Improved Search for Heavy Neutrinos and a Test of Lepton Universality in the Decay $\pi^+ \rightarrow \mbox{e}^+ \nu$
R.E. Mischke, A. Aguilar-Arevalo, M. Aoki, M. Blecher, D.I. Britton,, D. vom Bruch, D.A. Bryman, S. Chen, J. Comfort, S. Cuen-Rochin, L. Doria, P., Gumplinger, A. Hussein, Y. Igarashi, S. Ito, S. Kettell, L. Kurchaninov, L.S., Littenberg, C. Malbrunot, T. Numao, D. Protopopescu
TL;DR
This paper reports on the PIENU experiment's results testing lepton universality in pion decay and setting improved limits on heavy neutrino coupling to positrons, advancing understanding of lepton interactions.
Contribution
It provides new experimental limits on heavy neutrino coupling and tests of lepton universality in pion decay, with ongoing analysis for precise branching ratio measurement.
Findings
Improved limits on heavy neutrino coupling to positrons.
Test of lepton universality in pion decay.
Summary of ongoing analysis for branching ratio.
Abstract
Two results from the PIENU Experiment are presented reporting a test of lepton universality in pion decay and improved limits on heavy neutrinos coupling to positrons. The status of the full analysis for the branching ratio measurement is summarized.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Computational Physics and Python Applications · Dark Matter and Cosmic Phenomena