Aachen 2019 – scientific programme
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T: Fachverband Teilchenphysik
T 64: Theorie: Dunkle Materie
T 64.2: Talk
Wednesday, March 27, 2019, 16:15–16:30, S16
CP-Violating Scalar Dark Matter in the N2HDM — •Shruti Patel1, Duarte Azevedo2, Pedro Ferreira3, Margarete Muhlleitner4, Rui Santos5, and Jonas Wittbrodt6 — 1ITP and IKP, Karlsruhe Institute of Technology, Germany — 2Universidade de Lisboa, Portugal — 3Universidade de Lisboa, Portugal — 4ITP, Karlsruhe Institute of Technology, Germany — 5Universidade de Lisboa, Portugal — 6DESY, Hamburg Germany
Several extensions of the Standard Model (SM) containing an additional Higgs doublet and/or singlet provide viable dark matter (DM) candidates or beyond the SM sources of CP violation. However, singlet-doublet models which contain both a DM candidate as well as extra sources of CP violation are rare. In this talk we study such a model containing two scalar doublets and a scalar singlet with a discrete Z2 symmetry. Electroweak symmetry breaking in this model yields SM-like phenomenology, in addition to a hidden scalar sector containing a viable DM candidate. We show that a complex phase in the Lagrangian gives rise to CP violation exclusively in the hidden sector, and consider possible experimental signatures of CP violation. In particular, we study contributions to anomalous gauge couplings from the hidden scalars in the model.