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- W2103839711 endingPage "017" @default.
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- W2103839711 abstract "Very few explicit inflationary scenarios are known to generate a large bispectrum of orthogonal shape. Dirac-Born-Infeld Galileon inflation, in which an induced gravity term is added to the DBI action, is one such model. We formulate it in the language of the effective field theory of inflation by identifying the unitary gauge operators that govern the behavior of its cosmological fluctuations. We show how to recover rather easily from this its power spectrum and bispectrum, which we calculated previously using standard cosmological perturbation theory. We push our calculations up to the determination of the fourth-order action and of the trispectrum, in which shapes absent in k-inflation arise due to the presence of higher-order derivative operators. We finally discuss the combined constraints set on this model by current observational bounds on the bispectrum and trispectrum." @default.
- W2103839711 created "2016-06-24" @default.
- W2103839711 creator A5070591522 @default.
- W2103839711 date "2013-08-08" @default.
- W2103839711 modified "2023-10-14" @default.
- W2103839711 title "DBI Galileon in the effective field theory of inflation: orthogonal non-Gaussianities and constraints from the Trispectrum" @default.
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- W2103839711 doi "https://doi.org/10.1088/1475-7516/2013/08/017" @default.
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