Leading Twist Parton Distribution Amplitudes in Heavy Vector Mesons

¹ Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
² Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
³ CSSM, School of Chemistry and Physics, University of Adelaide, Adelaide SA 5005, Australia
⁴ Center for High Energy Physics, Peking University, Beijing 100871, China
⁵ Division of Physics, Argonne National Laboratory, Argonne, IL 60439, USA

^a e-mail: hiei@pku.edu.cn,speaker
^b e-mail: mhding@pku.edu.cn
^c e-mail: lei.chiong@gmail.com
^d e-mail: yxliu@pku.edu.cn
^e e-mail: c.d.roberts@anl.gov

Published online: 25 March 2016

Abstract

We employed QCD’s Dyson-Schwinger equations (DSEs) for heavy quarks and obtained the leading twist parton distribution amplitudes (PDAs) in heavy vector mesons J/Ψ and ϒ. We found that all of the amplitudes are narrower than the asymptotic form, while they deviate from δ function. This indicates that the interaction between the two continent quarks are still important in the mesons consisted of charm and bottom quarks.