Publication : t08/020
Event-plane flow analysis without non-flow effects
Bilandzic A. (NIKHEF, Kruislaan 409, NL-1098 SJ Amsterdam, THE NETHERLANDS)Kolk N.v.d. (NIKHEF, Kruislaan 409, NL-1098 SJ Amsterdam, THE NETHERLANDS)
Ollitrault J.-Y. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Snellings R. (NIKHEF, Kruislaan 409, NL-1098 SJ Amsterdam, THE NETHERLANDS)
Abstract:Année de publication : 2011
The event-plane method, which is widely used to analyze anisotropic flow in nucleus-nucleus collisions, is known to be biased by nonflow effects,especially at high p_t. Various methods (cumulants, Lee-Yang zeroes) have been proposed to eliminate nonflow effects, but their implementation is tedious, which has limited their application so far. In this paper, we show that the Lee-Yang-zeroes method can be recast in a form similar to the standard event-plane analysis. Nonflow correlations are eliminated by using the information from the length of the flow vector, in addition to the event-plane angle. This opens the way to improved analyses of elliptic flow and azimuthally-sensitive observables at RHIC and LHC.
Revue : Phys. Rev. C 83 014909 (2011)
DOI : 10.1103/PhysRevC.83.014909
Preprint : arXiv:0801.3915
Langue : Anglais
Fichier(s) à télécharger :
publi.pdf
