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arXiv 1804.03361hep-ph
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NO $ν$ A和DUNE的光不育中微子效应

The Effect of a Light Sterile Neutrino at NO$ν$A and DUNE

Shivani Gupta, Zachary M. Matthews, Pankaj Sharma, Anthony G. Williams

摘要:

现在NOvA实验已经接近两年的运行时间,并且已经发布了一些初步数据,可以推断出振荡参数的一些限制。目前NOvA的最佳拟合是三个独立的结果,它们不明显的原因是它们产生几乎退化的概率曲线。有人假设,这些简并可以通过在NOvA运行反中微子和/或将其数据与T2 K相结合来解决。然而,如果存在无菌中微子,由于额外的自由度可以显着改变任何当前最佳拟合的振荡概率,这种简并分辨率可能会受到影响。我们的目标是调查这种预测能力的下降和DUNE实验对它的影响。现在,NOvA实验已经运行了几年,并已发布了一些初步的数据,可以推断出振荡参数的一些限制。NOvA的最佳拟合包括三个退化结果,它们不明显的原因是它们产生几乎退化的概率曲线。有人假设,这些简并可以通过在NOvA运行反中微子和/或将其数据与T2 K相结合来解决。然而,如果存在无菌中微子,由于额外的自由度可以显着改变任何这些最佳拟合的振荡概率,这种简并分辨率可能会受到影响。我们的目标是研究预测能力的这种下降以及DUNE实验对其的影响。根据2018年NOvA数据,我们还考虑了相同的拟合,但theta_{23} =45,以查看灵敏度结果是否不同。

英文摘要:

Now that the NOvA experiment is approaching two years run time and has released some preliminary data, some constraints for the oscillation parameters can be inferred. Currently the best fits for NOvA are three separate results, the reason they are indistinct is that they produce almost degenerate probability curves. It has been postulated that these degeneracies can be resolved by running antineutrinos at NOvA and/or combining its data with T2K. However, this degeneracy resolution power can be compromised if sterile neutrinos are present due to additional degrees of freedom that can significantly alter the oscillation probability for any of the current best fits. We aim to investigate this degradation in predictive power and the effect of the DUNE experiment on it. Now that the NOvA experiment has been running for a few years and has released some preliminary data, some constraints for the oscillation parameters can be inferred. The best fits for NOvA include three degenerate results, the reason they are indistinct is that they produce almost degenerate probability curves. It has been postulated that these degeneracies can be resolved by running antineutrinos at NOvA and/or combining its data with T2K. However, this degeneracy resolution power can be compromised if sterile neutrinos are present due to additional degrees of freedom that can significantly alter the oscillation probability for any of these best fits. We aim to investigate this degradation in predictive power and the effect of the DUNE experiment on it. In light of the 2018 NOvA data we also consider the same fits but with theta_{23}=45 to see if the sensitivity results are different.

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