Source Breakup Dynamics in Au+Au Collisions at sNN=200GeV via Three-Dimensional Two-Pion Source Imaging

S. Afanasiev et al. (PHENIX Collaboration)
Phys. Rev. Lett. 100, 232301 – Published 13 June 2008

Abstract

A three-dimensional correlation function obtained from midrapidity, low pT, pion pairs in central Au+Au collisions at sNN=200GeV is studied. The extracted model-independent source function indicates a long range tail in the directions of the pion pair transverse momentum (out) and the beam (long). A proper breakup time τ09fm/c and a mean proper emission duration Δτ2fm/c, leading to sizable emission time differences (|ΔtLCM|12fm/c), are required to allow models to be successfully matched to these tails. The model comparisons also suggest an outside-in “burning” of the emission source reminiscent of many hydrodynamical models.

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  • Received 28 December 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.232301

©2008 American Physical Society

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Vol. 100, Iss. 23 — 13 June 2008

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