HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons
- PDF / 2,974,860 Bytes
- 27 Pages / 595.276 x 790.866 pts Page_size
- 52 Downloads / 174 Views
Regular Article - Theoretical Physics
HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons Henning Bahl1,a , Philip Bechtle2 , Sven Heinemeyer3,4,5 , Stefan Liebler6 , Tim Stefaniak1, Georg Weiglein1 1
DESY, Notkestraße 85, 22607 Hamburg, Germany 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
2
Received: 25 June 2020 / Accepted: 14 September 2020 © The Author(s) 2020
Abstract 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 CP-even MSSM Higgs boson to be the Higgs boson observed at 125 GeV. We discuss the constraints on the MSSM parameter space arising from the precision measurements of the rates of the detected signal at 125 GeV and from direct searches for new heavy Higgs bosons in the τ + τ − , bb¯ and di-Higgs (hh) final states. A new benchmark scenario for heavy Higgs searches in the bb¯ 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.
1 Introduction The Large Hadron Collider (LHC) continues to measure the properties of the discovered Higgs boson [1,2] at 125 GeV with increasing precision. So far, given the current experimental and theoretical uncertainties, the measurements are in good agreement with the SM predictions [3–6]. Nevertheless, in certain parameter regions, models with extended Higgs sectors often feature a SM-like Higgs boson that is compatible with the experimental data. Such models, often a e-mail:
[email protected] (corresponding author)
0123456789().: V,-vol
motivated by theoretical arguments or observational puzzles (such as dark matter), are therefore equally viable in the light of the Higgs observation. The MSSM [7–9] is one of the best studied models with an extended Higgs sector. In contrast to the case of the SM, the MSSM contains two Higgs doublet fields. This results in five physical Higgs bosons instead of the single Higgs boson in the SM. These are (in the CP-conserving case, which is assumed throughout this paper) the light and heavy CP-even Higgs bosons, h and H , the CP-odd Higgs
Data Loading...
