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Pionic charge exchange on the proton from 40 to 250 MeV

J. Breitschopf·M. Bauer·H. Clement·M. Croeni·H. Denz·E. Friedman·E. F. Gibson·R. Meier·G. J. Wagner
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Abstract

The total cross sections for pionic charge exchange on hydrogen were measured using a transmission technique on thin CH2 and C targets. Data were taken for pi- lab energies from 39 to 247 MeV with total errors of typically 2% over the Delta-resonance and up to 10% at the lowest energies. Deviations from the predictions of the SAID phase shift analysis in the 60 to 80 MeV region are interpreted as evidence for isospin-symmetry breaking in the s-wave amplitudes. The charge dependence of the Delta-resonance properties appears to be smaller than previously reported.

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J. Breitschopf, M. Bauer, H. Clement, M. Croeni, H. Denz, E. Friedman, E. F. Gibson, R. Meier, G. J. Wagner. 2006-05-16. Pionic charge exchange on the proton from 40 to 250 MeV. https://doi.org/10.1016/j.physletb.2006.07.009

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