Damped dipole-dipole interaction checked for \beta \rightarrow \infty (asymptotically point-dipole). Correct!
For values of \beta < 1 / ( 4 * a / ( 3 * \sqrt(8 * Pi) ) )^1/3, where 'a' is the polarizability,
the results looks more skeptic even thou I have not checked against any true results.