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arXiv 1407.2145hep-ph
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两个Higgs二重态情景的高尺度有效性:包括LHC数据的研究

High-scale validity of a two-Higgs doublet scenario: a study including LHC data

Nabarun Chakrabarty, Ujjal Kumar Dey, Biswarup Mukhopadhyaya

摘要:

我们认为,在高能量尺度下的两个希格斯偶极子模型的有效性的条件,连同所有其他低能量和高能量的限制。在低能量的参数空间上的约束,包括希格斯质量的测量值和信道中的信号强度并列与真空稳定性,微扰性和幺正性在各种尺度上的条件。我们发现,一个确切的$\mathbb{Z}_2$对称性的潜力的情况下,不能有效超过约10 TeV的额外的物理干预。另一方面,当$\mathbb{Z}_2$对称性被打破时,即使没有任何新的物理学引入,这个理论也可以在普朗克尺度下有效。我们指出的有趣的特点是,这种高尺度的有效性是无关的顶夸克质量以及$α_{s}(M_Z)$的不确定性,与标准模型与一个单一的希格斯偶。它还表明,CP违反相位的存在是允许的时,$\mathbb{Z}_2$对称性放松。在参数空间中的允许的区域中的每一种情况下。结果在第二类情景的背景下进行了说明。

英文摘要:

We consider the conditions for the validity of a two-Higgs doublet model at high energy scales, together with all other low- and high-energy constraints. The constraints on the parameter space at low energy, including the measured value of the Higgs mass and the signal strengths in channels are juxtaposed with the conditions of vacuum stability, perturbativity and unitarity at various scales. We find that a scenario with an exact $\mathbb{Z}_2$ symmetry in the potential cannot be valid beyond about 10 TeV without the intervention of additional physics. On the other hand, when the $\mathbb{Z}_2$ symmetry is broken, the theory can be valid even up to the Planck scale without any new physics coming in. The interesting feature we point out is that such high-scale validity is irrespective of the uncertainty in the top quark mass as well as $α_{s}(M_Z)$, in contrast with the standard model with a single Higgs doublet. It is also shown that the presence of a CP-violating phase is allowed when the $\mathbb{Z}_2$ symmetry is relaxed. The allowed regions in the parameter space are presented for each case. The results are illustrated in the context of a Type-II scenario.

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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