Complete lattice QCD calculation of $K^{-}\to {\ell }^{-}{\bar{\nu }}_{\ell }{\ell }^{{}^{\prime }+}{\ell }^{{}^{\prime }-}$ form factors

R. Di Palma, R. Frezzotti, G. Gagliardi +6

We present the first complete lattice QCD calculation of the four structure-dependent form factors governing the rare charged kaon decay $K^{-}\to {\ell }^{-}{\bar{\nu }}_{\ell }{\ell }^{\prime +}{\ell }^{\prime -}$…