Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/07/053
Keywords
modified gravity; inflation; gravitational waves and CMBR polarization
Funding
- SITP
- NSF [PHY-1316699]
- Templeton foundation grant 'Quantum Gravity Frontiers'
- ArabFund for Economic and Social Development
- Fulbright Commision Belgium
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We investigate the recently proposed possibility of chaotic inflation with respect to the imaginary part of the field T in a supersymmetric embedding of the Starobinsky model. We show that the stage of rapid expansion driven by Im T in this model ends almost instantly, and the subsequent stages of inflation are driven by the real part of the field T, as in the standard Starobinsky model. Thus, the Starobinsky model and its supersymmetric generalizations remain disfavored by the recent BICEP2 data.
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