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arXiv 1206.1802hep-ph
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超对称中的U(2)^3味对称

A U(2)^3 flavour symmetry in Supersymmetry

Filippo Sala

摘要:

作用于前两代夸克的U(2)^3味对称性部分解释了汤川耦合的层次结构,并为前两代夸克较重的超对称性提供了一个自然的嵌入,其中对撞机约束与自然性要求不冲突,SUSY CP问题得到了解决。在这种情况下,一个特定的图案味对称性破缺被认为是。K、B_d和B_s混合振幅显示出明确的相关性,可以解决CKM拟合中存在的张力,以这种方式指向低于约1.5 TeV的sbottom和Gluino质量。潜在的相当大的贡献,间接和直接的CP破坏在B衰变是允许的,即使在没有味盲阶段。如果观察到一些效应,则Delta(F)= 2和Delta(B)= 1可观测值的特殊模式可以允许区分此模型和其他模型。

英文摘要:

A U(2)^3 flavour symmetry acting on the first two generations of quarks partially explains the hierarchies of the yukawa couplings, and provides a natural embedding for Supersymmetry with heavier first two generations, where collider constraints are not in conflict with the requirement of naturalness and the SUSY CP problem is solved. Within this context a specific pattern of flavour symmetry breaking is considered. The K, B_d and B_s mixing amplitudes show a definite correlation that can resolve existing tensions in the CKM fit, pointing in this way to sbottom and gluino masses below about 1.5 TeV. Potentially sizeable contributions to both indirect and direct CP violation in B decays are allowed, even in the absence of flavour-blind phases. In case some effects are observed, the peculiar pattern in Delta(F) = 2 and Delta(B) = 1 observables may allow to distinguish between this and other 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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