colleges as part of
an outreach and education effort, known as SCROD.


title: R Measurements at High Q^2

abstract:
  Previous Measurements of R at high Q^2 are reviewed. Recent R measurement
results, including those from the Beijing Spectrometer Experiment, are
described. The present status of R measurements and future measurement
possiblities are summarized.


title:
Cross Section and Heavy Quark Composition of Photon+Muon Events Produced
  in ppbar Collisions

abstract:
  We present a measurement of the cross section and the first measurement of
the heavy flavor content of associated direct photon + muon events produced in
hadronic collisions. These measurements come from a sample of 1.8 TeV ppbar
collisions recorded with the Collider Detector at Fermilab. Quantum
chromodynamics (QCD) predicts that these events are primarily due to Compton
scattering process charm+gluon -> charm+photon, with the final state charm
quark producing a muon. The cross section for events with a photon transverse
momentum between 12 and 40 GeV/c is measured to be 46.8+-6.3+-7.5 pb, which is
two standard deviations below the most recent theoretical prediction. A
significant fraction of the events in the sample contain a final-state bottom
quark. The ratio of charm to bottom production is measured to be 2.4+-1.2, in
good agreement with QCD models.


title: Measurement of the Ds lifetime

abstract:
  We report precise measurement of the Ds meson lifetime. The data were taken
by the SELEX experiment (E781) spectrometer using 600 GeV/c Sigma-, pi- and p
beams. The measurement has been done using 918 reconstructed Ds. The lifetime
of the Ds is measured to be 472.5 +- 17.2 +- 6.6 fs, using K*(892)0K+- and phi
pi+- decay modes. The lifetime ratio of Ds to D0 is 1.145+-0.049.


title:
Measurement of $\Gamma(K_{\mu 3})/\Gamma(K_{e3})$ ratio using stopped
  positive kaons

abstract:
  The ratio of the $K^{+}\to \pi^{0} \mu^{+} \nu$ ($K_{\mu3}^+$) and $K^{+}\to
\pi^{0} e^{+} \nu$ ($K_{e3}^+$) decay widths, $\Gamma(K_{\mu
3})/\Gamma(K_{e3})$, has been measured with stopped positive kaons.
$K_{\mu3}^+$ and $K_{e3}^+$ samples containing 2.4$\times 10^4$ and 4.0$\times
10^4$ events, respectively, were analyzed. The
$\Gamma(K_{\mu3})/\Gamma(K_{e3})$ ratio was obtained to be
0.671$\pm$0.007(stat.)$\pm$0.008(syst.) calculating the detector acceptance by
a Monte Carlo simulation with the assumption of $\mu$-$e$ universality in
$K_{l3}^+$ decay. The coefficient of the $q^2$ dependent term of the $f_0$ form
factor was also determined to be
$\lambda_0$=0.022$\pm$0.005(stat.)$\pm$0.004(syst.).


title: Diffractive structure functions from HERA

abstract:
  Recent results on diffraction at HERA are presented, focusing on the
measurement of the inclusive diffractive cross section and on the study of two
and three jets in diffractive ep scattering.


title: Latest Results from K2K

abstract:
  The KEK-to-Kamioka long-baseline neutrino experiment (K2K) has begun its
investigation of neutrino oscillation, and has established the method of a
long-baseline neutrino experiment. From the first 100 days of data-taking, a
deficit of muon neutrino in the 1-GeV energy region after 250-km flight was
observed at the 90% significance level.


title: CMD-2 Detector Upgrade

abstract:
  The project of upgrading the detector CMD-2 is presented. The upgraded
detector is called CMD-2M and is going to take data with new collider VEPP-2000
at BINP. The general structure of the detector CMD-2 will remain as is but
major parameters of the detector, such as momentum and angular resolution for
charged particle and energy and spatial resolution for photons, will be
substantially improved.


title: QCD Confinement and the Hall D Project at Jefferson Lab

abstract:
  An understanding of the confinement mechanism in QCD requires a detailed
mapping of the spectrum of hybrid mesons. Understanding confinement means
understanding the role of gluons and it is in hybrid mesons that the gluonic
degrees of freedom are manifest. High statistics searches for such states with
pion and p beams have resulted in some tantalizing signals. There is good
reason to expect beams of photons to yield hybrid mesons with J^{PC} quantum
numbers not possible within the conventional picture of mesons as qqbar bound
states. Meager data currently exist on the photoproduction of light quark
mesons. At Jefferson Lab in Newport News, VA plans are underway to upgrade the
energy of the electron accelerator to 12 GeV. Along with this energy upgrade, a
hermetic detector housed in new experimental hall (Hall D) will be used to
collect data on photoproduced mesons with unprecedented statistics. With 12 GeV
electrons, a 9 GeV linearly polarized photon beam will be produced using the
coherent bremsstrahlung technique.


title: alpha_s at low Q^2 from e+e- and tau data

abstract:
  It has been shown in recent analyses by ALEPH [1] and OPAL [2] that precision
QCD tests are possible with hadronic tau decays by comparing spectral moments
of the hadronic decay ratio of the tau with QCD calculations. In principle e+e-
data can be used in a similar manner by evaluating spectral moments of R. The
current e+e- data is compared with the OPAL tau data and a prediction is made
on the achievable accuracy of QCD tests with the projected precision of PEP-N
[3].


