论文标题
使用晶格QCD的核子等异位动量分数，螺旋和横向力矩
Nucleon isovector momentum fraction, helicity and transversity moment using Lattice QCD
论文作者
论文摘要
我们介绍了我们最近的高精度计算（Phys。V.D102（2020）No.5，054512和JHEP 04（2021）044，JHEP 21（2020）004）nucleon Isovector偏振，未极化，未极化和横向分布的第一瞬间，即跨度，动量，旋转，螺旋力矩和跨度动力。我们使用标准方法来计算这些矩（通过扭曲两个操作员的矩阵元素），并对系统不确定性的来源进行详细分析，尤其是激发状态的贡献。我们的计算是使用两个不同的晶格设置（Hisq和Clover-On-Clover）进行的，每个设置都有几个合奏。它们提供一致的结果，与全球拟合分析一致。
We present our recent high precision calculations (Phys. Rev. D102 (2020) no.5, 054512 and JHEP 04 (2021) 044, JHEP 21 (2020) 004) of the first moment of nucleon isovector polarized, unpolarized and transversity distributions, i.e., momentum fraction, helicity and transversity moment, respectively. We use the standard method for the calculation of these moments (via matrix elements of twist two operators), and carry out a detailed analysis of the sources of systematic uncertainty, in particular of excited state contributions. Our calculations have been performed using two different lattice setups (Clover-on-HISQ and Clover-on-Clover), each with several ensembles. They give consistent results that are in agreement with global fit analyses.
