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arXiv 2004.00017hep-phhep-ex
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在ESSnuSB测试轻子味模型

Testing Lepton Flavor Models at ESSnuSB

Mattias Blennow, Monojit Ghosh, Tommy Ohlsson, Arsenii Titov

备注：
38 pages, 12 figures, 10 tables; several comments added; typos corrected; matches version published in JHEP
发表信息：
JHEP 07 (2020) 014
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摘要：

我们回顾和研究轻子味模型，源于离散的非阿贝尔味对称性，描述了一个或两个自由模型参数。首先，我们面对11个单参数和7个双参数模型与当前的结果轻子混合角从全球适合中微子振荡数据。我们发现，五个一个和五个两个参数的模型生存的对抗测试在$3σ$。其次，我们研究如何在瑞典的ESSnuSB实验中区分这十个单参数和双参数轻子味模型。我们发现，三个单参数模型预测$\sinδ_{\rm CP}=0$可以区分从这两个预测$|\sinδ_{\rm CP}|=1$至少$7σ$。最后，我们发现，如果轻子混合参数的真值与当前的最佳拟合值接近，则至少$5σ$可以排除5个单参数模型中的3个，而至少$3σ$可以排除2个单参数模型以及至多2个双参数模型.

英文摘要：

We review and investigate lepton flavor models, stemming from discrete non-Abelian flavor symmetries, described by one or two free model parameters. First, we confront eleven one- and seven two-parameter models with current results on leptonic mixing angles from global fits to neutrino oscillation data. We find that five of the one- and five of the two-parameter models survive the confrontation test at $3σ$. Second, we investigate how these ten one- and two-parameter lepton flavor models may be discriminated at the proposed ESSnuSB experiment in Sweden. We show that the three one-parameter models that predict $\sinδ_{\rm CP}=0$ can be distinguished from those two that predict $|\sinδ_{\rm CP}|=1$ by at least $7σ$. Finally, we find that three of the five one-parameter models can be excluded by at least $5σ$ and two of the one-parameter as well as at most two of the five two-parameter models can be excluded by at least $3σ$ with ESSnuSB if the true values of the leptonic mixing parameters remain close to the present best-fit values.

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