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

Measurement of J/psi production in continuum e(+)e(-) annihilations near root s=10.6 GeV RID A-8798-2012 RID C-2728-2008 RID A-2675-2009 RID C-5223-2009 RID F-2602-2010 RID C-5719-2008 RID A-8865-2012 RID D-1189-2011 RID E-8846-2011

LUSIANI, Alberto;
2001

Abstract

The production of J/psi mesons in continuum e(+)e(-) annihilations has been studied with the BABAR detector at energies near the Y(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/psiX to be 2.52 +/- 0.21 +/- 0.21 pb. We set a 90% C.L. upper limit on the branching fraction for direct Y(4S) --> J/psiX decays at 4.7 x 10(-4).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/4756
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