The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Peter Christiansen Profile

Peter Christiansen

Professor

Peter Christiansen Profile

Studying strangeness and baryon production mechanisms through angular correlations between charged Ξ baryons and identified hadrons in pp collisions at s = 13 TeV

Author

  • S. Acharya
  • J. Adolfsson
  • S. Basu
  • P. Christiansen
  • J. Hansen
  • K.E. Iversen
  • O. Matonoha
  • R. Nepeivoda
  • A. Ohlson
  • D. Silvermyr
  • J. Staa
  • V. Vislavicius
  • N. Zurlo
Show all

Summary, in English

The angular correlations between charged Ξ baryons and associated identified hadrons (pions, kaons, protons, Λ baryons, and Ξ baryons) are measured in pp collisions at s = 13 TeV with the ALICE detector to give insight into the particle production mechanisms and balancing of quantum numbers on the microscopic level. In particular, the distribution of strangeness is investigated in the correlations between the doubly-strange Ξ baryon and mesons and baryons that contain a single strange quark, K and Λ. As a reference, the results are compared to Ξπ and Ξp correlations, where the associated mesons and baryons do not contain a strange valence quark. These measurements are expected to be sensitive to whether strangeness is produced through string breaking or in a thermal production scenario. Furthermore, the multiplicity dependence of the correlation functions is measured to look for the turn-on of additional particle production mechanisms with event activity. The results are compared to predictions from the string-breaking model Pythia 8, including tunes with baryon junctions and rope hadronisation enabled, the cluster hadronisation model Herwig 7, and the core-corona model Epos-lhc. While some aspects of the experimental data are described quantitatively or qualitatively by the Monte Carlo models, no model can match all features of the data. These results provide stringent constraints on the strangeness and baryon number production mechanisms in pp collisions. © The Author(s) 2024.

Department/s

  • Particle and nuclear physics

Publishing year

2024

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2024

Issue

9

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Hadron-Hadron Scattering
  • Particle Correlations and Fluctuations
  • Relativistic Heavy Ion Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479