arXiv:hep-ph/0606113·v1·High Energy Physics — Phenomenology
Analysis of pion elliptic flows and HBT interferometry in a granular quark-gluon plasma droplet model
Wei-Ning Zhang (1,2,3) · Yan-Yu Ren (2) · Cheuk-Yin Wong (3,4) · ((1) Dalian University of Technology, Dalian, (2) Harbin Institute of Technology, Harbin, (3) Oak Ridge National Laboratory, and (4) University of Tennessee)
Abstract
In many simulations of high-energy heavy-ion collisions on an event-by-event analysis, it is known that the initial energy density distribution in the transverse plane is highly fluctuating. Subsequent longitudinal expansion will lead to many longitudinal tubes of quark-gluon plasma which have tendencies to break up into many spherical droplets because of sausage instabilities. We are therefore motivated to use a model of quark-gluon plasma granular droplets that evolve hydrodynamically to investigate pion elliptic flows and Hanbury-Brown-Twiss interferometry. We find that the data of pion transverse momentum spectra, elliptic flows, and HBT radii in \sqrt{s_{NN}}=200 GeV Au + Au collisions at RHIC can be described well by an expanding source of granular droplets with an anisotropic velocity distribution.
Comments: 9 pages, 6 figures, in Latex