Study of B → Kππγ decays at the BaBar experiment

Abstract

The preliminary results obtained from the analysis of the B meson radiative decays to Kππγ, recorded at the BaBar experiment, are presented. A preliminary measurement of the time-dependent CP asymmetry related to the hadronic CP eigenstate ρ0KS0 is extracted from the radiative-penguin decay B0→KS0π+π−γ. The decay B+→K+π+π−γ is used to measure the intermediate resonant amplitudes of different resonances decaying to Kππ through the intermediate states ρ0K+, K⁎0π+ and (Kπ)S−waveπ+. Assuming (isospin symmetry) that the resonant amplitudes are the same for B0→KS0π+π−γ, the time-dependent CP asymmetry of the B0→KS0ργ decay is obtained.