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

0534044 - ÚJF 2021 RIV US eng J - Journal Article
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 … Total 124 authors
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
R&D Projects: GA MŠMT LTT17003; GA MŠMT EF16_013/0001677
Research Infrastructure: FAIR-CZ II - 90112
Institutional support: RVO:61389005
Keywords : HADES collaboration * heavy ion collisions
OECD category: Nuclear physics
Impact factor: 3.043, year: 2020
Method of publishing: 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.
Permanent Link: http://hdl.handle.net/11104/0312255