Nuclear dependence of Q2 evolution in the structure function F2

Q2 evolution of the structure functions F2 in tin and carbon nuclei is investigated in order to understand recent NMC measurements. F2 is evolved by using leading-order DGLAP, next-to-leading-order DGLAP, and parton-recombination equations. NMC experimental result ∂[F2SnF2C]∂[ln Q2] ≠ 0 could be essentially understood by the difference of parton distributions in the tin and carbon nuclei. However, we find an interesting indication that large higher-twist effects on the Q2 evolution could be ruled out. Nuclear dependence of the Q2 evolution could be interesting for further detailed studies.