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Al-Turany, M.; Aleksandrov, D.; Andreou, D.; Anguelov, V.; Aphecetche, L.; Badalà, A.; Baral, R. C.; Baruffaldi, F.; Batigne, G.; Batyunya, B.; Beole, S.; Berdnikov, Y.; Bhatt, H.; Blume, C.; Bock, F.; Bolozdynya, A.; Bossi, H.; Bregant, M.; Buthelezi, Z.; Caliva, A.; Chibante Barroso, V.; Collu, A.; Conesa Balbastre, G.; Dainese, A.; Damas, F. P. A.; Danu, A.; De Falco, A.; Dillenseger, P.; Erhardt, F.; Fabbietti, L.; Faivre, J.; Feofilov, G.; Fernández Téllez, A.; Fiorenza, G.; Fokin, S.; Gaardhøje, J. J.; Gagliardi, M.; Goméz Coral, D. M.; Görlich, L.; Graham, K. L.; Groettvik, O. S.; Guerzoni, B.; Gunji, T.; Guzman, I. B.; Hamid, M.; Husova, L. A.; Hussain, N.; Ivanov, V.; Jonas, F.; Karavichev, O.; Khan, A. M.; Kisel, I.; Klay, J. L.; Klein, C.; Klein, S.; Kowalski, M.; Kubera, A. M.; Kumar, S.; Kundu, S.; Langoy, R.; Leardini, L.; Lettrich, M.; Lien, J.; Llope, W. J.; Malzacher, P.; Martinez Pedreira, M.; Matyja, A.; Mayer, C.; Mengke, C.; Moretto, S.; Muhuri, S.; Neskovic, G.; Otwinowski, J.; Pandey, A. K.; Pezzi, R. P.; Pisano, S.; Planinic, M.; Pozdniakov, V.; Ristea, C.; Rosnet, P.; Roy, A.; Senyukov, S.; Sett, P.; Shou, Q.; Skaali, T. B.; Slupecki, M.; Songmoolnak, A.; Soramel, F.; Stachel, J.; Steffanic, P. J.; Suleymanov, M.; Sultanov, R.; Šumbera, M.; Taillepied, G.; Thakur, S.; Umaka, E. N.; Vislavicius, V.; Wagner, B.; Weber, M.; Zampolli, C.
The European physical journal. C, Particles and fields, 02/2020, Letnik: 80, Številka: 2Journal Article
The production rates and the transverse momentum distribution of strange hadrons at mid-rapidity ( y < 0.5 ) are measured in proton-proton collisions at s = 13 TeV as a function of the charged particle multiplicity, using the ALICE detector at the LHC. The production rates of K S 0 , Λ , Ξ , and Ω increase with the multiplicity faster than what is reported for inclusive charged particles. The increase is found to be more pronounced for hadrons with a larger strangeness content. Possible auto-correlations between the charged particles and the strange hadrons are evaluated by measuring the event-activity with charged particle multiplicity estimators covering different pseudorapidity regions. When comparing to lower energy results, the yields of strange hadrons are found to depend only on the mid-rapidity charged particle multiplicity. Several features of the data are reproduced qualitatively by general purpose QCD Monte Carlo models that take into account the effect of densely-packed QCD strings in high multiplicity collisions. However, none of the tested models reproduce the data quantitatively. This work corroborates and extends the ALICE findings on strangeness production in proton-proton collisions at 7 TeV.
