Present status of the nonstrange and other flavor partners of the exotic Θ⁺ baryon

Given the existing empirical information about the exotic Theta(+) baryon, we analyze possible properties of its SU(3)(F)-partners, paying special attention to the nonstrange member of the antidecuplet N*. The modified pi N partial-wave analysis presents two candidate masses, 1680 MeV and 1730 MeV. In both cases, the N* should be rather narrow and highly inelastic. Our results suggest several directions for experimental studies that may clarify properties of the antidecuplet baryons, and structure of their mixing with other baryons. Recent experimental evidence from the GRAAL and STAR Collaborations could be interpreted as observations of a candidate for the Theta(+) nonstrange partner.