Searches for heavy neutrinos at multi-TeV muon collider : a resonant leptogenesis perspective

Abstract

In this work, the standard model (SM) is extended with two right-handed (RH) neutrinos and two singlet neutral fermions to yield active neutrino masses via (2,2) inverse see-saw mechanism. We first validate the multi-dimensional model parameter space with neutrino oscillation data, obeying the experimental bounds coming from the lepton flavor violating (LFV) decays: $\mu \to e\gamma ,\tau \to e\gamma ,\tau \to \mu \gamma$. Besides we also search for the portion of the parameter space which yield the observed baryon asymmetry of the universe via resonant leptogenesis. Further, we pick up a few benchmark points from the aforementioned parameter space with TeV scale heavy neutrinos and perform an exhaustive collider analysis of the final states: $2l + \mET$ in multi-TeV muon collider.

29 pages, 5 tables, 6 captioned figures

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• Long-lived Sterile Neutrino Searches at Future Muon Colliders