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Difference between revisions of "Antiparticle"

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==Key Stage 5==
 
==Key Stage 5==
 
===Meaning===
 
===Meaning===
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'''Antiparticles''' are small units of [[anti-matter]].
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'''Antiparticles''' are small units of [[antimatter]].
  
 
===About Antiparticles===
 
===About Antiparticles===
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: Many [[Subatomic Particle|particle]]s of [[matter]] have [[antimatter]] counterparts which have the same [[mass]] but opposite [[Electrical Charge|electrical charge]].
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*Many [[Subatomic Particle|particle]]s of [[matter]] have [[antimatter]] counterparts which have the same [[mass]] but opposite [[Electrical Charge|electrical charge]].
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: During [[Pair-Production|pair-production]] a [[Subatomic Particle|particle]] and its '''antiparticle''' appear.
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*[[Antiparticle]]s are generally denoted by a bar over the top of the symbol used for their [[matter]] counterpart.
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: When a [[Subatomic Particle|particle]] meets its '''antiparticle''' they [[Annihilation|annihilate]] one another producing a pair of [[photon]]s.
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*During [[Pair-Production|pair-production]] a [[Subatomic Particle|particle]] and its '''antiparticle''' appear.
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: Most '''antiparticles''' are given the name of their counterpart [[Subatomic Particle|particle]] with the addition of the prefix '''anti'''. However, the '''antiparticle''' counterpart of the [[electron]] is known as the [[positron]].
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*When a [[Subatomic Particle|particle]] meets its '''antiparticle''' they [[Annihilation|annihilate]] one another producing a pair of [[photon]]s.
 +
*Most '''antiparticles''' are given the name of their counterpart [[Subatomic Particle|particle]] with the addition of the prefix '''anti'''. However, the '''antiparticle''' counterpart of the [[electron]] is known as the [[positron]].
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*The existence of [[antiparticle]]s is a fundamental concept in [[Particle Physics|particle physics]].
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*[[Antiparticle]]s are produced in high-energy collisions and natural radioactive [[Decay (Physics)|decay]].
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*[[Antiparticle]]s can be trapped and studied using magnetic fields in devices like Penning traps.
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*Understanding [[antiparticle]]s helps in exploring the symmetry and interactions of fundamental forces.
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*The discovery of [[antiparticle]]s confirmed the predictions of [[Quantum Field Theory|quantum field theory]].
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{| border="1" style="border-collapse:collapse"
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| style="height:20px; width:100px; text-align:center;"|'''Antiparticle'''
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| style="height:20px; width:100px; text-align:center;"|'''Symbol'''
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| style="height:20px; width:100px; text-align:center;"|'''Composition'''
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| style="height:20px; width:100px; text-align:center;"|[[Electrical Charge|'''Charge''']]/[[Elementary Charge|e]]
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| style="height:20px; width:100px; text-align:center;"|'''[[Strangeness]]'''
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| style="height:20px; width:100px; text-align:center;"|'''[[Conservation of Baryon Number|Baryon Number]]'''
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| style="height:20px; width:100px; text-align:center;"|'''[[Conservation of Lepton Number|Lepton Number]]'''
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|-
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| style="height:20px; width:100px; text-align:center;"|
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[[Positron]]
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| style="height:20px; width:100px; text-align:center;"|<math>\bar{e}</math> or <math>\beta^+</math>
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| style="height:20px; width:100px; text-align:center;"|[[Fundamental Particle|Fundamental]]
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| style="height:20px; width:100px; text-align:center;"|<math>Q=+1</math>
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| style="height:20px; width:100px; text-align:center;"|<math>S=0</math>
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| style="height:20px; width:100px; text-align:center;"|<math>B=0</math>
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| style="height:20px; width:100px; text-align:center;"|<math>L=-1</math>
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|-
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| style="height:20px; width:100px; text-align:center;"|
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[[Anti Electron-Neutrino]]
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| style="height:20px; width:100px; text-align:center;"|<math>\bar{\nu_e}</math>
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| style="height:20px; width:100px; text-align:center;"|[[Fundamental Particle|Fundamental]]
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| style="height:20px; width:100px; text-align:center;"|<math>Q=0</math>
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| style="height:20px; width:100px; text-align:center;"|<math>S=0</math>
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| style="height:20px; width:100px; text-align:center;"|<math>B=0</math>
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| style="height:20px; width:100px; text-align:center;"|<math>L=-1</math>
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|-
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| style="height:20px; width:120px; text-align:center;"|
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[[Antiup-quark]]
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| style="height:20px; width:120px; text-align:center;"|<math>\bar{u}</math>
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| style="height:20px; width:100px; text-align:center;"|[[Fundamental Particle|Fundamental]]?
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| style="height:20px; width:120px; text-align:center;"|<math>Q=-\frac{2}{3}</math>
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| style="height:20px; width:120px; text-align:center;"|<math>S=0</math>
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| style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math>
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| style="height:20px; width:120px; text-align:center;"|<math>L=0</math>
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|-
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| style="height:20px; width:120px; text-align:center;"|
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[[Antidown-quark]]
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| style="height:20px; width:120px; text-align:center;"|<math>\bar{d}</math>
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| style="height:20px; width:100px; text-align:center;"|[[Fundamental Particle|Fundamental]]?
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| style="height:20px; width:120px; text-align:center;"|<math>Q=+\frac{1}{3}</math>
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| style="height:20px; width:120px; text-align:center;"|<math>S=0</math>
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| style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math>
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| style="height:20px; width:120px; text-align:center;"|<math>L=0</math>
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|-
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| style="height:20px; width:120px; text-align:center;"|
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[[Antistrange-quark]]
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| style="height:20px; width:120px; text-align:center;"|<math>\bar{s}</math>
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| style="height:20px; width:100px; text-align:center;"|[[Fundamental Particle|Fundamental]]?
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| style="height:20px; width:120px; text-align:center;"|<math>Q=+\frac{1}{3}</math>
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| style="height:20px; width:120px; text-align:center;"|<math>S=+1</math>
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| style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math>
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| style="height:20px; width:120px; text-align:center;"|<math>L=0</math>
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|-
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| style="height:20px; width:100px; text-align:center;"|
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[[Antiproton]]
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| style="height:20px; width:100px; text-align:center;"|<math>\bar{p}</math>
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| style="height:20px; width:100px; text-align:center;"|<math>\bar{u}\bar{u}\bar{d}</math>
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| style="height:20px; width:100px; text-align:center;"|<math>Q=-1</math>
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| style="height:20px; width:100px; text-align:center;"|<math>S=0</math>
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| style="height:20px; width:100px; text-align:center;"|<math>B=-1</math>
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| style="height:20px; width:100px; text-align:center;"|<math>L=0</math>
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|-
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| style="height:20px; width:100px; text-align:center;"|
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[[Antineutron]]
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| style="height:20px; width:100px; text-align:center;"|<math>\bar{n}</math>
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| style="height:20px; width:100px; text-align:center;"|<math>\bar{u}\bar{d}\bar{d}</math>
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| style="height:20px; width:100px; text-align:center;"|<math>Q=0</math>
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| style="height:20px; width:100px; text-align:center;"|<math>S=0</math>
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| style="height:20px; width:100px; text-align:center;"|<math>B=-1</math>
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| style="height:20px; width:100px; text-align:center;"|<math>L=0</math>
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|}

