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Ping, RG; Jiang, HQ; Zou, BS; Ping, RG , Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
Finite size vertex correction to the strong decay of eta(c) and chi(c) states and a determination of alpha(s) (m(c))
Source PublicationHIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
KeywordHeavy
AbstractIn previous calculations of the strong decay of a charmonium, the first-order momentum dependence of the quark propagator is kept. It was found that the finite-size vertex correction to the Gamma(J/phi-->3g) process is large. In this paper we calculate the two-gluon decay widths of eta(c),chi(c0) and X-c2 by including the full momentum dependence of the quark propagator. Comparing to the zero-order calculation we find that the finite-size vertex correction factor to the two-gluon decay widths of is 1.32, and for the two-gluon decays of X-c0 and X-c2, the vertex correction factors are 1.45 and 1.26, respectively. With the corrected decay widths Gamma(eta(c)-->2g) we extract the value as alpha(s)(m(c).) = 0.28 +/- 0.05 which agrees with that calculated from the Gamma(J/phi-->3g) process with the same correction. The finite-size vertex correction to the process Gamma(eta(c)-->3g) is not as large as that to the process Gamma(J/phi-->3g).
2002
ISSN0254-3052
Volume26Issue:6Pages:563-568
Subject AreaPhysics
Indexed BySCI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13508
Collection理论物理所科研产出_SCI论文
Corresponding AuthorPing, RG , Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
Recommended Citation
GB/T 7714
Ping, RG,Jiang, HQ,Zou, BS,et al. Finite size vertex correction to the strong decay of eta(c) and chi(c) states and a determination of alpha(s) (m(c))[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2002,26(6):563-568.
APA Ping, RG,Jiang, HQ,Zou, BS,&Ping, RG , Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China..(2002).Finite size vertex correction to the strong decay of eta(c) and chi(c) states and a determination of alpha(s) (m(c)).HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,26(6),563-568.
MLA Ping, RG,et al."Finite size vertex correction to the strong decay of eta(c) and chi(c) states and a determination of alpha(s) (m(c))".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 26.6(2002):563-568.
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