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 |
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 |
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. |
学科主题 | Astronomy & Astrophysics; Physics |
类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
研究领域[WOS] | Astronomy & Astrophysics ; Physics |
原文出处 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000270384900053 |
内容类型 | 期刊论文 |
源URL | [http://ir.ihep.ac.cn/handle/311005/240666] |
专题 | 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 |
推荐引用方式 GB/T 7714 | 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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