$Q^2$ evolution of structure functions in the nucleon and nuclei

Abstract

$Q^2$ evolution of structure functions in the nucleon and nuclei is investigated by using usual DGLAP equations and parton-recombination equations. Calculated results for proton's $F_2$ and for the ratio $F_2^{Ca}/F_2^D$ are compared with various experimental data. Furthermore, we study nuclear dependence of $Q^2$ evolution in tin and carbon nuclei: $\partial [F_2^{Sn}/F_2^C]/\partial [ln{Q}^2]\ne 0$, which was found by NMC.

6 pages, LATEX with epsf.sty and wrapfig.sty, 3 eps figures. Talk given at the Circum-Pan-Pacific Workshop on High Energy Spin Physics'96. Kobe, Japan, October 2 - 4, 1996. Complete postscript file including the figures is available at ftp://ftp.cc.saga-u.ac.jp/pub/paper/riko/quantum1 or at http://www.cc.saga-u.ac.jp/saga-u/riko/physics/quantum1/structure.html