The role of the Roper resonance in n p --> d (pi pi)
L. Alvarez-Ruso
Abstract
In this work, a model for the n p --> d (pi pi) reaction is developed. It is shown that the structure of the deuteron momentum spectra for a neutron beam momentum of 1.46 GeV can be explained as a consequence of the interplay of two mechanisms involving the excitation of the N*(1440) resonance and its subsequent decay into N (pi pi)T=0S-wave and Delta pi respectively. The relevance of the present analysis for the study of the Roper excitation and decay properties, as well as for the interpretation of other two-pion production experiments is discussed.
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