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arXiv · 1202.3281

Fragmentation and quark distribution functions for the pion and kaon with explicit flavor-SU(3)-symmetry breaking

Seung-il Nam·Chung-Wen Kao
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Abstract

We investigate the unpolarized pion and kaon fragmentation functions, employing the nonlocal chiral-quark model, which manifests the nonlocal interactions between the quarks and pseudoscalar mesons, considering the explicit flavor-SU(3)-symmetry breaking in terms of the current-quark masses. Moreover, we study the quark-distribution functions, derived from the fragmentation ones with the Drell-Yan-Levi relation. Numerical results are evaluated to higher Q^2 by the DGLAP evolution and compared with the empirical data. The ratios between the relevant valance quark-distribution functions are also discussed. It turns out that the present results are in relatively good agreement with available data and other theoretical estimations.

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Seung-il Nam, Chung-Wen Kao. 2012-02-15. Fragmentation and quark distribution functions for the pion and kaon with explicit flavor-SU(3)-symmetry breaking. https://doi.org/10.1103/physrevd.85.094023

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