Increased Yield of ttbb at Hadron Colliders in Low-Energy Supersymmetry
  Light bottom squarks and gluinos have been invoked to explain the b quark pair production excess at the Tevatron. We investigate the associated production of ttbb at hadron colliders in this scenario, and find that the rates for this process are enhanced over the Standard Model prediction. If light gluinos exist, it may be possible to detect them at the Tevatron, and they could easily be observed at the LHC. 
Adam K. Leibovich and David Rainwater (Fermilab)