  We identify an intrinsic Hall effect in multiband chiral superconductors in
the absence of a magnetic field (i.e., an anomalous Hall effect). This effect
arises from interband transitions involving time-reversal symmetry-breaking
chiral Cooper pairs. We discuss the implications of this effect for the
putative chiral p-wave superconductor, Sr2RuO4, and show that it can contribute
significantly to Kerr rotation experiments. Since the magnitude of the effect
depends on the structure of the order parameter across the bands, this result
may be used to distinguish between different models proposed for the
superconducting state of Sr2RuO4.
