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arXiv 1405.4633hep-ph
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极化深度非弹性散射中的目标质量修正和高扭曲效应

Target mass corrections and higher twist effects in polarized deep-inelastic scattering

Sara Taheri Monfared, Zahra Haddadi, Ali N. Khorramian

摘要:

我们在一个固定的味数方案中对极化结构函数$g_1$和$g_2$的世界数据进行了次首阶QCD分析。我们包括目标质量校正和更高的扭曲效应在我们的拟合过程中,并研究其不可忽略的影响物理上有趣的数量。确定了Twist-3对两种极化结构函数的贡献,提高了极化部分子分布函数的提取精度。在此基础上,给出了$^{3}\rm He$和$^{3}\rm H$的极化结构函数.此外,总结规则推导和比较现有的理论和实验结果。

英文摘要:

We perform a next-to-leading-order QCD analysis to world data on polarized structure functions $g_1$ and $g_2$ in a fixed-flavor number scheme. We include target mass corrections and higher twist effects in our fitting procedure and study their non-negligible effects on physically interesting quantities. Twist-3 contributions to both polarized structure functions are determined, and the accuracy of the extracted polarized parton distribution functions is improved. $^{3}\rm He$ and $^{3}\rm H$ polarized structure functions are described based on our fit result. Moreover, sum rules are derived and compared with available theoretical and experimental results.

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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