arXiv 1502.073402015-02hep-ph

动力学复合希格斯粒子

The Dynamical Composite Higgs

Gero von Gersdorff, Eduardo Ponton, Rogerio Rosenfeld

备注：: 32 pages plus appendices, 7 figures - reference added
发表信息：: JHEP 06 (2015) 119

摘要：

我们提出了一个简单的微观实现的伪南布-戈德斯通（pNGB）玻色子希格斯的情况下所产生的$SO(5) \rightarrow SO(4)$打破。希格斯成分被明确确定，以及负责形成束缚态和打破电弱对称性的相互作用。这一结果来自于超临界耦合的四费米子相互作用的存在，并使用Nambu-Jona-Lasinio机制来打破全球$SO(5)$对称性。由于存在一个近似的红外不动点，Higgs势对高能尺度不敏感。描述了矢量共振的出现，并与文献中的其他建议建立了对应关系。这里描述的模型比其他最近的紫外线完成pNGB场景要简单得多。观测到的希格斯质量可以容纳，并与电弱精度测试在某些区域的参数空间达成协议。也有新的矢量类费米子，其中一些可能在LHC的范围内。此外，我们预测一个沉重的标准模型单重标量在多TeV的范围。在模型中所需的微调量进行了研究。最后，我们表明，这样的计划可以完成在紫外线的重整化理论。

英文摘要：

We present a simple microscopic realization of a pseudo-Nambu-Goldstone (pNGB) boson Higgs scenario arising from the breaking of $SO(5) \rightarrow SO(4)$. The Higgs constituents are explicitly identified as well as the interactions responsible for forming the bound state and breaking the electroweak symmetry. This outcome follows from the presence of four-fermion interactions with a super-critical coupling, and uses the Nambu-Jona-Lasinio mechanism to break the global $SO(5)$ symmetry. The Higgs potential is found to be insensitive to high energy scales due to the existence of an approximate infrared fixed point. The appearance of vector resonances is described and the correspondence with other proposals in the literature established. The model described here is significantly simpler than other recent ultraviolet completions of pNGB scenarios. The observed Higgs mass can be accommodated, and agreement with electroweak precision tests achieved in certain regions of parameter space. There are also new vector-like fermions, some of which may lie within reach of the LHC. In addition, we predict a heavy standard model singlet scalar in the multi-TeV range. The amount of fine-tuning required in the model is studied. Finally, we show that such a scheme can be completed in the ultraviolet by a renormalizable theory.

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