Regular Article - Theoretical Physics
HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons
DESY, Notkestraße 85, 22607, Hamburg, Germany
2 Physikalisches Institut der Universität Bonn, Nußallee 12, 53115, Bonn, Germany
3 Instituto de Física Teórica, (UAM/CSIC), Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain
4 Campus of International Excellence UAM+CSIC, Cantoblanco, 28049, Madrid, Spain
5 Instituto de Física de Cantabria (CSIC-UC), 39005, Santander, Spain
6 Institute for Theoretical Physics (ITP), Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany
Accepted: 14 September 2020
Published online: 6 October 2020
The prediction of additional Higgs bosons is one of the key features of physics beyond the Standard Model (SM) that gives rise to an extended Higgs sector. We assess the sensitivity of the Large Hadron Collider (LHC) in the high luminosity (HL) run alone and in combination with a possible future International Linear Collider (ILC) to probe heavy neutral Higgs bosons. We employ the Minimal Supersymmetric Standard Model (MSSM) as a framework and assume the light -even MSSM Higgs boson to be the Higgs boson observed at . We discuss the constraints on the MSSM parameter space arising from the precision measurements of the rates of the detected signal at and from direct searches for new heavy Higgs bosons in the , and di-Higgs (hh) final states. A new benchmark scenario for heavy Higgs searches in the channel is proposed in this context. For the future Higgs rate measurements at the HL-LHC and ILC two different scenarios are investigated, namely the case where the future rate measurements agree with the SM prediction and the case where the rates agree with the predictions of possible realizations of the MSSM Higgs sector in nature.
© The Author(s) 2020
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Funded by SCOAP3