$K^-p$ Correlation Function from High-Energy Nuclear Collisions and Chiral SU(3) Dynamics

TL;DR

This paper calculates the K^-p correlation function in high-energy nuclear collisions using a coupled-channels approach based on chiral SU(3) dynamics, successfully reproducing experimental data and providing insights into the KbarN interaction.

Contribution

It introduces a comprehensive coupled-channels framework including Coulomb effects and threshold differences, utilizing chiral SU(3) potentials to analyze K^-p correlations.

Findings

The correlation function matches experimental data with adjustable source parameters.

Predicted larger-system correlations can help constrain the KbarN interaction.

The approach accounts for all coupled channels and Coulomb effects simultaneously.

Abstract

The two-particle momentum correlation function of a K^-p pair from high-energy nuclear collisions is evaluated in the KbarN-piSigma-piLambda coupled-channels framework. The effects of all coupled channels together with the Coulomb potential and the threshold energy difference between K^-p and Kbar0 n are treated completely for the first time. Realistic potentials based on the chiral SU(3) dynamics are used which fit the available scattering data. The recently measured correlation function is found to be well reproduced by allowing variations of the source size and the relative weight of the source function of piSigma with respect to that of KbarN. The predicted K^-p correlation function from larger systems, which is less affected by the piSigma source function, indicates that the investigation of its source size dependence is useful in providing further constraints in the study of the KbarN interaction.