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Electromagnetic Properties of S11 States in a Light Cone Quark Model
He J(何军); Dong YB(董宇兵)
2006
发表期刊理论物理通讯(英文版)
期号10页码:269-274
通讯作者何军
摘要Using relativistic spin-flavor wave functions of a Lorentz-covariant light cone quark model, we calculate the electromagnetic form factors of two S11 resonances, N(1535) and N(1650), and the helicity amplitudes A1/2 and S1/2 for electroexcitation of the S11 resonances from the nucleon. The electromagnetic form factors of these S11 resonances are found to be similar to those of the nucleon in shape, while the charge form factor of neutral N(1650) is nearly zero. The relative peak height of the S11 charge form factors is controlled by the mixing angle common to both resonance wave functions. As in most quark models, there is a systematic overestimate of A1/2P in both N(1535) and N(1650) eases at the photon point. A sizeable S1/2 for all cases is produced as suggested by experiments.
关键词electromagntic properties S11 states light cone quark model
收录类别CNKI
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/216097
专题理论物理室
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GB/T 7714
He J,Dong YB. Electromagnetic Properties of S11 States in a Light Cone Quark Model[J]. 理论物理通讯(英文版),2006(10):269-274.
APA 何军,&董宇兵.(2006).Electromagnetic Properties of S11 States in a Light Cone Quark Model.理论物理通讯(英文版)(10),269-274.
MLA 何军,et al."Electromagnetic Properties of S11 States in a Light Cone Quark Model".理论物理通讯(英文版) .10(2006):269-274.
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