Journal article
First observation of Bs0→J/ψη and Bs0→J/ψη′
J Li, I Adachi, H Aihara, K Arinstein, DM Asner, V Aulchenko, T Aushev, AM Bakich, V Bhardwaj, B Bhuyan, M Bischofberger, A Bondar, A Bozek, M Bračko, O Brovchenko, TE Browder, MC Chang, A Chen, P Chen, BG Cheon Show all
Physical Review Letters | Published : 2012
Abstract
We report first observations of Bs0→J/ψη and Bs0→J/ψη′. The results are obtained from 121.4fb-1 of data collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e- collider. We obtain the branching fractions B(Bs0→J/ψη)=[5.10±0.50(stat)±0. 25(syst)-0.79+1.14(NBs(*)B̄s(*))]×10 -4, and B(Bs0→J/ψη′)=[3.71±0. 61(stat)±0.18(syst)-0.57+0.83(NBs(*)B̄s(*))] ×10-4. The ratio of the two branching fractions is measured to be B(Bs→J/ψη′)B(Bs→J/ ψη)=0.73±0.14(stat)±0.02(syst). © 2012 American Physical Society.
Grants
Awarded by WCU
Funding Acknowledgements
We thank the KEKB group for excellent operation of the accelerator, the KEK cryogenics group for efficient solenoid operations, and the KEK computer group and the NII for valuable computing and SINET4 network support. We acknowledge support from MEXT, JSPS and Nagoya's TLPRC (Japan); ARC and DIISR (Australia); NSFC (China); MSMT (Czechia); DST (India); INFN (Italy); MEST, NRF, NSDC of KISTI, and WCU (Korea); MNiSW (Poland); MES and RFAAE (Russia); ARRS (Slovenia); SNSF (Switzerland); NSC and MOE (Taiwan); and DOE and NSF (U.S.). J. Li acknowledges support from WCU Grant No. R32-10155.