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arXiv 1907.04828nucl-exhep-exhep-ph
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CsI [Na]对核粒子的响应:对Coherent弹性中微子-核散射(CE $ν$ NS)的影响

Response of CsI[Na] to Nuclear Recoils: Impact on Coherent Elastic Neutrino-Nucleus Scattering (CE$ν$NS)

J. I. Collar, A. R. L. Kavner, C. M. Lewis

摘要:

本文提出了一种测量CsI[Na]低能核反冲淬灭因子的新方法。过去的测量被重新审视,确定和纠正几个系统性的影响。由此产生的全球数据是很好地描述了一个基于物理的模型,在这种材料中的离子产生闪烁,在协议的现象学考虑。在新的模型中的不确定性减少了四个因素的能量无关淬火因素最初通过作为一个妥协的COHERENT协作。生成了CE $ν$ NS首次测量的与标准模型预测的显著改进的一致性。通过CE $ν$ NS实验,我们强调了淬灭因子对寻找新物理的关键影响。

英文摘要:

A new measurement of the quenching factor for low-energy nuclear recoils in CsI[Na] is presented. Past measurements are revisited, identifying and correcting several systematic effects. The resulting global data are well-described by a physics-based model for the generation of scintillation by ions in this material, in agreement with phenomenological considerations. The uncertainty in the new model is reduced by a factor of four with respect to an energy-independent quenching factor initially adopted as a compromise by the COHERENT collaboration. A significantly improved agreement with Standard Model predictions for the first measurement of CE$ν$NS is generated. We emphasize the critical impact of the quenching factor on the search for new physics via CE$ν$NS experiments.

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