Derivative expansion for the effective action of chiral gauge
نویسنده
چکیده
Derivative expansion for the effective action of chiral gauge fermions. The normal parity component. Abstract Explicit exact formulas are presented, up to fourth order in a strict chi-ral 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.
منابع مشابه
Derivative expansion for the effective action of chiral gauge fermions. The abnormal parity component
Explicit exact formulas are presented, for the leading order term in a chiral covariant derivative expansion, for the abnormal parity component of the effective action of twoand four-dimensional Dirac fermions in presence of scalar, pseudo-scalar, vector and axial vector background fields. The formulas hold for completely general internal symmetry groups and general configurations. In particula...
متن کاملDerivative expansion for the effective action of chiral gauge fermions. The normal parity component
Explicit exact formulas are presented, up to fourth order in a 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-sca...
متن کاملEffective CP violation in the Standard Model
We study the strength of effective CP violation originating from the CKM matrix in the effective action obtained by integrating out the fermions in the Standard Model. Using results obtained by Salcedo for the effective action in a general chiral gauge model, we find that there are no CKM CP-violating terms to fourth order in a gaugecovariant derivative expansion that is non-perturbative in the...
متن کاملDerivative Expansion of the Effective Action for Massless Scalar Electrodynamics in Arbitrary Gauge
It is shown how operator regularization can be used to obtain an expansion of the effective action in powers of derivatives of the background field. This is applied to massless scalar electrodynamics to find the one-loop corrections to the kinetic terms associated with both the scalar and vector fields in arbitrary gauge. This allows us to examine the radiatively induced masses arising in this ...
متن کاملThe Higher Derivative Expansion of the Effective Action by the String Inspired Method. Part II
We apply the string-inspired worldline formalism to the calculation of the higher derivative expansion of one-loop effective actions in non-Abelian gauge theory. For this purpose, we have completely computerized the method, using the symbolic manipulation programs FORM, PERL and M. Explicit results are given to sixth order in the inverse mass expansion, reduced to a minimal basis of invariants ...
متن کامل