Work

Primordial black hole formation and multimessenger signals in a complex singlet extension of the standard model

Year: 2026

Type: article

Abstract: We investigate the formation of primordial black holes (PBHs) induced by a first-order electroweak phase transition in a realistic renormalizable framework, the complex singlet extension of the Standard Model. We perform a quantitative analysis of the PBH abundance and identify parameter regions consistent with current microlensing constraints. Furthermore, we show that the same parameter space predicts observable stochastic gravitational waves within the sensitivities of future space-based detectors, as well as a sizable deviation in the Higgs triple coupling that can be probed at future lepton colliders. Our results highlight a comprehensive multimessenger framework in which PBHs, gravitational waves, and collider observations can jointly test the dynamics of a strongly first-order electroweak phase transition in the early Universe.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/cxh3-bpl6

Authors: Fa Peng Huang, Chikako Idegawa, Aidi Yang

Institution: Sun Yat-sen University

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, Sun Yat-sen University, Fundamental Research Funds for the Central Universities

Awards: G8728142562, G8839644805