title: NA48 Results on Kaon and Hyperon Decays Relevant to |V_us|

abstract:
  New results from the NA48 experiment on kaon and hyperon decays relevant to
|V_us| are reported here. For charged kaons we present measurements of BR(K+-
-> pi0 e+- nu) and BR(K+- -> pi0 mu+- nu). On neutral kaon decays we report the
measurements of BR(K_L -> pi+ pi-) and of K_L -> pi+- mu-+ nu form factors
slopes. For hyperons we present results on the BR(Xi0 -> Sigma+ e- nu_e).


title:
Measurement of CP-Violating Asymmetries in B0-->(rhopi)0 Using a
  Time-Dependent Dalitz Plot Analysis

abstract:
  We report a measurement of CP-violating asymmetries in
B0-->(rhopi)0-->pi+pi-pi0 decays using a time-dependent Dalitz plot analysis.
The results are obtained from a data sample of 375 million Y(4S) --> BBbar
decays, collected by the BaBar detector at the PEP-II asymmetric-energy B
Factory at SLAC. We measure 26 coefficients of the bilinear form-factor terms
occurring in the time-dependent decay rate of the B0 meson. We derive the
physically relevant quantities from these coefficients. In particular, we
measure a constraint on the angle alpha of the Unitarity Triangle.


title:
Search for Lepton Flavor Violating tau^- Decays into \ell^-\eta,
  \ell^-\eta' and \ell^-\pi^0

abstract:
  We have searched for lepton-flavor-violating $\tau$ decays with a
pseudoscalar meson ($\eta$, $\eta'$ {and} $\pi^0$) using a data sample of 401
fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy
$e^+e^-$ collider. No evidence for these decays is found and we set the
following upper limits on the branching fractions: ${\cal{B}}(\tau^-\to
e^-\eta) < 9.2\times 10^{-8}$, ${\cal{B}}(\tau^-\to \mu^-\eta) < 6.5\times
10^{-8}$, ${\cal{B}}(\tau^-\to e^-\eta') < 1.6\times 10^{-7}$,
${\cal{B}}(\tau^-\to \mu^-\eta') < 1.3\times 10^{-7}$, ${\cal{B}}(\tau^-\to
e^-\pi^0) < 8.0\times 10^{-8}$ and ${\cal{B}}(\tau^-\to \mu^-\pi^0) < 1.2\times
10^{-7}$ at the 90% confidence level. These results improve our previously
published upper limits by factors from 2.3 to 6.3.


title:
Search for New Physics in Lepton + Photon + X Events with 929 pb-1 of
  ppbar Collisions at roots = 1.96 TeV (result for the summer'2006 conferences)

abstract:
  We present results of a search in 929 pb-1 of ppbar collisions at 1.96 TeV
for the anomalous production of events containing a charged lepton (electron or
muon) and a photon, both with high transverse momentum, accompanied by
additional signatures, X, including missing transverse energy and additional
leptons and photons. We use the same selection criteria as in the previous CDF
Run I search, but with an order-magnitude larger data set, a higher ppbar
collision energy, and the CDF II detector.


title:
Search for Anomalous Production of Events with a High Energy Lepton and
  Photon at the Tevatron

abstract:
  We present results of a search for for the anomalous production of events
containing a high-transverse momentum charged lepton (electron or muon) and
photon, accompanied by missing transverse energy (MET), and/or additional
leptons and photons, and jets (X). We use the same kinematic selection criteria
as in a previous CDF search, but with a substantially larger data set, 305pb-1,
a ppbar collision energy of 1.96 TeV, and the upgraded CDF II detector. We find
42 Lepton + Photon + MET events versus a standard model expectation of 37.3 +-
5.4 events. The level of excess observed in Run I, 16 events with an
expectation of 7.6 +- 0.7 events (corresponding to a 2.7 sigma effect), is not
supported by the new data. In the signature of Multi-Lepton + Photon we observe
31 events versus an expectation of 23.0 +- 2.7 events. In this sample we find
no events with an extra photon or MET and so find no events like the one 'two
electrons + two photons + MET' ('eeggmet') event observed in Run I.


title:
Precision measurements of the total and partial widths of the psi(2S)
  charmonium meson with a new complementary-scan technique in antiproton-proton
  annihilations

abstract:
  We present new precision measurements of the psi(2S) total and partial widths
from excitation curves obtained in antiproton-proton annihilations by Fermilab
experiment E835 at the Antiproton Accumulator in the year 2000. A new technique
of complementary scans was developed to study narrow resonances with
stochastically cooled antiproton beams. The technique relies on precise
revolution-frequency and orbit-length measurements, while making the analysis
of the excitation curve almost independent of machine lattice parameters. We
study the psi(2S) meson through the processes pbar p -> e+ e- and pbar p ->
J/psi + X -> e+ e- + X. We measure the width to be Gamma = 290 +- 25(sta) +-
4(sys) keV and the combination of partial widths Gamma_e+e- * Gamma_pbarp /
Gamma = 579 +- 38(sta) +- 36(sys) meV, which represent the most precise
measurements to date.


title: V_us from kaon decays

abstract:
  Recent measurements of kaon decays contributing to the determination of
|V_us| are summarized, and up-to-date evaluations of |V_us|f+(0) and |V_us| are
presented.


title:
New limits on Magnetic Monopoles searches from accelerator and
  non-accelerator experiments

abstract:
  Here the status of the searches for ``classical Dirac'' Magnetic Monopoles
(MMs) at accelerators and for GUT MMs in the cosmic radiation is discussed. We
present recent analysis for ``classical Dirac'' monopoles at accelerators and
the lowest flux upper limit for Magnetic Monopoles in the mass range 10$^{5}$ -
10$^{12}$ GeV obtained with the SLIM experiment at the Chacaltaya High Altitude
Laboratory (5290 m a.s.l.).


title: MACRO constraints on violation of Lorentz invariance

abstract:
  The energy spectrum of neutrino-induced upward-going muons in MACRO has been
analysed in terms of relativity principles violating effects, keeping standard
mass-induced atmospheric neutrino oscillations as the dominant source of
$\nu_{\mu} \to \nu_{\tau}$ transitions. The data disfavor these exotic
possibilities even at a sub-dominant level, and stringent 90% C.L. limits are
placed on the Lorentz invariance violation parameter $|\Delta v| < 6 \times
10^{-24}$ at $\sin 2{\theta}_v$ = 0 and $|\Delta v| < 2.5 \div 5 \times
10^{-26}$ at $\sin 2{\theta}_v$ = $\pm$1. These limits can also be
re-interpreted as upper bounds on the parameters describing violation of the
Equivalence Principle.


title: Observation of CP Violation in B0 -> K+pi- and B0 -> pi+pi-

abstract:
  We report observations of CP violation in the decays B0 -> K+pi- and B0 ->
pi+pi- in a sample of 383 million Y(4S) -> BBbar events. We find 4372 +/- 82 B0
-> K+pi- decays and measure the direct CP-violating charge asymmetry Akpi =
-0.107 +/- 0.018 (stat) +0.007-0.004 (syst), which excludes the CP-conserving
hypothesis with a significance of 5.5 standard deviations. In the same sample
we find 1139 +/- 49 B0 -> pi+pi- decays and measure the CP-violating
asymmetries Spipi = -0.60 +/- 0.11 (stat) +/- 0.03 (syst) and Cpipi = -0.21 +/-
0.09 (stat) +/- 0.02 (syst). CP conservation in B0 -> pi+pi- (Spipi=Cpipi=0) is
excluded at a confidence level 1-C.L. = 8 * 10^{-8}, corresponding to 5.4
standard deviations.


title: B0-->K0K0bar and Other Hadronic b-->d Decays

abstract:
  The b-->d penguin-dominated modes B-->KKbar have been observed at the B
factories. In addition, the BaBar Collaboration has reported the first
time-dependent CP-violation measurement in B0-->K0K0bar.


title: Search for the rare decay B to pi l+ l-

abstract:
  We have performed a search for the flavor-changing neutral-current decays B
--> pi l+l-, where l+l- is either e+e- or mu+mu-, using a sample of 230 million
Y(4S)-->BBbar decays collected with the BABAR detector. We observe no evidence
of a signal and measure the upper limit on the isospin-averaged branching
fraction to be BF(B --> pi l+ l-) < 9.1 x 10^{-8} at 90% confidence level. We
also search for the lepton-flavor--violating decays B --> pi e mu and measure
an upper limit on the isospin-averaged branching fraction of BF(B --> pi e mu)
< 9.2 x 10^{-8} at 90% confidence level.


title:
Measurement of the Time-Dependent CP Asymmetry in B0 --> D(*)0_CP h0
  Decays

abstract:
  We report a measurement of the time-dependent CP-asymmetry parameters $\cal
S$ and $\cal C$ in color-suppressed $B^0 \to D^{(*)0} h^0$ decays, where $h^0$
is a $\pi^0$, $\eta$, or $\omega$ meson, and the $D^0$ decays to one of the CP
eigenstates $K^+K^-$, $K_S\pi^0$, or $K_S\omega$. The data sample consists of
$383\times 10^{6}$ $\Upsilon(4S)\to B\bar{B}$ decays collected with the BABAR
detector at the PEP-II asymmetric-energy $B$-factory at SLAC. The results are
${\cal S}= -0.56 \pm 0.23 \pm 0.05$ and ${\cal C}= -0.23\pm 0.16\pm 0.04$,
where the first error is statistical and the second is systematic.


title: Evidence for D0-anti-D0 Mixing

abstract:
  We present evidence for D0-anti-D0 mixing in D0 --> K+pi- decays from 384
fb^{-1} of e+e- colliding-beam data recorded near sqrt(s) 10.6 GeV with the
BaBar detector at the PEP-II storage rings at SLAC. We find the mixing
parameters x'^2 = [-0.22 +- 0.30 (stat.) +- 0.21 (syst.)] x 10^{-3} and y' =
[9.7 +- 4.4 (stat.) +- 3.1 (syst.)] x 10^{-3}, and a correlation between them
of -0.94. This result is inconsistent with the no-mixing hypothesis with a
significance of 3.9 standard deviations. We measure R_D, the ratio of doubly
Cabibbo-suppressed to Cabibbo-favored decay rates, to be [0.303 +- 0.016
(stat.) +- 0.010 (syst.)]%. We find no evidence for \CP violation.


title: Improved Measurement of CP Violation in Neutral B Decays to c cbar s

abstract:
  We present updated measurements of time-dependent CP asymmetries in
fully-reconstructed neutral B decays to several CP eigenstates containing a
charmonium meson. The measurements use a data sample of (383 +/- 4) x 10^6
Y(4S)-> BBbar decays collected with the BABAR detector at the PEP-II B factory.
We determine sin2beta = 0.714 +/- 0.032 (stat) +/- 0.018 (syst) and |lambda| =
0.952 +/- 0.022 (stat) +/- 0.017 (syst).


title:
Tests of QCD Factorisation in the Diffractive Production of Dijets in
  Deep-Inelastic Scattering and Photoproduction at HERA

abstract:
  Measurements are presented of differential dijet cross sections in
diffractive photoproduction (Q^2<0.01 GeV^2) and deep-inelastic scattering
processes (DIS, 4<Q^2<80 GeV^2). The event topology is given by ep-> e X Y, in
which the system X, containing at least two jets, is separated from a leading
low-mass proton remnant system Y by a large rapidity gap. The dijet cross
sections are compared with NLO QCD predictions based on diffractive parton
densities previously obtained from a QCD analysis of inclusive diffractive DIS
cross sections by H1. In DIS, the dijet data are well described, supporting the
validity of QCD factorisation. The diffractive DIS dijet data are more
sensitive to the diffractive gluon density at high fractional parton momentum
than the measurements of inclusive diffractive DIS. In photoproduction, the
predicted dijet cross section has to be multiplied by a factor of approximately
0.5 for both direct and resolved photon interactions to describe the
measurements. The ratio of measured dijet cross section to NLO prediction in
photoproduction is a factor 0.5+-0.1 smaller than the same ratio in DIS. This
suppression is the first clear observation of QCD hard scattering factorisation
breaking at HERA. The measurements are also compared to the two soft colour
neutralisation models SCI and GAL. The SCI model describes diffractive dijet
production in DIS but not in photoproduction. The GAL model fails in both
kinematic regions.


