Does the Z particle exist?

Clearly the UA1 team remains cautious about claiming this single 'event' to be a Z particle.

The crucial test of the electro-weak theory will come only when the experimenters have several Z particles under their belts and can say exactly what its mass is.

Z particle (Micropædia article)

The asymmetry can be calculated, and depends on the mass of the Z particle (figure 5).

UA1 and UA2 find the Z particle a few months later, in May 1983.

At the new supercollider in Rutherford Crater's rim, they had found the second Z particle that string theory had long predicted would be there.

The Z particle is the heaviest elementary particle known and serves as a carrier of the weak nuclear force from one subatomic particle to another.

The Z particle decayed almost instanteously, but left a distinctive trace in the collison data.

Physicists are mainly interested in studying the mass, lifetime and decay modes of the Z particle itself.