Search for new phenomena in final states with multiple top quarks with the ATLAS experiment
by
48/2-224 - Madrone
SLAC
With a mass close to the scale of electroweak symmetry breaking, the top quark, besides having a large coupling to the SM Higgs boson, is predicted to have large couplings to new particles hypothesized in many models beyond the Standard Model. Possible new phenomena may enhance the cross sections over SM predictions for various processes involving top quarks, and in particular for the production of four top quarks.
The four top quarks production is one of the rare processes in top quark physics that has large sensitivity to variety of BSM physics effects that could be studied through direct searches, effective filed theory approaches or top quark-Higgs boson anomalous couplings, while at the same time it is interesting in the SM context as a complex QCD process.
The extremely busy final state with multiple jets and leptons, high transverse momenta of all final-state objects, and the presence of hadronically decaying top quarks with collimated topologies allows for development and application of new methods and techniques. In this seminar, I will review the latest ATLAS results in the search for new phenomena in final states with multiple top quarks, as well as mention the projections in the context of the High-Luminosity LHC.
Alden Fan / Christina Ignarra / Eric Miller