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T: Fachverband Teilchenphysik

T 55: Experimentelle Methoden: Effizienzen

T 55.7: Vortrag

Dienstag, 10. März 2015, 18:15–18:30, K.12.20 (K2)

Jet-substructure tools and boosted hadronic boson identification in CMS — •Ivan Shvetsov, Matthias Mozer, and Thomas Müller — Institut für Experimentelle Kernphysik (IEKP), KIT

At the double central-mass energy in Run II boosted hadronic vector boson decays will be of greater importance than in Run I. One of the main challenges for the reconstruction of such hadronic decays in the coming LHC run will be increase of instantaneous luminosity which will result in a large number of additional proton-proton interactions (pileup). In particular the high pileup environment degrades the reconstruction of jet properties. In this talk the performance of several pileup mitigation tools such as charge hadron subtraction, pileup per particle identification (PUPPI) and grooming techniques is presented. Improvements of techniques for the identification of hadronically decaying vector bosons under the challenging conditions of Run II are also discussed.