Soft photon corrections in $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and ${\Lambda }_b\to {\Lambda }^{(\ast )}{\ell }^{+}{\ell }^{-}$ decays

Debajyoti Choudhury, Diganta Das, Jaydeb Das

We calculate QED corrections to the semileptonic decays $H_1\to H_2{\ell }^{+}{\ell }^{-}$ where $\ell =e,\mu$ and $H_{1,2}$ are hadrons. The soft and/or collinear divergences are regulated i…