Joó Bálint, Karpie Joseph, Orginos Kostas, Radyushkin Anatoly V, Richards David G, Zafeiropoulos Savvas
Oak Ridge Leadership Facility, Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, Tennessee 37831, USA.
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
Phys Rev Lett. 2020 Dec 4;125(23):232003. doi: 10.1103/PhysRevLett.125.232003.
We present results for the unpolarized parton distribution function of the nucleon computed in lattice QCD at the physical pion mass. This is the first study of its kind employing the method of Ioffe time pseudodistributions. Beyond the reconstruction of the Bjorken-x dependence, we also extract the lowest moments of the distribution function using the small Ioffe time expansion of the Ioffe time pseudodistribution. We compare our findings with the pertinent phenomenological determinations.
我们展示了在物理π介子质量下,通过格点量子色动力学计算得到的核子非极化部分子分布函数的结果。这是首次采用约菲时间赝分布方法进行此类研究。除了重构比约肯x依赖性之外,我们还利用约菲时间赝分布的小约菲时间展开来提取分布函数的最低矩。我们将我们的结果与相关的唯象学测定进行比较。