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arXiv 1206.7072hep-ph
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Delta(27)味对称模型中轻子混合的最大CP破坏

Maximal CP violation in lepton mixing from a model with Delta(27) flavour symmetry

P. M. Ferreira, W. Grimus, L. Lavoura, P. O. Ludl

摘要:

我们提出了一个简单的机制,|U_{mu j}| = |U_{tau j}|对于轻子混合矩阵U中的所有j = 1,2,3.这意味着最大的大气中微子混合和最大的CP破坏阶段,但不限制反应堆混合角theta_{13}。我们在两个可重正化的跷跷板模型中实现了所提出的机制,这些模型具有与基于风味对称群Delta(27)的模型非常相似的特征。在模型的预测中,有一个确定的,虽然模糊的,绝对中微子质量标度,绝对中微子质量标度和无中微子双β衰变中的有效马约拉纳质量之间的严格相关性。

英文摘要:

We propose a simple mechanism which enforces |U_{mu j}| = | U_{tau j}| forall j = 1,2,3 in the lepton mixing matrix U. This implies maximal atmospheric neutrino mixing and a maximal CP-violating phase but does not constrain the reactor mixing angle theta_{13}. We implement the proposed mechanism in two renormalizable seesaw models which have features strongly resembling those of models based on a flavour symmetry group Delta(27). Among the predictions of the models, there is a determination, although ambiguous, of the absolute neutrino mass scale, and a stringent correlation between the absolute neutrino mass scale and the effective Majorana mass in neutrinoless double-beta decay.

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