用相干中微子散射提取核形状因子
Extracting nuclear form factors with coherent neutrino scattering
摘要：
相干弹性中微子-核散射（CEvNS）可以用来确定核形状因子的中子部分，从而揭示原子核结构的内在性质。与其他方法相比，CEvNS既不受强相互作用的影响，也不受库仑畸变的影响。我们提出了精确的测量CEvNS与即将到来的加速器设施，并确定相应的要求，这样的中微子探测器。我们发现，最显着的背景来自快中子，诱导宇宙成因μ子或π介子衰变在休息的目标站。利用吨级液态惰性气体探测器，我们不仅可以实现中子半径测量的百分之一级精度，而且还可以阐明高阶矩对核形状因子的贡献。
英文摘要：
Coherent elastic neutrino-nucleus scattering (CEvNS) can be used to determine the neutron part of nuclear form factors, unlocking intrinsic properties of nuclear structure. In contrast with other such methods, CEvNS is free from both strong interaction effects and Coulomb distortions. We propose precision measurements of CEvNS with an upcoming accelerator facility and determine the corresponding requirements for such a neutrino detector. We find that most significant backgrounds come from fast neutrons, induced by cosmogenic muons or from the pion decays at rest in the target station. With ton-scale liquid noble gas detectors, we will not only achieve percent level precision in the measurement of neutron radii but also clarify contributions of higher-order moments to nuclear form factors.
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