Generalized Yang-Mills actions from Dirac operator determinants

Details Generalized Yang-Mills actions from Dirac operator determinants Generalized Yang-Mills actions from Dirac operator determinants

2001-04-08

arxiv.org/abs/math-ph/0104011v1

J.Math.Phys. 42 (2001) 5238-5256

Physics

Mathematical Physics

LaTex, 26 pages

Scientific paper

10.1063/1.1399297

We consider the quantum effective action of Dirac fermions on four dimensional flat Euclidean space coupled to external vector- and axial Yang-Mills fields, i.e., the logarithm of the (regularized) determinant of a Dirac operator on flat R^4 twisted by generalized Yang-Mills fields. According to physics folklore, the logarithmic divergent part of this effective action in the pure vector case is proportional to the Yang-Mills action. We present an explicit computation proving this fact, generalized to the chiral case. We use an efficient computation method for quantum effective actions which is based on calculation rules for pseudo-differential operators and which yields an expansion of the logarithm of Dirac operators in local and quasi-gauge invariant polynomials of decreasing scaling dimension.

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