Kathrin Becker (Warwick)

Higgs Boson Properties as a Window to New Physics

Abstract: So far, direct searches at the LHC have not observed any hints for physics beyond the Standard Model. New physics outside the reach of direct searches can affect the properties of Standard Model particles at LHC energies. These deviations can be described using general approaches like effective field theories. One of the most promising particles to look for these deviations is the Higgs boson. Additional couplings can affect kinematic distributions, like the transverse momentum of the Higgs boson or the angular difference of the two leading jets, testing properties like its CP symmetry. In my presentation I will discuss different measurement approaches like differential and simplified template cross sections focussing on recent results from the ATLAS experiment in the di-tau final state and for comparison in the di-photon final state. The aim of these measurements is to maximise our knowledge about the Higgs boson with the currently available dataset and make interpretations in effective field theories and specific extensions of the Standard Model possible.