Speaker
Description
Using continuum Schwinger function methods and the Drell-Levy-Yan relation, this work provides a unified description for pion and kaon distribution functions and fragmentation functions (FFs). After evolution to higher scale, the obtained FFs conform with a range of physical expectations for FF behaviour on the endpoint domains, such as that nonsignlet FFs vanish at z=0 and singlet FFs diverge faster than 1/z. These FFs are compared with the existing experimental fits, and the comparison provides meaningful insights into the behavior of FFs. Predictions for hadron multiplicities in jets are also delivered. They reveal SU(3) symmetry breaking in the charged-kaon/neutral-kaon multiplicity ratio, whose size diminishes with increasing reaction energy.
