ScannerS: constraining the phase diagram of a complex scalar singlet at the LHC

Coimbra, R. A.; Sampaio, Marco O. P.; Santos, Rui

doi:10.1140/epjc/s10052-013-2428-4

Cited by 137 publications

(154 citation statements)

References 62 publications

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“…In order to obtain viable data sets we use ScannerS [80,81] to perform extensive scans in the 2HDM parameter space and check for compatibility with the constraints. The program verifies if the tree-level potential is bounded from below by applying the conditions given in [82] and checks for tree-level perturbative unitarity as described in [83].…”

Section: Constraints and Parameter Scanmentioning

confidence: 99%

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Basler

Krause

Mühlleitner

et al. 2017

J. High Energ. Phys.

171

167

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The discovery of the Higgs boson by the LHC experiments ATLAS and CMS has marked a milestone for particle physics. Yet, there are still many open questions that cannot be answered within the Standard Model (SM). For example, the generation of the observed matter-antimatter asymmetry in the universe through baryogenesis can only be explained qualitatively in the SM. A simple extension of the SM compatible with the current theoretical and experimental constraints is given by the 2-Higgs-Doublet Model (2HDM) where a second Higgs doublet is added to the Higgs sector. We investigate the possibility of a strong first order electroweak phase transition in the CP-conserving 2HDM type I and type II where either of the CP-even Higgs bosons is identified with the SM-like Higgs boson. The renormalisation that we apply on the loop-corrected Higgs potential allows us to efficiently scan the 2HDM parameter space and simultaneously take into account all relevant theoretical and up-to-date experimental constraints. The 2HDM parameter regions found to be compatible with the applied constraints and a strong electroweak phase transition are analysed systematically. Our results show that there is a strong interplay between the requirement of a strong phase transition and collider phenomenology with testable implications for searches at the LHC.

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Section: Constraints and Parameter Scanmentioning

confidence: 99%

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Basler

Krause

Mühlleitner

et al. 2017

J. High Energ. Phys.

171

167

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“…The 2HDM is implemented as a model class in ScannerS [61,62], and we used this code to generate our data samples. The theoretical bounds described in the previous section, plus all relevant experimental constraints (available at the time of write-up), are either inbuilt in the code or interfaces with several other codes allow to take them into account in the sample generation.…”

Section: The 2hdm Parameter Spacementioning

confidence: 99%

High scale impact in alignment and decoupling in two-Higgs-doublet models

et al. 2018

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The two-Higgs-doublet model (2HDM) provides an excellent benchmark to study physics beyond the Standard Model (SM). In this work, we discuss how the behavior of the model at high-energy scales causes it to have a scalar with properties very similar to those of the SM-which means the 2HDM can be seen to naturally favor a decoupling or alignment limit. For a type II 2HDM, we show that requiring the model to be theoretically valid up to a scale of 1 TeV, by studying the renormalization group equations (RGE) of the parameters of the model, causes a significant reduction in the allowed magnitude of the quartic couplings. This, combined with B-physics bounds, forces the model to be naturally decoupled. As a consequence, any nondecoupling limits in type II, like the wrong-sign scenario, are excluded. On the contrary, even with the very constraining limits for the Higgs couplings from the LHC, the type I model can deviate substantially from alignment. An RGE analysis similar to that made for type II shows, however, that requiring a single scalar to be heavier than about 500 GeV would be sufficient for the model to be decoupled. Finally, we show that the 2HDM is stable up to the Planck scale independently of which of the CP-even scalars is the discovered 125 GeV Higgs boson.

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“…The model was furthermore included in ScannerS [30,31] along with the theoretical conditions and the available experimental constraints, which then allowed to perform extensive parameter scans for the model. In [23], the work was extended and we compared the N2HDM to other NP extensions with the aim to work out observables that can be used to distinguish between various well-motivated BSM Higgs sectors by using collider data.…”

Section: Jhep12(2017)077mentioning

confidence: 99%

“…These data sets have been generated with the tool ScannerS [30,31]. 11 The applied theoretical constraints require that the vacuum state found by ScannerS is the global minimum, that the N2HDM potential is bounded from below and that tree-level unitarity holds.…”

Section: Jhep12(2017)077mentioning

confidence: 99%

Gauge-independent renormalization of the N2HDM

Krause

López-Val

Mühlleitner

et al. 2017

J. High Energ. Phys.

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Abstract:The Next-to-Minimal 2-Higgs-Doublet Model (N2HDM) is an interesting benchmark model for a Higgs sector consisting of two complex doublet and one real singlet fields. Like the Next-to-Minimal Supersymmetric extension (NMSSM) it features light Higgs bosons that could have escaped discovery due to their singlet admixture. Thereby, the model allows for various different Higgs-to-Higgs decay modes. Contrary to the NMSSM, however, the model is not subject to supersymmetric relations restraining its allowed parameter space and its phenomenology. For the correct determination of the allowed parameter space, the correct interpretation of the LHC Higgs data and the possible distinction of beyond-the-Standard Model Higgs sectors higher order corrections to the Higgs boson observables are crucial. This requires not only their computation but also the development of a suitable renormalization scheme. In this paper we have worked out the renormalization of the complete N2HDM and provide a scheme for the gauge-independent renormalization of the mixing angles. We discuss the renormalization of the Z 2 soft breaking parameter m 2 12 and the singlet vacuum expectation value v S . Both enter the Higgs self-couplings relevant for Higgs-to-Higgs decays. We apply our renormalization scheme to different sample processes such as Higgs decays into Z bosons and decays into a lighter Higgs pair. Our results show that the corrections may be sizable and have to be taken into account for reliable predictions.

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ScannerS: constraining the phase diagram of a complex scalar singlet at the LHC

Cited by 137 publications

References 62 publications

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

High scale impact in alignment and decoupling in two-Higgs-doublet models

Gauge-independent renormalization of the N2HDM

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