Convergence to self-similarity for the Boltzmann equation for strongly inelastic Maxwell molecules

We prove propagation of regularity, uniformly in time, for the scaled solutions of the inelastic Maxwell model for any value of the coefficient of restitution. The result follows from the uniform in time control of the tails of the Fourier transform of the solution, normalized in order to have constant energy. By standard arguments this implies the convergence of the scaled solution towards the stationary state in Sobolev and $L^1$L1 norms in the case of regular initial data as well as the convergence of the original solution to the corresponding self-similar cooling state. In the case of weak inelasticity, similar results have been established by E. A. Carlen, J. A. Carrillo and M. C. Carvalho in [Ann. Inst. H. Poincaré Anal. Non Linéaire 26 (2009), no. 5, 1675--1700; MR2566705 (2010i:82155)] via a precise control of the growth of the Fisher information.