  Non-statistical event-by-event fluctuations of the mean transverse momentum
of charged particles in pp and Pb-Pb collisions are studied using the ALICE
experiment at the LHC. Little collision energy dependence is observed in pp.
The data indicate a common scaling behaviour with event multiplicity from pp to
semi-central Pb-Pb collisions. In central Pb-Pb, the results deviate from this
trend, exhibiting a significant reduction of the fluctuation strength. The
results are compared with measurements in Au-Au collisions at lower energies
and with Monte Carlo simulations.
