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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 Thirring–Wess model ： ウィキペディア英語版 Thirring–Wess model The Thirring–Wess model or Vector Meson model is an exactly solvable quantum field theory describing the interaction of a Dirac field with a vector field in dimension two. ==Definition== The Lagrangian density is made of three terms: the free vector field $A^\backslash mu$ is described by :$$ + (A^\mu)^2 for $F^=\; \backslash partial^\backslash mu\; A^\backslash nu\; -\; \backslash partial^\backslash nu\; A^\backslash mu$ and the boson mass $\backslash mu$ must be strictly positive; the free fermion field $\backslash psi$ is described by :$$ \overline(i\partial\!\!\!/-m)\psi where the fermion mass $m$ can be positive or zero. And the interaction term is :$$ qA^\mu(\bar\psi\gamma^\mu\psi) Although not required to define the massive vector field, there can be also a gauge-fixing term :$$ (\partial^\mu A^\mu)^2 for $\backslash alpha\; \backslash ge\; 0$ There is a remarkable difference between the case $\backslash alpha\; >\; 0$ and the case $\backslash alpha\; =\; 0$: the latter requires a field renormalization to absorb divergences of the two point correlation. 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「Thirring–Wess model」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.