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arXiv · 1403.7518

Resurrecting Quadratic Inflation in No-Scale Supergravity in Light of BICEP2

John Ellis·Marcos A. G. Garcia·Dimitri V. Nanopoulos·Keith A. Olive
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Abstract

The magnitude of primordial tensor perturbations reported by the BICEP2 experiment is consistent with simple models of chaotic inflation driven by a single scalar field with a power-law potential \propto ϕ^n: n \simeq 2, in contrast to the WMAP and Planck results, which favored models resembling the Starobinsky R + R^2 model if running of the scalar spectral index could be neglected. While models of inflation with a quadratic potential may be constructed in simple N=1 supergravity, these constructions are more challenging in no-scale supergravity. We discuss here how quadratic inflation can be accommodated within supergravity, focussing primarily on the no-scale case. We also argue that the quadratic inflaton may be identified with the supersymmetric partner of a singlet (right-handed) neutrino, whose subsequent decay could have generated the baryon asymmetry via leptogenesis.

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John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos, Keith A. Olive. 2014-04-04. Resurrecting Quadratic Inflation in No-Scale Supergravity in Light of BICEP2. https://doi.org/10.1088/1475-7516%2F2014%2F05%2F037

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