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Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?
Feng, F; Jia Y(贾宇); Jia, Y; Sang, WL
2015
发表期刊PHYSICAL REVIEW LETTERS
卷号115页码:222001
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.
文章类型Article
学科领域Physics
DOI10.1103/PhysRevLett.115.222001
收录类别SCI ; EI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000365525400008
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228848
专题理论物理室
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GB/T 7714
Feng, F,Jia Y,Jia, Y,et al. Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?[J]. PHYSICAL REVIEW LETTERS,2015,115:222001.
APA Feng, F,贾宇,Jia, Y,&Sang, WL.(2015).Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?.PHYSICAL REVIEW LETTERS,115,222001.
MLA Feng, F,et al."Can Nonrelativistic QCD Explain the gamma gamma* -> eta(c) Transition Form Factor Data?".PHYSICAL REVIEW LETTERS 115(2015):222001.
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