Bound states in nonrelativistic four-fermion interaction model
A. V. Sinitskaya, E. V. Pavlova
Abstract
The bound states of two particles are studied in frames of non-relativistic quantum field model with current × current type interaction by analyzing the Bethe-Salpeter amplitudes. The Bethe-Salpeter equations are obtained in closed form. The existence of Goldstone mode corresponding to the spontaneous breaking of additional SU(2) symmetry of the model is revealed.
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