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arXiv 2104.00425hep-phhep-ex
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CE $ν$ NS中的CP破坏和带电中微子非标准相互作用

CP-Violating and Charged Current Neutrino Non-standard Interactions in CE$ν$NS

Amir N. Khan, Douglas W. McKay, Werner Rodejohann

摘要:

中微子非标准相互作用(NSI)可以用中微子-核相干弹性散射来约束。本文从两个方面讨论了带电电流NSI在中微子产生中的作用和中性电流NSI在中微子探测中的CP破坏相。CP相的影响需要同时存在两个不同的风味改变中性电流NSI参数。应用这两种情况下的相干测量,我们得出的限制充电电流NSI,并发现需要更多的数据来竞争与现有的限制。关于CP阶段,我们展示了如何限制NSI参数显着依赖于相位的值。在中微子振荡实验中,也偶然地发现了影响相干散射的相同参数。我们发现,COHERENT提供了一套NSI参数,可以解释的差异,在最佳拟合值的标准CP-相位T2 K和NO $ν$ A的互补约束,而与LMA-黑暗的解决方案被排除的意义,可以被削弱的存在,这里介绍的额外的NSI参数。

英文摘要:

Neutrino non-standard interactions (NSI) can be constrained using coherent elastic neutrino-nucleus scattering. We discuss here two aspects in this respect, namely the effects of (i) charged current NSI in neutrino production and (ii) CP-violating phases associated with neutral current NSI in neutrino detection. Effects of CP-phases require the simultaneous presence of two different flavor-changing neutral current NSI parameters. Applying these two scenarios to the COHERENT measurement, we derive limits on charged current NSI and find that more data is required to compete with the existing limits. Regarding CP-phases, we show how the limits on the NSI parameters depend dramatically on the values of the phases. Accidentally, the same parameters influencing coherent scattering also show up in neutrino oscillation experiments. We find that COHERENT provides complementary constraints on the set of NSI parameters that can explain the discrepancy in the best-fit value of the standard CP-phase obtained by T2K and NO$ν$A, while the significance with which the LMA-Dark solution is ruled out can be weakened by the presence of additional NSI parameters introduced here.

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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