Moments of Ioffe time parton distribution functions from non-local matrix elements

被引：83

作者：

Karpie, Joseph ^{[1
,2
]}

Orginos, Kostas ^{[1
,2
]}

Zafeiropoulos, Savvas ^{[3
]}

机构：

[1] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[2] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[3] Heidelberg Univ, Inst Theoret Phys, Philosophenweg 12, D-69120 Heidelberg, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 11期

基金：

美国国家科学基金会;

关键词：

Lattice QCD; Lattice Quantum Field Theory; NONPERTURBATIVE RENORMALIZATION;

D O I：

10.1007/JHEP11(2018)178

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We examine the relation of moments of parton distribution functions to matrix elements of non-local operators computed in lattice quantum chromodynamics. We argue that after the continuum limit is taken, these non-local matrix elements give access to moments that are fi nite and can be matched to those de fi ned in the MS scheme. We demonstrate this fact with a numerical computation of moments through non-local matrix elements in the quenched approximation and we fi nd that these moments are in agreement with the moments obtained from direct computations of local twist-2 matrix elements in the quenched approximation.

引用

页数：13

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