Electrodynamics in a Background Chiral Field
classification
✦ hep-th
hep-ph
keywords
fieldchiralactionbackgroundspinoranalogousaxialconsider
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We consider the one loop effective action in four dimensional Euclidean space for a background chiral field coupled to a spinor field. It proves possible to find an exact expression for this action if the mass $m$ of the spinor vanishes. If $m$ does not vanish, one can make a perturbative expansion in powers of the axial field that contributes to the chiral field, while treating the contribution of the vector field exactly when it is a constant. The analogous problem in two dimensions is also discussed.
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