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We investigate the unpolarized pion and kaon fragmentation functions usingthe nonlocal chiral-quark model. In this model the interactions between thequarks and pseudoscalar mesons is manifested nonlocally. In addition, theexplicit flavor SU(3) symmetry breaking effect is taken into account in termsof the current quark masses. The results of our model are evaluated to higher$Q^2$ value $Q^2=4\,\mathrm{GeV}^2$ by the DGLAP evolution. Then we comparethem with the empirical parametrizations. We find that our results are inrelatively good agreement with the empirical parametrizations and the othertheoretical estimations.

The quark-jet contribution to the fragmentation functions for the pion and kaon with the nonlocal interactions