Study of fragmentation function at Belle
2018 September 20
2018 November 23
Fragmentation functions provide a substantial tool to understand the formation of confined objects from asymptotically free partons. They can also be used in the study of the spin structure of the nucleon. In particular the access to the flavor information and to quark transversity requires fragmentation function information. The Belle experiment provides a number of measurements to address these. Some of the most recent results include the measurements of hyperon and charmed baryon cross sections and their total production rates. Also the surprising nonzero $\Lambda$ polarization has been recently reported. Last, also the measurement of differential cross sections for di-hadrons as a function of mass and fractional energy have been reported. The related di-hadron fragmentation functions are required, together with our previously published interference fragmentation functions to extract transversity from SIDIS and proton-proton collisions.