title: Searches for New Physics in Events with a Photon and b-quark Jet at CDF

abstract:
  We have searched for evidence of physics beyond the standard model in events
that include an energetic photon and an energetic b-quark jet, produced in 85pb
of ppbar collisions at 1.8 TeV at the Tevatron Collider at Fermilab. This
signature, containing at least one gauge boson and a third-generation quark,
could arise in the production and decay of a pair of new particles, such as
those predicted by Supersymmetry, leading to a production rate exceeding
standard model predictions. We also search these events for anomalous
production of missing transverse energy, additional jets and leptons (e, mu and
tau), and additional b quarks. We find no evidence for any anomalous production
of gamma-b or gamma-b+X events. We present limits on two supersymmetric models:
a model where the photon is produced in the decay chi2->gamma chi1, and a model
where the photon is produced in the neutralino decay into the Gravitino LSP,
chi1 -> gamma G. We also present our limits in a model-independent form and
test methods of applying model-independent limits.


title: QCD Studies in Two-Photon Collisions at CLEO

abstract:
  We review QCD results of CLEO two-photon analyses and discuss the
measurements of two-photon partial widths of charmonium and cross sections for
hadron pairs production, antisearch for glueballs and the measurements of
$\gamma^*\gamma \to$ pseudoscalar meson transition form factors. We emphasize
the importance of other possible analyses, favorable trigger conditions and
selection criteria of the presently running experiment and the advantages of
CLEOc - the future $\tau$-charm factory at Cornell with the existing CLEO III
detector.


title: F2p at low Q^2 and the total gamma-p cross section at HERA

abstract:
  New precise measurements of the neutral current cross section at HERA are
presented in different Q^2 regimes. In the photoproduction limit the total
gamma-p cross section is found to be in agreement with the universal soft
Pomeron prediction. At medium scales 1.5 < Q^2 < 150 GeV^2 both the F_2 and the
F_L structure functions are determined. These data are well described by NLO
pQCD. The gluon density in the proton has been extracted from the scaling
violation of F_2 at low x. The transition between the two regimes occurs at
around Q^2=1 GeV^2.


title: Supersymmetric dark matter in the light of LEP

abstract:
  The negative outcome of searches for supersymmetry performed at LEP have been
used to derive indirect constraints on the parameters of the most plausible
models for cold dark matter based on supersymmetric extensions of the Standard
Model. The main results are summarized.


title: Proposal for the aerogel Cherenkov counters for the PEP-N detector

abstract:
  The work is devoted to the development of the aerogel Cherenkov counters with
the light collection on wavelength shifters and PMTs (ASHIPH). The ASHIPH
system has been developed for the KEDR detector. Tests of the counters have
been carried out on the Dubna accelerator, the pi/K separation obtained is
about 4 sigma.
  The ASHIPH system is suggested for the PEP-N detector.


title: Production at Intermediate Energies and Lund Area Law

abstract:
  The Lund area law was developed into a Monte Carlo program LUARLW. The
important ingredients of this generator was described. It was found that the
LUARLW simulations are in good agreement with the BEPC/BES R scan data between
2--5 GeV.


title: Improved D0 W Boson Mass Determination

abstract:
  We present a measurement of the W boson mass in proton-antiproton collisions
at \sqrt{s} = 1.8 TeV based on a data sample of 82 pb^-1 integrated luminosity
collected by the D0 detector at the Fermilab Tevatron. We utilize e \nu events
in which the electron shower is close to the phi edge of one of the 32 modules
in the D0 central calorimeter. The electromagnetic calorimenter response and
resolution in this region differs from that in the rest of the module and
electrons in this region were not previously utilized. We determine the
calorimeter response and resolution in this region using Z -> ee events. We
extract the W boson mass by fitting to the transverse mass and to the electron
and neutrino transverse momentum distributions. The result is combined with
previous D0 results to obtain an improved measurement of the W boson mass: m_W
= 80.483 +- 0.084 GeV.


title: The JHF-Kamioka neutrino project

abstract:
  The JHF-Kamioka neutrino project is a second generation long base line
neutrino oscillation experiment that probes physics beyond the Standard Model
by high precision measurements of the neutrino masses and mixing. A high
intensity narrow band neutrino beam is produced by secondary pions created by a
high intensity proton synchrotron at JHF (JAERI). The neutrino energy is tuned
to the oscillation maximum at ~1 GeV for a baseline length of 295 km towards
the world largest water Cerenkov detector, Super-Kamiokande. Its excellent
energy resolution and particle identification enable the reconstruction of the
initial neutrino energy, which is compared with the narrow band neutrino
energy, through the quasi-elastic interaction. The physics goal of the first
phase is an order of magnitude better precision in the nu_mu to nu_tau
oscillation measurement (delta(Delta m_23^2)=10^-4 eV^2 and
delta(sin^22theta_23)=0.01), a factor of 20 more sensitive search in the nu_mu
to nu_e appearance (sin^22theta_{mu e} ~ 0.5sin^22theta_{13}>0.003), and a
confirmation of the nu_mu to nu_tau oscillation or discovery of sterile
neutrinos by detecting the neutral current events. In the second phase, an
upgrade of the accelerator from 0.75 MW to 4 MW in beam power and the
construction of 1 Mt Hyper-Kamiokande detector at Kamioka site are envisaged.
Another order of magnitude improvement in the nu_mu to nu_e oscillation
sensitivity, a sensitive search of the CP violation in the lepton sector (CP
phase "delta" down to 10-20 degrees), and an order of magnitude improvement in
the proton decay sensitivity is also expected.


