Exotic Properties of N*(1895) and Its Impact on Photoproduction of Light Hyperons

K.P. Khemchandania, A. Martínez Torresb, Sang-Ho Kimc, Seung-il Namc, d, A. Hosakae, f aUniversidade Federal de São Paulo, C.P. 01302-907, São Paulo, Brazil bUniversidade de Sao Paulo, Instituto de Fisica, C.P. 05389-970, Sao Paulo, Brazil cDepartment of Physics, Pukyong National University (PKNU), Busan 48513, Korea dAsia Pacific Center for Theoretical Physics (APCTP), Pohang 37673, Korea eResearch Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka, 567-0047, Japan fAdvanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai 319-1195, Japan

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In this work, we outline the findings of our recent study of the properties of N*(1895) and its consequential impacts on the cross-sections of the photoproduction of Λp(1405). Further, we discuss the possibility of the existence of an isovector state with a mass similar to Λp(1405), which we refer to as Σp(1400). With the idea of motivating experimental investigations of Σp(1400), we have studied its photoproduction process and determined the respective cross-sections and polarization observables. We have studied also the coupling of N*(1895) to KΣp(1400) and found that it gives an important contribution to the cross-sections near the threshold. In the process, we have determined the branching ratios of the decay of N*(1895) to the final states involving Λp(1405) and Σp(1400) to be in the range of 6-7 MeV. Our findings can motivate the consideration of alternative processes in partial wave analyses of experimental data when studying the properties of N*(1895).

DOI:10.12693/APhysPolA.142.329 topics: properties of unstable baryons, effective Lagrangian approach