Additional strange resonances from Lattice QCD

TL;DR

This paper explores how incorporating a continuous Hagedorn mass spectrum into the Hadron Resonance Gas model can account for missing strange resonances suggested by Lattice QCD studies, highlighting potential undiscovered states.

Contribution

It demonstrates that the Hagedorn spectrum can partially explain missing strange resonances and aligns LQCD fluctuation data with unconfirmed and undiscovered hadronic states.

Findings

Hagedorn spectrum accounts for missing strange resonances.

LQCD fluctuations align with unconfirmed PDG states.

Evidence suggests undiscovered strange mesonic states.

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.