Renormalization group evolution induced breaking of μ-τ reflection symmetry in MSSM with effects of variation of tanβ

2025/12/11 by Borah, Chandan Kumar, Duarah, Chandan
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2512.10586

Abstract

We study the renormalization group (RG) evolution induced breaking of μ--τ reflection symmetry in the Minimal Supersymmetric Standard Model (MSSM), with a special focus on the effects of varying tanβ≡ v_u/v_d, the ratio of MSSM Higgs vacuum expectation values. Starting from an exact μ--τ reflection symmetry imposed at a high flavor symmetry scale Λ_FS, we run the complete set of coupled RGEs for neutrino masses, mixing angles, and CP-violating phases down to the electroweak scale, imparting perturbation to the symmetry. We consider a specific value of the SUSY breaking scale, Λ_s=7 TeV during the run. By choosing suitable free parameters at the high-energy scale, we reproduce the low-energy experimental constraints on neutrino observables consistent with 3ν global analysis data. We then examine how the breaking of μ--τ reflection symmetry is influenced by different values of tanβ, considering three benchmark choices. In addition, the analysis is performed for both normal ordering (NO) and inverted ordering (IO) of neutrino masses to highlight potential differences in their RG running behavior.

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