Editing Elementary particle (section)

==== Electroweak bosons ====
{{Main|W and Z bosons|Photon}}

There are three [[weak gauge boson]]s: W<sup>+</sup>, W<sup>−</sup>, and Z<sup>0</sup>; these mediate the [[weak interaction]]. The W&nbsp;bosons are known for their mediation in nuclear decay: The W<sup>−</sup> converts a neutron into a proton then decays into an electron and electron-antineutrino pair.
The Z<sup>0</sup> does not convert particle flavor or charges, but rather changes momentum; it is the only mechanism for elastically scattering neutrinos. The weak gauge bosons were discovered due to momentum change in electrons from neutrino-Z exchange. The massless [[photon]] mediates the [[electromagnetism|electromagnetic interaction]]. These four gauge bosons form the electroweak interaction among elementary particles.