Abstract
A three-dimensional correlation function obtained from midrapidity, low , pion pairs in central collisions at 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 and a mean proper emission duration , leading to sizable emission time differences (), 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.
- Received 28 December 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.232301
©2008 American Physical Society