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arXiv 1102.0784hep-ph
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CKM型CP破坏的软起源

A soft origin for CKM-type CP violation

P. M. Ferreira, J. P. Silva, L. Lavoura

摘要:

我们提出了一个双Higgs二重态模型,具有$\mathbbm{Z}_3$对称性,其中CP破坏仅起源于标量势中的软(2维)耦合,并仅在CKM(夸克混合)矩阵中显示。特别地,在质量基中,中性标量的汤川相互作用都是实的。该模型只有11个参数来拟合六个夸克质量和四个独立的CKM矩阵观测量。我们发现区域的参数空间中,口味变化的中性耦合是如此的抑制,他们允许标量不超过几百个GeV的重量。

英文摘要:

We present a two-Higgs-doublet model, with a $\mathbbm{Z}_3$ symmetry, in which CP violation originates solely in a soft (dimension-2) coupling in the scalar potential, and reveals itself solely in the CKM (quark mixing) matrix. In particular, in the mass basis the Yukawa interactions of the neutral scalars are all real. The model has only eleven parameters to fit the six quark masses and the four independent CKM-matrix observables. We find regions of parameter space in which the flavour-changing neutral couplings are so suppressed that they allow the scalars to be no heavier than a few hundred GeV.

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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