Study of a background reconstruction method for the measurement of D-meson azimuthal angular correlations

• 作者: Long Ma Xin Dong Huan-Zhong Huang Yu-Gang Ma
• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH
• 页码范围: 102-108
• 页数: 7页
• 语种: 英文

摘要

We studied experimental background recon-struction methods for the measurement of the D-D cor-relation using PYTHIA simulation.The like-sign(LS)and side-band(SB)background methods,which are widely used in the experimental measurements of single D-meson production yields,were deployed for correlation study.It was found that the LS method,which describes the com-binatorial background of single D0 meson yields,fails to reproduce the correlated background in the D0-D(0)cor-relation measurement,while the SB background method yields a good description of the background for both single D0 yields and the correlated background of the D0-D(0)correlation measurement.We further examined the validity of the correlation methods under different signal-to-back-ground ratios,providing direct references for experimental measurements.