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We present a realistic expanding source model with nine parameters that arenecessary and sufficient to describe the main physics occuring duringhydrodynamical freezeout of the excited hadronic matter produced inrelativistic heavy-ion collisions. As a first test of the model, we compare itto data from central Si + Au collisions at p_lab/A = 14.6 GeV/c measured inexperiment E-802 at the AGS. An overall chi-square per degree of freedom of1.055 is achieved for a fit to 1416 data points involving invariant pi^+, pi^-,K^+, and K^- one-particle multiplicity distributions and pi^+ and K^+two-particle correlations. The 99-percent-confidence region of parameter spaceis identified, leading to one-dimensional error estimates on the nine fittedparameters and other calculated physical quantities. Three of the mostimportant results are the freezeout temperature, longitudinal proper time, andbaryon density along the symmetry axis. For these we find values of 92.9 +/-4.4 MeV, 8.2 +/- 2.2 fm/c, and 0.0222 + 0.0096 / - 0.0069 fm^-3, respectively.

physical review. c. nuclear physics/physical review. c, nuclear physics

Realistic expanding source model for invariant one-particle multiplicity distributions and two-particle correlations in relativistic heavy-ion collisions