Study of the p p -> p p pi+ pi- Reaction in the Low-Energy Tail of the Roper Resonance

Details Study of the p p -> p p pi+ pi- Reaction in the Low-Energy Tail of the Roper Resonance Study of the p p -> p p pi+ pi- Reaction in the Low-Energy Tail of the Roper Resonance

2003-01-31

arxiv.org/abs/nucl-ex/0301019v3

Phys.Rev. C67 (2003) 052202

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

10.1103/PhysRevC.67.052202

Exclusive measurements of the p p -> p p pi+ pi- 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* -> N sigma and N* -> Delta pi -> N sigma their energy-dependent relative branching ratio is determined.

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