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arXiv 1801.05656hep-ph
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中微子非标准相互作用作为检验味道对称性的入口

Neutrino non-standard interactions as a portal to test flavour symmetries

TseChun Wang, Ye-Ling Zhou

摘要:

首次讨论了将非阿贝尔离散味对称性引入中微子非标准相互作用。为了确定性,我们选择$A_4$作为味对称,随后在中微子扇区中将其破缺为剩余对称$Z_2$。我们提供了一个一般性的讨论,从高维运营商($d\leqslant8$)的味道结构的NSI不诱导不必要的树级4-带电费米子相互作用。获得了$A_4$和$Z_2$激发的NSI织构。高维算子的UV完成导致NSI纹理的额外实验约束。我们从现象学的角度研究了DUNE中物效NSIs的实现,发现DUNE可以用高水平的统计来检验$A_4$。我们还提出了UV完全模型建议的和规则的排除限制。我们的研究结果表明,NSI的影响,虽然预计是小的DUNE,可以提供有用的信息,可能会扩大我们的理解的味道对称性。

英文摘要:

Imposing non-Abelian discrete flavour symmetries to neutrino non-standard interactions (NSIs) is discussed for the first time. For definiteness, we choose $A_4$ as the flavour symmetry, which is subsequently broken to the residual symmetry $Z_2$ in the neutrino sector. We provide a general discussion on flavour structures of NSIs from higher-dimensional operators ($d\leqslant8$) without inducing unnecessary tree-level 4-charged-fermion interactions. Both $A_4$- and $Z_2$-motivated NSI textures are obtained. UV completions of higher-dimensional operators lead to extra experimental constraints on NSI textures. We study the implementation of matter-effect NSIs in DUNE from phenomenological point of view, and discover that DUNE can test $A_4$ with a high level of statistics. We also present exclusion limits of sum rules suggested by UV-complete models. Our result shows that the NSI effects, though predicted to be small for DUNE, could provide useful information that might extend our understanding of the flavour symmetry.

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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