A1 Journal article (refereed)
Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at √s = 13 TeV (2020)
ALICE Collaboration. (2020). Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at √s = 13 TeV. European Physical Journal C, 80(2), Article 167. https://doi.org/10.1140/epjc/s10052-020-7673-8
JYU authors or editors
Publication details
All authors or editors: ALICE Collaboration
Journal or series: European Physical Journal C
ISSN: 1434-6044
eISSN: 1434-6052
Publication year: 2020
Volume: 80
Issue number: 2
Article number: 167
Publisher: Springer
Publication country: Germany
Publication language: English
DOI: https://doi.org/10.1140/epjc/s10052-020-7673-8
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68021
Web address of parallel published publication (pre-print): https://arxiv.org/abs/1908.01861
Abstract
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 K0S, 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.
Keywords: particle physics
Free keywords: experimental physics
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2020
JUFO rating: 2