The role of the Roper resonance in n p --> d (pi pi)

Details The role of the Roper resonance in n p --> d (pi pi) The role of the Roper resonance in n p --> d (pi pi)

1998-11-17

arxiv.org/abs/nucl-th/9811058v1

Phys.Lett. B452 (1999) 207-213

Physics

Nuclear Physics

Nuclear Theory

13 pages, 6 ps figures

Scientific paper

10.1016/S0370-2693(99)00310-X

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=0}_{S-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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