$πΞ$ Correlations: an Interweaving of Resonance Interaction, Channel Coupling and Coulomb Effects

A method is presented for analysis of correlation function of two non-identical particles with strong and Coulomb interactions, resonance formation, channel coupling and spin structure. For resonance reactions we derive a formula giving the small distance contribution to the correlation function. The formalism is used to analyze the preliminary RHIC data on $π^{\pm} Ξ^{\mp}$ correlation measurements. The $Ξ^{*}(1530)$ resonance is successfully described. The $πΞ$ source size is obtained.

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