摘要
本文认为原子核是保持重子数守恒的若干核子和反核子的复合系统,在核内有过剩的π介子担负核子或反核子间交换作用.这些过剩π介子和反核子内的部分子带走一定动量分额,从而可解释x中间区EMC效应的主要特征.考虑到遮蔽-反遮蔽效应和费米运动后,计算了多种原子核的EMC效应,在0<x<1的整个区间内,理论结果与新近实验都有较好符合.
A correct relativistic nuclear model is presented on the ratios of structure functions F_2~A (x, Q^2) measured in DIS with several different nuclei. We shall assume here that a nucleus consists of nucleons, antinucleons and excess pions, the pions being associate with the meson exchange forces responsible for nuclear binding, only the baryon number is conserved. It is also considered that shadowing-antishadowing and Fermi motion. Our results are consistent with the available recent data.
出处
《高能物理与核物理》
CSCD
北大核心
1989年第1期35-41,共7页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
