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- W3886756 abstract "It is plausible that the scalar density perturbations are created by a relatively low scale model of inflation which predicts the CMB anisotropy and excites Standard Model baryon and cold dark matter, but negligible gravity waves. Nevertheless a significantly large tensor perturbations can be observed if there exists a prior phase of high scale inflation separated by a matter or radiation dominated epoch. In this paper we provide a simple example when the gravity waves generated at high scales trickle through the horizon of the second phase of inflation and leave a distinct imprint in the spectrum of the tensor modes. For a high scale inflation occurring at $Hsim 10^{13}$ GeV while the second phase of inflation happening at $Hsim 1$ GeV, the largest tensor to scalar ratio is bounded by $r_{rm observed}leq0.8$." @default.
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- W3886756 date "2007-12-12" @default.
- W3886756 modified "2023-09-27" @default.
- W3886756 title "Large tensor-to-scalar ratio and low scale inflation" @default.
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