Abstract
The second- and third-order azimuthal anisotropy Fourier harmonics of charged particles produced in collisions, at , are studied over a wide range of event multiplicities. Multiparticle correlations are used to isolate global properties stemming from the collision overlap geometry. The second-order “elliptic” harmonic moment is obtained with high precision through four-, six-, and eight-particle correlations and, for the first time, the third-order “triangular” harmonic moment is studied using four-particle correlations. A sample of peripheral collisions at that covers a similar range of event multiplicities as the results is also analyzed. Model calculations of initial-state fluctuations in and collisions can be directly compared to the high-precision experimental results. This work provides new insight into the fluctuation-driven origin of the coefficients in and collisions, and into the dominating overall collision geometry in collisions at the earliest stages of heavy ion interactions.
- Received 25 April 2019
- Revised 3 November 2019
DOI:https://doi.org/10.1103/PhysRevC.101.014912
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
©2020 CERN, for the CMS Collaboration