paper

Electron Mass Anomalous Dimension at O(1/N^2_f) in Quantum Electrodynamics

arXiv:hep-th/9309092 · doi:10.1016/0370-2693(93)91017-H

Abstract

The critical exponent corresponding to the renormalization of the composite operator is computed in quantum electrodynamics at $O(1/\Nf^2)$ in arbitrary dimensions and covariant gauge at the non-trivial zero of the -function in the large $\Nf$ expansion and the exponent corresponding to the anomalous dimension of the electron mass which is a gauge independent object is deduced. Expanding in powers of we check it is consistent with the known three loop perturbative structure and determine the subsequent coefficients in the coupling constant

12 pages (latex), 1 figure (available from author on request), LTH-316

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