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2013

Reconciliation of High Energy Scale Models of Inflation with Planck

Ashoorioon, Amjad, Dimopoulos, Konstantinos, Sheikh-Jabbari, M. M. et al.

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The inflationary cosmology paradigm is very successful in explaining the CMB anisotropy to the percent level.

Besides the dependence on the inflationary model, the power spectra, spectral tilt and non-Gaussianity of the CMB temperature fluctuations also depend on the initial state of inflation.
Here, we examine to what extent these observables are affected by our ignorance in the initial condition for inflationary perturbations, due to unknown new physics at a high scale $M$.
For initial states that satisfy constraints from backreaction, we find that the amplitude of the power spectra could still be significantly altered, while the modification in bispectrum remains small.

Reconciliation of High Energy Scale Models of Inflation with Planck · Around

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