Anomalous diffusion in non-equilibrium relativistic heavy-ion rapidity spectra

Abstract

There is experimental and theoretical evidence that the broad rapidity distribution of net proton yield in central heavy-ion collisions at SPS energies could be a signal of non-equilibrium properties of the system. We show that the broad rapidity shape can be well reproduced in the framework of a non-linear relativistic Fokker-Planck dynamics which incorporates non-extensive statistics and anomalous diffusion.

Comments: 4 pages, 1 figure, elsart style. To appear in Physica A (proceeding of the conference NEXT2001).)