Difference between revisions of "Antiparticle"
| Line 8: | Line 8: | ||
: When a [[Subatomic Particle|particle]] meets its '''antiparticle''' they [[Annihilation|annihilate]] one another producing a pair of [[photon]]s. | : 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]]. | : 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]]. | ||
| + | |||
| + | |||
| + | {| border="1" style="border-collapse:collapse" | ||
| + | | style="height:20px; width:100px; text-align:center;"|'''Antiparticle''' | ||
| + | | style="height:20px; width:100px; text-align:center;"|'''Composition''' | ||
| + | | style="height:20px; width:100px; text-align:center;"|[[Electrical Charge|'''Charge''']]/[[Elementary Charge|e]] | ||
| + | | style="height:20px; width:100px; text-align:center;"|'''[[Strangeness]]''' | ||
| + | | style="height:20px; width:100px; text-align:center;"|'''[[Conservation of Baryon Number|Baryon Number]]''' | ||
| + | | style="height:20px; width:100px; text-align:center;"|'''[[Conservation of Lepton Number|Lepton Number]]''' | ||
| + | |- | ||
| + | | style="height:20px; width:100px; text-align:center;"| | ||
| + | [[Antiproton]] | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>\bar{u}\bar{u}\bar{d}</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>Q=-1</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>S=0</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>B=-1</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>L=0</math> | ||
| + | |- | ||
| + | | style="height:20px; width:100px; text-align:center;"| | ||
| + | [[Antineutron]] | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>\bar{u}\bar{d}\bar{d}</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>Q=0</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>S=0</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>B=-1</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>L=0</math> | ||
| + | |- | ||
| + | | style="height:20px; width:100px; text-align:center;"| | ||
| + | [[Positron]] | ||
| + | | style="height:20px; width:100px; text-align:center;"|[[Fundamental Particle|Fundamental]] | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>Q=+1</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>S=0</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>B=0</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>L=-1</math> | ||
| + | |- | ||
| + | | style="height:20px; width:100px; text-align:center;"| | ||
| + | [[Anti Electron-Neutrino]] | ||
| + | | style="height:20px; width:100px; text-align:center;"|[[Fundamental Particle|Fundamental]] | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>Q=0</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>S=0</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>B=0</math> | ||
| + | | style="height:20px; width:100px; text-align:center;"|<math>L=-1</math> | ||
| + | |} | ||
Revision as of 09:45, 19 May 2024
Key Stage 5
Meaning
Antiparticles are small units of antimatter.
About Antiparticles
- Many particles of matter have antimatter counterparts which have the same mass but opposite electrical charge.
- During pair-production a particle and its antiparticle appear.
- When a particle meets its antiparticle they annihilate one another producing a pair of photons.
- Most antiparticles are given the name of their counterpart particle with the addition of the prefix anti. However, the antiparticle counterpart of the electron is known as the positron.
| Antiparticle | Composition | Charge/e | Strangeness | Baryon Number | Lepton Number |
| \(\bar{u}\bar{u}\bar{d}\) | \(Q=-1\) | \(S=0\) | \(B=-1\) | \(L=0\) | |
| \(\bar{u}\bar{d}\bar{d}\) | \(Q=0\) | \(S=0\) | \(B=-1\) | \(L=0\) | |
| Fundamental | \(Q=+1\) | \(S=0\) | \(B=0\) | \(L=-1\) | |
| Fundamental | \(Q=0\) | \(S=0\) | \(B=0\) | \(L=-1\) |