antiparticle

English

Alternative forms

• anti-particle

Etymology

anti- +‎ particle

Pronunciation

• IPA^(key): /ˈæntiˌpɑɹtɪkəl/

Noun

antiparticle (plural antiparticles)

1. (physics) A subatomic particle corresponding to another particle with the same mass, spin and mean lifetime but with charge, parity, strangeness and other quantum numbers flipped in sign; a particle that has a reversed world line to another.
   • 1988, Stephen Hawking, A Brief History of Time: From the Big Bang to Black Holes, page 75:

     There could be whole antiworlds and antipeople made out of antiparticles. However, if you meet your antiself, don't shake hands!

Usage notes

• The symbol for an antiparticle is the symbol for the normal particle plus "bar" (e.g. pbar) or with a bar above the symbol.

Translations

a subatomic particle

• Armenian: հակամասնիկ (hakamasnik)
• Catalan: antipartícula (ca) f
• Czech: antičástice f
• Esperanto: antipartiklo, kontraŭpartiklo
• Finnish: antihiukkanen (fi)
• French: antiparticule (fr) f
• German: Antiteilchen (de) n
• Hungarian: antirészecske (hu)
• Icelandic: andeind (is) f
• Ido: antipartikulo (io)
• Italian: antiparticella (it) f
• Japanese: 反粒子 (はんりゅうし, hanryūshi)
• Norwegian:

  Bokmål: antipartikkel m

  Nynorsk: antipartikkel m

• Polish: antycząstka (pl) f
• Portuguese: antipartícula (pt) f
• Romanian: antiparticulă (ro)
• Russian: античасти́ца (ru) f (antičastíca)
• Slovak: antičastica f
• Spanish: antipartícula (es) f
• Swedish: antipartikel (sv) c

See also

• self-conjugate