2 papers
hep-ph2026
Distribution amplitudes and functions of ground-state scalar and pseudoscalar charmonia
X. -Y. Zeng, Y. -Y. Xiao, Z. -N. Xu +2
Charmonia are often supposed to provide simple hydrogen-like ``atomic'' systems that can be used to obtain insights into heavier-quark QCD. We use continuum Schwinger function meth…
hep-ph2026
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 th…