Generic two-loop Higgs mass calculation from a diagrammatic approach

Goodsell, Mark D.; Nickel, Kilian; Staub, Florian

doi:10.1140/epjc/s10052-015-3494-6

Cited by 94 publications

(137 citation statements)

References 65 publications

(105 reference statements)

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“…We also used SARAH to generate a SPheno module [41,42] for the NMSSM. With this module we calculate the SUSY and Higgs masses including NMSSM-specific two-loop corrections [43][44][45] which are important in particular for large |λ| [46,47]. Consequently, the accuracy in the Higgs mass prediction is similar to the MSSM and we use 3 GeV for the theoretical uncertainty in the following.…”

Section: Numerical Resultsmentioning

confidence: 99%

Spontaneous charge breaking in the NMSSM: dangerous or not?

Krauss¹,

Opferkuch²,

Staub

2017

Eur. Phys. J. C

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We investigate the impact of charge-breaking minima on the vacuum stability of the NMSSM. We concentrate on the case of vanishing A-terms in the sfermion sector, i.e. the only potentially dangerous sources of charge breaking are vacuum expectation values of the charged Higgs fields. We find that, in contrast to Two-Higgs-Doublet Models like the MSSM, at both tree and loop level there exist global charge-breaking minima. Consequently, many regions of parameter space are rendered metastable, which otherwise would have been considered stable if these chargebreaking minima were neglected. However, the inclusion of these new scalar field directions has little impact on otherwise metastable vacuum configurations.

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Section: Numerical Resultsmentioning

confidence: 99%

Spontaneous charge breaking in the NMSSM: dangerous or not?

Krauss¹,

Opferkuch²,

Staub

2017

Eur. Phys. J. C

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“…All important two-loop corrections stemming from new particles and/or new interactions are covered as discussed in detail in Refs. [53][54][55]. The calculations make use of the generic results of Refs.…”

Section: Higgs Mass Beyond the Mssmmentioning

confidence: 99%

Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond

Staub

Porod

2017

Eur. Phys. J. C

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For a long time, the minimal supersymmetric standard model (MSSM) with light masses for the supersymmetric states was considered as the most natural extension of the Standard Model of particle physics. Consequently, a valid approximation was to match the MSSM to the precision measurement directly at the electroweak scale. This approach was also utilized by all dedicated spectrum generators for the MSSM. However, the higher the supersymmetric (SUSY) scale is, the bigger the uncertainties which are introduced by this matching. We point out important consequences of a two-scale matching, where the running parameters within the SM are calculated at M Z and evaluated up to the SUSY scale, where they are matched to the full model. We show the impact on gauge coupling unification as well as the SUSY mass spectrum. Also the Higgs mass prediction for large supersymmetric masses has been improved by performing the calculation within an effective SM. The approach presented here is now also available in the spectrum generator SPheno. Moreover, also SARAH was extended accordingly and gives the possibility to study these effects now in many different supersymmetric models.

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“…This information together with generic expressions for various observables is then used to generate Fortran code for SPheno [87,88] which can be used to obtain numerical results. Up to now, one-and twoloop masses [89][90][91], one-loop flavour and precision observables [92], as well as two-and three-body tree-level decays could be obtained via this setup. We have now enhanced the decay calculation to the next level by a generic ansatz to calculate two-body decay widths at the full one-loop level.…”

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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Generic two-loop Higgs mass calculation from a diagrammatic approach

Cited by 94 publications

References 65 publications

Spontaneous charge breaking in the NMSSM: dangerous or not?

Spontaneous charge breaking in the NMSSM: dangerous or not?

Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond

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

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