Trying to understand the ridge effect in hydrodynamic model
Abstract
In a recent paper, the hydrodynamic code NeXSPheRIO was used in conjunction with STAR analysis methods to study two-particle correlations as function of Delta_eta and Delta_phi. Both the ridge-like near-side and the double-hump away-side structures were obtained. However, the mechanism of ridge production was not clear. In order to understand it, we study a simple model with only one high-energy density peripheral tube in a smooth cylindrical back-ground, with longitudinal boost invariance. The results are rather surprising, but the model does produce the triple-ridge structure with one high ridge plus two lower ones placed symmetrically with respect to the former one. The shape of this structure is rather stable in a wide range of parameters.
Cite
@article{arxiv.0911.0811,
title = {Trying to understand the ridge effect in hydrodynamic model},
author = {Yogiro Hama and Rone Peterson G. Andrade and Frederique Grassi and Wei-Liang Qian},
journal= {arXiv preprint arXiv:0911.0811},
year = {2012}
}
Comments
5 pages, 8 figures, prepared for XXXIX International Symposium on Multiparticle Dynamics, Belarus, 4-9 September 2009 and also for V Workshop on Particle Correlations and Femtoscopy, CERN (Switzerland), 14-17 October 2009