Fermionic {alpha}-vacua
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003 (United States)
A spin (1/2) particle propagating in a de Sitter background has a one parameter family of states which transform covariantly under the isometry group of the background. These states are the fermionic analogues of the {alpha}-vacua for a scalar field. We shall show how using a point-source propagator for a fermion in an {alpha}-state produces divergent perturbative corrections. These corrections cannot be used to cancel similar divergences arising from scalar fields in bosonic {alpha}-vacua since they have an incompatible dependence on the external momenta. The theory can be regularized by modifying the propagator to include an antipodal source.
- OSTI ID:
- 20705820
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 2 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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