Consistency of cosmic strings with cosmic microwave background measurements

Details Consistency of cosmic strings with cosmic microwave background measurements Consistency of cosmic strings with cosmic microwave background measurements

2004-05-14

arxiv.org/abs/hep-ph/0405133v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 3 figures. Physical Review Letters (submitted)

Scientific paper

In the context of SUSY GUTs, GUT scale cosmic strings formed at the end of hybrid inflation are compatible with currently available CMB measurements. The maximum allowed cosmic strings contribution to the CMB data constrains the free parameters (mass scales, couplings) of inflationary models. For F-term inflation either the superpotential coupling must be fine tuned or one has to invoke the curvaton mechanism. D-term inflation should be addressed in the framework of SUGRA. We find that the cosmic strings contribution is not constant, contrary to some previous results. Using CMB measurements we constrain the gauge and the superpotential couplings.

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