翻訳と辞書 Words near each other ・ Gelinözü, Mudurnu ・ Gelioya ・ Gelisol ・ Gelitin ・ Gelius ・ Geliy Korzhev ・ Geliyan, Kurdistan ・ Geliyoo ・ Gelişim Koleji S.K. ・ Gelkenes ・ Gelkuyeh ・ Gell ・ Gell baronets ・ Gell-Mann and Low theorem ・ Gell-Mann matrices ・ Gell-Mann–Nishijima formula ・ Gell-Mann–Okubo mass formula ・ Gella Vandecaveye ・ Gellainville ・ Gellan gum ・ Gellan lyase ・ Gellan tetrasaccharide unsaturated glucuronyl hydrolase ・ Gellar ・ Gellar-e Mohammad Hasan ・ Gellar-e Mohammad Taqi ・ Gelle Hills United ・ Gellen ・ Gellenoncourt ・ Gellenstrom ・ Geller Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Gell-Mann–Nishijima formula ： ウィキペディア英語版 Gell-Mann–Nishijima formula The Gell-Mann–Nishijima formula (sometimes known as the NNG formula) relates the baryon number ''B'', the strangeness ''S'', the isospin ''I3'' of hadrons to the charge ''Q''. It was originally given by Kazuhiko Nishijima and Tadao Nakano in 1953,〔 〕 and led to the proposal of strangeness as a concept, which Nishijima originally called "eta-charge" after the eta meson.〔 〕 Murray Gell-Mann proposed the formula independently in 1956.〔 〕 The modern version of the formula relates all flavour quantum numbers (isospin up and down, strangeness, charm, bottomness, and topness) with the baryon number and the electric charge. ==Formula== The original form of the Gell-Mann–Nishijima formula is: :$Q\; =\; I\_3\; +\; \backslash frac\; (B+S).\backslash$ This equation was originally based on empirical experiments. It is now understood as a result of the quark model. In particular, the electric charge ''Q'' of a particle is related to its isospin ''I3'' and its hypercharge ''Y'' via the relation: :$Q\; =\; I\_3\; +\; \backslash frac\; Y.\backslash$ Since the discovery of charm, top, and bottom quark flavors, this formula has been generalized. It now takes the form: :$Q\; =\; I\_3\; +\; \backslash frac\; (B+S+C+B^\backslash prime+T)$ where ''Q'' is the charge, ''I''3 the 3rd-component of the isospin, ''B'' the baryon number, and ''S'', ''C'', ''B′'', ''T'' are the strangeness, charm, bottomness and topness numbers. Expressed in terms of quark content, these would become: : ■ウィキペディアで「Gell-Mann–Nishijima formula」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.