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	Reexamining radiative decays of 1(--) quarkonium into eta(
	Ma, JP; Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
刊名	PHYSICAL REVIEW D
	2002
卷号	65期号:9页码:-
关键词	Qcd-analysis Annihilation States
ISSN号	0556-2821
英文摘要	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.
学科主题	Physics
URL标识	查看原文
公开日期	2012-08-29
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13526]
专题	理论物理研究所_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.
推荐引用方式 GB/T 7714	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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