Authentic Majorana versus singlet Dirac neutrino contributions to ${\mu }^{+}{\mu }^{+}\to {\ell }^{+}{\ell }^{+}$ $(\ell =e,\tau )$ transitions

Jorge Luis Gutiérrez Santiago, G. Hernández-Tomé, Diego Portillo-Sánchez +1

We revisited the computation of the cross section for the ${\mu }^{+}{\mu }^{+}\to {\ell }^{+}{\ell }^{+}$ $({\ell }^{+}={\tau }^{+},e^{+})$ transitions in the presence of new heavy Majorana neutrinos. We focus on…