First Observation of Bs0J/ψη and Bs0J/ψη

J. Li et al. (Belle Collaboration)
Phys. Rev. Lett. 108, 181808 – Published 3 May 2012

Abstract

We report first observations of Bs0J/ψη and Bs0J/ψη. The results are obtained from 121.4fb1 of data collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e collider. We obtain the branching fractions B(Bs0J/ψη)=[5.10±0.50(stat)±0.25(syst)0.79+1.14(NBs(*)B¯s(*))]×104, and B(Bs0J/ψη)=[3.71±0.61(stat)±0.18(syst)0.57+0.83(NBs(*)B¯s(*))]×104. The ratio of the two branching fractions is measured to be B(BsJ/ψη)B(BsJ/ψη)=0.73±0.14(stat)±0.02(syst).

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  • Received 31 January 2012

DOI:https://doi.org/10.1103/PhysRevLett.108.181808

© 2012 American Physical Society

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Vol. 108, Iss. 18 — 4 May 2012

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