Measurement of J/psi production in continuum e(+)e(-) annihilations near square root of s = 10.6 GeV.

Journal article

The production of J/psi mesons in continuum e(+)e(-) annihilations has been studied with the BABAR detector at energies near the Upsilon(4S) resonance. 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(+)e(-)-->J/psi X to be 2.52+/-0.21+/-0.21 pb. We set a 90% C.L. upper limit on the branching fraction for direct Upsilon(4S)-->J/psi X decays at 4.7 x 10(-4).

Authors: Aubert, B; Boutigny, D; Gaillard, J; Hicheur, A; Karyotakis, Y

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 87
• Issue: 16
• Pages: 162002
• Publication date: 2001-10-01
• DOI: 10.1103/physrevlett.87.162002
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: BABAR Collaboration