论文标题
从晶格QCD计算中提取近代到接头的pdfs
Extraction of Next-to-Next-to-Leading-Order PDFs from Lattice QCD Calculations
论文作者
论文摘要
我们首次介绍近代到接头的系数函数，以匹配在晶格QCD中可以计算出的位置空间中的非单词夸克相关函数，以与Parton分布函数（PDFS）相匹配。使用从实验数据中提取的PDF和我们计算出的匹配系数，我们预测价值Quark相关函数可以与晶格QCD计算相遇。通过高阶匹配系数大大降低了我们的预测的不确定性。通过执行傅立叶变换，我们还获得了相应的准PDF和伪PDF的匹配系数。我们的计算方法可以很容易地概括，以评估海夸克和gluon相关函数的匹配系数，从而使该程序从晶格QCD计算中提取HADRON的派对结构，以与实验测量值相当并与之互补。
We present for the first time complete next-to-next-to-leading-order coefficient functions to match flavor non-singlet quark correlation functions in position space, which are calculable in lattice QCD, to parton distribution functions (PDFs). Using PDFs extracted from experimental data and our calculated matching coefficients, we predict valence-quark correlation functions that can be confronted by lattice QCD calculations. The uncertainty of our predictions is greatly reduced with higher order matching coefficients. By performing Fourier transformation, we also obtain matching coefficients for corresponding quasi-PDFs and pseudo-PDFs. Our method of calculations can be readily generalized to evaluate the matching coefficients for sea-quark and gluon correlation functions, putting the program to extract partonic structure of hadrons from lattice QCD calculations to be comparable with and complementary to that from experimental measurements.
