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arXiv 1109.6472hep-phnucl-th
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质子和轻核的横向研究

Transversity studies with protons and light nuclei

Sergio Scopetta

摘要:

本文回顾了计算时间反演奇横动量依赖部分子分布(T-odd TMDS)的一般形式,并将其应用于超前扭转量的计算,即,Sivers和Boer-Mulders函数两种不同的模型的质子结构,即非相对论组分夸克模型和MIT袋模型,已被使用。在这两个框架中得到的结果满足Burkartt求和规则在很大程度上。本文还计算了横向极化$^3$ He的半包容深度非弹性散射中提取中子单自旋不对称性的核效应。结果表明,用脉冲近似方法描述的核效应是在理论控制之下的。

英文摘要:

A general formalism to evaluate time-reversal odd transverse momentum dependent parton distributions (T-odd TMDS) is reviewed and applied to the calculation of the leading-twist quantities, i.e., the Sivers and the Boer-Mulders functions. Two different models of the proton structure, namely a non relativistic constituent quark model and the MIT bag model, have been used. The results obtained in both frameworks fulfill the Burkardt sum rule to a large extent. The calculation of nuclear effects in the extraction of neutron single spin asymmetries in semi-inclusive deep inelastic scattering off transversely polarized $^3$He is also illustrated. It is found that the nuclear effects described by an Impulse Approximation approach are under theoretical control.

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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