Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-10-05
Physics
High Energy Physics
High Energy Physics - Experiment
Proceedings of the DPF-2011 Conference, Providence, RI, August 8-13, 2011
Scientific paper
Measurements are presented of the jet invariant mass and substructure in proton-proton collisions at sqrt{s} = 7 TeV with the ATLAS detector using an integrated luminosity of 37 pb-1. These results exercise the tools for distinguishing the signatures of new boosted massive particles in the hadronic final state. Two "fat" jet algorithms are used, along with the filtering jet grooming technique that was pioneered in ATLAS. New jet substructure observables are compared for the first time to data at the LHC. Finally, a sample of candidate boosted top quark events collected in the 2010 data is analyzed in detail for the jet substructure properties of hadronic "top-jets" in the final state. These measurements demonstrate not only our excellent understanding of QCD in a new energy regime but open the path to using complex jet substructure observables in the search for new physics.
for the ATLAS Collaboration
Miller David W.
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