2019
DOI: 10.1103/physrevc.99.055207
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Balance of attractive and repulsive hadronic interactions: The influence of hadronic spectrum and excluded-volume effects on lattice thermodynamics, and consequences for experiments

Abstract: Repulsive hadronic interactions play a relevant role in the QCD dynamics, attractive ones being represented by resonance formation. In this study we propose different schemes in order to parameterise repulsive interactions, then being able to extract effective sizes of hadrons from fits to lattice QCD simulations. We find that allowing a difference between the strange and light sectors, strange particles are systematically smaller than light ones with equal mass. The very simple implementation of repulsive int… Show more

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Cited by 6 publications
(16 citation statements)
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“…The small value of r p in the 1b scheme leads to negligible effects on the fit of the hadron yields, and indeed in this case the results are very close to the I -HRG ones. In the 2b scheme there is a notable improvement, which is related to the different EV interactions for strange and non-strange hadrons with the introduction of an additional free parameter r Λ for all strange particles; here we have the non trivial result of smaller strange states with respect to light ones with equal mass (r Λ < r p ), which is compatible with what is found from fits to lattice QCD [19]. With respect to the 2b scheme, the 4b one introduces a meson-baryon difference with 4 free parameters: r π , r K , r p , and r Λ ; this leads to an even more essential improvement of the quality of the fit.…”
Section: Central Pb+pb Collisions At Alicesupporting
confidence: 84%
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“…The small value of r p in the 1b scheme leads to negligible effects on the fit of the hadron yields, and indeed in this case the results are very close to the I -HRG ones. In the 2b scheme there is a notable improvement, which is related to the different EV interactions for strange and non-strange hadrons with the introduction of an additional free parameter r Λ for all strange particles; here we have the non trivial result of smaller strange states with respect to light ones with equal mass (r Λ < r p ), which is compatible with what is found from fits to lattice QCD [19]. With respect to the 2b scheme, the 4b one introduces a meson-baryon difference with 4 free parameters: r π , r K , r p , and r Λ ; this leads to an even more essential improvement of the quality of the fit.…”
Section: Central Pb+pb Collisions At Alicesupporting
confidence: 84%
“…(8) is assumed for all hadrons, with a common α parameter. Note that the same schemes have already been studied for pure gauge theories [38] and lattice QCD simulations [19].…”
Section: Central Pb+pb Collisions At Alicementioning
confidence: 99%
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