Nonperturbative results for the mass dependence of the QED fermion determinant

Details Nonperturbative results for the mass dependence of the QED fermion determinant Nonperturbative results for the mass dependence of the QED fermion determinant

2010-05-26

arxiv.org/abs/1005.4849v1

Phys.Rev.D81(2010)107701

Physics

High Energy Physics

High Energy Physics - Theory

This is an extended version of the author's paper in Phys.Rev.D81(2010)107701

Scientific paper

The fermion determinant in four-dimensional quantum electrodynamics in the presence of O(2)XO(3) symmetric background gauge fields with a nonvanishing global chiral anomaly is considered. It is shown that the leading mass singularity of the determinant's nonperturbative part is fixed by the anomaly. It is also shown that for a large class of such fields there is at least one value of the fermion mass at which the determinant's nonperturbative part reduces to its noninteracting value.

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