arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1903.00514hep-ph
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不使用正交多项式方法的中微子-核子深度非弹性散射结构函数的QCD分析

QCD analysis of structure functions in deep inelastic neutrino-nucleon scattering without using the orthogonal polynomials approach

A. Ghaffari Tooran, A. Khorramian, H. Abdolmaleki

摘要:

在考虑核修正和高扭修正的情况下,利用带电流中微子-核子深度非弹性散射(DIS)的全部数据,在NLO和NNLO近似下,对中微子-核子结构函数进行了非单重态QCD分析.在这个分析中,我们提取$xu_v(x,Q^2)$和$xd_v(x,Q^2)$价部分子分布函数(PDF)在广泛的$x$和$Q^2$,并确定其参数化的相关误差使用xFitter框架。我们的结果价夸克密度与他们的不确定性进行比较,使用其他PDF集从不同的群体提取的预测。我们确定$α_{s}(M_Z^2)$ = 0.1199 $\pm$ 0.0031和0.1185 $\pm$ 0.0023,分别考虑核和更高的扭曲修正在NLO和NNLO,并执行与其他报道的结果进行比较。所提取的关于价夸克分布和$α_{s}(M_Z^2)$值的结果与现有的理论模型符合得很好。

英文摘要:

A nonsinglet QCD analysis of neutrino-nucleon structure function is performed based on all the data for charged current neutrino-nucleon deep inelastic scattering (DIS) corresponds to NLO and NNLO approximations, with taking into account the nuclear and higher twist corrections. In this analysis, we extract $xu_v(x,Q^2)$ and $xd_v(x,Q^2)$ valence parton distribution functions (PDFs) in a wide range of $x$ and $Q^2$, and determine their parametrization with the correlated errors using the xFitter framework. Our results regarding valence-quark densities with their uncertainties are compared to the prediction extracted using other PDF sets from different groups. We determine $α_{s}(M_Z^2)$= 0.1199 $\pm$ 0.0031 and 0.1185 $\pm$ 0.0023 with considering the nuclear and higher twist corrections at the NLO and NNLO, respectively, and perform a comparison with other reported results. The extracted results regarding valence-quark distributions and the value of $α_{s}(M_Z^2)$ are in good agreement with available theoretical models.

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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