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David Silvermyr

David Silvermyr

Senior lecturer

David Silvermyr

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

Author

  • Acharya S.
  • J. Adolfsson
  • P. Christiansen
  • O. Matonoha
  • A. Nassirpour
  • A. Oskarsson
  • T. Richert
  • Oscar M Rueda
  • D. Silvermyr
  • E. Stenlund
  • Zurlo N.

Summary, in English

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.

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration

Publishing year

2020

Language

English

Publication/Series

European Physical Journal C

Volume

80

Issue

2

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044