Strong decays of baryons and missing resonances

R Bijker, J Ferretti, G Galatà, H García-Tecocoatzi… - Physical Review D, 2016 - APS
We provide results for the open-flavor strong decays of strange and nonstrange baryons into
a baryon-vector/pseudoscalar meson pair. The decay amplitudes are computed in the P 3 0
pair-creation model, where ss¯ pair-creation suppression is included for the first time in the
baryon sector, in combination with the U (7) and hypercentral models. The effects of this ss¯
suppression mechanism cannot be reabsorbed in a redefinition of the model parameters or
in a different choice of the P 3 0 model vertex factor. Our results for the decay amplitudes are …
We provide results for the open-flavor strong decays of strange and nonstrange baryons into a baryon-vector/pseudoscalar meson pair. The decay amplitudes are computed in the pair-creation model, where pair-creation suppression is included for the first time in the baryon sector, in combination with the and hypercentral models. The effects of this suppression mechanism cannot be reabsorbed in a redefinition of the model parameters or in a different choice of the model vertex factor. Our results for the decay amplitudes are compared with the existing experimental data and previous and elementary meson emission model calculations. In this respect, we show that distinct quark models differ in the number of missing resonances they predict and also in the quantum numbers of states. Therefore, future experimental results will be important in order to disentangle different models of baryon structure. Finally, in the appendixes, we provide some details of our calculations, including the derivation of all relevant flavor couplings with strangeness suppression. This derivation may be helpful to calculate the open-flavor decay amplitudes starting from other models of baryons.
American Physical Society
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