Ratio of strange to u/d momentum fraction in disconnected insertions

doi:10.1103/PhysRevD.102.034514

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	Ratio of strange to u/d momentum fraction in disconnected insertions
	Liang, Jian ; Sun, Mingyang ; Yang, Yi-Bo ; Draper, Terrence ; Liu, Keh-Fei
刊名	PHYSICAL REVIEW D
	2020
卷号	102 期号:3 页码:34514
关键词	LATTICE QUARKS
ISSN号	1550-7998
DOI	10.1103/PhysRevD.102.034514
英文摘要	The ratio of the strange quark momentum fraction < x >(s+(s) over bar) to that of light quark u or d in disconnected insertions (DI) is calculated on the lattice with overlap fermions on four domain wall fermion ensembles. These ensembles cover three lattice spacings, three volumes and several pion masses including the physical one, from which a global fitting is carried out. A complete nonperturbative renormalization and the mixing between the quark and glue operators are taken into account. We fmd the ratio to be < x > s+(s) over bar/< x > u+(u) over bar (DI) = 0.795(79)(77) at mu = 2 GeV in the (MS) over bar scheme. This ratio can be used as a constraint to better determine the strange parton distribution especially in the small x region in the global fittings of PDFs when the connected and disconnected sea are fitted and evolved separately, demonstrating a new way that connects lattice calculations with global analyses.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27457]
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.[Liang, Jian 2.Sun, Mingyang 3.Draper, Terrence 4.Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA 5.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liang, Jian,Sun, Mingyang,Yang, Yi-Bo,et al. Ratio of strange to u/d momentum fraction in disconnected insertions[J]. PHYSICAL REVIEW D,2020,102(3):34514.
APA	Liang, Jian,Sun, Mingyang,Yang, Yi-Bo,Draper, Terrence,&Liu, Keh-Fei.(2020).Ratio of strange to u/d momentum fraction in disconnected insertions.PHYSICAL REVIEW D,102(3),34514.
MLA	Liang, Jian,et al."Ratio of strange to u/d momentum fraction in disconnected insertions".PHYSICAL REVIEW D 102.3(2020):34514.