四夸克成分对奇异夸克偶素能谱的影响  

The Effect of Four-Quark Components on the s Spectrum

作　　者：宋亚蒙[1] 邹静[1] 胡志辉[1] 平加伦[1] 

机构地区：[1]南京师范大学物理科学与技术学院,江苏南京210023

出　　处：《南京师大学报（自然科学版）》2013年第3期31-36,47,共7页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金(11175088)

摘　　要：本文利用3P0模型,计算了四夸克成分对s系统能谱的影响,并重新调整参数以符合实验数据.计算结果表明四夸克成分对s能谱有较大的影响,对于激发态,其效应难以被模型参数吸收,计算结果也表明四夸克成分不大于15%,因此更多夸克的成分可以忽略.The effect of four-quark component on the ss spectrum is studied in the framework of 3Po model. The parameters of the chiral quark model are re-adjusted to fit the experimental data. The results show that the effect of four- quark component is rather large, and the effect cannot be absorbed by model parameters even for low-lying states. Our calculations also show that the percentage of four-quark components in the ss states is smaller than 15%, so the higher Foek components can be ignored.

关 键 词：奇异夸克偶素 耦合道效应 3P0模型 组份夸克模型 

分 类 号：O572.33[理学—粒子物理与原子核物理]