  One of the most studied approaches in phenomenology to introduce the breaking
of Lorentz symmetry is the generic approach. This consist on the modification
of the free particle dispersion relation by the addition of an extra power law
term of order $n$ on energy or momentum. Using this approach in the photon
sector, we have calculated the generic rates for vacuum Cherenkov radiation and
photon decay, for any order $n$, at leading order. Explicit results for the
decay and emission rates for the lowest values of $n$ are also presented.
