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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(
Source PublicationPHYSICAL REVIEW D
KeywordQcd-analysis Annihilation States
AbstractRecently 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.
2002
ISSN0556-2821
Volume65Issue:9Pages:-
Subject AreaPhysics
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13526
Collection理论物理所科研产出_SCI论文
Corresponding AuthorMa, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
Recommended Citation
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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