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Inclusive J/psi production in Gamma decay via color-singlet mechanism
He ZG(何志国); Wang JX(王建雄); He, ZG; Wang, JX
2010
发表期刊PHYSICAL REVIEW D
卷号81期号:5页码:54030
通讯作者[He, Zhi-Guo ; Wang, Jian-Xiong] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [He, Zhi-Guo ; Wang, Jian-Xiong] CAS, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China ; [He, Zhi-Guo] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Catalonia, Spain ; [He, Zhi-Guo] Univ Barcelona, Inst Ciencies Cosmos, E-08028 Barcelona, Catalonia, Spain
摘要In this work, we have calculated the tree level color-singlet contribution to the inclusive J / psi production in Gamma decay of the alpha(5)(s) order QCD process Gamma -> J / psi + c (c) over barg and alpha(2)alpha(2)(s) order QED processes Gamma -> gamma* -> J / psi + (c) over bar and Gamma -> J / psi + gg. It is found that the contribution of the QED processes is comparable with that of the QCD process and the numerical results of the QCD process alone are about an order of magnitude smaller than the previous theoretical predictions. Our prediction in total is 4.2 x 10(-5) which is about an order of magnitude smaller than the recent CLEO measurement on the branching fraction B(Gamma -> J / psi + X). It indicates that the J / psi production mechanism in Gamma decay is not well understood and further theoretical work and experimental analysis are still necessary.
文章类型Article
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.81.054030
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语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000276194200061
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被引频次:6[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/311005/240672
专题理论物理室
作者单位中国科学院高能物理研究所
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GB/T 7714
He ZG,Wang JX,He, ZG,et al. Inclusive J/psi production in Gamma decay via color-singlet mechanism[J]. PHYSICAL REVIEW D,2010,81(5):54030.
APA 何志国,王建雄,He, ZG,&Wang, JX.(2010).Inclusive J/psi production in Gamma decay via color-singlet mechanism.PHYSICAL REVIEW D,81(5),54030.
MLA 何志国,et al."Inclusive J/psi production in Gamma decay via color-singlet mechanism".PHYSICAL REVIEW D 81.5(2010):54030.
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