Geometric Reheating after Inflation

Details Geometric Reheating after Inflation Geometric Reheating after Inflation

1997-09-22

arxiv.org/abs/hep-ph/9709417v3

Phys.Rev.D58:021302,1998; Erratum-ibid.D60:049902,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, Revtex, 2 eps figures. Version to appear in Phys. Rev. D (Rapid Communication, July 15)

Scientific paper

10.1103/PhysRevD.58.021302

Inflationary reheating via resonant production of non-minimally coupled scalar particles with only gravitational coupling is shown to be extremely strong, exhibiting a negative coupling instability for $\xi < 0$ and a wide resonance decay for $\xi \gg 1$. Since non-minimal fields are generic after renormalisation in curved spacetime, this offers a new paradigm in reheating - one which naturally allows for efficient production of the massive bosons needed for GUT baryogenesis. We also show that both vector and tensor fields are produced resonantly during reheating, extending the previously known correspondences between bosonic fields of different spins during preheating.

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