Feynman Diagram - Revision history

NRJC: /* Constructing a Feynman Diagram */

2021-03-08T15:58:25Z

‎Constructing a Feynman Diagram

NRJC: /* Constructing a Feynman Diagram */

2019-08-01T09:33:21Z

‎Constructing a Feynman Diagram

NRJC: /* Constructing a Feynman Diagram */

2019-07-31T19:13:56Z

‎Constructing a Feynman Diagram

NRJC: /* Constructing a Feynman Diagram */

2019-07-31T19:11:34Z

‎Constructing a Feynman Diagram

NRJC: /* Constructing a Feynman Diagram */

2019-07-31T19:09:47Z

‎Constructing a Feynman Diagram

NRJC: /* Constructing a Feynman Diagram */

2019-07-31T19:09:31Z

‎Constructing a Feynman Diagram

NRJC: /* Constructing a Feynman Diagram */

2019-07-31T18:57:18Z

‎Constructing a Feynman Diagram

NRJC: /* Constructing a Feynman Diagram */

2019-07-31T18:56:36Z

‎Constructing a Feynman Diagram

NRJC at 18:56, 31 July 2019

2019-07-31T18:56:02Z

NRJC: /* Constructing a Feynman Diagram */

2019-07-31T18:55:24Z

‎Constructing a Feynman Diagram

@@ Line 16: / Line 16: @@
 <math>p + e^-</math>
 | style="height:20px; width:200px; text-align:center;" |
-<math>p + e^- \rightarrow n + \bar\nu_e</math>
+<math>p + e^- \rightarrow n + \nu_e</math>
 | style="height:20px; width:200px; text-align:center;" |
-<math>p + e^- \xrightarrow{W^+} n + \bar\nu_e</math>
+<math>p + e^- \xrightarrow{W^+} n + \nu_e</math>
 |-
 |[[File:FeynmanDiagramElectronCapturePt1.png|center|200px]]

@@ Line 24: / Line 24: @@
 |[[File:FeynmanDiagramElectronCapture.png|center|200px]]
 |-
-| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] prior to the [[Fundamental Interactions|interaction]] are drawn first at the bottom of the '''Feynman diagram'''.
+| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] prior to the [[Fundamental Interactions|interaction]] are drawn first at the bottom of the '''Feynman diagram'''. Both the [[proton]] and [[electron]] in this '''diagram''' are drawn with a steep [[gradient]] to show their relatively small [[velocity]] compared to the [[Speed of Light|speed of light]].
-| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] after the [[Fundamental Interactions|interaction]] are drawn at the top of the '''Feynman diagram'''. It should be recognised that [[Conservation of Baryon Number|baryon conservation]] means a [[baryon]] becomes another [[baryon]] and [[Conservation of Lepton Number|lepton conservation]] means that a [[lepton]] is transformed from one type of [[lepton]] into another.
+| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] after the [[Fundamental Interactions|interaction]] are drawn at the top of the '''Feynman diagram'''. It should be recognised that [[Conservation of Baryon Number|baryon conservation]] means a [[baryon]] becomes another [[baryon]] and [[Conservation of Lepton Number|lepton conservation]] means that a [[lepton]] is transformed from one type of [[lepton]] into another. The [[Electron-neutrino|electron-neutrino]] in this [[diagram]] is drawn with a shallow [[gradient]] to show that it travels close to the [[Speed of Light|speed of light]].
 | style="height:20px; width:200px; text-align:center;" |Finally the [[boson]] mediating the [[Fundamental Interactions|interaction]] is added as a [[wave]] between the two points of [[Fundamental Interactions|interaction]]. In this case a [[proton]] loses its [[Positive Charge|positive charge]] therefore it is carried away to the [[electron]] via the [[W-boson|W<sup>+</sup> boson]] transforming the [[electron]] into an [[Electron-neutrino|electron-neutrino]].
 |}
@@ Line 42: / Line 42: @@
 |[[File:FeynmanDiagramNeutronDecay.png|center|200px]]
 |-
-| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] prior to the [[Fundamental Interactions|interaction]] are drawn first at the bottom of the '''Feynman diagram'''.
+| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] prior to the [[Fundamental Interactions|interaction]] are drawn first at the bottom of the '''Feynman diagram'''. The [[neutron]] in this '''diagram''' is drawn with a steep [[gradient]] to show it has a relatively small [[velocity]] compared to the [[Speed of Light|speed of light]].
-| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] after the [[Fundamental Interactions|interaction]] are drawn at the top of the '''Feynman diagram'''. It should be recognised that [[Conservation of Baryon Number|baryon conservation]] means a [[baryon]] becomes another [[baryon]] and [[Conservation of Lepton Number|lepton conservation]] means that if a [[lepton]] comes into existence there must also be an [[antilepton]].
+| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] after the [[Fundamental Interactions|interaction]] are drawn at the top of the '''Feynman diagram'''. It should be recognised that [[Conservation of Baryon Number|baryon conservation]] means a [[baryon]] becomes another [[baryon]] and [[Conservation of Lepton Number|lepton conservation]] means that if a [[lepton]] comes into existence there must also be an [[antilepton]]. The [[antielectron-neutrino|antielectron-neutrino]] in this [[diagram]] is drawn with a shallow [[gradient]] to show that it travels close to the [[Speed of Light|speed of light]].
 | style="height:20px; width:200px; text-align:center;" |Finally the [[boson]] mediating the [[Fundamental Interactions|interaction]] is added as a [[wave]] between the two points of [[Fundamental Interactions|interaction]]. In this case a [[neutron]] loses a [[Negative Charge|negative charge]] therefore it is carried away to produce the [[electron]] via the [[W-boson|W<sup>-</sup> boson]] also producing an [[antielectron-neutrino]].
 |}

