Critical spin dynamics in EuO

Mode-mode coupling equations have been solved for the decay rates of the hydrodynamic spin fluctuations in the vicinity of the critical point in EuO. Dipolar effects are included. With no adjustable parameters calculated values of the spin-wave linewidth and the paramagnetic spin diffusion constant are in reasonable agreement with available experimental data for $|1-\frac{T}{T_c}|\gtrsim 0.05$.