Application of Profile Likelihood Ratio and CLs Method in Data Analysis of PandaX-II Dark Matter Experiment

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  • 1. School of Physics and Technology, Xinjiang University, Urumqi 830044, China; 2. School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

Online published: 2020-01-06

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.

Cite this article

ABDUKERIM Abdusalam,CHEN Xun,IMINNIYAZ Hoernisa . Application of Profile Likelihood Ratio and CLs Method in Data Analysis of PandaX-II Dark Matter Experiment[J]. Journal of Shanghai Jiaotong University, 2019 , 53(12) : 1508 -1514 . DOI: 10.16183/j.cnki.jsjtu.2019.12.015

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