Muon g-2 in a U(1)-symmetric two-Higgs-doublet model
Muon g-2 in a U(1)-symmetric two-Higgs-doublet model
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U(1) 对称双希格斯双峰模型中的 Muon g-2
DOI：
10.1103/physrevd.99.035010
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发表时间：
2019
影响因子：
5
通讯作者：
Yang Ya Dong
中科院分区：
文献类型：
--
作者：
Li Shao Ping;Li Xin Qiang;Yang Ya Dong
本文证明，在非对称双Higgs偶线模型中，在理论和实验的共同约束下，两个额外的中性Higgs玻色子在大区域中将趋于简并.因此，在所考虑的框架中无法解决在μ子的异常磁矩中观察到的过量，遵循通常的论点，即这两个中性标量需要表现出大的质量等级。另一方面，我们发现，与antop-Yukawa耦合和一个相对较轻的荷电希格斯玻色子，大的贡献，从两个回路Barr-Zee型图可以解释的μ子异常在thelevel，尽管一个大的标量和赝标量之间的贡献抵消。此外，同样的情况下，可以生存的严格约束，从物理观测。
We show in this paper that, in a-symmetric two-Higgs-doublet model, the two additional neutral Higgs bosons would become nearly degenerate in the largeregime, under the combined constraints from both theoretical arguments and experimental measurements. As a consequence, the excess observed in the anomalous magnetic moment of the muon could not be addressed in the considered framework, following the usual argument where these two neutral scalars are required to manifest a large mass hierarchy. On the other hand, we find that, with antop-Yukawa coupling and a relatively light charged Higgs boson, large contributions from the two-loop Barr-Zee-type diagrams can account for the muonanomaly at thelevel, in spite of a large cancellation between the scalar and pseudoscalar contributions. Furthermore, the same scenario can survive the tight constraints from the-physics observables.