Measurement of J/ψ Production in Continuum e+e Annihilations near s=10.6GeV

B. Aubert et al. (The BABAR Collaboration)
Phys. Rev. Lett. 87, 162002 – Published 27 September 2001
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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+eJ/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 4.7×104.

  • Received 8 June 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.162002

©2001 American Physical Society

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Vol. 87, Iss. 16 — 15 October 2001

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