Quark Matter 2025

Baryon-Strangeness Correlations in Au+Au Collisions at RHIC-STAR

9 Apr 2025, 09:20

20m

HZ 6 (Goethe University Frankfurt, Campus Westend, Hörsaalzentrum)

Oral QCD phase diagram & critical point Parallel session 30

Speaker

HANWEN Feng (Central China Normal University)

Description

Fluctuations and correlations of conserved charges serve as sensitive observables for investigating QCD thermodynamics. In particular, baryon-strangeness correlations may offer insights on changing degrees of freedom carrying strangeness.

In this work, we present the measurements of baryon-strangeness correlations in Au+Au collisions from the beam energy scan program (BESI and BESII, 7.7-62.4 GeV) at STAR. This analysis includes newly analyzed datasets, marking the systematic investigation of the collision energy and centrality dependence of baryon-strangeness correlations. The study includes strange hadrons $K^{+}$, $\mathrm{\Lambda }$, and ${\mathrm{\Xi }}^{-}$ along with their anti-particles. Physics implications will be discussed by comparing these new results with calculations from lattice gauge theory, functional renormalization group, hadron resonance gas model, as well as hadronic transport model.

Presentation materials

hwfeng_qm2025.pdf