Leading Twist Parton Distribution Amplitudes in Heavy Flavor Pseudoscalar Mesons From Dyson-Schwinger Equations of QCD

We compute the valence-quark leading twist parton distribution amplitudes (PDAs) of heavy pseudoscalar mesons eta(c) and eta(b) and find that they are both broader than the delta-like function while narrower than the asymptotic one. The evolution of distribution amplitude with momentum scale is then considered and PDAs will turn to a asymptotic form when the momentum goes to infinity.CPCI-S(ISTP)mhding@pku.edu.cn; hiei@pku.edu.cn; lei.chiong@gmail.com; yxliu@pku.edu.cn; c.d.roberts@anl.gov11