Electroweak baryogenesis with vector-like leptons and scalar singlets
We investigate the viability of electroweak baryogenesis in a model with a first order electroweak phase transition induced by the addition of two gauge singlet scalars. A vector-like lepton doublet is introduced in order to provide CP violating interactions with the singlets and Standard Model leptons, and the asymmetry generation dynamics are examined using the vacuum expectation value insertion approximation. We find that such a model is readily capable of generating sufficient baryon asymmetry while satisfying electron electric dipole moment and collider phenomenology constraints.
Additional Information© 2019 The Authors. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Article funded by SCOAP3. We thank Phillip Basler, Christopher Lee, David Morrisey, Hiren Patel and Gaham White for helpful discussions. Feynman diagrams were drawn using the TikZ-Feynman package . This work was supported by the Australian Research Council. Michael J. Ramsey-Musolf was supported in part under U.S. Department of Energy Contract DE-SC0011095.
Published - 10.1007_2FJHEP09_2019_012.pdf
Submitted - 1903.11255.pdf