Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?
文献类型：期刊论文
| 作者 | Feng, F; Jia, Y; Sang, WL |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2015 |
| 卷号 | 115期号:22页码:222001 |
| 通讯作者 | Feng, F (reprint author), China Univ Min & Technol, Beijing 100083, Peoples R China. |
| 英文摘要 | Unlike the bewildering situation in the gamma gamma* -> pi form factor, a widespread view is that perturbative QCDcan decently account for the recentBABAR measurement of the gamma gamma* ->eta(c) transition formfactor. The nextto- next-to-leading-order perturbative correction to the gamma gamma* ->eta(c,b) form factor, is investigated in the nonrelativistic QCD (NRQCD) factorization framework for the first time. As a byproduct, we obtain, by far, the most precise order-alpha(2)(s) NRQCD matching coefficient for the eta(c,b) -> gamma gamma process. After including the substantial negative order-alpha(2)(s) correction, the good agreement between NRQCD prediction and the measured gamma gamma* ->eta(c) form factor is completely ruined over a wide range of momentum transfer squared. This eminent discrepancy casts some doubts on the applicability of the NRQCD approach to hard exclusive reactions involving charmonium. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 关键词[WOS] | B-C-MESON ; E(+)E(-) ANNIHILATION ; MATHEMATICA PACKAGE ; LEPTONIC DECAYS ; ROOT-S=10.6 GEV ; QUARK ; COEFFICIENTS ; AMPLITUDES ; INTEGRALS |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/20783]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Feng, F,Jia, Y,Sang, WL. Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?[J]. PHYSICAL REVIEW LETTERS,2015,115(22):222001. |
| APA | Feng, F,Jia, Y,&Sang, WL.(2015).Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?.PHYSICAL REVIEW LETTERS,115(22),222001. |
| MLA | Feng, F,et al."Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?".PHYSICAL REVIEW LETTERS 115.22(2015):222001. |
入库方式： OAI收割
来源：理论物理研究所
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