Measurements of $\pi^\pm$, $K^\pm$, $p$ and $\bar{p}$ spectra in $^{40}$Ar+$^{45}$Sc collisions at 13$A$ to 150$A$ GeV/$c$

• DOI: 10.48550/arxiv.2308.16683
• Publication Date: 2023-01-01
• Authors: Collaboration, NA...; Adhikary, H.; Adrich, P.; Allison, K. K.; Amin, N.; Andronov, E. V.; Antićić, T.; Arsene, I. -C.; Bajda, M.; Balkova, Y.; Baszczyk, M.; Battaglia, D.; Bazgir, A.; Bhosale, S.; Bielewicz, M.; Blondel, A.; Bogomilov, M.; Bondar, Y.; Bostan, N.; Brandin, A.; Bryliński, W.; Brzychczyk, J.; Buryakov, M.; Camino, A. F.; Ćirković, M.; Csanád, M.; Cybowska, J.; Czopowicz, T.; Dalmazzone, C.; Davis, N.; Dmitriev, A.; von Doetinchem, P.; Dominik, W.; Dorosz, P.; Dumarchez, J.; Engel, R.; Feofilov, G. A.; Fields, L.; Fodor, Z.; Friend, M.; Gaździcki, M.; Golosov, O.; Golovatyuk, V.; Golubeva, M.; Grebieszkow, K.; Guber, F.; Igolkin, S. N.; Ilieva, S.; Ivashkin, A.; Izvestnyy, A.; Kadija, K.; Kargin, N.; Karpushkin, N.; Kashirin, E.; Kiełbowicz, M.; Kireyeu, V. A.; Kitagawa, H.; Kolesnikov, R.; Kolev, D.; Koshio, Y.; Kovalenko, V. N.; Kowalski, S.; Kozłowski, B.; Krasnoperov, A.; Kucewicz, W.; Kuchowicz, M.; Kuich, M.; Kurepin, A.; László, A.; Lewicki, M.; Lykasov, G.; Lyubushkin, V. V.; Maćkowiak-Pawłows...; Majka, Z.; Makhnev, A.; Maksiak, B.; Malakhov, A. I.; Marcinek, A.; Marino, A. D.; Mathes, H. -J.; Matulewicz, T.; Matveev, V.; Melkumov, G. L.; Merzlaya, A.; Mik, Ł.; Morawiec, A.; Morozov, S.; Nagai, Y.; Nakadaira, T.; Naskret, M.; Nishimori, S.; Ozvenchuk, V.; Panova, O.; Paolone, V.; Petukhov, O.; Pidhurskyi, I.; Płaneta, R.; Podlaski, P.; Popov, B. A.; Pórfy, B.; Posiadała-Zezula, M.; Prokhorova, D. S.; Pszczel, D.; Puławski, S.; Puzović, J.; Renfordt, R.; Ren, L.; Ortiz, V. Z. Reyna; Röhrich, D.; Rondio, E.; Roth, M.; Rozpłochowski, Ł.; Rumberger, B. T.; Rumyantsev, M.; Rustamov, A.; Rybczynski, M.; Rybicki, A.; Sakashita, K.; Schmidt, K.; Seryakov, A. Yu.; Seyboth, P.; Shah, U. A.; Shiraishi, Y.; Shukla, A.; Słodkowski, M.; Staszel, P.; Stefanek, G.; Stepaniak, J.; Strikhanov, M.; Ströbele, H.; Šuša, T.; Swiderski, L.; Szewiński, J.; Szukiewicz, R.; Taranenko, A.; Tefelska, A.; Tefelski, D.; Tereshchenko, V.; Toia, A.; Tsenov, R.; Turko, L.; Tveter, T. S.; Unger, M.; Urbaniak, M.; Valiev, F. F.; Veberič, D.; Vechernin, V. V.; Volkov, V.; Wickremasinghe, A.; Wójcik, K.; Wyszyński, O.; Zaitsev, A.; Zimmerman, E. D.; Zviagina, A.; Zwaska, R.
• Keywords: High Energy Physics - Experiment (hep-ex); FOS: Physical sciences; Nuclear Experiment (nucl-ex); Nuclear Experiment; High Energy Physics - Experiment

The NA61/SHINE experiment at the CERN Super Proton Synchrotron studies the onset of deconfinement in strongly interacting matter through a beam energy scan of particle production in collisions of nuclei of varied sizes. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions and mean multiplicities of $π^\pm$, $K^\pm$, $p$ and $\bar{p}$ produced in $^{40}$Ar+$^{45}$Sc collisions at beam momenta of 13$A$, 19$A$, 30$A$, 40$A$, 75$A$ and 150$A$~\GeVc. The analysis uses the 10\% most central collisions, where the observed forward energy defines centrality. The energy dependence of the $K^\pm$/$π^\pm$ ratios as well as of inverse slope parameters of the $K^\pm$ transverse mass distributions are placed in between those found in inelastic $p$+$p$ and central Pb+Pb collisions. The results obtained here establish a system-size dependence of hadron production properties that so far cannot be explained either within statistical or dynamical models.