Title: Anatomy of the electroweak phase transition for dark sector induced baryogenesis

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 \( \mathcal{L} \) = 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.

Authors:

Carena, Marcela  ^[1];

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• Search DOE PAGES for ORCID "0000-0003-0223-5818"

Li, Ying-Ying  ^[2];

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• Search DOE PAGES for ORCID "0000-0003-2580-1974"

Ou, Tong  ^[3];

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• Search DOE PAGES for ORCID "0000-0002-3245-4328"

Wang, Yikun  ^[4]

• Search DOE PAGES for author "Wang, Yikun"
• Search DOE PAGES for ORCID "0000-0003-2839-8834"

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+ Show Author Affiliations

1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States). Enrico Fermi Inst.; Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP)
2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States). Enrico Fermi Inst.
4. California Institute of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics

Publication Date:

Tue Feb 14 00:00:00 EST 2023

Research Org.:

Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); California Institute of Technology (CalTech), Pasadena, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

OSTI Identifier:

1897092

Alternate Identifier(s):

OSTI ID: 2223054

Report Number(s):

FERMILAB-PUB-22-766-T; arXiv:2210.14352
Journal ID: ISSN 1029-8479; oai:inspirehep.net:2170959; TRN: US2310756

Grant/Contract Number:  

AC02-07CH11359; PHY-1607611; SC0011632

Resource Type:

Accepted Manuscript

Journal Name:

Journal of High Energy Physics (Online)

Additional Journal Information:

Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2023; Journal Issue: 2; Journal ID: ISSN 1029-8479

Publisher:

Springer Nature

Country of Publication:

United States

Language:

English

Subject:

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Higgs properties; new gauge interactions; specific BSM phenomenology