论文标题
有关锥形Parton分布的实验和晶格QCD数据的互补性
Complementarity of experimental and lattice QCD data on pion parton distributions
论文作者
论文摘要
我们在实验数据的蒙特卡洛全球QCD分析中提取益虫的分布函数（PDF），以及减少的IOFFE时间伪分布和矩阵元素的矩阵元素和晶状体QCD产生的电流相关器的矩阵元素。通过包括实验性和晶格QCD数据，我们的分析严格量化了PION PDF的不确定性以及晶状体QCD可观察物的固有的系统效应。减少的IOFFE时间伪分布可显着降低PDF上的不确定性，而电流相关器受到与晶格相关的系统效应的限制。与最近的现象学确定一致，发现大动量分数下乳头的价夸克分布的行为为$ \ sim（1-x）^{β_{\ rm eff}} $，$β_ {\ rm eff} \ yout。
We extract pion parton distribution functions (PDFs) in a Monte Carlo global QCD analysis of experimental data together with reduced Ioffe time pseudo-distributions and matrix elements of current-current correlators generated from lattice QCD. By including both experimental and lattice QCD data, our analysis rigorously quantifies both the uncertainties of the pion PDFs and systematic effects intrinsic to the lattice QCD observables. The reduced Ioffe time pseudo-distributions significantly decrease the uncertainties on the PDFs, while the current-current correlators are limited by the systematic effects associated with the lattice. Consistent with recent phenomenological determinations, the behavior of the valence quark distribution of the pion at large momentum fraction is found to be $\sim (1-x)^{ β_{\rm eff}}$ with $β_{\rm eff} \approx 1.0-1.2$.
