Role of spin-3/2 hyperon resonances in the kaon photoproduction γp → K +Λ

Conference on Theoretical Physics and Nonlinear Phenomena 2016

Suciawo, W.D.^1 ; Clymton, S.^1 ; Mart, T.^1

Departemen Fisika, FMIPA, Universitas Indonesia, Depok

16424, Indonesia^1

关键词: Effective Lagrangian;    Hyperon resonance;    Isobar model;    Nucleon resonance;    Photoproductions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/856/1/012011/pdf
DOI  :  10.1088/1742-6596/856/1/012011

来源: IOP

【 摘 要 】

We have studied the role of spin-3/2 hyperon resonances in the kaon photoproduction γp → K+Λ by using an isobar model within the effective Lagrangian approach. This study provides an extension to our previous study, which investigated the effect of nucleon resonances with spins up to 5/2. In the current investigation we have added 7 hyperon resonances with spin-3/2 to the model. The result indicates that the inclusion of spin-3/2 hyperon resonances have a significant effect on this model, i.e., the value of χ2can be substantially reduced. Significant improvement can be observed in the polarization observables, especially in the backward angles.