Decays of12−baryons in chiral effective theory

We construct an $\mathrm{SU}{\mathrm{}\left(3\right)\mathrm{}}_L\times \mathrm{SU}{\mathrm{}\left(3\right)\mathrm{}}_R$ symmetric chiral effective model which includes parity pair baryon fields. It is assumed that the positive and negative parity baryons in the parity pair have opposite chiral transformation properties than each other. Using this model, strong decays of the negative parity baryons are studied up to the order of one-loop corrections. The results agree qualitatively with experiment in the π and $K$ channels. We examine how the model parameters are determined from the decay widths and study their physical meaning. The possibilities to build other models and relations to the correlation function analysis are discussed.