Scalar-Scalar Ladder Model in the Unequal-Mass Case. II ---Numerical Studies of the BS Amplitudes ---
The Bethe-Salpeter amplitudes of the bound states formed by two scalar particles with unequal masses are analyzed in the massive scalar particle exchange ladder model. The norms of the amplitudes are calculated numerically, and it is confirmed that the norm vanishes for the bound state corresponding to the complex eigenvalue of the coupling constant. The behaviour of the Bethe-Salpeter amplitudes in the momentum space is also investigated.
hep-ph↗