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Observation of the rare decay B+->K+pi0pi0 and measurement of the quasi-two-body contributions B+->K*(892)+pi0, B+->f0(980)K+ and B+->chic0K+

Abstract : We report an analysis of the charmless hadronic decays of charged B meson to the final state K+pi0pi0, using a data sample of 470+/-2.8 million BBbar events collected at the Y(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+pi0pi0)=(16.2+/-1.2+/-1.5)x10^-6 and A_CP(B+->K+pi0pi0)=-0.06+/-0.06+/-0.04, where the uncertainties are statistical and systematic respectively. Additionally we study the contributions of the B+->K*(892)+pi0, B+->f0(980)K+ and B+->chic0K+ quasi-two body decays. We report the world's best measurements of the branching fractions and CP asymmetry of the B+->K+pi0pi0 and B+->K*(892)+pi0 channels.
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http://hal.in2p3.fr/in2p3-00626603
Contributor : Swarna Bassava <>
Submitted on : Monday, September 26, 2011 - 3:28:51 PM
Last modification on : Wednesday, September 16, 2020 - 4:19:59 PM

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J.P. Lees, V. Poireau, V. Tisserand, D. Bernard, M. Verderi, et al.. Observation of the rare decay B+->K+pi0pi0 and measurement of the quasi-two-body contributions B+->K*(892)+pi0, B+->f0(980)K+ and B+->chic0K+. Physical Review D, American Physical Society, 2011, 84, pp.092007. ⟨10.1103/PhysRevD.84.092007⟩. ⟨in2p3-00626603⟩

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