Nonquadratic gauge fixing and global gauge invariance in the effective action
Journal Article
·
· Physical Review. D, Particles Fields
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, Sao Paulo 05315-970 (Brazil)
- Department of Applied Mathematics, University of Western Ontario, London, Ontario N6A 5B7 (Canada)
The possibility of having a gauge fixing term in the effective Lagrangian that is not a quadratic expression has been explored in spin-two theories so as to have a propagator that is both traceless and transverse. We first show how this same approach can be used in spontaneously broken gauge theories as an alternate to the 't Hooft gauge fixing which avoids terms quadratic in the scalar fields. This 'nonquadratic' gauge fixing in the effective action results in two complex fermionic and one real bosonic ghost field. A global gauge invariance involving a fermionic gauge parameter, analogous to the usual Becchi-Rouet-Stora-Tyutin invariance, is present in this effective action.
- OSTI ID:
- 21308383
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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