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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))
其他题名ηc和χc强衰变的有限顶角修正及αs(mc)的确定
Ping, RG; Jiang, HQ; Zou, BS; Ping, RG , Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
2002
发表期刊HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
ISSN0254-3052
卷号26期号:6页码:563-568
摘要In 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).
部门归属Chinese 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
关键词Heavy
学科领域Physics
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收录类别SCI
WOS记录号WOS:000176245500004
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13508
专题理论物理所SCI论文
通讯作者Ping, RG , Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
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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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