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 / Aubert, B., Boutigny, D., Gaillard, J.M., Hicheur, A., Karyotakis, Y., Lees, J.P., Robbe, P., Tisserand, V., Palano, A., Chen, G.P., Chen, J.C., N. D., Q.i., Rong, G., Wang, P., Zhu, Y.S., Eigen, G., Reinertsen, P.L., Stugu, B., Abbott, B., Abrams, G.S., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 87:(2001), p. 162002. [10.1103/physrevlett.87.162002]

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

CAVOTO, Gianluca;D. d. Re;FACCINI, Riccardo;F. Ferroni;C. Voena;
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).
2001
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of J/psi production in continuum e(+)e(-) annihilations near root s=10.6 GeV / Aubert, B., Boutigny, D., Gaillard, J.M., Hicheur, A., Karyotakis, Y., Lees, J.P., Robbe, P., Tisserand, V., Palano, A., Chen, G.P., Chen, J.C., N. D., Q.i., Rong, G., Wang, P., Zhu, Y.S., Eigen, G., Reinertsen, P.L., Stugu, B., Abbott, B., Abrams, G.S., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 87:(2001), p. 162002. [10.1103/physrevlett.87.162002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/472497
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