Evidence for a missing nucleon resonance in kaon photoproduction
Evidence for a missing nucleon resonance in kaon photoproduction
New SAPHIR $p(\ensuremath{\gamma}{,K}^{+})\ensuremath{\Lambda}$ total cross section data show a resonance structure at a total c.m. energy around 1900 MeV. We investigate this feature with an isobar model and find that the structure can be well explained by including a new ${D}_{13}$ resonance at 1895 MeV. Such a state has been …