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. SalcedoDepartamento 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
