【摘要】 通过计算介子交换过程对质子海夸克的贡献的研究 ,发现将介子交换过程中反冲核子看成物理核子更合理。对极化的核子结构函数一阶矩进行了计算 ,与现有实验结果进行比较表明 ,对核子自旋结构函数的影响 ,介子交换不是惟一的 ,还应考虑其它因素的效应更多还原

【Abstract】 The aim of this paper is to study different influences and calculate the contribution of meson exchange accurately.It is more suitable to regard the recoil proton as a physical proton than to regard it as a bare proton in the pion exchange processes. It is calculated the flavor asymmetry of ? in the nucleon sea,the first moment of spin dependent structure functionsandof nucleon.we obtained in the case where the recoil nucleons are taken as physical nucleons and those obtained in the case where they are taken as bare nucleons.更多还原