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  • Open Access

Eta fragmentation functions revisited

Christine A. Aidala* and Devon A. Loomis†

Ramiro Tomas Martinez‡ and Rodolfo Sassot§

Marco Stratmann∥

  • *Contact author: caidala@umich.edu
  • †Contact author: dloom@umich.edu
  • ‡Contact author: rmartinez@df.uba.ar
  • §Contact author: sassot@df.uba.ar
  • ∥Contact author: marco.stratmann@uni-tuebingen.de
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Phys. Rev. D 113, 092012 – Published 15 May, 2026

DOI: https://doi.org/10.1103/q5p2-brl5

Abstract

We revisit the extraction of parton-to-eta meson fragmentation functions at next-to-leading order accuracy in QCD in the light of the recent hadroproduction measurements in proton-proton collisions obtained by the PHENIX, LHCb, and ALICE collaborations. In addition to an increased precision, the data explore complementary rapidity ranges and center-of-mass system energies. The analysis exploits the theoretical scale dependence to ease tensions among the datasets at different energies that are potentially caused by QCD corrections beyond the next-to-leading order. The resulting set of fragmentation functions yields a consistent description of all available data. Estimates of uncertainties are obtained with the Monte Carlo replica method.

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See Also

Cross sections of η mesons in p+p collisions at forward rapidity at s=500  GeV and central rapidity at s=510  GeV

N. J. Abdulameer et al. (PHENIX Collaboration)
Phys. Rev. D 113, 092011 (2026)

Article Text

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Phys. Rev. D 113, 092012– Published 15 May, 2026
  • Received 8 July 2025
  • Accepted 19 August 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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