Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-03-22
Physics
High Energy Physics
High Energy Physics - Theory
21+1 pages, 5 figures, LaTeX, v2: added references, v3: very minor changes, version to appear in JHEP
Scientific paper
It has been argued that rather generic features of string-inspired inflationary theories with low-energy supersymmetry (SUSY) make it difficult to achieve inflation with a Hubble scale H > m_{3/2}, where m_{3/2} is the gravitino mass in the SUSY-breaking vacuum state. We present a class of string-inspired supergravity realizations of chaotic inflation where a simple, dynamical mechanism yields hierarchically small scales of post-inflationary supersymmetry breaking. Within these toy models we can easily achieve small ratios between m_{3/2} and the Hubble scale of inflation. This is possible because the expectation value of the superpotential
He Temple
Kachru Shamit
Westphal Alexander
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