Observation of the rare decay B+K+π0π0 and measurement of the quasi-two-body contributions B+K*(892)+π0, B+f0(980)K+, and B+χc0K+

J. P. Lees et al. (BABAR Collaboration)
Phys. Rev. D 84, 092007 – Published 29 November 2011

Abstract

We report an analysis of charmless hadronic decays of charged B mesons to the final state K+π0π0, using a data sample of (470.9±2.8)×106 BB¯ events collected with the BABAR detector at the Υ(4S) resonance. We observe an excess of signal events, with a significance above 10 standard deviations including systematic uncertainties, and measure the branching fraction and CP asymmetry to be B(B+K+π0π0)=(16.2±1.2±1.5)×106 and ACP(B+K+π0π0)=0.06±0.06±0.04, where the uncertainties are statistical and systematic, respectively. Additionally, we study the contributions of the B+K*(892)+π0, B+f0(980)K+, and B+χc0K+ quasi-two-body decays. We report the world’s best measurements of the branching fraction and CP asymmetry of the B+K+π0π0 and B+K*(892)+π0 channels.

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  • Received 3 September 2011

DOI:https://doi.org/10.1103/PhysRevD.84.092007

© 2011 American Physical Society

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Vol. 84, Iss. 9 — 1 November 2011

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