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题名: Masses and widths of light scalar mesons in chiral perturbation theory
作者: Chen Xiao-Zhao ;  Li Xiao-Ya ;  Lue Xiao-Fu
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2008
卷号: 49, 期号:2, 页码:451-455
关键词: QUARK ;  MODEL
学科分类: Physics
通讯作者: Chen, XZ , Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China
部门归属: [Chen, XZ; Li, XY; Lue, XF] Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China; [Lue, XF] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; [Lue, XF] China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China
英文摘要: Based on the diquark model, we assume that the light scalar mesons are q(2)q-(2), states rather than q (q) over bar. The chiral effective Lagrangian for the light scalar meson is constructed, and the mass relations are obtained: the isotriplet (a(0)) and the isosinglet (f(0)) are the heaviest and are degenerate, the isodoublets (kappa) are heavier and the other isosinglet (sigma) is the lightest; and 2M(kappa)(2) = M-a0(2) + M-sigma(2). Using experimental value for a(0) and sigma mass, we obtain M-kappa = 794 MeV, which is consistent with the experimental value. Then taking Gamma(a(0)(0) -> eta mu(0)) = 90 MeV and Gamma(f(0) -> pi(0)pi(0)) = 20 MeV, we get the width of a is: Gamma(a -> pi(+)pi(-)) = 150 MeV.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000253447100041
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5587
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:
Chen Xiao-Zhao,Li Xiao-Ya,Lue Xiao-Fu. Masses and widths of light scalar mesons in chiral perturbation theory[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2008,49(2):451-455.
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