Quantum collider probes of the fermionic Higgs portal
Abstract
We explore the sensitivity of future hadron colliders to constrain the fermionic Higgs portal, with a focus on scenarios where the new fermions cannot be directly observed in exotic Higgs decays. This portal emerges in various models including twin-Higgs scenarios and dark matter models, posing significant challenges for collider tests. Working in an effective field theory (EFT), we determine the reach of the high-luminosity option of the Large Hadron Collider (HL-LHC), the high-energy upgrade of the LHC (HE-LHC) and a proposed Future Circular Collider (FCC) in probing the fermionic Higgs portal through off-shell and double-Higgs production. Notably, we find that quantum-enhanced indirect probes offer a better sensitivity than other direct Higgs measurements. We argue that this finding is valid in a wide class of ultraviolet realisations of the EFT. Our study presents a roadmap of a multifaceted search strategy for exploring the fermionic Higgs portal at forthcoming hadron machines.
Keywords
Cite
@article{arxiv.2311.03995,
title = {Quantum collider probes of the fermionic Higgs portal},
author = {U. Haisch and M. Ruhdorfer and K. Schmid and A. Weiler},
journal= {arXiv preprint arXiv:2311.03995},
year = {2024}
}
Comments
33 pages, 14 figures; v2: modified and extended version of the manuscript as published in SciPost