  We study non-equilibrium noise in the tunnelling current between the edges of
a quantum Hall liquid in the Pfaffian state, which is a strong candidate for
the plateau at $\nu=5/2$. To first non-vanishing order in perturbation theory
(in the tunneling amplitude) we find that one can extract the value of the
fractional charge of the tunnelling quasiparticles. We note however that no
direct information about non-abelian statistics can be retrieved at this level.
If we go to higher-order in the perturbative calculation of the non-equilibrium
shot noise, we find effects due to non-Abelian statistics. They are subtle, but
eventually may have an experimental signature on the frequency dependent shot
noise. We suggest how multi-terminal noise measurements might yield a more
dramatic signature of non-Abelian statistics and develop some of the relevant
formalism.
