Fermionic alpha-vacua
高能物理 - 理论
2009-11-10 v1
摘要
A spin one-half 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.
引用
@article{arxiv.hep-th/0410229,
title = {Fermionic alpha-vacua},
author = {Hael Collins},
journal= {arXiv preprint arXiv:hep-th/0410229},
year = {2009}
}
备注
13 pages, 3 eps figures, uses RevTeX