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T: Fachverband Teilchenphysik

T 92: Higgs Boson: Extended Models 3

T 92.3: Vortrag

Donnerstag, 24. März 2022, 16:45–17:00, T-H23

Dark Matter Phase Transitions in 'CP in the Dark' — •Lisa Biermann, Margarete Mühlleitner, and Jonas Müller — Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany

We study the possibility of a strong first-order electroweak phase transition (SFOEWPT) in the extended scalar sector model 'CP in the Dark'. 'CP in the Dark' provides a Dark Matter (DM) candidate as well as explicit CP violation in the dark sector. A global minimization of the one-loop daisy-resummed effective potential at finite temperature is performed with the C++ code BSMPT. We find a broad viable parameter space for an SFOEWPT within the reach of XENON1T and future invisible decay searches. 'CP in the Dark' also offers SFOEWPT points that display spontaneous CP violation at finite temperature. Having not only an SFOEWPT that provides the necessary departure from thermal equilibrium, but also a source of additional non-standard CP violation, opens a promising gate towards enabling the creation of the BAU in an electroweak baryogenesis scenario.