Triple Higgs couplings in the 2HDM: the complete picture
The measurement of the triple Higgs coupling is one of the main tasks of the (HL-)LHC and future lepton colliders. Similarly, triple Higgs couplings involving BSM Higgs bosons are of high interest. Within the framework of Two Higgs Doublet Models (2HDM) we investigate the allowed ranges for all trip...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/705875 |
| Acceso en línea: | http://hdl.handle.net/10486/705875 https://dx.doi.org/10.1140/epjc/s10052-022-10485-9 |
| Access Level: | acceso abierto |
| Palabra clave: | Higgs Higgs Bosons Scalar Física |
| Sumario: | The measurement of the triple Higgs coupling is one of the main tasks of the (HL-)LHC and future lepton colliders. Similarly, triple Higgs couplings involving BSM Higgs bosons are of high interest. Within the framework of Two Higgs Doublet Models (2HDM) we investigate the allowed ranges for all triple Higgs couplings involving at least one light, SM-like Higgs boson. We present newly the allowed ranges for 2HDM type III and IV and update the results within the type I and II. We take into account theoretical constraints from unitarity and stability, experimental constraints from direct BSM Higgs-boson searches, measurements of the rates of the SM-like Higgs-boson at the LHC, as well as flavor observables and electroweak precision data. For the SM-type triple Higgs coupling w.r.t. its SM value, λhhh/ λSM, we find allowed intervals of ∼ [- 0.5 , 1.3] in type I and ∼ [0.5 , 1.0] in the other Yukawa types. These allowed ranges have important implications for the experimental determination of this coupling at future collider experiments. We find the coupling λhhH between ∼ - 1.5 and ∼ + 1.5 in the four Yukawa types. For the triple Higgs couplings involving two heavy neutral Higgs bosons, λhHH and λhAA we find values between ∼ - 0.5 and ∼ 16 , and between ∼ - 1 and ∼ 32 for λhH+H-. These potentially large values could lead to strongly enhanced production of two Higgs-bosons at the HL-LHC or high-energy lepton colliders |
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