The. ¦§_c And ¦Ã Production Nuclear Gluon Distribution

EMC effects reflect that bound nucleon structure functions are different from free nucleon. The inner structure of bound nucleon is also different from free nucleon. After the found of EMC effect, many models are used to study the nuclear effect of the nucleon structure functions. But these models have some parameters and small experimental data. So they can't sound explain to nuclear effects in all x regions. The model-independent method given by K.J.Eskola et.al. and M.Hirai are introduced. The parton distributions function of bound nucleon are obtained through the experimental data of deep inelastic scatting and Drell-Yan process.Within the color-octet model the associate η_c+γ production inthe p-p and p-Au collisions is studied with nuclear gluon distribution function independent on models. In this paper wecalculated the cross-section ratios of associate η_c + γ productionin the p-p and p-Au collisions and found that this process is connected closely with the nuclear gluon distribution function. Bystudying the associate η_c + γ production in high energy p-Aucollision, we can know more about the nuclear gluon distribution function.