Measurements of the polarisation parameters G and H in positive pion photoproduction

P.J. Bussey,J.G. Rutherglen,P.S.L. Booth,L.J. Carroll,G.R. Court,P.R. Daniel,A.W. Edwards,R. Gamet,P.J. Hayman,J.R. Holt,J.N. Jackson,W.H. Range,C. Wooff,F.H. Combley,W. Galbraith,A. Phillips,V.H. Rajaratnam

Nuclear Physics B（1980）

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摘要

Measurements have been made of the polarisation parameters G and H for the process γp→π+ n in the photon energy range 600–1875 MeV and pion c.m. angles between 30° and 100°. These data were obtained in a double polarisation experiment, in which the polarised photon beam from the Daresbury electron synchrotron was incident upon a polarised proton target. Theoretical predictions from a current analysis are compared with the data.

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