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The ttbar asymmetry measured at the Tevatron continues to disagree withStandard Model predictions at the 3 sigma level. We update the status of thephenomenological light axigluon model in explaining the asymmetry data, takinginto account constraints from the charge asymmetry at the LHC and the ttbarcross section at both Tevatron and LHC. We find that an axigluon with a massbetween 100 and 400 GeV provides an excellent fit to the data. Recent searchesby ATLAS and CMS for pair production of heavy resonances which decay to dijetsrule out axigluons with large branching fractions to dijets. However axigluonswhich predominantly decay to multijets via intermediate resonances are still apossibility. We outline four distinct scenarios which cover the most importantdecay topologies and discuss how one might exclude or discover axigluons asmultijet resonances at the LHC. MadGraph implementations for each of thescenarios are provided.

Light axigluon explanation of the Tevatron ttbar asymmetry and multijet signals at the LHC