Phase-space density in heavy-ion collisions revisited
Physics Department, McGill University, QC,H3A,2T8, Montreal, Canada
2 Computer Science Department, Concordia University, QC,H3G,1M8, Montreal, Canada
We derive the phase space density of bosons from a general boson interferometry formula. We find that the phase space density is connected with the two-particle and the single-particle density distribution functions. If the boson density is large, the two-particle density distribution function cannot be expressed as a product of two single-particle density distributions. However, if the boson density is so small that the two-particle density distribution function can be expressed as a product of two single-particle density distributions, then Bertsch's formula is recovered. For a Gaussian model, the effects of multi-particles Bose-Einstein correlations on the mean phase space density are studied.
© Springer-Verlag, 2003