We present a measurement of the partial branching fractions and mass spectra of the exclusive radiative penguin processes B→Kππγ in the range mKππ<1.8 GeV/c2. We reconstruct four final states: K+π-π+γ, K+π-π0γ, KS0π-π+γ, and KS0π+π0γ, where KS0→π+π-. Using 232×10^6 e+e-→BB̅ events recorded by the BABAR experiment at the SLAC PEP-II asymmetric-energy storage ring, we measure the branching fractions B(B+→K+π-π+γ)=[2.95±0.13(stat)±0.20(syst)]×10-5, B(B0→K+π-π0γ)=[4.07±0.22(stat)±0.31(syst)]×10-5, B(B0→K0π+π-γ)=[1.85±0.21(stat)±0.12(syst)]×10-5, and B(B+→K0π+π0γ)=[4.56±0.42(stat)±0.31(syst)]×10-5.
Measurement of Branching Fractions and Mass Spectra of B→Kππγ
SIMI, GABRIELE;MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;
2007
Abstract
We present a measurement of the partial branching fractions and mass spectra of the exclusive radiative penguin processes B→Kππγ in the range mKππ<1.8 GeV/c2. We reconstruct four final states: K+π-π+γ, K+π-π0γ, KS0π-π+γ, and KS0π+π0γ, where KS0→π+π-. Using 232×10^6 e+e-→BB̅ events recorded by the BABAR experiment at the SLAC PEP-II asymmetric-energy storage ring, we measure the branching fractions B(B+→K+π-π+γ)=[2.95±0.13(stat)±0.20(syst)]×10-5, B(B0→K+π-π0γ)=[4.07±0.22(stat)±0.31(syst)]×10-5, B(B0→K0π+π-γ)=[1.85±0.21(stat)±0.12(syst)]×10-5, and B(B+→K0π+π0γ)=[4.56±0.42(stat)±0.31(syst)]×10-5.File in questo prodotto:
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