J/psi polarization in p plus p collisions at root s=200 GeV in STAR

doi:10.1016/j.physletb.2014.10.049

	J/psi polarization in p plus p collisions at root s=200 GeV in STAR
	Adamczyk, L.1; Adkins, J. K.23; Agakishiev, G.21; Aggarwal, M. M.35; Ahammed, Z.54; Alekseev, I.19; Alford, J.22; Anson, C. D.32; Aparin, A.21; Arkhipkin, D.4
刊名	PHYSICS LETTERS B
	2014-12-12
卷号	739 页码:180-188
关键词	Charmonia Polarization Spin Alignment Star Rhic
ISSN号	0370-2693
DOI	10.1016/j.physletb.2014.10.049
文献子类	Article
英文摘要	We report on a polarization measurement of inclusive J/psi mesons in the di-electron decay channel at mid-rapidity at 2 < p(T) < 6 GeV/c in p + p collisions at root s = 200 GeV. Data were taken with the STAR detector at RHIC. The J/psi polarization measurement should help to distinguish between different models of the J/psi production mechanism since they predict different p(T) dependences of the J/psi polarization. In this analysis, J/psi is studied in the helicity frame. The polarization parameter lambda(theta) measured at RHIC becomes smaller towards high p(T), indicating more longitudinal J/psi polarization as p(T) increases. The result is compared with predictions of presently available models. (C) 2014 The Authors. Published by Elsevier B.V.
资助项目	National Research Foundation[NRF-2012004024]
WOS关键词	HADRONIC PRODUCTION ; J-PSI ; HEAVY QUARKONIUM ; TEV ; DISTRIBUTIONS ; UPSILON ; PROMPT ; GLUON
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000346002000029
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49833]
专题	中国科学院近代物理研究所
通讯作者	Trzeciak, B. A.
作者单位	1.AGH Univ Sci & Technol, Krakow, Poland 2.Argonne Natl Lab, Argonne, IL 60439 USA 3.Univ Birmingham, Birmingham, W Midlands, England 4.Brookhaven Natl Lab, Upton, NY 11973 USA 5.Univ Calif Berkeley, Berkeley, CA 94720 USA 6.Univ Calif Davis, Davis, CA 95616 USA 7.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 8.Univ Estadual Campinas, Sao Paulo, Brazil 9.Cent China Normal Univ HZNU, Wuhan 430079, Peoples R China 10.Univ Illinois, Chicago, IL 60607 USA
推荐引用方式 GB/T 7714	Adamczyk, L.,Adkins, J. K.,Agakishiev, G.,et al. J/psi polarization in p plus p collisions at root s=200 GeV in STAR[J]. PHYSICS LETTERS B,2014,739:180-188.
APA	Adamczyk, L..,Adkins, J. K..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,...&Zyzak, M..(2014).J/psi polarization in p plus p collisions at root s=200 GeV in STAR.PHYSICS LETTERS B,739,180-188.
MLA	Adamczyk, L.,et al."J/psi polarization in p plus p collisions at root s=200 GeV in STAR".PHYSICS LETTERS B 739(2014):180-188.