  A search for pair-produced massive coloured scalar particles decaying to a
four-jet final state is performed by the ATLAS experiment at the LHC in
proton-proton collisions at sqrt(s) = 7 TeV. The analysed data sample
corresponds to an integrated luminosity of 4.6 /fb. No deviation from the
Standard Model is observed in the invariant mass spectrum of the two-jet pairs.
A limit on the scalar gluon pair production cross-section of 70 pb (10 pb) is
obtained at the 95% confidence level for a scalar gluon mass of 150 GeV (350
GeV). Interpreting these results as mass limits on scalar gluons, masses
ranging from 150 GeV to 287 GeV are excluded at the 95% confidence level.
