The production of J/Psi in B meson decays has been measured on the Y(4S) resonance using the Crystal Ball detector at the e+e- storage ring DORIS II. The J/Psi is identified by its e+e- decay mode. We obtain a branching ratio of BR(B->J/Psi X)=(1.12+-0.33+-0.25)% in good agreement with theoretical predictions based on color suppression. The J/Psi momentum distribution is observed to be peaked at high values. This implies a substantial contribution from direct B meson decays to the J/Psi. In addition upper limits on J/Psi production in Y(1S) and Y(2S) decays and in continuum processes are determined.
Inclusive J/Psi production in decays of B mesons / W., Maschmann; D., Antreasyan; H. W., Bartels; D., Besset; Bieler, C. h.; J. K., Bienlein; Bizzeti, Andrea; E. D., Bloom; I., Brock; K., Brockmüller. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 46:(1990), pp. 555-562. [10.1007/BF01560256]
Inclusive J/Psi production in decays of B mesons
BIZZETI, Andrea;
1990
Abstract
The production of J/Psi in B meson decays has been measured on the Y(4S) resonance using the Crystal Ball detector at the e+e- storage ring DORIS II. The J/Psi is identified by its e+e- decay mode. We obtain a branching ratio of BR(B->J/Psi X)=(1.12+-0.33+-0.25)% in good agreement with theoretical predictions based on color suppression. The J/Psi momentum distribution is observed to be peaked at high values. This implies a substantial contribution from direct B meson decays to the J/Psi. In addition upper limits on J/Psi production in Y(1S) and Y(2S) decays and in continuum processes are determined.
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