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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 Wess–Zumino model ： ウィキペディア英語版 Wess–Zumino model In theoretical physics, the Wess–Zumino model has become the first known example of an interacting four-dimensional quantum field theory with supersymmetry. In 1974, Julius Wess and Bruno Zumino studied, using modern terminology, dynamics of a single chiral superfield (composed of a complex scalar and a spinor fermion) whose cubic superpotential leads to a renormalizable theory. The Lagrangian of the ''free'' massless Wess–Zumino model in four-dimensional spacetime with flat metric $\backslash mathrm(-1,1,1,1)$ is ::$$ \mathcal=-\frac(\partial S)^-\frac(\partial P)^-\frac\bar \partial\!\!\!/ \psi with $S$ a scalar field, $P$ a pseudoscalar field and $\backslash psi$ a Majorana spinor field. The action is invariant under the transformations generated by the superalgebra. The infinitesimal form of these transformations is: ::$\backslash delta\_\; S=\backslash bar\; \backslash psi$ ::$\backslash delta\_\; P\; =\backslash bar\; \backslash gamma\_\; \backslash psi$ ::$\backslash delta\_\; \backslash psi\; =\backslash partial\backslash !\backslash !\backslash !/\; (S+P\backslash gamma\_)\backslash epsilon$ where $\backslash epsilon$ is a Majorana spinor-valued transformation parameter and $\backslash gamma\_$ is the chirality operator. Invariance under a (modified) set of supersymmetry transformations remains if one adds mass terms for the fields, provided the masses are equal. It is also possible to add interaction terms under some algebraic conditions on the coupling constants, resulting from the fact that the interactions come from superpotential for the chiral superfield containing the fields $S$, $P$ and $\backslash psi$. ==References== * * 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「Wess–Zumino 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.