Warm hilltop inflation

Bueno-Sanchez, Juan Carlos and Bastero Gil, Mar and Berera, Arjun and Dimopoulos, Konstantinos (2008) Warm hilltop inflation. Physical Review D, 77 (12). ISSN 1550-7998

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We study the low-temperature limit of warm inflation in a hilltop model. This limit remains valid up to the end of inflation, allowing an analytic description of the entire inflationary stage. In the weak dissipative regime, if the kinetic density of the inflaton dominates after inflation, low-scale inflation is attained with Hubble scale as low as 1 GeV. In the strong dissipative regime, the model satisfies the observational requirements for the spectral index with a mild tuning of the model parameters, while also overcoming the eta-problem of inflation. However, there is some danger of gravitino overproduction unless the particle content of the theory is large.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
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Deposited On:
21 Jan 2009 14:13
Last Modified:
21 Nov 2022 19:10