Measurement of J/psi Production in Continuum e{sup +}e{sup -} Annihilations Near sqrt(s) = 10.6 GeV
- SLAC
The production of J/{psi} mesons in continuum e{sup +}e{sup -} annihilations has been studied with the BABAR detector at energies near the {Upsilon}(4S) resonance, approximately 10.6 GeV. The mesons are distinguished from J/{psi} production in B decays through their center-of-mass momentum and energy. We measure the cross section e{sup +}e{sup -} {yields} J/{psi} X to be 2.52 {+-} 0.21 {+-} 0.21 pb; for momentum above 2 GeV/c, it is 1.87 {+-} 0.10 {+-} 0.15 pb. We set a 90% confidence level upper limit on the branching fraction for direct {Upsilon}(4S) {yields} J/{psi} X decays at 4.3 x 10{sup -4}.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515;
- OSTI ID:
- 787185
- Report Number(s):
- SLAC-PUB-8854
- Country of Publication:
- United States
- Language:
- English
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