Gravitational particle production in braneworld cosmology

Abstract

Gravitational particle production in time variable metric of an expanding universe is efficient only when the Hubble parameter $H$ is not too small in comparison with the particle mass. In standard cosmology, the huge value of the Planck mass $M_{Pl}$ makes the mechanism phenomenologically irrelevant. On the other hand, in braneworld cosmology the expansion rate of the early universe can be much faster and many weakly interacting particles can be abundantly created. Cosmological implications are discussed.

4 pages, 1 figure, v3 with new definition of $\Lambda$ and minor text modifications

References in corpus (1)

• Brane Cosmology and KK Gravitinos

Cited by in corpus (6)

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• Gravitational production of KK states
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• Cosmological Charge Asymmetry and Rare Processes in Particle Physics
• Axion braneworld cosmology
• Particle creation by a massless spin-$\frac{1}{2}$ field in a warped cosmological braneworld scenario