NUCLEAR GLUON DISTRIBUTIONS IN A PARTON MODEL

Gluon distributions in carbon and tin nuclei are investigated by using a Q2 rescaling model with parton recombination effects. We obtain strong shadowings in the small x region due to the recombinations. The ratio G(A)(x)/G(N)(x) in the medium x region is typically 0.9 for medium size nuclei. At large x, the ratio becomes large due to gluon fusions from different nucleons. Comparisons with recent New Muon Collaboration data for G(sn)(x)/G(C)(x) indicate that more accurate experimental data are needed for testing the model.