Search for new Phenomena in dijet events with the ATLAS detector at LHC

Final states with two jets represent one of the main channels when searching fornew phenomena in high-energy experiments, because of the high statistics. Dijetsevents are recorded by ATLAS during the Run2 period at the centre-of-mass energyof 13 TeV. Invariant-mass and angular distributions are analyzed and compared toStandard Model background predictions, seeking for evidence of New Physicssignals over the dominant QCD contribution. Information from the dijet angularcorrelations has been deployed to improve the sensitivity towards broadresonances. Results are interpreted in the context of Standard Model extensions,focusing on a particular dark-matter model.