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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+


BABAR Collection; Lees, J P; Poireau, V; Tisserand, V; Snoek, H; et al (2011). 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+. Physical Review D (Particles, Fields, Gravitation and Cosmology), 84(9):092007.

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 BB̅ 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)×10-6 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.

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 BB̅ 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)×10-6 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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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2011
Deposited On:14 Mar 2013 07:57
Last Modified:05 Apr 2016 16:36
Publisher:American Physical Society
ISSN:1550-2368
Publisher DOI:https://doi.org/10.1103/PhysRevD.84.092007

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