The Decoupling Problem at RHIC

Abstract

We investigate whether it is possible to dynamically generate from classical transport theory the observed surprising Rout ~ Rside in Au+Au at s^1/2 = 130A GeV at RHIC. We obtained covariant solutions to the Boltzmann transport equation via the MPC technique, for a wide range of partonic initial conditions and opacities. We demonstrate that there exist transport solutions that yield a freezeout distribution with Rout < Rside for Kperp > ~ 1.5 GeV. These solutions correspond to continuous evaporation-like freezeout, where the emission duration is comparable to the source size. Naively this would mean Rout > Rside. Nevertheless, our sources exhibit Rout < Rside because they are narrower in the 'out' than in the 'side' direction and, in addition, a positive x_out-t correlation develops reducing Rout further.

Talk given at the Budapest 2002 Intl. Workshop on "Quark and hadron dynamics in relativistic heavy-ion collisions", March 3-7, 2002, Budapest, Hungary. To appear in proceedings. LaTeX source + 4 EPS figures

References in corpus (7)

• Saturation of Elliptic Flow and the Transport Opacity of the Gluon Plasma at RHIC
• Early thermalization at RHIC
• Pion Interferometry of $\sqrt{s_{NN}}=130$ GeV Au+Au Collisions at RHIC
• Transverse mass dependence of two-pion correlations in Au+Au collisions at sqrt(s_NN) = 130 GeV
• Pion Interferometry at RHIC: Probing a thermalized Quark-Gluon-Plasma?
• The effect of finite-range interactions in classical transport theory
• Elliptic flow in Au+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 130 GeV

Cited by in corpus (3)

• Bose-Einstein correlations of pion pairs in central Pb+Pb collisions at CERN SPS energies
• Signals in Single-Event Pion Interferometry for Granular Sources of Quark-Gluon Plasma Droplets
• Signature of Granular Structures by Single-Event Intensity Interferometry