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Low Fine Tuning in Yukawa-deflected Gauge Mediation
High Energy Physics - Phenomenology · Submitted 21 Dec 2016
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We find that some setups are accessible or already excluded by searches at the Large Hadron Collider, and all our scenarios with a tuning better than about 2\% can be tested at the International Linear Collider.
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The abstract, sentence by sentence
We discuss a class of models with gauge-mediated supersymmetry breaking characterized by a non-unified messenger sector inducing non-standard gaugino mass ratios, as well as by additional contributions to the soft mass terms from a matter-messenger coupling. The well-known effect of this coupling is to generate A-terms at one-loop level, hence raising the Higgs mass without relying on super-heavy stops. At the same time, a hierarchy between Wino and gluino masses, as induced by the non-unified messenger fields, can greatly lower the radiative corrections to the Higgs soft mass term driven by the high-energy parameters, thus reducing the fine tuning. We search for models with low fine tuning within this scenario, and we discuss the spectrum, collider phenomenology, constraints, and prospects of the found solutions. We find that some setups are accessible or already excluded by searches at the Large Hadron Collider, and all our scenarios with a tuning better than about 2\% can be tested at the International Linear Collider.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We discuss a class of models with gauge-mediated supersymmetry breaking characterized by a non-unified messenger sector inducing non-standard gaugino mass ratios, as well as by additional contributions to the soft mass terms from a matter-messenger coupling. | contribution 0.59 | 0.31 | 0.04 | asserted 0.95 |
| s1 | The well-known effect of this coupling is to generate A-terms at one-loop level, hence raising the Higgs mass without relying on super-heavy stops. | background 0.67 | 0.13 | 0.05 | asserted 1.00 |
| s2 | At the same time, a hierarchy between Wino and gluino masses, as induced by the non-unified messenger fields, can greatly lower the radiative corrections to the Higgs soft mass term driven by the high-energy parameters, thus reducing the fine tuning. | background 0.48 | 0.22 | 0.19 | hedged possibility 0.71 |
| s3 | We search for models with low fine tuning within this scenario, and we discuss the spectrum, collider phenomenology, constraints, and prospects of the found solutions. | contribution 0.98 | 0.90 | 0.09 | asserted 0.80 |
| s4 | We find that some setups are accessible or already excluded by searches at the Large Hadron Collider, and all our scenarios with a tuning better than about 2\% can be tested at the International Linear Collider. | result 0.94 | 0.95 | 0.71 | asserted 0.99 |
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The paper
Original abstract
We discuss a class of models with gauge-mediated supersymmetry breaking characterized by a non-unified messenger sector inducing non-standard gaugino mass ratios, as well as by additional contributions to the soft mass terms from a matter-messenger coupling. The well-known effect of this coupling is to generate A-terms at one-loop level, hence raising the Higgs mass without relying on super-heavy stops. At the same time, a hierarchy between Wino and gluino masses, as induced by the non-unified messenger fields, can greatly lower the radiative corrections to the Higgs soft mass term driven by the high-energy parameters, thus reducing the fine tuning. We search for models with low fine tuning within this scenario, and we discuss the spectrum, collider phenomenology, constraints, and prospects of the found solutions. We find that some setups are accessible or already excluded by searches at the Large Hadron Collider, and all our scenarios with a tuning better than about 2\% can be tested at the International Linear Collider.
Human review
How the literature uses it
4 arXiv papers cite this in 7 sentences
Papers citing it · 6 sentences without a confident label
Cites it as support 1 paper
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Based on what we found in previous works [ref] , we expect to find solutions with reduced fine tuning (FT) if the Wino mass is substantially larger than the gluino mass at the unification scale.
