Flow fluctuations in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02\text{TeV}$ with the ATLAS detector

Journal Article · 21 January 2019 · Nuclear Physics. A

DOI: https://doi.org/10.1016/j.nuclphysa.2018.09.012 · OSTI ID:1503110

Zhou, Mingliang ^[1]

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1. Stony Brook Univ., Stony Brook, NY (United States)

Measurements of four-particle cumulants c_n{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(v_n). 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. Here this behavior is consistent with a nonlinear contribution to v₄ that is proportional to v²₂ • c₂{4}. and c₃{4} are calculated using two reference event classes in order to investigate the influence of volume fluctuations.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-76SF00515
• OSTI ID: 1503110
• Journal Information: Nuclear Physics. A, Journal Name: Nuclear Physics. A Journal Issue: C Vol. 982; ISSN 0375-9474
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English