On the proper treatment of massless fields in Euclidean de Sitter space

Details On the proper treatment of massless fields in Euclidean de Sitter space On the proper treatment of massless fields in Euclidean de Sitter space

2010-08-06

arxiv.org/abs/1008.1271v1

Phys.Rev.D82:123522,2010

Physics

High Energy Physics

High Energy Physics - Theory

12 pages

Scientific paper

10.1103/PhysRevD.82.123522

We analyze infrared divergences arising in calculations involving light and massless fields in de Sitter space. We show that these arise from an incorrect treatment of the constant mode of the field, and show that a correct quantization leads to a well-defined and calculable perturbation expansion. We illustrate this by computing the first nontrivial loop correction in a theory of a massless scalar field with a quartic interaction.

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