2017/10/31 by Jordy de Vries, Marieke Postma, Jorinde van de Vis +1 · 84 citations
Computer Science · Physics and Astronomy · #Baryogenesis #Computational Physics and Python Applications #Effective action #Effective field theory #Electroweak interaction #Field (mathematics) #Higgs boson #Neutrino Physics Research #Particle physics theoretical and experimental studies #Standard Model (mathematical formulation) #Thermal quantum field theory #astro-ph.CO #hep-ph
paper · pdf · doi:10.1007/jhep01(2018)089
published in Journal of High Energy Physics 2018(1) (Springer Nature) · 21 pages + appendices. V2: Corrected a factor-2 mistake which has changed the results for the baryon asymmetry quantitatively. Main conclusions of the v1 still hold
openalex created_date 2017/10/20 · arxiv created 2017/11/16 · openalex publication_date 2018/01/01 · arxiv updated 2018/02/14 · openalex updated_date 2026/08/06
We investigate electroweak baryogenesis within the framework of the Standard Model Effective Field Theory. The Standard Model Lagrangian is supplemented by dimension-six operators that facilitate a strong first-order electroweak phase transition and provide sufficient CP violation. Two explicit scenarios are studied that are related via the classical equations of motion and are therefore identical at leading order in the effective field theory expansion. We demonstrate that formally higher-order dimension-eight corrections lead to large modifications of the matter-antimatter asymmetry. The effective field theory expansion breaks down in the modified Higgs sector due to the requirement of a first-order phase transition. We investigate the source of the breakdown in detail and show how it is transferred to the CP-violating sector. We briefly discuss possible modifications of the effective field theory framework.