Perturbative effective action for the photon in noncommutative QED${}_2$ and exactness of the Schwinger mass

M. Ghasemkhani, A. A. Varshovi, R. Bufalo

In this paper, we discuss the noncommutative QED${}_2$ in the S-matrix framework. We are interested in perturbatively proving that the exact Schwinger mass ${\mu }^2=\frac{e^2}{\pi }$ does not…