View source for W-boson

==Key Stage 5==
===Meaning===
'''W-bosons''' ('''W''') are a type of [[boson]] which mediates the [[Weak Nuclear Interaction|weak interaction]] when [[Electrical Charge|charge]] is exchanged between [[Subatomic Particle|particles]].

===About W-bosons===
: The '''W-boson''' is denoted with an upper case '''W'''.
: The '''W-boson''' may carry [[Positive Charge|positive charge]] as the W<sup>+</sup> or [[Negative Charge|negative charge]] as the W<sup>-</sup>.

===Examples===
{| class="wikitable"
|+W-boson interactions for [[nucleon]]s.
|[[File:FeynmanDiagramNeutronDecay.png|center|200px]]
|[[File:FeynmanDiagramPositronEmission.png|center|200px]]
|[[File:FeynmanDiagramElectronCapture.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |This [[Feynman Diagram]] shows the [[Weak Nuclear Interaction|weak interaction]] in which a [[neutron]] [[Radioactive Decay|decays]] into a [[proton]].
| style="height:20px; width:200px; text-align:center;" |This [[Feynman Diagram]] shows the [[Weak Nuclear Interaction|weak interaction]] in which a [[proton]] [[Radioactive Decay|decays]] into a [[neutron]] via [[Positron Emission|positron emission]].
| style="height:20px; width:200px; text-align:center;" |This [[Feynman Diagram]] shows the [[Weak Nuclear Interaction|weak interaction]] in which a [[proton]] [[Electron Capture|captures]] an [[electron]] to become a [[neutron]].
|}

{| class="wikitable"
|+W-boson interactions for [[quark]]s
|[[File:FeynmanDiagramDownDecay.png|center|200px]]
|[[File:FeynmanDiagramUpDecay.png|center|200px]]
|[[File:FeynmanDiagramQuarkElectronCapture.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |This [[Feynman Diagram]] shows the [[Weak Nuclear Interaction|weak interaction]] in which a [[down-quark]] [[Radioactive Decay|decays]] into an [[up-quark]]. This appears as a [[neutron]] becoming a [[proton]], [[electron]] and an [[antielectron-neutrino]].
| style="height:20px; width:200px; text-align:center;" |This [[Feynman Diagram]] shows the [[Weak Nuclear Interaction|weak interaction]] in which an [[up-quark]] [[Radioactive Decay|decays]] into a [[down-quark]] via [[Positron Emission|positron emission]]. This appears as a [[proton]] becoming a [[neutron]], [[positron]] and [[electron-neutrino]].
| style="height:20px; width:200px; text-align:center;" |This [[Feynman Diagram]] shows the [[Weak Nuclear Interaction|weak interaction]] in which an [[up-quark]] [[Electron Capture|captures]] an [[electron]] to become a [[neutron]]. This appears as a [[Ground State|ground state]] [[electron]] becoming an [[electron-neutrino]] while a [[proton]] becomes a [[neutron]].
|}