高能P-Ca碰撞的核效应与价夸克分布和海夸克分布

Ca Nucleus the Nuclear Effects on Valence Quark Distributions and Sea Quark Distributions

提出了一个由ｌ－Ａ的深度非弹性散射和核Ｄｒｅｌ－Ｙａｎ过程的实验数据得到价夸克分布和海夸克分布的核效应的函数ＲＡｖ（ｘｔ）和ＲＡｓ（ｘｔ）的方法．这两个函数可以用来检验核子结构函数的核效应的理论模型．文中以钙核为例求出了ＲＣａｖ（ｘｔ）和ＲＣａｓ（ｘｔ）．

A method is presented to get nuclear effect functions R A v (x t) and R A s (x t ) on valence quark distributions and sea quark distributions from the data of l -A DIS process and nuclear Drell-Yan process.Both the functions may be used to test the theoretical models explaining the nuclear effects.As a example,we have got R Ca v (x t) and R Ca s (x t) of calcium nucleus by this methos.