Any l-state solutions of the Klein–Gordon equation with the generalized Hulthén potential

We present analytical solutions of the Klein–Gordon equation with non-zero l values for the general Hulthén potential within the framework of an approximation to the centrifugal potential for any l-states. The explicit expressions of bound state energy eigenvalues and eigenfunctions are derived. Three special cases, s-wave, standard Hulthén potential and ground state are discussed.