title:
First observation and branching fraction and decay parameter
  measurements of the weak radiative decay Xi0 --> Lambda e+e-

abstract:
  The weak radiative decay Xi0 --> Lambda e+e- has been detected for the first
time. We find 412 candidates in the signal region, with an estimated background
of 15 +/- 5 events. We determine the branching fraction B(Xi0 --> Lambda e+e-)
= [7.6 +/- 0.4(stat) +/- 0.4(syst) +/- 0.2(norm)] x 10^{-6}, consistent with an
internal bremsstrahlung process, and the decay asymmetry parameter
alpha_{XiLambdaee} = -0.8 +/- 0.2, consistent with that of Xi0 --> Lambda
gamma. The charge conjugate reaction Xi0_bar --> Lambda_bar e+e- has also been
observed.


title: Small-x QCD studies with CMS at the LHC

abstract:
  The capabilities of the CMS experiment to study the low-x parton structure
and QCD evolution in the proton and the nucleus at LHC energies are presented
through four different measurements, to be carried out in Pb-Pb at sqrt(s_NN) =
5.5 TeV: (i) the charged hadron rapidity density $dN_{ch}/d\eta$ and (ii) the
ultraperipheral (photo)production of Upsilon; and in p-p at sqrt(s) = 14 TeV:
(iii) inclusive forward jets and (iv) Mueller-Navelet dijets (separated by
$Delta\eta\gtrsim$ 8).


title:
Measurement of the CKM angle alpha/phi2 with B -> rho rho decays at
  Belle and BABAR

abstract:
  We overview recent measurements in B -> rho rho decays which are based on
data samples collected at the PEP-II and KEKB asymmetric-energy e+e- colliders
with the BABAR and Belle detectors. Special emphasis is given to the
determination of the CP-violating coefficients A and S from an analysis of B ->
rho+ rho- decays. The values of A and S, branching fractions, and longitudinal
polarization fractions of B -> rho rho decays are used to constrain the
Cabibbo-Kobayashi-Maskawa phase alpha/phi2 using an isospin analysis; the
solution consistent with the standard model is 71 deg. < alpha < 113 deg. at 68
C.L.


title: Study of accelerator neutrino interactions in a liquid argon TPC

abstract:
  We study the potentialities of a 50 liter liquid argon TPC prototype operated
at the CERN WANF neutrino beam. We concentrate on the selection and
reconstruction of quasi-elastic events and measure the cross section for this
reaction.


title:
Measurement of the Relative Branching Fractions of Bbar --> D/D*/D** l^-
  anti-nu_l Decays in Events with a Fully Reconstructed B Meson

abstract:
  We determine the relative branching fractions of semileptonic B decays to
charmed final states. The measurement is performed on the recoil from a fully
reconstructed B meson in a sample of 362 million BBbar pairs collected at the
Upsilon(4S) resonance with the BaBar detector. A simultaneous fit to a set of
discriminating variables is performed on a sample of Bbar --> D X l^- anti-nu_l
decays to determine the contributions from the different channels. We measure
Gamma(B- --> D l^- anti-nu_l)/Gamma (B- --> D X l^- anti-nu_l)= 0.227 +/- 0.014
+/- 0.016, Gamma(B- --> D* l^- anti-nu_l)/Gamma (B- --> D X l^- anti-nu_l)=
0.582 +/- 0.018 +/- 0.030 and Gamma(B- --> D** l^- anti-nu_l)/Gamma (B- --> D X
l^- anti-nu_l)= 0.191 +/- 0.013 +/- 0.019 for the charged B sample, and
Gamma(B0bar --> D l^- anti-nu_l)/Gamma (B0bar --> D X l^- anti-nu_l)= 0.215 +/-
0.016 +/- 0.013, Gamma(B0bar --> D* l^- anti-nu_l)/Gamma (B0bar --> D X l^-
anti-nu_l)= 0.537 +/- 0.031 +/- 0.036 and Gamma(B0bar --> D** l^-
anti-nu_l)/Gamma (B0bar --> D X l^- anti-nu_l)= 0.248 +/- 0.032 +/- 0.030 for
the neutral B sample, where uncertainties are statistical and systematic,
respectively.


title:
Measurement of $\sigma_{\chi_{c2}} {\cal B}(\chi_{c2} \to J/\psi
  \gamma)/ \sigma_{\chi_{c1}} {\cal B}(\chi_{c1} \to J/\psi \gamma)$ in
  $p\bar{p}$ Collisions at $\sqrt{s} =$ 1.96 TeV

abstract:
  We measure the ratio of cross section times branching fraction, $R_p \equiv
\sigma_{\chi_{c2}} {\cal B}(\chi_{c2} \to J/\psi \gamma)/ \sigma_{\chi_{c1}}
{\cal B}(\chi_{c1} \to J/\psi \gamma)$, in 1.1 fb$^{-1}$ of $p\bar{p}$
collisions at $\sqrt{s} =$ 1.96 TeV. This measurement covers the kinematic
range $p_T(J/\psi)>4.0$ GeV/$c$, $|\eta(J/\psi)| < 1.0$, and $p_T(\gamma)>1.0$
GeV/$c$. For events due to prompt processes, we find $R_p =
0.395\pm0.016(stat.)\pm0.015(sys.)$. This result represents a significant
improvement in precision over previous measurements of prompt $\chi_{c1,2}$
hadroproduction.


title: B->h+h'- modes at CDF

abstract:
  We review CDF results and prospects on decays of B hadrons in two charged
charmless hadrons.


title: Production and Decay of Omega_c^0

abstract:
  We present an analysis of inclusive Omega_c^0 baryon production and decays in
230.5 fb^-1 of data recorded with the BABAR detector at the PEP-II
asymmetric-energy e+ e- collider at the Stanford Linear Accelerator Center.
Omega_c^0 baryons are reconstructed in four final states (Omega- pi+, Omega-
pi+ pi0, Omega- pi+ pi+ pi-, Xi- K- pi+ pi+) and the ratios of branching
fractions for these final states are measured. We also measure the momentum
spectrum of the Omega_c^0 baryons in the e+ e- center-of-mass frame. From the
spectrum, we observe Omega_c^0 production from B decays and in ccbar events,
and extract the two rates of production.


title: Searches for Permanent Electric Dipole Moments

abstract:
  A large number of well motivated searches for permanent Electric Dipole
Moments are presently under way which have a robust discovery potential. The
field has seen a number of novel ideas concerning both possible experimental
and theoretical approaches. Due to recent progress also searches in charged
particles seem to be feasible. Some aspects in this highly active field are
discussed.


title: CP Violation in B->eta'K0 and Status of SU(3)-related Decays

abstract:
  We present measurements from Belle and BABAR of the time-dependent
CP-violation parameters S and C in B->eta'K0 decays. Both experiments observe
mixing-induced CP violation with a significance of more than 5 standard
deviations in this b-> s penguin dominated mode. We also compare with
theoretical expectations and discuss the latest results for SU(3)-related
decays which are useful for obtaining bounds on the expected values of S and C.


title: KLOE results on kaon decays and summary status of Vus

abstract:
  Recent KLOE measurements allowing the extraction of the Vus element of the
CKM matrix are here briefly described. The status of the resulting value of Vus
is summarized. The perspectives for the completion of ongoing analyses are
discussed, with particular emphasis on the measurements of scalar form factor
slopes from study of KLmu3 and of Vus from the decay width of K+-l3.


title: A Combination of CDF and D0 Results on the Mass of the Top Quark

abstract:
  We summarize the top-quark mass measurements from the CDF and D0 experiments
at Fermilab. We combine published Run-I measurements with the most recent
Run-II measurements. Taking correlated uncertainties into account the resulting
preliminary world average top-quark mass is Mt=170.9+/-1.1(sta)+/-1.5(sys)
GeV/c2 assuming Gaussian systematic uncertainties. Adding in quadrature yields
a total uncertainty of 1.8 GeV/c2, corresponding to a relative precision of
1.1% on the mass of the top quark.


title:
Review of Exculsive B->D(*,**)lnu Decays -- Branching Fractions,
  Form-factors and |V_cb|

abstract:
  This paper reviews semileptonic decays of $B$-mesons to states containing
charm mesons, i.e., D, D*, D** and possible non-resonant D^{(*)}npi states as
well. The paper covers measurement of branching fractions, form-factors and,
most importantly, the magnitude of the CKM matrix element V_cb.


title: Evidence for $D^0 - \bar{D}^0$ Mixing

abstract:
  We observe evidence for $D^0 - \bar{D}^0$ mixing by measuring the difference
in apparent lifetime when a $D^0$ meson decays to the CP eigenstates $K^+K^-$
and $\pi^+\pi^-$, and when it decays to the final state $K^-\pi^+$. We find
$y_{CP}=(1.31\pm 0.32({\rm stat.})\pm 0.25({\rm syst.}))%$, 3.2 standard
deviations from zero. We also search for a CP asymmetry between $D^0$ and
$\bar{D}^0$ decays; no evidence for CP violation is found. These results are
based on 540 fb$^{-1}$ of data recorded by the Belle detector at the KEKB
$e^+e^-$ collider.


title:
Measurement of ${CP}\xspace$ Violation Parameters with a Dalitz Plot
  Analysis of $B^\pm \to D_{\pi^+\pi^-\pi^0} K^\pm$

abstract:
  We report the results of a CP violation analysis of the decay B+/- -->
D(pipipi0)K+/-, where D(pipipi0) indicates a neutral D meson detected in the
final state pi+pi-pi0, excluding K_S pi0. The analysis makes use of 324 million
e+e- --> BB events recorded by the BaBar experiment at the PEP-II e+e- storage
ring. By analyzing the pi+pi-pi0 Dalitz plot distribution and the B+/- -->
D(pipipi0)K+/- branching fraction and decay rate asymmetry, we calculate
parameters related to the phase gamma of the CKM unitarity triangle. We also
measure the magnitudes and phases of the components of the D0 --> pi+pi-pi0
decay amplitude.


title: Search for Neutral B-Meson Decays to a0pi, a0K, etarho0, and etaf0

abstract:
  We present a search for B0 decays to charmless final states involving an eta
meson, a charged pion and a second charged pion or kaon. The data sample
corresponds to 383x10^6 BBbar pairs collected with the BABAR detector operating
at the PEP-II asymmetric-energy B Factory at SLAC. We find no significant
signals and determine the following 90% C.L. upper limits: BR(B->a0-pi+) x
BR(a0- -> etapi-) < 3.1x10^-6, BR(B->a0-K+) x BR(a0- -> etapi-) < 1.9x10^-6,
BR(B->a0(1450)-pi+) x BR(a0(1450)- -> etapi-) < 2.3x10^-6, BR(B->a0(1450)-K+) x
BR(a0(1450)- -> etapi-) < 3.1x10^-6, BR(B->etarho0) < 1.5x10^-6, and BR(B->eta
f0(980)) x BR(f0(980)- -> pi+pi-) < 0.4x10^-6.


title:
New Measurements Using External Photon Conversion at a High Luminosity B
  Factory

abstract:
  We propose two novel methods for testing the standard model using external
photon conversion at a high-luminosity e^+e^- B factory proposed recently. The
first method is to measure the mixing-induced CP-violation parameter
S_{pi^0pi^0} in B^0 --> pi^0 pi^0 decays. The precision of S_{pi^0pi^0} is
estimated to be 0.23 from a Monte Carlo study for a data sample containing 50 x
10^9 BBbar pairs. We demonstrate that this measurement is crucial for reducing
the discrete ambiguity of the Cabibbo-Kobayashi-Maskawa angle phi_2 determined
from the isospin analysis with B --> pi pi decays. The second method is to
measure photon polarization in B^0 --> K^{*0}(--> K^+ pi^-) gamma decays using
the external photon conversion, and combine it with S_{K^{*}gamma} from B^0 -->
K^{*0}(--> K^0_S pi^0) gamma decays. This offers a promising way of determining
the hypothetical right-handed current amplitude and phase beyond the standard
model.


title:
Improved measurement of B0bar --> Ds-D+ and search for B0bar --> Ds+Ds-
  at Belle

abstract:
  We reconstruct B0bar --> Ds-D+ decays using a sample of 449 x 10^6 BBbar
pairs recorded by the Belle experiment, and measure the branching fraction to
be Br(B0bar --> Ds-D+)=[7.5 +- 0.2(stat) +- 0.8(syst) +- 0.8(Br's)] x 10^(-3).
A search for the related decay B0bar --> Ds+Ds- is also performed. Since we
observe no statistically significant signal an upper limit on the branching
fraction is set at 3.6 x 10^(-5) (90% C.L.).


