Difference between revisions of "W-boson"

Latest revision as of 10:04, 1 August 2019

Key Stage 5

Meaning

W-bosons (W) are a type of boson which mediates the weak interaction when charge is exchanged between particles.

About W-bosons

The W-boson is denoted with an upper case W.

The W-boson may carry positive charge as the W⁺ or negative charge as the W^-.

Examples

W-boson interactions for nucleons.

This Feynman Diagram shows the weak interaction in which a neutron decays into a proton.	This Feynman Diagram shows the weak interaction in which a proton decays into a neutron via positron emission.	This Feynman Diagram shows the weak interaction in which a proton captures an electron to become a neutron.

W-boson interactions for quarks

This Feynman Diagram shows the weak interaction in which a down-quark decays into an up-quark. This appears as a neutron becoming a proton, electron and an antielectron-neutrino.	This Feynman Diagram shows the weak interaction in which an up-quark decays into a down-quark via positron emission. This appears as a proton becoming a neutron, positron and electron-neutrino.	This Feynman Diagram shows the weak interaction in which an up-quark captures an electron to become a neutron. This appears as a ground state electron becoming an electron-neutrino while a proton becomes a neutron.

@@ Line 6: / Line 6: @@
 : 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]].
+|}