Evidence for H -> lly and searches for new physics involving photons with ATLAS

by Anthony Morley (CERN)

Tuesday 23 Mar 2021, 12:30 → 13:30 America/Los_Angeles

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Abstract:

After a long search the Higgs Boson was discovered in 2012 effectively completing the Standard Model of particle physics.  However,  we know the SM is not the whole story as it can’t explain a number of observed phenomena such as dark matter or neutrino masses.  Direct searches for such phenomena and precision measurements of the Higgs boson properties may reveal direct or indirect evidence for physical phenomena beyond the standard theory.

This seminar presents recent searches of such in final states with photons at the LHC using the ATLAS detector. Reported are the first evidence of the three-body decay of the Higgs boson into a low-mass lepton pair and a photon, a search for invisible particle production associated with a Higgs boson decaying into two photons, and a search for a heavy diphoton resonance.

ATLAS_SearchesWithPhotons2021-SLAC2.pdf

Recording