Duffin-Kemmer-Petiau theory in the causal approach
Lunardi, José Tadeu Teles; Manzoni, Luiz Alberto; Escobar, Bruto Max Pimentel; Salvador, Juan Segundo Valverde
Abstract:
In this paper we consider the scalar sector of Duffin-Kemmer-Petiau theory in the framework of Epstein-Glaser causal method. We calculate the lowest order distributions for Compton scattering, vacuum polarization, self-energy and vertex corrections. By requiring gauge invariance of the theory we recover, in a natural way, the scalar propagator of the usual effective theory.