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Authentic Majorana versus singlet Dirac neutrino contributions to $\mu^{+}\mu^{+}\to \ell^{+}\ell^{+}$ $(\ell=e,\tau)$ transitions
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abstract
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 scenarios where the masses of the new states are around some few TeV, the so-called low-scale seesaw models. Our analysis is set in a simple model with only two new heavy Majorana neutrinos considering the current limits on the heavy-light mixings. Our results illustrate the difference between the genuine effects of two nondegenerate heavy Majorana states and the degenerate case where they form a Dirac singlet field.
Forward citations
Cited by 2 Pith papers
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Probing Lepton Number Violation at Same-Sign Lepton Colliders
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