Journal article

Time-dependent Dalitz plot measurement of CP parameters in B-0 -> K-S(0)pi( )pi(-) decays

J Dalseno, I Adachi, H Aihara, K Arinstein, T Aushev, AM Bakich, V Balagura, A Bay, V Bhardwaj, U Bitenc, A Bondar, A Bozek, M Bracko, TE Browder, Y Chao, A Chen, BG Cheon, I-S Cho, Y Choi, M Dash Show all

Physical Review D | AMER PHYSICAL SOC | Published : 2009

Abstract

We present a time-dependent Dalitz plot measurement of CP violation parameters in B0→KS0π+π- decays. These results are obtained from a large data sample that contains 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. For the CP violation parameters, we obtain two consistent solutions that describe the data well. The first of these solutions may be preferred by external information from other measurements. There is no evidence for direct CP violation in B0→ρ0(770)KS0, B0→f0(980)KS0 and B0→K*+(892)π-, while measurements of mixing-induced CP violation in B0→ρ0(770)KS0 and B0→f0(980)KS0 decays are consistent with that of b→cc̄..

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These effects can be taken into account with a time-dependent Dalitz plot fit. In addition, the interference terms in some cases may be sensitive to the cosine of the effective weak phase difference (~ eff 1) in mixing, potentially resolving the two-fold ambiguity in ~eff 1 characteristic.