Measurement of Time-Dependent CP-Violating Parameters in B{sup 0}{yields}K{sub S}{sup 0}K{sub S}{sup 0} Decays

Journal Article · Fri Mar 28 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.121601· OSTI ID:21123777

Nakahama, Y; Aihara, H; Iwasaki, M ^[1]; Sumisawa, K; Adachi, I; Haba, J; Hazumi, M; Itoh, R; Iwasaki, Y; Katayama, N; Kichimi, H; Krokovny, P; Nakao, M; Nishida, S; Nozaki, T; Ozaki, H; Sakai, Y; Tajima, O; Takasaki, F; Tanaka, M ^[2]

---

1. Department of Physics, University of Tokyo, Tokyo (Japan)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

We report a measurement of the CP-violating parameters in B{sup 0}{yields}K{sub S}{sup 0}K{sub S}{sup 0} decays based on a data sample of 657x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. In this Letter, one neutral B meson is fully reconstructed in the B{sup 0}{yields}K{sub S}{sup 0}K{sub S}{sup 0} decay mode, and the flavor of the accompanying B meson is identified by its decay products. The CP-violating parameters are measured from the asymmetry in the distributions of the proper-time interval between the two B decays: S{sub K{sub S}{sup 0}}{sub K{sub S}{sup 0}}=-0.38{sub -0.77}{sup +0.69}(stat){+-}0.09(syst) and A{sub K{sub S}{sup 0}}{sub K{sub S}{sup 0}}=-0.38{+-}0.38(stat){+-}0.05(syst)

• OSTI ID: 21123777
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
CP INVARIANCE
FLAVOR MODEL
KAONS NEUTRAL SHORT-LIVED
PAIR PRODUCTION
PARTICLE DECAY
TIME DEPENDENCE