Path integral for Klein-Gordon particle in vector plus scalar Hulthén-type potentials

The Greenʹs function for a Klein-Gordon particle subjected to vector plus scalar Hulthén-type potentials is calculated in the path integral approach. The energy spectrum together with the normalized wave functions of the bound states are deduced. Special cases including the pure vector Hulthén potential, the pure attractive scalar Hulthén potential and the Coulomb potential are also analyzed.