Searching for lepton flavor violating decays τ→Pl in the minimal R-symmetric supersymmetric standard model

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2020-12, Vol.80 (12)
• Main Authors: Sun, Ke-Sheng, Guo, Tao, Li, Wei, Yang, Xiu-Yi, Zhao, Shu-Min
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Elementary Particles; Flavor (particle physics); Hadrons; Heavy Ions; Leptons; Mathematical models; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Parameters; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article – Theoretical Physics; String Theory; Supersymmetry
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-020-08750-w

We analyze the lepton flavor violating decays τ → P l ( P = π , η , η ′ ; l = e , μ ) in the scenario of the minimal R-symmetric supersymmetric standard model. The prediction on the branching ratios BR ( τ → P e ) and BR ( τ → P μ ) is affected by the mass insertion parameters δ 13 and δ 23 , respectively. These parameters are constrained by the experimental bounds on the branching ratios BR( τ → e ( μ ) γ ) and BR( τ → 3 e ( μ ) ). The result shows Z penguin dominates the prediction on BR( τ → P l ) in a large region of the parameter space. The branching ratios for BR( τ → P l ) are predicted to be, at least, five orders of magnitude smaller than present experimental bounds and three orders of magnitude smaller than future experimental sensitivities.