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arXiv 1005.2035hep-phnucl-exnucl-th
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核效应对小x射线纵结构函数的影响

Nuclear effects on the longitudinal structure function at small x

N. Armesto, H. Paukkunen, C. A. Salgado, K. Tywoniuk

摘要:

我们讨论了小$x$原子核DIS中的纵向结构函数。我们的工作范围内的通用部分子密度在DGMENS分析在NLO。结果表明,核效应对纵向结构函数的影响与对胶子分布的影响密切相关。从最新的核PDF集可用的误差分析也允许传播从目前的数据的不确定性。通过这种方式,我们评估了未来实验中所需的最小灵敏度,以提高对核胶的认识。我们进一步讨论的不确定性的提取$F_2$核目标,介绍了通常的假设,比例$F_L/F_2$是独立的核大小。我们专注于与未来轻子-离子对撞机相关的运动学区域。

英文摘要:

We discuss the longitudinal structure function in nuclear DIS at small $x$. We work within the framework of universal parton densities obtained in DGLAP analyses at NLO. We show that the nuclear effects on the longitudinal structure function closely follow those on the gluon distribution. The error analyses available from newest sets of nuclear PDFs also allow to propagate the uncertainties from present data. In this way, we evaluate the minimal sensitivity required in future experiments for this observable to improve the knowledge of the nuclear glue. We further discuss the uncertainties on the extraction of $F_2$ off nuclear targets, introduced by the usual assumption that the ratio $F_L/F_2$ is independent of the nuclear size. We focus on the kinematical regions relevant for future lepton-ion colliders.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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