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Two results from the PIENU Experiment are presented reporting a test oflepton universality in pion decay and improved limits on heavy neutrinoscoupling to positrons. The status of the full analysis for the $\pi^+\rightarrow \mbox{e}^+ \nu$ branching ratio measurement is summarized.

Improved Search for Heavy Neutrinos and a Test of Lepton Universality in the Decay $\pi^+ \rightarrow \mbox{e}^+ \nu$