Theoretical study of the NN → NNππ reaction

✍ Scribed by L. Alvarez-Ruso; E. Oset; E. Hernández

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 1023 KB
• Volume: 633
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(98)00126-2

✦ Synopsis

We have developed a model for the NN --~ NNTrcr 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* r---0 N(~r~r)s.wav e. At higher energies, and in channels where the pions are not in T = 0, A 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 pp --~ pp~O reaction close to threshold are also suggested.