Next-to-leading-order QCD corrections to e(+)e(-) -> J/psi c(c)over-bar at the B factories
Gong B(龚斌); Wang JX(王建雄); Gong, G; Wang, JX
刊名PHYSICAL REVIEW D
2009
卷号80期号:5页码:54015
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.80.054015
通讯作者[Gong, Bin] CAS, Inst High Energy Phys, Beijing 100049, Peoples R China ; CAS, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
文章类型Article
英文摘要We calculate the next-to-leading-order (NLO) QCD correction to e(+)e(-) -> J/psi c (c) over bar at the B factories, and present theoretical predictions on the momentum and production angular distribution for J/psi production, and momentum distribution for J/psi polarization at NLO for the first time. By applying Brodsky, Lepage, and Mackenzie scale setting for the renormalization scale, it is found that the QCD perturbative expansion is significantly improved with the unique scale choice mu* = 1.65 GeV. Together with the psi' feed-down contribution, the total cross section and momentum distribution can account for the recent experimental measurement by the Belle collaboration. The total cross section and momentum distribution are also found to be consistent with the experimental measurement in the previous study on e(+)e(-) -> J/psi gg. However, the production angular distribution of J/psi production for either the J/psi c (c) over bar or the J/psi gg channel has a quite different shape in contrast with the new experimental data, although it fits with the experimental data when the two channels are added together. This situation is difficult to explain. To clarify the puzzle of J/psi polarization, further experimental measurements are strongly expected to testify our predictions on the momentum distribution for J/psi polarization. Our total cross section agrees with that given in the previous study of Zhang and Chao by using their renormalization scheme and input parameters.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]Astronomy & Astrophysics ; Physics
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语种英语
WOS记录号WOS:000270384900053
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240666
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_理论物理室
作者单位中国科学院高能物理研究所
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Gong B,Wang JX,Gong, G,et al. Next-to-leading-order QCD corrections to e(+)e(-) -> J/psi c(c)over-bar at the B factories[J]. PHYSICAL REVIEW D,2009,80(5):54015.
APA 龚斌,王建雄,Gong, G,&Wang, JX.(2009).Next-to-leading-order QCD corrections to e(+)e(-) -> J/psi c(c)over-bar at the B factories.PHYSICAL REVIEW D,80(5),54015.
MLA 龚斌,et al."Next-to-leading-order QCD corrections to e(+)e(-) -> J/psi c(c)over-bar at the B factories".PHYSICAL REVIEW D 80.5(2009):54015.
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