Measurement of the CP Asymmetry and Branching Fraction of B^0 to rho^0 K^0

Details Measurement of the CP Asymmetry and Branching Fraction of B^0 to rho^0 K^0 Measurement of the CP Asymmetry and Branching Fraction of B^0 to rho^0 K^0

2006-08-18

arxiv.org/abs/hep-ex/0608051v1

Phys.Rev.Lett.98:051803,2007

Physics

High Energy Physics

High Energy Physics - Experiment

submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.98.051803

We present a measurement of the branching fraction and time-dependent CP asymmetry of B^0 to rho^0 K^0. The results are obtained from a data sample of 227 10^6 Y4S to BB_ decays collected with the BaBar detector at the PEP2 asymmetric-energy B Factory at SLAC. From a time-dependent maximum likelihood fit yielding 111+/-19 signal events we find B(B^0 to rho^0 K^0)=(4.9+/-0.8+/-0.9) 10^-6, where the first error is statistical and the second systematic. We report the measurement of the CP parameters S=0.20+/-0.52+/-0.24 and C=0.64+/-0.41+/-0.20.

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