D-term inflation after spontaneous symmetry breaking

Details D-term inflation after spontaneous symmetry breaking D-term inflation after spontaneous symmetry breaking

2007-09-13

arxiv.org/abs/0709.2112v1

JCAP0803:016,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

45 pages

Scientific paper

10.1088/1475-7516/2008/03/016

We show that 1-loop quantum corrections to the potential energy density in supersymmetric hybrid inflation, outside the inflationary valley, can not be neglected. A method is presented to calculate these 1-loop corrections and they are applied to the case of D-term hybrid inflation, where a significant amount of inflation is shown to occur after spontaneous symmetry breaking. Taking this into account improves the agreement with WMAP measurements. A gauge coupling of up to 0.3 is still consistent with the CMB density perturbation. The spectral index is predicted in between 0.98 and 1.00 and the cosmic string contribution to the CMB anisotropy is sufficiently reduced.

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