2-9 July 2014
Valencia, Spain
Europe/Madrid timezone

Kinematic reconstruction of vector-like tops from fully hadronic events

5 Jul 2014, 11:30
Auditorium 2 ()

Auditorium 2

Oral presentation Beyond the Standard Model Beyond the Standard Model


Mr. Martin Stoll (The University of Tokyo)


Vector-like top partners are introduced in various BSM models. After mixing with third generation quarks, decays to th, tZ and bW are possible. Recent searches at the LHC give M > 700-800 GeV. We propose an algorithm to kinematically reconstruct vector-like tops from fully hadronic final states at the LHC Run II. Larger signal yield is expected because the branching ratio top-to-hadrons is large. Jet unclustering / substructure methods prove useful in efficiently rejecting the overwhelming backgrounds. We tag and reconstruct boosted tops and higgses from the heavy decay. Different values of the heavy particle's mass are investigated at moderate integrated luminosity, and smaller branching ratios are discussed. A good signal-to-background ratio is found and it is shown that kinematic reconstruction of the top partner and a mass measurement are possible. We conclude that our study can usefully complement existing searches in (semi)leptonic final states. Paper in preparation.

Primary authors

Mr. Kazuya Ishikawa (The University of Tokyo) Prof. Koichi Hamaguchi (The University of Tokyo) Mr. Martin Stoll (The University of Tokyo) Prof. Motoi Endo (The University of Tokyo)

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