Speaker
Description
Two particle correlation function in heavy ion collisions mainly depends on the phase space of the emitting source, and the final-state interactions. So it is widely used to investigate the source size after collision, and also provide an effective experimental approach to study the nucleon-nucleon and hyperon-nucleon interactions, which are crucial to understand the inner structure of compact stars.
In this work, we will present the results of baryon correlation functions for the pairs of $pp$, $p\Lambda$, $p\Xi^-$ in Au+Au collisions at$\sqrt{s_{NN}}= 3\ \mathrm{GeV}$ recorded by the fixed target program at STAR. The correlation functions are obtained after corrections for purity and feed-down effects and considering momentum resolution, track merging and splitting effects. The source size $r_G$ of different pairs for different centrality and strong interaction parameters scattering length $f_0$ and effective range $d_0$ of the pairs are extracted. UrQMD and CRAB models are used to calculate the correlation function theoretically to compare with the experimental result.
