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Determination of fragmentation functions from charge asymmetries in hadron production

  • State Key Laboratory of Dark Matter Physics, Shanghai Key Laboratory for Particle Physics and Cosmology, Key Laboratory for Particle Astrophysics and Cosmology (MOE), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

  • We propose a novel method for extracting non-singlet (NS) fragmentation functions (FFs) of light charged hadrons from charge asymmetries measured in hadron fragmentation using data from both single-inclusive electron-positron annihilation and semi-inclusive deep-inelastic scattering processes. We determine the NS FFs for pions and kaons at next-to-next-to-leading order in Quantum Chromodynamics through a comprehensive uncertainty analysis. The extracted FFs reveal a scaling index of approximately 0.7 at large momentum fractions and low energy scales, a strangeness suppression factor of approximately 0.5, and universality in fragmentation of light mesons. Our findings establish a valuable benchmark for testing non-perturbative QCD models and Monte Carlo event generators, and serve as crucial inputs for future electron-ion colliders.
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Jun Gao, ChongYang Liu and Bin Zhou. Determination of Fragmentation Functions from Charge Asymmetries in Hadron Production[J]. Chinese Physics C. doi: 10.1088/1674-1137/ae31df
Jun Gao, ChongYang Liu and Bin Zhou. Determination of Fragmentation Functions from Charge Asymmetries in Hadron Production[J]. Chinese Physics C. doi:10.1088/1674-1137/ae31df shu
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