Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 105: Suche nach neuen Teilchen 6

T 105.4: Talk

Thursday, March 30, 2017, 17:30–17:45, JUR 5

Improved mass reconstruction of large-radius jets with the ATLAS detector using tracker and calorimeter information — •Fabrizio Napolitano and Oleg Brandt — Kirchhoff-Institut für Physik (KIP), Heidelberg, Germany

The invariant mass of large-radius jets is a powerful observable to identify hadronic decays of top quarks, W, Z, and Higgs bosons at very high transverse momenta of about 0.5 TeV and above; these decays are an important aspect of the physics potential of the ATLAS detector at the LHC. The track-assisted subjet mass belongs to a series of novel techniques developed to increase the precision of large-radius jet mass reconstruction by improving its resolution at very high transverse momenta. The information from the calorimeter and the tracker is combined on a subjet-by-subjet basis, resulting in an improved performance. The performance of this variable is presented and compared to the traditional calorimeter-based jet mass definition and other observables.