In Old and New Experiments, the 17‐KeV Neutrino Goes Away

For more than a decade now, experiments in high‐energy physics have yielded very few real surprises. Far from being a reproach to the experimenters, this state of affairs is a testament to the encompassing success of the standard model of the elementary particles that took its definitive shape in the 1970s. In the early 1980s the heavy vector bosons, $W±$ and $Z0,$ that mediate the weak interactions were found just about where they were expected, and the millions of $Z0s$ created since then have confirmed the predictions of the standard model in spectacular detail.