Coulomb corrections for Bose-Einstein correlations in whole momentum transfer region: Proposal of seamless fitting

We applied an improved Coulomb correction method developed by us recently to data on identical KK-pairs production in S + Pb and p + Pb reactions at 200 GeV/c obtained by NA44 Collaboration. To analyse the whole range of the momentum transfers measured the method of ”seamless fitting” has been proposed and used together with the asymptotic expansion formula for the Coulomb wave function. We found that such Coulomb corrections lead sometimes to different than previously reported (by NA44 Collaboration) interaction region and strongly influence the long range correlations. Preprint DPSU-95-4 (July, 1995) Introduction: Recently NA44 Collaboration has reported their data on the Bose-Einstein correlations (BEC) of K±K± pairs produced in S + Pb and p + Pb reactions at 200 GeV/c [1]. In our previous work [2] we have analysed these data by making use of the various source functions with the long range correlation (without, however, invoking any sort of Coulomb corrections). The data [1] have been corrected for Coulomb interactions by applying only the Gamow factor. As was pointed out some time ago by Bowler this is, however, not sufficient [3]. In our recent works [4, 5] the still improved method of Coulomb corrections was presented but not yet applied to any concrete data set. In the present Letter, we apply it therefore to the analysis of data for K±K± pairs production in S + Pb and p + Pb reactions e-mail: [email protected] e-mail: [email protected]