Displaced Vertex signatures of a pseudo-Goldstone sterile neutrino

Abstract

Low-scale models of neutrino mass generation often feature sterile neutrinos with masses in the GeV-TeV range, which can be produced at colliders through their mixing with the Standard Model neutrinos. We consider an alternative scenario in which the sterile neutrino is produced in the decay of a heavier particle, such that its production cross section does not depend on the active-sterile neutrino mixing angles. The mixing angles can be accessed through the decays of the sterile neutrino, provided that they lead to observable displaced vertices. We present an explicit realization of this scenario in which the sterile neutrino is the supersymmetric partner of a pseudo-Nambu-Goldstone boson, and is produced in the decays of higgsino-like neutralinos and charginos. The model predicts the active-sterile neutrino mixing angles in terms of a small number of parameters. We show that a sterile neutrino with a mass between a few 10 GeV and 200 GeV can lead to observable displaced vertices at the LHC, and outline a strategy for reconstructing experimentally its mixing angles.

29 pages, 3 figures. Version as published in JHEP

References in corpus (9)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• Collider Probes of Axion-Like Particles
• Multilepton and Lepton Jet Probes of Sub-Weak-Scale Right-Handed Neutrinos
• Arbitrary mass Majorana neutrinos in neutrinoless double beta decay
• Sterile neutrino searches via displaced vertices at LHCb
• Search for Long-Lived Heavy Neutrinos at the LHC with a VBF Trigger
• Long-Lived stop at the LHC with or without R-parity
• Probing baryon asymmetry of the Universe at LHC and SHiP

Cited by in corpus (3)

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• Weak scale right-handed neutrino as pseudo-Goldstone fermion of spontaneously broken $U(1{)}_{L_{\mu }-L_{\tau }}$
• Soft supersymmetry breaking as the sole origin of neutrino masses and lepton number violation