Strong Evidence for Nucleon Resonances near 1900 MeV

Data on the reaction γp→K⁺Λ from the CLAS experiments are used to derive the leading multipoles, E₀₊, M₁₋, E₁₊, and M₁₊, from the production threshold to 2180 MeV in 24 slices of the invariant mass. The four multipoles are determined without any constraints. The multipoles are fitted using a multichannel L+P model that allows us to search for singularities and to extract the positions of poles on the complex energy plane in an almost model-independent method. The multipoles are also used as additional constraints in an energy-dependent analysis of a large body of pion and photoinduced reactions within the Bonn-Gatchina partial wave analysis. The study confirms the existence of poles due to nucleon resonances with spin parity JP=1/2⁻, 1/2⁺, and 3/2⁺ in the region at about 1.9 GeV.