Eur. Phys. J. C 20, 161-184
DOI: 10.1007/s100520100641
Derivative expansion for the effective action of chiral gauge fermions. The abnormal 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, for the leading order term in a
strict chiral covariant derivative expansion, for the abnormal parity
component of the effective action of two- and four-dimensional Dirac
fermions in the presence of scalar, pseudo-scalar, vector and axial vector
background fields. The formulas hold for completely general internal
symmetry groups and general configurations. In particular, the scalar
and pseudo-scalar fields need not be on the chiral circle.
© Società Italiana di Fisica, Springer-Verlag 2001