ITP OpenIR  > SCI期刊论文
Lin, HW; Chen, JW; Ji, XD; Jin, LC; Li, RZ; Liu, YS; Yang, YB; Zhang, JH; Zhao, Y4
Proton Isovector Helicity Distribution on the Lattice at Physical Pion Mass
Source PublicationPHYSICAL REVIEW LETTERS
Language英语
AbstractWe present a state-of-the-art calculation of the isovector quark-helicity Bjorken-x distribution in the proton using lattice-QCD ensembles at the physical pion mass. We compute quasidistributions at proton momenta P-z is an element of {2.2, 2.6, 3.0} GeV on the lattice and match them systematically to the physical parton distribution using the large-momentum effective theory. We reach an unprecedented precision through high statistics in simulations, large-momentum proton matrix elements, and control of excited-state contamination. The resulting distribution with combined statistical and systematic errors is in agreement with the latest phenomenological analysis of the spin-dependent experimental data, in particular, Delta(u) over bar (x) > Delta(d) over bar (x).
2018
ISSN0031-9007
Volume121Issue:24Pages:242003
Subject AreaPhysics
MOST Discipline CataloguePhysics, Multidisciplinary
DOI10.1103/PhysRevLett.121.242003
Indexed BySCIE
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23526
CollectionSCI期刊论文
Affiliation1.Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
2.Michigan State Univ, Dept Computat Math, E Lansing, MI 48824 USA
3.Natl Taiwan Univ, Dept Phys, Ctr Theoret Phys, Taipei 106, Taiwan
4.Natl Taiwan Univ, Leung Ctr Cosmol & Particle Astrophys, Taipei 106, Taiwan
5.MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA
6.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China
7.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
8.Univ Maryland, Maryland Ctr Fundamental Phys, Dept Phys, College Pk, MD 20742 USA
9.Univ Connecticut, Dept Phys, Storrs, CT 06269 USA
10.Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA
11.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
12.Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany
Recommended Citation
GB/T 7714
Lin, HW,Chen, JW,Ji, XD,et al. Proton Isovector Helicity Distribution on the Lattice at Physical Pion Mass[J]. PHYSICAL REVIEW LETTERS,2018,121(24):242003.
APA Lin, HW.,Chen, JW.,Ji, XD.,Jin, LC.,Li, RZ.,...&Zhao, Y.(2018).Proton Isovector Helicity Distribution on the Lattice at Physical Pion Mass.PHYSICAL REVIEW LETTERS,121(24),242003.
MLA Lin, HW,et al."Proton Isovector Helicity Distribution on the Lattice at Physical Pion Mass".PHYSICAL REVIEW LETTERS 121.24(2018):242003.
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