Higher-order moments of the elliptic flow distribution in PbPb collisions at sNN = 5.02 TeV
Küçük Resim Yok
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Science and Business Media Deutschland GmbH
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The hydrodynamic flow-like behavior of charged hadrons in high-energy lead-lead collisions is studied through multiparticle correlations. The elliptic anisotropy values based on different orders of multiparticle cumulants, v2{2k}, are measured up to the tenth order (k = 5) as functions of the collision centrality at a nucleon-nucleon center-of-mass energy of sNN = 5.02 TeV. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of 0.607 nb?1. A hierarchy is observed between the coefficients, with v2{2} > v2{4} ? v2{6} ? v2{8} ? v2{10}. Based on these results, centrality-dependent moments for the fluctuation-driven event-by-event v2 distribution are determined, including the skewness, kurtosis and, for the first time, superskewness. Assuming a hydrodynamic expansion of the produced medium, these moments directly probe the initial-state geometry in high-energy nucleus-nucleus collisions. © The Author(s) 2024.
Açıklama
Anahtar Kelimeler
Event-by-Event fluctuation, Harmonic Flow, Heavy Ion Experiments, Relativistic Heavy Ion Physics
Kaynak
Journal of High Energy Physics
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
2024
Sayı
2
