O. Bardon

Massachusetts Institute of Technology

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R. J. Wilson

Rush University Medical Center

J. Quigley

Massachusetts Institute of Technology

J. A. Coller

London School of Hygiene & Tropical Medicine

G. Watts

University of Manchester

M. Nussbaum

University of Cincinnati

FŠ

F. Šforza

Istituto Nazionale di Fisica Nucleare, Sezione di Genova

S. González

Université Paris-Saclay

R. Steiner

Adelphi University

I. Karliner

University of Illinois Urbana-Champaign

R. Cotton

Shirley Ryan AbilityLab

Cooperative Institutions

Institute of High Energy Physics

606

SLAC National Accelerator Laboratory

428

Stanford University

379

Stanford Synchrotron Radiation Lightsource

331

Fermi National Accelerator Laboratory

330

European Organization for Nuclear Research

311

Centre National de la Recherche Scientifique

252

Institut National de Physique Nucléaire et de Physique des Particules

239

Adelphi University

221

A. Alikhanyan National Laboratory

220

Author Statistics

Papers

Citation

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Measurement ofRbUsing a Vertex Mass Tag

Physical Review Letters (1998)

K. Abe K. Abe T. Akagi N. J. Allen W. W. Ash

We report a new measurement of Rb = Gamma(Z0->b-bbar) / Gamma(Z0->hadrons) using a double tag technique, where the b hemisphere selection is based on the reconstructed mass of the B hadron decay vertex. The measurement was performed using a sample of 130k hadronic Z0 events, collected with the SLD at the SLC. The method utilizes the 3-D vertexing abilities of the CCD pixel vertex detector and the small stable SLC beams to obtain a high b-tagging efficiency and purity. We obtain Rb=0.2142+/-0.0034(stat.)+/-0.0015(syst.)+/-0.0002(R_c).

10.1103/physrevlett.80.660

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Citations (54)

A preliminary, precise measurement of the average B hadron lifetime

K. Abe Y. Hasegawa A. Yu. Tolstykh J. Va’vra B. Camanzi

Source

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Citations (0)

Measurement of alpha-s from hadronic event observables at the Z0 resonance

Presented at (1994)

K. Abe S. Williams H. Hwang R. Cotton R.K. Yamamoto

Alpha (finance)

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Citations (1)

Measurement of the Mass of the τ Lepton

J. Z. Bai O. Bardon R. Becker-Szendy T. H. Burnett J. S. Campbell

10.1142/9789811217739_0024

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Improved Measurement of the Left-Right {ital Z}{sup 0} Cross Section Asymmetry

Physical Review Letters (1997)

R. Steiner A. C. Benvenuti J. A. Coller S. Hedges A. S. Johnson

We present a new measurement of the left-right cross section asymmetry (A{sub LR}) for Z boson production by e{sup +}e{sup -} collisions. The measurement was performed at a center-of-mass energy of 91.28GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (77.23{plus_minus}0.52){percent}. Using a sample of 93644 Z decays, we measure the pole value of the asymmetry, A{sup 0}{sub LR}, to be 0.1512{plus_minus}0.0042(stat){plus_minus}0.00 11(syst), which is equivalent to an effective weak mixing angle of sin{sup 2}{theta}{sup eff}{sub W}=0.23100{plus_minus}0.00054(stat) {plus_minus}0.00014(syst). {copyright} {ital 1997} {ital The American Physical Society}

Electron–positron annihilation

Pair production

Weinberg angle

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Factorial and cumulant moments in e+e− → hadrons at the Z0 resonance

Physics Letters B (1996)

K. Abe I. Abt C. J. Ahn T. Akagi N. J. Allen

Cumulant

Multiplicity (mathematics)

Factorial

Electron–positron annihilation

10.1016/0370-2693(96)00046-9

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Citations (31)

Measurement of the probability for gluon splitting into b anti-b in Z0 decays

arXiv (Cornell University) (1999)

Kenji Abe P. Jacques H. Hwang T. W. Reeves R. K. Yamamoto

We present a preliminary measurement of the rate of gluon splitting into bottom quarks, g -> b bbar, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavour. 4-jet events were identified, and a topological vertex-mass technique was applied to each jet in order to identify b or bbar jets. The upgraded CCD based vertex detector gives very high B-tagging efficiency, especially for B hadrons of the low energies typical of this process. The two most nearly collinear b/bbar jets were tagged as originating from g -> b bbar. We measured the rate of secondary b/bbar production per hadronic event, g_bb, to be (3.07+-0.71(stat.)+-0.66(syst.)) * 10**-3.

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Citations (3)

Search for a vector glueball by a scan of theJψresonance

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields (1996)

J. Z. Bai O. Bardon I. Blum A. Breakstone T. H. Burnett

The cross section for e+e−→ρπ has been measured by the BES detector at BEPC at center-of-mass energies covering a 40 MeV interval spanning the Jψ resonance. The data are used to search for the vector gluonium state hypothesized by Brodsky, Lepage, and Tuan as an explanation of the ρπ puzzle in charmonium physics. The shape of the ρπ cross section is compatible with that of the total hadronic cross section. No distortions indicating the presence of a vector glueball are seen.Received 19 October 1995DOI:https://doi.org/10.1103/PhysRevD.54.1221©1996 American Physical Society

Glueball

10.1103/physrevd.54.1221

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Citations (26)

Production of [Formula Presented] [Formula Presented] [Formula Presented] [Formula Presented] [Formula Presented] [Formula Presented] and [Formula Presented] in hadronic [Formula Presented] decays

Hiroshima University Acedemic Information Repository (Hiroshima University) (1999)

K. Abe K. Abe И. Адам T. Akagi N. J. Allen

d'Alembert's formula

Liouville's formula

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Citations (54)

Direct Measurement of the Pseudoscalar Decay Constant,fDs

Physical Review Letters (1995)

J. Z. Bai O. Bardon I. Blum A. Breakstone T. H. Burnett

The Beijing Spectrometer (BES) experiment has observed purely leptonic decays of the ${D}_{s}$ meson in the reaction ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}_{s}^{+}{D}_{s}^{\ensuremath{-}}$ at a c.m. energy of 4.03 GeV. Three events are observed in which one ${D}_{s}$ decays hadronically to $\ensuremath{\varphi}\ensuremath{\pi}$, ${\overline{K}}^{*0}K$, or ${\overline{K}}^{0}K$, and the other decays leptonically to $\ensuremath{\mu}{\ensuremath{\nu}}_{\ensuremath{\mu}}$ or $\ensuremath{\tau}{\ensuremath{\nu}}_{\ensuremath{\tau}}$. With the assumption of $\ensuremath{\mu}\ensuremath{-}\ensuremath{\tau}$ universality, values of the branching fraction, $B({D}_{s}\ensuremath{\rightarrow}\ensuremath{\mu}{\ensuremath{\nu}}_{\ensuremath{\mu}})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}({1.5}_{\ensuremath{-}0.6\ensuremath{-}0.2}^{+1.3+0.3})%$, and the ${D}_{s}$ pseudoscalar decay constant, ${f}_{{D}_{s}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}({4.3}_{\ensuremath{-}1.3\ensuremath{-}0.4}^{+1.5+0.4})\ifmmode\times\else\texttimes\fi{}{10}^{2}$ MeV, are obtained.

Branching fraction

10.1103/physrevlett.74.4599

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Citations (36)