Local Axion Cosmic Strings from Superstrings

Details Local Axion Cosmic Strings from Superstrings Local Axion Cosmic Strings from Superstrings

2005-01-25

arxiv.org/abs/hep-th/0501200v1

Phys.Lett. B611 (2005) 39-52

Physics

High Energy Physics

High Energy Physics - Theory

17 pages

Scientific paper

10.1016/j.physletb.2005.02.038

Axionic cosmic string solutions are investigated in a superstring motivated model with a pseudo-anomalous U(1) gauge symmetry. The inclusion of a gauge field and spatially varying dilaton allow local defect solutions with finite energy per unit length to be found. Fermion zero modes (whose presence is implied by supersymmetry) are also analysed. The corresponding fermion currents suggest strong cosmological bounds on the model. It is shown that the unusual form of the axion strings weakens these bounds. Other cosmological constraints on the underlying theory are also discussed.

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