…Furthermore, in 1977, an experiment using the proton accelerator at Fermilab discovered a meson (upsilon Υ) even heavier than the J/ψ particle, suggesting the existence of a fifth type of quark. This quark is called the bottom quark or beauty quark, and is represented by the symbol b. The sixth type, the top quark (symbol t), was discovered in 1994. … *Some of the terminology that mentions "bottom quark" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…さらに77年,フェルミ国立加速器研究所の陽子加速器を使った実験で,J/ψ粒子よりさらに重い中間子(ウプシロンΥ)が発見され,5番目の種類のクォークの存在が要請された。このクォークはボトムクォークbottom quark,あるいはビューティークォークbeauty quarkと呼ばれ,記号bで表される。6番目のトップ・クォークtop quark(記号t)は1994年に発見されている。… ※「bottom quark」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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