Low-energy lepton physics in the MRSSM: ( g - 2) μ , μ→ eγ and μ→ e conversion

Low-energy lepton observables are discussed in the Minimal R-symmetric Supersymmetric Standard Model. We present comprehensive numerical analyses and the analytic one-loop results for (g − 2)μ, μ → eγ, and μ → e conversion. The interplay between the three observables is investigated as well as the parameter regions with large g − 2. A striking difference to the MSSM is the absence of tanβ enhancements; however we find smaller enhancements governed by MRSSM-specific R-Higgsino couplings λd and Λd. As a result we find significant contributions to g − 2 only in a small parameter space with several SUSY masses below 200 GeV, compressed spectra and large λd, Λd. In this parameter space there is a correlation between all three considered observables. In the parameter region with small (g − 2)μ the SUSY masses can be larger and the correlation between μ → eγ and μ → e conversion is weak. Therefore already COMET Phase 1 has a promising sensitivity to the MRSSM.