In a 3+1 model with eV-scale sterile neutrino, cosmological bounds on sum of neutrino masses restrict sterile mixing angle θ14 and lightest active neutrino mass for vanishing |M_ee|, while JUNO precision on θ12 adds little constraint due to extra CP phase cancellations.
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Phenomenology of Vanishing Effective Majorana Mass with a Sterile Neutrino under Cosmological and JUNO Constraints
In a 3+1 model with eV-scale sterile neutrino, cosmological bounds on sum of neutrino masses restrict sterile mixing angle θ14 and lightest active neutrino mass for vanishing |M_ee|, while JUNO precision on θ12 adds little constraint due to extra CP phase cancellations.