Warm hilltop inflation

Juan Carlos Bueno Sánchez, Mar Bastero-Gil, Arjun Berera, Konstantinos Dimopoulos

Research output: Contribution to journalArticlepeer-review


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 η-problem of inflation. However, there is some danger of gravitino overproduction unless the particle content of the theory is large.
Original languageEnglish
Article number123527
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number12
Publication statusPublished - 1 Jun 2008

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