SCET sum rules for ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$, $\Lambda \gamma$ decays

Long-Shun Lu, Cai-Dian Lü, Yue-Long Shen +1

We construct light-cone sum rules for various types of effective form factors in the ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ and ${\Lambda }_b\to \Lambda \gamma$ decays by analyzing vacuum-to-${\Lambda }_b$ (or ${\gamma }^{\ast }$-to-$Λ…