Photoproduction of the Θ~+ and its vector and azial-vector structure

摘要：

We present recent investigations on the vector and axial-vector transitions of the baryon antide-cuplet within the framework of the self-consistent SU(3) chiral quark-soliton model, taking into account the 1/N_c rotational and linear ms corrections. The main contribution to the electric-like transition form factor comes from the wave-function corrections. This is a consequence of the generalized Ademollo-Gatto theorem. It is also found that in general the leading-order contributions are almost canceled by the rotational 1/N_c corrections. The results are summarized as follows: the vector and tensor K*NΘ coupling constants, g_(K*NΘ)=0.74-0.87 and f_(K*NΘ)=0.53-1.16, respectively, and F_(Θ→KN)=0.71 MeV, based on the result of the KNΘ coupling constant g_(KnΘ)=0.83. We also show the differential cross sections and beam asymmetries, based on the present results. We also discuss the connection of present results with the original work by Diakonov, Petrov, and Polyakov.

关键词： Baryon antidecuplet vector and azial-vector transition form factors chiral quark-soliton model Photoproduction of the Θ~+

作者: H.-Ch.Kim K.Goeke T.Ledwig S.i.Nam

作者单位: Department of Physics,Inha University,Incheon 402-751,Republic of Korea Institut fur Theoretische Physik Ⅱ,Ruhr-Universitat Bochum,D-44780 Bochum,Germany Institut fur Kernphysik,Universitat Mainz,D-55099 Mainz,Germany Department of Physics,Chung-Yuan Christian University (CYCU),Chung-Li 32023,China

会议类型: 国际会议

会议名称: The 12th International Workshop on the Physics of Ezcited Nucleon NSTAR2009(2009激发态核子物理研讨会)

会议地点: 北京

会议语种:英文

页码: 1279-1284

在线出版日期: 2009-04-19（万方平台首次上网日期，不代表论文的发表时间）