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.

Observation of the rare decay B^{+}→K^{+}π^{0}π^{0} and measurement of the quasi-two-body contributions B^{+}→K*(892)^{+}π^{0}, B^{+}→f_{0}(980)K^{+}, and B^{+}→χ_{c0}K^{+} / J., L., V., P., V., T., J., G.T., E., G., M., M., D., M., A., P., M., P., G., E., B., S., D., B., L., K., Kolomensky, Y.u., G., L., H., K., T., S., D., A., C., H., T., M., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 84:(2011), pp. 092007-1-092007-11. [10.1103/PhysRevD.84.092007]

Observation of the rare decay B^{+}→K^{+}π^{0}π^{0} and measurement of the quasi-two-body contributions B^{+}→K*(892)^{+}π^{0}, B^{+}→f_{0}(980)K^{+}, and B^{+}→χ_{c0}K^{+}

LANCERI, LIVIO;VITALE, LORENZO;
2011-01-01

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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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2567022
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