We report first observations of Bs0?J/?? and Bs0?J/??'. The results are obtained from 121.4??fb-1 of data collected at the ?(5S) resonance with the Belle detector at the KEKB e+e- collider. We obtain the branching fractions B(Bs0?J/??)=[5.10±0.50(stat)±0.25(syst)-0.79+1.14(NBs(*)B¯ s(*))]×10-4, and B(Bs0?J/??')=[3.71±0.61(stat)±0.18(syst)-0.57+0.83(NBs(*)B¯ s(*))]×10-4. The ratio of the two branching fractions is measured to be B(Bs?J/??')/B(Bs?J/??)=0.73±0.14(stat)±0.02(syst).
Revised: August 30, 2016 |
Published: May 3, 2012
Citation
Li J., I. Adachi, H. Aihara, K. Arinstein, D.M. Asner, V. Aulchenko, and T. Aushev, et al. 2012.First observations of Bs0 ? J/?? and Bs0 ? J/??'.Physical Review Letters 108, no. 18:Article No. 181808.PNNL-SA-88328.doi:10.1103/PhysRevLett.108.181808