Measurements of time-dependent CP violation in B{sup 0}{yields}{psi}(2S)K{sub S}{sup 0} decays
- University of Hawaii, Honolulu, Hawaii 96822 (United States)
- High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
We report improved measurements of time-dependent CP violation parameters for B{sup 0}(B{sup 0}){yields}{psi}(2S)K{sub S}{sup 0}. This analysis is based on a data sample of 657x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the Belle detector at the KEKB energy-asymmetric e{sup +}e{sup -} collider. We fully reconstruct one neutral B meson in the {psi}(2S)K{sub S}{sup 0} CP-eigenstate decay channel, and the flavor of the accompanying B meson is identified to be either B{sup 0} or B{sup 0} from its decay products. CP violation parameters are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays: S{sub {psi}}{sub (2S)K{sub S{sup 0}}=+0.72{+-}0.09(stat){+-}0.03(syst), A{sub {psi}}{sub (2S)}K{sub S{sup 0}}=+0.04{+-}0.07(stat){+-}0.05(syst). These results are in agreement with results from measurements of B{sup 0}{yields}J/{psi}K{sup 0}.
- OSTI ID:
- 21250082
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 9; Other Information: DOI: 10.1103/PhysRevD.77.091103; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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