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arXiv 0910.4879nucl-th
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F2结构功能的核介质修饰

Nuclear medium modification of the F2 structure function

M. Sajjad Athar, I. Ruiz Simo, M. J. Vicente Vacas

摘要:

考虑费米运动、束缚、π介子云和ρ介子云的贡献,研究了轻子核深部非弹性散射过程中原子核电磁结构函数F2(x,Q^2)中的核效应.计算是在局域密度近似下用相对论核谱函数进行的,该函数包括了核物质的核子关联。得到了氘结构函数的比值,并与最近JLAB的轻核结果进行了比较,特别注意x分布的斜率。这个幅度显示出非平凡的A依赖性,并且对可能的归一化不确定性不敏感。这些结果也与一些使用中等质量原子核的旧实验进行了比较。

英文摘要:

We study the nuclear effects in the electromagnetic structure function F2(x,Q^2) in nuclei in the deep inelastic lepton nucleus scattering process by taking into account Fermi motion, binding, pion and rho meson cloud contributions. Calculations have been done in a local density approximation using relativistic nuclear spectral functions which include nucleon correlations for nuclear matter. The ratios over deuteron structure function are obtained and compared with the recent JLAB results for light nuclei with special attention to the slope of the x distributions. This magnitude shows a non trivial A dependence and it is insensitive to possible normalization uncertainties. The results have also been compared with some of the older experiments using intermediate mass nuclei.

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