title: Bottom Production in Two-Photon Collisions at LEP

abstract:
  Results on inclusive and exclusive bottom production in gammagamma collisions
are presented. The total cross section of inclusive bottom production is
investigated through its leptonic decays at LEP II energies by the experiments
L3 and OPAL. The average cross section, after correction for acceptances and
efficiencies, is sigma_tot = 13.3 +- 1.5 +- 2.3 pb. The next-to-leading order
calculations are lower than the data by a factor three, which corresponds to a
difference of more than three standard deviations.
  ALEPH studied the exclusive bottom production. Searching for the eta_b one
candidate is found. Limits on Gamma_gammagamma(eta_b)*BR for 4 and 6 charged
particles are extracted. The candidate has a mass of 9.30 +- 0.04 GeV.


title: Structure Functions and the Spin of the Nucleon: From HERMES to COMPASS

abstract:
  The HERMES and SMC experiments have determined the contribution of different
quark flavors to the nucleon spin in a large range of Bjorken-x via
semi-inclusive deep inelastic scattering. The main goal of the COMPASS
experiment is to measure the gluon polarization in the nucleon. In all
experiments a polarized lepton is scattered off a polarized nucleon. Latest
results from HERMES and perspectives for COMPASS running in 2001 and beyond are
presented.


title: Searches beyond the Standard Model at HERA

abstract:
  At HERA, new physics processes beyond the SM are probed in e^+/- proton
collisions at a center of mass energy of 300-318 GeV. Recent results on
searches obtained by the H1 and ZEUS experiments are presented with an emphasis
on data taken in e^-p collisions in the years 1998/99 and in e^+p collisions in
the years 1999 and 2000.


title: Frequentist and Bayesian Confidence Intervals

abstract:
  Frequentist (classical) and the Bayesian approaches to the construction of
confidence limits are compared. Various examples which illustrate specific
problems are presented. The Likelihood Principle and the Stopping Rule Paradox
are discussed. The performance of the different methods is investigated
relative to the properties coherence, precision, bias, universality,
simplicity. A proposal on how to define error limits in various cases are
derived from the comparison. They are based on the likelihood function only and
follow in most cases the general practice in high energy physics. Classical
methods are not recommended because they violate the Likelihood Principle, they
can produce physically inconsistent results, suffer from lack of precision and
generality. Also the extreme Bayesian approach with arbitrary choice of the
prior probability density or priors deduced from scaling laws is rejected.


title: An Indirect Search for WIMPs with Super-Kamiokande

abstract:
  A potential source of high energy neutrinos is the annihilation of Weakly
Interacting Massive Particles (WIMPs) collecting in gravitational potential
wells such as the centers of the Earth, the Sun, or the Galaxy. A search for
such a WIMP annihilation signal using the Super-Kamiokande (Super-K) detector
is presented. Super-K observes 1.1 upward through-going muons per day. These
events are caused by high energy (typical E_nu ~ 100 GeV) nu_mu interactions in
the rock under the detector, and are generally consistent with the expected
flux from atmospheric neutrinos. No enhancement of the neutrino signal due to
WIMP annihilation is seen, so upper limits on the possible flux of WIMPS are
set. These limits are compared to those from other such indirect searches, and
a model-independent method is used to compare the Super-K results with
direct-detection WIMP experiments.


title:
Discriminating between nu_mu <-> nu_tau and nu_mu <-> nu_sterile in
  atmospheric nu_mu oscillations with the Super-Kamiokande detector

abstract:
  A strong body of evidence now exists for atmospheric nu_mu disappearance
oscillations. Such disappearance could be explained by oscillations to either
nu_tau or a ``sterile'' neutrino (nu_s). Super-Kamiokande uses three different
methods to distinguish between these two scenarios. First, matter effects would
suppress the nu_mu <-> nu_s oscillation amplitude at high energy. Second,
oscillation to nu_s would reduce the overall neutral-current neutrino
interaction rate. Third, the smoking gun of nu_mu <-> nu_tau oscillations would
be the observation of tau appearance resulting from charged-current nu_tau
interactions. The results of these three techniques are presented, which
strongly favor nu_mu <-> nu_tau oscillations over nu_mu <-> nu_s.


title:
Ratio of the Isolated Photon Cross Sections at \sqrt{s} = 630 and 1800
  GeV

abstract:
  The inclusive cross section for production of isolated photons has been
measured in \pbarp collisions at $\sqrt{s} = 630$ GeV with the \D0 detector at
the Fermilab Tevatron Collider. The photons span a transverse energy ($E_T$)
range from 7-49 GeV and have pseudorapidity $|\eta| < 2.5$. This measurement is
combined with to previous \D0 result at $\sqrt{s} = 1800$ GeV to form a ratio
of the cross sections. Comparison of next-to-leading order QCD with the
measured cross section at 630 GeV and ratio of cross sections show satisfactory
agreement in most of the $E_T$ range.


