Lepton Flavor Violating Tau Decays in The Constrained MSSM-Seesaw Model

Authors : Vael Hajahmad, Mahmoud Albari, Ali Ercan Ekinci

Pages : 842-857

View : 36 | Download : 95

Publication Date : 2025-12-31

Article Type : Research Paper

Abstract :Abstract The flavor violation of leptons may occur in specific particle interactions, a phenomenon referred to as lepton flavor violation (LFV). Within the Standard Model of particle physics (SM), lepton flavors are predicted to be strictly conserved. Thus, any observed violations could provide significant insights into physics beyond the Standard Model (BSM). This research focuses on examining LFV in tau decays to one electron and two muons, specifically within the framework of supersymmetric models (SUSY), such as the Constrained Minimal Supersymmetric (CMSSM) models extended by the Seesaw Type-I mechanism. The CMSSM model integrates right-handed neutrino fields and the seesaw mechanism to offer explanations for phenomena including neutrino masses [1]. The primary objective is to conduct a phenomenological analysis of LFV in tau decays in these channels: τ^- ⟶ e^- e^+ e^-, τ^- ⟶ μ^- μ^+ μ^-, τ^- ⟶ e^- μ^+ μ^-, τ^- ⟶ μ^- e^+ e^-, τ^- ⟶ e^+ μ^- μ^-, τ^- ⟶ μ^+ e^- e^- .These channels are crucial for exploring the interplay between LFV, the seesaw mechanism, and supersymmetry. All are characterized by a zero hypercharge (Y=0), conforming to the gauge symmetry SU (3) _C × SU (2) _L × U (1) _Y as (1, 3, 0). This expansion utilizes the seesaw mechanism to facilitate the exploration of neutrino mass eigenstates, suggesting a New Physics scale on the order of ~10^14 GeV. We meticulously calibrated the parameters using the latest experimental constraints on the masses of sleptons, charginos, neutralinos, and sneutrinos. The grand unification scale (M_GUT) is fixed at 2×1016 GeV, and the supersymmetry breaking scale (M_susy) is set at 103 GeV.
Keywords : Lepton lezzet ihlali, Seesaw Mekanizma, Süpersimetri

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