ISSN:
1434-601X
Keywords:
PACS:13.40.Gp Electromagnetic form factors – 13.60.Fz Elastic and Compton Scattering – 14.70.Bh Photons
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100500050305
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