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      Multilepton and Lepton Jet Probes of Sub-Weak-Scale Right-Handed Neutrinos

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          Abstract

          We propose new searches that exploit the unique signatures of decaying sterile neutrinos with masses below \(M_W\) at the LHC, where they can be produced in rare decays of Standard Model gauge bosons. We show that for few-GeV-scale sterile neutrinos, the LHC experiments can probe mixing angles at the level of \(10^{-4}-10^{-3}\) through powerful searches that look for prompt leptons in association with displaced lepton jets. For higher-mass sterile neutrinos, \({\it i.e.}\), \(M_N \gtrsim 15\) GeV, Run II can explore similarly small mixing angles in prompt multilepton final states. This represents an improvement of up to two orders of magnitude in sensitivity to the sterile neutrino production rate.

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          Author and article information

          Journal
          2015-04-09
          2015-04-17
          Article
          10.1103/PhysRevD.91.093010
          1504.02470
          a017e6d4-c39f-4072-9812-aff7b17d0d8a

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          History
          Custom metadata
          Phys. Rev. D 91, 093010 (2015)
          12 pages, 10 figures. V2: references added, minor typos in manuscript corrected, version submitted to PRD
          hep-ph hep-ex

          High energy & Particle physics
          High energy & Particle physics

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