Amplitude analysis of K? N scattering

39th Symposium on Nuclear Physics 2016

Fernández-Ramírez, César^1

Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, México D.F.

04510, Mexico^1

关键词: Amplitude analysis;    Analytical properties;    Center-of-mass energies;    Coupled-channel models;    Gain insight;    Partial waves;    Resonance region;    Threshold behavior;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/730/1/012010/pdf
DOI  :  10.1088/1742-6596/730/1/012010

来源: IOP

【 摘 要 】

We present the results of a coupled-channel model for K N scattering in the resonance region. The model fulfills unitarity, has the correct analytical properties for the amplitudes and the partial waves have the right threshold behavior. The parameters of the model have been established by fitting single-energy partial waves up to J = 7/2 and up to 2.15 GeV of center-of-mass energy. The Λ∗and∗spectra has been obtained, providing a comprehensive picture of the S = -1 hyperon spectrum. We use the structure of the hyperon spectrum and Regge phenomenology to gain insight on the nature of the Λ(1405) resonances.