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Evidence for an Isotensor Electromagnetic Current in Pion Photoproduction

A. I. Sanda and Graham Shaw

  • Columbia University, New York, New York 10027

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Phys. Rev. D 3, 243 – Published 1 January, 1971

DOI: https://doi.org/10.1103/PhysRevD.3.243

Abstract

An unambiguous and model-independent test for the presence of isotensor terms in pion photoproduction is suggested. We also show how the conventional theory of photoproduction can be generalized to include such a term, leaving the successful predictions for photoproduction on protons unchanged. Analysis of the available data on π− photoproduction from neutrons yields evidence for striking effects due to such a term. Further experiments are discussed and, in particular, the importance of π− radiative capture experiments, thus avoiding the use of a deuterium target, is stressed.

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Phys. Rev. D 3, 243– Published 1 January, 1971
  • Received 14 May 1970

© 1971 American Physical Society

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