Kosmologische Phasenübergänge: feldtheoretische und numerische Weiterentwicklungen
Zusammenfassung der Projektergebnisse
In this project we investigated the use of the so-called 2PI formalism for the study of cosmological phase transitions. This formalism has the advantage of encoding nonequilibrium aspects. We have developed a software-package named KBS solving the equations of motion which are a coupled system partial integro-differential equations. The current version is designed for use in 1+1 space-time dimensions and can easily be extended for use in higher space-time dimensions. We have investigated basic toy models containing the main features of cosmological phase transitions. Moreover, we have developed an on-shell scheme for the renormalized equations of motions which allows for a quantitative comparison with other schemes. Finally we have investigated the generation of the observed baryon asymmetry of the Universe via leptogenesis in so-called scotogenic models.
Projektbezogene Publikationen (Auswahl)
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Temperature effects on the Z2 symmetry breaking in the scotogenic model. Physical Review D, 105(3).
Alvarez, Alexandre; Cepedello, Ricardo; Hirsch, Martin & Porod, Werner
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Accommodating muon (g − 2) and leptogenesis in a scotogenic model. Journal of High Energy Physics, 2023(6).
Alvarez, A.; Banik, A.; Cepedello, R.; Herrmann, B.; Porod, W.; Sarazin, M. & Schnelke, M.
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Renormalized equations of motion for scalars and fermions in the 2PI formalism. International Journal of Modern Physics A, 39(21).
Banik, A.; Hinrichsen, H. & Porod, W.
