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题名: Effects of flavour-dependent q(q)over-bar annihilation on the mixing angle of the isoscalar octet-singlet and Schwinger
作者: Li, DM ;  Yu, H ;  Shen, QX
刊名: CHINESE PHYSICS LETTERS
出版日期: 2001
卷号: 18, 期号:2, 页码:184-186
关键词: PSEUDOSCALAR MESONS
学科分类: Physics
通讯作者: Li, DM , 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
英文摘要: By incorporating the flavour-dependent quark-antiquark annihilation amplitude into the mass-squared matrix describing the mixing of the isoscalar states of a meson nonet, the new version of Schwinger's nonet mass formula, which holds with a high accuracy for the 0(-+), 1(--), 2(++), 2(-+) and 3(--) nonets, is derived and the mixing angle of the isoscalar octet-singlet for these nonets is obtained. In particular, the mixing angle of the isoscalar octet-singlet for the pseudoscalar nonet is determined to take the value of -12.92 degrees, which is in agreement with the value range from -13 degrees to -17 degrees deduced from a rather exhaustive and up-to-date analysis of data. It is also pointed out that the omission of the flavour-dependent q (q) over bar annihilation effect might be a factor resulting in the invalidity of Schwinger's original nonet mass formula for the pseudoscalar nonet.
收录类别: SCI
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12817
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:
Li, DM,Yu, H,Shen, QX. Effects of flavour-dependent q(q)over-bar annihilation on the mixing angle of the isoscalar octet-singlet and Schwinger[J]. CHINESE PHYSICS LETTERS,2001,18(2):184-186.
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