Publication : t09/084
Effect of nonflow and flow fluctuations on elliptic flow methods
Ollitrault J.-Y. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)Poskanzer A.M. (Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley CA 94720, USA)
Voloshin S.A. (Wayne State University, Detroit, MI 48202, USA)
Abstract:Année de publication : 2009
We discuss how the different estimates of elliptic flow are influenced by flow fluctuations and nonflow effects. It is explained why the event-plane method yields estimates between the two-particle correlation methods and the multiparticle correlation methods. It is argued that nonflow effects and fluctuations cannot be disentangled without other assumptions. However, we provide equations where, with reasonable assumptions about fluctuations and nonflow, all measured values of elliptic flow converge to a unique mean elliptic flow in the participant plane. Thus, the 20% spread in observed elliptic flow measurements from different analysis methods is no longer mysterious.
Revue : Nucl. Phys. A 830 279c-282c (2009)
Conférence - Communication : par A. M. Poskanzer; 21st International Conference on Ultrarelativistic Nucleus-Nucleus collisions (Quark Matter 2009) ; Knoxville, Tennessee ; 2009-03-30 / 2009-04-04
DOI : 10.1016/j.nuclphysa.2009.09.026
Preprint : arXiv:0906.3463
Langue : Anglais
Fichier(s) à télécharger :
publi.pdf
