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arXiv 1503.07543hep-ph
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A5与广义CP的混合角和相位关联及其发现前景

Mixing angle and phase correlations from A5 with generalised CP and their prospects for discovery

Peter Ballett, Silvia Pascoli, Jessica Turner

摘要:

所观察到的轻子混合模式可以解释的存在下,一个离散的味对称打破到剩余的低能量子群。在这种情况下,残留的广义CP对称性允许PMNS矩阵的参数,包括马约拉纳相位,预测在一个小的输入参数集。在这篇文章中,我们研究的混合参数相关所产生的对称群A5,包括广义CP随后打破其所有可能的剩余对称。集中在这些模式,满足目前的实验范围内,我们然后提供了一个详细的分析,可测量的签名访问计划的反应堆,超束和无中微子双β衰变实验。我们还讨论了从长期项目,如中微子工厂的高精度测量可以发挥的作用。这项工作提供了一个具体的例子,即将到来的实验计划的协同作用,使味道对称模型进行彻底的调查。事实上,由于可观察到的丰富的相关性,我们发现实验计划的每一步都可以为评估这种味道对称模式做出重要贡献,最终我们已经确定的所有模式都可以被排除在外,或者找到强有力的证据来证明它们的持续相关性。

英文摘要:

The observed leptonic mixing pattern could be explained by the presence of a discrete flavour symmetry broken into residual subgroups at low energies. In this scenario, a residual generalised CP symmetry allows the parameters of the PMNS matrix, including Majorana phases, to be predicted in terms of a small set of input parameters. In this article, we study the mixing parameter correlations arising from the symmetry group A5 including generalised CP subsequently broken into all of its possible residual symmetries. Focusing on those patterns which satisfy present experimental bounds, we then provide a detailed analysis of the measurable signatures accessible to the planned reactor, superbeam and neutrinoless double beta decay experiments. We also discuss the role which could be played by high-precision measurements from longer term projects such as the Neutrino Factory. This work provides a concrete example of how the synergies of the upcoming experimental programme allow flavour symmetric models to be thoroughly investigated. Indeed, thanks to the rich tapestry of observable correlations, we find that each step of the experimental programme can make important contributions to the assessment of such flavour-symmetric patterns, and ultimately all patterns that we have identified can be excluded, or strong evidence found for their continued relevance.

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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