Freeze-out from HBT and Coulomb Effects

Abstract

The freeze-out of hot and dense hadronic matter formed in relativistic nuclear collisions is probed by HBT interferometry of identical pions, kaons, etc. Coulomb repulsion/attraction of positive/negative particles show up at small particle momenta and is also very sensitive to the freeze-out conditions. The source sizes and times freeze-out are extracted from ${\pi }^{-}/{\pi }^{+}$ spectra and HBT radii and compared.

Comments: 4 pages, proc. of QM'97, Tsukuba, Japan