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23–26 Sept 2025
DESY Hamburg
Europe/Berlin timezone

CP-violation in complex-singlet extension of 2HDM

24 Sept 2025, 16:45
15m
Bldg. 1b, seminar room 4b (DESY)

Bldg. 1b, seminar room 4b

DESY

Particle Phenomenology Parallel Sessions Wednesday Pheno 1

Speaker

Jayita Lahiri (UNI/TH (Uni Hamburg, Institut fuer Theoretische Physik))

Description

We explore the possibility of CP-violation in the complex-singlet extension of 2HDM. The addition of complex singlet paves the way for additional sources of CP-violation compared to 2HDM. If a Z2-symmetry is imposed on the complex-singlet, it can accommodate a dark matter candidate as well. We identify the regions of parameter space, that can fit DM observables and at the same time generate sufficient CP-violation. The amount of CP-violation gets severely constrained from electric-dipole moment experiments, which we take into account. We also consider all existing theoretical and experimental bounds on the model parameter space. Finally, we probe the CP-violation in this model at future collider experiments.

Primary author

Jayita Lahiri (UNI/TH (Uni Hamburg, Institut fuer Theoretische Physik))

Presentation materials