Measurements of p-Λ and d-Λ correlations in 3 GeV Au+Au collisions at STAR

2023/12/30 by Y. Hu, Hu, Yu · 1 citation
Physics and Astronomy · Mathematics · Economics, Econometrics and Finance · #High-Energy Particle Collisions Research #Statistical Methods and Bayesian Inference #Spatial and Panel Data Analysis

paper · pdf · doi:10.48550/arxiv.2401.00319

Abstract

Heavy-ion collisions provide a unique opportunity to explore nucleon-hyperon (N-Y) interactions through two-particle correlations. The p-Λ and d-Λ 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 p-Λ and the first measurement of d-Λ correlation with √s__{\rm NN}= 3 GeV Au+Au collisions at STAR. Using the Lednicky-Lyuboshitz formalism, we characterized emission source size, the scattering length (f₀), and the effective range (d₀) of p-Λ and d-Λ interactions. Using the f₀ and d₀ extracted from two spin states in d-Λ correlation, the parameters from the doublet state indicate the hypertriton binding energy is consistent with the current average of world measurements.

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