title: A Study of Exclusive Charmless Semileptonic B Decay and |V_ub|

abstract:
  We study semileptonic B decay to the exclusive charmless states pi,
rho/omega, eta and eta' using the 16 fb-1 CLEO Upsilon(4S) data sample. We find
B(B^0 -> pi^-l^+nu) = (1.37 +- 0.15_stat +- 0.11_sys) x 10^-4 and B(B^0 ->
rho^- l^+ nu) = (2.93 +- 0.37_stat +- 0.37_sys) x 10^-4, and find evidence for
B^+ -> eta' l^+ nu, with B(B^+ -> eta' l^+ nu) = (2.66 +- 0.80_stat +- 0.56_sys
) x 10^-4. From our B -> pi l nu rate for q^2 > 16 GeV^2 and lattice QCD we
find |V_{ub}| = (3.6 +- 0.4_stat +- 0.2_syst +0.6-0.4_thy) x 10^-3.


title:
A Study of Exclusive Charmless Semileptonic B Decays and Extraction of
  |V_{ub}| at CLEO

abstract:
  We have studied semileptonic B decay to the exclusive charmless states pi,
rho/omega, eta and eta' using the full 15.5 fb^-1 CLEO Upsilon(4S) sample, with
measurements performed in subregions of phase space to minimize dependence on a
priori knowledge of the form factors involved. We find total branching
fractions B(B^0 -> pi^-l^+nu) = (1.37 +- 0.15_stat +- 0.11_sys) x 10^-4 and
B(B^0 -> rho^- l^+ nu) = (2.93 +- 0.37_stat +- 0.37_sys) x 10^-4. We find
evidence for B^+ -> eta' l^+ nu, with B(B^+ -> eta' l^+ nu) = (2.66 +-
0.80_stat +- 0.56_sys) x 10^-4 and 1.20 x 10^-4 < B(B^+ -> eta' l^+ nu) < 4.46
x 10^-4 (90% CL). We also limit B(B^+ -> eta l^+ nu) < 1.01 x 10^-4 (90% CL).
By combining our B -> pi l nu information with unquenched lattice calculations,
we find |V_ub| = (3.6 +- 0.4 +- 0.2 +0.6 -0.4) x 10^-3, where the errors are
statistical, experimental systematic, and theoretical systematic, respectively.


title: Heavy Quark Spectroscopy

abstract:
  With the discovery of new states in recent years, interest in spectroscopy
has revived. Recent experimental results in heavy flavour spectroscopy are
reviewed, including charmonium, bottomonium, charmed mesons and baryons and
bottom mesons.


title:
Response to a critique of the Borexino result in "A new experimental
  limit for the stability of the electron" by H.V. Klapdor-Kleingrothaus, I.V.
  Krivosheina and I.V. Titkova

abstract:
  A recently published article by Klapdor-Kleingrothaus et al. critiques the
limit on the stability of the electron obtained by the Borexino collaboration.
We respond here to the criticisms raised by Klapdor-Kleingrothaus and his
colleagues, and re-establish that our result is based on very conservative
premises and that the "indication of a signal of 1.4 $\sigma$" for the decay of
the electron in the $\gamma+\nu$ channel, reported by Klapdor-Kleingrothaus and
colleagues, is excluded by the Borexino result.


title:
Precise measurement of the top quark mass in the lepton+jets topology at
  CDF II

abstract:
  We present a measurement of the mass of the top quark from proton-antiproton
collisions recorded at the CDF experiment in Run II of the Fermilab Tevatron.
We analyze events from the single lepton plus jets final state ($t\bar t\to
W^+bW^-\bar b\to l\nu b q \bar q'\bar b$). The top quark mass is extracted
using a direct calculation of the probability density that each event
corresponds to the $t\bar t$ final state. The probability is a function of both
the mass of the top quark and the energy scale of the calorimeter jets, which
is constrained {\it in situ} by the hadronic $W$ boson mass. Using 167 events
observed in 955 pb$^{{-}1}$ of integrated luminosity, we achieve the single
most precise measurement of the top quark mass, 170.8 $\pm$ 2.2 (stat.) $\pm$
1.4 (syst.) GeV/$c^2$.


title: Diffractive Photoproduction of D*+/-(2010) at HERA

abstract:
  Diffractive photoproduction of D*+/-(2010) mesons was measured with the ZEUS
detector at the ep collider HERA, using an integrated luminosity of 78.6
pb^{-1}. The D* mesons were reconstructed in the kinematic range: transverse
momentum p_T(D*) > 1.9 GeV and pseudorapidity |eta(D*)| < 1.6, using the decay
D*+ -> D0 pi+_s followed by D0 -> K- pi+ (+c.c.). Diffractive events were
identified by a large gap in pseudorapidity between the produced hadronic state
and the outgoing proton. Cross sections are reported for photon-proton
centre-of-mass energies in the range 130 < W < 300 GeV and for photon
virtualities Q^2 < 1 GeV^2, in two ranges of the Pomeron fractional momentum
x_pom < 0.035 and x_pom < 0.01. The relative contribution of diffractive events
to the inclusive D*+/-(2010) photoproduction cross section is about 6%. The
data are in agreement with perturbative QCD calculations based on various
parameterisations of diffractive parton distribution functions. The results are
consistent with diffractive QCD factorisation.


title: 2beta+gamma from B0->D+KsPi- decays at BaBar: a simulation study

abstract:
  We present the results of a simulation study to perform the extraction of
2beta+gamma from B0->D+KsPi- decays through a time-dependent Dalitz analysis of
BaBar data.


title:
Search for B^0-> p p-bar, Lambda Lambda-bar and B^+ -> p Lambda-bar at
  Belle

abstract:
  We report on a new search for two-body baryonic decays of the B meson.
Improved sensitivity compared to previous Belle results is obtained from 414
fb^-1 of data that corresponds to 449 million B B-bar pairs, which were taken
on the Upsilon(4S) resonance and collected with the Belle detector at the KEKB
e^+e^- collider. No significant signals are observed and we set the 90%
confidence level upper limits: Br(B^0-> p pbar) <1.1X10^-7, Br(B^0-> Lambda
Lambda-bar) < 3.2X10^-7 and Br(B^+-> p Lambda-bar) < 3.2X10^-7.


title: The COMPASS Experiment at CERN

abstract:
  The COMPASS experiment makes use of the CERN SPS high-intensitymuon and
hadron beams for the investigation of the nucleon spin structure and the
spectroscopy of hadrons. One or more outgoing particles are detected in
coincidence with the incoming muon or hadron. A large polarized target inside a
superconducting solenoid is used for the measurements with the muon beam.
Outgoing particles are detected by a two-stage, large angle and large momentum
range spectrometer. The setup is built using several types of tracking
detectors, according to the expected incident rate, required space resolution
and the solid angle to be covered. Particle identification is achieved using a
RICH counter and both hadron and electromagnetic calorimeters. The setup has
been successfully operated from 2002 onwards using a muon beam. Data with a
hadron beam were also collected in 2004. This article describes the main
features and performances of the spectrometer in 2004; a short summary of the
2006 upgrade is also given.


title:
Precise Measurement of the Left-Right Cross Section Asymmetry in $Z$
  Boson Production by $\ee$ Collisions

abstract:
  We present a precise measurement of the left-right cross section asymmetry
($A_{LR}$) for $Z$ boson production by $\ee$ collisions. The measurement was
performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the
SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the
SLC electron beam was (63.0$\pm$1.1)%. Using a sample of 49,392 $\z0$ decays,
we measure $A_{LR}$ to be 0.1628$\pm$0.0071(stat.)$\pm$0.0028(syst.) which
determines the effective weak mixing angle to be $\swein=0.2292\pm0.0009({\rm
stat.})\pm0.0004({\rm syst.})$.}


title:
Experimental momentum spectra of identified hadrons in jets and the
  predictions from LPHD + MLLA

abstract:
  Experimental data on the shape of hadronic momentum spectra are compared with
theoretical predictions in the context of calculations in the Modified Leading
Log Approximation (MLLA), under the assumption of Local Parton Hadron Duality
(LPHD). Considered are experimental measurements at $e^+e^-$-colliders of
$\xi_p^*$, the position of the maximum in the distribution of
$\xi_p=\log(1/x_p)$, where $x_p=p/p_{beam}$. The parameter $\xi_p^*$ is
determined for various hadrons at various centre of mass energies. It is
interesting to look at the dependence of $\xi^*_p$ on the hadron type. This is
used to study the influence of the hadron type on the cut-off scale $Q_0$ in
the parton shower development. The dependence of $\xi^*_p$ on the centre of
mass energy is seen to be described adequately by perturbation theory. The
approach is made quantitative by extracting a value of $\alpha_s(m_Z)$ from an
overall fit to the scaling behaviour of $\xi^*_p$.


title:
An optimal method of moments to measure the charge asymmetry at the
  $Z^0$

abstract:
  Parity violation at LEP or SLC can be measured through the charge asymmetry.
An optimal method of moments is developed here to measure this asymmetry, as
well as similar asymmetries. This method is equivalent to the likelihood fit.
It is simpler in use, as it gives analytical formulas for both the asymmetry
and its statistical error. These formulas give the dependence of the accuracy
on the experimental angular acceptance explicitly.


title:
Observation of Anisotropic Event Shapes and Transverse Flow in Au+Au
  Collisions at AGS Energy

abstract:
  Event shapes for Au + Au collisions at 11.4 GeV/c per nucleon were studied
over nearly the full solid angle with the E877 apparatus. The analysis was
performed by Fourier expansion of azimuthal distributions of the transverse
energy (E_T) measured in different pseudorapidity intervals. For semicentral
collisions a pronounced event anisotropy is identified beyond that expected due
to fluctuations in particle multiplicity. The signal decreases for peripheral
and very central collisions. The amplitude of the flow signal reaches up to 7%
of the mean E_T.


title:
Measurement of the Charged Multiplicity of $Z \rightarrow b
  \overline{b}$ Events

abstract:
  Using an impact parameter tag to select an enriched sample of $Z \rightarrow
b \overline{b}$ events, we have measured the difference between the average
charged multiplicity of $Z \rightarrow b \overline{b}$ and $Z^0 \rightarrow
hadrons$ to be $\overline{n}_{b} - \overline{n}_{had} = 2.24\pm
0.30(\rm{stat.}) \pm 0.33(\rm{syst.})$ tracks per event. {}From this, we have
derived $\overline{n}_{b} - \overline{n}_{uds} = 3.31 \pm 0.41 \pm 0.79.$
Comparing this measurement with those at lower center-of-mass energies, we find
no evidence that $\overline{n}_{b} - \overline{n}_{uds}$ depends on energy.
This result is in agreement with a precise prediction of perturbative QCD, and
supports the notion that QCD remains asymptotically free down to the scale
$M_b^2$.


title:
Evidence for Top Quark Production in $\bar{p}p$ Collisions at
  $\sqrt{s}=1.8$ TeV

abstract:
  We summarize a search for the top quark with the Collider Detector at
Fermilab (CDF) in a sample of $\bar{p}p$ collisions at $\sqrt{s}$= 1.8 TeV with
an integrated luminosity of 19.3~pb$^{-1}$. We find 12 events consistent with
either two $W$ bosons, or a $W$ boson and at least one $b$ jet. The probability
that the measured yield is consistent with the background is 0.26%. Though the
statistics are too limited to establish firmly the existence of the top quark,
a natural interpretation of the excess is that it is due to $t\bar{t}$
production. Under this assumption, constrained fits to individual events yield
a top quark mass of $174 \pm 10^{+13}_{-12}$ GeV/c$^2$. The $t\bar{t}$
production cross section is measured to be $13.9^{+6.1}_{-4.8}$~pb. (Submitted
to Physical Review Letters on May 16, 1994).


title:
Measurement of alpha-s from energy-energy correlations at the Z0
  resonance

abstract:
  We have determined the strong coupling alpha-s from a comprehensive study of
energy-energy correlations (EEC) and their asymmetry (AEEC) in hadronic decays
of Z0 bosons collected by the SLD experiment at SLAC. The data were compared
with all four available predictions of QCD calculated up to O(alpha-s**2) in
perturbation theory, and also with a resummed calculation matched to all four
of these calculations. We find large discrepancies between alpha-s values
extracted from the different O(alpha-s**2) calculations. We also find a large
renormalization scale ambiguity in alpha-s determined from the EEC using the
O(alpha-s**2) calculations; this ambiguity is reduced in the case of the AEEC,
and is very small when the matched calculations are used. Averaging over all
calculations, and over the EEC and AEEC results, we obtain
alpha-s(MZ)=0.124+0.003-0.004(exp.) +-0.009(theory).


title: Cumulant to Factorial Moment Ratio and Multiplicity Data

abstract:
  The ratio of cumulant to factorial moments of experimental multiplicity
distributions has been calculated for $e^{+}e^{-}$ and $hh$ interactions in a
wide range of energies. As a function of the rank it exhibits an initial steep
decrease and a series of oscillations around zero. Those features cannot be
reproduced by the Negative Binomial Distribution. A comparable behaviour is
instead predicted in high-energy perturbative QCD. The presence of a
qualitatively similar behaviour for different processes and in wide energy
intervals suggests speaking of an approximate scaling of the cumulant to
factorial moment ratio.


