Abstract
We calculate the two-pion correlation function for an expanding hadronsource with a finite baryon density. The space–time evolution of thesource is described by relativistic hydrodynamics and theHanbury–Brown–Twiss (HBT) radius is extracted after effects ofcollective expansion and multiple scattering on the HBT interferometryhave been taken into account, using quantum probability amplitudes in apath-integral formalism. We find that this radius is substantiallysmaller than the HBT radius extracted from the freeze-out configuration.
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