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Di-electron spectrum at mid-rapidity in p+p collisions at root s=200 GeV
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
2012
Source PublicationPHYSICAL REVIEW C
ISSN0556-2813
Volume86Issue:2
AbstractWe 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.
Language英语
Funding Project应物所项目组
WOS IDWOS:000307274900004
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13129
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
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).
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