Basis function calculations for the massive Schwinger model in the light- front Tamm--Dancoff approximation (Q685850)

The authors use light-front Tamm-Dancoff integral equations for the massive Schwinger model to obtain the low-lying eigenvalues and eigenstates using polynomial basis functions in the 2-particle and 4- particle sectors of Fock space. The numerical problem is to approximate the coupled integral equations as matrix equations by finding appropriate basis functions. The main results are concentrated on the masses and eigenstates of the first two states for arbitrary fermion mass.