  The kinetics of a granular planar rotator with a fixed center undergoing
inelastic collisions with bath particles is analyzed both numerically and
analytically by means of the Boltzmann equation. The angular velocity
distribution evolves from quasi-gaussian in the Brownian limit to an algebraic
decay in the limit of an infinitely light particle. In addition, we compare
this model with a planar rotator with a free center. We propose experimental
tests that might confirm the predicted behaviors.
