Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cuscuton Inflation   We study the impact of (generalized) cuscuton models on standard single
scalar field inflation. Generalized cuscuton models are characterized by
spatial covariant gravity where a scalar degree of freedom is made non
dynamical, and there are just two tensor degrees of freedom. The presence of
the non-dynamical scalar field does not spoil inflation but instead the
modifications are, in general, slow-roll suppressed leading to almost
scale-invariant power spectra. However, the extra free parameters, which can be
tuned relatively independently, lead to a larger parameter range for observable
quantities, such as amplitudes and spectral indices of primordial power
spectra. While for the cuscuton model the non-Gaussianties of the curvature
bispectrum are suppressed by the slow-roll parameters and, therefore, outside
the current experimental constraints, generalized cuscuton models (those
outside the GLPV class) can lead to a slight enhanced bispectrum which could be
constrained by future or ongoing experiments.

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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: cond-mat
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
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The categories of this paper are: physics