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J/psi production via photon fragmentation at hadron colliders
He ZG(何志国); Li R(李荣); 王建雄;He, ZG; Li, R; Wang, JX
2012
发表期刊PHYSICS LETTERS B
卷号711期号:5页码:371-375
摘要The transverse momentum (p(t)) distributions of production and polarization for J/psi measured by CDF Collaboration are still challenging our understanding of the heavy quarkonium production mechanism even with recent significant theoretical progresses on the next-to-leading-order (NLO) QCD calculation. We investigate an interesting mechanism for J/psi production at hadron collider, pp((p) over bar) -> gamma* (J/psi) + X with J/psi from a virtual photon gamma* fragmentation. Our calculations show that the J/psi p(t) distribution in the photon fragmentation process up to NLO in alpha(s) will be larger than that of the conventional J/psi production from the color-singlet mechanism at NLO when p(t) > 26 (35) GeV at the Tevatron (LHC) and reach about 6 (10) times of the conventional one when p(t) = 50 (100) GeV at the Tevatron (LHC), in spite of a suppression factor (alpha/alpha(s))(2) that is associated with the QED and QCD coupling constants. In addition, it also has large impact on the p(t) distribution of J/psi polarization in large p(t) region. Therefore, it is an important mechanism for J/psi production at large p(t) region especially for the LHC. (c) 2012 Elsevier B.V. All rights reserved.
学科领域Physics
DOI10.1016/j.physletb.2012.04.025
收录类别SCI
WOS记录号WOS:000304236500006
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223958
专题理论物理室
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He ZG,Li R,王建雄;He, ZG,et al. J/psi production via photon fragmentation at hadron colliders[J]. PHYSICS LETTERS B,2012,711(5):371-375.
APA 何志国,李荣,王建雄;He, ZG,Li, R,&Wang, JX.(2012).J/psi production via photon fragmentation at hadron colliders.PHYSICS LETTERS B,711(5),371-375.
MLA 何志国,et al."J/psi production via photon fragmentation at hadron colliders".PHYSICS LETTERS B 711.5(2012):371-375.
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