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arXiv 1409.8115hep-ph
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$SU(4) \otimes U(1)_N$模型中的μ子反常磁矩

Muon Anomalous Magnetic Moment in a $SU(4) \otimes U(1)_N$ Model

D. Cogollo

摘要:

研究了基于规范对称性$SU(4)_L\otimes U(1)_N$的电弱模型中的μ子反常磁矩,该模型的谱中有右手中微子,在树能级上没有变味中性流。我们讨论了该模型的相关碰撞和电弱约束,并基于对μ子磁矩的修正,导出了对称性破缺尺度的最严格上界。我们的结论是对称性破缺的规模约为2 TeV可能解释的μ子磁矩异常。如果异常以其他方式解决,使用g-2实验的电流和投影灵敏度,我们排除了在$1σ$水平上小于3.5TeV(5.5TeV)的对称性破缺尺度。

英文摘要:

We study the muon anomalous magnetic moment in an electroweak model based on the gauge symmetry $SU(4)_L\otimes U(1)_N$, which has right-handed neutrinos in its spectrum, and no flavor changing neutral currents at tree level. We discuss relevant collider and electroweak constraints on the model, and derive the most stringent upper bounds on the scale of symmetry breaking based on the corrections to the muon magnetic moment. We conclude that a scale of symmetry breaking of around 2TeV might explain the muon magnetic moment anomaly. In case the anomaly is otherwise resolved, using the current and projected sensitive of g-2 experiments, we rule out scales of symmetry breaking smaller than 3.5TeV (5.5TeV) at $1σ$ level.

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