Spin-improved power-law wave functions yield 41% valence quark momentum fraction at 16 GeV² for pion and kaon, with vector form factors agreeing with experiment and charge radii of 0.668 fm and 0.704 fm.
Pich, [arXiv:hep-ph/9505231 [hep-ph]]
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Internal structure of light mesons using the power law wave function
Spin-improved power-law wave functions yield 41% valence quark momentum fraction at 16 GeV² for pion and kaon, with vector form factors agreeing with experiment and charge radii of 0.668 fm and 0.704 fm.