Search for gluino-mediated stop and sbottom pair production in events with b-jets and large missing transverse momentum

A search for pair production of gluinos decaying via third generation squarks to a final states with multiple b-jets and missing transverse momentum is presented. It uses the LHC data collected by the ATLAS detector, corresponding to an integrated luminosity of 36 fb$^{-1}$ collected during 2015 and 2015. No excess above the Standard Model prediction is found and the result is used to set limits on simplified models, extending noticeably the limits set in 2015.