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Background field method, Batalin-Vilkovisky formalism and parametric completeness of renormalization

Damiano Anselmi*

  • Dipartimento di Fisica “Enrico Fermi,” Università di Pisa, and INFN, Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy

  • *damiano.anselmi@df.unipi.it

Phys. Rev. D 89, 045004 – Published 6 February, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.045004

Abstract

We investigate the background field method with the Batalin-Vilkovisky formalism, to generalize known results, study the parametric completeness of general gauge theories and achieve a better understanding of several properties. In particular, we study renormalization and gauge dependence to all orders. Switching between the background field approach and the usual approach by means of canonical transformations, we prove parametric completeness without making use of cohomological theorems; namely we show that if the starting classical action is sufficiently general all divergences can be subtracted by means of parameter redefinitions and canonical transformations. Our approach applies to renormalizable and nonrenormalizable theories that are manifestly free of gauge anomalies and satisfy the following assumptions: the gauge algebra is irreducible and closes off shell, the gauge transformations are linear functions of the fields, and closure is field independent. Yang-Mills theories and quantum gravity in arbitrary dimensions are included, as well as effective and higher-derivative versions of them, but several other theories, such as supergravity, are left out.

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