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

Chunjian Zhang; Jiangyong Jia; Jun Xu

doi:10.1016/j.physletb.2019.03.035

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

Chunjian Zhang
, Jiangyong Jia
, Jun Xu

Chemistry

Chinese Academy of Sciences
University of Chinese Academy of Sciences
Stony Brook University
CAS - Shanghai Advanced Research Institute

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	138-141
Number of pages	4
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	792
DOIs	https://doi.org/10.1016/j.physletb.2019.03.035
State	Published - May 10 2019

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Cite this

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title = "Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems",

abstract = "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.",

author = "Chunjian Zhang and Jiangyong Jia and Jun Xu",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2019",

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doi = "10.1016/j.physletb.2019.03.035",

language = "English",

volume = "792",

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journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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TY - JOUR

T1 - Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems

AU - Zhang, Chunjian

AU - Jia, Jiangyong

AU - Xu, Jun

PY - 2019/5/10

Y1 - 2019/5/10

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85063388999

U2 - 10.1016/j.physletb.2019.03.035

DO - 10.1016/j.physletb.2019.03.035

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AN - SCOPUS:85063388999

SN - 0370-2693

VL - 792

SP - 138

EP - 141

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

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

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