夸克模型中的D_(sj)~*(2317),D_(sj)(2460)衰变(英文)  

Decays of D_(sj)~*(2317) and D_(sj)(2460) Mesons in the Quark Model

作　　者：王丰林[1] 陈晓林[1] 卢大海[1] 朱世琳[1] 邓卫真[1] 

机构地区：[1]北京大学物理学院,北京100871

出　　处：《高能物理与核物理》2006年第11期1041-1047,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10375003,10421503);教育部重大研究计划(305001)资助~~

摘　　要：用夸克模型结合Ds,D*s,讨论窄共振态D*sj(2317),Dsj(2460)．除η-π0混合角由D*s衰变宽度给出,所有的参数均取自Godfrey和Isgur的夸克模型．得到的电磁衰变宽度与实验数据和其他作者的结果相一致．但是,与现有的实验结果比较,D*sj(2317),Dsj(2460)的π介子衰变宽度要小一个数量级．我们怀疑简单的手征夸克-π轴矢相互作用的哈密顿量不适合于D*sj(2317),Dsj(2460)的强衰变。We study the decay widths of the narrow resonances Dsj^＊ （2317） and Dsj （2460） in the chiral quark model, together with the well-known D^＊ and Ds^＊ mesons. All the parameters in our calculation are taken from Godfrey and Isgur＇s quark model except the π^0-η mixing angle which is fixed by the Ds^＊ decay widths.The calculated electromagnetic decay widths agree with those from other groups and the experimental data available quite well. However, the pionic decay widths of Dsj（2317） and Dsj（2460） are too small to fit the experimental data. We suspect that the simple chiral quark pion axial-vector interaction Hamiltonian is not suitable for hadron strong decays of Dsj（2317） and Dsj（2460）.

关 键 词：夸克模型 窄共振态 衰变宽度 

分 类 号：O572.33[理学—粒子物理与原子核物理]