A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: ALICE Collaboration
Lehti tai sarja: European Physical Journal C
ISSN: 1434-6044
eISSN: 1434-6052
Julkaisuvuosi: 2020
Volyymi: 80
Lehden numero: 2
Artikkelinumero: 167
Kustantaja: Springer
Julkaisumaa: Saksa
Julkaisun kieli: englanti
DOI: https://doi.org/10.1140/epjc/s10052-020-7673-8
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/68021
Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/1908.01861
Tiivistelmä
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.
YSO-asiasanat: hiukkasfysiikka
Vapaat asiasanat: experimental physics
Liittyvät organisaatiot
OKM-raportointi: Kyllä
VIRTA-lähetysvuosi: 2020
JUFO-taso: 2