Shadowing in inclusive reactions on composite systems and large-p⊥inclusive reactions in nuclei

We show that there are no shadowing corrections to certain types of inclusive reactions in nuclei, in the sense that the results one finds when shadowing corrections are applied are the same as if no corrections are applied. Among these processes is production of particles at fixed angle. We suggest that this process should have a linear $A$ dependence at large transverse momentum, in contradiction with experimental data. We discuss possible resolutions of this difference, and find we cannot explain it in a natural way, suggesting this process may harbor even more interesting new physics than it has already revealed. We also mention a possible linear $A$ dependence for the production of high-mass dileptons on nuclei.