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Interference Effects of the Retardation Term in Pion Photoproduction

Wetherell, A. M. (1959) Interference Effects of the Retardation Term in Pion Photoproduction. Physical Review, 115 (6). pp. 1722-1726. ISSN 0031-899X. http://resolver.caltech.edu/CaltechAUTHORS:WETpr59

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Abstract

It is shown that the difference in behavior of the high-energy (>450 Mev c.m.) total photoproduction cross sections for π+ and π0 can be explained by the presence of the retardation term in the case of the π+ production. The analogy with the behavior at the (3/2, 3/2) resonance is noted. The discussion naturally provides an explanation for the difference in center-of-mass energies of the lower high-energy peak found in π--p scattering and the corresponding peak in the π+ photoproduction. It is felt that the discussion contributes some evidence for the resonance nature of the peaks.


Item Type:Article
Additional Information:©1959 The American Physical Society Received 13 April 1959 I am indebted to Professor R. L. Walker for suggesting an investigation of the total photoproduction cross sectionsand for his constant help and encouragement. Discussions with Professor M. Gell-Mann have been much appreciated. I should also like to thank Professor R. F. Bacher for his interest and hospitality. I am grateful to the Commonwealth Fund of New York for a grant. This work was supported in part by the U.S. Atomic Energy Commission. [A.M.W. was a] Commonwealth Fund Fellow.
Record Number:CaltechAUTHORS:WETpr59
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:WETpr59
Alternative URL:http://dx.doi.org/10.1103/PhysRev.115.1722
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5268
Collection:CaltechAUTHORS
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Deposited On:06 Oct 2006
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