No significant excess is observed in a search for top-philic resonances in four-top-quark events with two leptons, and 95% confidence-level upper limits are set for mediator masses from 500 GeV to 4 TeV.
Boosted Top Quarks and Jet Structure
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abstract
The Large Hadron Collider (LHC) is the first machine that provides high enough energy to produce large numbers of boosted top quarks. The decay products of these top quarks are confined to a cone in the top quark flight direction and can be clustered to a single jet. Top quark reconstruction then amounts to analysing the structure of the jet and looking for subjets that are kinematically compatible with top quark decay. Many techniques have been developed recently to best use these topologies to identify top quarks in a large background of non-top jets. This article reviews the results obtained using LHC data recorded in the years 2010-2012 by the experiments ATLAS and CMS. Studies of Standard Model top quark production and searches for new massive particles that decay to top quarks are presented.
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Search for a resonance in events with four top quarks decaying into two leptons and jets in proton-proton collisions
No significant excess is observed in a search for top-philic resonances in four-top-quark events with two leptons, and 95% confidence-level upper limits are set for mediator masses from 500 GeV to 4 TeV.