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Interpreting the CMS $\ell^+\ell^- jj E\!\!\!\!/_{\rm T}$ Excess with a Leptoquark Model
High Energy Physics - Phenomenology · Submitted 14 Jan 2015
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We here show that the decay channel of lepto-quark into Dark Matter can fit another excess claimed by CMS, in $\ell^+\ell^- jj E\!\!\!\!/_{\rm T}$: the event rate, the distribution in di-lepton invariant mass and the rapidity range are compatible with the data.
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The abstract, sentence by sentence
Motivated by excesses in $ee jj$ and $e\nu jj$ channels observed by the CMS collaboration, in 8 TeV LHC data, a model of lepto-quarks with mass around 500 GeV was proposed in the literature. In order to reproduce the claimed event rate, lepto-quarks were assumed to have a significant partial branching ratio into an extra sector, taken to be Dark Matter, other than the canonical $ej$. We here show that the decay channel of lepto-quark into Dark Matter can fit another excess claimed by CMS, in $\ell^+\ell^- jj E\!\!\!\!/_{\rm T}$: the event rate, the distribution in di-lepton invariant mass and the rapidity range are compatible with the data. We provide predictions for the forthcoming Run II of the 14 TeV LHC and discuss aspects of dark matter detection.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Motivated by excesses in $ee jj$ and $e\nu jj$ channels observed by the CMS collaboration, in 8 TeV LHC data, a model of lepto-quarks with mass around 500 GeV was proposed in the literature. | background 1.00 | 0.03 | 0.03 | asserted 0.99 |
| s1 | In order to reproduce the claimed event rate, lepto-quarks were assumed to have a significant partial branching ratio into an extra sector, taken to be Dark Matter, other than the canonical $ej$. | background 0.96 | 0.05 | 0.04 | asserted 0.91 |
| s2 | We here show that the decay channel of lepto-quark into Dark Matter can fit another excess claimed by CMS, in $\ell^+\ell^- jj E\!\!\!\!/_{\rm T}$: the event rate, the distribution in di-lepton invariant mass and the rapidity range are compatible with the data. | result 0.93 | 0.91 | 0.88 | asserted 0.96 |
| s3 | We provide predictions for the forthcoming Run II of the 14 TeV LHC and discuss aspects of dark matter detection. | future work 0.70 | 0.81 | 0.06 | asserted 0.86 |
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The paper
Original abstract
Motivated by excesses in $ee jj$ and $e\nu jj$ channels observed by the CMS collaboration, in 8 TeV LHC data, a model of lepto-quarks with mass around 500 GeV was proposed in the literature. In order to reproduce the claimed event rate, lepto-quarks were assumed to have a significant partial branching ratio into an extra sector, taken to be Dark Matter, other than the canonical $ej$. We here show that the decay channel of lepto-quark into Dark Matter can fit another excess claimed by CMS, in $\ell^+\ell^- jj E\!\!\!\!/_{\rm T}$: the event rate, the distribution in di-lepton invariant mass and the rapidity range are compatible with the data. We provide predictions for the forthcoming Run II of the 14 TeV LHC and discuss aspects of dark matter detection.
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References
How the literature uses it
23 arXiv papers cite this in 27 sentences
Papers citing it · 11 sentences without a confident label
Compares with it 1 paper
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Refs. [ref] also noted the potential for their models to explain the $B$ decay anomalies.[Leptoquarks are also viable explanations of the CMS $ℓℓj j$ anomaly [ref] , see e.g. [ref] .] In contrast with those works, we study a model involving a scalar singlet and vector leptoquarks.
Vector Leptoquarks and the 750 GeV Diphoton Resonance at the LHC · Introduction · 0.81
Cites it as background 14 papers
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Beyond the the Standard Model (BSM) theoretical attempts have been made to account for such an excess in the context of the Minimal Supersymmetric Standard Model (MSSM) [ref] using cascade decays from the sbottom pair production at the LHC, a leptoquark scenario [ref] and superstring inspired models [ref] , where the cascade decay of new particle states give rise to a pair of leptons, two associated jets, and new invisible particles that escape the detector as $$.
Dilepton Mass Endpoint in the NMSSM · Introduction · 0.82
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The $B→K^(*)ℓℓ$ anomalies have inspired many model-building efforts, with the most popular proposals involving exchange of heavy $Z'$ vector bosons [ref] , leptoquarks [ref] or loop-induced transitions [ref] .
$B$ decay anomalies from nonabelian local horizontal symmetry · Introduction · 0.93
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A considerable amount of work has been done on the LQ models - both from the perspective of flavor and of collider physics [ref] .
$b \to c \ell \nu$ anomalies in light of extended scalar sectors · Description · 1.00
What it cites · 16 sentences without a confident label
Uses the method or tool of 4 papers
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The events are then passed onto [ref] for parton showering and hadronization followed by the modelling of detector effects by [ref] .
DELPHES 3, A modular framework for fast simulation of a generic collider experiment · Introduction · 1.00
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We implement the model in [ref] and calculate the branching ratios and cross sections using [ref] .
MadGraph 5 : Going Beyond · Introduction · 1.00
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We implement the model in [ref] and calculate the branching ratios and cross sections using [ref] .
FeynRules - Feynman rules made easy · Introduction · 1.00
Uses data or values from 1 paper
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With $Λ$ being the scale of the portal interaction, and $sinξ$ the pseudoscalar coupling, from Fig.7 of [ref] , it is clear that $m_χ 𝒪(100)$ GeV is allowed by data for $sin^2 ξ 0.7$ with $Λ∼1-5$ TeV.
The Fermionic Dark Matter Higgs Portal: an effective field theory approach · Introduction · 0.84
Cites as background 3 papers
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The options are to have either triplet or singlet DM that could be the fermion $χ$ or the scalar $S$ as discussed thoroughly in [ref] .
Leptoquarks, Dark Matter, and Anomalous LHC Events · Introduction · 0.81
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The purpose of this letter is to point out that the CMS excess can be explained by a different, non-supersymmetric, class of models with leptoquarks (LQs) [ref] - [ref] .
Unification without supersymmetry: neutrino mass, proton decay and light leptoquarks · Introduction · 0.88
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Ref. [ref] explored the parameter space in order to simultaneously satisfy bounds from 4 charged lepton production.
CMS kinematic edge from s-bottoms · Introduction · 0.82
Discussion
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