Novel features of nuclear chromodynamics

Abstract.

I review a number of QCD topics where the nuclear environment provides new insights into fundamental aspects of the strong interactions. The topics include novel perspectives for nuclear physics, such as the hidden color of nuclear form factors, the relation of the nuclear force at short distances to quark interchange interactions, the effects of “color transparency” on the baryon-to-meson anomaly in hard heavy-ion colisions, flavor-dependent antishadowing, novel exotic multiquark states, the anomalous nuclear dependence of quarkonium hadroproduction, flavor-dependent antishadowing, and the breakdown of sum rules for nuclear structure functions. I also briefly discuss the insights into hadron physics and color confinement that one obtains from light-front holography, including supersymmetric features of the hadron spectrum. I also note that the virtual Compton amplitude on a proton (or nucleus) can be measured for two spacelike photons $q^{2}_{1}, q^{2}_{2} < 0$ using positronium-proton scattering $[e^{+}e^{-}]p\rightarrow e^{+}e^{-}p'$.