More uses for thermal models

Abstract We explore combinations of particle and anti-particle yields which can be used to test thermal models in a parameter free way. We also explore combinations which can be used to extract $$\mu _B/T$$ μ B / T , $$\mu _S/T$$ μ S / T and $$\mu _Q/T$$ μ Q / T . We use experimentally measured particle-antiparticle specific ratios for proton p , Lambda $$\Lambda $$ Λ , and cascade $$\Xi $$ Ξ , for $$\sqrt{s_{NN}}=$$ s NN = 7.7–39 GeV from RHIC BES phase-1 to extract the $$\mu _{B,S,Q}/T$$ μ B , S , Q / T . These compared well with published STAR freeze-out parameters. These combinations are verified to predict a similar combination of $$\Omega $$ Ω yields. We also extend this idea to predict (anti-)nuclei yields at energies where they are not measured. We also update parametrizations for the $$\sqrt{s_{NN}}$$ s NN dependence of freeze-out parameters T and $$\mu _B$$ μ B , and present for the first time a similar parametrization of $$\mu _S$$ μ S .