Theoretical study of the N N --> N N pi pi reaction
Abstract
We have developed a model for the N N --> N N pi pi reaction and evaluated cross sections for the different charged channels. The low energy part of those channels where the pions can be in an isospin zero state is dominated by N* excitation, driven by an isoscalar source recently found experimentally, followed by the decay N* --> N (pi pi, T=0, s-wave). At higher energies, and in channels where the pions are not in T=0, Delta excitation mechanisms become relevant. A rough agreement with the experimental data is obtained in most channels. Repercussions of the present findings for the ABC effect and the p p --> p p pi0 reaction close to threshold are also suggested.
Keywords
Cite
@article{arxiv.nucl-th/9706046,
title = {Theoretical study of the N N --> N N pi pi reaction},
author = {L. Alvarez-Ruso and E. Oset and E. Hernandez},
journal= {arXiv preprint arXiv:nucl-th/9706046},
year = {2009}
}
Comments
22 pages, 12 postscripts figures, revised: a more general N* N pi pi Lagrangian is considered, to be published in Nucl. Phys. A