Parity of antidecuplet baryons reexamined from chiral soliton models

We recalculate masses and widths of antidecuplet baryons in the case of positive parity from chiral soliton models, provided that the member Xi(3/2) of the antidecuplet has a mass 1.86 GeV, as reported recently. Calculations show that there are no convincing candidates for the nonexotic members of the antidecuplet available in the baryon listings. Up to the leading order of m(s) and 1/N-c, the width formula for the decay of the antidecuplet baryons to the octet depends only on SU(3) symmetry model independently, except the coupling constant. Similarly, we give a width formula for the decay of negative parity baryons belonging to certain SU(3) baryon multiplets by pure symmetry consideration. By this formula, we find that if we have an antidecuplet with negative parity and that the masses are the same as those given by chiral soltion models, the identification of N(1650) as N-(10) over bar are inconsistent with experiments for N(1650)-->Npi while the widths agree with other two decay channels involving strangeness. And Sigma(1750) seems to be a reasonable candidate for Sigma((10) over bar).Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)5ARTICLE9null7