We consider the interaction of a finite number of nonrelativistic particles with a positive or zero mass quantum field. We show that in the weak coupling limit the quantum field gives rise to an effective interaction between the particles of a Yukawa or Coulomb type, as well as, in some cases, a mass renormalization. In a simple exactly soluble model we investigate the higher order radiation processes.
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© 1979 American Institute of Physics.
1979
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