Kaehler potentials for hilltop F-term hybrid inflation

Journal Article · Wed Apr 15 04:00:00 EDT 2009 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2009/04/024· OSTI ID:22156974

We consider the basic supersymmetric (SUSY) models of F-term hybrid inflation (FHI). We show that a simple class of Kaehler potentials ensures a resolution to the {eta} problem and allows for inflation of hilltop type. As a consequence, observationally acceptable values for the spectral index, n{sub s}, can be achieved constraining the coefficient c{sub 4K} of the quartic supergravity correction to the inflationary potential. For about the central value of n{sub s}, in the case of standard FHI, the grand unification (GUT) scale turns out to be well below its SUSY value with the relevant coupling constant {kappa} in the range (0.0006-0.15) and c{sub 4K} {approx_equal} -(1100-0.05). In the case of shifted [smooth] FHI, the GUT scale can be identified with its SUSY value for c{sub 4K} {approx_equal} -16 [c{sub 4K} {approx_equal} -1/16].

• OSTI ID: 22156974
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 04 Vol. 2009; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
COUPLING CONSTANTS
GRAND UNIFIED THEORY
INFLATIONARY UNIVERSE
SUPERGRAVITY
SUPERSYMMETRY