2003/05/18 by I. G. Bearden, NA44 Collaboration, Bearden, I. G. +1
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Quantum Chromodynamics and Particle Interactions #Stochastic processes and statistical mechanics #nucl-ex
paper · pdf · doi:10.48550/arxiv.nucl-ex/0305014
4 pages, 3 eps figures, revtex4
arxiv created 2003/05/18 · openalex publication_date 2003/05/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
For central PbPb collisions at a center of mass energy of 17.3 GeV/nucleon we have made the first two-dimensional measurement of the pp correlation function. These data extend the range of previous studies of HBT radii by a factor of two in transverse mass. They are consistent with a hydrodynamic interpretation and microscopic models that include hadronic rescattering and transverse expansion. We also report new data on pion correlations. The two particle correlations of negative pions at a transverse mass of 0.92 GeV imply source radii that are smaller than typical hydrodynamic fits and transport model simulations. It is possible that these fast pions may have left the source before the build up of hydrodynamic flow.