Gluon GPDs and exclusive photoproduction of quarkonium in forward region
文献类型：期刊论文
| 作者 | Cui, Z. L.; Hu, M. C.; Ma, J. P.
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| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2019 |
| 卷号 | 79期号:10页码:812 |
| ISSN号 | 1434-6044 |
| 关键词 | HADRON STRUCTURE SPIN DVCS NUCLEON |
| DOI | 10.1140/epjc/s10052-019-7298-y |
| 英文摘要 | Forward photoproduction of J/psi can be used to extract generalized parton distributions (GPDs) of gluons. We analyze the process at twist-3 level and study relevant classifications of twist-3 gluon GPDs. At leading power or twist-2 level the produced J/psi is transversely polarized. We find that at twist-3 the produced J/psi is longitudinally polarized. Our study shows that in the high-energy limit the twist-3 amplitude is only suppressed by the inverse power of the heavy quark mass relatively to the twist-2 amplitude. This indicates that the power correction to the cross-section of unpolarized J/psi can have a sizable effect. The poles in the hard factor convoluted with twist-3 gluon GPDs may concern the GPDs discontinuities, which will be briefly discussed in this work. We have also derived the amplitude of the production of h(c) at twist-3, but the result contains end-point singularities. The production of other quarkonia has been briefly discussed. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/26994]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.[Cui, Z. L. 2.Hu, M. C. 3.Ma, J. P.] Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China 4.Ma, J. P.] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 5.[Ma, J. P.] Peking Univ, Sch Phys, Beijing 100871, Peoples R China 6.[Ma, J. P.] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui, Z. L.,Hu, M. C.,Ma, J. P.. Gluon GPDs and exclusive photoproduction of quarkonium in forward region[J]. EUROPEAN PHYSICAL JOURNAL C,2019,79(10):812. |
| APA | Cui, Z. L.,Hu, M. C.,&Ma, J. P..(2019).Gluon GPDs and exclusive photoproduction of quarkonium in forward region.EUROPEAN PHYSICAL JOURNAL C,79(10),812. |
| MLA | Cui, Z. L.,et al."Gluon GPDs and exclusive photoproduction of quarkonium in forward region".EUROPEAN PHYSICAL JOURNAL C 79.10(2019):812. |
入库方式： OAI收割
来源：理论物理研究所
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