Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/63609
Título: | Flow fluctuations in Pb plus Pb collisions at root s(NN)=5.02 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
Palavras-chave: | Multi-Particle Correlation Cumulants Heavy-ion Flow Fluctuation |
Data: | 2019 |
Editora: | Elsevier 1 |
Revista: | Nuclear Physics A |
Citação: | Zhou, M. L., Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., . . . Collaboration, A. (2019). Flow fluctuations in Pb plus Pb collisions at root s(NN)=5.02 TeV with the ATLAS detector. Nuclear Physics A, 982, 323-326. doi: 10.1016/j.nuclphysa.2018.09.012 |
Resumo(s): | Measurements of four-particle cumulants c(n){4} for n = 1, 2, 3, 4 are presented using 470 mu b(-1) of Pb+Pb collisions at root s(NN) = 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 c(1){4} is observed. The c(4){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 v(4) that is proportional to v(2)(2). c(2){4} and c(3){4} are calculated using two reference event classes in order to investigate the influence of volume fluctuations. Over most of the centrality range, c(2){4} and c(3){4} are found to be negative, while in the ultra-central collisions, c(2){4} changes sign and becomes positive, suggesting a deviation from Gaussian behavior in the event-by-event fluctuation of v(2). The magnitudes of the sign change are also found to be dependent of the event class definition . |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/63609 |
DOI: | 10.1016/j.nuclphysa.2018.09.012 |
ISSN: | 0375-9474 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0375947418302008 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1-s2.0-S0375947418302008-main.pdf | 207,88 kB | Adobe PDF | Ver/Abrir |