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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 Pion decay constant ： ウィキペディア英語版 Pion decay constant In particle physics, the pion decay constant is the square root of the coefficient in front of the kinetic term for the pion in the low-energy effective action. It is dimensionally an energy scale and it determines the strength of the chiral symmetry breaking. The values are: :$f\_$ :$f\_$ Beware: There are several conventions which differ by factors of $\backslash scriptstyle\; \backslash sqrt$. The textbook by Weinberg uses the value 184 MeV. The textbook by Peskin and Schroeder uses the value 93 MeV. == References == # (Particle Data Group: W.-M. Yao ''et al.'', J. Phys. G 33, 1 (2006). ) # # (Particle Data Group: Decay constants of charged pseudoscalar mesons ) 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「Pion decay constant」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.