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 $B^+ -> \chi_{c0}K^+$

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.

12.39.-x
13.25.Hw
11.30.Er
electron positron: annihilation
B: pair production
asymmetry: CP: measured
B+: rare decay
B+: branching ratio: measured
B+: hadronic decay
final state: (0charm)

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Observation of the rare decay B+−>K+π0π0B^+ -> K^+\pi^0\pi^0B+−>K+π0π0 and measurement of the quasi-two body contributions B+−>K∗(892)+π0B^+ -> K^*(892)^+\pi^0B+−>K∗(892)+π0, B+−>f0(980)K+B^+ -> f_0(980)K^+B+−>f0​(980)K+ and B+−>χc0K+B^+ -> \chi_{c0}K^+B+−>χc0​K+

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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 $B^+ -> \chi_{c0}K^+$