Measurement of $p$-$\Xi^{-}$ ($\bar{p}$-$\bar{\Xi}^{+}$) Correlation Function in Isobar and Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV with the STAR Detector

TL;DR

This paper reports measurements of proton-Xi correlation functions in heavy-ion collisions at 200 GeV, providing insights into hyperon-nucleon interactions relevant for nuclear matter and neutron star physics.

Contribution

It presents high-statistics correlation measurements in isobar and Au+Au collisions, extracting source sizes and interaction parameters using the Lednicky-Lyuboshitz model, which is novel for these collision systems.

Findings

Source sizes of $p$-$ar{ ext{Xi}}$ pairs were determined.

Strong interaction parameters for $p$-$ ext{Xi}$ were extracted.

Results contribute to understanding hyperon-nucleon interactions.

Abstract

Understanding the strong interactions between baryons, especially hyperon-nucleon ($Y$-$N$) interactions, is crucial for comprehending the equation-of-state (EoS) of the nuclear matter and inner structure of neutron star. In these proceedings, we present the measurements of $p$-$\Xi^{-}$ ($\bar{p}$-$\bar{\Xi}^{+}$) correlation functions with high statistics in Isobar (Ru+Ru, Zr+Zr) and Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV by the STAR experiment. With the Lednick\'y-Lyuboshitz approach, the source size and strong interaction parameters of $p$-$\Xi^{-}$ ($\bar{p}$-$\bar{\Xi}^{+}$) pairs are extracted.