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For several years, the KARMEN experiment was reporting an anomalous signal which was interpreted as a possible existence of heavy sterile neutrinos. The NOMAD experiment has the capability to search for such an isosinglet neutrino. It is assumed that the (ν s ) couples to the ν τ produced in the SPS neutrino beam at CERN. Analysis of NOMAD data leads to a single candidate event, compatible...
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