Leading large $N_c$ contributions to Lepton Number Violating Meson Decays

Andrea Donini, Marcela González, Martin Hirsch +1

Lepton number violating meson decays, such as $M_1^{-}\to M_2^{+}{\ell }_1^{-}{\ell }_2^{-}$, provide constraints on $d=9$ $\Delta L=2$ operators. RGE-improved bounds on the Wilson coefficients of…