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Liang, Jian; Sun, Mingyang; Yang, Yi-Bo; Draper, Terrence; Liu, Keh-Fei
Ratio of strange to u/d momentum fraction in disconnected insertions
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordLATTICE QUARKS
AbstractThe 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.
2020
ISSN1550-7998
Volume102Issue:3Pages:34514
Cooperation Status国际
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.102.034514
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27457
CollectionSCI期刊论文
Affiliation1.[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
Recommended Citation
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.
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