More hilltop inflation models

Details More hilltop inflation models More hilltop inflation models

2007-07-25

arxiv.org/abs/0707.3826v2

JCAP0712:004,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 25 figures, to appear in JCAP

Scientific paper

10.1088/1475-7516/2007/12/004

Using analytic expressions, we explore the parameter space for hilltop inflation models with a potential of the form $V_0\pm m^2\phi^2 -a\phi^p$. With the positive sign and p>2 this converts the original hybrid inflation model into a hilltop model, allowing the spectral index to agree with the observed value n=0.95. In some cases the observed value is theoretically favored, while in others there is only the generic prediction $|n-1|\lsim 1$.

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