出典:Wiktionary
出典:『Wiktionary』 (2026/03/05 20:39 UTC 版)
preon (plural preons)
From Proto-Germanic *preunaz (“knitting needle, pin”)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/07 18:56 UTC 版)
In particle physics, preons are postulated "point-like" particles, conceived to be subcomponents of quarks and leptons. The word was coined by Jogesh Pati and Abdus Salam in 1974. Interest in preon models peaked in the 1980s but has slowed as the Standard Model of particle physics continues to describe the physics mostly successfully, and no experimental evidence for lepton and quark compositeness has been found.