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T: Fachverband Teilchenphysik

T 36: Higgs

T 36.4: Vortrag

Dienstag, 20. März 2018, 17:20–17:35, Z6 - SR 1.010

CP-odd Yukawa Couplings of the 125 GeV Higgs Boson — Margarete Mühlleitner¹, Rui Santos^2,3,4, and •Jonas Wittbrodt⁵ — ¹ITP, KIT, 76128 Karlsruhe, Germany — ²ISEL, Instituto Politecnico de Lisboa 1959-007 Lisboa, Portugal — ³Centro de Fisica Teorica e Computacional, Universidade de Lisboa, 1749-016 Lisboa, Portugal — ⁴LIP, Universidade do Minho, 4710-057 Braga, Portugal — ⁵DESY, Notkestraße 85, 22607 Hamburg, Germany

While precision studies of the 125 GeV Higgs boson get underway, little is still known about a possible CP-violating pseudoscalar admixture to this state. We performed a parameter scan in one of the simplest models with a CP-violating scalar sector, the Complex 2HDM (C2HDM), including the important constraint from the electric dipole moment of the electron. We show that there are still viable scenarios where the Yukawa couplings of the 125 GeV display near maximal CP-violation. Depending on the 2HDM Yukawa type, two intriguing configurations are possible. First, the CP-even and CP-off Yukawa couplings to a given fermion can be of similar size. Second, the Higgs boson can couple as a scalar to certain fermions and as a pseudoscalar to others. These possibilities can lead to interesting observable consequences.