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arXiv 0904.1622hep-phhep-th
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小higgs模型夸克区中隐藏的微调

Hidden fine tuning in the quark sector of little higgs models

Benjamín Grinstein, Randall Kelley, Patipan Uttayarat

摘要:

在小希格斯模型中,集体对称性阻止了希格斯在一个环上获得二次发散的质量。通过首先考虑最小希格斯模型,我们表明这需要一个微调:在模型中引入的耦合给顶夸克一个质量,并不自然地尊重集体对称性。我们表明,这个问题是通用的:它源于这样一个事实,即任何一个顶夸克质量项的集体对称性被打破的规范相互作用。

英文摘要:

In little higgs models a collective symmetry prevents the higgs from acquiring a quadratically divergent mass at one loop. By considering first the littlest higgs model we show that this requires a fine tuning: the couplings in the model introduced to give the top quark a mass do not naturally respect the collective symmetry. We show the problem is generic: it arises from the fact that the would be collective symmetry of any one top quark mass term is broken by gauge interactions.

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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