noun
K-meson; kaon
Technical term in particle physics; refers to a meson containing a strange quark.
Ｋ粒子はストレンジクォークを含む中間子の一種です。
The K-meson is a type of meson that contains a strange quark.
この実験ではＫ粒子の崩壊を観測した。
In this experiment, we observed the decay of kaons.
Meson in general; Ｋ粒子 is a specific type of meson (kaon).
Pion (π meson); another type of meson, lighter than the kaon.
From English 'K-meson' or 'kaon', where 'K' stands for 'K-meson' and 粒子 means 'particle'. The term was coined in particle physics.