Measurement of branching fractions and mass spectra of B -> K pi pi gamma

Details Measurement of branching fractions and mass spectra of B -> K pi pi gamma Measurement of branching fractions and mass spectra of B -> K pi pi gamma

2005-07-07

arxiv.org/abs/hep-ex/0507031v2

Phys.Rev.Lett.98:211804,2007; Erratum-ibid.100:189903,2008; Erratum-ibid.100:199905,2008

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 2 postscript figures, published in Physical Review Letters v98, 211804; Report-no: BABAR-PUB-05/31, SLAC-PUB-11288, i

Scientific paper

10.1103/PhysRevLett.100.189903

We present a measurement of the partial branching fractions and mass spectra of the exclusive radiative penguin processes B -> K pi pi gamma in the range m_Kpipi < 1.8 GeV/c^2. We reconstruct four final states: K+ pi- pi+ gamma, K+ pi- pi0 gamma, Ks pi- pi+ gamma, and Ks pi+ pi- gamma, where Ks -> pi+ pi-. Using 232 million e+ e- -> B Bbar events recorded by the BaBar experiment at the PEP-II asymmetric-energy storage ring, we measure the branching fractions BR(B+ -> K+ pi- pi+ gamma) = (2.95 +- 0.13 (stat.) +- 0.20 (syst.)) x 10^-5, BR(B0 -> K+ pi- pi0 gamma) = (4.07 +- 0.22 (stat.) +- 0.31 (syst.)) x 10^-5, BR(B0 -> K0 pi+ pi- gamma) = (1.85 +- 0.21 (stat.) +- 0.12 (syst.)) x 10^-5, and BR(B+ -> K0 pi+ pi0 gamma) = (4.56 +- 0.42 (stat.) +- 0.31 (syst.)) x 10^-5.

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