Quantum gravitational effects on massive fermions during inflation
Author:
- 20 November 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 86 (10)
Abstract
We compute the one loop graviton contribution to the self-energy of a very light fermion on a locally de Sitter background. This result can be used to study the effect that a small mass has on the propagation of fermions through the sea of infrared gravitons generated by inflation. We employ dimensional regularization and obtain a fully renormalized result by absorbing all divergences with Bogliubov-Parasuik-Hepp-Zimmermann counterterms. An interesting technical aspect of this computation is the need for two noninvariant counterterms owing to the breaking of de Sitter invariance by our gauge condition.Keywords
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