Extended Higgs sectors at the LHC (A3a)

• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: since 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 396021762

Project A3a targets specifically electroweak baryogenesis for the generation of the baryon-antibaryon asymmetry of the Universe by making a link between Higgs physics, cosmology and collider physics. In a global fit the still allowed amount of CP violation, which is necessary for baryogenesis, is determined; optimal observables for the measurement of CP violation at the LHC are derived. By taking into account all relevant experimental and theoretical constraints at highest possible precision we derive the implications of a strong first order phase transition for the LHC phenomenology of extended Higgs sectors. Furthermore, the spectrum of gravitational waves generated in the phase transition is investigated.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 257: P3H: Particle Physics Phenomenology after the Higgs Discovery
• Applicant Institution: Karlsruher Institut für Technologie
• Project Heads: Professorin Dr. Milada Margarete Mühlleitner; Professor Dr. Tilman Plehn