Speaker
Ralf Seidl
(RIKEN)
Description
Fragmentation functions describe the formation of final-state hadrons from high-energetic partons. As they are non-perturbative objects they cannot be calculated from first principles in QCD but need to be measured. Especially e+e- annihilation is a clean tool to extract fragmentation functions since no hadrons exist in the initial state.
We report the recent measurements by Belle/Belle II of light and charmed mesons that decay into two or three pions or kaons as a function of the relative momentum fraction. These measurements will be used in global fragmentation fits and provide input to the semi-inclusive DIS program at the Electron-Ion-Collider. They can also improve the tuning of Monte-Carlo generators.
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Author
Ralf Seidl
(RIKEN)