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Multi-lepton signatures at LHC from sneutrino dark matter
High Energy Physics - Phenomenology · Submitted 26 Nov 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We point out that if one of these signatures is detected, it might be an indication of sneutrino dark matter.
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The abstract, sentence by sentence
We investigate multi-lepton LHC signals arising from an extension at the grand unification scale of the standard minimal supersymmetric model (MSSM) involving right-handed neutrino superfields. In this framework neutrinos have Dirac masses and the mixed sneutrinos are the lightest supersymmetric particles and hence the dark matter candidates. We analyze the model parameter space in which the sneutrino is a good dark matter particle and has a direct detection cross-section compatible with the LUX bound. Studying the supersymmetric mass spectrum of this region, we find several signatures relevant for LHC, which are distinct from the predictions of the MSSM with neutralino dark matter. For instance two opposite sign and different flavor leptons, three uncorrelated leptons and long-lived staus are the most representative. Simulating both the signal and expected background, we find that the multi-lepton signatures and the long-lived stau are in the reach of the future run of LHC with a luminosity of 100/fb. We point out that if one of these signatures is detected, it might be an indication of sneutrino dark matter.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We investigate multi-lepton LHC signals arising from an extension at the grand unification scale of the standard minimal supersymmetric model (MSSM) involving right-handed neutrino superfields. | contribution 0.99 | 0.87 | 0.04 | asserted 0.93 |
| s1 | In this framework neutrinos have Dirac masses and the mixed sneutrinos are the lightest supersymmetric particles and hence the dark matter candidates. | background 0.36 | 0.23 | 0.06 | asserted 1.00 |
| s2 | We analyze the model parameter space in which the sneutrino is a good dark matter particle and has a direct detection cross-section compatible with the LUX bound. | contribution 0.69 | 0.90 | 0.06 | asserted 0.92 |
| s3 | Studying the supersymmetric mass spectrum of this region, we find several signatures relevant for LHC, which are distinct from the predictions of the MSSM with neutralino dark matter. | result 0.84 | 0.95 | 0.15 | asserted 1.00 |
| s4 | For instance two opposite sign and different flavor leptons, three uncorrelated leptons and long-lived staus are the most representative. | result 0.99 | 0.89 | 0.11 | asserted 0.99 |
| s5 | Simulating both the signal and expected background, we find that the multi-lepton signatures and the long-lived stau are in the reach of the future run of LHC with a luminosity of 100/fb. | result 0.99 | 0.95 | 0.40 | asserted 0.98 |
| s6 | We point out that if one of these signatures is detected, it might be an indication of sneutrino dark matter. | interpretation 1.00 | 0.57 | 0.70 | speculative 0.68 |
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The paper
Original abstract
We investigate multi-lepton LHC signals arising from an extension at the grand unification scale of the standard minimal supersymmetric model (MSSM) involving right-handed neutrino superfields. In this framework neutrinos have Dirac masses and the mixed sneutrinos are the lightest supersymmetric particles and hence the dark matter candidates. We analyze the model parameter space in which the sneutrino is a good dark matter particle and has a direct detection cross-section compatible with the LUX bound. Studying the supersymmetric mass spectrum of this region, we find several signatures relevant for LHC, which are distinct from the predictions of the MSSM with neutralino dark matter. For instance two opposite sign and different flavor leptons, three uncorrelated leptons and long-lived staus are the most representative. Simulating both the signal and expected background, we find that the multi-lepton signatures and the long-lived stau are in the reach of the future run of LHC with a luminosity of 100/fb. We point out that if one of these signatures is detected, it might be an indication of sneutrino dark matter.
Human review
How the literature uses it
14 arXiv papers cite this in 25 sentences
Papers citing it · 13 sentences without a confident label
Contests it 1 paper
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Moreover, we find that the correlation between the relic density and the scattering rate is underestimated in FIG.1 of [ref] .].
A Bayesian analysis of sneutrino DM in the NMSSM with Type-I seesaw mechanism · Introduction · contest 0.80
Builds on it 1 paper
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In this paper, we extend the work of [ref] by investigating to what extent the results from SUSY searches at Run 1 of the LHC, published in terms of so-called Simplified Model Spectra (SMS) limits,[Simplified Models are effective-Lagrangian descriptions involving only a small number of new particles.
