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Particles and Fields


Eur. Phys. J. C 20, 147-159
DOI: 10.1007/s100520100639

Derivative expansion for the effective action of chiral gauge fermions. The normal parity component

L.L. Salcedo

Departamento de Física Moderna, Universidad de Granada, 18071 Granada, Spain

(Received: 31 January 2001 / Published online: 12 April 2001 -© Springer-Verlag 2001)

Abstract
Explicit exact formulas are presented, up to fourth order in a strict chiral covariant derivative expansion, for the normal parity component of the Euclidean effective action of even-dimensional Dirac fermions. The bosonic background fields considered are scalar, pseudo-scalar, vector and axial vector. No assumptions are made on the internal symmetry group and, in particular, the scalar and pseudo-scalar fields need not be on the chiral circle.



© Società Italiana di Fisica, Springer-Verlag 2001