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- W2952206316 abstract "We present a simple derivation of the one-loop trace anomaly in spinor QED through dispersion relations, avoiding completely any ultraviolet regularization. The anomaly can be expressed as a convergent sum rule for the imaginary part of a relevant formfactor. In the massless limit, the imaginary part produces a delta-function singularity at zero external momentum squared. Such a treatment reveals an infrared face of the trace anomaly, in striking similarity with the well-known case of the axial anomaly." @default.
- W2952206316 created "2019-06-27" @default.
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- W2952206316 date "1997-01-28" @default.
- W2952206316 modified "2023-09-27" @default.
- W2952206316 title "Dispersive derivation of the trace anomaly" @default.
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