The reconstructed final state of Au + Au collisions from PHENIX and STAR data at sqrt{s}=130 AGeV - indication for quark deconfinement at RHIC

Abstract

The final state of Au + Au collisions at sqrt{s}=130 AGeV at RHIC has been reconstructed within the framework of the Buda-Lund hydrodynamical model, by performing a simultaneous fit to final data on two-particle Bose-Einstein correlations of the STAR and PHENIX Collaborations, and final identified single particle spectra as measured by the PHENIX Collaboration. The results indicate a strongly three-dimensional expansion with a four-velocity field that is almost a spherically symmetric Hubble flow. We find large transverse geometrical source sizes, R_G = 9.8 +- 1.2 fm, a relatively short mean freeze-out time of tau0 = 6.1 +- 0.3 fm/c and a short duration of particle emission, Delta_tau = 0.02 +- 1.5 fm/c. Most strikingly, we find an indication for a hot central part or the hydrodynamically evolving core, characterized by a central temperature of T0 = 202 +- 13 MeV, that is close to (or even above) the deconfinement temperature of the quark-hadron phase transition. The best fit indicates a cold surface temperature of T_s = 110 +- 16 MeV. When the possibility of the hot center is excluded, the confidence level of the fit decreases from 28.9 % to 1.2 %. Predictions are made for the rapidity dependence of the slope parameters, for the transverse mass dependence of the rapidity-width of the single-particle spectra, and for the transverse velocity dependence of the non-indentical particle correlations.

18 pages, 3 eps figures, based on the talk of A. Ster at the Budapest 02 workshop on Quark and Hadron Dynamics, budapest1.sty

References in corpus (13)

• Pseudorapidity distributions of charged particles from Au+Au collisions at the maximum RHIC energy, Sqrt(s_NN) = 200 GeV
• Pion Interferometry of $\sqrt{s_{NN}}=130$ GeV Au+Au Collisions at RHIC
• Description of the RHIC p_T-spectra in a thermal model with expansion
• Transverse mass dependence of two-pion correlations in Au+Au collisions at sqrt(s_NN) = 130 GeV
• Strange particle production at RHIC in a single-freeze-out model
• Two-kaon correlations in central Pb + Pb collisions at 158 A GeV/c
• Simple solutions of fireball hydrodynamics for self-similar elliptic flows
• Inflation of fireballs, the gluon wind and the homogeneity of the HBT radii at RHIC
• New form of matter at CERN SPS: Quark Matter but not Quark Gluon Plasma
• Lattice QCD results at finite T and μ
• Particle interferometry, binary sources and oscillations in two-particle correlations
• Modelling correlations in heavy ion collisions
• Single particle inclusive spectra, HBT and elliptic flow; a consistent picture at RHIC?

Cited by in corpus (6)

• Buda-Lund hydro model for ellipsoidally symmetric fireballs and the elliptic flow at RHIC
• Indication of quark deconfinement and evidence for a Hubble flow in 130 and 200 GeV Au+Au collisions
• Phase conversion in a weakly first-order quark-hadron transition
• Review of HBT or Bose-Einstein correlations in high energy heavy ion collisions
• HBT: A (mostly) experimental overview
• Hubble's Law in Heavy Ion Collisions