Measurement of Branching Fractions and Mass Spectra in B → Kππγ Decays

• Main Author: Samuel, Alexander
• Format: Others
• Published: 2006
• Online Access: https://thesis.library.caltech.edu/2243/1/thesis.pdf; Samuel, Alexander (2006) Measurement of Branching Fractions and Mass Spectra in B → Kππγ Decays. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/JNY6-XG69. https://resolver.caltech.edu/CaltechETD:etd-05292006-225405 <https://resolver.caltech.edu/CaltechETD:etd-05292006-225405>

We present a measurement of the branching fractions of the exclusive radiative penguin processes B to K pi pi gamma in a sample of 232 million e+ e- to B Bbar decays recorded by the BaBar detector at the PEP-II asymmetric-energy storage ring. We reconstruct four final states: K+ pi- pi+, K+ pi- pi0, Ks pi+ pi-, and Ks pi+ pi0, where Ks to pi+ pi-, in the range m(K pi pi) < 1.8 GeV/c^2. We measure the branching fractions BR(B+ to K+ pi- pi+ gamma) = (2.95 +- 0.13 (stat.) +- 0.19 (syst.)) x 10^-5, BR(B0 to K+ pi- pi0 gamma) = (4.07 +- 0.22 (stat.) +- 0.31 (syst.)) x 10^-5, BR(B0 to K0 pi+ pi- gamma) = (1.85 +- 0.21 (stat.) +- 0.12 (syst.)) x 10^-5, and BR(B+ to K0 pi+ pi0 gamma) = (4.56 +- 0.42 (stat.) +- 0.30 (syst.)) x 10^-5.