Journal article
Observation of the doubly cabibbo-suppressed decay Ds →K K π-
BR Ko, E Won, H Aihara, K Arinstein, T Aushev, AM Bakich, V Balagura, E Barberio, A Bondar, A Bozek, M Bračko, J Brodzicka, TE Browder, A Chen, BG Cheon, IS Cho, Y Choi, A Drutskoy, W Dungel, S Eidelman Show all
Physical Review Letters | AMER PHYSICAL SOC | Published : 2009
Abstract
We report the first observation of the doubly Cabibbo-suppressed decay Ds+→K+K+π- using 605fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching ratio with respect to its Cabibbo-favored counterpart B(Ds+→K+K+π-)/B(Ds+→K+K-π+) is (0.229±0.028±0.012)%, where the first uncertainty is statistical and the second is systematic. We also report a significantly improved measurement of the doubly Cabibbo-suppressed decay D+→K+π+π-, with a branching ratio B(D+→K+π+π-)/B(D+→K-π+π+)=(0.569±0. 018±0.014)%. © 2009 The American Physical Society.
Grants
Funding Acknowledgements
We thank the KEKB group for operation of the accelerator, the KEK cryogenics group for solenoid operations, and the KEK computer group and the NII for valuable computing and SINET3 network support. We acknowledge support from MEXT, JSPS, and Nagoya's TLPRC (Japan); ARC and DIISR (Australia); NSFC (China); DST (India); MOEHRD and KOSEF (Korea); MNiSW (Poland); MES and RFAAE (Russia); ARRS (Slovenia); SNSF (Switzerland); NSC and MOE (Taiwan); and DOE (U.S.A.).