Abstract
The spin-1/2 Aharonov-Bohm problem is examined in the Galilean limit for the case in which a Coulomb potential is included. It is found that the application of the self-adjoint extension method to this system yields singular solutions only for one-half the full range of the flux parameter, which is allowed in the limit of a vanishing Coulumb potential. Thus one has a remarkable example of a case in which the condition of normalizability is necessary but not sufficient for the occurrence of singular solutions. Expressions for the bound state energies are derived. Also the conditions for the occurrence of singular solutions are obtained when the nongauge potential is \ensuremath{\xi}/${\mathit{r}}^{\mathit{p}}$ (0\ensuremath{\le}p2).
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