Lepton-flavor violation and two loop electroweak corrections to (g−2)μ in the triplets next-to-minimal MSSM

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-10-14 DOI:10.1103/x7sb-n9lw

Zhao-Yang Zhang

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引用次数: 0

Abstract

In the Standard Model (SM), charged lepton flavor-violating (LFV) processes are strictly forbidden, and thus observation of LFV would signal the presence of new physics. Recently, the Muon g−2 Collaboration at Fermilab reported their final result for the muon magnetic dipole moment (MDM), which is now consistent with the latest SM prediction at the 1σ level. This imposes a significant constraint on new-physics contributions to (g−2)μ. In this work, we study the LFV processes ℓj−→ℓi−γ and ℓj−→ℓi−ℓi−ℓi+ within the framework of the triplet next-to-minimal supersymmetric standard model (TNMSSM). We include two-loop contributions to the muon MDM and investigate the resulting constraints on the model parameter space. Our numerical analysis shows that, in the TNMSSM, doubly charged Higgs bosons and the couplings YL and YD associated with the type-I+II seesaw mechanism play a crucial role in both LFV processes and the muon MDM. Moreover, two-loop electroweak corrections have a significant impact on the muon MDM in this framework.

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次最小三态MSSM中的轻子味违反和对(g−2)μ的两回电弱修正

在标准模型（SM）中，带电轻子风味破坏（LFV）过程是严格禁止的，因此观察到LFV将标志着新物理学的存在。最近，费米实验室的μ子g−2合作小组报告了他们对μ子磁偶极矩（MDM）的最终结果，该结果现在与最新的1σ水平的SM预测一致。这对(g−2)μ的新物理贡献施加了重要的限制。本文在三重态次极小超对称标准模型（TNMSSM）的框架内研究了LFV过程，即lj−→li−γ和lj−→li−li +。我们包括对μ子MDM的双环贡献，并研究由此产生的模型参数空间约束。我们的数值分析表明，在TNMSSM中，双荷电希格斯玻色子以及与i +II型跷跷板机制相关的YL和YD耦合在LFV过程和μ子MDM中都起着至关重要的作用。此外，双环电弱修正对该框架下的μ子MDM有显著影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.