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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 N = 4 supersymmetric Yang–Mills theory ： ウィキペディア英語版 N = 4 supersymmetric Yang–Mills theory ''N'' = 4 supersymmetric Yang–Mills theory is a mathematical and physical model created to study particles through a simple system, similar to string theory, with conformal symmetry. It is a simplified toy theory based on Yang–Mills theory that does not describe the real world, but is useful because it can act as a proving ground for approaches for attacking problems in more complex theories.〔(【引用サイトリンク】Ars Technica">title=Earning a PhD by studying a theory that we know is wrong )〕 It describes a universe containing boson fields and fermion fields which are related by 4 supersymmetries (this means that swapping boson, fermion and scalar fields in a certain way leaves the predictions of the theory invariant). It is one of the simplest (because it has no free parameters except for the gauge group) and one of the few finite quantum field theories in 4 dimensions. It can be thought of as the most symmetric field theory that does not involve gravity. ==Lagrangian== The Lagrangian for the theory is: : $L\; =\; \backslash operatorname\; \backslash left\backslash F\_F^+\backslash fracF\_\backslash bar^-\; i\; \backslash lambda^a\backslash sigma^\backslash mu\; D\_\backslash mu\; \backslash lambda\_a\; -D\_\backslash mu\; X^i\; D^\backslash mu\; X^i$ +g C^_i \lambda_a() +C_\lambda^a()+\frac()^2 \right\} where $$ F^k_ = \partial_\mu A^k_\nu-\partial_\nu A^k_\mu+g f^A^l_\mu A^m_\nu and the indices ''i'',''j'' = 1, ..., 6 and the indices ''a'', ''b'' = 1, ..., 4. And f are the group constants of the particular gauge group. 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「N = 4 supersymmetric Yang–Mills theory」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.