Non-Gaussian Elliptic-flow Fluctuations in PbPb Collisions at ?sNN=5.02 TeV
Yükleniyor...
Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
The CMS Collaboration
Erişim Hakkı
Özet
Event-by-event fluctuations in the elliptic-flow coefficient v2are studied in PbPb collisions at ?sNN=5.02TeVusing the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v2)for charged particles with transverse momentum 0.3 <pT<3.0GeV/cand pseudorapidity |?| <1.0are determined for different collision centrality classes. The moments of the p(v2)distributions are used to calculate the v2coefficients based on cumulant orders 2, 4, 6, and 8. A rank ordering of the higher-order cumulant results and nonzero standardized skewness values obtained for the p(v2)distributions indicate non-Gaussian initial-state fluctuations. Bessel–Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy
Açıklama
Anahtar Kelimeler
Event-by-event elliptic flow, Non-Gaussian flow fluctuations, Unfolding
Kaynak
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
Sayı
Künye
Physics Letters B 789( 2019) 643–665