title:
A Precise Measurement of the Weak Mixing Angle in Neutrino-Nucleon
  Scattering

abstract:
  We report a precise measurement of the weak mixing angle from the ratio of
neutral current to charged current inclusive cross-sections in deep-inelastic
neutrino-nucleon scattering. The data were gathered at the CCFR neutrino
detector in the Fermilab quadrupole-triplet neutrino beam, with neutrino
energies up to 600 GeV. Using the on-shell definition, ${\rm sin ^2\theta_W}
\equiv 1 - \frac{{\rm M_W} ^2}{{\rm M_Z} ^2}$, we obtain ${\rm sin ^2\theta_W}
= 0.2218 \pm 0.0025 ({\rm stat.}) \pm 0.0036 ({\rm exp.\: syst.}) \pm 0.0040
({\rm model})$.


title:
Phase transition time delays in irradiated superheated superconducting
  granules

abstract:
  The time difference between a particle interaction in a Superheated
Superconducting Granule (SSG) and the resulting phase transition signal has
been explored. Detectors containing Zn and Sn SSG were irradiated with neutrons
and protons to study the heating mechanism taking place in nuclear recoil and
ionizing events. Scattered neutrons have been detected by a scintillator
hodoscope behind the SSG with a recoil energy measurement resolution of 10% and
an interaction time resolution of 1ns. The fast transition of the metastable
granules allowed to determine the elapsed time between an energy deposition and
the phase transition signal. In the case of Sn granules, the results show that
the time distributions are narrow and independent of the deposited energy in
nuclear recoil and ionizing events. In Zn, however, the time distributions are
much broader and depend on the energy deposition in the granule.


title:
Quasiparticle and phonon propagation in superheated superconducting
  granules after nuclear recoils

abstract:
  The propagation of the excess of quasiparticles and phonons produced by a
nuclear recoil inside Sn and Zn superheated superconducting granules will be
discussed. The decay towards equilibrium of the initial disturbance is assumed
to be a thermal diffusion process described by a set of coupled heat flow
equations for the effective quasiparticle and phonon temperatures. The solution
is carried out analytically for a point source located anywhere inside the
superconducting granule with the initial energy distributed in both
quasiparticle and phonon systems. The calculated time delay between the neutron
interaction and the nucleation of the phase transition will be compared to the
time delay distributions obtained by irradiating Zn and Sn SSG detectors with a
70Me$\!$V neutron beam.


title:
Precise Determination of the Weak Mixing Angle from a measurement of ALR
  in e+e- -> Z0

abstract:
  In the 1993 SLC/SLD run, the SLD recorded 50,000 $\z0$ events produced by the
collision of longitudinally polarized electrons on unpolarized positrons at a
center-of-mass energy of 91.26 GeV. The luminosity-weighted average
polarization of the SLC electron beam was (63.0$\pm$1.1)\%. We measure the
left-right cross-section asymmetry in $\z0$ boson production, $\alr$, to be
0.1628$\pm$0.0071(stat.)$\pm$0.0028(syst.) which determines the effective weak
mixing angle to be $\swein=0.2292\pm0.0009({\rm stat.})\pm0.0004({\rm syst.}).$


title: Polarization of Valence and Sea Quarks in the Proton

abstract:
  Analysis was performed of semi-inclusive and inclusive spin asymmetries
determined from the polarized deep inelastic scattering by the Spin Muon
Collaboration. Combined analysis of data for polarized deuterium and hydrogen
targets allows for separate determination of spin carried by valence {\it u}
and {\it d} quarks and non-strange sea quarks as a function of $x_{Bj}$ in the
range $0.006<x_{Bj}<0.6$. It was found that polarization of valence {\it u}
quarks is positive and of valence {\it d} quarks is negative, whereas the sea
polarization is small and consistent with zero within errors.


title: LEP asymmetries and fits of the Standard Model

abstract:
  The lepton and quark asymmetries measured at LEP are presented. The results
of the Standard Model fits to the electoweak data presented at this conference
are given. The top mass obtained from the fit to the LEP data is
$172^{+13+18}_{-14-20}$ GeV; it is $177^{+11+18}_{-11-19}$ when also the
collider, $\nu$ and $A_{LR}$ data are included.


title:
Average Multiplicities in Gluon and Quark Jets in Higher-Order
  Perturbative QCD

abstract:
  The ratio of average multiplicities in gluon and quark jets is shown to
become noticeably smaller in higher-order QCD compared to its lowest order
value what improves agreement with experiment.
  QCD anomalous dimension has been calculated. It has been used to get energy
dependence of mean multiplicities.


title: A Neural Network for Locating the Primary Vertex in a Pixel Detector

abstract:
  Using simulated collider data for $p+p\rightarrow 2{\rm Jets}\ $ interactions
in a 2-barrel pixel detector, a neural network is trained to construct the
coordinate of the primary vertex to a high degree of accuracy. Three other
estimates of this coordinate are also considered and compared to that of the
neural network. It is shown that the network can match the best of the
traditional estimates.


title: Semileptonic Branching Fraction of Charged and Neutral B Mesons

abstract:
  An examination of leptons in ${\Upsilon (4S)}$ events tagged by reconstructed
$B$ decays yields semileptonic branching fractions of $b_-=(10.1 \pm 1.8\pm
1.4)\%$ for charged and $b_0=(10.9 \pm 0.7\pm 1.1)\%$ for neutral $B$ mesons.
This is the first measurement for charged $B$. Assuming equality of the charged
and neutral semileptonic widths, the ratio $b_-/b_0=0.93 \pm 0.18 \pm 0.12$ is
equivalent to the ratio of lifetimes. A postscript version is available through
World-Wide-Web in http://w4.lns.cornell.edu/public/CLNS/1994


title: Measurement of the B -> D^* l nu Branching Fractions and |Vcb|

abstract:
  We study the exclusive semileptonic B meson decays B- -> D*0 l- nu and B0 ->
D*+ l- nu using data collected with the CLEO II detector at CESR. We present
measurements of the branching fractions B(B0 -> D*+ l-nu) = 0.5/f00*
[4.49+/-0.32+/-0.39]% and B(B- -> D*0 l-nu) = 0.5/f+-*[5.13+/-0.54+/-0.64]%,
where f00 and f+- are the neutral and charged B meson production fractions at
the Upsilon(4s) resonance. Assuming isospion invariance and taking the charged
to neutral B meson lifetimes measured at higher energy machines, we determine
the ratio f+-/f00=1.04+/-0.14+/-0.13+-/-0.10; further assuming f+- + f00 = 1 we
also determine the partial width G(B->D* l nu) = 29.9+/-1.9+/-2.7+/-2.0 ns-1
(independent of f+-/f00). From this partial width we calculate B -> D* l nu
branching fractions that do not depend on f+-/f00, nor the individual B
lifetimes, but only on the charged to neutral lifetime ratio. The product of
the CKM matrix element |Vcb| times the normalization of the decay form factor
at the point of zero recoil of the D* meson, F(y=1), is determined from a
linear fit to the combined differential decay rate of the exclusive B->D* l nu
decays: |Vcb|F(y) = 0.0351 +/- 0.0019 +/- 0.0018 +/- 0.0008. Using theoretical
calculations of the form factor normalization we extract a value for |Vcb|.
LATEX (REVTEX style) file with uuencoded figures attached (uses PSBOX).
Available on WWW http://w4.lns.cornell.edu/public/CLNS/


title: Multiple Scattering Error Propagation in Particle Track Reconstruction

abstract:
  Particle track reconstruction capabilities of the silicon tracking detector
system have been studied. As the multiple Coulomb scattering (MCS) induces
unavoidable uncertainties on the coordinate measurement, the corresponding
error estimates and the associated correlations have been used to find the best
track fit parameters and their errors. Finally it permits to find the proper
particle characteristics, as vertex position and resolution, flight direction
and the error.


title:
Determination of the Strange Quark Content of the Nucleon from a
  Next-to-Leading-Order QCD Analysis of Neutrino Charm Production

abstract:
  We present the first next-to-leading-order QCD analysis of neutrino charm
production, using a sample of 6090 $\nu_\mu$- and $\bar\nu_\mu$-induced
opposite-sign dimuon events observed in the CCFR detector at the Fermilab
Tevatron. We find that the nucleon strange quark content is suppressed with
respect to the non-strange sea quarks by a factor $\kappa = 0.477 \:
^{+\:0.063}_{-\:0.053}$, where the error includes statistical, systematic and
QCD scale uncertainties. In contrast to previous leading order analyses, we
find that the strange sea $x$-dependence is similar to that of the non-strange
sea, and that the measured charm quark mass, $m_c = 1.70 \pm 0.19 \:{\rm
GeV/c}^2$, is larger and consistent with that determined in other processes.
Further analysis finds that the difference in $x$-distributions between $xs(x)$
and $x\bar s(x)$ is small. A measurement of the Cabibbo-Kobayashi-Maskawa
matrix element $|V_{cd}|=0.232 ^{+\:0.018}_{-\:0.020}$ is also presented.
uufile containing compressed postscript files of five Figures is appended at
the end of the LaTeX source.


title: CPT Tests in the Neutral Kaon System by FNAL E773

abstract:
  The FNAL experiment E773 has measured the phases Phi_{+-} = (43.35 +- 0.70 +-
0.79) degree and Phi_{00}-Phi_{+-} = (0.67 +- 0.85 +- 1.1) degree of the CP
violating parameters eta_{+-} and eta_{00} in the decay of neutral kaons into
two charged or neutral pions. These preliminary results test CPT symmetry and
show no evidence for a violation. In addition we present a preliminary
measurement of Delta m = m_L - m_S = (0.5286 +- 0.0029 +- 0.0022)*E+10 hbar/sec
and tau_S = (0.8929 +- 0.0014 +- 0.0014)*E-10 sec. The first errors are
statistical and the second errors are systematic for above results.


title: Top Mass from Electroweak Measurements

abstract:
  The electroweak measurements made at LEP using 1989-1993 data are presented
in preliminary form. The agreement with the Standard Model is satisfactory, and
allows a combined fit to all available data for the masses of the top quark and
standard Higgs boson. The fit yields M_t = 177 +11 -11 +18 -19 GeV/c2, where
the second error reflects the uncertainty in the Higgs mass.
  Talk given at the XXIXth Rencontre de Moriond, `QCD and High Energy Hadronic
Interactions', March 1994, Meribel France


title: Unbiased Estimators for Correlation Measurements

abstract:
  Higher order correlation measurements involve multiple event averages which
must run over unequal events to avoid statistical bias. We derive correction
formulas for small event samples, where the bias is largest, and utilize the
results to achieve savings in CPU time consumption for the star integral.
Results from a simple model of correlations illustrate the utility and
importance of these corrections. Single-event correlation measurements such as
in galaxy distributions and envisaged at RHIC must take great care to avoid
this unnecessary pitfall.

categories: hep-ex astro-ph chao-dyn comp-gas hep-ph nlin.CD nlin.CG


title:
Spin Asymmetry in Muon--Proton Deep Inelastic Scattering on a
  Transversely-Polarized Target

abstract:
  We measured the spin asymmetry in the scattering of 100 GeV
longitudinally-polarized muons on transversely polarized protons. The asymmetry
was found to be compatible with zero in the kinematic range $0.006<x<0.6$,
$1<Q^2<30\,~\mbox{GeV}^2$. {}From this result we derive the upper limits for
the virtual photon--proton asymmetry $A_2$, and for the spin structure function
$g_2$. For $x<0.15$, $A_2$ is significantly smaller than its positivity limit
$\sqrt{R}$.


title:
New Measurements of CP Violation Parameters as Tests of CPT in K Meson
  Decay

abstract:
  Using a technique which employs a pair of solid scintillator regenerators,
the E773 collaboration has measured several CP violation parameters in K meson
decay at Fermilab. We report new results for the phase of eta_+-, the K_L-K_S
mass difference, the K_S lifetime, and the phase difference
Arg(eta_00)-Arg(eta_+-) in K ->pi pi decay. In addition, we report a
measurement of the magnitude and phase of eta_+-gamma in K ->pi+ pi- gamma
decay. Our preliminary results are compared with theoretical expectations based
on CPT symmetry. (Glasgow ICHEP94 paper Ref. gls0167, set with REVTeX)


title: New Results from CLEO-II on Hadronic Decays of the Tau Lepton

abstract:
  Results on semi-hadronic decays of the $\tau$ lepton are presented, from
studies of $e^+e^-$ annihilation data obtained at the Cornell Electron Storage
Ring with the CLEO-II detector. Branching fractions have been measured for
decays to two, three and four hadrons, namely $\tau^-\!\!\rightarrow\! \nu_\tau
h^-\pi^0$, $\tau^-\!\!\rightarrow\! \nu_\tau h^-h^+h^-$, and
$\tau^-\!\!\rightarrow\! \nu_\tau h^-h^+h^-\pi^0$, where $h^\pm$ represents a
charged pion or kaon. CLEO-II has also observed decays with charged and/or
neutral kaons; preliminary results for branching ratios and structure arising
from the decay dynamics are given. Connections are made with predictions
derived from theoretical models, the Conserved Vector Current theorem, isospin
constraints and sum rules.


