Gauge dependence of nonrelativistic calculations of deuteron photodisintegration

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Abstract
The gauge dependence of nonrelativistic calculations of deuteron photodisintegration is investigated within simple one-pion and one-pion-one-rho exchange models with consistent exchange currents and for the realistic Paris and Bonn potentials. If no explicit exchange currents are considered but Siegert operators are used, the gauge dependence increases with energy and amounts to about 5 percent at 140 MeV. Inclusion of the dominant π- and ρ-exchange currents reduces this dependence to less than 1 percent at 140 MeV in contrast to other claims.