@@ Line 44: / Line 44: @@
 | style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] prior to the [[Fundamental Interactions|interaction]] are drawn first at the bottom of the '''Feynman diagram'''.
 | style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] after the [[Fundamental Interactions|interaction]] are drawn at the top of the '''Feynman diagram'''. It should be recognised that [[Conservation of Baryon Number|baryon conservation]] means a [[baryon]] becomes another [[baryon]] and [[Conservation of Lepton Number|lepton conservation]] means that if a [[lepton]] comes into existence there must also be an [[antilepton]].
-| style="height:20px; width:200px; text-align:center;" |Finally the [[boson]] mediating the [[Fundamental Interactions|interaction]] is added as a [[wave]] between the two points of [[Fundamental Interactions|interaction]]. In this case a [[proton]] loses its [[Positive Charge|positive charge]] therefore it is carried away to the [[electron]] via the [[W-boson|W<sup>+</sup> boson]] transforming the [[electron]] into an [[Electron-neutrino|electron-neutrino]].
+| style="height:20px; width:200px; text-align:center;" |Finally the [[boson]] mediating the [[Fundamental Interactions|interaction]] is added as a [[wave]] between the two points of [[Fundamental Interactions|interaction]]. In this case a [[neutron]] loses a [[Negative Charge|negative charge]] therefore it is carried away to produce the [[electron]] via the [[W-boson|W<sup>-</sup> boson]] also producing an [[antielectron-neutrino]].
 |}

@@ Line 18: / Line 18: @@
 <math>p + e^- \rightarrow n + \bar\nu_e</math>
 | style="height:20px; width:200px; text-align:center;" |
-<math>p + e^- \rightarrow n + \bar\nu_e</math>
+<math>p + e^- \xrightarrow{W^+} n + \bar\nu_e</math>
 |-
 |[[File:FeynmanDiagramElectronCapturePt1.png|center|200px]]
@@ Line 36: / Line 36: @@
 <math>n \rightarrow p + \beta^- + \bar\nu_e</math>
 | style="height:20px; width:200px; text-align:center;" |
-<math>n \rightarrow p + \beta^- + \bar\nu_e</math>
+<math>n \xrightarrow{W^-} p + \beta^- + \bar\nu_e</math>
 |-
 |[[File:FeynmanDiagramNeutronDecayPt1.png|center|200px]]

@@ Line 30: / Line 30: @@
 {| class="wikitable"
-|+[[Electron Capture]]
+|+Neutron Decay
 | style="height:20px; width:200px; text-align:center;" |
 <math>n \rightarrow</math>

@@ Line 9: / Line 9: @@
 ===Constructing a Feynman Diagram===
-: '''Feynman Diagrams''' can be constructed from the equations representing a [[Subatomic Particle|particle]] [[Fundamental Interaction|interaction]].
+: '''Feynman Diagrams''' can be constructed from the equations representing a [[Subatomic Particle|particle]] [[Fundamental Interactions|interaction]].
 : The [[Subatomic Particle|particles]] at the start of the [[Nuclear Equation|equation]] are written at the bottom of the '''Feynman diagram''' while the [[product]]s are written at the top.
 {| class="wikitable"
@@ Line 23: / Line 23: @@
 |[[File:FeynmanDiagramElectronCapture.png|center|200px]]
 |-
-| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] prior to the [[Fundamental Interaction|interaction]] are drawn first at the bottom of the '''Feynman diagram'''.
+| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] prior to the [[Fundamental Interactions|interaction]] are drawn first at the bottom of the '''Feynman diagram'''.
-| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] after the [[Fundamental Interaction|interaction]] are drawn at the top of the '''Feynman diagram'''. It should be recognised that [[Conservation of Baryon Number|baryon conservation]] means a [[baryon]] becomes another [[baryon]] and [[Conservation of Lepton Number|lepton conservation]] means that a [[lepton]] is transformed from one type of [[lepton]] into another.
+| style="height:20px; width:200px; text-align:center;" |The [[Subatomic Particle|particles]] after the [[Fundamental Interactions|interaction]] are drawn at the top of the '''Feynman diagram'''. It should be recognised that [[Conservation of Baryon Number|baryon conservation]] means a [[baryon]] becomes another [[baryon]] and [[Conservation of Lepton Number|lepton conservation]] means that a [[lepton]] is transformed from one type of [[lepton]] into another.
-| style="height:20px; width:200px; text-align:center;" |Finally the [[boson]] mediating the [[Fundamental Interaction|interaction]] is added as a [[wave]] between the two points of [[Fundamental Interaction|interaction]]. In this case a [[proton]] loses its [[Positive Charge|positive charge]] therefore it is carried away to the [[electron]] via the [[W-boson|W<sup>+</sup> boson]] transforming the [[electron]] into an [[Electron Neutrino|electron neutrino]].
+| style="height:20px; width:200px; text-align:center;" |Finally the [[boson]] mediating the [[Fundamental Interactions|interaction]] is added as a [[wave]] between the two points of [[Fundamental Interactions|interaction]]. In this case a [[proton]] loses its [[Positive Charge|positive charge]] therefore it is carried away to the [[electron]] via the [[W-boson|W<sup>+</sup> boson]] transforming the [[electron]] into an [[Electron Neutrino|electron neutrino]].
 |}