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Non-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models

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abstract

We study non-Gaussianity, the spectral index of primordial scalar fluctuations and tensor modes in models where fluctuations from the inflaton and the curvaton can both contribute to the present cosmic density fluctuations. Even though simple single-field inflation models generate only tiny non-Gaussianity, if we consider such a mixed scenario, large non-Gaussianity can be produced. Furthermore, we study the inflationary parameters such as the spectral index and the tensor-to-scalar ratio in this kind of models and discuss in what cases models predict the spectral index and tensor modes allowed by the current data while generating large non-Gaussianity, which may have many implications for model-buildings of the inflationary universe.

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astro-ph.CO 1

years

2026 1

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UNVERDICTED 1

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  • Blue-tilted Runnings and the JWST Early Galaxy Tension astro-ph.CO · 2026-05-21 · unverdicted · none · ref 46 · 2 links · internal anchor

    Blue-tilted running spectrum with α_s ≈ 0.02 and β_s ≈ 0.02 resolves JWST early galaxy tension at 1σ in joint CMB analysis.