WPCF 2023 - XVI Workshop on Particle Correlations and Femtoscopy & IV Resonance Workshop 2023

Measurements of pp,p\Lambda,p\Xi^- Correlation Functions at 3GeV Au+Au Collisions at RHIC-STAR

10 Nov 2023, 12:00

15m

Contributed Day 5 - Morning

Speaker

Zhi Qin (Tsinghua University)

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 $pp$, $p\mathrm{\Lambda }$, $p{\mathrm{\Xi }}^{-}$ 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.

Presentation materials

WPCF2023_ZhiQin_pL_dL_talk_v2.pdf