Theta Dependence of Meson Masses in the Small Mass Limit of the Massive Schwinger Model
Abstract
We present a continuum formulation for
θ
-vacua in the massive Schwinger model on the light-front, where
θ
enters as a background electric field. The effective coupling of the external field is partially screened due to vacuum polarization processes. For small fermion masses and small
θ
we calculate the mass of the meson and find agreement with results from bosonization.