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arXiv 0811.2888hep-ph
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电弱对称破缺中的复合费米子

Composite fermions in Electroweak Symmetry Breaking

Riccardo Barbieri, Gino Isidori, Duccio Pappadopulo

摘要:

如果电弱对称性被某些未指明的强动力学破缺,则复合费米子可能在SU(2)_LxSU(2)_R/SU(2)_{L+R}下具有确定的变换性质,并可能通过与所有标准夸克和轻子的混合而起到赋予质量的作用。假设这是这样的情况下,我们分析的作用,单线态,双峰和三重态的电弱精密度测试和风味物理。双胞胎和三胞胎一般不受欢迎。在单态的情况下,我们指定的风味组,允许保持CKM图片的风味物理的打破模式,我们讨论的复合和基本费米子之间的混合的影响。这些混合特别影响复合费米子的相当特殊的LHC现象。

英文摘要:

If the electroweak symmetry is broken by some unspecified strong dynamics, composite fermions may exist with definite transformation properties under SU(2)_L x SU(2)_R/SU(2)_{L+R} and may play a role in giving masses by mixing to all the standard quarks and leptons. Assuming this to be the case, we analyze the role of Singlets, Doublets and Triplets in the ElectroWeak Precision Tests and in Flavour Physics. Doublets and Triplets are generically disfavoured. In the Singlet case, we specify the breaking patterns of the flavour group that allow to keep the CKM picture of flavour physics and we discuss the effects of the mixing between composite and elementary fermions. These mixings affect in particular the rather peculiar LHC phenomenology of the composite fermions.

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