Phys. Rev. Lett. 83, 4943–4946 (1999)Search for Neutral Heavy Leptons in a High-Energy Neutrino BeamReceived 4 August 1999; published in the issue dated 13 December 1999 A search for neutral heavy leptons (NHLs) has been performed using an instrumented decay channel at the NuTeV (E-815) experiment at Fermilab. The data were examined for NHLs decaying into muonic final states ( μμν, μeν, μπ, and μρ); no evidence has been found for NHLs in the 0.25–2.0 GeV mass range. This analysis places limits on the mixing of NHLs with standard light neutrinos at a level up to an order of magnitude more restrictive than previous search limits in this mass range. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.4943
DOI:
10.1103/PhysRevLett.83.4943
PACS:
13.15.+g, 13.35.Hb, 14.60.Pq, 14.80.-j
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