TY - JOUR
T1 - Pionic charge exchange on the proton from 40 to 250 MeV
AU - Breitschopf, J.
AU - Bauer, M.
AU - Clement, H.
AU - Cröni, M.
AU - Denz, H.
AU - Friedman, E.
AU - Gibson, E. F.
AU - Meier, R.
AU - Wagner, G. J.
PY - 2006/8/17
Y1 - 2006/8/17
N2 - 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 π- lab energies from 39 to 247 MeV with total errors of typically 2% over the Δ-resonance and up to 10% at the lowest energies. Deviations from the predictions of the SAID phase shift analysis in the 60-80 MeV region are interpreted as evidence for isospin-symmetry breaking in the s-wave amplitudes. The charge dependence of the Δ-resonance properties appears to be smaller than previously reported.
AB - 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 π- lab energies from 39 to 247 MeV with total errors of typically 2% over the Δ-resonance and up to 10% at the lowest energies. Deviations from the predictions of the SAID phase shift analysis in the 60-80 MeV region are interpreted as evidence for isospin-symmetry breaking in the s-wave amplitudes. The charge dependence of the Δ-resonance properties appears to be smaller than previously reported.
KW - Breit-Wigner parameters of the Δ-resonance
KW - Isospin-symmetry breaking
KW - Pion-proton charge exchange
KW - Total cross sections
UR - http://www.scopus.com/inward/record.url?scp=33746347986&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2006.07.009
DO - 10.1016/j.physletb.2006.07.009
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AN - SCOPUS:33746347986
SN - 0370-2693
VL - 639
SP - 424
EP - 428
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 5
ER -