1. 新疆大学 物理科学与技术学院， 乌鲁木齐 830044； 2. 上海交通大学 物理与天文学院， 上海 200240
发布日期:2020-01-06通讯作者:谌勋，男，副研究员，电话(Tel)：15221074468；E-mail：chenxun@sjtu.edu.cn.作者简介:阿布都沙拉木·阿布都克力木(1992-)，男，维吾尔族，新疆维吾尔自治区喀什人，硕士生，从事暗物质直接探测方向研究.基金资助:国家自然科学基金(11365022,11435008,11455001,11505112,11525522，11765021)，科技部重点研发计划(2016YFA0400301)资助项目Application of Profile Likelihood Ratio and CLs Method in Data Analysis of PandaX-II Dark Matter Experiment
ABDUKERIM Abdusalam 1，CHEN Xun 2，IMINNIYAZ Hoernisa 11. School of Physics and Technology, Xinjiang University, Urumqi 830044, China; 2. School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
Published:2020-01-06摘要/Abstract
摘要： 目前世界上最为领先的几个暗物质直接探测实验都使用了剖面似然比方法来对最终的暗物质数据进行统计学分析，其中PandaX-II 实验最近发表的结果结合剖面似然比统计和CLs方法给出了对暗物质与核子若干相互作用截面的限制.本文在描述该统计方法的基础上，以PandaX-II 实验中的数据分析为例，介绍了具体的剖面似然比的构造方式，再应用CLs方法给出暗物质与普通物质发生非弹性散射的截面上限.
关键词: 暗物质直接探测； 数据分析； 非弹性散射； 剖面似然比； CLs方法
Abstract: The profile likelihood ratio statistics is used in the leading dark matter direct detection experiments around the world to perform the statistical analysis on the data. The results recently published in PandaX-II experiment present several constraints on the cross sections of dark matter scattering off nucleon via profile likelihood ratio and CLs method. This article introduces profile likelihood ratio and CLs method in detail and discusses how to construct profile likelihood ratio with the data analysis of PandaX-II as an example. The upper limits of the inelastic scattering cross section between dark matter particle and nucleon are obtained with CLs method.
Key words: dark matter direct detection; data analysis; inelastic scattering; profile likelihood ratio; CLs method
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