Measurement of CP Asymmetry in B0 to Ks pi0 pi0 Decays

Details Measurement of CP Asymmetry in B0 to Ks pi0 pi0 Decays Measurement of CP Asymmetry in B0 to Ks pi0 pi0 Decays

2007-02-05

arxiv.org/abs/hep-ex/0702010v1

Phys.Rev.D76:071101,2007

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 6 figures, submitted to Phys. Rev. D (Rapid Communications)

Scientific paper

10.1103/PhysRevD.76.071101

We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state Ks pi0 pi0, with Ks -> pi+ pi-. We use a sample of approximately 227 million B-meson pairs recorded at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-Factory at SLAC. From an unbinned maximum likelihood fit we extract the mixing-induced CP-violation parameter S = 0.72 +/- 0.71 +/- 0.08 and the direct CP-violation parameter C = 0.23 +/- 0.52 +/- 0.13, where the first uncertainty is statistical and the second systematic.

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