Measured correlation function of \XiPi pairs. Statistical (bars) and systematic (boxes) uncertainties are shown separately. The pink band represents the fit with both Coulomb and strong interactions via the LL approach, while the green band indicates the Coulomb-only results. The $C_\mathrm{background} (\kstar)$ within the Coulomb + strong fit is reported in gray. The inset shows a zoomed-in view of the y-axis, highlighting the \ks region of the \XRes and \XResNovanta states in greater detail. The lower panel presents the difference between the data and the modeled correlation functions using Coulomb and strong interactions (pink) and Coulomb only (green) expressed as the number of standard deviations, n$\sigma$.