Pion and kaon fragmentation functions at next-to-next-to-leading order
Résumé
We present a new determination of unpolarised charged pion and kaon fragmentation functions from a set of single-inclusive electron-positron annihilation and lepton-nucleon semi-inclusive deep-inelastic scattering data. The determination includes next-to-next-to-leading order QCD corrections to both processes, and is carried out in a framework that combines a neural-network parametrisation of fragmentation functions with a Monte Carlo representation of their uncertainties. We discuss the quality of the determination, in particular its dependence on higher order corrections.
Mots clés
pi: fragmentation function
K: fragmentation function
quantum chromodynamics: correction
correction: higher-order
higher-order: 2
fragmentation function: parametrization
electron positron: annihilation
lepton nucleon: semi-inclusive reaction
deep inelastic scattering: semi-inclusive reaction
Monte Carlo
neural network
statistical analysis
numerical calculations