Measurements of π±, K±, p and p¯ spectra in 40Ar+45Sc collisions at 13A to 150A GeV/c

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2024-04, Vol.84 (4), p.416
• Main Authors: Adhikary, H., Allison, K. K., Andronov, E. V., Antićić, T., Bajda, M., Baszczyk, M., Bazgir, A., Bhosale, S., Bielewicz, M., Blondel, A., Bostan, N., Bryliński, W., Buryakov, M., Czopowicz, T., Dalmazzone, C., Davis, N., von Doetinchem, P., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Friend, M., Gaździcki, M., Golosov, O., Golovatyuk, V., Golubeva, M., Grebieszkow, K., Igolkin, S. N., Ivashkin, A., Izvestnyy, A., Kadija, K., Karpushkin, N., Kashirin, E., Kireyeu, V. A., Kitagawa, H., Kolev, D., Koshio, Y., Kozłowski, B., Krasnoperov, A., Kuich, M., László, A., Lykasov, G., Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Malakhov, A. I., Marcinek, A., Marino, A. D., Mathes, H.-J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A., Mik, Ł., Morozov, S., Naskręt, M., Nishimori, S., Ozvenchuk, V., Panova, O., Paolone, V., Pidhurskyi, I., Płaneta, R., Podlaski, P., Pórfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Puławski, S., Puzović, J., Renfordt, R., Ren, L., Reyna Ortiz, V. Z., Röhrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rumyantsev, M., Rybicki, A., Sakashita, K., Schmidt, K., Seryakov, A.Yu, Słodkowski, M., Stefanek, G., Stepaniak, J., Strikhanov, M., Swiderski, L., Szewiński, J., Taranenko, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Urbaniak, M., Valiev, F. F., Volkov, V., Wójcik, K., Wyszyński, O., Zaitsev, A., Zviagina, A., Zwaska, R.
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Collaboration; Collisions; Dynamic models; Elementary Particles; Energy; Hadrons; Heavy Ions; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Nuclear research; Particle production; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quarks; Regular Article - Experimental Physics; Spectra; String Theory; Transverse momentum
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-024-12602-2

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 ± , K ± , p and 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   Ge V / c . The analysis uses the 10% most central collisions, where the observed forward energy defines centrality. The energy dependence of the K ± / π ± ratios as well as of inverse slope parameters of the K ± 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.