The centrality dependence of dynamic fluctuations of the transverse momentum
and the net charge can signal the approach to local thermal equilibrium in
nuclear collisions. I explore this signal by comparing transport-theory
calculations to STAR and PHENIX data at a range of energies. In particular, I
find that this model can describe PHENIX data on the dependence of fluctuations
on the transverse momentum range in which they are measured.Comment: 6 pages, 5 eps figures, Talk given at the 20th Winter Workshop on
Nuclear Dynamics, Trelawny Beach, Jamaica, 15-20 March 200