Pionic charge exchange on the proton from 40 to 250 MeV

J. Breitschopf; M. Bauer; H. Clement; M. Cröni; H. Denz; E. Friedman; E. F. Gibson; R. Meier; G. J. Wagner

doi:10.1016/j.physletb.2006.07.009

Pionic charge exchange on the proton from 40 to 250 MeV

J. Breitschopf
, M. Bauer
, H. Clement
, M. Cröni
, H. Denz
, E. Friedman
, E. F. Gibson
, R. Meier
, G. J. Wagner^*

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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 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.

Original language	English
Pages (from-to)	424-428
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	639
Issue number	5
DOIs	https://doi.org/10.1016/j.physletb.2006.07.009
State	Published - 17 Aug 2006

Keywords

Breit-Wigner parameters of the Δ-resonance
Isospin-symmetry breaking
Pion-proton charge exchange
Total cross sections

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10.1016/j.physletb.2006.07.009

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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 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.",

keywords = "Breit-Wigner parameters of the Δ-resonance, Isospin-symmetry breaking, Pion-proton charge exchange, Total cross sections",

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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

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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

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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 -

Pionic charge exchange on the proton from 40 to 250 MeV

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Keywords

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