Quark Matter 2005 Conference   Quark Matter 2005 Conference


The RHIC HBT Puzzle, Chiral Symmetry Restoration, and Pion Opacity

Presenting Author: Prof. John G. Cramer

Author(s): John G. Cramer and Gerald A. Miller

Abstract:

We present a resolution of the RHIC HBT Puzzle, a relativistic quantum wave-mechanical treatment of the opacity and refractive effects of pions emerging from a hot dense expanding source. The model assumes that the initial medium achieves partial chiral symmetry restoration, which produces a very deep momentum-dependent complex potential. The Klein-Gordon equation with Bjorken-cylinder geometry is solved for distorted waves representing the emerging pions. These waves are combined with a hydro-inspired pion source function to predict HBT radii and pion spectra. The model has acheieved excellent HBT radii and spectrum fits to RHIC sqrt(s_NN)=200 GeV Au+Au data from STAR and to CERN Pb+Pb data from NA49, reproducing the observed small source sizes, Ro/Rs~1, and the low-momentum behavior of the radii. The calculations represent a new tool for investigating the presence and characteristics of chiral symmetry restoration in heavy ion collisions.

Attached papers on John G. Cramer's Home Page

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