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19912026
Showing 2000 · hep-exShow all

33 papers · 2 filters

hep-ex2000★ 9 cited

Measurement of the cross-section and forward-backward charge asymmetry for the b and c-quark in e+e- annihilation with inclusive muons at sqrt(s) = 58 GeV

Y. Inoue

We have studied inclusive muon events using all the data collected by the TOPAZ detector at sqrt(s)=58 GeV with an integrated luminosity of 273pb-1. From 1328 inclusive muon events…

hep-ex2000★ 35 cited

First Measurement of the Ratio B(t-->Wb)/B(t-->Wq) and Associated Limit on the CKM Element Vtb

CDF Collaboration

We present the first measurement of the ratio of branching fraction R= B(t-->wb)/B(t-->Wq) from ppbar collisions at sqrt(s)=1.8 TeV. The data set corresponds to 109 pb-1 of data re…

hep-ex2000★ 6 cited

Measurement of the Two-Jet Differential Cross Section in proton-antiproton Collisions at sqrt{s} = 1800 GeV

CDF Collaboration

A measurement is presented of the two-jet differential cross section, d^3σ/dE_T dη_1 dη_2, at center of mass energy sqrt{s} = 1800 GeV in proton-antiproton collisions. The results…

hep-ex2000★ 3 cited

Lorentz Angle Measurement for CO2/Isobutane Gas Mixtures

K. Hoshina, K. Fujii, N. Khalatyan +10

We have developed a Lorentz angle measurement system for cool gas mixtures in the course of our R&D for a proposed JLC central drift chamber (JLC-CDC). The measurement system is ch…

hep-ex2000★ 99 cited

Measurement of B0d - B0d-bar mixing rate from the time evolution of dilepton events at the Upsilon(4S)

K. Abe

We report a determination of the B0d - B0d-bar mixing parameter Delta-m_d based on the time evolution of dilepton yields in Upsilon(4S) decays. The measurement is based on a 5.9 /f…

hep-ex2000★ 12 cited

Search for the Supersymmetric Partner of the Top-Quark in Collisions at

CDF Collaboration

We report on a search for the supersymmetric partner of the top quark (stop) produced in events using of collisions at $\sqrt{s} = 1.8 {…

hep-ex2000★ 56 cited

Search for Neutral Supersymmetric Higgs Bosons in Collisions at TeV

CDF collaboration

We present the results of a search for neutral Higgs bosons produced in association with quarks in final states with pb$…

hep-ex2000★ 15 cited

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

ZEUS Collaboration, J. Breitweg

A study of the antineutrino-jet mass spectrum in e^+p -> antineutrino+X events at center-of-mass energy 300 GeV has been performed with the ZEUS detector at HERA using an integrate…

hep-ex2000★ 21 cited

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

E787, :, S. Adler +45

The first search for the decay K^+ -> pi^+ pi^0 nu nubar has been performed with the E787 detector at BNL. Based on zero events observed in the kinematical search region defined by…

hep-ex2000★ 83 cited

Improved Measurement of the Positive Muon Anomalous Magnetic Moment

H. N. Brown

A new measurement of the positive muon's anomalous magnetic moment has been made at the Brookhaven Alternating Gradient Synchrotron using the direct injection of polarized muons in…

hep-ex2000★ 696 cited

Tau Neutrinos Favored over Sterile Neutrinos in Atmospheric Muon Neutrino Oscillations

Kamiokande Collaboration

The previously published atmospheric neutrino data did not distinguish whether muon neutrinos were oscillating into tau neutrinos or sterile neutrinos, as both hypotheses fit the d…

hep-ex2000

The First Results of K2K long-baseline Neutrino Oscillation Experiment

Taku Ishida

The first results of the K2K(KEK to Kamioka) long-baseline neutrino oscillation experiment are presented in this talk. In 1999 7.2x10^18 protons on target were delivered to the exp…

hep-ex2000★ 1 cited

Development of rf reference line for the linear collider

T. Naito, K. Ebihara, H. Hayano +1

The rf distribution system for the linear collider requires stable x-band(11.424GHz) rf phase signal over 25km length. In order to realize the distribution system, a fiber optic li…

hep-ex2000★ 31 cited

Measurement of the Decay Amplitudes of B0 --> J/psi K* and B0s --> J/psi phi Decays

T. Affolder

A full angular analysis has been performed for the pseudo-scalar to vector-vector decays, B0 --> J/psi K* and B_s --> J/psi phi, to determine the amplitudes for decays with parity-…

hep-ex2000★ 14 cited

Measurement of Direct Photon Emission in K^+ -> pi^+ pi^0 gamma Decay

E787 Collaboration

We have performed a measurement of the K^+ -> pi^+ pi^0 gamma decay and have observed 2 X 10^4 events. The best fit to the decay spectrum gives a branching ratio for direct photon…

hep-ex2000★ 26 cited

A study of the centrally produced eta pi0 and eta pi- systems in pp interactions at 450 GeV/c

The WA102 Collaboration, D. Barberis

A partial wave analysis of the centrally produced eta pi0 and eta pi- channels has been performed in pp collisions using an incident beam momentum of 450 GeV/c. Clear a0(980) and a…

hep-ex2000★ 77 cited

Measurement of the W Boson Mass with the Collider Detector at Fermilab

T. Affolder

We present a measurement of the W boson mass using data collected with the CDF detector during the 1994-95 collider run at the Fermilab Tevatron. A fit to the transverse mass spect…

hep-ex2000★ 79 cited

Measurement of the Top Quark Mass with the Collider Detector at Fermilab

The CDF Collaboration

This report describes a measurement of the top quark mass in $\ppbar$ collisions at a center of mass energy of 1.8 TeV. The data sample was collected with the CDF detector during t…

hep-ex2000★ 19 cited

Measurement of Rapidity Distribution for High Mass Drell-Yan ee Pairs at CDF

CDF Collaboration, T. Affolder

We report on the first measurement of the rapidity distribution dsigma/dy over nearly the entire kinematic region of rapidity for e^+e^- pairs in the Z-boson region of 66<M_{ee}<11…

hep-ex2000★ 3 cited

A search for charmonium states produced in central pp interactions at 450 GeV/c

The WA102 Collaboration, D. Barberis

A search for centrally produced charmonium states has been presented. There is no significant evidence for any charmonium production. An upper limit of 2 nb is found for the cross…

hep-ex2000★ 15 cited

A study of the omega omega channel produced in central pp interactions at 450 GeV/c

The WA102 Collaboration, D. Barberis

The reaction pp -> pf (omega omega) ps has been studied at 450 GeV/c and a spin analysis of the omega omega channel has been performed for the first time in central production. Evi…

hep-ex2000★ 42 cited

16-N as a calibration source for Super-Kamiokande

Kamiokande Collaboration, E. Blaufuss, G. Guillian

The decay of 16-N is used to cross check the absolute energy scale calibration for solar neutrinos established by the electron linear accelerator (LINAC). A deuterium-tritium neutr…

hep-ex2000★ 52 cited

Design, construction, and operation of SciFi tracking detector for K2K experiment

A. Suzuki, H. Park, K2K collaboration

We describe the construction and performance of a scintillating fiber detector used in the near detector for the K2K (KEK to Kamioka, KEK E362) long baseline neutrino oscillation e…

hep-ex2000★ 24 cited

Direct Measurement of the W Boson Width in ppbar Collisions at roots = 1.8 TeV

CDF Collaboration, T. Affolder

This Letter describes a direct measurement of the boson total decay width, $\gw$, using the Collider Detector at Fermilab. The measurement uses an integrated luminosity of $90\…