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

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Cited by in corpus (7)

• Constraints on Dark Matter Annihilation Cross Section in Scenarios of Brane-World and Quintessence
• Particle creation in the presence of a warped extra dimension
• Gravitational production of KK states
• Renormalized stress tensor of a quantized massless scalar field in warped cosmological braneworld background
• Axion braneworld cosmology
• Cosmological Charge Asymmetry and Rare Processes in Particle Physics
• Particle creation by a massless spin-$\frac{1}{2}$ field in a warped cosmological braneworld scenario