Low-energy interaction of composite spin-half systems with scalar and vector fields

Phillips, D. R.; Birse, M. C.; Wallace, S. J.

Low-energy interaction of composite spin-half systems with scalar and vector fields

Authors

Phillips, D. R.

Birse, M. C.

Wallace, S. J.

Description

We consider a composite spin-half particle moving in spatially-varying scalar and vector fields. The vector field is assumed to couple to a conserved charge, but no assumption is made about either the structure of the composite or its coupling to the scalar field. A general form for the piece of the spin-orbit interaction of the composite with the scalar and vector fields which is first-order in momentum transfer ${\bf Q}$ and second-order in the fields is derived.
10 pages, RevTeX