Covariant Schwinger terms
C. Adam, C. Ekstrand, T. Sykora
TL;DR
This paper clarifies the correct form of the covariant Schwinger term in quantum field theory by analyzing existing computations and emphasizing the significance of sign differences.
Contribution
It provides a detailed review and correction of the covariant Schwinger term, resolving discrepancies caused by sign differences in prior literature.
Findings
Identifies the correct sign of the covariant Schwinger term
Clarifies the impact of sign differences on theoretical results
Reviews existing quantum field theoretical computations
Abstract
There exist two versions of the covariant Schwinger term in the literature. They only differ by a sign. However, we shall show that this is an essential difference. We shall carefully (taking all signs into account) review the existing quantum field theoretical computations for the covariant Schwinger term in order to determine the correct expression.
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