  We consider the Lee-Wick (LW) finite electrodynamics, i.e., the U(1) gauge
theory where a (gauge-invariant) dimension-6 operator containing
higher-derivatives is added to the free Lagrangian of the U(1) sector. Three
bounds on the LW heavy photon mass are then estimated. It is amazing that one
of these bounds, actually the most reliable one, is of the order of the
vectorial bosons masses found in nature. The lowest order modification of the
Coulomb potential due to the presence of the higher-derivative term is obtained
afterward by means of two outstanding methods: one of them is based on the
marriage of quantum mechanics with the nonrelativistic limit of quantum field
theory; the other, pioneered by Dirac, makes use of a gauge-invariant but
path-dependent variables formalism. Interestingly enough, these approaches,
despite being radically different, lead to the same result which seems to
indicate that they are equivalent term by term.
