Proton Isovector Helicity Distribution on the Lattice at Physical Pion Mass

doi:10.1103/PhysRevLett.121.242003

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	Proton Isovector Helicity Distribution on the Lattice at Physical Pion Mass
	Lin, HW ; Chen, JW ; Ji, XD ; Jin, LC ; Li, RZ ; Liu, YS ; Yang, YB ; Zhang, JH ; Zhao, Y 4
刊名	PHYSICAL REVIEW LETTERS
	2018
卷号	121 期号:24 页码:242003
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.121.242003
英文摘要	We 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).
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/311006/23526]
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.Michigan State Univ, Dept Computat Math, E Lansing, MI 48824 USA 2.Michigan State Univ, Dept Phys & Astron, 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
推荐引用方式 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.