Journal article
Measurement of exclusive Υ(1S) and Υ(2S) decays into vector-pseudoscalar final states
CP Shen, CZ Yuan, I Adachi, H Aihara, DM Asner, V Aulchenko, AM Bakich, A Bala, B Bhuyan, M Bischofberger, A Bozek, M Bračko, TE Browder, V Chekelian, A Chen, P Chen, BG Cheon, K Chilikin, IS Cho, K Cho Show all
Physical Review D Particles Fields Gravitation and Cosmology | Published : 2013
Abstract
Using samples of 102 million Υ(1S) and 158 million Υ(2S) events collected with the Belle detector, we study exclusive hadronic decays of these two bottomonium resonances to KS0K+π- and charge-conjugate (c.c.) states, π+π-π0π0, and π+π-π0, and to the two-body Vector-Pseudoscalar (K*(892)0K̄0+c.c., K*(892)-K ++c.c., ωπ0, and ρπ) final states. For the first time, signals are observed in the modes Υ(1S)→KS0K+π -+c.c., π+π-π0π0, and Υ(2S)→π+π-π0π0, and evidence is found for the modes Υ(1S)→π+π-π0, K*(892)0K̄0+c.c., and Υ(2S)→KS0K +π-+c.c. Branching fractions are measured for all the processes, while 90% confidence level upper limits on the branching fractions are also set for the modes with a sta..
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Awarded by Japan Society for the Promotion of Science
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, the NII, and PNNL/EMSL for valuable computing and SINET4 network support. We acknowledge support from MEXT, JSPS and Nagoya's TLPRC (Japan); ARC and DIISR (Australia); FWF (Austria); NSFC (China); MSMT (Czechia); CZF, DFG, and VS (Germany); DST (India); INFN (Italy); MEST, NRF, GSDC of KISTI, and WCU (Korea); MNiSW and NCN (Poland); MES and RFAAE (Russia); ARRS (Slovenia); IKERBASQUE and UPV/EHU (Spain); SNSF (Switzerland); NSC and MOE (Taiwan); and DOE and NSF (USA).