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

SYSNO ASEP	0461373
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Statistical hadronization model analysis of hadron yields in p plus Nb and Ar plus KCl at SIS18 energies
Author(s)	Agakishiev, G. (RU) Arnold, O. (DE) Balanda, A. (PL) Belver, D. (ES) Krása, Antonín (UJF-V) Křížek, Filip (UJF-V)_{RID, ORCID, SAI} Kugler, Andrej (UJF-V)_{RID, ORCID, SAI} Sobolev, Yuri, G. (UJF-V)_ORCID Tlustý, Pavel (UJF-V)_{ORCID, SAI} Wagner, Vladimír (UJF-V)_{RID, ORCID, SAI}
Number of authors	112
Source Title	European Physical Journal A. - : Springer - ISSN 1434-6001 Roč. 52, č. 6 (2016), s. 178
Number of pages	10 s.
Publication form	Print - P
Language	eng - English
Country	US - United States
Keywords	heavy ion collisions ; hyperon production ; matter
Subject RIV	BG - Nuclear, Atomic and Molecular Physics, Colliders
R&D Projects	LC07050 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UJF-V - RVO:61389005
UT WOS	000379118400004
EID SCOPUS	84977637667
DOI	10.1140/epja/i2016-16178-x
Annotation	The HADES data from p + Nb collisions at a center-of-mass energy of root s(NN) = 3.2 GeV are analyzed employing a statistical hadronization model. The model can successfully describe the production yields of the identified hadrons pi(0), eta, Lambda, K-s(0), omega with parameters T-chem = (99 +/- 11) MeV and mu(b) = (619 +/- 34) MeV, which fit well into the chemical freeze-out systematics found in heavy-ion collisions. In addition, we reanalyze our previous HADES data from Ar + KCl collisions at root s(NN) = 2.6 GeV with an updated version of the 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 as a function of colliding energy and system size. Despite its success, the model fails to describe the observed Xi(-) yields in both, p + Nb and Ar + KCl. Special emphasis is put on feed-down contributions from higher-lying resonance states as a possible explanation for the observed excess.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2017

Number of the records: 1