Di-electron spectrum at mid-rapidity in p+p collisions at root s=200 GeV
文献类型：期刊论文
| 作者 | Adamczyk, L ; Agakishiev, G ; Cai, XZ（蔡翔舟） ; Chen, JH（陈金辉） ; Han, LX ; Ma, GL（马国亮） ; Ma, YG（马余刚） ; Tian, J（田健） ; Xue, L（薛亮） ; Zhang, S（张松） ; Zhao, J ; Zhong, C（钟晨） ; Zhu, YH ; Zoulkarneeva, Y |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2012 |
| 卷号 | 86期号:2 |
| ISSN号 | 0556-2813 |
| 英文摘要 | We report on the mid-rapidity mass spectrum of di-electrons and cross sections of pseudoscalar and vector mesons via e(+) e(-) decays, from root s = 200 GeV p + p collisions, measured by the large-acceptance experiment STAR at the Relativistic Heavy Ion Collider. The ratio of the di-electron continuum to the combinatorial background is larger than 10% over the entire mass range. Simulations of di-electrons from light-meson decays and heavy-flavor decays (charmonium and open charm correlation) are found to describe the data. The extracted omega -> e(+) e(-) invariant yields are consistent with previous measurements. The mid-rapidity yields (dN/dy) of phi and J/psi are extracted through their di-electron decay channels and are consistent with the previous measurements of phi -> K+ K- and J/psi -> e(+) e(-). Our results suggest a new upper limit of the branching ratio of the eta -> e(+) e(-) of 1.7 x 10(-5) at the 90% confidence level. |
| 语种 | 英语 |
| WOS记录号 | WOS:000307274900004 |
| 公开日期 | 2013-12-05 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/13129]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Adamczyk, L,Agakishiev, G,Cai, XZ,et al. Di-electron spectrum at mid-rapidity in p+p collisions at root s=200 GeV[J]. PHYSICAL REVIEW C,2012,86(2). |
| APA | Adamczyk, L.,Agakishiev, G.,Cai, XZ.,Chen, JH.,Han, LX.,...&Zoulkarneeva, Y.(2012).Di-electron spectrum at mid-rapidity in p+p collisions at root s=200 GeV.PHYSICAL REVIEW C,86(2). |
| MLA | Adamczyk, L,et al."Di-electron spectrum at mid-rapidity in p+p collisions at root s=200 GeV".PHYSICAL REVIEW C 86.2(2012). |
入库方式： OAI收割
来源：上海应用物理研究所
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