Charting the Higgs self-coupling boundaries
| Autor: | Durieux, Gauthier, McCullough, Matthew, Salvioni, Ennio |
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| Rok vydání: | 2022 |
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| Zdroj: | JHEP 12 (2022) 148 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/JHEP12(2022)148 |
| Popis: | Could new physics first manifest itself in Higgs self-coupling measurements? In other words, how large could deviations in the Higgs self-coupling be, if other Higgs and electroweak measurements are compatible with Standard Model predictions? Using theoretical arguments supported by concrete models we derive a bound on the ratio of self-coupling to single-Higgs coupling deviations in ultraviolet completions of the Standard Model where parameters are not fine-tuned. Broadly speaking, a one-loop hierarchy is allowed. We thus stress that self-coupling measurements at the LHC and future colliders probe uncharted parameter space, presenting discovery potential even in the absence of emerging hints in single-Higgs coupling measurements. For instance, if other observables show less than two-sigma deviations by the end of the LHC programme, the Higgs self-coupling deviations could still exceed 200% in the models discussed, without introducing fine-tuning of ultraviolet parameters. Comment: 24 pages, 5 figures. v2: technical problem fixed in Fig 1, otherwise unchanged. v3: minor changes, matches the published version |
| Databáze: | arXiv |
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