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 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 and +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 +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 collisions.
Keywords
Cite
@article{arxiv.1812.03536,
title = {Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems},
author = {Chunjian Zhang and Jiangyong Jia and Jun Xu},
journal= {arXiv preprint arXiv:1812.03536},
year = {2019}
}