Latest revision as of 19:22, 19 May 2024

Key Stage 5

Meaning

Antiparticles are small units of antimatter.

About Antiparticles


Antiparticle Symbol Composition Charge/e Strangeness Baryon Number Lepton Number

Positron

\(\bar{e}\) or \(\beta^+\) Fundamental \(Q=+1\) \(S=0\) \(B=0\) \(L=-1\)

Anti Electron-Neutrino

\(\bar{\nu_e}\) Fundamental \(Q=0\) \(S=0\) \(B=0\) \(L=-1\)

Antiup-quark

\(\bar{u}\) Fundamental? \(Q=-\frac{2}{3}\) \(S=0\) \(B=-\frac{1}{3}\) \(L=0\)

Antidown-quark

\(\bar{d}\) Fundamental? \(Q=+\frac{1}{3}\) \(S=0\) \(B=-\frac{1}{3}\) \(L=0\)

Antistrange-quark

\(\bar{s}\) Fundamental? \(Q=+\frac{1}{3}\) \(S=+1\) \(B=-\frac{1}{3}\) \(L=0\)

Antiproton

\(\bar{p}\) \(\bar{u}\bar{u}\bar{d}\) \(Q=-1\) \(S=0\) \(B=-1\) \(L=0\)

Antineutron

\(\bar{n}\) \(\bar{u}\bar{d}\bar{d}\) \(Q=0\) \(S=0\) \(B=-1\) \(L=0\)
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