One-loop correction to Z→νν in the minimal R-symmetric supersymmetric Standard Model.

We analyze the one-loop correction to Z → ν ν decay in framework of Minimal R-symmetric Supersymmetric Standard Model (MRSSM) in detail with normal and inverse neutrino mass orderings, as a function of tan β , Dirac mass parameters M D W and μ u (μ d) , slepton mass m l that parametrize the mass matrices. The numerical results indicate that the branching ratio for Z → ν ν decay is compatible with the experimental measurement and the SM expectation at 2 σ level. For inverse neutrino mass ordering, the prediction exceeds the SM expectation at 1 σ level. The prediction on Br (Z → ν ν) increases proportionally to tan β and inversely proportionally to m l . For normal neutrino mass ordering, the peak value of the prediction on Br (Z → ν ν) exceeds the SM expectation at 1 σ level. [ABSTRACT FROM AUTHOR]