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More varieties of hybrid inflation
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It is pointed out that hybrid inflation can be implemented with the inflaton field rolling away from the origin instead of towards it. This `inverted' hybrid inflation has a spectral index $ n < 1 $, in contrast with ordinary hybrid inflation which has $ n \gtrsim 1 $, so a measured value of $n$ substantially different from 1 would distinguish the two. Other generalisations of hybrid inflation are also considered.
Forward citations
Cited by 2 Pith papers
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Blue-tilted Runnings and the JWST Early Galaxy Tension
A blue-tilted spectrum with running parameters α_s ≈ 0.2 and β_s ≈ 0.2 resolves the JWST early-galaxy abundance tension at 1σ in a joint CMB analysis.
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Blue-tilted Runnings and the JWST Early Galaxy Tension
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.
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