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Article
Report number arXiv:2308.16706 ; CERN-EP-2023-198
Title 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) ALICE Collaboration  Показване на всичките 1064 автора
Corporate author(s) The ALICE collaboration
Publication 2024-09-18
Imprint 30 Aug 2023
Number of pages 37
Note 37 pages, 14 captioned figures, 3 tables, authors from page 31, published version, figures at http://alice-publications.web.cern.ch/node/9678
Published in: JHEP 2409 (2024) 102
DOI 10.1007/JHEP09(2024)102
Subject category Nuclear Physics - Experiment ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ALICE
Keywords QCD ; particle and resonance production ; particle correlations and fluctuations ; experimental results
Abstract 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 one model can match all features of the data. These results provide stringent constraints on the strangeness and baryon number production mechanisms in pp collisions.
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Copyright/License Publication: © 2024-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³
Preprint: © 2023-2025 CERN (License: CC-BY-4.0)
Submitted by francesco.prino@cern.ch



 


 Записът е създаден на 2023-08-30, последна промяна на 2025-01-06


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