Neutrino interaction in heavy liquid bubble chamber. First considered as possible example of from decay of intermediate boson W, afterwards interpreted as $\nu + n \rightarrow \mu^{-} + \pi^{0} + p$, $\pi^{0} \rightarrow 2 \Upsilon$

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• Interactions of the 320 MeV $\pi^{+}$ mesons photographed in the 32 cm liquid hydrogen bubble chamber - $\pi^{+} +p \rightarrow n+ \pi^{+} + \pi^{+} \rightarrow \mu^{+} + \nu \rightarrow e^{+} + \nu + \overline\nu$
  por: CERN. Geneva. Track Chambers Division (TC)
  Publicado: (2022)
• Stopping $K^{+}$ in the CERN heavy liquid bubble chamber. The photo shows the body of the chamber as seen by a camera. The enlargement (centre) and its graphic explanation show an example of a $\tau$ decay of a $K^{+}$, ie. $K^{+} \rightarrow \pi^{+} \pi^{+} \pi^{-}$. The 3 pions are seen to stop. The $\pi^{-}$ is absorbed in a nucleus whereas the $\pi^{+}$ decay first into $\mu{+}$ and then in $e^{+} \nu \overline{\nu}$. As can be seen from the photograph, the muons are visible. The visibility of the decay of $\pi \rightarrow \mu$ was an essnetial feature of the X2 and K5 experiments, in order to eliminate background in the study of the $K^{+} \rightarrow \mu^{+} + \pi^{0} + \nu$ and $K^{+} \rightarrow e^{+} + \pi^{+} + \pi^{-} + \nu$ decay modes
  por: CERN. Geneva. Track Chambers Division (TC)
  Publicado: (2022)
• Example of a high-energy inelastic neutrino event of the type $\nu + p \rightarrow \mu^{-} + p + \pi^{+} + \pi^{0}$ found in the CERN heavy liquid chamber. The $\pi^{0}$ formed decays instantly into two $\gamma -rays$ which convert and produce a large electron shower
  por: CERN. Geneva. Track Chambers Division (TC)
  Publicado: (2022)
• Measurement of the $(K^{+} \rightarrow \pi^{0}\mu^{+}\nu)/(K^{+} \rightarrow \pi^{0}e^{+}\nu)$ branching ratio
  por: Heintze, J, et al.
  Publicado: (1977)
• Study of the leptonic decay of hyperons by means of k- stopped in hydrogen : example of $\Sigma^{-}\rightarrow\Lambda^{0}+e^{-}+\overline{\nu}$ decay discovered among the first 100 000 photographs of an experiment in which 300 000 were taken. The $\Sigma^{-}$ produced by the capture of the $K^{-}$ stopped in hydrogen in the saclay 81 cm bubble chamber decays according to the reaction $\Sigma^{-}\rightarrow \Lambda^{0}+e^{-}+\overline{\nu}$ with a ratio of $\frac{\Sigma^{-}\rightarrow \Lambda^{0}+e^{-}+\overline{\nu}}{\Sigma^{-}\rightarrow\eta +\pi^{-}}$
  por: CERN. Geneva. Track Chambers Division (TC)
  Publicado: (2022)