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arXiv · 2507.04887

Eta Fragmentation Functions Revisited

Christine A. Aidala·Devon A. Loomis·Ramiro Tomas Martinez·Rodolfo Sassot·Marco Stratmann
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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 data sets 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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Christine A. Aidala, Devon A. Loomis, Ramiro Tomas Martinez, Rodolfo Sassot, Marco Stratmann. 2025-07-07. Eta Fragmentation Functions Revisited. https://arxiv.org/abs/2507.04887

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