Event-plane flow analysis without non-flow effects
Abstract
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 . 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 strongly suppressed 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.
Keywords
Cite
@article{arxiv.0801.3915,
title = {Event-plane flow analysis without non-flow effects},
author = {Ante Bilandzic and Naomi van der Kolk and Jean-Yves Ollitrault and Raimond Snellings},
journal= {arXiv preprint arXiv:0801.3915},
year = {2015}
}
Comments
8 pages. Extended revision: Section II rewritten