Cosmological consequences of particle creation during inflation

Details Cosmological consequences of particle creation during inflation Cosmological consequences of particle creation during inflation

1996-09-23

arxiv.org/abs/hep-ph/9609441v1

Phys.Rev. D57 (1998) 7120-7129

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, no Figures

Scientific paper

10.1103/PhysRevD.57.7120

Particle creation during inflation is considered. It could be important for species whose interaction is of gravitational strength or weaker. A complete but economical formalism is given for spin-zero and spin-half particles, and the particle abundance is estimated on the assumption that the particle mass in the early universe is of order the Hubble parameter $H$. It is roughly the same for both spins, and it is argued that the same estimate should hold for higher spin particles in particular the gravitino. The abundance is bigger than that from the usual particle collision mechanism if the inflationary energy scale is of order $10^{16} GeV$, but not if it is much lower.

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