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W Boson

The Standard Model of Elementary Particles

Fermilab
Definition: The W boson is a type of fundamental particle that, along with the Z boson, mediates the weak nuclear force. It is a called a boson because it has a quantum spin with an integer value. The W boson has the following properties:
  • +/- 1e electrical charge
  • The anti-particle of a W boson is another W boson.
  • Mass = 80.385 GeV/c2
  • Quantum spin = 1

The W boson was experimentally observed in 1983, earning the 1984 Nobel Prize in Physics for Simon van der Meer and Carlo Rubbia "for their decisive contributions to the large project, which led to the discovery of the field particles W and Z, communicators of weak interaction".

Also Known As: W+ boson, W- boson
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