J/psi polarization in p plus p collisions at root s=200 GeV in STAR
文献类型：期刊论文
| 作者 | 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
 |
| 出版日期 | 2014-12-12 |
| 卷号 | 739页码:180-188 |
| ISSN号 | 0370-2693 |
| 关键词 | Charmonia Polarization Spin Alignment Star Rhic |
| 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. |
| WOS关键词 | HADRONIC PRODUCTION ; J-PSI ; HEAVY QUARKONIUM ; TEV ; DISTRIBUTIONS ; UPSILON ; PROMPT ; GLUON |
| 资助项目 | National Research Foundation[NRF-2012004024] |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000346002000029 |
| 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. |
入库方式： OAI收割
来源：近代物理研究所
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