Summary
In an attempt to apply a Regge-pole treatment to photoproduction it was found that in order to obtain the desired results massive photons have to be introduced into the theory thus allowing effects arising from longitudinal polarization of the photon. A new set of invariant amplitudes for the electroproduction of pions naturally suggest themselves from these considerations.
Riassunto
Nel tentativo di applicare il trattamento dei poli di Regge alla fotoproduzione, si è trovato che, per ottenere i risultati desiderati, si devono introdurre nella teoria fotoni dotati di massa, in modo da consentire gli effetti che derivano dalla polarizzazione longitudinale del fotone. Da queste considerazioni nasce naturalmente un nuovo gruppo di ampiezze invarianti per l’elettroproduzione dei pioni.
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The research reported in this document has been sponsored in part by the Air Force Office of Scientific Research OAR through the European Office Aerospace Research United States Air Force.
This work was begun at California Institute of Technology, Pasadena, Cal., and continued at Moscow State University, Moscow.
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Dombey, N. Regge-pole theory of the photoproduction of pions. Nuovo Cim 31, 1025–1036 (1964). https://doi.org/10.1007/BF02821675
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DOI: https://doi.org/10.1007/BF02821675