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题名: Relativistic corrections to Gamma exclusive decay into double S-wave charmonia
作者: Sang, WL;  Feng, F;  Chen, YQ
刊名: PHYSICAL REVIEW D
出版日期: 2015
卷号: 92, 期号:1, 页码:14025
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.92.014025
通讯作者: Feng, F (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: Within the framework of nonrelativisitic QCD factorization formalism, we present the next-to-leadingorder relativistic corrections to Gamma exclusive decay into eta(c) plus J/psi. The double charmonia can be produced through several immediate channels, i.e., Gamma -> g*g*g* -> eta(c) + J/psi, g*g*gamma* -> eta(c) + J/psi, and Gamma -> gamma* -> eta(c) + J/psi. The amplitudes of these three channels are obtained accurate up to O(alpha(3)(s)v(2)), O(alpha alpha(s)(2)v(2)), and O(alpha alpha(2)(s)v(2)), respectively, where v indicates the typical heavy quark velocity in bottomonium and/or charmonium rest frame. The decay rates are also presented. We find that the next-to-leading-order relativistic corrections to the short-distance coefficients as well as the decay rates are both significant and negative, especially for the corrections from bottomonium. More seriously, the decay rates are even brought into negative by including the relativistic corrections, which indicates the poor convergence for the velocity expansion in this kind of process. Detailed analysis is given in the paper.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: AMPLITUDES ;  J/PSI
收录类别: SCI
项目资助者: National Natural Science Foundation of China [11447031, 112755242] ;  Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics [Y4KF081CJ1] ;  Natural Science Foundation of ChongQing [cstc2014jcyjA00029] ;  Fundamental Research Funds for the Central Universities [SWU114003] ;  Fundamental Research Funds for the Central Universities
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20920
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Sang, WL,Feng, F,Chen, YQ. Relativistic corrections to Gamma exclusive decay into double S-wave charmonia[J]. PHYSICAL REVIEW D,2015,92(1):14025.
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