Naturalness and Dark Matter in a Realistic Intersecting D6-Brane Model · Introduction · 0.98
What it cites · 54 sentences without a confident label
Uses the method or tool of 2 papers
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In the following, we base our naturalness considerations on the `electro-weak' fine tuning, defined as [ref] [equation]
Radiative natural SUSY with a 125 GeV Higgs boson · Models with low tuning and typical spectra · 0.81
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In the following, we base our naturalness considerations on the `electro-weak' fine tuning, defined as [ref] [equation]
Post-LHC7 fine-tuning in the mSUGRA/CMSSM model with a 125 GeV Higgs boson · Models with low tuning and typical spectra · 0.81
Uses data or values from 6 papers
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The cross section of the direct EW production of $χ^0_1,2$ and $χ^±_1$ is rather large at the LHC with $√(s)=13$ TeV ($≈34$ fb for $μ=500$ GeV, summing together all modes [ref] ) but $χ^0_1$ leaves the detector unseen, and the decay products of $χ^0_2$ and $χ^±_1$ are too soft to be observable at the LHC, due to the small mass gaps.
Precision predictions for electroweak superpartner production at hadron colliders with Resummino · LHC phenomenology · 0.94
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The limits on the Higgsino mass reach up to 450 GeV, but quickly drop for $m_χ^0_1$ above 100$÷$150 GeV or small mass splittings [ref] , hence have no impact on the parameter space of our models.
Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in sqrt(s) = 8TeV pp collisions with the ATLAS detector · LHC phenomenology · 0.81
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The limits on the Higgsino mass reach up to 450 GeV, but quickly drop for $m_χ^0_1$ above 100$÷$150 GeV or small mass splittings [ref] , hence have no impact on the parameter space of our models.
Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector · LHC phenomenology · 0.81
Cites as support 6 papers
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The first condition is facilitated if the messenger sector is such that $b^M_2 >b^M_3$, i.e. the Wino mass exceeds the gluino mass at the messenger scale, as shown in [ref] .
Improving naturalness in Gauge Mediation with non-unified messenger sectors · Models with low tuning and typical spectra · 0.97
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However, this scenario is easily accessible at $e^+ e^-$ colliders with $√(s) ≳2×m_χ^±_1$, such as the International Linear Collider (ILC) [ref] .
Physics at a Higgsino Factory · LHC phenomenology · 0.97
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However, it has been shown that this does not induce unacceptably large flavor-changing neutral current processes, as long as the matter-messenger couplings feature a flavor hierarchical structure resembling that of the ordinary Yukawa interactions [ref] .
Gauge Mediation beyond Minimal Flavor Violation · Model setup and soft masses · 0.96
Cites as background 31 papers
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Models of this kind – sometimes labelled as “Yukawa-deflected gauge mediation” or “Extended gauge mediation” – have been proposed long ago [ref] , and more recently received renewed attention [ref] , especially after the discovery of the Higgs, since they can induce one-loop contributions to the stop A-term $A_t$ – in contrast to ordinary gauge mediation setups – such that $m_h ≃125$ GeV can be accommodated without paying the price of multi-TeV stop masses.
Flavored Gauge Mediation with Discrete Non-Abelian Symmetries · Introduction · 0.93
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Models of this kind – sometimes labelled as “Yukawa-deflected gauge mediation” or “Extended gauge mediation” – have been proposed long ago [ref] , and more recently received renewed attention [ref] , especially after the discovery of the Higgs, since they can induce one-loop contributions to the stop A-term $A_t$ – in contrast to ordinary gauge mediation setups – such that $m_h ≃125$ GeV can be accommodated without paying the price of multi-TeV stop masses.
Flavored Gauge-Mediation · Introduction · 0.93
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Models of this kind – sometimes labelled as “Yukawa-deflected gauge mediation” or “Extended gauge mediation” – have been proposed long ago [ref] , and more recently received renewed attention [ref] , especially after the discovery of the Higgs, since they can induce one-loop contributions to the stop A-term $A_t$ – in contrast to ordinary gauge mediation setups – such that $m_h ≃125$ GeV can be accommodated without paying the price of multi-TeV stop masses.
Relatively Heavy Higgs Boson in More Generic Gauge Mediation · Introduction · 0.93
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