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arXiv 2103.05645hep-ph
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两个含类矢量轻子的Higgs二重态模型中的μ子$g-2$

Muon $g-2$ in two Higgs doublet models with vectorlike leptons

Radovan Dermisek, Keith Hermanek, Navin McGinnis

摘要:

在两个由矢量轻子扩展的Higgs二重态模型中计算了重中性和带电希格斯玻色子玻色子和新轻子对μ子反常磁矩的贡献。我们提出了两个模型的详细预测与II型耦合标准模型费米子,由$Z_2$对称性和超对称性的动机。此外,我们还将所得结果与类矢量轻子推广的标准模型进行了比较。我们发现,模型的动机由$Z_{2}$对称性可以产生更大的贡献的磁矩相比,标准模型,甚至由两个数量级,由于$\tan^{2}β$增强,同时满足电流约束。因此,标准模型解释的异常需要更大的修正μ子耦合,使这个模型更容易在未来的精密机器探测。此外,我们发现,超对称性激发的耦合模型通常会导致更小的贡献异常作为取消的结果。然而,我们发现有趣的情况下,从带电的希格斯玻色子的贡献可以完全解释的异常。

英文摘要:

We calculate contributions to the anomalous magnetic moment of the muon from heavy neutral and charged Higgs bosons and new leptons in two Higgs doublet models extended by vectorlike leptons. We present detailed predictions of two models with type-II couplings to standard model fermions, motivated by a $Z_2$ symmetry and supersymmetry. In addition, we compare the results with the standard model extended by vectorlike leptons. We find that the model motivated by a $Z_{2}$ symmetry can generate much larger contributions to the magnetic moment compared to the standard model, even by two orders of magnitude due to $\tan^{2}β$ enhancement, while satisfying current constraints. As a consequence, the standard model explanation of the anomaly requires much larger corrections to muon couplings making this model easier to probe at future precision machines. Additionally, we find that the model with couplings motivated by supersymmetry typically leads to much smaller contributions to the anomaly as a result of cancellations. However, we identify interesting scenarios where contributions from the charged Higgs boson can fully explain the anomaly.

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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