Published October 15, 2001
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Journal Article
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Measurement of J/ψ Production in Continuum e^+e^− Annihilations near √s = 10.6 GeV
Abstract
The production of J/ψ mesons in continuum e^+e^− annihilations has been studied with the BABAR detector at energies near the Υ(4S) resonance. The mesons are distinguished from J/ψ production in B decays through their center-of-mass momentum and energy. We measure the cross section e^+e^− → J/ψX to be 2.52±0.21±0.21pb. We set a 90% C.L. upper limit on the branching fraction for direct Υ(4S) → J/ψX decays at 4.7×10^(-4).
Additional Information
© 2001 The American Physical Society. Received 8 June 2001; published 27 September 2001. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (U.S.A.), NSERC (Canada), IHEP (China), CEA and CNRS-IN2P3 (France), BMBF (Germany), INFN (Italy), NFR (Norway), MIST (Russia), and PPARC (United Kingdom). Individuals have received support from the Swiss NSF, A. P. Sloan Foundation, Research Corporation, and Alexander von Humboldt Foundation.Attached Files
Published - PhysRevLett.87.162002.pdf
Files
PhysRevLett.87.162002.pdf
Additional details
Identifiers
- Eprint ID
- 85254
- Resolver ID
- CaltechAUTHORS:20180312-140549714
Funding
- Department of Energy (DOE)
- NSF
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Institute of High Energy Physics (IHEP)
- Commissariat à l'énergie atomique (CEA)
- Centre National de la Recherche Scientifique (CNRS)
- Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
- Bundesministerium für Bildung und Forschung (BMBF)
- Istituto Nazionale di Fisica Nucleare (INFN)
- Research Council of Norway
- MIST (Russia)
- Particle Physics and Astronomy Research Council (PPARC)
- Swiss National Science Foundation (SNSF)
- Alfred P. Sloan Foundation
- Research Corporation
- Alexander von Humboldt Foundation
Dates
- Created
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2018-03-12Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field