How heavy can dark matter be? Constraining colourful unitarity with SARAH

Goodsell, Mark D.; Moutafis, Rhea

doi:10.1140/epjc/s10052-021-09597-5

Cited by 7 publications

(12 citation statements)

References 60 publications

(59 reference statements)

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“…This model is particularly useful to illustrate how colourful unitarity bounds contribute to a mass limit for dark matter. In our previous paper [8], we had used an iterative approach using several MCMC scans, narrowing in on the region we were interested in. The likelihood function used for the MCMC was artificially weighted in a way that forced it to prioritise points with a higher mass.…”

Section: Highest Singlet Massmentioning

confidence: 99%

“…There now exists a whole chain of tools for computing the properties of general new theories. Most relevant for this work are SARAH [2][3][4][5][6][7][8], SPheno [9,10] and MicrOmegas [11,12], but there exist many others, such as HiggsSignals [13,14], HiggsBounds [15,16], Vevacious/Vevacious++ [17] and FlexibleSUSY [18,19]. Thanks to SUSY Les Houches Accords [20,21], the output of these codes is standardised and can be passed from one to the other in the form of text files.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, for many phenomenologists exploring a model for the first time, the most likely point or region is profoundly uninteresting; for many models they are more likely if we set new physics effects to large masses or very weak couplings. As a more pertinent example, in our previous work [8] we were interested in finding the heaviest possible dark matter mass for a given model; this is a long way away from the most likely region, and we were interested there in exploring the decision boundary itself. There we adapted a simple MCMC algorithm by biasing the likelihood function to favour heavier masses.…”

Section: Introductionmentioning

confidence: 99%

“…In section 2 we describe our algorithm and setup. We then apply AL scans to several models of increasing complexity: first, simple toy models (see section 3), then the CMSSM (section 4), the SMSQQ [8] (section 5), and finally the MDGSSM (section 6). We also compare the performance to standard MCMC scans, and to vanilla neural networks and random forest classifiers (RFCs).…”

Section: Introductionmentioning

confidence: 99%

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Active learning BSM parameter spaces

Goodsell¹,

Ari²

2022

Preprint

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Active learning (AL) has interesting features for parameter scans of new models. We show on a variety of models that AL scans bring large efficiency gains to the traditionally tedious work of finding boundaries for BSM models. In the MSSM, this approach produces more accurate bounds. In light of our prior publication, we further refine the exploration of the parameter space of the SMSQQ model, and update the maximum mass of a dark matter singlet to 48.4 TeV. Finally we show that this technique is especially useful in more complex models like the MDGSSM.

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Section: Highest Singlet Massmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Active learning BSM parameter spaces

Goodsell¹,

Ari²

2022

Preprint

Self Cite

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“…In this particular case the amplitude in the adjoint channel vanishes since the amplitude has only an s−channel contribution and S is a SU(N ) singlet 6. The Mathematica package SARAH[125] performs in automatic way a similar decomposition for pure scalar theories with an SU(N ) group symmetry.…”

mentioning

confidence: 99%

Perturbative unitarity constraints on generic Yukawa interactions

Allwicher

Arnan

Barducci

et al. 2021

J. High Energ. Phys.

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We study perturbative unitarity constraints on generic Yukawa interactions where the involved fields have arbitrary quantum numbers under an ∏iSU(Ni) ⊗ U(1) group. We derive compact expressions for the bounds on the Yukawa couplings for the cases where the fields transform under the trivial, fundamental or adjoint representation of the various SU(N) factors. We apply our results to specific models formulated to explain the anomalous measurements of (g − 2)μ and of the charged- and neutral-current decays of the B mesons. We show that, while these models can generally still explain the observed experimental values, the required Yukawa couplings are pushed at the edge of the perturbative regime.

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Electroweak phase transition in a right-handed neutrino superfield extended NMSSM

Borah

Ghosh

Roy

et al. 2023

J. High Energ. Phys.

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Supersymmetric models with singlet extensions can accommodate single- or multi-step first-order phase transitions (FOPT) along the various constituent field directions. Such a framework can also produce Gravitational Waves, detectable at the upcoming space-based interferometers, e.g., U-DECIGO. We explore the dynamics of electroweak phase transition and the production of Gravitational Waves in an extended set-up of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) with a Standard Model singlet right-handed neutrino superfield. We examine the role of the new parameters compared to NMSSM on the phase transition dynamics and observe that the occurrence of a FOPT, an essential requirement for Electroweak Baryogenesis, typically favours a right-handed sneutrino state below 125 GeV. Our investigation shows how the analysis can offer complementary probes for physics beyond the Standard Model besides the collider searches.

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How heavy can dark matter be? Constraining colourful unitarity with SARAH

Cited by 7 publications

References 60 publications

Active learning BSM parameter spaces

Active learning BSM parameter spaces

Perturbative unitarity constraints on generic Yukawa interactions

Electroweak phase transition in a right-handed neutrino superfield extended NMSSM

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