Influence of correlations between yields on the chemical freeze-out temperature

Abstract

A statistical (thermal) model is applied to the description of hadron yields measured at central nucleus-nucleus collisions at the top RHIC energy $\sqrt{s_{NN}}=200$ GeV and the LHC energy $\sqrt{s_{NN}}=2.76$ TeV. In contrast to the previous analyzes a more general form of the least squares test statistic is used, which takes into account also possible correlations between different species of yields. In addition to hadrons also light nuclei are included in the fits. Because of the lack of data, a toy model is constructed where the correlation coefficients are just free parameters. Because of this the presented considerations are speculative and should be treated as an imperfect illustration of the problem. Within these limitations it is impossible to formulate any definite conclusion, it might be only mentioned that for the considered examples the dependence of the freeze-out temperature and baryon chemical potential on correlations turned out to be weak.

11 pages, 4 figures, matches published version. arXiv admin note: text overlap with arXiv:1804.05691

References in corpus (10)

• Big-Bang Nucleosynthesis
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Decoding the phase structure of QCD via particle production at high energy
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Measurements of $\varphi$ meson production in relativistic heavy-ion collisions at RHIC
• Hadron yields and the phase diagram of strongly interacting matter
• Beam energy dependence of (anti-)deuteron production in Au+Au collisions at RHIC
• Production of ${}^4$He and ${}^4\overline{\text{He}}$ in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV at the LHC
• SHAREv2: fluctuations and a comprehensive treatment of decay feed-down
• What can we learn from fluctuations of particle ratios?