Anatomy of the electroweak phase transition for dark sector induced baryogenesis
- Creators
- Carena, Marcela
- Li, Ying-Ying
- Ou, Tong
- Wang, Yikun
Abstract
We investigate the electroweak phase transition patterns for a recently proposed baryogenesis model with CP violation originated in the dark sector. The model includes a complex scalar singlet-Higgs boson portal, a U(1)ₗ gauge lepton symmetry with a Z′ gauge boson portal and a fermionic dark matter particle. We find a novel thermal history of the scalar sector, featuring a Z₂ breaking singlet vacuum in the early Universe driven by a dark Yukawa coupling, that induces a one-step strongly first order electroweak phase transition. We explore the parameter space that generates the observed matter-antimatter asymmetry and dark matter relic abundance, while being consistent with constraints from electric dipole moment, collider searches, and dark matter direct detection bounds. The complex singlet can be produced via the Higgs portal and decays into Standard Model particles after traveling a certain distance. We explore the reach for long-lived singlet scalars at the 13 TeV Large Hadron Collider with ℒ = 139 fb⁻¹ and show its impact on the parameter space of the model. Setting aside currently unresolved theoretical uncertainties, we estimate the gravitational wave signatures detectable at future observatories.
Additional Information
© 2023 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 would like to thank Zhen Liu and Yue Zhang for useful discussions and comments. Fermilab is operated by Fermi Research Alliance, LLC under contract number DE-AC02-07CH11359 with the United States Department of Energy. M.C., Y.-Y.L. and Y.W. would like to thank the Aspen Center for Physics, which is supported by the National Science Foundation grant No. PHY-1607611, where part of this work has been done. T.O. is supported by the Visiting Scholars Program of URA. Y.W. is supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award Number DE-SC0011632.Attached Files
Published - JHEP02_2023_139.pdf
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Additional details
- Eprint ID
- 120234
- Resolver ID
- CaltechAUTHORS:20230321-821389800.36
- SCOAP3
- DE-AC02-07CH11359
- Department of Energy (DOE)
- PHY-1607611
- NSF
- Universities Research Association
- DE-SC0011632
- Department of Energy (DOE)
- Created
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2023-05-10Created from EPrint's datestamp field
- Updated
-
2023-05-10Created from EPrint's last_modified field
- Caltech groups
- Walter Burke Institute for Theoretical Physics