HBT in Relativisitic Heavy Ion Collisions
Michael Murray
Abstract
A summary of current interferometry data in relativistic heavy ions is presented. At sqrts=17GeV a sudden increase in the pion source volume is observed for central PbPb collisions. This seems to imply that the pion phase density has reached a limit. The source size of different particles decreases with mass when the transverse velocity is held constant but increases with mass when the transverse mass is held constant. The antiproton source radius is larger than the proton source radius. So far no long lived source has been seen. The pion source size varies slowly with rapidity but more rapidly with transverse mass implying strong transverse flow. There is very slow increase of pion radii with sqrts.
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