Weak nuclear force

The weak nuclear force or weak interaction is one of the four fundamental
forces of nature. It is most commonly thought to be the cause of beta decay
and the associated radioactivity. It is carried by the W bosons (W+ and W-)
and Z bosons (Z0).

The weak interaction affects:

   * neutrinos
   * charged leptons
   * quarks

The weak interaction enables all lepton and quark particles and
antiparticles to interchange energy, mass and charge - effectively change
into each other.

With a field strength some 109 times less than the strong nuclear force
(10-18 m), its influence is limited to action within the atomic nucleus.
This short range is explained by the large mass of the weak exchange
particles (about 90 Gev).

The electromagnetic force and the weak nuclear force can be described as two
different aspects of a single electroweak force.

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