A new Coulomb correction method for Bose-Einstein correlations,based on the π+π− correlation measurements

We present the measured correlation functions for π⁺π^?, π^?π^? and π⁺π⁺ pairs in central S+Ag collisions at 200 GeV per nucleon. The Gamov function, which has been traditionally used to correct the correlation functions of charged pions for the Coulomb interaction, is found to be inconsistent with all measured correlation functions. Certain problems which have been dominating the systematic uncertainty of the correlation analysis are related to this inconsistency. It is demonstrated that a new Coulomb correction method, based exclusively on the measured correlation function for π⁺π^? pairs, may solve the problem.