String Necklaces and Primordial Black Holes from Type IIB Strings

Details String Necklaces and Primordial Black Holes from Type IIB Strings String Necklaces and Primordial Black Holes from Type IIB Strings

2009-06-19

arxiv.org/abs/0906.3695v2

JHEP 0912:033,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

45 pages, 9 figures, LaTeX; published version

Scientific paper

10.1088/1126-6708/2009/12/033

We consider a model of static cosmic string loops in type IIB string theory, where the strings wrap cycles within the internal space. The strings are not topologically stabilised, however the presence of a lifting potential traps the windings giving rise to kinky cycloops. We find that PBH formation occurs at early times in a small window, whilst at late times we observe the formation of dark matter relics in the scaling regime. This is in stark contrast to previous predictions based on field theoretic models. We also consider the PBH contribution to the mass density of the universe, and use the experimental data to impose bounds on the string theory parameters.

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