Due to the surplus of electron neutrino led people to suggest the possibility of 4th neutrino flavour, and it is thought to only interact with gravity and nothing else not even weak interaction. So is anti sterile neutrino possible and how can we distinguish them apart? So when muon neutrino and muon anti-neutrino both oscillate into their respective sterile neutrino and sterile anti-neutrino, do they annihilate each other on contact?

Note: I know sterile neutrino is a hypothetical particle so I'm looking for theoretical solution since people have starting to modify the standard model to make some space for them.

  • $\begingroup$ You want to know how the enhanced disappearance of neutrinos into sterile neutrinos differs from the enhanced disappearance of antineutrinos into sterile antineutrinos? Have you read up on the respective PMNS-like mixing matrices? $\endgroup$ – Cosmas Zachos Jan 8 at 3:25
  • $\begingroup$ @CosmasZachos: I just googled it and I hope you can provide some links on PMNS-like mixing matrix especially for intro to intermediate level, thanks. $\endgroup$ – user6760 Jan 8 at 3:41
  • $\begingroup$ Try the links on the right. Or this talk, cgc.physics.miami.edu/Miami2018/Hewes2018.pdf $\endgroup$ – Cosmas Zachos Jan 8 at 3:51

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