Constraining Sterile Neutrinos from Precision Higgs Data

Abstract

We use the LHC Higgs data to derive updated constraints on electroweak-scale sterile neutrinos that naturally occur in many low-scale seesaw extensions of the Standard Model to explain the neutrino masses. We also analyze the signal sensitivity for a new final state involving a single charged lepton and two jets with missing energy, which arises from the decay of sterile neutrinos produced through the Higgs and $W,Z$ boson mediated processes at the LHC. Future prospects of these sterile neutrino signals in precision Higgs measurements, as well as at a future 100 TeV collider, are also discussed.

21 pages, 6 figures, typos fixed, reference added, matched journal version in PRD

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• Sterile Neutrinos
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• Long-lived Heavy Neutrinos from Higgs Decays
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• Probing Leptogenesis
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• Minimal inverse-seesaw mechanism with Abelian flavour symmetries
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