Femtoscopy study of $\pi^-\Lambda$ and $K^-p$ interactions

TL;DR

This paper models meson-baryon interactions in the strangeness sector using a unitarized chiral approach, predicting correlation functions that match experimental data and aiding understanding of strong force interactions.

Contribution

It introduces a unitarized chiral interaction model up to next-to-leading order for meson-baryon correlations in the strangeness $S=-1$ sector, with preliminary results for $ ext{pi}^- ext{Lambda}$ and $ ext{K}^- ext{p}$ interactions.

Findings

The model reproduces $ ext{K}^- ext{p}$ correlation data within $2\sigma$.

Preliminary $ ext{pi}^- ext{Lambda}$ correlation results are presented.

The approach does not require adjusting coupled-channel interactions to fit data.

Abstract

We have calculated the femtoscopic correlation functions of meson-baryon pairs in the strangeness $S=-1$ sector, employing a unitarized chiral interaction model up to next-to-leading order. We will show preliminary results for the $\pi^-\Lambda$ correlation function, which is presently under analysis by the ALICE@LHC collaboration. We will also demonstrate that, within $2\sigma$, the employed interaction is perfectly capable of reproducing the $K^-p$ correlation function data measured by the same collaboration, without the need of changing the coupled-channel interactions, as has been suggested recently.