Measurement of the W -> e nu and Z/gamma* -> e(+)e(-) Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at root s = 500 GeV
文献类型：期刊论文
| 作者 | Adamczyk, L.9; Agakishiev, G.19; Aggarwal, M. M.30; Ahammed, Z.48; Alakhverdyants, A. V.19; Alekseev, I.17; Alford, J.20; Anderson, B. D.20; Anson, C. D.28; Arkhipkin, D.2 |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2012-05-16 |
| 卷号 | 85 |
| ISSN号 | 1550-7998 |
| DOI | 10.1103/PhysRevD.85.092010 |
| 文献子类 | Article |
| 英文摘要 | We report measurements of the charge-separated W+(-)-> e(+(-))+nu(e)(nu-(e)) and Z/gamma*-> e(+)e(-) production cross sections at mid-rapidity in proton-proton collisions at root s=500 GeV. These results are based on 13.2 pb(-1) of data recorded in 2009 by the STAR detector at RHIC. Production cross sections for W bosons that decay via the e nu channel were measured to be sigma(pp -> W+X)center dot BR(W+-> e(+)nu e)=117.3 +/- 5.9(stat)+/- 6.2(syst)+/- 15.2(lumi) pb, and sigma(pp -> W-X)center dot BR(W--> e(-)(nu)over bar(-)e)=43.3 +/- 4.6(stat)+/- 3.4(syst)+/- 5.6(lumi) pb. For Z/gamma* production, sigma(pp -> Z/gamma*X)center dot BR(Z/gamma*-> e(+)e(-))=7.7 +/- 2.1(stat)-0.9+0.5(syst)+/- 1.0(lumi) pb was measured for di-lepton invariant masses m(e+e-) between 70 and 110 GeV/c(2). First measurements of the W cross section ratio, sigma(pp -> W+X)/sigma(pp -> W-X), at root v=500 GeV are also reported. Theoretical predictions, calculated using recent parton distribution functions, are found to agree with the measured cross sections. |
| WOS关键词 | CERN PBARP COLLIDER ; P(P)OVER-BAR COLLISIONS ; ELECTROMAGNETIC CALORIMETER ; PARTON DISTRIBUTIONS ; TEV ; ASYMMETRY ; DETECTOR ; BOSON |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000304105400003 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://119.78.100.186/handle/113462/47813]  |
| 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.Argonne Natl Lab, Argonne, IL 60439 USA 2.Brookhaven Natl Lab, Upton, NY 11973 USA 3.Univ Calif Berkeley, Berkeley, CA 94720 USA 4.Univ Calif Davis, Davis, CA 95616 USA 5.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 6.Univ Estadual Campinas, Sao Paulo, Brazil 7.Cent China Normal Univ HZNU, Wuhan 430079, Peoples R China 8.Univ Illinois, Chicago, IL 60607 USA 9.Krakow Univ Technol, Krakow, Poland 10.Creighton Univ, Omaha, NE 68178 USA |
| 推荐引用方式 GB/T 7714 | Adamczyk, L.,Agakishiev, G.,Aggarwal, M. M.,et al. Measurement of the W -> e nu and Z/gamma* -> e(+)e(-) Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at root s = 500 GeV[J]. PHYSICAL REVIEW D,2012,85. |
| APA | Adamczyk, L..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,Alakhverdyants, A. V..,...&STAR Collaboration.(2012).Measurement of the W -> e nu and Z/gamma* -> e(+)e(-) Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at root s = 500 GeV.PHYSICAL REVIEW D,85. |
| MLA | Adamczyk, L.,et al."Measurement of the W -> e nu and Z/gamma* -> e(+)e(-) Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at root s = 500 GeV".PHYSICAL REVIEW D 85(2012). |
入库方式： OAI收割
来源：近代物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。