title:
Measurement of the ratio of the differential cross sections for W and Z
  boson production as a function of transverse momentum in pbarp collisions at
  sqrt(s)=1.8TeV

abstract:
  We report on a preliminary measurement of the ratio of the differential cross
sections for W and Z boson production as a function of transverse momentum in
proton-antiproton collisions at $\sqrt{s}$ = 1.8 TeV. It has been shown that
the ratio between W and Z observables can be reliably calculated using
perturbative QCD, even when the individual observables are not. We present the
first comparison between the measurement of a W and Z observable ratio and a
purely perturbative calculation. The use of the ratio reduces both experimental
and theoretical uncertainites and might result in smaller overall uncertainties
on the measured W mass and width, compared to currently used methods at hadron
colliders.


title: Results and Future Plans from Bes

abstract:
  The values of $R = \sigma(e^+e^-\to{hadrons})/ \sigma(e^+e^-\to\mu^+\mu^-)$
for 85 center-of-mass energies between 2 and 5 GeV are reported. Preliminary
results using partial wave analysis for $J/\psi$ decays to $\gamma \pi^+
\pi^-$, $\gamma K^+K^-$, $\phi \pi^+\pi^-$ and $\phi K^+K^-$ are presented. The
BESIII/BEPCII, a project for the future of BES, is introduced.


title:
Evidence for a narrow dip structure at 1.9 GeV/c$^2$ in $3\pi^+ 3\pi^- $
  diffractive photoproduction

abstract:
  A narrow dip structure has been observed at 1.9 GeV/c$^2$ in a study of
diffractive photoproduction of the $~3\pi^+3\pi^-$ final state performed by the
Fermilab experiment E687.


title: Searches for New Physics at HERA

abstract:
  Recent results from searches for new physics at HERA are reviewed. Exploiting
the uniqueness of lepton-hadron collisions at high energy, searches are
performed for electron-quark resonant states (leptoquarks or squarks in
R-parity-violating supersymmetry) or excited states of fermions. New phenomena
at a very high energy scale, manifested at present energies as effective
four-fermion contact interaction, are also investigated, including cases with
lepton-flavor violation. Finally, the status of events with a high-energy
lepton and missing transverse momentum is presented, resulting in the most
stringent constraint on the flavor-changing neutral current t-u-\gamma coupling
which could yield single-top production.


title:
Search for Single Leptoquark and Squark Production in Electron-Photon
  Scattering at sqrt(s_ee) = 189 GeV at LEP

abstract:
  A search for first generation scalar and vector leptoquarks (LQ) as well as
for squarks in R-parity violating SUSY models has been performed using e+e-
collisions collected with the OPAL detector at LEP at an e+e- centre-of-mass
energy sqrt(s_ee) of 189 GeV. The data correspond to an integrated luminosity
of about 160 pb-1. The dominant process for this search is e q -> LQ/squark ->
e q, nu q, where a photon, which has been radiated by one of the beam
electrons, serves as a source of quarks. The numbers of selected events found
in the two decay channels are in agreement with the expectations from Standard
Model processes. This result allows to set lower limits at the 95% confidence
level on the mass of first generation scalar and vector leptoquarks, and of
squarks in R-parity violating SUSY models. For Yukawa couplings lambda to
fermions larger than sqrt{4 pi alpha_em}, the mass limits range from 121
GeV/c^2 to 175 GeV/c^2 (149 GeV/c^2 to 188 GeV/c^2) depending on the branching
ratio beta of the scalar (vector) leptoquark state. Furthermore, limits are set
on the Yukawa couplings lambda for leptoquarks and lambda'_1jk for squarks, and
on beta as a function of the scalar leptoquark/squark mass.


title:
The Inclusive Jet Cross Section in ppbar Collisions at sqrt{s}=1.8 TeV
  using the kT Algorithm

abstract:
  We present a preliminary measurement of the central inclusive jet cross
section using a successive combination algorithm based on relative transverse
momenta (kT) for jet reconstruction. We analyze a 87.3 pb-1 data sample
collected by the D0 detector at the Fermilab Tevatron ppbar Collider during
1994-1995. The cross section, reported as a function of transverse momentum (pT
> 60 GeV) in the central region of pseudo-rapidity (|eta| < 0.5), is in
reasonable agreement with next-to-leading order QCD predictions. This is the
first jet production measurement in a hadron collider using a successive
combination type of jet algorithm.


title:
Recent Results on High-Q2 Neutral and Charged Current Cross Sections at
  HERA

abstract:
  High-Q^2 NC and CC DIS cross sections have been measured by H1 and ZEUS at
HERA. Both NC and CC results based on data taken during the year 1994-2000 are
in good agreement with Standard Model expectations. The structure function xF_3
is extracted from the NC cross sections and the mass of the W propagator is
extracted from the CC cross sections. Valence quark distributions are derived
by means of an NLO QCD fit.