title: Probing Color Coherency Using High pT W Events at the TEVATRON

abstract:
  \D0 has used W --> e nu events associated with a high pT jet to probe for the
effects of extended source color dipole radiation in W-jet rapidity
correlations. We have also studied the low energy flow in these events and
shown an enhancement between the jet and the beam directions, indicating the
effects of color coherency.


title: Tevatron energy and luminosity upgrades beyond the Main Injector

abstract:
  The Fermilab Tevatron will be the world's highest energy hadron collider
until the LHC is commissioned, it has the world's highest energy fixed target
beams, and Fermilab will be the leading high energy physics laboratory in the
US for the foreseeable future. Following the demise of the SSC, a number of
possible upgrades to the Tevatron complex, beyond construction of the Main
Injector, are being discussed. Using existing technology, it appears possible
to increase the luminosity of the $\bar{p}p$ Collider to at least
$10^{33}$cm$^{-2}$sec$^{-1}$ (Tevatron-Star) and to increase the beam energy to
2 TeV (DiTevatron). Fixed target beam of energy about 1.5 TeV could also be
delivered. Leaving the existing Tevatron in the tunnel and constructing
bypasses around the collider halls would allow simultaneous 800 GeV fixed
target and $\sqrt{s}$ = 4 TeV collider operation. These upgrades would give
Fermilab an exciting physics program which would be complementary to the LHC,
and they would lay the groundwork for the construction of a possible post-LHC
ultra-high energy hadron collider. (Presented at the Eighth Meeting of the
Division of Particles and Fields Albuquerque, New Mexico, August 2-6, 1994.)


title:
Measurement of the polarization of Lambda0 AntiLambda0, Sigma+ and Xi-
  produced in a Sigma- beam of 330 GeV/c

abstract:
  The polarization of Lambda0, AntiLambda0, Sigma+ and Xi- inclusively produced
in Sigma- induced interactions at 330 GeV has been measured in the experiment
WA89 at CERN. This is the first measurement of polarization of baryons produced
by a hyperon beam. No polarization of AntiLambda is observed, as was also the
case in proton beam data. At transverse momenta of about 1 GeV/c Lambda0 and
Sigma+ show little polarization, significantly lower than in the proton beam
data, while Xi- have a polarization comparable to the polarization of Lambda0
produced in proton beams.


title: B+ and B0 Mean Lifetime Measurements

abstract:
  We review $B^+$ and $B^0$ mean lifetime measurements, including direct
measurements and determination of the lifetime ratio via measurements of the
ratio of branching ratios. We present world averages.


title:
Determination of the branching ratios $\Gamma (K_L \to 3 \pi^0) / \Gamma
  (K_L \to \pi^+ \pi^- \pi^0)$ and $\Gamma (K_L \to 3 \pi^0) / \Gamma (K_L \to
  \pi e \nu )$

abstract:
  Improved branching ratios were measured for the $K_L \to 3 \pi^0 $ decay in a
neutral beam at the CERN SPS with the NA31 detector: $\Gamma (K_L \to 3 \pi^0)
/ \Gamma (K_L \to \pi^+ \pi^- \pi^0) = 1.611 \pm 0.037$ and $\Gamma (K_L \to 3
\pi^0) / \Gamma (K_L \to \pi e \nu ) = 0.545 \pm 0.010$.
  From the first number an upper limit for $\Delta I =5/2$ and $\Delta I = 7/2
$ transitions in neutral kaon decay is derived. Using older results for the
Ke3/K$\mu $3 fraction, the 3$\pi^0$ branching ratio is found to be $\Gamma (K_L
\to 3 \pi^0 )/ \Gamma_{tot} = (0.211 \pm 0.003)$, about a factor three more
precise than from previous experiments.


title:
Measurement of the branching fraction for $\Upsilon (1S) \to \tau^+
  \tau^-$

abstract:
  We have studied the leptonic decay of the $\Upsilon (1S)$ resonance into tau
pairs using the CLEO II detector. A clean sample of tau pair events is
identified via events containing two charged particles where exactly one of the
particles is an identified electron. We find $B(\Upsilon(1S) \to \tau^+ \tau^-)
= (2.61~\pm~0.12~{+0.09\atop{-0.13}})%$. The result is consistent with
expectations from lepton universality.


title:
Search for top in D-Zero using the electron + jets channel with soft
  muon tagging

abstract:
  We present preliminary results for the search for the top quark in D-Zero in
the electron + jets channel where one of the b quark jets is tagged by means of
a soft muon, using 13.5 pb-1 of data. Standard model decay modes for the top
quark are assumed. We present the resulting top cross section and error as a
function of top mass using this channel combined with the dilepton channel and
the untagged lepton + jets channel . At present, no significant signal for top
quark production can be established.


title: Search for the Top Quark: Results from the D-Zero Experiment

abstract:
  We review the search for the top quark conducted by the D-Zero collaboration
using data from the Fermilab pbar-p collider. Based upon a preliminary analysis
of an integrated luminosity of about 13.5 pb-1, we have searched for t-tbar
production and decay in the experimental channels involving a pair of dileptons
(electron or muon) plus jets, or single leptons plus jets. Summed over all
channels, we observe 7 events in our data, to be compared with an expectation
from background processes of 3.2 +/- 1.1 events. The t-tbar ~cross-section
deduced from the small excess of events is presented as a function of the top
quark mass. The statistics are sufficiently limited that no clear evidence for
the existence of the top quark can be obtained. We also comment upon
contributions to the Parallel session devoted to the top quark at this
conference.


title: Search for top in lepton + jets in D-Zero using a topological tag

abstract:
  We have searched for production of t-tbar pairs in p-pbar interactions at 1.8
TeV center-of-mass energy at the FNAL Tevatron collider. The search assumes
standard model decay for top quark into W + b quark. We observe in e+jet and
mu+jet final states a small, not statistically significant, excess above the
background estimated by two different methods. The results presented are
preliminary.


title: Search for First and Second Generation Leptoquarks at D\O

abstract:
  A search for first and second generation leptoquarks has been done with the
D\O \ detector at Fermilab's p\={p} collider with $\sqrt{s}=1.8$ TeV. 95\% C.L.
mass limits for first generation scalar leptoquarks have been recently
published. The number for the total integrated luminosity used in the first
generation leptoquark analysis has changed (via a change in the total inelastic
cross section) since the publication. The new limits are 130 GeV/c$^{2}$ and
116 GeV/c$^{2}$ for a respective 100\% and 50\% decay branching ratio of the
leptoquark to electron. The preliminary upper limit on the cross section from
the search for second generation scalar leptoquarks has set limits on the mass
of the second generation leptoquark of 97 GeV/c$^{2}$ for 100\% branching to
muons and 80 GeV/c$^{2}$ for 50\% branching. In contrast with leptoquark
detection thresholds at e$^{+}$e$^{-}$ and e-p machines, these limits are
independent of the unknown coupling of the leptoquark to leptons and quarks.


title: Multiple Muon Measurements with MACRO

abstract:
  The MACRO experiment at Gran Sasso provides means for detailed studies of
multiple coincident penetrating cosmic ray muons. In this paper we concentrate
on the studies of the ultrahigh energy primary cosmic ray composition using
muon bundle multiplicities, muon pair lateral and angular separation
distributions.


title: Search for Supersymmetric Wino and Zino States Using the D0 Detector

abstract:
  The status of a search for the pair production of the lightest chargino and
second lightest neutralino states of the minimal supersymmetric model is
presented. We have searched for four tri-lepton final states: eee, eemu, emumu,
and mumumu, all with missing transverse energy.


title: Search for Supersymmetry and Leptoquark States at FNAL

abstract:
  Searches have been made for first generation scalar and vector leptoquarks by
the D0 collaboration and for second generation scalar leptoquarks by the CDF
collaboration. Lower leptoquark mass limits were set. A search for squarks and
gluinos, predicted by Supersymmetric models, was made by D0 in the three or
more jets plus missing Et channel. The number of events observed was consistent
with background. Squark and gluino mass limits were set.


title: New Shower Maximum Trigger for Electrons and Photons at CDF

abstract:
  For the 1994 Tevatron collider run, CDF has upgraded the electron and photon
trigger hardware to make use of shower position and size information from the
central shower maximum detector. For electrons, the upgrade has resulted in a
50\% reduction in backgrounds while retaining approximately 90\% of the signal.
The new trigger also eliminates the background to photon triggers from
single-phototube discharge.


title: Measurement of Correlated $b$ Quark Cross Sections at CDF

abstract:
  Using data collected during the 1992-93 collider run at Fermilab, CDF has
made measurements of correlated $b$ quark cross section where one $b$ is
detected via a muon from semileptonic decay and the second $b$ is detected with
secondary vertex techniques. We report on measurements of the cross section as
a function of the momentum of the second $b$ and as a function of the azimuthal
separation of the two $b$ quarks, for transverse momentum of the initial $b$
quark greater than 15 GeV. Results are compared to QCD predictions.


title: Search for slowly moving magnetic monopoles

abstract:
  We report a search for slowly moving magnetic monopoles in the cosmic
radiation with the first supermodule of the MACRO detector at Gran Sasso. The
absence of candidates established an upper limit on the monopole flux of
$5.6\times10^{-15}\mbox{cm}^{-2}\mbox{sr}^{-1}\mbox{s}^{-1}$ at 90\% confidence
level for the velocity range of $1.8\times10^{-4}<\beta<3\times10^{-3}$.


title: Measurement of Correlated b quark Cross Sections at CDF

abstract:
  Using data collected during the 1992-1993 collider run at Fermilab, CDF has
made measurements of correlated $b$ quark cross sections where one $b$ is
detected from the lepton from semileptonic decay and the second $b$ is detected
with secondary vertex techniques. We report on measurements of the cross
section as a function of the momentum of the second $b$ and as a function of
the azimuthal separation of the two $b$ quarks, for transverse momentum of the
initial $b$ quark greater than 15 GeV. The vertex reconstruction techniques are
valid over a large range in transverse momentum, starting at a minimum of 10
GeV. Results are compared to QCD predictions.


title:
A Study of Events with Large Total Transverse Energy Produced in
  Proton-Antiproton Collisions at sqrt{s} = 1.8 Tev

abstract:
  Properties of events originating from proton--antiproton interactions in
which the total transverse energy of the event exceeded 400 GeV are presented.
Based on a data sample of 5.45 pb-1, the topology of these hard scattering
events as well as preliminary results for the cross--section versus total
transverse energy are presented and discussed.


title:
Polarized Bhabha Scattering and a Precision Measurement of the Electron
  Neutral Current Couplings

abstract:
  We present the first measurement of the left-right asymmetry in Bhabha
scattering with a polarized electron beam. The effective electron vector and
axial vector couplings to the Z0 are extracted from a combined analysis of the
polarized Bhabha scattering data and the left-right asymmetry previously
published by this collaboration.


title: Search for Top with D0 Detector in Dilepton Channel

abstract:
  Preliminary results from a search for high mass ttbar quark pair production
in ppbar collisions at sqrt(s)=1.8TeV with the D0 detector in the ee+jets,
emu+jets, and mumu+jets decay channels are presented. No conclusive evidence
for top quark production for an integrated luminosity of 13.5+/-1.6pb-1 is
observed.


title: VLPC Characterization for the Dzero Upgrade

abstract:
  We have studies the performance characteristics of approximately 4000 Visible
Light Photon Counters(VLPC) over a range of operating temperatures and biases.
We will describe the characterization procedure and present the measured gain,
noise and the relative quantum efficiency for the devices. We will also discuss
the general operation of the devices and the significant problems during the
characterization.


