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  • Open Access
  • Access by Xinjiang University

Baryon enhancement in jets

Antonio Ortiz

Róbert Vértesi*

  • Instituto de Ciencias Nucleares, UNAM, Circuito exterior s/n Ciudad Universitaria, 04510 Mexico City, Mexico

  • *Contact author: vertesi.robert@wigner.hu

Phys. Rev. D 114, 094011 – Published 12 November, 2026

DOI: https://doi.org/10.1103/l2xp-jqxt

Abstract

The enhancement of the baryon production relative to mesons in small-collision systems is considered a breakthrough result of the Large Hadron Collider since a similar effect in heavy-ion collisions is understood by invoking the formation of the strongly interacting quark-gluon plasma. In this paper, a baryon enhancement is reported for pTch,jet>15  GeV/c jets produced in pp collisions at s=13  TeV simulated with pythia8. The effect can be explained as a transition between quark-initiated jets (low jet multiplicities) to gluon-initiated jets (high jet multiplicities). The present result contributes to a deeper understanding of the multiplicity dependence of baryon enhancement across different collision systems.

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References (24)

  1. W. Busza, K. Rajagopal, and W. van der Schee, Heavy ion collisions: The big picture, and the big questions, Annu. Rev. Nucl. Part. Sci. 68, 339 (2018).
  2. B. B. Abelev et al., Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at sNN=2.76  TeV, Phys. Lett. B 736, 196 (2014).
  3. J. Adam et al., Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at sNN=2.76  TeV, Phys. Rev. C 93, 034913 (2016).
  4. S. Acharya et al., Production of charged pions, kaons, and (anti-)protons in Pb-Pb and inelastic pp collisions at sNN=5.02  TeV, Phys. Rev. C 101, 044907 (2020).
  5. R. J. Fries, Hadron correlations from recombination and fragmentation, J. Phys. G 31, S379 (2005).
  6. S. Acharya et al., The ALICE experiment: A journey through QCD, Eur. Phys. J. C 84, 813 (2024).
  7. U. W. Heinz and J. S. Moreland, Hydrodynamic flow in small systems or: “How the heck is it possible that a system emitting only a dozen particles can be described by fluid dynamics?”, J. Phys. Conf. Ser. 1271, 012018 (2019).
  8. C. Bierlich, G. Gustafson, L. Lönnblad, and A. Tarasov, Effects of overlapping strings in pp collisions, J. High Energy Phys. 03 (2015) 148.
  9. A. Ortiz Velasquez, P. Christiansen, E. Cuautle Flores, I. Maldonado Cervantes, and G. Paić, Color reconnection and flowlike patterns in pp collisions, Phys. Rev. Lett. 111, 042001 (2013).
  10. A. Baty, P. Gardner, and W. Li, Novel observables for exploring QCD collective evolution and quantum entanglement within individual jets, Phys. Rev. C 107, 064908 (2023).
  11. R. Vertesi and A. Ortiz, Thermodynamical string fragmentation and string density effects in jets, Phys. Rev. D 112, 036009 (2025).
  12. N. Fischer and T. Sjöstrand, Thermodynamical string fragmentation, J. High Energy Phys. 01 (2017) 140.
  13. S. Acharya et al., Production of KS0, Λ (Λ¯), Ξ± and Ω± in jets and in the underlying event in pp and p–Pb collisions, J. High Energy Phys. 07 (2023) 136.
  14. S. Acharya et al., Measurement of the fraction of jet longitudinal momentum carried by Λc+ baryons in pp collisions, Phys. Rev. D 109, 072005 (2024).
  15. T. Sjostrand, S. Mrenna, and P. Z. Skands, A brief introduction to pythia8.1, Comput. Phys. Commun. 178, 852 (2008).
  16. J. R. Christiansen and P. Z. Skands, String formation beyond leading colour, J. High Energy Phys. 08 (2015) 003.
  17. S. Acharya et al., Observation of a multiplicity dependence in the pT-differential charm baryon-to-meson ratios in proton–proton collisions at s=13  TeV, Phys. Lett. B 829, 137065 (2022).
  18. M. Cacciari, G. P. Salam, and G. Soyez, The anti-kT jet clustering algorithm, J. High Energy Phys. 04 (2008) 063.
  19. S. Acharya et al., Production of light-flavor hadrons in pp collisions at s=7 and s=13  TeV, Eur. Phys. J. C 81, 256 (2021).
  20. G. Alexander et al., A Direct observation of quark—gluon jet differences at LEP, Phys. Lett. B 265, 462 (1991).
  21. P. Abreu et al., Identified charged particles in quark and gluon jets, Eur. Phys. J. C 17, 207 (2000).
  22. B. Andersson, G. Gustafson, and T. Sjostrand, A model for baryon production in quark and gluon jets, Nucl. Phys. B197, 45 (1982).
  23. S. Acharya et al., Multiplicity dependence of π, K, and p production in pp collisions at s=13  TeV, Eur. Phys. J. C 80, 693 (2020).
  24. L. Gladilin, Fragmentation fractions of c and b quarks into charmed hadrons at LEP, Eur. Phys. J. C 75, 19 (2015).

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