Pionic charge exchange on the proton from 40 to 250 MeV
核实验
2009-06-12 v1
摘要
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.
引用
@article{arxiv.nucl-ex/0605017,
title = {Pionic charge exchange on the proton from 40 to 250 MeV},
author = {J. Breitschopf and M. Bauer and H. Clement and M. Croeni and H. Denz and E. Friedman and E. F. Gibson and R. Meier and G. J. Wagner},
journal= {arXiv preprint arXiv:nucl-ex/0605017},
year = {2009}
}