English

Measurements of $p-\Lambda$ and $d-\Lambda$ correlations in 3 GeV Au+Au collisions at STAR

Nuclear Experiment 2024-01-02 v1 High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Theory

Abstract

Heavy-ion collisions provide a unique opportunity to explore nucleon-hyperon (N-Y) interactions through two-particle correlations. The pΛp-\Lambda and dΛd-\Lambda correlations shed light on both N-Y two-body and N-N-Y three-body interactions, which is crucial for understanding neutron star properties. We present the high precision measurement of pΛp-\Lambda and the first measurement of dΛd-\Lambda correlation with sNN=\sqrt{s_{_{\rm NN}}}= 3 GeV Au+Au collisions at STAR. Using the Lednicky-Lyuboshitz formalism, we characterized emission source size, the scattering length (f0f_0), and the effective range (d0d_0) of pΛp-\Lambda and dΛd-\Lambda interactions. Using the f0f_0 and d0d_0 extracted from two spin states in dΛd-\Lambda correlation, the parameters from the doublet state indicate the hypertriton binding energy is consistent with the current average of world measurements.

Keywords

Cite

@article{arxiv.2401.00319,
  title  = {Measurements of $p-\Lambda$ and $d-\Lambda$ correlations in 3 GeV Au+Au collisions at STAR},
  author = {Yu Hu},
  journal= {arXiv preprint arXiv:2401.00319},
  year   = {2024}
}

Comments

4 pages, 3 figures, Quark Matter 2023 (QM23) proceedings