title:
Search for High Mass Top Quark Production in p anti-p Collisions at
  S**(1/2) = 1.8 TeV

abstract:
  We present new results on the search for the top quark in p anti-p collisions
at S**(1/2) = 1.8 TeV with an integrated luminosity of 13.5 +- 1.6 pb**(-1). We
have considered t anti-t production in the Standard Model using electron and
muon dilepton decay channels (t anti-t -> e mu + jets, e e + jets, and mu mu +
jets) and single-lepton decay channels (t anti-t -> e + jets and mu + jets)
with and without tagging of b quark jets. From all channels, we have 9 events
with an expected background of 3.8 +- 0.9. If we assume that the excess is due
to t anti-t production, and assuming a top mass of 180 GeV/c**2, we obtain a
cross section of 8.2 +- 5.1 pb.


title: A Measurement of the $D^{*\pm}$ Cross Section in Two-Photon Processes

abstract:
  We have measured the inclusive $D^{*\pm}$ production cross section in a
two-photon collision at the TRISTAN $e^+e^-$ collider. The mean $\sqrt{s}$ of
the collider was 57.16 GeV and the integrated luminosity was 150 $pb^{-1}$. The
differential cross section ($d\sigma(D^{*\pm})/dP_T$) was obtained in the $P_T$
range between 1.6 and 6.6 GeV and compared with theoretical predictions, such
as those involving direct and resolved photon processes.


title:
Measurement of the $D^{*\pm}$ Cross Section using a Soft-Pion Analysis
  in Two-Photon Processes

abstract:
  The differential cross section of $d\sigma(e^+e^-\to e^+e^-D^{*\pm}X)/dP_T$
was measured using a soft-pion analysis of $D^{*\pm}\to \pi_s^\pm
D^0(\bar{D^0})$ at TRISTAN. The average $\sqrt{s}$ was 58.1 GeV and the
integrated luminosity used in this analysis was 198 pb$^{-1}$, respectively.


title:
W-Jet Rapidity Correlations in $p\bar p$ Collisions at $\sqrt{s}=1.8$
  TeV

abstract:
  D0 has used W -> e nu events produced in association with a high $p_T$ jet to
examine the effects of strong radiative corrections. We have compared the
primary jet pseudorapidity distribution, as a function of reconstructed W
rapidity to leading order (LO) and next to leading order (NLO) QCD Monte
Carlos, as well as a model based on extended color dipoles. Our preliminary
analysis finds that the primary jet is more central than either LO or NLO
expectations and is in qualitative agreement with the color dipole model.


title: $K^0(\bar{K^0})$ Production in Two-Photon Processes at TRISTAN

abstract:
  We have carried out an inclusive measurement of $K^0(\bar{K^0})$ production
in two-photon processes at TRISTAN. The mean $\sqrt{s}$ was 58 GeV and the
integrated luminosity was 199 pb$^{-1}$. High-statistics $K_s$ samples were
obtained under such conditions as no-, anti-electron, and remnant-jet tags. The
remnant-jet tag, in particular, allowed us, for the first time, to measure the
cross sections separately for the resolved-photon and direct processes.


title:
On the Kinematic Reconstruction of Deep Inelastic Scattering at HERA:
  the $\Sigma$ Method

abstract:
  We review and compare the reconstruction methods of the inclusive deep
inelastic scattering variables used at HERA. We introduce a new prescription,
the $\Sigma$ method, which allows to measure the structure function of the
proton $F_2(x,Q^2)$ in a large kinematic domain, and in particular in the low
x-low$Q^2$ region, with small systematic errors and small radiative
corrections. A detailed comparison between the $\Sigma$ method and the other
methods is shown. Extensions of the $\Sigma$ method are presented. The effect
of QED radiation on the kinematic reconstruction and on the structure function
measurement is discussed.


title:
New Tagging Method of B Flavor of Neutral B Meson in CP Violation
  Measurement in Asymmetric B-Factory Experiment

abstract:
  In CP violation measurements in asymmetric B-factory experiments, a
determination of the B flavor of the neutral B mesons is necessary. A new
method to this purpose using only three vectors of charged particles has been
developed. This method (weighted charge method) does not require either lepton
identification or charged-kaon identification. The tagging efficiency,
probability for incorrect tagging, and effective tagging efficiency of this
method are 43.1, 18.3, and 17.3\%, respectively.


title:
Observation of Target Electron Momentum Effects in Single-Arm M\o ller
  Polarimetry

abstract:
  In 1992, L.G. Levchuk noted that the asymmetries measured in M\o ller
scattering polarimeters could be significantly affected by the intrinsic
momenta of the target electrons. This effect is largest in devices with very
small acceptance or very high resolution in laboratory scattering angle. We use
a high resolution polarimeter in the linac of the polarized SLAC Linear
Collider to study this effect. We observe that the inclusion of the effect
alters the measured beam polarization by -14% of itself and produces a result
that is consistent with measurements from a Compton polarimeter. Additionally,
the inclusion of the effect is necessary to correctly simulate the observed
shape of the two-body elastic scattering peak.


title: Test of Various Photocathodes

abstract:
  A test of various photocathodes was carried out. The tested materials were
CsI, CsTe, their multi-layers and so on. The quantum efficiencies of the
various materials were measured under a vacuum and/or after exposure to several
kinds of gases.


title:
Study of a Threshold Cherenkov Counter Based on Silica Aerogels with Low
  Refractive Indices

abstract:
  To identify $\pi^{\pm}$ and $K^{\pm}$ in the region of $1.0\sim 2.5$ GeV/c, a
threshold Cherenkov counter equipped with silica aerogels has been
investigated. Silica aerogels with a low refractive index of 1.013 have been
successfully produced using a new technique. By making use of these aerogels as
radiators, we have constructed a Cherenkov counter and have checked its
properties in a test beam. The obtained results have demonstrated that our
aerogel was transparent enough to make up for loss of the Cherenkov photon
yield due to a low refractive index. Various configurations for the photon
collection system and some types of photomultipliers, such as the fine-mesh
type, for a read out were also tested. From these studies, our design of a
Cherenkov counter dedicated to $\pi / K$ separation up to a few GeV/c %in the
momentum range of $1.0 \sim 2.5$ GeV/c with an efficiency greater than $90$ \%
was considered.


title:
Kinematic Evidence for Top Quark Pair Production in $W+$ Multijet Events
  in $p \bar p$ Collisions at $\sqrt{s}$~=~1.8 TeV

abstract:
  We present a study of $W+$multijet events that compares the kinematics of the
observed events with expectations from direct QCD $W+$jet production and from
production and decay of top quark pairs. The data were collected in the 1992-93
run with the Collider Detector at Fermilab from 19.3 pb$^{-1}$ of proton-anti
proton collisions at $\sqrt{s}=1.8$ TeV. From the $W+\geq 3$ jet events, a
"signal sample" with an improved ratio of $t \bar{t}$ to QCD produced $W$
events is selected by requiring each jet to be emitted centrally in the event
center of mass frame. This sample contains 14 events with unusually hard jet
E$_T$ distributions not well described by expectations for jets from direct QCD
$W$ production and other background processes. Using expected jet E$_T$
distributions, a relative likelihood is defined and used to determine if an
event is more consistent with the decay of $t \bar{t}$ pairs, with M$_{top}$~=~
170 GeV/c$^2$, than with direct QCD $W$ production, while only 1.7 such
top--like events are expected in the absence of $t \bar{t}$. Good agreement in
the jet spectra is obtained if jet production from $t \bar{t}$ pair decays is
included. For those events kinematically more consistent with $t \bar{t}$ we
find evidence for a $b$-quark content in their jets to the extent expected from
top decay, and larger than expected for background processes. For events with
four or more jets, the discrepancy with the predicted jet energy distributions
from direct QCD $W$ production, and the associated excess of $b$-quark content
is more pronounced.


title:
Feasibility Study of Single-Photon Counting Using a Fine-mesh Phototube
  for an Aerogel Readout

abstract:
  The fine-mesh phototube is one type of photodetector which can be used under
a strong magnetic field. For an aerogel readout, the single-photon detection
efficiency should be close to 100\% in order to identify particle species. We
carried out a feasibility study of single-photon counting using fine-mesh
phototubes, and obtained a possible solution.


title:
Measurement of inclusive electron cross section in $\gamma \gamma$
  collisions at TRISTAN

abstract:
  We have studied open charm production in $\gamma \gamma$ collisions with the
TOPAZ detector at the TRISTAN $e^{+}e^{-}$ collider. In this study, charm
quarks were identified by electrons (and positrons) from semi-leptonic decays
of charmed hadrons. The data corresponded to an integrated luminosity of 95.3
pb$^{-1}$ at a center-of-mass energy of 58 GeV. The results are presented as
the cross sections of inclusive electron production in $\gamma \gamma$
collisions with an anti-tag condition, as well as the subprocess cross
sections, which correspond to resolved-photon processes. The latter were
measured by using a sub-sample with remnant jets. A comparison with various
theoretical predictions based on direct and resolved-photon processes showed
that our data prefer that with relatively large gluon contents in a photon at
small $x (x \le 0.1)$, with the next-to-leading order correction, and with a
charm-quark mass of 1.3 GeV.


title:
Measurement of the forward-backward asymmetries for charm- and
  bottom-quark pair productions at $<\sqrt{s}>$=58GeV with electron tagging

abstract:
  We have measured, with electron tagging, the forward-backward asymmetries of
charm- and bottom-quark pair productions at $<\sqrt{s} >$=58.01GeV, based on
23,783 hadronic events selected from a data sample of 197pb$^{-1}$ taken with
the TOPAZ detector at TRISTAN. The measured forward-backward asymmetries are
$A_{FB}^c = -0.49 \pm 0.20(stat.) \pm 0.08 (sys.)$ and $A_{FB}^b = -0.64 \pm
0.35(stat.) \pm 0.13 (sys.)$, which are consistent with the standard model
predictions.


title: J/psi,psi(2S) to mu+ mu- and B to J/psi,psi(2S) Cross Sections

abstract:
  This paper presents a measurement of J/psi,psi(2S) differential cross
sections in p-pbar collisions at square root s = 1.8 TeV. The cross sections
are measured above 4 GeV/c in the central region (|eta| < 0.6) using the dimuon
decay channel. The fraction of events from B decays is measured, and used to
calculate b quark cross sections and direct J/psi,psi(2S) cross sections. The
direct cross sections are found to be more than an order of magnitude above
theoretical expectations.


title: $B$ Meson Lifetimes at CDF

abstract:
  Measurements of the $B_u$, $B_d$, and $B_s$ meson lifetime using semileptonic
$B_u \rightarrow e \nu D^0 X, B_d \rightarrow e \nu D^* X, B_s \rightarrow l
\nu D_s X$ events and exclusive $B_u \rightarrow \psi^{(\prime)} K^{(*)}, B_d
\rightarrow \psi^{(\prime)} K^{(*)}_{(s)}, B_s \rightarrow \psi \phi$ events
are presented. These results used the precise position measurements of the CDF
SVX silicon vertex detector and were obtained from a 19.3 pb$^{-1}$ sample of
1.8 TeV $\overline{p}p$ collisions collected in 1992-93 at the Fermilab
Tevatron collider. Comparisons with previous measurements will be shown.


title:
Measurement of inclusive particle spectra and test of MLLA prediction in
  $e^+e^-$ annihilation at $\sqrt{s}$=58GeV

abstract:
  Inclusive momentum spectra are measured for all charged particles and for
each of $\pi^{\pm}$, $K^{\pm}$, $K^0/\bar{K^0}$, and $p/\bar{p}$ in hadronic
events produced via $e^+e^-$ annihilation at $\sqrt{s}$=58GeV . The measured
spectra are compared with QCD predictions based on the modified leading log
approximation(MLLA). The MLLA model reproduces the measured spectra well. The
energy dependence of the peak positions of the spectra is studied by comparing
the measurements with those at other energies. The energy dependence is also
well described by the MLLA model.


title:
Measurement of W and Z Production Cross-sections in p-pbar Collisions at
  Sqrt(s)=1.8 TeV

abstract:
  The cross sections for W and Z production in p-pbar collisions at sqrt(s)=1.8
TeV are measured using the D0 detector at the Fermilab Tevatron collider. The
detected final states are W->e nu, Z->ee, W->mu nu, and Z->mu mu. In the ratio
of these measurements, many common sources of systematic error cancel and we
measure the ratio of the W and Z cross-sections. Assuming standard model
couplings, this result is used to determine the width of the W boson and to set
a limit on the decay W->t-bbar.


