Electroproduction of πo mesons in the region of the first pion-nucleon resonance

R. D. Hellings; J. Allison; A. B. Clegg; F. Foster; G. Hughes; P. Kummer; R. Siddle; B. Dickinson; M. Ibbotson; R. Lawson; H. E. Montgomery; W. J. Shuttleworth; A. Sofair; J. Fannon

doi:10.1016/0550-3213(71)90064-2

Electroproduction of π^o mesons in the region of the first pion-nucleon resonance

R. D. Hellings, J. Allison, A. B. Clegg, F. Foster, G. Hughes, P. Kummer, R. Siddle, B. Dickinson, M. Ibbotson, R. Lawson, H. E. Montgomery, W. J. Shuttleworth, A. Sofair, J. Fannon

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Abstract

The reaction e^-+p→e^-+p+π^o has been studied in the π-N centre of mass range from 1130 to 1340 MeV/c² by detecting the final proton in coincidence with the scattered electron. The four-momentum transfer to the pion-nucleon system was between 0.40 and 0.50 (GeV/c)² and the polarisation of the exchanged virtual photon near unity. The proton angular distribution is analysed phenomenologically in terms of the multipoles M₁₊, E₁₊, S₁₊ contributing to the resonant partial wave and E_o+, S_o+ contributing to the s-wave background. The magnetic dipole excitation M₁₊ is shown to dominate the cross section but clear evidence is obtained for a significant contribution from the scalar multipole S₁₊.

Original language	English (US)
Pages (from-to)	179-188
Number of pages	10
Journal	Nuclear Physics, Section B
Volume	32
Issue number	1
DOIs	https://doi.org/10.1016/0550-3213(71)90064-2
State	Published - 1971
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0550-3213(71)90064-2

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Hellings, R. D., Allison, J., Clegg, A. B., Foster, F., Hughes, G., Kummer, P., Siddle, R., Dickinson, B., Ibbotson, M., Lawson, R., Montgomery, H. E., Shuttleworth, W. J., Sofair, A., & Fannon, J. (1971). Electroproduction of π^o mesons in the region of the first pion-nucleon resonance. Nuclear Physics, Section B, 32(1), 179-188. https://doi.org/10.1016/0550-3213(71)90064-2

@article{9af3a57f0de4499da0959817f855a862,

title = "Electroproduction of πo mesons in the region of the first pion-nucleon resonance",

abstract = "The reaction e-+p→e-+p+πo has been studied in the π-N centre of mass range from 1130 to 1340 MeV/c2 by detecting the final proton in coincidence with the scattered electron. The four-momentum transfer to the pion-nucleon system was between 0.40 and 0.50 (GeV/c)2 and the polarisation of the exchanged virtual photon near unity. The proton angular distribution is analysed phenomenologically in terms of the multipoles M1+, E1+, S1+ contributing to the resonant partial wave and Eo+, So+ contributing to the s-wave background. The magnetic dipole excitation M1+ is shown to dominate the cross section but clear evidence is obtained for a significant contribution from the scalar multipole S1+.",

author = "Hellings, {R. D.} and J. Allison and Clegg, {A. B.} and F. Foster and G. Hughes and P. Kummer and R. Siddle and B. Dickinson and M. Ibbotson and R. Lawson and Montgomery, {H. E.} and Shuttleworth, {W. J.} and A. Sofair and J. Fannon",

year = "1971",

doi = "10.1016/0550-3213(71)90064-2",

language = "English (US)",

volume = "32",

pages = "179--188",

journal = "Nuclear Physics, Section B",

issn = "0550-3213",

publisher = "Elsevier B.V.",

number = "1",

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TY - JOUR

T1 - Electroproduction of πo mesons in the region of the first pion-nucleon resonance

AU - Hellings, R. D.

AU - Allison, J.

AU - Clegg, A. B.

AU - Foster, F.

AU - Hughes, G.

AU - Kummer, P.

AU - Siddle, R.

AU - Dickinson, B.

AU - Ibbotson, M.

AU - Lawson, R.

AU - Montgomery, H. E.

AU - Shuttleworth, W. J.

AU - Sofair, A.

AU - Fannon, J.

PY - 1971

Y1 - 1971

N2 - The reaction e-+p→e-+p+πo has been studied in the π-N centre of mass range from 1130 to 1340 MeV/c2 by detecting the final proton in coincidence with the scattered electron. The four-momentum transfer to the pion-nucleon system was between 0.40 and 0.50 (GeV/c)2 and the polarisation of the exchanged virtual photon near unity. The proton angular distribution is analysed phenomenologically in terms of the multipoles M1+, E1+, S1+ contributing to the resonant partial wave and Eo+, So+ contributing to the s-wave background. The magnetic dipole excitation M1+ is shown to dominate the cross section but clear evidence is obtained for a significant contribution from the scalar multipole S1+.

AB - The reaction e-+p→e-+p+πo has been studied in the π-N centre of mass range from 1130 to 1340 MeV/c2 by detecting the final proton in coincidence with the scattered electron. The four-momentum transfer to the pion-nucleon system was between 0.40 and 0.50 (GeV/c)2 and the polarisation of the exchanged virtual photon near unity. The proton angular distribution is analysed phenomenologically in terms of the multipoles M1+, E1+, S1+ contributing to the resonant partial wave and Eo+, So+ contributing to the s-wave background. The magnetic dipole excitation M1+ is shown to dominate the cross section but clear evidence is obtained for a significant contribution from the scalar multipole S1+.

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U2 - 10.1016/0550-3213(71)90064-2

DO - 10.1016/0550-3213(71)90064-2

M3 - Article

AN - SCOPUS:0041057328

SN - 0550-3213

VL - 32

SP - 179

EP - 188

JO - Nuclear Physics, Section B

JF - Nuclear Physics, Section B

IS - 1

ER -

Electroproduction of π^o mesons in the region of the first pion-nucleon resonance

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