TY - JOUR
T1 - Warm hilltop inflation
AU - Sánchez, Juan Carlos Bueno
AU - Bastero-Gil, Mar
AU - Berera, Arjun
AU - Dimopoulos, Konstantinos
PY - 2008/6/1
Y1 - 2008/6/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=46149125972&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.77.123527
DO - 10.1103/PhysRevD.77.123527
M3 - Article
SN - 1550-7998
VL - 77
JO - Physical Review D
JF - Physical Review D
IS - 12
M1 - 123527
ER -