Nonperturbatively renormalized glue momentum fraction at the physical pion mass from lattice QCD

doi:10.1103/PhysRevD.98.074506

	Nonperturbatively renormalized glue momentum fraction at the physical pion mass from lattice QCD
	XQCD Collaboration
刊名	PHYSICAL REVIEW D
	2018
卷号	98 期号:7 页码:74506
ISSN号	2470-0010
DOI	10.1103/PhysRevD.98.074506
文献子类	Article
英文摘要	We present the first nonperturbatively renormalized determination of the glue momentum fraction < x >(g) in the nucleon, based on lattice-QCD simulations at the physical pion mass using the cluster-decomposition error reduction technique. We provide the first practical strategy to renormalize the gauge energy-momentum tensor nonperturbatively in the regularization-independent momentum-subtraction (R1/MOM) scheme and convert the results to the (MS) over bar scheme with one-loop matching. The simulation results show that the cluster-decomposition error reduction technique can reduce the statistical uncertainty of its renormalization constant by a factor of O(300) in calculations using a typical state-of-the-art lattice volume, and the nonperturbatively renormalized < x >(g) is shown to be independent of the lattice definitions of the gauge energy-momentum tensor up to discretization errors. We determine the renormalized < x >((MS) over bar)(g) (2 GeV) to be 0.47(4)(11) at the physical pion mass, which is consistent with the experimentally determined value.
电子版国际标准刊号	2470-0029
WOS关键词	OPERATORS ; NUCLEON
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000447187400004
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286412]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	XQCD Collaboration. Nonperturbatively renormalized glue momentum fraction at the physical pion mass from lattice QCD[J]. PHYSICAL REVIEW D,2018,98(7):74506.
APA	XQCD Collaboration.(2018).Nonperturbatively renormalized glue momentum fraction at the physical pion mass from lattice QCD.PHYSICAL REVIEW D,98(7),74506.
MLA	XQCD Collaboration."Nonperturbatively renormalized glue momentum fraction at the physical pion mass from lattice QCD".PHYSICAL REVIEW D 98.7(2018):74506.