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Implications of light charginos for Higgs observables, LHC searches and dark matter
High Energy Physics - Phenomenology · Submitted 14 May 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim An important part of the models survive all the constraints and are able to give positive signals at LHC-14TeV and/or XENON1T.
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The abstract, sentence by sentence
A rather high Higgs mass, m_h = 126 GeV, suggests that at least a part of the supersymmetric spectrum of the MSSM may live beyond O(1TeV) and hence inaccessible to the LHC. However, there are theoretical and phenomenological reasons supporting a possibility that charginos and neutralinos remain much closer to the electroweak scale. In this paper, we explore such a scenario in the light of recent Higgs measurements, mainly its di-photon decay rate, where the data might indicate a slight excess over the SM prediction. That excess could be fitted by the contribution of light charginos provided tan(beta) is low to moderate, a possibility that is receiving much attention for other theoretical reasons. We investigate the implications of this scenario for other observables, such as dark matter constraints, electroweak observables and experimental signals at the LHC, like di-lepton, tri-lepton and same-sign dilepton. An important part of the models survive all the constraints and are able to give positive signals at LHC-14TeV and/or XENON1T.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | A rather high Higgs mass, m_h = 126 GeV, suggests that at least a part of the supersymmetric spectrum of the MSSM may live beyond O(1TeV) and hence inaccessible to the LHC. | background 0.99 | 0.07 | 0.04 | hedged possibility 1.00 |
| s1 | However, there are theoretical and phenomenological reasons supporting a possibility that charginos and neutralinos remain much closer to the electroweak scale. | background 0.87 | 0.06 | 0.04 | hedged possibility 0.94 |
| s2 | In this paper, we explore such a scenario in the light of recent Higgs measurements, mainly its di-photon decay rate, where the data might indicate a slight excess over the SM prediction. | contribution 0.98 | 0.45 | 0.05 | hedged possibility 0.68 |
| s3 | That excess could be fitted by the contribution of light charginos provided tan(beta) is low to moderate, a possibility that is receiving much attention for other theoretical reasons. | result 0.48 | 0.15 | 0.09 | hedged possibility 1.00 |
| s4 | We investigate the implications of this scenario for other observables, such as dark matter constraints, electroweak observables and experimental signals at the LHC, like di-lepton, tri-lepton and same-sign dilepton. | contribution 0.98 | 0.80 | 0.06 | asserted 0.87 |
| s5 | An important part of the models survive all the constraints and are able to give positive signals at LHC-14TeV and/or XENON1T. | result 0.99 | 0.85 | 0.75 | asserted 0.94 |
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The paper
Original abstract
A rather high Higgs mass, m_h = 126 GeV, suggests that at least a part of the supersymmetric spectrum of the MSSM may live beyond O(1TeV) and hence inaccessible to the LHC. However, there are theoretical and phenomenological reasons supporting a possibility that charginos and neutralinos remain much closer to the electroweak scale. In this paper, we explore such a scenario in the light of recent Higgs measurements, mainly its di-photon decay rate, where the data might indicate a slight excess over the SM prediction. That excess could be fitted by the contribution of light charginos provided tan(beta) is low to moderate, a possibility that is receiving much attention for other theoretical reasons. We investigate the implications of this scenario for other observables, such as dark matter constraints, electroweak observables and experimental signals at the LHC, like di-lepton, tri-lepton and same-sign dilepton. An important part of the models survive all the constraints and are able to give positive signals at LHC-14TeV and/or XENON1T.
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References
How the literature uses it
11 arXiv papers cite this in 15 sentences
Papers citing it · 9 sentences without a confident label
Compares with it 1 paper
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The enhancement in the TMSSM is significantly larger than the one achievable in the MSSM ($∼20%$ for $R_γγ$) for the same chargino lower mass bound [ref] .
Dark Matter versus h into gamma gamma and h into gamma Z with supersymmetric triplets · Conclusions · 0.97
Cites it as support 2 papers
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Indeed, the triplet superfield involves extra charginos that can largely enhance the diphoton channel [ref] without requiring peculiar features such as large deviations in the main Higgs decay rates, huge stop masses, ultra light charginos or very heavy Higgsinos as it occurs in other scenarios [ref] .
Dark Matter versus h into gamma gamma and h into gamma Z with supersymmetric triplets · Introduction · 0.99
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This expectation was confirmed recently in Ref. [ref] .
Very Light Charginos and Higgs Decays · Introduction · 0.98
Cites it as background 2 papers
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After the discovery of the Higgs boson, studies of the chargino contribution to $Γ(h→γγ)$ in various supersymmetric models [ref] have revived due to a potential enhancement of the Higgs to di-photon rate seen awhile both in the ATLAS and CMS data.
Light Stop Mass Limits from Higgs Rate Measurements in the MSSM: Is MSSM Electroweak Baryogenesis Still Alive After All? · Decoupling Limit with a light stop and a light chargino (scenario C) · 0.82
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Different mechanism of di-photon rate enhancement were discussed in the literature, including the effects of the light staus [ref] or light charginos [ref] .
Dark matter and collider signatures of the MSSM · Higgs mass and $h→γγ$ signal rate · 0.91
What it cites · 38 sentences without a confident label
Uses the method or tool of 5 papers
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In order to find whether our benchmark models are constrained by the published LHC searches we simulate events using [ref] and analyze them using the fast detector simulation package [ref] .
Herwig++ Physics and Manual · Collider constraints and detection prospects · 1.00
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In order to find whether our benchmark models are constrained by the published LHC searches we simulate events using [ref] and analyze them using the fast detector simulation package [ref] .
Delphes, a framework for fast simulation of a generic collider experiment · Collider constraints and detection prospects · 1.00
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They have been obtained using the micrOmegas code [ref] , and are summarised in figure [ref].
Indirect search for dark matter with micrOMEGAs2.4 · Dark Matter bounds · 1.00
Uses data or values from 4 papers
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In particular, the $h→χ^0_1χ^0_1$ process contributes to the invisible width of the Higgs, which is at present bounded from above at roughly 20% [ref] .
Status of invisible Higgs decays · Dark Matter bounds · 0.87
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In particular, the $h→χ^0_1χ^0_1$ process contributes to the invisible width of the Higgs, which is at present bounded from above at roughly 20% [ref] .
Higgs At Last · Dark Matter bounds · 0.87
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In particular, the $h→χ^0_1χ^0_1$ process contributes to the invisible width of the Higgs, which is at present bounded from above at roughly 20% [ref] .
The universal Higgs fit · Dark Matter bounds · 0.87
Compares with 1 paper
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These results are similar to those of [ref] .
The Weak Neutral Current · Electroweak observables · 1.00
Cites as background 2 papers
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Interestingly, the possibility of low $tanβ$ has received much attention in recent times, e.g. it becomes natural when supersymmetric particles are heavy [ref] and shows a rich phenomenology [ref] .
The Higgs Mass as a Signature of Heavy SUSY · Conclusions · 0.84
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Interestingly, the possibility of low $tanβ$ has received much attention in recent times, e.g. it becomes natural when supersymmetric particles are heavy [ref] and shows a rich phenomenology [ref] .
The MSSM Higgs sector at a high $M_{SUSY}$: reopening the low tan$\beta$ regime and heavy Higgs searches · Conclusions · 0.84
Discussion
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