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.
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页数：13
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