Trans-Planckian wimpzillas

Details Trans-Planckian wimpzillas Trans-Planckian wimpzillas

2007-02-18

arxiv.org/abs/hep-th/0702143v2

JCAP 0707:005,2007

Physics

High Energy Physics

High Energy Physics - Theory

Replaced with the version to be published in JCAP. Division into sections introduced, discussion expanded, references added, c

Scientific paper

10.1088/1475-7516/2007/07/005

Two previously proposed conjectures--gravitational trans-Planckian particle creation in the expanding universe, and the existence of ultra-heavy stable particles with masses up to the Planck scale (wimpzillas)--are combined in a proposal for trans-Planckian particle creation of wimpzillas. This new scenario leads to a huge enhancement in their production compared to mechanisms put forward earlier. As a result, it requires the trans-Planckian particle creation parameter to be rather small to avoid overproduction of such particles, much less than that is required for observable effects in the primordial perturbation spectrum. This ensures also that wimpzillas are mainly created at the end of primordial inflation. Conditions under which trans-Planckian wimpzillas can constitute the present dark matter are determined.

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