Study of the p p ---> p p pi+ pi- reaction in the low-energy tail of the Roper resonance - INSPIRE

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Study of the p p ---> p p pi+ pi- reaction in the low-energy tail of the Roper resonance

Jan, 2003

5 pages

Published in:

Phys.Rev.C 67 (2003) 052202

e-Print:

nucl-ex/0301019 [nucl-ex]

DOI:

10.1103/PhysRevC.67.052202

Experiments:

CELSIUS-WASA

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Abstract:

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.

14.20.Gk
25.40.Ve
13.75.-n
p p: inelastic scattering
pi: pair production
N(1440): hadroproduction
channel cross section: energy dependence
p: angular distribution
mass spectrum
angular distribution: two-pion

References(13)

Figures(0)

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