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Chen Xiao-Zhao; Li Xiao-Ya; Lue Xiao-Fu; Chen, XZ , Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China
Masses and widths of light scalar mesons in chiral perturbation theory
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
关键词Quark Model
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.
2008
ISSN0253-6102
卷号49期号:2页码:451-455
学科领域Physics
收录类别SCI
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5587
专题理论物理所科研产出_SCI论文
通讯作者Chen, XZ , Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China
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GB/T 7714
Chen Xiao-Zhao,Li Xiao-Ya,Lue Xiao-Fu,et al. Masses and widths of light scalar mesons in chiral perturbation theory[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2008,49(2):451-455.
APA Chen Xiao-Zhao,Li Xiao-Ya,Lue Xiao-Fu,&Chen, XZ , Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China.(2008).Masses and widths of light scalar mesons in chiral perturbation theory.COMMUNICATIONS IN THEORETICAL PHYSICS,49(2),451-455.
MLA Chen Xiao-Zhao,et al."Masses and widths of light scalar mesons in chiral perturbation theory".COMMUNICATIONS IN THEORETICAL PHYSICS 49.2(2008):451-455.
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