paper

Non-renormalizability of θ-expanded noncommutative QED

arXiv:hep-th/0112248 · doi:10.1088/1126-6708/2002/03/024

Abstract

Computing all divergent one-loop Green's functions of θ-expanded noncommutative quantum electrodynamics up to first order in θ, we show that this model is not renormalizable. The reason is a divergence in the electron four-point function which cannot be removed by field redefinitions. Ignoring this problem, we find however clear hints for new symmetries in massless θ-expanded noncommutative QED: Four additional divergences which would be compatible with gauge and Lorentz symmetries and which are not reachable by field redefinitions are absent.

30 pages, LaTeX, JHEP.cls, uses the feynmf package to draw 96 Feynman graphs. v2: minor corrections, references added, adapted to JHEP style

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