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Constraining Elko Dark Matter at the LHC with Monophoton Events
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A mass dimension one fermion, also known as Elko, constitutes a dark matter candidate which might interact with photons at the tree level in a specific fashion. In this work, we investigate the constraints imposed by unitarity and LHC data on this type of interactions using the search for new physics in monophoton events. We found that Elkos which can explain the dark matter relic abundance mainly through electromagnetic interactions are excluded at the 95\%CL by the 8 TeV LHC data for masses up to 1 TeV.
Forward citations
Cited by 2 Pith papers
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Wigner multiplets in QFT: from Wigner degeneracy to Elko fields
Under Lorentz covariance, causality, and canonical quantization, the Wigner superposition field is shown to be uniquely realized by the Elko field, which has mass dimension one and Klein-Gordon kinematics.
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Wigner multiplets in QFT: dark sector and CPT-violating scenarios
The paper builds a local QFT for two-fold Wigner-degenerate spin-1/2 doublets and claims generic interactions violate CPT, but a standard diagonal CPT operator restores the symmetry for its own example.
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