Coulomb wave function correction including momentum resolution for charged hadron pairs: Analysis of data for π+π- pair production in p+ Ta reaction at 70 GeV/c

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We propose a new method for the Coulomb wave function correction including the momentum resolution for charged hadron pairs and apply it to the precise data on π+π- correlations obtained in p + Ta reaction at 70 GeV/c. It is found that interaction regions of this reaction (assuming Gaussian source function) are 5.6 ± 3.0 and 4.4 ± 2.6 fm for the thicknesses of the target 8 and 1.4 microns, respectively. The physical picture of the source size obtained in this way is discussed.