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hep-ph2025
Orbital angular momentum in the pion and kaon: rest-frame and light-front
Y. -Y. Xiao, Z. -N. Xu, Z. -Q. Yao +2
Orbital angular momentum (OAM) is not a Poincaré invariant quantity; so, its value is observer dependent. Notwithstanding that, in quantum chromodynamics, a Poincaré-invariant theo…
hep-ph2025
Symmetry Constraints on Pion Valence Structure
Xiaobin Wang, Lei Chang, Minghui Ding +2
The profile of the pion valence quark distribution function (DF) remains controversial. Working from the concepts of QCD effective charges and generalised parton distributions, we…
hep-ph2025
Exclusive photoproduction of light and heavy vector mesons: thresholds to very high energies
Lin Tang, Hui-Yu Xing, Minghui Ding +1
A reaction model for , , which exposes the quark-antiquark content of the photon in making the transition , wh…