Measurement of transverse single-spin asymmetries of pi(0) and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions

doi:10.1103/PhysRevD.103.092009

	Measurement of transverse single-spin asymmetries of pi(0) and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions
	Adam, J.50; Adamczyk, L.53; Adams, J. R.62; Adkins, J. K.17; Agakishiev, G.34; Aggarwal, M. M.63; Ahammed, Z.24; Alekseev, I 54,57; Anderson, D. M.7; Aparin, A.34
刊名	PHYSICAL REVIEW D
	2021-05-27
卷号	103 期号:9 页码:14
ISSN号	2470-0010
DOI	10.1103/PhysRevD.103.092009
通讯作者	Adam, J.()
英文摘要	The STAR Collaboration reports measurements of the transverse single-spin asymmetry (TSSA) of inclusive pi(0) at center-of-mass energies (root s) of 200 GeV and 500 GeV in transversely polarized proton-proton collisions in the pseudo-rapidity region 2.7 to 4.0. The results at the two different energies show a continuous increase of the TSSA with Feynman-x, and, when compared to previous measurements, no dependence on root s from 19.4 GeV to 500 GeV is found. To investigate the underlying physics leading to this large TSSA, different topologies have been studied. pi(0) with no nearby particles tend to have a higher TSSA than inclusive pi(0). The TSSA for inclusive electromagnetic jets, sensitive to the Sivers effect in the initial state, is substantially smaller, but shows the same behavior as the inclusive pi(0) asymmetry as a function of Feynman-x. To investigate final-state effects, the Collins asymmetry of pi(0) inside electromagnetic jets has been measured. The Collins asymmetry is analyzed for its dependence on the pi(0) momentum transverse to the jet thrust axis and its dependence on the fraction of jet energy carried by the pi(0). The asymmetry was found to be small in each case for both center-of-mass energies. All the measurements are compared to QCD-based theoretical calculations for transverse-momentum-dependent parton distribution functions and fragmentation functions. Some discrepancies are found, which indicates new mechanisms might be involved.
资助项目	RHIC Operations Group and RCF at BNL ; NERSC Center at LBNL ; Open Science Grid consortium ; Office of Nuclear Physics within the U.S. DOE Office of Science ; U.S. National Science Foundation ; Ministry of Education and Science of the Russian Federation ; National Natural Science Foundation of China ; Chinese Academy of Science ; Ministry of Science and Technology of China ; Chinese Ministry of Education ; Higher Education Sprout Project by Ministry of Education at NCKU ; National Research Foundation of Korea ; Czech Science Foundation ; Ministry of Education, Youth and Sports of the Czech Republic ; Hungarian National Research, Development and Innovation Office ; New National Excellency Programme of the Hungarian Ministry of Human Capacities ; Department of Atomic Energy and Department of Science and Technology of the Government of India ; National Science Centre of Poland ; Ministry of Science, Education and Sports of the Republic of Croatia ; RosAtom of Russia ; German Bundesministerium fur Bildung, Wissenschaft, Forschung and Technologie (BMBF) ; Helmholtz Association ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) ; Japan Society for the Promotion of Science (JSPS)
WOS关键词	HADRON-HADRON ; HARD SCATTERING ; CROSS-SECTIONS ; AZIMUTHAL ; FRAGMENTATION ; UNIVERSALITY
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000655872600001
资助机构	RHIC Operations Group and RCF at BNL ; NERSC Center at LBNL ; Open Science Grid consortium ; Office of Nuclear Physics within the U.S. DOE Office of Science ; U.S. National Science Foundation ; Ministry of Education and Science of the Russian Federation ; National Natural Science Foundation of China ; Chinese Academy of Science ; Ministry of Science and Technology of China ; Chinese Ministry of Education ; Higher Education Sprout Project by Ministry of Education at NCKU ; National Research Foundation of Korea ; Czech Science Foundation ; Ministry of Education, Youth and Sports of the Czech Republic ; Hungarian National Research, Development and Innovation Office ; New National Excellency Programme of the Hungarian Ministry of Human Capacities ; Department of Atomic Energy and Department of Science and Technology of the Government of India ; National Science Centre of Poland ; Ministry of Science, Education and Sports of the Republic of Croatia ; RosAtom of Russia ; German Bundesministerium fur Bildung, Wissenschaft, Forschung and Technologie (BMBF) ; Helmholtz Association ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) ; Japan Society for the Promotion of Science (JSPS)
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137166]
专题	中国科学院近代物理研究所
通讯作者	Adam, J.
作者单位	1.Rutgers State Univ, Piscataway, NJ 08854 USA 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 3.Southern Connecticut State Univ, New Haven, CT 06515 USA 4.SUNY Stony Brook, Stony Brook, NY 11794 USA 5.Tech Univ Darmstadt, D-64289 Darmstadt, Germany 6.Temple Univ, Philadelphia, PA 19122 USA 7.Texas A&M Univ, College Stn, TX 77843 USA 8.Tsinghua Univ, Beijing 100084, Peoples R China 9.Univ Calif Berkeley, Berkeley, CA 94720 USA 10.Univ Calif Davis, Davis, CA 95616 USA
推荐引用方式 GB/T 7714	Adam, J.,Adamczyk, L.,Adams, J. R.,et al. Measurement of transverse single-spin asymmetries of pi(0) and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions[J]. PHYSICAL REVIEW D,2021,103(9):14.
APA	Adam, J..,Adamczyk, L..,Adams, J. R..,Adkins, J. K..,Agakishiev, G..,...&Zyzak, M..(2021).Measurement of transverse single-spin asymmetries of pi(0) and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions.PHYSICAL REVIEW D,103(9),14.
MLA	Adam, J.,et al."Measurement of transverse single-spin asymmetries of pi(0) and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions".PHYSICAL REVIEW D 103.9(2021):14.