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arXiv 1310.2248hep-phhep-ex
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模拟标准模型希格斯玻色子:不解耦的排列

Impersonating the Standard Model Higgs Boson: Alignment without Decoupling

Marcela Carena, Ian Low, Nausheen R. Shah, Carlos E. M. Wagner

摘要:

在具有扩展希格斯扇区的模型中,存在一个排列极限,在这个极限中,最轻的CP偶希格斯玻色子模仿标准模型希格斯。对准极限通常与退耦极限相关联,其中所有非标准标量都比$Z$玻色子重得多。然而,无论希格斯扇区的其余部分的质量尺度如何,对齐都可以发生。在这项工作中,我们讨论的一般条件,导致“不去耦对齐”,因此允许存在额外的非标准希格斯玻色子在弱尺度。发生这种情况的$\tanβ$的值是根据一般的双希格斯模型以及超对称理论(包括MSSM和NMSSM)中的有效希格斯四次耦合导出的。此外,我们还研究了SM希格斯-费米子耦合的变化中编码的信息,以探索$m_A - \tanβ$参数空间中的区域。

英文摘要:

In models with an extended Higgs sector there exists an alignment limit, in which the lightest CP-even Higgs boson mimics the Standard Model Higgs. The alignment limit is commonly associated with the decoupling limit, where all non-standard scalars are significantly heavier than the $Z$ boson. However, alignment can occur irrespective of the mass scale of the rest of the Higgs sector. In this work we discuss the general conditions that lead to "alignment without decoupling", therefore allowing for the existence of additional non-standard Higgs bosons at the weak scale. The values of $\tanβ$ for which this happens are derived in terms of the effective Higgs quartic couplings in general two-Higgs-doublet models as well as in supersymmetric theories, including the MSSM and the NMSSM. Moreover, we study the information encoded in the variations of the SM Higgs-fermion couplings to explore regions in the $m_A - \tanβ$ parameter space.

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