Graviton production from D-string recombination and annihilation

Details Graviton production from D-string recombination and annihilation Graviton production from D-string recombination and annihilation

2006-06-29

arxiv.org/abs/hep-th/0606275v1

Nucl.Phys.B756:16-37,2006

Physics

High Energy Physics

High Energy Physics - Theory

28 pages, 3 figures

Scientific paper

10.1016/j.nuclphysb.2006.08.018

Fundamental superstrings (F-strings) and D-strings may be produced at high temperature in the early Universe. Assuming that, we investigate if any of the instabilities present in systems of strings and branes can give rise to a phenomenologically interesting production of gravitons. We focus on D-strings and find that D-string recombination is a far too weak process for both astrophysical and cosmological sources. On the other hand if D-strings annihilate they mostly produce massive closed string remnants and a characteristic spectrum of gravitational modes is produced by the remnant decay, which may be phenomenologically interesting in the case these gravitational modes are massive and stable.

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