Observation of the rare decay B[superscript +]→K[superscript +]π[superscript 0]π[superscript 0] and measurement of the quasi-two-body contributions B[superscript +]→K*(892)[superscript +]π[superscript 0], B[superscript +]→f[subscript 0](980)K[superscript +], and B[superscript +]→χ[subscript c0]K[superscript +]
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Lees-2011-Observation of the rare decay.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Date Issued
November 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
J. P. Lees et al. "Observation of the rare decay B[superscript +]→K[superscript +]π[superscript 0]π[superscript 0] and measurement of the quasi-two-body contributions B[superscript +]→K*(892)[superscript +]π[superscript 0], B[superscript +]→f[subscript 0](980)K[superscript +], and B[superscript +]→χ[subscript c0]K[superscript +]" Physical Review D 84, 092007 (2011). © 2011 American Physical Society
Version
Final published version
Abstract
We report an analysis of charmless hadronic decays of charged B mesons to the final state K[superscript +]π[superscript 0]π[superscript 0], using a data sample of (470.9±2.8)×10[superscript 6] 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[superscript +]→K[superscript +]π[superscript 0]π[superscript 0])=(16.2±1.2±1.5)×10[superscript -6] and A[subscript CP](B[superscript +]→K[superscript +]π[superscript 0]π[superscript 0])=-0.06±0.06±0.04, where the uncertainties are statistical and systematic, respectively. Additionally, we study the contributions of the B[superscript +]→K*(892)[superscript +]π[superscript 0], B[superscript +]→f[superscript 0](980)K[superscript +], and B[superscript +]→χ[subscript c0]K[superscript +] quasi-two-body decays. We report the world’s best measurements of the branching fraction and CP asymmetry of the B[superscript +]→K[superscript +]π[superscript 0]π[superscript 0] and B[superscript +]→K*(892)[superscript +]π[superscript 0] channels.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.84.092007
