Dispersive derivation of the trace anomaly

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dc.creatorHorejsi, J.
dc.creatorSchnabl, M.
dc.date1997-01-28
dc.date1997-01-31
dc.date.accessioned2026-07-07T09:03:28Z
dc.date.available2026-07-07T09:03:28Z
dc.descriptionWe 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.
dc.description12 pages LATEX, minor changes in references
dc.identifierhttps://arxiv.org/abs/hep-ph/9701397
dc.identifierhttp://arxiv.org/abs/hep-ph/9701397
dc.identifierZ.Phys. C76 (1997) 561-565
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/149019
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleDispersive derivation of the trace anomaly
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