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arXiv 1012.5033hep-phhep-ex
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极化包含和半包含DIS数据的QCD分析

QCD Analysis of Polarized Inclusive and Semi-inclusive DIS Data

Elliot Leader, Alexander V. Sidorov, Dimiter B. Stamenov

摘要:

本文提出了一种新的组合非线性光学QCD方法,对偏振的包含和半包含DIS数据进行了分析。与以前的综合分析不同,本文考虑了核子自旋结构函数g1表达式中的1/Q^2项(运动学-目标质量修正和动力学-高扭转修正)。新的COMPASS数据包括在分析中。半包容性(SIDIS)的数据上的极化部分子密度(PDF)和更高的扭曲修正的影响被证明。讨论了用DIS数据拟合和用DIS和SIDIS数据拟合得到的极化奇夸克密度的有争议的行为。

英文摘要:

A new combined NLO QCD analysis of the polarized inclusive and semi-inclusive DIS data is presented. In contrast to previous combined analyses, the 1/Q^2 terms (kinematic - target mass corrections, and dynamic - higher twist corrections) in the expression for the nucleon spin structure function g1 are taken into account. The new COMPASS data are included in the analysis. The impact of the semi-inclusive (SIDIS) data on the polarized parton densities (PDFs) and on the higher twist corrections is demonstrated. The controversial behavior of the polarized strange quark density obtained from the fit to the DIS data alone, and a combined analysis of DIS and SIDIS data is discussed.

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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