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The Gross-Llewellyn Smith sum rule up to O(αs4)-order QCD corrections
Nuclear Physics B ( IF 2.8 ) Pub Date : 2021-06-16 , DOI: 10.1016/j.nuclphysb.2021.115466
Xu-Dong Huang , Xing-Gang Wu , Qing Yu , Xu-Chang Zheng , Jun Zeng

In the paper, we analyze the properties of Gross-Llewellyn Smith (GLS) sum rule by using the O(αs4)-order QCD corrections with the help of principle of maximum conformality (PMC). By using the PMC single-scale approach, we obtain an accurate renormalization scale-and-scheme independent fixed-order pQCD contribution for GLS sum rule, e.g. SGLS(Q02=3GeV2)|PMC=2.5590.024+0.023, where the error is squared average of those from Δαs(MZ), the predicted O(αs5)-order terms predicted by using the Padé approximation approach. After applying the PMC, a more convergent pQCD series has been obtained, and the contributions from the unknown higher-order terms are highly suppressed. In combination with the nonperturbative high-twist contribution, our final prediction of GLS sum rule agrees well with the experimental data given by the CCFR collaboration.



中文翻译:

Gross-Llewellyn Smith 总和规则高达 (α4)- 阶 QCD 修正

在本文中,我们通过使用以下公式来分析 Gross-Llewellyn Smith (GLS) 求和规则的性质 (α4)借助最大保形原则 (PMC) 进行 - 阶 QCD 校正。通过使用 PMC 单尺度方法,我们为 GLS 求和规则获得了精确的重整化尺度和方案独立的固定阶 pQCD 贡献,例如GLS(02=3电子伏特2)|管理中心=2.559-0.024+0.023,其中误差是来自 Δα(Z), 预测 (α5)使用 Padé 近似方法预测的阶项。应用PMC后,得到了更收敛的pQCD级数,高度抑制了未知高阶项的贡献。结合非微扰高扭曲贡献,我们对 GLS 总和规则的最终预测与 CCFR 合作提供的实验数据非常吻合。

更新日期:2021-06-22
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