Decay Properties of the Roper Resonance from p p -> p p pi+ pi-

Details Decay Properties of the Roper Resonance from p p -> p p pi+ pi- Decay Properties of the Roper Resonance from p p -> p p pi+ pi-

2002-10-02

arxiv.org/abs/nucl-ex/0210006v1

Physics

Nuclear Physics

Nuclear Experiment

QNP 2002

Scientific paper

Exclusive measurements of the two-pion production channel p p -> p p pi+ pi- have been carried out near threshold at CELSIUS with the PROMICE/WASA detector. They reveal p p -> p p*(1440) -> p p sigma -> p p (pi+ pi-)I=l=0 as the dominant process at these energies, however, the data exhibit also significant contributions from p*(1440) -> Delta pi -> p (pi+ pi-)I=l=0 . From the observed interference of this routes their relative branching ratio is derived.

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