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2 votes

Reference request: scalar $O(N)$ gauge theory

If you’re interested in the large N version of these models, then a good reference is https://arxiv.org/abs/hep-th/9810198
1 vote
Accepted

Motivation for pure Yang-Mills Lagrangian

Toffomat's answer is a great answer. Let me try to add a little bit more physical motivation for what it means to "decouple the ghosts." SUMMARY: The requirement of gauge invariance comes ...
Luke Pritchett's user avatar

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