Superconformal D-term inflation

被引：20
作者：
Buchmueller, W. [1 ]
Domcke, V. [1 ]
Schmitz, K. [1 ]
机构：
[1] Deutsch Elekt Synchrotron DESY, D-22607 Hamburg, Germany
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2013年 / 04期
关键词：
inflation; particle physics - cosmology connection; physics of the early universe; supersymmetry and cosmology; FAYET-ILIOPOULOS TERMS; SUPERGRAVITY;
D O I：
10.1088/1475-7516/2013/04/019
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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) similar or equal to 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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页数：21
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