title: ALICE, the heavy ion experiment at LHC

abstract:
  ALICE, A Large Ion Collider Experiment, is the future Large Hadron Collider
(LHC) experiment at CERN devoted to the physics of Quantum
Chromo-thermo-dynamics. Relativistic Heavy-Ion Collisions (HIC) at LHC aim at
the production of a plasma of quarks and gluons (QGP). This plasma is expected
to be much hotter, bigger and longer than in previous HIC experiments at lower
center-of-mass energies. In the ALICE experiment, the ephemeral QGP created
during the first stages of the HIC will be studied by the concomitant detection
of most of the probes of high temperature strongly interacting matter.


title:
Calculations of neutrino spectra with a program based on the GEANT
  library

abstract:
  The methods of neutrino spectra calculations with GEANT library and the
peculiarities of such calculations for different neutrino beams are summarized.
The formula expressing $K^0$ yields from a neutrino target through the $K^+$
and $K^-$ yields from the same target is proposed


title: Jets and Event Shape Studies in ep-collisions at HERA

abstract:
  The results of complementary tests of perturbative QCD in DIS at large
centre-of-mass energies at HERA are presented. The analysis of event shape
variables allows for the investigation of approaches to understand aspects of
non-perturbative QCD such as the formation of the hadronic final state. The
strong coupling constant, $\alpha_s$, is extracted from both inclusive jet
cross sections and dijet rates and is found to be competitive with the world
average.


title: A new airborne detector for atmospheric muons

abstract:
  The University of Oxford has started the design and development of the new
experiment ADLER (Airborne Detector for Low Energy Rays). This apparatus will
measure the cosmic-ray muon flux at an altitude of 10 - 13km. The detector
should be flown by aircrafts on transatlantic routes crossing the magnetic
equator to investigate the flux at different geomagnetic latitudes. The goal of
the experiment is to obtain better constraints on the low energy atmospheric
neutrino flux and the results will be of importance to the atmospheric neutrino
anomaly.


title:
Search for the Familon via $B^{\pm}\to \pi^{\pm}X^{0}$, $B^{\pm}\to
  K^{\pm}X^{0}$, and $B^{0}\to K_{S}^{0} X^{0}$ Decays

abstract:
  We have searched for the two-body decay of the B meson to a light
pseudoscalar meson $h = \pi^+, K^+, K^0_S$ and a massless neutral
weakly-interacting particle $X^0$ such as the familon, the Nambu-Goldstone
boson associated with a spontaneously broken global family symmetry. We find no
significant signal by analyzing a data sample containing 9.7 million $B\bar{B}$
mesons collected with the CLEO detector at the Cornell Electron Storage Ring,
and set a 90% C.L. upper limit of $4.9 \times 10^{-5}$ and $5.3 \times 10^{-5}$
on the branching fraction for the decays $B^+ \to h^+ X^0$ and $B^0 \to K^0_S
X^0$, respectively. These upper limits correspond to a lower bound of about
$10^{8}$ GeV on the family symmetry breaking scale involving the third
generation of quarks.


title:
Search for New Physics Using Quaero: A General Interface to D0 Event
  Data

abstract:
  We describe Quaero, a method that i) enables the automatic optimization of
searches for physics beyond the standard model, and ii) provides a mechanism
for making high energy collider data generally available. We apply Quaero to
searches for standard model WW, ZZ, and ttbar production, and to searches for
these objects produced through a new heavy resonance. Through this interface,
we make three data sets collected by the D0 experiment at sqrt(s)=1.8 TeV
publicly available.


title: Subjet Multiplicity in Quark and Gluon Jets at Dzero

abstract:
  We measure the subjet multiplicity M in jets reconstructed with a successive
combination type of jet algorithm (kT). We select jets with 55<pT<100 GeV and
|eta|<0.5. We compare similar samples of jets at sqrt(s)=1800 and 630 GeV. The
HERWIG Monte Carlo simulation predicts that 59% of the jets are gluon jets at
sqrt(s)=1800 GeV, and 33% at sqrt(s)=630 GeV. Using this information, we
extract the subjet multiplicity in quark (Mq) and gluon (Mg) jets. We also
measure the ratio R= (<Mg> -1)/(<Mq>-1)= 1.84 +- 0.15(stat) +0.22-0.18(sys).


title:
Studying the $\omega$-mass in-medium in $\gamma + A\to \pi^0\gamma +X$
  reactions

abstract:
  Simulations based on a coupled-channel transport model have been performed to
analyze the feasibility to study the in-medium $\omega$ mass exploiting the
process $\gamma+A\to\pi^0\gamma+X$ for C, Ca and Nb nuclei. The distortions due
to final-state interactions of the $\pi^0$ and background contributions from
the reaction $\gamma+A\to\pi^0\pi^0+X$ are found to be small in the mass range
of interest ($0.6<M_{\pi^0\gamma}<0.8$ GeV). Furthermore, the effect of the
detector resolution on the $\pi^0\gamma$-mass determination is discussed.


