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T: Fachverband Teilchenphysik
T 92: Higgs Boson: Extended Models 3
T 92.6: Talk
Thursday, March 24, 2022, 17:30–17:45, T-H23
Constraining possible CP-admixtures in modified Higgs sectors — •Marco Menen, Henning Bahl, Philip Bechtle, Elina Fuchs, Sven Heinemeyer, Judith Katzy, Krisztian Peters, Matthias Saimpert, and Georg Weiglein — Physikalisch-Technische Bundesanstalt Braunschweig
The question why an excess of matter over antimatter was produced shortly after the Big Bang is one of the greatest unsolved problems of modern physics. The Standard Model of particle physics cannot explain the amount of CP violation needed for the observed baryon asymmetry of the universe. Additional CP violation may be found in the Higgs sector where a mixed CP state of the 125 GeV Higgs boson is not ruled out experimentally by current search limits.
In this talk, the Higgs Characterization model is presented. It is parameterized by factors ci and ci which modify the scalar and pseudoscalar part of Higgs couplings to other SM particles, respectively. The program HiggsSignals (HS) is used to calculate the resulting Higgs signal rates and compare them to available Run 1 and Run 2 data from the Large Hadron Collider (LHC) at CERN.
The signal rate measurements in HS are complemented by a dedicated CP analysis in the H → ττ decay from CMS. Furthermore, constraints from the current best limit on the electron electric dipole moment are examined to complement the constraints from the LHC. The amount of baryogenesis reachable within the allowed parameter space regions is computed in the vev insertion approximation with optimal parameters.