Reconstructing the Source in Heavy Ion Collisions from Particle Interferometry

Hadronic oneand two-particle spectra provide for each particle species information about the phase-space distribution S(x,K) of the hadronic emission region [1]. Once reconstructed from the measured spectra, S(x,K) allows to distinguish between different dynamical scenarios of heavy ion collisions. It provides an experiment-based starting point for a dynamical back extrapolation into the hot and dense early stage of the collision, where quarks and gluons are expected to be the relevant physical degrees of freedom. Our reconstruction of S(x,K) is based on the hadronic oneand two-particle spectra