Where are the missing members of the baryon antidecuplet?

Abstract

We analyze the consequences of the observation of exotic pentaquark baryons on the location of the nonexotic baryons belonging to the antidecuplet. We suggest that there must be a new nucleon state at 1650--1690 MeV and a new $\ensuremath{\Sigma}$ baryon at 1760--1810 MeV.