How to extract physics from HBT radius parameters

I review recent progress in the understanding of the connection between the space-time structure of the particle emitting source and the form of the two-particle correlation function in momentum space. Based on a new scheme for calculating the HBT radius parameters from the emission function, strategies are suggested to separate for rapidly expanding sources the information on the spatial and temporal structure of the source. To this end a new fitting function for the two-particle correlation function is proposed. Its usefulness is demonstrated for a typical expanding model source, and it is shown how the dependence of the resulting fit parameters on the momentum of the particle pair can be used to measure the longitudinal and transverse expansion of the source.

Note:

14 pages, 5 figures, LaTeX (qm96.sty included). Invited talk presented at Quark Matter 96, Heidelberg, 20.-24.5.96 Report-no: TPR-96-17

talk: Heidelberg 1996/05/20
nucleus nucleus: nuclear reaction
nuclear reaction: model
nuclear reaction: space-time
correlation function: two-particle
mass: transverse
rapidity
pi: pair production
numerical calculations

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