Florian Staub
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View article: Higgs-mass predictions in the MSSM and beyond
Higgs-mass predictions in the MSSM and beyond Open
Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. The discovery of a Higgs boson and the remarkably precise me…
View article: Collider phenomenology of a unified leptoquark model
Collider phenomenology of a unified leptoquark model Open
We demonstrate that in a recently proposed unified leptoquark model based on the gauge group SU(4)C×SU(2)L×U(1)R significant deviations from the Standard Model values of RK and RK∗ can be accommodated without any need of extra heavy fermio…
View article: Illuminating stealth scenarios at the LHC
Illuminating stealth scenarios at the LHC Open
Several ideas exist on how the stringent mass limits from LHC on new colored particles can be avoided. One idea are the so-called “stealth” scenarios in which missing transversal energy (ET) is avoided due a peculiar mass configuration. It…
View article: Singlet extended standard model in the context of split supersymmetry
Singlet extended standard model in the context of split supersymmetry Open
We consider a low-energy effective theory of the next-to-minimal supersymmetric Standard Model by decoupling all scalar states except one Higgs doublet and the complex gauge singlet. The mass spectrum of the resulting singlet extended Stan…
View article: xBIT: an easy to use scanning tool with machine learning abilities
xBIT: an easy to use scanning tool with machine learning abilities Open
xBIT is a tool for performing parameter scans in beyond the Standard Model theories. It's written in Python and fully open source. The main purpose of xBIT is to provide an easy to use tool to help phenomenologists with their daily task: e…
View article: Review of Calculators for BSM Higgs bosons
Review of Calculators for BSM Higgs bosons Open
We have reached a new era of particle physics in which the properties of the Higgs boson, in particular its mass, turned into precision observables. Therefore, it is necessary to have accurate predictions of these properties in models for …
View article: Theoretical constraints on supersymmetric models: Perturbative unitarity vs. vacuum stability
Theoretical constraints on supersymmetric models: Perturbative unitarity vs. vacuum stability Open
There are nowadays strong experimental constraints on supersymmetric theories from the Higgs measurements as well as from the null results in Sparticle searches. However, even the parameter spaces which are in agreement with experimental d…
View article: Revisiting RGEs for general gauge theories
Revisiting RGEs for general gauge theories Open
We revisit the renormalisation group equations (RGE) for general\nrenormalisable gauge theories at one- and two-loop accuracy. We identify and\ncorrect various mistakes in the literature for the $\\beta$-functions of the\ndimensionful Lagr…
View article: Review of Calculators for BSM Higgs bosons
Review of Calculators for BSM Higgs bosons Open
We have reached a new era of particle physics in which the properties of the Higgs boson, in particular its mass, turned into precision observables. Therefore, it is necessary to have accurate predictions of these properties in models for …
View article: Unitarity constraints in triplet extensions beyond the large <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>s</mml:mi></mml:math> limit
Unitarity constraints in triplet extensions beyond the large limit Open
Triplet extensions are attractive alternatives to the standard model (SM) of\nparticle physics. While models with only one triplet are highly constrained by\nelectroweak precision observables, this is not necessarily the case once\nseveral…
View article: WCxf: An exchange format for Wilson coefficients beyond the Standard Model
WCxf: An exchange format for Wilson coefficients beyond the Standard Model Open
We define a data exchange format for numerical values of Wilson coefficients of local operators parameterising low-energy effects of physics beyond the Standard Model. The format facilitates interfacing model-specific Wilson coefficient ca…
View article: Perturbativity constraints in BSM models
Perturbativity constraints in BSM models Open
Phenomenological studies performed for non-supersymmetric extensions of the Standard Model usually use tree-level parameters as input to define the scalar sector of the model. This implicitly assumes that a full on-shell calculation of the…
View article: The ultraviolet landscape of two-Higgs doublet models
The ultraviolet landscape of two-Higgs doublet models Open
We study the predictions of generic ultraviolet completions of two-Higgs doublet models. We assume that at the matching scale between the two-Higgs doublet model and an ultraviolet complete theory – which can be anywhere between the TeV an…
View article: Unitarity constraints on general scalar couplings with SARAH
Unitarity constraints on general scalar couplings with SARAH Open
We present an update of the Mathematica package SARAH to calculate unitarity constraints in BSM models. The new functions can perform an analytical and numerical calculation of the two-particle scattering matrix of (uncoloured) scalars. We…
View article: Reopen parameter regions in two-Higgs doublet models
Reopen parameter regions in two-Higgs doublet models Open
The stability of the electroweak potential is a very important constraint for models of new physics. At the moment, it is standard for Two-Higgs doublet models (THDM), singlet or triplet extensions of the standard model to perform these ch…
View article: Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond
Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond Open
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 w…
View article: Spontaneous charge breaking in the NMSSM : dangerous or not?
Spontaneous charge breaking in the NMSSM : dangerous or not? Open
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 exp…
View article: Introduction to SARAH and related tools
Introduction to SARAH and related tools Open
I give in this lecture an overview of the features of the Mathematica package SARAH, and explain how it can be used together with other codes to study all aspects of a BSM model.The focus will be on the description of the analytical calcul…
View article: Tutorial to SARAH
Tutorial to SARAH Open
I give in this brief tutorial a short practical introduction to the Mathematica package SARAH. First, it is shown how an existing model file can be changed to implement a new model in SARAH. In the second part, masses, vertices and renorma…