Heavy to light Higgs boson decays at NLO in the singlet extension of the Standard Model

Bojarski, F.; Chalons, Guillaume; López-Val, David; Robens, Tania

doi:10.1007/jhep02(2016)147

Cited by 63 publications

(78 citation statements)

References 179 publications

(372 reference statements)

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“…This is the case for typical singlet-extended Higgs sectors, e.g. the real singlet model [42], and thereby the N2HDM singlet scalar. In all these cases the singlet field is disconnected from the gauge sector and hence invariant under global gauge transformations.…”

Section: Treatment Of the Tadpolesmentioning

confidence: 90%

“…The results of ref. [47], together with [42], show that for a gauge-singlet scalar the quantity ∆vs in the standard scheme is UV finite at one loop order.…”

Section: Treatment Of the Tadpolesmentioning

confidence: 94%

“…One of our authors worked on the renormalization of the SM extended by a real singlet field, cf. [42]. In this paper, we combine our expertise gained in the renormalization of the 2HDM and the singlet-extended SM and provide the complete renormalization of the N2HDM.…”

Section: Jhep12(2017)077mentioning

confidence: 99%

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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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Section: Treatment Of the Tadpolesmentioning

confidence: 90%

“…The results of ref. [47], together with [42], show that for a gauge-singlet scalar the quantity ∆vs in the standard scheme is UV finite at one loop order.…”

Section: Treatment Of the Tadpolesmentioning

confidence: 94%

See 1 more Smart Citation

Gauge-independent renormalization of the N2HDM

Krause

López-Val

Mühlleitner

et al. 2017

J. High Energ. Phys.

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show abstract

“…This model has been widely studied in the literature , also in the context of electroweak higher order corrections [53,54] or offshell and interference effects [33,34,[55][56][57][58][59]. Here, we present an update of the exploration of the model parameter space presented in Ref.…”

Section: Introductionmentioning

confidence: 99%

LHC benchmark scenarios for the real Higgs singlet extension of the standard model

2016

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We present benchmark scenarios for searches for an additional Higgs state in the real Higgs singlet extension of the Standard Model in Run 2 of the LHC. The scenarios are selected such that they fulfill all relevant current theoretical and experimental constraints, but can potentially be discovered at the current LHC run. We take into account the results presented in earlier work and update the experimental constraints from relevant LHC Higgs searches and signal rate measurements. The benchmark scenarios are given separately for the low-mass and high-mass region, i.e. the mass range where the additional Higgs state is lighter or heavier than the discovered Higgs state at around 125 GeV. They have also been presented in the framework of the LHC Higgs Cross Section Working Group.

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“…There has been a lot of effort to improve the predictions of the decay widths for new Higgs-like scalars not only in the minimal supersymmetric standard model (MSSM) and the next-to-minimal supersymmetric standard (NMSSM) [40], but also in several singlet and doublet extensions of the SM [41][42][43][44][45][46][47]. These results are implemented in public tools such as HDECAY [48,49], FeynHiggs [50][51][52] or NMSSMCALC [53].…”

Section: Introductionmentioning

confidence: 99%

Generic calculation of two-body partial decay widths at the full one-loop level

2017

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We describe a fully generic implementation of two-body partial decay widths at the full one-loop level in the SARAH and SPheno framework compatible with most supported models. It incorporates fermionic decays to a fermion and a scalar or a gauge boson as well as scalar decays into two fermions, two gauge bosons, two scalars or a scalar and a gauge boson. We present the relevant generic expressions for virtual and real corrections. Whereas wave-function corrections are determined from on-shell conditions, the parameters of the underlying model are by default renormalised in a DR (or MS) scheme. However, the user can also define model-specific counter-terms. As an example we discuss the renormalisation of the electric charge in the Thomson limit for top-quark decays in the standard model. One-loopinduced decays are also supported. The framework additionally allows the addition of mass and mixing corrections induced at higher orders for the involved external states. We explain our procedure to cancel infrared divergences for such cases, which is achieved through an infrared counter-term taking into account corrected Goldstone boson vertices. We compare our results for sfermion, gluino and Higgs decays in the minimal supersymmetric standard model (MSSM) against the public codes SFOLD, FVSFOLD and HFOLD and explain observed differences. Radiatively induced gluino and neutralino decays are compared against the original implementation in SPheno in the MSSM. We exactly reproduce the results of the code CNNDecays for decays of neutralinos and charginos in R-parity violating models. The new version SARAH 4.11.0 by default includes the calculation of a

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Heavy to light Higgs boson decays at NLO in the singlet extension of the Standard Model

Cited by 63 publications

References 179 publications

Gauge-independent renormalization of the N2HDM

Gauge-independent renormalization of the N2HDM

LHC benchmark scenarios for the real Higgs singlet extension of the standard model

Generic calculation of two-body partial decay widths at the full one-loop level

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