New Measurements of Time-Dependent CP-Violating Asymmetries in B0 -> KsKsKs and Ks pi0 gamma Decays at Belle

2004/11/17 by K. Abe, Abe, K.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.hep-ex/0411056

openalex publication_date 2004/11/17 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

We present new measurements of CP-violation parameters in B0 -> KsKsKs and Ks pi0 gamma decays based on a sample of 275 x 10⁶ BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified 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. We obtain S_KsKsKs = +1.26 +/- 0.68(stat) +/- 0.18(syst), A_KsKsKs = +0.54 +/- 0.34(stat) +/- 0.08(syst), S_{Ks pi0 gamma} = -0.58 +0.46/-0.38(stat) +/- 0.11(syst), A_{Ks pi0 gamma} = +0.03 +/- 0.34(stat) +/- 0.11(syst). All results are preliminary.

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