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arXiv · 1210.4105

Superconformal D-Term Inflation

W. Buchmüller·V. Domcke·K. Schmitz
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Abstract

We study models of hybrid inflation in the framework of supergravity with superconformal matter. F-term hybrid inflation is not viable since the inflaton acquires a large tachyonic mass. On the contrary, D-term hybrid inflation can successfully account for the amplitude of the primordial power spectrum. It is a two-field inflation model which, depending on parameters, yields values of the scalar spectral index down to n_s ~ 0.96. Generically, there is a tension between a small spectral index and the cosmic string bound albeit, within 2-sigma uncertainty, the current observational bounds can be simultaneously fulfilled.

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W. Buchmüller, V. Domcke, K. Schmitz. 2013-04-09. Superconformal D-Term Inflation. https://doi.org/10.1088/1475-7516%2F2013%2F04%2F019

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