p-$\Sigma^+$ correlation function in high-multiplicity triggered pp collisions at $\sqrt{s}=13$ TeV. The statistical uncertainties are drawn as bars and the systematic ones as boxes. The data points are shifted to the center of gravity of the mixed-event distribution. The data points show the measurement, containing both the genuine contribution as well as the contributions from feed-down and misidentification. The model calculations are weighted by the genuine $\lambda$ parameter and smeared by the momentum resolution to allow a comparison with data. Left: Correlation function with several model calculations using the full wave functions and the effective Gaussian parametrization of the source. The uncertainty bands arise from the uncertainty of the source size. Right: Decomposition of the theoretical correlation functions into the singlet (dashed lines) and triplet (dash-dotted lines) contributions. The contributions are multiplied by their statistical weights and added to the Coulomb-only function scaled by 1 – ji, which illustrates the influence of the given contribution on the total correlation function (solid lines).