Abstract
The momentum space cutoff we have been using is the most intuitive form of regularization, but it is not the most efficient one. For a scalar field theory which does not have any gauge symmetries to preserve it is fine. But in a gauge theory, the momentum space cutoff is bad news.
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Cline, J.M. (2020). Other Regulators. In: Advanced Concepts in Quantum Field Theory. SpringerBriefs in Physics. Springer, Cham. https://doi.org/10.1007/978-3-030-56168-0_7
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DOI: https://doi.org/10.1007/978-3-030-56168-0_7
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