arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.3988hep-phhep-ex
收藏

结合PINGU和大亚湾II确定中微子质量序

Determination of the neutrino mass ordering by combining PINGU and Daya Bay II

Mattias Blennow, Thomas Schwetz

摘要:

相对较大的θ_13测量值为确定中微子质量序提供了多种可能性,其中包括利用冰立方中微子望远镜的低能扩展装置PINGU观测大气中微子的物质效应,或在基线约60 km的反应堆中微子实验(如大亚湾二期工程)上进行中微子能谱的高统计测量。在这项工作中,我们指出了这两种方法之间的协同作用,这是基于这样一个事实,即当用错误的中微子质量排序分析数据时,最佳拟合出现在不同的|Δ m^2_31|平谷和大亚湾二期。因此,错误的质量排序可以通过推断的值的不匹配来排除。|Δ m^2_31|这要归功于两个实验的Δ m^2_31的出色精度。我们进行数值研究的平谷和大亚湾II的敏感性,并表明,协同效应可能会导致一个高的显着性确定的质量排序,即使在个别实验只获得差的灵敏度的情况下。

英文摘要:

The relatively large measured value of theta_13 has opened various possiblities to determine the neutrino mass ordering, among them using PINGU, the low-energy extention of the IceCube neutrino telescope, to observe matter effects in atmospheric neutrinos, or a high statistics measurment of the neutrino energy spectrum at a reactor neutrino experiment with a baseline of around 60 km, such as the Daya Bay II project. In this work we point out a synergy between these two approaches based on the fact that when data are analysed with the wrong neutrino mass ordering the best fit occurs at different values of |Delta m^2_31| for PINGU and Daya Bay II. Hence, the wrong mass ordering can be excluded by a mismatch of the values inferred for |Delta m^2_31|, thanks to the excellent accuracy for Delta m^2_31 of both experiments. We perform numerical studies of PINGU and Daya Bay II sensitivities and show that the synergy effect may lead to a high significance determination of the mass ordering even in situations where the individual experiments obtain only poor sensitivity.

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。

↑