Statistical hadronization model analysis of hadron yields in p + Nb and Ar + KCl at SIS18 energies

HADES collaboration (110 authors); Blanco, A.; Fonte, P.; Lopes, L.; Mangiarotti, A.

http://hdl.handle.net/10400.26/27001

Use this identifier to reference this record.

Name:	Description:	Size:	Format:
1.pdf		397.76 KB	Adobe PDF	Download

Send Feedback

Authors

HADES collaboration (110 authors)

Abstract(s)

The HADES data from p+Nb collisions at center of mass energy of $\sqrt{s_{NN}}$= 3.2 GeV are analyzed by employing a statistical model. Accounting for the identified hadrons $\pi^0$, $\eta$, $\Lambda$, $K^{0}_{s}$, $\omega$ allows a surprisingly good description of their abundances with parameters $T_{chem}=(99\pm11)$ MeV and $\mu_{b}=(619\pm34)$ MeV, which fits well in the chemical freeze-out systematics found in heavy-ion collisions. In supplement we reanalyze our previous HADES data from Ar+KCl collisions at $\sqrt{s_{NN}}$= 2.6 GeV with an updated version of the statistical model. We address equilibration in heavy-ion collisions by testing two aspects: the description of yields and the regularity of freeze-out parameters from a statistical model fit. Special emphasis is put on feed-down contributions from higher-lying resonance states which have been proposed to explain the experimentally observed $\Xi^-$ excess present in both data samples.