https://doi.org/10.1140/epjc/s10052-021-09135-3
Regular Article - Experimental Physics
Spectra and mean multiplicities of 
in central
Ar+
Sc collisions at 13A, 19A, 30A, 40A, 75A and 150
beam momenta measured by the NA61/SHINE spectrometer at the CERN SPS
NA61/SHINE Collaboration
1
National Nuclear Research Center, Baku, Azerbaijan
2
Faculty of Physics, University of Sofia, Sofia, Bulgaria
3
Ruđer Bošković Institute, Zagreb, Croatia
4
LPNHE, University of Paris VI and VII, Paris, France
5
Karlsruhe Institute of Technology, Karlsruhe, Germany
6
University of Frankfurt, Frankfurt, Germany
7
Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Budapest, Hungary
8
University of Bergen, Bergen, Norway
9
Jan Kochanowski University in Kielce, Kielce, Poland
10
Institute of Nuclear Physics, Polish Academy of Sciences, Kraców, Poland
11
National Centre for Nuclear Research, Warsaw, Poland
12
Jagiellonian University, Kraców, Poland
13
AGH-University of Science and Technology, Kraców, Poland
14
University of Silesia, Katowice, Poland
15
University of Warsaw, Warsaw, Poland
16
University of Wrocław, Wrocław, Poland
17
Warsaw University of Technology, Warsaw, Poland
18
Institute for Nuclear Research, Moscow, Russia
19
Joint Institute for Nuclear Research, Dubna, Russia
20
National Research Nuclear University (Moscow Engineering Physics Institute), Moscow, Russia
21
St. Petersburg State University, St. Petersburg, Russia
22
University of Belgrade, Belgrade, Serbia
23
University of Geneva, Geneva, Switzerland
24
Fermilab, Batavia, USA
25
University of Colorado, Boulder, USA
26
University of Pittsburgh, Pittsburgh, USA
Received:
22
January
2021
Accepted:
9
April
2021
Published online:
7
May
2021
The physics goal of the strong interaction program of the NA61/SHINE experiment at the CERN Super Proton Synchrotron (SPS) is to study the phase diagram of hadronic matter by a scan of particle production in collisions of nuclei with various sizes at a set of energies covering the SPS energy range. This paper presents differential inclusive spectra of transverse momentum, transverse mass and rapidity of mesons produced in centralAr+Sc collisions at beam momenta of 13A, 19A, 30A, 40A, 75A and 150. Energy and system size dependence of parameters of these distributions – mean transverse mass, the inverse slope parameter of transverse mass spectra, width of the rapidity distribution and mean multiplicity – are presented and discussed. Furthermore, the dependence of the ratio of the mean number of produced pions to the mean number of wounded nucleons on the collision energy was derived. The results are compared to predictions of several models.
© The Author(s) 2021
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