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题名: Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?
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
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevLett.115.222001
通讯作者: Feng, F (reprint author), China Univ Min & Technol, Beijing 100083, Peoples R China.
文章类型: Article
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.
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
项目资助者: National Natural Science Foundation of China [11505285, 11447031] ;  Fundamental Research Funds for the Central Universities [SWU114003, XDJK2016C067] ;  National Natural Science Foundation of China (DGF and NSFC) [11475188, 11261130311, CRC110] ;  IHEP Innovation Grant [Y4545170Y2] ;  State Key Lab for Electronics and Particle Detectors ;  Open Project Program of State Key Laboratory of Theoretical Physics [Y4KF081CJ1]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20783
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
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.
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