QCD factorization for the $B\to {\hat{I}}^3\ell \hat{I}{½}_{\ell }$ decay beyond leading power

Bo-Yan Cui, Yue-Long Shen, Chao Wang +1

The radiative leptonic $B\to {\hat{I}}^3\ell \hat{I}{½}_{\ell }$ decay serves as an ideal platform to determine the $B$-meson inverse moment which is a fundamental nonperturbative parameter for the $…