Fragmentation functions for ^-/()over-bar⁺ using neural networks

We present a determination of fragmentation functions (FFs) for the octet baryon Xi-/(Xi) over bar (+) from data for single inclusive electron-positron annihilation. Our parametrization in this QCD analysis is provided in terms of a Neural Network (NN). We determine fragmentation functions for Xi-/(Xi) over bar (+) at next-to-leading order and for the first time at next-to-next-to-leading order in perturbative QCD. We discuss the improvement of higher-order QCD corrections, the quality of fit, and the comparison of our theoretical results with the fitted datasets. As an application of our new set of fragmentation functions, named SHKS22, we present predictions for Xi-/(Xi) over bar (+) baryon production in proton-proton collisions at the LHC experiments. (c) 2022 Published by Elsevier B.V.