Scalar bosons with Coulomb potentials in a cosmic string background: scattering and bound states Francisco A. Cruz Neto, Franciele M. da Silva, Luis C. N. Santos and Luis B. Castro Eur. Phys. J. Plus, 135 1 (2020) 25 Published online: 08 January 2020 DOI: 10.1140/epjp/s13360-019-00062-7