Hard-scattering approach to strongly hindered magnetic-dipole transitions in quarkonium
文献类型：期刊论文
| 作者 | Jia Y(贾宇) ; Xu J(许甲); Zhang J(张娟); Jia, Y; Xu, J; Zhang, JA
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2010 |
| 卷号 | 82期号:1页码:14008 |
| 通讯作者 | [Jia, Yu ; Xu, Jia ; Zhang, Juan] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Jia, Yu] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China ; [Zhang, Juan] Shanxi Univ, Inst Theoret Phys, Taiyuan 030006, Shanxi, Peoples R China |
| 英文摘要 | For a class of hindered magnetic-dipole (M1) transition processes, such as Gamma(3S) -> eta(b) + gamma (the discovery channel of the eta(b) meson), the emitted photon is rather energetic so that the traditional approaches based on multipole expansion may be invalidated. We propose that a "hard-scattering'' picture, somewhat analogous to the pion electromagnetic form factor at large momentum transfer, may be more plausible to describe such types of transition processes. We work out a simple factorization formula at lowest order in the strong coupling constant, which involves convolution of the Schrodinger wave functions of quarkonia with a perturbatively calculable part induced by exchange of one semihard gluon between quark and antiquark. This formula, without any freely adjustable parameters, is found to agree with the measured rate of Gamma(3S) -> eta(b) + gamma rather well, and can also reasonably account for other recently measured hindered M1 transition rates. The branching fractions of Gamma(4S) -> eta((i))(b) + gamma are also predicted. |
| 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:000280067500002 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240421]  |
| 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 | Jia Y,Xu J,Zhang J,et al. Hard-scattering approach to strongly hindered magnetic-dipole transitions in quarkonium[J]. PHYSICAL REVIEW D,2010,82(1):14008. |
| APA | 贾宇,许甲,张娟,Jia, Y,Xu, J,&Zhang, JA.(2010).Hard-scattering approach to strongly hindered magnetic-dipole transitions in quarkonium.PHYSICAL REVIEW D,82(1),14008. |
| MLA | 贾宇,et al."Hard-scattering approach to strongly hindered magnetic-dipole transitions in quarkonium".PHYSICAL REVIEW D 82.1(2010):14008. |
入库方式： OAI收割
来源：高能物理研究所
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