Zhou, M;
Aaboud, M;
Aad, G;
Abbott, B;
Abdinov, O;
Abeloos, B;
Abhayasinghe, DK;
... Zwalinski, L; + view all
(2019)
Flow fluctuations in Pb plus Pb collisions at root s(NN)=5.02 TeV with the ATLAS detector.
Nuclear Physics A
, 982
pp. 323-326.
10.1016/j.nuclphysa.2018.09.012.
Preview |
Text
1-s2.0-S0375947418302008-main.pdf - Published Version Download (212kB) | Preview |
Abstract
Measurements of four-particle cumulants cn{4} for n = 1, 2, 3, 4 are presented using 470 μb−1 of Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector at the LHC. These cumulants provide information on the event-by-event fluctuations of single harmonics p(vn). For the first time, a negative c1{4} is observed. The c4{4} is found to be negative in central collisions but changes sign around 20 − 25% centrality. This behavior is consistent with a nonlinear contribution to v4 that is proportional to v2 2. c2{4} and c3{4} are calculated using two reference event classes in order to investigate the influence of volume fluctuations. Over most of the centrality range, c2{4} and c3{4} are found to be negative, while in the ultra-central collisions, c2{4} changes sign and becomes positive, suggesting a deviation from Gaussian behavior in the event-by-event fluctuation of v2. The magnitudes of the sign change are also found to be dependent of the event class definition
| Type: | Article |
|---|---|
| Title: | Flow fluctuations in Pb plus Pb collisions at root s(NN)=5.02 TeV with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.nuclphysa.2018.09.012 |
| Publisher version: | https://doi.org/10.1016/j.nuclphysa.2018.09.012 |
| Language: | English |
| Additional information: | This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
| Keywords: | Multi-Particle Correlation, Cumulants, Heavy-ion, Flow Fluctuation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10069170 |
Archive Staff Only
 |
View Item |
