Strong evidence for nucleon resonances near 1900 MeV

Data on the reaction γp → KþΛ from the CLAS experiments are used to derive the leading multipoles, E0þ, M1−, E1þ, and M1þ, 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 þ 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 ¼ 1=2−, 1=2þ, and 3=2þ in the region at about 1.9 Ge