Chiral Symmetry and N*(1440) -> N pi pi Decay
Abstract
The N*(1440) -> N pi pi decay is studied by making use of the chiral reduction formula. This formula suggests a scalar-isoscalar pion-baryon contact interaction which is absent in the recent study of Hern\'andez et al. The contact interaction is introduced into their model, and is found to be necessary for the simultaneous description of gRN pi pi and the pi-pi and pi-N invariant mass distributions.
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