Ground state wave functional of a non-local Thirring-like model

We use path-integral methods to analyze the vacuum properties of a recently proposed extension of the Thirring model in which the interaction between fermionic currents is non-potential and also study its long-distance behaviour. We show that the ground state wave functional has a general factored Jastrow form. We also find that it possess an interesting symmetry involving the interchange of density-density and current-current interactions. (author)