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arXiv 1104.0125nucl-th
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标度函数、谱函数与核中核子动量分布

Scaling Function, Spectral Function and Nucleon Momentum Distribution in Nuclei

A. N. Antonov, M. V. Ivanov, J. A. Caballero, M. B. Barbaro, J. M. Udias, E. Moya de Guerra, T. W. Donnelly

摘要:

重新讨论了从(e,e ')截面分析中提取的标度函数与核中的谱函数/动量分布之间的联系。几种描述的光谱函数的基础上的独立粒子模型,连同包括核子相关性,和所产生的空穴态的宽度的能量依赖性的影响进行了研究。虽然这些方法中的一些提供粗略的总体协议与数据,他们没有被发现能够再现的实验尺度函数,即其不对称性的显着特点之一。然而,除了最终状态的相互作用,纳入本研究中使用相对论平均场论或通过一个复杂的光学势,导致不对称的标度函数根据数据。目前的分析似乎表明,最终状态的相互作用构成了一个重要的成分,并需要提供一个适当的描述的实验标度函数。

英文摘要:

The link between the scaling function extracted from the analysis of (e,e') cross sections and the spectral function/momentum distribution in nuclei is revisited. Several descriptions of the spectral function based on the independent particle model are employed, together with the inclusion of nucleon correlations, and effects of the energy dependence arising from the width of the hole states are investigated. Although some of these approaches provide rough overall agreement with data, they are not found to be capable of reproducing one of the distinctive features of the experimental scaling function, namely its asymmetry. However, the addition of final-state interactions, incorporated in the present study using either relativistic mean field theory or via a complex optical potential, does lead to asymmetric scaling functions in accordance with data. The present analysis seems to indicate that final-state interactions constitute an essential ingredient and are required to provide a proper description of the experimental scaling function.

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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