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Masses and widths of light scalar mesons in chiral perturbation theory
Chen Xiao-Zhao; Li Xiao-Ya; Lue Xiao-Fu; Chen, XZ , Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China
2008
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
卷号49期号:2页码:451-455
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.
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
关键词Quark Model
学科领域Physics
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收录类别SCI
WOS记录号WOS:000253447100041
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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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