Heavy Resonance Hunting at the LHC

The need for new physics beyond the Standard Model is apparent given all the evidence collected in experiments throughout the last decades. Many new physics models, that try to explain the deviations from the Standard Model, predict heavy particles that are accessible at the LHC. Although there are different ways to discover new particles, resonance searches belong to one of the most powerful types of analyses. In this talk I will present two different approaches using explicit example. For a quark flavour violating two Higgs doublet model we develop a new superior analysis for a top plus two Higgs final state and compare the results to existing and projected limits. And we use a displaced and prompt lepton jet analysis to study how effects of a parton shower in the dark sector can yield information about the underlying physics.