arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0810.4893hep-ph
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更新PDF的全局拟合,包括低Q DIS数据

Update of the global fit of PDFs including the low-Q DIS data

S. Alekhin, S. Kulagin, R. Petti

摘要:

我们执行的下一个到下一个领先的顺序(NNLO)QCD的PDF使用包容性的带电轻子和中微子DIS数据的全球拟合到Q = 1 GeV。我们还考虑了中微子-核子双μ子产生的数据,这使我们能够解开奇怪的海洋分布。拟合结果为χ^2/NDP = 5150/4338 = 1.2,表明分析中使用的数据集具有良好的一致性。结果α_s(M_Z)= 0.1136 ± 0.0007(exp.)是在一个很好的协议与以前的版本的配合与更严格的削减Q。这种分析使我们能够提高PDF的准确性。确定了中微子-核子结构函数F_2和xF_3的HT项,发现在考虑电荷因子的情况下,前者与带电轻子的HT项一致。

英文摘要:

We perform the next-to-next-leading-order (NNLO) QCD global fit of PDFs using inclusive charged-lepton and neutrino DIS data down to Q = 1 GeV. We also consider the data on neutrino-nucleon dimuon production, that allows us to disentangle the strange sea distribution. The fit results in χ^2/NDP = 5150/4338 = 1.2 that demonstrates a good consistency of the data sets used in analysis. The resulting value of α_s(M_Z) = 0.1136+- 0.0007(exp.) is in a good agreement with the previous version of the fit with a more stringent cut on Q. This analysis allows us to improve the accuracy of PDFs. The HT terms of the neutrino-nucleon structure functions F_2 and xF_3 are determined, the former is found to be consistent with one for the charged-leptons if the charge factor is taken into account.

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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