title: Measurement of the Bs Meson Lifetime

abstract:
  The lifetime of the $B_s$ meson is measured using the semileptonic decay $B_s
\to D_s^- \ell^+ \nu X$. The data sample consists of 19.3 pb$^{-1}$ of $p
\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV collected by the CDF detector at
the Fermilab Tevatron collider during 1992-1993. There are $76 \pm 8$ $\ell^{+}
D_s^{-}$ signal events where the $D_s$ is identified via the decay $D_s^{-} \to
\phi \pi^{-}$,~$\phi \to K^+ K^-$. Using these events, the $B_s$ meson lifetime
is determined to be $\tau_{s} = 1.42^{+ 0.27}_{- 0.23} {\rm (stat)} \pm 0.11
{\rm (syst)}$ ps. A measurement of the $B_s$ lifetime in a low statistics
sample of exclusive $B_s \to J/\psi \phi$ decays is also presented in this
paper.


title:
A Technique for Directly Measuring the Gravitational Acceleration of
  Antihydrogen

abstract:
  The gravitational force on antimatter has never been directly measured. A
method is suggested for measuring the acceleration of antimatter $(\bar g)$ by
measuring the deflection of a beam of neutral antihydrogen atoms in the Earth's
gravitational field. While a simple position measurement of the beam could be
used, a more efficient measurement can be made using a transmission
interferometer. A 1% measurement of $\bar g$ should be possible from a beam of
about 100,000 atoms, with the ultimate accuracy being determined largely by the
number of antihydrogen atoms that can be produced. A method is suggested for
producing an antihydrogen beam appropriate for this experiment.


title:
Search for New Particles Decaying to Dijets in p-pbar Collisions at
  sqrt(s)=1.8 TeV

abstract:
  We have used 19 pb**-1 of data collected with the Collider Detector at
Fermilab to search for new particles decaying to dijets. We exclude at 95%
confidence level models containing the following new particles: axigluons with
mass between 200 and 870 GeV, excited quarks with mass between 80 and 570 GeV,
and color octet technirhos with mass between 320 and 480 GeV.


title:
Observation of Excess $\Lambda(\bar{\Lambda})$ Production in Two-Photon
  Processes at TRISTAN

abstract:
  We have carried out inclusive measurements of $\Lambda(\bar{\Lambda})$
production in two-photon processes at TRISTAN. The mean $\sqrt{s}$ was 58 GeV
and the integrated luminosity was 265 pb$^{-1}$. Inclusive $\Lambda
(\bar{\Lambda})$ samples were obtained under such conditions as no-electron,
anti-electron, and remnant-jet tags. The data were compared with theoretical
calculations. The measured cross sections are two-times larger than the
leading-order theoretical predictions, suggesting the necessity of
next-to-leading-order Monte-Carlo generator.


title:
Measurement of alpha_s(M_Z^2) from Hadronic Event Observables at the Z^0
  Resonance

abstract:
  The strong coupling alpha_s(M_Z^2) has been measured using hadronic decays of
Z^0 bosons collected by the SLD experiment at SLAC. The data were compared with
QCD predictions both at fixed order, O(alpha_s^2), and including resummed
analytic formulae based on the next-to-leading logarithm approximation. In this
comprehensive analysis we studied event shapes, jet rates, particle
correlations, and angular energy flow, and checked the consistency between
alpha_s(M_Z^2) values extracted from these different measures. Combining all
results we obtain alpha_s(M_Z^2) = 0.1200 \pm 0.0025(exp.) \pm 0.0078(theor.),
where the dominant uncertainty is from uncalculated higher order contributions.


title: Electron identification using the TOPAZ detector at TRISTAN

abstract:
  We present an electron-identification method using the time-projection
chamber and the lead-glass calorimeter in the TOPAZ detector system. Using this
method we have achieved good electron identification against hadron backgrounds
over a wide momentum range in the hadronic events produced by both
single-photon exchange and two-photon processes. Pion-rejection factors and
electron efficiencies were 163 and 68.4\% for high-$P_T$ electrons and 137 and
42.7\% for low-$P_T$ electrons in the single-photon-exchange process, and 8600
and 36.0\% for the two-photon process, respectively.


title: A TEST OF THE FLAVOR INDEPENDENCE \\[.1in] OF STRONG INTERACTIONS

abstract:
  We present a comparison of the strong couplings of light ($u$,~$d$,~and~$s$),
$c$, and $b$ quarks determined from multijet rates in flavor-tagged samples of
hadronic $Z^0$ decays recorded with the SLC Large Detector at the SLAC Linear
Collider. Flavor separation on the basis of lifetime and decay multiplicity
differences among hadrons containing light, $c$, and $b$ quarks was made using
the SLD precision tracking system. We find:
  $\alpha_s^{uds}/{\alpha_s^{\rm all}} = 0.987 \pm 0.027({\rm stat}) \pm
0.022({\rm syst}) \pm 0.022({\rm theory})$,
  $\alpha_s^c/{\alpha_s^{\rm all}} = 1.012 \pm 0.104 \pm 0.102 \pm 0.096$, and
$\alpha_s^b/{\alpha_s^{\rm all}} = 1.026 \pm 0.041 \pm 0.041\pm 0.030.$


title: A Search for Jet Handedness in Hadronic $Z^0$ Decays

abstract:
  We have searched for signatures of polarization in hadronic jets from $Z^0
\to q \bar{q}$ decays using the ``jet handedness'' method. The polar angle
asymmetry induced by the high SLC electron-beam polarization was used to
separate quark jets from antiquark jets, expected to be left- and
right-polarized, respectively. We find no evidence for jet handedness in our
global sample or in a sample of light quark jets and we set upper limits at the
95% C.L. of 0.063 and 0.099 respectively on the magnitude of the analyzing
power of the method proposed by Efremov {\it et al.}


title:
A novel approach to error function minimization for feedforward neural
  networks

abstract:
  Feedforward neural networks with error backpropagation (FFBP) are widely
applied to pattern recognition. One general problem encountered with this type
of neural networks is the uncertainty, whether the minimization procedure has
converged to a global minimum of the cost function. To overcome this problem a
novel approach to minimize the error function is presented. It allows to
monitor the approach to the global minimum and as an outcome several
ambiguities related to the choice of free parameters of the minimization
procedure are removed.


title:
The Charge Asymmetry in W-Boson Decays Produced in p-pbar Collisions at
  sqrt(s) = 1.8 TeV

abstract:
  The charge asymmetry has been measured using $19,039~W$ decays recorded by
the CDF detector during the 1992-93 run of the Tevatron Collider. The asymmetry
is sensitive to the ratio of $d$ and $u$ quark distributions to $x<0.01$ at
$Q^2 \approx M_W^2$, where nonperturbative effects are minimal. It is found
that of the two current sets of parton distributions, those of Martin, Roberts
and Stirling (MRS) are favored over the sets most recently produced by the CTEQ
collaboration. The $W$ asymmetry data provide a stronger constraints on $d/u$
ratio than the recent measurements of $F_2^{\mu n}/F_2^{\mu p}$ which are
limited by uncertainties originating from deutron corrections.


title: Mechanical Design of the CDF SVX~II Silicon Vertex Detector

abstract:
  A next generation silicon vertex detector is planned at CDF for the 1998
Tevatron collider run with the Main Injector. The SVX~II silicon vertex
detector will allow high luminosity data-taking, enable online triggering of
secondary vertex production, and greatly increase the acceptance for heavy
flavor physics at CDF. The design specifications, geometric layout, and early
mechanical prototyping work for this detector are discussed.


title: Upsilon Production at CDF

abstract:
  We report on measurements of the Upsilon(1S), Upsilon(2S) and Upsilon(3S)
differential and integrated cross sections in pp(bar) collisions at sqrt(s)=1.8
TeV. The three resonances were reconstructed through the decay
Upsilon-->mu(+)mu(-). The cross section measurements are compared to
theoretical models of direct bottomonium production.


title:
Observation of hard scattering in photoproduction events with a large
  rapidity gap at HERA

abstract:
  Events with a large rapidity gap and total transverse energy greater than 5
GeV have been observed in quasi-real photoproduction at HERA with the ZEUS
detector. The distribution of these events as a function of the $\gamma p$
centre of mass energy is consistent with diffractive scattering. For total
transverse energies above 12 GeV, the hadronic final states show predominantly
a two-jet structure with each jet having a transverse energy greater than 4
GeV. For the two-jet events, little energy flow is found outside the jets. This
observation is consistent with the hard scattering of a quasi-real photon with
a colourless object in the proton.


title:
Measurement of multiplicity and momentum spectra in the current
  fragmentation region of the Breit frame at HERA

abstract:
  Charged particle production has been measured in Deep Inelastic Scattering
(DIS) events using the ZEUS detector over a large range of $Q^2$ from 10 to
$1280 {\rm\ GeV}^2$. The evolution with $Q$ of the charged multiplicity and
scaled momentum has been investigated in the current fragmentation region of
the Breit frame. The data are used to study QCD \linebreak coherence effects in
DIS and are compared with corresponding \ee~data in order to test the
universality of quark fragmentation.


title:
Time Dependence of Coherent $P^{0}\bar{P}^{0}$ Decays and CP Violation
  at Asymmetric $B$ Factories

abstract:
  A generic formalism is presented for the time-dependent or time-integrated
decays of any coherent $P^{0}\bar{P}^{0}$ system ($P^{0} = K^{0}, D^{0},
B^{0}_{d}$, or $B^{0}_{s}$). To meet various possible measurements at
asymmetric $B$ factories, we reanalyze some typical signals of CP violation in
the coherent $B^{0}_{d}\bar{B}^ {0}_{d}$ transitions. The advantage of proper
time cuts is illustrated for measuring mixing parameters and CP violation. We
show that the direct and indirect CP asymmetries are distinguishable in neutral
B decays to CP eigenstates. The possibility to detect the CP- forbidden
processes at the $\Upsilon (4S)$ resonance is explored in some detail.


title: Study of D*(2010)+- Production in ep Collisions at HERA

abstract:
  We report the first observation of charmed mesons with the ZEUS detector at
HERA using the decay channel ${\rm D}^{*+}\rightarrow (\Do \rightarrow {\rm
K}^-\pi^+)\pi^+$ (+ c.c.). Clear signals in the mass difference $\Delta
M$=$M$(D$^*$)--$M$(D$^0)$ as well as in the $M(K\pi)$ distribution at the D$^0$
mass are found. The $ep$ cross section for inclusive \DSpm\ production with
$Q^2<4~\GeV^2$ in the $\gamma p$ centre-of-mass energy range $115 < W < 275$
\GeV\ has been determined to be $(32 \pm 7^{+4}_{-7} )$ nb in the kinematic
region \mbox{\{$p_T(\DS)\geq $ 1.7 \,\GeV, $|\eta(\DS)| < 1.5 $\}}.
Ex\-tra\-po\-la\-ting outside this region, assuming a mass of the charm quark
of 1.5 \GeV, we estimate the $ep$ charm cross section to be $\sigma(e p
\rightarrow c \bar{c}X ) = (0.45 \pm 0.11^{+0.37}_{-0.22}) \, \mu {\rm b} $ at
\mbox{$\sqrt{s} = 296$}~\GeV\ and $\langle W \rangle = 198$ \GeV. The average
$\gamma p$ charm cross section \mbox{$\sigma(\gamma p \rightarrow c \bar{c}X
)$} is found to be \mbox{$(6.3 \pm 2.2^{+6.3}_{-3.0}) \, \mu {\rm b} $} at
$\langle W \rangle = 163$ \GeV\ and \mbox{$(16.9 \pm 5.2^{+13.9}_{-8.5}) \, \mu
{\rm b} $} at $\langle W \rangle = 243$ \GeV. The increase of the total charm
photoproduction cross section by one order of magnitude with respect to low
energy data experiments is well described by QCD NLO calculations using
singular gluon distributions in the proton.


title: Jet production in high Q^2 deep-inelastic eo scattering at HERA

abstract:
  Two-jet production in deep-inelastic electron-proton scattering has been
studied for $160<Q^2<1280$~GeV$^2$, $0.01<x<0.1$ and $0.04<y<0.95$ with the
ZEUS detector at HERA. The kinematic properties of the jets and the jet
production rates are presented. The partonic scaling variables of the two-jet
system and the rate of two-jet production are compared to perturbative
next-to-leading order QCD calculations.


title:
Measurement of the Decay Asymmetry Parameters in $\Lambda_c^+ \to
  \Lambda\pi^+$ and $\Lambda_c^+ \to \Sigma^+\pi^0 $

abstract:
  We have measured the weak decay asymmetry parameters ($\aLC $) for two \LC\
decay modes. Our measurements are $\aLC = -0.94^{+0.21+0.12}_{-0.06-0.06} $ for
the decay mode $\Lambda_c^+ \to \Lambda\pi^+ $ and $\aLC = -0.45\pm 0.31 \pm
0.06$ for the decay mode $\Lambda_c \to \Sigma^+\pi^0 $. By combining these
measurements with the previously measured decay rates, we have extracted the
parity-violating and parity-conserving amplitudes. These amplitudes are used to
test models of nonleptonic charmed baryon decay.


