Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5493960 | Nuclear Physics A | 2017 | 4 Pages |
Abstract
The first comparison of anisotropy harmonics (vn, n = 2-4) and event-by-event correlations of different orders between p-p (13 TeV), p-Pb (5.02 and 8.16 TeV) and Pb-Pb (5.02 TeV) as a function of multiplicity is presented. The vn coefficients are extracted via long-range (|Îη|>2) two-particle correlations reaching a very-high-multiplicity region. Event-by-event correlations among v2, v3 and v4 are measured using the four-particle symmetric cumulant (SC(n,m), n = 2, m = 3, 4). For high-multiplicity (more than 100 tracks) events, v2 is found to have a negative correlation with the v3, while the v2 and v4 are positively correlated. Normalized by the two-particle vn, the SC(2,3) are quantitatively similar for p-Pb and Pb-Pb data, while a strong system size dependence is observed for SC(2,4). These new data provide important insights to the origin of collectivity observed in small collision systems.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Maxime Guilbaud, CMS Collaboration CMS Collaboration,