Exclusive Measurement of the pp → nnπ⁺π⁺ Reaction at 1.1 GeV

2010/12/07 by Bashkanov, M., Bogoslawsky, D., Calen, H. +36
#FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.1012.1463

Abstract

First exclusive data for the pp → nnπ⁺π⁺ reaction have been obtained at CELSIUS with the WASA detector setup at a beam energy of T_p = 1.1 GeV. Total and differential cross sections disagree with theoretical calculations, which predict the ΔΔ excitation to be the dominant process at this beam energy. Instead the data require the excitation of a higher-lying Δ state, most likely the Δ(1600), to be the leading process.

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