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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク topness ： ウィキペディア英語版 topness Topness (also called truth), a flavour quantum number, represents the difference between the number of top quarks (t) and number of top antiquarks () that are present in a particle: :$T\; =\; n\_\backslash text\; -\; n\_\backslash bar\{\backslash text\{t\}\}$ By convention, top quarks have a topness of +1 and top antiquarks have a topness of −1.The term "topness" is rarely used; most physicists simply refer to "the number of top quarks" and "the number of top antiquarks". ==Conservation== Like all flavour quantum numbers, topness is preserved under strong and electromagnetic interactions, but not under weak interaction. However the top quark is extremely unstable, with a half-life under 10−23 s, which is the required time for the strong interaction to take place. For that reason the top quark does not hadronizationime it can interact strongly it has already decayed to another flavour of quark (usually to a bottom quark). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「topness」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.