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Finite size vertex correction to the strong decay of eta(c) and chi(c) states and a determination of alpha(s) (m(c))
Ping RG(平荣刚); Jiang HQ(姜焕清); Zou BS(邹冰松); Ping, RG; Jiang, HQ; Zou, BS
2002
Source PublicationHIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
Volume26Issue:6Pages:563-568
Corresponding AuthorChinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China ; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China ; Chinese Natl Lab Heavy Ion Accelarator, Ctr Nucl Theory, Lanzhou 730000, Peoples R China
SubtypeArticle
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).
Keywordquarkonium finite vertex correction strong coupling constant
Subject AreaPhysics
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Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Nuclear ; Physics, Particles & Fields
WOS IDWOS:000176245500004
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/237969
Collection理论物理室
实验物理中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
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 平荣刚,姜焕清,邹冰松,Ping, RG,Jiang, HQ,&Zou, BS.(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 平荣刚,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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