One loop correction to $Z\rightarrow νν$ in the Minimal R-symmetric Supersymmetric Standard Model

Ke-Sheng Sun; Jian-Bin Chen; Xiu-Yi Yang; Hai-Bin Zhang

doi:10.1142/S0217732319500585

paper

One loop correction to $Z \to ν ν$ in the Minimal R-symmetric Supersymmetric Standard Model

arXiv:1901.03806 · doi:10.1142/S0217732319500585

Abstract

We analyze the one loop correction to $Z \to ν ν$ 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 parameterize the mass matrices. The numerical results indicate that the branching ratio for $Z \to ν ν$ 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 $B r (Z \to ν ν)$ increases proportionally to $tan β$ and inversely proportionally to $m_{l}$ . For normal neutrino mass ordering, the peak value of the prediction on $B r (Z \to ν ν)$ exceeds the SM expectation at $1 σ$ level.

14 pages, 5 figures, to be published in MPLA. arXiv admin note: text overlap with arXiv:1901.03800

One loop correction to Z→νν in the Minimal R-symmetric Supersymmetric Standard Model

Abstract

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One loop correction to $Z \to ν ν$ in the Minimal R-symmetric Supersymmetric Standard Model