中微子暗面的COHERENT启示
A COHERENT enlightenment of the neutrino Dark Side
摘要：
在存在非标准中微子相互作用（NSI）的情况下，振荡数据受到简并的影响，简并允许太阳混合角位于第二个八分圆（又名暗侧），并意味着大气质量平方差的符号翻转。这导致了中微子质量排序的确定上的模糊性，这是当前和未来实验中微子计划的主要目标之一。我们表明，最近的观测相干中微子-核散射的相干实验，结合全球振荡数据，排除了NSI简并在$3.1σ$（$3.6σ$）CL与上（下）夸克的NSI。
英文摘要：
In the presence of non-standard neutrino interactions (NSI), oscillation data are affected by a degeneracy which allows the solar mixing angle to be in the second octant (aka the dark side) and implies a sign flip of the atmospheric mass-squared difference. This leads to an ambiguity in the determination of the ordering of neutrino masses, one of the main goals of the current and future experimental neutrino program. We show that the recent observation of coherent neutrino--nucleus scattering by the COHERENT experiment, in combination with global oscillation data, excludes the NSI degeneracy at the $3.1σ$ ($3.6σ$) CL for NSI with up (down) quarks.
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