title:
Measurements of Scintillation Efficiency and Pulse-Shape for Low Energy
  Recoils in Liquid Xenon

abstract:
  Results of observations of low energy nuclear and electron recoil events in
liquid xenon scintillator detectors are given. The relative scintillation
efficiency for nuclear recoils is 0.22 +/- 0.01 in the recoil energy range 40
keV - 70 keV. Under the assumption of a single dominant decay component to the
scintillation pulse-shape the log-normal mean parameter T0 of the maximum
likelihood estimator of the decay time constant for 6 keV < Eee < 30 keV
nuclear recoil events is equal to 21.0 ns +/- 0.5 ns. It is observed that for
electron recoils T0 rises slowly with energy, having a value ~ 30 ns at Eee ~
15 keV. Electron and nuclear recoil pulse-shapes are found to be well fitted by
single exponential functions although some evidence is found for a double
exponential form for the nuclear recoil pulse-shape.


title:
Charmless B Decays from BABAR (B0 --> K*0 gamma and B0 -->
  pi+pi-,K+pi-,K+K-)

abstract:
  The BABAR experiment has completed its first year of data-taking during which
21 $fb^{-1}$ of data were accumulated. We present preliminary results on two
types of charmless B decays based on this data sample. The first, $B^0 \to
K^{*0}\gamma$, is a so-called electromagnetic penguin. And the second, $B^0 \to
h^+h^{'-}$, where $h^{(')}$ can be either a pion or kaon, can come from either
penguin diagrams or Cabibbo suppressed tree diagrams.


title:
Measurement of $J/\psi$ production in continuum $e^+e^-$ annihilations
  near $\sqrt s = 10.6$ GeV

abstract:
  The production of $J/\psi$ mesons in continuum $e^+e^-$ annihilations has
been studied with the BABAR detector at energies near the $\Upsilon(4S)$
resonance, approximately 10.6 GeV. The mesons are distinguished from $J/\psi$
production in B decays through their center-of-mass momentum and energy. We
measure the cross section $e^+e^-\to J/\psi X$ to be $2.52\pm 0.21\pm 0.21$ pb;
for momentum above 2 GeV/c, it is $1.87\pm 0.10\pm 0.15$ pb. We set a 90%
confidence level upper limit on the branching fraction for direct
$\Upsilon(4S)$\to J/\psi X$ decays at $4.7\times 10^{-4}$.


title: SUSY Searches at the Tevatron

abstract:
  We discuss some of the latest results from supersymmetry searches at the
Tevatron


title: New results in diffractive production from E687 at FNAL

abstract:
  A narrow dip structure has been observed at 1.9 GeV/c$^2$ in a study of
diffractive photoproduction of the $~3\pi^+3\pi^-$ final state performed by the
Fermilab experiment E687. Preliminary results on new structures in
$~2\pi^+2\pi^-$ final states are also given.


title:
Measurement of dsigma/DM Forward-Backward Charge Asymmetry for High Mass
  Drell-Yan e+e- Pairs from p-pbar Collisions at sqrt(s)=1.8 TeV

abstract:
  We report on a measurement of the mass dependence of the forward-backward
charge asymmetry, A_FB, and production cross section dsigma/dM for e+e- pairs
with mass M_ee>40 GeV/c2. The data sample consists of 108 pb-1 of p-pbar
collisions at sqrt(s)=1.8 TeV taken by the Collider Detector at Fermilab during
1992-1995. The measured asymmetry and dsigma/dM are compared with the
predictions of the Standard Model and a model with an extra Z' gauge boson.


title:
Study of the $\pi\pi$ mass spectra in the process $e^+e^- \to
  \pi^+\pi^-\pi^0$ at $\sqrt[]{s} \simeq 1020$ MeV

abstract:
  The invariant mass spectra of the $\pi^+\pi^-$ and $\pi^\pm\pi^0$ pairs in
the process $e^+e^- \to \pi^+\pi^-\pi^0$ were studied in the SND experiment at
the VEPP-2M collider in the energy region $\sqrt[]{s} \simeq 1020$ MeV. These
studies were based on about $0.5 \times 10^6$ experimental events. The spectra
were analyzed in the framework of the vector meson dominance model. It was
found that the experimental data can be described with $e^+e^- \to \rho\pi \to
\pi^+\pi^-\pi^0$ transition only. Upper limit on the branching ratio of the
$\phi(1020)\to\pi^+\pi^-\pi^0$ decay through intermediate states different from
$\rho\pi$ was obtained at the 90 % confidence level:
$B(\phi\to\pi^+\pi^-\pi^0)<6 \cdot 10^{-4}$. The $\rho$-meson mass and width
which follow from the spectra analysis are $m_\rho=775.0\pm 1.3$ MeV,
$\Gamma_\rho=150.4 \pm 3.0$ MeV. Neutral and charged $\rho$-mesons mass
difference was found to equal $m_{\rho^\pm}-m_{\rho^0}=-1.3\pm2.3$ MeV. In the
$\pi^+\pi^-$ mass spectrum the $\rho-\omega$ interference was seen at two
standard deviations level.


