http://arxiv.org/abs/1403.5602
We propose a general chaotic inflation model with non-canonical kinetic term. The form of the potential is fixed due to the requirement that the inflation model is a quadratic form in the large field values of the inflaton. We show that a large coupling in the non-canonical kinetic term allows for the slow-roll inflation with sub-Planckian field values of the inflaton and the successful predictions of the quadratic inflation in light of BICEP2 results are maintained in our model. We find that the inflaton kinetic term is determined by the inflaton vacuum expectation value with the large coupling, so the canonically-normalized inflaton has Planck-suppressed interactions only.
H. Lee
Tue, 25 Mar 14
44/79
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