Q^2 evolution studies of nuclear structure function F_2 at HERA
  Q**2 dependence of nuclear structure functions is important for understanding perturbative QCD in nuclear environment. However, current experimental data are not sufficient for studying nuclear dependence in the Q**2 evolution because the data are limited in the small Q**2 region at small x. The future HERA program can study the evolution in the large Q**2 region, and it provides us crucial information on recombination effects and on higher-order alpha_s effects in the nuclear structure functions. 
S. Kumano and M. Miyama (Saga Univ.)