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题名: Finite size vertex correction to the strong decay of eta(c) and chi(c) states and a determination of alpha(s) (m(c))
作者: Ping, RG ;  Jiang, HQ ;  Zou, BS
刊名: HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
出版日期: 2002
卷号: 26, 期号:6, 页码:563-568
关键词: HEAVY
学科分类: Physics
其他题名: ηc和χc强衰变的有限顶角修正及αs(m<sub>c</sub>)的确定
通讯作者: Ping, RG , Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
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
英文摘要: 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).
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000176245500004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13508
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Ping, RG,Jiang, HQ,Zou, BS. 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.
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