Regular Article - Theoretical Physics
Shining light into the Higgs portal with colliders
Instituto de Física Fundamental, CSIC, Serrano 121, 28006, Madrid, Spain
2 Instituto de Física Teórica, IFT-UAM/CSIC, Cantoblanco, 28049, Madrid, Spain
3 Departamento de Física Teórica, Universidad Autónoma de Madrid, 28049, Madrid, Spain
Accepted: 4 February 2022
Published online: 28 February 2022
High-energy colliders constitute a potential running mode of future lepton colliders such as the ILC and CLIC. We study the sensitivity of a high-energy collider to the Higgs portal scenario to a hidden sector above the invisible Higgs decay threshold. We show that such collisions could allow to probe the existence of dark sectors through the Higgs portal with precision competitive with other planned collider facilities, profiting from the unique combination of sizable cross-section with clean final state and collider environment. In addition, this search could cover the singlet Higgs portal parameter space yielding a first-order electroweak phase transition in the early Universe.
© The Author(s) 2022
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