Current constraints on μ-τ SMEFT four-lepton operators exclude heavy-mediator UV completions of strong neutrino self-interactions in the dimension-six SMEFT without tuned cancellations, while leaving light-mediator scenarios open.
Updated constraints on massive neutrino self- interactions from cosmology in light of theH 0 tension
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Theoretical and Experimental Constraints in the $\mu$--$\tau$ Four-Lepton Sector of the SMEFT: implications to neutrino self interactions
Current constraints on μ-τ SMEFT four-lepton operators exclude heavy-mediator UV completions of strong neutrino self-interactions in the dimension-six SMEFT without tuned cancellations, while leaving light-mediator scenarios open.