Unpolarized Dihadron Fragmentation Functions in Nonlocal Chiral Quark Model
Dong-Jing Yang, Fu-Jiun Jiang, Chian-De Li, Chung-Wen Kao, and Seung-il Nam 2014 arxiv 1407.4453v1We have calculated the unpolarized dihadron fragmentation functions (uDiFFs) of pions and kaons using the nonlocal chiral-quark model (NLChQM) and evolved our results to the transferred momentum scale Q^2 = 4GeV^2 by the QCD evolution equations. These uDiFFs have also been computed in the Nambu–Jona-Lasinio-jet (NJL-jet) model for the sake of comparison. We find that there is substantial difference between the results of these two models. Furthermore, the DiFFs of u → π^+π^− and g → π^+π^− at Q^2 = 109GeV^2 in these two models are presented in comparison with the parametrizations fitted by the Monte Carlo event generator JETSET.