arXiv 1102.40092011-02-19hep-ph

强电弱对称破缺

Strong Electroweak Symmetry Breaking

Benjamin Grinstein

备注：: Talk given at the XXIInd Rencontres de Blois, Loire, France, 16-20 July 2010

摘要：

由强相互作用引起的电弱对称性自发破缺模型不存在微调/层次问题。它们在概念上是优雅的，并且使用了自然界中唯一已知的规范对称性自发破缺的机制。最简单的模型，具有扩展的人工色相互作用的最小人工色模型，是有吸引力的，因为人们可以通过从QCD按比例放大来计算。但它被排除在许多计数：不适当的低夸克和轻子质量（或过度FCNC），弱电数据拟合差，轻标量和矢量状态，等等，然而，自然可能不会选择极小模型，然后我们被卡住了：除了可能通过晶格模拟，我们无法计算和测试的模型。因此，在大型强子对撞机时代，放弃特定的模型（强烈的EW破坏）并专注于可能表明发现的一般特征是有意义的。Technicolor Straw Man不是一个模型，而是一个参数化的搜索策略，灵感来自于行走的Technicolor的一个显着的通用特征，即technivector介子轻，窄，容易衰变为电弱矢量介子和光子。虽然行走的彩色是受欢迎的从业者，替代品存在，稻草人可能不会导致他们的发现。

英文摘要：

Models of spontaneous breaking of electroweak symmetry by a strong interaction do not have fine tuning/hierarchy problem. They are conceptually elegant and use the only mechanism of spontaneous breaking of a gauge symmetry that is known to occur in nature. The simplest model, minimal technicolor with extended technicolor interactions, is appealing because one can calculate by scaling up from QCD. But it is ruled out on many counts: inappropriately low quark and lepton masses (or excessive FCNC), bad electroweak data fits, light scalar and vector states, etc. However, nature may not choose the minimal model and then we are stuck: except possibly through lattice simulations, we are unable to compute and test the models. In the LHC era it therefore makes sense to abandon specific models (of strong EW breaking) and concentrate on generic features that may indicate discovery. The Technicolor Straw Man is not a model but a parametrized search strategy inspired by a remarkable generic feature of walking technicolor, that technivector mesons are light, narrow and decay readily into electroweak vector mesons and photons. While walking technicolor is popular among practitioners, alternatives exist and the Straw Man may not lead to their discovery.

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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英文摘要：

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