Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 11: Top Quark Tagging

T 11.5: Talk

Monday, February 29, 2016, 12:00–12:15, VMP8 SR 05

Introduction to a new top tagging strategy for LHC Run II — Johannes Haller, Roman Kogler, and •Tobias Lapsien — University of Hamburg

Exciting times are ahead, Run II of the LHC started with an increased centre-of-mass energy. New heavy particles might be discovered in this period. Many theories beyond the standard model predict that possible new heavy particles will most likely decay into the heaviest standard model particle, the top quark. Therefore the identification of these quarks might be the key towards new physics. Identifying hadronically decaying top quarks (t → bW → b q q′), while rejecting light flavor jets is challenging since for high transverse momenta of the top quarks its decay products are collimated within one large jet. In this talk a new strategy for identifying top quarks over a large range of transverse momenta, by using a variable jet conesize approach and an on the fly subjet finding will be introduced and explained. Furthermore the comparison to other existing top tagging algorithms will be presented.