Final state interactions in two-particle interferometry

Details Final state interactions in two-particle interferometry Final state interactions in two-particle interferometry

1997-10-22

arxiv.org/abs/nucl-th/9710051v1

Phys.Rev.C57:1428-1439,1998

Physics

Nuclear Physics

Nuclear Theory

12 pages RevTeX, 2 ps-figures included, submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.57.1428

We reconsider the influence of two-particle final state interactions (FSI) on two-particle Bose-Einstein interferometry. We concentrate in particular on the problem of particle emission at different times. Assuming chaoticity of the source, we derive a new general expression for the symmetrized two-particle cross section. We discuss the approximations needed to derive from the general result the Koonin-Pratt formula. Introducing a less stringent version of the so-called smoothness approximation we also derive a more accurate formula. It can be implemented into classical event generators and allows to calculate FSI corrected two-particle correlation functions via modified Bose-Einstein "weights".

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