This article reports on a search for dark matter pair production in association with bottom or top quarks

in 20.3 fb-1 of pp collisions collected at sqrt(s) = 8 TeV by the ATLAS detector at the LHC.

Events with large missing transverse momentum are selected when produced in association with

high-momentum jets of which one or more are identified as jets containing b quarks. Final states with top quarks are selected

by requiring a high jet multiplicity and the possibility of a single lepton.

The data are found to be consistent with the Standard Model expectations and limits are set on

the mass scale of effective field theories that describe scalar and tensor interactions between

dark matter and Standard Model particles.