ITP OpenIR  > 理论物理所1978-2010年知识产出
Reexamining radiative decays of 1(--) quarkonium into eta(
Ma, JP; Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2002
发表期刊PHYSICAL REVIEW D
ISSN0556-2821
卷号65期号:9页码:-
摘要Recently CLEO has studied the radiative decay of Y into eta(') and an upper limit for the decay has been determined. Confronted with this upper limit, most theoretical predictions for the decay fail. After briefly reviewing these predictions we reexamine the decay by separating the nonperturbative effect related to the quarkonium and that related to eta(') or eta, in which the latter is parametrized by distribution amplitudes of gluons in eta('). With this factorization approach we obtain theoretical predictions which are in agreement with experiment. Uncertainties in our predictions are discussed. The largest possible uncertainties are from the relativistic corrections for J/psi and the value of the charm quark mass. We argue that the effect of these uncertainties can be reduced by using quarkonium masses instead of using quark masses. An example of the reduction is shown with an attempt to explain the violation of the famous 14% rule in radiative decays of charmonia.
部门归属Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Qcd-analysis Annihilation States
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13526
专题理论物理所1978-2010年知识产出
通讯作者Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
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Ma, JP,Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.. Reexamining radiative decays of 1(--) quarkonium into eta([J]. PHYSICAL REVIEW D,2002,65(9):-.
APA Ma, JP,&Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2002).Reexamining radiative decays of 1(--) quarkonium into eta(.PHYSICAL REVIEW D,65(9),-.
MLA Ma, JP,et al."Reexamining radiative decays of 1(--) quarkonium into eta(".PHYSICAL REVIEW D 65.9(2002):-.
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