Anatomy of the electroweak phase transition for dark sector induced baryogenesis

Author:

Carena Marcela,Li Ying-YingORCID,Ou Tong,Wang Yikun

Abstract

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 $$ \mathcal{L} $$ L = 139 fb1 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.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. High-temperature electroweak baryogenesis with composite Higgs;Journal of High Energy Physics;2023-12-19

2. Low scale seesaw mechanism with local lepton number;Physical Review D;2023-10-11

3. Status of electroweak baryogenesis in minimal composite Higgs;Journal of High Energy Physics;2023-08-03

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