Pion decay widths of nonstrange-baryon resonances are calculated based on the ³P₀ quark-pair-creation model. The decay mechanism is consistent with the description of the nucleon and of the pion as having quark structure related to a flux-tube model motivated by QCD. The spectroscopic model has no adjustable parameter. The ³P₀ model has one parameter which we fit to reproduce the {Δ}(1232) decay width. The results for 19 resonances are compared to experiment and to results obtained from the pseudoscalar-emission model. This sheds some light on the role of the finite size of the pion.
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Stancu et al. (1988) studied this question.
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