Constraints on sneutrino dark matter from LHC Run 1 · Introduction · 1.00
Uses its method or tool 1 paper
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We use the MSSM+RN model implemented in micrOMEGAs 3.2 [ref] (see [ref] ) to compute the decay branching ratios, $$.
Constraints on sneutrino dark matter from LHC Run 1 · Deriving LHC constraints with SModelS · 0.99
Uses its data or values 1 paper
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Using the event selection condition with $E_T> 500$ GeV, it can be found that the corresponding number of background events can be estimated as $N_bgs∼600$ for $ℓ^+ ℓ^- E_T$ [ref] ; that is, the statistical significance can reach $3σ$.
Two-loop radiative seesaw, muon $g-2$, and $\tau$-lepton-flavor violation with DM constraints · Numerical analysis and discussion · 0.81
Cites it as background 6 papers
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Indirect detection and cosmology were discussed in [ref] , and LHC signatures in [ref] (see also [ref] for related LHC studies).
Constraints on sneutrino dark matter from LHC Run 1 · Introduction · 0.96
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A recent analysis of long-lived staus in the MSSM with sneutrinos (which mixed LH-RH states) has been recently presented in Ref. [ref] in which the origin of the long stau lifetime is due to a small mass gap between the LSP and the NLSP.
Displaced vertices and long-lived charged particles in the NMSSM with right-handed sneutrinos · Long-lived charged particles · 0.89
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There have been studies on the possibility of discovering the $B-L$ sneutrino DM at the LHC [ref] .
Distinguishing Neutrino Mass Hierarchies using Dark Matter Annihilation Signals at IceCube · Introduction · 0.84
What it cites · 35 sentences without a confident label
Uses the method or tool of 14 papers
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The FR package produces as well outputs compatible with the public code [ref] (MG5), which we use for the collider analysis at parton level.
MadGraph 5 : Going Beyond · Constraints and Observables · 1.00
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Finally the sampling of the parameter space is done with the code [ref] , which has the tolerance set to 0.5 and the number of live points to 4000[Technically we run two chains, one of them requiring charginos lighter than 900 GeV to have a better sampling for the region accessible to LHC.].
Multimodal nested sampling: an efficient and robust alternative to MCMC methods for astronomical data analysis · Constraints and Observables · 1.00
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Finally the sampling of the parameter space is done with the code [ref] , which has the tolerance set to 0.5 and the number of live points to 4000[Technically we run two chains, one of them requiring charginos lighter than 900 GeV to have a better sampling for the region accessible to LHC.].
MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics · Constraints and Observables · 1.00
Uses data or values from 6 papers
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The dark matter phenomenology is constrained by requiring that the relic abundance matches the value measured by the Planck satellite [ref] and that the sneutrino has a cross-section off nucleus below the LUX exclusion bound [ref] .
First results from the LUX dark matter experiment at the Sanford Underground Research Facility · Constraints and Observables · 0.96
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The dark matter phenomenology is constrained by requiring that the relic abundance matches the value measured by the Planck satellite [ref] and that the sneutrino has a cross-section off nucleus below the LUX exclusion bound [ref] .
Planck 2013 results. XVI. Cosmological parameters · Constraints and Observables · 0.96
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We also consider the constraints coming from the rare decays $B →X_sγ$ [ref] and $B^0_s →μ^+ μ^-$ [ref] .
Averages of b-hadron, c-hadron, and tau-lepton properties as of early 2012 · Constraints and Observables · 0.91
Compares with 1 paper
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The signal we consider here is slightly different from the one assumed in [ref] , as the final state in [ref] contains two same sign leptons, however the third one is a hadronic $τ$, which due to the low efficiency in its identification and simulation we are not tagging.
Signals of a Sneutrino (N)LSP at the LHC · Two same sign leptons · 0.92
Cites as background 14 papers
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The MSSM+RN model we use has been defined in [ref] and is similar to [ref] .
Light mixed sneutrinos as thermal dark matter · Supersymmetric framework · 0.84
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The MSSM+RN model we use has been defined in [ref] and is similar to [ref] .
Sneutrino cold dark matter, a new analysis: relic abundance and detection rates · Supersymmetric framework · 0.84
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The phenomenology of the MSSM+RN model has been investigated in the framework of LHC constraints and direct detection in [ref] and for indirect detection and cosmology in [ref] .
Chargino reconstruction in supersymmetry with long-lived staus · Introduction · 0.95
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