The nonfactorizable QED correction to the ${\overline{B}}_s$ $\to$ $D_s^{(\ast )}\ell {\bar{\nu }}_{\ell }$ decays

Yueling Yang, Jiazhi Li, Liting Wang +1

Considering the nonfactorizable QED corrections, the branching ratios and ratios of branching ratios $R(D_s^{(\ast )})$ for the semileptonic ${\overline{B}}_s$ $\to$ $D_{s}^{(…