Fermion Self-Energy during Inflation

Details Fermion Self-Energy during Inflation Fermion Self-Energy during Inflation

2003-07-13

arxiv.org/abs/astro-ph/0307269v1

Astronomy and Astrophysics

Astrophysics

12 pages, LaTeX 2epsilon, 2 figures, Proceedings of XII International Conference on Selected Problems of Modern Physics, Dubna

Scientific paper

I report on work done with Tomislav Prokopec (Heidelberg, CERN). We computed the one loop self-energy of a massless fermion during inflation. When the fermion is free it experiences only a small amount of inflationary particle production owing to the conformal invariance of its classical action. However, when the fermion is Yukawa coupled to a massless, minimally coupled scalar, there is copious production of fermions. In a more complicated model this effect might generate baryon asymmetry during inflation.

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