We report an analysis of charmless hadronic decays of charged B mesons to the final state K+ pi(0)pi(0), using a data sample of (470.9 +/- 2.8) x 10(6) B (B) over bar events collected with the BABAR detector 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+ pi(0)pi(0)) = (16.2 +/- 1.2 +/- 1.5) x 10(-6) and A(CP)(B+ -> K+ pi(0)pi(0)) = -0.06 +/- 0.06 +/- 0.04, where the uncertainties are statistical and systematic, respectively. Additionally, we study the contributions of the B+ -> K*(892)(+) pi(0), B+ -> f(0)(980)K+, and B+ -> chi K-c0(+) quasi-two-body decays. We report the world's best measurements of the branching fraction and CP asymmetry of the B+ -> K+ pi(0)pi(0) and B+ -> K+(892)(+) pi(0) channels.

Observation of the rare decay B+ -> K+ pi(0)pi(0) and measurement of the quasi-two-body contributions B+ -> K* (892)(+) pi(0), B+ -> f(0)(980)K+, and B+ -> chi K-c0(+) / J. P., L., V., P., V., T., J. G., T., E., G., M., M., D. A., M., A., P., M., P., G., E., B., S., D. N., B., L. T., K., Y. G., K., G., L., H., K., T., S., D. J., A., C., H., T. S., M., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 84:9(2011), p. 092007. [10.1103/PhysRevD.84.092007]

Observation of the rare decay B+ -> K+ pi(0)pi(0) and measurement of the quasi-two-body contributions B+ -> K* (892)(+) pi(0), B+ -> f(0)(980)K+, and B+ -> chi K-c0(+)

CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;
2011

Abstract

We report an analysis of charmless hadronic decays of charged B mesons to the final state K+ pi(0)pi(0), using a data sample of (470.9 +/- 2.8) x 10(6) B (B) over bar events collected with the BABAR detector 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+ pi(0)pi(0)) = (16.2 +/- 1.2 +/- 1.5) x 10(-6) and A(CP)(B+ -> K+ pi(0)pi(0)) = -0.06 +/- 0.06 +/- 0.04, where the uncertainties are statistical and systematic, respectively. Additionally, we study the contributions of the B+ -> K*(892)(+) pi(0), B+ -> f(0)(980)K+, and B+ -> chi K-c0(+) quasi-two-body decays. We report the world's best measurements of the branching fraction and CP asymmetry of the B+ -> K+ pi(0)pi(0) and B+ -> K+(892)(+) pi(0) channels.
2011
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the rare decay B+ -> K+ pi(0)pi(0) and measurement of the quasi-two-body contributions B+ -> K* (892)(+) pi(0), B+ -> f(0)(980)K+, and B+ -> chi K-c0(+) / J. P., L., V., P., V., T., J. G., T., E., G., M., M., D. A., M., A., P., M., P., G., E., B., S., D. N., B., L. T., K., Y. G., K., G., L., H., K., T., S., D. J., A., C., H., T. S., M., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 84:9(2011), p. 092007. [10.1103/PhysRevD.84.092007]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/440266
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