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arXiv 0804.1546hep-ph
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U_PMNS=U_l^dagger U_nu中的纠缠最大混合,以及与复杂质量纹理的连接

Entangled maximal mixings in U_PMNS=U_l^dagger U_nu, and a connection to complex mass textures

Svenja Niehage, Walter Winter

摘要:

本文讨论了U_PMNS=U_l^dagger U_nu在U_l和U_nu中都具有极大混合的两种不同构型。假设非最大混合角很小,这意味着它们可以扩展到。由于我们特别感兴趣的是CP破坏的影响,我们充分考虑复杂的阶段。我们证明,一种可能性导致本质上大θ_13和强烈的偏差,从最大的混合。另一种可能性一般接近于三-双极大混合,并且允许大的CP破坏。我们演示了如何确定θ_23八分圆和delta_CP的精确测量可以区分不同的定性子情况。为了进一步限制非物理和可观察的相位,我们将我们的配置与复杂的质量矩阵纹理联系起来。特别是,我们专注于相位图案,可以产生一个单一的复杂的数量η = θ_C exp(i φ),这可以由Froggatt-Nielsen模型的动机的权力。例如,事实证明,在所有讨论的情况下,其中一个马约拉纳相位与Phi到前导阶成比例。在整个研究中,我们遇到了三种不同的求和规则,我们系统地进行了分类。

英文摘要:

We discuss two different configurations of U_PMNS=U_l^dagger U_nu with maximal mixings in both U_l and U_nu. The non-maximal mixing angles are assumed to be small, which means that they can be expanded in. Since we are particularly interested in the implications for CP violation, we fully take into account complex phases. We demonstrate that one possibility leads to intrinsically large theta_13 and strong deviations from maximal mixings. The other possibility is generically close to tri-bimaximal mixing, and allows for large CP violation. We demonstrate how the determination of the theta_23 octant and the precision measurement of delta_CP could discriminate among different qualitative sub-cases. In order to constrain the unphysical and observable phases even further, we relate our configurations to complex mass matrix textures. In particular, we focus on phase patterns which could be generated by powers of a single complex quantity eta=theta_C exp(i Phi), which can be motivated by Froggatt-Nielsen-like models. For example, it turns out that in all of the discussed cases, one of the Majorana phases is proportional to Phi to leading order. In the entire study, we encounter three different classes of sum rules, which we systematically classify.

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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