Light-Cone 2024: Hadron Physics in the EIC era

The meson's boundstate equation in two dimensional QCD under large Nc limit (QCD₂) are exactly solvable in both light-front quantization and equal time quantization. In the meanwhile, QCD₂captures some key features of realistic QCD in four dimension, such as color confinement, nonzero quark condensate. QCD₂become an ideal theoretical laboratory for investigate theoretical method dealing with hadrons' structure from a field theory first-principle approach, such as Large Momentum Effective Theory, NRQCD factorization. We present the QCD₂investigation of nonperturbative quantities: e.g. light-cone/quasi PDF/GPD, (heavy quark) fragmentation function, intrinsic charm distribution and the energy decomposition of a hadron is also discussed.