Production of Massless Fermions during Inflation

Details Production of Massless Fermions during Inflation Production of Massless Fermions during Inflation

2003-09-22

arxiv.org/abs/astro-ph/0309593v2

JHEP 0310:059,2003

Astronomy and Astrophysics

Astrophysics

17 pages, LaTeX 2e, 1 figure. The first 15 pages gives the text of version 1, which matches the published version. The erratum

Scientific paper

10.1088/1126-6708/2003/10/059

We compute the one loop self energy, in a locally de Sitter background, for a massless fermion which is Yukawa-coupled to a massless, minimally coupled scalar. We then solve the modified Dirac equation resulting from inclusion of the self energy. We find faster-than-exponential growth in the fermion wave function, consistent with the production of fermions through a process in which a scalar and a fermion-anti-fermion pair are ripped out of the vacuum by inflation.

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