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Electromagnetic Currents and the Blankenbecler-Sugar Equation | | F. Coester
; D.O. Riska
; | | Date: |
24 Sep 1993 | | Subject: | nucl-th | | Abstract: | The effective electromagnetic current density for a two-nucleon system that is described by the Blankenbecler-Sugar equation is derived. In addition to the single nucleon currents there are exchange currents of two different origins. The first is the exchange current that is required to compensate for the violation of the continuity equation in the impulse approximation. The second is an exchange current, which arises in the quasipotential reduction from the Bethe-Salpeter equation, and which represents effects of suppressed degrees of freedom. Explicit general expressions are given for both of these exchange currents. The results are applicable to both elastic and inelastic processes. | | Source: | arXiv, nucl-th/9309026 | | Services: | Forum | Review | PDF | Favorites | |
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