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arXiv 1701.04828hep-phhep-ex
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减少非标准中微子相互作用中的暗面

Curtailing the Dark Side in Non-Standard Neutrino Interactions

Pilar Coloma, Peter B. Denton, M. C. Gonzalez-Garcia, Michele Maltoni, Thomas Schwetz

摘要:

在存在非标准中微子相互作用的情况下,中微子味演化方程受到简并度的影响,导致所谓的LMA-Dark解。它需要在第二个八分圆的太阳混合角,这意味着中微子质量排序的模糊性。非振荡实验需要打破这种简并性。我们进行了综合分析的数据振荡实验与中微子散射实验CHARM和NuTeV。我们发现,如果中微子与下夸克发生非标准相互作用,简并度可以被提升,但对于上夸克,简并度仍然存在。然而,CHARM和NuTeV的限制适用于只有当新的相互作用发生通过介质不轻于电弱标度。对于光介质,我们考虑的可能性,解决简并使用未来的相干中微子核散射实验的数据。我们发现,对于一个实验,使用停止介子中微子源,LMA-暗简并将得到解决,或在中微子部门的新的相互作用的存在将建立具有高度的意义。

英文摘要:

In presence of non-standard neutrino interactions the neutrino flavor evolution equation is affected by a degeneracy which leads to the so-called LMA-Dark solution. It requires a solar mixing angle in the second octant and implies an ambiguity in the neutrino mass ordering. Non-oscillation experiments are required to break this degeneracy. We perform a combined analysis of data from oscillation experiments with the neutrino scattering experiments CHARM and NuTeV. We find that the degeneracy can be lifted if the non-standard neutrino interactions take place with down quarks, but it remains for up quarks. However, CHARM and NuTeV constraints apply only if the new interactions take place through mediators not much lighter than the electroweak scale. For light mediators we consider the possibility to resolve the degeneracy by using data from future coherent neutrino-nucleus scattering experiments. We find that, for an experiment using a stopped-pion neutrino source, the LMA-Dark degeneracy will either be resolved, or the presence of new interactions in the neutrino sector will be established with high significance.

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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