Proton Mass Decomposition from the QCD Energy Momentum Tensor

doi:10.1103/PhysRevLett.121.212001

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	Proton Mass Decomposition from the QCD Energy Momentum Tensor
	Yang, YB ; Liang, J ; Bi, YJ ; Chen, Y 1,2; Draper, T ; Liu, KF ; Liu, ZF
刊名	PHYSICAL REVIEW LETTERS
	2018
卷号	121 期号:21 页码:212001
关键词	LATTICE NUCLEON
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.121.212001
英文摘要	We report results on the proton mass decomposition and also on related quark and glue momentum fractions. The results are based on overlap valence fermions on four ensembles of N-f = 2 + 1 domain wall fermion configurations with three lattice spacings and three volumes, and several pion masses including the physical pion mass. With fully nonperturbative renormalization (and universal normalization on both quark and gluon), we find that the quark energy and glue field energy contribute 32(4)(4)% and 36(5)(4)% respectively in the (MS) over bar (modified minimal substraction) scheme at is mu = 2 GeV. A quarter of the trace anomaly gives a 23(1)(1)% contribution to the proton mass based on the sum rule, given 9(2)(1)% contribution from the u, d, and s quark scalar condensates. The u, d, s, and glue momentum fractions in the (MS) over bar scheme are in good agreement with global analyses at it mu = 2 GeV.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22785]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA 3.Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA 4.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China 5.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, YB,Liang, J,Bi, YJ,et al. Proton Mass Decomposition from the QCD Energy Momentum Tensor[J]. PHYSICAL REVIEW LETTERS,2018,121(21):212001.
APA	Yang, YB.,Liang, J.,Bi, YJ.,Chen, Y.,Draper, T.,...&Liu, ZF.(2018).Proton Mass Decomposition from the QCD Energy Momentum Tensor.PHYSICAL REVIEW LETTERS,121(21),212001.
MLA	Yang, YB,et al."Proton Mass Decomposition from the QCD Energy Momentum Tensor".PHYSICAL REVIEW LETTERS 121.21(2018):212001.