/ nucl-ex arXiv:1512.07070

Statistical model analysis of hadron yields in proton-nucleus and heavy-ion collisions at SIS 18 energies

Agakishiev, G. (Dubna, JINR) ; Arnold, O. (COSM, Hampton) ; Balanda, A. (Jagiellonian U.) ; Belver, D. (Santiago de Compostela U.) ; Belyaev, A. (Dubna, JINR) ; Berger-Chen, J.C. (COSM, Hampton) ; Blanco, A. (LIP, Coimbra) ; Bohmer, M. (Munich, Tech. U.) ; Boyard, J.L. (Orsay) ; Cabanelas, P. (Santiago de Compostela U.) ; Castro, E. (Santiago de Compostela U.) ; Chernenko, S. (Dubna, JINR) ; Destefanis, M. (Giessen U.) ; Dohrmann, F. (Forschungszentrum Dresden Rossendorf) ; Dybczak, A. (Jagiellonian U.) ; Epple, E. (COSM, Hampton) ; Fabbietti, L. (COSM, Hampton) ; Fateev, O. (Dubna, JINR) ; Finocchiaro, P. (INFN, Catania) ; Fonte, P. (Coimbra Inst. Sup. Eng.) ; Friese, J. (Munich, Tech. U.) ; Frohlich, I. (Frankfurt U.) ; Galatyuk, T. (EMMI, Darmstadt) ; Garzon, J.A. (Santiago de Compostela U.) ; Gernhauser, R. (Munich, Tech. U.) ; Gilardi, C. (Giessen U.) ; Gobel, K. (Frankfurt U.) ; Golubeva, M. (Moscow, INR) ; Gonzalez-Diaz, D. (Darmstadt, Tech. Hochsch.) ; Guber, F. (Moscow, INR) ; Gumberidze, M. (EMMI, Darmstadt) ; Heinz, T. (Darmstadt, GSI) ; Hennino, T. (Orsay) ; Holzmann, R. (Darmstadt, GSI) ; Ierusalimov, A. (Dubna, JINR) ; Iori, I. (Milan U.) ; Ivashkin, A. (Moscow, INR) ; Jurkovic, M. (Munich, Tech. U.) ; Kampfer, B. (Dresden, Tech. U.) ; Karavicheva, T. (Moscow, INR) ; Koenig, I. (Darmstadt, GSI) ; Koenig, W. (Darmstadt, GSI) ; Kolb, B.W. (Darmstadt, GSI) ; Kornakov, G. (Darmstadt, Tech. Hochsch.) ; Kotte, R. (Forschungszentrum Dresden Rossendorf) ; Krasa, A. (Rez, Nucl. Phys. Inst.) ; Krizek, F. (Rez, Nucl. Phys. Inst.) ; Krucken, R. (Munich, Tech. U.) ; Kuc, H. (Orsay) ; Kuhn, W. (Giessen U.) ; Kugler, A. (Rez, Nucl. Phys. Inst.) ; Kurepin, A. (Moscow, INR) ; Ladygin, V. (Dubna, JINR) ; Lalik, R. (COSM, Hampton) ; Lange, J.S. (Giessen U.) ; Lang, S. (Darmstadt, GSI) ; Lapidus, K. (COSM, Hampton) ; Lebedev, A. (Moscow, ITEP) ; Liu, T. (Orsay) ; Lopes, L. (LIP, Coimbra) ; Lorenz, M. (Utrecht U.) ; Maier, L. (Munich, Tech. U.) ; Mangiarotti, A. (LIP, Coimbra) ; Markert, J. (Frankfurt U.) ; Metag, V. (Giessen U.) ; Michalska, B. (Jagiellonian U.) ; Michel, J. (Frankfurt U.) ; Moriniere, E. (Orsay) ; Mousa, J. (Cyprus U.) ; Muntz, C. (Frankfurt U.) ; Munzer, R. (COSM, Hampton) ; Naumann, L. (Forschungszentrum Dresden Rossendorf) ; Pachmayer, Y.C. (Frankfurt U.) ; Palka, M. (Jagiellonian U.) ; Parpottas, Y. (UC, Irvine) ; Pechenov, V. (Darmstadt, GSI) ; Pechenova, O. (Frankfurt U.) ; Pietraszko, J. (Darmstadt, GSI) ; Przygoda, W. (Jagiellonian U.) ; Ramstein, B. (Orsay) ; Rehnisch, L. (Frankfurt U.) ; Reshetin, A. (Moscow, INR) ; Rustamov, A. (Frankfurt U.) ; Sadovsky, A. (Moscow, INR) ; Salabura, P. (Jagiellonian U.) ; Scheib, T. (Frankfurt U.) ; Schmah, A. (LBL, Berkeley) ; Schuldes, H. (Frankfurt U.) ; Schwab, E. (Darmstadt, GSI) ; Siebenson, J. (Munich, Tech. U.) ; Sobolev, Yu. G. (Rez, Nucl. Phys. Inst.) ; Spataro, S. (INFN, Turin) ; Spruck, B. (Giessen U.) ; Strobele, H. (Frankfurt U.) ; Stroth, J. (Darmstadt, GSI) ; Sturm, C. (Darmstadt, GSI) ; Tarantola, A. (Frankfurt U.) ; Teilab, K. (Frankfurt U.) ; Tlusty, P. (Rez, Nucl. Phys. Inst.) ; Traxler, M. (Darmstadt, GSI) ; Trebacz, R. (Jagiellonian U.) ; Tsertos, H. (Cyprus U.) ; Vasiliev, T. (Dubna, JINR) ; Wagner, V. (Rez, Nucl. Phys. Inst.) ; Weber, M. (Munich, Tech. U.) ; Wendisch, C. (Darmstadt, GSI) ; Wisniowski, M. (Jagiellonian U.) ; Wustenfeld, J. (Forschungszentrum Dresden Rossendorf) ; Yurevich, S. (Darmstadt, GSI) ; Zanevsky, Y. (Dubna, JINR)

Abstract: 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.

Web-Page: http://inspirehep.net/record/1411081/files/arkcl_all_newerrors.png; http://inspirehep.net/record/1411081/files/yields_pNb_newerrors.png; http://inspirehep.net/record/1411081/files/diagramm_newerrors.png; http://inspirehep.net/record/1411081/files/arkcl_alapNb_yields.png; http://inspirehep.net/record/1411081/files/arXiv:1512.07070.pdf

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