
TL;DR
This thesis investigates energy transfer in string theory throats during the early universe, calculating decay rates and exploring their potential as dark matter candidates based on cosmological and particle physics implications.
Contribution
It provides new calculations of heat transfer and decay rates of throat-localized states using gauge theory duals, including effects of flux compactifications and tachyonic scalars.
Findings
Throats with certain infrared scales can account for dark matter if reheating temperature is high.
Decay rates of Kaluza-Klein modes are highly suppressed, leading to potential dark matter stability.
Possible gamma-ray signals from throat decays could be detectable.
Abstract
In this thesis, we study throats in the early, hot universe. Throats are a common feature of the landscape of type IIB string theory. If a throat is heated during cosmological evolution, energy is subsequently transferred to other throats and to the standard model. We calculate the heat transfer rate and the decay rate of throat-localized Kaluza-Klein states in a ten-dimensional model. For the calculation, we employ the dual description of the throats in terms of gauge theories. We discuss modifications of the decay rate which arise in flux compactifications and for Klebanov-Strassler throats and emphasize the role of tachyonic scalars in such throats in mediating decays of Kaluza-Klein modes. Our results are also applicable to the energy transfer from the heated standard model to throats. We determine the resulting energy density in throats at our epoch in dependence of their infrared…
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Taxonomy
TopicsCosmology and Gravitation Theories · Astronomy and Astrophysical Research · Dark Matter and Cosmic Phenomena
