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28 March 2024
 
  » arxiv » 1512.7070

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Statistical model analysis of hadron yields in proton-nucleus and heavy-ion collisions at SIS 18 energies
G. Agakishiev ; O. Arnold ; A. Balanda ; D. Belver ; A. Belyaev ; J. C. Berger-Chen ; A. Blanco ; M. Böhmer ; J. L. Boyard ; P. Cabanelas ; E. Castro ; S. Chernenko ; M. Destefanis ; F. Dohrmann ; A. Dybczak ; E. Epple ; L. Fabbietti ; O. Fateev ; P. Finocchiaro ; P. Fonte ; J. Friese ; I. Fröhlich ; T. Galatyuk ; J. A. Garzon ; R. Gernhäuser ; C. Gilardi ; K. Göbel ; M. Golubeva ; D. Gonzalez-Diaz ; F. Guber ; M. Gumberidze ; T. Heinz ; T. Hennino ; R. Holzmann ; A. Ierusalimov ; I. Iori ; A. Ivashkin ; M. Jurkovic ; B. Kämpfer ; T. Karavicheva ; I. Koenig ; W. Koenig ; B. W. Kolb ; G. Kornakov ; R. Kotte ; A. Krasa ; F. Krizek ; R. Krücken ; H. Kuc ; W. Kühn ; A. Kugler ; A. Kurepin ; V. Ladygin ; R. Lalik ; J. S. Lange ; S. Lang ; K. Lapidus ; A. Lebedev ; T. Liu ; L. Lopes ; M. Lorenz ; L. Maier ; A. Mangiarotti ; J. Markert ; V. Metag ; B. Michalska ; J. Michel ; E. Moriniere ; J. Mousa ; C. Müntz ; R. Münzer ; L. Naumann ; Y. C. Pachmayer ; M. Palka ; Y. Parpottas ; V. Pechenov ; O. Pechenova ; J. Pietraszko ; W. Przygoda ; B. Ramstein ; L. Rehnisch ; A. Reshetin ; A. Rustamov ; A. Sadovsky ; P. Salabura ; T. Scheib ; A. Schmah ; H. Schuldes ; E. Schwab ; J. Siebenson ; Yu. G. Sobolev ; S. Spataro ; B. Spruck ; H. Ströbele ; J. Stroth ; C. Sturm ; A. Tarantola ; K. Teilab ; P. Tlusty ; M. Traxler ; R. Trebacz ; H. Tsertos ; T. Vasiliev ; V. Wagner ; M. Weber ; C. Wendisch ; M. Wisniowski ; J. Wüstenfeld ; S. Yurevich ; Y. Zanevsky ;
Date 22 Dec 2015
AbstractThe 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 $T_{chem}=(99pm11)$ MeV and $mu_{b}=(619pm34)$ 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.
Source arXiv, 1512.7070
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