The pp→ppπ+π- reaction studied in the low-energy tail of the Roper resonance
Abstract
Exclusive measurements of the pp→ppπ+π- reaction have been carried out at Tp=775 MeV at CELSIUS using the PROMICE/WASA setup. Together with data obtained at lower energy, they point to a dominance of the Roper excitation in this process. From the observed interference of its decay routes N*→Nσ and N*→Δπ→Nσ, their energy-dependent relative branching ratio is determined.
- Publication:
-
Physical Review C
- Pub Date:
- May 2003
- DOI:
- 10.1103/PhysRevC.67.052202
- arXiv:
- arXiv:nucl-ex/0301019
- Bibcode:
- 2003PhRvC..67e2202P
- Keywords:
-
- 13.75.-n;
- 14.20.Gk;
- 25.40.Ve;
- Hadron-induced low- and intermediate-energy reactions and scattering;
- Baryon resonances with S=0;
- Other reactions above meson production thresholds;
- Nuclear Experiment
- E-Print:
- Phys.Rev. C67 (2003) 052202