Englert, C. , Jaeckel, J., Spannowsky, M. and Stylianou, P. (2020) Power meets precision to explore the symmetric Higgs portal. Physics Letters B, 806, 135526. (doi: 10.1016/j.physletb.2020.135526)
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Abstract
We perform a comprehensive study of collider aspects of a Higgs portal scenario that is protected by an unbroken ℤ2 symmetry. If the mass of the Higgs portal scalar is larger than half the Higgs mass, this scenario becomes very difficult to detect. We provide a detailed investigation of the model's parameter space based on analyses of the direct collider sensitivity at the LHC as well as at future lepton and hadron collider concepts and analyse the importance of these searches for this scenario in the context of expected precision Higgs and electroweak measurements. In particular we also consider the associated electroweak oblique corrections that we obtain in a first dedicated two-loop calculation for comparisons with the potential of, e.g., GigaZ. The currently available collider projections corroborate an FCC-hh 100 TeV as a very sensitive tool to search for such a weakly-coupled Higgs sector extension, driven by small statistical uncertainties over a large range of energy coverage. Crucially, however, this requires good theoretical control. Alternatively, Higgs signal-strength measurements at an optimal FCC-ee sensitivity level could yield comparable constraints.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Stylianou, Mr Panagiotis and Englert, Professor Christoph |
Authors: | Englert, C., Jaeckel, J., Spannowsky, M., and Stylianou, P. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Physics Letters B |
Publisher: | Elsevier |
ISSN: | 0370-2693 |
ISSN (Online): | 1873-2445 |
Published Online: | 30 May 2020 |
Copyright Holders: | Copyright © 2020 The Authors |
First Published: | First published in Physics Letters B 806:135526 |
Publisher Policy: | Reproduced under a Creative Commons licence |
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