S波Kπ散射以及动力学产生标量介子(英文)  

S Wave Kπ Scattering and Dynamically Generated Scalar Resonances

作　　者：郭奉坤[1] 平荣刚[1] 沈彭年[1] 姜焕清[2] 邹冰松 

机构地区：[1]中国高等科技中心,北京100080 [2]中国科学院高能物理研究所

出　　处：《高能物理与核物理》2006年第11期1062-1066,共5页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(90103020,10475089,10435080,10447130);中国科学院知识创新工程重大项目(KJCX2-SW-N02)资助~~

摘　　要：考虑Kπ和Kη两个耦合道,用手征幺正方法研究了S波Kπ散射．结果表明,只用一个参数,1．2GeV以下的散射相移数据就可以得到很好的描述,并且散射长度也和实验值符合很好．此方法可以动力学产生标量介子κ,并预言其质量和宽度分别大约是752MeV和594MeV．可以定性地产生对应于K*0(1430)的标量介子．Based on a chiral unitary approach （ChUA）, S wave Kπ scattering is studied. We consider Kπ and Kη coupled channels on isospin bases. With only one parameter, the S wave Kπ scattering phase shift data below 1.2GeV can be described, and the resultant S wave scattering lengths also coincide with the experimental values well. In this approach, a scalar resonance corresponding to the κ can be generated dynamically. Its mass and width are about 725MeV and 594MeV, respectively. A resonance corresponding to the scalar K0^＊（1430）can also be generated qualitatively.

关 键 词：S波Kπ散射 手征幺正方法 κ 

分 类 号：O571[理学—粒子物理与原子核物理]