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arXiv 1105.5403hep-ph
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另一个自然双希格斯双重模型

The Other Natural Two Higgs Doublet Model

Jan Mrazek, Alex Pomarol, Riccardo Rattazzi, Michele Redi, Javi Serra, Andrea Wulzer

摘要:

我们表征模型,其中电弱对称性破缺是由两个轻希格斯双重产生的伪Nambu-Goldstone玻色子的弱尺度以上的新动力学。它们代表了超对称性的最简单的自然的两个希格斯双重态。我们构造他们的低能量有效拉格朗日只做一些具体的假设强部门。这些问题涉及到它们的全局对称性、自发破缺的模式和外显破缺的来源。特别地,我们假设所有的显式破缺都与强扇区到标准模型场的耦合有关,即规范场和(原)汤川相互作用。在这些假设下,标量势在最低阶由与顶部扇区相关联的非常少的自由参数确定。我们的方案的另一个重要性质是存在一个离散对称性,除了保管SO(4),控制$T$参数。它可以是简单的CP,也可以是区分两个希格斯二重态的$Z_2$。在各种可能性中,我们详细研究了基于SO(6)/SO(4)$\times$ SO(2)的模型,重点是它们对标量谱结构的预测以及它们与一般可重整化的双Higgs模型的耦合偏差。

英文摘要:

We characterize models where electroweak symmetry breaking is driven by two light Higgs doublets arising as pseudo-Nambu-Goldstone bosons of new dynamics above the weak scale. They represent the simplest natural two Higgs doublet alternative to supersymmetry. We construct their low-energy effective Lagrangian making only few specific assumptions about the strong sector. These concern their global symmetries, their patterns of spontaneous breaking and the sources of explicit breaking. In particular we assume that all the explicit breaking is associated with the couplings of the strong sector to the Standard Model fields, that is gauge and (proto)-Yukawa interactions. Under those assumptions the scalar potential is determined at lowest order by very few free parameters associated to the top sector. Another crucial property of our scenarios is the presence of a discrete symmetry, in addition to custodial SO(4), that controls the $T$-parameter. That can either be simple CP or a $Z_2$ that distinguishes the two Higgs doublets. Among various possibilities we study in detail models based on SO(6)/SO(4)$\times$ SO(2), focussing on their predictions for the structure of the scalar spectrum and the deviations of their couplings from those of a generic renormalizable two Higgs doublet model.

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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