论文标题
晶格核子等异卵布在物理限极限制的非极化part顿分布
Lattice Nucleon Isovector Unpolarized Parton Distribution in the Physical-Continuum Limit
论文作者
论文摘要
我们使用大型摩托明有效理论（lamet）介绍了在物理限极限制的核子等异源分布分布函数（PDFS）的第一个晶格-QCD计算。晶格结果是使用具有多个海带质量的合奏来计算的，其中最轻的质量约为135〜MEV，3个晶格间距$ a \ in [0.06,0.12] $ 〜FM，以及$m_πl$ ryg 3.3至5.5的多卷。我们同时执行手性 - 核定外推，以获得RI/MOM重新归一化的核子基质元件，并在物理脉冲质量的连续性极限中具有各种Wilson-Link位移。然后，我们将一环扰动匹配应用于准PDF，以获得LightCone PDF。我们发现晶格间距的依赖性比这些叶片基质元素的质量质量和晶格体积的依赖性大得多。我们的物理限极限制了非偏振器核子PDF与全局PDF结果一致。
We present the first lattice-QCD calculation of the nucleon isovector unpolarized parton distribution functions (PDFs) at the physical-continuum limit using Large-Momentum Effective Theory (LaMET). The lattice results are calculated using ensembles with multiple sea pion masses with the lightest one around 135~MeV, 3 lattice spacings $a\in[0.06,0.12]$~fm, and multiple volumes with $M_πL$ ranging 3.3 to 5.5. We perform a simultaneous chiral-continuum extrapolation to obtain RI/MOM renormalized nucleon matrix elements with various Wilson-link displacements in the continuum limit at physical pion mass. Then, we apply one-loop perturbative matching to the quasi-PDFs to obtain the lightcone PDFs. We find the lattice-spacing dependence to be much larger than the dependence on pion mass and lattice volume for these LaMET matrix elements. Our physical-continuum limit unpolarized isovector nucleon PDFs are found to be consistent with global-PDF results.
