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

JYU-yksiköt:


OKM-raportointi: Kyllä

Raportointivuosi: 2020

JUFO-taso: 2


Viimeisin päivitys 2022-20-09 klo 13:40