Naturalness and GUT scale Yukawa coupling ratios in the constrained MSSM

Antusch, Stefan; Maurer, Vinzenz; Monaco, Maurizio; Spinrath, Martin

doi:10.1103/physrevd.85.035025

Cited by 29 publications

(33 citation statements)

References 61 publications

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“…7 As we are going to follow the same approach as in our recent paper [6], we give here just a brief summary of the most important points.…”

Section: Fine-tuning In the Mssmmentioning

confidence: 99%

“…Regarding specific MSSM scenarios, it turns out that in the constrained MSSM (CMSSM) [5] a significant amount of fine-tuning (at least O(100)) is unavoidable to explain a Higgs mass of m h ≈ 125 ÷ 126 GeV. Following our paper [6] on the CMSSM, we thus find it interesting to re-address the naturalness of the MSSM in the context of models where certain universality assumptions on the SUSY parameters are relaxed (e.g. for scalar and gaugino masses).…”

Section: Introductionmentioning

confidence: 99%

“…After discussing several possibilities, we will mainly focus on certain non-universal relations among gaugino masses, whose possible impact on fine-tuning have been studied before the LHC results by [7][8][9]. 6 In this context, we will study the interplay between the fine-tuning, the model predictions for the light Higgs mass and the Grand Unified Theory (GUT) scale ratios of the gaugino masses and of the third family Yukawa couplings, which are key quantities for discriminating among different SUSY (and SUSY GUT) models. In our analysis, we include various relevant experimental constraints, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Naturalness of the non-universal MSSM in the light of the recent Higgs results

Antusch

Calibbi

Maurer

et al. 2013

J. High Energ. Phys.

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We analyse the naturalness of the Minimal Supersymmetric Standard Model (MSSM) in the light of recent LHC results from the ATLAS and CMS experiments. We study nonuniversal boundary conditions for the scalar and the gaugino sector, with fixed relations between some of the soft breaking parameters, and find a significant reduction of finetuning for non-universal gaugino masses. For a Higgs mass of about 125 GeV, as observed recently, we find parameter regions with a fine-tuning of O (10), taking into account experimental and theoretical uncertainties. These regions also survive after comparison with simplified model searches in ATLAS and CMS. For a fine-tuning less than 20 the lightest neutralino is expected to be lighter than about 400 GeV and the lighter stop can be as heavy as 3.5 TeV. On the other hand, the gluino mass is required to be above 1.5 TeV. For non-universal gaugino masses, we discuss which fixed GUT scale ratios can lead to a reduced fine-tuning and find that the recent Higgs results have a strong impact on which ratio is favoured. We also discuss the naturalness of GUT scale Yukawa relations, comparing the non-universal MSSM with the CMSSM.

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“…7 As we are going to follow the same approach as in our recent paper [6], we give here just a brief summary of the most important points.…”

Section: Fine-tuning In the Mssmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Naturalness of the non-universal MSSM in the light of the recent Higgs results

Antusch

Calibbi

Maurer

et al. 2013

J. High Energ. Phys.

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“…5 On the other hand, the actual goldstino direction of the hidden sector may have other components besides Z (as in the model of the following section), in which case the gravitino could also be heavier than χ 0 1 . 6 4 The origin of the SUSY breaking spurion…”

Section: A Concrete Modelmentioning

confidence: 99%

“…Models with non-unified gaugino masses have recently been argued to alleviate the supersymmetric fine-tuning problem in the MSSM [1][2][3][4][5][6][7]. For suitable "focus point" ratios of gaugino masses, the radiative corrections to the Higgs potential cancel out during renormalization group running, yielding an electroweak scale which is much smaller than the typical scale of soft SUSY-breaking masses.…”

Section: Introductionmentioning

confidence: 99%

Focus point gauge mediation in product group unification

Brümmer¹,

Ibe²,

Yanagida³

2013

Physics Letters B

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In certain models of gauge-mediated supersymmetry breaking with messenger fields in incomplete GUT multiplets, the radiative corrections to the Higgs potential cancel out during renormalization group running. This allows for relatively heavy superpartners and for a 125 GeV Higgs while the fine-tuning remains modest. In this paper, we show that such gauge mediation models with "focus point" behaviour can be naturally embedded into a model of SU(5) × U(3) product group unification.

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Low fine tuning in the MSSM with higgsino dark matter and unification constraints

Kowalska

Roszkowski

Sessolo

et al. 2014

J. High Energ. Phys.

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Abstract:We examine the issue of fine tuning in the MSSM with GUT-scale boundary conditions. We identify specific unification patterns and mass relations that can lead to a significant lowering of the fine tuning due to gauginos, scalars, and the µ parameter, relative to the simplest unification conditions. We focus on a phenomenologically interesting region that is favored by the Higgs mass and the relic density where the dark matter is a nearly pure higgsino with mass given by µ 1 TeV while the scalars and gauginos have masses in the multi-TeV regime. There, we find that the fine tuning can be reduced to the level of a few percent. Despite the gluino mass in the ballpark of 2 TeV, resulting mass spectra will be hard to explore at the LHC, but good prospects for detection come from dark matter direct detection experiments. Finally, we demonstrate with a specific example how the conditions and mass relations giving low fine tuning can originate in the context of supergravity and Grand Unified Theories.

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Naturalness and GUT scale Yukawa coupling ratios in the constrained MSSM

Cited by 29 publications

References 61 publications

Naturalness of the non-universal MSSM in the light of the recent Higgs results

Naturalness of the non-universal MSSM in the light of the recent Higgs results

Focus point gauge mediation in product group unification

Low fine tuning in the MSSM with higgsino dark matter and unification constraints

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