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2019

Searching for Fossil Fields in the Gravity Sector

Dimastrogiovanni, Emanuela, Fasiello, Matteo, Tasinato, Gianmassimo

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Evidence for the presence of extra fields during inflation may be found in the anisotropies of the scalar and tensor spectra across a vast range of scales.

Indeed, beyond the single-field slow-roll paradigm, a long tensor mode can modulate the power spectrum inducing a sizable quadrupolar anisotropy.
We investigate how this dynamics plays out for the tensor two-point correlator.
The resulting quadrupole stores information on squeezed tensor non-Gaussianities, specifically those sourced by the extra field content and responsible for the breaking of so-called consistency relations.

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