QCD factorization of the four-lepton decay $B^{-}\to \ell {\bar{\nu }}_{\ell }{\ell }^{(\prime )}{\bar{\ell }}^{(\prime )}$

Martin Beneke, Philipp Böer, Panagiotis Rigatos +1

Motivated by the first search for the rare charged-current $B$ decay to four leptons, $\ell {\bar{\nu }}_{\ell }{\ell }^{(\prime )}{\bar{\ell }}^{(\prime )}$, we calculate the decay amplitude with…