Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV

doi:10.1103/PhysRevD.86.051101

	Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV
	Adamczyk, L.1; Agakishiev, G.20; Aggarwal, M. M.31; Ahammed, Z.50; Alakhverdyants, A. V.20; Alekseev, I.18; Alford, J.22; Anderson, B. D.22; Anson, C. D.29; Arkhipkin, D.3
刊名	PHYSICAL REVIEW D
	2012-09-05
卷号	86
ISSN号	1550-7998
DOI	10.1103/PhysRevD.86.051101
文献子类	Article
英文摘要	Measurements of the differential cross section and the transverse single-spin asymmetry, A(N), vs x(F) for pi(0) and eta mesons are reported for 0.4 < x(F) < 0.75 at an average pseudorapidity of 3.68. A data sample of approximately 6.3 pb(-1) was analyzed, which was recorded during p(up arrow) + p collisions at root s = 200 GeV by the STAR experiment at RHIC. The average transverse beam polarization was 56%. The cross section for pi(0), including the previously unmeasured region of x(F) > 0.55, is consistent with a perturbative QCD prediction, and the eta/pi(0) cross-section ratio agrees with existing midrapidity measurements. For 0.55 < x(F) < 0.75, the average A(N) for eta is 0.210 +/- 0.056, and that for pi(0) is 0.081 +/- 0.016. The probability that these two asymmetries are equal is similar to 3%.
WOS关键词	FRAGMENTATION ; POLARIZATION ; GEV/C ; BEAM
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000308344600001
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/48875]
专题	中国科学院近代物理研究所
通讯作者	Adamczyk, L.
作者单位	1.AGH Univ Sci & Technol, Krakow, Poland 2.Argonne Natl Lab, Argonne, IL 60439 USA 3.Brookhaven Natl Lab, Upton, NY 11973 USA 4.Univ Calif Berkeley, Berkeley, CA 94720 USA 5.Univ Calif Davis, Davis, CA 95616 USA 6.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 7.Univ Estadual Campinas, Sao Paulo, Brazil 8.Cent China Normal Univ HZNU, Wuhan 430079, Peoples R China 9.Univ Illinois, Chicago, IL 60607 USA 10.Cracow Univ Technol, Krakow, Poland
推荐引用方式 GB/T 7714	Adamczyk, L.,Agakishiev, G.,Aggarwal, M. M.,et al. Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV[J]. PHYSICAL REVIEW D,2012,86.
APA	Adamczyk, L..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,Alakhverdyants, A. V..,...&STAR Collaboration.(2012).Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV.PHYSICAL REVIEW D,86.
MLA	Adamczyk, L.,et al."Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV".PHYSICAL REVIEW D 86(2012).