Directed and Elliptic Flow in Pb+Pb collisions at 40 and 158 AGeV
Abstract
Directed and elliptic flow are reported for charged pions and protons as a function of transverse momentum, rapidity, and centrality in 40 and 158 AGeV Pb + Pb collisions. The standard method of correlating particles with an event plane is used. The directed flow of protons is small and shows little variation near to midrapidity, but rises fast towards projectile rapidity in the 40 AGeV data. For most peripheral collisions the flat region becomes negative resulting in changing sign three times. Elliptic flow doesn't seem to change very much from 40 AGeV to 158 AGeV. The difference is smaller than anticipated from the overall energy dependence from AGS to RHIC.
Keywords
Cite
@article{arxiv.nucl-ex/0212023,
title = {Directed and Elliptic Flow in Pb+Pb collisions at 40 and 158 AGeV},
author = {Alexander Wetzler and N. Borghini and P. M. Dinh and J. -Y. Ollitrault and A. M. Poskanzer and S. A. Voloshin and the NA49 Collaboration},
journal= {arXiv preprint arXiv:nucl-ex/0212023},
year = {2009}
}
Comments
Presented at 16th International Conference on Ultrarelativistic Nucleus-Nucelus Collisions, Quark Matter 2002 (QM 2002), Nantes, France, 18-24 Jul 2002, 4 pages, 3 figures