Lepton flavor violation and scotogenic Majorana neutrino mass in a Stueckelberg U(1)X model

Journal of High Energy Physics

Regular Article - Theoretical Physics

Takaaki Nomura¹  Chun-Wei Su²  Chuan-Hung Chen³  Cheng-Wei Chiang⁴ 

[1] College of Physics, Sichuan University, 610065, Chengdu, China;Department of Physics and Center for Theoretical Physics, National Taiwan University, 10617, Taipei, Taiwan;Department of Physics, National Cheng-Kung University, 70101, Tainan, Taiwan;Physics Division, National Center for Theoretical Sciences, 10617, Taipei, Taiwan;Physics Division, National Center for Theoretical Sciences, 10617, Taipei, Taiwan;Department of Physics and Center for Theoretical Physics, National Taiwan University, 10617, Taipei, Taiwan;

关键词: Lepton Flavour Violation (charged);    Models for Dark Matter;    Neutrino Mixing;    New Gauge Interactions;   

DOI  :  10.1007/JHEP09(2022)166

 received in 2022-02-04, accepted in 2022-09-07,  发布年份 2022

来源: Springer

【 摘 要 】

We construct a scotogenic Majorana neutrino mass model in a gauged U(1)X extension of the standard model, where the mass of the gauge boson and the unbroken gauge symmetry, which leads to a stable dark matter (DM), can be achieved through the Stueckelberg mechanism. It is found that the simplest version of the extended model consists of the two inert-Higgs doublets and one vector-like singlet fermion. In addition to the Majorana neutrino mass, we study the lepton flavor violation (LFV) processes, such as ℓi → ℓjγ, ℓi → 3ℓj, μ − e conversion rate in nucleus, and muonium-antimuonium oscillation. We show that the sensitivities of μ → 3e and μ − e conversion rate designed in Mu3e and COMET/Mu2e experiments make both decays the most severe constraints on the μ → e LFV processes. It is found that τ → μγ and τ → 3μ can reach the designed significance level of Belle II. In addition to explaining the DM relic density, we also show that the DM-nucleon scattering cross section can satisfy the currently experimental limit of DM direct detection.

【 授权许可】

Unknown   
© The Author(s) 2022

【 图 表 】

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