[1403.4585] Local Reconstruction of the Inflationary Potential with BICEP2 data

[1403.4585] Local Reconstruction of the Inflationary Potential with BICEP2 data:



 "We locally reconstruct the inflationary potential by using the current constraints on $r$ and $n_{\rm s}$ from BICEP2 data. Assuming small and negligible $\alpha_{\rm s}$, the inflationary potential is approximately linear in $\Delta\phi\sim M_{\rm pl}$ range but becomes non-linear in $\Delta\phi\sim 10 M_{\rm pl}$ range. However if we allow for higher value of $\alpha_{\rm s}$, as suggested by the tension between BICEP2 and WMAP / Planck measurements, the local reconstruction is only valid in the range of $\Delta\phi\sim 0.4 M_{\rm pl}$, which challenges the inflationary background from the point of view of effective field theory."



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