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Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at √s = 13 TeV

S., Acharya ; Adolfsson, J. LU ; Christiansen, P. LU ; Matonoha, O. LU ; Nassirpour, A. LU orcid ; Oskarsson, A. LU ; Richert, T. LU ; Rueda, Oscar M LU ; Silvermyr, D. LU orcid and Stenlund, E. LU , et al. (2020) In European Physical Journal C 80(2).
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 KS0, 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... (More)
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 KS0, 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. © 2020, CERN for the benefit of the ALICE collaboration. (Less)
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Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
80
issue
2
article number
167
publisher
Springer
external identifiers
  • scopus:85097330034
ISSN
1434-6044
DOI
10.1140/epjc/s10052-020-7673-8
language
English
LU publication?
yes
id
65bded5e-0de2-4b15-a494-7550718eee16
date added to LUP
2022-04-05 17:31:36
date last changed
2023-04-02 22:38:52
@article{65bded5e-0de2-4b15-a494-7550718eee16,
  abstract     = {{The production rates and the transverse momentum distribution of strange hadrons at mid-rapidity (| y| &lt; 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 KS0, 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. © 2020, CERN for the benefit of the ALICE collaboration.}},
  author       = {{S., Acharya and Adolfsson, J. and Christiansen, P. and Matonoha, O. and Nassirpour, A. and Oskarsson, A. and Richert, T. and Rueda, Oscar M and Silvermyr, D. and Stenlund, E. and N., Zurlo}},
  issn         = {{1434-6044}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C}},
  title        = {{Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at √s = 13 TeV}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-020-7673-8}},
  doi          = {{10.1140/epjc/s10052-020-7673-8}},
  volume       = {{80}},
  year         = {{2020}},
}