Projectile $Δ$ and target-Roper excitation in the p (d, d')X reaction

Details Projectile $Δ$ and target-Roper excitation in the p (d, d')X reaction Projectile $Δ$ and target-Roper excitation in the p (d, d')X reaction

2000-01-04

arxiv.org/abs/nucl-th/0001004v1

Phys.Rev. C61 (2000) 044605

Physics

Nuclear Physics

Nuclear Theory

8 ps figures

Scientific paper

10.1103/PhysRevC.61.044605

In this paper we compare a model that contains the mechanisms of $\Delta$ excitation in the projectile and Roper excitation in the target with experimental data from two (d, d') experiments on a proton target. The agreement of the theory with the experiment is fair for the data taken at T_d = 2.3 GeV. The $\Delta$ excitation in the projectile is predicted close to the observed energy with the correct width. The theory, however, underpredicts by about 40% the cross sections measured at T_d = 1.6 GeV at angles where the cross section has fallen by about two orders of magnitude. The analysis done here allows to extract an approximate strength for the excitation of the Roper [N^*(1440)] excitation and a qualitative agreement with the theoretical predictions is also found.

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