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Gauge constraints and electromagnetic properties of off-shell particles

  • Hadron physics
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The European Physical Journal A - Hadrons and Nuclei Aims and scope Submit manuscript

Abstract:

The consequences of the gauge constraints for off-shellness in the electromagnetic (EM) vertices have been considered, using Compton scattering as an example. We have found that even if the gauge constraint for the 3-point EM Green function allows for off-shell effects in the charge (Dirac) form factor, they vanish in the total Compton scattering amplitude due to the gauge constraint for the 4-point EM Green function only. In addition, the representations of the Compton amplitude in terms of either reducible or irreducible vertices are equivalent for conserved currents.

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Authors and Affiliations

  1. Nationaal Instituut voor Kernfysica en Hoge-Energiefysica, P.O. Box 41882, 1009, DB Amsterdam, The Netherlands, , , , , , NL

    S.I. Nagorny

  2. Kernfysisch Versneller Instituut, 9747, AA Groningen, The Netherlands, , , , , , NL

    A.E.L. Dieperink

Authors
  1. S.I. Nagorny
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  2. A.E.L. Dieperink
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Received: 23 March 1999

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Nagorny, S., Dieperink, A. Gauge constraints and electromagnetic properties of off-shell particles . Eur. Phys. J. A 5, 417–428 (1999). https://doi.org/10.1007/s100500050305

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  • DOI: https://doi.org/10.1007/s100500050305

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