Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems

Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems

The Multi-particle technique has been used to unravel the nature of the long-range collectivity in small collision systems. A large three-particle mixed-harmonic correlation (or event-plane correlation) signal was recently observed by the ATLAS Collaboration, but the role of non-flow correlations is...

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Main Authors: Chunjian Zhang, Jiangyong Jia, Jun Xu
Format: Article
Language:English
Published: Elsevier 2019-05-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269319301923
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spelling doaj-7fd262f6fec34b809324edc63a86fb952020-11-25T02:22:47ZengElsevierPhysics Letters B0370-26932019-05-01792138141Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systemsChunjian Zhang0Jiangyong Jia1Jun Xu2Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USADepartment of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA; Physics Department, Brookhaven National Laboratory, Upton, NY 11976, USA; Institute of Particle Physics, Central China Normal University, Wuhan,430079, China; Corresponding author.Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaThe Multi-particle technique has been used to unravel the nature of the long-range collectivity in small collision systems. A large three-particle mixed-harmonic correlation (or event-plane correlation) signal was recently observed by the ATLAS Collaboration, but the role of non-flow correlations is not yet studied. We estimate the influence of non-flow correlations to the three-particle correlators in pp and p+Pb collisions using PYTHIA and HIJING models, and compare with the ATLAS results. The large non-flow effects from the jet and dijet production is found to be largely suppressed in p+Pb collisions using the subevent cumulant method by calculating the azimuthal correlation between two or more longitudinal pseudorapidity ranges. Depending on the experimental subevent method, however, the non-flow effects may still be significant in pp collisions. Future prospect to measure other multi-particle mixed-harmonic correlators in small systems are discussed.http://www.sciencedirect.com/science/article/pii/S0370269319301923
collection DOAJ
language English
format Article
sources DOAJ
author Chunjian Zhang
Jiangyong Jia
Jun Xu
spellingShingle Chunjian Zhang
Jiangyong Jia
Jun Xu
Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems
Physics Letters B
author_facet Chunjian Zhang
Jiangyong Jia
Jun Xu
author_sort Chunjian Zhang
title Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems
title_short Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems
title_full Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems
title_fullStr Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems
title_full_unstemmed Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems
title_sort non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2019-05-01
description The Multi-particle technique has been used to unravel the nature of the long-range collectivity in small collision systems. A large three-particle mixed-harmonic correlation (or event-plane correlation) signal was recently observed by the ATLAS Collaboration, but the role of non-flow correlations is not yet studied. We estimate the influence of non-flow correlations to the three-particle correlators in pp and p+Pb collisions using PYTHIA and HIJING models, and compare with the ATLAS results. The large non-flow effects from the jet and dijet production is found to be largely suppressed in p+Pb collisions using the subevent cumulant method by calculating the azimuthal correlation between two or more longitudinal pseudorapidity ranges. Depending on the experimental subevent method, however, the non-flow effects may still be significant in pp collisions. Future prospect to measure other multi-particle mixed-harmonic correlators in small systems are discussed.
url http://www.sciencedirect.com/science/article/pii/S0370269319301923
work_keys_str_mv AT chunjianzhang nonfloweffectsinthreeparticlemixedharmonicazimuthalcorrelationsinsmallcollisionsystems
AT jiangyongjia nonfloweffectsinthreeparticlemixedharmonicazimuthalcorrelationsinsmallcollisionsystems
AT junxu nonfloweffectsinthreeparticlemixedharmonicazimuthalcorrelationsinsmallcollisionsystems
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