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arXiv · 0712.4372

Source breakup dynamics in Au+Au Collisions at sqrt(s_NN)=200 GeV via three-dimensional two-pion source imaging

PHENIX Collaboration·S. Afanasiev
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Abstract

A three-dimensional (3D) correlation function obtained from mid-rapidity, low pT pion pairs in central Au+Au collisions at sqrt(s_NN)=200 GeV 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). Model comparisons to these distensions indicate a proper breakup time τ_0 ~ 9 fm/c and a mean proper emission duration Δτ~ 2 fm/c, leading to sizable emission time differences (<|Δτ_LCM |> ~ 12 fm/c), partly due to resonance decays. They also suggest an outside-in "burning" of the emission source reminiscent of many hydrodynamical models.

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PHENIX Collaboration, S. Afanasiev. 2007-12-28. Source breakup dynamics in Au+Au Collisions at sqrt(s_NN)=200 GeV via three-dimensional two-pion source imaging. https://doi.org/10.1103/physrevlett.100.232301

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