title: Matter Effects in Upward-Going Muons and Sterile Neutrino Oscillations

abstract:
  The angular distribution of upward-going muons produced by atmospheric
neutrinos in the rock below the MACRO detector show anomalies in good agreement
with two flavor neutrino-mu ==> neutrino-tau oscillations with maximum mixing
and Delta m**2 around 0.0024 eV**2. Exploiting the dependence of magnitude of
the matter effect on oscillation channel, and using a set of 809 upward-going
muons observed in MACRO, we show that the two flavor neutrino-mu ==>
neutrino-sterile oscillation is disfavored with 99% C.L. with respect to
neutrino-mu ==> neutrino-tau.


title: Higgs Searches at the Tevatron

abstract:
  This paper describes the searches for the Higgs boson performed by the CDF
and D0 collaborations at the Tevatron ppbar Collider using the data collected
in the 1992-95 run. Searches for standard model Higgs and as well for neutral
and charged minimal SUSY Higgs bosons are also presented. No signal has been
observed and limits are set for production cross sections.


title: Study of the fragmentation of b quarks into B mesons at the Z peak

abstract:
  The fragmentation of b quarks into B mesons is studied with four million
hadronic Z decays collected by the ALEPH experiment during the years 1991-1995.
A semi-exclusive reconstruction of B->l nu D(*) decays is performed, by
combining lepton candidates with fully reconstructed D(*) mesons while the
neutrino energy is estimated from the missing energy of the event. The mean
value of xewd, the energy of the weakly-decaying B meson normalised to the beam
energy, is found to be mxewd = 0.716 +- 0.006 (stat) +- 0.006 (syst) using a
model-independent method; the corresponding value for the energy of the leading
B meson is mxel = 0.736 +- 0.006 (stat) +- 0.006 (syst). The reconstructed
spectra are compared with different fragmentation models.


title:
\sigma(e^+ e^- \to hadrons)$ at low energy: experimental status and
  prospects for the future. Its influence on $\alpha_{QED}(M^2_{Z})$ and
  $(g-2)_{\mu}$

abstract:
  In this talk I will review the recent experimental status of $\sigma(e^+ e^-
\to hadrons)$ at $\sqrt{s}<10 GeV$ and the prospects for the future. The
influence on $\alpha_{QED}(M^2_{Z})$ and $(g-2)_{\mu}$ is also discussed.


title:
Measurement of the Sigma^- Charge Radius by Sigma^- Electron Elastic
  Scattering

abstract:
  The Sigma^- mean squared charge radius has been measured in the space-like
Q^2 range 0.035-0.105 GeV^2/c^2 by elastic scattering of a Sigma^- beam off
atomic electrons. The measurement was performed with the SELEX (E781)
spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We
obtain <r^2> = (0.61 +/- 0.12 (stat.) +/- 0.09 (syst.)) fm^2. The proton and
pi^- charge radii were measured as well and are consistent with results of
other experiments. Our result agrees with the recently measured strong
interaction radius of the Sigma^-.


title: pp-Solar Neutrino Spectroscopy: Return of the Indium Detector

abstract:
  A new indium-loaded liquid scintillator (LS) with up to 15wt% In and high
light output promises a breakthrough in the 25y old proposal for observing pp
solar neutrinos (nue) by tagged nue capture in 115In. Intense background from
the natural beta-decay of In, the single obstacle blocking this project till
now, can be reduced by more than x100 with the new In-LS. Only non-In
background remains, dramatically relaxing design criteria. Eight tons of In
yields ~400 pp nue/y after analysis cuts. With the lowest threshold yet, Q=118
keV, In is the most sensitive detector of the pp nue spectrum, the long sought
touchstone for nue conversion.


title:
Linear Collider Physics Resource Book for Snowmass 2001 - Part 1:
  Introduction

abstract:
  This Resource Book reviews the physics opportunities of a next-generation
e+e- linear collider and discusses options for the experimental program. Part 1
contains the table of contents and introduction and gives a summary of the case
for a 500 GeV linear collider.


title:
Linear Collider Physics Resource Book for Snowmass 2001 - Part 2: Higgs
  and Supersymmetry Studies

abstract:
  This Resource Book reviews the physics opportunities of a next-generation
e+e- linear collider and discusses options for the experimental program. Part 2
reviews the possible experiments on Higgs bosons and supersymmetric particles
that can be done at a linear collider.


title:
Linear Collider Physics Resource Book for Snowmass 2001 - Part 3:
  Studies of Exotic and Standard Model Physics

abstract:
  This Resource Book reviews the physics opportunities of a next-generation
e+e- linear collider and discusses options for the experimental program. Part 3
reviews the possible experiments on that can be done at a linear collider on
strongly coupled electroweak symmetry breaking, exotic particles, and extra
dimensions, and on the top quark, QCD, and two-photon physics. It also
discusses the improved precision electroweak measurements that this collider
will make available.


title:
Linear Collider Physics Resource Book for Snowmass 2001 - Part 4:
  Theoretical, Accelerator, and Experimental Options

abstract:
  This Resource Book reviews the physics opportunities of a next-generation
e+e- linear collider and discusses options for the experimental program. Part 4
discusses options for the linear collider program, at a number of levels.
First, it presents a broad review of physics beyond the Standard Model,
indicating how the linear collider is relevant to each possible pathway. Next,
it surveys options for the accelerator and experimental plan, including the
questions of the running scenario, the issue of one or two interaction regions,
and the options for positron polarization, photon-photon collisions, and e-e-
collisions. Finally, it reviews the detector design issues for the linear
collider and presents three possible detector designs.


