Dressed vertices
arXiv:nucl-th/0307045 · doi:10.1016/j.physletb.2003.10.104
Abstract
The response of a correlated nuclear system to an external field is discussed. The Bethe-Salpeter equation for the dressed vertex is solved. The kernel of the integral equation for the vertex is chosen consistently with the approximation for the self-energy. This guarantees the fulfillment of the f-sum rule for the response function.