Cosmic Super-Strings and Kaluza-Klein Modes

Abstract

Cosmic super-strings interact generically with a tower of relatively light and/or strongly coupled Kaluza-Klein (KK) modes associated with the geometry of the internal space. In this paper, we study the production of spin-2 KK particles by cusps on loops of cosmic F- and D-strings. We consider cosmic super-strings localized either at the bottom of a warped throat or in a flat internal space with large volume. The total energy emitted by cusps in KK modes is comparable in both cases, although the number of produced KK modes may differ significantly. We then show that KK emission is constrained by the photo-dissociation of light elements and by observations of the diffuse gamma ray background. We show that this rules out regions of the parameter space of cosmic super-strings that are complementary to the regions that can be probed by current and upcoming gravitational wave experiments. KK modes are also expected to play an important role in the friction-dominated epoch of cosmic super-string evolution.

35pp, 5 figs, v2: minor modifications and Refs. added, matches published version

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Cited by in corpus (9)

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• Particle emission and gravitational radiation from cosmic strings: observational constraints
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• Big-Bang Nucleosynthesis and Gamma-Ray Constraints on Cosmic Strings with a large Higgs condensate
• Cosmic Strings in Hidden Sectors: 2. Cosmological and Astrophysical Signatures
• Discrete Gauge Symmetry and Aharonov-Bohm Radiation in String Theory
• Ultra High Energy Neutrinos: Absorption, Thermal Effects and Signatures
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• Radiation of Supersymmetric Particles from Aharonov-Bohm R-string