Polarisation parameters in positive pion photoproduction

• Published in: Nuclear physics. B Vol. 154; no. 2; pp. 205 - 225
• Main Authors: Bussey, P.J., Raine, C., Rutherglen, J.G., Booth, P.S.L., Carroll, L.J., Court, G.R., Daniel, P.R., Edwards, A.W., Gamet, R., Hardwick, C.J., Hayman, P.J., Holt, J.R., Jackson, J.N., Norem, J.H., Range, W.H., Combley, F.H., Galbraith, W., Rajaratnam, V.H., Sutton, C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.1979
• ISSN: 0550-3213; 1873-1562
• DOI: 10.1016/0550-3213(79)90511-X

Measurements have been made of the polarisation parameters Σ, T and P for the process γp → π +n in the photon energy range 520–2250 MeV at c.m. angles between 30° and 120°. These data were obtained in a double polarisation experiment, using the polarised photon beam from the Daresbury electron synchrotron incident on a polarised proton target. The data are compared with predictions from current theoretical analyses.