Charged-pion production in Au plus Au collisions at root s(NN)=2.4 GeV

0534044 - ÚJF 2021 RIV US eng J - Článek v odborném periodiku
Adamczewski-Musch, J. - Arnold, O. - Behnke, C. - Belounnas, A. - Chlad, Lukáš - Kugler, Andrej - Rodriguez Ramos, Pablo - Sobolev, Yuri, G. - Svoboda, Ondřej - Tlustý, Pavel - Wagner, Vladimír … celkem 124 autorů
Charged-pion production in Au plus Au collisions at root s(NN)=2.4 GeV.
European Physical Journal A. Roč. 56, č. 10 (2020), č. článku 259. ISSN 1434-6001. E-ISSN 1434-601X
Grant CEP: GA MŠMT LTT17003; GA MŠMT EF16_013/0001677
Výzkumná infrastruktura: FAIR-CZ II - 90112
Institucionální podpora: RVO:61389005
Klíčová slova: HADES collaboration * heavy ion collisions
Obor OECD: Nuclear physics
Impakt faktor: 3.043, rok: 2020
Způsob publikování: Open access
https://doi.org/10.1140/epja/s10050-020-00237-2

We present high-statistic data on charged-pion emission from Au + Au collisions at root s(NN) = 2.4GeV = 2.4 GeV (corresponding to E-beam = 1.23A GeV) in four centrality classes in the range 0-40% of the most central collisions. The data are analyzed as a function of transverse momentum, transverse mass, rapidity, and polar angle. Pion multiplicity per participating nucleon decreases moderately with increasing centrality. The polar angular distributions are found to be non-isotropic even for the most central event class. Our results on pion multiplicity fit well into the general trend of the available world data, but undershoot by 2.5 sigma data from the FOPI experiment measured at slightly lower beam energy. We compare our data to state-of-the-art transport model calculations (PHSD, IQMD, PHQMD, GiBUU and SMASH) and find substantial differences between the measurement and the results of these calculations.
Trvalý link: http://hdl.handle.net/11104/0312255