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Abstract
We use an isobar model and first-order perturbation theory to determine the width of resonances that decay into a pion and two nucleons near the NN threshold. The perturbation is given in this case by the three-body unitarity cuts. As an application we study the case of the resonance observed in pionic double-charge-exchange reactions on nuclei. We consider the possible isospin assignments of this resonance and conclude that the isospin 2 assignment is the correct one.
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Schedule a callMore From: Journal of Physics G: Nuclear and Particle Physics
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