Phenomenological study of light (anti)nuclei, (anti)hypertriton and di-Lambda production at RHIC

TL;DR

This study uses a coalescence model to analyze the production of light (anti)nuclei, hypertriton, and di-Lambda in central Au+Au collisions at RHIC, aligning well with experimental data and thermal model predictions.

Contribution

It provides a detailed phenomenological analysis of light (anti)nuclei production at RHIC, including yield ratios and exponential reduction behavior, with predictions consistent with STAR measurements.

Findings

Invariant yields match STAR measurements.

Particle ratios agree with thermal models.

Production rate decreases exponentially with baryon number.

Abstract

We present the production of light (anti)nuclei, (anti)hypertriton and di-Lambda based on coalescence model in central Au+Au collisions at $\sqrt{s_{NN}}=200GeV$. The invariant yields of \He(\Hebar), \hypert(\hypertbar), \Hee(\Heebar) obtained is found to be consistent with the STAR measurements. The $p_{T}$ integrated yields for di-Lambda $dN_{\Lambda\Lambda}/dy \sim 2.23\times10^{-5}$, and is not strongly dependent on the parameter employed for coalescence process. Relative particle ratios of light anti(nuclei) and (anti)hypertriton are explored, and agree with experimental data and thermal model predictions quite well. An exponential reducion behavior is presented for the differential invariant yields with increased baryon number. The production rate reduces by a factor of 1692 (1285) for each additional antinucleon (nucleon) added to antinuclei (nuclei), and the production rate of \Libar is predicted to be $10^{-16}$ which is consistent with STAR result.