https://doi.org/10.1140/epjc/s10052-022-10089-3
Regular Article - Theoretical Physics
Shining light into the Higgs portal with 
colliders
1
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
Received:
6
April
2021
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
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3
