Origin of soft limits from nonlinear supersymmetry in Volkov-Akulov theory

Origin of soft limits from nonlinear supersymmetry in Volkov-Akulov theory
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沃尔科夫-阿库洛夫理论中非线性超对称性软极限的起源

DOI：
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发表时间：
2016
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影响因子：
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通讯作者：
Divyanshu Murli
Divyanshu Murli
中科院分区：
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文献类型：
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作者：
R. Kallosh;A. Karlsson;Divyanshu Murli

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我们应用背景场技术，最近开发的一般类的非线性对称性，在树的水平上，自发破缺N=1$$ \mathcal{N}=1 $$超对称性的Brachov-Akulov理论。我们发现，背景场按自由场展开到最低阶再现了非线性超对称变换规则。背景场的双软极限与新的一般恒等式一致，由非线性对称的代数定义。
A bstractWe apply the background field technique, recently developed for a general class of nonlinear symmetries, at tree level, to the Volkov-Akulov theory with spontaneously broken N=1$$ \mathcal{N}=1 $$ supersymmetry. We find that the background field expansion in terms of the free fields to the lowest order reproduces the nonlinear supersymmetry transformation rules. The double soft limit of the background field is, in agreement with the new general identities, defined by the algebra of the nonlinear symmetries.