A covariant gauge-invariant three-dimensional description of relativistic bound-states

Details A covariant gauge-invariant three-dimensional description of relativistic bound-states A covariant gauge-invariant three-dimensional description of relativistic bound-states

1997-08-15

arxiv.org/abs/nucl-th/9708027v1

Few Body Syst.24:175-191,1998

Physics

Nuclear Physics

Nuclear Theory

17 pages, RevTeX, uses BoxedEPS.tex

Scientific paper

10.1007/s006010050084

A formalism is presented which allows covariant three-dimensional bound-state equations to be derived systematically from four-dimensional ones without the use of delta-functions. The amplitude for the interaction of a bound state described by these equations with an electromagnetic probe is constructed. This amplitude is shown to be gauge invariant if the formalism is truncated at the same coupling-constant order in both the interaction kernel of the integral equation and the electromagnetic current operator.

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