Abstract
Recent Lattice QCD (LQCD) studies suggest that there are missing resonances in the strange sector of the Hadron Resonance Gas (HRG) model. By adopting the continuous Hagedorn mass spectrum, we present how different medium compositions influence the HRG predictions of conserved charge fluctuations. It is shown that missing strange resonances may be partially accounted for by applying the Hagedorn mass spectrum extracted from experimentally established hadrons. On the other hand, the strange-baryonic spectra, extracted from LQCD results for fluctuations, are found to be consistent with the unconfirmed states in the Particle Data Group (PDG) database, whilst the strange-mesonic spectrum points towards yet undiscovered states in the intermediate mass region.
Highlights
The confined phase of QCD, the theory of strong interactions, is commonly modeled with the Hadron Resonance Gas (HRG) [1]
We study whether the inclusion of the heavy resonances, by adopting the Hagedorn mass spectrum, can reduce or resolve the disparities between the HRG and Lattice QCD (LQCD) results on baryon-strangeness and strangeness fluctuations
Motivated by the recent Lattice QCD (LQCD) results on the baryon-strangeness correlations and strangeness fluctuations, which suggest the existence of unconfirmed resonances in the strange sector of the Hadron Resonance Gas (HRG), we compared the influence of different medium compositions on the HRG results
Summary
The confined phase of QCD, the theory of strong interactions, is commonly modeled with the Hadron Resonance Gas (HRG) [1]. The discrepancy in the strange-hadronic sector of HRG was attributed to missing resonances in the Particle Data Group (PDG) database [6]. We study whether the inclusion of the heavy resonances, by adopting the Hagedorn mass spectrum, can reduce or resolve the disparities between the HRG and LQCD results on baryon-strangeness and strangeness fluctuations.
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