Measurement of Inclusive Ds, D0, and J/ψ Rates and Determination of the Bs(*)B¯s(*) Production Fraction in bb¯ Events at the Υ(5S) Resonance

A. Drutskoy et al. (Belle Collaboration)
Phys. Rev. Lett. 98, 052001 – Published 29 January 2007

Abstract

The inclusive production of Ds, D0, and J/ψ mesons is studied using a 1.86fb1 data sample collected on the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e collider. The number of bb¯ events in this Υ(5S) data sample is determined. We measure the branching fractions B(Υ(5S)DsX)/2=(23.6±1.2±3.6)%, B(Υ(5S)D0X)/2=(53.8±2.0±3.4)%, and B(Υ(5S)J/ψX)/2=(1.030±0.080±0.067)%. From the Ds and D0 inclusive branching fractions the ratio fs=(18.0±1.3±3.2)% of Bs(*)B¯s(*) to the total bb¯ quark pair production at the Υ(5S) energy is obtained in a model-dependent way.

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  • Received 16 October 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.052001

©2007 American Physical Society

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Vol. 98, Iss. 5 — 2 February 2007

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