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arXiv 2408.07598hep-phastro-ph.CO
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与μ子g-2相关的TeV尺度三重态费米子共振轻子生成

TeV Scale Resonant Leptogenesis with triplet Fermion in Connection to Muon $g-2$

Simran Arora, Devabrat Mahanta, B. C. Chauhan

AI总结:

本研究扩展最小scotogenic模型引入三重态费米子和单态标量,通过Z₄×Z₂对称性实现对角Yukawa耦合,在μ子 sector 经共振轻子生成产生净轻子不对称性,同时解释μ子g-2反常并提供TeV尺度可行参数空间,惰性标量为暗物质候选者。

摘要:

我们提出了一个包含三重态费米子和单态标量的最小scotogenic模型扩展。引入的Z₄×Z₂对称性仅允许标准模型(SM)轻子不同代与右手单态中微子之间存在对角Yukawa耦合。三重态费米子与惰性二重态的Yukawa耦合对μ子反常磁矩有正贡献。该Z₄×Z₂对称性禁止了最轻右手单态中微子衰变产生的常规轻子生成过程。通过共振轻子生成机制,μ子 sector 可从N₂和三重态费米子衰变中产生净轻子不对称性。三重态的Yukawa耦合在轻子生成和μ子反常磁矩中均起重要作用。我们展示了能解释费米实验室结果的TeV尺度轻子生成可行参数空间。惰性标量是该模型中的暗物质候选者。μ子(g-2)和暗物质均偏好暗物质与三重态费米子质量的同一参数空间。

英文摘要:

We propose an extension of the minimal scotogenic model with a triplet fermion and a singlet scalar. An imposed $Z_{4}\times Z_{2}$ symmetry allows only diagonal Yukawa couplings among different generations of SM leptons and right-handed singlet neutrinos. The Yukawa coupling of the triplet fermion with the inert doublet positively contributes to the muon anomalous magnetic moment. The imposed $Z_{4}\times Z_{2}$ symmetry forbids the conventional leptogenesis from the lightest right-handed neutrino decay. A net lepton asymmetry can be generated in the muonic sector from $N_{2}$ and triplet fermion decay through resonant leptogenesis scenario. The Yukawa coupling of triplet plays significant role both in leptogenesis and in the anomalous magnetic moment of the muon. We show a viable parameter space for TeV scale leptogenesis while explaining the Fermi lab results. The inert scalar is the dark matter candidate in this model. The Muon $(g-2)$ and dark matter both favor the same parameter space for mass of the dark matter and the triplet fermion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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