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arXiv 1003.4779hep-ph
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最小Higgs粒子中的自发CP破坏和轻粒子

Spontaneous CP Violation and Light Particles in The Littlest Higgs

Ze'ev Surujon, Patipan Uttayarat

摘要:

小希格斯模型通常具有自发破缺的额外全局对称性,这些对称性也必须被明确破缺,以避免光谱中的无质量戈德斯通模式。我们表明,一个可能的冲突与集体对称性破缺,然后意味着光模式耦合到希格斯玻色子,导致有趣的现象。此外,自发的CP破坏在这种情况下是相当普遍的,因为显式破缺可以用来稳定真空中的物理CP奇相。我们在最小希格斯粒子的SU(2)\times SU(2)\times U(1)变体以及原始SU(6)/SO(6)模型中证明了这一点。我们发现,即使是一个非常小的明确的突破可能会导致大的阶段,导致在这类模型的新的来源的CP破坏。

英文摘要:

Little Higgs models often feature spontaneously broken extra global symmetries, which must also be explicitly broken in order to avoid massless Goldstone modes in the spectrum. We show that a possible conflict with collective symmetry breaking then implies light modes coupled to the Higgs boson, leading to interesting phenomenology. Moreover, spontaneous CP violation is quite generic in such cases, as the explicit breaking may be used to stabilize physical CP odd phases in the vacuum. We demonstrate this in an SU(2) \times SU(2) \times U(1) variant of the Littlest Higgs, as well as in an original SU(6)/SO(6) model. We show that even a very small explicit breaking may lead to large phases, resulting in new sources of CP violation in this class of models.

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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