Quasi-two-body decays $B_{(s)}\to K^{\ast }\gamma \to K\pi \gamma$ in perturbative QCD approach

Zhi-Qing Zhang, Yan-Chao Zhao, Zhi-Lin Guan +3

In this work we study the quasi-two-body decays $B\to K^{\ast }\gamma \to K\pi \gamma$ in the perturbative QCD (PQCD) approach. The two-meson distribution amplitudes (DAs) are introduced to describe t…