Extracting Source Parameters from Gaussian Fits to Two-Particle Correlations

Details Extracting Source Parameters from Gaussian Fits to Two-Particle Correlations Extracting Source Parameters from Gaussian Fits to Two-Particle Correlations

1995-05-22

arxiv.org/abs/nucl-th/9505032v3

Phys.Rev.C52:2694-2703,1995

Physics

Nuclear Physics

Nuclear Theory

28 pages, RevTeX 3.0. Submitted to Physical Review C. Postscript version available at http://t2.lanl.gov/pub/publications/publ

Scientific paper

10.1103/PhysRevC.52.2694

Using a quadratic saddle-point approximation, we show how information about a particle-emitting source can be extracted from gaussian fits to two-particle correlation data. Although the formalism is completely general, extraction of the relevant parameters is much simpler for sources within an interesting class of azimuthally symmetric models. After discussing the standard fitting procedure, we introduce a new gaussian fitting procedure which is an azimuthally symmetric generalization of the Yano-Koonin formalism for spherically symmetric sources. This new fitting procedure has the advantage that in addition to being able to measure source parameters in a fixed frame or the longitudinally co-moving system, it can also measure these parameters in the local rest frame of the source.

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