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An upper limit on the \(\tau\) neutrino mass from three- and five-prong tau decays

  • ALEPH Collaboration
  • R. Barate et al.
Experimental physics

Abstract.

A bound on the tau neutrino mass is established using the data collected from 1991 to 1995 at \(\sqrt{s} \simeq m_{Z}\) with the ALEPH detector. Two separate limits are derived by fitting the distribution of visible energy vs invariant mass in \(\tau^{-} \rightarrow 2\pi^{-} \pi^{+} \nu_{\tau}\) and \(\tau^{-} \rightarrow 3\pi^{-} 2\pi^{+} (\pi^{0}) \nu_{\tau}\) decays. The two results are combined to obtain a 95% confidence level upper limit of 18.2 MeV/c\(^2\) on the mass of the tau neutrino.

Keywords

Confidence Level Invariant Mass Neutrino Mass Visible Energy Aleph Detector 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • ALEPH Collaboration
  • R. Barate et al.
    • 1
  1. 1. Laboratoire de Physique des Particules (LAPP), IN2P3-CNRS, F-74019 Annecy-le-Vieux Cedex, France FR

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