Impersonating the Standard Model Higgs boson: alignment without decoupling
By M. Carena, I. Low, N. Shah, C. Wagner. 2013
231 citations recorded by the source corpus.
A bstractIn models with an extended Higgs sector there exists an alignment limit, in which the lightest CP-even Higgs boson mimics the Standard Model Higgs. The alignment limit is commonly associated with the decoupling limit, where all non-standard scalars are significantly heavier than the Z boson. However, alignment can occur irrespective of the mass scale of the rest of the Higgs sector. In this work we discuss the general conditions that lead to “alignment without decoupling”, therefore allowing for the existence of additional non-standard Higgs bosons at the weak scale. The values of tan β for which this happens are derived in terms of the effective Higgs quartic couplings in general two-Higgs-doublet models as well as in supersymmetric theories, including the MSSM and the NMSSM. Moreover, we study the information encoded in the variations of the SM Higgs-fermion couplings to explore regions in the mA − tan β parameter space.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/014066e1e77157fa2eefa0cdac82b63fc35ec361
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In Nuclear and High Energy Physics
- Cms Collaboration
- Atlas Collaboration
- Gudrun Heinrich
- Fabio Maltoni
- M. Grazzini
- Valentin Hirschi
- Stefan Dittmaier
- Ansgar Denner
Citations in the corpus
- The hunt for the rest of the Higgs bosons (2015, background): “In a given extended Higgs sector, this alignment limit may be approached either due to decoupling of additional Higgs states [16, 17], or simply due to the organization of dimensionless couplings in the Higgs potential [13– 15, 18–20].”
- Physics at a 100 TeV pp collider: Higgs and EW symmetry breaking studies (2016, background): “Although this cannot be achieved in the most minimal version of supersymmetric models, alignment without decoupling can occur in supersymmetry with new singlet or triplet states [502] or for extreme values of radiative corrections [416].”
- Maximally symmetric two Higgs doublet model with natural standard model alignment (2014, background): “2 However, for small tanβ values, this is usually attributed to accidental cancellations in the 2HDM potential [26].”
- Building and testing models with extended Higgs sectors (2017, background): “Notice however that alignment can also take place without decoupling, which was illustrated for the 2HDM in [182, 183, 184].”
- The effective Standard Model after LHC Run I (2014, unknown): “We will be interested in particular in the case of the 2HDM in the alignment limit [131, 132], where the light Higgs couples to fermions and gauge bosons as the SM-Higgs, and all new effects are then through loops of the heavy scalars in the 2HDM, as opposed to the usual limits coming from deviation”
- Dark Matter through the Higgs portal (2019, background): “All constraints from the SM–like h signal strengths can be simultaneously satisfied in the so–called alignment limit, β − α = π 2 [404–407].”
- Higgs Physics at the HL-LHC and HE-LHC (2019, methodology): “273 9.3.1 Projection of Run-2 CMS searches for a new scalar resonance decaying to a pair of Z bosons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273 9.4 Additional channels for heavy Higgs bosons . . . . . . . . . . . . . . . . . . . . . . . . 274 9.4.1 Sensitivity to heavy Hig”