Search for gluino pair production in final states with missing transverse momentum and at least three b-jets using 12.8 fb-1 of pp collisions at sqrt(s) = 8 TeV with the ATLAS Detector.

The results of a search for gluino pair production with multi-$b$-jets final states in 12.8 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=8$~TeV using the ATLAS detector at the LHC are reported. This search is performed in events with large missing transverse momentum, greater than or equal to four or six jets and at least three jets originating from \bquarks. No excess has been found in data with respect to the Standard Model predictions. Results are interpreted in the context of simplified models consisting of a gluino octet and a lightest supersymmetric particle $\tilde{\chi}_1^0$, with gluinos decaying in top or bottom quarks. In case of $\tilde{g} \rightarrow t\bar{t} \tilde{\chi}_1^0$ ($\tilde{g} \rightarrow b\bar{b} \tilde{\chi}_1^0$), gluino masses below 1150 (1240) GeV are excluded for LSP masses below 200 GeV.