title: Search for Single Top Quark Production at DZero Using Neural Networks

abstract:
  We present a search for electroweak production of single top quarks in ~90
pb^-1 of data collected with the DZero detector at the Fermilab Tevatron
collider. Using arrays of neural networks to separate signals from backgrounds,
we set upper limits on the cross sections of 17 pb for the s-channel process
ppbar->tb+X, and 22 pb for the t-channel process ppbar->tqb+X, both at the 95%
confidence level.


title:
Improved Upper Limits on the FCNC Decays $B\to K\ell^{+}\ell^{-}$ and
  $B\to K^{*}(892)\ell^{+}\ell^{-}$

abstract:
  We have searched a sample of 9.6 million BBbar events for the flavor-changing
neutral current decays B -> K l^+ l^- and B -> K^*(892) l^+ l^-. We subject the
latter decay to the requirement that the dilepton mass exceed 0.5 GeV. There is
no indication of a signal. We obtain the 90% confidence level upper limits on
the branching fractions Br(B -> K l^+ l^-) < 1.7 \times 10^{-6} and Br(B ->
K^*(892) l^+ l^-) < 3.3 \times 10^{-6}. We also obtain an upper limit on the
weighted average 0.65 Br(B -> K l^+ l^-) + 0.35 Br(B -> K^*(892) l^+ l^-) < 1.5
\times 10^{-6}. The weighted-average limit is only 50% above the Standard Model
prediction.


title:
Search for Gluinos and Squarks Using Like-Sign Dileptons in p-pbar
  Collisions at sqrt(s)=1.8 TeV

abstract:
  We present results of the first search for like-sign dilepton (ee, e\mu,
\mu\mu) events associated with multijets and large missing energy using 106
pb^-1 of data in p-pbar collisions at sqrt(s)=1.8 TeV collected during 1992-95
by the CDF experiment. Finding no events that pass our selection, we examine
pair-production of gluinos and squarks in a constrained framework of the
Minimal Supersymmetric Standard Model. At tan_beta = 2 and \mu=-800 GeV/c^2, we
set 95% confidence level limits of M(gluino) > 221 GeV/c^2 for M(gluino) \simeq
M(squark), and M(gluino) > 168 GeV/c^2 for M(squark) \gg M(gluino), both with
small variation as a function of \mu.


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

abstract:
  We present a new measurement of the branching ratio of the decay K_L -> pi e
nu gamma (Ke3g) with respect to K_L -> pi e nu (Ke3), and the first study of
the photon energy spectrum in this decay. We find BR(Ke3g, E*g>30 MeV,
theta*_eg>20 deg)/BR(Ke3) = 0.908 +- 0.008 (stat.) +0.013-0.012 (syst.). Our
measurement of the spectrum is consistent with inner bremsstrahlung as the only
source of photons in Ke3g.


title: Identified Charged Particles in Quark and Gluon Jets

abstract:
  A sample of 2.2 million hadronic Z decays, selected from the data recorded by
the Delphi detector at LEP during 1994-1995 was used for an improved
measurement of inclusive distributions of pi+, K+ and p and their antiparticles
in gluon and quark jets. The production spectra of the individual identified
particles were found to be softer in gluon jets compared to quark jets, with a
higher multiplicity in gluon jets as observed for inclusive charged particles.
A significant proton enhancement in gluon jets is observed indicating that
baryon production proceeds directly from colour objects. The maxima, xi^*, of
the xi-distributions for kaons in gluon and quark jets are observed to be
different.


title: Solar Neutrino Results from Super-Kamiokande

abstract:
  Super-Kamiokande has measured the solar neutrino flux using elastic
neutrino-electron scattering in water. The measured flux is
$2.32\pm0.03$(stat)$^{+0.08}_{-0.07}$(syst)$\times10^6$/(cm$^2$s) based on the
energy range of 5 to 20 MeV for the recoiling electron. The time-dependence and
energy spectrum of the recoiling electrons were studied to search for
two-neutrino oscillation signatures. The absence of either significant zenith
angle flux variation or distortions of the recoil electron spectrum places
strong constraints on neutrino mass difference and mixing. In combination with
the flux measurement, two allowed regions at large mixing are found.


title:
Search for Leptoquark Pairs Decaying to nu-nu + jets in P Anti-P
  Collisions at s**1/2=1.8 TeV

abstract:
  We present the preliminary results of a search for leptoquark ($LQ$) pairs
using (85.2 $\pm$ 3.7) pb$^{-1}$ of $p{\bar p}$ collider data collected by the
DO experiment at the Fermilab Tevatron from 1994-1996. We observe no evidence
for leptoquark production and set a limit on $\sigma (p{\bar p} \to LQ\bar{LQ}
\to \nu\nu + jets)$ as a function of the mass of the leptoquark ($M_{LQ}$),
assuming BR($LQ \to \nu q$)=100%. At the 95% confidence level, we exclude
scalar leptoquarks for $M_{LQ} < 99 GeV/c^2$, and vector leptoquarks for
$M_{LQ} < 178 GeV/c^2$.