Measurements of the muon-neutrino mass

  • M. Daum
  • R. Frosch
  • D. Herter
  • M. Janousch
  • P.-R. Kettle
Conference paper

Abstract

The most precise upper limits for the muonneutrino mass m have been obtained by measuring the muon momentum p μ+ in pion decay π + →μ + ν μ at rest. The current result for the squared neutrino mass, m νμ 2 = -0.154 ± 0.045 MeV 2 , negative by 3.4 standard deviations, indicates that the experimental value for at least one of the three quantities used in the (m νμ 2 )- derivation (p μ +, m π+ , m μ +) is wrong.

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • M. Daum
    • 1
  • R. Frosch
    • 1
  • D. Herter
    • 1
  • M. Janousch
    • 1
  • P.-R. Kettle
    • 1
  1. 1.Paul Scherrer InstituteVilligen-PSISwitzerland

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