Discovery of the Z0 at CERN also yields anomalous events

Abstract

Once the W particle was reported in January, it was almost inevitable that the Z0 particle would eventually be found, provided that both the CERN collider and the two detector groups worked long and hard enough. The discovery of Z0, the neutral intermediate vector boson, was announced on 1 June; the UA1 group said it found five Z0 events. The 270‐GeV protons colliding with 270‐GeV antiprotons had produced four events in which the Z0 decayed into an electron‐positron pair and one in which the Z0 decayed into a μ+μ− pair. On 15 July, the UA2 group also reported finding the Z0.