$W$ radiative decay to heavy-light mesons in HQET factorization through $\mathcal{O}({\alpha }_s)$

Saadi Ishaq, Yu Jia, Xiaonu Xiong +1

Analogous to NRQCD factorization for heavy quarkonium exclusive production, in this work we propose to employ the heavy-quark-effective-theory (HQET) factorization, which has been…