Energy-momentum-tensor trace anomaly in spin-1/2 quantum electrodynamics

Abstract

We relate the energy-momentum-tensor trace anomaly in spin-1/2 quantum electrodynamics to the functions $\ensuremath{\beta}(\ensuremath{\alpha})$, $\ensuremath{\delta}(\ensuremath{\alpha})$ defined through the Callan-Symanzik equations, and prove finiteness of ${\ensuremath{\theta}}_{\ensuremath{\mu}\ensuremath{\nu}}$ when the anomaly is taken into account.