Report-no: SULDP-1994-5

Final State Interactions in Bose-Einstein Correlations and Source Functions

Authors: M. Biyajima, T. Mizoguchi and G. Wilk
Journal-ref: Z.Phys.C65:511-518,1995

We study the Bose-Einstein correlations (BEC) with the final state interactions (FSI) based on a framework of Bowler. Several new formulae including the FSI are utilized in analyses of data for pi+- pi+- production in e+e- annihilation by TPC, OPAL, DELPHI, and ALEPH Collaborations. Our results show that when the exponential and Gaussian distributions are used as the source functions the degree of coherence approaches approximately unity here. We analyse also data for K_S^0K_S^0 pairs at Z-pole in e+e- annihilation and show that within the present statistical errors there is no difference between the BEC for pions and kaons. Moreover, using the same formulae we obtain a fractional degree of coherence for the data for BEC in p + p collision by NA27 Collaboration.

Fulltext: PostScript [gzip'ed], PDF