Dihadron fragmentation functions from the NJL-jet model and their QCD evolution

Abstract

We present results for dihadron fragmentation functions from the Nambu–Jona-Lasinio-jet model evolved from the model scale to a typical experimental scale of 4 GeV². The numerical method used in this evolution is discussed in detail. The effect of evolution on the shapes of the dihadron fragmentation functions is discussed for a doubly favored process (u→π⁺π⁻), as well as a singly favored (u→π⁺K⁻) process involving light quarks. Finally, we explore the production of K⁺K⁻ pairs from an initial u, d or s quark.