PION PHOTOPRODUCTION AT THRESHOLD AND LOW ENERGY THEOREMS REVISITED

20 January 1991

journal article
Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics A

Vol. 6 (2) , 263-288
https://doi.org/10.1142/s0217751x91000186

Abstract

This paper takes a second look at the methods used in deriving low energy theorems on pion photoproduction using the partially conserved axial vector current (PCAC) hypothesis. The discrepancy between a recent measurement of E_o⁺(γp→π⁰p) and theory is studied. Rescattering corrections to low energy theorems are made. A critique of some recent theory papers on this subject is presented.

Keywords

ELEMENTARY PARTICLES
CURRENT ALGEBRA
CHEMICAL REACTION
QUANTUM MECHANICS

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