Determining the photon polarization of the radiative B->K1(1270) gamma decay
Presented by Mr. Andrey TAYDUGANOV
Track: 06 - CP violation, CKM and Rare Decays
Recently the radiative B decay to the strange axial-vector mesons, B-> K1(1270) gamma, was observed. This process is particularly interesting as the subsequent K1 decay into its three body final state allows us to determine the polarization of the gamma, which is mostly left- (right-) handed for Bbar (B) in the SM while various new physics models predict additional right- (left-)handed components. In order to obtain a theoretical prediction for this polarization measurement, it is important to understand the hadronic uncertainties for this decay channel. We first revisit the strong decays of the K1 mesons, namely the partial wave amplitudes as well as their relative phases, in the framework of the 3P0 quark-pair-creation model. Then, we present our result on the sensitivity of the B-> K1(1270) gamma process to the photon polarization.