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 | |
刊名 | COMMUNICATIONS IN THEORETICAL PHYSICS |
2008 | |
卷号 | 49期号:2页码:451-455 |
关键词 | Quark Model |
ISSN号 | 0253-6102 |
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. |
学科主题 | Physics |
URL标识 | 查看原文 |
WOS记录号 | WOS:000253447100041 |
公开日期 | 2012-08-02 |
内容类型 | 期刊论文 |
源URL | [http://ir.itp.ac.cn/handle/311006/5587] |
专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
通讯作者 | Chen, XZ , Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China |
推荐引用方式 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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