title: Review of CP Violation Studies with B-Mesons at LHC

abstract:
  The Large Hadron Collider (LHC) proposed at CERN will be the ultimate source
of B-mesons. With the large number of B-mesons expected at LHC, a real
precision test of CP violation in B-meson decays will become possible. There
are already several efforts made to explore this possibility and a summary of
those activities is presented.


title: Monte Carlo Studies of a Novel LiF Radiator for RICH Detectors

abstract:
  We show that a multifaceted LiF radiator produces more Cherenkov light and
has better resolution per photon than a flat radiator slab when used in a ring
imaging Cherenkov counter. Such a system is being considered for the CLEO III
upgrade.


title:
Breakthrough into the Sub-eV Neutrino Mass Range: Status of the
  HEIDELBERG-MOSCOW Double Beta Decay Experiment with enriched $^{76}$Ge

abstract:
  Recent results of the Heidelberg-Moscow double beta decay experiment are
presented. After 8.6 kg$\cdot$a of measuring time no signal is seen for the
neutrinoless decay mode. A half-life limit of $T_{1/2}^{0\nu\beta\beta} >
5.1\cdot 10^{24}$~a is deduced which converts into a neutrino mass limit of
$\langle m_{\nu_e}\rangle < 0.68 $ eV (90\% CL). The experiment thus is the
first one penetrating into the sub-eV range for the neutrino mass. For the
$2\nu$ mode a half life of $T_{1/2}^{2\nu\beta\beta} = (1.53\pm0.04
_{stat}\pm0.13_{sys})\cdot 10^{24}$ a is derived. More than 10000 $2\nu$ double
beta events are observed. This is the first high statistics observation of this
nuclear decay mode. Limits on more exotic decay modes are also presented.
Concerning dark matter the experiment now gives the sharpest limits for the
observation of WIMPs.


title: Dijet Cross Sections in Photoproduction at HERA

abstract:
  Dijet production by almost real photons has been studied at HERA with the
ZEUS detector. Jets have been identified using the cone algorithm. A cut on xg,
the fraction of the photon energy participating in the production of the two
jets of highest transverse energy, is used to define cross sections sensitive
to the parton distributions in the proton and in the photon. The dependence of
the dijet cross sections on pseudorapidity has been measured for xg $\ge 0.75$
and xg $< 0.75$. The former is sensitive to the gluon momentum density in the
proton. The latter is sensitive to the gluon in the photon. The cross sections
are corrected for detector acceptance and compared to leading order QCD
calculations.


title: A Measurement of the Proton Structure Function $F_{\!2}(x,Q^2)$

abstract:
  A measurement of the proton structure function $F_{\!2}(x,Q^2)$ is reported
for momentum transfer squared $Q^2$ between 4.5 $GeV^2$ and 1600 $GeV^2$ and
for Bjorken $x$ between $1.8\cdot10^{-4}$ and 0.13 using data collected by the
HERA experiment H1 in 1993. It is observed that $F_{\!2}$ increases
significantly with decreasing $x$, confirming our previous measurement made
with one tenth of the data available in this analysis. The $Q^2$ dependence is
approximately logarithmic over the full kinematic range covered. The subsample
of deep inelastic events with a large pseudo-rapidity gap in the hadronic
energy flow close to the proton remnant is used to measure the "diffractive"
contribution to $F_{\!2}$.


title: Observation of Top Quark Production in Pbar-P Collisions

abstract:
  We establish the existence of the top quark using a 67 pb^-1 data sample of
Pbar-P collisions at Sqrt(s) = 1.8 TeV collected with the Collider Detector at
Fermilab (CDF).
  Employing techniques similar to those we previously published, we observe a
signal consistent with t-tbar decay to WW b-bbar, but inconsistent with the
background prediction by 4.8 sigma. Additional evidence for the top quark is
provided by a peak in the reconstructed mass distribution. We measure the top
quark mass to be
  176 +/-8(stat) +/- 10(sys.) GeV/c^2,
  and the t-tbar production cross section to be 6.8 +3.6 -2.4 pb.


title: Observation of the Top Quark

abstract:
  The DO collaboration reports on a search for the Standard Model top quark in
pbar-p collisions at Sqrt(s)=1.8TeV at the Fermilab Tevatron, with an
integrated luminosity of approximately 50pb-1. We have searched for t-tbar
production in the dilepton and single-lepton decay channels, with and without
tagging of b-quark jets. We observed 17 events with an expected background of
3.8+/-0.6 events. The probability for an upward fluctuation of the background
to produce the observed signal is 2.0E-6 (equivalent to 4.6 standard
deviations). The kinematic properties of the excess events are consistent with
top quark decay. We conclude that we have observed the top quark and measure
its mass to be 199^+19_21 (stat.)+/- 22 (syst.)GeV/c**2 and its production
cross section to be 6.4 +/- 2.2 pb.


title: A search for massive neutral bosons in orthopositronium decay

abstract:
  We have searched for an exotic decay of orthopositronium into a single photon
and a short-lived neutral boson in the hitherto unexplored mass region above
900 ${\rm keV}/{\it c}^{2}$, by noting that this decay is one of few remaining
candidates which could explain the discrepancy of the orthopositronium
decay-rate. A high-resolution measurement of the associated photon energy
spectrum was carried out with a germanium detector to search for a sharp peak
from this two-body decay. Our negative result provides the upper-limits
of\mbox{ }$2.0 \times 10^{-4}$ on the branching ratio of such a decay in the
mass region from 847 to 1013 ${\rm keV}/{\it c}^{2}$, and excludes the
possibility of this decay mode explaining the discrepancy in the
orthopositronium decay-rate.


title: First Measurement of the Deep--Inelastic Structure of Proton Diffraction

abstract:
  A measurement is presented, using data taken with the H1 detector at HERA, of
the contribution of diffractive interactions to deep-inelastic electron-proton
scattering. The diffractive contribution to the proton structure function is
evaluated as a function of the appropriate deep-inelastic scattering variables
using a class of deep-inelastic ep scattering events with no hadronic energy
flow in an interval of pseudo-rapidity adjacent to the proton beam direction.
The dependence of this contribution on x-pomeron is consistent with both a
diffractive interpretation and a factorisable ep diffractive cross section. A
first measurement of the deep-inelastic structure of the pomeron in the form of
a factorised structure function is presented. This structure function is
observed to be consistent with scale invariance.


title:
In-beam Tests of a Ring Imaging Cerenkov Detector With a Multianode
  Photomultiplier Readout

abstract:
  A ring-imaging \v{C}erenkov counter read out by a 100-channel PMT of active
area 10$\times$10 cm$^2$ was operated successfully in a test beam at the BNL
AGS with several radiator gases, including the heavy fluorocarbon
C$_4$F$_{10}$. Ring radii were measured for electrons, muons, pions and kaons
over the particle momentum range from 2 to 12 GeV/$c$, and a best resolution of
$\sigma_r/r = 2.3\%$ was obtained.


title: Measurement of the W Boson Mass

abstract:
  We present a measurement of the mass of the $W$ boson using data collected
with the CDF detector during the 1992-93 collider run at the Fermilab Tevatron.
A fit to the transverse mass spectrum of a sample of 3268 {\mbox{$W \rightarrow
\mu\nu$}} events recorded in an integrated luminosity of 19.7 pb$^{-1}$ gives a
mass $M_{W}^{\mu}=80.310\pm0.205\mbox{~(stat.)}\pm0.130\mbox{~(syst.)} \
\mbox{GeV/c}^{2}$. A fit to the transverse mass spectrum of a sample of 5718
{\mbox{$W \rightarrow e\nu$}} events recorded in 18.2 pb$^{-1}$ gives a mass
$M_{W}^{e}=80.490\pm0.145\mbox{~(stat.)}\pm0.175\mbox{~(syst.)} \
\mbox{GeV/c}^{2}$. Combining the electron and muon results, accounting for
correlated uncertainties, yields a mass $M_{W}=80.410\pm0.180 \
\mbox{GeV/c}^{2}$.


title: Charm from Hyperonsin the Future: Fermilab Experiment 781

abstract:
  Recent results from CERN experiment WA89 have shown that charmed baryons and
particularly charmed-strange baryons have a significant cross section in
$\Sigma^-$ beams. Fermilab experiment 781, which is currently under
construction, will utilize this fact to pursue a broad program of high
statistics studies of charmed baryons in the next Fermilab fixed target run.


title:
Limits on $WWZ$ and $WW\gamma$ couplings from $WW$ and $WZ$ production
  in $p\overline{p}$ collisions at $\sqrt{s} = 1.8$ TeV

abstract:
  Direct limits are set on $WWZ$ and $WW\gamma$ three-boson couplings in a
search for $WW$ and $WZ$ production with high transverse momentum in
$p\overline{p}$ collisions at $\sqrt{s} = 1.8$ TeV, using the Collider Detector
at Fermilab. The results are in agreement with the SU(2) $\times$ U(1) model of
electroweak interactions. Assuming Standard Model $WW\gamma$ coupling, the the
limits are interpreted as direct evidence for a non-zero $WWZ$ coupling at
subprocess energies near 500 GeV. Alternatively, assumiong identical $WWZ$ and
$WW\gamma$ couplings, bounds $-0.11 < \kappa < 2.27$ and $-0.81 < \lambda <
0.84$ are obtained at $95\%$ CL for a form factor scale 1000 GeV.


title:
Measurement of the $ZZ\gamma$ and $Z\gamma\gamma$ Couplings in $p\bar p$
  Collisions at $\sqrt{s} = 1.8$ TeV

abstract:
  We have directly measured the ZZ-gamma and Z-gamma-gamma couplings by
studying p pbar --> l+ l- gamma + X, (l = e, mu) events at the CM energy of
1.8$ TeV with the D0 detector at the Fermilab Tevatron Collider. A fit to the
transverse energy spectrum of the photon in the signal events, based on the
data set corresponding to an integrated luminosity of 13.9 pb^-1 ($13.3 pb^-1)
for the electron (muon) channel, yields the following 95% confidence level
limits on the anomalous CP-conserving ZZ-gamma couplings: -1.9 < h^Z_30 < 1.8
(h^Z_40 = 0), and -0.5 < h^Z_40 < 0.5 (h^Z_30 = 0), for a form-factor scale
Lambda = 500 GeV. Limits for the Z-gamma-gamma$ couplings and CP-violating
couplings are also discussed.


title: Photon Structure, as seen at HERA

abstract:
  At HERA, the electron-proton collider at DESY, Hamburg, the large flux of
almost on-shell photons accompanying the lepton beam is being used to shed new
light on the structure of the photon. Recent results are reviewed and
discussed, with emphasis on those aspects of the photon's nature which should
be understandable using perturbative QCD.


title:
Search for $W$ boson pair production in $p\bar{p}$ collisions at
  $\sqrt{s}~=~1.8~$~TeV

abstract:
  The results of a search for $W$ boson pair production in $p\bar{p}$
collisions at $\sqrt{s}=1.8$ TeV with subsequent decay to dilepton ($e\mu, ee
$, and $\mu\mu$) channels are presented. One event is observed with an expected
background of $0.56\pm0.13$ events with an integrated luminosity of
approximately 14 pb$^{-1}$. %$13.9\pm1.7$ pb$^{-1}$. Assuming equal strengths
for the $WWZ$ and $WW\gamma$ gauge boson coupling parameters $\kappa$ and
$\lambda$, limits on the CP-conserving anomalous coupling constants are
$-2.6<\Delta\kappa<2.8$ and $-2.2<\lambda<2.2$ at the 95% confidence level.


title:
Measurement of the $B$ Meson Differential Cross Section, $d\sigma/dp_T$,
  in $p\bar{p}$ Collisions at $\sqrt{s} = 1.8$ TeV

abstract:
  This paper presents the first direct measurement of the $B$ meson
differential cross section, $d\sigma/dp_T$, in $p\bar{p}$ collisions at
$\sqrt{s}=1.8$ TeV using a sample of $19.3 \pm 0.7$ pb$^{-1}$ accumulated by
the Collider Detector at Fermilab (CDF). The cross section is measured in the
central rapidity region $|y| < 1$ for $p_T(B) > 6.0$ GeV/$c$ by fully
reconstructing the $B$ meson decays $B^{+}\to J/\psi K^{+}$ and $B^{0}\to
J/\psi K^{*0}(892)$, where $J/\psi \to \mu^+\mu^-$ and $K^{*0} \to K^+ \pi^-$.
A comparison is made to the theoretical QCD prediction calculated at
next-to-leading order.