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Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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2014 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 11, 039- p.Article in journal (Refereed) Published
Abstract [en]

We explore the room for possible deviations from the Standard Model (SM) Higgs boson coupling structure in a systematic study of Higgs coupling scale factor (kappa) benchmark scenarios using the latest signal rate measurements from the Tevatron and LHC experiments. We employ chi(2) fits performed with HiggsSignals, which takes into account detailed information on signal efficiencies and major correlations of theoretical and experimental uncertainties. All considered scenarios allow for additional non-standard Higgs boson decay modes, and various assumptions for constraining the total decay width are discussed. No significant deviations from the SM Higgs boson coupling structure are found in any of the investigated benchmark scenarios. We derive upper limits on an additional (undetectable) Higgs decay mode under the assumption that the Higgs couplings to weak gauge bosons do not exceed the SM prediction. We furthermore discuss the capabilities of future facilities for probing deviations from the SM Higgs couplings, comparing the high luminosity upgrade of the LHC with a future International Linear Collider (ILC), where for the latter various energy and luminosity scenarios are considered. At the ILC model-independent measurements of the coupling structure can be performed, and we provide estimates of the precision that can be achieved.

Place, publisher, year, edition, pages
2014. no 11, 039- p.
Keyword [en]
Higgs Physics, Beyond Standard Model
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-110748DOI: 10.1007/JHEP11(2014)039ISI: 000344749600002OAI: diva2:773226


Available from: 2014-12-18 Created: 2014-12-17 Last updated: 2014-12-18Bibliographically approved

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Stål, Oscar
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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