arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1705.01469hep-ph
收藏

μ子特异性双Higgs二重态模型

Muon specific two-Higgs-doublet model

Tomohiro Abe, Ryosuke Sato, Kei Yagyu

摘要:

我们研究了一种新型的双Higgs二重态模型作为μ子$g-2$反常的解。我们施加一个软破$Z_4$对称禁止树级风味改变中性电流在一个自然的方式。这种$Z_4$对称性限制了Yukawa耦合的结构。结果,额外的希格斯玻色子与μ子的耦合被增强了$\tanβ$的因子,而它们与所有其他标准模型费米子的耦合被$\cotβ$抑制。由于这种耦合性质,我们可以避免来自轻子$τ$衰变的约束,而轻子特异性的两个Higgs双重态模型可以在2 $σ$水平内解释μ子$g-2$,但由于这种约束,不能在$1σ$水平内解释μ子。我们发现,该模型可以解释μ子$g-2$在1 $σ$水平满足微扰么正性,真空稳定性,电弱精密测量,和当前的LHC数据的约束。

英文摘要:

We investigate a new type of a two-Higgs-doublet model as a solution of the muon $g-2$ anomaly. We impose a softly-broken $Z_4$ symmetry to forbid tree level flavor changing neutral currents in a natural way. This $Z_4$ symmetry restricts the structure of Yukawa couplings. As a result, extra Higgs boson couplings to muons are enhanced by a factor of $\tanβ$, while their couplings to all the other standard model fermions are suppressed by $\cotβ$. Thanks to this coupling property, we can avoid the constraint from leptonic $τ$ decays in contrast to the lepton specific two-Higgs-doublet model, which can explain the muon $g-2$ within the 2$σ$ level but cannot within the $1σ$ level due to this constraint. We find that the model can explain the muon $g-2$ within the 1$σ$ level satisfying constraints from perturbative unitarity, vacuum stability, electroweak precision measurements, and current LHC data.

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。

↑