Masses and widths of light scalar mesons in chiral perturbation theory

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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
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.