Theoretical study of the NN -> NN pi pi reaction
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Álvarez Ruso, Luis; Oset Báguena, Eulogio; Hernández Gajate, Eliecer
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Aquest document és un/a article, creat/da en: 1998
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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. |
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