Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at root s=510 GeV

doi:10.1103/PhysRevD.99.051102

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	Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at root s=510 GeV
	Adam, J ; Adamczyk, L ; Adams, JR ; Adkins, JK ; Agakishiev, G ; Aggarwal, MM ; Ahammed, Z ; Alekseev, I ; Anderson, DM ; Aoyama, R
刊名	PHYSICAL REVIEW D
	2019
卷号	99 期号:5 页码:—
关键词	LIGHT-QUARK SEA PARTON DISTRIBUTIONS FLAVOR ASYMMETRY NUCLEON PHYSICS
ISSN号	2470-0010
DOI	10.1103/PhysRevD.99.051102
文献子类	期刊论文
英文摘要	We report new STAR measurements of the single-spin asymmetries A(L) for W+ and W- bosons produced in polarized proton-proton collisions at root s = 510 GeV as a function of the decay-positron and decay-electron pseudorapidity. The data were obtained in 2013 and correspond to an integrated luminosity of 250 pb(-1). The results are combined with previous results obtained with 86 pb(-1). A comparison with theoretical expectations based on polarized lepton-nucleon deep-inelastic scattering and prior polarized proton-proton data suggests a difference between the (u) over bar and (b) over bar quark helicity distributions for 0.05 < x < 0.25. In addition, we report new results for the double-spin asymmetries A(LL) for W-+/-, as well as A(L) for Z/gamma* production and subsequent decay into electron-positron pairs.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31696]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Univ Houston, Houston, TX 77204 USA; 2.Abilene Christian Univ, Abilene, TX 79699 USA; 3.AGH Univ Sci & Technol, FPACS, PL-30059 Krakow, Poland; 4.Alikhanov Inst Theoret & Expt Phys, Moscow 117218, Russia; 5.Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA; 6.Brookhaven Natl Lab, Upton, NY 11973 USA; 7.Univ Calif Berkeley, Berkeley, CA 94720 USA; 8.Univ Calif Davis, Davis, CA 95616 USA; 9.Univ Calif Los Angeles, Los Angeles, CA 90095 USA; 10.Univ Calif Riverside, Riverside, CA 92521 USA;
推荐引用方式 GB/T 7714	Adam, J,Adamczyk, L,Adams, JR,et al. Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at root s=510 GeV[J]. PHYSICAL REVIEW D,2019,99(5):—.
APA	Adam, J.,Adamczyk, L.,Adams, JR.,Adkins, JK.,Agakishiev, G.,...&Zyzak, M.(2019).Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at root s=510 GeV.PHYSICAL REVIEW D,99(5),—.
MLA	Adam, J,et al."Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at root s=510 GeV".PHYSICAL REVIEW D 99.5(2019):—.