Buda-Lund hydro model for ellipsoidally symmetric fireballs and the elliptic flow at RHIC

摘要

The ellipsoidally symmetric extension of Buda-Lund hydrodynamic model isshown here to yield a natural description of the pseudorapidity dependence ofthe elliptic flow $v_2(\eta)$, as determined recently by the PHOBOS experimentfor Au+Au collisions at $\sqrt{s_{NN}} = 130$ and 200 GeV. With the same set ofparameters, the Buda-Lund model describes also the transverse momentumdependence of $v_2$ of identified particles at mid-rapidity. The resultsconfirm the indication for quark deconfinement in Au+Au collisions at RHIC,obtained from a successful Buda-Lund hydro model fit to the single particlespectra and two-particle correlation data, as measured by the BRAHMS, PHOBOS,PHENIX and STAR collaborations.