New inflation in supergravity after Planck and LHC

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30 Citations (Scopus)

Abstract

We revisit a single-field new inflation model based on a discrete R symmetry. Interestingly, the inflaton dynamics naturally leads to a heavy gravitino of mass m3/2=O(1-100)TeV, which is consistent with the standard-model like Higgs boson of mass mh≃126GeV. However, the predicted spectral index ns≈0.94 is in tension with the Planck result, ns=0.9603±0.073. We show that the spectral index can be increased by allowing a small constant term in the superpotential during inflation. The required size of the constant is close to the largest allowed value for successful inflation, and it may be a result of a pressure toward larger values in the landscape. Alternatively, such constant term may arise in association with supersymmetry breaking required to cancel the negative cosmological constant from the inflaton sector.

Original languageEnglish
Pages (from-to)21-26
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume727
Issue number1-3
DOIs
Publication statusPublished - 2013 Nov 25

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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