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• W2162170744 abstract "We extend previous work on the minimal D-term inflation model modified by right-handed (RH) sneutrino fields to include additional inflaton-sector supergravity corrections and two-field inflation effects. We show that supergravity corrections simultaneously allow ${n}_{s}$ to be within 3-year Wilkinson Microwave Anisotropy Probe limits and the cosmic string contribution to the cosmic microwave background (CMB) power spectrum to be less than 5%. For gauge coupling $gensuremath{le}1$, the CMB contribution from cosmic strings is predicted to be at least 1% while the spectral index is predicted to be less than 0.968 for a CMB string contribution less than 5%. Treating the inflaton-RH sneutrino system as a two-field inflation model, we show that the time-dependence of the RH sneutrino field strongly modifies the single-field results for values of RH sneutrino mass ${m}_{ensuremath{Phi}}>0.1H$. The running spectral index is $ensuremath{alpha}ensuremath{approx}ensuremath{-}0.0002$ when ${m}_{ensuremath{Phi}}<0.1H$ but increases to positive values as ${m}_{ensuremath{Phi}}/H$ increases, with $ensuremath{alpha}>0.008$ for ${m}_{ensuremath{Phi}}>1.0H$." @default.
• W2162170744 created "2016-06-24" @default.
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• W2162170744 date "2008-03-25" @default.
• W2162170744 modified "2023-10-18" @default.
• W2162170744 title "Supergravity and two-field inflation effects in right-handed sneutrino-modified D-term inflation" @default.
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• W2162170744 doi "https://doi.org/10.1103/physrevd.77.063529" @default.
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